JP2011196603A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker capable of quickly and evenly baking a heated object like toast.SOLUTION: In this heating cooker including a heating chamber 2 for heating the heated object 100, and a feed port 3 formed on a bottom section of the heating chamber 2 and having a cover 4 constituted of a dielectric body for tightly closing a connection opening of the bottom section and a rotary antenna 5 for supplying microwave to the heating chamber 2, lower heaters 9 having rapid heating property higher than that of a sheathed heater, are disposed at both sides at an outer side of the feed port 3 or on the bottom section at a depth side of the heating chamber 2.

Description

  The present invention relates to a cooking device, and more particularly to a lower heater of a high-frequency cooking device and its arrangement.

  A high-frequency heating cooker (hereinafter referred to as a microwave oven) has a mainstream without a turntable as a mounting table for a heated portion. Many of such microwave ovens generally have a function of high-frequency heating using microwaves and electric heating using a heater. As such a microwave oven, a power supply port, a cover made of a dielectric material that seals the connection opening between the power supply port and the heating chamber, and a heater (lower heater) around the power supply port are installed at the bottom of the heating chamber. Have been proposed (see, for example, Patent Document 1). The document also discloses that a heater is installed around the rotating antenna in the feeding port where the rotating antenna is installed.

JP 2002-286229 A

  However, as disclosed in Patent Document 1, when a heater is provided in the periphery of the power supply port, the heat radiated above the bottom surface of the heating chamber is dispersed. Not suitable for cooking that burns (bakes) heated items. Further, when a heater is provided in the periphery of the rotating antenna in the power supply port, the heat of the heater is dispersed inside the power supply port, and similarly, it is not suitable for cooking that burns (bakes up) a heated object in a short time.

  An object of this invention is to provide the heating cooker which can bake a to-be-heated material like a toast etc. quickly and uniformly, in view of the above prior arts.

A heating cooker according to the present invention supplies a heating chamber for heating an object to be heated, a cover made of a dielectric material provided at the bottom of the heating chamber and sealing a connection opening at the bottom, and microwaves to the heating chamber. In a heating cooker comprising a feeding port having a rotating antenna that
A heater having a higher heat speed than the sheathed heater is arranged on both sides outside the power supply port or on the bottom on the back side of the heating chamber.

  In the cooking device of the present invention, the heater with high heat resistance is arranged on both sides outside the power supply port or at the bottom of the heating chamber, so that the object to be heated can be baked quickly and uniformly like a toast.

It is a cross-sectional front view which shows schematic structure of the heating cooker in Embodiment 1 of this invention. It is a schematic cross-sectional top view which shows the arrangement | positioning relationship between the power feeding opening and lower heater of the heating cooker of FIG. It is a cross-sectional side view of the heating cooker of FIG. It is a cross-sectional front view which shows schematic structure of the heating cooker in Embodiment 2 of this invention. It is a schematic cross-sectional top view which shows the arrangement | positioning relationship between the power feeding opening and lower heater of the heating cooker of FIG. It is a cross-sectional side view of the heating cooker of FIG. It is a cross-sectional front view which shows schematic structure of the heating cooker in Embodiment 3 of this invention. It is a schematic cross-sectional top view which shows the arrangement | positioning relationship between the power feeding opening and lower heater of the heating cooker of FIG. It is a cross-sectional side view of the heating cooker of FIG.

Embodiment 1 FIG.
The heating cooker in Embodiment 1 of this invention is demonstrated based on FIGS. 1-3. FIG. 1 is a cross-sectional front view showing a schematic configuration of the heating cooker according to the first embodiment, FIG. 2 is a schematic cross-sectional top view showing a positional relationship between a power feeding port and the lower heater, and FIG. It is a rough section side view of a heating cooker.
The heating cooker 10 according to the present embodiment includes a heating chamber 2 provided in the main body 1 and a power supply port 3 provided in the center of the bottom of the heating chamber 2 for supplying microwaves to the heating chamber 2. ing. The connection opening of the power supply port 3 provided at the center of the bottom of the heating chamber 2 is sealed with a cover 4 made of a dielectric material (for example, a ceramic plate) so that water, spilled broth or the like does not enter the power supply port 3. It has become. The feeding port 3 is provided with a rotating antenna 5 that is driven to rotate by a motor 6. The microwave generated by the magnetron 7 is guided to the feeding port 3 by a waveguide 8, and the microwave is heated by the rotation of the rotating antenna 5. The chamber 2 is supplied with diffusion in all directions.

  Furthermore, two lower heaters 9 made of, for example, a tube heater are arranged in parallel on both sides outside the power supply port 3, that is, on both the left and right sides of the heating chamber 2. Each lower heater 9 is surrounded by a heat reflecting plate 11 and attached to the bottom surface of the heating chamber 2 made of sheet metal. A tube heater is a quartz glass tube wrapped with a nichrome wire or the like and radiates far-infrared radiant heat, and is a high-heater heater compared to a general sheathed heater. Note that a carbon heater, a halogen heater, or the like may be used as the lower heater 9.

  Also, two upper heaters 12 are arranged in parallel on the top surface of the heating chamber 2. Here, the upper heater 12 is a sheathed heater and is arranged in a cross shape with respect to the lower heater 9 in plan view. The upper heater 12 is also surrounded by the heat reflecting plate 13. The upper heater 12 has a rod shape, but may have a ring shape.

  In the heating cooker 10 configured as described above, when high-frequency heating is performed, the description thereof will be omitted because it is the same as in the prior art, and hereinafter, the electric heating of the object to be heated 100 that is burnt like toast will be described. .

As shown in FIG. 1, a dish receiver 15 is provided on the side surface of the heating chamber 2 and can support a dish such as heat-resistant glass (not shown). Here, for example, two sheets of bread are placed as the object to be heated 100. Heating is started while supporting the wire mesh 20. At this time, the bread is placed on the wire mesh 20 so that the center of the bread is located on the lower heater 9.
When heating is started, the heat generated by the lower heater 9 made of a tube heater is reflected by the heat reflecting plate 11 and heats the bottom plate of the heating chamber 2 thereabove, and the radiant heat from far infrared rays is almost uniformly applied to the lower surface of the bread pan. Radiated. On the other hand, since the temperature in the heating chamber 2 rises due to the heat generated from the upper heater 12, the far-infrared rays of the lower heater 9 quickly evaporate the water inside the bread and baked the front and back surfaces evenly. Therefore, a crisp texture is obtained.

  Thus, since the pipe heater is used for the lower heater 9, the rise in temperature rises quickly, and the toast can be baked quickly and uniformly. Incidentally, the heating time of the toast was about 7 to 8 minutes in the conventional example using the sheathed heater as the lower heater, but about 4 minutes when the tube heater was used for the lower heater 9 of this embodiment. Met.

Embodiment 2. FIG.
4 is a cross-sectional front view showing a schematic configuration of the heating cooker according to the second embodiment, FIG. 5 is a schematic cross-sectional top view showing the arrangement relationship between the power feeding port and the lower heater of the heating cooker, and FIG. It is a rough section side view of a heating cooker.
The second embodiment is different from the first embodiment in that the lower heater 9 is disposed before and after the outside of the power supply port 3, that is, on the front side and the back side on the door (not shown) side with respect to the heating chamber 2. The rest of the configuration is the same as that of the first embodiment, and there are the same effects as described above. However, since the temperature in the back of the heating chamber 2 tends to be higher than that on the front side, control such as reducing the amount of electric power for the lower heater 9 on the back side is necessary.

Embodiment 3 FIG.
FIG. 7 is a cross-sectional front view showing a schematic configuration of the heating cooker according to the third embodiment, FIG. 8 is a schematic cross-sectional top view showing the positional relationship between the power supply opening and the lower heater of the heating cooker, and FIG. It is a rough section side view of a heating cooker.
The third embodiment is different from the first and second embodiments in that one lower heater 9 is arranged at the bottom on the back side of the heating chamber 2 and the power supply port 3 is arranged at the bottom on the front side on the door side.
According to the present embodiment, the temperature on the back side of the heating chamber 2 tends to increase, so that the toast can be baked more quickly.

  Although the case where the toast is baked has been described in the first to third embodiments, the cooking device of the present invention can be widely used for cooking salmon, fish, pizza, gratin and the like.

  DESCRIPTION OF SYMBOLS 1 Main body, 2 Heating chamber, 3 Feed port, 4 Cover, 5 Rotating antenna, 6 Motor, 7 Magnetron, 8 Waveguide, 9 Lower heater, 10 Heating cooker, 11 Heat reflector, 12 Upper heater, 13 Heat reflection Plate, 15 tray holder, 20 wire mesh, 100 object to be heated.

Claims (4)

A heating chamber for heating an object to be heated; a feeding port provided at the bottom of the heating chamber; a cover made of a dielectric material that seals the connection opening at the bottom; and a rotating antenna that supplies microwaves to the heating chamber; In a heating cooker equipped with
A heating cooker characterized in that a heater having a higher heating speed than the sheathed heater is disposed on both sides outside the power supply port or on the bottom on the back side of the heating chamber.   The cooking device according to claim 1, wherein any one of a tube heater, a carbon heater, and a halogen heater is used as the heater.   The cooking device according to claim 1 or 2, wherein the heater is surrounded by a heat reflecting plate.   The cooking device according to any one of claims 1 to 3, wherein an upper heater is disposed on a top surface of the heating chamber.

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