Combustion heat exchange assembly and gas water heater

Abstract

The invention relates to the technical field of household appliance equipment, in particular to a combustion heat exchange assembly and a gas water heater, the combustion heat exchange assembly comprises a combustor used for forming flames, and the combustor is provided with a combustion port for spraying the flames outwards; the heat exchanger is arranged above the combustor and comprises a heat exchange shell, a heat exchange pipeline and heat exchange fins, a heat exchange channel is arranged in the heat exchange shell, the heat exchange pipeline is provided with a heat exchange part arranged in the heat exchange channel, and the heat exchange fins are arranged in the heat exchange channel and attached to the heat exchange part; the smoke guide shell is internally provided with a smoke guide channel which is communicated with the combustion opening and upwards discharges smoke generated by combustion into the heat exchange channel, and a lower end opening of the smoke guide channel is connected with the combustion opening so that a combustion area for flame combustion can be formed in the smoke guide channel. A heat resisting structure is formed in the side wall of the smoke guiding channel. According to the combustion heat exchange assembly, heat can be prevented from being dissipated outwards through a simple structure, and the combustion heat exchange assembly is higher in economical efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and more specifically to a combustion heat exchange component and a gas water heater. Background Art

[0002] A gas water heater is a household device that releases heat energy by burning gas and uses a heat exchange device to conduct heat to water flow to achieve rapid heating. A typical gas water heater includes several core modules: a combustion heat exchange component (including a combustion component that generates high-temperature flames and a heat exchanger that realizes gas-water heat conduction through finned heat exchange tubes), a fan system (including components such as a turbo fan), and supporting pipelines and electrical control components.

[0003] In the prior art solutions, in order to reduce the impact of the high-temperature flames generated during the operation of the combustion heat exchange component on the surrounding electrical components, two heat dissipation methods are generally adopted: one is to set a circulating water cooling device on the outer wall of the combustion chamber, and the other is to install an active air cooling system on the periphery. However, it is found in actual applications that:

[0004] For the water-cooled heat dissipation solution, its water pipeline needs to be arranged in a multi-dimensional and three-dimensional manner with the combustion chamber, resulting in a complex structure and a cumbersome installation process; in order to prevent coolant leakage and oxidation and corrosion of metal pipelines, high-seal-grade pipes and surface treatment processes must be used, significantly increasing the manufacturing cost; there is a risk of scaling during long-term operation, affecting the heat dissipation efficiency and having a high maintenance cost.

[0005] For the active air cooling system, because an independent fan component needs to be configured, it not only generates additional equipment procurement costs, but also requires a dedicated air duct and an independent control circuit, resulting in an increase in the overall assembly complexity of the machine.

[0006] That is, both of the above two traditional heat dissipation methods have technical bottlenecks such as complex structures, high production costs, and poor economy. Summary of the Invention

[0007] One of the purposes of the present invention is to provide, in view of the deficiencies of the prior art, a combustion heat exchange component that combines the combustion characteristics of gas and can block heat from dissipating outward through a simple structure and has higher economy.

[0008] Another purpose of the invention is to provide a gas water heater having the above combustion heat exchange component.

[0009] The technical solution of the present invention is as follows:

[0010] The combustion heat exchange component includes:

[0011] A burner for forming a flame, the burner having a combustion port for the flame to spray outwards;

[0012] A heat exchanger placed above the burner, which includes a heat exchange housing, heat exchange pipes, and heat exchange fins. There is a heat exchange channel in the heat exchange housing. The heat exchange pipes have heat exchange portions placed in the heat exchange channel, and the heat exchange fins are placed in the heat exchange channel and are in contact with the heat exchange portions;

[0013] A smoke guiding housing detachably fixed to the burner, which has: a smoke guiding channel connected to the combustion port and discharging the smoke generated by combustion upward into the heat exchange channel. The lower end opening of the smoke guiding channel is connected to the combustion port so that a combustion area for the flame to burn is formed in the smoke guiding channel;

[0014] A heat insulation structure is formed in the side wall of the smoke guiding channel. The heat insulation structure includes:

[0015] A heat insulation cavity arranged in the side wall of the smoke guiding channel;

[0016] An air outlet channel for communicating the heat insulation cavity with the smoke guiding channel;

[0017] An air inlet channel connected to the upper end region of the heat insulation cavity and for communicating the heat insulation cavity with the external air.

[0018] In some solutions, the air outlet channel is connected to the lower end region of the heat insulation cavity.

[0019] In some solutions, one end of the air outlet channel far from the heat insulation cavity is arranged opposite to the combustion area so that the airflow output from the air outlet channel can be transported to the combustion area of the smoke guiding channel.

[0020] In some solutions, the heat exchange fins include a fin body, which has at least two insertion tube holes, and the two insertion tube holes are arranged at intervals in the transverse direction;

[0021] The heat exchange pipes extend in a curved manner and sequentially pass through the two insertion tube holes;

[0022] One side surface of the fin body has a raised smoke blocking structure, which is placed in the middle area between the two insertion tube holes and drives the smoke flowing from bottom to top to flow towards the insertion tube holes on both sides of it.

[0023] In some solutions, the smoke blocking structure includes: a first smoke blocking portion, a second smoke blocking portion, and a third smoke blocking portion arranged at intervals from bottom to top;

[0024] In the direction from bottom to top, the width dimensions of the first smoke blocking portion, the second smoke blocking portion, and the third smoke blocking portion gradually increase.

[0025] In some solutions, in the vertical direction, the first smoke blocking portion is configured to be lower than the centers of the two insertion tube holes.

[0026] In some solutions, in the vertical direction, the third smoke blocking portion is configured to be higher than the two insertion tube holes;

[0027] Moreover, the lower end surface of the third smoke-blocking part is an arc surface protruding downward.

[0028] In some solutions, the second smoke-blocking part includes:

[0029] A first guide plate extending obliquely, which is configured to guide the flue gas flowing from bottom to top to the upper end of an insertion hole;

[0030] A second guide plate extending obliquely, which is configured to guide the flue gas flowing from bottom to top to the upper end of another insertion hole;

[0031] Moreover, the lower end of the first guide plate is close to or in contact with the lower end of the second guide plate.

[0032] In some solutions, a diversion part protruding into the smoke guide channel is provided on the side wall of the smoke guide channel;

[0033] The inside of the diversion part is provided as a cavity and is communicated with the heat-resistant cavity;

[0034] Moreover, the outer wall of the diversion part includes:

[0035] A diversion wall facing the combustion port, which is obliquely arranged to guide the airflow flowing upward from the side wall of the smoke guide channel to the center of the smoke guide channel;

[0036] A backflow wall facing away from the combustion port;

[0037] And a connecting wall extending vertically and connecting the diversion wall and the backflow wall;

[0038] The air outlet channel is arranged on the backflow wall.

[0039] In some solutions, a diversion part protruding into the smoke guide channel is provided on the side wall of the smoke guide channel;

[0040] The inside of the diversion part is provided as a cavity and is communicated with the heat-resistant cavity;

[0041] Moreover, the outer wall of the diversion part includes:

[0042] A diversion wall facing the combustion port, which is obliquely arranged to guide the airflow at the side wall of the smoke guide channel to the center of the smoke guide channel;

[0043] A backflow wall facing away from the combustion port;

[0044] And a connecting wall extending vertically and connecting the diversion wall and the backflow wall;

[0045] The air outlet channel is arranged on the connecting wall.

[0046] In some solutions, the burner has a flange portion located on the outer periphery of the combustion port, and the lower end of the side wall of the smoke guide channel abuts against the flange portion, so that the flange portion has: a shielding portion that shields the edge of the lower end opening of the smoke guide channel;

[0047] The shielding portion is provided with: an air supplement pore channel for external air to enter the smoke guide channel.

[0048] The gas water heater includes the combustion heat exchange component described in any of the above solutions.

[0049] The main beneficial effects of the above technical solutions are as follows:

[0050] 1. By providing a heat resistance structure in the side wall of the smoke guide channel in the smoke guide housing, which can use cold air as a heat insulation medium, the heat formed by the flame combustion in the smoke guide housing can be blocked from overflowing outward, effectively controlling the surface temperature of the combustion component.

[0051] 2. The overall heat resistance structure is simpler, which can better reduce the production cost.

[0052] 3. In addition to forming air-cooled heat insulation, the heat resistance air flow can also bring the dissipated heat back into the smoke guide channel to exchange heat with the heat exchanger, improving the overall effective heat output rate of the combustion component to form a high-efficiency gas combustion structure.

[0053] 4. By forming a heat resistance structure, when the combustion component is working, more and more stable oxygen in the external space can be input into the smoke guide channel, so as to better form a uniform oxygen and stable combustion chamber in the smoke guide housing.

[0054] 5. By correspondingly setting the fins to form a smoke resistance structure, the heat exchange efficiency can be better improved.

[0055] 6. Connect the air outlet channel to the lower end area of the heat resistance cavity, and achieve: the air flow can flow into the heat resistance cavity from the upper end area of the heat resistance cavity and flow out from the lower end area of the heat resistance cavity. So as to form a larger area of air flow in the heat resistance cavity, and then form a larger heat blocking area, improving the blocking effect of the overflowing heat.

[0056] 7. By setting the diversion portion, on the one hand, the air flow (air, gas, high-temperature flue gas, etc.) can be better gathered at the center of the smoke guide channel to improve the combustion efficiency and heat concentration rate, and then the heat can be better concentrated and output, facilitating better utilization of the heat in the follow-up; on the other hand, it can synchronously drive the air flow away from the side wall of the smoke guide channel to further weaken the effect of heat transfer outward.

[0057] 8. Further setting the air outlet channel on the connecting wall can better attract the airflow in the heat insulation cavity, further improve the smoothness of the heat insulation airflow circulation, thereby overall enhancing the blocking effect on the overflowing heat and better reducing the surface temperature of the smoke guide housing.

[0058] 9. By setting the air supplement channel, on the one hand, it can further increase the intake of air so that the gas can burn more fully. On the other hand, combined with the setting of the above-mentioned diversion part, with the rest of the settings being the same, increasing the air supplement channel can increase the overall intake of air, and then can better increase the gas flow rate in the smoke guide channel at the connecting wall, further facilitating the formation and smooth circulation of the heat insulation airflow, so as to better block the heat in the smoke guide channel from overflowing outward.

[0059] Further or more detailed beneficial effects will be described in combination with specific embodiments in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The following further describes the present invention with reference to the drawings:

[0061] Figure 1 It is a schematic diagram of the internal structure of a gas water heater.

[0062] Figure 2 It is a schematic diagram of the installation structure of the combustion assembly.

[0063] Figure 3 It is a schematic cross-sectional view of the combustion assembly.

[0064] Figure 4 It is a schematic diagram of the structure of the heat exchanger.

[0065] Figure 5 It is a schematic diagram of the fin structure.

[0066] Figure 6 It is a front view schematic diagram of the fin.

[0067] Figure 7 It is an enlarged schematic diagram of the air outlet channel and the air inlet channel.

[0068] Figure 8 It is a schematic diagram of the flow of the heat dissipation airflow.

[0069] Figure 9 It is a schematic diagram of an installation structure of the smoke guide housing.

[0070] Figure 10 It is a schematic diagram of the setting of the diversion part.

[0071] Figure 11 It is a schematic diagram of the setting of the air supplement channel.

[0072] Figure 12Schematic diagram of an installation structure of a smoke guide housing when a protrusion is formed in a heat insulation cavity. Detailed implementation manners

[0073] The present invention will be specifically illustrated with reference to the embodiments as follows:

[0074] Embodiment:

[0075] A gas water heater, as shown in the appendix Figure 1 mainly includes a water heater housing, a combustion heat exchange component and a fan component 4 disposed inside the water heater housing. The combustion heat exchange component includes: a combustion component for forming a high-temperature flame, and a heat exchanger 3 having a water pipe and for transferring the high temperature to the cold water in the water pipe. The fan component 4 is used to form a directional air flow in the combustion heat exchange component.

[0076] Specifically, for example, as shown in the appendix Figure 1 As an example, the combustion component includes a burner 1 and a smoke guide housing 2. The smoke guide housing 2 is detachably fixedly connected to the burner 1 (for example, detachably fixedly connected to the burner housing 1.1 in the following text) by a detachable connection method such as screws, which is convenient for maintaining, cleaning or replacing the smoke guide housing 2 in the later stage.

[0077] Among them, the burner 1 includes a burner housing 1.1, and the upper end of the burner housing 1.1 has a combustion port 1.11 for the flame to spray outwards. Specifically, as an example, as shown in the appendix Figure 3 an opening facing upwards is formed at the upper end of the burner housing 1.1, and this opening is the combustion port 1.11; moreover, a plurality of fire grates 1.2 are installed in the burner housing 1.1 in a cavity manner, and an air intake channel 1.12 for air to flow in is formed; an ignition device 1.3 for ignition is also provided in the combustion port 1.11 (this ignition device 1.3 is a conventional ignition device in gas water heaters and gas stoves, such as an electric spark ignition device, etc.).

[0078] A gas channel for gas to flow in is formed in the fire grate 1.2. The lower end of the gas channel is used to be connected to a gas delivery pipeline, and the upper end is communicated with the combustion port 1.11, so that the gas can be transported to the combustion port 1.11 through the fire grate 1.2.

[0079] The lower end of the air intake channel 1.12 is provided with an open end for air to flow in; the upper end is communicated with the combustion port 1.11, so that external air can be transported to the combustion port 1.11 through the air intake channel 1.12.

[0080] The smoke guide housing 2 is arranged above the burner 1, and the smoke guide housing 2 has a smoke guide channel 2.1 which is connected to the combustion port 1.11 and discharges the smoke generated by the combustion upward. The smoke guide channel 2.1 can be a hole arranged in the smoke guide housing 2 and is vertically through, and the lower end opening of the hole is connected to the combustion port 1.11.

[0081] At the same time, in order to better prevent the heat and smoke generated by combustion from overflowing, the lower opening of the smoke guide channel 2.1 is connected to the combustion port 1.11 (that is, the port of the combustion port 1.11 is in contact with or close enough to the port of the lower opening of the smoke guide channel 2.1), so that a combustion area for flame combustion is formed in the smoke guide channel 2.1. The channel diameter of the smoke guide channel 2.1 is often greater than or equal to the opening diameter of the combustion port 1.11.

[0082] During operation, the gas is transported from the gas channel inside the fire grate 1.2 to the combustion port 1.11, the air flows from the air intake channel 1.12 to the combustion port 1.11, and the ignition device 1.3 is controlled to open for ignition, so that the gas at the combustion port 1.11 of the burner 1 is ignited to form a combustion flame that surges upward, and the combustion flame surges into the smoke guide channel 2.1 to burn, so that a combustion area for flame combustion is formed in the smoke guide channel 2.1. At this time, the smoke and heat generated by the combustion enter the smoke guide channel 2.1 and flow upward under the guidance of the smoke guide channel 2.1.

[0083] The heat exchanger 3 is placed above the smoke guiding housing 2 and is used to exchange heat with the high-temperature smoke in the smoke guiding channel 2.1 to form hot water.

[0084] Specifically, Figure 4 As an example, the heat exchanger 3 includes a heat exchange housing 3.1, which can be detachably connected to the smoke guide housing 2 or to other external support structures, such as the water heater housing, by means of screws. The heat exchange housing 3.1 has heat exchange channels 3.11 (see FIG. 1 ) with two ends connected. Figure 3 As shown in the figure, the heat exchange channel 3.11 is a through hole arranged in the vertical direction); the lower end of the heat exchange channel 3.11 is connected with and communicated with the upper end opening of the smoke guide channel 2.1, so that the high-temperature flue gas generated by the combustion in the smoke guide channel 2.1 can flow upward into the heat exchange channel 3.11.

[0085] Meanwhile, the heat exchanger 3 further includes a heat exchange pipe 3.2. One end of the heat exchange pipe 3.2 has a water inlet for water intake, and the other end has a water outlet for water discharge. The heat exchange pipe 3.2 is connected to the heat exchange housing 3.1 and has a heat exchange portion disposed in the heat exchange channel 3.11. Realization: When combustion is carried out as described above to form a flame and high-temperature flue gas, the high-temperature flue gas flows into the heat exchange channel 3.11 to transfer heat to the heat exchange portion of the heat exchange pipe 3.2 disposed in the heat exchange channel 3.11. At the same time, cold water is conveyed through the water inlet of the heat exchange pipe 3.2, for example, through a water pipe. The cold water is heated after flowing through the portion of the heat exchange pipe 3.2 disposed in the heat exchange channel 3.11, and then hot water is output from the water outlet for use.

[0086] A number of heat exchange fins 3.3 (the heat exchange fins 3.3 are sheet structures made of materials with good thermal conductivity such as steel strips, stainless steel strips, copper strips, and aluminum strips) can also be provided in the heat exchange channel 3.11. The heat exchange fins 3.3 have portions that are in contact with the heat exchange pipe 3.2, so as to increase the heat exchange contact area with the high-temperature flue gas and transfer the heat in the high-temperature flue gas to the heat exchange pipe 3.2 better and over a larger area, thereby further improving the heat exchange effect on the cold water in the heat exchange pipe 3.2.

[0087] To improve the heat exchange effect, especially when, as described below, the high-temperature gas flow is concentrated in the central portion of the heat exchange channel 3.11 and flows upward by setting the flow guiding portion 2.6, it is adapted to perform heat exchange on a higher-speed gas flow to improve the heat exchange effect and efficiency; as shown in the appendix Figure 5 As shown, the heat exchange fins 3.3 in this embodiment include a fin body 3.31, which is provided with insertion holes 3.32 for inserting the heat exchange pipe 3.2. There are at least two insertion holes 3.32 and they are arranged at intervals in the horizontal direction. When the heat exchange fins 3.3 are installed in the heat exchange channel 3.11, the heat exchange pipe 3.2 extends in a curved manner and sequentially passes through a number of insertion holes 3.32. The inserted portion of the heat exchange pipe 3.2 is in contact with the heat exchange fins 3.3, so that the heat obtained by the heat exchange fins 3.3 from heat transfer with the high-temperature flue gas can be transferred to the heat exchange pipe 3.2 to heat the heat exchange pipe 3.2.

[0088] As shown in the appendix Figure 5 As shown in the figure, one side surface of the fin body 3.31 has a raised smoke-blocking structure, which is disposed in the middle area between two insertion holes 3.32 and drives the smoke flowing from bottom to top to flow towards the insertion holes 3.32 on both sides of it. Realization: By setting the smoke-blocking structure, not only the contact area of the heat exchange fins 3.3 for contacting with the hot gas flow is increased, the flow rate of the gas flow is slowed down to extend the contact time between the gas flow and the heat exchange fins 3.3, thereby improving the heat exchange effect; but also the gas flow can be driven to flow towards the insertion holes 3.32 where the heat exchange pipe 3.2 is inserted, so that the hot gas flow can heat the heat exchange pipe 3.2 better and faster.

[0089] Furthermore, in this embodiment, the smoke-blocking structure includes: a first smoke-blocking portion 3.34, a second smoke-blocking portion 3.35, and a third smoke-blocking portion 3.36 that are arranged at intervals from bottom to top. Moreover, in the direction from bottom to top, the width dimensions of the first smoke-blocking portion 3.34, the second smoke-blocking portion 3.35, and the third smoke-blocking portion 3.36 (such as the interval dimensions at both ends of the smoke-blocking portion in the left-right direction in the appendix) gradually increase. That is, as shown in the appendix, the width dimension d1 of the first smoke-blocking portion 3.34 is smaller than the width dimension d2 of the second smoke-blocking portion 3.35, and the width dimension d2 of the second smoke-blocking portion 3.35 is smaller than the width dimension d3 of the third smoke-blocking portion 3.36. Figure 5 In the appendix Figure 6 shown, the width dimension d1 of the first smoke-blocking portion 3.34 is smaller than the width dimension d2 of the second smoke-blocking portion 3.35, and the width dimension d2 of the second smoke-blocking portion 3.35 is smaller than the width dimension d3 of the third smoke-blocking portion 3.36.

[0090] At this time, the first smoke-blocking portion 3.34, the second smoke-blocking portion 3.35, and the third smoke-blocking portion 3.36 jointly form an inverted triangle-shaped flow guiding structure. After the flue gas flowing from bottom to top impacts the smoke-blocking structure, not only will the flow rate be slowed down, but the airflow will also be divided into one airflow near the left insertion hole 3.32 and another airflow near the right insertion hole 3.32. It is achieved that when the heat exchange pipes 3.2 are inserted into the insertion holes 3.32 of the heat exchange fins 3.3, the high-temperature flue gas can be better driven to flow towards the heat exchange pipes 3.2 to improve the heat exchange effect.

[0091] Moreover, the smoke-blocking structure in this embodiment is composed of three smoke-blocking portions spaced vertically. There is sufficient space between the smoke-blocking portions for the airflow to flow, avoiding excessive blockage of the airflow, and optimizing the smoothness of the airflow while improving the heat exchange effect.

[0092] Vertically (in the up-down direction in the appendix Figure 5 ), the first smoke-blocking portion 3.34 can be configured to be lower than the centers of the two insertion holes 3.32 (the center of the insertion hole, which is the center position when the insertion hole is circular). That is, as shown in the appendix Figure 6 described, the first smoke-blocking portion 3.34 is lower than the center of its left insertion hole 3.32 and also lower than the center of its right insertion hole 3.32. It is achieved that the first smoke-blocking portion 3.34 can better drive the airflow flowing from bottom to top to flow towards the two side insertion holes 3.32; and the airflow can have more space to flow smoothly upward.

[0093] Furthermore, vertically (in the appendix Figure 5In the up - down direction, the third smoke - blocking part 3.36 is configured to be higher than the two insertion holes 3.32; that is, the third smoke - blocking part 3.36 is higher than the insertion hole 3.32 on its left and also higher than the insertion hole 3.32 on its right. So that the third smoke - blocking part 3.36 can form a greater flow - blocking effect at a higher position, better suspend the air flow in the area where the insertion hole 3.32 is located on the heat - exchange fins 3.3, extend the time for the air flow to be in thermal contact with the heat - exchange fins 3.3, and improve the heat - exchange effect. And the lower end surface of the third smoke - blocking part 3.36 is an arc - shaped surface that bulges downward in the middle; to optimize the smoothness of air - flow circulation and reduce the possibility of eddy currents.

[0094] Furthermore, as shown in the appendix Figure 5 The second smoke - blocking part 3.35 includes a first guide plate 3.351 that extends obliquely (for example, in the appendix Figure 5 it extends obliquely with the left side higher than the right side), and it is configured to guide the flue gas flowing from bottom to top to the upper end of one insertion hole 3.32.

[0095] The second smoke - blocking part 3.35 further includes a second guide plate 3.352 that extends obliquely (for example, in the appendix Figure 5 it extends obliquely with the right side higher than the left side), and it is configured to guide the flue gas flowing from bottom to top to the upper end of the other insertion hole 3.32. And the lower end of the first guide plate 3.351 is close to or in contact with the lower end of the second guide plate 3.352.

[0096] In this way, the air flow can be better guided to the upper end of the insertion hole 3.32 where it is not easy to come into contact with the hot air flow; especially when a heat - exchange pipe 3.2 is inserted into the insertion hole 3.32, the above - mentioned setting of the second smoke - blocking part 3.35 can better guide the flue gas to the shaded side of the heat - exchange pipe 3.2 (that is, the upper end surface of the heat - exchange pipe 3.2 facing away from the air flow), so as to improve the heat - exchange effect.

[0097] Similarly, as shown in the appendix Figure 5 On one side surface of the fin body 3.31, a plurality of flow - blocking columns 3.33 can also be convexly provided, which are arranged around the upper half - circumference of the insertion hole 3.32. In this embodiment, the flow - blocking columns 3.33 and the smoke - blocking structure are arranged on the same side surface of the fin body 3.31.

[0098] To increase the contact area with the heat - exchange pipe 3.2, the hole wall of the insertion hole 3.32 can also extend with an extension wall 3.321 that bulges on one side surface of the fin body 3.31.

[0099] At this time, the extension wall 3.321 and the smoke blocking structure are preferably arranged on the same side of the fin body 3.31, and the protrusion height of the extension wall 3.321 is greater than that of the smoke blocking structure; moreover, on the outer edge of the protruding end of the extension wall 3.321, there are provided a number of support ends 3.322 extending in the peripheral direction of the insertion hole 3.32. In this way, when multiple heat exchange fins 3.3 are stacked, the support ends 3.322, as a support structure, will protect the smoke blocking structure, ensuring that the smoke blocking structure can stably and smoothly change the airflow as described above according to requirements.

[0100] The above-mentioned first smoke blocking part 3.34, second smoke blocking part 3.35, third smoke blocking part 3.36 and the flow blocking column 3.33 are all preferably formed by flanging or pressurizing the fin body 3.31, so as to form the above structure while avoiding excessive increase in the overall weight of the heat exchange fin 3.3.

[0101] On the above basis, as shown in the appendix Figure 5 The fin body 3.31 can also be provided with an overflow hole 3.38 at the upper end of the insertion hole 3.32 to improve the smoothness of the overall airflow. Moreover, a flow blocking part 3.37 protruding on one side of the fin body 3.31 can also be provided at the upper end of the overflow hole 3.38 to block the airflow flowing upward from the overflow hole 3.38, better avoiding excessive overflow of the airflow from the overflow hole 3.38, so as to overall extend the time of heat contact between the airflow and the heat exchange fin 3.3 and improve the heat exchange effect. The flow blocking part 3.37 is preferably formed by flanging the edge of the fin body 3.31.

[0102] The fan assembly 4 is a fan structure used in a gas water heater to form an airflow, and it is configured to: form an airflow that drives the flue gas to flow from the flue gas passage 2.1 into the heat exchange passage 3.11.

[0103] The fan assembly 4 can be connected to the heat exchange housing 3.1, placed at the upper end opening of the heat exchange passage 3.11, and is configured to: suck the flue gas in the flue gas passage 2.1. To drive the flue gas to flow from the flue gas passage 2.1 into the heat exchange passage 3.11. At this time, the fan assembly 4 is also provided with an exhaust pipe for discharging the sucked flue gas in a directional manner, and this exhaust pipe is used to communicate with the exhaust port in the building to discharge the flue gas in a directional manner.

[0104] The fan assembly 4 can also be connected to the burner 1, placed at the lower end opening of the air intake passage 1.12, and is configured to: blow the flue gas in the flue gas passage 2.1 upward. To drive the flue gas to flow from the flue gas passage 2.1 into the heat exchange passage 3.11. At this time, the upper end opening of the heat exchange passage 3.11 is used to communicate with the exhaust port in the building.

[0105] In summary, the combustion heat exchange assembly (including the combustion assembly and the heat exchanger 3) and the blower assembly 4 together constitute the main components of the gas water heater. In addition, the gas water heater also includes several electrical components disposed outside the combustion heat exchange assembly. When the combustion heat exchange assembly operates as described above, there will be a problem that the high-temperature heat inside the smoke guide housing 2 is likely to overflow, which will not only cause the surface temperature of the smoke guide housing 2 to be too high, affecting the service life of the smoke guide housing 2, but also have an adverse impact on the electrical components outside the combustion heat exchange assembly, and in severe cases, will greatly reduce the service life of the gas water heater.

[0106] Based on this, a combustion heat exchange assembly that can block the heat overflow in the smoke guide housing 2 and better reduce the surface temperature of the smoke guide housing 2 is needed. And a gas water heater equipped with this combustion heat exchange assembly is proposed.

[0107] As a form, a water cooling structure can be provided on the outer surface of the smoke guide housing 2 to solve the above problems. However, setting up a water cooling structure often requires a complex pipeline structure, resulting in problems such as a complex pipeline structure and difficult installation of the combustion assembly; moreover, in order to better prevent water leakage and water body corrosion, the water cooling pipeline structure often requires a large cost.

[0108] In order to solve the above problems while being able to better simplify the structure and reduce the cost, the present application proposes: a combustion heat exchange assembly that combines the combustion characteristics of gas to block the heat from dissipating outward through a simple structure and has higher economy. And a gas water heater equipped with this combustion heat exchange assembly is proposed.

[0109] As an example, as shown in the attached Figure 3 and the attached Figure 7 figures, the combustion heat exchange assembly in this embodiment further includes a heat blocking structure formed in the side wall of the smoke guide channel 2.1.

[0110] Specifically, the heat blocking structure includes a heat blocking cavity 2.2, an air outlet channel 2.4, and an air inlet channel 2.3. More precisely, for example, as shown in the attached Figure 3 and the attached Figure 7 figures, the heat blocking cavity 2.2 is a cavity provided in the side wall of the smoke guide channel 2.1; the air outlet channel 2.4 is a hole provided in the side wall of the heat blocking cavity 2.2 that is horizontally close to the smoke guide channel 2.1 and allows the heat blocking cavity 2.2 to communicate with the smoke guide channel 2.1; the air inlet channel 2.3 is a hole provided in the side wall of the heat blocking cavity 2.2 that is horizontally far from the smoke guide channel 2.1 and allows the heat blocking cavity 2.2 to communicate with the outside air, and the air inlet channel 2.3 communicates with the upper end region of the heat blocking cavity 2.2. (In the vertical direction, by dividing the heat blocking cavity 2.2 into three equal parts, the heat blocking cavity 2.2 is sequentially divided into an upper end region, a middle region, and a lower end region from top to bottom.)

[0111] At this time, when a flame is formed in the combustion zone of the smoke guiding channel 2.1, oxygen and fuel gas are consumed, and high-temperature smoke rising directly is formed, so as to form a low-pressure zone in the smoke guiding channel 2.1. At this time, external air will enter the heat insulation cavity 2.2 from the air inlet channel 2.3, flow through the heat insulation cavity 2.2 and then flow out to the smoke guiding channel 2.1 from the air outlet channel 2.4, and then a flowing air current (as shown by the arrows in the attachment) can be formed in the heat insulation cavity 2.2, which is called the heat insulation air current. This heat insulation air current forms air cooling and heat insulation, and can bring the heat dissipated from the surface of the smoke guiding shell 2 outward by the smoke guiding channel 2.1 back into the smoke guiding channel 2.1. It can not only block the heat formed by the flame combustion in the smoke guiding shell 2 from overflowing outward, effectively control the surface temperature of the combustion component, but also bring the dissipated heat back into the smoke guiding channel 2.1 to exchange heat with the heat exchanger 3, improving the overall effective heat output rate of the combustion component. At the same time, the above heat insulation structure does not need to additionally set up a complex water pipe structure, has a simpler and easier-to-install structure, and does not need to spend a large cost to deal with the control of the water cooling circuit and the erosion problem of the water circuit, thus better avoiding the problems existing in water cooling. Figure 8 As shown by the arrows in the attachment, it is called the heat insulation air current. This heat insulation air current forms air cooling and heat insulation, and can bring the heat dissipated from the surface of the smoke guiding shell 2 outward by the smoke guiding channel 2.1 back into the smoke guiding channel 2.1. It can not only block the heat formed by the flame combustion in the smoke guiding shell 2 from overflowing outward, effectively control the surface temperature of the combustion component, but also bring the dissipated heat back into the smoke guiding channel 2.1 to exchange heat with the heat exchanger 3, improving the overall effective heat output rate of the combustion component. At the same time, the above heat insulation structure does not need to additionally set up a complex water pipe structure, has a simpler and easier-to-install structure, and does not need to spend a large cost to deal with the control of the water cooling circuit and the erosion problem of the water circuit, thus better avoiding the problems existing in water cooling.

[0112] Among them, the specific position of the air outlet channel 2.4 can be set according to requirements. In this embodiment, as shown in the attachment Figure 3 and the attachment Figure 7 shown, the air outlet channel 2.4 is preferably communicated with the lower end area of the heat insulation cavity 2.2, so as to realize that the air current can flow into the heat insulation cavity 2.2 from the upper end area of the heat insulation cavity 2.2 and flow out from the lower end area of the heat insulation cavity 2.2. In this way, a larger area of air current can be formed in the heat insulation cavity 2.2, and then a larger heat blocking area can be formed, improving the blocking effect of the overflowing heat.

[0113] Furthermore, as shown in the attachment Figure 3 and the attachment Figure 7 shown, the end of the air outlet channel 2.4 far from the heat insulation cavity 2.2 can also be arranged in alignment with the combustion zone, so that the air current output from the air outlet channel 2.4 can be conveyed to the combustion zone of the smoke guiding channel 2.1. In this way, the air with a certain amount of heat in the heat insulation cavity 2.2 can better participate in the combustion of the combustion component, improving the overall combustion efficiency and combustion effect of the combustion component.

[0114] In the above solution, as shown in the attachment Figure 3 shown, the air inlet channel 2.3 can be arranged on the side wall of the heat insulation cavity 2.2 facing away from the smoke guiding channel 2.1 (that is, the side wall of the heat insulation cavity 2.2 that is horizontally far from the smoke guiding channel 2.1), so as to have a more open space for external air to flow into the air inlet channel 2.3, improving the smoothness of the air current flow and thus improving the heat blocking effect. At this time, as shown in the attachment Figure 7As shown in the figure, on the side wall of the heat insulation cavity 2.2 facing away from the smoke guiding channel 2.1, there may also be provided a drainage part 2.5 protruding into the heat insulation cavity 2.2. The drainage part 2.5 is inclined so as to guide the air flow entering the heat insulation cavity 2.2 from the air inlet channel 2.3 to flow upward and then downward, so as to further increase the flow area of the air flow in the heat insulation cavity 2.2 and increase the heat blocking area.

[0115] In some solutions, for the side wall of the heat insulation cavity 2.2 located between the smoke guiding channel 2.1 and the heat insulation cavity 2.2, there may be provided a plurality of heat guiding parts 2.24 protruding into the heat insulation cavity 2.2. So as to increase the contact area between the air flow and the side wall of the smoke guiding channel 2.1, and then improve the heat exchange efficiency between the air flow and the side wall of the smoke guiding channel 2.1, so that the air flow flowing through the heat insulation cavity 2.2 can bring more heat back into the smoke guiding channel 2.1.

[0116] In order to improve the overall heat blocking effect, a plurality of heat insulation structures as described above may also be provided around the smoke guiding channel 2.1, and the heat insulation cavities 2.2 in each heat insulation structure are interconnected to form an annular cavity surrounding the outer periphery of the smoke guiding channel 2.1, so as to block the heat in the smoke guiding shell 2 from overflowing outward in all directions.

[0117] At this time, as shown in the attached Figure 9 figure, the smoke guiding shell 2 mainly includes an inner layer shell 2a with a smoke guiding channel 2.1 inside, and an outer layer shell arranged around the inner layer shell 2a. A heat insulation cavity 2.2 is formed at intervals between the inner layer shell 2a and the outer layer shell. The outer layer shell includes a first outer layer plate 2b.1 and a second outer layer plate 2b.2. The first outer layer plate 2b.1 and the second outer layer plate 2b.2 are detachably connected by, for example, screws to form the outer layer shell. And, both the first outer layer plate 2b.1 and the second outer layer plate 2b.2 are preferably detachably fixedly connected to the inner layer shell 2a by, for example, screws. The air outlet channel 2.4 is arranged on the inner layer shell 2a, and the air inlet channel 2.3 is arranged on the outer layer shell.

[0118] In any of the above solutions, as shown in the attached Figure 10 figure, a diversion part 2.6 protruding into the smoke guiding channel 2.1 may also be provided on the side wall of the smoke guiding channel 2.1.

[0119] Specifically, the inside of the flow guiding part 2.6 is provided with a cavity and is communicated with the heat blocking cavity 2.2; moreover, the outer wall of the flow guiding part 2.6 (i.e., the side wall of the convex outer surface of the flow guiding part 2.6 that is used to contact the airflow in the smoke guiding channel 2.1) includes: a drainage wall 2.61 facing the combustion port 1.11 (i.e., facing the airflow after the airflow is output from the combustion port 1.11), a backflow wall 2.63 facing away from the combustion port 1.11 (i.e., facing away from the airflow after the airflow is output from the combustion port 1.11), and a connecting wall 2.62 that extends vertically (vertically or arcuately) and connects the drainage wall 2.61 and the backflow wall 2.63. For example, as shown in the appendix Figure 10 As shown, the outer wall of the flow guiding part 2.6 includes: a drainage wall 2.61 facing downward, a backflow wall 2.63 facing upward, and a connecting wall 2.62 that extends arcuately vertically.

[0120] Among them, the drainage wall 2.61 is inclined so as to guide the airflow flowing upward from the side wall of the smoke guiding channel 2.1 to the center of the smoke guiding channel 2.1 (the area where the axis of the smoke guiding channel 2.1 is located). In this way, on the one hand, the airflow (air, gas, high-temperature flue gas, etc.) can be better aggregated at the center of the smoke guiding channel 2.1 to improve the combustion efficiency and heat concentration rate, and then the heat can be better concentrated and output, which is convenient for better utilization of heat in the follow-up; on the other hand, the airflow can be synchronously driven away from the side wall of the smoke guiding channel 2.1 to further weaken the effect of heat transfer to the outside.

[0121] At this time, as a way, the air outlet channel 2.4 can be arranged on the backflow wall 2.63.

[0122] Or, as another way, the air outlet channel 2.4 is arranged on the connecting wall 2.62; and the air outlet channel 2.4 is preferably arranged to extend obliquely so that the airflow in the heat blocking cavity 2.2 can be conveyed obliquely upward after flowing out of the air outlet channel 2.4.

[0123] Regardless of the above method, the airflow formed by combustion in the smoke guiding channel 2.1 is not likely to have an unwanted obstructive effect on the airflow in the heat blocking cavity 2.2, so that a heat blocking airflow for heat blocking as described above can always be smoothly formed in the heat blocking cavity 2.2.

[0124] Moreover, when the air outlet channel 2.4 is provided on the connecting wall 2.62, due to the guiding effect of the diversion wall 2.61 on the air flow, the diameter of the smoke guiding channel 2.1 at the connecting wall 2.62 will be driven to shrink, resulting in an increase in flow velocity and a decrease in fluid pressure in this area; thus, it can better attract the air flow in the heat-resistant cavity 2.2, further improving the smoothness of the flow of the heat-resistant air flow (the air flow in which external air enters the heat-resistant cavity 2.2 from the air inlet channel 2.3 and then flows out from the air outlet channel 2.4 to the smoke guiding channel 2.1), so as to overall improve the blocking effect on the overflowing heat and better reduce the surface temperature of the smoke guiding housing 2.

[0125] Furthermore, as shown in the attached Figure 11 figure, the burner 1 may further have a flange portion 1.13 located on the outer periphery of the combustion port 1.11, and this flange portion 1.13 may be formed by the outward extension of the burner housing 1.1. The channel diameter of the smoke guiding channel 2.1 is configured to be larger than the diameter of the combustion port 1.11, and the smoke guiding housing 2 is placed on the flange portion 1.13 of the burner housing 1.1, and the lower end of the side wall of the smoke guiding channel 2.1 is abutted against the flange portion 1.13, so that the flange portion 1.13 has: a shielding portion that shields the edge of the lower end opening of the smoke guiding channel 2.1. The shielding portion is provided with: an air supplement channel 1.14 for external air to enter the smoke guiding channel 2.1.

[0126] In this way, by setting the air supplement channel 1.14, on the one hand, it can further increase the intake of air, enabling the gas to burn more fully; on the other hand, combined with the above-mentioned setting of the diversion portion 2.6, with the same other settings, increasing the air supplement channel 1.14 can increase the overall intake of air, and then can better increase the gas flow velocity in the smoke guiding channel 2.1 at the connecting wall 2.62, further assisting in the formation and smooth flow of the heat-resistant air flow, so as to better block the heat in the smoke guiding channel 2.1 from overflowing outward.

[0127] In some solutions, the air supplement channel 1.14 may be vertically extended, so that: the external air flow enters the smoke guiding channel 2.1 upward through the air supplement channel 1.14. And, the upper end opening of the air supplement channel 1.14 is close to the side wall of the smoke guiding channel 2.1 and is preferably placed below the diversion wall 2.61. In this way, the air flow can not only supplement the air as described above and increase the air flow velocity; but also, in some cases, it can form an air curtain that flows upward along the surface of the smoke guiding channel 2.1 to block the heat in the smoke guiding channel 2.1 from overflowing outward, further improving the heat blocking effect.

[0128] Based on any of the above solutions, especially in the solution with the diversion portion 2.6 provided, as shown in the attached Figure 12As shown, on at least one side wall of the heat insulation cavity 2.2, there may also be provided: a convex portion that is opposite to the central region of the smoke guide channel 2.1 (the region where the axis of the smoke guide channel 2.1 is located, which is often also the region where high-temperature flue gas accumulates) in the transverse direction (horizontal direction) and protrudes into the heat insulation cavity 2.2. The setting of this convex portion makes the diameter (the diameter or size of the cavity opening) of the heat insulation cavity 2.2 arranged in a large, small, large pattern (i.e., a pattern of decreasing first and then increasing) in the vertical direction; and, a partial region where the diameter of the heat insulation cavity 2.2 decreases is opposite to the central region of the smoke guide channel 2.1 in the transverse direction.

[0129] For example, as shown in the appendix Figure 12 As shown, on one side wall of the heat insulation cavity 2.2 that is close to the smoke guide channel 2.1 in the transverse direction, there is provided: a first convex portion 2.21 that is opposite to the central region of the smoke guide channel 2.1 in the transverse direction and protrudes into the heat insulation cavity 2.2; or, on one side wall of the heat insulation cavity 2.2 that is far from the smoke guide channel 2.1 in the transverse direction, there is provided: a second convex portion 2.22 that is opposite to the central region of the smoke guide channel 2.1 in the transverse direction and protrudes into the heat insulation cavity 2.2.

[0130] By setting the convex portion, when the airflow in the heat insulation cavity 2.2 flows through the narrow opening region that is opposite to the central region of the smoke guide channel 2.1 in the transverse direction, the flow rate can be increased to a certain extent. It can be achieved that: not only can the contact area between the airflow and the smoke guide housing 2 be increased, and the heat transferred to the side wall of the smoke guide channel 2.1 can be better brought back into the smoke guide channel 2.1, optimizing the heat insulation effect; but also, according to the working characteristics of the combustion components in the gas water heater, in the case of a certain airflow volume, the region where heat is more likely to overflow can pass through a faster airflow to bring the heat back into the smoke guide channel 2.1 more quickly; while the region where the heat overflows more slowly passes through a slower and larger airflow volume to stably, slowly and fully transfer heat to the side wall of the smoke guide channel 2.1 and bring the heat back into the smoke guide channel 2.1, thereby improving the overall heat insulation effect.

[0131] In some solutions, in the direction from top to bottom, the cross-sectional area of the convex portion can gradually increase to better drive the airflow to flow smoothly from top to bottom in the heat insulation cavity 2.2.

[0132] Furthermore, on the side wall of the heat insulation cavity 2.2 that is opposite to the smoke guide channel 2.1 (i.e., the side wall of the heat insulation cavity 2.2 that is far from the smoke guide channel 2.1 in the transverse direction), there is a part that is transversely aligned with the convex portion, and this part may also be provided with a make-up flow channel 2.23 for external air to flow into the heat insulation cavity 2.2. When the heat insulation airflow is formed as described above, the external airflow can flow into the heat insulation cavity 2.2 more quickly through the make-up flow channel 2.23, increasing the flow rate of the overall heat insulation airflow, further optimizing and improving the blocking effect on the overflowing heat, and better reducing the surface temperature of the smoke guide housing 2.

[0133] The above are only the preferred embodiments of the present invention and do not limit the scope of the present invention. Additionally, in the embodiments of the present invention, the terms "vertical", "horizontal", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is usually placed during use. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. It should be further noted that unless otherwise clearly specified and defined, terms such as "installation", "connection", "attachment", "fixation", etc. in the description should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0134] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. Combustion heat exchange component, characterized in that, Comprising: A burner (1) for forming a flame, the burner (1) having a combustion port (1.11) for the flame to spray outwards; A heat exchanger (3) placed above the burner (1), which includes a heat exchange housing (3.1), heat exchange pipes (3.2) and heat exchange fins (3.3). There is a heat exchange channel (3.11) in the heat exchange housing (3.1). The heat exchange pipes (3.2) have heat exchange parts placed in the heat exchange channel (3.11), and the heat exchange fins (3.3) are placed in the heat exchange channel (3.11) and are in contact with the heat exchange parts; A smoke guide housing (2) detachably fixed to the burner (1), which has inside: a smoke guide channel (2.1) connected to the combustion port (1.11) and discharging the smoke generated by combustion upwards to the heat exchange channel (3.11), and the lower end opening of the smoke guide channel (2.1) is connected to the combustion port (1.11) so that a combustion area for the flame to burn is formed in the smoke guide channel (2.1); A heat insulation structure is formed in the side wall of the smoke guide channel (2.1), and the heat insulation structure includes: A heat insulation cavity (2.2) provided in the side wall of the smoke guide channel (2.1); An air outlet channel (2.4) for connecting the heat insulation cavity (2.2) to the smoke guide channel (2.1); An air inlet channel (2.3) connected to the upper end area of the heat insulation cavity (2.2) and for connecting the heat insulation cavity (2.2) to the external air.

2. The combustion heat exchange component according to claim 1, characterized in that: The air outlet channel (2.4) is connected to the lower end area of the heat insulation cavity (2.2).

3. The combustion heat exchange component according to claim 2, characterized in that: One end of the air outlet channel (2.4) away from the heat insulation cavity (2.2) is arranged opposite to the combustion area so that the air flow output from the air outlet channel (2.4) can be transported to the combustion area of the smoke guide channel (2.1).

4. The combustion heat exchange component according to claim 1, characterized in that: The heat exchange fins (3.3) include a fin body (3.31), and the fin body (3.31) has at least two insertion holes (3.32), and the two insertion holes (3.32) are arranged at intervals in the horizontal direction; The heat exchange pipes (3.2) extend in a curved manner and sequentially pass through the two insertion holes (3.32); One side surface of the fin body (3.31) has a raised smoke blocking structure, and the smoke blocking structure is placed in the middle area between the two insertion holes (3.32) and drives the smoke flowing from bottom to top to flow towards the two insertion holes (3.32) on its two sides.

5. The combustion heat exchange component according to claim 4, characterized in that: The smoke blocking structure includes: a first smoke blocking part (3.34), a second smoke blocking part (3.35) and a third smoke blocking part (3.36) arranged at intervals from bottom to top; In the direction from bottom to top, the width dimensions of the first smoke blocking part (3.34), the second smoke blocking part (3.35) and the third smoke blocking part (3.36) gradually increase.

6. The combustion heat exchange component according to claim 5, wherein: Vertically, the first smoke blocking part (3.34) is configured to be lower than the centers of the two insertion holes (3.32).

7. The combustion heat exchange component according to claim 5, characterized in that: Vertically, the third smoke blocking part (3.36) is configured to be higher than the two insertion holes (3.32); And the lower end surface of the third smoke-blocking part (3.36) is: an arc-shaped surface protruding downward.

8. The combustion heat exchange component according to claim 5, characterized in that: The second smoke-blocking part (3.35) includes: A first guide plate (3.351) extending obliquely, which is configured to: guide the flue gas flowing from bottom to top to the upper end of one of the insertion holes (3.32); A second guide plate (3.352) extending obliquely, which is configured to: guide the flue gas flowing from bottom to top to the upper end of the other insertion hole (3.32); And the lower end of the first guide plate (3.351) is close to or in contact with the lower end of the second guide plate (3.352).

9. The combustion heat exchange component according to any one of claims 1 to 8, characterized in that: On the side wall of the smoke guide channel (2.1), there is provided a diversion part (2.6) protruding into the smoke guide channel (2.1); The inside of the diversion part (2.6) is provided with a cavity and is communicated with the heat-resistant cavity (2.2); And, the outer wall of the diversion part (2.6) includes: A diversion wall (2.61) facing the combustion port (1.11), which is inclined to guide the air flow flowing upward from the side wall of the smoke guide channel (2.1) to the center of the smoke guide channel (2.1); A backflow wall (2.63) facing away from the combustion port (1.11); And a connecting wall (2.62) extending vertically and connecting the diversion wall (2.61) and the backflow wall (2.63); The air outlet channel (2.4) is arranged on the backflow wall (2.63).

10. The combustion heat exchange component according to any one of claims 1 to 8, characterized in that: On the side wall of the smoke guide channel (2.1), there is provided a diversion part (2.6) protruding into the smoke guide channel (2.1); The inside of the diversion part (2.6) is provided with a cavity and is communicated with the heat-resistant cavity (2.2); And, the outer wall of the diversion part (2.6) includes: A diversion wall (2.61) facing the combustion port (1.11), which is inclined to guide the air flow at the side wall of the smoke guide channel (2.1) to the center of the smoke guide channel (2.1); A backflow wall (2.63) facing away from the combustion port (1.11); And a connecting wall (2.62) extending vertically and connecting the diversion wall (2.61) and the backflow wall (2.63); The air outlet channel (2.4) is arranged on the connecting wall (2.62).

11. The combustion heat exchange component according to claim 10, wherein: The burner (1) has a flange part (1.13) located on the outer periphery of the combustion port (1.11), and the lower end of the side wall of the smoke guide channel (2.1) abuts against the flange part (1.13), so that the flange part (1.13) has: a shielding part for shielding the edge of the lower end opening of the smoke guide channel (2.1); The shielding part is provided with a supplementary air hole channel (1.14) for external air to enter the smoke guide channel (2.1).

12. Gas water heater, characterized in that: Including the combustion heat exchange component according to any one of claims 1 to 11.

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