CN204693687U - A kind of air-conditioner set - Google Patents
A kind of air-conditioner set Download PDFInfo
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- CN204693687U CN204693687U CN201520338038.XU CN201520338038U CN204693687U CN 204693687 U CN204693687 U CN 204693687U CN 201520338038 U CN201520338038 U CN 201520338038U CN 204693687 U CN204693687 U CN 204693687U
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- cross valve
- mouth
- outdoor condenser
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- valve
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- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000010257 thawing Methods 0.000 abstract description 30
- 239000003507 refrigerant Substances 0.000 description 14
- 238000005057 refrigeration Methods 0.000 description 11
- 230000008676 import Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
This application discloses a kind of air-conditioner set, comprise the outdoor condenser module that compressor, indoor set, main cross valve and n are in parallel, n >=2; The D mouth of main cross valve and the outlet of compressor, the inlet communication of S mouth and compressor, a stub interface of main cross valve is communicated with the first port of indoor set, and another stub interface ends; Each outdoor condenser module comprises choke valve, from cross valve and outdoor condenser.At least two outdoor condenser module in parallel and main cross valve are set in this air-conditioner set, and each outdoor condenser module is all by controlling separately from cross valve, when carrying out outdoor condenser defrosting, one of them outdoor condenser can be selected to carry out defrosting, only need by control in this outdoor condenser module from cross valve electric and off-position, and the aperture of choke valve, while this outdoor condenser carries out defrosting, air-conditioner set can continue as indoor set heat supply, thus improves the comfort level of user.
Description
Technical field
The utility model relates to air-conditioning technical field, particularly a kind of air-conditioner set.
Background technology
Air-conditioner set generally includes compressor, cross valve, outdoor condenser and indoor set, there is heating mode, refrigeration mode and defrosting pattern, wherein, cross valve on market comprises D usually, E, S, C interface, D mouth is main interface, be positioned at cross valve side, E, S, C interface is arranged in the opposite side of cross valve in order successively, wherein E and C interface are stub interface, move control S mouth by the spool of cross valve to communicate with C mouth or E mouth, under normal circumstances, when cross valve obtains electric, the D mouth of cross valve is communicated with E mouth, C mouth is communicated with S mouth, and when cross valve power-off, the D mouth of cross valve is communicated with C mouth, E mouth is communicated with S mouth.
Existing air-conditioner set is after carrying out heating mode a period of time, meeting frosting on outdoor condenser, affect the normal operation of air-conditioner set, need to carry out defrosting operation to it, now, the flow direction of the refrigerant in air-conditioner set with refrigeration stream to identical, hot refrigerant is flow through outdoor condenser, thus fallen by the melts that cool for outdoor condenser condenses above, but meanwhile, indoor set can flow through cold liquid refrigerants and evaporate, cause indoor set temperature very low, indoor set cannot continue heat supply, causes for thermal break, affects the comfort level of user.
In sum, when how to solve air-conditioner set defrosting, indoor set cannot the problem of heat supply, becomes those skilled in the art's problem demanding prompt solution.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of air-conditioner set, with realize air-conditioner set carry out defrosting operation time, indoor set can continue heat supply, improves the comfort level of user.
For achieving the above object, the utility model provides following technical scheme:
A kind of air-conditioner set, comprises compressor and indoor set, also comprises the outdoor condenser module of main cross valve and n parallel connection, n >=2; The D mouth of described main cross valve and the outlet of described compressor, the S mouth of described main cross valve and the inlet communication of described compressor, a stub interface of described main cross valve is communicated with the first port of described indoor set, and another stub interface ends; Each described outdoor condenser module comprises:
Choke valve, is communicated with the second port of described indoor set;
From cross valve, described from the D mouth of cross valve and the outlet of described compressor, described from the S mouth of cross valve and the inlet communication of described compressor, a described stub interface cut-off from cross valve;
Outdoor condenser, two ports of described outdoor condenser are communicated with the described stub interface do not ended from cross valve with described choke valve respectively.
Preferably, in above-mentioned air-conditioner set, the C mouth cut-off of described main cross valve, the E mouth of described main cross valve is communicated with the first port of described indoor set; The described E mouth from cross valve ends, and the described C mouth from cross valve is communicated with described outdoor condenser.
Preferably, in above-mentioned air-conditioner set, the E mouth cut-off of described main cross valve, the C mouth of described main cross valve is communicated with the first port of described indoor set; The described C mouth from cross valve ends, and the described E mouth from cross valve is communicated with described outdoor condenser.
Preferably, in above-mentioned air-conditioner set, the C mouth cut-off of described main cross valve, the E mouth of described main cross valve is communicated with the first port of described indoor set; The described C mouth from cross valve ends, and the described E mouth from cross valve is communicated with described outdoor condenser.
Preferably, in above-mentioned air-conditioner set, the E mouth cut-off of described main cross valve, the C mouth of described main cross valve is communicated with the first port of described indoor set; The described E mouth from cross valve ends, and the described C mouth from cross valve is communicated with described outdoor condenser.
Preferably, in above-mentioned air-conditioner set, described choke valve is electric expansion valve or heating power expansion valve.
Preferably, in above-mentioned air-conditioner set, described outdoor condenser module also comprises the outdoor fan being arranged on described outdoor condenser external.
Compared with prior art, the beneficial effects of the utility model are:
In the air-conditioner set that the utility model provides, the outdoor condenser module in parallel by setting at least two and main cross valve, and each outdoor condenser module is all by controlling separately from cross valve, when carrying out the defrosting of outdoor condenser, one of them outdoor condenser can be selected to carry out defrosting in turn, only need by control in this outdoor condenser module from cross valve electric and off-position, and the aperture of choke valve can complete, while this outdoor condenser carries out defrosting, air-conditioner set can continue as indoor set heat supply, thus improve the comfort level of user.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The connection diagram of the first air-conditioner set that Fig. 1 provides for the utility model embodiment 1;
The connection diagram of the second air-conditioner set that Fig. 2 provides for the utility model embodiment 2;
The connection diagram of the third air-conditioner set that Fig. 3 provides for the utility model embodiment 3;
The connection diagram of the 4th kind of air-conditioner set that Fig. 4 provides for the utility model embodiment 4.
In above-mentioned Fig. 1-Fig. 4,1 for compressor, 2 be main cross valve, 3 for be outdoor condenser from cross valve, 4,5 be choke valve, 6 be outdoor fan, 7 for indoor set, 701 be the first port, 702 be the second port.
Detailed description of the invention
Core of the present utility model there is provided a kind of air-conditioner set, can when air-conditioner set carries out defrosting, and indoor set heat supply is not interrupted, and improves users'comfort.
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1-Fig. 4, the utility model embodiment provides a kind of air-conditioner set, comprises the outdoor condenser module that compressor 1, indoor set 7, main cross valve 2 and n are in parallel, n >=2; Wherein, the D mouth of main cross valve 2 and the outlet of compressor 1, the S mouth of main cross valve 2 and the inlet communication of compressor 1, a stub interface (i.e. E mouth and in C mouth) of main cross valve 2 is communicated with the first port 701 of indoor set 7, another stub interface ends, and can not circulate; Each outdoor condenser module includes choke valve 5, from cross valve 3 and outdoor condenser 4, wherein, choke valve 5 is communicated with the second port 702 of indoor set 7; From the D mouth of cross valve 3 and the outlet of compressor 1, from the S mouth of cross valve 3 and the inlet communication of compressor 1, from a stub interface cut-off of cross valve 3, can not circulate, another stub interface be not cut off is communicated with a port in two ports of outdoor condenser 4, and another port of outdoor condenser 4 is communicated with choke valve 5.
The operation principle of above-mentioned air-conditioner set is: be connected in parallel in air-conditioner set by least two outdoor condensers 4, each outdoor condenser 4 is respectively by the respective control carrying out refrigerant direction from cross valve 3 and choke valve 5, when needs carry out defrosting operation to one of them outdoor condenser 4, must electricly the flow direction freezed in refrigerant edge be made to enter this outdoor condenser 4 with off-position by what control to be connected with this outdoor condenser 4 from cross valve 3, and by regulating the aperture of choke valve 5, control the flow of refrigerant, independent defrosting is carried out to this outdoor condenser 4, and meanwhile, other outdoor condenser 4 not carrying out defrosting by control to be communicated with it from cross valve 3 must electric and off-position, refrigerant is made not carry out in the outdoor condenser 4 of defrosting along heating to flow to enter, thus achieve while independent defrosting is carried out to outdoor condenser 4, to indoor set 7 heat supply, indoor set 7 heat supply is not interrupted, ensure that the comfort level of user.
Because the interface connected mode of cross valve is different, electric not identical with the control of power-off to obtaining of cross valve yet, below according to the interface connected mode of cross valve, air-conditioner set is described:
Embodiment 1:
As shown in Figure 1, main cross valve 2 is communicated with the export and import of compressor 1 with S mouth respectively with the D mouth from cross valve 3, the C mouth cut-off of main cross valve 2, and the E mouth of main cross valve 2 is communicated with the first port 701 of indoor set 7; The E mouth from cross valve 3 of each outdoor condenser module ends, and be communicated with from the C mouth of cross valve 3 with corresponding outdoor condenser 4, the connection of remaining part is constant.
The mode of operation of the air-conditioner set in embodiment 1 is divided into common heating mode, half heating mode, normal refrigeration mode, half refrigeration mode and heats defrosting pattern, for convenience, be described for two outdoor condenser module, the operation principle of each mode of operation is as follows:
Common heating mode, main cross valve 2 and two are all in obtain electricity condition from cross valve 3, namely main cross valve 2 be D mouth from cross valve 3 and be communicated with E mouth, C mouth is communicated with S mouth, now, refrigerant exports out from compressor 1, successively through the D mouth of main cross valve 2, the E mouth of main cross valve 2, first port 701 of indoor set 7, second port 702 of indoor set 7, shunting afterwards enters two outdoor condenser module, each all successively through choke valve 5, outdoor condenser 4, from the C mouth of cross valve 3, from the S mouth of cross valve 3, compressor 1 is returned afterwards from compressor 1 import, in this process, refrigerant is condensation release heat in indoor set 7, indoor set 7 heat supply, complete common heating mode, two outdoor condenser module all participate in heating.
Half heating mode, under common heating mode, when heating load reduces, needs the outdoor condenser module of closed portion, now, only needs the choke valve 5 of closing one of them outdoor condenser module can complete half heating mode.
Normal refrigeration mode, main cross valve 5 and two are all in off-position from cross valve 3, namely main cross valve 2 be D mouth from cross valve 3 and be communicated with C mouth, E mouth is communicated with S mouth, now, refrigerant exports out from compressor 1, enter two outdoor condenser module respectively, each outdoor condenser module passes through the D mouth from cross valve 3 all successively, from the C mouth of cross valve 3, outdoor condenser 4, choke valve 5, two-way converges afterwards, enter the second port 702 of indoor set 7 together, first port 701 of indoor set 7, the E mouth of main cross valve 2, the S mouth of main cross valve 2, import through compressor 1 returns compressor 1, in this process, refrigerant heat release in two outdoor condensers 4, evaporation endothermic in indoor set 7, complete normal refrigeration mode, two outdoor condenser module all participate in refrigeration
Half refrigeration mode, under normal refrigeration mode, when cooling load reduces, need the outdoor condenser 4 of closed portion, now, if make one of them outdoor condenser module from cross valve 3 electric, the choke valve 5 of simultaneously cutting out in this module can complete half refrigeration mode.
Heat defrosting pattern, under common heating mode, when some outdoor condensers 4 need defrost, then only need by be communicated with this outdoor condenser 4 from cross valve 3 power-off, the choke valve be communicated with this outdoor condenser 4 is opened 5 to the specific aperture of defrosting simultaneously, now, the high-temperature gas refrigerant that compressor 1 ejects will be divided into two-way, and a road flows to indoor set 7 through main cross valve 2, completes and heats, after entering the outdoor condenser module of not carrying out defrosting, return compressor 1; Another road high-temperature gas refrigerant through needs the outdoor condenser module of defrosting from cross valve 3, enter in this outdoor condenser 4, complete and the defrosting of this outdoor condenser 4 is operated, after converge through choke valve 5 and machine 7 refrigerant out indoor, enter the outdoor condenser module of not carrying out defrosting together, finally return compressor 1, complete and heat defrosting pattern, when needing to carry out defrosting to other outdoor condenser 4, the outdoor condenser 4 of defrosting is needed to repeat above-mentioned operation to the next one.Can find out, heating defrosting pattern can while carrying out defrosting operation, and indoor set heat supply is not interrupted, thus improves the comfort level of user.
Embodiment 2:
As shown in Figure 2, main cross valve 2 is communicated with the export and import of compressor 1 with S mouth respectively with the D mouth from cross valve 3, the E mouth cut-off of main cross valve 2, and the C mouth of main cross valve 2 is communicated with the first port 701 of indoor set 7; The C mouth from cross valve 3 of each outdoor condenser module ends, and be communicated with from the E mouth of cross valve 3 with corresponding outdoor condenser 4, the connection of remaining part is constant.
Air-conditioner set in embodiment 2 comprises 5 kinds of patterns equally, the main cross valve 2 under often kind of pattern and from cross valve 3 electric as shown in table 1 with off-position:
The main cross valve of table 1 embodiment 2, from cross valve each pattern corresponding electric, off-position
Air-conditioner set in concrete operation principle and embodiment 1 is similar, does not repeat them here.
Embodiment 3:
As shown in Figure 3, main cross valve 2 is communicated with the export and import of compressor 1 with S mouth respectively with the D mouth from cross valve 3, the C mouth cut-off of main cross valve 2, and the E mouth of main cross valve 2 is communicated with the first port 701 of indoor set 7; The C mouth from cross valve 3 of each outdoor condenser module ends, and be communicated with from the E mouth of cross valve 3 with corresponding outdoor condenser 4, the connection of remaining part is constant.
Air-conditioner set in embodiment 3 comprises 5 kinds of patterns equally, the main cross valve 2 under often kind of pattern and from cross valve 3 electric as shown in table 2 with off-position:
The main cross valve of table 2 embodiment 3, from cross valve each pattern corresponding electric, off-position
Air-conditioner set in concrete operation principle and embodiment 1 is similar, does not repeat them here.
Embodiment 4:
As shown in Figure 4, main cross valve 2 is communicated with the export and import of compressor 1 with S mouth respectively with the D mouth from cross valve 3, the E mouth cut-off of main cross valve 2, and the C mouth of main cross valve 2 is communicated with the first port 701 of indoor set 7; The E mouth from cross valve 3 of each outdoor condenser module ends, and be communicated with from the C mouth of cross valve 3 with corresponding outdoor condenser 4, the connection of remaining part is constant.
Air-conditioner set in embodiment 4 comprises 5 kinds of patterns equally, the main cross valve 2 under often kind of pattern and from cross valve 3 electric as shown in table 3 with off-position:
The main cross valve of table 3 embodiment 4, from cross valve each pattern corresponding electric, off-position
Air-conditioner set in concrete operation principle and embodiment 1 is similar, does not repeat them here.
Certainly, except the cross valve connected mode adopting above embodiment, the interface type of attachment from cross valve 3 of each outdoor condenser module can be different, correspondingly, each must electricly be not quite similar with off-position from cross valve 3, as long as 5 above-mentioned patterns can be realized, do not enumerate at this.Above embodiment is all described for two outdoor condenser module parallel connections, and certainly, can also comprise three, a four or more outdoor condenser module, its operation principle is identical with when two.
Further optimization, in the present embodiment, choke valve 5 can be electric expansion valve or heating power expansion valve, certainly, as required, can also use stop valve.
Further, in the present embodiment, outdoor condenser module also comprises the outdoor fan 6 of condenser 4 outside disposed in the outdoor, for air-supply, improve the heat exchange efficiency of outdoor condenser 4, when carrying out half heating mode, half refrigeration mode, close the outdoor fan 6 corresponding with out-of-work outdoor condenser 4; When carrying out heating defrosting pattern, close the outdoor fan 6 corresponding with needing the outdoor condenser 4 of defrosting, object is in order to energy-conservation and complete each pattern better.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. an air-conditioner set, comprises compressor (1) and indoor set (7), it is characterized in that, also comprises the outdoor condenser module of main cross valve (2) and n parallel connection, n >=2; The D mouth of described main cross valve (2) and the outlet of described compressor (1), the S mouth of described main cross valve (2) and the inlet communication of described compressor (1), a stub interface of described main cross valve (2) is communicated with first port (701) of described indoor set (7), and another stub interface ends; Each described outdoor condenser module comprises:
Choke valve (5), is communicated with second port (702) of described indoor set (7);
From cross valve (3), the outlet of the described D mouth from cross valve (3) and described compressor (1), the inlet communication of the described S mouth from cross valve (3) and described compressor (1), a described stub interface cut-off from cross valve (3);
Outdoor condenser (4), two ports of described outdoor condenser (4) are communicated with the described stub interface do not ended from cross valve (3) with described choke valve (5) respectively.
2. air-conditioner set according to claim 1, is characterized in that, the C mouth cut-off of described main cross valve (2), and the E mouth of described main cross valve (2) is communicated with first port (701) of described indoor set (7); The described cut-off of the E mouth from cross valve (3), the described C mouth from cross valve (3) is communicated with described outdoor condenser (4).
3. air-conditioner set according to claim 1, is characterized in that, the E mouth cut-off of described main cross valve (2), and the C mouth of described main cross valve (2) is communicated with first port (701) of described indoor set (7); The described cut-off of the C mouth from cross valve (3), the described E mouth from cross valve (3) is communicated with described outdoor condenser (4).
4. air-conditioner set according to claim 1, is characterized in that, the C mouth cut-off of described main cross valve (2), and the E mouth of described main cross valve (2) is communicated with first port (701) of described indoor set (7); The described cut-off of the C mouth from cross valve (3), the described E mouth from cross valve (3) is communicated with described outdoor condenser (4).
5. air-conditioner set according to claim 1, is characterized in that, the E mouth cut-off of described main cross valve (2), and the C mouth of described main cross valve (2) is communicated with first port (701) of described indoor set (7); The described cut-off of the E mouth from cross valve (3), the described C mouth from cross valve (3) is communicated with described outdoor condenser (4).
6. the air-conditioner set according to any one of claim 1-5, is characterized in that, described choke valve (5) is electric expansion valve or heating power expansion valve.
7. the air-conditioner set according to any one of claim 1-5, is characterized in that, described outdoor condenser module also comprises the outdoor fan (6) being arranged on described outdoor condenser (4) outside.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520338038.XU CN204693687U (en) | 2015-05-22 | 2015-05-22 | A kind of air-conditioner set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520338038.XU CN204693687U (en) | 2015-05-22 | 2015-05-22 | A kind of air-conditioner set |
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| CN204693687U true CN204693687U (en) | 2015-10-07 |
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| CN201520338038.XU Expired - Fee Related CN204693687U (en) | 2015-05-22 | 2015-05-22 | A kind of air-conditioner set |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526680A (en) * | 2016-01-19 | 2016-04-27 | 珠海格力电器股份有限公司 | Defrosting control method and device for multi-system air cooling unit |
| CN105758075A (en) * | 2016-04-01 | 2016-07-13 | 珠海格力电器股份有限公司 | Sectional type heating and defrosting air-conditioning system and heating and defrosting control method implemented by same |
| CN106556082A (en) * | 2015-09-25 | 2017-04-05 | 青岛海尔空调电子有限公司 | Central air-conditioning |
| CN106871345A (en) * | 2017-02-06 | 2017-06-20 | 邯郸美的制冷设备有限公司 | Defrosting system and air-conditioner are not shut down |
| CN109405336A (en) * | 2018-11-07 | 2019-03-01 | 珠海格力电器股份有限公司 | Air-conditioning system and control method |
| CN115264923A (en) * | 2022-08-09 | 2022-11-01 | 宁波奥克斯电气股份有限公司 | Multi-split control method and multi-split system |
| WO2022233132A1 (en) * | 2021-05-06 | 2022-11-10 | 青岛海尔空调器有限总公司 | Air conditioner outdoor unit, air conditioner, air conditioner control method and apparatus, and device and medium |
-
2015
- 2015-05-22 CN CN201520338038.XU patent/CN204693687U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556082A (en) * | 2015-09-25 | 2017-04-05 | 青岛海尔空调电子有限公司 | Central air-conditioning |
| CN106556082B (en) * | 2015-09-25 | 2019-07-12 | 青岛海尔空调电子有限公司 | Central air-conditioning |
| CN105526680A (en) * | 2016-01-19 | 2016-04-27 | 珠海格力电器股份有限公司 | Defrosting control method and device for multi-system air cooling unit |
| CN105526680B (en) * | 2016-01-19 | 2018-09-25 | 珠海格力电器股份有限公司 | The air-cooled cold wind unit defrosting control method of multisystem and device |
| CN105758075A (en) * | 2016-04-01 | 2016-07-13 | 珠海格力电器股份有限公司 | Sectional type heating and defrosting air-conditioning system and heating and defrosting control method implemented by same |
| CN106871345A (en) * | 2017-02-06 | 2017-06-20 | 邯郸美的制冷设备有限公司 | Defrosting system and air-conditioner are not shut down |
| CN109405336A (en) * | 2018-11-07 | 2019-03-01 | 珠海格力电器股份有限公司 | Air-conditioning system and control method |
| CN109405336B (en) * | 2018-11-07 | 2023-08-18 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| WO2022233132A1 (en) * | 2021-05-06 | 2022-11-10 | 青岛海尔空调器有限总公司 | Air conditioner outdoor unit, air conditioner, air conditioner control method and apparatus, and device and medium |
| CN115264923A (en) * | 2022-08-09 | 2022-11-01 | 宁波奥克斯电气股份有限公司 | Multi-split control method and multi-split system |
| CN115264923B (en) * | 2022-08-09 | 2024-05-10 | 宁波奥克斯电气股份有限公司 | Multi-split control method and multi-split system |
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