Vehicle-mounted air conditioning system integrated with battery cooling function

Abstract

The invention provides a vehicle-mounted air conditioning system integrated with a battery cooling function, which comprises a compressor, a condenser, an evaporator, a throttle valve and a vapor-liquid separator which are connected through a refrigeration pipeline, fans are arranged at the evaporator and the condenser, and the trend of a refrigerant from the compressor is controlled by a four-way valve. A double-pipe heat exchanger for cooling a battery pack is sleeved on a refrigerating pipeline between an outlet of the four-way valve and an inlet of the vapor-liquid separator, a normally-closed electromagnetic valve is arranged between an outlet of the compressor and an outlet of the four-way valve, and a controller of the air conditioning system controls the opening state of the normally-closed electromagnetic valve according to the heat dissipation requirement of the battery pack. According to the air conditioning system provided by the invention, one air conditioner integrates the compartment air temperature adjusting function and the battery cooling liquid temperature control function, and the battery cooling liquid temperature control function can be operated in the air conditioner refrigerating and heating modes; particularly, a one-way valve and an additional throttling device do not need to be additionally arranged in a pipeline system, and the system pipeline is simple, compact and high in reliability.

Description

technical field [0001] The invention relates to the technical field of pure electric passenger car air-conditioning units, in particular to a vehicle-mounted air-conditioning system with integrated battery cooling function. Background technique [0002] Pure electric buses or passenger cars not only need to adjust the air temperature in the compartment, but also need to control the temperature of the battery. Especially when the battery is charging, the battery generates a lot of heat. Generally, the top-mounted air conditioner is used to adjust the air temperature in the compartment. The water chiller is used to control the water of the battery cooling water, that is, two sets of refrigeration systems are required to realize the air conditioning of the cabin and the temperature control of the battery coolant. There are also a few overhead air conditioners (hereinafter referred to as integrated air conditioners) that integrate battery thermal management systems, but the pipe...

AI Technical Summary

Problems solved by technology

There are also a few top-mounted air conditioners that integrate battery thermal management systems (hereinafter referred to as integrated air conditioners) solutions, but generally the pipelines are bulky and the control is complicated

Generally, the integrated air conditioner can cool the battery coolant at the same time only in the cooling mode or only in the heating mode. Since the battery thermal management system needs to run for a long time in summer, the integrated cooling mode of the air conditioner and battery cooling is generally adopted. Therefore, in the air conditioner Defective inability to cool battery coolant while running in heating mode

In addition, there are very few overhead air conditioners with integrated battery thermal management system that can run the battery cooling function in both cooling and heating modes of the air conditioner, but several check valves and throttling devices are required, and the pipeline is complicated and heavy, reducing reliability

More importantly, the current overhead air conditioner solution that integrates the battery thermal management system cannot avoid the frequent start and stop of the compressor when the battery thermal management system is operated alone

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