High Back Pressure Rotary Compressors

Abstract

The invention discloses a high back pressure rotary compressor. The compressor comprises the following parts: a cylinder, which is internally provided with a compression chamber, wherein the compression chamber is divided into an intake chamber and a discharge chamber; an exhaust valve, which comprises a valve seat and a valve block, wherein the valve seat is mounted on the cylinder and provided with a vent, and the valve block is used for opening and closing the vent; a pressure control device, which comprises a first pressure surface and a second pressure surface. The first pressure surface is communicated with the inside of the casing of the rotary compressor, the second pressure surface moves with the rotation of a piston in the cylinder and alternately communicates with the intake chamber and the discharge chamber; when the second pressure surface is in communication with the intake chamber, the pressure control device, under the action of the differential pressure between the first pressure surface and the second pressure surface, applies closing force to the valve block to close the vent. By setting the pressure control device, the valve block can be easily opened and closed in time, so as to avoid loss of exhaust gas and reduce exhaust noise of the high back pressure rotary compressor.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a high back pressure rotary compressor. Background technique [0002] In the related technology, the rotary compressor uses a reed valve. The greater the stiffness of the exhaust valve, the better the timeliness of closing the exhaust valve and the higher the reliability. However, the slower the opening of the exhaust valve, the slower the opening of the valve The smaller the range, the smaller the exhaust flow area and the greater the power consumption of the compressor. [0003] Especially for variable speed rotary compressors, when the compressor is running at high speed, more gas is discharged from the exhaust hole per unit time, and the gas force on the exhaust valve plate is relatively large. In order to ensure the timely closing of the exhaust valve plate, The exhaust valve plate is designed to have greater rigidity. However, when the compressor runs at low speed, th...

AI Technical Summary

Problems solved by technology

However, when the compressor runs at low speed, the gas force on the exhaust valve plate is small, and the high rigidity causes the exhaust valve plate to fail to fully open and flutter, resulting in a large loss of exhaust resistance and large pressure fluctuations in the exhaust chamber. , the compressor is noisy

Obviously, for the current exhaust valve, the stiffness of the exhaust valve plate affects the reliability and economy of the exhaust valve at the same time. When the compressor is running at variable speed, the stiffness of the exhaust valve plate ensures the timely closure of the exhaust valve at high speed It is inevitable that the performance and noise of the exhaust valve at low speed will be seriously affected

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