Variable displacement piston for air conditioner compressor

摘要

The present invention relates to a piston for an air conditioner compressor for pressurizing and compressing a refrigerant while reciprocating inside a cylinder in a compressor of an automobile air conditioner. In particular, a head for pressurizing the refrigerant is installed in the piston body, The present invention relates to a variable displacement piston for an air conditioner compressor capable of buffering instantaneous high pressures and preventing the piston from seizing to the bore of the cylinder.;A variable displacement piston for an air conditioner compressor according to the present invention includes a piston body (71) having a recessed groove (71a) into which the outer circumference of the swash plate (5) is recessed; And a head 72 which is separately formed from the main body and coalesced on the front surface of the main body to elastically pressurize the refrigerant. According to such a feature, a sudden impact caused by inflow of a liquid refrigerant or excessive refrigerant inflow Since the spring 73 can be buffered and removed, the phenomenon in which the piston 70 adheres to the cylinder 3 bore 3a due to the overload caused by the refrigerant can be prevented. Therefore, in the case of using a piston for a conventional compressor, the pressure relief valve, which had to be additionally installed in the compressor in order to cushion the instantaneous overload caused by the refrigerant, can be eliminated, so that the manufacturing cost of the compressor can be greatly reduced, and the fixed capacity type of the low cost As a swash plate compressor, the cost of the compressor can be greatly reduced by replacing the expensive variable displacement swash plate compressor.