CN217082972U - JT throttling refrigeration system using low-temperature driver - Google Patents
JT throttling refrigeration system using low-temperature driver Download PDFInfo
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- CN217082972U CN217082972U CN202220266834.7U CN202220266834U CN217082972U CN 217082972 U CN217082972 U CN 217082972U CN 202220266834 U CN202220266834 U CN 202220266834U CN 217082972 U CN217082972 U CN 217082972U
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Abstract
The patent discloses an adopt JT throttle refrigerating system of low temperature driver, including precooler, low temperature driver, heat exchanger, throttling element, evaporimeter, cold shield, vacuum tank, elasticity cold chain wherein. In the JT system, a precooler precools a refrigeration working medium in a JT circulation pipeline, a driver is positioned in a low-temperature environment to drive the refrigeration working medium to perform unidirectional circulation, a throttling element generates a refrigeration effect, and the refrigeration capacity is obtained in an evaporator. The advantage of this patent lies in that the low temperature driver space volume that is used for driving refrigeration working medium unidirectional cycle is very little, and the precooler can be the low temperature driver heat dissipation and damping through the mode of elasticity cold chain conduction simultaneously, and this overall arrangement greatly reduced the consumption of low temperature driver, promoted JT refrigerator performance, satisfy the application demand of space miniaturization, low-power consumption refrigerator.
Description
Technical Field
This patent belongs to mechanical type refrigeration field for the space, and concretely designs a JT throttle refrigerating system who adopts low temperature driver.
Background
Aerospace is the most active and influential scientific and technical field in human understanding and natural process improvement, and is also an important mark for the high development of human civilization. The development of space detection technology provides basic conditions for human beings to know and utilize things outside the earth. In order to reduce interference and improve detection accuracy, the space detector must operate in a low temperature environment. The precooling type Joule-Thomson (JT) throttling refrigerating machine has the characteristics of high efficiency, long service life, small vibration and the like, and is a preferred scheme of a refrigerating system for a space exploration task. The JT uses the driving part as the key technology of the throttling refrigeration system, and the requirements of large pressure ratio, high reliability and long service life provide technical support for the development of the throttling refrigerator and the subsequent engineering application.
The driver is generally in a normal temperature environment and is fixedly connected with the JT component through a pipeline. In a normal temperature environment, the density of a refrigeration working medium is low, and in order to obtain enough refrigerating capacity, a large scavenging amount of a driver is needed to meet the requirement of a refrigeration system on mass flow, so that the volume of the driver is large; meanwhile, the driver can generate vibration in the operation process, and the influence on the refrigerating system can be generated to a certain extent. Adopt low temperature driver, can solve the too big problem of driver volume, simultaneously through damping spring, reduce the influence that low temperature driver vibration brought, give low temperature driver heat dissipation through the precooler, improve low temperature driver's output performance, be favorable to promoting JT refrigerating system's efficiency.
Disclosure of Invention
In view of the above problems and needs, it is an object of this patent to provide a JT throttle refrigeration system employing a cryogenic driver and a method for its implementation.
In order to achieve the purpose, the technical scheme adopted by the patent is as follows:
the JT throttling system adopting the low-temperature driver comprises a precooler 1, a low-temperature driver 2, a heat exchanger 3, a throttling element 4, an evaporator 5, a cold screen 6, a vacuum tank 7 and an elastic cold chain 8, and is characterized in that: the JT throttling system adopting the low-temperature driver is characterized in that a precooler 1 is connected with a low-temperature driver 2 through an elastic cold chain 8, the low-temperature driver 2 is connected with a heat exchanger 3, a throttling element 4 and an evaporator 5 through pipelines to form closed circulation, and a cold screen 6 and a vacuum tank 7 are fixed on the precooler 1 in a threaded connection mode.
The precooler 1 comprises a primary cold head 1-1 and a secondary cold head 1-2, and adopts a coaxial two-stage pulse tube refrigerator, a thermally coupled two-stage pulse tube refrigerator, an air-coupled two-stage pulse tube refrigerator, a Stirling two-stage pulse tube refrigerator, a G-M two-stage pulse tube refrigerator, a two-stage Stirling refrigerator, a Stirling pulse tube composite refrigerator or a two-stage G-M refrigerator; the precooler 1 precools a refrigeration working medium, wherein the refrigeration working medium comprises helium, hydrogen, neon or a mixed working medium thereof.
The low-temperature driver 2 comprises a high-temperature region low-temperature driver 2-1 or a low-temperature region low-temperature driver 2-2, wherein the high-temperature region low-temperature driver 2-1 adopts a direct-current linear compressor unit or an oil-free scroll compressor unit, and the low-temperature region low-temperature driver 2-2 adopts a direct-current linear compressor unit or an oil-free scroll compressor unit.
The heat exchanger 3 adopts a Linde type heat exchanger or a Hanpuson type heat exchanger.
The throttling element 4 adopts a metal orifice plate, and the aperture is micron-sized.
The evaporator 5 adopts a slit type evaporator, a spiral tube type evaporator, a needle rib type evaporator or a porous filling type evaporator.
The cold screen 6 is made of metal, has a cylindrical shape, and is fixed on the first-stage cold head 1-1 and the second-stage cold head 1-2 in the precooler 1 in a threaded manner.
The vacuum tank 7 is made of metal, is in a cylindrical structure in appearance, and is fixedly connected with the precooler 1 in a threaded connection mode.
The elastic cold chain 8 is made of a material with good elastic modulus and heat transfer performance, and the first-stage cold head 1-1 and the second-stage cold head 1-2 in the precooler 1 are respectively connected with and support the high-temperature-region low-temperature driver 2-1 and the low-temperature-region low-temperature driver 2-2 in the low-temperature driver 2.
Compared with the prior art, the advantage of this patent lies in:
(1) the driver is placed in a low-temperature environment, so that the diameter and the stroke of a piston of the driver can be effectively reduced, and the requirement on miniaturization is met;
(2) the low-temperature driver is coupled with the cold head of the precooler in an elastic cold chain mode, so that the influence caused by the running vibration of the low-temperature driver can be effectively reduced, and a good heat dissipation environment can be provided for the low-temperature driver;
(3) the JT throttling refrigeration system adopting the low-temperature driver has smaller power consumption for driving, and improves the efficiency and the economy of the system compared with a normal-temperature driver.
Drawings
FIG. 1 is a schematic structural diagram of the present patent;
fig. 2 is a schematic view of a modified structure 1 of the present patent;
FIG. 3 is a schematic view of a modified structure 2 of the present patent;
the numbers in the figures are as follows: the device comprises a precooler 1, a first-stage cold head 1-1, a second-stage cold head 1-2, a low-temperature driver 2-1, a high-temperature-region low-temperature driver 2-2, a low-temperature-region low-temperature driver 3, a heat exchanger 4, a throttling element 5, an evaporator 6, a cold screen 7, a vacuum tank 8 and an elastic cold chain.
Detailed Description
The patent is described in detail below with reference to the figures and the specific embodiments.
Fig. 1 is a block diagram of the JT throttle refrigeration system of this patent employing a cryogenic drive. The refrigerating working medium (helium, hydrogen, neon or the mixed working medium thereof) in JT cycle is precooled by the precooler 1 in the pipelines on the first-stage cold head 1-1 and the second-stage cold head 1-2 in the precooler, the low-temperature driver 2 is fixed on the first-stage cold head 1-1 and the second-stage cold head 1-2 in the precooler 1 through an elastic cold chain 8, and the elastic cold chain 8 is used for vibration damping and heat transfer. The refrigeration working medium is provided with unidirectional circulation flow through the low-temperature driver 2, is compressed by the high-temperature-region low-temperature driver 2-1 in the low-temperature driver 2, is compressed again through the low-temperature-region low-temperature driver 2-2 in the low-temperature driver 2 after heat exchange through the heat exchanger 3, enters the heat exchanger 3 to reach a certain low temperature, generates a refrigeration effect under the action of the throttling element 4, obtains a certain refrigeration capacity in the evaporator 5, then enters the heat exchanger 3 through a low-pressure pipeline, exchanges heat, enters the high-temperature-region low-temperature driver 2-1 in the low-temperature driver 2, and performs next circulation. The cold screen 6 arranged on the first-stage cold head 1-1 and the second-stage cold head 1-2 in the precooler 1 can reduce radiation heat leakage; the vacuum tank 7 provides a vacuum environment for the JT throttling refrigeration system.
The low-temperature driver 2 in the patent can be arranged on a first-stage cold plate 1-1 in the precooler 1, or on a second-stage cold plate 1-2 in the precooler 1, or can be arranged simultaneously, the stage number can be changed according to the requirement of a refrigeration system, and the specific implementation mode is consistent with the above.
Finally, it should be noted that: it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the embodiments and descriptions are only illustrative of the principles of the patent, and that various changes and modifications may be made without departing from the spirit and scope of the patent, which shall fall within the scope of the claims. The scope of the patent claims is defined by the appended claims and their equivalents.
Claims (8)
1. The utility model provides an adopt JT throttle refrigerating system of low temperature driver, includes precooler (1), low temperature driver (2), heat exchanger (3), throttling element (4), evaporimeter (5), cold shield (6), vacuum tank (7), elasticity cold chain (8), its characterized in that:
the precooler (1) is connected with the low-temperature driver (2) through an elastic cold chain (8), the low-temperature driver (2) is connected with the heat exchanger (3), the throttling element (4) and the evaporator (5) through pipelines to form closed circulation, the cold screen (6) is fixed on a first-stage cold head (1-1) and a second-stage cold head (1-2) in the precooler (1) in a threaded manner, and the vacuum tank (7) is fixed on the precooler (1) in a threaded manner; the elastic cold chain (8) is used for respectively interconnecting the first-stage cold head (1-1) and the second-stage cold head (1-2) in the precooler (1) and the high-temperature-region low-temperature driver (2-1) and the low-temperature-region low-temperature driver (2-2) in the low-temperature driver (2) and providing support for the high-temperature-region low-temperature driver and the low-temperature-region low-temperature driver.
2. A JT throttle refrigeration system using a cryogenic driver as in claim 1, wherein: the precooler (1) comprises a primary cold head (1-1) and a secondary cold head (1-2), and adopts a coaxial two-stage pulse tube refrigerator, a thermally coupled two-stage pulse tube refrigerator, an air-coupled two-stage pulse tube refrigerator, a Stirling two-stage pulse tube refrigerator, a G-M two-stage pulse tube refrigerator, a two-stage Stirling refrigerator, a Stirling pulse tube composite refrigerator or a two-stage G-M refrigerator; the precooler (1) is used for precooling a refrigeration working medium, wherein the refrigeration working medium comprises helium, hydrogen, neon or a mixed working medium thereof.
3. A JT throttle refrigeration system using a cryogenic driver as in claim 1, wherein: the low-temperature driver (2) comprises a high-temperature region low-temperature driver (2-1) or a low-temperature region low-temperature driver (2-2), wherein the high-temperature region low-temperature driver (2-1) adopts a direct-current linear compressor unit or an oil-free scroll compressor unit, and the low-temperature region low-temperature driver (2-2) adopts a direct-current linear compressor unit or an oil-free scroll compressor unit.
4. A JT throttle refrigeration system using a cryogenic driver as in claim 1, wherein: the heat exchanger (3) adopts a Linde type heat exchanger or a Hanpson type heat exchanger.
5. A JT throttle refrigeration system using a cryogenic driver as in claim 1, wherein: the throttling element (4) is a metal orifice plate, and the aperture is micron-sized.
6. A JT throttle refrigeration system using a cryogenic driver as in claim 1, wherein: the evaporator (5) adopts a slit type evaporator, a spiral tube type evaporator, a needle rib type evaporator or a porous filling type evaporator.
7. A JT throttle refrigeration system using a cryogenic driver as in claim 1, wherein: the cold shield (6) is made of metal and has a cylindrical shape.
8. A JT throttle refrigeration system using a cryogenic driver as in claim 1, wherein: the vacuum tank (7) is made of metal and has a cylindrical shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220266834.7U CN217082972U (en) | 2022-02-10 | 2022-02-10 | JT throttling refrigeration system using low-temperature driver |
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| CN202220266834.7U CN217082972U (en) | 2022-02-10 | 2022-02-10 | JT throttling refrigeration system using low-temperature driver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396738A (en) * | 2022-02-10 | 2022-04-26 | 中国科学院上海技术物理研究所 | JT throttling refrigeration system adopting low-temperature driver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396738A (en) * | 2022-02-10 | 2022-04-26 | 中国科学院上海技术物理研究所 | JT throttling refrigeration system adopting low-temperature driver |
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