Electric Vehicle DC Power Supply Air Conditioning Compressor

Abstract

The invention discloses a DC (direct current)-powered air condition compressor of an electrical vehicle. The compressor comprises an airtight shell, wherein the inner cavity of the airtight shell is divided into a motor assembly side and a pump body assembly side by a middle baffle and a sound proof housing; the motor assembly comprises a stator assembly and a rotor assembly; the stator assembly is connected with a DC power supply in the electrical vehicle through a controller; the stator assembly drives the rotor assembly to rotate after being electrified; the pump body assembly comprises a first bearing, a first air cylinder, a second air cylinder and a second bearing; the first air cylinder and the second air cylinder are arranged in parallel; the first bearing forms the left end surface of the first air cylinder; the second bearing forms the right end surface of the second air cylinder; a crankshaft can rotationally pass through the inner holes of the first and second bearings; a first piston and a second piston are eccentrically and fixedly arranged on the crankshaft in a sleeving way; and the first piston and the second piston are symmetrically arranged in reverse directions. The compressor can steadily operate at both a low speed and a high speed, small in vibration and low in noise; the tolerance clearance can be strictly controlled, less freezing mediums is leaked, refrigerating capacity is high, and power consumption and price are low.

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...

AI Technical Summary

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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