Reciprocating compressor and refrigerator having same

Abstract

The invention discloses a reciprocating compressor and a refrigerator with the same. The reciprocating compressor comprises a crankshaft, an air cylinder, a piston and an eccentric sleeve. The crankshaft comprises a main shaft and an eccentric shaft which are connected with each other and are eccentrically arranged, the piston is connected with the eccentric shaft through a connecting rod, the piston is arranged in the air cylinder and can move in the axial direction of the air cylinder, and an eccentric shaft sleeve is arranged on the eccentric shaft and located in a rod hole of the connecting rod; the eccentric shaft sleeve is located at the first position when the crankshaft rotates in the first direction, and is located at the second position when the crankshaft rotates in the second direction opposite to the first direction; when the eccentric shaft sleeve is located at the first position, the outer diameter center of the eccentric shaft sleeve is located on the side, far away from the main shaft, of the inner diameter center of the eccentric shaft sleeve; and when the eccentric shaft sleeve is located at the second position, the outer diameter center of the eccentric shaft sleeve is located on the side, close to the main shaft, of the inner diameter center of the eccentric shaft sleeve. The reciprocating compressor has different displacements when rotating in different directions, the displacement of the reciprocating compressor is adjustable, and the power dissipation is smaller.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a reciprocating compressor and a refrigerator having the same. Background technique [0002] The biggest feature of the frequency conversion refrigerator compressor is that the speed of the motor is variable, generally ranging from 1200 to 4500 rpm. The lower the speed, the lower the power of the compressor, which is more conducive to the energy saving of the refrigerator under energy-saving conditions. However, the speed of the variable frequency compressor cannot be infinitely small. Below a certain speed, the compressor cannot pump oil for lubrication, and the vibration of the whole machine cannot be suppressed if the speed is too low. When the refrigerator system is matched with the compressor, it is necessary to ensure that the high speed can meet the cooling speed requirements, and the power consumption of the low speed should be sufficiently small in the energy-saving ...

AI Technical Summary

Problems solved by technology

Under the premise of ensuring the reliability of lubrication, the existing frequency conversion refrigerator compressor has strict requirements on the minimum speed, which makes it impossible for the refrigerator to use the optimal speed in the energy-saving mode, thus making it impossible to reduce the power consumption of the refrigerator in the energy-saving mode

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