Combustion chamber structure of gas water heater

Abstract

The utility model discloses a combustion chamber structure of a gas water heater, which relates to the field of gas water heaters, is used for solving the problems that a combustion chamber of a closed gas water heater is formed by combining single-layer plates, so that heat loss is easy to occur, and a splicing part is easy to leak due to long-term high temperature, and comprises a shell with an open top, an air opening and a pipeline opening are formed in the bottom of the outer shell, the inner container shell is arranged in the outer shell, the top edge and the bottom edge of the inner container shell are turned outwards to abut against the inner wall of the outer shell, and a heat insulation gap is formed between the inner container shell and the outer shell. The double-layer structure composed of the outer shell and the inner container shell is adopted as the combustion chamber, gas is mixed with air to be combusted in the inner container shell, the heat insulation gap is formed between the outer shell and the inner container shell, combustion heat in the inner container shell is not prone to being dissipated, heat loss is small, the inner container shell is of the integrated structure, and the conditions of structural damage and leakage at high temperature are not prone to occurring; the service life is long.

Description

Technical Field

[0001] The utility model relates to the field of gas water heaters, and in particular to a combustion chamber structure of a gas water heater. Background Art

[0002] The combustion chamber of a gas water heater is used to mix gas with air for combustion. The combustion chamber is divided into two structures: open and closed. The open combustion chamber draws air from the top, allowing air to enter the internal combustion chamber through the gaps around the combustion chamber and mix with the gas for combustion. This structure is easily affected by the backflow of air from the exhaust pipe, resulting in low combustion efficiency. The closed combustion chamber blows air upward from the bottom. This structure is sealed and not easily affected by the external environment, resulting in higher combustion efficiency.

[0003] Although the closed combustion chamber has a certain sealing effect, it is composed of a combination of single-layer metal plates. The single-layer structure is prone to heat loss and has low heat utilization efficiency. The combined structure is prone to corrosion and other damage at the connection parts under long-term high-temperature environment, making it difficult to maintain a long-term sealing effect. Utility Model Content

[0004] In order to make up for the shortcomings of the existing technical problems, the purpose of this utility model is to provide a combustion chamber structure of a gas water heater, which is used to solve the problem that the combustion chamber of a closed gas water heater is easily prone to heat loss due to its combination of single-layer plates and long-term high temperature easily causes leakage at the splicing parts.

[0005] In order to solve the problems of the prior art, the technical solutions of the present utility model are as follows:

[0006] A combustion chamber structure of a gas water heater includes an outer shell with an open top, an air vent and a pipe opening at the bottom of the outer shell, and an inner shell with a rectangular cross-section and a vertically connected inner shell. The inner shell is arranged inside the outer shell, and the top and bottom edges of the inner shell are folded outward to abut the inner wall of the outer shell, thereby forming a thermal insulation gap between the inner shell and the outer shell.

[0007] Preferably, the length of the outer shell is greater than the length of the inner shell, and the top of the inner shell is flush with the top of the outer shell, so that an assembly chamber is formed between the bottom of the inner shell and the bottom of the outer shell.

[0008] Preferably, the housing includes a cover shell and a cover plate, one side of the cover shell is open, and the cover plate is encapsulated on the open side of the cover shell.

[0009] Preferably, a liner is provided on the top of the assembly chamber. The liner is a rectangular frame structure. Both sides of the liner are bent upward to form a bending portion, and the bending portion is flatly fixed to the inner wall of the inner shell.

[0010] Preferably, a plurality of air holes penetrating the assembly chamber are evenly provided on the surface of the liner.

[0011] Preferably, the edge of the air hole bulges upward, so that the air hole has a cylindrical structure that is larger at the bottom and smaller at the top.

[0012] Preferably, an embedding groove is provided around the inner side of the top opening of the inner shell.

[0013] Compared with the prior art, the advantages of the present invention are as follows:

[0014] The utility model adopts a double-layer structure consisting of an outer shell and an inner shell as a combustion chamber. The gas mixes with air and burns in the inner shell. There is a heat-insulating gap between the outer shell and the inner shell, so that the combustion heat in the inner shell is not easily dissipated, and the heat loss is small. In addition, the inner shell is an integrated structure, which is not easy to be damaged or leaked at high temperature, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall external structure of the utility model.

[0016] Figure 2 This is one of the schematic diagrams of the distribution structure of the outer shell and the inner shell of the present utility model.

[0017] Figure 3 This is the second schematic diagram of the distribution structure of the outer shell and the inner shell of the present invention.

[0018] Figure 4 It is a schematic diagram of the overall split structure of the utility model.

[0019] Figure 5 This is a schematic diagram of the inner shell structure of the utility model.

[0020] Figure 6 This is a schematic diagram of the liner structure of the present utility model.

[0021] Figure 7 This is a schematic diagram of the air hole structure of the utility model.

[0022] Figure numerals: 1, cover shell; 2, cover plate; 3, inner shell; 31, embedded groove; 4, lining frame; 41, bending part; 5, air hole; 6, assembly chamber. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] like Figure 1-4 As shown, the combustion chamber structure of the gas water heater is composed of an outer shell, an inner shell 3, and a liner 4;

[0025] The housing is composed of a cover shell 1 and a cover plate 2. The cover shell 1 has an integrated bottom surface, two side surfaces, and a back surface. The top surface and the front surface of the cover shell 1 are open. The cover plate 2 is screwed to the open front surface of the cover shell 1 to form a housing with an open top. The bottom of the housing has an air outlet and a pipe opening.

[0026] like Figure 5 As shown, the inner liner shell 3 is a rectangular cross-sectional structure. The inner liner shell 3 is formed by integral welding, and its inner cavity is connected from top to bottom. The top edge and the bottom edge of the inner liner shell 3 are both folded outward 180°. The inner liner shell 3 is placed inside the outer shell, and the folded edge of the inner liner shell 3 contacts the inner wall of the outer shell to keep the top of the inner liner shell 3 flush with the top of the outer shell. The folded edge of the inner liner shell 3 that contacts the outer shell is fixed with screws to form a thermal insulation gap between the inner liner shell 3 and the outer shell.

[0027] like Figure 2 As shown, the length of the outer shell is greater than the length of the inner shell 3, and the top of the inner shell 3 is flush with the top of the outer shell, so that an assembly chamber 6 is formed between the bottom of the inner shell 3 and the bottom of the outer shell;

[0028] like Figure 6 As shown, the liner 4 is a rectangular frame structure, and both sides of the liner 4 are bent upward to form a bent portion 41. The liner 4 is placed on the top of the assembly chamber 6, and the bent portion 41 is flush with the inner side of the bottom opening of the inner shell 3 and fixed with screws;

[0029] The assembly process of the combustion chamber is as follows: first, use screws to fix the liner frame 4 to the bottom of the inner shell 3, disassemble the cover shell 1 and the cover plate 2, insert the inner shell 3 into the cover shell 1, keep the inner shell 3 flush with the top of the cover shell 1, use screws to fold the edge of the inner shell 3 and fix it to the cover shell 1, and send the fire grate from the front open position of the cover shell 1 into the assembly chamber 6, and then fix it upward on the surface of the liner frame 4. The gas pipeline and the pipeline control system are sent from the pipeline opening at the bottom of the cover shell 1 into the assembly chamber 6 to connect the fire grate, and then use screws to seal the cover plate 2 in the front open position of the cover shell 1. The air supply duct of the fan is connected to the air outlet at the bottom of the cover shell 1, and the heat exchanger, smoke pipe and other components are connected to the top of the inner shell 3;

[0030] The fan sends air from the bottom into the assembly chamber 6 and the inner liner shell 3, and the fire exhaust ignites and burns in the inner liner shell 3. Since there is a thermal insulation gap between the outer shell and the inner liner shell 3, the combustion heat in the inner liner shell 3 is not easy to dissipate, and the heat loss is small. In addition, the inner liner shell 3 is an integrated structure, which is not easy to cause structural damage or leakage at high temperatures.

[0031] For subsequent maintenance of the fire bar and its components, it is only necessary to remove the cover plate 2 and perform maintenance work from the position of the assembly chamber 6.

[0032] like Figure 6 、 7As shown, a number of air holes 5 penetrating the assembly chamber 6 are evenly opened around the surface of the liner 4. The air introduced by the bottom fan enters the assembly chamber 6 and is sent into the inner shell 3 through each air hole 5, so that the air flow is evenly distributed to ensure sufficient combustion effect. The edges of the air holes 5 are raised upward, so that the air holes 5 have a cylindrical structure with a larger bottom and a smaller top, so that the air flow conducted by the air holes 5 is stable and upward, avoiding the air flow from disturbing the combustion of the flame.

[0033] like Figure 5 As shown, an embedding groove 31 is provided around the inner side of the top opening of the inner shell 3, which is used to set a seal on the top of the inner shell 3 to connect components such as a heat exchanger.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combustion chamber structure of a gas water heater, comprising a shell with an open top, and a bottom of the shell having an air vent and a pipe opening, characterized in that: The inner liner shell (3) is arranged inside the outer shell, and the top edge and the bottom edge of the inner liner shell (3) are both folded outward to contact the inner wall of the outer shell, so that a thermal insulation gap is formed between the inner liner shell (3) and the outer shell.

2. The combustion chamber structure of the gas water heater according to claim 1, characterized in that: The length of the outer shell is greater than the length of the inner shell (3), and the top of the inner shell (3) is flush with the top of the outer shell, so that an assembly chamber (6) is formed between the bottom of the inner shell (3) and the bottom of the outer shell.

3. The combustion chamber structure of the gas water heater according to claim 1, characterized in that: The housing comprises a cover shell (1) and a cover plate (2); one side of the cover shell (1) is open, and the cover plate (2) is encapsulated on the open side of the cover shell (1).

4. The combustion chamber structure of the gas water heater according to claim 2, characterized in that: A liner (4) is provided on the top of the assembly chamber (6). The liner (4) is a rectangular frame structure. Both sides of the liner (4) are bent upward to form a bent portion (41). The bent portion (41) is flatly fixed to the inner wall of the inner shell (3).

5. The combustion chamber structure of the gas water heater according to claim 4, characterized in that: A plurality of air holes (5) penetrating the assembly chamber (6) are evenly provided on the surface of the lining frame (4).

6. The combustion chamber structure of the gas water heater according to claim 5, characterized in that: The edge of the air hole (5) bulges upward, so that the air hole (5) has a cylindrical structure that is larger at the bottom and smaller at the top.

7. The combustion chamber structure of the gas water heater according to claim 1, characterized in that: An embedding groove (31) is provided around the inner side of the top opening of the inner shell (3).

Images