Air conditioning unit, control method thereof, computer device and readable storage medium

Abstract

The application provides an air conditioning unit, a control method thereof, a computer device and a readable storage medium. The control method comprises the following steps: in a heating mode, determining whether an indoor unit receives a shutdown signal; if yes, the indoor unit that is shut down enters a shutdown indoor unit opening degree processing step; the shutdown indoor unit opening degree processing step comprises the following steps: calculating a first opening time length of a corresponding throttle valve and a first closing time length of the corresponding throttle valve according to the capacity of the indoor unit that is shut down; the indoor unit that is shut down is operated in a cycle period of running for the first opening time length and then being closed for the first closing time length, and the opening degree of the throttle valve of the indoor unit that is shut down is a first preset opening degree during operation. The control method can solve the noise problem of the indoor unit that is shut down, avoid misoperation of the air conditioning unit, and ensure the operation reliability of the air conditioning unit.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioning unit and its control method, computer device and readable storage medium. Background Technology

[0002] A multi-split air conditioning system consists of one outdoor unit connected to two or more indoor units. Each indoor unit has different needs. Due to the system's operating principle in heating mode, the refrigerant from the compressor first passes through the indoor unit before flowing to the electronic expansion valve. When some indoor units are off, to prevent refrigerant buildup, the electronic expansion valve of the off-duty indoor unit remains partially open. Therefore, refrigerant continues to flow through the off-duty indoor unit; otherwise, it would become a high-pressure liquid reservoir, causing the refrigerant level in the system to decrease as the unit restarts. However, the opening degree of the electronic expansion valve of the off-duty indoor unit affects the refrigerant flow rate and the noise level, leading to noise problems and potential after-sales complaints.

[0003] like Figure 1 As shown, one existing control method for air conditioning units involves fixing the opening degree of the indoor unit to a certain level p1 for a fixed period of time, running it for a fixed time t1, then fixing it to a certain level OP, and continuing to run it for a fixed time t2, repeating this cycle. This approach can effectively improve noise levels, but it doesn't consider the situation of multiple indoor units with different capacities. For example, if the opening and closing times are the same for indoor units of different capacities, a too-short opening time for the expansion valve will lead to incomplete refrigerant recovery in large-capacity indoor units, which will affect the heating performance of the prototype unit over time. Conversely, a too-long opening time for the expansion valve will not improve noise levels for small-capacity indoor units. Therefore, this solution does not consider the impact of the size of the indoor unit on the opening degree and opening / closing time, potentially leading to significant issues with noise and reliability.

[0004] like Figure 2 As shown, another existing control method for air conditioning units involves shutting down indoor units at different opening degrees (p1, p2, p3) based on their size, running for a fixed time (t1), then reducing the opening to OP, and continuing to run for a fixed time (t2), repeating this cycle. While this method considers the impact of indoor unit size on the on / off time and balances reliability and noise, the different shutdown opening degrees for different sized indoor units can lead to larger indoor units having a larger shutdown opening than their startup opening, causing the unit to start erroneously and disrupting the control logic.

[0005] In addition, there is another type of air conditioning unit that matches indoor units with different cooling capacities by controlling the opening of electronic valves. If the time is the same, the opening of the larger indoor unit will generally be larger than that of the smaller indoor unit; and more heat will be lost when the opening is larger. Summary of the Invention

[0006] The primary objective of this invention is to provide a control method for air conditioning units that solves the problem of indoor unit noise during shutdown while preventing accidental start-up of the unit and ensuring the operational reliability of the air conditioning unit.

[0007] A second objective of the present invention is to provide an air conditioning unit that implements the control method described above.

[0008] A third objective of the present invention is to provide a computer device for implementing the control method described above.

[0009] A fourth objective of this invention is to provide a readable storage medium for implementing the control method described above.

[0010] To achieve the aforementioned first objective, the present invention provides a control method for an air conditioning unit, comprising: in heating mode, determining whether an indoor unit receives a shutdown signal; if so, the shut-down indoor unit enters a shutdown indoor unit opening degree processing step; the shutdown indoor unit opening degree processing step includes: Calculate the first opening duration and the first closing duration of the corresponding throttle valve based on the capacity of the indoor unit that is shut down; The first opening duration T1 is calculated using the following formula: T1 = Min(T SET， A 1× P i +B1); The duration T2 of the first level is calculated using the following formula: T2 = Min(T SET， A 2× P i +B2); In the above formula, T SET The opening duration value of the throttle valve is obtained by conducting reliability tests on the combination of the outdoor unit and the indoor unit with the smallest capacity that can be matched with the outdoor unit. A1 is the opening duration coefficient corresponding to the first opening duration of the indoor unit that was shut down; A2 is the opening duration coefficient corresponding to the first shutdown duration of the indoor unit when it is stopped; P i The capacity of the indoor unit that is shut down; B1 is the base number of the opening duration corresponding to the first opening duration of the indoor unit that was shut down; B2 is the base number of the opening duration corresponding to the first shutdown duration of the indoor unit when it is shut down; The indoor unit that is shut down operates in a cycle of running for a first on time and then shutting down for a first off time. During operation, the opening degree of its throttle valve is the first preset opening degree.

[0011] As can be seen from the above scheme, the control method of the air conditioning unit of the present invention, by differentiating and processing different on / off durations according to the different capacities of indoor units, solves the problem of refrigerant flow noise when the indoor unit is turned off in the heating state of a multi-split air conditioner, while also avoiding adverse effects caused by setting the opening duration too short or too long. This achieves "intelligent control" of the throttle valve opening / closing duration, solving the problem of indoor unit noise during shutdown without affecting the reliability of the air conditioning unit's operation. Furthermore, this control method is simple and easy to implement. The parameter T is set according to the capacity of the indoor units that can be matched with the outdoor unit. SET And the duration A calculated based on the capacity. i× P i +B i T is obtained by performing the minimum value operation. i Avoid selecting T i An excessively long value will not effectively reduce noise, while also ensuring the performance and reliable operation of the air conditioning unit. SET To verify the reliability of the throttle valve opening duration based on the minimum possible capacity combination of the outdoor unit and the indoor units that can be paired, this invention verifies the reliability of each indoor unit under heating conditions by shutting it down one by one and setting its opening degree. The maximum reliably continuous operating time is then determined to prevent the calculated duration from exceeding the maximum sustainable operating time, which would compromise reliable operation. Furthermore, compared to existing technologies where different opening degrees have the same duration, in this invention, the heat leakage of large-capacity indoor units is relatively slow, while the heat leakage of small-capacity indoor units is relatively fast but shorter, resulting in a better user experience.

[0012] A preferred solution is that, in the indoor unit shutdown handling step, the shut-down indoor unit operates in a cycle of running for a first on duration followed by a first off duration. Before the opening of its throttle valve is the first preset opening, it is also confirmed that the shut-down indoor unit is not shut down due to fault protection and then restarted.

[0013] A further solution is that, if it is confirmed that the shut-down indoor unit is shut down due to fault protection and then restarted, the shut-down indoor unit will operate in a cycle of running for a second on time and then shutting down for a second off time. During operation, the opening degree of its throttle valve is the second preset opening degree. Among them, the first preset opening degree is less than the second preset opening degree, the second on time is longer than the first on time, and the second off time is shorter than the first off time.

[0014] Therefore, this control method can differentiate and process the opening and closing time after a fault protection shutdown, ensuring the reliable operation of the air conditioning unit. After a fault protection shutdown, it will no longer operate according to the original parameters, avoiding repeated faults and reducing the risk of user complaints.

[0015] A further proposed solution is to calculate the second opening duration T3 using the following formula: T3 = Min(T SET， A 3× P i +B3); The duration T4 of the second level is calculated using the following formula: T4 = Min(T SET， A 4× P i +B4); In the above formula, A3 is the opening duration coefficient corresponding to the second opening duration of the indoor unit that is shut down; A4 is the opening duration coefficient corresponding to the second shutdown duration of the indoor unit; B3 is the base number of the opening duration corresponding to the second opening duration of the indoor unit that was shut down; B4 is the base number of the opening duration corresponding to the second shutdown duration of the indoor unit when it is shut down.

[0016] A further option is that A1 and A3 are both decimals greater than 1, and A2 and A4 are both decimals less than 1. And / or B2 and B4 are both less than B1, and B1 < B3. And / or T SET Within the range of 100 to 140 minutes.

[0017] Therefore, the settings of A1, A2, A3, and A4 are mainly related to the base value B of the heating shutdown opening duration. i The settings are related. B1 < B3, mainly to allow for a longer opening time during operation. This is to alleviate the problem of refrigerant accumulating in the shut-down unit when it is only open for a short time during heating shutdown, thus affecting the heating effect of the operating unit. It also prevents continuous noise from the shut-down unit when it is open for an extended period during heating operation. The opening time base value B3 is obtained through reliability testing based on the smallest achievable capacity combination, and the opening time setting value under the maximum allowable pressure is determined through load switching experiments. T SET The setting is usually in the range of 100 to 140 minutes. If this parameter is exceeded, the program setting cannot guarantee reliable operation.

[0018] A further option is that at least one of the differences between B3 and B1, B3 and B2, and B3 and B4 is in the range of 20 to 50.

[0019] Therefore, by setting B1, B2, B3, and B4 appropriately, the air conditioning unit can operate within a safe pressure range.

[0020] A preferred approach is to perform a step before each cycle begins to determine whether the shut-down indoor unit is a fault-protected shutdown that will be restarted.

[0021] A preferred embodiment is that the control method further includes: when the shut-down indoor unit receives a start-up signal, the indoor unit exits the shutdown indoor unit opening process.

[0022] To achieve the second objective mentioned above, the present invention provides an air conditioning unit, which includes an outdoor unit, an indoor unit, and a processor. The number of indoor units is two or more, and each indoor unit is connected to the outdoor unit. The processor executes the program stored in the memory to implement the control method described above.

[0023] To achieve the third objective described above, the present invention provides a computer device including a processor, which executes a program stored in a memory to implement the control method described above.

[0024] To achieve the fourth objective mentioned above, the present invention provides a readable storage medium on which a program is stored, and when the program is executed by a processor, it implements the control method described above. Attached Figure Description

[0025] Figure 1 This is a graph showing the relationship between the opening degree of the indoor unit that is stopped and time in an embodiment of a control method for existing air conditioning units.

[0026] Figure 2 This is a graph showing the relationship between the opening degree of the indoor unit that is stopped and time in an embodiment of another control method for existing air conditioning units.

[0027] Figure 3 This is a flowchart of the first embodiment of the control method for the air conditioning unit of the present invention.

[0028] Figure 4 This is a graph showing the relationship between the opening degree of the indoor unit that is stopped and time in the first embodiment of the control method for the air conditioning unit of the present invention.

[0029] Figure 5 This is a flowchart of the second embodiment of the control method for the air conditioning unit of the present invention.

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0031] Various exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the invention or its application or use. The invention can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0032] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, without excluding the possibility of encompassing other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0034] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] First embodiment of the air conditioning unit and its control method: The air conditioning unit in this embodiment is a multi-split air conditioner, including an outdoor unit, indoor units, and a processor. There are two or more indoor units, each connected to an outdoor unit. The processor can be located on either the outdoor or an indoor unit. When the processor executes a program stored in its memory, it implements the control method described below. In this embodiment, the throttling valves are all electronic expansion valves, connected between the heat exchangers of the indoor and outdoor units.

[0037] See Figure 3 and Figure 4 The control method for air conditioning units includes the following steps: First, execute step S1, in heating mode, to determine if any indoor unit has received a shutdown signal.

[0038] If so, proceed to step S2. The indoor unit that has stopped will enter the shutdown indoor unit opening process, while the indoor unit that has not stopped will continue to operate with the original control logic.

[0039] The step S2 for processing the opening degree of the shut-down indoor unit includes: First, execute step S21 to calculate the first opening duration of the corresponding throttle valve and the first closing duration of the corresponding throttle valve based on the capacity of the indoor unit that is shut down.

[0040] The first opening duration T1 is calculated using the following formula: T1 = Min(T SET， A 1× P i +B1); The duration T2 of the first level is calculated using the following formula: T2 = Min(T SET， A 2× P i +B2); In the above formula, T SET The opening duration value of the throttle valve is obtained by conducting reliability tests on the combination of the outdoor unit and the indoor unit with the smallest capacity that can be matched with the outdoor unit. A1 is the opening duration coefficient corresponding to the first opening duration T1 of the shut-down indoor unit; A2 is the opening duration coefficient corresponding to the first shutdown duration T2 of the indoor unit when it is shut down; A1 is a decimal greater than 1, and A2 is a decimal less than 1; P i The capacity of the indoor unit that is shut down, for example, P i It can be 25, 35, 50, etc.; B1 is the base number of the opening duration corresponding to the first opening duration T1 of the shut-down indoor unit; B2 is the base number of the opening duration corresponding to the first shutdown duration T2 of the indoor unit that is shut down; Then execute step S22. The shut-down indoor unit runs in a cycle of running for a first on duration T1 and then shutting down for a first off duration T2. ​​When running, the opening degree of its throttle valve is the first preset opening degree P1, and when shutting down, the opening degree of its throttle valve is 0.

[0041] Next, step S3 is executed to determine whether the shut-down indoor unit has received a power-on signal.

[0042] When a shut-down indoor unit receives a power-on signal, step S31 is executed, and the corresponding indoor unit exits the shutdown indoor unit opening process and runs according to the preset control logic.

[0043] If not, meaning all indoor units are on, then proceed to step S4, and the air conditioning unit continues to operate according to the preset control logic.

[0044] Second embodiment of the air conditioning unit and its control method: As a description of the second embodiment of the air conditioning unit and its control method of the present invention, the following description only focuses on the differences from the first embodiment of the air conditioning unit and its control method described above.

[0045] See Figure 5 In this embodiment, the indoor unit shutdown opening degree processing step S5 includes: First, execute step S51 to calculate the first opening duration, the first closing duration, the second opening duration, and the second closing duration of the corresponding throttle valve based on the capacity of the indoor unit that is shut down.

[0046] The first opening duration T1 is calculated using the following formula: T1 = Min(T SET， A 1× P i +B1); The duration T2 of the first level is calculated using the following formula: T2 = Min(T SET， A 2× P i +B2); The second opening duration T3 is calculated using the following formula: T3 = Min(T SET， A 3× P i +B3); The duration T4 of the second level is calculated using the following formula: T4 = Min(T SET， A 4× P i +B4); In the above formula, T SET The throttle valve opening time value, T, is obtained by conducting reliability tests on the outdoor unit and the smallest capacity indoor unit that can be paired with it. SET Within the range of 100 to 140 minutes, optionally, T SET It lasts for 120 minutes; A1 is the opening duration coefficient corresponding to the first opening duration T1 of the shut-down indoor unit; A2 is the opening duration coefficient corresponding to the first shutdown duration T2 of the indoor unit that is shut down; A3 is the opening duration coefficient corresponding to the second opening duration T3 of the shut-down indoor unit; A4 is the opening duration coefficient corresponding to the second off duration T4 of the indoor unit when it is shut down; A1 and A3 are both decimals greater than 1, and A2 and A4 are both decimals less than 1. For example, A1 is 1.10, A2 is 0.66, A3 is 1.20, and A4 is 0.50, all of which are obtained from experimental verification. P i The capacity of the indoor unit that is shut down, for example, P i It can be 25, 35, 50, etc.; B1 is the base number of the opening duration corresponding to the first opening duration T1 of the shut-down indoor unit; B2 is the base number of the opening duration corresponding to the first shutdown duration T2 of the indoor unit that is shut down; B3 is the base number of the opening duration corresponding to the second opening duration T3 of the shut-down indoor unit; B4 is the base value of the opening duration corresponding to the second off time T4 of the indoor unit when it is shut down; B2 and B4 are both less than B1, B1 < B3, and at least one of the differences between B3 and B1, B3 and B2, and B3 and B4 is in the range of 20 to 50 minutes. For example, B1 is 40 minutes, B2 is 20 minutes, B3 is 60 minutes, and B4 is 10 minutes, all of which are obtained from experimental verification.

[0047] Next, step S52 is executed to determine whether the shut-down indoor unit was shut down due to fault protection and then restarted.

[0048] If so, proceed to step S53. The shut-down indoor unit will operate in a cycle of running for a second on duration T3 and then shutting down for a second off duration T4. During operation, the opening degree of its throttle valve is the second preset opening degree P2, and when shutting down, the opening degree of its throttle valve is 0. After the shut-down indoor unit runs for the second on duration T3, considering the performance and noise requirements of the air conditioning unit, the opening degree needs to be closed to 0 before running for the second off duration T4.

[0049] If not, proceed to step S54. The shut-down indoor unit operates in a cycle of first opening duration T1 followed by first closing duration T2. ​​During operation, the opening degree of its throttle valve is the first preset opening degree P1, and when closed, the opening degree of its throttle valve is 0. The first preset opening degree P1 is less than the second preset opening degree P2, the second opening duration T3 is greater than the first opening duration T1, and the second closing duration T4 is less than the first closing duration T2. ​​This ensures the reliability of restarting the air conditioning unit after a fault protection shutdown. After the shut-down indoor unit operates for the first opening duration T1, considering the performance and noise requirements of the air conditioning unit, the opening degree must be closed to 0 before operating for the first closing duration T2.

[0050] Before each cycle begins, step S52 must be executed to determine whether the shut-down indoor unit is shut down due to fault protection and then restarted.

[0051] The settings for A1, A2, A3, and A4 are mainly related to the base value B for the heating shutdown opening duration. iThe settings are related to this. B1 < B3, mainly to allow for a longer opening time during operation. This is to alleviate the problem of refrigerant accumulating in the shut-down unit when it only opens for a short time during heating shutdown, thus affecting the heating effect of the operating unit. It also prevents continuous noise from the shut-down unit when it runs for an extended period during heating. The opening duration base value B3 is obtained through reliability testing based on the smallest possible capacity combination. The opening duration setting value under the maximum allowable pressure is determined through load switching experiments. By reasonably setting B1, B2, B3, and B4, it is ensured that this parameter setting allows the air conditioning unit to operate within a safe pressure range. SET The setting is usually in the range of 100 to 140 minutes. If this parameter is exceeded, the program setting cannot guarantee reliable operation.

[0052] As can be seen from the above, the control method of the air conditioning unit of the present invention distinguishes and processes different switching durations according to the different sizes and capacities of the indoor units. This solves the problem of refrigerant flow noise when the indoor unit is turned off in the heating state of a multi-split air conditioner, while also avoiding the adverse effects caused by setting the opening duration too short or too long. Thus, it achieves "intelligent control" of the throttle valve switching duration, solves the problem of indoor unit noise when the unit is off, and does not affect the reliability of the air conditioning unit operation. Moreover, this control method is simple and easy to implement.

[0053] This control method can differentiate and process the opening and closing time after a fault protection shutdown, ensuring the reliable operation of the air conditioning unit. After a fault protection shutdown, it will no longer operate according to the original parameters, avoiding repeated faults and reducing the risk of user complaints.

[0054] The parameter T is set according to the capacity of the indoor unit that the outdoor unit can be paired with. SET And the duration A calculated based on the capacity. i× P i +B i T is obtained by performing the minimum value operation. i Avoid selecting T i An excessively long value will not effectively reduce noise, while also ensuring the performance and reliable operation of the air conditioning unit. SET The throttle valve opening duration value is obtained by conducting reliability tests based on the minimum capacity combination that can be matched with the outdoor unit. This is mainly done under heating conditions by turning off each matched indoor unit one by one and setting the opening degree to verify reliability. The maximum duration of reliable continuous operation is selected to prevent the duration value calculated by the above formula from exceeding the maximum sustainable operation duration, which would make reliable operation impossible.

[0055] In addition, compared with the existing technology where different opening sizes take the same amount of time, the heat leakage of the large-capacity indoor unit in this invention is relatively slow, while the heat leakage of the small-capacity indoor unit is relatively fast but the time is short, resulting in a better user experience.

[0056] Computer device embodiment: The computer device of the present invention is a controller, including a processor and a memory, such as a microcontroller containing a central processing unit. Furthermore, the processor executes a computer program stored in the memory to implement the steps of the aforementioned control method.

[0057] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0058] The memory can primarily include a program storage area and a data storage area. The program storage area can store the operating system and at least one application program required for a function (such as sound playback, image playback, etc.); the data storage area can store data created based on the use of the phone (such as audio data, phonebook, etc.). Furthermore, the memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, smart media cards (SMC), secure digital cards (SD cards), flash cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0059] Examples of computer-readable storage media: The computer-readable storage medium of the present invention can be any form of storage medium that can be read by the processor of a computer device, including but not limited to non-volatile memory, volatile memory, ferroelectric memory, etc. The computer-readable storage medium stores a computer program. When the processor of the computer device reads and executes the computer program stored in the memory, the steps of the above control method can be implemented.

[0060] Computer programs include computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. Computer-readable media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in computer-readable media can be appropriately added to or subtracted according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0061] Finally, it should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method for an air conditioning unit, characterized in that, include: In heating mode, check if any indoor unit has received a shutdown signal; If so, the shut-down indoor unit will proceed to the shut-down indoor unit opening procedure. The steps for handling the indoor unit's opening degree during shutdown include: Calculate the first opening duration and the first closing duration of the corresponding throttle valve based on the capacity of the indoor unit that is shut down; The first opening duration T1 is calculated using the following formula: T1 = Min(T SET， A 1× P i +B1); The duration T2 of the first level is calculated using the following formula: T2 = Min(T SET， A 2× P i +B2); In the above formula, T SET The opening duration value of the throttle valve is obtained by conducting reliability tests on the combination of the outdoor unit and the indoor unit with the smallest capacity that can be matched with the outdoor unit. A1 is the opening duration coefficient corresponding to the first opening duration of the indoor unit that was shut down; A2 is the opening duration coefficient corresponding to the first shutdown duration of the indoor unit when it is stopped; P i The capacity of the indoor units that are shut down; B1 is the base number of the opening duration corresponding to the first opening duration of the indoor unit that was shut down; B2 is the base number of the opening duration corresponding to the first shutdown duration of the indoor unit when it is shut down; The indoor unit that is shut down operates in a cycle of running for a first on time and then shutting down for a first off time. During operation, the opening degree of its throttle valve is the first preset opening degree.

2. The control method according to claim 1, characterized in that: In the step of handling the indoor unit's shutdown opening, the shut-down indoor unit operates in a cycle of running for a first on time and then shutting down for a first off time. Before the opening of its throttle valve is the first preset opening, it is also confirmed that the shut-down indoor unit is not shut down due to fault protection and then restarted.

3. The control method according to claim 2, characterized in that: If the indoor unit that was shut down is confirmed to have been shut down due to fault protection and then restarted, the shut-down indoor unit will run in a cycle of running for a second on time and then shutting down for a second off time. During operation, the opening degree of its throttle valve will be the second preset opening degree. Wherein, the first preset opening degree is less than the second preset opening degree, the second opening duration is greater than the first opening duration, and the second closing duration is less than the first closing duration.

4. The control method according to claim 3, characterized in that: The second opening duration T3 is calculated using the following formula: T3 = Min(T SET， A 3× P i +B3); The duration T4 of the second level is calculated using the following formula: T4 = Min(T SET， A 4× P i +B4); In the above formula, A3 is the opening duration coefficient corresponding to the second opening duration of the indoor unit that is shut down; A4 is the opening duration coefficient corresponding to the second shutdown duration of the indoor unit; B3 is the base number of the opening duration corresponding to the second opening duration of the indoor unit that was shut down; B4 is the base number of the opening duration corresponding to the second shutdown duration of the indoor unit when it is shut down.

5. The control method according to claim 4, characterized in that: A1 and A3 are both decimals greater than 1, and A2 and A4 are both decimals less than 1; and / or B2 and B4 are both less than B1, and B1 < B3; and / or T SET Within the range of 100 to 140 minutes.

6. The control method according to claim 5, characterized in that: At least one of the differences between B3 and B1, B3 and B2, and B3 and B4 is in the range of 20 to 50.

7. The control method according to any one of claims 3 to 6, characterized in that: Before each cycle begins, a step must be performed to determine whether the shut-down indoor unit is shut down due to fault protection and then restarted.

8. The control method according to any one of claims 1 to 6, characterized in that: The control method further includes: When a shut-down indoor unit receives a power-on signal, the indoor unit exits the shutdown indoor unit opening procedure.

9. An air conditioning unit, characterized in that: The air conditioning unit includes an outdoor unit, an indoor unit, and a processor. The number of indoor units is two or more, and each indoor unit is connected to the outdoor unit. The processor is used to execute a program stored in a memory to implement the control method as described in any one of claims 1 to 8.

10. A computer device, characterized in that: The computer device includes a processor that implements the control method as described in any one of claims 1 to 8 when executing a program stored in a memory.

11. A readable storage medium having a program stored thereon, characterized in that: When the program is executed by the processor, it implements the control method as described in any one of claims 1 to 8.

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