Cooler Fan Sensor
Monday, September 6th, 2010|
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BFC2200 Essick Air Swamp Cooler With Turbo Tip Fan Blade $169.95 With its convex-shaped grille and sleek design, Essick Air’s BFC2200 is a portable swamp cooler designed for spot cooling. A leading evaporative cooler, the BFC2200 is designed with turbo tip fan blades that create a powerful performance unmatched by similar products in the market. Essick Air’s mobile cooler has many attractive features that make it a highly desirable evaporative cooler. Powerful Cooling: New turbo tip fan blade technology provides 30% more airflow than similar products on the marketDual Function: Box fan cooler functions as evaporative cooler and fan Convenience: Rear access door allows easy water fillDesign: Strategically located at the top of the frame, the water distributor evenly distributes water across the evaporative media for maximum cooling performanceDurability: A non-corrosive plastic pad frame houses the evaporative media pad and durable polyester filterStyle: Convex-shaped grille and sleek product design with recessed handle and knobGuarantee: 1-Year Limited Warranty on cabinet and partsRange: Cools up to 250 square feet |
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FH-797 Fujitronic Evaporative Cooler With 411 CFM $119.99 Do you live where it is hot AND dry? Do you want an air conditioner, but not the expense? A Fujitronic FH-797 Portable Swamp Cooler will help you keep cool and keep bills down. This portable, evaporative cooler works without Freon or compressors that are expensive to run, and hard on the environment. Use the multi-purpose swamp cooler as a cooler or a fan. Weighing only slightly over 30 pounds, the Fujitronic FH-797 is still portable, and since it uses ordinary tap water, it can be used anywhere with an appropriate outlet! |
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SF-610 Sunpentown Evaporative Cooler $119 Get More Cooling Power – Upgrade to the NewAir AF-330 for Just a Few Dollars More!Is the price of air conditioning getting you down? Get the Sunpentown SF-610 Evaporative Cooler and stop sweating the cost! This portable unit is lightweight and energy efficient, using only 60W of power input! The oscillating louvers help to evenly distribute the air throughout any space. Unit includes an ice compartment for extra cooling. As an added benefit, the SF610 comes with an air filter and an ionizer to clean the air as it cools your space! The unit can also work as a fan or humidifer if the temperature is not an issue. Includes a remote control for your convenience. With a total weight of 16.5lbs., the SF610 by Sunpentown is perfect for all of your spot cooling needs! |
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SF-611 Sunpentown Evaporative Cooler $109 Get More Cooling Power – Upgrade to the NewAir AF-330 for $10 Less!Protect yourself from the sweltering heat of summer with the Sunpentown SF611 Evaporative Cooler! This cost efficient unit features an independant humidifier and fan for when the cooling mode is not in use. Forget about heavy A/C units, this portable Evaporative unit weighs 31lbs. and includes lockable casters for easy mobility! The SF-611 has oscillating louvers to evenly distribute the cold air throughout any space and, with a three speed air flow, you will be sure to keep things cool! Unlike most units, the SPT SF-611 contains a 3D cooling pad which allows the pad to stay in contact with the water for a longer period of time. The pad is treated to perform with maximum absorption and retention of water and also with an Anti-Rot chemical to prevent algae and bacteria growth. Whatever your cooling needs may be, the SF-611 by Sunpentown is sure to get the job done! |
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FH-776HL Fujitronic Swamp Cooler With Negative Ion Purification $109.95 The Fujitonic FH-776HL Portable Evaporative Cooler improves the air quality in your home through evaporative cooling and negative ionization. The Fujitronic FH-776HL Whirl Wind swamp cooler rolls on four casters, and includes 4 functions in 1 convenient package! Set the fan, air cooler, humidifier, or ionic air purifier with one convenient remote control. Getting cool on those HOT, DRY days doesn’t get any easier than this. You’ll enjoy the comfort of energy-efficient cooling; the FH-776HL will bring you relief from dry skin, and a healthy, clean atmosphere. The FH-776HL evaporative swamp cooler can cool areas of up to 350 square feet, and it is perfect for hot, dry climate areas. Just add water to cool and humidify.This amazing air cooler comes ready to go with a remote control and 7.5 hour timer. The washable filter keeps costs low and improves ease of use since there’s no replacements to buy. Adjustable air vents and three fan speeds help keep you affordably cool. Experience the Fujitronic FH-776HL evaporative cooler today! |
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SF-616 Sunpentown Evaporative Cooler with rotating louvers $99.99 The SF-616 Evaporative Air Cooler works wonderful in dry desert areas to help cool. Much more efficient than an air conditioner the SF-616 uses a 3 dimensional cellulose pad to absorb water and spread humidity though the home to cool it down. With a remote control the SF-616 is easy to set the fan mode and speed from your arm chair.The rotating louver on the SF-616 allows the Evaporative Cooler to reach more areas of the room in a quick manner. Sit back and relax because you can set a timer and keep for up to seven and a half hours!For a cool home and the simplicity of an evaporative cooler the SF-616 from Sunpentown if for you! |
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FH778 Fujitronic Swamp Cooler 4-in-1 Functions $119.99 Experience the Fujitronic FH-778 Swamp Cooler for the freshest air, most comfortable cooled or warmed rooms, and a humidified, non-dry space.A WATER SPRINKLING CYCLIC SYSTEM WITH AN ICE COMPRESS WORKS FOR EXTRA COOLING.Plus, with the oxygen bar, negative ions are released and fresh air will flow throughout the room of your choice, where the FH-778 is placed. It cools areas of up to 350 square feet and comes with 3 fan speeds in case you prefer only a light breeze. Order the Fujitronic FH-778 for whatever your comfort needs may be! |
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WC-163 WindChaser Electric Misting Fan Cooler – 40,000 BTU – COOLS 650 SQ FT. $95 The WindChaser WC-163 is a 16″ Electric Oscillating Misting Fan featuring 40,000 BTUs of cooling power! Combining controlled force with a fine spray of water as it blows, the WindChaser easily covers expansive areas of up to 650 sq.ft.!!This powerful misting fan is only recently available for the public. It is the perfect way to bring luxury and comfort to your backyard gathering, large patio, or sporting event sideline. The Wind Chaser can even bring some heat-relief to a contractor’s workplace or an industrial jobsite. This unit cools large areas for much less expense than an air conditioner, and it conveniently connects to a standard hose for continuous misting. The WindChaser WC-163 misting fan features a high velocity 3 speed shower proof motor, UV and rust resistant assembly, and can be adjusted to 54â€? in length. This unique type of fan can reduce the surrounding temperatures by as much as 25 degrees! |
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AF-330 NewAir Swamp Cooler With Built In Ionizer $109 When you need supplemental cooling or an alternative to air conditioning, consider eco-friendly swamp coolers such as the NewAir AF-330. This evaporative swamp cooler delivers refreshingly cool air for just pennies day – much less than traditional air conditioning! Best of all, we’re offering the AF-330 at an incredible price – TAKE ADVANTAGE OF THIS DEAL WHILE IT LASTS! 8 Hour Programmable Timer: Keep your cooling completely energy efficient by programming it to switch off automatically at a chosen number of hours ahead. You can either set the machine to turn off 1, 2, 4, or 8 hours ahead or keep the machine running continuously by turning the timer off. 3 Selectable Fan Speeds: There are three air speeds that are selectable to customize your cooling experience. The settings are low, medium or high.Fixed or Continuously Sweeping Air Flow: The swing button on the control panel switches the oscillation feature on for evenly distributed cool air. For fixed air flow, the oscillation can be turned off once the oscillation louvers are in your desired position. Built-in Ionizer, Carbon Filter, and HEPA Filter: The ionizer can be turned on to introduce negative ions into the air. The carbon filter eliminates odors and the HEPA filter removes up to 99.97 percent of particles from the air. Revolutionary Cooling Pad: This expertly designed water cooling pad never needs to be replaced. |
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Surround Symphony Portable Evaporative Air Cooler Offers Environmentally-Friendly Cooling $139 The Surround is unlike other swamp cooler. With 3 sides of air cooling pads, this compact cooler delivers more cool air than any in its size. In fact, this is one of the best midsized coolers and the low cost of usage and eco-friendly design makes it an unbeatable buy. The Symphony Surround portable swamp cooler triples the cooling pad exposure and fits it into a light, compact unit for convenient portability. This swamp cooler has high levels of air output, a 650 CFM, and the additional option to turn the adjustable water circulation off and use the unit in "fan only" mode. Gets yours today at a special promotional price – hurry, this deal won’t last!Powerful Cooling: With 1100 m3.hr/650 CFM and 1400 RPM, this powerful cooler is one of the strongest evaporative coolers on the market Energy-Efficient: The Symphony Surround portable evaporative air cooler harnesses the power of evaporation in order to lower temperatures It costs only pennies a day to operate – significantly less than any air conditionerHigh-Efficiency Cooling Pads: Triple cooling pads are specially-treated and designed for high performance and maximum water absorption Fully Portable: Built-in casters make it easy to take the cooling right where you need it – perfect for the living room, kitchen, shop, or garage Range: Cools up to 15 square meters (150 square feet), with an air throw of 10 meters (33 feet) |
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FH776 Fujitronic Swamp Cooler Ionic Air Purifier Included $109.95 What’s better than getting a great deal on your portable cooler? Getting the benefits of four machines in one! The Fujitronic FH-776 Whirl Wind functions as an air cooler, fan, humidifier, and ionic air purifier—everything you need to guarantee a comfortable living and working space. You’ll enjoy the comfort of energy-efficient cooling, relief from dry skin, and a healthy, clean atmosphere. THREE SELECTIONS OF WIND SPEED AND MODE ALLOW FOR CUSTOMIZATION AND ADDED CONTROL.Smooth-gliding wheels give the Whirl Wind easy mobility, and the remote control lets you adjust settings effortlessly. The silver plating adds a finishing touch, so don’t miss out—order your own Fujitronic FH-776. |
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KA50 Port A Cool KuulAire Portable Evaporative Swamp Cooler Features 1000 CFM $249 The KuulAire KA50 Portable Evaporative Swamp Cooler works where traditional air conditioning is unavailable, impractical or cost prohibitive. It provides cool, fresh and filtered air and is easy to operate, easy to clean and easy to maintain. The KuulAire KA50 portable evaporative swamp cooler can be used as a cooler, fan and humidifier. This means you can use it almost all year round. There are also three fan speed settings so the strength of the cooling is fully adjustable. The direction of the cooling is also directed by the oscillating louvers. The KA50 portable evaporative swamp cooler includes a remote control for convenient control. It cools up to 350 square feet with 1000 CFM. It is portable, compact and attractive. A one year limited warranty is also included. |
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KA70 Port A Cool KuulAire Portable Evaporative Swamp Cooler Features 500 CFM $219 The KuulAire KA70 Portable Evaporative Swamp Cooler creates the naturally occurring evaporation process and provides a flow of cool, refreshing air into a hot, uncomfortable environment. It has a new modern appearance and features manual switch operation for easy adjustment. The KuulAire KA70 portable evaporative swamp cooler features three fan speed settings and can function as a cooler, fan and humidifier. It can hold four gallons so you don’t have to refill it often. Oscillating louvers are included so that the cool air is spread throughout the area. The KA70 portable evaporative swamp cooler provides cool, fresh and filtered air and is completely portable. The design is compact and attractive to fit into any decor. A one year warranty is included so you don’t have to worry about defective units. |
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KA40 Port A Cool KuulAire Portable Evaporative Swamp Cooler Features 500 CFM $149 Enjoy cool, clean comfort with the new KuulAire KA40 portable evaporative cooler by Port A Cool. This multi-functional air cooler can be used as a swamp cooler, fan, or dehumidifier, and is ideal for any room at home or in the office. The economical Port A Cool KuulAire KA40 personal swamp cooler provides cool air for areas up to 150 square feet without Freon or loud compressors that are both expensive and hard on the environment. The large, 2.6 gallon capacity water tank allows for longer operating times while rolling casters provide easy maneuverability. Sweeping louvers also help evenly distribute cool air for maximum comfort. Best of all, the KuulAire KA40 evaporative cooler actually filters the air as it cools it so you can breathe easier. Additional features include a full-function remote for easy operation, an 8-hour timer, and 1-year limited manufacturer’s warranty. |
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CV-600 Convair Swamp Cooler – VALUE GROUND SHIPPING! With 2130 BTUs $129 ADD TO CART TO SEE OUR SUPER LOW VALUE PRICED SHIPPINGUsing the cooling power of evaporation, the Convair Cool Wind 600 cools and filters fresh outdoor air, then distributes it over 200 square feet for your comfort. Set in front of a partly open door or window, the cooler first pumps water from a 1.6-gallon reservoir through its cooling pad. A 2-speed fan then draws fresh air through the pad, lowering its temperature and circulating it. While air draws through, a filter traps pollen and dust before they enter your space.Simple to operate, the unit is both quiet and energy-efficient, using the same energy as a 60-watt light bulb. It’s ideal for hot and dry climates, transports easily, and is made from rust-resistant polymers. It can also be used without water as a basic fan. Structural details include simple dials for temperature and speed control and a front-mounted gauge that indicates when the reservoir is low. The cooler measures 28-1/2 by 17 by 9 inches |
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Winter-XL Symphony Portable Evaporative Cooler Features 3,000 CFM of Cooling $389.95 Need a versatile and economical way to cool down large areas? The Winter-XL evaporative cooler may be just what you’re looking for! This portable air cooler lowers surrounding temperatures and humidifies your air through the simple power of evaporation. Biodegradable, high-efficiency, four-sided Aspen cooling pads provide cooling in every direction while automatic louvers increase air distribution. The super powerful motor and non-corrosive fan also work together to give you over 3,000 CFMs of cooling power in areas up to 750 square feet — more than any other air cooler in this size range!Powerful Cooling: Simply put, the Symphony Winter-XL is one of the strongest evaporative coolers on the market. It offers an amazing 3,000 CFMs of cooling with 55 foot air throw — comparable to many commercial units!Energy-Efficient: The Symphony Winter XL swamp cooler harnesses the power of evaporation in order to lower temperatures. It costs only pennies a day to operate — significantly less than any air conditioner!High-Efficiency Cooling Pads: The Winter XL’s four-sided Aspen cooling pads are specially-treated and designed for high performance and maximum water absorption. Fully Portable: Rolling casters allow you to easily roll this swamp cooler from room to room with ease. Multi-Functional: The Symphony-XL does more than just cool: it also humidifies and freshens the air so you can breathe easier! |
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Sunpentown SF-613 Portable Evaporative Cooler With Built-in Humidifier and Ionizer $107.95 Want fresh cool air in your home without all the hassle of an air conditioner? The SF-613 Evaporative Cooler is an economical way to humidify your dry climate while pushing out cool air. The SF-613 can lower your surrounding temperature and humidify the air using the evaporation of the air.The SF-613 can be rolled around the room to bring cool air where you need it. You can then lock the wheels in place to be sure your unit is secure. The SF-613 will shoot out a stream of cool air; the oscillating louvers can spread the cool air throughout the room to evenly distribute the air. A convenient remote control allows you to change the settings from your arm chair. The SF-613 is also very versatile. You can use it as a fan, a humidifier, or an air purifier. Such a versatile machine as the SF-613 is an asset to any home. |
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FH-777 Fujitronic Swamp Cooler Has a Modern Design That’s Superior to the Competition $92.99 The Fujitronic FH-777 Swamp Cooler is the perfect choice for those suffering from the heat in dry, arid environments, and unlike other swamp coolers, the FH-777 has a tall, thin, streamlined design that saves space and will better match your home decor. Fujitronic knows that everyone needs some sort of climate control, but that doesn’t mean you should be forced to use a bulky, boxy appliance. It should help you feel comfortable without ever knowing it’s even there.The FH-777 features a four liter water tank that’s large for the size of the unit, and even comes with ice packs, so that the moist air it blows can be cooled as well. Like a fan, it has a 60° range of oscillation, so it can spread moisture evenly and efficiently. It requires no permanent installation to a water line (just a refillable water tank) and uses a standard, 110V power outlet, so you can just fill it up, plug it in, and feel that moist air give your dry skin some relief!This Fujitronic swamp cooler comes equipped with a wealth of convenient electronic features. A remote control is included, so you can change your settings without the hassle of getting up from your seat, and a 0.5-7.5 hour timer further adds to the touch-free operation of the FH-777. Finally, it has five different air speed settings. The standard High, Medium, and Low, are present, but Fujitronic has installed a "Nature" and "Sleeping" setting. "Nature" feels more like a natural breeze, with small gusts in between the standard speed, and "Sleeping" is perfect for overnight use, as it runs quieter and lower.For a modern, compact, and super-convenient swamp cooler, you can’t go wrong with the Fujitronic FH-777! |
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AF-310 NewAir Evaporative Cooling Fan With Ionizer and Remote – FREE GROUND SHIPPING! $99 Stay cool without spending a fortune on air conditioning with the multi-functional NewAir AF-310 electric tower cooling fan! This innovative appliance functions as an air cooler, air circulator, humidifier, and air purifier for true versatility. Multiple air speeds and cooling modes as well as a full-function remote and 60-degree oscillation ensures optimal comfort. Energy-efficient evaporative technology adds fresh, moist air, making the NewAir AF-310 great for drier climates. 4-in-1 DesignThis air cooler takes the place of four different appliances and works as a swamp cooler, fan, humidifier, and air purifier!Built-In IonizerThe NewAir AF-310 has an ionizer that gently freshens your indoor air with negative ions. Harmful particles such as dust, pet dander, and pollen are also eliminated. Streamlined Body DesignThis evaporative air cooler features a thin, streamlined design to save space. It easily fits into the corner of your room and seamlessly blends in with your existing decor. Easy-to-Use ControlsThe AF-310 tower fan by NewAir has a large LCD display with push button controls and a full-function remote for easy operation. Oscillating LouversThis evaporative cooling fan features 60-degree oscillation for multi-directional airflow. |
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AF-321 NewAir Swamp Cooler – FREE GROUND SHIPPING! With Built-in Carbon Filter – FREE GROUND SHIPPING! $119.95 Portable swamp coolers, like the NewAir AF-321 are cost effective, easy to install and easy to maintain ways to cool down specific areas of your home. They are best used in hot, arid climates and utilize the simple process of evaporation to cool the air. This particular swamp cooler can be shipped to you for free. Here are the other reasons why you should purchase this air cooler now:Space-Saving Design : The compact design allows this cooler to be maneuvered very easily. Smaller spaces up to 150 square feet can be cooled very effectively. Personalized Cooling :Three selectable fan speeds are included for custom cooling. Direct the air in the desired direction with the oscillating louvers.Specially Designed Cooling Pads :Features a higher cooling efficiency in comparison to similar models because the pads retain a greater amount of liquid. They also never need to be replaced. Large Capacity :The 13 liter tank allows for a greater amount of time between refills. The dedicated 4 liter ice tank is included for enhanced cooling.Enhances Decor :The sleek design and white hue blend in with a variety of home decors. Also includes large rolling casters for increased mobility. |
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7500-1 Seabreeze Cool Sweep Portable Fan With Wall Mounting Capabilities $49.95 The Seabreeze 7500-1 Cool Sweep portable fan is your answer to quick and efficient air cooling during any season of the year. As a fan it also circulates air with its 4 louvers to keep your air feeling fresh and revitalized. The 7500-1 makes an awesome addition to your home or workplace because it features many great aspects, including:Sweeping PowerUsing only 88 watts of power, the 7500-1 Cool Sweep can sweep your air 45 times per minute, leaving it feeling crisp and new. This allows you to use the Cool Sweep during seasons where air can get stale.Perfectly BalancedThe 7500-1 Cool Sweep fan balances on a pivot so that it can be angled to any degree. It will also lock itself in position so that you don’t have to readjust it minute by minute. It also has a small footprint, and can be used on tabletops with ease.Mountable OptionThe Cool Sweep electric portable fan can be mounted on the wall and used as a permanent fixture. It can be a great addition to studios and workshops that require efficient and quick cooling.Variety of UsesAlthough most consumers would associate fan with cool and cold, the 7500-1 Cool Sweep also circulates air to keep it feeling fresh and new. You can use this fan during cooler seasons for its air sweeping properties. |
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FC1-42R-03 Soleus Stand Tower Fan Includes Separate Oscillation Control $59.99 Whether in the home or office the Soleus FC1-42R-03 Electronic 42� Stand Tower Fan offers plenty of options to keep a room for a specified temperature that suits you best.A sleek design and packed to the brim with options the FC1-42R-03 can cool a room in record time. It offers 3 fan speeds and 3 wind modes for a variety of cooling effects. Plus it has separate oscillation for you to control. Never worry about having to get up and walk over to set your fan ever again as the FC1-42R-03 comes with a remote control. Merely point and click and enjoy basking in the cool air of your desired setting.The FC1-42R-03 is extremely environmentally friendly. It has a 7.5 hour auto-off timer that will help keep your energy bill under control. Purchase the FC1-42R-03 and start enjoying a cooler and quieter environment today. |
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FH-776T Fujitronic Swamp Cooler With 6.5L Water Tank Capactity $94.99 Cool off and humidify your space with the Fujitronic FH-776T portable Whirl Wind Swamp Cooler—with fan, humidifier, and Ionic Air Purifier functions included! Take advantage of the eight hour timer and remote control to make your life easier, or simply turn and choose one of the three selections of wind speeds or modes to avoid uncomfortable weather and enjoy you home!2 ICE PACKS ALLOW FOR EVEN MORE COOLING THAN EVER BEFORE—ALL YOU NEED IS 120 VOLT POWER OUTLET!While the FH-776T was designed, health was in mind, as well, and an oxygen bar was built in to release negative ions and purify the air you breathe.Enjoy your own FH-776T! |
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FP-P35CX Sharp HEPA Air Purifier With Automatic Dust Sensor $255 Do you suffer from allergies, asthma, or just want to breathe cleaner air? The Sharp FP-P35CX air purifier removes a range of airborne irritants using an ultra-quiet fan that draws contaminated air through an advanced 2-stage filtration system. This room air purifier is ideal for achieving cleaner, more breathable air in areas such as bedrooms, living rooms, and small offices.True HEPA FilterThe Sharp FP-P35CX room air purifier utilizes a True HEPA filter that removes up to 99.97 percent of particles as small as 0.3 microns. Each filter also lasts up to 5 years with normal use. Library QuietThis air purifier is among one of the quietest HEPA air purifiers around. When set to silent, the unit emits only 14 decibels of sound. This is roughly the sound volume of rustling leaves.Multiple SettingsThe FP-P35CX by Sharp features 3 different fan speeds as well as pollen and Quick Clean modes. Automatic OperationA built-in dust sensor automatically adjusts the unit’s fan speed depending on the level on contaminants present in your air. Incredibly Energy EfficientThe Sharp FP-P35CX is 35 percent more energy efficient than comparable units and is Energy Star qualified. |
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WC163C WindChaser Inc. Misting Fan Features 40,000 BTUs of Cooling $99 Great for situations where air conditioning just isn’t an option, the WindChaser WC163C oscillating electric misting fan with cover comes to the rescue! Get cooling relief at your next sporting event, backyard gathering, or warehouse with this incredible misting fan. The WC163C offers 40,000 BTUs of cooling and covers large areas up to 640 square feet. Set-up and operation is also a snap: with just an electrical connection and a standard garden hose, you’ll feel immediate cooling at just a fraction of the cost of standard air conditioner. The WindChaser WC163C dramatically lower temperatures and creates a cooling effect that feels up to 25° F cooler. Its high-output, high-velocity 16" fan with a shower-proof motor is also rust-proof and designed to withstand the element. The fan height is adjustable up to 56 inches. Safety features include immersion shock protection and UL-certification. Also included is a protective cover.See the WindChaser WC163C in action: |
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AF-315 NewAir Portable Swamp Cooler With Selectable Air Delivery Modes $89.95 It is not unusual to begin caring about whether your home appliances are environmentally friendly. Air conditioners often used Freon, which can be harmful to the Earth’s delicate atmosphere. Swamp coolers use the all-natural process of evaporation to cool the air. They are ideal for direct spot cooling and very inexpensive to purchase and operate. More reasons to purchase are: Pleasing Design: The silver and black frame and slim, compact design allows it to fit in almost anywhere. It is less than a foot wide so it delivers powerful cooling without monopolizing floor space. Enhanced Cooling: Features large water and ice tanks for superior cooling ability. The access doors to these tanks are conveniently placed as well. Selectable Speeds and Air Delivery Modes: High, medium and low speeds are available on the cooling or fan-only modes. There are also three modes of cooling available (normal, natural and sleeping wind) to customize the frequency and strength of the air flow. Air Quality Improvement: A built-in anion generator releases anion to help you sleep, kill germs and freshen the air. There is also a regenerative light contact agent that absorbs harmful chemical gases and a spray type purifying function that cleans volatile organic compounds. Wider Cooling Area: The oscillation feature spreads the cooled air over a wider area. There is 100 degree large angle air delivery featured as well that really pushes the air throughout the room. |
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Lasko 2155A 16 Inch Reversible Window Fan In White With Storm Guard Feature $79.95 Trying to cut down on air conditioner use? If so, the 2155A window exhaust fan may just be the perfect cooling alternative. This 16-inch electrically reversible window fan pulls in cooler air from the outside while expelling warm air from within. Energy-EfficientThe 2155A costs just pennies a day to run and is much more energy-efficient than a traditional window, wall, or central AC unit.Patented Storm Guard FeatureThis allows you to close the window behind fan for safety and security during inclement weather or while you’re away.Super PowerfulThe Lasko 2155A is powerful enough to circulate the air in as many as three rooms.Easy OperationThe 2155A is incredibly easy to operate. The electrically reversible motor works with just a quick twist of the dial. |
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T8602D Honeywell Thermostat For an Electric or Conventional Heat Fan $119.95 Stay warm or cool while enjoying energy savings and precise, environmental control with the T8602D2018 Honeywell programmable thermostat. This affordable thermostat provides electronic control of 24-V single-stage heating and cooling systems, 750-mV gas heating systems, and 750-mV gas heating systems with 24-V cooling systems. The large backlit LCD gets an extra boost of brightness and clarity from battery power as part of the Chronotherm design from Honeywell.AS A CONFIGURABLE THEMROSTAT THIS MODEL CAN BE USED TO REPLACE MANY DIFFERENT THERMOSTATS!!!The attractive styling complements any home and is even able to connect with an outdoor temperature sensor for a more accurate temperature reading than you will find with a thermometer. Begin experiencing Chronotherm temperature control with the Honeywell T8602D2018 thermostat. |
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HiCool Evaporative Cooler – REFURBISHED $129.95 Enjoy powerful cooling that really travels! The HiCool evaporative air cooler by Symphony is entirely portable, so you can easily move it from room to room—or wherever you need a refreshing blast of cool air. Effective up to 200 square feet, the HiCool features humidity control, so you’ll never have to worry about water damage. An ice chamber enhances the unit’s cooling effect. High safety ratings and a water level indicator to prevent spills let you enjoy worry-free refreshment. |
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Essick Air BFC2200 Portable Swamp Cooler – REFURBISHED $89.95 With the Essick Air BFC2200 portable swamp cooler, you won’t break the bank—you won’t even break a sweat! This evaporative cooler is easy to operate and highly mobile for portable cooling in spaces up to 250 square feet. The BFC2200 evaporative swamp cooler filters the air as it cools, making it perfect for eliminating office irritants or creating a healthy environment for children or allergy sufferers. Energy-efficient and highly economical, the swamp cooler costs only two cents an hour to operate! |
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WC-06 Sunpentown Six bottle Thermoelectric Wine Cooler $97.95 Looking for a contemporary finish cooler that will keep your wines at the perfect temperature and in the best condition? Consider the Sunpentown WC-06 Thermo Electric Wine Cooler with a six bottle capacity! This wine cooler has a sleek, platinum tone case and trim coupled with a reflective glass door, touch sensitive control panel with LED temperature display and an adjustable temperature range from 44°F to 66°F. Exceptional design and function: The Sunpentown WC-06 Wine Cooler is delicately cooled by a ThermoElectric cooling system – *NO* compressor! Without the old-fashioned compressor, the excessive vibration that would stir up bottle sediment is virtually eliminated. Conveniently access your bottles with two slide out shelves, and insure stable placement of the cooler with a built-in front leveling leg. |
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Haier CPN12XC9 12,000 BTU Portable Air Conditioner Includes 3 Fan Speeds $479.99 Upgrade to the NewAir AC-12000E Portable Air Conditioner and Get the Same Cooling Power for $100 Less!A portable air conditioner makes efficiently cooling small spaces like bedrooms and offices easy when installation a traditional cooling system is not possible. The Haier CPN12XC9 Portable Air Conditioner makes it easy to cooler larger rooms too because it features 12,000 BTUs of cooling power. The other extraordinary features included with the CPN12XC9 are: Environmentally Friendly: Complies with the RoHS which prohibits the uses of Lead and Mercury in the manufacture of portable air conditioners. Also uses earth-friendly R-410A refrigerant. Auto Evaporation: The CPN12XC9 can run continuously without anyone having to empty and water tank because any excess moisture created is auto evaporated. Dehumidification Capabilities: Mold growth is one of the dangers of excess moisture in the air. This portable AC prevents mold growth in your home by removing the excess moisture in the air. A 24 Hour Timer: Do not worrying about running the air conditioner when you are out of the room or asleep because an on/off timer is included. Just set the amount of hours you would like the cooler to run. |
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WC-32U Sunpentown Under-Counter Wine and Beverage Cooler $339.95 The new must-have under-counter appliance – the Sunpentown WC-32U Wine and Beverage Cooler! Just set your preferred temperature on the one-touch digital control panel, add your favorite wines or beverages to the 32 bottle / 90 liter capacity cabinet and you’ll have perfectly chilled potables available at a moments notice. Designed for under-counter installation: With the Sunpentown WC32U Wine and Beverage Cooler you won’t have to worry about ventilation room behind or around the cooler, its vents are run along the floor under the door! The dimensions of the WC32U are very similar to a standard trash compactor, so it’s very easy to use that space to accommodate this gourmet appliance instead. But, you aren’t limited to built in spaces – this cooler will also work for freestanding applications too. Convenient size and upscale styling: With double pane, insulated, tinted glass doors framed in a platinum finish and a black case, the Sunpentown WC-32U wine bottle cooler will complement most decors. Features a one-touch digital control and temperature display for easy adjustments and monitoring, with a temperature range of 41° to 64°F. |
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WC-12 Sunpentown Twelve bottle Thermoelectric Wine Cooler $124 Allow your wines to develop under their ideal conditions with a Sunpentown WC-12 Thermo-Electric Wine Cooler. The compact, twelve bottle capacity showcases your favorite wines with a platinum case and tinted, double paned glass. The look is very sophisticated; rather than seeing an ordinary countertop appliance, you’ll be delighted with a functional and distinctive showcase! The compact size of this wine cooler also makes it a great choice for a temporary / party bar, built-in bar, or Sunday brunch buffet. Features a digital control panel with LED temperature display and an adjustable temperature range from 46°F to 66°F. Exceptional design and function: The Sunpentown WC-12 Wine Cooler is delicately cooled by a ThermoElectric cooling system – *NO* compressor! Without the old-fashioned compressor, the excessive vibration that would stir up bottle sediment is virtually eliminated. Conveniently access your bottles with two slide out shelves, and insure stable placement of the cooler with a built-in front leveling leg. |
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WC-08 Sunpentown Eight bottle Thermoelectric Wine Cooler $102.95 Keep your chilled wines easily accessible and add a touch of gourmet decor with the Sunpentown WC-08 ThermoElectric Wine Cooler. The compact, eight bottle capacity is perfect for displaying your favorite wines – the platinum case of the unit frames the bottles behind tinted, double paned glass. The look is very sophisticated; rather than seeing an ordinary countertop appliance, you’ll be delighted with a functional and distinctive showcase! The compact size of this wine cooler also makes it a great choice for a temporary / party bar, built-in bar, or Sunday brunch buffet. Features a digital control panel with LED temperature display and an adjustable temperature range from 46°F to 66°F. Contemporary form, exceptional function: The Sunpentown WC-08 Wine Cooler is delicately cooled by a ThermoElectric cooling system – *NO* compressor! Without the old-fashioned compressor, the excessive vibration that would stir up bottle sediment is virtually eliminated. Conveniently access your bottles with two slide out shelves, and insure stable placement of the cooler with a built-in front leveling leg. |
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DWC172BL Danby 17 Bottle Countertop Wine Cooler With a Reversible Door Swing $165.99 The Danby DWC172BL countertop wine cooler protects wine at any stage and is a great alternative to refrigerator bottle cooling. It does not take up much space, but provides 17 bottles worth of storage. Compact DesignThe Danby DWC172BL countertop wine cooler features a convenient countertop design that allows 17 bottles of wine to be chilled. Reversible Door FeatureThe door on the DWC172BL wine cooler can conveniently swing left or right for easy opening. Accessory StorageIncludes a molded worktop that can be used for additional accessory storage. 3 ShelvesThere are 2 vinyl coated wire shelves and one staggered shelf inside of the wine cooler. |
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DWC1233BL-SC Danby 12 Bottle Countertop Wine Cooler With Digital Temperature Display $140.99 Keep up to 12 bottles of wine chilled at the optimal temperature with the Danby DWC1233BL-SC. This wine cooler is compact enough to sit on a table or countertop and features energy-efficient semi-conductor cooling technology that uses no ozone-depleting refrigerants. Illuminates Your WineThe Danby DWC1233BL-SC wine cooler has an interior blue LED light that gently illuminates your wine bottles so you can easily locate them. Easy to OperateThis 12 bottle wine cooler has push button controls and a digital display for easy operation. Quiet CoolingBecause the Danby DWC1233BL-SC wine cooler has a semi-conductor cooling system, it has very few moving parts. This results in silent operation and no vibration to disturb you wine. Accurate Temperature ControlThis 12 bottle countertop wine cooler has a digital thermostat for accurate temperature control. |
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SF608R Sunpentown Swamp Cooler With 3-Speed Motor $94.99 Fill your living space with cool, refreshing air without emptying your wallet. The SF608R portable swamp cooler is the affordable choice for relief from those hot, dry days. Pay much less than you would for a portable air conditioner, and enjoy all the benefits of mobility, convenience, and efficient cooling. The compact SF608R goes wherever you go on easy-glide casters. A remote control lets you effortlessly adjust settings, and a full one-year warranty gives you the confidence of knowing we’ve got you covered. |
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DWC257BL Danby 25 Bottle Wine Cooler With a Scratch Resistant Work Top $212.99 The Danby DWC257BL freestanding wine cooler keeps your reds and whites perfectly chilled. It can hold up to 25 bottles of wine. Bottles Illuminated Without HeatThe Danby DWC257BL wine cooler features an interior LED light that illuminates the wine bottles without adding heat like an incandescent bulb. Right or Left Hand OpeningA reversible hinge included on the DWC257BL wine cooler allows right or left hand door opening. Programmable Temperature RangeFeatures a programmable temperature range of 42.8° – 57.2°F. Scratch Resistant Work TopThe scratch resistant work top is an ideal place to store wine accessories. |
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MMB10 Adobe Air Swamp Cooler With 700 Sq. Ft. of Cooling Power $389.95 WHY BUY THE MMB-10 DELUXE EVAPORATIVE AIR COOLER??? How about all steel quality construction, a special sealed blower motor, a conservative 2000 CFM power rating, and up to 700 sq. ft. of cooling power. Add to that a dual sided cooling intake for more true evaporative cooling potential and a hose connection for continuous water supply. All these features make the MMB-10 the air cooler of choice for shops, businesses, and consumers that want the best possible air cooler in a relatively compact design.Perfect for home or work, our blower models are the quick, easy and affordable solution to spot cooling! The blower wheel design offers maximum air velocity for cool, quiet comfort anywhere air conditioning isn’t practical. The MMB10 Mastercool features: Convenient organizer tray top, Garden hose connector for quick hookup, and adjustable louvers for variable air distribution. This compact but powerful evaporative cooler is the perfect solution for cooling residential, commercial, agricultural and light industrial hot spots. Blower fans work where air conditioning is not practical or simply costs too much. With our premium MasterCool MMB-10, you’ll be able to affordably enjoy temperatures up to 30 degrees cooler! Cool your home, garage, patio, workshop, or business—any leisure or work area—with these “small in size, big in performance" blower models. |
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MW55 Soleus Water Cooler and Dispenser $149.95 Where do you turn when you need a refreshing glass of cold water? How about a warm, soothing cup of tea? The answer to both: the Soleus MW55 cold and hot water dispenser. Perfect for your home or office, this dispenser will make you wonder why you ever settled for tap water. Stir up a cooling powdered beverage or fix a steaming bowl of instant soup for a convenient office lunch or afternoon snack at home. And the MW55 delivers more than just water; it also features a built-in refrigerator for storing food and chilled beverages. Safety faucets automatically close when released, stopping water flow and preventing spillage. |
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Sunpentown WC-34 Wine and Beverage Cooler, chills 34 bottles $349 For wine enthusiasts that prefer a larger capacity for their cooler, consider the Sunpentown WC-34 Wine and Beverage Cooler which will hold 34 bottles! You can also choose to use the top racks for wine storage and reserve the wire basket on the bottom for other beverages. For added convenience, the doors of the Sunpentown WC34 can be reversed to open from the right or the left. The interior is softly lit and contains six slide out shelves. For added security, there is a built-in lock. Generous size and classic styling: With double pane, insulated, tinted glass doors framed in a platinum finish and a black case, the Sunpentown WC-34 wine bottle cooler will complement most decors. Features a digital control panel and display with an adjustable temperature range from 41°F to 64°F. |
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HVW18BSS Haier 18 Bottle Thermoelectric Wine Cooler With Adjustable Thermostat $165.99 Keep up to 18 bottles of your favorite wine perfectly chilled with the Haier HVW18BSS free standing wine cooler. This sleek appliance offers an economical and convenient way to cool and store wine. Its sleek tower design complements any room in your home! Soft Interior LightThe Haier HVW18BSS wine cooler has an interior light that beautifully showcases your wine without creating heat. Quiet, Vibration-Free CoolingBecause this wine refrigerator utilizes thermoelectric technology instead of a compressor, it offers near-silent, vibration-free cooling.Doubled Paned Insulated DoorThe Haier HVW18BSS has a double paned insulated door for durability. Generous Bottle CapacityAlthough this free standing wine cooler is compact, it can still hold up to 18 bottles of your favorite wine! |
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AW-180E NewAir 18 Bottle Thermoelectric Wine Cooler With Touch Screen $145.99 NEW LOW PRICE — TAKE ADVANTAGE OF THIS GREAT OFFER WHILE IT LASTS!In order to fully enjoy a bottle of wine’s true aroma, it’s important to keep it at the proper temperature, as serving it too cold will cause it to lose its flavor notes while excessively warm temperatures will speed up the aging process. However, whether you’re a budding wine connoisseur or a true oenophile, you don’t have to spend thousands of dollars building a home wine cellar. Instead, a thermoelectric wine cooler such as the NewAir AW-180E is a great,affordable way to keep your wine properly chilled. The NewAir AW-180E thermoelectric wine cooler has an eighteen bottle capacity with digital controls that make it incredibly easy to use. The LED light provides bright contrast and the touch screen on the display is intuitive and easy to control. Moreover, an internal LED light within the NewAir AW-180E wine cooler illuminates for greater visibility so that you know exactly which bottle of wine you are pulling out. In terms of sound, because the unit’s thermoelectric technology involves very little moving parts, this results in vibration-free, silent operation that won’t disturb your indoor environment. Lastly, for a touch of sophistication, the racks inside the NewAir AW-180E are chrome-plated. For an affordable, compact, and easy-to-operate thermoelectric wine cooler with a large eighteen bottle capacity, try the NewAir AW-180E. |
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SF609R Sunpentown Swamp Cooler Eith 200 Sq. Ft. of Cooling Power $99 Do hot weather and high prices have you steaming mad? Don’t sweat it—the Sunpentown SF609 portable swamp cooler offers the cooling you need without draining your wallet. The compact, easy-to-move SF609 goes where you go for room-to-room cooling in your home or workplace. A built-in air purifier removes atmospheric impurities, making this cooler the perfect choice for pet owners, families, and allergy sufferers. UL-listed for safety, the SF609 also includes a remote control for your convenience and a one-year warranty so you can enjoy your portable cooling with confidence. |
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Thermal copper pillar bump
The thermal copper pillar bump, also known as the “thermal bump”, is a thermoelectric device made from thin-film thermoelectric material embedded in flip chip interconnects (in particular copper pillar solder bumps) for use in electronics and optoelectronic packaging, including: flip chip packaging of CPU and GPU integrated circuits (chips), laser diodes, and semiconductor optical amplifiers (SOA). Unlike conventional solder bumps that provide an electrical path and a mechanical for connection to the package, thermal bumps act as solid-state heat pumps and add thermal management functionality locally on the surface of a chip or to another electrical component. The diameter of a thermal bump is 238 m (micrometres) and 60 m high.
The thermal bump uses the thermoelectric effect, which is the direct conversion of temperature differences to electric voltage and vice versa. Simply put, a thermoelectric device creates a voltage when there is a different temperature on each side, or when a voltage is applied to it, it creates a temperature difference. This effect can be used to generate electricity, to measure temperature, to cool objects, or to heat them.
For each bump, thermoelectric cooling (TEC) occurs when a current is passed through the bump. The thermal bump pulls heat from one side of the device and transfers it to the other as current is passed through the material. This is known as the Peltier effect. The direction of heating and cooling is determined by the direction of current flow and the sign of the majority electrical carrier in the thermoelectric material. Thermoelectric power generation (TEG) on the other hand occurs when the thermal bump is subjected to a temperature gradient (i.e., the top is hotter than the bottom). In this instance, the device generates current, converting heat into electrical power. This is termed the Seebeck effect.
The thermal bump was developed by Nextreme Thermal Solutions as a method for integrating active thermal management functionality at the chip level in the same manner that transistors, resistors and capacitors are integrated in conventional circuit designs today. Nextreme chose the copper pillar bump as an integration strategy due to its widespread acceptance by Intel, Amkor and other industry leaders as the method for connecting microprocessors and other advanced electronics devices to various surfaces during a process referred to as lip-chip packaging. The thermal bump can be integrated as a part of the standard flip-chip process (Figure 1) or integrated as discrete devices.
The efficiency of a thermoelectric device is measured by the heat moved (or pumped) divided by the amount of electrical power supplied to move this heat. This ratio is termed the coefficient of performance or COP and is a measured characteristic of a thermoelectric device. The COP is inversely related to the temperature difference that the device produces. As you move a cooling device further away from the heat source, parasitic losses between the cooler and the heat source necessitate additional cooling power: the further the distance between source and cooler, the more cooling is required. For this reason, the cooling of electronic devices is most efficient when it occurs closest to the source of the heat generation.
Use of the thermal bump does not displace system level cooling, which is still needed to move heat out of the system; rather it introduces a fundamentally new methodology for achieving temperature uniformity at the chip and board level. In this manner, overall thermal management of the system becomes more efficient. In addition, while conventional cooling solutions scale with the size of the system (bigger fans for bigger systems, etc.), the thermal bump can scale at the chip level by using more thermal bumps in the overall design.
Figure 1. Thermal and electrical bumps integrated on a single substrate.
A brief history of solder and flip chip/chip scale packaging
Solder bumping technology (the process of joining a chip to a substrate without shorting using solder) was first conceived and implemented by IBM in the early 60s. Three versions of this type of solder joining were developed. The first was to embed copper balls in the solder bumps to provide a positive stand-off. The second solution, developed by Delco Electronics (General Motors) in the late 60s, was similar to embedding copper balls except that the design employed a rigid silver bump. The bump provided a positive stand-off and was attached to the substrate by means of solder that was screen-printed onto the substrate. The third solution was to use a screened glass dam near the electrode tips to act as a top-off to prevent the ball solder from flowing down the electrode. By then the Ball Limiting Metallurgy (BLM) with a high-lead (Pb) solder system and a copper ball had proven to work well. Therefore, the ball was simply removed and the solder evaporation process extended to form pure solder bumps that were approximately 125m high. This system became known as the controlled collapse chip connection (C3 or C4).
Until the mid-90, this type of flip-chip assembly was practiced almost exclusively by IBM and Delco. Around this time, Delco sought to commercialize its technology and formed Flip Chip Technologies with Kulicke & Soffa as a partner. At the same time, MCNC (which had developed a plated version of IBM C4 process) received funding from DARPA to commercialize its technology. These two organizations, along with APTOS (Advanced Plating Technologies on Silicon), formed the nascent out-sourcing market.
During this same time, companies began to look at reducing or streamlining their packaging, from the earlier multi-chip-on-ceramic packages that IBM had originally developed C4 to support, to what were referred to as Chip Scale Packages (CSP). There were a number of companies developing products in this area. These products could usually be put into one of two camps: either they were scaled down versions of the multi-chip on ceramic package (of which the Tessera package would be one example); or they were the streamlined versions developed by Unitive Electronics, et al. (where the package wiring had been transferred to the chip, and after bumping, they were ready to be placed).
One of the issues with the CSP type of package (which was intended to be soldered directly to an FR4 or flex circuit) was that for high-density interconnects, the soft solder bump provided less of a stand-off as the solder bump diameter and pitch were decreased. Different solutions were employed including one developed by Focus Interconnect Technology (former APTOS engineers), which used a high aspect ratio plated copper post to provide a larger fixed standoff than was possible for a soft solder collapse joint.
Today, flip chip is a well established technology and collapsed soft solder connections are used in the vast majority of assemblies. Interestingly, the copper post stand-off developed for the CSP market has found a home in high-density interconnects for advanced micro-processors and is used today by IBM for its CPU packaging.
Copper pillar solder bumping
Recent trends in high-density interconnects have led to the use of copper pillar solder bumps (CPB) for CPU and GPU packaging. CPBs are an attractive replacement for traditional solder bumps because they provide a fixed stand-off independent of pitch. This is extremely important as most of the high-end products are underfilled and a smaller standoff may create difficulties in getting the underfill adhesive to flow under the die.
Figure 2 shows an example of a CPB fabricated by Intel and incorporated into their Presler line of microprocessors among others. The cross section shows copper and a copper pillar (approximately 60 um high) electrically connected through an opening (or via) in the chip passivation layer at the top of the picture. At the bottom is another copper trace on the package substrate with solder between the two copper layers.
Figure 2. Intel Presler copper pillar solder bump.
Thin-film thermoelectric technology
Thin films are thin material layers ranging from fractions of a nanometer to several micrometers in thickness. Thin-film thermoelectric materials are grown by conventional semiconductor deposition methods and fabricated using conventional semiconductor micro-fabrication techniques.
Thin-film thermoelectrics have been demonstrated to provide high heat pumping capacity that far exceeds the capacities provided by traditional bulk pellet TE products. The benefit of thin-films as compared to bulk materials for thermoelectric manufacturing is expressed in Equation 1. Here the Qmax (maximum heat pumped by a module) is shown to be inversely proportional to the thickness of the film, L.
Eq. 1
As such, TE coolers manufactured with thin-films can easily have 10x 20x higher Qmax values for a given active area A. This makes thin-film TECs ideally suited for applications involving high heat-flux flows. In addition to the increased heat pumping capability, the use of thin films allows for truly novel implementation of TE devices. Instead of a bulk module that is 1-3 mm in thickness, a thin-film TEC can be fabricated less than 100 um in thickness.
In its simplest form, the P or N leg of a TE couple (the basic building block of all thin-film TE devices) is a layer of thin-film TE material with a solder layer above and below, providing electrical and thermal functionality.
Thermal copper pillar bump
The thermal bump is compatible with the existing flip-chip manufacturing infrastructure, extending the use of conventional solder bumped interconnects to provide active, integrated cooling of a flip-chipped component using the widely accepted copper pillar bumping process. The result is higher performance and efficiency within the existing semiconductor manufacturing paradigm. The thermal bump also enables power generating capabilities within copper pillar bumps for energy recycling applications.
Thermal bumps have been shown to achieve a temperature differential of 60 C between the top and bottom headers; demonstrated power pumping capabilities exceeding 150 W/cm2; and when subjected to heat, have demonstrated the capability to generate up to 10 mW of power per bump.
Thermal copper pillar bump structure
Figure 3 shows an SEM cross-section of a TE leg. Here it is demonstrated that the thermal bump is structurally identical to a CPB with an extra layer, the TE layer, incorporated into the stack-up. The addition of the TE layer transforms a standard copper pillar bump into a thermal bump. This element, when properly configured electrically and thermally, provides active thermoelectric heat transfer from one side of the bump to the other side. The direction of heat transfer is dictated by the doping type of the thermoelectric material (either a P-type or N-type semiconductor) and the direction of electrical current passing through the material. This type of thermoelectric heat transfer is known as the Peltier effect. Conversely, if heat is allowed to pass from one side of the thermoelectric material to the other, a current will be generated in the material in a phenomenon known as the Seebeck effect. The Seebeck effect is essentially the reverse of the Peltier effect. In this mode, electrical power is generated from the flow of heat in the TE element. The structure shown in Figure 3 is capable of operating in both the Peltier and Seebeck modes, though not simultaneously.
Figure 3. Cross sectional view of Nextreme thermal copper pillar bump.
Figure 4 shows a schematic of a typical CPB and a thermal bump for comparison purposes. These structures are similar, with both having copper pillars and solder connections. The primary distinction between the two is the introduction of either a P- or N-type thermoelectric layer between two solder layers. The solders used with CPBs and thermal bumps can be any one of a number of commonly used solders including, but not limited to, Sn, SnPb eutectic, SnAg or AuSn.
Figure 4. Schematic showing traditional CPB next to a P-type and N-type pillar bump. The P- and N-type bumps together make up a P/N couple that, when connected in series electrically, provides for either Peltier cooling or Seebeck power generation.
Figure 5 shows a device equipped with a thermal bump. The thermal flow is shown by the arrows labeled eat. Metal traces, which can be several micrometres high, can be stacked or interdigitated to provide highly conductive pathways for collecting heat from the underlying circuit and funneling that heat to the thermal bump.
Figure 5. Close-up schematic showing flow of heat through a thermal bump. Also shown are the multi-layer metal traces often used in complex integrated circuits. These metal layers can be beneficial for gathering heat from larger areas and funneling it into the thermal bump, reducing the thermal constriction resistance in the circuit. A thermal via is shown in the printed wire board for improved heat rejection path.
The metal traces shown in the figure for conducting electrical current into the thermal bump may or may not be directly connected to the circuitry of the chip. In the case where there are electrical connections to the chip circuitry, on-board temperature sensors and driver circuitry can be used to control the thermal bump in a closed loop fashion to maintain optimal performance. Second, the heat that is pumped by the thermal bump and the additional heat created by the thermal bump in the course of pumping that heat will need to be rejected into the substrate or board. Since the performance of the thermal bump can be improved by providing a good thermal path for the rejected heat, it is beneficial to provide high thermally conductive pathways on the backside of the thermal bump. The substrate could be a highly conductive ceramic substrate like AlN or a metal (e.g., Cu, CuW, CuMo, etc.) with a dielectric. In this case, the high thermal conductance of the substrate will act as a natural pathway for the rejected heat. The substrate might also be a multilayer substrate like a printed wiring board (PWB) designed to provide a high-density interconnect. In this case, the thermal conductivity of the PWB may be relatively poor, so adding thermal vias (e.g. metal plugs) can provide excellent pathways for the rejected heat.
Applications
Thermal bumps can be used in a number of different ways to provide chip cooling and power generation.
General cooling
Thermal bumps can be evenly distributed across the surface of a chip to provide a uniform cooling effect. In this case, the thermal bumps may be interspersed with standard bumps that are used for signal, power and ground. This allows the thermal bumps to be placed directly under the active circuitry of the chip for maximum effectiveness. The number and density of thermal bumps are based on the heat load from the chip. Each P/N couple can provide a specific heat pumping (Q) at a specific temperature differential (T) at a given electrical current. Temperature sensors on the chip (n board sensors) can provide direct measurement of the thermal bump performance and provide feedback to the driver circuit.
Precision temperature control
Since thermal bumps can either cool or heat the chip depending on the current direction, they can be used to provide precision control of temperature for chips that must operate within specific temperature ranges irrespective of ambient conditions. For example, this is a common problem for many optoelectronic components.
Hotspot cooling
In microprocessors, graphics processors and other high-end chips, hotspots can occur as power densities vary significantly across a chip. These hotspots can severely limit the performance of the devices. Because of the small size of the thermal bumps and the relatively high density at which they can be placed on the active surface of the chip, these structures are ideally suited for cooling hotspots. In such a case, the distribution of the thermal bumps may not need to be even. Rather, the thermal bumps would be concentrated in the area of the hotspot while areas of lower heat density would have fewer thermal bumps per unit area. In this way, cooling from the thermal bumps is applied only where needed, thereby reducing the added power necessary to drive the cooling and reducing the general thermal overhead on the system.
Power generation
In addition to chip cooling, thermal bumps can also be applied to high heat-flux interconnects to provide a constant, steady source of power for energy scavenging applications. Such a source of power, typically in the mW range, can trickle charge batteries for wireless sensor networks and other Battery Operated systems.
References
^ a b D.M. Rowe, ed. CRC Handbook of Thermoelectrics. Boca Raton, CRC Press, 1994
^ J. Kloeser and E. Weibach, igh-Performance Flip Chip Packages with Copper Pillar Bumping, Global SMT & Packaging, May 2006.
^ G.J. Snyder, M. Soto, R. Alley, D. Koester, B. Conner, ot Spot Cooling using Embedded Thermoelectric Coolers, Proc. 22nd IEEE Semi-Therm Symp., 2006.
^ A. Bar-Cohen, University of Maryland, nhanced Thermoelectric Cooler for On-Chip Hot Spot Cooling presentation, IntePACK07: ASME/Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS, and NEMS, July 8-12, 2007.
External links
Kulicke & Soffa
MCNC
Aptos Technology
Nextreme Thermal Solutions
Categories: Electronics manufacturing | Semiconductors | Thermodynamics
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