Fin, combustion heat exchange assembly with fin and gas water heater

Abstract

The utility model relates to the technical field of household appliances, in particular to a fin, a combustion heat exchange assembly with the fin and a gas water heater, and the fin comprises a fin body, at least two pipe insertion holes are formed in the fin body, heat exchange pipelines can be inserted into the pipe insertion holes, and the pipe insertion holes are arranged at intervals in the transverse direction; one side face of the fin body is provided with a protruding smoke blocking structure, the smoke blocking structure is arranged in the middle area of the two pipe inserting holes, and smoke flowing from bottom to top is guided to the pipe inserting holes in the two sides of the smoke blocking structure. The smoke blocking structure at least comprises a first smoke blocking part, a second smoke blocking part and a third smoke blocking part which are sequentially arranged at intervals from bottom to top; in the direction from bottom to top, the width sizes of the first smoke blocking part, the second smoke blocking part and the third smoke blocking part are gradually increased. Therefore, the fin capable of improving the heat exchange effect is formed.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and more specifically to fins, combustion heat exchange components having the fins, and gas water heaters. Background Technology

[0002] A gas water heater is a household appliance that uses the combustion of gas to generate heat to heat cold water.

[0003] Existing gas water heaters mainly consist of: a combustion heat exchange assembly for heating cold water (including a combustion assembly for forming a high-temperature flame and a heat exchanger with water pipes for transferring high temperature to the cold water in the pipes), a fan assembly for promoting air circulation, and other piping and electrical components. To improve the heat exchange effect and efficiency of the combustion heat exchange assembly, existing fins are often incorporated to contact the hot airflow and transfer heat to the water pipes; however, the heat exchange effect of these fins still needs improvement. Utility Model Content

[0004] One of the purposes of this invention is to address the shortcomings of existing technologies by providing fins that can improve heat exchange efficiency.

[0005] The second objective of this utility model is to provide a combustion heat exchange assembly having the aforementioned fins.

[0006] The third objective of this utility model is to provide a gas water heater having the aforementioned fins or combustion heat exchange components.

[0007] The technical solution of this utility model is as follows:

[0008] Fins, including:

[0009] The fin body is provided with insertion holes for inserting heat exchange pipes, and there are at least two insertion holes arranged at intervals in the transverse direction.

[0010] One side of the fin body has a raised smoke-blocking structure, which is placed in the middle area of ​​the two insertion holes and drives the flue gas flowing from bottom to top to flow to the insertion holes on both sides.

[0011] The smoke-blocking structure includes: a first smoke-blocking part, a second smoke-blocking part, and a third smoke-blocking part arranged sequentially from bottom to top;

[0012] From bottom to top, the width of the first smoke-blocking part, the second smoke-blocking part, and the third smoke-blocking part gradually increases.

[0013] In some designs, the first smoke-blocking part is configured vertically as being below the center of the two insertion holes.

[0014] In some designs, the third smoke-blocking section is configured vertically as being higher than the two insertion holes;

[0015] Furthermore, the lower end face of the third smoke-blocking part is an arc-shaped surface that bulges downward in the middle.

[0016] In some designs, the second smoke-blocking part includes:

[0017] A first guide plate extending at an angle is configured to guide flue gas flowing from bottom to top to the upper end of an insertion port;

[0018] A second guide plate extending at an angle is configured to guide the flue gas flowing from bottom to top to the upper end of another insertion port;

[0019] Furthermore, the lower end of the first guide plate is close to or connected to the lower end of the second guide plate.

[0020] In some designs, one side of the fin body is provided with several flow-blocking pillars arranged around the upper half of the insertion hole.

[0021] In some designs, the wall of the insertion port extends by forming a raised extension wall on one side of the fin body.

[0022] In some designs, the extension wall and the smoke-blocking structure are located on the same side of the fin body, and the protrusion height of the extension wall is greater than that of the smoke-blocking structure.

[0023] Furthermore, the outer edge of the protruding end of the extension wall is provided with several support ends that extend toward the outer periphery of the insertion hole.

[0024] Combustion heat exchange components, including:

[0025] A burner used to generate a flame, the burner having a combustion port for the flame to be ejected outward;

[0026] A heat exchanger positioned above a burner includes a heat exchange housing and heat exchange pipes, the heat exchange housing having a heat exchange channel, and the heat exchange pipes having a portion disposed within the heat exchange channel.

[0027] The fin described in any of the above embodiments is placed in a heat exchange channel, and the heat exchange pipe has a portion inserted into the insertion hole of the fin and in contact with the fin;

[0028] The smoke guide shell has a smoke guide channel that is connected to the combustion port and discharges the flue gas generated by combustion upward into the heat exchange channel.

[0029] In some designs, a heat-resistant structure is formed in the sidewall of the smoke guide channel, and the heat-resistant structure includes:

[0030] A heat-insulating cavity is installed in the side wall of the smoke guide channel;

[0031] An air outlet is provided to connect the heat-insulating cavity and the smoke guiding channel;

[0032] An air inlet channel that connects the heat-insulating cavity to the outside air.

[0033] A gas water heater comprising the fins described in any of the above embodiments, or comprising the combustion heat exchange component described in any of the above embodiments.

[0034] The main beneficial effects of the above technical solution are as follows:

[0035] 1. By setting up a smoke-blocking structure, the contact area of ​​the fins with the hot airflow can be increased, the airflow velocity can be reduced to prolong the contact time between the airflow and the fins, thereby improving the heat exchange effect and forming a high-efficiency heat exchange structure.

[0036] 2. By setting up a smoke-blocking structure, the airflow can be directed towards the insertion hole of the heat exchange pipe, allowing the hot airflow to heat the heat exchange pipe better and faster. Moreover, the smoke-blocking structure is composed of smoke-blocking parts arranged at intervals in the vertical direction, forming a flow guiding structure while ensuring that the fins have sufficient airflow space, preventing excessive obstruction of airflow. This improves the heat exchange effect while better ensuring the smoothness of airflow.

[0037] 3. The first, second, and third smoke-blocking sections together form an inverted triangle-shaped flow-guiding structure. When the flue gas flowing from bottom to top impacts the smoke-blocking structure, it not only slows down the flow velocity but also splits the airflow into two streams: one closer to the left insertion hole and the other closer to the right insertion hole. This achieves the following: When heat exchange pipes are inserted into the insertion holes of the fins, the high-temperature flue gas can be better driven towards the heat exchange pipes, thereby improving the heat exchange effect.

[0038] 4. By setting the specific location of the smoke blocking section, the smoothness of airflow can be further improved and the possibility of eddy formation can be reduced.

[0039] Further or more detailed beneficial effects will be described in conjunction with specific embodiments in the detailed implementation. Attached Figure Description

[0040] The present invention will be further described below with reference to the accompanying drawings:

[0041] Figure 1 This is a schematic diagram of the internal structure of a gas water heater.

[0042] Figure 2 A schematic diagram of the combustion assembly installation structure.

[0043] Figure 3 This is a cross-sectional schematic diagram of the combustion assembly.

[0044] Figure 4 This is a schematic diagram of a heat exchanger.

[0045] Figure 5 This is a schematic diagram of the fin structure.

[0046] Figure 6 This is a frontal view of the fins.

[0047] Figure 7 This is an enlarged schematic diagram of the air outlet and air inlet.

[0048] Figure 8 This is a schematic diagram of the airflow for heat dissipation.

[0049] Figure 9 This is a schematic diagram of an installation structure for a smoke guide shell. Detailed Implementation

[0050] The present invention will be illustrated with specific examples below:

[0051] Example:

[0052] Gas water heater, as attached Figure 1 As shown, it mainly includes a water heater casing, and a combustion heat exchange assembly and a fan assembly 4 placed inside the water heater casing. The combustion heat exchange assembly includes a combustion component for forming a high-temperature flame, and a heat exchanger 3 with water pipes for transferring high temperature to cold water in the water pipes. The fan assembly 4 is used to form a directional airflow in the combustion heat exchange assembly.

[0053] 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.

[0054] 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).

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 close 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.

[0059] 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.

[0060] 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.

[0061] To be precise, as shown in the appendix Figure 4 As illustrated 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, for example, by screws, or 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 3As 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.

[0062] 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.

[0063] The heat exchange channel 3.11 may also be provided with several fins 3.3 (fins 3.3 are sheet-like structures made of materials with good thermal conductivity such as steel strip, stainless steel strip, copper strip, and aluminum strip). The 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] In summary, the combustion assembly, heat exchanger 3, and fan assembly 4 together constitute the main components of a gas water heater.

[0068] To improve heat exchange efficiency, the structure of fin 3.3 needs to be modified. Therefore, this application provides fins that can improve heat exchange efficiency; and a combustion heat exchange assembly and a gas water heater having the fins.

[0069] For details, see attached. Figure 5 As shown, in this embodiment, the fin 3.3 includes a fin body 3.31, which is provided with insertion holes 3.32 for inserting the heat exchange pipe 3.2. There are at least two insertion holes 3.32, which are spaced apart laterally. When the fin 3.3 is installed in the heat exchange channel 3.11, the heat exchange pipe 3.2 extends in a curved manner and passes through several insertion holes 3.32 in sequence. The inserted part of the heat exchange pipe 3.2 is in contact with the fin 3.3 so that the heat obtained by the heat transfer between the fin 3.3 and the high-temperature flue gas can be transferred to the heat exchange pipe 3.2 to heat the heat exchange pipe 3.2.

[0070] As attached Figure 5 As shown, one side of the fin body 3.31 has a raised smoke-blocking structure. This smoke-blocking structure is located in the middle area of ​​the two insertion holes 3.32 and drives the flue gas flowing from bottom to top to flow into the insertion holes 3.32 on both sides. This achieves the following: By setting the smoke-blocking structure, not only is the contact area of ​​the fin 3.3 for contact with the hot airflow increased, and the airflow velocity is slowed down to prolong the contact time between the airflow and the fin 3.3, thereby improving the heat exchange effect; it also drives the airflow to flow into the insertion holes 3.32 where the heat exchange pipes 3.2 are inserted, so that the hot airflow can heat the heat exchange pipes 3.2 better and faster.

[0071] Furthermore, in this embodiment, the smoke-blocking structure includes a first smoke-blocking portion 3.34, a second smoke-blocking portion 3.35, and a third smoke-blocking portion 3.36 arranged sequentially from bottom to top. And, in the bottom-to-top direction, the width dimensions of the first smoke-blocking portion 3.34, the second smoke-blocking portion 3.35, and the third smoke-blocking portion 3.36 (as shown in the attached figure)... Figure 5 In the middle, the spacing between the two ends of the smoke-blocking section in the left-right direction gradually increases. That is, as shown in the attached figure... Figure 6 As shown, the width dimension d1 of the first smoke-blocking part 3.34 is smaller than the width dimension d2 of the second smoke-blocking part 3.35, and the width dimension d2 of the second smoke-blocking part 3.35 is smaller than the width dimension d3 of the third smoke-blocking part 3.36.

[0072] At this point, the first smoke-blocking section 3.34, the second smoke-blocking section 3.35, and the third smoke-blocking section 3.36 together form an inverted triangle-shaped flow-guiding structure. When the flue gas flowing from bottom to top impacts the smoke-blocking structure, it not only slows down the flow velocity but also splits the airflow into two streams: one near the left insertion hole 3.32 and the other near the right insertion hole 3.32. This achieves the following: when a heat exchange pipe 3.2 is inserted into the insertion hole 3.32 of the fin 3.3, it can better drive the high-temperature flue gas towards the heat exchange pipe 3.2, thereby improving the heat exchange effect.

[0073] Moreover, the smoke-blocking structure in this embodiment consists of three vertically spaced smoke-blocking sections, with sufficient space between them for airflow to avoid excessive airflow blockage. This improves heat exchange efficiency while optimizing the smoothness of airflow.

[0074] In the vertical direction (attached) Figure 5 In the vertical direction, the first smoke-blocking part 3.34 can be configured such that it is lower than the center of the two insertion holes 3.32 (the center of the insertion hole; when the insertion hole is circular, its center position is the center of the circle). That is, as shown in the attached figure. Figure 6 The first smoke-blocking part 3.34 is lower than the center of both the left and right insertion holes 3.32. This achieves the following: the first smoke-blocking part 3.34 can better drive the airflow from bottom to top to the insertion holes 3.32 on both sides; and the airflow can have more space to flow smoothly upwards.

[0075] Furthermore, in the vertical direction (attached) Figure 5 In the vertical direction, the third smoke-blocking section 3.36 is configured to be higher than both the left and right insertion holes 3.32; that is, the third smoke-blocking section 3.36 is higher than both its left and right insertion holes 3.32. This allows the third smoke-blocking section 3.36 to create a greater flow-blocking effect at a higher position, better slowing the airflow in the area where the insertion holes 3.32 are located on the fins 3.3, prolonging the time that the airflow can have thermal contact with the fins 3.3, and improving the heat exchange effect. Furthermore, the lower end face of the third smoke-blocking section 3.36 is an arc-shaped surface that convexes downwards in the middle; this optimizes the smoothness of airflow and reduces the possibility of eddies.

[0076] Furthermore, as shown in the appendix Figure 5 As shown, the second smoke-blocking part 3.35 includes: a first guide plate 3.351 extending at an angle (e.g., attached to...). Figure 5 In the middle, it extends at an angle with the left side higher than the right side, and is configured to guide the flue gas flowing from bottom to top to the upper end of an insertion port 3.32.

[0077] The second smoke-blocking part 3.35 also includes a second guide plate 3.352 extending at an angle (e.g., attached). Figure 5(Extending at an angle, higher on the right and lower on the left), it is configured to guide the flue gas flowing from bottom to top to the upper end of another insertion port 3.32. And the lower end of the first guide plate 3.351 is close to or connected to the lower end of the second guide plate 3.352.

[0078] In this way, the airflow can be better guided to the upper end of the insertion hole 3.32, which is not easy to come into contact with the hot airflow; especially when the heat exchange pipe 3.2 is inserted into the insertion hole 3.32, the above-mentioned second smoke blocking part 3.35 can better guide the flue gas to the black side of the heat exchange pipe 3.2 (i.e. the upper end of the heat exchange pipe 3.2 facing away from the airflow), so as to improve the heat exchange effect.

[0079] Similarly, as shown in the appendix Figure 5 As shown, one side of the fin body 3.31 may also be provided with a plurality of flow-blocking pillars 3.33 arranged around the upper half of the insertion hole 3.32. In this embodiment, the flow-blocking pillars 3.33 and the smoke-blocking structure are arranged on the same side of the fin body 3.31.

[0080] To increase the contact area with the heat exchange pipe 3.2, the wall of the insertion hole 3.32 may also extend to include a raised extension wall 3.321 on one side of the fin body 3.31.

[0081] At this point, the extension wall 3.321 and the smoke-blocking structure are preferably located on the same side of the fin body 3.31, and the protrusion height of the extension wall 3.321 is greater than the protrusion height of the smoke-blocking structure. Furthermore, the outer edge of the protruding end of the extension wall 3.321 is provided with several support ends 3.322 extending towards the outer periphery of the insertion hole 3.32. Thus, when multiple fins 3.3 are stacked, the support ends 3.322, acting as a support structure, will protect the smoke-blocking structure, ensuring that the smoke-blocking structure can stably and smoothly change the airflow as required, as described above.

[0082] The first smoke-blocking part 3.34, the second smoke-blocking part 3.35, the third smoke-blocking part 3.36 and the flow-blocking column 3.33 are preferably formed by flanging or pressurizing the fin body 3.31 to form the above structure while avoiding excessive increase in the overall weight of the fin 3.3.

[0083] Based on the above, as shown in the appendix Figure 5 As shown, the fin body 3.31 can also be provided with an overflow hole 3.38 located above the insertion hole 3.32 to improve the overall airflow smoothness. Furthermore, the upper end of the overflow hole 3.38 can also be provided with a baffle portion 3.37 protruding on the fin body 3.31 to block the airflow flowing upward from the overflow hole 3.38, better preventing excessive airflow from overflowing from the overflow hole 3.38, thereby extending the overall heat contact time between the airflow and the fin 3.3 and improving the heat exchange effect.

[0084] For the gas water heater mentioned above, it also includes several electrical components installed outside the combustion assembly. When the combustion assembly is working as described above, the high temperature heat inside the smoke guide shell 2 is easy to escape. 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 will greatly reduce the service life of the gas water heater.

[0085] Therefore, it is also necessary to develop a combustion heat exchange component 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 component is proposed.

[0086] As one approach, a water-cooling structure can be provided on the outer surface of the smoke guide shell 2 to solve the above problems. However, setting up a water-cooling structure often requires a complex piping structure, resulting in complex piping structures and installation difficulties for the combustion assembly; moreover, in order to better prevent water leakage and water corrosion, the water-cooled piping structure often requires a large cost.

[0087] To address the aforementioned issues while simplifying the structure and reducing costs, this application proposes a combustion heat exchange component that can prevent heat loss without water and better avoid water cooling problems. A gas water heater incorporating this combustion heat exchange component is also proposed.

[0088] As an example, see attached Figure 3 and attached Figure 7 As shown, the combustion heat exchange assembly in this embodiment also includes a heat-resistant structure formed in the sidewall of the smoke guide channel 2.1.

[0089] 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 is 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 and connects the heat-insulating cavity 2.2 with the outside air, and the air inlet 2.3 is connected to the heat-insulating cavity 2.2.

[0090] At this time, when a flame forms in the combustion zone of the smoke guide duct 2.1, it consumes oxygen and fuel gas, and forms directly rising high-temperature flue gas, creating a low-pressure zone in the smoke guide duct 2.1. Meanwhile, external air enters the heat-insulating cavity 2.2 through the air inlet duct 2.3, flows through the heat-insulating cavity 2.2, and then flows out through the air outlet duct 2.4 back into the smoke guide duct 2.1, thus creating a flowing airflow in the heat-insulating cavity 2.2 (as shown in the attached diagram). Figure 8 (As indicated by the middle arrow) This is 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 through the smoke guide channel 2.1 back into the smoke guide channel 2.1. It not only prevents the heat generated by the flame combustion in the smoke guide shell 2 from escaping outward, effectively controlling the surface temperature of the combustion component, but also brings the dissipated heat back into the smoke guide channel 2.1 for heat exchange with the heat exchanger 3, improving the overall effective heat output rate of the combustion component. At the same time, the above-mentioned 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 deal with the control of the water cooling circuit and the problem of water corrosion, thus better avoiding the problems associated with water cooling.

[0091] The specific locations of the air outlet 2.4 and the air inlet 2.3 can be set according to requirements. In this embodiment, as shown in the attached figure... Figure 3 and attached Figure 7 As shown, the air inlet duct 2.3 is connected to the upper region of the heat-insulating cavity 2.2 (vertically, the heat-insulating cavity 2.2 is divided into three equal parts, from top to bottom: an upper region, a middle region, and a lower region). Simultaneously, the air outlet duct 2.4 is preferably connected to the lower region of the heat-insulating cavity 2.2, allowing airflow to flow from the upper region into the heat-insulating cavity 2.2 and out through the lower region. This creates a larger airflow area within the heat-insulating cavity 2.2, resulting in a larger heat-blocking area and improved heat rejection.

[0092] Furthermore, as shown in the appendix Figure 3 and attached Figure 7 As shown, the end of the air outlet 2.4 furthest from the heat-insulating cavity 2.2 can be aligned with the combustion zone so that the airflow output from the air outlet 2.4 can be delivered to the combustion zone of the smoke guide channel 2.1. In this way, the air with a certain amount of heat in the heat-insulating cavity 2.2 can participate more effectively in the combustion of the combustion assembly, thereby improving the overall combustion efficiency and combustion effect of the combustion assembly.

[0093] In the above plan, as shown in the appendix Figure 3As shown, the air intake duct 2.3 can be located on the side wall of the heat-insulating cavity 2.2 facing away from the smoke guide channel 2.1 (i.e., the side wall of the heat-insulating cavity 2.2 is laterally away from the smoke guide channel 2.1), so as to have a more spacious area for external air to flow into the air intake duct 2.3, thereby improving the smoothness of airflow and enhancing the heat blocking effect. At this time, as shown in the attached... Figure 7 As shown, the side wall of the heat-insulating cavity 2.2 facing away from the smoke guide channel 2.1 may also be provided with a protruding flow guide 2.5 into the heat-insulating cavity 2.2. The flow guide 2.5 is inclined so as to guide the airflow entering the heat-insulating cavity 2.2 from the air inlet channel 2.3 to flow upward and then downward, so as to further increase the flow area of ​​the airflow in the heat-insulating cavity 2.2 and increase the heat blocking area.

[0094] In some designs, for the side wall of the heat-insulating cavity 2.2 located between the smoke guide channel 2.1 and the heat-insulating cavity 2.2, a plurality of heat-drawing parts 2.24 protruding into the heat-insulating cavity 2.2 can be provided. This can increase the contact area between the airflow and the side wall of the smoke guide channel 2.1, thereby improving the heat exchange efficiency between the airflow and the side wall of the smoke guide channel 2.1, so that the airflow flowing through the heat-insulating cavity 2.2 can carry an equal amount of heat back to the smoke guide channel 2.1.

[0095] To improve the overall heat blocking effect, multiple heat-blocking structures as described above can be arranged around the smoke guide channel 2.1, and the heat-blocking cavities 2.2 in each heat-blocking structure are interconnected to form an annular cavity around the outer periphery of the smoke guide channel 2.1, which blocks the heat in the smoke guide shell 2 from overflowing outward in a 360-degree manner.

[0096] At this time, as attached Figure 9 As shown, the smoke guide housing 2 mainly consists of an inner housing 2a with an internal smoke guide channel 2.1, and an outer housing surrounding the inner housing 2a. A heat-insulating cavity 2.2 is formed between the inner housing 2a and the outer housing at intervals. The outer housing includes a first outer plate 2b.1 and a second outer plate 2b.2, which are detachably connected by, for example, screws to form the outer housing. Preferably, both the first outer plate 2b.1 and the second outer plate 2b.2 are detachably fixed to the inner housing 2a by, for example, screws. An exhaust duct 2.4 is provided in the inner housing 2a, and an intake duct 2.3 is provided in the outer housing.

[0097] 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.

[0098] 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 fin, characterized in that, include: The fin body (3.31) is provided with insertion holes (3.32) for inserting heat exchange pipes (3.2), said insertion holes (3.32) being at least two and spaced apart in the transverse direction; One side of the fin body (3.31) has a raised smoke-blocking structure, which is placed in the middle area of ​​the two insertion holes (3.32) and drives the flue gas flowing from bottom to top to flow to the insertion holes (3.32) on both sides. The smoke-blocking structure includes: a first smoke-blocking part (3.34), a second smoke-blocking part (3.35), and a third smoke-blocking part (3.36) arranged sequentially from bottom to top; In the direction from bottom to top, the width of the first smoke-blocking part (3.34), the second smoke-blocking part (3.35), and the third smoke-blocking part (3.36) gradually increases.

2. The fin according to claim 1, characterized in that: In the vertical direction, the first smoke-blocking part (3.34) is configured to be lower than the center of the two insertion holes (3.32).

3. The fin according to claim 2, characterized in that: In the vertical direction, the third smoke-blocking part (3.36) is configured to be higher than the two insertion holes (3.32); Furthermore, the lower end face of the third smoke-blocking part (3.36) is an arc-shaped surface that bulges downward in the middle.

4. The fin according to claim 3, characterized in that: The second smoke-blocking part (3.35) includes: A first guide plate (3.351) extending at an angle is configured to guide flue gas flowing from bottom to top to the upper end of one of the insertion holes (3.32); A second guide plate (3.352) extending at an angle is configured to guide the flue gas flowing from bottom to top to the upper end of another insertion port (3.32); Furthermore, the lower end of the first guide plate (3.351) is close to or connected to the lower end of the second guide plate (3.352).

5. The fin according to any one of claims 1 to 4, characterized in that: One side of the fin body (3.31) is provided with a plurality of flow-blocking pillars (3.33) arranged around the upper half of the insertion hole (3.32).

6. The fin according to any one of claims 1 to 4, characterized in that: The wall of the insertion hole (3.32) extends with an extension wall (3.321) that protrudes from one side of the fin body (3.31).

7. The fin according to claim 6, characterized in that: The extension wall (3.321) and the smoke-blocking structure are disposed on the same side of the fin body (3.31), and the protrusion height of the extension wall (3.321) is greater than the protrusion height of the smoke-blocking structure; Furthermore, the outer edge of the protruding end of the extension wall (3.321) is provided with a plurality of support ends (3.322) extending in the direction of the outer periphery of the insertion hole (3.32).

8. A combustion heat exchange assembly, characterized in that, include: A burner (1) for forming a flame, the burner (1) having a combustion port (1.11) for the flame to be ejected outward; A heat exchanger (3) positioned above the burner (1) includes a heat exchange housing (3.1) and a heat exchange pipe (3.2), wherein the heat exchange housing (3.1) has a heat exchange channel (3.11) and the heat exchange pipe (3.2) has a portion disposed within the heat exchange channel (3.11); The fin (3.3) according to any one of claims 1 to 7, wherein the fin (3.3) is placed in the heat exchange channel (3.11), and the heat exchange pipe (3.2) has a portion inserted into the insertion hole (3.32) of the fin (3.3) and in contact with the fin (3.3); The smoke guide shell (2) has a smoke guide channel (2.1) that is connected to the combustion port (1.11) and discharges the flue gas generated by combustion upward to the heat exchange channel (3.11).

9. The combustion heat exchange assembly according to claim 8, 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 (2.3) is provided to connect the heat-insulating cavity (2.2) to the outside air.

10. A gas-fired water heater, characterized in that: It comprises the fins as described in any one of claims 1 to 7, or the combustion heat exchange assembly as described in any one of claims 8 to 9.

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