JPH03241231A - Cooking apparatus - Google Patents

Abstract

PURPOSE:To perform a uniform cooking by winding a heater wire on a pair of split core mica plates, and forming the wire by reducing its pitch from the centers toward the outer ends of both the plates. CONSTITUTION:A pair of spit core mica plates 28a, 28b are provided between a pair of upper and lower mica cover plates 27a and 27b, and one heater wire 29 is wound on the plates 28a and 28b. The wire 29 is formed by reducing its pitch (p) from the centers (a) toward the outer ends (b) of the plates 28a, 28b. Further, the plates 28a, 28b are mounted integrally between the pair of the plates 27a and 27b, and through holes are opened at the centers of the plates 27a, 27b. Thus, uniform and efficient cooking can be performed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a cooking device for cooking food by high-frequency heating or heater heating in an oven, for example, and particularly,
The present invention relates to a heater heating device in this heating cooking device.

(Prior Art) Conventionally, this type of heating cooking apparatus has been constructed as shown in FIGS.
No. 5).

That is, in FIGS. 5 and 6, an oven frame 2 is provided to form an oven 3 in a case body (cabinet) 1 having a box-shaped opening/closing door 1a. An excitation port 4 is bored in the back plate 2a of the oven frame 2. Also, the back plate 2 where this excitation port 4 is located
A waveguide 5 is provided to cover the excitation port 4, and a well-known magnetron 6 is attached to a portion 5a of the waveguide 5. Further, a heat insulating plate 7 is provided on the outside of the top plate 2b of the oven frame 2, and an upper heater 8 is disposed inside this heat insulating plate 7.

On the other hand, on the back side of the bottom plate 2C of the oven frame 2, a lower heater 9 and a heat insulating plate 10 are provided.

The upper and lower heaters 8.9, as shown in FIG.
To attach the upper and lower pairs, a frame-shaped core mica plate 12 is provided between the metal fittings 11a and llb, and the heater wire 13 is wound around the core mica plate 12 with uniform pinching over the entire surface. A core mica plate 12 wrapped with a core mica plate 12 is superposed and integrated with mica plates 14a and 14b having the same shape.

Note that a shelf board 15 on which the food to be cooked W is placed is provided inside the oven 3 so as to be freely insertable and removable.

Therefore, in the heating cooking apparatus described above, the shelf board 15 on which the food to be cooked W is placed is inserted into the oven 3 in advance.

Next, when heating the food W with a heater, the heating is performed by applying electricity to the upper and lower heaters 8.9.

(Problem to be Solved by the Invention) However, the upper and lower heaters 8 of the heating cooking device described above
．． 9 is because the heater wires 13 are wound around the core mica plate 12 at a uniform pitch over the entire surface, and in addition, if the lower heater 8.9 is a single unit, the temperature distribution will not be uniform. , when installed on the device, the heating temperature will be 8.9
Radiant heat from the outside of the center flows to areas without heaters and tends to be at a lower temperature.For this reason, for example, when baking a loaf of bread, it is difficult to heat the loaf of bread uniformly due to temperature unevenness. It is.

On the other hand, there is also an invention in which heating wires are wound at a uniform pitch over the entire surface of a flat core mica plate, such as the invention of ``toaster oven'' disclosed in JP-A No. 64-3422.
Similar to the specific example described above, for example, when baking bread, it is difficult to heat the bread uniformly due to temperature unevenness.

The present invention has been made in view of the above-mentioned circumstances, and the flat heater installed in the oven is adjusted to have a uniform temperature distribution according to the conditions inside the oven, and the bread is mixed with bread. To provide a heating cooking device capable of uniformly heating and cooking without causing temperature unevenness when baking.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides an oven frame in which an oven is formed inside a case body, a plane heater is laid on the bottom plate of this oven frame, and two parts forming the plane heater are provided. A heater wire is wound around a pair of core mica plates, and the heater wires are formed with a decreasing pitch from the center to the outer end of the two core mica plates.

(Function) According to the present invention, a heater wire is wound around a pair of core mica plates divided into two parts constituting a planar heater, and the heater wires are wound at pitches from the center of the two-core mica plates toward the outer ends. By making it smaller, the structure is configured in anticipation of the flow of radiant heat to areas where there is no heater, thereby ensuring uniform temperature distribution and preventing temperature unevenness when baking bread. It is cooked by heating.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In FIGS. 1 to 4, reference numeral 20 denotes a case body (cabinet) formed in a box shape and equipped with an opening/closing door 20a that opens sideways. 2] is provided to form an oven 22, and a well-known magnetron 23 is disposed on the side plate of this oven frame 21, as shown in FIG.

Furthermore, a reflective plate 24 having an arcuate cross section is attached to the middle of the top plate 22a of the oven frame 22.
Inside the reflection plate 24, an upper heater 25, such as a Milacron heater, is mounted horizontally. Furthermore, a plane heater 26 is installed on the back side of the bottom plate 22b of the oven frame 22, and this plane heater 26 is constructed as shown in FIGS. 1 and 2.

That is, in FIGS. 1 and 2, a pair of core mica plates 28a and 28b which are divided into two parts are provided between the upper and lower pair of mica cover plates 27a and 27b, and each core mica plate 28a , 28b, - number of heater wires 29 are wound around them.

In particular, this heater wire 29 is connected to the double-core mica plates 28a, 2
8b is formed with a decreasing pitch p from the center portion a toward the outer end portion. Furthermore, the pair of core mica plates 2
8a and 28b are a pair of mica cover plates 27a and 27.
A through hole 30 is bored in the center of each mica cover plate 27a, 27b.

Therefore, if the planar heater 26 is heated by being energized as it is, the temperature at the outer end of the double-core mica plate 28a128b will be higher than at the center a.
This plane heater 26 is connected to the bottom plate 22b of the oven frame 22.
Since it is anticipated that radiant heat will flow to the part without a heater by incorporating it into the heater, the temperature of the bottom plate 22b is adjusted to be a substantially uniform heating temperature.

On the other hand, as shown in FIG. 3, a flat heat insulating plate 31 is installed below the plane heater 26 to prevent the radiation of radiant heat to the outside. A drive motor 32 is attached to the drive motor 32 with a bracket (not shown). A rotary shaft 32a, which is integral with the output shaft of the drive motor 32, is provided to protrude into the oven 21 through the heat insulating plate 31, the through hole 30 of the planar heater 26, and the bottom plate 22b. Furthermore, this oven 21
A rotating mesh tray 33 having a plurality (three) of support rollers 33a is removably inserted into the rotating shaft 32a that protrudes inward.

Therefore, the bread W is now placed on the rotating mesh tray 33. After that, the drive motor 32, the upper heater 25, and the plane heater 26 are energized, so that the rotation shaft 32a of the drive motor 32 is At the same time as the inserted rotating mesh tray 33 rotates slowly, the bread W on the rotating mesh tray 33 is heated evenly and evenly by radiant heat generated by the upper heater 25 and the flat heater 26.

That is, since the heater wires 29 of the planar heater 26 are formed with the pitch p decreasing from the center part a toward the outer end of the two-core mica plates 28a and 28b, they can be heated by being energized as they are. Then, the double-core mica plate 28 a
Although the temperature at the outer end of the oven frame 22 is higher than that at the center a of the oven frame 28, the planar heater 26 can be assembled into the bottom plate 22b of the oven frame 22.
Since the temperature of 2b is adjusted to be a substantially uniform heating temperature, the bread W on the rotating mesh tray 33 is heated uniformly without any uneven baking by the radiant heat generated by the upper heater 25 and the flat heater 26. be done.

By coating the bottom plate 22b of the oven frame 22 with a radiation heat-resistant material, the bread W on the rotating mesh tray 33 can be heated uniformly and efficiently without any uneven baking.

〔Effect of the invention〕

As described above, according to the present invention, an oven frame forming an oven is provided in the case body, a plane heater is laid on the bottom plate of the oven frame, and a pair of two halves forming the plane heater are provided. Wrap the heater wire around the core mica plate,
By forming the heater wires with a decreasing pitch from the center to the outer edge of the double-core mica plate and incorporating the planar heater into the bottom plate of the oven frame, radiant heat can be transferred to the area where there is no heater. Since the structure is designed to allow for flow, the temperature inside the oven is adjusted to be evenly distributed by heating the inside of the oven, so when baking bread, it can be baked evenly and efficiently without causing temperature unevenness. It has excellent effects such as being able to cook well.

[Brief explanation of drawings]

FIG. 1 is a plan view of a plane heater incorporated in the heating cooking apparatus of the present invention, FIG. 2 is an exploded perspective view with a part of the plane heater omitted, and FIG. 3 is a heating cooking apparatus of the present invention. FIG. 4 is a sectional view of the apparatus, FIG. 4 is a perspective view of the same as above, FIG. 5 is a sectional view of a conventional cooking device, and FIG. 6 is an exploded perspective view of a plane heater incorporated in the conventional cooking device. 20...Case body, 21...Oven frame body. Obun, 5. Upper heater, 6. Plane heater, 8a1 28b. Core mica board, 2 heater wires, 31. Heat insulation board.

Claims (1)

[Claims] An oven frame forming an oven installed inside the case body, a plane heater laid on the bottom plate of this oven frame, a pair of core mica plates divided into two that constitute this plane heater, and both cores. A heating cooking device comprising a heater wire wound around a mica plate, and a pitch of the heater wire decreasing from the center to the outer end of the double-core mica plate.