Oil return device for compressor and compressor including same

Abstract

The invention discloses an oil return device for a compressor and a compressor with the oil return device. The oil return device comprises a front cylinder block and a rear cylinder block. A low-pressure cavity is formed by the upper portion of the front cylinder block and the upper portion of the rear cylinder block in a surrounding mode, a cylinder block inner cavity is formed by the middle of the front cylinder block and the middle of the rear cylinder block in a surrounding mode, and a low-pressure oil inlet for introducing refrigerant gas and refrigerating oil is formed in the top of the rear cylinder block and communicated with the low-pressure cavity. An oil return groove is formed in a connecting part, and the low-pressure cavity is communicated with the cylinder block inner cavity through the oil return groove. At least one refrigerant gas outlet is formed in the left end of the front cylinder block, at least one refrigerant gas outlet is formed in the right end of the rear cylinder block, and the distance between the bottom ends of the refrigerant gas outlets and the bottom end of the low-pressure cavity is 0.2-0.8 time the height of the low-pressure cavity. The compressor comprises the oil return device. The oil return device and the compressor are simple in structure, low in working noise and energy consumption and convenient to maintain, and undesirable oil return of the cylinder block inner cavity, abrasion of parts in the cylinder block inner cavity and liquid impact to the compressor are avoided.

Description

technical field [0001] The invention relates to an oil return device for a compressor and a compressor comprising the same. Background technique [0002] At present, the two-way inclined plate piston compressor used in the air conditioning system has a front and rear cylinder structure. Under normal assembly conditions, the suction port between the front and rear cylinder joint surfaces is closed, and the inner cavity of the cylinder is not connected to the suction cavity. The mixed gas of low-temperature and low-pressure refrigerant gas and refrigerated oil circulating from the evaporator outlet of the air-conditioning system to the suction port of the compressor cannot return to the inner cavity of the cylinder after colliding with the cylinder wall, but follows the suction port passages of the front and rear cylinders. It returns to the suction valve plate of the front and rear covers, is pressed to the exhaust pipe port by the piston again, and enters the high-pressure p...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems in the prior art that the parts in the cylinder body of the traditional compressor are easily damaged due to lack of oil, and the residual amount of refrigeration oil in the system pipeline is too high to cause high pressure and easy blockage. , refrigerating capacity drop and other defects, provide an oil return device for a compressor and a compressor containing it

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