Residual heat pump air conditioner system for fuel-cell vehicle

Abstract

The invention relates to a residual heat pump air conditioning system for fuel cell vehicle, which belongs to the technical field of the air conditioner for fuel cell vehicle. The invention is characterized in that the residual heat pump air conditioning system comprises a refrigerating circuit and a heating circuit, the refrigerating circuit and the heating circuit are connected with a compressor via a four-way valve, an inlet of the four-way valve is connected with an outlet of the compressor, a first outlet and a second outlet of the four-way valve are connected with the refrigerating circuit and the heating circuit, and a third outlet of the four-way valve is connected with the inlet of the compressor via a gas-liquid separator; the heating circuit comprises an external evaporator, the heat side of the external evaporator is connected in a cooling circuit of the fuel cell and the cool side is connected in the heating circuit; the cooling circuit of the fuel cell also comprises an electric control three-way valve, one end of which is connected with the fuel cell via a water pump and a second end and a third end respectively are connected with the inlet and the outlet at the heat side of the external evaporator. The air conditioning system can use the residual heat of the fuel cell for heat supply and has the advantages of energy saving, simple structure and wide adaptability to use area, etc.

Description

technical field [0001] A waste heat heat pump air-conditioning system for a fuel cell vehicle belongs to the technical field of heating and cooling air-conditioning for a fuel cell vehicle. Background technique [0002] The cooling of traditional cars in summer is solved by single-cooling air conditioners, and the heating in winter is realized by using the engine cooling water or exhaust with a higher temperature. Fuel cell engines in fuel cell vehicles have a lot of waste heat, but the temperature is low, so it is difficult to meet the comfort requirements when directly used for heating. The current fuel cell vehicles use electric vapor compression air conditioners to achieve cooling, and direct electric heating to achieve heating. Two sets of systems Independent, and the electric energy consumed by heating in winter is too much, which seriously affects the power and economy of the vehicle. Therefore, if the fuel cell waste heat can be used for heating, and a system can be...

AI Technical Summary

Problems solved by technology

This patent application improves the adaptability of the heat pump water heater to seasonal changes by using the waste heat of the air discharged from the fuel cell, and recovers a part of the waste heat of the fuel cell. The disadvantages: 1) It only provides hot water, and does not have the function of cooling, heating and air conditioning

2) Not suitable for automotive HVAC

3) The heat transfer efficiency is low when the air discharged from the fuel cell radiator is used as the heat source of the heat pump water heater

[0004] The patent application "Heat Pump Air Conditioning System for Electric Vehicles (Publication No. CN 1709734A, published on December 21, 2005)" proposes a heat pump air conditioning system for vehicles with a simple structure, but does not use the waste heat of fuel cells, and because the air source heat pump system is used, When heating in winter, it will be greatly affected by the temperature outside the car, and the efficiency will be low. In the cold regions of northern my country, it may not work normally.

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