Electric Vehicle DC Power Supply Air Conditioning Compressor

Abstract

The DC power supply air-conditioning compressor for electric vehicles includes a sealed casing. The inner cavity of the sealed casing is divided into a motor component side and a pump body component side by an intermediate partition and a muffler cover. The motor component includes a stator component and a rotor component. The stator component passes through The controller is connected to the DC power supply in the electric vehicle. After the stator assembly is energized, it drives the rotor assembly to rotate. The pump body assembly includes a first bearing, a first cylinder, a second cylinder, a second bearing, the first cylinder and a second The cylinders are arranged in parallel, the first bearing forms the left end surface of the first cylinder, and the second bearing forms the right end surface of the second cylinder. The crankshaft is rotatably installed in the inner holes of the first bearing and the second bearing, and the crankshaft is eccentrically The fixed set has a first piston and a second piston, and the first piston and the second piston are arranged in reverse symmetry. Advantages: Stable operation at both low and high speeds, low vibration, and low noise; the fit gap can be strictly controlled, small refrigerant leakage, high cooling capacity, low power consumption, and low price.

Description

technical field [0001] The invention relates to a compressor applied to an air-conditioning system in an electric vehicle. Background technique [0002] With the depletion of world resources, my country's energy crisis is becoming more and more serious, and environmental problems are becoming more and more prominent, and the number of automobiles in my country will continue to grow rapidly in the next few years. my country has invested a lot of money and preferential policies in the development of new energy electric vehicles, and has given a time node to accelerate the development of the new energy electric vehicle industry. As one of the accessories of electric vehicles, DC-powered air-conditioning compressors for electric vehicles need continuous development to meet the needs of the development of the entire industry. [0003] The DC power supply air conditioner compressor of electric vehicles is directly powered by the battery, and the battery is a DC power supply, whic...

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Problems solved by technology

[0003] The DC power supply air conditioner compressor of electric vehicles is directly powered by the battery, and the battery is a DC power supply, which is generally used after being charged by the mains. The structure of compressors is quite different. At present, the compressors used in the air-conditioning system of electric vehicles are mainly electric scroll compressors. Nanjing Aotejia electric scroll compressors have a relatively high market share, which uses flexible scrolls Structure, less vibration, its scroll is divided into movable scroll and fixed scroll, the gas is compressed by the meshing of movable scroll and fixed scroll, but because the movable scroll and fixed scroll are both The vortex shape is complex and difficult to process. At present, due to the limitation of manufacturing technology in China, the scroll processing technology is immature, so that the machining accuracy of the scroll cannot be guaranteed, and the cooperation between the movable scroll and the static scroll The clearance cannot be strictly controlled, and the fitting clearance of the compressor is generally in units of μ. If the precision is low, the clearance is large, and the fitting clearance cannot be effectively controlled, it will lead to a large amount of refrigerant leakage, especially at low speed operation. This results in low overall efficiency of the compressor, especially in the low-speed operating range where the refrigerant leakage is large and the cooling capacity is low, which directly leads to an increase in power consumption, which seriously affects the cruising range of electric vehicles and cannot adapt to new energy sources. The development direction of electric vehicles; in addition, due to the high processing cost of the scroll disk and the expensive aluminum shell of the compressor, the overall cost of the compressor is relatively high, while the imported electric scroll compressor is expensive and costly, which is not conducive to new energy electric vehicles. Development of the automobile industry

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