Control method of air conditioning system, controller, air conditioning system, medium and product

Abstract

The embodiment of the invention provides a control method of an air conditioning system, a controller, the air conditioning system, a medium and a product, the air conditioning system comprises an outdoor unit, a plurality of indoor units and a plurality of electronic expansion valves, and the method comprises the steps that in a refrigeration mode, the operation frequency of the outdoor unit and the operation state of each indoor unit are obtained; under the condition that the operation frequency is larger than the preset frequency, according to the operation states of all the indoor units, a target indoor unit in the shutdown state is determined in the multiple indoor units, and the current temperature of a heat exchanger of the target indoor unit in the shutdown state is obtained; and the opening degree of the electronic expansion valve corresponding to the target indoor unit is adjusted through the current temperature of the heat exchanger. According to the embodiment of the invention, the opening degree of the corresponding electronic expansion valve can be adjusted according to the current temperature of the heat exchanger of the target indoor unit in the shutdown state, so that the refrigerant can be effectively prevented from flowing through the target indoor unit, the refrigeration effect of the multi-split air conditioner is improved, the flowing noise of the refrigerant is reduced, and the customer satisfaction is improved.

Description

Technical Field

[0001] The present application relates to the field of air-conditioning technology, and in particular to a control method, a controller, an air-conditioning system, a medium and a product of an air-conditioning system. Background Art

[0002] In the related art, as people's demand for high-quality life is growing, household multi-split systems are becoming more and more common. The working principle of the multi-split system is to work together with multiple indoor units through an outdoor unit. However, in actual use, not all indoor units will be turned on at the same time, and one or more indoor units will be in an off state. When the indoor valve body of one or more indoor units fails to close tightly, the refrigerant will still flow through these indoor units, resulting in poor cooling effect in the room where the indoor unit is running, and the room where the indoor unit is not turned on will produce noise due to the flow of refrigerant. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a control method, controller, air conditioning system, medium and product of an air conditioning system, aiming to improve the refrigeration effect of a multi-split unit and reduce the noise of refrigerant flow, thereby improving customer satisfaction.

[0004] In a first aspect, an embodiment of the present application provides a control method for an air-conditioning system, wherein the air-conditioning system comprises an outdoor unit, a plurality of indoor units, and a plurality of electronic expansion valves, wherein the plurality of indoor units are connected to the outdoor unit through the plurality of electronic expansion valves, and the plurality of indoor units and the plurality of electronic expansion valves are connected one-to-one, and the method comprises: In cooling mode, obtaining the operating frequency of the outdoor unit and the operating status of each of the indoor units; When the operating frequency is greater than a preset frequency, a target indoor unit in a shutdown state is determined among the plurality of indoor units according to the operating states of the indoor units, and a current temperature of a heat exchanger of the target indoor unit is obtained; The opening degree of the electronic expansion valve corresponding to the target indoor unit is adjusted according to the current temperature of the heat exchanger.

[0005] According to some embodiments of the present application, adjusting the opening of the electronic expansion valve corresponding to the target indoor unit according to the current temperature of the heat exchanger includes one of the following: When the current temperature of the heat exchanger is lower than the first preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit; When the current temperature of the heat exchanger is greater than or equal to the first preset temperature, the opening degree of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

[0006] According to some embodiments of the present application, when the current temperature of the heat exchanger is less than the first preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit includes: When the current temperature of the heat exchanger is lower than a first preset temperature, obtaining a first duration during which the current temperature of the heat exchanger is lower than the first preset temperature; When the first duration is greater than or equal to a first preset time, the opening degree of the electronic expansion valve corresponding to the target indoor unit is reduced based on a first adjustment range.

[0007] According to some embodiments of the present application, after reducing the opening of the electronic expansion valve corresponding to the target indoor unit based on the first adjustment amplitude, the method further includes one of the following: When the current temperature of the heat exchanger is lower than a second preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit; When the current temperature of the heat exchanger is greater than or equal to the second preset temperature, the opening degree of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

[0008] According to some embodiments of the present application, when the current temperature of the heat exchanger is less than the second preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit includes: When the current temperature of the heat exchanger is lower than a second preset temperature, obtaining a second duration during which the current temperature of the heat exchanger is lower than the second preset temperature; When the second duration is greater than or equal to a second preset time, the opening degree of the electronic expansion valve corresponding to the target indoor unit is reduced based on a second adjustment range.

[0009] According to some embodiments of the present application, after reducing the opening of the electronic expansion valve corresponding to the target indoor unit based on the second adjustment amplitude, the method further includes one of the following: When the current temperature of the heat exchanger is lower than a third preset temperature, determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and issuing a valve body leakage alarm message; When the current temperature of the heat exchanger is greater than or equal to the third preset temperature, the opening degree of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

[0010] According to some embodiments of the present application, when the current temperature of the heat exchanger is less than a third preset temperature, determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and issuing a valve body leakage alarm message, includes: When the current temperature of the heat exchanger is lower than a third preset temperature, obtaining a third duration during which the current temperature of the heat exchanger is lower than the third preset temperature; When the third duration is greater than or equal to a third preset time, it is determined that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and the valve body leakage alarm information is issued.

[0011] In a second aspect, an embodiment of the present application provides a controller comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method of the air-conditioning system of the first aspect mentioned above when running the computer program.

[0012] In a third aspect, an embodiment of the present application provides an air-conditioning system, comprising the controller of the second aspect described above.

[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the control method of the air-conditioning system as described in the first aspect above.

[0014] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program or computer instructions, characterized in that the computer program or the computer instructions are stored in a computer-readable storage medium, a processor of a computer device reads the computer program or the computer instructions from the computer-readable storage medium, and the processor executes the computer program or the computer instructions, so that the computer device executes the control method of the air-conditioning system as described in the first aspect above.

[0015] According to the technical solution of the embodiment of the present application, at least the following beneficial effects are achieved: the embodiment of the present application proposes a control method, a controller, an air conditioning system, a medium and a product for an air conditioning system, wherein the air conditioning system includes an outdoor unit, a plurality of indoor units and a plurality of electronic expansion valves, wherein the method includes: in a cooling mode, obtaining the operating frequency of the outdoor unit and the operating status of each indoor unit; when the operating frequency is greater than a preset frequency, determining the target indoor unit in the shutdown state among the plurality of indoor units through the operating status of each indoor unit, and obtaining the current temperature of the heat exchanger of the target indoor unit in the shutdown state, thereby adjusting the opening of the electronic expansion valve corresponding to the target indoor unit through the current temperature of the heat exchanger. Since the embodiment of the present application can adjust the opening of the corresponding electronic expansion valve according to the current temperature of the heat exchanger of the target indoor unit in the shutdown state, it can effectively prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit, and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0018] Figure 1 is a structural schematic diagram of an air conditioning system provided by an embodiment of the present application; Figure 2 is a flow chart of a control method of an air conditioning system provided by an embodiment of the present application; Figure 3 is a flow chart of a control method of an air conditioning system provided by another embodiment of the present application; Figure 4 is a flow chart of a control method of an air conditioning system provided by another embodiment of the present application; Figure 5 is a flow chart of a control method of an air conditioning system provided by another embodiment of the present application; Figure 6 is a flow chart of a control method of an air conditioning system provided by another embodiment of the present application; Figure 7 is a flow chart of a control method of an air conditioning system provided by another embodiment of the present application; Figure 8 is a flow chart of a control method of an air conditioning system provided by another embodiment of the present application; Fig. 9 is an overall flow chart of a control method for an air conditioning system provided by an embodiment of the present application; Fig.10 is an overall flow chart of a control method for an air conditioning system provided by another embodiment of the present application; Fig.11 is an overall flow chart of a control method for an air conditioning system provided by another embodiment of the present application; Fig.12 It is a schematic diagram of a controller for executing a control method of an air-conditioning system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0020] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0023] In some cases, as people's demand for high-quality life grows, household multi-split systems are becoming more and more common. The working principle of the multi-split system is to work with multiple indoor units through an outdoor unit. However, in actual use, not all indoor units are turned on at the same time, and one or more indoor units are not turned on. When the indoor valve body of one or more indoor units is not tightly closed, the refrigerant will still flow through these indoor units, resulting in poor cooling effect in the room where the indoor unit is running, and the room where the indoor unit is not turned on will produce noise due to the flow of refrigerant.

[0024] Based on the above situation, the embodiments of the present application propose a control method, controller, air conditioning system, medium and product of an air conditioning system, aiming to improve the cooling effect of a multi-split unit and reduce the noise of refrigerant flow, thereby improving customer satisfaction.

[0025] Various embodiments of the air conditioning system of the present application are further described below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, Figure 1 It is a structural schematic diagram of an air conditioning system provided by an embodiment of the present application.

[0027] In one embodiment, the air conditioning system is provided with an outdoor unit 100 , a plurality of indoor units 200 , and a plurality of electronic expansion valves 300 .

[0028] It should be noted that the multiple indoor units 200 and the multiple electronic expansion valves 300 are connected in a one-to-one correspondence, and the multiple indoor units 200 are connected to the outdoor unit 100 through the multiple electronic expansion valves 300.

[0029] Based on the hardware structure of the air-conditioning system in each of the above-mentioned embodiments, various embodiments of the control method of the air-conditioning system of the present application are respectively proposed below.

[0030] like Figure 2 As shown, Figure 2 It is a flowchart of a control method of an air-conditioning system provided by an embodiment of the present application; the control method of the air-conditioning system may include but is not limited to step S210, step S220 and step S230.

[0031] Step S210: in cooling mode, obtaining the operating frequency of the outdoor unit and the operating status of each indoor unit; Step S220: when the operating frequency is greater than the preset frequency, a target indoor unit in a shutdown state is determined among the multiple indoor units according to the operating states of the indoor units, and the current temperature of the heat exchanger of the target indoor unit is obtained; Step S230: adjusting the opening of the electronic expansion valve corresponding to the target indoor unit according to the current temperature of the heat exchanger.

[0032] In one embodiment, in cooling mode, the operating frequency of the outdoor unit and the operating status of each indoor unit are obtained; when the operating frequency is greater than a preset frequency, the target indoor unit in the shutdown state is determined among multiple indoor units through the operating status of each indoor unit, and the current temperature of the heat exchanger of the target indoor unit is obtained, so that the opening of the electronic expansion valve corresponding to the target indoor unit is adjusted according to the current temperature of the heat exchanger.

[0033] It is worth noting that since the embodiment of the present application can adjust the opening of the corresponding electronic expansion valve according to the current temperature of the heat exchanger of the target indoor unit in the shutdown state, it can effectively prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split system and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0034] It can be understood that the above-mentioned preset frequency can be 0 Hz and can be set according to actual conditions. The embodiment of the present application does not make any specific limitation on it.

[0035] It can be understood that the current temperature of the heat exchanger includes the middle temperature of the heat exchanger and / or the outlet temperature of the heat exchanger.

[0036] It can be understood that the embodiment of the present application can adjust the opening of the electronic expansion valve corresponding to the target indoor unit according to the middle temperature of the heat exchanger.

[0037] It can be understood that the embodiment of the present application can adjust the opening of the electronic expansion valve corresponding to the target indoor unit according to the outlet temperature of the heat exchanger.

[0038] It can be understood that the embodiment of the present application can adjust the opening of the electronic expansion valve corresponding to the target indoor unit according to the middle temperature of the heat exchanger and the outlet temperature of the heat exchanger.

[0039] In addition, if Figure 3 As shown, Figure 3 It is a flowchart of a control method of an air-conditioning system provided by another embodiment of the present application; regarding the above-mentioned step S230, it may include but is not limited to step S310 and step S320.

[0040] Step S310: when the current temperature of the heat exchanger is lower than the first preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit; Step S320: When the current temperature of the heat exchanger is greater than or equal to the first preset temperature, the opening of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

[0041] It can be understood that when the current temperature of the heat exchanger is lower than the first preset temperature, it indicates that refrigerant is flowing through the target indoor unit. Therefore, controlling the opening of the electronic expansion valve corresponding to the target indoor unit to be reduced can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0042] It is understandable that when the current temperature of the heat exchanger is greater than or equal to the first preset temperature, it means that no refrigerant flows through the target indoor unit, and therefore, there is no need to change the opening of the electronic expansion valve corresponding to the target indoor unit.

[0043] Exemplarily, when the temperature in the middle of the heat exchanger is lower than the first preset temperature, it indicates that refrigerant is flowing through the target indoor unit. Therefore, controlling the opening of the electronic expansion valve corresponding to the target indoor unit to be reduced can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0044] Exemplarily, when the outlet temperature of the heat exchanger is lower than the first preset temperature, it indicates that refrigerant is flowing through the target indoor unit. Therefore, controlling the opening of the electronic expansion valve corresponding to the target indoor unit to be reduced can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0045] Exemplarily, when the middle temperature of the heat exchanger and the outlet temperature of the heat exchanger are both lower than the first preset temperature, it indicates that refrigerant is flowing through the target indoor unit. Therefore, controlling the opening of the electronic expansion valve corresponding to the target indoor unit to be reduced can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0046] It can be understood that the first preset temperature mentioned above can be 10° C. and can be set according to actual conditions. The embodiment of the present application does not specifically limit it.

[0047] In addition, if Figure 4 As shown, Figure 4 It is a flow chart of a control method of an air-conditioning system provided by another embodiment of the present application; regarding the above-mentioned step S310, it may include but is not limited to step S410 and step S420.

[0048] Step S410: when the current temperature of the heat exchanger is lower than the first preset temperature, obtaining a first duration during which the current temperature of the heat exchanger is lower than the first preset temperature; Step S420: When the first duration is greater than or equal to the first preset time, the opening degree of the electronic expansion valve corresponding to the target indoor unit is reduced based on the first adjustment amplitude.

[0049] In one embodiment, when the current temperature of the heat exchanger is less than the first preset temperature, a first duration during which the current temperature of the heat exchanger is less than the first preset temperature is obtained. When the first duration is greater than or equal to the first preset time, it indicates that refrigerant is flowing through the target indoor unit. Therefore, the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment amplitude, which can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0050] It can be understood that by adjusting the opening of the electronic expansion valve corresponding to the target heat exchanger according to the current temperature of the heat exchanger and the first duration, the refrigerant can be better prevented from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0051] It can be understood that the above-mentioned first preset time can be 10 minutes, which can be set according to actual conditions, and the embodiment of the present application does not make any specific limitation on it.

[0052] It can be understood that the above-mentioned first adjustment amplitude can be 196P, which can be set according to actual conditions, and the embodiment of the present application does not make any specific limitation on it.

[0053] In addition, if Figure 5 As shown, Figure 5 It is a flow chart of a control method for an air-conditioning system provided by another embodiment of the present application; after reducing the opening of the electronic expansion valve corresponding to the target indoor unit based on the first adjustment amplitude, it may include but is not limited to step S510 and step S520.

[0054] Step S510: when the current temperature of the heat exchanger is lower than the second preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit; Step S520: When the current temperature of the heat exchanger is greater than or equal to the second preset temperature, the opening of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

[0055] It can be understood that after reducing the opening of the electronic expansion valve corresponding to the target indoor unit according to the first adjustment amplitude, if the current temperature of the heat exchanger is lower than the second preset temperature, it means that refrigerant is still flowing through the target indoor unit. Therefore, controlling the opening of the electronic expansion valve corresponding to the target indoor unit to be reduced can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0056] It can be understood that after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment range, if the current temperature of the heat exchanger is greater than or equal to the second preset temperature, it means that after adjusting the opening of the electronic expansion valve, no refrigerant flows through the target indoor unit. Therefore, there is no need to change the opening of the electronic expansion valve corresponding to the target indoor unit.

[0057] It can be understood that the second preset temperature mentioned above can be 10° C. and can be set according to actual conditions. The embodiment of the present application does not specifically limit it.

[0058] Exemplarily, after reducing the opening of the electronic expansion valve corresponding to the target indoor unit according to the first adjustment amplitude, if the middle temperature of the heat exchanger is lower than the second preset temperature, it means that refrigerant is still flowing through the target indoor unit. Therefore, controlling the opening of the electronic expansion valve corresponding to the target indoor unit to be reduced can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0059] Exemplarily, after reducing the opening of the electronic expansion valve corresponding to the target indoor unit according to the first adjustment amplitude, if the heat exchanger outlet temperature is lower than the second preset temperature, it means that refrigerant is still flowing through the target indoor unit. Therefore, controlling the opening of the electronic expansion valve corresponding to the target indoor unit to be reduced can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0060] Exemplarily, after reducing the opening of the electronic expansion valve corresponding to the target indoor unit according to the first adjustment amplitude, if the middle temperature of the heat exchanger and the outlet temperature of the heat exchanger are both lower than the second preset temperature, it means that refrigerant is still flowing through the target indoor unit. Therefore, controlling the opening of the electronic expansion valve corresponding to the target indoor unit to be reduced can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0061] In addition, if Figure 6 As shown, Figure 6 It is a flowchart of a control method of an air-conditioning system provided by another embodiment of the present application; regarding the above-mentioned step S510, it may include but is not limited to step S610 and step S620.

[0062] Step S610: when the current temperature of the heat exchanger is lower than the second preset temperature, obtaining a second duration during which the current temperature of the heat exchanger is lower than the second preset temperature; Step S620: When the second duration is greater than or equal to the second preset time, the opening degree of the electronic expansion valve corresponding to the target indoor unit is reduced based on the second adjustment amplitude.

[0063] In one embodiment, when the current temperature of the heat exchanger is less than the second preset temperature, a second duration during which the current temperature of the heat exchanger is less than the second preset temperature is obtained. When the second duration is greater than or equal to the second preset time, it indicates that refrigerant is still flowing through the target indoor unit. Therefore, the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude, which can prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split unit and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0064] It can be understood that after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment amplitude, the opening of the electronic expansion valve corresponding to the target heat exchanger is adjusted according to the current temperature of the heat exchanger and the second duration, which can better prevent the refrigerant from flowing through the target indoor unit, thereby improving the cooling effect of the multi-split system and reducing the noise of the refrigerant flow, thereby improving customer satisfaction.

[0065] It can be understood that the above-mentioned second preset time can be 10 minutes, which can be set according to actual conditions and is not specifically limited in the embodiment of the present application.

[0066] It can be understood that the above-mentioned second adjustment amplitude can be 196P, which can be set according to actual conditions, and the embodiment of the present application does not make any specific limitation on it.

[0067] In addition, if Figure 7 As shown, Figure 7It is a flow chart of a control method for an air-conditioning system provided by another embodiment of the present application; after reducing the opening of the electronic expansion valve corresponding to the target indoor unit based on the second adjustment amplitude, it may include but is not limited to step S710 and step S720.

[0068] Step S710: when the current temperature of the heat exchanger is lower than the third preset temperature, it is determined that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and a valve body leakage alarm message is issued; Step S720: When the current temperature of the heat exchanger is greater than or equal to the third preset temperature, the opening of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

[0069] It can be understood that after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude, if the current temperature of the heat exchanger is lower than the third preset temperature, it means that refrigerant is still flowing through the target indoor unit, thereby determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and then issuing a valve body leakage alarm message.

[0070] It can be understood that after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment range, if the current temperature of the heat exchanger is greater than or equal to the third preset temperature, it means that after adjusting the opening of the electronic expansion valve, no refrigerant flows through the target indoor unit. Therefore, there is no need to change the opening of the electronic expansion valve corresponding to the target indoor unit.

[0071] It can be understood that the third preset temperature mentioned above can be 10° C. and can be set according to actual conditions, and the embodiment of the present application does not limit it.

[0072] Exemplarily, after reducing the opening of the electronic expansion valve corresponding to the target indoor unit according to the second adjustment amplitude, if the middle temperature of the heat exchanger is lower than the third preset temperature, it indicates that refrigerant is still flowing through the target indoor unit, thereby determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state.

[0073] Exemplarily, after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude, if the heat exchanger outlet temperature is lower than the third preset temperature, it means that refrigerant is still flowing through the target indoor unit, thereby determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state.

[0074] Exemplarily, after reducing the opening of the electronic expansion valve corresponding to the target indoor unit according to the second adjustment amplitude, if the middle temperature of the heat exchanger and the outlet temperature of the heat exchanger are both lower than the third preset temperature, it means that refrigerant is still flowing through the target indoor unit, thereby determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state.

[0075] In addition, if Figure 8 As shown, Figure 8 It is a flowchart of a control method of an air-conditioning system provided by another embodiment of the present application; regarding the above-mentioned step S710, it may include but is not limited to step S810 and step S820.

[0076] Step S810: when the current temperature of the heat exchanger is lower than the third preset temperature, obtaining a third duration during which the current temperature of the heat exchanger is lower than the third preset temperature; Step S820: When the third duration is greater than or equal to the third preset time, it is determined that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and a valve body leakage alarm message is issued;

[0077] In one embodiment, when the current temperature of the heat exchanger is less than the third preset temperature, the third duration that the current temperature of the heat exchanger is less than the third preset temperature is obtained. When the third duration is greater than or equal to the third preset time, it indicates that refrigerant is still flowing through the target indoor unit, thereby determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and then issuing a valve body leakage alarm message.

[0078] Based on the control methods of the air-conditioning system of the above-mentioned various embodiments, overall embodiments of the control methods of the air-conditioning system of the present application are respectively proposed below.

[0079] like Fig. 9 As shown, Fig. 9 It is an overall flow chart of a control method for an air-conditioning system provided in one embodiment of the present application.

[0080] In one embodiment, in the cooling mode and when the operating frequency is greater than 0 Hz, the target indoor unit in the shutdown state is determined by the operating status of each indoor unit, and the middle temperature of the heat exchanger of the target indoor unit is obtained. If the middle temperature of the heat exchanger is less than 10°C, the first duration of the middle temperature of the heat exchanger less than 10°C is obtained. If the first duration is greater than or equal to 10 minutes, the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment amplitude 196P; if the middle temperature of the heat exchanger is greater than or equal to 10°C, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained; in addition, after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment amplitude 196P, if the middle temperature of the heat exchanger is less than 10°C, the middle temperature of the heat exchanger is less than 1 The second duration of the heat exchanger at 0°C is obtained, and if the second duration is greater than or equal to 10min, the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude 196P; if the middle temperature of the heat exchanger is greater than or equal to 10°C, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained; in addition, after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude 196P, if the middle temperature of the heat exchanger is less than 10°C, the third duration of the middle temperature of the heat exchanger less than 10°C is obtained, and if the third duration is greater than or equal to 10min, it is determined that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state; if the middle temperature of the heat exchanger is greater than or equal to 10°C, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained.

[0081] like Fig.10 As shown, Fig.10 It is an overall flow chart of a control method for an air-conditioning system provided in another embodiment of the present application.

[0082] In one embodiment, in the cooling mode and when the operating frequency is greater than 0 Hz, the target indoor unit in the shutdown state is determined by the operating status of each indoor unit, and the heat exchanger outlet temperature of the target indoor unit is obtained. If the heat exchanger outlet temperature is less than 10°C, the first duration of the heat exchanger outlet temperature less than 10°C is obtained. If the first duration is greater than or equal to 10 minutes, the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment amplitude 196P; if the heat exchanger outlet temperature is greater than or equal to 10°C, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained; in addition, after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment amplitude 196P, if the heat exchanger outlet temperature is less than 10°C, the heat exchanger outlet temperature is less than 10°C. The second duration of the heat exchanger outlet temperature is obtained at 0℃, and if the second duration is greater than or equal to 10min, the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude 196P; if the heat exchanger outlet temperature is greater than or equal to 10℃, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained; in addition, after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude 196P, if the heat exchanger outlet temperature is less than 10℃, the third duration of the heat exchanger outlet temperature less than 10℃ is obtained, and if the third duration is greater than or equal to 10min, it is determined that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state; if the heat exchanger outlet temperature is greater than or equal to 10℃, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained.

[0083] like Fig.11 As shown, Fig.11 It is an overall flow chart of a control method for an air-conditioning system provided in another embodiment of the present application.

[0084] In one embodiment, in the cooling mode and when the operating frequency is greater than the preset frequency, the target indoor unit in the shutdown state is determined by the operating status of each indoor unit, and the middle temperature of the heat exchanger and the heat exchanger outlet temperature of the target indoor unit are determined. If the middle temperature of the heat exchanger and the heat exchanger outlet temperature are both less than 10°C, the first duration for which the middle temperature of the heat exchanger and the heat exchanger outlet temperature are both less than 10°C is obtained. If the first duration is greater than or equal to 10 minutes, the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment amplitude 196P; if the middle temperature of the heat exchanger and the heat exchanger outlet temperature are both greater than or equal to 10°C, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained; in addition, after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the first adjustment amplitude 196P, if the middle temperature of the heat exchanger and the heat exchanger outlet temperature are both less than 10°C, the middle temperature of the heat exchanger and the heat exchanger outlet temperature are increased. The second duration during which the heat exchanger outlet temperature is less than 10°C is obtained, and if the second duration is greater than or equal to the first duration, the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude 196P; if the middle temperature of the heat exchanger and the heat exchanger outlet temperature are both greater than or equal to 10°C, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained; in addition, after the opening of the electronic expansion valve corresponding to the target indoor unit is reduced according to the second adjustment amplitude 196P, if the middle temperature of the heat exchanger and the heat exchanger outlet temperature are both less than 10°C, a third duration during which the middle temperature of the heat exchanger and the heat exchanger outlet temperature are both less than 10°C is obtained, and if the third duration is greater than or equal to 10 minutes, it is determined that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state; if the middle temperature of the heat exchanger and the heat exchanger outlet temperature are both greater than or equal to 10°C, the opening of the electronic expansion valve corresponding to the target indoor unit is maintained.

[0085] Based on the control methods of the air-conditioning system of the above-mentioned various embodiments, various embodiments of the controller, air-conditioning system, computer-readable storage medium and computer program product of the present application are respectively proposed below.

[0086] like Fig.12 As shown, Fig.12 700 is a schematic diagram of a controller for executing a control method for an air conditioning system provided by an embodiment of the present application. The controller 700 implemented in the present application includes: a processor 710, a memory 720, and a computer program stored in the memory 720 and executable on the processor 710, wherein: Fig.12 In the figure, a processor 710 and a memory 720 are taken as an example.

[0087] The processor 710 and the memory 720 may be connected via a bus or other means. Fig.12 The example of connecting through bus is taken in the following.

[0088] The memory 720, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 720 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 720 optionally includes a memory 720 remotely arranged relative to the processor 710, and these remote memories 720 can be connected to the controller 700 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0089] Those skilled in the art will understand that Fig.12 The device structure shown in the figure does not constitute a limitation on the controller 700, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0090] exist Fig.12 In the controller 700 shown, the processor 710 can be used to call the control program stored in the memory 720, so as to implement the control method of the air-conditioning system described above. Specifically, the non-transient software program and instructions required to implement the control method of the air-conditioning system of the above embodiment are stored in the memory 720, and when executed by the processor 710, the control method of the air-conditioning system of the above embodiment is executed.

[0091] It is worth noting that since the controller 700 of the embodiment of the present application can execute the control method of the air-conditioning system of any of the above-mentioned embodiments, the specific implementation manner and technical effects of the controller 700 of the embodiment of the present application can refer to the specific implementation manner and technical effects of the control method of the air-conditioning system of any of the above-mentioned embodiments.

[0092] In addition, an embodiment of the present application further provides an air conditioning system, which includes the controller of the above embodiment.

[0093] It is worth noting that since the air-conditioning system of the embodiment of the present application includes the controller of the above-mentioned embodiment, and the controller of the above-mentioned embodiment can execute the control method of the air-conditioning system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the air-conditioning system of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method of the air-conditioning system of any of the above-mentioned embodiments.

[0094] In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the control method of the air-conditioning system described above. Figures 2 to 11The method steps in .

[0095] It is worth noting that since the computer-readable storage medium of the embodiment of the present application can execute the control method of the air-conditioning system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the computer-readable storage medium of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method of the air-conditioning system of any of the above-mentioned embodiments.

[0096] In addition, an embodiment of the present application further provides a computer program product, including a computer program or a computer instruction, the computer program or the computer instruction is stored in a computer-readable storage medium, the processor of the computer device reads the computer program or the computer instruction from the computer-readable storage medium, and the processor executes the computer program or the computer instruction, so that the computer device executes the control method of the air-conditioning system described above. Figures 2 to 11 The method steps in .

[0097] It is worth noting that since the computer program product of the embodiment of the present application can execute the control method of the air-conditioning system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the computer program product of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method of the air-conditioning system of any of the above-mentioned embodiments.

[0098] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0099] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0100] In several embodiments provided in the present application, it should be understood that the disclosed systems, apparatuses and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of apparatuses or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0101] It should also be understood that the various implementations provided in the embodiments of the present application can be combined arbitrarily to achieve different technical effects.

[0102] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions under the shared conditions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A control method for an air conditioning system, characterized in that: The air conditioning system comprises an outdoor unit, a plurality of indoor units and a plurality of electronic expansion valves, wherein the plurality of indoor units are connected to the outdoor unit via the plurality of electronic expansion valves, and the plurality of indoor units and the plurality of electronic expansion valves are connected one-to-one, and the method comprises: In cooling mode, obtaining the operating frequency of the outdoor unit and the operating status of each of the indoor units; When the operating frequency is greater than a preset frequency, a target indoor unit in a shutdown state is determined among the plurality of indoor units according to the operating states of the indoor units, and a current temperature of a heat exchanger of the target indoor unit is obtained; The opening degree of the electronic expansion valve corresponding to the target indoor unit is adjusted according to the current temperature of the heat exchanger.

2. The control method of an air conditioning system according to claim 1, characterized in that: The adjusting the opening of the electronic expansion valve corresponding to the target indoor unit according to the current temperature of the heat exchanger includes one of the following: When the current temperature of the heat exchanger is lower than the first preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit; When the current temperature of the heat exchanger is greater than or equal to the first preset temperature, the opening degree of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

3. The control method of an air conditioning system according to claim 2, characterized in that: When the current temperature of the heat exchanger is lower than the first preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit includes: When the current temperature of the heat exchanger is lower than a first preset temperature, obtaining a first duration during which the current temperature of the heat exchanger is lower than the first preset temperature; When the first duration is greater than or equal to a first preset time, the opening degree of the electronic expansion valve corresponding to the target indoor unit is reduced based on a first adjustment range.

4. The control method of an air conditioning system according to claim 3, characterized in that: After reducing the opening degree of the electronic expansion valve corresponding to the target indoor unit based on the first adjustment amplitude, the method further includes one of the following: When the current temperature of the heat exchanger is lower than a second preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit; When the current temperature of the heat exchanger is greater than or equal to the second preset temperature, the opening degree of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

5. The control method of an air conditioning system according to claim 4, characterized in that: When the current temperature of the heat exchanger is lower than the second preset temperature, reducing the opening of the electronic expansion valve corresponding to the target indoor unit includes: When the current temperature of the heat exchanger is lower than a second preset temperature, obtaining a second duration during which the current temperature of the heat exchanger is lower than the second preset temperature; When the second duration is greater than or equal to a second preset time, the opening degree of the electronic expansion valve corresponding to the target indoor unit is reduced based on a second adjustment range.

6. The control method of an air conditioning system according to claim 5, characterized in that: After reducing the opening degree of the electronic expansion valve corresponding to the target indoor unit based on the second adjustment amplitude, the method further includes one of the following: When the current temperature of the heat exchanger is lower than a third preset temperature, determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and issuing a valve body leakage alarm message; When the current temperature of the heat exchanger is greater than or equal to the third preset temperature, the opening degree of the electronic expansion valve corresponding to the target indoor unit is kept unchanged.

7. The control method of an air conditioning system according to claim 6, characterized in that: When the current temperature of the heat exchanger is lower than the third preset temperature, determining that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and issuing valve body leakage alarm information, includes: When the current temperature of the heat exchanger is lower than a third preset temperature, obtaining a third duration during which the current temperature of the heat exchanger is lower than the third preset temperature; When the third duration is greater than or equal to a third preset time, it is determined that the electronic expansion valve corresponding to the target indoor unit is in a valve body leakage state, and the valve body leakage alarm information is issued.

8. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes a control method for an air-conditioning system as described in any one of claims 1 to 7 when executing the computer program.

9. An air conditioning system, characterized in that: Comprising a controller as claimed in claim 8.

10. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute the control method of an air-conditioning system as described in any one of claims 1 to 7.

11. A computer program product comprising a computer program or computer instructions, characterized in that The computer program or the computer instruction is stored in a computer-readable storage medium, the processor of a computer device reads the computer program or the computer instruction from the computer-readable storage medium, and the processor executes the computer program or the computer instruction, so that the computer device executes a control method for an air-conditioning system as described in any one of claims 1 to 7.

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