Helium Refrigerator

Basic Components of Helium Refrigerator in Liquid Helium Temperature Range

1,Circulating Gas System: Includes helium compressor, oil separator, and helium storage tank.

2,Liquid Helium Temperature Cold Box: A vacuum-insulated cold box containing multi-stage heat exchangers, helium turboexpander, internal adsorption cylinders, cryogenic valves, and measurement components.

3,Liquid Helium Storage System: Includes liquid helium Dewar, coaxial transfer line from cold box to Dewar, and liquid helium transfer line.

4,Control System: Includes hardware, software, configuration, and remote control.

5,Utilities: Includes liquid nitrogen storage tank, instrument air system, and cooling water system.

Figure 1: Basic Components of Helium Refrigerator System
① Helium compressor② Liquid helium temperature cold box③ Liquid helium Dewar④ Oil separator⑤ Control cabinet⑥ Coaxial transfer line⑦ Liquid nitrogen storage tank⑧ Helium storage tank

20K Helium Refrigerator

The 20K helium refrigerator uses a helium turbo reverse Brayton cycle to achieve cooling capacity at 20K. In this system, the cold helium gas below 20K cools the user equipment before returning to the cold box for cold recovery and recycling.

Main Components: Compressor,Oil filter,20K cold box (vacuum-insulated, with multi-stage heat exchangers, turboexpander, internal adsorber, cryogenic valves, and sensors),Control system and Helium buffer tank.

10kW@20K Helium Refrigerator

20K Helium Refrigerator

Small	Medium	Large
500-1000W	1000-2000W	＞2000W

Applications of Large-Scale Cryogenic Refrigerators (20K-2K) and Liquefiers

These systems are widely used in:

l Superconducting accelerators

l Nuclear fusion devices

l Superconducting high-field magnets

l Reactor cold neutron sources (CNS)

l Spallation neutron sources (SNS)

l Superconducting power equipment

l Superconducting maglev systems

l Space cryogenic environment simulation

l Helium recovery, liquefaction, and storage

l Hydrogen liquefaction and storage

They represent core technologies for large-scale scientific projects, aerospace, and new energy industries, reflecting national competitiveness.

4.5K Helium Refrigerator

Large-scale helium refrigerators use compressors to generate high-pressure helium. Part of the gas expands in turboexpanders for refrigeration, while the remainder is gradually cooled in multi-stage heat exchangers before being throttled through a Joule-Thomson valve to produce liquid helium for user equipment. The evaporated helium returns to the cold box for cold recovery and recycling. Such systems are called helium refrigerators.

4.5K Helium Refrigerator Key Performance Indicators

氦制冷机系列	制冷量W	压缩机额定功率kW
FHLR-40	160-250	79-90
FHLR-70	250-320	90-132
FHLR-100	320-450	132-160
FHLR-140	450-580	160-200
FHLR-180	580-750	200-250
FHLR-240	750-900	250-315
FHLR-280	900-1000	315-355
定制产品	≥1000