JP2793955B2 - Combustion device stack structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pipe structure of a combustion apparatus which can reduce an installation area.

[0002]

2. Description of the Related Art Noodle boilers, gas ovens, steamers, boiling disinfectors, and other kitchen appliances for business use, as well as water heaters, heaters, and other appliances that use heat use gas or kerosene as fuel. A combustion device is provided. This type of combustion device has an exhaust pipe that exhausts combustion gas and the like.However, if this exhaust pipe is too close to a wall of a building or the like, the wall may be burned or a fire may occur. It is said that it is preferable to install them at a separation distance. Generally, the wall is finished with a combustible material, a flame-retardant material or a quasi-noncombustible material, and the exhaust temperature is 260 ° C.
In the following combustion devices, the separation between the stack and the wall must be separated by at least the radius of the stack, and in other combustion devices (exhaust heat temperature exceeds 260 ° C.), the separation must be at least 150 mm. Stipulated.

[0003]

When a predetermined separation distance is provided between the exhaust stack and the wall, the protruding amount from the wall becomes large as a whole of various appliances incorporating the combustion device, and the surrounding area is opened. The space is narrowed (dead space is increased). In particular, if the appliance to be incorporated is a kitchen appliance such as a noodle boiler, the installation location is in a cooking room, which has many restrictions in terms of space and layout in relation to cooking work. However, the adverse effect (such as a decrease in work efficiency) on the cooking operation due to the narrowing of the space as described above was significant.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an exhaust pipe structure of a combustion apparatus capable of keeping the installation area small while ensuring fire safety. .

[0005]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention has an inner cylinder and an outer body provided outside the inner cylinder through a heat insulating material filling portion, and the air intake passage penetrates the inner cylinder and the outer body so as to communicate inside and outside. It is characterized in that a wind piece that closes a part of the upstream side of the opening on the inner cylinder side in the air intake path is provided.

The present invention also includes an inner cylinder, an outer body provided outside the inner cylinder via a heat-insulating material filling portion, and a wind cutter accommodated inside the inner cylinder. An air intake passage is formed so as to communicate between the inside and the outside of the exterior body, and an intake hole corresponding to the air intake passage is formed in the wind cutting cylinder. It is characterized in that a part is positioned so as to close a part on the upstream side of the opening in the air intake passage.

[0007] In the case of using the wind cutting cylinder, it is preferable to form a predetermined circumferential gap between the outer surface and the inner surface of the inner cylinder.

[0008]

According to the present invention, when exhaust gas such as combustion gas is generated inside the inner cylinder, air outside the exterior body is sucked into the inner cylinder through the air intake passage and mixed with the combustion gas. , The exhaust gas temperature is cooled. In the air intake passage, a part of the upstream side of the opening on the inner cylinder side is closed by a wind piece (claim 1) or an opening edge of an intake hole provided in the wind cut cylinder (claim 2). Therefore, the suction effect of the outside air is easily generated, and the combustion gas is not diffused from the air intake passage to the outside of the exterior body.

If a circumferential gap is formed between the inner cylinder and the wind cutting cylinder, the action of sucking outside air by the air intake passage is more likely to occur.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a side view showing the noodle boiler 1 embodying the present invention, and FIG. 3 is a front view of a main part (exhaust pipe 2) thereof.
Reference numeral 3 in FIG. 2 denotes a combustion device such as a gas burner.
FIG. 1 is an enlarged sectional side view of the exhaust pipe 2.

The exhaust tube 2 has a rectangular shape elongated in the width direction of the noodle boiler 1, and glass wool or the like is used outside the inner tube 4 formed of a stainless plate or the like. An exterior body 6 formed of a metal decorative board or the like is provided via the heat insulating material filling portion 5 that has been provided. As shown in FIG. 1, an air intake passage 7 is formed through an insulating material filling portion 5 so as to communicate the inside of the inner cylinder 4 and the outside of the exterior body 6. As shown in FIG. 3, a plurality of the air intake passages 7 are arranged side by side at predetermined intervals along the width direction of the exhaust pipe 2. In this embodiment, the diameter of the air intake path 7 is set to 30 mm.

A wind cutting cylinder 8 is housed inside the inner cylinder 4. The wind cutter 8 is held in a state of being supported by a tongue-shaped or annular bracket 9 attached to the inner cylinder 4, and has an outer peripheral surface of the wind cutter 8 and an inner peripheral surface of the inner cylinder 4. Between them, a circumferential gap 10 is formed. In the present embodiment, the circumferential gap 10 is set to 5 mm. Wind cutter 8
, An intake hole 11 is formed so as to correspond one-to-one to the air intake path 7. Each of the air intake holes 11 has the same diameter as the air intake passage 7, and the opening edge of the air intake passage 7 closes a part of the upstream side (the lower side in FIG. 1) of the air intake passage 7. It is arranged so as to be displaced from the intake path 7 (see FIG. 3).
reference).

In FIG. 2, 12 is a boiling tank, 13 is a lid, 14 is an operation unit, and 15 is an exhaust port cover. In the exhaust pipe 2 of the present invention thus configured, when the exhaust gas flow of the combustion gas occurs in the inner cylinder 4 (wind cutting cylinder 8), the air outside the exterior body 6 is generated by the exhaust gas. The liquid is sucked into the inner cylinder 4 through the intake path 7. Most of the sucked air is introduced into the wind cutter 8 through the intake hole 11 and is mixed with the combustion gas to cool the exhaust gas. A part of the suction air flows into the circumferential gap 10 between the wind cutting cylinder 8 and the inner cylinder 4, and the inside of the circumferential gap 10 serves as a buffer zone between the exhaust gas temperature and the outside air temperature. Since the intake hole 11 is displaced from the air intake passage 7 and closes a part of the upstream side (lower side in FIG. 1), the combustion gas flows through the inner cylinder 4 (wind cutting cylinder 8). At the starting point, the combustion gas is not diffused from the air intake path 7 to the outside of the exterior body 6.

When the present invention is applied to the combustion device 3 in which the exhaust gas temperature rises to about 270 ° C., the exhaust gas temperature becomes 200 ° C.
It was cooled below, and it was confirmed that the surface temperature of the exterior body 6 became 100 ° C. or less. In this case, the exhaust pipe 2 can be brought into contact with the wall 16 even if the provisional command and the wall 16 are finished with a combustible material, a flame-retardant material, or a quasi-noncombustible material. However, in this embodiment, in order to ensure thorough fire protection, an appropriate number of spacers 17 are attached to the back surface of the exhaust pipe 2 as shown in FIG.
A minute gap is maintained.

In the present invention, the provision of the wind-cutting cylinder 8 shown in the above embodiment is not limited, and is not shown, but the opening of the air intake passage 7 on the side of the inner cylinder 4 is provided. Alternatively, a tongue-shaped or strip-shaped wind piece may be provided so as to close a part of the upstream side. The exhaust pipe 2 is not limited to a flat rectangular shape, but may be a square or round shape. Needless to say, there is no limitation on the devices to which the combustion device 3 is to be incorporated. However, the number and locations of the exhaust tubes 2 are not limited to these devices. Various modes as shown in each figure of FIG. 4 can be adopted.

[0016]

According to the present invention, there is provided the above-mentioned structure, in which the inside and outside of the inner cylinder and the outer body are communicated to form an air intake passage, and the inner cylinder side of the air intake passage is formed. The upstream part of the opening is closed by the wind piece (Claim 1) or the opening edge (Claim 2) of the intake hole formed in the wind cut cylinder. When the exhaust gas flow such as the combustion gas occurs in the cylinder, the air outside the exterior body is sucked into the inner cylinder through the air intake path, and the exhaust gas temperature is cooled. Therefore, various instruments can be installed in a state where the exhaust pipe is in contact with or close to a wall of a building or the like, and the surrounding space can be effectively used. In particular, when the present invention is applied to a kitchen appliance such as a noodle boiler, there is no possibility that the working efficiency in the kitchen is deteriorated, and the practical effect is large.

When a predetermined circumferential gap is formed between the inner cylinder and the wind cutter, the action of sucking outside air by the air intake passage is more likely to occur.

[Brief description of the drawings]

FIG. 1 is an enlarged side sectional view showing an embodiment of the present invention.

FIG. 2 is a side view showing a noodle boiler embodying the present invention.

FIG. 3 is a front view of a main part (exhaust pipe) of FIG. 2;

FIG. 4 is a schematic plan view showing a modified example of the number of exhaust pipes to be provided, their attachment locations, and the state of installation of instruments.

[Explanation of symbols]

 Reference Signs List 2 Exhaust tube 3 Combustion device 4 Inner tube 5 Heat-insulating material filling section 6 Outer body 7 Air intake path 8 Wind cutter 10 Peripheral gap 11 Intake hole

Claims (3)

(57) [Claims] 1. An inner cylinder and an outer body provided outside the inner cylinder through a heat insulating material filling portion, and an air intake passage is formed so as to communicate between the inner cylinder and the outer body. An exhaust pipe structure for a combustion device, wherein a wind piece that closes a part of the upstream side of the opening on the inner cylinder side of the air intake path is provided. 2. An inner cylinder, an outer body provided outside the inner cylinder via a heat-insulating material filling portion, and a wind cutter housed inside the inner cylinder. An air intake passage is formed so as to communicate between the inside and the outside, and an intake hole corresponding to the air intake passage is formed in the wind cutting cylinder, and the intake hole has a part of an opening edge thereof. An exhaust cylinder structure of a combustion device, characterized in that it is positioned so as to close a part of an upstream side of an opening in an air intake passage. 3. A predetermined circumferential gap is formed between the inner surface of the inner cylinder and the outer surface of the wind cutter.
The described exhaust stack structure.