JPS598134Y2 - Air supply device for outdoor gas bath kettle - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air supply device for an outdoor gas bath kettle that prevents burner flame overflow and main burner and pilot burner from going out even in strong winds.

Conventional gas bath pots installed outdoors, so-called external-fired pots, have disadvantages in that during strong winds, wind pressure is applied to the burner section and the flame of the main burner is fanned, resulting in incomplete combustion, or the pilot burner goes out.

In order to prevent this, bafflers are not installed on the exhaust stack side or are insufficient, resulting in a similar phenomenon during strong winds.

This is because the velocity energy of the wind blowing against the walls of the building is converted into pressure energy, causing a rise in pressure, and air is forcibly introduced into the combustion chamber from the baffler or exhaust stack in this increased pressure area, causing combustion from the intake port. It has been found that the pressure in the combustion chamber that sucks the air for use temporarily becomes lower than the pressure energy converted from the wind, causing a pressure change that causes the main burner flame to overflow or the pilot burner to go out. ing.

The present invention makes use of the above-mentioned phenomenon, and even if the wind speed energy changes to pressure energy outside the pot and causes a pressure rise, the combustion chamber pressure changes accordingly, resulting in the well-known flame overflow phenomenon. The aim is to prevent combustion from burning out and to ensure complete combustion at all times.

The present invention will be explained below based on examples.

In the figure, 1 is the main body of the bathtub equipped with a heat exchanger 2 inside, and a combustion chamber 4 into which a burner 3 is inserted is integrally provided at the bottom of the main body, and a baffler 6 is provided at the top of the main body 1. A long exhaust pipe 5 is provided integrally.

In addition, there is a box-shaped bath pot cover C on the outer surface of the bath pot body 1.
Combustion air is once introduced into the bathtub cover C, and the combustion air inside the cover is sucked into the combustion chamber through an intake hole 7 formed at the bottom of the combustion chamber 4.

Therefore, the main body 1 is installed on the bathtub cover so that there is a space at the bottom of the combustion chamber 4.

As shown in detail in the drawing, this bath pot cover 10 includes a bottom plate 9 that has a drain hole 8 drilled therein and supports the bath pot body 1, and a cover that is fixed around the bottom plate and surrounds the four circumferences of the bath pot at required intervals. A side plate 10 and a top plate 11 fixed to the upper part of the cover side plate and covering the top surface of the bathtub are connected, and the bottom plate, the cover side plate, and the top plate form a box shape.

Also, an air supply hole 12 and an insertion hole 13 into which the exhaust tube 5 is inserted are bored in the top surface of the top plate 11, and the number of air supply holes 12 is one or more, so that sufficient air necessary for combustion can flow into the cover. The number and size of perforations are determined based on the type of perforation to be introduced.

Also, this top plate 11 is integrally provided with a cover top plate 14 having an insertion hole 15 larger than the outer diameter of the exhaust pipe at a required distance from the top plate. Outer plate 16 having an opening on the wall W side
are integrally provided, and this opening is used as an air supply port 17.

According to the present invention, the outer periphery of the bathtub is covered with a cover, and the combustion air is once introduced into the cover from the air supply port opened on the wall side of the cover and the outer periphery of the insertion hole into which the exhaust pipe is inserted. Since the air inside this cover is supplied to the combustion chamber of the bath pot from the bottom, even if pressure rises outside the bath pot during strong winds, this pressure will be absorbed through the cover and the combustion chamber will be inhaled. The air pressure on the intake side of the chamber and the wind pressure that enters the combustion chamber from the baffler exhaust stack cancel each other out, creating an equal pressure that prevents the flames of the main burner and pilot burner from overflowing, and ensures complete combustion without being extinguished. In addition to this, there is also the advantage that air can be supplied smoothly since the main air supply is carried out through the air supply port opened on the wall side and the outer periphery of the exhaust pipe.

[Brief explanation of the drawing]

FIG. 1 is an external view, FIG. 2 is a sectional view, and FIG. 3 is an external view as seen from the back. 1... Main body of the bath pot, 2... Heat exchanger, 3... Burner, 4... Combustion chamber, 5...
...Exhaust pipe, 6...Baffler, 7...
...Intake hole, 8...Drain hole, 9...
・Bottom plate, 10...Cover side plate, 11...
・Top plate, 12... Air supply hole, 13... Insertion hole, 14... Cover top plate, 15...
Exhaust pipe insertion hole, 16... Outer plate, 17...
・・Air supply port, C・・Bath pot cover, W・・・・
・Wall surface.

Claims (1)

[Scope of utility model registration request] A bath boiler cover is integrally provided on the outer periphery of the bath boiler at a required interval to provide a passage for combustion air, and the combustion chamber of the bath boiler is installed so that the combustion air for the bath boil is introduced from the bottom of the combustion chamber. In a gas bath boiler having an air inlet at the bottom, a top plate and a power bar top plate are provided at the top of the bath boiler cover at a required distance above the top plate, and a Form an exhaust pipe insertion hole with a diameter larger than the outside diameter of the exhaust pipe that can penetrate through the board and the upper cover plate, and cover the outer surface of the gap between the top plate and the cover upper plate with an outer plate, so that the wall side of the building is covered. An air supply device for an outdoor gas bathtub, which is opened to serve as an air supply port, and further has an air supply hole formed in the top plate to introduce air into the cover.