WO2023207961A1 - 燃气热水器的降噪装置和燃气热水器 - Google Patents

燃气热水器的降噪装置和燃气热水器 Download PDF

Info

Publication number
WO2023207961A1
WO2023207961A1 PCT/CN2023/090549 CN2023090549W WO2023207961A1 WO 2023207961 A1 WO2023207961 A1 WO 2023207961A1 CN 2023090549 W CN2023090549 W CN 2023090549W WO 2023207961 A1 WO2023207961 A1 WO 2023207961A1
Authority
WO
WIPO (PCT)
Prior art keywords
air inlet
water heater
gas water
silencing
cover
Prior art date
Application number
PCT/CN2023/090549
Other languages
English (en)
French (fr)
Inventor
崔福浩
唐伟鹏
马志浩
汪耀东
李忠华
刘建斌
杨�嘉
尹必行
Original Assignee
芜湖美的厨卫电器制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202210459508.2A external-priority patent/CN117006695A/zh
Priority claimed from CN202210459498.2A external-priority patent/CN114992859A/zh
Priority claimed from CN202221024859.2U external-priority patent/CN217236068U/zh
Application filed by 芜湖美的厨卫电器制造有限公司 filed Critical 芜湖美的厨卫电器制造有限公司
Publication of WO2023207961A1 publication Critical patent/WO2023207961A1/zh

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/16—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/02—Casings; Cover lids; Ornamental panels

Definitions

  • the present application relates to the technical field of household appliances, and in particular to a noise reduction device for a gas water heater and a gas water heater.
  • Gas water heaters are currently the most convenient and economical device for quickly heating water. Their energy conversion efficiency exceeds 90%. Compared with electric water heaters, gas water heaters are more energy-saving and more in line with "dual carbon" requirements. However, when the gas water heater is working normally, it will produce a lot of noise, especially low-frequency noise, which is difficult to isolate and will bring a bad experience to people who move near the water heater.
  • This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a noise reduction device for a gas water heater.
  • This application also proposes a gas water heater.
  • the base body is provided with a plurality of silencing cavities spaced apart along the working surface of the base body, and the working surface is provided with silencing holes. Each of the silencing cavities communicates with the outside world through its corresponding silencing hole. Connected.
  • the noise reduction device of the gas water heater through the structure of the porous silencer cavity, multiple reflections of noise can be achieved, consuming the energy of the noise and reducing the impact on users.
  • the work surface includes multiple areas.
  • At least one of the volume of the silencing cavity, the flow cross-sectional area of the silencing holes, and the density of the silencing holes corresponds to at least two areas of the working surface.
  • the different frequency characteristics of the combustion noise, water flow noise and flow-induced noise of the gas water heater can be silenced in a targeted manner.
  • a plurality of the muffler cavities are arranged in an array along the working surface.
  • each silencing cavity corresponds to a plurality of silencing holes arranged in an array.
  • the volume V of the silencer cavity satisfies: 10mm 3 ⁇ V ⁇ 455mm 3 .
  • the sound-absorbing hole is circular, and the hole diameter D satisfies: 0.6mm ⁇ D ⁇ 2mm.
  • the working surface includes a first area and a second area
  • the volume of the silencing cavity corresponding to the first area is V1
  • the aperture of the silencing hole corresponding to the first area is D1
  • the corresponding diameter of each silencing cavity corresponding to the first area is D1.
  • the number of silencer holes is N1, which satisfies: 60mm 3 ⁇ V1 ⁇ 455mm 3 , 0.6mm ⁇ D1 ⁇ 2mm, 50 ⁇ N1 ⁇ 75;
  • the volume of the silencing cavity corresponding to the second area is V2
  • the aperture of the silencing hole corresponding to the second area is D2
  • the corresponding diameter of each silencing cavity corresponding to the second area is D2.
  • the number of silencer holes is N2, which satisfies: 10mm 3 ⁇ V2 ⁇ 80mm 3 , 0.6mm ⁇ D2 ⁇ 2mm, 76 ⁇ N2 ⁇ 120.
  • the two muffler cavities with different volumes have different projected areas on the working surface.
  • the invention further includes: a first cover plate and a second cover plate.
  • the first cover plate and the second cover plate define an air inlet.
  • the base body is installed in the air inlet.
  • the device further includes: a front cover.
  • the base body is installed inside the front cover, and the working surface is a surface facing away from the front cover.
  • a burner, heat exchanger and fan system installed on the bottom shell
  • the noise reduction device as described in any one of the above, the noise reduction device is located at least on the front side of the heat exchanger and the fan system.
  • the gas water heater through the structure of the porous silencer cavity, multiple reflections of noise can be achieved, the energy of the noise is consumed, and the impact on users is reduced.
  • a bottom shell, the bottom shell has an opening
  • a burner the burner is installed on the bottom shell;
  • Cover assembly the cover assembly is installed on the bottom shell and covers the opening, the cover assembly includes a first cover and a second cover, the second cover is located on the burner Between the first cover plate and the first cover plate, the cover plate assembly has an air inlet channel located between the first cover plate and the second cover plate, and the first cover plate has an air inlet passage communicating with the air inlet passage.
  • the second cover plate is provided with a second air inlet at a position away from the first air inlet, and the second air inlet communicates with the air inlet of the air inlet duct and the burner. mouth.
  • the second air inlet includes a first through hole group and a second through hole group.
  • the first through hole group is located close to the primary air inlet of the burner.
  • the second through hole group is located close to the secondary air inlet of the burner.
  • the flow ratio of the primary air intake and the secondary air intake can be improved, helping the burner obtain Better combustion effect, reducing the content of CO and other harmful gases in the flue gas.
  • the flow cross-sectional area of the first through hole group is A1
  • the flow cross-sectional area of the second through hole group is A2, satisfying: 1 ⁇ A1/A2 ⁇ 2.
  • the flow cross-sectional area of the first air inlet is P1
  • the flow cross-sectional area of the second air inlet is P2, satisfying: 1.5 ⁇ P2/P1 ⁇ 3.
  • the second air inlet located inside By designing the second air inlet located inside to have a flow cross-sectional area larger than that of the first air inlet located outside, the flow channel resistance caused by the air inlet can be eliminated, further reducing the turbulent noise in the air inlet, and preventing the second air inlet from entering the air inlet. A whistling sound is produced at the wind outlet.
  • the burner is installed in a lower area of the bottom shell.
  • the second air inlet is located in a lower area of the second cover.
  • the first air inlet is located in an upper area of the first cover.
  • the length of the air inlet is basically equivalent to the height of the whole machine, which can greatly increase the length of the noise propagation path along the air inlet, and the first external air inlet is located at the top.
  • the first air inlet will basically be located in the area close to the roof in the room, which will not cause wind to the user and provide a better user experience.
  • the first cover is provided with a side panel facing the bottom shell.
  • the side panel is provided with an inwardly bent flange.
  • the second cover is installed on a side of the flange facing away from the bottom case.
  • a silencer component is provided in the air inlet.
  • the noise reduction component is installed on at least one of the first cover plate and the second cover plate.
  • the sound-absorbing component includes a plurality of areas.
  • the plurality of areas respectively correspond to different positions of the bottom shell in the front and rear directions.
  • the sound absorption parameters of the sound absorbing component in at least two of the regions are different.
  • the sound attenuating component has a sound attenuating cavity.
  • the silencing cavity is provided with a silencing hole on a wall surface facing the bottom case.
  • a plurality of the muffler cavities are arranged in an array.
  • each silencing cavity corresponds to a plurality of silencing holes arranged in an array.
  • the noise reduction component includes a plurality of baffles.
  • the angle between the normal line of at least a part of the baffle and the airflow direction in the air inlet is less than 30°.
  • the baffle is arc-shaped and bent in a direction away from the first air inlet.
  • a sealing gasket is sandwiched between the cover assembly and the bottom case.
  • each layer of cover plate will weaken the internal noise, enhance the sound insulation effect, and use the cavity between the cover plates to form a longer air intake channel, which can greatly increase the path length of the noise propagating outward along the intake duct, effectively improve the transmission loss of noise propagating outward, basically eliminate the intake noise, and greatly reduce the flow channel resistance.
  • Figure 1 is one of the structural schematic diagrams of the noise reduction device provided by the embodiment of the present application.
  • Figure 2 is the second structural schematic diagram of the noise reduction device provided by the embodiment of the present application.
  • Figure 3 is one of the exploded views of the gas water heater provided by the embodiment of the present application.
  • Figure 4 is one of the exploded views of the noise reduction device provided by the embodiment of the present application.
  • Figure 5 is the second exploded view of the gas water heater provided by the embodiment of the present application.
  • Figure 6 is the third exploded view of the gas water heater provided by the embodiment of the present application.
  • Figure 7 is the third structural schematic diagram of the noise reduction device provided by the embodiment of the present application.
  • Figure 8 is the fourth exploded view of the gas water heater provided by the embodiment of the present application.
  • Figure 9 is the fifth exploded view of the gas water heater provided by the embodiment of the present application.
  • Figure 10 is the sixth exploded view of the gas water heater provided by the embodiment of the present application.
  • Figure 11 is a schematic structural diagram of the air inlet of the gas water heater provided by the embodiment of the present application.
  • Figure 12 is one of the structural schematic diagrams of the cover plate assembly of the gas water heater provided by the embodiment of the present application.
  • Figure 13 is the second structural schematic diagram of the cover plate assembly of the gas water heater provided by the embodiment of the present application.
  • Figure 14 is one of the exploded views of a partial structure of the gas water heater provided by the embodiment of the present application.
  • Figure 15 is one of the structural schematic diagrams of the silencer components of the gas water heater provided by the embodiment of the present application.
  • Figure 16 is the second structural schematic diagram of the silencer component of the gas water heater provided by the embodiment of the present application.
  • Figure 17 is the second exploded view of part of the structure of the gas water heater provided by the embodiment of the present application.
  • Figure 18 is the third structural schematic diagram of the silencer component of the gas water heater provided by the embodiment of the present application.
  • Figure 19 is the fourth structural schematic diagram of the silencer component of the gas water heater provided by the embodiment of the present application.
  • Figure 20 is the fifth structural schematic diagram of the silencer component of the gas water heater provided by the embodiment of the present application.
  • Figure 21 is the sixth structural schematic diagram of the silencer component of the gas water heater provided by the embodiment of the present application.
  • FIG. 1 bottom shell 100; Burner 140, heat exchanger 150, fan system 160, smoke pipe 161, sealing gasket 171, sealing ring 172; silencer component 200, base 210, silencer cavity 220, first area 221, second area 222, silencer hole 230, baffle 240, support plate 250;
  • serial numbers of the components in the embodiments of this application are only used to distinguish the described objects. Does not have any sequential or technical meaning.
  • plural means two or more.
  • the words “including”, “including”, “having”, “containing”, etc. used in the embodiments of this application are all open terms, which mean including but not limited to.
  • the term “and/or” in the embodiment of this application is only an association relationship describing associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, and A and B exist simultaneously. , there are three situations of B alone.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a detachable connection. Or integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium.
  • connection should be understood in specific situations.
  • the first feature "on” or “below” the second feature may be that the first and second features are in direct contact, or the first and second features are in intermediate contact. Indirect media contact.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • references to the terms “one embodiment,” “some embodiments,” “an example,” “specific examples,” or “some examples” or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.
  • the noise reduction device of the gas water heater includes: a base body 210.
  • the base body 210 includes a working surface.
  • the working surface is used to face the noise source.
  • the noise source can be the fan system 160 of the gas water heater. Heat exchange system and burner 140.
  • the surface provided with the silencer holes 230 is the working surface.
  • the base 210 can be made of plastic, metal, ceramics or other materials.
  • a plurality of silencing cavities 220 are provided in the base 210 .
  • the plurality of silencing cavities 220 are spaced apart along the working surface of the base 210 .
  • Adjacent silencing cavities 220 are separated by physical partitions in the base 210 .
  • the muffler cavity 220 may be in the shape of a rectangular parallelepiped, a sphere, or other shapes, and the area of the base body 210 without the muffler cavity 220 may have a thin-walled structure to reduce the weight of the muffler component.
  • each silencing cavity 220 is connected to the outside world through its corresponding silencing hole 230.
  • the silencer hole 230 may be in a circular, triangular or square shape.
  • the fan system 160, the heat exchange system and the burner 140 will all generate operating noise.
  • the noise propagates outward, it can propagate to the silencer cavity 220 through the silencer hole 230, and pass through multiple times in the silencer cavity 220. Reflection consumes the energy of noise.
  • the noise reduction device in the embodiment of the present application can absorb low-frequency noise through the silencer cavity 220 and the silencer hole 230 .
  • the noise reduction device of the gas water heater through the structure of the porous silencer cavity 220, multiple reflections of noise can be achieved, the energy of low-frequency noise is consumed, and the impact on users is reduced.
  • the working surface includes multiple areas, and at least two areas correspond to at least one of a different volume of the silencing cavity 220 , a flow cross-sectional area of the silencing holes 230 , and a density of the silencing holes 230 .
  • the first area 221 faces the burner 140 and the heat exchanger 150.
  • the first area 221 faces the combustion chamber and the heat exchanger of the burner 140.
  • the heat exchanger 150; the second area 222 faces the fan system 160, where A faces B means that the projections of A and B in the front-to-back direction are substantially coincident.
  • At least one of the volumes of the at least two silencing cavities 220 , the flow cross-sectional areas of the silencing holes 230 corresponding to the at least two silencing cavities 220 , and the densities of the silencing holes 230 corresponding to the at least two silencing cavities 220 are different.
  • silencing cavities 220 there are at least two silencing cavities 220 that differ in at least one of the following three parameters: the volume of the silencing cavity 220 , the flow cross-sectional area of the silencing holes 230 , and the density of the silencing holes 230 corresponding to the silencing cavities 220 , so that the gas can be The different frequency characteristics of the water heater's combustion noise, water flow noise and flow-induced noise can be silenced in a targeted manner.
  • the volume of the silencing cavity 220 facing the burner 140 and the heat exchanger 150 is larger than the volume of the silencing cavity 220 facing the fan system 160 .
  • Combustion noise has obvious low-frequency characteristics and is highly penetrating.
  • Fan and water pump noises have obvious high-frequency characteristics, which are sharp and harsh, and have poor auditory experience.
  • the volume of the silencer cavity 220 toward the burner 140 and the heat exchanger 150 can be larger, low-frequency noise can be better absorbed.
  • two muffler cavities 220 with different volumes have different projected areas on the working surface.
  • the projected area of the muffler cavity 220 in the second region 222 on the working surface is larger than the projected area of the muffler cavity 220 in the first region 221 on the working surface.
  • the two muffler cavities 220 with different volumes may have the same depth along the direction perpendicular to the working surface, which facilitates processing.
  • the depths of the two muffler cavities 220 with different volumes in the direction perpendicular to the working surface can also be designed to be different.
  • the number of silencing holes 230 corresponding to the silencing cavity 220 facing the burner 140 and the heat exchanger 150 is less than that of the silencing cavity 220 facing the fan system 160 .
  • the number of silencer holes 230 By designing a larger number of silencing holes 230 corresponding to the silencing cavity 220 facing the fan system 160 , high-frequency noise can be better absorbed.
  • a plurality of silencing cavities 220 are arranged in an array along the working surface, and each silencing cavity 220 corresponds to a plurality of silencing holes 230 arranged in an array. In this way, there are a considerable number of silencing cavities 220 and silencing holes 230 in each area, thereby achieving multi-regional silencing.
  • the volume V of the muffler cavity 220 satisfies: 10mm 3 ⁇ V ⁇ 455mm 3 .
  • the inventor found that the muffler cavity 220 within this volume range can better absorb noise from 200Hz to 800Hz, and the operating noise of the gas water heater is basically within this range.
  • the silencing hole 230 may be circular.
  • the circular silencing hole 230 facilitates processing, and the aperture D of the silencing hole 230 satisfies: 0.6 mm ⁇ D ⁇ 2 mm.
  • the work surface includes first area 221 and second area 222;
  • the volume of the silencing cavity 220 corresponding to the first area 221 is V1
  • the aperture of the silencing holes 230 corresponding to the first area 221 is D1
  • the number of corresponding silencing holes 230 of each silencing cavity 220 corresponding to the first area 221 is N1.
  • V1 200mm 3
  • D1 1mm
  • N1 66.
  • This form of first area 221 can better absorb noise with a frequency of about 300 Hz.
  • the volume of the silencing cavity 220 corresponding to the second area 222 is V2
  • the aperture of the silencing holes 230 corresponding to the second area 222 is D2
  • the number of corresponding silencing holes 230 of each silencing cavity 220 corresponding to the second area 222 is N2.
  • the noise reduction device of the embodiment of the present application can also be used in combination with other sound insulation components.
  • the following is a detailed description of the embodiment of the present application in terms of two different structural forms.
  • the noise reduction device may also include: a first cover plate 310 and a second cover plate 320.
  • a first cover plate 310 and a second cover plate 320 When the operating noise of the gas water heater is transmitted forward, it needs to pass through at least the second cover plate 320 and the first cover plate 320.
  • the 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.
  • the first cover plate 310 and the second cover plate 320 define an air inlet channel, and the base body 210 is installed in the air inlet channel.
  • the air inlet is located between the first cover plate 310 and the second cover plate 320 .
  • the first cover 310 is provided with a first air inlet 311.
  • the first air inlet 311 is connected with the air inlet.
  • the first air inlet 311 can be a through hole opened on the first cover 310. The through hole penetrates the first cover 310 .
  • the first air inlet 311 may include a plurality of through holes opened on the first cover 310 .
  • the through holes may have a variety of shapes, including but not limited to: parallelogram, triangle, circle, and others. Polygons etc.
  • the plurality of through holes of the first air inlet 311 can be arranged symmetrically along the central axis of the air inlet, so that the air intake is balanced and the smoothness of the air flow in the air inlet can be improved.
  • the first air inlet 311 includes a triangular through hole in the center and a plurality of parallelogram through holes distributed in mirror image on both sides of the triangular through hole.
  • the second cover 320 is provided with a second air inlet 321 , and the second air inlet 321 communicates with the air inlet and the air inlet of the burner 140 .
  • the second air inlet 321 is at a position where the second cover 320 is away from the first air inlet 311 .
  • the second air inlet 321 is provided at the upper part of the second cover 320; when the first air inlet 311 is located at the upper part of the first cover 310, Bottom, the second air inlet 321 is provided at the bottom of the second cover 320 . This way the length of the air intake is long enough.
  • the first cover plate 310 and the second cover plate 320 can be of sheet metal structure, so that the cover plate assembly has strong fireproof performance and protective performance.
  • the main function of the air inlet is to introduce outside air into the burner 140, but the operating noise of the gas water heater will also be transmitted outward through the air inlet.
  • the gas water heater in the embodiment of the present application through at least a double cover plate design, can greatly increase the path length of the noise propagating outward along the air inlet, with an increase of more than 500%, effectively improving the transmission loss of the noise propagating outward.
  • some structures have also been designed to extend the air inlet channel, but they are all through pipe structures.
  • the length increase is limited.
  • the extended air inlet channel has a circulation cutoff. The small area will produce intake noise.
  • the noise reduction device of the gas water heater in the embodiment of the present application is designed with at least two covers to form an air inlet between the covers.
  • the width of the air inlet is equivalent to the width of the entire machine, which can increase the flow cross-sectional area of the air inlet.
  • the air inlet is linear, the flow channel resistance is small, the cross-sectional area difference is small, the flow field in the flow channel flows evenly, the intake flow velocity gradient is small, the turbulence noise generated is small, the intake noise can be basically eliminated, and the intake pressure There is basically no loss and the combustion efficiency of the burner 140 is not affected.
  • the air inlet holes are arranged on the back of the whole machine.
  • the distance between the air inlet hole and the wall is close, generally only 10 mm to 20 mm, and the flow channel resistance is large.
  • the first air inlet 311 is located at the front of the whole machine.
  • the air inlet will not be blocked by the external structure, and the air inlet resistance of the air inlet can be greatly reduced. According to experimental calculations, The overall flow channel resistance is reduced by 70%.
  • each layer of the cover will weaken the internal noise, enhance the sound insulation effect, and utilize the cavity between the covers
  • the formation of a longer and wider air inlet can greatly increase the path length of noise propagating outward along the air inlet, effectively increasing the transmission loss of outward noise propagation, basically eliminating air intake noise, and greatly reducing flow channel resistance.
  • the second air inlet 321 may include a first through hole group 322 and a second through hole group 323 .
  • the first through hole group 322 is located near the primary air inlet of the burner 140
  • the second through hole group 323 is located near the secondary air inlet of the burner 140 .
  • the burner 140 includes a primary air inlet and a secondary air inlet.
  • the primary air inlet is connected with the gas air inlet passage of the burner 140 and relies on the negative pressure generated by the high-speed passing gas to suck in air.
  • the secondary air inlet is The air inlet directly introduces air.
  • the primary air inlet of the burner 140 in the embodiment shown in Figure 3 is on the right side, and the secondary air inlet is at the bottom.
  • the first through hole group 322 and the third through hole group 322 as shown in Figure 3 are designed. Two through-hole groups 323, the first through-hole group 322 is located on the right side, and the second ventilation group is located on the left side, and the first ventilation group is longer and extends upward more to adapt to 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 have various shapes.
  • the first through hole group 322 and the second through hole group 323 Each may 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; or, the first through hole group 322 and the second through hole group 322 may each include a plurality of elongated through holes.
  • the through hole groups 323 may each include a plurality of circular through holes, and the radius of each through hole in the first through hole group 322 is larger than the radius of each through hole in the second through hole group 323 .
  • first through hole group 322 and the second through hole group 323 can also be designed in other shapes, such as polygons.
  • the flow cross-sectional area of the first through hole group 322 is A1
  • the flow cross-sectional area of the second through hole group 323 is A2, satisfying: 1 ⁇ A1/A2 ⁇ 2.
  • the proportion of primary air intake can be increased, which helps to reduce emissions of harmful gases such as CO and NO.
  • the noise reduction device may further include: a front cover 420 , the base 210 is installed inside the front cover 420 , and the working surface is a surface away from the front cover 420 .
  • the front cover 420 is installed on the front of the gas water heater, and the front cover 420 is used to reflect forward-propagating noise.
  • the front cover 420 can be a shell structure.
  • the front cover 420 can be an integrated structure to minimize the holes in the front cover 420 , or the front cover 420 can be an integrated non-porous structure. In this way, the radiated noise from the front of the gas water heater can be reduced.
  • the front cover 420 includes a panel 421 and a left side panel 422 and a right side panel 423 connected to the panel 421 .
  • the panel 421, the left side panel 422 and the right side panel 423 are formed into an integrated structure. This way, there are no gaps between the plates, which reduces noise transmitted backwards.
  • the rear cover and the front cover 420 can be of sheet metal structure, so that the fire resistance and protective properties of the rear cover and the front cover 420 are strong; or the rear cover and the front cover 420 can be of a plastic shell structure, so that The back cover plate and the front cover plate 420 are light in weight and easy to form.
  • a flame retardant can also be added to the plastic back cover plate and the plastic front cover plate 420 to enhance the fire resistance.
  • This application also provides a gas water heater.
  • the gas water heater includes: a bottom shell 100, a burner 140, a heat exchanger 150, a fan system 160 and the noise reduction device of any of the above embodiments.
  • the noise reduction device is located at least on the front side of the heat exchanger 150 and the fan system 160 .
  • Noise reduction devices are used to absorb forward-propagating operating noise.
  • the bottom shell 100 is used to support the main functional components of the gas water heater, and the main functional components of the gas water heater can be installed on the bottom shell 100 .
  • the bottom shell 100 has an opening, and the main functional components of the gas water heater can be installed on the bottom shell 100 from the opening.
  • the bottom case 100 can be a shell structure. In some embodiments, the bottom case 100 can be a one-piece structure to minimize the gap between the bottom case 100 and the rear mounting wall. Alternatively, the bottom case 100 can be a one-piece structure. Non-porous structure. In this way, the radiated noise from the back of the gas water heater can be reduced and the reflection of the back noise on the wall is weakened.
  • the bottom case 100 may include a back plate and a side plate.
  • the back plate is located at the rear end of the bottom case 100, and the opening is located at the front end of the bottom case 100.
  • the side panels and the back panel The boards are connected, and the side panels can include four panels on the top, bottom, left and right, and the back panel and side panels can be an integrally formed structure. This way, there are no gaps between the plates, which reduces noise transmitted backwards.
  • the bottom case 100 may include a back plate, a top plate and a bottom plate.
  • the back plate is located at the rear end of the bottom case 100, the top plate is connected to the upper end of the back plate, and the top plate is bent forward, and the bottom plate is connected to the lower end of the back plate. , and the base plate bends forward.
  • the back panel, top panel and bottom panel may be of one-piece structure. This way, there are no gaps between the plates, which reduces noise transmitted backwards.
  • the bottom shell 100 can be a metal shell structure, so that the bottom shell 100 has high strength and good fire resistance; or the bottom shell 100 can be a plastic shell structure, so that the bottom shell 100 is light in weight and easy to form.
  • the plastic bottom shell 100 Flame retardants can also be added to enhance fire resistance.
  • the burner 140, the heat exchanger 150 and the fan system 160 are installed on the bottom shell 100.
  • the burner 140, the heat exchanger 150 and the fan system 160 can be installed on the bottom shell 100 through a threaded connection structure or a buckle or other installation structure.
  • the heat exchanger 150 can be connected with the combustion chamber of the burner 140.
  • the oxidant (air) enters the burner 140 from the air inlet of the burner 140 and is mixed with the gas and burned in the combustion chamber.
  • the water to be heated and the high-temperature air are exchanged.
  • Heater 150 performs heat exchange.
  • the heat exchanger 150 may be located at the upper end of the burner 140.
  • the gas water heater through the structure of the porous silencer cavity 220, multiple reflections of noise can be achieved, the energy of the noise is consumed, and the impact on users is reduced.
  • a sealing gasket 171 is sandwiched between the cover assembly and the bottom case 100 .
  • the sealing gasket 171 can seal the space between the bottom case 100 and the first cover 310 gap to cut off the direct transmission path of noise there.
  • the shape of the sealing gasket 171 can be similar to the outer periphery of the bottom case 100, such as a square ring shape.
  • the sealing gasket 171 may be sealing cotton.
  • the gas water heater may also include a sealing ring 172.
  • the smoke pipe 161 of the fan system 160 penetrates the top plate of the bottom shell 100, and the sealing ring 172 is sleeved on the smoke pipe. 161 outside, and the sealing ring 172 is clamped between the smoke pipe 161 and the top plate of the bottom shell 100, which can block the gap between the smoke pipe 161 and the bottom shell 100, and cut off the direct transmission path of noise there.
  • the sealing ring 172 may include two sub-sections with different outer diameters, thus forming a step surface on the outside of the sealing ring 172.
  • the sub-section with a shorter outer diameter is extended into the through hole of the bottom case 100, and the step surface is formed.
  • the top plate that stops against the bottom case 100 can form a sealing structure that combines multiple surfaces, and the sound insulation effect is better.
  • the sealing ring 172 can be made of silicone.
  • the sealing ring 172 made of silicone is resistant to high temperatures and can prolong the aging time of the sealing ring 172 in the high-temperature environment of the smoke pipe 161 .
  • the gas water heater includes: a bottom shell 100, a burner 140 and a cover assembly.
  • the gas water heater may also include a heat exchanger 150.
  • the gas water heater can be of natural air intake type or forced exhaust type.
  • the forced exhaust gas water heater it can also include a fan system 160.
  • the fan system 160 can be installed on the upper end of the heat exchanger 150 as shown in Figure 9.
  • the cover assembly is installed on the bottom case 100 and covers the opening.
  • the cover assembly may be located at the front end of the bottom case 100 .
  • the cover plate assembly includes a first cover plate 310 and a second cover plate 320 . That is, the front end of the gas water heater must have at least a double-layer cover structure.
  • the second cover plate 320 is located between the burner 140 and the first cover plate 310.
  • the bottom shell 100, the second cover plate 320 and the first cover plate 310 are arranged in sequence from back to front.
  • the second cover plate 320 and the first cover plate 310 can reflect most of the noise and transmit it directly outwards.
  • the second cover plate 320 and the first cover plate 310 can block the direct path of the noise.
  • the cover assembly has an air inlet 330.
  • the air inlet 330 is located between the first cover 310 and the second cover 320.
  • the first cover 310 and the second cover 320 define the air inlet.
  • the first cover 310 is provided with a first air inlet 311.
  • the first air inlet 311 is connected with the air inlet 330.
  • the first air inlet 311 can be opened on the first cover.
  • the through hole on 310 penetrates the first cover 310 .
  • the first air inlet 311 may include a plurality of through holes opened on the first cover 310.
  • the through holes may have various shapes, including but not limited to: parallelogram, triangle, circle. shapes and other polygons, etc.
  • the plurality of through holes of the first air inlet 311 can be symmetrically arranged along the central axis of the air inlet 330, so that the air intake is balanced and the smoothness of the air flow in the air inlet 330 can be improved.
  • the first air inlet 311 includes a triangular through hole in the center and a plurality of parallelogram through holes distributed in mirror image on both sides of the triangular through hole.
  • the second cover 320 is provided with a second air inlet 321 , and the second air inlet 321 communicates with the air inlet 330 and the air inlet of the burner 140 .
  • the second air inlet 321 is at a position on the second cover 320 away from the first air inlet 311 .
  • the first air inlet 311 is located at the lower part of the first cover 310
  • the second air inlet 321 is provided at the upper part of the second cover 320
  • the first air inlet 311 is located at the upper part of the first cover 310
  • the second air inlet 321 is provided at the lower part of the second cover 320 . In this way, the length of the air inlet 330 is long enough.
  • the first cover plate 310 and the second cover plate 320 can be of sheet metal structure, so that the fireproof performance and protective performance of the cover plate assembly are both strong.
  • the main function of the air inlet 330 is to introduce outside air into the burner 140, but the operating noise of the gas water heater will also be transmitted outward through the air inlet 330.
  • the gas water heater in the embodiment of the present application through at least a double cover design, can greatly increase the path length of the noise propagating outward along the air inlet 330 by more than 500%, effectively improving the transmission loss of the noise propagating outward.
  • some structures have also been designed to extend the air inlet channel, but they are all through pipe structures.
  • the length increase is limited.
  • the extended air inlet channel has a circulation cutoff. The small area will produce intake noise.
  • the gas water heater in the embodiment of the present application is designed with at least two covers to form an air inlet 330 between the covers.
  • the width of the air inlet 330 is equivalent to the width of the entire machine, which can increase the flow cross-sectional area of the air inlet 330.
  • the air inlet 330 is linear, with small flow channel resistance and small cross-sectional area difference.
  • the flow field in the flow channel flows evenly, the intake flow velocity gradient is small, and the turbulence noise generated is small, which can basically eliminate the intake noise and improve the intake pressure. There is basically no loss and the combustion efficiency of the burner 140 is not affected.
  • the air inlet holes are arranged on the back of the whole machine.
  • the distance between the air inlet hole and the wall is close, generally only 10 mm to 20 mm, and the flow channel resistance is large.
  • the first air inlet 311 is located at the front of the whole machine.
  • the air inlet will not be blocked by the external structure, which can greatly reduce the air inlet resistance of the air inlet 330.
  • the overall flow channel Resistance reduced by 70%.
  • each layer of cover plate will weaken the internal noise, enhance the sound insulation effect, and use the cavity between the cover plates to form a longer and wider
  • the air inlet 330 can greatly increase the path length of the noise propagating outward along the air inlet 330, effectively increasing the transmission loss of the outward propagation of noise, basically eliminating the air intake noise, and greatly reducing the flow channel resistance.
  • the burner 140 is installed in the lower area of the bottom shell 100 , the first air inlet 311 is located in the upper area of the first cover 310 , and the second air inlet 321 is located in the second cover 320 the lower area.
  • the length of the air inlet 330 is basically equivalent to the height of the whole machine, which can greatly increase the length of the noise propagation path along the air inlet 330, and the external first air inlet 311 is located at the top.
  • the first air inlet 311 will basically be located in the area close to the roof in the room, which will not cause a sense of wind to the user and provide a better user experience.
  • the flow cross-sectional area of the first air inlet 311 is P1
  • the flow cross-sectional area of the second air inlet 321 is P2, which satisfies: 1.5 ⁇ P2/P1 ⁇ 3.
  • designing the second air inlet 321 located inside to have a flow cross-sectional area larger than that of the first air inlet 311 located outside can eliminate the flow channel resistance caused by the air inlet 330 and further reduce the flow rate in the air inlet 330 . turbulence noise, and prevent the second air inlet 321 from generating sound whistling.
  • the flow cross-sectional area of the first air inlet 311 can be adjusted according to the maximum load of the gas water heater.
  • the maximum load of the gas water heater can be 25kW, 30kW or 34kW, etc.
  • the second air inlet 321 may include a first through hole group 322 and a second through hole group 323 .
  • the first through hole group 322 is located near the primary air inlet of the burner 140
  • the second through hole group 323 is located near the secondary air inlet of the burner 140 .
  • the burner 140 includes a primary air inlet and a secondary air inlet.
  • the primary air inlet is connected with the gas air inlet passage of the burner 140 and relies on the negative pressure generated by the high-speed passing gas to suck in air.
  • the secondary air inlet is The air inlet directly introduces air.
  • the primary air inlet of the burner 140 in the embodiment shown in Figures 9 and 10 is on the right side, and the secondary air inlet is at the bottom.
  • a first through hole group is designed as shown in Figure 10 322 and the second through hole group 323, the first through hole group 322 is located on the right side, the second ventilation group is located on the left side, and the length of the first ventilation group is longer and extends upward more to adapt to 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 have various shapes.
  • the first through hole group 322 and the second through hole group 323 may each include A plurality of elongated through holes, 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 Figure 13, the first through hole The group 322 and the second through hole group 323 may each include a plurality of circular through holes, and the radius of each through hole in the first through hole group 322 is larger than the radius of each through hole in the second through hole group 323 .
  • first through hole group 322 and the second through hole group 323 can also be designed in other shapes, such as polygons.
  • the flow cross-sectional area of the first through hole group 322 is A1
  • the flow cross-sectional area of the second through hole group 323 is A2, satisfying: 1 ⁇ A1/A2 ⁇ 2.
  • the proportion of primary air intake can be increased, which helps to reduce emissions of harmful gases such as CO and NO.
  • the first cover 310 is provided with a side panel 312 facing the bottom case 100
  • the side panel 312 is provided with an inwardly bent flange 313
  • the second cover 320 is installed. On the side of the flange 313 facing away from the bottom case 100 .
  • the second cover plate 320 can be installed inside the first cover plate 310, and the second cover plate 320 is located on the front side of the flange 313. In this way, the integrated cover plate assembly is easier to install, and only the second cover plate 320 is installed.
  • a cover plate 310 is installed on the bottom case 100, for example, the flange 313 of the first cover plate 310 is assembled with the bottom case 100 through a buckle or threaded connection structure.
  • a sealing structure may be installed at the joint between the flange 313 of the first cover 310 and the bottom case 100 to prevent noise from spreading from the gap between the bottom case 100 and the cover assembly.
  • the second cover 320 can also be designed outside the first cover 310. As shown in Figures 12 and 13, the second cover 320 is installed on the rear side of the first cover 310. During assembly, the second cover 320 needs to be The second cover plate 320 is connected to the bottom case 100, for example, through a buckle or threaded connection structure.
  • the second cover 320 is located behind the first cover 310, and a sealing structure can be installed at the joint between the second cover 320 and the bottom case 100 to prevent noise from escaping from the gap between the bottom case 100 and the cover assembly. Spread it out.
  • a sealing gasket 171 is sandwiched between the cover plate assembly and the bottom case 100.
  • the sealing gasket 171 can seal the gap between the bottom case 100 and the second cover plate 320 and block the direct transmission path of noise there.
  • the shape of the sealing gasket 171 can be similar to the outer periphery of the bottom case 100, such as a square ring shape.
  • the sealing gasket 171 may be sealing cotton.
  • the gas water heater in the embodiment of the present application may also include other silencer components 200 , and the silencer components 200 may be installed in the air inlet 330 .
  • a silencer component 200 is provided in the air inlet 330
  • the silencer component 200 is installed on at least one of the second cover plate 320 and the first cover plate 310 .
  • the thickness of the muffler component 200 along the front-to-back direction is smaller than the thickness of the air inlet 330 along the front-to-back direction, so that sufficient channels can be left for the air to circulate.
  • the first cover plate 310 and the second cover plate 320 themselves can reflect most of the working noise directly transmitted outward. Combined with the silencer component 200 arranged in the air inlet 330, part of the noise is reflected by the second cover plate 320 and penetrates Most of the noise from the second cover plate 320 will be absorbed by the silencer component 200, and the remaining small amount of noise will be reflected by the first cover plate 310, resulting in a better noise reduction effect.
  • the silencer component 200 can be installed on the second cover plate 320 or the first cover plate 310 in various ways, including pasting, snapping or threaded connection.
  • the silencer component 200 can have a variety of structural forms. The embodiments of the present application will be specifically described below from four different structural forms.
  • the silencer component 200 is sound-absorbing cotton.
  • sound-absorbing cotton is provided in the air inlet 330.
  • the sound-absorbing cotton can be pasted on the first cover 310 or the second cover 320, and the thickness of the sound-absorbing cotton along the front and rear directions can be smaller than the thickness of the sound absorbing cotton along the front and rear directions of the air inlet 330.
  • the width of the direction can leave a large enough air intake channel to reduce the air intake resistance.
  • the sound-absorbing cotton may include a plurality of areas with different parameters distributed along a direction perpendicular to the front-to-back direction, and the parameters include at least one of bulk density and thickness. In this way, different areas have different sound absorption effects. According to the different noise characteristics of various parts of the gas water heater, the parameters of different areas of the sound-absorbing cotton can be designed.
  • the sound-absorbing component 200 includes multiple areas, and the multiple areas respectively correspond to different positions of the bottom shell 100 in the front-rear direction.
  • the sound-absorbing parameters of the sound-absorbing component 200 are different in at least two areas.
  • Combustion noise has obvious low-frequency characteristics and is highly penetrating.
  • Fan and water pump noises have obvious high-frequency characteristics, which are sharp and harsh, and have poor auditory experience.
  • the sound-absorbing cotton may include a first area and a second area.
  • the first area faces the burner 140 and the heat exchanger 150.
  • the first area faces the combustion chamber of the burner 140 and the heat exchanger 150;
  • the second area faces the burner 140 and the heat exchanger 150.
  • a facing B here means that the projections of A and B in the front-to-back direction are basically coincident.
  • the bulk density of the first region is greater than that of the second region, or the thickness of the first region is greater than the thickness of the second region.
  • the silencer component 200 is a porous silencer cavity structure.
  • the silencer component 200 has a silencer cavity 220 , and the silencer cavity 220 is provided with a silencer hole 230 toward the wall surface of the bottom case 100 .
  • the noise reduction component 200 includes a base 210 .
  • the surface (rear surface) of the base 210 facing the bottom case 100 is provided with a silencing hole 230 , and the silencing hole 230 is connected to the silencing cavity 220 .
  • each silencing cavity 220 corresponds to a plurality of silencing holes 230 arranged in an array.
  • noise in each area can be absorbed through the silencing holes 230 and the silencing cavity 220 .
  • At least one of the volumes of the at least two silencing cavities 220 , the flow cross-sectional areas of the silencing holes 230 corresponding to the at least two silencing cavities 220 , and the densities of the silencing holes 230 corresponding to the at least two silencing cavities 220 are different.
  • silencing cavities 220 there are at least two silencing cavities 220 that differ in at least one of the following three parameters: the volume of the silencing cavity 220 , the flow cross-sectional area of the silencing holes 230 , and the density of the silencing holes 230 corresponding to the silencing cavities 220 , so that the gas can be The different frequency characteristics of the water heater's combustion noise, water flow noise and flow-induced noise can be silenced in a targeted manner.
  • the volume of the silencing cavity 220 facing the burner 140 and the heat exchanger 150 is larger than the volume of the silencing cavity 220 facing the fan system 160 .
  • Combustion noise has obvious low-frequency characteristics and is highly penetrating.
  • Fan and water pump noises have obvious high-frequency characteristics, which are sharp and harsh, and have poor auditory experience.
  • the volume of the silencer cavity 220 toward the burner 140 and the heat exchanger 150 can be larger, low-frequency noise can be better absorbed.
  • the number of silencing holes 230 corresponding to the silencing cavity 220 facing the burner 140 and the heat exchanger 150 is less than the number of silencing holes 230 corresponding to the silencing cavity 220 facing the fan system 160 .
  • the base body 210 may include a first area 221 and a second area 222.
  • the first area 221 faces the burner 140 and the heat exchanger 150.
  • the first area 221 faces the burner.
  • the combustion chamber and heat exchanger 150 of 140; the second area 222 faces the fan system 160, where A faces B means that the projections of A and B in the front and back direction basically coincide.
  • the volume of the silencing cavity 220 corresponding to the first area 221 is V1
  • the aperture of the silencing holes 230 corresponding to the first area 221 is D1
  • the number of corresponding silencing holes 230 of each silencing cavity 220 corresponding to the first area 221 is N1.
  • V1 200mm 3
  • D1 1mm
  • N1 66.
  • This form of first area 221 can better absorb noise with a frequency of about 300 Hz.
  • the volume of the silencing cavity 220 corresponding to the second area 222 is V2
  • the aperture of the silencing holes 230 corresponding to the second area 222 is D2
  • the number of corresponding silencing holes 230 of each silencing cavity 220 corresponding to the second area 222 is N2.
  • the silencer component 200 is a labyrinth silencer.
  • the muffler component 200 includes a plurality of baffles 240 , and the angle between the normal line of at least part of the baffles 240 and the airflow direction in the air inlet 330 is less than 30°. , multiple baffles 240 are spaced apart for air circulation.
  • the baffle 240 is basically oriented in the direction of the line connecting the second air inlet 321 and the first air inlet 311. In this way, when the noise is transmitted from the second air inlet 321 to the first air inlet 311, it can be reflected back by the baffle 240. .
  • the labyrinth muffler can cause the noise to be reflected multiple times in the labyrinth flow channel, consume the energy of the noise, and achieve the purpose of reducing the noise, which can greatly weaken the noise propagated outward through the air inlet 330.
  • the baffle 240 may be arc-shaped, and the baffle 240 is bent in a direction away from the first air inlet 311 .
  • the noise reflected by the baffle 240 is basically directed toward the second air inlet 321, and the baffle 240 has little resistance to the air intake from the first air inlet 311 to the second air inlet 321.
  • the number and distribution of baffles 240 can be in various forms. As shown in Figure 18, the baffles 240 are short in length, large in number, and symmetrically arranged on the left and right sides; as shown in Figure 19, the baffles 240 are long in length, small in number, and symmetrically arranged on the left and right sides; as shown in Figure 20 It is shown that the length of the baffles 240 is long, the number is small, and the baffles 240 are arranged asymmetrically.
  • the baffle 240 may be in the shape of a flat plate. As shown in FIG. 21 , the baffle 240 is in the shape of a flat plate, and multiple baffles 240 are spaced apart for air circulation.
  • the flat baffle 240 and the arc-shaped baffle 240 can also be used in combination.
  • the silencer component 200 includes a support plate 250, the baffles 240 are installed on the support plate 250, and the support plate 250 is connected to the cover assembly.
  • the support plate 250 can be pasted on the first The inner side of the cover 310.
  • the silencer component 200 is a combination of the above structures.
  • the combination of sound-absorbing cotton and porous muffler cavity structure sound-absorbing cotton is used in the area facing the fan system 160, which can better absorb the noise in the mid-to-high frequency band of 600Hz to 1000Hz, and the area facing the burner 140 and heat exchanger 150 Using a porous muffler cavity structure, it can better absorb the low-frequency noise at 300Hz.

Abstract

本申请涉及家用电器技术领域，提供一种燃气热水器的降噪装置和燃气热水器，所述燃气热水器的降噪装置，包括：基体，所述基体内设有沿所述基体的工作表面间隔分布的多个消音腔，且所述工作表面设有消音孔，每个所述消音腔均通过各自对应的所述消音孔与外界连通。本申请的燃气热水器的降噪装置，通过多孔消音腔的结构，可实现噪音的多次反射，消耗低频噪音的能量，降低对用户的影响。

Description

燃气热水器的降噪装置和燃气热水器
相关申请的交叉引用
本申请要求于2022年04月27日提交的申请号为202210459498.2，发明名称为“燃气热水器的降噪装置和燃气热水器”、于2022年04月27日提交的申请号为202210459508.2，发明名称为“燃气热水器”、于2022年04月27日提交的申请号为202221024859.2，实用新型名称为“燃气热水器”的中国专利申请的优先权，其通过引用方式全部并入本文。
技术领域
本申请涉及家用电器技术领域，尤其涉及一种燃气热水器的降噪装置和燃气热水器。
背景技术
燃气热水器是目前最方便、经济的快速加热水的装置，其能量转化效率超过90％，相比于电热水器，燃气热水器更节能，更加符合“双碳”要求。但是燃气热水器在正常工作时，会产生较大的噪音，特别是低频噪音很多，难以被隔断，会对活动在热水器附近的人带来不好的体验。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请提出一种燃气热水器的降噪装置。
本申请还提出一种燃气热水器。
根据本申请第一方面实施例的燃气热水器的降噪装置，包括：
基体，所述基体内设有沿所述基体的工作表面间隔分布的多个消音腔，且所述工作表面设有消音孔，每个所述消音腔均通过各自对应的所述消音孔与外界连通。
根据本申请实施例的燃气热水器的降噪装置，通过多孔消音腔的结构，可实现噪音的多次反射，消耗噪音的能量，降低对用户的影响。
根据本申请的一个实施例，所述工作表面包括多个区域.
根据本申请的一个实施例，所述工作表面的至少两个区域对应的所述消音腔的体积、所述消音孔的流通截面积和所述消音孔的密度中至少一种不同。
通过设计不同参数的多个区域，可针对燃气热水器的燃烧噪音、水流噪音和流致噪音的不同频率特性，有针对性地进行消音。
根据本申请的一个实施例，多个所述消音腔沿所述工作表面呈阵列排布。
根据本申请的一个实施例，每个所述消音腔对应有呈阵列排布的多个所述消音孔。
根据本申请的一个实施例，所述消音腔的体积V满足：10mm3≤V≤455mm3。
根据本申请的一个实施例，所述消音孔为圆形，且孔径D满足：0.6mm≤D≤2mm。
根据本申请的一个实施例，所述工作表面包括第一区域和第二区域；
所述第一区域对应的所述消音腔的体积为V1，所述第一区域对应的所述消音孔的孔径为D1，所述第一区域对应的每个所述消音腔的对应的所述消音孔的数目为N1，满足：60mm3≤V1≤455mm3，0.6mm≤D1≤2mm，50≤N1≤75；
所述第二区域对应的所述消音腔的体积为V2，所述第二区域对应的所述消音孔的孔径为D2，所述第二区域对应的每个所述消音腔的对应的所述消音孔的数目为N2，满足：10mm3≤V2≤80mm3，0.6mm≤D2≤2mm，76≤N2≤120。
根据本申请的一个实施例，体积不同的两个所述消音腔在所述工作表面的投影面积不相同。
根据本申请的一个实施例，还包括：第一盖板和第二盖板。
根据本申请的一个实施例，所述第一盖板和所述第二盖板限定出进气道。
根据本申请的一个实施例，所述基体安装于所述进气道内。
根据本申请的一个实施例，还包括：前盖板。
根据本申请的一个实施例，所述基体安装于所述前盖板内侧，且所述工作表面为背离所述前盖板的表面。
本申请本申请本申请本申请本申请本申请本申请本申请根据本申请第二方面实施例的燃气热水器，包括：
底壳；
安装于所述底壳的燃烧器、换热器和风机系统；
如上述任一种所述的降噪装置，所述降噪装置至少位于所述换热器和所述风机系统的前侧。
根据本申请实施例的燃气热水器，通过多孔消音腔的结构，可实现噪音的多次反射，消耗噪音的能量，降低对用户的影响。
根据本申请第三方面实施例的燃气热水器，包括：
底壳，所述底壳具有敞口；
燃烧器，所述燃烧器安装于所述底壳；
盖板组件，所述盖板组件安装于所述底壳，且遮盖所述敞口，所述盖板组件包括第一盖板和第二盖板，所述第二盖板位于所述燃烧器与所述第一盖板之间，所述盖板组件具有位于所述第一盖板与所述第二盖板之间的进气道，所述第一盖板设有连通所述进气道的第一进风口，所述第二盖板在背离所述第一进风口的位置设有第二进风口，所述第二进风口连通所述进气道与所述燃烧器的进气口。
根据本申请的一个实施例，所述第二进风口包括第一通孔组和第二通孔组。
根据本申请的一个实施例，所述第一通孔组设于靠近所述燃烧器的一次进气口的位置。
根据本申请的一个实施例，所述第二通孔组设于靠近所述燃烧器的二次进气口的位置。
通过为一次进气口和二次进气口独立设计用于进气的第一通孔组和第二通孔组，可改善一次进气和二次进气的流量占比，帮助燃烧器获得更好的燃烧效果，降低烟气中的CO等有害气体含量。
根据本申请的一个实施例，所述第一通孔组的流通截面积为A1，所述第二通孔组的流通截面积为A2，满足：1≤A1/A2≤2。
根据本申请的一个实施例，所述第一进风口的流通截面积为P1，所述第二进风口的流通截面积为P2，满足：1.5≤P2/P1≤3。
通过将位于内部的第二进风口设计为流通截面积大于位于外部的第一进风口，可消除由于进气道带来的流道阻力，进一步降低进气道内的湍流噪音，且防止第二进风口处产生声啸。
根据本申请的一个实施例，所述燃烧器安装于所述底壳的下部区域。
根据本申请的一个实施例，所述第二进风口位于所述第二盖板的下部区域。
根据本申请的一个实施例，所述第一进风口位于所述第一盖板的上部区域。
这样，进气道的长度基本与整机的高度相当，可大幅度增加噪音沿进气道向外传播的路径长度，且外部的第一进风口位于顶端，当将整机安装于墙体时，第一进风口基本会处于房间内靠近房顶的区域，不会对用户带来风感，使用体验更好。
根据本申请的一个实施例，所述第一盖板设有朝向所述底壳的侧围板。
根据本申请的一个实施例，所述侧围板设有朝内弯折的翻边。
根据本申请的一个实施例，所述第二盖板安装于所述翻边背离所述底壳的一侧。
根据本申请的一个实施例，所述进气道内设有消音部件。
根据本申请的一个实施例，所述消音部件安装于所述第一盖板和所述第二盖板中的至少一个。
根据本申请的一个实施例，所述消音部件包括多个区域。
根据本申请的一个实施例，所述多个区域在前后方向上分别对应所述底壳的不同位置。
根据本申请的一个实施例，所述消音部件在至少两个所述区域的吸音参数不同。
根据本申请的一个实施例，所述消音部件具有消音腔。
根据本申请的一个实施例，所述消音腔朝向所述底壳的壁面设有消音孔。
根据本申请的一个实施例，所述消音腔为多个。
根据本申请的一个实施例，多个所述消音腔呈阵列排布。
根据本申请的一个实施例，每个所述消音腔对应有呈阵列排布的多个所述消音孔。
根据本申请的一个实施例，至少两个所述消音腔的体积、至少两个所述消音腔对应的所述消音孔的流通截面积和至少两个所述消音腔对应的所述消音孔的密度中至少一种不同。
根据本申请的一个实施例，所述消音部件包括多个挡板。
根据本申请的一个实施例，所述挡板的至少部分区域的法线与所述进气道内的气流方向的夹角小于30°。
根据本申请的一个实施例，所述挡板为弧形，且朝背离所述第一进风口的方向弯曲。
根据本申请的一个实施例，所述盖板组件与所述底壳之间夹有密封垫。
根据本申请实施例的燃气热水器，通过设置多层盖板结构，每层盖板都会对内部噪音起到削弱作用，增强了隔音效果，且利用盖板之间的空腔形成较长的进气道，可大幅度增加噪音沿进气道向外传播的路径长度，有效提高噪音向外传播的传递损失，且基本消除进气噪音，大幅降低流道阻力。
本申请本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的降噪装置的结构示意图之一；
图2是本申请实施例提供的降噪装置的结构示意图之二；
图3是本申请实施例提供的燃气热水器的爆炸图之一；
图4是本申请实施例提供的降噪装置的爆炸图之一；
图5是本申请实施例提供的燃气热水器的爆炸图之二；
图6是本申请实施例提供的燃气热水器的爆炸图之三；
图7是本申请实施例提供的降噪装置的结构示意图之三；
图8是本申请实施例提供的燃气热水器的爆炸图之四；
图9是本申请实施例提供的燃气热水器的爆炸图之五；
图10是本申请实施例提供的燃气热水器的爆炸图之六；
图11是本申请实施例提供的燃气热水器的进气道的结构示意图；
图12是本申请实施例提供的燃气热水器的盖板组件的结构示意图之一；
图13是本申请实施例提供的燃气热水器的盖板组件的结构示意图之二；
图14是本申请实施例提供的燃气热水器的部分结构的爆炸图之一；
图15是本申请实施例提供的燃气热水器的消音部件的结构示意图之一；
图16是本申请实施例提供的燃气热水器的消音部件的结构示意图之二；
图17是本申请实施例提供的燃气热水器的部分结构的爆炸图之二；
图18是本申请实施例提供的燃气热水器的消音部件的结构示意图之三；
图19是本申请实施例提供的燃气热水器的消音部件的结构示意图之四；
图20是本申请实施例提供的燃气热水器的消音部件的结构示意图之五；
图21是本申请实施例提供的燃气热水器的消音部件的结构示意图之六。
附图标记：
底壳100；
燃烧器140，换热器150，风机系统160，烟管161，密封垫171，密封圈172；消
音部件200，基体210，消音腔220，第一区域221，第二区域222，消音孔230，挡板240，支撑板250；
第一盖板310，第一进风口311，侧围板312，翻边313；
第二盖板320，第二进风口321，第一通孔组322，第二通孔组323；
进气道330；
前盖板420，面板421，左侧板422，右侧板423。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例用于说明本申请，但不能用来限制本申请的范围。
本申请实施例中部件所编序号本身，例如“第一”、“第二”；(1)、(2)、(3)；步骤一、步骤二等，仅用于区分所描述的对象，不具有任何顺序或技术含义。除非另有说明，“多个”的含义是指两个或两个以上。本申请实施例中所使用的“包含”、“包括”、“具有”、“含有”等，均为开放性的用语，即意指包含但不限于。本申请实施例中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。除非另有定义，本申请实施例所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。如有不一致，以本说明书中所说明的含义或者根据本说明书中记载的内容得出的含义为准。
在本申请实施例的描述中，需要说明的是，术语“中心”、“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，需要说明的是，除非另有明确的规定和限定，术语“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请实施例中的具体含义。
在本申请实施例中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请实施例的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
下面结合图1-图21描述本申请实施例的燃气热水器的降噪装置和燃气热水器。
如图1和图2所示，本申请实施例的燃气热水器的降噪装置包括：基体210，基体210包括工作表面，工作表面用于朝向噪音源，噪音源可以为燃气热水器的风机系统160、换热系统和燃烧器140。图1和图2中设有消音孔230的表面即为工作表面。
基体210可以为塑料或金属或陶瓷等材料制成。
基体210内设有多个消音腔220，多个消音腔220沿基体210的工作表面间隔分布，相邻的消音腔220之间通过基体210内的实体隔断。
消音腔220可以为长方体形或者球形或其他形状，基体210未设消音腔220的区域可以为薄壁结构，以降低消音部件的重量。
工作表面设有消音孔230，每个消音腔220均通过各自对应的消音孔230与外界连通。
消音孔230可以为圆形、三角形或方形等形状。
在燃气热水器工作时，风机系统160、换热系统和燃烧器140均会产生工作噪音，噪音在向外传播时，可通过消音孔230传播到消音腔220，通过在消音腔220内的多次反射，消耗噪音的能量。
特别是对于燃气热水器工作时产生的低频噪音，相关技术中的隔音棉等吸音材料均能以有效，本申请实施例的降噪装置通过消音腔220配合消音孔230，可消纳低频噪音。
根据本申请实施例的燃气热水器的降噪装置，通过多孔消音腔220的结构，可实现噪音的多次反射，消耗低频噪音的能量，降低对用户的影响。
在一些实施例中，如图2所示，工作表面包括多个区域，至少两个区域对应的消音腔220的体积、消音孔230的流通截面积和消音孔230的密度中至少一种不同。
当将该降噪装置安装于燃气热水器时，如图5和图8所示，第一区域221朝向燃烧器140和换热器150，优选地，第一区域221朝向燃烧器140的燃烧室和换热器150；第二区域222朝向风机系统160，此处的A朝向B指在前后方向上A和B投影基本重合。
至少两个消音腔220的体积、至少两个消音腔220对应的消音孔230的流通截面积和至少两个消音腔220对应的消音孔230的密度中至少一种不同。
换言之，存在至少两个消音腔220的如下三个的参数中的至少一个不同：消音腔220的体积、消音孔230的流通截面积、消音腔220对应的消音孔230的密度，这样可针对燃气热水器的燃烧噪音、水流噪音和流致噪音的不同频率特性，有针对性地进行消音。
在一些实施例中，当将该降噪装置安装于燃气热水器时，朝向燃烧器140和换热器150的消音腔220的体积大于朝向风机系统160的消音腔220的体积。
发明人经过研究发现，燃气热水器正常工作的噪音来源包括：燃烧噪音、风机噪音、燃气喷射噪音、机械振动噪音和水流噪音等。燃烧噪音具有明显的低频特性，穿透性强，风机和水泵噪音具有明显的高频特性，尖锐刺耳，听觉感受差。
通过将朝向燃烧器140和换热器150的消音腔220的体积设计得更大，可更好地消纳低频噪音。
如图2所示，体积不同的两个消音腔220在工作表面的投影面积不相同。比如图2中第二区域222中的消音腔220在工作表面的投影面积大于第一区域221中的消音腔220在工作表面的投影面积。
体积不同的两个消音腔220沿垂直于工作表面的方向的深度可以相同，这样便于加工。
当然，体积不同的两个消音腔220沿垂直于工作表面的方向的深度也可设计的不同。
在一些实施例中，当将该降噪装置安装于燃气热水器时，朝向燃烧器140和换热器150的消音腔220对应的消音孔230的数目少于朝向风机系统160的消音腔220对应的消音孔230的数目。通过将朝向风机系统160的消音腔220对应的消音孔230的数目设计得更多，可更好地消纳高频噪音。
多个消音腔220沿工作表面呈阵列排布，每个消音腔220对应有呈阵列排布的多个消音孔230。这样，各个区域均存在数目相当多的消音腔220和消音孔230，可实现多区域的消音。
在一些实施例中，消音腔220的体积V满足：10mm3≤V≤455mm3。发明人经过大量研究发现，处于该体积范围内的消音腔220，可较好地消纳200Hz-800Hz的噪音，而燃气热水器的工作噪音基本均位于该区间。比如V＝100mm3，或者V＝200mm3，或者V＝300mm3，或者V＝400mm3。
在一些实施例中，消音孔230可以为圆形，圆形的消音孔230便于加工，消音孔230孔径D满足：0.6mm≤D≤2mm。发明人经过大量研究发现，处于该大小范围内的消音孔230，可较好地引入200Hz-800Hz的噪音，而燃气热水器的工作噪音基本均位于该区间。比如D＝0.8mm，或者D＝1.0mm，或者D＝1.5mm。
在一些实施例中，工作表面包括第一区域221和第二区域222；
第一区域221对应的消音腔220的体积为V1，第一区域221对应的消音孔230的孔径为D1，第一区域221对应的每个消音腔220的对应的消音孔230的数目为N1，满足：60mm3≤V1≤455mm3，0.6mm≤D1≤2mm，50≤N1≤75；比如V1＝200mm3，D1＝1mm，N1＝66。这种形式的第一区域221可较好地消纳频率约为300Hz的噪音。
第二区域222对应的消音腔220的体积为V2，第二区域222对应的消音孔230的孔径为D2，第二区域222对应的每个消音腔220的对应的消音孔230的数目为N2，满足：10mm3≤V2≤80mm3，0.6mm≤D2≤2mm，76≤N2≤120。比如V1＝50mm3，D1＝1.2mm，N1＝99。这种形式的第二区域222可较好地消纳频率约为600Hz-800Hz的噪音。
本申请实施例的降噪装置还可以结合其他隔音的部件一起使用，下面从两种不同的结构形式，对本申请实施例进行具体说明。
一、结合多层板，消纳进气道内的噪音
如图4所示，该降噪装置还可以包括：第一盖板310和第二盖板320，该燃气热水器的工作噪音在向前传递时，需要至少穿过第二盖板320和第一盖板310，第二盖板320和第一盖板310可反射绝大部分直接向外传递的工作噪音，第二盖板320和第一盖板310可阻断噪音的直射途径。
第一盖板310和第二盖板320限定出进气道，基体210安装于进气道内。进气道位于第一盖板310与第二盖板320之间。
如图4所示，第一盖板310设有第一进风口311，第一进风口311与进气道连通，第一进风口311可以为开设在第一盖板310上的通孔，该通孔贯穿第一盖板310。
如图4所示，第一进风口311可以包括开设在第一盖板310上的多个通孔，通孔的形状可以有多种，包括但不限于：平行四边形、三角形、圆形和其他多边形等。
第一进风口311的多个通孔可以沿进气道的中轴线对称布置，这样进气均衡，可以提高进气道内气流的平顺程度。比如在如图3所示的实施例中，第一进风口311包括位于中心的三角形通孔和镜像分布在三角形通孔两侧的多个平行四边形通孔。
第二盖板320设有第二进风口321口，第二进风口321口连通进气道与燃烧器140的进气口。如图3和图4所示，第二进风口321口在第二盖板320背离第一进风口311的位置。比如，在第一进风口311位于第一盖板310下部的情况下，第二进风口321口设于第二盖板320的上部；在第一进风口311位于第一盖板310上部的情况下，第二进风口321口设于第二盖板320的下部。这样进气道的长度足够长。
第一盖板310和第二盖板320可以为钣金结构，这样盖板组件的防火性能和防护性能都较强。
进气道的主要作用是将外界空气引入燃烧器140，但是燃气热水器的工作噪音也会通过进气道向外传播。本申请实施例的燃气热水器，通过至少双盖板设计，可大幅度增加噪音沿进气道向外传播的路径长度，增幅大于500％，有效提高噪音向外传播的传递损失。
相关技术中，也设计过一些结构来则延长进气通道，但是均是通过管道式结构，一方面由于燃气热水器整机体积的限制，长度增幅有限，另一方面，延长的进气通道流通截面积小，反而会产生进气噪音。
本申请实施例的燃气热水器的降噪装置，通过至少双盖板设计，在盖板之间形成进气道，进气道的宽度与整机宽度相当，可增大进气道的流通截面积，且进气道为直线型，流道阻力小，截面面积差异小，流道内流场流动均匀、进气流动速度梯度小，产生的湍流噪音小，可基本消除进气噪音，且进气压力基本无损失，不影响燃烧器140的燃烧效率。
另外，相关技术中，进气孔均设置在整机背部，而将整机安装于墙体后，进气孔与墙体的距离近，一般仅有10mm～20mm，流道阻力大。
本申请实施例的燃气热水器的降噪装置，将第一进风口311设于整机前部，进气不会受到外部结构的阻挡，可大幅降低进气道的进气阻力，经试验计算，整体流道阻力降低70％。
根据本申请实施例的燃气热水器的降噪装置，通过设置多层前盖板420结构，每层盖板都会对内部噪音起到削弱作用，增强了隔音效果，且利用盖板之间的空腔形成较长较宽的进气道，可大幅度增加噪音沿进气道向外传播的路径长度，有效提高噪音向外传播的传递损失，可基本消除进气噪音，大幅降低流道阻力。
在一些实施例中，如图3和图4所示，第二进风口321口可以包括第一通孔组322和第二通孔组323。第一通孔组322设于靠近燃烧器140的一次进气口的位置，第二通孔组323设于靠近燃烧器140的二次进气口的位置。
可以理解的是，燃烧器140包括一次进气口和二次进气口，一次进气口与燃烧器140的燃气进气通道连通，依靠高速通过的燃气产生的负压吸入空气，二次进气口直接引入空气，通过为一次进气口和二次进气口独立设计用于进气的第一通孔组322和第二通孔组323，可改善一次进气和二次进气的流量占比，帮助燃烧器140获得更好的燃烧效果，降低烟气中的CO等有害气体含量。
比如，图3所示的实施例中的燃烧器140的一次进气口在右侧，二次进气口在底部，对应地，设计了如图3所示的第一通孔组322和第二通孔组323，第一通孔组322位于右侧，第二通风组位于左侧，且第一通风组的长度更长，向上延伸的更多，以适配一次进气口。
第一通孔组322和第二通孔组323中通孔的形状可以有多种，比如在图3和图4所示的实施例中，第一通孔组322和第二通孔组323可各自包括多个长条形通孔，第一通孔组322中各通孔的长度较第二通孔组323中各通孔的长度更长；或者，第一通孔组322和第二通孔组323可各自包括多个圆形通孔，第一通孔组322中各通孔的半径较第二通孔组323中各通孔的半径更大。
当然，第一通孔组322和第二通孔组323还可以设计为其他形状，比如多边形等。
在一些实施例中，第一通孔组322的流通截面积为A1，第二通孔组323的流通截面积为A2，满足：1≤A1/A2≤2。通过将第一通孔组322的流通截面积设计得更大，可增大一次进气的占比，有助于降低CO、NO等有害气体排放，在实际设计时，可根据具体燃烧情况，调整A1/A2的值，比如A1/A2＝1.5，或A1/A2＝1.8等。
二、结合单层板，直接消纳向外传播的噪音
如图6所示，该降噪装置还可以包括：前盖板420，基体210安装于前盖板420内侧，且工作表面为背离前盖板420的表面。
前盖板420安装于燃气热水器的正面，前盖板420用于反射向前传播的噪音。
前盖板420可以为壳式结构，在一些实施例中，前盖板420可以为一体式结构，以尽量减少前盖板420的孔隙，或者，前盖板420可以为一体式无孔结构。这样，可以降低燃气热水器前部的辐射噪音。
如图7所示，前盖板420包括面板421以及与面板421相连的左侧板422和右侧板423。面板421、左侧板422和右侧板423形成为一体式结构。这样，板间无孔隙，可减少向后传递的噪音。
后盖板和前盖板420可以为钣金结构，这样后盖板和前盖板420的防火性能和防护性能都较强；或者后盖板和前盖板420可以为塑料壳式结构，这样后盖板和前盖板420的质量轻，且便于成型，塑料后盖板和塑料前盖板420中还可加入阻燃剂以增强防火性能。
本申请还提供了一种燃气热水器。
如图3和图6所示，本申请实施例的燃气热水器包括：底壳100、燃烧器140、换热器150、风机系统160和上述任一种实施例的降噪装置。降噪装置至少位于换热器150和风机系统160的前侧。降噪装置用于消纳向前传播的工作噪音。
底壳100用于支撑燃气热水器的主要功能器件，燃气热水器的主要功能器件可以安装于底壳100。
底壳100具有敞口，燃气热水器的主要功能器件可以从敞口处安装于底壳100。
底壳100可以为壳式结构，在一些实施例中，底壳100可以为一体式结构，以尽量减少底壳100与后方的安装墙体之间的孔隙，或者，底壳100可以为一体式无孔结构。这样，可以降低燃气热水器背部的辐射噪音，削弱背部噪音在安装墙体上的反射。
如图3、如图9和图10所示，所示，底壳100可以包括背板和侧板，背板位于底壳100的后端，敞口位于底壳100的前端，侧围与背板相连，且侧围可以包括上下左右的四块板，背板和侧围可以为一体成型的结构。这样，板间无孔隙，可减少向后传递的噪音。
如图5所示，底壳100可以包括背板、顶板和底板，背板位于底壳100的后端，顶板与背板的上端相连，且顶板向前弯折，底板与背板的下端相连，且底板向前弯折。背板、顶板和底板可以为一体式结构。这样，板间无孔隙，可减少向后传递的噪音。
底壳100可以为金属壳式结构，这样底壳100的强度大，且防火性能好；或者底壳100可以为塑料壳式结构，这样底壳100的质量轻，且便于成型，塑料底壳100中还可加入阻燃剂以增强防火性能。
燃烧器140、换热器150和风机系统160安装于底壳100，燃烧器140、换热器150和风机系统160可以通过螺纹连接结构或者卡扣等安装结构，安装于底壳100。
换热器150可以与燃烧器140的燃烧室连通，氧化剂(空气)从燃烧器140的进气口进入燃烧器140，并与燃气混合且在燃烧室燃烧，待加热的水和高温空气在换热器150进行换热。换热器150可以位于燃烧器140的上端。
根据本申请实施例的燃气热水器，通过多孔消音腔220的结构，可实现噪音的多次反射，消耗噪音的能量，降低对用户的影响。
在一些实施例中，如图3、图9和图10所示，盖板组件与底壳100之间夹有密封垫171，密封垫171可封堵底壳100与第一盖板310之间的间隙，断绝该处噪音向外直接传播的路径。密封垫171的形状可以与底壳100的外周类似，比如为四方环形。密封垫171可以为密封棉。
在一些实施例中，如图3、图9和图10所示，该燃气热水器还可以包括密封圈172，风机系统160的烟管161贯穿底壳100的顶板，密封圈172套设在烟管161外，且密封圈172夹持在烟管161与底壳100的顶板之间，这样可封堵烟管161与底壳100之间的间隙，断绝该处噪音向外直接传播的路径。
该密封圈172可以包括两段外径不同的子段，这样在密封圈172的外部形成阶梯面，在安装时，将外径较短的子段伸入底壳100的通孔，将阶梯面止抵于底壳100的顶板，可形成多个面结合的密封结构，隔音效果更好。
该密封圈172可以为硅胶材质，硅胶材质的密封圈172耐高温，可延长密封圈172在烟管161处的高温环境下的老化时间。
如图9和图10所示，本申请实施例的燃气热水器包括：底壳100、燃烧器140和盖板组件。
如图9所示，燃气热水器还可以包括换热器150。
燃气热水器可以为自然进气式和强排式，对于强排式燃气热水器，还可以包括风机系统160，风机系统160可以如图9所示，安装于换热器150上端。
盖板组件安装于底壳100，且盖板组件遮盖敞口，盖板组件可以位于底壳100的前端。
如图9-图14所示，盖板组件包括第一盖板310和第二盖板320。即该燃气热水器的前端至少为双层盖板结构。
第二盖板320位于燃烧器140与第一盖板310之间，底壳100、第二盖板320、第一盖板310从后到前顺次布置。
这样，该燃气热水器的工作噪音在向前传递时，需要至少穿过第二盖板320和第一盖板310，第二盖板320和第一盖板310可反射绝大部分直接向外传递的工作噪音，第二盖板320和第一盖板310可阻断噪音的直射途径。
如图11所示，盖板组件具有进气道330，进气道330位于第一盖板310与第二盖板320之间，第一盖板310与第二盖板320限定出该进气道330。
如图9、图11和图12所示，第一盖板310设有第一进风口311，第一进风口311与进气道330连通，第一进风口311可以为开设在第一盖板310上的通孔，该通孔贯穿第一盖板310。
如图9和图12所示，第一进风口311可以包括开设在第一盖板310上的多个通孔，通孔的形状可以有多种，包括但不限于：平行四边形、三角形、圆形和其他多边形等。
第一进风口311的多个通孔可以沿进气道330的中轴线对称布置，这样进气均衡，可以提高进气道330内气流的平顺程度。比如在如图9和图12所示的实施例中，第一进风口311包括位于中心的三角形通孔和镜像分布在三角形通孔两侧的多个平行四边形通孔。
第二盖板320设有第二进风口321，第二进风口321连通进气道330与燃烧器140的进气口。如图9和图11所示，第二进风口321在第二盖板320背离第一进风口311的位置。比如，在第一进风口311位于第一盖板310下部的情况下，第二进风口321设于第二盖板320的上部；在第一进风口311位于第一盖板310上部的情况下，第二进风口321设于第二盖板320的下部。这样进气道330的长度足够长。
第一盖板310和第二盖板320可以为钣金结构，这样盖板组件的防火性能和防护性能都较强。
进气道330的主要作用是将外界空气引入燃烧器140，但是燃气热水器的工作噪音也会通过进气道330向外传播。本申请实施例的燃气热水器，通过至少双盖板设计，可大幅度增加噪音沿进气道330向外传播的路径长度，增幅大于500％，有效提高噪音向外传播的传递损失。
相关技术中，也设计过一些结构来则延长进气通道，但是均是通过管道式结构，一方面由于燃气热水器整机体积的限制，长度增幅有限，另一方面，延长的进气通道流通截面积小，反而会产生进气噪音。
本申请实施例的燃气热水器，通过至少双盖板设计，在盖板之间形成进气道330，进气道330的宽度与整机宽度相当，可增大进气道330的流通截面积，且进气道330为直线型，流道阻力小，截面面积差异小，流道内流场流动均匀、进气流动速度梯度小，产生的湍流噪音小，可基本消除进气噪音，且进气压力基本无损失，不影响燃烧器140的燃烧效率。
另外，相关技术中，进气孔均设置在整机背部，而将整机安装于墙体后，进气孔与墙体的距离近，一般仅有10mm～20mm，流道阻力大。
本申请实施例的燃气热水器，将第一进风口311设于整机前部，进气不会受到外部结构的阻挡，可大幅降低进气道330的进气阻力，经试验计算，整体流道阻力降低70％。
根据本申请实施例的燃气热水器，通过设置多层盖板结构，每层盖板都会对内部噪音起到削弱作用，增强了隔音效果，且利用盖板之间的空腔形成较长较宽的进气道330，可大幅度增加噪音沿进气道330向外传播的路径长度，有效提高噪音向外传播的传递损失，可基本消除进气噪音，大幅降低流道阻力。
在一些实施例中，如图9所示，燃烧器140安装于底壳100的下部区域，第一进风口311位于第一盖板310的上部区域，第二进风口321位于第二盖板320的下部区域。
这样进气道330的长度基本与整机的高度相当，可大幅度增加噪音沿进气道330向外传播的路径长度，且外部的第一进风口311位于顶端，当将整机安装于墙体时，第一进风口311基本会处于房间内靠近房顶的区域，不会对用户带来风感，使用体验更好。
在一些实施例中，第一进风口311的流通截面积为P1，第二进风口321的流通截面积为P2，满足：1.5≤P2/P1≤3。
可以理解的是，将位于内部的第二进风口321设计为流通截面积大于位于外部的第一进风口311，可消除由于进气道330带来的流道阻力，进一步降低进气道330内的湍流噪音，且防止第二进风口321处产生声啸。比如，在一些实施例中，P2/P1＝2，或者P2/P1＝2.5。
在实际的设计中，可根据燃气热水器的最大负荷，调整第一进风口311的流通截面积，燃气热水器的最大负荷越大，第一进风口311的流通截面积也越大，以保证燃烧器140内的燃气可充分燃烧。燃气热水器的最大负荷可以为25kW、30kW或34kW等，第一进风口311的流通截面积P1可以介于2000mm2～3500mm2之间，比如P1＝2500mm2。
在一些实施例中，如图10和图13所示，第二进风口321可以包括第一通孔组322和第二通孔组323。第一通孔组322设于靠近燃烧器140的一次进气口的位置，第二通孔组323设于靠近燃烧器140的二次进气口的位置。
可以理解的是，燃烧器140包括一次进气口和二次进气口，一次进气口与燃烧器140的燃气进气通道连通，依靠高速通过的燃气产生的负压吸入空气，二次进气口直接引入空气，通过为一次进气口和二次进气口独立设计用于进气的第一通孔组322和第二通孔组323，可改善一次进气和二次进气的流量占比，帮助燃烧器140获得更好的燃烧效果，降低烟气中的CO等有害气体含量。
比如，图9和图10所示的实施例中的燃烧器140的一次进气口在右侧，二次进气口在底部，对应地，设计了如图10所示的第一通孔组322和第二通孔组323，第一通孔组322位于右侧，第二通风组位于左侧，且第一通风组的长度更长，向上延伸的更多，以适配一次进气口。
第一通孔组322和第二通孔组323中通孔的形状可以有多种，比如在图10所示的实施例中，第一通孔组322和第二通孔组323可各自包括多个长条形通孔，第一通孔组322中各通孔的长度较第二通孔组323中各通孔的长度更长；在图13所示的实施例中，第一通孔组322和第二通孔组323可各自包括多个圆形通孔，第一通孔组322中各通孔的半径较第二通孔组323中各通孔的半径更大。
当然，第一通孔组322和第二通孔组323还可以设计为其他形状，比如多边形等。
在一些实施例中，第一通孔组322的流通截面积为A1，第二通孔组323的流通截面积为A2，满足：1≤A1/A2≤2。通过将第一通孔组322的流通截面积设计得更大，可增大一次进气的占比，有助于降低CO、NO等有害气体排放，在实际设计时，可根据具体燃烧情况，调整A1/A2的值，比如A1/A2＝1.5，或A1/A2＝1.8等。
在一些实施例中，如图11所示，第一盖板310设有朝向底壳100的侧围板312，侧围板312设有朝内弯折的翻边313，第二盖板320安装于翻边313背离底壳100的一侧。
在该实施例中，第二盖板320可安装于第一盖板310内，第二盖板320位于翻边313的前侧，这样，集成为一体的盖板组件更易安装，只需将第一盖板310安装于底壳100即可，比如通过卡扣或螺纹连接结构将第一盖板310的翻边313与底壳100装配在一起。
或者，还可以在第一盖板310的翻边313与底壳100的对接处安装密封结构，以防止噪音从底壳100与盖板组件之间的间隙传播出来。
当然，也可以将第二盖板320设计在第一盖板310外，如图12和图13所示，第二盖板320安装于第一盖板310后侧，在装配时，需将第二盖板320与底壳100连接，比如通过卡扣或螺纹连接结构将第二盖板320与底壳100连接。
或者，第二盖板320位于第一盖板310后侧，还可以在第二盖板320与底壳100的对接处安装密封结构，以防止噪音从底壳100与盖板组件之间的间隙传播出来。盖板组件与底壳100之间夹有密封垫171，密封垫171可封堵底壳100与第二盖板320之间的间隙，断绝该处噪音向外直接传播的路径。密封垫171的形状可以与底壳100的外周类似，比如为四方环形。密封垫171可以为密封棉。
本申请实施例的燃气热水器还就可以包括其他消音部件200，该消音部件200可安装于进气道330内。如图9、图10和图14所示，进气道330内设有消音部件200，消音部件200安装于第二盖板320和第一盖板310中的至少一个。消音部件200沿前后方向的厚度小于进气道330沿前后方向的厚度，这样可留有足够的通道供进气流通。
第一盖板310和第二盖板320本身可反射绝大部分直接向外传递的工作噪音，结合在进气道330内布置的消音部件200，一部分噪音被第二盖板320反射，穿透第二盖板320的噪音中的大部分会被消音部件200吸收，剩余的少量噪音再被第一盖板310反射，消音效果更好。
消音部件200可以通过多种方式安装于第二盖板320或第一盖板310，包括粘贴、卡接或螺纹连接等。
消音部件200可以有多种结构形式，下面分别从四种不同的结构形式，对本申请实施例进行具体说明。
一、消音部件200为吸音棉
在该实施方式中，在进气道330内设有吸音棉，吸音棉可粘贴于第一盖板310或第二盖板320，且吸音棉沿前后方向的厚度可小于进气道330沿前后方向的宽度，这样可留出足够大的进气通道，以降低进气阻力。
吸音棉可以包括多个参数不同的区域，这些多个区域沿与前后方向垂直的方向分布，该参数包括容重和厚度中的至少一个。这样，不同的区域的吸音效果不同，可根据燃气热水器的各个部位的不同噪音特性，设计吸音棉的不同区域的参数。
消音部件200包括多个区域，多个区域在前后方向上分别对应底壳100的不同位置，消音部件200在至少两个区域的吸音参数不同。
发明人经过研究发现，燃气热水器正常工作的噪音来源包括：燃烧噪音、风机噪音、燃气喷射噪音、机械振动噪音和水流噪音等。燃烧噪音具有明显的低频特性，穿透性强，风机和水泵噪音具有明显的高频特性，尖锐刺耳，听觉感受差。
通过设置吸音参数不同的多个区域，可有针对性地消除各种噪音。
比如，吸音棉可以包括第一区域和第二区域，第一区域朝向燃烧器140和换热器150，优选地，第一区域朝向燃烧器140的燃烧室和换热器150；第二区域朝向风机系统160，此处的A朝向B指在前后方向上A和B的投影基本重合。
第一区域的容重大于第二区域的容重，或者第一区域的厚度大于第二区域的厚度。
二、消音部件200为多孔消音腔结构
在该实施方式中，消音部件200具有消音腔220，消音腔220朝向底壳100的壁面设有消音孔230。
如图14-图16所示，消音部件200包括基体210。
基体210朝向底壳100的表面(后表面)设有消音孔230，消音孔230连通至消音腔220。
在燃气热水器工作时，一部分噪音被第二盖板320反射，穿透第二盖板320的噪音中的大部分会通过消音孔230传播到消音腔220，通过在消音腔220内的多次反射，可被吸收，极少数噪音会被第一盖板310反射，整体消音效果更好。
如图16所示，消音腔220为多个，多个消音腔220呈阵列排布，每个消音腔220对应有呈阵列排布的多个消音孔230。
这样，各个区域的噪音都能通过消音孔230和消音腔220被吸收。
在一些实施例中，至少两个消音腔220的体积、至少两个消音腔220对应的消音孔230的流通截面积和至少两个消音腔220对应的消音孔230的密度中至少一种不同。
换言之，存在至少两个消音腔220的如下三个的参数中的至少一个不同：消音腔220的体积、消音孔230的流通截面积、消音腔220对应的消音孔230的密度，这样可针对燃气热水器的燃烧噪音、水流噪音和流致噪音的不同频率特性，有针对性地进行消音。
在一些实施例中，如图16-图17所示，朝向燃烧器140和换热器150的消音腔220的体积大于朝向风机系统160的消音腔220的体积。
发明人经过研究发现，燃气热水器正常工作的噪音来源包括：燃烧噪音、风机噪音、燃气喷射噪音、机械振动噪音和水流噪音等。燃烧噪音具有明显的低频特性，穿透性强，风机和水泵噪音具有明显的高频特性，尖锐刺耳，听觉感受差。
通过将朝向燃烧器140和换热器150的消音腔220的体积设计得更大，可更好地消纳低频噪音。
在一些实施例中，朝向燃烧器140和换热器150的消音腔220对应的消音孔230的数目少于朝向风机系统160的消音腔220对应的消音孔230的数目。通过将朝向风机系统160的消音腔220对应的消音孔230的数目设计得更多，可更好地消纳高频噪音。
在一个实施例中，如图17所示，基体210可以包括第一区域221和第二区域222，第一区域221朝向燃烧器140和换热器150，优选地，第一区域221朝向燃烧器140的燃烧室和换热器150；第二区域222朝向风机系统160，此处的A朝向B指在前后方向上A和B投影基本重合。
第一区域221对应的消音腔220的体积为V1，第一区域221对应的消音孔230的孔径为D1，第一区域221对应的每个消音腔220的对应的消音孔230的数目为N1，满足：60mm3≤V1≤455mm3，0.6mm≤D1≤2mm，50≤N1≤75；比如V1＝200mm3，D1＝1mm，N1＝66。这种形式的第一区域221可较好地消纳频率约为300Hz的噪音。
第二区域222对应的消音腔220的体积为V2，第二区域222对应的消音孔230的孔径为D2，第二区域222对应的每个消音腔220的对应的消音孔230的数目为N2，满足：10mm3≤V2≤80mm3，0.6mm≤D2≤2mm，76≤N2≤120；比如V1＝50mm3，D1＝1.2mm，N1＝99。这种形式的第二区域222可较好地消纳频率约为600Hz-800Hz的噪音。
三、消音部件200为迷宫式消音器
在该实施方式中，如图18-图21所示，消音部件200包括多个挡板240，挡板240的至少部分区域的法线与进气道330内的气流方向的夹角小于30°，多个挡板240之间间隔开用于供空气流通。
换言之，挡板240基本朝向第二进风口321与第一进风口311的连线的方向，这样，在噪音从第二进风口321想第一进风口311传递时，可被挡板240反射回去。
迷宫式消音器可使噪音在迷宫式流道内进行多次反射，消耗噪音的能量，达到降低噪音的目的，可大幅削弱通过进气道330向外传播的噪音。
如图18-图20所示，挡板240可以为弧形，且挡板240朝背离第一进风口311的方向弯曲。这样，挡板240反射的噪音基本都是朝向第二进风口321的，且挡板240对从第一进风口311到第二进风口321的进气阻力小。
如图18-图20所示，挡板240的数目和分布可以有多种形式。如图18所示，挡板240的长度短，数目多，且左右两侧对称布置；如图19所示，挡板240的长度长，数目少，且左右两侧对称布置；如图20所示，挡板240的长度长，数目少，且非对称布置。
当然，挡板240可以为平板形，如图21所示，挡板240为平板形，且多个挡板240之间间隔开用于供空气流通。
平板形的挡板240与弧形的挡板240也可混用。
在图18-图21所示的实施例中，消音部件200包括支撑板250，挡板240均安装于支撑板250，支撑板250再与盖板组件连接，比如支撑板250可粘贴于第一盖板310的内侧面。
四、消音部件200为上述多种结构的组合
比如，吸音棉和多孔消音腔结构的组合：朝向风机系统160的区域使用吸音棉，这样可更好地消纳在600Hz～1000Hz的中高频段噪音，朝向燃烧器140和换热器150的区域使用多孔消音腔结构，这样可更好地消纳在300Hz的低频段噪音。
其他组合形式再此就不再一一介绍。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。
以上实施方式仅用于说明本申请，而非对本申请的限制。尽管参照实施例对本申请进行了详细说明，本领域的普通技术人员应当理解，对本申请的技术方案进行各种组合、修改或者等同替换，都不脱离本申请技术方案的精神和范围，均应涵盖在本申请的权利要求范围中。

Claims (24)

  1. 一种燃气热水器的降噪装置，包括：
    基体，所述基体内设有沿所述基体的工作表面间隔分布的多个消音腔，且所述工作表面设有消音孔，每个所述消音腔均通过各自对应的所述消音孔与外界连通。
  2. 根据权利要求1所述的燃气热水器的降噪装置，其中，所述工作表面包括多个区域，至少两个所述区域对应的所述消音腔的体积、所述消音孔的流通截面积和所述消音孔的密度中至少一种不同。
  3. 根据权利要求2所述的燃气热水器的降噪装置，其中，多个所述消音腔沿所述工作表面呈阵列排布，每个所述消音腔对应有呈阵列排布的多个所述消音孔。
  4. 根据权利要求2所述的燃气热水器的降噪装置，其中，所述消音腔的体积V满足：10mm3≤V≤455mm3。
  5. 根据权利要求2所述的燃气热水器的降噪装置，其中，所述消音孔为圆形，且孔径D满足：0.6mm≤D≤2mm。
  6. 根据权利要求2所述的燃气热水器的降噪装置，其中，所述工作表面包括第一区域和第二区域；
    所述第一区域对应的所述消音腔的体积为V1，所述第一区域对应的所述消音孔的孔径为D1，所述第一区域对应的每个所述消音腔的对应的所述消音孔的数目为N1，满足：60mm3≤V1≤455mm3，0.6mm≤D1≤2mm，50≤N1≤75；
    所述第二区域对应的所述消音腔的体积为V2，所述第二区域对应的所述消音孔的孔径为D2，所述第二区域对应的每个所述消音腔的对应的所述消音孔的数目为N2，满足：10mm3≤V2≤80mm3，0.6mm≤D2≤2mm，76≤N2≤120。
  7. 根据权利要求2所述的燃气热水器的降噪装置，其中，体积不同的两个所述消音腔在所述工作表面的投影面积不相同。
  8. 根据权利要求1-7中任一项所述的燃气热水器的降噪装置，还包括：第一盖板和第二盖板，所述第一盖板和所述第二盖板限定出进气道，所述基体安装于所述进气道内。
  9. 根据权利要求1-7中任一项所述的燃气热水器的降噪装置，还包括：
    前盖板，所述基体安装于所述前盖板内侧，且所述工作表面为背离所述前盖板的表面。
  10. 一种燃气热水器，包括：
    底壳；
    安装于所述底壳的燃烧器、换热器和风机系统；
    如权利要求1-9中任一项所述的降噪装置，所述降噪装置至少位于所述换热器和所述风机系统的前侧。
  11. 一种燃气热水器，包括：
    底壳，所述底壳具有敞口；
    燃烧器，所述燃烧器安装于所述底壳；
    盖板组件，所述盖板组件安装于所述底壳，且遮盖所述敞口，所述盖板组件包括第一盖板和第二盖板，所述第二盖板位于所述燃烧器与所述第一盖板之间，所述盖板组件具有位于所述第一盖板与所述第二盖板之间的进气道，所述第一盖板设有连通所述进气道的第一进风口，所述第二盖板在背离所述第一进风口的位置设有第二进风口，所述第二进风口连通所述进气道与所述燃烧器的进气口。
  12. 根据权利要求11所述的燃气热水器，其中，所述第二进风口包括第一通孔组和第二通孔组，所述第一通孔组设于靠近所述燃烧器的一次进气口的位置，所述第二通孔组设于靠近所述燃烧器的二次进气口的位置。
  13. 根据权利要求12所述的燃气热水器，其中，所述第一通孔组的流通截面积为A1，所述第二通孔组的流通截面积为A2，满足：1≤A1/A2≤2。
  14. 根据权利要求11所述的燃气热水器，其中，所述第一进风口的流通截面积为P1，所述第二进风口的流通截面积为P2，满足：1.5≤P2/P1≤3。
  15. 根据权利要求11所述的燃气热水器，其中，所述燃烧器安装于所述底壳的下部区域，所述第二进风口位于所述第二盖板的下部区域，所述第一进风口位于所述第一盖板的上部区域。
  16. 根据权利要求11所述的燃气热水器，其中，所述第一盖板设有朝向所述底壳的侧围板，所述侧围板设有朝内弯折的翻边，所述第二盖板安装于所述翻边背离所述底壳的一侧。
  17. 根据权利要求11-16中任一项所述的燃气热水器，其中，所述进气道内设有消音部件，所述消音部件安装于所述第一盖板和所述第二盖板中的至少一个。
  18. 根据权利要求17所述的燃气热水器，其中，所述消音部件包括多个区域，所述多个区域在前后方向上分别对应所述底壳的不同位置，所述消音部件在至少两个所述区域的吸音参数不同。
  19. 根据权利要求17所述的燃气热水器，其中，所述消音部件具有消音腔，所述消音腔朝向所述底壳的壁面设有消音孔。
  20. 根据权利要求19所述的燃气热水器，其中，所述消音腔为多个，多个所述消音腔呈阵列排布，每个所述消音腔对应有呈阵列排布的多个所述消音孔。
  21. 根据权利要求20所述的燃气热水器，其中，至少两个所述消音腔的体积、至少两个所述消音腔对应的所述消音孔的流通截面积和至少两个所述消音腔对应的所述消音孔的密度中至少一种不同。
  22. [根据细则26改正 17.05.2023]
    根据权利要求17所述的燃气热水器，其中，所述消音部件包括多个挡板，所述挡板的至少部分区域的法线与所述进气道内的气流方向的夹角小于30°。
  23. 根据权利要求22所述的燃气热水器，其中，所述挡板为弧形，且朝背离所述第一进风口的方向弯曲。
  24. 根据权利要求11-16中任一项所述的燃气热水器，其中，所述盖板组件与所述底壳之间夹有密封垫。
PCT/CN2023/090549 2022-04-27 2023-04-25 燃气热水器的降噪装置和燃气热水器 WO2023207961A1 (zh)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN202210459508.2A CN117006695A (zh) 2022-04-27 2022-04-27 燃气热水器
CN202210459508.2 2022-04-27
CN202221024859.2 2022-04-27
CN202210459498.2 2022-04-27
CN202210459498.2A CN114992859A (zh) 2022-04-27 2022-04-27 燃气热水器的降噪装置和燃气热水器
CN202221024859.2U CN217236068U (zh) 2022-04-27 2022-04-27 燃气热水器

Publications (1)

Publication Number Publication Date
WO2023207961A1 true WO2023207961A1 (zh) 2023-11-02

Family

ID=88517732

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/090549 WO2023207961A1 (zh) 2022-04-27 2023-04-25 燃气热水器的降噪装置和燃气热水器

Country Status (1)

Country Link
WO (1) WO2023207961A1 (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205245564U (zh) * 2015-11-06 2016-05-18 广东万家乐燃气具有限公司 一种带消音功能的燃气热水器
CN109458736A (zh) * 2018-12-24 2019-03-12 广东美的白色家电技术创新中心有限公司 燃气热水器壳体及燃气热水器
CN112177982A (zh) * 2019-07-01 2021-01-05 青岛经济技术开发区海尔热水器有限公司 降噪风道及燃气热水器
CN212390609U (zh) * 2020-07-02 2021-01-22 佛山市顺德区声飞电器科技有限公司 一种室外燃气热水器
CN114234449A (zh) * 2021-12-25 2022-03-25 广东万和新电气股份有限公司 燃气热水器壳体以及燃气热水器
CN217236068U (zh) * 2022-04-27 2022-08-19 芜湖美的厨卫电器制造有限公司 燃气热水器
CN114992859A (zh) * 2022-04-27 2022-09-02 芜湖美的厨卫电器制造有限公司 燃气热水器的降噪装置和燃气热水器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205245564U (zh) * 2015-11-06 2016-05-18 广东万家乐燃气具有限公司 一种带消音功能的燃气热水器
CN109458736A (zh) * 2018-12-24 2019-03-12 广东美的白色家电技术创新中心有限公司 燃气热水器壳体及燃气热水器
CN112177982A (zh) * 2019-07-01 2021-01-05 青岛经济技术开发区海尔热水器有限公司 降噪风道及燃气热水器
CN212390609U (zh) * 2020-07-02 2021-01-22 佛山市顺德区声飞电器科技有限公司 一种室外燃气热水器
CN114234449A (zh) * 2021-12-25 2022-03-25 广东万和新电气股份有限公司 燃气热水器壳体以及燃气热水器
CN217236068U (zh) * 2022-04-27 2022-08-19 芜湖美的厨卫电器制造有限公司 燃气热水器
CN114992859A (zh) * 2022-04-27 2022-09-02 芜湖美的厨卫电器制造有限公司 燃气热水器的降噪装置和燃气热水器

Similar Documents

Publication Publication Date Title
CN113007070B (zh) 一种用于压缩机组隔声罩的进气消声器
CN101660353A (zh) 降噪室
WO2023207961A1 (zh) 燃气热水器的降噪装置和燃气热水器
CN217236068U (zh) 燃气热水器
CN114992859A (zh) 燃气热水器的降噪装置和燃气热水器
CN207993474U (zh) 一种片式阻性导流消声器
WO2024037333A1 (zh) 发动机消音结构
CN206571748U (zh) 一种高温消防排烟风机降噪箱
CN208012051U (zh) 一种建筑暖通气流消声器
CN101086382A (zh) 空气调节系统的风道
CN215109662U (zh) 一种离心式消防排烟风机
CN217236067U (zh) 燃气热水器
CN117006695A (zh) 燃气热水器
CN114234449A (zh) 燃气热水器壳体以及燃气热水器
CN117006694A (zh) 燃气热水器
CN220707668U (zh) 一种顶送风方管
CN216617643U (zh) 一种柴油发电机组尾气余热利用排烟消音装置
CN112360628B (zh) 静音发电机组
CN211041148U (zh) 具有降噪功能的变风量末端装置及空调系统
CN211082054U (zh) 一种散热效果良好的柴油发电机组消声罩
CN218563753U (zh) 一种柴油发电机组的静音箱
CN214175845U (zh) 一种变压器隔噪柜
CN219222868U (zh) 燃气热水器
CN213904930U (zh) 模块化金属共振消声弯头
CN216976212U (zh) 一种通气道

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23795393

Country of ref document: EP

Kind code of ref document: A1