Indirect evaporative cooling unit, control method and storage medium

Abstract

The present application provides an indirect evaporative cooling unit, a control method and a storage medium. The indirect evaporative cooling unit includes an indirect evaporative cooling mechanism, a bypass ventilation valve group, a detection mechanism and a control mechanism. The indirect evaporative cooling mechanism includes an outdoor fan and a heat exchange core whose air outlet is arranged close to the outdoor fan; the bypass ventilation valve group is arranged close to the air outlet and / or air inlet of the heat exchange core; the detection mechanism is used to obtain environmental information; the control mechanism is connected to the outdoor fan, the bypass ventilation valve group and the detection mechanism, and is used to control the opening and closing of the bypass ventilation valve group and the outdoor fan based on the environmental information, so as to adjust the air duct flow direction of the indirect evaporative cooling unit, and then adjust the working mode of the indirect evaporative cooling unit. The indirect evaporative cooling unit proposed in the present application can work in different working modes, reduce the energy consumption of the indirect evaporative cooling unit, and improve its energy efficiency.

Description

Technical Field

[0001] The present application relates to data center air conditioning control technology, and in particular to an indirect evaporative cooling unit, control method, system and storage medium. Background Art

[0002] Existing data center cooling technologies consume a high amount of cooling energy, accounting for approximately 30% of total data center cooling energy consumption. Indirect evaporative cooling technology has been widely used in the industry because it primarily utilizes dry air for cooling, achieving highly energy-efficient cooling in data centers.

[0003] The energy efficiency of existing indirect evaporation units using indirect evaporative cooling technology is low. Summary of the Invention

[0004] The present application provides an indirect evaporative cooling unit, a control method and a storage medium to solve the technical problem of low energy efficiency of indirect evaporative cooling units in the prior art.

[0005] To solve the above technical problems, the present application adopts a technical solution: an indirect evaporative cooling unit includes an indirect evaporative cooling mechanism, a bypass ventilation valve group, a detection mechanism, and a control mechanism. The indirect evaporative cooling mechanism includes an outdoor fan and a heat exchange core with an air outlet arranged near the outdoor fan; the bypass ventilation valve group is arranged near the air outlet and / or air inlet of the heat exchange core; the detection mechanism is used to obtain environmental information; and the control mechanism is connected to the outdoor fan, the bypass ventilation valve group, and the detection mechanism, and is used to control the opening and closing of the bypass ventilation valve group and the outdoor fan based on the environmental information, so as to adjust the air duct flow direction of the indirect evaporative cooling unit and thereby adjust the operating mode of the indirect evaporative cooling unit.

[0006] In order to solve the above technical problems, another technical solution adopted in this application is: to provide an indirect evaporative cooling unit control method, which is used for the above-mentioned indirect evaporative cooling unit; the control method includes a control mechanism controlling a detection mechanism to obtain environmental information; the control mechanism controls the opening and closing of the bypass ventilation valve group and the outdoor fan based on the environmental information to adjust the air duct flow direction of the indirect evaporative cooling unit, and then adjust the working mode of the indirect evaporative cooling unit.

[0007] In order to solve the above technical problems, another technical solution adopted in the present application is: providing a storage medium, the storage medium storing a computer program, and the computer program can be executed by a processor to implement the above indirect evaporative cooling unit control method.

[0008] The beneficial effects of the present application are as follows: an indirect evaporative cooling unit is provided with an indirect evaporative cooling mechanism including an outdoor fan and a heat exchange core, and a bypass air valve group is provided near the air outlet and / or air inlet of the heat exchange core, a detection mechanism for detecting environmental information, and a control mechanism connected to the outdoor fan, the bypass air valve group and the detection mechanism. Through the above-mentioned setting method, the indirect evaporative cooling unit controls the detection mechanism through the control mechanism to obtain environmental information, and controls the opening and closing of the bypass air valve group and the outdoor fan based on the environmental information, thereby changing the flow direction of the outdoor intake air and / or indoor return air at the air outlet and / or air inlet of the heat exchange core in the indirect evaporative cooling unit, thereby adjusting the air duct flow direction of the indirect evaporative cooling unit, and then adjusting the working mode of the indirect evaporative cooling unit; further, adjusting the air duct flow direction of the indirect evaporative cooling unit can reduce the opening of the outdoor fan or reduce the working speed of the outdoor fan, which can reduce the energy consumption of the indirect evaporative cooling unit, thereby improving the energy efficiency of the indirect evaporative cooling unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0010] Figure 1 This is a structural diagram of an embodiment of an indirect evaporative cooling unit provided by the present application;

[0011] Figure 2 This is a flow chart of an embodiment of the indirect evaporative cooling unit control method provided by the present application;

[0012] Figure 3 yes Figure 2 A flow chart of step S120 of an embodiment of an indirect evaporative cooling unit control method;

[0013] Figure 4 yes Figure 2 A flow chart of step S120 of another embodiment of the indirect evaporative cooling unit control method;

[0014] Figure 5 yes Figure 2 A flow chart of step S120 of another embodiment of the indirect evaporative cooling unit control method;

[0015] Figure 6 It is a structural diagram of an embodiment of the storage medium provided by this application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0017] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0018] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0019] See Figure 1 , Figure 1 This is a structural diagram of an embodiment of the indirect evaporative cooling unit provided by this application. Figure 1As shown, the indirect evaporative cooling unit 10 includes an indirect evaporative cooling mechanism 110, a detection mechanism (not marked in the figure), a bypass air valve group 120 and a control mechanism (not marked in the figure). The indirect evaporative cooling mechanism 110 includes an outdoor side fan 112 and a heat exchange core 111. Among them, the air outlet of the heat exchange core 111 is arranged close to the outdoor side fan 112. The heat exchange core 111 is mainly composed of a first air duct and a second air duct. The first air duct and the second air duct are respectively provided with an air inlet and an air outlet that can be connected to the outside world or the internal air duct of the unit. Outdoor fresh air and indoor return air can flow through the two groups of air ducts of the heat exchange core 111 as cold and hot fluids respectively. The heat exchange core 111 can exchange heat with the outdoor fresh air and the indoor return air, and the outdoor fresh air can also exchange heat with the indoor return air. The air outlet of the heat exchange core 111 is arranged near the outdoor fan 112. When the outdoor fan 112 is turned on, the circulation speed of the gas in the heat exchange core 111 can be increased. In addition, adjusting the rotation speed of the outdoor fan 112 can also adjust the circulation speed of the gas in the heat exchange core 111. When the outdoor fan 112 is turned off, the energy consumption of the indirect evaporative cooling unit can be reduced, thereby improving the energy efficiency of the indirect evaporative cooling unit. The bypass air valve group 120 is arranged near the air outlet and / or air inlet of the heat exchange core 111. By controlling the opening and closing of the bypass air valve group 120, the flow direction of the outdoor intake air and / or indoor return air at the air outlet and / or air inlet of the heat exchange core 111 in the indirect evaporative cooling unit can be changed, that is, the air duct flow direction of the indirect evaporative cooling unit can be adjusted.

[0020] The detection mechanism is primarily used to obtain environmental information. It can be used to monitor environmental information about the indirect evaporative cooling unit, such as the temperature and humidity of air in different distribution areas within the unit, the temperature and humidity of outdoor air (i.e., fresh air entering the unit), the temperature and humidity of indoor return air, and the unit's supply air temperature and humidity. The detection mechanism may include a sensor assembly for air measurement. Environmental information may include indoor inlet air dry-bulb temperature, indoor inlet air wet-bulb temperature, indoor return air wet-bulb temperature, indoor return air dry-bulb temperature, and supply air temperature.

[0021] The control mechanism is connected to the outdoor fan 112, the bypass ventilation valve group 120 and the detection mechanism, and is used to control the opening and closing of the bypass ventilation valve group 120 and the outdoor fan 112 based on environmental information to adjust the air duct flow direction of the indirect evaporative cooling unit, and then adjust the working mode of the indirect evaporative cooling unit. Among them, the control mechanism may include a processor, and the processor may also be called a CPU (Central Processing Unit). The processor may be an integrated circuit chip with signal processing capabilities. The processor may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component.

[0022] The indirect evaporative cooling unit comprises an indirect evaporative cooling mechanism 110 including an outdoor fan 112 and a heat exchange core 111, a bypass air valve assembly 120 disposed near the air outlet and / or air inlet of the heat exchange core 111, a detection mechanism for detecting environmental information, and a control mechanism connected to the outdoor fan 112, the bypass air valve assembly 120, and the detection mechanism. Through the above-described configuration, the control mechanism controls the detection mechanism to obtain environmental information and, based on the environmental information, controls the opening and closing of the bypass air valve assembly 120 and the outdoor fan 112, thereby changing the flow direction of outdoor inlet air and / or indoor return air from the air outlet and / or air inlet of the heat exchange core 111 within the indirect evaporative cooling unit, thereby adjusting the air duct flow direction of the indirect evaporative cooling unit and, in turn, adjusting the operating mode of the indirect evaporative cooling unit. Furthermore, adjusting the air duct flow direction of the indirect evaporative cooling unit can reduce the number of times the outdoor fan 112 is opened or the operating speed of the outdoor fan 112, thereby reducing the energy consumption of the indirect evaporative cooling unit and improving the energy efficiency of the indirect evaporative cooling unit.

[0023] The indirect evaporative cooling unit can be used in the computer room of a data center. The control mechanism controls the opening and closing of the bypass ventilation valve group 120 and the outdoor fan 112 based on the environmental information inside or outside the computer room. It can adjust the air duct flow direction of the indirect evaporative cooling unit, thereby adjusting the working mode of the indirect evaporative cooling unit and adjusting the air supply temperature of the computer room to ensure the environmental requirements of the computer room of the data center.

[0024] Optionally, the environmental information may include the wet-bulb temperature of the outdoor air inlet to the indirect evaporative cooling unit and the supply air temperature of the indirect evaporative cooling unit. The air outlet of the heat exchange core 111 includes a fresh air outlet and a return air outlet. The fresh air outlet primarily discharges outdoor fresh air that has completed heat exchange within the heat exchange core 111; the return air outlet primarily discharges indoor return air that has completed heat exchange within the heat exchange core 111. In some embodiments, the indirect evaporative cooling mechanism 110 is further provided with an indoor fan 180 near the return air outlet of the heat exchange core 111. Adjusting the speed of the indoor fan 180 adjusts the speed of the indoor return air discharge and the speed of the indirect evaporative cooling unit's supply air.

[0025] The bypass vent valve assembly 120 includes a first bypass vent valve 121, which is disposed between the fresh air outlet and the return air outlet of the heat exchange core 111. When the first bypass vent valve 121 is opened, the fresh air outlet area and the return air outlet area are connected. Opening the first bypass vent valve 121 opens the air duct between the fresh air outlet and the return air outlet of the heat exchange core 111; closing the first bypass vent valve 121 blocks the air duct between the fresh air outlet and the return air outlet of the heat exchange core. The opening and closing of the first bypass vent valve 121 can change the airflow direction of the indirect evaporative cooling unit.

[0026] The indirect evaporative cooling unit also includes a first heat exchanger 130, a second heat exchanger 140 and a compressor 150 connected in sequence by pipelines, and the pipelines are mainly filled with a medium for heat exchange. The first heat exchanger 130 is arranged between the fresh air outlet of the heat exchange core 111 and the outdoor fan 112. The first heat exchanger 130 can be a condenser. The condenser can convert gas or vapor into liquid and transfer the heat in the pipeline to the air near the pipeline in a faster manner. The working process of the condenser is an exothermic process, so the temperature of the condenser is relatively high. When the condenser is working, the outdoor fresh air after heat exchange discharged from the fresh air outlet passes through the condenser, which can take away the heat of the condenser and cool it down. The second heat exchanger 140 is arranged near the return air outlet of the heat exchange core 111 and is connected to the first heat exchanger 130 through a pipeline. The second heat exchanger 140 can be an evaporator. When the evaporator is in operation, it can convert liquid refrigerant into gaseous refrigerant. The gaseous refrigerant then exchanges heat with the surrounding air, absorbing heat through vaporization. The evaporator can then cool the indoor return air discharged from the return air outlet. The compressor 150 is connected to the first heat exchanger 130 and the second heat exchanger 140 via a pipeline. The compressor 150 is a driven fluid machine that raises low-pressure gas to high-pressure gas. It draws low-temperature, low-pressure refrigerant gas from the pipeline, compresses the refrigerant gas through the operation of the motor, and then discharges high-temperature, high-pressure refrigerant gas to provide power for the refrigeration cycle. The compressor 150 can be used to provide a medium for heat exchange between the first heat exchanger 130 and the second heat exchanger 140.

[0027] In response to the outdoor inlet air wet-bulb temperature being greater than the first outdoor inlet air switching temperature threshold and the supply air temperature being greater than or equal to the supply air temperature threshold, the control mechanism controls the first bypass air valve 121 to close and the outdoor fan 112, the first heat exchanger 130, the second heat exchanger 140, and the compressor 150 to operate, so that the indirect evaporative cooling unit operates in the first mode. When the indirect evaporative cooling unit operates in the first mode, outdoor fresh air enters the first air duct of the heat exchange core 111, and indoor return air enters the second air duct of the heat exchange core 111. The heat exchange core 111 cools the indoor return air. Simultaneously, the outdoor fresh air and indoor return air circulate through the first air duct and the second air duct of the heat exchange core 111, respectively, completing heat exchange, thereby adjusting the supply air temperature of the indirect evaporative cooling unit. In response to the outdoor inlet air wet-bulb temperature being greater than the first outdoor inlet air switching temperature threshold and the supply air temperature being greater than or equal to the supply air temperature threshold, the control mechanism controls the first bypass vent valve 121 to close, thereby blocking the air duct between the fresh air outlet and the return air outlet of the heat core, preventing the outdoor fresh air and the indoor fresh air from circulating with each other after heat exchange. This adjusts the unit's air duct flow direction and controls the operation of the outdoor fan 112 to increase the heat exchange rate between the outdoor fresh air and the indoor return air, as well as the rate at which the outdoor fresh air is discharged. The control mechanism controls the operation of the compressor 150, the first heat exchanger 130, and the second heat exchanger 140 to cool the indoor return air discharged from the return air outlet after heat exchange, further adjusting the supply air temperature of the evaporative cooling unit.

[0028] The evaporative cooling unit comprises a first bypass vent valve 121 disposed between the fresh air outlet and the return air outlet of the heat exchange core 111, a first heat exchanger 130 disposed between the fresh air outlet and the outdoor fan 112, a second heat exchanger 140 connected to the first heat exchanger 130 disposed near the return air outlet, and a compressor 150 connected to both the first heat exchanger 130 and the second heat exchanger 140. With the above arrangement, when the outdoor inlet air wet-bulb temperature is greater than the first outdoor inlet air switching temperature threshold and the supply air temperature is greater than or equal to the supply air temperature threshold, the indirect evaporative cooling unit controls the closing of the first bypass vent valve 121 via a control mechanism, thereby preventing the outdoor fresh air and the indoor fresh air from circulating after heat exchange, adjusting the air flow direction of the indirect evaporative cooling unit, and thereby controlling the operation of the outdoor fan 112, the first heat exchanger 130, the second heat exchanger 140, and the compressor 150, further adjusting the supply air temperature of the indirect evaporative cooling unit, and thus adjusting the indirect evaporative cooling unit to operate in the first mode.

[0029] In another embodiment, the indirect evaporative cooling unit further includes an electronic expansion valve 170. The electronic expansion valve 170 is connected to the first heat exchanger 130 and the second heat exchanger 140 via pipelines to adjust the flow of the refrigerant for heat exchange and the refrigerant flowing into the second heat exchanger 140.

[0030] Optionally, the environmental information also includes the dry-bulb temperature of the outdoor air inlet of the indirect evaporative cooling unit. The air inlet of the heat exchange core 111 includes a return air inlet for indoor return air to enter the heat exchange core 111. The bypass ventilation valve group 120 also includes a second bypass ventilation valve 122 and a third bypass ventilation valve 123. The second bypass ventilation valve 122 is arranged between the outdoor fan 112 and the fresh air outlet. When the second bypass ventilation valve 122 is opened, the outdoor fresh air discharged from the fresh air outlet of the heat exchange core 111 can be discharged from the indirect evaporative cooling unit; when the second bypass ventilation valve 122 is closed, the outdoor fresh air discharged from the fresh air outlet of the heat exchange core 111 stays in the indirect evaporative cooling unit, and the opening and closing of the second bypass ventilation valve 122 can adjust the air duct flow direction between the fresh air outlet of the heat exchange core 111 and the outside world. The third bypass ventilation valve 123 is arranged near the return air inlet of the heat exchange core 111. When the third bypass ventilation valve 123 is opened, the indoor return air can be partially discharged from the indirect evaporative cooling unit, and partially enter the heat exchange core 111 through the return air inlet of the heat exchange core 111. At the same time, the outdoor fresh air can enter the area where the return air inlet of the heat exchange core 111 is located through the third bypass ventilation valve 123; when the third bypass ventilation valve 123 is closed, the indoor return air all enters the heat exchange core 111, and the opening and closing of the third bypass ventilation valve 123 can control the flow direction of the air duct between the return air inlet of the heat exchange core 111 and the outdoor air.

[0031] In response to the outdoor inlet air dry-bulb temperature being less than or equal to the second outdoor inlet air switching temperature threshold and the supply air temperature being greater than the supply air temperature threshold, the control mechanism closes the outdoor fan 112 and the second bypass air valve 122, opens the third bypass air valve 123 and the first bypass air valve 121, and operates the first heat exchanger 130, the second heat exchanger 140, and the compressor 150, thereby operating the indirect evaporative cooling unit in the second mode. The second outdoor inlet air switching temperature threshold is less than the first outdoor inlet air switching temperature threshold. When the indirect evaporative cooling unit operates in the second mode, outdoor fresh air enters the first duct of the heat exchange core 111, and indoor return air enters the second duct of the heat exchange core 111. The heat exchange core 111 cools the indoor return air. Simultaneously, the outdoor fresh air and indoor return air circulate through the first and second ducts of the heat exchange core 111, respectively, exchanging heat and thus adjusting the supply air temperature of the indirect evaporative cooling unit. In response to the outdoor inlet dry-bulb temperature being less than or equal to the second outdoor inlet switching temperature threshold and the supply air temperature being greater than the supply air temperature threshold, the control mechanism controls the outdoor fan 112 and the second bypass vent valve 122 to close, adjusting the airflow direction between the fresh air outlet and the outside world so that the outdoor fresh air in the area of ​​the fresh air outlet of the heat exchange core 111 cannot be discharged from the indirect evaporative cooling unit. The control mechanism controls the third bypass vent valve 123 to open, adjusting the airflow direction between the return air inlet of the heat exchange core 111 and the outside world, discharging some of the indoor return air from the indirect evaporative cooling unit and introducing some of the outdoor fresh air into the area of ​​the return air inlet of the heat exchange core 111 to exchange heat with the indoor return air. The control mechanism controls the first heat exchanger 130, the second heat exchanger 140, and the compressor 150 to operate, cooling the indoor return air discharged from the return air outlet after heat exchange. The first bypass ventilation valve 121 is controlled to open, and the air duct between the fresh air outlet and the return air outlet of the heat exchange core 111 is connected, so that the airflow between the area where the fresh air outlet is located and the area where the return air outlet is located is connected, so that the outdoor fresh air that has undergone heat exchange enters the area where the return air outlet is located, and is mixed with the cooled indoor return air, thereby further adjusting the supply air temperature of the indirect evaporative cooling unit.

[0032] The indirect evaporative cooling unit is provided with a second bypass vent valve 122 between the outdoor fan 112 and the fresh air outlet, and a third bypass vent valve 123 near the return air inlet of the heat exchange core 111. With the above-described configuration, in response to the outdoor inlet air dry-bulb temperature being less than or equal to the second outdoor inlet air switching temperature threshold and the supply air temperature being greater than the supply air temperature threshold, the control mechanism controls the outdoor fan 112 and the second bypass vent valve 122 to close, and controls the third bypass vent valve 123 and the first bypass vent valve 121 to open, thereby adjusting the air flow direction within the indirect evaporative cooling unit and controlling the operation of the first heat exchanger 130, the second heat exchanger 140, and the compressor 150 to further adjust the supply air temperature of the indirect evaporative cooling unit so that the indirect evaporative cooling unit operates in the second mode. Furthermore, when the indirect evaporative cooling unit operates in the second mode, the outdoor fan 112 is closed, thereby improving the energy efficiency of the indirect evaporative cooling unit.

[0033] Optionally, the bypass ventilation valve group 120 also includes a fourth bypass ventilation valve 124, which is arranged near the return air inlet of the heat exchange core 111 and is located between the third bypass ventilation valve 123 and the return air inlet of the heat exchange core 111. When the fourth bypass ventilation valve 124 is open, the indoor return air can enter the heat exchange core 111; when the fourth bypass ventilation valve 124 is closed, the indoor return air cannot enter the heat exchange core 111, and the opening and closing of the fourth bypass ventilation valve 124 can adjust the air duct flow direction between the return air inlet of the heat exchange core 111 and the indoor return air. The indirect evaporative cooling unit also includes a spray mechanism 160, which is arranged near the fresh air outlet of the heat exchange core 111. The spray mechanism 160 is mainly used to cool the outdoor fresh air in the first air duct.

[0034] In another embodiment, the spray mechanism 160 is arranged close to the heat exchange core 111. The spray mechanism 160 sprays the coolant onto the outer surface of the heat exchange core 111. The coolant takes away the heat of the heat exchange core 111. The cooled heat exchange core 111 then cools and humidifies the gas in the first air duct and the second air duct, thereby playing a role in cooling and humidifying.

[0035] In response to the outdoor inlet air dry-bulb temperature being greater than the second outdoor inlet air switching temperature threshold, the outdoor inlet air wet-bulb temperature being less than or equal to the first outdoor inlet air switching temperature threshold, and the supply air temperature being greater than the supply air temperature threshold, the control mechanism controls the outdoor fan 112, the second bypass vent valve 122, the first heat exchanger 130, the second heat exchanger 140, the compressor 150, and the fourth bypass vent valve 124 to close, and controls the third bypass vent valve 123, the first bypass vent valve 121, and the spray mechanism 160 to open, so that the indirect evaporative cooling unit operates in the third mode. When the indirect evaporative cooling unit operates in the third mode, the control mechanism controls the outdoor fan 112 and the second bypass vent valve 122 to close in response to the outdoor inlet air dry-bulb temperature being greater than the second outdoor inlet air switching temperature threshold, the outdoor inlet air wet-bulb temperature being less than or equal to the first outdoor inlet air switching temperature threshold, and the supply air temperature being greater than the supply air temperature threshold, so that the outdoor fresh air in the fresh air outlet area of ​​the heat exchange core 111 cannot be discharged from the indirect evaporative cooling unit. The first heat exchanger 130, the second heat exchanger 140, the compressor 150, and the fourth bypass vent valve 124 are controlled to be closed, and the third bypass vent valve 123 is controlled to be opened, so that the indoor return air does not enter the heat exchange core 111 and is directly discharged from the indirect evaporative cooling unit through the third bypass vent valve 123. The spray mechanism 160 and the first bypass vent valve 121 are controlled to be opened so that the spray mechanism 160 cools the outdoor fresh air. The cooled outdoor fresh air passes through the first bypass vent valve 121 and enters the area where the return air outlet of the heat exchange core 111 is located, and serves as the supply air for the indirect evaporative cooling unit.

[0036] The indirect evaporative cooling unit is provided with a fourth bypass ventilation valve 124 between the third bypass ventilation valve 123 and the return air inlet of the heat exchange core 111 , and a spray mechanism 160 is provided near the fresh air outlet of the heat exchange core 111 . Through the above-mentioned setting, the indirect evaporative cooling unit controls the outdoor side fan 112, the second bypass ventilation valve 122, the first heat exchanger 130, the second heat exchanger 140, the compressor 150 and the fourth bypass ventilation valve 124 to be closed, and controls the third bypass ventilation valve 123 to be opened, so as to adjust the air duct flow direction of the indirect evaporative cooling unit, and control the spray mechanism 160 to cool the outdoor fresh air, thereby adjusting the supply air temperature of the indirect evaporative cooling unit; further, when the indirect evaporative cooling unit operates in the third mode, the outdoor side fan 112, the compressor 150, the first heat exchanger 130 and the second heat exchanger 140 are closed, which can improve the energy efficiency of the indirect evaporative cooling unit.

[0037] Optionally, the control mechanism controls the opening ratio of the third bypass vent valve 123 and the fourth bypass vent valve 124 to adjust the supply air temperature. The opening ratio means that the control mechanism can control the third bypass vent valve 123 and the fourth bypass vent valve 124 to be fully open, or to be opened to 30%, 50%, 60%, 80%, etc. Different opening ratios result in different amounts of outdoor fresh air introduced or indoor return air exhausted. However, the amount of air introduced or exhausted by the bypass vent valve is positively correlated with the opening ratio of the bypass vent valve.

[0038] The present application also provides a control method for an indirect evaporative cooling unit, which is used for the above-mentioned indirect evaporative cooling unit. Figure 2 , Figure 2 This is a flow chart of an embodiment of a control method for an indirect evaporative cooling unit provided by the present application. Figure 2 As shown, the method includes:

[0039] Step S110: The control mechanism controls the detection mechanism to obtain environmental information.

[0040] The detection mechanism is primarily used to obtain environmental information. It can be used to monitor environmental information about the indirect evaporative cooling unit, such as the temperature and humidity of air in different distribution areas within the unit, the temperature and humidity of outdoor air (i.e., fresh air entering the unit), the temperature and humidity of indoor return air, and the unit's supply air temperature and humidity. The detection mechanism can include a sensor assembly for air measurement. Environmental information can include indoor inlet air dry-bulb temperature, indoor inlet air wet-bulb temperature, indoor return air wet-bulb temperature, and indoor return air dry-bulb temperature.

[0041] Step S120: The control mechanism controls the opening and closing of the bypass ventilation valve group and the outdoor fan 112 based on the environmental information to adjust the air duct flow direction of the indirect evaporative cooling unit, thereby adjusting the working mode of the indirect evaporative cooling unit.

[0042] Based on the environmental information, the control mechanism controls the opening and closing of the bypass ventilation valve group 120 and the outdoor fan 112, changes the flow direction of the outdoor air intake and / or indoor return air at the air outlet and / or air inlet of the heat exchange core 111 in the indirect evaporative cooling unit, thereby adjusting the air duct flow direction of the indirect evaporative cooling unit, and then adjusting the working mode of the indirect evaporative cooling unit.

[0043] The control method of the indirect evaporative cooling unit of the present application controls the detection mechanism through a control mechanism to obtain environmental information, and controls the opening and closing of the bypass ventilation valve group 120 and the outdoor side fan 112 based on the environmental information, and changes the flow direction of the outdoor intake air and / or indoor return air at the air outlet and / or air inlet of the heat exchange core 111 in the indirect evaporative cooling unit, thereby adjusting the air duct flow direction of the indirect evaporative cooling unit, and then adjusting the working mode of the indirect evaporative cooling unit; further, adjusting the air duct flow direction of the indirect evaporative cooling unit can reduce the opening of the outdoor side fan 112 or reduce the working speed of the outdoor side fan 112, which can reduce the energy consumption of the indirect evaporative cooling unit, thereby improving the energy efficiency of the indirect evaporative cooling unit.

[0044] In one embodiment of step S120, the air outlet of the heat exchange core 111 includes a fresh air outlet and a return air outlet. The bypass air valve assembly 120 includes a first bypass air valve 121 disposed between the fresh air outlet and the return air outlet. The indirect evaporative cooling unit also includes a first heat exchanger 130 disposed between the fresh air outlet and the outdoor fan 112, a second heat exchanger 140 disposed near the return air outlet and connected to the first heat exchanger 130, and a compressor 150 connected to the first heat exchanger 130 and the second heat exchanger 140. Figure 3 , Figure 3 yes Figure 2 Flow chart of step S120 of an embodiment of the indirect evaporative cooling unit control method. Figure 3 As shown, step S120 may further include the following steps:

[0045] Step S121: In response to the outdoor inlet air wet-bulb temperature being greater than the first outdoor inlet air switching temperature threshold, and the supply air temperature being greater than or equal to the supply air temperature threshold, the first bypass air valve 121 is controlled to close to prevent the outdoor fresh air from the fresh air outlet from entering the return air outlet area.

[0046] In response to the outdoor inlet air wet-bulb temperature being greater than a first outdoor inlet air switching temperature threshold and the supply air temperature being greater than or equal to a supply air temperature threshold, the control mechanism controls the first bypass air valve 121 to close. Outdoor fresh air enters the first air duct of the heat exchange core 111, and indoor return air enters the second air duct of the heat exchange core 111. The heat exchange core 111 cools the indoor return air. Simultaneously, the outdoor fresh air and indoor return air circulate through the first and second air ducts of the heat exchange core 111, respectively, exchanging heat and thus adjusting the supply air temperature of the indirect evaporative cooling unit. When the control mechanism controls the first bypass air valve 121 to close, airflow between the fresh air outlet and the return air outlet of the heat exchange core 111 is blocked, preventing the outdoor fresh air and indoor fresh air from circulating mutually after heat exchange. This, in turn, adjusts the unit's air duct flow direction to prevent outdoor fresh air from the fresh air outlet from entering the return air outlet area. The first outdoor inlet air switching temperature threshold refers to the first switching temperature at which the indirect evaporative cooling unit adjusts its air duct flow direction.

[0047] Step S122: Control the outdoor fan 112 to open to increase the discharge speed of the outdoor fresh air from the fresh air outlet.

[0048] The control mechanism controls the outdoor fan 112 to open, which can increase the speed of heat exchange and discharge between the outdoor fresh air and the indoor return air.

[0049] Step S123: controlling the first heat exchanger 130, the second heat exchanger 140 and the compressor 150 to operate so as to cool the indoor return air at the return air outlet.

[0050] The control mechanism controls the operation of the compressor 150, the first heat exchanger 130 and the second heat exchanger 140 to cool the indoor return air discharged from the return air outlet after heat exchange, and further adjusts the supply air temperature of the evaporative cooling unit.

[0051] In this embodiment, the order in which the above steps are performed does not affect the final effect, and thus the order of the above steps is not specifically limited.

[0052] In step S120, in response to the outdoor inlet air wet-bulb temperature being greater than the first outdoor inlet air switching temperature threshold and the supply air temperature being greater than or equal to the supply air temperature threshold, the control mechanism controls the first bypass air valve 121 to close and controls the outdoor fan 112, the first heat exchanger 130, the second heat exchanger 140 and the compressor 150 to operate, adjusts the air duct flow direction of the indirect evaporative cooling unit, so that the indirect evaporative cooling unit operates in the first mode, and accurately adjusts the supply air temperature of the computer room.

[0053] In another embodiment of step S120, the air outlet of the heat exchange core 111 includes a fresh air outlet and a return air outlet, and the air inlet includes a return air inlet. The bypass ventilation valve group 120 includes a first bypass ventilation valve 121 arranged between the fresh air outlet and the return air outlet, a second bypass ventilation valve 122 arranged between the outdoor fan 112 and the fresh air outlet, and a third bypass ventilation valve 123 arranged near the return air inlet. The indirect evaporative cooling unit also includes a first heat exchanger 130 arranged between the fresh air outlet and the outdoor fan 112, a second heat exchanger 140 arranged near the return air outlet and connected to the first heat exchanger 130, and a compressor 150 connected to the first heat exchanger 130 and the second heat exchanger 140. See Figure 4 , Figure 4 yes Figure 2 Flow chart of another embodiment of the indirect evaporative cooling unit control method step S120. Figure 4 As shown, step S120 may further include the following steps:

[0054] Step S221: In response to the outdoor inlet air dry-bulb temperature being less than or equal to the second outdoor inlet air switching temperature threshold, and the supply air temperature being greater than the supply air temperature threshold, the first heat exchanger 130, the second heat exchanger 140 and the compressor 150 are controlled to operate to cool the indoor return air discharged from the return air outlet.

[0055] Outdoor fresh air enters the first air duct of heat exchange core 111, and indoor return air enters the second air duct of heat exchange core 111. Heat exchange core 111 cools the indoor return air. Simultaneously, the outdoor fresh air and indoor return air circulate through the first and second air ducts of heat exchange core 111, respectively, exchanging heat and thereby adjusting the supply air temperature of the indirect evaporative cooling unit. Simultaneously, in response to the outdoor inlet air dry-bulb temperature being less than or equal to the second outdoor inlet air switching temperature threshold and the supply air temperature being greater than the supply air temperature threshold, the control mechanism controls the operation of first heat exchanger 130, second heat exchanger 140, and compressor 150 to cool the indoor return air at the return air outlet. The second outdoor inlet air switching temperature threshold refers to the second switching temperature at which the indirect evaporative cooling unit adjusts the air duct flow direction.

[0056] The second outdoor air inlet switching temperature threshold is lower than the first outdoor air inlet switching temperature threshold.

[0057] Step S222: Control the outdoor fan 112 and the second bypass ventilation valve 122 to close, and control the first bypass ventilation valve 121 to open, so as to mix the outdoor fresh air from the fresh air outlet with the indoor return air after cooling from the return air outlet.

[0058] The control mechanism controls the outdoor fan 112 and the second bypass vent valve 122 to close, that is, to close the air duct connecting the fresh air outlet area of ​​the heat exchange core 111 and the indirect evaporative cooling zone unit with the external environment in this area, so that the outdoor fresh air in the fresh air outlet area of ​​the heat exchange core 111 cannot be discharged from the indirect evaporative cooling unit. By controlling the first bypass vent valve 121 to open, the fresh air outlet area of ​​the heat exchange core 111 is connected to the return air outlet area, forming a new air duct. The outdoor fresh air enters the return air outlet area, mixes with the cooled indoor return air, and undergoes heat exchange again, further adjusting the supply air temperature of the indirect evaporative cooling unit.

[0059] Step S223: Control the third bypass air valve 123 to open to discharge indoor return air.

[0060] By controlling the third bypass ventilation valve 123 to open, part of the indoor return air can be discharged from the indirect evaporative cooling unit to maintain the balance of the air pressure of the indirect evaporative cooling unit.

[0061] In this embodiment, the order in which the above steps are performed does not affect the final effect, and thus the order of the above steps is not specifically limited.

[0062] Step S120 is performed by setting the above steps. The control mechanism responds to the outdoor inlet air dry-bulb temperature being less than or equal to the second outdoor inlet air switching temperature threshold and the supply air temperature being greater than the supply air temperature threshold, controls the outdoor side fan 112 and the second bypass air valve 122 to be closed, and controls the third bypass air valve 123 and the first bypass air valve 121 to be opened, adjusts the air duct flow direction in the indirect evaporative cooling unit, controls the first heat exchanger 130, the second heat exchanger 140 and the compressor 150 to operate, so as to further adjust the supply air temperature of the indirect evaporative cooling unit so that the indirect evaporative cooling unit operates in the second mode; further, when the indirect evaporative cooling unit operates in the second mode, the outdoor side fan 112 is closed, which can improve the energy efficiency of the indirect evaporative cooling unit.

[0063] In another embodiment of step S120, the air outlet of the heat exchange core 111 includes a fresh air outlet and a return air outlet, and the air inlet includes a return air inlet. The bypass ventilation valve group 120 includes a first bypass ventilation valve 121 arranged between the fresh air outlet and the return air outlet, a second bypass ventilation valve 122 arranged between the outdoor fan 112 and the fresh air outlet, a third bypass ventilation valve 123 arranged near the return air inlet, and a fourth bypass ventilation valve 124 arranged between the third bypass ventilation valve 123 and the return air inlet. The indirect evaporative cooling unit also includes a first heat exchanger 130 arranged between the fresh air outlet and the outdoor fan 112, a second heat exchanger 140 arranged near the return air outlet and connected to the first heat exchanger 130, a compressor 150 connected to the first heat exchanger 130 and the second heat exchanger 140, and a spray mechanism 160 arranged near the fresh air outlet. See. Figure 5 , Figure 5 yes Figure 2 A flow chart of another embodiment of the indirect evaporative cooling unit control method step S120. Figure 5 As shown, step S120 may further include the following steps:

[0064] Step S321: In response to the outdoor inlet air dry-bulb temperature being greater than the second outdoor inlet air switching temperature threshold, the outdoor inlet air wet-bulb temperature being less than or equal to the first outdoor inlet air switching temperature threshold, and the supply air temperature being greater than the supply air temperature threshold, the outdoor fan 112 and the second bypass air valve 122 are controlled to close to prevent the discharge of outdoor fresh air from the fresh air outlet.

[0065] In response to the outdoor inlet air dry-bulb temperature being greater than the second outdoor inlet air switching temperature threshold, the outdoor inlet air wet-bulb temperature being less than or equal to the first outdoor inlet air switching temperature threshold, and the supply air temperature being greater than the supply air temperature threshold, the control mechanism controls the outdoor side fan 112 and the second bypass air valve 122 to be closed, that is, closes the air duct connecting the fresh air outlet area of ​​the heat exchange core 111 and the indirect evaporative cooling zone unit with the external environment in this area, so that the outdoor fresh air in the fresh air outlet area of ​​the heat exchange core 111 cannot be discharged from the indirect evaporative cooling unit.

[0066] Step S322: Control the first heat exchanger 130, the second heat exchanger 140, the compressor 150, and the fourth bypass air valve 124 to close, so as to prevent the indoor return air from entering the return air inlet.

[0067] The control mechanism controls the first heat exchanger 130, the second heat exchanger 140, the compressor 150 and the fourth bypass ventilation valve 124 to be closed, and controls the third bypass ventilation valve 123 to be open, so that the indoor return air does not enter the heat exchange core 111, and is directly discharged from the indirect evaporative cooling unit from the third bypass ventilation valve 123.

[0068] Step S323: Control the first bypass air valve 121 and the spray mechanism 160 to open, so as to cool the outdoor fresh air and use the cooled outdoor fresh air as the unit supply air.

[0069] Control the spray mechanism 160 and the first bypass air valve 121 to open, so that the spray mechanism 160 cools down the outdoor fresh air entering the first air duct of the heat exchange core 111. The cooled outdoor fresh air passes through the first bypass air valve 121 and enters the area where the return air outlet of the heat exchange core 111 is located, and is used as the supply air for the indirect evaporative cooling unit.

[0070] Step S324: Control the third bypass vent valve 123 to open to discharge indoor return air.

[0071] The third bypass air valve 123 is controlled to be open so that the indoor return air does not enter the heat exchange core 111 and is directly discharged from the indirect evaporative cooling unit through the third bypass air valve 123 .

[0072] In this embodiment, the order in which the above steps are performed does not affect the final effect, and thus the order of the above steps is not specifically limited.

[0073] Step S120 is configured by setting the above steps. When the outdoor inlet air dry-bulb temperature is greater than the second outdoor inlet air switching temperature threshold, the outdoor inlet air wet-bulb temperature is less than or equal to the first outdoor inlet air switching temperature threshold, and the supply air temperature is greater than the supply air temperature threshold, the outdoor side fan 112, the second bypass air valve 122, the first heat exchanger 130, the second heat exchanger 140, the compressor 150 and the fourth bypass air valve 124 are controlled to be closed, and the third bypass air valve 123 is controlled to be opened to adjust the air duct flow direction of the indirect evaporative cooling unit, and the spray mechanism 160 is controlled to cool the outdoor fresh air, thereby adjusting the supply air temperature of the indirect evaporative cooling unit; further, when the indirect evaporative cooling unit operates in the third mode, the outdoor side fan 112, the compressor 150, the first heat exchanger 130 and the second heat exchanger 140 are closed, which can improve the energy efficiency of the indirect evaporative cooling unit.

[0074] This application also provides a storage medium, see Figure 6 , Figure 6 This is a schematic diagram of the structure of an embodiment of the storage medium provided by this application. Figure 6 As shown, storage medium 90 stores a computer program 910, which can be executed by a processor to implement any of the control methods described above for an indirect evaporative cooling unit. For the purposes of this specification, storage medium 90 can be any device that can contain, store, communicate, propagate, or transmit a program for use with an instruction execution system, device, or apparatus, or in conjunction with such an instruction execution system, device, or apparatus. More specific examples (not an exhaustive list) of storage media include the following: an electrical connection portion having one or more wires (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic device, and portable compact disc read-only memory (CDROM). In addition, the computer-readable medium can even be paper or other suitable medium on which the program is printed, as the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in other suitable ways as necessary, and then stored in a computer memory.

[0075] Compared with the prior art, the indirect evaporative cooling unit 10 is provided with an indirect evaporative cooling mechanism 110 including an outdoor fan 112 and a heat exchange core 111, and a bypass air valve group 120 is provided at the air outlet and / or air inlet near the heat exchange core 111, a detection mechanism for detecting environmental information, and a control mechanism connected to the outdoor fan 112, the bypass air valve group 120 and the detection mechanism. Through the above-mentioned setting method, the control mechanism controls the detection mechanism to obtain environmental information, and controls the opening and closing of the bypass ventilation valve group 120 and the outdoor fan 112 based on the environmental information, changes the flow direction of the outdoor intake air and / or indoor return air at the air outlet and / or air inlet of the heat exchange core 111 in the indirect evaporative cooling unit, thereby adjusting the air duct flow direction of the indirect evaporative cooling unit, and then adjusting the working mode of the indirect evaporative cooling unit; further, adjusting the air duct flow direction of the indirect evaporative cooling unit can reduce the opening of the outdoor fan 112 or reduce the working speed of the outdoor fan 112, which can reduce the energy consumption of the indirect evaporative cooling unit, thereby improving the energy efficiency of the indirect evaporative cooling unit.

[0076] The evaporative cooling unit comprises a first bypass vent valve 121 disposed between the fresh air outlet and the return air outlet of the heat exchange core 111, a first heat exchanger 130 disposed between the fresh air outlet and the outdoor fan 112, a second heat exchanger 140 disposed near the return air outlet and connected to the first heat exchanger 130, and a compressor 150 connected to both the first heat exchanger 130 and the second heat exchanger 140. With the above arrangement, when the outdoor inlet air wet-bulb temperature is greater than the first outdoor inlet air switching temperature threshold and the supply air temperature is greater than or equal to the supply air temperature threshold, the indirect evaporative cooling unit controls the closing of the first bypass vent valve 121 via a control mechanism, thereby preventing the outdoor fresh air and the indoor fresh air from circulating after heat exchange, adjusting the air flow direction of the indirect evaporative cooling unit, and thereby controlling the operation of the outdoor fan 112, the first heat exchanger 130, the second heat exchanger 140, and the compressor 150, further adjusting the supply air temperature of the indirect evaporative cooling unit, and thus adjusting the indirect evaporative cooling unit to operate in the first mode.

[0077] The indirect evaporative cooling unit is configured by disposing a second bypass vent valve 122 between the outdoor fan 112 and the fresh air outlet, and a third bypass vent valve 123 near the return air inlet of the heat exchange core 111. With the above configuration, in response to the outdoor inlet air dry-bulb temperature being less than or equal to the second outdoor inlet air switching temperature threshold and the supply air temperature being greater than the supply air temperature threshold, the control mechanism controls the outdoor fan 112 and the second bypass vent valve 122 to close, and controls the third bypass vent valve 123 and the first bypass vent valve 121 to open, thereby adjusting the air flow direction within the indirect evaporative cooling unit and controlling the operation of the first heat exchanger 130, the second heat exchanger 140, and the compressor 150 to further adjust the supply air temperature of the indirect evaporative cooling unit so that the indirect evaporative cooling unit operates in the second mode. Furthermore, when the indirect evaporative cooling unit operates in the second mode, the outdoor fan 112 is turned off, thereby improving the energy efficiency of the indirect evaporative cooling unit.

[0078] The indirect evaporative cooling unit is provided with a fourth bypass ventilation valve 124 between the third bypass ventilation valve 123 and the return air inlet of the heat exchange core 111 , and a spray mechanism 160 is provided near the fresh air outlet of the heat exchange core 111 . Through the above-mentioned setting, the indirect evaporative cooling unit controls the outdoor side fan 112, the second bypass ventilation valve 122, the first heat exchanger 130, the second heat exchanger 140, the compressor 150 and the fourth bypass ventilation valve 124 to be closed, and controls the third bypass ventilation valve 123 to be opened, so as to adjust the air duct flow direction of the indirect evaporative cooling unit, and control the spray mechanism 160 to cool the outdoor fresh air, thereby adjusting the supply air temperature of the indirect evaporative cooling unit; further, when the indirect evaporative cooling unit operates in the third mode, the outdoor side fan 112, the compressor 150, the first heat exchanger 130 and the second heat exchanger 140 are closed, which can improve the energy efficiency of the indirect evaporative cooling unit.

[0079] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0080] Any process or method description in a flowchart or otherwise described herein may be understood to represent a mechanism, segment or portion of code comprising one or more executable instructions for implementing a specific logical function or process step, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed in a sequence other than as shown or discussed, including performing functions in a substantially simultaneous manner or in a reverse order depending on the functions involved, as should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0081] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, which can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (which can be a personal computer, server, network device or other system that can fetch instructions from and execute instructions on an instruction execution system, apparatus or device), or used in conjunction with such instruction execution systems, apparatuses or devices.

[0082] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An indirect evaporative cooling unit, characterized in that: include: Indirect evaporative cooling mechanism, including: outdoor side fan; A heat exchange core, the air outlet of which is arranged close to the outdoor fan; A bypass air valve assembly is provided near the air outlet and / or air inlet of the heat exchange core; Testing agencies, used to obtain environmental information; a control mechanism connected to the outdoor fan, the bypass air valve group, and the detection mechanism, and configured to control the opening and closing of the bypass air valve group and the outdoor fan based on the environmental information, so as to adjust the air flow direction of the indirect evaporative cooling unit, thereby adjusting the operating mode of the indirect evaporative cooling unit; The environmental information includes: outdoor air inlet wet-bulb temperature, supply air temperature, and the air outlet includes fresh air outlet and return air outlet; The bypass vent valve assembly includes: a first bypass air valve, arranged between the fresh air outlet and the return air outlet; The indirect evaporative cooling unit also includes: A first heat exchanger is provided between the fresh air outlet and the outdoor fan; a second heat exchanger, disposed near the return air outlet and connected to the first heat exchanger; a compressor connected to the first heat exchanger and the second heat exchanger, and configured to provide a medium for heat exchange to the first heat exchanger and the second heat exchanger; In response to the outdoor inlet air wet-bulb temperature being greater than the first outdoor inlet air switching temperature threshold and the supply air temperature being greater than or equal to the supply air temperature threshold, the control mechanism controls the first bypass air valve to close and controls the outdoor side fan, the first heat exchanger, the second heat exchanger and the compressor to operate, so that the indirect evaporative cooling unit operates in the first mode.

2. The indirect evaporative cooling unit according to claim 1, characterized in that: The environmental information further includes: outdoor inlet dry-bulb temperature; the air inlet includes a return air inlet; the bypass air valve assembly further includes: a second bypass air valve, disposed between the outdoor fan and the fresh air outlet; A third side ventilation valve is provided near the return air inlet; In response to the outdoor inlet air dry-bulb temperature being less than or equal to a second outdoor inlet air switching temperature threshold and the supply air temperature being greater than a supply air temperature threshold, the control mechanism controls the outdoor fan and the second bypass vent valve to be closed, controls the third bypass vent valve and the first bypass vent valve to be open, and controls the first heat exchanger, the second heat exchanger, and the compressor to operate, so that the indirect evaporative cooling unit operates in the second mode; The second outdoor air inlet switching temperature threshold is lower than the first outdoor air inlet switching temperature threshold.

3. The indirect evaporative cooling unit according to claim 2, characterized in that: The bypass air valve group further includes: a fourth bypass air valve, which is arranged near the return air inlet and is located between the third bypass air valve and the return air inlet; The indirect evaporative cooling unit further comprises: a spray mechanism, arranged near the fresh air outlet; In response to the outdoor inlet air dry-bulb temperature being greater than the second outdoor inlet air switching temperature threshold, the outdoor inlet air wet-bulb temperature being less than or equal to the first outdoor inlet air switching temperature threshold, and the supply air temperature being greater than the supply air temperature threshold, the control mechanism controls the outdoor side fan, the second bypass air valve, the first heat exchanger, the second heat exchanger and the compressor, and the fourth bypass air valve to be closed, and controls the third bypass air valve, the first bypass air valve and the spray mechanism to be opened, so that the indirect evaporative cooling unit operates in the third mode.

4. The indirect evaporative cooling unit according to claim 3, characterized in that: The control mechanism controls the opening ratios of the third bypass vent valve and the fourth bypass vent valve to adjust the supply air temperature.

5. A control method for an indirect evaporative cooling unit, characterized in that: The control method is used for the indirect evaporative cooling unit according to any one of claims 1 to 4, and the control method comprises: the control mechanism controlling the detection mechanism to obtain environmental information; The control mechanism controls the opening and closing of the bypass air valve group and the outdoor fan based on the environmental information to adjust the air duct flow direction of the indirect evaporative cooling unit, thereby adjusting the working mode of the indirect evaporative cooling unit.

6. The control method according to claim 5, characterized in that: The air outlet of the heat exchange core includes a fresh air outlet and a return air outlet; The bypass vent valve assembly includes a first bypass vent valve disposed between the fresh air outlet and the return air outlet; The indirect evaporative cooling unit further includes a first heat exchanger disposed between the fresh air outlet and the outdoor fan, a second heat exchanger disposed near the return air outlet and connected to the first heat exchanger, and a compressor connected to the first heat exchanger and the second heat exchanger; The control mechanism controls the opening and closing of the bypass vent valve assembly and the outdoor fan based on the environmental information to adjust the air duct flow direction of the indirect evaporative cooling unit, thereby adjusting the operating mode of the indirect evaporative cooling unit, including: in response to the outdoor inlet air wet-bulb temperature being greater than a first outdoor inlet air switching temperature threshold and the supply air temperature being greater than or equal to a supply air temperature threshold, controlling the first bypass vent valve to close, so as to prevent the outdoor fresh air from the fresh air outlet from entering the area of ​​the return air outlet; Controlling the outdoor fan to open to increase the discharge speed of outdoor fresh air from the fresh air outlet; The first heat exchanger, the second heat exchanger and the compressor are controlled to operate so as to cool the indoor return air at the return air outlet.

7. The control method according to claim 5, characterized in that: The air outlet of the heat exchange core includes a fresh air outlet and a return air outlet, and the air inlet includes a return air inlet; The bypass ventilator assembly includes a first bypass ventilator arranged between the fresh air outlet and the return air outlet, a second bypass ventilator arranged between the outdoor fan and the fresh air outlet, and a third bypass ventilator arranged near the return air inlet; The indirect evaporative cooling unit further includes a first heat exchanger disposed between the fresh air outlet and the outdoor fan, a second heat exchanger disposed near the return air outlet and connected to the first heat exchanger, and a compressor connected to the first heat exchanger and the second heat exchanger; The control mechanism controls the opening and closing of the bypass air valve assembly and the outdoor fan based on the environmental information to adjust the air duct flow direction of the indirect evaporative cooling unit, thereby adjusting the operating mode of the indirect evaporative cooling unit, including: in response to the outdoor inlet air dry-bulb temperature being less than or equal to the second outdoor inlet air switching temperature threshold and the supply air temperature being greater than the supply air temperature threshold, controlling the first heat exchanger, the second heat exchanger, and the compressor to operate so as to cool the indoor return air discharged from the return air outlet; Controlling the outdoor fan and the second bypass vent valve to close, and controlling the first bypass vent valve to open, so as to mix the outdoor fresh air from the fresh air outlet with the indoor return air after cooling from the return air outlet; Controlling the third bypass vent valve to open to discharge indoor return air; The second outdoor air inlet switching temperature threshold is lower than the first outdoor air inlet switching temperature threshold.

8. The control method according to claim 5, characterized in that: The air outlet of the heat exchange core includes a fresh air outlet and a return air outlet, and the air inlet includes a return air inlet; The bypass ventilator assembly includes a first bypass ventilator arranged between the fresh air outlet and the return air outlet, a second bypass ventilator arranged between the outdoor fan and the fresh air outlet, a third bypass ventilator arranged near the return air inlet, and a fourth bypass ventilator arranged between the third bypass ventilator and the return air inlet; The indirect evaporative cooling unit further includes a first heat exchanger disposed between the fresh air outlet and the outdoor fan, a second heat exchanger disposed near the return air outlet and connected to the first heat exchanger, a compressor connected to the first heat exchanger and the second heat exchanger, and a spray mechanism disposed near the fresh air outlet; The control mechanism controls the opening and closing of the bypass vent valve assembly and the outdoor fan based on the environmental information to adjust the air duct flow direction of the indirect evaporative cooling unit, thereby adjusting the working mode of the indirect evaporative cooling unit, including: in response to the outdoor inlet air dry-bulb temperature being greater than the second outdoor inlet air switching temperature threshold, the outdoor inlet air wet-bulb temperature being less than or equal to the first outdoor inlet air switching temperature threshold, and the supply air temperature being greater than the supply air temperature threshold, controlling the outdoor fan and the second bypass vent valve to close, so as to prevent the discharge of outdoor fresh air from the fresh air outlet; Controlling the first heat exchanger, the second heat exchanger, the compressor, and the fourth bypass vent valve to close, so as to prevent indoor return air from entering the return air inlet; Controlling the first bypass air valve and the spray mechanism to open, so as to cool the outdoor fresh air and use the cooled outdoor fresh air as the unit supply air; The third bypass vent valve is controlled to open to discharge indoor return air.

9. A storage medium, characterized in that: A computer program is stored, and the computer program can be executed by a processor to implement the control method according to any one of claims 5 to 8.

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