JPH0811030B2 - Brown structure firing oven - Google Patents

Description

TECHNICAL FIELD The present invention relates to an oven structure for brown serve baking.

(B) Conventional technology Conventionally, in a baking oven, a so-called brown serve, which is baked to prevent the surface from being browned, despite the fact that the inside of the bakery factory is completely open Can it be fired for a short time and then served on the table?
Or, according to the customer's order, it is re-baked in an oven provided at the store and then sold with a brown color, and the bread made in this way has a freshly baked flavor, and The brown serve before re-baking has an excellent feature that it can be stored for several days.

(C) Problems to be solved by the invention By the way, the bread dough before baking is made of a material having low thermal conductivity such as starch, sugar, fats and oils, and is sponge-like by fermentation. Therefore, the thermal conductivity is extremely low. Therefore, in the oven of the conventional structure, since the inside of the dough is heated by the heat transfer from the surface, a large temperature difference occurs between the outside and the inside of the dough,
It was very difficult to perform firing by completely burning the inside without coloring the surface.

If the temperature of the oven is lowered to prevent the surface from being burnt, the moisture of the dough evaporates too much and it becomes a dry finish, impairing the flavor, and conversely if the temperature is raised, the surface will be overbaked. However, it has the drawback that it will be burnt too much and the inside will remain unfired, so it is unavoidable to use it for poorly blended dough, and it is not possible to bring out the original flavor of Brown Serve. It was

(D) Means for Solving the Problems In the present invention, a far-infrared radiator is arranged above the inside of the furnace, and the radiator is made to face the brown serve fabric placed on the upper surface of the floorboard, and The far-infrared radiation plate is composed of a far-infrared radiation plate and an upper heating element composed of an electric resistance heating element arranged below the far-infrared radiation plate at a predetermined interval. The far-infrared radiation plate (13) is made of an aluminum alloy. To provide a brown serve baking oven structure as a far-infrared radiation surface having a metal oxide and far-infrared radiation material particles on a lower surface of a metal substrate, which is coated with a rough finish by a spraying method using a binder. Is.

(E) Action In this invention, the brown serve fabric is heated by being irradiated with far-infrared rays from the far-infrared radiator, and the far-infrared rays penetrate into the fabric. Then, because it excites the rotational vibration of the material molecules inside the dough to generate heat, even if the dough has a low thermal conductivity, it is heated evenly inside and outside the dough. The increase in the temperature of the surface of the dough is suppressed by the diffusion of the water, and the brown color is prevented.

(F) Effect According to the present invention, the dough is heated uniformly inside and outside by irradiation from the far-infrared radiator, so that even if a rich dough is used, the inside is completely cooked and the surface is baked. There is an effect that it becomes possible to bake brown serve that does not stick.

Even for a tunnel kiln configured to continuously bake breads, the far-infrared radiator of the present invention is arranged above the kiln, and the brown serve dough is placed and moved on the upper surface of the conveyor. By irradiating the surface with far infrared rays, the surface is not burnt and the interior of the brown serve is completely fired. Moreover, since the aluminum alloy is used for the metal substrate of the infrared radiation plate, and the radiation method of the radiation surface is roughened, the temperature distribution of the radiation plate is made uniform and even wavelengths are distributed to each part in the furnace. And has the effect of being able to emit far infrared rays of intensity.

(G) Embodiment An embodiment of the present invention will be described in detail with reference to the drawings.
Indicates a baking oven for baking sweets and breads, and a furnace (1) with almost the same structure is installed in the upper and lower two stages in the center, various auxiliary machines are arranged below it, and display and control are provided on the left and right sides respectively. Department (2)
Are arranged to form an oven (A).

The furnace (1) has a furnace body outer wall (3) having a substantially rectangular parallelepiped space for accommodating the object to be fired therein, and an opening for loading and unloading the object to be fired in front of the outer wall (3) of the furnace body. A door body (4) that closes the door and is openable and closable. The outer wall (3) and the door body (4) are formed by enclosing the inner and outer peripheral surfaces of a heat insulating material with a metal plate or the like. 4) is provided with a heat-resistant glass window (5) for observing the inside of the furnace, and is configured so that the upper part of the door pivots forward and backward around a pivot (6) horizontally installed to open and close the opening. ing.

Below the inside of the furnace (1) is the inner bottom surface (7) of the furnace (1).
A thick floor plate (9) for placing the fabric (8) at a predetermined distance from is laid horizontally, and the floor plate (9)
Allows the object to be fired on the floor plate (9) to slide in and out through the opening by sliding on the upper surface of the floor plate support frame (10) provided below the floor plate (9). Further, a lower heat source (11) made of an electric resistance heating element such as a nichrome wire is arranged between the inner bottom surface (7) of the furnace and the floor plate (9).

Above the inside of the furnace (1), the dough (8) on the floor plate (9)
A far-infrared radiator (12) is arranged so as to face with the far-infrared radiator (12) and the far-infrared radiator (13) and the same radiator (13).
And an upper heating element (14) made of an electric resistance heating element, which is disposed below and at a predetermined interval.

The far-infrared radiation plate (13) radiates far-infrared radiation such as metal oxides such as silicon oxide, boron oxide, aluminum oxide, sodium oxide, titanium oxide and rare earth oxides on the lower surface of the aluminum alloy metal substrate (15). The raw material particles are coated with sodium silicate etc. as a binder using a thermal spraying method to form a far-infrared radiation surface (16), which is heated by near infrared rays and convection from a heat source irradiated on the radiation surface (16). ) Is heated and far infrared rays are emitted from the same surface (16).

Particularly, since the metal substrate (15) of the far-infrared radiation plate (13) is made of aluminum alloy having high thermal conductivity, the radiation plate (1)
The temperature distribution of 3) is made uniform, and far infrared rays of uniform wavelength and intensity are radiated to each part in the furnace (1).

The far-infrared radiation material may be coated by a method such as enamel coating, which means that the material can be applied to the surface of the metal substrate evenly at high temperature. However, in order to promote the scattering of radiated far infrared rays and make the far infrared intensity in the furnace uniform, it is desirable that the radiating surface is a rough surface. From this point, in the present embodiment, the radiating surface is a rough surface. It employs a thermal spraying method that finishes with.

The far-infrared ray used here excites the rotational vibration of the dough material molecules to heat the dough itself, and the longer the wavelength, the less attenuation in the middle and the greater the reach distance to the inside of the dough. is there.

And this wavelength and intensity can be adjusted by controlling the radiation surface temperature of the radiation plate.

In the figure, (17) indicates a probe for measuring the temperature inside the furnace.

The embodiment of the present invention is configured as described above, and the heating ratio of the brown serve to the dough (8) is far-infrared radiator (12) rather than direct heating from the lower heat source (11).
The far-infrared rays from the above do not heat the bread dough from the inside, so that the inside of the dough can be sufficiently cooked and the surface of the brown serve can be baked without browning.

Thus, the baked brown serve is completely gelatinized by heating from the inside, and by coloring and baking it in the store oven or a household oven, the taste and aroma of bread are added by the melding reaction by this baking. The flavor of freshly baked bread can be imparted.

Further, by arranging the far-infrared radiator above the inside of the tunnel kiln and irradiating the fabric conveyed by the conveyor with far-infrared rays, the surface is not burnt in the same manner as above, The inside of the brown serve can be burned with good efficiency.

[Brief description of drawings]

FIG. 1 is an overall front view of a brown-serve baking oven according to the present invention. FIG. 2 is a sectional side view of the same (I-I sectional view of FIG. 1). Enlarged sectional view (A): Oven (1): Furnace (8): Dough (9): Floorboard (12): Far infrared radiator

Claims (1)

[Claims] A far-infrared radiator (12) is provided above the inside of a furnace (1), and the radiator (12) is placed on the upper surface of a floor plate (9) to form a brown serve cloth (8). And the far-infrared radiator (12) is a far-infrared radiation plate (1
3) and an upper heating element (14) consisting of an electric resistance heating element arranged below the same with a predetermined interval, and the far infrared radiation plate (13) is a metal substrate (15) made of an aluminum alloy. The oven structure for baking the brown serve, which has a far-infrared radiation surface (16) with a metal oxide and far-infrared radiation material particles on the bottom surface of which is coated with a rough finish by a spraying method using a binder.