Combustion heat exchange assembly

Abstract

The utility model belongs to the technical field of gas-fired water heating equipment, and discloses a combustion heat exchange assembly, high-temperature flue gas entering a combustion chamber shell flows to the center of the combustion chamber shell under the flow guide action of a flow guide plate, the amount of the high-temperature flue gas radiated to the periphery of the inner wall of the combustion chamber shell is reduced, and the temperature of the combustion chamber shell is reduced. After the size of the combustion chamber shell is reduced, the temperature of the combustion chamber shell is not too high, the requirement for miniaturization of the combustion chamber shell is met, meanwhile, the combustion chamber shell can be prevented from being melted, the service life of the combustion chamber shell is prolonged, the number of water inlet coils wound around the combustion chamber shell is reduced, and the cost of the heat exchanger is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas-fired water heating equipment technology, and in particular to a combustion heat exchange component. Background Technology

[0002] The heat exchanger is one of the important components of a gas water heater. The heat exchanger includes a combustion chamber shell and heat exchange tubes placed inside the combustion chamber shell. The high-temperature flue gas generated by the combustion of gas enters the combustion chamber shell. The heat exchange tubes are generally made of copper with good thermal conductivity. The heat energy in the high-temperature flue gas is transferred to the water flowing in the heat exchange tubes through the heat exchange tubes, thereby raising the temperature of the water in the heat exchange tubes.

[0003] The burner is usually located below the heat exchanger. The flue gas produced by the burner is at a high temperature, which puts the lower end of the combustion chamber shell at a high temperature environment and poses a risk of melting. Generally, coils are wound around the combustion chamber shell, and cold water flowing in the coils absorbs the heat energy on the combustion chamber shell. This not only improves the heat exchange efficiency, but also cools the combustion chamber shell.

[0004] Given the increasing demand for efficient indoor space utilization, gas water heaters are becoming more compact. Currently, the heat exchanger volume is typically reduced by shrinking the size of the combustion chamber shell. However, this results in a higher wall temperature for the combustion chamber shell at the same power output, increasing the risk of the combustion chamber shell melting.

[0005] To solve the above-mentioned technical problems, existing technologies propose to increase the number of coils surrounding the combustion chamber shell, but this will undoubtedly increase the overall cost and is not conducive to the promotion and application of gas water heaters. Utility Model Content

[0006] The technical problem solved by this utility model is to provide a combustion heat exchange component that can extend the service life of the combustion chamber shell and reduce the cost of the heat exchanger while meeting the requirements for miniaturization of the heat exchanger.

[0007] The above-mentioned technical problems are solved by the following technical solutions:

[0008] A combustion heat exchange assembly includes a combustion chamber shell and a burner located below the combustion chamber shell. A water inlet coil surrounds the outer side of the combustion chamber shell and is attached to the outer wall of the combustion chamber shell.

[0009] A guide plate is provided at the bottom inner side of the combustion chamber shell. The guide plate is located above the burner and is arranged at an angle relative to the vertical direction. Along the direction from bottom to top, the guide plate gradually approaches the central axis of the combustion chamber shell that extends in the vertical direction.

[0010] The combustion heat exchange component described in this utility model has the following advantages compared with the prior art:

[0011] The high-temperature flue gas inside the combustion chamber shell flows towards the center of the combustion chamber shell under the guidance of the baffle plate, reducing the amount of high-temperature flue gas radiating to the surrounding inner wall of the combustion chamber shell. This lowers the temperature of the combustion chamber shell, ensuring that the temperature does not become excessive even after reducing the size of the combustion chamber shell. This not only meets the miniaturization requirements of the combustion chamber shell but also prevents melting, extends its service life, and reduces the need for cooling the combustion chamber shell using water inlet coils wound around its exterior. This reduces the number of water inlet coils and lowers the cost of the combustion heat exchange components. As the flue gas flows upwards within the combustion chamber shell, its temperature tends to decrease. The bottom of the combustion chamber shell has the greatest cooling demand; therefore, the baffle plate is positioned at the bottom of the combustion chamber shell to prevent excessively high temperatures there.

[0012] In one embodiment, the lower end of the combustion chamber shell is folded outward to form a first flange, and the lower end of the guide plate is connected to a mounting plate, which is in contact with the first flange.

[0013] One of the mounting plate and the first flange is provided with a buckle hole, and the other is provided with a first protrusion, the first protrusion being embedded in the buckle hole.

[0014] In one embodiment, the buckle hole is provided on the mounting plate, and the first protrusion protrudes from the first flange;

[0015] The end of the mounting plate away from the guide plate is folded towards the side where the first flange is located to form a snap-on plate, and the first flange is sandwiched between the snap-on plate and the mounting plate.

[0016] In one embodiment, a groove is formed on the side of the first flange facing the buckle plate, and the groove and the first protrusion are arranged opposite to each other along the thickness direction of the first flange;

[0017] The surface of the buckle plate facing the first flange has a second protrusion, which is embedded in the groove.

[0018] In one embodiment, the end of the mounting plate away from the guide plate is folded toward the side opposite to the first flange to form a mounting ear;

[0019] The burner also includes a mounting housing, the upper edge of which is folded outward to form a second flange, the upper surface of which is in contact with the lower surface of the mounting plate, and the mounting lug is connected to the mounting housing.

[0020] In one embodiment, the guide vane and the inner wall of the combustion chamber housing are spaced apart to form a heat insulation gap, and the inner side of the mounting plate is bent upward to form a reinforcing plate. The reinforcing plate is located inside the combustion chamber housing, and the upper end of the reinforcing plate is connected to the lower end of the guide vane.

[0021] In one embodiment, the circumferential sidewall of the combustion chamber housing is provided with a first vent, the first vent being located at the bottom of the combustion chamber housing, and the heat insulation gap being connected to the outside atmosphere through the first vent;

[0022] Alternatively, the burner may further include a combustion unit disposed within the mounting housing, wherein an air supply channel with a top opening is formed between the outer periphery of the combustion unit and the inner wall of the mounting housing; the reinforcing plate is spaced apart from the inner wall of the combustion chamber housing, and the lower part of the reinforcing plate is provided with a second air hole that extends through it along its thickness direction; the inner cavities of the combustion chamber housing located on both sides of the thickness direction of the reinforcing plate are connected through the second air hole; and the mounting plate is located outside the inner edge of the second flange.

[0023] In one embodiment, the burner further includes a combustion unit disposed within a mounting housing, wherein an air supply channel with a top opening is formed between the outer periphery of the combustion unit and the inner wall of the mounting housing;

[0024] The guide plate is spaced apart from the inner wall of the combustion chamber shell. A second air hole is provided at one end of the guide plate connected to the mounting plate. The second air hole is arranged through the thickness direction of the guide plate and is located outside the inner edge of the second flange.

[0025] In one embodiment, two mounting plates are provided, and the two mounting plates are arranged end to end along the circumference of the combustion chamber shell; the mounting plate has a U-shaped structure, and guide plates are connected to three sides of the mounting plate, and the mounting plate and the guide plates connected thereto are integrally formed.

[0026] In one embodiment, the combustion heat exchange assembly further includes a heat exchanger, the heat exchanger including a heat exchange tube and a heat exchange shell located above and in communication with the combustion chamber shell, the heat exchange tube being at least partially located within the heat exchange shell; the water inlet end of the heat exchange tube is connected to the water outlet end of the water inlet coil, and the combustion chamber shell is integrally formed with the combustion chamber shell.

[0027] In one embodiment, guide vanes are arranged on both the left and right sides of the combustion chamber shell, and guide vanes are arranged on both the front and rear sides of the combustion chamber shell. The width of the guide vane located on either the left or right side of the combustion chamber shell is L1, and the width of the guide vane located on either the front or rear side of the combustion chamber shell is L2, where L1 is greater than L2. Attached Figure Description

[0028] Figure 1 This is a side view of the combustion heat exchange assembly provided in an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of the combustion heat exchange component provided in an embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of a heat exchanger with a connection structure provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the combustion chamber shell provided in an embodiment of the present invention;

[0032] Figure 5 This is a cross-sectional view of a heat exchanger with a connecting structure installed according to an embodiment of this utility model;

[0033] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle;

[0034] Figure 7 This is a schematic diagram of the connection structure provided in an embodiment of the present utility model;

[0035] Figure 8 yes Figure 3 A magnified view of a portion of point B in the middle;

[0036] Figure 9 yes Figure 2 A magnified view of a portion of point C in the middle;

[0037] Figure 10 This is a partial cross-sectional view of the combustion heat exchange assembly provided in this embodiment of the utility model when the second vent is provided on the reinforcing plate.

[0038] In the picture:

[0039] 1. Combustion chamber shell; 11. First flange; 111. First bulge; 12. First air vent;

[0040] 2. Connecting structure; 21. Guide plate; 22. Mounting plate; 221. Buckle hole; 23. Buckle edge plate; 231. Second protrusion; 24. Reinforcing plate; 241. Second air hole; 25. Mounting ear;

[0041] 3. Heat exchanger; 31. Heat exchange tube; 32. Heat exchange shell; 33. Heat exchange fins; 34. Inlet water coil;

[0042] 100, Insulation gap; 200, Burner; 201, Mounting housing; 2011, Second flange; 202, Burner blade; 300, Water inlet pipe; 400, Water outlet pipe; 500, Air supply channel. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] This utility model provides a combustion heat exchange component that, while meeting the miniaturization requirements of combustion heat exchange components, extends the service life of the combustion chamber shell and reduces the cost of the combustion heat exchange component. The combustion heat exchange component is applied to gas-fired water heating equipment, such as gas water heaters, wall-hung boilers, and boilers. The following description uses a gas water heater as an example. It should be noted that, in the embodiments described below, the side of a structural member closer to the center of the combustion chamber shell is defined as the inner side of the structural member, and the side of a structural member away from the center of the combustion chamber shell is defined as the outer side of the structural member.

[0048] like Figure 1 and Figure 2 As shown, the combustion heat exchange assembly includes a combustion chamber shell 1, a heat exchanger 3, and a burner 200. The heat exchanger 3 includes a heat exchange shell 32, a water inlet coil 34, and a heat exchange tube 31. The heat exchange shell 32 and the burner 200 are located below the combustion chamber shell 1. The heat exchange shell 32 is located above the combustion chamber shell 1 and communicates with it. The water inlet coil 34 surrounds the combustion chamber shell 1 and is attached to the outer wall of the combustion chamber shell 1. The heat exchange tube 31 is at least partially located inside the heat exchange shell 32. The inlet end of the heat exchange tube 31 is connected to the outlet end of the water inlet coil 34. The outlet of the heat exchange tube 31 is connected to a water outlet pipe 400, and the inlet end of the water inlet coil 34 is connected to a water inlet pipe 300.

[0049] The burner 200 includes a mounting housing 201 and a combustion unit disposed within the mounting housing 201. The upper end of the mounting housing 201 is fixedly connected to the lower end of the combustion chamber housing 1, and the inner cavity of the mounting housing 201 communicates with the inner cavity of the combustion chamber housing 1. The combustion unit mainly refers to a single burner blade 202. One burner blade 202 can be arranged, or multiple burner blades 202 can be arranged side-by-side; this is prior art in the field and will not be described in detail here.

[0050] When the burner 200 is in operation, the high-temperature flue gas generated by the combustion of the gas enters the combustion chamber shell 1 through the top opening of the mounting shell 201. The high-temperature flue gas flows through the heat exchange tube 31, which absorbs the heat energy from the high-temperature flue gas, causing the water flowing inside the heat exchange tube 31 to heat up. At the same time, the high-temperature flue gas heats up the combustion chamber shell 1. The cold water flowing in the water inlet coil 34 surrounding the combustion chamber shell 1 absorbs the heat energy from the combustion chamber shell 1 and heats up, thus lowering the temperature of the combustion chamber shell 1. After the water in the water inlet coil 34 heats up by exchanging heat with the combustion chamber shell 1, it enters the heat exchange tube 31 to further absorb the heat energy from the high-temperature flue gas and heat up. The simultaneous installation of the water inlet coil 34 and the heat exchange tube 31 can improve the heat exchange efficiency and reduce the heat energy dissipated through the combustion chamber shell 1 by the water inlet coil 34.

[0051] To improve heat exchange efficiency, the heat exchanger 3 also includes multiple heat exchange fins 33 located within the heat exchange shell 32. These fins 33 are fixedly sleeved on the outer periphery of the heat exchange tube 31 and are arranged sequentially at intervals along the extension direction of the heat exchange tube 31. This allows the water within the heat exchange tube 31 to fully absorb the heat energy from the flue gas, thereby improving heat exchange efficiency. It should be noted that the arrangement of the heat exchange tube 31 within the combustion chamber shell 1 is existing technology in the field and will not be described in detail here.

[0052] like Figure 3 As shown, the combustion heat exchange assembly provided by this utility model also includes a guide plate 21. The guide plate 21 is located at the bottom inner side of the combustion chamber shell 1. The guide plate 21 is arranged at an angle relative to the vertical direction. Along the direction from bottom to top, the guide plate 21 gradually approaches the central axis of the combustion chamber shell 1 extending in the vertical direction.

[0053] The high-temperature flue gas inside the combustion chamber shell 1 flows towards the center of the combustion chamber shell 1 under the guidance of the baffle plate 21, reducing the amount of high-temperature flue gas radiating to the inner wall of the combustion chamber shell 1, thereby lowering the temperature of the combustion chamber shell 1. This ensures that the temperature of the combustion chamber shell 1 does not become too high even after its size is reduced, meeting the miniaturization requirements of the combustion chamber shell 1 while preventing it from melting and extending its service life. Correspondingly, it also reduces the need for cooling the combustion chamber shell 1 using the water inlet coil 34 wound around the outside of the combustion chamber shell 1, which helps to reduce the number of water inlet coils 34 wound around the outside of the combustion chamber shell 1 and reduce the cost of the heat exchanger 3. As the flue gas enters the combustion chamber shell 1, its temperature tends to decrease during upward flow. The cooling demand is greatest at the bottom of the combustion chamber shell 1. The baffle plate 21 is set at the bottom of the combustion chamber shell 1 to prevent the temperature at the bottom of the combustion chamber shell 1 from becoming too high.

[0054] In some embodiments, the heat exchange shell 32 and the combustion chamber shell 1 are integrally formed, which can simplify processing, reduce processing costs, and improve processing efficiency.

[0055] In some embodiments, such as Figures 4 to 6 As shown, the lower end of the combustion chamber shell 1 is folded outward to form a first flange 11, and the lower end of the guide plate 21 is connected to a mounting plate 22, which is in contact with the first flange 11.

[0056] The mounting plate 22, formed by folding the lower end of the guide plate 21 outward, is in contact with the first flange 11 to seal the connection between the mounting plate 22 and the first flange 11. This allows the high-temperature flue gas that has just entered the combustion chamber shell 1 to be guided by the guide plate 21 to flow towards the center of the combustion chamber shell 1. This helps to prevent the high-temperature flue gas near the bottom of the combustion chamber shell 1 from radiating outward to the inner wall of the combustion chamber shell 1, thereby reducing the temperature of the combustion chamber shell 1 and preventing the combustion chamber shell 1 from melting due to heat.

[0057] As an alternative, a connecting part can be provided between the guide plate 21 and the inner wall of the combustion chamber shell 1. The guide plate 21 is installed on the inner wall of the combustion chamber shell 1 through the connecting part. In this case, a vertically continuous flue gas channel is formed between the guide plate 21 and the inner wall of the combustion chamber shell 1. However, since the guide plate 21 is inclined relative to the vertical direction, the guide plate 21 guides most of the high-temperature flue gas to the center of the combustion chamber shell 1. A small amount of high-temperature flue gas flows upward through the flue gas channel. The heat energy of this part of the high-temperature flue gas can be transferred to the water in the water inlet coil 34 through the combustion chamber shell 1 to heat the water in the water inlet coil 34. It should be noted that this solution requires controlling the minimum distance between the guide plate 21 and the inner wall of the combustion chamber shell 1 to avoid excessive high-temperature gas flowing in the flue gas channel, which would cause the combustion chamber shell 1 to heat up and melt. This minimum distance is related to the size of the combustion chamber shell 1, the tilt angle of the guide plate 21, and the maximum power of the gas water heater. This minimum distance can be determined through repeated experiments and will not be specifically limited here.

[0058] In some embodiments, such as Figures 6 to 8 As shown, one of the mounting plate 22 and the first flange 11 is provided with a buckle hole 221, and the other is provided with a first protrusion 111, which is embedded in the buckle hole 221.

[0059] For example, a snap hole 221 is provided on the mounting plate 22, and a first protrusion 111 is provided on the first flange 11. The first protrusion 111 is embedded in the snap hole 221, so that the mounting plate 22 is connected to the first flange 11, thereby the guide plate 21 is installed on the combustion chamber housing 1 through the mounting plate 22.

[0060] As an alternative, the buckle hole 221 can be located on the first flange 11, and the first protrusion 111 can be located on the mounting plate 22.

[0061] In some embodiments, such as Figure 6 and Figure 8 As shown, the first protrusion 111 is completely located within the buckle hole 221. When the buckle hole 221 is set on the mounting plate 22 and the first protrusion 111 is set on the first flange 11, the first protrusion 111 is completely set within the buckle hole 221, which facilitates the subsequent fitting and fixing of the top surface of the mounting housing 201 and the lower surface of the mounting plate 22.

[0062] In some embodiments, such as Figure 6As shown, taking the mounting plate 22 with a snap hole 221 and a first protrusion 111 protruding from the first flange 11 as an example, the end of the mounting plate 22 away from the guide plate 21 is folded towards the side where the first flange 11 is located to form a snap-edge plate 23. The first flange 11 is sandwiched between the snap-edge plate 23 and the mounting plate 22. With this configuration, the snap-edge plate 23 presses the first flange 11 tightly against the mounting plate 22, thereby keeping the first protrusion 111 embedded in the snap hole 221, preventing the first protrusion 111 from slipping out of the snap hole 221, and improving the connection stability between the mounting plate 22 and the combustion chamber housing 1.

[0063] As an alternative, when the buckle hole 221 is provided on the first flange 11 and the first protrusion 111 is provided on the mounting plate 22, the outer edge of the first flange 11 can also be folded toward the side where the mounting plate 22 is located to form a buckle plate 23, and the mounting plate 22 is sandwiched between the buckle plate 23 and the first flange 11.

[0064] In some embodiments, such as Figure 6 and Figure 7 As shown, a groove is formed on the side of the first flange 11 facing the fastening plate 23, and the groove and the first protrusion 111 are arranged opposite to each other along the thickness direction of the first flange 11; a second protrusion 231 is provided on the surface of the fastening plate 23 facing the first flange 11, and the second protrusion 231 is embedded in the groove.

[0065] With this configuration, the second protrusion 231 is embedded in the groove, so that the snap-edge plate 23 is pressed against the side of the first flange 11 facing away from the mounting plate 22, thereby clamping the first flange 11 between the snap-edge plate 23 and the mounting plate 22; moreover, the groove and the first protrusion 111 are arranged opposite each other along the thickness direction of the first flange 11, which is beneficial to use the snap-edge plate 23 to press the first flange 11 so that the first protrusion 111 is more stably embedded in the snap hole 221.

[0066] Specifically, the edge plate 23 has a first side and a second side disposed opposite to each other along its thickness direction. The first side is stamped in the direction from the first side to the second side, so that the second side forms a protruding second protrusion 231. Not only is the processing method of the second protrusion 231 simple, but it can also improve the structural strength of the edge plate 23.

[0067] like Figure 7 As shown, before installing the mounting plate 22 onto the combustion chamber housing 1, snap holes 221 are pre-machined on the mounting plate 22. The snap-on plate 23 and the mounting plate 22 are arranged at an angle, and the first flange 11 does not yet have a first protrusion 111. Figure 6As shown, the guide plate 21 is placed inside the combustion chamber housing 1, and the upper surface of the mounting plate 22 is attached to the lower surface of the first flange 11. Then, the flange plate 23 is flipped over, gradually reducing the angle between the flange plate 23 and the mounting plate 22 until the flange plate 23 is pressed tightly against the mounting plate 22. During the process of flipping the flange plate 23 to press the flange plate 23 against the mounting plate 22, the second protrusion 231 presses down on the first flange 11, forming a groove on the side of the first flange 11 facing the flange plate 23, and forming a first protrusion 111 on the side of the first flange 11 facing away from the flange plate 23. The first protrusion 111 is continuously pressed into the buckle hole 221 until the flange plate 23 is pressed tightly against the side of the first flange 11 facing away from the mounting plate 22. The installation method of the mounting plate 22 and the combustion chamber housing 1 is simple, and the connection stability between the mounting plate 22 and the combustion chamber housing 1 is strong.

[0068] It should be noted that the first flange 11 can also be stamped in advance to form the above-mentioned groove and the first protrusion 111.

[0069] In some embodiments, such as Figure 3 , Figure 6 and Figure 7 As shown, the inner edge of the mounting plate 22 is bent upward to form a reinforcing plate 24. The reinforcing plate 24 is located inside the combustion chamber housing 1, and the lower end of the guide plate 21 is connected to the upper end of the reinforcing plate 24. The reinforcing plate 24 is used to strengthen the structural strength of the bottom periphery of the combustion chamber housing 1.

[0070] In some embodiments, such as Figure 7 and Figure 9 As shown, the end of the mounting plate 22 away from the guide plate 21 is folded away from the first flange 11 to form a mounting ear 25; the circumferential edge of the upper end of the mounting housing 201 is folded outward to form a second flange 2011, the upper surface of the second flange 2011 and the lower surface of the mounting plate 22 are fitted together to seal the connection position of the mounting plate 22 and the second flange 2011 to prevent smoke leakage; the mounting ear 25 is connected to the mounting housing 201, realizing the connection between the combustion chamber housing 1 and the mounting housing 201 by means of the mounting plate 22. Exemplarily, the mounting ear 25 is connected to the mounting housing 201 by fasteners.

[0071] In some embodiments, such as Figure 3 and Figure 7 As shown, multiple mounting ears 25 are provided, and the multiple mounting ears 25 are arranged at intervals along the circumference of the combustion chamber housing 1 to improve the connection stability between the mounting plate 22 and the mounting housing 201.

[0072] For example, two mounting ears 25 are provided on each of the opposite sides of the combustion chamber housing 1 in the width direction, and the two mounting ears 25 located on the same side of the combustion chamber housing 1 are arranged at intervals along the length direction of the combustion chamber housing 1; each mounting ear 25 is provided with a snap-on plate 23 on both sides of the circumference of the combustion chamber housing 1, which can improve the connection stability between the mounting plate 22 and the mounting housing 201.

[0073] In summary, the combustion chamber housing 1 is connected to the mounting housing 201 via the connecting structure 2. Specifically, the connecting structure 2 includes the aforementioned mounting plate 22, the aforementioned snap-on plate 23, and the aforementioned mounting ear 25. The mounting ear 25 and the snap-on plate 23 are both connected to the mounting plate 22. The mounting plate 22 is connected to the mounting housing 201 via the mounting ear 25, and the mounting plate 22 is connected to the combustion chamber housing 1 via the snap-on plate 23.

[0074] In some embodiments, such as Figure 3 and Figure 7 As shown, there are two mounting plates 22, which are arranged end-to-end along the circumference of the combustion chamber shell 1. This arrangement not only facilitates the independent installation of each connecting structure 2 on the combustion chamber shell 1 and the mounting shell 201, but also prevents gaps between the mounting plates 22 of at least two connecting structures 2 along the circumference of the combustion chamber shell 1, thus preventing the high-temperature flue gas between the guide plate 21 and the inner wall of the combustion chamber shell 1 from escaping outward through these gaps.

[0075] Specifically, the horizontal cross-section of the combustion chamber housing 1 is roughly rectangular. Two mounting plates 22 are attached end to end along the circumference of the combustion chamber housing 1 to form a rectangular ring. The reinforcing plate 24 connected by the two mounting plates 22 is attached end to end along the circumference of the combustion chamber housing 1 to form a rectangular ring, so as to ensure that the bottom of the combustion chamber housing 1 is reinforced.

[0076] In one embodiment, such as Figure 3 and Figure 7 As shown, the mounting plate 22 has a U-shaped structure, and guide plates 21 are connected to three sides of the mounting plate 22. The mounting plate 22 and the guide plates 21 connected to it are integrally formed. Exemplarily, the connecting structure 2 is an integrally formed structure, which simplifies the processing of the connecting structure 2, reduces processing costs, and improves processing efficiency.

[0077] Because the burner blade 202 of the combustion unit is oriented horizontally along its length, and multiple burner blades 202 are arranged in a front-to-back direction, with the flame holes of the burner blades extending in the front-to-back direction and arranged horizontally, the flames from the flame holes at both ends of the burner blades tend to disperse outwards more easily. This makes the left and right side walls of the combustion chamber shell 1 more likely to come into contact with the flame, resulting in higher temperatures. Therefore, the cooling and insulation requirements for the left and right side walls of the combustion chamber shell 1 are higher. To address this, in one embodiment, as... Figure 3 and Figure 7 As shown, guide vanes 21 are arranged on both the left and right sides of the combustion chamber shell 1, and guide vanes 21 are arranged on both the front and rear sides of the combustion chamber shell 1. The width of the guide vane 21 on either the left or right side of the combustion chamber shell 1 is L1, and the width of the guide vane 21 on either the front or rear side of the combustion chamber shell 1 is L2. L1 is greater than L2, so that the flames that are dispersed outward in the left and right directions can be concentrated, effectively reducing the temperature of the left and right side walls of the combustion chamber shell.

[0078] It should be noted that the width direction of the guide plate 21 located on either the left or right side of the combustion chamber housing 1 is perpendicular to the front-back direction and the thickness direction of the guide plate 21, and the width direction of the guide plate 21 located on either the front or back side of the combustion chamber housing 1 is perpendicular to the left-right direction and the thickness direction of the guide plate 21.

[0079] In one embodiment, an air supply channel 500 with a top opening is formed between the outer periphery of the combustion unit and the inner wall of the mounting housing 201 for secondary air supply to the inner cavity of the mounting housing 201 to meet combustion requirements. Figure 6 As shown, in the embodiment where the guide plate 21 is connected to the mounting plate 22 via the reinforcing plate 24, the reinforcing plate 24 is spaced apart from the inner wall of the combustion chamber housing 1. The lower part of the reinforcing plate 24 is provided with a second air hole 241 that is arranged through it along its thickness direction. The inner cavity of the combustion chamber housing 1 located on both sides of the thickness direction of the reinforcing plate 24 is connected through the second air hole 241. The mounting plate 22 is located outside the inner edge of the second flange 2011.

[0080] The gas-fired water heater used in the above-mentioned combustion heat exchange component is a forced-draft type gas-fired water heater. The air in the air supply channel 500 flows upward, and part of the secondary supply air flows outward to the reinforcing plate 24. It enters the gap between the mounting plate 22 and the inner wall of the combustion chamber shell 1 through the second air hole 241 on the reinforcing plate 24, and then flows upward into the gap between the guide plate 21 and the inner wall of the combustion chamber shell 1, which plays a role in cooling the wall surface of the combustion chamber shell 1 and further improving the cooling effect of the combustion chamber shell 1.

[0081] In another embodiment, an air supply channel 500 with a top opening is formed between the outer periphery of the combustion unit and the inner wall of the mounting housing 201 for secondary air supply to the inner cavity of the mounting housing 201 to meet combustion requirements. The guide plate 21 is spaced apart from the inner wall of the combustion chamber housing 1. A second air hole 241 is provided at one end of the guide plate 21 connected to the mounting plate 22. The second air hole 241 is arranged through the guide plate 21 along its thickness direction and is located outside the inner edge of the second flange 2011. This embodiment addresses a scheme where the lower end of the guide plate 21 is directly connected to the inner edge of the mounting plate 22, i.e., the reinforcing plate 24 is eliminated. In other words, after eliminating the reinforcing plate 24, the second air hole 241 is opened at the lower part of the guide plate 21.

[0082] The gas-fired water heater used in the above-mentioned combustion heat exchange component is a forced-draft type gas-fired water heater. The air in the air supply channel 500 flows upward, and part of the secondary supply air flows outward to the guide plate 21 and enters the gap between the guide plate 21 and the inner wall of the combustion chamber shell 1 through the second air hole 241 on the guide plate 21. Then it flows upward, which plays a role in cooling the wall of the combustion chamber shell 1 and further improves the cooling effect of the combustion chamber shell 1.

[0083] It should be noted that when the forced-draft gas water heater is working, the air required for combustion is sent into the mounting housing 201 and the combustion chamber housing 1 by a fan, so that the mounting housing 201 and the combustion chamber housing 1 are in a positive pressure state.

[0084] In some embodiments, to facilitate the entry of secondary supply air flowing from the top of the air supply channel 500 into the second air vent 241, the circumferential sidewall of the combustion chamber housing 1 and the connected second flange 2011 are connected by a guide surface. Along the upward direction, the distance between the guide surface and the central axis of the combustion chamber housing 1 extending vertically gradually increases. Exemplarily, the guide surface is a rounded chamfered surface. Alternatively, the guide surface can also be a beveled chamfered surface.

[0085] In some embodiments, in order to facilitate the entry of secondary supply air flowing out from the top of the air supply channel 500 into the second air hole 241, the second air hole 241 is arranged at an angle, with one end of the second air hole 241 closer to the central axis extending vertically in the combustion chamber housing 1 being lower than the other end.

[0086] In some embodiments, the connecting structure 2 is an integral structure, which simplifies the processing of the connecting structure 2 and reduces processing costs.

[0087] In some embodiments, the connecting structure 2 is made of stainless steel, which reduces the cost of the connecting structure 2. Moreover, the thermal conductivity of the stainless steel connecting structure 2 is relatively low compared to aluminum, copper, etc., which makes it difficult for the heat energy on the guide plate 21, which is in direct contact with the high-temperature flue gas, to be transferred to the second flange 2011 that is in contact with the mounting plate 22.

[0088] In some embodiments, such as Figure 10 As shown, the guide plate 21 and the inner wall of the combustion chamber shell 1 are arranged at intervals to form a heat insulation gap 100. This heat insulation gap 100 separates the high-temperature airflow that has just entered the combustion chamber shell 1 from the inner wall of the combustion chamber shell 1, so as to prevent the high-temperature airflow entering the combustion chamber shell 1 from directly impacting the inner wall of the combustion chamber shell 1 and causing the combustion chamber shell 1 to melt.

[0089] In some embodiments, such as Figure 10 As shown, the circumferential sidewall of the combustion chamber shell 1 is provided with a first air hole 12. The first air hole 12 is located at the bottom of the combustion chamber shell 1, and the heat insulation gap 100 is connected to the outside atmosphere through the first air hole 12.

[0090] The gas-fired water heater used in the aforementioned combustion heat exchange components is a forced-draft type. When the forced-draft type gas-fired water heater is operating, both the mounting housing 201 and the combustion chamber housing 1 are under negative pressure. Outside air enters the insulation gap 100 through the first vent 12 and then flows upwards. This not only provides secondary air supply to the interior of the combustion chamber housing 1 through the first vent 12 to meet combustion requirements, but also cools the walls of the combustion chamber housing 1, further improving the cooling effect. It should be noted that when the forced-draft type gas-fired water heater is operating, the high-temperature flue gas generated by the combustion of the burner 200 flows through the combustion chamber housing 1 and the heat exchanger 3. After exchanging heat with the heat exchanger 3, it flows into the fume hood housing above the heat exchanger 3. A fan is connected to the outlet of the fume hood housing. Under the suction of the fan, the flue gas inside the fume hood housing is discharged outwards, resulting in a negative pressure state throughout the combustion chamber housing 1 and the mounting housing 201.

[0091] In the embodiment where the guide plate 21 is connected to the mounting plate 22 via the reinforcing plate 24, the first vent 12 is positioned opposite the reinforcing plate 24 and located at the end where the reinforcing plate 24 is connected to the mounting plate 22. To ensure communication between the first vent 12 and the heat insulation gap 100, the reinforcing plate 24 and the inner wall of the combustion chamber housing 1 are spaced apart. Air drawn in by the first vent 12 enters the gap between the reinforcing plate 24 and the inner wall of the combustion chamber housing 1, and then flows upward into the heat insulation gap 100. In the embodiment where the reinforcing plate 24 is omitted and the guide plate 21 is directly connected to the mounting plate 22, the first vent 12 is positioned opposite the guide plate 21 and located at the end where the guide plate 21 is connected to the mounting plate 22.

[0092] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0093] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A combustion heat exchange assembly, characterized by, The application relates to a combustion chamber shell (1) and a burner (200) arranged below the combustion chamber shell (1), wherein a water inlet coil (34) is arranged around the outer wall of the combustion chamber shell (1) and adheres to the outer wall of the combustion chamber shell (1). A guide plate (21) is arranged at the bottom of the inner side of the combustion chamber shell (1) and is arranged above the burner (200), wherein the guide plate (21) is arranged to be inclined relative to the vertical direction and gradually approaches the central axis of the combustion chamber shell (1) extending in the vertical direction from the bottom to the top.

2. The combustion heat exchange assembly of claim 1, wherein, The lower end of the combustion chamber shell (1) is outwardly folded to form a first flange (11), and the lower end of the guide plate (21) is connected with a mounting plate (22) which adheres to the first flange (11). One of the mounting plate (22) and the first flange (11) is provided with a buckle hole (221), and the other is provided with a first convex block (111), and the first convex block (111) is embedded in the buckle hole (221).

3. The combustion heat exchange assembly of claim 2, wherein, The buckle hole (221) is arranged on the mounting plate (22), and the first convex block (111) is arranged on the first flange (11). The end of the mounting plate (22) away from the guide plate (21) is outwardly folded to form a buckle plate (23) on the side of the first flange (11), and the first flange (11) is clamped between the buckle plate (23) and the mounting plate (22).

4. The combustion heat exchange assembly of claim 3, wherein, The side of the first flange (11) facing the buckle plate (23) is provided with a groove, and the groove and the first convex block (111) are arranged opposite to each other along the thickness direction of the first flange (11). The surface of the buckle plate (23) facing the first flange (11) is provided with a second convex block (231), and the second convex block (231) is embedded in the groove.

5. The combustion heat exchange assembly of claim 2, wherein, The end of the mounting plate (22) away from the guide plate (21) is outwardly folded to form a mounting lug (25) on the side away from the first flange (11). The burner (200) comprises a mounting shell (201), and the upper edge of the mounting shell (201) is outwardly folded to form a second flange (2011), the upper surface of the second flange (2011) adheres to the lower surface of the mounting plate (22), and the mounting lug (25) is connected to the mounting shell (201).

6. The combustion heat exchange assembly of claim 5, wherein, The guide plate (21) and the inner wall of the combustion chamber shell (1) are arranged to be spaced apart to form a heat insulation gap (100), the inner side of the mounting plate (22) is upwardly bent to form a reinforcing plate (24), the reinforcing plate (24) is arranged in the combustion chamber shell (1), and the upper end of the reinforcing plate (24) is connected with the lower end of the guide plate (21).

7. The combustion heat exchange assembly of claim 6, wherein, The circumferential side wall of the combustion chamber shell (1) is provided with a first air hole (12), the first air hole (12) is arranged at the bottom of the combustion chamber shell (1), and the heat insulation gap (100) is connected with the external atmosphere through the first air hole (12). Or, the combustor (200) further comprises a combustion unit arranged in the mounting shell (201), and an air supply channel (500) with a top opening is formed between the outer periphery of the combustion unit and the inner wall of the mounting shell (201); the reinforcing plate (24) is arranged in space from the inner wall of the combustion chamber shell (1), and the lower part of the reinforcing plate (24) is provided with a second air hole (241) arranged through the thickness direction of the reinforcing plate (24), and the inner cavities of the combustion chamber shell (1) on both sides of the thickness direction of the reinforcing plate (24) are communicated through the second air hole (241); the mounting plate (22) is located outside the inner edge of the second flange (2011).

8. The combustion heat exchange assembly of claim 5, wherein, The combustor (200) further comprises a combustion unit arranged in the mounting shell (201), and an air supply channel (500) with a top opening is formed between the outer periphery of the combustion unit and the inner wall of the mounting shell (201); The flow guide plate (21) is arranged in space from the inner wall of the combustion chamber shell (1), and the second air hole (241) is arranged through the thickness direction of the flow guide plate (21) and located outside the inner edge of the second flange (2011).

9. The combustion heat exchanger assembly of any of claims 2 to 8, wherein, The mounting plate (22) is provided with two, and the two mounting plates (22) are arranged in end-to-end abutting mode along the circumference of the combustion chamber shell (1); the mounting plate (22) is in U-shaped structure, and the three side edges of the mounting plate (22) are connected with the flow guide plate (21), and the mounting plate (22) and the flow guide plate (21) connected therewith are integrally formed.

10. The combustion heat exchanger assembly of any of claims 2 to 8, wherein, The combustion heat exchange assembly further comprises a heat exchanger (3), the heat exchanger (3) comprises a heat exchange pipe (31) and a heat exchange shell (32) located above the combustion chamber shell (1) and communicated with the combustion chamber shell (1), and the heat exchange pipe (31) is at least partially located in the heat exchange shell (32); the water inlet end of the heat exchange pipe (31) is connected with the water outlet end of the water inlet coil pipe (34), and the heat exchange shell (32) is integrally formed with the combustion chamber shell (1).

11. The combustion heat exchanger assembly of any of claims 2 to 8, wherein, The flow guide plates (21) are arranged on the left and right sides of the combustion chamber shell (1), and the flow guide plates (21) are arranged on the front and rear sides of the combustion chamber shell (1), the width of the flow guide plate (21) located on any one side of the left and right sides of the combustion chamber shell (1) is L1, the width of the flow guide plate (21) located on any one side of the front and rear sides of the combustion chamber shell (1) is L2, and L1 is greater than L2.

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