Combustion device and gas water heater

Abstract

The utility model relates to the technical field of gas water heaters, in particular to a combustion device and a gas water heater. The combustion device comprises an exhaust fume collecting hood, a face shell and a bottom shell, a combustion cavity is defined by the face shell and the bottom shell, and the lower end of the exhaust fume collecting hood is fixedly connected with the upper end of the bottom shell through a fastener; the upper end of the face shell is connected with the lower end of the exhaust fume collecting hood in a buckled mode, and the lower end of the face shell is fixedly connected with the lower end of the bottom shell through a fastener so that the exhaust fume collecting hood can be buckled to the upper end of the combustion cavity. The face shell exerts downward pulling force on the exhaust fume collecting hood so that the exhaust fume collecting hood can be fastened to the upper end of the combustion cavity, the upper end of the face shell and the lower end of the exhaust fume collecting hood are connected in a buckled mode, the number of fasteners needed for assembling the face shell and the exhaust fume collecting hood is reduced, and therefore the assembling difficulty of the combustion device is reduced, and the assembling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas water heater technical field especially relates to a combustion device and gas water heater. BACKGROUND

[0002] In the gas water heater, the combustion device includes bottom shell, face shell, smoke collecting cover and burner and the like components, the bottom shell and the face shell enclose the combustion cavity, the burner is installed in the combustion cavity, the lower end of the smoke collecting cover and the upper end of the combustion cavity are assembled together to discharge the flue gas generated by the combustion of the burner.

[0003] In the production and assembly of the gas water heater, the existing smoke collecting cover and the combustion cavity (i.e. bottom shell and face shell) are fixedly installed together through fasteners. Because the number of required fasteners is relatively large, it is necessary to use locking tools to tighten each fastener one by one, resulting in the inconvenience and low efficiency of the assembly of the combustion device. UTILITY MODEL CONTENTS

[0004] One of the technical problems solved by the utility model is to provide a combustion device which can effectively solve the technical problem of the existing combustion device that the number of required fasteners is relatively large during assembly, resulting in the inconvenience and low efficiency of the assembly.

[0005] The second technical problem solved by the utility model is to provide a gas water heater which can effectively solve the technical problem of the existing combustion device that the number of required fasteners is relatively large during assembly, resulting in the inconvenience and low efficiency of the assembly.

[0006] The first technical problem is solved by the following technical scheme:

[0007] The combustion device includes a smoke collecting cover, a face shell and a bottom shell, the face shell and the bottom shell enclose a combustion cavity, the lower end of the smoke collecting cover and the upper end of the bottom shell are fixedly connected through fasteners;

[0008] The upper end of the face shell and the lower end of the smoke collecting cover are mutually buckled and connected, and the lower end of the face shell and the lower end of the bottom shell are fixedly connected through fasteners, so as to buckle the smoke collecting cover to the upper end of the combustion cavity.

[0009] The combustion device has the beneficial effects compared with the background art:

[0010] The lower end of the smoke hood is fixedly connected with the upper end of the bottom shell through fasteners. When the face shell is assembled with the smoke hood, the upper end of the face shell is connected with the lower end of the smoke hood through mutual buckling, and the lower end of the face shell is fixedly connected with the lower end of the bottom shell through fasteners. In this way, the face shell exerts a downward pulling force on the smoke hood to tightly buckle the smoke hood to the upper end of the combustion cavity, and the mutual buckling connection between the upper end of the face shell and the lower end of the smoke hood reduces the number of fasteners required for assembling the face shell and the smoke hood, thereby reducing the assembly difficulty of the combustion device and improving the assembly efficiency.

[0011] In one of the embodiments, the upper end of the face shell is provided with a first limiting part, and the lower end of the smoke hood is provided with a first limiting hole in the front-rear direction, or the upper end of the face shell is provided with a first limiting hole in the front-rear direction, and the lower end of the smoke hood is provided with a first limiting part; the first limiting part and the first limiting hole are connected through mutual buckling.

[0012] In one of the embodiments, the upper end of the face shell is provided with the first limiting part, and the lower end of the smoke hood is provided with the first limiting hole; the first limiting part includes a convex block protruding towards the lower end of the face shell, at least part of the convex block is inserted into the first limiting hole, and the convex block is pressed against the lower wall of the first limiting hole; or the upper end of the face shell is provided with the first limiting hole, and the lower end of the smoke hood is provided with the first limiting part; the first limiting part includes a convex block protruding towards the upper end of the smoke hood, at least part of the convex block is inserted into the first limiting hole, and the convex block is pressed against the upper wall of the first limiting hole.

[0013] In one of the embodiments, the upper end of the face shell is provided with a first flange extending outward, and the first flange is integrally provided with the convex block away from one side of the face shell.

[0014] In one of the embodiments, the convex block includes a pressing part extending to the outside of the first flange, and the pressing part is inserted into the first limiting hole and pressed against the lower wall of the first limiting hole.

[0015] The two side walls of the pressing part in the left-right direction are respectively provided with a connecting plate extending outward, the connecting plate is connected with the first flange, and the connecting plate is provided with a guide inclined surface inclined in the insertion direction of the convex block.

[0016] In one of the embodiments, when the pressing part is inserted into the first limiting hole, the first limiting hole has a single-sided gap between the adjacent connecting plates along the two side walls.

[0017] In one of the embodiments, the single-sided gap is 0.1mm-0.3mm.

[0018] In one of the embodiments, the lower end of the smoke hood extends downwardly and is provided with a second flange;

[0019] The second flange is provided with the first limiting hole in the front-rear direction, or the second flange is provided with the first limiting portion inwardly.

[0020] In one of the embodiments, the lower end of the face shell is provided with a first mounting hole, and the lower end of the bottom shell is provided with a second mounting hole, the first mounting hole and the second mounting hole are in one-to-one correspondence and are communicated and locked by a screw.

[0021] The second technical problem is solved by the following technical scheme:

[0022] The gas water heater comprises the combustion device.

[0023] Compared with the background art, the gas water heater has the beneficial effects that:

[0024] The lower end of the smoke hood and the upper end of the bottom shell are fixedly connected through a fastener, the upper end of the face shell and the lower end of the smoke hood are mutually buckled and connected when the face shell and the smoke hood are assembled, and the lower end of the face shell and the lower end of the bottom shell are fixedly connected through the fastener, so that the face shell exerts a downward pulling force on the smoke hood to buckle the smoke hood to the upper end of the combustion chamber, and the mutually buckled and connected upper end of the face shell and the lower end of the smoke hood reduce the number of fasteners required for assembling the face shell and the smoke hood, thereby reducing the assembly difficulty of the combustion device and improving the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the combustion device provided by the embodiment of the utility model;

[0026] Figure 2 is an explosion structural schematic view of the combustion device provided by the embodiment of the utility model;

[0027] Figure 3 is Figure 1 is a local enlarged view of A in figure;

[0028] Figure 4 is a structural schematic view of the face shell provided by the embodiment of the utility model;

[0029] Figure 5 is a local front view of the combustion device provided by the embodiment of the utility model;

[0030] Figure 6 is a structural schematic view of the smoke hood provided by the embodiment of the utility model.

[0031] Names and numbers of components in the figure are as follows:

[0032] 1, hood; 11, second flange; 110, first limiting hole; 2, face shell; 21, first limiting part; 211, convex; 212, connecting plate; 2120, guide inclined surface; 22, first flange; 23, first mounting hole; 3, bottom shell. DETAILED DESCRIPTION

[0033] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model will be further explained below in combination with the drawings and through specific embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, not to limit the utility model. In addition, it needs to be explained that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all.

[0034] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless explicitly defined and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the embodiment, the terms "up", "down", "right", "left", "front", "back" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] The technical scheme of the utility model will be further explained below in combination with the drawings and through specific embodiments.

[0038] This embodiment proposes a gas water heater, which includes a combustion device and a heat exchanger. The high-temperature flue gas generated by the combustion of the combustion device heats the water in the heat exchange tube through the heat exchanger to provide hot water to the user.

[0039] like Figures 1-2 As shown, this embodiment also proposes a combustion device, which includes a burner, a bottom shell 3, a front shell 2, and a smoke hood 1. The bottom shell 3 includes two side plates and a bottom plate. The bottom shell 3 and the front shell 2 form a combustion chamber. The burner is installed in the combustion chamber. The lower end of the smoke hood 1 is fixedly connected to the upper end of the bottom shell 3 by fasteners to discharge the flue gas generated by the burner combustion.

[0040] To ensure the sealing of the combustion chamber, the existing smoke hood is fixed to the combustion chamber with screws. Due to the large number of screws required, each screw needs to be tightened one by one using a locking tool, which makes the assembly of the combustion device inconvenient and inefficient.

[0041] To solve the above problems, such as Figures 1-3 As shown, in the combustion device of this embodiment, the upper end of the face shell 2 is interlocked with the lower end of the smoke hood 1, and the lower end of the face shell 2 is fixedly connected to the lower end of the bottom shell 3 by fasteners, so as to fasten the smoke hood 1 to the upper end of the combustion chamber. When assembling the face shell 2 and the smoke hood 1, the upper end of the face shell 2 and the lower end of the smoke hood 1 are interlocked, and the lower end of the face shell 2 and the lower end of the bottom shell 3 are fixedly connected by fasteners. In this way, the face shell 2 applies a downward pulling force to the smoke hood 1 to fasten the smoke hood 1 to the upper end of the combustion chamber. The interlocking connection between the upper end of the face shell 2 and the lower end of the smoke hood 1 reduces the number of fasteners required for assembling the face shell 2 and the smoke hood 1, thereby reducing the assembly difficulty of the combustion device and improving the assembly efficiency. In addition, since the upper end of the face shell 2 does not require screws to be installed with locking tools, damage to the surface of the face shell 2 by locking tools is avoided, thus improving the protection of the face shell 2.

[0042] It should be noted that there are multiple ways in which the upper end of the faceplate 2 and the lower end of the smoke hood 1 can be fastened together, such as hooks fastening to through holes or slots, protrusions fastening to through holes or slots, etc., which will not be elaborated here.

[0043] For example, the upper end of the faceplate 2 is provided with a first limiting part 21, and the lower end of the smoke collection hood 1 is provided with a first limiting hole 110 along the front-back direction. The first limiting part 21 and the first limiting hole 110 are engaged and connected to each other.

[0044] When the combustion device is assembled, such as Figure 1As shown in the drawings, first, the upper end of the bottom shell 3 is screwed with the rear side of the lower end of the smoke hood 1 to ensure the sealing of the smoke hood 1 and the bottom shell 3. Then, the first limiting part 21 of the upper end of the face shell 2 is buckled and connected with the first limiting hole 110 of the smoke hood 1, and finally, the lower end of the face shell 2 is screwed with the lower end of the bottom shell 3, so that the face shell 2 pulls the front side of the lower end of the smoke hood 1 through the first limiting part 21, thereby buckling the smoke hood 1 to the upper end of the combustion cavity, realizing the sealing assembly of the smoke hood 1 and the combustion cavity.

[0045] As shown in the drawings, Figure 1 and Figure 4 the lower end of the face shell 2 is provided with a first mounting hole 23, and the lower end of the bottom shell 3 is provided with a second mounting hole, which is in one-to-one correspondence with the first mounting hole 23 and is locked by a screw. The lower end of the face shell 2 and the bottom shell 3 is locked by a screw to improve the connection strength and disassembly efficiency of the face shell 2 and the bottom shell 3, thereby improving the structural strength of the combustion cavity.

[0046] Further, as shown in the drawings, Figure 3 and Figure 4 the first limiting part 21 includes a convex 211 protruding towards the lower end of the face shell 2, at least part of the convex 211 is inserted into the first limiting hole 110, and the convex 211 is pressed against the lower wall of the first limiting hole 110, thereby completing the buckling and connection of the first limiting part 21 and the first limiting hole 110. By stamping the convex 211 (or called profiled ridge) on the upper end of the face shell 2, the convex 211 is integrally formed with the face shell 2, reducing the processing difficulty of the convex 211 and ensuring the connection strength of the convex 211 and the face shell 2.

[0047] In another embodiment, the upper end of the face shell 2 is provided with a first limiting hole, and the lower end of the smoke hood 1 is provided with a first limiting part, which is inserted into the first limiting hole and pressed against the upper wall of the first limiting hole, which can also buckle the smoke hood 1 to the upper end of the combustion cavity, reducing the assembly difficulty of the combustion device and improving the assembly efficiency. Further, when the upper end of the face shell 2 is provided with a first limiting hole and the lower end of the smoke hood 1 is provided with a first limiting part, the first limiting part includes a convex protruding towards the upper end of the smoke hood 1, at least part of the convex is inserted into the first limiting hole, and the convex is pressed against the upper wall of the first limiting hole.

[0048] In one embodiment, the upper end of the face shell 2 extends outwardly and is provided with a first flange 22, and the side of the first flange 22 away from the face shell 2 is integrally provided with a convex 211. The lower end of the face shell 2 extends forwardly and is provided with a first flange 22, thereby providing a stamping space for processing the convex 211, facilitating the stamping processing of the convex 211. At the same time, the convex 211 is located on the side of the first flange 22 away from the face shell 2, avoiding deformation of the face shell 2 during processing of the convex 211, so as to maintain reliable sealing between the face shell 2 and the smoke hood 1.

[0049] As Figure 4 shown, the convex 211 includes a pressing portion extending to the outside of the first flange 22, the pressing portion is inserted into the first limiting hole 110 and abuts against the lower wall of the first limiting hole 110. The two side walls of the pressing portion along the width direction (left and right direction in the figure) are respectively provided with a connecting plate 212 connected with the first flange 22. By providing the connecting plate 212 on both sides of the pressing portion, the structural strength of the convex 211 is improved, and the bending deformation of the convex 211 when abutting against the lower wall of the first limiting hole 110 is avoided.

[0050] It should be noted that, as Figure 4 shown, the connecting plate 212 is provided with a guide inclined surface 2120 inclined along the insertion direction of the convex 211. By providing the guide inclined surface 2120, the insertion of the convex 211 into the first limiting hole 110 is guided, and the pressing portion of the convex 211 is quickly inserted into the first limiting hole 110, which improves the assembly efficiency of the face shell 2 and the smoke hood 1.

[0051] As Figure 5 shown, when the pressing portion is inserted into the first limiting hole 110, the two side walls of the first limiting hole 110 along the width direction (left and right direction in the figure) have a single-sided gap with the adjacent connecting plate 212. Because of the gap between the convex 211 and the first limiting hole 110, the convex 211 can be quickly inserted into the first limiting hole 110 without accurate alignment, which improves the assembly efficiency of the face shell 2 and the smoke hood 1. At the same time, the width of the first limiting hole 110 is greater than the width of the convex 211, so that the left and right side walls of the first limiting hole 110 will not abut against the connecting plate 212, avoiding reducing the pressing force of the convex 211 on the first limiting hole 110, so as to ensure the tensioning effect of the convex 211 on the smoke hood 1.

[0052] In the embodiment, in the same first limiting hole 110, the single-sided gap between the left side wall of the first limiting hole 110 and the connecting plate 212 on the left side of the convex 211 is h, the single-sided gap between the right side wall of the first limiting hole 110 and the connecting plate 212 on the right side of the convex 211 is h, and the single-sided gap h is 0.1mm, 0.2mm or 0.3mm, etc. If the single-sided gap h is less than 0.1mm, the gap between the first limiting portion 21 and the first limiting hole 110 is too small, which increases the difficulty of quickly inserting the convex 211 into the first limiting hole 110, and is not conducive to improving the assembly efficiency of the face shell 2 and the smoke hood 1; if the single-sided gap h is greater than 0.3mm, the gap between the first limiting portion 21 and the first limiting hole 110 is too large, which reduces the size of the convex 211 along the left and right directions, thereby reducing the structural strength of the convex 211 and the contact area between the convex 211 and the first limiting hole 110, and reducing the tensioning effect of the convex 211 on the smoke hood 1.

[0053] like Figure 1 and Figure 6 As shown, three protrusions 211 are spaced apart along the left-right direction on the side of the first flange 22 away from the face shell 2. Three first limiting holes 110 are correspondingly provided at the lower end of the smoke hood 1. The three protrusions 211 and the three first limiting holes 110 are inserted and fitted one-to-one, improving the assembly strength and sealing effect of the face shell 2 and the smoke hood 1. In other embodiments, the number of protrusions 211 and first limiting holes 110 can be flexibly adjusted according to the actual size of the combustion device, and is not specifically limited here.

[0054] like Figure 5 and Figure 6 As shown, in this embodiment, the lower end of the smoke hood 1 is provided with a second flange 11 extending downwards, and the second flange 11 is along the thickness direction ( Figure 2 A first limiting hole 110 is provided through the smoke hood 1 in the front-to-back direction. By providing a second flange 11, the structural strength of the lower end of the smoke hood 1 is improved, and the machining of the first limiting hole 110 is facilitated, preventing deformation of the lower end of the smoke hood 1 during machining of the first limiting hole 110, so as to maintain a reliable seal between the face shell 2 and the smoke hood 1. In one embodiment, when the upper end of the face shell 2 is provided with the first limiting hole 110 and the lower end of the smoke hood 1 is provided with the first limiting part 21, the second flange 11 is provided with the first limiting part 21 facing inward.

[0055] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A combustion device, characterized by, The hood (1), the face shell (2) and the bottom shell (3) are provided, the face shell (2) and the bottom shell (3) form a combustion cavity, the lower end of the hood (1) is fixedly connected with the upper end of the bottom shell (3) through fasteners; The upper end of the face shell (2) is connected with the lower end of the hood (1) through mutual buckling, and the lower end of the face shell (2) is fixedly connected with the lower end of the bottom shell (3) through fasteners, so that the hood (1) is buckled at the upper end of the combustion cavity.

2. The combustion apparatus of claim 1, wherein The upper end of the face shell (2) is provided with a first limiting part (21), the lower end of the hood (1) is provided with a first limiting hole (110) along the front-rear direction, or the upper end of the face shell (2) is provided with a first limiting hole along the front-rear direction, and the lower end of the hood (1) is provided with a first limiting part; the first limiting part (21) and the first limiting hole (110) are connected through mutual buckling.

3. The combustion apparatus of claim 2, wherein The upper end of the face shell (2) is provided with the first limiting part (21), and the lower end of the hood (1) is provided with the first limiting hole (110); the first limiting part (21) comprises a convex block (211) protruding towards the lower end of the face shell (2), at least part of the convex block (211) is inserted into the first limiting hole (110), and the convex block (211) is pressed against the lower wall of the first limiting hole (110); Alternatively, the upper end of the face shell (2) is provided with the first limiting hole, the lower end of the hood (1) is provided with the first limiting part, the first limiting part comprises a convex block protruding towards the upper end of the hood (1), at least part of the convex block is inserted into the first limiting hole, and the convex block is pressed against the upper wall of the first limiting hole.

4. The combustion apparatus of claim 3, wherein The upper end of the face shell (2) is provided with a first flange (22) extending outward, and the convex block (211) is integrally arranged on one side of the first flange (22) away from the face shell (2).

5. The combustion apparatus of claim 4, wherein The convex block (211) comprises a pressing part extending to the outside of the first flange (22), and the pressing part is inserted into the first limiting hole (110) and pressed against the lower wall of the first limiting hole (110); The two side walls of the pressing part along the left-right direction are respectively provided with a connecting plate (212) extending outward, the connecting plate (212) is connected with the first flange (22), and the connecting plate (212) is provided with a guide inclined surface (2120) inclined along the insertion direction of the convex block (211).

6. The combustion apparatus of claim 5, wherein When the pressing part is inserted into the first limiting hole (110), the first limiting hole (110) has a single-sided gap between the two side walls along the left-right direction and the adjacent connecting plate (212).

7. The combustion apparatus of claim 6, wherein The single-sided gap is 0.1mm-0.3mm.

8. The combustion apparatus according to any one of claims 2 to 7, characterized by The lower end of the hood (1) is provided with a second flange (11) extending downward; The second flange (11) is provided with the first limiting hole (110) penetrating along the front-rear direction, or the second flange (11) is provided with the first limiting part inwardly.

9. The combustion apparatus according to any one of claims 1 to 7, characterized by The face shell (2) is provided with first mounting holes (23) at the lower end, the bottom shell (3) is provided with second mounting holes at the lower end, the first mounting holes (23) and the second mounting holes are in one-to-one correspondence and are communicated and locked by screws.

10. A gas water heater characterised by, The combustion device according to any one of claims 1 to 9.

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