Flue and gas water heating apparatus
By setting side and end exhaust holes on the exhaust pipe and using guide components to guide the flue gas, the problem of high exhaust resistance is solved, and the smoothness of exhaust and wind resistance are improved, while maintaining the compactness and convenience of the exhaust pipe.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG VANWARD NEW ELECTRIC CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-06-12
Smart Images
Figure CN224353277U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot water equipment technology, and in particular to a flue pipe and a gas-fired hot water device. Background Technology
[0002] The balanced flue gas water heater features a double-layer flue design, specifically including an inner flue and an outer flue. The inner flue passes inside the outer flue, with its exhaust end completely within the outer flue and a distance from its end. Multiple exhaust holes are arranged on the outer flue downstream of the inner flue's exhaust end, spaced circumferentially along the outer flue. An air intake channel forms between the inner and outer flues. A baffle ring is fitted over the exhaust end of the inner flue, separating the air intake channel from the exhaust channel formed by the inner flue's interior. An air inlet is located on the outer flue upstream of the inner flue's exhaust end.
[0003] When a balanced flue gas water heater is working, outdoor air enters the air intake channel through the air inlet, and then enters the main body of the balanced flue gas water heater for combustion. At the same time, the exhaust gas produced by combustion is discharged to the outside through the exhaust channel and the exhaust hole on the outer flue pipe, without consuming the air in the indoor space.
[0004] Some balanced flue gas water heaters are prone to high exhaust resistance. To overcome this problem, the length of the exhaust section is usually extended to accommodate more exhaust holes, thus meeting exhaust requirements. However, this increases the space occupied by the exhaust pipe extending outdoors, hindering its widespread adoption and implementation. Utility Model Content
[0005] One of the technical problems solved by this utility model is to provide a smoke exhaust pipe that can improve the smoothness of smoke exhaust while effectively controlling the compactness of the smoke exhaust pipe size.
[0006] The second technical problem solved by this utility model is to provide a gas-fired water heater that can improve the smoothness of flue gas exhaust while effectively controlling the compactness of the exhaust pipe size.
[0007] The first technical problem mentioned above is solved by the following technical solution:
[0008] A smoke exhaust pipe is provided with an end smoke exhaust port and a side smoke exhaust port. The side smoke exhaust port is located on the circumferential side wall of the smoke exhaust pipe, and the inner cavity of the smoke exhaust pipe is connected to the outside atmosphere through the side smoke exhaust port. The end smoke exhaust port is provided to extend through the smoke exhaust pipe along its axial direction, and the inner cavity of the smoke exhaust pipe is connected to the outside atmosphere through the end smoke exhaust port. The angle between the smoke exhaust direction of the side smoke exhaust port and the smoke exhaust direction of the end smoke exhaust port is greater than 0°.
[0009] The total cross-sectional area of the side smoke exhaust hole is S1, and the total cross-sectional area of the end smoke exhaust hole is S2, where S2 < S1.
[0010] The exhaust pipe described in this utility model has the following advantages compared with the prior art:
[0011] The smoke exhaust pipe provided by this utility model features both side smoke exhaust holes and end smoke exhaust holes, enabling simultaneous axial and side smoke exhaust. This not only allows the smoke exhaust pipe to pass through a smaller diameter installation hole to the outside without the need for hole enlargement, improving the ease of installation, but also eliminates the need to extend the length or increase the diameter of the smoke exhaust pipe, thereby improving smoke exhaust smoothness while effectively controlling the compact size of the smoke exhaust pipe. Furthermore, by limiting S2 < S1, more smoke can be discharged through the side smoke exhaust holes, reducing the amount of smoke discharged through the end smoke exhaust holes and mitigating the adverse effects of axial smoke exhaust, such as direct spraying of axial smoke onto building walls. In addition, the simultaneous use of axial and side smoke exhaust also helps to improve the wind resistance of the smoke exhaust pipe.
[0012] In one embodiment, the exhaust pipe includes a tail section and an exhaust end cap, and the plurality of side exhaust holes include a plurality of first side exhaust holes disposed on the circumferential sidewall of the tail section; the exhaust end cap includes a flow guide disposed in the tail section and having a tubular structure, and an exhaust portion disposed in the flow guide and having the end exhaust hole;
[0013] The outer peripheral wall of the guide member forms a guide surface. Along the direction of the flue gas passing through the end exhaust hole, the guide surface gradually moves away from the central axis of the tail pipe section, and the guide surface is spaced apart from the inner peripheral wall of the tail pipe section.
[0014] In one embodiment, the smoke outlet cover includes a mounting section connected to the outlet end of the guide member, the mounting section being fixedly installed inside the tail pipe section; the end face of the outlet end of the tail pipe section is a first end face, and among the plurality of first side smoke exhaust holes, the first side smoke exhaust hole closest to the first end face is the first smoke exhaust hole;
[0015] Along the axial direction of the tailpipe section, the minimum distance between the inner wall of the first smoke exhaust hole and the first end face is L1, the axial length of the installation section is L2, and the maximum distance between the inner wall of the first smoke exhaust hole and the first end face is L3; L1 < L2 < L3.
[0016] In one embodiment, the extension surface of the guide surface intersects the outer peripheral wall of the tail pipe section at a first intersection line, and the first exhaust port has a first inner wall and a second inner wall disposed opposite to each other along the axial direction of the tail pipe section, and the first intersection line is located between the first inner wall and the second inner wall along the axial direction of the tail pipe section.
[0017] In one embodiment, along the axial direction of the tailpipe segment, the first inner wall is closer to the first end face than the second inner wall, and the distance between the first inner wall and the first intersecting line is ΔL, where 2mm≤ΔL≤5mm.
[0018] In one embodiment, the exhaust pipe includes a tail pipe section and a smoke outlet end cap. The smoke outlet end cap includes a smoke outlet pipe section with one end connected to the tail pipe section and the other end located outside the tail pipe section, and a smoke outlet portion connected to the end of the smoke outlet pipe section away from the tail pipe section.
[0019] The end exhaust port is located at the smoke outlet, and the inner cavity of the smoke outlet pipe section is connected to the outside atmosphere through the end exhaust port; the plurality of side exhaust ports include a plurality of first side exhaust ports located on the circumferential outer wall of the tail pipe section, and a plurality of second side exhaust ports located on the circumferential side wall of the smoke outlet pipe section.
[0020] In one embodiment, a guide is provided in the smoke outlet pipe section, one end of the guide is connected to the inner wall edge of the second side smoke outlet near the smoke outlet end, and the other end extends towards the side near the central axis of the smoke outlet pipe section;
[0021] The guide member forms a guide surface on the side away from the smoke outlet, and along the direction of the smoke passing through the end smoke outlet hole, the guide surface gradually moves away from the central axis of the smoke outlet pipe section.
[0022] In one embodiment, the smoke outlet pipe section is a tapered pipe, and the inner diameter of the smoke outlet pipe section gradually decreases along the direction in which the smoke passes through the end smoke exhaust hole.
[0023] In one embodiment, the angle between the generatrix of the first tapered tube and the plane perpendicular to the axial direction of the smoke outlet tube section is β, where 30° < β < 45°.
[0024] And / or, the guide member has a first edge and a second edge disposed opposite to each other, the first edge being connected to the smoke outlet pipe section, and the distance between the first edge and the second edge being H; the second side smoke outlet corresponding to the guide member has a first hole wall and a second hole wall disposed opposite to each other along the axial direction of the smoke outlet pipe section, and the distance between the first hole wall and the second hole wall being W; 0.3W < H < 0.5W.
[0025] In one embodiment, a plurality of second side exhaust holes are divided into at least two groups that are spaced apart along the axial direction of the exhaust pipe section. Each group includes a plurality of second side exhaust holes that are spaced apart circumferentially along the exhaust pipe section. The second side exhaust holes and the guide are arranged in a one-to-one correspondence.
[0026] The second side smoke exhaust hole and the guide element are arranged in a one-to-one correspondence. In each group, the two guide elements corresponding to two adjacent second side smoke exhaust holes are arranged at intervals to form a smoke passage gap.
[0027] The two adjacent sets of second side exhaust holes are staggered along the circumference of the exhaust pipe section.
[0028] The second technical problem mentioned above is solved by the following technical solution:
[0029] A gas-fired water heater includes the exhaust pipe provided in any of the above embodiments.
[0030] Compared with the prior art, the gas-fired water heating device of this utility model has the following advantages:
[0031] The gas-fired water heater provided by this utility model includes the aforementioned exhaust port. Both side exhaust ports and end exhaust ports are simultaneously provided on the exhaust pipe, enabling the exhaust pipe to simultaneously employ axial and side exhaust. This not only allows the exhaust pipe to pass through a smaller diameter installation hole to the outside without the need for hole enlargement, improving the ease of installation, but also eliminates the need to extend the length or increase the diameter of the exhaust pipe, thereby improving exhaust smoothness while effectively controlling the compact size of the exhaust pipe. Furthermore, by limiting S2 < S1, more flue gas can be discharged through the side exhaust port, reducing the amount of flue gas discharged through the end exhaust port and mitigating the adverse effects of axial exhaust, such as axial exhaust directly spraying onto the building walls. In addition, the simultaneous use of axial and side exhaust in the exhaust pipe also helps improve the wind resistance of the exhaust pipe. Attached Figure Description
[0032] Figure 1 This is a schematic diagram of the exhaust pipe provided in Embodiment 1 of this utility model;
[0033] Figure 2 This is a cross-sectional view of the exhaust pipe provided in Embodiment 1 of this utility model;
[0034] Figure 3 This is a schematic diagram of the structure of the smoke outlet end cap provided in Embodiment 1 of this utility model;
[0035] Figure 4 yes Figure 2 A magnified view of a portion of point A in the middle;
[0036] Figure 5This is a partial sectional view of the exhaust pipe provided in Embodiment 1 of this utility model;
[0037] Figure 6 This is a cross-sectional view of the exhaust pipe provided in Embodiment 2 of this utility model;
[0038] Figure 7 yes Figure 6 A magnified view of a portion of point B in the middle;
[0039] Figure 8 This is a schematic diagram of the structure of the smoke outlet end cap provided in Embodiment 2 of this utility model;
[0040] Figure 9 This is an axial schematic diagram of the smoke outlet end cover as viewed from the direction of the smoke outlet section to the installation section, provided in Embodiment 2 of this utility model;
[0041] Figure 10 This is a side view of the smoke outlet end cap provided in Embodiment 2 of this utility model;
[0042] Figure 11 This is a cross-sectional view of the smoke outlet end cap provided in Embodiment 2 of this utility model.
[0043] In the picture:
[0044] 1. Tailpipe section; 11. First side exhaust port; 111. First inner wall; 112. Second inner wall; 12. First end face;
[0045] 2. Smoke outlet end cap; 21. Flow guide; 211. Flow guide surface; 22. Installation section; 23. Smoke outlet part; 231. End smoke exhaust hole; 24. Smoke outlet pipe section; 241. Second side smoke exhaust hole;
[0046] 100, First intersecting line; 200, Side smoke exhaust hole; 300, Smoke passage gap. Detailed Implementation
[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0048] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0051] Example 1
[0052] This utility model provides a flue pipe and a gas-fired water heater including the flue pipe, which can improve flue gas exhaust smoothness while effectively controlling the compact size of the flue pipe. It should be noted that the gas-fired water heater refers to a gas water heater.
[0053] like Figures 1 to 5 As shown, the exhaust pipe has an end exhaust port 231 and a side exhaust port 200. The side exhaust port 200 is located on the circumferential outer wall of the exhaust pipe, and the inner cavity of the exhaust pipe is connected to the outside atmosphere through the side exhaust port 200. The end exhaust port 231 is arranged to extend through the exhaust pipe along the axial direction, and the inner cavity of the exhaust pipe is connected to the outside atmosphere through the end exhaust port 231. The angle between the exhaust direction of the side exhaust port 200 and the exhaust direction of the end exhaust port 231 is greater than 0°. The total cross-sectional area of the side exhaust port 200 is S1, and the total cross-sectional area of the end exhaust port 231 is S2, where S2 < S1.
[0054] By simultaneously providing side exhaust holes 200 and end exhaust holes 231 on the exhaust pipe, the exhaust pipe can simultaneously employ axial and side exhaust. This not only allows the exhaust pipe to pass through a smaller diameter installation hole to the outside without the need for hole enlargement, improving the ease of installation, but also eliminates the need to extend the length or increase the diameter of the exhaust pipe, thereby improving the smoothness of exhaust while effectively controlling the compactness of the exhaust pipe size. Furthermore, by limiting S2 < S1, more smoke can be discharged through the side exhaust holes 200, reducing the amount of smoke discharged through the end exhaust holes 231, and mitigating the adverse effects of axial exhaust, such as axial exhaust directly spraying onto the building walls.
[0055] In addition, the simultaneous use of axial and lateral smoke exhaust in the smoke exhaust pipe also helps to improve the wind resistance of the smoke exhaust pipe.
[0056] In some embodiments, such as Figures 3 to 5 As shown, at least a portion of the side exhaust port 200 is provided with a guide member 21. The guide member 21 has a guide surface 211. Along the direction of the flue gas passing through the end exhaust port 231, the guide surface 211 gradually moves away from the central axis of the exhaust pipe. The guide surface 211 is used to divert the flue gas that is about to enter the end exhaust port 231 in the exhaust pipe and guide the diverted flue gas into the side exhaust port 200.
[0057] The guide surface 211 diverts the flue gas that is about to enter the end exhaust port 231 and guides the diverted flue gas to the side exhaust port 200, so that more flue gas is discharged into the outside atmosphere through the side exhaust port 200, thereby reducing the amount of flue gas discharged into the outside atmosphere through the end exhaust port 231.
[0058] In some embodiments, such as Figures 3 to 5 As shown, the exhaust pipe includes a tail section 1 and an exhaust end cap 2. Multiple side exhaust holes 200 include multiple first side exhaust holes 11 provided on the circumferential side wall of the tail section 1. The exhaust end cap 2 includes a guide member 21 with a tubular structure provided inside the tail section 1 and an exhaust portion 23 provided inside the guide member 21 and provided with an end exhaust hole 231. The outer peripheral wall of the guide member 21 forms the aforementioned guide surface 211. Along the direction of the flue gas passing through the end exhaust hole 231, the guide surface 211 gradually moves away from the central axis of the tail section 1. The guide surface 211 is spaced apart from the inner peripheral wall of the tail section 1.
[0059] The flue gas flowing towards the smoke outlet end cover 2 is guided by the guide surface 211 to the inner circumferential wall of the tail pipe section 1, so that the flue gas can be discharged through the side smoke exhaust hole 200 on the circumferential side wall of the tail pipe section 1, thereby reducing the amount of flue gas discharged to the outside atmosphere through the end smoke exhaust hole 231.
[0060] For example, the guide member 21 is a tapered tube, and correspondingly, the outer circumferential surface of the guide member 21 is a conical surface. Along the direction in which the flue gas passes through the end exhaust hole 231, the inner diameter of the guide member 21 gradually increases. The exhaust portion 23 is located at the small-diameter end of the guide member 21. This arrangement is advantageous because it utilizes the non-perforated area of the exhaust portion 23 to block the airflow, thereby reducing the amount of flue gas discharged to the outside atmosphere through the end exhaust hole 231.
[0061] In some embodiments, such as Figures 3 to 5 As shown, the small-diameter edge of the guide member 21 is folded inward to form a first inner flange. The smoke outlet 23 is placed on the side of the first inner flange near the large-diameter end of the guide member 21. Then, the guide member 21 is welded and fixed to the first inner flange. The fixing method of the guide member 21 and the smoke outlet 23 is simple and low-cost. As an alternative, the smoke outlet 23 can also be integrally formed into the guide member 21, such as by integral casting or integral stamping.
[0062] In some embodiments, such as Figures 3 to 5 As shown, in order to install the smoke outlet end cap 2 onto the tailpipe section 1, the smoke outlet end cap 2 further includes an installation section 22 connected to the outlet end of the guide member 21. The installation section 22 is fixedly installed inside the tailpipe section 1. For example, the installation section 22 is a circular pipe, the tailpipe section 1 is a circular pipe, and the installation section 22 is installed inside the tailpipe section 1 with an interference fit. Alternatively, the installation section 22 can be welded and fixed inside the tailpipe section 1.
[0063] In some embodiments, such as Figures 3 to 5 As shown, the guide component 21 and the mounting section 22 are integrally formed structural components, which simplifies the processing of the smoke outlet end cap 2, reduces processing costs, and improves processing efficiency.
[0064] In some embodiments, the plurality of first side smoke exhaust holes 11 are divided into at least two groups arranged sequentially at intervals along the axial direction of the tailpipe section 1. Each group of first side smoke exhaust holes 11 includes a plurality of first side smoke exhaust holes 11 arranged sequentially at intervals along the circumference of the tailpipe section 1 to meet side smoke exhaust requirements. Exemplarily, the first side smoke exhaust holes 11 are divided into two groups. It should be noted that the number of groups of first side smoke exhaust holes 11 can be arranged according to actual smoke exhaust requirements, and can also be three, four or more groups.
[0065] In some embodiments, such as Figures 3 to 5 As shown, the end face of the outlet end of the tailpipe section 1 is the first end face 12. Among the multiple first side exhaust holes 11, the first side exhaust hole 11 closest to the first end face 12 is the first exhaust hole. Along the axial direction of the tailpipe section 1, the minimum distance between the inner wall of the first exhaust hole and the first end face 12 is L1, the axial length of the mounting section 22 is L2, and along the axial direction of the tailpipe section 1, the maximum distance between the inner wall of the first exhaust hole and the first end face 12 is L3; L1 < L2 < L3.
[0066] This design allows the flue gas guided by the guide surface 211 to the inner periphery of the tailpipe section 1 to be directly guided to be discharged into the outside atmosphere through the side exhaust port 200. This prevents the flue gas that has detached from the guide surface 211 from rushing to the inner periphery of the tailpipe section 1, causing flue gas backflow and increasing exhaust resistance and exhaust noise.
[0067] In some embodiments, such as Figures 3 to 5 As shown, the extended surface of the guide surface 211 intersects the outer peripheral wall of the tail pipe section 1 at the first intersection line 100. The first exhaust hole has a first inner wall 111 and a second inner wall 112 arranged opposite to each other along the axial direction of the tail pipe section 1. The first intersection line 100 is located between the first inner wall 111 and the second inner wall 112 along the axial direction of the tail pipe section 1.
[0068] This ensures that the flue gas detached from the guide surface 211 is guided into the first exhaust hole and will not rush to the inner wall of the first exhaust hole, thus increasing the exhaust resistance and exhaust noise.
[0069] In some embodiments, such as Figures 3 to 5 As shown, along the axial direction of the tailpipe section 1, the first inner wall 111 is closer to the first end face 12 than the second inner wall 112, and the distance between the first inner wall 111 and the first intersecting line 100 is △L, 2mm≤△L≤5mm.
[0070] This configuration ensures that the first phase intersection line 100 is close to the first inner wall 111, making full use of the first smoke exhaust hole for smoke exhaust, and avoiding the first phase intersection line 100 being too close to the second inner wall 112, which would prevent the first smoke exhaust hole between the first phase intersection line 100 and the first inner wall 111 from being fully utilized.
[0071] It should be noted that △L can be any value within the range of 2mm or greater and 5mm or less. For example, △L can be any value among 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, and 5mm.
[0072] In some embodiments, such as Figures 3 to 5 As shown, when the guide element 21 is a tapered tube, the outer peripheral surface of the guide element 21, i.e., the guide surface 211, is a tapered surface with a half-apex angle of α, where 30°≤α≤45°. This ensures that the guide surface 211 meets the flow guidance requirements while avoiding an excessively large α that would result in an excessively small total cross-sectional area of the end exhaust hole 231.
[0073] It should be noted that α can be any angle within the range of 30° or greater and 45° or less. For example, α can be any angle among 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, and 45°.
[0074] In some embodiments, such as Figures 3 to 5 As shown, the end smoke exhaust hole 231 is a polygonal hole, which allows for the arrangement of as many end smoke exhaust holes 231 as possible. For example, the end smoke exhaust hole 231 is a hexagonal hole. It should be noted that the end smoke exhaust hole 231 can also be a triangular hole, a quadrilateral hole, or a pentagonal hole, etc.
[0075] It should be noted that regardless of the polygon shape of the end smoke exhaust hole 231, a sphere with a diameter of 16mm must not pass through the end smoke exhaust hole 231 in order to meet the smoke exhaust standard requirements.
[0076] In some embodiments, such as Figures 3 to 5 As shown, the length of the first side exhaust port 11 along the circumference of the tailpipe section 1 is L4, where 0.2D < L4 < 0.25D, and D represents the diameter of the tailpipe section 1. This configuration increases the cross-sectional area of the side exhaust port 200. It should be noted that L4 can be any value within the range of 0.2D to 0.25D, such as any one of 0.205D, 0.21D, 0.215D, 0.22D, 0.225D, 0.23D, 0.235D, or 0.24D.
[0077] In some embodiments, such as Figures 3 to 5 As shown, the length of the side exhaust port 200 along the axial direction of the tailpipe section 1 is L5, where 8mm < L5 < 16mm. By limiting L5 to less than 16mm, the diameter of the side exhaust port 200 meets the exhaust standard requirements, meaning a sphere with a diameter of 16mm cannot pass through the side exhaust port 200. By limiting L5 to greater than 8mm, the cross-sectional area of a single side exhaust port 200 can be maximized, thereby increasing the exhaust volume.
[0078] It should be noted that L5 can be any value within the range of greater than 8mm and less than 16mm, such as any one of 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, or 15mm.
[0079] In the first embodiment, the total cross-sectional area S1 of the side smoke exhaust hole 200 is the sum of the cross-sectional areas of the plurality of first side smoke exhaust holes 11.
[0080] Example 2
[0081] The main difference between this embodiment and Embodiment 1 is that: Figures 6 to 11As shown, the tail pipe section 1 and the smoke outlet end cap 2 have different positional relationships. Specifically, the smoke exhaust pipe includes the tail pipe section 1 and the smoke outlet end cap 2. The smoke outlet end cap 2 includes a smoke outlet pipe section 24 connected to the tail pipe section 1 at one end and located outside the tail pipe section 1, and a smoke outlet part 23 connected to the end of the smoke outlet pipe section 24 away from the tail pipe section 1. The end smoke outlet hole 231 is provided in the smoke outlet part 23, and the inner cavity of the smoke outlet pipe section 24 is connected to the outside atmosphere through the end smoke outlet hole 231. The multiple side smoke outlet holes 200 include multiple first side smoke outlet holes 11 provided on the circumferential outer wall of the tail pipe section 1, and multiple second side smoke outlet holes 241. The second side smoke outlet holes 241 are provided on the circumferential side wall of the smoke outlet pipe section 24 located outside the tail pipe section 1.
[0082] By setting a first side smoke exhaust hole 11 on the tail pipe section 1 and a second side smoke exhaust hole 241 on the smoke outlet pipe section 24, side smoke exhaust holes 200 are set on both the tail pipe section 1 and the smoke outlet pipe section 24 located outside the tail pipe section 1. This further increases the amount of smoke discharged through the circumferential side of the smoke exhaust pipe and reduces the amount of smoke discharged from the end smoke exhaust hole 231, thereby reducing the adverse effects of axial smoke exhaust, such as axial smoke exhaust directly spraying onto the building wall.
[0083] The total cross-sectional area S1 of the side smoke exhaust hole 200 is equal to the sum of the cross-sectional areas of the multiple first side smoke exhaust holes 11, S11, plus the sum of the cross-sectional areas of the multiple second side smoke exhaust holes 241, S12.
[0084] In some embodiments, such as Figure 7 As shown, the end of the smoke outlet pipe section 24 away from the smoke outlet part 23 is connected to an installation section 22, which extends into and is fixed to the tail pipe section 1. Exemplarily, the installation section 22 is installed in the tail pipe section 1 with an interference fit.
[0085] In some embodiments, a guide member 21 is provided in the smoke outlet pipe section 24. One end of the guide member 21 is connected to the inner wall edge of the second side smoke outlet hole 241 near the end of the smoke outlet section 23, and the other end extends towards the side near the central axis of the smoke outlet pipe section 24. The side of the guide member 21 away from the smoke outlet section 23 forms a guide surface 211. Along the direction of the smoke passing through the end smoke outlet hole 231, the guide surface 211 gradually moves away from the central axis of the smoke outlet pipe section 24.
[0086] After the flue gas enters the flue section 24, the flue gas near the inner peripheral wall of the flue section 24 will enter the second side flue gas hole 241 under the guiding action of the guide surface 211. The flue gas near the central axis of the flue section 24 will be discharged into the outside atmosphere through the end flue gas hole 231.
[0087] For example, the guide member 21 is integrally formed on the smoke outlet pipe section 24. Specifically, the second side smoke outlet hole 241 and the guide member 21 are formed by punching the smoke outlet pipe section 24. To facilitate punching, the guide member 21 is perpendicular to the inner peripheral wall of the smoke outlet pipe section 24, and the guide member 21 is generally a plate-shaped structure.
[0088] In some embodiments, such as Figures 7 to 8 As shown, the smoke outlet pipe section 24 is a tapered pipe, and its inner diameter gradually decreases along the direction in which the smoke passes through the end smoke outlet hole 231. By using this smoke outlet pipe section 24 and cooperating with the guide member 21, the angle between the flow direction of the smoke discharged through the second side smoke outlet hole 241 and the smoke discharge direction of the end smoke outlet hole 231 is increased, thereby making it less likely for the smoke discharged through the second side smoke outlet hole 241 to spray onto the opposite building wall.
[0089] In some embodiments, such as Figure 7 As shown, the angle between the generatrix of the smoke outlet pipe section 24 and the plane perpendicular to the axial direction of the smoke outlet pipe section 24 is β, where 30° < β < 45°. This ensures the flow guidance effect of the inner circumferential wall of the smoke outlet pipe section 24 while avoiding an excessively large β that would result in insufficient space for the arrangement of the second side smoke exhaust port 241. It should be noted that β can be any angle within the range of 30° to 45°, such as 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, or 44°.
[0090] In some embodiments, such as Figures 7 to 8 As shown, the plurality of second side exhaust holes 241 are divided into at least two groups that are spaced apart along the axial direction of the exhaust pipe section 24. Each group includes a plurality of second side exhaust holes 241 that are spaced apart along the circumferential direction of the exhaust pipe section 24. The second side exhaust holes 241 and the guide member 21 are arranged in a one-to-one correspondence.
[0091] For example, the smoke outlet pipe section 24 is provided with two sets of second side smoke exhaust holes 241. It should be noted that the second side smoke exhaust holes 241 can also be arranged as one set, three sets, or more, depending on actual needs and installation requirements.
[0092] For ease of description, along the direction of flue gas passing through the end exhaust port 231, the two adjacent sets of second side exhaust ports 241 are respectively referred to as the upstream exhaust port and the downstream exhaust port. The guide member 21 corresponding to the upstream exhaust port is the upstream guide member, and the guide member 21 corresponding to the downstream exhaust port is the downstream guide member.
[0093] The exhaust pipe section 24 is a tapered pipe. Along the direction of the flue gas passing through the end exhaust hole 231, the inner diameter of the exhaust pipe section 24 gradually decreases, giving the inner wall of the exhaust pipe section 24 a guiding effect. The flue gas entering the exhaust pipe section 24 flows towards the upstream exhaust hole under the guiding effect of the inner wall of the exhaust pipe section 24. Under the action of the upstream guide, more flue gas is guided into the upstream exhaust hole. The flue gas that does not enter the upstream exhaust hole is mainly concentrated in the area near the central axis of the exhaust pipe section 24. This part of the flue gas flows towards the downstream exhaust hole under the guiding effect of the inner wall of the exhaust pipe section 24, and enters the downstream exhaust hole under the guiding effect of the downstream guide.
[0094] Furthermore, as the inner diameter of the exhaust pipe section 24 gradually decreases along the direction of the flue gas passing through the end exhaust hole 231, the upstream guide component obstructs the downstream exhaust hole less, allowing more flue gas to be discharged into the outside atmosphere through the downstream exhaust hole.
[0095] In some embodiments, such as Figure 10 and Figure 11 As shown, the guide member 21 has a first edge and a second edge arranged opposite to each other. The first edge is connected to the smoke outlet pipe section 24, and the distance between the first edge and the second edge is H. The second side smoke outlet 241 corresponding to the guide member 21 has a first hole wall and a second hole wall arranged opposite to each other along the axial direction of the smoke outlet pipe section 24, and the distance between the first hole wall and the second hole wall is W, where 0.3W < H < 0.5W. This arrangement can minimize the obstruction of the downstream smoke outlet by the upstream guide member.
[0096] It should be noted that H can be any value within the range of 0.3W to 0.5W, such as 0.31W, 0.32W, 0.33W, 0.34W, 0.35W, 0.36W, 0.37W, 0.38W, 0.39W, 0.4W, 0.41W, 0.42W, 0.43W, 0.44W, 0.45W, 0.46W, 0.47W, 0.48W, and 0.49W.
[0097] In some embodiments, by simultaneously limiting 30° < β < 45° and 0.3W < H < 0.5W, it is possible to effectively prevent the upstream guide from blocking the downstream smoke exhaust port, ensuring that the downstream smoke exhaust port can be fully used for smoke exhaust.
[0098] In some embodiments, such as Figure 8 and Figure 9 As shown, in each group, two guide members 21 corresponding to two adjacent second side smoke exhaust holes 241 are spaced apart to form a smoke passage gap 300, and the two adjacent groups of second side smoke exhaust holes 241 are staggered along the circumference of the smoke outlet pipe section 24.
[0099] This design allows the flue gas to pass through the flue gas gap 300 and directly enter the downstream second side exhaust port 241, which helps to discharge more flue gas into the outside atmosphere through the second side exhaust port 241.
[0100] For example, the second side exhaust holes 241 of two adjacent groups are completely offset along the circumference of the exhaust pipe section 24, which allows more flue gas to be discharged into the outside atmosphere through the second side exhaust holes 241.
[0101] It should be noted that, since the inner diameter of the small-diameter end of the smoke outlet pipe section 24 is relatively small, the end smoke exhaust hole 231 can be set as a circular hole. It is necessary to ensure that the diameter of the circular hole is less than 16mm to ensure that a sphere with a diameter of 16mm cannot pass through the end smoke exhaust hole 231. Specifically, the edge of the end of the smoke outlet pipe section 24 away from the tail pipe section 1 is folded inward to form a second inner flange. The second inner flange is an annular structure, and the inner hole of the annular structure forms the end smoke exhaust hole 231.
[0102] As an alternative, the end exhaust hole 231 can also be configured as multiple polygonal holes, as long as a 16mm diameter sphere cannot pass through the end exhaust hole 231.
[0103] In some embodiments, the distance between the opposite side walls of the second side exhaust hole 241 distributed axially along the exhaust pipe section 24 is less than 16 mm, and the distance between the opposite side walls of the second side exhaust hole 241 distributed circumferentially along the exhaust pipe section 24 is less than 16 mm, so that a sphere with a diameter of 16 mm cannot pass through the second side exhaust hole 241.
[0104] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.
[0105] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A smoke exhaust pipe, characterized in that, The exhaust pipe is provided with an end exhaust port (231) and a side exhaust port (200). The side exhaust port (200) is located on the circumferential side wall of the exhaust pipe, and the inner cavity of the exhaust pipe is connected to the outside atmosphere through the side exhaust port (200). The end exhaust port (231) is provided to extend through the exhaust pipe along the axial direction, and the inner cavity of the exhaust pipe is connected to the outside atmosphere through the end exhaust port (231). The angle between the exhaust direction of the side exhaust port (200) and the exhaust direction of the end exhaust port (231) is greater than 0°. The total cross-sectional area of the side smoke exhaust hole (200) is S1, and the total cross-sectional area of the end smoke exhaust hole (231) is S2, where S2 < S1.
2. The exhaust pipe according to claim 1, characterized in that, The exhaust pipe includes a tail pipe section (1) and an exhaust end cap (2), and the plurality of side exhaust holes (200) include a plurality of first side exhaust holes (11) provided on the circumferential sidewall of the tail pipe section (1); The smoke outlet end cap (2) includes a flow guide (21) which is tubular in structure and is disposed in the tail pipe section (1), and a smoke outlet (23) which is disposed in the flow guide (21) and has the end smoke outlet hole (231); The outer peripheral wall of the guide member (21) forms a guide surface (211). Along the direction of the flue gas passing through the end exhaust hole (231), the guide surface (211) gradually moves away from the central axis of the tail pipe section (1). The guide surface (211) and the inner peripheral wall of the tail pipe section (1) are spaced apart.
3. The exhaust pipe according to claim 2, characterized in that, The smoke outlet end cap (2) includes an installation section (22) connected to the outlet end of the guide member (21), and the installation section (22) is fixedly installed in the tail pipe section (1); the end face of the outlet end of the tail pipe section (1) is the first end face (12), and among the plurality of first side smoke exhaust holes (11), the first side smoke exhaust hole (11) closest to the first end face (12) is the first smoke exhaust hole; Along the axial direction of the tail pipe section (1), the minimum distance between the inner wall of the first smoke exhaust hole and the first end face (12) is L1, the axial length of the mounting section (22) is L2, and the maximum distance between the inner wall of the first smoke exhaust hole and the first end face (12) is L3; L1 < L2 < L3.
4. The exhaust pipe according to claim 3, characterized in that, The extension surface of the guide surface (211) intersects the outer peripheral wall of the tail pipe section (1) at a first intersection line (100). The first exhaust hole has a first inner wall (111) and a second inner wall (112) arranged opposite to each other along the axial direction of the tail pipe section (1). Along the axial direction of the tail pipe section (1), the first intersection line (100) is located between the first inner wall (111) and the second inner wall (112).
5. The exhaust pipe according to claim 4, characterized in that, Along the axial direction of the tail pipe section (1), the first inner wall (111) is closer to the first end face (12) than the second inner wall (112), and the distance between the first inner wall (111) and the first intersecting line (100) is △L, 2mm≤△L≤5mm.
6. The exhaust pipe according to claim 1, characterized in that, The exhaust pipe includes a tail pipe section (1) and an exhaust end cap (2). The exhaust end cap (2) includes an exhaust pipe section (24) with one end connected to the tail pipe section (1) and located outside the tail pipe section (1), and an exhaust part (23) connected to the end of the exhaust pipe section (24) away from the tail pipe section (1). The end smoke vent (231) is provided on the smoke outlet (23), and the inner cavity of the smoke outlet pipe section (24) is connected to the outside atmosphere through the end smoke vent (231); the plurality of side smoke vents (200) include a plurality of first side smoke vents (11) provided on the circumferential outer wall of the tail pipe section (1), and a plurality of second side smoke vents (241), the second side smoke vents (241) being provided on the circumferential side wall of the smoke outlet pipe section (24).
7. The exhaust pipe according to claim 6, characterized in that, The smoke outlet pipe section (24) is provided with a guide (21). One end of the guide (21) is connected to the inner wall edge of the second side smoke outlet hole (241) near the end of the smoke outlet part (23), and the other end extends towards the side near the central axis of the smoke outlet pipe section (24). The guide member (21) forms a guide surface (211) on the side away from the smoke outlet (23). Along the direction of the smoke passing through the end smoke outlet (231), the guide surface (211) gradually moves away from the central axis of the smoke outlet pipe section (24).
8. The exhaust pipe according to claim 7, characterized in that, The smoke outlet pipe section (24) is a tapered pipe, and the inner diameter of the smoke outlet pipe section (24) gradually decreases along the direction of the smoke passing through the end smoke outlet hole (231).
9. The exhaust pipe according to claim 8, characterized in that, The angle between the generatrix of the smoke outlet pipe section (24) and the plane perpendicular to the axial direction of the smoke outlet pipe section (24) is β, where 30° < β < 45°. And / or, the guide member (21) has a first edge and a second edge disposed opposite to each other, the first edge being connected to the smoke outlet pipe section (24), and the distance between the first edge and the second edge being H; the second side smoke outlet hole (241) corresponding to the guide member (21) has a first hole wall and a second hole wall disposed opposite to each other along the axial direction of the smoke outlet pipe section (24), and the distance between the first hole wall and the second hole wall being W; 0.3W < H < 0.5W.
10. The exhaust pipe according to claim 8, characterized in that, The plurality of second side exhaust holes (241) are divided into at least two groups that are spaced apart along the axial direction of the exhaust pipe section (24), each group including a plurality of second side exhaust holes (241) spaced apart along the circumferential direction of the exhaust pipe section (24); The second side smoke exhaust hole (241) and the guide (21) are arranged in a one-to-one correspondence. In each group, the two guides (21) corresponding to two adjacent second side smoke exhaust holes (241) are arranged at intervals to form a smoke passage gap (300). The two adjacent sets of second side smoke exhaust holes (241) are staggered along the circumference of the smoke exhaust pipe section (24).
11. A gas-fired hot water device, characterized in that, Includes the exhaust pipe as described in any one of claims 1 to 10.