JP4702892B2 - Vertical exhaust or supply / exhaust top for forced supply / exhaust combustion equipment - Google Patents

Description

  The present invention relates to a combustion device typified by a stove and a boiler, which takes in combustion air from the inside or outside of the room and exhausts combustion exhaust forcibly to the outside. More specifically, the present invention relates to a vertical exhaust or a supply / exhaust top that is used by being attached to an exhaust pipe or a top of a supply / exhaust pipe installed outdoors on a soot.

  Conventional supply / exhaust methods for combustion equipment with combustion exhaust are roughly divided into a natural exhaust method (CF type device), a forced exhaust method (FE type device), and a forced supply / exhaust method (FF type device). Among these, the CF type equipment is a system in which the combustion exhaust of the equipment is discharged to the outdoors only by the draft force of the exhaust, and therefore the exhaust pipe of the exhaust system to be attached is required to be extended to some extent in the soot direction. On the other hand, since FE and FF type equipment exhausts the combustion exhaust of equipment to the outdoors using the power of the exhaust fan (supply / exhaust fan), the mounting direction of the supply / exhaust pipe is compared with the CF type above. High degree of freedom. For example, the air supply / exhaust top described in Japanese Patent Application Laid-Open No. 2002-340329 is provided with a through hole in the outer wall, and the air supply / exhaust port is inclined downward in the through hole to prevent rainwater intrusion and drain backflow. The amount of protrusion (exposed) from the outer wall to the outdoors is very small.

  However, in the case of a site where the supply / exhaust top cannot be installed sideways due to the conditions of the construction site, etc., it is necessary to install the supply / exhaust pipe on the ridge. At this time, if the conventional horizontal type air supply / exhaust top is attached as it is, rainwater can freely enter or the drain flows backward, so it is necessary to take measures against rainwater to the perfect. As a result, there arises a problem that the pressure loss is inevitably increased and the load on the fan is increased.

  Also, in cold regions, the water vapor component contained in the combustion exhaust is condensed on the outer surface of the exhaust pipe due to a decrease in the outside air temperature and flows down as water droplets. A phenomenon of freezing in the air supply / exhaust pipe occurs, causing various troubles.

  For the above reasons, the conventional FE type and FF type exhaust or supply / exhaust top cannot be used in a vertical shape as it is, and no examples have been used. Further, since the conventional exhaust or supply / exhaust top that is mounted sideways has not been developed for large-sized combustion devices, there is a disadvantage that it cannot be applied to these large-sized combustion devices.

  The present invention is provided in view of the above points, and its purpose is to prevent rainwater from entering, low pressure loss, and freezing of drain water when installed and used in a heel direction. Another object is to provide a vertical exhaust or supply / exhaust top that can also be used as an exhaust or supply / exhaust top for large combustion equipment.

In order to achieve the above object, according to the first aspect of the present invention, in the vertical exhaust top for forced exhaust type combustion equipment, the inner pipe side of the double pipe raised vertically is the top exhaust pipe, and the outer pipe side is A top air supply / exhaust pipe composed of a top air supply pipe and having an upper end opening of the top exhaust pipe positioned at a position protruding above the upper end opening of the top air supply pipe;
Above the upper end opening of the top air supply pipe, the center is fixed to the top exhaust pipe, covers the upper end opening of the top air supply pipe, and the outer periphery and the outer periphery of the top air supply pipe An air inlet formed between the air inlet and the air supply surface, and a top cover having a downwardly saddle-like shape for taking combustion air into the top air supply pipe from the air inlet via the upper end opening of the top air supply pipe. With the top,
The top plate of the exhaust chamber surrounded by the top plate, the peripheral side wall, and the bottom plate is formed in a cross-sectional mountain shape, and an exhaust port is formed around the lower portion of the peripheral side wall, and the top exhaust pipe is vertically raised. An exhaust top configured such that an upper end opening passes through the bottom plate and is positioned in the exhaust chamber;
A cover plate having an umbrella-like spread located at a lower portion of the exhaust chamber of the exhaust top and having a central portion fixed to the top exhaust pipe;
It is characterized by comprising .

Furthermore, in the invention described in claim 2 , in the vertical supply / exhaust top for forced supply / exhaust type combustion equipment according to claim 1 , the outer diameter of the cover plate is made larger than the outer diameter of the top cover on the supply top side. It is characterized by having a large diameter.
According to the present invention, it is possible to prevent the exhaust gas from flowing backward to the supply side.

The present invention configured as described above has the following effects.
1. The exhaust top according to claim 1 is configured to temporarily exhaust the exhaust top into the exhaust chamber by positioning the upper end opening of the upward top exhaust pipe in the exhaust chamber surrounded by the top plate and the peripheral side wall provided with the exhaust port in the lower part. Even if there is a strong wind, there is no risk that rainwater will enter the exhaust pipe from the top opening and cause trouble.
2. Exhaust gas once flows into the exhaust chamber of the exhaust top, makes a U-turn in this space, and flows out from the exhaust port formed in the lower part of the peripheral side wall, so there are few resistance parts and pressure loss is small.
3. In cold regions, the top plate, peripheral wall, and bottom plate of the exhaust chamber are heated by the exhaust heat, so there is no concern that the water vapor component in the exhaust will drain and freeze.
4). Due to the above effects 1 to 3, it can be used as the top of a vertical exhaust pipe or supply / exhaust pipe and as a vertical exhaust or supply / exhaust top for a large-scale combustion device.

  The embodiment of the present invention described above will be described in detail with reference to FIGS. FIG. 1 is an explanatory view showing a state in which a combustion device, this air supply / exhaust pipe and the air supply / exhaust top according to the present invention are attached to the top of this air supply / exhaust pipe, and FIG. FIG. 3 is an explanatory view when the longitudinal cross section is centered on the supply / exhaust top, FIG. 4 is an explanatory view of the exhaust top, FIG. 5 is a cross-sectional view along the line AA ′, and FIG.

  First, in FIG. 1, reference numeral 1 is a supply / exhaust top according to the present invention, 100 is an FF combustion apparatus, 101 is a supply / exhaust pipe having a double pipe structure including an exhaust pipe 104 and an intake pipe 105. The air supply / exhaust pipe 101 is once raised in the vertical direction in the room, bent 90 ° in the horizontal direction, extended through the outer wall 102 to the outside, and further bent upward 90 ° and raised in the vertical direction. The supply / exhaust top 1 is attached to the upper end of the straight pipe portion 103. Reference numeral 2 denotes an exhaust top, which will be described later, constituting a member of the supply / exhaust top 1, and 3 denotes an air supply top.

  First, the exhaust top 2 will be described. As shown in FIGS. 2 to 4, the exhaust top 2 has a top plate 5 having a mountain-shaped cross section, and a peripheral side wall 6 below the top plate 5 facing downward. The bottom plate 7 is formed so as to have a small diameter and is inclined downward toward the outer periphery, and the exhaust ports 9 and 9a are formed in two stages along the circumference at the lower portion of the peripheral side wall 6. An exhaust chamber 4 in which the lower edge 8 of the lower exhaust port 9a of the exhaust ports 9 and 9a is flush with the upper surface of the bottom plate 7, an outer peripheral end 7a of the bottom plate 7 is in contact with the upper surface, and an umbrella And a cover plate 10 having an outer diameter larger than the outer diameter of the upper portion of the exhaust chamber 4, and an upper end opening 12 of a top exhaust pipe 11 raised vertically is provided in the exhaust. Passes through the center of the bottom plate 7 of the chamber 4 and enters the combustion chamber 4 and is located above the exhaust ports 9 and 9a. It is inserted manner to further the bottom plate 7 and the cover plate 10 is welded configured in this top exhaust pipe 11.

  In addition, the position of the upper end opening portion 12 of the top exhaust pipe 11 is higher than the upper exhaust port 9 and a space is ensured between the top plate 5 and in this embodiment, the exhaust chamber 4 is provided. It is located almost in the middle.

  Reference numeral 13 denotes a stationary ring that connects the top plate 5 and the peripheral side wall 6 with an upper edge. A drain port 14 is formed at the upper edge of the peripheral side wall 6, and rainwater that has fallen on the top plate 5 From the inclination of the plate 5, it flows down on the cover plate 10 via the drain port 14, and flows down from the periphery of the cover plate 10 to the ground.

In the above embodiment, the exhaust ports 9 and 9a are formed in two stages, but may be formed in three stages or more. In consideration of the exhaust resistance, two stages are optimal in order to make the opening area as large as possible.
The above-described air supply top 3 includes the upper end opening 17 of the top air supply pipe 16 that is vertically raised, and the upper end opening 17 that is on the upper end opening 17 and covers the upper end opening 17 and the upper end opening 17. A gap 18 is formed around the opening 17, and a downward-facing bowl-shaped top cover 15 is formed with an air inflow passage 19 formed inside.
The outer diameter of the cover plate 10 is larger than that of the top cover 15, so that rainwater flowing from the cover plate 10 does not fall on the top cover 15.

  In the above configuration, a spiral 20 is formed on the lower end side of the top exhaust pipe 11 of the exhaust top 2, as shown in FIG. 3, and this spiral 20 is located at the upper end of the exhaust pipe 104 in the air supply top 3. It is screwed into the spiral 21 formed in the section, and by adjusting the distance (height) between the exhaust top 2 and the air supply top 3 by this screwing amount, it can be adapted to the supply / exhaust conditions of the installation site. it can.

  In the case of the above embodiment, the exhaust (gas) discharged from the combustion device 100 ascends in the exhaust pipe 104 in the supply / exhaust pipe 101 as shown in FIG. 2 and FIG. 4 flows into the interior 4, collides with the top plate 5 with a rising momentum, makes a U-turn, descends along the peripheral side wall 6, and flows out from the exhaust port 9 a near the bottom plate 7 in a concentrated manner with the help of the flow velocity. The gas also flows out from the upper exhaust port 9.

  On the other hand, the combustion air enters the top air supply pipe 16 from the upper end opening 17 of the top air supply pipe 16 via the inflow passage 19 from the gap 18 of the air supply top 3, and then passes through the air supply pipe 105. Enter the combustion device 100.

Rain water at the time of rain flows down from the top plate 5 of the exhaust top 2 to the cover plate 10 through the drain port 14 and falls from the cover plate 10 to the ground.
Moreover, since the outside air temperature becomes zero degrees or less and the water vapor component in the exhaust gas cooled in contact with the top plate 5 and the peripheral side wall 6 is heated by the high heat of the exhaust, the top plate 5, the peripheral side wall 6 and the bottom plate 7 are heated. Do not drain.

Explanatory drawing of the example which attached the supply / exhaust top which concerns on this invention to the top of the double pipe type supply / exhaust pipe of FF type combustion equipment Perspective view of air supply / exhaust top Cross section of supply / exhaust top Exhaust top illustration A-A 'sectional view BB 'sectional view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Supply / exhaust top 2 Exhaust top 3 Supply top 4 Exhaust chamber 5 Top plate 6 Perimeter side wall 7 Bottom plate 8 Lower edge 9, 9a Exhaust port 10 Drain receptacle 11 Exhaust pipe 12 Upper end opening part 13 Fixed ring 14 Drain port 15 Top cover 16 Top air supply pipe 17 Upper end opening 18 Clearance 19 Air inflow passages 20, 21 Spiral

Claims (2)

The upper pipe opening is located at the position where the inner pipe side of the double pipe raised vertically is the top exhaust pipe and the outer pipe side is the top air supply pipe and protrudes above the upper end opening of the top air supply pipe. A top air supply / exhaust pipe having a configuration in which the part is located;
  Above the upper end opening of the top air supply pipe, the center is fixed to the top exhaust pipe, covers the upper end opening of the top air supply pipe, and the outer periphery and the outer periphery of the top air supply pipe An air inlet formed between the air inlet and the air supply surface, and a top cover having a downwardly saddle-like shape for taking combustion air into the top air supply pipe from the air inlet via the upper end opening of the top air supply pipe. With the top,
  The top plate of the exhaust chamber surrounded by the top plate, the peripheral side wall, and the bottom plate is formed in a cross-sectional mountain shape, and an exhaust port is formed around the lower portion of the peripheral side wall, and the top exhaust pipe is vertically raised. An exhaust top configured such that an upper end opening passes through the bottom plate and is positioned in the exhaust chamber;
  A cover plate having an umbrella-like spread located at a lower portion of the exhaust chamber of the exhaust top and having a central portion fixed to the top exhaust pipe;
  A vertical air supply / exhaust top for forced supply / exhaust combustion equipment. The vertical supply / exhaust top for forced supply / exhaust type combustion equipment according to claim 1, wherein an outer diameter of the cover plate is formed to be larger than an outer diameter of a top cover on a supply top side.

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