Silencer for gas water heater, air inlet structure and gas water heater

Abstract

The utility model relates to the technical field of gas water heaters, and particularly discloses a silencer for a gas water heater, an air inlet structure and the gas water heater, the silencer comprises a bent pipe, and the bent pipe comprises a first end part, a second end part and a side wall located between the first end part and the second end part; an air inlet part and an air outlet part are arranged on the bent pipe; the air inlet part is arranged on the first end part, and at least part of the air outlet part is arranged on the second end part; the air inlet part is communicated with an air inlet in a shell of the gas water heater; gas can flow into the bent pipe from the air inlet part and then flow out of the bent pipe through the air outlet part. And a part of the side wall is recessed inwards to form a bent noise reduction structure. According to the silencer, noise transmitted out of the gas water heater can be greatly reduced, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of gas water heaters, and in particular to a silencer for a gas water heater, an air inlet structure and a gas water heater. BACKGROUND

[0002] With the improvement of people's living standards, users have higher and higher requirements for the silence of gas water heaters. At present, the gas water heater usually forms its air inlet by directly opening a plurality of through holes in the back plate of its shell, and air enters the whole machine through the plurality of through holes. Although this structure is simple in design and low in manufacturing cost, it causes the operation noise of the water heater to be conducted to the user side due to the plurality of through holes in the shell, resulting in a large noise transmitted to the outside of the water heater, affecting the user experience.

[0003] At present, no effective solution has been proposed for the above problems. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present specification provide a silencer for a gas water heater, an air inlet structure and a gas water heater to solve the problem of large noise transmitted to the outside of the water heater in the prior art.

[0005] The embodiments of the present specification provide a silencer for a gas water heater, the silencer comprising a bent pipe, the bent pipe comprising a first end portion, a second end portion and a side wall between the first end portion and the second end portion;

[0006] The bent pipe is provided with an air inlet portion and an air outlet portion; the air inlet portion is arranged on the first end portion, and at least part of the air outlet portion is arranged on the second end portion; the air inlet portion is in communication with an air inlet on the shell of the gas water heater; gas can flow into the bent pipe from the air inlet portion and then flow out of the bent pipe through the air outlet portion;

[0007] Part of the side wall is inwardly recessed to form a bent silencing structure.

[0008] In one embodiment, along the direction of gas flow, the gas flow area in the bent pipe first gradually decreases and then gradually increases.

[0009] In one embodiment, the opening area of the air outlet portion is smaller than the opening area of the air inlet portion.

[0010] In one embodiment, the plane in which the first end portion is located intersects the plane in which the second end portion is located.

[0011] In one embodiment, the opening direction of the air outlet portion is perpendicular to or forms an acute angle with the opening direction of the air inlet portion.

[0012] In one embodiment, a projection of the bent sound-absorbing structure on the first end portion at least partially overlaps with the air inlet portion; and / or,

[0013] a projection of the bent sound-absorbing structure on the second end portion at least partially overlaps with the air outlet portion.

[0014] In one embodiment, the air outlet portion includes a main air outlet portion and a secondary air outlet portion;

[0015] the main air outlet portion is arranged on the second end portion;

[0016] the secondary air outlet portion is arranged on the side wall other than the inwardly recessed side wall.

[0017] In one embodiment, the gas flow resistance of the secondary air outlet portion is greater than the gas flow resistance of the main air outlet portion.

[0018] In one embodiment, the opening area of the secondary air outlet portion is smaller than the opening area of the main air outlet portion.

[0019] In one embodiment, the main air outlet portion includes one or more first air outlet holes;

[0020] the secondary air outlet portion includes one or more second air outlet holes;

[0021] the opening area of the first air outlet hole is greater than the opening area of the second air outlet hole.

[0022] In one embodiment, the opening direction of the main air outlet portion is perpendicular to the opening direction of the secondary air outlet portion.

[0023] In one embodiment, the secondary air outlet portion is arranged on the side wall close to the second end portion.

[0024] In one embodiment, the sound-absorbing device is made by a blow molding process.

[0025] The embodiments of the present disclosure further provide an air inlet structure, comprising:

[0026] the sound-absorbing device as described in any of the above embodiments;

[0027] a water heater shell, the water heater shell being provided with an air inlet, the sound-absorbing device being located in the water heater shell and mounted on the inner wall of the water heater shell, the air inlet portion of the sound-absorbing device being in communication with the air inlet.

[0028] In one embodiment, the water heater housing comprises a frame, a top plate and a cover plate, the frame comprises a first vertical plate, a back plate and a second vertical plate connected in sequence; the cover plate is arranged opposite to the back plate, and the top plate is connected to the upper side of the first vertical plate, the second vertical plate and the back plate.

[0029] The air inlet is arranged on the upper portion of the back plate.

[0030] In one embodiment, the air inlet comprises a plurality of air inlet holes arranged on the upper portion of the back plate.

[0031] In one embodiment, the muffler is connected to the back plate and / or the first vertical plate; or,

[0032] The muffler is connected to the back plate and / or the second vertical plate.

[0033] In one embodiment, the main air outlet portion of the muffler is arranged opposite to the top plate, and there is a gap between the main air outlet portion and the top plate.

[0034] The embodiments of the present disclosure further provide a gas water heater, comprising:

[0035] The air inlet structure in any of the above embodiments;

[0036] A fan arranged in the water heater housing of the air inlet structure.

[0037] In one embodiment, the fan is arranged close to the top plate of the water heater housing.

[0038] In one embodiment, the air inlet portion of the muffler of the air inlet structure is in communication with the air inlet on the water heater housing, the main air outlet portion of the muffler is arranged opposite to the top plate, and there is a gap between the main air outlet portion and the top plate.

[0039] When the fan is running, part of the gas flowing into the muffler from the air inlet via the air inlet portion flows out of the muffler via the main air outlet portion, and then flows to the top plate and then flows downward from the top plate to the gap between the water heater housing and the lower portion of the fan, the heat exchanger, the surrounding frame and / or the combustion device of the gas water heater; part of the surrounding frame between the heat exchanger and the combustion device forms a combustion chamber.

[0040] In one embodiment, the fan comprises a volute arranged in sequence along the transverse direction and a motor connected to the volute; there is a gap space between the volute and the motor, and the air flowing out of the air outlet portion of the muffler in the air inlet structure can flow to the gap space.

[0041] In one embodiment, the secondary air outlet of the muffler is arranged opposite to the motor.

[0042] In one embodiment, the top plate of the water heater shell is provided with a smoke outlet, which is in communication with the outlet of the fan.

[0043] The gas water heater further comprises a wind shield cap, which is arranged above the smoke outlet, and the wind shield cap comprises a first pipe body, a second pipe body and a third pipe body arranged in sequence from bottom to top, the size of the first pipe body is larger than that of the third pipe body, and the second pipe body is used for connecting the first pipe body and the third pipe body.

[0044] In one embodiment, the gas water heater further comprises:

[0045] The first baffle forms a first air cooling channel with the back plate of the frame, the back plate is provided with a first air cooling hole, and gas can flow into the first air cooling channel from the first air cooling hole and then flow to the heat exchanger from the first air cooling channel.

[0046] The second baffle forms a second air cooling channel with the front plate of the frame, the front plate is provided with a second air cooling hole, and gas can flow into the second air cooling channel from the second air cooling hole and then flow to the heat exchanger from the second air cooling channel.

[0047] The first heat insulation cotton is connected with the first side plate of the frame.

[0048] The second heat insulation cotton is connected with the second side plate of the frame.

[0049] The technical solution of the present specification has the following remarkable beneficial effects:

[0050] The muffler in the embodiment of the present specification comprises a bent pipe, which comprises a first end portion, a second end portion and a side wall between the first end portion and the second end portion, the bent pipe is provided with an air inlet portion and an air outlet portion, the air inlet portion is arranged on the first end portion, at least part of the air outlet portion is arranged on the second end portion, the air inlet portion is in communication with an air inlet on the shell of the gas water heater, part of the side wall is inwardly recessed to form a bent sound attenuation structure, gas can flow into the bent pipe from the air inlet portion and then flow out of the bent pipe through the air outlet portion, thereby realizing air guiding and sound attenuation functions. Through the side wall between the first end portion and the second end portion of the muffler, part of the operation noise in the shell of the gas water heater can be blocked, so as to avoid the noise directly passing through the air inlet portion and being transmitted outside the gas water heater, thereby realizing preliminary noise reduction. In addition, through the bent sound attenuation structure formed by the inward recess of part of the side wall, part of the operation noise entering the bent pipe through the air outlet portion of the muffler is blocked and reflected, and then is transmitted out of the shell of the gas water heater from the air inlet portion, so that the transmitted noise is greatly reduced, thereby realizing further noise reduction.

[0051] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0052] It should be emphasized that the term "comprising / including" as used herein refers to the presence of a feature, part, step, or component, but does not exclude the presence or addition of one or more other features, parts, steps, or components. Attached Figure Description

[0053] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances. In the drawings:

[0054] Figure 1 A schematic diagram of a silencer for a gas water heater according to one embodiment of this specification is shown;

[0055] Figure 2 A front view of a silencer for a gas water heater according to one embodiment of this specification is shown;

[0056] Figure 3 A rear view of a silencer for a gas water heater according to one embodiment of this specification is shown;

[0057] Figure 4 A left view of a silencer for a gas water heater according to one embodiment of this specification is shown;

[0058] Figure 5 A top view of a silencer for a gas water heater according to one embodiment of this specification is shown;

[0059] Figure 6 A schematic diagram of the air inlet structure in one embodiment of this specification is shown;

[0060] Figure 7 A rear view of the air intake structure in one embodiment of this specification is shown;

[0061] Figure 8 A front view of the air inlet structure in one embodiment of this specification is shown;

[0062] Figure 9 A structure schematic diagram of the gas water heater in an embodiment of the present specification is shown.

[0063] Figure 10 A front view of the gas water heater in an embodiment of the present specification is shown.

[0064] Reference signs of the above drawings:

[0065] 100, muffler; 101, elbow pipe; 111, first end; 112, second end; 113, side wall; 102, air inlet part; 103, air outlet part; 131, main air outlet part; 132, secondary air outlet part; 104, elbow muffling structure;

[0066] 10, air inlet structure; 200, water heater shell; 201, air inlet; 202, frame; 203, top plate; 221, first vertical plate; 222, second vertical plate; 223, back plate;

[0067] 1, gas water heater; 20, fan; 21, volute; 22, motor; 30, heat exchanger; 40, combustion device; 50, enclosure; 60, wind shield; 61, first pipe body; 62, second pipe body; 63, third pipe body. DETAILED DESCRIPTION

[0068] The principles and spirits of the present specification will be described below with reference to a number of exemplary embodiments. It should be understood that these embodiments are given only so that those skilled in the art can better understand and implement the present specification, and do not limit the scope of the present specification in any way. On the contrary, these embodiments are provided so that the present specification disclosure is more thorough and complete, and the scope of the present disclosure is fully conveyed to those skilled in the art.

[0069] The details of the utility model can be understood more clearly in combination with the description of the drawings and the specific embodiments of the utility model. However, the specific embodiments of the utility model described herein are only used for the purpose of explaining the utility model, and cannot be understood as limiting the utility model in any way. Under the guidance of the utility model, the skilled person can conceive any possible deformation based on the utility model, which should be regarded as belonging to the scope of the utility model. It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "mounting", "connection", "connection" should be understood broadly, for example, it can be a mechanical connection or an electrical connection, or it can be a connection between two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiment.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification was chosen as used in the description of the specific embodiments only for the purpose of describing the specific embodiments and is not intended to limit the specification. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0071] The embodiment of the present specification provides a muffler for a gas water heater. The muffler can be arranged inside the shell of the gas water heater. Please refer to Figures 1 to 5 , Figures 1 to 5 The three-dimensional structure schematic diagram, front view, back view, left view and top view of the muffler for the gas water heater in the embodiment of the present specification are shown respectively.

[0072] As Figures 1 to 5 shown, the muffler 100 can include a bent pipe 101. The bent pipe 101 can include a first end 111, a second end 112 and a side wall 113 between the first end 111 and the second end 112. Through the side wall 113 between the first end 111 and the second end 112 of the muffler 100, part of the operation noise in the shell of the gas water heater can be blocked, reducing or avoiding the noise directly passing out of the shell outside through the air inlet 102, realizing preliminary noise reduction.

[0073] The air inlet portion 102 and the air outlet portion 103 can be arranged on the bent pipe 101. The air inlet portion 102 can be arranged on the first end portion 111. At least part of the air outlet portion 103 can be arranged on the second end portion 112. In an embodiment, the air inlet portion 102 can include one or more openings arranged on the first end portion 111. In an embodiment, the air outlet portion 103 can include one or more openings arranged on the second end portion 112.

[0074] The air inlet portion 102 of the muffler 100 is in communication with an air inlet on the housing of the gas water heater. After the gas outside the gas water heater enters the burner housing through the air inlet on the burner housing, at least part of the gas can flow into the bent pipe 101 from the air inlet portion 102 of the muffler 100 and then flow out of the bent pipe 101 through the air outlet portion 103, realizing the air guiding function. The part of the side wall 113 is inwardly recessed to form the bent sound attenuation structure 104. The bent sound attenuation structure 104 formed by the inward recess of the part of the side wall 113 blocks and reflects part of the operating noise that enters the bent pipe 101 through the air outlet portion 103 of the muffler 100, and then transmits it out of the gas water heater housing, so that the transmitted noise is greatly reduced, realizing further noise reduction.

[0075] As shown in Figures 1 to 3 In some embodiments of the present specification, the gas flow area in the bent pipe 101 gradually decreases and then gradually increases along the gas flow direction. The gas flow direction is the direction in which the gas flows from the air inlet portion 102 of the muffler 100 into the bent pipe 101 and then flows out of the air outlet portion 103. Along the gas flow direction, the gas flow area gradually decreases and then gradually increases. Correspondingly, along the noise propagation direction, the noise propagation area in the bent pipe 101 gradually decreases and then gradually increases. The noise propagation direction is the direction in which the noise transmits from the air outlet portion 103 of the muffler 100 into the bent pipe 101 and then transmits out of the air inlet portion 102. By arranging the bent pipe 101 as a variable diameter structure, noise reduction can be achieved on the sound propagation path, improving the noise reduction effect of the muffler 100.

[0076] As shown in Figures 1 to 5 In some embodiments of the present specification, the opening area of the air outlet portion 103 is smaller than the opening area of the air inlet portion 102. By arranging the opening area of the air outlet portion 103 to be smaller than the opening area of the air inlet portion 102, only a small part of the operating noise in the gas water heater housing can pass through the air outlet portion 103 into the bent pipe 101, thereby reducing the amount of noise transmitted to the outside and improving the noise reduction effect of the muffler 100.

[0077] As shown in Figures 1 to 3As shown, in some embodiments of this specification, the plane containing the first end 111 intersects with the plane containing the second end 112. By setting the plane containing the first end 111 and the plane containing the second end 112 to intersect rather than be parallel, the difficulty of noise entering the bend pipe 101 from the air outlet 103 and being transmitted through the air inlet 102 can be increased, thereby improving the noise reduction effect of the silencer 100.

[0078] like Figures 1 to 3 As shown, in some embodiments of this specification, the opening orientation of the air outlet 103 is perpendicular to or forms an acute angle with the opening orientation of the air inlet 102. The opening orientations of the air outlet 103 and the air inlet 102 are... Figures 1 to 3 The arrows are used to indicate this. For example... Figures 1 to 3 As shown, the opening orientation of the air outlet 103 and the opening orientation of the air inlet 102 can be perpendicular to each other. It is understood that in some embodiments, the opening orientation of the air outlet 103 can form an acute angle with the opening orientation of the air inlet 102. Compared to setting the opening orientation of the air outlet 103 to form an obtuse angle or a 180-degree angle with the opening orientation of the air inlet 102, this embodiment, by setting the opening orientation of the air outlet 103 perpendicular to or at an acute angle with the opening orientation of the air inlet 102, allows the bent noise-reducing structure 104 between the air outlet 103 and the air inlet 102 to block more noise entering the bent pipe 101, thereby improving the noise reduction effect of the silencer 100.

[0079] like Figures 1 to 3 As shown, in some embodiments of this specification, the projection of the bent noise-absorbing structure 104 on the first end 111 at least partially overlaps with the air inlet 102. By configuring the bent noise-absorbing structure 104 such that its projection on the first end 111 at least partially overlaps with the air inlet 102, the bent noise-absorbing structure 104 can block noise propagating from the bent pipe 101 toward the air inlet 102, thereby improving the noise reduction effect.

[0080] like Figures 1 to 3 As shown, in some embodiments of this specification, the projection of the bent noise-absorbing structure 104 on the second end 112 at least partially overlaps with the air outlet 103. By configuring the bent noise-absorbing structure 104 such that its projection on the second end 112 at least partially overlaps with the air outlet 103, the bent noise-absorbing structure 104 can block noise entering the bent pipe 101 from the air outlet 103, thereby improving the noise reduction effect.

[0081] like Figure 1 and Figure 2As shown in some embodiments of the present disclosure, the air outlet portion 103 can include a primary air outlet portion 131 and a secondary air outlet portion 132. The primary air outlet portion 131 can be arranged on the second end portion 112. The secondary air outlet portion 132 can be arranged on the side wall 113 except for the inwardly recessed side wall 113. By arranging the primary air outlet portion 131 and the secondary air outlet portion 132, the air flow into the gas water heater shell can be increased, and the air guiding effect of the muffler 100 can be improved.

[0082] In some embodiments of the present disclosure, the air flow resistance of the secondary air outlet portion 132 is greater than the air flow resistance of the primary air outlet portion 131. By setting the air flow resistance of the secondary air outlet portion 132 to be greater than the air flow resistance of the primary air outlet portion 131, the air flowing into the elbow pipe 101 through the air inlet portion 102 can be preferentially discharged from the primary air outlet portion 131.

[0083] As shown in some embodiments of the present disclosure, Figure 1 and Figure 2 the opening area of the secondary air outlet portion 132 is less than the opening area of the primary air outlet portion 131. By setting the opening area of the secondary air outlet portion 132 to be less than the opening area of the primary air outlet portion 131, most of the air flowing into the elbow pipe 101 through the air inlet portion 102 can be discharged from the primary air outlet portion 131.

[0084] As shown in some embodiments of the present disclosure, Figure 1 and Figure 2 the primary air outlet portion 131 can include one or more first air outlet holes. The secondary air outlet portion 132 can include one or more second air outlet holes. The opening area of the first air outlet hole is greater than the opening area of the second air outlet hole. By setting the opening area of the first air outlet hole of the primary air outlet portion 131 to be greater than the opening area of the second air outlet hole of the secondary air outlet portion 132, the air passing resistance of the first air outlet hole can be less than the air passing resistance of the second air outlet hole, so that the air flowing in through the air inlet portion 102 can be preferentially discharged from the first air outlet hole (i.e., the primary air outlet portion 131).

[0085] As shown in some embodiments of the present disclosure, Figure 1 and Figure 2 the opening direction of the primary air outlet portion 131 is perpendicular to the opening direction of the secondary air outlet portion 132. By setting the opening direction of the primary air outlet portion 131 to be perpendicular to the opening direction of the secondary air outlet portion 132, the flow directions of the two parts of air flowing into the gas water heater through the primary air outlet portion 131 and the secondary air outlet portion 132, respectively, can be perpendicular to each other, so that different parts of the gas water heater can be cooled.

[0086] As shown in some embodiments of the present disclosure, Figure 1 and Figure 2As shown, in some embodiments of the present application, the secondary air outlet portion 132 can be arranged on the side wall 113 close to the second end portion 112, i.e. close to the primary air outlet portion 131. By arranging the secondary air outlet portion 132 on the side wall 113 close to the second end portion 112, the bending sound-eliminating structure 104 of the sound eliminator 100 can be reused, so that the noise entering the bending pipe 101 through the secondary air outlet portion 132 can be reduced by the bending sound-eliminating structure 104, thereby further improving the noise reduction effect of the sound eliminator 100.

[0087] In some embodiments of the present application, the sound eliminator 100 is manufactured by a blow molding process. In this embodiment, the side wall 113 of the sound eliminator 100 is recessed to form the air-guiding and sound-eliminating bending sound-eliminating structure 104, which is suitable for being manufactured by a blow molding process, thereby saving the manufacturing cost of the sound eliminator 100.

[0088] The embodiments of the present application also provide an air inlet structure. Please refer to Figures 6 to 8 , which shows a perspective view, a back view and a front view of the air inlet structure in the embodiments of the present application. As shown in Figure 6 , the air inlet structure 10 can include a sound eliminator 100 and a water heater shell 200. The specific embodiments of the sound eliminator 100 can refer to the description in any of the above embodiments, which will not be repeated here.

[0089] As shown in Figures 6 to 8 , the water heater shell 200 can be provided with an air inlet 201. The air inlet 201 can include one or more openings on the water heater shell 200. The sound eliminator 100 is located in the water heater shell 200. The sound eliminator 100 can be mounted on the inner wall of the water heater shell 200. The air inlet portion 102 of the sound eliminator 100 communicates with the air inlet 201 on the water heater shell 200. The gas can enter the water heater shell 200 through the air inlet 201, then flow into the bending pipe 101 of the sound eliminator 100 through the air inlet portion 102 of the sound eliminator 100, and then flow out of the bending pipe 101 from the air outlet portion 103 of the sound eliminator 100.

[0090] The air inlet structure 10 in the above embodiment includes the water heater shell 200 and the silencer 100 arranged in the water heater shell 200. The side wall 113 between the first end 111 and the second end 112 of the silencer 100 can block part of the operation noise in the water heater shell 200, so as to avoid the operation noise directly passing out of the shell through the air inlet portion 102 and achieving preliminary noise reduction. The gas outside the gas water heater can enter the gas water heater shell 200 through the air inlet 201 on the water heater shell 200, then flow into the bent pipe 101 through the air inlet portion 102 of the silencer 100, and then flow out through the air outlet portion 103 of the silencer 100, so as to achieve the air guiding function. In addition, the bent silencing structure 104 formed by the inward recess of part of the side wall 113 can block and reflect part of the operation noise entering the bent pipe 101 through the air outlet portion 103 of the silencer 100, and then pass out of the water heater shell 200 from the air inlet portion 102, so that the noise passing out is greatly reduced and further noise reduction is achieved.

[0091] As shown in the drawings, Figure 6 In some embodiments of the present specification, the water heater shell 200 can include a frame 202, a top plate 203 and a cover plate (not shown in the drawings). The frame 202 can include a first vertical plate 221, a back plate 223 and a second vertical plate 222 connected in sequence. The cover plate can be arranged opposite to the back plate 223, and the top plate 203 is connected to the upper side of the first vertical plate 221, the second vertical plate 222 and the back plate 223. The air inlet 201 can be arranged on the upper part of the back plate 223.

[0092] As shown in the drawings, Figure 7 In some embodiments of the present specification, the air inlet 201 can include a plurality of air inlet holes arranged on the upper part of the back plate 223. By arranging a plurality of air inlet holes, impurities in the gas entering the water heater shell 200 can be filtered, and the noise passing out of the gas water heater through the air inlet portion 102 of the silencer 100 can be reduced.

[0093] In some embodiments of the present specification, the silencer 100 is connected to the back plate 223. In one embodiment, the first end 111 of the silencer 100 can be connected to the back plate 223 of the gas water heater, and the air inlet portion 102 arranged on the first end 111 is in communication with the air inlet 201 arranged on the back plate 223.

[0094] In some embodiments of the present specification, the silencer 100 is connected to the first vertical plate 221. In one embodiment, the side wall 113 of the silencer 100 can be connected to the first vertical plate 221 of the gas water heater, and the air inlet portion 102 of the silencer 100 is in communication with the air inlet 201 on the water heater shell 200.

[0095] In some embodiments of this specification, the silencer 100 is connected to the back plate 223 and the first vertical plate 221. In one embodiment, the first end 111 of the silencer 100 may be connected to the back plate 223 of the gas water heater, the side wall 113 of the silencer 100 may be connected to the first vertical plate 221 of the gas water heater, and the air inlet 102 of the silencer 100 is connected to the air inlet 201 on the water heater housing 200.

[0096] In some embodiments of this specification, the silencer 100 is connected to the second vertical plate 222. In one embodiment, the side wall 113 of the silencer 100 may be connected to the second vertical plate 222 of the gas water heater, and the air inlet 102 of the silencer 100 is connected to the air inlet 201 on the water heater housing 200.

[0097] In some embodiments of this specification, the silencer 100 is connected to the back plate 223 and the second vertical plate 222. In one embodiment, the first end 111 of the silencer 100 may be connected to the back plate 223 of the gas water heater, the side wall 113 of the silencer 100 may be connected to the second vertical plate 222 of the gas water heater, and the air inlet 102 of the silencer 100 is connected to the air inlet 201 on the water heater housing 200.

[0098] like Figure 8 As shown, in some embodiments of this specification, the second end 112 of the silencer 100 and the top plate 203 can be arranged opposite each other, and there is a gap between the second end 112 and the top plate 203. That is, the main air outlet 131 of the silencer and the top plate 203 can be arranged opposite each other, and there is a gap between the main air outlet 131 and the top plate 203. By arranging the main air outlet 131 of the silencer 100 and the top plate 203 opposite each other and having a gap between them, the operating noise inside the water heater casing 200 is transmitted to the top plate 203 and reflected by the top plate 203 before entering the air outlet 103 of the silencer 100. This not only reduces the amount of noise entering the air outlet 103, but also reduces the noise intensity entering the air outlet 103. In turn, it reduces the noise transmitted from the air inlet 102 of the silencer 100 and the air inlet 201 on the water heater casing 200, thereby further improving the noise reduction effect of the silencer 100. In addition, by setting the main air outlet 131 of the silencer 100 opposite to the top plate 203 of the water heater casing 200, the gas flowing into the silencer 100 from the air inlet 201 can flow to the top plate 203, and then from the top plate 203 to other components inside the gas water heater, so as to cool down the components inside the gas water heater.

[0099] This specification also provides an embodiment of a gas water heater. Please refer to... Figures 9 to 10 The diagram shows a perspective view and a front view of the gas water heater as described in the embodiments of this specification. Figure 9and Figure 10 As shown, the gas water heater 1 may include an air inlet structure 10 and a fan 20. Specific implementations of the air inlet structure 10 can be found in the descriptions of any of the above embodiments, and will not be repeated here. Figure 9 and Figure 10 As shown, the fan 20 can be installed inside the water heater casing 200 of the air inlet structure 10.

[0100] like Figure 9 and Figure 10 As shown, in some embodiments of this specification, the fan 20 may be installed close to the top plate 203 of the water heater casing 200. That is, the gas water heater 1 in this embodiment is a top-exhaust gas water heater.

[0101] like Figure 9 and Figure 10 As shown, in some embodiments of this specification, the gas water heater 1 may further include a heat exchanger 30, a combustion device 40, and a frame 50. The combustion device 40 is located below the heat exchanger 30 and is used to supply heat to the heat exchanger 30.

[0102] In one embodiment, the heat exchanger 30 may be mounted above the frame 50. In another embodiment, the upper part of the combustion device 40 is mounted inside the lower part of the frame 50, and the lower part of the combustion device 40 is located below the frame 50. The portion of the frame 50 located between the heat exchanger 30 and the combustion device 40 forms a combustion chamber. The frame 50 may include a front plate, a first side plate, a rear plate, and a second side plate connected in sequence. The front plate and the rear plate are disposed opposite each other, and the first side plate and the second side plate are disposed opposite each other.

[0103] The mixed air and fuel gas are ignited by the combustion device 40 and burned in the combustion chamber. The resulting high-temperature flue gas flows to the heat exchanger 30 and exchanges heat with the water flowing in the heat exchanger 30. The heat exchanger 30 can be located below the fan 20. The flue gas flowing through the heat exchanger 30 flows to the inlet of the fan 20 and is then discharged from the outlet of the fan 20.

[0104] like Figure 9 and Figure 10As shown, in some embodiments of the present application, the air inlet part 102 of the sound damper 100 of the air inlet structure 10 is in communication with the air inlet 201 on the water heater shell 200. The main air outlet part 131 of the sound damper 100 can be arranged opposite to the top plate 203, and there is a gap between the main air outlet part 131 and the top plate 203. When the fan 20 is running, part of the gas flowing into the sound damper 100 from the air inlet 201 via the air inlet part 102 flows out of the sound damper 100 via the main air outlet part 131, and then flows to the top plate 203, and then flows downward from the top plate 203 to the gap between the lower part of the water heater shell 200 and the fan 20, the heat exchanger 30, the surrounding frame 50 and the combustion device 40, so as to cool the lower part of the fan 20, the heat exchanger 30, the surrounding frame 50 and the combustion device 40. Then, the gas (i.e. air) mixes with the gas in the combustion chamber and burns to form high-temperature flue gas, which flows to the heat exchanger 30 and exchanges heat with the water flowing in the heat exchanger 30, and then is discharged out of the burner shell 200 by the fan 20. In addition, by arranging the main air outlet part 131 of the sound damper 100 opposite to the top plate 203 and having a gap therebetween, the operating noise in the water heater shell 200 is transmitted to the top plate 203 and is reflected by the top plate 203 before being transmitted into the air outlet part 103 of the sound damper 100, which not only reduces the amount of noise transmitted into the air outlet part 103, but also reduces the intensity of the noise transmitted into the air outlet part 103, and further reduces the noise transmitted from the air inlet part 102 of the sound damper 100 and the air inlet 201 on the water heater shell 200 to the outside, so as to further improve the noise reduction effect of the sound damper 100.

[0105] In some embodiments of the present application, the fan 20 can include a volute 21 arranged in sequence along the transverse direction, and a motor 22 connected to the volute 21. As shown in the drawings, Figure 10 As shown, there is a gap space between the volute 21 and the motor 22, and the air flowing out of the air outlet part 103 of the sound damper 100 can flow to the gap space. The air flowing out of the air outlet part 103 of the sound damper 100 flows to the top plate 203 and is reflected by the top plate 203, part of the gas can flow to the gap between the sound damper 100 and the motor 22, and the other part of the gas can flow to the gap space between the volute 21 and the motor 22, so as to cool the front and back of the motor 22, without the need to arrange an additional fan between the motor 22 and the volute 21 to cool the motor 22, which can reduce noise and save energy.

[0106] As shown in the drawings, Figure 9 In some embodiments of the present application, the secondary air outlet part 132 of the sound damper 100 can be arranged opposite to the motor 22. By arranging the secondary air outlet part 132 opposite to the motor 22, the gas flowing out of the secondary air outlet part 132 can flow to the motor 22, so as to directionally cool the motor 22, which can further improve the cooling effect of the motor 22.

[0107] In some embodiments of the present disclosure, the top plate 203 of the water heater housing 200 can be provided with a smoke exhaust port, which is in communication with the outlet of the fan 20. As shown in Figure 9 and Figure 10 The gas water heater 1 can further include a wind shield 60 covering the smoke exhaust port. The wind shield 60 can include a first tube body 61, a second tube body 62 and a third tube body 63 arranged in sequence from bottom to top. The size of the first tube body 61 is larger than that of the third tube body 63, and the second tube body 62 is used to connect the first tube body 61 and the third tube body 63. By setting the wind shield 60 into a variable diameter structure with narrow top and wide bottom, the noise emitted through the wind shield 60 can be reduced.

[0108] As shown in Figure 9 and Figure 10 In some embodiments of the present disclosure, the gas water heater 1 can further include a first baffle, a second baffle, a first heat insulation cotton and a second heat insulation cotton (not shown in the figure). The first baffle, the second baffle, the first heat insulation cotton and the second heat insulation cotton are arranged in the frame 50. The first baffle and the back plate of the frame 50 form a first air cooling channel. The back plate can be provided with a first air cooling hole, through which the gas can flow into the first air cooling channel and then flow from the first air cooling channel to the heat exchanger 30. The second baffle and the front plate of the frame 50 form a second air cooling channel. The front plate can be provided with a second air cooling hole, through which the gas can flow into the second air cooling channel and then flow from the second air cooling channel to the heat exchanger 30. The first heat insulation cotton is connected with the first side plate of the frame 50. The second heat insulation cotton is connected with the second side plate of the frame 50. Compared with air cooling arranged in front, back, left and right, in the present embodiment, by arranging front and back air cooling and left and right heat insulation cotton, the air cooling amount can be reduced to reduce the rotating speed of the fan 20, and noise reduction and temperature reduction can be realized.

[0109] Each of the embodiments in the present disclosure is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other. Each embodiment mainly describes the difference from other embodiments. For specific description, reference can be made to the description of the related processing and related embodiments described above, which will not be repeated here.

[0110] It should be understood that the above description is for illustration only and is not intended to be limiting. Many implementations and many applications other than the examples provided would be apparent to those of ordinary skill in the art from this description. The scope of the present disclosure should not be determined with reference to the above description, but instead should be determined with reference to the appended claims along with their full scope of equivalents.

[0111] The above merely provides preferred embodiments of the present specification but are not intended to limit the present specification. The present specification can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification shall be included in the protection scope of the present specification.

Claims

1. A muffler for a gas water heater, the muffler comprising: a folded pipe having a first end portion, a second end portion, and a side wall between the first end portion and the second end portion; an air inlet portion and an air outlet portion provided on the folded pipe, the air inlet portion being provided on the first end portion and at least a portion of the air outlet portion being provided on the second end portion, the air inlet portion being in communication with an air inlet on a housing of the gas water heater, gas being able to flow from the air inlet portion into the folded pipe and out of the folded pipe via the air outlet portion; and a folded muffling structure formed by a portion of the side wall being inwardly recessed.

2. The muffler for a gas water heater according to claim 1, wherein: along a direction of gas flow, a cross-sectional area of the folded pipe gradually decreases and then gradually increases.

3. The muffler for a gas water heater according to claim 1, wherein: an opening area of the air outlet portion is smaller than an opening area of the air inlet portion.

4. The muffler for a gas water heater according to claim 1, wherein: a plane on which the first end portion is located intersects a plane on which the second end portion is located; and / or, an opening direction of the air outlet portion is perpendicular to or forms an acute angle with an opening direction of the air inlet portion; and / or, a projection of the folded muffling structure on the first end portion at least partially overlaps the air inlet portion; and / or, a projection of the folded muffling structure on the second end portion at least partially overlaps the air outlet portion.

5. The muffler for a gas water heater according to claim 1, wherein: the air outlet portion comprises a primary air outlet portion and a secondary air outlet portion; the primary air outlet portion is provided on the second end portion; and the secondary air outlet portion is provided on a portion of the side wall other than the portion of the side wall that is inwardly recessed.

6. The muffler for a gas water heater according to claim 5, wherein: a gas flow resistance of the secondary air outlet portion is greater than a gas flow resistance of the primary air outlet portion.

7. The muffler for a gas water heater according to claim 5, wherein: an opening area of the secondary air outlet portion is smaller than an opening area of the primary air outlet portion.

8. The muffler for a gas water heater according to claim 7, wherein: the primary air outlet portion comprises one or more first air outlet holes; the secondary air outlet portion comprises one or more second air outlet holes; and an opening area of the first air outlet holes is greater than an opening area of the second air outlet holes.

9. The muffler for a gas water heater according to claim 5, wherein: an opening direction of the primary air outlet portion is perpendicular to an opening direction of the secondary air outlet portion; and / or, the secondary air outlet portion is provided on the side wall proximate to the second end portion.

10. The muffler for a gas water heater according to claim 1, wherein: the muffler is made using a blow molding process. including: the muffler according to any one of claims 1 to 10; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 11. An air intake structure characterized by comprising: ​ ​ The water heater shell is provided with an air inlet, and the silencer is arranged in the water heater shell and mounted on the inner wall of the water heater shell, and the air inlet part of the silencer is communicated with the air inlet.

12. The air inlet structure according to claim 11, wherein, The water heater shell comprises a frame, a top plate and a cover plate, the frame comprises a first vertical plate, a back plate and a second vertical plate connected in sequence, the cover plate is arranged opposite to the back plate, and the top plate is connected with the upper sides of the first vertical plate, the second vertical plate and the back plate; The air inlet is arranged on the upper portion of the back plate.

13. The air inlet structure according to claim 12, wherein, The air inlet comprises a plurality of air inlet holes arranged on the upper portion of the back plate.

14. The air inlet structure according to claim 12, wherein, The silencer is connected with the back plate and / or the first vertical plate; or The silencer is connected with the back plate and / or the second vertical plate.

15. The air inlet structure according to claim 12, wherein, The main air outlet part of the silencer is arranged opposite to the top plate, and a gap exists between the main air outlet part and the top plate.

16. A gas water heater, characterized by, The air inlet structure according to any one of claims 11 to 15; The fan is arranged in the water heater shell of the air inlet structure and close to the top plate of the water heater shell. The air inlet part of the silencer of the air inlet structure is communicated with the air inlet on the water heater shell, the main air outlet part of the silencer is arranged opposite to the top plate, and a gap exists between the main air outlet part and the top plate; 17. The gas water heater of claim 16, wherein, When the fan is running, part of the gas flowing into the silencer from the air inlet via the air inlet part flows out of the silencer via the main air outlet part, then flows to the top plate, and then flows downward from the top plate to the gap between the water heater shell and the lower portion of the fan, the heat exchanger, the surrounding frame and / or the combustion device of the gas water heater; part of the surrounding frame between the heat exchanger and the combustion device forms a combustion chamber. The fan comprises a volute arranged in sequence along the transverse direction and a motor connected with the volute; a gap space exists between the volute and the motor, and the air flowing out of the air outlet part of the silencer in the air inlet structure can flow to the gap space.

18. The gas water heater of claim 16, wherein, The secondary air outlet part of the silencer is arranged opposite to the motor.

19. The gas water heater of claim 18, wherein, Further comprising:

20. The gas water heater of claim 17, wherein, A first baffle, which forms a first air cooling channel with the back plate of the surrounding frame; a first air cooling hole is arranged on the back plate, and the gas can flow into the first air cooling channel from the first air cooling hole and then flow to the heat exchanger from the first air cooling channel; A second baffle, which forms a second air cooling channel with the front plate of the surrounding frame; a second air cooling hole is arranged on the front plate, and the gas can flow into the second air cooling channel from the second air cooling hole and then flow to the heat exchanger from the second air cooling channel; A first heat insulation cotton, which is connected with the first side plate of the surrounding frame; A second heat insulation cotton, which is connected with the second side plate of the surrounding frame. ​

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