Automobile temperature control device and control method thereof

Abstract

The invention provides an automobile temperature control device and a control method thereof. The method comprises the steps that S1, monitoring and acquiring a first actual temperature value of the surface of an evaporator of a passenger compartment, a battery pack temperature value of a battery cooling system, a target temperature value of the surface of the evaporator of the passenger compartment and a target temperature value of a battery pack in real time; S2, judging whether the passenger compartment side has a refrigeration requirement or not according to the first actual temperature value and a target temperature value on the surface of the passenger compartment evaporator, and judging whether the battery side has a refrigeration requirement or not according to the battery pack temperature value and the battery pack target temperature value; and S3, determining the rotating speed of the compressor according to the judgment result in the step S2, and adjusting the opening degreeof the first electronic expansion valve and / or the second electronic expansion valve. Accurate distribution of refrigerants can be achieved, the energy consumption of a system is reduced, and the economy of the whole vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of automobile temperature control, in particular to an automobile temperature control device and a control method thereof. Background technique [0002] With the increasing popularity of new energy vehicles, the requirements for the mileage of new energy vehicles are also increasing. However, due to the limitation of the vehicle space, the solution of increasing the battery volume is not very operable, so increasing the energy density of the power battery has become an effective solution that has been used in the industry to improve the cruising range of new energy vehicles. The energy density of the power battery is increased, and the accompanying problems are the large heat generation and high temperature of the battery, which have a negative impact on the battery's power and life. The battery cooling system is specially used to cool the battery in response to the above problems. It uses a plate heat exch...

AI Technical Summary

Problems solved by technology

In terms of cost control, the cost of the liquid cooling system will increase due to the need to add more components in the waterway; in terms of performance, in the liquid cooling system, most of the battery cooling uses a solenoid valve + thermal expansion valve throttling control system, thermal expansion Valves are mechanical components. In order to achieve optimal performance, thermal expansion valves with different openings need to be matched under different heat loads, which requires more research and development costs and has certain limitations in control accuracy.

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