JP2666356B2 - Cooking device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooker that is used in a general household or the like, has an induction heating source, and performs cooking by placing an object to be cooked in a pot.

2. Description of the Related Art Generally, as a cooking device provided with an induction heating source and cooking an object to be cooked in a pot, as shown in Japanese Utility Model Application Laid-Open No. 53-164964, for example, as shown in FIG. Structures are known. That is, in FIG.
Is a cylindrical outer case whose upper and lower surfaces are open.
A bottom plate 103 having a support leg 102 is fixed to the lower surface of 1 by screwing. Reference numeral 104 denotes a pot storage portion formed of, for example, heat-resistant plastic.
The flange 104a provided at the upper end thereof is fixed to the outer case 101 by screwing on the upper surface. Reference numeral 105 denotes a first induction coil embedded in the side surface portion 104b of the pan storage portion 104 by integral molding, and reference numeral 106 denotes a second induction coil embedded in the bottom surface portion 104c of the pan storage portion 104 by integral molding. 107
Is a pot made of a magnetic material, for example, iron.
107 is detachably mounted on the bottom surface portion 104c of the pan storage unit 104. Reference numeral 108 denotes a thermostat, for example, which is fixed through a support plate 109 in a through hole 104d provided at the center of the bottom portion 104c of the pan storage portion 104.
The eight heat-sensitive portions 108a are urged upward by a spring (not shown) so as to be in close contact with the bottom portion 107b of the pan 107. 1
Reference numeral 10 denotes a temperature detection switch for detecting the temperature of the side surface portion 107a of the pot 107, for example, having a heat-sensitive portion 110a such as a temperature fuse. The heat-sensitive portion 110a of the temperature detection switch 110 Insertion hole 111 provided in portion 104b
And is always inserted into the pot 1 by the spring 112.
It is urged in the direction of 07, and the front end of the heat-sensitive portion 110a is pressed against the side surface 107a of the pan 107. Reference numeral 113 denotes a lid having a knob 114. The lid 113 is removably mounted on the flange 104a of the pan storage unit 104. Reference numeral 115 denotes a control board fixed to the upper surface of the bottom plate 103, and a part of an electric circuit is provided.

Problems to be Solved by the Invention In the above-mentioned conventional cooking device, the heat-sensitive part 11
Because 0a protrudes from the inner surface of the pan storage unit 104, the protruding heat-sensitive part 110a becomes an obstruction when the pan 107 is put in and out, and because the heat-sensitive part 110a protrudes inward, it is affected by magnetic flux. Will cause self-heating, which will cause
There was a problem that the temperature of 107 could not be accurately captured.

The present invention is to solve the above-mentioned conventional problems, and to provide a cooker that is hardly affected by magnetic flux, can accurately capture a rise in the temperature of the pan in the event of an abnormality, and can easily put the pan in and out. It is intended for.

Means for Solving the Problems In order to solve the above-mentioned problems, a cooking device of the present invention is configured such that an induction coil is tightly wound inside a protective frame bottom made of a non-metallic material constituting a protective frame in which a pan is detachably stored. The thermal fuse is provided at the bottom of the protective frame between the inner and outer densely wound portions. The thermal fuse mounting portion at the bottom of the protective frame is formed in a concave shape, and the thermal fuse is fixed so that the lower side is covered with a fixture made of a nonmetallic material.

Operation According to the above configuration, the temperature fuse is provided at the bottom of the protective frame at a position opposite to the bottom where the temperature of the pot is sharply increased at the time of abnormal temperature rise due to a circuit failure or the like. Sometimes the thermal fuse can be operated quickly. Also, the thermal fuse mounting part at the bottom of the protective frame is formed in a concave shape and the thickness is thin, so that heat from the pot is good, and the lower side of the thermal fuse is covered with a fixture made of non-metallic material. Therefore, heat from below can be shut off, whereby the detection of the temperature of the pot becomes reliable and safety can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a cooker according to an embodiment of the present invention, and FIG. 2 is a sectional perspective view of a thermal fuse mounting portion in the cooker. In FIGS. 1 and 2, a protective frame bottom 3a made of a non-metallic material and a metallic material constitute a protective frame 3 in which a pot 2 is detachably housed inside a substantially cylindrical cooker body 1. The protective frame side portion 3b is disposed, and the upper frame 5 is disposed above the protective frame side portion 3b. The pot 2 is made of, for example, a clad steel plate having an outer surface made of a magnetic material, and is supported by placing an upper end flange 6 on the upper frame 5. The induction coil 7 is provided on the outer surface of the protective frame bottom 3a so as to face the bottom of the pot 2 and have the inner densely wound portion 7a.
And the outer densely wound portion 7b, and is held between the protective frame cover 8 screwed to the protective frame bottom 3a. A ferrite 9 is attached to the outer surface of the protective frame cover 8 to enhance inductive coupling and to provide magnetic shielding to the outside. Further, for example, a heater A1 which is insulated multiple times is provided on the protection frame side portion 3b.
0 is pasted. Further, a concave portion 4 is provided on the outer surface of the protective frame bottom portion 3a located between the inner densely wound portion 7a and the outer densely wound portion 7b of the induction coil 7, and a heat-sensitive device which cuts off the circuit when an abnormal temperature rises A thermal fuse 11, which is an operating body, is attached so as to cover a lower surface of the thermal fuse 11 with a fixture 12 made of a nonmetallic material.

On the upper part of the upper frame 5 of the cooker 1, a resin lid 13 is supported via a pin 15 by a hinge part 14 integrally formed with the upper frame 5 so as to be openable and closable. Handle on top of lid 13
16 is provided, and an inner cover 17 is fixed to the inner surface via a heat insulating material 18. An engaging portion 19 is integrally formed on a portion of the upper frame 5 opposite to the hinge portion 14, and an engaging lever 20 is rotatable on the lid 13 via a pin 21 in opposition to the engaging portion 19. When the lid 13 is closed, the engagement lever 20 is engaged with the engagement portion 19 by being urged by a spring 22. Lid
The opening of the cover 13 is performed by operating the button 23 attached to the engagement lever 20. A support pin 24 protrudes from the lower surface of the inner cover 17 located on the lower surface of the lid 13, and this support pin
An inner lid 25 is attached to the top 24 so as to be vertically movable, and is constantly urged downward by a packing 26 so that the lid 2 can be pressed against the pan 2 when the lid 13 is closed so that the pan 2 can be closed. Also the inner cover 17
For example, a heater B27 which is coated and insulated is affixed to the upper surface of the cooker main body 1, and its lead wire is connected to an electric circuit (not shown) provided in the cooker main body 1 via the hinge portion 14.

The temperature of the pan 2 is sensed by the contact 28 in thermal contact with a thermistor (not shown) being urged by a sensor spring 29 to contact the bottom of the pan 2. The temperature information sensed by the thermistor is transmitted to an electric circuit (not shown) to control the power of the induction coil 7, the heater A10 and the heater B27.

In the cooker having the above-described structure, when an abnormal temperature rise due to a circuit failure or the like occurs as described above, the thermal fuse 11 operates to cut off the circuit.
Is located between the inner closely-wound portion 7a and the outer closely-wound portion 7b of the induction coil 7, so that it is hardly affected by the magnetic flux. It is provided on the protection frame bottom 3a at the position opposite to the protection frame bottom 3a.
A recess 4 is provided in 3a, and the thickness of the
Temperature fuse 11 when abnormal temperature rises.
Works quickly. In addition, since the lower side of the thermal fuse 11 is covered with the fixing member 12 made of a nonmetallic material, the thermal fuse 11 is less susceptible to heat from below. As a result, the thermal fuse 11 can more accurately catch the abnormal temperature rise of the pan 2. Because it can be done, its safety is improved.

Effect of the Invention As is clear from the description of the above embodiment, the cooking device of the present invention has an induction coil on the inner tightly wound portion at the bottom of the protective frame made of a non-metallic material constituting the protective frame detachably stored in the pan. And the outer densely wound part is provided, and the thermal fuse is provided at the bottom of the protective frame located between the inner densely wound part and the outer densely wound part. At the same time, when the abnormal temperature rises, the thermal fuse can be quickly operated. Further, since the thickness of the thermal fuse mounting portion at the bottom of the protective frame is made concave so as to reduce the thickness, heat transfer from the pan is also good, and the abnormal temperature of the pan can be more sensitively sensed. Further, since the lower side of the thermal fuse is covered with the fixture made of a non-metallic material, it is hardly affected by the temperature other than the temperature of the pot, so that its safety can be further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a cooker showing one embodiment of the present invention, and FIG.
The figure is a cross-sectional perspective view of the thermal fuse mounting part of the cooker, and FIG.
The figure is a sectional view showing a conventional cooking device. DESCRIPTION OF SYMBOLS 1 ... Cooker main body, 2 ... Pot, 3 ... Protective frame, 3a ... Protective frame bottom part, 4 ... Depression, 7 ... Induction coil, 7a ... Inner tightly wound part, 7b ... Outside tightly wound Section, 11 ... Thermal fuse, 12 ...
…Fixture.

Claims (3)

(57) [Claims] 1. A non-metallic material comprising a cooking device main body, a protection frame disposed inside the cooking device main body, and a pan removably stored in the protection frame. At the bottom of the protective frame, an induction coil was divided into an inner densely wound portion and an outer densely wound portion, and a thermal fuse was provided between the inner closely wound portion and the outer densely wound portion at the bottom of the protective frame. Cooking device. 2. The cooker according to claim 1, wherein the thermal fuse mounting portion at the bottom of the protective frame is formed in a concave shape. 3. The cooker according to claim 1, wherein the thermal fuse is fixed so as to cover the lower side with a fixture made of a nonmetallic material.