Multi-split air conditioner control method, multi-split air conditioner and storage medium

Abstract

Disclosed in the present application are a multi-split air conditioner control method, a multi-split air conditioner and a storage medium. The multi-split air conditioner comprises an outdoor unit and at least two indoor units connected to the outdoor unit, one or more indoor units being target indoor units; the outdoor unit comprises at least two control valves and at least two electronic expansion valves, the control valves, the indoor units and the electronic expansion valves are arranged on a one-to-one basis, and the control valves, the indoor units corresponding to the control valves and the electronic expansion valves corresponding to the control valves are sequentially connected. The method comprises: controlling a multi-split air conditioner to operate in a first mode, so as to obtain the heat exchange demand state of a target indoor unit; and when the heat exchange demand state satisfies a first condition, controlling a corresponding control valve to be closed, wherein the first condition indicates that the target indoor unit does not have an energy requirement corresponding to the first mode, and in the first mode, a refrigerant flows in a direction from the control valve to an electronic expansion valve.

Description

Control method of multi-connected air conditioner, multi-connected air conditioner and storage medium

[0001] The present application claims priority to Chinese Patent Application No. 202410644969.6, filed on May 22, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of air conditioners, in particular to a control method of a multi-connected air conditioner, a multi-connected air conditioner and a storage medium. BACKGROUND

[0003] The multi-connected air conditioner is generally provided with one indoor unit and multiple indoor units. During the heating operation of the outdoor unit, the electronic expansion valve in the indoor unit is located at the outlet side of the indoor heat exchanger. Regardless of whether the indoor unit is turned on or not, the refrigerant will flow through all the indoor units, which not only causes energy loss and noise of the system, but also causes the indoor unit without the need to radiate heat exchange capacity, affecting the comfort of the space. TECHNICAL PROBLEM

[0004] The main purpose of the present application is to provide a control method of a multi-connected air conditioner, a multi-connected air conditioner and a storage medium, which aims to reduce the energy loss and noise of the multi-connected air conditioner and improve the indoor comfort. TECHNICAL SOLUTION

[0005] To achieve the above-mentioned purpose, the present application provides a control method of a multi-connected air conditioner, the multi-connected air conditioner comprising an outdoor unit and at least two indoor units connected with the outdoor unit, one or more of the indoor units being a target indoor unit, the outdoor unit comprising at least two control valves and at least two electronic expansion valves, the control valves, the indoor units and the electronic expansion valves being one-to-one correspondingly arranged, the control valves, the indoor units corresponding to the control valves and the electronic expansion valves corresponding to the control valves being connected in sequence, the method comprising:

[0006] controlling the multi-connected air conditioner to run in a first mode, and acquiring a heat exchange demand state of the target indoor unit;

[0007] in a case where the heat exchange demand state satisfies a first condition, controlling the corresponding control valve to be closed;

[0008] wherein the first condition indicates that the target indoor unit does not have the need for the first mode corresponding to the first mode, and the refrigerant flow direction in the first mode is directed to the electronic expansion valve by the control valve.

[0009] In an embodiment, the first condition comprises that the target indoor unit does not have the need or the target indoor unit demands a second mode of heat exchange;

[0010] The second mode is a mode in which the refrigerant stops flowing or the refrigerant flows to the control valve pointed by the electronic expansion valve.

[0011] In an embodiment, the method further comprises, after or while the step of controlling the corresponding control valve to close is performed:

[0012] The electronic expansion valve corresponding to the control valve is controlled to close.

[0013] In an embodiment, the method further comprises:

[0014] The step of controlling the multi-split air conditioner to run the first mode and obtaining the heat exchange demand state of the target indoor unit is performed when the multi-split air conditioner is currently running the second mode and the heat exchange mode demanded by the target indoor unit is the first mode; and / or,

[0015] The control valve is controlled to open when the multi-split air conditioner is currently running the second mode and the heat exchange mode demanded by the target indoor unit is the second mode.

[0016] In an embodiment, the method further comprises, after the step of controlling the multi-split air conditioner to run the first mode:

[0017] When the multi-split air conditioner meets the defrosting condition, the multi-split air conditioner is controlled to run a defrosting mode to defrost the outdoor heat exchanger, and all the control valves are controlled to open.

[0018] When the multi-split air conditioner does not meet the defrosting condition, the step of obtaining the heat exchange demand state of the target indoor unit is performed.

[0019] In an embodiment, the method further comprises, after the step of obtaining the heat exchange demand state of the target indoor unit:

[0020] The corresponding control valve is controlled to open when the heat exchange demand state meets a second condition.

[0021] The second condition includes that the mode demanded by the target indoor unit is the first mode.

[0022] In an embodiment, the multi-connected air conditioner further comprises at least two refrigerant regulating modules corresponding to the target indoor units, the first pipeline between the outdoor heat exchanger and the throttling device is connected to the first end of the at least two refrigerant regulating modules, the second end of the refrigerant regulating module is connected to the second pipeline between the electronic expansion valve and the control valve in the corresponding target indoor unit, the outdoor unit comprises an outdoor heat exchanger and a throttling device, the outdoor heat exchanger, the throttling device and the target indoor unit are connected in sequence, and after the step of controlling the corresponding control valve to be closed in the case where the heat exchange demand state meets the first condition, the method further comprises:

[0023] controlling the refrigerant regulating module to operate so that the refrigerant in the indoor heat exchanger is discharged to the outdoor heat exchanger.

[0024] In an embodiment, the refrigerant regulating module comprises a multi-way valve, the multi-way valve has the first end, the second end and a third end, the third end of each multi-way valve is connected to the third pipeline between the throttling device and the electronic expansion valve, and the step of controlling the refrigerant regulating module to operate so that the refrigerant in the indoor heat exchanger is discharged to the outdoor heat exchanger comprises:

[0025] controlling the multi-way valve to operate at a first valve position so that the first pipeline and the second pipeline are connected and the second pipeline and the third pipeline are blocked.

[0026] In addition, to achieve the above-mentioned purpose, the present application further provides a multi-connected air conditioner, which comprises a control device, an outdoor unit and at least two indoor units connected to the outdoor unit, one or more of the indoor units is a target indoor unit, the outdoor unit comprises at least two control valves and at least two electronic expansion valves, the control valves, the indoor units and the electronic expansion valves are arranged one by one, the control valves, the indoor units corresponding to the control valves and the electronic expansion valves corresponding to the control valves are connected in sequence, and the electronic expansion valves, the outdoor unit and the indoor units are connected to the control device.

[0027] The control device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the multi-connected air conditioner.

[0028] In addition, to achieve the above-mentioned purpose, the present application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the control method of the multi-connected air conditioner. Advantages

[0029] The one or more technical solutions provided in the application have at least the following technical effects: a control valve is arranged in one or more indoor units of a multi-split air conditioner, during operation of a first mode of the multi-split air conditioner, the refrigerant is directed to the electronic expansion valve from the control valve, and the indoor unit where the control valve is arranged is determined according to a heat exchange demand state, when the indoor unit does not have the first mode, the corresponding control valve is controlled to be closed, so that the refrigerant carrying energy cannot flow into the corresponding indoor unit, which is beneficial to reduce the loss of heat exchange amount in the indoor unit without energy demand, reduce unnecessary heat exchange between the air conditioner and the indoor space, effectively improve the indoor comfort, and reduce the refrigerant noise in the indoor unit without energy demand. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings from these drawings without any creative effort.

[0032] Fig. 1 is a schematic diagram of the system structure of an embodiment of the multi-split air conditioner of the present application;

[0033] Fig. 2 is a schematic diagram of the system structure of another embodiment of the multi-split air conditioner of the present application;

[0034] Fig. 3 is a schematic diagram of the device structure of the hardware operating environment involved in the control method of the multi-split air conditioner in the embodiment of the present application;

[0035] Fig. 4 is a schematic diagram of the flow provided by an embodiment of the control method of the multi-split air conditioner of the present application;

[0036] Fig. 5 is a schematic diagram of the flow provided by another embodiment of the control method of the multi-split air conditioner of the present application;

[0037] Fig. 6 is a schematic diagram of the flow provided by still another embodiment of the control method of the multi-split air conditioner of the present application;

[0038] Fig. 7 is a schematic diagram of the flow provided by still another embodiment of the control method of the multi-split air conditioner of the present application.

[0039] The object implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Embodiments of the present application

[0040] It should be understood that the specific embodiments described herein are merely intended to explain the technical solutions of the present application, and are not used to limit the present application.

[0041] For better understanding of the technical solutions of the present application, the following will be described in detail in combination with the drawings of the specification and specific embodiments.

[0042] The main solution of the embodiment of the present application is: based on a kind of multi-connected air conditioner, a kind of control method is proposed, the multi-connected air conditioner includes outdoor unit and at least two indoor units connected with the outdoor unit, one or more than one indoor unit is target indoor unit, the target indoor unit includes control valve, indoor heat exchanger and electronic expansion valve connected in sequence, the method comprises: control the multi-connected air conditioner runs first mode, obtains the heat exchange demand state of the target indoor unit;In the case where the heat exchange demand state satisfies first condition, the corresponding control valve is controlled to be closed;Wherein, the first condition indicates that the target indoor unit does not have the need of the first mode corresponding to energy, and the refrigerant flow direction in the first mode is directed to the electronic expansion valve by the control valve.

[0043] In an embodiment, for convenience of description, the following is described with the multi-connected air conditioner as the execution subject.

[0044] Because in the prior art, in the process of heating operation of outdoor unit, the electronic expansion valve in indoor unit is located at the outlet side of indoor heat exchanger, whether indoor unit is opened or not, refrigerant will flow through all indoor units, which not only causes system energy loss and generates noise, but also causes the indoor unit without energy need to radiate heat exchange quantity to affect the comfort of the space.

[0045] The present application provides the above-mentioned solution, by heat exchange demand state determination, when the indoor unit with control valve does not have the need of the first mode, the corresponding control valve is controlled to be closed, then the refrigerant carrying energy will not flow into the corresponding indoor unit, which is beneficial to reduce the loss of heat exchange quantity in indoor unit without energy need, reduce unnecessary heat exchange between air conditioner and indoor space, to effectively improve indoor comfort, and can reduce the refrigerant sound in indoor unit without energy need.

[0046] The embodiment of the present application provides a kind of multi-connected air conditioner.

[0047] In an embodiment, referring to FIG. 1 and FIG. 2, the multi-connected air conditioner includes an outdoor unit 1 and at least two indoor units 2 connected with the outdoor unit 1, one or more than one indoor unit 2 is a target indoor unit, the outdoor unit 1 includes a compressor 12, a throttling device 13, an outdoor heat exchanger 16, at least two control valves 11 and at least two electronic expansion valves 15, the control valve 11, the indoor unit 2 and the electronic expansion valve 15 are set one by one, the control valve 11, the indoor unit 2 corresponding to the control valve 11 and the electronic expansion valve 15 corresponding to the control valve 11 are connected in sequence. Indoor unit 2 includes indoor heat exchanger arranged to exchange heat with air in the space.

[0048] The outdoor heat exchanger 16, the throttling device 13, the electronic expansion valve 15, the indoor heat exchanger and the control valve 11 are connected in sequence.

[0049] In an embodiment, the control valve 11 is a on-off valve, for example, a ball valve, which is advantageous to improve the accuracy and efficiency of flow control to improve the reliability of system operation. In other embodiments, the control valve 11 can also be an electronic expansion valve or the like.

[0050] The electronic expansion valve 15 can be used to adjust the flow rate of the refrigerant flowing into the indoor heat exchanger connected thereto.

[0051] In a feasible implementation, the multi-split air conditioner comprises a reversing assembly 14, the exhaust port of the compressor 12, the gas return port of the compressor 12, the outdoor heat exchanger 16 and the control valve 11 are connected with the reversing assembly 14, the reversing assembly 14 has a first operating state and a second operating state, when the reversing assembly 14 operates in the first operating state, the exhaust port of the compressor 12 is communicated with the control valve 11, and the gas return port of the compressor 12 is communicated with the outdoor heat exchanger 16; when the reversing assembly 14 operates in the second operating state, the exhaust port of the compressor 12 is communicated with the outdoor heat exchanger 16, and the gas return port of the compressor 12 is communicated with the control valve 11. Based on this, the multi-split air conditioner can be switched between different operating modes by switching the operating state of the reversing assembly 14.

[0052] The operating modes of the multi-split air conditioner at least include the following two modes:

[0053] In the first mode, the reversing assembly 14 operates in the first operating state, the refrigerant flowing out of the compressor 12 flows through the control valve 11, the indoor heat exchanger, the electronic expansion valve 15, the throttling device 13 and the outdoor heat exchanger 16 in sequence and then returns to the compressor 12, the indoor heat exchanger is in a condensing state, and the outdoor heat exchanger 16 is in an evaporating state. The first mode can be a heating mode or a sterilization mode, etc.

[0054] In the second mode, the reversing assembly 14 operates in the second operating state, the refrigerant flowing out of the compressor 12 flows through the outdoor heat exchanger 16, the throttling device 13, the electronic expansion valve 15, the indoor heat exchanger and the control valve 11 in sequence and then returns to the compressor 12, the indoor heat exchanger is in a condensing state, and the outdoor heat exchanger 16 is in an evaporating state. The second mode can be a cooling mode or a defrosting mode, etc.

[0055] In another feasible implementation, the exhaust port of the compressor 12, the control valve 11, the indoor heat exchanger, the electronic expansion valve 15, the throttling device 13, the outdoor heat exchanger 16 and the gas return port of the compressor 12 are connected in sequence.

[0056] In still another feasible implementation, the exhaust port of the compressor 12, the outdoor heat exchanger 16, the relay device, the electronic expansion valve 15, the indoor heat exchanger, the control valve 11 and the exhaust port of the compressor 12 are connected in sequence.

[0057] In an embodiment, referring to FIG. 2, the multi-split air conditioner further comprises at least two refrigerant regulating modules, each of which corresponds to a target indoor unit 2. The first pipeline between the outdoor heat exchanger 16 and the throttling device 13 is connected to the first end of each of the at least two refrigerant regulating modules. The second end of each of the refrigerant regulating modules is connected to the second pipeline between the electronic expansion valve 15 and the control valve 11 in the corresponding target indoor unit 2.

[0058] In an embodiment, the at least two refrigerant regulating modules are arranged in the outdoor unit 1. In other embodiments, the at least two refrigerant regulating modules are arranged in the indoor unit 2.

[0059] In an embodiment, the pipeline between the target indoor unit and the electronic expansion valve 15 is connected to the second end of the corresponding refrigerant regulating module.

[0060] In a possible implementation, the refrigerant regulating module comprises an electromagnetic valve.

[0061] In another possible implementation, the refrigerant regulating module comprises a multi-way valve, which has the first end, the second end, and a third end. The third end of each of the multi-way valves is connected to a third pipeline between the throttling device 13 and the electronic expansion valve 15. The multi-way valve can comprise a three-way valve or a four-way valve, etc. A capillary tube is arranged between the third end of the multi-way valve and the third pipeline.

[0062] The multi-way valve has a first valve position and a second valve position. When the multi-way valve operates in the first valve position, the first pipeline and the second pipeline are connected, and the second pipeline and the third pipeline are blocked. When the multi-way valve operates in the second valve position, the first pipeline and the second pipeline are blocked, and the second pipeline and the third pipeline are connected.

[0063] In an embodiment, referring to FIG. 3, the multi-split air conditioner further comprises a control device 100. The outdoor unit 1 and the indoor unit 2 are connected to the control device 100. The control device 100 comprises at least one processor 1001, a memory 1002, and a timer 1003, etc. The memory 1002 stores instructions executable by the at least one processor 1001. The instructions are executed by the at least one processor 1001 to enable the at least one processor 1001 to perform the control method of the multi-split air conditioner in the following embodiments.

[0064] The control device 100 in the embodiments of the present application can be a wireless control device or a wired control device. The control device 100 shown in FIG. 3 is merely an example and should not impose any limitation on the functions and use range of the embodiments of the present application. The control device 100 can be an integrated control module or can include at least two separate controllers. The control device 100 can include a wire controller 300 in each indoor space regulated by the heat pump system.

[0065] As shown in FIG. 3, the control device 100 can include a processor 1001 (e.g., a central processing unit or the like) that can perform various appropriate actions and processes according to programs stored in a memory 1002, which can be programs in a read-only memory (ROM) or programs loaded from a storage device into a random access memory (RAM). In the RAM, various programs and data required for the operation of the control device 100 are also stored. The processor 1001, the memory 1002 (ROM and RAM), and the like are connected to each other through a bus. An input / output (I / O) interface is also connected to the bus. Generally, the following systems can be connected to the I / O interface: input devices including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, and the like; output devices including, for example, a liquid crystal display (LCD), a speaker, a vibrator, and the like; storage devices including, for example, a magnetic tape, a hard disk, and the like; and communication devices. The communication devices can allow the control device 100 to perform wireless or wired communication with other devices to exchange data. Although the control device 100 having various hardware is shown in the figure, it should be understood that all the shown hardware is not required to be implemented or possessed, and more or less hardware can be alternatively implemented or possessed.

[0066] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product including a computer program carried on a computer readable medium, the computer program containing program codes for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network through the communication devices or from the memory 1002. When the computer program is executed by the processor 1001, the above-mentioned functions defined in the methods of the embodiments disclosed in the present application are performed.

[0067] The heat pump system provided in the application adopts the control method of the multi-connected air conditioner in the following embodiments, and can reduce energy loss and noise of the multi-connected air conditioner and improve indoor comfort. Compared with the prior art, the heat pump system provided in the application has the same beneficial effects as the control method of the multi-connected air conditioner provided in the following embodiments, and other technical features in the heat pump system are the same as the features disclosed in the method of the following embodiments, which will not be described here.

[0068] It should be understood that parts of the present application can be realized by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0070] It should be noted that the execution subject of the present embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device, a multi-connected air conditioner, etc. capable of realizing the above functions. The present embodiment and the following embodiments will be described below taking the multi-connected air conditioner as an example.

[0071] Based on this, the present embodiment provides a control method of a multi-connected air conditioner. Referring to FIG. 3 and FIG. 4, they are flow diagrams of an embodiment of the control method of the multi-connected air conditioner of the present application.

[0072] In the present embodiment, the control method of the multi-connected air conditioner comprises steps S10-S20:

[0073] Step S10, control the multi-connected air conditioner to run in a first mode, and acquire a heat exchange demand state of the target indoor unit, wherein the flow direction of refrigerant in the first mode is directed by the control valve to the electronic expansion valve;

[0074] In the first mode, the reversing assembly runs in a first running state, the refrigerant flowing out of the compressor flows through the control valve, the indoor heat exchanger, the electronic expansion valve, the throttling device and the outdoor heat exchanger in turn and then flows back to the compressor, the indoor heat exchanger is in a condensing state, and the outdoor heat exchanger is in an evaporating state.

[0075] The heat exchange demand state can include at least one of the following: whether there is a demand, a demand heat exchange mode when there is a demand, a demand energy value, etc.

[0076] The heat exchange demand state can be determined according to a user's instruction or obtained by monitoring the operation state of the target indoor unit.

[0077] The heat exchange demand state of each target indoor unit is obtained when the first mode is started or during the continuous operation of the first mode.

[0078] In an embodiment, the number of target indoor units is less than the total number of indoor units. In other embodiments, all indoor units in the multi-split air conditioner are target indoor units.

[0079] In step S20, if the heat exchange demand state satisfies a first condition, the corresponding control valve is controlled to be closed; wherein the first condition indicates that the target indoor unit does not have the energy demand corresponding to the first mode.

[0080] In an embodiment, the first condition includes that the target indoor unit does not have the energy demand or the target indoor unit demands a second mode of heat exchange; wherein in the second mode, the refrigerant stops flowing or the refrigerant flow direction is pointed to the control valve by the electronic expansion valve.

[0081] The target indoor unit is turned off or the temperature difference between the temperature of the environment where the target indoor unit is located and the set temperature is less than a preset temperature difference, indicating that the target indoor unit does not have the energy demand.

[0082] The second mode here can include a cooling mode or a standby mode. When the indoor unit demands the second mode of heat exchange, the corresponding electronic expansion valve operates at a throttling opening degree, and when the indoor unit demands the standby mode of heat exchange, the corresponding electronic expansion valve operates at a standby opening degree, which is an opening degree greater than 0. In other embodiments, the first condition can also include that the temperature of the indoor heat exchanger is greater than a protection temperature, etc.

[0083] After the control valve is closed, the refrigerant discharged by the compressor will not flow into the corresponding control valve.

[0084] The embodiments of the present application provide a control method of a multi-split air conditioner. During the operation of the multi-split air conditioner in a first mode, the refrigerant is pointed from the control valve to the electronic expansion valve. The indoor unit to which the control valve is set is controlled to be closed when the heat exchange demand state indicates that the indoor unit does not have the energy demand of the first mode. Therefore, the refrigerant carrying energy will not flow into the corresponding indoor unit, which is beneficial to reduce the loss of heat exchange amount in the indoor unit without energy demand, reduce unnecessary heat exchange between the air conditioner and the indoor space, effectively improve the indoor comfort, and reduce the refrigerant noise in the indoor unit without energy demand.

[0085] Further, after step S10, the method further includes: if the heat exchange demand state satisfies a second condition, controlling the corresponding control valve to be opened.

[0086] The second condition includes that the mode required by the target indoor unit is the first mode.

[0087] In an embodiment, the mode in which the air conditioner currently operates is consistent with the mode required by the target indoor unit, the control valve is opened, the heat exchange requirement of the target indoor unit is ensured to be met, and the comfort of the space where the target indoor unit is located is improved.

[0088] Based on any of the above embodiments, in another embodiment of the present application, the same or similar content as the above embodiments can be referred to the above introduction, and will not be described in detail hereinafter. On this basis, please refer to FIG. 5, the step of controlling the corresponding control valve to be closed is executed at the same time or after the step of controlling the corresponding control valve to be closed, further includes:

[0089] Step S30, controlling the corresponding electronic expansion valve of the control valve to be closed.

[0090] In the present embodiment, the control valve and the electronic expansion valve are closed at the same time.

[0091] In an embodiment, the electronic expansion valve and the control valve are closed, which can avoid the energy-carrying refrigerant flowing out of the other indoor units with energy requirement from entering the target indoor unit without energy requirement in the first mode through the electronic expansion valve side, thereby further reducing the loss of system heat exchange capacity and unnecessary heat exchange between the target indoor unit and the space where the target indoor unit is located, and realizing effective improvement of indoor comfort and effective reduction of air conditioner refrigerant sound.

[0092] Based on any of the above embodiments, in another embodiment of the present application, the same or similar content as the above embodiments can be referred to the above introduction, and will not be described in detail hereinafter. On this basis, the control method of the multi-split air conditioner further includes:

[0093] When the multi-split air conditioner currently operates in the second mode and the heat exchange mode required by the target indoor unit is the first mode, the step of controlling the multi-split air conditioner to operate in the first mode to obtain the heat exchange requirement state of the target indoor unit is executed; and / or,

[0094] When the multi-split air conditioner currently operates in the second mode and the heat exchange mode required by the target indoor unit is the second mode, the control valve is opened.

[0095] Here, controlling the multi-split air conditioner to operate in the first mode means controlling the outdoor unit to operate in the first mode, for example, maintaining the reversing assembly to operate in the first operating state or switching the reversing assembly from the second operating state to the first operating state.

[0096] In an embodiment, when the mode of operation of the multi-split air conditioner conflicts with the mode of operation of the target indoor unit, the priority of the first mode is higher than that of the second mode, so that when the outdoor unit operates in the first mode, the control valve corresponding to the target indoor unit requiring the second mode is closed, so as to avoid the target indoor unit requiring the second mode from inputting heat to the space where it is located, thereby effectively improving the comfort of the space; when the current mode of operation of the multi-split air conditioner and the mode of operation of the target indoor unit are both the second mode, the control valve corresponding to the target indoor unit is opened to ensure effective satisfaction of indoor requirements.

[0097] Based on any of the above embodiments, in another embodiment of the present application, the same or similar content as the above embodiments can be referred to the above introduction, and will not be described in detail hereinafter. On this basis, the first mode of operation of the multi-split air conditioner is defined as step S101, and then referring to FIG. 6, after step S101, steps S102 and S103 are further included.

[0098] In step S102, when the multi-split air conditioner meets the defrosting condition, the multi-split air conditioner is controlled to operate in the defrosting mode to defrost the outdoor heat exchanger, and all the control valves are controlled to be opened.

[0099] The defrosting condition specifically refers to the condition required to be met by the environmental parameter of the environment where the outdoor heat exchanger is located and / or the operating parameter of the multi-split air conditioner itself when the outdoor heat exchanger is frosted. For example, the defrosting condition can include that the outdoor environment temperature is less than a first temperature threshold and / or the temperature of the outdoor heat exchanger is less than a second temperature threshold.

[0100] In the defrosting mode, the outdoor heat exchanger is in a heat release state. In an embodiment, the reversing component is switched from the first operating state to the second operating state, so that the outdoor heat exchanger is in a condensing state to release heat and melt the ice and frost on its surface.

[0101] Here, when the multi-split air conditioner meets the defrosting condition, the acquisition of the heat exchange demand state of the indoor unit is stopped, and the system operation control based on the heat exchange demand state of the indoor unit is also stopped.

[0102] In step S103, when the multi-split air conditioner does not meet the defrosting condition, the step of acquiring the heat exchange demand state of the target indoor unit is performed.

[0103] In an embodiment, all the control valves are opened during the defrosting process of the outdoor unit, which is beneficial to improve the oil return amount of the compressor and the circulation amount of the refrigerant, and ensures that sufficient heat is provided for defrosting while improving the system operation reliability.

[0104] Based on any of the above embodiments, in another embodiment of the present application, the same or similar contents as the above embodiments can be referred to the above description, and the subsequent description will not be repeated. On this basis, the multi-split air conditioner further comprises at least two refrigerant adjusting modules, the refrigerant adjusting modules correspond to the target indoor units one by one, the first pipelines between the outdoor heat exchanger and the throttling device are connected to the first ends of the at least two refrigerant adjusting modules, the second ends of the refrigerant adjusting modules are connected to the second pipelines between the electronic expansion valves and the control valves in the corresponding target indoor units, respectively, the outdoor unit comprises an outdoor heat exchanger and a throttling device, the outdoor heat exchanger, the throttling device and the target indoor unit are connected in sequence, referring to FIG. 7, after the step of controlling the corresponding control valve to be closed in the case that the heat exchange demand state meets the first condition, the method further comprises the following steps:

[0105] In step S40, the refrigerant adjusting module is controlled to operate so that the refrigerant in the indoor heat exchanger is discharged to the outdoor heat exchanger.

[0106] In a feasible implementation manner, the refrigerant adjusting module comprises a multi-way valve, the multi-way valve has the first end, the second end and a third end, the third end of each multi-way valve is connected to a third pipeline between the throttling device and the electronic expansion valve, and the step of controlling the refrigerant adjusting module to operate so that the refrigerant in the indoor heat exchanger is discharged to the outdoor heat exchanger comprises: controlling the multi-way valve to operate at a first valve position so that the first pipeline is connected to the second pipeline and the second pipeline is blocked from the third pipeline. When the control valve is opened, the multi-way valve operates at a second valve position so that the first pipeline is blocked from the second pipeline.

[0107] In another implementation manner, the refrigerant adjusting module comprises a solenoid valve, and the step of controlling the refrigerant adjusting module to operate so that the refrigerant in the indoor heat exchanger is discharged to the outdoor heat exchanger comprises: controlling the solenoid valve to be opened. When the control valve is opened, the solenoid valve is closed.

[0108] In an embodiment, by the above-mentioned manner, the refrigerant can be prevented from accumulating in the indoor unit, so as to ensure the refrigerant amount and oil return amount of the multi-split air conditioner heat exchange cycle, and further improve the heat exchange capacity and operation stability of the system.

[0109] It should be noted that the above examples are only used for understanding the present application and do not constitute a limitation on the control method of the multi-split air conditioner of the present application, and more forms of simple transformation based on this technical concept are within the protection scope of the present application.

[0110] The present application provides a computer readable storage medium having computer readable program instructions (i.e. computer programs) stored thereon, the computer readable program instructions being used to execute the control method of the multi-split air conditioner in the above embodiments.

[0111] The computer readable storage medium provided in the present application may, for example, be a U disk, but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In an embodiment, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted in any suitable medium, including but not limited to electrical wires, optical cables, RF (Radio Frequency), and the like, or any suitable combination of the above.

[0112] The above computer readable storage medium can be contained in a multi-split air conditioner; or can exist separately without being assembled into a multi-split air conditioner.

[0113] The above computer readable storage medium carries one or more programs, which, when executed by the multi-split air conditioner, cause the multi-split air conditioner to perform the following processes: controlling the multi-split air conditioner to operate in a first mode, obtaining a heat exchange demand state of the target indoor unit; and in a case where the heat exchange demand state satisfies a first condition, controlling a corresponding control valve to be closed; wherein the first condition indicates that the target indoor unit does not have a need for the first mode corresponding to the electronic expansion valve.

[0114] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0115] The readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e. computer program) for executing the control method of the multi-split air conditioner, and can solve the technical problem of how to reduce energy loss and noise of the multi-split air conditioner and improve indoor comfort. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the control method of the multi-split air conditioner provided by the above-mentioned embodiments, which will not be repeated here.

[0116] The flowcharts and block diagrams in the drawings illustrate the possible architectures, functionality, and operations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks noted in succession can in fact be executed substantially concurrently or in the reverse order, depending on the functionality involved. It will also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by dedicated hardware-based systems that perform the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0117] It should be understood that each part of the present application can be realized by hardware, software, firmware or a combination thereof. The modules described in the embodiments of the present application can be realized by software or hardware. In some cases, the name of the module does not constitute a limitation on the unit itself. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0118] The above only describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control method of a multi VRF air conditioner, wherein, The multi-connected air conditioner comprises an outdoor unit and at least two indoor units connected with the outdoor unit, one or more of the indoor units is a target indoor unit, the outdoor unit comprises at least two control valves and at least two electronic expansion valves, the control valves, the indoor units and the electronic expansion valves are arranged one by one, the control valves, the indoor units corresponding to the control valves and the electronic expansion valves corresponding to the control valves are sequentially connected, and the method comprises: controlling the multi-connected air conditioner to run in a first mode, and acquiring a heat exchange demand state of the target indoor unit; in a case where the heat exchange demand state satisfies a first condition, controlling a corresponding control valve to be closed; wherein the first condition indicates that the target indoor unit does not have a demand for the first mode, and a refrigerant flow direction in the first mode is directed from the control valve to the electronic expansion valve.

2. The method of claim 1, wherein, The first condition includes that the target indoor unit does not have a demand or the target indoor unit demands a second mode for heat exchange; wherein in the second mode, the refrigerant stops flowing or the refrigerant flow direction is directed from the electronic expansion valve to the control valve.

3. The method of claim 1, wherein, The step of controlling the corresponding control valve to be closed is performed simultaneously or after the step of controlling the corresponding control valve to be closed, and further comprising: controlling the electronic expansion valve corresponding to the control valve to be closed.

4. The method of claim 1, wherein, The method further comprises: when the multi-connected air conditioner currently runs in the second mode and the target indoor unit demands the first mode for heat exchange, performing the step of controlling the multi-connected air conditioner to run in the first mode and acquiring the heat exchange demand state of the target indoor unit; and / or when the multi-connected air conditioner currently runs in the second mode and the target indoor unit demands the second mode for heat exchange, controlling the control valve to be opened.

5. The method of claim 1, wherein, After the step of controlling the multi-connected air conditioner to run in the first mode, further comprising: when the multi-connected air conditioner satisfies a defrosting condition, controlling the multi-connected air conditioner to run in a defrosting mode to defrost the outdoor heat exchanger, and controlling all the control valves to be opened; when the multi-connected air conditioner does not satisfy the defrosting condition, performing the step of acquiring the heat exchange demand state of the target indoor unit.

6. The method of claim 1, wherein, After the step of acquiring the heat exchange demand state of the target indoor unit, further comprising: in a case where the heat exchange demand state satisfies a second condition, controlling the corresponding control valve to be opened; the second condition includes that the target indoor unit demands the first mode.

7. The method of any one of claims 1 to 6, wherein, The multi-connected air conditioner further comprises at least two refrigerant regulating modules, the refrigerant regulating modules correspond one by one to the target indoor units, the first pipelines between the outdoor heat exchanger and the throttling device are connected with first ends of the at least two refrigerant regulating modules, second ends of the refrigerant regulating modules are connected with second pipelines between the electronic expansion valves and the control valves in the corresponding target indoor units respectively, the outdoor unit comprises an outdoor heat exchanger and a throttling device, the outdoor heat exchanger, the throttling device and the target indoor units are sequentially connected, and after the step of controlling the corresponding control valve to be closed in a case where the heat exchange demand state satisfies the first condition, further comprising: The refrigerant regulating module is controlled to operate to discharge refrigerant in the indoor heat exchanger to the outdoor heat exchanger.

8. The method of claim 7, wherein, The refrigerant regulating module comprises a multi-way valve, the multi-way valve has the first end, the second end and a third end, the third end of each of the multi-way valves is connected with a third pipeline between the throttling device and the electronic expansion valve, and the step of controlling the refrigerant regulating module to operate to discharge refrigerant in the indoor heat exchanger to the outdoor heat exchanger comprises: The multi-way valve is controlled to operate at a first valve position to connect the first pipeline and the second pipeline and block the second pipeline and the third pipeline.

9. A multi-split air conditioner, wherein, The multi-split air conditioner comprises a control device, an outdoor unit and at least two indoor units connected with the outdoor unit, one or more than one of the indoor units is a target indoor unit, the outdoor unit comprises at least two control valves and at least two electronic expansion valves, the control valves, the indoor units and the electronic expansion valves are arranged one by one, the control valves, the indoor units corresponding to the control valves and the electronic expansion valves corresponding to the control valves are connected in sequence, and the electronic expansion valves, the outdoor unit and the indoor units are connected with the control device. The control device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the multi-split air conditioner according to any one of claims 1 to 8.

10. A storage medium, wherein, The storage medium is a computer readable storage medium, the storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the control method of the multi-split air conditioner according to any one of claims 1 to 8.

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