Coolant counterflow preventing unit for scroll compressor

Abstract

The invention provides a device for preventing refrigerant from flowing backwards of a scroll compressor, which comprises a shell which forms a hermetic space inside, and forms a suction pipe for sucking the refrigerant and a discharge pipe for discharging the refrigerant; a fixing turbine disc which is provided with a spiral turbination and positioned in the hermetic space inside the shell; a moving turbine disc which is positioned in the hermetic space inside the shell, is provided with the spiral turbination, and is rotatablely combined with the fixing turbine disc and forms compression chambers; and a counter-flow preventing valve assembly which is arranged on a the discharge pipe or a refrigerant connecting pipe hermetically connected with the discharge pipe, opens or closes the inside of the discharge pipe according to the flow direction of the refrigerant discharged from the discharge pipe, and prevents the refrigerant from flowing backwards. The device for preventing counter-flow of the refrigerant of the scroll compressor can reduce the noise inside the scroll compressor when the refrigerant is discharged to a discharge chamber, reduce the discharge resistance of the refrigerant and reduce the pressure loss while preventing the discharged refrigerant from flowing backwards.

Description

technical field [0001] The invention belongs to the field of scroll compressors, and in particular relates to a method that can prevent the discharged refrigerant from flowing backward to the compression part, reduce the noise when the refrigerant is discharged to the discharge cavity inside the scroll compressor, reduce the discharge resistance of the refrigerant, and reduce the Scroll compressor refrigerant backflow prevention device for pressure loss. Background technique [0002] figure 1 It is a longitudinal sectional view of the internal structure of a prior art scroll compressor. Such as figure 1 As shown, the scroll compressor has a casing 110 forming a closed space inside, a compression part 130 installed inside the casing 110 to compress refrigerant, and a motor part 170 provided inside the casing 110 to provide power to the compression part 130 . [0003] On one side of the housing 110, a suction pipe 111 and a discharge pipe 113 for sucking and discharging ref...

AI Technical Summary

Problems solved by technology

Although the discharge pressure of the refrigerant is generated inside the discharge port 133 which communicates with the compression chamber (not shown), due to the discharged refrigerant, there is a certain internal pressure inside the discharge chamber (not shown), so when the scroll compressor is running or stopped , based on the valve device 144, there is a pressure difference between the compression chamber (not shown) and the discharge chamber (not shown), which makes the valve device 144 vibrate unstable and cause noise

[0009] In addition, since the valve device 144 is located on the upper part of the fixed scroll 131, the valve device 144 directly produces resistance to the refrigerant discharged from the compression chamber (not shown), causing pressure loss

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