JPS6321778A - Automatic roaster - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic roasting apparatus that performs roasting operation by selecting various cooking modes.

[Prior Art] Conventionally, an automatic roasting device sets a timer time by operating a timer dial depending on the content to be cooked, performs roasting operation for that time, and then returns the dial as time elapses to display the remaining time. [Problems to be Solved by the Invention] However, with such a device, it is impossible to know which cooking content is set, and furthermore, there are problems in that it is difficult to check the display of the remaining time.

This invention was made in order to solve these problems, and it is possible to easily check the cooking content settings on the display, and also to easily check the remaining time when the power is turned on.Furthermore, both display confirmations can be done on a common display. The purpose of the present invention is to provide an automatic roasting device that can be roasted using a method.

Another object of the present invention is to provide an automatic roasting device that is easy to use and allows the timer settings and display contents to return to the initial settings when the roasting operation is completed.

Means for Solving Problem E] The present invention includes a selection switch for selecting a cooking mode, a time setting means for automatically setting a timer time in accordance with the selection operation of the selection switch, and a time setting means for automatically setting a timer time according to the selection operation of the selection switch. a display means for displaying a set cooking mode; a heat generating load; a load energization control means for controlling energization to the heat generating load according to the timer time set by the time setting means; When energization control is started, the display control means switches the display of the display means from the cooking mode display to the remaining time display, and also changes the display method from the display method when the cooking mode is displayed. .

Further, the present invention further includes repeat control means for returning the timer setting state and the display state of the display means to the initial setting state when the load energization control means finishes controlling the energization of the heat generating load.

[Operation] In the present invention having such a configuration, when a cooking mode is selected and set using the selection switch, the timer time is set accordingly, and the set cooking mode is displayed on the display means. When the roasting operation is started based on this timer time, the display state of the display means is switched from the cooking mode display state to the remaining time display state, and the display method is also switched.

Further, when the roasting operation based on the set timer time is completed, the timer setting state returns to the initial setting state, and the display on the display means also returns to the display state of the set cooking mode.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a perspective view showing the exterior, with a door 2 on the front of the housing 1.
is provided, and the door 2 can be opened and closed with respect to the body 1 by a handle 3.

The door 2 has a glass surface 5 on the inside of the frame 4,
It is now possible to check the inside.

An operation panel 6 is provided on one side of the door 2 at the front of the housing 1, and the operation panel 6 includes a start switch 7, a display on/off switch 8, a cooking mode selection switch 9, and a button for directly manually inputting the timer time. Up switch IO, down switch 11, two-digit segment display 12 constituting display means, slide switch 13 for browning adjustment, high flame switch 14 for setting the heat generating load to a strong output state, and setting the heat generating load to a weak output state A low heat switch 15 is provided. Handles 16 are provided on both sides of the housing 1 so that it can be carried.

FIG. 2 shows the circuit configuration, and each part of this device is controlled by a microcomputer 21.

That is, a smoothing capacitor 24 is connected to a power plug 22 connected to a commercial AC power source via a rectifying diode 23, and a series circuit of a diode 25 and a voltage regulator diode 26 is connected in parallel to the smoothing capacitor 24, and a transistor is connected in parallel to the smoothing capacitor 24. 27, a stabilized power supply 29 consisting of a constant voltage diode 28 and the like is connected.

Then, the output of the stabilized power supply 29 is connected to the microcomputer 21 via a diode 30 through a VooffirF.
It is supplied as j.

Further, a lower heater 31 constituting a heat generating load is connected to the power supply plug 22 through the start switch 7, the first contact t1, and the second contact t2 in series. An upper heater 32 constituting a heat generating load is connected in parallel to the series circuit of the lower heater 31 and the first contact t1. Further, the power supply plug 22 is connected to the start switch 7 and the third contact t.
The series circuit of the upper heater 32 and the lower heater 31 is connected through the heater 3 in series.

Each of the contacts t1. t2. t3 opens and closes in response to the operation of the high flame switch 14 and low flame switch 15,
When both switches 14 and 15 are not operated, each contact j
l+t2. When all t3 are in the OFF state and the high flame switch 14 is operated, the first and second contacts tI+j2
is turned on and the third contact t3 is set to 0FFt. When the low heat switch 15 is operated, the third contact t3 is turned on and the first and second contacts 1. ．． 12 is turned off.

Further, a smoothing capacitor 3 is connected to the power supply plug 22 through the start switch 7 and the rectifying diode 33 in series.
4 is connected, and a diode 35 is connected to the smoothing capacitor 34.
A series circuit including the constant voltage diode 26 and the constant voltage diode 26 are connected in parallel. A solenoid 37 is connected in parallel to the smoothing capacitor 34 via an NPN transistor 36. The solenoid 37 is operated to hold the start switch 7 open. A surge absorbing diode 38 is connected in parallel to the solenoid 37.

Further, each segment display element 12a, 12b of the display device 12 is connected to the output terminal of the stabilized power source 29 via the display on/off switch 8. Further, the positive end of the output terminal of the stabilized power supply 29 is connected to the microcomputer 2 through the display on/off switch 8 and the resistor 39 in series.
1, and further connected to the common terminal 13c of the slide switch 13 via a diode 40.

The transistor 36 has its base connected to the Fo terminal of the microcomputer 21 through a resistor 41, and is grounded through a resistor 41.42 in series, and a resistor 41.43 and the display on/off switch 8 are connected in series. It is connected to the positive end of the output terminal of the stabilized power supply 29 through the power source 29.

A series voltage dividing circuit having a resistor of 44.45 is connected in parallel to the series circuit of the lower heater 31 and the second contact t2, and the resistor 4
5 and a diode 46 is connected in parallel with the illustrated polarity.

The base of an NPN transistor 47 is connected to the connection point between the resistors 44 and 45. The base of this transistor 47 is also connected to the cathode side of the rectifying diode 33 via a resistor 48. The transistor 47 has its emitter grounded, and its collector connected to the sense input terminal of the microcomputer 21 and to the cathode of the diode 30 via a resistor 49. Note that a capacitor 50 is connected in parallel to the transistor 47.

The cathode of the diode 30 is also connected to the F2 terminal of the microcomputer 21 via a resistor 51 and to the F3 terminal of the microcomputer 21 via a resistor 52.

The F2 terminal of the microcomputer 21 is also grounded through the up switch 10, the piezoelectric buzzer 53, and the diode 54 and the selection switch 9 in series. The F3 terminal of the microcomputer 21 is also grounded through the down switch 11, the piezoelectric buzzer 53, and the diode 55 and the selection switch 9 in series.

A series voltage divider circuit including resistors 56 and 57 is connected in parallel to the second contact t2, and a diode 58 is connected to the resistor 57 in parallel with the illustrated polarity. The base of an NPN transistor 590 is connected to the connection point between the resistors 56 and 57. The transistor 59 has its emitter grounded and its collector connected to the F1 terminal of the microcomputer 21.

One of the segment display elements 12a and 12b displays the second fold, and the other display element 12b displays the first fold. The display element 12a's S and C segments are connected to the Do terminal of the microcomputer 21, and the L, a, b, d, e, and g segments are connected to the D1 terminal of the microcomputer 21. Also, an by C+ of the display element 12b
The d+ e+ f+ g segments are connected to terminals D2 to D of the microcomputer 21, respectively. That is, the display cable 12a beam. The setting is such that only the C segment can be lit by the terminal output, and only the a, b, d, e, and g segments can be lit by the D1 terminal output.
Only the display will be performed.

In the display element 12b, all segments a to g can be lit by the output from the D2 terminal to D8 terminal, and rO
All numerical values from J to "9" can be displayed.

Further, seven terminals of the microcomputer 21, the glue terminal to the D6 terminal, are connected to the seven switching terminals of the slide switch 13, respectively.

Note that 60 is an oscillator that provides a reference clock to the microcomputer 21.

The microcomputer 21 has a timer set therein corresponding to three cooking modes: toast, pizza, and gratin. For example, when the power is turned on, the toast cooking mode is automatically selected and the timer is set accordingly. Time is set as a priority. In this state, when the selection switch 9 is operated and the inputs to the F2 and F3 terminals go to L level at the same time, the mode changes to pizza cooking mode, the corresponding timer time is set, and the selection switch 9 is operated repeatedly. Each time, the mode changes from gratin cooking mode to toast cooking mode to pizza cooking mode and repeat mode. In this way, the microcomputer 21 is provided with time setting means based on the selected cooking mode.

Further, the microcomputer 21 increases the timer time by, for example, one minute each time the F2 terminal changes to L level by operating the up switch 10, and increases the timer time by one minute each time the F3 terminal changes to L level by operating the down switch 11. The time is set down, for example, by one minute, and the timer time is manually set, for example, from one minute to a maximum of 29 minutes.

In addition, the microcomputer 21 reads the ON/OFF information of the start switch 7 from the sense input terminal as the collector output of the transistor 47. When the start switch 7 is in the OFF state, it operates an internal timer to count the time. When turned on, the count time of the internal timer is stored in the memory as an interval time.

Further, the microcomputer 21 subtracts and corrects the timer time set by the selection switch 9 or the up/down switches 10 and 11 based on the interval time stored in the memory, and adjusts the energization time to each heater 31, 32, which is a heat generating load. I'm trying to decide. Further, when the cooking mode by the selection switch 9 is set, the microcomputer 21 reads the setting state of the slide switch 13 and corrects the timer time according to the setting state.

Further, the microcomputer 21 has a transistor 47
The collector output of the transistor 59 is read from the sense input terminal, and the collector output of the transistor 59 is read from the F1 terminal.
It is designed to detect whether the heat generating load is in a no-output state, a weak output state, or a strong output state.

Further, when the microcomputer 21 detects a no-output state of the heat generating load or when a weak output state is detected while the cooking mode is set by the selection switch 9, the microcomputer 21 performs error processing and prohibits the operation of the transistor 36. The power supply is held and the power supply to the heat-generating load is prohibited and controlled.

Further, the microcomputer 21 operates when the heating load is in a strong output state when the cooking mode is set by the selection switch 9, and when the timer time is set by the up and down switches 10 and 11. When it is not in a non-output state, an H level signal is output from the Fo terminal for the finally determined energization time to turn on the transistor 36 and control the energization to the heat generating load. That is, the microcomputer 21 is provided with load energization control means.

Further, the microcomputer 21 has a selection switch 9.
When power is started to be applied to the heat generating load with the cooking mode selected and set in , the cooking mode display displayed on the display 12 is switched to a numerical display of the remaining energization time, and the display method of the display 12 is changed continuously. I am trying to switch from a lit light to a blinking light.

Therefore, when the heat generating load is energized, the display on the display 12 flashes while subtracting the energization time. In this way, the microcomputer is provided with display control means.

Furthermore, when the power supply to the heat-generating load is finished, the microcomputer 21 sets the internal repeat memory to set the timer time set this time again, and switches the display 12 to indicate the currently selected setting on the display element 12b. The symbol indicating the cooking mode is lit continuously again. That is, the microcomputer 21 is provided with repeat control means.

The microcomputer 21 is set to perform the processing shown in FIG. 3 based on program data. That is, when the power is turned on, first, the toast cooking mode is set preferentially, and only the a segment of the display element 12b is controlled to light up, and the content of the set cooking mode is indicated by a symbol.

Next, it is checked whether the selection switch 9 has been turned on, and when it has been turned on, the cooking mode is changed from toast to pizza to gratin, and the display element 12
The symbol display for b is sequentially switched between lighting of the g segment and lighting of the d segment. Also selection switch 9
If there is no operation, it is checked whether the repeat memory is set, and if it is set, the repeat value set in the memory is read out and set as the timer time.

Subsequently, the operation of the up and down switches 10 and 11 is checked, and if this switch is operated, processing is performed according to the up and down routines. That is, the timer time is changed manually.

Also, if this switch is not operated, the timer time will not be changed. And cooking mode or timer time a, g
, d is displayed on the display element 12b by segments or numerical values.

Note that the display on each display element 12a, 12b is performed when the display on/off switch 8 is in the ON state, and when this switch 8 is in the OFF state.
No display is performed during the status.

Subsequently, it is checked whether or not the start switch 7 has been turned on, and if it has not been turned on, an interval routine is performed to count the interval time.

Furthermore, when the start switch 7 is turned on, each contact t
It is checked whether all l+j2+t3 are in the OFF state, that is, the heat generating load is in a non-output state. If there is a non-output state, error processing is performed, an error is displayed, and output from the Fo terminal is prohibited and maintained.

Moreover, each contact point t,, t2. If t3 is in a weak output state (only contact t3 is ON) or a strong output state (contact tl + t2 is ON), then the selection switch 9 is used to check whether the cooking mode is selected and set, and the cooking is started. If the mode is set, it is checked whether the heat generating load is in a strong output state. If it is not in a strong output state, error processing is performed and an error display is performed, and output from the F terminal is prohibited and maintained. In addition, if it is in a strong output state, the browning setting value by the slide switch 13 is changed to A/
D conversion is performed and the read timer time is corrected according to the set value.

You can also set the timer time by switching up and down.

When manual setting is performed by chips 10 and 11, the set timer time is separately set in a memory as a repeat time.

Next, the timer time set by the cooking mode or manual operation is subtracted and corrected based on the interval time stored in the memory, and the final timer time is
In other words, the energization time of the heat generating load is determined.

Next, an H level signal is output to the Fo terminal, and transistor 3
6 is turned on to turn on the solenoid 37. Next, the state of the important display switch 8 is read, and if the switch 8 is OFF, the solenoid 37 is immediately controlled to be OFF.

Further, if the display on/off switch 8 is in the ON state, the energization time is displayed while each display element 12a, 12b blinks, and the timer is counted down. That is, each display element 12a, 12b begins to decrease its numerical display while blinking.

When the remaining time reaches one minute, a signal is output from the F2 terminal to make the piezoelectric buzzer 53 sound for a certain period of time. Furthermore, when the timer counts down and the time is up, a repeat memory is set and the piezoelectric buzzer 53 sounds for a certain period of time. Then, the solenoid 37 is turned off to end the roasting operation.
The routine returns to the determination of selection switch 9.

Note that a limit time is set for the interval time that can be corrected, and when the interval exceeds this time, the interval time is cleared. At this time, the repeat memory and the separate memory in which the repeat value is set are also cleared.

In this embodiment with such a groove configuration, the power plug 22
When connected to a commercial power supply, power is supplied to the microcomputer 21, and the computer 21 operates, prioritizes the toast cooking mode, tests it, and sets its timer time.

When the display on/off switch 8 is turned ON in this state, a segment drive signal is output to the D2 terminal, and the a of the display element 12b is output.
The segment lights up continuously to notify you with a symbol that the toast cooking mode is set.

If you operate the high flame switch 14 in this state, the first and second contacts t1+t2 will turn ON, and the third contact t3 will turn OFF.
do. Thus, the lower heater 31 and the upper heater 32 are connected in parallel, and the parallel circuit is connected to a commercial power source.

When the preparation is completed and the start switch 7 is turned on, the commercial frequency is applied to the base of the transistor 47, so the transistor 47 turns on and off, and the signal is input to the sense input terminal. Further, since the base of the transistor 59 becomes approximately ground potential and is turned off, an H level signal is inputted from its collector to the F1 terminal. Thus, the microcomputer 21 determines that the heat generating load is in a strong output state based on the ON/OFF signal from the sense input terminal and the H level signal from the F1 terminal. The microcomputer 21 also reads the settings of the slide switch 13.

Therefore, the microcomputer 21 corrects the timer time preset in the toast cooking mode according to the browning setting by the slide switch 13, and also changes the start switch 7 from the end of the previous energization set in the memory. The energization time for each heater 31, 32 is determined by correcting it according to the interval time until turning on. Then, an H level signal is output to the Fo terminal to operate the transistor 36 and the ONL solenoid 37 to keep the start switch 7 in the ON state. Therefore, even if the user operates the start switch 7 and releases it, the switch 7 remains ON.
The state is maintained and each heater 31 and 32 begins to generate heat.

The energization of each heater 31 and 32 is continued for the energization time thus set, and the roasting operation is performed. Also, at this time, the display state of the display 12 is changed, and each display element 12a, 12b begins to display the remaining energization time while blinking. Therefore, initially, the energization time determined by the toast cooking mode is displayed. The displayed energization time is decremented every minute, and when one minute is left, the buzzer 53 operates to notify the user, and when the set energization time has elapsed, the microcomputer 21 starts the repeat memory. After setting, the buzzer 53 is operated once again to notify the user, and the output from the Fo terminal is inverted to L level, and the transistor 36 is set to 0FFL solenoid 3.
7 and the start switch 7 is turned OFF to stop this toast roasting operation. At the same time, an internal timer is operated to start counting the interval time.

When the roasting operation is completed, the toast cooking mode is reset by setting the repeat memory, and the timer time corresponding to that mode is set, and the display 12 is switched again, and the display element 12b lights up the a segment continuously. The toast cooking mode will now be displayed symbolically.

In this way, when the cooking mode is set, the symbol indicating the set cooking mode is displayed on the display 12 by continuously lighting the segment, and when the power supply to the heat generating load is started, the display 12 shows the remaining power supply time. Since the display is performed by blinking, it is possible to easily check the cooking contents and the remaining energization time using the same display 12.

Furthermore, when the roasting operation is completed, the originally set cooking mode is set again, the corresponding timer time is set again, and the symbol indicating the set cooking mode is displayed again on the display 12, so that the same When cooking continuously, there is no need to set the cooking mode again, and the settings can be reconfirmed, making it easy to use.

In addition, when the selection switch 9 is operated in the initial $ preparation stage, the cooking mode changes from toast to pizza, the timer time is also changed according to the content, and the display element 12b is changed.
The display also changes from the a segment to the g segment. Further, by operating the selection switch 9 twice or three times, the cooking mode changes from pizza to gratin and from gratin to toast.

In accordance with this, the timer time is changed and the display on the display element 12b also changes from d segment to a segment.

In this way, cooking settings can be easily changed.

In addition, when the up switch 10 and down switch 11 are operated in the preparation stage, each display element 12a, 12b is set to 1.
The up and down times are displayed in minutes, and the microcomputer 21 also sets the displayed time as the timer time. In this way, the timer time can also be set by manual operation.

Further, the energization control for each heater 31, 32 is performed based on the energization time determined by correcting the timer time set in advance by the interval time from the end of the previous energization and the browning setting by the slide switch 13. Therefore, for example, when the roasting operation is performed continuously, the roasting operation can always have a constant browning color and the roasting operation can be performed with high accuracy.

In the embodiment described above, the cooking mode settings are displayed symbolically using the a, g, and d segments of the display element, but it is needless to say that the present invention is not limited to this. Further, in the above embodiment, the cooking mode is displayed in continuous lighting and the remaining time is displayed in flashing mode, but the method is not necessarily limited to this, and the opposite may be used.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to easily confirm the setting of the cooking content through the display, and it is also possible to easily confirm the remaining time when the power is turned on, and both display confirmations can be performed using a common display means. It is possible to provide an automatic roasting device that can be used.

Further, according to the present invention, when the roasting operation is completed, the timer setting contents and display contents return to the initial settings, thereby providing an easy-to-use automatic roasting apparatus.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view showing the external appearance, FIG. 2 is a circuit diagram, and FIG. 3 is a flowchart showing processing by a microcomputer. 7...Start switch, 9...Selection switch, 1
2...Segment display, 21...Microcomputer, 31...Lower heater, 32...Upper heater, 3
6...N P N type 1 transistor, 37... Solenoid.

Claims (2)

[Claims] (1) A selection switch for selecting a cooking mode, a time setting means for automatically setting a timer time according to the selection operation of the selection switch, and a display means for displaying the cooking mode selected and set by the selection operation of the selection switch. a heat generating load; and load energization control means for controlling energization to the heat generating load according to a timer time set by the time setting means.
When the load energization control means starts energization control for the heat generating load, the display on the display means is switched from the cooking mode display to the remaining time display, and the display method is changed from the display method when the cooking mode is displayed. An automatic roasting device characterized by comprising a display control means for changing. (2) A selection switch for selecting a cooking mode, a time setting means for automatically setting a timer time according to the selection operation of the selection switch, and a display means for displaying the cooking mode selected and set by the selection operation of the selection switch. a heat generating load; and load energization control means for controlling energization to the heat generating load according to a timer time set by the time setting means.
When the load energization control means starts energization control for the heat generating load, the display on the display means is switched from the cooking mode display to the remaining time display, and the display method is changed from the display method when the cooking mode is displayed. and a repeat control means for returning the timer setting state and the display state of the display means to the initial setting state when the load energization control means finishes controlling the energization of the heat generating load. An automatic roasting device featuring: