CN115426833A - Indirect evaporative cooling unit, control method and storage medium - Google Patents

Indirect evaporative cooling unit, control method and storage medium Download PDF

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Publication number
CN115426833A
CN115426833A CN202210976034.9A CN202210976034A CN115426833A CN 115426833 A CN115426833 A CN 115426833A CN 202210976034 A CN202210976034 A CN 202210976034A CN 115426833 A CN115426833 A CN 115426833A
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CN
China
Prior art keywords
air
cooling unit
evaporative cooling
outdoor
condenser
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Pending
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CN202210976034.9A
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Chinese (zh)
Inventor
卫鹏云
骆明波
刘文登
陈改芳
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Midea Group Co Ltd
Chongqing Midea General Refrigeration Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Chongqing Midea General Refrigeration Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
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Application filed by Midea Group Co Ltd, Chongqing Midea General Refrigeration Equipment Co Ltd, Hefei Midea Heating and Ventilating Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN202210976034.9A priority Critical patent/CN115426833A/en
Publication of CN115426833A publication Critical patent/CN115426833A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/20836—Thermal management, e.g. server temperature control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/208—Liquid cooling with phase change
    • H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application provides an indirect evaporative cooling unit, a control method and a storage medium. The indirect evaporative cooling unit comprises a heat exchange core body, a compression refrigeration mechanism, a bypass air valve, a detection mechanism and a control mechanism; the heat exchange core body comprises an air inlet and an air outlet; the compression refrigeration mechanism comprises a condenser and is arranged close to the air outlet; the bypass air valve is arranged between the air outlet and the condenser; the detection mechanism is used for acquiring environmental information, and the control mechanism is connected with the condenser, the bypass air valve and the detection mechanism and is used for controlling the opening and closing of the condenser and the bypass air valve based on the environmental information so as to adjust the working mode of the indirect evaporative cooling unit. The application provides an indirect evaporative cooling unit can improve the efficiency.

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. The problems to be solved urgently exist in the application process, the problem that the air-cooled indirect-connection evaporative cooling unit is low in energy efficiency and large in internal and external air duct resistance at the high wet bulb temperature is solved urgently.
Disclosure of Invention
The application provides an indirect evaporative cooling unit, a control method and a storage medium, and aims to solve the technical problem that the indirect evaporative cooling unit in the prior art is low in energy efficiency.
In order to solve the technical problem, the application adopts a technical scheme that: the indirect evaporative cooling unit comprises a heat exchange core, a compression refrigeration mechanism, a bypass air valve, a detection mechanism and a control mechanism; the heat exchange core body comprises an air inlet and an air outlet; the compression refrigeration mechanism comprises a condenser and is arranged close to the air outlet; the bypass air valve is arranged between the air outlet and the condenser; the detection mechanism is used for acquiring environmental information, and the control mechanism is connected with the condenser, the bypass air valve and the detection mechanism and used for controlling the opening and closing of the condenser and the bypass air valve based on the environmental information so as to adjust the working mode of the indirect evaporative cooling unit.
In order to solve the above technical problem, another technical solution adopted by the present application is: 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: the control mechanism controls the detection mechanism to acquire the environmental information; and the control mechanism controls the opening and closing of the condenser and the bypass air valve based on the machine room environment information so as to adjust the working mode of the indirect evaporative cooling unit.
In order to solve the above technical problem, the present application adopts another technical solution: there is provided a storage medium having stored thereon a computer program executable by a processor to implement the method of controlling an indirect evaporative cooling unit as described above.
The beneficial effect of this application is: the indirect evaporative cooling unit is provided with a heat exchange core body comprising an air inlet and an air outlet, a condenser of the compression refrigeration mechanism, a bypass air valve, a detection mechanism and a control mechanism, wherein the condenser of the compression refrigeration mechanism is arranged close to the air outlet of the heat exchange core body, and the bypass air valve, the detection mechanism and the control mechanism are arranged between the air outlet and the condenser. Through the arrangement mode, the control mechanism controls the detection mechanism to acquire the environmental information, controls the opening and closing of the condenser and the bypass air valve based on the environmental information, and adjusts the working mode of the indirect evaporative cooling unit and the air supply temperature of the unit; furthermore, the opening of the bypass air valve is controlled, the air channel of outdoor fresh air is shortened, the heat exchange efficiency of the condenser is improved, and the energy efficiency of the indirect evaporative cooling unit is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are 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 block diagram of one embodiment of a sample analyzer provided herein;
FIG. 2 is a schematic flow chart illustrating an embodiment of a method for controlling an indirect evaporative cooling unit provided herein;
FIG. 3 is a flowchart illustrating an embodiment of step S120 of a control method of the indirect evaporative cooling unit of FIG. 2;
FIG. 4 is a schematic flow chart diagram of another embodiment of step S120 of the control method of the indirect evaporative cooling unit in FIG. 2;
FIG. 5 is a schematic flow chart diagram of a step S120 of the control method of the indirect evaporative cooling unit in FIG. 2;
fig. 6 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 of "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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an indirect evaporative cooling unit provided in the present application. As shown in fig. 1, the indirect evaporative cooling unit 10 includes a heat exchange core 110, a compression refrigeration mechanism 120, a bypass damper 130, a detection mechanism (not shown), and a control mechanism (not shown). The heat exchanging core 110 mainly comprises a first air duct and a second air duct, and the first air duct and the second air duct are respectively provided with an air inlet and an air outlet which can be communicated with the air duct inside the external or indirect evaporative cooling unit 10. Outdoor fresh air and indoor return air can flow through the two groups of air channels of the heat exchange core 110 as cold and hot fluids respectively, the heat exchange core 110 can exchange heat with the outdoor fresh air and the indoor return air, and the outdoor fresh air and the indoor return air can also exchange heat. The heat exchange core 110 can adjust the temperature of the air supplied by the indirect evaporative cooling unit 10. Compression refrigeration mechanism 120 includes condenser 121, and condenser 121 is close to the air outlet setting of heat exchange core 110. The condenser 121 can convert the gas or vapor to a liquid to transfer the heat in the tubing to the air adjacent the tubing in a faster manner. The operation of condenser 121 is a heat releasing process, so that the temperature of condenser 121 is high, and the degree of heat dissipation affects the energy efficiency of indirect evaporative cooling. When the condenser 121 works, outdoor fresh air discharged from the air outlet of the heat exchange core 110 passes through the condenser 121, takes away heat of the condenser 121, and cools the condenser. When the condenser 121 is turned on, that is, when the compression refrigeration mechanism 120 is operated, the temperature of the return air in the room can be lowered, thereby adjusting the supply air temperature of the indirect evaporative cooling unit 10.
The bypass air valve 130 is arranged between the air outlet of the heat exchange core 110 and the condenser 121, and when the bypass air valve 130 is opened, outdoor fresh air can directly enter the indirect evaporative cooling unit 10 from the bypass air valve 130 and pass through the condenser 121, so that heat of the condenser 121 is taken away, and the temperature of the condenser is reduced; furthermore, part of outdoor fresh air directly passes through the condenser 121 from the bypass air valve 130, namely reaches the condenser 121 through a short air duct, so that the comprehensive wind resistance of the whole outer air duct can be reduced.
The detection mechanism is mainly used for acquiring environmental information, and the detection mechanism can be used for detecting the environmental information of the indirect evaporative cooling unit 10, such as the temperature and humidity of air in different distribution areas in the unit, the temperature and humidity of outdoor air, namely outdoor fresh air entering the unit, and the temperature and humidity of indoor return air; the temperature and humidity of the air supplied by the unit, etc. Wherein the detection mechanism may comprise a sensor assembly for air measurement. The environmental information may include indoor inlet air dry bulb temperature, indoor inlet air wet bulb temperature, indoor return air dry bulb temperature, supply air temperature, and the like.
The control mechanism is connected with the condenser 121, the bypass air valve 130 and the detection mechanism, and is used for controlling the opening and closing of the condenser 121 and the bypass air valve 130 based on the environmental information so as to adjust the working mode of the indirect evaporative cooling unit 10 and the heat exchange efficiency of the condenser 121, and further adjust the air supply temperature of the indirect evaporative cooling unit 10. 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.
The control mechanism controls the detection mechanism to acquire environmental information, can control the bypass air valve 130 and the condenser 121 to be closed, utilizes the heat exchange core 110, introduces outdoor fresh air to cool indoor return air, and simultaneously performs heat exchange with the outdoor fresh air and the indoor return air so as to adjust the air supply temperature of the indirect evaporative cooling unit 10. Or the control mechanism controls the condenser 121 and the bypass air valve 130 to be opened, the indoor return air is cooled again by the indirect compression refrigeration mechanism 120, and the air supply temperature of the indirect evaporative cooling unit 10 is further adjusted. The indirect evaporative cooling unit 10 can control the opening and closing of the condenser 121 and the bypass damper 130 through the control mechanism to adjust the operation mode of the indirect evaporative cooling unit 10.
The indirect evaporative cooling unit 10 is provided with a heat exchange core 110 including an air inlet and an air outlet, a condenser 121 of the compression refrigeration mechanism 120 disposed near the air outlet of the heat exchange core 110, a bypass air valve 130 disposed between the air outlet and the condenser 121, a detection mechanism, and a control mechanism. Through the arrangement mode, the control mechanism controls the detection mechanism to acquire the environmental information, controls the opening and closing of the condenser 121 and the bypass air valve 130 based on the environmental information, and adjusts the working mode of the indirect evaporative cooling unit 10 and the air supply temperature of the unit; further, the opening of the bypass air valve 130 is controlled, and the distance from outdoor fresh air to the condenser 121 is shortened, so that the comprehensive air resistance of the whole external air channel is reduced, the heat exchange efficiency of the condenser 121 is improved, and the energy efficiency of the indirect evaporative cooling unit 10 is improved.
The indirect evaporative cooling unit 10 can be applied to a data center machine room, and the control mechanism controls the opening and closing of the bypass air valve 130 and the condenser 121 based on the internal environment information or the external environment information of the machine room, so that the working mode of the indirect evaporative cooling unit 10 can be adjusted, the air supply temperature of the indirect evaporative cooling unit 10 is adjusted, and the requirement of the data center machine room is met.
Alternatively, the control mechanism controls the opening ratio of the bypass damper 130 to adjust the saturation pressure of the condenser 121. Wherein, the bypass damper 130 can be opened proportionally, and proportional opening means: the bypass damper 130 may be fully opened, or opened to 30%, 50%, 60%, 80%, etc., and the opening ratio is different, and the amount of air introduced into or discharged from the outdoor fresh air is different, but the amount of air introduced into or discharged from the bypass damper 130 is positively correlated to the opening ratio of the bypass damper 130. The bypass damper 130 is opened in a ratio to adjust the saturation pressure and saturation temperature of the condenser 121.
Optionally, the environmental information includes outdoor intake dry bulb temperature and supply air temperature of the indirect evaporative cooling unit 10. The air outlet of the heat exchange core body 110 comprises a fresh air outlet and a return air outlet, and the fresh air outlet mainly discharges outdoor fresh air which completes heat exchange in the heat exchange core body 110; the return air outlet mainly discharges indoor return air which completes heat exchange in the heat exchange core 110.
The indirect evaporative cooling unit 10 further includes an outdoor side fan 140 and an indoor side fan 150. The outdoor fan 140 is disposed near a side of the condenser 121 facing away from the bypass damper 130. The indoor side fan 150 is disposed near the return air outlet of the heat exchange core 110. When the outdoor fan 140 is turned on, the speed of fresh air circulation and heat exchange inside and outside the heat exchange core 110 can be increased; in addition, the rotation speed of the outdoor fan 140 can be adjusted to adjust the fresh air circulation speed inside and outside the heat exchange core 110 and the heat exchange degree. When the outdoor fan 140 is turned off or the rotation speed thereof is reduced, the energy consumption of the indirect evaporative cooling unit 10 can be reduced, thereby improving the energy efficiency of the indirect evaporative cooling unit 10. Similarly, the indoor fan 150 is provided, and when the indoor fan 150 is turned on, the speed of air return circulation and heat exchange in the chamber of the heat exchange core 110 can be increased; in addition, the rotation speed of the outdoor fan 140 can also be adjusted to adjust the circulation speed of the return air in the inner chamber of the heat exchange core 110 and the degree of heat exchange. When the indoor side fan 150 is turned off or the rotating speed thereof is reduced, the energy consumption of the indirect evaporative cooling unit 10 can be reduced, so that the energy efficiency of the indirect evaporative cooling unit 10 is improved.
In response to that the outdoor air inlet dry bulb temperature is less than or equal to the first outdoor air inlet switching temperature threshold and the air supply temperature is greater than or equal to the air supply temperature threshold, the control mechanism controls the condenser 121, the bypass air valve 130 to be closed and controls the outdoor side fan 140 and the indoor side fan 150 to operate, so that the indirect evaporative cooling unit 10 operates in the first mode. The indirect evaporative cooling unit 10 operates in the first mode when: the control mechanism controls the condenser 121 and the bypass damper 130 to close in response to the outdoor inlet air wet bulb temperature being greater than the first outdoor inlet air switching temperature threshold and the supply air temperature being greater than or equal to the supply air temperature threshold, so that the indirect evaporative cooling unit 10 operates in the first mode. The indoor fan 150 and the outdoor fan 140 are controlled to be turned on and the rotating speeds of the indoor fan and the outdoor fan are controlled to be adjusted, outdoor fresh air enters the first air channel of the heat exchange core 110, indoor return air enters the second air channel of the heat exchange core 110, heat exchange is carried out between the heat exchange core 110 and the indoor return air and between the outdoor fresh air and the indoor return air respectively in the first air channel and the second air channel of the heat exchange core 110, heat exchange is carried out, and therefore the air supply temperature of the indirect evaporative cooling unit 10 is adjusted.
The heat exchanging core 110 includes an air inlet and an air outlet, and the indirect evaporative cooling unit 10 further includes an outdoor fan 140 disposed near one side of the condenser 121 away from the bypass damper 130, and an indoor fan 150 disposed near the air outlet of the heat exchanging core 110. Through the arrangement mode, when the outdoor inlet air dry bulb temperature is less than or equal to the first outdoor inlet air switching temperature threshold and the air supply temperature is greater than or equal to the air supply temperature threshold, the indirect evaporative cooling unit 10 controls the condenser 121 and the bypass air valve 130 to be closed through the control mechanism, so that the indirect evaporative cooling unit 10 works in the first mode, the indoor return air is cooled by utilizing the heat exchange core 110, the indoor side fan 150 and the outdoor side fan 140 are controlled to be started and the rotating speed of the indoor side fan and the outdoor side fan is controlled to be adjusted, the degree of heat exchange between the indoor return air and the outdoor fresh air and the speed of the exhaust air duct are improved, and the air supply temperature of the indirect evaporative cooling unit 10 is adjusted; further, the energy efficiency of the indirect evaporative cooling unit 10 can be improved by reducing the rotation speed of the indoor side fan 150 and the outdoor side fan 140.
Optionally, the environmental information further includes outdoor inlet air wet bulb temperature. The indirect evaporative cooling unit 10 further includes a spraying mechanism 160 disposed near the fresh air outlet of the heat exchange core 110. The spraying mechanism 160 is mainly used for cooling the outdoor fresh air in the first air duct.
In another embodiment, the spraying mechanism 160 is disposed close to the heat exchange core 110, the spraying mechanism 160 sprays the cooling liquid onto the outer surface of the heat exchange core 110, the cooling liquid takes away the heat of the heat exchange core 110, and the cooled heat exchange core 110 cools and humidifies the outdoor fresh air and the indoor return air in the first air duct and the second air duct, thereby playing a role in cooling and humidifying.
And the control mechanism responds that the outdoor inlet air dry bulb temperature is greater than the first outdoor inlet air switching temperature threshold, the outdoor inlet air wet bulb temperature is less than or equal to the second outdoor inlet air switching temperature threshold, and the air supply temperature is greater than the air supply temperature threshold, and controls the condenser 121 and the bypass air valve 130 to be closed and controls the outdoor side fan 140, the indoor side fan 150 and the spraying mechanism 160 to work, so that the indirect evaporative cooling unit 10 works in the second mode. When the indirect evaporative cooling unit 10 is operated in the second mode: the control mechanism controls the condenser 121 and the bypass air valve 130 to be closed to enable the indirect evaporative cooling unit 10 to work in the second mode in response to the outdoor air inlet dry bulb temperature being greater than the first outdoor air inlet switching temperature threshold, the outdoor air inlet wet bulb temperature being less than or equal to the second outdoor air inlet switching temperature threshold, and the air supply temperature being greater than the air supply temperature threshold; controlling the outdoor fan 140, the indoor fan 150 and the control spraying mechanism 160 to work, wherein outdoor fresh air enters the first air channel of the heat exchange core 110, and the spraying mechanism 160 cools the outdoor fresh air; the indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and the cooled outdoor fresh air exchanges heat with the indoor return air to adjust the air supply temperature of the indirect evaporative cooling unit 10.
The indirect evaporative cooling unit 10 further includes a spraying mechanism 160 disposed adjacent to the outdoor fresh air outlet. Through the arrangement mode, when the outdoor inlet air dry bulb temperature is greater than the first outdoor inlet air switching temperature threshold, the outdoor inlet air wet bulb temperature is less than or equal to the second outdoor inlet air switching temperature threshold, and the air supply temperature is greater than the air supply temperature threshold, the indirect evaporative cooling unit 10 controls the condenser 121 and the bypass air valve 130 to be closed through the control mechanism, so that the indirect evaporative cooling unit 10 works in the second mode; controlling the outdoor fan 140, the indoor fan 150 and the control spraying mechanism 160 to work, wherein outdoor fresh air enters the first air channel of the heat exchange core 110, and the spraying mechanism 160 cools the outdoor fresh air; the indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and meanwhile, the cooled outdoor fresh air exchanges heat with the indoor return air to adjust the air supply temperature of the indirect evaporative cooling unit 10.
Optionally, the compression refrigeration mechanism 120 further includes an evaporator 122, a compressor 123, and an electronic expansion valve 124. The compressor 123 is connected to the condenser 121 and the evaporator 122, and provides a medium for heat exchange to the condenser 121 and the evaporator 122. Wherein, the heat exchange medium can be refrigerant. The compressor 123 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 evaporator 122 is disposed between the return air outlet and the indoor fan 150. When the evaporator 122 works, the liquid refrigerant can be converted into the gaseous refrigerant, the gaseous refrigerant exchanges heat with the surrounding air, and the evaporator 122 can cool the indoor return air discharged from the return air outlet after gasification and heat absorption. The electronic expansion valve 124 is connected to the condenser 121 and the evaporator 122 through a pipe, the refrigerant discharged from the condenser 121 is rapidly cooled in the electronic expansion valve 124 to become a low-temperature and low-pressure liquid refrigerant, the electronic expansion valve 124 may also control the flow rate of the refrigerant discharged to the evaporator 122, and the electronic expansion valve 124 may be used to adjust a heat exchange medium. When the compression refrigeration mechanism 120 is in operation: the compressor 123 operates on low-temperature and low-pressure refrigerant gas and discharges high-temperature and high-pressure refrigerant gas; the refrigerant gas enters the condenser 121 along the pipe, and the condenser 121 converts the high-temperature and high-pressure refrigerant gas into a liquid refrigerant; refrigerant enters the electronic expansion valve 124 to condition and discharge refrigerant to the evaporator 122; the evaporator 122 exchanges heat between the cold source of the refrigerant and the indoor return air discharged from the return air outlet, and reduces the temperature of the indoor return air, thereby adjusting the supply air temperature of the indirect evaporative cooling unit 10.
In response to that the outdoor inlet air wet bulb temperature is greater than the second outdoor inlet air switching temperature threshold and the supply air temperature is greater than the supply air temperature threshold, the control mechanism controls the condenser 121, the evaporator 122, the compressor 123, the electronic expansion valve 124 and the spraying mechanism 160 to operate, and controls the bypass air valve 130, the outdoor side fan 140 and the indoor side fan 150 to be opened, so that the indirect evaporative cooling unit 10 operates in the third mode. The indirect evaporative cooling unit 10 operates in the third mode when: the control mechanism controls the condenser 121 and the bypass air valve 130 to be opened in response to that the outdoor inlet air wet bulb temperature is greater than the second outdoor inlet air switching temperature threshold and the air supply temperature is greater than the air supply temperature threshold, so that the indirect evaporative cooling unit 10 works in the third mode. The evaporator 122, the compressor 123, the electronic expansion valve 124 and the spraying mechanism 160 are controlled to work, the outdoor fan 140 and the indoor fan 150 are controlled to be started, outdoor fresh air enters the first air channel of the heat exchange core 110, and the spraying mechanism 160 cools the outdoor fresh air. The indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and the cooled outdoor fresh air exchanges heat with the indoor return air. The indoor return air after completing the heat exchange is discharged out of the second air duct and passes through the evaporator 122, the evaporator 122 cools the indoor return air again, and the air supply temperature of the indirect evaporative cooling unit 10 is further adjusted; further, the bypass air valve 130 is controlled to be opened, outdoor fresh air directly passes through the condenser 121 from the bypass air valve 130, heat of the condenser 121 is taken away, heat exchange efficiency of the condenser 121 is improved, air resistance of the outdoor fresh air is reduced, and therefore energy efficiency of the indirect evaporative cooling unit 10 is improved.
The indirect evaporative cooling unit 10 further includes an evaporator 122, a compressor 123, and an electronic expansion valve 124, the compressor 123 is connected to the condenser 121 and the evaporator 122, the evaporator 122 is disposed between the return air outlet and the indoor side fan 150, and the electronic expansion valve 124 is connected to the condenser 121 and the evaporator 122 through a pipeline. Through the above arrangement, when the outdoor inlet air wet bulb temperature is greater than the second outdoor inlet air switching temperature threshold, and the air supply temperature is greater than the air supply temperature threshold, the indirect evaporative cooling unit 10 controls the condenser 121, the evaporator 122, the compressor 123, the electronic expansion valve 124, and the spraying mechanism 160 to operate through the control mechanism, and controls the bypass air valve 130, the outdoor side fan 140, and the indoor side fan 150 to be opened, so that the indirect evaporative cooling unit 10 operates in the third mode. The evaporator 122, the compressor 123, the electronic expansion valve 124 and the spraying mechanism 160 are controlled to work, the outdoor fan 140 and the indoor fan 150 are controlled to be started, outdoor fresh air enters the first air channel of the heat exchange core 110, and the spraying mechanism 160 cools the outdoor fresh air; the indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and the cooled outdoor fresh air exchanges heat with the indoor return air; the indoor return air after completing the heat exchange is discharged out of the second air duct and passes through the evaporator 122, and the evaporator 122 further cools the indoor return air and adjusts the air supply temperature of the indirect evaporative cooling unit 10; further, the bypass air valve 130 is controlled to be opened, outdoor fresh air directly passes through the condenser 121 from the bypass air valve 130, heat of the condenser 121 is taken away, heat exchange efficiency of the condenser 121 is improved, air resistance of the outdoor fresh air is reduced, and therefore energy efficiency of the indirect evaporative cooling unit 10 is improved.
The present application further provides a control method for an indirect evaporative cooling unit, which is applied to the indirect evaporative cooling unit 10. Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of the indirect evaporative cooling unit control method provided in the present application. As shown in fig. 2, the control method includes:
step S110: the control mechanism controls the detection mechanism to acquire the environmental information.
The detection mechanism can be used for detecting environmental information of the indirect evaporative cooling unit 10, such as the temperature and humidity of the unit, the temperature and humidity of outdoor air, namely outdoor fresh air entering the unit, and the temperature and humidity of indoor return air; the temperature and the humidity of the air supplied by the unit, the temperature of outdoor air inlet wet bulb, the temperature of outdoor air inlet dry bulb, the temperature of indoor return air wet bulb, the temperature of indoor return air dry bulb, the temperature of unit air supply dry bulb, the temperature of machine room air supply wet bulb and the like. The environmental information may include indoor inlet air dry bulb temperature, indoor inlet air wet bulb temperature, indoor return air dry bulb temperature, supply air temperature, etc.
Step S120: the control mechanism controls the opening and closing of the condenser 121 and the bypass damper 130 based on the environmental information to adjust the operation mode of the indirect evaporative cooling unit 10.
The control mechanism controls the detection mechanism to acquire environmental information, can control the bypass air valve 130 and the condenser 121 to be closed, utilizes the heat exchange core 110, introduces outdoor fresh air to cool indoor return air, and simultaneously performs heat exchange with the outdoor fresh air and the indoor return air so as to adjust the air supply temperature of the indirect evaporative cooling unit 10. Or the control mechanism controls the condenser 121 and the bypass air valve 130 to be opened, the intermediate compression refrigeration mechanism 120 is used for carrying out secondary cooling on the indoor return air, and the air supply temperature of the indirect evaporative cooling unit 10 is further adjusted. The indirect evaporative cooling unit 10 may control the opening of the condenser 121 and the bypass damper 130 through a control mechanism to adjust the operation mode of the indirect evaporative cooling unit 10.
By the control method, the control mechanism controls the detection mechanism to acquire the environmental information, controls the opening and closing of the condenser 121 and the bypass air valve 130 based on the environmental information, and adjusts the working mode of the indirect evaporative cooling unit 10 and the air supply temperature of the unit; further, the opening of the bypass air valve 130 is controlled, and the air channel of outdoor fresh air is shortened, so that the heat exchange efficiency of the condenser 121 is improved, and the energy efficiency of the indirect evaporative cooling unit 10 is improved.
In the embodiment of step S120, the air outlets of the heat exchanging core 110 include a fresh air outlet and a return air outlet. The indirect evaporative cooling unit 10 further includes an outdoor fan 140 disposed near one side of the condenser 121 away from the bypass air valve 130, and an indoor fan 150 disposed near the return air outlet. Referring to fig. 3, fig. 3 is a schematic flowchart illustrating an embodiment of step S120 of the indirect evaporative cooling unit control method of fig. 2. As shown in fig. 3, step S120 may further include the steps of:
step S121: and controlling the condenser 121 and the bypass air valve 130 to be closed to enable the indirect evaporative cooling unit 10 to work in the first mode in response to the outdoor air inlet dry bulb temperature being less than or equal to the first outdoor air inlet switching temperature threshold and the air supply temperature being greater than or equal to the air supply temperature threshold.
The control mechanism controls the condenser 121 and the bypass damper 130 to close in response to the outdoor inlet air wet bulb temperature being greater than the first outdoor inlet air switching temperature threshold and the supply air temperature being greater than or equal to the supply air temperature threshold, so that the indirect evaporative cooling unit 10 operates in the first mode. Wherein, first outdoor air inlet switches temperature threshold and means: when the indirect evaporative cooling unit 10 mode switch, the temperature value of first outdoor air inlet. The air supply temperature threshold value is as follows: the air supply temperature threshold value preset by the indirect evaporative cooling unit 10.
Step S122: the outdoor fan 140 and the outdoor fan 140 are controlled to be turned on to adjust the air supply temperature of the indirect evaporative cooling unit 10.
The control mechanism controls the indoor side fan 150 and the outdoor side fan 140 to be started and the rotating speed of the indoor side fan and the outdoor side fan to be reduced, outdoor fresh air enters the first air channel of the heat exchange core 110, indoor return air enters the second air channel of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the outdoor fresh air, and meanwhile 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 exchange heat, so that the air supply temperature of the indirect evaporative cooling unit 10 is adjusted. The control mechanism can reduce the rotating speed of the outdoor fan 140 and the indoor fan 150, so as to reduce the energy consumption of the indirect evaporative cooling unit 10 and further improve the energy efficiency.
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.
Step S120 is implemented by setting the above steps, when the outdoor intake dry bulb temperature is less than or equal to the first outdoor intake switching temperature threshold and the supply air temperature is greater than or equal to the supply air temperature threshold, the indirect evaporative cooling unit 10 controls the condenser 121 and the bypass air valve 130 to close through the control mechanism, so that the indirect evaporative cooling unit 10 operates in the first mode, the heat exchange core 110 is used to cool the indoor return air, the indoor side fan 150 and the outdoor side fan 140 are controlled to be turned on and the rotation speed thereof is adjusted, the degree of heat exchange between the indoor return air and the outdoor fresh air and the speed of the discharge air duct are improved, and the supply air temperature of the indirect evaporative cooling unit 10 is adjusted. Further, the rotation speeds of the outdoor side fan 140 and the indoor side fan 150 are reduced simultaneously, so that the energy consumption of the indirect evaporation unit can be reduced, and the energy efficiency of the indirect evaporation unit is improved.
In another embodiment, the air outlets include a fresh air outlet and a return air outlet, and the indirect evaporative cooling unit 10 further includes an outdoor fan 140 disposed near one side of the condenser 121 away from the bypass damper 130, an indoor fan 150 disposed near the return air outlet, and a spraying mechanism 160 disposed near the fresh air outlet. Referring to fig. 4, fig. 4 is a schematic flowchart of another embodiment of step S120 of the indirect evaporative cooling unit control method of fig. 2. As shown in fig. 4, step S120 may further include the steps of:
step S221: and in response to that the outdoor air inlet dry bulb temperature is greater than the first outdoor air inlet switching temperature threshold, the outdoor air inlet wet bulb temperature is less than or equal to the second outdoor air inlet switching temperature threshold, and the air supply temperature is greater than the air supply temperature threshold, the condenser 121 and the bypass air valve 130 are controlled to be closed, so that the indirect evaporative cooling unit 10 works in the second mode.
The control mechanism controls the condenser 121 and the bypass air valve 130 to be closed to enable the indirect evaporative cooling unit 10 to work in the second mode in response to that the outdoor air inlet dry bulb temperature is greater than the first outdoor air inlet switching temperature threshold, the outdoor air inlet wet bulb temperature is less than or equal to the second outdoor air inlet switching temperature threshold, and the air supply temperature is greater than the air supply temperature threshold. Wherein, first outdoor air inlet switches temperature threshold and means: when the indirect evaporative cooling unit 10 mode switch, the temperature value of first outdoor air inlet. The second outdoor air inlet switching temperature threshold refers to: and when the working modes of the indirect evaporative cooling unit 10 are switched, the temperature value of the inlet air outside the second chamber is set. The air supply temperature threshold value is as follows: the air supply temperature threshold value preset by the indirect evaporative cooling unit 10.
Step S222: the outdoor fan 140, the indoor fan 150 and the spraying mechanism 160 are controlled to operate to adjust the supply air temperature of the indirect evaporative cooling unit 10.
The outdoor fan 140 and the indoor fan 150 are controlled to be turned on and the rotational speed is reduced. The spraying mechanism 160 is controlled to work, outdoor fresh air enters the first air channel of the heat exchange core body 110, and the spraying mechanism 160 cools the outdoor fresh air. The indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and the cooled outdoor fresh air exchanges heat with the indoor return air, so that the air supply temperature of the indirect evaporative cooling unit 10 is adjusted.
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.
In step S120, by setting the above steps, when the outdoor intake dry bulb temperature is greater than the first outdoor intake switching temperature threshold, the outdoor intake wet bulb temperature is less than or equal to the second outdoor intake switching temperature threshold, and the supply air temperature is greater than the supply air temperature threshold, the control mechanism controls the condenser 121 and the bypass air valve 130 to close, so that the indirect evaporative cooling unit 10 operates in the second mode. Controlling the outdoor fan 140, the indoor fan 150 and the spraying mechanism 160 to work, wherein outdoor fresh air enters the first air channel of the heat exchange core 110, and the spraying mechanism 160 cools the outdoor fresh air; the indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and the cooled outdoor fresh air exchanges heat with the indoor return air, so that the air supply temperature of the indirect evaporative cooling unit 10 is adjusted. Further, the outdoor side fan 140 and the indoor side fan 150 are controlled to reduce the rotating speed, so that the energy consumption of the indirect evaporation unit is reduced, and the energy efficiency is improved.
In another embodiment, the air outlets include fresh air outlets and return air outlets. The indirect evaporative cooling unit 10 further includes an outdoor fan 140 disposed near one side of the condenser 121 away from the bypass air valve 130, an indoor fan 150 disposed near the return air outlet, and a spraying mechanism 160 disposed near the fresh air outlet. The compression refrigeration mechanism 120 further includes an evaporator 122 disposed between the return air outlet and the indoor fan 150, a compressor 123 connected to the condenser 121 and the evaporator 122, and an electronic expansion valve 124 connected to the condenser 121 and the evaporator 122. Referring to fig. 5, fig. 5 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. 5, step S120 may further include the steps of:
step S321: in response to that the outdoor inlet air wet bulb temperature is greater than the second outdoor inlet air switching temperature threshold and the supply air temperature is greater than the supply air temperature threshold, the condenser 121 and the bypass air valve 130 are controlled to be opened, so that the indirect evaporative cooling unit 10 operates in the third mode.
The control mechanism controls the condenser 121 and the bypass air valve 130 to be opened in response to that the outdoor inlet air wet bulb temperature is greater than the second outdoor inlet air switching temperature threshold and the air supply temperature is greater than the air supply temperature threshold, so that the indirect evaporative cooling unit 10 works in the third mode. Wherein, the outdoor air inlet of second switches temperature threshold and means: and when the working modes of the indirect evaporative cooling unit 10 are switched, the temperature value of the inlet air outside the second chamber is set. The air supply temperature threshold value is as follows: the air supply temperature threshold preset by the indirect evaporative cooling unit 10.
Step S322: and controlling the evaporator 122, the compressor 123, the electronic expansion valve 124 and the spraying mechanism 160 to work, and controlling the outdoor fan 140 and the indoor fan 150 to be opened so as to adjust the air supply temperature of the indirect evaporative cooling unit 10.
The control mechanism controls the evaporator 122, the compressor 123, the electronic expansion valve 124 and the spraying mechanism 160 to work and controls the outdoor fan 140 and the indoor fan 150 to be opened, outdoor fresh air enters the first air channel of the heat exchange core body 110, and the spraying mechanism 160 cools the outdoor fresh air; the indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and the cooled outdoor fresh air exchanges heat with the indoor return air. The indoor return air after the heat exchange is discharged out of the second air duct and passes through the evaporator 122, and the evaporator 122 further cools the indoor return air, thereby adjusting the supply air temperature of the indirect evaporative cooling unit 10. Further, the control mechanism can control the bypass air valve 130 to be opened proportionally, outdoor fresh air directly passes through the condenser 121 from the bypass air valve 130, heat of the condenser 121 is taken away, heat exchange efficiency of the condenser 121 is improved, air resistance of the outdoor fresh air is reduced, and therefore energy efficiency of the indirect evaporative cooling unit 10 is improved.
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.
In step S120, by setting the above steps, when the outdoor intake air wet bulb temperature is greater than the second outdoor intake air switching temperature threshold and the supply air temperature is greater than the supply air temperature threshold, the control mechanism controls the condenser 121 and the bypass air valve 130 to be opened, so that the indirect evaporative cooling unit 10 operates in the third mode. The evaporator 122, the compressor 123, the electronic expansion valve 124 and the spraying mechanism 160 are controlled to work, and the outdoor fan 140 and the indoor fan 150 are controlled to be started, so that when outdoor fresh air enters the first air channel of the heat exchange core 110, the spraying mechanism 160 cools the outdoor fresh air. When the indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and the cooled outdoor fresh air exchanges heat with the indoor return air. The indoor return air after completing the heat exchange is discharged out of the second air duct and passes through the evaporator 122, the evaporator 122 cools the indoor return air again, and the air supply temperature of the indirect evaporative cooling unit 10 is further adjusted; further, the bypass air valve 130 is controlled to be opened in proportion, so that the circulation of outdoor fresh air passing through the condenser 121 is adjusted, the heat of the condenser 121 is taken away, the heat exchange efficiency of the condenser 121 is improved, the air resistance of the outdoor fresh air is reduced, and the energy efficiency of the indirect evaporative cooling unit 10 is improved.
The present application further provides a storage medium, and referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of the storage medium provided in the present application. As shown in fig. 6, 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 control method embodiment of the indirect evaporative cooling unit. 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.
Compared with the prior art, the indirect evaporative cooling unit 10 is provided with a heat exchange core 110 including an air inlet and an air outlet, a condenser 121 of the compression refrigeration mechanism 120 arranged close to the air outlet of the heat exchange core 110, a bypass air valve 130 arranged between the air outlet and the condenser 121, a detection mechanism and a control mechanism. Through the arrangement mode, the control mechanism controls the detection mechanism to acquire the environmental information, controls the opening and closing of the condenser 121 and the bypass air valve 130 based on the environmental information, and adjusts the working mode of the indirect evaporative cooling unit 10 and the air supply temperature of the unit; further, the opening of the bypass air valve 130 is controlled, and the air channel of outdoor fresh air is shortened, so that the heat exchange efficiency of the condenser 121 is improved, and the energy efficiency of the indirect evaporative cooling unit 10 is improved.
The indirect evaporative cooling unit 10 further includes an outdoor fan 140 disposed near one side of the condenser 121 away from the bypass damper 130, and an indoor fan 150 disposed near the return air outlet of the heat exchange core 110. Through the arrangement mode, when the outdoor air inlet dry bulb temperature is less than or equal to the first outdoor air inlet switching temperature threshold value, and the air supply temperature is greater than or equal to the air supply temperature threshold value, the indirect evaporative cooling unit 10 controls the condenser 121 and the bypass air valve 130 to be closed through the control mechanism, so that the indirect evaporative cooling unit 10 works in the first mode, the heat exchange core body 110 is utilized to cool the indoor return air, the indoor side fan 150 and the outdoor side fan 140 are controlled to be started and the rotating speed of the indoor return air and the outdoor fresh air heat exchange is controlled to be adjusted, the degree of the indoor return air and the outdoor fresh air heat exchange is improved, and the speed of the exhaust air channel is increased, and the air supply temperature of the indirect evaporative cooling unit 10 is adjusted.
The indirect evaporative cooling unit 10 further includes a spraying mechanism 160 disposed near the fresh air outlet. Through the arrangement mode, when the outdoor inlet air dry bulb temperature is greater than the first outdoor inlet air switching temperature threshold, the outdoor inlet air wet bulb temperature is less than or equal to the second outdoor inlet air switching temperature threshold, and the air supply temperature is greater than the air supply temperature threshold, the indirect evaporative cooling unit 10 controls the condenser 121 and the bypass air valve 130 to be closed through the control mechanism, so that the indirect evaporative cooling unit 10 works in the second mode; controlling the outdoor fan 140, the indoor fan 150 and the spraying mechanism 160 to work, wherein outdoor fresh air enters the first air channel of the heat exchange core 110, and the spraying mechanism 160 cools the outdoor fresh air; the indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and meanwhile, the cooled outdoor fresh air exchanges heat with the indoor return air to adjust the air supply temperature of the indirect evaporative cooling unit 10.
The indirect evaporative cooling unit 10 further includes an evaporator 122, a compressor 123, and an electronic expansion valve 124, the compressor 123 is connected to the condenser 121 and the evaporator 122, the evaporator 122 is disposed between the return air outlet and the indoor side fan 150, and the electronic expansion valve 124 is connected to the condenser 121 and the evaporator 122 through a pipeline. Through the above arrangement, when the outdoor inlet air wet bulb temperature is greater than the second outdoor inlet air switching temperature threshold, and the air supply temperature is greater than the air supply temperature threshold, the indirect evaporative cooling unit 10 controls the condenser 121, the evaporator 122, the compressor 123, the electronic expansion valve 124, and the spraying mechanism 160 to operate through the control mechanism, and controls the bypass air valve 130, the outdoor side fan 140, and the indoor side fan 150 to be opened, so that the indirect evaporative cooling unit 10 operates in the third mode. The evaporator 122, the compressor 123, the electronic expansion valve 124 and the spraying mechanism 160 are controlled to work, the outdoor fan 140 and the indoor fan 150 are controlled to be started, outdoor fresh air enters the first air channel of the heat exchange core 110, and the spraying mechanism 160 cools the outdoor fresh air; the indoor return air enters the second air duct of the heat exchange core 110, the heat exchange core 110 exchanges heat with the indoor return air and the cooled outdoor fresh air, and the cooled outdoor fresh air exchanges heat with the indoor return air; the indoor return air after completing the heat exchange is discharged out of the second air duct and passes through the evaporator 122, and the evaporator 122 further cools the indoor return air and adjusts the air supply temperature of the indirect evaporative cooling unit 10; further, the bypass air valve 130 is controlled to be opened, outdoor fresh air directly passes through the condenser 121 from the bypass air valve 130, heat of the condenser 121 is taken away, heat exchange efficiency of the condenser 121 is improved, air resistance of the outdoor fresh air is reduced, and therefore energy efficiency of the indirect evaporative cooling unit 10 is improved.
In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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 description is only an embodiment of the present application, and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. An indirect evaporative cooling unit, comprising:
the heat exchange core body comprises an air inlet and an air outlet;
a compression refrigeration mechanism comprising: the condenser is arranged close to the air outlet;
the bypass air valve is positioned between the air outlet and the condenser;
the detection mechanism is used for acquiring environmental information;
and the control mechanism is connected with the condenser, the bypass air valve and the detection mechanism and is used for controlling the opening and closing of the condenser and the bypass air valve based on the environmental information so as to adjust the working mode of the evaporative cooling unit.
2. The indirect evaporative cooling unit of claim 1, wherein the environmental information includes: outdoor air inlet dry bulb temperature, air supply temperature, the air outlet includes fresh air outlet and return air outlet, indirect evaporative cooling unit still includes:
the outdoor fan is arranged close to one side of the condenser, which is far away from the bypass air valve;
the indoor side fan is arranged close to the return air outlet;
responding to the outdoor air inlet dry bulb temperature is less than or equal to a first outdoor air inlet switching temperature threshold, just the air supply temperature is greater than or equal to the air supply temperature threshold, control mechanism control the condenser the bypass air valve is closed and is controlled outdoor side fan with indoor side fan work, so that indirect evaporative cooling unit work is in the first mode.
3. The indirect evaporative cooling unit of claim 2, wherein the environmental information further comprises: outdoor wet bulb temperature of air inlet, indirect evaporative cooling unit still includes:
the spraying mechanism is arranged close to the fresh air outlet;
responding to the outdoor air inlet dry bulb temperature is greater than the first outdoor air inlet switching temperature threshold, the outdoor air inlet wet bulb temperature is less than or equal to the second outdoor air inlet switching temperature threshold, the air supply temperature is greater than the air supply temperature threshold, the control mechanism controls the condenser, the bypass air valve is closed and controlled the outdoor side fan, the indoor side fan and the spraying mechanism work, so that the indirect evaporative cooling unit works in the second mode.
4. The indirect evaporative cooling unit of claim 3, wherein the compression refrigeration mechanism further comprises:
the evaporator is arranged between the return air outlet and the indoor side fan;
a compressor connected to the condenser and the evaporator for supplying a medium for heat exchange to the condenser and the evaporator;
the electronic expansion valve is connected with the condenser and the evaporator through pipelines and is used for adjusting heat exchange media;
responding to the outdoor air inlet wet bulb temperature is greater than the second outdoor air inlet switching temperature threshold value, and the air supply temperature is greater than the air supply temperature threshold value, the control mechanism controls the condenser, the evaporator, the compressor, the electronic expansion valve and the spraying mechanism to work, and controls the bypass air valve, the outdoor side fan and the indoor side fan to be opened, so that the indirect evaporative cooling unit works in a third mode.
5. The indirect evaporative cooling unit of claim 1, wherein the control mechanism controls the opening ratio of the bypass damper to adjust the saturation pressure of the condenser.
6. A control method of an indirect evaporative cooling unit, the control method being used for the indirect evaporative cooling unit according to any one of claims 1 to 5, the control method comprising:
the control mechanism controls the detection mechanism to acquire environmental information;
and the control mechanism controls the opening and closing of the condenser and the bypass air valve based on the environmental information so as to adjust the working mode of the indirect evaporative cooling unit.
7. The control method of claim 6, wherein the air outlets comprise a fresh air outlet and a return air outlet, and the indirect evaporative cooling unit further comprises: the outdoor fan is arranged close to one side of the condenser, which is far away from the bypass air valve, and the indoor fan is arranged close to the return air outlet;
the control mechanism controls the condenser and the bypass air valve to be opened and closed based on the environmental information so as to adjust the working mode of the indirect evaporative cooling unit, and the control mechanism comprises:
in response to the outdoor air inlet dry bulb temperature being less than or equal to a first outdoor air inlet switching temperature threshold and the air supply temperature being greater than or equal to an air supply temperature threshold, controlling the condenser and the bypass air valve to be closed so as to enable the indirect evaporative cooling unit to work in a first mode;
and controlling the outdoor fan and the outdoor fan to be opened so as to adjust the air supply temperature of the indirect evaporative cooling unit.
8. The control method according to claim 6, wherein the air outlet comprises a fresh air outlet and a return air outlet, and the indirect evaporative cooling unit further comprises: the outdoor side fan is arranged close to one side of the condenser, which is far away from the bypass air valve, the indoor side fan is arranged close to the return air outlet, and the spraying mechanism is arranged close to the fresh air outlet;
the control mechanism controls the condenser and the bypass air valve to be opened and closed based on the environmental information so as to adjust the working mode of the indirect evaporative cooling unit, and the control mechanism comprises:
in response to the outdoor air inlet dry bulb temperature being greater than a first outdoor air inlet switching temperature threshold, the outdoor air inlet wet bulb temperature being less than or equal to a second outdoor air inlet switching temperature threshold and the air supply temperature being greater than an air supply temperature threshold, controlling the condenser and the bypass air valve to be closed so as to enable the indirect evaporative cooling unit to work in a second mode;
and controlling the outdoor side fan, the indoor side fan and the spraying mechanism to work so as to adjust the air supply temperature of the indirect evaporative cooling unit.
9. The control method according to claim 6, wherein the air outlet comprises a fresh air outlet and a return air outlet, and the indirect evaporative cooling unit further comprises: the outdoor side fan is arranged close to one side of the condenser, which is far away from the bypass air valve, the indoor side fan is arranged close to the return air outlet, and the spraying mechanism is arranged close to the fresh air outlet; the compression refrigeration mechanism further includes: the evaporator is arranged between the return air outlet and the indoor side fan, the compressor is connected with the condenser and the evaporator, and the electronic expansion valve is connected with the condenser and the evaporator;
the control mechanism controls the opening and closing of the condenser and the bypass air valve based on the environmental information so as to adjust the working mode of the indirect evaporative cooling unit, and the control mechanism comprises:
in response to the outdoor inlet air wet bulb temperature being greater than a second outdoor inlet air switching temperature threshold and the air supply temperature being greater than an air supply temperature threshold, controlling the condenser and the bypass air valve to be opened so that the indirect evaporative cooling unit works in a third mode;
and controlling the evaporator, the compressor, the electronic expansion valve and the spraying mechanism to work, and controlling the outdoor side fan and the indoor side fan to be opened so as to adjust the air supply temperature of the indirect evaporative cooling unit.
10. A storage medium, characterized in that the storage medium stores a computer program executable by a processor to implement the method of controlling an indirect evaporative cooling unit as claimed in any one of claims 6 to 9.
CN202210976034.9A 2022-08-15 2022-08-15 Indirect evaporative cooling unit, control method and storage medium Pending CN115426833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210976034.9A CN115426833A (en) 2022-08-15 2022-08-15 Indirect evaporative cooling unit, control method and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210976034.9A CN115426833A (en) 2022-08-15 2022-08-15 Indirect evaporative cooling unit, control method and storage medium

Publications (1)

Publication Number Publication Date
CN115426833A true CN115426833A (en) 2022-12-02

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Country Status (1)

Country Link
CN (1) CN115426833A (en)

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