CN115027199A - Silencer, preparation method of silencer, air conditioner and automobile - Google Patents

Abstract

The silencer comprises a shell, an inner container and a power supply device, wherein a first cavity is formed in the shell, the inner container is made of piezoelectric materials, the inner container is arranged in the first cavity, and the power supply device is electrically connected with the inner container. According to the silencer, the inner container is laid on the inner wall of the silencer and made of the piezoelectric material, and the inverse piezoelectric effect of the piezoelectric material is utilized, namely the inner container laid inside the silencer is electrified, so that the inner container deforms towards the central position of the silencer, the purpose of adjusting the length and the expansion ratio of the expansion cavity inside the silencer can be achieved, the continuous adjustment of the silencing quantity of the silencer is realized, the silencing quantity is increased under the condition that the structural shape of the silencer is not changed, and the silencing performance of the silencer is improved.

Description

Silencer, preparation method of silencer, air conditioner and automobile

Technical Field

The disclosure relates to the technical field of vibration and noise reduction, in particular to a silencer, a manufacturing method of the silencer, an air conditioner and an automobile.

Background

With the improvement of living environment, the requirements of people on the quality of living environment are higher and higher, and the tolerance to environmental pollution is lower and lower. Among them, noise pollution is an environmental pollution which is very common in life.

The silencer is a device which allows airflow to pass through and can prevent or reduce sound transmission, is an important measure for eliminating aerodynamic noise, is widely applied to various aspects of production and life, and is also an important way for practitioners to develop and improve to improve silencing efficiency and reduce pollution.

In the prior art, the structure of the silencer is limited by the production process and the use space, so that the expansion ratio design is limited, and the silencing effect is limited.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a silencer, a method of manufacturing the silencer, an air conditioner, and an automobile.

According to a first aspect of embodiments of the present disclosure, there is provided a muffler comprising: the device comprises a shell, a first cavity and a second cavity, wherein the first cavity is arranged in the shell; the inner container is made of a piezoelectric material and is arranged in the first cavity; and the power supply device is electrically connected with the inner container.

In some embodiments, the size of the inner container corresponds to the size of the first cavity in the length direction of the shell.

In some embodiments, the number of the inner containers is multiple, and the multiple inner containers are arranged in the first cavity along the length direction of the shell.

In some embodiments, the number of the power supply devices is multiple, and the multiple power supply devices are arranged in one-to-one correspondence with the multiple inner containers.

In some embodiments, the housing is in the shape of a circular tube, the first cavity is cylindrical, and the inner container is in the shape of a circular ring.

In some embodiments, a first power supply line and a second power supply line are provided on the power supply, the first power supply line and the second power supply line being provided on the inner container.

In some embodiments, the first power supply line and the second power supply line are symmetrically arranged on the circumferential surface of the inner container in the radial direction of the inner container.

In some embodiments, the first power supply line and the second power supply line are symmetrically disposed on an end surface of the inner container in an axial direction of the inner container.

In some embodiments, the housing is made of a piezoelectric material, and the power supply is electrically connected to the housing.

In some embodiments, the shell and the inner bladder are integrally formed.

According to a second aspect of embodiments of the present disclosure, there is provided a method of manufacturing a muffler, including: preparing a shell of the silencer; laying an inner container on the inner wall of the shell, wherein the inner container is made of a piezoelectric material; and electrically connecting a power supply with the inner container.

According to a third aspect of embodiments of the present disclosure, there is provided an air conditioner including a silencer according to any one of the embodiments of the present disclosure.

According to a fourth aspect of embodiments of the present disclosure, there is provided an automobile comprising a muffler as in any one of the embodiments of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the inner container is laid on the inner wall of the silencer and made of the piezoelectric material, and the inverse piezoelectric effect of the piezoelectric material is utilized, namely the inner container laid inside the silencer is electrified, so that the inner container deforms towards the center of the silencer, the purpose of adjusting the length and the expansion ratio of an expansion cavity inside the silencer can be achieved, the continuous adjustment of the silencing quantity of the silencer is realized, the silencing quantity is increased under the condition that the structural appearance of the silencer is not changed, and the silencing performance of the silencer is improved.

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 disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic view of a muffler shown in accordance with an exemplary embodiment.

FIG. 2 is another schematic view of a muffler shown in accordance with an exemplary embodiment.

FIG. 3 is a schematic illustration of the deformation of the inner bladder at various locations in the muffler, according to an exemplary embodiment.

Fig. 4 is a graph of transmission loss simulations for the different silencers of fig. 3.

FIG. 5 is another schematic illustration of the deformation of the inner bladder in a different position in the muffler, according to an exemplary embodiment.

Fig. 6 is a graph of a simulation of transmission loss for the different mufflers of fig. 5.

Reference numerals are as follows:

100: muffler, 10: a housing, 11: first cavity, 20: inner container, 30: power supply, 31: first power supply line, 32: a second supply line.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosure, as detailed in the scope of the claims.

In the prior art, the structure of the silencer is particularly limited by the production process and the use space, so that the expansion ratio design is limited and the silencing effect is limited.

The effectiveness of the silencer is mainly reflected in the optimal silencing frequency position and the size of silencing quantity, and the silencing performance of the silencer is mainly determined by the length of the expansion cavity and the expansion ratio.

The structural defects of the silencer in the prior art are as follows:

the length and expansion ratio of the silencer can only be changed in a limited way due to the limitation of the production process and the use space of the silencer, the sectional area of the silencer at the reducing part is limited by the process, the minimum value exists, and when the silencing quantity is insufficient in the use process, the diameter of the expansion cavity of the silencer can only be further enlarged, so that the cost is increased.

Secondly, after the structure of the existing silencer is determined, the corresponding transmission loss curve is also completely determined, so that different silencer structures need to be correspondingly used according to different transmission sounds, and the product specification is multiple and the universality is poor.

When the silencing quantity of the silencer is insufficient, transmitted sound is transmitted into a room, and the cost is increased due to the fact that the silencer needs to be additionally arranged; when the volume of the noise is excessive, the cost is wasted.

The silencer 100 mentioned in the present disclosure belongs to the field of vibration reduction and noise reduction of an air conditioner indoor unit, and is suitable for a household air conditioner to eliminate a transmission sound device, a commercial air conditioner and a household appliance device with similar requirements.

The piezoelectric material has a piezoelectric effect, and when a pressure is applied to the piezoelectric material, it generates a potential difference (referred to as a positive piezoelectric effect), whereas when a voltage is applied, it generates a mechanical stress (referred to as a reverse piezoelectric effect).

In the present disclosure, the inverse piezoelectric effect of the piezoelectric material is mainly utilized, that is, the piezoelectric material laid inside the silencer is electrified to generate mechanical stress in a specific direction, that is, deformation, at a specific position, so as to achieve the purpose of adjusting the length and expansion ratio of the expansion cavity inside the silencer.

To overcome the problems in the related art, the present disclosure provides a muffler. FIG. 1 is a schematic view of a muffler shown in accordance with an exemplary embodiment. FIG. 2 is another schematic view of a muffler shown in accordance with an exemplary embodiment. FIG. 3 is a schematic illustration of the deformation of the inner bladder at various locations in the muffler, according to an exemplary embodiment. FIG. 5 is another schematic illustration of the deformation of the inner bladder in a different position in the muffler, according to an exemplary embodiment.

As shown in fig. 1, 2, 3 and 5, according to a first aspect of an embodiment of the present disclosure, there is provided a silencer 100, where the silencer 100 includes a housing 10, a liner 20 and a power supply 30.

A first cavity 11 is arranged in the shell 10, the inner container 20 is made of piezoelectric materials, the inner container 20 is arranged in the first cavity 11, and the power supply 30 is electrically connected with the inner container 20.

The piezoelectric material is electrified by utilizing the inverse piezoelectric effect of the piezoelectric material, so that the purpose of controlling the piezoelectric material to deform in a specific direction of a specific area in the silencer 100 is achieved, the continuous adjustment of the silencing quantity of the silencer 100 and the increase of the silencing quantity in a certain frequency range are realized under the condition of not changing the structural form of the silencer 100, and the limitation that the traditional silencer can only eliminate the sound in a specific frequency range is broken.

As shown in fig. 3, a, b and c are respectively the necking effects generated by different current-carrying points, and d is the larger necking deformation generated by further increasing the voltage at two ends of the piezoelectric material on the basis of c.

Taking the example of controlling a single piezoelectric material, when the power point changes, the changing position of the piezoelectric material changes accordingly as shown in the diagrams numbered a, b and c in fig. 3, further changing the sound-damping performance of the silencer 100.

The minimum outer diameter of the constricted region in the middle section of the muffler 100 of the number c is limited by the tooling process, and the minimum limit can only be 10mm, so that the maximum sound-deadening amount of the entire muffler 100 is substantially determined when the outer diameter of the muffler 100 is fixed. However, when the piezoelectric material is used, the electrified voltage is increased for the electrified point of the necking area, the piezoelectric material is further deformed, the process limit of the necking is broken without being limited by the process, a larger expansion ratio is obtained, and therefore the noise elimination quantity is improved.

It can be seen from the simulation data fig. 4 that when the voltage is constant, the adjustment of the position of the necking can be realized by adjusting the position of the electrified point, and the optimal proportion of the length of the expansion cavity can be found on the existing silencer structure. The voltage at two ends of the piezoelectric material at a certain electrifying point is adjusted to be continuously increased, so that the piezoelectric material is deformed more and more, the diameter of the necking is further reduced, the process limitation of the existing traditional silencer design can be broken through, and the silencing performance of the silencer is further improved.

As shown in fig. 5, taking the control of the numbers e and f of the plurality of piezoelectric materials as an example, when different energization points are controlled simultaneously, the purpose of generating different necking mouths can be achieved, so as to generate silencers with completely different silencing performances.

As can be seen from the simulation data fig. 6, when the voltage is constant, the adjustment of the number of the necking parts can be realized through a plurality of positions of the current-carrying points, so that the process limitation of the conventional silencer design can be broken, and the silencing performance of the silencer can be further improved.

In summary, the technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: by laying the inner container 20 on the inner wall of the silencer 100, and the material of the inner container 20 is a piezoelectric material, the inverse piezoelectric effect of the piezoelectric material is utilized, that is, the inner container 20 laid inside the silencer 100 is electrified, so that the inner container 20 deforms towards the central position of the silencer 100, the purpose of adjusting the length and the expansion ratio of an expansion cavity inside the silencer 100 can be achieved, the continuous adjustment of the noise elimination amount of the silencer 100 is realized, the noise elimination amount is increased under the condition that the structural shape of the silencer 100 is not changed, and the noise elimination performance of the silencer 100 is improved.

In some embodiments, as shown in fig. 1, the dimension of the liner 20 corresponds to the dimension of the first chamber 11 in the length direction of the housing 10.

Specifically, as shown in fig. 1, the size of the inner container 20 coincides with the size of the first chamber 11 in the longitudinal direction of the housing 10 (e.g., the axial direction of the housing 10 shown in fig. 1).

Therefore, in the present disclosure, the inner liner 20 is completely laid on the inner wall of the casing 10 along the length direction of the casing 10, which is beneficial to continuously generating deformation of the inner liner 20 and better continuously adjusting the muffler 100.

In some embodiments, as shown in fig. 2, the inner container 20 is plural, and the plural inner containers 20 are disposed in the first chamber 11 along the length direction of the casing 10.

Specifically, as shown in fig. 2, a plurality of inner containers 20 may be disposed in the first chamber 11 of the casing 10, and the plurality of inner containers 20 may be disposed at intervals in the first chamber 11. Alternatively, a plurality of inner containers 20 may be continuously provided in the first chamber 11.

In the present disclosure, the plurality of inner containers 20 are independent of each other, and the plurality of inner containers 20 are individually electrically connected to the power supply 30. Accordingly, the voltage difference between the plurality of inner containers 20 may be the same or different, that is, the degree of deformation of the plurality of inner containers 20 may be the same or different.

In summary, the plurality of inner containers 20 may be disposed in the housing 10 of the silencer 100 of the present disclosure, and the present disclosure may energize the plurality of inner containers 20 through the power supply 30, so as to achieve continuous adjustment of the silencing quantity and increase of the silencing quantity within a certain frequency range, so that the silencer 100 of the present disclosure may adapt to different requirements of silencing performance.

In some embodiments, as shown in fig. 2, the power supplier 30 is provided in plurality, and the plurality of power suppliers 30 are provided in one-to-one correspondence with the plurality of internal containers 20.

Specifically, as shown in fig. 2, the silencer 100 in the present disclosure includes a plurality of power supplies 30, and the plurality of power supplies 30 are provided in one-to-one correspondence with the plurality of inner containers 20. Therefore, the interference generated in the power supply process among the inner containers 20 and the influence on the deformation of the inner containers 20 are effectively avoided.

In some embodiments, as shown in fig. 1-2, the housing 10 has a circular tube shape, the first chamber 11 has a cylindrical shape, and the inner container 20 has a circular ring shape.

It will be appreciated that the housing 10 is designed as a circular tube, whereby the first chamber 11 in the housing 10 is cylindrical, and the inner container 20 can be designed as a circular arc since the inner container 20 is laid on the inner wall of the housing 10.

The deformation of the inner container 20 can be generated by electrifying the inner container 20, and the deformation of the inner container 20 can be more uniform by designing the inner container 20 to be a circular ring shape in the present disclosure.

Further, in the present disclosure, the inner container 20 is designed to be circular, so that the inner hole of the inner container 20 can be reduced in equal proportion, which is beneficial for technicians to better control the deformation degree of the inner container 20, and further control the muffling performance of the muffler 100.

In other embodiments of the present disclosure, the housing 10 may be configured in a square tube shape, and the first chamber 11 may be configured in a cylindrical shape or a rectangular parallelepiped shape.

Further, since the inner container 20 is laid on the inner wall surface of the casing 10, the outer peripheral surface of the inner container 20 conforms to the shape of the inner wall surface of the casing 10. Meanwhile, the inner circumferential surface of the inner container 20 in the present disclosure may be provided in a cylindrical shape, and may also be provided in a rectangular parallelepiped shape.

In the present disclosure, the shapes and sizes of the housing 10 and the liner 20 may be designed according to actual production conditions.

In some embodiments, as shown in fig. 1-2, the power supply 30 is provided with a first power supply line 31 and a second power supply line 32, and the first power supply line 31 and the second power supply line 32 are adjustably provided on the liner 20.

It is understood that the first power supply line 31 and the second power supply line 32 may be disposed at different positions on the inner container 20, and the different positions of the inner container 20 may be deformed according to the connection position between the power supplier 30 and the inner container 20.

In summary, in actual production, a technician can design the silencer 100 at different power-on positions according to different application environments.

In some embodiments, as shown in fig. 1-2, the first supply line 31 and the second supply line 32 are symmetrically disposed on the circumferential surface of the inner liner 20 in the radial direction of the inner liner 20.

In the present disclosure, the housing 10 has a circular tube shape, the first cavity 11 has a cylindrical shape, and the inner container 20 has a circular ring shape. The first and second power supply lines 31 and 32 are symmetrically disposed on the circumferential surface of the inner container 20 in the radial direction of the inner container 20.

It should be noted that the first power supply line 31 and the second power supply line 32 are symmetrically disposed, so that the deformation process of the inner container 20 is more stable and uniform.

In some embodiments, as shown in fig. 2, the first and second power supply lines 31 and 32 are symmetrically disposed on the end surface of the inner liner 20 in the axial direction of the inner liner 20.

In the present disclosure, the housing 10 has a circular tube shape, the first cavity 11 has a cylindrical shape, and the inner container 20 has a circular ring shape. The first power supply line 31 and the second power supply line 32 are symmetrically provided on the end surface of the inner container 20 in the axial direction of the inner container 20.

It should be noted that the first power supply line 31 and the second power supply line 32 are symmetrically disposed, so that the deformation process of the inner container 20 is more stable and uniform.

In some embodiments, the housing 10 is made of a piezoelectric material, and the power supply 30 is electrically connected to the housing 10.

It can be understood that the housing 10 and the inner container 20 are made of the same material and are made of piezoelectric material, and the power supply 30 is electrically connected to the housing 10. This allows the case 10 to be deformed by supplying power to the case 10 by the power supply 30, which is advantageous in improving the deforming effect of the muffler 100.

In other embodiments of the present disclosure, the housing 10 is made of steel, thereby improving the mechanical strength of the silencer 100 and improving the stability of the silencer 100 during installation. At the same time, it is convenient for the technician to fix the muffler 100.

In some embodiments, the housing 10 and the liner 20 are integrally formed.

It can be understood that the casing 10 and the inner container 20 are made of the same material, and are made of piezoelectric material, and the casing 10 and the inner container 20 are integrally formed. This is advantageous in improving the strength and stability of the connection between the housing 10 and the inner container 20.

In other embodiments of the present disclosure, the casing 10 and the inner container 20 are integrally formed, i.e., the casing 10 and the inner container 20 are combined together.

According to a second aspect of an embodiment of the present disclosure, there is provided a method of manufacturing a muffler 100, the method including:

a casing 10 of a silencer 100 is prepared, an inner container 20 is laid on the inner wall of the casing 10, the inner container 20 is made of a piezoelectric material, and a power supply 30 is electrically connected to the inner container 20.

According to a third aspect of embodiments of the present disclosure, there is provided an air conditioner including the silencer according to any one of the embodiments of the present disclosure.

According to a fourth aspect of embodiments of the present disclosure, there is provided an automobile comprising a muffler according to any one of the embodiments of the present disclosure.

The main points of the technical scheme in the disclosure are embodied in the following two aspects:

1. under the condition that the external structure of the silencer 100 is unchanged, the inverse piezoelectric effect of the piezoelectric material is utilized to realize continuous change of the effective silencing area of the silencer 100, so that the aim of continuously adjusting the silencing amount of the silencer 100 is fulfilled.

2. Since the mechanical stress of the piezoelectric material changes with the change of the voltage, the process limitation of the traditional silencer structure can be broken, and the increase of the silencing quantity of a certain frequency section of the silencer 100 is realized.

In summary, in the present disclosure, by controlling the voltage of the piezoelectric material, the muffler 100 can be controlled from the non-piezoelectric material (i.e., the original structure) to different deformation degrees of multiple regions inside the muffler 100, that is, the muffler can continuously change and be regulated in muffling performance, that is, one muffler structure can satisfy the control of multiple muffling frequency segments, thereby achieving the versatility of the muffler structure.

The silencer 100 in the embodiment of the disclosure can effectively solve the problem that the silencing amount of the silencer 100 in the prior art is limited by the process and the placement position in use, thereby realizing the continuous adjustment of the silencing amount of the silencer 100, increasing the silencing amount without changing the structural shape of the silencer 100, and improving the silencing performance of the silencer 100.

It should be noted that in daily life, the demand of people for air conditioners and other various refrigeration devices is increasing. Among them, noise of the air conditioner is an important evaluation criterion for evaluating performance, and vibration of the compressor and its piping is a main cause of vibration noise generated from the outdoor unit. Because the operation frequency of the compressor of the inverter air conditioner is changed, in the noise reduction design, only the frequency value with the maximum noise can be selected for control, so that the noise control of the compressor at other operation frequencies cannot be optimal.

The silencer 100 of the embodiment of the present disclosure is configured to use a piezoelectric material to form the inner container 20 or the casing 10 of the silencer 100, according to the characteristic of wide operating frequency of the compressor of the air conditioner. By changing the current connected to the silencer 100 at different operating frequencies, the size of the casing 10 or the liner 20 of the silencer 100 is changed according to the inverse piezoelectric effect of the piezoelectric material, so that the sound absorption performance curve of the silencer 100 is changed. The sound absorption peak frequency of the silencer 100 is shifted to the operating frequency, so that the noise reduction requirement under each operating frequency can be well met, the sound absorption peak frequency of the silencer 100 is the optimal value of the full-band noise in the selectable range, and the silencer 100 has good vibration and noise reduction performance.

In other words, compared with the conventional noise reduction method using a fixed-size silencer, the noise reduction method can utilize the inverse piezoelectric effect of the piezoelectric material to cause the size of the silencer 100 to change, so that the sound absorption frequency peak of the silencer 100 is changed, and the noise reduction can be performed on the full-frequency noise.

In some embodiments of the present disclosure, by using the inverse piezoelectric effect of the piezoelectric material, the deformation degree of the muffler 100 is changed by adjusting the magnitude of the current that is connected to the housing 10 or the inner container 20 of the muffler 100, so as to change the inner diameter of the middle expansion section of the muffler 100, and further change the expansion ratio of the muffler 100, so as to change the sound absorption peak frequency of the sound absorption curve of the muffler 100, so that the sound absorption peak frequency is adapted to the operating frequency of the current compressor, so that the corresponding current is connected to the housing 10 or the inner container 20 of the muffler 100 at each operating frequency point, and the sound absorption effect of the muffler 100 is optimal.

In the present disclosure, as the applied current increases, the mechanical deformation degree of the housing 10 or the liner 20 of the muffler 100 is more severe, and the inner diameter of the middle expansion section of the housing 10 or the liner 20 of the muffler 100 decreases, so that the expansion ratio of the muffler 100 decreases, thereby realizing that the sound absorption peak frequency of the sound absorption curve of the muffler 100 is changed by changing the applied current of the muffler 100, and optimizing the sound absorption efficiency of the muffler 100.

In the present disclosure, it is possible to design the housing 10 of the whole muffler 100 to be made of a piezoelectric material as needed, and it is also possible to design a part of the housing 10 of the muffler 100 to be made of a piezoelectric material, as long as it is possible to realize a change in the size of the muffler 100 by using the inverse piezoelectric effect of the piezoelectric material, thereby causing a change in the sound absorption peak frequency of the muffler 100, without departing from the design concept of the present invention.

In some embodiments of the present disclosure, the present disclosure also discloses an air conditioner, which is provided in the present disclosure because it includes the silencer 100 according to any one of the embodiments of the present disclosure. The air conditioner in the present disclosure thus has the advantageous effects of the silencer 100 according to any one of the embodiments of the present disclosure.

Specifically, according to the characteristic of wide operating frequency of the compressor of the air conditioner, the shell 10 or the inner container 20 of the silencer 100 is made of piezoelectric material, by changing the magnitude of the current that is coupled into the muffler 100 at different operating frequencies, i.e., selecting a current that matches the current compressor operating frequency based on the current compressor operating frequency to be coupled into the muffler 100 housing, the size of the housing of the muffler 100 is changed according to the inverse piezoelectric effect of the piezoelectric material (specifically, the expansion ratio of the muffler 100 can be changed by changing the size of the housing of the muffler 100), thereby changing the sound absorption performance curve of the muffler 100, shifting the sound absorption peak frequency of the muffler 100 to the operating frequency, therefore, the noise reduction requirement under each operating frequency can be well met, the sound absorption peak frequency of the silencer 100 is the optimal value of the full-frequency-band noise in the selectable range, and the silencer 100 has good vibration reduction and noise reduction performance.

In some embodiments of the present disclosure, the air conditioner further includes a controller including a detection unit, a data storage unit, and a control unit.

The detection unit is used for detecting the running frequency of the compressor in real time, the data storage unit is used for establishing a one-to-one correspondence relationship between the running frequency of the compressor and the access current of the shell 10 or the liner 20 of the silencer 100, and the control unit is used for acquiring the current running frequency of the compressor from the detection unit, acquiring the access current of the silencer 100 corresponding to the current running frequency of the compressor from the data storage unit, and controlling the power supply circuit to provide the current with the same magnitude as the acquired access current for the silencer 100.

In some embodiments of the present disclosure, a one-to-one correspondence relationship between the operating frequency of the compressor and the access current of the muffler 100 may be determined through a theoretical calculation or a test verification, and the one-to-one correspondence relationship is stored in a data storage unit of the controller, so as to ensure that a corresponding current is accessed to the muffler 100 at each operating frequency point of the compressor, so that the muffling effect of the muffler 100 is optimal.

In some embodiments of the present disclosure, the data storage unit is configured to establish a one-to-one correspondence relationship between an access current of the muffler 100 and a sound absorption peak frequency of the muffler 100, and when the control unit controls the power supply circuit to provide a current with a magnitude equal to that of the obtained access current to the muffler 100, the sound absorption peak frequency of the muffler 100 matches with an operating frequency of a current compressor.

The deformation of the silencer 100 when the silencer 100 is connected with currents of different magnitudes can be determined through theoretical calculation or experimental verification, thereby determining the change in the expansion ratio of the muffler 100 caused when the muffler 100 is connected to different levels of current, thereby determining the sound absorption peak frequency of the muffler 100 at different expansion ratios of the muffler 100, thereby determining the one-to-one correspondence relationship between the magnitude of the current switched in the silencer 100 and the sound absorption peak frequency of the silencer 100, furthermore, by controlling the magnitude of the current of the silencer 100, the silencer 100 has a sound absorption peak frequency matched with the current at each operating frequency, therefore, the noise elimination effect of the silencer 100 is optimal under each operating frequency, that is, the sound absorption peak frequency of the silencer 100 is the optimal value of the full-frequency-band noise in the selectable range, so that the silencer 100 has good vibration and noise reduction performance.

In some embodiments of the present disclosure, a wire is connected to the muffler 100, and the muffler 100 is connected to a power supply circuit through the wire, so that applying an electric field to the muffler 100 through the power supply circuit causes mechanical deformation of the muffler 100, thereby causing a size change of the muffler 100, and further changing a sound absorption frequency peak of the muffler 100; in one embodiment, the wires are welded to the silencer 100, which is simple to manufacture, secure, and reliable.

Further, the muffler 100 in the embodiment of the present disclosure may also be applied to the automotive field.

It is understood that the noise of the engine of the automobile is a random noise whose noise frequency is frequently changed and whose frequency range is not determined, and therefore, the noise reduction performance of the muffler 100 having a fixed structure, shape and size does not achieve the intended target when the muffler is used to reduce the noise of the engine in the prior art.

In the present disclosure, a layer of inner container 20 may be disposed in the casing 10 of the silencer 100, and the inner container 20 is made of a piezoelectric material. Specifically, the piezoelectric material can be a piezoelectric ceramic material PZT-5, and the thickness of the piezoelectric material layer can be freely set according to actual conditions. The piezoelectric material layer can also be a piezoelectric composite material of PZT-5 and other material components.

Further, a first layer of polyvinylidene fluoride film is laid on the inner wall of the inner container 20, a rubber layer is laid on the inner surface of the first layer of polyvinylidene fluoride film, a second layer of polyvinylidene fluoride film is laid on the inner surface of the rubber layer, a porous material layer is laid on the inner side face of the second layer of polyvinylidene fluoride film, the first layer of polyvinylidene fluoride film and the second layer of polyvinylidene fluoride film are connected with a controller through wires, the controller is connected with a frequency converter, the voltage input end of the frequency converter is connected with a storage battery of an automobile, and the voltage output end of the frequency converter is connected with the inner surface and the outer surface of the piezoelectric material layer through wires.

It is understood that two layers of polyvinylidene fluoride films are provided in the silencer 100 for an automobile in the present disclosure to detect incident sound pressure and reflected sound pressure of the piezoelectric material layer, and the signals may be input to the controller. The controller calculates the voltage to be loaded on the piezoelectric composite material, the storage battery of the engine provides the voltage to the frequency converter, the frequency converter carries out frequency conversion and voltage transformation, the voltage after frequency conversion is loaded on the piezoelectric composite material layer laid on the inner wall of the silencer 100, the piezoelectric composite material can vibrate at the moment due to the fact that the piezoelectric composite material has good force-electricity coupling performance and piezoelectric effect, the acoustic impedance of the surface of the piezoelectric composite material is matched with the acoustic impedance of air inside the silencer 100, and the energy of noise inside the silencer 100 is completely consumed by the piezoelectric composite material, so that the purpose of active noise elimination is achieved.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used herein to denote orientations and positional relationships, based on the orientation or positional relationship shown in the drawings, and are used merely to facilitate description of the embodiments and to simplify the description, but do not indicate or imply that the referenced devices or elements must be constructed and operated in a specific orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the scope of the appended claims.

Claims (13)

1. A muffler, comprising:

the device comprises a shell, a first cavity and a second cavity, wherein the first cavity is arranged in the shell;

the inner container is made of a piezoelectric material and is arranged in the first cavity; and

and the power supply is electrically connected with the inner container.

2. The muffler of claim 1,

in the length direction of the shell, the size of the inner container is consistent with that of the first cavity.

3. The muffler of claim 1,

the inner containers are multiple, and the inner containers are arranged in the first cavity along the length direction of the shell.

4. The muffler of claim 3,

the power supply device is provided with a plurality of power supply devices, and the plurality of power supply devices and the plurality of inner containers are arranged in a one-to-one correspondence mode.

5. The muffler of claim 1,

the shell is in a circular tube shape, the first cavity is in a cylindrical shape, and the inner container is in a circular ring shape.

6. The muffler of claim 5,

the power supply is provided with a first power supply line and a second power supply line, and the first power supply line and the second power supply line are arranged on the inner container.

7. The muffler of claim 6,

the first power supply line and the second power supply line are symmetrically arranged on the circumferential surface of the inner container in the radial direction of the inner container.

8. The muffler of claim 6,

the first power supply line and the second power supply line are symmetrically provided on an end surface of the inner container in an axial direction of the inner container.

9. The muffler of claim 1,

the shell is made of piezoelectric materials, and the power supply is electrically connected with the shell.

10. The muffler of claim 9,

the shell and the inner container are integrally formed.

11. A method of making a muffler, comprising:

preparing a shell of the silencer;

laying an inner container on the inner wall of the shell, wherein the inner container is made of a piezoelectric material;

and electrically connecting a power supply with the inner container.

12. An air conditioner characterized by comprising a muffler as recited in any one of claims 1 to 10.

13. An automobile, characterized in that it comprises a silencer according to any one of claims 1-10.

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