CN220287765U - Rectifying noise-reducing shell and gas water heater - Google Patents

Abstract

The utility model relates to a rectifying and noise-reducing shell and a gas water heater. The rectifying and noise reducing shell comprises a shell and a silencing plate, the silencing plate is arranged in the shell, an air inlet channel is formed between the silencing plate and the side wall of the shell, the shell is provided with an air inlet communicated with the air inlet channel, and the air inlet is arranged on any wall of the shell except the back wall of the shell. The silencing plate is provided with a silencing through hole communicated with the air inlet channel; the air inlet and the silencing through holes are positioned at two ends of the air inlet channel. In the process that air enters the gas water heater from the air inlet, the rectifying and noise reducing shell can rectify air flow so as to reduce air flow noise. The noise generated during the operation of the gas water heater can consume more sound energy in the transmission process along the silencing through hole and the air inlet channel, thereby reducing noise.

Description

Rectifying noise-reducing shell and gas water heater

Technical Field

The utility model relates to the technical field of noise reduction of water heaters, in particular to a rectifying noise reduction shell and a gas water heater.

Background

The gas water heater is widely used as the gas water heater is ready to use, stable in heating and small in occupied area.

The prior gas water heater shell generally comprises a back wall, a surface wall, a bottom wall, a top wall and two side walls, wherein an air inlet of the gas water heater is usually arranged on the back wall of the shell, and when the gas water heater is installed, the back wall of the shell is close to the wall. When the gas water heater catches up the air required by combustion, larger flow resistance is formed between the wall and the back wall of the shell, obvious air flow noise is generated, and the air flow noise is relatively sharp. When the gas water heater works, noise in the gas water heater can be transmitted to the outside of the shell through the air inlet, and the noise is reflected at the wall after being transmitted from the air inlet because the air inlet is close to the wall, so that the gas water heater works with larger noise; in addition, the shell of the gas water heater easily resonates in the process, and the gas water heater is easily damaged.

Disclosure of Invention

Based on the above, the first technical problem to be solved by the present utility model is to provide a rectifying and noise-reducing housing, which can effectively reduce the noise problem of the gas water heater during operation.

The second technical problem to be solved by the utility model is to provide a gas water heater, which generates less noise during operation.

The first technical problem is solved by the following technical scheme:

a rectifying noise reduction housing comprising:

a housing and a muffler plate;

the silencer plate is arranged in the shell, and an air inlet channel is formed between the silencer plate and the side wall of the shell;

the shell is provided with an air inlet communicated with the air inlet channel, and the air inlet is arranged on any wall except the back wall of the shell;

the silencing plate is provided with a silencing through hole communicated with the air inlet channel;

the air inlet and the silencing through holes are positioned at two ends of the air inlet channel.

Compared with the background technology, the rectifying noise reduction shell has the beneficial effects that: when the gas water heater is used, air enters the gas water heater from the air inlet in-process, because the air inlet is arranged on any wall of the shell except the back wall of the shell, the distance between the air inlet and the wall is larger, so that when the air enters the air inlet, the flowing resistance of the air at the air inlet is relatively smaller, obvious air flow turbulence noise can not be generated, after the noise is transmitted from the air inlet, the sound energy is attenuated rapidly, the resonance of the shell of the combustor can not be caused, the gas water heater is protected, and the structural strength of the shell can be enhanced because the silencer is arranged inside the shell, so that the gas water heater is protected. When the gas water heater operates, when air passes through the silencing through hole, the silencing through hole can rectify the air, and the disordered air is scattered to be gentle and uniform, so that noise is reduced. Meanwhile, the silencing through hole and the air inlet channel cavity form a micro-perforated sheet resonance silencing structure; noise generated in the gas water heater is transmitted out of the shell along the air inlet channel, and in the process, the incident sound wave of the noise can resonate with the silencing through hole to be silenced so as to attenuate sound energy, so that the noise is reduced. And the air inlet and the silencing through holes are positioned at two ends of the air inlet channel, so that the noise propagation path in the air inlet channel is longer, the sound energy is favorably attenuated, and the noise is favorably reduced.

In one embodiment, along the airflow direction of the air inlet channel, the silencing plate is provided with a first area and a second area in sequence, the first area is provided with a silencing structure, and the silencing through hole is arranged in the second area.

In the technical scheme, the second area is located in the direction away from the air inlet, so that the propagation path of noise can be increased, and the consumption of sound energy is increased; and the silencing structure is arranged in the air inlet channel, so that part of noise can be eliminated, and the noise is further reduced.

In one embodiment, the second region includes a first silencing region and a second silencing region, the second silencing region being located on a side of the first silencing region away from the first region; the first silencing area is provided with a plurality of first silencing through holes, and the second silencing area is provided with a plurality of second silencing through holes;

the aperture of the first silencing through hole is different from that of the second silencing through hole,

and/or the number of the first silencing through holes is different from the number of the second silencing through holes.

Through set up different aperture and/or different quantity first amortization through-hole, the second amortization through-hole in first amortization region and second amortization region, can carry out the amortization to the noise of different frequency. And the silencing through holes with the same aperture are arranged in the same silencing area, so that the preparation difficulty of the silencing plate can be reduced.

In one embodiment, the diameter of the first silencing through hole is 0.5mm-0.8mm, and the diameter of the second silencing through hole is 0.6mm-1mm.

In one embodiment, the total area of the silencing through holes is not smaller than the exhaust area of the gas water heater.

In one embodiment, a portion of the first silencing region protrudes toward a first direction that is parallel to an axial direction of the silencing through-hole.

Since the first silencing region protrudes toward the first direction, the width of the air intake passage at the first silencing region is changed, and it is possible to change the propagation direction of part of the air and noise and to lengthen the noise propagation path.

In one embodiment, a portion of the second sound deadening region protrudes toward a second direction, the second direction being opposite to the first direction. Because the first silencing area and the second silencing area are protruded towards opposite directions, the propagation path of noise changes, collision attenuation such as reflection, diffraction and refraction occurs in the transmission process of the noise at the second area conveniently, the sound energy of the noise is reduced, and the noise value becomes low.

In one embodiment, the silencing structure comprises a plurality of convex hulls which are distributed at intervals along the length square of the first area, and the convex hulls are protruded towards a direction close to the inner wall of the shell.

The arrangement of the convex hulls can prolong the noise propagation path, and when noise propagates along the air inlet channel, the noise collides with the convex hulls, so that the acoustic energy consumption is carried out.

In one embodiment, the air inlet is provided in the bottom wall of the housing.

Compared with the air inlet, the length of the air inlet channel can be increased by arranging the air inlet on the bottom wall of the shell, so that the propagation path of noise is prolonged.

The second technical problem is solved by the following technical scheme:

a gas water heater comprises the rectifying and noise-reducing shell.

Compared with the background technology, the gas water heater has the beneficial effects that: when the gas water heater is used, the air flow noise generated when the air enters is smaller. In addition, more sound energy is consumed in the rectifying and noise-reducing shell in the process of transmitting noise generated in the gas water heater out of the shell, so that noise generated when the gas water heater works is reduced.

Drawings

FIG. 1 is a schematic diagram of a gas water heater according to an embodiment of the present utility model (arrows in the figure indicate air flow directions);

FIG. 2 is an exploded view of a rectifying and noise-reducing housing according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a rectifying and noise-reducing housing (arrows indicate air flow direction) according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of a portion of FIG. 3 at a broken line (arrows indicate air flow directions);

FIG. 5 is a schematic structural view of a muffler plate of a rectifying and noise-reducing housing according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram illustrating an assembly of a rectifying noise reduction housing according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of a face-piece of a rectifying and noise-reducing housing according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a bottom shell of a rectifying noise reduction housing according to an embodiment of the utility model.

Reference numerals illustrate:

100. a housing; 101. an air inlet; 102. an air inlet channel; 110. a bottom case; 111. a top sealing plate; 112. installing a sealing plate; 113. a bottom sealing plate; 114. a first connection structure; 115. a flange; 116. an abutting plate; 120. a face shell; 121. a top plate; 122. a first side plate; 123. a second side plate; 124. a third side plate; 125. a second connection structure;

200. a muffler plate; 210. a first region; 211. a sound deadening structure; 220. a second region; 221. a first sound deadening region; 222. a second sound deadening region; 201. a sound deadening through hole; 201a, a first silencing through hole; 201b, a second sound deadening through hole.

Description of the embodiments

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, fig. 1 shows a schematic structure of a gas water heater according to an embodiment of the utility model. The embodiment of the utility model provides a gas water heater, which comprises a rectifying and noise-reducing shell. The rectifying and noise-reducing shell can effectively reduce noise generated when the gas water heater is used.

Referring to fig. 1-4, a rectifying and noise reducing housing according to an embodiment of the present utility model includes a housing 100 and a muffler plate 200. Wherein the silencer 200 is disposed in the casing 100. The muffler plate 200 forms an air inlet passage 102 with the sidewall of the housing 100. The housing 100 is provided with an air inlet 101 communicating with an air inlet passage 102, the air inlet 101 being provided on any one of the walls of the housing except the back wall thereof. It should be noted that, any of the aforementioned "walls except the back wall" may be a face wall, a bottom wall, a top wall, or a side wall of the housing 100. The silencer plate 200 is provided with silencing through holes 201 communicating with the air inlet duct 102. The intake port 101 and the silencing through-hole 201 are located at both end portions of the intake passage 102. When the gas water heater with the rectifying and noise-reducing shell is used, the rectifying and noise-reducing shell has good rectifying and noise-reducing effects. That is, in the process that air enters the gas water heater from the air inlet 101, the rectifying and noise reducing housing can rectify the air flow so as to reduce the air flow noise. The noise generated during the operation of the gas water heater can consume more sound energy in the transmission process along the silencing through hole 201 and the air inlet channel 102, thereby reducing noise.

Specifically, the following description is made with reference to fig. 3 and 4.

In fig. 3 and 4, the arrow direction is the air flow direction, and is also the opposite direction of noise transmission.

In the aspect of rectification, in the process that air enters the gas water heater from the air inlet 101, as the air inlet 101 is arranged on any wall of the shell 100 except the back wall of the shell, the distance between the air inlet 101 and the wall is larger, so that when the air enters the air inlet 101, the flowing resistance of the air at the air inlet 101 is relatively smaller, obvious air flow turbulence noise can not be generated, when the gas water heater operates, the air can be rectified by the silencing through holes 201, and the turbulence air is dispersed to be gentle and uniform, so that the noise is reduced.

In terms of noise reduction, since the air inlet 101 is provided on any wall of the housing 100 except the back wall thereof, so that the distance between the air inlet 101 and the wall is large, after noise is transmitted from the air inlet, sound energy is rapidly attenuated, and resonance of the housing 101 is not induced, thereby being beneficial to protecting the gas water heater. In addition, the sound deadening through-hole 201 and the air intake passage 102 form a microperforated sheet resonance sound deadening structure. In the process that noise generated in the gas water heater is transmitted out of the casing 100 along the air inlet channel 102, the incident sound wave of the noise can resonate with the silencing through hole 201 to be silenced, so that the sound energy is attenuated, and the noise is reduced. The air inlet 101 and the silencing through holes 201 are located at two ends of the air inlet channel 102, so that the noise propagation path in the air inlet channel 102 is longer, which is beneficial to damping acoustic energy and thus noise reduction.

In addition, compared with the conventional air intake technology adopting the strip-shaped holes or the shutter mode, the noise reduction through hole 201 is combined with the air intake channel 102 extending along the side wall of the casing 100, so that turbulent noise of air flow can be reduced better.

In some embodiments, the muffler plate 200 may be a strip plate. The silencer panel 200 may be fixedly attached to the inside of the casing 100, for example, by being attached to the casing 100 by spot welding.

Referring to fig. 2-5, in some embodiments, the silencer plate 200 is provided with a first region 210 and a second region 220 in succession along the airflow direction of the inlet duct 102. Wherein, the first region 210 is provided with a silencing structure 211, and the silencing through hole 201 is provided in the second region 220. Since the second region 220 is located in a direction away from the air inlet 101, a propagation path of noise along the sound-deadening through hole 201 to the air inlet 101 is long, and the consumption of acoustic energy can be increased; and the silencing structure 211 is arranged in the air inlet channel 102, so that part of noise can be eliminated, and the noise is further reduced.

In some embodiments, the length of the first region 210 may be greater than the length of the second region 220. The foregoing length refers to the extending direction of the muffler plate 200, that is, the extending direction of the air intake passage 102. Such an arrangement may make the distance between the sound deadening through-hole 201 and the intake port 101 as long as possible, so that the noise may be more consumed in the first region 210.

In some embodiments, sound attenuating structures 211 may include a number of convex hulls spaced along the length square of first region 210. The length direction of the first region 210 may be perpendicular to the airflow direction of the airflow channel 102. The convex hull may be convex toward a direction proximate the inner wall of the housing 100. The provision of the convex hull may lengthen the noise propagation path, and as noise propagates along the air intake passage 102, the noise collides with the convex hull, thereby dissipating acoustic energy.

Referring to fig. 4 and 5, in some embodiments, the convex hulls are arranged in parallel, spaced apart relation. In this arrangement, the muffler plate 200 having the plurality of convex hulls is formed like a half wave, i.e., like a repeated structure of concave-convex-concave. When the noise moves along the air inlet channel 102, the air inlet channel 102 is tortuous, so that a noise transmission path can be prolonged, the probability of collision attenuation such as reflection, diffraction, refraction and the like of the noise in the transmission process is increased, and therefore the sound energy of the noise is greatly reduced, and the noise value is lowered. It will be appreciated that in some of these embodiments, the convex hulls may be evenly spaced. In other embodiments, the distance between partially adjacent convex hulls is different.

In some embodiments, the cross-sectional shape of the convex hull may be semicircular, quadrilateral, triangular, etc., and other shapes may be selected according to practical situations.

With continued reference to fig. 5, in some embodiments, the second region 220 may include a first muffling region 221 and a second muffling region 222. The second muffling area 222 is located on a side of the first muffling area 221 remote from the first area 210. Wherein the first silencing area 221 is provided with a plurality of first silencing through holes 201a. The second muffler area 222 is provided with a plurality of second muffler through holes 201b. The aperture of the first sound deadening through hole 201a is different from that of the second sound deadening through hole 201b. By arranging the first silencing region 221 and the second silencing region 222, silencing through holes 201 with different apertures can be arranged in a concentrated mode, and processing and preparation of the silencing plate are facilitated.

In some embodiments, the aperture of the first sound deadening through hole 201a is different from the aperture of the second sound deadening through hole 201b. The silencing through holes 201 with different apertures can silence noises with different bandwidths. Noise in more bandwidth ranges can be silenced by arranging the silencing through holes 201 with different apertures, and noise silencing effect is enhanced. The muffler through holes 201 of the same aperture are provided in the same muffler area, and the manufacturing complexity of the muffler plate 200 can be reduced. It is understood that in some other embodiments, the aperture of the first sound deadening through hole 201a and the aperture of the second sound deadening through hole 201b may be the same.

In some embodiments, the diameter of the first sound deadening through hole 201a is 0.5mm to 0.8mm. For example, the aperture of the first sound deadening through hole 201a may be 0.5mm, 0.6mm, 0.7mm, 0.8mm, or the like. In some embodiments, the diameter of the second sound deadening through hole 201b is 0.6mm to 1mm. For example, the aperture of the second sound deadening through hole 201b may be 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, or the like.

In some embodiments, the number of first silencing through holes 201a may be different from the number of second silencing through holes 201b. For example, in some embodiments, the number of the first silencing through holes 201a is smaller than the number of the second silencing through holes 201b, and this arrangement may allow more noise to pass through the second silencing through holes 201b that are further away from the air inlet 101, so as to extend the noise propagation path while ensuring the total area of the silencing through holes 201. For example, in a specific embodiment, the number of the first silencing through holes 201a is 200, and the number of the second silencing through holes 201b is 2000. It is understood that the number of the first and second silencing through holes 201a and 201b may be adjusted according to practical situations.

It is understood that in some other embodiments, the number of first sound deadening through holes 201a may be the same as the number of second sound deadening through holes 201b.

It should be noted that, in some embodiments, the aperture of the first silencing through holes 201a is different from the aperture of the second silencing through holes 201b, and the number of the first silencing through holes 201a is different from the number of the second silencing through holes 201b. In other embodiments, the apertures of the first silencing through holes 201a are different from those of the second silencing through holes 201b, and the number of the first silencing through holes 201a is the same as that of the second silencing through holes 201b. In other embodiments, the aperture of the first silencing via 201a is the same as the aperture of the second silencing via 201b, and the aperture of the first silencing via 201a is different from the aperture of the second silencing via 201b. The aperture and number of the silencing through holes 201 can be selected according to practical situations.

In some embodiments, the distance between any adjacent first sound-deadening through holes 201a is greater than the distance between any adjacent second sound-deadening through holes 201b. By the arrangement mode, more air and noise can pass through the second silencing through holes 201b, and the path of the noise in the air inlet channel 102 is increased, so that a better silencing effect is achieved.

In some embodiments, the total area S of the silencing through holes 201 may be equal to or greater than the exhaust area of the gas water heater (taking a circular shape with a radius r as an example of the cross-sectional area of the exhaust passage, and the exhaust area is pi r). Such an arrangement may allow for a gas water heater to have sufficient air intake when in use to achieve adequate combustion of the gas. The total area s= (the first silencing passage area s1 formed by all the first silencing through holes 201 a+the first silencing passage area S2 formed by all the second silencing through holes 201 b) of the silencing plates 200. That is, n (S1+S2). Gtoreq.pi.r.

In some embodiments, a portion of the first sound deadening region 221 protrudes toward a first direction, which is parallel to the axial direction of the sound deadening through hole 201. It is understood that the first direction may be a direction from the inside of the housing 100 to the outer wall of the housing 100, or may be a direction from the outer wall of the housing 100 to the inside of the housing 100. Since the first sound deadening region 221 protrudes toward the first direction, the width of the air intake passage 102 at the first sound deadening region 221 is changed, and it is possible to change the propagation direction of part of the air and the noise, and to lengthen the noise propagation path.

In some embodiments, portions of second muffling area 222 protrude toward the second direction. The second direction is opposite to the first direction. Since the second muffling area 222 protrudes toward the second direction, the width of the intake passage 102 at the second muffling area 222 is changed, and the propagation direction of part of the air and noise can be changed, and the noise propagation path can be prolonged.

Referring to fig. 4 and 5, in some embodiments, a portion of the first muffling area 221 protrudes toward a first direction and a portion of the second muffling area 222 protrudes toward a second direction. The first silencing region 221 and the second silencing region 222 are protruded in opposite directions, so that a noise path is longer in the transmission process, collision attenuation of reflection, diffraction, refraction and the like in the transmission process of the noise at the second region 220 is facilitated, sound energy of the noise is reduced, and a noise value is lowered.

It will be appreciated that in some other embodiments, portions of first muffling area 221 protrude toward a first direction and second muffling area 222 does not protrude toward a second direction. In other embodiments, the first muffling area 221 does not protrude toward the first direction, and the portion of the second muffling area 222 protrudes toward the second direction.

Referring back to fig. 1 and 3, in some embodiments, the air inlet 101 may be provided in the bottom wall of the housing 100. Compared with the air inlet 101 arranged at the side wall of the casing 100, the arrangement mode can prolong the length of the air inlet channel 102 as much as possible, thereby increasing the rectifying and silencing effects of the rectifying and noise reducing casing. It will be appreciated that in some other embodiments, the air inlet 101 may be provided with a portion of the side wall of the housing 100 adjacent to the bottom wall of the housing 100.

In some embodiments, the width of the air inlet 101 may be 10mm-30mm. The width is indicated by L in FIG. 3. The width of the air inlet 101 can be adjusted according to practical situations.

Referring back to fig. 1, in some embodiments, the number of air inlets 101 may be two. The two air inlets 101 are provided on both sides of the bottom wall of the housing 100, respectively. Correspondingly, the number of the silencing plates 200 is two, and the silencing plates are respectively arranged in one-to-one correspondence with the air inlets 101. By arranging the two air inlets 101 and the two silencer plates 200, two air inlet channels 102 are arranged in one gas water heater, so that the air inlet amount is increased, the length of the first area 210 is increased while the total area of the silencer through holes 201 is larger than or equal to the exhaust area of the gas water heater, and the silencer through holes 201 are located at positions, far away from the air inlets 101, of the silencer plates 200.

Referring to fig. 2, the housing 100 may include a bottom case 110 and a face case 120. The bottom case 110 is connected with the face case 120. A side of the bottom case 110 may have a space with the face case 120 to form the air inlet 101. The bottom shell 110 and the face shell 120 may be detachably connected, so that maintenance difficulty is reduced during subsequent maintenance of the gas water heater. The muffler 200 may be disposed in a space defined by the bottom case 110 and the face case 120. That is, the muffler plate 200 may be connected to the bottom case 110, the face case 120, or both the bottom case 110 and the face case 120. When the muffler plate 200 is connected to the corresponding bottom case 110 or the face case 120, a fixed connection manner may be selected so as to form a stable air intake passage 102.

Referring to fig. 2 and 6, in some embodiments, the bottom case 110 is provided with a first connection structure 114. The face housing 120 is provided with a second connection structure 125. The first connection structure 114 cooperates with the second connection structure 125 to connect the bottom case 110 with the face case 120.

In one embodiment, one of the first connection structure 114 and the second connection structure 125 is a hook structure, and the other is a slot structure. The hook structure is clamped with the clamping groove structure to realize detachable connection of the bottom shell 110 and the face shell 120. In other embodiments, the housing 100 may also include fasteners (not shown). Fasteners may connect the bottom case 110 and the face case 120 to achieve fastening of the bottom case 110 and the face case 120. For example, in some embodiments, the fastener may be selected from bolts or screws.

In some embodiments, the number of the first connection structures 114 and the second connection structures 125 may be two or more. The first connection structures 114 may be disposed at intervals on the bottom case 110, and the second connection structures 125 may be disposed at intervals on corresponding positions of the face case 120. The arrangement manner can make the connection parts of the bottom shell 110 and the face shell 120 uniformly disperse, and reduce the stress of the single first connection structure 114 and the second connection structure 125.

Referring to fig. 2 and 7, in some embodiments, the face housing 120 may include a top plate 121, a first side plate 122, a second side plate 123, and a third side plate 124. Wherein the top plate 121 is located at the top of the gas water heater. The first side plate 122, the second side plate 123 and the third side plate 124 are sequentially connected, and the first side plate 122 and the third side plate 124 are disposed opposite to each other. That is, the first side plate 122 and the third side plate 124 form side walls of the housing 100, and the second side plate 123 forms a face wall of the housing 100. The top plate 121, the first side plate 122, the second side plate 123, and the third side plate 124 may be integrally formed.

Referring to fig. 2 and 8, in some embodiments, the bottom case 110 may include a top sealing plate 111, a mounting sealing plate 112, and a bottom sealing plate 113 connected in sequence. The top sealing plate 111 is disposed opposite the bottom sealing plate 113. The top closure plate 111 abuts the top plate 121 to form a top wall of the housing 100. The bottom sealing plate 113 is the bottom wall of the housing 100. The mounting plate 112 is the back wall of the housing 100. Wherein the opposite sides of the top closure plate 111 may be provided with flanges 115. The two flanges 115 may be connected to the first side plate 122 and the third side plate 124, respectively. In some embodiments, the first connection structure 114 may be located at the flange 115, and the second connection structure 125 may be disposed at the corresponding first side plate 122 or third side plate 124.

With continued reference to fig. 2, 6, and 8, in some embodiments, the bottom shell 110 may further include an abutment plate 116. The abutment plate 116 may be provided on a side of the flange 115 near the middle of the mounting plate 112. The abutment plate 116 may be connected with the muffler plate 200 to achieve connection of the muffler plate 200 with the housing 100.

Referring to fig. 3, in the direction of the first to third side plates 122 to 124, the length of the bottom closure plate 113 may be smaller than the length between the first and third side plates 122 and 124 such that the air inlet 101 is formed between the bottom closure plate 113 and the first and third side plates 122 or the air inlet 101 is formed between the bottom closure plate 113 and the third side plate 124 or the air inlet 101 is formed between both sides of the bottom closure plate 113 and the first and third side plates 122 and 124, respectively. That is, the distance between the side edge of the bottom sealing plate 113 and the first side plate 122 or the second side plate 123 is L (shown in fig. 3), where L is the width of the corresponding air inlet 101.

In some other embodiments, the length of the bottom closure plate 113 may be equal to the length between the first side plate 122 and the third side plate 124. Correspondingly, the portion of the first side plate 122 and/or the third side plate 124 near the bottom sealing plate 113 may be provided with an air inlet 101, so that air may enter the air inlet channel through the air inlet 101.

The rectifying and noise-reducing shell has a good silencing and rectifying effect, less airflow noise can be generated when the gas water heater is used for air intake, and air entering the gas water heater is rectified. Meanwhile, when noise generated by the gas water heater is transmitted through the housing 100, a good noise reduction effect can be obtained.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A rectifying noise reduction housing, comprising: a housing (100) and a muffler plate (200); the silencer plate (200) is arranged in the shell (100), and an air inlet channel (102) is formed between the silencer plate (200) and the side wall of the shell (100);

the shell (100) is provided with an air inlet (101) communicated with the air inlet channel (102), and the air inlet (101) is arranged on any wall except the back wall of the shell (100);

the silencing plate (200) is provided with a silencing through hole (201) communicated with the air inlet channel (102);

the air inlet (101) and the silencing through hole (201) are positioned at two ends of the air inlet channel (102).

2. The rectifying and noise-reducing housing according to claim 1, characterized in that, along the air flow direction of the air inlet channel (102), the silencer plate (200) is provided with a first area (210) and a second area (220) in sequence, the first area (210) is provided with a silencing structure (211), and the silencing through hole (201) is arranged in the second area (220).

3. The rectifying and noise-reducing housing according to claim 2, characterized in that said second zone (220) comprises a first muffling zone (221) and a second muffling zone (222), said second muffling zone (222) being located at a side of said first muffling zone (221) remote from said first zone (210); the first silencing region (221) is provided with a plurality of first silencing through holes (201 a), and the second silencing region (222) is provided with a plurality of second silencing through holes (201 b);

the aperture of the first silencing through hole (201 a) is different from the aperture of the second silencing through hole (201 b),

and/or the number of the first silencing through holes (201 a) is different from the number of the second silencing through holes (201 b).

4. A rectifying and noise reducing housing according to claim 3, characterized in that the diameter of the first sound damping through hole (201 a) is 0.5-0.8 mm and the diameter of the second sound damping through hole (201 b) is 0.6-1 mm.

5. The rectifying and noise reducing housing according to claim 1, characterized in that the total area of the silencing through holes (201) is not smaller than the exhaust area of the gas water heater.

6. A rectifying and noise reducing housing according to claim 3, characterized in that a portion of the first sound deadening region (221) protrudes towards a first direction, which is parallel to the axial direction of the sound deadening through hole (201).

7. The rectifying and noise reducing housing according to claim 6, characterized in that a portion of said second sound damping area (222) protrudes towards a second direction, said second direction being opposite to said first direction.

8. The rectifying and noise reducing housing according to claim 2, characterized in that said sound attenuating structure (211) comprises a plurality of convex hulls spaced apart along the length square of said first area (210), said convex hulls protruding in a direction close to the inner wall of said shell (100).

9. The rectifying and noise reducing housing according to any of the claims 1-8, characterized in that said air inlet (101) is provided at the bottom wall of said outer shell (100).

10. A gas water heater comprising the rectifying and noise reducing housing of any one of claims 1-9.