JPH0350421A - Heating structure in heating and cooking device - Google Patents

Abstract

PURPOSE:To heat a central part of a top side heating heater at a temperature slightly higher than that of a surrounding part of the heater by a method wherein one of a plurality of heater lines arranged around an outer circumference of the top side heating heater is changed over to a single heater line arranged at a central part. CONSTITUTION:A terminal end of a heater line 5 is connected to a commercial power supply 10, a terminal end of a heater line 6 is connected to the commercial power supply at one end and further connected to a contact point terminal 12 of a changing- over switch SW11 acting as a changing-over means at the other point, respectively. A terminal end of the heater line 8 is connected to the commercial power supply 10 at one end and the other is connected to a contact terminal 13 common with a changing-over switch SW1 of the heater line 6. The heater line 8 is set such that the heater power becomes 600W, for example. For example, a cut-piece 14 of the changing-over switch SW111 is changed over to a contact point terminal 13 of the heater line 8, both heater lines 5 and 8 in which a parallel circuit with the heater lines 5 and 8 is formed are electrically energized, the heating heater H1 may heat with an electrical power of 1200W. The heating heater H1 becomes a top surface heating heater arranged at a top surface side of the heating chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a cooking device such as an electric oven, and more particularly to a heater structure of a cooking device.

(mouth) Conventional technology FIG. 5 shows the heater structure of a conventional heating cooker.

In the figure, the heater structure is such that mica plates 40a and 40b, which are U-shaped flat slopes with a constant width, are arranged facing each other so that a substantially square opening A is formed in the center.
A heater Iij 41 is spirally wound over the front and back surfaces of the heater wire 40b, and the end of the heater wire 41 passes through a hole 43 provided in the mica slope 40 and is connected to the heater control section. .

In addition, Mica slope 40a. 40b is provided with a large number of slits 42 through which the heater wires of the back side are exposed, and the mica temporary 40 units. 40b is the mounting piece 40C. 40d is caulked to the temporary mica mounting 44. Conventional heaters constructed in this manner are attached to the top and/or bottom of the heating chamber so that the amount of heat generated over the entire surface of the heater is uniform.

(C) Problems to be Solved by the Invention However, although the above-mentioned conventional heater structure can uniformly heat the food to be cooked, it does not reduce appetite, especially when grilling fish using the top heater. There was a drawback that it did not get the browning that would make it so appealing.

This invention was made in consideration of the above circumstances, and is a heating cooker heater that eliminates the above drawbacks and adds overall uniform heating and local heating functions to the top side heater used especially when grilling. Provide structure.

(2) Means for Solving the Problems This invention provides a heating cooker equipped with heating heaters on the top and bottom parts of the heating chamber, in which the heaters on the top side are arranged horizontally facing each other and in the center. A pair of U-shaped insulating plates forming a substantially square opening, multiple heater wires wound spirally in parallel across the front and back surfaces of the U-shaped insulating plates, and an opening in the U-shaped insulating plates. The square shape placed inside! T-board and
It consists of a single heater wire that is spirally wound over the front and back surfaces of a square insulating plate, and the output end of one heater wire of the multiple heater wires is connected to the output end of the other heater wire of the multiple heater wires. This heater structure includes a switching means for selectively switching the connection between the end or the output end of a single heater wire.

A specific example of the heating cooker in this invention is an electric oven.

(E) Effect According to this invention, one heater wire of the multiple heater wires located at the outer periphery of the heater on the top side is switched to a single heater wire located at the center of the heater, and then heated. When the other heater wire and the single heater wire are respectively energized, the center of the heater can be heated to a higher temperature than the outer periphery of the heater, thereby imparting an appetizing browned color to the food. be able to. Further, by energizing the multiple heater wires of the top heating heater and alternately energizing the belly heater wire and the lower heater wire, the food can be heated evenly.

(F) EXAMPLES The present invention will be described in detail below based on examples shown in the figures. Note that this invention is not limited by this.

In FIG. FIG. 1 is a perspective view showing the structure of a heater that is an embodiment of the present invention. In the same figure, la and lb are a pair of mica insulating plates that are U-shaped and have a substantially constant width, and are placed horizontally opposite each other to form an approximately square opening in the center. ing. On these mica plates 1a and lb, Kouro 2a and 2b,
Mounting pieces 3a and 3b are provided. Reference numeral 4 denotes a mica plate for mounting, which is used to position and fix the mica plates 1a and lb.
It is caulked using b. The heater wire 5 is inserted from the hole 2a of the mica plate 1a, and is connected to the mica plate 1a, lb.
It is wound spirally at every pitch over the front and back surfaces of the holder, and is pulled out from the hole 2b. In addition, the heater wire 6
is inserted through the hole 2a of the mica plate 1a, and the mica plate 1
The heater wire 5 is wound between the unwound pitches over the front and back surfaces of the wires a and tb, and is pulled out from the hole 2b. The heater wires 5.6 constitute a multiple heater wire.

Mica board 1a. A flat mica plate 7 serving as a substantially square insulating plate is disposed in the central opening B of 1b, and is caulked to the mica plate 4 for attachment. The heater wire 8 is inserted through the hole 9a, wound spirally over the front and back surfaces of the flat mica IiE7, and then pulled out through the hole [9b]. This heater wire constitutes a single heater wire.

FIG. 2 is a circuit diagram showing the above-mentioned heater H1 and its peripheral circuit. In the figure, the terminal portion of the heater wire 5 is connected to a commercial power source 10, and the terminal portion of the heater ts6 is connected to a commercial power source lO on one side and a changeover switch SW as a switching means. The contact terminals 12 of Z are connected to each other. The heater wire 5 and the heater wire 6 are each set to have a heater power of 600 W, for example.

Also, one end of the heater wire 8 is connected to the commercial power supply IO,
The other end is connected to the changeover switch SW of the heater wire 6 and a common contact terminal l3. The heater wire 8 is set so that the heater power increases to 600W, for example. For example, when cooking fish, the changeover switch sw. When the intercept 14 of tt is switched to the contact terminal 13 side of the heater wire 8, a parallel circuit is formed between the heater wire 5 and the heater wire 8, and both heater wires 5.8 are energized, the heater H, It will be heated with a power of 200W. This heater H, becomes a top side heater provided on the top side of the heating chamber, as will be described later.

Moreover, H is a lower surface side heater conventionally provided on the lower surface side of the heating chamber, and heats with a power of, for example, 120 OW. One end of the lower side heater H, is connected to the commercial power source 10, and the other end is connected to a changeover switch SW. 16. The changeover switch SW316 performs ON/OFF control of the lower surface side heater Ht. Furthermore, the changeover switch SWt
ll and commercial power! A changeover switch SWtl5 is connected between the heaters H1 and 15, and this changeover switch SW,15 performs ON/OFF control of the heater H1. Note that the control of the changeover switches SWt and SW is controlled by a microcomputer built in the electric heater as a heating cooker, and the ON/OFF control is the same as the conventional control, so the explanation will be omitted. .

FIG. 3 is a perspective view showing the electric oven main body.

In the figure, 20 is the main body, and 2l is a heating chamber, and in this heating chamber 2l, the top side heater H1 and the bottom side heater H are provided as described above. In addition, 22 is a door provided in the front surface of the zero body 20 so that it can be opened and closed, and 23 is an exterior steel plate.

FIG. 4 is a longitudinal sectional view of the main body 20. In the same figure, 24
is a thin insulation material installed on the top of the heating chamber.
The top side heater H is installed in the recess provided in this heat insulating material 24.
．． is mounted horizontally. Reference numeral 25 denotes a thin heat insulating material provided on the lower surface side of the heating chamber, and a lower surface side heater H is horizontally attached to a recess provided in this heat insulating material 25.

Next, a specific example of the continuous t4 control of the top side heater H1 and the bottom side heater H will be described.

First, in grill cooking where the surface of the food such as fish needs to be browned, selector switch SW. A user operates Z to form an energizing circuit in the heater wire 8. Next, SW. 15 is turned on to energize the heater H1. At this time, the contacts of the changeover switch SWal6 are in the open and down position, and only the top heating heater Hl is in the energized heating state. In addition, in the case of normal oven cooking, selector switch SW, heater wire 6
side, the top side heater HI is energized, and the changeover switch SW31B is short-circuited to energize the bottom side heater H. In this state, for example, the top side heater H is energized for 10 seconds and then turned off, and then the bottom side heater H. Turn on the power for 10 seconds and then turn it off. By alternately energizing the top side heater H and the bottom side heater H in this way, the temperature inside the heating chamber is controlled.

(G) Effects of the Invention According to this invention, one heater wire of the multiple heater wires arranged on the outer periphery of the top side heater is switched to a single heater wire arranged in the center. For example, in grill cooking, for example, the other heater wire of the multiple heater wires and the single heater wire can be combined to perform a heating operation, and this allows the center of the top heater to reach a slightly higher temperature than the outer periphery. It can be operated by heating. Therefore, when the food to be cooked is fish, it is possible to impart an appetizing brown color to the fish.

In addition, in the case of normal oven cooking, the multiple heater wires of the top heater are energized, and the top heater and the bottom heater are energized alternately, so the temperature in the heating chamber does not rise. It can be done quickly, and the food can be heated evenly, making it possible to cook efficiently.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the structure of a heater in an embodiment of the present invention, Fig. 2 is an electric circuit diagram showing the heater and its peripheral circuit, and Fig. 3 is an electric oven using the same heater. FIG. 4 is a longitudinal sectional view of the electric oven shown in FIG. 3, and FIG. 5 is a perspective view showing the structure of a conventional heater. H1...Heating heater on the top side, la, lb...
... U-shaped insulating plate, 5.6 ... Multiple heater wire, 8 ... Single heater wire, 11 ... Switching means. Younger brother 1 Figure H1 Figure 3 Figure 4

Claims (1)

[Claims] 1. In a cooking device equipped with heaters on the top and bottom of the heating chamber, the heaters on the top side are arranged to face each other horizontally and have a substantially square opening in the center. A pair of U-shaped insulating plates to be formed, a return heater wire wound spirally in parallel across the front and back surfaces of the U-shaped insulating plates, and a heating wire disposed within the opening of the U-shaped insulating plate. It consists of a square insulating plate and a single heater wire wound spirally over the front and back sides of the square insulating plate, and furthermore, a double heater wire is attached to the output end of one of the multiple heater wires. A heater structure for a heating cooker comprising a switching means for selectively switching the connection to the output end of the other heater wire or the output end of a single heater wire.