JP3330058B2 - Cooking 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 heating cooker in which the supply of control power to control means for controlling the cooking of an object to be cooked is improved.

[0002]

Conventionally, in a heating cooker provided with a microcomputer as a control means, for example, a microwave oven, a key input waiting operation is performed even in a standby state in which heating cooking is not performed. The control power is always supplied to the microcomputer.

However, the actual use time of a microwave oven in one day is extremely short, and the standby time is long. Conversely, the ratio of the power consumed by the microcomputer during the standby time cannot be ignored.

As a conventional technique for solving such a problem, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 7-217906. In this conventional technique, when a door is opened to put food into a heating chamber of a microwave oven and supply of control power to a microcomputer (microcomputer) of a control circuit is started, the microcomputer immediately turns on a relay. By doing so, the control power supply is continuously performed.

However, in such a system, when the door of the heating chamber is simply opened / closed and cooking is not actually performed thereafter (for example, when the user stops cooking, or when a child is mischievous). ), The control power is continuously supplied to the microcomputer for a certain period of time, and the effect of suppressing power consumption during standby is not sufficient. The present invention has been made to solve the above problems, and an object of the present invention is to provide a heating cooker capable of reliably suppressing power consumption during standby.

[0006]

According to a first aspect of the present invention, there is provided a heating cooker having a heating chamber, a door for opening and closing an opening of the heating chamber, and a heating chamber. Control means for controlling the cooking of the object to be cooked, wherein the control means is configured such that the control power is supplied only when the door is in the open state, and from the time when the door is in the open state. When a certain period of time has elapsed after detecting the open state a plurality of times, the power supply means configured to continuously supply the control power is turned on. It is characterized by the following.

With this configuration, when the door for opening and closing the entrance of the heating chamber is opened, supply of the control power to the control means is started, and when a certain time elapses from that time, the control means is turned off. By turning on the power supply means, the control power supply to itself is continuously performed.

Accordingly, in the standby state, the supply of the control power to the control means is not performed, and the supply of the control power is started only when the door is opened and cooking is actually started. In addition, the control power supply is self-established by the control means so as to be continuously performed after a lapse of a predetermined time from the start of the supply, so that control is performed simply by opening and closing the door within the predetermined time. The power for use is not supplied continuously, and power consumption can be reliably suppressed. The control means checks that the door is open.
When a certain period of time has passed when
Thus, measurement for a certain time can be easily performed.

[0009]

Further, as described in claim 2, the control means, when the control power at the time or itself to the power supply means to the ON state is not performed cooked within a predetermined time period from the time when the supply has been started In such a case, the power supply means may be turned off. With such a configuration, the effect of suppressing unnecessary power consumption can be further enhanced.

[0011] As described in claim 3 , the control means includes:
When the cooking is performed, it is preferable that the power supply unit be turned off after the completion of the cooking and after a lapse of a set time set according to the type of the cooking. With such a configuration, for example, when cooking is performed in which the heating time is long and the temperature in the heating chamber is high, the display such as "high temperature warning" is displayed by the control unit by setting the set time to be long. A control power is supplied so that the display means can perform the operation for a necessary time.

[0012] As described in claim 4 , the control means includes:
The power supply means may be maintained in an on state on the condition that the door is closed after the completion of the started cooking or after the cancellation. With such a configuration, the control power is supplied to the control means as long as cooking is completed and the object to be cooked in the heating chamber is not taken out.
It is possible to take measures to prevent forgetting to take out the food in the heating chamber.

[0013] As described in claim 5 , the control means includes:
The power supply means may be maintained in an on state on condition that the temperature in the heating chamber exceeds a certain temperature. If Such a configuration, as long as the temperature of the heating chamber is not below a predetermined temperature, the control power is supplied to the control means, the same effect as claim 3 is obtained.

According to a sixth aspect of the present invention, there is provided an open / close detecting means for detecting a door open / close state and outputting a detection signal to a control means, a power supply circuit for supplying a control power supply to the control means, and a commercial AC power supply. A door switch provided between the power supply circuit and the door switch, the door switch being turned on and off in response to opening and closing of the door. Power supply means is provided in parallel with the door switch, and is constituted by switching means which is turned on and off by the control means. You may. With this configuration, when the door is opened and the door switch is turned on,
The power supply circuit and the commercial AC power supply are connected, supply of control power to the control unit is started, and the control unit controls ON / OFF of the switching unit according to a predetermined condition, so that the control unit only determines when it is necessary. Since the control power supply is supplied to itself, the object can be achieved with a simple configuration.

With this configuration, when the door is opened and the door switch is turned on, the power supply circuit and the commercial AC power supply are connected, and the supply of the control power supply to the control means is started. The means supplies control power to itself only when it is determined necessary by controlling on / off of the switching means in accordance with a predetermined condition, so that the object can be achieved with a simple configuration.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a perspective view showing an appearance of a microwave oven as a heating cooker. This figure 2
In the above, a heating chamber for accommodating food or the like to be cooked and heating and cooking is provided inside the microwave oven main body 1. At the front of the heating chamber, an opening (access port) for taking in and out food is provided, and this opening is configured to be opened and closed by a door 2.

An operation panel 3 is provided at the right end of the front surface of the range main body 1. On the front surface of the operation panel 3, a display 4 for displaying cooking settings, cooking time, and the like are provided. An input key 5 for setting cooking is provided.

FIG. 1 shows an electric configuration of a microwave oven. In FIG. 1, the power plug 6
V is connected to an outlet (not shown), which is a commercial AC power supply of V. One terminal is connected to a power line 10 via a fuse 7, a thermal switch 8, and a door switch 9 in series, and the other terminal is connected to the other. Are connected to the power line 13 via the normally open contact 12a of the door switch 11 and the first relay 12 in series. A short switch 14 is connected between the power line 10 and a common connection point of the door switch 11 and the normally open contact 12a.

In this case, the thermal switch 8 detects the temperature of the magnetron 15, and is turned off when the detected temperature rises to an abnormal value. The door switches 9 and 11 are turned off when the door 2 that opens and closes the heating chamber of the microwave oven is opened, and the short switch 14 is turned off when the door 2 is closed.

A fan motor 1 is provided between the power lines 10 and 13.
6, a series circuit of an upper heater 17 for heating the heating chamber and a normally open contact 18a of the second relay 18, and a lower heater 19 for heating the heating chamber and a normally open circuit of the third relay 20. RT motor 21 and fourth relay 22 for rotating a rotary circuit in a heating circuit and a series circuit with contact 20a
Is connected to a normally open contact 22a.

A series circuit of a normally open contact 23a of a fifth relay 23 and a primary coil 24a of a high voltage transformer 24 is connected between the power supply lines 10 and 13. One terminal of the secondary coil 24b of the high voltage transformer 24 is connected to the anode of the magnetron 15 and grounded, and both terminals of the cathode serving as a heater of the magnetron 15 are connected to both terminals of the secondary coil 24c of the high voltage transformer 24. It is connected to the.

The high-voltage condenser 25 is composed of two condensers 25a and 25b. Capacitor 25a
Is connected to the secondary coil 24b of the high-voltage transformer 24.
And the other terminal of the capacitor 25a is connected to one terminal of the cathode of the magnetron 15 and to the anode of the magnetron 15 via the high voltage diode 26.

One terminal of the capacitor 25b is
The capacitor 2 is connected via the normally open contact 27a of the high voltage relay 27.
5a, and the other terminal is directly connected to the other terminal of the capacitor 25a.

A relay 1 is connected to each output terminal of a microcomputer (hereinafter referred to as a microcomputer) 28 serving as control means.
2, 18, 20, 22, 23 and 27 exciting coils 12
C, 18C, 20C, 22C, 23C and 27C are connected. It should be noted that the excitation coils 12C, 1
Substantial connections of 8C, 20C, 22C, 23C and 27C are omitted. Further, the output terminal of the microcomputer 28 is connected to the display device 4 as a display means, and each input terminal is connected to the input key 5 and a temperature sensor 29 composed of, for example, a thermistor and configured to detect the temperature in the heating chamber.

The output terminal of the power supply circuit 30 is connected to the microcomputer 28
Power supply terminal. One input terminal of the power supply circuit 30 is connected to a common connection point of the power line 10 between the thermal switch 8 and the door switch 9, and the other input terminal is connected to a common connection between the power plug 6 and the door switch 11. At the point, the normally open contact of the sixth relay 31 (power supply means,
(Switching means) 31a. The exciting coil 31C of the relay 31 is connected to the output terminal of the microcomputer 28 like other relays.

The power supply circuit 30 steps down and rectifies the commercial AC power, generates a control power of, for example, 5 V DC, supplies it to the microcomputer 28, and detects the frequency (50 or 60 Hz) of the commercial AC power. Output to the microcomputer 28.

The door switch 32 is connected in parallel to the normally open contact 31a of the relay 31, and is turned off and on in conjunction with the on and off of the door switches 9 and 11. The reset circuit 33 outputs a reset signal to the microcomputer 28 when power is supplied from the power supply circuit 30.

A door signal circuit (open / close detection means) 34
Is connected to the power supply line 10, and the other terminal is connected to a common connection point between the input terminal of the power supply circuit 30 and the normally open contact 31 a of the relay 31. The door signal circuit 34 outputs a high signal (5
V) and a low level (0 V) detection signal (door signal) is output to the microcomputer 28.

FIG. 1 shows the circuit connection when the door 2 is in the closed state. In this state, the normally open contact 31a of the relay 31 and the door switch 32 are both off, and the power plug 6 AC power supply through the power supply circuit 30
, And the microcomputer 28 has stopped operating.

Next, the operation of the present embodiment will be described with reference to FIGS. FIG. 3 is a flowchart showing the control contents of the microcomputer 28. When the microwave oven door 2 is opened by the user, the door switches 9 and 11 are turned off from on (see FIG. 4A). Then, the door switch 32 is turned on, and the power supply circuit 30 is turned on.
Is supplied with commercial AC power.

The power supply circuit 30 generates and supplies a control power supply when a commercial AC power supply is supplied (see FIG. 4B). For example, after several hundred milliseconds, the reset circuit 3
When the reset signal of No. 3 changes from the low level to the high level (see FIG. 4C), the microcomputer 28
The process is started according to a control program stored in a built-in ROM (not shown) (“start”).

Then, the microcomputer 28 refers to the output signal of the door signal circuit 34 in the processing step S1 of "door signal detection". The level of the door signal output by the door signal circuit 34 is 0 V when the door 2 is in the closed state and the commercial AC power is not supplied to the power supply circuit 30, and the door 2 is opened from that state. When this happens, the door switch 9 is turned off, so that one terminal is open and again shows 0V.

That is, in this step S1, if the level of the door signal detected by the microcomputer 28 is 0V, it indicates that the door 2 is open, and the microcomputer 28 indicates that the level of the door signal is 0V. Upon detection, a software counter indicating the number of detections is incremented.

The microcomputer 28 then asks "n times 0V?"
Then, the process proceeds to step S2, where the level of the door signal is 0.
It is determined whether or not V has been detected n times, and “NO”
If the judgment is made, the process shifts to step S1, and further detection is performed. During the loop of steps S1 and S2, the detection of the level of the door signal is performed once at time t1.

At the decision step S2, the microcomputer 28
However, if the level of the door signal is detected to be 0 V n times (n is a natural number) and it is determined to be "YES", the process proceeds to "relay on" processing step S3. As described above, the time t2 elapses by turning the loop of steps S1 and S2 until the door signal level is detected to be 0V n times (see FIG. 4D), and the door 2 is opened. From the time point, a time t3 which is a fixed time (about 1 second, FIG. 4E)
See).

In the processing step S3, the microcomputer 28
Supplies an excitation signal to the excitation coil 31C of the relay 31 via a drive circuit (not shown) to turn on the normally open contact 31a (see FIG. 4E). Then, thereafter, even when the door 2 is closed and the door switch 32 is turned off, the commercial AC power is continuously supplied to the power supply circuit 30 and the control power for the microcomputer 28 is also continuously supplied.

Here, in the determination step S2, the time t3 is secured until the microcomputer 28 determines "YES" because the door 2 is opened when cooking is actually performed by the microwave oven. This is because a series of operations of closing the door 2 after putting food or the like into the heating chamber is expected. That is, if the door 2 is simply opened and closed within the time t3, it is considered that there is a low possibility that the cooking is actually performed thereafter, and the normally open contact 31a of the relay 31 is considered.
Do not turn on.

If the door 2 is closed before the microcomputer 28 determines "YES" in the judgment step S2, the door switches 9 and 11 are turned on, and the door switch 32 is turned off. , Power supply circuit 30
Supply of commercial AC power to the
The supply of control power to the controller is also stopped.

The microcomputer 28 shifts from step S3 to step S4 of "timer setting t = 0" to determine, for example, the number of timer interrupts generated at regular intervals by a system timer (not shown) in the interrupt processing routine. A software timer to be counted (hereinafter simply referred to as a timer) is reset and set to “0”. Then, the process proceeds to a judgment step S5 of "Does door open / close?"

At the decision step S5, the microcomputer 28
Determines from the output signal of the door signal circuit 34 whether or not the door 2 has been opened / closed, and determines "NO" if the door 2 is not opened / closed (in this case, it does not change from the open state to the closed state). Then, the process proceeds to the judgment step S6 of "key input?" In the determination step S6, the microcomputer 28 determines whether any of the input keys 5 of the operation panel 3 has been operated, and if no input key 5 has been operated and determines “NO”, the next “t” = T4? ”.

In the judgment step S7, the microcomputer 28
Refers to the timer reset in step S4 to determine whether or not a set time t4 (for example, 5 minutes) has been reached. If it is determined that the time t4 has not reached and “NO”, the process proceeds to step S5.

That is, from the time of step S4, if the door 2 is not opened / closed and none of the input keys 5 are operated, the loop of steps S5 to S7 is continued. In this state, the time t measured by the timer is t4
(See FIG. 4E), the microcomputer 28 determines "YES" in the determination step S7, and shifts to the "relay off" processing step S8.

In the processing step S8, the microcomputer 28
When the normally open contact 31a is turned off by turning off the exciting coil 31C of the relay 31, as shown in FIG. 4E, the process ends. Thereafter, when the user closes the door 2, the door switches 9 and 11 are turned on, the door switch 32 is turned off, and the power supply circuit 30 is turned off.
Also, the supply of control power to the microcomputer 28 is stopped.

If the door 2 is closed between the time point and the time shown in FIG. 4, the microcomputer 28 proceeds to step S5.
Is determined to be "YES", the process proceeds to step S4, at which point the timer is reset to "0". Then, if any of the input keys 5 of the operation panel 3 is operated between the time point and the time point, the microcomputer 28 determines in step S6 that “YE
S ”, and proceeds to the processing step S9 of“ cooking control ”.

In the processing step S9, the microcomputer 28
Controls heating cooking according to the operation of the input key 5.
For example, if range cooking is set, relays 12 and 22 are set.
And 23 are energized to turn on the normally open contacts 12a, 22a and 23a.
Then, when the normally open contacts 12a and 22a are turned on, the fan motor 16 and the RT motor 21 operate, and the cooling fan and the rotating base (not shown) rotate.

Further, when the normally open contact 23a of the relay 23 is turned on, a power supply voltage is applied to the primary coil 24a of the high voltage transformer 24, and a high voltage is induced in the secondary coil 24b. Then, the magnetron 15 oscillates to generate microwaves, and the microwaves are supplied into the heating chamber, thereby starting microwave cooking.

When heater cooking is set by operating the input key 5, the exciting coils 12C, 18C and 20C of the relays 12, 18 and 20 are energized to turn on the normally open contacts 12a, 18a and 20a. . Then, when the upper and lower heaters 17 and 19 are energized, heater cooking is started. The heating by the heaters 17 and 19 is adjusted while monitoring the temperature in the heating chamber by the temperature sensor 29.

Thereafter, until the microcomputer 28 determines "YES" due to the lapse of a predetermined cooking time in the next "Cooking complete?" Is determined to be "YES", the process proceeds to step S4, and the timer is cleared at the end of cooking. Thereafter, as described above, when the timer reaches time t4, the relay 31
Is turned off, and the supply of control power to the microcomputer 28 is stopped.

The microcomputer 28 operates in accordance with the frequency (50, 60 Hz) of the commercial AC power obtained from the power circuit 30.
The normally open contact 27 a of the high voltage relay 27 is controlled to be on / off to switch the capacity of the high voltage capacitor 25. That is, when the power supply frequency is 60 Hz, the normally open contact 2
7a is turned off and the capacity of the capacitor 25 is changed to the capacity of the capacitor 2
When the power supply frequency is 50 Hz, the normally open contact 27a is turned on so that the capacity of the capacitor 25 is increased to the large capacity of the capacitors 25a and 25b.

As described above, according to this embodiment, the power supply circuit 30 is connected to the door switch 32 which is turned on only when the door 2 is opened, in conjunction with the turning off of the door switches 9 and 11. Supply commercial AC power to the microcomputer 2
8 so that the control power is supplied to the microcomputer 2.
The relay 8 connected to the door switch 32 in parallel with the door switch 32 when a predetermined time t3 has elapsed by detecting that the door 2 is open a plurality of times after the door 2 is opened. The normally open contact 31a is turned on to supply the control power continuously.

Therefore, when the microwave oven is on standby,
No power is consumed by the microcomputer 28. Further, if cooking is not actually performed simply by opening and closing the door 2 of the heating chamber within the time t3, the normally open contact 31a of the relay 31 is not turned on. Power is not continuously supplied, and unnecessary power consumption can be reliably suppressed by a simple configuration. In addition, the measurement of the fixed time t3 can be easily performed.

Further, according to the present embodiment, the microcomputer 28
When the cooking is not performed within a predetermined time from the time when the normally open contact 31a of the relay 31 is turned on or the time when the control power is supplied to itself, the normally open contact 31
Since a is turned off, the effect of suppressing unnecessary power consumption can be further enhanced.

FIG. 5 shows a second embodiment of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only the different parts will be described below. The configuration of the second embodiment is the same as that of the first embodiment, and the control contents of the microcomputer 28 are different.

That is, in FIG. 5 showing a flowchart of the control contents of the microcomputer 28, the step S10 in the first embodiment is replaced by a judgment step S10a of "finish cooking or cancel cooking?" Then, in the judgment step S10a, if the predetermined cooking time has elapsed by the microcomputer 28, or if the cooking being executed is canceled by turning on the “cancel cooking” key of the input keys 5, The determination is "YES", and the process proceeds to the determination step S11 of "Does door open / close?"

In the judgment step S11, the microcomputer 2
8 determines whether the door 2 has been opened or closed from the output signal of the door signal circuit 34, as in step S5, and determines whether the door 2 has not been opened or closed (in this case, if the door 2 has not changed from the closed state to the open state). ) "NO" is determined, and the process proceeds to the determination step S12 of "key input?" If the door 2 is changed from the closed state to the open state and the determination is "YES", the process proceeds to step S4.

In the determination step S11, if the microcomputer 28 stops operating in a state where the object to be cooked is not taken out of the heating chamber and no display is displayed on the display 4, the user will Since you may forget that the food is still in the room,
Until the door 2 is opened, the supply of control power is reliably maintained.

In step S12, the microcomputer 28 determines whether any of the input keys 5 on the operation panel 3 has been operated, similarly to step S6, and operates any of the input keys 5. If "NO" is determined, the process proceeds to step S11. If any of the input keys 5 is operated to determine "YES", the process proceeds to step S4. Here, when the user cancels the cooking in step S10a, the input key 5 is operated without opening the door 2 and removing the food or the like in the heating chamber,
Since the cooking setting may be redone, step S
At 12, the user waits until the input key 5 is operated.

As described above, according to the second embodiment, the microcomputer 28 determines whether the normally open contact 3 of the relay 31 is closed if the door 2 is in the closed state after the started cooking is completed or canceled.
1a is kept closed, so long as the cooking is completed and the object to be cooked in the heating chamber is not taken out, the microcomputer 28
Since the control power is supplied to the control unit, measures to prevent the user from forgetting to remove the object to be cooked, such as displaying "forgetting to remove" on the display 4, can be taken.

FIG. 6 shows a third embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. Only the different parts will be described below. The configuration of the third embodiment is the same as that of the first embodiment, and the control contents of the microcomputer 28 are different. That is, in FIG. 6 showing a flowchart of the control contents of the microcomputer 28, step S
A determination step S13 of "is the heating chamber temperature high?" Is inserted between Steps 7 and S8, and the other steps are the same as those in the first embodiment.

For example, if the microcomputer 28 determines "YES" in step S7 after a lapse of the time t4 after the heating and cooking is completed, the microcomputer 28 detects the temperature in the heating chamber by the temperature sensor 29 in the determination step S13. Then, it is determined whether the temperature is high (for example, about 60 degrees), and the temperature in the heating chamber is sufficiently lowered (6).
If it is less than 0 degrees), it is determined as "YES" and the process proceeds to step S8.

That is, in the microwave oven, since the heating chamber after heating and cooking is relatively hot, the microcomputer 28
Is to display a message such as "Caution for high temperature" on the display 4. Therefore, if the supply of the control power supply to the microcomputer 28 is interrupted and the display is not performed even though the temperature in the heating chamber is high, the user may open the door 2 in that state. Therefore, in order to prevent such a situation from occurring, the judgment step S
At 13, the level of the temperature inside the heating chamber is determined.

As described above, according to the third embodiment, the microcomputer 28 controls the normally open contact 31 of the relay 31 after the elapse of the time t4 after the completion of cooking while the temperature in the heating chamber is high.
a is maintained in the on state, and the control power supply is supplied to itself. Therefore, when cooking is performed in which the heating time is long and the temperature in the heating chamber becomes high, the microcomputer 28 displays the display 4.
Can be displayed for a required time only, and it is possible to prevent the user from opening the door 2 despite the high temperature in the heating chamber.

The present invention is not limited to the embodiment described above and shown in the drawings, and the following modifications or extensions are possible. When cooking is performed, the microcomputer 28 controls the normally open contact 31 of the relay 31 after the completion of the cooking and after a lapse of a set time set according to the type of the cooking.
a may be turned off. That is, the time t4 in step S7 can be changed. According to this configuration, for example, when cooking is performed in which the heating time is long and the temperature in the heating chamber is high, the setting time is set longer, and the microcomputer 28 displays the same as in the third embodiment. It is possible to cause the container 4 to display a message such as "warning attention" for a required time. Instead of securing the fixed time t3 by detecting that the door 2 is open n times in steps S1 and S2, the fixed time t3 may be measured by a timer.

When measuring the time t4, instead of counting the number of timer interrupts by a software counter, a dedicated counter as hardware may be used to measure the time t4 by referring to the counter value. The measurement of the predetermined time is performed by the normally open contact 3 of the relay 31 in step S3.
The measurement is not limited to being performed from the time when 1a is turned on, but may be started from the time when the microcomputer 28 is turned on (that is, after “start” in the flowchart shown in FIG. 4). The switching means is a relay 31
Not limited to the normally open contact 31a, a semiconductor element such as a triac may be used.

[0065]

Since the present invention is as described above,
The following effects are obtained. According to the cooking device of the first aspect, the control means is configured such that the control power is supplied only when the door that opens and closes the entrance is in an open state, and the power supply means is configured such that the door is From the point when it is opened,
The control power is supplied continuously to the control means during standby by turning on the power supply means when a predetermined time has elapsed after detecting that the control power has been detected a plurality of times. Therefore, power consumption during standby can be suppressed. In addition, when cooking is not actually performed simply by opening and closing the door of the heating chamber within a certain time, the control power is not continuously supplied to the control means. Power consumption can be reliably suppressed.
Then, the control means checks that the door is open.
Easy to measure for a certain period of time by detecting multiple times
Can be.

[0066]

According to the heating cooker of the second aspect , the control means does not perform cooking within a predetermined time from the time when the power supply means is turned on or the time when the control power supply to itself is started. In this case, since the power supply unit is turned off, the effect of suppressing unnecessary power consumption can be further enhanced.

According to the third aspect of the present invention, when the cooking is performed, the control means, after the completion of the cooking,
Since the power supply means is turned off after the elapse of the set time set according to the type of cooking, for example, when cooking is performed in which the heating time is long and the temperature in the heating chamber is high, the set time is reduced. By setting the length to be long, it is possible to display, for example, "warning for high temperature" for a required time.

According to the fourth aspect of the present invention , the control means keeps the power supply means on after the completion of the started cooking or after the cancellation, provided that the door is closed. Therefore, as long as cooking is not completed and the object in the heating chamber is not taken out, the control power is supplied to the control means. Therefore, measures to prevent forgetting to take out the object in the heating chamber are taken. Can be applied.

According to the fifth aspect of the present invention , the control means maintains the power supply means in the on state on condition that the temperature in the heating chamber exceeds a certain temperature. by controlling power supply is supplied to the control means unless below a predetermined temperature, claim 3
The same effect can be obtained.

According to the sixth aspect of the present invention , when the door is opened and the door switch is turned on, the power supply circuit and the commercial AC power supply are connected, and the control means starts supplying the control power supply. The control means controls the switching means on and off in accordance with a predetermined condition, and supplies control power to itself only when it is determined that it is necessary. it can.

[Brief description of the drawings]

FIG. 1 is an electrical configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of a microwave oven.

FIG. 3 is a flowchart showing control contents of a microcomputer.

FIG. 4 is a time chart showing control contents of a microcomputer;

FIG. 5 is a view corresponding to FIG. 3, showing a second embodiment of the present invention;

FIG. 6 is a view corresponding to FIG. 3, showing a third embodiment of the present invention.

[Explanation of symbols]

2 is a door, 28 is a microcomputer (control means),
Reference numeral 30 denotes a power supply circuit, 31 denotes a relay, 31a denotes a normally open contact (power supply means, switching means), 32 denotes a door switch, and 34 denotes a door signal circuit (open / close detection means).

Claims (6)

(57) [Claims] 1. A heating chamber, a door for opening and closing an entrance of the heating chamber, and a control means for controlling cooking of an object stored in the heating chamber, wherein the control means includes: The control power is supplied only when the door is open. From the time when the door is opened , it is detected that the door is open a plurality of times. A heating cooker characterized by turning on a power supply means configured to continuously supply the control power when the time has elapsed. 2. The control means turns on the power supply means.
At the point of time when the control power supply to itself starts
If cooking is not performed within a predetermined time from,
The power supply means is turned off.
The heating cooker according to 1. 3. The control means, when cooking is performed,
After the end of the cooking, it is set according to the type of the cooking.
Turn off the power supply after the set time has elapsed
The heating cooker according to claim 1, wherein: 4. The control means is provided after the end of the started cooking.
Or the door must be closed after cancellation
Maintaining the power supply means in the on state
The cooking device according to any one of claims 1 to 3. 5. The control means according to claim 1, wherein said control means is provided after the completion of said cooking.
After the cancellation, the temperature in the heating chamber exceeds a certain temperature.
Power supply means on, provided that
4. The method according to claim 1, wherein
On-board heating cooker. 6. A detection signal is detected by detecting an open / closed state of a door.
A power supply circuit for supplying control power to the control means; a power supply circuit provided between the commercial AC power supply and the power supply circuit;
A door switch that is turned on and off in response to opening and closing, and a power supply unit is provided in parallel with the door switch,
Switching means on / off controlled by control means
6. The method according to claim 1 , wherein:
The heating cooker according to any one of the above.