Air suction and exhaust system structure of piston type refrigeration compressor

Abstract

The invention discloses an air suction and exhaust system structure of a piston type refrigeration compressor. The air suction and exhaust system structure comprises a connection rod, a piston pin, a piston, a crank case, a valve plate, an air exhaust valve sheet, an air exhaust limiter and an air cylinder cover. One end of the connection rod is connected with the piston. The piston is arranged in the crank case. The valve plate is provided with an air exhaust hole. The air exhaust valve sheet and the air exhaust limiter are arranged on the valve plate. The wall face of an air cylinder hole of the crank case is provided with an air suction hole. The distance from the forming position of the air suction hole to the end face of the crank case can be larger than 1/3 of the piston stroke and smaller than 1/2 of the piston stroke. Due to the fact that an air suction valve sheet which is the damageable key part in an existing piston type refrigeration compressor is omitted, the air suction hole is closed and opened through reciprocating motion of the piston so as to achieve the air suction function of the compressor, the cost of the compressor is reduced, the whole compressor noise of the compressor is greatly lowered, the thermodynamic efficiency of the compressor is further improved, and the reliability of the compressor is greatly improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration compressors, in particular to a suction and discharge system structure of a piston refrigeration compressor. Background technique [0002] The working principle of the piston refrigeration compressor is to periodically and alternately realize the supply of refrigerant to the refrigeration system through the suction and exhaust process. Both the suction and exhaust processes are one-way flow of refrigerant. When the piston moves to the bottom dead center, the cylinder volume increases, the gas expands, and the air pressure decreases. When the pressure drops below the suction pressure, the suction valve plate Open, the refrigerant on the low-pressure side enters the cylinder; when the piston moves to the top dead center, the volume of the cylinder decreases, the gas is compressed, and the air pressure increases. When the pressure rises higher than the exhaust pressure, the exhaust valve opens ...

AI Technical Summary

Problems solved by technology

However, due to the long-term opening and closing of the suction valve, it is subject to periodic impact loads and bending loads, which is prone to impact fatigue and bending fatigue damage.

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