JPH07217865A - Structure of air supplying and discharging tube - Google Patents

Abstract

PURPOSE:To prevent the generation of shortage of air supplying due to the adhesion of ice or snow, in a thin type air supplying and discharging tube. CONSTITUTION:In the air supplying and discharging tube of double structure, a flange type air chamber 3 is provided between the air discharging port 2a of an air discharging tube 2 and the air supplying port 1a of an air supplying port 1 while the air discharging tube 2 is provided with a communicating port 2b, detouring discharging air into the air chamber 3, whereby the whole of the flange type air chamber 3 is retained at a high temperature and the blockading trouble of an air supplying passage 5, which is due to the freezing of inflow snow and the like, can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supply / exhaust cylinder having a double structure of a supply cylinder for taking in air necessary for combustion from the outside and an exhaust cylinder for releasing exhaust gas and heat emitted from the combustor to the outside. The present invention relates to the structure of a thin air supply / exhaust cylinder that is not too far from the wall surface on the outdoor side.

[0002]

2. Description of the Related Art An exhaust pipe 12 is provided inside a supply cylinder 11 so as to have a double structure. The front end of the exhaust cylinder 12 is projected forward from the front end of the supply cylinder 11, and an exhaust port 1 is provided at the front end of the exhaust cylinder 12.
Recently, a thin air supply / exhaust cylinder as shown in FIG. 2 in which a partition plate 13 is provided between the air supply port 2a and the air supply port 11a provided at the tip of the air supply cylinder 11 is generally used.

A thin air supply / exhaust cylinder provided with a partition plate 13 has an exhaust port 12a of the exhaust cylinder 12 and a cylinder 1 of the cylinder 11.
Even if the straight line distance from 1a is short, the combustion exhaust gas is separated by the partition plate 13
It is a structure that does not flow toward the air supply port 11a because of being disturbed by. Therefore, the combustion exhaust gas is not mixed with the air sucked from the supply cylinder 11, and the combustion state of the combustor is not deteriorated, and the partition plate 13 has little influence of the wind from the front.

[0004]

The tip of the air supply / exhaust cylinder is projected to the outside of the room to take in the air required for combustion from the outside.
Although it emits exhaust gas to the outside of the room, weather and climatic conditions vary widely, and unexpected accidents may occur.

As shown in FIG. 2, in the case where a partition plate is provided at the tip of the exhaust pipe, the exhaust does not go around to the intake side even if the linear distance between the exhaust port and the intake port is short, and the front of the intake / exhaust pipe is shown. Even if a strong wind blows from it, it rarely interferes with air supply and exhaust,
It is often used in thin air supply and exhaust stacks. But,
When snowstorms blow against this partition plate in cold regions, the edge of the partition plate is immediately cooled to a low temperature, and a thin film of snow or ice may form on the entire circumference with the wall surface. Ice can impede air supply, causing accidents where the combustor causes incomplete combustion due to insufficient air supply.

[0006]

In order to solve the above problems, according to the present invention, a dual structure of a supply / exhaust cylinder in which an exhaust cylinder 2 is arranged inside a supply cylinder 1 is provided. A supply port 1a is provided which penetrates through the end of the supply cylinder 1 to take in the combustion air near the wall surface A, and an exhaust port 2a which is provided at the tip of the exhaust pipe 2 to exhaust the air away from the supply port 1a. In the exhaust stack, a collar-shaped empty chamber 3 is provided between the exhaust port 2a of the exhaust stack 2 and the air supply port 1a of the supply cylinder 1, and the exhaust stack 2 has a communication port 2b for bypassing the exhaust gas to the empty chamber 3. The structure of the air supply / exhaust pipe provided is such that even if snow falls on the air supply / exhaust pipe, it will melt immediately without snowfall.

An outer wall flange 4 is provided along the wall surface A at the end of the supply cylinder 1, and the outer wall flange 4 and the collar-shaped vacant chamber 3 are provided.
And an outer wall flange 4 and the outer periphery of the flange-shaped empty chamber 3 are substantially air inlets. It became difficult to be blocked by snow and ice.

[0008]

The air required for combustion is sent from the air supply cylinder 1 to the combustor installed on the indoor side connected to the air supply / exhaust pipe through the air supply port 1a on the outdoor side, and exhaust gas and heat generated from the combustor are discharged. It is discharged to the outside from the exhaust port 2a through the cylinder 2. At this time, a part or all of the exhaust gas / heat is diverted from the communication port 2b into the collar-shaped vacant chamber 3 and reaches the exhaust port 2a while heating the vacant chamber 3 to a high temperature at the exhaust temperature. 3 melts even if snow falls, and has a function of not blocking the air supply port 1a.

Further, an outer wall flange 4 is provided along the wall surface A at the outer end edge of the supply cylinder 1, and an air supply passage 5 is formed between the flange-shaped cavity 3 and the outer wall flange 4. The air entering the air supply passage 5 from the outer peripheral gap between the air chamber 4 and the vacant chamber 3 increases in temperature in the high temperature vacant chamber 3 toward the air supply port 1a, and the outer peripheral gap between the vacant chamber 3 and the outer wall flange 4 is increased. Is a substantial air supply port. For this reason, even if a part of the outer peripheral gap is blocked by snow or ice, the outer peripheral gap of the other part keeps an open circuit, and has a function of preventing abnormal combustion of the combustor due to inability to supply air.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described below with reference to the drawings showing an embodiment. 1 is a supply cylinder, 2 is an exhaust cylinder, and the exhaust cylinder 2 is a supply cylinder 1.
Is arranged in a double structure inside with a gap, and this air supply / exhaust cylinder is attached so as to penetrate through a wall surface A that partitions the inside and outside of the chamber. The indoor side of the air supply / exhaust pipe is connected to a combustor (not shown),
Combustion air is supplied from the outside by the supply cylinder 1, and exhaust gas and heat emitted from the combustor are released to the outside by the exhaust cylinder 2.

Reference numeral 1a denotes an air supply port which is formed at a tip of an outer side of the supply cylinder 1 at a distance from the exhaust pipe 2, and 2a denotes an exhaust port provided at a front end of the exhaust pipe 2. Reference numeral 4 denotes an outer wall flange connected to the outdoor side edge of the supply cylinder 1 and extending along the outside of the wall surface A. Reference numeral 3 denotes a collar provided between the exhaust port 2a of the exhaust cylinder 2 and the supply port 1a of the supply cylinder 1. Vacant chamber 2b is a vacant chamber 3 provided in the exhaust stack 2 and the exhaust stack 2
At the communication port 2b that communicates with the inside, all or part of the exhaust gas and heat of the exhaust stack 2 is diverted from the communication port 2b into the vacant chamber 3 to heat the inner and outer walls 3a and 3b that form the vacant chamber 3. To do.

Reference numeral 5 denotes an air supply passage formed between the outer wall flange 4 and the inner wall 3a of the vacant chamber 3, and the air supply passage 5 has an air supply opening 1a.
And the heat is dissipated from the inner wall 3a that has become hot,
Heat is applied to the air in the air supply passage 5 and the outer wall flange 4. 6.
Reference numerals 7 and 8 and 9 are joints on the indoor side of the air supply / exhaust pipe, and any two of them are connected to the air supply side and the exhaust side of the combustor, and the other two are closed by attaching a blind cap.

Reference numeral 10 denotes a heat insulating material which is attached between the outer wall flange 4 and the wall surface A also as a seal, and raises the temperature of the outer wall flange 4 by radiating heat from the collar-shaped cavity 3.
It works to melt the snow adhering to the outer peripheral edge of the exposed outer wall flange 4.

[0014]

As described above, according to the present invention, the collar-shaped empty chamber 3 is provided between the exhaust port 2a of the exhaust cylinder 2 and the air supply port 1a of the supply cylinder 1, and the exhaust gas is bypassed to the empty chamber 3. Therefore, even if the entire vacant chamber 3 maintains a temperature close to the exhaust temperature and snow is blown to the exhaust tube 2 and the vacant chamber 3 protruding from the wall surface A, they are immediately melted and the air supply passage 5 is blocked with snow. The ice film is gone,
The problem of poor combustion due to insufficient air supply was resolved.

Further, since the outer wall flange 4 is provided on the wall surface A and the air supply passage 5 is formed between the outer wall flange 4 and the vacant chamber 3, the vacant chamber 3 radiates heat toward the facing outer wall flange 4 to the air supply passage 5. The sucked air is warmed, and the outer peripheral gap between the outer wall flange 4 and the vacant chamber 3 serves as a substantial air intake. Therefore, the opening area of the outer peripheral gap of the outer wall flange 4 becomes larger than that of the air supply port 1a at the tip of the supply cylinder 1, and if the snow melted on the surface of the vacant chamber 3 becomes water and flows downward and freezes. However, there is almost no possibility of covering the entire outer peripheral gap, and combustion failure due to insufficient air supply does not occur.

Further, since the vacant chamber 3 is formed in a brim shape,
Even if a strong wind blows from the front, the exhaust gas does not flow into the air supply port 1a or the air supply passage 5 and does not interfere with the air supply. It is slightly more costly than the one with a conventional partition plate or wind shield plate. The higher the level, the more effective the performance.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing an example of a conventional product.

[Explanation of symbols]

 1 Supply Cylinder 1a Air Supply Port 2 Exhaust Cylinder 2a Exhaust Port 2b Communication Port 3 Vacancy 4 Outer Wall Flange 5 Air Supply Path

Claims (2)

[Claims] 1. A dual structure supply / exhaust cylinder having an exhaust cylinder 2 arranged inside a supply cylinder 1, the supply / exhaust cylinder penetrating a wall surface A, and combustion near the wall surface A at the end of the supply cylinder 1. In an air supply / exhaust tube having an air intake port 1a for taking in air and an exhaust port 2a for exhausting air at a position apart from the air intake port 1a at the tip of the exhaust tube 2, the exhaust port 2a of the exhaust tube 2 and the air supply cylinder 1 are provided. The structure of the air supply / exhaust cylinder in which the collar-shaped empty chamber 3 is provided between the air supply port 1a and the exhaust port 2 and the communication port 2b for bypassing the exhaust gas is provided in the empty chamber 3. 2. An outer wall flange 4 along a wall surface A is provided at an end of the supply cylinder 1, and an air supply passage 5 is formed between the outer wall flange 4 and the flange-shaped empty space 3 to reach the empty space 3. The structure of the air supply / exhaust cylinder according to claim 1, wherein the bypassed exhaust heat is radiated to the air supply passage 5.