JPH11111429A - Heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress wasteful electric power consumption and inhibit a heater from unintentional operation by installing a control means which switches an electric power switching means to an electricity non-supply state while responding after a prescribed period from the time when the heater is switched to non-operation state by a heater switching means. SOLUTION: When an electric power source button 4 is pushed continuously for 2 seconds, a power circuit 7b is turned on and an electric power source lamp 40 is lighted. In the case an operational knob 5 is already at an adjustment position, a buzzer 8 is operated for 1 second to inform erroneous operation and the electric power circuit 7b is turned off. In the case the operational knob 5 is at a turn-off position, a timer starts counting time and when the knob 5 is still at the turning off position even after five minutes, the power circuit 7b is turned off. On the other hand, in the case the operational knob 5 is operated at the adjustment position within five minutes, current is passed to the heater 3. After one hour passes while the adjustment position 5 being not turned back to the turning-off position, the heater 3 is turned off and the buzzer 8 is rung. In the case the heater 3 is turned off during operation by the operational knob 5, the electric power circuit 7b is turned off after five minutes to prevent wasteful consumption of power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device, and more particularly to a heating device having a heater as heating means.

[0002]

FIG. 13 is a front view of a conventional electric stove (9). The electric stove (9) in the figure has a heater (9a),
A push-type power button (9b) for switching whether to supply electricity to the heater (9a), and a rotary operation knob (9c) for switching whether to operate the heater (9a). , Is provided. The operation knob (9c) is an electric stove.
It is easy to operate by protruding from the front of (9).

In this electric stove (9), a power button (9b) is pressed to supply electricity (the power circuit for the heater is turned on).
With the operation knob (9c) turned to the heater (9a)
The heater (9a) is configured to be operated when the operation side is rotated to the operation side. Therefore, two operations are necessary to operate the heater (9a), and if the infant turns the operation knob (9c) or the power button (9b) is pressed by an object, The heater (9a) does not work.

When the operation knob (9) is operated while the heater (9a) is operating,
When c) is rotated to the non-operation side of the heater (9a), the heater
(9a) is deactivated. When the power button (9b) is pressed, the power is not supplied (the power circuit for the heater is turned off).
Becomes

[0005]

However, the heater (9a)
When the operation knob (9c) is operated in the operation state of, the heater (9a)
However, even if the power supply circuit is not operated, the power supply button (9b) may not be turned off and the power supply circuit for the heater may be left in an on state. In this case, since the power supply circuit and the like are maintained in the energized state, electricity is easily wasted.

In this case, since the power is turned on, the operation knob (9c) is only operated to the operating side, and the heater is turned on.
(9a) is activated. That is, there is a high possibility that the heater (9a) is inadvertently activated. In order to solve this inconvenience, it is conceivable that the power supply circuit is turned off at the same time when the operation knob (9c) is operated to the non-operation side of the heater (9a).

However, when cooking with the electric stove (9), there is a case where the heater (9a) is deactivated and immediately restarted. In this case, the power supply circuit is also turned off each time the operation knob (9c) is operated to the non-operation side, and therefore, at the time of the reactivation, the power button (9b) is turned on before the operation knob (9c) is turned on. Have to operate. Therefore, the operation for cooking was troublesome.

An object of the present invention is to provide a heating apparatus which suppresses waste of power consumption and inadvertent operation of a heater and improves usability. It is an object of the present invention to provide a heating device that suppresses waste of power consumption and inadvertent operation of a heater when there are a plurality of heaters, and improves usability.

[0009]

Means for solving the problems of the present invention are as follows: a heater, power supply switching means for switching whether or not to supply electricity to the heater, and whether or not to operate the heater. Heater switching means for switching, and in response to a lapse of a predetermined time from the time when the heater is switched to the non-operation state by the heater switching means during operation of the heater, the power supply switching means switches the power supply non-supply state to the non-power supply state. And control means for switching to

In this apparatus, when the power supply switching means is switched to the state of supplying electricity and the heater switching means is switched to the operation side of the heater, the heater is activated. When the heater is switched to the non-operating state by the heater switching unit during the operation of the heater, the power switching unit is switched to the non-supply state by the control unit when a predetermined time has elapsed from that point.

[0011] The means for solving the problems of the invention according to claim 2 includes "a plurality of heaters, power supply switching means for switching whether or not to supply electricity to all of the heaters, and each of the heaters corresponding to the heaters. A plurality of heater switching means for switching whether or not each of the heaters is operated, and a heater which has been operated to the end of the heaters is switched to a non-operation state by the heater switching means during at least one operation of the heaters. Control means for switching the power supply switching means to the non-supply state of the electricity in response to a lapse of a predetermined time from a point in time. "

In this device, when the power supply switching means is switched to the state of supplying electricity and at least one of the heater switching means is switched to the operation side of the heater, the corresponding heater is activated. When at least one of the heaters, which has been operated to the end of the heaters, is switched to a non-operating state during the operation of at least one of the heaters, when a predetermined time has elapsed from that time, the control unit switches the power supply switching unit to The state is switched to the non-supply state of electricity.

[0013]

As described above, according to the first aspect of the present invention, when a predetermined time elapses from the time when the heater is switched to the non-operation state by the heater switching means during the operation of the heater, the supply of electricity is stopped. Since it is switched to the state, it is not left in the state of supply of electricity for the predetermined time or more. Therefore, waste of power consumption in the heater power supply circuit and the like can be suppressed.

Further, since the battery is not left in the state of supply of electricity for the predetermined time or more, after the predetermined time has elapsed,
In order to operate the heater, two types of switching, ie, switching by the power supply switching unit and switching by the heater switching unit, are required, and there is no inconvenience that the heater is inadvertently activated. Furthermore, since the predetermined time is required from the time when the heater is switched to the non-operation state during the operation of the heater to the time when the heater is switched to the non-supply state, if the time is shorter than the predetermined time, the heater is temporarily stopped. Even if it is only inactive, the power supply is maintained. Therefore, when the heater is deactivated and immediately reactivated, there is no need to switch to the state of supplying electricity, and the usability of the heating device is improved.

According to the second aspect of the present invention, the same effects as those of the first aspect of the invention can be obtained. In addition, the heater is switched to the non-supply state when a predetermined time has elapsed from the point in time at which the last heater among the plurality of heaters was switched to the non-operation state. In this case, there is no inconvenience that the other heaters become inactive when the predetermined time elapses after only one heater becomes inactive.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. [Embodiment 1] FIG. 1 is a plan view of a drop-in stove (1) in an embodiment of the present invention, FIG. 2 is a front view of the drop-in stove (1), and FIG. FIG. 2 is a block diagram showing a main part of a drop-in stove (1).

* Regarding drop-in stove (1) * As shown in FIGS. 1 and 2, drop-in stove (1)
Has a configuration in which a heater (3) and gas burners (2a) (2b) are housed in a substantially rectangular box-shaped case body (10) so as to be exposed from the upper surface thereof. Further, a gas burner (2c) is housed in a grill portion (12) that is opened and closed on the front surface of the case body (10). Each of the heater (3) and the gas burners (2a) (2b) (2c) has a known structure.

* Regarding the operation panels (11a) and (11b) * Then, on the front surface of the case body (10), as shown in FIG.
An operation panel (11a) on the left side of the grill section (12) and a right operation panel (11b) on the front side are provided. The operation panel (11a) has a power button (4), an operation knob (5) for the heater (3), an operation knob (6a) for the gas burner (2a),
An operation knob (6b) for the gas burner (2b) and an operation knob (6c) for the gas burner (2c) are provided on the operation panel (11b).
c) is provided. These operation knobs (5) (6a) (6
b) and (6c) project from the operation panels (11a) and (11b),
Easy to operate.

* Regarding the power button (4) * The power button (4) is a push type, and the power button (4)
The contact portion (not shown) is closed by pressing, a signal to the effect that the signal is pressed is given to the control circuit (7a), and the power supply circuit (7b) is turned on / off by a control program described later. Has become. That is, the contact portion and the control program function as a switch for turning on / off the power supply circuit (7b).

Further, a power lamp (40) is provided on the pressing operation portion of the power button (4), as shown in FIG. This power lamp (40) is for displaying the on / off state of the power circuit (7b). * About the operation knob (5) * The operation knob (5) is a rotary type. When the operation knob (5) is turned, its contact part (not shown) is closed and the turning position is controlled by a signal. The power supply circuit (7c) is turned on / off by a control program described later, which is provided to (7a). That is, the contact portion and the control program function as a switch for turning on / off the energizing circuit (7c).

Specifically, as shown in FIG. 2, the operation knob (5) has a projection (51) projecting from the outer peripheral surface thereof. When the projection (51) is located at the uppermost position of the operation knob (5), the heater (3) is turned off, and the operation knob (5) is turned off.
When (5) is rotated counterclockwise, the heater (3) is turned on. Further, the amount of heating by the heater (3) is set based on the rotation position. Hereinafter, the convex part (5
The position of the operation knob (5) when 1) is located at the uppermost position is referred to as an "off position", and the position of the operation knob (5) when rotated is referred to as an "adjustment position".

* Regarding the operation knobs (6a), (6b), and (6c) * The operation knob (6a) is a rotary type, and its outer shape is set to the same shape as the operation knob (5). When the projection (61) projecting from the outer peripheral surface of the operation knob (6a) is located at the uppermost position of the operation knob (6a), the gas burner (2a)
Is turned off, and the gas burner (2a) is ignited when the operation knob (6a) is most rotated counterclockwise. After the ignition, the heating power of the gas burner (2a) is set based on the position of the projection (61).

The operation knobs (6b) and (6c) correspond to the operation knobs (6
It has the same configuration as a). * About control circuit (7a), power supply circuit (7b) and energizing circuit (7c) * This drop-in stove (1) has, as shown in FIG.
A control circuit (7a), a power supply circuit (7b) and an energizing circuit (7c) are provided. The power supply circuit (7b) is provided for the heater (3). The energizing circuit (7c) switches whether or not to energize the heater (3) with electricity supplied from the power supply circuit (7b). That is, the heater (3) is energized when the energizing circuit (7c) is on, and is not energized when the energizing circuit (7c) is off.

The control circuit (7a) includes the power button (4)
The power supply circuit (7b) and the power supply circuit (7c) are controlled based on the operation of the operation knob (5), and the heater (3) is controlled by these controls. The control lamp (7a) also controls the power lamp (40) and the buzzer (8).
The control circuit (7a) incorporates a microcomputer, and the control is executed by a control program stored in the microcomputer.

[Control of Heater (3)] FIG. 4 is a flowchart showing a part of a control program for controlling the heater (3), and FIG. 5 is a flowchart showing another part of the control program. FIG. 6 is a flowchart showing still another part of the control program. The control of the heater (3) will be described based on the control program shown in FIG.

In this apparatus, when the power button (4) is continuously pressed for two seconds, the power circuit (7b) is turned on and the power lamp (40) is turned on (steps (S1), (S2), (S3)). )). At this time, if the operation knob (5) has already been turned to the "adjustment position", the buzzer (8) sounds "P" for one second to notify that the operation is incorrect, and the power supply circuit (7b ) Is turned off and the power lamp (40) is turned off (step (S4)
(S5) (S6) (S7)). Then, the process returns to step (S1).

If the operation knob (5) is at the "OFF position", the timer is reset to start time measurement (steps (S4) and (S8)). And operation knob even after 5 minutes
When (5) remains in the `` off position '', the power circuit (7b)
Is turned off and the power lamp (40) is turned off (steps (S9) (S10) (S20) (S21)). Then, the process returns to step (S1).

Power button until 5 minutes have passed
When (4) is pressed, the power supply circuit (7b) is turned off and the power supply lamp (40) is turned off (steps (S11), (S20), (S21)
). Then, the process returns to step (S1). On the other hand, if the operation knob (5) is turned from the "off position" to the "adjustment position" before the elapse of 5 minutes, the energizing circuit (7c) is turned on to energize the heater (3) (step (S9) (S10) (S12)).
Further, the timer is reset and a new time measurement is started (step (S13)).

Thereafter, when the operation knob (5) is returned from the "adjustment position" to the "off position", the energizing circuit (7c) is turned off and the heater (3) is turned off (steps (S14) and (S17)). )). Then, returning to step (S8), the timer is reset again and a new time measurement is started, and the operation knob (5) is operated from the "off position" to the "adjustment position" until 5 minutes have elapsed. Is determined (steps (S9) and (S10)).

When operated to the "adjustment position", the energizing circuit (7c) is turned on again to energize the heater (3) (steps (S9) and (S12)), and again the steps (S13) and (S14). At (S15), it is monitored whether or not the operation knob (5) is returned to the "cut position". If 5 minutes have elapsed without being operated in the "adjustment position", the power supply circuit (7b) is turned off and the power lamp (4
0) is turned off (steps (S9) (S10) (S20) (S21)), and the process returns to step (S1).

On the other hand, in the steps (S14) and (S15), if one hour has passed without the operation knob (5) being returned to the "OFF position", the energizing circuit (7c) is turned off and the heater (3) is turned off. Is turned off (steps (S15) and (S18)). Next, the buzzer sounds every second
(8) sounds "P" five times in total (step (S22) (S23)
(S24) (S25) (S26)). Thus, the user can know that one hour has passed since the start of the operation of the heater (3).

When the operation knob (5) is returned to the "OFF position" before the buzzer (8) has sounded five times, the buzzer is sounded.
The notification operation of (8) is stopped, and the process returns to step (S8) again. Then, the timer is reset and 5
It is monitored whether or not the operation knob (5) is operated to the "adjustment position" within minutes (steps (S26) (S27) (S8) (S9) (S1
0)).

If the power button (4) is pressed before the buzzer (8) has sounded five times, the power circuit (7b) is turned off and the power lamp (40) is turned off (step (S28)). (S2
0) (S21)). Then, the process returns to step (S1). Step (S
14) In (S15), if the operation knob (5) is not returned to the "OFF position" and the power button (4) is pressed until one hour has elapsed, the energizing circuit (7c) is turned off. Turn off the heater (3)
Is turned off (steps (S16) and (S19)). Subsequently, the power supply circuit (7b) is turned off and the power supply lamp (40) is turned off (steps (S20) and (S21)). Then, the process returns to step (S1).

In this apparatus, when the operation knob (5) is returned to the "cutting position" while the heater (3) is operating and the heater (3) is turned off (steps (S14) (S17)), the operation is started from that point. Knob
When 5 minutes have passed without (5) being turned on, the power supply circuit (7
b) is turned off (steps (S8) (S9) (S10) (S20)),
For more than 5 minutes, only the power supply circuit (7b) is not left in an ON state. Therefore, waste of power consumption in the power supply circuit (7b) and the like when the heater (3) is not used can be suppressed.

Further, since the power supply circuit (7b) is not left on for more than 5 minutes, after the lapse of 5 minutes, the power button (4) is turned on to activate the heater (3). Pressing and turning the control knob (5) are required.
Inadvertent operation of the heater (3) is prevented. Further, since it takes 5 minutes from the time when the heater (3) is turned off to the time when the power supply circuit (7b) is turned off, if the time is shorter than the above 5 minutes, the power supply circuit (7b) is turned on. Will be maintained.
Therefore, when the heater (3) is turned off during cooking and the heater (3) is immediately turned on, only the operation knob (5) needs to be operated, and the power supply circuit is turned off at the same time when the heater (3) is turned off.
The usability of this drop-in stove (1) is improved compared to the case where (7b) is also turned off.

In order for the power circuit (7b) to be turned on, the power button (4) must be pressed continuously for two seconds, so that even if an object comes into contact with the power button (4) momentarily, the power circuit (7b) is turned on. ) Does not turn on. Therefore, the disadvantage that the power supply circuit (7b) is inadvertently turned on is prevented. In this device, the power button (4), the power circuit (7b), and the steps (S1) (S
2) The "power supply switching means" according to claim 1, wherein (S11) and (S20) are already described.
Operation knob (5), energizing circuit (7c) and step
(S9), (S12), (S14) and (S17) correspond to the "heater switching means" according to the first aspect of the present invention. Further, steps (S14) (S17) (S8)
(S9), (S10) and (S20) correspond to the "control means" described in claim 1 described above. Second Embodiment FIG. 7 is a plan view of a table stove (1a) according to a second embodiment of the present invention, FIG. 8 is a front view of the table stove (1a), and FIG. It is a block diagram which shows the principal part of a table stove (1a).

* Table hob (1a) * As shown in FIGS. 7 and 8, the table hob (1a) has a pair of substantially rectangular box-shaped case bodies (10a) exposed from the upper surface thereof. This is a configuration in which heaters (3a) (3b) are housed.
It should be noted that a known configuration is employed for the heaters (3a) and (3b). The power button is located on the front of the case (10a).
(4) Operation knob (5a) for heater (3a) and heater (3b)
Operating knob (5b).

* Regarding the power button (4) * The power button (4) has the same configuration as in the first embodiment, and the contact portion of the power button (4) and a control program described later are connected to a power circuit (7b). Functions as a switch for turning on and off. Further, a power operation lamp (40) similar to that of the first embodiment is provided on a pressing operation portion of the power button (4).

* Regarding the operation knobs (5a) and (5b) * Each of the operation knobs (5a) and (5b) is of a rotary type, and the respective contact portions of these operation knobs (5a) and (5b) and the control described later The program functions as a switch for turning on / off the energizing circuits (7c) and (7d). These operation knobs (5a) and (5b) protrude from the front surface of the case body (10a) to facilitate operation. As shown in FIG. 8, these operation knobs (5a) and (5b) have marks (52) and (53) printed on a part of the outer peripheral portion.

When the mark (52) is located at the uppermost position of the operation knob (5a), the heater (3a) is turned off. When the operation knob (5a) is turned, the heater (3a) is turned off. Is turned on. Further, the amount of heating by the heater (3a) is set based on the rotation position. Also, mark (5
The heater (3b) is turned off when (3) is located at the uppermost position of the operation knob (5b), and the heater (3b) is turned on when the operation knob (5b) is turned. Have been. Further, the amount of heating by the heater (3b) is set based on the rotation position. Hereinafter, the positions of the operation knobs (5a) and (5b) when the marks (52) and (53) are located at the uppermost position are referred to as `` cut positions ''.
And the positions of the operation knobs (5a) and (5b) when turned are referred to as "adjustment positions".

* Regarding the control circuit (7a), the power supply circuit (7b) and the energizing circuits (7c) (7d) * The table stove (1a) has a control circuit (7a), a power supply circuit, as shown in FIG. (7b) and power supply circuits (7c) and (7d). The power supply circuit (7b) is provided for the heaters (3a) (3b). The power supply circuit (7c) is connected to the power supply circuit (7
b) to switch whether the electricity supplied from the heater (3a) is supplied to the heater (3a) or not.The power is supplied to the heater (3a) when the power supply circuit (7c) is on and the heater is supplied when the power supply circuit (7c) is off. (3
It is configured not to energize in a). Also, energizing circuit (7d)
Is for switching whether or not to supply electricity supplied from the power supply circuit (7b) to the heater (3b) .When the electricity supply circuit (7d) is turned on, the heater (3b) is supplied with electricity. In addition, the heater (3b) is not energized when it is off.

The control circuit (7a) includes the power button (4)
And the power supply circuit (7b) based on the operation of the operation knobs (5a) and (5b).
And the energizing circuits (7c) and (7d), and the heaters (3a) and (3b) are controlled by these controls. The control circuit (7a) controls the power lamp (40) and the buzzer (8).
(Not shown) are also controlled. The control circuit (7a) incorporates a microcomputer, and the control is executed by a control program stored in the microcomputer.

[Use of Heater (3)] FIG.
FIG. 11 is a flowchart showing a part of a control program for controlling the heaters (3a) and (3b), FIG. 11 is a flowchart showing another part of the control program, and FIG. It is a flowchart which shows a routine.

In this device, when the power button (4) is pressed for two seconds, the power circuit (7b) is turned on and the power lamp is turned on.
(40) lights up (steps (S31), (S32), and (S33)). At this time, if both of the operation knobs (5a) and (5b) are not at the `` off position '', that is, if at least one of the operation knobs (5a) and (5b) has already been turned to the `` adjustment position '', ,buzzer
(8) sounds a beep for one second to indicate that the operation is incorrect, turns off the power supply circuit (7b) and turns on the power supply lamp (40).
Is turned off (steps (S34) (S35) (S36) (S37)). Then, the process returns to step (S31).

In step (S34), the operation knob (5a)
If both (5b) are in the “off position”, the flag (A) corresponding to the on / off state of the heater (3a) is set to “0” and the on / off state of the heater (3b) is set. Corresponding flag (B)
Is set to "0" (steps (S34) and (S38)). Flag (A)
Is "0" when the heater (3a) is off, the heater (3a)
Is "1" when is turned on, and "2" when the heater (3a) is turned off from on. Similarly, the flag (B) is used for the heater (3b)
Is "0" when the heater remains off, "1" when the heater (3b) is on, and "2" when the heater (3b) is off from on.
Becomes

Also, after at least one of the heaters (3a) and (3b) is turned on, a flag (F) indicating whether or not time measurement has been performed since the time when both of the heaters (3a) and (3b) were turned off is set to ""0" (step (S38)). This flag (F) is "1" when the time measurement is performed, and is "0" when the time measurement is not performed. Subsequently, in step (S39), the timer is reset to start time measurement, and the heater control routine (steps (S40), (S41), (S42)) is executed.

In this heater control routine, the flag (A)
Is not "1", that is, when the flag (A) is "0" or "2", it is determined whether or not the operation knob (5a) has been operated from the "off position" to the "adjustment position". When operated, the energizing circuit (7c) is turned on and the heater (3a) is turned on (steps (S61), (S62), (S63)). Further, the flag (A) is set to "1" (step (S64)). When the operation is not performed, the energizing circuit (7c) is kept off (step (S
62)).

When the flag (A) is "1",
It is determined whether or not the operation knob (5a) has been operated from the "adjustment position" to the "off position". When the operation knob has been operated, the energizing circuit (7c) is turned off and the heater (3a) is turned off (step
(S69) (S70) (S71)). Further, the flag (A) is set to "0" (step (S72)). When the operation is not performed, the energizing circuit (7c) is kept on (step (S70)).

When the flag (B) is not "1", that is, when the flag (B) is "0" or "2", the operation knob
It is determined whether or not (5b) has been operated from the "off position" to the "adjustment position". If the operation has been performed, the energizing circuit (7d) is turned on and the heater (3b) is turned on (step (S65) (S66)
(S67)). Also, the flag (B) is set to "1" (step (S
68)). When the operation is not performed, the power supply circuit (7d) is kept off (step (S66)).

When the flag (B) is "1",
It is determined whether or not the operation knob (5b) has been operated from the "adjustment position" to the "off position". When the operation knob has been operated, the energizing circuit (7d) is turned off and the heater (3b) is turned off (step
(S73) (S74) (S75)). Further, the flag (B) is set to "0" (step (S76)). When the operation is not performed, the power supply circuit (7d) is kept on (step (S74)).

Even if 5 minutes have passed since the start of the time measurement,
When both the heaters (3a) and (3b) remain off in this heater control routine, the power supply circuit (7b) is turned off and the power supply lamp (40) is turned off (steps (S40), (S41), and (S42)). (S5
1) (S52)). Then, the process returns to step (S31). If the power button (4) is pressed within 5 minutes, the power circuit (7b) is turned off and the power lamp (40) is turned off (steps (S40), (S41), (S42), and (S43)). (S51) (S52)). Then, the process returns to step (S31).

On the other hand, when at least one of the heaters (3a) and (3b) is turned on within the above-mentioned 5 minutes, the step (S44)
Proceeding to (S45), the heater control routine is repeatedly executed (steps (S40), (S41), (S44), (S45)). At this time, when the power button (4) is pressed, the power supply circuit (7c) (7
d) is turned off, the power circuit (7b) is turned off, and the power lamp (40) is turned off (steps (S46) and (S50)).
(S51) (S52)). Then, the process returns to step (S31).

Thereafter, when both of the heaters (3a) and (3b) are turned off, the timer is reset, a new time measurement is started, and the flag (F) is set to "1" (step (S47)).
(S48) (S49)). Then, it is monitored whether at least one of the heaters (3a) and (3b) is turned on within 5 minutes (steps (S40) (S41) (S44) (S47) (S42)). If at least one of the heaters (3a) and (3b) is turned on within the above-mentioned 5 minutes, the process proceeds from step (S44) to step (S45) and proceeds to step (S45).
(F) becomes "0", and the heater control routine is repeatedly executed (steps (S40), (S41), (S44), (S45)).

If at least one of the heaters (3a) and (3b) does not turn on within the above five minutes, the power supply circuit (7b) is turned off and the power supply lamp (40) is turned off (step (S42)).
(S51) (S52)), and return to step (S31). When the power button (4) is pressed within 5 minutes, the power circuit (7b) is turned off and the power
0) is turned off (steps (S43), (S51), (S52)) and the step (S
Return to 31).

In this apparatus, the operation knob is turned off while at least one of the heaters (3a) and (3b) is operating, and the heater (3a) is turned off.
When both (3b) are turned off (steps (S44) (S47) (S
48) (S49)), since the power supply circuit (7b) is turned off when five minutes have elapsed without turning on both of the operation knobs (5a) and (5b) from that point (steps (S44) and (S47)). (S42) (S51)), the power supply circuit (7b) alone is not left in the ON state for more than 5 minutes. Therefore, waste of power consumption in the power supply circuit (7b) and the like when both of the heaters (3a) and (3b) are not used can be suppressed.

Further, since the power supply circuit (7b) is not left in the ON state for more than 5 minutes, after the lapse of 5 minutes, at least one of the heaters (3a) and (3b) is operated. An operation of pressing the power button (4) and an operation of turning the operation knob are required, so that careless operation of the heaters (3a) and (3b) is prevented. Furthermore, since it takes 5 minutes from the time when both the heaters (3a) and (3b) are turned off to the time when the power supply circuit (7b) is turned off, if the time is shorter than 5 minutes, the power supply circuit (7b ) Is kept on. Therefore, during the cooking, both the heaters (3a) and (3b) are turned off and the heater (3
a) When turning on at least one of (3b), it is only necessary to operate the corresponding operation knob, and both the heaters (3a) and (3b) are turned off and the power supply circuit (7b) is turned off at the same time. In comparison, the usability of this drop-in stove (1) has been improved.

In this case, a power button (4), a power circuit
(7b) and the steps (S31) (S32) (S43) (S51) are described in claim 2.
Operation knobs (5a) (5
b), energizing circuits (7c) (7d) and steps (S62) (S63) (S66) (S6
7) (S70), (S71), (S74) and (S75) correspond to the "heater switching means" according to the second aspect of the present invention. Further, steps (S40) (S41) (S
44), (S47), (S48), (S49), (S42) and (S51) correspond to the "control means" described in claim 2 described above. [Other embodiments]. In the above-described second embodiment, the present invention is applied to an apparatus provided with a pair of heaters (3a) and (3b). However, this may be applied to an apparatus provided with three or more heaters.

[0058] In the first and second embodiments, the switch function unit for turning on / off the power supply circuit (7b) is configured by a contact portion of the power button (4) and a part of the control program,
The switch function unit for turning on / off the energizing circuit is configured by a contact portion of an operation knob and another part of the control program.However, each of the switch function units is mechanically controlled without including the control program. It may be composed only of things.

In this case, a known so-called push-push type switch can be employed. To explain this, an operating unit movable between a non-pressing position and a pressing position and biased by a spring toward the non-pressing position, and an open and non-pressing position when the operating unit is in the non-pressing position. A lock mechanism comprising a contact portion which is closed when it is at an intermediate position from the pressing position, a heart cam groove for locking the operating portion at the intermediate position, and a pin-shaped engaging element which engages with the heart cam groove; An auto-off switch may be configured to include a forcible release mechanism that removes the engaging element from the heart cam groove by electromagnetic force or the like in response to an off signal output from the control circuit at the elapse of time.

In this case, when the operating portion at the non-pressing position is pressed to the pressing position and moved to the pressing position, and then the hand is released from the operating portion, the operating portion is pushed back to the non-pressing position by the spring, and the heart cam groove is formed. Is locked at the intermediate position by the engagement of the intermediate point with the engaging element. At this time, the contact portion is closed, and the power supply circuit (7b) or the power supply circuit is turned on. When the operating portion is pressed again in this locked state, the engaging element is disengaged from the intermediate point, and the operating portion is pushed back to the pressed position by the urging force. At this time, the contact portion is opened, and the power supply circuit (7b) or the power supply circuit is turned off.

Also, even when the off signal is output from the control circuit in the locked state, the forcible release mechanism allows
The engaging element is disengaged from the intermediate point, and the operating section is pushed back to the non-pressed position by the spring. At this time, the contact portion is opened, and the power supply circuit (7b) or the power supply circuit is turned off.

[Brief description of the drawings]

FIG. 1 is a plan view of a drop-in stove (1) according to an embodiment of the present invention.

[Fig. 2] Front view of drop-in stove (1)

FIG. 3 is a block diagram showing a main part of the drop-in stove (1).

FIG. 4 is a flowchart showing a part of a control program for controlling the heater (3).

FIG. 5 is a flowchart showing another part of the control program.

FIG. 6 is a flowchart showing still another part of the control program.

FIG. 7 is a plan view of a table stove (1a) according to a second embodiment of the present invention.

FIG. 8 is a front view of a table stove (1a).

FIG. 9 is a block diagram showing a main part of the table stove (1a).

FIG. 10 is a flowchart showing a part of a control program for controlling the heaters (3a) and (3b).

FIG. 11 is a flowchart showing another part of the control program.

FIG. 12 is a flowchart showing a heater control routine in the control program.

FIG. 13 is a front view of a conventional electric stove (9).

[Explanation of symbols]

 (1) ・ ・ ・ Drop-in stove (1a) ・ ・ ・ Table stove (4) ・ ・ ・ Power button (5) ・ ・ ・ Operation knob (5a) ・ ・ ・ Operation knob (5b) ・ ・ ・ Operation knob ( 7a) ・ ・ ・ Control circuit (7b) ・ ・ ・ Power supply circuit (7c) ・ ・ ・ Electrification circuit (7d) ・ ・ ・ Electrification circuit

Claims (2)

[Claims] A heater switching means for switching whether or not to supply electricity to the heater; a heater switching means for switching whether to operate the heater; and a heater switching means during operation of the heater. And a control means for switching the power supply switching means to the non-supply state of the electricity in response to a lapse of a predetermined time from the time when the heater is switched to the non-operation state. 2. A plurality of heaters, power supply switching means for switching whether or not to supply electricity to all of the heaters, and a plurality of switching means respectively corresponding to the heaters and switching whether or not to operate each of the heaters Responding to the fact that a predetermined time has elapsed from the point in time when at least one of the heaters has been operated, the heater switching means has switched to a non-operating state by the heater switching means. A control unit for switching the power supply switching unit to the non-supply state of the electricity.