CN213713562U

CN213713562U - Air exhaust structure and gas water heater using same

Info

Publication number: CN213713562U
Application number: CN202022254843.8U
Authority: CN
Inventors: 李志敏; 吴桂安; 陈俊; 邓飞忠; 仇明贵; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-07-16
Anticipated expiration: 2030-10-12

Abstract

The utility model discloses an air exhaust structure and a gas water heater using the same, wherein the air exhaust structure is used for the gas water heater and comprises a smoke collecting hood, a volute, a wind wheel, a motor and a smoke exhaust port; the smoke collecting hood is of a streamline structure and comprises an inlet and an outlet, the outlet is of a porous net structure, the inlet is connected with a heat exchange assembly of the gas water heater, an air inlet and an outlet of the volute are connected, a smoke exhaust port is communicated with the volute, the wind wheel is arranged in the volute, the motor is connected with the wind wheel through a rotating shaft, and the motor is arranged on the volute through a connecting support. The utility model has the advantages that the smoke collecting hood is arranged into a streamline structure, the flow channel is reasonable, and the airflow noise is effectively reduced; and set up to porous network structure through the export with the collection petticoat pipe, can effectively reduce the vortex that the air current produced when passing through to carry out the rectification to the turbulent flue gas that gets into the collection petticoat pipe, effectively reduce the impulsive noise to the wind wheel, further reduce because the vibration noise that unstable air current causes, noise reduction effect is good, has promoted user's use and has experienced.

Description

Air exhaust structure and gas water heater using same

Technical Field

The utility model belongs to the technical field of exhaust structure, concretely relates to exhaust structure and use its gas heater.

Background

The fan is one of the key parts of the air exhaust structure in the gas water heater and the gas heating furnace, and mainly provides air required by a combustion system.

In the prior art, the blower flow channel and outlet structure of the exhaust device are not reasonably designed, so that the exhaust device generates severe airflow turbulence noise under the condition of high wind speed, which is mainly reflected as vortex noise, airflow interference turbulence noise caused by non-uniform speed, vibration noise generated when airflow resistance is increased, and the like, and the noise occupies a large part of proportion in the noise of the whole machine, so that the use experience of a user is influenced, and the user has higher and higher appeal for low noise.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides an exhaust structure is streamlined structure's collection petticoat pipe through setting up the runner, and the export of collection petticoat pipe sets up to porous network structure, has effectively solved the great problem of the unreasonable noise that leads to of current exhaust device runner.

Another object of the utility model is to provide a gas heater who uses above-mentioned air exhausting structure.

The utility model adopts the technical proposal that:

an air exhaust structure for a gas water heater comprises a fume collecting hood, a volute, a wind wheel, a motor and a smoke exhaust port;

the exhaust fume collecting hood comprises an inlet and an outlet, and the outlet is of a porous net structure and is used for reducing vortex when airflow passes through and improving airflow uniformity;

the inlet is connected with a heat exchange assembly of the gas water heater, the air inlet of the volute is connected with the outlet, the smoke outlet is communicated with the volute, the wind wheel is arranged in the volute, and the motor is fixed on the volute through a support and used for driving the wind wheel to rotate.

Preferably, the collection petticoat pipe is streamlined structure, the collection petticoat pipe includes that from the bottom up connects gradually advances cigarette portion, water conservancy diversion portion and the portion of discharging fume, advance the linear type cover body that cigarette portion is corresponding with gas heater's outlet flue, the import set up in advance cigarette portion department, water conservancy diversion portion to the portion slope of discharging fume, water conservancy diversion portion with form the contained angle between the outer wall of advancing cigarette portion, and contained angle between them is the obtuse angle, the export set up in the portion department of discharging fume, the export direction with the import direction is perpendicular.

Preferably, the outlet is a circular through hole capable of being matched with the volute air inlet, a porous screen plate is arranged on the outlet, holes in the porous screen plate are circular holes, and the sum of the areas of the circular holes in the porous screen plate is equal to the area of the outlet.

Preferably, the diameter of the round hole is 2-10 mm.

Preferably, the diameter of the circular hole is 3 mm.

Preferably, the wind wheel is of a plug-in sheet type structure, and the blades of the wind wheel are of an arc-shaped structure in smooth transition and smooth in surface, so that the friction resistance between the airflow and the blades is reduced; the blade is made of an aluminum alloy material.

Preferably, the volute comprises a left volute and a right volute which can be buckled with each other, and the section line of the volute adopts an Archimedes spiral line.

Preferably, a blocking piece for preventing downdraft is arranged in the smoke outlet.

Preferably, the heat dissipation device further comprises a heat dissipation assembly, wherein the heat dissipation assembly is arranged between the volute and the motor and used for enhancing air flow between the motor and the volute so as to form convective heat exchange.

Preferably, the heat dissipation assembly comprises a heat dissipation wind wheel and a plurality of heat dissipation blades arranged on the heat dissipation wind wheel, and the heat dissipation wind wheel, the wind wheel and the motor are coaxially arranged.

Preferably, the smoke collecting hood and the volute are both made of electrolyte plates, and the smoke exhaust port is made of stainless steel.

The utility model discloses still protect a gas heater, this gas heater includes above-mentioned exhaust structure.

The utility model has the advantages that: the utility model has the advantages that the smoke collecting hood, the volute, the wind wheel, the motor and the smoke outlet are arranged, smoke enters the smoke collecting hood through the inlet of the smoke collecting hood and flows into the volute from the outlet, the motor drives the wind wheel to discharge the smoke in the smoke collecting hood to the smoke outlet and then to the outside, and the structure is simple; meanwhile, the smoke collecting hood is arranged into a streamline structure, so that the flow channel is reasonable, and the airflow noise is effectively reduced; and set up to porous network structure through the export with the collection petticoat pipe, can effectively reduce the vortex that the air current produced when passing through, improve the homogeneity of air current simultaneously, carry out the rectification through porous structure to the turbulent flue gas that gets into the collection petticoat pipe promptly, make the air current speed that gets into in the spiral case even, effectively reduce the impulsive noise to the wind wheel, further reduce because the vibration noise that unstable air current caused, noise reduction effect is good, has promoted user's use and has experienced.

Drawings

Fig. 1 is a structural diagram of an air exhaust structure provided in embodiment 1 of the present invention;

fig. 2 is a structural diagram of a smoke collecting hood in an exhaust structure provided in embodiment 1 of the present invention;

fig. 3 is a right side view of a smoke collecting hood in an exhaust structure provided in embodiment 1 of the present invention;

fig. 4 is a schematic view of a flow direction of an air duct in a smoke collecting hood in an air exhausting structure provided in embodiment 1 of the present invention;

fig. 5 is a structural diagram of a volute in an exhaust structure provided in embodiment 1 of the present invention;

fig. 6 is a right side view of a volute in an exhaust structure provided in embodiment 1 of the present invention;

fig. 7 is a front view of a volute in an exhaust structure provided in embodiment 1 of the present invention;

fig. 8 is a structural diagram of a smoke exhaust port in an exhaust structure provided in embodiment 1 of the present invention;

fig. 9 is a front view of a smoke exhaust port in an exhaust structure provided in embodiment 1 of the present invention;

fig. 10 is a bottom view of a smoke outlet in an exhaust structure provided in embodiment 1 of the present invention;

fig. 11 is an assembly view of a wind wheel, a motor and a heat dissipation assembly in an exhaust structure provided in embodiment 1 of the present invention;

fig. 12 is a right side view of the exhaust structure provided by embodiment 1 of the present invention after the wind wheel, the motor and the heat dissipation assembly are assembled;

fig. 13 is a front view of the exhaust structure provided by embodiment 1 of the present invention after the wind wheel, the motor and the heat dissipation assembly are assembled;

fig. 14 is a left side view of the exhaust structure provided by embodiment 1 of the present invention after the wind wheel, the motor and the heat dissipation assembly are assembled.

In the figure: 1. a smoke collecting hood; 11. an inlet; 12. an outlet; 13. a smoke inlet part; 14. a flow guide part; 15. a smoke exhaust part; 2. a volute; 21. a left volute; 22. a right volute; 3. a wind wheel; 4. a motor; 5. a smoke outlet; 6. a heat dissipating component; 61. and a heat dissipating blade.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention; that is, the specific embodiments herein are a subset of the embodiments in the present application and not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

Example 1

The embodiment 1 of the utility model provides an exhaust structure, which is used for a gas water heater and comprises a smoke collecting hood 1, a volute 2, a wind wheel 3, a motor 4 and a smoke exhaust port 5 as shown in figures 1-14;

the fume collecting hood 1 comprises an inlet 11 and an outlet 12, wherein the outlet 12 is of a porous net structure and is used for reducing vortex when airflow passes through and improving airflow uniformity;

import 11 is connected with gas heater's heat exchange assembly, the air inlet of spiral case 2 with export 12 is connected, exhaust port 5 with spiral case 2 intercommunication sets up, wind wheel 3 set up in the spiral case 2, motor 4 passes through the support fixed set up on spiral case 2 for drive wind wheel 3 rotates.

Specifically, the exhaust fume collecting hood 1 includes import 11 and export 12, import 11 sets up in the bottom of exhaust fume collecting hood 1, export 12 sets up in one side of exhaust fume collecting hood 1, import 11 is connected with gas heater's heat exchange assembly, export 12 department is provided with spiral case 2, and export 12 and spiral case 2's air inlet intercommunication, wind wheel 3 sets up in spiral case 2, wind wheel 3 is through the output shaft of pivot with motor 4, with this realize motor 4 to the drive of wind wheel 3, be provided with the support that is used for fixed motor 4 on the spiral case 2, motor 4 passes through the support and is connected with the spiral case.

Therefore, the flue gas enters the smoke collecting hood 1 and then enters the volute 2 from the outlet 12, the motor 4 drives the wind wheel 3 to rotate, and the flue gas in the smoke collecting hood 1 is discharged to the smoke outlet 5 and is discharged outside;

in specific implementation, the flow channel in the smoke collecting hood 1 is a streamline flow channel, and the flow channel of the smoke collecting hood 1 is set to be of a streamline structure, so that the flow channel is reasonable, and airflow noise is effectively reduced; and set up to porous network structure through the export 12 with collection petticoat pipe 1, can effectively reduce the vortex that the air current produced when passing through, improve the homogeneity of air current simultaneously, be about to get into the disordered flue gas of collection petticoat pipe 1 and carry out the rectification through porous structure, make the air current speed that gets into in the spiral case 2 even, effectively reduce the impulsive noise to wind wheel 3, further reduce because the vibrational noise that unstable air current causes, the noise reduction effect is good, has promoted user's use and has experienced.

The streamline structure is the existing structure, namely an external shape of an object, which is represented by a smooth and regular surface without large fluctuation and sharp edges and corners, because the smoke collecting hood 1 adopts the streamline structure, smoke smoothly passes through the arc turning part at the upper part of the smoke collecting hood 1 and enters the volute 2, and is discharged outdoors by the air exhaust structure.

As shown in fig. 1, 2 and 4, the fume collecting hood 1 is of a streamline structure and is made of an electrolytic plate material;

specifically, as shown in fig. 4, the collection petticoat pipe 1 is streamlined structure, collection petticoat pipe 1 includes that from the bottom up connects gradually advances cigarette portion 13, water conservancy diversion portion 14 and the portion 15 of discharging fume, advance the linear type cover that cigarette portion 13 corresponds for the outlet flue with gas heater, import 11 sets up in advancing cigarette portion 13 department, water conservancy diversion portion 14 to 15 slopes of discharging fume, water conservancy diversion portion 14 with form the contained angle between the outer wall of advancing cigarette portion 13, and contained angle between them is the obtuse angle, export 12 set up in 15 departments of discharging fume, export 12 the direction with the direction of import 11 is perpendicular.

That is, the smoke inlet portion 13 is provided with the flow guiding portion 14, the flow guiding portion 14 is inclined towards the smoke exhaust portion, and the smoke inlet portion and the smoke exhaust portion are connected, an included angle is formed between the outer wall of the smoke inlet portion 13 and the outer wall of the flow guiding portion 14, and the included angle is an obtuse angle.

In specific implementation, the connection between the guide plate and the outlet 12 on the smoke collecting hood 1 below the volute 2 can be in an arc-line structure or in a straight-line structure.

In specific implementation, the smoke collecting cover 1 can comprise a front plate, a rear plate and two side plates, namely the smoke collecting cover is formed by enclosing the front plate, the rear plate and the two side plates, and the smoke collecting cover 1 can be spliced or buckled or riveted into a whole through butt welding;

meanwhile, in order to improve the overall rigidity of the fume collecting hood 1 and ensure the service life of the fume collecting hood 1, the overall rigidity is improved through surface profiling.

In the concrete implementation, spiral case 2 is connected through lock joint and screw sealing connection's mode with collection petticoat pipe 1, and spiral case 2 welds with exhaust port 5, and motor 4 passes through the support and 2 riveting fixed of spiral case, but above-mentioned connected mode is not fixed, can select other connected modes to connect above-mentioned part according to in-service use or processing needs.

In a specific implementation, in order to reduce resistance to airflow, smooth arc transition is adopted at the connecting positions of the smoke inlet portion 13, the flow guide portion 14 and the smoke exhaust portion 15.

As shown in fig. 2 and fig. 3, the outlet 12 of the smoke collecting hood 1 is a circular through hole which can be matched with the air inlet of the volute 2, and the circular through hole is provided with a porous net plate, and the holes on the porous net plate are circular holes, so that the porous net structure can effectively reduce the vortex generated when the air flow passes through and improve the uniformity of the air flow; the turbulent flue gas entering the smoke collecting cover 1 is rectified by the porous net structure through the porous structure, so that the air flow speed entering the volute 2 is uniform, the impact noise to the impeller blades is reduced, and the vibration noise caused by unstable air flow can be further reduced.

In order to realize better discharge of smoke, the outlet 12 is a circular through hole which can be matched with the air inlet of the volute 2, the outlet 12 is provided with a porous screen plate, holes on the porous screen plate are circular holes, and the sum of the areas of the circular holes on the porous screen plate is equal to the area of the outlet 12.

In one embodiment, the porous mesh structure is defined by a number of circular holes, i.e., the area of the circular holes and the equivalent area of the outlet 12.

Wherein the diameter of the round hole is 2-10 mm;

preferably, the diameter of the circular hole is 3 mm.

As shown in fig. 11-14, the wind wheel 3 has a blade-inserting structure, and the blades of the wind wheel 3 have a smooth arc-shaped structure and a smooth surface, so as to reduce the frictional resistance between the airflow and the blades; the blade is made of aluminum alloy.

Specifically, the blades of the wind wheel 3 are uniformly and neatly distributed between two wheel plates of the impeller, the two ends of each blade are spliced with the wheel plates, the surfaces of the blades are smooth, the resistance coefficient is low, and the friction resistance between airflow and the blades is small; the smooth surface of the blade has two layers, namely the blade is of a smooth arc structure and can enable airflow to be in smooth transition, and the surface of the blade is smooth, namely the friction coefficient is small, so that the friction resistance between the airflow and the blade is reduced; meanwhile, the blades are made of aluminum alloy materials;

therefore, the blade is made of the aluminum alloy, the surface and the structure of the blade are smooth, the boundary layer on the surface of the blade can be thin, the problem that the air exhaust amount is reduced due to the thickness of the boundary layer is not easy to generate, the efficiency of the fan is effectively improved, and meanwhile, the noise generated by the separation of the boundary layer is reduced.

In particular, the formation of the boundary layer is mainly due to the contact of the fluid and the solid, for example, the contact of the air and the blade, and the velocity gradient between the air and the blade at the near wall surface and the far wall surface occurs due to the viscous shear force in the air, and the near wall velocity is low. The fluid with a certain speed and the flowing solid can have the problem of thickness, the smoother the surface and the thinner the surface, the smaller the vortex quantity generated during separation and the lower the noise;

in the embodiment, the structure, the material and the like of the blade are limited, so that the surface boundary layer of the blade can be thin, the efficiency of the fan is improved, and the noise generated by boundary layer separation is reduced.

In a specific implementation, the blade can also be made of stainless steel.

As shown in fig. 5-7, the volute casing 2 includes a left volute casing 21 and a right volute casing 22 that can be fastened to each other, and the cross-sectional line of the volute casing 2 is an archimedes spiral line.

Thus, the flow channel of the volute 2 conforms to the Archimedes spiral line type, the flow channel has small flow resistance, smooth air exhaust and low noise;

in a specific implementation, the volute casing 2 is made of electrolyte.

As shown in fig. 8-10, a blocking piece for preventing the backflow is arranged in the smoke outlet 5.

Specifically, the smoke outlet 5 is made of stainless steel and is internally provided with an anti-downdraft baffle plate; inside can effectively prevent that external cold air from flowing backward into the machine in winter in the north, avoid inside temperature to hang down the water route part and other spare parts by freezing excessively.

As shown in fig. 11 and 13, the air exhaust structure further includes a heat dissipation assembly 6, where the heat dissipation assembly 6 is disposed between the volute 2 and the motor 4, and is used for enhancing air flow between the motor 4 and the volute 2 to form convective heat transfer.

The heat dissipation assembly 6 comprises a heat dissipation wind wheel and a plurality of heat dissipation blades 61 arranged on the heat dissipation wind wheel, and the heat dissipation wind wheel is coaxial with the wind wheel 3 and the motor 4.

Specifically, the heat dissipation wind wheel is located between the volute 2 and the motor 4, the heat dissipation wind wheel is coaxially arranged with the wind wheel 3 and the output shaft of the motor 4, and the heat dissipation blades 61 are uniformly arranged on the heat dissipation wind wheel, so that the wheel-shaped blades mainly enhance air disturbance between the motor 4 and the volute 2, accelerate air circulation, form continuous convection heat exchange during operation, reduce the surface temperature rise of the motor 4 and the volute 2, and prolong the service life of the heat dissipation wind wheel.

The working principle is as follows: when the exhaust structure of the embodiment is used, smoke enters the smoke collecting hood 1, then reaches the outlet 12, passes through the porous net structure of the outlet 12, effectively reduces vortex generated when air flow passes through, rectifies turbulent air flow, enables the air flow entering the volute 2 to have uniform speed, and reduces impact noise on impeller blades; then enters the volute 2 from the outlet 12, the motor 4 drives the wind wheel 3 to rotate, and the smoke in the smoke collecting hood 1 is discharged to the smoke outlet 5 and is discharged outside.

In the embodiment, the smoke collecting hood, the volute, the wind wheel, the motor and the smoke outlet are arranged, smoke enters the smoke collecting hood through the inlet of the smoke collecting hood and flows into the volute from the outlet, the motor drives the wind wheel to discharge the smoke in the smoke collecting hood to the smoke outlet and then to the outside, and the structure is simple; meanwhile, the fume collecting hood is of a streamline structure, so that the flow channel is reasonable, and the airflow noise is effectively reduced; the outlet of the smoke collecting hood is arranged to be of a porous net structure, so that eddy current generated when air flow passes through the smoke collecting hood can be effectively reduced, and meanwhile, the uniformity of the air flow is improved, namely, turbulent flue gas entering the smoke collecting hood is rectified through the porous structure, so that the speed of the air flow entering the volute is uniform, impact noise to the wind wheel is effectively reduced, vibration noise caused by unstable air flow is further reduced, the noise reduction effect is good, and the use experience of a user is improved;

meanwhile, the wind wheel is of the inserting piece type structure, so that blades of the wind wheel are of smooth transition arc-shaped structures, the surfaces of the blades are smooth and made of aluminum alloy materials, the friction resistance between airflow and the blades can be reduced, and the surface boundary layer of the blades is thin, so that the problem of reduction of air discharge caused by the thickness of the boundary layer is not easy to generate, the efficiency of the fan is effectively improved, and meanwhile, the noise generated by boundary layer separation is reduced;

in addition, in the embodiment, the flow channel of the volute conforms to the Archimedes spiral line type, so that the flow channel has small flow resistance, smooth air exhaust and low noise; by arranging the heat dissipation assembly, air disturbance between the motor and the volute can be enhanced, air circulation is accelerated, continuous convection heat exchange is formed during operation, the surface temperature rise of the motor and the volute is reduced, and the service life of the motor and the volute is prolonged; through set up down draught prevention separation blade in the exhaust port, can prevent effectively in the north that the external cold air from flowing backward into the machine inside, avoid inside temperature to hang down frost crack water route part and other spare parts excessively.

Example 2

The embodiment 2 of the utility model provides a gas water heater, this gas water heater includes embodiment 1's exhaust structure.

The gas heater of this embodiment is through setting up above-mentioned exhaust structure, and exhaust structure's the noise of airing exhaust is low, air current distribution is more even, and exhaust structure's runner is reasonable simultaneously, and turbulent flow is even through collection petticoat pipe back air velocity distribution, and the vortex forms for a short time, and the noise that the vortex drops and produces is low, utilizes the gas heater noise of above-mentioned exhaust structure to compare in original gas heater and reduces 2 ~ 4dB, and the noise obviously improves, and the complete machine temperature is low, the reliability is high simultaneously.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air exhaust structure for a gas water heater is characterized by comprising a fume collecting hood (1), a volute (2), a wind wheel (3), a motor (4) and a smoke exhaust port (5);

the exhaust fume collecting hood (1) comprises an inlet (11) and an outlet (12), wherein the outlet (12) is of a porous net structure and is used for reducing vortex when airflow passes through and improving airflow uniformity;

import (11) are connected with gas heater's heat exchange assembly, the air inlet of spiral case (2) with export (12) are connected, exhaust port (5) with spiral case (2) intercommunication sets up, wind wheel (3) set up in spiral case (2), motor (4) are fixed in on spiral case (2) through the support for drive wind wheel (3) rotate.

2. An exhaust structure according to claim 1, wherein the exhaust fume collecting hood (1) is a streamline structure, the exhaust fume collecting hood (1) comprises a fume inlet portion (13), a flow guiding portion (14) and a fume exhaust portion (15) which are sequentially connected from bottom to top, the fume inlet portion (13) is a linear hood corresponding to a fume outlet of the gas water heater, the inlet (11) is arranged at the fume inlet portion (13), the flow guiding portion (14) is inclined towards the fume exhaust portion (15), an included angle is formed between the flow guiding portion (14) and an outer wall of the fume inlet portion (13), the included angle is an obtuse angle, the outlet (12) is arranged at the fume exhaust portion (15), and the direction of the outlet (12) is perpendicular to the direction of the inlet (11).

3. An air exhaust structure according to claim 1 or 2, characterized in that the outlet (12) is a circular through hole capable of matching with the air inlet of the volute (2), the outlet (12) is provided with a porous net plate, the holes of the porous net plate are circular holes, and the sum of the areas of the circular holes of the porous net plate is equal to the area of the outlet (12).

4. An air exhaust structure according to claim 3, wherein the diameter of the circular holes is 2-10 mm.

5. The exhaust structure according to claim 1, wherein the wind wheel (3) is of a plug-in sheet type structure, and the blades of the wind wheel (3) are of an arc structure in smooth transition, and the surface of the arc structure is smooth so as to reduce the friction resistance between the airflow and the blades; the blade is made of an aluminum alloy material.

6. An air exhaust structure according to claim 1, wherein the volute (2) comprises a left volute (21) and a right volute (22) which can be fastened with each other, and the cross-sectional line of the volute (2) adopts an Archimedes spiral.

7. An air exhaust structure according to claim 1, further comprising a heat dissipating assembly (6), wherein the heat dissipating assembly (6) is disposed between the volute (2) and the motor (4) for enhancing air flow between the motor (4) and the volute (2) to form convective heat transfer.

8. An air exhaust structure according to claim 7, wherein the heat dissipation assembly (6) comprises a heat dissipation wind wheel and a plurality of heat dissipation blades (61) arranged on the heat dissipation wind wheel, and the heat dissipation wind wheel is coaxially arranged with the wind wheel (3) and the motor (4).

9. An exhaust structure according to claim 1, wherein the exhaust fume collecting hood (1) and the volute (2) are made of an electrolyte sheet material, and the exhaust port (5) is made of a stainless steel material.

10. A gas water heater comprising the air discharge structure according to any one of claims 1 to 9.