JPS63299089A - High frequency heating device - Google Patents

Abstract

PURPOSE:To integrate an electromagnetic cooking utensil and a microwave oven, reduce the installation space, and safely use both functions by selecting two using modes of induction heating and dielectric heating with one set of high-frequency heating room device. CONSTITUTION:A system control circuit 17 receives the input of an operation switch unit 7 and transfers the first transfer relay 12 and a transfer circuit 16 to the microwave oven side MO when a microwave oven switch 18 is inputted and transfers them to the electromagnetic cooking utensil side IH when an electromagnetic cooking utensil switch 19 is inputted. A main relay 13 is turned on when a start switch 20 is inputted, and it is turned off when a stop switch 21 is inputted. A high-frequency power supply 15 is not applied to a booster transformer 4 when a door is opened by the first feed control unit 22 constituted of a door switch 11 and the first transfer relay 12, and the high-frequency power supply 15 is applied to an exciting coil 5 regardless of the opening or closing of the door. The device is thereby safe, the convenience for handling is improved, and the installation space can be narrower than that of the conventional one.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high frequency heating device that can selectively use induction heating and dielectric heating.

2. Description of the Related Art In general, electromagnetic cookers that use induction heating to heat objects to be heated or containers containing heated objects, and microwave ovens that use dielectric heating to heat objects that are heated are commercially available. And each of these was made separately.

Problems to be Solved by the Invention However, according to the above configuration, if you own both an electromagnetic cooker and a microwave oven, you will need space for two units.
It is difficult to secure a location for its installation.

The present invention solves the above-mentioned problems of the conventional technology, and integrates an electromagnetic cooker and a microwave oven to reduce the space required for electrical installation, and allows both functions to be used safely.

Means for Solving the Problems The present invention has a heating chamber that has a door that can be opened and closed and is irradiated with microwaves, and a magnetron that generates the microwaves.
a step-up transformer that supplies power to the magnetron; and an excitation coil for induction heating.

a unidirectional power source obtained from a commercial power source, an inverter circuit that converts the unidirectional power source into a high frequency power source, a switching circuit that supplies the high frequency power source to at least one of the step-up transformer and the excitation coil; The supply of high frequency power to the opening/closing detection section that detects the opening/closing of the door and the step-up transformer is prohibited when the opening/closing detection section detects the open state, and the supply of high frequency power to the excitation coil is prohibited when the opening/closing detection section detects the opening/closing of the door. The present invention provides a high-frequency heating device comprising a supply control section that controls the switching circuit or the inverter circuit so as to be independent of the state of the section.

Function Therefore, induction heating (electromagnetic cooker) can be performed using one high-frequency heating device.
There are two usage options available: and dielectric heating (microwave oven). Furthermore, when used as a microwave oven, when the door of the heating chamber is open, the inverter circuit is stopped or other measures are taken to prevent microwaves from being emitted from the magnetron, so radio waves may have an adverse effect on the human body. Never.

Furthermore, when used as an electromagnetic cooker, high-frequency heating is possible even when the door is opened, so even if the door is opened during induction cooking for the next microwave cooking, cooking will not be interrupted. . Therefore, it is possible to provide a high-frequency heating device that is safe, easy to use, and requires less installation space than conventional ones.

Furthermore, since the inverter circuit and the like for producing the high frequency power source can be shared, the above-mentioned provision can be made at low cost.

Embodiment FIG. 1 is an example of an external view of a high frequency heating device according to an embodiment of the present invention. The device has a door 1 that can be opened and closed, a heating chamber 2 that is irradiated with microwaves, a magnetron 3 that generates microwaves, a step-up transformer 4 that supplies power to the magnetron 3, and a Excitation coil 6
, a power source section 6, and an operation switch section 7.

FIG. 2 is an electrical system diagram of a high frequency heating device according to an embodiment of the present invention.

Unidirectional power source 1 obtained by rectifying commercial power source 8 with rectifier 9
0 is linked to the opening and closing of the door 1, and passes through the door switch 11, which becomes inactive when closed, the first switching relay 12, and the main relay 13, and is connected to the high frequency power source 16 by the inverter circuit 14.
The switching circuit 16 switches between the excitation coil 6 and the step-up transformer 4 that supplies high-voltage power to the magnetron 3.

Connected.

The system control circuit 17 receives an input from the operation switch section 70, and when the microwave oven switch 18 is input, the first switching relay 12 and the switching circuit 16 are set to the microwave oven side bow, and when the electromagnetic cooker switch 19 is input, the system control circuit 17 switches the first switching relay 12 and the switching circuit 16 to the microwave oven side bow. Switch to IH on the electromagnetic cooker side. When the start switch 20 is input, the main relay 13 is turned ON (closed), and when the stop switch 21 is input, it is turned OFF (open).

Therefore, when the door 1 is opened by the first supply control section 22 consisting of the door switch 11 and the first switching relay 12,
The high frequency power supply 15 is not applied to the step-up transformer 4, and the application of the high frequency power supply 16 to the excitation coil 6 is controlled so as to be unrelated to the opening and closing of the door.

Figures 3a and 3b show the door switch 11 that detects the opening and closing of the door 1.
It is a conceptual diagram of the operation.

FIG. 4 is a partially detailed diagram of an electrical system diagram according to a second embodiment of the present invention.

In this second embodiment, unlike in FIG.
1 is inserted between the switching circuit 160 and the step-up transformer 4 to constitute the second supply control section 23, and the same operation as in the first embodiment is obtained. In this case, the first
The switching relay 12 becomes unnecessary.

FIG. 6 is a partially detailed diagram of an electrical system diagram according to a third embodiment of the present invention.

In this third embodiment, unlike the one shown in FIG.
The safety relay 24 inserted in the microwave oven side M0 of 4 is set to 0.
N10FF. Naturally, when the door switch 11 is 0FF (open), the safety relay 25 is also 0FF (open), and the same operation as in the first embodiment is achieved.

In this case, the door switch 11. Second switching relay 24
．． and a safety relay 25 constitute a third supply control section 26.

Also, based on the same idea, when door 1 is open and the microwave oven is selected, a part of the inverter circuit is turned off.
The same operation as described above is also performed in other embodiments, such as turning off the commercial power supply 8 or turning off the commercial power supply 8.

Furthermore, the commercial power source 8 and rectifier 9 shown in FIG. 2 can be replaced with a battery or the like.

Effects of the Invention As described above, according to the present invention, one high-frequency heating device can perform both induction heating (electromagnetic cooker) and dielectric heating (microwave oven).
Two usage modes are selectable.

In addition, when used as a microwave oven, when the door of the heating chamber is open, the Yagne Fron is configured to prevent microwaves from being emitted by means such as stopping the inverter circuit, so radio waves can have an adverse effect on the human body. Never give up. In addition, when used as an electromagnetic cooker, high-frequency heating is possible even when the door is opened, so even if the door is opened for the next microwave cooking during electromagnetic cooking, cooking will not be interrupted. .

Therefore, it is possible to provide a high-frequency heating device that is safe, easy to use, and requires less installation space than conventional ones.

Furthermore, since the inverter circuit i for producing the high-frequency power source can be shared, the above-mentioned provision can be made at low cost.

[Brief explanation of the drawing]

Figure 1 is an external view of a high-frequency heating device according to an embodiment of the present invention, Figure 2 is an electrical system diagram according to the first embodiment, and Figure 3a.
, b is a conceptual diagram of the operation of the same door switch, FIG. 4 is a partially detailed diagram of an electrical system diagram according to the second embodiment of the present invention, and FIG. 6 is a part of an electrical system diagram according to the third embodiment of the present invention. It is a detailed view. 1...Door, 2...Heating chamber, 3...
... Magnetron, 4... Step-up transformer, 6.
...Exciting coil, 8...Commercial power supply, 1o
... Unidirectional power supply, 11 ... Door switch, 14 ... Inverter circuit, 16 ...
・High frequency power supply, 16...Switching circuit 422...
... first supply control section, 23 ... second supply control section, 26 ... third supply control section. Name of agent: Patent attorney Toshio Nakao and one other person
door? -Nine tatami! 3--Madene) 1) N4-Issenjie F lance s-m coil g- source capital Fig. 3 ((L) (b) Fig. 4
23-O2 椹沁掁控U 26--O3Supply cost jUei Figure 5 People?

Claims (1)

[Claims] A heating chamber that has an openable/closable door and is irradiated with microwaves, a magnetron that generates the microwaves, a step-up transformer that supplies power to the magnetron, an excitation coil for induction heating, and a commercial power source, etc. the obtained unidirectional power source, an inverter circuit that converts the unidirectional power source into a high frequency power source, a switching circuit that supplies the high frequency power source to at least one of the step-up transformer and the excitation coil, and detects opening and closing of the door. The supply of high frequency power to the open/close detector and the step-up transformer is prohibited when the open/close detector detects an open state, and the supply of high frequency power to the excitation coil is independent of the state of the open/close detector. A high-frequency heating device comprising a supply control section that controls the switching circuit or the inverter circuit so that the following is achieved.