JPS6261291A - Attachment for induction heating cooking device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an attachment for an induction cooker by applying the induction heating principle. 3. Prior Art Conventional induction cooker C1 Heating a metal container pot to +44 It is only used for heating, and the heating fit can be controlled only by adjusting the output of the cooker itself.
・＼- Load status detection 1 Old/((1) Small object load detection and (2) Temperature detection are performed on the main body (n!l). Heating is controlled according to the detection output. Particularly regarding temperature detection, a structure is adopted in which the temperature of the load is detected through a large plate for the purpose of water safety and the like.

However, with this type of structure, the temperature of the heated object (pan) is constantly detected by contact, so the temperature detection accuracy is poor, so it cannot be used for dry cooking. However, the problem is that the overheating protection is slow to operate, leading to deformation of the pot. , 4. If you want to temporarily interrupt heating, the only way is to turn off the power switch of the main unit, but in that case, cooling of the internal parts 11
Since every single fan stops, there is also the problem that the heat from the high-temperature pot causes the temperature of internal parts to rise unnecessarily.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to solve the above-mentioned problems by independently controlling high-precision temperature control and heating by using an attachment for an induction heating cooker that is heated by an induction heating cooker.

Means for solving the problem 3 ・＼-2 To solve the problem, the technical means of the invention is to install a shield closer to the heating coil than the heated metal plate of the attachment A coil is arranged and a switch means is provided to connect and disconnect the terminal end of the coil.The action of this technical means is as follows. Since the shield coil is left open, only an induced voltage is generated, no eddy current is generated, and there is no power consumption.The alternating magnetic field from the heating coil reaches the metal plate through 11 sheet/lt coils. On the other hand, when the switch means is on, the shield coil is not closed, so an eddy current flows according to the magnetic flux of the heating coil. Since there is no power consumption, it has the same shielding effect as a rolled plate, slows down the magnetic flux to the metal plate and prevents heating, and also keeps the heating coil of the main body in the same state as the no-load state (no power consumption occurs, so the no-load state is the same). ), and the heating operation of the main body can also be stopped. As a result, the attachment V (fjiii gura f17
By intermittent operation of the heating means, the main body 6 is operated and 4: the heating [i] is adjusted throughout the day. +, An embodiment of the invention is also shown in the accompanying drawings with a t for explanation.

1.1.
゛Then, open 1-1 part V (- 5if part 24 and 1.) and surround the metal inner container 36, and place 1 object to be heated 4 in the inner container 3. There is a shield between the bottom of the inner container 3 and the container 1, or an induction heating cooking H:99 frequency converter 8 pil J,
The heating coil Y is excited at its position Q-[5, which is located between the heating coil 7 and the inner container 3, which is the object to be heated, and the shield coil 5]. terminal Q-1 (connected to switch 6)1. '7, when the contact of switch 6 is closed 2, the shield coil 5C1 is shorted.
Ill. If the switch 6 is open, the shield coil 5 will have v1 eddy current tΔul, and the electromagnetic regulator 9 (
7) Hanging magnetic stomach (-
11,6, - Shield coil 6・1! Through L7 to the bottom of the inner container 3 -
\ Reach and heat. On the other hand, when the switch 6 is closed t7, an eddy current flows in the shield coil 5 according to the alternating magnetic field.
I, the resulting magnetic field Wv', the alternating magnetic field W from the heating coil 7
In order to offset this and make the magnetic field to the inner container 3 zero, the inner container 3
Heating of kt is prevented. In this way, heating of the inner container 3 can be controlled by opening and closing the terminals of the shield coil 5.

FIG. 2 shows another embodiment, in which the terminals of the shield coil 6 are opened and closed by a relay contact 6, and the terminals of the coil 6 are open while the inner container 3 is being heated. Therefore, the voltage at both ends is rectified and smoothed by a DC smoothing circuit including a diode 20° resistor 21 and a smoothing capacitor 22, and is used as a power source for the following circuit. At both ends of content 22, t! A known relaxation oscillation circuit 23 consisting of an E resistor 25, a capacitor 26, and a comparator 24 is connected to a second comparator 24, a resistor 25, and a variable resistor 27.
is applying the reference potential to the second comparator 24,
The output of the 1-form wave has a relative significance with the oscillation voltage of the relaxation oscillation circuit 23 as the output of the second comparator?! Coil 6' is connected at Jl τ
Relay contact 6rY cycle 1υ1 turns on and off, 11 sheep-
), the shield coil 6 also controls the heating power of the inner container 3-\ according to the on-off ratio 1~, y and j~. 'iJ
By changing the ILt resistance value of JM:27, the reference voltage of the comparator 24 changes, and the streetcar ratio of the relay coil 6a changes. All white W 't!"j "\ can be supplied.

, here, the power consumption c1 of the circuit is very small, so even if the #J energy of the circuit is increased from the terminal voltage of the Nord coil 5, it will hardly affect the heating type υ to the inner container. t7 It's not worth it.

In the third embodiment, as shown in FIG.
..., the contact 6 iJ, opens when the set iA degree is reached, and closes when it exceeds the temperature 5, second, when the temperature of the inner container 3 falls below the set temperature tm-, the contact opens. 6 Open 7・\-7 Induction heat the inner container 1, Set 5:? When the temperature reaches 4 degrees, contact 6 closes and heating is stopped, making it possible to automatically adjust the temperature. Here, 71 can be set at an arbitrary temperature using a variable-temperature-setting type fan. Here, we have explained the thermostat with the simplest structure as an example, but since the thermostat has the disadvantage that the temperature [IJ] at the time of on/off is high, we replaced the thermostat with a combination circuit of a Yarmister, an electronic control circuit, and a relay. (not shown) 1': It is clear that more accurate temperature control can be achieved. 5. Effects of the Invention The present invention provides a shield coil at the bottom of the heated part (between the heating coil) By turning on and off the terminal, the power supplied to the attachment can be controlled without operating the induction heating cooker main body, and the following effects are achieved.

(1) The output can be adjusted independently of the attachment.

For example, for simmering, delicate settings can be made only in the low output range (for example, 50" to 150"), (2)
Incorporating the temperature sensor into the attachment: 1. ) allows for high-precision temperature control, and 2 is also cordless.
, (3) Connect the power supply 1゛ power-off circuit for the 7'-root coil or C].
f + moving is also m' rjE, complicated and high 1
1. It is possible to control the degree of control (for example, a cordless jar rice cooker). 4. Is the drawing simple? Figure 1 is a configuration diagram of an attachment for an induction heating cooker according to an embodiment of the present invention, and Figure 2 is a diagram showing an attachment for an induction heating cooker according to a second embodiment of the present invention. FIG. 3 is a block diagram of an attachment for an induction heating cooker according to a third embodiment of the present invention.

3 ・Metal container to be heated, 5 ・Shield coil, 6...
- Switch means, 7 heating coil.

Claims (2)

[Claims] (1) A metal plate to be heated that faces the heating coil and heats the object to be heated, a shield coil disposed on the side of the heating coil from the metal plate to be heated, and a switch means for opening and closing the terminal end of the shield coil. Attachment for induction heating cooker. (2) The attachment for an induction heating cooker according to claim 1, wherein the switch means is a temperature-sensitive switch means.