A flue gas sampling tool
By designing a flue gas sampling tool with a smoke hood and smoke collection pipe, the problem of condensate blockage in the flue gas sampler of gas water heaters was solved, thus achieving uniformity and accuracy in flue gas detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG VANWARD NEW ELECTRIC CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, the flue gas sampler of a gas water heater suffers from inaccurate flue gas detection due to condensate blockage.
A flue gas sampling tool was designed, including a smoke hood and a smoke collection pipe. The smoke hood is installed on the outer edge of the smoke outlet of the gas water heater. The smoke collection chamber is connected to the smoke outlet, and the smoke collection pipe is connected to the smoke collection chamber. The flue gas is mixed in the smoke collection chamber and then discharged through the smoke collection pipe, reducing the probability of condensate entering the smoke collection pipe and ensuring the uniformity and accuracy of the flue gas sampling.
This effectively reduces the probability of condensate clogging the flue gas collection pipe, ensuring the accuracy and reliability of flue gas detection and avoiding the impact of condensate on flue gas collection.
Smart Images
Figure CN224471346U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of household appliance technology, and in particular to a flue gas sampling tool. Background Technology
[0002] Gas water heaters produce harmful gases in the flue gas generated during gas combustion. The content of harmful gases in the flue gas is an important indicator for judging whether a gas water heater is qualified. Therefore, gas water heaters undergo flue gas testing before leaving the factory.
[0003] In related technologies, such as Figure 1 and Figure 2 As shown, to ensure the uniformity of flue gas sampling, a flue gas sampler 20 with a claw-like structure is installed at the flue gas outlet of the gas water heater's outer casing 10. The flue gas sampler 20 has multiple L-shaped tubes 21 arranged side by side, which extend into the flue gas outlet of the gas water heater's outer casing 10 to collect flue gas. During long-term testing, because the aperture of the L-shaped tubes 21 is relatively small, water vapor in the flue gas condenses upon cooling, forming condensate. This condensate can clog the L-shaped tubes 21, hindering flue gas collection and leading to inaccurate flue gas detection. Utility Model Content
[0004] The technical problem solved by this utility model is to provide a flue gas sampling tool that can effectively solve the problem of condensate water hindering the collection of flue gas.
[0005] The above-mentioned technical problems are solved by the following technical solutions:
[0006] A flue gas sampling tool, comprising:
[0007] A smoke collection hood includes a side plate, a top plate, and a bottom plate. A smoke collection chamber is formed between the side plate, the top plate, and the bottom plate. The smoke collection hood is detachably mounted on the outer edge of the smoke outlet of a gas water heater, and the smoke collection chamber is connected to the smoke outlet.
[0008] A smoke collection pipe is provided on the side plate or the top plate, and the first end of the smoke collection pipe is connected to the smoke collection chamber.
[0009] The flue gas sampling tool described in this utility model has the following advantages compared with the prior art:
[0010] By placing the smoke collection hood over the outer edge of the smoke outlet, the flue gas flowing out of the gas water heater through the smoke outlet can completely enter the smoke collection chamber, mix evenly within the chamber, and then be discharged and collected through the second end of the smoke collection pipe. This effectively ensures the uniformity of the flue gas sampling. Furthermore, the water vapor in the flue gas condenses into condensate when cooled, which can remain in the smoke collection chamber. Since the smoke collection pipe is located on the side plate or the top plate, it helps reduce the probability of condensate entering the smoke collection pipe, thereby reducing the probability of condensate clogging the pipe and hindering flue gas collection, thus ensuring accurate and reliable flue gas detection.
[0011] In one embodiment, a first gap H1 is formed between the base plate and the lower outer edge of the smoke outlet;
[0012] The smoke collection pipe is disposed on the side plate, and a second gap H2 is formed between the first end of the smoke collection pipe and the bottom plate.
[0013] In one embodiment, the first gap H1 is greater than or equal to 10 mm, and the second gap H2 is greater than or equal to the first gap H1.
[0014] In one embodiment, the side plate includes an end plate and flat plate portions disposed on both sides of the end plate, at least one of the two flat plate portions being disposed at an obtuse angle to the end plate, and the end plate being provided with a through hole communicating with the smoke collection pipe.
[0015] In one embodiment, the flue gas sampling tool further includes a first screw connector, through which the smoke collection hood is fastened to the gas water heater; or, the smoke collection hood is glued to the gas water heater.
[0016] In one embodiment, the flue gas sampling tool further includes a first sealing gasket, which is sandwiched between the smoke collection hood and the gas water heater.
[0017] In one embodiment, the smoke collecting pipe includes a first pipe section and a second pipe section arranged at an angle, the first pipe section being connected to the smoke collecting chamber.
[0018] In one embodiment, the first tube extends horizontally or is inclined downwards, and the second tube extends horizontally or is inclined downwards.
[0019] In one embodiment, the flue gas sampling tool further includes a pipe connector, which is fixed to the smoke collection hood, and the smoke collection pipe is detachably connected to the pipe connector.
[0020] In one embodiment, the pipe connector includes a tubular portion, and the smoke collecting pipe is inserted into the tubular portion or sleeved outside the tubular portion.
[0021] In one embodiment, the flue gas sampling tool further includes a second sealing gasket and a second screw connector, and the pipe connector further includes a fixing plate disposed at one end of the tubular portion. The second sealing gasket is sandwiched between the fixing plate and the smoke collection hood, and the fixing plate and the smoke collection hood are fastened together by the second screw connector. Attached Figure Description
[0022] Figure 1 A schematic diagram of a flue gas sampler installed on a gas water heater, based on existing technology.
[0023] Figure 2 A schematic diagram of the structure of a flue gas sampler provided by existing technology;
[0024] Figure 3 A schematic diagram of the structure of the flue gas sampling tool provided by this utility model;
[0025] Figure 4 Exploded view of the structure of the flue gas sampling tool provided by this utility model;
[0026] Figure 5 A schematic diagram of the structure of the smoke hood provided by this utility model;
[0027] Figure 6 A partial cross-sectional view of the flue gas sampler provided by this utility model installed on a gas water heater.
[0028] Label Explanation:
[0029] 10. Outer casing; 20. Flue gas sampler; 21. L-shaped tube;
[0030] 100. Gas water heater; 110. Smoke outlet;
[0031] 200. Smoke hood; 201. Side plate; 202. Top plate; 203. Bottom plate; 210. End plate; 211. Through hole; 220. Flat plate section; 230. Edge;
[0032] 300. Smoke collecting pipe; 310. First pipe section; 320. Second pipe section;
[0033] 400. Pipe fitting; 410. Tubular part; 420. Fixing plate. Detailed Implementation
[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0035] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0038] Reference Figures 3 to 6 As shown, this embodiment provides a flue gas sampling tool for sampling flue gas from a gas water heater 100. The flue gas sampling tool includes a smoke hood 200 and a smoke collection pipe 300.
[0039] The gas water heater 100 is equipped with a smoke outlet 110.
[0040] The smoke hood 200 includes a side plate 201, a top plate 202, and a bottom plate 203. A smoke collection chamber is formed between the side plate 201, the top plate 202, and the bottom plate 203. The smoke hood 200 is detachably installed on the outer edge of the smoke outlet 110 of the gas water heater 100, and the smoke collection chamber is connected to the smoke outlet 110. The smoke collection pipe 300 is installed on the side plate 201 or the top plate 202, and the first end of the smoke collection pipe 300 is connected to the smoke collection chamber.
[0041] It is understandable that, along the height direction of the gas water heater 100, the top plate 202 is located above the bottom plate 203, and the side plate 201 is located between the top plate 202 and the bottom plate 203.
[0042] Understandably, when it is necessary to detect the flue gas from the flue vent 110, the smoke hood 200 can be installed on the gas water heater 100; when it is not necessary to detect the flue gas from the flue vent 110, the smoke hood 200 can be removed from the gas water heater 100.
[0043] In this embodiment, the smoke collection hood 200 is placed over the outer edge of the smoke outlet 110, which allows the flue gas flowing out of the gas water heater 100 through the smoke outlet 110 to completely enter the smoke collection chamber, mix evenly in the smoke collection chamber, and then be discharged and collected through the second end of the smoke collection pipe 300. This effectively ensures the uniformity of the flue gas sampling. Furthermore, the water vapor in the flue gas condenses into condensate when it cools and can remain in the smoke collection chamber. Since the smoke collection pipe 300 is located on the side plate 201 or the top plate 202, it helps to reduce the probability of condensate entering the smoke collection pipe 300, thereby reducing the probability of condensate clogging the smoke collection pipe 300, i.e., reducing the probability of condensate hindering the collection of flue gas, and ensuring accurate and reliable flue gas detection. Understandably, most of the water vapor in the flue gas condenses into condensate when it cools and remains in the flue gas collection chamber. The flue gas temperature inside the flue gas collection pipe 300 is lower than that inside the flue gas collection hood 200, allowing the remaining water vapor to be discharged from the flue gas collection pipe 300 with the flue gas. Even if the remaining water vapor is pre-cooled in the flue gas collection pipe 300, the amount of condensate formed will be very small, which helps to reduce the probability of condensate clogging the flue gas collection pipe 300.
[0044] For example, the inner diameter of the smoke collection pipe 300 is 30mm-75mm, such as 45mm, 50mm, 55mm or 60mm, which helps to reduce the probability of condensate clogging the smoke collection pipe 300 and ensures accurate and reliable detection of flue gas.
[0045] In one feasible implementation, a first gap H1 is formed between the bottom plate 203 and the lower outer edge of the flue vent 110, so that the outer casing of the gas water heater 100 can prevent condensate from flowing back through the flue vent 110. It is understood that the distance between the top plate 202 and the bottom plate 203 is greater than the dimension of the flue vent 110 along the height direction of the gas water heater 100.
[0046] For example, the first gap H1 ≥ 10 mm is beneficial to prevent condensate from flowing back through the flue gas outlet 110.
[0047] In one feasible implementation, the smoke collection pipe 300 is disposed on the side plate 201, and a second gap H2 is formed between the first end of the smoke collection pipe 300 and the bottom plate 203, which helps to reduce the probability of condensate in the smoke collection hood 200 entering the smoke collection pipe 300 and ensures accurate and reliable detection of flue gas.
[0048] For example, the second gap H2 is greater than or equal to the first gap H1, which helps to reduce the probability of condensate in the smoke hood 200 entering the smoke collection pipe 300. In some embodiments, the second gap H2 may also be smaller than the first gap H1.
[0049] For example, the smoke collection pipe 300 is centrally located on the side plate 201.
[0050] In one feasible implementation, the flue gas sampling tool further includes a flue gas sensor (not shown), which can be installed on the smoke collection pipe 300 and used to detect the carbon monoxide concentration within the smoke collection pipe 300. The flue gas temperature within the smoke collection pipe 300 is lower than the flue gas temperature within the smoke collection hood 200, which helps the flue gas sensor maintain a lower temperature and improves detection accuracy. Of course, the flue gas sensor can also be located on the smoke collection hood 200.
[0051] In this embodiment, reference is made to Figures 3 to 5 As shown, the side plate 201 includes an end plate 210 and flat plate portions 220 disposed on both sides of the end plate 210, with at least one of the two flat plate portions 220 forming an obtuse angle with the end plate 210. The end plate 210 has a through hole 211 communicating with the smoke collecting pipe 300. In this embodiment, the obtuse angle between at least one of the flat plate portions 220 and the end plate 210 guides the smoke within the smoke collecting hood 200 to flow towards the smoke collecting pipe 300, facilitating the mixing of the smoke.
[0052] For example, the two flat sections 220 can be arranged symmetrically.
[0053] In one feasible implementation, the flat plate 220 has an edge 230 on the side away from the end plate 210, and the smoke hood 200 abuts against the gas water heater 100 through the edge 230 to prevent the smoke hood 200 from scratching the gas water heater 100.
[0054] In one feasible embodiment, the flue gas sampling tool further includes a first sealing gasket (not shown), which is sandwiched between the smoke hood 200 and the gas water heater 100 to seal the gap between them, preventing flue gas from flowing out through the gap and effectively ensuring accurate and reliable flue gas detection. For example, the first sealing gasket can be a sealing cotton.
[0055] In some embodiments, the flue gas sampling tool further includes a first screw connector (not shown), through which the smoke hood 200 is fastened to the gas water heater 100. Exemplarily, the first screw connector may pass through the edge 230 and be threadedly connected to the outer casing of the gas water heater 100. Multiple first screw connectors may be provided. In this embodiment, a first sealing gasket may be sandwiched between the smoke hood 200 and the gas water heater 100.
[0056] In other embodiments, the fume hood 200 is adhesively attached to the gas water heater 100. Exemplarily, the fume hood 200 can be attached to the gas water heater 100 using double-sided adhesive, for example, a double-sided adhesive with high-temperature resistance. The double-sided adhesive effectively seals the gap between the fume hood 200 and the gas water heater 100; therefore, when the fume hood 200 is adhesively attached to the gas water heater 100, a first sealing gasket is not required between the fume hood 200 and the gas water heater 100.
[0057] Of course, the smoke hood 200 can also be fixed to the gas water heater 100 in other ways, which is not limited in this embodiment.
[0058] In this embodiment, reference is made to Figure 3 and Figure 4 As shown, the smoke collection pipe 300 includes a first pipe section 310 and a second pipe section 320 arranged at an angle, with the first pipe section 310 communicating with the smoke collection chamber. In this embodiment, the inspector typically stands in front of the smoke outlet 110 to collect the smoke. The angled arrangement of the first pipe section 310 and the second pipe section 320 prevents the port of the second pipe section 320 from facing the inspector, making it safer for the inspector to collect the smoke from the port of the second pipe section 320.
[0059] For example, the first pipe portion 310 extends horizontally or is inclined downwards, which helps to reduce the risk of condensate in the flue pipe 300 flowing back into the flue chamber. In some embodiments, the first pipe portion 310 extends along the thickness direction of the gas water heater 100.
[0060] For example, the second pipe portion 320 extends horizontally or is inclined downwards, which helps to reduce the risk of condensate in the flue pipe 300 flowing back into the flue chamber. In some embodiments, the second pipe portion 320 extends along the width direction of the gas water heater 100.
[0061] In this embodiment, reference continues to be made to... Figure 3 and Figure 4 As shown, the flue gas sampling tool also includes a pipe connector 400, which is fixed to the smoke collection hood 200. The smoke collection pipe 300 is detachably connected to the pipe connector 400, facilitating the replacement of the smoke collection pipe 300. Furthermore, when it is not necessary to detect the flue gas from the smoke outlet 110, the smoke collection hood 200 and the smoke collection pipe 300 can be disassembled for easy storage. It is understood that the smoke collection pipe 300 can be connected to the smoke collection hood 200 via the pipe connector 400, and thus connected to the smoke outlet 110.
[0062] Specifically, the pipe connector 400 is located on the end plate 210 of the smoke hood 200.
[0063] Specifically, the pipe connector 400 includes a tubular portion 410, and the smoke collection pipe 300 is inserted into the tubular portion 410 or sleeved on the outside of the tubular portion 410, which facilitates the assembly and disassembly of the smoke collection pipe 300.
[0064] In some embodiments, the smoke collecting pipe 300 and the tubular portion 410 may be threaded together. In other embodiments, the smoke collecting pipe 300 can be fixed to the pipe joint 400 solely by the frictional force between it and the tubular portion 410, and the port orientation of the second pipe portion 320 of the smoke collecting pipe 300 is adjustable to facilitate the collection of smoke by inspection personnel.
[0065] In one feasible embodiment, the flue gas sampling tool further includes a second sealing gasket (not shown) and a second screw connector (not shown). The pipe connector 400 also includes a fixing plate 420 disposed at one end of the tubular portion 410. The second sealing gasket is sandwiched between the fixing plate 420 and the smoke hood 200. The fixing plate 420 and the smoke hood 200 are fastened together by the second screw connector, facilitating assembly. The second sealing gasket seals the gap between the smoke hood 200 and the pipe connector 400, preventing flue gas from flowing out through the gap, effectively ensuring accurate and reliable flue gas detection. Exemplarily, the second screw connector can pass through the fixing plate 420 and the smoke hood 200 and be threadedly connected to a nut. Multiple second screw connectors may be provided. Exemplarily, the second sealing gasket can be a sealing cotton.
[0066] Of course, the pipe joint 400 can also be connected to the smoke hood 200 by riveting or welding, etc., which is not limited in this embodiment.
[0067] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.
[0068] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A flue gas sampling tool, characterized in that, include: A smoke collection hood (200) includes a side plate (201), a top plate (202), and a bottom plate (203). A smoke collection chamber is formed between the side plate (201), the top plate (202), and the bottom plate (203). The smoke collection hood (200) is detachably mounted on the outer edge of the smoke outlet (110) of the gas water heater (100), and the smoke collection chamber is connected to the smoke outlet (110). A smoke collection pipe (300) is provided on the side plate (201) or the top plate (202), and the first end of the smoke collection pipe (300) is connected to the smoke collection chamber.
2. The flue gas sampling tool according to claim 1, characterized in that, A first gap H1 is formed between the bottom plate (203) and the lower outer edge of the smoke outlet (110); The smoke collection pipe (300) is disposed on the side plate (201), and a second gap H2 is formed between the first end of the smoke collection pipe (300) and the bottom plate (203).
3. The flue gas sampling tool according to claim 2, characterized in that, The first gap H1 is greater than or equal to 10 mm, and the second gap H2 is greater than or equal to the first gap H1.
4. The flue gas sampling tool according to claim 1, characterized in that, The side plate (201) includes an end plate (210) and flat plate portions (221) disposed on both sides of the end plate (210). At least one of the two flat plate portions (221) is disposed at an obtuse angle to the end plate (210), and the end plate (210) is provided with a through hole (211) communicating with the smoke collection pipe (300).
5. The flue gas sampling tool according to claim 1, characterized in that, The flue gas sampling tool also includes a first screw connector, and the smoke hood (200) is fastened to the gas water heater (100) by the first screw connector; or, the smoke hood (200) is glued to the gas water heater (100).
6. The flue gas sampling tool according to claim 1, characterized in that, The flue gas sampling tool also includes a first sealing gasket, which is sandwiched between the smoke collection hood (200) and the gas water heater (100).
7. The flue gas sampling tool according to claim 1, characterized in that, The smoke collection pipe (300) includes a first pipe section (310) and a second pipe section (320) arranged at an angle, and the first pipe section (310) is connected to the smoke collection chamber.
8. The flue gas sampling tool according to claim 7, wherein the first tube (310) extends horizontally or is inclined downward, and the second tube (320) extends horizontally or is inclined downward.
9. The flue gas sampling tool according to any one of claims 1-8, characterized in that, The flue gas sampling tool also includes a pipe connector (400), which is fixed to the smoke collection hood (200), and the smoke collection pipe (300) is detachably connected to the pipe connector (400).
10. The flue gas sampling tool according to claim 9, characterized in that, The pipe connector (400) includes a tubular portion (410), and the smoke collection pipe (300) is inserted into the tubular portion (410) or sleeved on the outside of the tubular portion (410).
11. The flue gas sampling tool according to claim 10, characterized in that, The flue gas sampling tool also includes a second sealing gasket and a second screw connector. The pipe joint (400) also includes a fixing plate (420) disposed at one end of the tubular part (410). The second sealing gasket is sandwiched between the fixing plate (420) and the smoke collection hood (200). The fixing plate (420) and the smoke collection hood (200) are fastened together by the second screw connector.