An electric vehicle air conditioning system

Abstract

The invention discloses an electric vehicle air conditioner system which comprises a refrigerant circulation loop and a coolant circulation loop. The refrigerant circulation loop comprises a compressor for compressing refrigerant, a valve or a valve assembly for switching a refrigerant flow path, a heat exchanger outside a carriage, a heat exchanger in the carriage and a throttle assembly in pipeline connection between the heat exchanger outside the carriage and heat exchanger inside the carriage. The refrigerant circulation loop comprises an electric water pump in pipeline connection, a first double flow channel heat exchanger and at least one fifth heat exchanger. The electric vehicle air conditioner system further comprises a second double flow channel heat exchanger in pipeline connection at an entrance side of a throttle device in the throttle assembly. The electric vehicle air conditioner system can not only prevent cooling devices like a battery from losing effect due to supercooling of coolant, and refrigerating capacity per unit of the electric vehicle air conditioner system can be improved.

Description

technical field [0001] The invention relates to an electric vehicle air conditioning system, in particular to an electric vehicle air conditioning system capable of ensuring good heat dissipation and stable operation of some main components of the electric vehicle and ensuring driving safety. Background technique [0002] With the development of low-carbon economy, higher and stricter requirements are put forward for energy saving and emission reduction. Because electric vehicles have the characteristics of energy saving and environmental protection, they will become one of the future development directions of automobiles. However, on the other hand, electric vehicles are equipped with multiple heat-generating components, such as motor inverters, batteries, etc., which need to be cooled by corresponding heat dissipation devices to ensure that the above-mentioned components can work within the allowable temperature range. [0003] In order to ensure that the heat-generating c...

AI Technical Summary

Problems solved by technology

However, due to seasonal changes, the ambient temperature in which the air conditioner operates also changes at any time. That is to say, due to seasonal changes, coupled with the congenital defects of the originally designed refrigeration system, the air-cooled radiators of most systems And the outlet air temperature or water temperature of the water-cooled radiator is difficult to control within the range of use of the heating element

Even if the working temperature of the heating element can be kept constant, the refrigeration system that provides the cooling capacity is relatively complicated and the cost will be relatively high

Especially for some equipment with relatively high temperature requirements, such as batteries, the normal operating temperature range is relatively narrow, and it is difficult to control the temperature of the battery within the normal range. If the temperature of the coolant is below the normal operating range, it is likely to cause battery damage. fail

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