Vehicle heat pump air conditioning system and control method thereof

Abstract

The invention discloses a vehicle heat pump air-conditioning system and a control method thereof, the vehicle heat pump air-conditioning system comprises a refrigeration loop and an air supply module; the refrigeration loop comprises a compressor, an out-vehicle heat exchanger, an in-vehicle heat exchanger, a demisting heat exchanger, a throttling device and a four-way valve, the four-way valve is provided with a port H, a port I, a port J and a port K, an exhaust port of the compressor is connected with the port H, the external heat exchanger is connected with the port I, the demisting heat exchanger is connected with the port J, and the internal heat exchanger is connected with the port K; the throttling device is connected between the out-vehicle heat exchanger and the in-vehicle heat exchanger, and the demisting heat exchanger is connected with an air suction port of the compressor through the gas-liquid separator; and the air supply module comprises an air duct and an in-vehicle fan, and the air duct is provided with an air inlet, an air conditioner air outlet and a demisting air outlet. The demisting function can be achieved under the refrigerating and heating conditions at the same time, it is avoided that cold air is blown to the human body during demisting in the wet and cold weather, and the user experience is improved.

Description

technical field [0001] The present invention relates to the technical field of automobiles, in particular to a heat pump air-conditioning system for a vehicle and a control method thereof. Background technique [0002] Automobile is a common means of transportation for people's daily travel, and is widely used in people's daily life. Cars are usually equipped with air conditioners to meet the user's cooling or heating requirements in different environments, while conventional car air conditioners usually include compressors, condensers, throttling devices and evaporators, compressors, condensers and evaporators It is connected through a four-way valve, and cooling and heating are realized by controlling the four-way valve. However, in actual use, when the temperature of the external environment is low and the humidity is high, the high-humidity air exhaled by the occupants of the car is likely to fog up inside the car, and then a defogging operation is required. At this ti...

AI Technical Summary

Problems solved by technology

However, since the temperature inside the car itself is very low, the air conditioner will blow out cold air. On the one hand, it will cause the temperature inside the car to drop and affect the user experience. energy, resulting in higher energy consumption

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