Control method, device and equipment for multi-split air conditioner and storage medium

Abstract

The invention discloses a control method, device and equipment for a multi-split air conditioner and a storage medium, the air conditioner comprises an outdoor unit and a plurality of indoor units, and the method comprises the steps that a first instruction is obtained; wherein the first instruction is used for controlling a first indoor unit in the multiple indoor units to introduce fresh air; responding to the first instruction, and obtaining a first operation mode of a second indoor unit in the multiple indoor units; the second indoor unit is different from the first indoor unit; and according to the first operation mode, the first indoor unit is controlled to operate in a second operation mode to introduce fresh air.

Description

Technical Field

[0001] The present application relates to, but is not limited to, the field of air conditioning technology, and in particular to a control method, device, equipment and storage medium for a multi-split air conditioner. Background Art

[0002] Currently in the field of multi-split air-conditioning systems, when controlling the operation of a multi-split air conditioner, multiple indoor units in the same refrigerant pipeline can only start the same operating mode. When the outdoor temperature is low, it is easy to cause the refrigerant in the heat exchanger of the indoor unit in the heating standby state to flow poorly, thereby causing refrigerant accumulation. In the long run, it will lead to a reduction or even shortage of refrigerant in the heat exchangers of other indoor units in the same refrigerant pipeline as the indoor unit, resulting in a decrease in the temperature regulation ability of the multi-split air conditioner and affecting the heating effect of the multi-split air conditioner. Summary of the invention

[0003] The present application provides a control method, device, equipment and storage medium for a multi-split air conditioner, which solves the problem in the related art that the control method for a multi-split air conditioner easily causes refrigerant accumulation and affects the heating effect of the multi-split air conditioner.

[0004] The technical solution of this application is implemented as follows:

[0005] A control method for a multi-split air conditioner, the air conditioner comprising an outdoor unit and a plurality of indoor units, the control method comprising:

[0006] Obtaining a first instruction; wherein the first instruction is used to control a first indoor unit among the multiple indoor units to introduce fresh air;

[0007] In response to the first instruction, obtaining a first operating mode of a second indoor unit among the plurality of indoor units; the second indoor unit is different from the first indoor unit;

[0008] According to the first operation mode, the first indoor unit is controlled to operate in the second operation mode to introduce fresh air.

[0009] A control device for a multi-split air conditioner, the air conditioner comprising an outdoor unit and a plurality of indoor units, the control device comprising:

[0010] An acquisition module, used for acquiring a first instruction; wherein the first instruction is used for controlling a first indoor unit among the plurality of indoor units to introduce fresh air;

[0011] a processing module, configured to obtain, in response to the first instruction, a first operating mode of a second indoor unit among the plurality of indoor units; the second indoor unit is different from the first indoor unit;

[0012] A processing module is used to control the first indoor unit to operate in a second operating mode to introduce fresh air according to the first operating mode.

[0013] A control device for a multi-split air conditioner, the control device comprising:

[0014] A memory for storing executable instructions;

[0015] The processor is used to execute the executable instructions stored in the memory to implement the steps of the above-mentioned multi-split air conditioner control method.

[0016] A computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the control method of the multi-split air conditioner.

[0017] The control method, device, equipment and storage medium of a multi-split air conditioner provided in the embodiment of the present application, wherein the air conditioner includes an outdoor unit and multiple indoor units, and the method includes: obtaining a first instruction; wherein the first instruction is used to control the first indoor unit among the multiple indoor units to introduce fresh air; in response to the first instruction, obtaining the first operating mode of the second indoor unit among the multiple indoor units; the second indoor unit is different from the first indoor unit; according to the first operating mode, controlling the first indoor unit to operate in the second operating mode to introduce fresh air. The problem that the control method of the multi-split air conditioner in the related art is prone to cause refrigerant accumulation and affect the heating effect of the multi-split air conditioner is solved. In the present application, when the first instruction is obtained, according to the first operating mode of the second indoor unit among the multiple indoor units, the first indoor unit among the multiple indoor units is flexibly controlled to introduce heated fresh air in the second operating mode, thereby avoiding the accumulation of refrigerant and solving the influence of the refrigerant accumulation on the heating effect of the multi-split air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The process intention of the control method of the multi-split air conditioner provided in the embodiment of the present application;

[0019] Figure 2 A schematic diagram of a control device for a multi-split air conditioner provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of the device provided in the embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of an indoor unit of a multi-split air conditioner provided in an embodiment of the present application;

[0022] Figure 5 A flowchart of a control method in a practical application scenario provided by an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0024] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0025] In the following description, the terms "first\second\third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0027] The embodiment of the present application provides a control method for a multi-split air conditioner, referring to Figure 1 As shown, the method comprises the following steps:

[0028] Step 101: Get a first instruction.

[0029] The first instruction is used to control the first indoor unit among the multiple indoor units to introduce fresh air.

[0030] When a first indoor unit among the multiple indoor units obtains the first instruction, it indicates that the first indoor unit has a demand for introducing fresh air.

[0031] Step 102: In response to the first instruction, obtain a first operating mode of a second indoor unit among the multiple indoor units.

[0032] The second indoor unit is different from the first indoor unit and may be another indoor unit among the plurality of indoor units other than the first indoor unit.

[0033] The first operation mode includes but is not limited to the second heat exchanger of the second indoor unit entering the heating state. When the first indoor unit among the multiple indoor units has a demand for introducing fresh air, the operation state of the heat exchanger of the second indoor unit among the multiple indoor units is first obtained.

[0034] Step 103: According to the first operation mode, control the first indoor unit to operate in the second operation mode to introduce fresh air.

[0035] After obtaining the operating state of the second heat exchanger of the second indoor unit among the multiple indoor units, the first indoor unit is controlled to operate in a second operating mode to introduce fresh air according to the operating state of the second heat exchanger of the second indoor unit. The first operating mode is different from the second operating mode.

[0036] It can be understood that when the first operation mode is that the second heat exchanger of the second indoor unit enters the heating state, the first indoor unit is in the heating standby state. At this time, if the first indoor unit is controlled to directly introduce fresh air according to the fresh air introduction demand of the first indoor unit, a cold cavity is easily formed near the heat exchanger of the first indoor unit, resulting in poor circulation of the refrigerant in the heat exchanger, which in turn causes refrigerant accumulation and affects the heating capacity of the system. Therefore, the first indoor unit is controlled to be adjusted from the operation mode of directly introducing fresh air to the second operation mode to prevent the formation of a cold cavity near the heat exchanger of the first indoor unit due to the direct introduction of fresh air, and to avoid refrigerant accumulation.

[0037] The embodiment of the present application provides a control method for a multi-split air conditioner, the air conditioner includes an outdoor unit and multiple indoor units, the method includes: obtaining a first instruction; wherein the first instruction is used to control the first indoor unit among the multiple indoor units to introduce fresh air; in response to the first instruction, obtaining the first operating mode of the second indoor unit among the multiple indoor units; the second indoor unit is different from the first indoor unit; according to the first operating mode, controlling the first indoor unit to operate in the second operating mode to introduce fresh air. In the present application, when the first instruction is obtained, according to the first operating mode of the second indoor unit, the first indoor unit is controlled to operate in the second operating mode to introduce heated fresh air, so that when the first indoor unit is in the heating standby state, by adjusting the operating mode of the first indoor unit when introducing fresh air, the accumulation of refrigerant is avoided, and the influence of the accumulation of refrigerant on the heating effect of the multi-split air conditioner is solved.

[0038] In some embodiments of the present application, in step 103, according to the first operating mode, controlling the first indoor unit to operate in the second operating mode to introduce fresh air can be achieved by the following steps:

[0039] If the first operating mode is to control the second heat exchanger of the second indoor unit to enter a heating state, control the first indoor unit to introduce fresh air; obtain first associated parameters of multiple indoor units; if the first associated parameters meet the first condition, heat the fresh air introduced by the first indoor unit.

[0040] In the embodiment of the present application, the first associated parameters of the plurality of indoor units include but are not limited to at least one of the following associated parameters of the first indoor unit and the associated parameters of the second indoor unit. Among them, the associated parameters of the first indoor unit include but are not limited to temperature (for example, the temperature of the environment in which the first indoor unit is located) and the duration of introducing fresh air. Among them, the associated parameters of the second indoor unit include but are not limited to temperature (for example, the temperature of the surface of the second heat exchanger of the second indoor unit).

[0041] Among them, obtaining the first associated parameter of the first indoor unit is to detect and record the initial temperature of the environment in which the first indoor unit is located before controlling the first indoor unit to introduce fresh air, and after controlling the first indoor unit to introduce fresh air, periodically detect and record multiple temperatures of the environment in which the first indoor unit is located at preset intervals.

[0042] The first associated parameter of the first indoor unit is obtained by starting the timing after controlling the first indoor unit to introduce fresh air, and periodically detecting and recording multiple durations of the first indoor unit introducing fresh air at preset intervals.

[0043] Among them, obtaining the first associated parameter of the second indoor unit is to detect and record the initial temperature of the second heat exchanger surface of the second indoor unit before controlling the first indoor unit to introduce fresh air, and after controlling the first indoor unit to introduce fresh air, periodically detect and record multiple temperatures of the second heat exchanger surface of the second indoor unit at preset intervals.

[0044] Exemplarily, the preset interval time may be 1 minute, or other constants greater than or equal to 1 second / minute / hour, and may be set according to actual needs, and this application does not impose any limitation on this.

[0045] In some embodiments of the present application, the first association parameter satisfies the first condition, including at least one of the following situations:

[0046] In the first case, when the first associated parameter includes a first temperature in the room before the first indoor unit introduces fresh air and a second temperature in the room after the first indoor unit introduces fresh air, it is determined that the temperature difference between the first temperature and the second temperature is greater than a first threshold.

[0047] The temperature of the environment where the first indoor unit is located may include a first temperature in the room before the first indoor unit introduces fresh air, and a second temperature in the room after the first indoor unit introduces fresh air. When the temperature difference between the first temperature and the second temperature in the room is greater than a first threshold, it is determined that after the first indoor unit introduces fresh air, the temperature reduction value of the environment where the first indoor unit is located exceeds the first threshold.

[0048] Exemplarily, the first threshold may be 2 degrees Celsius, or other values ​​may be set according to actual needs, which is not limited in this application.

[0049] In the second case, when the first associated parameter includes the third temperature of the second heat exchanger of the second indoor unit before the first indoor unit introduces fresh air and the fourth temperature of the second heat exchanger after the first indoor unit introduces fresh air, it is determined that the temperature difference between the third temperature and the fourth temperature is greater than the second threshold.

[0050] The temperature of the second heat exchanger surface of the second indoor unit may include a third temperature of the second heat exchanger surface before the first indoor unit introduces fresh air, and a fourth temperature of the second heat exchanger surface after the first indoor unit introduces fresh air. When the temperature difference between the third temperature and the fourth temperature of the second heat exchanger surface is greater than the second threshold, it is determined that the temperature reduction value of the second heat exchanger surface of the second indoor unit exceeds the second threshold after the first indoor unit introduces fresh air.

[0051] Exemplarily, the second threshold value may be 2 degrees Celsius, or other values ​​may be set according to actual needs, which is not limited in this application.

[0052] In a third case, when the first associated parameter includes a first duration for the first indoor unit to introduce fresh air, it is determined that the first duration is greater than a third threshold.

[0053] When it is determined that the first time duration for the first indoor unit to introduce fresh air is greater than the third threshold, it is determined that after the first indoor unit introduces fresh air, the time duration for the first indoor unit to turn on independent fresh air exceeds the third threshold.

[0054] Exemplarily, the third threshold may be 2 hours, or other values ​​may be set according to actual needs, which is not limited in this application.

[0055] In an embodiment of the present application, when the second heat exchanger of the second indoor unit is in a heating state, the first indoor unit is in a heating standby state, and after the first indoor unit is controlled to turn on independent fresh air, fresh air is introduced through the first indoor unit. The temperature of the environment in which the first indoor unit is located, the duration of the first indoor unit introducing fresh air, and the temperature of the surface of the second heat exchanger of the second indoor unit are obtained, thereby obtaining the first associated parameters of the multiple indoor units. In the first case, it is determined that after the first indoor unit introduces fresh air, the temperature drop value of the environment in which the first indoor unit is located exceeds the first threshold value; in the second case, it is determined that after the first indoor unit introduces fresh air, the temperature drop value of the surface of the second heat exchanger of the second indoor unit exceeds the second threshold value, which indicates that the second heat exchanger of the second indoor unit is at this time; in the third case, it is determined that after the first indoor unit introduces fresh air, the duration of the first indoor unit turning on independent fresh air exceeds the third threshold value. When at least one of the situations occurs, it means that after fresh air has been introduced into the first indoor unit for more than a period of time, a cold cavity is formed near the first heat exchanger of the first indoor unit due to the continuous introduction of fresh air, resulting in poor circulation of refrigerant in the first heat exchanger, and then insufficient refrigerant in the second heat exchanger which is in the same refrigerant pipeline as the first heat exchanger, causing the heating capacity of the second heat exchanger to decrease, and the surface temperature of the evaporator of the second heat exchanger will be significantly reduced. At this time, it is necessary to adjust the operation mode of introducing fresh air into the first indoor unit, and promptly control the first heat exchanger of the first indoor unit to enter the heating state to heat the fresh air introduced by the first indoor unit. In this way, heated fresh air can be introduced into the first indoor unit, so that the temperature in the air duct of the first indoor unit will rise, thereby eliminating the cold cavity formed near the first heat exchanger, and increasing the refrigerant circulation speed in the first heat exchanger, thus avoiding the accumulation of refrigerant, and thereby increasing the amount of refrigerant in the second heat exchanger in the same refrigerant pipeline as the first heat exchanger, thereby improving the heating capacity of the second heat exchanger of the second indoor unit, and solving the influence of refrigerant accumulation on the heating effect of the multi-split air conditioner; in addition, introducing heated fresh air into the room can provide a certain amount of heat to the room, thereby improving the comfort of the room temperature.

[0056] In some embodiments of the present application, if the first associated parameter satisfies the first condition, after the fresh air introduced by the first indoor unit is heated, the following steps may be performed:

[0057] Obtain second associated parameters of the plurality of indoor units; if the second associated parameters satisfy a second condition, control the heat exchanger of the first indoor unit to exit the heating state, and control the first indoor unit to introduce fresh air.

[0058] In the embodiment of the present application, the second associated parameters of the multiple indoor units include but are not limited to at least one of the following associated parameters of the first indoor unit and the associated parameters of the second indoor unit. Among them, the associated parameters of the first indoor unit include but are not limited to temperature (for example, the temperature of the environment in which the first indoor unit is located) and the duration of introducing fresh air. Among them, the associated parameters of the second indoor unit include but are not limited to temperature (for example, the surface temperature of the second heat exchanger of the second indoor unit).

[0059] Among them, obtaining the second associated parameters of multiple indoor units is to detect and record the initial temperature of the environment in which the first indoor unit is located before controlling the first indoor unit to introduce fresh air, and after controlling the first heat exchanger of the first indoor unit to enter the heating state, periodically detect and record multiple temperatures of the environment in which the first indoor unit is located at preset intervals.

[0060] Among them, obtaining the first associated parameter of the first indoor unit is to start the timing after controlling the first heat exchanger of the first indoor unit to enter the heating state, and periodically detect and record multiple durations of heating the fresh air introduced by the first indoor unit at preset intervals.

[0061] Among them, obtaining the first associated parameter of the second indoor unit is to detect and record the initial temperature of the second heat exchanger surface of the second indoor unit before controlling the first indoor unit to introduce fresh air, and after controlling the first heat exchanger of the first indoor unit to enter the heating state, periodically detect and record multiple temperatures of the second heat exchanger surface of the second indoor unit at preset intervals.

[0062] Exemplarily, the preset interval time may be 1 minute, or other constants greater than or equal to 1 second / minute / hour, and may be set according to actual needs, and this application does not impose any limitation on this.

[0063] In some embodiments of the present application, the second association parameter satisfies the second condition, including at least one of the following situations:

[0064] In the first case, when the second associated parameter includes a fifth temperature in the room after the first indoor unit heats the introduced fresh air, it is determined that the temperature difference between the fifth temperature and the first temperature in the room before the first indoor unit introduces the fresh air is less than a fourth threshold.

[0065] The temperature of the environment where the first indoor unit is located may include a first temperature in the room before the first indoor unit introduces fresh air, and a fifth temperature in the room after the first indoor unit introduces heated fresh air. When the temperature difference between the first temperature and the fifth temperature in the room is less than a fourth threshold, it is determined that after the first indoor unit introduces heated fresh air, the increase in the temperature of the environment where the first indoor unit is located exceeds the fourth threshold.

[0066] Exemplarily, the fourth threshold value may be 0 degrees Celsius, or may be other values ​​set according to actual needs, which is not limited in this application.

[0067] In the second case, when the second associated parameter includes the sixth temperature of the second heat exchanger of the second indoor unit after the first indoor unit heats the introduced fresh air, it is determined that the temperature difference between the sixth temperature and the third temperature of the second heat exchanger of the second indoor unit before the first indoor unit introduces fresh air is less than the fifth threshold.

[0068] The temperature of the second heat exchanger surface of the second indoor unit may include the third temperature of the second heat exchanger surface before the first indoor unit introduces fresh air and the sixth temperature of the second heat exchanger surface after the first indoor unit introduces heated fresh air. When the temperature difference between the third temperature and the sixth temperature of the second heat exchanger surface is less than the fifth threshold, it is determined that the temperature increase value of the second heat exchanger surface of the second indoor unit exceeds the fifth threshold after the first indoor unit introduces heated fresh air.

[0069] Exemplarily, the fifth threshold value may be 0 degrees Celsius, or may be other values ​​set according to actual needs, which is not limited in this application.

[0070] Exemplarily, the second situation may be that the second associated parameter includes the temperature of the environment in which the second indoor unit is located after the first indoor unit heats the introduced fresh air, and the temperature difference between the first temperature in the room before the first indoor unit introduces the fresh air is 1 degree Celsius.

[0071] In a third case, when the second associated parameter includes a second time duration for which the first indoor unit heats the introduced fresh air, it is determined that the second time duration is greater than a sixth threshold value.

[0072] When it is determined that the second time length for the first indoor unit to introduce the heated fresh air is greater than the sixth threshold, it is determined that after the first indoor unit introduces the heated fresh air, the time length for the first indoor unit to start heating operation exceeds the sixth threshold.

[0073] Exemplarily, the sixth threshold may be 5 minutes, or may be other values ​​set according to actual needs, which is not limited in this application.

[0074] It can be understood that the first temperature, the second temperature and the fifth temperature are detection values ​​at the same position; the third temperature, the fourth temperature and the sixth temperature are detection values ​​at the same position. The present application can improve the accuracy of detection by detecting the temperature value at the same position, thereby improving the precision of control and reducing detection errors.

[0075] After controlling the first heat exchanger of the first indoor unit to enter the heating state, the temperature of the environment in which the first indoor unit is located, the duration of the first indoor unit introducing the heated fresh air, and the temperature of the second heat exchanger surface of the second indoor unit are obtained, thereby obtaining the second associated parameters of the multiple indoor units. In the first case, it is determined that after the first indoor unit introduces the heated fresh air, the increase in the temperature of the environment in which the first indoor unit is located exceeds the fourth threshold value; in the second case, it is determined that after the first indoor unit introduces the heated fresh air, the increase in the temperature of the second heat exchanger surface of the second indoor unit exceeds the fifth threshold value; in the third case, it is determined that after the first indoor unit introduces the heated fresh air, the duration of the first indoor unit starting the heating operation exceeds the sixth threshold value. When at least one of the situations occurs, it means that after the first indoor unit has introduced heated fresh air for more than a period of time, the temperature in the air duct of the first indoor unit rises due to the introduction of the heated fresh air, thereby eliminating the cold cavity formed near the first heat exchanger and increasing the refrigerant circulation speed in the first heat exchanger, thus avoiding the accumulation of refrigerant, thereby increasing the amount of refrigerant in the second heat exchanger in the same refrigerant pipeline as the first heat exchanger, and improving the heating capacity of the second heat exchanger of the second indoor unit, solving the influence of refrigerant accumulation on the heating effect of the multi-split air conditioner. When the multi-split air conditioner restores the heating effect, the heat exchanger of the first indoor unit can be controlled to exit the heating state, and the first indoor unit can be controlled to start independent fresh air again to continue to introduce fresh air into the room. In this way, while ensuring the reliability of the multi-split air conditioning system, the air quality of the room is guaranteed and the environmental comfort of the room is maintained.

[0076] It can be understood that after the first indoor unit is controlled to start independent fresh air again, the first associated parameters of the multiple indoor units continue to be detected and recorded until the first associated parameters at a certain moment meet the first condition again, and the first heat exchanger of the first indoor unit can be controlled to enter the heating state again. This cycle is repeated to achieve sustainable control and effectively solve the impact of refrigerant accumulation on the heating effect of the multi-split air conditioner.

[0077] In some embodiments of the present application, step 103, according to the first operating mode, controlling the first indoor unit to operate in the second operating mode to introduce fresh air, can also be implemented by the following steps:

[0078] If the first operation mode is to control the second heat exchanger of the second indoor unit not to enter the heating state, the first indoor unit is controlled to introduce fresh air.

[0079] It can be understood that when the first operating mode is that the second heat exchanger of the second indoor unit has not entered the heating state, the first indoor unit is in a non-heating standby state, and the second indoor unit in the multi-split air conditioner has no heating demand. At this time, according to the demand for fresh air introduction of the first indoor unit, the first indoor unit can be controlled to start independent fresh air and directly introduce fresh air.

[0080] A schematic diagram of a control device for a multi-split air conditioner provided in an embodiment of the present application is shown in FIG. Figure 2As shown, the control device 200 of the multi-split air conditioner includes: an acquisition module 201 and a processing module 202, wherein:

[0081] The acquisition module 201 is used to acquire a first instruction; wherein the first instruction is used to control a first indoor unit among multiple indoor units to introduce fresh air.

[0082] The processing module 202 is used to respond to the first instruction and obtain a first operating mode of a second indoor unit among the multiple indoor units; the second indoor unit is different from the first indoor unit.

[0083] The processing module 202 is used to control the first indoor unit to operate in the second operating mode to introduce fresh air according to the first operating mode.

[0084] In some embodiments of the present application, the processing module 202 is used to control the first indoor unit to introduce fresh air if the first operating mode is to control the second heat exchanger of the second indoor unit to enter a heating state; the acquisition module 201 is used to obtain first associated parameters of multiple indoor units; the processing module 202 is used to heat the fresh air introduced by the first indoor unit if the first associated parameters meet the first condition.

[0085] In some embodiments of the present application, the processing module 202 is used to determine that the temperature difference between the first temperature and the second temperature is greater than a first threshold value, and heat the fresh air introduced by the first indoor unit when the first associated parameter includes a first temperature in the room before the first indoor unit introduces fresh air and a second temperature in the room after the first indoor unit introduces fresh air.

[0086] In some embodiments of the present application, the processing module 202 is used to determine that the temperature difference between the third temperature and the fourth temperature is greater than a second threshold value, and heat the fresh air introduced by the first indoor unit, when the first associated parameter includes the third temperature of the second heat exchanger of the second indoor unit before the first indoor unit introduces fresh air and the fourth temperature of the second heat exchanger after the first indoor unit introduces fresh air.

[0087] In some embodiments of the present application, the processing module 202 is used to, when the first associated parameter includes a first duration for the first indoor unit to introduce fresh air, determine that the first duration is greater than a third threshold, and heat the fresh air introduced by the first indoor unit.

[0088] In some embodiments of the present application, the acquisition module 201 is used to obtain second associated parameters of multiple indoor units; the processing module 202 is used to control the heat exchanger of the first indoor unit to exit the heating state and control the first indoor unit to introduce fresh air if the second associated parameters meet the second condition.

[0089] In some embodiments of the present application, the processing module 202 is used to determine that the temperature difference between the fifth temperature and the first temperature of the room before the first indoor unit introduces fresh air is less than a fourth threshold value when the second associated parameter includes the fifth temperature of the room after the first indoor unit heats the introduced fresh air, control the heat exchanger of the first indoor unit to exit the heating state, and control the first indoor unit to introduce fresh air.

[0090] In some embodiments of the present application, the processing module 202 is used to determine that the temperature difference between the sixth temperature and the third temperature of the second heat exchanger of the second indoor unit before the first indoor unit introduces fresh air is less than a fifth threshold value, control the heat exchanger of the first indoor unit to exit the heating state, and control the first indoor unit to introduce fresh air, when the second associated parameter includes the sixth temperature of the second heat exchanger of the second indoor unit after the first indoor unit heats the introduced fresh air.

[0091] In some embodiments of the present application, the processing module 202 is used to determine that the second time period is greater than a sixth threshold value when the second associated parameter includes the second time period for the first indoor unit to heat the introduced fresh air, control the heat exchanger of the first indoor unit to exit the heating state, and control the first indoor unit to introduce fresh air.

[0092] In some embodiments of the present application, the processing module 202 is used to control the first indoor unit to introduce fresh air if the first operating mode is to control the second heat exchanger of the second indoor unit not to enter the heating state.

[0093] In addition, each functional module in this embodiment can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or software functional modules.

[0094] The present application embodiment provides a control device for a multi-split air conditioner, referring to Figure 3 As shown, the control device 300 of the multi-split air conditioner includes: a memory 301 and a processor 302.

[0095] The memory 301 is used to store computer executable instructions that can be run on the processor 302 ; the memory 301 and the processor 302 can be connected via a communication line 303 .

[0096] The processor 302 is used to execute the computer executable instructions stored in the memory 301 to implement the steps of the control method of the multi-split air conditioner provided in the above embodiment, which will not be repeated here.

[0097] Exemplarily, it is taken as an example that the memory 301 and the processor 302 are arranged inside a plurality of indoor units of a multi-split air conditioner, and they may also be arranged according to actual needs.

[0098] A schematic diagram of the structure of an indoor unit of a multi-split air conditioner provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the indoor unit 400 of the multi-split air conditioner includes: a duct unit 401 and a fresh air fan 402.

[0099] The duct machine 401 is provided with a heat exchanger 403, a duct machine fan wheel 404, a duct machine motor 405, an indoor return air port 406, and an indoor air outlet 407; the fresh air fan 402 is provided with a fresh air fan fan wheel 408, a fresh air fan motor 409, a fresh air inlet and return air port 410, and a fresh air outlet 411; wherein the fresh air inlet 410, the fresh air outlet 411 and the indoor air outlet 407 are connected to form a fresh air duct, which is used for outdoor fresh air to be introduced from the fresh air inlet 410 and then discharged from the fresh air outlet 411. 11 flows out, flows through the fresh air duct and is introduced into the room from the indoor air outlet 407; the indoor return air outlet 406 and the indoor air outlet 407 are connected to form a return air duct, which is used for indoor air to be introduced from the indoor return air outlet 406, and discharged into the room from the indoor air outlet 407 after flowing through the return air duct; the fresh air inlet 410 and the indoor return air outlet 406 share the return air duct, which is used for outdoor fresh air to be introduced from the fresh air inlet 410 and indoor air to be introduced from the indoor return air outlet 406 at the same time, and the mixed fresh air is introduced into the room from the indoor air outlet 407 via the return air duct.

[0100] It can be understood that the indoor unit can save installation space by arranging the duct unit and the fresh air fan in the same structure so that the fresh air outlet and the indoor return air outlet share the return air duct. At the same time, since the fresh air introduced from the outside can contact the heat exchanger in the duct unit when flowing through the shared return air duct, the temperature of the introduced fresh air can be adjusted when the fresh air flows through the heat exchanger, making the temperature of the fresh air sent into the room more comfortable.

[0101] Below, take the actual application scenario as an example, see Figure 5 As shown, under winter heating conditions, the control method of the multi-split air conditioner provided by this application is described:

[0102] In this application scenario, the control method steps for implementing the multi-split air conditioner in the embodiment of the present application are as follows: S501, when the No. 1 indoor unit among the multiple indoor units in the multi-split air conditioner receives an independent fresh air start signal, it indicates that the room where the No. 1 indoor unit is located has a fresh air demand. S502, detect the start status of other indoor units among the multiple indoor units in the multi-split air conditioner that share the outdoor unit with the No. 1 indoor unit. S503, if more than one indoor unit among the other indoor units turns on the heating mode, it indicates that there is a room with a heating demand among the other indoor units. At this time, the No. 1 indoor unit is in the heating standby state. If the No. 1 indoor unit is controlled to directly introduce fresh air, it is easy to cause refrigerant accumulation. At this time, the No. 1 indoor unit is controlled to turn on the automatic heating operation mode. S504, detect and record the indoor temperature T1-1 of the No. 1 indoor unit and the evaporator surface temperatures T2-1, T2-2...T2-n of other indoor units. S505, control the No. 1 indoor unit to introduce fresh air. S506, every t minutes (t is a constant, t≥1), re-detect and record the indoor temperature T1-1′ of indoor unit No. 1 and the evaporator surface temperatures T2-1′, T2-2′...T2-n of other indoor units. S507, compare the temperature value detected after the introduction of fresh air with the detection value at the same position as the temperature value before the introduction of fresh air. S508, analyze the comparison results, and when the comparison results meet any of the following entry conditions, control indoor unit No. 1 to automatically turn on the heating mode to heat the fresh air introduced by indoor unit No. 1: Entry condition one, the indoor temperature of indoor unit No. 1 drops by more than 2 degrees; Entry condition two, the evaporator surface temperature of other indoor units with heating demand drops by more than 2 degrees; Entry condition three, indoor unit No. 1 turns on independent fresh air for more than 2 hours. S509, select the corresponding exit condition according to the entry condition, the exit condition priority is: exit condition 1> exit condition 2> exit condition 3: exit condition 1, the indoor temperature of indoor unit 1 returns to the temperature before it is turned on; exit condition 2, the evaporator surface temperature of other indoor units returns to the temperature before it is turned on, or the indoor temperature of other indoor units with heating demand returns to the temperature before it is turned on and is more than 1 degree higher than the temperature before it is turned on; exit condition 3, the automatic heating time of indoor unit 1 exceeds 5 minutes. S510, control indoor unit 1 to exit automatic heating, control indoor unit 1 to introduce fresh air, and return to S506 for detection.

[0103] Among them, when the No. 1 indoor unit receives the independent fresh air start signal, according to the start status of other indoor units, when the first indoor unit is in the heating standby state, the No. 1 indoor unit is controlled to introduce the heated fresh air when the entry conditions are met, thereby increasing the refrigerant circulation speed in the first heat exchanger, avoiding the accumulation of refrigerant, and solving the impact of refrigerant accumulation on the heating effect of the multi-split air conditioner; in addition, the introduction of heated fresh air into the room can provide a certain amount of heat to the room and improve the comfort of the room temperature. Furthermore, when the exit conditions are met, the No. 1 indoor unit is controlled to automatically exit the heating and reintroduce fresh air, which ensures the reliability of the multi-split air conditioning system while ensuring the air quality of the room and maintaining the environmental comfort of the room.

[0104] Further, in S511, if other indoor units are in non-heating mode, that is, the heat exchangers of other indoor units are not turned on in heating mode, it indicates that indoor unit No. 1 is not in heating standby state. At this time, controlling indoor unit No. 1 to turn on fresh air will not cause refrigerant accumulation. In S512, indoor unit No. 1 is controlled to turn on independent fresh air and directly introduce outdoor fresh air, thus ensuring the air quality of the room and maintaining the environmental comfort of the room.

[0105] The embodiment of the present application provides a computer-readable storage medium, which stores one or more programs, and the one or more programs can be executed by one or more processors to implement the following. Figure 1 The implementation process of the control method of the multi-split air conditioner provided in the corresponding embodiment will not be repeated here.

[0106] The above-mentioned computer storage medium / memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory (Flash Memory), a magnetic surface memory, an optical disk, or a compact disc read-only memory (CD-ROM) and the like; it can also be various terminals including one or any combination of the above-mentioned memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0107] It should be understood that the "one embodiment" or "an embodiment" or "an embodiment of the present application" or "the aforementioned embodiment" or "some embodiments" or "some implementation methods" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" or "an embodiment of the present application" or "the aforementioned embodiment" or "some embodiments" or "some implementation methods" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0108] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0109] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0110] In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0111] The methods disclosed in several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0112] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0113] The features disclosed in several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0114] A person skilled in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), magnetic disks or optical disks, etc., various media that can store program codes.

[0115] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or partly embodied in the form of a software product that contributes to the relevant technology. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0116] It is worth noting that the drawings in the embodiments of the present application are only for illustrating the schematic positions of various components on the terminal device and do not represent the actual positions in the terminal device. The actual positions of various components or areas may be changed or offset accordingly according to actual conditions (for example, the structure of the terminal device), and the proportions of different parts of the terminal device in the drawings do not represent the actual proportions.

[0117] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A control method for a multi-split air conditioner, the air conditioner comprising an outdoor unit and a plurality of indoor units, characterized in that: The method comprises: Obtaining a first instruction; wherein the first instruction is used to control a first indoor unit among the multiple indoor units to introduce fresh air; In response to the first instruction, obtaining a first operating mode of a second indoor unit among the plurality of indoor units; the second indoor unit is different from the first indoor unit; According to the first operation mode, the first indoor unit is controlled to operate in the second operation mode to introduce fresh air.

2. The control method according to claim 1, characterized in that: According to the first operation mode, controlling the first indoor unit to operate in the second operation mode to introduce fresh air includes: If the first operation mode is to control the second heat exchanger of the second indoor unit to enter a heating state, the first indoor unit is controlled to introduce fresh air; Acquire first associated parameters of the plurality of indoor units; If the first associated parameter satisfies a first condition, the fresh air introduced by the first indoor unit is heated.

3. The control method according to claim 2, characterized in that: If the first associated parameter satisfies the first condition, after the fresh air introduced by the first indoor unit is heated, the method includes: Acquire second associated parameters of the multiple indoor units; If the second associated parameter satisfies the second condition, the heat exchanger of the first indoor unit is controlled to exit the heating state, and the first indoor unit is controlled to introduce fresh air.

4. The control method according to claim 2, characterized in that: The first association parameter satisfies a first condition, including at least one of the following: In a case where the first associated parameter includes a first temperature in the room before the first indoor unit introduces fresh air and a second temperature in the room after the first indoor unit introduces fresh air, determining that a temperature difference between the first temperature and the second temperature is greater than a first threshold; In a case where the first associated parameter includes a third temperature of the second heat exchanger of the second indoor unit before the first indoor unit introduces fresh air, and a fourth temperature of the second heat exchanger after the first indoor unit introduces fresh air, determining that a temperature difference between the third temperature and the fourth temperature is greater than a second threshold; When the first associated parameter includes a first duration for the first indoor unit to introduce fresh air, it is determined that the first duration is greater than a third threshold.

5. The control method according to claim 3, characterized in that: The second association parameter satisfies a second condition, including at least one of the following: In a case where the second associated parameter includes a fifth temperature of the room after the first indoor unit heats the introduced fresh air, determining that a temperature difference between the fifth temperature and the first temperature of the room before the first indoor unit introduces the fresh air is less than a fourth threshold; In a case where the second associated parameter includes a sixth temperature of the second heat exchanger of the second indoor unit after the first indoor unit heats the introduced fresh air, determining that a temperature difference between the sixth temperature and a third temperature of the second heat exchanger of the second indoor unit before the first indoor unit introduces the fresh air is less than a fifth threshold; When the second associated parameter includes a second time duration for which the first indoor unit heats the introduced fresh air, it is determined that the second time duration is greater than a sixth threshold value.

6. The control method according to claim 4 or 5, characterized in that: The first temperature, the second temperature and the fifth temperature are detection values ​​at the same position; the third temperature, the fourth temperature and the sixth temperature are detection values ​​at the same position.

7. The control method according to claim 1, characterized in that: According to the first operation mode, controlling the first indoor unit to operate in the second operation mode to introduce fresh air includes: If the first operation mode is to control the second heat exchanger of the second indoor unit not to enter the heating state, the first indoor unit is controlled to introduce fresh air.

8. A control device for a multi-split air conditioner, the air conditioner comprising an outdoor unit and a plurality of indoor units, characterized in that: The control device comprises: An acquisition module, used for acquiring a first instruction; wherein the first instruction is used for controlling a first indoor unit among the plurality of indoor units to introduce fresh air; a processing module, configured to obtain, in response to the first instruction, a first operating mode of a second indoor unit among the plurality of indoor units; the second indoor unit is different from the first indoor unit; A processing module is used to control the first indoor unit to operate in a second operating mode to introduce fresh air according to the first operating mode.

9. A control device for a multi-split air conditioner, characterized in that: The control device comprises: A memory for storing executable instructions; A processor is used to execute the executable instructions stored in the memory to implement the control method of the multi-split air conditioner according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: Executable instructions are stored, and when the executable instructions are executed, they are used to cause the processor to execute the control method of the multi-split air conditioner according to any one of claims 1 to 7.

Images