Car air-conditioning system

Abstract

A car air-conditioning system comprises a compressor, a gas-liquid separator which is located in front of an air inlet of the compressor, a first heat exchanger and a second heat exchanger, a compartment outer heat exchanger and a throttling component. The first heat exchanger and the second heat exchanger are respectively arranged and conduct heating, cooling or demisting on the compartment according to working condition requirements in the compartment. The first heat exchanger is connected with an air outlet of the compressor. The car air-conditioning system comprises a refrigerating mode, a heating mode, a demisting mode and a deicing mode. When moisture is eliminated, wind which is supplied to the compartment dried through the second heat exchanger and then passes the first heat exchanger. The first heat exchanger can choose whether to warm up, and then supplies the wind to the compartment. Therefore, the temperature of the wind which is supplied to the compartment can be chosen, and comfort is improved.

Description

technical field [0001] The invention relates to the technical field of automobile air conditioning, in particular to an electric automobile air conditioning system. Background technique [0002] With the development of low-carbon economy, more stringent requirements are put forward for energy saving and emission reduction. Electric vehicles will become one of the aspects of future automobile development due to their energy-saving and environmental protection features. However, since electric vehicles use batteries as a power source, their air-conditioning systems are also different from the original automotive air-conditioning systems. [0003] Traditional internal combustion engine vehicles can use the waste heat of the internal combustion engine and the heat of the engine exhaust to heat the cabin, while the power of electric vehicles mainly comes from the motor, which lacks the heat of the engine to be used, making it difficult to meet the heating requirements in winter. ...

AI Technical Summary

Problems solved by technology

[0004] However, in the various heating methods mentioned above, if an independent heat source is used, such as purely using PTC for heating, it will consume more battery energy, which will reduce the mileage of the car; if fuel heating is used, not only the heating efficiency is low, It will also pollute the environment and increase the load on the car

In addition, in winter, when the dew point temperature near the inner glass of the car is higher than the temperature of the outer glass, fog will be generated, which will affect the driver's sight. Cold wind, which can cause discomfort in the cabin when the weather is relatively cold

And when the temperature outside the car is below zero, there may be rainwater or snow accumulated on the surface of the heat exchanger outside the car, causing the energy efficiency ratio to decrease during heating operation, so deicing or defrosting is required to improve heat transfer efficiency

However, in the existing car air conditioner, the compartment is not ventilated during deicing, which will cause the temperature in the compartment to drop, which will greatly reduce the comfort in the car.

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