JPH05317190A - Baking machine - Google Patents

Abstract

PURPOSE:To heat a material to be heated from both top and under surfaces uniformly and efficiently while reducing the number of installed heat sources to contrive to economize in energy consumption. CONSTITUTION:A heat source(13) is arranged only below a baking chamber (7) and a combustion gas from the heat source is guided to the top surface side of the baking chamber (7) through a combustion gas passage (11) formed on the outside of the baking chamber (7) by the use of natural convection. The combustion gas is taken into the baking chamber(7) from gas blowing holes(15) provided in the top board(6) of the baking chamber(7) so that a material(F) to be heated can be directly heated from the top surface side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pottery used for baking and cooking fish, meat, eggs, etc., and more particularly to a tunnel type automatic pottery machine.

[0002]

2. Description of the Related Art Conventionally, a continuous automatic pottery machine for heating and baking an object to be heated on a conveyer while transferring it is used as a continuous automatic baking machine in which a heat source such as a burner is arranged on the upper side of the conveyer. There are well-known systems, a bottom surface heating system in which heat sources are arranged on the lower surface side and a double-sided heating system in which heat sources are arranged above and below.

[0003]

However, in the case of a single-sided heating type baking machine for the upper surface or the lower surface, the essential problem is that both sides of the object to be heated cannot be evenly baked during the transfer process of one stroke. However, there is a problem in that baking and cooking are troublesome because the work to be heated is turned over.

Further, since the upper and lower double-sided heating type kilns are provided with heat sources above and below the object-to-be-heated conveyer, maintenance is troublesome in combination with the complexity of the apparatus, and energy such as fuel gas is used. It has a drawback that it consumes a large amount of heat and that heat is lost. In addition, the amount of oil smoke generated from the object to be heated is large, which not only easily damages the heat sources such as burners provided above and below, but also has a drawback that the work environment is significantly contaminated.

The present invention eliminates the above-mentioned drawbacks,
It is an object of the present invention to provide an automatic pottery machine having a simple structure capable of efficiently and uniformly baking an object to be heated by making maximum use of thermal efficiency.

[0006]

According to the present invention, a heat source is arranged only below a firing chamber in which an object to be heated is housed, but the natural convection of combustion gas is utilized to move the firing chamber up and down and to the left and right. Therefore, uniform heating can be performed efficiently.

That is, in the pottery machine according to the present invention, the bottom plate (4), the left and right side plates (5) and the ceiling plate (4) are placed around the firing zone (II) which is generally constituted by the object-to-be-heated conveyer (1). A firing chamber (7) is formed inside by enclosing it with a plate (6), and the outside of the firing chamber (7) is surrounded by a heat insulating wall (10) with a predetermined gap and a combustion gas between them. The heat source (13) is arranged on the top plate (6) by forming the passage (11) and the opening (12) at the center of the bottom wall (10a) of the heat insulating wall (10). It is characterized in that a plurality of combustion gas injection holes (15) are formed by being formed.

In order to facilitate cleaning and other maintenance work of the baking chamber (7), the top plate (6) and the heat insulating wall (10) above the top plate (6) can open and close the baking chamber (7). It is advantageous to configure it as a lid (16) that does.

In order to increase the heating efficiency of the top plate (6) from above, the top plate is composed of a corrugated plate having a corrugated cross section in the transfer direction of the object to be heated by the conveyor (1). It is advantageous to form a far infrared radiation ceramic coating layer (6a) on the lower surface thereof.

[0010]

The combustion gas from the heat source (13) provided below the firing chamber (7) rises and convects in the combustion gas passage (11) to surround the firing chamber (7) with the bottom plate (4) and side plates (5). Also, the top plate (6) is heated, and the object to be heated (F) is heated from the surroundings by radiant heat from them. On the other hand, the combustion gas is introduced into the firing chamber (7) through the combustion gas blowing hole (15) provided in the top plate (6) to directly heat the object to be heated (F) from the upper surface side.

[0011]

1 and 2 show the overall construction of a tunnel-type automatic pottery machine according to the present invention. In these figures, the object-to-be-heated conveyer (1) is a pair of left and right roller chains (1a) (1a) installed in parallel on the left and right sides of the machine frame (2).
A tray (3) or a grill for supporting the object to be heated can be placed on the upper traveling side upper surface of the two chains via an attachment. The conveyor (1) is rotated by a motor (not shown) in the direction of the arrow in FIG. 1, and one end in the lengthwise direction thereof is a charging zone (I) for the article to be heated (F), The other end is the extraction zone (III), and the middle part is the tunnel-shaped firing zone (II).

In the firing zone (II), the heated conveyer conveyor (1) is surrounded by a bottom plate (4) as shown in FIG.
It is surrounded by the left and right side plates (5) and (5) and the top plate (6), and a tunnel-shaped firing chamber (7) is formed inside them. Moreover, a smoke exhauster (8) in the form of a bridge is provided at both ends of the firing chamber (7) so as to straddle the left and right edges of the machine frame (2). The smoke evacuator (8) has a U-shaped cross section with an open bottom surface, and a smoke exhaust hole (9) having a rectifying plate (9a) is provided on the top surface of the smoke exhaust chamber (8) at both ends of the firing chamber (7). It draws in hot air from and releases it to the atmosphere.

A heat insulating wall (10) is formed outside the firing chamber (7) so as to surround it. The heat insulating wall (10) is arranged between the bottom plate (4), both side plates (5) and the top plate (6) with a predetermined space or gap therebetween, and a combustion gas passage (11) therebetween. (See FIG. 3). Moreover, the bottom wall portion (10a) of the heat insulation wall (10) is inclined in a funnel-shaped cross section, and the slit-shaped opening portion (12) is formed in the center thereof.
And a heat source (13) such as a burner is arranged in the opening. The heat source (13) is divided in the lengthwise direction of the firing chamber (7) so as to be able to adjust the individual temperatures of the inlet portion, the intermediate portion, and the outlet portion (see FIG. 2). , The combustion control can be individually performed.
The heat source (13) is not limited to the burner, and an electric heating element may be used.

An overheat prevention plate (14) is provided between the heat source (13) and the bottom plate (4). This overheat protection plate (14)
The bottom plate is for the purpose of preventing combustion flame from the heat source (13) from directly hitting the bottom plate (4) to cause thermal deformation or generating a burning spot on the object to be heated (F) due to local heating. While radiating heat from (4) is made uniform,
It is supposed that the rising convection of the combustion gas is generated smoothly by the inclination of both sides.

The top plate (6) which defines the upper surface of the baking chamber (7) is, as shown in FIGS. 1 and 2, a corrugated plate having a corrugated cross section in the conveying direction of the object to be heated of the conveying conveyor (1). It is composed of. Then, a plurality of combustion gas injection holes (15) are formed at the tops of the downwardly bent corrugated portions at intermediate portions in the lengthwise direction.

Further, an upper wall portion (10c) of the heat insulating wall (10),
The top plate (6) located on the lower surface side is divided into a plurality of parts in the length direction of the baking chamber (7), and each of them serves as a lid (16) capable of opening and closing the baking chamber (7). It is configured. As shown in FIG. 3, the lid (16) has its base end pivotally attached to the upper end of the side wall portion (10b) of the heat insulating wall (10) via a hinge (17), and a handle (18) of the free end is provided. ) And can be opened and closed.

The far-infrared radiation ceramic coating layer (6a) (see FIG. 3) is formed on the lower surface of the top plate (6), and the baking chamber (7) is combined with the increase of the heat radiation area by using the corrugated plate. It is designed to radiate a sufficient amount of heat from above.

In the above structure, the combustion gas generated from the heat source (13) first hits the overheat prevention plate (14) to heat it, and uniformly heats the bottom plate (4) above it. Therefore,
Object to be heated (F) transferred by the conveyor (1)
Then, a sufficient amount of heat is applied from the lower surface side of the firing chamber (7).

Subsequently, the combustion gas ascends and convects in the combustion gas passage (11) to radiate hot air from the side surface to the firing chamber (7) and further to the gas passage (11) on the upper surface side of the top plate (6). )
Then, after heating the top plate (6), it is blown into the firing chamber (7) from above through the combustion gas blowing hole (15). Therefore, the object to be heated (F) transferred in the firing chamber (7) is heated by the radiant heat diffused and radiated from the corrugated top plate (6), while the combustion gas blowing hole (1
It is directly heated from the top side by the combustion gas blown from 5).

Therefore, the object to be heated (F), which is carried from the carry-in zone (I) to the conveyor (1) and sent to the firing chamber (7), is mainly passed through the process of passing through the firing chamber (7). It is uniformly heated from both the upper and lower sides, and it is taken out from the carry-out zone (III) in a good baked state.

Cleaning of dirt in the firing chamber (7) and other maintenance are performed by opening the lid (16) upward to open the firing chamber (7) as shown in FIG. is there.

By the way, the present invention is similarly applied to not only the tunnel-type continuous automatic pottery machine as shown in the above-mentioned embodiment but also the batch-type pottery machine for manually putting in and out the object to be heated in the firing chamber. You can. Therefore, the term "firing zone" used in this specification is used to refer to a region portion that constitutes the firing chamber, and is not necessarily limited to only a portion of the conveyor.

[0023]

EFFECTS OF THE INVENTION The pottery machine according to the present invention disposes a heat source only on the lower surface side of the firing chamber, but heats the firing chamber from the surroundings by utilizing natural convection of the combustion gas. By taking in the baking chamber from the upper surface side, heating can be performed uniformly and efficiently from the upper surface side. Therefore, the heat from the heat source can be effectively utilized without any loss and a good baked state can be obtained, and the remarkable effect can be realized in the improvement of economic efficiency and labor saving by the reduction of energy consumption.

If the upper heat source is abolished and the combustion gas from the lower heat source is guided to the upper part of the firing chamber by simply utilizing natural convection and is heated from the upper surface side, the upper surface of the object to be heated is burnt. While it is difficult to attach it, in the present invention, the combustion gas is introduced into the firing chamber through the combustion gas blowing hole provided in the top plate, and the object to be heated is directly gas heated from the upper surface side. As a result, it is possible to impart an appropriate charring to the upper surface of the heated material in a shape that is in harmony with the baking degree, and to obtain a baked food material having an excellent delicious appearance.

Further, since the heat source is provided only below the firing chamber and the installation of the upper burner is unnecessary, the structure can be simplified, and both manufacturing and maintenance can be easily performed. It is possible to reduce manufacturing costs and maintenance costs.

Further, since the upper heat source is not required, the upper heat insulating wall and the top plate can be constructed as a lid which can be opened and closed, so that it is easy to inspect and maintain the firing chamber. It can be done.

Furthermore, by forming the top plate with a corrugated plate as in claims 3 and 4, or by further providing a far-infrared radiation ceramic layer on the lower surface thereof, the heating efficiency from the upper surface side is further improved. It can be excellent.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of a tunnel-type automatic pottery machine according to the present invention, showing a state in which a lid is opened.

FIG. 2 is a vertical cross-sectional view of the pottery machine of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Heated object conveyance conveyor 4 ... Bottom plate 5 ... Side plate 6 ... Top plate 6a ... Far-infrared radiation ceramic coating layer 7 ... Firing chamber 10 ... Thermal insulation wall 11 ... Combustion gas passage 12 ... Open part 13 ... Heat source 14 ... Overheat prevention plate 15 ... Combustion gas injection hole

Claims (4)

[Claims] 1. A bottom plate (4) around the firing zone (II).
And the left and right side plates (5) and the top plate (6) are surrounded to form a baking chamber (7) inside thereof, and the outside of the baking chamber (7) is separated by a heat insulating wall (10) with a predetermined gap. The heat insulating wall (10) is formed while enclosing a combustion gas passage (11) between them.
An open part (12) is formed in the center of the bottom wall part (10a) of the to dispose a heat source (13), and a plurality of combustion gas injection holes (15) are formed in the top plate (6). It is a pottery machine. 2. The top wall (10) of the top plate (6) and the heat insulation wall (10)
The pottery machine according to claim 1, wherein C) is configured as a lid (16) that can open and close the firing chamber (7). 3. A tunnel type automatic pottery machine according to claim 1 or 2, wherein the top plate (6) is composed of a corrugated plate having a corrugated cross section. 4. The pottery machine according to claim 1, wherein a far-infrared radiation ceramic coating layer (6a) is formed on the lower surface of the top plate (6).