JPH087228Y2 - Air supply / exhaust device for combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an airtight structure of an indoor end of a supply / exhaust cylinder of a simultaneous supply / exhaust combustion apparatus.

[Conventional technology]

FIG. 3 is a cross-sectional view of the main part showing the state of arrangement of this type of combustion device inside a room. In the figure, (A) is the main body of the combustor placed on the floor surface (B), and (C) is the outer wall Air supply / exhaust pipe inserted in (D), (E) is a combustor body (A) and air supply / exhaust pipe (C)
(F) is an exhaust hose which communicates with and.

FIG. 4 is a sectional view showing a conventional air supply / exhaust device,
(1) is an exhaust pipe connected to the exhaust hose (F) through an exhaust joint (2), the protruding end to the outside is communicated with the exhaust port (1a), and the indoor opening is the end cover (1b). ) Is blocked. Reference numeral (3) is an air supply pipe in which the exhaust pipe (1) is concentrically installed, and is connected to the air supply hose (E) through an air supply joint (4). The supply port (3a) is opened, and the indoor side opening on the opposite side is closed by an annular end cover (3b). In addition, (5) in the figure is a closing lid at the outdoor end of the exhaust pipe (1).

[Problems to be solved by the invention]

Since the conventional air supply / exhaust device is configured as described above, when a gap is created between the end cover (1b) and the exhaust pipe due to, for example, variations in the press-fitting margin, exhaust gas directly enters the room. There was a danger of doing it. An object of the present invention is to prevent mixing of air supply and exhaust and leakage of exhaust into the room by a simple means.

[Means for solving problems]

The present invention relates to a supply / exhaust device for a combustion device, which has an exhaust pipe (1) for guiding exhaust gas from an indoor space to an outdoor space, and an air supply pipe (3) having the exhaust pipe (1) installed therein for guiding air supply from the outdoor space to the indoor space At the end cover (1) having a portion along the inner wall of the exhaust pipe (1) and closing the indoor side end of the exhaust pipe (1)
b) a closed portion (1c), and a portion of the air supply pipe (3) that has the closed portion (1c) on the indoor side and has a portion along the outer wall at the indoor end of the exhaust pipe (1) An end cover (3b) for closing the inner end is provided.

[Action]

In this device, the exhaust gas becomes hot and the exhaust pipe (1)
Even if expansion and contraction occur, the end caps (1b) (3b) along the inner wall and the outer wall of the exhaust pipe (1) regulate expansion and contraction at the indoor side end of the exhaust pipe (1), Prevents mixing between air supply and exhaust. In addition, the closing portion (1c) provided with the end cover (1b) for closing the indoor side end of the exhaust pipe (1) is covered further by the end cover (3b) for closing the air supply pipe (3) on the indoor side. Even if an exhaust gas leak occurs at the closed part (1c), the end cover (3b) prevents the exhaust gas from leaking into the room.

〔Example〕

An embodiment of the present invention will be described below. That is, FIG. 1 is a cross-sectional view showing an embodiment of the air supply / exhaust device in the combustion device of the present invention. The same parts as those in FIGS. 3 and 4 are designated by the same reference numerals and their duplicate description is omitted. However, in the case of this invention, the end cover (3b) that closes the indoor side opening of the air supply pipe (3) has the indoor side opening of the exhaust pipe (1) as shown in the partially enlarged view of FIG. The end cover (1b) for closing the exhaust gas is so configured as to be double-closed against exhaust gas leakage so as to further close the closing portion (1c) by the end cover (1b). It is characterized by points.

In the above configuration, when operating the main body of the combustor (A), the outside air is taken in through the air supply port (3a) as shown in FIG. 1 and supplied into the main body of the combustor (A) as shown by the solid line arrow
The burned exhaust gas flows as shown by the dotted arrow in the figure and is discharged to the outside through the exhaust port (1a). In this way, safe operation is performed with the intake air flow and exhaust air flow completely isolated. However, even if the exhaust gas leaks from the above-mentioned block (1c), there is an end cover (3b) on the outside of this block, so even in the worst case, the leaked exhaust gas will not be supplied to the intake pipe. It only diffuses into (3).

[Effect of device]

In this device, the exhaust gas becomes hot and the exhaust pipe (1)
Even if expansion and contraction occur, the end caps (1b) (3b) along the inner wall and the outer wall of the exhaust pipe (1) regulate expansion and contraction at the indoor side end of the exhaust pipe (1), The air supply pipe (3) is provided with a closing portion (1c) provided with an end cover (1b) that can prevent mixing between the supply air and the exhaust air and close the indoor side end of the exhaust pipe (1). Since the end cover (3b) that closes the cover is further covered inside the room, even if an exhaust gas leak occurs at the closed part (1c), the end cover (3b) prevents the exhaust gas from leaking into the room. . Therefore, there is an effect that the mixture of the supply air and the exhaust gas and the leakage of the exhaust gas into the room can be prevented by a simple means.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a main part showing a supply / exhaust device of a combustion apparatus of the present invention, FIG. 2 is a partially enlarged sectional view of the same, and FIG. FIG. 4 is a vertical sectional view of a main part showing a conventional air supply / exhaust device. In the figure, (1) is an exhaust pipe, (1b) is an end cover, (1c) is a closed portion, (3) is an air supply pipe, (3b) is an end cover, and (A) is a combustor body. In other figures, the same reference numerals indicate the same parts.

Claims (1)

[Scope of utility model registration request] 1. A supply / exhaust of a combustion device having an exhaust pipe (1) for guiding exhaust gas from the room to the outside, and an air supply pipe (3) having the exhaust pipe (1) installed therein for guiding air supply from the room to the room. In the device, an end cover (1) having a portion along the inner wall of the exhaust pipe (1) and closing the indoor end of the exhaust pipe (1)
b) a closed portion (1c), and a portion of the air supply pipe (3) that has the closed portion (1c) on the indoor side and has a portion along the outer wall at the indoor end of the exhaust pipe (1) A supply / exhaust device for a combustion device, comprising: an end cover (3b) for closing an inner end.