Trans-critical reciprocating piston compressor taking CO2 as refrigerant

Abstract

The invention relates to a trans-critical reciprocating piston compressor taking CO2 as a refrigerant. The trans-critical reciprocating piston compressor taking the CO2 as the refrigerant comprises amachine body, air cylinder covers are arranged on the two sides of the top of a machine main body of the machine body in a staggered mode correspondingly, an air cylinder is arranged inside the machine body, a piston is arranged inside the air cylinder, a bearing seat is installed at one end of the machine body, a motor cover is installed at the other end of the machine body, an inner cavity of the machine body, the bearing seat and the motor cover form a closed cavity, the cavity of the machine body comprises a motor box, a crankcase and a compression cavity, the motor box is located on the side close to the motor cover, the crankcase is located on the side close to the bearing seat, a crankshaft is arranged inside the crankcase, the crankcase is connected with the motor box through the crankshaft, a motor in the motor box drives the crankshaft to do rotary motion, the crankshaft is in transmission connection with the piston, a valve plate is arranged inside the compression cavity, the valve plate is placed at the top of the air cylinder, and when the piston does reciprocating movement, corresponding air suction and exhaust are completed. The efficiency of the piston compressor ishigher than that of a compressor in other form under the working condition of large pressure difference.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a CO 2 Transcritical reciprocating piston compressor as refrigerant. Background technique [0002] CO 2 Its history as a refrigerant can be traced back to more than 100 years ago. As early as 1866, Thaddeus S.C.Lowe of the United States first used CO 2 ice making, although CO 2 It is not the only refrigerant in the early days, but due to its non-toxicity and non-flammability, CO is widely used in the fields of food industry and civil building air-conditioning. 2 The refrigeration unit occupies a major position. In the 1930s, due to the emergence of chlorofluorocarbon refrigerants, CO 2 quickly replaced. [0003] At present, in the field of refrigeration and air conditioning, the refrigerants used are mainly freons. Because freons can cause the hole in the ozone layer and the greenhouse effect of the atmosphere, they are restricted by various countries and g...

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Problems solved by technology

[0003] At present, in the field of refrigeration and air conditioning, the refrigerants used are mainly freon-type refrigerants. Since freon-type refrigerants will cause the hole in the ozone layer and the greenhouse effect of the atmosphere, they are restricted by various countries and phased out.

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