Cabinet backboard heat exchange system

Abstract

The utility model discloses a cabinet backboard heat exchange system, which comprises a backboard, a fan and a heat exchange mechanism, the backboard is provided with a heat exchange cavity, and the inner side wall of the backboard is provided with an air inlet communicated with the heat exchange cavity; the inlet end of the fan is communicated with the heat exchange cavity, so that hot air in the cabinet passes through the heat exchange cavity and is discharged out of the cabinet; the heat exchange mechanism comprises a plurality of heat exchange pipes, and each heat exchange pipe is of a flat structure and is vertically arranged in the heat exchange cavity at intervals in the flowing direction of hot air. The heat exchanger has the advantages that the heat exchange pipes are of the flat structures, flow resistance borne by cold source media when the cold source media flow in the heat exchange pipes can be reduced, the flowability of the cold source media in the heat exchange pipes can be improved, in addition, the multiple heat exchange pipes of the flat structures are vertically arranged at intervals in the flowing direction of hot air, the heat exchange area can be increased, and wind resistance can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of control cabinets, in particular to a cabinet backboard heat exchange system. Background Art

[0002] Current server cabinets are usually equipped with a backplane heat exchange system for forced heat dissipation to meet the heat dissipation requirements of data center servers.

[0003] Backplane heat exchange systems are primarily used to cool servers in data centers. The backplane cooling door is mounted directly on the back of the data cabinet, offering advantages such as efficient heat exchange and energy conservation. Existing backplane heat exchange systems (such as the cabinet backplane cooling door disclosed in application number 201420413795.4) consist of a backplane frame, a heat exchanger with pipe joints, and multiple fans. The heat exchanger is fixed within the backplane frame, and the fans exhaust the hot air inside the cabinet through the backplane. As the hot air passes through the backplane, it exchanges heat with the cooling medium within the heat exchanger, thereby dissipating heat and cooling the interior of the cabinet. However, the cooling medium within the heat exchanger experiences significant flow resistance, resulting in poor fluidity within the heat exchanger and reduced heat exchange effectiveness. Furthermore, the heat exchanger has a small heat exchange area and high wind resistance. Utility Model Content

[0004] The purpose of this utility model is to overcome the above technical deficiencies and propose a cabinet back plate heat exchange system to solve the technical problems in the prior art of large flow resistance of the cold source medium inside the heat exchanger, small heat exchange area of the heat exchanger, and large wind resistance.

[0005] In order to achieve the above technical objectives, the technical solution of the present utility model provides a cabinet backplane heat exchange system, comprising:

[0006] The back plate has a heat exchange cavity, and an air inlet communicating with the heat exchange cavity is opened on the inner side wall of the back plate;

[0007] a fan, the inlet end of which is in communication with the heat exchange cavity, so that hot air inside the cabinet passes through the heat exchange cavity and is discharged outside the cabinet;

[0008] The heat exchange mechanism includes a plurality of heat exchange tubes, each of which is a flat structure and is vertically and spaced apart in the heat exchange cavity along the flow direction of the hot air. The lower end of each heat exchange tube is connected to the outlet end of the external cold source system, and the upper end of each heat exchange tube is connected to the inlet end of the external cold source system.

[0009] Furthermore, an air outlet connected to the heat exchange cavity is provided on the outer side wall of the back plate, and the fan is arranged in the heat exchange cavity, with its inlet end connected to the heat exchange cavity and its outlet end connected to the air outlet.

[0010] Furthermore, there are two air inlets, which are respectively opened at the upper end and the lower end of the inner side wall of the back plate.

[0011] Furthermore, there are a plurality of air outlets, each of which is spaced apart from top to bottom on the outer wall of the back plate. There are a plurality of fans, and the outlet end of each fan is connected to each air outlet in a one-to-one correspondence.

[0012] Furthermore, the back plate includes a plate body, a sealing plate and multiple fixed plates, the plate body is provided with the heat exchange cavity, one side of the heat exchange cavity is set as an opening, the sealing plate is detachably fixed to the plate body by screws to seal the opening of the heat exchange cavity, the two air inlets are both provided on the sealing plate, and each air outlet is provided on the plate body, each fixed plate is respectively abutted against the corresponding orifice of the air outlet, and is detachably fixed to the outer wall of the plate body by screws, each fixed plate is provided with multiple air outlet holes, each fan is detachably fixed to the corresponding fixed plate, and the outlet end of the fan is connected to each air outlet hole.

[0013] Furthermore, the heat exchange mechanism also includes a medium inlet pipeline and a medium outlet pipeline, one end of the medium inlet pipeline is connected to the outlet end of the external cold source system, and the other end of the medium inlet pipeline is connected to the lower end of each of the heat exchange tubes, one end of the medium outflow pipeline is connected to the inlet end of the external cold source system, and the other end of the medium outflow pipeline is connected to the upper end of each of the heat exchange tubes.

[0014] Furthermore, the medium inlet pipeline includes a medium inlet pipe and a first connecting pipe. The medium inlet pipe is horizontally arranged in the heat exchange cavity along the width direction of the back plate and is located directly below each of the heat exchange tubes. Both ends of the medium inlet pipe are sealed. A plurality of medium flow outlets are provided on the upper surface of the medium inlet pipe and spaced along its length direction. The lower end of each of the heat exchange tubes is respectively connected to the corresponding medium flow outlet. One end of the first connecting pipe is connected to the outlet end of the external cold source system, and the other end of the first connecting pipe is connected to the medium inlet pipe.

[0015] Furthermore, the medium outflow pipeline includes a medium outlet pipe and a second connecting pipe. The medium outlet pipe is horizontally arranged in the heat exchange cavity along the width direction of the back plate and is located directly above each of the heat exchange tubes. Both ends of the medium outlet pipe are sealed. The lower surface of the medium outlet pipe is provided with multiple medium inlets spaced apart along its length direction. The upper end of each of the heat exchange tubes is respectively connected to the corresponding medium inlet, one end of the second connecting pipe is connected to the inlet end of the external cold source system, and the other end of the second connecting pipe is connected to the medium outlet pipe.

[0016] Furthermore, the cabinet backplane heat exchange system also includes a water collection mechanism, which is arranged below each of the heat exchange tubes to collect condensed water on the outer wall of each of the heat exchange tubes and discharge the condensed water outside the cabinet.

[0017] Furthermore, the water collection mechanism includes a water collection trough and a drain pipe. The water collection trough is arranged in the heat exchange cavity and is located directly below each of the heat exchange tubes to collect condensed water on the outer wall of each of the heat exchange tubes. One end of the drain pipe is connected to the water collection trough, and the other end of the drain pipe extends to the outside of the back panel to discharge the condensed water outside the cabinet.

[0018] Compared with the prior art, the beneficial effects of the present invention include: when in use, the external cold source system continuously provides a cold source medium to each heat exchange tube, and the medium flows in each heat exchange tube. When the fan is turned on, the fan extracts the hot air inside the cabinet, so that the hot air inside the cabinet passes through the heat exchange cavity and is discharged outside the cabinet. In the process of the hot air passing through the heat exchange cavity, heat exchange occurs with the cold source medium in each heat exchange tube, and the temperature of the hot air decreases and is discharged outside the cabinet. The temperature of the cold source medium increases and flows back to the external cold source system. After being processed by the external cold source system, the temperature of the cold source medium decreases again and flows into each heat exchange tube again to exchange heat with the hot air, thereby continuously dissipating heat and cooling the inside of the cabinet. The heat exchange tube has a flat structure, which can reduce the flow resistance encountered by the cold source medium when flowing in the heat exchange tube, thereby improving the fluidity of the cold source medium in the heat exchange tube. In addition, multiple flat heat exchange tubes are arranged vertically and at intervals along the flow direction of the hot air, which can increase the heat exchange area and reduce wind resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of a cabinet back plate heat exchange system provided by the utility model;

[0020] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of a cabinet back panel heat exchange system omitting the sealing plate and heat exchange tubes;

[0021] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of a cabinet backplane heat exchange system from another perspective;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of a heat exchange mechanism in a cabinet back plate heat exchange system provided by the present invention, omitting some heat exchange tubes;

[0023] Figure 5 This is a structural diagram of a heat exchange mechanism in a cabinet backplane heat exchange system provided by the present invention;

[0024] In the figure: 100 - back plate, 110 - heat exchange chamber, 120 - air inlet, 130 - air outlet, 140 - plate body, 150 - sealing plate, 160 - fixed plate, 161 - air outlet, 200 - fan, 300 - heat exchange mechanism, 310 - heat exchange pipe, 320 - medium inlet pipeline, 321 - medium inlet pipe, 3211 - medium outlet, 322 - first connecting pipe, 330 - medium outlet pipeline, 331 - medium outlet pipe, 3311 - medium inlet, 332 - second connecting pipe, 400 - water collection mechanism, 410 - water collection tank, 420 - drain pipe. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] The utility model provides a cabinet back plate heat exchange system, the structure of which is as follows Figure 1 - Figure 5 As shown, it includes a backplate 100, a fan 200 and a heat exchange mechanism 300. The backplate 100 has a heat exchange cavity 110, and an air inlet 120 connected to the heat exchange cavity 110 is opened on the inner wall of the backplate 100; the inlet end of the fan 200 is connected to the heat exchange cavity 110, so that the hot air inside the cabinet passes through the heat exchange cavity 110 and is discharged outside the cabinet; the heat exchange mechanism 300 includes a plurality of heat exchange tubes 310, each of which is a flat structure and is vertically and spaced apart in the heat exchange cavity 110 along the flow direction of the hot air. The lower end of each heat exchange tube 310 is connected to the outlet end of the external cold source system, and the upper end of each heat exchange tube 310 is connected to the inlet end of the external cold source system.

[0027] During use, the external cold source system continuously provides a cold source medium to each of the heat exchange tubes 310. The medium flows in each of the heat exchange tubes 310. The fan 200 is turned on to extract the hot air inside the cabinet, so that the hot air inside the cabinet passes through the heat exchange cavity 110 and is discharged outside the cabinet. In the process of the hot air passing through the heat exchange cavity 110, heat exchange occurs with the cold source medium in each of the heat exchange tubes 310. The temperature of the hot air decreases and is discharged outside the cabinet. The temperature of the cold source medium increases and flows back to the external cold source system. After being processed by the external cold source system, the temperature of the cold source medium is reduced again and flows into each of the heat exchange tubes 310 again to exchange heat with the hot air, thereby continuously dissipating heat and cooling the interior of the cabinet. The heat exchange tubes 310 are flat structures, which can reduce the flow resistance encountered by the cold source medium when flowing in the heat exchange tubes 310, thereby improving the fluidity of the cold source medium in the heat exchange tubes 310. In addition, multiple flat-structured heat exchange tubes 310 are arranged vertically and at intervals along the flow direction of the hot air, which can increase the heat exchange area and reduce wind resistance.

[0028] As a preferred embodiment, the cold source medium used in the present application is fluorinated liquid, and the external cold source system used in the present application is a fluorinated liquid high-precision refrigeration unit, model SUNDI-320.

[0029] As a preferred embodiment, please refer to Figure 2 and Figure 3 An air outlet 130 communicating with the heat exchange chamber 110 is provided on the outer wall of the back plate 100. The fan 200 is arranged in the heat exchange chamber 110, with its inlet end communicating with the heat exchange chamber 110 and its outlet end communicating with the air outlet 130. The fan 200 can be accommodated by the heat exchange chamber 110. The heat exchange system of the back plate 100 can be integrated into one, and the hot air after heat exchange and cooling can be discharged through the air outlet 130.

[0030] As a preferred embodiment, please refer to Figure 1 There are two air inlets 120, which are respectively opened at the upper end and the lower end of the inner wall of the back plate 100, so that hot air can enter the heat exchange cavity 110 to form convection.

[0031] As a preferred embodiment, please refer to Figure 2 and Figure 3 There are multiple air outlets 130, and each of the air outlets 130 is spaced apart from top to bottom on the outer wall of the back plate 100. There are multiple fans 200, and the outlet end of each fan 200 is connected to each of the air outlets 130 in a one-to-one correspondence. By using multiple fans 200 to extract the air in the heat exchange chamber 110, the exhaust speed can be increased and the heat exchange efficiency can be increased.

[0032] As a preferred embodiment, please refer to Figure 1 and Figure 3 The back plate 100 includes a plate body 140, a sealing plate 150 and a plurality of fixing plates 160. The plate body 140 is provided with the heat exchange chamber 110. One side of the heat exchange chamber 110 is provided with an opening. The sealing plate 150 is detachably fixed to the plate body 140 via screws to seal the opening of the heat exchange chamber 110. The two air inlets 120 are both provided on the sealing plate 150. Each of the air outlets 130 is provided on the plate body 140. When the sealing plate 150 is removed, the components in the heat exchange chamber 110 can be inspected and maintained. Each of the fixing plates 160 abuts against the corresponding The openings of the air outlet 130 are detachably fixed to the outer wall of the plate body 140 via screws. Each of the fixing plates 160 is provided with a plurality of air outlet holes 161. Each of the fans 200 is detachably fixed to the corresponding fixing plates 160. The outlet end of the fan 200 is connected to each of the air outlet holes 161. When the fan 200 needs to be disassembled for inspection and repair, the corresponding fixing plate 160 is removed, and the fan 200 can be taken out of the air outlet 130. The fan 200 can be removed from the outside of the back plate 100 without opening the back plate 100, which is very convenient.

[0033] As a preferred embodiment, please refer to Figure 2 and Figure 3 The area of the fan 200 is smaller than the area of the air outlet 130 , making it easier for the fan 200 to be taken out of the air outlet 130 .

[0034] As a preferred embodiment, please refer to Figure 2 and Figure 4 The heat exchange mechanism 300 also includes a medium inlet pipeline 320 and a medium outlet pipeline 330. One end of the medium inlet pipeline 320 is connected to the outlet end of the external cold source system, and the other end of the medium inlet pipeline 320 is connected to the lower end of each of the heat exchange tubes 310. One end of the medium outflow pipeline 330 is connected to the inlet end of the external cold source system, and the other end of the medium outflow pipeline 330 is connected to the upper end of each of the heat exchange tubes 310. The liquid fluoride liquid in the external cold source system enters each of the heat exchange tubes 310 along the medium inlet pipeline 320. After heat exchange, the liquid fluoride liquid will evaporate into gaseous fluoride liquid and flow back to the external cold source system along the medium outflow pipeline 330. After being processed in the external cold source system, the gaseous fluoride liquid will become liquid fluoride liquid again and enter each of the heat exchange tubes 310 along the medium inflow pipeline 320 again.

[0035] As a preferred embodiment, please refer to Figure 4 and Figure 5 The medium inlet pipeline 320 includes a medium inlet pipe 321 and a first connecting pipe 322. The medium inlet pipe 321 is horizontally arranged in the heat exchange cavity 110 along the width direction of the back plate 100 and is located directly below each of the heat exchange tubes 310. Both ends of the medium inlet pipe 321 are sealed. A plurality of medium flow outlets 3211 are spaced apart on the upper surface of the medium inlet pipe 321 along its length direction. The lower end of each of the heat exchange tubes 310 is respectively connected to the corresponding medium flow outlet 3211. One end of the first connecting pipe 322 is connected to the outlet end of the external cold source system, and the other end of the first connecting pipe 322 is connected to the medium inlet pipe 321. The medium inlet pipe 321 can divert the liquid fluoride liquid so that the liquid fluoride liquid enters each of the heat exchange tubes 310 evenly.

[0036] As a preferred embodiment, please refer to Figure 4 and Figure 5 The medium outflow pipeline 330 includes a medium outlet pipe 331 and a second connecting pipe 332. The medium outlet pipe 331 is horizontally arranged in the heat exchange cavity 110 along the width direction of the back plate 100 and is located directly above each of the heat exchange tubes 310. Both ends of the medium outlet pipe 331 are sealed. The lower surface of the medium outlet pipe 331 is provided with a plurality of medium inlets 3311 spaced apart along its length direction. The upper end of each of the heat exchange tubes 310 is respectively connected to the corresponding medium inlet 3311. One end of the second connecting pipe 332 is connected to the inlet end of the external cold source system, and the other end of the second connecting pipe 332 is connected to the medium outlet pipe 331. The medium outlet pipe 331 can converge the gaseous fluorinated liquid, so that the gaseous fluorinated liquid in each of the heat exchange tubes 310 converges and enters the second connecting pipe.

[0037] As a preferred embodiment, please refer to Figure 2 The cabinet backplane heat exchange system also includes a water collection mechanism 400, which is arranged below each of the heat exchange tubes 310 to collect condensed water on the outer wall of each of the heat exchange tubes 310 and discharge the condensed water outside the cabinet to prevent the condensed water outside the heat exchange tubes 310 from entering the interior of the cabinet and causing a short circuit in the electrical equipment.

[0038] As a preferred embodiment, please refer to Figure 2The water collection mechanism 400 includes a water collection trough 410 and a drain pipe 420. The water collection trough 410 is arranged in the heat exchange chamber 110 and is located directly below each of the heat exchange tubes 310 to collect condensed water on the outer wall of each of the heat exchange tubes 310. One end of the drain pipe 420 is connected to the water collection trough 410, and the other end of the drain pipe 420 extends to the outside of the back plate 100 to discharge the condensed water outside the cabinet. The condensed water on the outer wall of each of the heat exchange tubes 310 flows downward under the action of gravity and enters the water collection trough 410, and then is discharged outside the cabinet along the drain pipe 420.

[0039] In order to better understand the present invention, the following Figure 1 - Figure 5 The working principle of the technical solution of the utility model is described in detail:

[0040] During use, the liquid fluoride in the external cold source system enters the medium inlet pipe 321 along the first connecting pipe 322. The medium inlet pipe 321 can divert the liquid fluoride so that the liquid fluoride enters each of the heat exchange tubes 310 evenly. The medium flows in each of the heat exchange tubes 310. The fan 200 is turned on. The fan 200 draws the hot air inside the cabinet into the heat exchange cavity 110 along the air inlet 120, and then is discharged to the outside of the cabinet by the fan 200 along the air outlet holes 161. In the process of the hot air passing through the heat exchange cavity 110, heat exchange is generated with the liquid fluoride in each of the heat exchange tubes 310. The temperature of the hot air is reduced and discharged to the outside of the cabinet. After the heat exchange, the liquid fluoride evaporates and becomes gaseous fluoride. The medium outlet pipe 331 can converge the gaseous fluoride so that each The gaseous fluorinated liquid in the heat exchange tube 310 enters the second connection respectively and flows back to the external cold source system. After being processed in the external cold source system, the gaseous fluorinated liquid becomes liquid fluorinated liquid again and enters each heat exchange tube 310 again to exchange heat with the hot air, thereby continuously dissipating heat and cooling the interior of the cabinet. The condensed water on the outer wall of each heat exchange tube 310 flows downward under the action of gravity and enters the water collecting tank 410, and then is discharged to the outside of the cabinet along the drain pipe 420. The heat exchange tube 310 has a flat structure, which can reduce the flow resistance encountered by the cold source medium when flowing in the heat exchange tube 310, thereby improving the fluidity of the cold source medium in the heat exchange tube 310. In addition, multiple flat-structured heat exchange tubes 310 are arranged vertically and at intervals along the flow direction of the hot air, which can increase the heat exchange area and reduce wind resistance.

[0041] The cabinet back plate heat exchange system provided by the utility model has the following beneficial effects:

[0042] (1) When the fan 200 needs to be disassembled for maintenance, the corresponding fixing plate 160 is removed, and the fan 200 can be taken out from the air outlet 130. The fan 200 can be removed from the outside of the back plate 100 without opening the back plate 100, which is very convenient.

[0043] (2) The condensed water on the outer wall of each heat exchange tube 310 flows downward under the action of gravity and enters the water collecting tank 410, and then is discharged to the outside of the cabinet along the drain pipe 420, so as to prevent the condensed water outside the heat exchange tube 310 from entering the interior of the cabinet and causing a short circuit in the electrical equipment;

[0044] (3) The heat exchange tube 310 is a flat structure, which can reduce the flow resistance encountered by the cold source medium when flowing in the heat exchange tube 310, thereby improving the fluidity of the cold source medium in the heat exchange tube 310. In addition, multiple flat heat exchange tubes 310 are arranged vertically and at intervals along the flow direction of the hot air, which can increase the heat exchange area and reduce wind resistance.

[0045] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A cabinet backplane heat exchange system, characterized in that: include: The back plate has a heat exchange cavity, and an air inlet communicating with the heat exchange cavity is provided on the inner wall of the back plate; a fan, the inlet end of which is in communication with the heat exchange cavity, so that hot air inside the cabinet passes through the heat exchange cavity and is discharged outside the cabinet; The heat exchange mechanism includes a plurality of heat exchange tubes, each of which is a flat structure and is vertically and spaced apart in the heat exchange cavity along the flow direction of the hot air. The lower end of each heat exchange tube is connected to the outlet end of the external cold source system, and the upper end of each heat exchange tube is connected to the inlet end of the external cold source system.

2. The cabinet back plate heat exchange system according to claim 1, characterized in that: An air outlet communicating with the heat exchange cavity is provided on the outer side wall of the back plate. The fan is arranged in the heat exchange cavity, with its inlet end communicating with the heat exchange cavity and its outlet end communicating with the air outlet.

3. The cabinet back plate heat exchange system according to claim 2, characterized in that: There are two air inlets, which are respectively opened at the upper end and the lower end of the inner side wall of the back plate.

4. The cabinet backplane heat exchange system according to claim 3, characterized in that: There are a plurality of air outlets, each of which is spaced apart from top to bottom on the outer wall of the back plate. There are a plurality of fans, and the outlet end of each fan is connected to each air outlet in a one-to-one correspondence.

5. The cabinet back plate heat exchange system according to claim 4, characterized in that: The back plate includes a plate body, a sealing plate and multiple fixed plates. The heat exchange cavity is opened on the plate body, and one side of the heat exchange cavity is opened. The sealing plate is detachably fixed to the plate body via screws to seal the opening of the heat exchange cavity. The two air inlets are opened on the sealing plate, and each air outlet is opened on the plate body. Each fixed plate is respectively abutted against the corresponding orifice of the air outlet and is detachably fixed to the outer wall of the plate body via screws. Each fixed plate is provided with multiple air outlet holes, and each fan is detachably fixed to the corresponding fixed plate, and the outlet end of the fan is connected to each air outlet hole.

6. The cabinet backplane heat exchange system according to claim 1, characterized in that: The heat exchange mechanism also includes a medium inlet pipeline and a medium outflow pipeline, one end of the medium inlet pipeline is connected to the outlet end of the external cold source system, and the other end of the medium inlet pipeline is connected to the lower end of each of the heat exchange tubes, one end of the medium outflow pipeline is connected to the inlet end of the external cold source system, and the other end of the medium outflow pipeline is connected to the upper end of each of the heat exchange tubes.

7. The cabinet back plate heat exchange system according to claim 6, characterized in that: The medium inlet pipeline includes a medium inlet pipe and a first connecting pipe. The medium inlet pipe is horizontally arranged in the heat exchange cavity along the width direction of the back plate and is located directly below each of the heat exchange tubes. Both ends of the medium inlet pipe are sealed. A plurality of medium flow outlets are provided on the upper surface of the medium inlet pipe and spaced along its length. The lower end of each of the heat exchange tubes is respectively connected to the corresponding medium flow outlet. One end of the first connecting pipe is connected to the outlet end of the external cold source system, and the other end of the first connecting pipe is connected to the medium inlet pipe.

8. The cabinet back plate heat exchange system according to claim 6, characterized in that: The medium outflow pipeline includes a medium outlet pipe and a second connecting pipe. The medium outlet pipe is horizontally arranged in the heat exchange cavity along the width direction of the back plate and is located directly above each of the heat exchange tubes. Both ends of the medium outlet pipe are sealed. The lower surface of the medium outlet pipe is provided with multiple medium inlets at intervals along its length direction. The upper end of each heat exchange tube is respectively connected to the corresponding medium inlet. One end of the second connecting pipe is connected to the inlet end of the external cold source system, and the other end of the second connecting pipe is connected to the medium outlet pipe.

9. The cabinet back plate heat exchange system according to claim 1, characterized in that: It also includes a water collection mechanism, which is arranged below each of the heat exchange tubes to collect condensed water on the outer side walls of each of the heat exchange tubes and discharge the condensed water outside the cabinet.

10. The cabinet back plate heat exchange system according to claim 9, characterized in that: The water collection mechanism includes a water collection trough and a drain pipe. The water collection trough is arranged in the heat exchange cavity and is located directly below each of the heat exchange tubes to collect condensed water on the outer wall of each of the heat exchange tubes. One end of the drain pipe is connected to the water collection trough, and the other end of the drain pipe extends to the outside of the back panel to discharge the condensed water out of the cabinet.

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