JPS63299075A - High-frequency heating device - Google Patents

Abstract

PURPOSE:To reduce the space and ensure the cooling of both functional portions by integrally installing an electromagnetic cooking utensil and a microwave oven. CONSTITUTION:A magnetron 3, a booster transformer 4, an exciting coil 5 for induction heating, a power supply unit 6, an operation switch unit 7, the first cooling fan 8 cooling the power supply unit 6, the second cooling fan 9 cooling the magnetron 3 and the booster transformer 4, and the third cooling fan 10 cooling the exciting coil 5 are provided. A system control circuit 20 transfers the first transfer relay 15, the second transfer relay 22, and a transfer circuit 19 to the microwave oven side (Mo) when a switch 21 is turned on and transfers them to the electromagnetic cooking utensil side (IH) when a switch 23 is turned on. The first and third cooling fans 8, 9 are operated while the device is operated as the microwave oven, and the first and second cooling fans 8, 10 are operated while it is operated as the electromagnetic cooking utensil. One set of high-frequency heating device can be thereby selected to the electromagnetic cooking utensil and the microwave oven, and overheating is prevented.

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.

Conventional technology In general, electromagnetic cookers that use induction heating to heat a container containing objects to be heated, and microwave ovens that use dielectric heating to heat objects are commercially available.In addition, electromagnetic cookers and microwave ovens are each sold separately. However, according to the above configuration, if you own both an electromagnetic cooker and an electronic cooker, you will need space for two.
It is difficult to secure a place for the installation.The present invention solves the above-mentioned problems of the conventional technology.It integrates an electromagnetic cooker and a microwave oven, reduces the installation space, and cools both functional parts. This is to ensure that

Means for Solving the Problems The present invention provides a heating chamber to which microwaves are irradiated, 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 A unidirectional power source obtained from a power source or the like, 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 the inverter circuit. an inverter operation control circuit that controls continuous operation/intermittent operation/stopping of the inverter circuit, a first cooling fan that cools the inverter circuit, etc., a second cooling fan that cools the magnetron and the step-up transformer, and the excitation coil. and when the inverter circuit is in continuous or intermittent operation and the switching circuit is operating to supply the high frequency power to the step-up transformer, the first cooling fan cools the step-up transformer. When the second cooling fan is operating to supply the high frequency power to the excitation coil in a similar state, the first cooling fan is operated in a similar manner to supply the high frequency power to the excitation coil. The high-frequency heating device includes a cooling fan operation control circuit that controls the operation of each of the third cooling fans.

Function Therefore, induction heating (electromagnetic cooker) can be performed using one high-frequency heating device.
Since it is possible to select between two usage modes: and dielectric heating (microwave oven), it is possible to provide a high-frequency heating device that requires less space to install than the conventional two-set setup.Also, when using a microwave oven, the inverter circuit ,
When the magnetron and step-up transformer are used in an electromagnetic cooker, the inverter circuit and excitation coil are cooled, thereby preventing accidents such as ignition due to overheating.

Embodiment FIG. 1 is an example of a perspective 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 an excitation coil 6 for induction heating. , a power supply section 6, an operation switch section 7, a first cooling fan 8 that cools the power supply section 6, a second cooling fan 9 that cools the magnetron 3 and the step-up transformer 4, and a third cooling fan 10 that cools the excitation coil 6. FIG. 2 shows a high-frequency heating device according to an embodiment of the present invention.

It is an electrical system diagram of.

A unidirectional power source 13 obtained by rectifying a commercial power source 11 with a rectifier 12 is linked to the opening and closing of the door 1, passes through a door switch 14 that becomes short-circuited when closed, a first switching relay 16, a main relay 16, and is connected to an inverter circuit. High frequency power supply 1 at 17
8, and is switched and connected to either the excitation coil 6 or the step-up transformer 4 that supplies high-voltage power to the magnetron 3 by a switching circuit 19.

When the microwave oven switch 21 is input in response to an input from the operation switch section 7, the system control circuit 2o switches the first switching relay 15, the second switching relay 22, and the switching circuit 19 to the microwave oven side (Mo). When the electromagnetic cooker switch 23 is input, it switches to the electromagnetic cooker side (IH). Further, when the start switch 24 is input, the main relay 16 and the fan relay 26 are turned ON (closed), and when the stop switch 26 is input, they are turned OFF (open).

Therefore, when the υ door 1 is opened by the first supply control section 26 consisting of the door switch 14 and the first switching relay 16,
The high frequency power source 18 is not applied to the step-up transformer 4, and the application of the high frequency power source 18 to the excitation coil 5 is controlled so as to be unrelated to the opening and closing of the door 1. The second cooling fans 8 and 9 operate, and the magnetron 3, step-up transformer 4,
When the inverter circuit 17 is cooled and operating as an electromagnetic cooker, the first. The third cooling fans 8 and 10 operate to cool the exciting coil 6 and the inverter circuit 17.

Therefore, the system control circuit 20, the second switching relay 22,
The fan relay 26 constitutes a cooling fan control circuit.

Figures 3a and 3b show the door switch 14 that detects the opening/closing of nl.
〇Figure 2 is a conceptual diagram of the operation of 1. Second. A third cooling fan 8,9°1o is provided, but if the required cooling conditions are met, it is also possible to replace it with a single cooling fan, for example by using both the first cooling fan 8 and the second cooling fan. It is.

Also, when the inverter circuit 17 is operated intermittently, a second main relay is connected in series to the main relay 16, and this relay is connected to the system control circuit 20 by ○N10F.
By configuring the cooling fan to be controlled by F, the cooling fan operates continuously and does not cause discomfort to the user.◇ Also, the commercial power supply 11 and rectifier 12 can be replaced with batteries, etc.◇ As described above, the effects of the invention are as follows. According to the present invention, it is possible to select between two modes of use, induction heating (single magnetic cooker) and dielectric heating (microwave oven), with one high-frequency heating device, so the installation space is smaller compared to the conventional method of owning two sets. It is possible to provide a high-frequency heating device with good quality.

In addition, when using a microwave oven, the inverter, evening circuit, magnetron, and step-up transformer are cooled, and when using an electromagnetic cooker, the inverter circuit and excitation coil are cooled, thereby preventing accidents such as ignition due to overheating. Prevented.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is an electrical system diagram thereof, and FIG. 3 is a conceptual diagram of the operation of the door switch. 2... Heating chamber, 3... Magnetron,
4... Step-up transformer, 5... Excitation coil, 8... First cooling fan, 9... Second cooling fan, 1o...・Third cooling fan, 13
... Unidirectional power supply, 17 ... Inverter circuit, 18 ... High frequency power supply, 19 ...
Switching circuit, 20... System control circuit, 22.
...Second switching relay, 26...Fan relay. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Diagram a

Claims (2)

[Claims] (1) A heating chamber that 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 unidirectional power source obtained from a commercial power source, etc. 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 continuous operation/intermittent operation/stopping of the inverter circuit. a first cooling fan that cools the inverter circuit, a second cooling fan that cools the magnetron and the step-up transformer, and a third cooling fan that cools the excitation coil.
When the cooling fan and the inverter circuit are in continuous or intermittent operation and the switching circuit is operating to supply the high frequency power to the step-up transformer, the first and second cooling fans are operated in a similar manner. A high-frequency heating device comprising a cooling fan operation control circuit that controls each of the first and third cooling fans to operate when the high-frequency power source is supplied to the excitation coil in a state in which the high-frequency heating device is in operation. (2) The high-frequency heating device according to claim 1, wherein at least two of the cooling fans are replaced with one cooling fan.