CN213578187U - Low-temperature refrigerator based on Stirling refrigerator - Google Patents
Low-temperature refrigerator based on Stirling refrigerator Download PDFInfo
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- CN213578187U CN213578187U CN202022345251.7U CN202022345251U CN213578187U CN 213578187 U CN213578187 U CN 213578187U CN 202022345251 U CN202022345251 U CN 202022345251U CN 213578187 U CN213578187 U CN 213578187U
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Abstract
The utility model discloses a low temperature refrigerator based on stirling refrigerator. The traditional cascade vapor compression refrigeration system has low efficiency and is unreliable. The utility model discloses a refrigerator box back corresponds the freezer position and is provided with leads cold pipe, leads cold pipe and is both ends confined snakelike copper pipe. The Stirling refrigerator is arranged in the refrigerating working chamber, a cold head of the Stirling refrigerator penetrates through the heat-insulating partition plate, and the cold head is connected with the cold guide pipe through the flexible heat conduction piece. The flexible heat conduction member is a flexible metal sheet or metal mesh bent into a U shape or an S shape, has upper and lower arms, and can be elastically deformed in the longitudinal direction. The lower arm of the flexible heat conduction piece is welded with the cold head, and the upper arm of the flexible heat conduction piece is welded with one end of the cold conduction pipe. The utility model discloses a stirling refrigerator, refrigeration effect is good, and is energy-concerving and environment-protective to solved the stirling refrigerator cold head through flexible heat-conduction spare and shaken great, the noise is higher, the short scheduling problem of life-span.
Description
Technical Field
The utility model belongs to the technical field of the refrigeration, a cryocooler based on stirling refrigerator is related to.
Background
With the rapid development of biological and medical industries, the requirement of the ultra-low temperature refrigerator for long-term storage of biological materials such as related biological and medical samples and reagents is increasing. Such ultra-low temperature refrigerators generally require a storage temperature below-70 ℃ and a stable refrigeration system to realize long-term reliable storage of biological materials. However, the deep cooling refrigerator industry in China is in a blank stage for a long time, and foreign brands always occupy the market domination position.
The novel low-temperature refrigerator has relatively high refrigerating efficiency under a large-temperature-difference refrigerating working condition (refrigerating temperature difference is more than 60 ℃). Especially when the novel low-temperature refrigerating machine is applied to a refrigerating system of an ultra-low-temperature refrigerator below 70 ℃ below zero, the refrigerating efficiency of the novel low-temperature refrigerating machine can reach more than 2 times of that of a traditional cascade type vapor compression refrigerating system, and the novel low-temperature refrigerating machine has the obvious energy-saving advantage. Meanwhile, as the novel low-temperature refrigerator can not adopt oil lubrication, the common low-temperature oil blocking fault of the ultra-low-temperature refrigerator adopting vapor compression refrigeration is eliminated, and the system is more stable and reliable. Moreover, the novel cryogenic refrigerators usually adopt natural substances such as nitrogen, helium and the like as refrigeration working media, are more environment-friendly, and have wider application prospects along with the popularization of the application of the cryogenic refrigerator. Among these new cryocoolers, the stirling cryocooler has been widely used because of its simple structure, absence of moving parts at low temperature, reliable operation, low vibration, and long life.
Disclosure of Invention
The utility model aims at providing a low temperature refrigerator based on stirling refrigerator to the problem of current traditional cascade vapor compression refrigerating system inefficiency, unreliable etc.
The utility model discloses a refrigerator box and refrigerator door are provided with the freezer in the refrigerator box, are provided with the thermal insulation baffle in the refrigerator box, and the box of thermal insulation baffle below is the refrigeration studio, and the refrigerator box side at refrigeration studio place is opened there is the louvre.
The back of the refrigerator body is provided with a cold guide pipe corresponding to the position of the freezing chamber, the cold guide pipe is a snakelike copper pipe with two closed ends, and a refrigerant working medium is filled in the copper pipe.
And a Stirling refrigerating machine is arranged in the refrigerating working chamber, and heat exhausting fans are arranged on two sides of the Stirling refrigerating machine.
The cold head of the Stirling refrigerator penetrates through the heat-insulating partition plate, and the cold head is connected with the cold guide pipe through the flexible heat conduction piece.
The flexible heat conduction piece is a flexible metal sheet or a metal net, is provided with an upper arm and a lower arm, and can generate elastic deformation longitudinally.
Furthermore, the flexible heat conduction piece is an elastic body bent into a U shape or an S shape.
Further, the lower arm of the flexible heat conduction piece is welded with the cold head.
Furthermore, the bent parts of the snake-shaped cold guide pipe are distributed up and down, and the upper arm of the flexible heat conduction piece is welded with one end of the cold guide pipe and the bent part on one side of the cold guide pipe. Or the bent parts of the snake-shaped cold guide pipe are distributed left and right, and the upper arm of the flexible heat conduction piece is welded with one end of the cold guide pipe and the first straight line part.
The utility model discloses utilize stirling refrigerator feature of environmental protection, energy-conservation nature, be fit for cryogenic refrigeration's advantage, refrigeration effect can reach more than 2 times of traditional cascade vapor compression refrigerating system, has solved traditional vapor compression refrigerating system not energy-conservation, not environmental protection scheduling problem. Meanwhile, the working medium of the Stirling refrigerator is helium, so that the Stirling refrigerator is pollution-free and environment-friendly. The utility model discloses a flexible heat-transfer spare has solved that the cold head vibrations of stirling refrigerator are great, and the noise is higher, the short scheduling problem of life-span. Compared with the existing low-temperature refrigerator, the utility model discloses shake for a short time, with low costs, heat transfer efficiency is high, longe-lived, can not produce any pollution.
Drawings
FIG. 1 is an external view of the present invention;
FIG. 2 is a schematic view of the back structure of the present invention;
FIG. 3 is a schematic view of a flexible thermal conductor;
FIG. 4 is a schematic view of another flexible heat transfer element;
fig. 5 is a schematic view of the connection of the cold conducting pipe and the flexible heat-conducting member.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the following embodiments and the accompanying drawings.
As shown in fig. 1 and 2, the low-temperature refrigerator based on the stirling refrigerator for the working temperature range of-50 ℃ to-90 ℃ comprises a refrigerator body 1 and a refrigerator door 2, wherein a freezing chamber 3 is arranged in the refrigerator body 1.
A heat insulation partition plate 5 is arranged in the refrigerator body 1, a refrigeration working chamber 6 is arranged below the heat insulation partition plate 5, and heat dissipation holes 4 are formed in the side face of the refrigerator body where the refrigeration working chamber 6 is located. The back of the refrigerator body 1 is provided with a cold guide pipe 7 corresponding to the position of the freezing chamber 3, the cold guide pipe 7 is a snake-shaped copper pipe with two closed ends, refrigerant working media such as R404A, R503 and R508A are filled in the copper pipe, and the liquid filling rate is 30-40%.
The refrigerating working chamber 6 is internally provided with a Stirling refrigerator 8, and the working medium in the Stirling refrigerator is nitrogen. And heat exhausting fans 9 are arranged on two sides of the Stirling refrigerator 8, and the heat generated by the Stirling refrigerator 8 is exhausted out of the refrigerator box body through the heat radiating holes 4 by the heat exhausting fans 9.
A cold head 10 of the Stirling refrigerator 8 is arranged through the heat-insulation partition plate 5, and the cold head 10 is connected with the cold guide pipe 7 through a flexible heat conduction piece 11.
The flexible heat conducting member 11 is a flexible metal sheet or metal net bent into a U shape or S shape, and has upper and lower arms 11-1 and 11-2 capable of being elastically deformed in the longitudinal direction. As shown in fig. 3, the flexible heat conductor 11 is a flexible metal sheet bent in an S-shape; as shown in fig. 4, the flexible heat conductor 11 is a metal mesh bent in a U-shape.
The lower arm 11-2 of the flexible heat conduction member 11 is welded to the cold head 10, the upper arm 11-1 is welded to one end and one side of the cold conduction pipe 7 (when the bent portion of the cold conduction pipe 7 is distributed up and down, as shown in fig. 2), or the upper arm 11-1 is welded to one end and a first straight portion of the cold conduction pipe 7 (when the bent portion of the cold conduction pipe 7 is distributed left and right, as shown in fig. 5).
The cold head 10 of the Stirling refrigerator exchanges heat with the cold guide pipe 7 through the flexible heat conducting piece 11, and working media in the cold guide pipe 7 form oscillatory flow, so that cold energy is brought from the cold end to the hot end. The free piston Stirling refrigerator shakes about cold head 10 in the refrigeration process, has effectively reduced the vibration that the cold head brought through flexible heat conduction spare 11, and the noise is reduced has prolonged life. The adopted flexible heat conduction piece 11 is low in connection cost and simple in structure, and vibration is effectively reduced while heat conduction is realized.
Claims (5)
1. A low-temperature refrigerator based on a Stirling refrigerator comprises a refrigerator body (1) and a refrigerator door (2), wherein a freezing chamber (3) is arranged in the refrigerator body (1), a heat-insulating partition plate (5) is arranged in the refrigerator body (1), a refrigerator body below the heat-insulating partition plate (5) is a refrigerating working chamber (6), and heat dissipation holes (4) are formed in the side face of the refrigerator body where the refrigerating working chamber (6) is located; the method is characterized in that:
a cold guide pipe (7) is arranged on the back surface of the refrigerator body (1) corresponding to the position of the freezing chamber (3), the cold guide pipe (7) is a snake-shaped copper pipe with two closed ends, and a refrigerant working medium is filled in the copper pipe;
a Stirling refrigerator (8) is arranged in the refrigeration working chamber (6), and heat exhausting fans (9) are arranged on two sides of the Stirling refrigerator;
a cold head (10) of the Stirling refrigerator penetrates through the heat-insulating partition plate (5), and the cold head (10) is connected with the cold guide pipe (7) through a flexible heat conduction piece (11);
the flexible heat conduction piece (11) is a flexible metal sheet or a metal net, is provided with an upper arm (11-1) and a lower arm (11-2), and can generate elastic deformation in the longitudinal direction.
2. A stirling cooler based cryorefrigerator according to claim 1 wherein: the flexible heat conduction piece (11) is an elastic body bent into a U shape or an S shape.
3. A stirling cooler based cryorefrigerator according to claim 1 or claim 2 wherein: the lower arm (11-2) of the flexible heat conduction piece is welded with the cold head (10).
4. A stirling cooler based cryorefrigerator according to claim 3 wherein: the bent parts of the snake-shaped cold guide pipe (7) are distributed up and down, and the upper arm (11-1) of the flexible heat conduction piece is welded with one end of the cold guide pipe (7) and the bent parts at one side of the cold guide pipe.
5. A stirling cooler based cryorefrigerator according to claim 3 wherein: the bent part of the snake-shaped cold guide pipe (7) is distributed left and right, and an upper arm (11-1) of the flexible heat conduction piece is welded with one end of the cold guide pipe (7) and the first straight line part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022345251.7U CN213578187U (en) | 2020-10-20 | 2020-10-20 | Low-temperature refrigerator based on Stirling refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022345251.7U CN213578187U (en) | 2020-10-20 | 2020-10-20 | Low-temperature refrigerator based on Stirling refrigerator |
Publications (1)
| Publication Number | Publication Date |
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| CN213578187U true CN213578187U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022345251.7U Active CN213578187U (en) | 2020-10-20 | 2020-10-20 | Low-temperature refrigerator based on Stirling refrigerator |
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| CN (1) | CN213578187U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212537A (en) * | 2020-10-20 | 2021-01-12 | 浙江和利制冷设备有限公司 | Low-temperature refrigerator based on Stirling refrigerator |
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2020
- 2020-10-20 CN CN202022345251.7U patent/CN213578187U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212537A (en) * | 2020-10-20 | 2021-01-12 | 浙江和利制冷设备有限公司 | Low-temperature refrigerator based on Stirling refrigerator |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 321000 No.3, Nanqiao North Road, Lanjiang street, Lanxi City, Jinhua City, Zhejiang Province Patentee after: ZHEJIANG HELI REFRIGERATION EQUIPMENT Co.,Ltd. Address before: 310018 Industrial Park, nubu street, Lanxi City, Jinhua City, Zhejiang Province Patentee before: ZHEJIANG HELI REFRIGERATION EQUIPMENT Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |