Combustion heat exchange module and gas water heater with same

Abstract

The utility model relates to the technical field of household appliances, in particular to a combustion heat exchange module and a gas water heater with the same, and the combustion heat exchange module comprises a combustor, a heat exchanger, a heat exchanger and a heat exchanger, the heat exchanger comprises a heat exchange shell and a heat exchange pipeline, and the heat exchange shell is provided with a heat exchange channel for accommodating part of the heat exchange pipeline; the smoke guide shell is provided with a smoke guide channel for conveying smoke of the combustion port into the heat exchange channel, and the smoke guide channel is provided with a smoke outlet communicated with the heat exchange channel; a smoke gathering structure is arranged in the smoke guide channel and is configured to guide smoke on the side wall of the smoke guide channel to be output into the heat exchange channel from the center area of the smoke outlet. The combustion heat exchange module can optimize and improve the heat exchange efficiency; the utility model further discloses the gas water heater with the combustion heat exchange module.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and more specifically to a combustion heat exchange module and a gas water heater having the module. Background Technology

[0002] Gas water heaters, as household heating devices that rapidly heat cold water through gas combustion, typically consist of a combustion heat exchange module, aerodynamic components (such as a fan assembly to promote airflow), and associated electrical piping. The combustion heat exchange module, a key thermal unit, comprises a combustion assembly (including a burner and a flue gas casing) and a heat exchanger. The combustion assembly generates a high-temperature flame through fuel oxidation, while the heat exchanger features a serpentine water path that facilitates the gradual heating of cold water through heat conduction. However, the heat exchange efficiency of existing combustion heat exchange modules still needs improvement. Utility Model Content

[0003] One of the purposes of this invention is to address the shortcomings of existing technologies by providing a combustion heat exchange module that can optimize and improve heat exchange efficiency.

[0004] The second objective of this utility model is to address the shortcomings of the existing technology by providing a gas water heater having the aforementioned combustion heat exchange module.

[0005] The technical solution of this utility model is as follows:

[0006] Combustion heat exchange module, including:

[0007] A burner having a combustion port for discharging flue gas;

[0008] A heat exchanger comprising a heat exchange housing and heat exchange pipes, the heat exchange housing having heat exchange passages for accommodating a portion of the heat exchange pipes;

[0009] A smoke guide housing, comprising: a smoke guide channel for conveying flue gas from the combustion port to a heat exchange channel, the smoke guide channel having a smoke outlet connected to the heat exchange channel;

[0010] The flue gas guide channel is equipped with a flue gas convergence structure, which is configured to guide the flue gas on the side wall of the flue gas guide channel to be output from the central area of ​​the flue gas outlet to the heat exchange channel.

[0011] In some schemes, in the flue gas conveying direction from the combustion port to the heat exchange channel, the flue gas guide channel has a section with a reduced diameter, and the sidewall of this section includes: an inclined extension to guide the flue gas at the sidewall of the flue gas guide channel to a converging wall in the central region of the flue gas outlet;

[0012] The gas converging wall forms a flue gas converging structure.

[0013] In some designs, the sidewalls of the smoke guide duct are equipped with: protruding flow-gathering plates in the smoke guide duct;

[0014] The converging plate extends at an angle and can guide the flue gas at the side wall of the smoke guide channel to the central area of ​​the smoke outlet to form a flue gas converging structure.

[0015] In some designs, a connecting arm is provided at one end of the converging plate that protrudes from the side wall of the smoke guide channel;

[0016] The connecting arm is fixed to the side wall of the smoke guide channel.

[0017] In some designs, a heat-resistant structure is formed in the sidewall of the smoke guide channel, and the heat-resistant structure includes:

[0018] A heat-insulating cavity is installed in the side wall of the smoke guide channel;

[0019] An air outlet is provided to connect the heat-insulating cavity and the smoke guiding channel;

[0020] An air inlet channel that connects the heat-insulating cavity to the external space of the smoke guide shell.

[0021] In some designs, a partition plate is provided in the heat-insulating cavity, which divides the heat-insulating cavity into: a near-heat flow cavity connected to the air outlet channel, and a far-heat flow cavity connected to the air inlet channel.

[0022] The near-heat flow cavity is positioned between the far-heat flow cavity and the smoke guide channel;

[0023] The partition plate is provided with a flow channel for connecting the near-heat flow cavity and the far-heat flow cavity.

[0024] In some designs, at least two air intake channels are provided, which are vertically spaced apart, wherein:

[0025] An air inlet channel is connected to the upper region of the heat flow cavity;

[0026] Another air intake channel is connected to the lower region of the far-heat flow cavity.

[0027] In some designs, the air intake channels are multiple and divided into a first section and a second section located below the first section, wherein:

[0028] The air intake channel in the first part is connected to the upper region of the far-heat flow cavity;

[0029] The air intake channel in the second part is connected to the lower part of the heat flow cavity;

[0030] Furthermore, the number of air intake channels in the first part is greater than the number of air intake channels in the second part.

[0031] In some designs, the air intake channels in the first part are spaced apart in the horizontal direction, and the further away from the center of the smoke guide channel, the smaller the interval between adjacent air intake channels.

[0032] In some designs, at least two vents are provided, which are vertically spaced apart, wherein:

[0033] An air outlet is connected to the upper region of the near-heat flow cavity;

[0034] Another vent is connected to the lower region of the near-heat flow cavity.

[0035] In some designs, the flow channel is configured such that one end is open to the central region of the near-hot flow cavity, and the other end is open to the central region of the far-hot flow cavity.

[0036] In some designs, the sidewall of the heat-insulating cavity is provided with a protrusion that extends into the heat-insulating cavity;

[0037] Several protrusions are distributed at intervals in the horizontal direction, and the further away from the center area of ​​the smoke guide channel, the greater the interval between adjacent protrusions.

[0038] A gas water heater comprising the combustion heat exchange module described in any of the above embodiments.

[0039] The main beneficial effects of the above technical solution are as follows:

[0040] 1. By setting up a flue gas convergence structure, the flue gas in the flue gas guide channel can be more concentrated and flow into the heat exchange channel more quickly. When the combustion heat exchange module is working (water flows in the heat exchange pipe, and the generated flue gas exchanges heat with the heat exchange pipe, causing the heat exchange pipe to heat up), not only can the flue gas better carry out concentrated heat radiation, quickly and efficiently heating the heat exchange pipe; but the rapidly flowing flue gas can also better break the boundary layer formed by the previous flue gas on the surface of the heat exchange pipe, so that the high-temperature flue gas newly input into the heat exchange channel can have more sufficient thermal contact with the surface of the heat exchange pipe, further improving the heat exchange efficiency between the flue gas and the heat exchange pipe.

[0041] 2. By setting a heat-insulating structure in the smoke guide housing located in the side wall of the smoke guide channel, which can use cold air as a heat insulation medium, the heat generated by the flame combustion in the smoke guide housing can be prevented from overflowing outward, effectively controlling the surface temperature of the combustion components.

[0042] 3. The overall heat-insulating structure is simpler, which can better reduce production costs.

[0043] 4. In addition to creating air-cooled insulation, the heat-insulating airflow can also bring the dissipated heat back into the flue gas duct for heat exchange with the heat exchanger, thereby improving the overall effective heat output rate of the combustion components and forming a high-efficiency gas combustion structure.

[0044] 5. By forming a heat-resistant structure, when the combustion components are working, more and more stable oxygen from 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 shell.

[0045] Further or more detailed beneficial effects will be described in conjunction with specific embodiments in the detailed implementation. Attached Figure Description

[0046] The present invention will be further described below with reference to the accompanying drawings:

[0047] Figure 1 This is a schematic diagram of the internal structure of a gas water heater.

[0048] Figure 2 A schematic diagram of the combustion assembly installation structure.

[0049] Figure 3 This is a cross-sectional schematic diagram of the combustion assembly.

[0050] Figure 4 This is a schematic diagram of a heat exchanger.

[0051] Figure 5 A schematic diagram of the structure for the flow-concentrating wall.

[0052] Figure 6 A schematic diagram of the structure for the flow-concentrating plate.

[0053] Figure 7 This is a schematic diagram of the thermal assembly structure consisting of the near-heat flow cavity and the far-heat flow cavity.

[0054] Figure 8 This is a schematic diagram of the assembly structure of the smoke guide shell.

[0055] Figure 9 This is a schematic diagram of the structure of the flow guide section.

[0056] Figure 10 This is a schematic diagram of a smoke guide shell. Detailed Implementation

[0057] The present invention will be illustrated with specific examples below:

[0058] Example:

[0059] Gas water heater, as attached Figure 1As shown, it mainly includes a water heater shell and several functional components placed inside the water heater shell. The several functional components mainly include: a combustion heat exchange module (including: a combustion assembly for forming a high-temperature flame, a heat exchanger 3 with water pipes for transferring high temperature to cold water in the water pipes), and a fan assembly 4 for forming a directional airflow.

[0060] Specifically, for example, attached Figure 1 As shown, as an example, the combustion assembly includes a burner 1 and a flue gas housing 2. The flue gas housing 2 can be detachably (using a detachable connection method such as screws) or non-detachably (using a non-detachable connection method such as welding or integral molding) fixedly connected to the burner 1, or it can be not connected to the burner 1, but connected to other external support structures, such as the water heater casing.

[0061] The burner 1 includes a burner housing 1.1, the upper end of which has a combustion port 1.11 for the flame to be ejected outwards. More specifically, as shown in the attached... Figure 3 As an example, the burner housing 1.1 has an upward-facing opening at its upper end, which is a combustion port 1.11; and several burners 1.2 are installed in a hollow cavity inside the burner housing 1.1, 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 (the ignition device 1.3 is a conventional ignition device used in gas water heaters and gas stoves, such as an electric spark ignition device).

[0062] A gas passage for gas to flow into is formed inside the burner 1.2. The lower end of the gas passage is connected to the gas delivery pipeline, and the upper end is connected to the combustion port 1.11 so that the gas can be delivered to the combustion port 1.11 through the burner 1.2.

[0063] The lower end of the air intake passage 1.12 is open to allow air to flow in; the upper end is connected to the combustion port 1.11 so that external air can be delivered from the air intake passage 1.12 to the combustion port 1.11.

[0064] The smoke guide housing 2 is disposed above the burner 1, and the smoke guide housing 2 has a smoke guide channel 2.1 that communicates with the combustion port 1.11 and discharges the flue gas generated by combustion upward. The smoke guide channel 2.1 can be a vertically penetrating channel disposed in the smoke guide housing 2, and the lower end of the channel is connected to the combustion port 1.11.

[0065] Meanwhile, to better prevent the heat and smoke generated during combustion from escaping, the lower opening of the smoke guide channel 2.1 is connected to the combustion port 1.11 (i.e., the port of the combustion port 1.11 is close to or sufficiently adjacent to the port of the lower opening of the smoke guide channel 2.1), so that a combustion zone for flame combustion is formed in the smoke guide channel 2.1. The diameter of the smoke guide channel 2.1 is often greater than or equal to the opening diameter of the combustion port 1.11.

[0066] During operation, gas is supplied from the gas passage inside the burner 1.2 to the combustion port 1.11, and air flows from the air intake passage 1.12 to the combustion port 1.11. The ignition device 1.3 is then activated for ignition, igniting the gas at the combustion port 1.11 of the burner 1 to form an upward-flowing combustion flame. This flame enters the smoke guide passage 2.1 for combustion, creating a combustion zone within the passage. Simultaneously, the flue gas and heat generated by combustion enter the smoke guide passage 2.1 and flow upwards under its guiding effect.

[0067] The heat exchanger 3 is placed above the flue gas housing 2 and is used to exchange heat with the high-temperature flue gas in the flue gas channel 2.1 to form hot water.

[0068] To be precise, as shown in the appendix Figure 4 As shown as an example, the heat exchanger 3 includes a heat exchange housing 3.1, which can be detachably connected to the flue gas housing 2 by means of, for example, screws, or it can be connected to other external support structures, such as the water heater casing. The heat exchange housing 3.1 has heat exchange channels 3.11 (as shown in the attached diagram) that are through-type at both ends. Figure 3 As shown, the heat exchange channel 3.11 is a vertically through-hole; the lower end of the heat exchange channel 3.11 is connected to the upper opening of the flue gas guide channel 2.1 so that the high-temperature flue gas generated by combustion in the flue gas guide channel 2.1 can flow upward into the heat exchange channel 3.11.

[0069] Meanwhile, the heat exchanger 3 also includes a heat exchange pipe 3.2, which has a water inlet at one end and a water outlet at the other end. The heat exchange pipe 3.2 is connected to the heat exchange shell 3.1 and has a portion placed in the heat exchange channel 3.11. Implementation: When combustion occurs 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 portion of the heat exchange pipe 3.2 placed in the heat exchange channel 3.11. Simultaneously, cold water is supplied to the water inlet of the heat exchange pipe 3.2 through, for example, a tap water pipe. This cold water is heated after flowing through the portion of the heat exchange pipe 3.2 placed in the heat exchange channel 3.11, and then hot water is output from the outlet for use.

[0070] In some cases, the heat exchange channel 3.11 may also be provided with several heat exchange fins 3.3 (the heat exchange fins 3.3 are sheet-like structures made of materials with good thermal conductivity such as steel strips, stainless steel strips, copper strips, and aluminum strips). The heat exchange fins 3.3 have a part that fits into the heat exchange pipe 3.2 to increase the heat exchange contact area with the high-temperature flue gas, so as to 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.

[0071] 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 flue gas from the flue gas channel 2.1 into the heat exchange channel 3.11.

[0072] The fan assembly 4 can be connected to the heat exchange housing 3.1, positioned at the upper opening of the heat exchange channel 3.11, and configured to draw in the flue gas from the smoke guide channel 2.1, driving the flue gas from the smoke guide channel 2.1 into the heat exchange channel 3.11. The fan assembly 4 is also equipped with a smoke exhaust duct for directional discharge of the drawn-in flue gas, which is connected to a smoke exhaust outlet in the building to directionally discharge the flue gas.

[0073] The fan assembly 4 can also be connected to the burner 1, positioned at the lower opening of the air intake passage 1.12, and configured to blow the flue gas in the smoke guide passage 2.1 upwards, thereby driving the flue gas from the smoke guide passage 2.1 into the heat exchange passage 3.11. In this case, the upper opening of the heat exchange passage 3.11 is used to connect with the exhaust port in the building.

[0074] In summary, the combustion assembly, heat exchanger 3, and fan assembly 4 together constitute the main components of a gas water heater. Among them, the flue gas channel 2.1 is often a straight cylindrical channel, which can easily lead to low heat exchange efficiency when the combustion heat exchange module is operating as described above.

[0075] Based on this, this embodiment proposes a combustion heat exchange module that can optimize and improve heat exchange efficiency to solve the problem. A gas water heater incorporating this combustion heat exchange module is also proposed.

[0076] For details, see attached. Figure 5 and attached Figure 6 As shown, in this embodiment, a flue gas convergence structure is provided in the flue gas guide channel 2.1, which is configured to guide the flue gas at the side wall of the flue gas guide channel 2.1 to be output from the central area of ​​the flue gas outlet 2.1a to the heat exchange channel 3.11.

[0077] As a form of flue gas convergence structure:

[0078] As attached Figure 5As shown, in the flue gas conveying direction from combustion port 1.11 to heat exchange channel 3.11, the flue gas guide channel 2.1 has a portion with a reduced diameter. The sidewall of this portion includes: extending obliquely to guide the flue gas at the sidewall of the flue gas guide channel 2.1 to the central region of the flue gas outlet 2.1a (as shown in the attached figure). Figure 5 The converging wall 2.11 (indicated by the middle arrow) forms a flue gas converging structure.

[0079] Alternatively, as another form of flue gas convergence structure:

[0080] As attached Figure 6 As shown, the sidewall of the smoke guide duct 2.1 is provided with a protruding converging plate 2.12; the converging plate 2.12 extends at an angle and can guide the flue gas at the sidewall of the smoke guide duct 2.1 to the central area of ​​the smoke outlet 2.1a (as shown in the attached figure). Figure 6 (As indicated by the middle arrow) to form a flue gas concentrating structure. The concentrating plate 2.12 can be a separate plate and fixed to the smoke guide housing 2 by, for example, screws; or, the concentrating plate 2.12 and the smoke guide housing 2 can be formed as one piece.

[0081] In this way, by setting up a flue gas convergence structure, it is equivalent to forming a narrowing structure in the connection between the flue gas guide channel 2.1 and the heat exchange channel 3.11, so that the flue gas in the flue gas guide channel 2.1 can be more concentrated and flow into the heat exchange channel 3.11 more quickly. When the combustion heat exchange module is performing heat exchange (water flows in the heat exchange pipe 3.2, and the generated flue gas exchanges heat with the heat exchange pipe 3.2, causing the heat exchange pipe 3.2 to heat up), not only can the flue gas better perform concentrated heat radiation, quickly and efficiently heating the heat exchange pipe 3.2, but the rapidly flowing flue gas can also better break the boundary layer formed by the previous flue gas on the surface of the heat exchange pipe 3.2, so that the high-temperature flue gas newly input into the heat exchange channel 3.11 can have more sufficient thermal contact with the surface of the heat exchange pipe 3.2, further improving the heat exchange efficiency between the flue gas and the heat exchange pipe 3.2.

[0082] Moreover, as attached Figure 6 As shown, when the flue gas converging structure is composed of a converging plate 2.12, to address the issue of the converging plate 2.12 easily swaying due to the large impact of the flue gas, a connecting arm 2.121 can be provided at one end of the converging plate 2.12 protruding from the side wall of the flue gas guide channel 2.1. The connecting arm 2.121 is fixed to the side wall of the flue gas guide channel 2.1 using a fixing structure such as screws or rivets. This improves the installation stability of the converging plate 2.12, thereby ensuring the stability of the flue gas flow. The connecting arm 2.121 can be integrally formed with the converging plate 2.12, or it can be a separate plate fixed to the converging plate 2.12 using screws or rivets.

[0083] To further enhance the structural strength of the flow-concentrating plate 2.12, several reinforcing ribs can be provided on the flow-concentrating plate 2.12.

[0084] Based on any of the above solutions, considering that gas water heaters often include several electrical components located outside the combustion assembly, when the combustion assembly is working as described above, the high-temperature heat inside the smoke guide shell 2 is prone to overflow. This not only drives the surface temperature of the smoke guide shell 2 to be too high, affecting the service life of the smoke guide shell 2, but also has an adverse effect on the electrical components outside the combustion assembly. In severe cases, it can greatly reduce the service life of the gas water heater.

[0085] Therefore, there is a need to further provide a combustion heat exchange module that can prevent heat leakage from the smoke guide shell 2 and better reduce the surface temperature of the smoke guide shell 2. A gas water heater equipped with this combustion heat exchange module is proposed.

[0086] As an example, see attached Figure 3 and attached Figure 7 As shown, in this embodiment, the combustion component of the combustion heat exchange module also includes a heat-resistant structure formed in the sidewall of the smoke guide channel 2.1.

[0087] Specifically, the heat-insulating structure includes: a heat-insulating cavity 2.2, an air outlet channel 2.4, and an air inlet channel 2.3. More precisely, for example, [the structure includes...]. Figure 3 and attached Figure 7 As shown, the heat-insulating cavity 2.2 is a cavity located in the side wall of the smoke guiding channel 2.1; the air outlet 2.4 is a hole located in the side wall of the heat-insulating cavity 2.2 that is laterally close to the smoke guiding channel 2.1 and connects the heat-insulating cavity 2.2 with the smoke guiding channel 2.1; the air inlet 2.3 can be a hole located in the side wall of the heat-insulating cavity 2.2 that is laterally away from the smoke guiding channel 2.1 or in the bottom wall of the heat-insulating cavity 2.2 and connects the heat-insulating cavity 2.2 with the outside air.

[0088] At this time, when a flame forms in the combustion zone of the smoke guide channel 2.1, it consumes oxygen and fuel gas, and forms high-temperature flue gas that rises directly, creating a low-pressure zone in the smoke guide channel 2.1. At this time, external air enters the heat-insulating cavity 2.2 through the air inlet 2.3, flows through the heat-insulating cavity 2.2, and then flows out through the air outlet 2.4 back into the smoke guide channel 2.1, thus forming a flowing airflow in the heat-insulating cavity 2.2, called the heat-insulating airflow. This heat-insulating airflow forms a wind-cooled heat insulation, which can bring the heat dissipated from the surface of the smoke guide shell 2 outward into the smoke guide channel 2.1. It can not only prevent the heat generated by the flame combustion in the smoke guide shell 2 from overflowing outward, effectively controlling the surface temperature of the combustion device, but also bring the dissipated heat back into the smoke guide channel 2.1 to exchange heat with the heat exchanger 3, improving the overall effective heat output rate of the combustion device. Meanwhile, the aforementioned heat-insulating structure does not require additional complex water pipe structures, has a simpler and easier-to-install structure, and does not require significant costs to address the control of the water cooling circuit and the erosion of the water circuit, thus better avoiding the problems associated with water cooling.

[0089] Furthermore, in this embodiment, as shown in the appendix Figure 7 As shown, the heat-insulating cavity 2.2 is provided with a vertically extending partition plate 2.21, which divides the heat-insulating 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 located between the far-heat flow cavity 2.2b and the smoke guide channel 2.1.

[0090] Meanwhile, the heat-insulating cavity 2.2 has a perforated air outlet 2.4 in the side wall near the smoke guide channel 2.1 in the transverse direction. One end of the air outlet 2.4 is connected to the smoke guide channel 2.1, and the other end is connected to the near-heat flow cavity 2.2a.

[0091] The heat-insulating cavity 2.2 has a perforated air inlet channel 2.3 in the side wall away from the smoke guide channel 2.1 in the lateral direction. One end of the air inlet channel 2.3 is connected to the heat flow cavity 2.2b, and the other end is connected to the external space of the smoke guide shell 2.

[0092] The partition plate 2.21 is provided with a perforated flow channel 2.211, one end of which is open and connected to the near heat flow cavity 2.2a, and the other end is open and connected to the far heat flow cavity 2.2b.

[0093] At this time, when a flame forms in the combustion zone of the smoke guide channel 2.1, it consumes oxygen and fuel gas, and forms high-temperature flue gas that rises directly, creating a low-pressure zone in the smoke guide channel 2.1. At this time, external air enters the far-heat flow chamber 2.2b from the air inlet 2.3, flows into the near-heat flow chamber 2.2a from the overflow 2.211, and then flows out into the smoke guide channel 2.1 from the air outlet 2.4, which is equivalent to forming a multi-layered hot airflow structure, further enhancing the blocking effect of external heat overflow.

[0094] In any of the above schemes, the specific number and height position of the air intake channel 2.3, air outlet channel 2.4, and flow passage 2.211 can be set according to requirements.

[0095] In this embodiment, at least two air inlet channels 2.3 can be provided, which are vertically spaced apart. One air inlet channel 2.3 is connected to the upper region of the heat transfer cavity 2.2b, and the other air inlet channel 2.3 is connected to the lower region of the heat transfer cavity 2.2b. (Vertically, the heat transfer cavity 2.2b is divided into three equal parts, from top to bottom, into an upper region, a middle region, and a lower region.)

[0096] In this way, the heat-insulating structure has two air inlets spaced apart vertically, which can cover a larger air intake area, improve the smoothness and volume of airflow into the heat flow cavity 2.2b during operation, and thus better form the aforementioned heat-insulating airflow to improve the heat blocking effect.

[0097] At this point, at least two vent channels 2.4 can be provided, with the two vent channels 2.4 distributed vertically at intervals; and wherein: one vent channel 2.4 is connected to the upper region of the near-heat flow cavity 2.2a; the other vent channel 2.4 is connected to the lower region of the near-heat flow cavity 2.2a. (In the vertical direction, the near-heat flow cavity 2.2a is divided into three equal parts, from top to bottom, into an upper region, a middle region, and a lower region.)

[0098] In this way, the airflow flowing into the near-heat flow cavity 2.2a is divided into two paths. One path flows upward in the near-heat flow cavity 2.2a and flows into the smoke guide channel 2.1 through an outlet 2.4 at the upper end; the other path flows downward in the near-heat flow cavity 2.2a and flows into the smoke guide channel 2.1 through another outlet 2.4 at the lower end. This creates a larger area of ​​heat-resistant airflow in the near-heat flow cavity 2.2a, improving the heat blocking effect.

[0099] Furthermore, at this point, the flow channel 2.211 can be configured such that one end of its opening connects to the central region of the near-heat flow cavity 2.2a, and the other end connects to the central region of the far-heat flow cavity 2.2b. In this way, while forming a large-area airflow for heat blocking as described above, both airflow paths have relatively short flow paths, allowing each airflow to better and faster carry the heat dissipated to the near-heat flow cavity 2.2a back to the smoke guide channel 2.1, reducing the likelihood of uneven heat blocking and further improving the overall heat blocking effect.

[0100] Furthermore, in the above scheme, it is considered that the intake difficulty of the upper air intake channel 2.3 is higher than that of the lower air intake channel 2.3. In this embodiment, as shown in the attached... Figure 10 As shown, there can be several air intake channels 2.3, divided into a first part and a second part located below the first part. The air intake channels 2.3 in the first part are connected to the upper region of the heat transfer cavity 2.2b; the air intake channels 2.3 in the second part are connected to the lower region of the heat transfer cavity 2.2b. Furthermore, the number of air intake channels 2.3 in the first part is greater than the number of air intake channels 2.3 in the second part.

[0101] Furthermore, considering that heat tends to accumulate in the corners of the cavity far from the central area of ​​the smoke guide channel 2.1, in this embodiment, as shown in the attached... Figure 10 As shown, the first part of the air intake channels 2.3 are distributed at intervals in the horizontal direction, and the further away from the center area of ​​the smoke guide channel 2.1, the smaller the interval between adjacent air intake channels 2.3; in this way, more air intake channels 2.3 can be set at the corners far from the center area of ​​the smoke guide channel 2.1, so as to better and more evenly block the overflowing heat over the entire area.

[0102] In this embodiment, as shown in the appendix Figure 8 As shown, the smoke guide shell 2 can be composed of an inner shell with a smoke guide channel 2.1 inside, and an outer shell plate 2b disposed outside the inner shell. A heat-insulating cavity 2.2 is formed between the inner shell and the outer shell plate 2b at intervals. An air inlet channel 2.3 is disposed on the outer shell plate 2b, and an air outlet channel 2.4 is disposed on the inner shell.

[0103] The inner shell 2a includes a first inner plate 2a.1 and a second inner plate 2a.2. The first inner plate 2a.1 and the second inner plate 2a.2 are detachably connected by means of, for example, screws, to surround the smoke guide channel 2.1, thereby forming the inner shell. The outer shell plate 2b is preferably detachably fixed to the inner shell by means of, for example, screws. When a partition plate 2.21 is provided, the partition plate 2.21 is placed between the inner shell and the outer shell plate 2b, and is preferably detachably fixed to either the inner shell or the outer shell plate 2b by means of, for example, screws.

[0104] The sidewall of the heat-insulating cavity 2.2 may be provided with a protrusion extending into the heat-insulating cavity 2.2. For example, see attached... Figure 8 As shown, the inner shell can be formed with a first protrusion 2a.3 located in the heat-insulating cavity 2.2; the outer shell plate 2b can also be formed with a second protrusion 2b.1 located in the heat-insulating cavity 2.2; this increases the contact area between the heat-insulating airflow and the smoke-guiding shell 2, allowing the heat-insulating airflow to carry more heat back to the smoke-guiding channel 2.1. The first protrusion 2a.3 and the second protrusion 2b.1 are preferably vertically extending ridges, which can reduce obstruction of the heat-insulating airflow while dividing the heat-insulating airflow into zones, optimizing the smoothness of the heat-insulating airflow. (See attached...) Figure 10 As shown, several protrusions can be distributed at intervals in the horizontal direction, and the further away from the central area of ​​the smoke guide channel 2.1, the larger the interval between adjacent protrusions.

[0105] Furthermore, based on the above plan, as shown in the appendix... Figure 9 As shown, a guide section 2.6 protruding into the smoke guide channel 2.1 can also be provided on the side wall of the smoke guide channel 2.1.

[0106] Specifically, the guide section 2.6 has a hollow interior and communicates with the near-hot flow cavity 2.2a; and the outer wall of the guide section 2.6 (i.e., the side wall of the protruding outer surface of the guide section 2.6 for contacting the airflow in the smoke guide channel 2.1) includes: a guide wall 2.61 facing the combustion port 1.11 (i.e., the airflow flowing towards the airflow after being output from the combustion port 1.11), a backflow wall 2.63 facing away from the combustion port 1.11 (i.e., the airflow flowing away from the airflow after being output from the combustion port 1.11), and a connecting wall 2.62 extending vertically (either vertically or in an arc shape) and connecting the guide 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 guide wall 2.61, so as to connect the guide wall 2.61 and the backflow wall 2.63. For example, see attached... Figure 7 As shown, the outer wall of the flow guide 2.6 includes: a flow guide wall 2.61 facing downward, a back flow wall 2.63 facing upward, and a connecting wall 2.62 extending in an arc shape in the vertical direction.

[0107] The guide wall 2.61 is inclined to guide the airflow flowing upward from the side wall of the smoke guide channel 2.1 to the center of the smoke guide channel 2.1 (the area where the axis of the smoke guide channel 2.1 is located). This allows for better concentration of airflow (air, fuel gas, and high-temperature flue gas) at the center of the smoke guide channel 2.1, improving combustion efficiency and heat concentration, thus facilitating better heat accumulation and output for subsequent heat utilization. Simultaneously, it drives the airflow away from the side wall of the smoke guide channel 2.1, further reducing the outward transfer of heat.

[0108] In this case, as a method, the air outlet 2.4 can be set on the back flow wall 2.63.

[0109] Alternatively, as another approach, the exhaust duct 2.4 is disposed on the connecting wall 2.62; and the exhaust duct 2.4 is preferably inclined so that the airflow in the heat-insulating cavity 2.2, after flowing out of the exhaust duct 2.4, can be conveyed obliquely upward. This achieves the following: the airflow flowing from the exhaust duct 2.4 into the smoke guide channel 2.1 can better conform to the flow of rising flue gas in the smoke guide channel 2.1, reducing unwanted airflow impact, while improving the smoothness and stability of the rising flow of flue gas and the rising flow of the heat-insulating airflow, thereby improving the heat output stability of the combustion assembly while optimizing the blocking effect of overflowing heat.

[0110] Regardless of the method described above, the airflow generated by combustion in the smoke guide channel 2.1 is unlikely to cause unwanted obstruction to the airflow in the heat-insulating cavity 2.2, so that the heat-insulating airflow that blocks heat can always be smoothly formed in the heat-insulating cavity 2.2 as described above.

[0111] Furthermore, when the air outlet 2.4 is located on the connecting wall 2.62, the guiding effect of the flow guide wall 2.61 on the airflow will cause the diameter of the smoke guide channel 2.1 at the connecting wall 2.62 to shrink, resulting in increased flow velocity and decreased fluid pressure in this area. This will better attract the airflow in the heat insulation cavity 2.2, further improving the smoothness of the formation and flow of the heat insulation airflow (the airflow from the external air inlet 2.3 into the heat insulation cavity 2.2 and then out through the air outlet 2.4 into the smoke guide channel 2.1), thereby improving the overall blocking effect on the overflowing heat and better reducing the surface temperature of the smoke guide shell 2.

[0112] For the arrangement of two air outlet channels 2.4, a guide section 2.6 can be provided for each air outlet channel 2.4, and each air outlet channel 2.4 is disposed in the back flow wall 2.63 or connecting wall 2.62 of the guide section 2.6.

[0113] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. Furthermore, the terms "vertical," "horizontal," "front," and "rear," etc., mentioned in the embodiments of the present utility model, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. It should be further noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" in the description should be interpreted broadly. 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model according to the specific circumstances.

[0114] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A combustion heat exchange module, characterized in that, include: A burner (1) having a combustion port (1.11) for discharging flue gas; A heat exchanger (3) includes a heat exchange housing (3.1) and heat exchange pipes (3.2), the heat exchange housing (3.1) having heat exchange channels (3.11) for accommodating part of the heat exchange pipes (3.2); The smoke guide housing (2) has a smoke guide channel (2.1) for conveying the flue gas from the combustion port (1.11) to the heat exchange channel (3.11), the smoke guide channel (2.1) having a smoke outlet (2.1a) connected to the heat exchange channel (3.11); The smoke guide channel (2.1) is provided with a flue gas convergence structure, which is configured to guide the flue gas at the side wall of the smoke guide channel (2.1) from the central area of ​​the smoke outlet (2.1a) to the heat exchange channel (3.11).

2. The combustion heat exchange module according to claim 1, characterized in that: In the flue gas conveying direction from the combustion port (1.11) to the heat exchange channel (3.11), the flue gas guide channel (2.1) has a portion with a reduced diameter, and the sidewall of this portion includes: an inclined extension to guide the flue gas at the sidewall of the flue gas guide channel (2.1) to the central region of the flue gas outlet (2.1a); The gas converging wall (2.11) has the aforementioned flue gas converging structure.

3. The combustion heat exchange module according to claim 1, characterized in that: The sidewall of the smoke guide channel (2.1) is provided with a flow-gathering plate (2.12) protruding into the smoke guide channel (2.1); The converging plate (2.12) extends at an angle and can guide the flue gas at the side wall of the smoke guide channel (2.1) to the central area of ​​the smoke outlet (2.1a) to form the flue gas converging structure.

4. The combustion heat exchange module according to claim 3, characterized in that: The flow-gathering plate (2.12) is provided with a connecting arm (2.121) at one end protruding from the side wall of the smoke guide channel (2.1); The connecting arm (2.121) is fixed to the side wall of the smoke guide channel (2.1).

5. The combustion heat exchange module according to any one of claims 1 to 4, characterized in that: A heat-resistant structure is formed in the sidewall of the smoke guiding channel (2.1), the heat-resistant structure comprising: A heat-insulating cavity (2.2) is disposed in the side wall of the smoke guiding channel (2.1); An air outlet (2.4) is provided to connect the heat-insulating cavity (2.2) with the smoke guiding channel (2.1); An air inlet channel (2.3) is provided to connect the heat-insulating cavity (2.2) with the external space of the smoke guide shell (2).

6. The combustion heat exchange module according to claim 5, characterized in that: The heat-insulating cavity (2.2) is provided with a partition plate (2.21), which divides the heat-insulating cavity (2.2) into: a near-heat flow cavity (2.2a) connected to the air outlet channel (2.4), and a far-heat flow cavity (2.2b) connected to the air inlet channel (2.3); The near-heat flow cavity (2.2a) is positioned between the far-heat flow cavity (2.2b) and the smoke guide channel (2.1); The partition plate (2.21) is provided with a flow channel (2.211) for connecting the near-heat flow cavity (2.2a) and the far-heat flow cavity (2.2b).

7. The combustion heat exchange module according to claim 6, characterized in that: At least two air intake channels (2.3) are provided, and the two air intake channels (2.3) are distributed vertically at intervals, wherein: One of the air inlet channels (2.3) is connected to the upper region of the heat flow cavity (2.2b); Another air inlet (2.3) is connected to the lower region of the heat flow cavity (2.2b).

8. The combustion heat exchange module according to claim 6, characterized in that: The air intake channel (2.3) has several parts and is divided into a first part and a second part located below the first part, wherein: The air inlet channel (2.3) in the first part is connected to the upper region of the heat flow cavity (2.2b); The air inlet channel (2.3) in the second part is connected to the lower end region of the heat flow cavity (2.2b); Furthermore, the number of air intake channels (2.3) in the first part is greater than the number of air intake channels (2.3) in the second part.

9. The combustion heat exchange module according to claim 8, characterized in that: The air intake channels (2.3) in the first part are spaced apart in the horizontal direction, and the further away from the center area of ​​the smoke guide channel (2.1), the smaller the interval between adjacent air intake channels (2.3).

10. The combustion heat exchange module according to claim 7, characterized in that: At least two air outlet channels (2.4) are provided, and the two air outlet channels (2.4) are distributed vertically at intervals, wherein: One of the air outlet channels (2.4) is connected to the upper region of the near-heat flow cavity (2.2a); Another of the vent channels (2.4) is connected to the lower region of the near-heat flow cavity (2.2a).

11. The combustion heat exchange module according to claim 10, characterized in that: The flow channel (2.211) is configured such that one end of it is connected to the central region of the near-heat flow cavity (2.2a), and the other end is connected to the central region of the far-heat flow cavity (2.2b).

12. The combustion heat exchange module according to claim 5, characterized in that: The sidewall of the heat-insulating cavity (2.2) is provided with a protrusion that protrudes into the heat-insulating cavity (2.2); The protrusions are distributed at intervals in the horizontal direction, and the further away from the center region of the smoke guide channel (2.1), the greater the interval between adjacent protrusions.

13. A gas water heater, characterized in that: It includes the combustion heat exchange module as described in any one of claims 1 to 12.

Images