JPH0113198B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a heat generating device for an electromagnetic cooker, and even when cooking utensils such as pots and kettles are made of non-magnetic material, It is used to allow heating by an induction cooker only when the temperature is high.

Prior Art In an electromagnetic cooker, countless eddy currents are generated by electromagnetic induction in the bottom plate of a magnetic cookware placed on a top plate, and the heat generated by these eddy currents causes the food to be cooked inside the cookware to It is used to heat. Therefore, the materials that can be used for cooking utensils are essentially limited to iron-based magnetic materials and some stainless steel; non-magnetic materials based on aluminum, copper, ceramics, etc. cannot be used. Nakatsuta.

In addition, the top plate of the electromagnetic cooker can be heated to 250℃.
When the cooking utensil is heated back and forth, an abnormal temperature rise prevention device installed inside the utensil works and automatically cuts off the power to the induction heating coil. This is limited to simmered and fried foods that contain liquids such as liquids that can keep the temperature rise of the top plate below 250℃, and this is a major cause of hindering the spread of induction cooktops, along with the material limitations of the cooking utensils mentioned above. I was getting used to it.

Problems to be Solved by the Invention This invention makes it possible to use cooking utensils such as non-magnetic pots, which cannot be used in an induction cooker because they do not have an electromagnetic induction effect, in an electromagnetic cooker. Considering that the action does not work on magnetic materials that are more than a certain distance away from the top surface of the top plate, for example 12 to 19 mm (depending on the manufacturer), the magnetic heating element is moved up and down, and the magnetic heating element is moved up and down. This was an attempt to solve the problem by keeping the temperature rise low when the plate is kept away from the top surface of the plate so that various dishes can be cooked safely and thermally efficiently.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a heat generating device for an electromagnetic cooker, in which a magnetic heating element or a non-magnetic holding member that holds the magnetic heating element has a plurality of outwardly bent pieces. The swinging leg is swingably attached, and a weight for moving the heating element upward is provided at the lower end of the swinging leg.

Operation When a cooking utensil is placed on top of the heating device, the magnetic heating element, which had been held at a non-electromagnetic induction height of the electromagnetic cooker by the weight for moving the heating element fixed to the swinging leg, moves to the height of the above weight. It is lowered to a height position that allows electromagnetic induction against the upward movement and generates heat. Therefore, the heat generating device allows non-magnetic cooking utensils to be heated with an electromagnetic cooker. Since there is a space between the magnetic heating element and the upper surface of the top plate even when it is generating heat, the temperature rise of the top plate can be kept low. Further, when the cooking utensil is lowered, the magnetic heating element is returned to its original non-electromagnetic induction height by the upward movement of the weight, so that the electromagnetic induction effect of the electromagnetic cooker is automatically interrupted.

Embodiment FIGS. 1 to 4 show a first embodiment of the present invention, in which a magnetic heating element 1 by electromagnetic induction is formed around a large circular protrusion 1a at the center. On the mounting member 2 on the lower surface of the annular recess 1b, a pair of swinging legs 3 on the left and right sides are provided, each for holding the upper surface of the circular protrusion 1a at a non-electromagnetic induction height where heat is not generated by the electromagnetic induction action of the electromagnetic cooker A. Mounted so that it can swing. Each pair of swing legs 3
are similarly inclined diagonally downward toward the outside from the mounting member 2, and the bottom wall 4a curved toward the outside is flat at the tip of each horizontal portion 3a formed at the lower end thereof. They are connected by a weight 4 for moving the heating element upward. This weight 4
The weight of the magnetic heating element 1 is determined by the magnitude of the moment of the weight 4 with respect to the mounting part of the swing leg 3 when the heating device is placed on the top plate B of the electromagnetic cooker A (Fig. 1). The cooker A is held at a non-inductive height, but the cooker C is placed above the magnetic heating element 1.
When placed (FIG. 4), the circular protrusion 1a of the magnetic heating element 1 is lowered to a height where it is affected by the electromagnetic induction of the electromagnetic cooker A against the upward movement of the weight 4. determined.

The magnetic heating element 1 is made of a three-layered cladding consisting of thin stainless steel plates of approximately 0.1 mm in thickness bonded to both sides of an iron plate of approximately 1 mm in thickness. Although the applicant has discovered that it exhibits excellent heat generation performance, iron plates and other magnetic materials can of course also be used. For the magnetic heating element 1 having each of the above configurations, if at least the exposed portion of the iron plate is covered with a heat-resistant non-rusting material such as aluminum plating or enamel, the magnetic heating element 1 can be heated to a high temperature by electromagnetic induction. can prevent oxidation and extend its life.

The mounting member 2, the swinging legs 3, and the weight 4 for moving the heating element upward are generally made of non-magnetic and non-rusting metal materials, but they may also be made of non-metallic materials. When it is desired to reduce the conduction of heat from the heating element 1, a material that is a poor conductor of heat may be used.

In FIGS. 1 to 4, the weight 4 is curved outward as shown in FIG. 2 in order to be able to place as large a cookware C as possible on the magnetic heating element 1. The same objective can be achieved by increasing the length of the horizontal portion 3a of the swing leg 3, which is bent without being curved. Furthermore, if a heat-resistant shock absorbing member such as Teflon is fixed to the bottom wall 4a of the weight 4, the impact of the weight 4 on the top plate B when lowering the cooking utensil C from above the magnetic heating element 1 can be reduced. useful for.

In the above-described embodiment, the number of swing legs 3 and the mounting positions may be changed freely, and the shape may be curved instead of bent.

When the heat generating device with the above configuration is placed on the electromagnetic cooking device A, the magnetic heating element 1 is activated by the upward movement of the weight 4 fixed to the tip of the swinging leg 3, as shown in FIG. It is held at a height where the electromagnetic induction effect of device A does not reach. In this state, when the switch of the electromagnetic cooker A is turned on and the cooking utensil C is placed on the magnetic heating element 1, the magnetic heating element 1 resists the upward movement of the weight 4 due to the weight of the cooking utensil C. The mounting member 2 is lowered to a height where it can receive electromagnetic induction, and is held at a height position where the mounting member 2 contacts the top plate B (FIG. 4).

Therefore, even if the cooking utensil C placed on the magnetic heating element 1 is made of a non-magnetic material, the magnetic heating element 1 generates heat due to the electromagnetic induction action of the electromagnetic cooker A. Therefore, heating can be ensured.

In this case, the magnetic heating element 1 that heats the cooking utensil C
The mounting member 2 and the swinging legs 3 allow the electromagnetic cooker A
Since it faces the top plate B of the electromagnetic cooker A through space, the temperature rise of the top plate B can be kept low compared to the conventional case where a magnetic cookware comes into direct contact with the top plate. You can increase the variety of dishes you can cook and extend the cooking time.

After cooking is finished, when the cooking utensil C is lowered from above the magnetic heating element 1, the magnetic heating element 1 is rotated by the swinging leg 3, which is rotated by the upper movement of the weight 4, and the magnetic heating element 1 is moved back to its original state, which cannot be electromagnetically induced. Safety during handling is also increased because the heating effect is automatically stopped upon returning to the height.

FIG. 5 shows a second embodiment of the present invention, in which a magnetic plate 5 of a certain size, for example, 30 mm or more in diameter, is placed below the center of the back surface of the magnetic heating element 1, and a cooking utensil C is placed thereon. This is a case in which the electromagnetic cooker A is installed at a height that allows electromagnetic induction in the placed state.

When the heat generating device is configured as described above, even in the electromagnetic cooker A where the height at which electromagnetic induction is possible is small,
By increasing the height of electromagnetic induction, the temperature rise of the top plate B can be suppressed to a low level, and the same effects as described in the previous embodiment can be achieved.

FIG. 6 shows a third embodiment of the present invention, in which a heat insulating material 6 is arranged on the back side of the circular protrusion 1a of the magnetic heating element 1, and is fixed to the magnetic heating element 1 or the mounting member 2. This is a case where it is held by a holding piece 7 that is attached.

When the heat generating device is configured as described above, the top plate B is raised by the magnetic heating element 1 even when the electromagnetic cooking device A has a small height for electromagnetic induction or the heating capacity of the magnetic heating element 1 is large. You can keep the temperature low and cook continuously for a long time.

7 and 8, unlike the above-mentioned embodiments, the magnetic heating element 1 is held by a holding member 8 made of a non-magnetic material, such as aluminum die-casting, provided with an opening 9. This is a case where the swinging legs 3, which are bent or curved outward, are attached so as to be able to sing. If it is desired to keep the temperature rise of the top plate B low, the holding member 8 may be made of a non-magnetic material that is a poor conductor of heat.

When the heating device is configured as described above, the stability of the cooking utensil C placed on the magnetic heating element 1 is improved, and the swinging legs 3 can be easily attached, thereby achieving the same effect as described in the first embodiment. effect can be achieved.

Effect of the Invention This invention attaches a swinging leg to a magnetic heating element or a non-magnetic holding member that holds it, and uses a weight fixed to the tip of the swinging leg to move the magnetic heating element into an electromagnetic cooker. Since it is designed to be able to move between heights that allow electromagnetic induction and heights that cannot, the heat generation effect of the magnetic heating element can also be applied to non-magnetic cooking utensils held through a space between the top plate and the top plate. This makes it possible to heat the top plate while keeping the temperature rise low, and by lowering the cooking utensil, the heating action of the magnetic heating element is stopped, improving safety during handling. Furthermore, since the configuration is extremely simple, a device that operates reliably and does not cause trouble can be provided at a low cost.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention;
Figure 2 is a plan view of the heat generating device in Figure 1;
The figure is a right side view of Fig. 1, Fig. 4 is a longitudinal cross-sectional view showing the state in use with the cooking utensil placed in Fig. 1, and Fig. 5 is a right side view of Fig. 1.
6 and 6 are longitudinal cross-sectional views of other different embodiments, FIG. 7 is a plan view of yet another different embodiment, and FIG. 8 is a cross-sectional view of FIG. 7. DESCRIPTION OF SYMBOLS 1... Magnetic heating element, 3... Rocking leg, 4... Weight for upward movement of heating element, 5... Magnetic plate, 9... Non-magnetic holding member, A... Electromagnetic cooker, C... Cooking utensil.

Claims (1)

[Claims] 1. A plurality of swinging legs bent outward are swingably attached to a magnetic heating element or a non-magnetic holding member that holds it, and the lower tip of the swinging legs is A heat generating device for an electromagnetic cooker, characterized in that a weight is provided for moving the heating element upward. 2. The heating device for an electromagnetic cooker according to claim 1, wherein the magnetic heating element has a three-layer structure in which both sides of an iron plate are crimped with thin stainless steel plates. 3. The heat generating device for an electromagnetic cooker according to claim 1, wherein the swinging leg has a lower end portion which is inclined outwardly and bent outwardly in a horizontal direction. 4. The heat generating device for an electromagnetic cooker according to claim 1, wherein the swinging legs are curved outward. 5. Claims 1 and 2, in which a pair of swinging legs are provided at opposing positions of the magnetic heating element or its holding member, and each pair of swinging legs is connected by a weight for moving the heating element upward. Section 3, Section 4
The heat generating device for an electromagnetic cooker according to any one of paragraphs. 6. The heat generating device for an electromagnetic cooker according to claim 5, wherein the weight is a non-rusting metal plate and is curved outward. 7. Claim 1, wherein the holding member is a poor conductor of heat and is provided with an opening for mounting a magnetic heating element.
A heat generating device for an electromagnetic cooker as described in . 8. The magnetic heating element has a magnetic plate of a certain size below the center of the back surface that is lowered to a height position where electromagnetic induction is possible only when a cooking utensil is placed on the electromagnetic cooker. The heat generating device for an electromagnetic cooker according to any one of Item 1, Item 5, and Item 6.