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

Abstract

The present invention proposes an air conditioning system, a control method, and a computer-readable storage medium. The system includes: a main unit, a cooling tower, and a combination cabinet. The main unit cooling side is in circulation communication with a first heat exchanger in the combination cabinet, and the main unit cooling side is connected to the cooling circulation pipe of the cooling tower. The main unit is characterized in that a second heat exchanger is further provided on the air duct in the combination cabinet, and the second heat exchanger is connected to the cooling circulation pipe of the cooling tower. The valve assembly provided on the cooling circulation pipe is used to adjust the flow of the main unit cooling side and the second heat exchanger. The cooling water of the cooling tower of the present invention can be directly delivered to the combination cabinet when the temperature requirements are met. The combination cabinet can directly use the cooling capacity of the cooling water to cool areas such as underground tunnels or working faces. Moreover, by supplying the heat-exchanged cooling water to the cooling side of the refrigeration main unit, the problem of difficulty in establishing a low-load starting pressure difference for the refrigeration main unit can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of mine air conditioning, and in particular to an air conditioning system, a control method and a computer-readable storage medium. Background Art

[0002] As mines deepen, heat damage is becoming increasingly prominent, seriously impacting the health of underground workers and safe coal production. This leads to a harsh working environment, threatening worker health and affecting the proper operation of machinery and equipment. High-temperature heat damage has become a bottleneck restricting efficient coal mining. A mine refers to the underground excavation site where ore is mined, and high-temperature heat damage refers to the elevated temperatures deep within the mine. Currently, a wide variety of mine cooling equipment and technologies exist, most of which utilize mixed-air systems with multiple air conditioning cabinets.

[0003] Existing mine air conditioning systems typically consist of a cooling tower and a main unit. The cooling tower cools the main unit, which in turn supplies cooling energy to the individual cabinets. The cabinets then deliver cool air underground via an air supply system, achieving a cooling effect. However, due to the significant temperature difference between the mine and the external environment, the external environment can be cold while the internal temperature remains high. Current mine air conditioning systems are unable to effectively utilize external cooling energy to directly cool the mine, and are therefore not fully optimized for actual operating conditions. Summary of the Invention

[0004] In order to solve the technical problem of low cooling water utilization efficiency of cooling towers in the prior art, the present invention provides an air conditioning system, a control method and a computer-readable storage medium.

[0005] The technical solution adopted in the present invention is:

[0006] The present invention proposes an air-conditioning system, comprising: a main unit, a cooling tower and a combined cabinet, wherein the cooling side of the main unit is circulatedly connected to a first heat exchanger in the combined cabinet, and the cooling side of the main unit is connected to a cooling circulation pipe of the cooling tower. The system is characterized in that a second heat exchanger is further provided on the air duct in 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 to adjust the flow and opening and closing of the cooling side of the main unit and the second heat exchanger.

[0007] The valve assembly includes: a first solenoid valve, a first interface of the first solenoid valve is connected to the liquid outlet of the cooling tower, a second interface is connected to the liquid inlet of the second heat exchanger, and a third interface is connected to the cooling side liquid inlet of the host.

[0008] Furthermore, the valve assembly also includes: a second solenoid valve, the first interface of the second solenoid valve is connected to the liquid outlet of the second heat exchanger, the second interface is connected to the cooling side liquid inlet of the host, and the third interface is connected to the liquid inlet of the cooling tower.

[0009] The present invention also provides a method for controlling an air conditioning system, using the above-mentioned air conditioning system, comprising the steps of:

[0010] When the host of the air-conditioning system is running;

[0011] Determine whether the difference between the cooling tower's inlet water temperature and the ambient temperature is greater than the target difference;

[0012] If so, the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface;

[0013] If not, the first solenoid valve of the control valve assembly is connected to the first interface and the third interface.

[0014] Furthermore, after the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface;

[0015] 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 controlling the valve assembly is connected only to the first interface and the second interface.

[0016] Furthermore, after the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface;

[0017] If the actual load is greater than or equal to the preset load, and the high and low pressure differences are greater than or equal to the preset pressure differences, the second solenoid valve controlling the valve assembly is connected only to the first interface and the third interface.

[0018] Furthermore, after the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface, when the high pressure of the main engine is greater than or equal to the target pressure value; the opening of the second interface of the first solenoid valve is reduced to reduce the flow rate flowing through the second heat exchanger.

[0019] Furthermore, after the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface, when the high pressure of the main engine is less than the target pressure value; the opening of the second interface of the first solenoid valve is increased to increase the flow rate flowing through the second heat exchanger.

[0020] Furthermore, after the second solenoid valve of the valve assembly is controlled to be connected only to the first interface and the second interface;

[0021] If the air supply temperature of the combined cabinet is greater than or equal to the target air supply temperature, increasing the fan operating frequency of the combined cabinet;

[0022] If the air supply temperature of the combined cabinet is lower than the target air supply temperature, the fan operating frequency of the combined cabinet is reduced.

[0023] The present invention also provides a readable storage medium for storing a computer program that, when executed, executes the aforementioned control method. Compared to the prior art, the present invention allows cooling water from the cooling tower to be delivered directly to the modular cabinet when the required temperature is met. The modular cabinet can then directly utilize the cooling capacity of the cooling water to cool areas such as underground tunnels or working surfaces. Furthermore, by supplying heat-exchanged cooling water to the cooling side of the refrigeration unit, the difficulty in establishing a pressure differential during low-load startup of the refrigeration unit can be resolved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural diagram of the prior art;

[0026] Figure 2 is a structural diagram of an embodiment of the present invention;

[0027] Figure 3 is a flow chart of a specific embodiment of the present invention;

[0028] Figure 4 A flowchart of a main embodiment of the present invention;

[0029] Figure 5 This is a flowchart of host startup determination in an embodiment of the present invention;

[0030] 1. Host;

[0031] 2. Cooling tower;

[0032] 3. Combination cabinet;

[0033] 41. First solenoid valve; 42. Second solenoid valve. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0036] Existing patent application CN117846680A is a mine refrigeration system and its control method, such as Figure 1 As shown in the figure, the mine cooling system can specifically include the following components:

[0037] The refrigeration unit 100 is located on the fresh air side and is used to circulate the cooling water;

[0038] A cooling combination cabinet 200 is connected to one side of the refrigeration unit 100 and is used to cool the fresh air based on a mixed air form;

[0039] A cooling tower structure 300 is connected to the other side of the refrigeration unit 100 and is used for heat exchange with the exhaust air;

[0040] The hydraulically driven pump 400 is connected to the cooling tower structure 300 and is used for heat exchange of the cooling water in the cooling tower structure 300 .

[0041] In an embodiment of the present invention, a mine refrigeration system may include a refrigeration unit 100, a cooling cabinet assembly 200, a cooling tower structure 300, and a hydraulic pump 400. The refrigeration unit 100 may be located on the fresh air side of the system to circulate cooling water and circulate the cooling water for cooling.

[0042] The cooling assembly cabinet 200 is connected to one side of the refrigeration unit 100, and can cool the fresh air passing through the refrigeration unit 100 based on the mixed air form, and can also introduce fresh air into the excavation surface to cool the excavation surface.

[0043] The cooling tower structure 300 is connected to the other side of the refrigeration unit 100 and is in contact with the exhaust air. Heat exchange is performed through the exhaust air to cool the cooling water.

[0044] The hydraulically driven pump 400 is connected to the cooling tower structure 300 to circulate the driving cooling water in the cooling tower structure 300 and receive the exhaust air to perform heat exchange.

[0045] The refrigeration unit 100 is located on the fresh air side and is used to cool the cooling water in a circulation manner; the cooling combination cabinet 200 is connected to one side of the refrigeration unit 100 and is used to cool the fresh air based on the mixed air form; the cooling tower structure 300 is connected to the other side of the refrigeration unit 100 and is used to perform heat exchange with the exhaust air; the 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; by cooling the cooling water in the cooling tower structure 300 based on the exhaust air, and the cooling water of the refrigeration unit 100, the cooling combination cabinet 200 and the cooling tower structure 300 are shared, the water branch pipes in the mine can be reduced, and the mine production operation efficiency can be improved.

[0046] As can be seen from the above existing technologies, current mine air conditioning systems are unable to effectively utilize external cooling to directly cool the mine, and are not fully optimized for actual operating conditions. Furthermore, due to the large temperature difference between the mine and the external environment, the external environment may be cold while the temperature inside the mine remains high.

[0047] In this regard, Figure 2 As shown, the present invention proposes an air-conditioning system, specifically a mine air-conditioning system (it can also be other forms of air-conditioning systems with cooling towers), including: a main unit 1, a cooling tower 2 and a combination cabinet 3; a refrigerant circulation loop is provided inside the main unit 1, and the chilled water inlet and outlet of the cooling side thereof is circulated and connected to the first heat exchanger in the combination cabinet through the water system circulation pipeline, supplying cold to the first heat exchanger of the combination cabinet, and the cooling side is connected to the cooling circulation pipeline of the cooling tower, and can be cooled by the cooling tower; a second heat exchanger 32 is also provided inside the combination cabinet, and the second heat exchanger 32 is also located in the air duct, and the second heat exchanger 32 is connected to the cooling circulation pipeline of the cooling tower, and a valve assembly is provided on the cooling circulation pipeline for adjusting the flow of the main unit cooling side and the second heat exchanger, and for connecting only the main unit cooling side or the second heat exchanger.

[0048] That is, the cooling water of the cooling tower can be directly delivered to the combined cabinet when the temperature requirements are met. The combined cabinet can directly use the cold capacity of the cooling water to cool down the tunnels or working surfaces underground. Moreover, the cooling water of the cooling tower does not need to be connected to the water system of the main unit for supplying cooling water, which can avoid excessive pressure and reduce the complexity of the pipeline.

[0049] In a specific embodiment, the valve assembly includes: a first solenoid valve 41, the three interfaces of the first solenoid valve 41 correspond to a, b, and c in the figure in sequence; the first interface of the first solenoid valve 41 is connected to the liquid outlet of the cooling tower, the second interface b is connected to the liquid inlet of the second heat exchanger, and the third interface c is connected to the cooling side liquid inlet of the main unit.

[0050] For example, if only the first interface and the second interface of the first solenoid valve 41 are connected, the cooling water of the cooling tower will only flow through the second heat exchanger of the combination cabinet; if only the first interface and the third interface of the first solenoid valve are connected, the cooling water of the cooling tower will only flow through the cooling side of the main unit; if the first interface, the second interface and the third interface of the first solenoid valve are connected, the cooling water of the cooling tower can flow through the cooling side of the main unit and the second heat exchanger of the combination cabinet at the same time, and the flow rate can be controlled by controlling the opening of the interface.

[0051] That is, by adjusting the switch and opening size of the second and third interfaces of the first solenoid valve, the flow of cooling water from the cooling tower to the cooling side of the main unit and the flow and disconnection of the second heat exchanger can be controlled, and it can be adjusted according to different working conditions of the air-conditioning system.

[0052] In a specific embodiment, the valve assembly includes: a first solenoid valve 41 and a second solenoid valve 42, and the three interfaces of the first solenoid valve 41 and the second solenoid valve 42 correspond to a, b, and c in the figure in sequence; the first interface of the first solenoid valve 41 is connected to the liquid outlet of the cooling tower, the second interface is connected to the liquid inlet of the second heat exchanger, and the third interface is connected to the cooling side liquid inlet of the main unit; the first interface of the second solenoid valve 42 is connected to the liquid outlet of the second heat exchanger, the second interface is connected to the cooling side liquid inlet of the main unit, and the third interface is connected to the liquid inlet of the cooling tower.

[0053] That is, by adjusting the switch of the second interface and the third interface of the first solenoid valve, as well as the opening size, the flow of cooling water from the cooling tower to the cooling side of the host and the flow and disconnection of the second heat exchanger can be controlled, and the second solenoid valve can control whether the cooling water flowing through the second heat exchanger flows through the cooling side of the host, matching the operating load and pressure difference of the host, and improving the operating efficiency of the host.

[0054] Specifically, the host 1 is a refrigeration host, including a compressor, an evaporator, a throttle valve and a condenser, wherein the evaporator and the condenser can be specifically a shell and tube evaporator and a shell and tube condenser, and the cooling side connected to the host is a cooling water inlet pipe connected to the shell and tube condenser, and the cooling side connected to the host is a chilled water inlet and outlet connected to the shell and tube evaporator; the refrigeration host is a conventional structure in the prior art, which is not the focus of protection of the present invention and is not described in detail;

[0055] Among them, the first heat exchanger and the second heat exchanger 32 inside the combined cabinet 3 are both surface coolers, which can be arranged in sequence on the air duct. In addition, the combined cabinet is also provided with an air supply section to set a fan for supplying air to the tunnels or working faces inside the mine.

[0056] In addition, the cooling water circulation pipeline and the chilled water system are both equipped with corresponding circulating water pumps to provide water circulation power, which is very commonly used in the prior art. However, it is not the focus of protection of the present invention and will not be described in detail.

[0057] like Figure 3 As shown, the present invention also proposes a control method for an air-conditioning system, using the above-mentioned air-conditioning system, which specifically includes the following steps:

[0058] When the main unit of the air conditioning system is running;

[0059] The cooling tower's inlet water temperature and ambient temperature are detected once every time interval t2;

[0060] Determine whether the difference between the cooling tower's inlet water temperature and the ambient temperature is greater than the target difference;

[0061] If so, the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface;

[0062] If not, the first solenoid valve of the control valve assembly is only connected to the first interface and the third interface.

[0063] In autumn and winter, when the ambient temperature is low and there is a certain difference between the cooling water temperature and the cooling tower ambient temperature, part of the cooling water can be directly supplied to the combination cabinet to improve the refrigeration efficiency of the entire machine; in spring and summer, when the ambient temperature is high and the difference is small, the cooling water must first meet the cooling needs of the refrigeration host and is not directly provided to the combination cabinet.

[0064] For example, the cooling tower inlet water temperature is 25 degrees, and the ambient temperature in winter is 5 degrees. The difference is 25 degrees, which is greater than the target difference of 5 degrees. The cooling tower outlet water temperature is about 10 degrees. At this time, part of the cooling water can be directly supplied to the second heat exchanger of the combined cabinet, thereby directly utilizing the cold energy of the external environment to reduce the underground temperature.

[0065] In summer, the ambient temperature is 25 degrees. At this time, the difference is 0 degrees, which is less than the target difference of 5 degrees. The cooling water must first meet the cooling needs of the refrigeration host and is not directly provided to the combination cabinet.

[0066] like Figure 5 As shown, specifically, after the air-conditioning system is started, the chilled water temperature (outlet water temperature) on the cooling side of the host is detected once every time interval t1; if the chilled water temperature is greater than or equal to the target chilled water temperature, the host's compressor is turned on for cooling; if the chilled water temperature is less than the target chilled water temperature, the host's compressor is not turned on.

[0067] like Figure 4 As shown, in a specific 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 actual load and the high and low pressure difference of the compressor are detected once every time interval t4. 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 of the control valve assembly is connected only to the first interface and the second interface.

[0068] When the actual load of the refrigeration host compressor is low and the high and low pressure difference 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 of the combination cabinet is bypassed to the cooling side water inlet of the refrigeration host to increase the cooling water inlet temperature, which can effectively solve the low-load startup and operation problems.

[0069] In a specific 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 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 of the control valve assembly is connected only to the first interface and the third interface.

[0070] When the refrigeration main unit compressor has no actual load and the high and low pressure difference is small, there is no problem of difficulty in establishing the pressure difference. At this time, the cooling water flowing through the second heat exchanger of the combination cabinet can be directly connected to the cooling tower to ensure that the refrigeration main unit meets the operating conditions.

[0071] In a further embodiment, the second solenoid valve of the control valve assembly is only connected to the first interface and the second interface;

[0072] The air supply temperature of the modular cabinet is detected once every time interval t5;

[0073] If the supply air temperature of the modular cabinet is greater than or equal to the target supply air temperature, increase the fan operating frequency of the modular cabinet;

[0074] If the supply air temperature of the combined cabinet is lower than the target supply air temperature, reduce the fan operating frequency of the combined cabinet.

[0075] Adjust the fan frequency according to the supply air temperature so that the unit operation adapts to the cooling demand and improves energy efficiency.

[0076] In a specific embodiment, after the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface;

[0077] The high pressure of the host is detected once every time interval t3;

[0078] If the high pressure of the host is lower than the target pressure value, the opening of the second interface of the first solenoid valve is increased to increase the flow rate flowing through the second heat exchanger of the combination cabinet.

[0079] When the high-pressure pressure is low, it means that the cooling demand of the refrigeration host is not large, and more cooling water can be supplied to the combination cabinet to improve the refrigeration efficiency of the entire machine.

[0080] In a specific embodiment, after the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface;

[0081] The high pressure of the host is detected once every time interval t3;

[0082] If the high pressure of the host is greater than or equal to the target pressure value, the opening of the second interface of the first solenoid valve is reduced to reduce the flow through the second heat exchanger of the combination cabinet.

[0083] When the high pressure of the refrigeration host is high, the cooling water of the cooling tower must first meet the cooling needs of the refrigeration host to ensure the normal operation of the refrigeration host.

[0084] Specifically, the above time periods t1, t2, t3, t4, and t5 can be set according to actual needs. Specifically, t1 can be set to 5 seconds, t2 can be set to 10 seconds, t3 can be set to 3 seconds, t4 can be set to 7 seconds, and t5 can be set to 20 seconds.

[0085] In addition to the above values, the time period value can be flexibly adjusted to adapt to actual equipment working conditions and environmental conditions.

[0086] Specifically, the preset load setting range is 10%-30%, specifically 25%, the preset pressure difference setting range is 150KPa-250KPa, specifically 200KPa, and the target pressure value setting range is 1000KPa to 1400KPa, specifically 1200KPa.

[0087] The present invention also provides a computer-readable storage medium for storing a computer program, wherein the computer program executes the above-mentioned control method for the air-conditioning system when running.

[0088] In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or code. Computer-readable media includes both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one location to another. A storage medium may be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic 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 that can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using a 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 medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0089] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0090] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0091] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0092] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A control method for an air conditioning system, the air conditioning system comprising: A main unit, a cooling tower, and a combined cabinet, wherein the main unit cooling side is in circulation communication with a first heat exchanger in the combined cabinet, and the main unit cooling side is connected to a cooling circulation pipe of the cooling tower. It is characterized in that a second heat exchanger is further provided on the air duct in the combined cabinet, and the second heat exchanger is connected to a cooling circulation pipe of the cooling tower; a valve assembly is provided on the cooling circulation pipe to adjust the flow rate and opening and closing of the main unit cooling side and the second heat exchanger; The valve assembly includes: a first solenoid valve, wherein a first interface of the first solenoid valve is connected to a liquid outlet of the cooling tower, a second interface is connected to a liquid inlet of the second heat exchanger, and a third interface is connected to a cooling side liquid inlet of the host; The control method comprises the steps of: When the host of the air-conditioning system is running; Determine whether the difference between the cooling tower's inlet water temperature and the ambient temperature is greater than the target difference; If so, the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface; If not, the first solenoid valve of the control valve assembly is connected to the first interface and the third interface.

2. The control method of the air conditioning system according to claim 1, wherein: The valve assembly also includes: a second solenoid valve, the first interface of the second solenoid valve is connected to the liquid outlet of the second heat exchanger, the second interface is connected to the cooling side liquid inlet of the host, and the third interface is connected to the liquid inlet of the cooling tower.

3. The control method of the air conditioning system according to claim 1, wherein: After the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface; 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 controlling the valve assembly is connected only to the first interface and the second interface.

4. The control method of the air conditioning system according to claim 1, wherein: After the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface; If the actual load is greater than or equal to the preset load, and the high and low pressure differences are greater than or equal to the preset pressure differences, the second solenoid valve controlling the valve assembly is connected only to the first interface and the third interface.

5. The control method of the air conditioning system according to claim 1, wherein: After the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface, when the high pressure of the host is greater than or equal to the target pressure value; reducing the opening of the second interface of the first solenoid valve reduces the flow through the second heat exchanger.

6. The control method of the air conditioning system according to claim 1, wherein: After the first solenoid valve of the control valve assembly is connected to the first interface, the second interface and the third interface, when the high pressure of the host is less than the target pressure value; increasing the opening of the second interface of the first solenoid valve increases the flow rate flowing through the second heat exchanger.

7. The control method of the air conditioning system according to claim 2, wherein: After the second solenoid valve of the valve assembly is controlled to be connected only to the first interface and the second interface; If the air supply temperature of the combined cabinet is greater than or equal to the target air supply temperature, increasing the fan operating frequency of the combined cabinet; If the air supply temperature of the combined cabinet is lower than the target air supply temperature, the fan operating frequency of the combined cabinet is reduced.

8. A readable storage medium for storing a computer program, characterized in that: When the computer program is executed, the control method according to any one of claims 1 and 3 to 7 is executed.

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