JP3314129B2 - Control circuit of high frequency heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating apparatus for controlling heating by taking in a quantity of a heated object, and more particularly to a control circuit of a high-frequency heating apparatus for preventing destruction of data taken in a quantity.

[0002]

2. Description of the Related Art Conventionally, in a control circuit of a high-frequency heating apparatus for heating by taking in a quantity of a heated object, a microcomputer drives a relay for driving a table motor to rotate the table motor so that the quantity can be taken in stably. The table is rotated, and the amount data is sampled and calculated during the rotation of the turntable to determine the correct amount.

Further, in order to confirm the quantity of the heated material, the microcomputer fetches a value of zero quantity (zero point of the quantity) by rotating the turntable in a state where there is no heated substance, and stores it in the RAM. It was stored and used as a reference value when measuring the quantity of the heated material.

In such a case, a memory IC is used so that the memory of zero points is maintained even when a power failure or the like occurs.
The microcomputer captures the zero-point data, stores the calculated value in the RAM, and then communicates with the memory IC to store the value in the memory IC, and simultaneously drives the table motor to stop the turntable. Output the OFF signal to the relay.

[0005]

However, in the above configuration, the relay for driving the table motor is connected to the OF.
Even if the microcomputer outputs a signal to perform F, the operation time of the relay drive circuit, the time when the relay is turned off, and the table motor is reliably turned off after the relay is turned off.
If the microcomputer outputs a signal to the memory IC immediately after outputting the relay OFF signal to the relay drive circuit, the table motor may be turned off while this signal is being output. , Relay chattering noise or table motor is off
Noise or the like at this time affects the signal between the microcomputer and the memory IC, and there is a risk that the signal data may be destroyed or the data stored in the memory IC may be destroyed.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an automatic cooking function for detecting an amount of a heated object by mounting an amount sensor and heating the object for a time corresponding to the amount. A high-frequency heating apparatus having a table motor for driving a turntable for placing a heated object and rotating the heated object; a quantity sensor installed near the table motor for detecting the quantity of the heated substance; A relay that performs OFF driving, a relay drive circuit that drives this relay, and a signal from a quantity sensor during automatic cooking, inputs data on the quantity of the heated object, calculates the cooking time from this data value, and calculates the cooking time. A signal is output to the relay drive circuit when a quantity in the state where there is no heated material, that is, a point of 0, is taken in when there is no heated material, which is a reference value for cooking Rotate the data and take in the stable quantity value, and even if the commercial power supplied to the high-frequency heating device is cut off due to a power outage etc. In the control of outputting a signal to be input to the memory IC for storing,
The stored signal is not output at the same time as the data is taken in from the quantity sensor, and the OFF signal is output to the relay drive circuit so that the relay is turned OFF.
A control circuit of the high-frequency heating device is constituted by a microcomputer that outputs a storage signal after a specified time until the FF is performed.

[0007]

The microcomputer takes in the data of the quantity of the heated material from the quantity sensor, and when taking in the quantity without the heated substance which is the reference value of the quantity, that is, the quantity of 0 points,
A signal is output to the relay drive circuit, the table motor is rotated, and the value of the stable amount is taken in. Even if the commercial power supplied to the high-frequency heating device is cut off due to a power failure or the like, the commercial power is restored again. In this case, the data of the quantity 0 is stored, and when outputting the signal to be input to the memory IC, the data is taken in from the quantity sensor and at the same time, the storage signal is not outputted and the relay drive circuit is turned off so that the relay is turned off. The storage signal is output after a specified time from when the OFF signal is output to when the table motor is turned off without fail. Accordingly, chattering when the relay is turned off and noise generated from the table motor do not destroy the quantity data communicated between the microcomputer and the memory IC, and do not destroy the data stored in the memory IC.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block circuit diagram of a high-frequency heating device according to one embodiment of the present invention, and FIG. 2 is a timing chart of data communication between a microcomputer and a memory IC.

In FIG. 1, reference numeral 1 denotes a table motor for driving a turntable for placing a heated object and rotating the heated object, and 2 is installed near the table motor 1;
A quantity sensor for detecting the quantity of the heated object, 3 is a relay for turning ON / OFF the table motor 1, and 4 is a relay drive circuit for driving the relay 3.

Reference numeral 5 denotes a quantity sensor 2 and a setting device (not shown).
Is a microcomputer that controls the relay drive circuit 4 and the heating device (not shown), etc., based on output signals from the microcomputer. A rewritable memory IC to be stored, such as an EEPROM or a flash memory.

The microcomputer 5 receives a signal from the quantity sensor 2 and takes in data on the quantity of the heated object, calculates the cooking time from this data value, and is a reference value for cooking the heated object. When taking in the zero point of the quantity, the signal (A) is output to the relay drive circuit 4 as shown in FIG. 2, the table motor 1 is rotated (B), and the value of the stable quantity is taken in. Even if the commercial power supplied to the high-frequency heating device is cut off due to a power failure or the like, the signal input to the memory IC 6 is output in order to store the zero-point data when the commercial power is restored again. In this control, the storage signal is not output at the same time as the data (C) is taken in from the quantity sensor 2 and the relay 3 is turned off.
The storage signal (D) is output after a specified time from when the OFF signal is output to the relay drive circuit 4 so as to perform F to when the table motor 1 is reliably turned OFF.

With this configuration, the microcomputer 5
It is not necessary to destroy the amount data communicated between the memory IC 6 and the memory IC 6 or to destroy the data stored in the memory IC 6.

[0013]

According to the present invention, when the data of the quantity of the heated object is taken in from the quantity sensor and the quantity in the state where there is no heated substance, that is, the quantity reference point, that is, the zero point of the quantity, is taken into the relay drive circuit. Is output, the table motor is rotated, and the stable amount value is taken in. Even if the commercial power supplied by a power failure or the like is cut off when the commercial power is cut off, the data of the zero amount is stored when the commercial power is restored again. In addition, when outputting the signal to be input to the memory IC, the data is taken in from the quantity sensor and at the same time, the stored signal is not output, and the OFF signal is output to the relay driving circuit so that the relay is turned OFF. Since the control circuit of the high-frequency heating device was configured by a microcomputer that outputs a stored signal after a specified time until the table motor was turned off, The noise generated from the ring and table motor, a microcomputer and a memory IC
The automatic cooking not only obtains a stable finish without destroying the amount data communicated between the devices and the data stored in the memory IC, but also eliminates erroneous determination of the amount and overheats (cooks). Can prevent the ignition of a heated material, thereby improving safety and reliability.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a high-frequency heating device according to one embodiment of the present invention.

FIG. 2 is also a timing chart of data communication between a microcomputer and a memory IC.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 table motor 2 quantity sensor 3 relay 4 relay drive circuit 5 microcomputer 6 memory IC

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24C 7/02 315 H05B 6/68 350

Claims (1)

(57) [Claims] 1. A high-frequency heating apparatus having an automatic cooking function for detecting an amount of a heated object by mounting an amount sensor and heating the object for a time corresponding to the amount sensor, comprising a turntable for placing the heated object and rotating the heated object. A table motor (1) to be driven, a quantity sensor (2) installed near the table motor (1) to detect a quantity of a heated object, and a relay (3) for ON / OFF driving the table motor (1). And a relay driving circuit (4) for driving the relay (3) and a signal from the quantity sensor (2) during automatic cooking to take in data of the quantity of the heated object, and calculate the cooking time from the data value. When calculating the reference value for cooking the heated object, that is, the reference value for cooking the heated object, that is, the zero point of the measured amount without the heated object, a signal is output to the relay drive circuit (4) to output the table motor (1). ) Is rotated to take in a stable quantity value, and even if the commercial power supplied to the high-frequency heating device is cut off due to a power failure or the like, and the commercial power is restored again, the quantity 0 point data is stored. In the control for outputting a signal to be input to the memory IC (6), the data is taken in from the quantity sensor (2), and at the same time, the storage signal is not output and the relay (3) is turned off. A microcomputer (5) that outputs a stored signal after a specified time from when a relay OFF signal is output to the relay drive circuit (3) to when the table motor (1) is reliably turned off. Control circuit of high frequency heating device.