Air conditioning system and control method thereof

Abstract

The present application relates to air conditioning technology field, particularly to an air conditioning system and a control method thereof, wherein the control method comprises: judging whether a unit meets a preset shutdown condition according to an actual temperature of a room; if yes, controlling the unit to operate in a state that a load is not greater than a preset load, and within a set time length of the operation: if the unit always meets the preset shutdown condition, controlling the unit to perform a shutdown operation; if the unit does not meet the preset shutdown condition, controlling the unit to adjust the actual temperature.The technical scheme of the present application can solve the problem of frequent start-stop of the unit in the air conditioning system, and achieve the purposes of reducing the energy consumption of the air conditioning system and increasing the service life of the unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, in particular to an air conditioning system and a control method thereof. BACKGROUND

[0002] At present, when the temperature in a room is adjusted by an air conditioning system, a commonly used control method is to control the start and stop of a unit according to the temperature in the room, that is, when the temperature in the room does not reach a set temperature, the unit is controlled to start or continue to work to adjust the temperature in the room, and when the temperature in the room reaches the set temperature, the unit is controlled to stop to stop adjusting the temperature in the room.

[0003] Based on the user's requirement for the air quality of the indoor space, many air conditioning systems currently have a fresh air component at the end, which can send outdoor air into the room to form fresh air blowing into the room, and filter, temperature adjustment and other treatments are performed on the space during the process of sending outdoor air into the room. Although the introduction of fresh air can improve the air quality in the room, it will also affect the temperature in the room, for example, in the case of high outdoor temperature, if fresh air is sent into the room, it will cause the temperature in the room to rise rapidly.

[0004] When the existing control method is used to control the air conditioning system, for example, when the air conditioning system is cooling, after the unit of the air conditioning system is controlled to be closed according to the temperature in the room reaching the set temperature, if the temperature in the room rises again and is greater than the set temperature, the unit needs to be controlled to start again, so that the phenomenon of frequent start and stop of the unit of the air conditioning system occurs. The frequent start and stop of the unit not only consumes a large amount of electric energy, causing waste of energy, but also increases the possibility of failure of the unit when the compressor in the unit starts, affecting the service life of the unit. SUMMARY

[0005] In view of the above problems, the present application is proposed to provide an air conditioning system and a control method thereof which can overcome the above problems or at least partially solve the above problems, and can solve the problem of frequent start and stop of the unit in the air conditioning system, so as to reduce the energy consumption of the air conditioning system and increase the service life of the unit.

[0006] Specifically, the present application provides a control method of an air conditioning system, comprising:

[0007] determining whether the unit meets a preset stop condition according to the actual temperature in the room;

[0008] if yes, controlling the unit to operate in a state of not greater than a preset load, and within a set time length of the operation:

[0009] if the unit always meets the preset stop condition, controlling the unit to perform a stop operation;

[0010] If the machine group does not satisfy the preset shutdown condition, the machine group is controlled to adjust the actual temperature.

[0011] According to one embodiment of the present application, the control of the machine group to operate under a condition that the load of the machine group is not greater than a preset load comprises:

[0012] If the load of the machine group is greater than the preset load, the load of the machine group is reduced to the preset load; and / or

[0013] If the load of the machine group is not greater than the preset load, the load of the machine group is controlled to remain unchanged.

[0014] According to one embodiment of the present application, the reduction of the load of the machine group to the preset load comprises:

[0015] The load of the machine group is gradually reduced to the preset load; and

[0016] During the reduction, if the machine group does not satisfy the preset shutdown condition, the machine group is controlled to adjust the actual temperature.

[0017] According to one embodiment of the present application, the gradual reduction of the load of the machine group to the preset load comprises:

[0018] The load of the machine group is periodically reduced by a preset step.

[0019] According to one embodiment of the present application, when the air conditioning system is in a cooling state, the preset shutdown condition comprises that the actual temperature is less than a difference between a set temperature and a start-stop hysteresis.

[0020] According to one embodiment of the present application, when the air conditioning system is in a heating state, the preset shutdown condition comprises that the actual temperature is greater than a difference between a set temperature and a start-stop hysteresis.

[0021] According to one embodiment of the present application, after the machine group is shut down, if the actual temperature does not satisfy the preset shutdown condition, the machine group is started to adjust the temperature.

[0022] According to one embodiment of the present application, the control of the machine group to adjust the actual temperature comprises:

[0023] The load of the machine group is controlled according to the actual temperature and a set temperature of the air conditioning system.

[0024] According to one embodiment of the present application, before the determination of whether the machine group satisfies the preset shutdown condition according to the actual temperature of the indoor, further comprises:

[0025] obtaining temperature detection values of a plurality of positions in the room; and

[0026] obtaining the actual temperature according to the plurality of temperature detection values.

[0027] In another aspect, the present application also provides an air conditioning system comprising a controller, wherein the controller comprises a processor and a memory, and the memory stores executable computer program instructions, and the processor is configured to execute the computer program instructions to implement the control method according to any one of the above aspects.

[0028] The technical solution provided by the present application is that, according to the actual temperature in the room, it is determined whether the unit of the air conditioning system meets the preset shutdown condition, if yes, the unit is controlled to operate in a state of not more than a preset load, and within a set time length of operation, if the unit always meets the preset shutdown condition, the unit is controlled to perform a shutdown operation, and if the unit does not meet the preset shutdown condition, the unit is controlled to adjust the actual temperature in the room. In the technical solution of the present application, when it is determined according to the actual temperature in the room that the unit meets the preset shutdown condition, the unit is not immediately controlled to perform the shutdown operation, but is controlled to operate in a state of not more than a preset load; if the unit always meets the preset shutdown condition within the set time length of operation, it can be determined that the fresh air does not affect the actual temperature in the room, and thus the unit can be controlled to perform the shutdown operation. Conversely, if the unit no longer meets the preset shutdown condition within the set time length of operation due to the fresh air, the unit is controlled to adjust the actual temperature in the room to ensure the control effect on the indoor environment. Since the unit is always in a started state during the whole process, the unit does not need to be started again when the unit is controlled to adjust the actual temperature in the room, so that the phenomenon of frequent start-stop of the unit can be reduced or even avoided, thereby reducing the energy consumption of the unit during the starting process and the damage to the unit, achieving the purposes of reducing the energy consumption of the air conditioning system and increasing the service life of the unit.

[0029] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] Some embodiments of the present application will be described in detail with reference to the drawings, wherein the same or like components have the same reference numerals, and wherein:

[0031] Figure 1 is a schematic flowchart of a control method of an air conditioning system according to an embodiment of the present application;

[0032] Figure 2is a schematic flowchart of controlling a unit to operate in a state of not more than a preset load according to an embodiment of the present application;

[0033] Figure 3 is a schematic flowchart of acquiring an actual temperature in a room according to an embodiment of the present application;

[0034] Figure 4 is a schematic flowchart of a control method of an air conditioning system according to another embodiment of the present application. DETAILED DESCRIPTION

[0035] Embodiments of an air conditioning system and a control method thereof will be described below with reference to Figures 1 to 4 In the description of the embodiments, it is to be understood that the terms "first", "second", "third" and the like, merely identify features belonging to different categories and do not imply or imply a relative importance or an implied indication of the number of features being referred to. Thus, a feature defined with "first", "second", "third" can explicitly or implicitly include at least one of the feature, i.e. one or more of the feature. In the description of the present application, the meaning of "a plurality of" is at least two, for example two, three, etc., unless otherwise specifically limited. When a certain feature "includes or contains" a certain or certain features, unless otherwise specifically described, it indicates that other features and can further include other features.

[0036] In the description of the embodiments, the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] Referring to Figure 1 , Figure 1 is a schematic flowchart of a control method of an air conditioning system according to an embodiment of the present application. In the present embodiment, the end of the air conditioning system is provided with a fresh air device for sending fresh air into the room, and by using the control method of the present embodiment, the phenomenon of frequent start-stop of the unit due to the influence of fresh air on the actual temperature in the room can be avoided, and the purpose of reducing the energy consumption of the air conditioning system and increasing the service life of the unit is achieved. The flowchart shown in Figure 1 will be described in detail.

[0038] As Figure 1 shown, the control method of the air conditioning system of the present embodiment comprises the following steps:

[0039] Step S1: Obtain the actual temperature of the indoor space.

[0040] In this embodiment, the indoor space refers to an indoor space equipped with an air conditioning system, and the air conditioning system can control the temperature of the indoor space according to the user's needs. When obtaining the actual temperature of the indoor space, a temperature sensor can be installed on the indoor unit of the air conditioning system to detect the actual temperature of the indoor space through the temperature sensor. A temperature detection device independent of the air conditioning system can also be provided in the indoor space, which sends the actual temperature of the indoor space to the air conditioning system after detecting the actual temperature of the indoor space, so that the air conditioning system obtains the actual temperature of the indoor space. In this embodiment, only the air conditioning system can obtain the actual temperature of the indoor space, and the specific obtaining method can be selected by the user according to the needs, and this embodiment does not have a restrictive requirement.

[0041] Step S2: Determine whether the unit meets the preset shutdown condition according to the actual temperature of the indoor space, and if so, perform step S3.

[0042] After obtaining the actual temperature of the indoor space, the actual temperature and the set temperature of the air conditioning system can be used to determine whether the unit meets the preset shutdown condition, wherein the set temperature of the air conditioning system refers to the temperature that the user sets on the air conditioning system. For example, when the air conditioning system is in a cooling state, if the actual temperature of the indoor space is not greater than the set temperature of the air conditioning system, the actual temperature of the indoor space has reached the user's expectation, and it can be determined that the unit meets the preset shutdown condition. Or when the air conditioning system is in a heating state, if the actual temperature of the indoor space is not less than the set temperature of the air conditioning system, it can also be determined that the unit meets the preset shutdown condition.

[0043] Step S3: Control the unit to operate in a state where the load is not greater than the preset load.

[0044] In this embodiment, in order to make the unit in a state where the load is not greater than the preset load, when the load of the unit is greater than the preset load, the unit can be operated to reduce the load of the unit so that the load of the unit is not greater than the preset load. Since the load of the unit is related to the power, in this embodiment, the power of the unit can be controlled to reduce the load of the unit. In order to facilitate the description of this technical solution, the state where the load is not greater than the preset load is referred to as a low load state, that is, this step S3 can be referred to as controlling the unit to operate in a low load state.

[0045] Step S4: Determine whether the unit has always met the preset shutdown condition within a set time period of controlling the unit to operate in a low load state.

[0046] In the embodiment, the timing can be started when the unit enters a low load state, and the actual indoor temperature can be acquired in real time during operation, and whether the unit meets the preset shutdown condition is determined according to the actual indoor temperature. If the unit meets the preset shutdown condition all the time when the timing duration reaches the set duration, step S5 is performed; if the unit does not meet the preset shutdown condition before the timing duration reaches the set duration, step S6 is performed.

[0047] Step S5: controlling the unit to perform a shutdown operation.

[0048] In the embodiment, the shutdown operation of the unit at least includes controlling the compressor to shut down, and when the compressor is controlled to shut down, the compressor can be directly controlled to shut down, or the frequency of the compressor can be gradually reduced until the compressor is shut down. The specific implementation mode can be selected according to the requirement of the user, and the embodiment does not have a restrictive requirement.

[0049] Step S6: controlling the unit to adjust the actual indoor temperature.

[0050] In the embodiment, the unit can be controlled by using the control method in the prior art, so that the air conditioning system provides a refrigerating capacity or a heating capacity to adjust the actual indoor temperature.

[0051] In summary, in the technical solution of the embodiment, whether the unit of the air conditioning system meets the preset shutdown condition is determined according to the actual indoor temperature, if yes, the unit is controlled to operate in a state of not greater than a preset load, and if the unit meets the preset shutdown condition all the time within a set duration of operation, the unit is controlled to perform a shutdown operation, and if the unit does not meet the preset shutdown condition, the unit is controlled to adjust the actual indoor temperature.

[0052] In the technical solution of the embodiment, when it is determined that the unit meets the preset shutdown condition according to the actual indoor temperature, the unit is not immediately controlled to perform a shutdown operation, but is controlled to operate in a state of not greater than a preset load. If the unit meets the preset shutdown condition all the time within a set duration of operation, it can be determined that the fresh air introduced into the indoor by the fresh air assembly does not affect the actual indoor temperature, and thus the unit can be controlled to perform a shutdown operation. Conversely, if the unit does not meet the preset shutdown condition within the set duration, the unit is controlled to adjust the actual indoor temperature to ensure the control effect on the indoor environment. Since the unit is always in a start state during the whole process, the unit does not need to be started again when the unit is controlled to adjust the actual indoor temperature, and thus the phenomenon of frequent start and stop of the unit can be reduced or even avoided, thereby reducing the energy consumption of the unit during the start process and the damage to the unit, achieving the purposes of reducing the energy consumption of the air conditioning system and increasing the service life of the unit.

[0053] In an embodiment of the present application, as shown in Figure 2As shown, in the control method of the air conditioning system in this embodiment, the method for controlling the unit to operate under low load conditions includes:

[0054] Step S201: Obtain the unit's load and determine whether the unit's load is greater than the preset load.

[0055] If yes, proceed to step S202; otherwise, proceed to step S203.

[0056] In this embodiment, the power of the unit (e.g., the power of the compressor in the unit) is first obtained, and the load of the unit is obtained based on the power of the unit. Then, the load is compared with the preset load to determine whether the load of the unit is greater than the preset load.

[0057] Step S202: Reduce the unit load to the preset load.

[0058] Step S203: Keep the load of the control unit constant.

[0059] The configuration method in this embodiment ensures that the load on the unit does not exceed the preset load, thereby improving the reliability of unit control.

[0060] It is understood that the method for controlling the unit to operate under low load conditions provided in this embodiment is exemplary and not restrictive. In other embodiments, other methods can be used to control the unit to operate under low load conditions. For example, when the unit's load is greater than the preset load, the unit's load can be reduced to a first set value not greater than the preset load; or when the unit's load is not greater than the preset load, the unit's load can be adjusted to a second preset value not greater than the preset load, etc.

[0061] In one embodiment of the present invention, the method for controlling the air conditioning system of this embodiment includes the following steps: when the load of the unit is greater than the preset load, the method for reducing the load of the unit to the preset load includes:

[0062] The load of the control unit is gradually reduced to the preset load, and if the unit does not meet the preset shutdown conditions during the reduction process, the control unit adjusts the actual temperature in the room.

[0063] When the unit load is reduced, directly lowering it to the preset load may cause the actual indoor temperature to be affected by the fresh air, resulting in the unit failing to meet the preset shutdown conditions. In this case, the unit load needs to be increased to regulate the actual indoor temperature, which not only increases energy consumption but also affects the user experience. Therefore, in this embodiment, when the unit fails to meet the preset shutdown conditions during load reduction, timely control of the unit to regulate the actual indoor temperature not only reduces energy waste but also prevents fluctuations in the actual indoor temperature, thereby improving the user experience.

[0064] The method of gradually reducing the load of the unit to the preset load will be described in detail below in combination with specific application scenarios. It can be understood that the method described below is exemplary and not limiting, and in other application scenarios, other methods can be used to control the gradual reduction of the load of the unit.

[0065] In an embodiment of the present application, the method of gradually reducing the load of the unit to the preset load comprises:

[0066] periodically reducing the load of the unit according to a preset step size until the load of the unit is the preset load.

[0067] In this embodiment, periodically reducing the load of the unit according to a preset step size means reducing the load of the unit once every adjustment period, and the amount of reduction each time is a set value, which is the preset step size.

[0068] Through the setting method of this embodiment, not only can the load of the unit be gradually reduced, but also the uniformity of the change in the load of the unit can be ensured, preventing the load of the unit from dropping too quickly, thereby improving the reliability of the control of the air conditioning system.

[0069] In an embodiment of the present application, when the air conditioning system is in a cooling state, the preset shutdown condition comprises: the actual temperature in the room is less than the difference between the set temperature and the start-stop hysteresis.

[0070] When the air conditioning system is in a cooling state, if the actual temperature in the room is less than the difference between the set temperature and the start-stop hysteresis, it can be considered that the actual temperature in the room has met the user's temperature control requirements for the room, and therefore it is determined that the unit meets the preset shutdown condition.

[0071] In an embodiment of the present application, when the air conditioning system is in a heating state, the preset shutdown condition comprises: the actual temperature in the room is greater than the difference between the set temperature and the start-stop hysteresis.

[0072] When the air conditioning system is in a heating state, if the actual temperature in the room is greater than the difference between the set temperature and the start-stop hysteresis, it can be considered that the actual temperature in the room has met the user's temperature control requirements for the room, and therefore it is determined that the unit meets the preset shutdown condition.

[0073] In the above two embodiments, the start-stop hysteresis is introduced into the preset shutdown condition of the unit when the air conditioning system is in a cooling state and in a heating state, respectively, wherein the start-stop hysteresis refers to the temperature return error of the air conditioning system during the shutdown process, and therefore the accuracy of determining whether the unit needs to be shut down can be improved, thereby improving the reliability of the control of the air conditioning system.

[0074] In one embodiment of the present application, when the control unit is stopped, if the actual temperature in the room does not meet the preset stopping condition, the control unit is started to adjust the actual temperature in the room.

[0075] In the present embodiment, when the control unit is stopped, if the actual temperature in the room does not meet the preset stopping condition, it can be considered that the actual temperature in the room does not meet the user's temperature control requirements for the room, and thus the control unit needs to be started to adjust the actual temperature in the room, so as to meet the user's temperature requirements for the room and achieve the purpose of improving the user experience.

[0076] In one embodiment of the present application, the control unit adjusts the actual temperature in the room, comprising:

[0077] Controlling the load of the control unit according to the actual temperature in the room and the set temperature of the air conditioning system.

[0078] For example, when the air conditioning system is in a cooling state, the cooling capacity required by the air conditioning system can be obtained according to the difference between the actual temperature in the room and the set temperature of the air conditioning system, and then the load of the control unit is controlled according to the cooling capacity to reduce the actual temperature in the room. Or, when the air conditioning system is in a heating state, the heating capacity required by the air conditioning system can be obtained according to the difference between the actual temperature in the room and the set temperature of the air conditioning system, and then the load of the control unit is controlled according to the heating capacity to increase the actual temperature in the room.

[0079] Through the setting mode of the present embodiment, the load of the control unit can be controlled according to the actual temperature in the room and the set temperature of the air conditioning system, so as to improve the reliability and accuracy of the control of the air conditioning system.

[0080] In one embodiment of the present application, the control method of the air conditioning system of the present embodiment further comprises the method for obtaining the actual temperature in the room as shown in Figure 3 The method comprises:

[0081] Step S301: Obtain the temperature detection values of multiple positions in the room.

[0082] In the present embodiment, corresponding temperature detection devices can be respectively arranged at multiple positions in the room, and each temperature detection device is connected with the air conditioning system. Each temperature detection device can detect the temperature of the corresponding position in the room and send the detection result to the air conditioning system, so that the air conditioning system obtains the temperature detection values of multiple positions in the room.

[0083] Step S302: Obtain the actual temperature in the room according to the temperature detection values of multiple positions in the room.

[0084] In the embodiment, the average of the temperature detection values of the plurality of positions can be taken as the actual temperature of the indoor. In other embodiments, the temperature detection values can be weighted according to the positions of the temperature detection devices, and then the average of the weighted temperature detection values can be taken as the actual temperature of the indoor. The user can select the way of obtaining the actual temperature of the indoor according to the plurality of temperature detection values, and the embodiment does not make more requirements.

[0085] The setting mode of the embodiment can obtain the actual temperature of the indoor according to the temperature detection values of the plurality of positions in the indoor, and compared with taking the temperature detection value of a position in the indoor as the actual temperature of the indoor, the accuracy of the obtained actual temperature of the indoor can be improved, and the reliability of the control of the air conditioning system is further ensured.

[0086] In an embodiment of the application, the flow of the control method of the air conditioning system of the application is as shown in Figure 4 The control method of the air conditioning system of the application comprises the following steps:

[0087] Step S21: normally adjusting the unit of the air conditioning system, and the normal adjustment comprises controlling the load of the unit according to the actual temperature of the indoor and the set temperature of the air conditioning system.

[0088] Step S22: judging whether the unit meets the preset shutdown condition according to the actual temperature of the indoor.

[0089] In the embodiment, the preset shutdown condition at least comprises that when the air conditioning system is in a cooling state, the actual temperature of the indoor is less than the difference between the set temperature and the start-stop hysteresis.

[0090] If yes, step S23 is performed.

[0091] Step S23: judging whether the load of the unit is greater than the preset load N1.

[0092] If yes, step S24 is performed; if no, step S27 is performed.

[0093] Step S24: reducing the load of the unit at a speed of reducing N2 load every T1 time length.

[0094] Step S25: judging whether the unit meets the preset shutdown condition in the process of reducing the load of the unit.

[0095] If no, step S21 is returned; if yes, step S26 is performed.

[0096] Step S26: judging whether the load of the unit is reduced to not greater than the preset load N1.

[0097] If yes, step S27 is performed; if yes, the load of the unit is continuously reduced.

[0098] Step S27: control the load of the unit to remain unchanged, and determine whether the unit consistently meets the preset shutdown condition within T2 time.

[0099] If yes, step S28 is performed: control the unit to perform shutdown operation.

[0100] The various embodiments described above can be combined in any manner, and the embodiments of the present application can achieve the following beneficial effects according to any one of the preferred embodiments described above or a combination of multiple preferred embodiments:

[0101] In the technical solution of the present embodiment, whether the unit of the air conditioning system meets the preset shutdown condition is determined according to the actual temperature in the room. If yes, the unit is controlled to operate at a state of not more than a preset load, and if the unit consistently meets the preset shutdown condition within a set time length of operation, the unit is controlled to perform shutdown operation. If the unit does not meet the preset shutdown condition, the unit is controlled to adjust the actual temperature in the room.

[0102] In the technical solution of the present embodiment, when it is determined that the unit meets the preset shutdown condition according to the actual temperature in the room, the unit is not immediately controlled to perform shutdown operation, but is controlled to operate at a state of not more than a preset load. If the unit consistently meets the preset shutdown condition within a set time length of operation, it can be determined that the fresh air introduced by the fresh air assembly into the room does not affect the actual temperature in the room, and thus the unit can be controlled to perform shutdown operation. Conversely, if the unit no longer meets the preset shutdown condition within the allowed set time length, the unit is controlled to adjust the actual temperature in the room to ensure the control effect on the indoor environment. Since the unit is always in a started state during the entire process, the unit does not need to be started again when the unit is controlled to adjust the actual temperature in the room, thereby reducing or even avoiding the frequent start-stop phenomenon of the unit, and thus reducing the energy consumption of the unit during start-up and the damage to the unit, achieving the purposes of reducing the energy consumption of the air conditioning system and increasing the service life of the unit.

[0103] In one embodiment, the application also provides an air conditioning system, comprising a controller, the controller comprising a processor and a memory, a communication interface and a communication bus, the processor, the memory and the communication interface accomplish communication with each other through the communication bus. The processor is used to provide computing and control capabilities. The memory comprises 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 operating system and computer program instructions in the non-volatile storage medium to run. The communication interface of the above device is used to communicate with external terminals in a wired or wireless manner. The wireless manner can be achieved through WIFI, operator network, NFC (Near Field Communication) or other technologies. The air conditioning system provided in the embodiment, the memory of the controller of the air conditioning system is used to store computer program instructions, and the computer program instructions can implement the plurality of embodiments of the control method of the air conditioning system when executed by the processor.

[0104] At this point, those skilled in the art will recognize that, while the present application has been shown and described in detail, the application can be embodied in many different forms without departing from the spirit and essential characteristics of the application. Therefore, the scope of the present application is not to be understood as being limited to the examples described herein.

Claims

1. A control method of an air conditioning system, characterized by, The method comprises: determining whether the unit meets preset shutdown conditions according to an actual temperature in a room; if yes, controlling the unit to operate in a state where a load of the unit is not greater than a preset load, and within a set time length of the operation: if the unit continues to meet the preset shutdown conditions, controlling the unit to perform a shutdown operation; if the unit does not meet the preset shutdown conditions, controlling the unit to adjust the actual temperature; the controlling the unit to operate in the state where the load of the unit is not greater than the preset load comprises: if the load of the unit is greater than the preset load, reducing the load of the unit to the preset load; and if the load of the unit is not greater than the preset load, controlling the load of the unit to remain unchanged; the reducing the load of the unit to the preset load comprises: controlling the load of the unit to gradually reduce to the preset load; and during the reducing, if the unit does not meet the preset shutdown conditions, controlling the unit to adjust the actual temperature.

2. The method according to claim 1, wherein the controlling the load of the unit to gradually reduce to the preset load comprises: periodically reducing the load of the unit according to a preset step.

3. The method according to claim 1, wherein when the air conditioning system is in a cooling state, the preset shutdown conditions comprise that the actual temperature is less than a difference between a set temperature and a start-stop hysteresis.

4. The method according to claim 1, wherein when the air conditioning system is in a heating state, the preset shutdown conditions comprise that the actual temperature is greater than a difference between a set temperature and a start-stop hysteresis.

5. The method according to claim 1, wherein if the actual temperature does not meet the preset shutdown conditions after the unit is shut down, controlling the unit to start to adjust the actual temperature.

6. The method according to any one of claims 1-5, wherein the controlling the unit to adjust the actual temperature comprises: controlling the load of the unit according to the actual temperature and a set temperature of the air conditioning system.

7. The method according to claim 1, wherein before the determining whether the unit meets the preset shutdown conditions according to the actual temperature in the room, the method further comprises: obtaining temperature detection values of multiple positions in the room; and obtaining the actual temperature according to the multiple temperature detection values.

8. An air conditioning system characterized by comprising: The method comprises a controller, the controller comprising a processor and a memory, wherein the memory stores executable computer program instructions, and the processor is configured to execute the computer program instructions to implement the method according to any one of claims 1-7.

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