Waste heat recovery type heat pump heat management device for new energy automobile

Abstract

The invention discloses a waste heat recovery type heat pump heat management device for a new energy automobile, and relates to the technical field of heat management devices of new energy automobiles. The device comprises an electric compressor, one end of the electric compressor is connected with one end of a first three-way valve, the other end of the electric compressor is connected with a gas-liquid separator, the other end of the first three-way valve is connected with one end of an outdoor heat exchanger, an evaporator and a plate heat exchanger are arranged between the outdoor heat exchanger and the gas-liquid separator in parallel; the evaporator is connected with a thermal expansion valve and a third two-way valve in series, and the plate heat exchanger is connected with a first electronic expansion valve in series, and a second electronic expansion valve and a first two-way valve are arranged on a pipeline between the outdoor heat exchanger and the first electronic expansion valve in parallel. According to the waste heat recovery type heat pump heat management device, the waste heat of electric control of the motor is fully utilized, the electric control of the passenger compartment, the motor and the battery can be carried out at the same time, the working temperature lower limit of the heat pump is effectively reduced, the energy consumption of the battery is saved, and the cruising mileage of the whole vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of thermal management devices for new energy vehicles. Background technique [0002] With the improvement of environmental protection requirements and the improvement of battery technology, the development speed of electric vehicles is getting faster and faster, and they are gradually replacing traditional fuel vehicles and becoming an important development direction of the modern automobile industry. more and more important. At present, the heating and battery heating of electric vehicles mainly adopt electric heating or heat pump solutions. The efficiency of electric heating is low, the cruising range of electric vehicles is greatly reduced, the lower limit of the working temperature of the heat pump is high, and it is greatly affected by the environment. At the same time, the waste heat emitted by the electric motor and electronic control cannot be fully utilized, resulting in a large waste. How to mor...

AI Technical Summary

Problems solved by technology

This kind of thermal management system consumes a lot of battery power in the winter environment, and the loss of battery life is relatively large.

[0004] Some electric vehicles have adopted the heat pump system to realize the heating function of the passenger compartment, but the lower limit of the ambient temperature used is relatively high. When the ambient temperature is low, PTC is still required for auxiliary heating, and the recovery of waste heat from the electric control circuit of the motor is not considered.

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