CN112066556A

CN112066556A - Smoke exhaust end pipe, smoke exhaust pipe assembly comprising smoke exhaust end pipe and gas appliance system adopting smoke exhaust pipe assembly

Info

Publication number: CN112066556A
Application number: CN202010815181.9A
Authority: CN
Inventors: 黄敬成; 张跃文
Original assignee: Vaillant Wuxi Heating Equipment Co Ltd
Current assignee: Vaillant Wuxi Heating Equipment Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2020-12-11

Abstract

The invention provides a smoke exhaust end pipe which extends along an axial direction and is provided with a first end part and a second end part which are opposite to each other in the axial direction. The smoke exhaust end pipe is also provided with an expansion part positioned between the first end part and the second end part, and the expansion part is provided with a plurality of openings for smoke to pass through. Because the smoke exhaust end pipe is provided with the expansion part, the external axial airflow is guided by the expansion part and is diffused outwards in the radial direction, so that the external airflow is effectively blocked, and the smoke can be smoothly exhausted.

Description

Smoke exhaust end pipe, smoke exhaust pipe assembly comprising smoke exhaust end pipe and gas appliance system adopting smoke exhaust pipe assembly

Technical Field

The invention belongs to the field of household gas equipment, and particularly relates to a smoke exhaust pipeline for gas equipment.

Background

Household gas appliances, such as gas-fired water heating apparatuses, generally include a gas water heater and a gas boiler. Taking a gas water heater as an example, a burner, a heat exchanger, and a piping system are generally disposed therein. The burner often includes a plurality of fire row sheets arranged side by side, each fire row sheet has a gas-air mixing channel, gas and air can be mixed in the fire row sheet and transferred to fire holes at the top of the fire row sheet to be combusted in the combustion chamber and generate heat, the generated heat can heat water in the heat exchanger, and then the heated water can be output through a pipeline system to meet the supply requirement of domestic hot water for drinking, bathing and the like. The gas boiler can be used for providing domestic hot water and can also be communicated with a radiator arranged indoors to provide a central heating function.

A fan and a smoke hood are also usually installed in the gas water heating equipment. The fan is used for supplying air to the combustor and discharging waste flue gas generated by combustion through the smoke cover. For the gas water heating equipment installed indoors, a smoke hood of the gas water heating equipment is also connected with a smoke exhaust pipeline penetrating through a wall, the tail end of the smoke exhaust pipeline is closed, a smoke exhaust hole is usually formed in the circumferential side wall of the part close to the tail end, and smoke is exhausted outdoors through the smoke exhaust hole. However, when outdoor wind is large, especially external airflow facing the wall, turbulence is formed on the outer surface of the smoke tube to cause difficulty in discharging smoke, so that smoke discharging efficiency is reduced, insufficient combustion may be caused, or phenomena such as deflagration and flameout occur, and smoke discharging does not reach the standard, or potential safety hazards are brought to users.

Disclosure of Invention

The invention aims to provide a smoke exhaust end pipe which has high wind resistance so as to facilitate smooth smoke exhaust.

The invention also aims to provide a smoke exhaust pipe assembly comprising the smoke exhaust end pipe.

The invention also aims to provide a gas appliance system adopting the smoke exhaust pipe assembly.

To achieve one of the above objects, the present invention provides a smoke exhaust end pipe extending in an axial direction and having a first end portion and a second end portion which are axially opposite to each other. The smoke exhaust end pipe is also provided with an expansion part positioned between the first end part and the second end part, and the expansion part is provided with a plurality of openings for smoke to pass through.

As a further development of the invention, the maximum radial dimension of the expansion is greater than both the diameter of the first end and the diameter of the second end.

As a further development of the invention, the diameters of the first end and the second end are the same, and the difference between the maximum radial dimension of the expansion and the diameter of the first end or the second end is more than 40 mm.

As a further development of the invention, at least the expansion in the smoke exhaust end pipe is made of an elastic material.

As a further development of the invention, the expansion is made of spring steel.

As a further development of the invention, the first end of the fume extractor tube is closed and the expansion extends obliquely radially outwards at the junction with the first end.

As a further improvement of the present invention, the radial dimension of the expanded portion gradually increases from both axial ends of the expanded portion toward the middle.

To achieve the above another object, the present invention further provides a smoke exhaust pipe assembly. The smoke exhaust pipe assembly comprises a smoke exhaust pipeline and the smoke exhaust end pipe arranged at the tail end of the smoke exhaust pipeline.

As a further improvement of the invention, a plurality of smoke exhaust holes are distributed on the tail end of the smoke exhaust pipeline, and the expansion part of the smoke exhaust end pipe surrounds the smoke exhaust holes.

In order to achieve the above another object, the present invention further provides a gas appliance system, which comprises the above smoke exhaust pipe assembly and a gas appliance, wherein the smoke exhaust pipe assembly is connected with the gas appliance to exhaust smoke produced by the gas appliance.

Compared with the prior art, the invention has the beneficial effects that: because the smoke exhaust end pipe is provided with the expansion part, the external axial airflow is guided by the expansion part and is diffused outwards in the radial direction, so that the external airflow is effectively blocked, and the smoke can be smoothly exhausted. Through tests, compared with the traditional smoke exhaust pipeline, the wind resistance of which can only reach 13m/s (meter/second), the smoke exhaust pipe assembly can resist 17m/s wind speed, and the wind resistance is between 7-8 levels.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings related to the present invention in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic plan view of one embodiment of the gas appliance system of the present invention;

FIG. 2 is a perspective view of a smoke exhaust duct assembly of the gas appliance system shown in FIG. 1;

FIG. 3 is an exploded perspective view of the smoke exhaust tube assembly shown in FIG. 2;

figure 4 is a plan view of a smoke exhaust end tube of the smoke exhaust tube assembly shown in figure 3.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

The gas appliance uses combustible gas as fuel, such as natural gas, city gas, liquefied gas, methane and the like, and supplies heat to meet the living needs of users by burning the combustible gas, for example, a gas water heater for supplying living hot water, a gas boiler for simultaneously supplying the living hot water and the heating needs, a gas cooker, a range hood and the like.

The gas appliance system of the present invention may include a gas-fired hot water appliance as shown in fig. 1, the gas-fired hot water appliance 10 being exhausted through a smoke exhaust duct assembly. The gas water heater includes a housing, a burner accommodated in the housing for burning a mixture of gas and air, a heat exchanger, a smoke collecting hood, and a fan. The heat generated by the combustion of the burner is absorbed by the water flow flowing through the heat exchanger so as to generate hot water; the smoke generated by combustion is collected by the smoke collecting hood under the driving of the fan and is exhausted through the smoke exhaust pipe assembly connected with the smoke collecting hood. Since the construction and arrangement of the above-described constituent components of the gas-fired water heating apparatus are well known to those skilled in the art, the applicant will not be described herein in detail.

Referring collectively to fig. 2 and 3, a smoke exhaust duct assembly comprising a smoke exhaust duct 20 and a smoke exhaust end duct 30 extends axially through an aperture 90 in the wall. The smoke evacuation line 20 may be formed by connecting a plurality of straight pipes or bent pipes having the same diameter, and the diameter of the smoke pipes is smaller than the diameter of the opening 90 in the wall. The smoke evacuation line 20 has a distal end 21, which in this embodiment may be a single straight smoke tube with a plurality of smoke evacuation holes 211 distributed around the circumferential sidewall thereof. The smoke exhaust end pipe 30 may be installed at the end of the smoke exhaust duct 20. As shown in fig. 4, the smoke exhaust end tube 30 extends in an axial direction (as shown in the central axis of the figure) and has axially opposite first and

second ends

311 and 312, and an expansion portion 313 between the pair of ends. In the present embodiment, the expansion portion 313 is substantially lantern-shaped, i.e., its radial dimension gradually increases from near both axial ends thereof toward the middle. The expansion portion 313 is provided with a plurality of openings 314 for smoke to pass through, and the openings 314 extend between the first end portion 311 and the second end portion 312 and are distributed at intervals. The first end 311 is closed by a cap 32, the second end 312 fits tightly around the outer periphery of the end 31 of the smoke evacuation pipe, and the expansion surrounds the smoke evacuation holes 211 in the end 21. In other embodiments, the first end 311 of the smoke evacuation pipe can also be tightly fitted over the end 31 of the smoke evacuation pipe, and the end cap 32 can axially close the end 31 of the smoke evacuation pipe.

As shown in fig. 4, the expanded portion 313 has a maximum radial dimension L in a radial direction perpendicular to the axial direction. It should be noted that in other embodiments, the expansion portion 313 may have an irregular shape, and the radial cross section thereof may be non-circular. The maximum radial dimension L is greater than both the diameter of the first end 311 and the diameter of the second end 312. In the present embodiment, the first end 311 and the second end 312 have the same diameter. For good wind resistance, the difference (L-D) between the maximum radial dimension L and the diameter D of the first end 311 or the second end 312 is preferably greater than 40 mm. For example, if the diameter D of the first end 311 and the second end 312 is 60 mm, the maximum radial dimension L of the expansion 313 is at least greater than 100 mm. Since the wall opening 90 is typically 80 mm or 100 mm, which may cause the discharge end 30 to be deformed by being pressed through the wall opening 90, at least the expansion 313 of the discharge end 30 may be made of an elastic material, so that the expansion 313 may be elastically restored to its original size or slightly smaller after passing through the wall opening 90, although it is pressed when passing through the wall opening 90. In the present embodiment, the expansion part 313 is made of spring steel. The spring steel can be carbon spring steel or alloy spring steel; and the spring steel can be selected from other steels, such as high-quality carbon structural steel, carbon tool steel, high-speed tool steel and stainless steel. In this embodiment, a carbon spring steel, such as 65Mn manganese steel, may be used, which has a high elastic limit and a high yield ratio, and a yield strength of 785Mpa (Mpa) to avoid permanent deformation under high load.

As shown in fig. 2, when there is an external airflow facing the wall, the expansion portion 31 extends radially outward at the joint with the first end portion 311 in an inclined manner, so that the external airflow is guided to spread around the expansion portion 313 (as shown by arrows in the figure). In this manner, even if a portion of the airflow passes through the opening 314, it is not sufficient to suppress the flue gas escaping through the smoke evacuation holes 211 of the smoke evacuation duct. Also, since the external air flow substantially adheres to the side of the expanded portion 313 close to the first end portion 311 and spreads radially outward, the influence of the external air flow on the side of the expanded portion 313 close to the second end portion 312 is small, so that even if the discharge of smoke is difficult on the side of the expanded portion 313 close to the first end portion 312, the smoke can be smoothly discharged from the side of the expanded portion 313 close to the second end portion 312 without being greatly hindered. In other embodiments, the end 21 of the smoke evacuation pipe 20 with the smoke evacuation holes 211 may also be omitted, i.e. the smoke passing through the smoke evacuation pipe 20 is directly evacuated from the opening 314 of the expansion.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A smoke exhaust end tube extending in an axial direction and having axially opposed first and second ends; the method is characterized in that: the smoke exhaust end pipe is also provided with an expansion part positioned between the first end part and the second end part, and the expansion part is provided with a plurality of openings for smoke to pass through.

2. The smoke exhaust end pipe of claim 1, wherein: the maximum radial dimension of the expansion is greater than both the diameter of the first end portion and the diameter of the second end portion.

3. The smoke exhaust end pipe of claim 2, wherein: the diameters of the first and second end portions are the same, and the difference between the maximum radial dimension of the expanded portion and the diameter of the first or second end portion is greater than 40 mm.

4. The smoke exhaust end pipe of claim 1, wherein: at least the expansion part in the smoke exhaust end pipe is made of elastic material.

5. The smoke exhaust end pipe of claim 4, wherein: the expansion part is made of spring steel.

6. The smoke exhaust end pipe of claim 1, wherein: the first end of the smoke exhaust pipe is closed, and the expansion part extends outwards in an inclined and radial mode at the joint of the first end and the expansion part.

7. The smoke exhaust end pipe of claim 1, wherein: the radial dimension of the expansion part gradually increases from the two axial ends of the expansion part to the middle.

8. A tub subassembly of discharging fume which characterized in that: the assembly comprises a smoke evacuation duct and a smoke evacuation end pipe according to any preceding claim mounted at the end of the smoke evacuation duct.

9. The smoke exhaust tube assembly of claim 8, wherein: the tail end of the smoke exhaust pipeline is distributed with a plurality of smoke exhaust holes, and the expansion part of the smoke exhaust end pipe surrounds the smoke exhaust holes.

10. A gas appliance system, characterized by: the system comprises the smoke exhaust pipe assembly according to claim 8 or 9 and a gas appliance, wherein the smoke exhaust pipe assembly is connected with the gas appliance to exhaust smoke produced by the gas appliance.