Shell reinforcement structure and rotary compressor

Abstract

The invention provides a shell reinforcement structure and a rotary compressor. The shell reinforcement structure comprises a main shell of the rotary compressor, and one or more annular reinforcing pieces. The top and the bottom of the main shell are each of a barrel-shaped structure. Each annular reinforcing piece is installed on the outer side wall of the main shell in a sleeving mode. According to the scheme, the main shell is sleeved with one annular reinforcing piece or sleeved with the multiple annular reinforcing pieces at intervals in the axial direction of the shell so that the compressive strength of the main shell can be improved; the annular reinforcing pieces are simple in structure, the production cost is low, and installation is convenient; the main shell is reinforced through the annular reinforcing pieces, thus, the thickness of plates of the main shell does not need to be increased, and the problems that the forming difficulty of a reelpipe of the main shell, the material cost, the weight of the compressor and the transport cost are increased can be solved.

Description

technical field [0001] The present invention relates to the field of compressors, more specifically, to a shell reinforcement structure, and a rotary compressor with the shell reinforcement structure. Background technique [0002] Existing rotary compressors generally adopt a high back pressure mode, that is, the pump body of the compressor sucks low-temperature and low-pressure refrigerant gas for compression, and then discharges the high-temperature and high-pressure refrigerant gas into the air formed by the main casing and the upper and lower casings. Inside the cavity, this cavity is called the high pressure side. The high-pressure side cavity can be considered as a pressure vessel, which needs to meet the laws and regulations related to the pressure vessel’s compressive strength, such as UL certification in North America, which requires the compressive strength of the equipment to meet the maximum working pressure. For type compressors, the requirements for the compre...

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Problems solved by technology

The refrigerant used in the original compressor mostly used R22, but this refrigerant can cause damage to the ozone layer. Therefore, in recent years, the refrigerant used in the compressor has mostly used R410A, R32 and other refrigerants that will not damage the ozone layer. However, these new refrigeration However, the maximum working pressure of the agent is about 1.5 times higher than that of the former. In order to ensure that the compressive strength of the main shell still complies with the relevant regulations, the purpose of increasing the compressive strength is mainly achieved by increasing the thickness of the main shell plate. The increase in the thickness of the main shell plate will increase the difficulty of forming the coiled tube of the main shell, increase the cost of materials, increase the weight of the compressor, and increase the transportation cost.

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