Multi-cylinder oilless compressor of refrigerating agent recovery machine

Abstract

The invention discloses a multi-cylinder oilless compressor of a refrigerating agent recovery machine, comprising a box body, a cylinder, a crankshaft arranged inside the box body, and a motor provided with an output main shaft connected with the crankshaft, wherein the crankshaft is provided with an eccentric shaft part which is taken as a common driving shaft of a plurality of connecting rods; the eccentric shaft part is movably connected with the plurality of connecting rods which are sequentially arranged along the axial direction of the eccentric shaft part; the box body is provided with cylinders which have the number being same as that of the connecting rods; the cylinders are evenly distributed along the circumference correspondingly to the center of the crankshaft; each cylinder is internally provided with an air inlet valve, an exhaust valve and a piston; and the pistons are connected with the corresponding connecting rods in the cylinders where the pistons are arranged. The multi-cylinder oilless compressor overcomes the limitation that the existing compressor only has a single cylinder or double cylinders, expands the structure of three cylinders, four cylinders, six cylinders or eight cylinders on the basis of the double cylinders, and has the characteristics of small volume, light weight, simple and compact structure, rapid refrigerating agent recovery and thorough recovery.

Description

technical field [0001] The invention relates to an oil-free compressor, in particular to a multi-cylinder oil-free compressor of a refrigerant recovery machine. Background technique [0002] With the strengthening of people's awareness of environmental protection and the continuous rise of refrigerant prices, the recovery and reuse of refrigerants has become inevitable, and various types of refrigerant recovery machines have also appeared. However, all kinds of recovery machines on the market currently use the structure of a single-cylinder compressor and an AC motor. In the single-cylinder compressor structure, the crankshaft of the compressor only performs one suction and one exhaust when the crankshaft rotates once. When the connecting rod moves to the bottom dead center, it is only an intake process. At this time, the intake valve is opened and the exhaust valve is closed. , there is no refrigerant discharge action; while the connecting rod is only an exhaust process wh...

AI Technical Summary

Problems solved by technology

In addition, limited by the volume of the slider mechanism and the assembly method of the connecting rod, it is impossible to adopt a structure in which the crank part and the connecting rod transmission part are placed in a closed crankcase, and it cannot be made into a multi-cylinder structure larger than two cylinders. Limited efficiency improvement

Furthermore, the cylinder 1' is directly placed on the end faces of the left and right cages 7', 10' and the left and right casings 4', 2', and a thin copper gasket is placed between the cylinder 1' and the cage, and the sealing performance is extremely poor. The piston ring is not well sealed, and the refrigerant will leak directly into the air

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