Air conditioner control method and device for multi-connected air conditioner system and air conditioner controller

Abstract

The invention discloses an air conditioner control method and device for a multi-connected air conditioner system and an air conditioner controller, and relates to the technical field of multi-connected air conditioner control, a condenser in the system comprises at least two refrigerant storage areas, and according to the method, in the operation process of the multi-connected air conditioner system, the number of started indoor units is detected; the indoor unit starting proportion is calculated according to the starting number of the indoor units, and the indoor unit starting proportion is the ratio of the starting number of the indoor units to the total number of the indoor units; determining a first refrigerant circulation scheme according to the starting-up proportion of the indoor unit, wherein the first refrigerant circulation scheme comprises the step of determining the number of refrigerant storage areas participating in refrigerant circulation; and the refrigerant storage area is controlled to participate in refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount is matched with the starting number of the indoor units, the refrigerant amount participating in refrigerant circulation can be accurately controlled, and the problem that the refrigerant is excessive when the starting number of the indoor units is small is solved.

Description

Technical Field

[0001] The present application relates to the technical field of multi-split air-conditioning control, and in particular, to an air-conditioning control method, device and air-conditioning controller for a multi-split air-conditioning system. Background Art

[0002] The one-to-many type of air conditioner can save space for installing the external unit and also makes the overall decoration of the room more beautiful, and its usage is gradually increasing.

[0003] In order to adapt to more indoor units, the amount of refrigerant in the multi-split air-conditioning system is increased accordingly, the condenser area is increased, and the capacity of the compressor of the multi-split air-conditioning system is also increased to ensure that when all indoor units are turned on, the multi-split air-conditioning unit can meet the preset capacity requirements.

[0004] When using a one-to-many air conditioner, sometimes only a small number of indoor units or only the smallest indoor unit is turned on. At this time, the cooling output is excessive and it is easy to shut down when the temperature reaches a certain point, causing great inconvenience to users.

[0005] The heat exchange capacity of an entire condenser with the outside world remains unchanged. Only the compressor frequency and the size of the electronic expansion valve are adjusted to distribute the refrigerant. It is no longer possible to accurately control the cold and hot output. The compressor is prone to running at a low load and at a low frequency for a long time, and the capacity is still excessive, resulting in poor overall temperature control effect and poor comfort. In addition, the oil return cannot be met under the low-frequency state, which greatly reduces the user experience. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the present application provides an air conditioning control method, device and air conditioning controller for a multi-connected air conditioning system.

[0007] The technical solution adopted by this application to solve its technical problem is:

[0008] In a first aspect, an air conditioning control method for a multi-connected air conditioning system is provided, wherein a condenser in the system includes at least two refrigerant storage areas, and the method includes:

[0009] During the operation of the multi-connected air conditioning system, detecting the number of indoor units turned on;

[0010] Calculating the proportion of indoor unit startup according to the number of indoor unit startups, wherein the proportion of indoor unit startup is the ratio of the number of indoor unit startups to the total number of indoor units;

[0011] Determining a first refrigerant circulation scheme according to the indoor unit startup ratio, wherein the first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation;

[0012] According to the first refrigerant circulation scheme, the refrigerant storage area is controlled to participate in the refrigerant circulation, so that the refrigerant supply amount and the number of indoor units turned on match each other.

[0013] Furthermore, it also includes: after the multi-split air-conditioning system adopts the first refrigerant circulation scheme to operate for a first specified period of time, calculating the capacity demand of the current indoor unit; determining the maximum cooling capacity of the multi-split air-conditioning system under the current operating environment; calculating the indoor unit demand ratio, the indoor unit demand ratio is the ratio of the current indoor unit capacity demand and the maximum cooling capacity; determining a second refrigerant circulation scheme according to the indoor unit demand ratio, the second refrigerant circulation scheme including determining the number of refrigerant storage areas participating in the refrigerant circulation; controlling the refrigerant storage areas to participate in the circulation according to the second refrigerant circulation scheme, so that the refrigerant supply and the indoor unit refrigerant demand match each other.

[0014] Furthermore, the sizes of the refrigerant storage areas are different, and the first refrigerant circulation scheme further includes determining the numbers of the refrigerant storage areas involved in the refrigerant circulation.

[0015] Furthermore, the condenser includes a first refrigerant storage area, a second refrigerant storage area and a third refrigerant storage area; the first refrigerant circulation scheme and the second refrigerant circulation scheme are used to determine the refrigerant storage area participating in the refrigerant circulation from the first refrigerant storage area, the second refrigerant storage area and the third refrigerant storage area.

[0016] Furthermore, the first refrigerant storage area is provided with a first solenoid valve, the second refrigerant storage area is provided with a second solenoid valve, and the third refrigerant storage area is provided with a third solenoid valve; the first refrigerant circulation scheme is used to control the refrigerant storage area to participate in the refrigerant circulation as follows: the first refrigerant circulation scheme controls whether the refrigerant storage area participates in the refrigerant circulation by controlling the opening and closing of the first solenoid valve, the second solenoid valve, and the second solenoid valve; the second refrigerant circulation scheme is used to control the refrigerant storage area to participate in the circulation as follows: the second refrigerant circulation scheme controls whether the refrigerant storage area participates in the refrigerant circulation by controlling the opening and closing of the first solenoid valve, the second solenoid valve, and the second solenoid valve.

[0017] Furthermore, determining the first refrigerant circulation scheme based on the indoor unit power-on ratio includes: if the indoor unit power-on ratio is less than a first preset value, the first refrigerant circulation scheme determines that the smallest refrigerant storage area participates in the refrigerant circulation; if the indoor unit power-on ratio is less than 50 and greater than 30, the first refrigerant circulation scheme determines that two refrigerant storage areas participate in the refrigerant circulation; if the indoor unit power-on ratio is greater than 50, the first refrigerant circulation scheme determines that three refrigerant storage areas participate in the refrigerant circulation.

[0018] Furthermore, determining the second refrigerant circulation plan based on the indoor unit demand ratio includes: if the indoor unit demand ratio is less than 20%, then the second refrigerant circulation plan determines that the smallest refrigerant storage area participates in the refrigerant circulation; if the indoor unit demand ratio is less than 50% and greater than or equal to 20%, then the second refrigerant circulation plan determines that two refrigerant storage areas participate in the refrigerant circulation; if the indoor unit demand ratio is greater than or equal to 50%, then the second refrigerant circulation plan determines that three refrigerant storage areas participate in the refrigerant circulation.

[0019] Further, detecting the number of indoor units turned on includes: after the turn-on time of the multi-connected air-conditioning system reaches a second specified time period, detecting the number of indoor units turned on.

[0020] Furthermore, the number and size of the refrigerant storage area are determined according to the size of the condenser.

[0021] In a second aspect, an air conditioning control device for a multi-connected air conditioning system is provided, wherein a condenser in the system includes at least two refrigerant storage areas, and the device includes:

[0022] A startup number detection module, used to detect the startup number of indoor units during the operation of the multi-connected air-conditioning system;

[0023] A power-on ratio determination module, used to calculate the power-on ratio of the indoor units according to the number of powered-on indoor units, where the power-on ratio of the indoor units is the ratio of the number of powered-on indoor units to the total number of indoor units;

[0024] A first refrigerant circulation scheme determining module, configured to determine a first refrigerant circulation scheme according to the indoor unit startup ratio, wherein the first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation;

[0025] The refrigerant circulation control module is used to control the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount and the number of indoor units turned on match each other.

[0026] In a third aspect, an air conditioning controller for a multi-connected air conditioning system is provided, comprising:

[0027] at least one processor and at least one memory;

[0028] The memory stores executable instructions of the processor;

[0029] The processor is configured to execute any one of the above-mentioned air-conditioning control methods for a multi-split air-conditioning system.

[0030] The technical solution of the present application provides an air-conditioning control method, device and air-conditioning controller for a multi-split air-conditioning system, in which a condenser includes at least two refrigerant storage areas. During the operation of the multi-split air-conditioning system, the method determines a first refrigerant circulation scheme according to the startup ratio of the indoor units, and the first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; and controlling the refrigerant storage areas to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply and the number of indoor units started up match each other, and the amount of refrigerant participating in the refrigerant circulation can be accurately controlled to avoid the problem of excess refrigerant when the number of indoor units started up is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a flowchart of an air conditioning control method for a multi-connected air conditioning system provided in an embodiment of the present application;

[0033] Figure 2 is a flow chart of another air conditioning control method for a multi-connected air conditioning system provided in an embodiment of the present application;

[0034] Figure 3 , Figure 4 yes Figure 2 A schematic diagram of the refrigerant circulation structure in the embodiment shown;

[0035] Figure 5 yes Figure 2 Schematic diagram of a specific embodiment of an air conditioning control method for a multi-connected air conditioning system in the embodiment shown

[0036] Figure 6 is a functional structure diagram of an air conditioning control device for a multi-connected air conditioning system provided in an embodiment of the present application;

[0037] Figure 7 is a functional structure diagram of another air conditioning control device for a multi-connected air conditioning system provided in an embodiment of the present application;

[0038] Figure 8 It is a functional structure diagram of an air-conditioning controller for a multi-connected air-conditioning system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application is described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0040] To solve the above problems, refer to Figure 1 The embodiment of the present application provides an air conditioning control method for a multi-connected air conditioning system, wherein a condenser in the system includes at least two refrigerant storage areas, and the method includes:

[0041] 101. During the operation of the multi-split air-conditioning system, check the number of indoor units that are turned on.

[0042] 102. Calculate the indoor unit power-on ratio based on the number of indoor units powered on. The indoor unit power-on ratio is the ratio of the number of indoor units powered on to the total number of indoor units.

[0043] 103. Determine a first refrigerant circulation plan according to the indoor unit startup ratio, where the first refrigerant circulation plan includes determining the number of refrigerant storage areas involved in the refrigerant circulation.

[0044] 104. Control the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount and the number of indoor units turned on match each other.

[0045] The air conditioning control method for a multi-split air conditioning system provided in the present embodiment determines a first refrigerant circulation scheme according to the startup ratio of indoor units during the operation of the multi-split air conditioning system. The first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation, and controlling the refrigerant storage areas to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount and the number of indoor units started up match each other. The amount of refrigerant participating in the refrigerant circulation can be accurately controlled to avoid the problem of excess refrigerant when the number of indoor units started up is small.

[0046] As an improvement of the above-mentioned embodiment, an embodiment of the present invention provides another air conditioning control method for a multi-split air conditioning system. The method calculates the total capacity output at the ambient temperature according to the number of indoor units turned on and the load of the indoor units, automatically selects the refrigerant storage area to participate in the refrigerant circulation control, and makes intelligent judgments. By designing multiple parameter thresholds, a more reasonable condenser flow path is selected under complex operating conditions to ensure the heat exchange of the unit, improve the reliability of the unit and achieve energy saving. It solves the problem that when the frequency is low and the target capacity is low, the air conditioner runs at the lowest frequency but still starts and stops frequently near the set temperature point, resulting in excess cooling capacity, thereby improving the user's comfort. It also solves the problem of difficult oil return under low-frequency conditions, making the refrigerant evaporate more evenly, improving the utilization rate of the refrigerant and the utilization rate of the heat exchanger. The condenser in the multi-split air conditioning system includes at least two refrigerant storage areas, see Figure 2 , the method comprising:

[0047] 201. After the multi-split air conditioning system is turned on for a second specified period of time, the number of indoor units turned on is detected.

[0048] 202. The indoor unit power-on ratio is calculated based on the number of indoor units powered on. The indoor unit power-on ratio is the ratio of the number of indoor units powered on to the total number of indoor units.

[0049] 203. Determine a first refrigerant circulation plan according to the indoor unit startup ratio, where the first refrigerant circulation plan includes determining the number of refrigerant storage areas participating in the refrigerant circulation.

[0050] In some optional embodiments, the sizes of the refrigerant storage areas are different, and the first refrigerant circulation scheme further includes determining the numbers of the refrigerant storage areas involved in the refrigerant circulation.

[0051] Specifically, determining the first refrigerant circulation scheme according to the indoor unit startup ratio includes:

[0052] If the proportion of indoor unit startup is less than the first preset value, the first refrigerant circulation scheme determines that the smallest refrigerant storage area participates in the refrigerant circulation.

[0053] If the proportion of indoor unit startup is less than 50 and greater than 30, the first refrigerant circulation scheme determines that two refrigerant storage areas participate in the refrigerant circulation.

[0054] If the proportion of indoor unit startup is greater than 50, the first refrigerant circulation scheme determines that three refrigerant storage areas participate in the refrigerant circulation.

[0055] 204. Control the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount and the number of indoor unit startups match each other.

[0056] 205. After the multi-split air conditioning system operates for a first specified time period using a first refrigerant circulation scheme, calculate the capacity requirement of the current indoor unit.

[0057] 206. Determine the maximum cooling capacity of the multi-split air conditioning system under the current operating environment.

[0058] 207. Calculate the indoor unit demand ratio, which is the ratio of the current indoor unit capacity demand to the maximum cooling capacity.

[0059] 208. Determine a second refrigerant circulation plan according to the indoor unit demand ratio, where the second refrigerant circulation plan includes determining the number of refrigerant storage areas participating in the refrigerant circulation.

[0060] In some alternative embodiments, see Figure 3 and Figure 4 The condenser includes a first refrigerant storage area, a second refrigerant storage area and a third refrigerant storage area.

[0061] In some optional embodiments, the first refrigerant circulation scheme and the second refrigerant circulation scheme are used to determine the refrigerant storage area participating in the refrigerant circulation from the first refrigerant storage area, the second refrigerant storage area, and the third refrigerant storage area.

[0062] In some optional embodiments, a first solenoid valve is provided in the first refrigerant storage area, a second solenoid valve is provided in the second refrigerant storage area, and a third solenoid valve is provided in the third refrigerant storage area.

[0063] In some optional embodiments, controlling the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme is: the first refrigerant circulation scheme controls whether the refrigerant storage area participates in the refrigerant circulation by controlling the opening and closing of the first solenoid valve, the second solenoid valve, and the second solenoid valve. Controlling the refrigerant storage area to participate in the circulation according to the second refrigerant circulation scheme is: the second refrigerant circulation scheme controls whether the refrigerant storage area participates in the refrigerant circulation by controlling the opening and closing of the first solenoid valve, the second solenoid valve, and the second solenoid valve.

[0064] It should be noted that after executing 208, the multi-split air-conditioning system runs for a period of time, such as 4 hours, and then executes 205 again. In this way, the refrigerant circulation is continuously adjusted according to the environmental conditions and the air-conditioning operation conditions, so that the multi-split air-conditioning system maintains the optimal operating state.

[0065] The air conditioning control method provided in this embodiment makes the unit's refrigeration capacity close to the target demand through a variety of adjustment methods, avoids frequent start and stop of the unit, excess cooling output, and compressor operation stability, and improves the unit's reliability.

[0066] Determining the second refrigerant circulation scheme based on the indoor unit demand ratio includes:

[0067] If the indoor unit demand ratio is less than 20%, the second refrigerant circulation plan determines that the smallest refrigerant storage area participates in the refrigerant circulation.

[0068] If the indoor unit demand ratio is less than 50% and greater than or equal to 20%, the second refrigerant circulation scheme determines that two refrigerant storage areas participate in the refrigerant circulation.

[0069] If the indoor unit demand ratio is greater than or equal to 50%, the second refrigerant circulation plan determines that three refrigerant storage areas participate in the refrigerant circulation.

[0070] 209. Control the refrigerant storage area to participate in the circulation according to the second refrigerant circulation scheme, so that the refrigerant supply and the refrigerant demand of the indoor unit match each other.

[0071] In some optional embodiments, the number and size of the refrigerant storage area is determined according to the size of the condenser. The number of refrigerant storage areas is not limited to being divided into three areas, and may be two, three, or more, depending on the actual working conditions of the multi-connected air conditioning system. The position of each refrigerant storage area is not limited in the embodiment of the present invention, and can be set by those skilled in the art according to actual engineering needs.

[0072] In response to the above-mentioned air-conditioning control method for a multi-split air-conditioning system, a specific embodiment is provided below. This embodiment proposes an air-conditioning control method that can automatically select the refrigerant storage area of ​​the air-conditioning outdoor unit. The method performs intelligent state judgment based on the actual refrigeration needs of the unit operation, and selects a more reasonable condenser flow path under complex operating conditions through a method of coupling multiple parameter intervals. While ensuring the heat exchange demand, the unit operation reliability is improved, while achieving energy saving and compressor operation reliability.

[0073] When the refrigeration is just started, the size of the outdoor unit condenser utilization area is determined by the number of indoor units turned on. After the start-up program is completed, the flow control of the refrigerant circulation in the condenser system is automatically performed based on the comparison between the target cooling demand and the total capacity demand.

[0074] See also Figure 5 , the specific control methods are as follows:

[0075] (1) Start the machine and run it for 30 minutes according to normal logic.

[0076] (2) Check whether the proportion of the number of indoor units turned on to the total number of indoor units is less than 30%. If so, open solenoid valve 1, close solenoid valves 2 and 3, and control according to the conventional control method. If so, execute (3).

[0077] (3) Check whether the proportion of the number of opened indoor units to the total number of indoor units is less than 50%. If so, open solenoid valves 1 and 2, close solenoid valve 3, and control according to the conventional control method. If so, execute (4).

[0078] (4) Open solenoid valves 1, 2, and 3 and control them according to conventional control methods.

[0079] (5) Whether the solenoid valve can operate for 1 hour.

[0080] (6) Recalculate the internal machine capacity requirement q.

[0081] (7) Calculate the maximum cooling capacity under the current environment: Q = k(azt), where k is the compressor cooling coefficient; a is the cooling capacity of a single compressor; z is the ambient temperature correction coefficient; and t is the ambient temperature.

[0082] (8) Determine whether q / Q is less than 20%. If so, open solenoid valve 1, close solenoid valves 2 and 3, and control in the conventional manner. After stable operation for 4 hours, return to (6).

[0083] (9) Determine whether q / Q is less than 50%. If so, open solenoid valves 1 and 2, close solenoid valve 3, and control in the conventional manner. After stable operation for 4 hours, return to (6).

[0084] (10) Determine that q / Q is greater than 50%, open solenoid valves 1, 2, and 3, and control them in the conventional manner. After stable operation for 4 hours, return to (6).

[0085] It should be noted that the various data involved in the embodiment of the present invention, including the startup ratio and the indoor unit demand ratio, are not limited in the embodiment of the present invention, and their specific values ​​can be determined by those skilled in the art according to actual engineering needs.

[0086] The air conditioning control method for a multi-split air conditioning system provided in the present embodiment determines a first refrigerant circulation scheme according to the startup ratio of indoor units during operation of the multi-split air conditioning system, the first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; and controls the refrigerant storage areas to participate in the refrigerant circulation according to the first refrigerant circulation scheme. After the multi-split air conditioning system operates for a first specified period of time using the first refrigerant circulation scheme, a second refrigerant circulation scheme is determined according to the indoor unit demand ratio, the second refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; and controls the refrigerant storage areas to participate in the circulation according to the second refrigerant circulation scheme, so that the refrigerant supply and the refrigerant demand of the indoor units match each other, and the amount of refrigerant participating in the refrigerant circulation can be accurately controlled to avoid the problem of excess refrigerant when the number of indoor units started is small.

[0087] In order to cooperate with the implementation of the above-mentioned air conditioning control method for a multi-connected air conditioning system, an embodiment of the present invention provides an air conditioning control device for a multi-connected air conditioning system. Figure 6 , the condenser in the system includes at least two refrigerant storage areas, and the device includes:

[0088] The power-on quantity detection module 61 is used to detect the power-on quantity of indoor units during the operation of the multi-connected air-conditioning system.

[0089] The power-on ratio determination module 62 is used to calculate the power-on ratio of the indoor units according to the power-on number of the indoor units. The power-on ratio of the indoor units is the ratio of the power-on number of the indoor units to the total number of indoor units.

[0090] The first refrigerant circulation scheme determining module 63 is used to determine the first refrigerant circulation scheme according to the indoor unit startup ratio. The first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation.

[0091] The refrigerant circulation control module 64 is used to control the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount and the number of indoor units turned on match each other.

[0092] The air conditioning control device for a multi-split air conditioning system provided in the present embodiment determines a first refrigerant circulation scheme according to the startup ratio of indoor units during the operation of the multi-split air conditioning system, and the first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; and controlling the refrigerant storage areas to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount and the number of indoor units started up match each other, and the amount of refrigerant participating in the refrigerant circulation can be accurately controlled to avoid the problem of excess refrigerant when the number of indoor units started up is small.

[0093] As an improvement of the above embodiment, the present invention provides another air conditioning control device for a multi-connected air conditioning system. Figure 7 , the condenser in the system includes at least two refrigerant storage areas, and the device includes:

[0094] The power-on quantity detection module 71 is used to detect the power-on quantity of indoor units during the operation of the multi-split air-conditioning system. Specifically, after the power-on time of the multi-split air-conditioning system reaches a second specified time, the power-on quantity of indoor units is detected.

[0095] The power-on ratio determination module 72 is used to calculate the power-on ratio of the indoor units according to the power-on number of the indoor units. The power-on ratio of the indoor units is the ratio of the power-on number of the indoor units to the total number of indoor units.

[0096] The first refrigerant circulation scheme determining module 73 is used to determine the first refrigerant circulation scheme according to the indoor unit startup ratio. The first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation.

[0097] The refrigerant circulation control module 74 is used to control the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount and the number of indoor units turned on match each other.

[0098] The refrigerant circulation re-control module 75 is used to calculate the capacity demand of the current indoor unit after the multi-split air-conditioning system adopts the first refrigerant circulation scheme to run for a first specified period of time; determine the maximum cooling capacity of the multi-split air-conditioning system under the current operating environment; calculate the indoor unit demand ratio, which is the ratio of the current indoor unit capacity demand and the maximum cooling capacity; determine the second refrigerant circulation scheme according to the indoor unit demand ratio, the second refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; control the refrigerant storage areas to participate in the circulation according to the second refrigerant circulation scheme, so that the refrigerant supply and the indoor unit refrigerant demand match each other.

[0099] In some optional embodiments, the sizes of the refrigerant storage areas are different, and the first refrigerant circulation scheme further includes determining the numbers of the refrigerant storage areas involved in the refrigerant circulation.

[0100] In some optional embodiments, the condenser includes a first refrigerant storage area, a second refrigerant storage area, and a third refrigerant storage area; the first refrigerant circulation scheme and the second refrigerant circulation scheme are used to determine the refrigerant storage area participating in the refrigerant circulation from the first refrigerant storage area, the second refrigerant storage area, and the third refrigerant storage area.

[0101] In some optional embodiments, a first solenoid valve is set in the first refrigerant storage area, a second solenoid valve is set in the second refrigerant storage area, and a third solenoid valve is set in the third refrigerant storage area; controlling the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme is as follows: the first refrigerant circulation scheme controls whether the refrigerant storage area participates in the refrigerant circulation by controlling the opening and closing of the first solenoid valve, the second solenoid valve, and the second solenoid valve; controlling the refrigerant storage area to participate in the circulation according to the second refrigerant circulation scheme is as follows: the second refrigerant circulation scheme controls whether the refrigerant storage area participates in the refrigerant circulation by controlling the opening and closing of the first solenoid valve, the second solenoid valve, and the second solenoid valve.

[0102] In some optional embodiments, the first refrigerant circulation scheme determining module 73 determines the first refrigerant circulation scheme according to the indoor unit startup ratio, including:

[0103] If the proportion of indoor unit startup is less than the first preset value, the first refrigerant circulation scheme determines that the smallest refrigerant storage area participates in the refrigerant circulation.

[0104] If the proportion of indoor unit startup is less than 50 and greater than 30, the first refrigerant circulation scheme determines that two refrigerant storage areas participate in the refrigerant circulation.

[0105] If the proportion of indoor unit startup is greater than 50, the first refrigerant circulation scheme determines that three refrigerant storage areas participate in the refrigerant circulation.

[0106] In some optional embodiments, the refrigerant circulation re-control module 75 determines the second refrigerant circulation scheme according to the indoor unit demand ratio, including:

[0107] If the indoor unit demand ratio is less than 20%, the second refrigerant circulation plan determines that the smallest refrigerant storage area participates in the refrigerant circulation.

[0108] If the indoor unit demand ratio is less than 50% and greater than or equal to 20%, the second refrigerant circulation scheme determines that two refrigerant storage areas participate in the refrigerant circulation.

[0109] If the indoor unit demand ratio is greater than or equal to 50%, the second refrigerant circulation plan determines that three refrigerant storage areas participate in the refrigerant circulation.

[0110] In some optional embodiments, the number and size of the refrigerant storage area are determined according to the size of the condenser.

[0111] The air-conditioning control device for a multi-split air-conditioning system provided in the present embodiment, the first refrigerant circulation scheme determining module determines the first refrigerant circulation scheme according to the indoor unit startup ratio during the operation of the multi-split air-conditioning system, the first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; and controlling the refrigerant storage areas to participate in the refrigerant circulation according to the first refrigerant circulation scheme, the refrigerant circulation re-control module determines the second refrigerant circulation scheme according to the indoor unit demand ratio after the multi-split air-conditioning system adopts the first refrigerant circulation scheme to operate for a first specified period of time, the second refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; and controlling the refrigerant storage areas to participate in the circulation according to the second refrigerant circulation scheme, so that the refrigerant supply and the indoor unit refrigerant demand match each other, and the amount of refrigerant participating in the refrigerant circulation can be accurately controlled to avoid the problem of excess refrigerant when the number of indoor units started is small.

[0112] Based on the same inventive concept, Figure 8 As shown, the present application also provides an air-conditioning controller for a multi-connected air-conditioning system, comprising:

[0113] at least one processor 81 and at least one memory 82;

[0114] The memory stores executable instructions for the processor;

[0115] The processor is configured to execute the air conditioning control method for a multi-split air conditioning system provided in the above embodiment.

[0116] The air-conditioning controller for a multi-split air-conditioning system provided in the embodiment of the present application stores executable instructions of a processor in a memory. When the executable instructions are executed, the processor can determine a first refrigerant circulation scheme according to the startup ratio of indoor units during the operation of the multi-split air-conditioning system. The first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; and controlling the refrigerant storage areas to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply and the number of indoor units started up match each other. The amount of refrigerant participating in the refrigerant circulation can be accurately controlled to avoid the problem of excess refrigerant when the number of indoor units started up is small.

[0117] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0118] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

Claims

1. An air conditioning control method for a multi-connected air conditioning system, characterized in that: In the system, the condenser includes at least two refrigerant storage areas, and the method includes: During the operation of the multi-connected air conditioning system, detecting the number of indoor units turned on; Calculating the proportion of indoor unit startup according to the number of indoor unit startups, wherein the proportion of indoor unit startup is the ratio of the number of indoor unit startups to the total number of indoor units; Determining a first refrigerant circulation scheme according to the indoor unit startup ratio, wherein the first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; According to the first refrigerant circulation scheme, the refrigerant storage area is controlled to participate in the refrigerant circulation, so that the refrigerant supply amount and the number of indoor units turned on match each other.

2. The method according to claim 1, characterized in that: Also includes: After the multi-connected air-conditioning system operates for a first specified period of time using the first refrigerant circulation scheme, calculating the capacity requirement of the current indoor unit; Determining the maximum cooling capacity of the multi-connected air conditioning system under the current operating environment; Calculating an indoor unit demand ratio, where the indoor unit demand ratio is a ratio of a current indoor unit capacity demand to the maximum cooling capacity; Determining a second refrigerant circulation scheme according to the indoor unit demand ratio, wherein the second refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; According to the second refrigerant circulation scheme, the refrigerant storage area is controlled to participate in the circulation so that the refrigerant supply amount and the refrigerant demand amount of the indoor unit match each other.

3. The method according to claim 2, characterized in that: The sizes of the refrigerant storage areas are different, and the first refrigerant circulation scheme further includes determining the numbers of the refrigerant storage areas involved in the refrigerant circulation.

4. The method according to claim 3, characterized in that: The condenser includes a first refrigerant storage area, a second refrigerant storage area, and a third refrigerant storage area; The first refrigerant circulation scheme and the second refrigerant circulation scheme are used to determine a refrigerant storage area participating in refrigerant circulation from among the first refrigerant storage area, the second refrigerant storage area, and the third refrigerant storage area.

5. The method according to claim 4, characterized in that: The first refrigerant storage area is provided with a first solenoid valve, the second refrigerant storage area is provided with a second solenoid valve, and the third refrigerant storage area is provided with a third solenoid valve; Controlling the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme is as follows: the first refrigerant circulation scheme controls whether the refrigerant storage area participates in the refrigerant circulation by controlling the opening and closing of the first solenoid valve, the second solenoid valve and the second solenoid valve; Controlling the refrigerant storage area to participate in the circulation according to the second refrigerant circulation scheme is as follows: the second refrigerant circulation scheme controls whether the refrigerant storage area participates in the refrigerant circulation by controlling the opening and closing of the first solenoid valve, the second solenoid valve and the second solenoid valve.

6. The method according to claim 5, characterized in that: Determining the first refrigerant circulation scheme according to the indoor unit startup ratio includes: If the indoor unit startup ratio is less than a first preset value, the first refrigerant circulation scheme determines that the smallest refrigerant storage area participates in the refrigerant circulation; If the indoor unit startup ratio is less than 50 and greater than 30, the first refrigerant circulation scheme determines that two refrigerant storage areas participate in the refrigerant circulation; If the indoor unit startup ratio is greater than 50, the first refrigerant circulation scheme determines that three refrigerant storage areas participate in the refrigerant circulation.

7. The method according to claim 6, characterized in that: Determining the second refrigerant circulation scheme according to the indoor unit demand ratio includes: If the indoor unit demand ratio is less than 20%, the second refrigerant circulation scheme determines that the smallest refrigerant storage area participates in the refrigerant circulation; If the indoor unit demand ratio is less than 50% and greater than or equal to 20%, the second refrigerant circulation scheme determines that two refrigerant storage areas participate in the refrigerant circulation; If the indoor unit demand ratio is greater than or equal to 50%, the second refrigerant circulation scheme determines that three refrigerant storage areas participate in the refrigerant circulation.

8. The method according to claim 1, characterized in that: Detecting the number of indoor units turned on includes: after the turn-on time of the multi-connected air-conditioning system reaches a second specified time period, detecting the number of indoor units turned on.

9. The method according to claim 1, characterized in that: The number and size of the refrigerant storage area are determined according to the size of the condenser.

10. An air conditioning control device for a multi-connected air conditioning system, characterized in that: The condenser in the system includes at least two refrigerant storage areas, and the device includes: A startup number detection module, used to detect the startup number of indoor units during the operation of the multi-connected air-conditioning system; A power-on ratio determination module, used to calculate the power-on ratio of the indoor units according to the number of powered-on indoor units, where the power-on ratio of the indoor units is the ratio of the number of powered-on indoor units to the total number of indoor units; A first refrigerant circulation scheme determining module, configured to determine a first refrigerant circulation scheme according to the indoor unit startup ratio, wherein the first refrigerant circulation scheme includes determining the number of refrigerant storage areas participating in the refrigerant circulation; The refrigerant circulation control module is used to control the refrigerant storage area to participate in the refrigerant circulation according to the first refrigerant circulation scheme, so that the refrigerant supply amount and the number of indoor units turned on match each other.

11. An air conditioning controller for a multi-connected air conditioning system, characterized in that: include: at least one processor and at least one memory; The memory stores executable instructions of the processor; The processor is configured to execute the air conditioning control method for a multi-connected air conditioning system according to any one of claims 1 to 9.

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