Combustion chamber structure and gas water heating equipment comprising same

Abstract

The invention relates to a combustion chamber structure and gas water heating equipment comprising the same. The combustion chamber structure is arranged between the heat exchanger and the combustor, the combustion chamber structure comprises an inner-layer shell and an outer-layer shell wrapping the inner-layer shell, any one of the outer side wall of the inner-layer shell and the inner side wall of the outer-layer shell is sunken in the direction away from the other one, and a heat exchange flow channel is defined by the outer side wall of the inner-layer shell and the inner side wall of the outer-layer shell and the other one; the heat exchange runner extends in the circumferential direction of the inner-layer shell, and a combustion inner cavity is defined by the inner side wall of the inner-layer shell; the separation structure is arranged in the heat exchange cavity and divides the heat exchange flow channel into at least two sub-flow channels distributed in the width direction of the heat exchange flow channel. According to the combustion chamber structure and the gas water heating equipment comprising the combustion chamber structure, the combustion chamber structure can be simplified, and the machining difficulty can be reduced.

Description

Technical Field

[0001] The present application relates to the field of hot water technology, and in particular to a combustion chamber structure and a gas hot water device comprising the same. Background Art

[0002] Traditional gas water heaters usually include a burner and a combustion chamber structure with a sandwich channel. The burner is used to ignite combustible gas. The combustion chamber structure is arranged on one side of the burner to form a combustion flame. After the water flows into the sandwich channel of the combustion chamber structure, it can absorb the heat of the combustion flame and smoke.

[0003] However, the conventional combustion chamber structure is complex and difficult to process. Therefore, how to simplify the combustion chamber structure and reduce the difficulty of processing the combustion chamber structure has become an urgent problem to be solved. Summary of the invention

[0004] In view of the above problems, according to various embodiments of the present application, a combustion chamber structure and a gas water heater including the same are provided.

[0005] A combustion chamber structure, comprising an inner shell and an outer shell covering the inner shell, wherein one of the outer wall of the inner shell and the inner wall of the outer shell is recessed in a direction away from the other and defines a heat exchange channel with the other, the heat exchange channel extends along the circumference of the inner shell, and the inner wall of the inner shell encloses a combustion cavity;

[0006] The partition structure is arranged in the heat exchange channel and divides the heat exchange channel into at least two sub-channels arranged along the width direction of the heat exchange channel.

[0007] In some embodiments, at least a portion of the inner side wall of the outer shell is recessed in a direction away from the inner shell, and defines the heat exchange channel together with the outer side wall of the inner shell.

[0008] In some embodiments, the inner side wall of the inner shell is recessed toward the outer shell so as to protrude on the outer side wall of the inner shell to form the partition structure abutting against the inner side wall of the outer shell; or

[0009] The outer side wall of the outer shell is recessed in a direction toward the inner shell, so as to protrude on the inner side wall of the outer shell to form the partition structure abutting against the outer side wall of the inner shell.

[0010] In some of the embodiments, the heat exchange channel further comprises a water inlet portion connected with each of the sub-channels and used for inputting water flow into each of the sub-channels, and a water outlet portion connected with each of the sub-channels and used for outputting the water flow in each of the sub-channels.

[0011] In some embodiments, a water inlet and a water outlet are provided on the outer shell;

[0012] The combustion chamber structure includes a water inlet joint and a water outlet joint. The water inlet joint is connected to the water inlet and communicates with the water inlet part. The water outlet joint is connected to the water outlet and communicates with the water outlet part.

[0013] In some embodiments, the outer shell is a semi-enclosed structure and has an elastic notch extending along the circumference of the inner shell.

[0014] In some embodiments, two ends of the inner shell or the outer shell that are oppositely arranged along its own axis are folded outward to form a first folding plate and a second folding plate. The first folding plate is used to assemble the burner, and the second folding plate is used to assemble the heat exchanger.

[0015] In some embodiments, a positioning portion is formed on the outer side wall of the inner shell, and a matching portion that is positioned and matched with the positioning portion is formed on the outer shell.

[0016] In some embodiments, the positioning portion is a convex column, and the matching portion is a notch; or, the positioning portion is a notch, and the matching portion is a convex column.

[0017] A gas water heater comprises a combustion chamber structure as described in any one of the above embodiments.

[0018] The above-mentioned combustion chamber structure and the gas water heater including the same, the inner wall of the inner shell encloses a combustion cavity, and the outer shell and the inner shell define a heat exchange channel. Under this design, the combustion chamber structure uses fewer parts, simplifies the combustion chamber structure, and reduces the processing difficulty.

[0019] In addition, the heat exchange flow channel is divided into at least two sub-flow channels. When the flow rate of the water flow input into the combustion chamber structure remains unchanged, the water flow velocity in each sub-flow channel is faster than the water flow velocity in the undivided heat exchange flow channel, the heat exchange efficiency of the water flow is improved, and at the same time, the cooling effect of the combustion chamber structure is also better. The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a gas water heater in some embodiments of the present application.

[0022] Figure 2 for Figure 1 The structural schematic diagram of the combustion chamber structure in the gas water heater shown.

[0023] Figure 3 for Figure 2 An exploded view of the combustion chamber structure is shown.

[0024] Figure 4 for Figure 2 A front view of the combustion chamber structure is shown.

[0025] Figure 5 for Figure 4 The combustion chamber structure shown is a partial cross-sectional view along the AA direction.

[0026] Figure 6 for Figure 2 Right side view of the combustion chamber structure shown.

[0027] Figure Number:

[0028] 1. Gas hot water equipment;

[0029] 10. Combustion chamber structure; 20. Heat exchanger; 30. Burner;

[0030] 11. Inner shell; 111. Partition structure; 112. Flame inlet; 113. Smoke outlet; 114. Positioning part; 115. Combustion cavity; 12. Outer shell; 121. First sub-wall; 122. Second sub-wall; 123. Water inlet; 124. Elastic notch; 125. Matching part; 13. Heat exchange flow channel; 131. Sub-flow channel; 132. Water inlet; 14. Water inlet joint; 15. Water outlet joint; 16. First folding plate; 161. First mounting hole; 17. Second folding plate; 171. Second mounting hole. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] See also Figure 1 The present application provides a gas water heater 1, which is used to heat and discharge hot water for room heating, daily washing, etc. The gas water heater 1 can be a wall-mounted boiler, a gas water heater, etc., which is not specifically limited here.

[0038] The gas water heater 1 includes a burner 30, a combustion chamber structure 10 and a heat exchanger 20. The burner 30 is used to output and ignite combustible gas. The combustion chamber structure 10 is arranged on one side of the burner 30 where the combustion flame is formed and is located between the burner 30 and the heat exchanger 20. The combustion chamber structure 10 is used to provide a space for accommodating the combustion flame. The heat exchanger 20 is the main heat exchange location in the gas water heater 1.

[0039] Please also read Figure 2 and Figure 5 , wherein the combustion chamber structure 10 has a heat exchange channel 13 and a combustion cavity 115, and the heat exchanger 20 has a heat exchange channel and a heat exchange cavity. The heat exchange channel 13 of the combustion chamber structure 10 is connected to the heat exchange channel of the heat exchanger 20, and the combustion cavity 115 of the combustion chamber structure 10 is connected to the heat exchange cavity of the heat exchanger 20.

[0040] In actual operation, the burner 30 outputs and ignites the combustible gas, and the combustible gas burns in the combustion cavity 115 of the combustion chamber structure 10 and generates combustion flames and smoke, and the smoke is discharged to the outside after flowing through the heat exchange cavity of the heat exchanger 20. In this process, the water flow in the heat exchange flow channel 13 absorbs the heat of the combustion flame and smoke in the combustion cavity 115, and is discharged into the heat exchange flow channel of the heat exchanger 20 after heating. In the process of water flowing in the heat exchange flow channel, the water flow can absorb the heat of the smoke in the heat exchange cavity of the heat exchanger 20 and heat it, and finally output it to the outside for users to wash, heat, etc.

[0041] Since the temperature of the water is increased when it flows through the heat exchange channel 13 of the combustion chamber structure 10, the water with a higher temperature flows into the heat exchange channel of the heat exchanger 20 and exchanges heat with the flue gas, and the temperature rises to a greater extent, and the thermal efficiency of combustion is also greatly improved.

[0042] In addition, it is worth mentioning that since the water flow in the heat exchange flow channel 13 of the combustion chamber structure 10 absorbs the heat of the combustion flame and flue gas in the combustion chamber structure 10 and then circulates to the outside, the temperature of the combustion chamber structure 10 decreases, the risk of high-temperature melting deformation of the combustion chamber structure 10 is reduced, and the service life is longer. Moreover, the temperature-reduced combustion chamber structure 10 reduces the degree of thermal influence on the components (such as the burner 30, the heat exchanger 20, etc.) arranged adjacent to it. It can be understood that if the temperature of the combustion chamber structure 10 is too high, the heat thereon is easily radiated to the adjacent components, causing the components to melt and deform at high temperature or cause working failures.

[0043] Please also read Figure 2 , Figure 3 , Figure 4 and Figure 5 , wherein the combustion chamber structure 10 includes an inner shell 11 and an outer shell 12 wrapped around the inner shell 11, either the outer wall of the inner shell 11 or the inner wall of the outer shell 12 is recessed in a direction away from the other, and defines a heat exchange channel 13 with the other, the heat exchange channel 13 extends along the circumference of the inner shell 11, and the inner wall of the inner shell 11 encloses a combustion cavity 115; the partition structure 111 is arranged in the heat exchange cavity, and divides the heat exchange channel 13 into at least two sub-channels 131 arranged along the width direction of the heat exchange channel 13.

[0044] The inner shell 11 and the outer shell 12 are generally made of metal materials with good thermal conductivity and high temperature resistance, such as stainless steel, copper, etc. Preferably, the inner shell 11 and the outer shell 12 are both made of stainless steel. Stainless steel has good corrosion resistance, which can reduce the possibility of corrosion and perforation of the inner shell 11 and the outer shell 12, and has a longer service life.

[0045] After the outer shell 12 is covered on the outside of the inner shell 11, the outer shell 12 and the inner shell 11 are first glued together, and then the outer shell 12 and the inner shell 11 are welded. The glueing and welding work together to reduce the risk of water leakage in the heat exchange flow channel 13 due to desoldering and welding between the outer shell 12 and the inner shell 11, thereby improving the sealing of the outer shell 12 and the inner shell 11.

[0046] The partition structure 111 may be other structures independent of the inner shell 11 and the outer shell 12, and connected to the inner shell 11 and the outer shell 12 by welding, gluing, detachable connection, etc., so as to separate the heat exchange flow channel 13 into at least two sub-flow channels 131. Alternatively, the partition structure 111 may also be a structure formed by stamping the inner shell 11 or the outer shell 12.

[0047] When the combustion chamber structure 10 is working, the water flows in the heat exchange flow channel 13 and absorbs the heat of the combustion flame and smoke in the combustion cavity 115. In this process, the temperature of the inner shell 11 and the outer shell 12 decreases, so that not only the risk of the inner shell 11 and the outer shell 12 being deformed due to high temperature melting is reduced, but also the degree of heat influence of the combustion chamber structure 10 on the components (such as the burner 30, the heat exchanger 20, etc.) located outside the outer shell 12 and adjacent to the outer shell 12 is reduced.

[0048] Exemplarily, there may be one or more partition structures 111, and the number of partition structures 111 is defined as N. All partition structures 111 are arranged at intervals along the width direction of the heat exchange channel 13, and the heat exchange channel 13 is divided into (N+1) sub-channels 131. For example, taking one partition structure 111 as an example, the heat exchange channel 13 is divided into two sub-channels 131. For another example, taking two partition structures 111 as an example, the heat exchange channel 13 is divided into three sub-channels 131.

[0049] The width direction of the heat exchange channel 13 can be parallel to the axial direction of the inner shell 11 (eg Figure 2 The width direction of the heat exchange channel 13 intersects with the axial direction of the inner shell 11, which means that the angle between the width direction of the heat exchange channel 13 and the axial direction of the inner shell 11 is an acute angle, a right angle, or an obtuse angle. For the convenience of explanation, the following embodiments all have the width direction of the heat exchange channel 13 (such as Figure 5 The following description will be made by taking the example that the direction indicated by X in the figure is parallel to the axial direction of the inner shell body 11.

[0050] Either the outer wall of the inner shell 11 or the inner wall of the outer shell 12 is recessed in a direction away from the other and defines a heat exchange channel 13 with the other. The heat exchange channel 13 may be formed between the recessed area of ​​the outer wall of the inner shell 11 and the inner wall of the outer shell 12, or the heat exchange channel 13 may be formed between the recessed area of ​​the inner wall of the outer shell 12 and the outer wall of the inner shell 11.

[0051] In the present application, the inner wall of the inner shell 11 defines a combustion chamber 115, and the outer shell 12 and the inner shell 11 enclose a heat exchange channel 13. This design uses fewer parts and simplifies the construction and processing difficulty of the combustion chamber structure 10.

[0052] In addition, the heat exchange channel 13 is divided into at least two sub-channels 131, and the cross-sectional area of ​​each sub-channel 131 is smaller than the cross-sectional area of ​​the heat exchange channel 13. When the flow rate input into the heat exchange channel 13 remains unchanged, the smaller the cross-sectional area, the greater the flow rate. Therefore, when the flow rate of the water flow input into the combustion chamber structure 10 remains unchanged, the water flow velocity flowing in each sub-channel 131 is faster than the water flow velocity in the undivided heat exchange channel 13, the heat exchange efficiency of the water flow is improved, and the cooling effect of the combustion chamber structure 10 is also better.

[0053] The cross-sectional area of ​​the sub-channel 131 is as follows: Figure 4 The cross-sectional area of ​​the sub-channel 131 formed by cutting along the AA direction in FIG. 1 is as follows: Figure 4 The cross-sectional area of ​​the heat exchange channel 13 formed by cutting along the AA direction.

[0054] Please refer again Figure 2 In some embodiments of the present application, at least a portion of the inner wall of the outer shell 12 is recessed in a direction away from the inner shell 11 , and defines a heat exchange channel 13 with the outer wall of the inner shell 11 .

[0055] Specifically, the inner wall of the outer shell 12 includes a first sub-wall 121 and a second side wall 122. The second side wall 122 is arranged around the periphery of the first sub-wall 121, and the first sub-wall 121 is recessed relative to the second sub-wall 122 in a direction away from the inner shell 11, and defines a heat exchange channel 13 with the outer wall of the inner shell 11, and the second side wall 122 is in contact with the outer wall of the inner shell 11.

[0056] Under the design of this embodiment, the difficulty of molding the heat exchange flow channel 13 is reduced, which facilitates the molding of the combustion chamber structure 10.

[0057] In some embodiments of the present application, the inner wall of the inner shell 11 is recessed in a direction approaching the outer shell 12, so that a partition structure 111 is protruded on the outer wall of the inner shell 11 and abuts against the inner wall of the outer shell 12; or, the outer wall of the outer shell 12 is recessed in a direction toward the inner shell 11, so that a partition structure 111 is protruded on the inner wall of the outer shell 12 and abuts against the outer wall of the inner shell 11.

[0058] Preferably, the inner wall of the inner shell 11 is recessed toward the outer shell 12, so that a partition structure 111 is protruded on the outer wall of the inner shell 11 to abut against the inner wall of the outer shell 12. This design helps to improve the rigidity of the inner shell 11.

[0059] When the partition structure 111 abuts against the inner wall of the outer shell 12, or abuts against the outer wall of the inner shell 11, the partition structure 111 can support the inner shell 11 and the outer shell 12 at the same time, which is beneficial to reduce the risk of deformation of the heat exchange channel 13 caused by squeezing the inner shell 11 and the outer shell 12, thereby ensuring the smooth flow of water in the heat exchange channel 13 of the combustion chamber structure 10 and improving the heat exchange efficiency.

[0060] Please read again Figure 3 and Figure 5 In some embodiments of the present application, the heat exchange channel 13 also has a water inlet 132 connected to each sub-channel 131 and used to input water flow into each sub-channel 131 , and a water outlet connected to each sub-channel 131 and used to output the water flow in each sub-channel 131 .

[0061] The water inlet 132 is connected to the water inlet section of each sub-channel 131. The water outlet can be connected to the water outlet section of each sub-channel 131, or can be connected to the middle section of each sub-channel 131. The middle section of each sub-channel 131 refers to one end of each sub-channel 131 located between its own water inlet section and water outlet section.

[0062] When the combustion chamber structure 10 is working, the water flow input from the external water source is divided into each sub-channel 131 at the water inlet 132, and then output through the water outlet. In the process of the water flow flowing through each sub-channel 131, the water flow exchanges heat with the combustion flame and smoke in the combustion cavity 115.

[0063] The arrangement of the water inlet 132 and the water outlet enables the water flowing in each sub-channel 131 to be centrally input through the water inlet 132 and to be centrally output through the water outlet.

[0064] Furthermore, in some embodiments of the present application, a water inlet 123 and a water outlet are provided on the outer shell 12; the combustion chamber structure includes a water inlet joint 14 and a water outlet joint 15, the water inlet joint 14 is connected to the water inlet 123 and is connected to the water inlet part 132, and the water outlet joint 15 is connected to the water outlet and is connected to the water outlet part.

[0065] For example, in some embodiments, the water inlet joint 14 is directly connected to the water inlet pipe of the gas water heater 1, and the water outlet joint 15 is connected to the input port of the heat exchange channel in the heat exchanger 20. Water from the external water source flows into the heat exchange channel 13 of the combustion chamber structure 10 through the water inlet pipe and the water inlet joint 14. After heat exchange, water flows out from the water outlet joint 15 and enters the heat exchange channel of the heat exchanger 20 to perform heat exchange with the flue gas in the heat exchange inner cavity of the heat exchanger 20.

[0066] Alternatively, the burner 30 is a water-cooled burner, the water inlet joint 14 is connected to the output port of the water-cooling channel in the burner 30, and the water outlet joint 15 is connected to the input port of the heat exchange channel in the heat exchanger 20. The water flow from the external water source flows into the heat exchange channel 13 of the combustion chamber structure 10 through the water inlet pipe, the water-cooling channel and the water inlet joint 14 in sequence, and after heat exchange, flows out from the water outlet joint 15 and enters the heat exchange channel of the heat exchanger 20.

[0067] By providing the water inlet joint 14 and the water outlet joint 15, the water channel outside the combustion chamber structure 10 can conveniently input the water flow that has not undergone heat exchange into the combustion chamber structure 10, and the combustion chamber structure 10 can conveniently output the water flow that has undergone heat exchange to the external water channel.

[0068] In some embodiments of the present application, the outer shell 12 is a semi-enclosed structure and has an elastic notch 124 extending along the circumference of the inner shell 11 .

[0069] The elastic notch 124 is a notch that can expand or contract along its extension direction under the action of external force. Since the outer shell 12 is generally made of metal material, the elastic notch 124 can expand or contract to a relatively small extent.

[0070] During actual assembly, the elastic notch 124 is expanded along the extension direction of the elastic notch 124 to expand the space formed by the outer shell 12, so as to facilitate the outer shell 12 to be sleeved outside the inner shell 11. Afterwards, the outer shell 12 is contracted, and the elastic notch 124 is restored to the size before expansion, so that the outer shell 12 is tightly clamped outside the inner shell 11, so as to facilitate the subsequent gluing and welding of the outer shell 12 and the inner shell 11 in sequence, and seal the gap between the outer shell 12 and the inner shell 11 to prevent water leakage in the heat exchange flow channel 13.

[0071] In some embodiments of the present application, the two ends of the inner shell 11 or the outer shell 12 that are relatively arranged along its own axial direction are folded outward to form a first folding plate 16 and a second folding plate 17. The first folding plate 16 is used to assemble the burner 30, and the second folding plate 17 is used to assemble the heat exchanger 20.

[0072] by Figure 1 Taking the state of the gas water heater 1 as an example, the burner 30 is located below the combustion chamber structure 10, and the heat exchanger 20 is located above the combustion chamber structure 10. At this time, the burner 30 is mounted on the first folding plate 16, and the heat exchanger 20 is mounted on the second folding plate 17 and supported by the second folding plate 17.

[0073] Preferably, the inner shell 11 has two opposite ends along its own axial direction respectively provided with a flame inlet 112 and a smoke outlet 113 connected to the combustion cavity 115 , the first folding plate 16 is circumferentially arranged around the flame inlet 112 , and the second folding plate 17 is circumferentially arranged around the smoke outlet 113 .

[0074] The flame inlet 112 refers to an opening through which the combustion flame enters the combustion inner cavity 115 , and the smoke outlet 113 refers to an opening through which the smoke generated by the combustion is discharged to the heat exchanger 20 .

[0075] Specifically, the first folding plate 16 can be an annular plate or an arc-shaped plate, or the first folding plate 16 can also include a plurality of first folding portions, all of which are arranged along the circumference of the flame inlet 112. The specific structure of the first folding plate 16 can be set as needed and is not limited here. The difference between the annular plate and the arc-shaped plate is that the annular plate is a closed structure, while the arc-shaped plate is an open structure.

[0076] For easy installation, the first folding plate 16 is provided with a plurality of first mounting holes 161, and all the first mounting holes 161 on the first folding plate 16 are arranged at intervals along the circumference of the flame inlet 112. The combustion chamber structure 10 also includes a plurality of first mounting members, and all the first mounting members correspond to all the first mounting holes 161 on the first folding plate 16 one by one. Each first mounting member is inserted into the corresponding first mounting hole 161, and is detachably connected to the first folding plate 16 and the burner 30. Among them, the first mounting member can be a detachable member such as a screw or a pin.

[0077] The second folding plate 17 has the same structure as the first folding plate 16 , and the installation method between the second folding plate 17 and the inner shell body 11 is also the same, so it will not be described here in detail.

[0078] The second folding plate 17 is provided with a second mounting hole 171, and the second folding plate 17 is detachably connected to the heat exchanger 20 via a second mounting member. The second mounting hole 171 is provided in the same manner as the first mounting hole 161, and the second mounting member is also the same as the first mounting member, so it will not be described in detail here.

[0079] By providing the first folded plate 16 and the second folded plate 17 , the assembly connection between the combustion chamber structure 10 and the burner 30 and the heat exchanger 20 can be achieved.

[0080] Please refer again Figure 3 and Figure 4 , and also see Figure 6 In some embodiments of the present application, a positioning portion 114 is formed on the outer wall of the inner shell 11 , and a matching portion 125 that is positioned and matched with the positioning portion 114 is formed on the outer shell 12 .

[0081] The positioning portion 114 and the matching portion 125 are concave-convex matching. For example, the positioning portion 114 is a convex column protruding from the outer wall of the inner shell 11, and the matching portion 125 is a groove formed by the inner wall of the outer shell 12. For another example, the positioning portion 114 is a convex column protruding from the outer wall of the inner shell 11, and the matching portion 125 is a notch at the edge of the outer shell 12. For another example, the positioning portion 114 is a groove formed by the outer wall of the inner shell 11, and the matching portion 125 is a convex column protruding from the inner wall of the outer shell 12.

[0082] It is worth mentioning that the axial direction of the outer shell 12 is in the same direction as the axial direction of the inner shell 11 .

[0083] Preferably, the positioning portion 114 is arranged on the outer side wall of the inner shell 11 and is arranged opposite to the second sub-wall 122, and the matching portion 125 is arranged on the second sub-wall 122. Specifically, a plurality of positioning portions 114 are formed on the inner shell, and the plurality of positioning portions 114 are divided into two groups, each group having at least two positioning portions 114, and all positioning portions 114 in each group are arranged at intervals along the circumference of the inner shell 11, and the two groups of positioning portions 114 are arranged along the axial direction of the inner shell 11. A plurality of matching portions 125 are also formed on the outer shell 12, and all matching portions 125 correspond to and match all positioning portions 114 one by one, so as to position the two ends of the outer shell 12.

[0084] By providing the positioning portion 114 and the matching portion 125 , the inner shell 11 and the outer shell 12 can be positioned and matched before welding to prevent relative movement of the inner shell 11 and the outer shell 12 during subsequent welding.

[0085] Furthermore, in some embodiments, the positioning portion 114 is a convex column, and the matching portion 125 is a notch; or, the positioning portion 114 is a notch, and the matching portion 125 is a convex column.

[0086] This matching method is simple and easy to operate, and is convenient for forming the positioning portion 114 and the matching portion 125 .

[0087] In some embodiments of the present application, at least the outer side wall of the outer shell 12 is covered with a heat-resistant and corrosion-resistant composite coating (not shown).

[0088] Preferably, the composite coating can be applied to the inner wall, the outer wall and the connecting wall between the inner wall and the outer wall of the outer shell 12. The composite coating can be an epoxy phenolic coating, an inorganic zinc-rich primer coating, and the like.

[0089] By covering at least the outer side wall of the outer shell 12 with a heat-resistant and corrosion-resistant composite coating, the corrosion resistance and high temperature resistance of the outer shell 12 can be improved, thereby extending the service life of the combustion chamber structure 10.

[0090] In the combustion chamber structure 10 and the gas water heater 1 including the same, the inner wall of the inner shell 11 encloses a combustion cavity 115, and the outer shell 12 and the inner shell 11 define a heat exchange channel 13. Under this design, the combustion chamber structure 10 uses fewer parts, simplifies the combustion chamber structure 10, and reduces the difficulty of processing. In addition, the heat exchange channel 13 is divided into at least two sub-channels 131. When the flow rate of the water flow input into the combustion chamber structure 10 remains unchanged, the water flow velocity flowing in each sub-channel 131 is faster than the water flow velocity in the undivided heat exchange channel 13, and the heat exchange efficiency of the water flow is improved. At the same time, the cooling effect of the combustion chamber structure 10 is also better.

[0091] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A combustion chamber structure, characterized in that: The combustion chamber structure comprises an inner shell (11) and an outer shell (12) covering the inner shell (11), wherein either the outer wall of the inner shell (11) or the inner wall of the outer shell (12) is recessed in a direction away from the other and defines a heat exchange channel (13) with the other, wherein the heat exchange channel (13) extends along the circumference of the inner shell (11), and the inner wall of the inner shell (11) encloses a combustion chamber (115); The partition structure (111) is arranged in the heat exchange channel (13) and divides the heat exchange channel (13) into at least two sub-channels (131) arranged along the width direction of the heat exchange channel (13).

2. The combustion chamber structure according to claim 1, characterized in that: At least a portion of the inner side wall of the outer shell (12) is recessed in a direction away from the inner shell (11), and defines the heat exchange flow channel (13) together with the outer side wall of the inner shell (11).

3. The combustion chamber structure according to claim 1 or 2, characterized in that: The inner side wall of the inner shell (11) is recessed in a direction close to the outer shell (12), so as to protrude on the outer side wall of the inner shell (11) to form the partition structure (111) abutting against the inner side wall of the outer shell (12); or The outer side wall of the outer shell (12) is recessed in a direction toward the inner shell (11) so as to protrude on the inner side wall of the outer shell (12) to form the partition structure (111) abutting against the outer side wall of the inner shell (11).

4. The combustion chamber structure according to claim 1, characterized in that: The heat exchange channel (13) further comprises a water inlet (132) connected to each of the sub-channels (131) and used for inputting water flow into each of the sub-channels (131), and a water outlet connected to each of the sub-channels (131) and used for outputting the water flow in each of the sub-channels (131).

5. The combustion chamber structure according to claim 4, characterized in that: The outer shell (12) is provided with a water inlet (123) and a water outlet; The combustion chamber structure comprises a water inlet joint (14) and a water outlet joint (15); the water inlet joint (14) is connected to the water inlet (123) and communicates with the water inlet portion (132); the water outlet joint (15) is connected to the water outlet and communicates with the water outlet portion.

6. The combustion chamber structure according to claim 1, characterized in that: The outer shell (12) is a semi-enclosed structure and has an elastic notch (124) extending along the circumference of the inner shell (11).

7. The combustion chamber structure according to claim 1, characterized in that: The two ends of the inner shell (11) or the outer shell (12) which are arranged opposite to each other along their own axial direction are respectively folded outward to form a first folding plate (16) and a second folding plate (17); the first folding plate (16) is used to assemble the burner (30), and the second folding plate (17) is used to assemble the heat exchanger (20).

8. The combustion chamber structure according to claim 1, characterized in that: A positioning portion (114) is formed on the outer side wall of the inner shell (11), and a matching portion (125) for positioning and matching with the positioning portion (114) is formed on the outer shell (12).

9. The combustion chamber structure according to claim 8, characterized in that: The positioning portion (114) is a convex column, and the matching portion (125) is a notch; or, the positioning portion (114) is a notch, and the matching portion (125) is a convex column.

10. A gas water heater, characterized in that: It comprises a combustion chamber structure as described in any one of claims 1 to 9 above.

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