Smoke exhaust device and gas heating equipment
By installing drain outlets and baffles on the exhaust pipe and air inlet pipe, the problem of rainwater backflow in gas heating equipment is solved, achieving better waterproof performance and ease of maintenance.
Patent Information
- Application Number
- CN202422707452.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-06
AI Technical Summary
In existing gas heating equipment, rainwater can easily flow back into the equipment from the air inlet pipe or exhaust pipe, causing corrosion of internal sheet metal parts or short circuits in electrical components.
Drainage outlets are installed on the exhaust pipe and air inlet pipe, and baffles, including a first baffle and a second baffle, are installed at the drainage outlets to form a guide channel to prevent rainwater backflow and guide rainwater to drain quickly.
It effectively prevents or reduces rainwater backflow, lowers the risk of corrosion of internal sheet metal parts and short circuits in electrical components, and improves the waterproof performance and ease of maintenance of the equipment.
Smart Images
Figure CN223499797U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a smoke exhaust device and a gas heating device. Background Technology
[0002] In existing technologies, gas heating equipment such as gas water heaters typically have their exhaust pipes and / or inlet pipes connected to the outside. Existing gas water heaters suffer from rainwater backflowing into the water heater from the inlet or exhaust pipes, leading to corrosion of internal sheet metal parts or short circuits in electrical components. Utility Model Content
[0003] The main purpose of this utility model is to provide a smoke exhaust device and a gas heating device, which aims to prevent or reduce rainwater from flowing back into the gas heating device from the air inlet pipe or smoke exhaust pipe.
[0004] To achieve the above objectives, the present invention proposes a smoke exhaust device, which is applied to a gas heating device having a smoke exhaust port and an air inlet. The smoke exhaust device includes:
[0005] A smoke exhaust pipe having a smoke exhaust channel, the smoke exhaust channel being used to communicate with the smoke exhaust port;
[0006] An air intake pipe is fitted onto the exhaust pipe, and an air intake channel is formed between the air intake pipe and the exhaust pipe. The air intake channel communicates with the air inlet, and the air intake pipe is provided with a drain outlet.
[0007] A baffle is disposed inside the air inlet pipe and located at the drain outlet. The baffle includes a first baffle and a second baffle disposed on the first baffle. The first baffle is disposed on the air inlet pipe, and the air inlet pipe, the first baffle and the second baffle form a guide groove.
[0008] In one embodiment, the drain outlet extends circumferentially along the air inlet pipe; the first baffle and the second baffle are respectively arranged along the length direction of the drain outlet; the first baffle is arranged at an angle to the air inlet pipe, and the first baffle and the second baffle are arranged at an angle.
[0009] In one implementation, the length of the drain outlet is no more than one-quarter of the circumference of the air intake pipe.
[0010] In one embodiment, the smoke exhaust device further includes a connector connecting the smoke exhaust pipe and the air intake pipe, the connector having an air inlet on its bottom surface, and the air intake channel communicating with external air through the air inlet.
[0011] In one embodiment, the connector includes a connecting portion, a first cylindrical body, and a second cylindrical body sleeved on the first cylindrical body;
[0012] The first cylinder and the second cylinder have opposite first ends and second ends; the first end of the first cylinder is connected to the exhaust pipe, the first end of the second cylinder is connected to the air inlet pipe, and the second cylinder has the air inlet at one end near the air inlet pipe.
[0013] The connecting part is connected between the second end of the second cylinder and the first cylinder.
[0014] In one embodiment, the second end of the first cylinder is provided with a flow guide, and the flow guide is provided with a flow guide surface corresponding to the position of the flue gas outlet, and the flow guide surface is convex toward the side where the exhaust pipe is located.
[0015] In one embodiment, the flow guide includes a connecting cylinder, a flow guide tube, and a flow guide cover. One end of the connecting cylinder is connected to the first cylinder body, and the other end is connected to the flow guide tube. A limiting step is provided at the connection between the connecting cylinder and the flow guide tube. The flow guide cover is located at the end of the flow guide tube away from the connecting cylinder. A smoke outlet is provided on the periphery of the flow guide tube. The flow guide surface is located on the flow guide cover and is tapered.
[0016] In one embodiment, the gas heating device is applied to a gas heating device with a flue gas outlet, the flue gas outlet comprising:
[0017] A smoke exhaust pipe, for communicating with the smoke exhaust port, the smoke exhaust pipe being provided with a drain outlet; and
[0018] A baffle is disposed inside the exhaust pipe and located at the drain outlet. The baffle includes a first baffle and a second baffle. The first baffle is disposed in the exhaust pipe, and the second baffle is disposed in the first baffle. The exhaust pipe, the first baffle, and the second baffle form a guide channel.
[0019] In one embodiment, the first baffle and the second baffle are respectively arranged along the length direction of the drain outlet; the first baffle is arranged at an angle to the exhaust pipe, and the first baffle and the second baffle are arranged at an angle.
[0020] This utility model also proposes a gas heating device, which includes:
[0021] Equipment body; and
[0022] The smoke extraction device as described in any of the foregoing embodiments.
[0023] In one embodiment, the gas heating device is a gas water heater.
[0024] The technical solution of this utility model involves setting a drain outlet in the exhaust pipe or air inlet pipe, and installing a baffle near the drain outlet. Rainwater can be discharged from the drain outlet. When there is excessive rainwater, the baffle can block the rainwater, reducing the backflow of rainwater from the exhaust pipe or air inlet pipe into the gas heating equipment. Furthermore, the baffle includes a first baffle and a second baffle, and a guide channel is formed between the exhaust pipe or air inlet pipe, the first baffle, and the second baffle. The guide channel can intercept and guide rainwater to drain quickly, thereby preventing or further reducing the backflow of rainwater from the exhaust pipe or air inlet pipe into the gas heating equipment. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0026] Figure 1 A schematic diagram of an embodiment of the smoke exhaust device provided by this utility model;
[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;
[0028] Figure 3 for Figure 1 A sectional view of XX;
[0029] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;
[0030] Figure 5 for Figure 3 A magnified view of a portion of the image.
[0031] Explanation of icon numbers:
[0032] 10. Smoke exhaust system;
[0033] 11. Smoke exhaust duct; 12. Air intake duct; 13. Drain outlet; 14. Flow guide channel;
[0034] 100. Exhaust pipe; 200. Inlet pipe; 300. Partition; 310. First baffle; 320. Second baffle; 400. Connector; 401. Air inlet; 410. First cylinder; 411. Slot; 420. Second cylinder; 430. Connecting part; 500. Guide component; 501. Guide surface; 502. Smoke outlet; 510. Connecting cylinder; 511. Buckle; 520. Guide cylinder; 530. Guide cover.
[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0039] In gas-fired heating equipment such as gas-fired boilers / water heaters, the exhaust gas from burning natural gas is typically discharged outdoors through a flue pipe, which usually extends outdoors. However, in existing technologies, to prevent rainwater from flowing back into the flue pipe, it needs to be angled downwards. But after-sales installers often fail to follow installation specifications, or are limited by the installation site, resulting in flue pipes with a small downward angle or an upward angle, failing to effectively prevent rainwater backflow. This can lead to problems such as corrosion of sheet metal parts or short circuits in electrical components within the gas heating equipment.
[0040] This utility model proposes a smoke extraction device for use in gas heating equipment, which can be any of the following: gas water heater, gas wall-hung boiler, range hood, and integrated stove. The solution addresses the problem in existing technologies where rainwater flows back into the water heater from the inlet or exhaust pipe, causing corrosion of internal sheet metal parts or short circuits in electrical components. The following description uses the smoke extraction device applied to a gas water heater as an example. For ease of understanding and explanation, the following is attached to the specification of this utility model. Figures 1 to 5 In the diagram, the solid arrow indicates a channel, slot, or opening.
[0041] In some embodiments of this utility model, the smoke exhaust device includes a smoke exhaust pipe and a baffle. The smoke exhaust pipe is used to communicate with the smoke exhaust port of the gas heating equipment and has a drain outlet. The baffle is disposed inside the smoke exhaust pipe and located at the drain outlet. The baffle includes a first baffle and a second baffle. The first baffle is disposed in the smoke exhaust pipe and the second baffle is disposed in the first baffle. The smoke exhaust pipe, the first baffle, and the second baffle form a guide groove.
[0042] The exhaust pipe is used to connect to the exhaust port of the gas heating equipment and form a channel for flue gas discharge. A drain outlet is provided on the exhaust pipe to discharge rainwater and other water entering the exhaust pipe. In some cases, due to the high temperature of the flue gas, condensation may form at the outlet of the exhaust pipe when it encounters cold air in winter. This drain outlet can also discharge such condensation.
[0043] In this embodiment, the drain outlet is located at the bottom of the exhaust pipe, which can effectively drain rainwater or condensate. In addition, the drain outlet can be circular, square, or rectangular. In this embodiment, the drain outlet is rectangular, and its length extends along the circumference of the exhaust pipe.
[0044] It is worth mentioning that, in order to avoid or reduce rainwater entering the exhaust pipe from the drain outlet, the length of the drain outlet in the circumferential direction of the exhaust pipe shall not exceed one-quarter of the circumference of the exhaust pipe; for example, with the lowest point of the exhaust pipe as the midpoint, the drain outlet extends along the circumference of the exhaust pipe, and the extension length on both sides shall not exceed one-eighth of the circumference of the exhaust pipe.
[0045] Furthermore, to improve drainage efficiency, the smoke exhaust device also includes a baffle, which is installed near the drain outlet of the smoke exhaust pipe. In this way, even during heavy rainstorms, the baffle can prevent external rainwater from flowing back into the smoke exhaust pipe to a certain extent.
[0046] The baffle includes a first baffle and a second baffle disposed on the first baffle. Typically, the first baffle is fixed to the inner wall of the exhaust pipe at a certain angle. The second baffle can be located on the side of the first baffle away from the exhaust pipe. In this case, with the drain outlet as the orientation, the first and second baffles are respectively positioned along the length of the drain outlet. The second baffle, positioned above the first baffle, forms an additional protective structure, further preventing backflow of water. Furthermore, this design is simple to manufacture. Alternatively, the second baffle can be located on both sides of the first baffle, and the second baffle is also connected to the inner wall of the exhaust pipe. In this case, with the drain outlet as the orientation, the first baffle is positioned along the length of the drain outlet, and the second baffle extends along the width of the drain outlet.
[0047] The technical solution of this utility model involves setting a drain outlet in the flue pipe and installing a baffle near the drain outlet. Rainwater can be discharged from the drain outlet. When there is excessive rainwater, the baffle can block the rainwater and reduce the backflow of rainwater from the flue pipe into the water heater. Furthermore, the baffle includes a first baffle and a second baffle, and a guide channel is formed between the flue pipe, the first baffle, and the second baffle. The guide channel can intercept and guide rainwater to drain quickly, thereby preventing or reducing the backflow of rainwater from the flue pipe into the gas heating equipment.
[0048] Please refer to some embodiments of this utility model. Figures 1 to 5 The exhaust device 10 is applied to a gas heating device with an exhaust port and an air inlet. The exhaust device 10 includes an exhaust pipe 100, an air inlet pipe 200, and a baffle 300. The exhaust pipe 100 has an exhaust channel 11 for communicating with the exhaust port. The air inlet pipe 200 is sleeved on the exhaust pipe 100, and an air inlet channel 12 is formed between the air inlet pipe 200 and the exhaust pipe 100. The air inlet channel 12 is for communicating with the air inlet. The air inlet pipe 200 is provided with a drain outlet 13. The baffle 300 is provided inside the air inlet pipe 200 and located at the drain outlet 13. The baffle 300 includes a first baffle 310 and a second baffle 320. The first baffle 310 is provided on the air inlet pipe 200, and the second baffle 320 is provided on the first baffle 310. The air inlet pipe 200, the first baffle 310, and the second baffle 320 form a guide groove 14.
[0049] By fitting the air inlet pipe 200 onto the exhaust pipe 100, that is, by wrapping the air inlet pipe 200 around the exhaust pipe 100, a natural heat insulation layer can be formed in the structure. The hot flue gas inside the exhaust pipe 100 will not directly contact the outside of the equipment, which helps to prevent the equipment surface from overheating. Secondly, since the air inlet pipe 200 is fitted onto the outside of the exhaust pipe 100, during after-sales installation, only one installation hole needs to be drilled in the building to install the exhaust pipe 100 and the air inlet pipe 200. This is beneficial to the overall installation and compactness of the structure, which not only facilitates on-site installation and disassembly, but also reduces the installation difficulty and improves the convenience of maintenance.
[0050] In this embodiment, the drain outlet 13 is located at the bottom of the air inlet pipe 200, so that rainwater can be discharged better. In addition, the drain outlet 13 can be circular, square or rectangular. In this embodiment, the drain outlet 13 is set as a rectangle, and the length direction of the drain outlet 13 extends along the circumference of the air inlet pipe 200.
[0051] It is worth mentioning that, in order to avoid or reduce rainwater entering the air intake pipe 200 from the drain outlet 13, the length of the drain outlet 13 in the circumferential direction of the air intake pipe 200 is no more than one-quarter of the circumference of the air intake pipe 200. For example, with the lowest point of the air intake pipe 200 as the midpoint, the drain outlet extends along the circumference of the air intake pipe 200, and the extension length on both sides is no more than one-eighth of the circumference of the air intake pipe 200.
[0052] Furthermore, in order to improve the drainage effect, the smoke exhaust device 10 also includes a baffle 300, which is installed near the drain outlet 13 of the air inlet pipe 200. In this way, even in heavy rain, the baffle 300 can prevent rainwater from flowing back into the gas heating equipment to a certain extent.
[0053] The baffle 300 includes a first baffle 310 and a second baffle 320 disposed on the first baffle 310. Typically, the first baffle 310 is fixed to the inner wall of the intake pipe 200 and is positioned at a certain angle. The second baffle 320 may be located on the side of the first baffle 310 away from the intake pipe 200 (e.g., ...). Figure 4As shown), in this case, with the drain outlet 13 oriented in a certain direction, it can be understood that the first baffle 310 and the second baffle 320 are respectively arranged along the length direction of the drain outlet 13 (the circumferential direction of the air intake pipe); or, the second baffle 320 is arranged on both sides of the first baffle 310, and the second baffle 320 is also connected to the inner wall of the exhaust pipe 100. In this case, with the drain outlet 13 oriented in a certain direction, it can be understood that the first baffle 310 is arranged along the length direction of the drain outlet 13, and the second baffle 320 extends along the width direction of the drain outlet 13. For example, the width direction of the drain outlet 13 can be the axial direction of the air intake pipe 200, or a direction approximately parallel to that axial direction.
[0054] Preferably, the first baffle 310 and the second baffle 320 are respectively arranged along the length direction of the drain outlet 13, the first baffle 310 is arranged at an angle to the air inlet pipe 200, and the first baffle 310 and the second baffle 320 are arranged at an angle; please refer to Figure 4 The arrangement of the first baffle 310 and the second baffle 320 can form an additional protective structure to further prevent water flow from flowing back. Moreover, the manufacturing process of this solution is simple, and the above structure can be achieved by cutting and stamping the air inlet pipe 200.
[0055] The first baffle 310 is set at an angle to the air intake pipe 200, which means that the first baffle 310 and the air intake pipe 200 are bent or bent. The angle between the first baffle 310 and the air intake pipe 200 can be 30°, 45°, 60°, 90°, 120°, 135° or 150°.
[0056] The first baffle 310 and the second baffle 320 are arranged at an angle, meaning that the first baffle 310 and the second baffle 320 are bent or bent together. The angle between the first baffle 310 and the air intake pipe 200 can be 30°, 45°, 60°, 90°, 120°, 135° or 150°.
[0057] In a preferred embodiment, the angle between the first baffle 310 and the air intake pipe 200 is 90°, and the angle between the first baffle 310 and the second baffle 320 is 90°.
[0058] The technical solution of this utility model involves setting a drain outlet 13 in the air inlet pipe 200 and setting a baffle 300 near the drain outlet 13 in the air inlet pipe 200. Rainwater can be discharged from the drain outlet. When there is too much rainwater, the baffle 300 can block the rainwater and reduce the backflow of rainwater from the air inlet pipe 200 into the interior of the gas heating equipment. Furthermore, the baffle 300 includes a first baffle 310 and a second baffle 320. A guide channel 14 is formed between the air inlet pipe 200, the first baffle 310 and the second baffle 320. The guide channel 14 can intercept and guide rainwater to be discharged quickly, thereby avoiding or reducing the backflow of rainwater from the air inlet pipe 200 into the interior of the gas heating equipment.
[0059] Furthermore, by setting the baffle 300 inside the air inlet pipe 200 and at the drain outlet 13, when the power of the gas heating equipment is high, more air is needed to ensure complete combustion of the gas. At this time, the wind speed in the air inlet channel 12 is also high. A guide channel 14 is formed between the air inlet pipe 200, the first baffle 310 and the second baffle 320. The guide channel 14 can, to a certain extent, prevent the airflow from bringing rainwater into the rear section of the air inlet pipe 200, thereby reducing the backflow of rainwater from the air inlet pipe 200 or the exhaust pipe 100 back into the interior of the gas heating equipment, thus reducing the probability of corrosion of sheet metal parts or short circuit of electrical components inside the gas heating equipment.
[0060] In some embodiments, the smoke exhaust device 10 further includes a connector 400 connecting the smoke exhaust pipe 100 and the air intake pipe 200. The connector 400 has an air inlet 401 on its bottom surface, and the air intake channel 12 communicates with the outside air through the air inlet 401.
[0061] In this embodiment, an air inlet 401 is provided on the bottom surface of the connector 400, through which external air is connected, allowing outside air to enter the air intake channel 12. The air inlet 401 is located on the bottom surface of the connector 400, allowing external air to enter along the bottom of the connector 400, avoiding airflow directly flowing in from the front and mixing with the smoke discharged from the exhaust pipe 100, which would cause unstable or turbulent airflow. In addition, placing the air inlet 401 on the bottom surface of the connector 400, that is, on the bottom surface of the exhaust device 10, reduces the amount of rainwater entering the air intake channel 12 compared to placing the air inlet 401 on the top or side of the exhaust device 10.
[0062] In one embodiment, the connector 400 includes a connecting portion 430, a first cylindrical body 410, and a second cylindrical body 420 sleeved on the first cylindrical body 410; the first cylindrical body 410 and the second cylindrical body 420 have opposing first ends and second ends; the first end of the first cylindrical body 410 is connected to the exhaust pipe 100, the first end of the second cylindrical body 420 is connected to the air inlet pipe 200, and the second cylindrical body 420 has an air inlet 401 at one end near the air inlet pipe 200; the connecting portion 430 connects the second end of the second cylindrical body 420 and the first cylindrical body 410.
[0063] In this embodiment, the first cylinder 410 and the second cylinder 420 each have a first end and a second end, and they are connected by a connecting part 430 to maintain a certain relative positional relationship, thereby ensuring the stability of the air intake channel 12. The first end of the first cylinder 410 is directly connected to the exhaust pipe 100, and the gas in the exhaust pipe 100 can flow smoothly into the first cylinder 410 through its internal channel. In addition, the first end of the second cylinder 420 is connected to the air intake pipe 200, and an air inlet 401 is provided at the end near the air intake pipe 200 to guide external air into the gas heating equipment. The connecting part 430 can be arranged in a ring shape or formed by multiple connecting ribs, with one end of the connecting rib connected to the first cylinder 410 and the other end connected to the second cylinder 420.
[0064] In some embodiments, the second end of the first cylinder 410 is provided with a guide member 500, and the guide member 500 is provided with a guide surface 501 corresponding to the position of the flue gas outlet, and the guide surface 501 is provided to protrude toward the side where the exhaust pipe 100 is located.
[0065] In this embodiment, the guide member 500 has a guide surface 501 at its second end near the first cylinder 410, and the guide surface 501 protrudes towards the side where the exhaust pipe 100 is located. Thus, the guide member 500 forms a protective barrier, effectively preventing flue gas from flowing back into the gas heating equipment during use. At other times, such as during strong winds, it can prevent or reduce the backflow of external wind into the gas heating equipment, thereby reducing the impact of external wind on the indoor environment to a certain extent. Furthermore, the guide surface 501, which protrudes towards the side where the exhaust pipe 100 is located, can be convex arc-shaped or conical. This design guides the flue gas flow in a specific direction, reducing turbulence and backflow within the pipe, thereby improving the efficiency and stability of the exhaust process.
[0066] In an exemplary embodiment, the flow guide 500 includes a connecting cylinder 510, a flow guide cylinder 520, and a flow guide cover 530. One end of the connecting cylinder 510 is connected to the first cylinder body 410, and the other end is connected to the flow guide cylinder 520. A limiting step is provided at the connection between the connecting cylinder 510 and the flow guide cylinder 520. The flow guide cover 530 is located at the end of the flow guide cylinder 520 away from the connecting cylinder 510. A smoke outlet 502 is provided on the periphery of the flow guide cylinder 520. The flow guide surface 501 is located on the flow guide cover 530 and is tapered.
[0067] In this embodiment, a limiting step is provided between the connecting cylinder 510 and the guide cylinder 520. This limiting step improves the accuracy and ease of installation of the guide component 500. One end of the connecting cylinder 510 is connected to the first cylinder body 410. The connecting cylinder 510 and the first cylinder body 410 can be integrally formed, or they can be detachably connected. Preferably, the connecting cylinder 510 and the first cylinder body 410 are detachably connected. Detachable connections include threaded connections, pin connections, snap-fit connections (511), snap ring connections, pin and pin hole connections, etc. In this embodiment, the connecting cylinder 510 and the first cylinder body 410 are connected by a snap-fit (511). The connecting cylinder 510 may be equipped with the snap-fit (511), and the first cylinder body 410 may be equipped with a groove 411 that matches the snap-fit (511), or vice versa.
[0068] The guide surface 501 is conical, which can be a cone, a pyramid, etc. In this embodiment, a cone shape is used as an example. In this embodiment, since the shape of the generatrix section along the guide surface 501 is V-shaped, it can also be called V-shaped.
[0069] Thus, in this embodiment, the V-shaped guide cover 530 can guide the flue gas away from the exhaust port and spray it outward, which can enhance the directionality of the flue gas, prevent the flue gas from flowing back near the exhaust port, and significantly reduce the possibility of back-suction. Secondly, by guiding the flue gas away from the outlet area, it can effectively prevent the flue gas containing a large amount of water vapor from being re-inhaled into the system. In low-temperature environments, it can reduce the risk of frost formation in the flue. Furthermore, the conical guide surface 501 design can optimize the flue gas emission path, allowing the flue gas to be discharged quickly without lingering near the exhaust port. In addition, the conical guide surface 501 can also reduce the turbulence of the flue gas, allowing the discharged flue gas to diffuse rapidly within a certain range from the exhaust port, further reducing the possibility of the flue gas being back-suctioned. Moreover, due to the effective anti-backflow design, cold air is prevented from entering the exhaust system, thereby ensuring stable airflow within the exhaust device 10 and not affecting the air intake of the combustion system.
[0070] This utility model also proposes a gas heating device, which includes a main body and a smoke exhaust device 10. The specific structure of the smoke exhaust device 10 is as described in the above embodiments. Since this gas heating device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0071] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A smoke exhaust device, applied to a gas heating equipment having a smoke exhaust port and an air inlet, characterized in that, The smoke extraction device includes: A smoke exhaust pipe having a smoke exhaust channel, the smoke exhaust channel being used to communicate with the smoke exhaust port; An air intake pipe is fitted onto the exhaust pipe, and an air intake channel is formed between the air intake pipe and the exhaust pipe. The air intake channel communicates with the air inlet, and the air intake pipe is provided with a drain outlet. A baffle is disposed inside the air inlet pipe and located at the drain outlet. The baffle includes a first baffle and a second baffle disposed on the first baffle. The first baffle is disposed on the air inlet pipe, and the air inlet pipe, the first baffle and the second baffle form a guide groove.
2. The smoke extraction device as described in claim 1, characterized in that, The drain outlet extends circumferentially along the air inlet pipe; the first baffle and the second baffle are respectively arranged along the length of the drain outlet; the first baffle is arranged at an angle to the air inlet pipe, and the first baffle and the second baffle are arranged at an angle.
3. The smoke extraction device as described in claim 2, characterized in that, In the circumferential direction of the air intake pipe, the length of the drain outlet is no more than one-quarter of the circumference of the air intake pipe.
4. The smoke extraction device according to any one of claims 1 to 3, characterized in that, The smoke exhaust device also includes a connector that connects the smoke exhaust pipe and the air intake pipe. The connector has an air inlet on its bottom surface, and the air intake channel is connected to the outside air through the air inlet.
5. The smoke extraction device as described in claim 4, characterized in that, The connector includes a connecting part, a first cylindrical body, and a second cylindrical body sleeved on the first cylindrical body; The first cylinder and the second cylinder have opposite first ends and second ends; the first end of the first cylinder is connected to the exhaust pipe, the first end of the second cylinder is connected to the air inlet pipe, and the second cylinder has the air inlet at one end near the air inlet pipe. The connecting part is connected between the second end of the second cylinder and the first cylinder.
6. The smoke extraction device as described in claim 5, characterized in that, The second end of the first cylinder is provided with a flow guide, and the flow guide is provided with a flow guide surface corresponding to the position of the flue gas outlet. The flow guide surface is convex towards the side where the exhaust pipe is located.
7. The smoke extraction device as described in claim 6, characterized in that, The flow guide includes a connecting cylinder, a flow guide cylinder, and a flow guide cover. One end of the connecting cylinder is connected to the first cylinder body, and the other end is connected to the flow guide cylinder. A limiting step is provided at the connection between the connecting cylinder and the flow guide cylinder. The flow guide cover is located at the end of the flow guide cylinder away from the connecting cylinder. A smoke outlet is provided on the periphery of the flow guide cylinder. The flow guide surface is located on the flow guide cover and is tapered.
8. A smoke exhaust device, applied to a gas heating equipment having a smoke exhaust port, characterized in that, The smoke extraction device includes: A smoke exhaust pipe, for communicating with the smoke exhaust port, the smoke exhaust pipe being provided with a drain outlet; and A baffle is disposed inside the exhaust pipe and located at the drain outlet. The baffle includes a first baffle and a second baffle. The first baffle is disposed in the exhaust pipe, and the second baffle is disposed in the first baffle. The exhaust pipe, the first baffle, and the second baffle form a guide channel.
9. The smoke extraction device as described in claim 8, characterized in that, The first baffle and the second baffle are respectively arranged along the length of the drain outlet; the first baffle is arranged at an angle to the exhaust pipe, and the first baffle and the second baffle are arranged at an angle.
10. A gas heating device, characterized in that, include: Equipment body; as well as The smoke exhaust device as described in any one of claims 1 to 9.
11. The gas heating device as described in claim 10, characterized in that, The gas heating device is a gas water heater.