JPH11111428A - Heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit a heater from unintentional operation by installing a control means which switches an electric power switching means to an electricity non-supply state responding to the non-operational state of a heater for a prescribed period from the time when the electric power switching means is switched to an electricity supply state. SOLUTION: When an electric power source button 4 is pushed continuously for 2 seconds, an electric 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 rings 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 switching position, a timer starts counting time and when the knob 5 is turned to the adjustment position within 10 second, current is passed to the heater 3 a current carrying lamp 50 is turned on and a pan is heated. In the case the operational knob 50 is at an off-position even after 10 seconds, the electric power circuit 7b is turned off. In order to turn on the heater 3, two-step operation, that is the operation of the electric power button and operation of the operational knob 5 consecutively within 10 second, is necessary and consequently, a trouble that the heater 3 is unintentionally operated only by one step operation can reliably be avoided.

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]

2. Description of the Related Art FIG. 14 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).

The electric stove (9) is operated in a state in which the power button (9b) is pressed to switch to an electric power supply state, and the operation knob (9c) is further turned to the operation side of the heater (9a). Then, the heater (9a) is activated. Therefore, two operations are required to activate the heater (9a), and only the infant turns the operation knob (9c) or the power button (9b) is pressed by an object. Then, the heater (9a) does not enter the operating state.

[0004]

However, the power button
After pressing (9b) to switch to the power supply state, the operation knob (9c) may not be operated to the operation side of the heater (9a) and may be left as it is. In this case, since the power button (9b) has already been switched to the power supply state, simply operating the operation knob (9c) to the operation side activates the heater (9a).

[0005] That is, if the operation knob (9c) is left as described above, the operation knob (9c) is turned by an infant, and the heater (9a) is activated. An object of the present invention is to provide a heating device in which careless operation of a heater is reliably suppressed. It is an object of the present invention to provide a heating device in which careless operation of a heater is reliably suppressed when there are a plurality of heaters.

On the other hand, when the power button (9b) is switched to the power supply state, the operation knob (9c) is already turned on by the heater (9a).
May have been switched to the operation side. Also in this case, the heater (9a) is activated only by pressing the power button (9b), that is, by only one operation. A third object of the present invention is to provide a heating device in which careless operation of the heater is reliably suppressed.

A fourth object of the present invention is to provide a heating device in which careless operation of the heater is reliably suppressed when there are a plurality of heaters.

[0008]

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 the power supply switching means in response to a non-operational state of the heater within a predetermined time after the power supply switching means is switched to the power supply state. And control means for switching to

In this case, when the heater switching means is switched to the operation side of the heater after the power supply switching means is switched to the state of supplying electricity, the heater is activated.
Then, when a predetermined time elapses while the heater is in the inactive state from the point in time when the power supply switching unit is switched to the state of supplying electricity, the control unit switches the power supply switching unit to the state of non-supply of electricity.

[0010] 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 to supply electricity to all of the heaters, and each of the heaters corresponding to the heaters. A plurality of heater switching means for respectively switching whether or not to operate, and in response to all the non-operational states of the heater within a predetermined time from the time when the power supply switching means is switched to the power supply state. Control means for switching the power supply switching means to the non-supplying state of the electricity. "

In this apparatus, when the heater switching means is switched to the operation side of the heater after the power supply switching means is switched to the power supply state, the corresponding heater is activated. Then, when a predetermined time elapses while all the heaters are in a non-operating state from the point in time when the power supply switching unit is switched to the state of supplying electricity, the control unit switches the power supply switching unit to a state of non-supply of electricity.

[0013] The means for solving the problems of the invention according to claim 3 include "a heater, power supply switching means for switching whether or not to supply electricity to the heater, and heater switching means for switching whether to operate the heater, In response to the fact that the heater switching means has already been switched to the operation state of the heater when the power supply switching means is switched to the power supply state, the power supply switching means is switched to the non-power supply state. And control means for switching.

In this case, if the heater switching means is switched to the operation side of the heater after the power supply switching means is switched to the state of supplying electricity, the heater is activated.
If the heater switching unit has already been switched to the operation state of the heater when the power switching unit is switched to the state of supplying electricity, the control unit switches the power switching unit to the non-supply state of electricity.

The means for solving the problem of the invention according to claim 4 includes "a plurality of heaters, power supply switching means for switching whether to supply electricity to all of the heaters, and each of the heaters corresponding to the heaters. And a plurality of heater switching means for respectively switching whether or not to operate, and at least one of the heater switching means has already been switched to the operation state of the heater when the power supply switching means is switched to the power supply state. Control means for switching the power supply switching means to the non-supplying state of the electricity in response to the request. "

In this case, when the heater switching means is switched to the operation side of the heater after the power supply switching means is switched to the power supply state, the corresponding heater is activated. When at least one of the heater switching units has already been switched to the operation state of the heater when the power supply switching unit is switched to the power supply state, the control unit switches the power supply switching unit to the non-power supply state. Can be switched.

In the above-mentioned inventions of claims 1 to 4, as in the invention of claim 5, "the apparatus further comprises a case body for accommodating the heater, and the power supply switching means protrudes from the case body. With a press-type power button provided as
The heater switching means has a rotary operation knob for the heater provided so as to protrude from the case body. "

[0017]

As described above, according to the first aspect of the present invention, when a predetermined time elapses while the heater is in the inactive state from the time when the power supply switching means is switched to the power supply state, the power supply switching means is turned off. Is switched to the non-supply state, so that the apparatus is not left in the electricity supply state for the predetermined time or more.

Therefore, in order for the heater to be in the operating state, it is necessary to perform two switching operations, namely, switching by the power supply switching unit and switching by the heater switching unit within the predetermined time, so that careless operation of the heater is ensured. Is prevented. According to the second aspect of the invention, the same effect as that of the first aspect of the invention is obtained. In addition, in order for the power supply switching means to switch to the non-supply state of electricity after the predetermined time has elapsed, it is necessary that all of the heaters be in the non-operation state within the predetermined time. Inconvenience such that the heater in the operating state is not operated is prevented.

According to the third aspect of the present invention, if the heater switching means has already been switched to the operation state of the heater when the power supply switching means is switched to the power supply state, the power supply switching means is switched to the non-power supply state. Is switched to. Therefore, in order to bring the heater into the operating state, it is necessary to perform two switching operations in which the power supply switching unit is switched to the power supply state and then the heater switching unit is switched to the heater operating state. Is prevented.

According to the fourth aspect of the invention, the same effects as those of the third aspect of the invention can be obtained. In addition, in order for the control means to force the power switching means to switch to the non-supply state of electricity at the time when the power switching means is switched to the state of supplying electricity, at least one of the heater switching means at the time is required It is sufficient that the operation state is switched to the operation state, so that careless operation of the heater when there are a plurality of heaters is reliably prevented.

According to the fifth aspect of the present invention, the push-type power button and the rotary operation knob are provided so as to protrude from the case body, and the power button and the operation knob come into contact with an object. Inadvertent operation of the heater is prevented by the control of the first to fourth aspects of the present invention.

[0022]

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. 4 is an enlarged view of the operation panel (11a) of FIG. 2, FIG. 4 is a plan view of the operation knobs (5) and (6a) of FIG. 3, and FIG. FIG.

* Drop-in cooker (1) * Figure 1
As shown in FIG. 2, the drop-in stove (1) houses a heater (3) and gas burners (2a) (2b) so as to be exposed from the upper surface of a substantially rectangular box-shaped case body (10). This is the configuration. 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).
In addition, each of the heater (3) and the gas burners (2a) (2b) (2c)
A known configuration is employed.

* Regarding the operation panels (11a) and (11b) * Then, as shown in FIG. 2, on the front surface of the case body (10), the operation panel (11a) on the left side of the grill portion (12) when viewed from the front. And a right operation panel (11b). Operation panel (1
1a) is provided with a power button (4), an operation knob (5) for the heater (3), and an operation knob (6a) for the gas burner (2a), and an operation panel (11b) Operation knob (6b) for gas burner (2b) and operation knob (6c) for gas burner (2c)
And are provided. These operation knobs (5) (6a) (6b)
(6c) protrudes forward from the operation panels (11a) and (11b) to facilitate operation. In addition, these operation knobs (5)
(6a), (6b) and (6c) are set to the same shape and the same size.

* 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, as shown in FIG. 3, a power lamp (40) is provided on the pressing operation portion of the power button (4). The power lamp (40) is for displaying an on / off state of a power circuit (7b) described later. * 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 FIGS. 3 and 4, 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. When the operation knob (5) is rotated counterclockwise, the heater (3) is turned off. Is turned on. Further, the amount of heating by the heater (3) is set based on the rotation position. The heater (3) may be turned on when the operation knob (5) is turned clockwise.

Hereinafter, the position of the operation knob (5) when the convex portion (51) is located at the uppermost position is referred to as a "cut position", and the position of the operation knob (5) when rotated is referred to as "off position". Adjustment position ''
Called. A ring-shaped energizing lamp (50) surrounding the operation knob (5) is mounted on the operation panel (11a). The energizing lamp (50) is turned on when the heater (3) is on, and turned off when the heater (3) is off.

* Regarding the operation knob (6a) * 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 circuit is closed and the gas burner (2a) is extinguished. Knob (6
When a) is rotated counterclockwise, the gas circuit is opened and the gas burner (2a) is ignited. Then, after the ignition, the gas burner (2a) based on the position of the projection (61)
Is set.

A ring-shaped ignition lamp (60a) surrounding the operation knob (6a) is mounted on the operation panel (11a). The ignition lamp (60a) is turned on when the gas burner (2a) is ignited, and is turned off when the heater (3) is extinguished. * Regarding the operation knobs (6b) and (6c) * Furthermore, the operation knobs (6b) and (6c) have the same configuration as the operation knob (6a). Also, ring-shaped ignition lamps (60b) (60c) surrounding these operation knobs (6b) (6c) are mounted on the operation panel (11b).

* Regarding the control circuit (7a), the power supply circuit (7b) and the energizing circuit (7c) * 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. Also, this control circuit (7a)
Power lamp (40), power lamp (50) and buzzer
(8) is also controlled. The control circuit (7a) incorporates a microcomputer, and the control is executed by a control program stored in the microcomputer.

[Regarding Control of Heater (3)] FIG. 6 is a flowchart showing a part of a control program for controlling the heater (3), and FIG. 7 is a flowchart showing another part of the control program. is there. The control of the heater (3) will be described based on the control program shown in FIG. In this device, 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), and (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 inform that the operation is incorrect, and
The power supply circuit (7b) is turned off and the power supply lamp (40) is turned off (steps (S4), (S5), (S6), and (S7)). And step (S1)
Return to When the operation knob (5) is in the "OFF position",
Reset timer and start time measurement (step
(S4) (S8)).

When the operation knob (5) is turned from the "off position" to the "adjustment position" until 10 seconds elapse, the energizing circuit (7c) is turned on to energize the heater (3). And turn on the energizing lamp (50) (step (S9) (S
10) (S13) (S14)). Thus, the pot and the like placed on the heater (3) are heated. The fact that the heater (3) is turned on can be recognized by the lighting of the energizing lamp (50).

On the other hand, if the operation knob (5) remains at the "off position" even after 10 seconds, the power supply circuit (7b) is turned off and the power supply lamp (40) is turned off (step (S9)).
(S10) (S11) (S12)). Then, the process returns to step (S1). After this, turn on the operation knob (5) after the heater (3) is turned on.
When the power is returned from the “adjustment position” to the “off position”, the power button (4) is pressed, or two hours have passed, the energizing circuit (7
c) is turned off, the heater (3) is turned off, and the energizing lamp (50) is turned off (Steps (S15) (S16) (S17) (S18) (S
19) (S20)). Further, the power supply circuit (7b) is turned off and the power supply lamp (40) is turned off, and the process returns to step (S1).

In this apparatus, if the heater (3) is kept off for 10 seconds after the power button (4) is pressed to turn on the power circuit (7b), the steps (S9), (S10) and (S11) are performed. ), The power supply circuit (7b) is turned off, so that the power supply circuit (7b) is not left in an on state for 10 seconds or more. Therefore, in order to turn on the heater (3), it is necessary to operate the power button (4) and
Two operations of the operation knob (5) are required within the above-mentioned 10 seconds, and the inconvenience of unintentionally operating the heater (3) by one operation is reliably prevented.

When the power button (4) is pressed, the power circuit (7) is pressed.
If the operation knob (5) is already in the "adjustment position" at the point when b) is turned on, the power supply circuit (7b) is turned off by steps (S4), (S5) and (S6). Therefore, in order to turn on the heater (3), the operation knob (5) must always be operated to the "adjustment position" after the operation of the power button (4). This reliably prevents the inadvertent operation of the heater (3) in one operation.

A push-type power button (4) and a rotary operation knob (5) protrude forward from the operation panel (11a), and the power button (4) and the operation knob (5) make contact with an object. Therefore, the effect of preventing the careless operation of the heater (3) is particularly remarkable. Also, since the operation knob (5) for the heater (3) is set to the same shape and the same size as the operation knobs (6a) (6b) (6c) for the gas burners (2a) (2b) (2c), In addition to ensuring the effect of preventing the careless operation described above, the unified appearance of the drop-in hob (1) increases, and the design of the drop-in hob (1) is excellent.

Further, the operation knob (5) is provided on the operation panel (11).
a), the operation knob (5) is more convenient to use than the operation panel (11a). In order for the power circuit (7b) to turn on, the power button (4) must be pressed continuously for 2 seconds, so even if an object comes into contact with the power button (4) momentarily, the power circuit (7b) Does not turn on. Therefore, also in this respect, careless operation of the heater (3) is prevented.

The power button (4), the power circuit (7b) and the steps (S1) and (S2) correspond to the "power switching means" described in claims 1 and 3, and the operation knob (5) The energizing circuit (7c) and the steps (S9) and (S13) correspond to the "heater switching means" described in claims 1 and 3 described above. Further, steps (S9) (S10) (S1
1) corresponds to the “control means” according to claim 1 described above, and steps (S4), (S5) and (S6) correspond to “control means” according to claim 3 described above.
Is equivalent to Second Embodiment FIG. 8 is a plan view of a table stove (1a) according to a second embodiment of the present invention, FIG. 9 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 Stove (1a) * As shown in FIGS. 8 and 9, the table stove has a pair of heaters (3a) so as to be exposed from the upper surface of a substantially rectangular box-shaped case body (10a). ) (3b). still,
Known configurations are employed as 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 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. Further, as shown in FIG. 9, 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 positions are referred to as "cut positions", and the operation knobs (5a and (5) The position (5b) is referred to as an “adjustment position”. * Regarding the control circuit (7a), the power supply circuit (7b) and the energizing circuits (7c) (7d) * As shown in FIG. 10, the control circuit (7a), the power supply circuit (7b) And energizing circuits (7c) and (7d).

The power supply circuit (7b) is provided for the heaters (3a) (3b). The energizing circuit (7c) is for switching whether to supply electricity supplied from the power supply circuit (7b) to the heater (3a) .When the energizing circuit (7c) is on, the heater (3a) is turned on. ) And the heater (3a) is not energized when it is off. The energizing circuit (7d) is
This is for switching whether or not the electricity supplied from (7b) is supplied to the heater (3b) .When the power supply circuit (7d) is on, the heater (3b) is supplied and the heater (3b) is supplied. And the heater (3b) is not energized.

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. 12 is a flowchart showing a part of a control program for controlling the heaters (3a) and (3b), FIG. 12 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).

When both of the operation knobs (5a) and (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 heater (3b The flag (B) corresponding to the on / off state of () is set to “0” (step
(S34) (S38)). (A) is "0" when the heater (3a) remains off, "1" when the heater (3a) is on, and "2" when the heater (3a) is turned off from on. Similarly, (B) is “0” when the heater (3b) remains off, and the heater (3b)
Is "1" when is turned on, and "2" when the heater (3b) is turned off from on.

Subsequently, the timer is reset to start time measurement (step (S41)), and a heater control routine is executed (step (S42)). In this heater control routine, when (A) is not "1", that is, when "0" or "2", it is determined whether or not the operation knob (5a) has been operated from the "off position" to the "adjustment position". If it is determined that the operation has been performed, the energizing circuit (7c) is turned on and the heater (3a) is turned on (steps (S61), (S62), and (S63)). Also, (A) is "1"
(Step (S64)). When the operation is not performed, the energizing circuit (7c) is kept off (step (S62)
).

When (A) is "1", it is determined whether or not the operation knob (5a) has been operated from the "adjustment position" to the "off position". 7c) is turned off and the heater (3a) is turned off (step (S69) (S7
0) (S71)). Also, (A) is set to "2" (step (S72)
). When the operation is not performed, the energizing circuit (7c) is kept on (step (S70)).

When (B) is not "1", that is,
When "0" or "2", the operation knob (5b) is set to "OFF position"
Is determined to have been operated to the "adjustment position", and when the operation has been performed, the energizing circuit (7d) is turned on and the heater (3
b) is turned on (steps (S65) (S66) (S67)). or,
(B) is set to "1" (step (S68)). When the operation is not performed, the power supply circuit (7d) is kept off (step (S66)).

When (B) is "1", it is determined whether or not the operation knob (5b) has been operated from the "adjustment position" to the "off position". 7d) is turned off and the heater (3b) is turned off (step (S73) (S7
4) (S75)). Also, (B) is set to "2" (step (S76)
). When the operation is not performed, the power supply circuit (7d) is kept on (step (S74)).

When at least one of the heaters (3a) and (3b) is turned on in the heater control routine within 10 seconds after the time measurement by the timer is started, the heater control routine is repeatedly executed. (Steps (S42) (S43) (S44) (S45)). On the other hand, if both the heaters (3a) and (3b) remain off even after the lapse of 10 seconds, the power supply circuit (7b) is turned off and the power supply lamp (40) is turned off (step (S42)). (S43) (S45) (S49) (S50)). Then, the process returns to step (S31).

Further, when both of the heaters (3a) and (3b) are turned off after at least one of the heaters (3a) and (3b) is turned on, the power supply circuit (7b) is turned off. Turn off the power lamp (40) (Steps (S42) (S43) (S44) (S49) (S5
0)). Then, the process returns to step (S31). 10
If the power button (4) is pressed even within seconds, both the power supply circuits (7c) and (7d) and the power circuit (7b) are turned off and the power lamp (40) is turned off (step (S46) S47) (S
48) (S49) (S50)). Then, the process returns to step (S31).

In this device, if both the heaters (3a) and (3b) are kept off for 10 seconds after the power supply circuit (7b) is turned on, the steps (S42), (S43), (S45) and (S49) are performed. Since the power supply circuit (7b) is turned off by (S50), the power supply circuit (7b) is not left in the on state for 10 seconds or more. Therefore, the heater
In order to turn on at least one of (3a) and (3b), the operation of the power button (4) and the operation knobs (5a) (5
b) at least one of the two operations is always required,
The inconvenience of inadvertently operating the heaters (3a) and (3b) in one operation is reliably prevented.

When the power button (4) is pressed, the power circuit (7) is pressed.
If at least one of the operation knobs (5a) and (5b) is already in the `` adjustment position '' when the b) is turned on, the power supply circuit (7b) is turned on in steps (S34), (S35) and (S36). Turns off. Therefore, in order to turn on the heaters (3a) and (3b), the operation knobs (5a) and (5b) must always be operated to the "adjustment position" after the operation of the power button (4). This reliably prevents the inadvertent operation of the heaters (3a) and (3b) by one operation.

Further, a push-type power button (4) and a rotary operation knob (5a) (5b) protrude from the front surface of the case body (10a), and these power button (4) and operation knob ( 5a) (5
The effect of preventing the heaters (3a) and (3b) from being inadvertently operated is particularly remarkable, since b) is likely to be inadvertently operated due to contact with an object or the like. Also, since the power button (4) must be pressed continuously for 2 seconds to turn on the power circuit (7b), even if an object comes into contact with the power button (4) momentarily, the power circuit (7b) Does not turn on. Therefore, also in this respect, careless operation of the heater (3) is prevented.

In this device, a power button (4), a power circuit
(7b) and steps (S31) and (S32) correspond to the "power switching means" according to claims 2 and 4, and the operation knobs (5a) and (5b), the energizing circuits (7c) and (7d) and the steps (S62) (S63) (S66) (S67) (S7
0), (S71), (S74), and (S75) correspond to the "heater switching means" described in claims 2 and 4 described above. Further, steps (S43) (S45) (S
49) corresponds to the “control means” in claim 2 described above, and steps (S34) and (S36) correspond to “control means” in claim 4 described above.
Is equivalent to [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.

[0062] 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 adopted. 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.

Even when the control circuit outputs the off signal in the locked state, the forcible release mechanism provides
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 an enlarged view of an operation panel (11a) of FIG. 2;

FIG. 4 is a plan view of operation knobs (5) and (6a) of FIG.

FIG. 5 is a block diagram showing a main part of the drop-in stove (1).

FIG. 6 is a flowchart showing a part of a control program for controlling the heater (3).

FIG. 7 is a flowchart showing another part of the control program.

FIG. 8 is a plan view of a table stove (1a) according to a second embodiment of the present invention.

FIG. 9 is a front view of a table stove (1a).

FIG. 10 is a block diagram showing a main part of the table stove (1a).

FIG. 11 is a flowchart showing a part of a control program for controlling the heaters (3a) and (3b).

FIG. 12 is a flowchart showing another part of the control program.

FIG. 13 is a flowchart showing a heater control routine in the control program.

FIG. 14 is a front view of a conventional electric stove (9).

[Explanation of symbols]

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

Claims (5)

[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 power supply state for the power supply switching means. Control means for switching the power supply switching means to the non-supply state of the electricity in response to the non-operational state of the heater within a predetermined time from the time point when the power supply is switched to the heating 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 In response to all the non-operating states of the heater within a predetermined time from the time when the power supply switching means is switched to the power supply state, the power supply switching means Control means for switching to a supply state. 3. A heater, power supply switching means for switching whether or not to supply electricity to the heater, heater switching means for switching whether to operate the heater, and a power supply state for the power supply switching means. Control means for switching the power supply switching means to the non-supplying state of the electricity in response to the fact that the heater switching means has already been switched to the operation state of the heater at the time of switching to the heating apparatus. . 4. 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 for switching whether or not to operate each of the heaters And the power supply switching means in response to the fact that at least one of the heater switching means has already been switched to the operation state of the heater when the power supply switching means is switched to the power supply state. Control means for switching means to the non-supply state of the electricity. 5. The apparatus according to claim 1, further comprising a case body for housing the heater, wherein the power switching means has a press-type power button provided so as to protrude from the case body, and the heater switching means comprises 5. A rotary operation knob for the heater provided so as to protrude from the case body.
The heating device according to any one of the above.