CN117006694A

CN117006694A - gas water heater

Info

Publication number: CN117006694A
Application number: CN202210457893.7A
Authority: CN
Inventors: 崔福浩; 唐伟鹏; 马志浩
Original assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2023-11-07

Abstract

The invention relates to the technical field of household appliances, and provides a gas water heater, which comprises: a bottom case; the burner is arranged on the front surface of the bottom shell; the rear cover plate is arranged on the back surface of the bottom shell, and defines an air inlet with the bottom shell, the rear cover plate is provided with a first air inlet communicated with the air inlet, the bottom shell is provided with a second air inlet at a position deviating from the first air inlet, and the second air inlet is communicated with the air inlet and the air inlet of the combustor; the front cover plate is arranged on the front surface of the bottom shell, and the burner is positioned between the front cover plate and the bottom shell. According to the gas water heater, through the structure of the bottom shell and the rear cover plate, the bottom shell and the rear cover plate can weaken internal noise, the sound insulation effect is enhanced, a longer and wider air inlet channel is formed by utilizing the cavity between the bottom shell and the rear cover plate, the path length of the noise outwards propagating along the air inlet channel can be greatly increased, the transmission loss of the noise outwards propagating is effectively improved, and the flow channel resistance is greatly reduced.

Description

Gas water heater

Technical Field

The invention relates to the technical field of household appliances, in particular to a gas water heater.

Background

The gas water heater is the most convenient and economic device for quickly heating water at present, the energy conversion efficiency of the gas water heater exceeds 90 percent, and compared with an electric water heater, the gas water heater is more energy-saving and meets the requirement of double carbon. However, when the gas water heater works normally, larger noise is generated, and bad experience is brought to people who move nearby the water heater.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the gas water heater with good sound insulation effect.

According to an embodiment of the first aspect of the invention, a gas water heater comprises:

a bottom case;

the burner is arranged on the front surface of the bottom shell;

the rear cover plate is arranged on the back surface of the bottom shell and defines an air inlet with the bottom shell, the rear cover plate is provided with a first air inlet communicated with the air inlet, the bottom shell is provided with a second air inlet at a position deviating from the first air inlet, and the second air inlet is communicated with the air inlet of the burner and the air inlet;

the front cover plate is arranged on the front surface of the bottom shell, and the burner is positioned between the front cover plate and the bottom shell.

According to the gas water heater provided by the embodiment of the invention, through the structure of the bottom shell and the rear cover plate which are matched, the bottom shell and the rear cover plate can weaken internal noise, the sound insulation effect is enhanced, a longer and wider air inlet channel is formed by utilizing the cavity between the bottom shell and the rear cover plate, the path length of the noise outwards propagating along the air inlet channel can be greatly increased, the transmission loss of the noise outwards propagating is effectively improved, the air inlet noise can be basically eliminated, and the flow channel resistance is greatly reduced.

According to one embodiment of the invention, the inner side of the front cover plate is provided with a silencing component.

According to one embodiment of the invention, the silencing component is provided with a silencing cavity, and a silencing hole is formed in the wall surface, facing the bottom shell, of the silencing cavity.

According to one embodiment of the invention, the plurality of silencing cavities are arranged in an array, and each silencing cavity is correspondingly provided with a plurality of silencing holes arranged in an array.

According to an embodiment of the present invention, at least one of the volume of at least two of the sound deadening chambers, the flow cross-sectional area of the sound deadening holes corresponding to at least two of the sound deadening chambers, and the density of the sound deadening holes corresponding to at least two of the sound deadening chambers is different.

According to one embodiment of the present invention, further comprising: the heat exchanger and the fan system are both arranged on the bottom shell;

the volume of the sound deadening chambers towards the burner and the heat exchanger is larger than the volume of the sound deadening chambers towards the fan system, and/or the number of the sound deadening holes corresponding to the sound deadening chambers towards the burner and the heat exchanger is smaller than the number of the sound deadening holes corresponding to the sound deadening chambers towards the fan system.

By designing the volume of the sound deadening chamber towards the burner and the heat exchanger to be larger, low frequency noise can be better absorbed; by designing the number of sound deadening holes corresponding to the sound deadening chamber toward the fan system more, high frequency noise can be better absorbed.

According to one embodiment of the invention, the silencing element comprises a plurality of baffles.

According to one embodiment of the invention, the second air inlet is arranged at a position of the bottom shell far away from the air inlet of the burner.

According to one embodiment of the invention, the second air inlet is arranged at a position of the bottom shell close to the air inlet of the burner.

According to one embodiment of the invention, the second air inlet comprises a first through hole group and a second through hole group, wherein the first through hole group is arranged at a position close to the primary air inlet of the burner, and the second through hole group is arranged at a position close to the secondary air inlet of the burner.

Through the first through hole group and the second through hole group that are used for admitting air for primary air inlet and secondary air inlet independent design, can improve the flow ratio that once admits air and secondary admitted air, help the combustor to obtain better combustion effect, reduce harmful gas content such as CO in the flue gas.

According to one embodiment of the present invention, the cross-sectional flow area of the first through hole set is A1, and the cross-sectional flow area of the second through hole set is A2, which satisfies the following conditions: A1/A2 is more than or equal to 1 and less than or equal to 2.

The first through hole group is designed to have larger flow cross section area, so that the ratio of primary air intake can be increased, and the emission of harmful gases such as CO, NO and the like can be reduced

According to one embodiment of the invention, the bottom shell comprises a back plate, a top plate which is connected with the upper end of the back plate and is bent forwards, and a bottom plate which is connected with the lower end of the back plate and is bent forwards, the back cover plate is arranged on the back surface of the back plate, and the burner is arranged on the front surface of the back plate;

the front cover plate comprises a panel, and a left side plate and a right side plate which are connected with the panel.

The above technical solutions in the embodiments of the present invention have at least one of the following technical effects:

through setting up drain pan and back shroud complex structure, drain pan and back shroud all can play the effect of weakening to inside noise, have strengthened the sound insulation effect, and utilize the cavity between drain pan and the back shroud to form longer broad intake duct, can increase substantially the outward propagation's of noise along the intake duct path length, effectively improve the outward propagation's of noise transmission loss, can eliminate the noise of intaking basically, reduce runner resistance by a wide margin.

Further, by designing the volume of the sound deadening chamber toward the burner and the heat exchanger to be larger, low-frequency noise can be better absorbed; by designing the number of sound deadening holes corresponding to the sound deadening chamber toward the fan system more, high frequency noise can be better absorbed.

Furthermore, the first through hole group and the second through hole group for air intake are independently designed for the primary air inlet and the secondary air inlet, so that the flow ratio of primary air intake to secondary air intake can be improved, the burner is helped to obtain better combustion effect, and the content of harmful gases such as CO in flue gas is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is one of the explosion diagrams of a gas water heater provided by an embodiment of the invention;

FIG. 2 is a second exploded view of the gas water heater according to the embodiment of the present invention;

FIG. 3 is a schematic diagram of an intake flow direction of a gas water heater according to an embodiment of the present invention;

FIG. 4 is a second schematic diagram of an intake flow direction of a gas water heater according to an embodiment of the present invention;

FIG. 5 is a third exploded view of a gas water heater according to an embodiment of the present invention;

FIG. 6 is a schematic view of a part of the structure of a gas water heater according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a muffler component of a gas water heater according to an embodiment of the present invention;

FIG. 8 is a second schematic structural view of a muffler component of a gas water heater according to an embodiment of the present invention;

FIG. 9 is an exploded view of a part of the structure of a gas water heater provided by an embodiment of the present invention;

FIG. 10 is a third schematic view of a muffler component of a gas water heater according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a muffler component of a gas water heater according to an embodiment of the present invention;

FIG. 12 is a schematic diagram showing a structure of a muffler component of a gas water heater according to an embodiment of the present invention;

FIG. 13 is a schematic diagram showing a structure of a muffler component of a gas water heater according to an embodiment of the present invention.

Reference numerals:

a bottom case 100, a second air inlet 120;

burner 140, heat exchanger 150, fan system 160, smoke tube 161, sealing ring 172;

muffler component 200, base 210, muffler chamber 220, first region 221, second region 222, muffler hole 230, baffle 240, and support plate 250;

a rear cover plate 410, a first air inlet 411;

front cover 420, panel 421, left side panel 422, right side panel 423.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.

In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are 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.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

A gas water heater according to an embodiment of the present invention will be described with reference to fig. 1 to 13.

As shown in fig. 1 and 2, the gas water heater according to the embodiment of the present invention includes: the bottom case 100, the burner 140, the rear cover plate 410, and the front cover plate 420.

The bottom case 100 is used to support main functional components of the gas water heater, and the main functional components of the gas water heater may be mounted on the front surface of the bottom case 100, the front surface of the bottom case 100 being referred to as the front surface side.

The bottom case 100 may be a shell structure, and in some embodiments, the bottom case 100 may be a unitary structure to minimize voids between the bottom case 100 and a rear mounting wall, or the bottom case 100 may be a unitary, non-porous structure. Therefore, the radiation noise on the back of the gas water heater can be reduced, and the reflection of the back noise on the installation wall body is weakened.

As shown in fig. 1 to 5, the bottom chassis 100 may include a back plate, a top plate and a bottom plate, the back plate is positioned at a rear end of the bottom chassis 100, the top plate is connected to an upper end of the back plate and is bent forward, the bottom plate is connected to a lower end of the back plate and is bent forward. The back plate, the top plate and the bottom plate can be of an integrated structure. Thus, there is no void between the plates, and the noise transmitted backward can be reduced.

The bottom shell 100 can be of a metal shell type structure, so that the bottom shell 100 is high in strength and good in fireproof performance; or the bottom case 100 may have a plastic case type structure, so that the bottom case 100 has a light weight and is easy to mold, and a flame retardant may be added to the plastic bottom case 100 to enhance the fireproof performance.

The burner 140 is mounted on the front surface (front surface) of the bottom case 100, and the burner 140 may be mounted on the bottom case 100 by a screw connection structure or a mounting structure such as a buckle. As shown in fig. 2-5, the burner 140 may be mounted to the front (front) surface of the back plate.

As shown in fig. 2 to 5, the gas water heater may further include a heat exchanger 150, the heat exchanger 150 being installed at the bottom case 100, the heat exchanger 150 being in communication with a combustion chamber of the burner 140, an oxidant (air) entering the burner 140 from an air inlet of the burner 140, being mixed with the gas and being combusted in the combustion chamber, and water to be heated and high temperature air being heat exchanged at the heat exchanger 150. The heat exchanger 150 may be located at an upper end of the burner 140. As shown in fig. 2-5, the heat exchanger 150 may be mounted to the front (front) surface of the back plate.

The gas water heater may be of natural air intake type or forced air exhaust type, and for forced air exhaust type, the gas water heater may further comprise a fan system 160, where the fan system 160 may be installed at the upper end of the heat exchanger 150 as shown in fig. 2-5. As shown in fig. 2-5, the heat exchanger 150 may be mounted to the front (front) surface of the back plate.

As shown in fig. 1 to 4, a rear cover 410 is mounted to the rear surface of the bottom chassis 100. The back plate 410 may be mounted to the back of the back plate.

The burner 140, the bottom case 100, and the rear cover 410 are sequentially arranged in the front-rear direction. The newly added back cover plate 410 has substantially no influence on the installation structure of the original burner 140 and the bottom case 100.

The functional parts, the bottom chassis 100, and the rear cover 410 are sequentially arranged in the front-rear direction. The newly added back cover plate 410 has substantially no influence on the installation structure of the original burner 140 and the bottom case 100. The functional components include a combustor 140, a heat exchanger 150, and a fan system 160.

Thus, the operation noise of the gas water heater needs to pass through at least the bottom case 100 and the rear cover 410 when it is transmitted backward, and the second cover and the first cover reflect most of the operation noise directly transmitted outward, and the second cover and the first cover block the direct path of the noise.

The back cover 410 and the bottom case 100 define an air intake channel, and a main plate body of the back cover 410 is spaced apart from a back plate of the bottom case 100 to form the air intake channel.

The rear cover plate 410 is provided with a first air inlet 411, the first air inlet 411 is communicated with the air inlet channel, and the first air inlet 411 can be a through hole formed in the rear cover plate 410 and penetrates through the rear cover plate 410.

As shown in fig. 1-4, the first air inlet 411 may include a plurality of through holes formed on the first cover plate, and the through holes may have various shapes, including but not limited to: elongated, parallelogram, triangle, circle, other polygon, etc.

The plurality of through holes of the first air inlet 411 may be symmetrically arranged along the central axis of the air inlet, so that air is introduced uniformly, and the smoothness of the air flow in the air inlet may be improved. For example, in the embodiment shown in fig. 1-4, the first air inlet 411 includes three elongated through holes in the middle and a plurality of elongated through holes mirror-image distributed on both sides of the three elongated through holes.

As shown in fig. 1, 3 and 4, the bottom case 100 is provided with a second air inlet 120, and the second air inlet 120 communicates with an air inlet and an air inlet channel of the burner 140. The second air inlet 120 is located at a position of the bottom case 100 away from the first air inlet 411.

For example, as shown in fig. 1 to 3, in the case that the first air inlet 411 is located at the lower portion of the rear cover 410, the second air inlet 120 is located at the upper portion of the bottom chassis 100; correspondingly, if the burner 140 is installed at the lower portion of the bottom case 100, the intake passage is a long passage as indicated by an arrow.

As shown in fig. 4, in a case where the first air inlet 411 is located at an upper portion of the rear cover 410, the second air inlet 120 is provided at a lower portion of the bottom chassis 100. Thus, the length of the air inlet channel is long enough, and the distance between the second air inlet 120 and the air inlet of the burner 140 is short, so that the air inlet resistance is small.

The main function of the inlet duct is to introduce ambient air into the burner 140, but the operating noise of the gas water heater is also transmitted outwards through the inlet duct. According to the gas water heater provided by the embodiment of the invention, through the matched structural design of the bottom shell 100 and the rear cover plate 410, the path length of the noise outwards transmitted along the air inlet channel can be greatly increased by more than 500%, and the transmission loss of the noise outwards transmitted is effectively improved.

In the related art, some structures are designed to prolong the air inlet channel, but the air inlet channel is of a pipeline structure, so that on one hand, the length is limited to be increased due to the limitation of the whole volume of the gas water heater, and on the other hand, the prolonged air inlet channel is small in flow cross section area, so that air inlet noise can be generated.

According to the gas water heater provided by the embodiment of the invention, through the structural design of the bottom shell 100 and the rear cover plate 410, the air inlet channel is formed between the bottom shell 100 and the rear cover plate 410, the width of the air inlet channel is equivalent to the width of the whole machine, the flow cross section area of the air inlet channel can be increased, the air inlet channel is linear, the flow channel resistance is small, the cross section area difference is small, the flow field in the flow channel flows uniformly, the air inlet flow velocity gradient is small, the generated turbulence noise is small, the air inlet noise can be basically eliminated, the air inlet pressure is basically free from loss, and the combustion efficiency of the burner 140 is not influenced.

The front cover 420 is mounted to the front surface of the bottom case 100, and the burner 140 is located between the front cover 420 and the bottom case 100. The front cover 420 serves to reflect the forward-traveling noise.

The front cover 420 may be a shell-type structure, and in some embodiments, the front cover 420 may be a unitary structure to minimize voids in the front cover 420, or the front cover 420 may be a unitary, non-porous structure. Thus, the radiation noise of the front part of the gas water heater can be reduced.

As shown in fig. 5, the front cover 420 includes a panel 421, and left and right side plates 422 and 423 connected to the panel 421. The panel 421, the left side plate 422, and the right side plate 423 are formed as a unitary structure. Thus, there is no void between the plates, and the noise transmitted backward can be reduced.

The rear cover plate 410 and the front cover plate 420 may have a sheet metal structure, so that the fireproof performance and the protective performance of the rear cover plate 410 and the front cover plate 420 are both strong; alternatively, the rear cover plate 410 and the front cover plate 420 may have a plastic shell type structure, so that the rear cover plate 410 and the front cover plate 420 have a light weight and are easy to be formed, and a flame retardant may be added to the plastic rear cover plate 410 and the plastic front cover plate 420 to enhance the fire resistance.

According to the gas water heater provided by the embodiment of the invention, through the structure of matching the bottom shell 100 and the rear cover plate 410, the bottom shell 100 and the rear cover plate 410 can play a role in weakening internal noise, the sound insulation effect is enhanced, a longer and wider air inlet channel is formed by utilizing the cavity between the bottom shell 100 and the rear cover plate 410, the path length of the noise which is transmitted outwards along the air inlet channel can be greatly increased, the transmission loss of the noise which is transmitted outwards is effectively improved, the air inlet noise can be basically eliminated, and the flow channel resistance is greatly reduced.

In some embodiments, the cross-sectional flow area of the first air inlet 411 is P1, and the cross-sectional flow area of the second air inlet 120 is P2, which satisfies the following: P2/P1 is less than or equal to 1.5 and less than or equal to 3.

It can be appreciated that the second air inlet 120 disposed inside is designed to have a larger flow cross-sectional area than the first air inlet 411 disposed outside, so that the flow resistance caused by the air inlet can be eliminated, the turbulence noise in the air inlet can be further reduced, and the acoustic whistle at the second air inlet 120 can be prevented. For example, in some embodiments, p2/p1=2, or p2/p1=2.5.

In practical design, the cross-sectional area of the first air inlet 411 can be adjusted according to the maximum load of the gas water heater, and the greater the maximum load of the gas water heaterThe larger the cross-sectional area of the first air inlet 411 is, the more the fuel gas in the burner 140 can be combusted. The maximum load of the gas water heater can be 25kW, 30kW or 34kW, etc., and the flow cross section area P1 of the first air inlet 411 can be 2000mm ² ～3500mm ² Between, say p1=2500 mm ² 。

In some embodiments, the second air inlet 120 is disposed at a position of the bottom case 100 away from the air inlet of the burner 140.

As shown in fig. 3, the burner 140 is mounted at the lower part of the bottom case 100, the second air inlet 120 is disposed at the upper part of the bottom case 100, and the first air inlet 411 is disposed at the lower part of the rear cover 410; the air basically passes through the upper long-straight channel and the lower long-straight channel in the gas water heater, so that the transmission loss of the outward transmission of noise can be effectively improved.

In other embodiments, the second air inlet 120 is disposed at a position of the bottom case 100 near the air inlet of the burner 140.

As shown in fig. 4, the burner 140 is mounted at the lower portion of the bottom case 100, the second air inlet 120 is disposed at the lower portion of the bottom case 100, and the first air inlet 411 is disposed at the upper portion of the rear cover 410; the air basically passes through the long straight channel in the gas water heater, so that the transmission loss of the outward transmission of noise can be effectively improved, the distance between the second air inlet 120 and the air inlet of the burner 140 is short, and the air inlet resistance is small.

In the case where the second air inlet 120 is provided at a position of the bottom case 100 near the air inlet of the burner 140, the second air inlet 120 includes a first through hole group provided at a position near the primary air inlet of the burner 140 and a second through hole group provided at a position near the secondary air inlet of the burner 140.

It can be appreciated that the burner 140 includes a primary air inlet and a secondary air inlet, the primary air inlet is communicated with a gas inlet channel of the burner 140, air is sucked by means of negative pressure generated by high-speed passing gas, the secondary air inlet directly introduces air, and the flow ratio of the primary air inlet to the secondary air inlet can be improved by independently designing a first through hole group and a second through hole group for air inlet for the primary air inlet and the secondary air inlet, so that the burner 140 can obtain better combustion effect, and the content of harmful gases such as CO in flue gas is reduced.

For example, the primary air inlet of the burner 140 is on the right side and the secondary air inlet is on the bottom, correspondingly, the first set of through holes is on the right side, the second set of ventilation is on the left side, and the length of the first set of ventilation is longer, extending more upward, to fit the primary air inlet.

The shapes of the through holes in the first through hole group and the second through hole group can be various, for example, the first through hole group and the second through hole group can respectively comprise a plurality of strip-shaped through holes, and the length of each through hole in the first through hole group is longer than that of each through hole in the second through hole group; alternatively, the first and second sets of through holes may each include a plurality of circular through holes, each through hole in the first set of through holes having a larger radius than each through hole in the second set of through holes.

Of course, the first and second sets of through holes may also be designed in other shapes, such as polygonal shapes, etc.

In some embodiments, the cross-sectional flow area of the first set of through holes is A1 and the cross-sectional flow area of the second set of through holes is A2, satisfying: A1/A2 is more than or equal to 1 and less than or equal to 2. By designing the flow cross-sectional area of the first through hole group to be larger, the ratio of primary air intake can be increased, so that the emission of harmful gases such as CO, NO and the like can be reduced, and in actual design, the value of A1/A2, such as A1/A2 = 1.5, A1/A2 = 1.8 and the like, can be adjusted according to specific combustion conditions.

As shown in fig. 1 and 2, the gas water heater may further include a sealing ring 172, the smoke tube 161 of the fan system 160 penetrates through the top plate of the bottom shell 100, the sealing ring 172 is sleeved outside the smoke tube 161, and the sealing ring 172 is clamped between the smoke tube 161 and the top plate of the bottom shell 100, so that a gap between the smoke tube 161 and the bottom shell 100 can be blocked, and a path for directly transmitting noise outwards at the gap is broken.

The sealing ring 172 can comprise two subsections with different outer diameters, so that a stepped surface is formed outside the sealing ring 172, when the sealing ring is installed, the subsection with the shorter outer diameter extends into the through hole of the bottom shell 100, the stepped surface is stopped against the top plate of the bottom shell 100, a sealing structure with a plurality of combined surfaces can be formed, and the sound insulation effect is better.

The sealing ring 172 may be made of silica gel, and the sealing ring 172 made of silica gel is high temperature resistant, so that the aging time of the sealing ring 172 in the high temperature environment of the smoke tube 161 can be prolonged.

The gas water heater according to the embodiment of the present invention may further include other silencing members 200, and as shown in fig. 6, the silencing members 200 may be installed inside the front cover 420, i.e., on the rear surface of the front cover 420.

The front cover plate 420 itself can reflect most of working noise directly transmitted outwards, and is combined with the silencing component 200 arranged on the inner side of the front cover plate 420, most of noise is absorbed by the silencing component 200, and the rest of noise is reflected by the front cover plate 420 again, so that the silencing effect is better.

The silencer component 200 may be mounted to the front cover plate 420 in a variety of ways, including by adhesive, snap fit, threaded connection, or the like.

The silencer component 200 can have a variety of configurations, and embodiments of the present invention are described below in detail from four different configurations.

1. The noise attenuation member 200 is sound absorbing cotton

In this embodiment, sound absorbing cotton is provided inside the front cover 420, and the sound absorbing cotton may be adhered inside the front cover 420.

The sound absorbing cotton may include a plurality of regions having different parameters including at least one of a volume weight and a thickness, which are distributed in a direction perpendicular to the front-rear direction. Therefore, the sound absorption effects of different areas are different, and parameters of different areas of the sound absorption cotton can be designed according to different noise characteristics of each part of the gas water heater.

The silencer component 200 includes a plurality of regions, which correspond to different positions of the bottom chassis 100 in the front-rear direction, respectively, and the silencer component 200 has different sound absorption parameters in at least two regions.

The inventor finds that the noise sources of the normal operation of the gas water heater include: combustion noise, fan noise, gas injection noise, mechanical vibration noise, water flow noise, etc. The combustion noise has obvious low-frequency characteristics, the penetrability is strong, the fan and the water pump noise have obvious high-frequency characteristics, and the noise is sharp and harsher and poor in hearing feeling.

By providing a plurality of areas with different sound absorption parameters, various noises can be eliminated in a targeted manner.

For example, the sound absorbing cotton may include a first region facing the burner 140 and the heat exchanger 150, and a second region, preferably, the first region facing the combustion chamber of the burner 140 and the heat exchanger 150; the second region is directed toward fan system 160, where A-directed B means that the projections of A and B in the front-to-back direction substantially coincide.

The first region has a volume weight greater than the second region, or the first region has a thickness greater than the second region.

2. The silencing component 200 is a porous silencing cavity structure

In this embodiment, the muffler member 200 has a muffler chamber 220, and a wall surface of the muffler chamber 220 facing the bottom chassis 100 is provided with a muffler hole 230.

As shown in fig. 7 to 8, the silencer component 200 includes a base 210, and the base 210 may be made of plastic, metal, ceramic, or other materials.

The base 210 is provided with a silencing cavity 220, the silencing cavity 220 can be cuboid, spherical or other shapes, and the area of the base 210 where the silencing cavity 220 is not provided can be of a thin-wall structure so as to reduce the weight of the silencing component 200.

The surface (rear surface) of the base 210 facing the bottom chassis 100 is provided with a sound deadening hole 230, and the sound deadening hole 230 communicates to the sound deadening chamber 220.

When the gas water heater works, most of noise can be transmitted to the silencing cavity 220 through the silencing hole 230, the noise can be absorbed through multiple reflections in the silencing cavity 220, and a small amount of noise can be reflected by the front cover plate 420, so that the overall silencing effect is better.

As shown in fig. 8, the plurality of silencing cavities 220 are plural, and the plurality of silencing cavities 220 are arranged in an array, and each silencing cavity 220 corresponds to a plurality of silencing holes 230 arranged in an array.

In this way, noise of each region can be absorbed through the sound deadening holes 230 and the sound deadening chamber 220.

In some embodiments, at least one of the volume of at least two sound-deadening chambers 220, the flow cross-sectional area of sound-deadening holes 230 corresponding to at least two sound-deadening chambers 220, and the density of sound-deadening holes 230 corresponding to at least two sound-deadening chambers 220 is different.

In other words, there are at least one of the following three parameters of the at least two sound deadening chambers 220 that differ: the volume of the silencing cavity 220, the flow cross-sectional area of the silencing hole 230, and the density of the silencing hole 230 corresponding to the silencing cavity 220 can pertinently silencing the combustion noise, the water flow noise and the flow-induced noise of the gas water heater according to different frequency characteristics.

In some embodiments, as shown in fig. 9, the volume of sound deadening chamber 220 towards combustor 140 and heat exchanger 150 is greater than the volume of sound deadening chamber 220 towards fan system 160.

By designing the volume of the sound deadening chamber 220 toward the burner 140 and the heat exchanger 150 to be larger, low frequency noise can be better absorbed.

In some embodiments, the number of sound deadening holes 230 corresponding to sound deadening cavities 220 towards combustor 140 and heat exchanger 150 is less than the number of sound deadening holes 230 corresponding to sound deadening cavities 220 towards fan system 160. By designing the number of sound deadening holes 230 corresponding to the sound deadening chamber 220 toward the blower system 160 to be larger, high frequency noise can be better absorbed.

In one embodiment, as shown in fig. 9, the substrate 210 may include a first region 221 and a second region 222, the first region 221 facing the burner 140 and the heat exchanger 150, preferably the first region 221 facing the combustion chamber of the burner 140 and the heat exchanger 150; the second region 222 is directed toward the fan system 160, where the A-direction B refers to the projection of A and B in the front-to-back direction substantially coinciding.

The volume of the silencing cavities 220 corresponding to the first area 221 is V1, the aperture of the silencing holes 230 corresponding to the first area 221 is D1, and the number of the silencing holes 230 corresponding to each silencing cavity 220 corresponding to the first area 221 is N1, so that the following conditions are satisfied: 60mm ³ ≤V1≤455mm ³ D1 is more than or equal to 0.6mm and less than or equal to 2mm, N1 is more than or equal to 50 and less than or equal to 75; such as v1=200 mm ³ D1=1 mm, n1=66. This form of first region 221 may better absorb noise at a frequency of about 300 Hz.

The volume of the silencing cavities 220 corresponding to the second areas 222 is V2, the aperture of the silencing holes 230 corresponding to the second areas 222 is D2, and the number of the silencing holes 230 corresponding to each silencing cavity 220 corresponding to the second areas 222 is N2, so that the following conditions are satisfied: 10mm of ³ ≤V2≤80mm ³ D2 is more than or equal to 0.6mm and less than or equal to 2mm, N2 is more than or equal to 76 and less than or equal to 120; such as v1=50 mm ³ D1=1.2 mm, n1=99. This form of the second region 222 may better absorb noise at frequencies between about 600Hz and about 800 Hz.

3. The silencing member 200 is a labyrinth silencer

In this embodiment, as shown in fig. 10-13, the silencer component 200 includes a plurality of baffles 240.

The labyrinth structure can be formed among the plurality of baffles 240, so that the noise is reflected for multiple times in the labyrinth flow channel, the energy of the noise is consumed, the purpose of reducing the noise is achieved, and the noise which is transmitted outwards through the air inlet channel can be greatly weakened.

The normal line of at least a portion of the regions of the baffles 240 is spaced apart from the plurality of baffles 240 by less than 30 ° from the up-down direction. Therefore, most of noise can be reflected for many times, the energy of the noise is consumed, and the purpose of reducing the noise is achieved.

As shown in fig. 10-12, the baffle 240 may be curved, and the baffle 240 is curved in a direction away from the second air intake 120. In this way, the noise reflected by the baffle 240 is substantially far away from the second air inlet 120, and more reflections are required to enter the air inlet through the second air inlet 120, so as to reduce the energy of the noise entering the air inlet.

As shown in fig. 10-12, the number and distribution of baffles 240 may take a variety of forms. As shown in fig. 10, the baffles 240 are short in length, large in number, and symmetrically arranged on the left and right sides; as shown in fig. 11, the baffles 240 are long in length, small in number, and symmetrically arranged on the left and right sides; as shown in fig. 12, the baffles 240 are long in length, small in number, and asymmetrically arranged.

Of course, the baffle 240 may be flat plate-shaped, as shown in fig. 13, and the baffle 240 is flat plate-shaped with a plurality of baffles 240 spaced apart for ventilation.

A flat plate-shaped baffle 240 may also be used in combination with the curved baffle 240.

In the embodiment shown in fig. 10-13, the silencer assembly 200 includes a support plate 250, the baffle plates 240 are mounted on the support plate 250, and the support plate 250 is further connected to the front cover 420, for example, the support plate 250 may be adhered to the inner side of the front cover 420.

4. The silencer component 200 is a combination of the above-described structures

For example, a combination of sound absorbing cotton and porous sound deadening chamber structure: the area facing the fan system 160 uses sound absorbing cotton, so that the middle and high frequency band noise in 600 Hz-1000 Hz can be better absorbed, and the area facing the burner 140 and the heat exchanger 150 uses a porous silencing cavity structure, so that the low frequency band noise in 300Hz can be better absorbed.

Other combinations will not be described again.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

The above embodiments are only for illustrating the present invention, and are not limiting of the present invention. While the invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and it is intended to be covered by the scope of the claims of the present invention.

Claims

1. A gas water heater, comprising:

a bottom case;

the burner is arranged on the front surface of the bottom shell;

2. The gas water heater as recited in claim 1, wherein a silencing member is provided on an inner side of the front cover plate.

3. The gas water heater according to claim 2, wherein the silencing member has a silencing chamber provided with a silencing hole toward a wall surface of the bottom case.

4. A gas water heater according to claim 3, wherein the plurality of silencing cavities are arranged in an array, and each silencing cavity corresponds to a plurality of silencing holes arranged in an array.

5. The gas water heater according to claim 4, wherein at least one of the volume of at least two of the silencing chambers, the flow cross-sectional area of the silencing holes corresponding to at least two of the silencing chambers, and the density of the silencing holes corresponding to at least two of the silencing chambers is different.

6. The gas water heater as recited in claim 5, further comprising: the heat exchanger and the fan system are both arranged on the bottom shell;

7. The gas water heater of claim 2, wherein the silencing component comprises a plurality of baffles.

8. The gas water heater of any one of claims 1-7, wherein the second air inlet is provided in a bottom housing at a location remote from an air inlet of the burner.

9. The gas water heater of any one of claims 1-7, wherein the second air inlet is provided in a bottom housing at a location proximate to an air inlet of the burner.

10. The gas water heater of claim 9, wherein the second air inlet includes a first set of through holes disposed proximate to the primary air inlet of the burner and a second set of through holes disposed proximate to the secondary air inlet of the burner.

11. The gas water heater of claim 10, wherein the first set of through holes has a cross-sectional flow area A1 and the second set of through holes has a cross-sectional flow area A2 that satisfies: A1/A2 is more than or equal to 1 and less than or equal to 2.

12. The gas water heater according to any one of claims 1 to 7, wherein the bottom case includes a back plate, a top plate connected to an upper end of the back plate and bent forward, and a bottom plate connected to a lower end of the back plate and bent forward, the back plate is mounted to a back surface of the back plate, and the burner is mounted to a front surface of the back plate;