CN107576108B - Multi-split air conditioner control method - Google Patents
Multi-split air conditioner control method Download PDFInfo
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Abstract
The invention discloses a multi-split air conditioner control method, which comprises the steps of acquiring the number N of shutdown indoor units; if N =1, controlling the expansion valve of the shutdown indoor unit to open and close at intervals for a first set time in each control period; if N is more than 1 and less than or equal to a first set value, controlling the expansion valves of N shutdown indoor units to be opened for a second set time in a circulating mode in sequence in each control period, and only one expansion valve of one shutdown indoor unit is opened at the same time; if N is larger than a first set value, circularly selecting a set number of expansion valves of the shutdown indoor units as a group to open for a third set time, and only opening the selected group of expansion valves of the shutdown indoor units at the same time; the set number is less than N, and the opening degree when the expansion valve is opened is the set opening degree. Therefore, the control method of the invention shortens the opening time of the expansion valve of each shutdown indoor unit, further shortens the duration time of the noise of the refrigerant of each shutdown indoor unit, reduces the noise of each shutdown indoor unit and improves the user experience.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a control method of a multi-split air conditioner.
Background
The multi-split air conditioner is an air conditioning system formed by combining an outdoor unit and a plurality of indoor units, wherein the indoor units adopt electronic expansion valves to regulate the flow of refrigerant.
In order to ensure the circulation quantity of the refrigerant, the electronic expansion valve of the shutdown indoor unit needs to be opened to 8 percent, noise similar to whistle is generated when the refrigerant flows through the valve body of the electronic expansion valve, and the whistle is prominent because the shutdown indoor unit has no other movable parts and almost no background noise. Users who are sensitive to such persistent noise may be unacceptable.
Disclosure of Invention
The invention provides a multi-split air conditioner control method, which shortens the duration time of the noise of a refrigerant of each shutdown indoor unit and improves the user experience.
In order to solve the technical problems, the invention adopts the following technical scheme:
a control method of a multi-split air conditioner comprises an outdoor unit and a plurality of indoor units, wherein an expansion valve is arranged on a connecting pipeline of each indoor unit and the outdoor unit;
the control method comprises the following steps:
(1) acquiring the number N of the shutdown indoor units;
(2) controlling the opening time of each shutdown indoor unit expansion valve according to N:
(21) if N =1, controlling the expansion valve of the shutdown indoor unit to open and close at intervals for a first set time in each control period;
(22) if N is more than 1 and less than or equal to a first set value, controlling the expansion valves of N shutdown indoor units to be opened for a second set time in a circulating mode in sequence in each control period, and only one expansion valve of one shutdown indoor unit is opened at the same time;
(23) if N is larger than a first set value, circularly selecting a set number of expansion valves of the shutdown indoor units as a group to open for a third set time, and only opening the selected group of expansion valves of the shutdown indoor units at the same time;
the opening degree of the expansion valve when opened is set to be a set opening degree, and the set number is less than N.
Further, the first set value is 5.
Still further, when N =1, the first set time is 60min, and the control cycle is 120 min; and in each control period, the expansion valve of the shutdown indoor unit is opened for 60min and closed for 60 min.
Furthermore, when N is more than 1 and less than or equal to a first set value: the larger N, the smaller the second set time.
Still further, in the step (22), when N =2, the second set time is 30min, and the control cycle is 60 min; in each control period, the expansion valve of each shutdown indoor unit is opened for 30min and closed for 30 min;
when N =3, the second set time is 15min, and the control period is 45 min; in each control period, the expansion valve of each shutdown indoor unit is opened for 15min and closed for 30 min;
when N =4, the second set time is 10min, and the control period is 40 min; in each control period, the expansion valve of each shutdown indoor unit is opened for 10min and closed for 30 min;
when N =5, the second set time is 8min, and the control period is 40 min; in each control period, the expansion valve of each shutdown indoor unit is opened for 8min and closed for 32 min.
Furthermore, the set number is 1/5-1/3 of the number N of the shutdown indoor units.
Still further, in step (23), when N =6, the set number = 2;
when N = 7-10, the number is set to be = 2;
when N = 11-12, the number is set to = 3;
when N = 13-15, the number is set to = 3;
when N = 16-20, the number is set to be = 4;
when N =21 to 25, the number is set to = 5.
Further, the set opening degree is 15% to 25% of the full opening degree of the expansion valve.
Still further, the set opening degree is 20% of a full opening degree of the expansion valve.
Compared with the prior art, the invention has the advantages and positive effects that: the multi-split air conditioner control method of the invention obtains the number N of the shutdown indoor units; if N =1, controlling the expansion valve of the shutdown indoor unit to open and close at intervals for a first set time in each control period; if N is more than 1 and less than or equal to a first set value, controlling the expansion valves of N shutdown indoor units to be opened for a second set time in a circulating mode in sequence in each control period, and only one expansion valve of one shutdown indoor unit is opened at the same time; if N is larger than a first set value, circularly selecting a set number of expansion valves of the shutdown indoor units as a group to open for a third set time, and only opening the selected group of expansion valves of the shutdown indoor units at the same time; the set number is less than N, and the opening degree when the expansion valve is opened is the set opening degree. Therefore, the control method of the invention shortens the opening time of the expansion valve of each shutdown indoor unit, further shortens the duration time of the noise of the refrigerant of each shutdown indoor unit, reduces the noise of each shutdown indoor unit and improves the user experience.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a block diagram of a multi-split air conditioner;
FIG. 2 is a flowchart illustrating an embodiment of a multi-split air conditioner control method according to the present invention;
fig. 3 is a waveform diagram of the opening and closing of the expansion valve of the shutdown indoor unit when N =1 in fig. 2;
fig. 4 is a waveform diagram of the opening and closing of the expansion valve of the shutdown indoor unit when N =2 in fig. 2;
fig. 5 is a waveform diagram of the opening and closing of the expansion valve of the shutdown indoor unit when N =3 in fig. 2;
fig. 6 is a waveform diagram of the opening and closing of the expansion valve of the shutdown indoor unit when N =4 in fig. 2;
fig. 7 is a waveform diagram of the opening and closing of the expansion valve of the shutdown indoor unit when N =5 in fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
The multi-split air conditioner comprises an outdoor unit and a plurality of indoor units, wherein an expansion valve is arranged on a connecting pipeline between each indoor unit and the outdoor unit. The expansion valve is generally disposed on a liquid pipe of the indoor unit to regulate the flow of the refrigerant flowing into the indoor unit. And a liquid pipe of each indoor unit is connected with a liquid pipe of the outdoor unit. For example, as shown in fig. 1, an expansion valve V1 is disposed on a liquid pipe of the indoor unit 1, an expansion valve V2 is disposed on a liquid pipe of the indoor unit 2, an expansion valve V3 is disposed on a liquid pipe of the indoor unit 3, and an expansion valve V4 is disposed on a liquid pipe of the indoor unit 4, and the direction of the arrow in fig. 1 indicates the flow direction of the refrigerant during heating.
The expansion valve in this embodiment is an electronic expansion valve. The present embodiment describes the opening size of the electronic expansion valve in percentage, 0% represents that the electronic expansion valve is fully closed, and 100% represents that the electronic expansion valve is fully opened.
The multi-split air conditioner control method of the embodiment mainly includes the following steps, which are shown in fig. 2.
Step S11: and acquiring the number N of the shutdown indoor units.
The shutdown indoor units are also called standby indoor units, i.e. the number N of standby indoor units is obtained.
Step S12: and controlling the opening time of each shutdown indoor unit expansion valve according to the number N of the shutdown indoor units.
The opening degree of the expansion valve of the starting indoor unit is automatically controlled according to the prior art, and is not described in detail herein.
(1) If N =1, controlling the expansion valve of the shutdown indoor unit to open and close at intervals for a first set time in each control period, wherein the opening degree of the expansion valve when the expansion valve is opened is a set opening degree.
That is, when there is only one closed indoor unit, the expansion valve of the closed indoor unit is controlled to open for the first set time and close for the first set time, … …, and the process is sequentially cycled. That is, in each control cycle, the expansion valve of the shutdown indoor unit is in an open state in a half cycle and in a closed state in a half cycle (no refrigerant flows through the valve body when the expansion valve is closed, and therefore no refrigerant flowing noise is generated), so that the opening time of the expansion valve of the shutdown indoor unit is shortened, the duration time of noise generated when the refrigerant flows through the valve body of the expansion valve is shortened, that is, the duration time of the refrigerant noise of the shutdown indoor unit is shortened, the noise of the shutdown indoor unit is reduced, and the user experience is improved.
In the embodiment, the first setting time T1 is 60min, and the control period T is 120 min; in each control period T, the expansion valve of the shutdown indoor unit is opened for 60min and closed for 60min, as shown in fig. 3; the requirement of the refrigerant circulation volume is met, the refrigerant noise duration of the shutdown indoor unit is shortened, and the user experience is improved.
(2) If N is more than 1 and less than or equal to a first set value, controlling the expansion valves of N shutdown indoor units to be opened for a second set time in a circulating mode in sequence in each control period, and only one expansion valve of one shutdown indoor unit is opened at the same time; the opening degree of the expansion valve when opened is a set opening degree.
That is, when N is greater than 1 and less than or equal to the first set value, in each control period, the expansion valves of N shutdown indoor units are sequentially and cyclically opened for a second set time, only one expansion valve of a shutdown indoor unit is opened at the same time, and the expansion valves of the other shutdown indoor units are all closed, so that the opening time of the expansion valve of each shutdown indoor unit is shortened, the duration time of the noise of the refrigerant of each shutdown indoor unit is reduced, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
In this embodiment, when 1 < N ≦ the first set value: the larger N is, the smaller the second set time is; that is, the larger the number of the shutdown indoor units, the shorter the opening time of the expansion valve of each shutdown indoor unit and the shorter the duration time of the refrigerant noise of each shutdown indoor unit in each control period, so that the duration time of the refrigerant noise of each shutdown indoor unit is further shortened, the noise of each shutdown indoor unit is further reduced, and the user experience is improved.
In the present embodiment, the first set value is 5.
For example, when N =2, the second set time T1 is 30min, and the control period T is 60 min; in each control period T, the expansion valve of each shutdown indoor unit is opened for 30min and closed for 30min, as shown in fig. 4; the requirement of the refrigerant circulation quantity is met, the refrigerant noise duration of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
When N =3, the second set time T1 is 15min, and the control period T is 45 min; in each control period T, the expansion valve of each shutdown indoor unit is opened for 15min and closed for 30min, as shown in fig. 5; the requirement of the refrigerant circulation quantity is met, the refrigerant noise duration of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
When N =4, the second set time T1 is 10min, and the control period T is 40 min; in each control period T, the expansion valve of each shutdown indoor unit is opened for 10min and closed for 30min, as shown in fig. 6; the requirement of the refrigerant circulation quantity is met, the refrigerant noise duration of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
When N =5, the second set time T1 is 8min, and the control period T is 40 min; in each control period T, the expansion valve of each shutdown indoor unit is opened for 8min and closed for 32min, as shown in fig. 7; the requirement of the refrigerant circulation quantity is met, the refrigerant noise duration of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
(3) If N is larger than a first set value, circularly selecting a set number of expansion valves of the shutdown indoor units as a group and simultaneously opening the expansion valves for a third set time, and only opening the expansion valves of the selected group of shutdown indoor units at the same time; the set number is less than N, and the opening degree when the expansion valve is opened is the set opening degree.
When N is larger than a first set value, a set number of expansion valves of the shutdown indoor units are selected as a group to be opened for a third set time, then a subsequent set number of expansion valves of the shutdown indoor units are selected as a group to be opened for the third set time, and when the last shutdown indoor unit is selected, the expansion valves are selected from the beginning and are circulated in sequence; only the expansion valves of the selected group of shutdown indoor units are opened at the same time, and the expansion valves of the other shutdown indoor units are closed, so that the opening time of the expansion valve of each shutdown indoor unit is shortened, the duration time of the noise of the refrigerant of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
In the present embodiment, the first set value is 5. When N is more than 1 and less than or equal to 5, controlling the expansion valves of the N shutdown indoor units to be opened for a second set time in a circulating mode in sequence in each control period; and when N is larger than 5, sequentially and circularly selecting a set number of expansion valves of the shutdown indoor unit as a group and simultaneously opening the group for a third set time. That is, when N is more than 1 and less than or equal to 5, the expansion valve of one shutdown indoor unit is controlled to open each time; when N is more than 5, the expansion valves of one group of shutdown indoor units are controlled to open each time, so that the control is convenient, and the requirement of the refrigerant circulation quantity is met.
In the embodiment, the number of the indoor units is 1/5-1/3 of the number N of the shutdown indoor units, that is, the number of the indoor units in each group is 1/5-1/3 of the number N of the shutdown indoor units, that is, the number of the indoor units controlled simultaneously reaches 1/5-1/3 of the number of the shutdown indoor units, so that the control is convenient, and the requirement of the refrigerant circulation amount is met.
Specifically, the method comprises the following steps:
when N =6, that is, there are 6 shutdown indoor units, the numbers of which are respectively 1#, 2#, 3#, 4#, 5#, and 6#, and the set number = 2; firstly, the expansion valves of 1# and 2# are selected to be opened for a third set time, then the expansion valves of 3# and 4# are selected to be opened for a third set time, then the expansion valves of 5# and 6# are selected to be opened for a third set time, then the expansion valves of 1# and 2# are selected to be opened for a third set time, … …, and the circulation is performed sequentially. The expansion valve of the shutdown indoor unit is controlled to be opened by controlling 2 shutdown indoor units at each time, so that the control is convenient, and the requirement of the refrigerant circulation quantity is met. In the present embodiment, when N =6, the third setting time is 15 min. When N =6, 2 shutdown indoor unit expansion valves are sequentially selected in a circulating mode and opened for 15min at the same time, so that the requirement of the circulation quantity of the refrigerant is met, the noise duration time of the refrigerant of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
When N = 7-10, that is, there are 6, 7, 8, 9, or 10 off indoor units, the set number = 2. For example, N = 7: the number of the shutdown indoor units is 7, the serial numbers are respectively 1#, 2#, 3#, 4#, 5#, 6#, and 7#, and the set number is 2; firstly, the expansion valves of 1# and 2# are selected to be opened for a third set time, then the expansion valves of 3# and 4# are selected to be opened for a third set time, then the expansion valves of 5# and 6# are selected to be opened for a third set time, then the expansion valves of 7# and 1# are selected to be opened for a third set time, then the expansion valves of 2# and 3# are selected to be opened for a third set time, … …, and the cycle is performed in sequence. The expansion valve of the shutdown indoor unit is controlled to be opened by controlling 2 shutdown indoor units at each time, so that the control is convenient, and the requirement of the refrigerant circulation quantity is met. In the embodiment, when N = 7-10, the third setting time is 10 min. When N =7 ~ 10, 2 shutdown indoor unit expansion valves are selected in a circulating manner in sequence and are opened for 10min at the same time, so that the requirement of the refrigerant circulation volume is met, the refrigerant noise duration of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
When N =11 ~ 12, namely there are 11 or 12 shut-down indoor units, the set number =3, and the third set time is 10 min. The expansion valve of the shutdown indoor unit is controlled to be opened by controlling 3 shutdown indoor units at each time, so that the control is convenient, and the requirement of the refrigerant circulation quantity is met. When N = 11-12, 3 shutdown indoor unit expansion valves are sequentially selected in a circulating mode and opened for 10min, so that the requirement of the circulation quantity of the refrigerant is met, the noise duration time of the refrigerant of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
When N =13 ~ 15, namely there are 13, 14 or 15 shut-down indoor units, the set number =3, and the third set time is 8 min. The expansion valve of the shutdown indoor unit is controlled to be opened by controlling 3 shutdown indoor units at each time, so that the control is convenient, and the requirement of the refrigerant circulation quantity is met. When N =13 ~ 15, cycle selection 3 indoor set expansion valves of shutting down simultaneously and open 8min in proper order, both satisfied the demand of refrigerant circulation volume, shortened the refrigerant noise duration of every indoor set of shutting down again, reduced the noise of every indoor set of shutting down, improved user experience.
When N =16 ~ 20, namely there are 16, 17, 18, 19 or 20 shutdown indoor units, the set number =4, and the third set time is 8 min. The expansion valve of 4 shutdown indoor units is controlled to be opened at each time, so that the control is convenient, and the requirement of the refrigerant circulation quantity is met. When N = 16-20, 4 shutdown indoor unit expansion valves are sequentially selected in a circulating mode and opened for 8min, so that the requirement of the circulation quantity of the refrigerant is met, the noise duration of the refrigerant of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
When N = 21-25, the number is set to =5, and the third set time is 8 min. The expansion valve of 5 shutdown indoor units is controlled to be opened at each time, so that the control is convenient, and the requirement of the refrigerant circulation quantity is met. When N = 21-25, 5 shutdown indoor unit expansion valves are sequentially selected in a circulating mode and opened for 8min, so that the requirement of the circulation quantity of the refrigerant is met, the refrigerant noise duration of each shutdown indoor unit is shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
The specific number of shutdown indoor units selected in a sequential and cyclic manner when N = 11-12, N = 13-15, N = 16-20, and N = 21-25 is similar to the description when N =6 and N =7, and reference may be made to the above description, and details are not repeated here.
In the embodiment, the set opening degree of the expansion valve of the shutdown indoor unit is 15-25% of the full opening degree of the expansion valve, that is, the opening ratio of the expansion valve is 15-25%, so that not only is the increase of refrigerant flow noise caused by too large opening degree avoided, but also the refrigerant circulation volume cannot be satisfied caused by too small opening degree avoided; therefore, in this opening range, the refrigerant circulation amount is satisfied, and the increase in refrigerant flow noise is avoided. As a preferable design of this embodiment, the set opening degree of the expansion valve of the shutdown indoor unit is 20% of the full opening degree of the expansion valve, which not only meets the requirement of the refrigerant circulation amount, but also avoids the increase of the refrigerant flow noise.
In the control method of the multi-split air conditioner of the embodiment, the number N of the shutdown indoor units is obtained; if N =1, controlling the expansion valve of the shutdown indoor unit to open and close at intervals for a first set time in each control period; if N is more than 1 and less than or equal to a first set value, controlling the expansion valves of N shutdown indoor units to be opened for a second set time in a circulating mode in sequence in each control period, and only one expansion valve of one shutdown indoor unit is opened at the same time; if N is larger than a first set value, circularly selecting a set number of expansion valves of the shutdown indoor units as a group to open for a third set time, and only opening the selected group of expansion valves of the shutdown indoor units at the same time; the set number is less than N, and the opening degree when the expansion valve is opened is the set opening degree. Therefore, the control method of the embodiment shortens the opening time of the expansion valve of each shutdown indoor unit, further shortens the duration time of the noise of the refrigerant of each shutdown indoor unit, reduces the noise of each shutdown indoor unit, and improves the user experience.
According to the control method, the time-sharing opening control is carried out on the expansion valves of the shutdown indoor units, so that the opening time of the expansion valve of each shutdown indoor unit is shortened, the duration time of the flowing noise of the refrigerant of each shutdown indoor unit is further shortened, the noise of each shutdown indoor unit is reduced, and the user experience is improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (9)
1. A control method of a multi-split air conditioner comprises an outdoor unit and a plurality of indoor units, wherein an expansion valve is arranged on a connecting pipeline of each indoor unit and the outdoor unit; the method is characterized in that:
the control method comprises the following steps:
s1, acquiring the number N of the shutdown indoor units;
s2, controlling the opening time of each shutdown indoor unit expansion valve according to N:
s21, if N =1, controlling the expansion valve of the shutdown indoor unit to open and close at intervals for a first set time in each control period;
s22, if N is more than 1 and less than or equal to a first set value, controlling the expansion valves of the N shutdown indoor units to be opened for a second set time in a circulating mode in each control period, and only one expansion valve of the shutdown indoor unit is opened at the same time;
s23, if N is larger than the first set value, circularly selecting a set number of expansion valves of the shutdown indoor units as a group to open for a third set time, and only opening the selected group of expansion valves of the shutdown indoor units at the same time;
the opening degree of the expansion valve when opened is set to be a set opening degree, and the set number is less than N.
2. The control method according to claim 1, characterized in that: the first set value is 5.
3. The control method according to claim 1, characterized in that:
when N =1, the first set time is 60min, and the control period is 120 min; and in each control period, the expansion valve of the shutdown indoor unit is opened for 60min and closed for 60 min.
4. The control method according to claim 1, characterized in that: when N is more than 1 and less than or equal to a first set value: the larger N, the smaller the second set time.
5. The control method according to claim 1, characterized in that: in the step S22, in step S22,
when N =2, the second set time is 30min, and the control period is 60 min; in each control period, the expansion valve of each shutdown indoor unit is opened for 30min and closed for 30 min;
when N =3, the second set time is 15min, and the control period is 45 min; in each control period, the expansion valve of each shutdown indoor unit is opened for 15min and closed for 30 min;
when N =4, the second set time is 10min, and the control period is 40 min; in each control period, the expansion valve of each shutdown indoor unit is opened for 10min and closed for 30 min;
when N =5, the second set time is 8min, and the control period is 40 min; in each control period, the expansion valve of each shutdown indoor unit is opened for 8min and closed for 32 min.
6. The control method according to claim 1, characterized in that: the set number is 1/5-1/3 of the number N of the shutdown indoor units.
7. The control method according to claim 1, characterized in that: in the step S23, in step S23,
when N =6, then the number is set = 2;
when N = 7-10, the number is set to be = 2;
when N = 11-12, the number is set to = 3;
when N = 13-15, the number is set to = 3;
when N = 16-20, the number is set to be = 4;
when N =21 to 25, the number is set to = 5.
8. The control method according to any one of claims 1 to 7, characterized in that: the set opening degree is 15-25% of the full opening degree of the expansion valve.
9. The control method according to claim 8, characterized in that: the set opening degree is 20% of the full opening degree of the expansion valve.
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| CN108168169B (en) * | 2017-12-01 | 2020-09-18 | 青岛海尔空调电子有限公司 | Noise control method of multi-connected air conditioning system |
| CN109631248B (en) * | 2018-11-16 | 2021-05-25 | 青岛海尔空调电子有限公司 | Multi-split air conditioner refrigeration oil return noise reduction control method and system |
| CN110595004B (en) * | 2019-09-29 | 2021-06-18 | 宁波奥克斯电气股份有限公司 | Air conditioner noise reduction control method and system and air conditioner |
| CN110715414B (en) * | 2019-10-16 | 2021-04-20 | 广东美的制冷设备有限公司 | Air conditioner and control method and control system thereof |
| KR20210102736A (en) | 2020-02-12 | 2021-08-20 | 삼성전자주식회사 | Server and contrl method thereof |
| CN111397164B (en) * | 2020-03-31 | 2022-04-19 | 广东美的制冷设备有限公司 | Multi-split air conditioning system and control method and control device thereof |
| CN113494764A (en) * | 2020-04-08 | 2021-10-12 | 广东美的制冷设备有限公司 | Control method of multi-split air conditioner, multi-split air conditioner and storage medium |
| CN113108419B (en) * | 2021-03-15 | 2022-06-17 | 珠海格力电器股份有限公司 | Control method of multi-split air conditioning system |
| CN114811863B (en) * | 2022-05-16 | 2023-06-02 | 美的集团武汉暖通设备有限公司 | Control method of multi-split air conditioner, controller, air conditioner and medium |
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