Gas-collecting hood assembly and gas water heater

Abstract

The utility model provides a gas-collecting hood assembly and a gas water heater, the gas water heater is arranged in the gas water heater, the gas water heater comprises a combustion chamber, the gas-collecting hood assembly comprises a hood body, a fan assembly and an air uniformizing plate, the hood body comprises a first air inlet and a first air outlet, and the caliber of the first air inlet is larger than that of the first air outlet. The first air inlet is covered with the air uniformizing plate, the air uniformizing plate comprises a first area right facing the first air outlet and a second area except the first area, the first area and the second area are each provided with a plurality of air inlet holes, and the air inlet amount of the first area is larger than that of the second area. The caliber of the first air inlet is larger than that of the first air outlet, airflow can be guided, the fan assembly pushes the airflow to pass through the air uniformizing plate and the gas collecting hood, oxygen in the first area is more, the air quantity passing through the air uniformizing plate can be controlled by changing the sizes of the air inlet holes in the first area and the second area, and combustion in the combustion chamber is more sufficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a smoke exhaust technology field, especially in a kind of gas hood assembly and gas water heater. BACKGROUND

[0002] The more common heat exchanger on market is generally divided into two ways of upper extraction and lower drum, and the upper extraction type is fan upper, and the way of air extraction exhausts air, and the lower drum type is fan in lower end, and the way of air blowing exhausts air.The fan of the upper extraction type water heater adopts high-power fan, and the impeller and the speed of fan are relatively high, thus relatively large noise is generated. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem that the fan noise of the water heater in the prior art is too large, and provides a gas hood assembly and a gas water heater.

[0004] The utility model solves the above technical problem by the following technical scheme:

[0005] A kind of gas hood assembly is arranged in gas water heater, and gas water heater includes combustion chamber, and the gas hood assembly includes cover body, fan assembly and air distribution plate, cover body includes first air inlet and first air outlet, the caliber of first air inlet is greater than the caliber of first air outlet, air distribution plate covers first air inlet, air distribution plate includes first area opposite first air outlet and second area except first area, first area and second area are each provided with several air inlets, and the air intake of first area is greater than the air intake of second area.

[0006] In the scheme, cover body includes first air inlet and first air outlet, the caliber of first air inlet is greater than the caliber of first air outlet, which helps to guide airflow, fan assembly is communicated with first air outlet to form gas flow path, fan assembly can be used to push airflow through air distribution plate and gas hood, thereby improving air flow in combustion chamber, airflow entering cover body can be discharged from first air outlet at higher speed, air distribution plate covers first air inlet, for controlling the distribution of airflow, air distribution plate is divided into two areas, first area is opposite first air outlet, and is provided with several air inlets, allowing more airflow to pass through, second area is located in other parts except first area, and is also provided with several air inlets, but the air intake is less than first area, first area has more oxygen, and the air volume passing through air distribution plate can be controlled by changing the size of air inlet in first area and second area, so that the combustion of combustion chamber is more sufficient.

[0007] Preferably, the air inlet of first area is provided with first flange, first flange extends towards first air outlet by preset length, and the air inlet located in second area is provided with second flange, and second flange extends towards first air outlet by preset length.

[0008] In the scheme, the first flange can enhance the air flow guidance, so that the air flow is more stable and smooth, the existence of the first flange helps to concentrate and guide more air flow to the first air outlet, increases the amount of air passing through the first area, so that more oxygen is obtained in the combustion chamber. The second flange helps to guide the air flow of the second area to flow in the direction of the first air outlet, improving the uniformity of the overall air flow distribution. Although the air inlet amount of the second area is smaller than that of the first area, through the guidance of the flange, the balanced distribution of the air flow is ensured, avoiding the situation that the local air flow in the combustion chamber is too strong or too weak.

[0009] Preferably, the size of the air inlet hole located in the first area is not less than the size of the air inlet hole located in the second area; and / or, the number of air inlet holes located in the first area is not less than the number of air inlet holes located in the second area.

[0010] In the scheme, the size or number of air inlet holes located in the first area is greater than or equal to that of the second area, so that more air flow can pass through the first area closer to the fan assembly, increasing the oxygen supply in the combustion chamber, optimizing the air flow distribution, thereby promoting the full combustion of gas and improving the combustion efficiency.

[0011] Preferably, the gas collecting cover assembly further comprises an adapter plate, the adapter plate is provided with a first through hole, the first air outlet is provided with a third flange, the third flange extends towards the direction away from the cover body by a predetermined length, the adapter plate is connected with the cover body and the first through hole is sleeved on the third flange.

[0012] In the scheme, the design of the third flange helps to more concentratedly and orderly guide the air flow out of the cover body, improves the stability and flow efficiency of the air flow, and can reduce the turbulence phenomenon of the air flow at the connection between the adapter plate and the cover body, thereby reducing the noise; the adapter plate is sleeved on the third flange through the first through hole, which enhances the connection strength and stability, and improves the durability and reliability of the assembly.

[0013] Preferably, the cross section of the cover body is triangular, the side of the cover body facing the adapter is provided with a plurality of first connection holes, the plurality of first connection holes are uniformly and spacedly arranged on the cover body along the circumference of the first air outlet, and the first connection hole extends towards the cover body by a predetermined length; the adapter plate is provided with a plurality of second connection holes which are the same in number as the first connection holes, the second connection holes extend towards the first connection holes by a predetermined length, and the first connection hole is sleeved on the second connection hole.

[0014] In the scheme, the triangular cover body provides good structural stability, so that the cover body is more stable when stressed and is not easy to deform, and the larger end of the cover body can better extract gas. The shape of the gas collection cover is slowly folded, and the wind entering its interior is also slowly folded. The wind is avoided from colliding on the inner surface of the gas collection cover, reducing noise. The plurality of first connecting holes and second connecting holes are uniformly spaced, so that the adapter plate and the cover body are evenly stressed when connected. The two protrusions of the first connecting hole and the second connecting hole overlap together, which helps to hide the connection points of the two, reducing contact with the airflow.

[0015] Preferably, the gas collection cover assembly further comprises a screw for connecting the adapter plate and the cover body through the first connecting hole and the second connecting hole.

[0016] In the scheme, the screw connection design is added in the gas collection cover assembly, providing a reliable mechanical fixing method, further improving the connection reliability and stability of the assembly, and facilitating disassembly. The screw arranged in the first connecting hole and the second connecting hole is well hidden in the gas collection cover, reducing its collision with the flowing gas.

[0017] Preferably, a limiting flange is further arranged on the adapter plate, and the gas collection cover assembly further comprises a fan assembly in communication with the adapter plate. The fan assembly comprises a fan shell, the limiting flange is sleeved outside the shell, and a gap space exists between the limiting flange and the outer edge of the shell.

[0018] In the scheme, the limiting flange provides an additional positioning function, making the installation of the fan assembly and the adapter plate more stable and accurate. The gap space can absorb part of the vibration, reducing the vibration and noise when the fan is running, and improving the user experience.

[0019] Preferably, the gas collection cover assembly further comprises an anti-backflow assembly connected with the fan assembly. The anti-backflow assembly comprises an anti-backflow cylinder, an elbow connecting pipe and an anti-backflow piece. The anti-backflow piece is arranged in the anti-backflow cylinder. One end of the elbow connecting pipe is in communication with the fan assembly, and the other end is in communication with the anti-backflow cylinder. The anti-backflow piece is arranged at the end of the anti-backflow cylinder away from the elbow connecting pipe.

[0020] In the scheme, the anti-backflow piece can effectively prevent external airflow from flowing back into the fan assembly, so that the airflow flows in one direction. The design of the elbow connecting pipe facilitates the connection between the anti-backflow assembly and the fan assembly, helps to optimize the airflow path, guides the airflow to smoothly pass through the fan assembly and the anti-backflow cylinder, and improves the airflow circulation efficiency.

[0021] Preferably, the elbow connecting pipe comprises two elbow components and a connecting agent. The elbow component comprises a groove and a convex edge. The groove of one elbow component is connected and fixed with the convex edge of the other elbow component. The two elbow components are connected by the connecting agent to form the elbow connecting pipe.

[0022] In the scheme, the two-piece design of the elbow pipe realizes the firm connection between the two-piece elbow pipe components through the cooperation of the groove and the convex edge, improves the strength and stability of the overall structure. Through the modular design, the elbow pipe components can be manufactured and detected separately, and then assembled through a simple connection operation, which simplifies the manufacturing and assembly process and improves the production efficiency. The connecting agent is filled in the gap between the groove and the convex edge, improves the air tightness of the connection, prevents gas leakage, and improves the combustion efficiency.

[0023] A gas water heater, the gas water heater comprises the gas collecting cover assembly as described above.

[0024] In the scheme, by introducing the above-mentioned design of the gas collecting cover assembly in the gas water heater, the gas water heater can realize more efficient, stable and safe operation effect, reduce noise, and provide users with better use experience.

[0025] The positive progress effect of the utility model lies in:

[0026] The cover body comprises a first air inlet and a first air outlet, the caliber of the first air inlet is larger than that of the first air outlet, which helps to guide airflow, and a fan assembly is in communication with the first air outlet to form a gas flow path, the fan assembly can be used to push airflow through the air uniforming plate and the gas collecting cover, thereby improving the air flowability in the combustion chamber, the airflow entering the cover body can be discharged from the first air outlet at a higher speed, the air uniforming plate covers the first air inlet and is used for controlling the distribution of airflow, the air uniforming plate is divided into two regions, the first region is opposite to the first air outlet and is provided with a plurality of air inlet holes to allow more airflow to pass through, the second region is located in other parts except the first region and is also provided with a plurality of air inlet holes, but the air inlet amount is smaller than that of the first region, the first region has more oxygen, and the air amount passing through the air uniforming plate can be controlled by changing the size of the air inlet holes in the first region and the second region, so that the combustion in the combustion chamber is more sufficient. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a three-dimensional structure schematic view of the gas collecting cover assembly of the utility model embodiment;

[0028] Figure 2 It is Figure 1 an exploded structure schematic view;

[0029] Figure 3 It is Figure 1 a top view;

[0030] Figure 4 It is Figure 1 a side view;

[0031] Figure 5 It is a three-dimensional structure schematic view of the cover body in the utility model embodiment;

[0032] Figure 6 It is the three-dimensional structure schematic view of the adapter plate in one embodiment of the utility model;

[0033] Figure 7 It is the structure schematic view of another angle of Figure 6

[0034] Figure 8 It is the three-dimensional structure schematic view of the fan assembly in one embodiment of the utility model;

[0035] Figure 9 It is the structure schematic view of another angle of Figure 8

[0036] Figure 10 It is the three-dimensional structure schematic view of the air equalizing plate in one embodiment of the utility model;

[0037] Figure 11 It is the structure schematic view of another angle of Figure 10

[0038] Figure 12 It is the exploded structure schematic view of the anti-inversion assembly in one embodiment of the utility model;

[0039] Figure 13 It is the structure schematic view of the elbow pipe in one embodiment of the utility model;

[0040] Figure 14 It is the exploded view of Figure 13

[0041] Figure 15 It is the partial structure schematic view of the gas water heater in one embodiment of the utility model.

[0042] Mark explanation:

[0043] 100 gas collecting cover assembly

[0044] 110 cover body

[0045] 111 first air inlet

[0046] 112 first air outlet

[0047] 113 third flange

[0048] 114 first connecting hole

[0049] 120 air equalizing plate

[0050] 121 first area

[0051] 1210 first flange

[0052] 122 second area ​​​​

[0053] 1220 second flange

[0054] 123 air inlet hole

[0055] 130 adapter plate

[0056] 131 second connecting hole

[0057] 132 limiting flange

[0058] 133 first fan mounting hole

[0059] 134 through hole

[0060] 140 fan assembly

[0061] 141 fan impeller

[0062] 142 second fan mounting hole

[0063] 150 anti-backdraft assembly

[0064] 151 elbow pipe

[0065] 1512 convex edge

[0066] 1511 concave groove

[0067] 152 anti-backdraft cylinder

[0068] 153 anti-backdraft piece

[0069] 200 combustion chamber assembly

[0070] 300 heat exchanger assembly

[0071] A air flow path DETAILED DESCRIPTION

[0072] A preferred embodiment is described below in conjunction with the accompanying drawings so as to provide a clearer and more complete understanding of the present application.

[0073] As Figures 1-14 shown, the present application provides a hood assembly 100 in an embodiment, which is arranged in a gas water heater, the gas water heater comprising a combustion chamber assembly 200, the hood assembly 100 comprising a hood body 110, a fan assembly 140 and a uniform air distribution plate 120, the hood body 110 comprising a first air inlet 111 and a first air outlet 112, the caliber of the first air inlet 111 being larger than that of the first air outlet 112, the uniform air distribution plate 120 covering the first air inlet 111, the uniform air distribution plate 120 comprising a first region 121 opposite to the first air outlet 112 and a second region 122 except the first region 121, the first region 121 and the second region 122 both being provided with a plurality of air inlet holes 123, the air inlet amount of the first region 121 being greater than that of the second region 122.

[0074] In the present embodiment, the cover body 110 comprises a first air inlet 111 and a first air outlet 112, the caliber of the first air inlet 111 is larger than that of the first air outlet 112, which helps to guide the airflow, the fan assembly 140 is in communication with the first air outlet 112 to form a gas flow path, the fan assembly 140 can be used to push the airflow through the air distribution plate 120 and the gas collection cover, thereby improving the air flow in the combustion chamber assembly 200, the airflow entering the cover body 110 can be discharged from the first air outlet 112 at a higher speed, the air distribution plate 120 covers the first air inlet 111 and is used to control the distribution of the airflow, the air distribution plate 120 is divided into two areas, the first area 121 is directly opposite the first air outlet 112 and is provided with a plurality of air inlet holes 123 to allow more airflow to pass through, the second area 122 is located in other parts except the first area 121 and is also provided with a plurality of air inlet holes 123, but the air inlet amount is smaller than that of the first area 121, the first area 121 has more oxygen, the air volume passing through the air distribution plate 120 can be controlled by changing the size of the air inlet holes 123 in the first area 121 and the second area 122, etc., so that the combustion of the combustion chamber assembly 200 is more sufficient.

[0075] As shown in Figure 10 and Figure 11 , the size of the air inlet hole 123 located in the first area 121 is not less than that of the air inlet hole 123 located in the second area 122; the number of air inlet holes 123 located in the first area 121 can also be designed to be not less than the number of air inlet holes located in the second area 122. More airflow can pass through the first area 121 closer to the fan assembly 140, which increases the oxygen supply amount in the combustion chamber assembly 200 and optimizes the airflow distribution, thereby promoting the sufficient combustion of the gas and improving the combustion efficiency.

[0076] As shown in Figure 10 and Figure 11As shown, the air inlet of the first region 121 is provided with a first flange 1210 extending in a preset length towards the direction of the first air outlet 112, and the air inlet 123 of the second region 122 is provided with a second flange 1220 extending in a preset length towards the direction of the first air outlet 112. The first flange 1210 is arranged at a certain angle with the air distribution plate 120, and the opening thereof faces the direction of the first air outlet, which can guide the air flow from the air inlet 123 in the second region 122 to flow more directly to the first air outlet after reducing the diffusion collision in the air collecting cover. The first flange 1210 can enhance the air flow guidance, so that the air flow is more stable and smooth, and the existence of the first flange 1210 helps to concentrate and guide more air flow to the first air outlet 112, thereby increasing the air volume through the first region 121 and obtaining more oxygen in the combustion chamber assembly 200. The second flange 1220 helps to guide the air flow in the second region 122 to flow towards the direction of the first air outlet 112, thereby improving the uniformity of the overall air flow distribution. Although the air inlet volume of the second region 122 is smaller than that of the first region 121, through the guidance of the flange and the balanced distribution of the air flow, the situation of local air flow being too strong or too weak in the combustion chamber assembly 200 is avoided.

[0077] As shown in Figure 2 and Figures 6-7 The air collecting cover assembly 100 further comprises an adapter plate 130 provided with a first through hole 134, and the first air outlet 112 is provided with a third flange 113 extending in a preset length away from the cover body 110. The adapter plate 130 is connected with the cover body 110 and the first through hole 134 is sleeved on the third flange 113. The design of the third flange 113 helps to more concentrate and orderly guide the air flow out of the cover body 110, thereby improving the stability and flow efficiency of the air flow, and reducing the turbulence phenomenon of the air flow at the connection between the adapter plate 130 and the cover body 110, thereby reducing the noise; the adapter plate 130 is sleeved on the third flange 113 through the first through hole 134, thereby enhancing the connection strength and stability and improving the durability and reliability of the assembly.

[0078] As shown in Figures 2-7As shown, the cross section of the cover body 110 is triangular, the cover body 110 is provided with a plurality of first connecting holes 114 on the side facing the adapter, the plurality of first connecting holes 114 are uniformly and spacedly arranged on the cover body 110 along the circumference of the first air outlet 112, and the first connecting holes 114 extend towards the inside of the cover body 110 by a predetermined length; the adapter plate 130 is provided with a plurality of second connecting holes 131 which are the same in number as the first connecting holes 114, the second connecting holes 131 extend towards the first connecting holes 114 by a predetermined length, and the first connecting holes 114 are sleeved on the second connecting holes 131. The triangular cover body 110 provides good structural stability, so that the cover body 110 is more stable when stressed and is not easy to deform, the larger end of which can better extract gas, the shape of the gas collecting cover is slowly contracted, the wind entering its inside is also slowly contracted, avoiding the wind from colliding horizontally on the inner surface of the gas collecting cover, thereby reducing noise. The plurality of first connecting holes 114 and the plurality of second connecting holes 131 are uniformly and spacedly arranged, so that the adapter plate 130 and the cover body 110 are connected uniformly, and the two protrusions of the first connecting holes 114 and the second connecting holes 131 overlap together, which helps to hide the connection points of the two and reduces the contact with the airflow.

[0079] The gas collecting cover assembly 100 further comprises a screw which is used to connect the adapter plate 130 and the cover body 110 through the first connecting holes 114 and the second connecting holes 131. The first connecting holes 114 are screw hiding holes, the second connecting holes 131 on the connecting plate are screw holes which are provided in pairs with the screw hiding holes, the screw holes can be matched with the gas collecting cover body 110, the four protrusions around the first air outlet overlap together, the screw is screwed from below the gas collecting cover, and after the screw is locked, the screw does not protrude from the gas collecting cover body 110

[0080] As shown in Figure 2 and Figures 6-7 The adapter plate 130 is further provided with a limiting flange 132, the gas collecting cover assembly 100 further comprises a fan assembly 140 which communicates with the adapter plate 130, the fan assembly 140 comprises a fan shell, the limiting flange 132 faces the side of the fan assembly 140, and the limiting flange 132 is 1-2 mm larger than the outer edge of the volute of the fan assembly 140, the limiting flange 132 is sleeved on the outside of the shell, and there is a gap space between the limiting flange 132 and the outer edge of the shell, which facilitates fixing the fan assembly 140 after assembly, avoids the fan assembly 140 from moving, and facilitates installation of the screw and the like. The adapter plate 130 is provided with a first fan mounting hole 133 for fixing the fan assembly 140, the fan assembly 140 is provided with a second fan mounting hole 142 for connecting with the first fan mounting hole 133, the flange faces the side of the fan assembly 140, the cover body 110 is hidden in the gas collecting cover after being fixed with the connecting plate, the fan impeller 141 does not protrude and does not affect the impeller, and the size of the fan inlet can be adjusted at any time.

[0081] AsFigure 2 and 13 As shown in Figure -14, the air collection hood assembly 100 also includes an anti-backdraft assembly 150, which is connected to the fan assembly 140. The anti-backdraft assembly 150 includes an anti-backdraft duct 152, a bend pipe 151 connecting pipe, and an anti-backdraft component 153. The anti-backdraft component 153 is disposed inside the anti-backdraft duct 152. One end of the bend pipe 151 connecting pipe is connected to the fan assembly 140, and the other end is connected to the anti-backdraft duct 152. The anti-backdraft component 153 is disposed at the end of the anti-backdraft duct 152 away from the bend pipe 151 connecting pipe. The anti-backdraft component 153 can effectively prevent external airflow from flowing back into the fan assembly 140, allowing the airflow to flow in one direction. The design of the bend pipe 151 connecting pipe facilitates the connection between the anti-backdraft assembly 150 and the fan assembly 140, helps to optimize the airflow path, guides the airflow smoothly through the fan assembly 140 and the anti-backdraft duct 152, and improves the airflow efficiency.

[0082] like Figure 2 and 13 As shown in Figure -14, the bend 151 connecting pipe includes two bend 151 components and a connector. Each bend 151 component includes a groove 1511 and a flange 1512. The groove 1511 of one bend 151 component is connected and fixed to the flange 1512 of the other bend 151 component. The two bend 151 components are connected by the connector to form the bend 151 connecting pipe. They are pressed together by riveting, improving the overall structural strength and stability. Through modular design, the bend 151 components can be manufactured and inspected individually, and then assembled through simple connection operations, simplifying the manufacturing and assembly process and improving production efficiency. The connector fills the gap between the groove 1511 and the flange 1512, improving the airtightness of the connection, preventing gas leakage, and improving combustion efficiency.

[0083] like Figure 15 As shown, this embodiment also provides a gas water heater based on the gas collection hood assembly 100, which includes the gas collection hood assembly 100 as described above. Along the airflow path A, a combustion chamber assembly 200, a heat exchanger assembly 300, and the gas collection hood assembly 100 are sequentially arranged. By introducing the gas collection hood assembly 100 designed above into the gas water heater, the gas water heater can achieve more efficient, stable, and safer operation, reduce noise, and provide users with a better user experience.

[0084] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A gas collecting cover assembly provided in a gas water heater, the gas water heater comprising a combustion chamber, characterized in that, The air collecting hood assembly comprises a hood body, a fan assembly and an air equalizing plate, the hood body comprises a first air inlet and a first air outlet, the fan assembly is communicated with the first air outlet, the first air inlet has a larger diameter than the first air outlet, the air equalizing plate covers the first air inlet, the air equalizing plate comprises a first area opposite to the first air outlet and a second area other than the first area, the first area and the second area are both provided with a plurality of air inlets, and the air inlet amount of the first area is greater than that of the second area.

2. The hood assembly of claim 1, wherein, The air inlets in the first area are provided with first flanges extending in a direction towards the first air outlet by a preset length, and the air inlets in the second area are provided with second flanges extending in a direction towards the first air outlet by a preset length.

3. The hood assembly of claim 1, wherein, The size of the air inlets in the first area is not less than that of the air inlets in the second area; and / or, the number of the air inlets in the first area is not less than that of the air inlets in the second area.

4. The hood assembly of claim 1, wherein, The air collecting hood assembly further comprises an adapter plate provided with a first through hole, the first air outlet is provided with a third flange extending in a direction away from the hood body by a preset length, the adapter plate is connected with the hood body and the first through hole is sleeved on the third flange.

5. The hood assembly of claim 4, wherein, The cross section of the hood body is triangular, the side of the hood body towards the adapter plate is provided with a plurality of first connecting holes, the first connecting holes are uniformly spaced on the hood body along the circumference of the first air outlet, and the first connecting holes extend in a direction towards the inside of the hood body by a preset length; the adapter plate is provided with a same number of second connecting holes as the first connecting holes, the second connecting holes extend in a direction towards the first connecting holes by a preset length, and the first connecting holes are sleeved on the second connecting holes.

6. The hood assembly of claim 5, wherein, The air collecting hood assembly further comprises a screw connected with the first connecting holes and the second connecting holes to connect the adapter plate and the hood body.

7. The hood assembly of claim 4, wherein, The adapter plate is further provided with a limiting flange, the air collecting hood assembly further comprises a fan assembly communicated with the adapter plate, the limiting flange is sleeved on the outside of a fan shell of the fan assembly, and there is a gap space between the limiting flange and the outer edge of the fan shell.

8. The hood assembly of claim 7, wherein, The air collecting hood assembly further comprises an anti-backflow assembly connected with the fan assembly. The anti-backflow assembly comprises an anti-backflow cylinder, an elbow connecting pipe and an anti-backflow piece, the anti-backflow piece is arranged in the anti-backflow cylinder, one end of the elbow connecting pipe is communicated with the fan assembly, the other end is communicated with the anti-backflow cylinder, and the anti-backflow piece is arranged at the end of the anti-backflow cylinder away from the elbow connecting pipe.

9. The hood assembly of claim 8, wherein, The elbow connecting pipe comprises two elbow components and a connecting agent, the elbow component comprises a groove and a convex edge, the groove of one of the elbow components is connected and fixed with the convex edge of the other elbow component, and the two elbow components are connected by the connecting agent to form the elbow connecting pipe.

10. A gas water heater characterized by, The gas water heater comprises the gas collecting cover assembly as claimed in any one of claims 1-9.

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