Smoke exhaust structure and outdoor gas water heater
By arranging a water absorption rope and a guide surface in the smoke exhaust structure, the problem of flue gas condensation water dripping is solved, and normal smoke exhaust and safe operation of the gas water heater are achieved.
Patent Information
- Application Number
- CN202421857450.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-02
AI Technical Summary
During the exhaust process of existing outdoor gas water heaters, the flue gas condenses into liquid water, which easily drips into the exhaust port, causing flue corrosion and poor exhaust, affecting the normal operation and safety of the equipment.
A water removal structure is set in the smoke exhaust structure, including a water absorption rope and a guide surface. The water absorption rope extends along the side wall and the top wall to the bottom end of the guide surface to absorb and drain the condensed water to prevent it from dripping into the smoke outlet.
Effectively reduce condensation dripping, ensure the normal operation of gas water heaters when used outdoors and improve smoke exhaust efficiency and safety.
Smart Images
Figure CN222938028U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of outdoor gas water heaters, in particular to a smoke exhaust structure and an outdoor gas water heater. Background Art
[0002] A gas water heater is a water heater that uses gas as an energy source. It generates heat by burning gas and then heats water to provide hot water for households or commercial places. When the gas water heater is used as an outdoor unit, the smoke exhaust port of its smoke collecting device is prone to water ingress and dust deposition. To ensure the normal operation and safety of the equipment, most existing outdoor gas water heaters are equipped with a smoke exhaust hood for waterproofing and dustproofing at the smoke exhaust port.
[0003] Existing outdoor gas water heaters usually include a bottom cover and a cover body connected to the bottom cover. A cavity is formed inside the cover body. During use, the bottom cover is installed at the smoke exhaust port of the gas water heater. The smoke exhaust port extends into the bottom cover and communicates with the cavity of the cover body. The cover body covers the smoke exhaust port to play a role in dust prevention and rain protection. The smoke generated by the gas water heater enters the smoke exhaust hood through the smoke exhaust port and is finally discharged outwards through the window on the side wall of the cover body to ensure the normal smoke exhaust of the gas water heater.
[0004] However, existing outdoor gas water heaters have the following defects when in use: The gas for burning and generating heat in current gas water heaters is usually natural gas or liquefied petroleum gas (LPG). Water vapor is generated during combustion and is discharged together with the smoke. During the smoke exhaust process, after the smoke contacts the inner wall of the smoke exhaust hood, it is easy to condense into liquid water at the top of the inner wall of the smoke exhaust hood. The liquid water is likely to drip into the smoke exhaust port under the action of its own gravity, causing water accumulation inside the flue, increasing the risk of flue corrosion, affecting the normal discharge of smoke, and resulting in unsmooth smoke exhaust or backflow. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a smoke exhaust structure and an outdoor gas water heater to solve the above problems.
[0006] To achieve the above purpose, the following technical solutions are provided:
[0007] In a first aspect, the utility model provides a smoke exhaust structure, including: a mounting surface, on which a smoke outlet is provided; a cover body, which is connected to the mounting surface and forms a smoke exhaust cavity communicating with the smoke outlet; the smoke exhaust cavity includes a top wall and side walls surrounding and connecting the edge of the top wall; the top wall is positioned above the smoke outlet and is aligned with the smoke outlet; the side walls are provided with smoke exhaust ports for discharging smoke; the cover body is provided with a water removal structure for guiding water flow to reduce the condensation water droplets on the surface of the top wall from falling into the smoke outlet. The water removal structure includes a water absorption rope connected to the side wall. One end of the water absorption rope fits and extends along the side wall and / or the top wall to connect to the bottom end of the top wall, and the other end of the water absorption rope passes through the side wall and extends to the outside of the cover body.
[0008] As an alternative solution of the smoke exhaust structure provided by the present utility model, the top wall is provided with a diversion surface for converging and accumulating condensed water, and the water absorption rope extends and is connected to the bottom end of the diversion surface.
[0009] As an alternative solution of the smoke exhaust structure provided by the present utility model, the top wall is provided with a fluid guide body having a conical structure, the conical top end of the fluid guide body is aligned and pointed at the smoke inlet, the side surface of the fluid guide body extends from the conical top end of the fluid guide body to the bottom end of the top wall, and the diversion surface is formed on the side surface of the fluid guide body.
[0010] As an alternative solution of the smoke exhaust structure provided by the present utility model, the bottom of the top wall is recessed downward to integrally form the fluid guide body.
[0011] As an alternative solution of the smoke exhaust structure provided by the present utility model, the side wall and / or the top wall bulge towards the inside of the smoke exhaust cavity to form a plurality of positioning holes, and the water absorption rope is detachably inserted and positioned in the positioning holes.
[0012] As an alternative solution of the smoke exhaust structure provided by the present utility model, the water removal structure further includes a plurality of fixing pieces, the fixing pieces include a positioning portion with a bridge-shaped arch, and both ends of the positioning portion extend outwards to form connecting portions for connecting the top wall and / or the side wall, and the positioning holes are formed on the positioning portion.
[0013] As an alternative solution of the smoke exhaust structure provided by the present utility model, a water dispersing body is arranged on the outer wall of the cover body, the water dispersing body abuts against one end of the water absorption rope passing through the smoke exhaust cavity, and is used for breaking the surface tension of the condensed water on the water absorption rope.
[0014] As an alternative solution of the smoke exhaust structure provided by the present utility model, the water dispersing body is a porous ceramic block.
[0015] As an alternative solution of the smoke exhaust structure provided by the present utility model, an isolation cylinder with an open bottom is arranged outside the cover body, and one end of the water absorption rope passing through the cover body extends into the isolation cylinder.
[0016] In a second aspect, the present utility model further provides an outdoor gas water heater, which includes a machine shell, a burner, a heat exchanger and a smoke collecting device are arranged in the machine shell, and further includes the smoke exhaust structure as described above.
[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: a water removal structure is arranged on the cover body, and the condensed water formed on the bottom wall surface is drained through the water removal structure, so as to reduce the condensed water droplets formed on the top wall surface from entering the smoke outlet, ensuring that the gas water heater can operate normally and safely and reliably when used outdoors. Description of the Drawings
[0018] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.
[0019] Figure 1 is a schematic structural view of the smoke exhaust structure Figure 1 ;
[0020] Figure 2 is a schematic structural view of the smoke exhaust structure Figure 2 ;
[0021] Figure 3 is a schematic structural view of the cover body of the smoke exhaust structure without a water removal structure;
[0022] Figure 4 is a schematic cross-sectional view of the smoke exhaust structure;
[0023] Figure 5 is a schematic structural view of the cover body of the smoke exhaust structure with a water removal structure Figure 1 ;
[0024] Figure 6 is a schematic structural view of the fixing piece;
[0025] Figure 7 is a schematic structural view of the water dispersing body;
[0026] Figure 8 is a schematic structural view of the cover body of the smoke exhaust structure with a water removal structure Figure 2 .
[0027] In the figure:
[0028] 1, mounting surface; 2, cover body; 21, smoke exhaust cavity; 22, top wall; 23, side wall; 24, smoke exhaust port; 3, smoke outlet; 4, buffer structure; 41, guiding surface; 42, guiding body; 43, first guiding arc surface; 44, second guiding arc surface; 5, water removal structure; 51, water absorption rope; 511, water absorption end; 512, drainage end;
[0029] 62, positioning hole; 63, fixing piece; 631, positioning part; 632, connecting part; 64, water dispersing body; 65, isolation cylinder; 66, drainage rod; 67, drainage port; 7, machine shell. Detailed implementation manners
[0030] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] Implementation case 1:
[0034] refer to Figures 1 to 4 A smoke exhaust structure includes a mounting surface 1 and a cover body 2. The mounting surface 1 is provided with a smoke outlet 3. The cover body 2 is connected to the mounting surface 1 and forms a smoke exhaust cavity 21 connected to the smoke outlet 3. The bottom of the cover body 2 is provided with a smoke outlet 3 connected to the smoke exhaust cavity 21. The smoke outlet 3 can be connected to the smoke outlet end of the gas water heater to transport smoke into the smoke exhaust cavity 21. The smoke exhaust cavity 21 includes a top wall 22 and a side wall 23. The top wall 22 is arranged in alignment with the smoke outlet 3. The side panels surround and connect the edges of the top wall 22. A plurality of smoke exhaust ports 24 are provided on the side wall 23 for exhausting the smoke in the smoke exhaust cavity 21. In this embodiment, at least one smoke exhaust port 24 has a bottom height lower than the smoke outlet 3.
[0035] During operation, the smoke outlet 3 is connected to the smoke exhaust end of the gas water heater. The cover body 2 is connected and covers the smoke outlet 3 to play a role in dust prevention and rain protection. The flue gas generated by the gas water heater enters the smoke exhaust cavity 21 through the smoke outlet 3 and is finally discharged outwards through the smoke outlet 24 on the side wall 23, ensuring the normal smoke exhaust of the gas water heater.
[0036] Another improvement of this application lies in: a buffer structure 4 is provided at the bottom end of the top wall 22. The buffer structure 4 has a diversion surface 41 that is aligned with the smoke outlet 3. The diversion surface 41 is connected to the bottom end of the top wall 22 to divert and buffer the flue gas by adjusting the flue gas flow path. By providing the buffer structure 4 and using the diversion surface 41 to adjust the flue gas flow path at the smoke outlet 3 and buffer the flue gas, it can effectively reduce the direct collision and counterflow between the flue gas and the top wall 22 during high-power operation, thereby reducing the smoke exhaust resistance and improving the smoke exhaust efficiency.
[0037] Specifically, in this embodiment, the buffer structure 4 includes a fluid guide 42 provided at the bottom of the top wall 22. The fluid guide 42 is configured to guide the fluid flow. One end of the fluid guide 42 close to the smoke outlet 3, that is, the top end of the fluid guide 42, points to the smoke outlet 3. The side surface of the fluid guide 42 gradually expands from the end close to the smoke outlet 3 and continuously extends to the bottom end of the top wall 22, and the above-mentioned diversion surface 41 is formed along this side surface. Through the above technical solution, during the smoke exhaust process, the top end of the fluid guide 42 can bear the impact of the flue gas at the smoke outlet 3 first, and through the gradually expanding and extending structure of the side surface of the fluid guide 42, the flue gas is dispersed and diverted, so that the originally concentrated jet flue gas is dispersed to form a relatively uniform flow field, and smoothly and smoothly flows along the side surface of the fluid guide 42 to the top wall 22, playing a buffering role, enabling the flue gas to be discharged more smoothly through the smoke outlet 24 of the side cover and improving the smoke exhaust efficiency.
[0038] Of course, the shapes and formation methods of the fluid guide 42 and the diversion surface 41 are diverse. In addition to the above-mentioned implementation structure, the fluid guide 42 can also be a hemispherical structure or other shape structures that can play the same diversion role. Correspondingly, the diversion surface 41 is also a hemispherical surface or other shapes. In this embodiment, the fluid guide 42 is specifically designed as a conical structure, and the diversion surface 41 is designed as a conical surface formed on the side surface of the fluid guide 42. Compared with the above-mentioned hemispherical structure, it has a relatively sharp top end, and reduces unnecessary curved surfaces and transitions, can more directly align with the smoke outlet 3, making the flue gas flow path more clear. Especially when the gas water heater operates at high power, the conical fluid guide 42 can better adapt to and adjust the flow rate and direction of the flue gas, and can better reduce the formation of eddy currents while having a small impact on the flue gas flow rate, improving the smoothness of smoke exhaust.
[0039] To further enhance the buffering effect of the fluid guide 42 on the flue gas, in this embodiment, the buffering structure 4 further includes a first diversion arc surface 43. The first diversion arc surface 43 is closed-loop around the fluid guide 42. The inner end of the first diversion arc surface 43 is connected to the top end of the connecting diversion surface 41 with a downward curvature, while the outer end of the first diversion arc surface 43 is connected to the bottom surface of the connecting top wall 22 with an upward curvature. By setting the first diversion arc surface 43, with the inner and outer ends of the first diversion arc surface 43 being continuously connected to the "diversion surface 41" and the "bottom surface of the top wall 22" respectively with continuous curvature, it can ensure that after the flue gas flows along the diversion surface 41, it can transition from the fluid guide 42 to the top wall 22 more smoothly, reducing the flow resistance of the flue gas and minimizing the direct collision between the flue gas and the top wall 22, thus ensuring the continuous flow of the flue gas.
[0040] Furthermore, to enable the flue gas to transition from the bottom surface of the top wall 22 to the side wall 23 more smoothly, in this embodiment, a second diversion arc surface 44 is connected around the bottom edge of the top wall 22. The second diversion arc surface 44 extends continuously from the bottom edge of the top wall 22 to connect to the top end of the side wall 23. During operation, the flue gas flowing through the top wall 22 can smoothly transition to the side wall 23 along the second diversion arc surface 44 instead of directly hitting the side wall 23, reducing the flow resistance of the flue gas and the possibility of vortex formation, and improving the smoothness and efficiency of smoke exhaust.
[0041] Of course, the formation implementation structure of the fluid guide 42 has diversity. In this embodiment, the fluid guide 42 is integrally formed by a downward depression at the bottom of the top wall 22. Through the one-piece forming design, not only can the smoke exhaust structure be simplified, but also the interface between the fluid guide 42 and the top wall 22 can be reduced, which is beneficial to obtaining a smoother and more unobstructed flue gas flow path and improving the buffering and diversion effect of the fluid guide 42.
[0042] In addition, to improve the versatility of the buffering structure 4, this embodiment provides another formation implementation structure of the fluid guide 42: The fluid guide 42 can be detachably connected to the bottom end of the top wall 22 through connection methods such as bolts, buckles, slots, and adhesives. The first diversion arc surface 43 is integrally formed at the bottom end of the side of the fluid guide 42 and abuts against the bottom surface of the top wall 22. By detachably connecting the fluid guide 42 to the top wall 22, during the actual production process, it allows producers to assemble fluid guides 42 of different specifications according to parameters such as the smoke exhaust power of the product without changing the size structure of the housing 2, thus improving the versatility of the buffering structure 4.
[0043] The following describes another technical problem to be solved by this application: Currently, the gas used for combustion and heat generation in gas water heaters is usually natural gas or liquefied petroleum gas (LPG). During the combustion process, water vapor is generated. The water vapor follows the flue gas and is discharged from the flue gas outlet 3. During the flue gas discharge process, after the flue gas contacts the flue gas discharge cavity 21, it is easy to remain and condense on the inner wall of the flue gas discharge cavity 21 to form liquid water. Since the flue gas outlet 3 extends out of the installation surface 1 and its port height is higher than the installation surface 1, the liquid water condensed on the side wall 23 of the flue gas discharge cavity 21 will flow down to the installation surface 1 and flow out of the flue gas discharge cavity 21 through the gap between the installation surface 1 and the side wall 23, or accumulate and rise to the lowest flue gas outlet 24 of the side wall 23 and be discharged from the flue gas discharge cavity 21 through the flue gas outlet 24, thus preventing the condensed water from flowing back into the gas water heater through the flue gas outlet 3. However, since the top wall 22 is aligned with the flue gas outlet 3, the liquid water condensed on the top wall 22 is easily dripped into the flue gas outlet 3 under the action of its own gravity, resulting in water accumulation inside the flue, increasing the risk of flue corrosion, affecting the normal discharge of the flue gas, and causing poor flue gas discharge or backflow. At the same time, in this embodiment, the design of the buffer structure 4 and the diversion surface 41 in the flue gas discharge cavity 21 solves the technical problem of the collision and counterflow of the flue gas and the top cover and improves the smoothness of the flue gas discharge. However, due to the design of the conical surface structure of the deflector 42, the condensed water formed on the top wall 22 is more likely to accumulate, making the above technical problem more serious.
[0044] In response to this, the improvement of this application lies in: a water removal structure 5 is provided on the cover body 2. The water removal structure 5 is communicated with the bottom end of the top wall 22, and can drain the condensed water formed on the bottom wall surface, thereby reducing the condensed water droplets formed on the surface of the top wall 22 from entering the flue gas outlet 3, ensuring that the gas water heater can operate normally and safely and reliably when used outdoors. And due to the setting of the buffer structure 4, the condensed water formed on the top wall 22 is collected through the diversion surface 41, which can enhance the drainage effect of the water removal structure 5 on the condensed water and prevent some condensed water from dripping into the flue gas outlet 3 without being drained by the water removal structure 5.
[0045] Refer to Figure 5 、 Figure 6 and Figure 7, The first implementation structure of the water removal structure 5: The water removal structure 5 includes a water absorption rope 51 connected to the side wall 23 of the smoke exhaust cavity 21. The front and rear ends of the water absorption rope 51 are a water absorption end 511 and a drainage end 512 respectively. The water absorption end 511 of the water absorption rope 51 extends into the smoke exhaust cavity 21 and fits and extends along the side wall 23 and / or the top wall 22 to connect to the bottom end of the diversion surface 41. The drainage end 512 of the water absorption rope 51 passes through the housing 2 and hangs downward. When the gas water heater is working, the water vapor in the flue gas condenses into water droplets after contacting the bottom of the top wall 22. The water droplets contact the deflector 42 and flow along the diversion surface 41 and finally converge at the bottom end of the diversion surface 41, that is, the tip of the conical structure of the deflector 42. Since the water absorption end 511 extends along the inner wall of the housing 2 to connect to the bottom end of the diversion surface 41, these condensed waters can be absorbed in time. As the water absorption rope 51 continuously accumulates and absorbs the condensed waters, the water in the water absorption rope 51 will flow along the length direction of the water absorption rope 51 and finally drip out of the housing 2 through the drainage end 512 of the water absorption rope 51, so as to continuously absorb the condensed waters on the diversion surface 41 and prevent the condensed water droplets on the diversion surface 41 from falling into the smoke outlet 3. In actual use, according to the drainage efficiency requirements, a single strand or multiple strands of water absorption ropes 51 can be set.
[0046] The way the water absorption rope 51 connects to the bottom end of the diversion surface 41 is diverse. For example, the water absorption rope 51 can be bonded to the inner wall of the housing 2 and / or the deflector 42 in the form of bonding. In this implementation case, a plurality of positioning holes 62 are formed on the inner wall of the smoke exhaust cavity 21 and the deflector 42 protruding towards the inside of the smoke exhaust cavity 21. The water absorption rope 51 is detachably inserted through the positioning holes 62 and then positioned to connect to the bottom end of the diversion surface 41. Through the above technical solution, by forming the positioning holes 62 and the water absorption rope 51 being detachably inserted through the positioning holes 62 for positioning, not only the stable connection between the water absorption rope 51 and the bottom end of the diversion surface 41 is realized, but also the installation is simple, which is convenient for better disassembly of the water absorption rope 51 in the later stage, reduces the maintenance cost, and has strong versatility and adaptability.
[0047] Reference Figure 6 , In this implementation case, the water removal structure 5 further includes a plurality of fixing pieces 63. The fixing piece 63 includes a positioning portion 631 arched like a bridge. Both ends of the positioning portion 631 extend outwards to form connecting portions 632. The positioning holes 62 are formed on the positioning portion 631. When in use, the connecting portions 632 of the fixing piece 63 can be connected to the surface of the deflector 42 and the inner wall of the smoke exhaust cavity 21 by means of fasteners such as screws, or welding or bonding. The inner wall arched like a bridge of the positioning portion 631 cooperates with the surface of the deflector 42 / the inner wall of the smoke exhaust cavity 21 to form the positioning holes 62 for the water absorption rope 51 to pass through and be positioned, thereby reducing the production difficulty of the positioning holes 62.
[0048] In this embodiment, the water absorption rope 51 is made of a water-absorbing material, such as cotton thread or TPE (toughened modified polypropylene). The principle of water absorption and drainage of the water absorption rope 51 is relatively complex and is the result of the combined action of multiple factors (capillary action, cohesion, surface tension, and gravity). Specifically, when one end of the rope is immersed in water, water molecules rise along the gaps and pores inside the rope under the action of capillary force; at the same time, under the action of surface tension, water molecules form a water film on the surface of the rope and spread along the surface of the rope, so that they can move along the length direction of the water absorption rope 51. In addition, since the drainage end 512 extends out of the cover body 2 and droops downward, the water molecules that move out of the cover body 2 will accelerate and move towards the drainage end 512 under the action of their own gravity and finally drain out of the water absorption rope 51.
[0049] Reference Figure 7 , to improve the drainage efficiency of the water absorption rope 51 and enable the water absorption rope 51 to maintain a relatively stable drainage capacity, in this embodiment, a water dispersing body 64 that abuts against the drainage end 512 of the water absorption rope 51 is provided on the outer wall of the cover body 2. During operation, condensed water moves from the water absorption end 511 to the drainage end 512 under the action of factors such as capillary action, surface tension, and gravity, and forms water droplets at the drainage end 512. After the water droplets come into contact with the water dispersing body 64, the surface tension of the water droplets will be damaged, so that they will flow along the surface of the water dispersing body 64, thereby accelerating the discharge from the drainage end 512 of the water absorption rope 51.
[0050] In this embodiment, the water dispersing body 64 is preferably made of porous ceramics, which are formed by high-temperature calcination of metal oxides, silicon dioxide, silicon carbide, etc. It has good stability and durability and is suitable for long-term outdoor use. Moreover, the porous ceramics have a high porosity and good water permeability, can quickly absorb and disperse condensed water, damage the surface tension of the condensed water at the drainage end 512, and accelerate the discharge of the condensed water from the drainage end 512.
[0051] In addition, to slow down the aging of the water absorption rope 51 and improve the service life of the water absorption rope 51, in this embodiment, an isolation cylinder 65 with an open bottom is provided outside the cover body 2. The drainage end 512 of the water absorption rope 51 passes through the cover body 2 and extends into the isolation cylinder 65. During use, the isolation cylinder 65 can shield the part of the water absorption rope 51 that passes through the cover body 2, isolate the water absorption rope 51 from the external environment, and prevent the water absorption rope 51 from accelerating aging due to factors such as sunlight, mechanical damage, and temperature difference changes. Moreover, a relatively humid environment can be maintained inside the isolation cylinder 65, which helps to keep the water absorption rope 51 in a moist state and improve its water absorption efficiency and service life.
[0052] Reference Figure 8, in addition to the water absorption rope 51 described above, this embodiment also provides another implementation structure of the water removal structure 5: the water removal structure 5 includes a drainage rod 66 and a drain port 67 provided on the cover body 2. The drain port 67 is positioned below the diversion surface 41. One end of the drainage rod 66 is connected to the bottom end of the diversion surface 41, that is, the tip of the conical structure of the fluid guide body 42. The other end of the drainage rod 66 extends obliquely downward to the drain port 67 and communicates with the drain port 67, and is used to drain the condensed water collected at the bottom end of the diversion surface 41 into the drain port 67. When the gas water heater is working, the water vapor in the flue gas condenses into water droplets after contacting the bottom of the top wall 22. When the water droplets contact the fluid guide body 42 and flow along the diversion surface 41 and finally gather at the bottom end of the diversion surface 41, due to the drainage rod 66 being provided to connect the bottom end of the diversion surface 41 and the drain port 67, the collected condensed water will quickly flow to the surface of the drainage rod 66 and, under the action of surface tension and adsorption force, flow along the surface of the drainage rod 66 and finally flow into the drain port 67, and is discharged from the smoke exhaust cavity 21 through the drain port 67, thereby preventing the condensed water droplets on the diversion surface 41 from falling into the smoke outlet 3.
[0053] In this embodiment, the drain port 67 is the smoke exhaust port 24 provided on the side wall 23 and with a height lower than the bottom end of the diversion surface 41. In this way, there is no need to additionally provide a drain port 67, which can simplify the structure. And since both the flue gas and the condensed water are discharged through the smoke exhaust port 24, during the smoke exhaust process, the flue gas flow passing through the smoke exhaust port 24 can accelerate the condensed water on the drainage rod 66 and speed up the discharge of the condensed water.
[0054] The above two implementation structures of the water removal structure 5 each have their own advantages and disadvantages. For example, although the drainage effect of the water absorption rope 51 is lower than that of the drainage rod 66, compared with the drainage rod 66, since the water absorption rope 51 is adhesively connected to the fluid guide body 42 and the inner wall of the cover body 2 and is arranged along the flow path of the flue gas, it will not cause a great obstruction to the flue gas discharged from the smoke outlet 3. Therefore, in the actual production process, the corresponding water removal structure 5 can be preferentially selected according to the working conditions and specific models of the gas water heater.
[0055] Embodiment Two:
[0056] Reference Figure 1 , Figure 2 , an outdoor gas water heater, which includes a housing 7. A burner, a heat exchanger and a smoke collecting device are arranged in the housing 7, and it further includes a smoke exhaust structure as in Embodiment One. The installation surface 1 and the smoke outlet 3 of the smoke exhaust structure are formed on the housing 7.
[0057] Note that the above is only the preferred embodiment of the present utility model and the applied technical principles. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in detail through the above embodiments, the present utility model is not limited to the above embodiments only. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.
Claims
1. A smoke exhaust structure, characterized in that: include: A mounting surface (1) on which a smoke outlet (3) is provided; A cover body (2) connected to the mounting surface (1) and forming a smoke exhaust cavity (21) connected to the smoke outlet (3); The smoke exhaust cavity (21) comprises a top wall (22) and a side wall (23) surrounding and connecting the edge of the top wall (22); The top wall (22) is positioned above the smoke outlet (3) and aligned with the smoke outlet (3); The side wall (23) is provided with a smoke exhaust port (24) for exhausting smoke; The cover body (2) is provided with a water removal structure (5) for drainage to reduce condensed water droplets on the surface of the top wall (22) from falling into the smoke outlet (3), and the water removal structure (5) comprises a water absorption rope (51) connected to the side wall (23), one end of the water absorption rope (51) is attached to and extends along the inner wall of the smoke exhaust cavity (21) to be connected to the bottom end of the top wall (22), and the other end of the water absorption rope (51) passes through the side wall (23) and extends to the outside of the cover body (2).
2. The smoke exhaust structure according to claim 1, characterized in that: The top wall (22) is provided with a guide surface (41) for collecting and accumulating condensed water, and the water absorption rope (51) is extended and connected to the bottom end of the guide surface (41).
3. The smoke exhaust structure according to claim 2, characterized in that: The top wall (22) is provided with a flow guide (42); the flow guide (42) is configured to guide the flow of the fluid (42), with its top end pointing toward the smoke outlet (3), and the side surface of the flow guide (42) gradually expanding from one end thereof close to the smoke outlet (3) and continuously extending to the bottom end of the top wall, and the flow guide surface (41) is formed along this side surface.
4. The smoke exhaust structure according to claim 3, characterized in that: The bottom of the top wall (22) is recessed downward to integrally form the flow guide (42).
5. The smoke exhaust structure according to any one of claims 1 to 4, characterized in that: The side wall (23) and / or the top wall (22) protrude toward the interior of the smoke exhaust chamber (21) to form a plurality of positioning holes (62), and the water absorption rope (51) is detachably inserted and positioned in the positioning holes (62).
6. The smoke exhaust structure according to claim 5, characterized in that: The dewatering structure (5) further comprises a plurality of fixing plates (63), wherein the fixing plates (63) comprise a positioning portion (631) that is arched in a bridge shape, wherein both ends of the positioning portion (631) extend outward to form a connecting portion (632) for connecting to the top wall (22) and / or the side wall (23), and the positioning hole (62) is formed on the positioning portion (631).
7. The smoke exhaust structure according to claim 5, characterized in that: The outer wall of the cover body (2) is provided with a water dispersion body (64), and the water dispersion body (64) abuts against one end of the water absorption rope (51) passing through the smoke exhaust cavity (21), and is used to destroy the surface tension of condensed water on the water absorption rope (51).
8. The smoke exhaust structure according to claim 7, characterized in that: The water dispersion body (64) is a porous ceramic block.
9. The smoke exhaust structure according to claim 5, characterized in that: An insulating tube (65) with an open bottom is arranged outside the cover body (2), and one end of the water-absorbing rope (51) passes through the cover body (2) and extends into the insulating tube (65).
10. An outdoor gas water heater, characterized in that: The invention comprises a casing (7), wherein a burner, a heat exchanger and a smoke collecting device are arranged inside the casing (7), and further comprises a smoke exhaust structure according to any one of claims 1 to 9.