Smoke exhaust pipe, smoke exhaust system and gas water heater

Abstract

The present application relates to a kind of flue, flue system and gas water heater.The flue includes pipe body and flue outlet.The pipe body has the first section suitable for being connected with the main body of gas water heater and the second section connected with the first section, the extension direction of the first section forms the angle with the extension direction of the second section, the inner tube wall of the second section at least in its lower side is outwardly recessed to form groove;Flue outlet is formed on the groove wall.Even if the second section of pipe body is obtuse angle with the first section of pipe body due to installation error or wind blowing and other reasons, rainwater entering into the groove through flue outlet can flow to the lowest part of groove under the action of gravity, then flow out through flue outlet on groove, and will not backflow into the main body of gas water heater to cause the service life of flue and the main body of gas water heater to be shortened.Therefore, the flue of the present application can overcome the defect that the flue in the prior art is prone to cause rainwater backflow, leading to the service life of water heater being shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water heaters, in particular to a smoke exhaust pipe, a smoke exhaust system and a gas water heater. BACKGROUND

[0002] The gas water heater, also known as gas water heater, is a kind of gas appliance which uses gas as fuel to heat water by burning. Its advantage is that it can be used immediately without waiting, and it occupies less space. In terms of safety, the gas water heater separates the heat production and heat supply, which is installed in the kitchen while bathing in the bathroom, avoiding the risk of leakage during bathing.

[0003] As shown in Figure 1 and Figure 2 , the existing gas water heater 200' generally discharges the flue gas generated by combustion to the outside through the smoke exhaust pipe 100', which includes a pipe body and a smoke exhaust port 3' arranged on the pipe body in the circumferential direction. The pipe body has a first section 11' connected to the main body of the water heater and extending in the vertical direction, and a second section 12' forming an acute angle with the first section 11'. The applicant found that once the second section 12' of the pipe body forms an obtuse angle with the first section 11' due to processing errors or wind blowing, etc., the rainwater flowing into the smoke exhaust pipe 100' from the smoke exhaust port 3' will flow back to the inside of the main body 201' of the gas water heater along the second section 12'. Since the flue gas discharged by the smoke exhaust pipe 100' usually contains sulfur dioxide and other acidic substances, the water flowing back into the water heater will cause corrosion to the smoke exhaust pipe 100' and the gas water heater 200', resulting in a shortened service life of the gas water heater 200'. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defect that the existing smoke exhaust pipe is prone to cause rainwater backflow, thereby providing a smoke exhaust pipe, a smoke exhaust system and a gas water heater which are not prone to cause rainwater backflow.

[0005] In order to solve the above problems, the present application provides a smoke exhaust pipe, which comprises a pipe body and a smoke exhaust port. The pipe body has a first section adapted to be connected to the main body of a gas water heater and a second section connected to the first section, the extension direction of the first section forms an angle with the extension direction of the second section, and the inner pipe wall of the second section is recessed outward at least on the lower side to form a groove; the smoke exhaust port is formed on the groove wall.

[0006] Further, the groove extends along the circumferential direction of the second section and is annular, and the smoke exhaust ports are uniformly distributed on the groove wall in the circumferential direction.

[0007] Further, the groove wall is arc-shaped in longitudinal section.

[0008] Further, a groove is formed at an end of the second section away from the first section.

[0009] Further, a tube wall of the second section protrudes outward to form a protruding portion, and an inner side of the protruding portion forms the groove.

[0010] Further, the smoke outlet is a strip-shaped hole extending along a length direction of the second section.

[0011] Further, the smoke outlet extends from a middle portion of the protruding portion toward an end away from the first section.

[0012] Further, the smoke outlet extends from a middle portion of the protruding portion toward an end away from the first section.

[0013] Further, the smoke outlet extends from a middle portion of the protruding portion toward an end away from the first section.

[0014] The second aspect of the present application relates to a smoke exhaust system comprising the smoke exhaust pipe of the first aspect of the present application.

[0015] The third aspect of the present application relates to a gas water heater comprising the smoke exhaust pipe of the first aspect of the present application.

[0016] The present application has the following advantages:

[0017] 1. According to the above technical solution, the smoke exhaust pipe of the first aspect of the present application is provided with an outwardly recessed groove at least on the lower side of the second section, and the smoke outlet is arranged on the groove wall. This makes the groove wall act as a flow guide slope to guide the water flow to the groove bottom. Even if the second section of the pipe body is at an obtuse angle with the first section of the pipe body due to installation errors or wind blowing, the rainwater entering the groove through the smoke outlet can flow to the lowest part of the groove under the action of gravity and then flow out through the smoke outlet, without flowing back to the main body of the gas water heater to shorten the service life of the smoke exhaust pipe and the main body of the gas water heater. Therefore, the smoke exhaust pipe of the first aspect of the present application can overcome the defect that the smoke exhaust pipe in the prior art is prone to causing rainwater backflow, which shortens the service life of the water heater. At the same time, the smoke exhaust pipe of the first aspect of the present application has a simple structure, is easy to manufacture, is practical, safe, reliable, and convenient to implement and promote.

[0018] 2. The groove extends along the circumference of the second section and is annular. This makes the groove on the entire circumferential wall of the second section act as a flow guide slope and guide the water flow to the groove bottom, and then make the rainwater flow out through the smoke outlet. This ensures that rainwater is not easily flowed into the main body of the gas water heater regardless of the inclination of the smoke exhaust pipe, which helps to further prolong the service life of the gas water heater. The smoke outlet can be selected to be arranged only on the inner tube wall of the lower side of the second section. In order to reduce the smoke exhaust resistance of the gas water heater and avoid smoke exhaust disorder, the gas water heater is preferably arranged to be uniformly distributed on the groove wall in the circumferential direction.

[0019] 3、The longitudinal section of the groove wall of the groove is circular arc-shaped, which can facilitate the processing of the pipe body. The groove is arranged at the end of the second section away from the first section, which enables the flue gas to directly flow out through the smoke outlet on the groove when flowing to the end of the second section, avoiding the process of flue gas flowing back into the groove to increase the smoke exhaust resistance. The pipe wall of the second section protrudes outward to form a protruding portion, and the inner side of the protruding portion forms a groove, which is simple to process and allows the thickness of the second section to be set thinner and reduces the manufacturing cost of the pipe body. The smoke outlet is a strip-shaped hole extending along the length direction of the second section, and the pipe wall of the second section is arranged to protrude outward, which can facilitate the operator to process the smoke outlet on the pipe wall by milling or cutting, etc., and the process is simple, which helps to improve the production efficiency of the smoke exhaust pipe.

[0020] 4、The smoke outlet is arranged to extend from the middle of the protruding portion towards the direction away from the first section. It can ensure that the protruding portion has sufficient structural strength, and it will not increase the smoke exhaust resistance of the gas water heater due to the small area of the smoke outlet. The smoke outlet in the prior art is generally directly arranged on the second section of the pipe body, which makes the flue gas need to rotate from the direction along the second section of the pipe body to the radial direction of the second section when flowing out through the smoke outlet, which increases the resistance of the smoke exhaust process and easily causes poor smoke exhaust.

[0021] 5、The groove is arranged at the end of the second section away from the first section, which enables the flue gas to smoothly flow out through the smoke outlet without a large deflection when flowing along the second section of the pipe, effectively reducing the smoke exhaust resistance of the smoke exhaust pipe. The smoke exhaust pipe also includes a plug cover that plugs the end of the second section away from the first section. By arranging the plug cover, the purpose of preventing cold air from flowing back can be achieved, and the structure is simple and has good protection effect. Preferably, the pipe body further includes a foldable wrinkle section connected between the first section and the second section. By folding the wrinkle section, the angle between the first section and the second section can be adjusted conveniently and quickly, which facilitates the installation of the gas water heater.

[0022] 6、The second aspect of the present application relates to a smoke exhaust system, which includes the smoke exhaust pipe of the first aspect of the present application, and therefore has the beneficial effects of the smoke exhaust pipe of the first aspect of the present application, i.e. can overcome the defect that the smoke exhaust pipe in the prior art is prone to shortening the service life of the water heater due to rainwater backflow.

[0023] 7、The third aspect of the present application relates to a gas water heater, which includes the smoke exhaust pipe of the first aspect of the present application, and therefore has the beneficial effects of the first aspect of the present application, i.e. can overcome the defect that the smoke exhaust pipe in the prior art is prone to shortening the service life of the water heater due to rainwater backflow. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative work based on these drawings also belong to the protection scope of the present application.

[0025] Figure 1 A gas water heater in the prior art;

[0026] Figure 2 A gas water heater in the prior art; Figure 1 An enlarged view of the smoke outlet in the prior art;

[0027] Figure 3 A sectional view of the smoke exhaust pipe of the gas water heater in the prior art;

[0028] Figure 4 A gas water heater according to Embodiment 3 of the present application;

[0029] Figure 5 A sectional view of the smoke exhaust pipe of the gas water heater according to Embodiment 3 of the present application;

[0030] Figure 6 An enlarged view of A in the prior art; Figure 5

[0031] A sectional view of the recess of the gas water heater according to Embodiment 3 of the present application. Figure 7 Explanation of reference signs:

[0032] 100, smoke exhaust pipe; 11, first section; 12, second section; 13, plug cover; 14, pleated section; 2, recess; 3, smoke outlet;

[0033] 200, gas water heater; 201, main body;

[0034] 100', smoke exhaust pipe; 11', first section; 12', second section; 3', smoke outlet;

[0035] 200', gas water heater.

[0036] DETAILED DESCRIPTION The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work also belong to the protection scope of the present application.

[0037]

[0038] ​In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict between them.

[0041] Example 1

[0042] Figure 4 A gas water heater of the present application embodiment 3. Figure 5 A gas water heater of the present application embodiment 3. Figure 4 And Figure 5 As shown in the drawings, the smoke exhaust pipe 100 of the present embodiment mainly comprises a pipe body and a smoke exhaust port 3. Among them, the pipe body has a first segment 11 adapted to be connected with the main body 201 of the gas water heater 200 and a second segment 12 connected with the first segment 11. The extension direction of the first segment 11 and the extension direction of the second segment 12 form an included angle. The inner tube wall of the second segment 12 at least on the lower side is outwardly recessed to form a groove 2. For example, the second segment 12 can be arranged such that only the inner tube wall on the lower side is outwardly recessed to form a groove, or it can be arranged such that the inner tube wall on the lower side and the upper side is outwardly recessed to form a groove, or it can be arranged such that the inner tube wall is outwardly recessed to form a groove along the circumferential direction. When the second segment 12 is selected to be outwardly recessed only on the inner tube wall of the lower side, the larger the central angle of the groove along the circumferential direction, the more helpful it is to improve the anti-backflow effect of the smoke exhaust pipe 100. The smoke exhaust port 3 is formed on the groove wall 2. The included angle formed by the extension direction of the first segment 11 and the extension direction of the second segment 12 is preferably but not limited to an acute angle. Among them, the main body 201 of the gas water heater 200 is preferably but not limited to composed of valve body assembly, main burner, small fire burner, heat exchanger, safety device and the like, which is well known to those skilled in the art, and will not be described in detail here.

[0043] From the above technical solutions, the smoke exhaust pipe 100 of the embodiment is provided with the outwardly recessed groove 2 at least at the lower side of the second section 12, and the smoke exhaust port 3 is arranged on the groove wall of the groove 2. This makes the groove wall of the groove 2 be able to guide the water flow to the groove bottom of the groove 2 as a flow guide slope surface. Even if the second section 12 of the pipe body is at an obtuse angle with the first section 11 of the pipe body due to installation errors or wind blowing and the like, the rainwater entering the groove 2 through the smoke exhaust port 3 can also flow to the lowest part of the groove 2 under the action of gravity, and then be discharged outward through the smoke exhaust port 3 on the groove 2, and will not flow back to the main body 201 of the gas water heater 200 to shorten the service life of the smoke exhaust pipe 100 and the main body 201 of the gas water heater 200. Therefore, the smoke exhaust pipe 100 of the embodiment can overcome the defect that the smoke exhaust pipe 100' in the prior art is easy to cause rainwater backflow to shorten the service life of the water heater. At the same time, the structure of the smoke exhaust pipe 100 of the embodiment is simple, convenient to manufacture, practical, safe and reliable, and easy to implement and popularize and apply.

[0044] In the embodiment, the groove 2 extends along the circumference of the second section 12 and is annular. This makes the groove 2 on the entire circumferential wall of the second section 12 be able to guide the water flow to the groove bottom of the groove 2 as a flow guide slope surface, and then make the rainwater flow out through the smoke exhaust port 3. It is ensured that no matter how the smoke exhaust pipe 100 is inclined, the rainwater is not easy to flow into the main body 201 of the gas water heater 200, which helps to further prolong the service life of the gas water heater 200. The smoke exhaust port 3 can be selected to be arranged only on the inner pipe wall of the lower side of the second section 12. In order to reduce the smoke exhaust resistance of the gas water heater 200 and avoid smoke exhaust disorder, the smoke exhaust port 3 of the gas water heater 200 is preferably arranged to be uniformly distributed on the groove wall of the groove 2 along the circumference.

[0045] The groove 2 is preferably but not limited to a square, spherical or ellipsoidal groove. For example, in the embodiment, as shown in FIG. 2, the longitudinal section of the groove wall of the groove 2 is a circular arc shape, which can facilitate the processing of the pipe body. Figure 7 The groove 2 is preferably but not limited to arranged at the middle of the second section 12 or at the end of the second section 12 away from the first section 11, and is preferably arranged at the end of the second section 12 away from the first section 11, which makes the flue gas flow out directly through the smoke exhaust port 3 on the groove 2 when flowing to the end of the second section 12, avoiding the process of flue gas flowing back into the groove 2 to increase the smoke exhaust resistance.

[0046] The groove 2 can be formed in the inner wall of the second section 12 by digging. In this embodiment, the pipe wall of the second section 12 protrudes outward to form a protruding portion, and the inner side of the protruding portion forms the groove 2. This processing method is simple, and allows the thickness of the second section 12 to be set thinner and reduces the manufacturing cost of the pipe body. The smoke outlet 3 is preferably but not limited to a circular hole or a square hole, etc. In this embodiment, the smoke outlet 3 is a strip-shaped hole extending along the length direction of the second section 12. The pipe wall of the second section 12 is set to protrude outward, which can facilitate the operator to process the smoke outlet 3 on the pipe wall by milling or cutting, etc. The process is simple, which helps to improve the production efficiency of the smoke exhaust pipe 100.

[0047] The smoke outlet 3 can extend from one side of the protruding portion to the other side of the protruding portion, or can be arranged at any one side of the protruding portion. In this embodiment, the smoke outlet 3 is arranged to extend from the middle of the protruding portion towards the direction away from the first section 11. This can ensure that the protruding portion has sufficient structural strength, and also does not increase the smoke exhaust resistance of the gas water heater 200 due to the small area of the smoke outlet 3. As shown in Figure 3 The smoke outlet 3' in the prior art is generally arranged directly on the second section 12' of the pipe body, which makes the flue gas need to rotate from the direction along the second section 12' of the pipe body to the radial direction of the second section 12' when being discharged through the smoke outlet 3, which increases the resistance of the smoke exhaust process and easily causes poor smoke exhaust, Figure 3 The direction indicated by the arrow is the flow direction of the flue gas.

[0048] In this embodiment, the groove 2 is arranged at the end of the second section 12 away from the first section 11, which allows the flue gas to be smoothly discharged through the smoke outlet 3 without a large deflection when flowing along the second section 12 of the pipe, effectively reducing the smoke exhaust resistance of the smoke exhaust pipe 100 (see Figure 6 In this embodiment, the smoke exhaust pipe 100 further comprises a plug cover 13 for plugging the end of the second section 12 away from the first section 11. The plug cover 13 can prevent cold air from backflowing, and has a simple structure and good protection effect.

[0049] In this embodiment, the pipe body further comprises a foldable wrinkle section 14 connected between the first section 11 and the second section 12. The angle between the first section 11 and the second section 12 can be adjusted conveniently and quickly by folding the wrinkle section 14, which facilitates the installation of the gas water heater 200.

[0050] Embodiment 2

[0051] Embodiment 2 relates to a smoke exhaust system, which comprises the above-mentioned smoke exhaust pipe 100, and thus has the beneficial effects thereof, i.e. can overcome the defect that the smoke exhaust pipe 100' in the prior art is easily caused to shorten the service life of the water heater due to the backflow of rainwater.

[0052] Example 3

[0053] Example 3 relates to a gas water heater 200 comprising the above-mentioned flue pipe 100, thus having the beneficial effects thereof, i.e. being able to overcome the defect of the prior art flue pipe 100' which is easily shortened in the service life of the water heater due to rainwater backflow.

[0054] Obviously, the above examples are merely illustrative in nature and are not intended to limit the scope, applicability, or configuration of the embodiments in any way. Various changes could be made to the embodiments by those skilled in the art and without departing from the scope of the disclosure(s). Therefore, the description is not intended to be exhaustive or to limit the scope thereof to the explicit embodiments described. The scope of the disclosure(s) is intended to be, and includes, many alternatives, modifications, and equivalents.

Claims

1. A flue, characterised in that, The exhaust pipe (100) comprises: a pipe body having a first section (11) adapted to be connected to a main body (201) of a gas water heater (200) and a second section (12) connected to the first section (11), the first section (11) and the second section (12) being arranged at an angle with respect to each other, and the second section (12) having an inner pipe wall on at least a lower side thereof outwardly recessed to form a groove (2); an exhaust port (3) formed on a groove wall of the groove (2); the pipe wall of the second section (12) outwardly protruding to form a protruding portion, and the exhaust port (3) extending from a middle portion of the protruding portion towards a direction away from the first section (11).

2. A flue according to claim 1, characterised in that The groove (2) extends along a circumferential direction of the second section (12) and is annular, and the exhaust port (3) is uniformly distributed along the circumferential direction on the groove wall of the groove (2).

3. A flue according to claim 1 or 2, characterised in that, The groove wall of the groove (2) is arc-shaped in a longitudinal cross section.

4. A flue according to claim 1 or 2, wherein The groove (2) is formed at an end of the second section (12) away from the first section (11).

5. A flue according to claim 1 or 2, wherein An inner side of the protruding portion forms the groove (2).

6. A flue according to claim 5, wherein The exhaust port (3) is a strip-shaped hole extending along a length direction of the second section (12).

7. A flue according to claim 1 or 2, wherein The exhaust pipe (100) further comprises a plug cover (13) sealing an end of the second section (12) away from the first section (11).

8. A flue according to claim 1 or 2, wherein The pipe body further comprises a foldable wrinkle section (14) connected between the first section (11) and the second section (12).

9. A smoke evacuation system characterized by, The exhaust pipe (100) according to any one of claims 1-8.

10. A gas water heater, characterized by, The exhaust pipe (100) according to any one of claims 1-8.

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