A machine room energy-saving system and energy-saving control method
By using a centralized cooling water system and a cooling water flow path controlled by temperature sensors, the problems of heat dissipation, power consumption, and environmental pollution in the computer room have been solved, achieving energy-saving cooling and stable operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI YUANYI CONSTR TECH SERVICE CO LTD
- Filing Date
- 2026-05-20
- Publication Date
- 2026-07-14
AI Technical Summary
Existing computer room cooling methods consume a lot of electricity and are prone to introducing external dust and organisms, affecting equipment stability.
A centralized water cooling system is adopted, which combines external heat exchangers and temperature sensors to control the flow path of cooling water. The system can intelligently switch whether to pass through the heat exchanger for auxiliary cooling based on the external temperature.
It achieves energy saving and cooling, maintains a stable internal environment in the computer room, prevents external dust and organisms from entering, and ensures stable and reliable equipment operation.
Smart Images
Figure CN122395907A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of data center technology, specifically relating to a data center energy-saving system and energy-saving control method. Background Technology
[0002] In existing technologies, computer rooms are important locations for installing various electronic devices, such as telecommunications computer rooms and data processing centers. They have very high environmental requirements, especially the temperature environment. Computer rooms contain a large number of server racks, which generate a lot of heat during operation. Especially with the increasing data processing volume of artificial intelligence, the heat dissipation problem of data processing center computer rooms is receiving more and more attention. At present, most computer room heat dissipation methods are direct air conditioning, water cooling, or a combination of both. Although these heat dissipation methods have good heat dissipation effect, they consume a lot of power resources during use and cannot utilize external environmental conditions for auxiliary heat dissipation.
[0003] Chinese patent CN102345397A discloses an energy-saving computer room, comprising a computer room body with a heat exchange chamber on the outer side of at least one side wall. The heat exchange chamber includes an outer side plate, and a hollow heat exchange interlayer is formed between the outer side plate and the side wall. A heat exchange plate is disposed within the heat exchange interlayer, dividing the interlayer into a first part and a second part. At least two openable and closable indoor vents are provided on the side wall, at least one of which is equipped with a first fan. At least two openable and closable outdoor vents are provided on the outer side plate, at least one of which is equipped with a second fan. The air inside the computer room body and the air outside the heat exchange chamber exchange heat within the heat exchange chamber through the heat exchange plate, carrying away the heat generated inside the computer room body. This energy-saving computer room, with its heat exchange chamber, can fully utilize the external environment to reduce the temperature inside the computer room body, reducing or even eliminating the need for air conditioning, thereby achieving energy conservation. However, this computer room is directly connected to the external environment through a heat exchange chamber, using air circulation for auxiliary cooling. The equipment in the existing computer room has high environmental requirements, including not only temperature requirements but also humidity and cleanliness requirements. Directly using air circulation for auxiliary cooling can easily bring external dust and even insects into the computer room. Furthermore, rainy days can increase the humidity in the computer room, which can affect the operational stability of the equipment and even cause equipment to short circuit. Therefore, there are certain shortcomings. Summary of the Invention
[0004] The purpose of this invention is to provide a data center energy-saving system and energy-saving control method, which can use the external environment to assist in cooling the data center and ensure a stable and reliable internal environment.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: An energy-saving system for a computer room includes: a main body of the computer room and a water-cooling system. The main body of the computer room has multiple slots for placing server racks. Each slot in the main body of the computer room is equipped with a cooling water inlet and a cooling water return outlet. The cooling water inlet is connected to a cooling water inlet pipe, which is connected to the water-cooling system. A heat exchanger and a temperature sensor are respectively installed on the exterior of the main body of the computer room. The cooling water return outlet is connected to a cooling water return pipe. One end of the cooling water return pipe is connected to both the heat exchanger and the water-cooling system via a solenoid valve. The solenoid valve is electrically connected to the temperature sensor. The solenoid valve controls whether the cooling water passes through the heat exchanger when returning to the water-cooling system based on the temperature detected by the temperature sensor.
[0006] As a preferred solution for a data center energy-saving system, the solenoid valve includes a first solenoid valve and a second solenoid valve. The heat exchanger is provided with an inlet and an outlet. The first solenoid valve is connected to the cooling water return pipe, the water cooling system, and the inlet of the heat exchanger. The outlet of the heat exchanger is connected to the water cooling system through an external return pipe. The second solenoid valve is disposed on the external return pipe. The first solenoid valve and the second solenoid valve are electrically connected to the temperature sensor.
[0007] As a preferred solution for a data center energy-saving system, there are two or more heat exchangers. A third solenoid valve is provided between adjacent heat exchangers. The third solenoid valve is connected to the outlet of the previous heat exchanger, the inlet of the next heat exchanger, and the external return pipe. The third solenoid valve is electrically connected to the temperature sensor. The third solenoid valve controls whether the cooling water passes through the next heat exchanger when it returns to the external return pipe, based on the temperature detected by the temperature sensor.
[0008] As a preferred solution for a data center energy-saving system, the heat exchanger has a hollow internal structure and is equipped with folded pipes, with the two ends of the pipes connected to the inlet and the outlet, respectively.
[0009] As a preferred solution for a computer room energy-saving system, the heat exchanger is provided with heat dissipation fins on its outer surface.
[0010] As a preferred solution for a computer room energy-saving system, the heat exchanger has fixed blocks distributed around its outer periphery, and the surface of the fixed blocks is provided with fixed through holes.
[0011] As a preferred solution for the data center energy-saving system, it also includes an elevated floor, which is fixed to the bottom of the main body of the data center. The mounting bracket, the cooling water inlet and the cooling water return outlet are located above the elevated floor, and the cooling water inlet pipe and the cooling water return pipe are located at the bottom of the elevated floor.
[0012] As a preferred solution for a computer room energy-saving system, the lower surface of the overhead floor, the outer wall of the cooling water inlet pipe, and the outer wall of the cooling water return pipe are respectively provided with heat insulation layers.
[0013] The present invention also provides an energy-saving control method for the data center energy-saving system described in any one of the above claims, comprising the following steps: The temperature sensor and solenoid valve are activated, and the temperature sensor collects the external temperature of the main body of the computer room; The water cooling system is started, and the water cooling system provides cooling water to the cooling water inlet through the cooling water inlet pipe. The cooling water inlet enters the cabinet through the connecting pipe for cooling and temperature reduction. The cooling water, after being cooled inside the cabinet, flows back to the cooling water return port through a connecting pipe and enters the cooling water return pipe. The solenoid valve controls whether the cooling water passes through the heat exchanger when it flows back to the water cooling system based on the temperature collected by the temperature sensor. If the temperature collected by the temperature sensor is lower than a first set value, the solenoid valve controls the cooling water to flow through the heat exchanger before flowing back to the water cooling system. If the temperature collected by the temperature sensor is higher than or equal to the first set value, the solenoid valve controls the cooling water to flow directly back to the water cooling system without passing through the heat exchanger.
[0014] As a preferred energy-saving control method for a computer room energy-saving system, the following steps are also included: Start the third solenoid valve; The third solenoid valve controls whether the cooling water passes through the next heat exchanger when it returns to the external return pipe based on the temperature collected by the temperature sensor. Specifically, if the temperature collected by the temperature sensor is higher than or equal to a second set value, the third solenoid valve controls the cooling water to pass through the next heat exchanger before returning to the external return pipe; if the temperature collected by the temperature sensor is lower than the second set value, the third solenoid valve controls the cooling water to return directly to the external return pipe without passing through the next heat exchanger; the second set value is lower than the first set value.
[0015] Beneficial Effects: The energy-saving system for server rooms proposed in this invention features cooling water inlets and return outlets at each rack location. These inlets and outlets are connected to a water-cooling system via cooling water inlet and return pipes, respectively, providing centralized cooling for each server rack. Simultaneously, heat exchangers and temperature sensors are installed externally on the server room structure. The cooling water return pipes are connected to both the water-cooling system and the external heat exchangers via solenoid valves. This allows the solenoid valves to control whether the cooling water passes through the heat exchanger when returning to the water-cooling system based on the temperature detected by the temperature sensor. When the ambient temperature is low, the cooling water first undergoes initial cooling through an external heat exchanger to achieve an auxiliary cooling effect before entering the water cooling system for further cooling, which is more energy-efficient. When the ambient temperature is high, the cooling water directly enters the water cooling system without passing through the external heat exchanger, realizing intelligent switching of auxiliary cooling based on the ambient temperature. Compared with air circulation, the main body of the computer room of this invention can maintain a relatively sealed and stable environment, preventing external dust and even insects and other organisms from being brought into the computer room, and ensuring a stable humidity environment to ensure the stable and reliable operation of the equipment in the computer room. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a data center energy-saving system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a data center energy-saving system according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the main body of the computer room according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the main body of the computer room from another angle, according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the main body of the computer room from another angle, according to an embodiment of the present invention; Figure 6 yes Figure 4 A magnified view of a portion of position A in the middle; Figure 7 This is a cross-sectional structural diagram of a heat exchanger according to an embodiment of the present invention.
[0017] In the picture: 1. Main structure of the computer room; 2. Server rack; 3. Cooling water inlet; 4. Cooling water return outlet; 5. Cooling water inlet pipe; 6. Cooling water return pipe; 7. Heat exchanger; 8. First solenoid valve; 9. Second solenoid valve; 10. External return pipe; 11. Third solenoid valve; 12. Elevated floor; 13. Fixing block. Detailed Implementation
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.
[0019] Example: like Figures 1-6 As shown, one embodiment of the present invention provides a data center energy-saving system, including: a data center main body 1 and a water cooling system. The water cooling system can be a conventional water cooling system of existing technology. The water cooling system can be installed inside or outside the data center main body 1, depending on actual installation needs. The data center main body 1 has multiple slots for placing server racks 2. Specifically, there can be gaps between the slots to ensure the heat dissipation effect of the server racks 2. The slots can adopt a recessed design to ensure that the server racks 2 can be securely fixed in the slots, preventing shaking or displacement and ensuring stable operation of the equipment inside the server racks 2. In some other embodiments, fixing holes can be provided at the four corners of the slots, and the four corners of the server racks 2 can be fixed by four L-shaped fixing plates. The data center main body 1 has a cooling water inlet 3 and a cooling water return outlet 4 corresponding to each slot. The cooling water inlet 3 and cooling water return outlet 4 can be configured as threaded interfaces with sealing rings, facilitating the connection of flexible pipes and other pipelines to the cabinet 2. The cooling water inlet 3 is connected to the cooling water inlet pipe 5, which is connected to the water cooling system. Heat exchangers 7 and temperature sensors are respectively installed on the exterior of the main body 1 of the computer room. Multiple temperature sensors can be distributed at multiple locations outside the main body 1, and the average or median value among them is used to ensure accurate temperature detection and avoid misjudgment of the external temperature due to local temperature anomalies. The cooling water return outlet 4 is connected to the cooling water return pipe 6. One end of the cooling water return pipe 6 is connected to the heat exchanger 7 and the water cooling system respectively through a solenoid valve. The solenoid valve is electrically connected to the temperature sensor. The solenoid valve controls whether the cooling water passes through the heat exchanger 7 when returning to the water cooling system according to the temperature detected by the temperature sensor.
[0020] In the above technical solution, cooling water inlets 3 and 4 are respectively installed at the mounting points, and the cooling water inlets 3 and 4 are connected to the water cooling system via cooling water inlet pipes 5 and 6, respectively, to achieve centralized cooling for each cabinet 2. Simultaneously, heat exchangers 7 and temperature sensors are installed on the exterior of the main computer room 1. The cooling water return pipes 6 are connected to the water cooling system and the external heat exchangers 7 via solenoid valves. This allows the solenoid valves to control whether the cooling water passes through the heat exchanger 7 when returning to the water cooling system based on the temperature detected by the temperature sensor. When the external ambient temperature is low, i.e., lower than the temperature of the returning cooling water, the cooling water first passes through the external heat exchanger 7 for initial cooling, thus achieving auxiliary cooling. The cooling water then enters the water cooling system for further cooling, resulting in greater energy savings. When the external ambient temperature is high (i.e., higher than the return cooling water temperature), heat exchange with the cooling water is not possible, or the external ambient temperature is close to the cooling water temperature, resulting in low heat exchange efficiency. In this case, the cooling water directly enters the water cooling system without passing through the external heat exchanger 7 for cooling. This achieves intelligent switching of auxiliary cooling based on the external ambient temperature. Compared to air circulation, the main body 1 of the computer room of this invention can maintain a relatively sealed and stable environment, which facilitates the internal air conditioning system to control the temperature inside the main body 1 of the computer room, ensuring stable internal temperature and humidity. At the same time, it can also prevent external dust and even insects and other organisms from being brought into the computer room, ensuring the stable and reliable operation of the equipment inside the main body 1 of the computer room.
[0021] In some embodiments, the solenoid valve includes a first solenoid valve 8 and a second solenoid valve 9. The heat exchanger 7 is provided with an inlet and an outlet. The first solenoid valve 8 is a three-way solenoid valve and is connected to the cooling water return pipe 6, the water cooling system, and the inlet of the heat exchanger 7. The outlet of the heat exchanger 7 is connected to the water cooling system through an external return pipe 10. The second solenoid valve 9 is disposed on the external return pipe 10 and is a two-way solenoid valve. The first solenoid valve 8 and the second solenoid valve 9 are electrically connected to the temperature sensor. In this embodiment, when the temperature sensor detects that the external temperature is lower than the first set value, the first solenoid valve 8 switches to a state where the cooling water return pipe 6 and the inlet of the heat exchanger 7 are connected. Simultaneously, the second solenoid valve 9 opens, opening the external return pipe 10 connecting the outlet of the heat exchanger 7 and the water-cooling system. The cooling water in the cooling return pipe 6 first passes through the heat exchanger 7 for auxiliary initial cooling, and then flows back to the water-cooling system through the external return pipe 10 for refrigeration, effectively utilizing the external ambient temperature for cooling, thus saving energy. When the temperature sensor detects that the external temperature is higher than or equal to the first set value, the first solenoid valve 8 switches to a state where the cooling water return pipe 6 and the water-cooling system are connected. Simultaneously, the second solenoid valve 9 closes, closing the external return pipe 10 connecting the outlet of the heat exchanger 7 and the water-cooling system. The cooling water in the cooling return pipe 6 flows directly back to the water-cooling system for refrigeration without passing through the heat exchanger 7. In this embodiment, the overall structure is simple, the operation is stable, and maintenance is convenient. In some other embodiments, the second solenoid valve 9 may be replaced by a check valve; the direction of the check valve is: from the outlet of the heat exchanger 7 to the water cooling system.
[0022] In some embodiments, there are two or more heat exchangers 7. Taking two heat exchangers as an example: a third solenoid valve 11 is provided between adjacent heat exchangers 7. The third solenoid valve 11 is a three-way solenoid valve. The third solenoid valve 11 is connected to the outlet of the previous heat exchanger 7, the inlet of the next heat exchanger 7, and the external return pipe 10. The third solenoid valve 11 is electrically connected to the temperature sensor. The third solenoid valve 11 controls whether the cooling water passes through the next heat exchanger 7 when it returns to the external return pipe 10, based on the temperature detected by the temperature sensor. When the temperature sensor detects that the external temperature is lower than the second set value (where the second set value is lower than the first set value, meaning the external ambient temperature is low, the heat exchanger 7 has high heat exchange efficiency, and the cooling water cools quickly), the third solenoid valve 11 switches to a state where the outlet of the previous heat exchanger 7 and the external return pipe 10 are connected. After the cooling water has been cooled by the previous heat exchanger 7, it flows directly back to the external return pipe 10 without needing to pass through the next heat exchanger 7 for heat exchange and cooling. When the temperature sensor detects that the external temperature is higher than the second set value (where the temperature is between the first and second set values, meaning the external ambient temperature is high, the heat exchanger 7 has low heat exchange efficiency, and the cooling water cools slowly), the third solenoid valve 11 switches to a state where the outlet of the previous heat exchanger 7 and the inlet of the next heat exchanger 7 are connected. After the cooling water has been cooled by the previous heat exchanger 7, it enters the next heat exchanger 7 for heat exchange and cooling, improving the heat exchange and cooling effect, and then flows back to the external return pipe 10. Similarly, when there are three or more heat exchangers 7, taking the two mentioned above as an example, the second setting value corresponding to each third solenoid valve 11 increases sequentially according to the series connection direction of the heat exchangers 7, but the second setting value corresponding to the last third solenoid valve 11 does not exceed the first setting value.
[0023] Reference Figure 7 In some embodiments, the heat exchanger 7 has a hollow internal structure, and folded pipes are arranged inside the heat exchanger 7, with both ends of the pipes connected to the inlet and the outlet, respectively. This pipe design effectively ensures that the cooling water can fully contact and exchange heat within the heat exchanger 7, thus improving the heat exchange efficiency of the cooling water.
[0024] In some embodiments, heat exchanger 7 is provided with heat dissipation fins on its outer surface. These fins effectively improve the heat dissipation and heat exchange efficiency of the heat exchanger, thereby enhancing the cooling effect on the cooling water.
[0025] In some embodiments, fixing blocks 13 are distributed around the outer periphery of the heat exchanger 7, and fixing through holes are provided on the surface of the fixing blocks 13. The fixing blocks 13 can be used with screws to fix the heat exchanger 7 to the external wall or top of the main body of the machine room 1, etc., to ensure that the heat exchanger 7 is easy and simple to install and disassemble, and is firmly fixed.
[0026] In some embodiments, an overhead layer 12 is also included. The overhead layer 12 is fixed to the bottom of the main body 1 of the computer room. The mounting bracket, the cooling water inlet 3, and the cooling water return outlet 4 are located above the overhead layer 12, and the cooling water inlet pipe 5 and the cooling water return pipe 6 are located at the bottom of the overhead layer 12. The design structure of the overhead layer 12 facilitates the concealment of the cooling water inlet pipe 5 and the cooling water return pipe 6 below the overhead layer 12, ensuring a neat and orderly internal environment of the computer room. The structure of the overhead layer 12 can be a frame structure with square holes distributed on its surface. A floor panel is placed on top of the square holes and fixed by means of direct placement and clamping in the square holes or by screws, thereby facilitating the maintenance of the pipes at the bottom of the overhead layer 12.
[0027] In some embodiments, the lower surface of the overhead layer 12, the outer wall of the cooling water inlet pipe 5, and the outer wall of the cooling water return pipe 6 are respectively provided with heat insulation layers. The heat insulation layers serve to insulate against heat, and are made of commonly used heat insulation materials in the prior art, specifically, rubber-plastic sponge for low-temperature pipelines and aluminum silicate fiber for high-temperature pipelines, with an outer protective layer of aluminum foil or fiberglass. Polystyrene foam boards, etc., can be fixed to the lower surface of the overhead layer 12.
[0028] An embodiment of the present invention also provides an energy-saving control method for the data center energy-saving system described in any of the above embodiments, comprising the following steps: S1: Activate the temperature sensor and solenoid valve, and the temperature sensor collects the external temperature of the main body 1 of the computer room; S2: Start the water cooling system. The water cooling system provides cooling water to the cooling water inlet 3 through the cooling water inlet pipe 5. The cooling water inlet 3 enters the cabinet 2 through the connecting pipe for cooling. S3: The cooling water that has been cooled inside the cabinet 2 flows back to the cooling water return port 4 through the connecting pipe and enters the cooling water return pipe 6; S4: The solenoid valve controls whether the cooling water passes through the heat exchanger 7 when it returns to the water cooling system based on the temperature collected by the temperature sensor; wherein, if the temperature collected by the temperature sensor is lower than the first set value, the solenoid valve controls the cooling water to pass through the heat exchanger 7 before returning to the water cooling system; if the temperature collected by the temperature sensor is higher than or equal to the first set value, the solenoid valve controls the cooling water to return directly to the water cooling system without passing through the heat exchanger 7.
[0029] Furthermore, the energy-saving control method of the aforementioned computer room energy-saving system also includes the following steps: S5: Start the third solenoid valve 11; S6: The third solenoid valve 11 controls whether the cooling water passes through the next heat exchanger 7 when it returns to the external return pipe 10, based on the temperature collected by the temperature sensor. Specifically, if the temperature collected by the temperature sensor is higher than or equal to a second set value, the third solenoid valve 11 controls the cooling water to pass through the next heat exchanger 7 before returning to the external return pipe 10; if the temperature collected by the temperature sensor is lower than the second set value, the third solenoid valve 11 controls the cooling water to directly return to the external return pipe 10 without passing through the next heat exchanger 7. The second set value is lower than the first set value. The second set value corresponding to each third solenoid valve 11 increases sequentially according to the series connection direction of the heat exchangers 7, but the second set value corresponding to the last third solenoid valve 11 does not exceed the first set value.
[0030] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A data center energy-saving system, comprising: The main body of the computer room (1) and the water cooling system are characterized in that the main body of the computer room (1) has a plurality of slots for placing cabinets (2) distributed inside, and the main body of the computer room (1) is provided with a cooling water inlet (3) and a cooling water return outlet (4) at each slot. The cooling water inlet (3) is connected to a cooling water inlet pipe (5), and the cooling water inlet pipe (5) is connected to the water cooling system. A heat exchanger (7) and a temperature sensor are respectively provided on the outside of the main body of the computer room (1). The cooling water return outlet (4) is connected to a cooling water return pipe (6). One end of the cooling water return pipe (6) is connected to the heat exchanger (7) and the water cooling system respectively through a solenoid valve. The solenoid valve is electrically connected to the temperature sensor. The solenoid valve controls whether the cooling water passes through the heat exchanger (7) when it returns to the water cooling system according to the temperature detected by the temperature sensor.
2. The data center energy-saving system according to claim 1, characterized in that, The solenoid valve includes a first solenoid valve (8) and a second solenoid valve (9). The heat exchanger (7) is provided with an inlet and an outlet. The first solenoid valve (8) is connected to the cooling water return pipe (6), the water cooling system and the inlet of the heat exchanger (7). The outlet of the heat exchanger (7) is connected to the water cooling system through an external return pipe (10). The second solenoid valve (9) is provided on the external return pipe (10). The first solenoid valve (8) and the second solenoid valve (9) are electrically connected to the temperature sensor.
3. The data center energy-saving system according to claim 2, characterized in that, There are two or more heat exchangers (7). A third solenoid valve (11) is provided between adjacent heat exchangers (7). The third solenoid valve (11) is connected to the outlet of the previous heat exchanger (7), the inlet of the next heat exchanger (7), and the external return pipe (10). The third solenoid valve (11) is electrically connected to the temperature sensor. The third solenoid valve (11) controls whether the cooling water passes through the next heat exchanger (7) when it returns to the external return pipe (10) according to the temperature detected by the temperature sensor.
4. The data center energy-saving system according to claim 2, characterized in that, The heat exchanger (7) has a hollow structure inside and is provided with folded pipes inside. The two ends of the pipes are connected to the inlet and the outlet, respectively.
5. The data center energy-saving system according to claim 1, characterized in that, The heat exchanger (7) has heat dissipation fins on its outer surface.
6. The data center energy-saving system according to claim 1, characterized in that, The heat exchanger (7) has fixed blocks (13) distributed on its outer periphery, and the surface of the fixed blocks (13) is provided with fixed through holes.
7. The data center energy-saving system according to claim 1, characterized in that, It also includes an overhead floor (12), which is fixed to the bottom of the main body of the computer room (1). The card slot, the cooling water inlet (3) and the cooling water return outlet (4) are located above the overhead floor (12), and the cooling water inlet pipe (5) and the cooling water return pipe (6) are located at the bottom of the overhead floor (12).
8. The data center energy-saving system according to claim 7, characterized in that, The lower surface of the overhead layer (12), the outer wall of the cooling water inlet pipe (5), and the outer wall of the cooling water return pipe (6) are respectively provided with heat insulation layers.
9. An energy-saving control method for a computer room energy-saving system according to any one of claims 1-8, characterized in that, Includes the following steps: The temperature sensor and solenoid valve are activated, and the temperature sensor collects the external temperature of the main body of the computer room (1); Start the water cooling system. The water cooling system provides cooling water to the cooling water inlet (3) through the cooling water inlet pipe (5). The cooling water inlet (3) enters the cabinet (2) through the connecting pipe for cooling and temperature reduction. The cooling water that has been cooled inside the cabinet (2) flows back to the cooling water return port (4) through the connecting pipe and enters the cooling water return pipe (6); The solenoid valve controls whether the cooling water passes through the heat exchanger (7) when it flows back to the water cooling system based on the temperature collected by the temperature sensor. If the temperature collected by the temperature sensor is lower than the first set value, the solenoid valve controls the cooling water to flow through the heat exchanger (7) before flowing back to the water cooling system. If the temperature collected by the temperature sensor is higher than or equal to the first set value, the solenoid valve controls the cooling water to flow directly back to the water cooling system without passing through the heat exchanger (7).
10. The energy-saving control method for the computer room energy-saving system according to claim 9, characterized in that, It also includes the following steps: Start the third solenoid valve (11); The third solenoid valve (11) controls whether the cooling water passes through the next heat exchanger (7) when it returns to the external return pipe (10) based on the temperature collected by the temperature sensor. If the temperature collected by the temperature sensor is higher than or equal to the second set value, the third solenoid valve (11) controls the cooling water to pass through the next heat exchanger (7) before returning to the external return pipe (10). If the temperature collected by the temperature sensor is lower than the second set value, the third solenoid valve (11) controls the cooling water to return directly to the external return pipe (10) without passing through the next heat exchanger (7). The second set value is lower than the first set value.