WO2009140905A1

WO2009140905A1 - A cooling system, a control method thereof and a machine room

Info

Publication number: WO2009140905A1
Application number: PCT/CN2009/071838
Authority: WO
Inventors: 李月宁; 洪宇平
Original assignee: 华为技术有限公司
Priority date: 2008-05-23
Filing date: 2009-05-18
Publication date: 2009-11-26
Also published as: US20110042057A1; CN101586854B; CN101586854A

Abstract

A cooling system includes a heat exchanger (301) buried under ground, a first air-liquid heat exchanger (302), a second air-liquid heat exchanger (303), a controller (304), a fluid conveying means (305), and connecting pipes (307). A control method used in the cooling system includes steps: obtaining at least one surrounding information including temperature out of the machine room, and soil temperature surrounding the buried pipes, controlling the opening of corresponding circulation paths according the preset control strategy and the obtained surrounding information, opening at least one of the circulation paths, cooling by means of flow of the circulation fluid in the opened circulation paths. A machine room using the cooling system is also disclosed.

Description

The invention relates to a heat dissipation system, a control method and a machine room. The application is submitted to the Chinese Patent Office on May 23, 2008, and the application number is 200810067334.5, and the invention title is "a heat dissipation system, a control method and a machine room". The entire contents of which are incorporated herein by reference.

TECHNICAL FIELD The present invention relates to the field of heat dissipation technologies, and in particular, to a heat dissipation system, a method, and a machine room based on a ground source heat pump technology. BACKGROUND OF THE INVENTION At present, ground source heat pump technology is used in the field of building energy conservation, and a ground source heat pump is a heat source that can utilize heat and cool in the shallow underground geothermal resources (also called ground energy, including ground water, soil or surface water, etc.). Energy saving system.

With the development of communication technology, the density of communication equipment deployed in outdoor integrated computer rooms is increasing. Communication equipment generally runs 24 hours a day, and generates a large amount of heat. Because the communication equipment itself generates heat, and sometimes the natural environment temperature is high, Conducive to the heat dissipation of the equipment, and the communication equipment in the equipment room has requirements for the ambient temperature, and the high temperature environment is likely to cause damage to the communication equipment. Therefore, the heat dissipation problem of the equipment room has become an urgent problem to be solved in the outdoor integrated computer room.

Please refer to Figure 1. Schematic diagram of using the air conditioner to dissipate heat from the communication equipment in the equipment room. In FIG. 1, at least one communication device 103 is disposed in the equipment room 100, and air conditioners 101 and 102 are disposed on the side wall of the equipment room 100, and the air conditioners 101 and 102 are generally window type or wall-mounted machines; 101, 102 make the air in the equipment room reach a suitable temperature;

Please refer to FIG. 2 , which is a schematic diagram of heat dissipation for the communication equipment in the equipment room by using the air conditioning and direct ventilation cooling system in the existing equipment room. In FIG. 2, at least one communication device 205 is disposed in the equipment room 200, and air conditioners 203 and 204 are disposed on the side wall of the equipment room 200. The air conditioners 203 and 204 are generally window type or wall-mounted machines; and in the equipment room 200 An air outlet control device 202 is disposed at the top of the left side wall, and an air inlet control device 201 is disposed at the bottom of the right side wall of the equipment room 200. Here, the air conditioners 203 and 204 constitute an air conditioning system, and the ventilation control devices 201 and 202 constitute a direct ventilation. The system, as shown in FIG. 2, the working principle of the direct ventilation system is that the outdoor cold air enters the machine room from the air intake control device 201, and the heat is taken away when passing through the interior of the machine room, and the hot air leaves the engine room from the air outlet control device 202; Generally, when the outdoor temperature of the equipment room is relatively low, use direct ventilation. System, on the other hand, use the air conditioning system when the outdoor temperature of the equipment room is high.

The inventors of the present invention found in the prior art that at least the following problems exist in the prior art: The air conditioning type heat dissipation system commonly used in the existing equipment room consumes a relatively large amount of energy, and has an impact on the outdoor environment; Although the wind cooling system is more energy efficient than the air conditioning type cooling system alone, the direct ventilation part is affected by the air quality, and the application scenario is limited.

SUMMARY OF THE INVENTION Embodiments of the present invention provide a heat dissipation system, a control method, and a machine room, which can effectively dissipate heat for a computer room, so that the air in the equipment room reaches a suitable temperature, and brings energy saving benefits.

The technical solution of the embodiment of the present invention is specifically implemented as follows:

A heat dissipation system, the heat dissipation system is applied to a machine room, the heat dissipation system includes a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a buried heat exchange unit, a control device, a fluid delivery device, and a connection pipeline The first gas-liquid heat exchanger is disposed in the machine room, the second gas-liquid heat exchanger is disposed outside the machine room, the buried heat exchange unit is buried in the ground, and a second gas-liquid heat exchanger, the buried heat exchange unit and the first gas-liquid heat exchanger are connected by a connecting pipeline to form at least two circulation pipelines;

The control device is configured to obtain environment information including at least one of an outdoor temperature of the equipment room and a soil temperature around the buried pipe, and control at least at least two of the at least two circulation lines according to the preset control strategy and the obtained environmental information. A circulation line is in an open state, and the circulating liquid flows in the open circulation line driven by the fluid delivery device to complete heat dissipation.

a machine room, comprising a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a buried heat exchange unit, a control device, a fluid conveying device, and a heat dissipation system connecting the pipelines are applied to the machine room, in the machine room The first gas-liquid heat exchanger is provided; the first gas-liquid heat exchanger, the second gas-liquid heat exchanger installed outside the machine room, and the buried heat exchange unit buried in the ground Connected to each other through the connecting pipe to form at least two circulating pipes;

The control device is configured to obtain environment information including at least one of an outdoor temperature of the equipment room and a soil temperature around the buried pipe, and control at least at least two of the at least two circulation lines according to the preset control strategy and the obtained environmental information. The strip circulation line is in an open state, and the circulating liquid is driven by the fluid delivery device to flow in the opened circulation line to complete heat dissipation.

A control method is applied to a heat dissipation system including a buried heat exchange unit, a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a control device, a fluid delivery device, and a connecting pipe, and the heat dissipation system is applied to a machine room The second gas-liquid heat exchanger, the buried heat exchange unit and the first gas-liquid heat exchanger are connected by a connecting pipeline to form at least two circulating pipelines, including:

Obtaining environmental information including at least one of an outdoor temperature of the equipment room and a soil temperature surrounding the buried pipe; At least one of the at least two circulation lines is controlled to be in an open state according to a preset control strategy and the obtained environmental information, and the circulating fluid flows in the opened circulation line to complete heat dissipation.

In the embodiment of the present invention, according to the preset control strategy and the obtained environmental information, the opening and/or closing of the corresponding circulation pipeline is controlled, and the heat in the equipment room is transmitted to the circulating liquid through the first gas-liquid heat exchanger, and the circulating liquid flows. The second gas-liquid heat exchanger, and/or the buried heat exchange unit dissipates heat, so that the air in the machine room reaches a suitable temperature;

Moreover, the main power consumption in the embodiment of the present invention is derived from the pipeline conveying device and the air conveying device in the two gas-liquid heat exchangers, which is more energy-saving than the conventional air conditioning system;

Moreover, in the embodiment of the present invention, since the buried heat exchange unit and the outdoor first gas-liquid heat exchanger are alternately and/or simultaneously used, the possibility of heat dissipation to the underground soil for a long period of time is avoided, and the time for recovering the soil temperature is avoided, thereby avoiding The problem that the underground soil receives heat for a long time and causes the soil temperature to rise, which affects the heat dissipation capacity of the system. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of an air conditioning heat dissipation system commonly used in an existing equipment room;

2 is a schematic structural view of a heat dissipation system of an air conditioner and a direct ventilation commonly used in an existing machine room;

3 is a schematic diagram of heat transfer in a heat dissipation system of a machine room according to an embodiment of the present invention;

4 is a schematic structural diagram of a heat dissipation system according to Embodiment 1 of the present invention;

FIG. 5 is a schematic structural diagram of a heat dissipation system according to Embodiment 2 of the present invention; FIG.

6 is a schematic structural diagram of a heat dissipation system applied to a machine room according to Embodiment 3 of the present invention;

7 is a schematic structural diagram of a heat dissipation system according to Embodiment 4 of the present invention;

8 is a schematic structural diagram of a heat dissipation system according to Embodiment 5 of the present invention;

9 is a schematic structural view of a heat dissipation system according to Embodiment 6 of the present invention;

10 is a schematic structural diagram of a heat dissipation system according to Embodiment 7 of the present invention;

11 is a schematic diagram of an internal module of a control device in a heat dissipation system according to an embodiment of the present invention;

12 is a flowchart of a control method according to an embodiment of the present invention;

13 is a specific flowchart of a control method according to Embodiment 1 of the present invention;

14 is a specific flowchart of a control method according to Embodiment 1 of the present invention;

15 is a specific flowchart of a control method according to Embodiment 3 of the present invention;

16 is a schematic diagram of a fan speed regulation strategy of a second gas-liquid heat exchanger in a heat dissipation system according to an embodiment of the present invention; FIG. 17 is a schematic diagram of a fan speed regulation strategy of a first gas-liquid heat exchanger in a heat dissipation system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 3 , which is a schematic diagram of heat transfer in a heat dissipation system of a computer room according to an embodiment of the present invention. As shown in FIG. 3 , the circulating fluid acts as a medium to transfer heat of air inside the equipment room to external ambient air and/or underground soil, for example: When the outdoor temperature is low, such as the ambient temperature in the winter is relatively low, the heat transfer process 10 is used to transfer the heat in the room to the outside environment; for example, when the outdoor temperature of the equipment room is high, such as the summer ambient temperature is relatively high, the heat transfer is adopted. In the process 20, the heat in the equipment room is transferred to the underground soil; the heat in the equipment room is dissipated, so that the proper temperature is reached in the equipment room, and the energy saving benefit is avoided, thereby avoiding the long-term receiving heat of the underground soil and causing the soil temperature to rise. High and affects the cooling capacity of the system.

The embodiment of the invention provides a heat dissipation system, which is applied to a machine room, and the heat dissipation system includes a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a buried heat exchange unit, a control device, and a fluid delivery device. And a connecting pipeline, wherein the first gas-liquid heat exchanger is disposed in the machine room, the second gas-liquid heat exchanger is disposed outside the machine room, and the buried heat exchange unit is buried in the ground. And the second gas-liquid heat exchanger, the buried heat exchange unit and the first gas-liquid heat exchanger are connected by a connecting pipeline to form at least two circulation pipelines; wherein the control The device is configured to obtain environmental information including at least one of an outdoor temperature of the equipment room and a soil temperature around the buried pipe, and control the at least two circulating pipes according to a preset control strategy and the obtained environmental information, so that the circulating pipe At least one of the roads is in an open state (ie, at least one of the at least two circulation lines is controlled to be open according to a preset control strategy and obtained environmental information) State), circulating the liquid in the fluid delivery device is driven in the open circulation flow line to complete the cooling.

It should be noted that: in order to realize the control device controlling the at least two circulation pipelines, at least one of the circulation pipelines is opened; in one implementation, at least one control valve is required on each circulation pipeline And, at least one fluid conveying device is required on each circulation line; it should be understood that: when a control valve is disposed at the same pipeline position of the plurality of circulation lines, the heat dissipation system of the embodiment of the invention A control valve can be provided on the connecting line; when a fluid conveying device is disposed at the same line position of the plurality of circulating lines, the heat dissipating system (on the connecting line in the embodiment) of the embodiment of the invention can be provided with a fluid FIG. 4 is a schematic structural diagram of a heat dissipation system according to Embodiment 1 of the present invention. The heat dissipation system is applied to an outdoor integrated machine room, and includes: a buried heat exchange unit 301, a first gas-liquid heat exchanger 302, and a first a two-liquid heat exchanger 303, a control device 304, a fluid delivery device 305, and a connection line 307, wherein the buried heat exchange unit 3 01 is installed underground, the first gas-liquid heat exchanger 302 is installed in the machine room, the second gas-liquid heat exchanger 303 is installed outside the machine room, and the buried heat exchange unit The element 301, the second gas-liquid heat exchanger 303, and the first gas-liquid heat exchanger 302 are connected by a connecting line 307 to form two circulation lines. It should be noted that: the first gas-liquid heat exchanger 302 and the second gas-liquid heat exchanger 303 are connected by a connecting line 307 to form a first circulation line; the first gas-liquid heat exchanger 302 and the buried ground The heat exchange units 301 are connected by a connecting line 307 to form a second circulating line; specifically: a tube in the buried heat exchange unit 301, a coil in the first gas-liquid heat exchanger 302, and a connection The lines 307 together form a circuit; the coils in the second gas-liquid heat exchanger 303, the coils in the first gas-liquid heat exchanger 302, and the connecting lines 307 together form another circuit.

The first gas-liquid heat exchanger 302 is configured to suck in hot air inside the machine room, and the hot air exchanges heat with the circulating liquid flowing inside the coil (that is, heat of air in the room is transmitted to the circulating liquid flowing in the coil), The air after releasing the heat is returned to the inside of the machine room, and the circulating liquid (ie, the hot fluid) that has absorbed the heat flows out of the first gas-liquid heat exchanger 302, specifically: under the driving force of the fluid conveying device 305, the heat is absorbed. The circulating liquid flows out of the first gas-liquid heat exchanger 302;

When the circulating liquid flows out of the first gas-liquid heat exchanger 302, the control device 304 is configured to obtain environmental information including at least one of the outdoor temperature of the machine room and the soil temperature around the buried pipe, according to a preset control strategy and the obtained environmental information. The first circulation line and the second circulation line are controlled to open the first circulation line and/or the second circulation line (ie, in an open state), it should be understood that: by default, the circulation line In the open state, it is necessary to control the corresponding circulation line to be closed; on the contrary, when the circulation line is in the closed state by default, it is necessary to control the corresponding circulation line to be opened, and the circulating circulating liquid flows through the opened circulation line. Corresponding second gas-liquid heat exchanger 303 and/or buried heat exchange unit 301.

When the circulating liquid flows into the second gas-liquid heat exchanger 303 along the first circulating line that is opened, the second gas-liquid heat exchanger 303 is used for the liquid flowing through the inner coil and the air flowing outside the coil. The heat exchange, the temperature-reduced circulating liquid (cold fluid) circulates into the first gas-liquid heat exchanger 302 along the opened first circulation line, specifically: driven by the fluid delivery device 305, after the temperature is lowered The circulating liquid (cold fluid) is circulated into the first gas-liquid heat exchanger 302 along the opened first circulation line.

When the circulating liquid flows into the buried heat exchange unit 301 along the opened second circulation line, the buried heat exchange unit 301 is used to transfer heat to the soil during the flow through the circulating liquid inside the pipe, and the cycle after the temperature is lowered The liquid (cold fluid) circulates into the first gas-liquid heat exchanger 302 along the opened second circulation line, specifically: the circulating liquid (cold fluid) after the temperature is lowered is driven by the fluid delivery device 305. The opened second circulation line is circulated into the first gas-liquid heat exchanger 302. The buried heat exchange unit 301, also referred to as a subterranean tube heat exchanger, consists of a series of tubes buried in the soil 406, a set of buried tube structures. The tube can be placed horizontally or vertically, preferably vertically. The material of the buried pipe is preferably polyethylene (PE). The depth and number of buried pipes are determined based on actual applications such as heat exchange and local climatic conditions.

As shown in Figure 4, in one implementation, the first circulation line is provided with a control valve 3.1 (specifically, the second gas liquid The control valve 3 is provided on the liquid inlet line of the heat exchanger 303, and the control valve is provided on the second circulation line. (Specifically, the liquid outlet line of the buried heat exchange unit 301 is provided with a control valve 3 The opening of the control valve 3.1 and/or the control valve 3.2 is controlled according to a preset control strategy and the obtained environmental information. Specifically, when the control valve 3.1 is opened, heat is dissipated based on the first circulation line; when the control valve 3.2 is opened, heat is dissipated based on the second circulation line; when the control valves are 3.1, 3. 2 When opened, the first circulation line and the second circulation line simultaneously dissipate heat in parallel.

It should be noted that, in the heat dissipation system of the first embodiment of the present invention, the fluid delivery device 305 is disposed at the liquid inlet conduit of the first gas-liquid heat exchanger 302. It should be understood that the fluid delivery device 305 can also be disposed at the At the liquid outlet line of a gas-liquid heat exchanger 302.

It can be seen that the heat dissipation system of the first embodiment of the present invention makes full use of the underground soil heat dissipation and the external air heat dissipation according to the local climate characteristics of the equipment room and the temperature variation characteristics of the soil. When the circulating fluid flows to the buried heat exchange unit 301, heat is transferred to the soil; when the circulating fluid flows to the second gas-liquid heat exchanger 303, heat is transferred to the outdoor air. By alternately dissipating heat or simultaneously dissipating heat in these two ways, it is more energy-efficient than the air conditioners commonly used in existing computer rooms, and avoids the problem of system instability caused by the increase of underground soil temperature caused by long-term underground heat dissipation, thereby enabling heat dissipation. (Temperature control) system operation is more reliable.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced into the equipment room, so there is no requirement for the air quality. Therefore, the application scenario is not limited. FIG. 5 is a schematic structural diagram of a heat dissipation system according to Embodiment 2 of the present invention. The heat dissipation system is applied to an outdoor integrated machine room, and includes: a buried heat exchange unit 401, a first gas-liquid heat exchanger 402, and a second gas-liquid The heat exchanger 403, the control device 404, the fluid delivery device 405, and the connecting line 407, wherein the buried heat exchange unit 401 is installed underground, the first gas-liquid heat exchanger 402 is installed in the machine room, and the second gas liquid The heat exchanger 403 is disposed outside the machine room, and the second gas-liquid heat exchanger 403 and the first gas-liquid heat exchanger 402 are connected by a connecting line 407 to form a first circulation line; The unit 401 and the first gas-liquid heat exchanger 402 are connected by a connecting line 407 to form a second circulation line.

As shown in FIG. 5, different from the first embodiment, the first circulation line is provided with control valves 4.1, 4. 2 (respectively disposed at the liquid inlet line of the second gas-liquid heat exchanger 403, liquid The outlet pipe is provided with a control valve 4.3, 4. 4 (located at the inlet pipe and the outlet pipe of the buried heat exchange unit 401, respectively);

The control device 404 is configured to control the corresponding control valve 4.1, 4. 2, and/or according to the preset control strategy and the obtained environmental information including at least one of the outdoor temperature of the room and the temperature of the soil surrounding the pipe. The opening of the control valve 4.3, 4. 4 causes the first circulation line and/or the second circulation line to be in an open state; specifically: when the control valve 4.1, 4. 2 is opened, the first gas liquid The coil of the heat exchanger 402, the coil of the second gas-liquid heat exchanger 403, and the corresponding portion of the connecting line 407 constitute The first circulation line is in an open state; similarly, when the control valves 3.4, 4.4 are opened, the coil of the first gas-liquid heat exchanger 402, the buried tube and the connection tube of the buried heat exchange unit 401 The second circulation line formed by the corresponding portion of the road 407 is in an open state.

There are several implementations of the control strategy here. In one implementation, the control strategy is:

The flow direction of the circulating liquid flowing out of the first gas-liquid heat exchanger 402 is controlled according to the comparison between the outdoor temperature of the equipment room and the preset value; the preset value here may be approximated, for example, to the local average temperature of the computer room, or It is a temperature value calculated by comprehensively considering environmental information such as the indoor temperature, the outdoor temperature, and the soil condition of the equipment room, or may be the designed maximum operating temperature of the first gas-liquid exchanger 402.

Specifically, when the outdoor temperature of the equipment room is higher than the set value, the control device 404 opens the control valve 4.3, the control valve 4.4 (when the control valve 4.1, 4. 2, 4. 3, 4. 4 default When the status is off), and / or, close the control valve 4. 2, control valve 4.1 (when the control valve 4. 1 , 4. 2, 4. 3, 4. 4 default state is open) The heat-absorbing circulating fluid 406 flowing out of the first gas-liquid heat exchanger 402 flows along the opened second circulation line to the buried heat exchange unit 401, and transfers the heat to the soil 408 in the buried heat exchange unit 401. Thereafter, the temperature of the self is lowered, and the circulating fluid 406 (cold fluid) flows back to the first gas-liquid heat exchanger 402 along the opened second circulation line, thereby completing one cycle, thereby dissipating heat in the machine room;

The control device 404 opens the control valve 4.1, and/or, closes the control valve 4.3, the control valve 4.4, from the first gas-liquid heat, when the outdoor temperature of the machine room is lower than the set value. The heat-absorbing circulating fluid 406 flowing out of the exchanger 402 flows along the first circulation line (specifically: the line opened by the control valve 4.1) to the second gas-liquid heat exchanger 403, in the second gas The circulating fluid in the liquid heat exchanger 403 transfers heat to the outside air, and the temperature of the self is lowered. The circulating fluid 406 (cold fluid) is along the first circulation line (specifically: the opening of the pipeline opened by the control valve 4.2) Flowing back to the first gas-liquid heat exchanger 402 to complete a cycle, which dissipates heat in the machine room;

It should be noted that the circulating flow of the circulating liquid 406 in the connecting line 407 is driven by the fluid conveying device 405, and the fluid conveying device 405 is disposed at the liquid inlet line of the first gas-liquid heat exchanger 402, which should be understood. Yes: The fluid delivery device 405 can also be disposed at the liquid outlet conduit of the first gas-liquid heat exchanger 402. The fluid delivery device 405 herein, in one implementation, can be a circulation pump that drives the flow of liquid.

It can be seen that the heat dissipation system of the second embodiment of the present invention fully utilizes the underground soil heat dissipation and the external air heat dissipation according to the local climate characteristics of the equipment room and the temperature change characteristics of the soil. When the circulating fluid flows to the buried heat exchange unit 401, heat is transferred to the soil; when the circulating fluid flows to the second gas-liquid heat exchanger 403, heat is transferred to the outdoor air. Alternating and simultaneously dissipating heat through these two methods is more energy-efficient than the air conditioners commonly used in existing computer rooms, and avoids the problem of system instability caused by the rise of underground soil temperature caused by long-term underground heat dissipation, thereby enabling heat dissipation ( Temperature control) system operation is more reliable.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced. Into the machine room, there is not much demand for air quality, so there are no restrictions on the application scenario. FIG. 6 is a schematic structural diagram of a heat dissipation system applied to a machine room according to Embodiment 3 of the present invention. The heat dissipation system is applied to a machine room 50. At least one communication device 506 is disposed in the machine room 50. The heat dissipation system includes: a buried exchange a heat unit 501, a first gas-liquid heat exchanger 502, a second gas-liquid heat exchanger 503, a control device 504, a fluid delivery device 505, and a connecting line 507; wherein the first gas-liquid heat exchanger 502 is disposed in the machine room 50, the control device 504, the fluid delivery device 505 is preferably disposed in the machine room 50, the second gas-liquid heat exchanger 503 is disposed outside the machine room 50, and the buried heat exchange unit 501 is buried in the ground;

The second gas-liquid heat exchanger 503 and the first gas-liquid heat exchanger 502 are connected by a connecting line 507 to form a first circulation line; the buried heat exchange unit 501 and the first gas-liquid heat exchanger 502 are connected by a connecting line 507 is connected to form a second circulation line; wherein, the first circulation line is provided with control valves 5071, 5073, the second circulation line is provided with control valves 5072, 5074; and the first gas-liquid heat exchanger 502 is mainly composed of a disk The pipe structure, the air inlet 5021, the air outlet 5022, and the air conveying device 5023 constitute a hot air inside the machine room 50 through the air inlet 5021 through the air conveying device 5023 inside, and the circulating liquid flowing inside the coil structure occurs. The heat exchange, the temperature of the hot air is reduced, and the temperature of the hot air is returned to the inside of the machine room 50 through the air outlet 5022. The circulating liquid flowing inside the coil structure absorbs the heat of the hot air, and then flows out under the driving of the fluid conveying device 505. First gas-liquid heat exchanger 502;

It should be noted that the first gas-liquid heat exchanger 502 is preferably of a vertical structure. When the space inside the machine room 50 is relatively small, the first gas-liquid heat exchanger 502 can be horizontally mounted and hung on the ceiling. The internal structure may be determined according to actual conditions. The air delivery device 5023 inside the first gas-liquid heat exchanger 502 may be an axial flow fan or a centrifugal fan, preferably a centrifugal fan;

The control device 504 is configured to control the first circulation pipeline and/or the second circulation pipeline according to the obtained environmental information including at least one of the outdoor temperature of the equipment room and the soil temperature around the buried pipe and a preset control strategy. The first circulation line and/or the second circulation line are opened, and the circulating circulating liquid flows to the corresponding second gas-liquid heat exchanger 503 or the buried heat exchange unit 501 through the opened circulation line.

In one implementation, control device 504 is specifically configured to control control valve 5071, control valve 5073, and/or, control valve

5072, the opening or closing of the control valve 5074, here, when the control valve 5071, the control valve 5073 is opened, the first circulation line is in the open state; similarly, when the control valve 5072, the control valve 5074 is opened, the second cycle The pipeline is in an open state; the circulating fluid flows through the first circulation line to the second gas-liquid heat exchanger 503 and flows back to the first gas-liquid heat exchanger 502; and/or, the circulating fluid flows through the second circulation pipeline to the buried The ground heat exchange unit 501 flows back to the first gas-liquid heat exchanger 502.

Under a specific control strategy, when the outdoor temperature of the equipment room is lower than the set value (the set value can be determined according to local climatic conditions and the local annual average temperature), the control device 504 controls the control valves 5071, 5073 to open, cycle Liquid (hot Fluid) entering the second gas-liquid heat exchanger 503 outside the machine room 50 along the first circulation line;

The second gas-liquid heat exchanger 503 is mainly composed of a coil structure 5031 and an air conveying device 5032; for circulating a liquid (hot fluid) into the coil structure 5031, and the air conveying device 5032 drives the ambient cold air to flow through the coil structure 5031 outer wall, so that the circulating liquid (hot fluid) flowing inside the cooling coil structure 5031 is lowered, and then flows into the indoor fan coil 502 as a cold fluid and then flows along the first circulation line; it should be noted that: The air delivery device 5032 in the gas-liquid heat exchanger 503 is preferably an axial flow fan.

Under a specific control strategy, when the outdoor temperature of the equipment room is higher than the set value, the control device 504 controls the control valves 5072, 5074 to open, and the circulating liquid (hot fluid) flowing out of the first gas-liquid heat exchanger 503 follows the first The second circulation pipeline enters the buried heat exchange unit 501;

The buried heat exchange unit 501 is mainly composed of a group of underground buried pipes, and the circulating liquid (thermal fluid) transfers its own heat to the soil during the flow of the underground buried pipe, and the temperature thereof is lowered, and the cold fluid is followed by the second The two-cycle line circulates into the first gas-liquid heat exchanger 502 inside the machine room 50.

It can be seen that the heat dissipation system of the third embodiment of the present invention fully utilizes the underground soil heat dissipation and the external air heat dissipation according to the local climate characteristics of the equipment room and the temperature variation characteristics of the soil. When the circulating fluid flows to the buried heat exchange unit 401, heat is transferred to the soil; when the circulating fluid flows to the second gas-liquid heat exchanger 403, heat is transferred to the outdoor air. Alternating heat dissipation through these two methods is more energy-efficient than the air conditioners commonly used in existing computer rooms, and avoids the problem of system instability caused by the increase of underground soil temperature caused by long-term underground heat dissipation, thereby enabling heat dissipation (temperature control). The system is running more reliably.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced into the equipment room, so there is no requirement for the air quality. Therefore, the application scenario is not limited. FIG. 7 is a schematic structural diagram of a heat dissipation system according to Embodiment 4 of the present invention. The heat dissipation system is applied to an outdoor integrated machine room, and includes: a buried heat exchange unit 601, a first gas-liquid heat exchanger 602, and a second gas-liquid The heat exchanger 603, the control device 604, the fluid transport device 605, and the connecting line 607, wherein the buried heat exchange unit 601 is installed underground, the first gas-liquid heat exchanger 602 is installed in the machine room, and the second gas liquid The heat exchanger 603 is disposed outside the machine room, and the second gas-liquid heat exchanger 603 and the first gas-liquid heat exchanger 602 are connected by a connecting line 407 to form a first circulation line; The unit 601 and the first gas-liquid heat exchanger 602 are connected by a connecting line 407 to form a second circulation line.

As shown in Figure 7, the second embodiment is provided with a three-way valve 6.1, 6. 2, three-way valve 6. 1, 6 2. The effect of the control valve 4.1, 4. 2, 4. 3, 4. 4 is the same as that of the second embodiment. The function of the three-way valve is to: close one line while closing one line; or open both lines at the same time.

The opening of the three-way valve 6.1 is controlled by the control device 604, according to the preset control strategy and the obtained environmental information including at least one of the outdoor temperature of the room and the temperature of the soil surrounding the pipe. And / and off to make the first loop The pipeline and/or the second circulation pipeline are in an open state, and the circulating liquid flows in the opened circulation pipeline to complete the heat dissipation; it should be noted that: the circulating flow of the circulating liquid in the connection pipeline is driven by the fluid delivery device 605 The fluid delivery device 605 is disposed at the liquid inlet conduit of the first gas-liquid heat exchanger 602. It should be understood that the fluid delivery device 605 can also be disposed at the liquid outlet conduit of the first gas-liquid heat exchanger 602. .

It can be seen that, in the heat dissipation system of the fourth embodiment of the present invention, the circulating fluid is flowed in the first circulation pipeline and/or the second circulation pipeline to complete the heat dissipation, that is, the heat is alternately or simultaneously radiated in two ways, compared with the existing equipment room. The commonly used air conditioners are more energy efficient, and avoid the problem of system instability caused by the increase of underground soil temperature caused by long-term underground heat dissipation, so that the heat dissipation (temperature control) system can be operated more reliably.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced into the equipment room, so there is no requirement for the air quality. Therefore, the application scenario is not limited. FIG. 8 is a schematic structural diagram of a heat dissipation system according to Embodiment 5 of the present invention. The heat dissipation system is applied to an outdoor integrated machine room, and includes: a buried heat exchange unit 701, a first gas-liquid heat exchanger 702, and a second gas-liquid The heat exchanger 703, the control device 704, the fluid transport device 705, and the connecting line 707, wherein the buried heat exchange unit 701 is installed underground, the first gas-liquid heat exchanger 702 is installed in the machine room, and the second gas liquid The heat exchanger 703 is disposed outside the machine room, and the second gas-liquid heat exchanger 703 and the first gas-liquid heat exchanger 702 are connected by a connecting line 707 to form a first circulation line; The unit 701 and the first gas-liquid heat exchanger 702 are connected by a connecting line 707 to form a second circulation line; the first gas-liquid heat exchanger 702, the second gas-liquid heat exchanger 703, and the buried heat exchange The units 701 are connected by a connecting line 707 to form a third circulation line.

The position of the three-way valve 7.2 and the three-way of the fourth embodiment are provided in the first and second circulation lines. The position of the valve 6.2 is different;

The control valve 7.1, the three-way valve 7. 2, according to the preset control strategy and the obtained environmental information including at least one of the outdoor temperature of the room and the temperature of the soil surrounding the pipe. Opening and/or closing of the middle valve, so that at least one of the first circulation line, the second circulation line and the third circulation line is in an open state (may be only the first circulation line is opened, or only the first The two-cycle pipeline is opened, or two of the three circulation pipelines may be opened or may be opened, and the circulating liquid flows in the opened circulation pipeline to complete the heat dissipation. Specifically, when the first circulation line is in the open state, the circulating liquid (hot fluid) flowing out of the first gas-liquid heat exchanger 702 flows into the second gas-liquid through the horizontal connection line of the three-way valve 7.1. The heat exchanger 703 performs heat exchange, and the circulating liquid (cold fluid) flowing out of the second gas-liquid heat exchanger 703 flows back to the first gas-liquid heat exchanger 702 through the horizontal connection line where the three-way valve 7.2 is located. Complete heat dissipation;

Circulating liquid (hot fluid) flowing out of the first gas-liquid heat exchanger 702 when the second circulation line is in an open state The vertical connecting line through the three-way valve 7.1, 7.2 flows into the buried heat exchange unit 701 for heat exchange, and the circulating liquid (cold fluid) flowing out of the buried heat exchange unit 701 flows back to the first gas-liquid Heat exchanger 702, completes heat dissipation;

When the third circulation line is in the open state, the circulating liquid (hot fluid) flowing out of the first gas-liquid heat exchanger 702 flows into the second gas-liquid heat exchanger through the horizontal connecting line where the three-way valve 7.1 is located. 703 is heat exchanged, and the circulating liquid (cold fluid) flowing out of the second gas-liquid heat exchanger 703 flows into the buried heat exchange unit 701 through the vertical connection line of the three-way valve 7.2 for heat exchange, from the buried The circulating liquid (cold fluid) flowing out of the heat exchange unit 701 flows back to the first gas-liquid heat exchanger 702 to complete heat dissipation.

It should be noted that: the circulating flow of the circulating liquid in the connecting pipe is driven by the fluid conveying device 705, and the fluid conveying device 705 is disposed at the liquid inlet pipe of the first gas-liquid heat exchanger 702, it should be understood that: The fluid delivery device 705 can also be disposed at the liquid outlet conduit of the first gas-liquid heat exchanger 702.

It can be seen that, in the heat dissipation system of Embodiment 5 of the present invention, the circulating fluid flows through at least one of the first circulation pipeline, the second circulation pipeline, and the third circulation pipeline to complete heat dissipation, which is commonly used in the existing equipment room. The air conditioner is more energy efficient, and avoids the problem of system instability caused by the rising temperature of the underground soil caused by long-term underground heat dissipation, so that the heat dissipation (temperature control) system can be operated more reliably.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced into the equipment room, so there is no requirement for the air quality. Therefore, the application scenario is not limited. FIG. 9 is a schematic structural diagram of a heat dissipation system according to Embodiment 6 of the present invention. The heat dissipation system is applied to an outdoor integrated machine room, and includes: a buried heat exchange unit 901, a first gas-liquid heat exchanger 902, and a second gas-liquid The heat exchanger 903, the control device 904, the fluid transport device 905, and the connecting line 907, wherein the buried heat exchange unit 901 is installed underground, the first gas-liquid heat exchanger 902 is installed in the machine room, and the second gas liquid The heat exchanger 903 is disposed outside the machine room, and the second gas-liquid heat exchanger 903 and the first gas-liquid heat exchanger 902 are connected by a connecting line 907 to form a first circulation line; The unit 901 and the first gas-liquid heat exchanger 902 are connected by a connecting line 907 to form a second circulation line.

As shown in FIG. 9, a three-way valve is provided at the intersection of the first circulation line and the second circulation line. The control device 904 is configured to receive the outdoor temperature of the equipment room according to a preset control strategy. The environmental information of at least one of the soil temperatures surrounding the buried pipe is used to control the opening and/or closing of the corresponding valve in the three-way valve 9.1, so that the first circulation line and/or the second circulation line are in an open state, circulating the liquid Flow in the open circulation line to complete the heat dissipation.

It should be noted that: the circulating flow of the circulating liquid in the connecting line is driven by the fluid conveying device 905, and the fluid conveying device 905 is disposed at the liquid inlet line of the first gas-liquid heat exchanger 902. It should be understood that: The fluid delivery device 905 can also be disposed at the liquid outlet conduit of the first gas-liquid heat exchanger 902.

It can be seen that in the heat dissipation system of Embodiment 6 of the present invention, the circulating liquid is in the first circulation line and/or the second circulation tube. The flow in the road, complete the heat dissipation, is more energy-efficient than the air conditioner commonly used in the existing computer room, and avoids the problem of system instability caused by the rising temperature of the underground soil caused by long-term underground heat dissipation, so that the heat dissipation (temperature control) can be achieved. The system runs more reliably.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced into the equipment room, so there is no requirement for the air quality. Therefore, the application scenario is not limited. 10 is a schematic structural diagram of a heat dissipation system according to Embodiment 7 of the present invention. The heat dissipation system is applied to an outdoor integrated machine room, and includes: a buried heat exchange unit 801, a first gas-liquid heat exchanger 802, and a second gas-liquid. The heat exchanger 803, the control device 804, the fluid transport devices 8051, 8052, and the connecting line 807, wherein the buried heat exchange unit 801 is installed underground, and the first gas-liquid heat exchanger 802 is installed in the machine room, the second The gas-liquid heat exchanger 803 is disposed outside the machine room, and the second gas-liquid heat exchanger 803 and the first gas-liquid heat exchanger 802 are connected by a connecting pipe 807 to form a first circulation line; The heat exchange unit 801 and the first gas-liquid heat exchanger 802 are connected by a connecting line 807 to form a second circulation line.

As shown in FIG. 10, a three-way valve 8.1 is provided at the intersection of the first circulation line and the second circulation line. The difference from the sixth embodiment is that the fluid delivery device is controlled, that is, the first cycle. A fluid delivery device 8051 is disposed on the pipeline, and a fluid delivery device 8052 is disposed on the second circulation pipeline (rather than providing a fluid delivery device at the same pipeline of the two circulation pipelines, such as a liquid outlet of the first gas-liquid heat exchanger) At the pipeline, at the liquid inlet line);

The control device 804 is configured to control the opening and/or closing of the corresponding valve of the three-way valve 8.1 according to the preset control strategy and the obtained environmental information including at least one of the outdoor temperature of the equipment room and the soil temperature of the buried pipe, and The fluid delivery device 8051 and/or the fluid delivery device 8052 are controlled such that the first circulation line and/or the second circulation line are in an open state, and the circulating liquid flows in the opened circulation line to complete heat dissipation. For example: when the control device 804 controls the valves of the three-way valve 8.1 to be opened, and the control fluid delivery device 8051 and the fluid delivery device 8052 are both activated, the first circulation line and the second circulation line simultaneously dissipate heat in parallel, that is, circulation The liquid flows in the first circulation line and the second circulation line that are opened to complete the heat dissipation.

When the control device 804 controls the horizontal valve of the three-way valve 8.1 to open, and the control fluid delivery device 8051 is activated, the circulating liquid is driven by the fluid delivery device 8051 to flow in the first circulating circuit that is opened to complete the heat dissipation. ;

When the control device 804 controls the vertical valve of the three-way valve 8.1 to open, and the control fluid delivery device 8052 is activated, the circulating liquid is driven by the fluid delivery device 8052 to flow in the second circulating circuit that is opened to complete the heat dissipation. .

It can be seen that, in the heat dissipation system of Embodiment 7 of the present invention, the circulating fluid flows in the first circulation pipeline and/or the second circulation pipeline to perform heat dissipation, which is more energy-saving than the air conditioner commonly used in the existing equipment room, and avoids long-term Heated down to the ground The problem of system instability caused by the increase of the temperature of the underground soil can make the heat dissipation (temperature control) system operate more. In the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced. Entering the equipment room, there is not much demand for air quality. Therefore, there are no restrictions on the application scenario. In order to further achieve the effect of energy saving and noise reduction, for the first gas-liquid heat exchanger and the second gas-liquid heat exchanger of the first to seventh embodiments, the control device can be further realized, for the first gas-liquid heat exchanger, The fan of the second gas-liquid heat exchanger performs speed regulation; for example: The first gas-liquid heat exchanger is divided into two types, one is a first gas-liquid heat exchanger whose fan is not regulated, and the other is a fan speed control. The first gas-liquid heat exchanger; similarly, the second gas-liquid heat exchanger can also be divided into two types, one is a second gas-liquid heat exchanger whose fan is not regulated, and the other is a second speed control of the fan. Gas liquid heat exchanger.

Correspondingly, referring to FIG. 5, for example, the first circulation pipeline has three combinations: 1. a second gas-liquid heat exchanger with a speed regulation, and a first gas-liquid heat exchanger with no speed regulation are connected by a connecting pipe. a first circulation pipeline formed by the road; 2. a first circulation pipeline formed by a connecting pipeline between the second gas-liquid heat exchanger without speed regulation and the first gas-liquid heat exchanger with speed regulation; A first circulation line formed by a connecting line between the speed-controlled second gas-liquid heat exchanger and the unregulated first gas-liquid heat exchanger.

The second circulation pipeline has two combinations: 1. a second circulation pipeline formed by a connecting pipeline between the buried heat exchange unit and the first gas-liquid heat exchanger of the speed regulation; 2. the buried heat exchange unit a second circulation line formed by the connecting line between the unregulated first gas-liquid heat exchangers. Since there are many speed control strategies for fans, the following describes them in one way:

Fan speed regulation strategy of the second gas-liquid heat exchanger:

Keeping the temperature of the circulating liquid outlet of the second gas-liquid heat exchanger unchanged, different outdoor temperatures (for example: air inlet temperature) correspond to the speed of a fan, as shown in Figure 16, when the fan is running at full speed, it corresponds to the maximum allowable outdoor. Temperature Tfmax, when the heat dissipation load is constant, Tfmax = Tf (Tf is the maximum allowable temperature of the design of the second gas-liquid heat exchanger). The minimum speed of the fan corresponds to a temperature Tfmin. When the outdoor temperature is equal to Tf, the fan runs at full speed. When the outdoor temperature is less than or equal to the minimum temperature Tfmin, the fan runs at the lowest speed. When the temperature is lower than the limit temperature Tfl imit, the fan can even stop. ;

Fan speed regulation strategy of the first gas-liquid heat exchanger:

Preferably, depending on the indoor temperature, it is also possible to adjust the speed according to other parameters. The indoor temperature here may be one of the indoor fan coil outlet temperature, the inlet air temperature of the indoor communication equipment, and the indoor average temperature. The "inlet air temperature of the indoor communication equipment" is taken as an example: As shown in Fig. 17, when the fan runs at full speed, it corresponds to the maximum allowable temperature Tsmax in the room; when the minimum speed of the fan corresponds to a temperature Tsmin,

When the inlet air temperature of the communication device is equal to Tsmax, the fan runs at full speed;

When the inlet air temperature of the communication device is less than or equal to Tsmin, the fan runs at the lowest speed;

When the inlet air temperature of the communication device is between Tsma _X and Tsmin, the fan is adjusted according to the set speed regulation curve;

When the inlet air temperature of the communication device is less than a certain limit temperature Tsl imit , the fan can be stopped. The various implementations of the control device are described below:

In one implementation, each of the circulation lines is provided with at least one control valve, and each of the circulation lines is provided with at least one fluid delivery device, and the fluid delivery device disposed on each circulation line is the same One time

The control device is a first valve control device, configured to control opening or closing of the corresponding control valve according to a preset control strategy and the obtained environmental information, so that at least one circulation line is opened, and circulating fluid is transported in the fluid The device is driven to flow in the opened circulation line to complete the heat dissipation.

In another implementation, each of the circulation lines is provided with at least one control valve, and each of the circulation lines is provided with at least one fluid delivery device, and the fluid delivery device disposed on each circulation line is Not at the same time;

The control device is a second valve control device for controlling opening or closing of the corresponding control valve according to a preset control strategy and the obtained environmental information, enabling at least one circulation line to be opened, and controlling the corresponding fluid delivery device to be driven. The flow of the circulating liquid in the corresponding circulation line, the circulating fluid flows in the opened circulation line to complete the heat dissipation.

In another implementation, the second gas-liquid heat exchanger and the first gas-liquid heat exchanger are connected by the connecting pipeline to form a first circulation pipeline; the buried heat exchange a unit and the first gas-liquid heat exchanger are connected by the connecting pipeline to form a second circulation pipeline;

The first circulation line is provided with a first control valve and a second control valve, the second circulation line is provided with a third control valve and a fourth control valve, and the control device is a third valve control device, Controlling the first control valve and the second control valve to open according to a preset control strategy and the obtained environmental information, and/or, the third control valve and the fourth control valve are opened, and the circulating liquid is at the position of the open control valve Flow in a circulation line and/or a second circulation line to complete heat dissipation.

Specifically, in an implementation, the control device is further configured to: perform speed control on the fan of the second gas-liquid heat exchanger according to the obtained outdoor temperature and the information about the preset outdoor temperature information and the fan speed; with/ Or, according to the obtained indoor temperature, and the information of the preset indoor temperature information and the fan rotation speed, the speed control of the fan of the second gas-liquid heat exchanger is performed. FIG. 11 is a schematic diagram of an internal structure of a control device in a heat dissipation system according to an embodiment of the present invention. As shown in FIG. 11, the control device includes a control unit 1000 and an environment information obtaining unit 2000;

The environment information obtaining unit 2000 is configured to obtain environmental information including at least one of an outdoor temperature of the equipment room and a soil temperature surrounding the buried pipe;

The control unit 1000 is configured to control, according to the preset control strategy and the environmental information obtained by the unit 2000, at least one of the outdoor temperature of the equipment room and the soil temperature around the buried pipe, and control the corresponding circulation pipeline to make at least one The circulation line is opened (ie, at least one of the at least two circulation lines is controlled to be in an open state), wherein the circulating fluid is driven by the fluid delivery device to flow in the opened circulation line to complete heat dissipation.

In order to realize that the control unit 1000 controls the corresponding circulation line to open at least one circulation line, in one implementation, at least one control valve is disposed on each circulation line, and at least one fluid delivery device is disposed on each circulation line. ;

When the fluid conveying devices disposed on each of the circulation lines are the same, the control unit 1000 is a first valve control unit for obtaining environmental information obtained by the unit 2000 according to a preset control strategy and environmental information, and controlling the corresponding control valves. Opening or closing, at least one circulation line is opened, and circulating fluid flows in the opened circulation line under the driving of the fluid conveying device to complete heat dissipation.

When the fluid delivery devices disposed on each of the circulation lines are not the same, the control unit 1000 is a second valve control unit for obtaining the environmental information obtained by the unit 2000 according to the preset control strategy and the environmental information, and controlling the corresponding control valves. Opening or closing, opening at least one circulation line, and controlling a corresponding fluid delivery device to drive the flow of the circulating liquid in the corresponding circulation line, and the circulating fluid flows in the opened circulation line to complete the heat dissipation.

The environment information obtaining unit 2000 is further configured to obtain a room temperature of the equipment room;

Correspondingly, the control unit 1000 is further configured to adjust the fan of the second gas-liquid heat exchanger according to the obtained outdoor temperature and the information about the preset outdoor temperature information and the fan speed of the second gas-liquid heat exchanger. Speed control; and/or, according to the obtained indoor temperature, and the information of the preset indoor temperature information and the fan speed of the first gas-liquid heat exchanger, the speed control of the fan of the first gas-liquid heat exchanger is performed. The control method of the embodiment of the present invention will be described in detail below. Please refer to FIG. 12, which is a control of an embodiment of the present invention. Flow chart of a method for applying a heat dissipation system including a buried heat exchange unit, a first gas liquid heat exchanger, a second gas liquid heat exchanger, a control device, a fluid delivery device, and a connecting pipe, the heat dissipation system The utility model is applied to a machine room, wherein the second gas-liquid heat exchanger, the buried heat exchange unit and the first gas-liquid heat exchanger are connected by a connecting pipeline to form at least two circulating pipelines. Includes the following steps:

Step 1010: Obtain environmental information including at least one of an outdoor temperature of the equipment room and a soil temperature around the buried pipe. Step 1020: Control, according to a preset control strategy and the obtained environmental information, open the corresponding circulation pipeline, so that at least one circulation pipeline is at The open state (ie, controlling at least one of the at least two circulation lines in the open state), the circulating fluid flows in the opened circulation line to complete heat dissipation.

When the second gas-liquid heat exchanger and the first gas-liquid heat exchanger form a first circulation line through the connecting pipeline; the buried heat exchange unit and the first gas-liquid heat exchanger form a second circulation pipeline through the connecting pipeline Time;

Step 1020 is to control the first circulation line and/or the second circulation line to be opened according to the preset control strategy and the obtained environmental information, wherein the circulating fluid flowing from the first gas-liquid heat exchanger passes through the first circulation After the pipeline flows into the corresponding second gas-liquid heat exchanger for heat dissipation, and flows back to the first gas-liquid heat exchanger through the first circulation pipeline; and/or, flows out from the first gas-liquid heat exchanger The circulating fluid flows into the corresponding buried heat exchange unit through the second circulation line for heat dissipation, and flows back to the first gas-liquid heat exchanger through the second circulation line.

Referring to FIG. 5, wherein the circulating fluid flowing out of the first gas-liquid heat exchanger flows into the corresponding second gas-liquid heat exchanger through the first circulation line to dissipate heat, and circulates through the first circulation line. Flowing back to the first gas-liquid heat exchanger; and/or circulating fluid flowing from the first gas-liquid heat exchanger flows into the corresponding buried heat exchange unit through the second circulation line for heat dissipation, and passes through the The second circulation line flows back to the first gas-liquid heat exchanger.

In order to control the corresponding circulation line, at least one circulation line is opened, and in one implementation, at least one control valve is arranged on each circulation line, and at least one fluid delivery device is arranged on each circulation line; When the pipeline is provided with a control valve, and each circulation pipeline shares a fluid delivery device, step 1020 specifically controls the opening or closing of the corresponding control valve according to the preset control strategy and the obtained environmental information, so that at least one circulation pipeline is provided. When the circulating fluid is driven by the fluid conveying device, the circulating fluid flows in the opened circulation line to complete the heat dissipation.

When a control valve is disposed on the circulation pipeline, and different fluid delivery devices are disposed on each circulation pipeline, step 1020 specifically controls opening or closing of the corresponding control valve according to a preset control strategy and obtained environmental information, so that at least one The circulation line is opened, and the corresponding fluid delivery device is controlled to drive the flow of the circulating liquid in the corresponding circulation line, and the circulating fluid flows in the opened circulation line to complete the heat dissipation. In an implementation, the control strategy involved in the control method of the embodiment of the present invention may be: For convenience of description, in conjunction with FIG. 5, when the outdoor temperature T1 is equal to or lower than the designed maximum operating temperature Tf of the second gas-liquid heat exchanger (specifically: the current working temperature of the second gas-liquid heat exchanger is less than or Equal to Tf), opening the first circulation pipeline, the circulating liquid from the first gas-liquid heat exchanger enters the second gas-liquid heat exchanger, and the system uses the first circulation pipeline for heat dissipation; in one implementation, the second The design maximum working temperature Tf of the gas-liquid heat exchanger is calculated based on the heat dissipation load inside the machine room and the parameters of the gas-liquid heat exchanger itself.

When the outdoor temperature is higher than the designed maximum working temperature Tf of the second gas-liquid heat exchanger, the first circulation line is closed, the second circulation line is opened, and the circulating liquid from the first gas-liquid heat exchanger enters the buried exchange Thermal unit.

When the two circulating pipelines are unable to meet the heat dissipation requirements respectively, that is, when the indoor temperature T2 is higher than the maximum allowable temperature in the equipment room (for example, the maximum allowable inlet temperature of the communication equipment in the equipment room), the outdoor temperature T 1 is greater than the second. When the gas-liquid heat exchanger is designed for the maximum working temperature Tf, the first circulation line and the second circulation line are all turned on for heat dissipation. It should be understood that this control strategy applies to Figures 4-7, Figure 9, and Figure 10. Referring to FIG. 13 , it is a specific flowchart of a control method according to Embodiment 1 of the present invention. The method is applied to: a buried heat exchange unit, a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a control device, The fluid delivery device and the heat dissipation system connecting the pipelines are described in conjunction with FIG. 5 for convenience of description. When the heat dissipation system starts to work, the method includes the following steps:

Step 1011: Obtain the outdoor temperature Tl of the equipment room and the indoor temperature of the equipment room Τ2;

Specifically, the temperature sensor is used to obtain the outdoor temperature T1 and the room temperature Τ2.

Step 1012: According to the control strategy, compare the outdoor temperature T1 with the designed maximum allowable temperature Tf of the second gas-liquid heat exchanger. When T1>Tf, perform step 1014; otherwise, perform step 1013;

Step 1013: Compare the indoor temperature T2 of the equipment room with the maximum allowable temperature Ts of the equipment room (for example, the maximum allowable inlet temperature of the communication equipment in the equipment room) according to the control strategy. When T2>Ts, go to step 1016. Otherwise, go to step 1015. ;

Step 1014: Control the second circulation pipeline to be opened, and the second circulation pipeline works;

Specifically, the second circulation line is controlled to be opened, and the circulating fluid is driven by the fluid delivery device to flow in the opened second circulation line to complete heat dissipation.

Step 1015: Control the first circulation pipeline to be opened, and the first circulation pipeline works;

Specifically, the first circulation line is controlled to be opened, and the circulating fluid is driven by the fluid delivery device to flow in the opened first circulation line to complete heat dissipation.

Step 1016: Control the first circulation pipeline and the second circulation pipeline to be opened, and the first circulation pipeline and the second circulation pipeline work simultaneously; Specifically, the first circulation line and the second circulation line are controlled to be simultaneously opened, and the circulating fluid flows in the opened first circulation line and the second circulation line by the fluid conveying device to complete heat dissipation.

It can be seen that, in the control method of the embodiment of the present invention, the circulating fluid flows in the first circulation pipeline and/or the second circulation pipeline to perform heat dissipation, which is more energy-saving than the air conditioner commonly used in the existing equipment room, and avoids long-term direction. The problem of system instability caused by the increase of underground soil temperature caused by underground heat dissipation can make the operation of heat dissipation (temperature control) system even more guilty.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced into the equipment room, so there is no requirement for the air quality. Therefore, the application scenario is not limited. In another implementation, the control strategy involved in the control method of the embodiment of the present invention may further be as follows: the outdoor temperature T1, the temperature of the underground buried soil Τ3, the design maximum temperature Tf of the second gas-liquid heat exchanger, The highest temperature Tm of the underground buried soil;

For convenience of description, combined with FIG. 5, when the heat dissipation system starts to work, the second circulation pipeline is opened, so that the liquid from the first gas-liquid heat exchanger enters the buried heat exchange unit, and the heat is transferred to the underground soil, and the local underground When the soil temperature T3 around the buried pipe is slowly increased equal to Tm, compare T1 and Tf. When T1 is less than or equal to Tf, open the first circulation line and close the second circulation line; when T1 is greater than Tf, simultaneously open the first A circulation line and a second circulation line allow the two to share a certain thermal load. This control strategy applies to Figures 4-7, Figure 9, and Figure 10.

That is, the soil temperature T3 around the local buried pipe is smaller than the designed maximum temperature Tm of the underground buried pipe, and the second circulating pipe is controlled to be opened, and the circulating fluid flows in the opened second circulating pipe driven by the fluid conveying device. Complete heat dissipation;

When the soil temperature T3 around the local buried pipe is higher than or equal to the designed maximum temperature Tm of the underground buried pipe soil, and T1 is less than or equal to the designed maximum temperature Tf of the second gas-liquid heat exchanger, the first circulation pipe is opened, and the cycle is controlled. The fluid flows in the opened first circulation line under the driving of the fluid conveying device to complete the heat dissipation;

When the soil temperature T3 around the local buried pipe is higher than or equal to the designed maximum temperature Tm of the underground buried pipe soil, and T1 is greater than the designed maximum temperature Tf of the second gas-liquid heat exchanger, the first circulation pipeline and the second circulation are controlled. The pipeline is opened, and the circulating fluid is driven by the fluid conveying device to flow in the opened first circulation line and the second circulation line to complete heat dissipation. 14 is a specific flowchart of a control method according to Embodiment 2 of the present invention. The method is applied to: a buried heat exchange unit, a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a control device, and a fluid. The conveying device and the heat dissipation system connecting the pipelines are described in conjunction with FIG. 5 for convenience of description. When the heat dissipation system starts to work, the method includes The following steps:

The following relates to the outdoor temperature Tl, the temperature of the underground soil Τ3, the design maximum temperature Tf of the second gas-liquid heat exchanger, and the design maximum temperature Tm of the underground buried soil;

Step 2011, obtain the outdoor temperature Tl of the equipment room, the soil temperature around the buried pipe Τ3;

Specifically, the temperature sensor is used to obtain the outdoor temperature Tl and the soil temperature around the underground pipe Τ3.

Step 2012, according to the control strategy, compare the soil temperature Τ3 around the buried pipe with the design maximum temperature Tm of the underground buried pipe soil. When T3 <Tm, perform step 2014; otherwise, perform step 2013;

Step 2013: According to the control strategy, compare the outdoor temperature T1 with the designed maximum temperature Tf of the second gas-liquid heat exchanger, and when T l>Tf, perform step 2016, and vice versa, perform step 2015;

Step 2014, controlling the second circulation pipeline to be opened, and the second circulation pipeline working;

Step 2015, controlling the first circulation pipeline to be opened, and the first circulation pipeline works;

Step 2016, controlling the first circulation pipeline and the second circulation pipeline to be opened, and the first circulation pipeline and the second circulation pipeline work simultaneously;

Specifically, the first circulation line and the second circulation line are controlled to be simultaneously opened, and the circulating fluid flows in the opened first circulation line and the second circulation line under the driving of the fluid conveying device to complete heat dissipation.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced into the equipment room, so there is no requirement for the air quality. Therefore, the application scenario is not limited. 15 is a specific flowchart of a control method according to Embodiment 3 of the present invention. The method is applied to a method including a buried heat exchange unit, a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a control device, and a fluid. The control valve 4. 2, the control valve 4. 2, 2, the control valve 4. 2, the control valve 4. 2, the control valve 4. 2, the control valve 4. 2, the control valve 4. 2, the control valve 4. 2, the control valve 4. 2, the control valve 4. 2 Control valve 4.1, including the following steps:

Step 3011: Collect outdoor temperature information T1 from at least one measurement and control point set outside the equipment room; It should be noted that: when the outdoor temperature information is collected from a plurality of measurement and control points, an outdoor average temperature value can be calculated;

Step 3012: Compare the collected outdoor temperature T 1 with the preset value Ts according to the control strategy. When T DTs, perform step 3013; otherwise, perform step 3014;

That is, controlling the opening or closing of the corresponding control valve according to the result of the comparison;

The set value here can be approximated to the annual average temperature of the computer room, or the temperature value calculated by considering the environmental information such as the indoor temperature, outdoor temperature and soil condition of the equipment room.

Step 3013, control to open the control valve 4. 3. Control valve 4. 4;

Step 3014, control to open the control valve 4. 2. Control valve 4. 1.

5。 Controlling the valve 4. 4. Controlling the valve 4. 4. Controlling the valve 4. 4. Controlling the valve 4. When the outdoor temperature T1 is higher than the set value Ts, the control valve is opened. The heat-absorbing circulating fluid 406 flowing out of the gas-liquid heat exchanger 402 flows along the opened second circulation line to the buried heat exchange unit 401, and transfers heat to the soil 408 in the buried heat exchange unit 401. The temperature is lowered, and the circulating fluid 406 (cold fluid) flows back to the first gas-liquid heat exchanger 402 along the opened second circulation line, thereby completing one cycle, thereby dissipating heat in the machine room;

When the outdoor temperature T1 of the equipment room is lower than the set value Ts, the control opens the control valve. 4. 1. Control valve 4. 2, close the control valve

4. The control valve 4.4, the heat-absorbing circulating fluid 406 flowing out of the first gas-liquid heat exchanger 402 flows along the opened first circulation line to the second gas-liquid heat exchanger 403, in the second The circulating fluid in the gas-liquid heat exchanger 403 transfers heat to the outside air, and the temperature thereof is lowered, and the circulating fluid 406 (cold fluid) flows back to the first gas-liquid heat exchanger 402 along the opened first circulation line to complete a cycle. , the realization of the heat in the machine room is scattered.

In summary, it can be seen from the embodiment of the present invention that the underground soil heat dissipation and the external air heat dissipation are fully utilized according to the local climate characteristics of the equipment room and the temperature variation characteristics of the soil. When the circulating fluid flows to the buried heat exchange unit, heat is transferred to the soil; when the circulating fluid flows to the second gas-liquid heat exchanger, heat is transferred to the outdoor air. By alternately or simultaneously dissipating heat in these two ways, the proper temperature can be achieved in the equipment room, so that the communication equipment in the equipment room can guarantee normal operation for a long time, which is more energy-saving than the air conditioner commonly used in the existing equipment room, and reduces the impact on the natural environment, and It also avoids the problem of system instability caused by the increase of underground soil temperature caused by long-term underground heat dissipation, so that the heat dissipation system can be operated more reliably.

Moreover, in the embodiment of the present invention, when the heat is radiated by using the outside atmosphere, the outside air is not directly introduced into the equipment room, so there is no requirement for the air quality. Therefore, the application scenario is not limited.

A person skilled in the art can understand that the process of implementing the control method of the above embodiment can be completed by hardware related to the program instruction, and the program can be stored in a readable storage medium, and the program executes the corresponding in the above method when executed. step. The storage medium may be, for example, a ROM/RAM, a magnetic disk, an optical disk, or the like. The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A heat dissipation system, wherein the heat dissipation system is applied to a machine room, the heat dissipation system comprising a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a buried heat exchange unit, a control device, and a fluid a conveying device and a connecting pipeline, wherein the first gas-liquid heat exchanger is disposed in the machine room, the second gas-liquid heat exchanger is disposed outside the machine room, and the buried heat exchange unit is embedded in Underground, and the second gas-liquid heat exchanger, the buried heat exchange unit and the first gas-liquid heat exchanger are connected by a connecting pipe to form at least two circulating pipes; The control device is configured to obtain environmental information including at least one of an outdoor temperature of the equipment room and a soil temperature around the buried pipe, and control at least one of the at least two circulation lines according to a preset control strategy and the obtained environmental information. The pipeline is in an open state, and the circulating liquid flows under the driving of the fluid conveying device in the opened circulation pipeline to complete the heat dissipation.

2. The system according to claim 1, wherein the first gas-liquid heat exchanger comprises: a coil structure, an air inlet, an air outlet, and an air conveying device, through which the air conveying device is to be The hot air inside the machine room is sucked in through the air inlet, and exchanges heat with the circulating liquid flowing inside the coil structure. The hot air releases heat and then returns to the inside of the machine room as cold air through the air outlet. The circulating liquid flowing inside the coil structure absorbs heat. After the heat of the air, the first gas-liquid heat exchanger flows out under the driving of the fluid delivery device.

The system according to claim 1 or 2, wherein the second gas-liquid heat exchanger and the first gas-liquid heat exchanger are connected by a connecting pipe to form a first circulation pipe. The buried heat exchange unit and the first gas-liquid heat exchanger are connected by a connecting pipeline to form a second circulation pipeline;

The control device is a first control device, configured to obtain environmental information including at least one of an outdoor temperature of the equipment room and a soil temperature around the buried pipe, and control the first circulation pipeline according to the preset control strategy and the obtained environmental information. Or the second circulation line is in an open state, and the circulating liquid flows under the driving of the fluid conveying device in the opened first circulation line and/or the second circulation line to complete heat dissipation.

4. The system according to claim 3, wherein the second gas-liquid heat exchanger is configured to pass a liquid flowing through the inner coil of the coil after the circulating liquid flows in the first circulation line that is opened. The heat is exchanged with the air flowing outside the coil, and the circulating liquid after the temperature is lowered is circulated back to the first gas-liquid heat exchanger along the opened first circulation line by the fluid conveying device.

5. The system according to claim 3, wherein the buried heat exchange unit is composed of one or more sets of buried pipelines, and is used for a second circulation pipe when the circulating liquid is opened. After the road flows in, the circulating liquid transfers heat to the soil during the flow of the underground buried pipe, and the circulating liquid whose temperature is lowered is driven by the fluid conveying device to flow back to the first gas-liquid heat along the opened second circulation pipe. Switch.

6. The system according to claim 1, wherein each of the circulation lines is provided with at least one a control valve, and each of the circulation lines is provided with at least one fluid delivery device, when the fluid delivery devices provided on each circulation line are the same

7. The system according to claim 1, wherein each of the circulation lines is provided with at least one control valve, and each of the circulation lines is provided with at least one fluid delivery device, each cycle When the fluid conveying devices provided on the pipeline are different,

8. A machine room, characterized in that a heat dissipation system including a first gas-liquid heat exchanger, a second gas-liquid heat exchanger, a buried heat exchange unit, a control device, a fluid delivery device, and a connecting pipe is applied to a machine room, wherein the first gas-liquid heat exchanger is disposed in the machine room; the first gas-liquid heat exchanger, the second gas-liquid heat exchanger installed outside the machine room, and the buried underground The buried heat exchange units are connected to each other through the connecting pipeline to form at least two circulating pipelines;

The control device is configured to obtain environment information including at least one of an outdoor temperature of the equipment room and a soil temperature around the buried pipe, and control at least at least two of the at least two circulation lines according to the preset control strategy and the obtained environmental information. A circulation line is in an open state, and the circulating liquid is driven by the fluid delivery device to flow in the opened circulation line to complete heat dissipation.

9. The machine room according to claim 8, wherein each of the circulation lines is provided with at least one control valve, and each of the circulation lines is provided with at least one fluid delivery device, each cycle When the fluid conveying devices provided on the pipeline are the same,

10. The machine room according to claim 8, wherein each of the circulation lines is provided with at least one control valve, and each of the circulation lines is provided with at least one fluid delivery device, each cycle When the fluid conveying devices provided on the pipeline are different,

The control device is a second valve control device, configured to use the preset control strategy and the obtained environmental information, Controlling the opening or closing of the corresponding control valve, opening at least one circulation line, and controlling the flow of the circulating fluid in the corresponding circulation line by the corresponding fluid delivery device, and the circulating fluid flows in the opened circulation line, completing Cooling.

The equipment room according to claim 8, wherein the second gas-liquid heat exchanger and the first gas-liquid heat exchanger are connected by the connecting pipe to form a first circulation pipe. The buried heat exchange unit and the first gas-liquid heat exchanger are connected by the connecting pipeline to form a second circulation pipeline;

12. The machine room according to claim 8, wherein the control device comprises:

An environmental information obtaining unit, configured to obtain environmental information including at least one of an outdoor temperature of the equipment room and a soil temperature around the buried pipe;

a control unit, configured to control at least one of the at least two circulation lines to be opened according to a preset control strategy and environment information obtained by the environment information obtaining unit, and the circulating fluid is driven by the fluid conveying device, Flow in the opened circulation line to complete the heat dissipation.

The equipment room according to claim 12, wherein the environment information obtaining unit is further configured to obtain a room temperature of the equipment room;

The control unit is further configured to: according to the obtained outdoor temperature of the equipment room, and the information about the outdoor temperature information set in advance and the fan speed of the second gas-liquid heat exchanger, perform corresponding to the fan of the second gas-liquid heat exchanger Speed control; and/or, according to the obtained room temperature, and the preset indoor temperature information and the fan speed of the first gas-liquid heat exchanger, the fan of the first gas-liquid heat exchanger is correspondingly Speed control.

14. A control method for use in a heat dissipation system including a buried heat exchange unit, a first gas liquid heat exchanger, a second gas liquid heat exchanger, a control device, a fluid delivery device, and a connecting pipe, the heat dissipation system application In the equipment room, wherein the second gas-liquid heat exchanger, the buried heat exchange unit and the first gas-liquid heat exchanger are connected by a connecting pipeline to form at least two circulating pipelines, It is characterized by:

Obtaining environmental information including at least one of an outdoor temperature of the equipment room and a soil temperature surrounding the buried pipe;

At least one of the at least two circulation lines is controlled to be in an open state according to a preset control strategy and the obtained environmental information, and the circulating fluid flows in the opened circulation line to complete heat dissipation.

The method according to claim 14, wherein the second gas-liquid heat exchanger and the first gas-liquid heat exchanger form a first circulation line through the connecting line; the buried heat exchange unit, the first Gas-liquid heat exchanger through connection When the pipeline forms the second circulation line,

And controlling, according to the preset control strategy and the obtained environmental information, that at least one of the at least two circulating pipelines is in an open state, and the circulating fluid flows in the opened circulating pipeline, and the step of completing the heat dissipation comprises:

Controlling the opening of the first circulation line and/or the second circulation line according to the preset control strategy and the obtained environmental information, wherein the circulating fluid flowing out of the first gas-liquid heat exchanger flows in through the first circulation line After the corresponding second gas-liquid heat exchanger performs heat dissipation, and circulates back to the first gas-liquid heat exchanger through the first circulation pipeline; and/or, the circulating fluid flowing out from the first gas-liquid heat exchanger passes through The second circulation line flows into the corresponding buried heat exchange unit for heat dissipation, and flows back to the first gas-liquid heat exchanger through the second circulation line.

16. The method according to claim 14, wherein at least one control valve is disposed on each circulation line, and at least one fluid delivery device is disposed on each circulation line, when each circulation line shares a fluid delivery device. ,

Controlling, according to the preset control strategy and the obtained environmental information, that at least one of the at least two circulation lines is in an open state, and the circulating fluid flows in the opened circulation line, and the heat dissipation step is: The preset control strategy and the obtained environmental information control the opening or closing of the corresponding control valve to open at least one circulation line, and the circulating fluid flows in the opened circulation line under the driving of the fluid conveying device to complete the heat dissipation.

17. The method according to claim 14, wherein at least one control valve is disposed on each of the circulation lines, and at least one fluid delivery device is disposed on each of the circulation lines, and different fluid delivery devices are disposed on each of the circulation lines. Time,

Controlling, according to the preset control strategy and the obtained environmental information, that at least one of the at least two circulation lines is in an open state, and the circulating fluid flows in the opened circulation line, and the heat dissipation step is: The preset control strategy and the obtained environmental information, control the opening or closing of the corresponding control valve, open at least one circulation line, and control the flow of the circulating fluid in the corresponding circulation line by the corresponding fluid delivery device, the circulating fluid Flow in the opened circulation line to complete the heat dissipation.

The method according to claim 14, wherein the obtaining the environmental information including at least one of the outdoor temperature of the equipment room and the soil temperature around the buried pipe is: acquiring the outdoor temperature T l of the equipment room and the indoor temperature of the machine room Τ 2 ;

When the second gas-liquid heat exchanger and the first gas-liquid heat exchanger form a first circulation line through the connecting pipeline; the buried heat exchange unit and the first gas-liquid heat exchanger form a second circulation pipeline through the connecting pipeline At least one of the at least two circulation lines is controlled to be in an open state according to the preset control strategy and the obtained environmental information. The steps include:

When the outdoor temperature T1 is greater than the designed maximum allowable temperature Tf of the second gas-liquid heat exchanger, the second circulation line is controlled to be opened, and the circulating fluid is driven by the fluid conveying device to flow in the opened second circulation line to complete the heat dissipation. When T1 is less than or equal to Tf, the first circulation line is controlled to be opened, and the circulating fluid is driven by the fluid conveying device to flow in the opened first circulation line to complete heat dissipation;

When the indoor temperature T2 of the equipment room is higher than the maximum allowable temperature Ts of the equipment room, and the outdoor temperature T1 is greater than the designed maximum working temperature Tf of the second gas-liquid heat exchanger, the first circulation pipeline and the second circulation pipeline are controlled to be opened. The circulating fluid flows in the opened first circulation line and the second circulation line driven by the fluid delivery device to complete heat dissipation.

The method according to claim 14, wherein the obtaining the environmental information including at least one of the outdoor temperature of the equipment room and the soil temperature surrounding the buried pipe is:

Obtain the outdoor temperature of the equipment room T l, the temperature of the underground buried soil Τ3;

When the second gas-liquid heat exchanger and the first gas-liquid heat exchanger form a first circulation line through the connecting pipeline; the buried heat exchange unit and the first gas-liquid heat exchanger form a second circulation pipeline through the connecting pipeline The step of controlling the at least one of the at least two circulation lines to be in an open state according to the preset control strategy and the obtained environmental information includes:

The soil temperature Τ3 around the local buried pipe is smaller than the designed maximum temperature Tm of the underground buried pipe soil, and the second circulation pipe is controlled to be opened, and the circulating fluid flows under the driving of the fluid conveying device in the opened second circulation pipe to complete the heat dissipation. ;

The soil temperature T3 around the local buried pipe is higher than or equal to the designed maximum temperature Tm of the underground buried pipe soil, and

T1 is less than or equal to the designed maximum temperature Tf of the second gas-liquid heat exchanger, and controls the first circulation line to be opened, and the circulating fluid flows in the opened first circulation line under the driving of the fluid conveying device to complete heat dissipation;

When the soil temperature T3 around the local buried pipe is higher than or equal to the designed maximum temperature Tm of the underground buried pipe soil, and T1 is greater than the designed maximum temperature Tf of the second gas-liquid heat exchanger, the first circulation pipeline and the second circulation are controlled. The pipeline is opened, and the circulating fluid is driven by the fluid conveying device to flow in the opened first circulation line and the second circulation line to complete heat dissipation.