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High efficiency low temperature heat transfer element based on natural circulation precooling process

A technology of natural circulation and heat transfer elements, which is applied in the direction of refrigerators, indirect heat exchangers, refrigeration and liquefaction, etc., and can solve the problems of limiting the cold transfer of refrigerators and the small diameter of copper rods

Inactive Publication Date: 2004-11-17
ZHEJIANG UNIV
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Problems solved by technology

At present, the commonly used connection method is to use copper rods to connect the cryogenic refrigerator and the object to be cooled. Due to the limitation of the cross-sectional area of ​​the cold head of the cryogenic refrigerator, the diameter of the copper rod is generally small, which greatly limits the transfer of the cooling capacity of the refrigerator.

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  • High efficiency low temperature heat transfer element based on natural circulation precooling process
  • High efficiency low temperature heat transfer element based on natural circulation precooling process
  • High efficiency low temperature heat transfer element based on natural circulation precooling process

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Embodiment Construction

[0009] The high-efficiency low-temperature heat transfer element based on the natural circulation pre-cooling process has a low-temperature liquid storage tank 1 and is connected with a low-temperature heat pipe 2 and a cold head 3 in sequence. The top of the liquid storage tank is connected, and the cooled object 4 is arranged on the cold head. The low-temperature liquid storage tank is provided with a low-temperature refrigerator 6 .

[0010] The material of the above-mentioned low-temperature heat pipe is stainless steel, copper, aluminum alloy, and its shape is circular or rectangular. The material of the natural circulation pre-cooling circuit is stainless steel, copper, aluminum alloy; the shape of the natural circulation pre-cooling circuit is round or square. The material of the cold head is copper or oxygen-free copper; the shape of the cooling medium storage tank is a cylindrical cavity or a rectangular cavity. Cryogenic liquids are: liquid helium, liquid hydrogen,...

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Abstract

The invention discloses a kind of high efficiency and low temperature heat conducting element based on natural circular precooling process. It has a low temperature liquid storage slot and which is connected with the low temperature pipe, cooling head, on the bottom of the low temperature liquid storage slot is set a natural circular precooling back flow and which is connected to the low temperature liquid storage top. When the natural circulation is stopped or nearly stopped, the low temperature pipe can transmits the emitted heat quantity to the cooling source directly with high efficiency; the temperature of the cooled object is maintained stable. The invention integrates the merits of the natural circulation and the low temperature pipes, and it can ensure the fluctuation of temperature is small.

Description

technical field [0001] The invention relates to a high-efficiency low-temperature heat transfer element based on a natural circulation precooling process, which can be used for rapid and continuous cooling of objects. Background technique [0002] With the development of cryogenic refrigerators, how to achieve rapid cooling of the object to be cooled is one of the key issues in the application of cryogenic refrigerators. At present, the commonly used connection method is to use copper rods to connect the cryogenic refrigerator and the object to be cooled. Due to the limitation of the cross-sectional area of ​​the cold head of the cryogenic refrigerator, the diameter of the copper rod is generally small, which greatly limits the transfer of the cooling capacity of the refrigerator. Experiments have proved that the low-temperature heat pipe can transfer several times more cold energy than copper rods under the same cross-sectional area, and its charact...

Claims

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Application Information

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IPC IPC(8): F25B9/14F28D15/00
CPCF25B23/006
Inventor 邱利民李炜征陈国邦甘智华
Owner ZHEJIANG UNIV
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