Air conditioning system and control method thereof

Abstract

The present invention relates to the field of air treatment technology, and in particular to an air conditioning system and a control method thereof, wherein the control method comprises: obtaining a previously preset interconnection number of air conditioning units; in response to the air conditioning units with the previously preset interconnection number satisfying a preset condition, adjusting the previously preset interconnection number according to the preset condition to obtain a later preset interconnection number. The technical solution of the present application can adaptively adjust the previously preset interconnection number of air conditioning units according to the preset condition, thereby solving the problem of unchanged debugging of the number of interconnected units in the prior art, and matching the number of interconnected units with user requirements, thereby avoiding the shutdown of the air conditioning units due to too many interconnected air conditioning units, or the water temperature failing to meet user requirements for a long time due to too few interconnected air conditioning units, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment, and in particular to an air conditioning system and a control method thereof. Background Art

[0002] During the operation of a multi-machine interconnected air-conditioning system, the preset number of interconnections on the air-conditioning unit is fixed, so that all interconnected air-conditioning units are gradually started and stopped according to the temperature difference between the inlet water temperature and the set water temperature. When the number of interconnections is too large, the inlet water temperature will quickly reach the shutdown water temperature, causing all air-conditioning units to gradually shut down; when the number of interconnections is too small, the inlet water temperature will not be able to meet user requirements for a long time, resulting in a poor user experience. In the prior art, the number of interconnections is determined by manual debugging, but manual debugging has the problems of high experience requirements and long time consumption, which will lead to reduced debugging accuracy and reduced user experience. Moreover, due to seasonal climate changes, the fixed number of interconnections cannot meet all seasonal conditions, which will further reduce the user experience. Summary of the invention

[0003] In view of the above problems, the present invention is proposed to provide an air-conditioning system and a control method thereof that overcome the above problems or at least partially solve the above problems, which can solve the problem of inconvenient debugging of the number of interconnected units in the prior art and achieve the purpose of improving user experience.

[0004] Specifically, the present invention provides a control method for an air conditioning system, comprising:

[0005] Obtain the previously preset interconnection quantity of the air-conditioning unit;

[0006] In response to the air-conditioning units with the previously preset interconnection number satisfying a preset condition, the previously preset interconnection number is adjusted according to the preset condition to obtain a subsequent preset interconnection number.

[0007] According to an embodiment of the present invention, the air-conditioning units with a previously preset interconnected number satisfying a preset condition include:

[0008] The running time of the air-conditioning units of the previously preset interconnected number running at full load reaches the set time, and the temperature difference between the actually measured water temperature of the air-conditioning units and the preset water temperature is not less than the set temperature difference; and

[0009] The method for adjusting the previously preset interconnection quantity is: increasing the previously preset interconnection quantity.

[0010] According to an embodiment of the present invention, the air-conditioning units having a previously preset number of interconnections satisfying a preset condition further comprises:

[0011] Acquire a correspondence between the time value of the set time and the temperature difference value of the set temperature difference, wherein the set time has more than two time values;

[0012] In response to the running time reaching the Nth time value of the set time, the corresponding Nth temperature difference value is obtained according to the corresponding relationship, and the set temperature difference is assigned.

[0013] According to an embodiment of the present invention, the increasing the previously preset number of interconnections includes:

[0014] The previously preset interconnection quantity is increased by a first preset value.

[0015] According to an embodiment of the present invention, the air-conditioning units with a previously preset interconnected number satisfying a preset condition include:

[0016] The number of shutdowns of the previously preset number of air-conditioning units within the preset time period is at least the preset number of shutdowns; and

[0017] The method for adjusting the previously preset interconnection number is: reducing the previously preset interconnection number.

[0018] According to an embodiment of the present invention, the air-conditioning units having a previously preset number of interconnections satisfying a preset condition further comprises:

[0019] Obtaining a correspondence between a duration value of the preset time period and a value of the preset number of shutdown times, wherein the preset time period has more than two duration values;

[0020] In response to the operating time of the air-conditioning system reaching the Mth duration value of the preset time period, the corresponding Mth number value is obtained according to the corresponding relationship, and the preset shutdown number is assigned.

[0021] According to an embodiment of the present invention, reducing the previously preset number of interconnections includes:

[0022] The previously preset interconnection quantity is reduced by a second set value.

[0023] According to one embodiment of the present invention, the control method further includes:

[0024] In response to the air-conditioning system having a load reduction demand or a load requirement and the operation mode of the air-conditioning system being a single-machine control mode, the air-conditioning system is subjected to single-machine energy adjustment control.

[0025] According to one embodiment of the present invention, the control method further includes:

[0026] In response to the air-conditioning system having a loading demand and the air-conditioning system operating mode being a multi-machine control mode and the number of interconnected units being less than a preset interconnection number, controlling the air-conditioning system to load according to the preset interconnection number; and / or

[0027] In response to the air-conditioning system having a load reduction demand and the air-conditioning system operating mode being a multi-machine control mode, the air-conditioning system is controlled to reduce the load according to the preset interconnection quantity.

[0028] An air conditioning system comprises a processor and a memory, wherein the memory stores a computer program for being executed on the processor, and when the processor executes the computer program, the control method of the air conditioning system as described in any one of the above embodiments is implemented.

[0029] The technical solution provided by the present application first obtains the previously preset interconnection number of the air-conditioning unit, and when the air-conditioning unit with the previously preset interconnection number meets the preset condition, the previously preset interconnection number is adjusted according to the preset condition to obtain the later preset interconnection number. Since the technical solution of the present application can adaptively adjust the previously preset interconnection number of the air-conditioning unit according to the preset condition, it can solve the problem of unchanged debugging of the number of interconnected units in the prior art, and can match the number of interconnected units with the user's requirements, avoiding the shutdown of the air-conditioning unit due to too many interconnected air-conditioning units, or the water temperature cannot meet the user's requirements for a long time due to too few interconnected air-conditioning units, thereby improving the user experience.

[0030] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0032] Figure 1 is a flow chart of a method for controlling an air conditioning system according to an embodiment of the present invention;

[0033] Figure 2 The present invention is a flowchart of a method for determining whether an air-conditioning system has a loading requirement or a load reduction requirement according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0035] See also Figure 1 , Figure 1 What is shown is a flow chart of the control method of the air-conditioning system of the present application, wherein the air-conditioning system includes a plurality of air-conditioning units connected in parallel, each air-conditioning unit includes a refrigerant circulation system consisting of an evaporator, a condenser, a throttling device, a compressor, etc., so that each unit can be shut down independently relative to other units, wherein the inlet water temperature value and the outlet water temperature set for each chiller are consistent.

[0036] Figure 1 The control method of the air conditioning system shown can adaptively adjust the preset interconnection number of the interconnected air conditioning units in the air conditioning system to avoid too many or too few preset interconnection numbers of the interconnected air conditioning units, thereby improving the user experience. Figure 1 The process shown provides a detailed introduction to the control method of the air-conditioning system of the present application.

[0037] like Figure 1 As shown, the control method of the air conditioning system of the present application includes the following steps:

[0038] Step S1: Obtain the previously preset interconnection quantity of the air-conditioning unit;

[0039] Step S2: determining whether the preset interconnected number of air-conditioning units meets the preset conditions;

[0040] Step S3: If the conditions are met, the previously preset interconnection quantity is adjusted according to the above preset conditions to obtain the later preset interconnection quantity.

[0041] The control method provided by the present application can continuously adjust the preset number of interconnections during the operation of the air-conditioning system. When the control method of the present application is executed for the first time, the above-mentioned prior preset number of interconnections is the initial pre-set number of interconnections set by the staff in the air-conditioning system; after multiple adjustments to the preset number of interconnections, the prior preset number of interconnections is the subsequent preset number of interconnections obtained by the last adjustment; accordingly, the subsequent preset number of interconnections obtained after this adjustment can be used as the prior preset number of interconnections for the next adjustment.

[0042] The preset interconnection number in this embodiment is the optimal interconnection number used when controlling multiple machines in the air-conditioning system. This number is stored in the air-conditioning system, and when the preset interconnection number needs to be obtained, it can be obtained by data reading.

[0043] In summary, the technical solution provided by the present application first obtains the previously preset interconnection number of the air-conditioning unit, and then when the air-conditioning unit with the previously preset interconnection number meets the preset condition, the previously preset interconnection number is adjusted according to the preset condition to obtain the later preset interconnection number. Since the technical solution of the present application can adaptively adjust the previously preset interconnection number of the air-conditioning unit according to the preset condition, the number of interconnected units can be matched with the user's requirements, avoiding the shutdown of the air-conditioning unit due to too many interconnected air-conditioning units, or the water temperature cannot meet the user's requirements for a long time due to too few interconnected air-conditioning units, thereby improving the user experience.

[0044] The control method of the air-conditioning system provided in the present application can increase the number of previously preset interconnections or reduce the number of previously preset interconnections when adjusting the number of previously preset interconnections. The following, in combination with specific embodiments, the methods of increasing the number of preset interconnections and reducing the number of preset interconnections are respectively introduced accordingly.

[0045] In one embodiment, the air conditioning units with a previously preset interconnected number satisfying the preset conditions include: the running time of the air conditioning units with a previously preset interconnected number running at full load reaches the set time, and the temperature difference between the measured water temperature of the air conditioning units and the preset water temperature is not less than the set temperature difference. The above method for adjusting the previously preset interconnected number is: increasing the previously preset interconnected number.

[0046] In this embodiment, each air-conditioning unit is provided with a corresponding load threshold value, and when the load of the air-conditioning unit reaches the corresponding load threshold value, the air-conditioning unit can be considered to be running at full load. The loads of the air-conditioning units with a preset interconnected number are judged one by one to determine whether the air-conditioning units with a preset interconnected number are running at full load.

[0047] The measured water temperature of the above-mentioned air-conditioning unit refers to the water inlet temperature of the air-conditioning unit. In this embodiment, a temperature sensor can be set at the water inlet of the air-conditioning unit to detect the water inlet temperature of the air-conditioning unit. The water inlet temperature is the measured water temperature of the air-conditioning unit.

[0048] According to the setting method of this embodiment, when the air-conditioning units with a previously preset interconnected number meet the preset conditions within the set time, it can be considered that the heating or cooling capacity provided by the air-conditioning units with the previously preset interconnected number cannot meet the user's needs, so the previously preset interconnected number is increased to increase the heating or cooling capacity provided by the air-conditioning units when controlling the air-conditioning system.

[0049] In another embodiment, the previously preset interconnected number of air-conditioning units satisfying the preset condition further comprises: obtaining a correspondence between a time value of the set time and a temperature difference value of the set temperature difference, wherein the set time has more than two time values;

[0050] When the running time of the air-conditioning units with a preset number of interconnections running at full load reaches the Nth time value of the set time, the corresponding Nth temperature difference value is obtained according to the above correspondence, and the temperature difference value is assigned to the above set temperature difference.

[0051] For example, the above-mentioned set time may include three different time values, each time value being set with a corresponding temperature difference value. When the running time of the previously preset interconnected number of air-conditioning units at full load reaches any time value in the set time, the temperature value corresponding to the time value is obtained according to the corresponding relationship obtained in this embodiment, and if the temperature difference between the actual measured water temperature of the air-conditioning unit and the preset water temperature within the time value is not less than the temperature value, it is determined that the previously preset interconnected number of air-conditioning units meets the preset condition.

[0052] The setting method of this embodiment determines whether the number of previously preset interconnections needs to be increased based on multiple time values ​​and temperature values ​​corresponding to each time value. Compared with using only one time value and temperature value to determine whether the number of previously preset interconnections needs to be increased, the accuracy of the judgment can be improved and the reliability of increasing the number of previously preset interconnections can be improved.

[0053] In one embodiment, increasing the first preset interconnection number includes: increasing the first preset interconnection number by a first preset value. For example, the first preset value may be 1. When increasing the first preset interconnection number, the first preset interconnection number is increased by 1 to obtain the second preset interconnection number.

[0054] The preset conditions in the above embodiments are preset conditions for increasing the number of previously preset interconnections. The preset conditions for reducing the number of previously preset interconnections are introduced below in conjunction with specific embodiments. It can be understood that the preset conditions of the control method of the air-conditioning system provided by the present application may include preset conditions for increasing the number of previously preset interconnections or preset conditions for reducing the number of previously preset interconnections, or may include both preset conditions for increasing the number of previously preset interconnections and preset conditions for reducing the number of previously preset interconnections.

[0055] In one embodiment, the above preset condition is: within a preset time period, the number of shutdowns of the previously preset number is at least the preset number of shutdowns; the method of adjusting the previously preset number of interconnections is: reducing the previously preset number of interconnections to obtain the later preset number of interconnections.

[0056] When the air-conditioning system is controlled, if the measured water temperature of the air-conditioning unit reaches the preset shutdown water temperature, the interconnected air-conditioning units will be controlled to gradually shut down to reduce the heating or cooling capacity of the air-conditioning units, and the measured water temperature will be adjusted until the measured water level of the air-conditioning unit does not reach the preset shutdown water temperature, or all the air-conditioning units are shut down. Therefore, when the air-conditioning system is in the heating working mode, if all the air-conditioning units with a preset number of interconnections are shut down, it can be considered that the measured water temperature of the air-conditioning unit quickly rises to the heating shutdown water temperature due to the excessive number of air-conditioning units; when the air-conditioning system is in the cooling working mode, if all the air-conditioning units with a preset number of interconnections are shut down, it can be considered that the measured water temperature of the air-conditioning unit quickly drops to the cooling shutdown water temperature due to the excessive number of air-conditioning units.

[0057] In this embodiment, when the air-conditioning units with a previously preset number of interconnections meet the preset conditions within a preset time period, the previously preset number of interconnections is reduced. When the air-conditioning system is controlled, the heating or cooling capacity that can be provided by the air-conditioning units can be reduced, thereby preventing the air-conditioning units from being repeatedly started and causing damage to the air-conditioning units.

[0058] In another embodiment, the aforementioned previously preset interconnected number of air-conditioning units satisfying the preset condition further comprises: obtaining a correspondence between a duration value of the aforementioned preset time period and a value of the aforementioned preset number of shutdown times, wherein the aforementioned preset time period has more than two duration values;

[0059] When the operating time of the air-conditioning system reaches the Mth time value of the above-mentioned preset time period, the corresponding Mth number value is obtained according to the above-mentioned corresponding relationship, and the above-mentioned preset shutdown number is assigned.

[0060] For example, the above-mentioned preset time period may include three different duration values, and each duration value is set with a corresponding duration value. When the operation time of the air-conditioning system reaches any one of the duration values ​​in the above-mentioned preset time period, according to the corresponding relationship obtained in this embodiment, the number value corresponding to the duration value is obtained, and if the number of times all air-conditioning units are shut down within the duration value is at least the number value, it is determined that the air-conditioning units with the previously preset interconnected number meet the preset condition.

[0061] The setting method of this embodiment determines whether the number of previously preset interconnections needs to be reduced based on multiple time values ​​and temperature values ​​corresponding to each time value. Compared with using only one time value and temperature value to determine whether the number of previously preset interconnections needs to be reduced, the accuracy of the judgment can be improved and the reliability of reducing the number of previously preset interconnections can be improved.

[0062] In one embodiment, reducing the previously preset interconnection number includes: reducing the previously preset interconnection number by a second set value. For example, the second set value may be 1, and when reducing the previously preset interconnection number, the previously preset interconnection number is subtracted by 1 to obtain the later preset interconnection number.

[0063] The control method of the air conditioning system of the present application also includes a method for determining whether the air conditioning system has a loading demand or a load reduction demand according to the measured water temperature of the air conditioning unit. The process of the method is as follows: Figure 2 As shown, the following steps are included:

[0064] Step S21: obtaining the actual water temperature of the air-conditioning unit, where the actual water temperature is detected by a temperature sensor disposed at the water inlet of the air-conditioning unit.

[0065] Step S22: judging whether the air conditioning system has a loading requirement or a load reduction requirement according to the measured water temperature of the air conditioning unit, the judging method includes:

[0066] Get whether the air conditioning system is in heating mode or cooling mode;

[0067] When the air conditioning system is in heating mode:

[0068] Determine whether the measured water temperature of the air-conditioning unit is less than the first preset water temperature. If it is not less than, it can be considered that the heating capacity provided by the interconnected air-conditioning units can meet the heating demand of the user, and there is no need to increase the number of interconnected air-conditioning units, that is, the air-conditioning system has no loading demand. On the contrary, if it is less than, it can be considered that the heating capacity provided by the interconnected air-conditioning units cannot meet the heating demand of the user, and the number of interconnected air-conditioning units needs to be increased, that is, the air-conditioning system has a loading demand;

[0069] Determine whether the measured water level of the air-conditioning unit is greater than the third preset water temperature. If not, it can be considered that the heating amount provided by the current interconnected air-conditioning units does not exceed the user's heating demand, and there is no need to reduce the number of interconnected air-conditioning units, that is, the air-conditioning system has no load reduction demand; conversely, if greater, it can be considered that the heating amount provided by the interconnected air-conditioning units exceeds the user's heating demand, and the number of interconnected air-conditioning units needs to be reduced, that is, the air-conditioning system has a load reduction demand.

[0070] When the air conditioning system is in cooling mode:

[0071] Determine whether the water temperature at the water inlet of the air-conditioning unit is greater than the second preset water temperature. If not, it can be considered that the cooling capacity provided by the interconnected air-conditioning units can meet the user's cooling needs, and there is no need to increase the number of interconnected air-conditioning units, that is, the air-conditioning system has no loading demand; conversely, if greater, it can be considered that the cooling capacity provided by the interconnected air-conditioning units cannot meet the user's cooling needs, and the number of interconnected air-conditioning units needs to be increased, that is, the air-conditioning system has a loading demand.

[0072] Determine whether the water temperature at the water inlet of the air-conditioning unit is less than the fourth preset water temperature. If it is not, it can be considered that the cooling capacity provided by the interconnected air-conditioning units does not exceed the cooling demand of the user, and there is no need to reduce the number of interconnected air-conditioning units, that is, the air-conditioning system has no load reduction demand; conversely, if it is less than, it can be considered that the cooling capacity provided by the interconnected air-conditioning units exceeds the cooling demand of the user, and the number of interconnected air-conditioning units needs to be reduced, that is, the air-conditioning system has a load reduction demand.

[0073] In one embodiment, when the air-conditioning system has a load reduction demand or a load requirement, and the operation mode of the air-conditioning system is a single-machine control mode, the air-conditioning system is subjected to single-machine energy adjustment control.

[0074] In this embodiment, the air conditioning system has a single-machine working mode and a multi-machine working mode, wherein the single-machine working mode is to control only one unit to work to meet the control requirements; the multi-machine working mode is to control multiple units to work simultaneously to meet the control requirements, that is, the multi-machine working mode is a working mode of multiple machines interconnected. The control mode of the air conditioning system can be set by the user, or it can be automatically switched according to the actual situation. For example, the user can send control information to the air conditioning system through a remote control or an air conditioning system control device to control whether the air conditioning system is in a single-machine working mode or a multi-machine working mode; or, when the air conditioning system determines that the heating or cooling capacity provided in the single-machine working mode can meet the control requirements of the application scenario, the air conditioning system is controlled to be in a single-machine working mode; when it is determined that the heating or cooling capacity provided in the single-machine working mode cannot meet the control requirements of the application scenario, the air conditioning system is controlled to be in a multi-machine working mode.

[0075] In this embodiment, when the air conditioning system has a loading demand, if the air conditioning system is in a single-machine operation mode, the method for performing single-machine energy adjustment control on the air conditioning system includes:

[0076] When the air conditioning system is in heating mode, the heating capacity of the air conditioning unit is increased to improve the heating effect of the application scenario;

[0077] When the air conditioning system is in cooling working mode, the cooling capacity of the air conditioning unit is increased to improve the cooling effect for the application scenario.

[0078] When the air conditioning system has a load reduction requirement, if the air conditioning system is in a single-unit operation mode, the method for performing single-unit energy regulation control on the air conditioning system includes:

[0079] When the air conditioning system is in heating mode, the heating capacity of the air conditioning unit is reduced to reduce the heating effect on the application scenario;

[0080] When the air conditioning system is in cooling working mode, the cooling capacity of the air conditioning unit is reduced to reduce the cooling effect on the application scenario.

[0081] In one embodiment, if the air conditioning system has a loading demand and the operation mode of the air conditioning system is a multi-machine control mode, and the number of interconnected units is less than the above-mentioned preset interconnection number, the air conditioning system is controlled to load according to the preset interconnection number. In this embodiment, controlling the air conditioning system to load according to the preset interconnection number includes:

[0082] Determine whether the number of interconnected air-conditioning units is less than the current preset interconnection number;

[0083] If it is less than, the air-conditioning units are turned on one by one to increase the cooling capacity or heating capacity of the air-conditioning system until there is no load demand on the air-conditioning units, or the number of interconnected air-conditioning units is equal to the current preset interconnection number.

[0084] In one embodiment, if the air-conditioning system has a loading demand, the air-conditioning system is controlled to reduce the load according to the preset interconnection number. In this embodiment, controlling the air-conditioning system to reduce the load according to the preset interconnection number includes: when the air-conditioning system has a load reduction demand, controlling one of the interconnected air-conditioning units to shut down, and then determining whether the air-conditioning system has a load reduction demand, and if so, controlling one of the interconnected air-conditioning units to shut down until the air-conditioning system has no load reduction demand, so that the cooling capacity or heating capacity output by the air-conditioning system matches the user's demand.

[0085] The present invention also provides an air-conditioning system, including a control device and a plurality of air-conditioning units, wherein the control device includes a processor, a memory, a communication interface and a communication bus, and the processor, the memory and the communication interface communicate with each other through the communication bus. The processor is used to provide computing and control capabilities. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer program instructions. The internal memory provides an environment for the operation of the operating system and computer program instructions in the non-volatile storage medium. The communication interface of the control device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, an operator network, NFC (near field communication) or other technologies. The memory of the control device is used to store computer program instructions, and when the computer program instructions are executed by the processor, multiple embodiments of the control method of the air-conditioning system can be implemented.

[0086] The terms "first" or "second" and the like used in this specification to refer to numbers or ordinals are used for descriptive purposes only and are not to be understood as explicitly or implicitly indicating 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 the description of this specification, "plurality" means at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0087] Although this specification has shown and described a plurality of embodiments of the present invention, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, modifications and alternatives without departing from the thought and spirit of the present invention. It should be understood that in the process of practicing the present invention, various alternatives to the embodiments of the present invention described herein may be adopted. The attached claims are intended to define the scope of protection of the present invention, and therefore cover the modular composition, equivalent or alternatives within the scope of protection of these claims.

Claims

1. A control method for an air conditioning system, wherein the air conditioning system comprises a plurality of air conditioning units connected in parallel, characterized in that: include: Obtain the previously preset interconnection quantity of the air-conditioning unit; In response to the air-conditioning units of the previously preset interconnection number satisfying a preset condition, adjusting the previously preset interconnection number according to the preset condition to obtain a later preset interconnection number; The air-conditioning units with the previously preset interconnected number satisfying the preset conditions include: The running time of the air-conditioning units with the previously preset interconnection number at full load reaches the set time, and the temperature difference between the measured water temperature at the water inlet of the air-conditioning unit and the preset water temperature is not less than the set temperature difference; and the method of adjusting the previously preset interconnection number is: increasing the previously preset interconnection number; wherein the measured water temperature refers to the water inlet temperature of the air-conditioning unit; Alternatively, the air-conditioning units with the previously preset interconnected number satisfying the preset condition include: The number of shutdowns of the previously preset number of air-conditioning units within the preset time period is at least the preset number of shutdowns; and the method of adjusting the previously preset number of interconnections is: reducing the previously preset number of interconnections; The subsequent preset interconnection number obtained after this adjustment is used as the prior preset interconnection number for the next adjustment; wherein the prior preset interconnection number is the interconnection number used when the air conditioning system is controlled by multiple machines; In response to the air conditioning system having a loading demand and the air conditioning system operating mode being a multi-machine control mode and the number of interconnected units being less than a preset interconnection number, controlling the air conditioning system to load according to the preset interconnection number; and / or, In response to the air-conditioning system having a load reduction demand and the air-conditioning system operating mode being a multi-machine control mode, the air-conditioning system is controlled to reduce the load according to the preset interconnection quantity.

2. The control method according to claim 1, characterized in that: The air-conditioning units with a previously preset interconnected number satisfying a preset condition further includes: Acquire a correspondence between the time value of the set time and the temperature difference value of the set temperature difference, wherein the set time has more than two time values; In response to the running time reaching the Nth time value of the set time, the corresponding Nth temperature difference value is obtained according to the corresponding relationship, and the set temperature difference is assigned.

3. The control method according to claim 1 or 2, characterized in that: The increasing the previously preset number of interconnections includes: The previously preset interconnection quantity is increased by a first preset value.

4. The control method according to claim 1, characterized in that: The air-conditioning units with a preset interconnected number satisfying the preset conditions further include: Obtaining a correspondence between a duration value of the preset time period and a value of the preset number of shutdown times, wherein the preset time period has more than two duration values; In response to the operating time of the air-conditioning system reaching the Mth duration value of the preset time period, the corresponding Mth number value is obtained according to the corresponding relationship, and the preset shutdown number is assigned.

5. The control method according to claim 1, characterized in that: The reducing the previously preset number of interconnections includes: The previously preset interconnection quantity is reduced by a second set value.

6. The control method according to claim 4, characterized in that: The control method further comprises: In response to the air-conditioning system having a load reduction demand or a load requirement and the operation mode of the air-conditioning system being a single-machine control mode, the air-conditioning system is subjected to single-machine energy adjustment control.

7. An air conditioning system, characterized in that: It comprises a processor and a memory, wherein the memory stores a computer program for being executed on the processor, and when the processor executes the computer program, the control method according to any one of claims 1 to 6 is implemented.

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