CN215446844U - Perforated plate silencing device, silencing control system and air conditioner - Google Patents
Perforated plate silencing device, silencing control system and air conditioner Download PDFInfo
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- CN215446844U CN215446844U CN202121264757.3U CN202121264757U CN215446844U CN 215446844 U CN215446844 U CN 215446844U CN 202121264757 U CN202121264757 U CN 202121264757U CN 215446844 U CN215446844 U CN 215446844U
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Abstract
The utility model relates to a perforated plate noise eliminator, noise elimination control system and air conditioner, perforated plate noise eliminator is including having fenestrate first plate body, the second plate body, form the cavity between first plate body and the second plate body, the setting is on first plate body and at the inside magnetic part of cavity, the setting is on the second plate body and at the inside electro-magnet of cavity, and the guide rail of connecting first plate body and second plate body, the electro-magnet produces magnetic force with the magnetic part under the on-state, so that first plate body and/or second plate body are close to each other or keep away from along the guide rail under magnetic force, change the cavity distance. The space can be practiced thrift in this application, through changing the cavity apart from the resonant frequency who initiatively changes the perforated plate, realizes all having good sound absorption effect under multiple mode.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to a perforated plate silencing device, a silencing control system and an air conditioner.
Background
Air conditioners play an important role in daily life, and air conditioner bellows or screw compressors generate noise due to exhaust and gas compression and relative moving parts in the working process. At present, a silencing device installed in an air conditioning system mainly takes a perforated plate as a main part, the perforated plate is perforated on various thin plates, and a cavity is arranged behind the perforated plate, namely, the resonance sound absorption structure with a plurality of Helmholtz resonators connected in parallel is adopted.
In the related art, the method of controlling the sound absorption frequency by changing the aperture ratio of the two ends of the sound absorption hole or arranging a broadband perforated plate, wherein two cavity bodies are arranged on the back plate, another cavity body is arranged between every two adjacent cavity bodies of the same kind, and the distances between the cavity bodies of different kinds and the back plate are different, so that the number of resonance frequencies is increased, and the broadband sound absorption effect is achieved; although the methods can improve the sound absorption performance, the pore canal and the cavity of the silencing device can not be adjusted once being processed, the unadjustable cavity can not only cause space waste, and meanwhile, the air conditioner can generate main contribution noise frequencies in different frequency band ranges under different working modes, but the silencing device can not absorb the main contribution noise of a plurality of different frequency bands, thereby influencing the silencing effect.
SUMMERY OF THE UTILITY MODEL
For overcoming traditional noise eliminator to at least a certain extent because pore and cavity size can not be adjusted, cause the extravagant problem in space, this application provides a perforated plate noise eliminator, noise elimination control system and air conditioner.
In a first aspect, the present application provides a perforated plate muffling device comprising:
the first plate body and the second plate body are provided with through holes, and a cavity is formed between the first plate body and the second plate body;
the magnetic component is arranged on the first plate body and inside the cavity, the electromagnet is arranged on the second plate body and inside the cavity, and the guide rail is connected with the first plate body and the second plate body;
the electromagnet generates magnetic force with the magnetic component in the electrified state, so that the first plate body and/or the second plate body are close to or far away from each other along the guide rail under the action of the magnetic force, and the distance of the cavity is changed.
Further, the electro-magnet is the positive adjustable electro-magnet of electric current size and electric current, the electro-magnet under the on-state with magnetic part produces magnetic force to make first plate body slide along the guide rail under the magnetic force effect, change the cavity distance, include:
the electromagnet generates attraction with the magnetic component in a power-on state, so that the first plate body slides towards the direction close to the second plate body along the guide rail under the action of the attraction, and the distance of the cavity is reduced;
alternatively, the first and second electrodes may be,
the electromagnet and the magnetic component generate repulsive force in the energized state, so that the first plate body slides towards the second plate body along the guide rail under the action of the repulsive force, and the distance of the cavity is increased.
Further, the magnetic component is a ferromagnetic component, and the electromagnet generates an attraction force with the magnetic component in an electrified state.
Furthermore, an elastic connecting structure is arranged between the electromagnet and the ferromagnetic component,
when the electromagnet and the magnetic component generate attraction force in a power-on state which is larger than the elastic force generated by the elastic connecting structure, the first plate body slides along the guide rail to the direction close to the second plate body, and the distance of the cavity is reduced;
when the electromagnet and the magnetic component generate attraction force in a power-on state, which is smaller than the elastic force generated by the elastic connection structure, the first plate body slides along the guide rail in the direction away from the second plate body, so that the cavity distance is increased.
Further, the elastic connection structure is a spring.
Further, the method also comprises the following steps:
and the porous sound absorption material is arranged on one surface, close to the second plate body, of the first plate body with the through holes.
Further, a linear bearing with a circular flange is further arranged on the guide rail, and the circular flange is connected with the first plate body, so that the first plate body and the porous sound absorption material are connected with the guide rail and move along the axial direction of the guide rail.
Further, the method also comprises the following steps:
and the circular flange is connected with the first plate body through bolts.
Further, the first perforated plate body includes: a plurality of perforations, the plurality of perforations are in a square arrangement.
In a second aspect, the present application provides a muffling control system comprising:
a perforated plate muffling device, a noise collection and analysis device and a controller according to the first aspect;
the noise acquisition and analysis device is used for acquiring the noise frequency of the airflow, converting the acquired real-time noise frequency signal into a corresponding electric signal and sending the corresponding electric signal to the controller;
and the controller adjusts the direction and the size of the electrified current of the electromagnet in the perforated plate silencing device according to the corresponding electric signal of the real-time noise frequency signal.
In a third aspect, the present application provides an air conditioner comprising:
the sound damping control system according to the second aspect.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the perforated plate silencing device comprises a first plate body with a through hole, a second plate body, a cavity formed between the first plate body and the second plate body, a magnetic part arranged on the first plate body and in the cavity, an electromagnet arranged on the second plate body and in the cavity, and a guide rail connected with the first plate body and the second plate body, wherein the electromagnet and the magnetic part generate magnetic force under the electrified state, so that the first plate body and/or the second plate body are close to or far away from each other along the guide rail under the action of the magnetic force, the distance of the cavity is changed, the space is saved, the resonant frequency of the perforated plate is actively changed by changing the distance of the cavity, and the perforated plate silencing device has a good sound absorption effect under various working modes.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a functional structure diagram of a perforated plate muffler device according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a perforated plate silencer according to another embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a square arrangement of through holes according to an embodiment of the present application.
Fig. 4 is a functional block diagram of a noise cancellation control system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a functional block diagram of a perforated plate muffler device according to an embodiment of the present invention, and as shown in fig. 1, the perforated plate muffler device includes:
a first plate body 11 and a second plate body 12 with through holes, wherein a cavity is formed between the first plate body 11 and the second plate body 12;
a magnetic component 13 arranged on the first plate body 11 and in the cavity, an electromagnet 14 arranged on the second plate body 12 and in the cavity, and a guide rail 15 connecting the first plate body 11 and the second plate body 12;
the electromagnet 14 and the magnetic component 13 generate magnetic force when being powered on, so that the first board body 11 and/or the second board body 12 are close to or far away from each other along the guide rail 15 under the action of the magnetic force, and the cavity distance is changed.
As shown in fig. 3, the perforated plate resonance frequency calculation formula is as follows:
in the formula: d is the cavity distance; t is the thickness of the perforated plate; d is the aperture of the first plate body with the through hole; c is the speed of sound; p is a perforation rate (perforation area/full area 100%).
The perforated first plate body 11 is equivalent to a resonance sound absorption structure with a plurality of helmholtz resonators connected in parallel, and when the frequency of incident sound waves is consistent with the resonance frequency of the perforated first plate body, the air in the perforated hole neck can generate vibration friction, so that a good sound absorption effect is achieved. From the above formula, it can be seen that the resonance frequency f of the perforated plate0Inversely proportional to the square root of the cavity distance D, when the cavity distance is varied, the resonant frequency of the perforated plate is also varied accordingly. When the air conditioner works in different modes, the frequency bands mainly contributing to noise are different, different control currents are transmitted to the electromagnet 14, and the electromagnet and the magnetic part 13 generate mutually attractive or repulsive magnetic forces with different magnitudes, so that the first plate body 11 or the second plate body 12 axially moves along the guide rail 15, the cavity distance D is changed, the resonant frequency of the perforated plate silencer is changed, namely, the sound absorption frequency range is actively adjusted, the absorption peak frequency is changed, and the air conditioner noise is effectively absorbed.
In the related muffling technology of perforated plates, a method for controlling sound absorption frequency by changing the aperture ratio of two ends of a sound absorption hole is adopted, or a broadband perforated plate is arranged, two cavity bodies are arranged on a back plate of the perforated plate, another cavity body is arranged between every two adjacent cavity bodies of the same type, the distances between the cavity bodies of different types and the back plate are different, the number of resonance frequencies is increased, and the broadband sound absorption effect is achieved; although the methods can improve the sound absorption performance, the pore canal and the cavity of the silencing device can not be adjusted once being processed, the unadjustable cavity can not only cause space waste, and meanwhile, the air conditioner can generate main contribution noise frequencies in different frequency band ranges under different working modes, but the silencing device can not absorb the main contribution noise of a plurality of different frequency bands, thereby influencing the silencing effect.
In this embodiment, perforated plate noise eliminator is including having fenestrate first plate body, the second plate body, form the cavity between first plate body and the second plate body, set up on first plate body and at the inside magnetic part of cavity, set up on the second plate body and at the inside electro-magnet of cavity, and the guide rail of connecting first plate body and second plate body, the electro-magnet produces magnetic force with magnetic part under the on-state, so that first plate body or second plate body are close to each other or keep away from along the guide rail under magnetic force, change the cavity distance, practice thrift the space, through changing the resonant frequency that cavity distance initiative changed the perforated plate, the realization all has good sound absorption effect under multiple mode.
Fig. 2 is a schematic structural diagram of a perforated plate muffler device according to another embodiment of the present invention, and as shown in fig. 2, the perforated plate muffler device includes:
the first plate body 21 and the second plate body 22 are provided with through holes, and a cavity is formed between the first plate body 21 and the second plate body 22;
a magnetic member 23 provided on the first plate 21 and inside the cavity, an electromagnet 24 provided on the second plate 22 and inside the cavity, and a guide rail 25 connecting the first plate 21 and the second plate 22;
the magnetic component 23 is a ferromagnetic component, the electromagnet 24 generates attraction force with the magnetic component 23 in a power-on state, an elastic connecting structure 26 is arranged between the electromagnet 24 and the ferromagnetic component,
when the attraction force is larger than the elastic force generated by the elastic connecting structure 26, the first plate body 21 slides along the guide rail 25 to the direction close to the second plate body 22, so that the cavity distance is reduced;
when the attraction force is smaller than the elastic force generated by the elastic connecting structure 26, the first plate 21 slides along the guide rail 25 in the direction away from the second plate 22, so that the cavity distance is increased.
In some embodiments, the resilient connecting structure 26 is a spring.
In some embodiments, the electromagnet 24 is an electromagnet with adjustable current magnitude and current positive and negative, and the electromagnet 24 generates a magnetic force with the magnetic component 23 when in the energized state, so that the first board body 21 slides along the guide rail 25 under the action of the magnetic force, so as to change the cavity distance, including:
the electromagnet 24 and the magnetic component 23 generate attraction force in the energized state, so that the first plate body 21 slides along the guide rail 25 to the direction close to the second plate body 22 under the action of the attraction force, and the cavity distance is reduced;
alternatively, the first and second electrodes may be,
the electromagnet 24 generates a repulsive force with the magnetic member 23 in an energized state, so that the first board body 21 slides along the guide rail 25 toward the second board body 22 under the repulsive force, and the cavity distance is increased.
By adjusting the distance of the cavity, the resonant frequency of the perforated plate is actively changed, namely the size of the absorption peak frequency is changed, and further the main contribution noise in different frequency band ranges is reduced.
The embodiment further comprises the following steps:
and a porous sound absorbing material 27, wherein the porous sound absorbing material 27 is arranged on one surface of the first plate body 21 with the through holes, which is close to the second plate body 22.
Since the porous sound-absorbing material 27 is disposed on the first plate body 21 with the through-holes, the porous sound-absorbing material 27 affects the sound-absorbing coefficient and the sound-absorbing frequency bandwidth, and therefore, after the porous sound-absorbing material 27 is disposed behind the first plate body 21 with the through-holes, the through-hole rate of the whole sound-absorbing structure is increased, the sound-absorbing coefficient is increased, the acoustic impedance is increased, the resonance sound-absorbing coefficient is increased, and the effective sound-absorbing frequency band range is widened.
The guide rail 25 is further provided with a linear bearing having a circular flange connected to the first plate body 21 so that the first plate body 21 and the porous sound-absorbing material 27 are connected to the guide rail 25 and move axially along the guide rail.
In some embodiments, further comprising:
the bolts, the circular flange, are connected with the first plate body 21 by bolts.
The first plate body 21 and the porous sound-absorbing material 27 can be connected with the guide rail 25 by arranging the guide rail and can move along the axial direction of the guide rail, so that the moving reliability of the first plate body 21 is improved.
In some embodiments, the perforated first plate 21 comprises: a plurality of perforations, the plurality of perforations are in a square arrangement.
As shown in fig. 3, the noise frequency can be uniformly absorbed by adopting the square arrangement mode, and the noise elimination effect is prompted.
In this embodiment, through setting up porous sound absorbent, increase resonance sound absorption coefficient to and widen effective sound absorption frequency band scope, so that the noise that the air conditioner produced can be with greatly reduced, and then improve the whole noise level of air conditioner.
Fig. 4 is a schematic structural diagram of a sound attenuation control system according to an embodiment of the present application, where as shown in fig. 4, the sound attenuation control system includes:
a perforated plate muffler device 41, a noise collection and analysis device 42, and a controller 43 as described in the above embodiments;
the noise acquisition and analysis device 42 is used for acquiring the noise frequency of the airflow, converting the acquired real-time noise frequency signal into a corresponding electric signal and sending the corresponding electric signal to the controller;
the noise collection and analysis device 42 is, for example, a noise data collection control unit in the AWA6218J environmental noise monitoring system.
The controller 43 adjusts the direction and magnitude of the current applied to the electromagnet in the perforated plate muffling device 41 according to the corresponding electrical signal of the real-time noise frequency signal.
In this embodiment, noise acquisition and analysis unit gathers the analysis and obtains noise frequency, turns into the signal of telecommunication with the noise frequency signal of gathering, sends for the controller, and after the corresponding signal of telecommunication was received to the controller, the initiative control perforated plate noise eliminator silenced, and then the noise reduction, promotion user experience travelling comfort.
The present embodiment provides an air conditioner including: the sound damping control system as described above.
When the air conditioner is in different working modes, main contribution noises in different frequency range can be generated, the existing noise elimination device in the air conditioner can only realize noise elimination of specific frequency, and when the frequency of the main contribution noises is changed, a good noise elimination effect cannot be achieved, so that the user experience and the comfort are influenced. After the air conditioner air box or the sound-proof cover of the screw compressor is provided with the perforated plate sound-absorbing device with the active adjustable sound-absorbing frequency, the sound-absorbing device can actively adjust the cavity distance according to the main contribution noise frequency generated by the air conditioner in different working modes, change the resonance peak frequency of the sound-absorbing device and absorb the main contribution noise of different frequency bands; meanwhile, the porous sound absorption material is placed behind the perforated plate, so that the resonance sound absorption coefficient is increased, and the effective sound absorption frequency band range is widened, so that the noise is more effectively absorbed.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 application. 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 application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
It should be noted that the present invention is not limited to the above-mentioned preferred embodiments, and those skilled in the art can derive other products in various forms without departing from the scope of the present invention, but any changes in shape or structure can be made within the scope of the present invention with the same or similar technical solutions as the present invention.
Claims (11)
1. A perforated plate muffling device, comprising:
the first plate body and the second plate body are provided with through holes, and a cavity is formed between the first plate body and the second plate body;
the magnetic component is arranged on the first plate body and inside the cavity, the electromagnet is arranged on the second plate body and inside the cavity, and the guide rail is connected with the first plate body and the second plate body;
the electromagnet generates magnetic force with the magnetic component in the electrified state, so that the first plate body and/or the second plate body are close to or far away from each other along the guide rail under the action of the magnetic force, and the distance of the cavity is changed.
2. The perforated plate muffler device according to claim 1, wherein the electromagnet is an electromagnet with adjustable current and adjustable current, and the electromagnet generates a magnetic force with the magnetic member when the electromagnet is in an energized state, so that the first plate slides along the guide rail under the action of the magnetic force to change the distance of the cavity, and the perforated plate muffler device comprises:
the electromagnet generates attraction with the magnetic component in a power-on state, so that the first plate body slides towards the direction close to the second plate body along the guide rail under the action of the attraction, and the distance of the cavity is reduced;
alternatively, the first and second electrodes may be,
the electromagnet and the magnetic component generate repulsive force in the energized state, so that the first plate body slides towards the second plate body along the guide rail under the action of the repulsive force, and the distance of the cavity is increased.
3. The perforated plate muffling device of claim 1, wherein the magnetic component is a ferromagnetic component, and wherein the electromagnet, when energized, creates an attractive force with the ferromagnetic component.
4. The perforated plate muffling device of claim 3, wherein an elastic connection structure is further disposed between the electromagnet and the ferromagnetic member,
when the electromagnet and the ferromagnetic component generate attraction force in a power-on state which is larger than the elastic force generated by the elastic connecting structure, the first plate body slides along the guide rail to the direction close to the second plate body, and the distance of the cavity is reduced;
when the electromagnet and the ferromagnetic component generate attraction force in a power-on state and the attraction force is smaller than the elastic force generated by the elastic connecting structure, the first plate body slides along the guide rail in the direction far away from the second plate body, and the cavity distance is increased.
5. The perforated plate muffling device of claim 4, wherein the resilient connecting structure is a spring.
6. The perforated plate muffling device of claim 1, further comprising:
and the porous sound absorption material is arranged on one surface, close to the second plate body, of the first plate body with the through holes.
7. The perforated plate muffling device of claim 6, wherein the guide rail further comprises a linear bearing having a circular flange, the circular flange being coupled to the first plate such that the first plate and the porous sound absorbing material are coupled to the guide rail and move axially along the guide rail.
8. The perforated plate muffling device of claim 7, further comprising:
and the circular flange is connected with the first plate body through bolts.
9. The perforated plate muffling device of claim 1, wherein the perforated first plate comprises: a plurality of perforations, the plurality of perforations are in a square arrangement.
10. A sound damping control system, comprising: a perforated plate muffling device according to any one of claims 1 to 9, a noise collection and analysis device, and a controller;
the noise acquisition and analysis device is used for acquiring the noise frequency of the airflow, converting the acquired real-time noise frequency signal into a corresponding electric signal and sending the corresponding electric signal to the controller;
and the controller adjusts the direction and the size of the electrified current of the electromagnet in the perforated plate silencing device according to the corresponding electric signal of the real-time noise frequency signal.
11. An air conditioner, comprising: the sound damping control system of claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121264757.3U CN215446844U (en) | 2021-06-07 | 2021-06-07 | Perforated plate silencing device, silencing control system and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121264757.3U CN215446844U (en) | 2021-06-07 | 2021-06-07 | Perforated plate silencing device, silencing control system and air conditioner |
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| CN215446844U true CN215446844U (en) | 2022-01-07 |
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| CN202121264757.3U Active CN215446844U (en) | 2021-06-07 | 2021-06-07 | Perforated plate silencing device, silencing control system and air conditioner |
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