Valve assembly of reciprocating compressor

Abstract

A valve assembly of a hermetic reciprocating compressor. It includes a valve plate provided between a cylinder block and a cylinder head, a reed valve for opening / closing a refrigerant discharge hole formed on the valve plate, and a first stopper for resisting bending deformation of the reed valve. Force, the second stopper, used to resist the bending deformation force of the first stopper, and the positioning piece used to limit the bending degree of the second stopper, and cooperate with the positioning piece to be used for being bent by the reed valve Bolts to which the stoppers are attached. When the refrigerant discharge pressure increases, the resistance against the bending force is applied alternately by the first stopper and the second stopper, thereby increasing the compression efficiency by changing the opening degree of the reed valve corresponding to the pressure change, and at the same time Noise can be reduced by dampening the vibrations applied to the reed valve. When the discharge pressure of the refrigerant increases abnormally, the degree of deformation of the second stopper restricted by the positioning member is controlled by the bolt.

Description

technical field [0001] The present invention relates to a valve assembly of a reciprocating compressor, which is installed on a cylinder head of the compressor for controlling discharge operation of refrigerant compressed in the cylinder. Background technique [0002] Freezing systems such as refrigerators have compressors for compressing refrigerant. figure 1 The hermetic reciprocating compressor shown is an example of a compressor. [0003] The compressor 1 has a housing 3 having a sealed inner space defined therein, a cylinder device 21 for compressing refrigerant, and a driving motor for driving the cylinder device 21 . [0004] A suction pipe 5 for sucking gaseous refrigerant, a discharge pipe (not shown) for discharging refrigerant compressed by the compressor 1 , and an electrical contact 9 for supplying power to the compressor 1 are formed inside the casing 3 . [0005] The drive motor 11 has a stator 13 , a rotor 15 and a shaft 19 rotated by the stator 15 . The s...

AI Technical Summary

Problems solved by technology

Even in this case, since the position of the stopper 71 limited by the positioning member 73 and the resistance exerted by the stopper 61 do not change, the pressure in the inner chamber 23a of the cylinder is limited because the degree of opening of the discharge hole 31b is limited. Increase

Due to the increased pressure, the refrigerant cannot be actively discharged, and the compression efficiency of the compressor also decreases

Also, since the collision force between the reed valve 61 and the stopper 71 increases, the noise generated thereby also increases, and there is a possibility that the reed valve 61 and the stopper 71 are broken.

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