JP2692288B2 - High frequency heating equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device capable of performing both induction heating and dielectric heating. More specifically, the dielectric heating unit has a high-frequency heating function. It relates to the device.

2. Description of the Related Art Conventional devices of this type have a one-piece construction. That is,
A heating coil for induction heating, a microwave generator for dielectric heating, and an inverter circuit that operates with a household power source (commercial power source) are provided in one body, and the heating coil and microwave generator described above are provided. One of the two is driven by an inverter circuit.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, induction heating requires a mounting space for mounting an object to be heated above a heating coil, while dielectric heating requires a heating chamber for accommodating the object to be heated. . Since it is practically inconvenient to provide the above-mentioned mounting space inside the heating chamber, the mounting space may be disposed above the heating chamber or below the heating chamber with a drawer structure.

However, with such an integrated structure, it was difficult to move the device freely due to the size and weight of the device. Further, the dielectric heater needs high voltage and needs to be grounded, so that it is inevitably difficult to make it portable.

The present invention solves the conventional problems, and an object thereof is to provide a high-frequency heating device in which the induction heating unit and the dielectric heating unit are detachable, and the dielectric heating unit has portability. And

Means for Solving the Problems In order to solve the above problems, the high-frequency heating device of the present invention has an induction heating unit and an induction heating unit, which are configured to be removable. The induction heating unit has a heating coil for heating an object to be heated and an inverter circuit for driving the heating coil by supplying electric power from a commercial power source, while the dielectric heating unit has a heating chamber for accommodating the object to be heated. A microwave generator for generating microwaves for supplying power to the heating chamber; an electromagnetic coupling means arranged to face the heating coil; and a driving power connected to the electromagnetic coupling means for supplying the microwave generator with driving power. And a step-up transformer that operates.

Operation According to the present invention, when the induction heating unit is used, the dielectric heating unit is detached and used due to the above-mentioned configuration. When using the dielectric heating unit, the dielectric heating unit is placed and used above the induction heating unit. In this case, the heating coil and the electromagnetic coupling means are electromagnetically coupled to each other, electric power is transmitted from the heating coil to the electromagnetic coupling means, the booster transformer boosts the electric power to a desired high voltage, and the microwave generator operates. At this time, since the dielectric heating unit is insulated from the commercial power source, it is not necessary to ground the dielectric heating unit. In addition, since the induction heating unit is provided with most of the driving circuit required for operation of the dielectric heating unit, the dielectric heating unit is lightweight and highly portable. Furthermore, since the induction heating unit is a portable unit, it can be used not only in the kitchen, but also in the living room or children's room, if it has an induction heating unit.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 and 2, 1 is an induction heating unit,
Reference numeral 2 is a driving power source for the induction heating unit, 3 is a dielectric heating unit, and 4 is a driving power source for the dielectric heating unit. The induction heating unit 1 includes a heating coil 5 for heating an object to be heated,
As a driving power source 2 for supplying a high frequency current to the heating coil, a rectifier 7 for rectifying a commercial power source 6, an input capacitor 8, an inverter circuit 9, and a control circuit 10 for controlling the operation of a switching element of the inverter circuit are provided. On the other hand, the dielectric heating unit 3 is a heating chamber that stores an object to be heated.
11, a microwave generator 12 for generating a microwave for supplying power to the heating chamber, an electromagnetic coupling means 13, and a step-up transformer 14 connected to the electromagnetic coupling means. A high voltage winding 15 provided on the secondary side of the step-up transformer has a voltage doubler circuit composed of a capacitor 16 and a diode 17, and supplies a desired voltage between the anode and cathode of the microwave generator 12. On the other hand, the low-voltage winding 18 provided on the secondary side of the step-up transformer supplies the microwave heating power to the microwave generator 12. A dielectric heating unit can be detachably mounted on the induction heating unit, and the heating coil 5 and the electromagnetic coupling means 13 are arranged to face each other in the mounted state.

Reference numeral 19 is a waveguide, and 20 is a door for loading and unloading the object to be heated.

When the induction heating unit 1 is used in the above-mentioned configuration, the dielectric heating unit 3 on the induction heating unit 3 is removed.
At this time, since there is no connection between the induction heating unit 1 and the dielectric heating unit 3, it can be easily removed. Then, an object to be heated is placed on the upper surface of the induction heating unit 1 and high frequency heating is performed as in the conventional case.

Next, when the dielectric heating unit 3 is used, the dielectric heating unit 3 is placed on the induction heating unit 1. At this time, the heating coil 5 of the induction heating unit 1 and the electromagnetic coupling means 13 of the dielectric heating unit 3 are placed so as to face each other with a predetermined gap. When the induction heating unit 1 is powered on, the electric power for driving the microwave generator 12 is transmitted to the dielectric heating unit 3 by the electromagnetic coupling between the heating coil 5 and the electromagnetic coupling means 13. Although not shown, the microwave generator 12 operates and does not operate in conjunction with opening and closing of the door 20. The variable output of the microwave also serves as the variable output mechanism of the induction heating unit 1. Since the dielectric heating unit 3 is completely insulated from the commercial power source, the dielectric heating unit 3 does not need to be grounded.

Also, since most of the driving power supply unit of the dielectric heating unit 3 also serves as the driving power supply of the induction heating unit 1, the dielectric heating unit 3 can be significantly reduced in size and weight and can be configured as a portable device. Therefore, the induction heating unit 1 can be embedded in the kitchen system and the dielectric heating unit 3 can be housed in the housing box or placed on a table in response to the system kitchen. Moreover, if the induction heating unit is provided, it can be used not only in the kitchen but also in any place in the home such as the living room, bedroom, or child's room.

Effects of the Invention As described above, according to the high-frequency heating device of the present invention, the following effects can be obtained.

(1) Since the microwave generator is configured to transmit electric power to the commercial power source by coupling the heating coil of the induction heating unit and the electromagnetic coupling means, it is not necessary to take measures for insulating the dielectric heating unit. Most of the wave generator drive power supply unit can also be used as the drive power supply housed in the induction heating unit, and the dielectric heating unit having high portability can be provided.

(2) Since the induction heating unit and the dielectric heating unit are detached and separated, the usage of each unit is greatly expanded.

(3) Dielectric heating units are easy to carry and are not limited to kitchen spaces. For example, if you have an induction heating unit embedded in a table, you can use it as a tatami room, or if you have an induction heating unit, you can use it in the living room, bedroom, children's room, etc. A dielectric heating unit can be used.

[Brief description of the drawings]

FIG. 1 is a block diagram of a high-frequency heating device showing an embodiment of the present invention, and FIG. 2 is a drive power supply circuit diagram of FIG. 5 ... Heating coil, 6 ... Commercial power supply, 9 ... Inverter circuit, 11 ... Heating chamber, 12 ... Microwave generator, 13 ...
Electromagnetic coupling means, 14 ... Step-up transformer.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Naoyoshi Maehara 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-63-91994 (JP, A) JP-A-3 -81989 (JP, A)

Claims (1)

(57) [Claims] 1. An induction heating unit comprising a heating coil for induction heating an object to be heated and an inverter circuit for driving the heating coil by supplying electric power from a commercial power source, and an induction heating unit detachably arranged in the induction heating unit. In a high-frequency heating device provided with a unit, the dielectric heating unit includes a heating chamber for accommodating an object to be heated and performing dielectric heating, a microwave generator for generating microwaves for supplying power to the heating chamber, and the heating coil. High-frequency heating device including an electromagnetic coupling unit arranged as a unit and a step-up transformer that supplies drive power to the microwave generator connected to the electromagnetic coupling unit.