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Variable refrigerant flow ( VRF ), also known as variable refrigerant volume ( VRV ), is an HVAC technology invented by Daikin Industries, Ltd. in 1982. [ 1] Similar to ductless mini-split systems, VRFs use refrigerant as the primary cooling and heating medium, and are usually less complex than conventional chiller -based systems.
Hisense Group is a Chinese multinational major appliance and electronics manufacturer headquartered in Qingdao, Shandong Province, China. [ 2] Televisions are the main products of Hisense, and it is the largest TV manufacturer in China by market share since 2004. [ 3]
www.kelon.com. Hisense Kelon or simply Kelon, formerly known as Guangdong Kelon Electrical Holdings Company Limited, [ 1] is one of the largest Chinese manufacturers of white goods, producing refrigerators, air conditioners, and small electric appliances. The company is well known in mainland China under its brand names Kelon ( 科龙) and ...
A defrost timer taken out of a household refrigerator. The defrost mechanism in a refrigerator heats the cooling element (evaporator coil) for a short period of time and melts the frost that has formed on it. [ 1] The resulting water drains through a duct at the back of the unit. Defrosting is controlled by an electric or electronic timer.
Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [ 1]
The Einstein–Szilard or Einstein refrigerator is an absorption refrigerator which has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly invented in 1926 by Albert Einstein and his former student Leó Szilárd, who patented it in the U.S. on November 11, 1930 ( U.S. patent 1,781,541 ).
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