CN216716592U - Sound lining, gas water heater - Google Patents

Abstract

The application relates to the technical field of gas water heaters and discloses an acoustic liner. The acoustic liner comprises a pore plate with a preset thickness, the pore plate is provided with through holes penetrating through two side surfaces of the pore plate, and the aperture of each through hole is smaller than 1 mm; the cavity is of a hollow structure with one side opened; wherein, the orifice plate is arranged at the opening of the cavity. The acoustic liner can reduce the noise of combustion generated by the gas in the gas water heater during the combustion process. The application also discloses a gas water heater.

Description

Sound lining, gas water heater

Technical Field

The application relates to the technical field of gas water heaters, for example to an acoustic liner and a gas water heater comprising the acoustic liner.

Background

The gas water heater takes gas as fuel, and the purpose of preparing hot water is achieved by transferring high-temperature heat generated by gas combustion to cold water flowing through a heat exchanger. The household gas water heater has the advantages of being ready to use, small in occupied area, free of water quantity control and the like, and is popular with consumers.

At present, in the process of cold start or operation of a household gas water heater, severe fluctuation of flame can occur, certain noise is generated, and the use experience of a user is influenced. The general gas water heater adopts the sound insulation shell to reduce noise of all noises such as the noise of a fan, the noise of gas combustion and the like.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

adopt the shell that gives sound insulation to fall the in-process of making an uproar to all noises of gas heater, the shell that gives sound insulation is not showing the noise reduction effect of burning sound, and the user still can experience the noise of gas combustion in the water heater, and product experience feels relatively poor.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The disclosed embodiment provides an acoustic liner and a gas water heater, so as to reduce noise generated by combustion noise generated in a combustion process of gas in the gas water heater.

In some embodiments, the acoustic liner comprises an orifice plate and a cavity, the orifice plate having a predetermined thickness, the orifice plate being provided with through holes penetrating both sides of the orifice plate, the through holes having an aperture of less than 1 mm; the cavity is of a hollow structure with one side opened; wherein, the orifice plate sets up in the opening part of cavity.

Optionally, the through hole is a plurality of through holes, and the plurality of through holes are uniformly arranged on the orifice plate.

Optionally, the hole pitch between two adjacent through holes ranges from 1mm to 10 mm.

Optionally, the perforated plate has a perforation rate of less than 5%.

Optionally, the predetermined thickness of the orifice plate ranges from 0.7mm to 2.5 mm.

In some embodiments, the gas water heater includes the acoustic liner described above.

Optionally, the gas water heater further comprises a combustion chamber, the combustion chamber has a closed combustion chamber and a wall body enclosing the combustion chamber, a flame point for gas combustion is arranged in the combustion chamber, and the acoustic liner is arranged on the outer side surface of the wall body.

Optionally, the orifice plate is disposed opposite the flame point within the combustion chamber.

Optionally, the orifice plate is welded to the outer side of the wall.

Optionally, the acoustic liner comprises a first acoustic liner disposed on the first outer side of the wall and a second acoustic liner disposed on the second outer side of the wall.

The sound liner and the gas water heater provided by the embodiment of the disclosure can realize the following technical effects:

in the embodiment of the application, the acoustic liner comprises a pore plate and a cavity, the pore plate and the cavity are of preset thicknesses, through holes are formed in two side faces of the through pore plate, the aperture of each through hole is smaller than or equal to 1mm, one side of the cavity of the hollow structure is opened, and the pore plate is arranged at the opening of the cavity. Namely, the sound liner is a hollow cavity provided with a through hole smaller than or equal to 1mm, the combustion noise of the gas water heater is transmitted to the cavity from the through hole with a smaller aperture, air is arranged in the cavity, the gas in the hole neck of the through hole moves up and down like a piston under the action of sound waves, and partial air molecules rub with the hole wall, namely, the sound liner provided with the through hole has sound resistance, so that sound energy is converted into heat energy to be consumed. The frequency of gas heater's combustion noise is lower, and the eigen frequency of the sound lining of this application also can be lower, and when the eigen frequency of sound lining and external acoustic wave frequency unanimous, can take place to resonate, and the speed of the air vibration in the through-hole neck reaches the biggest, and more acoustic energy is converted into heat energy and is consumed. Therefore, the noise reduction can be performed on the combustion noise of the gas water heater with lower frequency through the sound liner, and the use experience of a user is improved.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is an overall schematic view of an acoustic liner provided by embodiments of the present disclosure;

FIG. 2 is a schematic diagram of an acoustically lined orifice plate assembly according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another acoustic liner configuration provided by embodiments of the present disclosure;

fig. 4 is a partial schematic structural diagram of a gas water heater provided by the embodiment of the disclosure.

Reference numerals:

10: an acoustic liner; 11: an orifice plate; 111: a through hole; 12: a cavity; 20: a combustion chamber; 21: the wall of the combustion chamber.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more, unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

At present, the gas water heater is more and more favored by consumers due to small floor area, no water quantity control, energy conservation and environmental protection. However, in the process of cold start or operation of the gas water heater, certain combustion noise is generated by gas combustion. In general, noise reduction means such as a soundproof case and soundproof cotton filling have an insignificant noise reduction effect on combustion noise. The embodiment of the application uses the acoustic liner 10 to reduce the noise of the combustion noise below 200Hz generated by the gas water heater, and the acoustic liner is essentially a resonance silencer and adopts the principle of resonance silencing to reduce the noise of the low-frequency combustion noise generated by the gas water heater.

The present application provides an acoustic liner 10 having an aperture of the orifice plate 11 of the acoustic liner 10 of less than or equal to 1mm, as shown in figures 1 and 2.

In some embodiments, the acoustic liner 10 includes a hole plate 11 and a cavity 12, the hole plate 11 has a predetermined thickness, the hole plate 11 is provided with through holes 111 penetrating both sides of the hole plate 11, and the hole diameter of the through holes 111 is less than 1 mm; and a cavity 12 having a hollow structure with one side opened; wherein, the orifice plate 11 is arranged at the opening of the cavity 12.

As shown in fig. 1, the acoustic liner 10 includes a hole plate 11 and a cavity 12, the hole plate 11 is provided with a through hole 111 penetrating through two side surfaces of the hole plate 11 and having a hole diameter smaller than or equal to 1mm, one side of the cavity 12 of a hollow structure is open, and the hole plate 11 is disposed at the opening of the cavity 12. That is, the acoustic liner 10 is a hollow cavity 12 provided with a through hole 111 smaller than or equal to 1mm, combustion noise of the gas water heater is transmitted to the cavity 12 from the through hole 111 with a smaller aperture, air is provided in the cavity 12, gas in the hole neck of the through hole 111 moves up and down like a piston under the action of sound waves, and partial air molecules rub against the hole wall, that is, the acoustic liner 10 provided with the through hole 111 has acoustic resistance, so that sound energy is converted into heat energy to be consumed. When the aperture of the orifice plate 11 of the acoustic liner 10 is smaller, the frictional resistance between the air in the neck of the through hole 111 and the wall of the hole is larger, i.e. the acoustic liner 10 has a larger acoustic resistance, so that more acoustic energy can be converted into heat energy to be consumed. The combustion noise frequency of gas heater is lower, and the characteristic frequency of the sound lining 10 of this application also can be lower, and when the characteristic frequency of sound lining 10 was unanimous with external acoustic wave frequency, the resonance can take place, and the speed of the air vibration in the through-hole 111 bore neck reaches the biggest, and more acoustic energy is converted into heat energy and is consumed. Therefore, the noise reduction of the combustion noise of the gas water heater with lower frequency can be realized through the acoustic liner 10, and the use experience of a user is improved.

Optionally, the orifice plate 11 and the cavity 12 of the acoustic liner 10 are made of hard metal material. The orifice plate 11 of the acoustic liner 10 is positioned at the entrance of the hollow cavity 12, the orifice plate 11 can be welded to the side wall of the cavity 12, and similarly, the side walls of the cavity 12 are welded to each other, so that the connecting parts of the acoustic liner 10 can be well connected, the condition of poor sealing between the orifice plate 11 and the cavity 12 or between the side walls of the cavity 12 is avoided, and the sound absorption effect of the acoustic liner 10 is affected.

Alternatively, the through hole 111 is plural, and the plural through holes 111 are uniformly provided in the orifice plate 11.

As shown in fig. 2, the orifice plate 11 of the acoustic liner 10 is provided with a plurality of through holes 111 penetrating both side surfaces of the orifice plate 11, wherein the hole diameter of the through holes 111 is less than or equal to 1 mm. Alternatively, the plurality of through holes 111 are uniformly arranged with the orifice plate 11; optionally, the through holes 111 may also be arranged on one side of the orifice plate 11, or in a shape like a Chinese character 'ren' or 'mi'.

In general, the number of the through holes 111 of the acoustic liner 10 is related to the perforation rate of the orifice plate 11 of the acoustic liner 10, and the perforation rate of the orifice plate 11 of the acoustic liner 10 is defined as P, the perforation rate of the orifice plate 11 is equal to the area of the through holes 111 divided by the area of the orifice plate 11, the area of the orifice plate 11 is constant, and the greater the number of the through holes 111 provided in the orifice plate 11 of the acoustic liner 10, the greater the perforation rate of the orifice plate 11. In general, the perforation rate of the acoustic liner 10 has a predetermined range, and the number and the diameter of the through holes 111 need to be set in accordance with the perforation rate range.

In the embodiment of the application, the through holes 111 are uniformly arranged on the pore plate 11, and under the condition that the area of the pore plate 11 is certain, more through holes 111 are arranged on the pore plate 11, so that under the condition that other variables influencing the characteristic frequency of the acoustic liner 10 are unchanged, the acoustic liner 10 has larger acoustic resistance, more acoustic energy can be converted into heat energy to be consumed, and the sound absorption effect of the acoustic liner 10 is improved.

Optionally, the hole pitch between two adjacent through holes 111 ranges from 1mm to 10 mm.

As described above, the perforation rate is related to the perforation area of the through holes 111 and the area of the orifice plate 11, and the perforation rate of the orifice plate 11 generally has a set range, and thus the hole pitch between two adjacent through holes 111 on the orifice plate 11 also needs to be set within the range of the perforation rate. For example, the hole pitch of the adjacent through holes 111 is 1mm, 2mm, or 4 mm.

Optionally, the perforated plate 11 has a perforation rate of less than 5%.

Generally, the perforation rate of the orifice plate 11 of the acoustic liner 10 needs to be controlled within 5%, so that the acoustic liner 10 has a relatively good sound-deadening effect. It is understood that the perforation rate is equal to the perforated area of the through-holes 111 divided by the area of the orifice plate 11, and thus the number of the through-holes 111 and the hole diameter of the through-holes 111 need to be set within the range of the perforation rate described above. The greater the perforation rate of the perforated plate 11, the better the sound absorption of the acoustic liner 10, within a certain range, without changing other variables that affect the sound absorption of the acoustic liner 10.

Optionally, the predetermined thickness of the orifice plate 11 ranges from 0.7mm to 2.5 mm.

As shown in fig. 2, the acoustic liner 10 includes a hole plate 11 and a cavity 12, the hole plate 11 is provided with a through hole 111, the through hole 111 penetrates through two side surfaces of the hole plate 11, the aperture range of the through hole 111 is smaller than or equal to 1mm, and the hole plate 11 further has a certain thickness, and the preset thickness range is 0.7mm to 2.5 mm. The thickness of the aperture plate 11 defining the acoustic liner 10 is denoted by L as shown in fig. 1. The characteristic frequency of the acoustic liner 10 is related to the thickness of the orifice plate 11, and under the condition that other variables influencing the sound absorption performance of the acoustic liner 10 are unchanged, the larger the thickness of the orifice plate 11 is, the smaller the sound absorption performance of the acoustic liner 10 is in a certain range.

When the hole diameter of the through hole 111 of the orifice plate 11 of the acoustic liner 10 is less than or equal to 1mm, the resonance noise elimination principle of the acoustic liner 10 of the present embodiment is as follows:

the whole acoustic liner 10 is compared with a resonance system formed by a spring and an object with certain mass, the air column in the hole neck of the through hole 111 is compared with the load mass in the vibration system, the cavity 12 with air is compared with a spring, and the cavity 12 with air can resist the sound wave pressure transmitted into the cavity 12 from the outside of the cavity 12. When the sound wave outside the cavity 12 is transmitted to the cavity 12 through the through hole 111, the air column in the neck of the through hole 111 reciprocates like a piston under the action of the sound wave, and friction exists between part of air molecules in the through hole 111 and the hole wall, that is, the sound liner 10 provided with the through hole 111 has sound resistance, so that the sound energy is converted into heat energy to be consumed. When the aperture of the through hole 111 is smaller than or equal to 1mm, there is a large frictional resistance between the air molecules in the through hole 111 and the wall of the hole, so that the acoustic liner 10 has a larger acoustic resistance, and more acoustic energy can be converted into heat energy to be consumed. In general, the depth of the acoustic liner 10 is smaller than the wavelength of the sound wave outside the cavity 12, and the sound wave excites the air molecules in the bore neck of the through-hole 111 to reciprocate like a piston. When the characteristic frequency of the acoustic liner 10 is consistent with the frequency of the sound wave outside the cavity 12, resonance occurs, and the air vibration speed in the hole neck of the through hole 111 reaches the maximum, that is, the acoustic resistance reaches the maximum, so that more sound energy can be consumed, and a better sound absorption effect is achieved. In the embodiment of the present application, when the aperture of the through hole 111 of the orifice plate 11 of the acoustic liner 10 is less than or equal to 1mm, the sound absorption performance of the acoustic liner 10 is related to various factors, such as the aperture of the through hole 111, the thickness of the orifice plate 11, the perforation rate of the orifice plate 11, the depth of the cavity 12, and, in addition, related parameters of the fluid entering the acoustic liner 10. Thus, the dimensions of the acoustic liner 10 need to be set in consideration of the above factors.

The application also discloses a gas water heater, which comprises the acoustic liner 10, wherein the aperture of the through hole 111 of the acoustic liner 10 is less than or equal to 1mm, as shown in fig. 4.

In some embodiments, a gas water heater includes the acoustic liner 10 described above.

Optionally, the gas water heater further comprises a combustion chamber 20, the combustion chamber 20 having a closed combustion chamber and a wall 21 enclosing the combustion chamber, the combustion chamber having a flame point for combustion of the gas therein, wherein the acoustic liner 10 is arranged on an outer side of the wall 21.

In the embodiment of the present application, the gas water heater comprises a combustion chamber 20 and an acoustic liner 10, wherein the combustion chamber 20 has a combustion chamber and a wall body 21 enclosing the combustion chamber, and the wall body 21 of the combustion chamber encloses the combustion chamber as a closed space for gas combustion. When the gas water heater is started or operated by a cold machine, gas in the combustion cavity is ignited and combusted, and thus, the combustion cavity is internally provided with a flame point for combusting the gas. The acoustic liner 10 is disposed on either side of the exterior of the wall 21 of the combustion chamber. Therefore, the distance between the noise of gas combustion emitted from the combustion chamber and the acoustic liner 10 is short, and the noise elimination effect of the acoustic liner 10 on the gas water heater is improved.

Optionally, the orifice plate 11 is positioned opposite the flame point within the combustion chamber.

As shown in fig. 4, the acoustic liner 10 is provided on the outer side surface of the combustion chamber wall body 21, and the orifice plate 11 of the acoustic liner 10 is connected to the outer side surface of the combustion chamber wall body 21. The combustion noise generated by the combustion chamber of the gas water heater mainly comes from the flame point of the combustion of the gas in the combustion chamber, the orifice plate 11 of the acoustic liner 10 faces the wall body 21 at the flame point in the combustion chamber, i.e. the orifice plate 11 is located on the outer side surface of the wall body 21 of the combustion chamber and faces the flame point inside the combustion chamber, so that the combustion noise generated by the gas directly enters the orifice plate 11 of the acoustic liner 10 from the combustion chamber, and the noise reduction effect of the acoustic liner 10 on the gas water heater is more remarkable.

Optionally, the orifice plate 11 is welded to the outer side of the wall 21.

Optionally, the orifice plate 11 of the acoustic liner 10 is connected to the outer side of the wall 21 of the combustion chamber, and the orifice plate 11 is welded to the outer side of the wall 21, so that the acoustic liner 10 can be firmly connected to the side wall of the combustion chamber 20, and the noise reduction effect of the acoustic liner 10 is not adversely affected by the connection between the orifice plate 11 and the combustion chamber 20. Optionally, the orifice plate 11 and the cavity 12 of the acoustic liner 10 are made of hard metal materials, the orifice plate 11 of the acoustic liner 10 is located at the inlet of the cavity 12, the orifice plate 11 is welded to the side wall of the cavity 12, and similarly, the side walls of the cavity 12 are welded to each other, so that the connecting parts of the acoustic liner 10 can be well connected to each other, and the situation of poor sealing between the orifice plate 11 and the cavity 12 or between the side walls of the cavity 12 can be avoided.

Optionally, the acoustic liner 10 includes a first acoustic liner 10 and a second acoustic liner 10, the first acoustic liner 10 is disposed on the first outer side of the wall 21, and the second acoustic liner 10 is disposed on the second outer side of the wall 21.

Alternatively, the number of acoustic liners 10 may be set to 2, the first acoustic liner 10 and the second acoustic liner 10, respectively. In the exemplary embodiment of the application, 2 acoustic liners 10 are arranged on different outer sides of the wall 21 of the combustion chamber. Optionally, the first outer side and the second outer side are oppositely disposed.

Under the condition that the internal structure and the pipeline of the gas water heater allow, two sound linings 10 are arranged on the outer side surface of the wall body 21 of the combustion cavity, so that the silencing effect of the sound linings 10 on the combustion noise in the combustion cavity can be improved.

The present application also provides another acoustic liner having through holes with an aperture diameter in the range of 1mm to 20mm, as shown in fig. 3.

In other embodiments, the acoustic liner 10 includes: the structure comprises a pore plate 11 and a cavity 12, wherein the pore plate 11 has a preset thickness, the pore plate 11 is provided with through holes 111 penetrating through two side surfaces of the pore plate 11, and the cavity 12 is a hollow structure with one side opened; wherein, the orifice plate 11 is arranged at the opening of the cavity 12.

As shown in fig. 3, the acoustic liner 10 includes a hole plate 11 having a predetermined thickness and a cavity 12, the hole plate 11 is provided with a through hole 111 penetrating both side surfaces of the hole plate 11, one side of the hollow structural cavity 12 is opened, and the hole plate 11 is provided at the opening of the cavity 12. I.e., the acoustic liner 10 is a hollow cavity 12 with a through hole 111 provided at one side,

alternatively, the aperture of the through-hole 111 ranges from 1mm to 20 mm.

In the embodiment of the present application, the acoustic liner 10 includes a hole plate 11 and a cavity 12, the hole plate 11 is provided with a through hole 111, the through hole 111 penetrates through two sides of the hole plate 11, the aperture range of the through hole 111 is 1mm to 20mm, the aperture of the through hole 111 defining the acoustic liner 10 is denoted by d, the characteristic frequency of the acoustic liner 10 is related to the aperture of the through hole 111 on the hole plate 11, and under the condition that other variables affecting the characteristic frequency of the acoustic liner 10 are not changed, the larger the aperture d of the through hole 111 is, the smaller the characteristic frequency of the acoustic liner 10 is.

Optionally, the predetermined thickness of the orifice plate 11 ranges from 0.5mm to 3 mm.

As shown in fig. 3, the acoustic liner 10 includes a hole plate 11 and a cavity 12, the hole plate 11 is provided with a through hole 111, the through hole 111 penetrates through two side surfaces of the hole plate 11, the aperture range of the through hole 111 is 1mm to 20mm, the hole plate 11 further has a certain thickness, and the preset thickness range is 0.5mm to 3 mm. The thickness of the aperture plate 11 defining the acoustic liner 10 is denoted by L as shown in fig. 3. The characteristic frequency of the acoustic liner 10 is related to the thickness of the orifice plate 11, and the larger the thickness of the orifice plate 11, the smaller the characteristic frequency of the acoustic liner 10, without changing other variables affecting the characteristic frequency of the acoustic liner 10.

Alternatively, the number of the through holes 111 is plural.

As shown in fig. 3, the acoustic liner 10 includes a hole plate 11 and a cavity 12, the hole plate 11 is provided with through holes 111 penetrating both sides of the hole plate 11, wherein the aperture d of the through holes 111 ranges from 1mm to 20mm, and the preset thickness L of the hole plate 11 ranges from 0.5mm to 3 mm. Alternatively, the number of the through holes 111 may be 2; alternatively, the number of the through holes 111 may also be plural, for example, the number of the through holes 111 may be 4, 6, or 7, and so on.

In the case where the number of the through holes 111 provided in the orifice plate 11 is plural, alternatively, the plural through holes 111 may be uniformly arranged in the orifice plate 11; alternatively, the plurality of through holes 111 may also be arranged at one side of the orifice plate 11. The arrangement of the through holes 111 of the acoustic liner 10 is not particularly limited in the embodiments of the present application. The number of the through holes 111 of the acoustic liner 10 is related to the perforation rate of the orifice plate 11 of the acoustic liner 10, the perforation rate of the orifice plate 11 of the acoustic liner 10 is represented by P, the perforation rate of the orifice plate 11 is equal to the area of the through holes 111 divided by the area of the orifice plate 11, the area of the orifice plate 11 is preset to be constant, and the greater the number of the through holes 111 arranged in the orifice plate 11 of the acoustic liner 10, the greater the perforation rate of the orifice plate 11. In a usual case, the perforation rate of the orifice plate 11 is less than 5%, and it is understood that the number and the hole diameter of the through holes 111 need to be set in accordance with the above-described perforation rate range. The greater the perforation rate of the orifice plate 11, the greater the characteristic frequency of the acoustic liner 10, without changing other variables that affect the characteristic frequency of the acoustic liner 10.

Optionally, the depth of the cavity 12 is less than 50 mm.

As shown in fig. 3, the acoustic liner 10 includes a hole plate 11 and a cavity 12, the hole plate 11 is provided with through holes 111 penetrating both sides of the hole plate 11, wherein the aperture d of the through holes 111 ranges from 1mm to 20mm, the preset thickness L of the plate ranges from 0.5mm to 3mm, and the depth of the cavity 12 ranges from 0mm to 50 mm. In this application the depth of the cavity 12 is denoted by h, the length of the cavity 12 is denoted by a and the width of the cavity 12 is denoted by b, as shown in fig. 3. The greater the depth h of the cavity 12, the smaller the characteristic frequency of the acoustic liner 10, with other variables affecting the characteristic frequency of the acoustic liner 10 unchanged. The characteristic frequency of the acoustic liner 10 is not related to the length and width of the cavity 12, and when the acoustic liner 10 is installed in the gas water heater, the length and width of the cavity 12 of the acoustic liner 10 can be set according to the internal structure of the gas water heater, and the length and width of the cavity 12 are not specifically limited in the embodiment of the present application.

In the embodiment of the present application, the thickness of the orifice plate 11 of the acoustic liner 10, the number and diameter of the through holes 111, and the depth of the cavity 12 jointly determine the characteristic frequency of the acoustic liner 10, and the acoustic liner 10 of the embodiment of the present application can muffle the noise around the characteristic frequency.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. An acoustic liner, comprising:

the pore plate is provided with a through hole penetrating through two side faces of the pore plate, and the aperture of the through hole is smaller than or equal to 1 mm; and the combination of (a) and (b),

the cavity is of a hollow structure with one side opened;

wherein, the orifice plate is arranged at the opening of the cavity.

2. The acoustic liner of claim 1,

the through-hole is a plurality of, a plurality of through-holes set up uniformly in the orifice plate.

3. The acoustic liner of claim 1,

the hole spacing range between two adjacent through holes is 1mm to 10 mm.

4. The acoustic liner of claim 1,

the perforated plate has a perforation rate of less than 5%.

5. The acoustic liner of claim 3,

the preset thickness range of the orifice plate is 0.7mm to 2.5 mm.

6. A gas water heater comprising an acoustic liner as claimed in any one of claims 1 to 5.

7. The gas water heater of claim 6, further comprising:

the combustion chamber has confined combustion chamber and encloses and establishes the wall body in combustion chamber, the combustion intracavity has the flame point of gas combustion, wherein, the sound lining set up in the lateral surface of wall body.

8. The gas water heater of claim 7,

the orifice plate is disposed opposite the flame point in the combustion chamber.

9. The gas water heater of claim 7,

the orifice plate is welded to the outer side surface of the wall body.

10. The gas water heater of claim 7, wherein the acoustic liner comprises:

the first acoustic liner is arranged on the first outer side surface of the wall body; and the combination of (a) and (b),

and the second sound liner is arranged on the second outer side surface of the wall body.

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