JPS63172838A - Oven - Google Patents

Abstract

PURPOSE:To uniformly heat the interior of a burning chamber by providing temperature adjustors on a desired number of hot plates formed into the shape of a thin box having therein spacers for circulating heated air. CONSTITUTION:On both side walls 15 and 15a and a remote wall 14, beams 19 on which hot plates 22 are fitted and placed are provided in four stages. At three side parts of hot plates 22, ventilation ports 220 and ventilation ports 220a are formed, and smoothing plates 221 concurrently used for temperature adjustment and reinforcement are provided therein, and the circulation of heated air is adjusted and the heating plates 222 of hot plates 22 are uniformly heated. Heated air sucked by a sirocco fan 11 passes through hot plates 22, and thereafter is mixed with heated air from a burning chamber 3 via a duct 48 and is again sucked by the sirocco fan 11. Heated air repeats its circulation and a material to be burnt is burnt by radiation heat and the like of heating plates 222.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application in Industry] The present invention relates to a heated air circulation type oven.

[Prior art and its problems] A conventional heated air circulation type oven is shown in FIG. 9th
In the figure, the object to be fired on a hot plate 91 attached to a crosspiece 90 is fired by heated air circulating in a firing chamber 93 by a sirocco fan 92.

However, when the hot plate 91 is made into a multi-stage type using this method, the flow of heated air is concentrated on the sirocco fan 92 and the firing chamber 93 is heated.
It is difficult to uniformly circulate heated air throughout the interior, and the objects to be baked on the hot plate 91 are likely to be baked unevenly.

Furthermore, since the object to be fired is constantly exposed to heated air, there are also problems in that the surface wrinkles or the surface becomes dry.

[Objectives of the present invention] The objects of the present invention are: 1) To uniformly heat the inside of the firing chamber, and even if the heating plates are multi-staged, firing heat can be distributed to each heating plate so that baking can be performed uniformly. , The installation area of the oven can be made smaller than that of conventional ovens with the same baking capacity. To eliminate wrinkles and cracks on the surface of the object to be fired by firing the object using the heat generated by the heat generated by the heat generated by the heat source. This is the case.

[Configuration of the present invention] The configuration of the present invention taken to achieve the above object is as follows. That is, in the present invention, the heating chamber and the baking chamber are separated, and the back of the wall of the baking chamber is a passage for heated air heated in the heating chamber, and a fan is installed in the passage. An oven body having a heating air circulation opening provided on the wall of the chamber; and an arbitrary number of heating plates formed in a thin box shape and each having a space inside which heated air is circulated; The plate is an oven characterized by being equipped with a temperature control device.

The hot plate installed within the oven body can be removable from the oven body or can remain fixed. Generally, small ovens are removable so that large objects can be baked, while large ovens are fixed. The temperature adjustment device is one that adjusts the temperature so that the entire hot plate has a uniform temperature;
It includes both the one that adjusts the temperature of the hot plate up and down.

Further, examples of the heat source of the oven include a gas burner, an electric heater, a kerosene burner, and the like.

[Example 1] Figure 1 is a perspective view showing the open state of the embodiment of the present invention, Figure 2 is a schematic sectional view taken along line A-A in Figure 1, and Figure 3 is a cross-sectional view taken along line B in Figure 1.
-Bllll plane sectional view Figure 4 is a schematic screen view of CC@ of Figure 1. Figure 5 is a perspective view of the hot plate.

The code (1) is the oven main body, which has a heating chamber (2) and a baking chamber (
3), and the heating chamber (2) and the firing chamber (3) are separated by a partition plate (4).

A Bunsen burner (δ) is installed on the door (5) side of the heating chamber (2).
is installed, and the bottom plate below the Bunsen burner (5)
7) is provided with a secondary air intake (8). On the back side of the Bunsen burner (6), a rectifier plate (12) is installed on the bottom plate (7) so that the secondary air flowing in from the secondary air intake port (8) does not immediately flow toward the duct (48), which will be described later. It is a standing structure. As a result, sufficient secondary air is supplied to the Bunsen burner (6), resulting in good combustion.

A steam generation chamber (42) is provided below the partition plate (4), and a water sprinkler pipe (9) is disposed in the steam generation chamber (42).

On both side walls (15), (15a) and back wall of the firing chamber (3), there are crosspieces (19) into which the hot plates (22) are fitted and placed.
) are provided in four stages. And both side walls (15)
, (15a) have steam injection pipes (150), (150a) erected on the side of the door (5) that communicate with the steam generation chamber (42). Steam injection pipe (150), (150a
) is provided with an injection port (151) at a position corresponding to the position of the hot plate (22) attached to each crosspiece (19).

The back sides of both side walls (15) and (15a) are ducts (17) and (17a) through which heated air circulates, respectively.

Also, on the back side of the back wall (14) is a duct (48) leading from the heating chamber (2) to the suction port of the sirocco fan (11), which will be described later.
is provided. The back side of the duct (48) is the bulkhead (162)
A duct (16) is formed through it.

The duct (16) communicates with the ducts (17) and (17a), and a sirocco fan (11) driven by a motor M is disposed in the duct (16).

In addition, a heated air inlet (18) is formed in the partition wall (162) at a position corresponding to the sirocco fan (11), and an exhaust port (160) is provided in the ceiling of the duct (16). . And at the location of the crosspiece (19),
), a circulation port (190) opened in the back wall (14) and communicating with the duct (48), a crosspiece (19) and both side walls (15)
, (15a), and the duct [ty) , (1
A circulation port (19Qa) leading to 7a) is provided.

On the other hand, the hot plate (22) attached to the oven body (1) is formed into a thin box shape with a space inside, and has a circulation port (190) and a circulation port (190a), which will be described later, on three sides. A vent hole (220) and a vent hole (220a) are formed to communicate with the vent hole (220) and the vent hole (220a). Inside the hot plate (22), a rectifying plate (221) is provided which serves both for temperature adjustment and reinforcement, and adjusts the circulation of heated air so that the heat generating plate (222) of the hot plate (22) is evenly heated. There is. Note that the current plate (221) can be omitted by appropriately changing the size of the vent hole (220) and the vent hole (220a).

FIG. 6 is a sectional view of a main part showing another embodiment of the hot plate. The inside of the hot plate (22) is divided into upper and lower parts by a partition plate (223), and includes a heated air circulation chamber (224) and a heat generating plate (222).
An adjustment chamber (225) is provided between the
The temperature of the heating plate (222) and the heated air circulation chamber (
(224) can be adjusted by adjusting the distance between the two and the two (224) using the adjustment screw (226).

FIG. 7 is a sectional view of a main part showing still another embodiment of the hot plate. In this embodiment, an arbitrary number of ventilation holes (228) are provided at arbitrary positions on the partition plate (223), and on the partition plate (223),
An arbitrary number of adjustment plates (227) are provided with matching holes (229) that fit the ventilation holes (228), and the adjustment plates (227) can be slid to open the ventilation holes (228).
Align the matching hole (229) with the heated air to the adjustment chamber (225).
) to adjust the temperature of the heat generating plate (222).

According to this structure, it is possible to more precisely adjust the temperature of each part of the heat generating plate (222).

FIG. 8 is a perspective view of the obturator.

When removing the hot plate (22), such as when the object to be baked is large, fit the closing tool (23) into the empty crosspiece (19) from which the hot plate (22) has been removed, and connect it to the circulation port (190). Mouth (1
90a) to prevent heated air from circulating inside the firing chamber (3).

Note that the means for closing the circulation port (190) and the circulation port (190a) is not limited to this method; for example, a shutter for closing the circulation port (190) and the circulation port (190a) is provided, When you take out the
90) and the circulation port (190a) are closed with a shutter, and when the hot plate (22) is attached, a mechanism for opening the shutter can be used.

Operation-■ To explain the operation of this embodiment, air heated by the Bunsen burner (6) flows through the heating chamber (2), passes through the duct (48), and is sucked into the sirocco fan (11). At that time, sirocco fans (11
) The secondary air flowing in from the secondary air intake port (8) tries to head toward the duct (48) side due to the suction force of the secondary air intake port (8), but it is rectified by the rectifying plate (12) and sent to the Bunsen burner (6) side. Helps its combustion.

The heated air sucked into the sirocco fan (11) is discharged by the same sirocco fan (11), and is then passed through the duct (1
6) and ducts (17), (17a), enters the ventilation port (220) from the circulation port (190a) of both side walls (15), (15a), passes through the hot plate (22), and then enters the ventilation port (220). It passes through the opening (220a), passes through the circulation opening (190) in the back wall (14), passes through the duct (48), and enters the firing chamber (2).
It mixes with the heated air from the air and is sucked into the sirocco fan (11) again.

Also, during this time, a portion of the heated air is exhausted to the outside from the vent (160).

The heated air repeats the above-mentioned circulation, the heat generating plates (222) of each hot plate (22) are heated, and the object to be baked is baked by the radiant heat generated thereby. Further, the temperature of the heating plate (222) is adjusted as appropriate depending on the type of the object to be fired.

If steam is required during firing, use the steam generation chamber (
When water is sprinkled from the water sprinkling pipe (9) in the steam generation chamber (42), steam is immediately generated because the bottom of the steam generation chamber (42) is heated by the Bunsen burner (6), and the steam injection pipe (150)
, from the injection port (151) of (150a) to the firing chamber (3
) and is evenly sent into the firing chamber (3).

[Effects of the invention] The present invention has the above-mentioned configuration. (a) By circulating heated air in each hot plate installed in the baking chamber of the oven, the object to be baked is not exposed to heated air and is exposed to radiant heat. Since the firing is performed by the above method, wrinkles do not occur on the surface of the fired object, and the surface does not become dry.

(b) Since heat can be distributed evenly to the objects to be fired on any hot plate, multi-stage firing is possible, and with the same firing capacity, the machine can be designed taller than before. The installation space is small.

(C) Since the temperature of the heating plate of the heating plate can be adjusted by the temperature adjustment device provided on the heating plate, it is possible to set the temperature according to the type of object to be fired and the uniform temperature of the heating plate, and A fired product of good quality can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention in an open state; FIG. 2 is a schematic sectional view taken along line AA in FIG. 1; FIG. 3 is a schematic sectional view taken along line BB in FIG. Figure 4 is a schematic screen view of CC in Figure 1. Figure 5 is a perspective view of the hot plate. Figure 6 is a cross-sectional view of main parts showing another embodiment of the hot plate. Figure 7 is a further diagram of the hot plate. FIG. 8 is a perspective view of a closure, and FIG. 9 is a perspective view of a conventional heated air circulating oven.

Claims (1)

[Claims] The heating chamber and the firing chamber are separated, the back of the wall of the firing chamber is a passage for heated air heated in the heating chamber, and a fan is disposed in the passage, An oven body in which a heating air circulation port is provided on the wall of the baking chamber; and an arbitrary number of hot plates formed in a thin box shape and each having a space inside which heated air is circulated; An oven characterized in that the hot plate is equipped with a temperature control device.