CN115413197A

CN115413197A - Indirect evaporative cooling unit, control method and storage medium

Info

Publication number: CN115413197A
Application number: CN202211043539.6A
Authority: CN
Inventors: 卫鹏云; 骆明波; 刘文登; 郑亚军
Original assignee: Midea Group Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-29

Abstract

The application provides an indirect evaporative cooling unit, a control method and a storage medium. The indirect evaporative cooling unit is arranged in the machine room and comprises a compression refrigeration mechanism and a refrigeration water mechanism. The compression refrigeration mechanism comprises a compressor, a condenser, an evaporator and a second throttling element; the compressor is used for compressing and driving refrigerant; the condenser is communicated with the compressor through a pipeline; the evaporator is communicated with the compressor through a pipeline; the second throttling element is respectively communicated with the condenser and the evaporator through pipelines and is used for selectively conveying the refrigerant output by the condenser to the evaporator; the cooling water mechanism is communicated with the compressor and the condenser through pipelines so as to utilize the refrigerant output from the condenser to exchange heat with the cooling liquid to produce cooling water. The indirect evaporative cooling unit that this application provided can make cold water, satisfies the computer lab to the demand of refrigerated water.

Description

Indirect evaporative cooling unit, control method and storage medium

Technical Field

The present disclosure relates to data center air conditioning control technologies, and in particular, to an indirect evaporative cooling unit, a control method, and a storage medium.

Background

In the existing data center cooling technology, the cooling energy consumption is high and accounts for about 30% of the total cooling energy consumption of the data center. Indirect evaporative cooling is widely used in the industry because the indirect evaporative cooling technology mainly utilizes dry air for refrigeration to realize high-energy-efficiency cooling of data centers. Some problems also exist in the application process and need to be solved urgently, and the requirement of a machine room for chilled water needs to be considered.

Disclosure of Invention

The application provides an indirect evaporative cooling unit, a control method and a storage medium, which can solve the technical problem of the requirement of a machine room on cold water.

In order to solve the technical problem, the application adopts a technical scheme that: the indirect evaporative cooling unit is arranged in a machine room and comprises a compression refrigeration mechanism and a refrigeration water mechanism. The compression refrigeration mechanism comprises a compressor, a condenser, an evaporator and a second throttling element; the compressor is used for compressing and driving refrigerant; the condenser is communicated with the compressor through a pipeline; the evaporator is communicated with the compressor through a pipeline; the second throttling element is respectively communicated with the condenser and the evaporator through pipelines and is used for selectively conveying the refrigerant output by the condenser to the evaporator; the cooling water mechanism is communicated with the compressor and the condenser through pipelines so as to utilize the refrigerant output from the condenser to exchange heat with the cooling liquid to produce cooling water.

In order to solve the technical problem, the other technical scheme adopted by the application is as follows: providing a control method of an indirect evaporative cooling unit, wherein the control method is used for the indirect evaporative cooling unit; the control method comprises the following steps: acquiring environmental information of a machine room; and based on the environmental information, controlling the compressor, the condenser and the refrigerating mechanism to refrigerate cold water, and selectively controlling the evaporator and the second throttling piece to open the refrigerating wind.

In order to solve the above technical problem, the present application adopts another technical solution: there is provided a storage medium storing a computer program executable by a processor to implement the above-described control method.

The beneficial effect of this application is: the indirect evaporative cooling unit is provided with a refrigerating water mechanism for refrigerating water, and is respectively communicated with the compressor and the second electronic expansion valve through pipelines by the condenser, and the evaporator is respectively communicated with the second throttling element and the compressor through pipelines to form a compression refrigerating mechanism with refrigerant circulation, so that refrigeration can be realized. By the mode, the refrigerating water mechanism can refrigerate water for the machine room; furthermore, the second throttling element and the condenser are selectively controlled to open the refrigerating air, so that the air supply temperature of the machine room can be adjusted.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic structural diagram of an embodiment of an indirect evaporative cooling unit provided herein;

FIG. 2 is a schematic flow chart diagram illustrating an embodiment of a method for controlling an indirect evaporative cooling unit provided herein;

FIG. 3 is a schematic flow chart diagram of another embodiment of the steps of a control method of an indirect evaporative cooling unit;

FIG. 4 is a schematic flow chart illustrating an embodiment of step S120 of the indirect evaporative cooling unit control method of FIG. 2;

FIG. 5 is a schematic flow chart of another embodiment of step S120 of the control method of the indirect evaporative cooling unit of FIG. 2;

FIG. 6 is a schematic flow chart of a further embodiment of step S120 of the control method of the indirect evaporative cooling unit of FIG. 2;

FIG. 7 is a schematic flow chart diagram illustrating a step S120 of the indirect evaporative cooling unit control method of FIG. 2;

fig. 8 is a schematic structural diagram of an embodiment of a storage medium provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present application, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The indirect evaporative cooling unit provided by the present application is arranged in a machine room, and referring to fig. 1, fig. 1 is a schematic structural view of an embodiment of the indirect evaporative cooling unit provided by the present application. As shown in fig. 1, the indirect evaporative cooling unit 10 includes a compression refrigeration mechanism 140 and a refrigeration water mechanism 160. Wherein the compression refrigeration mechanism 140 includes a compressor 141, a condenser 142, an evaporator 144, and a second throttling member 143. The compressor 141 is used to compress a driving refrigerant. The condenser 142 communicates with the compressor 141 through a pipe. The evaporator 144 is in communication with the compressor 141 via a line. The second throttling element 143 is in communication with the condenser 142 and the evaporator 144, respectively, by a line for selectively delivering refrigerant from the condenser 142 to the evaporator 144. The second throttle member may be an electronic expansion valve, a thermal expansion valve, or the like, and the second throttle member may be controlled by the controller to control the closing of the second throttle member and to adjust the output amount of the refrigerant in the second throttle member.

The cooling water mechanism 160 communicates with the compressor 141 and the condenser 142 via pipes, and cools water by exchanging heat between the refrigerant output from the condenser 142 and the coolant.

The indirect evaporative cooling unit 10 can refrigerate by providing the refrigeration water mechanism 160 to refrigerate water, providing the compression refrigeration mechanism 140 in which the condenser 142 is in communication with the compressor 141 and the second throttle 143 via pipes, and the evaporator 144 is in communication with the second throttle 143 and the compressor 141 via pipes, respectively, to circulate a refrigerant. In this way, the water refrigerating mechanism 160 can refrigerate water to provide chilled water for the machine room; further, the second throttling element 143 and the condenser 142 are selectively controlled to open the cooling air, so that the air supply temperature of the machine room can be adjusted.

Optionally, the cooling and water mechanism 160 includes a first throttling member 162 and a heat exchanger 161. The first orifice 162 communicates with the condenser 142 through a pipe. The heat exchanger 161 is in communication with the first throttle 162 and the compressor 141 through pipes, respectively, to exchange heat with the coolant by the refrigerant output from the first throttle 162.

The refrigeration water mechanism 160 can control the flow of the refrigerant entering the heat exchanger 161 through the first throttling piece 162 according to the demands of the machine room for different temperatures of chilled water by setting the first throttling piece 162, thereby controlling the degree of heat exchange between the refrigerant and the cooling liquid and further controlling the temperature of the chilled water.

Optionally, the heat exchanger 161 includes a cooling medium passage (not shown) and a cooling liquid passage (not shown), and the cooling medium passage and the cooling liquid passage are disposed adjacent to each other. One end of the refrigerant passage is communicated with the first throttle 162 through a pipe, and the other end of the refrigerant passage is communicated with the compressor 141 through a pipe. The first throttle member may be a throttle member such as an electronic expansion valve and a thermal expansion valve, and the first throttle member may be controlled by the controller to control closing of the first throttle member and to adjust an output dosage of the refrigerant in the first throttle member. When the condenser 142 discharges the refrigerant to the first throttle 162, the refrigerant may be selectively discharged to the heat exchanger 161, and the refrigerant enters the refrigerant passage along the pipeline, and the refrigerant passage mainly passes the refrigerant output from the condenser 142. The cooling liquid passage comprises an input end and an output end and is mainly filled with cooling liquid. The coolant liquid gets into heat exchanger 161 through the input of coolant liquid passageway, and the refrigerant in the adjacent refrigerant passageway carries out the heat exchange to the coolant liquid, reduces the temperature of coolant liquid, makes the coolant liquid convert the refrigerated water into, and the refrigerated water passes through the output discharge heat exchanger 161 of coolant liquid passageway, provides the refrigerated water for the computer lab.

The heat exchanger 161 is through setting up adjacent refrigerant route and coolant liquid route, and when the refrigerant got into the refrigerant route, the cold source that utilizes the refrigerant carries out the heat exchange to the coolant liquid in the coolant liquid route, converts the coolant liquid into the refrigerated water, provides the refrigerated water for the computer lab to make indirect evaporative cooling unit 10 adapt to the demand of different computer lab to the refrigerated water.

Optionally, the indirect evaporative cooling unit 10 further includes a heat exchange core 110, an outdoor side fan 120 and an indoor side fan 130. The heat exchange core 110 mainly comprises a first air duct and a second air duct, and outdoor fresh air and indoor return air respectively flow through the two air ducts of the heat exchange core 110 and perform heat exchange. The first air duct is provided with a first air port and a second air port; the second air duct is provided with a third air opening and a fourth air opening. The first air port can be communicated with the external environment, and outdoor air can enter the first air duct through the first air port, namely the first air port is mainly used for introducing outdoor fresh air; the second air opening can discharge outdoor fresh air which completes heat exchange in the first air channel out of the first air channel. The third air inlet can be communicated with the machine room and can be used for introducing indoor return air; the fourth air port is mainly used for discharging indoor return air which completes heat exchange in the second air duct.

The outdoor side fan 120 is disposed between the first air outlet and the second air outlet. When the outdoor fan 120 is turned on, the rate of introducing and discharging fresh air outside the chamber of the first air duct can be changed by adjusting the rotation speed of the outdoor fan 120. The indoor fan 130 is arranged close to the fourth air port, and when the rotating speed of the indoor fan 130 is adjusted, the introduction of return air in the second air channel can be changed in the same way, and the air supply rate to the machine room can be changed.

The compression refrigeration mechanism includes a compressor 141, a condenser 142, a second throttle 143, and an evaporator 144. The compressor 141 is a driven fluid machine that raises low-pressure gas into high-pressure gas, and sucks low-temperature and low-pressure refrigerant gas from a pipeline, compresses the refrigerant gas by driving a piston through the operation of a motor, and discharges the high-temperature and high-pressure refrigerant gas to provide power for a refrigeration cycle.

The condenser 142 is located between the outdoor fan 120 and the second air inlet, and is communicated with the compressor 141 through a pipeline. Wherein the condenser 142 can convert a gas or vapor to a liquid to transfer heat from the tubing to the air adjacent the tubing in a relatively rapid manner. The condenser 142 is operated to release heat, so the temperature of the condenser 142 is high and the heat dissipation affects the energy efficiency of indirect evaporative cooling. When the condenser 142 is in operation, the heat-exchanged outdoor fresh air exhausted from the second air port passes through the condenser 142, and takes away the heat of the condenser 142 to cool the condenser.

The evaporator 144 is disposed near the fourth tuyere and is communicated with the compressor 141 through a pipe. The evaporator 144 is operable to convert the liquid refrigerant to a gaseous refrigerant, which in turn exchanges heat with ambient air, evaporates, and absorbs heat. The heat-exchanged refrigerant is finally returned to the compressor 141 through a pipe.

The second throttle 143 is in communication with the condenser 142 and the evaporator 144, respectively, through pipes. The liquid refrigerant discharged from the condenser 142 passes through a second throttling element 143, and the second throttling element 143 may be used to selectively deliver the refrigerant output from the condenser 142 to the evaporator 144 according to the cooling wind demand.

The chilled water mechanism 160 includes a first throttle 162 and a heat exchanger 161. The first orifice 162 communicates with the condenser 142 through a pipe. The heat exchanger 161 is in communication with the first throttling part 162 and the compressor 141 through pipes, respectively, to exchange heat with the coolant by the refrigerant output from the first throttling part 162. Here, the heat exchanger 161 is further provided with a coolant that can enter and exit the heat exchanger 161, and the refrigerant can exchange heat with the coolant in the heat exchanger 161 to cool the coolant, so that the heat exchanger 161 can exchange heat with the coolant to produce cooling water by using the refrigerant output from the condenser 142. The refrigerant, having completed heat exchange with the coolant, is finally returned to the compressor 141 through a line, completing the entire cycle of the refrigerant.

Optionally, the indirect evaporative cooling unit 10 further includes a detection mechanism (not shown) and a control mechanism (not shown), and the detection mechanism is used for detecting environmental information. The control mechanism is respectively connected with the detection mechanism, the compressor 141, the condenser 142, the evaporator 144, the first throttling element 162 and the second throttling element 143; the control mechanism is used for controlling the compressor 141, the condenser 142, the evaporator 144, the first throttling element 162 and the second throttling element 143 to work based on the environmental information so as to adjust the air supply temperature of the machine room and control the refrigerating mechanism 160 to refrigerate water.

The detection mechanism can be used for detecting environmental information of the machine room, such as the temperature and the humidity of the machine room, the temperature and the humidity of outdoor air, namely outdoor fresh air entering the machine room, and the temperature and the humidity of indoor return air; temperature, humidity, etc. of the air supplied by the machine room.

The control mechanism may be connected to the outdoor side fan 120, the indoor side fan 130, the compressor 141, the condenser 142, the second throttle 143, the first throttle 162, and the evaporator 144, respectively. The control mechanism is configured to control the outdoor side fan 120, the indoor side fan 130, the condenser 142, the second throttle 143, the first throttle 162, and the evaporator 144 to operate based on the environmental information, so as to adjust the temperature and humidity of the air supplied by the machine room. The control mechanism may include a processor, which may also be referred to as a CPU (Central Processing Unit). The processor may be an integrated circuit chip having 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, discrete gate or transistor logic, discrete hardware components.

Optionally, the detection mechanism includes an outdoor air inlet wet bulb (not labeled), an outdoor air inlet dry bulb (not labeled), and an air supply detection assembly (not labeled). The outdoor air inlet wet bulb is mainly used for detecting the temperature of outdoor air inlet wet bulbs. The outdoor air inlet dry ball is mainly used for detecting the temperature of the outdoor air inlet dry ball. The air supply detection assembly is mainly used for detecting the air supply temperature of the machine room. The control mechanism can control the indirect evaporative cooling unit 10 to work in an optimal mode according to the obtained outdoor air inlet wet-bulb temperature, the outdoor air inlet dry-bulb temperature and the machine room air supply temperature, and the air supply temperature and humidity of the machine room are accurately adjusted.

The detection mechanism grasps the accurate temperature of outdoor fresh air and the air supply of the machine room by arranging the outdoor air inlet wet ball, the outdoor air inlet dry ball and the air supply detection assembly, so that the control mechanism controls the indirect evaporative cooling unit to work in an optimal mode, and the air supply temperature and humidity of the machine room are accurately adjusted.

When the machine room needs chilled water, the control mechanism can control the cooling water mechanism 160 to cool water. That is, the control means controls the compressor 141 to operate on low-temperature and low-pressure refrigerant gas and discharge high-temperature and high-pressure refrigerant gas; the refrigerant gas enters the condenser 142 along the pipeline, and the control mechanism controls the condenser 142 to convert the high-temperature and high-pressure refrigerant gas into liquid refrigerant; the liquid refrigerant passes through the second and

first restrictions

143 and 162, respectively, along the pipe; when the control mechanism controls the second throttling element 143 to open to discharge the refrigerant to the evaporator 144, the control mechanism controls the evaporator 144 to exchange heat between the cold source of the refrigerant and the indoor return air discharged from the fourth air port, so that the temperature of the indoor return air is reduced, namely the indoor return air is cooled; the refrigerant is converted from a liquid to a low-temperature and low-pressure gas, and returns to the compressor 141 along a pipe, completing the entire cycle of the refrigerant. When the refrigerant output from the condenser 142 enters the first throttling element 162 along the pipeline, the control mechanism controls the first throttling element 162 to be opened so that the refrigerant enters the heat exchanger 161, the refrigerant exchanges heat with the cooling liquid in the heat exchanger 161, the cooling liquid is cooled, and the refrigeration water is finished; the refrigerant, which has completed heat exchange with the coolant, finally returns to the compressor 141 along a line, completing the entire cycle of the refrigerant. The control mechanism controls the indoor side fan 130 and the outdoor side fan 120 to work, the outdoor side fan 120 can introduce outdoor fresh air into the first air channel through the first air opening, the indoor side fan 130 can introduce indoor return air into the second air channel through the third air opening, and then the outdoor fresh air and the indoor return air circulate in the first air channel and the second air channel of the heat exchange core 110 respectively, and heat exchange is completed. The outdoor fresh air after heat exchange is exhausted from the second air port to the first air channel, passes through the condenser 142, and takes away heat generated by the condenser 142 during operation, so as to reduce the temperature of the condenser 142, and finally the outdoor fresh air around the condenser 142 is exhausted out of the machine room by the outdoor fan 120. When the indoor return air which completes heat exchange in the second air duct passes through the evaporator 144, the evaporator 144 performs secondary cooling on the indoor return air, so that the indoor return air reaches the air supply temperature of the machine room and is sent into the machine room by the indoor side fan 130. That is, the control mechanism controls the outdoor fan 120, the indoor fan 130, the condenser 142 and the first throttling element 162 to work based on the environmental information, adjusts the temperature of the supply air in the machine room and provides chilled water for the machine room, and controls the second throttling element 143 to open and close to discharge the refrigerant into the evaporator 144, so that the evaporator 144 performs secondary cooling and humidification on the return air in the room, and further adjusts the temperature and humidity of the supply air in the machine room.

The indirect evaporative cooling unit 10 is provided with a heat exchange core 110, an outdoor side fan 120, an indoor side fan 130, a compression refrigeration mechanism 140 and a control mechanism; the heat exchange core 110 comprises a first air duct and a second air duct, the first air duct is provided with a first air port and a second air port, and the second air duct is provided with a third air port and a fourth air port; the outdoor fan 120 is disposed near the second air inlet; the indoor side fan 130 is disposed near the fourth air inlet; the compression refrigeration mechanism 140 includes a compressor 141, a condenser 142, a second throttling part 143, and an evaporator 144; the chilled water mechanism 160 includes a first throttle 162 and a heat exchanger 161; the compressor 141 is for compressing a driving refrigerant; the condenser 142 is positioned between the outdoor fan 120 and the second air inlet, and is communicated with the compressor 141 through a pipeline; the evaporator 144 is arranged close to the fourth air port and communicated with the compressor 141 through a pipeline; the second throttling member 143 is in communication with the condenser 142 and the evaporator 144, respectively, through pipes; the first throttle 162 is respectively communicated with the condenser 142 and the heat exchanger 161 through pipelines, and the heat exchanger 161 is respectively communicated with the first throttle 162 and the compressor 141 through pipelines; the control means is connected to the detection means, the outdoor fan 120, the indoor fan 130, the condenser 142, the second throttle 143, the first throttle 162, and the evaporator 144. Through the arrangement mode, the control mechanism controls the outdoor fan 120, the indoor fan 130, the compressor 141, the condenser 142 and the first throttling element 162 to work based on the environmental information so as to adjust the air supply temperature of the machine room and provide chilled water for the machine room; the second throttling element 143 and the evaporator 144 are further controlled to be opened, so that the indoor return air is subjected to secondary cooling and humidification, and the temperature and humidity of the supply air of the machine room are further adjusted.

Optionally, the indirect evaporative cooling unit 10 further comprises a spray mechanism 150. The spraying mechanism 150 is disposed near the heat exchange core 110 and connected to the control mechanism. When the spraying mechanism 150 works, cooling water is sprayed to the heat exchange core 110, and the heat of the heat exchange core 110 is taken away by the cooling water, so that the heat exchange core 110 is cooled.

When the air supply temperature and humidity of the machine room cannot meet the requirements, the control mechanism controls the spraying mechanism 150 to work, the spraying mechanism 150 sprays cooling water to the heat exchange core body 110, the temperature of the heat exchange core body 110 is reduced, and the humidity of the heat exchange core body 110 is increased. The outdoor fresh air and the indoor return air respectively circulate in the first air channel and the second air channel of the heat exchange core 110 to exchange heat; meanwhile, the heat exchange core 110 takes away heat of part of indoor return air and outdoor fresh air, and increases the humidity of the indoor return air, so that the air supply temperature and humidity of the machine room can be adjusted.

The indirect evaporative cooling unit 10 is provided with the spraying mechanism 150 close to the heat exchange core 110, when the air supply temperature and humidity of the machine room cannot meet the requirements, the control mechanism controls the spraying mechanism 150 to be opened, and the heat exchange core 110 is cooled and humidified, so that the indoor return air is cooled and humidified, and the air supply temperature and humidity of the machine room are adjusted.

The application also provides a control method of the indirect evaporative cooling unit 10, and the method is used for the indirect evaporative cooling unit 10. The execution body can be a control mechanism, a processing mechanism and the like. Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a control method of an indirect evaporative cooling unit provided in the present application. As shown in fig. 2, the method includes:

step S110: and acquiring environment information.

The environmental information can be detected by a detection mechanism provided with temperature and humidity sensors, such as the temperature and humidity of the machine room, the temperature and humidity of outdoor air, namely outdoor fresh air entering the machine room, and the temperature and humidity of indoor return air; temperature and humidity of air supplied by the machine room, and the like. The detection mechanism can further comprise an outdoor dry bulb and an outdoor wet bulb for air measurement, and an indoor dry bulb and an indoor wet bulb for detecting the air temperature and humidity of different areas in the machine room. The environmental information may include indoor inlet air dry bulb temperature, indoor inlet air wet bulb temperature, indoor return air dry bulb temperature, etc. The control mechanism can control the detection mechanism to detect the external or internal environment of the machine room, and the ambient temperature of the machine room is obtained.

Step S120: based on the environmental information, the compressor 141, the condenser 142 and the cooling water mechanism 160 are controlled to cool the water, and the evaporator 144 and the second throttling member 143 are selectively controlled to open the cooling wind.

Based on the acquired environmental information of the machine room, the refrigerant fluid can be generated by controlling the compression refrigeration mechanism 140 to work. That is, the compressor 141 is controlled to operate on the low-temperature and low-pressure refrigerant gas and discharge the high-temperature and high-pressure refrigerant gas; the refrigerant gas enters the condenser 142 along the line, and the condenser 142 converts the high-temperature and high-pressure refrigerant gas into a liquid refrigerant; the liquid refrigerant passes through the second throttling element 143 and the water cooling mechanism 160 along the pipeline respectively; when the second throttling element 143 is opened, the refrigerant can be discharged to the evaporator 144, the evaporator 144 exchanges heat between the cold source of the refrigerant and the air passing through the evaporator 144, that is, the refrigerant is cooled, and the refrigerant is also converted from liquid to low-temperature and low-pressure gas, and returns to the compressor 141 along a pipeline, thereby completing the whole cycle of the refrigerant. When the refrigerant output from the condenser 142 enters the cooling water mechanism 160 along the pipeline, the refrigerant exchanges heat with the cooling liquid to cool the cooling liquid, so as to cool the water; the refrigerant, which has completed heat exchange with the coolant, finally returns to the compressor 141 along a line, completing the entire cycle of the refrigerant.

The indirect evaporative cooling unit controls the refrigeration water mechanism 160 to refrigerate water according to the acquired environmental information, so that the requirement of the indirect evaporative cooling unit on chilled water is met; further, the second throttling element 143 and the evaporator 144 are selectively controlled to open the cooling air, so that the air supply temperature of the machine room can be adjusted.

Optionally, in order to adjust the supply air temperature more accurately, the indirect evaporative cooling unit further includes a control mechanism, an indoor side fan 130, an outdoor side fan 120, a detection mechanism, and a heat exchange core 110 provided with two air ducts; the first air duct is provided with a first air port and a second air port; the second air duct is provided with a third air opening and a fourth air opening. The detection mechanism is provided with an outdoor air inlet wet ball, an outdoor air inlet dry ball and an air supply detection assembly. The refrigerating water mechanism 160 includes a first throttling member 162 in communication with the condenser 142 through a pipe, and a heat exchanger 161 in communication with the first throttling member 162 and the compressor 141 through pipes, respectively; the heat exchanger 161 includes a refrigerant passage and a coolant passage that are disposed adjacent to each other. The detection mechanism is connected to the indoor fan 130, the outdoor fan 120, the detection mechanism, the first throttle 162, the compressor 141, the condenser 142, the second throttle 143, and the evaporator 144. Referring to fig. 3, fig. 3 is a flow chart illustrating another embodiment of the steps of the control method of the indirect evaporative cooling unit. As shown in fig. 3, the control method may further include the steps of:

step S130: in response to the outdoor inlet air wet bulb temperature being less than or equal to the first preset temperature and the machine room supply air temperature being less than or equal to the preset machine room supply air temperature, the indoor side fan 130 is controlled to be turned on to introduce the indoor return air into the second air duct.

The control mechanism controls the detection mechanism to obtain the temperature of the outdoor air inlet dry bulb, and the temperature of the outdoor air inlet dry bulb is compared with a first preset temperature. The first preset temperature refers to the switching temperature of the indirect evaporative cooling unit for adjusting refrigeration when the temperature of the outdoor fresh air wet bulb reaches a preset temperature value.

The control mechanism responds to the fact that the outdoor air inlet dry bulb temperature is smaller than or equal to the first preset temperature, the indoor side fan 130 is controlled to be turned on, indoor return air is led into the second air channel from the third air port, and then the indoor return air in the second air channel and outdoor fresh air entering the first air channel are subjected to heat exchange, so that the indoor return air temperature is reduced. And the cooled indoor return air is discharged from the fourth air port to the second air duct, and meanwhile, the cooled indoor return air is sent into the machine room by the indoor fan 130, so that the air supply temperature of the machine room is adjusted. Wherein, the control mechanism can reduce the rotating speed of the indoor side fan 130, thereby reducing the energy consumption of the indirect evaporative cooling unit 10.

Step S140: the outdoor fan 120 is controlled to be turned on to discharge the outdoor fresh air that has completed heat exchange out of the machine room.

The control mechanism controls the outdoor fan 120 to be opened, so that the heat exchanged outdoor fresh air exhausted from the second air port to the first air duct is exhausted out of the machine room. Wherein, the control mechanism can reduce the rotating speed of the outdoor fan 120, thereby reducing the energy consumption of the indirect evaporative cooling unit 10.

Referring to fig. 4, fig. 4 is a schematic flowchart illustrating an embodiment of step S120 of the indirect evaporative cooling unit control method in fig. 2, where the step S120 may include the following steps:

step S121: and in response to the outdoor inlet air wet bulb temperature being less than or equal to the first preset temperature and the machine room air supply temperature being less than or equal to the preset machine room air supply temperature, the evaporator 144 and the second throttling element 143 are controlled to be closed, and the cooling air is stopped.

The control mechanism controls the detection mechanism to acquire the outdoor air inlet dry bulb temperature and compares the outdoor air inlet dry bulb temperature with a first preset temperature. The first preset temperature refers to the switching temperature of the indirect evaporative cooling unit for adjusting refrigeration when the outdoor fresh air wet bulb temperature reaches a preset temperature value.

The control mechanism responds that the outdoor air inlet dry bulb temperature is less than or equal to a first preset temperature, the control mechanism controls the evaporator 144 and the second throttling element 143 to be closed, and the refrigeration air is stopped.

Step S122: the compressor 141, the condenser 142 and the first throttling member 162 are controlled to be opened to allow the refrigerant to enter the heat exchanger 161 to cool the cooling liquid.

The control mechanism controls the compressor 141 to work at low pressure, works on low-temperature low-pressure refrigerant gas, and discharges high-temperature high-pressure refrigerant gas; the refrigerant gas enters the condenser 142 along the pipeline, and the control mechanism controls the condenser 142 to convert the high-temperature and high-pressure refrigerant gas into liquid refrigerant; the liquid refrigerant enters the first and

second restrictions

162 and 143, respectively, along the line; the control mechanism controls the first throttling element 162 to be opened, the refrigerant is discharged to the heat exchanger 161, the refrigerant exchanges heat with the cooling liquid in the heat exchanger 161, the cooling liquid is cooled, the refrigerant liquid of the refrigeration mechanism 140 is compressed, and chilled water is provided for the machine room; the refrigerant, which has completed heat exchange with the coolant, finally returns to the compressor 141 along a line, completing the entire cycle of the refrigerant.

In this embodiment, the order of executing the steps does not affect the final effect, and thus the order of the steps is not specifically limited.

According to the control method of the indirect evaporative cooling unit, by setting the steps, the control mechanism controls the indoor side fan 130 and the outdoor side fan 120 to be turned on based on the dry bulb temperature of the obtained outdoor inlet air fresh air, and the indirect evaporative cooling unit only reduces indoor return air through the outdoor fresh air, so that air supply temperature regulation of a machine room is realized, the rotating speeds of the outdoor side fan 120 and the indoor side fan 130 are reduced, and energy consumption of the indirect evaporative cooling unit can be reduced.

Step S120 is to provide chilled water for the machine room by setting the above steps.

Optionally, in order to adjust the supply air temperature more accurately, the indirect evaporative cooling unit further includes a control mechanism, an indoor side fan 130, an outdoor side fan 120, a detection mechanism, and a heat exchange core 110 provided with two air ducts; the first air duct is provided with a first air port and a second air port; the second air duct is provided with a third air opening and a fourth air opening. The detection mechanism is provided with an outdoor air inlet wet ball, an outdoor air inlet dry ball and an air supply detection assembly. The refrigerating water mechanism 160 includes a first throttle 162 in communication with the condenser 142 through a pipe, and a heat exchanger 161 in communication with the first throttle 162 and the compressor 141 through pipes, respectively; the heat exchanger 161 includes a refrigerant passage and a coolant passage that are disposed adjacent to each other. The detection mechanism is connected to the indoor side fan 130, the outdoor side fan 120, the detection mechanism, the first throttle 162, the compressor 141, the condenser 142, the second throttle 143, and the evaporator 144, respectively. Referring to fig. 5, fig. 5 is a schematic flow chart of another embodiment of step S120 of the indirect evaporative cooling unit control method of fig. 2. As shown in fig. 5, step S120 may further include the steps of:

step S221: in response to the outdoor inlet air wet bulb temperature being less than or equal to the first preset temperature and the machine room supply temperature being greater than the preset machine room supply temperature, the indoor side fan 130 is controlled to be turned on to introduce the indoor return air into the second air duct.

The control mechanism obtains the outdoor air inlet wet bulb temperature and the machine room air supply temperature through the detection mechanism, compares the outdoor air inlet wet bulb temperature with a first preset temperature, and compares the machine room air supply temperature with the preset machine room air supply temperature.

And the control mechanism responds that the temperature of the outdoor inlet air wet bulb is less than or equal to the first preset temperature, and the temperature of the machine room air supply is greater than the preset temperature of the machine room air supply, the indoor side fan 130 is controlled to be opened, the indoor return air is introduced into the second air channel from the third air port, and then the indoor return air in the second air channel and the outdoor fresh air circulating in the first air channel are subjected to heat exchange, so that the temperature of the indoor return air is reduced. And the cooled indoor return air is discharged from the fourth air port to the second air duct, and meanwhile, the cooled indoor return air is sent into the machine room by the indoor fan 130, so that the air supply temperature of the machine room is adjusted. Wherein, the control mechanism can reduce the rotating speed of the indoor side fan 130, thereby reducing the energy consumption of the indirect evaporative cooling unit 10.

Step S222: the outdoor fan 120 is controlled to be turned on to discharge the outdoor fresh air having completed the heat exchange out of the machine room.

Step S223: the first throttling element 162 is controlled to be closed, the compressor 141 is controlled to operate at a low pressure, and the condenser 142 is controlled to be opened to change the refrigerant profile.

The control mechanism controls the compressor 141 to work at low pressure, works on low-temperature low-pressure refrigerant gas, and discharges high-temperature high-pressure refrigerant gas; the refrigerant gas enters the condenser 142 along the line, and the control mechanism controls the condenser 142 to convert the high-temperature, high-pressure refrigerant gas into a liquid refrigerant.

Step S224: the second throttling element 143 is controlled to be opened to allow the refrigerant to enter the evaporator 144.

The control mechanism controls the second restriction 143 to open to discharge the refrigerant discharged from the condenser 142 toward the evaporator 144 so that the refrigerant enters the evaporator 144 along a line.

Step S225: the evaporator 144 is controlled to operate to cool the indoor return air from the fourth air inlet.

The control mechanism controls the evaporator 144 to work, the cold source of the refrigerant is subjected to heat exchange with the indoor return air discharged from the fourth air port, and the indoor return air is subjected to secondary cooling, namely cooling air. The refrigerant is converted from a liquid to a low temperature and pressure gas, which is returned to the compressor 141 along a line, completing the entire cycle of the refrigerant.

Step S120 is realized by setting the steps, when the control mechanism obtains that the temperature of the outdoor air inlet wet bulb is smaller than or equal to a first preset temperature and the temperature of the machine room air inlet is larger than the preset machine room air supply temperature, the control mechanism controls the outdoor fan 120 and the indoor fan 130 to be opened, the outdoor fresh air is used for carrying out first cooling on the indoor return air, the control mechanism 140 controls the compression refrigeration mechanism 140 to carry out secondary cooling on the indoor return air and produce cold air so as to realize adjustment of the machine room air supply temperature by the outdoor fresh air and mechanical refrigeration, and meanwhile, the control mechanism controls the outdoor fan 120 and the indoor fan 130 to reduce the rotating speed and reduce the energy consumption of the indirect evaporation unit.

Optionally, in order to adjust the air supply temperature more accurately, the indirect evaporative cooling unit further includes a control mechanism, an indoor side fan 130, an outdoor side fan 120, a detection mechanism, and a heat exchange core 110 provided with two air ducts; the first air duct is provided with a first air port and a second air port; the second air duct is provided with a third air opening and a fourth air opening. The detection mechanism is provided with an outdoor air inlet wet ball, an outdoor air inlet dry ball and an air supply detection assembly. The refrigerating water mechanism 160 includes a first throttle 162 in communication with the condenser 142 through a pipe, and a heat exchanger 161 in communication with the first throttle 162 and the compressor 141 through pipes, respectively; the heat exchanger 161 includes a refrigerant passage and a coolant passage that are disposed adjacent to each other. The detection mechanism is connected to the indoor side fan 130, the outdoor side fan 120, the detection mechanism, the first throttle 162, the compressor 141, the condenser 142, the second throttle 143, and the evaporator 144, respectively. Referring to fig. 6, fig. 6 is a schematic flowchart of a step S120 of the indirect evaporative cooling unit control method of fig. 2 according to another embodiment. As shown in fig. 6, step S120 may further include the following steps:

step S321: in response to the outdoor inlet air wet bulb temperature being greater than the first preset temperature and the machine room air supply temperature being greater than the preset machine room air supply temperature, the indoor side fan 130 is controlled to be turned on to introduce the indoor return air into the second air duct.

The control mechanism obtains the outdoor air inlet dry bulb temperature and the machine room air supply temperature through the detection mechanism, compares the outdoor air inlet wet bulb temperature with a first preset temperature, and compares the machine room air supply temperature with the preset machine room air supply temperature.

The control mechanism responds that the temperature of the outdoor inlet air wet bulb is higher than the first preset temperature, the temperature of the machine room air supply is higher than the preset temperature of the machine room air supply, the indoor side fan 130 is controlled to be turned on, the indoor return air is led into the second air channel from the third air port, and then the indoor return air in the second air channel and the outdoor fresh air circulating in the first air channel are subjected to heat exchange, so that the temperature of the indoor return air is reduced. And the cooled indoor return air is discharged from the fourth air port to the second air duct, and meanwhile, the cooled indoor return air is sent into the machine room by the indoor fan 130, so that the air supply temperature of the machine room is adjusted. Wherein, the control mechanism can reduce the rotating speed of the indoor side fan 130, thereby reducing the energy consumption of the indirect evaporative cooling unit 10.

Step S322: the outdoor fan 120 is controlled to be turned on to discharge the outdoor fresh air having completed the heat exchange out of the machine room.

The control mechanism controls the outdoor fan 120 to be opened, so that the heat exchanged outdoor fresh air exhausted from the second air port to the first air duct is exhausted out of the machine room. Wherein, the control mechanism can reduce the rotating speed of the outdoor side fan 120, thereby reducing the energy consumption of the indirect evaporative cooling unit 10.

Step S323: the first throttling part 162 is controlled to be closed, the compressor 141 is controlled to be operated, and the condenser 142 is controlled to be opened, so that the form of the refrigerant is changed.

Step S324: the second throttling element 143 is controlled to be opened to allow the refrigerant to enter the evaporator 144.

Step S325: the evaporator 144 is controlled to operate to cool the indoor return air from the fourth air inlet.

In order to more accurately adjust the air supply temperature of the machine room, the indirect evaporative cooling unit further comprises a control mechanism, an indoor side fan 130, an outdoor side fan 120, a detection mechanism and a heat exchange core 110 provided with two air channels; the first air duct is provided with a first air port and a second air port; the second air duct is provided with a third air opening and a fourth air opening. The detection mechanism is provided with an outdoor air inlet wet ball, an outdoor air inlet dry ball and an air supply detection assembly. The refrigerating water mechanism 160 includes a first throttling member 162 in communication with the condenser 142 through a pipe, and a heat exchanger 161 in communication with the first throttling member 162 and the compressor 141 through pipes, respectively; the heat exchanger 161 includes a refrigerant passage and a coolant passage that are disposed adjacent to each other. The detection mechanism is connected to the indoor side fan 130, the outdoor side fan 120, the detection mechanism, the first throttle 162, the compressor 141, the condenser 142, the second throttle 143, and the evaporator 144, respectively. Referring to fig. 7, fig. 7 is a schematic flowchart of a step S120 of the indirect evaporative cooling unit control method of fig. 2 according to another embodiment. As shown in fig. 7, step S120 may further include the steps of:

step S421: and in response to the outdoor inlet air wet bulb temperature being higher than the first preset temperature and the machine room air supply temperature being lower than or equal to the preset machine room air supply temperature, the indoor side fan 130 is controlled to be turned on to introduce the indoor return air into the second air duct.

The control mechanism acquires the wet bulb temperature of outdoor inlet air and the air supply temperature of the machine room through the detection mechanism, and compares the wet bulb temperature of the outdoor inlet air with the first preset temperature, and compares the air supply temperature of the machine room with the preset air supply temperature of the machine room.

In response to the fact that the outdoor inlet air wet bulb temperature is higher than the first preset temperature and the machine room air supply temperature is lower than or equal to the preset machine room air supply temperature, the control mechanism controls the indoor side fan 130 to be turned on to introduce the indoor return air into the second air duct from the third air port, and then the indoor return air in the second air duct and the outdoor fresh air flowing in the first air duct are subjected to heat exchange, so that the indoor return air temperature is reduced. And the cooled indoor return air is discharged from the fourth air port to the second air duct, and meanwhile, the cooled indoor return air is sent into the machine room by the indoor fan 130, so that the air supply temperature of the machine room is adjusted. Wherein, the control mechanism can reduce the rotating speed of the indoor side fan 130, thereby reducing the energy consumption of the indirect evaporative cooling unit 10.

Step S422: the outdoor side fan 120 is turned on to discharge the fresh air outside the first air duct.

Step S423: the compressor 141 and the condenser 142 are controlled to be turned on to change the refrigerant state.

The control mechanism controls the compressor 141 to be started, works at low pressure, works on low-temperature and low-pressure refrigerant gas, and discharges high-temperature and high-pressure refrigerant gas; the refrigerant gas enters the condenser 142 along a line, and the control mechanism controls the condenser 142 to convert the high temperature, high pressure refrigerant gas to a liquid refrigerant.

Step S424: the second throttling element 143 and the evaporator 144 are controlled to be opened to produce cold air.

The control mechanism controls the second restriction 143 to open to discharge the refrigerant discharged from the condenser 142 toward the evaporator 144 so that the refrigerant enters the evaporator 144 along a line. The control mechanism controls the evaporator 144 to be opened, the cold source of the refrigerant is subjected to heat exchange with the indoor return air discharged from the fourth air port, and the indoor return air is subjected to secondary cooling, namely, cold air is produced. The refrigerant is converted from a liquid to a low temperature and pressure gas, which is returned to the compressor 141 along a line, completing the entire cycle of the refrigerant.

Step S425: the first throttling member 162 is controlled to be opened so that the refrigerant enters the heat exchanger 161 to cool the cooling liquid and make cold water.

The control mechanism controls the first throttling element 162 to be opened, the refrigerant is discharged to the heat exchanger 161, the refrigerant cools the cooling liquid in the heat exchanger 161 and exchanges heat with the cooling liquid, and the refrigeration of the refrigeration water mechanism 160 is completed; the refrigerant, which has completed heat exchange with the coolant, finally returns to the compressor 141 along a line, completing the entire cycle of the refrigerant.

In this embodiment, the order of the steps does not affect the final effect, and thus the order of the steps is not specifically limited.

Step S120, through the steps, the control mechanism obtains that the outdoor air inlet wet bulb temperature is higher than a second preset temperature, the machine room air supply temperature is lower than or equal to the preset machine room air supply temperature, the outdoor side fan 120 and the indoor side fan 130 are controlled to be turned on, the indoor return air is cooled for the first time through outdoor fresh air, the compression refrigeration mechanism 140 is controlled to cool the indoor return air for the second time, and cold air is produced to achieve the purposes that the outdoor fresh air and mechanical refrigeration adjust the machine room air supply temperature; and controlling the cooling water mechanism 160 to cool water to provide cooling water for the machine room; and meanwhile, the outdoor side fan 120 and the indoor side fan 130 are controlled to reduce the rotating speed, so that the energy consumption of the indirect evaporation unit is reduced.

The present application further provides a storage medium, and referring to fig. 8, fig. 8 is a schematic structural diagram of an embodiment of the storage medium provided in the present application. As shown in fig. 8, the storage medium 60 stores a computer program 610, and the computer program 610 can be executed by a processor to implement any one of the control modes in the above-described embodiments of the indirect evaporative cooling unit control method. For the purposes of this description, a storage medium 60 can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer storage medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

The indirect evaporative cooling unit 10 is provided with a heat exchange core 110, an outdoor side fan 120, an indoor side fan 130, a compression refrigeration mechanism 140 and a control mechanism; the heat exchange core 110 comprises a first air duct and a second air duct, the first air duct is provided with a first air port and a second air port, and the second air duct is provided with a third air port and a fourth air port; the outdoor fan 120 is disposed near the second air inlet; the indoor side fan 130 is disposed near the fourth air inlet; the compression refrigeration mechanism 140 includes a compressor 141, a condenser 142, a second throttle 143, an evaporator 144, and a heat exchanger 161; the compressor 141 is used to compress a driving refrigerant; the condenser 142 is positioned between the outdoor fan 120 and the second air inlet, and is communicated with the compressor 141 through a pipeline; the evaporator 144 is arranged close to the fourth air port and communicated with the compressor 141 through a pipeline; the second throttling member 143 is in communication with the condenser 142 and the evaporator 144, respectively, through pipes; the heat exchanger 161 is respectively communicated with the condenser 142 and the compressor 141 through pipelines; the control mechanism is connected to the outdoor fan 120, the indoor fan 130, the condenser 142, the second throttle 143, and the evaporator 144, respectively. Through the arrangement mode, the control mechanism controls the outdoor fan 120, the indoor fan 130, the compressor 141 and the condenser 142 to work based on the environmental information so as to adjust the air supply temperature of the machine room and provide chilled water for the machine room; the second throttling element 143 and the evaporator 144 are further controlled to be opened, so that the indoor return air is subjected to secondary cooling and humidification, and the temperature and humidity of the supply air of the machine room are further adjusted.

Wherein, heat exchanger 161 is through setting up adjacent refrigerant route and coolant liquid route, and when refrigerant got into the refrigerant route, the cold source that utilizes the refrigerant carries out the heat exchange to the coolant liquid in the coolant liquid route, converts the coolant liquid into the refrigerant liquid, provides the refrigerated water for the computer lab to make indirect evaporative cooling unit 10 adapt to different computer lab requirements.

Wherein, compression refrigeration mechanism 140 can be according to the demand of computer lab to different temperature refrigerated water through setting up first orifice 162, through the flow of the refrigerant of first orifice 162 control entering refrigerant passageway to control refrigerant and coolant heat exchange's degree, and then control the temperature of refrigerated water.

In the description of the present application, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like is intended to mean that a particular feature, mechanism, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, mechanisms, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing mechanisms, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device (e.g., a personal computer, server, network device, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions).

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure, which are directly or indirectly applied to other related technical fields, are included in the scope of the present disclosure.

Claims

1. The indirect evaporative cooling unit is characterized in that the indirect evaporative cooling unit is arranged in a machine room, and the indirect evaporative cooling unit comprises:

the compression refrigeration mechanism includes:

a compressor for compressing a driving refrigerant;

the condenser is communicated with the compressor through a pipeline;

the evaporator is communicated with the compressor through a pipeline;

the second throttling element is respectively communicated with the condenser and the evaporator through pipelines and is used for selectively conveying the refrigerant output by the condenser to the evaporator;

and a cooling water mechanism which is communicated with the compressor and the condenser through pipelines and used for cooling water by heat exchange between the refrigerant output from the condenser and cooling liquid.

2. The indirect evaporative cooling unit of claim 1, wherein the chilled water mechanism comprises:

the first throttling element is communicated with the condenser through a pipeline;

and the heat exchanger is respectively communicated with the first throttling element and the compressor through pipelines so as to exchange heat with cooling liquid by utilizing the refrigerant output from the first throttling element.

3. The indirect evaporative cooling unit of claim 1, further comprising:

the heat exchange core body comprises a first air duct and a second air duct, and the first air duct is provided with a first air port and a second air port; the second air duct is provided with a third air port and a fourth air port; the first air inlet is used for introducing outdoor fresh air, the third air inlet is used for introducing indoor return air, the second air inlet is used for discharging the outdoor fresh air in the first air channel, and the fourth air inlet is used for discharging the indoor return air in the second air channel;

the outdoor fan is arranged close to the second air port;

the indoor side fan is arranged close to the fourth air port;

the condenser is located between the outdoor fan and the second air port, and the evaporator is close to the fourth air port.

4. The indirect evaporative cooling unit of claim 2, wherein the heat exchanger comprises:

one end of the refrigerant passage is communicated with the first throttling element through a pipeline, and the other end of the refrigerant passage is communicated with the compressor through a pipeline and is introduced into a refrigerant output by the condenser;

a coolant passage through which coolant is introduced;

the refrigerant passage and the cooling liquid passage are arranged adjacently, so that the refrigerant output by the condenser exchanges heat with the cooling liquid to generate the refrigerant liquid.

5. The indirect evaporative cooling unit of claim 2, further comprising:

a detection mechanism for detecting environmental information;

the control mechanism is respectively connected with the detection mechanism, the compressor, the condenser, the evaporator, the first throttling element and the second throttling element;

the control mechanism is used for controlling the compressor, the condenser, the evaporator, the first throttling element and the second throttling element to work based on environmental information so as to adjust the air supply temperature and humidity of the machine room.

6. The indirect evaporative cooling unit of claim 5, wherein the detection mechanism comprises:

the outdoor air inlet wet bulb is used for detecting the temperature of the outdoor air inlet wet bulb;

the outdoor air inlet dry bulb is used for detecting the temperature of the outdoor air inlet dry bulb;

and the air supply detection assembly is used for detecting the air supply temperature of the machine room.

7. An indirect evaporative cooling unit control method, wherein the control method is used for the indirect evaporative cooling unit according to any one of claims 1 to 6, and the control method comprises the following steps:

acquiring the environmental information of the machine room;

and controlling the compressor, the condenser and the refrigerating water mechanism to refrigerate water and selectively controlling the evaporator and the second throttling piece to open refrigerating wind based on the environmental information.

8. The control method according to claim 7, wherein the cooling water mechanism includes a first throttle member in communication with the condenser through a pipeline, and a heat exchanger in communication with the first throttle member and the compressor through a pipeline, respectively; the heat exchanger comprises a refrigerant passage and a cooling liquid passage which are adjacently arranged;

based on the environmental information, control the compressor, the condenser with the refrigeration water mechanism makes cold water, and selective control the evaporimeter with the second throttling element opens system cold wind, include:

responding to the outdoor air inlet wet bulb temperature being less than or equal to a first preset temperature and the machine room air supply temperature being less than or equal to a preset machine room air supply temperature, and controlling the evaporator and the second throttling element to be closed;

and controlling the compressor, the condenser and the first throttling element to be opened so as to enable the refrigerant to enter the heat exchanger to cool the cooling liquid and make cold water.

9. The control method according to claim 7, wherein the cooling water mechanism includes a first throttle member in communication with the condenser through a pipeline, and a heat exchanger in communication with the first throttle member and the compressor through a pipeline, respectively; the heat exchanger comprises a refrigerant passage and a cooling liquid passage which are arranged adjacently;

responding to the fact that the outdoor inlet air wet bulb temperature is higher than a first preset temperature and the machine room air supply temperature is lower than or equal to the preset machine room air supply temperature, and controlling the compressor and the condenser to be started to change the form of the refrigerant;

controlling the second throttling element and the evaporator to be opened to produce cold air;

and controlling the first throttling element to be opened so as to enable refrigerant to enter the heat exchanger to cool the cooling liquid and make cold water.

10. A storage medium characterized in that a computer program is stored, the computer program being executable by a processor to implement the control method of any one of claims 7 to 9.