Pre-cooling type JT throttling refrigerating machine
By placing the compression unit in the vacuum cover and directly coupling it with the cold head, and a linear drive mechanism is arranged in a normal temperature environment, the problems of low compression efficiency and high system complexity in the prior art are solved, and efficient and fast refrigeration effects and simplified system structure are achieved.
CN222634814UActive Publication Date: 2025-03-18TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information
- Application Number
- CN202421251702.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-03
AI Technical Summary
Technical Problem
The existing liquid helium temperature zone JT throttling refrigerator has low compression efficiency, slow cooling rate, and high system complexity and unreliability.
Method used
A pre-cooled JT throttling refrigerator is designed, and the compression unit is placed in the vacuum cover to improve output performance at low temperature; the compression unit is directly coupled to the cold head, removing multi-stage heat exchangers, and simplifying the system structure; the linear drive mechanism is arranged in a normal temperature environment to reduce heat and bring it into the refrigeration cycle.
Benefits of technology
It improves the system efficiency of the refrigerator, has fast cooling speed, high cooling capacity, simple system structure and high reliability.
✦ Generated by Eureka AI based on patent content.
Abstract
The utility model relates to the technical field of mechanical refrigeration, and provides a pre-cooling type JT throttling refrigerating machine which comprises a pre-cooler provided with a cold head. A linear driving mechanism; the compression unit is connected with the linear driving mechanism and outputs a high-pressure gas working medium under the action of the linear driving mechanism; the vacuum cover is used for providing a vacuum heat insulation effect; the compression unit and the cold head are coupled and are positioned in the vacuum cover; the heat exchanger is used for pre-cooling the high-pressure incoming flow gas by utilizing the backflow cold gas; the throttling valve penetrates through the heat exchanger and communicates with the high-pressure end of the compression unit; one end of the evaporator is connected with the throttle valve, and the other end penetrates through the heat exchanger and is connected with the low-pressure end of the compression unit. According to the utility model, the compression unit for driving the throttling working medium is placed in the vacuum cover at a low temperature, so that the output performance of the compression unit is improved, and the system efficiency of the refrigerator is improved; in addition, the compression unit is directly coupled with the cold head, the system structure is simplified, and the efficiency of the refrigerating system is improved.
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