Air conditioning system, control method and storage medium

Abstract

The invention discloses an air conditioning system, a control method and a storage medium, and relates to the technical field of air conditioning equipment. The system comprises a refrigerant circulation loop, wherein an outdoor heat exchanger, an indoor heat exchanger, a plurality of refrigerant circulation branches, a plurality of bypasses, a first temperature detection device, a second temperature detection device and a control device are arranged in the loop. Each refrigerant circulation branch comprises a first refrigerant branch and a second refrigerant branch which are respectively connected with the corresponding ends of the indoor heat exchanger and the outdoor heat exchanger and are respectively provided with a first valve and a second valve; the first refrigerant bypass communicates with a first refrigerant branch between the first valve and the outdoor heat exchanger and a second refrigerant branch between the second valve of the adjacent refrigerant circulation branch and the outdoor heat exchanger, and the first refrigerant bypass is provided with a third valve. The first and second temperature detection devices respectively detect first and second temperatures of the corresponding ends of the outdoor heat exchanger, and the control device is used for adjusting the conduction state of each valve according to the first and second temperatures. The overall heat exchange efficiency can be improved.

Description

Technical Field

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

[0002] In existing air conditioning systems, the number of flow paths and flow lengths in outdoor heat exchangers are typically designed based on clean operating conditions and remain largely unchanged after the equipment is put into operation. However, the actual operating environment is complex and changing, making it often difficult to maintain the clean conditions initially designed. Over time, dust, impurities, and other contaminants inevitably accumulate on the surface of the outdoor heat exchanger, reducing the heat exchange efficiency between some flow paths and the outdoor environment, resulting in a decrease in overall heat exchange efficiency. Therefore, improving overall heat exchange efficiency is a pressing technical issue. 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 an air conditioning system, a control method and a storage medium that can improve the overall heat exchange efficiency.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application provides an air conditioning system, comprising a refrigerant circulation circuit, the refrigerant circulation circuit comprising an outdoor heat exchanger and an indoor heat exchanger, the refrigerant circulation circuit further comprising: A plurality of refrigerant circulation branches, the refrigerant circulation branches including a first refrigerant branch and a second refrigerant branch, the first refrigerant branch having two ends respectively connected to a first end of the indoor heat exchanger and a first end of the outdoor heat exchanger, the first refrigerant branch being provided with a first valve; the second refrigerant branch having two ends respectively connected to a second end of the indoor heat exchanger and a second end of the outdoor heat exchanger, the second refrigerant branch being provided with a second valve; a first refrigerant bypass, wherein both ends of the first refrigerant bypass are respectively connected to the first refrigerant branch between the first valve and the outdoor heat exchanger, and the second refrigerant branch between the second valve of the adjacent refrigerant circulation branch and the outdoor heat exchanger, and the first refrigerant bypass is provided with a third valve; a plurality of first temperature detection devices, wherein the first temperature detection devices are used to detect a first temperature of a first end of the outdoor heat exchanger; a plurality of second temperature detection devices, the second temperature detection devices being used to detect a second temperature at a second end of the outdoor heat exchanger; A control device is used to control the conduction state of the first valve, the second valve and the third valve corresponding to the refrigerant circulation branch according to the first temperature and the second temperature.

[0005] According to the first aspect of the embodiment of the present application, at least the following beneficial effects are achieved: when the outdoor heat exchanger is operating in a harsh outdoor environment, impurities such as dust and small plastic bags may adhere to the surface of the outdoor heat exchanger, hindering the copper tubes and fins of the outdoor heat exchanger from exchanging heat with the surrounding air, resulting in abnormalities in the first temperature detected by the first temperature detection device and the second temperature detected by the second temperature detection device in a certain refrigerant circulation branch. The control device controls the conduction state of the first valve, the second valve, and the third valve of the corresponding refrigerant circulation branch according to the first temperature and the second temperature, so that the refrigerant in the refrigerant circulation branch with abnormal heat exchange can be merged into the adjacent refrigerant circulation branch, making the heat exchange of each refrigerant circulation branch more uniform, thereby improving the overall heat exchange efficiency of the outdoor heat exchanger. Compared with the prior art, the embodiment of the present application can improve the overall heat exchange efficiency of the outdoor heat exchanger. Therefore, the embodiment of the present application solves the technical problem of how to improve the overall heat exchange efficiency.

[0006] In a second aspect, the present application provides a control method for an air-conditioning system, which is applied to the air-conditioning system described in the embodiment of the first aspect of the present application; The control method includes: acquiring a first temperature from the first temperature detection device and a second temperature from the second temperature detection device; The conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch are controlled according to the first temperature and the second temperature.

[0007] According to the second aspect embodiment of the present application, there are at least the following beneficial effects: by obtaining the first temperature from the first temperature detection device and the second temperature from the second temperature detection device in real time, the conduction state of the first valve, the second valve and the second valve in the refrigerant circulation branch are intelligently adjusted to deal with abnormal heat exchange of the refrigerant circulation branch. When the heat exchange of a certain refrigerant circulation branch is abnormal, the conduction state of the first valve, the second valve and the third valve is controlled by the control device, and the refrigerant of the refrigerant circulation branch with abnormal heat exchange can be merged into the adjacent refrigerant circulation branch, so that the heat exchange of each refrigerant circulation branch is more uniform, thereby improving the overall heat exchange efficiency of the outdoor heat exchanger. Compared with the prior art, the embodiment of the present application can improve the overall heat exchange efficiency of the outdoor heat exchanger. Therefore, the embodiment of the present application solves the technical problem of how to improve the overall heat exchange efficiency.

[0008] According to some embodiments of the second aspect of the present application, controlling the conductance states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the first temperature and the second temperature includes: Obtaining a temperature difference according to the first temperature and the second temperature; Obtaining a temperature difference average according to the temperature difference of each refrigerant circulation branch; According to the temperature difference and the average temperature difference of each refrigerant circulation branch, the conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch are controlled.

[0009] According to some embodiments of the second aspect of the present application, controlling the conductance states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the temperature difference and the average temperature difference of each refrigerant circulation branch includes: Get the working status of the air conditioning system; The conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch are controlled according to the working state, the temperature difference of each refrigerant circulation branch, and the average temperature difference.

[0010] According to some embodiments of the second aspect of the present application, controlling the conductance states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the operating state, the temperature difference of each refrigerant circulation branch, and the average temperature difference includes: When the working state is cooling, a plurality of first difference values are obtained according to the temperature difference value and the average temperature difference value of each refrigerant circulation branch; Obtaining a preset first threshold; According to several first differences and the preset first threshold value, the first valve of the corresponding refrigerant circulation branch is controlled to be closed, the third valve connected to the corresponding first refrigerant branch is controlled to be opened, and the second valve of the adjacent refrigerant circulation branch connected to the corresponding third valve is controlled to be closed.

[0011] According to some embodiments of the second aspect of the present application, controlling the conductance states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the operating state, the temperature difference of each refrigerant circulation branch, and the average temperature difference further includes: When the first refrigerant branch of the corresponding refrigerant circulation branch does not have the first refrigerant bypass, the second valve of the corresponding refrigerant circulation branch is controlled to be closed, and the third valve connected to the second refrigerant branch is controlled to be opened.

[0012] According to some embodiments of the second aspect of the present application, controlling the conductance states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the operating state, the temperature difference of each refrigerant circulation branch, and the average temperature difference includes: When the working state is heating, a plurality of second difference values are obtained according to the temperature difference value of each refrigerant circulation branch and the average temperature difference value; Obtaining a preset second threshold; According to several second differences and the preset second threshold value, the second valve of the corresponding refrigerant circulation branch is controlled to be closed, the third valve connected to the corresponding second refrigerant branch is controlled to be opened, and the first valve of the adjacent refrigerant circulation branch connected to the corresponding third valve is controlled to be closed.

[0013] According to some embodiments of the second aspect of the present application, controlling the conductance states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the operating state, the temperature difference of each refrigerant circulation branch, and the average temperature difference further includes: When the second refrigerant branch of the corresponding refrigerant circulation branch does not have the first refrigerant bypass, the first valve of the corresponding refrigerant circulation branch is controlled to be closed, and the third valve connected to the first refrigerant branch is controlled to be opened.

[0014] In a third aspect, an embodiment of the present application further provides an air-conditioning system, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the control method as described in any one of the second aspects is implemented.

[0015] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method as described in any one of the second aspects.

[0016] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a refrigerant circulation in a cooling working state of an embodiment of the air-conditioning system of the present application; Figure 2 This is a schematic diagram of a refrigerant circulation in a heating working state of an embodiment of the air-conditioning system of the present application; Figure 3 This is a flow chart of an embodiment of a method for controlling an air-conditioning system of the present application; Figure 4 for Figure 3 Flowchart of step S102 in FIG. Figure 5 for Figure 4 Flowchart of step S203 in FIG. Figure 6 for Figure 5 Flowchart of step S302 in the cooling working state; Figure 7 for Figure 5 Flowchart of step S302 in the heating working state; Figure 8 This is a logic diagram of the control method of the air-conditioning system of the present application in the cooling working state; Figure 9 This is a logic diagram of the control method of the air-conditioning system of the present application under heating working conditions; Figure 10 This is a structural diagram of an embodiment of the air-conditioning system of the present application.

[0018] Reference numerals: Outdoor heat exchanger 100, indoor heat exchanger 110, Refrigerant circulation branch 200, The first refrigerant branch 210, the first valve 211, Second refrigerant branch 220, second valve 221, The first refrigerant bypass 300, the third valve 310, The first temperature detection device 400, The second temperature detection device 500, Memory 600, Processor 700. DETAILED DESCRIPTION

[0019] The following describes in detail embodiments of the present application. 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 are not to be construed as limiting the present application. In the description of this application, it should be understood that descriptions involving orientations, 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. They are only for the convenience of describing this 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. Therefore, they cannot be understood as limitations on this application. In the description of this application, terms such as "greater than," "less than," and "exceed" are understood to exclude the number indicated, while terms such as "above," "below," and "within" are understood to include the number indicated. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the indicated technical features. In the description of this application, unless otherwise explicitly defined, terms such as "dispose," "install," and "connect" should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to mechanical connection or electrical connection; they can refer to direct connection or indirect connection through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0020] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0021] Reference Figure 1 、 2 As shown, the air conditioning system includes a refrigerant circulation circuit, the refrigerant circulation circuit includes an outdoor heat exchanger and an indoor heat exchanger, and the refrigerant circulation circuit also includes: a plurality of refrigerant circulation branches, the refrigerant circulation branch includes a first refrigerant branch and a second refrigerant branch, the two ends of the first refrigerant branch are respectively connected to the first end of the indoor heat exchanger and the first end of the outdoor heat exchanger, and the first refrigerant branch is provided with a first valve; the two ends of the second refrigerant branch are respectively connected to the second end of the indoor heat exchanger and the second end of the outdoor heat exchanger, and the second refrigerant branch is provided with a second valve; the first refrigerant bypass, the two ends of the first refrigerant bypass are respectively connected to the first The first refrigerant branch between the valve and the outdoor heat exchanger, the second valve of the adjacent refrigerant circulation branch and the second refrigerant branch between the outdoor heat exchanger are connected, and the first refrigerant bypass is provided with a third valve; a plurality of first temperature detection devices, the first temperature detection device is used to detect the first temperature of the first end of the outdoor heat exchanger; a plurality of second temperature detection devices, the second temperature detection device is used to detect the second temperature of the second end of the outdoor heat exchanger; a control device, the control device is used to control the conduction state of the first valve, the second valve and the third valve of the corresponding refrigerant circulation branch according to the first temperature and the second temperature.

[0022] In the above embodiment, when the outdoor heat exchanger is operating in a harsh outdoor environment, impurities such as dust and small plastic bags may adhere to the surface of the outdoor heat exchanger, hindering the copper tubes and fins of the outdoor heat exchanger from exchanging heat with the surrounding air, resulting in abnormalities in the first temperature detected by the first temperature detection device and the second temperature detected by the second temperature detection device in a certain refrigerant circulation branch. The control device controls the conduction state of the first valve, the second valve, and the third valve of the corresponding refrigerant circulation branch according to the first temperature and the second temperature, so that the refrigerant in the refrigerant circulation branch with abnormal heat exchange can be merged into the adjacent refrigerant circulation branch, making the heat exchange of each refrigerant circulation branch more uniform, thereby improving the overall heat exchange efficiency of the outdoor heat exchanger. Compared with the prior art, the embodiment of the present application can improve the overall heat exchange efficiency of the outdoor heat exchanger.

[0023] In some embodiments, the first valve, the second valve, and the third valve may be solenoid valves, and the first temperature detection device and the second temperature detection device may be temperature sensing packages. Two adjacent refrigerant circulation branches are connected only through one first refrigerant bypass.

[0024] The air-conditioning system of the embodiment of the present application also includes a compressor, an outdoor heat exchanger fan, an electronic expansion valve, a four-way valve, an indoor fan, a gas-liquid separator, an outdoor ambient temperature sensor, an exhaust pressure sensor, and an intake pressure sensor, all of which are well-known technologies in the field. For relevant technical details, please refer to existing literature.

[0025] refer to Figure 3 As shown, Figure 3 The method may include but is not limited to steps S101 to S102: Step S101, obtaining a first temperature from a first temperature detection device and a second temperature from a second temperature detection device; In step S102 , the conduction states of the first valve, the second valve, and the third valve of the corresponding refrigerant circulation branch are controlled according to the first temperature and the second temperature.

[0026] In the steps S101 to S102 shown in the embodiment of the present application, by obtaining the first temperature from the first temperature detection device and the second temperature from the second temperature detection device in real time, the conduction state of the first valve, the second valve and the second valve in the refrigerant circulation branch are intelligently adjusted to cope with the abnormal heat exchange of the refrigerant circulation branch. When the heat exchange of a refrigerant circulation branch is abnormal, the conduction state of the first valve, the second valve and the third valve is controlled by the control device, and the refrigerant of the refrigerant circulation branch with the abnormal heat exchange can be merged into the adjacent refrigerant circulation branch, so that the heat exchange of each refrigerant circulation branch is more uniform, thereby improving the overall heat exchange efficiency of the outdoor heat exchanger. Compared with the prior art, the embodiment of the present application can improve the overall heat exchange efficiency of the outdoor heat exchanger.

[0027] It is understandable that, referring to Figure 4 As shown, step S102 may include but is not limited to steps S201 to S203: Step S201, obtaining a temperature difference according to the first temperature and the second temperature; Step S202, obtaining a temperature difference average based on the temperature difference of each refrigerant circulation branch; Step S203 , controlling the conduction states of the first valve, the second valve, and the third valve of the corresponding refrigerant circulation branch according to the temperature difference and the average temperature difference of each refrigerant circulation branch.

[0028] In steps S201 to S203 shown in the embodiment of the present application, the temperature difference is calculated based on the first temperature and the second temperature, and the average temperature difference of each refrigerant circulation branch is further obtained, which provides an accurate basis for subsequent flow regulation. By comparing the temperature difference of each refrigerant circulation branch with the average temperature difference, the abnormal refrigerant circulation branch is identified, and the conduction state of the first valve, the second valve, and the third valve can be precisely adjusted so that the refrigerant in the abnormal refrigerant circulation branch can be merged with the adjacent refrigerant circulation branch, thereby uniformly exchanging heat among the refrigerant circulation branches in the indoor heat exchanger to improve the overall heat exchange efficiency.

[0029] It is understandable that, referring to Figure 5 As shown, step S203 may include but is not limited to steps S301 to S302: Step S301, obtaining the working status of the air conditioning system; Step S302 , controlling the conduction states of the first valve, the second valve, and the third valve of the corresponding refrigerant circulation branch according to the working state, the temperature difference value, and the average temperature difference value of each refrigerant circulation branch.

[0030] Steps S301 to S302, as shown in the embodiment of the present application, first obtain the current operating status of the air conditioner, which provides basic information for subsequent adjustments. Then, based on the operating status, the temperature difference between each refrigerant circulation branch, and the average temperature difference, the control device can intelligently control the conduction state of the first valve, the second valve, and the third valve. The embodiment of the present application can precisely adjust the distribution of refrigerant in each refrigerant circulation branch based on the operating status of the air conditioner, making the heat exchange between each refrigerant circulation branch more uniform, thereby improving the overall heat exchange efficiency.

[0031] It is understandable that, referring to Figure 6 As shown, step S302 may include but is not limited to steps S401 to S403: Step S401, when the working state is cooling, obtain a plurality of first difference values according to the temperature difference value and the temperature difference average value of each refrigerant circulation branch; Step S402, obtaining a preset first threshold; In step S403, based on a plurality of first differences and a preset first threshold value, the first valve of the corresponding refrigerant circulation branch is controlled to be closed, the third valve connected to the corresponding first refrigerant branch is controlled to be opened, and the second valve of the adjacent refrigerant circulation branch connected to the corresponding third valve is controlled to be closed.

[0032] In the steps S401 to S403 shown in the embodiment of the present application, in step S401, when the air-conditioning system is in the cooling working state, the system calculates a number of first differences based on the temperature difference and the temperature difference mean of each refrigerant circulation branch. These first differences provide a basis for subsequent decision-making. In step S402, the system obtains a preset first threshold value for comparison with the calculated first difference value. Finally, in step S403, based on the comparison results of the first differences and the preset first threshold value, the system intelligently controls the first valve of the corresponding refrigerant circulation branch to close, controls the third valve connected to the corresponding first refrigerant branch to open, and controls the second valve of the adjacent refrigerant circulation branch connected to the corresponding third valve to close. This adjustment can effectively guide the refrigerant in the abnormal refrigerant circulation branch to merge with the adjacent refrigerant circulation branch, so that the heat exchange of each refrigerant circulation branch is more uniform, thereby improving the overall heat exchange efficiency and improving the cooling effect.

[0033] It is understandable that, referring to Figure 6 As shown, step S302 also includes but is not limited to step S404: In step S404 , when the first refrigerant branch of the corresponding refrigerant circulation branch does not have a first refrigerant bypass, the second valve of the corresponding refrigerant circulation branch is controlled to be closed, and the third valve connected to the second refrigerant branch is controlled to be opened.

[0034] In step S404 of the embodiment of the present application, the system controls the second valve in the refrigerant circulation branch of the corresponding first refrigerant branch without the first refrigerant bypass to close, and simultaneously controls the third valve connected to the second refrigerant branch to open. This regulation can be used to deal with the situation where the first refrigerant branch of the refrigerant circulation branch with heat exchange anomaly does not have the first refrigerant bypass, while the refrigerant can still be merged with the adjacent refrigerant circulation branch connected to the second refrigerant branch of the refrigerant circulation branch.

[0035] For example, Figure 8 This is a logic diagram of the control method of the air conditioning system of this application in the cooling working state. Figure 8 As shown, the embodiment of the present application does not limit the number of refrigerant circulation branches, and takes n refrigerant circulation branches as an example. The first temperature detection device and the second temperature detection device will detect the first temperature and the second temperature in each refrigerant circulation branch. 进管n Indicates the first temperature, T 出管nThe control device obtains the working state of the system cooling as cooling, and after obtaining the first temperature and the second temperature, performs subtraction processing on the first temperature and the second temperature to obtain the temperature difference of each refrigerant circulation branch. 冷差m Indicates the temperature difference. The larger the temperature difference, the better the heat transfer effect, and the smaller the temperature difference, the worse the heat transfer effect. Then all the temperature differences will be processed to obtain the average temperature difference, T 冷ave Represents the average temperature difference in the cooling state. After processing all data, the control system will control all first valves and all second valves to open, and all third valves to close. The inlet solenoid valve represents the first valve, the outlet solenoid valve represents the second valve, and the connecting solenoid valve represents the third valve. The control device then subtracts the average temperature difference from the temperature difference corresponding to each refrigerant circulation branch to obtain a first difference. The control device compares the first difference with a preset first threshold. The first threshold can range from 5 to 8°C. If the first difference is not greater than the first threshold, the first and second valves will be controlled to remain open, and the third valve will be closed. If the first difference is greater than the first threshold, the control device will proceed to the next process. m represents the number corresponding to the refrigerant circulation branch experiencing the heat exchange anomaly. When the number m corresponding to the refrigerant circulation branch experiencing the heat exchange anomaly is greater than or equal to 2. The control device controls the first valve labeled n to close, the second valve labeled n-1 to open, and the third valve labeled n-1 to open, wherein the first valve labeled n is located in the refrigerant circulation branch labeled m. The above adjustment allows the refrigerant in the refrigerant circulation branch labeled m to be merged into the refrigerant circulation branch labeled m-1. If the label m corresponding to the circulation branch with heat exchange anomaly is less than 2, and because m can only be an integer, the label m corresponding to the refrigerant circulation branch with the anomaly is 1, the control device controls the second valve labeled 1 to close and controls the third valve labeled 1 to open. Because the refrigerant circulation loop labeled 1 is adjacent to the refrigerant circulation loop labeled 2, the refrigerant circulation branch labeled m-1 is merged with the refrigerant circulation branch labeled 2. The control device then determines the power-on / off status of the air conditioning system. If the air conditioning system is not turned off, the previous process is maintained. If the air conditioning system is turned off and then turned on again, the control device controls all first and second valves to open and all third valves to close. Through the above processing, the embodiment of the present application can reasonably distribute the refrigerant flow rate of each refrigerant circulation branch, improve the overall heat exchange efficiency and thus enhance the cooling effect.

[0036] It is understandable that, referring to Figure 7 As shown, step S302 may include but is not limited to steps S501 to S503: Step S501, when the working state is heating, obtain a plurality of second difference values according to the temperature difference value and the temperature difference average value of each refrigerant circulation branch; Step S502, obtaining a preset second threshold; In step S503, based on a plurality of second differences and a preset second threshold value, the second valve of the corresponding refrigerant circulation branch is controlled to be closed, the third valve connected to the corresponding second refrigerant branch is controlled to be opened, and the first valve of the adjacent refrigerant circulation branch connected to the corresponding third valve is controlled to be closed.

[0037] In the steps S501 to S503 shown in the embodiment of the present application, in step S501, when the air-conditioning system is in the heating working state, the system calculates a number of second differences based on the temperature difference and the temperature difference mean of each refrigerant circulation branch. These second differences provide basic data for subsequent flow control. In step S502, the system obtains a preset second threshold value for comparison with the second difference value to determine whether the refrigerant flow needs to be adjusted. Finally, in step S503, based on the number of second differences and the preset second threshold value, the second valve of the corresponding refrigerant circulation branch is controlled to be closed, the third valve connected to the corresponding second refrigerant branch is controlled to be opened, and the first valve of the adjacent refrigerant circulation branch connected to the corresponding third valve is controlled to be closed. This adjustment can effectively guide the refrigerant in the abnormal refrigerant circulation branch to merge with the adjacent refrigerant circulation branch, so that the heat exchange of each refrigerant circulation branch is more uniform, improving the overall heat exchange efficiency and improving the heating effect.

[0038] It is understandable that, referring to Figure 7 As shown, step S302 also includes but is not limited to step S504: In step S504 , when the second refrigerant branch of the corresponding refrigerant circulation branch does not have the first refrigerant bypassing, the first valve of the corresponding refrigerant circulation branch is controlled to be closed, and the third valve connected to the first refrigerant branch is controlled to be opened.

[0039] In step S504, as shown in the embodiment of the present application, the system controls the first valve in the refrigerant circulation branch where the corresponding second refrigerant branch does not bypass the first refrigerant to close, and simultaneously controls the third valve connected to the first refrigerant branch to open. This regulation can be used to deal with the situation where the second refrigerant branch of the refrigerant circulation branch with heat exchange anomaly does not bypass the first refrigerant, while the refrigerant can still be merged with the adjacent refrigerant circulation branch connected to the first refrigerant branch of the refrigerant circulation branch.

[0040] For example, Figure 9 This is a logic diagram of the control method of the air conditioning system of this application under heating working conditions. Figure 9 As shown, the embodiment of the present application does not limit the number of refrigerant circulation branches, and takes n refrigerant circulation branches as an example. The first temperature detection device and the second temperature detection device will detect the first temperature and the second temperature in each refrigerant circulation branch. 进管nIndicates the first temperature, T 出管n Represents the second temperature. After receiving the first temperature and the second temperature, the control device performs a subtraction process on the first temperature and the second temperature to obtain the temperature difference of each refrigerant circulation branch. T 热差m Indicates the temperature difference. The larger the temperature difference, the better the heat transfer effect, and the smaller the temperature difference, the worse the heat transfer effect. Then all the temperature differences will be processed to obtain the average temperature difference, T 热ave Represents the average temperature difference in heating mode. After processing all data, the control system controls all first and second valves to open and all third valves to close. The inlet solenoid valve represents the first valve, the outlet solenoid valve represents the second valve, and the connecting solenoid valve represents the third valve. The control device then subtracts the average temperature difference from the temperature difference corresponding to each refrigerant circulation branch to obtain a second difference. The control device compares the second difference with a preset second threshold value, which can range from 2°C to 8°C. If the second difference is not greater than the second threshold value, the first and second valves are maintained open, and the third valve is closed. If the second difference is greater than the second threshold value, the control device proceeds to the next step. m represents the number of the refrigerant circulation branch experiencing heat exchange anomalies. When the outdoor temperature is below 0°C, ice may form on the surface of the outdoor heat exchanger, resulting in poor heat exchange efficiency in some refrigerant circulation branches. When the number m corresponding to the refrigerant circulation branch experiencing heat exchange anomalies is less than or equal to n-1, the control device will control the second valve labeled n to close, the first valve labeled n+1 to close, and the third valve labeled n to open, wherein the second valve labeled n is located in the refrigerant circulation branch labeled m. The above adjustment allows the refrigerant in the refrigerant circulation branch labeled m to be merged into the refrigerant circulation branch labeled m+1. If the number m corresponding to the refrigerant circulation branch experiencing an abnormality is greater than n-1, the control device will control the first valve labeled n to close and the third valve labeled n-1 to open. Because the refrigerant circulation branch labeled m is adjacent to the refrigerant circulation branch labeled n-1, the refrigerant circulation branch labeled m is merged with the refrigerant circulation branch labeled n-1. The control device then determines the power-on / off status of the air conditioning system. If the air conditioning system is not turned off, the previous process is maintained. If the air conditioning system is turned off and then turned on again, the control system controls all first and second valves to open and all third valves to close. Through the above processing, the embodiment of the present application can reasonably distribute the refrigerant flow rate of each refrigerant circulation branch, improve the overall heat exchange efficiency and thus enhance the heating effect.

[0041] In some embodiments, the air-conditioning system provided by the embodiment of the first aspect of the present application heats at an indoor ambient temperature of 20°C and an outdoor ambient temperature of 7°C. The outdoor heat exchanger is provided with 5 refrigerant circulation branches, of which the third refrigerant circulation branch is partially blocked by a floating plastic bag. The first temperature detection device detects that the first temperatures corresponding to each refrigerant circulation branch are 4°C, 4°C, 0°C, 4°C and 4°C respectively, and the second temperature detection device detects that the second temperatures corresponding to each refrigerant circulation branch are 2°C, 2°C, 2°C, 2°C and 2°C respectively. The control system processes all the first temperatures and all the second temperatures to obtain the temperature differences corresponding to each refrigerant circulation branch, which are 2°C, 2°C, -2°C, 2°C and 2°C respectively, and the temperature difference average is 1.6°C. Among them, the temperature difference in the third refrigerant circulation branch and the temperature difference average are processed to obtain the second difference, the second difference is 3.6°C, the preset second threshold is 2°C, and the second difference is greater than the second threshold. The control device closes the second valve on the third refrigerant circulation branch, opens the third valve connecting the third and fourth refrigerant circulation branches, and closes the first valve on the fourth refrigerant circulation branch. After adjustment, the third and fourth refrigerant circulation branches are merged, resulting in the adjusted first temperatures of all refrigerant circulation branches being 3.8°C, 4.1°C, 3.8°C, and 3.8°C, respectively. The adjusted second temperatures of all refrigerant circulation branches are 2.2°C, 2.2°C, 2.2°C, and 2.2°C, respectively. This re-equilibrium of each refrigerant circulation branch improves overall heat exchange efficiency and thus the heating effect.

[0042] Thirdly, refer to Figure 10 As shown, an embodiment of the present application also provides an air-conditioning system, including: a memory 600, a processor 700, and a computer program stored on the memory 600 and executable on the processor 700. The processor 700 processes and executes the control method of the air-conditioning system provided in the embodiment of the second aspect of the present application, which can improve the heat exchange efficiency.

[0043] Fourthly, refer to Figure 10 As shown, a computer-readable storage medium is provided, which stores computer-executable instructions. The computer-executable instructions are executed by one or more control processors 700, enabling the one or more processors 700 to execute the control method of the air-conditioning system provided in the second aspect embodiment of the present application, thereby improving the heat exchange efficiency.

[0044] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, or appropriate combinations thereof. Some or all of the 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 computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is well known to those skilled in the art, the term computer storage media 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 includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies 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. It should be noted that the embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the embodiments of the present application are not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the embodiments of the present application. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specifically", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An air conditioning system comprising a refrigerant circulation circuit, wherein the refrigerant circulation circuit comprises an outdoor heat exchanger and an indoor heat exchanger, wherein: The refrigerant circulation loop further includes: A plurality of refrigerant circulation branches, the refrigerant circulation branches including a first refrigerant branch and a second refrigerant branch, the first refrigerant branch having two ends respectively connected to a first end of the indoor heat exchanger and a first end of the outdoor heat exchanger, the first refrigerant branch being provided with a first valve; the second refrigerant branch having two ends respectively connected to a second end of the indoor heat exchanger and a second end of the outdoor heat exchanger, the second refrigerant branch being provided with a second valve; a first refrigerant bypass, wherein both ends of the first refrigerant bypass are respectively connected to the first refrigerant branch between the first valve and the outdoor heat exchanger, and the second refrigerant branch between the second valve of the adjacent refrigerant circulation branch and the outdoor heat exchanger, and the first refrigerant bypass is provided with a third valve; a plurality of first temperature detection devices, wherein the first temperature detection devices are used to detect a first temperature of a first end of the outdoor heat exchanger; a plurality of second temperature detection devices, the second temperature detection devices being used to detect a second temperature at a second end of the outdoor heat exchanger; A control device is used to control the conduction state of the first valve, the second valve and the third valve corresponding to the refrigerant circulation branch according to the first temperature and the second temperature.

2. A method for controlling an air conditioning system, characterized in that: Applicable to the air conditioning system as claimed in claim 1; The control method includes: acquiring a first temperature from the first temperature detection device and a second temperature from the second temperature detection device; The conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch are controlled according to the first temperature and the second temperature.

3. The control method according to claim 2, characterized in that: The controlling the conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the first temperature and the second temperature includes: Obtaining a temperature difference according to the first temperature and the second temperature; Obtaining a temperature difference average according to the temperature difference of each refrigerant circulation branch; According to the temperature difference and the average temperature difference of each refrigerant circulation branch, the conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch are controlled.

4. The control method according to claim 3, characterized in that: The controlling the conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the temperature difference and the average temperature difference of each refrigerant circulation branch comprises: Get the working status of the air conditioning system; The conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch are controlled according to the working state, the temperature difference of each refrigerant circulation branch, and the average temperature difference.

5. The control method according to claim 4, characterized in that: The controlling the conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the working state, the temperature difference of each refrigerant circulation branch, and the average temperature difference includes: When the working state is cooling, a plurality of first difference values are obtained according to the temperature difference value and the average temperature difference value of each refrigerant circulation branch; Obtaining a preset first threshold; According to several first differences and the preset first threshold value, the first valve of the corresponding refrigerant circulation branch is controlled to be closed, the third valve connected to the corresponding first refrigerant branch is controlled to be opened, and the second valve of the adjacent refrigerant circulation branch connected to the corresponding third valve is controlled to be closed.

6. The control method according to claim 5, characterized in that: The method of controlling the conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the working state, the temperature difference of each refrigerant circulation branch, and the average temperature difference further includes: When the first refrigerant branch of the corresponding refrigerant circulation branch does not have the first refrigerant bypass, the second valve of the corresponding refrigerant circulation branch is controlled to be closed, and the third valve connected to the second refrigerant branch is controlled to be opened.

7. The control method according to claim 4, characterized in that: The controlling the conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the working state, the temperature difference of each refrigerant circulation branch, and the average temperature difference includes: When the working state is heating, a plurality of second difference values are obtained according to the temperature difference value of each refrigerant circulation branch and the average temperature difference value; Obtaining a preset second threshold; According to several second differences and the preset second threshold value, the second valve of the corresponding refrigerant circulation branch is controlled to be closed, the third valve connected to the corresponding second refrigerant branch is controlled to be opened, and the first valve of the adjacent refrigerant circulation branch connected to the corresponding third valve is controlled to be closed.

8. The control method according to claim 7, characterized in that: The method further includes controlling the conduction states of the first valve, the second valve, and the third valve corresponding to the refrigerant circulation branch according to the working state, the temperature difference of each refrigerant circulation branch, and the average temperature difference, and further includes: When the second refrigerant branch of the corresponding refrigerant circulation branch does not have the first refrigerant bypass, the first valve of the corresponding refrigerant circulation branch is controlled to be closed, and the third valve connected to the first refrigerant branch is controlled to be opened.

9. An air conditioning system comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method according to any one of claims 2 to 8 when executing the computer program.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method according to any one of claims 2 to 8.

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