CN212487028U

CN212487028U - Server cabinet and liquid immersion cooling system

Info

Publication number: CN212487028U
Application number: CN202020629416.0U
Authority: CN
Inventors: 蓝滨; 龚路丽; 李翠
Original assignee: 3M China Ltd
Current assignee: 3M China Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-02-05
Anticipated expiration: 2030-04-23

Abstract

The utility model provides a server rack and liquid submergence cooling system. A server cabinet comprises a cabinet body, a cover plate and a movable covering part. The cabinet includes a cavity defined by a bottom wall and side walls of the cabinet, the cavity having an opening opposite the bottom wall, the cavity being configured to receive a computer server and to receive a liquid as a server immersion cooling medium. The cover plate openably covers the opening of the cavity. The covering part can cover the opening, and the area of the covering part covering the opening is adjustable.

Description

Server cabinet and liquid immersion cooling system

Technical Field

The utility model relates to a server rack and liquid submergence cooling system including server rack. And more particularly to a server cabinet and liquid immersion cooling system that can use a fluorinated liquid as a cooling liquid.

Background

In recent years, the problem of energy consumption of data centers is receiving more and more attention, and has become an important factor restricting sustainable development of the data center industry. With the increasing of the heat productivity of the server in the data center, the heat dissipation mode of the traditional air cooling and precise air conditioner is approaching to the limit. The water-cooled liquid cooling solution not only has complex structure and high cost, but also has the key hidden trouble that the long-term operation reliability of the system is influenced by the leakage problem of a plurality of pipeline interfaces.

At present, some manufacturers seek a full-immersion type heat dissipation cooling mode using high-insulation special liquid such as fluorinated liquid as an immersion medium, server system components can directly run in a liquid environment without additional sealing, and the temperature of each part can be equalized through natural convection of the liquid, so that a new solution is provided for the ever-increasing cooling requirements of data centers or computer servers. And corresponding to some fluorinated liquid, the mode not only utilizes the liquid convection of the fluorinated liquid, but also utilizes the characteristic of evaporation and heat absorption of the fluorinated liquid to provide more excellent heat dissipation effect and eliminate the hot spots of the system. For example, in the fluoride liquid full-immersion two-phase system, the boiling point of the fluoride liquid is relatively low, and once the temperature of the chip rises due to the increase of the program load at the parts such as a CPU (central processing unit) and a GPU (graphics processing unit) with concentrated heat generation, the liquid is heated and boiled nearby, the boiling point temperature of the liquid is kept unchanged during the boiling process, a large amount of steam formed in the thermal evaporation process is taken away through vaporization, secondary heat exchange is carried out between the condenser part at the upper part of a server cabinet and cooling water in the server cabinet, the liquid is liquefied again and reflows to reach the equilibrium state of spontaneous reciprocating circulation, and the aim of effectively controlling the temperature of the immersed chip is fulfilled. Certainly, a fully-immersed single-phase cooling system using the fluorinated liquid is also available, the boiling point of the fluorinated liquid is relatively high, and heat dissipated by components such as a server host and the like is mainly taken away by forced circulation and convection of the fluorinated liquid. And such cooling system, simple structure reduces unnecessary components such as fan interface, avoids potential safety hazards such as leakage, environmental pollution.

For the totally immersed heat dissipation mode of high insulating special liquid such as fluorinated liquid, whether single-phase type or two-phase type, there is a problem that should not neglect, that is the loss of liquid. The servers need to be overhauled frequently, and when an operator overhauls the servers, the cabinet soaking the servers needs to be opened to expose the liquid level in the air, so that the liquid with a certain temperature is vaporized and escaped, and the liquid used as the immersion cooling medium is less and less, and new liquid needs to be replenished from time to time. Therefore, how to reduce the loss of liquid is a technical problem to be overcome in the industry.

Therefore, there is a need to develop a server cabinet and a liquid immersion cooling system that minimize the loss of liquid as an immersion medium.

SUMMERY OF THE UTILITY MODEL

One of the objects of the present invention is to provide a server cabinet capable of reducing the loss of liquid as a server immersion cooling medium, and a liquid immersion cooling system including the server cabinet.

Therefore, according to an aspect of the present invention, there is provided a server cabinet, including a cabinet body. The cabinet includes a cavity defined by a bottom wall and side walls of the cabinet, the cavity having an opening opposite the bottom wall, the cavity being configured to receive a computer server and to receive a liquid as a server immersion cooling medium. The cabinet body also comprises a cover plate, and the cover plate can openably cover the opening of the cavity. Further, the server cabinet also comprises a movable covering part, the covering part can cover the opening, and the area of the covering part covering the opening is adjustable.

Optionally, the closure portion comprises a first closure member and a second closure member. The first closure member may be wrapped around an end of the first side wall of the cavity. The second closure member may be wrapped around an end of the second sidewall of the cavity. The first and second side walls are opposite side walls of the cavity. The first closure member and the second closure member are further configured to be extendable to interface with each other to enable complete coverage of the opening.

Optionally, the closure portion comprises at least two third closure members. The first end of the third cover part is rotatably fixed on the top end of the third side wall of the cavity, and the second end of the third cover part is detachably fixed on the top end of the fourth side wall of the cavity. The first end and the second end of the third cover component are opposite ends in the extending direction of the third cover component, and the third side wall and the fourth side wall of the cavity are opposite side walls of the cavity.

According to another aspect of the present invention, there is provided a liquid immersion cooling system, including the present invention provides a server cabinet, further including a cooling device. The server cabinet is communicated with the cooling device, so that the liquid in the server cabinet can flow into the cooling device to be cooled and then flows back into the server cabinet.

The utility model discloses have following beneficial effect: when a server disposed in a cabinet needs to be serviced, an operator first opens the cover plate. Because the utility model discloses the rack has the lid to close the portion, and the lid closes the portion and covers the open-ended area and be adjustable, therefore operating personnel then adjustable lid closes the portion so that the lid that the server that needs the maintenance corresponds closes the portion and put aside to operating personnel can take out this server and maintain it from the opening part of putting aside lid portion of closing. And the opening parts corresponding to other servers are still covered with the covering parts. Therefore, when the server is overhauled, the contact area of the cooling liquid and the air is reduced, the evaporation escape of the cooling liquid is reduced, and the loss of the cooling liquid is reduced. When the server is normally used, the cover plate and the covering part of the server cabinet cover the opening, and the opening of the cabinet is shielded and protected.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the following drawings only show some embodiments of the present invention by way of example, and that other drawings can be obtained by those skilled in the art without inventive work. Moreover, these drawings should not be construed as limiting the invention in any way.

Fig. 1 to 4 illustrate a server cabinet provided in an embodiment of the present invention;

fig. 5 to 8 illustrate a server cabinet according to another embodiment of the present invention;

fig. 9 illustrates a liquid submersion cooling system according to still another embodiment of the present invention.

Detailed Description

It should be noted that the following embodiments are exemplary illustrations of the present invention, and features in different embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with specific embodiments.

Fig. 1 to 4 illustrate a server cabinet 100 provided according to an embodiment of the present invention, which includes a cabinet 10, and the cabinet 10 includes a cavity 11. The cavity 11 is defined by a bottom wall 13 and

side walls

12, 14, 16, 18 of the cabinet 10, an opening 15 of the cavity 11 is opposite to the bottom wall 13, and the cavity 11 is configured to accommodate computer servers and to accommodate liquid. Wherein the first side wall 12 and the second side wall 14 are respectively arranged at two side walls of the cavity 11 in the horizontal extending direction. The third side wall 16 and the fourth side wall 18 are both side walls in the width direction of the cavity 11 (i.e., the direction perpendicular to the horizontal extending direction of the cavity 11), and are adjacent to the first side wall 12 and the second side wall 14, respectively.

The cabinet 10 further includes a cover 17, and the cover 17 openably covers the opening 15 of the cavity 11. Alternatively, the cover 17 may be a plate with one side pivotally connected to the top of one side wall of the cabinet 10. The pivoting mechanism is pivoted so as to cover the opening 15 or be opened from a cover state to open or cover the opening 15. Generally, as shown in fig. 1, the cover 17 is pivotally connected to the top end of the third side wall 16 of the cabinet 10.

The server cabinet 100 further includes a movable cover 20, the cover 20 can cover the opening 15, and the cover 20 is configured to cover the opening 15 with an adjustable area. In the embodiment shown in fig. 1, the closure portion 20 comprises a first closure element 21 and a second closure element 22. The first closure member 21 is configured to be wrapped around the top end of the first side wall 12, the second closure member 22 is configured to be wrapped around the top end of the second side wall 14, and the first and

second closure members

21, 22 may also extend into abutting engagement to completely cover the opening 15. It is understood that the first cover member 21 and the second cover member 22 may cover a part of the area of the opening 15, respectively, according to the actual use requirement. For example, the first and

second cover members

21 and 22 may be wrapped partially around the top ends of the first and second side walls 12 and 14, respectively, and partially extend over the opening 15.

As shown in fig. 2, the first cover member 21 and the second cover member 22 respectively include a housing 23 and a flexible film 24. The housing 23 includes a cavity (not shown) and a spool (not shown) disposed within the cavity. A first end of the flexible membrane 24 is secured to the spool and the flexible membrane 24 is arranged to be windable on the spool and extendable out of the housing to cover at least part of the opening 15. A second end of the flexible membrane 24 opposite to its first end is provided with a coupling element 25 to enable the flexible membranes 24 of the first and

second closure members

21, 22 to be butted together. Alternatively, the coupling element may be a magnetic strip, or a snap element or other structure having such functionality. For example, the coupling element 25 at the second end of the first closure member 21 may comprise a catch, and the coupling element 25 at the second end of the second closure member 2 may comprise a projection which releasably snaps into the catch. In this way, the flexible films 24 of the first and

second cover members

21 and 22 can be stretched to an intermediate position of the opening 15 to be bonded to each other to completely cover the opening to prevent the liquid in the chamber 11 from escaping.

As shown in fig. 3, the housings 23 of the first and second covers 21 and 22 may be fixed on the top ends of the third and

fourth sidewalls

16 and 18 of the cabinet 10, respectively, and respectively fit with the first and second sidewalls 12 and 14. The first cover member 21 is fixedly attached to the top portion of the first side wall 12 of the cabinet 10, and the second cover member 22 is fixedly attached to the top portion of the second side wall 14 of the cabinet 10. Alternatively, the tops of the third and

fourth sidewalls

16 and 18 near both ends of the first and second sidewalls 12 and 14 have stepped first grooves 27, respectively, and the housing 23 is fixed in the first grooves 27.

As shown in fig. 4, a plurality of slots 30 are respectively disposed at the top of the third and

fourth sidewalls

16 and 18 of the cabinet 10 at certain intervals. Thus, after the flexible film 24 of the first and

second cover members

21, 22 is rolled at a certain position, the two ends of the second end of the flexible film 24 can be received in the clamping slots 30 to fix the flexible film 24 at the certain position, leaving a part of the opening 15 for the operator to operate the server or the like in the cavity 11, while the non-operated area is still covered with the flexible film 24 to prevent the liquid in the cavity 11 from escaping. And to the cabinet body on the current market, during equipment such as server in operating personnel operation cavity 11, need expose opening 15 in the air completely, the utility model discloses the cabinet body has reduced the area that opening 15 exposes in the air to the exorbitant of liquid has been reduced.

Fig. 5 to 8 show a server cabinet 200 according to a second embodiment of the present invention. Similar to the server cabinet 100 provided in the first embodiment, the server cabinet 200 of this embodiment also includes a cabinet body 10 having a cavity 11 and a cover plate 17, which are not described herein again. The movable covering part 20 of the server cabinet 200 of the present embodiment includes at least two third covering parts 31. As shown in fig. 5 and 6, a first end of the third closure member 31 is rotatably secured to the top end of the third side wall 16 and a second end of the third closure member is detachably secured to the top end of the fourth side wall 18. Wherein the first end and the second end of the third cover member 31 are opposite ends in the horizontal extending direction thereof, and the third side wall 16 and the fourth side wall 18 are opposite side walls of the cavity 11. In the embodiment shown in the figures, the third 16 and fourth 18 lateral walls are opposite lateral walls in the width direction of the cavity 11, which is perpendicular to the horizontal extension direction of the cavity. The plurality of third lid members 31 cover the opening 15 of the cavity 11 across the width direction of the opening 15.

As shown in fig. 7, the third covering member 31 includes a flexible film 32, and a first fixing member 33 and a second fixing member 34 fixedly connected to both ends of the flexible film 32. The width of the flexible film 32 is smaller at the two ends than at the middle part, so that the middle parts of the flexible films 32 of the adjacent two third cover members 31 can be overlapped to better cover the opening 15, and the liquid escape is reduced.

As shown in fig. 8, the first fixing member 33 is fixed on the third side wall 16 of the cabinet body; and the second fixing piece 34 is detachably fixed on the fourth side wall 18 of the cabinet, that is, the second fixing piece 34 can be fixedly connected on the fourth side wall 18 of the cabinet or separated from the fourth side wall 18.

Preferably, the third side wall 16 has a second groove 33 along the horizontal extension direction of the cavity, and the first ends of the plurality of third cover members 31, i.e. the first fixing members 33, are fixedly installed in the second groove 33, preferably, installed at the lower part of the second groove 33; a third groove 34 is correspondingly formed in the fourth side wall 18 along the horizontal extending direction of the cavity, a clamping structure is arranged in the third groove 34, and the second fixing member 34 is removably fixed on the clamping structure. Thus, when the second fixing member 34 of the third covering member 31 is fixed, the flexible film 32 can be covered on the opening 15 in a tensioned state.

As shown in fig. 5 and 6, the first ends of two adjacent third cover members 31, i.e. the first fixing members 33, are fixed side by side on the top end of the third side wall 16 along the horizontal extending direction of the cavity. A plurality of third cover members 31 may be provided according to the length of the cabinet and the size and number of servers placed in the cavity. As shown in fig. 6, the first fixing members 33 of the first ends of the plurality of third cover members 31 may be sequentially disposed at the same horizontal position. Alternatively, as shown in fig. 5, the first fixing members 33 of the first ends of two adjacent third cover members 31 may be disposed at different horizontal positions, for example, the first fixing members 33 at odd-numbered positions are at one horizontal position, and the first fixing members 33 at even-numbered positions are at another horizontal position. In this way, the first fixing parts 33 of two adjacent third cover parts 31 are staggered in the height direction of the cabinet body to avoid touching the adjacent third cover parts 31 when moving one third cover part 31.

The cover 17 is provided with a plurality of clips 40, the clips 40 being arranged to secure the second end of the third closure member 31, i.e. the second retainer 34. Thus, when maintenance is required, the second fixing member 34 corresponding to the third cover member 31 on the server can be removed from the fourth side wall 18 and fixed to the cover plate 17, thereby exposing a part of the opening area for the operator to service the server.

In various embodiments of the present invention, the flexible film 24 may be a Polyester (PET) film, a Polyimide (PI) film or other organic films with good compatibility with the liquid used and its vapor. Preferably, a polyester film (PET) having a good flatness may be used. In addition, the thin films of the two adjacent flexible films 24 have mutually overlapped parts, and a self-wetting layer with weak viscosity can be arranged on the overlapping surface, so that the purpose of preventing liquid vapor from leaking from the overlapping gap is achieved. Specifically, the flexible film 24 may be a protective film product of 3M company, such as a model 87230(PET backing, silicone adhesive weak adhesion layer, total thickness of 0.065mm) or 87250 (total thickness of 0.115mm) product.

In various embodiments of the present invention, the cabinet 10 is further provided with a liquid inlet 110 (as shown in fig. 9) and a liquid outlet 120 (as shown in fig. 9) for the liquid in the cavity 11 to flow in and out. The liquid in the cavity 11 is preferably a fluorinated liquid, such as Fluorinert or Novec electronic fluorinated liquid available from 3M company, where "Fluorinert" and "Novec" are both registered trademarks of 3M fluorinated liquid products. The series of fluorinated liquid products not only have the advantages of stable substances, high insulation and no corrosion to other elements of the traditional fluorine refrigerant, but also eliminate the damage of ozone layer destruction due to the chemical structure of the fluorinated liquid products, have lower dielectric constant and meet the requirement of immersion use of server equipment on the capacitance of an immersion medium. The boiling point ranges of different types in the 3M fluorizated liquid series can be from 50 ℃ to 174 ℃, the temperature control requirements of different servers can be met, and the system can be selectively suitable for single-phase or two-phase immersion cooling systems. Currently, FC40(165 degree boiling point) in the Fluorinert series has been the target of choice for single phase immersion cooling liquids. The embodiment of the utility model provides a server rack can be applicable to single-phase or double-phase submergence cooling system.

Fig. 9 shows a liquid immersion cooling system 300 according to still another embodiment of the present invention, which includes a server cabinet provided in an embodiment of the present invention, a

server cabinet

100 or 200 provided in an embodiment of the present invention, a cooling device 150, and a pipeline 140 connecting the cavity of the

server cabinet

100 or 200 and the cooling device 150. The

server cabinet

100 or 200 has an inlet 110 at an upper portion thereof and an outlet 120 at a lower portion thereof. Alternatively, in other embodiments, the

server cabinet

100 or 200 is provided with an outlet 120 at the upper portion and an inlet 110 at the lower portion. A server 130 is placed within the cavity. Thus, the server 130 is immersed in the liquid as the cooling liquid, and the

server cabinet

100 or 200 and the cooling device 150 are communicated through the pipeline 140, so that the liquid in the server cabinet can flow into the cooling device to be cooled and then flow back into the server cabinet. The system preferably adopts high-insulation special liquid such as the fluorinated liquid as the immersion medium, so that the server system components can directly operate in a liquid environment without additional sealing, and the temperature of each part can be uniform through natural convection of the liquid.

It is to be understood that the above-described embodiments are merely illustrative and not restrictive of the current invention, and that modifications and variations may be resorted to without departing from the spirit and scope of the invention as those skilled in the art readily understand. Such modifications and variations are considered to be within the purview and scope of the invention and the appended claims. The scope of protection of the invention is defined by the appended claims. Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the invention. Use of the verb "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The indefinite article "a" or "an" preceding an element or step does not exclude the presence of a plurality of such elements or steps.

Claims

1. A server cabinet comprises a cabinet body,

the cabinet body comprises a cavity, the cavity is formed by surrounding a bottom wall and a side wall of the cabinet body, an opening of the cavity is opposite to the bottom wall, and the cavity is configured to accommodate a computer server and liquid;

the cabinet body also comprises a cover plate, and the cover plate can cover or open the opening of the cavity;

the portable type food packaging box is characterized by further comprising a movable covering part, the covering part can cover the opening, and the area of the covering part covering the opening is adjustable.

2. The server cabinet of claim 1, wherein the cover comprises a first cover configured to be wrapped around a top end of a first side wall of the cavity and a second cover configured to be wrapped around a top end of a second side wall of the cavity, and the first and second covers are also extendable to be mated with each other, wherein the first side wall and the second side wall are opposing side walls of the cavity.

3. The server cabinet of claim 2, wherein the first cover element is fixedly connected to a top of a third side wall and a fourth side wall of the cabinet body, the second cover element is fixedly connected to a top of a third side wall and a fourth side wall of the cabinet body, and the third side wall and the fourth side wall are adjacent to the first side wall and the second side wall.

4. The server cabinet according to claim 3, wherein the tops of the third and fourth sidewalls near two ends of the first and second sidewalls are respectively provided with a first groove, and the first and second cover members are respectively and correspondingly fixed in the first grooves.

5. The server cabinet of claim 2, wherein the first side wall and the second side wall are at respective ends of the cavity in the horizontal extension direction.

6. The server cabinet of claim 2, wherein the first and second cover members each include a housing and a flexible membrane, the housing including a cavity and a spool disposed within the cavity, a first end of the flexible membrane being secured to the spool, the flexible membrane being configured to be windable on the spool and extendable outside the housing to cover at least a portion of the opening.

7. The server cabinet according to claim 6, wherein the shells are respectively and correspondingly attached to the tops of the corresponding first side wall and the second side wall of the cabinet body.

8. The server cabinet of claim 6, wherein a second end of the flexible membrane opposite the first end thereof is provided with a coupling element to enable the flexibility of the first and second cover elements to be butted together.

9. The server cabinet according to claim 2, wherein a plurality of slots are respectively disposed at a certain distance at the top end of a third side wall and a fourth side wall of the cabinet body, and the third side wall and the fourth side wall are opposite and adjacent to the first side wall and the second side wall.

10. The server cabinet of claim 1, wherein the cover portion comprises at least two third cover members, a first end of each third cover member is rotatably fixed to a top end of a third side wall, and a second end of each third cover member is detachably fixed to a top end of a fourth side wall, wherein the first end and the second end of each third cover member are opposite ends in an extending direction of the third cover member, and the third side wall and the fourth side wall are opposite side walls of the cavity.

11. The server cabinet according to claim 10, wherein the third side wall and the fourth side wall are two opposite side walls in a width direction of the cavity, the width direction being perpendicular to a horizontal extension direction of the cavity.

12. The server cabinet of claim 10, wherein the third side wall has a second groove along a horizontal extension direction of the cavity, and the first end of the third cover element is fixedly installed in the second groove; the fourth side wall is provided with a third groove along the horizontal extension direction of the cavity, and the second end of the third cover element is removably arranged in the third groove.

13. The server cabinet of claim 10, wherein the third cover element comprises a flexible membrane.

14. The server cabinet of claim 6 or 13, wherein the width of the two end portions of the flexible membrane is smaller than the width of the middle portion.

15. The server cabinet of claim 10, wherein the first ends of two adjacent third cover elements are fixed side by side at the top end of the third side wall along the direction in which the cavity extends horizontally.

16. The server cabinet of claim 10, wherein the cover plate has a plurality of snaps disposed thereon, the snaps being configured to secure the second end of the third closure.

17. The server cabinet according to claim 6 or 13, wherein the flexible film is a polyester film or a polyimide film.

18. The server cabinet of claim 1, wherein the liquid is a fluorinated liquid.

19. The server cabinet according to claim 1, wherein the cabinet body is further provided with an inlet and an outlet for liquid in and out of the cavity.

20. A liquid submersion cooling system comprising a server cabinet as claimed in any one of claims 1 to 19, and further comprising a cooling means, the server cabinet being in communication with the cooling means such that liquid in the server cabinet can flow into the cooling means to be cooled and then flow back into the server cabinet.