CN115479372A - Control method and device of multi-split air conditioner and computer readable storage medium - Google Patents

Control method and device of multi-split air conditioner and computer readable storage medium Download PDF

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Publication number
CN115479372A
CN115479372A CN202110606660.4A CN202110606660A CN115479372A CN 115479372 A CN115479372 A CN 115479372A CN 202110606660 A CN202110606660 A CN 202110606660A CN 115479372 A CN115479372 A CN 115479372A
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China
Prior art keywords
air conditioner
split air
cleaning
self
refrigerant
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CN202110606660.4A
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Chinese (zh)
Inventor
陶骙
黎顺全
李健锋
廖振华
朱天贵
王正兴
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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Priority to CN202110606660.4A priority Critical patent/CN115479372A/en
Publication of CN115479372A publication Critical patent/CN115479372A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00—Details
    • F28G15/003—Control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/22—Cleaning ducts or apparatus

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a control method of a multi-split air conditioner, which comprises the following steps: when a self-cleaning instruction is received, acquiring refrigerant information of the multi-split air conditioner; and executing self-cleaning operation of each indoor unit of the multi-split air conditioner according to the self-cleaning mode corresponding to the refrigerant information. The invention also discloses a control device of the multi-split air conditioner and a readable storage medium. The corresponding self-cleaning mode is flexibly selected through the refrigerant information to carry out self-cleaning, and the cleaning effect of the multi-split air conditioner can be improved.

Description

Control method and device of multi-split air conditioner and computer readable storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device of a multi-split air conditioner and a computer readable storage medium.
Background
Most of the existing multi-split air conditioner self-cleaning methods firstly control the air conditioner to operate in a refrigeration mode to enable the surface of an indoor heat exchanger to generate condensed water or frost to clean dust and dirt, and then operate in a heating mode to enable the surface temperature of the indoor heat exchanger to reach more than 56 ℃ and last for a long time to sterilize the surface of the heat exchanger. The method has the advantages of easy realization, low cost and the like, and is widely used.
However, the method has a problem that after the multi-split air conditioner enters the self-cleaning and high-temperature sterilization control, the multi-split air conditioner can control all indoor units to synchronously execute the self-cleaning operation no matter whether the refrigerant is sufficient or not, and thus, the expected cleaning effect can not be achieved under the conditions of little refrigerant or lack of refrigerant and the like.
Disclosure of Invention
The invention mainly aims to provide a control method and a control device of a multi-split air conditioner and a computer readable storage medium, and aims to solve the problem that the multi-split air conditioner has poor cleaning effect when self-cleaning is carried out so as to improve the cleaning effect of the multi-split air conditioner when self-cleaning is carried out.
In order to achieve the above object, the present invention provides a method for controlling a multi-split air conditioner, the method comprising the steps of:
when a self-cleaning instruction is received, acquiring refrigerant information of the multi-split air conditioner; and
and executing self-cleaning operation of each indoor unit of the multi-split air conditioner according to the self-cleaning mode corresponding to the refrigerant information.
Optionally, the step of performing a self-cleaning operation of each indoor unit of the multi-split air conditioner according to the self-cleaning mode corresponding to the refrigerant information includes:
when the multi-split air conditioner is determined to be lack of the refrigerant according to the refrigerant information, starting an asynchronous cleaning mode to asynchronously execute self-cleaning operation of each indoor unit of the multi-split air conditioner; and
and when the multi-split air conditioner is determined to be free of refrigerants according to the refrigerant information, starting a synchronous cleaning mode to synchronously execute the self-cleaning operation of each indoor unit of the multi-split air conditioner.
Optionally, the step of starting the asynchronous cleaning mode to asynchronously perform the self-cleaning operation of each indoor unit of the multi-split air conditioner includes:
displaying at least two asynchronous cleaning sub-modes;
receiving a mode selection instruction triggered based on the asynchronous cleaning sub-mode; and
and starting a target sub-mode corresponding to the mode selection instruction, and asynchronously executing the self-cleaning operation of each indoor unit of the multi-split air conditioner.
Optionally, the step of starting a target sub-mode corresponding to the mode selection instruction and asynchronously executing a self-cleaning operation of each indoor unit of the multi-split air conditioner includes:
if the target sub-mode is a single cleaning sub-mode, executing self-cleaning operation of the target indoor unit, and executing self-cleaning operation of the indoor units except the target indoor unit when receiving a self-cleaning instruction next time; and
and if the target sub-mode is a cleaning sub-mode one by one, sequentially executing self-cleaning operation of each indoor unit according to a preset sequence.
Optionally, the step of starting a synchronous cleaning mode to synchronously perform a self-cleaning operation of each indoor unit of the multi-split air conditioner includes:
performing refrigerant detection on the multi-split air conditioner in a refrigeration stage to obtain a first detection result;
performing refrigerant detection on the multi-split air conditioner at a frost stage to obtain a second detection result; and
and if the first detection result and the second detection result are both the refrigerant-free multi-split air conditioner, starting a synchronous cleaning mode to synchronously execute the self-cleaning operation of each indoor unit of the multi-split air conditioner in a defrosting stage.
Optionally, the step of performing refrigerant detection on the multi-split air conditioner in the refrigeration stage to obtain a first detection result includes:
acquiring a first superheat degree of the multi-split air conditioner in a refrigerating stage; and
and detecting a refrigerant of the multi-split air conditioner according to the first superheat degree to obtain the first detection result.
Optionally, the step of performing refrigerant detection on the multi-split air conditioner in the defrosting stage to obtain a second detection result includes:
acquiring a second superheat degree of the multi-split air conditioner in a frost stage; and
and detecting a refrigerant of the multi-split air conditioner according to the second superheat degree to obtain a second detection result.
Optionally, after the step of performing refrigerant detection on the multi-split air conditioner in the defrosting stage to obtain a second detection result, the method further includes:
and if the first detection result or the second detection result indicates that the multi-split air conditioner lacks a refrigerant, starting an asynchronous cleaning mode to asynchronously execute the self-cleaning operation of each indoor unit of the multi-split air conditioner.
In order to achieve the above object, the present invention further provides a control device of a multi-split air conditioner, including a memory, a processor, and a control program stored in the memory and operable on the processor, wherein the control program, when executed by the processor, implements the steps of the control method of the multi-split air conditioner as described above.
Furthermore, the present invention also provides a computer-readable storage medium storing a control program that implements the respective steps of the control method of the multi-split air conditioner as described above when executed by a processor.
In this embodiment, when a self-cleaning instruction is received, self-cleaning operation of each indoor unit of the multi-split air conditioner is performed according to a self-cleaning mode corresponding to refrigerant information by acquiring refrigerant information of the multi-split air conditioner, so that the self-cleaning mode of the multi-split air conditioner can be flexibly adjusted according to the refrigerant information, and the situation that the multi-split air conditioner is controlled to perform self-cleaning operation of each indoor unit simultaneously in the absence of refrigerant is avoided, and an expected cleaning effect cannot be achieved. That is, the self-cleaning operation of each indoor unit of the multi-split air conditioner is flexibly executed by selecting the corresponding self-cleaning mode according to the refrigerant information, and the cleaning effect of the multi-split air conditioner can be improved.
Drawings
Fig. 1 is a schematic structural diagram of a control device of a multi-split air conditioner in a hardware operating environment according to an embodiment of the present invention;
fig. 2 is a schematic flowchart illustrating a control method of a multi-split air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating a control method of a multi-split air conditioner according to another embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of a multi-split air conditioner according to another embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: when a self-cleaning instruction is received, acquiring refrigerant information of the multi-split air conditioner; and executing self-cleaning operation of each indoor unit of the multi-split air conditioner according to the self-cleaning mode corresponding to the refrigerant information.
In the prior art, no matter how the refrigerant condition of the multi-split air conditioner is, the multi-split air conditioner controls all indoor units to synchronously perform self-cleaning, and at the moment, under the conditions of lack of refrigerant or little refrigerant and the like, the corresponding indoor units cannot meet the expected cleaning requirement due to insufficient refrigerant.
The solution provided by the invention aims to improve the cleaning effect of the multi-split air conditioner during self-cleaning.
As an implementation manner, a schematic structural diagram of a control device of a multi-split air conditioner in a hardware operating environment according to an embodiment of the present invention is shown in fig. 1.
The control device of the multi-split air conditioner may include: a communication bus 1002, a processor 1001, such as a CPU, and a memory 1005. Optionally, the control device of the multi-split air conditioner may further include a user interface 1003 and a network interface 1004. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001 described previously.
Those skilled in the art will appreciate that the control device structure of the multi-split air conditioner shown in fig. 1 does not constitute a limitation of the control device of the multi-split air conditioner, and may include more or less components than those shown, or some components may be combined, or a different arrangement of components.
In the control device of the multi-split air conditioner shown in fig. 1, the network interface 1004 is mainly used for connecting a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the control program stored in the memory 1005 and perform the related steps in the following embodiments of the control method of the multi-split air conditioner.
Based on the hardware architecture of the control device of the multi-split air conditioner, various embodiments of the control method of the multi-split air conditioner are provided.
Referring to fig. 2, an embodiment of a control method of a multi-split air conditioner according to the present invention is provided. In this embodiment, the method for controlling a multi-split air conditioner includes the steps of:
step S10: when a self-cleaning instruction is received, acquiring refrigerant information of the multi-split air conditioner;
a user can trigger a self-cleaning instruction of the multi-split air conditioner in a voice mode or a key-press mode. The triggered self-cleaning command may be triggered in any one of rooms associated with the multi-split air conditioner. For example, if a user triggers a self-cleaning instruction in a room where a control device of the multi-split air conditioner is located, the control device of the multi-split air conditioner may receive the self-cleaning instruction triggered by the user, and perform self-cleaning control on the multi-split air conditioner according to the self-cleaning instruction; if the user is not in the room where the control device of the multi-split air conditioner is located but in the room where other indoor units are located, the indoor unit of the room where the user is located can receive the self-cleaning instruction triggered by the user, then the indoor unit sends the self-cleaning instruction to the control device of the multi-split air conditioner, and the control device of the multi-split air conditioner performs self-cleaning control on the multi-split air conditioner. The control device of the multi-split air conditioner can be embedded in the multi-split air conditioner or can be a control device independent of the multi-split air conditioner. For example, for an application scenario of smart home, the control device of the multi-split air conditioner may be a remote control device such as a mobile phone, and at this time, the user may trigger the self-cleaning instruction through the remote control device to realize remote control of the multi-split air conditioner.
After receiving the self-cleaning instruction, the control device of the multi-split air conditioner usually controls all indoor units to synchronously execute the self-cleaning operation, and at the moment, if the multi-split air conditioner lacks a refrigerant, the refrigerant is consumed, but the cleaning requirement cannot be met, and the cleaning effect cannot be ensured. In addition, from the viewpoint of resource utilization and electricity cost, this not only wastes refrigerant resources but also increases electricity cost. Therefore, in this embodiment, after the control device of the multi-split air conditioner obtains the self-cleaning instruction, the multi-split air conditioner is not immediately controlled to perform self-cleaning, but the refrigerant information of the multi-split air conditioner is obtained first, so as to determine how to control the multi-split air conditioner to perform self-cleaning according to the actual refrigerant condition of the multi-split air conditioner.
The refrigerant information may include: refrigerant amount information, refrigerant identification information, and the like. The refrigerant identification information can be correspondingly generated according to the detection result after the refrigerant detection is carried out each time. For example, if refrigerant detection is performed in a refrigeration stage, an icing stage and a defrosting stage of the multi-split air conditioner during self-cleaning, when the refrigerant detection result in the corresponding stage is that the multi-split air conditioner lacks refrigerant, refrigerant-lacking identification information can be correspondingly generated and stored, so that when self-cleaning refrigeration is received, whether the multi-split air conditioner lacks refrigerant can be quickly identified according to the refrigerant-lacking identification information; the refrigerant quantity information may include the residual refrigerant quantity of the multi-split air conditioner and the corresponding required refrigerant quantity of different indoor units when the different indoor units are self-cleaned, so that when the multi-split air conditioner is short of refrigerants, cleaning strategies such as determining which indoor units to clean and in which manner to clean are performed according to the refrigerant quantity information. Correspondingly, the manner of acquiring the refrigerant information may be: the detection result is obtained by a refrigerant detection device, or the detection result may be obtained by calculation based on an operation parameter of the multi-split air conditioner, or the detection result may be obtained from a preset storage area, and the like, and the detection result is not specifically limited herein.
Step S20: executing self-cleaning operation of each indoor unit of the multi-split air conditioner according to a self-cleaning mode corresponding to the refrigerant information;
under the condition that the multi-split air conditioner lacks a refrigerant, if all the indoor units are automatically cleaned synchronously, the indoor units may not meet the cleaning requirement, so that the resource waste is caused; under the condition that the multi-split air conditioner does not lack the refrigerant, if part of indoor units are self-cleaned, the refrigerant lack condition may exist during the next self-cleaning, and the self-cleaning efficiency is not favorably improved. Therefore, in order to improve the self-cleaning efficiency and the resource utilization rate and ensure timely and efficient self-cleaning, different cleaning strategies need to be adopted for self-cleaning according to different refrigerant information. Therefore, after the refrigerant information is obtained, whether the multi-split air conditioner lacks the refrigerant can be determined according to the refrigerant quantity information, the refrigerant identification information and the like contained in the refrigerant information, and then the multi-split air conditioner can be cleaned in different cleaning modes according to the refrigerant shortage condition of the multi-split air conditioner and the refrigerant shortage condition of the multi-split air conditioner.
The condition that the refrigerant quantity of the multi-split air conditioner is not enough to support all indoor units to carry out self-cleaning is referred to as refrigerant shortage of the multi-split air conditioner; the self-cleaning mode corresponding to the refrigerant information can be an automatic cleaning mode or a manual cleaning mode and the like if the self-cleaning mode is distinguished according to the control mode; if the cleaning modes are classified in a synchronous manner, the cleaning modes may be a single cleaning mode, a cleaning mode by each cleaning mode, a partially synchronous cleaning mode, a synchronous cleaning mode, or the like. Wherein, the single cleaning mode can be that only one indoor unit is cleaned when a self-cleaning instruction is received each time; the cleaning mode one by one can be that when a self-cleaning instruction is received each time, a plurality of indoor units are cleaned one by one; the partial synchronization mode can be that after receiving the self-cleaning instruction each time, the self-cleaning of partial indoor units is completed synchronously; the synchronous cleaning mode can be that after receiving the self-cleaning instruction each time, the self-cleaning of all indoor units is completed synchronously; the automatic cleaning mode refers to a self-cleaning mode which can be automatically determined by a control device of the multi-split air conditioner based on the acquired refrigerant information, for example, when the refrigerant quantity is only enough to support one indoor unit for self-cleaning, the self-cleaning of the single indoor unit can be automatically selected; the manual cleaning mode refers to a self-cleaning instruction which can be manually selected by a user based on currently displayed refrigerant information to meet self requirements, for example, when the multi-split air conditioner is determined to be in a refrigerant lack state based on the displayed refrigerant information, the user can select an indoor unit which is urgently used according to the urgency degree of cleaning of the indoor unit to carry out synchronous self-cleaning, and other indoor units are not cleaned temporarily.
On one hand, if it is determined that the multi-split air conditioner has a refrigerant shortage condition according to the refrigerant quantity information, the refrigerant identification information and the like included in the refrigerant information, the self-cleaning mode corresponding to the refrigerant information may be a single cleaning mode, a one-by-one cleaning mode, a partially synchronous cleaning mode and the like. At the moment, self-cleaning modes such as a single cleaning mode, a cleaning mode one by one, a partial synchronous cleaning mode and the like can be started according to the degree of lack of the refrigerant to carry out asynchronous self-cleaning on the corresponding indoor unit. For example, a target indoor unit which can be cleaned and corresponds to a current refrigerant can be determined according to refrigerant information, the target indoor unit is cleaned first, and other indoor units can be cleaned when a self-cleaning instruction is received next time; if the situation that the multi-split air conditioner is lack of refrigerants is determined according to the refrigerant quantity information, the refrigerant identification information and the like contained in the refrigerant information, it is indicated that the refrigerant quantity of the multi-split air conditioner is still sufficient after the multi-split air conditioner is automatically cleaned last time, enough multi-split air conditioners synchronously execute the self-cleaning of all indoor units, and at the moment, the self-cleaning mode corresponding to the refrigerant information can be a synchronous cleaning mode. At this time, all indoor units can be synchronously self-cleaned.
Thus, if the self-cleaning mode corresponding to the refrigerant information is a single cleaning mode, the single indoor unit can be controlled to carry out self-cleaning each time a self-cleaning instruction is received, so that different indoor units can complete self-cleaning under different self-cleaning instructions, and the self-cleaning of the indoor units can be completed asynchronously; if the self-cleaning mode corresponding to the refrigerant information is a cleaning mode one by one, the self-cleaning of the cleanable indoor units can be controlled one by one after each indoor unit finishes self-cleaning each time the self-cleaning instruction is received, and other indoor units which cannot be cleaned can be cleaned when the self-cleaning instruction is received next time, so that different indoor units can finish self-cleaning at different time points and different self-cleaning instructions to realize asynchronous self-cleaning of the indoor units; if the self-cleaning mode corresponding to the refrigerant information is a partial synchronous mode, each cleanable indoor unit can be controlled to synchronously complete self-cleaning when a self-cleaning instruction is received each time, and other uncleanable indoor units are controlled to complete self-cleaning when the self-cleaning instruction is received next time, so that each indoor unit can be controlled in batches to complete self-cleaning, and the self-cleaning of the indoor units of the multi-split air conditioner can be asynchronously completed.
On the other hand, if it is determined that the multi-split air conditioner has a refrigerant shortage condition according to the refrigerant quantity information, the refrigerant identification information and the like included in the refrigerant information, the self-cleaning mode corresponding to the refrigerant information may be a synchronous cleaning mode, and all indoor units may be synchronously self-cleaned through the synchronous cleaning mode.
Of course, no matter in the case that the multi-split air conditioner lacks the refrigerant or in the case that the multi-split air conditioner does not lack the refrigerant, the user may select a self-cleaning mode meeting the user's requirements from the self-cleaning modes corresponding to the refrigerant information according to the displayed refrigerant information after displaying the acquired refrigerant information, which is not limited in detail herein.
According to the embodiment, the self-cleaning mode which is currently applicable to the multi-split air conditioner is flexibly selected through the refrigerant information, so that when the multi-split air conditioner controls each indoor unit to execute the self-cleaning operation in the selected self-cleaning mode, refrigerant detection and self-cleaning of the multi-split air conditioner are combined, the indoor units which perform self-cleaning can achieve the expected cleaning effect, effective self-cleaning is achieved, and meanwhile, the situation that only part of indoor units are cleaned when the refrigerants are sufficient is avoided, so that the cleaning efficiency is not beneficial to improvement; and the resource waste caused by synchronously cleaning all indoor units when the refrigerant is insufficient.
Based on the above embodiment, another embodiment of the control method of the multi-split air conditioner of the present invention is provided. Referring to fig. 3, in this embodiment, step S20 may include the following steps:
step S21: when the fact that the multi-split air conditioner lacks the refrigerant is determined according to the refrigerant information, an asynchronous cleaning mode is started to asynchronously execute self-cleaning operation of each indoor unit of the multi-split air conditioner; and
step S22: and when the multi-split air conditioner is determined to be free of refrigerants according to the refrigerant information, starting a synchronous cleaning mode to synchronously execute the self-cleaning operation of each indoor unit of the multi-split air conditioner.
In this embodiment, the self-cleaning mode corresponding to the refrigerant information may be divided into an asynchronous cleaning mode and a synchronous cleaning mode. The asynchronous cleaning mode may include a single cleaning mode, a cleaning mode by one, a partially synchronous cleaning mode, a synchronous cleaning mode, and the like.
Therefore, when the corresponding asynchronous cleaning mode or synchronous cleaning mode is selected according to different refrigerant conditions, the current refrigerant condition of the multi-split air conditioner needs to be determined based on the refrigerant information. For example, if it is determined whether the multi-split air conditioner lacks refrigerants based on the refrigerant quantity information in the refrigerant information, the total amount of the refrigerants required for self-cleaning of all indoor units of the multi-split air conditioner and the amount of the refrigerants currently remaining in the multi-split air conditioner may be determined according to the refrigerant quantity information, and then the amount of the refrigerants currently remaining in the multi-split air conditioner and the total amount of the refrigerants correspondingly required for all the indoor units are compared, and if the amount of the refrigerants currently remaining in the multi-split air conditioner is smaller than the total amount of the refrigerants correspondingly required for cleaning all the indoor units, it is determined that the multi-split air conditioner lacks refrigerants; and if the current residual refrigerant quantity of the multi-split air conditioner is greater than or equal to the total refrigerant quantity correspondingly required for cleaning all indoor units, determining that the multi-split air conditioner is not lack of refrigerant. If the multi-split air conditioner is determined to lack the refrigerant based on the refrigerant quantity identification information in the refrigerant information, when the refrigerant lack identification information is detected, the multi-split air conditioner is determined to lack the refrigerant; if the refrigerant shortage identification information is not detected, the multi-split air conditioner is considered to be free of refrigerant shortage, and at the moment, refrigerant shortage detection can be further performed on the multi-split air conditioner, so that the accuracy of the refrigerant shortage detection of the multi-split air conditioner is ensured. Of course, the refrigerant shortage detection can be performed on the multi-split air conditioner by combining the refrigerant quantity information and the refrigerant identification information, so that a dual guarantee effect is achieved, and the accuracy of refrigerant shortage detection is ensured.
If the situation that the multi-split air conditioner lacks the refrigerant is determined through the mode, the asynchronous cleaning function of the multi-split air conditioner can be started correspondingly to perform asynchronous cleaning on the corresponding indoor unit. As to which asynchronous cleaning mode is specifically adopted, the asynchronous cleaning mode can be automatically determined by a control device of the multi-split air conditioner based on refrigerant information. Specifically, the currently remaining refrigerant quantity of the multi-split air conditioner and the refrigerant quantity required by each indoor unit for self-cleaning can be determined based on the refrigerant quantity information, the currently remaining refrigerant quantity is determined to be enough to support which indoor units to complete self-cleaning, and then the corresponding asynchronous cleaning mode is determined according to the determined indoor units capable of completing self-cleaning. For example, if it is determined that the current remaining refrigerant quantity can support the indoor unit of the living room to complete self-cleaning, the corresponding asynchronous cleaning mode may be to perform self-cleaning on the indoor unit of the living room after closing the electronic expansion valves of other indoor units; if it is determined that the current amount of the remaining refrigerant can support the indoor units of the two bedrooms to complete self-cleaning, the corresponding asynchronous cleaning mode can be that after electronic expansion valves of other indoor units are closed, the two indoor units are simultaneously self-cleaned, or the two indoor units are cleaned one by one. In order to avoid the problem of refrigerant leakage and the like, which leads to that the two indoor units cannot meet the cleaning requirement when the two indoor units are cleaned simultaneously by using the residual refrigerant amount, the two indoor units are preferably controlled to clean one by one, so that after the first indoor unit is controlled to carry out self-cleaning, refrigerant detection can be carried out once again, and whether the next indoor unit is controlled to carry out self-cleaning or not is determined according to the result of the refrigerant detection; if two or more parallel schemes exist, for example, the current residual refrigerant quantity can support the indoor units of the living room to perform self-cleaning, and can also support the indoor units of two bedrooms to perform self-cleaning, corresponding priorities can be set for different indoor units in advance, so that a target scheme can be screened out from the multiple parallel schemes according to the set priorities, and a self-cleaning mode corresponding to the target scheme is determined.
In one embodiment, in order to enable the multi-split air conditioner to meet the cleaning requirements of the user after self-cleaning, the user may select a corresponding asynchronous cleaning sub-mode from the asynchronous cleaning sub-modes corresponding to the asynchronous cleaning mode according to the self-requirement. Specifically, the control device of the multi-split air conditioner may obtain two or more asynchronous cleaning sub-patterns included in the asynchronous cleaning mode, such as at least two of a single cleaning mode, a cleaning mode by cleaning mode, a partially synchronous cleaning mode, and a synchronous cleaning mode, and may display the obtained asynchronous cleaning sub-patterns on a display device of the multi-split air conditioner or a display device (e.g., a display screen) of the multi-split air conditioner. In this way, the user can trigger the mode selection command by voice or pressing a button or the like based on the displayed asynchronous cleaning submode. Furthermore, each indoor unit of the multi-split air conditioner can be asynchronously and automatically cleaned based on the target sub-mode corresponding to the mode selection instruction triggered by the user. In a specific application scenario, a user can select an instruction according to trigger modes such as the filth blockage degree and the cleaning frequency of different indoor units. For example, in the case of lack of refrigerant, if the indoor unit in the bedroom is seriously clogged and needs to be cleaned urgently, the mode selection instruction can be triggered to select the single cleaning mode so as to control the multi-split air conditioner to perform self-cleaning of the indoor unit in the bedroom, so that the electronic expansion valves of other indoor units are in a closed state, the multi-split air conditioner can quit self-cleaning after the self-cleaning of the indoor unit in the bedroom is completed, and the multi-split air conditioner is controlled to perform self-cleaning of other indoor units when the subsequent time is sufficient. Of course, when the user is not using the air conditioner urgently, the user may send a mode selection instruction to the multi-split air conditioner before going out to select a synchronous cleaning instruction, so as to control each indoor unit of the multi-split air conditioner to automatically complete self-cleaning in a synchronous manner.
In an embodiment, the sub-asynchronous cleaning modes of the multi-split air conditioner may include a single cleaning mode and a cleaning mode, and as to which is the single cleaning mode and which is the cleaning mode, the above embodiments have been described and are not repeated herein.
(1) If the target sub-mode selected by the user is the single cleaning mode, a target indoor unit which needs self-cleaning currently in the multi-split air conditioner needs to be determined first, so that self-cleaning of the target indoor unit is completed. Furthermore, after the self-cleaning of the target indoor unit is finished, the refrigerant information of the multi-split air conditioner at the moment can be correspondingly output, so that a user can confirm whether other indoor units need to be cleaned or not based on the refrigerant information at the moment. On one hand, if the user selects to quit self-cleaning, the self-cleaning of other indoor units is not executed, and when a self-cleaning instruction is received next time, whether to perform self-cleaning on other indoor units except the target indoor unit or how to perform self-cleaning on other indoor units except the target indoor unit is determined; on the other hand, if the user selects to continue to operate in the single cleaning mode, the next indoor unit needing to be cleaned is continuously determined, the next indoor unit is automatically cleaned, refrigerant information of the multi-split air conditioner at the moment is correspondingly output after the automatic cleaning is finished, and the rest can be done in the same way; on the other hand, if the user selects to continue to operate in the cleaning mode one by one, the self-cleaning of the indoor units except the target indoor unit can be finished one by one according to the preset execution sequence and the address codes of different indoor units, and when each indoor unit of the multi-split air conditioner is self-cleaned, the electronic expansion valves of other indoor units are required to be correspondingly closed so as to realize asynchronous self-cleaning of each indoor unit.
(2) If the target sub-mode selected by the user is a cleaning instruction one by one, self-cleaning of the indoor units except the target indoor unit can be completed one by one according to the address codes of different indoor units directly according to the preset execution sequence, and when each indoor unit of the multi-split air conditioner is self-cleaned, the electronic expansion valves of other indoor units are required to be correspondingly closed so as to realize asynchronous self-cleaning of each indoor unit.
In the embodiment, the user autonomously selects the cleaning mode according to the refrigerant information, so that when each indoor unit of the multi-split air conditioner completes self-cleaning, the resource utilization rate can be improved, the cleaning requirement of the user on the multi-split air conditioner can be met, and the user experience can be improved.
Based on the above embodiment, another embodiment of the control method of the multi-split air conditioner of the present invention is provided. Referring to fig. 4, in this embodiment, the step of starting the synchronous cleaning mode to synchronously perform the self-cleaning operation of each indoor unit of the multi-split air conditioner may include:
step S221: performing refrigerant detection on the multi-split air conditioner in a refrigeration stage to obtain a first detection result;
step S222: performing refrigerant detection on the multi-split air conditioner at a frost stage to obtain a second detection result;
step S223: and if the first detection result and the second detection result are both the refrigerant-free multi-split air conditioner, starting a synchronous cleaning mode to synchronously execute the self-cleaning operation of each indoor unit of the multi-split air conditioner in a defrosting stage.
In this embodiment, the self-cleaning of the multi-split air conditioner may sequentially include four stages, namely, a refrigeration stage, an ice-frost stage, a high-temperature defrosting stage, and a high-temperature sterilization stage. Besides the refrigerant detection based on the refrigerant information when the self-cleaning instruction is received, the refrigerant detection is performed at a refrigeration stage, and the refrigerant detection is performed at a frost stage, so that the accuracy of the refrigerant detection is improved.
Specifically, after the control device of the multi-split air conditioner receives the self-cleaning instruction, if the multi-split air conditioner is detected to be free of refrigerant, the multi-split air conditioner can be controlled to enter a first stage of self-cleaning operation: a refrigeration stage, wherein whether the multi-split air conditioner lacks a refrigerant is detected again in the refrigeration stage to obtain a first detection result corresponding to the refrigeration stage; furthermore, when the first detection result indicates that the multi-split air conditioner is not lack of refrigerant, if the running time of the compressor reaches the first running time or the multi-split air conditioner reaches the condition of exiting the refrigeration stage, the multi-split air conditioner can be controlled to enter the second stage of self-cleaning operation: a frost stage; the condition for exiting the refrigeration stage can be that the temperature of the evaporator of any indoor unit is less than or equal to a preset temperature (such as minus 10 ℃) for a preset time (such as 3 min), or the shutdown protection function of the multi-split air conditioner is triggered; the first run time is the total length of time the compressor needs to run during the refrigeration stage, e.g., 10min.
Further, whether the multi-split air conditioner is lack of the refrigerant or not can be detected again in the defrosting stage, so that a second detection result corresponding to the defrosting stage can be obtained. Furthermore, when the second detection result is that the multi-split air conditioner is not lack of refrigerant, if the running time of the compressor reaches the second running time or the multi-split air conditioner reaches the condition of exiting the frost stage, the multi-split air conditioner can be controlled to enter a third stage and a fourth stage of self-cleaning operation: a high-temperature defrosting stage and a high-temperature sterilizing stage. At the moment, the multi-split air conditioner can synchronously execute self-cleaning operation of each indoor unit, so that the cleaning efficiency of the indoor units can be improved; and when the multi-split air conditioner synchronously executes self-cleaning and operation of each indoor unit, the condition of lacking the refrigerant is obvious, and the condition of lacking the refrigerant can be detected in time, so that corresponding adjustment is made to avoid resource waste. Wherein, the condition for exiting the frost stage may be: the temperature of an evaporator of any indoor unit is less than or equal to a preset temperature (such as minus 10 ℃) for reaching a preset time (such as 3 min), or the shutdown protection function of the multi-split air conditioner is triggered; the second operation time is the total time of the compressor in the refrigeration stage and the frost stage, such as 20min.
In addition, when the multi-split air conditioner is determined to be free of the refrigerant based on the refrigerant information, if the first detection result indicates that the multi-split air conditioner is free of the refrigerant or the second detection result indicates that the multi-split air conditioner is free of the refrigerant, no matter what type of the multi-split air conditioner is, the control device of the multi-split air conditioner can automatically determine a corresponding asynchronous cleaning mode according to the amount of the refrigerant at the moment to perform asynchronous cleaning, and waste of resources is avoided; and the refrigerant information at the moment can be output, a user selects a corresponding self-cleaning mode based on the refrigerant information at the moment and according to the self-cleaning requirement, and self-cleaning is carried out in a default mode if a mode selection instruction fed back by the user is not received within preset time. Here, the default mode may be a cleaning mode one by one, or a single cleaning mode, and the default mode may be set according to specific application requirements, and is not limited specifically here.
Because the liquid-phase refrigerant needs to absorb heat when vaporized and absorbs the same heat, and the superheat degree when the refrigerant is small is obviously greater than the superheat degree when the refrigerant is large, the refrigerant detection can be performed on the multi-split air conditioner based on the superheat degree, and the phenomenon that misjudgment is easily caused due to the large calculated amount, the low feedback speed of the refrigerant from heat transfer to the outlet air temperature and the like when the refrigerant detection is performed by adopting the outlet air temperature or the outlet air quantity and the like is avoided.
In one embodiment, the first detection result may be obtained based on a degree of superheat in the refrigeration phase. Different refrigeration systems are correspondingly adopted for different types of multi-split air conditioners; different types of refrigeration systems need to adopt different refrigerant detection schemes to perform refrigerant detection, so that the accuracy of refrigerant detection is improved. For example, when refrigerant detection is performed based on the degree of superheat, a refrigerant system having a pressure detection device and a refrigerant system not having a pressure detection device have different calculation methods for the degree of superheat, and thus have different corresponding refrigerant detection schemes. The first superheat degree of the first type of multi-split air conditioners without the pressure detection devices in the refrigeration stage is a first difference value between the suction saturation temperature and the average value of the coil temperature, so that whether the first type of multi-split air conditioners lack refrigerants or not can be determined according to the first difference value; the first superheat degree of the second multi-split air conditioner with the pressure detection device in the refrigeration stage is a second difference value of the suction saturation temperature and the saturation temperature corresponding to the suction pressure, so that whether the second multi-split air conditioner lacks a refrigerant can be determined according to the second difference value.
In order to further improve the accuracy of refrigerant detection in the refrigeration stage and avoid misjudgment, the refrigerant detection mode of the multi-split air conditioner in the refrigeration stage may specifically be: and when the running time of the compressor reaches a first preset time, determining whether the first multi-split air conditioner lacks the refrigerant in the refrigeration stage according to the first difference or determining whether the second multi-split air conditioner lacks the refrigerant in the refrigeration stage according to the second difference. On one hand, when the running time of the compressor reaches a first preset time, if a first difference value between the suction saturation temperature and the average value of the coil pipe temperature is greater than or equal to a first preset difference value, the situation that the first type of multi-connected air conditioner lacks a refrigerant in the refrigeration stage can be determined; if the first difference between the suction saturation temperature and the average value of the coil pipe temperatures is smaller than the first preset difference, it can be determined that the first multi-split air conditioner does not have the condition of lack of refrigerant in the refrigeration stage. On the other hand, when the running time of the compressor reaches the first preset time, if a second difference value of the saturation temperature corresponding to the suction saturation temperature and the suction pressure is greater than or equal to a second preset difference value, the situation that the second type of multi-split air conditioner lacks a refrigerant in the refrigeration stage can be determined; and if the second difference value between the suction saturation temperature and the saturation temperature corresponding to the suction pressure is smaller than the second preset difference value, determining that the second type of multi-split air conditioner does not have the condition of lack of refrigerant in the refrigeration stage.
It should be noted that the first preset difference and the second preset difference may be set according to actual application requirements, and the first preset difference and the second preset difference may be the same or different. The first preset difference and the second preset difference in this embodiment may be set to be the same preset value, and the temperature range of the preset value may preferably be 2-6 ℃, and in this embodiment, it is preferable to use 3 ℃ as the first preset difference. Furthermore, the total operation time of the refrigeration stage compressor is generally 10 minutes, and in the present embodiment, the first preset time may be preferably 5 minutes.
In another embodiment, the second detection result may be obtained based on a degree of superheat in the frost phase. Similarly, different types of multi-split air conditioners are different in correspondingly adopted refrigeration systems; different types of refrigeration systems need to adopt different refrigerant detection schemes to perform refrigerant detection, so that the accuracy of refrigerant detection is improved. The second superheat degree of the first multi-split air conditioner in the icing stage is a third difference value between the air suction saturation temperature in the icing stage and the average value of the temperatures of the coils, and the second superheat degree of the second multi-split air conditioner in the icing stage is a fourth difference value between the air suction saturation temperature in the icing stage and the saturation temperature corresponding to the air suction pressure, so that whether the first multi-split air conditioner lacks the refrigerant in the icing stage can be determined according to the third difference value, and whether the second multi-split air conditioner lacks the refrigerant in the icing stage can be determined according to the fourth difference value.
Similarly, in order to further improve the accuracy of refrigerant detection in the frost stage and avoid erroneous determination, in an embodiment, the refrigerant detection method of the multi-split air conditioner in the frost stage may specifically be: and when the running time of the compressor reaches a second preset time, determining whether the first multi-split air conditioner lacks the refrigerant in the frost stage according to a third difference value or determining whether the second multi-split air conditioner lacks the refrigerant in the frost stage according to a fourth difference value. On one hand, when the running time of the compressor reaches a second preset time, if a third difference value between the suction saturation temperature and the average value of the coil pipe temperature is greater than or equal to a third preset difference value, the condition that the first multi-split air conditioner lacks a refrigerant in the frost stage can be determined; and if the third difference between the suction saturation temperature and the average value of the coil pipe temperatures is smaller than the third preset difference, determining that the first type of multi-split air conditioner does not lack the refrigerant in the defrosting stage. On the other hand, when the running time of the compressor reaches a second preset time, if a fourth difference value of the saturation temperature corresponding to the suction saturation temperature and the suction pressure is greater than or equal to a fourth preset difference value, the situation that the second type of multi-split air conditioner lacks the refrigerant in the defrosting stage can be determined; and if the fourth difference value between the suction saturation temperature and the saturation temperature corresponding to the suction pressure is smaller than the fourth preset difference value, determining that the second type of multi-split air conditioner does not have the condition of lack of the refrigerant in the defrosting stage.
It should be noted that the third preset difference and the fourth preset difference may be set according to actual application requirements, and the third preset difference and the fourth preset difference may be the same or different. The third preset difference and the fourth preset difference in this embodiment may be set to be the same preset value, and the temperature range of the preset value may preferably be 2-6 ℃, and in this embodiment, 2 ℃ is preferably used as the third preset difference. In addition, generally, the total operation time of the compressor in the frost stage is also 10min, that is, the total operation time of the compressor from the refrigeration stage to the frost stage is 20min, and in this embodiment, the second preset time may be preferably 15min.
In the embodiment, when the multi-split air conditioner receives the self-cleaning instruction, the condition of lacking the refrigerant does not exist, and the condition of lacking the refrigerant does not exist in the refrigeration stage and the frost stage, the self-cleaning operation of each indoor unit of the multi-split air conditioner is synchronously executed, so that the accuracy of detecting the lacking refrigerant can be ensured, and the self-cleaning efficiency can be effectively improved by starting the synchronous cleaning mode.
Furthermore, an embodiment of the present invention also provides a computer-readable storage medium having a control program stored thereon, where the control program, when executed by a processor, implements the steps of the control method of the multi-split air conditioner as described above.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. The control method of the multi-split air conditioner is characterized by comprising the following steps:
when a self-cleaning instruction is received, acquiring refrigerant information of the multi-split air conditioner; and
and executing self-cleaning operation of each indoor unit of the multi-split air conditioner according to the self-cleaning mode corresponding to the refrigerant information.
2. The method as claimed in claim 1, wherein the step of performing the self-cleaning operation of each indoor unit of the multi-split air conditioner according to the self-cleaning mode corresponding to the cooling medium information comprises:
when the fact that the multi-split air conditioner lacks the refrigerant is determined according to the refrigerant information, an asynchronous cleaning mode is started to asynchronously execute self-cleaning operation of each indoor unit of the multi-split air conditioner; and
and when the refrigerant information is determined that the multi-split air conditioner is not lack of refrigerant, starting a synchronous cleaning mode to synchronously execute the self-cleaning operation of each indoor unit of the multi-split air conditioner.
3. The method as claimed in claim 2, wherein the step of starting the asynchronous cleaning mode to asynchronously perform the self-cleaning operation of each indoor unit of the multi-split air conditioner comprises:
displaying at least two asynchronous cleaning sub-modes;
receiving a mode selection instruction triggered based on the asynchronous cleaning sub-mode; and
and starting a target sub-mode corresponding to the mode selection instruction, and asynchronously executing the self-cleaning operation of each indoor unit of the multi-split air conditioner.
4. The method as claimed in claim 3, wherein the step of starting the target sub-mode corresponding to the mode selection command and asynchronously performing the self-cleaning operation of each indoor unit of the multi-split air conditioner comprises:
if the target sub-mode is a single cleaning sub-mode, executing self-cleaning operation of the target indoor unit, and executing self-cleaning operation of the indoor units except the target indoor unit when receiving a self-cleaning instruction next time; and
and if the target sub-mode is a cleaning sub-mode one by one, sequentially executing self-cleaning operation of each indoor unit according to a preset sequence.
5. The method for controlling a multi-split air conditioner as claimed in claim 2, wherein the step of starting a synchronous cleaning mode to synchronously perform the self-cleaning operation of each indoor unit of the multi-split air conditioner comprises:
performing refrigerant detection on the multi-split air conditioner in a refrigeration stage to obtain a first detection result;
performing refrigerant detection on the multi-split air conditioner at a frost stage to obtain a second detection result; and
and if the first detection result and the second detection result are both the refrigerant-free multi-split air conditioner, starting a synchronous cleaning mode to synchronously execute the self-cleaning operation of each indoor unit of the multi-split air conditioner in a defrosting stage.
6. The method for controlling a multi-split air conditioner according to claim 5, wherein the step of performing refrigerant detection on the multi-split air conditioner in a refrigeration stage to obtain a first detection result includes:
acquiring a first superheat degree of the multi-split air conditioner in a refrigerating stage; and
and detecting a refrigerant of the multi-split air conditioner according to the first superheat degree to obtain the first detection result.
7. The method for controlling a multi-split air conditioner according to claim 5, wherein the step of performing refrigerant detection on the multi-split air conditioner in a frost phase to obtain a second detection result comprises:
acquiring a second superheat degree of the multi-split air conditioner in a frost stage; and
and detecting a refrigerant of the multi-split air conditioner according to the second superheat degree to obtain a second detection result.
8. The method for controlling a multi-split air conditioner according to claim 5, wherein after the step of performing refrigerant detection on the multi-split air conditioner in a frost phase to obtain a second detection result, the method further comprises:
and if the first detection result or the second detection result indicates that the multi-split air conditioner lacks a refrigerant, starting an asynchronous cleaning mode to asynchronously execute the self-cleaning operation of each indoor unit of the multi-split air conditioner.
9. A control apparatus of a multi-split air conditioner, comprising a memory, a processor, and a control program of the multi-split air conditioner stored in the memory and operable on the processor, wherein the processor implements the control method of the multi-split air conditioner as set forth in any one of claims 1 to 8 when executing the control program of the multi-split air conditioner.
10. A computer-readable storage medium, having stored thereon a control program of a multi-split air conditioner for controlling the multi-split air conditioner, wherein the control program of the multi-split air conditioner, when executed by a processor, implements the control method of the multi-split air conditioner according to any one of claims 1 to 8.
CN202110606660.4A 2021-05-31 2021-05-31 Control method and device of multi-split air conditioner and computer readable storage medium Pending CN115479372A (en)

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Application Number Priority Date Filing Date Title
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