Rotary compressor and refrigeration system having same

Abstract

The invention discloses a rotary compressor and a refrigeration system thereof. The rotary compressor includes: a housing; a power unit, the power unit is arranged in the housing; a compression mechanism, the compression mechanism is arranged in the housing, the compression mechanism is driven by the power unit, and the compression mechanism includes: a cylinder assembly, an upper bearing, a lower bearing, The upper bearing and the lower bearing are respectively arranged at both ends of the cylinder assembly, and the cylinder assembly includes a final stage cylinder and at least one front stage cylinder, each of the final stage cylinder and the front stage cylinder is provided with a first-stage compression chamber, and the front stage At least one cylinder of the cylinders is provided with a lateral exhaust passage, one end of the lateral exhaust passage communicates with the compression chamber of the corresponding preceding cylinder, and the other end passes through the cylinder wall of the preceding cylinder and communicates with the radial exterior of the preceding cylinder. According to the rotary compressor of the present invention, the exhaust area of ​​the front-stage cylinder can be increased to increase the exhaust volume of the front-stage cylinder by providing a side exhaust passage on the front-stage cylinder.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a rotary compressor and a refrigeration system with the same. Background technique [0002] Different from the single suction and single exhaust process of the single-stage compression compressor, the two-stage compression rotary compressor has two suction and two exhaust processes. In the conventional two-stage compression compressor, The lower cylinder is exhausted downwards, and then the gas compressed by the lower cylinder is drawn out at the auxiliary bearing (or other positions). The power loss caused by the exhaust is relatively large. Therefore, it is hoped to increase the exhaust passage area of ​​each stage of the cylinder. According to the conventional The idea is that the cylinders of each stage need to be set up in a double-row structure. Considering that the exhaust pressure of the upper cylinder and the lower cylinder is not equal, it is necessary to install th...

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Problems solved by technology

[0002] Different from the single suction and single exhaust process of the single-stage compression compressor, the two-stage compression rotary compressor has two suction and two exhaust processes. In the conventional two-stage compression compressor, The lower cylinder is exhausted downwards, and then the gas compressed by the lower cylinder is drawn out at the auxiliary bearing (or other positions). The power loss caused by the exhaust is relatively large. Therefore, it is hoped to increase the exhaust passage area of ​​each stage of the cylinder. According to the conventional The idea is that the cylinders of each stage need to be set up in a double-row structure. Considering that the exhaust pressure of the upper cylinder and the lower cylinder is not equal, it is necessary to install three partitions between the upper cylinder and the lower cylinder. Isolation function, both the upper partition and the lower partition have an exhaust structure. After such a design, the height of the compressor will increase and the cost will increase, so this design is unreasonable

[0003] For the existing two-stage compression compressor, the pressure behind the sliding vane groove of the first stage cylinder is the exhaust pressure. Although this can ensure that the sliding vane follows the piston movement, it will obviously increase the force on the sliding vane, thereby aggravating the sliding. The friction between the tip of the plate and the piston affects the performance of the compressor

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