A car air conditioning system

Abstract

The automotive air conditioning system has five working modes: cooling mode, heating mode, defogging mode, deicing mode, and battery preheating mode, including the temperature control circuit of the heating component and the heat pump system, in which the refrigerant circulation circuit and the temperature control circuit of the heating component Heat exchange is performed through a double-channel heat exchanger. The first channel of the dual-channel heat exchanger is connected to the refrigerant circulation circuit, and the second channel of the double-channel heat exchanger is connected to the temperature control circuit of the heating component; the temperature control circuit of the heating component can be selected Cool or heat the heat-generating components; make the battery and other heat-generating components work within the normal temperature range to maintain relatively high efficiency.

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] With the continuous improvement of the quality of life, people pay more and more attention to the comfort in the car compartment. 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 compartment, while the power of electric vehicles main...

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, the current car air conditioner blows out cold air in the compartment during demisting, which will cause discomfort in the compartment when the weather is relatively cold.

[0005] For example, the invention titled electric vehicle heat pump system and application number 200510027576.8 uses the heat pump system to control the temperature of electric vehicles, but the air conditioner has certain limitations on the defogging and defrosting modes. When the nearby dew point temperature is higher than the temperature of the outer glass, fog will be generated, affecting the driver's sight

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.

Therefore, for automobile air conditioners, defogging and deicing functions are required. When defogging and deicing are required, the internal condenser and internal evaporator cannot be turned on at the same time in this patent; at most, the internal evaporator can only be turned on separately. , that is to start the cooling mode, which will cause the temperature in the car to drop, which will greatly reduce the comfort in the car; and in addition, the patent does not set temperature controls such as cooling or heating of heat-generating components such as batteries, which will affect the temperature of the car. mileage and service life of heat-generating components such as batteries

Images