JPS6021633Y2 - Combustion equipment supply and exhaust pipes - Google Patents

Description

[Detailed description of the invention] This invention relates to an air supply and exhaust pipe for a combustion appliance such as an outdoor water heater.

For combustion appliances such as outdoor water heaters, be sure to take precautions to prevent poor combustion due to wind pressure building up at the exhaust stack opening during strong winds.
As shown in FIG. 4, a gap a'' is usually provided between the front edge of the partition plate 8'' of the air supply/exhaust cylinder 1'' and the inner surface of the front wall 2'' as a place for the wind pressure to escape. When the burner is initially cold, exhaust gas flows around from the gap a'' to the air supply side, and this phenomenon is particularly noticeable when a gas with a strong lift property is used.

Therefore, this invention improves safety by preventing the exhaust gas from going around due to such a lift, and one embodiment thereof will be described below with reference to the drawings.

In the drawing, reference numeral 1 denotes an air supply/exhaust cylinder of a combustion appliance A, and an upward exhaust hole 10 is formed on the entire circumference of the upper wall of the upper exhaust cylinder part 1a. A plurality of horizontal exhaust holes 6 are formed, but these horizontal exhaust holes 6 are not formed in the front wall 2.

Reference numeral 3 denotes a projecting plate provided approximately horizontally and protruding inward at the center of the inner surface of the front wall 2, which is not located in the horizontal exhaust hole 6, and allows the exhaust to pass through the gap a described later and go around to the air supply side at the bottom. This is to prevent it from getting in.

7 is an air supply hole bored in the lower supply cylinder part 1b of the supply/exhaust cylinder 1;
Reference numeral 8 indicates an upper exhaust cylinder part 1a and a lower supply cylinder part 1 of the supply/exhaust cylinder 1.
A certain gap a is provided between the partition plate b and the front wall 2 of the air supply/exhaust cylinder 1 as a place for wind pressure to escape during strong winds.

Therefore, when there is wind, the wind that enters through the upward exhaust hole 10 or the sideways exhaust hole 6 is released through the air supply hole 7 bored in the peripheral wall of the lower feed cylinder section 1b or the sideways exhaust hole 6 on the leeward side, and the exhaust gas is discharged. I try not to suppress it.

9 is an exhaust hole, and B is a wall of the installation part.

Since this device has the above-mentioned structure, in normal combustion, the exhaust gas is mainly discharged upward from the upward exhaust hole 10, and since the upward exhaust hole 10 is sufficiently separated from the air supply hole 7, the exhaust gas does not mix with the air supply air. In addition, since the wind pressure generated near the opening of the exhaust stack 9 during strong winds escapes through the gap a, the exhaust is not suppressed and combustion defects are not caused.
Even in normal situations, the exhaust air is sucked in from the air supply hole 7 and tries to go around the air supply side through the gap a, which is prevented by the veneer 3 and is reduced, even when using gas with high lift properties. The phenomenon that exhaust gas flows into the air supply side, which tends to occur in the early stages of ignition, does not occur at all and is safe.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of this invention, Fig. 2 is a longitudinal side view, Fig. 3 is a partially cutaway plan view, and Fig. 4 is a partially cutaway side view of a conventional example. . 1... Supply and exhaust outer cylinder, 1a... Upper exhaust cylinder part, 1b... Lower supply cylinder part, 2...
Front wall, a... Gap, 3... Projection, 8
...Partition plate, 10...Exhaust hole.

Claims (1)

[Scope of utility model registration request] Exhaust holes 10 are formed in the upper wall of the upper exhaust cylinder part 1a of the supply and exhaust outer cylinder 1.
and the upper exhaust cylinder part 1a and the lower feed cylinder part 1b.
A gap a is provided between the front edge of the partition plate 8 that partitions the air supply and exhaust cylinder 1 and the front wall 2 of the air supply/exhaust cylinder 1 as a place for wind pressure to escape during strong winds. An air supply/exhaust pipe for a combustion appliance, characterized in that a projecting plate 3 is provided at the center of the inner surface to protrude substantially horizontally inward to prevent exhaust gas from going around from the gap a to the air supply side.