JPH0635890B2 - heating cooker - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cooking device using a halogen lamp.

BACKGROUND ART Heating cookers using halogen lamps are well known. These cooking cookers are safe because they use electricity and do not produce flames or smoke, are efficient because they directly heat pots and frying pans, are clean and easy to clean because they do not produce soot, and have the advantages of a heater system, such as the ability to adjust the temperature steplessly, as well as a fast start-up time, which is an advantage not available with other heaters.

Incidentally, the bottom shape of most cooking appliances is circular, and it is desirable for the heating part of the cooking appliance to be ring-shaped in terms of thermal efficiency, but it is difficult to curve halogen lamps. For this reason, cooking appliances using conventional halogen lamps have multiple halogen lamps lined up in a straight line,
A masking plate is used to form a circular transparent portion on the cooking plate.

However, if the number of halogen lamps in the cooking appliance is small, it is difficult to heat the cooking appliance evenly. On the other hand, if the number of halogen lamps is large, the uneven heating problem can be eliminated, but the cooking appliance becomes very expensive.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a cooking appliance in which the life of the annular halogen lamp is long.

Another object of the present invention is to provide a cooking device in which the light-emitting portion of the halogen lamp can be formed into a substantially circular ring shape.

Disclosure of the Invention The invention that achieves the above object is a cooking device having a halogen lamp provided below a cooking plate as a heat source, and a reflecting member provided so as to surround the outside of the halogen lamp substantially below, wherein the middle portion of the halogen lamp is curved into a substantially circular arc, and both end portions extend substantially tangentially from the arc of the middle portion and intersect with each other within the reflecting member, thereby forming a substantially circular annular portion within the reflecting member, and sealing portions provided on both ends of the halogen lamp are positioned outside the reflecting member, and a light-emitting portion is provided on the annular portion side from the position of the halogen lamp substantially where they intersect.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of the main parts of a cooking device according to one embodiment of the present invention; Figure 2 is a cross-sectional view of the cooking device; Figure 3 is a plan view of a halogen lamp used in a cooking device according to the present invention; Figure 4 is an exploded perspective view showing another embodiment of the present invention; and Figure 5 is a cross-sectional view showing part of the cooking device in an assembled state.

Best Mode for Carrying Out the Invention The present invention will now be described in more detail with reference to the accompanying drawings.

1 and 2 show an embodiment of a cooking device according to the present invention, but for ease of understanding, only the main parts of the cooking device are shown.

1 and 2, reference numeral 1 denotes a cooking plate made of heat-resistant glass or the like, 2 denotes a halogen lamp, and 3 denotes a reflecting member configured as a reflector surrounding the outside of the halogen lamp 2. As clearly shown in Figs. 1 and 3, the middle portion of the halogen lamp 2 is curved in a substantially circular arc shape, and both end portions extend in a substantially tangential direction from the arc of the middle portion and intersect with each other inside the reflector 3, thereby forming a substantially circular annular portion 4 inside the reflector 3. Both ends of the halogen lamp 2, where sealing portions 5 are provided, are positioned to protrude from the reflector 3.

The halogen lamp 2 thus formed has a filament 6, which is the light-emitting portion, on the side of the roughly circular ring-shaped portion 4, i.e., on the intersecting middle portion side. In this example, a notch 3a is formed in the reflector 3, and both ends of the halogen lamp are led out through this notch 3a.

The sealing portion 5 is provided with a molybdenum foil 7, to which an outer lead wire 8 and an inner lead wire 9 are connected. The inner lead wire 9 extends from the molybdenum foil 7 to the filament 6. Reference numeral 10 denotes a sensor that detects the temperature near the surface of the cooking plate 1.

The cooking appliance thus constructed can be kept at a low temperature because the sealing portion 5 of the halogen lamp 2 is outside the reflector 3. At this time, if necessary, a fan or the like can be provided inside the appliance to cool the sealing portion 5 with air. Also, because the crossing position of the halogen lamp 2 is inside the reflector 3 and the filament is provided in the annular portion 4 between the crossings, the halogen lamp 2 is not directly in contact with the cooking plate 1 during use.
The red light that appears above is an almost circular ring, which provides good thermal efficiency and aesthetic appeal.

In the case of a cooking device that simply uses a substantially annular halogen lamp and places its sealing portion inside a reflector,
Radiant heat from the halogen lamp also contributes to heating inside the reflector, and the temperature near the surface of the halogen lamp reaches a high temperature of approximately 700°C to 800°C.

However, the sealing part of a halogen lamp must be kept at 350°C or less, as stipulated by the Japanese Industrial Standards. If the sealing part of the halogen lamp reaches a temperature higher than this, the molybdenum foil is likely to break, and the cooking appliance described above has the problem of a short lifespan of the halogen lamp.

Furthermore, since the cooking device does not have a filament in the sealed portion, the light-emitting portion of the halogen lamp is circular and partially missing, i.e., roughly C-shaped, and is not ring-shaped.

In the present invention, such a problem can be solved by using a halogen lamp 2
This does not occur because the sealing portion 5 of the reflector 3 is outside the reflector 3. Also, since the halogen lamp 2 is provided in the annular portion 4 between the intersections of the filaments 6, the red light appearing on the cooking plate 1 is an approximately circular ring.

4 and 5 are an exploded perspective view and a cross-sectional view showing another embodiment of the present invention.

In Fig. 4, the cooking plate 1 is made of an ultra-heat-resistant glass ceramic plate 11 and a masking plate 12, and is fixed to the case 13 of the cooking device. The reflecting plate 3 has a cylindrical side wall 14,
The central projection 15, the two support arms 16 extending from the central projection 15 to the side wall 14, and the bottom plate 17 are integrally made of a heat insulating material. In this example, the reflector 3 is made by molding ceramic fiber.
The central protrusion 15 is provided with a temperature sensor 10 .

A notch 18 is formed in the side wall 14, and the halogen lamp 2 is supported by the notch 18 and a receiving groove 19 formed in the support arm 16. In this case, the notch 18
After the halogen lamp 2 is placed on the reflector 3, the joining pieces 20 are fitted in, and the joining pieces 20 secure the side walls 1 so that there is almost no gap at both ends of the halogen lamp 2.
It is supported by penetrating through 4.

A circular heat insulating plate 21 is placed under the reflector 3. The heat insulating plate 21 is made of a microporous heat insulating material (product name: Microtherm) whose main components are ultrafine silica particles, ceramic fiber, and an opacifying agent. The combined body of the reflector 3 and heat insulating plate 21 is supported by a dish-shaped support member 22.
The reflector 3 is housed within the container 1, and the receiving member 22 is supported by a bottom cover 24 via a compression spring 23. The compression spring 23 presses the upper surface of the reflector 3 against the cooking plate 1, and the halogen lamp 2 penetrates the side wall 14 with almost no gap, so the interior of the reflector 3 is kept almost airtight.

In a cooking appliance constructed in this manner, the sides and bottom of the reflector 3 are kept airtight with insulating material, so the heat from the halogen lamps 2 generally heats the cooking plate 1, improving thermal efficiency. Furthermore, because heat is much less likely to escape to the outside of the reflector 3, the sealed portion 5 of the halogen lamp 2 is kept at a low temperature, eliminating the need for a cooling means such as blowing air.

Claims (6)

[Claims] [Claim 1] A cooking device having a halogen lamp provided as a heat source below a cooking plate and a reflecting member provided so as to surround the outside of the halogen lamp substantially below, wherein the halogen lamp has a middle portion curved in a substantially arc shape,
The heating cooker is characterized in that the end portions are extended in a substantially tangential direction from the arc of the middle portion and intersect with each other within the reflecting member to form a substantially circular ring-shaped portion within the reflecting member, the sealing portions provided on both ends of the halogen lamp are positioned outside the reflecting member, and a light-emitting portion is provided on the ring-shaped portion side from the position where the halogen lamps intersect. [Claim 2] A heating cooker as described in claim 1, characterized in that the reflective member has a cylindrical side wall and a bottom plate that covers the bottom of the side wall, and the side wall and bottom plate are integrally molded from an insulating material. 3. The heating cooker according to claim 2, wherein both sides of the halogen lamp penetrate through the side wall of the reflecting member with almost no gap between them. 4. The cooking device according to claim 2, wherein at least one support portion for supporting the annular portion of the halogen lamp on the reflecting member is integrally formed with the side wall and the bottom plate. 5. The cooking device according to claim 2, wherein an insulating plate made of a heat insulating material having a microporous structure is placed under the reflecting member. [Claim 6] A heating cooker as described in claim 2, characterized in that a receiving member is provided to receive the stack of the reflective member and the insulating plate, the receiving member is supported on the heating cooker body via a spring, and the upper surface of the reflective member is pressed against the cooking plate by the elastic force of the spring.