Smoke exhaust structure and outdoor gas water heater
By setting a water removal structure in the smoke exhaust structure and using a drainage rod and a drain outlet to drain the condensed water to the drain outlet, the problem of condensed water dripping into the smoke exhaust outlet is solved, and the normal operation of the gas water heater and safe and reliable smoke exhaust are achieved.
Patent Information
- Application Number
- CN202421857447.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-16
- 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 droplets that fall 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 drainage rod and a drain port, and the condensed water is drained to the drain port through the guide surface and the drainage surface to prevent the condensed water 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 CN222881391U_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 energy. It generates heat by burning gas, which in turn heats water to provide hot water for homes or commercial places. When a gas water heater is used as an outdoor unit, the smoke exhaust port of its smoke collection device is prone to water ingress and dust accumulation. To ensure the normal operation and safety of the equipment, most existing outdoor gas water heaters are equipped with a waterproof and dustproof smoke exhaust hood 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 being formed in the cover body. When in use, the bottom cover is installed on 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 smoke exhaust port is covered by the cover body to prevent dust and rain, and the smoke generated by the gas water heater enters the smoke exhaust hood through the smoke exhaust port and is finally discharged outward through the window on the side wall of the cover body, thereby ensuring normal smoke exhaust of the gas water heater.
[0004] However, the existing outdoor gas water heaters have the following defects when in use: the gas used to generate heat in current gas water heaters is usually natural gas or liquefied petroleum gas (LPG), which produces water vapor during combustion and is discharged along 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 on the top of the inner wall of the smoke exhaust hood. The liquid water easily drips into the smoke exhaust port under the action of its own gravity, causing water accumulation inside the flue, increasing the risk of smoke corrosion, affecting the normal discharge of the smoke, and causing poor smoke exhaust or backflow. Utility Model Content
[0005] The utility model aims to provide a smoke exhaust structure and an outdoor gas water heater to solve the above problems.
[0006] In order to achieve the above objectives, the following technical solutions are provided:
[0007] In the first aspect, the utility model provides a smoke exhaust structure, comprising: a mounting surface, on which a smoke outlet is arranged; a cover body, which is connected to the mounting surface and forms a smoke exhaust cavity connected to the smoke outlet; the smoke exhaust cavity has a top wall and a side wall surrounding and connected to the edge of the top wall; the top wall is positioned above the smoke outlet and aligned with the smoke outlet; the side wall is provided with a smoke exhaust cavity for exhausting smoke; the cover body is provided with a dewatering structure for drainage to reduce condensed water droplets on the top wall surface from falling into the smoke outlet, the dewatering structure comprises a drainage rod and a drainage outlet arranged on the side wall, one end of the drainage rod is connected to the bottom end of the top wall, and the other end of the drainage rod extends obliquely downward to be connected to the drainage outlet.
[0008] As an optional solution of the smoke exhaust structure provided by the utility model, the top wall is provided with a guide surface for collecting and accumulating condensed water, and the guide rod is connected to the bottom end of the guide surface.
[0009] As an optional solution of the smoke exhaust structure provided by the utility model, the top wall is provided with a guide body with a conical structure, the conical top end of the guide body is aligned and points to the smoke outlet, the side surface of the guide body extends from the conical top end of the guide body to the bottom end of the top wall, and the guide surface is formed on the side surface of the guide body.
[0010] As an optional solution of the smoke exhaust structure provided by the utility model, the bottom of the top wall is recessed downward to integrally form the flow guide.
[0011] As an optional solution of the smoke exhaust structure provided by the utility model, a drainage surface is formed at the bottom of one side of the drainage rod close to the smoke outlet, the drainage surface is connected to the bottom end of the top wall, and the drainage surface extends integrally from the bottom end of the top wall to the drain outlet, and the cross-section of the drainage surface is an arc shape.
[0012] As an optional solution of the smoke exhaust structure provided by the utility model, the drainage surface is inwardly recessed to form a plurality of drainage grooves arranged at intervals, and the drainage grooves extend integrally from the bottom end of the top wall to be connected to the drainage port.
[0013] As an optional solution for the smoke exhaust structure provided by the utility model, the top end of the drainage rod close to the top wall is inwardly recessed to form a water guide groove, and the water guide groove extends integrally from the bottom end of the top wall to connect to the drainage port.
[0014] As an optional solution of the smoke exhaust structure provided by the utility model, the drainage rod is detachably connected to the cover body.
[0015] As an optional solution of the smoke exhaust structure provided by the utility model, the top wall is provided with a mounting hole, one end of the drainage rod connected to the top wall is provided with a plug-in portion, the outer wall of the plug-in portion is sleeved with an elastic sleeve, and the plug-in portion is elastically plugged into the mounting hole through the elastic sleeve.
[0016] In a second aspect, the utility model further provides an outdoor gas water heater, comprising a casing, wherein a burner, a heat exchanger and a smoke collecting device are arranged in the casing, and also comprises the smoke exhaust structure as described above.
[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: a water removal structure is provided on the cover body, and the condensed water formed on the bottom wall surface is drained through the water removal structure, thereby reducing the condensed water droplets formed on the top wall surface from entering the smoke outlet, thereby ensuring that the gas water heater can operate normally and safely and reliably when used outdoors. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.
[0019] Figure 1 This is a schematic diagram of the smoke exhaust structure. Figure 1 ;
[0020] Figure 2 This is a schematic diagram of the smoke exhaust structure. Figure 2 ;
[0021] Figure 3 It is a structural schematic diagram when the hood of the smoke exhaust structure is not provided with a water removal structure;
[0022] Figure 4 is a cross-sectional schematic diagram of the smoke exhaust structure;
[0023] Figure 5 This is a schematic diagram of the structure when the hood body in the smoke exhaust structure is equipped with a water removal structure Figure 1 ;
[0024] Figure 6 This is a schematic diagram of the structure when the hood body in the smoke exhaust structure is equipped with a water removal structure Figure 2 ;
[0025] Figure 7 It is a schematic diagram of the structure of the water dispersion body;
[0026] Figure 8 This is a schematic diagram of the structure when the hood body in the smoke exhaust structure is equipped with a water removal structure Figure 2 ;
[0027] Fig. 9 is a schematic cross-sectional view of a cross section of a drainage rod;
[0028] Fig.10 It is a cross-sectional schematic diagram of the cover body.
[0029] In the figure:
[0030] 1. Installation surface; 2. Cover body; 21. Smoke exhaust cavity; 22. Top wall; 23. Side wall; 24. Smoke exhaust port;
[0031] 25. Mounting hole; 3. Smoke outlet; 4. Buffer structure; 41. Guide surface; 42. Guide body; 43. First guide arc surface; 44. Second guide arc surface; 5. Water removal structure; 51. Water absorption rope; 511. Water absorption end; 512. Water discharge end; 62. Positioning hole; 63. Fixing plate; 631. Positioning part; 632. Connecting part; 64. Water dispersion body; 65. Isolation tube; 66. Drainage rod; 661. Drainage surface; 662. Drainage groove; 663. Water guide groove; 664. Connecting part; 665. Elastic sleeve; 67. Drainage outlet; 7. Casing. DETAILED DESCRIPTION
[0032] 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.
[0033] 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.
[0034] 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.
[0035] Implementation case 1:
[0036] refer to Figure 1 to Figure 4A 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.
[0037] During operation, the smoke outlet 3 is connected to the smoke exhaust end of the gas water heater, and the cover body 2 is connected to cover the smoke outlet 3 to prevent dust and rain. The smoke generated by the gas water heater enters the smoke exhaust cavity 21 through the smoke outlet 3 and is finally discharged outward through the smoke exhaust port 24 on the side wall 23, thereby ensuring the normal smoke exhaust of the gas water heater.
[0038] Another improvement of the present application is that a buffer structure 4 is provided at the bottom end of the top wall 22, and the buffer structure 4 has a guide surface 41 aligned with the smoke outlet 3, and the guide surface 41 is connected to the bottom end of the top wall 22 to adjust the smoke flow path and guide and buffer the smoke. By providing the buffer structure 4 and using the guide surface 41 to adjust the smoke flow path of the smoke outlet 3 and buffer the smoke, the direct collision between the smoke and the top wall 22 during high-power operation can be effectively reduced, thereby reducing the smoke exhaust resistance and improving the smoke exhaust efficiency.
[0039] Specifically, in this embodiment, the buffer structure 4 includes a guide body 42 arranged at the bottom of the top wall 22, and the guide body 42 is configured to guide the flow of fluid, and the end of the guide body 42 is close to the smoke outlet 3, that is, the top of the guide body 42 points to the smoke outlet 3, and the side of the guide body 42 gradually expands from the end of the guide body 42 close to the smoke outlet 3 and continuously extends to the bottom of the top wall 22, and the above-mentioned guide surface 41 is formed along this side. Through the above-mentioned technical scheme, during the smoke exhaust process, the top of the guide body 42 can first bear the impact of the smoke from the smoke outlet 3, and through the structure of the gradual expansion and extension of the side of the guide body 42, the smoke is dispersed and guided, so that the originally concentrated smoke is dispersed to form a more uniform flow field, and flows steadily and smoothly along the side of the guide body 42 to the top wall 22, playing a buffering role, so that the smoke can be discharged more smoothly through the smoke outlet 24 of the side cover, thereby improving the smoke exhaust efficiency.
[0040] Of course, the shapes and formation methods of the guide body 42 and the guide surface 41 are diverse. In addition to the above-mentioned implementation structure, the guide body 42 can also be a hemispherical structure or other shape structures that can play the same guiding role. Correspondingly, the guide surface 41 is also a hemispherical surface or other shapes. In this implementation case, the guide body 42 is specifically designed as a conical structure, and the guide surface 41 is designed as a conical surface formed on the side of the guide body 42. Compared with the above-mentioned hemispherical structure, it has a sharper top and reduces unnecessary curved surfaces and transitions. It can be more directly aligned with the smoke outlet 3, making the flow path of the smoke clearer. Especially when the gas water heater is working at high power, the guide body 42 with a conical structure can better adapt to and adjust the flow rate and direction of the smoke, and while affecting the smoke flow rate to a lesser extent, it can better reduce the formation of vortices and improve the smoothness of smoke exhaust.
[0041] In order to further enhance the buffering effect of the guide body 42 on the smoke, in this embodiment, the buffer structure 4 also includes a first guide arc surface 43, the first guide arc surface 43 is closed around the guide body 42, the inner end of the first guide arc surface 43 is connected to the top of the guide surface 41 with a downward curvature, and the outer end of the first guide arc surface 43 is connected to the bottom surface of the top wall 22 with an upward curvature. By setting the first guide arc surface 43, the inner and outer ends of the first guide arc surface 43 are connected to the "guide surface 41" and the "bottom surface of the top wall 22" with a continuous curvature, which can ensure that the smoke can more smoothly transition from the guide body 42 to the top wall 22 after flowing along the guide surface 41, reducing the smoke flow resistance, while reducing the direct collision between the smoke and the top wall 22, ensuring the continuous flow of the smoke.
[0042] Furthermore, in order to make the smoke transition more smoothly from the bottom surface of the top wall 22 to the side wall 23, in this embodiment, the bottom edge of the top wall 22 is surrounded by a second guide arc surface 44, and the second guide arc surface 44 extends continuously from the bottom edge curvature of the top wall 22 to connect to the top of the side wall 23. During operation, the smoke flowing through the top wall 22 can smoothly transition to the side wall 23 along the second guide arc surface 44, instead of directly hitting the side wall 23, reducing the flow resistance of the smoke and the possibility of vortex formation, thereby improving the smoothness and efficiency of smoke exhaust.
[0043] Of course, the formation implementation structure of the flow guide 42 is diverse. In this implementation case, the flow guide 42 is formed as an integral unit by a downward depression at the bottom of the top wall 22. The one-piece molding design can not only simplify the smoke exhaust structure, but also reduce the interface between the flow guide 42 and the top wall 22, which is conducive to obtaining a smoother and smoother smoke flow path, thereby improving the buffering and diversion effect of the flow guide 42.
[0044] In addition, in order to improve the versatility of the buffer structure 4, this embodiment provides another implementation structure for forming the flow guide 42: the flow guide 42 can be detachably connected to the bottom end of the top wall 22 by bolts, buckles, slots, bonding, etc., and the first flow guide arc surface 43 is integrally formed at the bottom end of the side of the flow guide 42 and abuts against the bottom surface of the top wall 22. By detachably connecting the flow guide 42 to the top wall 22, the actual production process allows the manufacturer to assemble flow guides 42 of different specifications according to parameters such as product smoke exhaust power without changing the size structure of the cover body 2, thereby improving the versatility of the buffer structure 4.
[0045] Another technical problem to be solved by the present application is introduced as follows: Currently, the gas used to generate heat in a gas water heater is usually natural gas or liquefied petroleum gas (LPG). The combustion process will generate water vapor, which will be discharged from the smoke outlet 3 together with the smoke. During the smoke exhaust process, after the smoke contacts the smoke exhaust cavity 21, it is easy for the smoke to condense on the inner wall of the smoke exhaust cavity 21 to form liquid water. Since the smoke outlet 3 extends out of the mounting surface 1, the height of the port is higher than the mounting surface 1. The liquid water formed by the condensation on the side wall 23 of the smoke exhaust cavity 21 will flow down to the mounting surface 1 and The condensed water flows out of the smoke exhaust cavity 21 through the gap between the mounting surface 1 and the side wall 23, or accumulates and rises to the smoke exhaust port 24 at the lowest position of the side wall 23, and is discharged from the smoke exhaust cavity 21 through the smoke exhaust port 24, thereby preventing the condensed water from flowing back into the gas water heater through the smoke outlet 3. However, since the top wall 22 is aligned with the smoke outlet 3, the liquid water condensed on the top wall 22 can easily drip into the smoke outlet 3 under the action of its own gravity, thereby causing water accumulation inside the flue, increasing the risk of flue corrosion, affecting the normal discharge of flue gas, and causing poor smoke exhaust or backflow. At the same time, the design of the buffer structure 4 and the guide surface 41 in the smoke exhaust cavity 21 of this embodiment solves the technical problem of the collision and impact between the smoke and the top wall 22 and improving the smoothness of smoke exhaust. However, at the same time, the design of the conical structure of the guide body 42 and the guide surface 41 makes it easier for the condensed water formed on the top wall 22 to be gathered, so that the condensed water can be concentrated and drip into the smoke outlet 3, making the above technical problems more serious.
[0046] In this regard, the improvement of the present application is that: a water removal structure 5 is provided on the cover body 2, and the water removal structure 5 is connected to the bottom end of the top wall 22, and can drain the condensed water formed on the surface of the top wall 22, thereby reducing the condensed water droplets formed on the surface of the top wall 22 from entering the smoke 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 guide surface 41, which can enhance the drainage effect of the water removal structure 5 on the condensed water, and prevent part of the condensed water from dripping into the smoke outlet 3 without being drained by the water removal structure 5.
[0047] 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 chamber 21, the front and rear ends of the water absorption rope 51 are respectively a water absorption end 511 and a drainage end 512, the water absorption end 511 of the water absorption rope 51 extends into the smoke exhaust chamber 21, and fits and extends along the side wall 23 and / or the top wall 22 to be connected to the bottom end of the guide surface 41, and the drainage end 512 of the water absorption rope 51 passes through the cover body 2 and hangs downward. When the gas water heater is working, the water vapor in the flue gas condenses to form water droplets after contacting the bottom of the top wall 22. The water droplets contact the guide body 42 and flow along the guide surface 41 and finally gather at the bottom end of the guide surface 41, that is, the tip of the conical structure of the guide body 42. Since the water absorption end 511 extends along the inner wall of the cover body 2 and is connected to the bottom end of the guide surface 41, it can absorb these condensed water in time. As the water absorption rope 51 continuously accumulates and absorbs condensed water, the moisture in the water absorption rope 51 will flow along the length direction of the water absorption rope 51, and finally drip out of the cover body 2 through the drainage end 512 of the water absorption rope 51, so that the condensed water on the guide surface 41 can be continuously absorbed to prevent the condensed water on the guide surface 41 from falling into the smoke outlet 3. In actual use, a single strand or multiple strands of water absorption rope 51 can be set according to the drainage efficiency requirements.
[0048] There are various ways to connect the water-absorbing rope 51 to the bottom of the guide surface 41. For example, the water-absorbing rope 51 can be bonded to the inner wall of the cover body 2 and / or the guide body 42 by bonding. In this embodiment, the inner wall of the smoke exhaust cavity 21 and the guide body 42 are protruded toward the inside of the smoke exhaust cavity 21 to form a plurality of positioning holes 62. The water-absorbing rope 51 can be detachably inserted through the positioning holes 62 to be positioned and connected to the bottom of the guide surface 41. Through the above technical solution, by forming the positioning holes 62, the water-absorbing rope 51 can be detachably inserted through the positioning holes 62 for positioning, which not only realizes the stable connection between the water-absorbing rope 51 and the bottom of the guide surface 41, but also is easy to install, which is convenient for better disassembly of the water-absorbing rope 51 in the later stage, reduces maintenance costs, and has strong versatility and adaptability.
[0049] In this embodiment, the water removal structure 5 also includes a plurality of fixing plates 63, the fixing plates 63 include a positioning portion 631 with a bridge-shaped arch, both ends of the positioning portion 631 extend outward to form a connecting portion 632, and a positioning hole 62 is formed on the positioning portion 631. When in use, the connecting portion 632 of the fixing plate 63 can be connected to the surface of the guide body 42 and the inner wall of the smoke exhaust chamber 21 by fasteners such as screws or welding or bonding. The positioning hole 62 is formed by the inner wall of the bridge-shaped arch of the positioning portion 631 and the surface of the guide body 42 / the inner wall of the smoke exhaust chamber 21 for the water absorption rope 51 to pass through and position, thereby reducing the production difficulty of the positioning hole 62.
[0050] In this embodiment, the water-absorbing 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-absorbing rope 51 is relatively complicated, and is the result of the combined action of multiple factors (capillary phenomenon, cohesive force, 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 layer of water film on the surface of the rope and expand along the surface of the rope, so that they can move along the length direction of the water-absorbing rope 51. In addition, since the drainage end 512 extends out of the cover body 2 and hangs downward, the water molecules that move out of the cover body 2 will accelerate toward the drainage end 512 under the action of their own gravity, and finally be discharged from the water-absorbing rope 51.
[0051] In order 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 dispersion body 64 is provided on the outer wall of the cover body 2 to abut against the drainage end 512 of the water absorption rope 51. During operation, condensed water moves from the water absorption end 511 to the drainage end 512 under the action of capillary action, surface tension, gravity and other factors, and gathers at the drainage end 512 to form water droplets. After the water droplets contact the water dispersion body 64, the surface tension of the water droplets will be destroyed, so that they will flow along the surface of the water dispersion body 64, thereby accelerating the drainage of the drainage end 512 of the water absorption rope 51.
[0052] In this embodiment, the water dispersion body 64 is preferably made of porous ceramics, which are made of metal oxides, silicon dioxide, silicon carbide, etc. through high-temperature calcination. They have good stability and durability and are suitable for long-term outdoor use. The porous ceramics have a high porosity and good water permeability, and can quickly absorb and disperse condensed water, destroy the surface tension of the condensed water at the drainage end 512, and accelerate the discharge of condensed water from the drainage end 512.
[0053] In addition, in order to slow down the aging of the water-absorbing rope 51 and increase the service life of the water-absorbing rope 51, in this embodiment, an insulating tube 65 with an open bottom is provided on the outside of the cover body 2, and the drainage end 512 of the water-absorbing rope 51 passes through the cover body 2 and extends into the insulating tube 65. When in use, the insulating tube 65 can block the part of the water-absorbing rope 51 passing through the cover body 2, thereby isolating the water-absorbing rope 51 from the external environment, thereby preventing the water-absorbing rope 51 from being accelerated in aging due to factors such as sunlight, mechanical damage, and temperature changes, and the inside of the insulating tube 65 can maintain a relatively humid environment, which helps to maintain the moist state of the water-absorbing rope 51 and improve its water absorption efficiency and service life.
[0054] refer to Figure 8 , Fig. 9 and Fig.10In addition to the above-mentioned water-absorbing rope 51, this embodiment case also provides another embodiment structure of the water removal structure 5: the water removal structure 5 includes a drainage rod 66 and a drain port 67 arranged on the cover body 2, the drain port 67 is positioned below the guide surface 41, one end of the drainage rod 66 is connected to the bottom end of the guide surface 41, that is, the tip of the conical structure of the guide body 42, and the other end of the drainage rod 66 extends obliquely downward to the drain port 67 and is connected to the drain port 67, so as to drain the condensed water gathered at the bottom end of the guide surface 41 into the drain port 67. When the gas water heater is working, the water vapor in the flue gas condenses to form water droplets after contacting the bottom of the top wall 22. When the water droplets contact the guide body 42 and flow along the guide surface 41 and finally gather at the bottom end of the guide surface 41, since the guide rod 66 is arranged to connect the bottom end of the guide surface 41 and the drain outlet 67, the gathered condensed water will quickly flow to the surface of the guide rod 66. Under the action of surface tension and adsorption force, the condensed water will tend to form a liquid film on the surface of the guide rod 66, flow along the surface of the guide rod 66, and finally flow into the drain outlet 67, and be discharged from the smoke exhaust chamber 21 through the drain outlet 67, thereby preventing the condensed water droplets on the guide surface 41 from falling into the smoke outlet 3.
[0055] In this embodiment, the drain outlet 67 is a smoke exhaust outlet 24 which is arranged on the side wall 23 and has a height lower than the bottom end of the guide surface 41. In this way, there is no need to set up an additional drain outlet 67, which can simplify the structure. Moreover, since both the smoke and condensed water are discharged through the smoke exhaust outlet 24, the condensed water on the drainage rod 66 can be accelerated by the smoke airflow flowing through the smoke exhaust outlet 24 during the smoke exhaust process, thereby speeding up the discharge of the condensed water.
[0056] In this embodiment, a drainage surface 661 is formed at the bottom of one end of the drainage rod 66 near the smoke outlet 3, one end of the drainage surface 661 is connected to the bottom end of the top wall 22, that is, connected to the bottom end of the conical structure of the guide body 42, and the other end of the drainage surface 661 extends from the bottom end of the top wall 22 to the drain port 67, and the cross section of the drainage surface 661 is set to be an arc shape. When the drainage rod 66 drains the condensed water, due to gravity, the condensed water usually accumulates at the bottom of the drainage rod 66, that is, accumulates at the bottom of one end of the drainage rod 66 near the smoke outlet 3. By setting the arc-shaped drainage surface 661 at the bottom of the drainage rod 66, not only can the condensed water be provided with a smoother liquid flow, the resistance in the flow of the condensed water is reduced, and the formation of turbulence is reduced, but also the arc-shaped cross section can increase the surface area of the drainage surface 661, which is helpful for more effective collection and guidance of the condensed water.
[0057] To further increase the drainage capacity of the drainage rod 66 , in this embodiment, the drainage surface 661 is recessed inward to form a plurality of drainage grooves 662 arranged at intervals, and the drainage grooves 662 extend integrally from the bottom end of the top wall 22 to connect to the drain port 67 . Since the drainage surface 661 is recessed to form the drainage groove 662, the area of the drainage surface 661 is greatly increased, thereby improving the carrying capacity of the drainage surface 661 for condensed water, so that the drainage surface 661 can drain more condensed water per unit time, thereby improving the drainage efficiency. In addition, another advantage of providing the drainage groove 662 is that when the condensed water flows from the top wall 22 along the guide body 42 to the drainage rod 66, the condensed water can be dispersed into and fill the drainage groove 662. When the drainage groove 662 is filled with condensed water, due to the surface tension characteristics of water, a layer of water film will be formed at the notch of the drainage groove 662. This layer of water film can further attract and pull the subsequent condensed water, so that the condensed water can flow more stably along the drainage groove 662 and the drainage surface 661, reducing the possibility of direct dripping due to gravity. Moreover, the existence of the water film can provide a smooth flow surface for the subsequent condensed water, reducing the direct contact and friction resistance between the drainage surface 661, helping the condensed water to flow faster, thereby improving the overall drainage efficiency.
[0058] Considering that the drainage body mainly relies on the drainage surface 661 at the bottom to drain during the drainage process, when the gas water heater works at high power or the ambient temperature is low, the amount of condensed water formed on the top wall 22 per unit time will be large, thereby exceeding the upper limit of the load of the drainage surface 661, that is, when the water volume is too large, some condensed water cannot be adsorbed on the drainage surface 661 by surface tension and directly drips into the smoke outlet 3. In this regard, in this embodiment, the top of one end of the drainage rod 66 close to the top wall 22 is inwardly concave to form a water guide groove 663, and the water guide groove 663 extends from the bottom end of the top wall 22 to the drain outlet 67. By forming a water guide groove 663 at the top of the drainage body, the top of the drainage body also has drainage capability. When the amount of condensed water is large, part of the condensed water can directly avoid the drainage surface 661 and flow into the water guide groove 663. Instead of relying on surface tension, it flows into the drain outlet 67 under the support of the water guide groove 663, thereby alleviating the drainage pressure of the drainage surface 661 and reducing the occurrence of condensed water dripping.
[0059] When the gas water heater uses liquefied petroleum gas to work, the flue gas generated during its combustion will contain impurity particles. These particulate impurities will be adsorbed on the drainage rod 66 during the flow of the flue gas, thereby affecting the drainage effect of the drainage rod 66. In this regard, in order to facilitate the cleaning and replacement of the drainage rod 66, in this embodiment, the drainage rod 66 is connected to the top wall 22 of the smoke exhaust chamber 21 in a detachable manner.
[0060] Specifically, the top wall 22 is provided with a mounting hole 25, and the mounting hole 25 passes through the top of the conical structure of the guide body 42. The drainage rod 66 is connected to one end of the top wall 22, that is, the end of the guide body connected to the guide body 42 is provided with a plug-in portion 664, and the outer wall of the plug-in portion 664 is provided with an elastic sleeve 665. The installation of the drainage rod 66 can be completed by elastically plugging the plug-in portion 664 together with the elastic sleeve 665 into the mounting hole 25. By setting the elastic sleeve 665 to elastically plug the mounting hole 25, the drainage rod 66 is more convenient to disassemble and install, and the elastic sleeve 665 can play a certain role in buffering and shock absorbing, reducing the influence of the mechanical vibration of the gas water heater on the drainage effect of the drainage rod 66. In this embodiment, the elastic sleeve 665 is made of rubber, and the drainage rod 66 can be made of quartz, stainless steel, silicone, rubber and other materials.
[0061] The implementation structures of the above two water removal structures 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 closely connected to the 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 large 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 selected according to the working condition and specific model of the gas water heater.
[0062] Implementation case 2:
[0063] refer to Figure 1 A gas water heater for outdoor use includes a casing 7, in which a burner, a heat exchanger and a smoke collecting device are arranged, and also includes a smoke exhaust structure as in the implementation case 1, and a mounting surface 1 and a smoke outlet 3 of the smoke exhaust structure are formed on the casing 7.
[0064] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention 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 drainage rod (66) and a drainage outlet (67) arranged on the side wall (23), one end of the drainage rod (66) is connected to the bottom end of the top wall (22), and the other end of the drainage rod (66) extends obliquely downward to be connected to the drainage outlet (67).
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 guide rod (66) is 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 (22), 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: A drainage surface (661) is formed at the bottom of one end of the drainage rod (66) close to the smoke outlet (3); the drainage surface (661) is connected to the bottom end of the top wall (22); and the drainage surface (661) extends integrally from the bottom end of the top wall (22) to be connected to the drain outlet (67); and the cross-section of the drainage surface (661) is arc-shaped.
6. The smoke exhaust structure according to claim 5, characterized in that: The drainage surface (661) is inwardly recessed to form a plurality of drainage grooves (662) arranged at intervals, and the drainage grooves (662) integrally extend from the bottom end of the top wall (22) to communicate with the drainage outlet (67).
7. The smoke exhaust structure according to claim 5, characterized in that: The top of one end of the drainage rod (66) close to the top wall (22) is inwardly recessed to form a water guide groove (663), and the water guide groove (663) extends integrally from the bottom end of the top wall (22) to be connected to the drainage outlet (67).
8. The smoke exhaust structure according to claim 5, characterized in that: The drainage rod (66) is detachably connected to the cover body (2).
9. The smoke exhaust structure according to claim 1, characterized in that: The top wall (22) is provided with a mounting hole (25); one end of the drainage rod (66) connected to the top wall (22) is provided with a plug-in portion (664); an outer wall of the plug-in portion (664) is sleeved with an elastic sleeve (665); and the plug-in portion (664) is elastically plugged into the mounting hole (25) through the elastic sleeve (665).
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.