Refrigeration screw compressor suction end base with check valve

Abstract

The invention relates to an F25B refrigeration machine, a refrigeration device or system class in international patent classification (IPC) through searching, and particularly belongs to a refrigeration screw compressor suction end base with a check valve. According to the technical scheme adopted by the invention, the refrigeration screw compressor suction end base comprises a suction end body (1), and is characterized in that an end body sealing surface (2) is made on the suction end body (1), and a check valve (3) is arranged on the end body sealing surface (2). The refrigeration screw compressor suction end base with the check valve has the beneficial effects that the check valve in a compressor replaces an external pipeline check valve, and thus the back flow on a high pressure side and a low pressure side of the compressor is effectively prevented to ensure that suction pipelines in the design of the compressor unit are more simplified, connecting parts of external pipelines are reduced, and refrigerating fluid leakage points are reduced; and due to the adoption of the structure design of the flap check valve, the convenience is brought for checking and cleaning a filter of the compressor, and the suction resistance can be effectively reduced and the refrigerating capacity of the compressor is increased.

Description

[0001] technical field [0002] After retrieval, the present invention relates to the category of F25B refrigerator, refrigeration equipment or system on the International Patent Classification (IPC), especially belongs to the suction end seat of refrigeration screw compressor with check valve. Background technique [0003] When the screw compressor works, it relies on the high-speed rotation of the twin screws to compress the refrigerant gas, and the compression of the gas generates a lot of heat. The cooling method of the screw compressor mainly relies on lubricating oil to cool the high-speed rotating screw and reduce the exhaust temperature. When the compressor After shutdown, due to the large pressure difference between the discharge side and the suction side of the screw compressor, the lubricating oil on the high pressure side will be pressed to the suction side or even into the suction pipeline. It will cause oil shock, which is very harmful to the compressor. To...

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Problems solved by technology

[0003] When the screw compressor works, it relies on the high-speed rotation of the twin screws to compress the refrigerant gas, and the compression of the gas generates a lot of heat. The cooling method of the screw compressor mainly relies on lubricating oil to cool the high-speed rotating screw and reduce the exhaust temperature. When the compressor After shutdown, due to the large pressure difference between the discharge side and the suction side of the screw compressor, the lubricating oil on the high pressure side will be pressed to the suction side or even into the suction pipeline. It will cause oil shock, which is very harmful to the compressor. To prevent this phenomenon, a check valve is usually installed in the external pipeline, but the effect is not good and the installation is inconvenient

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