CN101595618A - Air regulator and control method thereof - Google Patents
Air regulator and control method thereof Download PDFInfo
- Publication number
- CN101595618A CN101595618A CNA2006800492495A CN200680049249A CN101595618A CN 101595618 A CN101595618 A CN 101595618A CN A2006800492495 A CNA2006800492495 A CN A2006800492495A CN 200680049249 A CN200680049249 A CN 200680049249A CN 101595618 A CN101595618 A CN 101595618A
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- Prior art keywords
- power
- phase
- power source
- air regulator
- factor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/0005—Components or details
- B05B11/0027—Means for neutralising the actuation of the sprayer ; Means for preventing access to the sprayer actuation means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1001—Piston pumps
- B05B11/1009—Piston pumps actuated by a lever
- B05B11/1011—Piston pumps actuated by a lever without substantial movement of the nozzle in the direction of the pressure stroke
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1042—Components or details
- B05B11/1059—Means for locking a pump or its actuation means in a fixed position
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Control Of Ac Motors In General (AREA)
- Air Conditioning Control Device (AREA)
- Rectifiers (AREA)
Abstract
Disclose a kind of air regulator and control method thereof, it improves the power factor of air regulator by the phase difference of minimizing between the voltage and current of the power source of compressor input; And a kind of air regulator and control method thereof, it strengthens harmonic component by the electric current to the compressor input sine wave.In air regulator and control method thereof, the power factor of three phase power source is by phase compensation and be imported into rectifier, thereby makes the voltage and current of the power source that applies to compressor become same phase.Further, with the form input current of sine wave,, and remove the harmonic components that occurs so that improve the power factor of air regulator.In addition, the removal of harmonic component has strengthened the Performance And Reliability of product in the power source of the improvement of the power factor of air regulator and appearance.
Description
Technical field
The present invention relates to air regulator and control method thereof.More specifically, the present invention relates to such air regulator and control method thereof, this air regulator comprises power-factor compensator, this power-factor compensator is in each end of the three phase power source that applies to transducer, and by coming the compensation power factor to compressor input sine wave electric current and improving harmonic wave.
Background technology
Usually, air regulator is provided for refrigeration, heating or air conditioning, and is mounted with the air to indoor discharging refrigeration/heating, and purifies the air of a room so that comfortable indoor environment to be provided to people.
Such air regulator is divided into indoor unit of being made up of indoor heat converter and the outdoor unit of being made up of compressor and outdoor heat converter.Air regulator moves by the power source of control to supplies such as compressors.
On the other hand, traditional air regulator comprises power supply, electromagnetic switch, rectifier, reactor, DC transmission part (link section) and inverter.The power source of power supply supply predetermined amplitude.Inverter converts direct voltage the alternating voltage of constant voltage or frequency to, and alternating voltage is supplied to compressor.
When from the power source of power supply input and conversion during, apply electric current to the motor of the compressor that will move greater than the voltage of DC transmission part.
Yet, as described earlier, because traditional air regulator only applies and the corresponding electric current of the direct current power source that is equal to or greater than the voltage that applies to the DC transmission part, so increased phase difference between the voltage and current to the input power source of compressor supply by inverter.
That is, when inverter when compressor motor applies the AC power source, the AC power source with voltage and current ripple as shown in Figure 1 is imported into compressor motor.
At this moment, when will to the ripple of the voltage of motor input with to the phase of wave of the electric current of its input relatively the time, the voltage of input is applied in, then electric current flows.Therefore, to the authentic and valid power of the power source of the compressor of air regulator input be reduced and voltage and current between phase difference as many, thereby cause the power factor of air regulator significantly to worsen.
Summary of the invention
Technical problem
Therefore, developed the present invention so that solve the problems referred to above that occur in the prior art, and the purpose of this invention is to provide a kind of air regulator and control method thereof, it improves the power factor of air regulator by the phase difference of minimizing between the voltage and current of the power source of compressor input.
Second purpose of the present invention provides a kind of air regulator and control method thereof, and it strengthens harmonic component by the electric current to the compressor input sine wave.
Technical scheme
In order to reach this purpose, according to a first aspect of the invention, provide a kind of air regulator, comprising: power supply unit (section) is used to receive three phase power source; Voltage wave sensor is used for the voltage wave of the three phase power source that the described power supply unit of sensing received; Power-factor compensator, it is connected to described power supply unit, is used to compensate the power factor of described three phase power source; And controller, be used to control the operation of described power-factor compensator, so that compensate described power factor according to voltage wave from described voltage wave sensor.
According to a second aspect of the invention, provide a kind of air regulator, having comprised: power supply unit; Voltage wave sensor is used for the voltage wave of the three phase power source that the described power supply unit of sensing received; Rectifier, the three phase power source that is used for described power supply unit is received is carried out rectification; The direct current transmission parts are used for the three phase power source based on the rectification of described rectifier institute, generate the direct current power source of predetermined amplitude; Inverter is used for converting described direct current power source to the AC power source, and described AC power source is supplied to compressor motor; Power-factor compensator, it is connected to described power supply unit, is used to compensate the power factor of described three phase power source; And controller, be used for according to controlling the operation of described power-factor compensator from the voltage wave of described voltage wave sensor, so that apply power source to described compressor motor with improved power factor.
According to a third aspect of the invention we, provide a kind of method that is used to control air regulator, may further comprise the steps: by the voltage wave of voltage wave sensor sensing to the input of three phase mains parts; And the power factor that compensates input power according to voltage wave from described voltage wave sensor input.
Beneficial effect
According to as top proposed air regulator of the present invention, the power factor of three phase power source is by phase compensation and be imported into rectifier, thereby makes the voltage and current of the power source that applies to compressor become same phase.Further, with the form input current of sine wave,, and remove the harmonic components that occurs so that improve the power factor of air regulator.
In addition, as mentioned above, the removal of harmonic component has strengthened the Performance And Reliability of product in the improvement of the power factor of air regulator and the power source of appearance.
Description of drawings
In conjunction with the accompanying drawings, from following detailed description, above-mentioned and other purpose of the present invention, feature and advantage will be more obvious, wherein:
Fig. 1 is the curve chart that illustrates according to the ripple in the compressor power input source in the air regulator of prior art;
Fig. 2 illustrates the view of arranging according to the control of air regulator of the present invention;
Fig. 3 is the curve chart that illustrates about the switch mode of control signal, and described control signal is applied to its power-factor compensator from the controller according to air regulator of the present invention; And
Fig. 4 is the curve chart that illustrates according to the ripple in the compressor power input source in the air regulator of the present invention.
Embodiment
Hereinafter, with preferred embodiments of the present invention will be described in detail with reference to the annexed drawings.Run through drawing and description, the identical identical key element of Reference numeral indication.In the following description of the present invention, being incorporated into this known function and the detailed description of configuration will be omitted, to avoid making theme of the present invention unclear.
Fig. 2 illustrates the view of arranging according to the control of air regulator of the present invention.
With reference to figure 2, air regulator according to the present invention comprises power supply unit 10, voltage wave sensor 20, rectifier 40, reactor 50, DC transmission part 60, inverter 70 and compressor motor 80.Power supply unit 10 receives three phase power source.The voltage wave of the three phase power source that voltage wave sensor 20 sensing power supply units are received.The power source that rectifier 40 rectification three phase mains parts 10 are received.DC transmission part 60 generates the direct current power source of predetermined amplitude based on the three phase power source of 40 rectifications of rectifier.Inverter 70 converts direct current power source to the AC power source, and the AC power source is supplied to compressor.
Air regulator further comprises power-factor compensator 30 and controller 90.Power-factor compensator 30 is connected to the front end of rectifier 40, and compensation is from the power factor of the three phase power source of power supply unit 10.Controller 90 comes power controlling factor compensator 30 and inverter 70 according to the sensing result of voltage wave sensor 20.
More specifically, voltage wave sensor 20 is connected to and neutral line N in the three phase terminals in the power supply unit 10, and the voltage wave of the power source of sensing input.
Here, voltage wave sensor 20 can be connected in the three phase terminals of power supply unit 10 one.Although voltage wave sensor 20 is connected to the R phase terminal, it can be connected to S phase terminal or T phase terminal.
In addition, the voltage wave in the AC power source of voltage wave sensor 20 sensings input, and provide it to controller 90.
On the other hand, power-factor compensator 30 is connected to power supply unit 10 and rectifier 40, and the control command according to controller 90 compensates from the power factor of the power source of power supply unit 10 inputs, and the power source that its power factor is compensated is supplied to rectifier 40.
Further, power-factor compensator 30 comprises at least one reactor L1 to L3 and at least one switch element Q1 to Q3.
More specifically, in power-factor compensator 30, each among each among reactor L1, L2 and the L3 and switch element Q1, Q2 and the Q3 be connected to power supply unit 10 each mutually, and according to the control signal operation that comes self-controller 90.Here, reactor L1, L2 and L3 are connected in series to power supply unit 10 with respect to rectifier 40.Form contrast therewith, switch element Q1, Q2 and Q3 are parallel-connected to rectifier 40.
That is the first reactor L1 is connected to the first central phase terminal R of three phase terminals of power supply unit 10, and the first switch element Q1 is connected to the first reactor L1.
Further, the second reactor L2 and second switch element Q2 are connected to the second phase terminal S, and the 3rd reactor L3 and the 3rd switch element Q3 are connected to third phase position end T.
The drain electrode of first to the 3rd switch element Q1 to Q3 is connected to each reactor L1, L2 and L3, and its source electrode then is connected to the neutral line N of power supply unit 10.
Here, the grid of first to the 3rd switch element Q1 to Q3 is connected to controller 90.According to the control signal of coming self-controller 90, first to the 3rd switch element Q1 to Q3 is switched on/disconnects and carry out handover operation, so that the power factor of the three-phase of offset supply parts 10.
On the other hand, rectifier 40 is composed of a plurality of bridge diodes, and receives also rectification from the power source of power-factor compensator 30, and makes the power source of 50 rectifications of reactor be imported into DC transmission part 60.
DC transmission part 60 receives the power source of rectifier 40 and makes it level and smooth, and the output direct current power source.Here, DC transmission part 60 comprises at least one the level and smooth capacitor of power source that is used to make input.
Inverter 70 bases come the control signal of self-controller 90 to be driven, and will convert the AC power source through the direct current power source that rectification peace slips over to, and the AC power source is supplied to compressor motor 80.
By aforementioned arrangement, when power supply unit when voltage wave sensor 20 applies the AC power source, the voltage wave in voltage wave sensor 20 sensing AC power sources also provides it to controller 90.Therefore, controller 90 bases generate control signal with power controlling factor compensator 30 from the voltage wave in the AC power source of voltage wave sensor 20, and control signal is applied to power-factor compensator 30.
At length, controller 90 is based on the voltage level of judging from the voltage wave of the sensing of voltage wave sensor 20 from the power source of power supply unit 10, thereby and is operatively connected to power-factor compensator 30 operations of each phase terminal of power supply unit 10.
That is the input voltage ripple of the power source of a phase terminal of the power supply unit 10 of 20 sensings of controller 90 analytical voltage wave sensors is to judge its voltage level.Controller 90 is applied to control signal each switch element Q1, Q2 and the Q3 that wants driven power-factor compensator 30.
Therefore, switch element Q1, Q2 and Q3 move under the control of controller 90, so that the three-phase of power supply unit 10 is carried out power factor compensation.
Next step, the power source that 40 pairs of power factors of rectifier are modified carries out rectification, and the power source of rectification is supplied to DC transmission part 60.Therefore, DC transmission part 60 generate have predetermined amplitude direct current power source with Driven Compressor, and direct current power source is supplied to compressor motor 80 by inverter 70.
Fig. 3 is the curve chart that illustrates about the switch mode of control signal, and described control signal is applied to its power-factor compensator from the controller according to air regulator of the present invention.
In Fig. 3, LD represents to be used to show the curve of the reference voltage that is used for switching controls, and SI is the voltage wave of 20 sensings of voltage wave sensor, and SO then is the switch-over control signal of slave controller 90 to power-factor compensator 30.
With reference to figure 3, controller 90 is compared the voltage level of the voltage wave SI of 20 sensings of voltage wave sensor with reference voltage LD.When the voltage level of voltage wave SI during greater than reference voltage LD, controller 90 applies control signal SO to power-factor compensator 30, so that the switch element of driving power factor compensator 30.
At this moment, controller 90 is applied to the control signal SO of aforesaid switch mode one in the three phase terminals of the power supply unit 10 that is connected with voltage wave sensor 20, so that the switch element of driving power factor compensator 30.
And then, because the three phase power source of power supply unit 10 has the phase differences of 120 degree, so controller 90 will have each switch element that the control signals of the switch mode of 120 degree phase differences are applied to the power-factor compensator 30 that is connected with the phase terminal of power supply unit 10 except the phase terminal that is connected to voltage wave sensor 20.
That is controller 90 will be compared with reference voltage LD from the voltage level of the voltage wave SI of the first phase terminal R sensing of power supply unit 10 and input, and will be applied to the first switch element Q1 as the control signal SO with switch mode that early illustrates.
In addition, controller 90 will be applied to the second switch element Q2 that is connected with the second phase terminal S of power supply unit 10 with the control signals of switch mode that control signal SO have 120 degree phase differences.
In addition, controller 90 applies control signal to the 3rd switch element Q3, so that it can carry out handover operation, wherein, the control signal that is applied has 240 phase differences of spending with the control signal that is applied to the first switch element Q1, and has 120 phase differences of spending with the control signal that is applied to second switch element Q2.
As from seeing the aforementioned description, voltage level and phase place according to the power source of importing, each switch element Q1 to Q3 of power-factor compensator 30 that is connected to the three phase terminals of power supply unit 10 is switched on/disconnects, and can carry out power factor compensation mutually to three inputs of power source.This feasible power source with power factor of enhancing is supplied to compressor.
Fig. 4 is the curve chart that illustrates according to the ripple in the compressor power input source in the air regulator of the present invention.
With reference to figure 4, one voltage wave in the three-phase in the air regulator sensing power supply unit, and based on the switching of sensed result power controlling factor compensator 30 is so that electric current flows according to the voltage wave of sensing.So, the phase difference between the voltage and current of power source just significantly reduces, thereby and voltage LV1 and electric current LI1 with same phase be applied to compressor motor 80.
In addition, one voltage wave in the three-phase in the air regulator sensing power supply unit, and each switch element to power-factor compensator 30 applies control signal, to have the phase difference of 120 degree each other, so that be supplied to the current wave of the power source of compressor to have sinusoidal wave form.
Therefore, the power factor that is applied to the power source of compressor is enhanced, and has improved the harmonic component that generates by the sinusoidal wave electric current that flows.
Industrial applicibility
According to air regulator of the present invention, the voltage and current of the power source that applies to compressor is by all Weighing apparatus, and with the form input current of sine wave. Therefore, the power factor of air regulator is modified, And the harmonic component of the generation of power source is removed, thereby has fabulous industrial applicibility.
Claims (16)
1. air regulator comprises:
Power supply unit is used to receive three phase power source;
Voltage wave sensor is used for the voltage wave of the three phase power source that the described power supply unit of sensing received;
Power-factor compensator, it is connected to described power supply unit, is used to compensate the power factor of described three phase power source; And
Controller is used to control the operation of described power-factor compensator, so that compensate described power factor according to the voltage wave from described voltage wave sensor.
2. air regulator as claimed in claim 1, wherein, described voltage wave sensor is connected to and the neutral line in the three phase terminals of described power supply unit.
3. air regulator as claimed in claim 1, wherein, by the described power factor of the phase compensation of described power supply unit.
4. air regulator as claimed in claim 1, wherein, described power-factor compensator comprises at least one reactor and at least one switch element.
5. air regulator as claimed in claim 4, wherein, described reactor and described switch element are connected to each phase place of described three phase power source.
6. air regulator as claimed in claim 3 further comprises rectifier, and rectification is carried out in the AC power source that is used for described power supply unit is received,
Wherein, described reactor is connected to described rectifier, and described switch element is connected in series to described reactor and is parallel-connected to described rectifier.
7. air regulator as claimed in claim 3, wherein, the grid of described switch element, drain electrode and source electrode are connected respectively to described controller, described reactor and the described neutral line.
8. air regulator as claimed in claim 3, wherein, described controller will be compared with reference voltage from the voltage level of the voltage wave of described voltage wave sensor, and to being equal to or greater than the level compensation power factor of described reference voltage.
9. air regulator as claimed in claim 8, wherein, the control signal with predetermined switch mode of 120 degree phase differences is applied to each switch element of the three-phase that is connected to power source.
10. air regulator comprises:
Power supply unit;
Voltage wave sensor is used for the voltage wave of the three phase power source that the described power supply unit of sensing received;
Rectifier is used for the power source that described three phase mains parts are received is carried out rectification;
The direct current transmission parts are used for generating based on the three phase power source of described rectifier institute rectification the direct current power source of predetermined amplitude;
Inverter is used for converting described direct current power source to the AC power source, and described AC power source is supplied to compressor motor;
Power-factor compensator, it is connected to described power supply unit, is used to compensate the power factor of described three phase power source; And
Controller is used for according to controlling the operation of described power-factor compensator from the voltage wave of described voltage wave sensor, so that apply the power source with improved power factor to described compressor motor.
11. air regulator as claimed in claim 10, wherein, described power supply unit receives three phase power source, and described power-factor compensator is connected to each phase.
12. air regulator as claimed in claim 10, wherein, described power-factor compensator comprises reactor and switch element, and described reactor is connected to described rectifier, and described switch element is connected in series to described reactor and is parallel-connected to described rectifier.
13. a method that is used to control air regulator may further comprise the steps:
By the voltage wave of voltage wave sensor sensing to the input of three phase mains parts; And
Compensate the power factor of input power according to voltage wave from described voltage wave sensor input.
14. method as claimed in claim 13 wherein, when the voltage level of the voltage wave of sensing is equal to or greater than reference voltage, compensates described power factor.
15. method as claimed in claim 13, wherein, by the described power factor of the phase compensation of described three phase mains parts.
16. method as claimed in claim 13, wherein, the power-factor compensator that is connected to the three-phase of power source moves to have the phase differences of 120 degree.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060007310 | 2006-01-24 | ||
| KR1020060007310A KR20070077631A (en) | 2006-01-24 | 2006-01-24 | Air conditioner enable to compensate for power factor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101595618A true CN101595618A (en) | 2009-12-02 |
Family
ID=38309614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800492495A Pending CN101595618A (en) | 2006-01-24 | 2006-12-06 | Air regulator and control method thereof |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1977172B1 (en) |
| KR (1) | KR20070077631A (en) |
| CN (1) | CN101595618A (en) |
| WO (1) | WO2007086647A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102683A (en) * | 2019-12-27 | 2020-05-05 | 上海三菱电机·上菱空调机电器有限公司 | Power factor improving method and system and control method of variable frequency air conditioner |
| CN111981637A (en) * | 2020-09-01 | 2020-11-24 | 珠海格力电器股份有限公司 | Air conditioner short circuit abnormity detection method, computer device and computer readable storage medium |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010021591A1 (en) * | 2008-08-21 | 2010-02-25 | Aztech Technologies Pte Ltd | Power factor correcting arrangement and method of correcting power factor |
| KR101243637B1 (en) * | 2010-10-25 | 2013-03-14 | 이호일 | Device for switching blower motor for vehicles |
| KR102178489B1 (en) * | 2019-01-02 | 2020-11-13 | 엘지전자 주식회사 | Power converting apparatus and air conditioner including the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2513168C3 (en) * | 1975-03-25 | 1978-06-08 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Device for reactive power compensation in a three-phase network |
| JPH08196077A (en) | 1994-11-18 | 1996-07-30 | Toshiba Corp | Power converter and air-conditioner employing it |
| DE69725069D1 (en) | 1996-07-16 | 2003-10-30 | Hitachi Ltd | Power supply device for an air conditioning system |
-
2006
- 2006-01-24 KR KR1020060007310A patent/KR20070077631A/en not_active Application Discontinuation
- 2006-12-06 EP EP06823948.2A patent/EP1977172B1/en active Active
- 2006-12-06 CN CNA2006800492495A patent/CN101595618A/en active Pending
- 2006-12-06 WO PCT/KR2006/005241 patent/WO2007086647A2/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102683A (en) * | 2019-12-27 | 2020-05-05 | 上海三菱电机·上菱空调机电器有限公司 | Power factor improving method and system and control method of variable frequency air conditioner |
| CN111981637A (en) * | 2020-09-01 | 2020-11-24 | 珠海格力电器股份有限公司 | Air conditioner short circuit abnormity detection method, computer device and computer readable storage medium |
| CN111981637B (en) * | 2020-09-01 | 2021-11-19 | 珠海格力电器股份有限公司 | Air conditioner short circuit abnormity detection method, computer device and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1977172B1 (en) | 2019-09-18 |
| EP1977172A4 (en) | 2017-11-22 |
| WO2007086647A3 (en) | 2009-05-14 |
| KR20070077631A (en) | 2007-07-27 |
| WO2007086647A2 (en) | 2007-08-02 |
| EP1977172A2 (en) | 2008-10-08 |
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Application publication date: 20091202 |