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Heat voice magnetic refrigeration low temperature system

A low-temperature system, magnetic refrigeration technology, applied in refrigerators, refrigeration and liquefaction, gas cycle refrigerators, etc., can solve the problem of large refrigeration temperature difference and achieve high efficiency

Inactive Publication Date: 2008-10-01
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing magnetic refrigeration technology is still unable to achieve a large cooling temperature difference, such as a large temperature difference from room temperature to 120K and below 20K, it needs other methods to pre-cool its high-temperature end

Method used

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  • Heat voice magnetic refrigeration low temperature system
  • Heat voice magnetic refrigeration low temperature system
  • Heat voice magnetic refrigeration low temperature system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The structure of Example 1 is as follows figure 1 As shown, a thermoacoustic magnetic refrigeration cryogenic system with no moving parts includes a feedback tube (1), an elastic membrane (7), a room temperature end heat exchanger (2), a heat regenerator (3), and Heater (4), thermal buffer tube (5), room temperature end heat exchanger (6), resonance tube (8) at the tee, characterized in that it also includes a branch connected to the resonance tube (8) The U-shaped two-stage pulse tube refrigerator on the upper side and a magnetic refrigerator connected to the resonance tube (8) in the form of a branch. The two refrigerator systems are in a high-vacuum vacuum cover (32), of which there are two pulse tube refrigerators. The stage part and the magnetic refrigerator are located in the heat radiation screen (33). When heat enters the system from the heater (4), a temperature difference appears at both ends of the regenerator (3), and a temperature gradient is established in th...

Embodiment 2

[0039] Such as image 3 As shown, this embodiment uses a coaxial two-stage pulse tube refrigerator on the basis of embodiment 1 to replace the ordinary two-stage pulse tube refrigerator in embodiment 1, and the first-stage gas store and the second-stage gas store Combined into a gas reservoir, the use of coaxial vessels can make the structure more compact. In this embodiment, the primary regenerator (11) is made into a ring shape, and the primary vessel (13) is placed in the middle of the primary regenerator and coaxially arranged with the primary regenerator (11), at room temperature The end heat exchanger (10) is divided into three parts by a first-stage regenerator (11), a first-stage pulse tube (13) and a second-stage pulse tube (20), and the gas flow passages between the parts are not connected to each other.

Embodiment 3

[0041] Such as Figure 4 As shown, this embodiment adopts a single-stage U-shaped pulse tube refrigerator as the pre-cooling of the magnetic refrigerator, which can realize a low temperature device without moving parts in a higher temperature range of 120K to 20K.

[0042] It is easy to understand that a single-stage pulse tube refrigerator can also be arranged in a coaxial type.

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Abstract

A refrigeration low-temperature system of heat sound magnetic includes a feedback tube (1), a elastic membrane (7), a room temperature terminal heat-exchange facility (2), a heat regenerator (3), a heat regenerator (4), a heat buffer tube (5), a room temperature terminal heat-exchange facility (6), a resonating tube (8) at the three-way, and also includes a pulse-tube refrigerator jointing to the resonating tube (8) by branch path form and a magnetic refractor jointing to the resonating tube (8) by branch path form, two refractor system is placed in the vacuum hood (32) with high vacuum.

Description

Technical field [0001] The invention relates to a low temperature obtaining device, in particular to a thermoacoustic magnetic refrigeration low temperature system with no moving parts. Background technique [0002] The thermoacoustic Stirling engine has the advantages of high efficiency and no moving parts. Using it to drive the pulse tube refrigerator can realize a low temperature system with no moving parts. The system has the characteristics of long life and no maintenance. However, due to the low temperature environment below 30K, as the temperature further decreases, the volumetric heat capacity of the regenerator filler (usually stainless steel or lead material) will be much smaller than the volumetric heat capacity of the working fluid (helium). The cold storage function of the regenerator cannot be realized, as a result, it is difficult to further reduce the cooling temperature, and the cooling efficiency will also be greatly reduced. [0003] Compared with the gas refri...

Claims

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Application Information

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IPC IPC(8): F25B21/00F25B9/14
CPCF25B9/145F25B9/10F25B2309/1403F25B2309/1406F25B2309/1408F25B2309/14241
Inventor 吴张华罗二仓戴巍胡剑英
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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