Machine room air conditioner energy-saving system

Abstract

The invention discloses a machine room air conditioner energy-saving system which comprises a machine room air conditioner. The fresh air conditioner comprises a fresh air machine and a refrigerant loop, and in the refrigerant loop, a refrigerant circulates in a compressor, a condenser, a throttling device and an evaporator in sequence; an exhaust fan; the controller is configured to control the fresh air machine and the exhaust fan to be started when the outdoor environment temperature is not larger than the indoor set temperature and the indoor and outdoor temperature difference reaches the temperature difference threshold value or above. If the outdoor environment temperature is not larger than the indoor set temperature and the indoor and outdoor temperature difference is lower than the temperature difference threshold value, a compressor, a fresh air machine and an exhaust fan are controlled to be started; and if the outdoor environment temperature is higher than the indoor set temperature, controlling the machine room air conditioner to operate in a refrigeration mode. According to the energy-saving and cooling system, the fresh air supply or refrigeration mode of the fresh air conditioner and the exhaust fan are started in the low-temperature range of different outdoor environment temperatures, and energy-saving and cooling in the machine room are achieved in different combination modes.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, and in particular relates to an energy-saving air conditioning system for computer rooms. Background Technology

[0002] During the operation of telecommunications equipment rooms, various types of equipment generate a lot of heat due to power consumption. In order to ensure the normal operation of communication equipment, it is necessary to cool down the equipment in the equipment room in a timely manner to ensure the normal operation of the equipment.

[0003] In related technologies, natural wind or air conditioning, or a combination of both, are generally used alone to cool the internal environment of the computer room. If outdoor weather conditions permit, the cooling capacity required by the computer room can be provided by outdoor natural wind, that is, using outdoor natural wind to cool the computer room can achieve the effect of energy conservation and emission reduction.

[0004] However, when outdoor weather conditions are poor, cooling methods often involve using the computer room air conditioner alone, or combining it with natural ventilation. Existing computer room air conditioners have high maximum input power and consume a lot of electricity. This cooling method cannot effectively balance cooling efficiency and power consumption reduction, resulting in persistently high power consumption in communication computer rooms. Therefore, providing a computer room air conditioning system that offers high cooling efficiency, ideal cooling effect, and greater energy savings has become an urgent problem to be solved. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in the related art. Therefore,

[0006] According to embodiments of this disclosure, a data center air conditioning energy-saving system is provided, comprising:

[0007] Computer room air conditioning;

[0008] An exhaust fan, the air inlet of which is connected to the interior of the machine room, and the air outlet of which is connected to the exterior of the machine room;

[0009] Fresh air conditioning unit, the fresh air conditioning unit includes:

[0010] An indoor unit, installed inside the computer room, includes a fresh air unit, an indoor heat exchanger, a fresh air inlet communicating with the outdoor environment, and an air outlet communicating with the interior of the computer room. The fresh air unit is used to introduce fresh outdoor air into the computer room.

[0011] The outdoor unit, which includes a compressor and an outdoor heat exchanger;

[0012] In the refrigerant circuit of the fresh air conditioner, the refrigerant circulates sequentially through the compressor, condenser, throttling device, and evaporator; one of the condenser and the evaporator is the outdoor heat exchanger, and the other is the indoor heat exchanger.

[0013] The data center energy-saving system also includes:

[0014] An outdoor temperature sensor is used to detect the outdoor ambient temperature, and the difference between the indoor set temperature and the outdoor ambient temperature is defined as the indoor-outdoor temperature difference;

[0015] The controller is connected at least to the fresh air conditioner, the computer room air conditioner, and the exhaust fan, and the controller is configured to:

[0016] If the outdoor ambient temperature is not greater than the indoor set temperature, and the indoor-outdoor temperature difference reaches or exceeds the temperature difference threshold, the fresh air fan and the exhaust fan will be turned on. At this time, the cooling capacity required in the computer room will be entirely provided by the outdoor fresh air.

[0017] If the outdoor ambient temperature is not greater than the indoor set temperature and the indoor-outdoor temperature difference is lower than the temperature difference threshold, the compressor is controlled to start, and the fresh air fan and the exhaust fan are also controlled to start. At this time, the outdoor fresh air enters the indoor unit through the fresh air inlet, is cooled, and is blown out through the air outlet for heat dissipation in the computer room.

[0018] If the outdoor ambient temperature is higher than the indoor set temperature, the computer room air conditioner is controlled to operate in cooling mode, and the fresh air unit, the exhaust fan and the compressor stop running. At this time, the cooling capacity required in the computer room is provided only by the computer room air conditioner.

[0019] The energy-saving air conditioning system for computer rooms provided by this technical solution utilizes a fresh air conditioning system to introduce fresh outdoor air into the computer room. When the outdoor ambient temperature is low, it achieves cooling of the computer room in an energy-saving manner based on the temperature difference between indoors and outdoors. Specifically, when the temperature difference between indoors and outdoors reaches a threshold value, the computer room is cooled entirely by fresh outdoor air, resulting in the best energy-saving effect. When the temperature difference between indoors and outdoors is below the threshold value, the compressor is further activated, working in conjunction with the indoor heat exchanger to cool the outdoor fresh air before it is sent into the computer room for heat dissipation. This reduces the operating time and energy consumption of the computer room air conditioning system, lowers costs, and provides better energy-saving performance compared to existing technologies.

[0020] According to an embodiment of this disclosure, the controller is further configured to control the exhaust fan to be linked with the fresh air fan so as to balance the exhaust volume and the fresh air volume; wherein the start of the exhaust fan is conditional upon the start of the fresh air fan; by controlling the fresh air fan and the exhaust fan to be linked, the air exchange efficiency is improved while ensuring the normal pressure inside the computer room.

[0021] According to embodiments of this disclosure, the controller is further configured to adjust the fan speed of the fresh air unit based on the indoor-outdoor temperature difference. Reducing unnecessary fan speed can lower energy consumption and save operating costs.

[0022] According to embodiments of this disclosure, the fresh air unit has multiple fan speed settings, and adjusting the fan speed settings of the fresh air unit according to the indoor-outdoor temperature difference includes:

[0023] When the outdoor ambient temperature is not greater than the indoor set temperature, the allowable value of the indoor-outdoor temperature difference is divided into multiple preset intervals, and each of the multiple preset intervals corresponds to a different wind speed level; wherein, as the preset interval increases, the wind speed level decreases.

[0024] Based on the preset range of the indoor and outdoor temperature difference and the correspondence between the preset range and the wind speed level, the fresh air unit is controlled to operate at the corresponding wind speed level.

[0025] In this technical solution, the higher the temperature difference between indoors and outdoors, that is, the lower the outdoor ambient temperature, the higher the corresponding wind speed setting, which helps to reduce energy consumption and lower operating costs.

[0026] According to embodiments of this disclosure, the controller is configured to calculate the temperature difference threshold based on the upper limit of the heat generation of the computer room communication equipment and its corresponding cooling demand. The temperature difference threshold is calculated using the upper limit of the heat generation, and the operating mode of the fresh air conditioning system is determined based on the temperature difference threshold. This ensures that when only the fresh air unit is running, the outdoor fresh air can completely offset the heat generation in the computer room, eliminating the need to turn on the compressor and achieving optimal energy savings.

[0027] According to embodiments of this disclosure, the data center air conditioning energy-saving system further includes:

[0028] An indoor temperature sensor is used to detect the temperature inside the computer room, and this temperature is defined as the indoor ambient temperature.

[0029] An outdoor humidity sensor is installed at the fresh air inlet to detect the outdoor ambient humidity.

[0030] The controller is also configured to:

[0031] If the outdoor ambient humidity is not greater than the indoor set humidity and the indoor ambient temperature is not greater than the indoor set temperature, the fresh air unit and the exhaust fan are turned on, and the compressor is not turned on.

[0032] If the outdoor humidity exceeds the indoor set humidity or the indoor temperature is greater than the indoor set temperature, the compressor is controlled to start, and the fresh air fan and the exhaust fan are also controlled to start.

[0033] In this technical solution, the operating status of the compressor and fresh air unit can be controlled by the outdoor ambient humidity and indoor ambient temperature, so as to better meet the control requirements of the computer room environment.

[0034] According to an embodiment of this disclosure, the controller is further configured to control the fresh air conditioner to shut down when the detected indoor ambient temperature reaches the indoor set temperature.

[0035] According to embodiments of this disclosure, the controller is further configured to,

[0036] Obtain the cumulative operating time of the fresh air unit;

[0037] When the cumulative runtime reaches or exceeds the runtime threshold, the fresh air conditioner is controlled to operate in self-cleaning mode.

[0038] According to an embodiment of this disclosure, the indoor unit is mounted on the floor of the computer room, and the air outlet is oriented away from the ground to deliver air over long distances, thereby improving the heat dissipation effect of the computer room.

[0039] According to embodiments of this disclosure, a data center air conditioning energy-saving system is provided, comprising:

[0040] Computer room air conditioning;

[0041] An exhaust fan, the air inlet of which is connected to the interior of the machine room, and the air outlet of which is connected to the exterior of the machine room;

[0042] Fresh air conditioning unit, the fresh air conditioning unit includes:

[0043] An indoor unit, installed outside the computer room, includes a fresh air unit, an indoor heat exchanger, a fresh air inlet communicating with the outdoor environment, and an air outlet communicating with the interior of the computer room. The fresh air unit is used to introduce fresh outdoor air into the computer room.

[0044] The outdoor unit, which includes a compressor and an outdoor heat exchanger;

[0045] In the refrigerant circuit of the fresh air conditioner, the refrigerant circulates sequentially through the compressor, condenser, throttling device, and evaporator; one of the condenser and the evaporator is the outdoor heat exchanger, and the other is the indoor heat exchanger.

[0046] The data center energy-saving system also includes:

[0047] An outdoor temperature sensor is used to detect the outdoor ambient temperature, and the difference between the indoor set temperature and the outdoor ambient temperature is defined as the indoor-outdoor temperature difference;

[0048] The controller is connected at least to the fresh air conditioner, the computer room air conditioner, and the exhaust fan, and the controller is configured to:

[0049] If the outdoor ambient temperature is not greater than the indoor set temperature, and the indoor-outdoor temperature difference reaches or exceeds the temperature difference threshold, the fresh air fan and the exhaust fan will be turned on. At this time, the cooling capacity required in the computer room will be entirely provided by the outdoor fresh air.

[0050] If the outdoor ambient temperature is not greater than the indoor set temperature and the indoor-outdoor temperature difference is lower than the temperature difference threshold, the compressor is controlled to start, and the fresh air fan and the exhaust fan are also controlled to start. At this time, the outdoor fresh air enters the indoor unit through the fresh air inlet, is cooled, and is blown out through the air outlet for heat dissipation in the computer room.

[0051] If the outdoor ambient temperature is higher than the indoor set temperature, the computer room air conditioner is controlled to operate in cooling mode, and the fresh air unit, the exhaust fan and the compressor stop running. At this time, the cooling capacity required in the computer room is provided only by the computer room air conditioner.

[0052] The energy-saving air conditioning system for computer rooms provided by this technical solution has indoor units installed outside the computer room, making it suitable for smaller computer rooms and increasing its applicability. It introduces fresh outdoor air into the computer room through a fresh air conditioning unit. When the outdoor ambient temperature is low and the indoor-outdoor temperature difference exceeds a certain threshold, the computer room is cooled entirely by the fresh outdoor air, resulting in optimal energy savings. When the indoor-outdoor temperature difference is below the threshold, the compressor is activated, working in conjunction with the indoor heat exchanger to cool the outdoor fresh air before it is sent into the computer room for further cooling. This reduces the operating time and energy consumption of the computer room air conditioning, lowers costs, and achieves energy savings. Attached Figure Description

[0053] Figure 1 This is a system block diagram of a computer room air conditioning energy-saving system according to an embodiment of this disclosure;

[0054] Figure 2 This is a structural block diagram of a fresh air conditioning unit according to an embodiment of this disclosure;

[0055] Figure 3 This is a schematic diagram of the refrigerant circuit according to an embodiment of this disclosure;

[0056] Figure 4 This is a perspective view of the indoor unit according to an embodiment of the present disclosure;

[0057] Figure 5 This is a schematic diagram of the internal structure of the indoor unit according to an embodiment of the present disclosure;

[0058] Figure 6 This is a perspective view of the indoor unit from another perspective according to an embodiment of the present disclosure;

[0059] Figure 7 This is a partial exploded view of the indoor unit according to an embodiment of the present disclosure;

[0060] Figure 8 This is the control logic for energy-saving cooling based on the indoor-outdoor temperature difference according to the embodiments of this disclosure;

[0061] Figure 9 The control logic for controlling the operation of the fresh air conditioning system according to the outdoor ambient humidity and indoor ambient temperature is based on the embodiments of this disclosure.

[0062] Figure 10 This is the control logic for cooling the computer room air conditioning energy-saving system according to the embodiments of this disclosure;

[0063] Figure 11 This is the control logic for the operation of the computer room air conditioning energy-saving system according to the embodiments of this disclosure.

[0064] In the above diagrams: 100 for computer room air conditioning energy-saving system; 10 for computer room air conditioner; 20 for fresh air conditioner; 30 for controller; 40 for exhaust fan; 1 for indoor unit; 11 for indoor heat exchanger; 12 for fresh air unit; 13 for casing; 14 for fresh air outlet; 15 for air outlet; 16 for air inlet grille; 17 for purification device; 2 for outdoor unit; 21 for outdoor heat exchanger; 22 for compressor; 3 for throttling device; 4 for refrigerant circuit. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0066] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0067] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0068] The terms "connection," "linked," and "coupled" used in this application are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Multiple" in this application refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, "A and / or B" can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0069] This invention provides a data center air conditioning energy-saving system. This system is used to cool the data center, ensuring that communication equipment within the data center operates at a set indoor temperature, thus preventing damage to the equipment due to overheating. See below for reference. Figures 1-11 The energy-saving air conditioning system for computer rooms provided in this application is described.

[0070] In one illustrative embodiment of the data center air conditioning energy-saving system 100 provided by the present invention, reference is made to... Figure 1 The data center air conditioning energy-saving system 100 may include a data center air conditioner 10. The data center air conditioner 10 is installed indoors and can be used for cooling the data center.

[0071] In related technologies, data center air conditioners (10) are mostly large-scale 5P and 3P air conditioning units. Among them, the maximum input power of a 5P data center air conditioner (10) is 5KW, and the maximum input power of a 3P data center air conditioner (10) is 3.15KW. Using data center air conditioners (10) to cool data centers throughout the year consumes a lot of electricity and is costly.

[0072] To achieve energy conservation and emission reduction, in this embodiment, the data center air conditioning energy-saving system may include a fresh air conditioner 20. The fresh air conditioner 20 can introduce fresh outdoor air into the data center, that is, it can use natural wind to cool the data center, reducing the usage time of the data center air conditioner 10 and effectively achieving the effect of energy saving and cooling.

[0073] It is understandable that the maximum input power of the fresh air conditioner 20 is much smaller than that of the computer room air conditioner 10. In this embodiment, a fresh air conditioner 20 with a maximum input power of about 1.5KW is selected.

[0074] refer to Figure 2 The fresh air conditioning unit 20 may include an indoor unit 1, which can introduce fresh outdoor air into the computer room. The indoor unit 1 can be installed indoors. The energy-saving computer room air conditioning system provided in this embodiment is suitable for large computer rooms.

[0075] Of course, in some other embodiments, the indoor unit 1 can be installed outside the computer room. Some computer rooms are too small to be suitable for indoor unit 1 installation. In such cases, the indoor unit 1 can be installed outside the computer room to supply air to the room.

[0076] The indoor unit 1 can be installed either internally or externally depending on the size of the computer room, which improves installation flexibility and adaptability.

[0077] The fresh air conditioner 20 may include an outdoor unit 2. The outdoor unit 2 is usually installed outdoors and is used to carry indoor heat to the outside.

[0078] The indoor unit 1 and the outdoor unit 2 can be configured as an integrated unit or a split unit.

[0079] refer to Figure 3 The fresh air conditioning unit 20 may include a refrigerant circuit 4. (Reference) Figure 3 The diagram shows the structure of refrigerant circuit 4. (Refer to...) Figure 2 The refrigerant circuit 4 is formed by connecting pipes to the indoor unit 1 and the outdoor unit 2 to form a refrigerant circulation loop.

[0080] The fresh air conditioner 20 uses refrigerant circuit 4 to circulate refrigerant through compressor 22, condenser, throttling device 3 and evaporator in sequence, which can cool the outdoor fresh air.

[0081] Among them, one of the evaporators and the condenser is an indoor heat exchanger 11, and the other is an outdoor heat exchanger 21.

[0082] refer to Figures 4-7 The indoor unit 1 may include a housing 13. The housing 13 forms the appearance of the indoor unit 1.

[0083] An installation cavity is formed inside the housing 13. The installation cavity is used to accommodate and fix various components in the indoor unit 11, which can prevent foreign objects from colliding with the various components inside the housing 13, thereby improving the reliability of the indoor unit 11 during transportation or installation.

[0084] The indoor unit 1 may include a fresh air inlet 14. The fresh air inlet 14 is located on the casing 13 and is connected to the outdoor environment.

[0085] The fresh air inlet 14 is connected to the mounting cavity. As the inlet for external air to flow into the casing 13, the fresh air inlet 14 allows outdoor fresh air to enter the mounting cavity.

[0086] The indoor unit 1 may include an air outlet 15. The air outlet 15 is disposed on the casing 13 and is connected to the interior of the machine room.

[0087] The air outlet 15 is connected to the mounting cavity. The air outlet 15 serves as the outlet for airflow within the housing 13, allowing airflow within the mounting cavity to flow out through the air outlet 15.

[0088] When indoor unit 1 is installed inside the computer room, its base is placed on the floor of the computer room. At this time, the air outlet 15 is oriented away from the ground, that is, the air outlet of indoor unit 1 is upward air outlet, which can achieve long-distance air supply and improve the heat dissipation effect of the computer room.

[0089] In some embodiments of this application, the fresh air conditioner 20 may include an air inlet grille 16.

[0090] The air intake grille 16 is located at the fresh air inlet 14 to filter the outdoor fresh air and prevent larger impurities from entering the casing.

[0091] Indoor unit 1 may include a fresh air unit 12. The fresh air unit 12 is installed inside the housing 13 and drives the air in the installation cavity to flow along the fresh air inlet 14 toward the air outlet 15. The fresh air unit 12 is used to introduce outdoor fresh air into the machine room.

[0092] In this embodiment, the fresh air unit 12 can be a centrifugal fan.

[0093] Indoor unit 1 may include indoor heat exchanger 11.

[0094] The indoor heat exchanger 11 is located inside the installation cavity and is used to exchange heat with the outdoor fresh air inside the casing 13.

[0095] The mounting cavity is divided into a first inner cavity and a second inner cavity by a partition plate. The partition plate has a through-hole, through which the first and second inner cavities communicate. In this embodiment, the fresh air unit 12 is installed in the second inner cavity, and the indoor heat exchanger 11 is installed in the first inner cavity.

[0096] In this embodiment, the indoor heat exchanger 11 is positioned relative to the fresh air unit 12 near the fresh air inlet 14. That is, in the airflow direction within the casing 13, the indoor heat exchanger 11 is located upstream of the indoor fan. Of course, in some other embodiments, the indoor heat exchanger 11 may also be located on the side of the fresh air unit 12 near the air outlet 15.

[0097] In some embodiments of this application, the fresh air conditioner 20 may include a purification device 17, which is installed inside the housing 13 and located between the fresh air inlet 14 and the indoor heat exchanger 11, for purifying the outdoor fresh air entering the indoor unit 1.

[0098] In some embodiments of this application, the fresh air conditioner 20 may include an electrical box. In the airflow direction within the housing 13, the electrical box is located downstream of the indoor heat exchanger 11, such that when the fresh air conditioner 20 is running, the lower-temperature outdoor fresh air flows through the electrical box for heat dissipation, or the lower-temperature outdoor fresh air exchanges heat with the indoor heat exchanger 11 and then flows through the electrical box for heat dissipation, thus improving the heat dissipation effect of the electrical box.

[0099] Outdoor unit 2 may include an outdoor unit housing. The outdoor unit housing has internal storage space and forms the appearance of outdoor unit 2.

[0100] The outdoor unit housing may include an outdoor air intake. The outdoor air intake may communicate with the housing space. The outdoor air intake can be used to introduce outdoor air into the housing space.

[0101] The outdoor unit casing may include an outdoor air outlet. The outdoor air outlet may communicate with the housing. The outdoor air outlet can be used to draw air from the housing to the outside of the housing.

[0102] The outdoor unit 2 may include an outdoor heat exchanger 21. The outdoor heat exchanger 21 may be located within the housing space.

[0103] Outdoor unit 2 may include an outdoor fan. The outdoor fan may be installed within the housing. The rotation of the outdoor fan causes outdoor air to enter the housing through the outdoor air inlet and exchange heat with the outdoor heat exchanger 21. The outdoor air after heat exchange flows out of the housing through the outdoor air outlet.

[0104] Outdoor unit 2 may include compressor 22.

[0105] The compressor 22 is located in the outdoor unit casing. The compressor 22 is used to compress the refrigerant gas from a low-temperature, low-pressure state into a high-temperature, high-pressure state, and then discharge the compressed refrigerant gas to the condenser. The compressor 22 can be a variable frequency compressor 22.

[0106] The fresh air conditioner 20 may include a throttling device 3. The throttling device 3 is used for throttling. The throttling device 3 may be installed in the indoor unit 1 or the outdoor unit 2.

[0107] The fresh air conditioner 20 may include a four-way valve. The four-way valve is installed in the outdoor unit 2 to change the flow direction of the refrigerant in the refrigerant circuit 4.

[0108] The energy-saving system for computer room air conditioning may include exhaust fans 40.

[0109] The exhaust fan 40 can be installed on the wall of the computer room. Alternatively, the exhaust fan 40 can be located on the ceiling of the computer room to better exhaust hot air from inside the computer room to the outside.

[0110] The exhaust fan 40 may include an air inlet, which is connected to the interior of the machine room.

[0111] The exhaust fan 40 may include an exhaust vent that is connected to the outside of the computer room. When the exhaust fan 40 is working, it can exhaust the airflow inside the computer room to the outdoor environment.

[0112] It is understandable that the maximum input power of the exhaust fan 40 is much smaller than the maximum input power of the computer room air conditioner 10. In this embodiment, an exhaust fan 40 with a maximum input power of about 0.5KW is selected.

[0113] In some embodiments of this application, the data center air conditioning energy-saving system may include a controller 30. The controller 30 is electrically connected to the data center air conditioner 10, the fresh air conditioner 20, and the exhaust fan 40 to control the operation of each component, so that the various components of the data center air conditioning energy-saving system can perform their predetermined functions.

[0114] refer to Figure 2 The controller 30 is electrically connected to at least the compressor 22, the throttling device 3, the fresh air unit 12, and the outdoor fan in the fresh air conditioner 20.

[0115] In the embodiments shown in this application, controller 30 refers to a device that can generate operation control signals based on instruction operation codes and timing signals to instruct the air conditioner to execute control commands. For example, in response to a power-on or power-off command issued by a user, controller 30 can perform an operation related to the object selected by the power-on or power-off command.

[0116] The fresh air conditioner 20 may include an outdoor temperature sensor, which is used to detect the outdoor ambient temperature.

[0117] The outdoor temperature sensor has a communication connection with the controller 30, enabling the outdoor temperature sensor to transmit data information to the controller 30. The outdoor temperature sensor can transmit the detected outdoor ambient temperature to the controller 30.

[0118] In this embodiment, the outdoor temperature sensor can be installed at the fresh air inlet 14.

[0119] In some embodiments of this application, the indoor temperature is set to t. Where t ≤ 29℃ and t ≥ 17℃.

[0120] The indoor set temperature should not be too low. Excessive low temperatures can cause condensation in the air inside the equipment room, forming water droplets and increasing the risk of short circuits and corrosion within the communication equipment. It also increases cooling energy consumption, hindering cost reduction. To effectively protect the performance and lifespan of the communication equipment, the indoor set temperature t should be set to no less than a first parameter value. This first parameter value can be between 17℃ and 20℃. A suitable specific parameter should be selected during the design process. For example, the first parameter value could be 17℃.

[0121] The indoor set temperature should not be too high, as this will cause the communication equipment to overheat, reducing its performance and efficiency, accelerating the aging of electronic components, and increasing the failure rate. To improve the lifespan of the communication equipment, the indoor set temperature t should be set no higher than the second parameter value. The second parameter value can be between 27℃ and 29℃. A suitable specific parameter should be selected during the design process. For example, the second parameter value could be 29℃.

[0122] The difference between the indoor set temperature and the outdoor ambient temperature is defined as the indoor-outdoor temperature difference, i.e., t - t1 = t2. Where t1 is the outdoor ambient temperature and t2 is the indoor-outdoor temperature difference.

[0123] The energy-saving air conditioning system for the computer room provided in this embodiment can turn off the computer room air conditioner 10 and turn on the fresh air conditioner 20 when the ambient temperature outside the computer room reaches a certain low temperature. It can draw in low-temperature outdoor fresh air from outside the computer room. In different low temperature ranges, the fresh air conditioner 20 can be turned on in either the air supply mode or the cooling mode, and the exhaust fan 40 can be turned on in different combinations to achieve energy-saving cooling of the computer room using outdoor fresh air.

[0124] Specifically, controller 30 is configured as follows:

[0125] If the outdoor ambient temperature is not higher than the indoor set temperature, and the indoor and outdoor temperature difference reaches the temperature difference threshold, the fresh air unit 12 and exhaust fan 40 will be turned on. At this time, the cooling capacity required in the computer room will be provided entirely by the outdoor fresh air.

[0126] If the outdoor ambient temperature is not higher than the indoor set temperature and the indoor-outdoor temperature difference is lower than the temperature difference threshold, the compressor 22 is turned on, and the fresh air fan 12 and exhaust fan 40 are turned on at the same time. At this time, the outdoor fresh air enters the indoor unit 1 through the fresh air inlet 14, is cooled, and is blown out through the air outlet 15 for heat dissipation in the computer room.

[0127] If the outdoor ambient temperature is higher than the indoor set temperature, the computer room air conditioner 10 will be controlled to operate in cooling mode, and the fresh air unit 12, exhaust fan 40 and compressor 22 will stop running and not be turned on. At this time, the cooling capacity required in the computer room will be provided only by the computer room air conditioner 10.

[0128] For details, please refer to Figure 8After the fresh air conditioner 20 is turned on, it first performs step S1: detect the outdoor ambient temperature; after performing step S1, it performs step S2: determine whether the outdoor ambient temperature t1 is less than or equal to the indoor set temperature t, that is, t1≤t is the judgment condition.

[0129] After completing step S2, if so, determine whether the indoor and outdoor temperature difference has reached the temperature difference threshold. If t2≥Δt, then execute step S21: control the fresh air unit 12 and the exhaust fan 40 to start, and the compressor 22 to stop.

[0130] After completing step S2, if the indoor and outdoor temperature difference is lower than the temperature difference threshold, if t2 < Δt, then execute step S22: control the compressor 22 to start, and simultaneously control the fresh air unit 12 and the exhaust fan 40 to start.

[0131] If not after completing step S2, proceed to step S3: Control the computer room air conditioner 10 to operate in cooling mode.

[0132] The configuration of the controller 30 enables the data center air conditioning energy-saving system to have three working modes: fresh air cooling mode, fresh air air conditioning 20 cooling mode, and full data center air conditioning 10 cooling mode.

[0133] In the all-fresh-air cooling mode, the fresh air unit 12 and exhaust fan 40 are turned on, while the compressor 22 and the server room air conditioner 10 are not turned on. All the heat required inside the server room is provided by outdoor fresh air. Cooling the server room solely with outdoor fresh air achieves the best energy-saving effect.

[0134] In the cooling mode of the fresh air conditioner 20, the fresh air unit 12, the exhaust fan 40, and the compressor 22 are turned on, while the computer room air conditioner 10 is not turned on. In this mode, the compressor 22 of the fresh air conditioner 20 is further turned on, and the indoor heat exchanger 11 is used for cooling. The outdoor fresh air is cooled and then sent into the computer room, increasing the cooling capacity to meet the purpose of cooling the computer room. This mode effectively reduces the operating time and energy consumption of the computer room air conditioner 10 and reduces costs. Compared with the existing technology of mixing cooling of the computer room air conditioner 10 with outdoor fresh air, its energy-saving effect is better.

[0135] In the cooling mode of the entire computer room air conditioner 10, the fresh air unit 20 and the exhaust fan are no longer sufficient to cool the computer room. At this time, the computer room air conditioner 10 is turned on and set to cooling operation, while the fresh air unit 12, exhaust fan 40, and compressor 22 are not turned on. All the heat required inside the computer room is provided by the computer room air conditioner 10. In this mode, the fresh air unit 12 and exhaust fan 40 are no longer turned on, and cooling is achieved solely by the computer room air conditioner 10, resulting in no energy savings.

[0136] The data center air conditioning energy-saving system provided in this embodiment uses a fresh air conditioner 20 to introduce fresh outdoor air into the data center. When the outdoor ambient temperature is low, it achieves the cooling effect in the data center in an energy-saving manner based on the temperature difference between indoor and outdoor environments, resulting in good energy-saving and emission-reduction effects.

[0137] Furthermore, in some embodiments of this application, the controller 30 is also configured to control the exhaust fan 40 to be linked with the fresh air fan 12 so as to balance the exhaust volume and the fresh air volume. The start-up of the exhaust fan 40 is conditional upon the start-up of the fresh air fan 12.

[0138] In this embodiment, the exhaust fan 40 and the fresh air unit 12 are configured for coordinated control, ensuring that the exhaust volume and fresh air volume are consistent, thus maintaining a balanced indoor airflow and avoiding localized overheating or overcooling caused by uneven airflow. Balanced fresh air and exhaust air help to more effectively remove indoor heat while avoiding unnecessary over-ventilation, thereby reducing energy waste.

[0139] In some embodiments of this application, the start-up of the exhaust fan 40 may be conditional upon the start-up of the fresh air unit 12. In this embodiment, the fresh air unit 12 and the exhaust fan 40 are turned on or off simultaneously to ensure a balance in indoor and outdoor air exchange and prevent negative or positive pressure problems.

[0140] In some embodiments of this application, the controller 30 is further configured to adjust the fan speed of the fresh air unit 12 according to the indoor-outdoor temperature difference. The fresh air unit 12 and the exhaust fan 40 may have multiple fan speed settings.

[0141] By automatically adjusting the airflow speed of the fresh air unit 12 according to the temperature difference between indoors and outdoors, it can not only maintain a more stable indoor environment and improve comfort, but also reduce unnecessary airflow speed, reduce energy consumption, and save operating costs.

[0142] Specifically, in this embodiment, adjusting the fan speed of the fresh air unit 12 according to the indoor-outdoor temperature difference includes:

[0143] When the outdoor ambient temperature is not higher than the indoor set temperature, the allowable value of the indoor-outdoor temperature difference is divided into multiple preset intervals, and each preset interval corresponds to a different wind speed level; wherein, as the preset interval increases, the wind speed level decreases.

[0144] Based on the preset range of indoor and outdoor temperature difference and the correspondence between the preset range and the wind speed level, the fresh air unit 12 is controlled to work at the corresponding wind speed level.

[0145] In this embodiment, the higher the temperature difference between indoors and outdoors, the higher the corresponding fan speed setting of the fresh air unit 12. That is, under conditions of a large temperature difference between indoors and outdoors, increasing the fresh air fan speed can more effectively utilize external cold air, improve the cooling effect, and keep the computer room within a more suitable temperature range. When the outdoor ambient temperature is close to the indoor set temperature, reducing the fan speed setting can reduce the energy consumption of the fresh air unit 12, thereby saving energy.

[0146] It is understandable that the permissible range for the indoor-outdoor temperature difference is 0 to Tmax, which includes Tmax. Tmax represents the indoor-outdoor temperature difference corresponding to the lowest achievable outdoor ambient temperature.

[0147] In this embodiment, both the fresh air unit 12 and the exhaust fan 40 have three wind speed settings: low, medium, and high. Three preset intervals are also provided, namely the first preset interval, the second preset interval, and the third preset interval.

[0148] In this system, any value within the first preset interval is greater than any value within the second preset interval, and any value within the second preset interval is greater than any value within the third preset interval. The first, second, and third preset intervals correspond to the low, medium, and high wind speed settings of the fresh air unit 12, respectively. By controlling the wind speed of the fresh air unit 12 differently within each preset interval, it can dynamically adapt to changes in the outdoor environment, optimizing heat dissipation and equipment protection in the computer room.

[0149] In this embodiment, the allowable range of indoor and outdoor temperature difference is divided into a third preset interval, a second preset interval, and a first preset interval by using a first threshold T1 and a third threshold T2, which are respectively: [0, T1], (T1, T2], and (T2, Tmax).

[0150] For example, Tmax is 30℃, so the allowable range of indoor and outdoor temperature difference is 0℃~30℃. Among them, the first threshold T1 is 10℃, the first threshold T2 is 10℃, so the third preset interval, the second preset interval and the first preset interval are respectively: [0, 10℃], (10℃, 20℃], (20℃, 30℃).

[0151] When the indoor and outdoor temperature difference t2 is within the third preset range, that is, when t2≤10℃, the fresh air unit 12 operates at a high wind speed, that is, its automatic wind speed is high, and at the same time the exhaust fan 40 operates at a high wind speed.

[0152] When the indoor and outdoor temperature difference t2 is within the second preset range, that is, when t2 > 10℃ and t2 ≤ 20℃, the fresh air unit 12 operates at the medium wind speed setting, that is, its automatic wind speed is medium, and at the same time the exhaust fan 40 operates at the medium wind speed setting.

[0153] When the indoor and outdoor temperature difference t2 is within the first preset range, that is, when t2 > 20℃, the fresh air unit 12 operates at a low wind speed, that is, its automatic wind speed is low, and at the same time the exhaust fan 40 operates at a low wind speed.

[0154] In this embodiment, the high, medium, and low fan speed settings of the fresh air unit 12 correspond to a fresh air volume of 2000m³ / h. 3 / h, 1500m 3 / h、900m 3 / h.

[0155] Of course, in some other embodiments, the fresh air volume corresponding to the high, medium and low wind speed settings of the fresh air unit 12 can be other values. The air volume of the fresh air unit 12 can be reasonably selected according to the area of ​​the communication equipment room and the capacity of the internal communication equipment.

[0156] Table 1. Correspondence between different indoor and outdoor temperature differences and cooling capacity.

[0157]

[0158]

[0159] In some embodiments of this application, the controller 30 is configured to calculate a temperature difference threshold based on the upper limit of the heat generation of the communication equipment inside the computer room and its corresponding cooling demand. The temperature difference threshold can be a positive integer.

[0160] In this embodiment, the temperature difference threshold is calculated based on the required cooling capacity corresponding to the upper limit of the heat generation, and the operation mode of the fresh air conditioner 20 is ensured according to the temperature difference threshold so that the indoor and outdoor temperature difference reaches above the temperature difference threshold. Only the fresh air unit 12 needs to be turned on to completely offset the heat generation in the computer room without turning on the compressor 22, resulting in the best energy saving effect.

[0161] Specifically, the upper limit of heat generation of communication equipment in the computer room is calculated based on the product of its operating voltage and its maximum input current. In reality, the heat generation of communication equipment in the computer room is less than the upper limit of heat generation of the communication equipment.

[0162] To ensure that the cooling output from the outdoor fresh air supply offsets the heat generated inside the server room, the required cooling capacity should exceed the upper limit of the heat generation. Based on the upper limit of the heat generation and its corresponding cooling capacity requirement, the temperature difference threshold can be calculated according to the cooling capacity calculation logic of air handling.

[0163] In this embodiment, the operating voltage of the communication equipment in the computer room is DC53.5V, and its maximum input current is 100A. Therefore, the upper limit of heat generation is: 53.5V * 100A = 5350W (the actual heat generation is less than this value).

[0164] The formula for calculating cooling capacity is: Q = c * ρ * V * Δt. Where c is the specific heat capacity of air, ρ is the air density, V is the fresh air volume, and Δt is the indoor-outdoor temperature difference.

[0165] In this embodiment, the indoor temperature is set to 25°C. At this temperature, the specific heat capacity of air is c = 1012 J / (kg·°C), and the air density is ρ = 1.2 kg / m³. 3 V is the maximum fresh air volume, V = 2000m³ 3 / h=2000 / 3600m 3 / s≈0.556m 3 / s.

[0166] The temperature difference threshold Δt = Q / c * ρ * V = (5350 / 1.2 * 1012 * 0.556)℃ ≈ 7.92℃. This temperature difference threshold Δt is the critical temperature difference at which the compressor 22 of the fresh air conditioner 20 is turned on or off. When the indoor and outdoor temperature difference reaches or exceeds the temperature difference threshold, the temperature inside the machine room can be controlled solely by outdoor fresh air, resulting in optimal energy saving.

[0167] When the temperature difference between indoors and outdoors is lower than the temperature difference threshold Δt, the corresponding cooling capacity is less than the upper limit of the heat generation value mentioned above. At this time, the cooling capacity provided by the outdoor fresh air is insufficient to offset the upper limit of the heat generation value. In order to increase the cooling capacity to meet the cooling demand in the computer room, it is necessary to further turn on the compressor 22 on the basis of turning on the fresh air unit 12.

[0168] Of course, in some other embodiments, the temperature difference threshold Δt can be calculated based on the actual heat of the communication device and its corresponding cooling capacity.

[0169] When the outdoor ambient temperature is higher than the indoor set temperature, the outdoor fresh air cannot bring cooling. At this time, the computer room air conditioner 10 is turned on to dissipate heat in the computer room.

[0170] In this embodiment, the temperature difference threshold Δt is taken as an integer of 8°C, the indoor set temperature is 25°C, and the indoor-outdoor temperature difference is taken as a positive integer. That is, when the outdoor ambient temperature reaches below 17°C, the data center air conditioning energy-saving system operates in 100% fresh air cooling mode; when the outdoor ambient temperature exceeds 17°C but reaches below 25°C, the data center air conditioning energy-saving system operates in 20% fresh air cooling mode; when the outdoor ambient temperature exceeds the indoor set temperature, the data center air conditioning energy-saving system operates in 10% full data center cooling mode.

[0171] Considering that the 5350W input power of the communication equipment in the computer room cannot be entirely converted into heat, through on-site installation tests in the computer room, when the outdoor ambient temperature is no higher than the indoor set temperature, the compressor 22 can be started when the outdoor ambient temperature reaches 20℃ or above, thus achieving the energy-saving effect.

[0172] In some embodiments of this application, the data center air conditioning energy-saving system may include an indoor temperature sensor, which is used to detect the temperature inside the data center and is defined as the indoor ambient temperature.

[0173] The indoor temperature sensor is electrically connected to the controller 30 so that the indoor temperature sensor can transmit data information to the controller 30.

[0174] The data center air conditioning energy-saving system may include an outdoor humidity sensor. The outdoor humidity sensor is located at the fresh air inlet 14 to detect the outdoor ambient humidity. The outdoor humidity sensor is electrically connected to the controller 30, enabling it to transmit the detected outdoor ambient humidity data to the controller 30.

[0175] The data center air conditioning energy-saving system may include an indoor humidity sensor. The indoor humidity sensor is used to detect the outdoor ambient humidity. Specifically, the indoor humidity sensor is electrically connected to the controller 30, so that the indoor humidity sensor transmits the detected indoor ambient humidity to the controller 30.

[0176] Based on the indoor temperature sensor and the outdoor humidity sensor, the controller 30 is also configured to:

[0177] If the outdoor humidity is not greater than the indoor set humidity and the indoor temperature is not greater than the indoor set temperature, the fresh air unit 12 and the exhaust fan 40 will be turned on, while the compressor 22 will not be turned on.

[0178] If the outdoor humidity exceeds the indoor humidity setting or the indoor temperature exceeds the indoor temperature setting, the compressor 22 will be turned on, and the fresh air unit 12 and the exhaust fan 40 will be turned on at the same time.

[0179] In this embodiment, the operating status of compressor 22 and fresh air unit 12 is controlled by detecting the indoor ambient temperature and outdoor ambient humidity, which can better meet the control requirements of the computer room environment.

[0180] Specifically, when the outdoor humidity is low and the indoor temperature is not higher than the set indoor temperature, the outdoor air humidity is moderate, and fresh outdoor air can be directly introduced into the room, saving energy and cooling the temperature without significantly increasing the indoor humidity.

[0181] If the outdoor humidity exceeds the indoor humidity setting or the indoor temperature exceeds the indoor temperature setting, the compressor 22 will be activated, and the cooling function of the fresh air conditioner 20 will be used to adjust the humidity and temperature inside the computer room. By activating the compressor 22, the temperature of the outdoor fresh air can be reduced, thus achieving dehumidification.

[0182] During the operation of the fresh air conditioner 20, the moisture in the outdoor environment is completely transported into the machine room. In this embodiment, the operating status of the fresh air conditioner 20 can be controlled according to the detected outdoor humidity and indoor temperature, specifically including:

[0183] refer to Figure 9 , Figure 11 Execute step S10: detect the indoor ambient temperature; after executing step S10, execute step S101: determine whether the indoor ambient temperature t3 is less than or equal to the indoor set temperature t.

[0184] After completing step S101, if yes, then detect the outdoor ambient humidity (step S102) and determine whether the outdoor ambient humidity %RH is less than or equal to the indoor set humidity %RH1 (step S103). After completing step S103, if yes, then execute step S21: control the fresh air unit 12 and the exhaust fan 40 to start, and the compressor 22 to stop; if no, then execute step S22: control the compressor 22 to start, and simultaneously control the fresh air unit 12 and the exhaust fan 40 to start.

[0185] If not after step S101 is completed, then step S22 is executed: control the compressor 22 to start, and at the same time control the fresh air fan 12 and the exhaust fan 40 to start.

[0186] In some embodiments of this application, the controller 30 is also configured to control the fresh air conditioner 20 to shut down when the detected indoor ambient temperature reaches the indoor set temperature.

[0187] Specifically, reference Figure 10 , Figure 11 After executing steps S21, S22, and S32, execute step S10: detect the indoor ambient temperature and determine whether the detected indoor ambient temperature t3 has reached the indoor set temperature t, i.e., whether the temperature has been reached (step S20). If yes, execute step S30 to control the fresh air conditioner 20 to turn off. If no, step S1 can be repeated.

[0188] In some embodiments of this application, according to embodiments of this disclosure, the controller 30 is further configured to:

[0189] Obtain the cumulative operating time of the fresh air unit 12;

[0190] When the cumulative running time reaches or exceeds the running time threshold, the fresh air conditioner 20 is controlled to operate in self-cleaning mode.

[0191] In this embodiment, when the fresh air conditioner 20 operates in self-cleaning mode, it can self-clean the indoor heat exchanger 11, effectively cleaning the dust on the indoor heat exchanger 11.

[0192] The energy-saving air conditioning system for computer rooms provided in this embodiment reduces the operating time of the computer room air conditioner 10 by making full use of the temperature difference between the indoor set temperature and the outdoor ambient temperature. This achieves energy saving and cooling while extending the service life of the computer room air conditioner 10, reducing maintenance costs, thereby reducing costs and improving energy utilization.

[0193] This computer room air conditioning energy-saving system is suitable for various computer rooms that require air conditioning and cooling as well as fresh air all year round, such as program-controlled data centers, computing data centers, network data centers, battery rooms, laboratories, etc., especially in winter and the transitional spring and autumn seasons to supplement fresh air and cool the computer room environment.

[0194] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0195] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A data center air conditioning energy-saving system, characterized in that, include: Computer room air conditioning; An exhaust fan, the air inlet of which is connected to the interior of the machine room, and the air outlet of which is connected to the exterior of the machine room; Fresh air conditioning unit, the fresh air conditioning unit includes: An indoor unit, installed inside the computer room, includes a fresh air unit, an indoor heat exchanger, a fresh air inlet communicating with the outdoor environment, and an air outlet communicating with the interior of the computer room. The fresh air unit is used to introduce fresh outdoor air into the computer room. The outdoor unit, which includes a compressor and an outdoor heat exchanger; In the refrigerant circuit of the fresh air conditioner, the refrigerant circulates sequentially through the compressor, condenser, throttling device, and evaporator; one of the condenser and the evaporator is the outdoor heat exchanger, and the other is the indoor heat exchanger. The data center energy-saving system also includes: An outdoor temperature sensor is used to detect the outdoor ambient temperature, and the difference between the indoor set temperature and the outdoor ambient temperature is defined as the indoor-outdoor temperature difference; The controller is connected at least to the fresh air conditioner, the computer room air conditioner, and the exhaust fan, and the controller is configured to: If the outdoor ambient temperature is not greater than the indoor set temperature, and the indoor-outdoor temperature difference reaches or exceeds the temperature difference threshold, the fresh air fan and the exhaust fan will be turned on. At this time, the cooling capacity required in the computer room will be entirely provided by the outdoor fresh air. If the outdoor ambient temperature is not greater than the indoor set temperature and the indoor-outdoor temperature difference is lower than the temperature difference threshold, the compressor is controlled to start, and the fresh air fan and the exhaust fan are also controlled to start. At this time, the outdoor fresh air enters the indoor unit through the fresh air inlet, is cooled, and is blown out through the air outlet for heat dissipation in the computer room. If the outdoor ambient temperature is higher than the indoor set temperature, the computer room air conditioner is controlled to operate in cooling mode, and the fresh air unit, the exhaust fan and the compressor stop running. At this time, the cooling capacity required in the computer room is provided only by the computer room air conditioner.

2. The energy-saving system for computer room air conditioning according to claim 1, characterized in that, The controller is further configured to control the exhaust fan and the fresh air fan to be linked together so that the exhaust volume and the fresh air volume are balanced; wherein the start of the exhaust fan is conditional upon the start of the fresh air fan.

3. The energy-saving system for computer room air conditioning according to claim 1 or 2, characterized in that, The controller is also configured to adjust the fan speed of the fresh air unit according to the indoor-outdoor temperature difference.

4. The energy-saving system for computer room air conditioning according to claim 3, characterized in that, The fresh air unit has multiple fan speed settings, and the fan speed settings are adjusted according to the indoor and outdoor temperature difference, including: When the outdoor ambient temperature is not greater than the indoor set temperature, the allowable value of the indoor-outdoor temperature difference is divided into multiple preset intervals, and each of the multiple preset intervals corresponds to a different wind speed level; wherein, as the preset interval increases, the wind speed level decreases. Based on the preset range of the indoor and outdoor temperature difference and the correspondence between the preset range and the wind speed level, the fresh air unit is controlled to operate at the corresponding wind speed level.

5. The energy-saving system for computer room air conditioning according to any one of claims 1 to 4, characterized in that, The controller is configured to calculate the temperature difference threshold based on the upper limit of the heat generation of the communication equipment in the computer room and its corresponding cooling demand.

6. The energy-saving system for computer room air conditioning according to claim 1, characterized in that, Also includes: An indoor temperature sensor is used to detect the temperature inside the computer room, and this temperature is defined as the indoor ambient temperature. An outdoor humidity sensor is installed at the fresh air inlet to detect the outdoor ambient humidity. The controller is also configured to: If the outdoor ambient humidity is not greater than the indoor set humidity and the indoor ambient temperature is not greater than the indoor set temperature, the fresh air unit and the exhaust fan are turned on, and the compressor is not turned on. If the outdoor humidity exceeds the indoor set humidity or the indoor temperature is greater than the indoor set temperature, the compressor is controlled to start, and the fresh air fan and the exhaust fan are also controlled to start.

7. The energy-saving system for computer room air conditioning according to claim 6, characterized in that, The controller is also configured to control the fresh air conditioner to shut down when the detected indoor ambient temperature reaches the indoor set temperature.

8. The energy-saving system for computer room air conditioning according to claim 1, characterized in that, The controller is also configured to, Obtain the cumulative operating time of the fresh air unit; When the cumulative runtime reaches or exceeds the runtime threshold, the fresh air conditioner is controlled to operate in self-cleaning mode.

9. The energy-saving system for computer room air conditioning according to claim 1, characterized in that, The indoor unit is mounted on the floor of the computer room, and the air outlet is oriented away from the ground.

10. A data center air conditioning energy-saving system, characterized in that, include: Computer room air conditioning; An exhaust fan, the air inlet of which is connected to the interior of the machine room, and the air outlet of which is connected to the exterior of the machine room; Fresh air conditioning unit, the fresh air conditioning unit includes: An indoor unit, installed outside the computer room, includes a fresh air unit, an indoor heat exchanger, a fresh air inlet communicating with the outdoor environment, and an air outlet communicating with the interior of the computer room. The fresh air unit is used to introduce fresh outdoor air into the computer room. The outdoor unit, which includes a compressor and an outdoor heat exchanger; In the refrigerant circuit of the fresh air conditioner, the refrigerant circulates sequentially through the compressor, condenser, throttling device, and evaporator; one of the condenser and the evaporator is the outdoor heat exchanger, and the other is the indoor heat exchanger. The data center energy-saving system also includes: An outdoor temperature sensor is used to detect the outdoor ambient temperature, and the difference between the indoor set temperature and the outdoor ambient temperature is defined as the indoor-outdoor temperature difference; The controller is connected at least to the fresh air conditioner, the computer room air conditioner, and the exhaust fan, and the controller is configured to: If the outdoor ambient temperature is not greater than the indoor set temperature, and the indoor-outdoor temperature difference reaches or exceeds the temperature difference threshold, the fresh air fan and the exhaust fan will be turned on. At this time, the cooling capacity required in the computer room will be entirely provided by the outdoor fresh air. If the outdoor ambient temperature is not greater than the indoor set temperature and the indoor-outdoor temperature difference is lower than the temperature difference threshold, the compressor is controlled to start, and the fresh air fan and the exhaust fan are also controlled to start. At this time, the outdoor fresh air enters the indoor unit through the fresh air inlet, is cooled, and is blown out through the air outlet for heat dissipation in the computer room. If the outdoor ambient temperature is higher than the indoor set temperature, the computer room air conditioner is controlled to operate in cooling mode, and the fresh air unit, the exhaust fan and the compressor stop running. At this time, the cooling capacity required in the computer room is provided only by the computer room air conditioner.

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