Spraying synergy electric car heat pump system

Abstract

The invention discloses a spraying synergy electric car heat pump system. The spraying synergy electric car heat pump system comprises a compressor; a refrigerant outlet of the compressor is connectedwith a first port of a first four-way valve; a second port of the first four-way valve is connected with one end of a first bypass valve, one end of a first capillary tube throttling device and one end of a fourth bypass valve; a third port of the first four-way valve is connected with one end of an expansion valve; a fourth port of the first four-way valve is connected with one end of a third bypass valve, one end of a second capillary tube throttling device and a main ejection opening of a second sprayer; the other end of the fourth bypass valve is connected with a main ejection opening ofa first sprayer; an ejected opening of the first sprayer is connected with the other end of a third capillary tube throttling device and the other end of a second bypass valve; and an outlet of the first sprayer is connected with one end of a second heat exchanger. By arranging the two two-phase flow sprayers, expansion work can be recovered both under the heating working condition and under the refrigerating working condition, the heating efficiency is ensured, and the coefficient of performance (COP) of the heat pump system is improved.

Description

Technical field [0001] The invention relates to the technical field of heat pumps for electric vehicles, and in particular to a heat pump system for injection-enhancing electric vehicles. Background technique [0002] At present, with the improvement of the socio-economic level, the number of vehicles per capita in the world has increased, and automobiles have brought about aggravation of exhaust pollution and rapid increase in resource consumption. Humans are increasingly paying attention to the environment and worrying about the existing resources, making electric vehicles gradually become a future substitute An important category of traditional fuel vehicles. [0003] However, for current electric vehicles, the mileage problem is the biggest barrier in the implementation of electric vehicles. In order to solve the mileage problem of electric vehicles, reducing the energy consumption of batteries in electric vehicles has become the preferred method. [0004] The energy management ...

AI Technical Summary

Problems solved by technology

[0006] However, for the existing electric vehicle heat pump system, when the external ambient temperature is low, the heating efficiency of the heat pump system drops sharply and the heating capacity is insufficient.

At the same time, because the evaporation pressure of the refrigerant in the heat pump system is too low, the compression ratio of the heat pump system will be increased, thereby increasing the temperature of the exhaust gas, which may cause reliability problems of the compressor

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