Combustion chamber of updraft water heater

Abstract

The utility model provides a combustion chamber of an up-drawing type water heater, which comprises a combustion chamber box body, the combustion chamber box body is defined by a plurality of side panels, a combustion inner cavity is defined by the plurality of side panels, a fire grate component is arranged in the combustion inner cavity, and a heat exchanger and a fan which are communicated with the combustion inner cavity are arranged at the top of the combustion chamber box body; the side panel comprises an inner side plate and an outer side plate which are connected with each other, an interlayer inner cavity is arranged between the inner side plate and the outer side plate, the outer side plate and the inner side plate are respectively provided with an air inlet hole and an air outlet hole, and the air inlet hole, the air outlet hole and the interlayer inner cavity are communicated with each other to form an air cooling channel. Due to the fact that the heat exchanger assembly is wrapped in the double-layer structure of the side panel, a coil pipe type heat exchanger does not need to be additionally arranged. By means of the design, the structure of the combustion chamber is simplified, the overall weight is reduced, and the combustion chamber is lighter and convenient to install and maintain. And meanwhile, the cost investment caused by the arrangement of the coil pipe type heat exchanger is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gas water heater, especially relates to a combustion chamber of updraft water heater. BACKGROUND

[0002] In the existing gas water heater technology, high-temperature flue gas is generated after the gas is fully combusted in the combustion chamber. The high-temperature flue gas then passes through the heat exchanger, which absorbs the heat in the flue gas and transfers it to the water, thereby increasing the temperature of the cold water passing through the heat exchanger to the target temperature. The operation of the fan provides the necessary air and oxygen for the entire system. In the updraft water heater, the fan is installed at the top of the machine, and the operation of the fan creates negative pressure inside the machine core, which causes air to be drawn from the bottom of the combustion chamber and mixed with the gas for combustion, and the high-temperature air formed by the combustion heats the fins and the water.

[0003] However, most of the updraft gas water heaters on the market use copper water tanks, which usually have a shell. Although this design has the advantage of high heat exchange efficiency and low shell surface temperature rise, it also has obvious disadvantages. The copper water tank is relatively expensive, and the shell coiled tube is prone to corrosion and perforation, resulting in water leakage problems. Specifically, condensate water tends to accumulate inside the shell, causing electrochemical corrosion and eventually causing the coil to perforate. This not only causes the heat exchanger to leak, but also can cause damage to other components, and even cause property damage such as the user's floor being soaked. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of copper coil leakage in the combustion chamber of the gas water heater and high cost of the copper heat exchanger in the prior art, and to provide a combustion chamber for an updraft water heater.

[0005] The utility model solves the above technical problems by the following technical solutions:

[0006] A combustion chamber for an updraft water heater, comprising:

[0007] A combustion chamber box body is formed by a plurality of side panels, which define a combustion inner cavity. A fire grate assembly is arranged in the combustion inner cavity. A heat exchanger and a fan are arranged on the top of the combustion chamber box body and communicate with the combustion inner cavity.

[0008] The side panels include an inner side panel and an outer side panel connected to each other, and a sandwiched inner cavity is formed between the inner side panel and the outer side panel. The outer side panel and the inner side panel are respectively provided with an air inlet hole and an air outlet hole, and the air inlet hole, the air outlet hole and the sandwiched inner cavity are in communication to form an air cooling channel.

[0009] In the present scheme, the above structure is adopted, the combustion chamber box body is surrounded by a plurality of side panels, which define the combustion inner cavity and provide stable combustion space for the fire grate assembly. The heat exchanger and fan arranged at the top of the combustion chamber box body are in communication with the combustion inner cavity, which can effectively promote the heat transfer and air circulation, improve the combustion efficiency and heat exchange effect. The side panel includes an inner side plate and an outer side plate connected to each other, and has a sandwiched inner cavity between the inner side plate and the outer side plate. The outer side plate and the inner side plate are respectively provided with air inlet holes and air outlet holes, and the air inlet holes, the air outlet holes and the sandwiched inner cavity are in communication to form a complete air cooling channel. The air enters the sandwiched inner cavity through the air inlet hole, flows in the inner cavity and absorbs heat, and then is discharged through the air outlet hole, which effectively reduces the temperature of the combustion chamber and avoids the damage of high temperature to the structure of the combustion chamber and the surrounding components, prolonging the service life of the combustion chamber. In addition, since the double-layer structure of the side panel wraps the heat exchanger assembly, it is not necessary to additionally arrange a coil type heat exchanger. This design simplifies the structure of the combustion chamber, reduces the overall weight, and makes the combustion chamber more portable, convenient to install and maintain. At the same time, the cost investment caused by the setting of the coil type heat exchanger is reduced.

[0010] Preferably, the air inlet hole is arranged at the middle position of the outer side plate, and the top end and the bottom end of the inner side plate are respectively provided with a first air outlet hole and a second air outlet hole. The air cooling channel includes a lower cooling air duct from the middle of the outer side plate downward along the sandwiched inner cavity to the second air outlet, and an upper cooling air duct from the middle of the outer side plate upward along the sandwiched inner cavity to the first air outlet.

[0011] In the present scheme, the above structure is adopted, the air inlet hole is arranged at the middle position of the outer side plate, and the top end and the bottom end of the inner side plate are respectively provided with a first air outlet hole and a second air outlet hole. The air cooling channel is ingeniously divided into two layers, i.e. a lower cooling air duct from the middle of the outer side plate downward along the sandwiched inner cavity to the second air outlet, and an upper cooling air duct from the middle of the outer side plate upward along the sandwiched inner cavity to the first air outlet. This layered air cooling channel design enables the air to enter from the air inlet hole at the middle of the outer side plate and flow in the sandwiched inner cavity in two directions, up and down. In the process of flowing, the air fully absorbs the heat generated in the combustion chamber, thereby achieving effective cooling of the combustion chamber. The lower cooling air duct is mainly responsible for cooling the lower half of the combustion chamber, while the upper cooling air duct focuses on heat dissipation of the upper half. Through the synergistic effect of the upper and lower cooling air ducts, the heat in the combustion chamber can be more uniformly and efficiently dissipated, thereby achieving the best cooling effect.

[0012] Preferably, the edge of the outer side plate is bent to form an outer folded edge towards the inner side plate, and the edge of the inner side plate has an inner folded edge with the same bending direction as the outer folded edge, and the outer folded edge and the inner folded edge are sealed.

[0013] In the present scheme, the above structure is adopted, and the design enables the upper folded edge of the inner side plate to be flatly attached to the folded edge of the outer side plate, thereby effectively preventing the cooling air from escaping from the gap between the two folded edges. During the operation of the combustion chamber, the cooling air can flow smoothly along the predetermined air cooling channel and sufficiently absorb the heat generated in the combustion chamber, without lowering the cooling efficiency due to air leakage. This not only ensures that the combustion chamber can be maintained within a suitable temperature range, avoids damage to the structure of the combustion chamber and the surrounding components caused by high temperature, prolongs the service life of the combustion chamber, but also improves the combustion efficiency and heat exchange effect.

[0014] Preferably, a first boss protruding towards the inner side plate is formed on the outer side plate, and a second boss protruding towards the outer side plate is formed on the inner side plate in correspondence with the first boss, and the first boss and the second boss abut and are provided with a riveting hole penetrating through the inner side plate and the outer side plate.

[0015] Preferably, a lower portion of one of the side plates is provided with a fire grate interface, the fire grate assembly is mounted on the fire grate interface, and the second air outlet is arranged adjacent to the fire grate interface.

[0016] In the present scheme, the above structure is adopted, and the design realizes efficient flow and utilization of cooling air. After being sucked into the outer side plate through the air inlet hole, the cooling air enters the lower cooling air channel. The air flows downward along the interlayer cavity, during which the air absorbs the heat generated in the combustion chamber, thereby playing a role in temperature reduction. Subsequently, the air flows out through the second air outlet on the inner side plate and directly flows towards the front end of the fire grate. This flow direction design ensures that the cooling air can fully contact the key heat generating area of the combustion chamber.

[0017] Preferably, the combustion chamber box body further comprises a secondary air plate arranged at the bottom, the secondary air plate connects the bottoms of the plurality of side plates and defines the combustion inner cavity, a plurality of secondary air holes are formed on the secondary air plate, and the diameters of the secondary air holes are between 3-6 mm.

[0018] In the present scheme, the above structure is adopted, the secondary air plate arranged at the bottom of the combustion chamber box body connects the bottoms of the plurality of side plates and defines the combustion inner cavity, and a plurality of secondary air holes are formed on the secondary air plate, with the diameters of the secondary air holes being controlled to be between 3-6 mm. By controlling the diameters of the secondary air holes to be between 3-6 mm, the smooth flow of the secondary air is ensured, the problem of blockage is avoided, the backfire phenomenon is effectively prevented, and the stability and safety of the combustion process are ensured.

[0019] Preferably, a mounting groove is further formed on the secondary air plate, and the bottom of the fire grate assembly is fixed in the mounting groove.

[0020] In the scheme, the above structure is adopted, through the design of the installation groove on the secondary air plate and the cooperation with the side plate, not only the fire bank assembly is effectively fixed, the stability of combustion is ensured, but also the gas supply mode is optimized, the combustion efficiency and environmental protection performance are improved, and powerful technical support is provided for efficient, stable and environmental protection operation of the updraft type water heater.

[0021] Preferably, the fire bank assembly comprises a plurality of fire bank units, the fire bank unit comprises a gas injection pipe and a fire outlet hole towards the top, both sides of the fire outlet hole are provided with flame stabilizing plates which extend obliquely towards the top and both sides, and the included angle between the flame stabilizing plate and the horizontal direction is 47°.

[0022] In the scheme, the above structure is adopted, the flame stabilizing plate is set to 47°, which not only effectively stabilizes the flame, improves the combustion efficiency and stability, but also optimizes the flow path of the secondary air, promotes the full combustion, and provides powerful guarantee for the efficient, stable and environmental protection operation of the updraft type water heater.

[0023] Preferably, an inner side plate of at least one side plate is provided with a fire observation window, and a plurality of fire observation holes are provided on the outer side plate correspondingly.

[0024] In the scheme, the above structure is adopted, the design of the fire observation window and the fire observation hole provides convenience for the external observation and working state judgment of the burner. The operator can clearly observe the color, shape, height and other characteristics of the flame and the working state of the fire bank assembly, such as the ejection of gas, whether the combustion is sufficient and the like, without directly contacting the high-temperature combustion chamber. This convenient observation mode not only improves the safety of operation, but also reduces the difficulty of operation, so that the daily monitoring and maintenance of the burner are more efficient.

[0025] Preferably, the inner side plate and / or the outer side plate are formed by one-piece stamping to form the interlayer inner cavity and the outer and / or inner folding edges.

[0026] In the scheme, the above effect is adopted, the interlayer inner cavity and the outer and / or inner folding edges are formed by one-piece stamping, and the design of large-area stamping is adopted, which not only improves the plane strength of the inner and outer side plates, so that they can withstand complex working conditions, but also ensures the uniformity of the gap between the inner and outer side plates, and optimizes the performance of the air cooling channel.

[0027] Preferably, the outer side plate is made of galvanized sheet or aluminum plated sheet.

[0028] and / or,

[0029] The inner side plate is made of SUS430 or stainless steel material with higher corrosion resistance.

[0030] In the scheme, the above structure is adopted, the outer side plate adopts a galvanized sheet or an aluminum plated sheet, and the inner side plate adopts SUS430 or a stainless steel material of a higher corrosion resistance level, so that the corrosion resistance and service life of the combustion chamber can be effectively improved, and the stability and safety of the combustion chamber in a high temperature environment can be ensured.

[0031] The positive progress effect of the utility model lies in: the utility model discloses the combustion chamber of the up-drawing type water heater, the combustion chamber box body is formed by a plurality of side panels, and the side panels define a combustion inner cavity and provide a stable combustion space for the fire grate assembly.The heat exchanger and the fan arranged at the top of the combustion chamber box body are communicated with the combustion inner cavity, which can effectively promote the heat transfer and air circulation, improve the combustion efficiency and heat exchange effect.The side panel comprises an inner side plate and an outer side plate connected with each other, and a sandwiched inner cavity is formed between the inner side plate and the outer side plate.The outer side plate and the inner side plate are respectively provided with an air inlet hole and an air outlet hole, and the air inlet hole, the air outlet hole and the sandwiched inner cavity are communicated with each other to form a complete air cooling channel.Air enters the sandwiched inner cavity through the air inlet hole, flows in the inner cavity and absorbs heat, and then is discharged through the air outlet hole, which effectively reduces the temperature of the combustion chamber, avoids damage to the combustion chamber structure and surrounding components caused by high temperature, and prolongs the service life of the combustion chamber.In addition, since the double-layer structure of the side panel wraps the heat exchanger assembly, a coil type heat exchanger does not need to be additionally arranged.This design simplifies the structure of the combustion chamber, reduces the overall weight, makes the combustion chamber more portable, and facilitates installation and maintenance.At the same time, the cost investment caused by the arrangement of the coil type heat exchanger is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is an explosion structure schematic view of the combustion chamber of the up-drawing type water heater of the utility model embodiment.

[0033] Figure 2 It is an explosion structure schematic view of the side panel of the utility model embodiment.

[0034] Figure 3 It is an outer side structure schematic view of the side panel of the utility model embodiment.

[0035] Figure 4 It is an inner side structure schematic view of the side panel of the utility model embodiment.

[0036] Figure 5 It is a cross-sectional structure schematic view of the side panel of the utility model embodiment.

[0037] Figure 6 It is a structure schematic view of the secondary air plate of the utility model embodiment.

[0038] Figure 7 It is a structure schematic view of the fire grate unit of the utility model embodiment.

[0039] Reference signs:

[0040] Side panel 1

[0041] Outer side panel 11

[0042] Air inlet hole 111

[0043] Outer folded edge 112

[0044] First boss 113

[0045] Fire observation hole 114

[0046] Inner side panel 12

[0047] Second air outlet hole 121

[0048] First air outlet hole 122

[0049] Fire observation window 123

[0050] Inner folded edge 124

[0051] Second boss 125

[0052] Fire grate assembly 2

[0053] Fire grate unit 20

[0054] Fire hole 21

[0055] Ejector pipe 22

[0056] Flame stabilizing plate 23

[0057] Secondary air plate 3

[0058] Secondary air hole 31

[0059] Mounting groove 32

[0060] Fire grate interface 13 DETAILED DESCRIPTION

[0061] A preferred embodiment will be described below in conjunction with the accompanying drawings to more clearly and completely illustrate the present utility model.

[0062] As Figures 1 to 7 shown, a combustion chamber of an up-drawing type water heater comprises a combustion chamber box body, which is formed by a plurality of side panels 1, and defines a combustion inner cavity, wherein a fire grate assembly 2 is arranged. The combustion chamber box body is provided with a heat exchanger and a fan at the top thereof, which are in communication with the combustion inner cavity. The side panel 1 comprises an inner side panel 12 and an outer side panel 11 connected with each other, and has a sandwiched cavity between the inner side panel 12 and the outer side panel 11. The outer side panel 11 and the inner side panel 12 are respectively provided with an air inlet hole 111 and an air outlet hole, and the air inlet hole 111, the air outlet hole and the sandwiched cavity are in communication to form an air cooling channel.

[0063] The combustion chamber box is formed by a plurality of side panels 1, which define a combustion inner cavity and provide a stable combustion space for the fire grate assembly 2. The heat exchanger and fan arranged at the top of the combustion chamber box are in communication with the combustion inner cavity, which can effectively promote heat transfer and air circulation, improve combustion efficiency and heat exchange effect. The side panel 1 includes an inner side panel 12 and an outer side panel 11 connected to each other, and has a sandwiched inner cavity between the inner side panel 12 and the outer side panel 11. The outer side panel 11 and the inner side panel 12 are respectively provided with an air inlet hole 111 and an air outlet hole. The air inlet hole 111, the air outlet hole and the sandwiched inner cavity are in communication with each other to form a complete air cooling channel. Air enters the sandwiched inner cavity through the air inlet hole 111, flows in the inner cavity and absorbs heat, and then is discharged through the air outlet hole. This process effectively reduces the temperature of the combustion chamber, avoids damage to the structure of the combustion chamber and the surrounding components caused by high temperature, and prolongs the service life of the combustion chamber. In addition, since the double-layer structure of the side panel 1 wraps the heat exchanger assembly, there is no need to additionally arrange a coil type heat exchanger. This design simplifies the structure of the combustion chamber, reduces the overall weight, and makes the combustion chamber more portable, convenient to install and maintain. At the same time, the cost investment caused by the arrangement of the coil type heat exchanger is reduced.

[0064] As shown in Figures 1 to 4 , the air inlet hole 111 is arranged at the middle position of the outer side panel 11, and the top end and the bottom end of the inner side panel 12 are respectively provided with a first air outlet hole 122 and a second air outlet hole 121. The air cooling channel includes a lower cooling air passage that is downwardly conducted from the middle of the outer side panel 11 to the second air outlet along the sandwiched inner cavity, and an upper cooling air passage that is upwardly conducted from the middle of the outer side panel 11 to the first air outlet along the sandwiched inner cavity.

[0065] The air inlet hole 111 is arranged at the middle position of the outer side panel 11, and the top end and the bottom end of the inner side panel 12 are respectively provided with a first air outlet hole 122 and a second air outlet hole 121. The air cooling channel is ingeniously divided into two layers, i.e. a lower cooling air passage that is downwardly conducted from the middle of the outer side panel 11 to the second air outlet along the sandwiched inner cavity, and an upper cooling air passage that is upwardly conducted from the middle of the outer side panel 11 to the first air outlet along the sandwiched inner cavity. This layered air cooling channel design allows air to enter from the air inlet hole 111 at the middle of the outer side panel 11 and flow in the sandwiched inner cavity in two directions, i.e. upward and downward. In the process of flowing, the air fully absorbs the heat generated in the combustion chamber, thereby achieving effective cooling of the combustion chamber. The lower cooling air passage is mainly responsible for cooling the lower half of the combustion chamber, while the upper cooling air passage focuses on heat dissipation of the upper half. Through the synergistic effect of the upper and lower cooling air passages, the heat in the combustion chamber can be more uniformly and efficiently dissipated, thereby achieving the best cooling effect.

[0066] As shown in Figure 2As shown, the edge of the outer side plate 11 is bent inward to form an outer bent edge 112, and the edge of the inner side plate 12 has an inner bent edge 124 in the same direction as the outer bent edge 112, and the outer bent edge 112 and the inner bent edge 124 are tightly sealed.

[0067] This design allows the upper bent edge of the inner side plate 12 to be flatly and tightly sealed with the bent edge of the outer side plate 11, thereby effectively preventing cooling air from escaping from the gap between the two bent edges. During the operation of the combustion chamber, cooling air can flow smoothly along the predetermined air cooling channel and fully absorb the heat generated in the combustion chamber, without reducing the cooling efficiency due to air leakage. This not only ensures that the combustion chamber can maintain within the appropriate temperature range, avoids high temperature damage to the structure of the combustion chamber and the surrounding components, prolongs the service life of the combustion chamber, but also improves the combustion efficiency and heat exchange effect.

[0068] As shown in FIG. 1, Figures 2 to 4 As shown, the outer side plate 11 is provided with a first protrusion 113 protruding towards the inner side plate 12, and the inner side plate 12 is provided with a second protrusion 125 protruding towards the outer side plate 11, and the first protrusion 113 and the second protrusion 125 abut and are provided with a riveting hole penetrating through the inner side plate 12 and the outer side plate 11.

[0069] As shown in FIG. 1, Figure 5 As shown in FIG. 1, one of the side panels 1 is provided with a fire grate interface 13 at the lower part, and the fire grate assembly 2 is installed on the fire grate interface 13, and the second air outlet is arranged adjacent to the fire grate interface 13.

[0070] This design realizes efficient flow and utilization of cooling air. After being sucked into the outer side plate 11 through the air inlet hole 111, the cooling air enters the lower cooling air channel. The air flows downward along the interlayer cavity, during which the air absorbs the heat generated in the combustion chamber, thereby playing a role in temperature reduction. Subsequently, the air flows out through the second air outlet on the inner side plate 12 and directly flows to the front end of the fire grate. This flow direction design ensures that the cooling air can fully contact the key heat generating area of the combustion chamber.

[0071] As shown in FIG. 1, Figure 1 , Figure 6 As shown in FIG. 1, the combustion chamber box body further comprises a secondary air plate 3 arranged at the bottom, the secondary air plate 3 connects the bottoms of the plurality of side panels 1 and defines the combustion inner cavity, and the secondary air plate is provided with a plurality of secondary air holes 31, and the diameter of the secondary air holes 31 is between 3-6 mm.

[0072] The secondary air plate 3 arranged at the bottom of the combustion chamber box body connects the bottoms of the plurality of side panels 1 and defines the combustion inner cavity, and the secondary air plate 3 is provided with a plurality of secondary air holes 31, and the diameter of the secondary air holes 31 is between 3-6 mm. By controlling the diameter of the secondary air holes 31 to be between 3-6 mm, the smooth flow of secondary air is ensured, the problem of blockage is avoided, the phenomenon of backfire is effectively prevented, and the stability and safety of the combustion process are ensured.

[0073] The design of this aperture range is carefully considered to ensure reasonable supply of secondary air and improvement of combustion efficiency. The aperture of the secondary air hole 31 should not be too large or too small, and is best kept at 3-6mm. If the aperture is too small, it is easy to cause blockage, affecting the normal supply of secondary air, thereby reducing combustion efficiency. If the aperture is too large, it cannot effectively block backfire, which may cause unstable combustion, and even safety hazards.

[0074] As shown in Figure 6 , the secondary air plate 3 is also provided with a mounting groove 32, and the bottom of the fire grate assembly 2 is fixed in the mounting groove 32.

[0075] Through the design of the mounting groove 32 on the secondary air plate 3 and its cooperation with the side panel 1, not only the fire grate assembly 2 is effectively fixed, ensuring the stability of combustion, but also the gas supply mode is optimized, improving the combustion efficiency and environmental performance, providing strong technical support for the efficient, stable and environmentally friendly operation of the updraft water heater.

[0076] On the one hand, the installation of the mounting groove 32 can better fix the fire grate assembly 2. The bottom of the fire grate assembly 2 is fixed in the mounting groove 32, making the fire grate more stable during combustion and less likely to shift or sway. This stable fixing method helps to ensure the stability of combustion, avoiding problems such as insufficient combustion and flame deviation due to unstable fire grate, thereby improving the combustion efficiency and heat exchange effect, ensuring the normal operation and heating performance of the water heater.

[0077] On the other hand, the cooperation of the secondary air plate 3 and the side panel 1 provides a more reasonable gas supply mode for the fire grate. The secondary air holes 31 on the secondary air plate 3 can provide an appropriate amount of secondary air for the combustion process, while the structural design of the side panel 1 ensures smooth airflow and uniform distribution of heat in the combustion chamber. This cooperative cooperation of the secondary air plate 3 and the side panel 1 enables the fire grate to obtain sufficient and stable oxygen supply during combustion, further promoting the full combustion, improving the combustion efficiency, and reducing the emission of harmful gases, improving the environmental performance of combustion.

[0078] As shown in Figure 1 , Figure 7 , the fire grate assembly 2 comprises a plurality of fire grate units 20, and each fire grate unit 20 comprises a gas injection pipe 22 and a fire outlet hole facing the top, and two sides of the fire outlet hole 21 are provided with flame stabilizing plates 23 extending obliquely to the top and both sides, and the included angle between the flame stabilizing plate 23 and the horizontal direction is 47°.

[0079] The setting of the flame stabilizing plate 23 at 47° not only effectively stabilizes the flame, improves the combustion efficiency and stability, but also optimizes the flow path of the secondary air, promotes the full combustion, and provides strong guarantee for the efficient, stable and environmentally friendly operation of the updraft water heater.

[0080] This design enables the flame-stabilizing plate 23 on the side of the fire grate to effectively stabilize the flame. When the gas is ejected from the fire hole 21 and ignites to form a flame, the presence of the flame-stabilizing plate 23 can prevent the flame from shifting or shaking due to air flow disturbances or other factors, thereby ensuring stable combustion of the flame. This is crucial for improving combustion efficiency, ensuring heat exchange effectiveness, and maintaining the stability of the combustion process.

[0081] At the same time, the angle between the flame-stabilizing plate 23 and the horizontal direction is controlled at 47°, which is a carefully considered design that not only ensures the stabilizing effect of the flame-stabilizing plate 23 on the flame, but also makes it easier for the secondary air to pass between the fire grates. During the combustion process, the supply of secondary air plays a key role in maintaining the sufficiency and stability of combustion. The 47° angle design allows the secondary air to flow smoothly between the fire grates, fully mixing with the gas and promoting the combustion reaction, further improving combustion efficiency, reducing harmful substances produced by incomplete combustion, and improving the environmental performance of combustion.

[0082] As shown in FIG. 1, at least one side panel 1 is provided with an inner side plate 12 and an outer side plate 11. Figures 1 to 4 As shown in FIG. 1, at least one side panel 1 is provided with an inner side plate 12 and an outer side plate 11.

[0083] The design of the fire observation window 123 and the fire observation hole 21114 provides convenience for the external observation and working state judgment of the burner. The operator can clearly observe the color, shape, height, and other characteristics of the flame, as well as the working state of the fire grate assembly 2, such as the ejection of gas, the sufficiency of combustion, etc., without directly contacting the high-temperature combustion chamber. This convenient observation method not only improves the safety of operation, but also reduces the difficulty of operation, making the daily monitoring and maintenance of the burner more efficient.

[0084] As shown in FIG. 1, the inner side plate 12 and / or the outer side plate 11 are formed by one-piece stamping to form a sandwiched inner cavity and outer and / or inner flanges.

[0085] By one-piece stamping to form a sandwiched inner cavity and outer and / or inner flanges, and using a large-area stamping design, not only the planar strength of the inner and outer side plates 11 is improved, making it able to withstand complex working conditions, but also the uniformity of the gap between the inner and outer side plates 11 is ensured, optimizing the performance of the air cooling channel.

[0086] Firstly, the middle part of the inner and outer side plates 11 is pressed in a large area, which can ensure the strength of the entire plane. During the operation of the combustion chamber, it will face complex working conditions such as high temperature, high pressure and mechanical stress generated by gas combustion. Through large-area pressing, the inner and outer side plates 11 are more solid in structure and have enough strength to withstand these stresses, thereby ensuring the stability and reliability of the combustion chamber and prolonging its service life.

[0087] Secondly, this design can also ensure the uniformity of the gap between the inner and outer side plates 11. During the one-piece stamping process, the distance between the inner and outer side plates 11 can be accurately controlled, so that the size of the sandwiched inner cavity remains consistent. Uniform gap is crucial to the performance of the air cooling channel. It ensures that the cooling air can flow smoothly and uniformly in the sandwiched inner cavity, fully absorbing the heat generated in the combustion chamber to achieve effective cooling. At the same time, the uniform gap also helps to reduce the resistance during air flow, improve cooling efficiency and ensure the stable operation of the combustion chamber under high temperature working conditions.

[0088] In this embodiment, the outer side plate 11 is made of galvanized or aluminum-plated plate. The inner side plate 12 is made of SUS430 or higher-grade stainless steel material with higher corrosion resistance. The outer side plate 11 is made of galvanized or aluminum-plated plate, and the inner side plate 12 is made of SUS430 or higher-grade stainless steel material with higher corrosion resistance, which not only effectively improves the corrosion resistance and service life of the combustion chamber, but also ensures its stability and safety in high temperature environment.

Claims

1. A combustion chamber for a top-feed water heater, characterised in that, It includes: The combustion chamber box is formed by a plurality of side panels, which define a combustion inner cavity in which a fire grate assembly is arranged, and the combustion chamber box is provided at the top with a heat exchanger and a fan communicating with the combustion inner cavity; The side panels include an inner side panel and an outer side panel connected to each other, and the inner side panel and the outer side panel have a sandwiched inner cavity therebetween, and the outer side panel and the inner side panel are respectively provided with an air inlet hole and an air outlet hole, and the air inlet hole, the air outlet hole and the sandwiched inner cavity are in communication to form an air cooling channel.

2. A combustion chamber for an updraft water heater as claimed in claim 1 wherein, The air inlet hole is arranged at the middle position of the outer side panel, and the top end and the bottom end of the inner side panel are respectively provided with a first air outlet hole and a second air outlet hole, and the air cooling channel includes a lower cooling air passage from the middle of the outer side panel downward along the sandwiched inner cavity to the second air outlet hole and an upper cooling air passage from the middle of the outer side panel upward along the sandwiched inner cavity to the first air outlet hole.

3. A combustion chamber for an updraft water heater as defined in claim 1, wherein The edge of the outer side panel is bent to form an outer bent edge, and the edge of the inner side panel has an inner bent edge in the same direction as the outer bent edge, and the outer bent edge and the inner bent edge are tightly sealed.

4. A combustion chamber for an updraft water heater as defined in claim 1, wherein A first boss is arranged on the outer side panel and protrudes towards the inner side panel, and a second boss is arranged on the inner side panel and protrudes towards the outer side panel, and the first boss and the second boss abut and are provided with a riveting hole penetrating the inner side panel and the outer side panel.

5. A combustion chamber for an updraft water heater as defined in claim 2, wherein One of the side panels is provided with a fire grate interface at the lower part, and the fire grate assembly is installed on the fire grate interface, and the second air outlet is arranged adjacent to the fire grate interface.

6. A combustion chamber for an updraft water heater as defined in claim 1, wherein The combustion chamber box further comprises a secondary air plate arranged at the bottom, and the secondary air plate connects the bottoms of the plurality of side panels and defines the combustion inner cavity, and the secondary air plate is provided with a plurality of secondary air holes, and the diameter of the secondary air holes is between 3-6mm.

7. A top-feed water heater combustion chamber as claimed in claim 6 wherein, The secondary air plate is further provided with a mounting groove, and the bottom of the fire grate assembly is fixed in the mounting groove.

8. A combustion chamber for an updraft water heater as defined in claim 1, wherein The fire grate assembly comprises a plurality of fire grate units, and each fire grate unit comprises a gas injection pipe and a fire outlet hole facing the top, and two sides of the fire outlet hole are provided with flame stabilizing plates extending upward and to both sides, and the angle between the flame stabilizing plates and the horizontal direction is 47°. And / or, An inner side panel of at least one of the side panels is provided with a fire observation window, and the outer side panel is provided with a plurality of fire observation holes.

9. A combustion chamber for an updraft water heater as defined in claim 3, wherein The inner side panel and / or the outer side panel are formed by one-piece stamping to form the sandwiched inner cavity and the outer bent edge and / or the inner bent edge.

10. The combustion chamber of the draw up water heater as claimed in claim 1, wherein, The outer side panel is made of galvanized sheet or aluminum-plated sheet; And / or, The inner side panel is made of SUS430 or a higher grade of stainless steel material with higher corrosion resistance.

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