Low-noise water heater shell with multiple layers of sound insulation plates and gas water heater

Abstract

The shell comprises a face shell body and a bottom shell body, the face shell body and the bottom shell body are fixedly connected in an attached mode to form an installation space, and a gas input device, a combustor, a heat exchanger, a draught fan and a smoke exhaust pipe can be sequentially arranged in the installation space from bottom to top. The rear end of the bottom shell is provided with an air inlet part which at least covers part of the fan, the air inlet part is provided with a plurality of air inlets, the inner side of the air inlet part is provided with a plurality of layers of sound insulation plates capable of prolonging the length of an air inlet path, the length of the air inlet path is prolonged through the sound insulation plates, and the working noise of the inner cavity is effectively prevented from being conducted out through convection.

Description

Technical Field

[0001] This application relates to the field of gas appliance technology, specifically to a multi-layer sound-insulating low-noise water heater shell and the field of gas water heater technology. Background Technology

[0002] Gas water heaters are relatively mature household products. As a result, in addition to achieving core functions such as safety, stable combustion, and precise temperature control, users are increasingly demanding noise control during use. Quiet design is becoming one of the important development directions for gas water heaters.

[0003] The noise generated during the operation of a gas water heater includes fan operation, combustion noise, and noise from the air intake and exhaust circulation, exhibiting diverse and complex characteristics. These noise sources often coexist and superimpose, causing the overall noise of the gas water heater to exhibit broadband and non-linear characteristics. Therefore, methods commonly used in the industry, such as wall-mounted sound-absorbing materials, optimized structural design, and the introduction of vibration-damping pads, are insufficient to solve the comprehensive noise problem. Summary of the Invention

[0004] In response to the above-mentioned needs, this application proposes a multi-layer sound insulation panel low-noise water heater shell and a gas water heater. The aim is to set up a multi-layer composite sound insulation structure inside the shell to lengthen the airflow path of the air inlet, effectively preventing the internal noise of the water heater from being transmitted out and causing discomfort to consumers.

[0005] To achieve the above objectives, the present application adopts the following technical solution:

[0006] In the first aspect, this application proposes a multi-layer sound insulation board low-noise water heater shell, including a front shell and a bottom shell, wherein the front shell and the bottom shell are fitted and fixedly connected to form an installation space, and a gas input device, a burner, a heat exchanger, a fan, and a flue pipe can be arranged sequentially from bottom to top in the installation space;

[0007] An air intake section covering at least part of the fan is provided at the rear end of the bottom shell. The air intake section has multiple air inlets, and the inner side of the air intake section is provided with a multi-layer sound insulation board that can extend the length of the air intake path.

[0008] In this way, by using an upper-mounted fan to enable the entire gas water heater to burn under negative pressure, it is beneficial for external air to flow naturally into the combustion chamber, ensuring the stability of the combustion process. At the same time, by placing the air inlet above the fan, external cold air will flow naturally into the combustion chamber from top to bottom, forming a stable convection circulation with the hot air, improving the stable operation of the combustion system and reducing the overall operating noise.

[0009] At the same time, by extending the air intake path length through multi-layer sound insulation panels, the working noise of the inner cavity is effectively prevented from being transmitted out through convection.

[0010] In some possible implementations, the sound insulation panel is a two-layer sound insulation panel.

[0011] In some possible implementations, the air inlet of the air intake is located in the middle, and the sound insulation plate includes a first sound insulation plate and a second sound insulation plate arranged sequentially in the air intake direction. The first sound insulation plate has air inlets on the left and right sides, and the second sound insulation plate is a flat plate structure.

[0012] In some possible implementations, the first soundproofing panel is provided with a buckle for positioning with the bottom shell and is fixed around the perimeter, and the upper and lower ends of the second soundproofing panel are fixed to the first soundproofing panel.

[0013] In some possible implementations, the air inlets of the air intake are located at both ends, and the sound insulation plate includes a first sound insulation plate and a second sound insulation plate arranged sequentially in the air intake direction. The first sound insulation plate has an air inlet in the middle, and the second sound insulation plate has air inlets on both sides.

[0014] In some possible implementations, the first sound insulation panel is provided with a buckle for positioning with the bottom shell and is fixed around the perimeter, and the second sound insulation panel is provided with a buckle for positioning with the bottom shell and is fixed around the first sound insulation panel.

[0015] In some possible implementations, the air intake is an outwardly protruding structure with a flange on its side.

[0016] In some possible implementations, the air inlet of the air intake extends to the flange at both ends of the air intake.

[0017] Secondly, this application proposes a gas water heater using a multi-layer sound insulation board low-noise water heater shell as described above, wherein the front shell is provided with an inner extension ring corresponding to the bottom shell, the bottom shell is provided with a support edge corresponding to the front shell, and the support edge is provided with sound insulation cotton.

[0018] In some possible implementations, a sealing ring is also included at the exhaust port. Attached Figure Description

[0019] Figure 1 This is a partial internal view of the gas water heater described in this application;

[0020] Figure 2 This is an exploded view of the multi-layer sound insulation panel shell of Embodiment 1 of this application;

[0021] Figure 3 This is a rear view of the rear shell of Embodiment 1 of this application;

[0022] Figure 4 This is an internal view of the rear shell of Embodiment 1 of this application;

[0023] Figure 5 yes Figure 4 Sectional view at point AA;

[0024] Figure 6 This is an exploded view of the multi-layer sound insulation panel shell of Embodiment 2 of this application;

[0025] Figure 7 This is a rear view of the rear shell of Embodiment 2 of this application;

[0026] Figure 8 This is an internal view of the rear shell of Embodiment 2 of this application;

[0027] Figure 9 yes Figure 8 Sectional view at point BB;

[0028] Figure 10 This is a schematic diagram of the explosion of the rear shell, front shell, and sound insulation cotton;

[0029] Figure 11 yes Figure 10 Enlarged view of a portion of point C in the middle;

[0030] Figure 12 This is an internal view of the shell. Detailed Implementation

[0031] The following examples further illustrate the features of this application and other related features in detail, to facilitate understanding by those skilled in the art:

[0032] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions in the attached diagrams, while the terms “bottom surface,” “top surface,” “inner,” and “outer” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0033] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this case based on the specific circumstances.

[0034] First, a detailed explanation of the noise generated during the operation of a gas water heater is provided. This includes at least the noise from the fan, combustion, and air intake / exhaust circulation, exhibiting a variety of complex characteristics. For example, the pulsating vibrations caused by gas expansion during combustion generate mid-to-high frequency combustion noise. The fan, as a key component, provides combustion air and exhausts waste gas; its rotating blades and airflow disturbances also contribute to significant aerodynamic and mechanical noise. Furthermore, the flow of air in the ducts during intake and exhaust can induce eddies and resonance, causing wind noise.

[0035] Therefore, the noise problem of gas water heaters is a complex issue that is difficult to improve through a single optimization. One possible approach is to prevent the noise generated inside the water heater from being transmitted outside, which means effectively soundproofing the entire internal cavity of the gas water heater.

[0036] Please refer to the following for details. Figure 1 and Figure 2 The gas water heater casing involved in this application includes a front shell 1 and a bottom shell 2. The front shell 1 and the bottom shell 2 are fitted and fixedly connected to form an installation space. The fixed connection can adopt the snap-fit ​​method commonly used in sheet metal. Within the installation space, a gas input device 3, a burner 4, a heat exchanger 5, a fan 6, and an exhaust pipe 7 can be arranged sequentially from bottom to top. At this time, the exhaust fan 6 is in the upper position, allowing the entire gas water heater to burn under negative pressure, which facilitates the natural flow of external air into the combustion chamber and ensures the stability of the combustion process. The gas input device 3 mainly refers to the gas inlet, gas proportional valve, segmented solenoid valve, and other components that input gas into the gas water heater. It should be noted that this description mainly focuses on the position of the fan 6 and describes the positional relationship of some combustion-related components of the gas water heater. Other system operating components such as the controller and water pump are not all listed, as their application is a common industry technique and will not be elaborated upon in this application.

[0037] An air intake section 21, which covers at least part of the fan 6, is provided at the rear end of the bottom shell 2. The air intake section 21 has multiple air inlets 100, and a multi-layer sound insulation plate 22, which extends the air intake path length, is provided on the inner side of the air intake section 21, that is, in the direction facing the interior of the bottom shell 2. In the following description, the designation and description of the air inlets 100 will also be used. It can adopt a louvered opening design, which is mainly for drawing air from the outside of the gas water heater. When it is installed on other components, it will also be referred to as air inlet 100.

[0038] In this way, by positioning the air inlet 100 above the fan 6, external cold air will naturally flow from top to bottom into the combustion chamber of the burner 4, forming a stable convection circulation with the hot air, improving the stable operation of the combustion system and reducing overall operating noise. At the same time, by extending the air intake path length through the multi-layer sound insulation panel 22, the operating noise of the internal cavity is effectively prevented from being transmitted out through convection.

[0039] Please refer to the reference. Figures 10 to 12As a sound insulation measure to prevent the transmission of operating noise, an inner extension ring 11 is provided on the front shell 1 and a support edge 23 is provided on the bottom shell 2 at the joint where the front shell 1 and bottom shell 2 meet. The support edge 23 is an L-shaped rim that is recessed toward the inner cavity of the bottom shell 2. Sound insulation cotton 8 is provided on the support edge 23 and is adhered to the support edge 23 to form a contact surface with the inner extension ring 11 of the front shell 1. When the front shell 1 and bottom shell 2 are fixedly connected, the sound insulation cotton 8 will be squeezed, effectively preventing the noise inside the gas water heater from being transmitted out.

[0040] Please refer to the reference. Figure 6 and Figure 10 The sealing ring 9 at the smoke exhaust port, which is the hole through which the smoke exhaust pipe 7 exits from the bottom shell 2, further improves the sound insulation effect.

[0041] In a preferred embodiment, the sound insulation panel 22 consists of two layers. The method by which it extends the air intake path length is described in detail below.

[0042] Example 1, please refer to Figures 2 to 5 The air inlet 100 of the air inlet 21 is located in the middle of the air inlet 21. In a preferred embodiment, the air inlet 21 has an outwardly protruding structure. Further, the sound insulation plate 22 includes a first sound insulation plate 221 and a second sound insulation plate 222 arranged sequentially along the air intake direction. In this embodiment, the first sound insulation plate 221 has air inlets 100 on both its left and right sides, while the second sound insulation plate 222 has a flat plate structure. In this case, the air intake direction is from the middle of the air inlet 21, then diffuses to the air inlets 100 on both sides of the first sound insulation plate 221, and then enters the gas water heater through the sides of the flat plate structure of the second sound insulation plate 22, effectively extending the air intake path length.

[0043] Specifically, the sound insulation panel 22 is fixed by a slot 241 at the lower end of the air inlet 21 of the bottom shell 2, and a buckle 242 corresponding to the slot 241 at the bottom of the first sound insulation panel 221. The first sound insulation panel 222 is positioned on the bottom shell 2 by the buckle 242 and fixed around the perimeter. The fixing method can be tightening with screws. The left and right ends of the second sound insulation panel 222 are open air outlets, so it is fixed to the first sound insulation panel 221 at its upper and lower ends.

[0044] Example 2, please refer to Figures 6 to 9 In this embodiment, the air intake 21 has air inlets 100 at both ends. In a preferred embodiment, the air intake 21 has an outwardly protruding structure with flanges 211 formed on its sides. At this time, the air inlets 100 of the air intake 21 extend to the flanges 211 at both ends of the air intake 21, presenting a three-dimensional multi-faceted air intake structure.

[0045] Furthermore, a first sound insulation panel 221 and a second sound insulation panel 222 are sequentially arranged along the air intake direction. The first sound insulation panel 221 has an air intake 100 in the middle, while the second sound insulation panel 222 has air intakes 100 on both sides. In this way, after the air enters from both sides of the air intake section 21, it will converge in the middle of the first sound insulation panel 221 and diffuse to both sides of the second sound insulation panel 222, effectively extending the air intake path length.

[0046] Specifically, the sound insulation panel 22 is fixed by a slot 241 at the lower end of the air intake 21 of the bottom shell 2, and a buckle 242 corresponding to the slot 241 at the bottom of the first sound insulation panel 221. The first sound insulation panel 221 is positioned in the bottom shell 2 by the buckle 242 and fixed around the perimeter. The fixing method can be tightening with screws. Similarly, the second sound insulation panel 222 is also provided with a buckle 242 at the bottom, which is used to position it in the bottom shell 2 and fix it to the first sound insulation panel 221 around the perimeter.

[0047] As stated above, this case protects a multi-layered soundproof low-noise water heater casing and a gas water heater. All technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.

Claims

1. A multi-layer sound-insulating low-noise water heater casing, characterized in that, It includes a front shell (1) and a bottom shell (2), the front shell (1) and the bottom shell (2) are fitted and fixedly connected to form an installation space, and a gas inlet (3), a burner (4), a heat exchanger (5), a fan (6) and a flue pipe (7) can be arranged in the installation space from bottom to top; An air intake (21) covering at least part of the fan (6) is provided at the rear end of the bottom shell (2). The air intake (21) is provided with multiple air inlets (100). The inner side of the air intake (21) is provided with a multi-layer sound insulation plate (22) that can extend the length of the air intake path.

2. The multi-layer sound-insulating low-noise water heater casing as described in claim 1, characterized in that, The sound insulation board (22) is a two-layer sound insulation board (22).

3. The multi-layer sound-insulating low-noise water heater casing as described in claim 2, characterized in that, The air inlet (100) of the air intake section (21) is located in the middle. The sound insulation plate (22) includes a first sound insulation plate (221) and a second sound insulation plate (222) arranged sequentially in the air intake direction. The first sound insulation plate (221) has air inlets (100) on the left and right sides, and the second sound insulation plate (222) is a flat plate structure.

4. The multi-layer sound-insulating low-noise water heater casing as described in claim 3, characterized in that, The first sound insulation panel (221) is provided with a buckle (242) for positioning with the bottom shell (2) and is fixed around the perimeter. The upper and lower ends of the second sound insulation panel (222) are fixed to the first sound insulation panel (221).

5. The multi-layer sound-insulating low-noise water heater casing as described in claim 2, characterized in that, The air inlet (100) of the air intake section (21) is provided at both ends. The sound insulation plate (22) includes a first sound insulation plate (221) and a second sound insulation plate (222) arranged sequentially in the air intake direction. The first sound insulation plate (221) has an air inlet (100) in the middle, and the second sound insulation plate (222) has air inlets (100) on both sides.

6. The multi-layer sound-insulating low-noise water heater casing as described in claim 5, characterized in that, The first sound insulation panel (221) is provided with a buckle (242) for positioning with the bottom shell (2) and is fixed around the perimeter. The second sound insulation panel (222) is provided with a buckle (242) for positioning with the bottom shell (2) and is fixed around the first sound insulation panel (221).

7. The multi-layer sound-insulating low-noise water heater casing as described in claim 5, characterized in that, The air intake (21) is an outwardly protruding structure with a flange (211) on its side.

8. The multi-layer sound-insulating low-noise water heater casing as described in claim 7, characterized in that, The air inlet (100) of the air intake (21) extends to both ends of the air intake (21) to the flange (211).

9. A gas water heater, characterized in that, The low-noise water heater housing with multi-layer sound insulation board as described in any one of claims 1 to 8 is provided with an inner extension ring (11) at the position of the front shell (1) corresponding to the bottom shell (2), and a support edge (23) at the position of the bottom shell (2) corresponding to the front shell (1), and the support edge (23) is provided with sound insulation cotton (8).

10. A gas water heater as described in claim 9, characterized in that, It also includes a sealing ring (9) installed at the smoke exhaust port.

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