Smoke tube and gas water heater

Abstract

The utility model discloses a smoke pipe and a gas water heater, and relates to the technical field of gas equipment, the smoke pipe comprises a connecting pipe section, an extending pipe section and a transition pipe section; the connecting pipe section is configured to be connected with an outlet pipe of the water heater body; the extending pipe section is configured to be a smoke exhaust pipe hole penetrating through a wall body, and a smoke exhaust hole is formed in the extending pipe section; the transition pipe section is connected with the extending pipe section and the connecting pipe section, the outer diameter of the extending pipe section is smaller than that of the connecting pipe section, and the extending pipe section is matched with a smoke exhaust pipe hole of a wall body. According to the technical scheme provided by the utility model, the problem that a wall body needs to be subjected to reaming treatment during installation can be solved.

Description

Technical Field

[0001] This utility model relates to the field of gas equipment technology, and in particular to a flue and a gas water heater. Background Technology

[0002] Currently, gas-fired instantaneous water heaters are mainly classified into natural draft, natural supply draft, forced draft, and outdoor types based on their exhaust methods. Due to technological advancements, natural draft and natural supply draft types have been largely phased out in China. Among them, forced draft types, because both intake and exhaust air are from outdoors, offer unique safety advantages and are suitable for installation in bathrooms and enclosed rooms, making them popular with consumers. However, due to the limitations of heat load, the outer diameter of the coaxial exhaust pipe in the forced draft type of currently used high-power gas-fired instantaneous water heaters is relatively large, which is incompatible with the exhaust pipe diameter pre-installed in the walls of pre-furnished apartments. Therefore, it is necessary to enlarge the wall opening during installation. Utility Model Content

[0003] The main purpose of this utility model is to propose a flue and a gas water heater, which aims to solve the problem of needing to enlarge the hole in the wall during installation.

[0004] To achieve the above objectives, this utility model proposes a smoke pipe, comprising:

[0005] The connecting pipe section is configured to connect to the outlet pipe of the water heater body;

[0006] The protruding pipe section is configured as a smoke exhaust pipe hole that passes through the wall, and the protruding pipe section is provided with a smoke exhaust hole;

[0007] A transition pipe section connects the connecting pipe section and the extending pipe section. The outer diameter of the extending pipe section is smaller than that of the connecting pipe section, and the extending pipe section is adapted to the smoke exhaust pipe hole of the wall.

[0008] In one embodiment, the inner diameter of the transition pipe section gradually decreases along the direction from the connecting pipe section to the extending pipe section;

[0009] And / or, the outer diameter of the transition pipe section gradually decreases along the direction from the connecting pipe section to the extending pipe section.

[0010] In one embodiment, the connecting pipe section and the extending pipe section are transitioned by a diagonal or arc-shaped transition pipe section.

[0011] In one embodiment, the transition pipe section includes a first arc segment and a second arc segment connected to each other;

[0012] The first arc segment protrudes outward, and the end of the first arc segment away from the second arc segment is connected to the connecting pipe segment by a circular arc transition.

[0013] The second arc segment protrudes inward, and the end of the second arc segment away from the first arc segment is connected to the extended pipe segment by an arc transition.

[0014] In one embodiment, the length of the transition pipe section is defined as L, which satisfies: 40mm≤L≤200mm.

[0015] In one embodiment, the connecting pipe section includes an outer pipe connecting section and an inner pipe connecting section. The outer pipe connecting section is configured to connect to the outer pipe of the water heater body, and the inner pipe connecting section is configured to connect to the inner pipe of the water heater body.

[0016] The protruding pipe section includes an outer pipe protruding section and an inner pipe protruding section, wherein the outer pipe protruding section is configured as a smoke exhaust pipe hole that passes through the wall.

[0017] The transition pipe section includes an outer pipe transition section and an inner pipe transition section; the outer pipe transition section connects the outer pipe connecting section and the outer pipe extension section, forming an outer pipe; the inner pipe transition section connects the inner pipe connecting section and the inner pipe extension section, forming an inner pipe; the outer pipe is sleeved on the inner pipe and forms an air intake channel with the inner pipe; the outer pipe extension section is provided with an air intake hole communicating with the air intake channel; the inner pipe is provided with a smoke exhaust channel; the inner pipe extension section is provided with a smoke exhaust hole communicating with the smoke exhaust channel.

[0018] Wherein, the outer diameter of the outer tube extension section is smaller than the outer diameter of the outer tube connection section, and the outer diameter of the inner tube extension section is smaller than the outer diameter of the inner tube connection section.

[0019] In one embodiment, a support bracket is provided between the outer tube extension section and the inner tube extension section.

[0020] In one embodiment, the outer pipe extension section includes a first outer pipe extension section and a second outer pipe extension section connected to each other. The first outer pipe extension section is connected to the outer pipe transition section, and the second outer pipe extension section is configured as a smoke exhaust pipe hole passing through the wall and is provided with the air inlet hole.

[0021] The inner tube extension section includes a first inner tube extension section and a second inner tube extension section connected to each other. The first inner tube extension section is connected to the inner tube transition section. The second inner tube extension section is provided with the smoke exhaust hole. The first outer tube extension section is sleeved on the first inner tube extension section, and the second outer tube extension section is sleeved on the second inner tube extension section.

[0022] In one embodiment, the first protruding section of the outer tube is at least partially inserted into one end of the second protruding section of the outer tube and is sealed to the second protruding section of the outer tube;

[0023] And / or, the first protruding section of the inner tube is at least partially inserted into one end of the second protruding section of the inner tube and is sealed to the second protruding section of the inner tube.

[0024] In one embodiment, the end of the first protruding section of the outer tube away from the transition section of the outer tube is provided with an inwardly recessed section of the outer tube;

[0025] And / or, the second extension of the outer tube is inserted into one end of the first extension of the outer tube, which is provided with an outer tube expansion section;

[0026] And / or, the end of the first protruding section of the inner tube away from the transition section of the inner tube is provided with an inner tube retracting section;

[0027] And / or, the second extension section of the inner tube is inserted into one end of the first extension section of the inner tube, which is provided with an outer expansion section of the inner tube.

[0028] To achieve the above objectives, this utility model also proposes a gas water heater, comprising:

[0029] A water heater body, wherein the water heater body has an outlet pipe;

[0030] As described above, the connecting section of the flue is connected to the outlet pipe.

[0031] The present application proposes one or more technical solutions, which have at least the following technical effects: The flue pipe proposed in this application includes a connecting pipe section, an extending pipe section, and a transition pipe section. The transition pipe section connects the extending pipe section and the connecting pipe section, enabling the connecting pipe section with a larger outer diameter to be converted into an extending pipe section with a smaller outer diameter, thus forming a variable-diameter flue pipe. During installation, the connecting pipe section with a larger outer diameter can be connected to the outlet pipe of the water heater body, and the extending pipe section with a smaller outer diameter can be inserted through the flue pipe hole in the wall. This allows the extending pipe section with a smaller outer diameter to fit the flue pipe hole in the wall, eliminating the need for wall enlargement. This solves the problem of needing to enlarge the wall during installation, thus saving users the expense of enlarging the hole and avoiding the risk of falling bricks or objects during the enlargement process. Attached Figure Description

[0032] 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.

[0033] Figure 1 A cross-sectional view of an embodiment of the flue provided by this utility model;

[0034] Figure 2 A cross-sectional view of another embodiment of the flue provided by this utility model;

[0035] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0036] Figure 4 A schematic diagram of the structure of an embodiment of the flue provided by this utility model when it is matched with the outlet pipe and the flue hole in the wall;

[0037] Figure 5 A partial structural cross-sectional view of another embodiment of the flue provided by this utility model;

[0038] Figure 6 A partial structural cross-sectional view of another embodiment of the flue provided by this utility model;

[0039] Figure 7 A cross-sectional view of another embodiment of the flue provided by this utility model;

[0040] Figure 8 for Figure 7 A magnified view of a section at point B.

[0041] Explanation of icon numbers:

[0042] label name label name 100 smoke pipe 22a Smoke vent a outer tube 221 First protruding section of the inner tube b Inner tube 2211 Inner tube retraction section c intake channel 222 Second extension section of inner tube d Smoke exhaust duct 2221 Inner tube expansion section 10 Connecting pipe section 30 transition section 11 outer pipe connection section 31 outer pipe transition section 12 Inner pipe connection section 32 Inner tube transition section 20 Extended pipe section 30a First arc segment 21 Outer tube extension section 30b Second arc segment 21a air intake 40 support bracket 211 First extension section of outer tube 200 Outlet tube 2111 Outer tube inner section 210 Outer tube 212 Second extension section of outer tube 220 Outlet tube inner tube 2121 outer pipe expansion section 300 Wall 22 Inner tube extension section 310 Smoke exhaust pipe hole

[0043] 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

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Currently, gas-fired instantaneous water heaters are mainly classified into natural exhaust type, natural air supply exhaust type, forced exhaust type, forced air supply exhaust type, and outdoor type according to their exhaust method. Due to technological advancements, natural exhaust and natural air supply exhaust types have been largely phased out in China. Among them, forced air supply exhaust type has unique safety advantages and is suitable for installation in bathrooms and enclosed rooms because both intake and exhaust air are from outdoors, making it popular with consumers. However, due to the influence of heat load, the outer diameter of the coaxial exhaust pipe of the forced air supply exhaust type currently used in high-power gas-fired instantaneous water heaters is relatively large, usually reaching more than 90mm, while the diameter of the exhaust pipe hole in the wall of a pre-decorated house is usually between 60mm and 70mm. This makes the outer diameter of the coaxial exhaust pipe incompatible with the diameter of the exhaust pipe hole in the wall of the pre-decorated house, requiring wall enlargement treatment during installation.

[0048] For example, the current standard specifications for coaxial flue pipes of forced draft gas water heaters above 16kW are generally 90mm outer diameter and 60mm inner diameter, or 100mm outer diameter and 60mm inner diameter, or an outer diameter exceeding 100mm. Older forced draft gas water heater users generally use a single-layer flue pipe with a diameter of 60mm. If they want to replace it with a forced draft gas water heater, they must enlarge the hole in the wall. Generally, the flue holes of gas water heaters in newly renovated commercial housing are also mostly designed for flue pipes with a diameter of 60mm, which leads to the same problem of needing to enlarge the hole in the wall for new installation users.

[0049] While existing technologies disclose the use of an outer pipe and an inner pipe in a nested arrangement to achieve the functions of air intake and smoke exhaust, the exhaust pipe composed of the outer and inner pipes is a pipe of the same diameter. However, since it is necessary to achieve both air intake and smoke exhaust functions, and gas water heaters are usually manufactured according to process and cost requirements, pipes of the same diameter are usually used as exhaust pipes. The outer diameter of this exhaust pipe usually needs to be set to be relatively large (for example, more than 90mm). However, the diameter of the exhaust pipe hole reserved in the wall of a typical fully furnished apartment is between 60 and 70mm, which requires additional expenses to enlarge the hole. Furthermore, enlarging the hole poses a risk of brick fragments and falling objects from height.

[0050] To address the aforementioned problems, this utility model proposes a flue pipe 100, aiming to solve the issue of requiring enlarged holes in the wall 300 during installation. This flue pipe 100 can be applied to equipment requiring flue gas exhaust, such as gas water heaters and gas-fired heating boilers.

[0051] Please see Figures 1 to 4 In one embodiment of the present invention, the flue 100 includes a connecting pipe section 10, an extending pipe section 20, and a transition pipe section 30.

[0052] The connecting pipe section 10 is configured to connect to the outlet pipe 200 of the water heater body; the extending pipe section 20 is configured to pass through the flue pipe hole 310 of the wall 300, and the extending pipe section 20 is provided with a flue hole 22a; the transition pipe section 30 connects the extending pipe section 20 and the connecting pipe section 10, the outer diameter of the extending pipe section 20 is smaller than the outer diameter of the connecting pipe section 10, and the extending pipe section 20 is adapted to the flue pipe hole 310 of the wall 300.

[0053] In this embodiment, the connecting pipe section 10, the extending pipe section 20, and the transition pipe section 30 are all coaxially arranged to form a coaxial flue 100. The flue 100 may include a single pipe body comprising three sections; alternatively, the flue 100 may include two pipe bodies, which are inner and outer sleeves, and each pipe body comprises three sections. For example, for a forced-draft gas water heater, the flue pipe 100 may include two pipe bodies, namely an outer pipe a and an inner pipe b. The outer pipe a is fitted onto the inner pipe b. The outer pipe a has three segments: an outer pipe connecting segment 11, an outer pipe extension segment 21, and an outer pipe transition segment 31. The inner pipe b has three segments: an inner pipe connecting segment 12, an inner pipe extension segment 22, and an inner pipe transition segment 32. The outer pipe connecting segment 11 is fitted onto the inner pipe connecting segment 12 and can form a connecting pipe segment 10 with the inner pipe connecting segment 12. The outer pipe extension segment 21 is fitted onto the inner pipe extension segment 22 and can form an extension pipe segment 20 with the inner pipe extension segment 22. The outer pipe transition segment 31 is fitted onto the inner pipe transition segment 32 and can form a transition pipe segment 30 with the inner pipe transition segment 32.

[0054] The connecting pipe section 10 is a straight pipe section. The outer diameter of the connecting pipe section 10 is adapted to the outer diameter of the outlet pipe 200 of the water heater body to facilitate the connection between the connecting pipe section 10 and the outlet pipe 200 of the water heater body. For example, the outer diameter of the connecting pipe section 10 can be between 85mm and 125mm, specifically 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 122mm, 125mm, etc. The appropriate size of the connecting pipe section 10 can be selected according to the outer diameter of the outlet pipe 200 of the water heater body; no specific limitation is made here. In practical applications, the connecting pipe section 10 and the outlet pipe 200 of the water heater body can be connected by methods such as plugging, snapping, or welding, as long as a reliable connection between the connecting pipe section 10 and the outlet pipe 200 can be achieved.

[0055] The protruding pipe section 20 is a straight pipe section. The outer diameter of the protruding pipe section 20 is adapted to the size of the smoke exhaust pipe hole 310 of the wall 300, so that the protruding pipe section 20 can be directly inserted into the smoke exhaust pipe hole 310 of the wall 300 without the need to enlarge the smoke exhaust pipe hole 310 of the wall 300. For example, the outer diameter of the protruding pipe section 20 can be between 55mm and 75mm, specifically 55mm, 57mm, 60mm, 62mm, 65mm, 68mm, 69mm, 70mm, 71mm, 75mm, etc. The specific size of the protruding pipe section 20 can be selected according to the size of the smoke exhaust pipe hole 310 reserved in the wall 300, and no specific limitation is made here.

[0056] The transition pipe section 30 is a pipe section with a changing diameter. Using this transition pipe section 30 allows for the smooth connection of the larger outer diameter connecting pipe section 10 to the smaller outer diameter extending pipe section 20. In practical applications, the transition pipe section 30 can be a slanted section, an arc section, a V-shaped section, a U-shaped section, a wavy section, etc., as long as it can connect the larger outer diameter connecting pipe section 10 to the smaller outer diameter extending pipe section 20. Furthermore, the transition pipe section 30 can be connected to the connecting pipe section 10 and the extending pipe section 20 using methods such as insertion, snap-fit, or welding.

[0057] In summary, the flue pipe 100 proposed by this utility model includes a connecting pipe section 10, an extending pipe section 20, and a transition pipe section 30. The transition pipe section 30 connects the extending pipe section 20 and the connecting pipe section 10, and can transfer the connecting pipe section 10 with a larger outer diameter to the extending pipe section 20 with a smaller outer diameter through the transition pipe section 30, so that the connecting pipe section 10, the extending pipe section 20, and the transition pipe section 30 can form a variable diameter flue pipe 100. During installation, a connecting pipe section 10 with a larger outer diameter can be connected to the outlet pipe 200 of the water heater body, and a protruding pipe section 20 with a smaller outer diameter can be inserted into the flue pipe hole 310 of the wall 300 so that the protruding pipe section 20 with a smaller outer diameter can be adapted to the flue pipe hole 310 of the wall 300. Therefore, it is not necessary to enlarge the hole in the wall 300, which solves the problem of needing to enlarge the hole in the wall 300 during installation. Therefore, users do not need to spend extra money to enlarge the hole, and the danger of brick fragments falling from a height can be avoided during the enlargement process.

[0058] Please see Figure 3 In one embodiment of this utility model, the inner diameter of the transition pipe section 30 gradually decreases along the direction from the connecting pipe section 10 to the extending pipe section 20.

[0059] With this design, since the inner side of the transition pipe section 30 needs to be filled with flue gas or external air, by gradually reducing the inner diameter of the transition pipe section 30, the flow of flue gas or external air can be made smoother, and the changes in intake and exhaust resistance caused by the change in the pipe diameter of the transition pipe section 30 can be reduced.

[0060] In practical applications, the variation range of the inner diameter of the transition section 30 can be the same or different.

[0061] It should be noted that when the flue pipe 100 is a single pipe, the inner diameter of the transition pipe section 30 is the inner diameter of that pipe section; when the flue pipe 100 is two pipes, the transition pipe section 30 includes an outer pipe transition section 31 and an inner pipe transition section 32, and the inner diameters of the outer pipe transition section 31 and the inner pipe transition section 32 are both the inner diameters of the transition pipe section 30.

[0062] Please see Figure 3 In one embodiment of this utility model, the outer diameter of the transition pipe section 30 gradually decreases along the direction from the connecting pipe section 10 to the extending pipe section 20.

[0063] This configuration ensures that the thickness of the transition pipe section 30 remains consistent at all locations, guaranteeing its strength. Additionally, it allows for smoother airflow through the outside of the transition pipe section 30, reducing changes in intake resistance caused by variations in the pipe diameter.

[0064] In practical applications, the outer diameter variation range of the transition section 30 can be the same or different.

[0065] It should be noted that when the flue pipe 100 is a single pipe, the outer diameter of the transition pipe section 30 is the outer diameter of that pipe section; when the flue pipe 100 is two pipes, the transition pipe section 30 includes an outer pipe transition section 31 and an inner pipe transition section 32, and the outer diameters of the outer pipe transition section 31 and the inner pipe transition section 32 are both the outer diameters of the transition pipe section 30.

[0066] In practical applications, the transition pipe section 30 can be a slanted section, an arc section, or a sawtooth section, as long as the inner diameter and / or outer diameter of the transition pipe section 30 can be gradually reduced along the direction from the connecting pipe section 10 to the extending pipe section 20.

[0067] Please see Figures 1 to 3 In one embodiment of this utility model, the connecting pipe section 10 and the extending pipe section 20 are connected by a transition pipe section 30 with an oblique or arc transition.

[0068] This design, using a diagonal or curved transition in the transition pipe section 30 to connect the connecting pipe section 10 and the extending pipe section 20, allows for smoother flow of flue gas or external air through the transition pipe section 30, further reducing changes in intake and exhaust resistance caused by variations in the diameter of the transition pipe section 30. Furthermore, the diagonal or curved transition design simplifies the manufacturing process of the transition pipe section 30, making it easier to form; and compared to serrated designs, the diagonal or curved transition design results in less stress concentration, ensuring the strength of the transition pipe section 30 itself.

[0069] In practical applications, the transition section 30 can be connected to the connecting section 10 and the extending section 20 by either a circular arc or an angled transition. Of course, to reduce intake and exhaust resistance, a circular arc transition can be used between the transition section 30 and the connecting section 10 and the extending section 20.

[0070] Please see Figure 3 In one embodiment of the present invention, the transition pipe section 30 includes a first arc segment 30a and a second arc segment 30b connected to each other; the first arc segment 30a protrudes outward, and the end of the first arc segment 30a away from the second arc segment 30b is connected to the connecting pipe section 10 in an arc transition; the second arc segment 30b protrudes inward, and the end of the second arc segment 30b away from the first arc segment 30a is connected to the extending pipe section 20 in an arc transition.

[0071] In this embodiment, the outwardly protruding first arc segment 30a and the inwardly protruding second arc segment 30b can form a transition pipe segment 30 with an S-shaped cross-section.

[0072] The first arc segment 30a is a pipe segment whose diameter gradually decreases along the direction from the connecting pipe segment 10 to the extending pipe segment 20. The diameter change of the first arc segment 30a first increases and then decreases. The second arc segment 30b is also a pipe segment whose diameter gradually decreases along the direction from the connecting pipe segment 10 to the extending pipe segment 20. The diameter change of the second arc segment 30b first decreases and then increases. In practical applications, the first arc segment 30a and the second arc segment 30b can be an integral structure, such as an integral structure that is injection molded, welded, or bonded together; of course, the first arc segment 30a and the second arc segment 30b can also be separate structures, such as separate structures that are connected by plug-in, snap-fit, or interference fit.

[0073] This configuration, using an outwardly protruding first arc segment 30a to achieve a circular arc transition connection with the connecting pipe segment 10, and an inwardly protruding second arc segment 30b to achieve a circular arc transition connection with the extending pipe segment 20, minimizes changes in intake and exhaust resistance caused by variations in the diameter of the transition pipe segment 30. Furthermore, the design using the first arc segment 30a and the second arc segment 30b in combination simplifies the manufacturing process of the transition pipe segment 30 and makes it easier to form.

[0074] Please see Figure 1 , Figure 2 In one embodiment of this utility model, the length of the transition pipe section 30 is defined as L, which satisfies: 40mm≤L≤200mm.

[0075] In this embodiment, the length of the transition pipe section 30 refers to the axial length of the transition pipe section 30.

[0076] This design has several drawbacks. If the length of the transition pipe section 30 is too long, it will result in an excessively long flue pipe 100, causing inconvenience in actual installation. Conversely, if the length of the transition pipe section 30 is too short, it will result in an excessively large change in the slope of the transition pipe section 30, which can easily generate large ventilation resistance and lead to incomplete combustion when the burner body is working. Therefore, controlling the length of the transition pipe section 30 to between 40mm and 200mm can effectively solve the above problems.

[0077] As some examples, the length of the transition pipe section 30 can be 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, etc.

[0078] Please see Figure 1 , Figure 2In one embodiment of this utility model, the connecting pipe section 10 includes an outer pipe connecting section 11 and an inner pipe connecting section 12. The outer pipe connecting section 11 is configured to connect to the outer pipe 210 of the water heater body, and the inner pipe connecting section 12 is configured to connect to the inner pipe 220 of the water heater body. The extending pipe section 20 includes an outer pipe extending section 21 and an inner pipe extending section 22. The outer pipe extending section 21 is configured to pass through the exhaust pipe hole 310 of the wall 300. The transition pipe section 30 includes an outer pipe transition section. The outer pipe transition section 31 and the inner pipe transition section 32 are connected; the outer pipe transition section 31 connects the outer pipe connecting section 11 and the outer pipe extension section 21, and forms the outer pipe a; the inner pipe transition section 32 connects the inner pipe connecting section 12 and the inner pipe extension section 22, and forms the inner pipe b; the outer pipe a is sleeved on the inner pipe b and forms an air intake channel c with the inner pipe b; the outer pipe extension section 21 is provided with an air intake hole 21a that connects to the air intake channel c; the inner pipe b is provided with a smoke exhaust channel d; the inner pipe extension section 22 is provided with a smoke exhaust hole 22a that connects to the smoke exhaust channel d.

[0079] Among them, the outer diameter of the outer tube extension section 21 is smaller than the outer diameter of the outer tube connection section 11, and the outer diameter of the inner tube extension section 22 is smaller than the outer diameter of the inner tube connection section 12.

[0080] In this embodiment, the outer pipe connecting section 11, the outer pipe extending section 21, and the outer pipe transition section 31 constitute a pipe body, which is the outer pipe a; the inner pipe connecting section 12, the inner pipe extending section 22, and the inner pipe transition section 32 constitute a pipe body, which is the inner pipe b; the outer pipe a is sleeved on the inner pipe b and is coaxially arranged with the inner pipe b; an air intake channel c is formed between the inner side wall of the outer pipe a and the outer side wall of the inner pipe b; external air can enter the air intake channel c through the air intake hole 21a, and then be introduced into the water heater body through the air intake channel c to provide the air required for combustion of the water heater body; a smoke exhaust channel d is formed inside the inner pipe b, so that the smoke generated when the water heater body is working can be discharged to the outside through the smoke exhaust channel d and the smoke exhaust hole 22a.

[0081] The outer pipe connection section 11 is a straight pipe section. The outer diameter of the outer pipe connection section 11 is adapted to the outer diameter of the outer pipe 210 of the water heater body to facilitate the connection between the outer pipe connection section 11 and the outer pipe 210 of the water heater body. For example, the outer diameter of the outer pipe connection section 11 can be between 85mm and 125mm, specifically 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 122mm, 125mm, etc. The corresponding size of the outer pipe connection section 11 can be selected according to the outer diameter of the outer pipe 210 of the water heater body, and no specific limitation is made here.

[0082] The inner pipe connecting section 12 is also a straight pipe section. The outer diameter of the inner pipe connecting section 12 is adapted to the outer diameter of the inner pipe 220 of the water heater body's outlet pipe, so as to facilitate the connection between the inner pipe connecting section 12 and the inner pipe 220 of the water heater body. For example, the outer diameter of the inner pipe connecting section 12 can be between 55mm and 75mm, specifically 55mm, 57mm, 60mm, 62mm, 65mm, 68mm, 69mm, 70mm, 71mm, 75mm, etc. The specific size of the inner pipe connecting section 12 can be selected according to the outer diameter of the inner pipe 220 of the water heater body, and no specific limitation is made here.

[0083] The outer pipe extension section 21 is also a straight pipe section. The outer diameter of the outer pipe extension section 21 is adapted to the size of the smoke exhaust pipe hole 310 of the wall 300, so that the outer pipe extension section 21 can be directly inserted into the smoke exhaust pipe hole 310 of the wall 300 without the need to enlarge the smoke exhaust pipe hole 310 of the wall 300. For example, the outer diameter of the outer pipe extension section 21 can be between 55mm and 75mm, specifically 55mm, 57mm, 60mm, 62mm, 65mm, 68mm, 69mm, 70mm, 71mm, 75mm, etc. The specific size of the outer pipe extension section 21 can be selected according to the size of the smoke exhaust pipe hole 310 reserved in the wall 300, and no specific limitation is made here.

[0084] The inner tube extension section 22 is also a straight pipe section. The outer diameter of the inner tube extension section 22 can be between 35mm and 65mm, specifically 35mm, 37mm, 40mm, 42mm, 45mm, 50mm, 55mm, 60mm, 61mm, 65mm, etc. In this way, when the outer tube extension section 21 is fitted onto the inner tube extension section 22, a sufficient gap can be maintained between the outer tube extension section 21 and the inner tube extension section 22 to allow external air to pass through, thereby reducing air intake resistance.

[0085] In some embodiments, the inner pipe extension 22 is much longer than the outer pipe extension 21, meaning a section of the inner pipe extension 22 extends beyond the outer pipe extension 21. This allows the exhaust port 22a to be designed on the outer wall of the inner pipe extension 22 that extends beyond the outer pipe extension 21, creating a distance between the exhaust port 22a and the end of the outer pipe extension 21. This design reduces the flow of high-temperature flue gas from the exhaust port 22a towards the end of the outer pipe extension 21, preventing excessive icing at the end of the outer pipe extension 21 in cold weather and effectively solving the problem of ice blockage at the exhaust port 22a. Of course, to avoid making the flue pipe 100 too long, increasing transportation costs, and affecting the aesthetics of the installation wall 300, the distance between the exhaust port 22a and the end of the outer pipe extension 21 can be controlled between 20mm and 25mm, specifically 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, etc.

[0086] The end of the outer tube extension section 21 is provided with a sealing ring to seal the end opening of the air intake channel c. Several spaced air intake holes 21a are provided on the outer wall of the outer tube extension section 21 near the end. The cross-sectional shape of the air intake hole 21a can be circular, elliptical, rectangular, triangular, pentagonal, hexagonal, etc., as long as it ensures that external air can smoothly enter the air intake channel c through the air intake hole 21a. In some embodiments, the cross-sectional shape of the air intake hole 21a is circular, and the diameter of the air intake hole 21a can be between 4mm and 16mm, specifically 4mm, 6mm, 8mm, 9mm, 10mm, 11mm, 12mm, 14mm, 15mm, 16mm, etc.

[0087] The end of the inner tube extension section 22 is also provided with a sealing ring to seal the end of the smoke exhaust channel d. Several spaced smoke exhaust holes 22a are provided on the outer wall of the inner tube extension section 22 near the end. The cross-sectional shape of the smoke exhaust holes 22a can be circular, elliptical, rectangular, triangular, pentagonal, hexagonal, etc., as long as it ensures that the smoke flowing through the smoke exhaust channel d can be smoothly discharged outwards through the smoke exhaust holes 22a. In some embodiments, the cross-section of the smoke exhaust hole 22a is circular, and the diameter of the smoke exhaust hole 22a can be between 4mm and 16mm, specifically 4mm, 6mm, 8mm, 9mm, 10mm, 11mm, 12mm, 14mm, 15mm, 16mm, etc.

[0088] Please see Figure 1 , Figure 2 In one embodiment of this utility model, a support bracket 40 is provided between the outer tube extension section 21 and the inner tube extension section 22.

[0089] In this embodiment, the support bracket 40 can be a ring-shaped support frame or multiple support blocks spaced circumferentially along the inner tube extension section 22, as long as they can effectively support the outer tube extension section 21 and the inner tube extension section 22. By using the support bracket 40 to support the outer tube extension section 21 and the inner tube extension section 22, the coaxial effect between the outer tube extension section 21 and the inner tube extension section 22 can be ensured, thereby keeping the gap between the outer tube extension section 21 and the inner tube extension section 22 consistent, allowing external air to flow smoothly through the air intake channel c.

[0090] In practical applications, the support bracket 40 can be connected to the inner wall of the outer tube extension section 21, the outer wall of the inner tube extension section 22, or both. Furthermore, one or at least two support brackets 40 can be provided along the length of the outer tube extension section 21 to effectively support both the outer tube extension section 21 and the inner tube extension section 22.

[0091] Please see Figures 5 to 8 In one embodiment of this utility model, the outer tube extension section 21 includes a first outer tube extension section 211 and a second outer tube extension section 212 connected to each other. The first outer tube extension section 211 is connected to the outer tube transition section 31. The second outer tube extension section 212 is configured to pass through the smoke exhaust pipe hole 310 in the wall 300 and is provided with an air inlet hole 21a. The inner tube extension section 22 includes a first inner tube extension section 221 and a second inner tube extension section 222 connected to each other. The first inner tube extension section 221 is connected to the inner tube transition section 32. The second inner tube extension section 222 is provided with a smoke exhaust hole 22a. The first outer tube extension section 211 is sleeved on the first inner tube extension section 221, and the second outer tube extension section 212 is sleeved on the second inner tube extension section 222.

[0092] In this embodiment, the first extension section 211 and the second extension section 212 of the outer tube are detachably connected. Specifically, the first extension section 211 and the second extension section 212 of the outer tube can be connected together by means of plug-in connection, threaded connection, snap-fit ​​connection, etc. The second extension section 212 of the outer tube passes through the flue pipe hole 310 of the wall 300 and extends out of the wall 300. The end of the first extension section 211 of the outer tube is connected to the second extension section 212 of the outer tube extending out of the wall 300. External air enters the air intake channel c from the air intake hole 21a and enters the interior of the water heater body from the outlet pipe 210 of the water heater body along the air intake channel c, providing the air required for combustion of the water heater body.

[0093] The first extension section 221 and the second extension section 222 of the inner tube are also detachably connected. Specifically, the first extension section 221 and the second extension section 222 of the inner tube can be connected together by means of plug-in connection, threaded connection, snap-fit ​​connection, etc. The second extension section 222 of the inner tube passes through the second extension section 212 of the outer tube and extends out of the wall 300. The end of the first extension section 221 of the inner tube is connected to the second extension section 222 of the inner tube extending out of the wall 300. The flue gas generated by the combustion of the water heater body enters the flue gas passage d and is finally discharged outward from the flue gas hole 22a of the second extension section 222 of the inner tube.

[0094] With this configuration, during transportation, the outer tube extension 21 can be split into a first outer tube extension 211 and a second outer tube extension 212, and the inner tube extension 22 can be split into a first inner tube extension 221 and a second inner tube extension 222. This reduces the length of the flue 100 during transportation, thereby reducing transportation costs. During installation, the first outer tube extension 211 and the second outer tube extension 212 can be directly reconnected, and the first inner tube extension 221 and the second inner tube extension 222 can be reconnected. Furthermore, during manufacturing, the first outer tube extension 211, the second outer tube extension 212, the first inner tube extension 221, and the second inner tube extension 222 can be manufactured separately, thus reducing the complexity of the manufacturing process.

[0095] Please see Figure 8 In one embodiment of the present invention, the first extension section 211 of the outer tube is at least partially inserted into one end of the second extension section 212 of the outer tube and is sealed to the second extension section 212 of the outer tube.

[0096] In this embodiment, the outer diameter of the first protruding section 211 of the outer tube is less than or equal to the inner diameter of the second protruding section 212 of the outer tube. This facilitates at least partial insertion of the first protruding section 211 into one end of the second protruding section 212. In practical applications, the first protruding section 211 can be partially inserted into one end of the second protruding section 212, or it can be fully inserted into one end of the second protruding section 212. The first protruding section 211 and the second protruding section 212 are sealed together. It is understood that there is no air leakage between the first protruding section 211 and the second protruding section 212. Specifically, a gapless design can be used between the first protruding section 211 and the second protruding section 212, or a sealing ring can be used to seal between them.

[0097] With this configuration, during disassembly, the first protruding section 211 of the outer tube can be directly pulled out from the second protruding section 212 of the outer tube, and during installation, the first protruding section 211 of the outer tube can be at least partially inserted into one end of the second protruding section 212 of the outer tube, thus facilitating the disassembly and assembly of the first protruding section 211 of the outer tube and the second protruding section 212 of the outer tube.

[0098] Please see Figure 8 In one embodiment of the present invention, the first extension section 221 of the inner tube is at least partially inserted into one end of the second extension section 222 of the inner tube and is sealed to the second extension section 222 of the inner tube.

[0099] In this embodiment, the outer diameter of the first protruding section 221 of the inner tube is less than or equal to the inner diameter of the second protruding section 222 of the inner tube. This facilitates at least partial insertion of the first protruding section 221 into one end of the second protruding section 222. In practical applications, the first protruding section 221 can be partially inserted into one end of the second protruding section 222, or it can be fully inserted into one end of the second protruding section 222. The first protruding section 221 and the second protruding section 222 of the inner tube are sealed together. It is understood that there is no air leakage between the first protruding section 221 and the second protruding section 222. Specifically, a gapless design can be used between the first protruding section 221 and the second protruding section 222, or a sealing ring can be used to seal the connection between them.

[0100] With this configuration, during disassembly, the first protruding section 221 of the inner tube can be directly pulled out from the second protruding section 222 of the inner tube, and during installation, the first protruding section 221 of the inner tube can be at least partially inserted into one end of the second protruding section 222 of the inner tube, thus facilitating the disassembly and assembly of the first protruding section 221 of the inner tube and the second protruding section 222 of the inner tube.

[0101] Please see Figure 8 In one embodiment of the present invention, the end of the first extension section 211 of the outer tube away from the transition section 31 of the outer tube is provided with an inner retraction section 2111.

[0102] In this embodiment, the outer diameter of the inner constriction section 2111 of the outer tube is smaller than the outer diameter of the first protruding section 211 of the outer tube.

[0103] With this configuration, during installation, the inner section 2111 of the outer tube can act as a guide section, so that the outer tube extension section 21 can be smoothly inserted into one end of the second extension section 212 of the outer tube under the guidance of the inner section 2111.

[0104] Please see Figure 8In one embodiment of the present invention, the second extension section 212 of the outer tube is inserted into one end of the first extension section 211 of the outer tube and is provided with an outer tube expansion section 2121.

[0105] In this embodiment, the inner diameter of the outer tube expansion section 2121 is greater than the inner diameter of the second extension section 212 of the outer tube.

[0106] With this configuration, during installation, the outer tube expansion section 2121 can also serve as a guide section, so that the outer tube extension section 21 can be smoothly inserted into one end of the second extension section 212 of the outer tube under the guidance of the outer tube expansion section 2121.

[0107] In some embodiments, the outer tube extension section 21 can be more easily inserted into one end of the second extension section 212 of the outer tube under the joint guidance of the inner retracted section 2111 and the outer tube expansion section 2121.

[0108] Please see Figure 8 In one embodiment of the present invention, the end of the first protruding section 221 of the inner tube away from the transition section 32 of the inner tube is provided with an inner tube retracting section 2211.

[0109] In this embodiment, the outer diameter of the inner tube constriction section 2211 is smaller than the outer diameter of the inner tube first extension section 221.

[0110] With this configuration, during installation, the inner tube retracted section 2211 can act as a guide section, allowing the inner tube protrusion section 22 to be smoothly inserted into one end of the second protrusion section 222 of the inner tube under the guidance of the inner tube retracted section 2211.

[0111] Please see Figure 8 In one embodiment of the present invention, the second extension section 222 of the inner tube is inserted into one end of the first extension section 221 of the inner tube and is provided with an outer expansion section 2221 of the inner tube.

[0112] In this embodiment, the inner diameter of the outer expansion section 2221 of the inner tube is greater than the inner diameter of the second extension section 222 of the inner tube.

[0113] With this configuration, during installation, the inner tube expansion section 2221 can also serve as a guide section, so that the inner tube extension section 22 can be smoothly inserted into one end of the second extension section 222 of the inner tube under the guidance of the inner tube expansion section 2221.

[0114] In some embodiments, the inner tube extension section 22 can be more smoothly inserted into one end of the second extension section 222 of the inner tube under the joint guidance of the inner tube retracting section 2211 and the inner tube expanding section 2221.

[0115] This utility model also proposes a gas water heater, which includes a water heater body and a flue pipe 100. The specific structure of the flue pipe 100 is as described in the above embodiments. Since this gas water heater 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. The water heater body has an outlet pipe 200; the connecting pipe section 10 of the flue pipe 100 is connected to the outlet pipe 200.

[0116] In some embodiments, the outlet pipe 200 of the water heater body can be a 90-degree corrugated bend. The outlet pipe 200 includes an outer outlet pipe 210 and an inner outlet pipe 220. The outer outlet pipe 210 is sleeved on the inner outlet pipe 220 and forms an air inlet chamber with the inner outlet pipe 220. An exhaust chamber is formed inside the inner outlet pipe 220. The air inlet chamber is connected to the air inlet channel c of the flue pipe 100, and the exhaust chamber is connected to the exhaust channel d of the flue pipe 100. Air introduced from the air inlet channel c enters the interior of the water heater body from the air inlet chamber. The flue gas generated by the operation of the water heater body flows from the exhaust chamber to the exhaust channel d and is finally discharged to the outside through the exhaust hole 22a.

[0117] 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 type of flue, characterized in that, include: The connecting pipe section is configured to connect to the outlet pipe of the water heater body; The protruding pipe section is configured as a smoke exhaust pipe hole that passes through the wall, and the protruding pipe section is provided with a smoke exhaust hole; A transition pipe section connects the connecting pipe section and the extending pipe section. The outer diameter of the extending pipe section is smaller than that of the connecting pipe section, and the extending pipe section is adapted to the smoke exhaust pipe hole of the wall.

2. The smoke pipe as described in claim 1, characterized in that, The inner diameter of the transition pipe section gradually decreases along the direction from the connecting pipe section to the extending pipe section; And / or, the outer diameter of the transition pipe section gradually decreases along the direction from the connecting pipe section to the extending pipe section.

3. The smoke pipe as described in claim 2, characterized in that, The connecting pipe section and the extending pipe section are connected by a transition pipe section with an oblique line or an arc.

4. The smoke pipe as described in claim 3, characterized in that, The transition pipe section includes a first arc segment and a second arc segment that are connected to each other; The first arc segment protrudes outward, and the end of the first arc segment away from the second arc segment is connected to the connecting pipe segment by a circular arc transition. The second arc segment protrudes inward, and the end of the second arc segment away from the first arc segment is connected to the extended pipe segment by an arc transition.

5. The smoke pipe as described in any one of claims 1 to 4, characterized in that, If the length of the transition pipe section is defined as L, then the following condition must be met: 40mm≤L≤200mm.

6. The smoke pipe as described in any one of claims 1 to 4, characterized in that, The connecting pipe section includes an outer pipe connecting section and an inner pipe connecting section. The outer pipe connecting section is configured to connect to the outer pipe of the water heater body, and the inner pipe connecting section is configured to connect to the inner pipe of the water heater body. The protruding pipe section includes an outer pipe protruding section and an inner pipe protruding section, wherein the outer pipe protruding section is configured as a smoke exhaust pipe hole that passes through the wall. The transition pipe section includes an outer pipe transition section and an inner pipe transition section; the outer pipe transition section connects the outer pipe connecting section and the outer pipe extension section, forming an outer pipe; the inner pipe transition section connects the inner pipe connecting section and the inner pipe extension section, forming an inner pipe; the outer pipe is sleeved on the inner pipe and forms an air intake channel with the inner pipe; the outer pipe extension section is provided with an air intake hole communicating with the air intake channel; the inner pipe is provided with a smoke exhaust channel; the inner pipe extension section is provided with a smoke exhaust hole communicating with the smoke exhaust channel. Wherein, the outer diameter of the outer tube extension section is smaller than the outer diameter of the outer tube connection section, and the outer diameter of the inner tube extension section is smaller than the outer diameter of the inner tube connection section.

7. The smoke pipe as described in claim 6, characterized in that, A support bracket is provided between the outer tube extension section and the inner tube extension section.

8. The smoke pipe as described in claim 6, characterized in that, The outer pipe extension section includes a first outer pipe extension section and a second outer pipe extension section connected to each other. The first outer pipe extension section is connected to the outer pipe transition section. The second outer pipe extension section is configured as a smoke exhaust pipe hole passing through the wall and is provided with the air inlet hole. The inner tube extension section includes a first inner tube extension section and a second inner tube extension section connected to each other. The first inner tube extension section is connected to the inner tube transition section. The second inner tube extension section is provided with the smoke exhaust hole. The first outer tube extension section is sleeved on the first inner tube extension section, and the second outer tube extension section is sleeved on the second inner tube extension section.

9. The smoke pipe as described in claim 8, characterized in that, The first protruding section of the outer tube is at least partially inserted into one end of the second protruding section of the outer tube, and is sealed to the second protruding section of the outer tube; And / or, the first protruding section of the inner tube is at least partially inserted into one end of the second protruding section of the inner tube and is sealed to the second protruding section of the inner tube.

10. The smoke pipe as described in claim 9, characterized in that, The first protruding section of the outer tube is provided with an inward section at the end away from the transition section of the outer tube; And / or, the second extension of the outer tube is inserted into one end of the first extension of the outer tube, which is provided with an outer tube expansion section; And / or, the end of the first protruding section of the inner tube away from the transition section of the inner tube is provided with an inner tube retracting section; And / or, the second extension section of the inner tube is inserted into one end of the first extension section of the inner tube, which is provided with an outer expansion section of the inner tube.

11. A gas water heater, characterized in that, include: A water heater body, wherein the water heater body has an outlet pipe; The flue pipe as described in any one of claims 1 to 10, wherein the connecting section of the flue pipe is connected to the outlet pipe.

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