Covers, flue gas venting components and gas water heaters

Abstract

This application relates to a plug, a smoke exhaust assembly, and a gas water heater. The plug includes a hollow cover with one open end and one closed end. The closed end of the cover is used to block the smoke exhaust port of the smoke exhaust pipe. A smoke guide groove is formed on the side wall of the cover, located at the closed end and extending in a direction intersecting the axial direction of the cover. The smoke guide groove has two openings arranged opposite each other along its extending direction. One opening of the smoke guide groove communicates with the interior of the smoke exhaust pipe, and the other opening communicates with the outside. The plug, smoke exhaust assembly, and gas water heater provided by this application have good windproof performance, resulting in a low failure rate of the gas water heater.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a plug, a smoke exhaust assembly, and a gas water heater. Background Technology

[0002] Gas water heaters are favored by people and widely used in people's lives due to their superior convenience.

[0003] The working principle of a gas water heater is as follows: the heat generated by the combustion of gas in the combustion chamber is absorbed by the raw water in the water supply chamber to form hot water for the user. In order to promptly remove the flue gas generated by combustion in the combustion chamber, the gas water heater has a flue pipe connecting the outside to the combustion chamber, and the flue pipe wall has an outlet hole for discharging the flue gas, and the flue outlet of the flue pipe is sealed with a plug.

[0004] However, in traditional gas water heaters, although a cover is installed, external air can easily enter the flue pipe through the gas outlet, causing the gas water heater to malfunction. Summary of the Invention

[0005] In view of the above problems, this application provides a plug, a smoke exhaust assembly, and a gas water heater.

[0006] A plug includes a hollow cover body with one end open and the other end closed. The closed end of the cover body is used to block the exhaust port of the exhaust pipe. A smoke guiding groove is provided on the side wall of the cover body. The smoke guiding groove is located at the closed end and extends in a direction intersecting with the axial direction of the cover body.

[0007] The smoke guide channel has two openings that are arranged opposite each other along its extension direction. One of the openings of the smoke guide channel is connected to the interior of the smoke exhaust pipe, and the other opening of the smoke guide channel is connected to the outside.

[0008] In some embodiments, the sidewall of the cover is further provided with a plurality of drainage holes, each drainage hole being at least partially disposed at the opening end of the cover and at least partially exposed outside the exhaust pipe, all the drainage holes being spaced apart along the circumference of the cover, and each drainage hole penetrating the sidewall of the cover;

[0009] The smoke guide channels are multiple and arranged circumferentially along the cover, and each corresponds to one of the drain holes. Each smoke guide channel is connected to the outside through its corresponding drain hole.

[0010] In some embodiments, a plurality of drainage holes are provided on the side wall of the cover, each drainage hole being at least partially disposed at the opening end of the cover and at least partially exposed outside the exhaust pipe, and all the drainage holes being spaced apart along the circumference of the cover;

[0011] The smoke guide channels are multiple and arranged along the circumference of the cover, and correspond one-to-one with all the drain holes. Each smoke guide channel is connected to the outside through its corresponding drain hole.

[0012] The side wall of the cover is provided with a drainage channel extending circumferentially along the cover, and each drainage hole is connected to the drainage channel.

[0013] In some embodiments, the drainage channels are positioned relative to each of the smoke guide channels near the central axis of the cover.

[0014] In some embodiments, along the flue gas emission direction of the flue gas guide channels, the bottom wall of each flue gas guide channel gradually approaches the central axis of the cover.

[0015] In some embodiments, the closed end of the cover is nested inside the exhaust pipe and is press-fitted with the exhaust pipe, while the open end of the cover extends out of the exhaust pipe;

[0016] The outer peripheral surface of the closed end of the cover is recessed relative to the outer peripheral surface of the open end of the cover and together with the outer peripheral surface of the open end of the cover to form a stepped surface, and the stepped surface overlaps the end face of the exhaust pipe where the exhaust port is opened.

[0017] In some embodiments, the cover further includes a windbreak rib, which is coupled to the open end of the cover, and the orthographic projection of the windbreak rib on the cover at least covers a portion of the opening of the cover.

[0018] In some embodiments, the wind deflector is arranged circumferentially around the cover and extends in a direction toward the central axis of the cover.

[0019] A smoke extraction assembly, comprising:

[0020] The exhaust pipe has an exhaust port; and

[0021] As described in any of the above embodiments, the closed end of the cover is used to block the exhaust port, and one opening of the smoke guide groove is connected to the interior of the exhaust pipe, while the other opening of the smoke guide groove is connected to the outside.

[0022] A gas water heater, comprising:

[0023] The main body, which contains a combustion chamber; and

[0024] As described in the above embodiments, the exhaust pipe is connected to the combustion chamber at the end furthest from the cover.

[0025] The aforementioned cover, exhaust assembly, and gas water heater, by incorporating a smoke guide groove extending along the direction intersecting the axial direction of the cover, effectively block external wind when it blows in the opposite direction to the cover's axial direction due to the obstruction of the end plate. When external wind blows in the direction of gravity, the closed end, located inside the exhaust pipe, prevents the wind from entering the pipe due to the obstruction of the pipe's outer wall. When external wind blows in a downward-sloping direction, the bottom and side walls of the smoke guide groove also cause significant wind energy loss, increasing the difficulty for the wind to change direction and enter the exhaust pipe along the extension direction of the smoke guide groove. Thus, it effectively blocks wind from multiple directions, providing superior wind protection and reducing the likelihood of gas water heater malfunctions. In addition, since the two openings of the smoke guide channel are spaced apart along its extension direction, and the smoke guide channel is located at the closed end and is installed inside the exhaust pipe, rainwater falling along the direction of gravity or tilting downwards is less likely to enter the exhaust pipe through the openings of the smoke guide channel along its extension direction, thus having a better rainproof effect.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a gas water heater in some embodiments of this application.

[0029] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the exhaust assembly in a gas water heater along the AA direction.

[0030] Figure 3 for Figure 2 An enlarged schematic diagram of a portion of structure C in the smoke exhaust assembly shown.

[0031] Figure 4 for Figure 1 The diagram shows the structure of the smoke exhaust assembly with the plug sealing the smoke exhaust pipe.

[0032] Figure 5 for Figure 4 An enlarged schematic diagram of a portion of structure D in the smoke exhaust assembly shown.

[0033] Figure 6 This is a schematic diagram showing the extension direction of the projection of the smoke guide channel onto the reference plane, intersecting with the axial direction of the cover.

[0034] Figure 7 for Figure 1 The diagram shows an explosion of the exhaust assembly in a gas water heater.

[0035] Figure 8 for Figure 7 An enlarged schematic diagram of a portion of the smoke exhaust assembly shown.

[0036] Figure 9 for Figure 1 The diagram shows the structure of a gas water heater after the plug has been partially removed along the AA direction.

[0037] Figure 10 This is a schematic diagram of the structure of the plug after part of it has been cut off along the AA direction in some other embodiments of this application.

[0038] Figure 11 for Figure 10 The top view of the plug shown.

[0039] Figure 12 This is a schematic diagram showing, in some embodiments of this application, the bottom wall of each smoke guide channel gradually approaches the central axis of the cover along the flue gas emission direction.

[0040] Icon labels:

[0041] 1000. Gas water heater;

[0042] 100. Smoke exhaust assembly; 200. Main body;

[0043] 10. Cover; 20. Exhaust pipe;

[0044] 11. Cover; 12. Windbreak ribs;

[0045] 111. Smoke guide trough; 1111. Bottom wall of the trough; 112. Drain hole; 113. Drain channel; 1131. First channel wall; 1132. Second channel wall; 114. Stepped surface; 115. End plate; 116. Side plate;

[0046] 21. Smoke exhaust vent;

[0047] L, the central axis of the cover; X, the axial direction of the cover. Detailed Implementation

[0048] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0049] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0050] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0054] Please see Figure 1 This application provides a gas water heater 1000, which includes a main body 200 and a flue gas exhaust assembly 100. The main body 200 has a combustion chamber and a water supply chamber. The flue gas exhaust assembly 100 includes a flue pipe 20 and a plug 10. The flue pipe 20 has a flue gas outlet 21, and the plug 10 seals the flue gas outlet 21 of the flue pipe 20. The end of the flue pipe 20 away from the cover 11 is connected to the combustion chamber. The gas burns in the combustion chamber to heat the raw water in the water supply chamber to supply hot water to the user. The flue gas generated by combustion is discharged to the outside through the flue pipe 20 and the plug 10.

[0055] External refers to the spatial environment in which the gas water heater 1000 is located. The exhaust port 21 of the exhaust pipe 20 can be understood as the pipe opening of the exhaust pipe 20 that is far away from the combustion chamber.

[0056] Please refer to the following: Figure 2 , Figure 3 , Figure 4 and Figure 5 The cover 10 includes a hollow cover 11 with one open end and one closed end. The closed end of the cover 11 is used to block the exhaust port 21 of the exhaust pipe 20. A smoke guide groove 111 is provided on the side wall of the cover 11. The smoke guide groove 111 is located at the closed end and extends in a direction intersecting the axial direction X of the cover 11. The smoke guide groove 111 has two openings arranged opposite to each other along its extension direction. One opening of the smoke guide groove 111 communicates with the interior of the exhaust pipe 20, and the other opening of the smoke guide groove 111 communicates with the outside.

[0057] The smoke guide channel 111 is defined by two openings spaced apart along its extension direction, namely the first opening and the second opening. The planes containing the first and second openings are two opposite end faces of the smoke guide channel 111 along its extension direction. The first opening communicates with the interior of the exhaust pipe 20, and the second opening can communicate directly or indirectly with the outside. Direct communication between the second opening and the outside means that there is no intermediate channel structure between the second opening and the outside, while indirect communication means that the second opening and the outside are connected through other intermediate channel structures. The first opening is located at the closed end, and the second opening is located at the closed end or at the connection between the closed end and the open end.

[0058] The cover 11 includes an end plate 115 and a side plate 116. The side plate 116 is arranged circumferentially around the end plate 115 and extends in the same direction to form the cover 11. The side plate 116 is the side wall of the cover 11, and the direction in which the side plate 116 extends is the axial direction X of the cover 11. The smoke guide groove 111 is formed by the end plate 115 and the side plate 116 being recessed together in the direction toward the central axis L of the cover 11 (a virtual straight line extending along the axial direction X of the cover 11).

[0059] During assembly, the closed end of the cover 11 is nested inside the exhaust pipe 20 and is press-fitted with the exhaust pipe 20 to seal the exhaust port 21, while the open end of the cover 11 extends out of the exhaust pipe 20.

[0060] The open end of the cover 11 refers to the portion of the cover 11 that extends outside the exhaust pipe 20 when it is assembled onto the exhaust pipe 20. The open end of the cover 11 includes the portion of the side plate 116 extending outside the exhaust pipe 20 and the opening of the cover 11. The closed end of the cover 11 refers to the portion of the cover 11 that is located inside the exhaust pipe 20 when it is assembled onto the exhaust pipe 20. The closed end of the cover 11 includes the remaining portion of the side plate 116 and the end plate 115 located inside the exhaust pipe 20. The open end and the closed end of the cover 11 together form the cover 11.

[0061] Please refer to the following: Figure 8 During the operation of the gas water heater 1000, the flue gas generated by the combustion of gas in the combustion chamber flows into the flue gas channel 111 through the first opening of the flue gas pipe 20, and is finally discharged to the outside through the second opening of the flue gas channel 111 (the flow direction of the flue gas is as follows). Figure 8 (The direction indicated by the middle arrow a to the arrow b).

[0062] by Figure 5 Taking the case where the exhaust end of the central exhaust pipe 20 with the exhaust port 21 is horizontally set as an example, please refer to the following: Figure 6 A plane parallel to the axial direction X of the cover 11 and perpendicular to the direction of gravity is defined as the reference plane (e.g., Figure 6In the plane W), where the extending direction of the smoke guide groove 111 intersects the axial direction X of the cover 11, the projection of the smoke guide groove 111 in the reference plane (such as...) Figure 6 The extension direction of the projection T in the middle (e.g.) Figure 6 The direction indicated by the middle arrow P) intersects the axial direction X of the cover 11, and the angle between the extension direction of the projection of the smoke guide groove 111 in the reference plane and the axial direction X of the cover 11 (as shown by the middle arrow P) is the same as the angle between the extension direction of the projection of the smoke guide groove 111 in the reference plane and the axial direction X of the cover 11. Figure 6 The included angle R (as shown) is either acute or obtuse.

[0063] After assembly, the exhaust end of the exhaust pipe 20 is typically configured as follows: Figure 5 The horizontal setting state. During actual operation, external wind (cold wind in winter, hot wind in summer) may be in the opposite direction to the axial direction X of the cover 11, or in the direction of gravity (e.g., Figure 5 (As shown by the middle arrow Y), in a downward inclined direction that intersects both the axial direction X and the direction of gravity of the cover 11 (exemplarily, such as...). Figure 5 (As indicated by the middle arrow Z) blows towards the plug 10 and the exhaust pipe 20.

[0064] In a traditional gas water heater 1000, the plug 10 also has a cover 11, but the cover 11 only includes a side plate 116 and an end plate 115, and there is no smoke guide groove 111 on the cover 11. When external wind blows in the opposite direction to the axial direction X of the cover 11, the end plate 115 can block the external wind outside the exhaust pipe 20, which has a good wind-blocking effect. When external wind blows in the direction of gravity or in a downward tilt, the wind can easily enter the exhaust pipe 20 through the air outlet, causing the combustion chamber to be affected by the wind and unable to ignite, resulting in a high failure rate. Moreover, when the wind is cold, the cold wind can easily freeze and damage the components in the combustion chamber, thus shortening the service life of the gas water heater 1000.

[0065] In this application, by setting the smoke guide groove 111 to extend in the direction intersecting the axial direction X of the cover 11, when external wind blows in the opposite direction to the axial direction X of the cover 11, the wind-blocking effect is also good due to the blocking effect of the end plate 115. When external wind blows in the direction of gravity, since the closed end is located inside the exhaust pipe 20, the wind cannot blow into the exhaust pipe 20 due to the obstruction of the outer wall of the exhaust pipe 20. When external wind blows in a downward direction, the obstruction of the bottom wall 1111 and the side wall of the smoke guide groove 111 can also cause a large loss of wind energy, and the difficulty of the wind changing direction and entering the exhaust pipe 20 along the extension direction of the smoke guide groove 111 increases. In this way, wind blowing from multiple directions can be effectively blocked, which has a better windproof effect and reduces the failure rate of the gas water heater 1000.

[0066] In addition, since the two openings of the smoke guide channel 111 are spaced apart along its extension direction, and the smoke guide channel 111 is located at the closed end and is installed in the exhaust pipe 20, rainwater falling along the direction of gravity or tilting downward is less likely to enter the exhaust pipe 20 through the openings of the smoke guide channel 111 along its extension direction, thus having a better rainproof effect.

[0067] Please refer to the following: Figure 8 and Figure 9 In some embodiments of this application, the sidewall of the cover 11 is also provided with a plurality of drainage holes 112. Each drainage hole 112 is at least partially disposed at the opening end of the cover 11 and at least partially exposed outside the exhaust pipe 20. All drainage holes 112 are spaced apart along the circumference of the cover 11, and each drainage hole 112 penetrates the sidewall of the cover 11.

[0068] The smoke guide channels 111 are multiple and arranged around the circumference of the cover 11, and correspond one-to-one with all the drain holes 112. Each smoke guide channel 111 is connected to the outside through its corresponding drain hole 112.

[0069] The phrase "each drain hole 112 is at least partially provided at the open end of the cover 11" means that each drain hole 112 may be provided at the open end of the cover 11, or that a portion of each drain hole 112 is provided at the open end and the remainder is provided at the closed end. The phrase "each drain hole 112 is at least partially exposed outside the exhaust pipe 20" means that the opening of each drain hole 112 is completely exposed to the outside, or that a portion of the opening of each drain hole 112 is exposed to the outside and the remainder of the opening of each drain hole 112 is located inside the exhaust pipe 20.

[0070] In this embodiment, the sidewall is a solid structure, and each drain hole 112 penetrates the inner and outer surfaces of the sidewall of the cover 11.

[0071] In actual installation, the exhaust pipe 20 is typically installed as follows: Figure 5 As shown, the exhaust pipe 20 has a horizontal exhaust end with an exhaust port 21. When rainwater flows down along the direction of gravity or at an angle, it flows in through the drain hole 112 of the cover 11 and is discharged through the drain hole 112 at the bottom of the cover 11. Alternatively, rainwater can also flow in through the drain hole 112 of the cover 11 and flow along the side wall of the cover 11 or the inner surface of the end plate 115, and finally be discharged through the drain hole 112 at the bottom of the cover 11. This reduces the risk of rainwater entering the combustion chamber through the smoke guide channel 111 and the exhaust pipe 20, which could cause the gas water heater 1000 to malfunction.

[0072] Furthermore, the flue gas entering each smoke guide trough 111 through the exhaust pipe 20 can also be discharged to the outside through the drain hole 112 connected to each smoke guide trough 111, ensuring normal emission of flue gas (for example, the emission direction of flue gas in one of the smoke guide troughs 111 is as follows). Figure 8 (Pointed to by the middle arrow a).

[0073] Please refer to the following: Figure 10 and Figure 11 In some embodiments of this application, a plurality of drainage holes 112 are provided on the side wall of the cover 11. Each drainage hole 112 is at least partially located at the open end of the cover 11 and is at least partially exposed outside the smoke exhaust pipe 20. All drainage holes 112 are spaced apart along the circumference of the cover 11. There are a plurality of smoke guide grooves 111 arranged along the circumference of the cover 11 and corresponding one-to-one with all drainage holes 112. Each smoke guide groove 111 is connected to the outside through its corresponding drainage hole 112. A drainage channel 113 extending along the circumference of the cover 11 is provided in the side wall of the cover 11. Each drainage hole 112 is connected to the drainage channel 113.

[0074] In this embodiment, the sidewall has a double-layer structure, including an inner layer and an outer layer that is circumferentially arranged around the inner layer and connected to the inner layer. A drainage channel 113 is defined between the inner layer and the outer layer. Each drainage hole 112 is arranged on the outer layer of the sidewall and penetrates the inner and outer surfaces of the outer layer, and is connected to the drainage channel 113.

[0075] The drainage channel 113 may be located at the closed end of the cover 11 and / or at the open end of the cover 11.

[0076] In this embodiment, when rainwater flows down along the direction of gravity or at a downward angle, it passes through the drain hole 112 of the cover 11 and enters the drain channel 113. Then, it slides down the channel wall of the drain channel 113 and is finally discharged through the drain hole 112 at the bottom of the cover 11. This increases the difficulty for rainwater to enter the combustion chamber through the flue duct 111 and the exhaust pipe 20, thus reducing the risk of malfunction in the gas water heater 1000.

[0077] It is worth mentioning that the flue gas in each flue gas channel 111 can also be discharged to the outside through the exhaust hole 112 connected to it.

[0078] In some embodiments of this application, the drainage channel 113 is positioned relative to each smoke guide groove 111 near the central axis L of the cover 11.

[0079] The drainage channel 113 is defined to have a first channel wall 1131 and a second channel wall 1132 extending circumferentially along the cover 11. The first channel wall 1131 and the second channel wall 1132 are arranged radially along the cover 11, and the first channel wall 1131 is arranged away from the central axis L of the cover 11 relative to the second channel wall 1132.

[0080] The drainage channel 113 is positioned relative to each smoke guide groove 111 near the central axis L of the cover 11, meaning that the first channel wall 1131 is positioned relative to the bottom wall 1111 of each smoke guide groove 111 near the central axis L of the cover 11.

[0081] Because the drain channel 113 is positioned close to the central axis L of the cover 11 relative to the smoke guide groove 111, when the exhaust end of the exhaust pipe 20 is as follows: Figure 5 With a horizontally oriented design, when rainwater flows down in the direction of gravity or at an angle, it passes through the drain hole 112 on the cover 11 and directly enters the drain channel 113, preventing backflow into the smoke guide groove 111 that connects to the drain hole 112. Consequently, rainwater also prevents backflow into the combustion chamber, reducing the failure rate of the gas water heater 1000 and extending its service life.

[0082] Please refer to the following: Figure 12 In some embodiments of this application, along the flue gas emission direction of the smoke guide channel 111 (the flue gas emission direction within one of the smoke guide channels 111 is as follows: ...) Figure 8 (As indicated by the middle arrow a), the bottom wall 1111 of each smoke guide groove 111 gradually approaches the central axis L of the cover 11.

[0083] Along the radial direction of the cover 11, the minimum distance between the bottom wall 1111 of the smoke guide channel 111 and the central axis L of the cover 11 is distance H. Along the flue gas emission direction of the smoke guide channel 111, the bottom wall 1111 of the smoke guide channel 111 gradually approaches the central axis L of the cover 11. It can be understood that along the flue gas emission direction of the smoke guide channel 111, the distance H between the bottom wall 1111 of the smoke guide channel 111 and the central axis L of the cover 11 gradually decreases.

[0084] In this embodiment, when rainwater flows down along the direction of gravity or at an angle downwards, the rainwater directly enters the drainage channel 113 through the drainage hole 112 of the cover 11, and is discharged to the outside through the drainage hole 112 at the bottom of the cover 11. This ensures that the rainwater will not flow back into the smoke guide channel 111 that is connected to the drainage hole 112 through which the rainwater flows. As a result, the failure rate of the gas water heater 1000 is reduced and its service life is extended.

[0085] Please refer to it again. Figure 5 and Figure 8 In some embodiments of this application, the closed end of the cover 11 is nested inside the exhaust pipe 20 and is press-fitted with the exhaust pipe 20, while the open end of the cover 11 extends out of the exhaust pipe 20. The outer peripheral surface of the closed end of the cover 11 is recessed relative to the outer peripheral surface of the open end of the cover 11 and together with the outer peripheral surface of the open end of the cover 11 to form a stepped surface 114, and the stepped surface 114 overlaps the end face of the exhaust pipe 20 where the exhaust port 21 is opened.

[0086] The inward convergence of the outer circumferential surface of the closed end relative to the outer circumferential surface of the open end can be understood as follows: the outer circumferential surface of the closed end is recessed relative to the outer circumferential surface of the open end to be positioned close to the central axis L of the cover 11. This inward convergence of the outer circumferential surface of the closed end relative to the outer circumferential surface of the open end results in the outer diameter of the closed end being smaller than the outer diameter of the open end. The outer diameter of the closed end refers to the maximum distance from the central axis L of the cover 11 to the outer circumferential surface of the closed end, and the outer diameter of the open end refers to the maximum distance from the central axis L of the cover 11 to the outer circumferential surface of the open end.

[0087] During actual assembly, the closed end is inserted into the exhaust port 21 of the exhaust pipe 20 and is press-fitted with the exhaust pipe 20 so that the plug 10 is installed in the exhaust pipe 20. Then, the plug 10 is pushed into the exhaust pipe 20 along the axial direction of the exhaust pipe 20, and the plug 10 is rotated at the same time so that the closed end of the plug 10 can gradually extend into the exhaust pipe 20 until the stepped surface 114 overlaps the end face of the exhaust pipe 20 with the exhaust port 21.

[0088] By setting the stepped surface 114 to overlap the end face of the exhaust pipe 20 with the exhaust port 21, the positioning and assembly of the plug 10 and the exhaust pipe 20 can be achieved. The open end of the cover 11 extends out of the exhaust pipe 20, which ensures that the open end is always located outside the exhaust pipe 20, making it convenient to install and remove the plug 10.

[0089] Please refer to the following: Figure 9 In some embodiments of this application, the cover 10 further includes a windbreak rib 12, which is connected to the opening end of the cover 11, and the orthographic projection of the windbreak rib 12 on the cover 11 at least covers part of the opening of the cover 11.

[0090] The orthographic projection of the windbreak rib 12 onto the cover 11 refers to the projection of the windbreak rib 12 onto the plane containing the opening of the cover 11 in a direction opposite to the axial direction X of the cover 11. The windbreak rib 12 can be a closed-loop structure, or a semi-open ring structure, or it can include several wind-blocking parts, all of which are arranged circumferentially along the cover 11, and the orthographic projection of each wind-blocking part onto the cover 11 at least covers a portion of the opening of the cover 11.

[0091] When external wind blows towards the cover 10 in the opposite direction to the axial direction X of the cover 11, the external wind cannot enter the exhaust pipe 20 from the exhaust port 21 in the opposite direction to the axial direction X of the cover 11 due to the wind-blocking effect of the end plate 115 and the wind baffle 12 on the cover 10, thus achieving a good windproof effect.

[0092] In some embodiments of this application, the wind deflector 12 is arranged circumferentially around the cover 11, and the wind deflector 12 extends in a direction toward the central axis L of the cover 11.

[0093] Specifically, the wind deflector 12 is a closed-loop structure and is arranged along the circumference of the cover 11. This type of wind deflector 12 can block external natural wind blowing in the opposite direction to the axial direction X of the cover 11 along the circumference of the cover 11, resulting in better wind protection and reducing the failure rate of the gas water heater 1000, thus extending the service life of the gas water heater 1000.

[0094] Please refer to it again. Figure 1 and Figure 8 This application also provides a smoke exhaust assembly 100, which includes a smoke exhaust pipe 20 and a plug 10 as described in any of the above embodiments. The smoke exhaust pipe 20 has a smoke exhaust port 21. The closed end of the cover 11 is used to block the smoke exhaust port 21. One opening of the smoke guide groove 111 is connected to the interior of the smoke exhaust pipe 20, and the other opening of the smoke guide groove 111 is connected to the outside.

[0095] The smoke exhaust assembly 100 described above has all the beneficial effects of the plug 10 described above, which will not be elaborated here.

[0096] This application also provides a gas water heater 1000, which includes a main body 200 and a flue gas assembly 100. The main body 200 has a combustion chamber, and the end of the flue gas pipe 20 of the flue gas assembly 100 away from the cover 11 is connected to the combustion chamber.

[0097] The gas water heater 1000 described above has all the beneficial effects of the plug 10 described above, which will not be elaborated here.

[0098] The aforementioned cover 10, exhaust assembly 100, and gas water heater 1000, in this application, by setting a smoke guide groove 111 extending in a direction intersecting the axial direction X of the cover 11, when external wind blows in a direction opposite to the axial direction X of the cover 11, the blocking effect is also better due to the blocking effect of the end plate 115. When external wind blows in the direction of gravity, since the closed end is located inside the exhaust pipe 20, the wind cannot blow into the exhaust pipe 20 due to the blocking effect of the outer wall of the exhaust pipe 20. When external wind blows in a downward direction, the blocking effect of the bottom wall 1111 and the side wall of the smoke guide groove 111 can also cause a large loss of wind energy, and the difficulty of the wind changing direction and entering the exhaust pipe 20 along the extension direction of the smoke guide groove 111 increases. In this way, wind blowing from multiple directions can be effectively blocked, with a better windproof effect, and the failure of the gas water heater 1000 can also be reduced. In addition, since the two openings of the smoke guide channel 111 are spaced apart along its extension direction, and the smoke guide channel 111 is located at the closed end and is installed in the exhaust pipe 20, rainwater falling along the direction of gravity or tilting downward is less likely to enter the exhaust pipe 20 through the openings of the smoke guide channel 111 along its extension direction, thus having a better rainproof effect.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A plug, characterized in that, The cover includes a hollow cover (11) with one end open and the other end closed. The closed end of the cover (11) is used to block the exhaust port (21) of the exhaust pipe (20). A smoke guide groove (111) is provided on the side wall of the cover (11). The smoke guide groove (111) is located at the closed end and extends in a direction intersecting the axial direction (X) of the cover (11). The smoke guide channel (111) has two openings that are arranged opposite to each other along its extension direction. One of the openings of the smoke guide channel (111) is connected to the interior of the smoke exhaust pipe (20), and the other opening of the smoke guide channel (111) is connected to the outside. The cover (11) has a plurality of drain holes (112) on its side wall. Each drain hole (112) is at least partially located at the opening end of the cover (11) and at least partially exposed outside the exhaust pipe (20). All the drain holes (112) are spaced apart along the circumference of the cover (11). The smoke guide grooves (111) are multiple and arranged around the circumference of the cover (11), and correspond one-to-one with all the drain holes (112). Each smoke guide groove (111) is connected to the outside through its corresponding drain hole (112). The cover (11) has a drainage channel (113) extending circumferentially along the side wall of the cover (11), and each drainage hole (112) is connected to the drainage channel (113). The sidewall has a double-layer structure, including an inner layer and an outer layer that is circumferentially arranged around the inner layer and connected to the inner layer. The inner layer and the outer layer define the drainage channel (113). Each drainage hole (112) is arranged on the outer layer of the sidewall and penetrates the inner and outer surfaces of the outer layer, and communicates with the drainage channel (113).

2. The plug according to claim 1, characterized in that, The drainage channel (113) is positioned relative to each of the smoke guide channels (111) and close to the central axis (L) of the cover (11).

3. The plug according to claim 1, characterized in that, Along the flue gas emission direction of the flue gas guide channel (111), the bottom wall (1111) of each flue gas guide channel (111) gradually approaches the central axis (L) of the cover (11).

4. The plug according to claim 1, characterized in that, The closed end of the cover (11) is nested inside the exhaust pipe (20) and is press-fitted with the exhaust pipe (20), while the open end of the cover (11) extends out of the exhaust pipe (20). The outer peripheral surface of the closed end of the cover (11) is recessed relative to the outer peripheral surface of the open end of the cover (11) and together with the outer peripheral surface of the open end of the cover (11) to form a stepped surface (114), and the stepped surface (114) overlaps the end face of the exhaust pipe (20) where the exhaust port (21) is opened.

5. The plug according to claim 1, characterized in that, The cover also includes a windbreak rib (12), which is connected to the opening end of the cover body (11), and the orthographic projection of the windbreak rib (12) on the cover body (11) covers at least part of the opening of the cover body (11).

6. The plug according to claim 5, characterized in that, The windbreak rib (12) is arranged around the circumference of the cover (11), and the windbreak rib (12) extends in the direction of the central axis (L) of the cover (11).

7. The plug according to claim 1, characterized in that, The drainage channel (113) is located at the closed end of the cover (11).

8. The plug according to claim 1, characterized in that, The drainage channel (113) is located at the opening end of the cover (11).

9. A smoke extraction assembly, characterized in that, include: The exhaust pipe (20) has an exhaust port (21); as well as As described in any one of claims 1 to 8, the closed end of the cover (11) is used to block the exhaust port (21), and one of the openings of the smoke guide groove (111) is connected to the interior of the exhaust pipe (20), and the other opening of the smoke guide groove (111) is connected to the outside.

10. A gas water heater, characterized in that, include: The main body (200) has a combustion chamber inside; as well as As described in claim 9, the exhaust pipe (20) is connected to the combustion chamber at one end away from the cover (11).

Images