Reciprocating sealed compressor

Abstract

The invention provides a reciprocating sealed compressor, comprising a seal shell, a motor that is arranged in the sealed shell, a gas compressing device and an exhaust system, a cylinder block that fixes the motor, the gas compressing device and the exhaust system and connects the motor, the gas compressing device and the exhaust system with the sealed shell in an installation way by a spring; wherein, the gas compressing device comprises an air cylinder, a valve plate, a piston and a piston-rod, a cylinder head including a cylinder and a cylinder block connecting body. The compressor is characterized in that the exhaust system has a muffling structure with a tertiary expansion chamber; an air cylinder cover is a trilocular cylinder cover that is respectively provided with an induction chamber, an exhaust chamber and a primary expansion chamber which respectively form an induction cavity, an exhaust cavity and a primary expansion cavity after the trilocular cylinder cover is combined with the valve plate; a secondary expansion cavity is formed by a secondary expansion chamber arranged at the cylinder head and the valve plate; the tertiary expansion cavity is arranged on the cylinder block; the primary, secondary and tertiary expansion cavities are communicated mutually; the primary expansion cavity is communicated with the exhaust cavity; an exhaust pipe is communicated with the tertiary expansion cavity. The expansion cavity of the invention has the advantages that the muffling levels are numerous, the gas pulsation is small, the vibration noise of the compressor is low, and the production cost is low.

Description

technical field [0001] The invention relates to a reciprocating hermetic compressor. Background technique [0002] Existing a kind of reciprocating hermetic compressor is shown in Figure 5, and it has sealed housing 5 and 50, has in sealed housing 5 and 50 the electric motor that is made up of motor stator 32 and motor rotor 35, gas compression device and exhaust System, a cylinder seat 15 fixes the motor, gas compression device and exhaust system and is installed and connected with the sealed casing 50 through a spring 51. The gas compression device includes a cylinder 3, a valve plate 6, a piston 1, and a piston connecting rod 31, including a cylinder The cylinder head of 3 is connected with the cylinder block 15, the valve plate 6 covers the cylinder 3, the middle part of the cylinder block 15 is provided with a crankshaft mounting hole, the crankshaft 36 passes through the crankshaft mounting hole, one end of the crankshaft 36 has an eccentric shaft 33, and the piston co...

AI Technical Summary

Problems solved by technology

[0006] The advantage of this structure is that the structure is simple and compact, and its disadvantages are: the high-pressure gas is directly discharged from the compressor only through the first-stage expansion chamber, the gas decompression is not enough, the air flow of the compressor is pulsating, and the vibration and noise are large.

[0009] Its disadvantages are: first, the number of stages of the expansion cavity is small, which easily leads to large air flow pulsation, compressor vibration and noise; second, the cost is high, and parts such as the sound-absorbing cover and the screws used to fix the sound-absorbing cover are added, and the two-stage compressor is formed. Material of the cylinder block part of the expansion chamber

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