CN115371230A - Control method, system and medium for outdoor fan of air conditioner - Google Patents
Control method, system and medium for outdoor fan of air conditioner Download PDFInfo
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- CN115371230A CN115371230A CN202211052037.XA CN202211052037A CN115371230A CN 115371230 A CN115371230 A CN 115371230A CN 202211052037 A CN202211052037 A CN 202211052037A CN 115371230 A CN115371230 A CN 115371230A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004590 computer program Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 abstract description 7
- 238000001704 evaporation Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 description 9
- 238000004378 air conditioning Methods 0.000 description 6
- 230000001012 protector Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
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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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F11/62—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
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method, a system and a medium for an outdoor fan of an air conditioner, which can prevent a unit from reporting high voltage for protection and enable the unit to run stably. The method comprises the following steps: acquiring the exhaust pressure of an air conditioner outdoor unit in real time; when the exhaust pressure is not less than a first threshold value, controlling and adjusting the rotating speed of the outer fan according to the exhaust pressure so as to adjust the exhaust pressure; and when the exhaust pressure is smaller than a first threshold value, automatically adjusting the rotating speed of the outer fan according to the outdoor environment temperature. The invention can effectively reduce the heat exchange quantity of the outdoor heat exchanger when the air conditioner heats, and adjust the heat exchange quantity of the evaporation side by switching the gears of the outer fan (air quantity conversion), thereby reducing the exhaust pressure, and the switching of the gears of the outer fan (air quantity conversion) is judged according to the exhaust pressure, so that the unit can stably operate, the operation range of the unit is greatly expanded, and the unit is prevented from reporting high pressure protection.
Description
Technical Field
The invention belongs to the technical field of air conditioner outdoor units, and particularly relates to a method, a system and a medium for controlling an air conditioner outdoor fan.
Background
At present, most manufacturers set the rotating speed of an outdoor unit of an air conditioner by adopting a control method for controlling the rotating speed of an outdoor fan according to the outdoor environment temperature, for example, the patent 'air conditioner control method and control device' (publication number CN 107062518B) discloses an air conditioner control method, which solves the problem that the rotating speed of the fan cannot be automatically adjusted according to different air conditioner operating environments, the fan can save energy when operating at a relatively low rotating speed, the noise of the outdoor unit can be reduced, the air conditioning system can operate more stably, the times of stopping and starting the outdoor fan are reduced, and the use comfort of users is improved. However, this method has a drawback:
when the air conditioning equipment is in heating operation, high-voltage protection is easy to occur when the outdoor temperature is overhigh. When the air conditioning equipment heats the operation, the outdoor heat exchanger is the evaporation side, and when outdoor temperature was higher, evaporation temperature was too high and then lead to the exhaust rising, and when pressure was higher than the pressure switch guard value, the unit was shut down because of the high pressure switch disconnection.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a control method, a system and a medium for an outdoor fan of an air conditioner, which can prevent a unit from reporting high-voltage protection, can protect the heating operation of the air conditioner and ensure that the unit can stably operate.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the invention provides a method for controlling an outdoor fan of an air conditioner, which comprises the following steps:
acquiring the exhaust pressure of an outdoor fan of the air conditioner in real time;
when the exhaust pressure is not less than a first threshold value, controlling and adjusting the rotating speed of the outer fan according to the exhaust pressure so as to adjust the exhaust pressure;
and when the exhaust pressure is smaller than a first threshold value, automatically adjusting the rotating speed of the outer fan according to the outdoor environment temperature.
Further, controlling and adjusting the rotating speed of the external fan according to the exhaust pressure to adjust the exhaust pressure, and the method comprises the following steps:
when the exhaust pressure is less than or equal to the first threshold and less than the second threshold, controlling the rotating speed of the external machine to reduce a preset rotating speed until the exhaust pressure is reduced to a third threshold, and automatically adjusting the rotating speed of the external machine according to the outdoor environment temperature;
when the exhaust pressure is larger than the second threshold value, the rotation speed of the outer fan is controlled to be reduced to the lowest rotation speed no matter the outer fan is in any rotation speed until the exhaust pressure is lower than the fourth threshold value, the fan is controlled to be increased by a preset rotation speed until the exhaust pressure is reduced to the third threshold value, and the rotation speed of the outer fan is automatically adjusted according to the outdoor environment temperature.
Further, the first threshold is larger than a third threshold, and a pressure difference exists between the first threshold and the third threshold.
Further, the pressure difference is 3-8bar.
Further, the first threshold value is 36bar;
the second threshold value is 40bar;
the third threshold value is 32bar;
the fourth threshold value is 37bar.
Further, the preset rotating speed is one gear rotating speed of the multi-gear fan or 300rpm.
Further, when the time from the last acquired exhaust pressure to the last acquired exhaust pressure exceeds a preset value, the method for controlling the outdoor fan of the air conditioner is restarted according to the last acquired exhaust pressure.
In a second aspect, the invention provides an outdoor fan control system of an air conditioner, which comprises a controller, a fan and an air pressure sensor, wherein the fan and the air pressure sensor are connected with the controller;
the air pressure sensor is used for collecting exhaust pressure and transmitting the exhaust pressure to the controller;
the fan is used for receiving the instruction of the controller to change the rotating speed of the fan;
the controller is configured to perform the control method according to the first aspect.
In a third aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a first threshold value, when the exhaust pressure is not less than the first threshold value, the control method is switched, the rotating speed of the external fan is controlled and adjusted according to the exhaust pressure to adjust the exhaust pressure, the high-pressure protection of the unit is avoided, the heating operation of the air conditioner can be protected, and the unit can operate stably.
2. The invention can effectively reduce the heat exchange quantity of the heat exchanger by reducing the air quantity at the outdoor side, and adjust the heat exchange quantity at the evaporation side by switching the gears of the external fan (air quantity change), thereby reducing the exhaust pressure, ensuring the unit to stably run, greatly widening the running range of the unit and avoiding the unit from reporting high pressure protection.
3. According to the invention, the pressure difference exists between the first threshold and the third threshold, so that frequent high-pressure protection is avoided.
4. The method is simple, exhaust pressure can be adjusted by adjusting the gear of the outdoor unit or the rotating speed of the direct current fan, adaptability is strong, and the method can be adapted to most of air conditioning systems on the market.
5. After the power failure is restarted, in order to avoid the situation that the air pressure is mistakenly judged to be in the process of reducing the exhaust pressure, the control is carried out again, the possibility of high-pressure protection of the unit is reduced, and the stability of the fan is improved.
Drawings
Fig. 1 is a control schematic of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
the present embodiment provides a method, a system, and a medium for controlling an outdoor fan of an air conditioner, as shown in fig. 1, including the following steps:
acquiring the exhaust pressure of an outdoor fan of the air conditioner in real time;
when the exhaust pressure is not less than the first threshold value, the rotating speed of the outer fan is controlled and adjusted according to the exhaust pressure so as to adjust the exhaust pressure;
and when the exhaust pressure is smaller than a first threshold value, automatically adjusting the rotating speed of the outer fan according to the outdoor environment temperature.
Specifically, controlling and adjusting the rotating speed of the external fan according to the exhaust pressure to adjust the exhaust pressure comprises the following steps:
(1) when the exhaust pressure is smaller than a first threshold value, the rotating speed gear of the outer fan is automatically adjusted according to the outdoor environment temperature;
(2) when the exhaust pressure is smaller than the first threshold value and smaller than the second threshold value, the rotating speed of the external machine is immediately reduced to a preset rotating speed, and at the moment, if the exhaust pressure is reduced to a third threshold value, the rotating speed of the external fan is automatically adjusted according to the outdoor environment temperature.
(3) When the exhaust pressure is larger than the second threshold value, the rotating speed is reduced to the lowest rotating speed (namely the lowest gear of the multi-gear fan for the multi-gear fan) no matter the outer fan is at any rotating speed, and the gear of the fan is increased by the preset rotating speed until the pressure is lower than the fourth threshold value.
Preferably, the first threshold is greater than the third threshold, and a pressure difference exists between the first threshold and the third threshold. And a pressure difference exists between the first threshold and the third threshold, so that frequent high-pressure protection is avoided. The pressure difference is preferably 3-8bar.
Preferably, the first threshold is 36bar; the second threshold is 40bar; the third threshold value is 32bar; the fourth threshold value is 37bar. The value settings for these thresholds are the optimum exhaust pressure settings that applicants have experimentally verified. The test method adopted by the applicant is to test the working condition according to the national standard GB/T17758-2010 maximum heating operation requirement: indoor 27 ℃/-; outdoor 21 ℃/15 ℃, test requirements are as follows:
national standard GB/T17758-2010:5.3.9 maximum operation heating
a) When the test is carried out according to the method of 6.3.9, all parts of the air conditioner cannot be damaged, and the air conditioner can normally operate;
b) During the maximum operation heating operation period of the air conditioner, the overload protector should not be tripped;
c) When the overload protector is not reset in the first 5min of operation, the overload protector is reset within no more than 30 min of shutdown and continuously operates for 1 h;
d) For the overload protector reset manually, the overload protector can be tripped within the first 5min, and can be reset forcibly after being tripped for 10 min, and the overload protector can continuously run for 1 h.
Note that in the above test, the automatic reset overload protection device that turned on and off the motor to prevent overheating of the indoor heat exchanger was periodically operated, and the air conditioner was considered to be continuously operated.
The working condition is too harsh for the heating operation of the air conditioner, and high-voltage protection is easily caused. If no measures are taken to regulate the high pressure of the unit, the air conditioning unit is difficult to operate under the working condition.
According to the method and the set threshold, the exhaust pressure can be effectively adjusted through adjustment of the outdoor fan, high-pressure protection of the unit is avoided, and the unit can operate for a long time under the condition that the requirement of national standard GB/T17758-2010 maximum heating operation is met. The existing air conditioner fan adjusting method usually reports high-voltage protection within 120 min.
Specifically, the preset rotating speed is one gear rotating speed of the multi-gear fan or 300rpm.
The method can adjust the exhaust pressure by adjusting the gear of the outdoor unit or the rotating speed of the direct current fan, and can be suitable for most of on-sale machine types.
Specifically, the initial determination of the exhaust pressure is processed according to an exhaust pressure rise line. When the exhaust pressure is just started or the acquired exhaust pressure is interrupted due to other reasons such as power interruption (namely the time from the current acquired exhaust pressure to the last acquired exhaust pressure exceeds a preset value (generally 5 min)), when the initial judgment of the exhaust pressure acquires the exhaust pressure again, the control is performed again according to the exhaust pressure, namely, the judgment is restarted.
As an example, if the exhaust pressure obtained after starting up is 38bar, if the judgment of the rising line is that the fan is reduced for one gear. If the pressing force is judged to be reduced according to the line, the fan is lifted to the first gear, and at the moment, the judgment is carried out according to the lifting line.
The possibility of high-voltage protection of the unit is reduced, and the stability of the fan is improved.
In addition, the term "automatically adjusting the rotation speed of the external fan according to the outdoor environment temperature" in the method refers to using a conventional method for automatically adjusting the wind speed according to the outdoor environment temperature, which has been disclosed in the prior art (for example, patent "a control method and a control device for an air conditioner", publication No. CN 107062518B), and the present invention is not described in detail again.
The implementation principle is as follows: when the air conditioning equipment is used for heating, the outdoor heat exchanger is an evaporation side, when the outdoor temperature is higher, the evaporation temperature is too high, the exhaust is increased, when the pressure is higher than the protection value of a pressure switch, the unit is stopped due to the disconnection of the high-voltage switch, and the exhaust pressure can be reduced only by reducing the heat exchange quantity of the evaporation side.
Example two:
the embodiment provides an outdoor fan control system of an air conditioner, which comprises a controller, a fan and an air pressure sensor, wherein the fan and the air pressure sensor are connected with the controller;
the air pressure sensor is used for collecting exhaust pressure and transmitting the exhaust pressure to the controller;
the fan is used for receiving the instruction of the controller and changing the rotating speed of the fan;
the controller is used for executing the steps of the control method according to the first embodiment.
Example three:
embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the method of an embodiment.
Parts not described in this specification are prior art.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the invention, "plurality" means two or more unless explicitly specifically defined otherwise.
In the description herein, reference to the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (9)
1. A control method for an outdoor fan of an air conditioner is characterized by comprising the following steps:
acquiring the exhaust pressure of an outdoor fan of the air conditioner in real time;
when the exhaust pressure is not less than a first threshold value, controlling and adjusting the rotating speed of the outer fan according to the exhaust pressure to adjust the exhaust pressure to be reduced;
and when the exhaust pressure is smaller than a first threshold value, automatically adjusting the rotating speed of the outer fan according to the outdoor environment temperature.
2. The outdoor fan control method of an air conditioner according to claim 1, wherein adjusting the speed of the outdoor fan to adjust the discharge pressure according to the discharge pressure control comprises:
when the exhaust pressure is less than or equal to the first threshold and less than the second threshold, controlling the rotating speed of the external machine to reduce a preset rotating speed until the exhaust pressure is reduced to a third threshold, and automatically adjusting the rotating speed of the external machine according to the outdoor environment temperature;
when the exhaust pressure is larger than a second threshold value, the rotation speed of the outer fan is controlled to be reduced to the lowest rotation speed no matter the outer fan is in any rotation speed until the exhaust pressure is lower than a fourth threshold value, the gear of the fan is controlled to be increased by a preset rotation speed until the exhaust pressure is reduced to a third threshold value, and the rotation speed of the outer fan is automatically adjusted according to the outdoor environment temperature.
3. The outdoor fan control method of an air conditioner according to claim 2, wherein said first threshold value is greater than a third threshold value, and a pressure difference exists between the first threshold value and the third threshold value.
4. The outdoor fan control method of an air conditioner according to claim 2, wherein said pressure difference is 3-8bar.
5. The outdoor fan control method of an air conditioner according to claim 2, wherein the first threshold value is 36bar;
the second threshold is 40bar;
the third threshold value is 32bar;
the fourth threshold value is 37bar.
6. The outdoor fan control method of an air conditioner according to claim 2, wherein the preset rotation speed is one-gear rotation speed of a multi-gear fan or 300rpm.
7. The method of claim 1, wherein when a time from a last acquired discharge pressure to a last acquired discharge pressure exceeds a preset value, the method of controlling the outdoor fan of the air conditioner is restarted according to the last acquired discharge pressure.
8. The control system of the outdoor fan of the air conditioner is characterized by comprising a controller, the fan and an air pressure sensor, wherein the fan and the air pressure sensor are connected with the controller;
the air pressure sensor is used for collecting exhaust pressure and transmitting the exhaust pressure to the controller;
the fan is used for receiving the instruction of the controller and changing the rotating speed of the fan;
the controller is configured to perform the control method of any one of claims 1-7.
9. Computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211052037.XA CN115371230A (en) | 2022-08-31 | 2022-08-31 | Control method, system and medium for outdoor fan of air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211052037.XA CN115371230A (en) | 2022-08-31 | 2022-08-31 | Control method, system and medium for outdoor fan of air conditioner |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6241604B1 (en) * | 1998-02-04 | 2001-06-05 | William C. Colter | Ventilation temperature and pressure control apparatus |
| CN103574835A (en) * | 2012-07-31 | 2014-02-12 | 美的集团股份有限公司 | Method and device for controlling outdoor fan of air conditioner |
| CN104613601A (en) * | 2015-01-29 | 2015-05-13 | 广东美的制冷设备有限公司 | Method and device for controlling outdoor fan in split air-conditioner |
| JP6399181B1 (en) * | 2017-09-26 | 2018-10-03 | 株式会社富士通ゼネラル | Air conditioner |
| JP2019060527A (en) * | 2017-09-26 | 2019-04-18 | 株式会社富士通ゼネラル | Air conditioner |
| CN113375284A (en) * | 2021-06-30 | 2021-09-10 | 宁波奥克斯电气股份有限公司 | External fan control method and device and air conditioner |
-
2022
- 2022-08-31 CN CN202211052037.XA patent/CN115371230A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6241604B1 (en) * | 1998-02-04 | 2001-06-05 | William C. Colter | Ventilation temperature and pressure control apparatus |
| CN103574835A (en) * | 2012-07-31 | 2014-02-12 | 美的集团股份有限公司 | Method and device for controlling outdoor fan of air conditioner |
| CN104613601A (en) * | 2015-01-29 | 2015-05-13 | 广东美的制冷设备有限公司 | Method and device for controlling outdoor fan in split air-conditioner |
| JP6399181B1 (en) * | 2017-09-26 | 2018-10-03 | 株式会社富士通ゼネラル | Air conditioner |
| JP2019060527A (en) * | 2017-09-26 | 2019-04-18 | 株式会社富士通ゼネラル | Air conditioner |
| CN113375284A (en) * | 2021-06-30 | 2021-09-10 | 宁波奥克斯电气股份有限公司 | External fan control method and device and air conditioner |
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