JPH0518601Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to an intake and exhaust device for oil stoves and other combustion devices.

(Prior Art) Conventionally, an air supply/exhaust pipe top is known in which an inner cylinder is used as an exhaust passage and an air supply passage is formed between an outer cylinder surrounding the inner cylinder and an inner cylinder.

(Problem to be solved by the invention) However, the top of such a supply/exhaust pipe is heat resistant and is made of a material such as a stainless steel plate to prevent wasteful heat from being radiated from the top of the pipe. Contained water vapor tends to condense near the exhaust outlet, and if this gets influenced by wind and wraps around the air supply port, it will freeze in cold regions and block the air supply port, causing problems. There is a problem of insufficient combustion resulting in incomplete combustion. Therefore, as seen in Japanese Utility Model Application Laid-Open No. 54-179547, a device is known in which an electric heater is provided near the air supply port to solve this problem. However, this requires wiring to supply electricity to the electric heater at the air supply/exhaust top that protrudes outdoors, and this wiring requires safety measures, making the construction work cumbersome.

The purpose of the present invention is to provide an air supply and exhaust pipe top that eliminates such problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention uses the inside of the inner cylinder as an exhaust passage, and forms an air supply passage between the outer cylinder and the inner cylinder that surround the inner cylinder. In the top of the supply/exhaust pipe, a portion near the air supply port connected to the air supply path of the supply/exhaust top and a portion extending over a part of the exhaust path is made of a good thermal conductor.

(Function) In this case, a part of the exhaust heat is transmitted to the vicinity of the air supply port by the part made of the thermally good conductor,
The air supply port is heated, thereby preventing freezing in the vicinity of the air supply port as much as possible.

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawing, 1 is a kerosene stove or other combustor, and 2 is the top of the air supply and exhaust pipe connected to the air supply passage (not shown) and exhaust passage (not shown) of the combustor 1 via an air supply pipe 3a and an exhaust pipe 3b. As shown in FIGS. 1 and 2, the supply/exhaust pipe top 2 has an exhaust passage 5 in the inner cylinder 4, and an air supply passage 7 between the outer cylinder 6 surrounding the inner cylinder 4 and the inner cylinder 4. It forms.

The configuration up to now is not particularly different from what is conventionally known.

In the present invention, a portion 9 in the vicinity of the air supply port 8 connected to the air supply path 7 and a part of the exhaust path 5 is constructed of a thermally good conductor 10, which is illustrated in the figure. To explain this in more detail, in the embodiment shown in FIG.
is inserted, the distal end side of the inner cylinder 4 is expanded outward, and is tied to the inner surface of the outer cylinder 6, thereby closing the distal end side of the air supply passage 7 formed between the inner and outer cylinders 4 and 6, and closing the inner cylinder. A portion that closes the tip of the tube 4 with a lid 11 to form an exhaust port 12 on the lid 11 and the tip side of the outer tube 6, and forms an air supply path 7 between the outer tube 6 and the inner tube 4. The inner and outer cylinders 4 and 6 are configured with an air supply port 8 on the distal end side, and the distal end sides 4a and 6a of the inner and outer cylinders 4 and 6 are made of a thermally good conductor 10 such as copper and aluminum. The root side thereof is screwed and connected to the tips of the inner and outer cylinders 4b, 6b on the root side forming the supply/discharge cylinder top body 2a.

In this case, the inner cylinder 4a is connected to the outer cylinder 6a by the inner punch 13 punched out when forming the exhaust port 12.
A portion of the inner cylinder 4a is bent inward to lock the front end of the inner cylinder 4a, and the parts are joined together by spot welding or other means.

The lid 11 provided at the tip of the outer cylinder 6a is made of a stainless steel plate like the conventional one, and its periphery is connected to the outer cylinder 6a.
It was caulked at the tip.

In the case shown in FIG. 2, the inner tube 4 is inserted into the outer tube 6 with the tip left inside, and the tip side of the inner tube 4 is expanded outward, as in the case shown in FIG. 1. The lid 1 is attached to the inner surface to close the tip side of the air supply path 7 formed between the inner and outer tubes 4 and 6, and closes the tip of the inner tube 4 with the lid 11.
1 and an exhaust port 12 is formed on the distal end side of the outer cylinder 6, and an air supply port 8 is provided on the distal end side of the portion of the outer cylinder 6 that forms the air supply path 7 between it and the inner cylinder 4. , only the distal end 6a of the outer cylinder 6 is formed of copper or other thermally conductive material 10, and the distal end portion of the inner cylinder 4a made of a stainless steel plate is integrally assembled thereto as in the past, and the root of the inner cylinder 4a is The distal end side of the inner cylinder 4b can be freely inserted and removed, and the root of the outer cylinder 6a is screwed and connected to the distal end side of the outer cylinder 6b.

(Effects of the invention) According to the present invention, the heat contained in the exhaust gas can be absorbed by a very simple structure in which the vicinity of the air supply port connected to the air supply path and a part of the exhaust path are made of a good thermal conductor. This can be used effectively to raise the temperature near the air supply port, thereby preventing freezing in the vicinity of the air supply port and resulting in poor air supply, and eliminating the need for electrical wiring, etc. for installation as in the conventional example. This has the effect of simplifying the installation work compared to the conventional example.

[Brief explanation of the drawing]

Fig. 1 is a half-cut side view of an example of the implementation of the present invention;
FIG. 2 is a half-cut side view of another embodiment, and FIG. 3 is a side view showing the state of use. 2... Supply and exhaust pipe top, 4... Inner cylinder, 6... Outer cylinder, 8... Air supply port, 10... Good thermal conductor, 12...
exhaust port.

Claims (1)

[Scope of utility model registration request] In an air supply/exhaust top in which the inside of the inner cylinder is an exhaust passage and an air supply passage is formed between an outer cylinder surrounding the inner cylinder and an air supply passage, there is a A supply/exhaust top device consisting of a part of the exhaust path made of a good thermal conductor.