Rotational compressor and electrical product comprising rotational compressor

Abstract

The invention discloses a rotational compressor and an electrical product comprising the rotational compressor. The rotational compressor comprises an air cylinder, an upper cover, a lower cover, a rolling piston and a sliding plate, wherein the upper cover and the lower cover are arranged at the two ends of the air cylinder, and the rolling piston and the sliding plate are arranged in the air cylinder. An inner cavity of the air cylinder is divided by the rolling piston and the sliding plate into a suction cavity and a compressing cavity. A main exhaust passage communicating with the compressing cavity is arranged on the inner wall of the air cylinder. At least one of the upper cover and the lower cover is provided with an auxiliary exhaust passage and an auxiliary exhaust valve used for controlling opening and closing of the auxiliary exhaust passage. The projection position, on a horizontal plane, of an air inlet of the auxiliary exhaust passage is located in a preset area. When the rotational compressor is in an exhaust stage and the air inlet of the auxiliary exhaust passage communicates with the compressing cavity, the auxiliary exhaust valve is opened so that exhausting can be carried out. By means of the arrangement, the clearance volume of the rotational compressor can be reduced, and the energy efficiency of the compressor can be improved.

Description

technical field [0001] The present invention relates to the technical field of compressors, more specifically, to a rotary compressor and electrical products including the rotary compressor. Background technique [0002] The roller compressor consists of a cylinder, a rolling piston set in the cylinder, a cylinder head set at the upper and lower ends of the cylinder, and a slide plate set on the inner wall of the cylinder. As the rolling piston rolls in the cylinder, the rolling piston, the inner wall of the cylinder and the slide plate A suction chamber and a compression chamber are formed between them. [0003] In the prior art, an exhaust port is usually provided on the inner wall of the cylinder on the side of the slide plate close to the compression chamber. However, in the existing scheme, the volume change rate of the element volume gradually decreases in the exhaust stage, and the exhaust velocity in the early stage of exhaust Larger, while the exhaust velocity is s...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, an exhaust port is usually provided on the inner wall of the cylinder on the side of the slide plate close to the compression chamber. However, in the existing scheme, the volume change rate of the element volume gradually decreases in the exhaust stage, and the exhaust velocity in the early stage of exhaust Larger, while the exhaust velocity is smaller in the later stage of exhaust

[0004] Using the exhaust port of the existing scheme, when the rolling piston rotates through the exhaust port, the residual high-pressure gas in the volume of the exhaust port will flow back into the suction chamber to cause suction backflow, and there will be a large clearance volume, resulting in repeated work and other efficiency loss problem

[0005] Moreover, in the early stage of exhaust, the exhaust velocity is relatively high, and the exhaust resistance is relatively large, resulting in low energy efficiency of the compressor.

[0006] Therefore, how to solve the problems of the compressor in the prior art, the large clearance volume in the exhaust structure, and the low energy efficiency of the compressor has become an important technical problem to be solved by those skilled in the art.

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