Combustion component and gas water heater having the same

Abstract

The present invention relates to the technical field of household electrical appliances, and more specifically to a combustion component and a gas water heater having the same. The combustion component includes: a burner for forming a flame, the burner having a combustion port for the flame to spray outwards; a smoke guide housing, which has therein: a smoke guide passage connected to the combustion port and discharging the smoke generated by combustion upwards; a heat insulation structure formed in the side wall of the smoke guide passage, the heat insulation structure including: a near heat flow cavity and a far heat flow cavity provided in the side wall of the smoke guide passage, the near heat flow cavity being disposed between the far heat flow cavity and the smoke guide passage; a flow passage for connecting the near heat flow cavity and the far heat flow cavity; an air outlet passage for connecting the near heat flow cavity and the smoke guide passage; a first air inlet passage for connecting the far heat flow cavity and the external space of the smoke guide housing. Thus, a combustion component that blocks heat from dissipating outwards with a simple structure and has higher economy is formed; and a gas water heater having the combustion component is formed.

Description

Technical Field

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

[0002] Gas water heating equipment is a civilian heating device that utilizes the heat released by gas combustion and transfers the heat to flowing water through a heat exchange device for instant heating. Its basic structure mainly consists of four functional units: a combustion component (for generating high-temperature flames by gas combustion), a heat exchanger (transferring heat energy from flue gas to water through metal pipelines), a fan system (including aerodynamic devices such as turbo fans), and supporting fluid pipelines and an electronic control unit.

[0003] In the current technical system, to solve the thermal influence of the high-temperature working condition of the combustion component on adjacent electronic devices, mainly two types of heat dissipation technical solutions are adopted: the first is to integrate a circulating water cooling heat dissipation structure outside the combustion chamber housing, and the second is to install a forced air cooling device outside the equipment. However, actual engineering applications show that:

[0004] For the circulating water cooling solution, its cooling pipes need to be arranged in a multi-dimensional space with the combustion chamber, resulting in a complex system structure design and a cumbersome installation and commissioning process; to ensure the sealing of the cooling medium and resist pipeline oxidation and corrosion, high-grade anti-corrosion materials must be selected and special surface treatment processes must be implemented, directly increasing the product material cost; during the long-term operation of the equipment, scale formation may occur in the cooling channels, causing a decrease in heat conduction efficiency and an increase in maintenance costs.

[0005] Regarding the forced air cooling system, since a dedicated fan component needs to be added, it not only generates additional equipment procurement costs but also requires planning an independent air guiding channel and a supporting electronic control circuit, resulting in a significant increase in the complexity of the overall internal layout of the machine.

[0006] Therefore, the above two types of conventional heat dissipation technologies have significant technical defects in terms of system structure complexity, manufacturing cost control, and economic indicators. 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 component that combines the characteristics of gas combustion, 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 component.

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

[0010] A combustion component, comprising:

[0011] A burner for forming a flame, the burner having a combustion port through which the flame jets outwards;

[0012] A smoke guide housing detachably fixed to the burner, which has: a smoke guide channel connected to the combustion port and discharging the flue gas generated by combustion upwards, and the lower end opening of the smoke guide channel is connected to the combustion port so that a combustion area for the flame to burn is formed in the smoke guide channel;

[0013] A heat insulation structure is formed in the side wall of the smoke guide channel, and the heat insulation structure includes:

[0014] A near heat flow cavity and a far heat flow cavity arranged in the side wall of the smoke guide channel, the near heat flow cavity being placed between the far heat flow cavity and the smoke guide channel;

[0015] An overflow hole channel for connecting the near heat flow cavity and the far heat flow cavity;

[0016] An air outlet channel for connecting the near heat flow cavity and the smoke guide channel;

[0017] A first air inlet channel for connecting the far heat flow cavity and the external space of the smoke guide housing.

[0018] In some solutions, at least two first air inlet channels are provided, and the two first air inlet channels are spaced apart vertically, where: one first air inlet channel is connected to the upper end region of the far heat flow cavity; the other first air inlet channel is connected to the lower end region of the far heat flow cavity.

[0019] In some solutions, at least two air outlet channels are provided, and the two air outlet channels are spaced apart vertically, where: one air outlet channel is connected to the upper end region of the near heat flow cavity; the other air outlet channel is connected to the lower end region of the near heat flow cavity.

[0020] In some solutions, the air outlet channel is connected to the upper end region of the near heat flow cavity; and, a second air inlet channel for connecting the lower end region of the near heat flow cavity and the external space of the smoke guide housing is provided in the bottom wall of the near heat flow cavity.

[0021] In some solutions, the second air inlet channel is configured to extend vertically so that: the air in the external space can flow upwards into the near heat flow cavity from the second air inlet channel in a manner adapted to the upward discharge of the flue gas.

[0022] In some solutions, the overflow hole channel is configured such that: one end opening is connected to the middle region of the near heat flow cavity, and the other end opening is connected to the middle region of the far heat flow cavity.

[0023] In some solutions, a flow guiding portion protruding into the smoke guiding channel is provided on the side wall of the smoke guiding channel; the inside of the flow guiding portion is provided with a cavity and is communicated with the near heat flow cavity; moreover, the outer wall of the flow guiding portion includes: a flow guiding wall facing the combustion port, which is inclined so as to guide the air flow flowing upward from the side wall of the smoke guiding channel to the center of the smoke guiding channel; a back flow wall facing away from the combustion port; and a connecting wall extending vertically and connecting the flow guiding wall and the back flow wall; an air outlet channel is arranged in the back flow wall.

[0024] In some solutions, a flow guiding portion protruding into the smoke guiding channel is provided on the side wall of the smoke guiding channel; the inside of the flow guiding portion is provided with a cavity and is communicated with the near heat flow cavity; moreover, the outer wall of the flow guiding portion includes: a flow guiding wall facing the combustion port, which is inclined so as to guide the air flow at the side wall of the smoke guiding channel to the center of the smoke guiding channel; a back flow wall facing away from the combustion port; and a connecting wall extending vertically and connecting the flow guiding wall and the back flow wall; an air outlet channel is arranged in the connecting wall.

[0025] In some solutions, a stepped flow portion extending horizontally and disposed below the flow guiding portion is formed in a bent manner on the side wall of the smoke guiding channel; a supplementary air channel is provided in the stepped flow portion for the air in the external space of the smoke guiding housing to enter the smoke guiding channel.

[0026] The gas water heater includes the combustion assembly described in any of the above solutions.

[0027] The main beneficial effects of the above technical solutions are as follows:

[0028] 1. By providing a heat resistance structure located in the side wall of the smoke guiding channel in the smoke guiding housing, which can use cold air as a heat insulation medium, the heat formed by the flame combustion in the smoke guiding housing can be blocked from overflowing outward, effectively controlling the surface temperature of the combustion assembly.

[0029] 2. The overall heat resistance structure is simpler, and the production cost can be better reduced.

[0030] 3. The heat resistance structure of the double-layer cavity can further improve the blocking effect on heat overflow, effectively controlling the surface temperature of the combustion assembly.

[0031] 4. In addition to forming air-cooled heat insulation, the heat resistance air flow can also bring back the dissipated heat to the smoke guiding channel for heat exchange with the heat exchanger, improving the overall effective heat output rate of the combustion assembly to form a high-efficiency gas combustion structure.

[0032] 5. By forming the heat resistance structure, when the combustion assembly performs combustion work, more and more stable oxygen in the external space can be input into the smoke guiding channel, so as to better form a uniform oxygen and stable combustion chamber in the smoke guiding housing.

[0033] 6. Connect an air outlet channel to the upper end area of the near heat flow cavity; connect the other air outlet channel to the lower end area of the near heat flow cavity, which can form a heat-blocking air flow with a larger area in the near heat flow cavity and improve the heat-blocking effect.

[0034] 7. On the basis of the above-mentioned air outlet channels, connect one end opening of the flow-through hole channel to the middle area of the near heat flow cavity, and the other end opening to the middle area of the far heat flow cavity. While forming a large-area air flow for heat blocking, for both air flows, they have a short flow path, enabling each air flow to better and faster bring the heat dissipated to the near heat flow cavity back to the smoke guide channel, and it is not easy to have uneven heat blocking, so as to further improve the overall heat-blocking effect.

[0035] 8. Connect the air outlet channel to the upper end area of the near heat flow cavity, and a second air inlet channel is also provided in the bottom wall of the near heat flow cavity, so as to form a heat-blocking air flow with a larger area in the near heat flow cavity and improve the heat-blocking effect.

[0036] 9. By setting the air compensation channel, on the one hand, it can further increase the air intake volume so that the gas can burn better and more fully. On the other hand, combined with the above-mentioned diversion part, with the same other settings, adding the air compensation channel can increase the overall air intake volume, and then can better increase the gas flow rate in the smoke guide channel at the connection wall, and further provide assistance for the formation and smooth flow of the heat-blocking air flow, so as to better block the heat in the smoke guide channel from overflowing outward.

[0037] Further or more detailed beneficial effects will be described in combination with specific embodiments in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The following further describes the present invention with reference to the drawings:

[0039] Figure 1 It is a schematic diagram of the internal structure of a gas water heater.

[0040] Figure 2 It is a schematic diagram of the installation structure of the combustion assembly.

[0041] Figure 3 It is a cross-sectional view of the combustion assembly.

[0042] Figure 4 It is a schematic diagram of the structure of the heat exchanger.

[0043] Figure 5 It is a cross-sectional view of the smoke guide housing.

[0044] Figure 6 It is a schematic diagram of the assembly structure of the smoke guide housing.

[0045] Figure 7Schematic cross-sectional view of the smoke guide housing when there are two air outlet channels.

[0046] Figure 8 Schematic structural view of the air outlet channel arranged on the diversion part.

[0047] Figure 9 Schematic structural view of the smoke guide housing when there is a second air inlet channel.

[0048] Figure 10 Schematic view of the setting of the air supplement channel.

[0049] Figure 11 Schematic structural view of a kind of smoke guide housing. Detailed implementation mode

[0050] The following is a specific example description of the present invention in combination with embodiments:

[0051] Embodiment:

[0052] The gas water heater, as shown in the appendix Figure 1 mainly includes a water heater housing and several functional components placed inside the water heater housing. The several functional components mainly include: a combustion assembly for forming a high-temperature flame, a heat exchanger 3 having a water pipe and used to transfer high temperature to the cold water in the water pipe, and a blower assembly 4 for forming a directional air flow.

[0053] Specifically, as shown in the appendix Figure 1 As an example, the combustion assembly includes a burner 1 and a smoke guide housing 2. The smoke guide housing 2 is detachably fixedly connected to the burner 1 by a detachable connection method such as screws (for example, detachably fixedly connected to the burner housing 1.1 below 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.

[0054] 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. Exactly, as shown in the appendix Figure 3 As an example, 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, several 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 arranged 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.).

[0055] A gas passage for the inflow of gas is formed inside the burner panel 1.2. The lower end of the gas passage is used to connect to the gas transmission pipeline, and the upper end is connected to the combustion port 1.11, so that gas can be transported through the burner panel 1.2 to the combustion port 1.11.

[0056] The lower end of the air intake passage 1.12 is open for air to flow in; the upper end is connected to the combustion port 1.11, so that external air can be transported from the air intake passage 1.12 to the combustion port 1.11.

[0057] The smoke guide housing 2 is arranged above the burner 1, and the smoke guide housing 2 has a smoke guide passage 2.1 that is connected to the combustion port 1.11 and discharges the smoke generated by combustion upward. The smoke guide passage 2.1 can be a vertically penetrating hole formed in the smoke guide housing 2, and the lower opening of the hole is connected to the combustion port 1.11.

[0058] 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 passage 2.1 is arranged in contact with 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 passage 2.1), so that a combustion area for flame combustion is formed in the smoke guide passage 2.1. The channel diameter of the smoke guide passage 2.1 is often greater than or equal to the opening diameter of the combustion port 1.11.

[0059] During operation, the gas is transported from the gas passage inside the burner panel 1.2 to the combustion port 1.11, the air flows from the air intake passage 1.12 to the combustion port 1.11, and the ignition device 1.3 is controlled to be turned on for ignition, so that the gas at the combustion port 1.11 of the burner 1 can be ignited to form an upward gushing combustion flame. The combustion flame surges into the smoke guide passage 2.1 for combustion, so that a combustion area for flame combustion is formed in the smoke guide passage 2.1. At this time, the smoke and heat generated by combustion enter the smoke guide passage 2.1 and flow upward under the guiding action of the smoke guide passage 2.1.

[0060] The heat exchanger 3 is placed above the smoke guide housing 2 and is used to exchange heat with the high-temperature smoke in the smoke guide passage 2.1 to form hot water.

[0061] Specifically, as an example shown in the appendix Figure 4 The heat exchanger 3 includes a heat exchange housing 3.1. The heat exchange housing 3.1 can be detachably connected to the smoke guide housing 2 by, for example, screws, or connected to other external support structures, such as the water heater housing. The heat exchange housing 3.1 has a heat exchange passage 3.11 with both ends being penetrated (as shown in the appendix Figure 3As 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.

[0062] Meanwhile, the heat exchanger 3 further comprises a heat exchange pipe 3.2, one end of which has a water inlet for water inlet and the other end of which has a water outlet for water outlet; the heat exchange pipe 3.2 is connected to the heat exchange housing 3.1 and has a portion disposed in the heat exchange channel 3.11. Implementation: When combustion is performed to form flames and high-temperature flue gas as described above, the high-temperature flue gas flows into the heat exchange channel 3.11 to transfer heat to the portion of the heat exchange pipe 3.2 disposed in the heat exchange channel 3.11, and at the same time, cold water is transported to the water inlet of the heat exchange pipe 3.2 through, for example, a tap water pipe, and 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.

[0063] In some cases, a plurality 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) may be further provided in the heat exchange channel 3.11. The heat exchange fins 3.3 have a portion that fits 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 in a better and larger area, so as to further improve the heat exchange effect on the cold water in the heat exchange pipe 3.2.

[0064] The fan assembly 4 is a fan structure used in a gas water heater to form an airflow, and is configured to form an airflow that drives the smoke from the smoke guide channel 2.1 to flow into the heat exchange channel 3.11.

[0065] The fan assembly 4 can be connected to the heat exchange housing 3.1, placed at the upper end opening of the heat exchange channel 3.11, and configured to: suck the smoke in the smoke guide channel 2.1 to drive the smoke from the smoke guide channel 2.1 into the heat exchange channel 3.11. At this time, the fan assembly 4 is also provided with a smoke exhaust pipe for directional exhaust of the sucked smoke, and the smoke exhaust pipe is used to communicate with the smoke exhaust port in the building to directional exhaust the smoke.

[0066] The fan assembly 4 can also be connected to the burner 1, placed at the opening of the lower end of the air intake channel 1.12, and configured to blow the smoke in the smoke guide channel 2.1 upwards to drive the smoke from the smoke guide channel 2.1 into the heat exchange channel 3.11. At this time, the upper end opening of the heat exchange channel 3.11 is used to communicate with the smoke exhaust port in the building.

[0067] In summary, the combustion component, the heat exchanger 3, and the blower component 4 together constitute the main components of the gas water heater. In addition, the gas water heater further includes a number of electrical components disposed outside the combustion component. When the combustion component 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 component, and in severe cases, will greatly reduce the service life of the gas water heater.

[0068] Based on this, a combustion component that can block the heat overflow in the smoke guide housing 2 and can better reduce the surface temperature of the smoke guide housing 2 is needed. And a gas water heater equipped with this combustion component is proposed.

[0069] 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 setting up a complex pipeline structure, resulting in problems such as a complex pipeline structure and difficult installation of the combustion component; moreover, in order to better prevent water leakage and water body corrosion, the water-cooling pipeline structure often requires a large cost.

[0070] In order to solve the above problems while being able to better simplify the structure and reduce costs, the present application proposes: a combustion component that combines the gas combustion characteristics to block the heat from dissipating outward through a simple structure and has higher economy. And a gas water heater equipped with this combustion component is proposed.

[0071] As an example, as shown in the attached Figure 3 and the attached Figure 5 The combustion component in this embodiment further includes a heat insulation structure formed in the side wall of the smoke guide channel 2.1.

[0072] Specifically, the heat insulation structure includes a near heat flow cavity 2.2a and a far heat flow cavity 2.2b provided in the side wall of the smoke guide channel 2.1. The near heat flow cavity 2.2a is disposed between the far heat flow cavity 2.2b and the smoke guide channel 2.1; an over-flow hole 2.211 for connecting the near heat flow cavity 2.2a and the far heat flow cavity 2.2b; an air outlet hole 2.4 for connecting the near heat flow cavity 2.2a and the smoke guide channel 2.1; a first air inlet hole 2.3 for connecting the far heat flow cavity 2.2b and the external space of the smoke guide housing 2.

[0073] For example, as shown in the attached Figure 3 and the attached Figure 5 In this embodiment, a heat insulation cavity 2.2 in the form of a cavity structure is provided in the side wall of the smoke guide channel 2.1. For example, as shown in the attached Figure 6As shown in the figure, the smoke guide housing 2 in this embodiment mainly includes an inner housing 2a with a smoke guide channel 2.1 inside, and an outer plate member 2b fixedly connected to the outer periphery of the inner housing 2a through, for example, screws. There is a spaced part between the inner housing 2a and the outer plate member 2b, and this part forms a heat insulation cavity 2.2.

[0074] A partition plate 2.21 extending vertically is arranged in the heat insulation cavity 2.2. It divides the heat insulation cavity 2.2 into a near heat flow cavity 2.2a and a far heat flow cavity 2.2b, and the near heat flow cavity 2.2a is placed between the far heat flow cavity 2.2b and the smoke guide channel 2.1.

[0075] Meanwhile, an air outlet channel 2.4 in the form of a hole structure is arranged in a side wall of the heat insulation cavity 2.2 close to the smoke guide channel 2.1 in the transverse direction. One end opening of the air outlet channel 2.4 is communicated with the smoke guide channel 2.1, and the other end opening is communicated with the near heat flow cavity 2.2a.

[0076] A first air inlet channel 2.3 in the form of a hole structure is arranged in a side wall of the heat insulation cavity 2.2 far from the smoke guide channel 2.1 in the transverse direction. One end opening of the first air inlet channel 2.3 is communicated with the far heat flow cavity 2.2b, and the other end opening is communicated with the external space of the smoke guide housing 2.

[0077] A flow-through hole channel 2.211 in the form of a hole structure is arranged in the partition plate 2.21. One end opening of the flow-through hole channel 2.211 is communicated with the near heat flow cavity 2.2a, and the other end opening is communicated with the far heat flow cavity 2.2b.

[0078] At this time, when a flame is formed in the combustion area of the smoke guide channel 2.1, it will consume oxygen and gas, and form high-temperature flue gas rising directly, so as to form a low-pressure area in the smoke guide channel 2.1. At this time, external air will enter the far heat flow cavity 2.2b from the first air inlet channel 2.3, flow into the near heat flow cavity 2.2a from the flow-through hole channel 2.211, and then flow out to the smoke guide channel 2.1 from the air outlet channel 2.4. Furthermore, a flowing air current can be formed in the heat insulation cavity 2.2, which is called a heat insulation air current. This heat insulation air current forms air-cooled heat insulation, which can bring back the heat dissipated from the surface of the smoke guide housing 2 by the smoke guide channel 2.1 to the smoke guide channel 2.1. It can not only block the heat formed by the flame combustion in the smoke guide housing 2 from overflowing outwards, effectively control the surface temperature of the combustion component, but also bring back the dissipated heat to the smoke guide 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.

[0079] In the above solution, as shown in the appendixFigure 7 and the attached Figure 8 As shown, a flow guiding portion 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.

[0080] Specifically, the inside of the flow guiding portion 2.6 is provided with a cavity and is connected to the near heat flow cavity 2.2a; moreover, the outer wall of the flow guiding portion 2.6 (that is, one side wall of the outer surface of the protruding flow guiding portion 2.6 for contacting the airflow in the smoke guiding channel 2.1) includes a flow guiding wall 2.61 facing the combustion port 1.11 (that is, 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 (that is, facing away from the airflow after the airflow is output from the combustion port 1.11), and a connecting wall 2.62 extending vertically (vertically extending or arcuately extending) and connecting the flow guiding wall 2.61 and the backflow wall 2.63. That is, the upper end of the connecting wall 2.62 is connected to the backflow wall 2.63, and the lower end is connected to the flow guiding wall 2.61 to connect the flow guiding wall 2.61 and the backflow wall 2.63. For example, as shown in the attached Figure 6 As shown, the outer wall of the flow guiding portion 2.6 includes a downward-facing flow guiding wall 2.61, an upward-facing backflow wall 2.63, and a connecting wall 2.62 that extends arcuately in the vertical direction.

[0081] Among them, the flow guiding 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, facilitating better subsequent utilization of the heat; 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.

[0082] At this time, as a way, the air outlet channel 2.4 can be provided on the backflow wall 2.63.

[0083] Or, as another way, the air outlet channel 2.4 is provided on the connecting wall 2.62; and the air outlet channel 2.4 is preferably inclined and extended so that the airflow in the heat blocking cavity 2.2 can be obliquely upwardly conveyed after flowing out from the air outlet channel 2.4. It is realized that the airflow flowing out from the air outlet channel 2.4 into the smoke guiding channel 2.1 can better conform to the flow of the rising flue gas in the smoke guiding channel 2.1, reduce unnecessary airflow impact, and at the same time improve the smoothness and stability of the rising flow of the flue gas and the rising flow of the heat blocking airflow, thereby improving the stability of the heat output of the combustion assembly while optimizing the blocking effect of the overflowing heat.

[0084] In any of the above - mentioned ways, the airflow formed by combustion in the smoke - guiding channel 2.1 is not likely to cause an unwanted obstructive effect on the airflow in the heat - resistant cavity 2.2, so that a heat - resistant airflow for blocking heat as described above can always be smoothly formed in the heat - resistant cavity 2.2.

[0085] Moreover, when the air - outlet channel 2.4 is provided on the connecting wall 2.62, due to the guiding effect of the guiding wall 2.61 on the airflow, the diameter of the smoke - guiding channel 2.1 at the connecting wall 2.62 will be driven to shrink. In this area, the flow velocity increases and the fluid pressure decreases; thus, it can better attract the airflow in the heat - resistant cavity 2.2, further improving the smoothness of the formation and circulation of the heat - resistant airflow (the airflow in which external air enters the heat - resistant cavity 2.2 from the first air - inlet channel 2.3 and then flows out of the air - outlet channel 2.4 into the smoke - guiding channel 2.1), so as to overall improve the heat - blocking effect on the overflowing heat and better reduce the surface temperature of the smoke - guiding housing 2.

[0086] Furthermore, when the guiding part 2.6 is provided, as shown in the appendix Figure 10 The side - wall part of the smoke - guiding channel 2.1 can also be bent to form a stepped - flow part 2.11 that extends horizontally and is placed below the guiding part 2.6. A supplementary air - hole channel 2.12 is provided in the stepped - flow part 2.11. The supplementary air - hole channel 2.12 is a channel provided in the stepped - flow part 2.11. The upper end of the channel is connected to the smoke - guiding channel 2.1, and the lower end is open, so that the air in the external space of the smoke - guiding housing 2 can enter the smoke - guiding channel 2.1 through the supplementary air - hole channel 2.12.

[0087] In this way, by setting the supplementary air - hole channel 2.12, on the one hand, it can further increase the air intake so that the gas can burn more fully. On the other hand, combined with the setting of the above - mentioned guiding part 2.6, with the rest of the settings being the same, adding the supplementary air - hole channel 2.12 can increase the overall air intake, and then can better increase the gas flow velocity in the smoke - guiding channel 2.1 at the connecting wall 2.62, further facilitating the formation and smooth circulation of the heat - resistant airflow, so as to better block the heat from overflowing out of the smoke - guiding channel 2.1.

[0088] The supplementary air - hole channel 2.12 in this embodiment is configured to extend vertically, so that the air in the external space can flow upward into the smoke - guiding channel 2.1 from the supplementary air - hole channel 2.12 in a manner that adapts to the upward discharge of the smoke. In this way, the airflow 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 close to the side - wall of the smoke - guiding channel 2.1, better blocking the heat from overflowing out of the smoke - guiding channel 2.1 and further improving the heat - blocking effect.

[0089] In any of the above solutions, the specific quantities and height positions of the first air inlet channels 2.3, the air outlet channels 2.4, and the flow-through channels 2.211 can be set according to requirements.

[0090] In this embodiment, as shown in the attached Figure 5 and the attached Figure 6 figures, there can be at least two first air inlet channels 2.3, and the two first air inlet channels 2.3 are spaced apart vertically. Among them: one first air inlet channel 2.3 communicates with the upper region of the far heat flow cavity 2.2b; the other first air inlet channel 2.3 communicates with the lower region of the far heat flow cavity 2.2b. (In the vertical direction, by trisecting the far heat flow cavity 2.2b, the far heat flow cavity 2.2b is sequentially divided from top to bottom into: an upper region, a middle region, and a lower region.)

[0091] In this way, the heat insulation structure has two air inlets spaced apart vertically, so as to cover a larger air inlet area, improve the air intake smoothness and air intake volume when the air flows into the far heat flow cavity 2.2b during operation, and further better form the above-mentioned heat insulation air flow to improve the heat blocking effect.

[0092] At this time, there are at least two ways to set the air outlet channels 2.4. Specifically:

[0093] In this embodiment, as one way:

[0094] As shown in the attached Figure 7 figures, there are at least two air outlet channels 2.4, and the two air outlet channels 2.4 are spaced apart vertically; and, among them: one air outlet channel 2.4 communicates with the upper region of the near heat flow cavity 2.2a; the other air outlet channel 2.4 communicates with the lower region of the near heat flow cavity 2.2a. (In the vertical direction, by trisecting the near heat flow cavity 2.2a, the near heat flow cavity 2.2a is sequentially divided from top to bottom into: an upper region, a middle region, and a lower region.)

[0095] In this way, as shown in the attached Figure 7 figures, the air flow flowing into the near heat flow cavity 2.2a will be divided into two paths. One path of air flow circulates upward in the near heat flow cavity 2.2a and flows into the smoke guide channel 2.1 through one air outlet channel 2.4 at the upper end; the other path of air flow circulates downward in the near heat flow cavity 2.2a and flows into the smoke guide channel 2.1 through the other air outlet channel 2.4 at the lower end. A larger area of heat insulation air flow can be formed in the near heat flow cavity 2.2a, improving the heat blocking effect.

[0096] Moreover, at this time, the overcurrent channel 2.211 can be configured such that one end opening communicates with the middle region of the near heat flow cavity 2.2a, and the other end opening communicates with the middle region of the far heat flow cavity 2.2b. In this way, while forming a large-area air flow for heat resistance as described above, for both air flows, they both have a short flow path, enabling each air flow to better and faster bring the heat dissipated to the near heat flow cavity 2.2a back to the smoke guiding channel 2.1, and it is not easy to have uneven heat blockage, so as to further improve the overall heat blocking effect.

[0097] In the above solution, considering that the intake difficulty of the first intake channel 2.3 located above is higher than that of the first intake channel 2.3 located below. In this embodiment, as shown in the appendix Figure 10 The first intake channel 2.3 can have several and is divided into a first part and a second part located below the first part, where: the first intake channel 2.3 in the first part communicates with the upper end region of the far heat flow cavity 2.2b; the first intake channel 2.3 in the second part communicates with the lower end region of the far heat flow cavity 2.2b. And the number of the several first intake channels 2.3 in the first part is more than the number of the first intake channels 2.3 in the second part.

[0098] Furthermore, considering that heat is likely to accumulate at the corners of the cavity far from the central region of the smoke guiding channel 2.1, in this embodiment, as shown in the appendix Figure 10 The first intake channels 2.3 in the first part are spaced apart in the horizontal direction, and the closer to the corner of the cavity far from the central region of the smoke guiding channel 2.1, the smaller the interval between adjacent first intake channels 2.3; in this way, more first intake channels 2.3 can be provided at the corners of the cavity far from the central region of the smoke guiding channel 2.1 to better and more evenly block the overflowing heat over the entire area.

[0099] Among them, for the other air outlet channel 2.4 placed at the lower end, it can be arranged in alignment with the combustion area. That is, the end opening of the other air outlet channel 2.4 far from the near heat flow cavity 2.2a is arranged in alignment with the combustion area; so that: the air flow output from the other air outlet channel 2.4 can be transported to the combustion area of the smoke guiding channel 2.1. In this way, the air with a certain amount of heat in the near heat flow cavity 2.2a can participate in the combustion in the combustion component, which can improve the overall combustion efficiency and combustion effect of the combustion component.

[0100] At this time, for the setting of the two air outlet channels 2.4, a guiding part 2.6 is arranged corresponding to each air outlet channel 2.4, and each air outlet channel 2.4 is arranged in the backflow wall 2.63 or the connecting wall 2.62 of the guiding part 2.6 that matches it.

[0101] As another way:

[0102] As shown in the appendix Figure 8 and the appendix Figure 9 As shown, the air outlet channel 2.4 is preferably connected to the upper end region of the near heat flow cavity 2.2a, achieving: air flow can flow into the near heat flow cavity 2.2a from the middle region of the near heat flow cavity 2.2a and flow out from the upper end region of the near heat flow cavity 2.2a.

[0103] At this time, in this embodiment, as shown in the appendix Figure 9 and the appendix Figure 10 As shown, a second air inlet channel 2.2a1 is further provided in the bottom wall of the near heat flow cavity 2.2a (i.e., the cavity wall at the bottom of the near heat flow cavity 2.2a). So as to form a heat-blocking air flow with a larger area in the near heat flow cavity 2.2a and improve the heat-blocking effect.

[0104] Furthermore, that is, the second air inlet channel 2.2a1 is a vertically penetrating channel provided in the bottom wall of the near heat flow cavity 2.2a. The upper end of this channel is connected to the near heat flow cavity 2.2a and the lower end is open, so that: air in the external space can flow upward into the near heat flow cavity 2.2a from the second air inlet channel 2.2a1 in a manner adapted to the upward discharge of the flue gas. In this way, driven by the upward flow of the high-temperature flue gas, the air in the external space of the smoke guide housing 2 can flow more smoothly upward into the near heat flow cavity 2.2a and flow smoothly upward to the air outlet channel 2.4, so as to better and more stably form a continuously flowing heat-blocking air flow and optimize the heat-blocking effect of the overflowing heat.

[0105] At this time, the flow-through channel 2.211 in this embodiment can also be configured as: one end opening is connected to the middle region of the near heat flow cavity 2.2a, and the other end opening is connected to the middle region of the far heat flow cavity 2.2b. Referring to the description of the air flow in the near heat flow cavity 2.2a above, to improve the air flow balance in the far heat flow cavity 2.2b.

[0106] Moreover, further, when the second air inlet channel 2.2a1 is provided:[[]]

[0107] On at least one side wall of the near heat flow cavity 2.2a, there can also be provided: a convex portion protruding into the near heat flow cavity 2.2a that is horizontally (in the horizontal direction) 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). The setting of this convex portion makes: there is a narrow mouth area with a reduced diameter in the near heat flow cavity 2.2a; for example, by setting the convex portion, it makes: in the vertical direction, the diameter (the diameter or size of the cavity opening) of the near heat flow cavity 2.2a is arranged in a large, small, large pattern (i.e., first decreasing and then increasing); and, the partial region (narrow mouth area) with a reduced diameter of the near heat flow cavity 2.2a is horizontally opposite to the central region of the smoke guide channel 2.1.

[0108] For example, as shown in the appendix Figure 9As shown in the figure, on one side wall of the near heat flow cavity 2.2a that is laterally close to the smoke guiding channel 2.1, there is provided: a first convex portion 2.2a that is laterally opposite to the central region of the smoke guiding channel 2.1 and protrudes towards the near heat flow cavity 2.2a.

[0109] By providing the convex portion, when the air flow in the near heat flow cavity 2.2a flows through the narrow opening region that is laterally opposite to the central region of the smoke guiding channel 2.1, the flow rate can be increased to a certain extent. It can be achieved that: not only can the contact area between the air flow and the smoke guiding housing 2 be increased, and the heat transferred to the side wall of the smoke guiding channel 2.1 can be better brought back into the smoke guiding channel 2.1 to optimize 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 air flow rate, the region where heat is more likely to overflow can pass through a faster air flow to bring the heat back into the smoke guiding channel 2.1 more quickly; while the region where the heat overflows more slowly passes through a slower and larger air flow rate to stably, slowly and fully transfer heat to the side wall of the smoke guiding channel 2.1 and bring the heat back into the smoke guiding channel 2.1, thereby improving the overall heat insulation effect.

[0110] In some solutions, in the direction from bottom to top, the cross-sectional area of the convex portion can gradually increase to better guide the air flow to flow smoothly from bottom to top in the near heat flow cavity 2.2a.

[0111] Further, as shown in the appendix Figure 9 As shown, on the side wall of the near heat flow cavity 2.2a facing away from the smoke guiding channel 2.1, there is a part that is laterally aligned with the convex portion (that is: the partition plate 2.21 has a part that is laterally aligned with the convex portion), and some flow holes 2.211 are provided in this part. When the heat blocking air flow is formed as described above, the air flow in the far heat flow cavity 2.2b can flow into the near heat flow cavity 2.2a more quickly through these flow holes 2.211, increasing the overall flow rate of the heat blocking air flow, further optimizing and improving the blocking effect on the overflowing heat, and better reducing the surface temperature of the smoke guiding housing 2.

[0112] As shown in the appendix Figure 11 As shown, the side wall of the far heat flow cavity 2.2b can also be provided with: a rib portion 2b.1 protruding into the far heat flow cavity 2.2b; by providing the rib portion 2b.1, not only can the contact area between the heat blocking air flow and the smoke guiding housing 2 be increased, so that more heat can be brought back into the smoke guiding housing 2 through the heat blocking air flow, but also the flow of the heat blocking air flow can be guided to a certain extent, and then a more uniform heat blocking air flow can be formed better according to the requirements; for example Figure 11 As shown, several rib portions 2b.1 in this embodiment can be spaced apart in the horizontal direction, and the interval between adjacent rib portions 2b.1 is larger the farther away from the central region of the smoke guiding channel 2.1.

[0113] The above are only the preferred embodiments of the present invention and do not limit the scope of the present invention.

Claims

1. Combustion assembly, characterized in that, Comprising: A burner (1) for forming a flame, the burner (1) having a combustion port (1.11) through which the flame ejects outward; A smoke guide housing (2) detachably fixed to the burner (1), which has therein: a smoke guide passage (2.1) communicating with the combustion port (1.11) and discharging the smoke generated by combustion upward, and a lower end opening of the smoke guide passage (2.1) being connected to the combustion port (1.11) so that a combustion area for the flame to burn is formed in the smoke guide passage (2.1); A heat insulation structure is formed in the side wall of the smoke guide passage (2.1), and the heat insulation structure includes: A near heat flow cavity (2.2a) and a far heat flow cavity (2.2b) provided in the side wall of the smoke guide passage (2.1), the near heat flow cavity (2.2a) being disposed between the far heat flow cavity (2.2b) and the smoke guide passage (2.1); A flow through hole (2.211) for communicating the near heat flow cavity (2.2a) and the far heat flow cavity (2.2b); An air outlet passage (2.4) for communicating the near heat flow cavity (2.2a) with the smoke guide passage (2.1); A first air inlet passage (2.3) for communicating the far heat flow cavity (2.2b) with the external space of the smoke guide housing (2); The side wall of the smoke guide passage (2.1) is provided with: a flow guiding portion (2.6) protruding into the smoke guide passage (2.1); The inside of the flow guiding portion (2.6) is provided as a cavity and is communicated with the near heat flow cavity (2.2a); And, the outer wall of the flow guiding portion (2.6) includes: A flow guiding wall (2.61) facing the combustion port (1.11), which is inclined so as to guide the air flow flowing upward from the side wall of the smoke guide passage (2.1) to the center of the smoke guide passage (2.1); A back flow wall (2.63) facing away from the combustion port (1.11); And a connecting wall (2.62) extending vertically and connecting the flow guiding wall (2.61) and the back flow wall (2.63); The air outlet passage (2.4) is provided in the back flow wall (2.63), or the air outlet passage (2.4) is provided in the connecting wall (2.62).

2. The combustion assembly according to claim 1, wherein: There are at least two first air inlet passages (2.3), and the two first air inlet passages (2.3) are spaced apart vertically, wherein: One first air inlet passage (2.3) communicates with the upper end region of the far heat flow cavity (2.2b); The other first air inlet passage (2.3) communicates with the lower end region of the far heat flow cavity (2.2b).

3. The combustion assembly according to claim 1, characterized in that: There are several first air inlet passages (2.3), which are divided into a first part and a second part located below the first part, wherein: The first air inlet passages (2.3) in the first part communicate with the upper end region of the far heat flow cavity (2.2b); The first air inlet passages (2.3) in the second part communicate with the lower end region of the far heat flow cavity (2.2b); Moreover, the number of the first air inlet channels (2.3) in the first part is greater than that in the second part.

4. The combustion assembly according to claim 3, characterized in that: Some of the first air inlet channels (2.3) in the first part are spaced apart in the horizontal direction, and the spacing between adjacent air inlet channels (2.3) becomes smaller as the distance from the central region of the smoke guiding channel (2.1) increases.

5. The combustion assembly according to any one of claims 2 to 4, characterized in that: At least two air outlet channels (2.4) are provided, and the two air outlet channels (2.4) are spaced apart in the vertical direction, where: One of the air outlet channels (2.4) communicates with the upper end region of the near heat flow cavity (2.2a); The other air outlet channel (2.4) communicates with the lower end region of the near heat flow cavity (2.2a).

6. The combustion assembly according to any one of claims 2 to 4, characterized in that: The air outlet channel (2.4) communicates with the upper end region of the near heat flow cavity (2.2a); Moreover, a second air inlet channel (2.2a1) is provided in the bottom wall of the near heat flow cavity (2.2a) for communicating the lower end region of the near heat flow cavity (2.2a) with the external space of the smoke guiding housing (2).

7. The combustion assembly according to claim 6, characterized in that: The second air inlet channel (2.2a1) is configured to extend in the vertical direction so that air in the external space can flow upward into the near heat flow cavity (2.2a) from the second air inlet channel (2.2a1) in a manner adapted to the upward discharge of the smoke.

8. The combustion assembly according to claim 5, wherein: The flow-through channel (2.211) is configured such that one end opening communicates with the middle region of the near heat flow cavity (2.2a), and the other end opening communicates with the middle region of the far heat flow cavity (2.2b).

9. The combustion assembly according to claim 1, wherein: The side wall of the smoke guiding channel (2.1) is bent to form a stepped flow portion (2.11) that extends horizontally and is disposed below the guiding portion (2.6); A supplementary air hole channel (2.12) is provided in the stepped flow portion (2.11) for allowing air in the external space of the smoke guiding housing (2) to enter the smoke guiding channel (2.1).

10. The combustion assembly according to claim 1, characterized in that: The side wall of the far heat flow cavity (2.2b) is provided with a rib portion (2b.1) protruding into the far heat flow cavity (2.2b); Some of the rib portions (2b.1) are spaced apart in the horizontal direction, and the spacing between adjacent rib portions (2b.1) becomes larger as the distance from the central region of the smoke guiding channel (2.1) increases.

11. Gas water heater, characterized in that: Comprising the combustion assembly according to any one of claims 1 to 10.

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