There can be a shortage of electrical capacity when everyone in the world has a home conditioner. New electronics may mitigate the problem. Energy efficiency in appliances is becoming a hot topic. Several countries have now enacted legislation aimed at boosting the efficiency of products such as clothes washers, water heaters, and in particular air conditioners. Air conditioners are a special target because they are becoming more popular in Japan, Europe, and emerging countries such as China and India. In the U.S., for example, the Dept. of Energy recently issued energy-efficiency standards for numerous appliance products. Similar initiatives have been in force in Europe and Japan. In this regard, the residential air-conditioning market (about 35 million units manufactured worldwide) is by its nature a "high-impact product" for energy-efficiency programs. An air conditioner must have a SEER of at least 10 to be sold in the U.S. Higher efficiency models have a SEER of 11, 12, 13 or 14. (SEER is Seasonal Energy Efficiency Rating. It is the most commonly used measure of the efficiency of consumer central-airconditioning systems. EER, or Energy Efficiency Rating, is the most commonly used measure of efficiency for commercial air-conditioning systems.) U.S. legislation on air conditioners and heat pumps establishes more stringent minimum efficiency standards that become effective January 23, 2006. These standards are tough to hit without the use of advanced technology and are quite challenging for manufacturers. Without the use of more advanced electronic technology these standards may be potentially impractical. Such technology includes variable-speed drives powering either a standard ac induction or brushless dc compressor. Modern air conditioners incorporate power factor correction (PFC) to meet ever-more stringent efficiency standards. New circuits combine PFC with rectification to help
Products & Services
Enclosure Air Conditioners
Enclosure air conditioners remove the heat generated by electronic devices from the inside of cabinets or enclosures.
Air conditioners and building air conditioners are used in industrial, process computing, networking, and other spaces where thermal management is important. Space and spot cooling equipment are used wherever total heat must be controlled or where localized heat sources must be managed. Many refrigerants are used in air conditioners; CFC-free refrigerants are becoming more prevalent and in fact are required in many applications.
Signal Conditioning Chips
Signal conditioner chips are data acquisition devices that refine sensor outputs so that they can be read by computer boards or other IC devices.
Power or Line Conditioners
Power or line conditioners regulate, filter, and suppress noise in AC power for sensitive computer and other solid state equipment.
Heat pumps are reverse cycle air conditioners. They use a compression cycle system to supply heat or remove heat from a temperature-controlled space.
Topics of Interest
The road to energy efficient HVAC may lead to variablespeed compressor technology and new electronics to drive it. Most engineers know that heating, ventilation, and air conditioning (HVAC) systems...
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Energy efficiency and power quality standards are driving the use of solutions, such as, PFC technology and creative magnetic component designs. Examples include the European Distortion Requirements,...