CN112963980A - Cold head heat exchanger - Google Patents
Cold head heat exchanger Download PDFInfo
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- CN112963980A CN112963980A CN202110356251.3A CN202110356251A CN112963980A CN 112963980 A CN112963980 A CN 112963980A CN 202110356251 A CN202110356251 A CN 202110356251A CN 112963980 A CN112963980 A CN 112963980A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
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Abstract
A cold head heat exchanger belongs to the field of low-temperature heat exchange of a low-temperature refrigerator. The invention aims to solve the problems that the existing cold head heat exchanger has low heat exchange efficiency and can not meet the heat exchange requirements under different flow rates. The heat exchanger comprises a heat exchanger base, a plurality of first heat exchange partition plates, a plurality of second heat exchange partition plates and a heat exchange top plate which are sequentially arranged from bottom to top in parallel; the heat exchanger base is a circular groove body, two vertical partition plates are arranged on the heat exchanger base, the heat exchanger base is divided into a liquid inlet cavity and a liquid outlet cavity by the vertical partition plates, a liquid inlet is formed in a bottom plate of the liquid inlet cavity, and a liquid outlet is formed in a bottom plate of the liquid outlet cavity; the first heat exchange partition plate, the second heat exchange partition plate and the heat exchange top plate are all annular plate pieces, a rotary flow channel is formed among the plurality of plate pieces, a liquid inlet end of the rotary flow channel is communicated with a liquid inlet cavity on the heat exchanger base, and a liquid outlet end of the rotary flow channel is communicated with a liquid discharge cavity on the heat exchanger base. The invention is mainly used for heat exchange of working media.
Description
Technical Field
The invention belongs to the field of low-temperature heat exchange of a low-temperature refrigerator, and particularly relates to a cold head heat exchanger for a G-M refrigerator.
Background
With the development of superconducting technology, aerospace technology, biotechnology and infrared detection in various large scientific projects, the application field of cryogenic refrigeration technology is wider and wider, and a small cryogenic refrigerator is widely applied to the fields as a compact refrigeration device. The G-M refrigerator has different refrigerating capacities from a few watts to dozens of watts along with different temperature zones, in a low-temperature system, low-temperature working medium helium or nitrogen has high efficiency at low temperature, helium and nitrogen single substances are often used as low-temperature circulating working media, such as a liquid helium refrigerator system and a liquid nitrogen refrigerator, the G-M refrigerator provides precooling refrigerating capacity, a cold head is matched with a cold head heat exchanger, and helium or liquid nitrogen is cooled by a solid cold guide mode to obtain a supercooled working medium;
in order to increase the use efficiency of the cold quantity of the small-sized cryogenic refrigerator and reduce the loss of the cold quantity, the heat exchange efficiency of the cold head heat exchangers is extremely critical, most of the cold head heat exchangers are fixed in structure and are not easy to flexibly assemble to adapt to the heat exchange requirements under different flow rates, in the liquefying production process of helium, most of the cold head heat exchangers can only be matched with a single cryogenic refrigerator, the refrigerating capacity of the cold head of the single cryogenic refrigerator is low, and some practical production requirements are difficult to meet.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the existing cold head heat exchanger has low heat exchange efficiency and cannot meet the heat exchange requirements under different flow rates; further provides a cold head heat exchanger.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the cold-head heat exchanger comprises a heat exchanger base, a plurality of first heat exchange partition plates, a second heat exchange partition plate and a heat exchange top plate which are sequentially arranged from bottom to top in parallel;
the heat exchanger base is a circular groove body, two vertical partition plates are arranged on the heat exchanger base along the diameter direction, the circular groove body of the heat exchanger base is divided into two cavities by the two vertical partition plates, namely a liquid inlet cavity and a liquid outlet cavity, a liquid inlet is formed in the bottom plate of the liquid inlet cavity, and a liquid outlet is formed in the bottom plate of the liquid outlet cavity;
the first heat exchange partition plate, the second heat exchange partition plate and the heat exchange top plate are all annular plate pieces, a rotary flow channel is formed among the plurality of plate pieces, a liquid inlet end of the rotary flow channel is communicated with a liquid inlet cavity on the heat exchanger base, and a liquid outlet end of the rotary flow channel is communicated with a liquid outlet cavity on the heat exchanger base;
the cold head of the heat exchanger is connected with the heat exchange top plate.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the heat exchange device, the upper surface and the lower surface of the heat exchange partition plates are provided with the plurality of annular grooves, the heat exchange flow channel is formed between every two adjacent heat exchange partition plates, and liquid nitrogen flows through the plurality of heat exchange flow channels and passes through the plurality of layers of heat exchange surfaces, so that the volume of the cold head heat exchanger is more compact under the same heat exchange liquid volume, the cold head heat exchanger has a very high specific surface area, a larger heat exchange area can be realized under the condition of less copper consumption, and the cold loss is reduced, so that the heat exchange efficiency is improved;
2. the width, the height and the number of the flow channels of the heat exchange partition plates are variable, the pressure required by the flow channel with a narrower section is larger, and the relative heat exchange area is larger, so that the heat exchange efficiency can be effectively improved, the flow rate of the flow channel with a larger sectional area is larger at the same flow speed, and the heat exchange requirements under different flow rates are met by replacing different heat exchange partition plates;
3. the heat exchange partition plate is made of copper, so that the heat exchange coefficient of the copper is higher, and the heat exchange efficiency is improved; the heat exchanger base is made of stainless steel, so that the production cost is low, and the stainless steel heat exchanger base is beneficial to improving the dimensional accuracy of the heat exchanger base after being welded with the heat exchange partition plate;
4. the cold head heat exchanger is directly matched with a cold head of a low-temperature refrigerator, has a compact structure, and can reduce the loss of cold energy, thereby improving the heat exchange efficiency.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a cold head heat exchanger;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a schematic structural view of a heat exchanger base;
FIG. 5 is a side cross-sectional view of the heat exchanger base;
FIG. 6 is a top view of a first heat exchange membrane;
FIG. 7 is a cross-sectional view taken at FIG. 6B-B;
FIG. 8 is a top view of a second heat exchange separator plate;
FIG. 9 is a cross-sectional view taken at FIG. 8C-C;
FIG. 10 is a top view of a heat exchange top plate;
FIG. 11 is an isometric view of a heat exchange top plate;
FIG. 12 is a side cross-sectional view of the heat exchange top plate;
FIG. 13 is an assembled view of the cold head heat exchanger and refrigerator in their entirety;
FIG. 14 is an isometric view of FIG. 13;
fig. 15 is a bottom view of fig. 13.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings:
the first embodiment is as follows: as shown in fig. 1, fig. 2, fig. 3, and fig. 4, in this embodiment, the cold head heat exchanger includes a heat exchanger base 1, a plurality of first heat exchange partition plates 2, a plurality of second heat exchange partition plates 3, and a heat exchange top plate 4, which are sequentially arranged side by side from bottom to top; the heat exchanger base and the edge fins of the heat exchange partition plate form the side wall of the heat exchanger;
as shown in fig. 4 and 5, the heat exchanger base 1 is a circular groove body, two vertical partition plates 1-6 are welded in the groove body of the heat exchanger base 1 along the diameter direction of the heat exchanger base 1, one side wall of each vertical partition plate 1-6 is welded on the outer side wall of the circular groove body, the other side wall of each vertical partition plate 1-6 is welded on the inner side wall, the circular groove body of the heat exchanger base 1 is divided into two cavities with equal volumes by the two vertical partition plates 1-6, the two cavities are respectively a liquid inlet cavity 1-2 and a liquid outlet cavity 1-1, a liquid inlet 1-5 is formed in the bottom plate of the liquid inlet cavity 1-2, and a liquid outlet 1-4 is formed in the bottom plate of the liquid outlet cavity 1-;
as shown in fig. 13, 14 and 15, in this embodiment, two small cryocoolers 6, two vacuum isolation cylinders 5, a first liquid delivery pump 7, a second liquid delivery pump 8, a liquid outlet pipe 9, a first liquid inlet pipe 10, a second liquid inlet pipe 11 and an impeller 12 are provided, each small cryocooler 6 is fixedly connected with a vacuum isolation cylinder 5, the vacuum isolation cylinder 5 is connected with a cold head, the cold head is fixedly connected with a heat exchange top plate 4, the small cryocooler 6 performs refrigeration, cold energy is transmitted to the heat exchange top plate 4 through the vacuum isolation cylinder 5 and the cold head, the first liquid delivery pump 7 is fixedly connected with the second liquid delivery pump 8, the second liquid delivery pump 8 is fixedly connected with the impeller 12, one liquid inlet of the impeller 12 is connected with a liquid inlet of the first liquid inlet pipe 10, a liquid outlet of the first liquid inlet pipe 10 is fixedly connected with liquid inlets 1-5 of a heat exchanger base, and the other liquid inlet of the impeller 12 is connected with, the liquid inlet of the liquid outlet pipe 9 is connected with liquid outlets 1-4;
as shown in fig. 3, the plurality of first heat exchange partition plates 2, the plurality of second heat exchange partition plates 3 and the plurality of heat exchange top plates 4 are all circular plate pieces, a group of concentric circular flow channels are formed after the upper and lower adjacent two heat exchange plate pieces are matched with each other, and a rotary flow channel is formed between the plurality of plate pieces, namely, a liquid inlet channel and a liquid outlet channel which are not communicated with each other are formed between the adjacent two first heat exchange partition plates 2, a liquid inlet channel and a liquid outlet channel which are not communicated with each other are formed between the first heat exchange partition plate 2 and the second heat exchange partition plate 3 which are positioned at the top layer, a heat exchange channel is formed between the second heat exchange partition plate 3 and the heat exchange top plate 4, the upper and lower adjacent liquid inlet channels are communicated with each other, the liquid inlet channel is communicated with the liquid outlet channel through the heat exchange channels, the whole liquid inlet channel is communicated with the liquid outlet, the liquid outlet end of the rotary flow passage is communicated with a liquid discharge cavity 1-1 on the heat exchanger base 1; the cold head of the heat exchanger is connected with the heat exchange top plate 4 and used for transmitting the cold energy of the cold head.
The cold heads of the two heat exchangers are matched with the heat exchange top plate, cold energy is transmitted from top to bottom through heat conduction (the cold heads of the heat exchangers transmit the cold energy along the heat exchange top plate, the second heat exchange partition plate and the first heat exchange partition plate from top to bottom step by step), and liquid to be heated is subjected to heat exchange from bottom to top step by step, so that liquid nitrogen can fully exchange heat with the heat exchange partition plates and finally flows back to the heat exchanger base through the rotary flow channel to be discharged, and the heat exchange efficiency is;
the specific rotation process is as follows: the liquid conveying pump enters liquid inlet cavities from liquid inlets of the heat exchanger bases, then liquid inlet guide holes are formed in the liquid inlet flow channels formed by the upper heat exchange partition plate and the lower heat exchange partition plate, liquid nitrogen flows through the liquid inlet guide holes of the upper heat exchange partition plate at an angle of 180 degrees and enters the upper liquid inlet channel for heat exchange, so that the liquid nitrogen flows through the heat exchange channel at the top end and then enters the liquid drainage channel through the liquid outlet guide holes under the action of hydraulic pressure, and finally, the liquid cooled by the heat exchanger flows back to the heat exchanger bases and is discharged through the liquid outlets.
The second embodiment is as follows: as shown in fig. 6 and 7, in this embodiment, a plurality of first annular ribs 2-1 are concentrically arranged on the upper surface of the first heat exchange separator 2, a first annular groove 2-5 is formed between two adjacent first annular ribs 2-1, a plurality of fourth annular ribs 2-6 are concentrically arranged on the lower surface of the first heat exchange separator 2, a fourth annular groove 2-7 is formed between two adjacent fourth annular ribs 2-6, and the first annular ribs 2-1 and the fourth annular ribs 2-6 are arranged in a staggered manner;
the first annular rib 2-1 on the first heat exchange partition plate 2 is matched with the fourth annular groove 2-7 on the first heat exchange partition plate 2 on the upper layer thereof to support the first heat exchange partition plate 2 on the upper layer, and the first annular groove 2-5 on the first heat exchange partition plate 2 is matched with the fourth annular rib 2-6 on the first heat exchange partition plate 2 on the upper layer thereof to form a liquid inlet channel and a liquid outlet channel;
each first annular groove 2-5 is provided with two guide holes, namely a first liquid inlet guide hole 2-2 and a first liquid outlet guide hole 2-3, wherein the first liquid inlet guide hole 2-2 is communicated with the liquid inlet channel, and the first liquid outlet guide hole 2-3 is communicated with the liquid discharge channel; all the first liquid inlet diversion holes 2-2 on the liquid inlet channel are arranged in a row and are used for connecting the liquid inlet channel on the upper layer with the liquid inlet channel on the lower layer, and all the first liquid outlet diversion holes 2-3 on the liquid discharge channel are arranged in a row and are used for connecting the liquid discharge channel on the upper layer with the liquid discharge channel on the lower layer.
As shown in fig. 1, 2 and 3, at least one heat exchange partition plate is arranged between the heat exchanger base and the heat exchange top plate, three heat exchange partition plates are arranged in the embodiment, more heat exchange partition plates can effectively increase the heat exchange area, the liquid pressure is ensured, and the heat exchange efficiency can be effectively improved. Of course, the number of the heat exchange spacers can be reduced according to the liquid flow and the heat exchange amount so as to achieve the best heat exchange efficiency and economic benefit.
The width, height and runner figure of heat transfer baffle's runner (slot) are changeable in this application, and the required pressure of runner that the cross-section is narrower is bigger, and relative heat transfer area is bigger, can effectively improve heat exchange efficiency like this, and the bigger runner of sectional area is big more under the same velocity of flow, adapts to the heat transfer demand under the different flow through the heat transfer baffle of changing not unidimensional and quantity.
Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: as shown in fig. 4 and 6, in the present embodiment, two second vertical partition plates 2-4 are disposed on the upper surface of the first heat exchange partition plate 2 along the diameter direction, a notch is formed at a position of the lower surface of the first heat exchange partition plate 2 opposite to the vertical partition plates 2-4, and the plurality of first annular grooves 2-5 are divided into an air inlet region and an air outlet region between two adjacent first heat exchange partition plates 2 by matching the two second vertical partition plates 2-4 with the corresponding notches.
The height of the second vertical partition plate 2-4 is the same as that of the first annular convex rib 2-1, and the depth of the notch is the same as that of the fourth annular groove 2-7.
The other components and the connection mode are the same as those of the second embodiment.
The fourth concrete implementation mode: as shown in fig. 1, in the present embodiment, the lower surface of the first heat exchange separator 2 is a flat surface.
Other components and connection modes are the same as those of the third embodiment.
The fifth concrete implementation mode: as shown in fig. 8 and 9, in this embodiment, a plurality of second annular ribs 3-1 are concentrically arranged on the upper surface of the second heat exchange separator 3, a second annular groove 3-4 is formed between two adjacent second annular ribs 3-1, a plurality of third annular ribs 3-3 are concentrically arranged on the lower surface of the second heat exchange separator 3, a third annular groove 3-5 is formed between two adjacent third annular ribs 3-3, the second annular ribs 3-1 and the third annular ribs 3-3 are arranged in a staggered manner, that is, the second annular ribs 3-1 are arranged opposite to the third annular grooves 3-5, and the third annular ribs 3-3 are arranged opposite to the second annular grooves 3-4;
the first annular groove 2-5 on the first heat exchange partition plate 2 at the top layer is matched with the third annular rib 3-3 on the second heat exchange partition plate 3 to form a liquid inlet channel and a liquid outlet channel, and the first annular rib 2-1 on the first heat exchange partition plate 2 at the top layer is matched with the third annular groove 3-5 on the second heat exchange partition plate 3 to support the second heat exchange partition plate 3;
each second annular groove 3-4 is provided with two guide holes, namely a second liquid inlet guide hole 3-2 and a second liquid outlet guide hole 3-7, the second liquid inlet guide hole 3-2 is communicated with the liquid inlet channel, and the second liquid outlet guide hole 3-7 is communicated with the liquid discharge channel; all the second liquid inlet diversion holes 3-2 on the liquid inlet channel are arranged in a row and are used for connecting the liquid inlet channel on the lower layer with the air exchange channel on the upper layer, and all the second liquid outlet diversion holes 3-7 on the liquid discharge channel are arranged in a row and are used for connecting the liquid discharge channel on the lower layer with the heat exchange channel on the upper layer.
The other components and the connection mode are the same as those of the fourth embodiment.
The sixth specific implementation mode: as shown in fig. 8, in the present embodiment, one third vertical separation plate 3-6 is provided on the upper surface of the second heat exchange separator 3 along the diameter direction, and two notches are formed on the lower surface of the second heat exchange separator 3 along the diameter direction, wherein the position of one notch corresponds to the position of the third vertical separation plate 3-6;
the notches on the lower surface of the second heat exchange partition plate 3 are matched with the second vertical partition plates on the first heat exchange partition plate 2, and the first annular grooves 2-5 are divided into a liquid inlet area and a liquid outlet area.
The height of the third vertical partition plate 3-6 is the same as that of the second annular ridge 3-1, and the depth of the notch on the second heat exchange partition plate 3 is the same as that of the third annular groove 3-5.
The other components and the connection mode are the same as those of the fourth embodiment.
The seventh embodiment: as shown in fig. 10, 11 and 12, in the present embodiment, a plurality of fifth annular protruding ridges 4-4 are concentrically arranged on the lower surface of the heat exchange top plate 4, a fifth annular groove 4-6 is formed between two adjacent fifth annular protruding ridges 4-4, and a notch is formed on the lower surface of the heat exchange top plate 4 along the diameter direction;
the upper surface of the heat exchange top plate 4 is provided with a plurality of circular grooves 4-5, a plurality of heat exchange holes 4-1 are respectively formed in each circular groove 4-5 along the diameter direction, and each heat exchange hole 4-1 corresponds to one fifth annular rib 4-4;
the number of the heat exchangers matched with the refrigerators is adjusted by adjusting the number of the circular grooves, so that the heat exchangers have higher flexibility, can be matched with a plurality of refrigerators, and can increase or decrease the heat exchange partition plates according to use occasions.
Preferably, two circular grooves 4-5 are provided in this embodiment, the diameter of the two circular grooves 4-5 is in line with the diameter of the heat exchange top plate 4,
the second annular groove 3-4 on the second heat exchange partition plate 3 is matched with the fifth annular rib 4-4 to form a heat exchange channel, and the second annular rib 3-1 on the second heat exchange partition plate 3 is matched with the fifth annular groove 4-6 to support the heat exchange top plate 4;
the notch on the heat exchange top plate 4 is matched with the third vertical partition plate 3-6 on the second heat exchange partition plate 3 to separate the second liquid inlet diversion hole 3-2 and the second liquid outlet diversion hole 3-7 of the third vertical partition plate 3-6.
Other components and connection modes are the same as those of the sixth embodiment.
The specific implementation mode is eight: as shown in fig. 11, in this embodiment, a circular groove 4-3 is further formed on the periphery of the circular groove 4-5 of the heat exchange top plate 4 for connecting a cold head of a heat exchanger.
The other components and the connection mode are the same as those of the seventh embodiment.
The specific implementation method nine: in this embodiment, the first heat exchange partition plate 2, the second heat exchange partition plate 3 and the heat exchange top plate 4 are made of copper, and the heat exchanger base 1 is made of stainless steel.
The heat exchange partition plate is made of copper, so that the heat exchange coefficient of the copper is higher, and the heat exchange efficiency is improved; the heat exchanger base is stainless steel base, and manufacturing cost is lower, and stainless steel heat exchanger base helps improving with the welded dimensional accuracy of heat transfer baffle.
The other components and the connection mode are the same as those of the eighth embodiment.
The detailed implementation mode is ten: as shown in fig. 1, in this embodiment, the phase difference between the flow guide hole of each layer of heat exchange partition plate and the flow guide hole of the adjacent heat exchange partition plate is 180 °, and the first liquid inlet flow guide hole 2-2 and the first liquid outlet flow guide hole 2-3 are respectively located at the edge positions of two sides of the vertical partition plate 2-4; the second liquid inlet diversion hole 3-2 and the second liquid outlet diversion hole 3-7 are respectively positioned at the edge positions of two sides of the third vertical partition plate 3-6.
The cold-head heat exchanger of this application adopts ring shape form, and circular runner is cut apart into feed liquor section and goes out the liquid section, and the water conservancy diversion hole phase difference of adjacent heat transfer baffle 180 degrees, and the liquid nitrogen flows through 180 degrees in the feed liquor runner on every layer and goes out the liquid runner, and the feed liquor volume is the same with going out the liquid volume, can utilize the space to carry out the heat transfer the most, and heat exchange efficiency reaches the biggest, and runner symmetrical arrangement is most reasonable, and processing is also convenient.
The other components and the connection mode are the same as those of the ninth embodiment.
Claims (10)
1. A cold head heat exchanger is characterized in that: the heat exchanger comprises a heat exchanger base (1), a plurality of first heat exchange partition plates (2), a second heat exchange partition plate (3) and a heat exchange top plate (4) which are arranged side by side from bottom to top in sequence;
the heat exchanger base (1) is a circular groove body, two vertical partition plates (1-6) are arranged on the heat exchanger base (1) along the diameter direction, the circular groove body of the heat exchanger base (1) is divided into two cavities, namely a liquid inlet cavity (1-2) and a liquid outlet cavity (1-1), by the two vertical partition plates (1-6), a liquid inlet (1-5) is formed in the bottom plate of the liquid inlet cavity (1-2), and a liquid outlet (1-4) is formed in the bottom plate of the liquid outlet cavity (1-1);
the heat exchanger is characterized in that the first heat exchange partition plates (2), the second heat exchange partition plates (3) and the heat exchange top plate (4) are all circular plate pieces, a rotary flow channel is formed among the plurality of plate pieces, the liquid inlet end of the rotary flow channel is communicated with a liquid inlet cavity (1-2) on the heat exchanger base (1), and the liquid outlet end of the rotary flow channel is communicated with a liquid discharge cavity (1-1) on the heat exchanger base (1);
the cold head of the heat exchanger is connected with a heat exchange top plate (4).
2. A cold head heat exchanger according to claim 1, wherein: the upper surface of the first heat exchange partition plate (2) is concentrically provided with a plurality of first annular ribs (2-1), a first annular groove (2-5) is formed between every two adjacent first annular ribs (2-1), a plurality of fourth annular ribs (2-6) are concentrically arranged on the lower surface of the first heat exchange partition plate (2), a fourth annular groove (2-7) is formed between every two adjacent fourth annular ribs (2-6), and the first annular ribs (2-1) and the fourth annular ribs (2-6) are arranged in a staggered mode;
the first annular rib (2-1) on the first heat exchange partition plate (2) is matched with the fourth annular groove (2-7) of the first heat exchange partition plate (2) on the upper layer thereof to support the first heat exchange partition plate (2) on the upper layer, and the first annular groove (2-5) on the first heat exchange partition plate (2) is matched with the fourth annular rib (2-6) on the first heat exchange partition plate (2) on the upper layer thereof to form a liquid inlet channel and a liquid discharge channel;
each first annular groove (2-5) is provided with two guide holes, namely a first liquid inlet guide hole (2-2) and a first liquid outlet guide hole (2-3), the first liquid inlet guide hole (2-2) is communicated with the liquid inlet channel, and the first liquid outlet guide hole (2-3) is communicated with the liquid discharge channel.
3. A cold head heat exchanger according to claim 2, wherein: two second vertical partition plates (2-4) are arranged on the upper surface of the first heat exchange partition plate (2) along the diameter direction, notches are formed in the positions, opposite to the vertical partition plates (2-4), of the lower surface of the first heat exchange partition plate (2), and a plurality of first annular grooves (2-5) are divided into a liquid inlet area and a liquid outlet area between every two adjacent first heat exchange partition plates (2) through matching of the two second vertical partition plates (2-4) and the corresponding notches.
4. A cold head heat exchanger according to claim 3, wherein: the lower surface of the first heat exchange clapboard (2) at the bottom layer is a flat surface.
5. A cold head heat exchanger according to claim 2, 3 or 4, wherein: a plurality of second annular ribs (3-1) are concentrically arranged on the upper surface of the second heat exchange partition plate (3), a second annular groove (3-4) is formed between every two adjacent second annular ribs (3-1), a plurality of third annular ribs (3-3) are concentrically arranged on the lower surface of the second heat exchange partition plate (3), a third annular groove (3-5) is formed between every two adjacent third annular ribs (3-3), and the second annular ribs (3-1) and the third annular ribs (3-3) are arranged in a staggered mode;
a first annular groove (2-5) on the first heat exchange partition plate (2) at the top layer is matched with a third annular rib (3-3) on the second heat exchange partition plate (3) to form a liquid inlet channel and a liquid discharge channel, and a first annular rib (2-1) on the first heat exchange partition plate (2) at the top layer is matched with the third annular groove (3-5) on the second heat exchange partition plate (3) to support the second heat exchange partition plate (3);
each second annular groove (3-4) is provided with two guide holes, namely a second liquid inlet guide hole (3-2) and a second liquid outlet guide hole (3-7), the second liquid inlet guide hole (3-2) is communicated with the liquid inlet channel, and the second liquid outlet guide hole (3-7) is communicated with the liquid discharge channel.
6. A cold head heat exchanger according to claim 5, wherein: a third vertical partition plate (3-6) is arranged on the upper surface of the second heat exchange partition plate (3) along the diameter direction, two notches are formed in the lower surface of the second heat exchange partition plate (3) along the diameter direction, and the position of one notch corresponds to the position of the third vertical partition plate (3-6).
7. A cold head heat exchanger according to claim 6, wherein: a plurality of fifth annular convex ridges (4-4) are concentrically arranged on the lower surface of the heat exchange top plate (4), a fifth annular groove (4-6) is formed between every two adjacent fifth annular convex ridges (4-4), two circular grooves (4-5) are formed in the upper surface of the heat exchange top plate (4), the two circular grooves (4-5) are symmetrically arranged along the radial direction of the heat exchange top plate (4), a plurality of heat exchange holes (4-1) are respectively formed in each circular groove (4-5) along the diameter direction, and each heat exchange hole (4-1) corresponds to one fifth annular convex ridge (4-4);
the second annular groove (3-4) on the second heat exchange partition plate (3) is matched with the fifth annular rib (4-4) to form a heat exchange channel, and the second annular rib (3-1) on the second heat exchange partition plate (3) is matched with the fifth annular groove (4-6) to support the heat exchange top plate (4).
8. A cold head heat exchanger according to claim 7, wherein: the periphery of the circular groove (4-5) of the heat exchange top plate (4) is also provided with a circular groove (4-3).
9. A cold head heat exchanger according to claim 8, wherein: the first heat exchange partition plate (2), the second heat exchange partition plate (3) and the heat exchange top plate (4) are made of copper, and the heat exchanger base (1) is made of stainless steel.
10. A cold head heat exchanger according to claim 9, wherein: the phase difference between the diversion hole of each layer of heat exchange clapboard and the diversion hole of the adjacent heat exchange clapboard is 180 degrees.
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| CN211346431U (en) * | 2019-10-29 | 2020-08-25 | 深圳市开迩文科技有限公司 | Cold head heat exchanger |
| CN111601489A (en) * | 2020-04-29 | 2020-08-28 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Multilayer tandem cascade liquid cooling plate |
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| CN111601489A (en) * | 2020-04-29 | 2020-08-28 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Multilayer tandem cascade liquid cooling plate |
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