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Low-temperature heat pump air conditioner and automatic defrosting method

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

Inactive Publication Date: 2007-01-03
HAIER GRP CORP +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] The heat pump air conditioner using the current automatic defrosting technology adopts two methods: regular defrosting or constant temperature defrosting. 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

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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

This invention is a kind of low temperature heat pump air conditioner and its automatic defrosting method. It includes: gas-liquid separator; compressor; evaporator; condenser; outer coiled pipe temperature sensor arranged on the said condenser; environmental temperature sensor which is assembled near the air intake side cooling fin of the said condenser; upper heating zone and lower heating zone which are arranged on the gas-liquid separator; insulating heat preservation layer which envelops the outer layer of gas-liquid separator. During the heating process of the said low temperature heat pump air conditioner, the non-frosting operation of condenser can be achieved by compensating the degree of superheat of refrigerants. This invention can keep relative stable heat exchanging temperature difference and makes it between within 1.5DEG C-3DEG C. Thus, it achieves that the condenser does not frost when the temperature is low and the relative humidity is lower than 80%.

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 Applications(China)
IPC IPC(8): F25B47/00
Inventor 张晓兰赵振立崔国宝
Owner HAIER GRP CORP
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