JPH0228065B2 - OOBUNTOOSUTATONOBAISHOSEIGYOSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device having an automatic roasting function, that is, a roasting control device for a toaster oven, a toaster, an oven, and the like.

Conventional configuration and its problems Conventional toaster ovens with an automatic roasting function, that is, a control function that ensures uniform browning even when toasting bread continuously, are When the roasting switch is turned on, the automatic roasting switch is mechanically held and the heater is energized.
When a predetermined period of time has elapsed, the electromagnetic device operates to automatically release the hold and return the switch to its original state. Then, power supply to the heater is stopped. however,
If the automatic roasting switch is turned on before the power is turned on, that is, before the power outlet is plugged in, the heater is immediately energized and generates heat, heating the body and doors. Therefore, unless the user consciously turns on the automatic roasting switch, there is a danger that he or she may inadvertently touch the heated body or door and suffer burns.

Purpose of the Invention The present invention solves the above-mentioned problems of the conventional art, and the automatic roasting switch is always opened immediately after the power outlet is plugged in so that the heater is not energized.
To provide a safe roasting control device for a toaster oven, etc., which energizes a heater only when a user next turns on an automatic roasting switch.

Structure of the Invention In order to achieve the above object, the present invention includes an automatic roasting switch that energizes a heater, a holding means that holds the automatic roasting switch when the switch is closed, and an automatic roasting switch that operates when the electricity is turned on. An electromagnetic device that opens a roasting switch, and an electromagnetic device that operates for a short period of time immediately after power is turned on to open an automatic roasting switch, and then close the automatic roasting switch to open the automatic roasting switch. A roaster such as an oven toaster, which has a means of turning on electricity and operating the electromagnetic device again after a predetermined period of time has elapsed, so that the electromagnetic device is always operated immediately after the power outlet is turned on, and the automatic roasting switch is returned to the initial state. It is a baking control device.

DESCRIPTION OF EMBODIMENTS The figure shows an embodiment of the present invention. In FIG. 1, 1 is a commercial power source (AC100V), which is rectified by a diode 2 that connects a plug provided in a toaster oven to the power source. A DC power source for a microcomputer (hereinafter referred to as microcomputer) 5 is formed by the capacitor 3 and the constant voltage diode 4.
On the other hand, 6 is an automatic roasting switch that supplies electricity to the heater 7, and when the switch 6 is closed, its state is maintained by a separately provided holding means 12. 8 is the holding means 12 when energized.
This is an electromagnetic device that operates the automatic roasting switch 6 to open the automatic roasting switch 6, and a thyristor 9 is connected in series with the electromagnetic device. Further, the thyristor 9 is driven by the output from the microcomputer 5, and when it becomes conductive, current flows through the electromagnetic device 8 and the holding of the automatic roasting switch 6 is released. Further, a signal for determining whether the automatic roasting switch 6 is closed or open is applied to the input terminal 10 of the microcomputer 5.

Next, the operation of the microcomputer 5 will be explained. When power is applied to the microcomputer 5, the first thing it does is set the output port 11 to “H” and turn on the thyristor 9.
conducts for a short time. This causes the automatic roasting switch 6 to be opened. Thereafter, the output port 11 is set to "L" and waits until a switch signal is input to the input port 10. Next, when the automatic roasting switch 6 is closed and a switch signal is input, it is determined how many times the bread is roasted, and the time period for which the heater 7 is energized is calculated. When the calculated time elapses after the automatic roasting switch 6 is turned on, the output port 11 of the microcomputer 5 becomes "H" again, the thyristor 9 is made conductive, and the automatic roasting switch 6 is opened by the electromagnetic device 8. let

Therefore, even if the automatic roasting switch 6 is closed and connected to the power source 1, the automatic roasting switch 6 will open immediately (in approximately 0.1 seconds in this embodiment). Since the heater 7 is not energized, the fuselage and the door will not be heated, making it safe.

Note that various configurations have been known for the holding means 12 that holds the automatic roasting switch 6 when it is closed, one example of which is shown in FIG. 2. In this figure, the same parts as in FIG. 1 are given the same reference numerals. FIG. 2a shows the automatic roasting switch 6 in an open state, and FIG. 2b shows it in a closed state.

In FIG. 2a, when the user pushes down the operating body 13 against the spring 14, the switch operation part 15 of the operating body 13 descends while contacting the lever 16, and when it descends to a certain point, the spring 18 As a result of this action, the end 17 of the lever 16 locks the switch operating portion 15. This state is shown in FIG. 2b, and the automatic roasting switch 6 is kept in the closed state.

Next, when the electromagnetic device 8 is energized in the state shown in FIG. death,
The automatic roasting switch 6 is to be opened.

Therefore, as mentioned above, when the automatic roasting switch 6 is closed (Fig. 2b), the equipment is turned on from the power supply 1.
Even when connected, the electromagnetic device 8 operates and the automatic roasting switch 6 is immediately opened. Then, the process waits until the next automatic roasting switch 6 is closed. Then, when the automatic roasting switch 6 is closed, the heater 7
After a predetermined period of time has elapsed, the microcomputer 5 operates the electromagnetic device 8 again to open the automatic roasting switch 6, thereby completing the first roasting process.

Effects of the Invention As described above, the roasting control device such as a toaster oven of the present invention automatically opens the automatic roasting switch and turns on the heater even if the automatic roasting switch is turned on and the power is connected. It is safe because there is no need to worry about burns, etc., as it stops energizing and waits until the next automatic roasting switch is closed. Although the embodiments have been described based on a toaster oven, similar effects can be expected in a toaster oven or the like.

In addition, in this example, the explanation was given as a roasting control device such as a toaster oven that has an automatic roasting function that does not change the color even when bread is continuously roasted. Needless to say, it can also be used as a roasting control device for a toaster oven.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a roasting control device for a toaster oven or the like according to an embodiment of the present invention, and FIGS. 2a and 2b are schematic diagrams showing an example of holding means for an automatic roasting switch. 1...Commercial power supply, 5...Microcomputer (microcomputer), 6...Automatic roasting switch, 7...
Heater, 8...electromagnetic device, 9...thyristor.

Claims (1)

[Claims] 1. An automatic roasting switch that energizes the heater, a holding means that holds the automatic roasting switch when the switch is closed, and an electromagnetic device that operates the holding means when energized to open the automatic roasting switch. This electromagnetic device is operated for a short time immediately after the power is turned on to open the automatic roasting switch, and the next time the automatic roasting switch is closed, the heater is energized, and after a predetermined energization time has passed, the electromagnetic device is operated again. A roasting control device such as a toaster oven, which has a means for operating a toaster oven.