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A defrost thermostat opens the heater circuit when the evaporator temperature rises above a preset temperature, 40°F (5°C) or more, thereby preventing excessive heating of the freezer compartment. The defrost timer is such that either the compressor or the defrost heater is on, but not both at the same time.
The company name Hotpoint comes from the hot point of the innovative first electric iron. Invented by American, Earl Richardson (1871–1934) in 1905, he subsequently formed his Pacific Electric Heating Co. in Ontario, California, in 1906. [2] [3] The device became known as the Hotpoint iron, with its hottest point at the front and not the center.
Temperature settings for refrigerator and freezer compartments are often given arbitrary numbers by manufacturers (for example, 1 through 9, warmest to coldest), but generally 3 to 5 °C (37 to 41 °F) [3] is ideal for the refrigerator compartment and −18 °C (0 °F) for the freezer. Some refrigerators must be within certain external ...
A thermostat exerts control by switching heating or cooling devices on or off, or by regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. A thermostat can often be the main control unit for a heating or cooling system, in applications ranging from ambient air control to automotive coolant control.
[2] [4] The company is considered to be a leading producer within the cooling and refrigeration technology market. [5] [6] [7] The area of refrigeration and deep freezers for supermarkets basically involves plug-in refrigeration and freezer systems [8] and constitutes approximately 60% of the total turnover, which was more than €200 million ...
A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible.A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator.