A low ring temperature fresh air mixing system for a data center room

Abstract

The application relates to a low-ambient-temperature fresh air mixing system for a data center room, comprising: a data center room; a fresh air damper arranged at the top of the data center room and used for controlling outdoor fresh air to enter the data center room; a return air damper arranged at the top of the data center room and arranged at the right side of the fresh air damper and used for controlling air circulation in the data center room to return to a supply air cooling air duct; a supply air fan arranged at the top of the data center room and arranged at the right side of the return air damper and used for pushing air flow; a supply air damper arranged at one side of the data center room and used for controlling supply air flow after cooling treatment to enter the data center room; wherein the fresh air damper, the return air damper, the supply air fan and the supply air damper are connected through air ducts to form the supply air cooling air duct. In this way, no matter whether the outdoor environment temperature is in a low-temperature state or an ultralow-temperature state, the application can realize effective temperature control through the supply air cooling air duct.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a low ambient temperature fresh air mixing system for data center computer rooms. Background Technology

[0002] Data center server rooms, as core infrastructure of modern information technology, consume enormous amounts of energy during operation, especially for cooling server equipment. A key indicator for measuring the energy efficiency of a data center is Power Usage Effectiveness (PUE), defined as the ratio of total energy consumption to IT load energy consumption. Ideally, a PUE value close to 1 indicates high energy efficiency. However, servers generate significant heat during operation, which, if not effectively controlled, can lead to a rapid rise in equipment temperature and the risk of overheating and system failure. Therefore, effective cooling equipment is necessary. Commonly used cooling equipment is server room air conditioning, but server room air conditioning itself consumes a large amount of electricity, increasing overall energy consumption and the PUE value.

[0003] To reduce energy consumption and optimize PUE values ​​in data center server rooms, one feasible method is to utilize external low-temperature natural cooling sources for heat dissipation and cooling. Especially in cold regions, under low winter conditions, the server room air conditioning can be directly shut off, such as... Figure 1 As shown, Figure 1 The numbers 1, 2, and 3 in the diagram represent the fresh air valve, fresh air filter, and air supply fan, respectively. By introducing cool outside air, the indoor temperature of the data center server room is lowered, thereby significantly reducing energy consumption. This method not only improves energy efficiency but also reduces operating costs, making low-temperature areas an ideal choice for building data center server rooms.

[0004] However, in extreme low-temperature environments, such as those ranging from -20°C to -50°C, directly introducing fresh air presents new challenges. While such a fresh air system can directly utilize outdoor cold air to cool servers, under such low temperatures, the temperature of the fresh air is far below the required 24°C ambient temperature for data center server rooms, and is often below the indoor dew point temperature. When fresh air is introduced, the moisture in the air quickly condenses into water mist, causing humidity imbalance in the data center server room and potentially forming condensation droplets, which can damage sensitive server equipment. Therefore, in extreme low-temperature environments, the traditional method of directly introducing cold outdoor air is no longer applicable. This not only negates the energy-saving advantages of utilizing natural low-temperature cold sources but may also pose safety hazards to electrical facilities due to humidity issues.

[0005] In summary, although utilizing external low-temperature resources can significantly improve the energy efficiency of data center computer rooms, existing cooling technologies and solutions have obvious shortcomings under extreme low-temperature conditions, and cannot simultaneously meet the requirements of efficient heat dissipation and maintaining a suitable indoor environment for data center computer rooms. Utility Model Content

[0006] In view of the above-mentioned problems of the prior art, this application provides a low ambient temperature fresh air mixing system for data center computer rooms. Regardless of whether the outdoor ambient temperature is low or ultra-low, this application can achieve effective temperature control through the air supply and heat dissipation duct, ensuring that the ambient temperature in the data center computer room can be continuously and stably maintained within the preset temperature range.

[0007] To achieve the above objectives, the first aspect of this application provides a low ambient temperature fresh air mixing system for a data center computer room, comprising: a data center computer room including multiple servers;

[0008] A fresh air valve is installed at the top of the data center server room to control the entry of outdoor fresh air into the data center server room.

[0009] A return air valve is located at the top of the data center server room and to the right of the fresh air valve. It is used to control the air circulation in the data center server room back to the supply air cooling duct.

[0010] An air supply fan is installed at the top of the data center computer room and to the right of the return air valve to drive airflow.

[0011] An air supply damper is installed on one side of the data center computer room to control the airflow that has been cooled before entering the data center computer room.

[0012] The fresh air valve, the return air valve, the air supply fan, and the air supply valve are connected by air ducts to form an air supply and heat dissipation duct. The air supply and heat dissipation duct is used to exchange heat between the return air of the data center and the outdoor fresh air, and to exchange heat between the return air of the data center and the outside low-temperature airflow.

[0013] Thus, in this application, regardless of whether the outdoor ambient temperature is low or extremely low, the application can achieve effective temperature control through the air supply and cooling duct. Specifically, when the outdoor ambient temperature is low, the air supply and cooling duct utilizes the return air from the data center server room to exchange heat with the outdoor fresh air, thereby reducing the supply air temperature and introducing the cooled air into the server room, thus maintaining the ambient temperature within the server room within a preset stable range. When the outdoor ambient temperature is extremely low, the air supply and cooling duct further utilizes the server room return air to conduct deep heat exchange with the ultra-low temperature airflow from the outside, further reducing the supply air temperature, and similarly introducing it into the server room, ensuring that the ambient temperature within the server room can be continuously and stably maintained within the preset temperature range.

[0014] As one possible implementation of the first aspect, a fresh air filter is connected to the fresh air valve, the fresh air filter being used to purify the outdoor fresh air entering the data center server room.

[0015] Thus, this application is equipped with a fresh air filter, which can effectively remove dust, particulate matter and other pollutants from the fresh air entering the data center, ensuring the air quality delivered into the data center, and helping to extend the service life of the servers in the data center and improve their stability.

[0016] As one possible implementation of the first aspect, the data center includes cooling equipment;

[0017] When the outdoor ambient temperature is high, the data center computer room uses its own cooling equipment to cool down the server, wherein the fresh air valve, the return air valve, the air supply fan, and the air supply valve are all in the closed state.

[0018] Thus, when the outdoor ambient temperature is high, in order to avoid increasing the heat load inside the computer room by introducing high-temperature outdoor fresh air, the system chooses to close the fresh air duct, reducing the power consumption required by the cooling equipment to combat the additional heat load and achieving energy saving.

[0019] As one possible implementation of the first aspect, when the outdoor ambient temperature is at a medium temperature, the fresh air valve and the supply air valve are opened, the return air valve is closed, and the supply air fan is operated to directly deliver outdoor fresh air into the data center computer room for heat dissipation and cooling through the supply air cooling duct.

[0020] Thus, under medium temperature conditions, outdoor fresh air is usually cooler than the air temperature inside the data center server room, so outdoor fresh air can be used directly for heat dissipation. The low temperature air brought by the fresh air helps to quickly reduce the temperature inside the server room.

[0021] As one possible implementation of the first aspect, when the outdoor ambient temperature is low, the fresh air valve, the return air valve, and the supply air valve are opened, and the supply air fan is operated. The fresh air and return air are mixed through the supply air cooling duct to adjust the supply air temperature, thereby cooling the data center computer room.

[0022] Thus, in low-temperature environments, outdoor fresh air itself is a good source of cold air. By introducing fresh air and mixing it with the return air in the data center, the supply air temperature can be further reduced, thereby effectively cooling the data center and making full use of natural cold sources, which is in line with the current green and low-carbon development trend.

[0023] As one possible implementation of the first aspect, when the outdoor ambient temperature is extremely low, the fresh air valve is closed, the return air valve and the supply air valve are opened, and the supply air fan is operated. The return air of the data center computer room is exchanged with the low-temperature outside air through the supply air cooling duct, thereby cooling the data center computer room.

[0024] Therefore, in extremely low temperature environments, directly introducing outdoor fresh air may cause the temperature inside the computer room to drop too low, adversely affecting sensitive equipment such as servers. Thus, closing the fresh air valve and relying solely on the return air from the data center computer room to exchange heat with the low-temperature outside air can effectively prevent excessive temperature drops in the computer room and protect servers from freezing damage.

[0025] As one possible implementation of the first aspect, it also includes: a controller;

[0026] The controller is electrically connected to the fresh air valve, the return air valve, the air supply fan, and the air supply valve, respectively.

[0027] The controller is used to control the start and stop of the fresh air valve, the return air valve, the air supply fan, and the air supply valve.

[0028] In this way, the controller can monitor environmental data in real time, such as outdoor temperature and indoor temperature, and automatically adjust the opening or closing status of each valve to ensure that the temperature in the data center server room is always kept within the ideal range, thereby achieving intelligent management.

[0029] It should be noted that the low ambient temperature fresh air mixing system of this application can not only control the on / off state of each valve, but also finely adjust the opening degree of each valve. This capability enables the system to more accurately control the fresh air volume and return air volume supplied to the data center server room, thereby more accurately maintaining the ideal indoor temperature level.

[0030] As one possible implementation of the first aspect, the air supply and heat dissipation duct is designed without insulation.

[0031] Thus, the uninsulated design allows the air supply and cooling ducts to directly exchange heat with the low-temperature outside air. Compared to insulated designs, this design can utilize natural cold sources more effectively, significantly improving heat transfer efficiency. Furthermore, uninsulated designs are generally less expensive than insulated designs; therefore, the long-term operating costs of the system in this application will also be correspondingly reduced.

[0032] As one possible implementation of the first aspect, the air supply and heat dissipation duct is a flat plate type duct.

[0033] Thus, the flat-plate design allows for a more even distribution of airflow within the duct, reducing turbulence and resistance, and further improving heat exchange efficiency. Furthermore, the flat-plate duct design is relatively simple, requiring no complex bends or connectors, resulting in lower manufacturing costs.

[0034] As one possible implementation of the first aspect, the air supply and heat dissipation duct is an air duct with a heat exchange channel.

[0035] Thus, the air duct with heat exchange channels contains specially designed heat exchange structures (such as fins, fins, etc.), which significantly increase the contact area between air and air, thereby greatly improving the heat exchange efficiency. Attached Figure Description

[0036] Figure 1 It is a fresh air system for data center computer rooms in the current technology;

[0037] Figure 2 This is a schematic diagram of a low ambient temperature fresh air mixing system for a data center computer room provided in this application.

[0038] It should be understood that the dimensions and shapes of the blocks in the above structural diagrams are for reference only and should not constitute an exclusive interpretation of the embodiments of the present invention. The relative positions and inclusion relationships between the blocks presented in the structural diagrams are only schematic representations of the structural relationships between the blocks, and are not intended to limit the physical connection methods of the embodiments of the present invention. Detailed Implementation

[0039] The technical solutions provided in this application will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the system architecture and business scenarios provided in the embodiments of this application are mainly for illustrating possible implementations of the technical solutions of this application and should not be construed as the sole limitation on the technical solutions of this application. Those skilled in the art will recognize that the technical solutions provided in this application are equally applicable to similar technical problems as system architectures evolve and new business scenarios emerge.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0041] This application provides a low ambient temperature fresh air mixing system for data center computer rooms, such as... Figure 2 As shown, it includes:

[0042] Data center server room, including multiple servers;

[0043] Fresh air valve 1 is installed at the top of the data center server room and is used to control the entry of outdoor fresh air into the data center server room;

[0044] The return air valve 4 is located at the top of the data center computer room and to the right of the fresh air valve 1, and is used to control the air circulation in the data center computer room back to the supply air cooling duct 5.

[0045] The supply air fan 3 is installed at the top of the data center computer room and is located to the right of the return air valve 4 to drive airflow;

[0046] Air supply valve 6 is installed on one side of the data center computer room and is used to control the airflow after cooling treatment to enter the data center computer room;

[0047] The fresh air valve 1, the return air valve 4, the air supply fan 3, and the air supply valve 6 are connected by air ducts to form an air supply and heat dissipation duct 5. The air supply and heat dissipation duct 5 is used to exchange heat between the return air of the data center computer room and the outdoor fresh air, and to exchange heat between the return air of the data center computer room and the outside low-temperature airflow.

[0048] Thus, in this application, regardless of whether the outdoor ambient temperature is low or extremely low, the air supply and cooling duct 5 can achieve effective temperature control. Specifically, when the outdoor ambient temperature is low, the air supply and cooling duct 5 utilizes the return air from the data center server room to exchange heat with the outdoor fresh air, thereby reducing the supply air temperature and introducing the cooled air into the server room, thus maintaining the ambient temperature within the server room within a preset stable range. When the outdoor ambient temperature is extremely low, the air supply and cooling duct 5 further utilizes the server room return air to conduct deep heat exchange with the ultra-low temperature airflow from the outside, further reducing the supply air temperature, and similarly introducing it into the server room, ensuring that the ambient temperature within the server room can be continuously and stably maintained within the preset temperature range.

[0049] In some embodiments, the system further includes a fresh air filter 2 connected to the fresh air valve 1, the fresh air filter 2 being used to purify the outdoor fresh air entering the data center server room.

[0050] Thus, this application is equipped with a fresh air filter 2, which can effectively remove dust, particulate matter and other pollutants from the fresh air entering the data center, ensuring the air quality delivered into the data center, and helping to extend the service life of the servers in the data center and improve their stability.

[0051] This application can determine a suitable operating mode based on the outdoor ambient temperature, specifically including the following four embodiments.

[0052] In some embodiments, the data center server room includes cooling equipment;

[0053] When the outdoor ambient temperature is high, the data center computer room uses its own cooling equipment to cool down the server, wherein the fresh air valve 1, the return air valve 4, the air supply fan 3 and the air supply valve 6 are all in the closed state.

[0054] For example, when the temperature is 50 degrees Celsius, introducing fresh outdoor air will not effectively lower the temperature inside the data center; instead, it will increase the temperature. In this case, closing the fresh air valve 1, return air valve 4, supply air fan 3, and supply air valve 6 will prevent reverse heating. Relying on the data center's own cooling equipment will ensure that the servers are always within a suitable operating temperature range, avoiding performance degradation or hardware damage due to overheating.

[0055] Thus, when the outdoor ambient temperature is high, in order to avoid increasing the heat load inside the computer room by introducing high-temperature outdoor fresh air, the system chooses to close the fresh air duct, reducing the power consumption required by the cooling equipment to combat the additional heat load and achieving energy saving.

[0056] In some embodiments, when the outdoor ambient temperature is at a medium temperature, the fresh air valve 1 and the supply air valve 6 are opened, the return air valve 4 is closed, and the supply air fan 3 is operated to directly deliver outdoor fresh air into the data center computer room for heat dissipation and cooling through the supply air cooling duct 5.

[0057] For example, the medium temperature is 20 degrees Celsius.

[0058] Thus, under medium temperature conditions, outdoor fresh air is usually cooler than the air temperature inside the data center server room, so outdoor fresh air can be used directly for heat dissipation. The low temperature air brought by the fresh air helps to quickly reduce the temperature inside the server room.

[0059] In some embodiments, when the outdoor ambient temperature is low, the fresh air valve 1, the return air valve 4, and the supply air valve 6 are opened, and the supply air fan 3 is operated. The fresh air and return air are mixed through the supply air cooling duct 5 to adjust the supply air temperature, thereby cooling the data center computer room.

[0060] For example, the low temperature is 0 degrees Celsius.

[0061] Thus, in low-temperature environments, outdoor fresh air itself is a good source of cold air. By introducing fresh air and mixing it with the return air in the data center, the supply air temperature can be further reduced, thereby effectively cooling the data center and making full use of natural cold sources, which is in line with the current green and low-carbon development trend.

[0062] In some embodiments, when the outdoor ambient temperature is extremely low, the fresh air valve 1 is closed, the return air valve 4 and the supply air valve 6 are opened, and the supply air fan 3 is operated. The return air of the data center computer room is exchanged with the low-temperature outside air through the supply air cooling duct 5, thereby cooling the data center computer room.

[0063] For example, the low temperature is -30 degrees Celsius.

[0064] Therefore, in extremely low temperature environments, directly introducing outdoor fresh air may cause the temperature inside the computer room to drop too low, adversely affecting sensitive equipment such as servers. Thus, closing the fresh air valve 1 and utilizing only the return air from the data center computer room to exchange heat with the low-temperature outside air can effectively prevent excessive temperature drops in the computer room and protect the servers from freezing damage.

[0065] In summary, this application can switch to four different operating modes according to different outdoor ambient temperatures: high temperature shutdown, medium temperature fresh air introduction, low temperature mixed air regulation, and ultra-low temperature return air heat exchange. This flexibility enables the system to adapt to a wide range of climatic conditions, ensuring that the data center server room always maintains a suitable operating temperature.

[0066] It is worth noting that the low ambient temperature fresh air mixing system of this application can not only effectively save energy and cool down at low ambient temperatures, but also introduce fresh air normally under normal conditions. Therefore, it can directly replace the fresh air system used in data center computer rooms in the prior art (such as...). Figure 1 (As shown).

[0067] In some embodiments, it further includes: a controller;

[0068] The controller is electrically connected to the fresh air valve 1, the return air valve 4, the air supply fan 3, and the air supply valve 6, respectively.

[0069] The controller is used to control the start and stop of the fresh air valve 1, the return air valve 4, the air supply fan 3, and the air supply valve 6.

[0070] In this way, the controller can monitor environmental data in real time, such as outdoor temperature and indoor temperature, and automatically adjust the opening or closing status of each valve to ensure that the temperature in the data center server room is always kept within the ideal range, thereby achieving intelligent management.

[0071] In some embodiments, the air supply and heat dissipation duct 5 is designed without insulation.

[0072] Thus, the uninsulated design allows the air supply and cooling duct 5 to directly exchange heat with the low-temperature outside air. Compared to an insulated design, this design can utilize natural cold sources more effectively, significantly improving heat transfer efficiency. Furthermore, uninsulated designs are generally less expensive than insulated designs; therefore, the long-term operating costs of the system in this application will also be reduced accordingly.

[0073] In some embodiments, the air supply and heat dissipation duct 5 is a flat duct.

[0074] Thus, the flat-plate design allows for a more even distribution of airflow within the duct, reducing turbulence and resistance, and further improving heat exchange efficiency. Furthermore, the flat-plate duct design is relatively simple, requiring no complex bends or connectors, resulting in lower manufacturing costs.

[0075] In some embodiments, the air supply and heat dissipation duct 5 is an air duct with a heat exchange channel.

[0076] For example, the air duct with heat exchange channels contains specially designed heat exchange structures (such as fins, slats, etc.) that significantly increase the contact area between air and air, thereby greatly improving heat exchange efficiency.

[0077] In practical applications, users can set the required air supply and heat dissipation duct 5. The specific type of duct is not limited here, which improves the design flexibility and meets the needs of different scenarios.

[0078] The following section, in conjunction with the above structural description, combines... Figure 2 The working principle of the low ambient temperature fresh air mixing system described in this application is illustrated below.

[0079] This application allows for different operating modes depending on outdoor ambient temperature to ensure the internal temperature of the data center remains within a suitable range, thereby guaranteeing the safe operation of servers and other equipment. The following is a detailed explanation of four application scenarios:

[0080] Scenario 1: High-temperature outdoor environment

[0081] Specifically, due to the high outdoor temperature, it is not suitable to directly introduce fresh air to cool the interior of the data center server room. Therefore, the system does not use outside fresh air, but relies on the data center server room's own cooling equipment for cooling. At this time, all valves related to the introduction of fresh air, namely fresh air valve 1, return air valve 4, supply air valve 6, and supply air fan 3, are in the closed state to prevent hot outside air from entering.

[0082] Scenario 2: External environment of the greenhouse

[0083] Specifically, when the outdoor temperature is moderate, fresh outside air can be used directly to cool the data center server room. At this time, the system will open the fresh air valve 1 and the supply air valve 6, and start the supply air fan 3 to directly deliver fresh outside air into the data center server room to remove the heat generated by the servers. Meanwhile, to prevent the loss of indoor air, the return air valve remains closed.

[0084] Scenario 3: Low-temperature outdoor environment

[0085] Specifically, if the outdoor temperature is low, directly introducing fresh air may cause the temperature inside the data center server room to drop too low. In this case, the system will open the fresh air valve 1 and the return air valve 4, and start the supply air fan 3 to mix some indoor air with fresh outdoor air, forming a gentler airflow to achieve a suitable supply air temperature. At the same time, the system will open the supply air valve 6. This effectively dissipates heat without affecting equipment operation due to excessive cooling.

[0086] Scenario 4: Extremely low temperature outdoor environment

[0087] Specifically, when the outside temperature is extremely low, even the mixed airflow described in scenario three above may cause the temperature inside the data center to drop too low. In this case, the system will choose not to use fresh air and will rely entirely on return air, i.e., the air inside the data center. At this time, the system will open the return air valve 4 and the supply air valve 6, start the supply air fan 3, and close the fresh air valve 1. Through a specially designed non-insulated supply air cooling duct 5, this return air indirectly exchanges heat with the extremely low-temperature outside air, thereby regulating the supply air temperature and ensuring that the internal temperature of the data center remains stable within the ideal range.

[0088] In summary, the above four scenarios are all designed to adapt to different external climatic conditions, ensuring that data center countermeasures can operate efficiently and securely in various environments.

[0089] Furthermore, the terms "first, second, third, etc." or similar terms such as module A, module B, and module C used in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that, where permissible, a specific order or sequence may be interchanged so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0090] The term "comprising" as used in the specification and claims should not be construed as limiting itself to what follows; it does not exclude other elements or steps. Therefore, it should be interpreted as specifying the presence of the mentioned feature, integral, step, or component, but does not exclude the presence or addition of one or more other features, integrals, steps, or components, or groups thereof. Thus, the statement "device comprising means A and B" should not be limited to a device consisting solely of components A and B.

[0091] The terms "an embodiment" or "an embodiment" as used in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in at least one embodiment of this application. Therefore, the terms "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics can be combined in any suitable manner, as will be apparent to those skilled in the art from this disclosure.

[0092] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, all of which fall within the scope of protection of this application.

Claims

1. A low-ambient-temperature fresh air mixing system for data center computer rooms, characterized in that, include: Data center server room, including multiple servers; Fresh air valve (1) is installed at the top of the data center computer room to control the entry of outdoor fresh air into the data center computer room; The return air valve (4) is located at the top of the data center computer room and to the right of the fresh air valve (1), and is used to control the air circulation in the data center computer room back to the supply air cooling duct (5). A supply fan (3) is installed at the top of the data center computer room and to the right of the return air valve (4) to drive airflow. An air supply valve (6) is installed on one side of the data center computer room to control the air supply airflow after cooling treatment to enter the data center computer room; The fresh air valve (1), the return air valve (4), the air supply fan (3), and the air supply valve (6) are connected by a duct to form an air supply and heat dissipation duct (5). The air supply and heat dissipation duct (5) is used to exchange heat between the return air of the data center computer room and the outdoor fresh air, and to exchange heat between the return air of the data center computer room and the outside low-temperature airflow.

2. The low ambient temperature fresh air mixing system according to claim 1, characterized in that, Also includes: A fresh air filter (2) is connected to the fresh air valve (1) and is used to purify the outdoor fresh air entering the data center computer room.

3. The low ambient temperature fresh air mixing system according to claim 1, characterized in that, The data center server room includes cooling equipment; When the outdoor ambient temperature is high, the data center computer room cools the server by means of its own cooling equipment, wherein the fresh air valve (1), the return air valve (4), the air supply fan (3) and the air supply valve (6) are all in the closed state.

4. The low ambient temperature fresh air mixing system according to claim 1, characterized in that, When the outdoor ambient temperature is at a medium temperature, the fresh air valve (1) and the supply air valve (6) are opened, the return air valve (4) is closed, and the supply air fan (3) is turned on. The outdoor fresh air is directly sent into the data center computer room for heat dissipation and cooling through the supply air cooling duct (5).

5. The low ambient temperature fresh air mixing system according to claim 1, characterized in that, When the outdoor ambient temperature is low, the fresh air valve (1), the return air valve (4) and the supply air valve (6) are opened, and the supply air fan (3) is operated. The fresh air and return air are mixed through the supply air cooling duct (5) to adjust the supply air temperature, thereby cooling the data center computer room.

6. The low ambient temperature fresh air mixing system according to claim 1, characterized in that, When the outdoor ambient temperature is extremely low, the fresh air valve (1) is closed, the return air valve (4) and the supply air valve (6) are opened, and the supply air fan (3) is turned on. The return air of the data center computer room is exchanged with the low-temperature air outside through the supply air heat dissipation duct (5), thereby cooling the data center computer room.

7. The low ambient temperature fresh air mixing system according to any one of claims 3 to 6, characterized in that, Also includes: Controller; The controller is electrically connected to the fresh air valve (1), the return air valve (4), the air supply fan (3), and the air supply valve (6), respectively. The controller is used to control the start and stop of the fresh air valve (1), the return air valve (4), the air supply fan (3), and the air supply valve (6).

8. The low ambient temperature fresh air mixing system according to claim 1, characterized in that, The air supply and heat dissipation duct (5) is designed without insulation.

9. The low ambient temperature fresh air mixing system according to claim 1, characterized in that, The air supply and heat dissipation duct (5) is a flat duct.

10. The low ambient temperature fresh air mixing system according to claim 1, characterized in that, The air supply and heat dissipation duct (5) is a duct with a heat exchange channel.

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