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Low-temperature heat pump air conditioner and automatic defrosting method

A low-temperature heating and air-conditioning technology, applied in lighting and heating equipment, refrigerators, damage protection, etc., can solve the problems of energy waste and affecting the heating effect of heat pumps, and achieve the effect of saving electric energy and good heating effect

Inactive Publication Date: 2009-11-25
HAIER GRP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This defrosting technology is realized by switching the four-way reversing valve to make the heat pump enter the cooling operation state, which affects the overall heating effect of the heat pump and causes energy waste

Method used

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  • Low-temperature heat pump air conditioner and automatic defrosting method

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Embodiment Construction

[0028] The low-temperature heat pump air conditioner of the present invention is generally used for air-cooled low-temperature heat pump air conditioners. Its outdoor unit is a DC frequency conversion one-drag-one unitized outdoor unit. Free matching, generally 2P outdoor units use capillary throttling, and 3P and above outdoor units use expansion valve throttling. and thermal insulation cotton, and increase the switch and load control of the heating belt in the computer board of the outdoor unit. The heating belt is wrapped around the middle and lower part of the gas-liquid separator through the connecting spring. The use of the heating belt can increase the suction temperature of the compressor, compensate for the insufficient superheat achieved by the heat exchanger, and at the same time facilitate the work of the gas-liquid separator . The use of thermal insulation cotton ensures that the heat generated by the heating belt can effectively heat the gas-liquid separator and...

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Abstract

The invention relates to a low-temperature heat pump air conditioner and its automatic defrosting method, which mainly includes a vapor-liquid separator, a compressor, an evaporator and a condenser, and the outer coil temperature sensor installed on the condenser is installed on the The ambient temperature sensor near the heat sink on the air inlet side of the condenser, the upper heating belt and the lower heating belt on the gas-liquid separator, and the heat insulation layer wrapped around the outer layer of the gas-liquid separator. During the heating process of the low-temperature heat pump air conditioner, the non-frost operation of the condenser is realized through the method of compensating the superheat degree of the refrigerant. Using the low-temperature heat pump air conditioner of the present invention can maintain a relatively stable heat exchange temperature difference, and keep it between 1.5°C and 3°C, so that the condenser does not frost when the relative humidity is below 80% in a low-temperature environment, The air conditioner always maintains a stable heating operation process, saves electric energy, and has a good heating effect.

Description

technical field [0001] The invention relates to a low-temperature heat pump air conditioner and an automatic defrosting method thereof, in particular to a low-temperature heat pump air conditioner and an automatic defrosting method for compensating superheat and preventing frosting of a condenser. Background technique [0002] At present, when the general heat pump air conditioner enters the heating work in winter, the heating effect drops rapidly as the external ambient temperature drops. The reason is that when the low-temperature and low-pressure gas (gasified refrigerant) in the gas-liquid separator is sucked into the compressor, it is compressed by the compressor, and the low-temperature and low-pressure gas is transformed into a high-temperature and high-pressure gas, which enters the heating cycle under the control of the four-way valve. . In the heating cycle, the high-temperature and high-pressure gas enters the indoor unit condenser (evaporator in the cooling proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B47/00
Inventor 张晓兰赵振立崔国宝
Owner HAIER GRP CORP
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