Automobile heat pump heating system and method combining battery cooler and motor waste heat

Abstract

The invention discloses an automobile heat pump heating system and method combining a battery cooler and motor waste heat, which belong to the technical field of automobile air conditioners. The system comprises a compressor, a water-cooled condenser, an external condenser, a battery cooler and a gas-liquid separator, wherein the compressor is respectively connected with the water-cooled condenserand the gas-liquid separator; a first stop valve and a first electronic expansion valve which are arranged in parallel are arranged between the water-cooled condenser and the external condenser; theexternal condenser is connected with the gas-liquid separator through a fourth stop valve; the external condenser is further connected with the gas-liquid separator through a third stop valve, a firstthermostatic expansion valve and a battery cooler which are sequentially arranged; and the water-cooled condenser is further connected between the third stop valve and the first thermostatic expansion valve through a fifth stop valve. By adopting the battery cooler and utilizing the waste heat of the motor, the heating performance of the heat pump can be improved, the heat pump can be used for defrosting an external condenser, parts are reduced, the system is simpler, the layout is more compact, the control process is simplified, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of automobile air-conditioning, and in particular relates to an automobile heat pump heating system and method combining battery coolers and motor waste heat, which are suitable for heat pump air-conditioning systems of electric vehicles and hybrid vehicles. Background technique [0002] The main function of the battery cooler of the existing electric and hybrid vehicle heat pump air conditioner is: when the battery needs to be cooled, the battery cooler is used as an evaporator to cool the battery. However, when using a heat pump for heating in winter, if it is necessary to use the waste heat of the motor for evaporation, to improve the heating performance of the heat pump or to defrost the external condenser, it is necessary to add components such as a waste heat recovery device and an electronic expansion valve, that is: when When the heat pump air-conditioning system runs the heat pump heating cycle, the...

AI Technical Summary

Problems solved by technology

However, when using a heat pump for heating in winter, if it is necessary to use the waste heat of the motor for evaporation, to improve the heating performance of the heat pump or to defrost the external condenser, it is necessary to add components such as a waste heat recovery device and an electronic expansion valve, that is: when When the heat pump air-conditioning system runs the heat pump heating cycle, the refrigerant cycle is first compressed by the compressor, then enters the water-cooled condenser to condense, and then divides into two circuits. The gas-liquid separator returns to the compressor, and the other path goes through the second electronic expansion, enters the waste heat recovery device to evaporate, and then flows through the gas-liquid separator through the fourth cut-off valve and returns to the compressor; when the heat pump air conditioning system runs heat pump heating When defrosting is needed after circulating and frosting on the external condenser, the refrigerant cycle is compressed b

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