JPS6215628Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a supply/exhaust top for forced supply/exhaust combustion appliances such as gas water heaters and gas bath pots.

The exhaust pipe is arranged concentrically with the air supply pipe, and the tip of the exhaust pipe protrudes beyond the tip of the intake pipe to prevent combustion exhaust gas from entering the air supply and stabilize combustion. , and as a rain countermeasure, it has already been proposed to arrange these pipes in a downward sloping direction towards the tip, but simply tilting the supply and exhaust pipes will not work.
In particular, when it rains with strong winds, rainwater enters into the air supply/exhaust top to a great extent, causing the problem that it leaks into the room from the joints of the air supply/exhaust tube, or even enters the appliance.

Therefore, this idea improves combustion performance by providing a cylindrical rainproof ring between the supply and exhaust pipes at the tip of the supply and exhaust pipes and inside the exhaust pipes to prevent rainwater from entering the top. To provide an air supply/exhaust top for a forced air supply/exhaust type combustion appliance without any damage and without affecting the basic performance of the air supply/exhaust top.

Hereinafter, one embodiment will be described in detail based on the drawings. In the drawings, 1 is an air supply pipe, and an exhaust pipe 2 is arranged concentrically inside the air supply pipe to form a double pipe structure air supply and exhaust pipe, By making the tip 3 of the exhaust pipe 2 protrude from the tip 4 of the air supply pipe 1 to prevent combustion exhaust gas from entering the air supply, and by penetrating the roof wall A and sloping downward in the direction of the tip. Efforts are being made to quickly remove intruding rainwater. In addition, when installing it, the tip 4 of the air supply pipe 1 is positioned approximately on the same plane as the outer surface of the roof wall A, and only the tip 3 of the exhaust pipe 2 is made to protrude from the outer surface of the roof wall A by a certain amount. The wind pressure zone generated along the outer surface of the roof wall A ensures air supply even when there is a headwind in any direction, and the air supply and exhaust is performed smoothly and reliably. 5 is between the air supply pipe 1 and the exhaust pipe 2 at the tip of the air supply and exhaust pipe, that is,
A cylindrical rainproof ring extending in the axial direction is provided at the open end 6a of the air supply passage 6, and 7 is inside the exhaust pipe 2 at the tip of the air supply and exhaust pipe, that is, at the open end of the exhaust passage 8. It is a cylindrical rainproof ring with a large width dimension extending in the axial direction provided in the portion 8a, and both rainproof rings 5 and 7 are connected to the tip portions 4 and 3 of the supply and exhaust pipes via spacers 9 and 10, respectively. The concentric fixation prevents rainwater from entering directly into the supply and exhaust top. The lengths of the rainproof rings 5 and 7 are set so that fine water droplets that scatter and enter due to strong headwinds can all adhere to these surfaces, allowing the attached water droplets to coagulate and flow down to the respective opening ends (opening ends 6a, 6a, 7b). 8a) so that it can be removed dropwise.

As explained above, this idea has a simple structure in which a cylindrical rainproof ring is provided between the air supply and exhaust pipes at the tip of the supply and exhaust pipes, and inside the exhaust pipes. Because it effectively prevents rainwater from entering the room, it eliminates corrosion and damage to the equipment or water leakage into the room caused by rainwater infiltration, and does not affect the basic performance of the air supply/exhaust top in any way. Since there is no fuel, it has the effect of always providing stable combustion, and since the structure is extremely simple, it is easy to manufacture and can be provided at a low price.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the air supply/exhaust top of the forced air supply/exhaust type combustion appliance of this invention, and FIG. 2 is a front view of only the main parts. 1... Air supply pipe, 2... Exhaust pipe, 3... Tip of exhaust pipe, 4... Tip of air supply pipe, 5, 7... Rainproof ring.

Claims (1)

[Scope of utility model registration request] In a system in which a double pipe structure air supply/exhaust pipe is arranged so as to be inclined downward in the distal direction, and the distal end 3 of the exhaust pipe 2 is provided to protrude from the distal end 4 of the air supply/exhaust pipe 1, the distal end of the air supply/exhaust pipe is An air supply/exhaust top for a forced air supply/exhaust type combustion appliance, characterized in that cylindrical rainproof rings 5, 7 with a large width are provided between an air supply pipe 1 and an exhaust pipe 2 and inside the exhaust pipe.