A heat pump air conditioner for electric vehicles

Abstract

The invention relates to a heat pump air conditioner for electric vehicles, which is characterized in that it comprises: a compressor (1) connected to an outdoor heat exchanger (3) and an indoor heat exchanger (4) through a first four-way valve (2) ), the outdoor heat exchanger is connected to the second four-way valve (7) through the first expansion valve (5) and the first one-way valve (6), and the second four-way valve is connected to the second expansion valve (14) and the second The one-way valve (13) is connected to the heat exchanger (4) in the vehicle interior, and the flash evaporator (12) is connected through the dry filter (8), the third expansion valve (9) and the solenoid valve (10), and the flash evaporator passes through the fourth unit Connect the compressor to valve (19). Advantages of the present invention: the device has a simple structure and low cost, and the flow direction of the refrigerant in the system and the on-off of each pipeline are controlled by the combination of the four-way reversing valve and the one-way valve, so as to realize the purpose of the two-way expansion valve, so that The expansion valve works safely and reliably, and the parts used are of good versatility, which is convenient for maintenance and repair.

Description

technical field [0001] The invention relates to an air conditioner, in particular to a heat pump air conditioner for electric vehicles. Background technique [0002] With the progress of society and the continuous development of science and technology, people pay more and more attention to the comfort of the car environment. For this reason, people have researched and developed the car air conditioning and ventilation system. However, the current automotive air-conditioning and ventilation systems are generally limited to cooling and ventilation in hot summer, and the engine cooling water with a higher temperature is used to heat the air in winter to meet the comfort requirements in the car interior. Traditional internal-combustion engine vehicles heat the air in the cabin through the waste heat of the engine, and at the same time directly use the engine power to directly drive the air-conditioning compressor to cool in summer. Electric vehicles do not have an engine, so th...

AI Technical Summary

Problems solved by technology

Therefore, the electric vehicle air-conditioning system needs to cost-effectively provide a comfortable driving environment for the vehicle interior with the minimum consumption. After extensive searching, no ideal technical solution has been found yet.

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