Helium circulating system

Abstract

The invention discloses a helium circulating system comprising a helium cylinder, a heat exchanger, an evacuator, a pressure stabilizer, a first compressor, a second compressor, a temperature regulator, and an experimental segment. The output end of the helium cylinder is connected with the input end of the first compressor and the input end of the second compressor at the same time. The first compressor is connected with the pressure stabilizer. The pressure stabilizer is connected with the evacuator. The output end of the pressure stabilizer is connected to the input end of the second compressor. The output end of the second compressor is connected to the input end of the second compressor through a first flowmeter, forming a second compressor loop; the output end of the second compressor is connected to the input end of the temperature regulator through a second flowmeter, the output end of the temperature regulator is connected to the input end of the experimental segment, and the output end of the experimental segment is connected to the input end of the second compressor through the heat exchanger. The helium circulating system has the advantage that helium is fed into the experimental segment to provide the required low temperature or high temperature and pressure for the experimental segment.

Description

technical field [0001] The invention relates to the technical field of cooling processing, in particular to a helium circulation system for cooling an experimental section through helium flow. Background technique [0002] Helium is a colorless and odorless inert gas, it is difficult to chemically react with other substances, the boiling point of helium is low, only 4.3K (0.1MPa), it can store low-temperature helium, as a low-temperature cold source, it can make helium Gas is used as the cooling medium of the experimental system, and its inert characteristics allow helium to be used as the pressure-holding gas of the experimental system. When using helium as the pressure-holding medium, it is necessary to ensure the purity of the helium and reduce the air content in the helium. The prior art Among them, there is no system and device that can guarantee the purity of helium. In addition, in the prior art, helium will be discharged into the air after passing through the cooling...

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Problems solved by technology

[0002] Helium is a colorless and odorless inert gas, it is difficult to chemically react with other substances, the boiling point of helium is low, only 4.3K (0.1MPa), it can store low-temperature helium, as a low-temperature cold source, it can make helium Gas is used as the cooling medium of the experimental system, and its inert characteristics allow helium to be used as the pressure-holding gas of the experimental system. When using helium as the pressure-holding medium, it is necessary to ensure the purity of the helium and reduce the air content in the helium. The prior art Among them, there is no system and device that can guarantee the purity of helium. In addition, in the prior art, helium will be discharged into the air after being cooled by the device, resulting in waste of helium and cannot be recycled.

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