Combustion chamber for gas water heater and gas water heater

Abstract

The utility model provides a kind of combustion chamber and gas water heater for gas water heater, and combustion chamber includes: shell;First cooling air hole, open in the side wall of shell and with the combustion cavity of shell communication;Primary air hole, open in shell and with gas nozzle form coaxial or tangential direction's airflow passage;Secondary air hole, open in shell and compared with primary air hole more far from the burner of combustion chamber setting;The air inlet area of first cooling air hole, primary air hole and secondary air hole is S1, S2 and S3 respectively, and the sum of the air inlet area of first cooling air hole, primary air hole and secondary air hole is S;Then: the range of S1 is 16%*S±1%*S, the range of S2 is 44%*S±1%*S, and the range of S3 is 40%*S±1%*S.By limiting the air inlet area ratio of first cooling air hole, primary air hole and secondary air hole, gradient type air supply can be formed near the burner, to ensure sufficient premixing of gas and air to improve combustion efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water heaters, and in particular to a combustion chamber for a gas water heater and a gas water heater. Background Technology

[0002] Gas water heaters are a common household appliance widely used for domestic hot water supply. With technological advancements, the types and functions of gas water heaters are constantly increasing, with their rational structural design making them popular in the market. However, existing gas water heaters face some pressing issues in their development and production.

[0003] The combustion system of existing gas water heaters typically consists of a gas distribution pipe, a burner, and a casing. Existing gas water heaters suffer from incomplete combustion and high CO content in the exhaust gas. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned defects in the prior art and provide a combustion chamber for a gas water heater and a gas water heater.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A combustion chamber for a gas water heater, characterized in that the combustion chamber comprises:

[0007] A housing, wherein a combustion chamber is provided within the housing;

[0008] The first cooling vent is formed on the side wall of the housing and communicates with the combustion chamber;

[0009] A primary air vent is formed on the housing and forms a coaxial or tangential airflow channel with the gas nozzle;

[0010] A secondary air vent is formed on the housing and is located further away from the combustion chamber than the primary air vent on the burner.

[0011] The air inlet area of ​​the first cooling air hole is S1, the air inlet area of ​​the primary air hole is S2, the air inlet area of ​​the secondary air hole is S3, and the sum of the air inlet areas of the first cooling air hole, the primary air hole, and the secondary air hole is S.

[0012] Therefore: the range of S1 is 16%*S±1%*S, the range of S2 is 44%*S±1%*S, and the range of S3 is 40%*S±1%*S.

[0013] In this technical solution, by limiting the specific proportion of the air inlet area of ​​the first cooling air hole, the primary air hole, and the secondary air hole, a gradient air supply can be formed near the burner. This ensures that the gas and air are fully premixed to improve combustion efficiency, while the secondary air hole, which is far from the burner, enhances the oxygen supplementation effect. At the same time, the cooling air volume is reasonably allocated to achieve a dynamic balance between combustion and heat dissipation, avoiding shell deformation caused by the concentration of high-temperature areas.

[0014] Preferably, S1 is 16%*S, S2 is 44%*S, and S3 is 40%*S.

[0015] In this technical solution, the above settings provide the most preferred specific proportion of the air inlet area of ​​the first cooling air hole, the primary air hole, and the secondary air hole.

[0016] Preferably, the sidewall of the housing is formed with a heat dissipation assembly, which includes an air intake cooling channel that can introduce air into the combustion chamber, and the first cooling vent communicates with the air intake cooling channel.

[0017] In this technical solution, a heat dissipation component is formed on the side wall of the casing, achieving an integrated design of the combustion system and the heat dissipation system. Air cooling is achieved through the air intake cooling channel formed on the side wall of the casing, completing the heat dissipation function while introducing combustion air. This structure reduces the use of independent heat dissipation components, lowers production costs, and improves heat dissipation uniformity and casing structural strength through the integrated design of the airflow path.

[0018] Preferably, the housing includes a plurality of sidewalls, the plurality of sidewalls surrounding the combustion chamber, and the sidewalls having a hollow interlayer inside;

[0019] The sidewall includes an inner side plate and an outer side plate, the inner side plate and the outer side plate are spaced apart to form the hollow interlayer, the outer side plate has a first cooling air hole, the inner side plate has a second cooling air hole, and the first cooling air hole and the second cooling air hole are staggered.

[0020] The first cooling vent, the hollow interlayer, and the second cooling vent constitute the air intake cooling channel.

[0021] In this technical solution, a hollow sandwich side panel design is adopted, transforming the shell sidewall into a distributed heat dissipation channel. The sandwich structure simultaneously achieves air cooling and enhances shell rigidity, replacing the traditional external heat sink structure, reducing material costs and improving the overall structural stability of the combustion chamber. By staggering the first and second cooling vents on the inner and outer side panels, a circuitous cooling airflow path is formed, extending the heat exchange time of the air within the sandwich layer. This improves heat dissipation efficiency while avoiding the weakening of panel strength caused by through-holes, balancing cooling effect and shell structural integrity.

[0022] Preferably, the combustion chamber further includes a burner assembly, which includes a plurality of burner units, and the number of primary air holes corresponds one-to-one with and is connected to the burner units;

[0023] The plurality of sidewalls include a first sidewall disposed opposite to each other along the length direction of the combustion chamber, and a second sidewall disposed along the width direction, wherein the distance between the burner assembly and the first sidewall is greater than or equal to 26 mm, and the distance between the burner assembly and the second sidewall is greater than or equal to 18 mm.

[0024] In this technical solution, by setting the range of values ​​for the distance between the heat exchanger assembly and the first sidewall, and the distance between the heat exchanger assembly and the second sidewall, the heat dissipation effect can be further improved.

[0025] Preferably, the housing includes a secondary air plate, the secondary air vents are disposed on the secondary air plate, and the secondary air plate is disposed at the bottom of the combustion chamber.

[0026] In this technical solution, by setting the secondary air holes on the secondary air plate at the bottom of the combustion chamber, the negative pressure area formed by the rising combustion airflow can be used to enhance the secondary air intake power. This not only improves the oxygen supply effect at the tail of the flame, but also avoids the structural strength loss caused by opening too many holes on the side of the shell, and simplifies the cleaning and maintenance process of the bottom area.

[0027] Preferably, the combustion chamber further includes a burner assembly, which includes a plurality of burner units, and the number of primary air holes corresponds one-to-one with and is connected to the burner units.

[0028] Preferably, the number of gas nozzles and the number of primary air holes correspond one-to-one and they are coaxially arranged.

[0029] In this technical solution, the gas nozzle and the primary air hole are set coaxially and matched in number to ensure that the gas jet and the air flow direction are precisely coordinated, thereby improving combustion stability. At the same time, the standardized nozzle layout achieves uniform distribution of heat load in the combustion chamber, reducing the thermal shock of local high temperature to the shell.

[0030] Preferably, the distance between two adjacent primary air holes and the distance between two adjacent fire vent units are both greater than or equal to 17 mm.

[0031] In this technical solution, the above-mentioned settings are used to further ensure complete combustion.

[0032] A gas water heater includes a combustion chamber as described above for a gas water heater.

[0033] The positive and progressive effects of this utility model are as follows:

[0034] This invention, by defining the specific proportion of the air inlet area of ​​the first cooling air hole, the primary air hole, and the secondary air hole, can form a gradient air supply near the burner. This ensures sufficient premixing of gas and air to improve combustion efficiency, while enhancing the oxygen supply effect through the secondary air hole far from the burner. At the same time, it rationally distributes the cooling air volume to achieve a dynamic balance between combustion and heat dissipation, avoiding shell deformation caused by the concentration of high-temperature areas. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the combustion chamber of a preferred embodiment of the present invention.

[0036] Figure 2 This is a partial three-dimensional cross-sectional view of the combustion chamber of a preferred embodiment of the present invention.

[0037] Figure 3 This is a three-dimensional cross-sectional view of one side wall of a preferred embodiment of the present invention.

[0038] Figure 4 This is a schematic diagram of the structure of the secondary air plate according to a preferred embodiment of the present invention.

[0039] Figure 5 This is a partial three-dimensional cross-sectional view of the combustion chamber from another angle, representing a preferred embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] Side wall 1

[0042] Outer plate 11

[0043] First cooling vent 111

[0044] Inner side plate 12

[0045] Second cooling vent 121

[0046] Primary air hole 13

[0047] First sidewall 14

[0048] Second sidewall 15

[0049] Fire duct assembly 2

[0050] Secondary air panel 3

[0051] Secondary air vent 31

[0052] Gas nozzle 4

[0053] Length direction L

[0054] Width direction W Detailed Implementation

[0055] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] like Figures 1 to 5 As shown, this embodiment provides a combustion chamber for a gas water heater. The combustion chamber includes a shell, and a combustion cavity is provided inside the shell.

[0059] In this embodiment, the combustion chamber is located below the burner assembly 2. The gas enters the combustion chamber from the burner assembly 2 and is burned. Above the combustion chamber is a heat exchange tube. The heat exchange tube contains water that needs to be heated. The gas burns in the combustion chamber and generates high-temperature flue gas that flows upward and heats the water in the heat exchange tube.

[0060] The combustion chamber also includes a first cooling air hole 111, a primary air hole 13, and a secondary air hole 31. The first cooling air hole 111 is opened on the side wall 1 of the housing and communicates with the combustion chamber; the primary air hole 13 is opened on the housing and forms a coaxial or tangential airflow channel with the gas nozzle 4; the secondary air hole 31 is opened on the housing and is located further away from the combustion chamber than the primary air hole 13.

[0061] The air inlet area of ​​the first cooling air vent 111 is S1, the air inlet area of ​​the primary air vent 13 is S2, the air inlet area of ​​the secondary air vent 31 is S3, and the sum of the air inlet areas of the first cooling air vent 111, the primary air vent 13, and the secondary air vent 31 is S; then: the range of S1 is 16%*S±1%*S, the range of S2 is 44%*S±1%*S, and the range of S3 is 40%*S±1%*S.

[0062] In this way, by limiting the specific proportions of the air intake areas of the first cooling air vent 111, the primary air vent 13, and the secondary air vent 31, a gradient air supply can be formed near the burner. This ensures sufficient premixing of gas and air to improve combustion efficiency, while enhancing oxygen supplementation through the secondary air vent 31 located away from the burner. Simultaneously, the cooling airflow is rationally allocated to achieve a dynamic balance between combustion and heat dissipation, avoiding shell deformation caused by high-temperature concentration. It should be noted that the number of the first cooling air vent 111, the primary air vent 13, and the secondary air vent 31 can be one or multiple. When there are multiple first cooling air vents 111, the primary air vent 13, and the secondary air vent 31, the air intake area of ​​the first cooling air vent 111 is the total air intake area of ​​all the first cooling air vents 111, the air intake area of ​​the primary air vent 13 is the total air intake area of ​​all the primary air vents 13, and the air intake area of ​​the secondary air vent 31 is the total air intake area of ​​all the secondary air vents 31.

[0063] Preferably, S1 is 16%*S, S2 is 44%*S, and S3 is 40%*S, which are the most preferred percentages of the air intake area of ​​the first cooling vent 111, the primary air vent 13, and the secondary air vent 31.

[0064] Preferably, a heat dissipation assembly is formed on the side wall 1 of the housing. This assembly includes an intake cooling channel that introduces air into the combustion chamber, and a first cooling vent 111 communicates with the intake cooling channel. Thus, by forming the heat dissipation assembly on the side wall 1 of the housing, the combustion system and the heat dissipation system are integrated. Air cooling is achieved through the intake cooling channel formed on the side wall 1, completing the heat dissipation function while introducing combustion air. This structure reduces the use of independent heat dissipation components, lowers production costs, and improves heat dissipation uniformity and housing structural strength through the integrated design of the airflow path.

[0065] Preferably, the shell includes multiple sidewalls 1, which surround a combustion chamber. Each sidewall 1 has a hollow interlayer. Each sidewall 1 includes an inner side plate 12 and an outer side plate 11, which are spaced apart to form the hollow interlayer. A first cooling vent 111 is provided on the outer side plate 11, and a second cooling vent 121 is provided on the inner side plate 12. The first and second cooling vents 111 are staggered. The first cooling vent 111, the hollow interlayer, and the second cooling vent 121 form an intake cooling channel. Thus, by adopting a hollow interlayer sidewall design, the shell sidewall is transformed into a distributed heat dissipation channel. The interlayer structure simultaneously achieves air cooling and shell rigidity enhancement, replacing the traditional external heat sink structure, reducing material costs, and improving the overall structural stability of the combustion chamber. By staggering the first cooling vent 111 and the second cooling vent 121 on the inner side plate 12 and the outer side plate 11, a detour cooling airflow path is formed, which prolongs the heat exchange time of the air in the interlayer. This improves heat dissipation efficiency while avoiding the weakening of the panel strength by the through holes, thus balancing the cooling effect and the integrity of the shell structure.

[0066] As described above, the combustion chamber also includes a burner assembly 2, which comprises several burner units. The number of primary air vents 13 corresponds one-to-one with and is connected to each burner unit. Multiple sidewalls 1 include first sidewalls 14 arranged opposite each other along the length L of the combustion chamber, and second sidewalls 15 arranged along the width W. The distance between the burner assembly 2 and the first sidewall 14 is greater than or equal to 26 mm, and the distance between the burner assembly 2 and the second sidewall 15 is greater than or equal to 18 mm. Thus, by setting the range of values ​​for the distances between the burner assembly 2 and the first sidewall 14, and between the burner assembly 2 and the second sidewall 15, the heat dissipation effect can be further improved.

[0067] In this embodiment, the housing includes a secondary air plate 3, with secondary air holes 31 disposed on the secondary air plate 3, which is located at the bottom of the combustion chamber. By placing the secondary air holes 31 on the secondary air plate 3 at the bottom of the combustion chamber, the negative pressure area formed by the rising combustion airflow can be utilized to enhance the secondary air intake power. This improves the oxygen supply effect at the flame tail while avoiding structural strength loss caused by opening too many holes on the side of the housing, and simplifies the cleaning and maintenance process of the bottom area.

[0068] Preferably, the number of gas nozzles 4 and primary air holes 13 are one-to-one and coaxially arranged. In this way, the coaxial arrangement and matching number of gas nozzles 4 and primary air holes 13 ensure precise coordination between the gas jet and air flow direction, improve combustion stability, and at the same time, the standardized nozzle layout achieves uniform distribution of heat load in the combustion chamber, reducing the thermal shock of local high temperature to the shell.

[0069] Preferably, the distance between two adjacent primary air holes 13 and the distance between two adjacent fire row units are both greater than or equal to 17 mm, so as to further ensure complete combustion.

[0070] Here is a specific implementation method with the following data: The total air inlet area S1 of the multiple first cooling air vents 111 is 565.2 mm², the total air inlet area S2 of the multiple primary air vents 13 is 1540 mm², and the total air inlet area S3 of the multiple secondary air vents 31 is 1441 mm². The sum of the air inlet areas S of the first cooling air vents 111, primary air vents 13, and secondary air vents 31 is 3546.2 mm², where S1 is 15.94% of S, S2 is 43.43% of S, and S3 is 40.63% of S. Under these data, the area ratio of the first cooling air vents 111, primary air vents 13, and secondary air vents 31 ensures both effective heat dissipation and complete combustion of the gas, resulting in a CO content of approximately 50 ppm under full-load long flue conditions, which is 50% lower than existing technologies. It should be noted that scaling up or down these data proportionally will achieve the same effect of complete combustion.

[0071] Correspondingly, the combustion chamber has six gas nozzles 4, and the orifice diameter of the gas nozzles 4 is 2.05 mm; the distance between two adjacent primary air holes 13 and the distance between two adjacent burner units are both equal to 17 mm. The distribution pipe parameters, as one of the core parameters of the combustion system, ensure complete combustion.

[0072] The above settings only operate with a single exhaust port open during minimum load combustion, resulting in a production rate of 0.98 L / min. By optimizing the gas distribution pipe structure, the gas supply under minimum load operating conditions is reduced, thereby lowering the minimum production rate. This allows the minimum production rate to be below 1 L / min even when the water temperature is increased by 25 K, a 50% reduction compared to existing technologies.

[0073] This embodiment also provides a gas water heater, which includes the combustion chamber for a gas water heater as described above.

[0074] This gas water heater can be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the gas water heater to perform corresponding operations, thereby realizing intelligent control of the gas water heater and improving the user experience.

[0075] The combustion chamber and gas water heater of this embodiment, by limiting the specific proportion of the air intake area of ​​the first cooling air hole 111, the primary air hole 13 and the secondary air hole 31, can form a gradient air supply near the burner. This ensures that the gas and air are fully premixed to improve combustion efficiency, and enhances the oxygen supplementation effect through the secondary air hole 31 far away from the burner. At the same time, the cooling air volume is reasonably distributed to achieve a dynamic balance between combustion and heat dissipation, avoiding shell deformation caused by the concentration of high temperature areas.

[0076] 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 combustion chamber for a gas water heater, characterized in that, The combustion chamber includes: A housing, wherein a combustion chamber is provided within the housing; The first cooling vent is formed on the side wall of the housing and communicates with the combustion chamber; A primary air vent is formed on the housing and forms a coaxial or tangential airflow channel with the gas nozzle; A secondary air vent is formed on the housing and is located further away from the combustion chamber than the primary air vent on the burner. The air inlet area of ​​the first cooling air hole is S1, the air inlet area of ​​the primary air hole is S2, the air inlet area of ​​the secondary air hole is S3, and the sum of the air inlet areas of the first cooling air hole, the primary air hole, and the secondary air hole is S. Therefore: the range of S1 is 16%*S±1%*S, the range of S2 is 44%*S±1%*S, and the range of S3 is 40%*S±1%*S.

2. The combustion chamber for a gas water heater as described in claim 1, characterized in that, S1 is 16%*S, S2 is 44%*S, and S3 is 40%*S.

3. The combustion chamber for a gas water heater as described in claim 1, characterized in that, The sidewall of the housing is formed with a heat dissipation assembly, which includes an air intake cooling channel that can introduce air into the combustion chamber, and the first cooling vent is connected to the air intake cooling channel.

4. The combustion chamber for a gas water heater as described in claim 3, characterized in that, The housing includes a plurality of sidewalls, which surround the combustion chamber, and the sidewalls have a hollow interlayer inside. The sidewall includes an inner side plate and an outer side plate, the inner side plate and the outer side plate are spaced apart to form the hollow interlayer, the outer side plate has a first cooling air hole, the inner side plate has a second cooling air hole, and the first cooling air hole and the second cooling air hole are staggered. The first cooling vent, the hollow interlayer, and the second cooling vent constitute the air intake cooling channel.

5. The combustion chamber for a gas water heater as described in claim 4, characterized in that, The combustion chamber also includes a flame grid assembly, which includes a plurality of flame grid units, and the number of primary air holes corresponds one-to-one with and is connected to the flame grid units. The plurality of sidewalls include a first sidewall disposed opposite to each other along the length direction of the combustion chamber, and a second sidewall disposed along the width direction, wherein the distance between the burner assembly and the first sidewall is greater than or equal to 26 mm, and the distance between the burner assembly and the second sidewall is greater than or equal to 18 mm.

6. The combustion chamber for a gas water heater as described in claim 1, characterized in that, The housing includes a secondary air plate, the secondary air vents are disposed on the secondary air plate, and the secondary air plate is disposed at the bottom of the combustion chamber.

7. The combustion chamber for a gas water heater as described in claim 1, characterized in that, The combustion chamber also includes a burner assembly, which includes several burner units, and the number of primary air holes corresponds one-to-one with and is connected to the burner units.

8. The combustion chamber for a gas water heater as described in claim 7, characterized in that, The number of gas nozzles and the number of primary air holes are one-to-one and they are coaxially arranged.

9. The combustion chamber for a gas water heater as described in claim 7, characterized in that, The distance between two adjacent primary air holes and the distance between two adjacent fire grid units are both greater than or equal to 17 mm.

10. A gas water heater, characterized in that, It includes a combustion chamber for a gas water heater as described in any one of claims 1 to 9.

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