Indirect evaporative cooling unit with fresh air humidification and control method thereof

Abstract

The application provides an indirect evaporative cooling unit with fresh air humidity control and a control method thereof, which can be used in the financial field or other fields. The indirect evaporative cooling unit comprises a shell, an air-to-air heat exchanger, a spraying chamber and a mixing chamber arranged in the shell. The air-to-air heat exchanger is in communication with the spraying chamber, the mixing chamber, indoor air and outdoor air respectively. The spraying chamber is in communication with the mixing chamber and outdoor air respectively. The spraying chamber is used for adjusting the humidity and temperature of outdoor fresh air. The air-to-air heat exchanger is used for heat exchange of outdoor fresh air and indoor return air. The mixing chamber is used for mixing outdoor fresh air and indoor return air. The indirect evaporative cooling unit provided by the application has reliable structure, can improve the reliability of the control of the indirect evaporative cooling unit, and can meet the demand of indoor fresh air, and realize temperature and humidity adjustment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of indirect evaporative cooling unit control, and particularly relates to an indirect evaporative cooling unit with fresh air humidification and a control method thereof. BACKGROUND

[0002] Due to the demand for green energy saving and the huge energy consumption of data centers, the traditional data center refrigeration system generally uses a water chiller for refrigeration. The cold water system is very complex and has many fault points, and operation and maintenance are difficult. Therefore, data centers gradually begin to use indirect evaporative cooling units for refrigeration. The indirect evaporative cooling unit only cools outdoor fresh air by spraying water, and then exchanges heat with indoor return air to cool the indoor return air and send it to the indoor.

[0003] However, the indirect evaporative cooling unit has the following problems. First, the indirect evaporative cooling unit only circulates indoor air to meet the cooling demand of the machine room. The fresh air demand of the indoor machine room needs to be separately deployed with a fresh air unit to meet the fresh air demand, health demand, and positive pressure requirement of the indoor machine room. The separate deployment of the fresh air unit also requires the deployment of corresponding pipelines. Thus, the separate deployment of the fresh air unit not only increases the refrigeration energy consumption and operating costs, but also increases the land occupation and construction costs due to the increase in pipelines. Second, the indirect evaporative cooling unit does not have a humidity adjustment function and can only meet the temperature demand of the machine room but cannot meet the humidity requirement. Thus, the humidity in summer is too high and exceeds the humidity requirement of the machine room, and the humidity in winter is too low and cannot meet the humidity requirement of the machine room, which affects the safe operation of the server in the machine room. If a dehumidification and humidification machine is separately configured in the machine room, the investment cost is increased, and the dehumidification and humidification machine consumes a large amount of energy. Third, due to the high temperature in summer and the efficiency problem of the air-to-air heat exchanger, the cooling of the return air to the required supply air temperature cannot be achieved by only exchanging heat between the fresh air sprayed with water and the indoor return air. SUMMARY

[0004] To solve at least one problem in the prior art, the present application provides an indirect evaporative cooling unit with fresh air humidification and a control method thereof. The structure of the indirect evaporative cooling unit is reliable, can improve the reliability of the control of the indirect evaporative cooling unit, and can meet the indoor fresh air demand and achieve temperature and humidity adjustment.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] In a first aspect, the present application provides an indirect evaporative cooling unit with fresh air humidification, comprising: a shell, an air-to-air heat exchanger, a spraying chamber, and a mixing chamber arranged in the shell; wherein,

[0007] The air-to-air heat exchanger is in communication with the spraying chamber, the mixing chamber, the indoor, and the outdoor, respectively. The spraying chamber is in communication with the mixing chamber and the outdoor, respectively.

[0008] The spray chamber is used for humidity and temperature adjustment of outdoor fresh air, the air-to-air heat exchanger is used for heat exchange of outdoor fresh air and indoor return air, and the mixing chamber is used for mixing of outdoor fresh air and indoor return air.

[0009] In one embodiment, the indirect evaporative cooling unit further comprises a compressor, a four-way reversing valve, an expansion valve arranged in the shell, and a second heat exchange coil arranged between the air-to-air heat exchanger and the mixing chamber, and the spray chamber comprises a water pan and a first heat exchange coil arranged in the water pan.

[0010] The four-way reversing valve is connected with the compressor, the first heat exchange coil and the second heat exchange coil respectively, and the first heat exchange coil and the second heat exchange coil are connected via the expansion valve.

[0011] In one embodiment, the indirect evaporative cooling unit further comprises an exhaust fan arranged between the air-to-air heat exchanger and the mixing chamber, and a supply fan arranged between the air-to-air heat exchanger and the mixing chamber.

[0012] In one embodiment, the indirect evaporative cooling unit further comprises a first temperature acquisition device and a first humidity acquisition device arranged in the air-to-air heat exchanger, and a second temperature acquisition device and a second humidity acquisition device arranged in the spray chamber.

[0013] In a second aspect, the application further provides a control method of an indirect evaporative cooling unit with fresh air humidity control, applied to the indirect evaporative cooling unit, comprising:

[0014] The first outdoor fresh air is sent into the spray chamber, the current working condition is obtained, it is judged whether the current working condition belongs to the preset summer working condition, if yes, the spray chamber is controlled to spray the first outdoor fresh air, and after it is monitored and determined that the first outdoor fresh air after spraying meets the preset first temperature and humidity condition, the first outdoor fresh air after spraying is transmitted to the air-to-air heat exchanger;

[0015] The first indoor return air is sent into the air-to-air heat exchanger to exchange heat with the first outdoor fresh air, if it is monitored and determined that the first indoor return air after heat exchange meets the temperature and humidity condition corresponding to the preset summer working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged outdoors;

[0016] The second outdoor fresh air is sent into the spray chamber, the spray chamber is controlled to spray the second outdoor fresh air, and after the second outdoor fresh air meets the preset second temperature and humidity condition, the second outdoor fresh air after spraying is transmitted to the mixing chamber;

[0017] The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the indoor.

[0018] In one embodiment, after the first indoor return air is sent into the air-to-air heat exchanger and exchanges heat with the first outdoor fresh air, further comprising:

[0019] If the monitoring determines that the first indoor return air after heat exchange does not meet the preset temperature and humidity conditions corresponding to the summer operating condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged outdoors;

[0020] The second outdoor fresh air is sent into the spraying chamber, the spraying chamber sprays the second outdoor fresh air, and after monitoring determines that the second outdoor fresh air meets the preset third temperature and humidity conditions, the sprayed second outdoor fresh air is transmitted to the mixing chamber;

[0021] The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the indoor.

[0022] In one embodiment, the control of the spraying chamber to spray the second outdoor fresh air, and after monitoring determines that the second outdoor fresh air meets the preset third temperature and humidity conditions, the sprayed second outdoor fresh air is transmitted to the mixing chamber, comprising:

[0023] The compressor is controlled to be turned on, the refrigerant is compressed into a high-temperature and high-pressure gas, enters the first heat exchange coil after heat exchange via a four-way reversing valve, the first heat exchange coil is cooled and the high-temperature and high-pressure gas is converted into a high-temperature and high-pressure liquid, the high-temperature and high-pressure liquid is converted into a low-temperature and low-pressure liquid via an expansion valve, the low-temperature and low-pressure liquid enters the second heat exchange coil and is converted into a low-temperature and low-pressure gas, enters the compressor, so that the liquid in the water pan is cooled after the first heat exchange coil is cooled, and the cooled liquid is used to spray the second outdoor fresh air;

[0024] After monitoring determines that the second outdoor fresh air meets the preset third temperature and humidity conditions, the sprayed second outdoor fresh air is transmitted to the mixing chamber.

[0025] In one embodiment, after the current operating condition is obtained, further comprising:

[0026] If the current operating condition is a preset winter operating condition, the first outdoor fresh air is transmitted to the air-to-air heat exchanger;

[0027] The first indoor return air is sent into the air-to-air heat exchanger and exchanges heat with the first outdoor fresh air, and if the monitoring determines that the first indoor return air after heat exchange meets the preset temperature and humidity conditions corresponding to the winter operating condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged outdoors;

[0028] The second outdoor fresh air is sent into the spraying chamber, the spraying chamber sprays the second outdoor fresh air, and after monitoring and determining that the second outdoor fresh air meets a preset fourth temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber.

[0029] The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the indoor.

[0030] In an embodiment, the indirect evaporative cooling unit control method further comprises:

[0031] If monitoring and determination show that the heat-exchanged first indoor return air does not meet the temperature and humidity condition corresponding to the preset winter working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged outdoors.

[0032] The second outdoor fresh air is sent into the spraying chamber, the spraying chamber sprays the second outdoor fresh air, and after monitoring and determining that the second outdoor fresh air meets a preset fifth temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber.

[0033] The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the indoor.

[0034] In an embodiment, the spraying chamber sprays the second outdoor fresh air, and after monitoring and determining that the second outdoor fresh air meets a preset fifth temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber, which comprises:

[0035] The compressor is controlled to be turned on, the refrigerant is compressed into a high-temperature and high-pressure gas, enters the second heat exchange coil for heat exchange, the second heat exchange coil is cooled, and the high-temperature and high-pressure gas is converted into a high-temperature and high-pressure liquid, the high-temperature and high-pressure liquid is converted into a low-temperature and low-pressure liquid through an expansion valve, the low-temperature and low-pressure liquid enters the first heat exchange coil to be converted into a low-temperature and low-pressure gas, and the first heat exchange coil is warmed up, enters the compressor, so that the liquid in the water pan is warmed up after the first heat exchange coil is warmed up, and the second outdoor fresh air is sprayed by using the warmed-up liquid;

[0036] After monitoring and determining that the second outdoor fresh air meets a preset fifth temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber.

[0037] In an embodiment, after the current working condition is acquired, the method further comprises:

[0038] If the current working condition is a preset transition season working condition, the first outdoor fresh air is transmitted to the air-to-air heat exchanger through the spraying chamber.

[0039] The first indoor return air is sent into the air-air heat exchanger to exchange heat with the first outdoor fresh air;

[0040] The first indoor return air after heat exchange is transmitted to the mixing chamber, and the first outdoor fresh air after heat exchange is discharged outdoors.

[0041] The second outdoor fresh air is transmitted to the mixing chamber through the spraying chamber, and the second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent indoors.

[0042] In one embodiment, the indirect evaporative cooling unit control method further comprises:

[0043] The pressure data of the indoor environment is collected, and the second indoor return air is discharged outdoors according to the pressure data of the indoor environment.

[0044] In a third aspect, the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to realize the indirect evaporative cooling unit control method.

[0045] In a fourth aspect, the present application provides a computer readable storage medium having computer instructions stored thereon, wherein the instructions are executed by a processor to realize the indirect evaporative cooling unit control method.

[0046] As can be seen from the above technical solution, the present application provides an indirect evaporative cooling unit with fresh air humidification and a control method thereof. The indirect evaporative cooling unit comprises a shell, an air-air heat exchanger, a spraying chamber, and a mixing chamber arranged in the shell. The air-air heat exchanger is in communication with the spraying chamber, the mixing chamber, the indoor environment, and the outdoor environment. The spraying chamber is in communication with the mixing chamber and the outdoor environment. The spraying chamber is used for adjusting the humidity and temperature of outdoor fresh air. The air-air heat exchanger is used for exchanging heat between outdoor fresh air and indoor return air. The mixing chamber is used for mixing outdoor fresh air and indoor return air. The structure of the indirect evaporative cooling unit is reliable, which can improve the reliability of the indirect evaporative cooling unit control, thereby meeting the demand for indoor fresh air, achieving temperature and humidity adjustment, and meeting the demand for supply air temperature. Specifically, the indirect evaporative cooling unit has a fresh air function and a humidity adjustment function, which reduces operation and investment costs, meets the humidity demand of the machine room, and makes the operation of the machine room equipment more secure. The compressor refrigeration is used for spraying water temperature adjustment, which can effectively reduce the operation time of the compressor, reduce the energy consumption of the compressor refrigeration, improve the system operation efficiency, and be more conducive to the control and safety of the machine room temperature and humidity. In addition, it can effectively ensure the requirement of positive pressure in the machine room, ensure the air quality demand of the machine room, and protect the normal operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0048] Figure 1 is the front view of the indirect evaporative cooling unit in the embodiments of the present application;

[0049] Figure 2 is the rear view of the indirect evaporative cooling unit in the embodiments of the present application;

[0050] Figure 3 is the top view of the indirect evaporative cooling unit in the embodiments of the present application;

[0051] Figure 4 is the bottom view of the indirect evaporative cooling unit in the embodiments of the present application;

[0052] Figure 5 is the schematic diagram of the relationship among the compressor, the four-way reversing valve, the expansion valve, the second heat exchange coil and the first heat exchange coil in the embodiments of the present application;

[0053] Figure 6 is the first flow schematic diagram of the control method of the indirect evaporative cooling unit in the embodiments of the present application;

[0054] Figure 7 is the second flow schematic diagram of the control method of the indirect evaporative cooling unit in the embodiments of the present application;

[0055] Figure 8 is the structural schematic diagram of the control device of the indirect evaporative cooling unit in the embodiments of the present application;

[0056] Figure 9 is the schematic block diagram of the system structure of the electronic device in the embodiments of the present application. DETAILED DESCRIPTION

[0057] In order to make the person skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0058] To address the problems existing in the prior art, this application provides an indirect evaporative cooling unit with fresh air dehumidification and its control method. By treating a portion of the fresh air through a spray system and mixing it with the indoor supply air, the indoor supply air meets the temperature and humidity requirements, while also satisfying the requirements for fresh air and positive pressure. This indirect evaporative cooling unit features both fresh air and dehumidification functions, reducing operating and investment costs, meeting the humidity requirements of the computer room, and ensuring safer operation of the equipment. The compressor refrigeration is used for spray water temperature regulation, effectively reducing compressor running time, lowering compression refrigeration energy consumption, improving system operating efficiency, and further facilitating temperature and humidity control and ensuring safety and reliability in the computer room. Furthermore, it effectively guarantees the positive pressure requirements of the computer room, ensures the required air quality, and guarantees the normal operation of the equipment.

[0059] It should be noted that the indirect evaporative cooling unit with fresh air dehumidification and its control method disclosed in this application can be used in the field of financial technology, as well as in any other field. The application field of the indirect evaporative cooling unit with fresh air dehumidification and its control method disclosed in this application is not limited. The acquisition, storage, use, and processing of data in the technical solutions of each embodiment of this application all comply with relevant laws and regulations.

[0060] The following examples illustrate this in detail.

[0061] To meet indoor fresh air requirements and achieve temperature and humidity regulation, this embodiment provides an indirect evaporative cooling unit with fresh air humidity control, such as... Figures 1 to 4 As shown, the indirect evaporative cooling unit specifically includes: a shell 1, an air-to-air heat exchanger 2 disposed within the shell, a spray chamber 3, and a mixing chamber 4; wherein, the air-to-air heat exchanger is connected to the spray chamber, the mixing chamber, the indoor unit, and the outdoor unit respectively, and the spray chamber is connected to the mixing chamber and the outdoor unit respectively; the spray chamber is used to regulate the humidity and temperature of the outdoor fresh air, the air-to-air heat exchanger is used to exchange heat between the outdoor fresh air and the indoor return air, and the mixing chamber is used to mix the outdoor fresh air and the indoor return air.

[0062] Specifically, the indirect evaporative cooling unit may further include: an exhaust fan 9 disposed between the air-to-air heat exchanger and the mixing chamber, and a blower 10 disposed between the air-to-air heat exchanger and the mixing chamber. The exhaust fan can be used to adjust the airflow and air volume to exhaust air outdoors, and the blower can be used to adjust the airflow and air volume to deliver air indoors. A first chamber and a second chamber may be provided between the air-to-air heat exchanger and the mixing chamber. The exhaust fan may be disposed in the first chamber, and the blower may be disposed in the second chamber. The first chamber and the second chamber are isolated from each other and are not interconnected.

[0063] In order to realize the real-time collection of the temperature and humidity in the air-to-air heat exchanger and the spraying chamber, in an embodiment, the indirect evaporative cooling unit further comprises: a first temperature collection device, a first humidity collection device arranged in the air-to-air heat exchanger, a second temperature collection device, and a second humidity collection device arranged in the spraying chamber.

[0064] In the prior art, the air-to-air heat exchanger and the spraying chamber cannot realize the complete cooling of the return air to the required supply air temperature, and the compressor needs to be started to compress air for refrigeration. This method has high energy consumption. In order to effectively reduce the operation time of the compressor, reduce the energy consumption of the compression refrigeration, improve the operation efficiency of the system, and meet the supply air temperature requirement, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 5 In an embodiment, the indirect evaporative cooling unit further comprises: a compressor 5, a four-way reversing valve 6, an expansion valve 7 arranged in the shell, and a second heat exchange coil 8 arranged between the air-to-air heat exchanger and the mixing chamber. The spraying chamber 3 comprises: a water pan and a first heat exchange coil 31 arranged in the water pan; the four-way reversing valve is connected with the compressor, the first heat exchange coil and the second heat exchange coil respectively, and the first heat exchange coil is connected with the second heat exchange coil via the expansion valve.

[0065] Specifically, the second heat exchange coil can be arranged between the air-to-air heat exchanger and the exhaust fan; the compressor refrigeration is used for spraying water temperature adjustment; the second outdoor fresh air can be connected with the first heat exchange coil arranged in the water pan of the spraying chamber, and the first heat exchange coil, the compressor, the expansion valve, the four-way reversing valve and the second heat exchange coil form a refrigeration and heating cycle. Through the four-way reversing valve, in winter, the first heat exchange coil is used as a heating coil (condenser) to heat the spraying water, and in summer, the first heat exchange coil is used as a refrigeration coil (evaporator) to cool the spraying water. The change of the spraying water temperature realizes the cooling and dehumidification and the heating and humidification of the second outdoor fresh air after spraying, and the treated first indoor return air and the second outdoor fresh air after spraying are mixed to meet the requirements of the indoor supply air temperature and humidity.

[0066] (1) In summer, if the treated first indoor return air cannot meet the indoor temperature requirement or the treated first indoor return air and the second outdoor fresh air after spraying cannot meet the indoor temperature and humidity requirement, the compressor is started, and the four-way reversing valve is adjusted, so that the first heat exchange coil is used as a refrigeration coil (evaporator) to cool the water temperature, and then the second outdoor fresh air is cooled and dehumidified after spraying, and the treated first indoor return air and the second outdoor fresh air after spraying are mixed to meet the requirements of the indoor supply air temperature and humidity and the fresh air requirement.

[0067] (2) In winter, if the treated first indoor return air cannot meet the indoor humidity requirement or the treated first indoor return air and the sprayed second outdoor fresh air cannot meet the indoor humidity requirement, the compressor is started, the four-way reversing valve is adjusted, the first heat exchange coil is used as a heating coil (evaporator) to raise the water temperature, and then the second outdoor fresh air is heated and humidified after spraying, and the speed of the first indoor return air supply fan is adjusted so that the treated first indoor return air and the second outdoor fresh air after mixing meet the indoor supply air temperature and humidity requirements and the fresh air requirements.

[0068] Further, as shown in Figure 2 and Figure 3 , the indirect evaporative cooling unit can further include a water pump 11 connected with the water pan for conveying the liquid in the water pan; the indirect evaporative cooling unit can further include a controller connected with the water pump, the first temperature acquisition device, the first humidity acquisition device, the second temperature acquisition device, the second humidity acquisition device, the compressor, the exhaust fan, the supply fan, the four-way reversing valve and the expansion valve respectively. The liquid in the water pan can be water.

[0069] In order to improve the reliability of the indirect evaporative cooling unit control and further meet the indoor fresh air requirements and realize temperature and humidity regulation, the embodiment provides an indirect evaporative cooling unit control method with an indirect evaporative cooling unit control device as the execution subject, which is applied to the indirect evaporative cooling unit. The indirect evaporative cooling unit control device includes but is not limited to a server, which can be the above-mentioned controller, as shown in Figure 6 , the method specifically includes the following contents:

[0070] Step 101: The first outdoor fresh air is sent into the spraying chamber, the current working condition is obtained, and it is determined whether the current working condition belongs to the preset summer working condition. If yes, the spraying chamber sprays the first outdoor fresh air, and after monitoring that the first outdoor fresh air meets the preset first temperature and humidity condition, the sprayed first outdoor fresh air is transmitted to the air-air heat exchanger.

[0071] Specifically, the second temperature acquisition device and the second humidity acquisition device arranged in the spraying chamber can be used to acquire the temperature and humidity of the first outdoor fresh air, and whether the first outdoor fresh air meets the preset first temperature and humidity condition is monitored according to the temperature and humidity of the first outdoor fresh air.

[0072] Step 102: The first indoor return air is sent into the air-air heat exchanger to exchange heat with the first outdoor fresh air. If it is monitored that the first indoor return air after heat exchange meets the temperature and humidity condition corresponding to the preset summer working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged outdoors.

[0073] Specifically, the first temperature collecting device and the first humidity collecting device arranged in the air-to-air heat exchanger can be used to collect the temperature and humidity of the first indoor return air after heat exchange, and whether the first indoor return air after heat exchange meets the preset temperature and humidity condition corresponding to the summer working condition can be monitored.

[0074] Step 103: The second outdoor fresh air is sent into the spraying chamber, the spraying chamber is controlled to spray the second outdoor fresh air, and after the sprayed second outdoor fresh air meets the preset second temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber.

[0075] Step 104: The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the indoor.

[0076] Specifically, the indoor can represent an indoor of a computer room, and the outdoor represents an outdoor of the computer room; the current working condition can include a current date and temperature information, and the preset summer working condition can include a preset summer date range and a preset temperature range; the preset summer working condition, the preset first temperature and humidity condition, the temperature and humidity condition corresponding to the preset summer working condition, and the preset second temperature and humidity condition can be set according to actual conditions, and the application does not limit this. The temperature and humidity condition corresponding to the preset summer working condition and the preset second temperature and humidity condition can be the same, for example, the temperature is set to 25 degrees Celsius, and the relative humidity is 65%. The outdoor fresh air can be continuously sent into the spraying chamber, and when it is monitored and determined that the indoor return air after heat exchange meets the temperature and humidity condition corresponding to the preset summer working condition, the outdoor fresh air currently sent into the spraying chamber is determined as the second outdoor fresh air, and the previous outdoor fresh air is determined as the first outdoor fresh air.

[0077] In order to make the air entering the indoor via the indirect evaporative cooling unit meet the supply air temperature requirement, in an embodiment, after the first indoor return air is sent into the air-to-air heat exchanger to exchange heat with the first outdoor fresh air in step 102, the method further includes:

[0078] Step 201: If it is monitored and determined that the first indoor return air after heat exchange does not meet the temperature and humidity condition corresponding to the preset summer working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged outdoors.

[0079] Step 202: The second outdoor fresh air is sent into the spraying chamber, the spraying chamber is controlled to spray the second outdoor fresh air, and after it is monitored and determined that the sprayed second outdoor fresh air meets a preset third temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber.

[0080] Step 203: The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the indoor.

[0081] Specifically, the third temperature and humidity condition can be set according to actual conditions, and the present application does not limit this. The temperature condition in the preset third temperature and humidity condition is lower than the temperature condition corresponding to the preset summer operating condition, and the humidity condition is lower than the humidity condition corresponding to the preset summer operating condition. If it is determined through monitoring that the temperature and humidity of the first indoor return air after heat exchange are both higher than the temperature and humidity conditions corresponding to the preset summer operating condition, it is determined that the first indoor return air after heat exchange does not meet the temperature and humidity conditions corresponding to the preset summer operating condition; if it is determined through monitoring that the temperature and humidity of the second outdoor fresh air are both lower than the preset third temperature and humidity condition, it is determined that the second outdoor fresh air meets the preset third temperature and humidity condition.

[0082] In order to effectively reduce the compressor operating time and reduce the compression refrigeration energy consumption and improve the system operating efficiency on the basis of meeting the indoor supply air temperature, as shown in the present application, in one embodiment of the present application, the step 202 controls the spraying of the second outdoor fresh air in the spraying chamber, and after it is determined through monitoring that the second outdoor fresh air meets the preset third temperature and humidity condition, the second outdoor fresh air after spraying is transmitted to the mixing chamber, which includes: Figure 7

[0083] Step 301: Control the compressor to start, compress the refrigerant into a high-temperature and high-pressure gas, enter the first heat exchange coil after heat exchange via the four-way reversing valve, the first heat exchange coil is cooled and the high-temperature and high-pressure gas is converted into a high-temperature and high-pressure liquid, the high-temperature and high-pressure liquid is converted into a low-temperature and low-pressure liquid via the expansion valve, the low-temperature and low-pressure liquid enters the second heat exchange coil to be converted into a low-temperature and low-pressure gas, enters the compressor, and is used to cool the liquid in the water pan after the first heat exchange coil is cooled, and the liquid after cooling is used to spray the second outdoor fresh air.

[0084] Step 302: After it is determined through monitoring that the second outdoor fresh air meets the preset third temperature and humidity condition, the second outdoor fresh air after spraying is transmitted to the mixing chamber.

[0085] Specifically, the compressor compresses the refrigerant into a high-temperature and high-pressure gas, enters the heat exchange coil after heat exchange via the four-way reversing valve, becomes a high-temperature and high-pressure liquid, becomes a low-temperature and low-pressure liquid after the expansion valve, becomes a low-temperature and low-pressure gas after heat exchange in the heat exchange coil, and finally enters the compressor to complete the cycle. The four-way reversing valve can make the heat exchange coil be a condenser or an evaporator.

[0086] In order to improve the reliability of the indirect evaporative cooling unit control in winter and further meet the indoor fresh air demand and realize temperature and humidity regulation, in one embodiment of the present application, after the current operating condition is obtained in step 100, it further includes:

[0087] ​Step 401: judging whether the current working condition is a preset winter working condition, if yes, transmitting the first outdoor fresh air to the air-air heat exchanger.

[0088] Step 402: sending the first indoor return air into the air-air heat exchanger to exchange heat with the first outdoor fresh air, if the monitored first indoor return air after heat exchange meets the preset temperature and humidity condition corresponding to the winter working condition, transmitting the first indoor return air to the mixing chamber, and discharging the first outdoor fresh air outdoors.

[0089] Step 403: sending the second outdoor fresh air into the spraying chamber, controlling the spraying chamber to spray the second outdoor fresh air, and transmitting the sprayed second outdoor fresh air to the mixing chamber after monitoring that the second outdoor fresh air meets a preset fourth temperature and humidity condition.

[0090] Step 404: sending the second outdoor fresh air and the first indoor return air mixed in the mixing chamber into the indoor.

[0091] Specifically, the preset winter working condition can include a preset winter date range and a preset winter temperature range; the preset winter working condition, the preset temperature and humidity condition corresponding to the winter working condition, and the preset fourth temperature and humidity condition can be set according to actual conditions, and the application does not limit this. The preset temperature and humidity condition corresponding to the winter working condition can be the same as the preset fourth temperature and humidity condition.

[0092] In order to effectively reduce the compressor operation time, reduce the compression refrigeration energy consumption, and improve the system operation efficiency on the basis of meeting the indoor supply air temperature, in an embodiment of the application, the indirect evaporative cooling unit control method further includes:

[0093] Step 501: if the monitored first indoor return air after heat exchange does not meet the preset temperature and humidity condition corresponding to the winter working condition, transmitting the first indoor return air to the mixing chamber, and discharging the first outdoor fresh air outdoors.

[0094] Step 502: sending the second outdoor fresh air into the spraying chamber, controlling the spraying chamber to spray the second outdoor fresh air, and transmitting the sprayed second outdoor fresh air to the mixing chamber after monitoring that the second outdoor fresh air meets a preset fifth temperature and humidity condition.

[0095] Step 503: sending the second outdoor fresh air and the first indoor return air mixed in the mixing chamber into the indoor.

[0096] Specifically, the preset fifth temperature and humidity condition can be set according to actual conditions, and the application does not limit this. The temperature condition in the preset fifth temperature and humidity condition is higher than the temperature condition corresponding to the preset winter working condition, and the humidity condition is lower than the humidity condition corresponding to the preset winter working condition. If it is determined through monitoring that the temperature and humidity of the first indoor return air after heat exchange are both lower than the temperature and humidity conditions corresponding to the preset winter working condition, it is determined that the first indoor return air after heat exchange does not meet the temperature and humidity conditions corresponding to the preset winter working condition; if it is determined through monitoring that the temperature and humidity of the second outdoor fresh air are both higher than the preset fifth temperature and humidity condition, it is determined that the second outdoor fresh air meets the preset fifth temperature and humidity condition.

[0097] In order to effectively reduce the running time of the compressor and reduce the energy consumption of the compression refrigeration on the basis of meeting the indoor supply air temperature in winter, improve the system operation efficiency, in an embodiment of the application, the step 502 of controlling the spray room to spray the second outdoor fresh air, after it is determined through monitoring that the second outdoor fresh air meets the preset fifth temperature and humidity condition, the second outdoor fresh air after spraying is transmitted to the mixing room, comprising:

[0098] Step 601: control the compressor to start, compress the refrigerant into high-temperature and high-pressure gas, after the second heat exchange coil, the second heat exchange coil cools down and the high-temperature and high-pressure gas is converted into high-temperature and high-pressure liquid, the high-temperature and high-pressure liquid is converted into low-temperature and low-pressure liquid through the expansion valve, the low-temperature and low-pressure liquid enters the first heat exchange coil to convert into low-temperature and low-pressure gas and the first heat exchange coil warms up, enters the compressor, so that the liquid in the water pan is warmed up after the first heat exchange coil warms up, and the second outdoor fresh air is sprayed with the liquid after warming up.

[0099] Step 602: after it is determined through monitoring that the second outdoor fresh air meets the preset fifth temperature and humidity condition, the second outdoor fresh air after spraying is transmitted to the mixing room.

[0100] In order to improve the reliability of the indirect evaporative cooling unit control in the transition season, and further meet the indoor fresh air demand and realize temperature and humidity regulation, in an embodiment of the application, after the current working condition is obtained in step 100, it further comprises:

[0101] Step 701: determine whether the current working condition is a preset transition season working condition, if yes, the first outdoor fresh air is transmitted to the air-air heat exchanger through the spray room.

[0102] Step 702: the first indoor return air is sent into the air-air heat exchanger to exchange heat with the first outdoor fresh air.

[0103] Step 703: transmitting the heat-exchanged first indoor return air to the mixing chamber, and discharging the heat-exchanged first outdoor fresh air outside.

[0104] Step 704: transmitting the second outdoor fresh air to the mixing chamber via the spraying chamber, and mixing the second outdoor fresh air and the first indoor return air in the mixing chamber and then sending them into the indoor.

[0105] Specifically, the preset transitional season working condition can include a preset winter date range and temperature range, and the transitional season working condition can be set according to actual conditions, which is not limited in the application.

[0106] In order to maintain the indoor positive pressure, in an embodiment of the application, the indirect evaporative cooling unit control method further comprises: collecting pressure data of the indoor, and discharging the second indoor return air outside according to the pressure data of the indoor.

[0107] Specifically, the indoor return air sent into the air-air heat exchanger can be determined as the first indoor return air, and the indoor return air directly discharged outside can be determined as the second indoor return air.

[0108] In order to further illustrate the scheme, the application provides an application example of the indirect evaporative cooling unit control method with fresh air humidification. In the application example, the outdoor fresh air and the indoor return air are both divided into two parts, which are defined as the first outdoor fresh air and the second outdoor fresh air, and the first indoor return air and the second indoor return air. The first outdoor fresh air is sprayed in the spraying chamber, and then exchanges heat with the first indoor return air in the air-air heat exchanger. The first outdoor fresh air is discharged outside after heat exchange. The second outdoor fresh air is sprayed in the spraying chamber, and then mixed with the processed first indoor return air in the mixing chamber. After meeting the indoor temperature and humidity requirements, the second outdoor fresh air is sent into the indoor. The second indoor return air is directly discharged outside. The specific description is as follows:

[0109] (1) In summer, the first outdoor fresh air is sprayed in the spraying chamber, and then exchanges heat with the first indoor return air in the air-air heat exchanger. The first outdoor fresh air is discharged outside after heat exchange. If the processed first indoor return air meets the indoor supply air temperature and humidity requirements, the second outdoor fresh air is sprayed in the spraying chamber to meet the indoor supply air temperature and humidity requirements. After that, the second outdoor fresh air is mixed with the processed first indoor return air in the mixing chamber and then sent into the indoor. If the processed first indoor return air cannot meet the indoor supply air temperature and humidity requirements, the compressor is started, and the four-way valve is adjusted so that the first heat exchange coil is a refrigeration coil (evaporator). The water temperature in the spraying chamber is lowered, so that the second outdoor fresh air is cooled and dehumidified after being sprayed, and then mixed with the processed first indoor return air in the mixing chamber to meet the indoor requirements. In addition, according to the indoor positive pressure condition, the amount of the second indoor return air discharged outside is adjusted to maintain the positive pressure of the machine room.

[0110] (2) In winter, the first outdoor fresh air does not need to be sprayed, and is directly exchanged with the first indoor return air in the air-air heat exchanger, and the first outdoor fresh air after heat exchange is discharged to the outdoor. If the first indoor return air after treatment can meet the indoor supply air humidity requirement, the second outdoor fresh air is sprayed in the spraying chamber to meet the indoor supply air temperature and humidity requirement, and then mixed with the first indoor return air after treatment in the mixing chamber and sent to the indoor. If the first indoor return air after treatment cannot meet the indoor supply air humidity requirement, the compressor is started, the four-way valve is adjusted so that the first heat exchange coil is a heating coil (evaporator), the spraying chamber water temperature is raised, and the second outdoor fresh air is heated and humidified after spraying, and then mixed with the first indoor return air after treatment in the mixing chamber to meet the indoor requirement. In addition, according to the indoor positive pressure condition, the amount of second indoor return air discharged to the outdoor is adjusted to maintain the positive pressure of the machine room.

[0111] (3) In the transition season, the first outdoor fresh air does not need to be sprayed, and is directly exchanged with the first indoor return air in the air-air heat exchanger, and the first outdoor fresh air after heat exchange is discharged to the outdoor. The second outdoor fresh air does not need to be sprayed, and is directly mixed with the first indoor return air after treatment in the mixing chamber and sent to the indoor. In addition, according to the indoor positive pressure condition, the amount of second indoor return air discharged to the outdoor is adjusted to maintain the positive pressure of the machine room.

[0112] From the software level, in order to improve the reliability of the indirect evaporative cooling unit control, and then meet the indoor fresh air demand and realize temperature and humidity regulation, the present application provides an embodiment of an indirect evaporative cooling unit control device for realizing all or part of the contents of the indirect evaporative cooling unit control method, see Figure 8 , The indirect evaporative cooling unit control device specifically includes the following contents:

[0113] The judgment module 01 is used for sending the first outdoor fresh air to the spraying chamber, obtaining the current working condition, judging whether the current working condition belongs to the preset summer working condition, if yes, controlling the spraying chamber to spray the first outdoor fresh air, and after monitoring and determining that the first outdoor fresh air meets the preset first temperature and humidity condition, transmitting the sprayed first outdoor fresh air to the air-air heat exchanger;

[0114] The monitoring module 02 is used for sending the first indoor return air to the air-air heat exchanger to exchange with the first outdoor fresh air, and if it is monitored and determined that the first indoor return air after heat exchange meets the temperature and humidity condition corresponding to the preset summer working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged to the outdoor.

[0115] The control module 03 is used for sending the second outdoor fresh air to the spraying chamber, controlling the spraying chamber to spray the second outdoor fresh air, and after the second outdoor fresh air meets the preset second temperature and humidity condition, transmitting the sprayed second outdoor fresh air to the mixing chamber.

[0116] Output module 04 is used to mix the second outdoor fresh air and the first indoor return air in the mixing chamber and then send them into the room.

[0117] The embodiments of the indirect evaporative cooling unit control device provided in this specification can be used to execute the processing flow of the embodiments of the above-described indirect evaporative cooling unit control method. Its functions will not be repeated here, but can be referred to the detailed description of the embodiments of the above-described indirect evaporative cooling unit control method.

[0118] From a hardware perspective, in order to improve the reliability of the control of the indirect evaporative cooling unit and thus meet the indoor fresh air demand and achieve temperature and humidity regulation, this application provides an embodiment of an electronic device for implementing all or part of the control method of the indirect evaporative cooling unit. The electronic device specifically includes the following components:

[0119] The system comprises a processor, memory, a communications interface, and a bus; wherein the processor, memory, and communications interface communicate with each other via the bus; the communications interface is used to realize information transmission between the indirect evaporative cooling unit control device and related devices such as user terminals; the electronic device can be a desktop computer, tablet computer, or mobile terminal, etc., and this embodiment is not limited to these. In this embodiment, the electronic device can be implemented with reference to the embodiments for implementing the indirect evaporative cooling unit control method and the embodiments for implementing the indirect evaporative cooling unit control device, the contents of which are incorporated herein by reference, and repeated details will not be described again.

[0120] Figure 9 This is a schematic block diagram illustrating the system configuration of the electronic device 9600 according to an embodiment of this application. Figure 9 As shown, the electronic device 9600 may include a central processing unit 9100 and a memory 9140; the memory 9140 is coupled to the central processing unit 9100. It is worth noting that... Figure 9 This is an example; other types of structures can also be used to supplement or replace this structure to achieve telecommunications functions or other functions.

[0121] In one or more embodiments of this application, the control function of the indirect evaporative cooling unit can be integrated into the central processing unit 9100. The central processing unit 9100 can be configured to perform the following control:

[0122] Step 101: send the first outdoor fresh air into the spraying chamber, obtain the current working condition, determine whether the current working condition belongs to the preset summer working condition, if yes, control the spraying chamber to spray the first outdoor fresh air, and after monitoring and determining that the first outdoor fresh air after spraying meets the preset first temperature and humidity condition, transmit the first outdoor fresh air after spraying to the air-air heat exchanger;

[0123] Step 102: send the first indoor return air into the air-air heat exchanger to exchange heat with the first outdoor fresh air, if monitoring and determining that the first indoor return air after heat exchange meets the temperature and humidity condition corresponding to the preset summer working condition, transmit the first indoor return air to the mixing chamber, and discharge the first outdoor fresh air outdoors;

[0124] Step 103: send the second outdoor fresh air into the spraying chamber, control the spraying chamber to spray the second outdoor fresh air, and after the second outdoor fresh air meets the preset second temperature and humidity condition, transmit the second outdoor fresh air after spraying to the mixing chamber;

[0125] Step 104: send the second outdoor fresh air and the first indoor return air mixed in the mixing chamber into the indoor.

[0126] From the above description, it can be known that the electronic device provided by the embodiment of the application can improve the reliability of the indirect evaporative cooling unit control, thereby meeting the indoor fresh air demand and realizing temperature and humidity regulation.

[0127] In another embodiment, the indirect evaporative cooling unit control device can be configured separately from the central processor 9100, for example, the indirect evaporative cooling unit control device can be configured as a chip connected with the central processor 9100, and the indirect evaporative cooling unit control function is realized through the control of the central processor.

[0128] As shown in Figure 9 , the electronic device 9600 can further include a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It should be noted that the electronic device 9600 does not necessarily include all the components shown in Figure 9 ; in addition, the electronic device 9600 can further include components not shown in Figure 9 , which can be referred to the prior art.

[0129] As shown in Figure 9 , the central processor 9100 is also sometimes referred to as a controller or an operation control, which can include a microprocessor or other processor device and / or a logic device, the central processor 9100 receives input and controls the operation of each component of the electronic device 9600.

[0130] The memory 9140, for example, can be one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. The above-mentioned information related to failure can be stored, and in addition, a program for executing the information related to failure can be stored. The central processing unit 9100 can execute the program stored in the memory 9140 to achieve information storage or processing, and the like.

[0131] The input unit 9120 provides input to the central processing unit 9100. The input unit 9120 is, for example, a key or a touch input device. The power supply 9170 is used to supply power to the electronic device 9600. The display 9160 is used to display display objects such as images and characters. The display can be, for example, an LCD display, but is not limited thereto.

[0132] The memory 9140 can be a solid state memory such as a read only memory (ROM), a random access memory (RAM), a SIM card, and the like. It can also be a memory that retains information even when power is off, can be selectively erased, and is provided with more data, and examples of such a memory are sometimes referred to as an EPROM, and the like. The memory 9140 can also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 can include an application / function storage section 9142 for storing application programs and function programs or for storing a flow for executing operations of the electronic device 9600 by the central processing unit 9100.

[0133] The memory 9140 can also include a data storage section 9143 for storing data such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. A driver storage section 9144 of the memory 9140 can include various drivers of the electronic device for a communication function and / or for executing other functions of the electronic device such as a messaging application, an address book application, and the like.

[0134] The communication module 9110 is a transmitter / receiver 9110 that transmits and receives signals via an antenna 9111. The communication module (transmitter / receiver) 9110 is coupled to the central processing unit 9100 to provide input signals and receive output signals, which can be the same as in the case of a conventional mobile communication terminal.

[0135] Based on different communication technologies, multiple communication modules 9110, such as a cellular network module, a Bluetooth module, and / or a wireless local area network module, etc., can be provided in the same electronic device. The communication module (transmitter / receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and to receive audio input from the microphone 9132, thereby enabling typical telecommunication functions. The audio processor 9130 can include any suitable buffers, decoders, amplifiers, etc. In addition, the audio processor 9130 is coupled to the central processor 9100, thereby enabling the recording of sounds on the local device via the microphone 9132 and enabling the playing of sounds stored on the local device via the speaker 9131.

[0136] As described above, the electronic device provided by the embodiments of the present application can improve the reliability of indirect evaporative cooling unit control, thereby meeting the indoor fresh air demand and achieving temperature and humidity regulation.

[0137] The embodiments of the present application also provide a computer readable storage medium capable of implementing all steps of the indirect evaporative cooling unit control method in the above embodiments. The computer readable storage medium stores a computer program. When the processor executes the computer program, all steps of the indirect evaporative cooling unit control method in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0138] Step 101: send the first outdoor fresh air into the spraying chamber, obtain the current working condition, determine whether the current working condition belongs to the preset summer working condition, if yes, control the spraying chamber to spray the first outdoor fresh air, and after monitoring that the first outdoor fresh air meets the preset first temperature and humidity condition, transmit the sprayed first outdoor fresh air to the air-air heat exchanger;

[0139] Step 102: send the first indoor return air into the air-air heat exchanger to exchange heat with the first outdoor fresh air, if monitoring that the first indoor return air after heat exchange meets the temperature and humidity condition corresponding to the preset summer working condition, transmit the first indoor return air to the mixing chamber, and discharge the first outdoor fresh air outdoors;

[0140] Step 103: send the second outdoor fresh air into the spraying chamber, control the spraying chamber to spray the second outdoor fresh air, and after the second outdoor fresh air meets the preset second temperature and humidity condition, transmit the sprayed second outdoor fresh air to the mixing chamber;

[0141] Step 104: send the second outdoor fresh air and the first indoor return air mixed in the mixing chamber into the indoor.

[0142] From the above description, the computer readable storage medium provided by the embodiment of the application can improve the reliability of indirect evaporative cooling unit control, and further meet the indoor fresh air demand and realize temperature and humidity regulation.

[0143] The embodiments of the method described in the application are described in a progressive manner, and the same or similar parts of each embodiment can be referred to each other. Each embodiment mainly describes the difference from other embodiments. The related parts can be referred to the part of the method embodiment.

[0144] Those skilled in the art should understand that the embodiments of the application can be provided as a method, a system or a computer program product. Therefore, the application can be in the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the application can be in the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0145] The application is described with reference to flowcharts and / or block diagrams of the method, device (system) and computer program product according to the embodiments of the application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks can be implemented by computer program instructions. These computer program instructions can be provided to a general purpose computer, a special purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the computer or other programmable data processing device produce a device for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus for performing the functions specified in one or more flows and / or blocks.

[0146] These computer program instructions can also be stored in a computer readable storage medium that can guide the computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer readable storage medium produce a product including instruction apparatus, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus for performing the functions specified in one or more flows and / or blocks.

[0147] These computer program instructions can also be loaded into a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer implemented process, so that the instructions executed on the computer or other programmable device provide a process for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 Figure 1steps of the functions specified in the block or blocks.

[0148] The principles and implementation manners of the present application are described in the embodiments in the present application. The above embodiment descriptions are only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application scopes will be changed. In summary, the content of the present description should not be understood as a limitation of the present application.

Claims

1. An indirect evaporative chiller unit with fresh air humidification, characterized in that, Comprise: The shell, the air-to-air heat exchanger arranged in the shell, the spray chamber and the mixing chamber; wherein, The air-to-air heat exchanger is communicated with the spray chamber, the mixing chamber, the indoor and the outdoor respectively, and the spray chamber is communicated with the mixing chamber and the outdoor respectively; The spray chamber is used for adjusting the humidity and temperature of outdoor fresh air, the air-to-air heat exchanger is used for heat exchange of outdoor fresh air and indoor return air, and the mixing chamber is used for mixing outdoor fresh air and indoor return air; Wherein, the indirect evaporative cooling unit further comprises: a compressor arranged in the shell, a four-way reversing valve, an expansion valve, and a second heat exchange coil arranged between the air-to-air heat exchanger and the mixing chamber, and the spray chamber comprises: a water pan and a first heat exchange coil arranged in the water pan; The four-way reversing valve is connected with the compressor, the first heat exchange coil and the second heat exchange coil respectively, and the first heat exchange coil is connected with the second heat exchange coil through the expansion valve.

2. The indirect evaporative cooling unit of claim 1, wherein, Further comprise: The exhaust fan arranged between the air-to-air heat exchanger and the mixing chamber and the supply fan arranged between the air-to-air heat exchanger and the mixing chamber.

3. The indirect evaporative cooling unit of claim 1, wherein, Further comprise: The first temperature acquisition device arranged in the air-to-air heat exchanger, the first humidity acquisition device, the second temperature acquisition device arranged in the spray chamber and the second humidity acquisition device.

4. An indirect evaporative chiller unit control method with fresh air humidification, characterized in that, Applied to the indirect evaporative cooling unit of any one of claims 1 to 3, comprising: The first outdoor fresh air is sent into the spray chamber, the current working condition is obtained, it is judged whether the current working condition belongs to the preset summer working condition, if yes, the spray chamber is controlled to spray the first outdoor fresh air, after monitoring and determining that the first outdoor fresh air meets the preset first temperature and humidity condition, the sprayed first outdoor fresh air is transmitted to the air-to-air heat exchanger; The first indoor return air is sent into the air-to-air heat exchanger to exchange heat with the first outdoor fresh air, if monitoring and determining that the first indoor return air after heat exchange meets the temperature and humidity condition corresponding to the preset summer working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged to the outdoor; The second outdoor fresh air is sent into the spray chamber, the spray chamber is controlled to spray the second outdoor fresh air, after the second outdoor fresh air meets the preset second temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber; The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the indoor.

5. The indirect evaporative cooling unit control method of claim 4, wherein, After the first indoor return air is sent into the air-to-air heat exchanger to exchange heat with the first outdoor fresh air, further comprising: If monitoring and determining that the first indoor return air after heat exchange does not meet the temperature and humidity condition corresponding to the preset summer working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged to the outdoor; The second outdoor fresh air is sent into the spray chamber, the spray chamber is controlled to spray the second outdoor fresh air, after monitoring and determining that the second outdoor fresh air meets the preset third temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber; The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the indoor.

6. The indirect evaporative cooling unit control method of claim 5, wherein, The control controls the spraying room to spray the second outdoor fresh air, and after monitoring that the second outdoor fresh air meets the preset third temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber. The compressor is controlled to be turned on, and the refrigerant is compressed into a high-temperature and high-pressure gas, which enters the first heat exchange coil to exchange heat, the first heat exchange coil is cooled, and the high-temperature and high-pressure gas is converted into a high-temperature and high-pressure liquid, the high-temperature and high-pressure liquid is converted into a low-temperature and low-pressure liquid through an expansion valve, the low-temperature and low-pressure liquid enters the second heat exchange coil to be converted into a low-temperature and low-pressure gas, and enters the compressor, so that the liquid in the water pan is cooled after the first heat exchange coil is cooled, and the cooled liquid is used to spray the second outdoor fresh air; After monitoring that the second outdoor fresh air meets the preset third temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber.

7. The indirect evaporative cooling unit control method of claim 4, wherein, After the current working condition is acquired, further comprising: If the current working condition is the preset winter working condition, the first outdoor fresh air is transmitted to the air-air heat exchanger; The first indoor return air is sent into the air-air heat exchanger to exchange heat with the first outdoor fresh air, and if it is monitored that the first indoor return air after heat exchange meets the temperature and humidity condition corresponding to the preset winter working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged outdoors; The second outdoor fresh air is sent into the spraying room, and the spraying room is controlled to spray the second outdoor fresh air, and after monitoring that the second outdoor fresh air meets the preset fourth temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber; The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the room.

8. The indirect evaporative cooling unit control method of claim 7, wherein, Further comprising: If it is monitored that the first indoor return air after heat exchange does not meet the temperature and humidity condition corresponding to the preset winter working condition, the first indoor return air is transmitted to the mixing chamber, and the first outdoor fresh air is discharged outdoors; The second outdoor fresh air is sent into the spraying room, and the spraying room is controlled to spray the second outdoor fresh air, and after monitoring that the second outdoor fresh air meets the preset fifth temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber; The second outdoor fresh air and the first indoor return air are mixed in the mixing chamber and then sent into the room.

9. The indirect evaporative cooling unit control method of claim 8, wherein, The control controls the spraying room to spray the second outdoor fresh air, and after monitoring that the second outdoor fresh air meets the preset third temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber, comprising: The compressor is controlled to be turned on to compress refrigerant into high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the second heat exchange coil to be cooled and converted into high-temperature and high-pressure liquid, the high-temperature and high-pressure liquid is converted into low-temperature and low-pressure liquid by an expansion valve, the low-temperature and low-pressure liquid enters the first heat exchange coil to be converted into low-temperature and low-pressure gas and the first heat exchange coil is heated, the low-temperature and low-pressure gas enters the compressor to heat the liquid in the water pan after the first heat exchange coil is heated, and the second outdoor fresh air is sprayed by the heated liquid. After it is determined that the second outdoor fresh air meets the preset fifth temperature and humidity condition, the sprayed second outdoor fresh air is transmitted to the mixing chamber.

10. The indirect evaporative cooling unit control method of claim 4, wherein, After the current working condition is obtained, the method further comprises: determining whether the current working condition is a preset transition season working condition, if yes, transmitting the first outdoor fresh air to the air-to-air heat exchanger through the spraying chamber; sending the first indoor return air into the air-to-air heat exchanger to exchange heat with the first outdoor fresh air; transmitting the first indoor return air after heat exchange to the mixing chamber and discharging the first outdoor fresh air after heat exchange to the outside; transmitting the second outdoor fresh air to the mixing chamber through the spraying chamber, and sending the second outdoor fresh air and the first indoor return air into the indoor after the second outdoor fresh air and the first indoor return air are mixed in the mixing chamber.

11. The indirect evaporative cooling unit control method of claim 4, wherein, The method further comprises: collecting pressure data of the indoor, and discharging the second indoor return air to the outside according to the pressure data of the indoor.

12. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the program to implement the indirect evaporative cooling unit control method of any one of claims 4 to 11.

13. A computer readable storage medium having stored thereon computer instructions, wherein, The instructions are executed by the processor to implement the indirect evaporative cooling unit control method of any one of claims 4 to 11.

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