JPH0816532B2 - Radiant heating device for cooking - Google Patents

Description

TECHNICAL FIELD The present invention relates to a radiant heating device for cooking which is applied to an oven, a grill, a defroster or the like.

[Conventional technology]

Conventionally, in a radiant heating device for cooking, a flat radiant panel is arranged at the upper part, the lower part, or the side part of the accommodation space of the object to be heated, and the combustion gas is made to flow in the radiant panel. As a result, heat is radiated from the surface of the radiant panel toward the object-to-be-heated accommodation space (a document cannot be shown).

[Problems to be solved by the invention]

However, in the field of cooking, it is one of the important issues to uniformly heat the object to be heated over the entire surface in terms of heat treatment quality, as well as in terms of heat treatment efficiency, but with the conventional configuration, Since the heat radiation direction to the object to be heated is limited to the specific direction (direction orthogonal to the plate surface of the flat panel radiation panel), there is a problem that the heating to the object to be heated is biased.

Also, in order to improve the uniform heating property, it was considered to disperse the flat radiant panels in the upper part, the lower part, and both sides of the object storage space. It is difficult to adjust the supply amount and the supply combustion gas temperature separately to maintain the surface temperature of each radiation panel at the same temperature, and although uniform heating is improved to some extent, the surface temperature of each radiation panel Due to the difference, there was still a considerable deviation in the heating of the object to be heated.

An object of the present invention is to effectively improve the uniform heating property for an object to be heated by a rational configuration that deviates from the conventional idea of disposing the radiation panel in the accommodation space for the object to be heated. .

[Means for solving problems]

The radiant heating apparatus for cooking according to the present invention is characterized in that a cylindrical heat radiating body having a cylindrical hole as a space for accommodating an object to be heated is surrounded by an outer cylindrical body, and combustion gas from a burner is forcedly blown by a fan. A combustion gas passage is formed between the tubular heat radiator and the outer tubular body so as to flow in the circumferential direction of the tubular heat radiator almost all around and in one circumferential direction. , Its action and effect are as follows.

[Work]

That is, in the combustion gas path between the tubular heat radiator and the outer tubular body surrounding it, the combustion gas flows in the circumferential direction of the tubular heat radiator over substantially the entire circumference and in one circumferential direction. As a result, the tubular heat radiator is uniformly heated over substantially the entire circumference thereof.

Then, from the uniformly heated cylindrical heat radiation body, heat rays are uniformly radiated from almost the entire circumference thereof toward the inward object storage space.

By the way, in order to radiate heat inward from the entire circumference of the tubular heat radiating body, as shown in FIG. 5, the tubular heat radiating body (2) and the outer tubular body (5) are heated by the cylindrical heat radiating body. The combustion gas path extending over substantially the entire circumference of the radiator (2) is divided into half circumferences in which the combustion gas flow directions in the circumferential direction are opposite to each other, and burner ( It is also conceivable to heat the tubular heat radiator (2) over almost the entire circumference by supplying the combustion gas from 3) separately or in a state of diverging in a bifurcated manner. By adjusting the combustion gas supply amount ratio (shunt ratio) to the combustion gas paths (Fa) and (Fb), the surface temperature of the cylindrical heat radiator (2) on one side half and the other side half circumference is the same. It is difficult to adjust and maintain, and due to the difference in the surface temperature, from one side half circumference and the other side half circumference Unlike the heat radiation state of the were those results.

In that respect, according to the configuration of the present invention, since the combustion gas is caused to flow in one direction in the circumferential direction of the tubular heat radiator over substantially the entire circumference, it is not necessary to adjust the supply amount ratio to a plurality of combustion gas passages. It is possible to heat exactly the same amount of combustion gas over the entire circumference of the tubular heat radiator, which makes the surface temperature of the tubular heat radiator uniform in the circumferential direction.
That is, uniformization of heat radiation from almost the entire circumference of the tubular heat radiator toward the inside is extremely effectively and easily achieved.

〔The invention's effect〕

As a result, the heat radiation is applied extremely uniformly over the entire circumference of the object to be heated located inside the cylindrical hole (accommodation space) of the cylindrical heat radiator, so that the uniform heating property for the object to be heated is Compared to the above, the heat treatment quality of the cooked food can be improved and the cooking efficiency can be improved.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3, the casing (1)
The cylindrical heat radiating body (2) is installed inside, and the heat radiating body (2)
The inside of the cylindrical hole of is the accommodation space for the object to be heated (A), and
A fan (4) for supplying the high temperature combustion gas from the burner (3) to the outer peripheral portion of the heat radiation body (2) is provided, and thus the heat radiation body (2) is heated by the high temperature combustion gas to heat the heat radiation body (2). ), A radiant heating device for cooking that heat-treats the object to be heated (A) by radiating heat inward from the inner peripheral surface.

As a heating configuration for the heat radiator (2), an outer cylindrical body (5) that concentrically surrounds the cylindrical heat radiator (2) is provided, and the heat radiator (2) and the outer cylindrical body (5) are provided. ), A combustion gas passage (F) that causes the combustion gas to flow in the circumferential direction of the heat radiating body (2) over the entire circumference thereof and in one circumferential direction by the forced ventilation of the fan (4). Has been formed.

Further, a guide (6) for transferring the combustion gas flowing in the circumferential direction of the heat radiating body (2) in the cylinder axis direction of the heat radiating body (2) along with the flow is provided with the heat radiating body (2) and the outer cylindrical body. It is provided between (5) and the combustion gas passage (F) for flowing the combustion gas over the entire circumference of the heat radiating body (2), and is formed in a spiral passage continuous in the cylinder axis direction.

That is, the high temperature combustion gas flowing in the spiral combustion gas path (F) uniformly heats the heat radiator (2) over its entire circumference and the entire length in the cylinder axis direction, and the inner surface of the heat radiator (2) is heated. The heat is radiated uniformly from the entire surface of the inside.

Far-infrared radiation paint is applied to the inner peripheral surface of the heat radiator (2), and far infrared rays are emitted as heat radiation from the inner peripheral surface of the heat radiator (2) to the object to be heated (A). It is designed to enhance the heating effect.

In the figure, (7) is a perforated plate on which the object (A) to be heated is placed, and the heat radiation from the bottom is the perforated plate (7).
The object to be heated (A) is irradiated through the holes of the.

On one end side in the cylinder axis direction, a slit-shaped combustion gas supply port (8) extending in the cylinder axis direction is formed in a part of the outer cylindrical body (5) in the circumferential direction, and the combustion gas supply port is also formed. A hood (9) for guiding the combustion gas from the burner (3) to the (8) is connected from the outer cylindrical body (5).

Then, in the space surrounded by the hood (9), an elongated burner (3) in which flame holes (3a) are arranged side by side in a row, and a cross flow fan (4) are arranged such that their longitudinal direction is the cylinder axis direction. The combustion gas supply port is provided in a state in which the combustion gas generated by the burner (3) is mixed with the external air taken in through the opening of the hood (9) by the forced ventilation of the fan (4). The discharge gas is supplied from (8) to the combustion gas path (F).

Further, the slender burner (3) and the cross flow fan (4) are arranged in a posture along the cylinder axis direction to achieve a compact overall structure.

In the figure, (10) is the outer cylindrical body (5) at the other end in the cylinder axis direction.
Combustion gas reaching the end of the spiral combustion gas path (F) is exhausted from this exhaust stack (10).

(11) is the fuel gas supply path to the burner (3), (1
2) is a solenoid valve for intermittently supplying the fuel gas, (13) is a proportional valve for adjusting the fuel gas supply amount, (14) is a spark plug for the burner (3), and (15) is a drive for the cross flow fan (4). A motor, and (16) is a controller for controlling the valves, the spark plug, and the motor.

The radiant temperature of the object to be heated (A) is adjusted by adjusting the fuel supply amount to the burner (3) and the fan (4).
This is done by adjusting the amount of air by controlling the number of revolutions.

A heat insulating material layer (17) such as asbestos is provided between the outer tubular body (5) and the casing (1).

An opening / closing door is provided at one end of the object-to-be-heated (A) accommodation space, and the other end is closed.

[Another embodiment]

 Next, another embodiment of the present invention will be described.

The cross-sectional shape of the cylindrical heat radiating body (2) having the inside of the cylindrical hole as the accommodation space for the object to be heated (A) may be circular or elliptical, or may be rectangular as shown in FIG. The heat radiation body (2) may be installed vertically.

Instead of forming the combustion gas passage (F) for causing the combustion gas to flow in the circumferential direction of the tubular heat radiator (2) into a spiral passage continuous in the cylinder axis direction as in the above-described embodiment, the tubular heat radiator ( 2)
The path may be formed so as to make only one round.

Various types can be applied to the burner (3) and the fan (4), and the specific equipment configuration of the burner (3) and the fan (4) and the combustion gas path (F).
The combustion gas supply air passage configuration can be changed in various ways.

Instead of supplying the combustion gas to the combustion gas path (F) in a mixed state with the external air, only the combustion gas may be supplied to the combustion gas path (F).

Various materials such as ceramics and metals can be applied to the material of the tubular heat radiator (2) and the outer tubular body (5), and far infrared rays can be applied to the inner peripheral surface of the tubular heat radiator (2). It is also optional to form various coatings such as radiation paint.

Instead of placing the object to be heated (A) inside the cylindrical hole of the cylindrical heat radiator (2) to heat it, the object to be heated (A) may be heated while being transferred inside the cylindrical hole. good.

INDUSTRIAL APPLICABILITY The present invention can be applied to various cooking devices such as an oven, a grill, a refrigerator and a defroster. Also, the fuel used does not matter.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a front sectional view, FIG. 2 is a side sectional view, and FIG. 3 is a perspective view. FIG. 4 is a front sectional view showing another embodiment of the present invention, and FIG. 5 is a front sectional view showing a comparative example. (2) ... Cylindrical heat radiator, (3) ... Burner, (4) ...
... fan, (5) ... outer cylindrical body, (F) ... combustion gas path, (A) ... heated object.

Claims (1)

[Claims] 1. A cylindrical thermal radiator (2) having a space inside the cylindrical hole as an accommodation space for an object (A) to be heated is surrounded by an outer cylindrical body (5), and combustion gas from a burner (3) is blown by a fan (3). 4) The cylindrical heat radiating body (2) is provided with a combustion gas passage (F) that flows in the circumferential direction of the cylindrical heat radiating body (2) almost entirely and in one direction in the circumferential direction by forced ventilation by the cylindrical heat radiating body (2). A radiant heating device for cooking which is formed between the outer cylindrical body (5) and the outer cylindrical body (5).