CN221122262U - Smoke exhaust pipe structure and condensing gas water heater - Google Patents

Abstract

The utility model belongs to the technical field of gas water heaters, and discloses a smoke exhaust pipe structure and a condensing gas water heater. The smoke exhaust pipe structure comprises a smoke exhaust pipe, an adapter and a plurality of atomizing nozzles, wherein a plurality of smoke exhaust holes are formed in the side wall of the smoke exhaust pipe, the adapter is arranged in the smoke exhaust pipe, the adapter is provided with a water inlet connector and a plurality of nozzle connectors which are communicated with each other, the water inlet connector is used for introducing condensed water, each nozzle connector is connected with an atomizing nozzle, and each atomizing nozzle is inserted into one smoke exhaust hole. The utility model effectively coordinates and treats the problems of atomization quality and atomization efficiency of the condensed water, and the condensed water does not need to flow through the inside of the smoke exhaust pipe after atomization, and the problem that particles in the smoke meet the condensation of the atomized condensed water and are accumulated in the smoke exhaust pipe or the gas water heater is avoided, so that the smoke exhaust pipe is always and smoothly exhausted.

Description

Smoke exhaust pipe structure and condensing gas water heater

Technical Field

The utility model relates to the technical field of gas water heaters, in particular to a smoke exhaust pipe structure and a condensing gas water heater.

Background

The design of the condensing gas water heater accords with the trend of energy conservation and environmental protection, and is one of the most energy-saving and environmental-friendly products at present. The condensed water is generated when the condensing gas water heater operates, and the condensed water is required to be collected by arranging a condensed water collecting device and then discharged.

In the prior art, the condensed water of the condensing gas water heater is treated by arranging a condensed water collecting device in the condensing gas water heater, arranging an atomizing nozzle in a smoke exhaust pipe, pumping water in the condensed water collecting device to the atomizing nozzle by a water pump, and spraying the atomized condensed water along with flue gas to the atmosphere, thereby solving the problem of condensed water generated by a machine. In the process of atomizing condensed water, the aperture of an atomization nozzle has great influence on atomization quality, the aperture of the nozzle is large, the atomization flow is large, and fog beads tend to be in a water drop shape; the nozzle has small aperture, and although the atomization quality is good, the atomization speed is probably far lower than the condensate water generation speed. Therefore, the existing smoke exhaust pipe structure is difficult to coordinate the relationship between the condensate atomization quality and the atomization speed of the condensing gas water heater, and there is room for improvement.

Disclosure of utility model

One of the technical problems to be solved by the utility model is to provide a smoke exhaust pipe structure which can effectively coordinate and treat the problems of atomization quality and atomization efficiency of condensed water.

The second technical problem to be solved by the utility model is to provide a condensing gas water heater which can effectively coordinate and treat the problems of atomization quality and atomization efficiency of condensed water.

The first technical problem is solved by the following technical scheme:

a smoke evacuation tube structure comprising:

The side wall of the smoke exhaust pipe is provided with a plurality of smoke exhaust holes;

The adapter is arranged in the smoke exhaust pipe and is provided with a water inlet joint and a plurality of spray head joints which are communicated with each other, and the water inlet joint is used for introducing condensed water;

The atomizing nozzles are connected with the nozzle connectors, and the nozzle connectors are inserted into the smoke exhaust holes.

Compared with the background technology, the smoke exhaust pipe structure has the beneficial effects that:

The smoke exhaust pipe joint has compact and attractive structure by arranging the adapter in the smoke exhaust pipe; the adapter is provided with a water inlet connector and a plurality of nozzle connectors which are communicated with each other, each nozzle connector is connected with an atomization nozzle, and the atomization nozzles are inserted into the smoke exhaust holes to atomize condensed water and then directly spray out of the smoke exhaust holes along with smoke, so that liquid drops are prevented from being condensed in the smoke exhaust pipe; compared with the scheme that only one atomizing nozzle is arranged in the prior art, the utility model adopts a plurality of atomizing nozzles, so that the atomizing speed can be improved, and the nozzle aperture of the smaller atomizing nozzle can be set so as to have better atomizing quality, and the problems of effectively coordinating the atomizing quality and atomizing efficiency of the condensed water are solved; compared with the existing atomization mode of arranging the atomization nozzle or the atomization device in the smoke exhaust pipe, the atomization nozzle is inserted into the smoke exhaust hole, so that condensed water does not need to flow through the smoke exhaust pipe after atomization, and the problem that particles in smoke are accumulated in the smoke exhaust pipe or the gas water heater due to condensation of atomized condensed water is avoided, so that the smoke exhaust pipe is always and smoothly exhausted.

In one embodiment, the plurality of shower nozzles are arranged at intervals around the axis of the water inlet connector, a circumference Xiang Gajiao a is arranged between any two adjacent shower nozzles on the same circumferential surface, the plurality of smoke exhaust holes are arranged at intervals around the axis of the smoke exhaust pipe, a circumference Xiang Gajiao B is arranged between any two adjacent smoke exhaust holes on the same circumferential surface, a=kb, and K is a positive integer.

In one embodiment, the inner diameter of the spray head joint is smaller than the inner diameter of the water inlet joint.

In one embodiment, the nozzle adapter is provided with internal threads, the atomizer is provided with external threads, and the atomizer is threadably connected to the nozzle adapter.

In one embodiment, the smoke exhaust pipe structure further comprises a smoke pipe cover plate detachably mounted at the tail end of the smoke exhaust pipe, and the adapter of the smoke exhaust pipe structure is arranged on the smoke pipe cover plate.

In one embodiment, a first positioning portion is arranged on the end face, facing away from the water inlet joint, of the adapter, the first positioning portion is arranged around the axis of the adapter, a second positioning portion is arranged on the smoke tube cover plate, and the first positioning portion is in concave-convex fit with the second positioning portion to be positioned.

In one embodiment, the smoke tube cover plate is provided with a mounting flange, the mounting flange is provided with a plurality of third positioning parts which are distributed randomly, the circumference of the tail end of the smoke tube is provided with a plurality of fourth positioning parts, the mounting flange can be inserted into the tail end of the smoke tube, and the third positioning parts are matched with the fourth positioning parts in a concave-convex mode to be positioned.

In one embodiment, the outer wall of the tail end of the smoke exhaust pipe is provided with an annular concave shape, and the installation flanging can be stopped against the annular concave shape.

In one embodiment, the smoke pipe cover plate is provided with at least one exhaust hole.

The second technical problem is solved by the following technical scheme:

The condensing gas water heater comprises the smoke exhaust pipe structure, the water pipe and the water pump, wherein one end of the water pipe is connected with the water pump, the other end of the water pipe is connected with the water inlet joint of the adapter, and the water pump is used for conveying condensed water to the atomizing nozzle.

Compared with the background technology, the condensing gas water heater has the following beneficial effects:

According to the condensing gas water heater, the adapter is arranged in the smoke exhaust pipe, the plurality of atomizing nozzles arranged on the adapter are inserted into the smoke exhaust holes of the smoke exhaust pipe, so that the smoke exhaust pipe is compact in structure, the nozzle joint of the smoke exhaust pipe is arranged opposite to the smoke exhaust holes, atomized fog can be discharged along with the smoke exhaust holes and blown into the atmosphere, the speed of the fog drifting into the air is effectively increased, the fog is prevented from gathering and condensing into water drops in the smoke exhaust pipe, and the smoke exhaust pipe is smooth in exhaust all the time; be equipped with a plurality of atomizer on the adaptor, do benefit to the atomizer through less aperture and improve the atomizing quality, a plurality of atomizer do benefit to and improve atomization efficiency, and then effectively coordinate the atomizing quality and the atomization efficiency of comdenstion water.

Drawings

FIG. 1 is a schematic diagram of a condensing gas water heater according to an embodiment of the present utility model;

Fig. 2 is an exploded view of a smoke exhaust pipe according to an embodiment of the present utility model;

Fig. 3 is a schematic structural view of an adaptor in a smoke exhaust pipe structure according to an embodiment of the present utility model;

fig. 4 is a cross-sectional view of an adapter in a smoke exhaust pipe structure according to an embodiment of the present utility model;

Fig. 5 is a front view of a smoke exhaust pipe structure according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of C-C of FIG. 5;

FIG. 7 is an enlarged schematic view of the area D in FIG. 5;

Fig. 8 is a schematic structural view of a smoke tube cover plate of a smoke tube structure according to an embodiment of the present utility model.

Description of the reference numerals:

100. A smoke exhaust pipe; 101. a smoke vent; 102. a fourth positioning portion; 103. annular concave shape; 200. a condensed water collecting device; 201. a water pipe; 202. a water pump; 300. a neutralizer;

1. An adapter; 11. a water inlet joint; 111. a condensed water inlet; 12. a spray head joint; 13. a first positioning portion; 2. an atomizing nozzle; 3. a smoke tube cover plate; 31. a second positioning portion; 32. installing a flanging; 33. a third positioning portion; 34. and an exhaust hole.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The utility model provides a smoke exhaust pipe structure for effectively coordinating and treating the problems of atomization quality and atomization efficiency of condensed water in a condensing type gas water heater. As shown in fig. 1, the conventional condensing gas water heater includes a smoke exhaust pipe 100, a condensed water collecting device 200, and a neutralizer 300 (or condenser), condensed water condensed on the neutralizer 300 (or condenser) is collected in the condensed water collecting device 200, a water pipe 201 is connected to the condensed water collecting device 200, a water pump 202 is provided on the water pipe 201, the water pump 202 can introduce condensed water into the smoke exhaust pipe structure, and the condensed water is atomized and discharged in the smoke exhaust pipe structure.

As shown in fig. 2 to 8, the smoke exhaust pipe structure provided by the embodiment of the utility model comprises a smoke exhaust pipe 100, an adapter 1 and an atomization nozzle 2, wherein a plurality of smoke exhaust holes 101 are formed in the side wall of the smoke exhaust pipe 100; the adaptor 1 is located in the smoke exhaust pipe 100, the adaptor 1 is provided with a water inlet joint 11 and a plurality of nozzle joints 12 which are communicated with each other, the water inlet joint 11 is used for introducing condensed water, each nozzle joint 12 is connected with an atomizing nozzle 2, and each atomizing nozzle 2 is inserted into one smoke exhaust hole 101.

Specifically, the condensed water in the condensed water collecting device 200 is supplied to the atomizing head 2 through the water pipe 201 and the water pump 202, and the atomizing head 2 can atomize the condensed water and discharge the atomized condensed water from the smoke hole 101.

As shown in fig. 3 and 4, the adaptor 1 has a water inlet joint 11 and three nozzle joints 12, the water inlet joint 11 is coaxially disposed with the adaptor 1, the adaptor 1 is coaxially disposed with the smoke exhaust pipe 100, the three nozzle joints 12 are circumferentially spaced along the adaptor 1, the water inlet joint 11 is provided with a condensed water inlet 111, one end of the nozzle joint 12 facing away from the water inlet joint 11 is a condensed water outlet, the condensed water inlet 111 is connected with a water pipe 201 to introduce condensed water in the condensed water collecting device 200, and an atomization nozzle 2 is mounted at the tail end of each nozzle joint 12, namely, at the condensed water outlet, to perform atomization treatment on the condensed water. In the smoke exhaust pipe structure, the adapter 1 is positioned in the smoke exhaust pipe 100, so that the structure is compact; each nozzle joint 12 on the adapter 1 is provided with an atomizing nozzle 2, and the atomizing nozzle 2 is inserted into the smoke exhaust hole 101; the plurality of atomizing nozzles 2 are respectively arranged at the plurality of nozzle joints 12, and the atomizing nozzles 2 can atomize condensed water and spray the condensed water out of the smoke exhaust holes 101 along with flue gas so as to avoid condensation of liquid drops; compared with the scheme that only one atomizing nozzle 2 is arranged in the prior art, the utility model adopts a plurality of atomizing nozzles 2, so that the atomizing speed can be improved, and the smaller nozzle aperture can be arranged to have better atomizing quality, so that the problems of effectively coordinating the atomizing quality and the atomizing efficiency of the condensate water are solved. Compared with the existing atomization mode of arranging the atomization nozzle 2 or the atomization device in the smoke exhaust pipe 100, the atomization nozzle 2 is inserted into the smoke exhaust hole 101, so that atomized condensed water does not need to flow through the smoke exhaust pipe 100, the problem that particles in smoke are accumulated in the smoke exhaust pipe 100 or the gas water heater due to condensation of the atomized condensed water is avoided, and the smoke exhaust pipe 100 is always exhausted smoothly.

In one embodiment, the plurality of shower nozzles 12 are arranged at intervals around the axis of the water inlet joint 11, a circumference Xiang Gajiao a is arranged between any two adjacent shower nozzles 12 on the same circumferential surface, the plurality of smoke exhaust holes 101 are arranged at intervals around the axis of the smoke exhaust pipe 100, a circumference Xiang Gajiao B is arranged between any two adjacent smoke exhaust holes 101 on the same circumferential surface, a=kb, and K is a positive integer.

As shown in fig. 5 and 6, the circumferential included angle a of the nozzle joint 12 is an integer multiple of the circumferential included angle B of the smoke exhaust hole 101, so that the nozzle joint 12 and the atomizing nozzle 2 mounted thereon can be arranged opposite to the smoke exhaust hole 101, the mist generated after atomization of the condensed water can be directly exhausted through the smoke exhaust hole 101, and the smoke has driving and carrying effects on the mist, thereby being beneficial to exhausting the mist along with the smoke and reducing or avoiding condensation of the mist in the smoke exhaust pipe 100. In this embodiment, three atomizer heads 2 are uniformly arranged around the circumference of the adapter 1 at intervals, the atomizer heads 2 are opposite to the smoke exhaust holes 101, and the sprayed mist is directly discharged out of the smoke exhaust holes 101.

In one embodiment, the inner diameter of the spray head joint 12 is smaller than the inner diameter of the water inlet joint 11. The advantage of this is that a plurality of spray heads 12 can be provided on the adapter 1 for mounting a plurality of atomizer heads 2, the atomizer heads 2 being able to employ smaller atomizing apertures for better atomization; the condensed water provided by the water inlet joint 11 is atomized by the plurality of atomizing nozzles 2 simultaneously, so that the atomization speed is high and the efficiency is high.

In one embodiment, the maximum outer diameter of the showerhead adapter 12 is less than the diameter of the smoke vent 101.

As shown in fig. 5 and 6, the maximum outer diameter of the nozzle joint 12 is smaller than the diameter of the smoke exhaust hole 101, the nozzle 2 can be just opposite to the axis of the smoke exhaust hole 101 when installed, the smoke can be exhausted through the annular gap between the nozzle 2 and the wall of the smoke exhaust hole 101, the smoke can blow the mist into the atmosphere, the speed of the mist drifting into the air is increased, and the condensation of the mist on the smoke exhaust pipe 100 is effectively avoided.

In one embodiment, the spray head joint 12 is provided with an internal thread, the atomizer head 2 is provided with an external thread, and the atomizer head 2 is screwed to the spray head joint 12.

As shown in fig. 3 and 4, the nozzle joint 12 is convexly arranged on the surface of the body of the adapter 1, the inner wall of the nozzle joint 12 is provided with an internal thread, and the internal thread is matched with an external thread of the connection end of the atomizer nozzle 2 for processing, so that the atomizer nozzle 2 can be connected with the nozzle joint 12 in a threaded manner, the installation is convenient, and the screwing depth of the atomizer nozzle 2 is convenient to adjust, so that the penetrating depth between the atomizer nozzle 2 and the smoke exhaust hole 101 is convenient to adjust.

In one embodiment, the condensing gas water heater further comprises a smoke tube cover plate 3, the smoke tube cover plate 3 is detachably mounted at the tail end of the smoke exhaust tube 100, and the adapter 1 is arranged on the smoke tube cover plate 3.

As shown in fig. 2 and 8, the smoke pipe cover 3 is installed at the end of the smoke pipe 100 and closes the end so that smoke in the smoke pipe 100 can be discharged only through the smoke discharge hole 101. The circumference interval of the pipe wall at the tail end of the smoke exhaust pipe 100 is provided with a plurality of circles of smoke exhaust holes 101, each circle comprises a plurality of smoke exhaust holes 101 which are arranged at intervals, a circumference included angle B (namely a central angle) between any two adjacent smoke exhaust holes 101 in each circle of smoke exhaust holes 100 is correspondingly provided with a plurality of spray joints 12 on the adapter 1 at intervals and uniformly arranged around the axis of the water inlet joint 11, the circumference included angle A between two adjacent spray joints 12 is an integral multiple of the circumference included angle B, the spray joints 12 can be just opposite to one smoke exhaust hole 101, and mist is convenient to exhaust along with the smoke. In some embodiments, the front end of the adapter 1 facing away from the condensate inlet 111 is bolted to the smoke tube cover 3.

In one embodiment, a first positioning portion 13 is disposed on an end surface of the adapter 1 facing away from the water inlet joint 11, the first positioning portion 13 is disposed around an axis of the adapter 1, a second positioning portion 31 is disposed on the smoke tube cover plate 3, and the first positioning portion 13 is in concave-convex fit with the second positioning portion 31 to be positioned.

In order to make the atomizer head 2 face the smoke discharge hole 101 when being installed, circumferential positioning is required when the adapter 1 is fixedly connected with the smoke pipe cover plate 3. As shown in fig. 3 and 8, in this embodiment, the second positioning portion 31 is disposed on the smoke tube cover plate 3, the first positioning portion 13 is disposed on the front end surface of the adapter 1, the first positioning portion 13 is disposed around the axis of the adapter 1, and positioning and mounting of the adapter 1 are implemented by one-to-one concave-convex matching between the plurality of first positioning portions 13 and the plurality of second positioning portions 31. Wherein the first positioning portion 13 is a plurality of protrusions, and the second positioning portion 31 is a plurality of pits corresponding to the protrusions; or the first positioning portion 13 is a plurality of pits, and the second positioning portion 31 is a protrusion that mates with the plurality of pits.

In one embodiment, the smoke tube cover plate 3 is provided with a mounting flange 32, the mounting flange 32 is provided with a third positioning portion 33, the circumference of the tail end of the smoke tube 100 is provided with a fourth positioning portion 102, the mounting flange 32 can be inserted into the tail end of the smoke tube 100, and the third positioning portion 33 is in concave-convex fit with the fourth positioning portion 102 for positioning.

As shown in fig. 7 and 8, one of the third positioning portion 33 and the fourth positioning portion 102 is a pit, and the other is a protrusion, and the protrusion and the recess cooperate to realize circumferential positioning of the smoke tube cover plate 3 and the smoke tube 100. The third positioning portions 33 are circumferentially spaced along the mounting flange 32, and the fourth positioning portions 102 are circumferentially spaced along the smoke exhaust pipe 100. The third positioning portions 33 are irregularly arranged, so that the smoke tube cover plate 3 and the smoke tube 100 can be positioned accurately in the circumferential direction during installation. Wherein, the external diameter of the installing flange 32 is slightly smaller than the internal diameter of the smoke exhaust pipe 100, and the installing flange 32 can be inserted into the smoke exhaust pipe 100 for installation.

In one embodiment, the outer wall of the end of the smoke evacuation tube 100 is provided with an annular recess 103, and the mounting flange 32 can abut against the annular recess 103.

As shown in fig. 7 and 8, the distance between the annular concave 103 and the end of the smoke exhaust pipe 100 is equal to the width of the installation flange 32, the annular concave 103 is concave inward from the outer wall of the smoke exhaust pipe 100, an annular protrusion is formed on the inner wall of the smoke exhaust pipe 100, and when the installation flange 32 is inserted into the smoke exhaust pipe 100, the end of the installation flange 32 just can abut against the annular protrusion on the inner wall of the annular concave 103, so as to limit the insertion depth of the installation flange 32.

In one embodiment, the smoke tube cover plate 3 is provided with at least one exhaust hole 34.

As shown in fig. 8, the smoke pipe cover plate 3 is provided with the exhaust hole 34 around the axis, so that the smoke can be directly exhausted through the exhaust hole 34, and the exhaust requirement under the condition of large smoke exhaust amount is met.

The embodiment of the utility model also provides a condensing gas water heater, as shown in fig. 1, which comprises a smoke exhaust pipe structure, a water pipe 201 and a water pump 202, wherein one end of the water pipe 201 is connected with the water pump 202, the other end of the water pipe is connected with the water inlet joint 11 of the adapter 1, and the water pump 202 is used for conveying condensed water to the atomizing nozzle 2.

The condensation type gas water heater comprises a smoke exhaust pipe structure, wherein in the smoke exhaust pipe structure, an adapter 1 is arranged in a smoke exhaust pipe 100, an atomization spray head 2 is inserted in a smoke exhaust hole 101, condensed water on an intercooler 300 or a condenser is collected in a condensed water collecting device 200, the condensed water collecting device 200 is connected with a condensed water inlet 111 of the adapter 1 through a water pipe 201, the condensed water is pumped into the adapter 1 through a water pump 202 arranged on the water pipe 201 and respectively flows to a plurality of spray head joints 12 through water inlet joints 11, the spray head joints 12 are provided with the atomization spray head 2, the atomization spray head 2 is inserted in the smoke exhaust hole 101, atomized fog can be blown into the atmosphere along with the smoke exhausted by the smoke exhaust hole 101, the speed of the fog drifting into the air is effectively accelerated, and the fog is prevented from being gathered and condensed into water drops in the smoke exhaust pipe 100; be equipped with a plurality of atomizer 2 on the adaptor 1, do benefit to the atomizer 2 through less aperture and improve the atomizing quality, a plurality of atomizer 2 do benefit to and improve atomization efficiency, and then effectively coordinate the atomizing quality and the atomizing efficiency of comdenstion water.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing detailed description of the embodiments presents only a few embodiments of the present utility model, which are described in some detail and are not intended to limit the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. Smoke exhaust pipe structure, its characterized in that includes:

a smoke exhaust pipe (100), wherein a plurality of smoke exhaust holes (101) are formed in the side wall of the smoke exhaust pipe (100);

The adapter (1) is arranged in the smoke exhaust pipe (100), the adapter (1) is provided with a water inlet joint (11) and a plurality of spray head joints (12) which are communicated with each other, and the water inlet joint (11) is used for introducing condensed water;

The atomizing nozzles (2), each nozzle joint (12) is connected with the atomizing nozzle (2), and each atomizing nozzle (2) is inserted into one smoke exhaust hole (101).

2. The smoke exhaust pipe structure according to claim 1, wherein a plurality of the nozzle connectors (12) are arranged at intervals around the axis of the water inlet connector (11), a circumference Xiang Gajiao a is arranged between any two adjacent nozzle connectors (12) on the same circumferential surface, a plurality of the smoke exhaust holes (101) are arranged at intervals around the axis of the smoke exhaust pipe (100), a circumference Xiang Gajiao B is arranged between any two adjacent smoke exhaust holes (101) on the same circumferential surface, and a=kb, K is a positive integer.

3. The smoke evacuation tube structure according to claim 2, wherein said nozzle joint (12) has an inner diameter smaller than the inner diameter of said water inlet joint (11).

4. A smoke evacuation tube structure according to claim 3, characterised in that said nozzle head (12) is provided with an internal thread, said atomizer head (2) is provided with an external thread, said atomizer head (2) being screwed to said nozzle head (12).

5. The smoke evacuation tube structure according to any one of claims 1-4, further comprising a smoke tube cover plate (3), said smoke tube cover plate (3) being detachably mounted at the end of said smoke evacuation tube (100), said adapter (1) being arranged on said smoke tube cover plate (3).

6. The smoke exhaust pipe structure according to claim 5, wherein a first positioning portion (13) is arranged on an end face, facing away from the water inlet joint (11), of the adapter (1), the first positioning portion (13) is arranged around an axis of the adapter (1), a second positioning portion (31) is arranged on the smoke pipe cover plate (3), and the first positioning portion (13) is in concave-convex fit with the second positioning portion (31) to be positioned.

7. The smoke exhaust pipe structure according to claim 6, wherein the smoke pipe cover plate (3) is provided with a mounting flange (32), the mounting flange (32) is provided with a third positioning portion (33), the circumference of the tail end of the smoke exhaust pipe (100) is provided with a fourth positioning portion (102), the mounting flange (32) can be inserted into the tail end of the smoke exhaust pipe (100), and the third positioning portion (33) is in concave-convex fit with the fourth positioning portion (102) for positioning.

8. The smoke exhaust pipe structure according to claim 7, wherein the outer wall of the end of the smoke exhaust pipe (100) is provided with an annular concave shape (103), and the mounting flange (32) can be stopped against the annular concave shape (103).

9. The smoke evacuation tube structure according to claim 5, wherein said smoke tube cover plate (3) is provided with at least one exhaust hole (34).

10. The condensing gas water heater is characterized by comprising a water pipe (201), a water pump (202) and the smoke exhaust pipe structure according to any one of claims 1-9, wherein one end of the water pipe (201) is connected with the water pump (202), the other end of the water pipe (201) is connected with a water inlet joint (11) of the adapter (1), and the water pump (202) is used for conveying condensed water to the atomizing nozzle (2).