CN115875316A - Fan blade noise reduction method, fan blade device and air conditioning system - Google Patents
Fan blade noise reduction method, fan blade device and air conditioning system Download PDFInfo
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- CN115875316A CN115875316A CN202211599823.1A CN202211599823A CN115875316A CN 115875316 A CN115875316 A CN 115875316A CN 202211599823 A CN202211599823 A CN 202211599823A CN 115875316 A CN115875316 A CN 115875316A
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- fan blade
- driving
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- frame body
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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
Abstract
The invention discloses a fan blade noise reduction method, a fan blade device and an air conditioning system, wherein the fan blade device comprises a fan blade, a power source, a monitoring module and a driving module, wherein the power source is connected with the fan blade and is used for driving the fan blade to rotate; the monitoring module is used for monitoring set indexes of the fan blades; the driving module acts on the fan blade and is used for driving the fan blade to move towards the power source when the set index reaches a set threshold value so as to enhance the torsional rigidity of a transmission part between the power source and the fan blade. The fan blade device can automatically reduce and remove noise when the axial flow fan blade generates noise, avoids the condition that the rest of a user is influenced by loud sound of the fan blade during operation, and improves the user experience.
Description
Technical Field
The invention relates to the technical field of noise reduction, in particular to a fan blade noise reduction method, a fan blade device and an air conditioning system applying the fan blade device.
Background
An air conditioner is a common household appliance, which is mainly used to regulate indoor temperature. The air conditioner comprises an outdoor unit, wherein the outdoor unit is placed outdoors and used for cooling and radiating high-temperature and high-pressure media generated by the indoor unit. The outdoor unit comprises the axial flow fan blade, and in the related art, the axial flow fan blade has high noise in use, so that the use experience of a user is reduced.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides the fan blade device which can automatically reduce and eliminate noise when the axial flow fan blade generates noise, so that the condition that the rest of a user is influenced by loud sound of the fan blade during operation is avoided, and the user experience is improved.
The embodiment of the invention also provides a fan blade noise reduction method based on the fan blade device.
The embodiment of the invention also provides an air conditioning system applying the fan blade device.
The fan blade device of the embodiment of the invention comprises:
a fan blade;
the power source is connected with the fan blades and is used for driving the fan blades to rotate;
the monitoring module is used for monitoring set indexes of the fan blades;
the driving module acts on the fan blade and is used for driving the fan blade to move towards the power source when the set index reaches a set threshold value so as to enhance the torsional rigidity of a transmission part between the power source and the fan blade.
The fan blade device provided by the embodiment of the invention can automatically reduce and eliminate noise when the axial flow fan blade generates noise, so that the condition that the rest of a user is influenced by loud sound of the fan blade during operation is avoided, and the user experience is improved.
In some embodiments, the drive module comprises:
the power source comprises a driving shaft, the pipe can conduct magnetism and is assembled on the outer periphery of the driving shaft in a threaded mode, and the fan blade is assembled on the outer periphery of the pipe in a rotation stopping mode;
and the coil is used for driving the pipe fitting to rotate after being electrified so as to drive the fan blade to move towards the power source.
In some embodiments, the driving module includes a frame body provided with a fitting hole in which a portion of the pipe is fitted, and the coil is fitted around an outer circumferential side of the frame body.
In some embodiments, the fan blade device includes a housing, the frame body is connected to the housing, the housing is provided with a vent hole through which an airflow outside the housing flows into the housing, and the monitoring module is disposed in the housing.
In some embodiments, one of the frame body and the driving shaft is provided with an insertion portion, the other one of the frame body and the driving shaft is provided with a slot, the insertion portion is inserted and matched in the slot, and the insertion portion can rotate around the axial direction of the driving shaft in the slot.
In some embodiments, the blade device includes a rod disposed in the mounting hole, one end of the rod is connected to the frame, one of the insertion portion and the slot is disposed at the other end of the rod, and a portion of the tube surrounds an outer circumference of the rod.
In some embodiments, the torsional stiffness is predicted by the following equation:
k T ＝2πω T 2 ·J T
in the formula: k is a radical of T Torsional stiffness for the drive shaft; omega T Is the natural frequency of the torsional mode of the driving shaft; j is a unit of T Is the moment of inertia of the drive shaft; m is the mass of the drive shaft; r is the radius of the drive shaft; ρ is the density of the drive shaft; l is the torsional distance of the drive shaft.
In some embodiments, the monitoring module includes a plurality of microphones, the plurality of microphones are arranged opposite to the fan blade, and the plurality of microphones are arranged at intervals along the circumference of the fan blade.
The fan blade noise reduction method provided by the embodiment of the invention comprises the following steps of:
monitoring the noise of the fan blade during operation;
and if the monitored set index of the noise reaches a first set threshold value, driving the fan blade to move towards the power source until the set index of the noise is smaller than a second set threshold value.
In some embodiments, the set indicator comprises at least one of: decibel, frequency.
The air conditioning system provided by the embodiment of the invention comprises the fan blade device in any one of the embodiments.
In some embodiments, the air conditioning system includes an outdoor unit, and the fan blade device is disposed in the outdoor unit.
Drawings
Fig. 1 is an exploded schematic view of a fan blade device according to an embodiment of the present invention.
Fig. 2 is an assembled perspective view of the driving module of fig. 1.
Fig. 3 is a side view of the drive module of fig. 2.
Fig. 4 is a schematic right view of the drive module of fig. 2.
Fig. 5 isbase:Sub>A schematic cross-sectional view atbase:Sub>A-base:Sub>A in fig. 4.
Fig. 6 is a right-side schematic view of an assembled fan blade device according to an embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view at B-B in fig. 6.
Fig. 8 is a partially enlarged schematic view at a in fig. 7.
Fig. 9 is a schematic flow chart of a fan blade noise reduction method according to an embodiment of the present invention.
Reference numerals:
a fan blade 1;
a power source 2; a drive shaft 21; a slot 211;
a monitoring module 3;
a drive module 4; a pipe member 41; a frame body 42; a fitting hole 421; a rod body 422; a plug portion 423; a coil 43; the projection 431;
a housing 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 8, the fan blade device according to the embodiment of the present invention includes a fan blade 1, a power source 2, a monitoring module 3, and a driving module 4.
As shown in fig. 1, the fan blade 1 may be an axial flow fan blade, the fan blade 1 includes a plurality of blades circumferentially arranged at intervals, and when the fan blade 1 rotates, the air flow on one side can be blown to the other side, thereby realizing ventilation and heat dissipation.
The power source 2 is connected to the fan blade 1 and is used for driving the fan blade 1 to rotate, for example, the power source 2 may be a motor, a hydraulic motor, or the like. As shown in fig. 1, the power source 2 may be disposed on the left side of the fan blade 1, the driving shaft 21 of the power source 2 may be in transmission connection with the fan blade 1, and the power source 2 may provide power for the rotation of the fan blade 1, thereby facilitating the rotational driving of the fan blade 1.
The monitoring module 3 may be disposed on the power source 2, or may be disposed on other components, and the monitoring module 3 may receive or sense sound waves, for example, the monitoring module 3 may be a microphone, the monitoring module 3 may monitor loudness (set index) of sound generated by the fan blade 1 during movement, the monitored information may be transmitted to the processing module, and the processing module may be a PLC control system or some other common control device or processing device. The processing module can analyze the monitored sound and judge whether the loudness of the sound exceeds the standard or not.
The driving module 4 acts on the fan blade 1, and the driving module 4 is used for driving the fan blade 1 to move towards the power source 2 when the set index reaches the set threshold value so as to enhance the torsional rigidity of a transmission part between the power source 2 and the fan blade 1.
Specifically, the driving module 4 is a driving device of an electric push rod, a telescopic cylinder and the like, the driving module 4 can be connected with the fan blade 1 and can drive the fan blade 1 to move in the left-right direction, and the fan blade 1 can rotate relative to the driving module 4, so that the requirement that the power source 2 drives the fan blade 1 to rotate is met. For example, the driving module 4 may be disposed on the right side of the fan blade 1, the position of the fan blade 1 in the left-right direction may be adjusted by extending and retracting the driving module 4, and the left ends of the fan blade 1 and the driving module 4 may be rotatably assembled.
When the sound loudness monitored by the monitoring module 3 exceeds the standard (that is, the set index reaches the set threshold), the driving module 4 can operate and drive the fan blade 1 to move towards one side of the left side (towards the power source 2), so that the distance between the fan blade 1 and the power source 2 is reduced, and the torsional rigidity of the transmission part between the power source 2 and the fan blade 1 is increased due to the reduction of the distance, thereby avoiding the situation that the fan blade 1 is easy to shake up and down to cause larger noise when the torsional rigidity is small, and enabling the whining sound of the fan blade 1 to disappear under the condition of the rotating speed of the current motor (the power source 2).
The fan blade device provided by the embodiment of the invention can automatically reduce and remove noise when the axial flow fan blade 1 generates noise, so that the condition that the rest of a user is influenced by loud sound of the fan blade 1 during operation is avoided, and the user experience is improved.
In some embodiments, the driving module 4 includes a tube 41 and a coil 43, the power source 2 includes the driving shaft 21, the tube 41 is magnetically conductive and is screwed to an outer circumferential side of the driving shaft 21, the fan blade 1 is fixed to the outer circumferential side of the tube 41, and the coil 43 is configured to drive the tube 41 to rotate after being powered on to drive the fan blade 1 to move toward the power source 2.
As shown in fig. 1 to 5, the pipe 41 may be a circular pipe, an internal thread may be provided in the pipe 41, an external thread may be provided on the driving shaft 21 of the power source 2, and the pipe 41 may be sleeved on an outer circumferential side of the driving shaft 21 and threadedly engaged with the driving shaft 21. The fan blade 1 may be fixed on the outer periphery of the pipe 41, for example, the fan blade 1 may be fixed on the outer periphery of the pipe 41 by a key fit, and in some other embodiments, the fan blade 1 may be fixed on the outer periphery of the pipe 41 by adhesion, fastening, and the like. The pipe 41 may be made of a magnetic conductive material, for example, the material of the pipe 41 may be magnetic steel.
The coil 43 may be an electromagnetic coil, and the coil 43 may be wound around the outer peripheral side of the pipe 41. When the fan blade 1 is used, current can be introduced into the coil 43, therefore, the coil 43 can generate a magnetic field, the pipe fitting 41 can generate a torque effect under the action of the magnetic field and can spirally move leftwards around the driving shaft 21, and the fan blade 1 can be driven to approach the power source 2.
The magnetic conduction of the pipe 41 and the design of the coil 43 realize the non-contact driving of the pipe 41, that is, when current is not introduced into the coil 43, the pipe 41 has higher freedom of movement, the problem that the pipe 41 needs to consider connection constraint when realizing the movement driving in the left and right directions through other modes is avoided, the condition of interference with the driving of the power source 2 is avoided, the structure is simplified, and the failure rate is reduced.
It should be noted that in this embodiment, the spiral directions of the threads of the pipe 41 and the driving shaft 21 can be designed such that the driving shaft 21 can make the pipe 41 move synchronously with the driving shaft 21 when rotating to one side, and the coil 43 can drive the pipe 41 to rotate along the spiral of the threads on the driving shaft 21, so as to realize the spiral movement driving of the pipe 41.
In some embodiments, the driving module 4 includes a frame body 42, the frame body 42 is provided with a fitting hole 421, a part of the pipe 41 is fitted in the fitting hole 421, and the coil 43 is fitted on an outer circumferential side of the frame body 42.
For example, as shown in fig. 1 and 5, the frame body 42 may be a generally tubular structure, and the inner cavity of the frame body 42 forms a mounting hole 421. The right end of the frame body 42 can be fixed, that is, the right end of the frame body 42 can be fixed on other components, and the left end of the frame body 42 can be in a suspension state.
During assembly, as shown in fig. 5, the coil 43 may be fixed to the outer circumferential side of the frame body 42, a portion of the pipe 41 may be inserted into and clearance-fitted into the fitting hole 421 of the frame body 42, and a portion of the pipe 41 inserted into the fitting hole 421 in the inward and outward directions of the pipe 41 corresponds to the coil 43, thereby ensuring that the pipe 41 is within the range of the magnetic field generated by the coil 43 when energized and facilitating the installation and fixation of the coil 43.
Alternatively, as shown in fig. 4, a protrusion 431 may be provided below the coil 43, and the protrusion 431 is used for leading out a wire, thereby facilitating connection of the coil 43 and a power supply.
In some embodiments, the fan blade device includes a housing 5, a frame 42 is connected to the housing 5, the housing 5 is provided with a vent for allowing the airflow outside the housing 5 to flow into the housing 5, and the monitoring module 3 is disposed on the housing 5.
For example, as shown in fig. 1, 6 to 8, the housing 5 has a grid structure, and the housing 5 may have vent holes uniformly distributed thereon, so as to meet the use requirement of air intake or air outtake. A part of the housing 5 may be located at the right side of the driving module 4, and the right end of the frame body 42 may be fixedly connected to the left side of the housing 5 by welding, bonding, fastening, or the like. The monitoring module 3 can be fixed on the shell 5, and the monitoring module 3 is right opposite to the fan blade 1 in the left and right directions, so that the monitoring accuracy is ensured.
In some embodiments, one of the frame body 42 and the driving shaft 21 is provided with an insertion portion 423, the other one of the frame body and the driving shaft 21 is provided with an insertion groove 211, the insertion portion 423 is inserted into the insertion groove 211, and the insertion portion 423 is rotatable in the insertion groove 211 around the axial direction of the driving shaft 21.
For example, as shown in fig. 5, the insertion portion 423 may be provided on the frame body 42, and the insertion groove 211 may be provided at the right end of the driving shaft 21. When assembled, the insertion portion 423 may be inserted into the insertion groove 211, so as to connect the frame body 42 and the driving shaft 21. Make the free end of drive shaft 21 and the free end of support body 42 overlap joint to can realize spacing each other in the vertical plane, easy luffing motion and crooked condition when having avoided drive shaft 21 and support body 42 suspension, promote the stability of structure, also be favorable to further amortization to fall and make an uproar.
It should be noted that the inserting portion 423 may be substantially conical, the inserting groove 211 may be a conical groove, and after the inserting portion 423 is inserted into the inserting groove 211, the inserting portion 423 may freely rotate in the inserting groove 211, so as to avoid interference with driving of the power source 2.
It is understood that in other embodiments, the insertion slot 211 may be disposed on the frame body 42, and the insertion portion 423 may be disposed on the driving shaft 21.
In some embodiments, the blade device includes a rod 422, the rod 422 is disposed in the assembling hole 421, one end of the rod 422 is connected to the frame body 42, one of the inserting portion 423 and the slot 211 is disposed at the other end of the rod 422, and a portion of the tube 41 surrounds an outer circumference of the rod 422.
As shown in fig. 5 and 8, the rod 422 may be integrally formed with the frame body 42, the rod 422 may be disposed in the mounting hole 421 of the frame body 42, and the rod 422 may extend along the central axis of the frame body 42. For example, the right end of the rod 422 may be connected to the frame 42, the left end of the rod 422 may be extended out of the left opening of the assembly hole 421, and the insertion part 423 may be integrally formed at the left end of the rod 422. When assembling, as shown in fig. 8, the right end of the tube 41 can extend into the assembling hole 421 and surround the outer circumference of the rod 422.
Therefore, the slot 211 and the inserting part 423 can be hidden in the pipe fitting 41, the situation that impurities easily enter between the slot 211 and the inserting part when the slots are exposed is avoided, and the sealing protection effect is achieved.
It will be appreciated that in other embodiments, frame 42 may be a tubular structure, rod 422 may be fixed to shell 5, and for example, the right end of rod 422 may extend from the right opening of mounting hole 421 of frame 42 and be connected to shell 5.
In some embodiments, the torsional stiffness of drive shaft 21 may be predicted by the following equation:
k T ＝2πω T 2 ·J T
in the formula: k is a radical of T Torsional rigidity of drive shaft 21; omega T Is the natural frequency of the torsional mode of drive shaft 21; j is a unit of T The moment of inertia of the drive shaft 21; m is the mass of the drive shaft 21; r is the radius of the drive shaft 21; ρ is the density of the drive shaft 21; l is the torsional distance of the drive shaft 21.
In some embodiments, the monitoring module 3 comprises a plurality of microphones, the plurality of microphones are arranged opposite to the impeller 1, and the plurality of microphones are arranged at intervals along the circumference of the impeller 1. As shown in fig. 1, the number of the microphones may be four, and in other embodiments, the number of the microphones may also be three, five, six, and so on. The plurality of microphones may be fixed to the left side of the housing 5, and the plurality of microphones may be provided on the circumferential side of the central axis of the fan blade 1 and arranged at equal intervals in the circumferential direction. The arrangement of a plurality of microphones can monitor the sound wave in different directions on the one hand, and on the other hand, errors can be eliminated, and the monitoring accuracy is improved.
The method for reducing the noise of the fan blade 1 according to the embodiment of the invention is described below.
The fan blade 1 noise reduction method provided by the embodiment of the invention comprises the following steps:
s1: and monitoring the noise of the fan blade 1 during operation. Specifically, as shown in fig. 9, when the power source 2 drives the fan blade 1 to rotate, the frequency domain characteristics of the sound waves generated by the operation of the fan blade 1 can be monitored by using a plurality of microphones,
s2: if the set index of the monitored noise reaches the first set threshold, the fan blade 1 is driven to move towards the power source 2 until the set index of the noise is smaller than the second set threshold.
Specifically, the set index may be a loudness of sound, that is, the fan blade 1 may generate a "whining" noise when operating, where a decibel of the noise generally exceeds a prescribed decibel value (a first set threshold), at this time, the driving module 4 may be started, that is, the coil 43 may be energized with a current and generate a magnetic field, and under the action of the magnetic field, the pipe 41 may move spirally leftward relative to the driving shaft 21, so as to play a role of fastening the pipe 41 and the fan blade 1, on the other hand, the fan blade 1 may be driven to move leftward, and the torsional rigidity of the transmission portion between the power source 2 and the fan blade 1 may be improved by shortening the distance between the fan blade 1 and the power source 2.
Along with the leftward movement of the fan blade 1, the whining sound of the fan blade 1 at the current rotating speed disappears (the set index is smaller than the second set threshold), so that the effect of eliminating noise is achieved. It should be noted that the blades 1 at different rotational speeds all generate a whining sound, and the blade 1 is moved leftward to shift the whining sound of the blade 1 to other rotational speeds, and disappears at the current rotational speed of the motor, that is, for different rotational speeds, the method of the embodiment of the present invention may all perform adaptive adjustment, implement periodic closed-loop control, and improve user experience.
It can be understood that the values of the first set threshold and the second set threshold may be the same or different, and when in use, a user may selectively determine the first set threshold or the second set threshold according to the self condition or the tolerance to noise.
Optionally, in some other embodiments, the monitoring module 3 may also monitor the frequency of the acoustic wave.
An air conditioning system of an embodiment of the present invention is described below.
The air conditioning system comprises an outdoor unit, wherein a fan blade device is arranged in the outdoor unit. By the fan blade device provided by the embodiment of the invention, the noise can be reduced and removed automatically when the air conditioning system operates, noise pollution is avoided, and the use experience of a user is improved.
It can be understood that the fan blade device of the embodiment of the invention can also be applied to equipment or systems which need to use the fan blade device, such as fans, cigarette machines and the like, and has the effects of noise reduction and noise reduction.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.
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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although the above embodiments have been shown and described, it should be understood that they are exemplary and should not be construed as limiting the present invention, and that many changes, modifications, substitutions and alterations to the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (12)
1. A fan blade device, characterized by, includes:
a fan blade;
the power source is connected with the fan blades and is used for driving the fan blades to rotate;
the monitoring module is used for monitoring set indexes of the fan blades;
the driving module acts on the fan blade and is used for driving the fan blade to move towards the power source when the set index reaches a set threshold value so as to enhance the torsional rigidity of a transmission part between the power source and the fan blade.
2. The fan blade apparatus of claim 1, wherein said drive module comprises:
the power source comprises a driving shaft, the pipe can conduct magnetism and is assembled on the outer periphery of the driving shaft in a threaded mode, and the fan blade is assembled on the outer periphery of the pipe in a rotation stopping mode;
and the coil is used for driving the pipe fitting to rotate after being electrified so as to drive the fan blade to move towards the power source.
3. The fan blade device according to claim 2, wherein the driving module comprises a frame body, the frame body is provided with an assembly hole, a part of the pipe fitting is fitted in the assembly hole, and the coil is sleeved on the outer peripheral side of the frame body.
4. The fan blade device according to claim 3, comprising a housing, wherein the frame body is connected to the housing, the housing is provided with a vent hole for allowing airflow outside the housing to flow into the housing, and the monitoring module is disposed in the housing.
5. The fan blade device as claimed in claim 3, wherein one of the frame body and the driving shaft is provided with an insertion portion, and the other one of the frame body and the driving shaft is provided with a slot, the insertion portion is inserted and fitted into the slot, and the insertion portion is rotatable in the slot around the axis direction of the driving shaft.
6. The fan blade device according to claim 5, comprising a rod body, wherein the rod body is disposed in the assembly hole, one end of the rod body is connected to the frame body, one of the insertion portion and the slot is disposed at the other end of the rod body, and a part of the pipe fitting surrounds an outer circumferential side of the rod body.
7. A fan blade apparatus as claimed in claim 2, wherein said torsional stiffness is predicted by the formula:
k T ＝2πω T 2 ·J T
in the formula: k is a radical of formula T Is the drive shaft torsional stiffness; omega T Is the drive shaft torsional mode natural frequency; j. the design is a square T Is the moment of inertia of the drive shaft; m is the mass of the drive shaft; r is the radius of the drive shaft; ρ is the density of the drive shaft; l is the torsional distance of the drive shaft.
8. The fan blade device according to any one of claims 1 to 7, wherein the monitoring module comprises a plurality of microphones, the plurality of microphones are arranged opposite to the fan blade, and the plurality of microphones are arranged at intervals along the circumference of the fan blade.
9. A fan blade noise reduction method based on the fan blade device of any one of claims 1 to 8, characterized by comprising the following steps:
monitoring the noise of the fan blade during operation;
and if the monitored set index of the noise reaches a first set threshold value, driving the fan blade to move towards the power source until the set index of the noise is smaller than a second set threshold value.
10. The fan blade noise reduction method according to claim 9, wherein the set index comprises at least one of: decibel, frequency.
11. An air conditioning system comprising a blade arrangement as claimed in any one of claims 1 to 8.
12. The air conditioning system of claim 11, comprising an outdoor unit, wherein the fan device is disposed in the outdoor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211599823.1A CN115875316A (en) | 2022-12-12 | 2022-12-12 | Fan blade noise reduction method, fan blade device and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211599823.1A CN115875316A (en) | 2022-12-12 | 2022-12-12 | Fan blade noise reduction method, fan blade device and air conditioning system |
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|---|---|
| CN115875316A true CN115875316A (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211599823.1A Pending CN115875316A (en) | 2022-12-12 | 2022-12-12 | Fan blade noise reduction method, fan blade device and air conditioning system |
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| CN (1) | CN115875316A (en) |
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- 2022-12-12 CN CN202211599823.1A patent/CN115875316A/en active Pending
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