Air conditioning heat pump system provided with cooling liquid loop for new energy automobile

Abstract

The invention discloses an air conditioning heat pump system provided with a cooling liquid loop for a new energy automobile. The system comprises a heat pump system and a cooling liquid loop system, wherein the heat pump system comprises an electric compressor, an external heat exchanger, a plate type heat exchanger, an internal evaporator, an internal heat exchanger, a gas-liquid separator, a first electric expansion valve, a second electric expansion valve, a normally-opened solenoid valve, a normally-closed solenoid valve, an one-way check valve and connecting pipelines; the electric compressor is correspondingly connected to the external heat exchanger and the plate type heat exchanger through the normally-opened solenoid valve and the normally-closed solenoid valve; the external heat exchanger is connected with the internal evaporator through the second electric expansion valve; the internal heat exchanger is connected with the plate type heat exchanger; the gas-liquid separator is arranged in front of the electric compressor; the cooling liquid loop system comprises a cooling liquid pump, a cooling liquid expansion water tank, a PTC electric heater and connecting pipelines; the heat pump system runs in a refrigerating mode, a heating mode and a dehumidifying mode by adjusting the normally-opened solenoid valve and the normally-closed solenoid valve to open and close.

Description

technical field [0001] The invention relates to the field of automobile air conditioners, in particular to an air conditioner heat pump system for new energy automobiles with a cooling circuit. Background technique [0002] The energy crisis and the increasingly serious environmental pollution have already become global problems. The use of new energy instead of traditional fossil fuels is an inevitable trend of national development. The air conditioning system is an important factor to improve the comfort of new energy vehicles. It can be adjusted according to different situations. To adjust the temperature inside the car, the air conditioning system is mainly used for cooling, heating and dehumidification. The air conditioning system of new energy vehicles mainly uses electric power and hybrid power as energy consumption. However, since the electric capacity of new energy vehicles is fixed, the waste heat of the engine cannot be used for effective heating. The energy consu...

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Problems solved by technology

[0005]Because the environment of the vehicle is relatively complicated, and the technology of the four-way reversing valve for vehicles is still not very mature, the heat pump system cannot be guaranteed in the low temperature environment or when the system fails. Normal heating

At the same time, during the dehumidification process, the introduced air passes through the evaporator inside the car, the air temperature will be greatly reduced, and then heated by the condenser inside the car, which will lead to a decrease in the temperature of the outlet air and affect the heating effect, which will further force Air-conditioning heat pump systems for new energy vehicles need better solutions

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