CN113623258B - Wind direction detection device - Google Patents
Wind direction detection device Download PDFInfo
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- CN113623258B CN113623258B CN202110990983.8A CN202110990983A CN113623258B CN 113623258 B CN113623258 B CN 113623258B CN 202110990983 A CN202110990983 A CN 202110990983A CN 113623258 B CN113623258 B CN 113623258B
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- fan
- wind direction
- bearing seat
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- direction detection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of wind direction detection, and particularly discloses a wind direction detection device which comprises a fixing plate and a fan, wherein the fixing plate is used for mounting a power supply, a fan bearing seat and an alarm device, the power supply, the fan bearing seat and the alarm device are connected in series to form a conductive loop, the fan bearing seat is used for being connected with the fan, the fan bearing seat is provided with two first conductive interfaces, the two first conductive interfaces are disconnected, the fan is in threaded connection with the fan bearing seat, the fan rotates under the action of wind force and can drive a second conductive interface on a base of the fan to be close to or far away from the first conductive interfaces, when the first conductive interface is in contact with the second conductive interface, the conductive loop is connected, the alarm device gives an alarm, and the fan of a main transformer cooler is detected to rotate and needs to be maintained; when the second conductive interface is far away from the first conductive interface, the conductive loop cannot be conducted, the alarm device does not give an alarm, and the fan of the main transformer cooler is detected to rotate forwards without maintenance.
Description
Technical Field
The invention relates to the technical field of wind direction detection, in particular to a wind direction detection device.
Background
In the routine maintenance of a transformer substation, the detection of the wind direction of a radiator of the transformer is an indispensable task, the radiator of the transformer comprises a plurality of main transformer cooler fans, in the transformer substation, the wind direction of the main transformer cooler fans has specific requirements, the heat dissipation effect can be influenced by the wind direction error, during the general operation, the switch of the main transformer cooler fans to be detected is integrated into one to two main power switches, therefore, when the wind direction of the main transformer cooler fans is detected, at least 4 to 8 fans are started simultaneously, the wind power below the fans is large and the air flow is very disordered, an operator can hardly determine the wind direction of each fan by sensing, if the wind direction is tested by using tools which can swing along with the wind, such as paper, the paper is involved into the fans, the paper is crushed and clamped into gaps to cause the risk of fan blade blockage, and a cobblestone road for discharging oil is paved on the regional pavement of the transformer, the paper is easy to drive the operating personnel when being rolled in, and the personnel and the equipment are damaged. Because the wind-force below the fan is great and the air current is disorderly, the wind direction sensor of the traditional wind vane structure is difficult to detect the wind direction of the fan of the main transformer cooler.
Disclosure of Invention
The invention aims to provide a wind direction detection device which can safely and intuitively detect the rotating direction of a radiator fan under turbulent airflow.
In order to achieve the purpose, the invention adopts the following technical scheme:
a wind direction detecting device for detecting a wind direction of a working fan, comprising:
the fan bearing seat is provided with two first conductive interfaces of the conductive loop, and the two first conductive interfaces are disconnected;
the fan, the fan with the work fan is just to setting up to can by the air-out drive of work fan is rotatory, the base threaded connection of fan in the fan is accepted the seat, just the tip of base is equipped with two electrically conductive interfaces of second, the fan rotation can drive the electrically conductive interface of second is close to and contacts the first electrically conductive interface on the fan is accepted the seat, in order to switch on electrically conductive return circuit makes alarm device sends out the police dispatch newspaper.
Preferably, one end of the base, which is close to the fan bearing seat, is of a stepped shaft-shaped structure, and one end of the fan bearing seat, which is far from the fixing plate, is provided with a baffle plate, and the baffle plate can abut against the stepped shaft-shaped structure.
Preferably, the alarm device is a horn and/or a light emitting tube.
Preferably, the fixing plate is made of an insulating material.
Preferably, the fixing plate is provided with a hollow hole.
Preferably, the fan blades of the fan are fixedly connected with the base.
Preferably, the fan further comprises a housing, and the fan and the fixing plate are disposed in the housing.
Preferably, the top of the shell, which faces the fan, is provided with a limiting column, and the limiting column can abut against the fan to limit the fan.
Preferably, the shell is a cylinder, and the shell is provided with a hollow structure.
Preferably, the housing is provided with a handle.
The invention has the beneficial effects that:
the wind direction detection device comprises a conductive loop with an alarm device, the alarm device is controlled to alarm or not by the connection and disconnection of the conductive loop, the disconnection point of the conductive loop is arranged on a fan bearing seat, when a fan in the wind direction detection device rotates under the action of wind force, a second conductive interface on a fan base can be close to or far away from a first conductive interface on the fan bearing seat, when the first conductive interface is contacted with the second conductive interface, the conductive loop is connected, the alarm device gives an alarm, the fan rotation direction of the radiator can be judged to be opposite to the fan rotation direction required by work, when the first conductive interface is far away from the second conductive interface, the circuit cannot be connected, the alarm device can not give an alarm all the time, the fan rotation direction of the radiator can be judged to be the fan rotation direction required by work, the risk of fan blade blocking caused by paper detection of the wind direction can be avoided, prevent that the paper from driving the staff to tumble injury when being drawn into, improve staff's security, compare with current wind direction detection device, can detect out the direction of rotation of radiator fan directly perceivedly under the turbulent air current, and simple structure, the cost of manufacture is lower.
Drawings
FIG. 1 is a schematic structural diagram of a wind direction detecting device according to the present invention;
fig. 2 is another schematic structural diagram of the wind direction detecting device of the present invention.
In the figure:
1. a power source; 2. a fan bearing seat; 3. a horn; 4. a light emitting tube; 5. a fixing plate; 6. a fan; 7. a housing.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Example one
In the operation maintenance work of a transformer substation, the maintenance of a radiator of a transformer is indispensable, a main transformer cooler fan in the radiator has a specific rotating direction according to work requirements, one or more main transformer cooler fans in the radiator may need to be replaced during daily maintenance, if the main transformer cooler fans are reversed, the heat dissipation effect of the radiator is influenced, even the working stability of the transformer is influenced, so that the rotating direction of the main transformer cooler fan needs to be detected during the daily maintenance, during general operation, a worker integrates switches of the main transformer cooler fans to be detected into one to two main power switches, therefore, when the wind direction of the main transformer cooler fans is detected, at least 4 to 8 fans are started simultaneously, the airflow below the fans is quite disordered, and because the main transformer cooler fans are large, the wind force below the fans is also large, the traditional wind direction sensor adopting a wind vane structure is difficult to detect the wind direction of a fan of a main transformer cooler. If simply adopt the wobbling instrument of following with the wind such as paper to detect the wind direction, because the wind-force of main transformer cooler fan is great, the paper is drawn into the fan easily, leads to the flabellum card to hinder, has increaseed the maintenance degree of difficulty, drives the staff easily when the paper is drawn into the fan and falls and hinder, has reduced equipment and staff's security.
In one embodiment of the invention, a wind direction detecting device is provided, in which a fan can rotate under the wind force of a main transformer cooler fan of a radiator, the rotation of the fan can make a second conductive interface on a base of the fan close to or far away from a first conductive interface on a fan bearing seat, when the first conductive interface is contacted with the second conductive interface, a conductive loop in the wind direction detecting device is conducted, an alarm device gives an alarm, and at this time, the fan of the main transformer cooler is detected to be reversed, and maintenance is needed; if the first conductive interface and the second conductive interface are not contacted all the time, the alarm device can not give an alarm, and the main transformer cooler fan is detected to rotate forwards without maintenance. The wind direction detection device can visually and safely detect the wind direction of the main transformer cooler fan of the radiator, avoids fan blade blockage, prevents workers from falling and being injured, is simple in structure, convenient to operate and low in manufacturing cost, and can improve the safety and efficiency of detection.
As shown in fig. 1, the wind direction detecting device comprises a fixing plate 5 and a fan 6, the fixing plate 5 is used for installing a power supply 1, a fan bearing seat 2 and an alarm device, wherein the power supply 1, the fan bearing seat 2 and the alarm device are connected in series by a conducting wire to form a conductive loop, the alarm device gives an alarm after the circuit is conducted, the fan bearing seat 2 is used for being connected with the fan 6, two first conductive interfaces are arranged on the fan bearing seat 2, and the two first conductive interfaces are disconnected, so that the conductive loop formed by connecting the power supply 1, the fan bearing seat 2 and the alarm device in series is a disconnected circuit in a general state, the fan 6 is in threaded connection with the fan bearing seat 2, on one hand, the fan 6 rotates under the action of wind force to drive a second conductive interface on the base of the fan 6 to be close to the first conductive interface on the fan bearing seat 2, and when the first conductive interface is contacted with the second conductive interface, the conductive loop is connected, the alarm device gives an alarm, and the fan of the main transformer cooler of the radiator is detected to rotate reversely at the moment and needs to be maintained; on the other hand, the fan 6 can also drive the second conductive interface on the base of the fan 6 to be away from the first conductive interface on the fan bearing seat 2 under the action of wind power, at the moment, the first conductive interface cannot be in contact with the second conductive interface, the conductive loop is always in an off state, the alarm device cannot give an alarm all the time, and the main transformer cooler fan of the radiator is detected to rotate forwards without maintenance.
Further, in an embodiment, the base of the fan 6 may be configured to be a stepped shaft structure, a diameter of a stepped shaft on a side close to the fan bearing seat 2 is larger, and a circle of baffle is disposed on a side of the fan bearing seat 2 away from the fixing plate 5, so that when the second conductive interface on the base of the fan 6 is driven by the fan 6 to rotate under the action of wind force to be away from the first conductive interface on the fan bearing seat 2, the fan 6 is not separated from the fan bearing seat 2 due to too large wind force, the worker is prevented from being damaged due to too fast rotation speed of the fan 6, parts of the wind direction detection device are prevented from being lost, and the fan is prevented from being involved after the fan 6 is separated from the fan bearing seat 2, thereby causing blocking of the fan blades, even damaging the fan, and the reliability of the wind direction detection device is improved.
Preferably, in one embodiment, the alarm device in the wind direction detecting device may adopt a horn 3, and when the conductive loop is turned on, the horn 3 makes a sound to prompt an operator that the main transformer cooler fan of the radiator is reversed, and the operator needs to timely maintain and change the rotating direction of the main transformer cooler fan; in another embodiment, the alarm device in the wind direction detection device may adopt a light emitting tube 4, such as a bulb, etc., when the conductive loop is conducted, the small bulb emits light to prompt the worker that the fan of the main transformer cooler of the radiator is reversed at the moment, and the worker can timely maintain the radiator after receiving the signal; in other embodiments, can also establish ties loudspeaker 3 and luminotron 4 simultaneously and regard as alarm device in the conductive loop, after conductive loop switches on, loudspeaker 3 makes sound, and luminotron 4 is luminous simultaneously, and suggestion staff owner becomes cooler fan reversal, avoids because of operational environment is noisy, can't hear loudspeaker 3 sound clearly and lead to staff's judgement error.
Preferably, with reference to fig. 1, the fixing plate 5 may be made of an insulating material, such as an organic polymer material, a plastic, and the like, and the material has a certain hardness and wear resistance, and also has a good insulating property, so as to prevent the wind direction detecting device from being disabled due to a short circuit occurring in the conductive loop on the fixing plate 5. In one embodiment, the power source 1, the fan bearing base 2 and the alarm device can be fixed on the fixing plate 5 by gluing, and then are sequentially connected in series by using a lead to form a conductive loop; in other embodiments, a fixing hole may be formed in the fixing plate 5, and the power supply 1, the fan receptacle 2 and the alarm device are embedded in the fixing hole and then connected in series by a wire to form a conductive loop. Furthermore, some hollow holes can be formed in the fixing plate 5, and the hollow holes can facilitate wind to pass through, so that the fan 6 in the wind direction detection device is driven to rotate.
Further, the blades of the fan 6 and the base of the fan 6 should be fixedly connected to each other, so that when the blades of the fan 6 rotate, the base of the fan 6 rotates along with the blades of the fan 6, and the fan 6 can be close to or far away from the first conductive interface of the fan bearing base 2 under the action of wind.
Preferably, referring to fig. 2, the wind direction detecting device further includes a housing 7, and the fixing plate 5 and the fan 6 are installed in the housing 7. In one embodiment, the fixing plate 5 and the housing 7 can be fixedly connected together by welding; in another embodiment, the fixing plate 5 and the housing 7 can be fixedly connected together by a bolt connection. Further, shell 7 can set to cylindrical and set up hollow out construction on shell 7, connects fixed plate 5 on cylindrical shell 7's plane, guarantees the stability of fixed plate 5 work, improves the joint strength between fixed plate 5 and the shell 7, and hollow out construction can make things convenient for outside wind to get into inside, drives fan 6 and rotates. As a preferred technical solution, in an embodiment, a handle may be disposed outside the housing 7, because when the wind direction detection device is used to detect the wind direction of the main transformer cooler fan, the fan 6 in the wind direction detection device needs to be opposite to the main transformer cooler fan, and the main transformer cooler fan is generally perpendicular to the ground, so that the handle may be disposed to facilitate an operator to adjust the angle of the fan 6 in the wind direction detection device, and also facilitate the operator to carry the wind direction detection device. It is conceivable that the handle may be welded directly to the housing 7 or may be fixedly connected to the housing 7 by means of bolts.
According to the wind direction detection device, the fan 6 in the wind direction detection device rotates under the action of wind power by virtue of the conductive loop provided with the alarm device and taking the fan 6 as a switching element for conducting a circuit, on one hand, a second conductive interface on the base of the fan 6 can be close to a first conductive interface on the fan bearing seat 2 in the conductive loop, when the second conductive interface is contacted with the first conductive interface, the conductive loop is conducted, the alarm device gives an alarm, and at the moment, a worker is prompted to reversely rotate the fan of the main transformer cooler to be overhauled in time; on the other hand, under the action of wind power, the second conductive interface on the base of the fan 6 can be far away from the first conductive interface on the fan bearing seat 2 in the conductive loop, at the moment, the second conductive interface cannot be in contact with the first conductive interface, and the alarm device cannot give an alarm all the time to indicate that the fan of the main transformer cooler rotates forwards at the moment without maintenance. This wind direction detection device can detect out the wind direction of the main transformer cooler of radiator safely, directly perceivedly under the great and air current disorder condition of wind-force, prevents that the fan from damaging, avoids the staff to fall and hinders, improve equipment and staff's security performance, and this wind direction detection device simple structure simultaneously, easy operation, manufacturing cost is lower.
Example two
The invention provides a wind direction detection device, which is different from the wind direction detection device in the first embodiment in that:
in this embodiment, be provided with spacing post on wind direction detection device's the shell 7, spacing post is just to the top of fan 6, and the length of spacing post can be with fan 6 restriction between spacing post and fan socket 2, avoids fan 6 to deviate from in fan socket 2 under the effect of wind power, makes wind direction detection device inefficacy.
The spacing post that this embodiment provided can restrict fan 6's displacement effectively, guarantees wind direction detection device's job stabilization nature, avoids wind direction detection device to become invalid.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A wind direction detecting device for detecting a wind direction of a working fan, comprising:
the fan bearing seat comprises a fixing plate (5), wherein a power supply (1), a fan bearing seat (2) and an alarm device are arranged on the fixing plate (5), the power supply (1), the fan bearing seat (2) and the alarm device are connected in series to form a conductive loop, the fan bearing seat (2) is provided with two first conductive interfaces of the conductive loop, and the two first conductive interfaces are disconnected;
the fan (6) is arranged opposite to the working fan and can be driven to rotate by the air outlet of the working fan, the base of the fan (6) is in threaded connection with the fan bearing seat (2), two second conductive interfaces are arranged at the end part of the base, and the fan (6) can drive the second conductive interfaces to be close to and contact with the first conductive interfaces on the fan bearing seat (2) through rotation so as to conduct the conductive loop and enable the alarm device to give an alarm;
one end of the base, which is close to the fan bearing seat (2), is of a stepped shaft-shaped structure, and a baffle is arranged at one end of the fan bearing seat (2), which is far away from the fixed plate (5), and can abut against the stepped shaft-shaped structure;
or, further comprising a housing (7), the fan (6) and the fixing plate (5) being arranged in the housing (7).
2. The wind direction detection device according to claim 1, characterized in that the alarm device is a horn (3) and/or a light emitting tube (4).
3. The wind direction detection device according to claim 1, characterized in that the fixing plate (5) is made of an insulating material.
4. The wind direction detecting device according to any of claims 1-3, characterized in that the fixing plate (5) is provided with a hollow hole.
5. The wind direction detection device according to claim 1, characterized in that the blades of the fan (6) are fixedly connected with the base.
6. The wind direction detection device according to claim 1, characterized in that a limiting post is arranged on the top of the housing (7) facing the fan (6), and the limiting post can abut against the fan (6) to limit the fan (6).
7. The wind direction detection device according to claim 1, characterized in that the housing (7) is a cylinder, and the housing (7) is provided with a hollow structure.
8. The wind direction detection device according to claim 6 or 7, characterized in that a handle is provided on the housing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110990983.8A CN113623258B (en) | 2021-08-26 | 2021-08-26 | Wind direction detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110990983.8A CN113623258B (en) | 2021-08-26 | 2021-08-26 | Wind direction detection device |
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| Publication Number | Publication Date |
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| CN113623258A CN113623258A (en) | 2021-11-09 |
| CN113623258B true CN113623258B (en) | 2022-07-08 |
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| CN202110990983.8A Active CN113623258B (en) | 2021-08-26 | 2021-08-26 | Wind direction detection device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002349262A (en) * | 2001-05-25 | 2002-12-04 | Komatsu Ltd | Drive control device of cooling fan |
| JP2008244131A (en) * | 2007-03-27 | 2008-10-09 | Toshiba Corp | Casing for outdoor installation equipment and cooling method therefor |
| CN204283960U (en) * | 2014-11-26 | 2015-04-22 | Tcl通力电子（惠州）有限公司 | Fan operating state detection system |
| CN104714867A (en) * | 2013-12-12 | 2015-06-17 | 鸿富锦精密工业（深圳）有限公司 | Reverse fan arrangement testing system and method |
| WO2017168887A1 (en) * | 2016-03-31 | 2017-10-05 | 日立ジョンソンコントロールズ空調株式会社 | Outdoor unit for air conditioner |
| CN109031865A (en) * | 2018-09-07 | 2018-12-18 | 苏州佳世达光电有限公司 | A kind of fan installation direction detection components and projector |
| CN110594182A (en) * | 2019-09-25 | 2019-12-20 | 苏州浪潮智能科技有限公司 | Fan wind direction detection method and system |
-
2021
- 2021-08-26 CN CN202110990983.8A patent/CN113623258B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002349262A (en) * | 2001-05-25 | 2002-12-04 | Komatsu Ltd | Drive control device of cooling fan |
| JP2008244131A (en) * | 2007-03-27 | 2008-10-09 | Toshiba Corp | Casing for outdoor installation equipment and cooling method therefor |
| CN104714867A (en) * | 2013-12-12 | 2015-06-17 | 鸿富锦精密工业（深圳）有限公司 | Reverse fan arrangement testing system and method |
| CN204283960U (en) * | 2014-11-26 | 2015-04-22 | Tcl通力电子（惠州）有限公司 | Fan operating state detection system |
| WO2017168887A1 (en) * | 2016-03-31 | 2017-10-05 | 日立ジョンソンコントロールズ空調株式会社 | Outdoor unit for air conditioner |
| CN108885018A (en) * | 2016-03-31 | 2018-11-23 | 日立江森自控空调有限公司 | The outdoor unit of conditioner |
| CN109031865A (en) * | 2018-09-07 | 2018-12-18 | 苏州佳世达光电有限公司 | A kind of fan installation direction detection components and projector |
| CN110594182A (en) * | 2019-09-25 | 2019-12-20 | 苏州浪潮智能科技有限公司 | Fan wind direction detection method and system |
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