Heat pump type air-cooled air conditioner utilizing compressor waste heat

Abstract

The heat pump type air-cooled air conditioner utilizing the afterheat of compressor includes mainly refrigerant loop comprising compressor, outdoor heat exchanger, throttle unit and indoor heat exchanger; and outdoor blower capable of changing its rotation direction in winter. In winter and while the room is heated, the outdoor blower rotates in reverse direction, so that air from outdoor flows first through the compressor to exchange heat with the compressor casing to raise temperature and then through outdoor heat exchanger to exchange heat with refrigerant. The present invention recoversthe heat of compressor to raise the air intake temperature, improve the low temperature working performance of the air conditioner and the winter operation performance of the air conditioner.

Description

Technical field: [0001] The invention relates to a heat pump type air-cooled air conditioner, in particular to a heat pump type air-cooled air conditioner which utilizes waste heat of a compressor to improve heating capacity under low temperature conditions, and belongs to the technical field of refrigeration and air conditioning. Background technique: [0002] Heat pump air conditioners are used for cooling in summer and heating in winter, which is an energy-saving heating method. However, when the ambient temperature is lower than 5°C, the outdoor evaporator of the air-cooled air conditioner is prone to frost, resulting in deterioration of heat transfer performance. Therefore, when the air conditioner operates in the heating mode for a period of time, it must switch to the cooling mode through the four-way reversing valve for defrosting. After reversing, the original outdoor heat exchanger is changed from an evaporator to a condenser, and the high-temperature refrigerant ...

AI Technical Summary

Problems solved by technology

[0003] Because (1) part of the heat is directly discharged to the environment through the compressor casing during the compression process; (2) the air conditioner will cause heat loss and increase the power consumption of the compressor during defrosting operation, which largely restricts The coefficient of performance of the air conditioner during winter operation may even cause the heating efficiency of the air conditioner to be lower than that of electric heating and no longer save energy.

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