Oil lubrication compressor gas supplied circulating refrigerating device

Abstract

The invention relates to an oil lubrication valve compressor air feed recirculation refrigerator, comprising a high pressure end of a oil lubrication compressor, a water condenser, a high pressure air collector, an oil lubrication rotatable valve, a low pressure air collector and a low pressure end of the oil lubrication compressor sequentially connected, and a return circuit is formed, further comprising a balance air room and an elastic film box paralleled arranged between the condenser and the oil lubrication rotatable valve, the balance air room and the elastic film box are composed by a box provided with a small hole at the box wall and an elastic film arranged inside the box body, the inner cave of the elastic film box body is divided to two parts respectively communicated with the condenser and the oil lubrication rotatable valve. The damage of the elastic film caused by the abrupt decrease of the pressure on one side of elastic film in the process of starting the hypothermia process could be prevented, the high stability commercial oil lubrication compressor could be used to drive the condenser, simultaneously the pressure vibration frequency could be controlled according to the request of the condenser, The invention is a high reliability and low cost recirculation refrigerator.

Description

technical field [0001] The present invention mainly relates to a circulating refrigeration device in the field of refrigeration and low-temperature technology, and in particular to a circulating refrigeration device for supplying air from an oil-lubricated compressor. The oil-lubricated compressor is used to provide a stable pressure difference, and an oil-lubricated rotary valve is used to control the frequency to drive refrigeration. The refrigeration cycle of the machine uses an elastic diaphragm to prevent the lubricating oil from entering the refrigerator and can transmit sound work at the same time. In order to prevent the diaphragm from being damaged due to a sudden change in pressure on one side, a special diaphragm protection device and a balance air reservoir are also designed. . Background technique [0002] With the rapid development of science today, cryogenic technology is playing an increasingly important role, so many types of cryogenic refrigerators have bee...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of science today, cryogenic technology is playing an increasingly important role, so many types of cryogenic refrigerators have been developed, among which pulse tube refrigerators and thermoacoustic refrigerators have attracted people's attention because they have no moving parts at low temperatures , but since the system in the refrigerator must maintain a clean environment, it is not possible to directly use an oil-lubricated compressor and switching valve to provide pressure to the pulse tube refrigerator

Therefore, multi-stage oil separators or oil-free linear compressors are used, and the switching valve also needs oil-free lubrication. These measures greatly increase the cost and greatly reduce the service life.

[0003] The inventor of the present application, Luo Ercang, disclosed in the patent application with the application number CN200510011729.X an oil-lubricated planar rotary valve for GM type refrigerators, followed by an elastic film to prevent the oil lubricating oil from entering the refrigeration system. part, but the invention also has the following problems: (1) when the refrigerator is cooling, the internal temperature decreases and the pressure decreases, which will cause the elastic diaphragm to deviate from the original equilibrium position, making it unable to work normally, and also affecting the elasticity Diaphragm life

(2) When a sudden accident occurs in the refrigeration cycle (such as a sudden leakage of gas on one side of the elastic diaphragm), the elastic diaphragm cannot withstand such a large pressure difference and is damaged

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