JP2011149610A - Cooking apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem in conventional apparatuses such as a microwave oven that power is consumed due to component failures, or the like during standby in spite of during the standby in the cooking apparatuses such as the microwave oven. <P>SOLUTION: A cooking apparatus is configured to instruct an power opening/closing means 5 to intercept power supply to a control means 3 during the standby, and furthermore, to intercept a second power opening/closing means 7, thereby intercepting a driving power of a driving means 8 for driving a heating means 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a control circuit that reduces power consumption when not used in a cooker.

  Conventionally, in this type of circuit configuration, when the main operation is stopped, so-called standby, when a microcomputer is used as the control means, the power of the microcomputer circuit is cut off to reduce the power consumption of the equipment, for example, part of the heating chamber is opened and closed The microcomputer is turned on again by the opening / closing operation of the door, which enables the device to operate (see, for example, Patent Document 1).

  FIG. 4 shows a conventional circuit configuration described in Patent Document 1. In FIG. As shown in FIG. 4, the power supply circuit 4 that supplies power to the control means 3, the power switching means 5 that opens and closes the power supply from the power supply circuit 4 to the control means 3, and the ON / OFF of the power switching means 5 are controlled. The holding means 6 is configured. Further, according to Patent Document 2, a configuration in which a relay is driven by the logical product of two or more control signals when the control depends on the control of the semiconductor control device is shown as ensuring the safety of the device.

JP 2002-327924 A JP 2007-35390 A

  However, in the conventional configuration, in the method of opening and closing the power supply of the microcomputer circuit of the control means 3, it is used for the control of the heating means with a large current and high output. There was a problem of continuing to consume power even if there was. Moreover, it is a big subject that the safety | security of an apparatus is impaired by the time of a failure.

  The present invention solves the above-described conventional problems, and provides a control circuit in which a second control circuit independent of a microcomputer circuit is added to a drive circuit, and reliability at the time of standby power reduction is improved. Objective.

  In order to solve the above-described conventional problems, the cooker of the present invention adds a second power opening / closing means for opening / closing a power supply of a driving means for driving a heating means to a power opening / closing means for opening / closing a power supply of a control means, The power supply for both the control means and the drive means is cut off.

  As a result, the heating means stops driving the heating means because the second power switching means cuts off the power of the driving means when the control means continues to operate even when the power controlling means cuts off the power when the control means is on standby. This saves power during standby.

  The cooker according to the present invention provides a configuration that does not hinder reduction in power consumption during standby due to a failure of the control circuit or the like by adding a second power switching means to the conventional standby power compatible control circuit. it can.

The circuit block diagram in Embodiment 1 of this invention Circuit configuration diagram according to Embodiment 2 of the present invention Circuit configuration diagram according to Embodiment 3 of the present invention Conventional circuit diagram

  According to a first aspect of the present invention, there is provided a power opening / closing device for opening / closing power to the control means provided between a heating means for heating food, a key input means for setting, a control means for controlling a cooker, and the control means. Means, holding means for holding the open / close state of the power open / close means, and second power open / close means operating depending on the power open / close means, wherein the heating means includes the control means and the second open / close means. When the control means is shut off by the power switching means, that is, in a so-called standby state, the second power switching means that is the power source of the driving means for driving the heating means is provided by providing the driving means that is driven by logical product. By shutting off the power supply of the drive means for driving the heating means, there is an effect of ensuring the operation of the drive means during standby.

  The second aspect of the invention is particularly a control means that exceeds the operating voltage of the microcomputer constituting the control means by setting the circuit voltage of the second power switching means of the first invention to be higher than the circuit voltage of the power switching means. Thus, the effect of claim 1 can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a circuit configuration according to the first embodiment of the present invention.

  In FIG. 1, a power supply circuit 4 converts a commercial power supply such as 100 V, 200 V, 50 Hz / 60 Hz into a DC low voltage for a control means 3 and a drive means 4 using a microcomputer, for example, 12 V or 5 V, and 12 V is a relay. 5V is used for the power source of the microcomputer and the power source of the microcomputer, etc., and the power open / close control during standby is such that 5V is cut off during standby.

  The power opening / closing means 5 gives an instruction to start supplying 5V power for the control means 3 according to the state of the key input means 2, and the state is held by the holding means 6. After the power opening / closing means 5 starts to supply power to the control means 3, the state can be maintained by the holding means 6 from the control means 3.

  The second power switching means 7 operates in conjunction with the power switching means 5 and has a simple configuration that stops during standby, and opens and closes a 12V power supply for relay from a circuit power supply.

  The drive means 8 is operated from the control means 3 by the key input means 2. At this time, the driving means 8 operates by the logical product of the control means 3 and the second power switching means 7 to drive the heating means 1.

  As described above, according to the present embodiment, when the second power switching means 7 is in the power cut-off state, even if the control means 3 issues a signal for operating the driving means 8, the heating means 1 stops and performs a standby operation. Can be maintained.

(Embodiment 2)
FIG. 2 shows a circuit configuration according to the second embodiment of the present invention.

In FIG. 2, a second power control circuit 9 composed of NPN and PNP transistors as the second power switching means receives the output of the power switching means 5 as an input, and a power source 12V of a drive circuit 10 composed of a relay 12 and a transistor. The heater 11 is driven as a heating means.

(Embodiment 3)
FIG. 3 shows a circuit configuration according to the third embodiment of the present invention.

  In FIG. 3, the second power control circuit 9 constituted by an NPN transistor as the second power switching means is arranged on the 0V side of the drive circuit 10 to simplify the connection with the power switching means 5.

  The operation and action of the control circuit configured as described above will be described below.

  First, the circuit power supply connected to the commercial power supply cuts off the microcomputer power supply 5V by standby power control during standby, and supplies the microcomputer power supply 5V by opening and closing the key input means for activation, and the second control circuit during standby. However, even if the control circuit operates, the heating means does not operate.

  As described above, in the present embodiment, the second power switching means is added to the control means under the condition that the heating means operates, and the drive circuit is forcibly cut off by the second power switching means during standby. Thus, it is possible to prevent excessive power consumption even in a situation where the driving means operates due to a component failure or the like even during standby. In addition, since the operating conditions of the heating means are multiplexed, it is also effective as a safety means such as a microwave oven or oven as a cooking device, and can be easily mounted.

  As described above, since the cooking device according to the present invention can be easily mounted on a conventional circuit configuration, it is particularly effective as a safe means such as a microwave oven or oven as a cooking device, and can be easily mounted. Is the method.

DESCRIPTION OF SYMBOLS 1 Heating means 2 Key input means 3 Control means 4 Power supply circuit 5 Power switching means 6 Holding means 7 2nd power switching means 8 Driving means 9 2nd power control circuit 10 Driving circuit 11 Heater 12 Relay 13 High frequency oscillation part

Claims (2)

Heating means for heating the food; key input means for setting; control means for controlling the cooker; power opening and closing means provided between the control means for opening and closing power to the control means; and the power opening and closing Holding means for holding the open / closed state of the means, and second power opening / closing means operating depending on the power opening / closing means,
A cooking device characterized in that the heating means includes a driving means that is driven by a logical product of an output signal of the control means and the second opening / closing means. The cooker according to claim 1, wherein the circuit voltage of the second power switching means is higher than the circuit voltage of the power switching means.