Vehicle heat pump air conditioner with pressure sensors

Abstract

The invention discloses a vehicle heat pump air conditioner with pressure sensors. The vehicle heat pump air conditioner comprises an air supplementation compressor. The air supplementation compressor is connected with a vehicle exterior heat exchanger by a four-way valve, the vehicle exterior heat exchanger is connected with a plate heat exchanger by check valves, the other end of the plate heat exchanger is connected with a main-way electronic valve, the other end of the main-way electronic valve is connected with check valves, the corresponding check valve is connected with a vehicle interior heat exchanger, and the vehicle interior heat exchanger is connected with the air supplementation compressor by the four-way valve; a group of pressure sensors and temperature sensors matched with the pressure sensors are arranged at an exhaust opening and an air inlet of the air supplementation compressor respectively. Compared with the prior art, the vehicle heat pump air conditioner has the advantages that the pressure sensors and the temperature sensors are matched with one another, accordingly, the air inlet and exhaust temperatures of the air supplementation compressor can be monitored, the refrigerant circulation volumes can be controlled according to monitoring results, and the vehicle heat pump air conditioner can reliably and stably run in high-temperature or alpine regions; the pressures of systems further can be monitored by the pressure sensors in real time, conditions that whether refrigerants of the systems leak or not, whether the systems are blocked or not and the like can be judged, and accordingly normal running of the systems can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of heat pump air conditioners for vehicles, and in particular relates to a heat pump air conditioner for vehicles using a pressure sensor. Background technique [0002] With the country's vigorous subsidies and promotion of new energy vehicles, the market share of existing pure electric buses is getting higher and higher. Since there is no waste heat from the fuel of traditional vehicles, they can only rely on air-conditioning units or PTCs to heat the compartments in winter. However, in the alpine region, the heating capacity of ordinary heat pump units is obviously insufficient, and the heat exchange efficiency of PTC is low, which affects the cruising range of the vehicle. On the other hand, the existing electronic valve uses exhaust temperature control to adjust the flow of refrigerant. If the system leaks or is not matched properly during winter operation, the system is prone to return gas with liquid, ...

AI Technical Summary

Problems solved by technology

[0002] With the country's vigorous subsidies and promotion of new energy vehicles, the market share of existing pure electric buses is getting higher and higher. Since there is no waste heat from the fuel of traditional vehicles, they can only rely on air-conditioning units or PTCs to heat the compartments in winter. However, in alpine regions, the heat supply capacity of ordinary heat pump units is obviously insufficient, and the heat transfer efficiency of PTC is low, which affects the cruising range of the vehicle.

On the other hand, the existing electronic valve uses exhaust temperature control to adjust the flow of refrigerant. If the system leaks or is not matched properly during winter operation, it is easy to cause the system to return to the gas with liquid, the system to frost, and even the compressor to hit the liquid. , so that the system cannot operate normally

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