Neon liquefying device

Abstract

The invention relates to the technical field of neon liquefaction, and discloses a neon liquefying device. The neon liquefying device comprises a two-stage refrigerating machine, a first-stage heat exchanger, a gas inlet pipe, a condenser, a gas conveying pipe, a Dewar tank, and a liquid conveying pipe, wherein the two-stage refrigerating machine is provided with a first-stage cold head and a second-stage cold head, the first-stage heat exchanger is connected with the first-stage cold head, the first-stage cold head provides cooling capacity for the first-stage heat exchanger, the gas inlet pipe is used for conveying external neon to the first-stage heat exchanger to be pre-cooled to a set temperature; the condenser is connected with the second-stage cold head, the second-stage cold head provides cooling capacity for the condenser, the gas conveying pipe communicates with the gas inlet pipe and is used for conveying the pre-cooled neon gas to the condenser, the pre-cooled neon gas is cooled to the boiling point temperature through the condenser and liquefied into liquid neon, the Dewar tank is used for storing the liquid neon, and the liquid conveying pipe is connected with the condenser and the Dewar tank and used for conveying the liquid neon to the Dewar tank. According to the neon liquefying device, neon can be effectively cooled, and the liquefaction rate of neon is increased.

Description

technical field [0001] The invention relates to the technical field of neon gas liquefaction, in particular to a neon gas liquefaction device. Background technique [0002] Refrigerants are required in many research tasks, such as the measurement of the Hall coefficient of high-purity substances at low temperatures, the cooling of Laiser, the cooling of computational control components, and in the acquisition of high and ultra-high vacuums. In the past, liquid hydrogen was used as a refrigerant, but due to careless use, the liquid hydrogen exploded and caused serious accidents. Neon (Ne) is a colorless, odorless, non-flammable rare gas. Liquid neon can obtain a service temperature in the range of 24 ~ 43K, so liquid neon can be used to replace liquid hydrogen. The latent heat of vaporization of liquid neon is very large, which is 3.3 times that of liquid hydrogen, that is, when the same volume of liquid evaporates, the cooling capacity obtained from liquid neon is 2.3 time...

AI Technical Summary

Problems solved by technology

[0003] At present, there are few neon gas liquefaction equipment, and the relatively similar neon gas liquefaction equipment is the neon liquefaction equipment using a Stirling cycle refrigerator. This process uses a bipolar regenerative refrigerator as a cold source, and uses a low-temperature solenoid valve to automatically discharge the liquid. Neon, however, the cryogenic solenoid valve will cause cold loss, and its design is correct or not directly affects whether the liquid neon can be discharged in time

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