CN108332342B - Heating operation control method for air conditioner - Google Patents
Heating operation control method for air conditioner Download PDFInfo
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- CN108332342B CN108332342B CN201710582114.5A CN201710582114A CN108332342B CN 108332342 B CN108332342 B CN 108332342B CN 201710582114 A CN201710582114 A CN 201710582114A CN 108332342 B CN108332342 B CN 108332342B
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- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000010438 heat treatment Methods 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 39
- 230000007704 transition Effects 0.000 claims 1
- 238000013517 stratification Methods 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/17—Speeds
- F25B2700/171—Speeds of the compressor
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/17—Speeds
- F25B2700/173—Speeds of the evaporator fan
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a heating operation control method of an air conditioner, which comprises the following steps: the air conditioner is heated and operated, the real-time rotating speed of the indoor fan is obtained and compared with the reference rotating speed; executing a comfort control process after the real-time rotating speed meets the comfort control triggering condition; the comfort control trigger condition includes at least: the real-time rotating speed is not greater than the reference rotating speed; the comfort control process includes at least: and controlling the indoor fan to operate at a target rotating speed higher than the real-time rotating speed. The invention can solve the problem of poor heating comfort caused by layering of indoor air temperature in the prior art during heating.
Description
Technical Field
The invention belongs to the technical field of air conditioning, particularly relates to control of an air conditioner, and more particularly relates to a heating operation control method of the air conditioner.
Background
In the prior art, when an air conditioner is operated for heating, the air conditioner is usually controlled according to the indoor temperature, and when the indoor temperature is close to the target temperature, the frequency of a compressor and the rotating speed of an indoor fan are both reduced. The rotating speed of the indoor fan is reduced, and the indoor air circulation speed is reduced. When the air conditioner runs for heating, the hot air blown out by the indoor unit has a small specific gravity, and floats upwards, so that after the air conditioner runs for a long time, the temperature of indoor air is seriously layered due to lack of circulation of the indoor air, the temperature of upper-layer air is high, the temperature of lower-layer air is low, and the main moving range of a human body is in a lower-layer space with low temperature, so that the heating comfort is not good.
Disclosure of Invention
The invention aims to provide a heating operation control method of an air conditioner, which solves the problem of poor heating comfort caused by layering of indoor air temperature in the heating process in the prior art.
In order to achieve the purpose, the heating operation control method provided by the invention is realized by adopting the following technical scheme:
a heating operation control method of an air conditioner, the method comprising:
the air conditioner is heated and operated, the real-time rotating speed of the indoor fan is obtained and compared with the reference rotating speed;
executing a comfort control process after the real-time rotating speed meets the comfort control triggering condition;
the comfort control trigger condition includes at least: the real-time rotating speed is not greater than the reference rotating speed;
the comfort control process includes at least: and controlling the indoor fan to operate at a target rotating speed higher than the real-time rotating speed.
The method as described above, the comfort control triggering condition further comprising: the duration that the real-time rotating speed is not more than the reference rotating speed reaches the reference time.
According to the method, the controlling the indoor fan to operate at the target rotating speed higher than the real-time rotating speed specifically comprises the following steps: and controlling the indoor fan to operate by taking the maximum rotating speed allowed by heating operation as a target rotating speed.
The method as described above, the comfort control process further comprising:
and adjusting the air guide angle of an air guide plate of the indoor unit so that the air guided by the air guide plate flows in the direction below the horizontal direction.
The method as described above, further comprising:
the air conditioner is heated and operated, and the real-time frequency of a compressor of the air conditioner is obtained;
the comfort control process further comprises: controlling the compressor to operate at a target frequency higher than the real-time frequency.
The method for controlling the compressor to operate at the target frequency higher than the real-time frequency specifically comprises the following steps: and controlling the compressor to operate with the maximum frequency allowed by the heating operation as a target frequency.
According to the method, timing is started when the comfort control process is started, the comfort control process is exited after the timing time reaches the preset time, and the judgment of the comfort control triggering condition is continuously executed.
In the method, after the comfort control process is exited, the air conditioner is switched to the running state before the comfort control process is entered.
The method as described above, further comprising:
the air conditioner is heated and operated, a real-time air guide angle of an air deflector of the indoor unit is obtained, and a deviation angle between the real-time air guide angle and a preset air guide angle of the air deflector is calculated; the preset air guide angle is the air guide angle of the air deflector when the air outlet volume of the air outlet of the indoor unit is maximum;
and determining the reference rotating speed according to the deviation angle and a preset reference rotating speed, so that the larger the deviation angle is, the larger the reference rotating speed is.
Preferably, when the deviation angle is 0 °, the reference rotation speed is the preset reference rotation speed.
Compared with the prior art, the invention has the advantages and positive effects that: according to the heating operation control method of the air conditioner, after the real-time rotating speed of the indoor fan is reduced to reach the comfort control triggering condition, a comfort control process is executed, and the indoor fan is controlled to operate at the target rotating speed higher than the real-time rotating speed; through the rotational speed of forcing rising indoor fan, can increase the air-out speed of indoor set air outlet through the rising of fan rotational speed for indoor circulation of air, effectively avoided because of the rotational speed reduces, circulation of air worsens and leads to the not good emergence of the not good problem of comfort of heating that the temperature layering appears in the indoor air when leading to heating.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a flowchart of an embodiment of a heating operation control method of an air conditioner according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, a flow chart of an embodiment of a heating operation control method of an air conditioner according to the present invention is shown.
As shown in fig. 1, the control method for implementing the heating operation of the air conditioner in the embodiment includes:
step 11: and the air conditioner is operated in a heating mode, and the real-time rotating speed of the indoor fan is obtained and compared with the reference rotating speed.
The real-time rotating speed of the indoor fan refers to the rotating speed of the indoor fan obtained according to a certain sampling frequency in the heating operation process of the air conditioner. The rotating speed of the indoor fan is controlled by the air conditioner controller, so that the controller can conveniently acquire the real-time rotating speed. The reference rotation speed is a rotation speed value reflecting whether the indoor air circulation is sufficient or not, and can be a fixed value which is known and stored in advance, or a value which is determined according to other real-time parameters and corresponds to the real-time rotation speed.
In some preferred embodiments, the reference rotation speed is determined according to a real-time wind guiding angle of an indoor unit wind deflector corresponding to the real-time rotation speed. Specifically, when the air conditioner is in heating operation, the real-time air guide angle of the air deflector of the indoor unit is also obtained. The air guide angle of the air guide plate is controlled by the air conditioner controller, so that the controller can conveniently acquire the real-time air guide angle of the air guide plate. And after the real-time air guide angle of the air guide plate of the indoor unit is obtained, calculating the deviation angle between the real-time air guide angle and the preset air guide angle of the air guide plate. The preset air guide angle is the air guide angle of the air guide plate when the air outlet volume of the indoor unit air outlet is maximum. For the air conditioner with a determined structure, the preset air guide angle is determined, can be stored in a memory of the controller in advance, and can be called at any time when in use. And then, determining a reference rotating speed according to the calculated deviation angle and a preset reference rotating speed, and enabling the reference rotating speed to be larger when the deviation angle is larger. The preset reference rotating speed is a preset fixed value, and can be called and used at any time in a pre-stored memory. The specific method for determining the reference rotating speed according to the deviation angle and the preset reference rotating speed can be various, as long as the reference rotating speed corresponding to the deviation angle can be obtained by correcting the reference rotating speed according to different deviation angles, and the larger the deviation angle is, the larger the reference rotating speed is. Preferably, the reference rotation speed is a minimum fan rotation speed at which the air outlet of the air deflector at the preset air guide angle can make the indoor air fully circulate, and the air deflector can be placed at the preset air guide angle under the experimental condition and determined according to the air outlet area of the air outlet, the air outlet speed of the air outlet and the like. The reference rotating speed is determined according to the real-time air guide angle of the air guide plate, the influence of the air guide angle of the air guide plate on the air outlet quantity, the air outlet speed and other factors influencing air circulation is fully considered, and the target rotating speed of the indoor fan in the comfort control process is determined based on the reference rotating speed, so that the method is more reasonable and accurate, the problem of air temperature stratification can be solved, and unnecessary energy consumption can be avoided.
For example, as an embodiment, the predetermined wind guiding angle is 45 ° from the horizontal direction. The corresponding relation between the deviation angle and the correction coefficient is prestored, and the correction coefficient is a positive number not less than 1. For example, a deviation angle range of [0 °, 5 °), the corresponding correction factor is 100%; the deviation angle is [5 degrees, 10 degrees ], and the corresponding correction coefficient is 105 percent; the deviation angle range is [10 degrees, 20 degrees ], and the corresponding correction coefficient is 115 percent; the deviation angle is [20 degrees, 30 degrees ], and the corresponding correction coefficient is 130 percent; the deviation angle is greater than or equal to 30 degrees, and the corresponding correction coefficient is 140 percent. The obtained real-time air guide angle of the air guide plate of the indoor unit is 60 degrees, and then the deviation angle between the real-time air guide angle and the preset air guide angle is 15 degrees. From the correspondence between the deviation angle and the correction coefficient, the corresponding correction coefficient was 115%. And determining a reference rotating speed according to the deviation angle and a preset reference rotating speed, specifically, determining the rotating speed according to the product of the reference rotating speed and the correction coefficient as the reference rotating speed. Assuming that the reference rotation speed is r0, the reference rotation speed r =115% r 0. In this embodiment, the correction coefficient is 1 and the reference rotation speed is equal to the preset reference rotation speed at least when the deviation angle is 0 °.
Step 12: and after the real-time rotating speed meets the comfort control triggering condition, executing a comfort control process, and controlling the indoor fan to operate at a target rotating speed higher than the real-time rotating speed.
And the comfort control triggering condition at least comprises that the real-time rotating speed is not greater than the reference rotating speed. If the real-time rotation speed is not greater than the reference rotation speed as a result of comparing the real-time rotation speed with the reference rotation speed in step 11, it is considered that the indoor air circulation is insufficient due to the operation at the real-time rotation speed, and the temperature stratification is likely to occur. In this case, the comfort control process will be triggered. In some other preferred embodiments, the comfort control triggering condition further includes: the duration that the real-time rotating speed is not more than the reference rotating speed reaches the reference time. That is, considering that the air circulation process is a gradual change process, the comfort control process is not triggered immediately when the real-time rotation speed is not greater than the reference rotation speed, but triggered when the real-time rotation speed is not greater than the reference rotation speed for a certain period of time and when the duration time reaches the reference time. The reference time can be a known and prestored time value which can be called and used by the controller at any time.
And executing a comfort control process, at least comprising controlling the indoor fan to operate at a target rotating speed higher than the real-time rotating speed. As described above, if the real-time rotation speed is not greater than the reference rotation speed, it is considered that the operation at the real-time rotation speed easily causes insufficient ventilation of the indoor air. In order to avoid the phenomenon of temperature stratification of indoor air caused by insufficient air circulation, after the comfort control triggering condition is met, the comfort control process is executed, the rotating speed higher than the real-time rotating speed is taken as the target rotating speed, and the indoor fan is controlled to operate at the target rotating speed. Therefore, by forcibly increasing the target rotating speed, the air outlet speed of the air outlet of the indoor unit can be increased by increasing the rotating speed of the fan, the indoor air circulation is accelerated, and the problem of poor heating comfort caused by temperature stratification of indoor air when heating is caused by reduction of the rotating speed and poor air circulation is effectively avoided.
As a preferred embodiment, controlling the indoor fan to operate at a target rotation speed higher than the real-time rotation speed specifically includes: and controlling the indoor fan to operate by taking the maximum rotation speed allowed by heating operation as a target rotation speed. Further, the air flow rate is increased.
In some other preferred embodiments, the comfort control process further comprises: the air guide angle of the air guide plate of the indoor unit is adjusted, so that the air guided by the air guide plate flows along the direction below the horizontal direction. For example, the wind guiding angle of the wind guiding plate is controlled to be a healthy downward blowing angle, so that the wind is blown out downwards as much as possible, and hot air is blown to the ground, thereby increasing the circulation of cold and hot air in the room and improving the speed of eliminating the layering phenomenon of the cold and hot air.
In some other preferred embodiments, when the air conditioner is in heating operation, the real-time frequency of the compressor of the air conditioner is also obtained, and the comfort control process may further include: the compressor is controlled to operate at a target frequency higher than the real-time frequency. In a preferred embodiment, the compressor is controlled to operate at a target frequency which is the maximum frequency allowed for the heating operation. The purpose that handles like this is forcing under the condition that indoor fan operates with the target rotational speed that is higher than real-time rotational speed, owing to force indoor fan rotational speed to improve, can make the air-out temperature reduce, causes the air-out temperature to be unsuitable. In order to solve the problem, when the rotating speed of the indoor fan is forcibly increased, the target frequency of the compressor is also increased, and the air outlet temperature is increased through the increase of the frequency.
Since the comfort control process is an irregular control process that forcibly increases the rotational speed, it is not entered and then exited. In other preferred embodiments, the comfort control process is started by starting the comfort control process and is exited after the timed time reaches a preset time. And in the process of exiting the comfort control, continuously judging the comfort control trigger condition, and executing the comfort control process again after the trigger condition is met to form a cycle control process. The preset time is also a known and pre-stored time value and can be called and used at any time. And after the comfort control process is exited, the air conditioner is switched to the running state before the comfort control process is entered.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (9)
1. A heating operation control method of an air conditioner, the method comprising:
the air conditioner is heated and operated, the real-time rotating speed of the indoor fan is obtained and compared with the reference rotating speed;
executing a comfort control process after the real-time rotating speed meets the comfort control triggering condition;
the comfort control trigger condition includes at least: the real-time rotating speed is not greater than the reference rotating speed;
the comfort control process includes at least: controlling the indoor fan to operate at a target rotating speed higher than the real-time rotating speed;
the method further comprises the following steps: the air conditioner is heated and operated, a real-time air guide angle of an air deflector of the indoor unit is obtained, and a deviation angle between the real-time air guide angle and a preset air guide angle of the air deflector is calculated; the preset air guide angle is the air guide angle of the air deflector when the air outlet volume of the air outlet of the indoor unit is maximum;
and determining a correction coefficient according to the corresponding relation between the deviation angle and a preset deviation angle and the correction coefficient, and determining the reference rotating speed according to the product of a preset reference rotating speed and the correction coefficient, so that the larger the deviation angle is, the larger the reference rotating speed is.
2. The method of claim 1, wherein the comfort control trigger condition further comprises: the duration that the real-time rotating speed is not more than the reference rotating speed reaches the reference time.
3. The method according to claim 1, wherein the controlling the indoor fan to operate at a target speed higher than the real-time speed specifically comprises: and controlling the indoor fan to operate by taking the maximum rotating speed allowed by heating operation as a target rotating speed.
4. The method of claim 1, wherein the comfort control process further comprises:
and adjusting the air guide angle of an air guide plate of the indoor unit so that the air guided by the air guide plate flows in the direction below the horizontal direction.
5. The method of claim 1, further comprising:
the air conditioner is heated and operated, and the real-time frequency of a compressor of the air conditioner is obtained;
the comfort control process further comprises: controlling the compressor to operate at a target frequency higher than the real-time frequency.
6. The method of claim 5, wherein controlling the compressor to operate at a target frequency higher than the real-time frequency comprises: and controlling the compressor to operate with the maximum frequency allowed by the heating operation as a target frequency.
7. The method of claim 1, further comprising: and starting timing from entering the comfort control process, exiting the comfort control process after the timing time reaches the preset time, and continuously executing the judgment of the comfort control triggering condition.
8. The method of claim 7, wherein after exiting the comfort control process, the air conditioner transitions to an operating state prior to entering the comfort control process.
9. The method according to claim 8, wherein the reference rotation speed is the preset reference rotation speed when the deviation angle is 0 °.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710582114.5A CN108332342B (en) | 2017-07-17 | 2017-07-17 | Heating operation control method for air conditioner |
| PCT/CN2018/091446 WO2019015423A1 (en) | 2017-07-17 | 2018-06-15 | Air conditioner heating operation control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710582114.5A CN108332342B (en) | 2017-07-17 | 2017-07-17 | Heating operation control method for air conditioner |
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| Publication Number | Publication Date |
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| CN108332342A CN108332342A (en) | 2018-07-27 |
| CN108332342B true CN108332342B (en) | 2020-09-25 |
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| CN201710582114.5A Active CN108332342B (en) | 2017-07-17 | 2017-07-17 | Heating operation control method for air conditioner |
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| CN (1) | CN108332342B (en) |
| WO (1) | WO2019015423A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780222B (en) * | 2020-06-30 | 2022-02-01 | 宁波奥克斯电气股份有限公司 | Air conditioner heat accumulation prevention control method and device and air conditioner |
| CN112460764B (en) * | 2020-11-30 | 2022-02-11 | 珠海格力电器股份有限公司 | Air conditioner control method, device, equipment and storage medium |
| CN115247863B (en) * | 2022-08-15 | 2023-10-31 | 海信空调有限公司 | Air conditioner and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW212827B (en) * | 1992-03-07 | 1993-09-11 | Samsung Electronics Co Ltd | Air-conditioning system |
| JP2012215308A (en) * | 2011-03-31 | 2012-11-08 | Azbil Corp | Air-conditioning management system |
| CN104006485A (en) * | 2013-02-21 | 2014-08-27 | 广东美的制冷设备有限公司 | Method for controlling indoor fan rotating speed of air conditioner under heating mode |
| CN105757886A (en) * | 2016-03-03 | 2016-07-13 | 珠海格力电器股份有限公司 | Air conditioner heating control method and device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU601850B2 (en) * | 1987-09-03 | 1990-09-20 | Mitsubishi Denki Kabushiki Kaisha | An airflow control device |
| CN103185016B (en) * | 2011-12-27 | 2015-12-09 | 珠海格力电器股份有限公司 | Method and device for adjusting rotating speed of inner fan of air conditioner |
| CN103759397B (en) * | 2014-02-10 | 2019-05-07 | 广州松下空调器有限公司 | A kind of control method of air conditioner room unit rotation speed of the fan |
| CN103940058B (en) * | 2014-03-31 | 2017-02-08 | 广东美的制冷设备有限公司 | Air conditioner, and control method and device thereof |
| CN104729018B (en) * | 2015-03-18 | 2017-05-10 | 广东美的制冷设备有限公司 | Air-conditioner and control method and control device of air-conditioner |
| CN105066334B (en) * | 2015-07-23 | 2018-06-05 | 合肥美的暖通设备有限公司 | Air conditioner and its control method, control device |
-
2017
- 2017-07-17 CN CN201710582114.5A patent/CN108332342B/en active Active
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2018
- 2018-06-15 WO PCT/CN2018/091446 patent/WO2019015423A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW212827B (en) * | 1992-03-07 | 1993-09-11 | Samsung Electronics Co Ltd | Air-conditioning system |
| JP2012215308A (en) * | 2011-03-31 | 2012-11-08 | Azbil Corp | Air-conditioning management system |
| CN104006485A (en) * | 2013-02-21 | 2014-08-27 | 广东美的制冷设备有限公司 | Method for controlling indoor fan rotating speed of air conditioner under heating mode |
| CN105757886A (en) * | 2016-03-03 | 2016-07-13 | 珠海格力电器股份有限公司 | Air conditioner heating control method and device |
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| CN108332342A (en) | 2018-07-27 |
| WO2019015423A1 (en) | 2019-01-24 |
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Effective date of registration: 20201103 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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