JP2000184963A

JP2000184963A - Heating cooker

Info

Publication number: JP2000184963A
Application number: JP36709798A
Authority: JP
Inventors: Hideji Abe; Katsunori Zaizen; 秀二安倍; 克徳財前
Original assignee: Matsushita Electric Ind Co Ltd; 松下電器産業株式会社
Priority date: 1998-12-24
Filing date: 1998-12-24
Publication date: 2000-07-04

Abstract

PROBLEM TO BE SOLVED: To easily execute cooking by connecting a heating coil to a high frequency inverter circuit, induction-heating a cooking pot through the use of the heating coil and driving it by attaching an ultrasonic vibrator transducer in the bottom part of the cooking pot. SOLUTION: The heating coil 2 is connected to the inverter circuit 1 for generating an AD power source voltage with a frequency being different from that in a commercial power source from the commercial power source, which is arranged inside a case 8 on which the cooking pot 3 is put. Besides, the ultrasonic vibrator transducer 4 is attached to the bottom part of the pot 3 and a driving circuit 5 for driving the transducer 4 is arranged. Then the heating coil 2 and the transducer 4 are connected to the inverter circuit 1 where the function of the circuit 5 is integrated and the ultrasonic wave irradiation of the transducer 4 and heating are alternately or simultaneously executed. Thus, an object to be cooked is not burnt by the slight vibration of ultrasonic wave and cooking is easily executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heating cooker used in ordinary households.

[0002]

2. Description of the Related Art In recent years, induction heating cookers have become widespread as electric heating cookers. The electric type has the advantages that it is safe without using a fire and the heat power can be easily adjusted. By taking advantage of this advantage, it is convenient to easily cook boiled beans and small fish.

[0003] Further, the induction heating type cooker has the advantage that the cooking pot is directly heated by the eddy current generated by the electromagnetic induction and the eddy current due to the electromagnetic induction, so that the heating power is strong and the efficiency is high.

[0004]

However, in the above-mentioned conventional electric heating cooker, there remains a first problem that the sear is apt to burn when a long-time stew is performed.

[0005] The second problem is that the means for solving the first problem must be inexpensive because it is a cooking appliance used at home.

A third problem with respect to the above-mentioned first and second problems is that it is necessary to effectively act on high-viscosity foods such as curries and stews.

[0007] The present invention has been devised to solve the above-described problems, and provides a heating cooker that can perform cooking more easily.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a high frequency inverter circuit, a heating coil connected to the inverter circuit, a cooking pot induction-heated by the heating coil, and It comprises an ultrasonic vibrator attached to the bottom of the cooking pot, and a drive circuit for driving the ultrasonic vibrator.

The second means of the present invention is that a heating coil and an ultrasonic vibrator are connected to an inverter circuit integrated with the function of a drive circuit, and ultrasonic irradiation and heating are performed alternately or simultaneously. Is provided.

According to a third aspect of the present invention, there is provided a heating cooker according to claim 1, wherein a plurality of oscillating units are provided in the drive circuit, and the ultrasonic vibrator is sequentially driven at a plurality of frequencies. Things.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a high frequency inverter circuit, a heating coil connected to the inverter circuit, a cooking pot induction-heated by the heating coil, and a bottom portion of the cooking pot. An ultrasonic vibrator attached to the device and a drive circuit for driving the ultrasonic vibrator can be cooked more easily.

According to a second aspect of the present invention, a heating coil and an ultrasonic vibrator are connected to an inverter circuit having an integrated drive circuit function, and ultrasonic irradiation and heating are performed alternately or simultaneously. Since the food is stirred slowly while being heated by the heating cooker, the food is cooked more uniformly and in a shorter time.

According to a third aspect of the present invention, the drive circuit is provided with a plurality of oscillating units, and the ultrasonic vibrator is sequentially driven at a plurality of frequencies to stir the cooker. It works as follows.

[0014]

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 denotes a cooking pot having an insulating structure, and reference numeral 2 denotes a main body on which the cooking pot 1 is placed. 3 is the main body 2
An inverter circuit 4 for generating an AC power supply voltage having a frequency different from that of the commercial power supply from a commercial power supply installed inside is a heating coil 4 connected to the inverter circuit 3.

Reference numeral 5 denotes a heating element affixed to the bottom inside the cooking pot 1 and subjected to induction heating by the heating coil 4. Reference numeral 6 denotes a weight for adjusting the amount of water vapor emitted from the cooking pot 1, and reference numeral 7 denotes a safety device provided in the cooking pot 1.

In the above configuration, the operation of the first means of the present invention will be described. The heating coil 4 generates a high-frequency magnetic field when supplied with the high-frequency current generated by the inverter circuit 3 described above. Upon receiving the high-frequency magnetic field, the heating element 5 provided in the cooking pot 1 having the heat insulation structure generates heat and is cooked.

As described above, in this embodiment, cooked foods, particularly brown rice, fish bones, shin meat, dried beans, etc. can be boiled softly in a very short time. In addition, since the cooking pot 1 has a heat insulating structure, the applied heat is hardly dissipated to the outside of the cooking pot 1, so that it becomes possible to reach a high temperature in a shorter time than before, and vitamins lost during cooking are also reduced. Less. Further, once the inside of the cooking pot 1 is heated to a high temperature and a high pressure, even if the inverter circuit 3 is stopped and the heating of the heating element 5 by the heating coil 4 is stopped, the inside of the cooking pot 1 is heated to a high temperature due to the above-mentioned heat insulating effect. Since the high pressure is maintained, the cooking is continued (insulated heat keeping cooking), and the electricity bill can be further reduced.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIG.

Reference numeral 21 denotes a cooking pot made of a non-magnetic material such as glass or resin, and 22 denotes a main body on which the cooking pot 21 is placed. Reference numeral 23 denotes a first inverter circuit for generating an AC power supply voltage having a frequency different from that of the commercial power supply from a commercial power supply installed in the main body 22, and 24 denotes a first inverter circuit 2
3 is a heating coil. Numeral 25 is an ultrasonic vibration generating means which comprises a winding and a magnetic core, which will be described later, and generates ultrasonic vibration, and 26 is a second inverter which supplies a predetermined current to the ultrasonic vibration generating means. 27
Is a heating element affixed to the bottom inside the cooking pot 1 and subjected to induction heating by the heating coil 4. A torque 28 is generated by the ultrasonic vibration from the ultrasonic vibration generating means 25. The second inverter circuit 26 should ideally be provided with a detection element, and should be controlled so that the generated ultrasonic vibration appropriately follows the position of the magnetic pole. The operation of the second means of the present invention will be described. The high frequency current generated by the above-described inverter circuit 23 is supplied, and the heating coil 24 generates a high frequency magnetic field. Upon receiving the high-frequency magnetic field, the heating element 27 provided in the cooking pot 21 generates heat, and the food is cooked and slowly stirred as described in the first embodiment.

As described above, in this embodiment, cooked foods, particularly brown rice, dried beans, curry / stew, soup, and the like can be boiled softly and uniformly in a very short time.

Embodiment 3 Next, a third embodiment of the present invention will be described with reference to FIG.

Reference numeral 41 denotes a cooking pot made of a nonmagnetic material such as glass or resin, and reference numeral 42 denotes a main body on which the cooking pot 41 is placed. Reference numeral 43 denotes a first inverter circuit for generating an AC power supply voltage having a frequency different from that of the commercial power supply from a commercial power supply installed inside the main body 42, and 44 denotes a first inverter circuit 2
3 is a heating coil. 45 is a heating coil 4
Reference numeral 4 denotes a magnetic body for reducing an unnecessary magnetic field, 46 denotes a winding, and 47 denotes a magnetic core. The winding 46 and the magnetic body 47 constitute an ultrasonic vibration generating means 48. A second inverter 49 supplies a predetermined current to the ultrasonic vibration generating means 48.

Reference numeral 27 denotes a heating element affixed to the bottom inside the cooking pot 1 and subjected to induction heating by the heating coil 4. 2
Reference numeral 8 denotes a stirring unit that generates torque by ultrasonic vibration from the ultrasonic vibration generating means 25.

[0024]

As described above, the first aspect of the present invention provides
Because it is configured to irradiate ultrasonic waves from the bottom of the cooking pot,
There is an effect that the food is not scorched by the minute vibration of the ultrasonic wave.

Further, since the driving function of the ultrasonic vibrator is integrated into the inverter circuit for performing the induction heating, the invention according to the second aspect has an effect that the cost can be reduced.

In the invention according to claim 3, since a plurality of ultrasonic waves are sequentially irradiated, in addition to the fine vibration of the ultrasonic waves, even the food having a high viscosity is scorched by the water flow caused by the movement of the compression wave. There is an effect that there is no.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a heating cooker according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a heating cooker according to a second embodiment of the present invention.

FIG. 3 is a circuit block diagram of the cooking device;

FIG. 4 is a sectional view of a main part of a heating cooker according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Inverter circuit 2 Cooking pot 3 Heating coil 4 Ultrasonic vibrator 5 Drive circuit 6 Control circuit

──────────────────────────────────────────────────続き Continued on the front page F term (reference) 3K051 AA01 AA02 AA08 AB04 AC40 AC57 AD07 AD33 CD16 CD46 4B055 AA01 BA69 CA01 CA71 CB27 CC04 CC16 CD73 CD80 DA02 DB14 DB15

Claims

[Claims]

1. A high-frequency inverter circuit, a heating coil connected to the inverter circuit, a cooking pot induction-heated by the heating coil, an ultrasonic vibrator attached to the bottom of the cooking pot, A heating circuit comprising a drive circuit for driving an ultrasonic vibrator, wherein the cooking pot has a bottom pot thickness reduced to transmit ultrasonic vibrations.

2. The heating cooker according to claim 1, wherein a heating coil and an ultrasonic vibrator are connected to an inverter circuit having integrated functions of a drive circuit, and ultrasonic irradiation and heating are performed alternately or simultaneously.

3. The heating cooker according to claim 1, wherein a plurality of oscillators are provided in the drive circuit, and the ultrasonic vibrator is sequentially driven at a plurality of frequencies.