Electric compressors and refrigeration equipment

Abstract

The invention discloses an electric compressor and refrigeration equipment. Wherein, the shell of the electric compressor is an aluminum alloy shell, and lubricating oil and refrigerant are encapsulated in the aluminum alloy shell, and the aluminum alloy shell is made of aluminum alloy powder by extrusion casting, and the aluminum alloy powder contains : 0.1-12wt% of silicon; 0.2-2.0wt% of magnesium; 0.2-2.0wt% of iron; 0.05-1.0wt% of zinc; 0.01-0.5wt% of titanium; 0-3.0wt% of copper; 0.5wt% manganese; 0-0.5wt% nickel; 0-0.5wt% tin; and the balance aluminum. The shell of the electric compressor is made of squeeze-cast aluminum alloy with high compressive strength and yield strength, suitable for CO 2 Electric compressor for refrigerant.

Description

technical field [0001] The invention relates to the technical field of electric compressors, in particular, the invention relates to electric compressors and refrigeration equipment. Background technique [0002] Due to its energy saving and environmental protection, electric vehicles have become an ideal choice for new energy vehicles. There are many components in electric vehicles and their weight is large, and the space available for layout is small. Therefore, the miniaturization and weight reduction of electric compressors are important issues that need to be solved. . At present, most electric compressors use aluminum as the sealed shell, and the refrigerant uses R134a refrigerant. Since the working pressure of R134a refrigerant is relatively small, the aluminum shell can meet the sealing requirements by general-purpose casting. R134a refrigerant belongs to hydrofluorocarbons, the ozone layer destruction coefficient is 0, but the climate warming potential is very high...

AI Technical Summary

Problems solved by technology

R134a refrigerant belongs to hydrofluorocarbons, the ozone layer destruction coefficient is 0, but the climate warming potential is very high, there is no deadline for use in the Montreal Protocol, but it is characterized as a greenhouse gas in the Kyoto book of the United Nations Framework Convention on Climate Change , the European Union will ban the use of high-GWP hydrofluorocarbons (HFCS) and other related refrigerants, so the use of low-GWP refrigerants for automotive air conditioners has become a trend and necessity

[0003] Carbon dioxide refrigerant is a natural working medium, ODP=0, GWP=1, wide source, low cost, large latent heat of evaporation, high cooling capacity per unit volume, but the working pressure of carbon dioxide refrigerant compressor is as high as 15MPa, which is a conventional refrigerant 5~ 10 times, the pressure resistance and yield capacity of its sealed shell are extremely high. Conventional aluminum alloys adopt general pressure casting with low density and cannot meet high pressure requirements.

If the shell is made of hot-rolled steel plate, the thickness of the carbon dioxide compressor shell must be increased to 6-10mm to meet the requirements, which will lead to an increase in the overall compressor weight, which cannot meet the lightweight requirements of automotive air-conditioning compressors, thereby reducing user satisfaction.

[0004] Therefore, the existing electric compressor housing still needs to be improved

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