JPH0526431A - Air-supplying and exhausting device - Google Patents

Abstract

PURPOSE:To prevent rainwater from entering an air-supplying passage and to make combustion stable even in a strong wind at the same time. CONSTITUTION:An exhaust sleeve 5 through which exhaust gas produced by a combustion apparatus is passed, a supply sleeve 3 which is provided on the outside of this exhaust sleeve 5 and between them, forms an air-supplying passage 6 passing the air supplied into the combustion apparatus, a decorative cover 7 which is provided around an exhaust outlet part 5A on the exhaust sleeve 5 projecting beyond the top part of this supply sleeve 3, and an external flange 10 which is provided on the periphery of the supply sleeve 3 so as to be opposed to this decorative cover 7, are provided. Furthermore, a throttling part 11B is provided at the top part of the supply sleeve 3 and projects outwardly of the external flange 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply / exhaust device used in an outdoor air supply / exhaust type combustion device, and more particularly to a air supply / exhaust device in which a projecting dimension of an air supply / exhaust portion exposed to the outside can be minimized.

[0002]

2. Description of the Related Art As this type of air supply / exhaust device, for example,
As disclosed in Japanese Unexamined Patent Publication No. 1-310222, a feed cylinder having an open tip is concentrically provided outside an exhaust pipe forming an exhaust passage through which exhaust gas from a combustion device passes, and the cylinder is connected to the exhaust cylinder. A makeup passage is formed between the cylinder and a combustion air supply passage to allow the combustion air to be supplied to the combustion device, and a makeup having a trumpet-shaped exhaust guide surface at the exhaust outlet portion of the exhaust cylinder protruding from the tip of the supply cylinder. While a cover is provided, an outward flange facing the decorative cover is provided at the tip of the supply cylinder at a distance from the decorative cover, so that the protruding size of the air supply / exhaust section exposed to the outside can be minimized. Exhaust devices are known.

[0003]

In the air supply / exhaust device described above, the open surface of the tip of the supply cylinder, which is the inlet of the air supply passage, is flush with the outer surface of the outward flange provided on the outer periphery of the supply cylinder tip. Because of this, there is a concern that rainwater may enter the air supply passage along the outer surface of this outward facing flange, and the air supply passage is easily affected by wind. If it enters between the facing flanges, the amount of air supplied to the combustion device becomes excessive, causing lift combustion and extinguishing the fire.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a supply / exhaust device capable of suppressing combustion of rainwater into the supply passage and stabilizing combustion even in strong wind. There is.

[0005]

DISCLOSURE OF THE INVENTION The present invention is directed to an exhaust pipe for passing exhaust gas from a combustion device, and an air supply pipe provided outside the exhaust pipe for passing air supplied to the combustion device between the exhaust pipe and the exhaust pipe. A supply cylinder having a passage formed therein, a decorative cover provided at an exhaust outlet portion of an exhaust cylinder protruding from a tip of the supply cylinder, and an outward flange provided on an outer periphery of the supply cylinder so as to face the decorative cover. And a throttle portion is provided at the tip of the supply cylinder, and the throttle portion is projected further than the outward flange.

[0006]

[Function] As described above, the throttle portion is provided at the tip of the supply cylinder,
Since the throttle portion is projected further than the outward flange, the rainwater that has flowed down the surface of the outward flange bypasses the periphery of the throttle portion and falls, and air is supplied from the open end surface of the throttle portion. Rainwater can be prevented from entering the air supply passage without entering the passage. Further, since the throttle portion is provided at the tip of the supply cylinder, the wind that has entered the space between the decorative cover and the outward flange is guided by the outer surface of the throttle portion in the direction away from the air supply passage inlet. Since the air flows toward the combustion device, there is no concern that the amount of air supplied to the combustion device will be excessive due to the influence of the wind, the wind resistance is significantly improved, and stable combustion is performed even in strong wind.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings of FIGS. 1 and 2,
Reference numeral 1 is a mounting wall such as a chamber wall, 2 is a through hole formed in the mounting wall 1, the base end of which is located indoors, and the tip of the through hole 2 projects slightly outside the through hole 2. The cylinder-shaped supply cylinder 3 is fixed so as to penetrate therethrough. Inside the supply cylinder 3, a cylindrical exhaust cylinder 5 having an exhaust passage 4 for passing exhaust gas from a combustion device (not shown) is concentrically formed. An air supply passage 6 that is fixedly held and that allows combustion air to be supplied to the combustion device is formed between the exhaust cylinder 5 and the supply cylinder 3.

The exhaust pipe 5 has a base end located indoors, and a tip end portion thereof is about 50 to 70 m from the tip end of the supply cylinder 3.
m projected outward, and the projected exhaust outlet portion 5A has
A decorative cover 7 protruding in the outer peripheral direction is attached to the outer peripheral surface of the exhaust pipe 5, and the decorative cover 7 has an exhaust guide portion 7A that expands in a trumpet shape toward the front in a substantially central portion,
Outside the exhaust guide portion 7A, there is provided a cover portion 7B which expands rearward in a trumpet shape. Reference numeral 8 is a windproof cap that closes the tip of the exhaust pipe 5, and 9 and 9 are a plurality of exhaust ports provided on the peripheral wall of the exhaust outlet 5A of the exhaust pipe 5, and the exhaust gas exhausted from these exhaust ports 9 and 9 is , Makeup cover 7
Guided by the exhaust guide portion 7A and the windproof cap 8 and is jetted obliquely forward of the exhaust pipe 5.

The tip of the supply cylinder 3 is open, and the front end of the supply cylinder 3 has an interval X of about 8 to 12 mm from the decorative cover 7 so as to face the decorative cover 7. I am wearing. Reference numeral 11 denotes a wind resistant ring provided at the tip of the supply cylinder 3.
Is a ring-shaped fixed portion 11A fixed to the outward flange 10, and a tapered tapered annular throttle wall 11B which is provided integrally with the fixed portion 11A and whose tip has an inner diameter smaller than the inner diameter of the supply cylinder 3. And the tip of the annular throttle wall 11B projects about 5 to 8 mm forward from the surface of the outward flange 10, and the open end surface of the throttle wall 11B serves as the substantial inlet of the air supply passage 6. It will be.

In the above structure, the F installed in a room or the like
When a combustion device such as an F-type oil warm air heater is operated, the exhaust gas sent from this combustion device is exhausted through the exhaust passage 4 in the exhaust stack 5.
Through the exhaust ports 9 and 9. On the other hand, the outdoor air passes through the space X between the decorative cover 7 and the outward flange 10 and enters the space A between the decorative cover 7 and the outward flange 10, and is supplied from the open end surface of the wind resistant ring 11. It is sucked into the cylinder 3 and sent to the combustion device through the air supply passage 6.

Here, when rainwater adheres to the upper part of the outward flange 10 during rainfall, and this rainwater flows down along the surface of the outward flange 10, the rainwater is directed to the outward flange 10.
Annular diaphragm wall 11 of wind resistant ring 11 protruding further than
Since it bypasses around B and flows downward, the annular throttle wall 11
It is possible to prevent rainwater from entering the air supply passage without entering the air supply passage 6 from the open end surface of B, and to cause rust on the inner peripheral surface of the air supply cylinder due to the intrusion of rainwater. The situation can be suppressed for a long time, and the durability is greatly improved.

Further, when a strong wind such as a gust of wind enters the space between the decorative cover and the outward flange, the tapered cylinder-shaped annular diaphragm wall 11B is provided at the tip of the supply cylinder.
The decorative cover 7 and the outward flange 1 are arranged.
The wind that has entered the space b between 0 and 0 is guided by the outer surface of the tapered tapered annular diaphragm wall 11B and flows in a direction away from the open end surface of the annular diaphragm wall 11B.
It becomes difficult to enter the air supply passage 6. Therefore, there is no fear that the amount of air supplied to the combustion device will be excessive due to the influence of wind, the wind resistance will be significantly improved, and the combustion device will not cause list combustion and extinguish even in strong winds. Can maintain stable combustion.

FIG. 3 shows another embodiment of the present invention, in which the leading end portion of the supply cylinder 3 is drawn into a tapered shape to form a narrowed portion 12, and the narrowed portion 12 is formed on the outward flange 10. You may make it protrude about 5 to 8 mm ahead from the surface of. In this case, there is an advantage that the structure is simplified and the number of parts is not increased.

[0014]

As described above, according to the present invention, rainwater enters the air supply passage by providing the throttle portion at the tip of the supply cylinder and projecting the throttle portion further than the outward flange. It is possible to prevent rusting, suppress the generation of rust, improve the durability, and remarkably improve the wind resistance, so that stable combustion can be maintained even in strong wind.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a state in which an air supply / exhaust device according to an embodiment of the present invention is attached to a mounting wall.

FIG. 2 is a perspective view of an essential part of a state in which a part of an exhaust stack is also cut.

FIG. 3 is a cross-sectional view of an essential part of a state in which an air supply / exhaust device according to another embodiment of the present invention is attached to a mounting wall.

[Explanation of symbols]

 3 Supply Cylinder 5 Exhaust Cylinder 5A Exhaust Outlet 6 Air Supply Passage 7 Decorative Cover 10 Outward Flange 11B Annular Ring Wall of Windproof Ring (Throttle) 12 Throttle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Saito 2-18 Keihan Hondori, Moriguchi-shi Sanyo Electric Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. An exhaust pipe for passing exhaust gas from a combustion device, and an air supply passage provided outside the exhaust pipe for passing air supplied to the combustion device between the exhaust pipe and the exhaust pipe. A supply cylinder to be formed, a makeup cover provided at the exhaust outlet portion of the exhaust cylinder protruding from the tip of the supply cylinder, and an outward flange provided on the outer periphery of the supply cylinder so as to face the makeup cover. A supply / exhaust device, wherein a throttle portion is provided at a tip end portion of the supply cylinder, and the throttle portion is projected further than the outward flange.