Backplane heat dissipation system for node cabinet

Abstract

The utility model discloses a kind of backboard heat dissipation systems for node cabinet, it includes the indoor heat exchange system for absorbing heat in node cabinet, the indoor heat exchange system includes several backplate heat exchange units, each backplate heat exchange unit includes the heat exchanger being set on cabinet backplate, fan to the air supply of heat exchanger outer surface, with the input branch pipe being connected with heat exchanger import and with the output branch pipe being connected with heat exchanger export, the input branch pipe of each backplate heat exchange unit is connected with input main pipe, the output branch pipe of each backplate heat exchange unit is connected with output main pipe;The backboard heat dissipation system for node cabinet further includes the outdoor heat exchange system being connected with output main pipe and input main pipe.This backboard heat dissipation system for node cabinet carries out heat dissipation to each cabinet of data center or node computer room, instead of the whole space of computer room carries out heat dissipation, so by the mode of change from overall heat dissipation to partial heat dissipation, the PUE value of data center or node computer room can be effectively reduced, and energy-saving effect is good.

Description

Technical Field

[0001] This utility model relates to the fields of communication and server rack heat dissipation, specifically to a heat dissipation system for a node rack. Background Technology

[0002] The telecommunications industry is developing rapidly, with communication products constantly being updated and iterated. The development of 5G technology, big data, and cloud computing has propelled the industry to new heights. Both 5G technology and big data / cloud computing require massive amounts of data statistics, integration, and processing, while demanding minimal latency. This necessitates continuous improvements in hardware performance. As Moore's Law states regarding processors, improved hardware performance inevitably leads to increased heat dissipation. Currently, the heat flux density of 5G communication equipment and servers has reached 1.2 W / cm². 3 The temperature is so high, even higher, that heat dissipation technology faces severe challenges.

[0003] Faced with the dual pressures of ever-increasing energy consumption and sustainable economic and social development, accelerating the green transformation of data center operation models has become an urgent task. PUE is an indicator for evaluating the energy efficiency of data centers. PUE = Total Energy Consumption of Data Center / Energy Consumption of IT Equipment. The total energy consumption of data centers includes the energy consumption of IT equipment and the energy consumption of systems such as cooling and power distribution. A value greater than 1 and closer to 1 indicates that the non-IT equipment consumes less energy, that is, the better the energy efficiency level.

[0004] Currently, air conditioning systems are commonly used for cooling in data centers, but these systems consume a lot of energy, with the data center's PUE value typically ranging from 1.7 to 1.9. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a backplane heat dissipation system for node cabinets to solve the technical problem of high PUE value when using air conditioning systems for cooling and heat dissipation in old data centers or node computer rooms.

[0006] The present invention relates to a backplate heat dissipation system for node cabinets, comprising an indoor heat exchange system for absorbing heat inside the node cabinet. The indoor heat exchange system includes several backplate heat exchange units. Each backplate heat exchange unit includes a heat exchanger disposed on the backplate of the cabinet, a fan for blowing air to the outer surface of the heat exchanger, an input branch pipe connected to the inlet of the heat exchanger, and an output branch pipe connected to the outlet of the heat exchanger. The input branch pipe of each backplate heat exchange unit is connected to the input main pipe, and the output branch pipe of each backplate heat exchange unit is connected to the output main pipe.

[0007] The backplate heat dissipation system for node cabinets of this utility model also includes an outdoor heat exchange system connected to the output main pipe and the input main pipe. The outdoor heat exchange system is used to dissipate heat from the refrigerant output from the output main pipe and send the dissipated refrigerant into the input main pipe.

[0008] Furthermore, the heat exchanger is a microchannel heat exchanger or a tube-fin heat exchanger.

[0009] Furthermore, the outdoor heat exchange system includes a three-way valve, a tube-fin heat exchanger, a plate heat exchanger, a liquid storage tank, a pump, a vapor-liquid separator, a compressor, a condenser, and an electromagnetic expansion valve;

[0010] The inlet of the three-way valve is connected to the outlet main pipe, the first outlet of the three-way valve is connected to the inlet of the tube-fin heat exchanger, the outlet of the tube-fin heat exchanger is connected to the high-temperature medium inlet of the plate heat exchanger, the second outlet of the three-way valve is connected to the high-temperature medium inlet of the plate heat exchanger through a pipe, the high-temperature medium outlet of the plate heat exchanger is connected to the liquid storage tank, the inlet of the pump is connected to the liquid storage tank, and the outlet of the pump is connected to the input main pipe.

[0011] The low-temperature medium outlet of the plate heat exchanger is connected to the inlet of the vapor-liquid separator; the gas outlet of the vapor-liquid separator is connected to the inlet of the compressor; the outlet of the compressor is connected to the inlet of the condenser; the outlet of the condenser is connected to the inlet of the electromagnetic expansion valve; the liquid outlet of the vapor-liquid separator is connected to the inlet of the electromagnetic expansion valve; and the outlet of the electromagnetic expansion valve is connected to the low-temperature medium inlet of the plate heat exchanger.

[0012] Furthermore, the outdoor heat exchange system includes a first three-way valve, a secondary condenser, a vapor-liquid separator, a compressor, a main condenser, a bypass valve, a liquid storage tank, a pump, a second three-way valve, and an electromagnetic expansion valve;

[0013] The inlet of the first three-way valve is connected to the output main pipe; the first outlet of the first three-way valve is connected to the inlet of the auxiliary condenser; the outlet of the auxiliary condenser is connected to the liquid storage tank; the second outlet of the first three-way valve is connected to the inlet of the vapor-liquid separator; the gas outlet of the vapor-liquid separator is connected to the inlet of the compressor; the outlet of the compressor is connected to the inlet of the main condenser; the outlet of the main condenser is connected to the liquid storage tank; the liquid outlet of the vapor-liquid separator is connected to the liquid storage tank; the second outlet of the first three-way valve and the inlet of the main condenser are also connected through a bypass valve; the inlet of the pump is connected to the liquid storage tank; the outlet of the pump is connected to the inlet of the second three-way valve; the first outlet of the second three-way valve is connected to the inlet of the electromagnetic expansion valve; the outlet of the electromagnetic expansion valve is connected to the input main pipe; and the second outlet of the second three-way valve is connected to the output-input main pipe.

[0014] The beneficial effects of this utility model are:

[0015] 1. The backplane heat dissipation system for node racks of this utility model dissipates heat from each rack in the data center or node server room, rather than dissipating heat from the entire server room space. By changing the heat dissipation method from the whole space to the local space, the PUE value of the data center or node server room can be effectively reduced, resulting in good energy saving.

[0016] 2. The back panel heat dissipation system for node cabinets of this utility model has a compressor in its outdoor heat exchange system that can work according to the weather conditions. When the outdoor temperature is low, the refrigerant can directly exchange heat with the air through natural cooling, and the compressor does not work, which can further save energy consumption in the data center or node room. Attached Figure Description

[0017] Figure 1 A schematic diagram of the first embodiment of a backplane heat dissipation system for a node cabinet;

[0018] Figure 2 This is a schematic diagram of a second embodiment of a backplane heat dissipation system for node cabinets. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Example 1: As shown in Figure 1, the backplane cooling system for a node rack includes an indoor heat exchange system for absorbing heat within the node rack. The indoor heat exchange system comprises several backplane heat exchange units. Each backplane heat exchange unit includes a heat exchanger 2 mounted on the rack backplane 1, a fan 3 that blows air onto the outer surface of the heat exchanger, an input branch pipe 4 connected to the heat exchanger inlet, and an output branch pipe 5 connected to the heat exchanger outlet. The input branch pipes of each backplane heat exchange unit are connected to an input main pipe 6, and the output branch pipes of each backplane heat exchange unit are connected to an output main pipe 7. In this example, the heat exchanger is a microchannel heat exchanger or a tube-fin heat exchanger.

[0021] The backplane cooling system for the node cabinet also includes an outdoor heat exchange system connected to the output and input main pipes. This outdoor heat exchange system dissipates heat from the refrigerant output from the output main pipe and then sends the cooled refrigerant into the input main pipe. Specifically, the outdoor heat exchange system includes a three-way valve 8, a tube-fin heat exchanger 9, a plate heat exchanger 10, a liquid receiver 11, a pump 12, a vapor-liquid separator 13, a compressor 14, a condenser 15, and an electromagnetic expansion valve 16.

[0022] The inlet of the three-way valve 8 is connected to the output main pipe 7, the first outlet of the three-way valve 8 is connected to the inlet of the tube-fin heat exchanger 9, the outlet of the tube-fin heat exchanger 9 is connected to the high-temperature medium inlet of the plate heat exchanger 10, the second outlet of the three-way valve 8 is connected to the high-temperature medium inlet of the plate heat exchanger 10 through a pipe, the high-temperature medium outlet of the plate heat exchanger 10 is connected to the liquid storage tank 11, the inlet of the pump 12 is connected to the liquid storage tank 11, and the outlet of the pump 12 is connected to the input main pipe 6.

[0023] The low-temperature medium outlet of the plate heat exchanger 10 is connected to the inlet of the vapor-liquid separator 13, the gas outlet of the vapor-liquid separator 13 is connected to the inlet of the compressor 14, the outlet of the compressor 14 is connected to the inlet of the condenser 15, the outlet of the condenser 15 is connected to the inlet of the electromagnetic expansion valve 16, the liquid outlet of the vapor-liquid separator 13 is connected to the inlet of the electromagnetic expansion valve 16, and the outlet of the electromagnetic expansion valve 16 is connected to the low-temperature medium inlet of the plate heat exchanger 10.

[0024] In this embodiment, the liquid refrigerant in the storage tank 11 is pumped into the input main pipe 6 by the pump 12. Then, the input branch pipes 4 connected to the input main pipe 6 deliver the refrigerant to the heat exchangers 2 installed on the back panels 1 of each cabinet. The fans 3 inside the cabinets blow air onto the heat exchangers 2. The low-temperature refrigerant in the input branch pipes 4 exchanges heat with the hot air inside the cabinets through the heat exchangers 2, thereby removing heat from the cabinets. After absorbing heat, the liquid refrigerant in the heat exchangers 2 becomes a vapor-liquid two-phase system. Then, the vapor-liquid two-phase refrigerant enters the outdoor heat exchange system through the output branch pipes 5 and the input main pipe 6.

[0025] In cold weather, the refrigerant discharged from the output main pipe 7 can be cooled by natural cooling. At this time, the inlet and the first outlet of the three-way valve 8 are kept connected, and the tube-fin heat exchanger 9 is in working condition. The refrigerant discharged from the output main pipe 7 enters the tube-fin heat exchanger 9 and dissipates heat to cool down, thus changing from a two-phase vapor-liquid state to a single liquid state. The liquid refrigerator then enters the liquid storage tank 11 and is pumped into the input main pipe 6 by the pump 12.

[0026] In hot weather, the inlet and second outlet of the three-way valve 8 are kept connected. The gas-liquid two-phase refrigerant discharged from the output main pipe 7 directly enters the plate heat exchanger 10. At the same time, the liquid cooling medium, after being depressurized by the electromagnetic expansion valve 16, enters the plate heat exchanger 10. In the plate heat exchanger 10, the gas-liquid two-phase refrigerant dissipates heat to the liquid cooling medium and becomes a single liquid refrigerant, which then enters the liquid storage tank 11. The liquid cooling medium absorbs heat and becomes a vapor-liquid two-phase cooling medium, which enters the vapor-liquid separator 13. The liquid cooling medium separated by the vapor-liquid separator 13 flows back into the electromagnetic expansion valve 16, while the vapor cooling medium separated by the vapor-liquid separator 13 enters the compressor 14. After being compressed by the compressor 14, the vapor cooling medium enters the condenser 15 to dissipate heat and becomes a single liquid cooling medium, which then flows back into the electromagnetic expansion valve 16. The electromagnetic expansion valve 16 then depressurizes the liquid cooling medium before it enters the plate heat exchanger 10.

[0027] Example 2: As shown in Figure 2, the backplane cooling system for the node rack includes an indoor heat exchange system for absorbing heat within the node rack. The indoor heat exchange system comprises several backplane heat exchange units. Each backplane heat exchange unit includes a heat exchanger 2 mounted on the rack backplane 1, a fan 3 that blows air onto the outer surface of the heat exchanger, an input branch pipe 4 connected to the heat exchanger inlet, and an output branch pipe 5 connected to the heat exchanger outlet. The input branch pipes of each backplane heat exchange unit are connected to an input main pipe 6, and the output branch pipes of each backplane heat exchange unit are connected to an output main pipe 7. In this example, the heat exchanger is a microchannel heat exchanger or a tube-fin heat exchanger.

[0028] The backplane cooling system for the node cabinet also includes an outdoor heat exchange system connected to the output and input main pipes. This outdoor heat exchange system dissipates heat from the refrigerant output from the output main pipe and sends the cooled refrigerant into the input main pipe. Specifically, the outdoor heat exchange system includes a first three-way valve 17, a secondary condenser 18, a vapor-liquid separator 19, a compressor 20, a main condenser 21, a bypass valve 22, a liquid receiver 23, a pump 24, a second three-way valve 25, and an electromagnetic expansion valve 26.

[0029] The inlet of the first three-way valve 17 is connected to the output main pipe 7, the first outlet of the first three-way valve 17 is connected to the inlet of the auxiliary condenser 18, and the outlet of the auxiliary condenser 18 is connected to the liquid storage tank 23; the second outlet of the first three-way valve 17 is connected to the inlet of the vapor-liquid separator 19, the gas outlet of the vapor-liquid separator 19 is connected to the inlet of the compressor 20, the outlet of the compressor 20 is connected to the inlet of the main condenser 21, the outlet of the main condenser 21 is connected to the liquid storage tank 23, the liquid outlet of the vapor-liquid separator 19 is connected to the liquid storage tank 23, the second outlet of the first three-way valve 17 and the inlet of the main condenser 21 are also connected through the bypass valve 26, the inlet of the pump 24 is connected to the liquid storage tank 23, the outlet of the pump 24 is connected to the inlet of the second three-way valve 25, the first outlet of the second three-way valve 25 is connected to the inlet of the electromagnetic expansion valve 26, the outlet of the electromagnetic expansion valve 26 is connected to the input main pipe 6, and the second outlet of the second three-way valve 25 is connected to the output-input main pipe 6.

[0030] In cold weather, the inlet and the first outlet of the first three-way valve 17 are connected. The vapor-liquid two-phase refrigerant output from the output main pipe 7 is cooled by the auxiliary condenser 18 and becomes liquid refrigerant. The liquid refrigerant enters the liquid storage tank 23. The inlet and the second outlet of the second three-way valve 25 are connected. The pump 24 pumps the liquid refrigerant in the liquid storage tank 23 directly into the input main pipe 6.

[0031] In hot weather, the inlet and outlet of the first three-way valve 17 are connected, and the vapor-liquid two-phase refrigerant output from the output main pipe 7 enters the vapor-liquid separator 19. The liquid refrigerant separated by the vapor-liquid separator 19 enters the liquid storage tank 23, and the vapor refrigerant separated by the vapor-liquid separator 19 enters the large compressor 20. After being compressed by the compressor 20, the vapor refrigerant enters the main condenser 21 and dissipates heat to become liquid refrigerant, which then enters the liquid storage tank 23. The inlet of the second three-way valve 25 is connected to the first outlet, and the liquid refrigerant pumped by the pump 24 enters the input main pipe 6 after being depressurized by the electromagnetic expansion valve 26.

[0032] In practice, if the weather temperature is moderate, the bypass valve 22 can be opened. At this time, the vapor-liquid separator 19 and the compressor 20 do not work. The main condenser 21 dissipates heat and cools the vapor-liquid two-phase refrigerant. The inlet and outlet of the second three-way valve 25 are connected, and the liquid refrigerant in the liquid storage tank 23 is directly pumped into the input main pipe 6.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A backplane heat dissipation system for a node cabinet, characterized in that: The system includes an indoor heat exchange system for absorbing heat inside the node cabinet. The indoor heat exchange system includes several backplate heat exchange units. Each backplate heat exchange unit includes a heat exchanger installed on the backplate of the cabinet, a fan that blows air to the outer surface of the heat exchanger, an input branch pipe connected to the heat exchanger inlet, and an output branch pipe connected to the heat exchanger outlet. The input branch pipe of each backplate heat exchange unit is connected to the input main pipe, and the output branch pipe of each backplate heat exchange unit is connected to the output main pipe. The backplane cooling system for the node cabinet also includes an outdoor heat exchange system connected to the output manifold and the input manifold. The outdoor heat exchange system is used to dissipate heat from the refrigerant output from the output manifold and send the dissipated refrigerant into the input manifold.

2. The backplane heat dissipation system for node cabinets according to claim 1, characterized in that: The heat exchanger is a microchannel heat exchanger or a tube-fin heat exchanger.

3. The backplane heat dissipation system for node cabinets according to claim 1 or 2, characterized in that: The outdoor heat exchange system includes a three-way valve, a tube-fin heat exchanger, a plate heat exchanger, a liquid storage tank, a pump, a vapor-liquid separator, a compressor, a condenser, and an electromagnetic expansion valve. The inlet of the three-way valve is connected to the outlet main pipe, the first outlet of the three-way valve is connected to the inlet of the tube-fin heat exchanger, the outlet of the tube-fin heat exchanger is connected to the high-temperature medium inlet of the plate heat exchanger, the second outlet of the three-way valve is connected to the high-temperature medium inlet of the plate heat exchanger through a pipe, the high-temperature medium outlet of the plate heat exchanger is connected to the liquid storage tank, the inlet of the pump is connected to the liquid storage tank, and the outlet of the pump is connected to the input main pipe. The low-temperature medium outlet of the plate heat exchanger is connected to the inlet of the vapor-liquid separator; the gas outlet of the vapor-liquid separator is connected to the inlet of the compressor; the outlet of the compressor is connected to the inlet of the condenser; the outlet of the condenser is connected to the inlet of the electromagnetic expansion valve; the liquid outlet of the vapor-liquid separator is connected to the inlet of the electromagnetic expansion valve; and the outlet of the electromagnetic expansion valve is connected to the low-temperature medium inlet of the plate heat exchanger.

4. The backplane heat dissipation system for node cabinets according to claim 1 or 2, characterized in that: The outdoor heat exchange system includes a first three-way valve, a secondary condenser, a vapor-liquid separator, a compressor, a main condenser, a bypass valve, a liquid storage tank, a pump, a second three-way valve, and an electromagnetic expansion valve; The inlet of the first three-way valve is connected to the output main pipe; the first outlet of the first three-way valve is connected to the inlet of the auxiliary condenser; the outlet of the auxiliary condenser is connected to the liquid storage tank; the second outlet of the first three-way valve is connected to the inlet of the vapor-liquid separator; the gas outlet of the vapor-liquid separator is connected to the inlet of the compressor; the outlet of the compressor is connected to the inlet of the main condenser; the outlet of the main condenser is connected to the liquid storage tank; the liquid outlet of the vapor-liquid separator is connected to the liquid storage tank; the second outlet of the first three-way valve and the inlet of the main condenser are also connected through a bypass valve; the inlet of the pump is connected to the liquid storage tank; the outlet of the pump is connected to the inlet of the second three-way valve; the first outlet of the second three-way valve is connected to the inlet of the electromagnetic expansion valve; the outlet of the electromagnetic expansion valve is connected to the input main pipe; and the second outlet of the second three-way valve is connected to the output-input main pipe.

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