Air conditioning system and control method therefor, computer device and computer-readable storage medium

Abstract

Provided in the present application are an air conditioning system, a control method and a computer-readable storage medium. The system comprises a main unit, a cooling tower and a combined cabinet, wherein a refrigeration side of the main unit is in circulating communication with a first heat exchanger inside the combined cabinet, and a cooling side of the main unit is connected to a cooling circulation pipeline of the cooling tower, characterized in that a second heat exchanger is further disposed on an air duct inside the combined cabinet and is connected to the cooling circulation pipeline of the cooling tower; and a valve assembly is disposed on the cooling circulation pipeline and is configured to adjust the flow of the cooling side of the main unit and the flow of the second heat exchanger.

Description

Air conditioning system, control method thereof, computer device and computer readable storage medium

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202410803351.X filed on June 20, 2024, and entitled "Air conditioning system, control method and computer readable storage medium", the content of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of mine air conditioning, in particular to an air conditioning system, a control method thereof, a computer device and a computer readable storage medium. BACKGROUND

[0004] With the increase of mining depth, mine heat damage is increasingly prominent, which seriously affects the health of underground workers and the safety production of coal mines. High temperature heat damage has become a bottleneck restricting the efficient mining of coal mines, resulting in a poor working environment, threatening the health of workers and affecting the normal operation of mechanical equipment. A mine refers to a place where minerals are mined underground, and high temperature heat damage refers to the increase in temperature in the deep part of the mine. At present, there are various types of equipment and technology for mine cooling, mostly using a multi-air conditioner combination cabinet air mixing system for cooling treatment.

[0005] The existing mine air conditioning system usually includes a cooling tower and a main machine. The cooling tower is used for cooling the main machine, and the main machine supplies cold energy to each combination cabinet. The combination cabinet delivers cold air to the underground through the air supply system, thereby achieving the cooling effect. However, due to the large temperature difference between the mine and the external environment, the external environment may be in a low temperature state, while the internal temperature of the mine is still high. The current mine air conditioning system cannot effectively utilize external cold energy to directly cool the mine, and cannot be fully optimized in combination with actual working conditions. SUMMARY

[0006] The present application proposes an air conditioning system, a control method thereof and a computer readable storage medium to solve the technical problem of low utilization efficiency of cooling water of the cooling tower in the prior art.

[0007] The present application proposes an air conditioning system, which comprises a main machine, a cooling tower and a combination cabinet. The main machine cooling side is in circulation communication with a first heat exchanger in the combination cabinet, and the main machine cooling side is connected to a cooling circulation pipeline of the cooling tower. The air duct in the combination cabinet is further provided with a second heat exchanger, and the second heat exchanger is connected to the cooling circulation pipeline of the cooling tower. A valve assembly is provided on the cooling circulation pipeline, which is used to open and close and adjust the flow of the main machine cooling side and the second heat exchanger.

[0008] In an embodiment, the valve assembly comprises a first electromagnetic valve, a first interface of the first electromagnetic valve being connected to the outlet of the cooling tower, a second interface of the first electromagnetic valve being connected to the inlet of the second heat exchanger, and a third interface of the first electromagnetic valve being connected to the cooling side inlet of the main machine.

[0009] In an embodiment, the valve assembly further comprises a second electromagnetic valve, a first interface of the second electromagnetic valve being connected to the outlet of the second heat exchanger, a second interface of the second electromagnetic valve being connected to the cooling side inlet of the main machine, and a third interface of the second electromagnetic valve being connected to the inlet of the cooling tower.

[0010] The application further provides a control method of an air conditioning system, applied to the air conditioning system as described above, comprising the steps of:

[0011] controlling the main machine of the air conditioning system to operate;

[0012] judging whether the difference between the inlet water temperature of the cooling tower and the ambient temperature is greater than a target difference;

[0013] controlling the flow rate of the main machine, the cooling side, and the second heat exchanger according to the judgment result.

[0014] In an embodiment, the valve assembly comprises a first electromagnetic valve, a first interface of the first electromagnetic valve being connected to the outlet of the cooling tower, a second interface of the first electromagnetic valve being connected to the inlet of the second heat exchanger, and a third interface of the first electromagnetic valve being connected to the cooling side inlet of the main machine. The control method further comprises: in response to the difference between the inlet water temperature of the cooling tower and the ambient temperature being greater than the target difference, controlling the first electromagnetic valve of the valve assembly to connect the first interface, the second interface, and the third interface; and in response to the difference between the inlet water temperature of the cooling tower and the ambient temperature being less than or equal to the target difference, controlling the first electromagnetic valve of the valve assembly to connect the first interface and the third interface.

[0015] In an embodiment, the main machine comprises a compressor; the valve assembly further comprises a second electromagnetic valve, a first interface of the second electromagnetic valve being connected to the outlet of the second heat exchanger, a second interface of the second electromagnetic valve being connected to the cooling side inlet of the main machine, and a third interface of the second electromagnetic valve being connected to the inlet of the cooling tower; after the first electromagnetic valve of the valve assembly is controlled to connect the first interface, the second interface, and the third interface, the method further comprises: detecting the actual load of the compressor and the high-low pressure difference, comparing the actual load with a preset load, and comparing the high-low pressure difference with a preset pressure difference; in response to the actual load being less than the preset load or the high-low pressure difference being less than the preset pressure difference, controlling the second electromagnetic valve to connect the first interface and the second interface.

[0016] In one embodiment, the main unit includes a compressor; the valve assembly further includes a second solenoid valve, the first port of the second solenoid valve being connected to the outlet of the second heat exchanger, the second port of the second solenoid valve being connected to the cooling side inlet of the main unit, and the third port of the second solenoid valve being connected to the inlet of the cooling tower; after the first solenoid valve of the control valve assembly is connected to the first port, the second port, and the third port, the method further includes: detecting the actual load and the high-low pressure difference of the compressor, and comparing the actual load with a preset load, and comparing the high-low pressure difference with a preset pressure difference; corresponding to the actual load being greater than or equal to the preset load, and the high-low pressure difference being greater than or equal to the preset pressure difference, controlling the second solenoid valve to connect to the first port and the third port.

[0017] In one embodiment, after the first solenoid valve of the control valve assembly is connected to the first interface, the second interface, and the third interface, the method further includes: detecting the high pressure of the host and comparing the high pressure of the host with a target pressure value; corresponding to the high pressure of the host being greater than or equal to the target pressure value, reducing the opening degree of the second interface of the first solenoid valve to reduce the flow rate through the second heat exchanger.

[0018] In one embodiment, after the first solenoid valve of the control valve assembly is connected to the first interface, the second interface, and the third interface, the method further includes: detecting the high pressure of the host and comparing the high pressure of the host with a target pressure value; corresponding to the high pressure of the host being less than the target pressure value, increasing the opening degree of the second interface of the first solenoid valve to increase the flow rate through the second heat exchanger.

[0019] In one embodiment, the combined cabinet further includes a fan; after the second solenoid valve controlling the valve assembly is connected only to the first interface and the second interface, the method further includes: detecting the supply air temperature of the combined cabinet and comparing the supply air temperature with a target supply air temperature; increasing the operating frequency of the fan of the combined cabinet when the supply air temperature of the combined cabinet is greater than or equal to the target supply air temperature; and decreasing the operating frequency of the fan of the combined cabinet when the supply air temperature of the combined cabinet is less than the target supply air temperature.

[0020] In one embodiment, the host includes a compressor; after the air conditioning system is started, the method further includes: detecting the chilled water temperature on the cooling side of the host, comparing the chilled water temperature with a target chilled water temperature; corresponding to the chilled water temperature being greater than or equal to the target chilled water temperature, turning on the compressor of the host for cooling; corresponding to the chilled water temperature being less than the target chilled water temperature, turning off the compressor of the host.

[0021] In one embodiment, the preset load ranges from 10% to 30%, and the preset differential pressure ranges from 150 kPa to 250 kPa.

[0022] In one embodiment, the preset load is 25% and the preset pressure difference is 200 kPa.

[0023] In one embodiment, the target pressure value ranges from 1000 kPa to 1400 kPa.

[0024] In one embodiment, the target pressure value is 1200 kPa.

[0025] This application also provides a computer device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program to perform any of the control methods described above.

[0026] This application also proposes a readable storage medium for storing a computer program, which, when executed by a processor, performs the aforementioned control method. Compared with the prior art, the cooling water of the cooling tower in this application can be directly delivered to the combined cabinet when the temperature requirements are met. The combined cabinet can directly utilize the cooling capacity of the cooling water to cool areas such as underground roadways or working faces. Furthermore, by supplying heat-exchanged cooling water to the cooling side of the refrigeration unit, the problem of difficulty in establishing pressure differential during low-load startup of the refrigeration unit can be solved. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a structural diagram of an existing air conditioning system;

[0029] Figure 2 is a structural diagram of an air conditioning system according to an embodiment of this application;

[0030] Figure 3 is a flowchart of a control method for an air conditioning system according to an embodiment of this application;

[0031] Figure 4 is a flowchart of a control method for an air conditioning system according to another embodiment of this application;

[0032] Figure 5 is a flowchart of the host start-up judgment in one embodiment of this application; 1. Host; 2. Cooling tower; 3. Combined cabinet; 41. First solenoid valve; 42. Second solenoid valve. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0034] The principles and structure of this application will be described in detail below with reference to the accompanying drawings and embodiments.

[0035] A mine cooling system and its control method are described in the related technology. As shown in Figure 1, the mine cooling system may specifically include: a cooling unit 100, a cooling combination cabinet 200, a cooling tower structure 300, and a water-driven pump 400.

[0036] The refrigeration unit 100 is located on the fresh air side and is used to circulate cooling water.

[0037] The cooling unit 200 is connected to one side of the refrigeration unit 100 and is used to cool the fresh air based on the mixed air configuration.

[0038] The cooling tower structure 300 is connected to the other side of the refrigeration unit 100 for heat exchange with exhaust air.

[0039] A hydraulically driven pump 400 is connected to the cooling tower structure 300 and is used to perform heat exchange on the cooling water in the cooling tower structure 300.

[0040] In the embodiments of the aforementioned related technologies, the mine refrigeration system may include a refrigeration unit 100, a cooling combination cabinet 200, a cooling tower structure 300, and a hydraulically driven pump 400. The refrigeration unit 100 may be located on the fresh air side of the system, circulating cooling water and supplying it for cooling.

[0041] The cooling unit 200 is connected to one side of the refrigeration unit 100. It can cool the fresh air passing through the refrigeration unit 100 based on the mixed air method, or it can introduce fresh air into the excavation face to cool the excavation face.

[0042] The cooling tower structure 300 is connected to the other side of the refrigeration unit 100 and comes into contact with the exhaust air. Heat exchange is carried out through the exhaust air to cool the cooling water.

[0043] The hydraulically driven pump 400 is connected to the cooling tower structure 300, driving the cooling water in the cooling tower structure 300 to circulate and contact with the exhaust air for heat exchange.

[0044] A refrigeration unit 100, located on the fresh air side, is used to circulate cooling water. A cooling combination cabinet 200, connected to one side of the refrigeration unit 100, is used to cool the fresh air based on a mixed air configuration. A cooling tower structure 300, connected to the other side of the refrigeration unit 100, is used for heat exchange with exhaust air. A hydraulic pump 400, connected to the cooling tower structure 300, is used to drive the cooling water in the cooling tower structure 300 for heat exchange. By cooling the cooling water in the cooling tower structure 300 based on exhaust air, and by using the same cooling water for the refrigeration unit 100, cooling combination cabinet 200, and cooling tower structure 300, the number of water branch pipes in the mine can be reduced, thereby improving the efficiency of mine production operations.

[0045] As can be seen from the existing technologies described above, current mine air conditioning systems cannot effectively utilize external cooling capacity to directly cool the mine, and cannot be fully optimized to suit actual working conditions. Furthermore, due to the typically large temperature difference between the mine and the external environment, the external environment may be at a low temperature, while the temperature inside the mine remains relatively high.

[0046] Based on this, as shown in Figure 2, this application proposes an air conditioning system, including: a main unit 1, a cooling tower 2, and a combination cabinet 3; the main unit 1 has a refrigerant circulation loop inside, and its chilled water inlet and outlet on the cooling side are circulated to the first heat exchanger 31 inside the combination cabinet 3 through a water system circulation pipe, supplying cooling to the first heat exchanger 31 of the combination cabinet 3; the cooling side is connected to the cooling circulation pipe of the cooling tower 2, and can be cooled by the cooling tower 2. The combination cabinet 3 also has a second heat exchanger 32 inside, which is also located on the air duct and connected to the cooling circulation pipe of the cooling tower 2. A valve assembly is provided on the cooling circulation pipe for adjusting the flow rate of the cooling side of the main unit 1 and the second heat exchanger 32; the valve assembly only connects to the cooling side of the main unit 1 or the second heat exchanger 32. The air conditioning system of this application can be a mine air conditioning system or other types of air conditioning systems with cooling towers.

[0047] In the embodiments of this application, the cooling water of the cooling tower 2 can be directly sent to the combination cabinet 3 when the temperature requirements are met. The combination cabinet 3 can directly use the cooling capacity of the cooling water to cool down the underground roadway or working face and other areas. Moreover, the cooling water of the cooling tower 2 does not need to be connected to the water system of the host 1 for supplying cooling water, which can avoid excessive pressure and reduce the complexity of the pipeline.

[0048] In a specific embodiment, the valve assembly includes a first solenoid valve 41. The three ports of the first solenoid valve 41 correspond sequentially to a, b, and c in the figure. The first port a of the first solenoid valve 41 is connected to the liquid outlet of the cooling tower 2, the second port b is connected to the liquid inlet of the second heat exchanger 32, and the third port c is connected to the cooling side liquid inlet of the main unit 1.

[0049] For example, if only the first port a and the second port b of the first solenoid valve 41 are connected, the cooling water of the cooling tower 2 will only flow through the second heat exchanger 32 of the combined cabinet 3. If only the first port a and the third port c of the first solenoid valve 41 are connected, the cooling water of the cooling tower 2 will only flow through the cooling side of the main unit 1. If the first port a, the second port b and the third port c of the first solenoid valve 41 are connected, the cooling water of the cooling tower 2 can flow through the cooling side of the main unit 1 and the second heat exchanger 32 of the combined cabinet 3 at the same time. The flow rate can be controlled by controlling the opening of the ports a, b and c.

[0050] In the embodiments of this application, adjusting the opening and closing of the second port b and the third port c of the first solenoid valve 41, as well as the opening degree, can control the flow of cooling water from the cooling tower 2 to the cooling side of the host 1 and the flow rate and on / off of the second heat exchanger 32, and can be adjusted accordingly for different operating conditions of the air conditioning system.

[0051] In a specific embodiment, the valve assembly includes a first solenoid valve 41 and a second solenoid valve 42. The three ports of the first solenoid valve 41 and the second solenoid valve 42 correspond sequentially to a, b, and c in the figure. The first port a of the first solenoid valve 41 is connected to the outlet of the cooling tower 2, the second port b is connected to the inlet of the second heat exchanger 32, and the third port c is connected to the cooling side inlet of the main unit 1. The first port a of the second solenoid valve 42 is connected to the outlet of the second heat exchanger 32, the second port b is connected to the cooling side inlet of the main unit 1, and the third port c is connected to the inlet of the cooling tower 2.

[0052] Adjusting the opening and closing of the second port b and the third port c of the first solenoid valve 41 can control the flow of cooling water from the cooling tower 2 to the cooling side of the main unit 1 and the flow rate and opening / closing of the second heat exchanger 32. The second solenoid valve 42 can control whether the cooling water flowing through the second heat exchanger 32 flows through the cooling side of the main unit 1, matching the operating load and pressure difference of the main unit 1, and improving the operating efficiency of the main unit 1.

[0053] Specifically, the aforementioned main unit 1 is a refrigeration main unit, including a compressor, evaporator, expansion valve, and condenser. The evaporator and condenser can be shell-and-tube evaporators and shell-and-tube condensers, respectively. The cooling side connected to the main unit 1 is the cooling water inlet pipe connected to the shell-and-tube condenser, and the cooling side connected to the main unit 1 is the chilled water inlet and outlet pipe connected to the shell-and-tube evaporator. The specific structure of this refrigeration main unit 1 will not be described in detail here.

[0054] Among them, the first heat exchanger 31 and the second heat exchanger 32 inside the combined cabinet 3 are both surface coolers, which can be installed sequentially on the air duct. In addition, the combined cabinet 3 is also equipped with a fan 33 in the air supply section, which is used to supply air to the roadway or working face inside the mine.

[0055] In addition, the cooling water circulation pipes and chilled water systems are equipped with corresponding circulating water pumps to provide water circulation power, which will not be elaborated here.

[0056] As shown in Figure 3, this application also proposes a control method for an air conditioning system, which uses the above-mentioned air conditioning system and specifically includes the following steps:

[0057] Control the operation of the main unit of the air conditioning system;

[0058] The inlet water temperature and ambient temperature of cooling tower 2 are measured once every time interval t2.

[0059] Determine whether the difference between the inlet water temperature of cooling tower 2 and the ambient temperature is greater than the target difference;

[0060] If so, the first solenoid valve 41 of the control valve assembly is connected to the first interface a, the second interface b and the third interface c;

[0061] If not, the first solenoid valve 41 of the control valve assembly is only connected to the first interface a and the third interface c.

[0062] In autumn and winter, when the ambient temperature is low and there is a certain temperature difference between the cooling water and the ambient temperature of cooling tower 2, some cooling water can be directly supplied to the combined cabinet 3 to improve the overall refrigeration efficiency. In spring and summer, when the ambient temperature is high and the temperature difference is small, the cooling water must prioritize meeting the cooling needs of the refrigeration unit 1 and not be directly supplied to the combined cabinet 3.

[0063] For example, the inlet water temperature of cooling tower 2 is 25 degrees Celsius, and the ambient temperature in winter is 5 degrees Celsius. The difference is 25 degrees Celsius, which is greater than the target difference of 5 degrees Celsius. The outlet water temperature of cooling tower 2 is about 10 degrees Celsius. At this time, some cooling water can be directly supplied to the second heat exchanger 32 of the combination cabinet 3, so as to directly utilize the cooling capacity of the external environment to reduce the temperature downhole.

[0064] In summer, the ambient temperature is 25 degrees Celsius. At this time, the difference is 0 degrees Celsius, which is less than the target difference of 5 degrees Celsius. The cooling water must prioritize the cooling needs of the refrigeration unit 1 and not directly supply cooling water to the combination cabinet 3.

[0065] As shown in Figure 5, specifically, after the air conditioning system is started, the chilled water temperature (outlet water temperature) on the cooling side of the main unit 1 is checked once every time interval t1; if the chilled water temperature is greater than or equal to the target chilled water temperature, the compressor of the main unit 1 is turned on to perform cooling; if the chilled water temperature is less than the target chilled water temperature, the compressor of the main unit 1 is turned off, and the compressor of the main unit 1 is not required to perform cooling further.

[0066] As shown in Figure 4, in a specific embodiment, after the first solenoid valve 41 of the control valve assembly is connected to the first interface a, the second interface b and the third interface c, the actual load and the high and low pressure difference of the compressor are detected once every time interval t4, and the actual load is compared with the preset load, and the high and low pressure difference is compared with the preset pressure difference. If the actual load is less than the preset load, or the high and low pressure difference is less than the preset pressure difference, the second solenoid valve 42 of the control valve assembly is only connected to the first interface a and the second interface b.

[0067] When the actual load of the compressor of the refrigeration unit 1 is low and the pressure difference between high and low is small, it is easy to have difficulty in establishing the pressure difference. At this time, the cooling water heated by the second heat exchanger 32 of the combination cabinet 3 is bypassed to the cooling side water inlet of the refrigeration unit 1 to increase the cooling water inlet temperature, which can effectively solve the problem of low load start-up and operation.

[0068] In a specific embodiment, after the first solenoid valve 41 of the control valve assembly is connected to the first interface a, the second interface b and the third interface c, the actual load and the high and low pressure difference of the compressor are detected once every time interval t4. If the actual load is greater than or equal to the preset load and the high and low pressure difference is greater than or equal to the preset pressure difference, the second solenoid valve 42 of the control valve assembly is connected only to the first interface a and the third interface c.

[0069] When there is no situation where the actual load of the refrigeration unit compressor is small and the high-low pressure difference is small, that is, there is no problem of pressure difference being difficult to establish, the cooling water flowing through the second heat exchanger 32 of the combination cabinet 3 can be directly connected to the cooling tower 2 to ensure that the refrigeration unit 1 meets the operating conditions.

[0070] In a further embodiment, after the second solenoid valve 42 of the control valve assembly is connected to the first interface a and the second interface b, the air supply temperature of the combination cabinet 3 is detected once every time interval t5, and the air supply temperature is compared with the target air supply temperature.

[0071] If the supply air temperature of the combination cabinet 3 is greater than or equal to the target supply air temperature, increase the operating frequency of the fan of the combination cabinet 3.

[0072] If the supply air temperature of the combination cabinet 3 is lower than the target supply air temperature, reduce the operating frequency of the fan in the combination cabinet 3.

[0073] Adjusting the fan frequency according to the supply air temperature allows the unit to adapt to cooling demands and improves energy efficiency.

[0074] In a specific embodiment, after the first solenoid valve 41 of the control valve assembly is connected to the first interface a, the second interface b and the third interface c, the high pressure of the host 1 is detected once every time interval t3; and the high pressure of the host 1 is compared with the target pressure value.

[0075] If the high pressure of the host 1 is less than the target pressure value, increase the opening degree of the second port b of the first solenoid valve 41 to increase the flow rate through the second heat exchanger 32 of the combined cabinet 3.

[0076] When the high pressure is low, it indicates that the cooling demand of the refrigeration unit 1 is not large, and more cooling water can be supplied to the combination cabinet 3 to improve the overall refrigeration efficiency.

[0077] In a specific embodiment, after the first solenoid valve 41 of the control valve assembly is connected to the first interface a, the second interface b and the third interface c, the high pressure of the host 1 is detected once every time interval t3; and the high pressure of the host 1 is compared with the target pressure value.

[0078] If the high pressure of the host 1 is greater than or equal to the target pressure value, reduce the opening of the second port b of the first solenoid valve 41 to reduce the flow rate through the second heat exchanger 32 of the combined cabinet 3.

[0079] When the high pressure of the chiller 1 is high, the cooling water of the cooling tower 2 must prioritize meeting the cooling needs of the chiller 1 in order to ensure that the chiller 1 can operate normally.

[0080] Specifically, the time periods t1, t2, t3, t4, and t5 can be set according to actual needs. Specifically, t1 can be set to 5 seconds, t2 to 10 seconds, t3 to 3 seconds, t4 to 7 seconds, and t5 to 20 seconds.

[0081] In addition to the values ​​mentioned above, the time period value can be flexibly adjusted to adapt to the actual equipment operating conditions and environmental conditions.

[0082] Specifically, the preset load setting range is 10%-30%, which can be set to 25%; the preset differential pressure setting range is 150KPa-250KPa, which can be set to 200KPa; and the target pressure value setting range is 1000KPa to 1400KPa, which can be set to 1200KPa.

[0083] This application also provides a computer device, including a processor and a memory. The memory stores a computer program, and the processor executes the above-described control method for an air conditioning system when executing the computer program.

[0084] This application also proposes a computer-readable storage medium storing a computer program that, when executed, performs the aforementioned control method for the air conditioning system.

[0085] In one or more exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functionality may be stored or transmitted as one or more instructions or code on or through a computer-readable medium. A computer-readable medium includes both computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. A storage medium may be any available medium accessible to a computer. By way of example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a computer. Any connection is also legitimately referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of a medium. As used in this article, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs. Disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of these should also be included within the scope of computer-readable media.

[0086] It should be noted that the terminology used above is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0087] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0088] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0089] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An air conditioning system, comprising: The system comprises a main unit, a cooling tower, and a combined cabinet. The cooling side of the main unit is circulatedly connected to a first heat exchanger within the combined cabinet, and the cooling side of the main unit is connected to the cooling circulation pipe of the cooling tower. The system is characterized in that a second heat exchanger is also provided on the air duct within the combined cabinet, and the second heat exchanger is connected to the cooling circulation pipe of the cooling tower. A valve assembly is provided on the cooling circulation pipe for opening, closing, and adjusting the flow rates of the main unit's cooling side and the second heat exchanger.

2. The air conditioning system as described in claim 1, characterized in that, The valve assembly includes a first solenoid valve, the first interface of which is connected to the outlet of the cooling tower, the second interface of which is connected to the inlet of the second heat exchanger, and the third interface of which is connected to the cooling side inlet of the main unit.

3. The air conditioning system as described in claim 2, characterized in that, The valve assembly further includes a second solenoid valve, the first interface of which is connected to the liquid outlet of the second heat exchanger, the second interface of which is connected to the cooling side liquid inlet of the main unit, and the third interface of which is connected to the liquid inlet of the cooling tower.

4. A control method for an air conditioning system, characterized in that, Applied to the air conditioning system of claim 1, characterized in that it includes the following steps: Controlling the operation of the main unit of the air conditioning system; The inlet water temperature of the cooling tower and the ambient temperature are measured. Determine whether the difference between the inlet water temperature of the cooling tower and the ambient temperature is greater than the target difference; Based on the judgment result, the flow rates of the cooling side of the host and the second heat exchanger are controlled.

5. The control method for an air conditioning system according to claim 4, characterized in that: The valve assembly includes a first solenoid valve, the first interface of which is connected to the outlet of the cooling tower, the second interface of which is connected to the inlet of the second heat exchanger, and the third interface of which is connected to the cooling side inlet of the main unit. The control method further includes: When the difference between the inlet water temperature and the ambient temperature of the cooling tower is greater than the target difference, the first solenoid valve of the control valve assembly connects the first interface, the second interface and the third interface. When the difference between the inlet water temperature and the ambient temperature of the cooling tower is less than or equal to the target difference, the first solenoid valve of the control valve assembly is connected to the first interface and the third interface.

6. The air conditioning control method as described in claim 5, characterized in that, The main unit includes a compressor; the valve assembly further includes a second solenoid valve, the first interface of the second solenoid valve being connected to the liquid outlet of the second heat exchanger, the second interface of the second solenoid valve being connected to the cooling side liquid inlet of the main unit, and the third interface of the second solenoid valve being connected to the liquid inlet of the cooling tower. After the first solenoid valve of the control valve assembly is connected to the first interface, the second interface, and the third interface, the method further includes: The actual load and high / low pressure difference of the compressor are detected, and the actual load is compared with the preset load, and the high / low pressure difference is compared with the preset pressure difference; When the actual load is less than the preset load, or the high-low pressure difference is less than the preset pressure difference, the second solenoid valve is controlled to connect the first interface and the second interface.

7. The air conditioning control method as described in claim 5, characterized in that, The main unit includes a compressor; the valve assembly further includes a second solenoid valve, the first interface of the second solenoid valve being connected to the liquid outlet of the second heat exchanger, the second interface of the second solenoid valve being connected to the cooling side liquid inlet of the main unit, and the third interface of the second solenoid valve being connected to the liquid inlet of the cooling tower. After the first solenoid valve of the control valve assembly is connected to the first interface, the second interface, and the third interface, the method further includes: The actual load and high / low pressure difference of the compressor are detected, and the actual load is compared with the preset load, and the high / low pressure difference is compared with the preset pressure difference; When the actual load is greater than or equal to the preset load, and the high-low pressure difference is greater than or equal to the preset pressure difference, the second solenoid valve is controlled to connect the first interface and the third interface.

8. The air conditioning control method as described in claim 5, characterized in that, After the first solenoid valve of the control valve assembly is connected to the first interface, the second interface, and the third interface, the method further includes: detecting the high pressure of the host and comparing the high pressure of the host with a target pressure value; corresponding to the high pressure of the host being greater than or equal to the target pressure value, reducing the opening degree of the second interface of the first solenoid valve to reduce the flow rate through the second heat exchanger.

9. The air conditioning control method as described in claim 5, characterized in that, After the first solenoid valve of the control valve assembly is connected to the first interface, the second interface, and the third interface, the method further includes: detecting the high pressure of the host and comparing the high pressure of the host with a target pressure value; corresponding to the high pressure of the host being less than the target pressure value, increasing the opening degree of the second interface of the first solenoid valve to increase the flow rate through the second heat exchanger.

10. The air conditioning control method as described in claim 6 or 7, characterized in that, The combined cabinet also includes a fan; after the second solenoid valve controlling the valve assembly is connected only to the first and second interfaces, the method further includes: The supply air temperature of the combined cabinet is detected, and the supply air temperature is compared with the target supply air temperature. If the supply air temperature of the combined cabinet is greater than or equal to the target supply air temperature, the operating frequency of the fan in the combined cabinet shall be increased. If the supply air temperature of the combined cabinet is lower than the target supply air temperature, the operating frequency of the fan in the combined cabinet shall be reduced.

11. The air conditioning control method as described in claim 4, characterized in that, The host unit includes a compressor; after the air conditioning system is started, the method further includes: Detect the chilled water temperature on the cooling side of the main unit and compare the chilled water temperature with the target chilled water temperature; If the chilled water temperature is greater than or equal to the target chilled water temperature, then the compressor of the main unit is turned on for cooling. If the chilled water temperature is lower than the target chilled water temperature, then the compressor of the main unit is turned off.

12. The air conditioning control method as described in claim 6 or 7, characterized in that, The preset load range is 10%-30%, and the preset pressure difference range is 150KPa-250KPa; Optionally, the preset load is 25% and the preset pressure difference is 200 kPa.

13. The air conditioning control method as described in claim 8 or 9, characterized in that, The target pressure value ranges from 1000 kPa to 1400 kPa; Optionally, the target pressure value is 1200 kPa.

14. A computer device comprising a processor and a memory, wherein, The memory stores a computer program, and when the processor executes the computer program, it performs the control method according to any one of claims 4 to 13.

15. A readable storage medium for storing a computer program, characterized in that, The computer program is executed by the processor to perform the control method according to any one of claims 4 to 13.

Images