CN117006695A

CN117006695A - gas water heater

Info

Publication number: CN117006695A
Application number: CN202210459508.2A
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 shell with an opening; the burner is arranged on the bottom shell; the cover plate assembly is installed in the bottom shell and covers the opening, the cover plate assembly comprises a first cover plate and a second cover plate, the second cover plate is located between the combustor and the first cover plate, the cover plate assembly is provided with an air inlet channel located between the first cover plate and the second cover plate, the first cover plate is provided with a first air inlet communicated with the air inlet channel, the second cover plate 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 channel and the air inlet of the combustor. According to the gas water heater, the multi-layer cover plate structure is arranged, each layer of cover plate can weaken internal noise, a longer air inlet channel is formed by utilizing the cavity between the cover plates, 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. 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 a gas water heater, which can greatly reduce noise and air inlet resistance.

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

a bottom case having an opening;

the burner is arranged on the bottom shell;

the cover plate assembly is installed in the bottom shell and covers the opening, the cover plate assembly comprises a first cover plate and a second cover plate, the second cover plate is located between the burner and the first cover plate, the cover plate assembly is provided with an air inlet channel located between the first cover plate and the second cover plate, the first cover plate is provided with a first air inlet communicated with the air inlet channel, the second cover plate 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 channel and the air inlet of the burner.

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

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.

According to one embodiment of the present invention, the cross-sectional flow area of the first air inlet is P1, and the cross-sectional flow area of the second air inlet is P2, which satisfies the following conditions: P2/P1 is less than or equal to 1.5 and less than or equal to 3.

Through designing the second air inlet that is located inside to flow cross section area is greater than the first air inlet that is located outside, can eliminate because the flow passage resistance that the intake duct brought, further reduce the turbulent noise in the intake duct, and prevent that second air inlet department from producing the sound whistle.

According to one embodiment of the invention, the burner is mounted on a lower region of the bottom case, the second air inlet is located on a lower region of the second cover plate, and the first air inlet is located on an upper region of the first cover plate.

Like this, the length of intake duct is basic to be equivalent with the height of complete machine, can increase substantially the path length of noise along the outside propagation of intake duct, and outside first air intake is located the top, when installing the complete machine in the wall body, first air intake can be in the region that is close to the roof in the room basically, can not bring the wind sense to the user, and use experience is better.

According to one embodiment of the invention, the first cover plate is provided with a side wall plate facing the bottom shell, the side wall plate is provided with a turned-over edge bent inwards, and the second cover plate is arranged on one side of the turned-over edge, which is away from the bottom shell.

According to one embodiment of the invention, a silencing component is arranged in the air inlet channel, and the silencing component is mounted on at least one of the first cover plate and the second cover plate.

According to an embodiment of the present invention, the sound deadening member includes a plurality of regions that respectively correspond to different positions of the bottom chassis in the front-rear direction, and sound absorption parameters of the sound deadening member at least two of the regions are different.

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 the 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 invention, the silencing element comprises a plurality of baffles, the normal to at least part of the area of which baffles forms an angle of less than 30 ° with the direction of the air flow in the inlet duct.

According to one embodiment of the invention, the baffle is arc-shaped and curved in a direction away from the first air inlet.

According to one embodiment of the invention, a gasket is sandwiched between the cover assembly and the bottom case.

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

through setting up multilayer apron structure, every layer of apron all can play the effect of weakening to inside noise, has strengthened the sound insulation effect, and utilizes the cavity between the apron to form longer intake duct, can increase substantially the outward propagation's of noise along the intake duct path length, effectively improves the outward propagation's of noise transmission loss, and eliminates the noise that admits air basically, reduces runner resistance by a wide margin.

Further, 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.

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 air inlet of a gas water heater according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a cover plate assembly of a gas water heater according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram of a cover plate assembly of a gas water heater according to an embodiment of the present invention;

FIG. 6 is one of exploded views of a part of the structure of a gas water heater provided by 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 a second exploded view of a part of the structure of a gas water heater according to 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;

burner 140, heat exchanger 150, fan system 160, smoke tube 161, gasket 171, seal 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;

the first cover plate 310, the first air inlet 311, the side surrounding plate 312 and the flanging 313;

the second cover plate 320, the second air inlet 321, the first through hole group 322 and the second through hole group 323;

inlet 330.

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: a bottom case 100, a burner 140, and a cover plate assembly.

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 to the bottom case 100.

The bottom case 100 has an opening from which main functional components of the gas water heater can be mounted to the bottom case 100.

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 and 2, the bottom case 100 may include a back plate and a side plate, the back plate is located at a rear end of the bottom case 100, the opening is located at a front end of the bottom case 100, the side wall is connected with the back plate, and the side wall may include four plates, including an upper plate, a lower plate, a left plate and a right plate, and the back plate and the side wall may be an integrally formed 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 to the bottom case 100, and the burner 140 may be mounted to the bottom case 100 by a screw connection structure or a mounting structure such as a buckle.

As shown in fig. 1, 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 may communicate with a combustion chamber of the burner 140, and an oxidant (air) enters the burner 140 from an air inlet of the burner 140, is mixed with the gas and combusted in the combustion chamber, and water to be heated and high-temperature air exchange heat at the heat exchanger 150. The heat exchanger 150 may be located at an upper end of the burner 140.

The gas water heater may be of natural air intake type and 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. 1.

The cover assembly is mounted to the bottom case 100, and covers the opening, and the cover assembly may be located at the front end of the bottom case 100.

As shown in fig. 1-6, the cover assembly includes a first cover 310 and a second cover 320. Namely, the front end of the gas water heater is at least of a double-layer cover plate structure.

The second cover plate 320 is positioned between the burner 140 and the first cover plate 310, and the bottom case 100, the second cover plate 320, and the first cover plate 310 are sequentially arranged from rear to front.

Thus, when the working noise of the gas water heater is transmitted forward, the working noise needs to pass through at least the second cover plate 320 and the first cover plate 310, the second cover plate 320 and the first cover plate 310 can reflect most of the working noise directly transmitted outward, and the second cover plate 320 and the first cover plate 310 can block the direct path of the noise.

As shown in fig. 3, the cover assembly has an air inlet 330, the air inlet 330 is located between the first cover 310 and the second cover 320, and the first cover 310 and the second cover 320 define the air inlet 330.

As shown in fig. 1, 3 and 4, the first cover 310 is provided with a first air inlet 311, the first air inlet 311 is communicated with the air inlet 330, and the first air inlet 311 may be a through hole formed on the first cover 310, and the through hole penetrates through the first cover 310.

As shown in fig. 1 and 4, the first air inlet 311 may include a plurality of through holes formed in the first cover 310, and the through holes may have various shapes, including but not limited to: parallelogram, triangle, circle, other polygon, etc.

The plurality of through holes of the first air inlet 311 may be symmetrically arranged along the central axis of the air inlet 330, so that air intake is balanced, and smoothness of air flow in the air inlet 330 may be improved. For example, in the embodiment shown in fig. 1 and 4, the first air inlet 311 includes a triangular through hole at the center and a plurality of parallelogram through holes mirror-image distributed at both sides of the triangular through hole.

The second cover plate 320 is provided with a second air inlet 321, and the second air inlet 321 is communicated with the air inlet 330 and the air inlet of the burner 140. As shown in fig. 1 and 3, the second air inlet 321 is at a position where the second cover 320 faces away from the first air inlet 311. For example, in the case that the first air inlet 311 is located at the lower portion of the first cover 310, the second air inlet 321 is located at the upper portion of the second cover 320; in the case that the first air inlet 311 is located at the upper portion of the first cover plate 310, the second air inlet 321 is located at the lower portion of the second cover plate 320. So that the length of inlet 330 is sufficiently long.

The first cover plate 310 and the second cover plate 320 may be sheet metal structures, so that the fire resistance and the protection performance of the cover plate assembly are both strong.

The main function of inlet 330 is to introduce ambient air into burner 140, but the operating noise of the gas water heater also propagates outwardly through inlet 330. According to the gas water heater provided by the embodiment of the invention, through at least double-cover plate design, the path length of noise outwards propagating along the air inlet 330 can be greatly increased by more than 500%, and the transmission loss of the noise outwards propagating 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, the air inlet channel 330 is formed between the cover plates through at least a double-cover-plate design, the width of the air inlet channel 330 is equal to the width of the whole machine, the flow cross section area of the air inlet channel 330 can be increased, the air inlet channel 330 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.

In addition, in the related art, the air inlet holes are all arranged on the back of the whole machine, and after the whole machine is arranged on the wall body, the distance between the air inlet holes and the wall body is short, generally only 10 mm-20 mm, and the flow passage resistance is large.

According to the gas water heater provided by the embodiment of the invention, the first air inlet 311 is arranged at the front part of the whole machine, the air inlet is not blocked by an external structure, the air inlet resistance of the air inlet channel 330 can be greatly reduced, and the integral flow passage resistance is reduced by 70% through experimental calculation.

According to the gas water heater provided by the embodiment of the invention, through the arrangement of the multi-layer cover plate structure, each layer of cover plate can play a role in weakening internal noise, the sound insulation effect is enhanced, the longer and wider air inlet channel 330 is formed by utilizing the cavity between the cover plates, the path length of the noise which is transmitted outwards along the air inlet channel 330 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 passage resistance is greatly reduced.

In some embodiments, as shown in fig. 1, the burner 140 is mounted to a lower region of the bottom case 100, the first air inlet 311 is located at an upper region of the first cover plate 310, and the second air inlet 321 is located at a lower region of the second cover plate 320.

The length of the air inlet 330 is basically equal to the height of the whole machine, the path length of the noise which propagates outwards along the air inlet 330 can be greatly increased, the first air inlet 311 is arranged at the top end, when the whole machine is installed on a wall body, the first air inlet 311 is basically arranged in a room in a region close to the roof, the user cannot feel wind, and the use experience is better.

In some embodiments, the cross-sectional flow area of the first air inlet 311 is P1, and the cross-sectional flow area of the second air inlet 321 is P2, which satisfies the following conditions: 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 321 is designed to have a larger flow cross-sectional area than the first air inlet 311, which is located at the outside, so that the flow path resistance caused by the air inlet 330 can be eliminated, the turbulence noise in the air inlet 330 can be further reduced, and the acoustic whistle at the second air inlet 321 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 311 can be adjusted according to the maximum load of the gas water heater, and the larger the maximum load of the gas water heater is, the larger the cross-sectional area of the first air inlet 311 is, so as to ensure that the gas in the burner 140 can be fully 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 311 can be 2000mm ² ～3500mm ² Between, say p1=2500 mm ² 。

In some embodiments, as shown in fig. 2 and 5, the second air intake 321 may include a first group of through holes 322 and a second group of through holes 323. The first through hole group 322 is provided at a position close to the primary air intake of the burner 140, and the second through hole group 323 is provided at a position close to the secondary air intake 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 the first through hole group 322 and the second through hole group 323 for air inlet for the primary air inlet and the secondary air inlet, so that the burner 140 is helped to 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 in the embodiment shown in fig. 1 and 2 is on the right side and the secondary air inlet is on the bottom, and correspondingly, a first through hole group 322 and a second through hole group 323 as shown in fig. 2 are designed, the first through hole group 322 being on the right side, the second through hole group being on the left side, and the length of the first through hole group being longer, extending more upward to fit the primary air inlet.

The shapes of the through holes in the first through hole group 322 and the second through hole group 323 may be various, for example, in the embodiment shown in fig. 2, the first through hole group 322 and the second through hole group 323 may each include a plurality of elongated through holes, and the length of each through hole in the first through hole group 322 is longer than the length of each through hole in the second through hole group 323; in the embodiment shown in fig. 5, the first and second via groups 322 and 323 may each include a plurality of circular vias, each of the vias in the first via group 322 having a radius greater than that of each of the vias in the second via group 323.

Of course, the first and second via groups 322 and 323 may be designed in other shapes, such as a polygon, etc.

In some embodiments, the cross-sectional flow area of the first set of through holes 322 is A1 and the cross-sectional flow area of the second set of through holes 323 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 322 to be larger, the ratio of the primary intake air can be increased, which is helpful for reducing the emission of harmful gases such as CO, NO, etc., and in actual design, the value of A1/A2 can be adjusted according to specific combustion conditions, such as A1/a2=1.5, A1/a2=1.8, etc.

In some embodiments, as shown in fig. 3, the first cover 310 is provided with a side wall 312 facing the bottom case 100, the side wall 312 is provided with a flange 313 bent inward, and the second cover 320 is mounted on a side of the flange 313 facing away from the bottom case 100.

In this embodiment, the second cover 320 may be installed in the first cover 310, and the second cover 320 is located at the front side of the flange 313, so that the integrated cover assembly is easier to install, and only the first cover 310 is required to be installed on the bottom case 100, for example, the flange 313 of the first cover 310 is assembled with the bottom case 100 through a snap or screw connection structure.

Alternatively, a sealing structure may be further installed at the junction of the flange 313 of the first cover 310 and the bottom chassis 100 to prevent noise from being transmitted from the gap between the bottom chassis 100 and the cover assembly.

As shown in fig. 1 and 2, a gasket 171 is interposed between the cover assembly and the bottom chassis 100, and the gasket 171 may close the gap between the bottom chassis 100 and the first cover 310, and break the path where noise directly propagates outward. The gasket 171 may have a shape similar to the outer circumference of the bottom case 100, such as a tetragonal ring shape. The gasket 171 may be a gasket.

Of course, the second cover 320 may be designed outside the first cover 310, as shown in fig. 4 and 5, the second cover 320 is mounted on the rear side of the first cover 310, and when assembling, the second cover 320 needs to be connected with the bottom shell 100, for example, the second cover 320 is connected with the bottom shell 100 through a fastening or threaded connection structure.

Alternatively, the second cover 320 is located at the rear side of the first cover 310, and a sealing structure may be installed at the interface of the second cover 320 and the bottom chassis 100 to prevent noise from being transmitted from the gap between the bottom chassis 100 and the cover assembly. The gasket 171 is interposed between the cover assembly and the bottom chassis 100, and the gasket 171 may close the gap between the bottom chassis 100 and the second cover 320, breaking the path where the noise directly propagates outward. The gasket 171 may have a shape similar to the outer circumference of the bottom case 100, such as a tetragonal ring shape. The gasket 171 may be a gasket.

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 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 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 surface 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 of the present embodiment may further include other silencing members 200, and the silencing members 200 may be installed in the air inlet 330. As shown in fig. 1, 2 and 6, a silencing member 200 is provided in the intake duct 330, and the silencing member 200 is mounted to at least one of the second cover plate 320 and the first cover plate 310. The thickness of the silencer component 200 in the fore-and-aft direction is less than the thickness of the inlet duct 330 in the fore-and-aft direction, thus leaving sufficient passage for the inlet air to circulate.

The first cover plate 310 and the second cover plate 320 can reflect most of working noise directly transmitted outwards, and are combined with the silencing component 200 arranged in the air inlet channel 330, a part of noise is reflected by the second cover plate 320, most of noise penetrating through the second cover plate 320 can be absorbed by the silencing component 200, and the rest of noise is reflected by the first cover plate 310 again, so that the silencing effect is better.

The silencer component 200 may be mounted to the second cover plate 320 or the first cover plate 310 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, a sound absorbing cotton is disposed in the air inlet 330, and the sound absorbing cotton may be adhered to the first cover 310 or the second cover 320, and the thickness of the sound absorbing cotton in the front-rear direction may be smaller than the width of the air inlet 330 in the front-rear direction, so that a sufficiently large air inlet channel may be left to reduce air inlet resistance.

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. 6 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, a part of noise is reflected by the second cover plate 320, most of the noise penetrating through the second cover plate 320 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 few noise can be reflected by the first cover plate 310, 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. 8-9, 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 A-directed B means that the A and B projections substantially coincide in the front-to-back direction.

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＝1.2mm, 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, muffler component 200 includes a plurality of baffles 240, with at least a portion of the normal to the baffles 240 being spaced apart from each other by less than 30 ° from the direction of airflow within inlet 330, and with the plurality of baffles 240 being spaced apart for air circulation.

In other words, the baffle 240 faces the direction of the connection line between the second air inlet 321 and the first air inlet 311, so that noise is reflected back by the baffle 240 when it is transmitted from the second air inlet 321 to the first air inlet 311.

The labyrinth silencer can make the noise reflected for many times in the labyrinth flow channel, consume the energy of the noise, achieve the purpose of reducing the noise, and can greatly weaken the noise transmitted outwards through the air inlet channel 330.

As shown in fig. 10 to 12, the baffle 240 may be arc-shaped, and the baffle 240 is curved in a direction away from the first air inlet 311. Thus, the noise reflected by the baffle 240 is substantially directed toward the second air inlet 321, and the baffle 240 has a small resistance to the air intake from the first air inlet 311 to the second air inlet 321.

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 240 is mounted to the support plate 250, and the support plate 250 is further connected to the cover assembly, for example, the support plate 250 may be adhered to the inner side of the first cover 310.

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 having an opening;

the burner is arranged on the bottom shell;

2. The gas water heater of claim 1, wherein the second air inlet includes a first set of through holes and a second set of through holes, the first set of through holes being positioned proximate to the primary air inlet of the burner and the second set of through holes being positioned proximate to the secondary air inlet of the burner.

3. The gas water heater of claim 2, 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.

4. The gas water heater of claim 1, wherein the first air inlet has a cross-sectional flow area P1 and the second air inlet has a cross-sectional flow area P2, satisfying: P2/P1 is less than or equal to 1.5 and less than or equal to 3.

5. The gas water heater of claim 1, wherein the burner is mounted to a lower region of the bottom housing, the second air inlet is located in a lower region of the second cover plate, and the first air inlet is located in an upper region of the first cover plate.

6. The gas water heater of claim 1, wherein the first cover plate is provided with a side wall facing the bottom shell, the side wall is provided with a turned-over edge bent inwards, and the second cover plate is mounted on one side of the turned-over edge facing away from the bottom shell.

7. A gas water heater according to any one of claims 1-6, wherein a silencing component is provided in the inlet duct, the silencing component being mounted to at least one of the first and second cover plates.

8. The gas water heater according to claim 7, wherein the silencing member includes a plurality of regions respectively corresponding to different positions of the bottom case in the front-rear direction, and sound absorption parameters of the silencing member in at least two of the regions are different.

9. The gas water heater according to claim 7, wherein the silencing member has a silencing chamber provided with a silencing hole toward a wall surface of the bottom case.

10. The gas water heater according to claim 9, 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.

11. The gas water heater according to claim 10, 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.

12. A gas water heater according to claim 7, wherein the silencing element comprises a plurality of baffles, the normal to at least part of the area of the baffles being at an angle of less than 30 ° to the direction of airflow within the inlet duct.

13. The gas water heater of claim 12, wherein the baffle is arcuate and curved in a direction away from the first air inlet.

14. The gas water heater of any one of claims 1-6, wherein a gasket is sandwiched between the cover assembly and the bottom housing.