CN100340819C - Multiple air conditioner system and operation of its indoor units - Google Patents
Multiple air conditioner system and operation of its indoor units Download PDFInfo
- Publication number
- CN100340819C CN100340819C CNB2005100539234A CN200510053923A CN100340819C CN 100340819 C CN100340819 C CN 100340819C CN B2005100539234 A CNB2005100539234 A CN B2005100539234A CN 200510053923 A CN200510053923 A CN 200510053923A CN 100340819 C CN100340819 C CN 100340819C
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- indoor set
- producing medium
- cold
- air
- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a multiple air conditioner system and operation of its indoor units, comprising at least an outdoor set and a plurality of indoor set parallel to the outdoor set. Each indoor set comprises: indoor set fault location part for detecting the indoor set fault; refrigerant adjustable valve for automatically cut off the refrigerant flow in the indoor set tubing based on the signal from the indoor set fault location part when the indoor set goes wrong. The invention solves the problem that it is unnecessary to cut off all of the system operation even part system of the multiple air conditioner system goes wrong.
Description
Technical field
The present invention relates to the operation method of a kind of multi-air-conditioner and indoor set thereof, relate in particular to a part in the system when breaking down, can carry out the multi-air-conditioner of fair game and the operation method of indoor set thereof.
Background technology
General multi-air-conditioner comprises as shown in Figure 1: a plurality of off-premises stations 1, a plurality of indoor sets 2 that are connected with a plurality of off-premises stations 1 and the central controller 3 that is used to control a plurality of indoor set 2 input instructions.And each off-premises station 1 and a plurality of indoor set 2 are provided with off-premises station chip 4 and indoor set chip 5, have the repeater 6 in order to connect both between central controller 3 and off-premises station chip 4.The structure of other relevant multi-air-conditioner has been done detailed explanation on Korean granted patent communique " 10-0412411 ".
This multi-air-conditioner, central controller 3, repeater 6, off-premises station 1 and indoor set 2 carry out data communication in the particular communication mode, in order to the state of grasping other device or carry out necessary work.That is, to each indoor set 2 input control order, indoor set chip 5 is analyzed the data of being received to the user by wire remote control devices 7 or wireless remote control (not shown), with this each device of controlling indoor set 2 to satisfy user's demand.In addition, indoor set chip 5 is transferred to off-premises station chip 4 with the data of receiving by order wire, and the data that off-premises station chip 4 is analyzed by 5 transmission of indoor set chip are controlled each device of off-premises station 1 with this.
This existing multi-air-conditioner, when motor-driven valve (not shown) that the chip 5 of the part indoor set 2 in whole indoor sets broke down, was arranged at indoor set 2 break down or off-premises station chip 4 and indoor set chip 5 between part system such as communication abnormality take place when unusual, the off-premises station 1 that is connected with the indoor set 5 that breaks down is forced the whole indoor sets under this off-premises station 1 out of service in order to prevent that fault state from worsening.
But, even this have only the part indoor set that whole indoor sets operations take place unusually also will to stop, not only can reducing the air-conditioner efficiency in other space that is provided with the normal indoor set of function, and stop frequently because of system that to have increased the user discontented.
Summary of the invention
The present invention is in order to solve aforesaid problem, even its purpose is to provide a kind of part system of multi-air-conditioner that the running of whole systems takes place also needn't interrupt unusually, and multi-air-conditioner and indoor set operation method thereof that can protection system.Multi-air-conditioner provided by the present invention in order to achieve the above object, a plurality of indoor sets with indoor set chip that comprise at least one off-premises station and be connected side by side with described at least one off-premises station is characterized in that
Each indoor set comprises: indoor set fault detect portion is used to detect the fault of described indoor set; The cold-producing medium control valve is used for when described indoor set breaks down cutting off the flow of refrigerant of indoor set pipe arrangement automatically according to the signal of described indoor set fault detect portion.
Description of drawings
Fig. 1 is the structural representation of existing multi-air-conditioner;
Fig. 2 is the multi-air-conditioner flow of refrigerant schematic diagram according to the embodiment of the invention provided;
Fig. 3 is the composition structured flowchart according to multi-air-conditioner shown in Figure 2;
Fig. 4 is the circuit diagram of expression cold-producing medium control valve drive circuit;
Fig. 5 is for respectively installing the table that institute's output signal is put in order according to shown in Figure 4;
Fig. 6 is the flow chart according to the indoor set operation method of multi-air-conditioner shown in Figure 2;
Fig. 7 is for according to the employed distributor schematic diagram of the multi-air-conditioner that another embodiment of the present invention provided.
The specific embodiment
To most preferred embodiment provided by the present invention, described in detail below with reference to accompanying drawing.
As shown in Figures 2 and 3, by the multi-air-conditioner that one of embodiment of the invention provided, a plurality of indoor sets 20 that contain off-premises station 10 and be connected with off-premises station 10.Off-premises station 10 comprises: a plurality of compressors 11 are used for compressed refrigerant; Cross valve 12 is used to regulate the refrigerant flow direction of discharging from each compressor 11; Outdoor heat converter 13 is used for receiving and carries out heat exchange by each compressor 11 refrigerant compressed and with extraneous air; Outdoor fan 14 is used for to outdoor heat converter 13 air draft by force; Outdoor fan motor 15 is used for turning cell external fan 14.
In addition, off-premises station 10 also comprises: regulate opening when closing heating operation during refrigerating operaton so that the outdoor motor-driven valve 16 that cold-producing medium expands; Only make the circuitous detection valve 17 of cold-producing medium when the refrigerating operaton with outdoor motor-driven valve 16 is set up in parallel; Be used for cold-producing medium is transferred to gaseous state the electric storage means 18 (Accumulator) of compressor 11; The outer machine chip 19 (Microcomputer) that control off-premises station 10 each device and indoor set chip 24 carry out data communication.
In addition, indoor set 20 comprises and is used for indoor heat converter 21 that the room air that sucks is carried out heat exchange; Suck room air from the outside of indoor set 20, through being discharged to the indoor fan 22 of indoor set outside behind the indoor heat converter 21 again; The motor 23 that is used for turning cell internal fan 22; Each device of control indoor set 20 and the indoor set chip 24 that carries out data communication with off-premises station chip 19.
In addition, be connected the pipe arrangement of indoor heat converter 21, be provided for the indoor motor-driven valve 25 of swell refrigeration agent during refrigerating operaton on the pipe arrangement of suction cold-producing medium; And on the pipe arrangement of the cold-producing medium that the indoor heat converter 21 that flows during refrigerating operaton is discharged cold-producing medium control valve 26 is set, be used for that indoor set 20 self breaks down or indoor set 20 and off-premises station 10 between when communication abnormality takes place, regulate flowing of indoor heat converter inner refrigerant automatically or by the control command of indoor set chip 24.
As shown in Figure 4, the drive unit of cold-producing medium control valve comprises: be used to switch on or off the valve relay 31 of cold-producing medium control valve 26 power supplys, the NAND gate (NAND) 32 that is connected with valve relay 31, the working state signal of indoor set chip 24 be transferred to the state-detection portion 33 of NAND gate (NAND).
Valve relay 31 is that low level is effective, is opened during NAND gate 32 (NAND) output low level signal and connects the power supply of cold-producing medium control valve 26; Be closed during NAND gate 32 (NAND) output high level signal and prevent that cold-producing medium control valve 26 from connecting power supplys.At this moment, cold-producing medium control valve 26 cuts off the electricity supply and then cuts out if connecting power supply then opens.
During indoor set chip 24 operate as normal, by port one output some cycles square wave to chip status test section 33, and square wave that can not generating period when fault is arranged.In addition, chip detection portion 33 then exports high level signal if receive the periodicity square wave of the port one output of indoor set chip 24; Do not receive then output low level signal of periodicity square wave.
In two inputs of NAND gate 32 (NAND), an input receives the working state signal that transmits from chip status test section 33, and the valve relay that another input receives by port 2 transmission of indoor set chip 24 drives signal.And the signal that NAND gate 32 (NAND) is exported is input to the replacement end of indoor set chip 24.
As shown in Figure 5, indoor set chip 24 is working properly, and indoor set chip 24 is communicated to chip status test section 33 by port one with the periodicity square wave, chip status test section 33 output high level signals (H).At this moment, the indoor set chip is in order to open cold-producing medium control valve 26, the high level signal (H) of port 2 output energy driver's valve relays, then NAND gate 32 (NAND) output low level signal (L).If NAND gate 32 (NAND) output low level signal (L) is then connected valve relay 31 and applied power supply for the cold-producing medium control valve, open cold-producing medium control valve 26 thus.
On the contrary, indoor set chip 24 is in order to close cold-producing medium control valve 26, the low level signal (L) of port 2 output energy driver's valve relays, and NAND gate 32 this moment (NAND) output high level signal (H).If NAND gate 32 (NAND) output high level signal (H), then stop valve relay 31 applies power supply for cold-producing medium control valve 26, closes cold-producing medium control valve 26 thus.
In addition, when indoor set chip 24 breaks down, can not be by the port one of indoor set chip 24 to chip status test section 33 transmission periodicity square waves, chip status test section 33 output low level signals (L).Chip status test section 33 output low level signals (L), it is irrelevant that then NAND gate 32 (NAND) is exported the input signal of high level signal (H) and other terminals all the time.And NAND gate 32 (NAND) output high level signal (H), then shut off valve relay 31 and cut off the power supply of cold-producing medium control valve 26 cuts out cold-producing medium control valve 26.
Have again, during the abnormity of power supply of indoor set 20, cut off the power supply of cold-producing medium control valve 26 and close cold-producing medium control valve 26.
To Fig. 2 and multi-air-conditioner shown in Figure 3, the operation method when between its indoor set 20 and the off-premises station 10 communication abnormality taking place is described with reference to Fig. 6.If cold-producing medium control valve 26 is then closed in 24 work undesired (40) of indoor set chip as mentioned above automatically, to prevent having cold-producing medium (54) to flow in the out of order indoor set 20.
On the contrary, if indoor set chip operation 24 is normal, judge and having communicated by letter of indoor set 10 no abnormal (42).Then return with off-premises station 10 no communication abnormalities, have communication abnormality then to stop the operation of respective chambers machine 20 with indoor set 10, and confirm the method for operation (44) before operation stops.
Then, judge that the method for operation of moving the indoor set 20 before stopping is cooling operation mode (46).If the method for operation before operation stops is a cooling operation mode, cold-producing medium flows with the direction of indoor motor-driven valve 25 → indoor heat converter 21 → cold-producing medium control valve 26, so motor-driven valve 25 makes it cut out 48 in the first control room, after fixing time, process institute closes cold-producing medium control valve 26 (50).At this moment, in order to close cold-producing medium control valve 26, the port 2 of indoor set chip 24 sends low valve relay and drives signal, and therefore chip status test section 33 closes cold-producing medium control valve 26 as shown in Figure 5 with working state signal output high level signal.And, in the close chamber of elder generation the wait of motor-driven valve 25 back fixed time, close cold-producing medium control valve 26 again, before closing cold-producing medium control valve 26, give the time of indoor heat converter 21, prevent residual cold-producing medium in the indoor heat converter 21 with this so that residual refrigerant flows.
Have, if at the unusual indoor set 20 of (46) phase communication, the method for operation before its operation stops is not a cooling operation mode again, judges that then the method for operation of the indoor set 20 before operation stops is heating operation mode (56).If the method for operation before operation stops is the heating operation mode, cold-producing medium flows with the direction of cold-producing medium control valve 26 → indoor heat converter 21 → indoor motor-driven valve 25, so, close cold-producing medium control valve 26 earlier, pass through after fixed time in (58) control room motor-driven valve 25 make it close (60).Because close cold-producing medium control valve 26 earlier and wait for fixed time, motor-driven valve 25 close chamber in again, the situation during at this moment with refrigerating operaton is identical, can prevent residual cold-producing medium in the indoor heat converter 21.Indoor set 20 inner refrigerants that break down flow and are cut off by aforesaid method, but 20 of the indoor sets of all the other operate as normal are kept original running status (52).
If (56) the stage indoor set method of operation is not the heating operation mode, the indoor set method of operation before then operation stops is the air draft method of operation or waits for the method for operation that this moment, indoor motor-driven valve 25 cut out, therefore only closed cryogen control valve 26 (62).The air draft method of operation is not carried out heat exchange at indoor heat converter 21, and drive chamber's internal fan 23 makes room air be in recurrent state.Wait for the method for operation, indoor set 20 is in closed condition and has only indoor set chip 24 to be in the state of connection.
Fig. 6 illustrates the situation when having communication abnormality between indoor set 20 and the off-premises station 10, but moreover, when indoor set chip 24 detects the operation irregularity of indoor motor-driven valve 25, also closes cold-producing medium control valve 26 by the control valve relay drive signal.
As shown in Figure 7,, the inside of indoor set 20 can be arranged on, as shown in Figure 2, also distributor 70 can be arranged at each indoor motor-driven valve 25 and cold-producing medium control valve 26 of multi-air-conditioner shown in Figure 2.At distributor 70, the pipe arrangement branch of indoor set high-pressure side and low-pressure side, and indoor motor-driven valve 25 and cold-producing medium control valve 26 are set on each pipe arrangement of branch of institute.
Other parts beyond Fig. 7 changes part are identical with multi-air-conditioner shown in Figure 2, indoor set chip 24 break down or off-premises station 10 and indoor set 20 between when having system such as communication abnormality part generation problem, pairing action is suitable for the explanation as Fig. 2 to Fig. 6 too.
Thus, when indoor set chip 24 power supplys unusual, that indoor set 20 applies have the communication abnormality that reaches unusually between off-premises station and the indoor set, cut-out flows in the flow of refrigerant of unusual indoor set, and remaining indoor set operate as normal is interrupted to prevent the total system running.
In sum; the part indoor set that the present invention works as multi-air-conditioner breaks down; cut-out flows in the flow of refrigerant of this indoor set, keeps the continuation operation of normal operation indoor set, comes protection system thus and the cooling and warming efficient of all systems is kept certain level.
Claims (17)
1. multi-air-conditioner, a plurality of indoor sets that comprise at least one off-premises station and be connected side by side with indoor set chip with described at least one off-premises station, each indoor set comprises:
Indoor set fault detect portion is used to detect the fault of described indoor set;
The cold-producing medium control valve is used for when described indoor set breaks down cutting off flowing of indoor set pipe arrangement cold-producing medium automatically according to the signal of described indoor set fault detect portion.
2. multi-air-conditioner according to claim 1 is characterized in that described fault detect portion is the chip status test section of machine chip fault in the sensing chamber.
3. multi-air-conditioner according to claim 2 is when is characterized in that described indoor set chip is operate as normal, to the clock signal of described chip status test section output some cycles; Described chip status test section is if reception from the clock signal of the some cycles of described indoor set chip, is then exported high level signal; Described chip status test section is as if the clock signal that does not receive from the some cycles of described indoor set chip, then output low level signal.
4. multi-air-conditioner according to claim 2, it is characterized in that described cold-producing medium control valve connects the valve relay that is used to switch on or off described cold-producing medium control valve power supply, described valve relay is connected with door, and this reception drives signal by the described indoor set chip operation status signal of described chip status test section output with by the valve relay that described indoor set chip is exported, and drives signal output different value according to described working state signal and described valve relay.
5. multi-air-conditioner according to claim 4 is characterized in that: described valve relay is effective low level, and described door is a NAND gate; When described indoor set chip broke down, described NAND gate was exported high level signal and is closed described valve relay because of the input low level signal, and made described cold-producing medium control valve not close described cold-producing medium control valve because of there being electric current to flow.
6. multi-air-conditioner according to claim 2, it is characterized in that described indoor set comprises the motor-driven valve that is used for the swell refrigeration agent on the pipe arrangement that is located at heat exchanger one side, and described cold-producing medium control valve is located on the pipe arrangement that is connected in described heat exchanger indoor unit opposite side.
7. multi-air-conditioner according to claim 6 is characterized in that: the valve relay that is provided for switching on or off described cold-producing medium control valve power supply on the described cold-producing medium control valve; Described valve relay is connected with door, and this reception drives signal by the level signal of described control part output with by the valve relay that described control part is exported, and drives signal output different value according to described level signal and described valve relay.
8. multi-air-conditioner according to claim 7 is characterized in that: described valve relay is effective low level, and described door is a NAND gate; If under the described control part normal condition with described indoor set generation communication abnormality, then described control part drives signal to described NAND gate output high level working state signal and low level valve relay, and described NAND gate output high level signal, described valve relay are closed, and cause described cold-producing medium control valve no current flows and close the cold-producing medium control valve.
9. multi-air-conditioner according to claim 1, it is characterized in that when the fault of described indoor set for and described off-premises station between take place communication abnormality the time, described cold-producing medium control valve cuts off flowing of cold-producing medium in the indoor set pipe arrangement according to the control command of described indoor set chip.
10. multi-air-conditioner according to claim 1 is characterized in that described cold-producing medium control valve opens during power supply automatically for supply, and closes automatically when cutting off the electricity supply.
11. multi-air-conditioner, the a plurality of indoor sets and the distributor that have at least one off-premises station, be connected side by side with described at least one off-premises station, this distributor has a plurality of motor-driven valves, and a plurality of motor-driven valve is used to expand and flows in the cold-producing medium of described a plurality of indoor sets, it is characterized in that:
Described distributor also has a plurality of cold-producing medium control valves with described indoor set equal number, be used for when described indoor set break down or described indoor set and off-premises station between when communication abnormality takes place, cut off the flow of refrigerant in the improper indoor set.
12. multi-air-conditioner according to claim 11 is characterized in that: the valve relay that is provided for switching on or off described cold-producing medium control valve power supply on the described cold-producing medium control valve; Described valve relay is connected with door, and this receives the working state signal of described control part and drives signal by the valve relay that described control part is exported, and drives signal output different value according to described working state signal and described valve relay.
Reach a plurality of indoor sets that are connected side by side with described off-premises station 13. the indoor set operation method of a multi-air-conditioner, described multi-air-conditioner have off-premises station, it is characterized in that:
Judge whether described a plurality of indoor set breaks down;
If have at least an indoor set to break down in described a plurality of indoor set, then cut off and flow to respective chamber/chambers
The flow of refrigerant of interior machine, and remaining indoor set operate as normal.
14. the indoor set operation method of multi-air-conditioner according to claim 13 is characterized in that:
Judge fault that described a plurality of indoor set takes place whether be and described off-premises station between the communication abnormality that takes place;
If communication abnormality is arranged, then stop described indoor set operation.
15. the indoor set operation method of multi-air-conditioner according to claim 14 is characterized in that:
After stopping the operation of described indoor set, confirm that described operation stops the method for operation before;
Close by different order according to the described method of operation and to be connected motor-driven valve and the described cold-producing medium control valve that is provided with on described heat exchanger indoor unit two side lines.
16. the indoor set operation method of multi-air-conditioner according to claim 15, it is characterized in that described motor-driven valve is that benchmark is arranged on the pipe arrangement that is connected described heat exchanger suction side for the refrigerating operaton with described indoor set, when if the indoor set method of operation of described operation before stopping is cooling operation mode, heat exchanger then cuts out described motor-driven valve earlier, cuts out the cold-producing medium control valve again.
17. the indoor set operation method of multi-air-conditioner according to claim 16 is characterized in that:, then close the cold-producing medium control valve earlier, close described motor-driven valve again if the indoor set method of operation of described operation before stopping is the heating operation mode; If the indoor set method of operation before described operation stops is air draft mode or waiting mode, then close described cold-producing medium control valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040048224A KR20050122625A (en) | 2004-06-25 | 2004-06-25 | A multi air conditioner system and a driving method of indoor unit |
| KR48224/04 | 2004-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1712840A CN1712840A (en) | 2005-12-28 |
| CN100340819C true CN100340819C (en) | 2007-10-03 |
Family
ID=35718566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100539234A Expired - Fee Related CN100340819C (en) | 2004-06-25 | 2005-03-14 | Multiple air conditioner system and operation of its indoor units |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20050122625A (en) |
| CN (1) | CN100340819C (en) |
| IT (1) | ITRM20050106A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102150441B1 (en) * | 2013-07-26 | 2020-09-01 | 엘지전자 주식회사 | Air conditioner |
| CN105091201A (en) * | 2014-05-15 | 2015-11-25 | 广东美的暖通设备有限公司 | Multi-connected air conditioner system and control method thereof |
| CN104154605B (en) * | 2014-08-20 | 2017-02-15 | 中国扬子集团滁州扬子空调器有限公司 | Control circuit of variable frequency air conditioner |
| CN104154604B (en) * | 2014-08-20 | 2017-01-18 | 中国扬子集团滁州扬子空调器有限公司 | Outdoor unit control circuit of variable frequency air conditioner |
| CN109798625A (en) * | 2018-12-29 | 2019-05-24 | 珠海格力电器股份有限公司 | A kind of refrigerant recovering method, apparatus and air conditioner |
| KR102239648B1 (en) * | 2019-05-10 | 2021-04-13 | 주식회사 파세코 | A fan-motor control device for airconditioner of window type |
| JP6997392B2 (en) * | 2020-02-05 | 2022-02-04 | ダイキン工業株式会社 | Air conditioning system |
| CN114811861B (en) * | 2022-03-30 | 2023-11-24 | 青岛海尔空调电子有限公司 | Central air conditioner control method and central air conditioner |
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- 2004-06-25 KR KR1020040048224A patent/KR20050122625A/en not_active Application Discontinuation
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- 2005-03-14 CN CNB2005100539234A patent/CN100340819C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| KR20050122625A (en) | 2005-12-29 |
| CN1712840A (en) | 2005-12-28 |
| ITRM20050106A1 (en) | 2005-12-26 |
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