JPH037703Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a stove smoke exhaust system using a brick or concrete outdoor chimney suitable for cold regions.

(Prior art) The above outdoor chimneys in cold regions are also called collective chimneys.
Combustion gas for heating from various parts of the house is collected and discharged.

The chimneys of coal and kerosene stoves, which produce less smoke, are also used these days by simply connecting the flue to the above-mentioned outdoor chimney, eliminating the need for a vertical part of the chimney.

(Problem that the invention aims to solve) Recently, a mysterious phenomenon has been observed in which when exhaust air from a stove is vented into an outdoor chimney made of brick or concrete in cold regions, water accumulated in the outdoor chimney flows into the stove. It's out.

As a result of the research, we were able to elucidate the following. In other words, recently in cold regions, hot water floor heating using exhaust heat using the flue of a stove has become much more common, so the temperature inside an outdoor chimney made of brick or concrete drops and a large amount of dew condenses inside the chimney. arise. When this condensation occurs one after another and the bottom of the chimney becomes filled with ice, the condensed water then flows into the warm room.

The present inventor has endeavored to improve the thermal efficiency of the stove and lower the flue gas temperature, and this invention solves the above-mentioned problem of condensation inside the outdoor chimney that has arisen as a result.

(Means for solving the problem) This device is a device for discharging indoor stove exhaust air to a brick or concrete chimney built outdoors, and includes a flue that vertically rises through the side wall of the outdoor chimney. The metal chimney is extended higher than the top of the outdoor chimney by connecting the horizontal, bent, and vertical parts of the metal chimney tube, and the gap between the vertical part of the metal chimney and the top of the outdoor chimney is almost airtightly closed. The bent part is made by placing a metal cylinder with a closed end into a mold, applying hydraulic pressure inside to push out a closed cylindrical protrusion with a screw-like protrusion from the cylinder wall, and opening it. A stove smoke exhaust device using an outdoor chimney, characterized in that the above-mentioned horizontal part has an insertion port.

(Function) In this idea, a new metal chimney is inserted into the conventional outdoor chimney, and the gap between the top of the outdoor chimney and the metal chimney is closed with a lid, so the exhaust air from the stove comes into contact with the cold inner wall of the outdoor chimney and condenses. The air between the two chimneys, which is closed and cannot move, acts as an insulating layer between the cold outdoor chimney and the relatively warm metal chimney.

(Example) The drawing is an explanatory diagram of an example of this invention, in which H is a house, S is a stove inside, C is a conventional outdoor chimney, 1 is a metal chimney passed through the inside, 1a, 1
b and 1c are the horizontal part, bent part, and vertical part of the chimney metal tube, respectively, 2 is the lid at the top of the outdoor chimney, and 2a
Reference numeral 1 indicates a tightening band for airtightly attaching the lid 2 to the vertical part 1c of the metal cylinder, 3 indicates a smoke inlet conventionally provided through the side wall of an outdoor chimney C, and 4 indicates a conventional ash collection port. The metal cylinder horizontal part 1a has conventionally been used as the final part of an indoor flue, but in the case of this invention, it is not limited to the smoke inlet 3, but protrudes into the chimney C by an extra amount to be inserted and connected to the bent part 1b. The difference is that

In this embodiment, an H-shaped rain cover 1d is attached to the upper end of the vertical part 1c of the metal cylinder, and when installed, the lid 2 is placed at the required (designed) position of the vertical part 1, which is a specially made long smoke cylinder.
is fixed with the tightening band 2a, fit the bent part 1b into the lower end, and insert it from the upper end of the outdoor chimney C. When the lid 2 is fully covered with the upper end of the outdoor chimney C, the horizontal pipe insertion port of the bent part 1b is inserted. 5 should face the front of the smoke inlet 3.

If you look inside from the smoke inlet 3, you can see whether the insertion port 5 of the bent part 1b is in the correct position to fit in when the horizontal part 1a is inserted, so loosen the tightening band 2a at the top of the chimney C. After correcting the height and direction of the vertical portion 1c, tighten the band 2a again. Now insert the horizontal part 1a from the smoke inlet 3 and bend the bent part 1.
It can be pressed into the horizontal insertion port 5 of b. At this time, since the bent portion 1b escapes until it hits the inner wall of the outdoor chimney C, it is only necessary to push the horizontal portion 1a that much further and then pull it back by the length that the bent portion 1b returns to the center of the chimney. Alternatively, a spacing member may be attached to the bent portion 1b in advance to maintain a constant distance from the inner wall of the chimney C.

In this way, the tip of the metal cylinder horizontal part 1a becomes the bent part 1b.
Once connected, fix this to the smoke inlet 3 and connect the flue from the stove S to the indoor end.
Needless to say.

Note that the bent portion 1b of the metal tube is different from the "bend" of a general metal tube for a chimney, and is shown enlarged in FIGS. 2 and 3. This involves placing a metal cylinder with a closed end into a mold, applying hydraulic pressure inside to push out a closed cylindrical protrusion with thread-like protrusions 6 from the cylinder wall, and opening this to open a short horizontal pipe insertion port 5. That is.

The difficult conditions are that the bent part insertion port 5 cannot be made long because it is to be lowered through the narrow outdoor chimney C, and that it must be able to easily accept the tip of the horizontal part 1a that is inserted from indoors through the smoke entry port 3, and that it must be possible to connect airtightly. However, the bent portion 1b of this embodiment satisfies this requirement. It is also possible to push out a horizontal receptacle 5 having a diameter equal to the diameter of the vertical portion of the bent portion 1b.
The base portion 5a of the tube was successfully expanded to a larger diameter.

The lid 2, which airtightly closes the gap between the upper end of the outdoor chimney C and the vertical part 1c of the metal tube, and the metal tubes for the chimney can be made into double lids or double tubes to add an insulating air layer, depending on the implementation conditions. , changes in dimensions, etc. are left to the designer.

(Effects of the invention) This invention theoretically clarified the inexplicable phenomenon that when the exhaust air from a stove with excellent thermal efficiency is vented into an outdoor chimney in winter, the water accumulated in the chimney flows into the stove. clearly stated.

In other words, the stove smoke exhaust system of this invention passes through a conventional outdoor chimney with a metal tube connected to it, and closes the gap between the vertical part and the top of the outdoor chimney with a lid, so that the exhaust air does not come into contact with the outdoor chimney. In addition, since the air between the outdoor chimney and the vertical part of the metal cylinder is sealed by the lid, it acts as an insulating layer and keeps the outer periphery of the metal cylinder warm, so it can withstand severe cold temperatures of several tens of degrees below freezing. During the season, the phenomenon of condensation in flue gas can be completely eliminated.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of an embodiment of this invention, Figures 2 and 3
The figures are a front view and a side view of the bent portion of the metal tube. 1...metal chimney, 2...lid.

Claims (1)

[Scope of Claim for Utility Model Registration] A device for discharging indoor stove exhaust air into a brick or concrete chimney built outdoors, in which a chimney metal A metal chimney extending higher than the top of the outdoor chimney by connecting the horizontal, bent, and vertical parts of the pipe, and a lid that almost airtightly closes the gap between the vertical part of the metal chimney and the top of the outdoor chimney. The bent part is formed by placing a metal cylinder with a closed end into a mold, applying hydraulic pressure inside to push out a closed cylindrical protrusion with a screw-like protrusion from the cylinder wall, and opening it to form the horizontal part. A stove smoke exhaust device using an outdoor chimney, characterized in that the outlet is an outlet for a stove.