JP2000171031A - Gas flow rate control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit sure driving of a flow rate control unit while restricting the consumption of a battery. SOLUTION: A gas flow rate control unit is constituted of a driving unit, employing a flow rate control unit for controlling the flow rate of gas and a stepping motor 34 for driving the flow rate control unit, and a driving control unit 58, controlling the driving of the driving unit. The driving control unit 58 is constituted so as to measure the number of driving times of the driving unit and when the same is the initial time, a power supply wherein a supplying power is increased to increase the torque of the driving unit is effected but, in usual, the device is operated by a saved power to elongate the life of the battery while the sure operation of the device can be effected with a high torque at the initial time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrically driven gas flow control device.

[0002]

2. Description of the Related Art Conventionally, as a gas flow control device having such a function, a gas flow control device using a geared motor is known.

[0003]

However, in the above-mentioned conventional geared motor type gas flow control device, it is difficult to control the fine moving distance, and only a stepwise change in flow control characteristics can be obtained, and more steps can be obtained. There was a disadvantage that it was difficult. In addition, when a battery power supply is used, its life is short, and it is not that a plurality of stoves can be used for a long time.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to enable reliable driving while suppressing consumption of a battery power supply.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a flow control unit for controlling a flow rate of a gas, a driving unit using a stepping motor for driving the flow control unit, The drive control unit is configured to perform drive control, and the drive control unit measures the number of times of driving of the drive unit, and when this is the first time, as a configuration for supplying power with increased supply power to increase the torque of the drive unit. Yes, it is possible to extend the life of the battery by operating normally with low power consumption, and to operate reliably with high torque at the first time.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas flow control device according to the present invention can be implemented by the constitutions described in the respective claims.

That is, a gas flow control device according to a first aspect of the present invention includes a flow control unit for controlling a gas flow rate, a driving unit using a stepping motor for driving the flow control unit,
A drive control unit configured to drive and control the drive unit, wherein the drive control unit measures the number of times the drive unit is driven, and when this is the first time, increases the power supply to increase the torque of the drive unit. The operation is usually performed with low power consumption to extend the life of the battery, and it is possible to operate reliably with high torque at the first time.

The gas flow control device according to claim 2 is
A flow control unit that controls the flow rate of gas, a driving unit that uses a stepping motor that drives the flow control unit, and a driving control unit that drives and controls the driving unit, wherein the driving control unit includes the driving unit The number of times of driving is measured, and when this is the first time, in order to increase the torque of the driving unit, the duty ratio is increased to supply electric power with increased power supply. , And the operation can be reliably performed at a high torque for the first time.

Further, a gas flow control device according to a third aspect of the present invention provides a gas flow control device for controlling a flow rate of a gas, a driving unit using a stepping motor for driving the flow control unit,
The drive control unit that controls the drive of the drive unit, the drive control unit measures the number of times the drive unit is driven, and when this is the first time, in order to increase the torque of the drive unit, supply at a low frequency. It is configured to supply more power, and it is usually operated with low power to extend battery life,
In addition, it is possible to reliably operate with high torque at the first time.

[0010]

An embodiment of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the embodiments described below are examples embodying the present invention, and do not limit the technical scope of the present invention.

FIG. 1 (a) is a perspective view showing the appearance of a gas cooker according to an embodiment of the present invention. The gas cooker has a left cooker 1 and a right cooker 3 equipped with a pan bottom temperature sensor 2. , A grill 4 and an operation unit 5. As shown in FIG. 1 (b), the operating unit 5 includes an ignition / extinguishing key 6 for the left hand, an ignition / extinguishing key 7 for the right hand, and a grill Ignition / extinguishing key 8, left-hand heating power adjustment keys 9 and 10, right-hand heating power adjustment keys 11 and 12, and grilling power adjustment keys 13 and 14,
Each of the setting keys (cooking mode setting means) 39 for inputting the setting of the cooking mode of the cooking stove of the left cooker, the heating display illuminant 15 for the right cooker, the heating display illuminant 16 for the right cooker, the heating display illuminant 17 for the grill, and the left cooker, 40, respective display lamps 42 and 43 for displaying their settings, a key 41 for setting a grill timer and its display lamp 44 are provided. The child lock switch 19 for prohibiting ignition operation is provided. A battery storage unit 20 for storing a battery for the battery is provided.

As shown in FIG. 2, the left cooking stove 1 includes a cooking bottom temperature sensor (pan bottom temperature detecting means) 2, a thermocouple (combustion temperature detecting means) 21, and a left cooking burner 23 provided with a spark plug 22. With this left-hand burner 23
Is supplied from a gas control block 25 that is controlled to be opened and closed by a control circuit 24. The gas control block 25 receives gas from a hose end 26, passes through a common solenoid valve 27, opens and closes a gas for a left-hand burner, and controls a heating power. Gas is supplied to the filter burner. The gas control units 29, 30, and 31 of the gas control block 25 are roughly divided into a flow control unit 33, a stepping motor 34 (hereinafter referred to as a motor) for driving the flow control unit 33, and a position of the flow control unit 33. It comprises an encoder 35 serving as a position detecting means.

With the above configuration, the child lock switch 1
9 is OFF, and turn on the ignition / extinguishing key 6
When the N operation is performed, the control circuit is turned on and the control circuit 24 is activated. Under the control of the control circuit 24, the left-hand gas control unit 29 is moved to the ignition flow rate position.
And the left burner 23 is ignited by the ignition plug 22.

The temperature detected by the pan bottom temperature sensor 2 and the temperature detected by the thermocouple 21 are input to the control circuit 24. Based on the input data and the setting input from the operation panel 5, the left cooking gas control is performed. By controlling the driving of the section 29 to adjust the flow rate of the gas supplied to the left-hand burner 23, the heating power can be adjusted by automatic control.

As shown in FIG. 2, the right hand burner 3 includes a right hand burner 36 provided with a thermocouple 21 and a spark plug 22 in a combustion portion thereof. The gas is supplied from a gas control block 25 controlled to be opened and closed by a control circuit 24. The gas control block 25 receives gas from a hose end 26, passes through a common electromagnetic valve 27, and opens and closes a gas for a right burner and controls a heating power.
Gas is supplied to the right hand burner 36 through 2.

With the above configuration, the child lock switch 1
9 is OFF, and turn on the ignition / extinguishing key 7
N, the control circuit 24 is turned on and the control circuit 24 is turned on.
With the control described above, the right-hand gas control unit 30 is moved to the ignition flow rate position, the main solenoid valve 27 is opened, and the right-hand burner 36 is ignited by the ignition plug 22.

The temperature detected by the thermocouple 21 is input to the control circuit 24. Based on the input data and the thermal power setting input from the operation panel 5, the right-hand heating flow control unit 3 is controlled.
By controlling the drive to 0, the flow rate of gas supplied to the right-hand burner 36 is adjusted, and the combustion state of the right-hand burner 36 is monitored based on the input heating temperature.

As shown in FIG. 2, the grill 4 includes a grill burner 37 provided with a thermocouple 21 and a spark plug 38 in a combustion portion thereof. Gas is supplied from a controlled gas control block 25. The gas control block 25 receives gas from a hose end 26, passes through a common source electromagnetic valve 27, a governor 28, opens and closes the gas of the grill burner 37, and controls the heating power. Supplied.

With the above configuration, the child lock switch 1
When the ignition button 8 is turned on after confirming that the ignition button 9 is OFF, the control circuit 24 is turned on, and the control of the control circuit 24 moves the grill gas control unit 31 to the ignition flow rate position. Then, the grill burner 37 is ignited by the ignition plug 38.

The temperature detected by the thermocouple 21 is input to the control circuit 24, and the grill flow rate control unit 31 is controlled based on the input data and the thermal power setting input from the operation panel 5.
Of the grill burner 37 is controlled by controlling the driving of the grill burner 37, and the combustion state of the grill burner 37 is monitored based on the input heating temperature.

As can be seen from the above configuration, the left stove 1,
The combustion state of each of the combustion units including the right cooker 3 and the grill 4 is controlled by the control circuit 24.

FIGS. 3 (a) and 3 (b) show a gas control block 25 of the gas cooker according to the present invention. Gas flows from a hose end 26 through an original solenoid valve 27 to a gas control unit 29 of each burner. , 30, 31. The gas entering the gas control unit of each burner enters through the cock body 33-1 of the flow control unit 33, passes through the flow control plate 33-2, and slides 33-3, and the gas outlet 33 of the cock body 33-1.
-4 and goes to the gas pipe 42 leading to the nozzle.

The flow control plate 33-2 is moved together with the slide closure 33-3 by a spring 33-5 with a cock body 33-.
1 and the gas sealing pressure. One end of a drive connection shaft 33-6 for driving a slide is fitted to the slide closing member 33-3, and the other end is connected to a drive connection portion 34-1 of the stepping motor 34.
Further, the drive connection shaft 33-6 has a pin 34-2, and the pin 34-2 is connected to a movable portion of an encoder 35 (position detecting means) fixed to the cock body 33-1 to drive. The moving state of the connecting shaft 33-6 is transmitted to the encoder 35 to detect the position. Also,
An O-ring 33-7 is used between the drive connection shaft 33-6 and the cock body 33-1 to perform gas sealing. The encoder 35 is a lead 35-1, the original solenoid valve 27 is a lead 27-1, and the motor 34 is a lead 3
It is connected to the control circuit 24 via 4-2.

The motor 34 is provided with a female screw 50 having a screw portion 49 on a shaft portion and fitted to the screw portion 49,
The drive connection shaft 33-6 is fixed to the tip of the female screw 50 to form the drive connection portion 34-1. Accordingly, when one driving pulse is transmitted to the stepping motor 34, the stepping motor 34 rotates by one pole and the screw portion 49 is rotated.
Also rotates by that amount, and the female screw 50 moves by that amount. As an example for reference, the number of motor poles is 24,
If the lead of the screw is 2 mm, 2/24 = 1 pulse
Move 0.08mm.

Therefore, when the stepping motor 34 is rotated, linear movement is performed in the drive connecting portion 34-1 and the drive connecting shaft 33-6 moves, and the slide closing member fitted to the tip of the driving connecting shaft 33-6 is closed. The child 33-3 moves. On the other hand, since the flow control plate 33-2 is fixed, the slide
The through hole provided in the center of 3-3 and serving as a gas passage control unit is sequentially aligned with the hole position of the gas flow control plate 33-2 serving as the gas flow control unit, and the gas flow rate is changed.
With the above configuration, the stepping motor 3
The torque of 4 applies a spring 33 for urging the slide closing element 33-3.
O-ring 33 for gas seal of -5 and drive connection shaft 33-6
-7 and the thrust load for driving the encoder 35, but the load of the spring 33-5 is
In the direction perpendicular to −3, the load is always constant in the sliding direction, and the load itself is small. In addition, since the flow rate control method is determined by the overlapping state of the through holes of the flow rate control plate 33-2 and the slide closure 33-3, the flow rate accuracy at each thermal power switching stage is significantly improved compared to the needle type. I do.

Also, only when it is necessary to adjust the gas flow rate,
Since the motor is driven, the motor does not normally operate, saving power and being compatible with the battery power supply.

However, even if the needle system is used, the contents described below can be implemented, and it is not limited to the slide type.

FIGS. 4A to 4C show the case where the encoder 35 is used.
FIG. As described with reference to FIGS. 3A and 3B, the pin 34 extends in the direction perpendicular to the drive connection shaft 33-6.
-2 is provided, and the amount of movement of the pin 34-2 is detected by the encoder 35. The encoder 3
Reference numeral 5 denotes a substrate 35-1 on which a pattern is printed, an outer body 35-2 constituting an outer shell, and a sliding body 35 for sliding the substrate.
-3 and a lead wire 35-4 for extracting a signal from the substrate. The sliding body 35-3 is provided with a current collector 35-5 that matches the pattern.

FIGS. 5A to 5F show an encoder 35.
It is a diagram showing the correlation between the pattern and the heating power and the number of pulses, there are five-stage heating power switching position of a closed position, a low heat position, a medium-low position, a medium-fire position, a medium-high position, a strong position, and the heat position with encoder 35 This is a configuration in which detection is to be performed using both stepping pulses.

At point A, track 1 is ON (track 4 (+
COM) and the track 1 are conducting due to current collection), and the tracks 2 and 3 are OFF. Track 4
(+ COM) is a common power supply pattern. This state indicates a closed state where the gas is shut off (the gas does not flow because the through hole 33a of the slide closing member 33-3 is not related to the hole 33b of the flow control plate 33-2).

In consideration of safety, this state allows only the track 1 to be in the ON state, and detects whether the lead wire is disconnected or short-circuited.
Others must not be turned on at the time of. When the track 1 is disconnected, the closed position is lost and the original solenoid valve is shut off (for example) to take care of fail-safe. In this position, the moving pulse of the stepping motor 34 is set to 0, and the pulse counter (described later) is also reset to 0.

In the B zone, tracks 1, 2, and 3 are both O
The state is the FF state, and represents a transition stage from the gas cutoff state to the valve open state. In the transition stage, each track is in an OFF state, and even if the pulse counter reaches a predetermined number of pulses, the track does not reach the predetermined position even when the drive unit is fixed and the stepping motor 34 does not rotate, for example. The structure is designed to recognize this, and safety is taken into consideration.

Point C is in a weak position at tracks 1, 2, OFF and track 3, ON. Flow control plate 33-2
Gas flows in from one of the minimum hole positions and is supplied to the nozzle 32 through the gas pipe 42 (in the case of the low heating power state, FIG.
As shown in FIG.
The minimum flow rate flows through one small hole of 3-2).

The driving pulse of the stepping motor 34 starting from the point A is 3.58 of moving distance / 0.08 mm of moving amount per pulse = 45 pulses. In particular, regarding the minimum position, when moving to the closing side from this position, it temporarily closes and the supply of gas is shut off, and when it is moved again in the opening direction, it becomes inevitable that raw gas comes out. The configuration is such that the number of pulse counters and the encoder 35 are checked to ensure safety.

Track D is track 1, OFF, track 2,
3, ON, indicating the medium-low heat position. At the middle low heat position, gas flows from two hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 via the gas pipe 42. Also, A
The driving pulse of the stepping motor 34 starting from the point is a moving distance of 5.2 / a moving amount per pulse of 0.08 mm.
= 65 pulses.

The safety is intermediate between the minimum heating power position and the maximum heating power position, and the necessity of double confirmation is reduced. However, since the detection of the position is performed by both the encoder 35 and the pulse counter, For example, the position can be reliably detected even when the pulse counter malfunctions due to the influence of noise, and the usability is improved accordingly.

Point E is track 1, OFF, track 2,
When the track 3 is switched from ON to OFF, the medium heat position is indicated. At the middle fire position, gas flows in from three hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 via the gas pipe 42 as shown in FIG. Further, the stepping motor 34 starts from the point A.
In the driving pulse of (1), the moving distance is 6.7 / the moving amount per pulse is 0.08 mm = the number of pulses is 84.

Therefore, the position can be confirmed by both the pulse counter number and the encoder 35 as in the case of the point D.

Point F is Tracks 1, 3, OFF and Track 2 ON, indicating a medium-high heat position. At the middle high heat position, gas flows in from the four hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 via the gas pipe 42. Further, the driving pulse of the stepping motor 34 starting from the point A has a moving distance of 8.2 / a moving amount per pulse of 0.08 mm.
= Pulse number 102.

In this case, the pattern position of the encoder 35 is not determined, but is managed only by pulse management.

The position of the point F does not match the pattern of the encoder 35, and is determined by the value of the pulse counter. The reason is to reduce the cost by saving the pattern of the encoder 35, but since it is easy to perform all the positions with the encoder 35 as an explanation of one embodiment, this F point is Examples are given that do not match. In particular, with regard to safety, a slight pulse counter fluctuation is harmless to safety by adjusting the heating power in a range between the minimum position and the maximum position and ensuring the combustion state. Further, the accuracy of position detection can be implemented because the number of pulses from the front and rear positions is small and software processing that does not accumulate errors is possible.

At point G, track 1 is off, track 2
Reference numeral 3 is ON, indicating a high-fire position. At the high heat position, gas flows in from the largest hole of the flow control plate 33-2 and is supplied to the nozzle 32 through the gas pipe 42 as shown in FIG. Further, the stepping motor 34 starts from the point A.
Is the moving distance 11.4 / the moving amount per pulse 0.08 mm = the number of pulses 143.

The position of the maximum heating power position is detected by double detection of the encoder 35 and the pulse counter. Moving beyond the maximum position results in applying an unreasonable load other than normal use to the gas flow control mechanism,
This is also necessary for the purpose of preventing the reliability of the mechanism from being reduced.

FIGS. 6A and 6B are diagrams showing the correlation between the pattern of the encoder 35 and the heating power and the number of pulses. The closing position, the low-heating position other than the high-heating position, the medium-low position, the medium-high position, and the medium-high position. At the four-stage heating power switching position, the position is not matched with the encoder pattern position, and shows a method of determining the position by the number of pulses while correcting at the encoder position (points A and B zones, and point G The description is omitted because it is the same as FIG.

At the point C, the tracks 1 and 2 are OFF and the track 3 is ON (α position), and the position obtained by counting two pulses from this position is a weak position. Gas flow control plate 3
The gas flows from the minimum hole position 3-2 and is supplied to the nozzle 32 through the gas pipe 42. The driving pulse of the stepping motor 34 starting from the point A has a moving distance of 3.78.
/ Moving amount per pulse 0.08 mm = 47 pulses. Therefore, the weak position becomes the weak position when the encoder 35 transmits two pulses after the (α position) is determined.

At point D, track 1 is off, track 2 is
Reference numeral 3 indicates ON (β position), and a position obtained by counting three pulses from this position is a medium-low-fire position. The gas flows in from the two hole positions of the flow control plate 33-2 at the middle low heat position, and is supplied to the nozzle 32 via the gas pipe 42. Further, the driving pulse of the stepping motor 34 starting from the point A has a movement distance of 5.4 / a movement amount of 0.08 mm per pulse.
= 68 pulses. Therefore, the weak position becomes the middle weak position when the encoder 35 transmits three pulses after the (β position) is determined.

The point E is a position where two pulses are counted from the time (γ position) when the track 1 is turned off, the track 2 is turned on, and the track 3 is switched from the ON state to the OFF state. At the middle fire position, gas flows in from the three hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 via the gas pipe 42. Further, the driving pulse of the stepping motor 34 starting from the point A is a moving distance of 6.7 / a moving amount per pulse 0.08 mm = 84 pulses. Therefore, the weak position becomes the middle position when three pulses are transmitted after the encoder 35 determines (γ position).

The point F is a position where the number of pulses has been counted from the point (γ position) when the track 1 is turned off, the track 2 is turned on, and the track 3 is switched from the ON state to the OFF state (γ position). In the middle high heat position, the flow control plate 33-2
Gas flows in from the four hole positions of and through the gas pipe 42,
It is supplied to the nozzle 32. Further, the driving pulse of the stepping motor 34 starting from the point A has a moving distance of 8.4.
/ Moving amount per pulse 0.08 mm = number of pulses 105. Therefore, the weak position is determined by the encoder 35 (γ position).
When 21 pulses are transmitted after the determination, the position becomes the middle position.

As described above, the advantage that the low heat position, the medium low position, the medium heat position, and the medium high position are not matched with the encoder pattern is that the variation of each component during production is intended to be absorbed by the microcomputer software. For example, if the microcomputer software does not support this, it is necessary to correct the pattern of the encoder 35 and the position of the small hole of the flow control plate 33-2. However, according to this method, only the software processing is supported. It is possible, and the time for fine adjustment can be reduced, and the repair cost can be reduced.

FIGS. 7A and 7B are diagrams showing the correlation between the pattern of the encoder 35 and the heating power and the number of pulses. The encoder 35 detects the position only at the closed position. With respect to the medium fire position, the medium strong position, and the strong position, the position is controlled by the drive pulse of the stepping motor 34 without using the encoder 35.

At the point A, the track 1 is ON (the pattern 2 and the track 1 are in a conductive state by current collection), and this state indicates a closed state in which the gas is shut off. Also,
In this position, the movement pulse of the stepping motor 34 is 0.
, And a pulse counter (described later) is also reset to 0.

At point C, gas flows in from the minimum hole position of the flow control plate 33-2 and is supplied to the nozzle 32 through the gas pipe 42. The driving pulse of the stepping motor 34 starting from the point A is 3.78 in the moving distance / 0.08 mm in the moving amount per pulse = 47 pulses. Therefore, the weak position is a weak position at a position where 47 pulses have been counted from the point A.

A point D indicates a medium-low heat position. At the medium-low heat position, gas flows from two hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 through the gas pipe 42. Also, A
The driving pulse of the stepping motor 34 starting from the point is a moving distance of 5.2 / a moving amount per pulse of 0.08 mm.
= 65 pulses. Therefore, the middle weak position is the middle weak position at a position where the pulse number 65 is counted from the point A.

The point E indicates the middle fire position. At the middle fire position, gas flows from three hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 via the gas pipe 42. The driving pulse of the stepping motor 34 starting from the point A is:
The moving distance is 6.7 / the moving amount per pulse is 0.08 mm = 84 pulses. Therefore, the middle fire position is the middle fire position at a position where 84 pulses have been counted from the point A.

A point F indicates a medium high heat position. At the medium high heat position, gas flows in from the four hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 through the gas pipe 42. Also, A
Starting from the point, the driving pulse of the stepping motor 34 has a moving distance of 8.2 / a moving amount per pulse of 0.08 mm.
= Pulse number 102. Therefore, the medium-fire position is a medium-high-fire position at a position where 102 pulses have been counted from the point A.

A point G indicates a high-fire position. At the high-fire position, gas flows in from the largest hole of the flow control plate 33-2 and is supplied to the nozzle 32 via the gas pipe 42. The driving pulse of the stepping motor 34 starting from the point A is a moving distance 11.4 / a moving amount per pulse 0.08 mm = the number of pulses 143. Therefore, the middle fire position is a high fire position at a position where the number of pulses is counted 143 from the point A.

This system has a simple configuration of the encoder 35 and shows a configuration ensuring the minimum security, and has the advantage that it can be provided at a low cost.
However, with respect to the flow rate accuracy, there remains a problem that a variation width due to accumulation of errors in thermal power switching becomes large, and a flow rate regulation at each stage is difficult to guarantee unless the fire is extinguished occasionally with a configuration that is weak against noise.

FIGS. 8A and 8B are diagrams showing the correlation between the pattern of the encoder 35 and the heating power, and the number of pulses. The encoder 35 detects the position only at the closed position and the strong position. For the weak position, medium fire position, and medium strong position, the position control is performed by the drive pulse of the stepping motor 34 without using the encoder 35.

At point A, when track 1 is ON (track 4 (+
COM) and the track 1 are conducting due to current collection), and the patterns 2 and 3 are OFF. Track 4
(+ COM) is a common power supply pattern. This state indicates a closed state in which gas is shut off.

At point C, gas flows in from the minimum hole position of the flow control plate 33-2 and is supplied to the nozzle 32 via the gas pipe 42. The driving pulse of the stepping motor 34 starting from the point A is 3.78 in the moving distance / 0.08 mm in the moving amount per pulse = 47 pulses. Therefore, the weak position is a weak position at a position where 47 pulses have been counted from the point A.

A point D indicates a medium-low heat position. At the medium-low heat position, gas flows from two hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 through the gas pipe 42. Also, A
The driving pulse of the stepping motor 34 starting from the point is a moving distance of 5.2 / a moving amount per pulse of 0.08 mm.
= 65 pulses. The length from the weak position is 1.
At 62, the number of pulses from the weak position is 20 pulses. Therefore, the middle weak position is the middle weak position at a position where the pulse number 65 is counted from the point A.

The point E indicates the middle fire position. At the middle fire position, gas flows from three hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 through the gas pipe 42. The driving pulse of the stepping motor 34 starting from the point A is:
The moving distance is 6.7 / the moving amount per pulse is 0.08 mm = 84 pulses. The length from the middle to weak position is 1.5
Thus, the number of pulses from the middle to weak position is 19 pulses. Therefore, the middle fire position is the middle fire position at a position where 84 pulses have been counted from the point A.

A point F indicates a medium high fire position. At the medium high fire position, gas flows in from the four hole positions of the flow control plate 33-2 and is supplied to the nozzle 32 through the gas pipe 42. Also, A
Starting from the point, the driving pulse of the stepping motor 34 has a moving distance of 8.2 / a moving amount per pulse of 0.08 mm.
= Pulse number 102. The length from the middle fire position is 1.5, and the number of pulses from the middle fire position is 19 pulses. Therefore, the medium-fire position is a medium-high-fire position at a position where 102 pulses have been counted from the point A.

At point G, track 1 is off, track 2 is
Reference numeral 3 is ON, indicating a high-fire position. At the high heat position, gas flows in from the largest hole of the flow control plate 33-2 and is supplied to the nozzle 32 through the gas pipe 42. The driving pulse of the stepping motor 34 starting from the point A is a moving distance 11.4 / a moving amount per pulse 0.08 mm = the number of pulses 143. The length from the middle to weak position is 4.7
Thus, the number of pulses from the medium-high position is 59 pulses. Therefore, the high heat position is determined by the pulse counter number and the encoder 35.
It is possible to check on both sides.

This method is a compromise in which the closed position and the strong position are detected by both the pulse counter and the position detection. By confirming the position of the strong position, the error of the position of the pulse counter is corrected at the strong position. It is possible to eliminate the accumulation error of the flow rate accuracy (accumulation of the error due to the reciprocal sliding between strong and weak points causes a deviation from the predetermined position) and move it beyond the maximum position, and use the gas flow control mechanism for other than normal use. The purpose of preventing a decrease in the reliability of the mechanism due to the application of the load can be achieved.

FIGS. 9A and 9B show the individual gas control units 2.
9 shows the play in the thrust direction of the flow control structure of No. 9 in which the stepping motor 34 rotates and the rotation is
FIG. 13 is a diagram illustrating a transmission error during sliding of a slide closure 33-3 engaged with a distal end of a drive connection shaft 33-6 via -1. Further, since the drive of the encoder 35 is connected to the drive connection shaft 33-6 by the pin 34-2, a position error occurs during the reciprocating movement of both the movement of the slide closing member 33-3 and the movement of the encoder 35.
The purpose of these explanations is to correct the error with microcomputer software and to take measures to keep the correct position at all times.

The stepping motor 34 has a play A in the thrust direction, the drive connecting portion 34-1 for converting the rotation of the motor in the thrust direction has a play B between the lead screws, and is pressed into the drive connecting shaft 33-6. Drive connection 34
-1 pin 34-2 and the connecting portion of the encoder 35 are C
There is a D play between the female screw and the drive connection shaft 33-6, and an E play between the slide closure 33-3 engaged with the tip of the drive connection shaft 33-6. Each rattling increases with the number of thermal power changes as an error in the slide distance in the slide closing direction and in the closing direction. For example, A = 0.5B = 0.1, C = 0.2, D = 0.1,
Assuming E = 0.2, the sum is 1.1. As described above, if the moving distance of one pulse of the motor is 0.08, the error is 14 pulses. This error occurs every time the rotation direction between the closing direction and the opening direction is changed.

For example, from the state of FIG.
When shifting to the state (b) (from strong combustion to weak combustion),
The motor strikes the backlash of A 0.5 / 0.08 = 6 pulses and performs the contact change of 0.1 / 0.08 = 1 pulse of the backlash B of the screw, and the encoder 35 of C and the pin The contact position is changed by 0.2 / 0.08 = 3 of the play C and D
0.2 / 0.08 = 3 female screw and drive connection shaft 33
The contact position of -6 is changed, and the slide closing member 33-3 slides by 0.1 / 0.08 = 1 pulse of the play E between the slide closing member 33-3 and the drive connection shaft 33-6. These backlashes are not constant due to manufacturing variations and vary over a certain width.

On the other hand, a flow control plate 33-
The pitch of the small holes of No. 2 is 1.62 in the distance from low to medium low.
mm, which is 20 pulses, and there is a large difference between the error that changes every production and the positional accuracy of the flow control. To solve this problem, there is an improvement in the accuracy of individual components, but it is not suitable for gas cooking appliances at all in terms of cost.

In the present invention, in order to be able to use even a large error, a comparison between the position of the encoder 35 and the pulse counter is used, and the error is absorbed when the microcomputer software is used in a state in which the encoder 35 is incorporated. After moving a predetermined pulse (for example, 10 pulses) from the end of the encoder 35, the pulse is moved in the reverse direction and reaches the end of the encoder 35 (for example, 20 pulses). The pulse is an error of the device, and when the moving direction is different, by adding this error, the correct heating power position can be always set. This is performed by microcomputer software processing, and the processing contents of this microcomputer software will be described later.

Next, the configuration of the control circuit will be described. In FIG. 10, the control circuit 24 supplies a constant voltage from the battery power supply 51 to the control circuit 24 via the constant voltage control means 52, and the stepping power is supplied directly from the battery power supply 51 to the motor ICs 53, 54 and 55. The power is supplied to the solenoid valve 27, and the power is also supplied to the solenoid valve 27 via the original solenoid valve output 56. Voltage detecting means 5 for detecting the voltage of battery 51
7, and the measured voltage is input to the drive control unit 58.

The drive control unit 58 controls the operation and display block 6
5, input keys and displays 69, 70, 71 of the left and right hot rolls 66, 67 and the grill 68, key input determining means 72 for determining key input of the child lock switch 19, an output stage 73 of the various displays, When a key input is instructed, only one motor is driven from the viewpoint of power supply capability because of the battery power supply, and there is a comprehensive operating means 64 for controlling the priority when driving the motors simultaneously. Further, the left-hand-wheel-drive determining unit 59 of the left-hand wheel 1 operated via the general operating means 64 in accordance with an instruction from the key-input determining means 72.
The right-hand heating device 3 of the right-hand heating device 3 and the grill 4
There is a grill drive judging section 61, and further operates according to the instruction of each drive judging section, based on a voltage judging means 81 for judging a power supply voltage, based on a motor IC 53 for a left cooking stove, a motor IC 54 for a right cooking stove, Power saving determining means 7 for varying the power supply state to the motor IC 55 to save power
5, and gas control units 29, 30,
There is a motor speed control means 76 for controlling the speed variable output to the left cooking motor IC 53, the right cooking motor IC 54 and the grill motor IC 55 according to the heating power adjustment position 31 and the heating power setting conditions.

In addition to the above, a demonstration mode determining means 78 for performing a demonstration mode (to explain the equipment) by a specific input of the key input (for example, by continuously pressing the same key), a state of parts of the flow control block and an inspection of a finished product Inspection mode determining means 77 for determining whether the state is the state, and inspection mode input / output terminal 6
2. Ventilation interlock determination means 80 for varying the state of ventilation according to the state of the heating power of the left and right stoves and the grill, its ventilation interlocking terminal 63, control circuit 24 and each gas control unit 2.
9, 30, 31 and failure determination means 79 for determining various failure states of the solenoid valve output circuit 56 to determine whether to stop the device individually or as a whole, and to display the failure state on a display unit to provide a service response capability. And a failure display determining means 74 for the purpose of improving

Further, the left-hand heating unit 59 of the left-hand heating device 1 is determined.
Has a cooking mode determining unit 83 that determines the cooking mode in combination with the setting input of the cooking mode designation input from the operation panel 5 via the temperature determining unit 82 that determines the temperature of the temperature data input from the temperature sensor 2. Further, it has a non-sticking determination unit 84, an overheating prevention determination unit 85, a temperature adjustment determination unit 86, and a water heater determination unit 87 according to the cooking mode.

The drive judging units 59, 60, 61 of the left and right stoves 2, 3 and the grill 4 monitor the combustion based on the temperature detection data input from the thermocouple 25, and the time elapsed from the ignition by the timer. In the event of an emergency such as going out or forgetting to turn off based on the time measurement data, control is performed to close the gas control units 29, 30, and 31 of the left and right stoves or the grill.

A method of controlling the gas cooker by the control circuit 24 having the above configuration will be described with reference to the following flowchart. S1 shown in each flowchart,
S2... Are the step numbers indicating the processing procedure, and coincide with the numbers added to the text.

First, FIG. 11 shows the key input state of the ignition and fire extinguishing operations.
S1 when the child lock 19 is OFF, S2 when the ignition key is pressed for 0.3 seconds or more in a state where various operation keys are received, it is determined that a key input is present, and
Then, the right cooker S4 and the grille S5 are checked, the corresponding cooker is stored, and then S6, and it is determined whether the corresponding cooker is in use or not S7. If the corresponding stove is in use, the general operation means 64 is instructed that the fire extinguishing operation is the fire extinguishing operation and the priority is 1 (S8), the memory of the corresponding stove is erased S9, and the same key is continuously pressed for a predetermined time or more. S10 is determined whether or not the operation has been performed. If it has been pressed, an instruction is given to the failure determination means 79 to the effect that the ignition key has failed (S11). If the stove is not in use S7, the ignition means and the priority 2 are instructed to the general operation means 64 in S12, and whether the same key is continuously pressed for a predetermined time or more S10. Is determined. When the button is pressed, the S11 configuration is provided to instruct the failure determination means 79 that the ignition key has failed.

The meaning of setting the priorities and operating the motor means that in the case of a battery power supply, if a large load is applied at one time, an extreme voltage drop will occur, and the voltage of the microcomputer will also drop and stop. In order to prevent this, consider not to rotate multiple motors at the same time. In this case, priorities are set according to usage events for safety and convenience. Priority 1 is fire-extinguishing operation, Priority 2 is ignition operation, priority The degree 3 is a manual heating power adjustment operation, and the priority 4 is an automatic heating power adjustment operation.

The consideration of keeping the ignition key pressed is a means for avoiding a dangerous state in which, for example, a water droplet has entered the key, an object has pressed the key, or the switch has been turned on without permission. In the same manner, a safety timer is provided for the heating power adjustment key.

FIGS. 12 and 13 show key input states for heat power adjustment. FIG. 12 shows a key input method for simple five-step heat power control, and FIG. 13 shows a linear heat power control for five-step heat power control. FIG. 5 shows an example of a key input for heat power adjustment for performing an operation for switching control. FIG.

In FIG. 12, key input determining means 72
Determines whether the stove is in use or not, S13. If the stove is in use, determines whether the thermal power adjustment key input is 0.1 seconds or more in S14. In that case, the left stove is S15, the right stove is S16, and the grill is S17. Is determined, and the corresponding cooking stove is stored, S18, the thermal power is determined as UP or S19, or DOWN or S20, and the general operation means 64 is instructed together with the priority 3 in S21, and the same key is continuously pressed for a predetermined time or more. It is determined whether or not S22 has been performed. If it is pressed, the S23 configuration is provided to instruct the failure determination means 79 that the thermal power key has failed.

In FIG. 13, key input determining means 72
Determines whether the stove is in use S24, if it is in use, determines whether the thermal power adjustment key input is 0.1 seconds or more, S25, in which case left stove S26, right stove S27, grill or S27- 1 is determined, and the corresponding stove is stored in S28, and it is determined whether the pressing time of the heating power key is 0.3 seconds or more in S29. In the following cases, as in FIG.
Whether WN or S31 is determined, an instruction is given to the general operating means 64 together with the priority 3 and S32, and S33 is determined whether the same key is continuously pressed for a predetermined time or more. If the button has been pressed, the failure judging means 79 is instructed to indicate that the thermal power key has failed (S34).

On the other hand, in the case of 0.3 seconds or more (linear thermal power control), S29 determines whether the thermal power is UP or S35, or DOWN or S3.
6, and instructs the general operating means 64 together with the priority 3 by the linear thermal power control in S37, and determines in S38 whether the same key is continuously pressed for a predetermined time (10 seconds) or more. If it has been pressed, an instruction is given to the failure determination means 79 to the effect that the thermal power key has failed (S39).

Since the time for which the thermal power key for linear thermal power adjustment is kept depressed is longer than that for stepwise thermal power switching, the safety timer is set to a long time in S38.

FIG. 14 shows the contents of the key input determining means 72 for the various cooking mode keys for the left cooking stove in the operation section 5. If a cooking mode key has been input, S40, it is determined whether the key is not a water heater key, S41. If so, a water heater mode is determined, S42. If not, it is determined whether the key is a tempura high key, S43, otherwise, a tempura low. The key is S45, and if so, the tempura high mode is selected and S44, and it is determined whether the water is hot, the tempura is high, or the tempura is low, respectively. After that, it is checked whether the left cooking stove is in use or not, and if it is in use, it is confirmed whether it is within one minute after ignition. If it is less than one minute, it is determined through the next-stage general operating means 64 that the left cooking stove is driven. Instruct S59 to S59
8, otherwise, S47, reset the input state to the original state S52. If not used, S46 is
In step S49, a timer is operated to check if an ignition operation is performed within a predetermined time. S50.
To S48, and if there is no ignition operation, reset and return to the original S52.

The cooking mode is input for one minute before and after the ignition operation. However, basically, the cooking mode is set before the ignition and the ignition is performed. It is possible. The reason why it is not accepted when one minute or more elapses is that the cooking software corresponding to the cooking mode is being executed, and the change in the middle deteriorates the quality of cooking. However, although not shown, the movement within the mode is free, and for example, consideration is given to moving the tempura from low to high to improve usability. The above is the description regarding the setting of the cooking mode key.

FIG. 15 shows the contents of the key input determining means 72 in the demonstration mode different from the normal use mode. The demo mode is a mode for explaining the operation of the appliance, and the contents of the demo mode are not constant.
Here, the determination of the key input will be described.

It is determined whether or not the input of the water heater key 39 is longer than 0.1 second S53, the counter is counted S54, and it is determined whether there are four consecutive times S55, and if there is, the input of the tempura high key 40 is 0.1. It is determined whether there is a second or more in S56, and the counter is counted S57.
8. It is determined that the mode is the demo mode, and the total operation means 64
To indicate that the mode is the demo mode.

The above contents are an example of specific contents of the key input judging means. Next, the contents of the next-stage overall operating means 64 via the above-mentioned key input determining means will be described below.

The overall operation means 64 shown in FIG. 16 determines whether there is an ignition key input in S60, and determines whether the voltage of the voltage detection means 57 for detecting the battery voltage is less than or equal to 3.2 V by the voltage determination means 81 in S61. In the following cases, it is determined whether or not the normal use mode is the demonstration mode in S62. In the above case, the process is shifted to the inspection mode determination unit 77 as the inspection execution mode in S6.
3. Note that the inspection mode determination means 77 is separately described. If the voltage is 3.2 V or less, it is determined whether or not the mode is the demo mode, and S62,
In the case of the demonstration mode, the process proceeds to the demonstration mode determination means 78 (S64). The demo mode determination means 78 will be described separately.

If the mode is not the demonstration mode, S62, it is determined whether the instruction is a cooking mode instruction or not, and if the instruction is a cooking mode instruction, the content is instructed to the cooking mode setting means of the left-hand drive determining apparatus S66. If it is not a cooking mode instruction S65, it is determined whether it is an ignition instruction S67, and if it is an ignition instruction, it is determined whether another stove is used S68, and if no other stove is used, drive to the corresponding stove Instruct S69,
After that, the original solenoid valve 27 is opened, S70, and the igniter output 88
S71.

If the instruction is not an ignition instruction, S67; if it is a fire extinguishing instruction or an instruction to change the heating power, S67-1; it is determined whether or not another motor is rotating; ), If another motor is rotating, S67-2, it is determined whether the priority during rotation is earlier than the priority of the corresponding stove, and S67-3, and if it is earlier, the rotating motor is stopped. Then, a driving instruction is issued to the corresponding stove S72. Otherwise, S67-3 saves the drive of the corresponding stove and waits until the rotation is completed, and then instructs the drive of the corresponding stove after the stop (S73). If the other motor is not driven, a drive is instructed to the corresponding stove at S67-2 (S74).

FIG. 17 shows the contents of the stove drive judging section, which is operated by an instruction from the general operating means 64. First, the state of the encoder 35 is determined by the position determining means 90.
(Correlation table shown in FIG. 5), the read current position is set as S75,
It is determined whether the instruction is a closing instruction in step S76, and if the instruction is a closing instruction, it is confirmed that the position is the closing position.
To step S78, and in the case of the closed position, return to step S76.

If the instruction is not the closing instruction S76, it is determined whether the instruction is the ignition instruction or not at S79.
0, the target position of the thermal power is set to the medium-high position, the number of pulses is set to 102, S81, the speed is increased to instruct the rotation direction to the high direction, S82, and the lamp is instructed to be medium-high in S.
83. Thereafter, a pulse is output via the motor IC via the power saving determination means (7) S84 and the motor speed control means (76) S85 in the drive control section 58, and S86, the number of pulses output to the motor by rotating the motor "N = N + 1" in step S87. When the count number of the pulse counter becomes “20 count <N”, S88, it is checked whether the encoder position is in the B zone “000”, S89, otherwise, “Motor error S”
UB "S90 (separately described), and if so, it is determined whether the pulse counter has reached" 102-M <N "which is M pulses before the number of 102 pulses at the medium-high position as the target position, and S91 is reached. It is determined whether or not the encoder 35 is at the medium-high position “010”, which is the target position, only when the step S92 is performed. When the encoder 35 is not at the target position, the value N of the pulse counter is obtained by adding M to the number of pulses 102 at the medium-high position. It is determined whether or not the value is equal to or more than "102 + M <N" in S93. If not, the process returns to S84. If so, the process jumps to the motor error SUB S94 (the motor error SUB will be described later).

On the other hand, if the encoder position has reached the target medium-high position, the number of medium-high pulses (1
02) and corrects it in S95, instructs the igniter to turn on S96, and determines whether there is a thermoelectromotive force for determining that the burner has ignited.
Is there an electromotive force? S97; if not, it is determined whether 7 seconds have elapsed. S98. If 7 seconds have elapsed, the igniter is turned off and S
99, S100 as a TC error, and S101 instructing the failure determination means 79. If a thermoelectromotive force is generated within the above 7 seconds S97, the igniter is turned off and S102, it is determined whether there is a thermoelectromotive force again in S103, and if there is a thermoelectromotive force, it is determined whether two hours have passed and S104, 2 When the time has elapsed, a fire extinguishing instruction is issued in S105. When the thermoelectromotive force is lost, S
103, S100 going to TC error processing.

If the instruction is not an ignition instruction, S79, it is determined whether the operation is a fire extinguishing operation, and if it is not an extinguishing operation, the process proceeds to change the heating power (described in FIG. 18). In the case of the fire extinguishing operation, first, the target position is set to the closing position, the target encoder position is set to the closing position “100”, and the number of pulses is calculated as the closing movement pulse K (the number of pulses from the current position to the closing position is substituted into K (FIG. 5). (See the correlation table shown in FIG. 7)) S107. Then, the speed is set to the high speed, and the rotation direction is set to the weak direction in S108.
It is determined whether the encoder position is in the position of "low to medium low" in step S110.
1. Otherwise, high-speed instruction S112.

Thereafter, the power saving determination means (75) S113 and the motor speed control means (76) in the drive control unit 58
A pulse is output via the motor IC via S114 and S115, and the number of pulses output to the motor by rotating the motor is counted by a counter "K = K-1" S11.
6. It is determined whether the count number of the pulse counter has reached the position P before the target position K by "K <P" (S117). Only when the count has reached, the encoder 35 determines whether the encoder 35 is at the target position of the closing position "100" (S118). In that case, the number of pulses at the encoder position at that time is replaced with 0 and S11
9. S120 instructing the drive control unit 58 to end the fire extinguishing position setting. If the encoder 35 is not at the target position, ie, the closing position “100” S118, the pulse counter subtracts P1 from the target pulse number K, “K <−P1”.
If not, return to S121 and S110, and repeat S121. If so, S121, motor error SUB
Go to S122. The reason why the current position is always checked is to check the closed position of the hot water heater that is not being used while using the hot water heater to ensure safety. The reason why the ignition position is set to the medium-high position is to take measures against sleeve fire at the time of ignition for the purpose of medium-fire ignition, and to eliminate anxiety caused by sudden ignition with high heat. The two-hour timer is a hidden timer that prevents you from forgetting to turn it off.
Consideration was given to safety and energy saving.

At the time of ignition, the position of the encoder 35 is confirmed with the output of 20 pulses in order to confirm whether the closing is movable due to insufficient torque at the time of initial movement, and if the closing is not moving. In such a case, the motor is rotated with a torque-up electric power, which will be described later, and has a characteristic that it is operated at a low torque at first to reduce the electric power.

Next, referring to FIG. 9, it has been explained that the pulse number and the position may not match due to rattling of the mechanism when used repeatedly in the strong and weak directions. FIG. 18 shows the contents of the processing to be eliminated by performing the processing once after ignition.

FIG. 18 shows an error detection process, in which the speed is set to a high speed and the rotation direction is set to a strong direction. S123, power saving judgment means (75) S124 and motor speed control means (7
6) A pulse is output via S125, S126, the number of pulses is counted by a counter, and "N = N + 1" S127,
Check whether a numerical value is substituted in (a1), S128,
If not substituted, the encoder position is set to the middle high position (01
0), and returns to S124 until it reaches 0. If so, the number of pulses is stored in (a) and stored in S13.
0, at which point the target pulse is changed to (a) +10 and S1
31, and stored in (a1), returning to S132 and S124,
When (a1) is no longer 0, S128, (a1) = N
S133, S124 and S133 are repeated until the time is reached.

When (a1) = N, the flow goes to step S133, in which the rotation direction is instructed to rotate in the weak direction S134, and the power saving means (7
5) S135 and motor speed control means (76) S136
And count the number of pulses with a pulse counter (q
= Q + 1) S137, the encoder position is the middle strong position (01
S138, and the number of pulses when it is reached is stored in (a2) and S139, (a3) = (a2)-
The inherent error of the device is calculated in (a1) and S140, (a3)
Is stored as an error during the reciprocating motion, and is added every time when the motor is reversed, thereby improving the accuracy of the heating power adjustment.

The above operation is performed only once at the time of the ignition operation, and this operation makes it possible to eliminate component variations. The above uses battery power,
This is an event when the power supply is turned off every time. When a storage element is used, the power supply may be set at the time of manufacturing. For a home power supply, the power supply may be performed once when the power supply is turned on.

Next, the burner drive judging means 59 in the case where an instruction to change the thermal power is issued from the general operating means in the drive control section 58.
It shows the operation of. There are two methods of changing the thermal power: 5-stage thermal power change and 5-stage + linear thermal power change.
FIG. 20 shows a case of a 5-stage + linear heating power change.

In FIG. 19, it is determined whether the heating power change instruction is UP or not at S143. If UP, the current position is not accepted if the current position is the strong position, and if not, the target position is set to the current heating power +1 at S145 and the lamp is set to 1 In step S146, the current encoder position is changed from the current encoder position to the next higher encoder position E based on FIG. 5, and in step S147, the number of output pulses P of the motor drive is selected, and "number of pulses = current pulse (G) + P""S148, S149 for instructing the rotation direction to be the strong direction. It is determined whether this is the same direction as the previous rotation direction and S1
50, in the case of the same direction, "target pulse number = pulse number" is set as S151, and in the case of not the same direction, the value obtained by adding the correction (a3) to the pulse number is set as S152.

For the speed instruction, S153 when the encoder position is in the low-medium-low range, instructs the speed to be very low speed S154, when the encoder position is in the middle-low-medium range, S155 instructs the low speed, and S157 when the encoder position is in the middle-medium-high range. The speed is instructed at S158, and when the speed is medium to high, S159 is instructed at a high speed. After that, the drive control unit 5
8, a pulse is output to the motor via the power saving means (75) S161 and the motor speed determining means (76) S161-1, and the position of the encoder 35 is determined and the number of pulses is counted. It is determined at step S164 that “target pulse−S <(G) + (a3) + N” before the S pulse, and it is determined whether the encoder position E is the designated position when the condition is satisfied.
Is corrected to the standard position on the basis of (S167), the current rotational direction is stored, and the flow returns to S168 (S169). S164 when the condition is satisfied, S when the encoder position E is not the designated position
165, S170 when the pulse number becomes “pulse number + S <(G) + (a3) −N” which is S pulse over the target pulse, and S171 to go to motor error SUB.

When the thermal power change instruction is DOWN, S17
2. If the current position is a weak position, the request is not accepted and S173. If the current position is not a weak position, the target position is set to the current position-1 and S174.
Change the lamp to a position where the thermal power has been reduced by one from the current level and S17.
5. Change the encoder position to the next encoder position E from the current encoder position by one based on FIG. 5, S176, select the number of output pulses of the motor drive as "pulse number = current pulse (G) -P" and S177, rotate direction In the weak direction S17
8. It is determined whether this is the same direction as the previous rotation direction, and S179,
In the case of the same direction, target pulse number = pulse number and S18
0, if not in the same direction, a value obtained by adding the correction value (a3) to the pulse number is set as the target pulse number in S181.

When the encoder position E is in the low-medium-low range, the speed is instructed to be very slow at S183, and when the encoder position E is in the middle-low-medium range, the speed is specified at S184. The speed is instructed at S187, and when the speed is medium to high, S188 is instructed at a high speed. After that, the power saving unit S190 and the motor speed determination unit S191 of the drive control unit.
A pulse is output to the motor through the step S192, the position determination E of the encoder 35 and the number of pulses are counted, and a step S193 is performed.
“Target pulse + S <before S pulse before target pulse number
(G) + (a3) -N ", and S194. If the condition is satisfied, it is determined whether the encoder position E is the designated position.
When the condition is satisfied, the number of pulses is corrected to the standard position based on FIG. 5, S196, the current rotation direction is stored, S197, and the flow returns to the original flow S169. If the encoder position E is not at the designated position when the condition is satisfied, S195, the number of pulses is larger than the number of target pulses by S.
3) When "-N" is reached, S198, motor error SUB
Go to S171.

FIG. 20 shows the contents of the switching of the heating power between the five heating power levels and the linear heating power adjustment. In step S199, it is determined whether the heating power change is the five-stage switching. In the case of the five-stage switching, the contents shown in FIG. The explanation is as described above). If it is not a five-stage switch, that is, if the thermal power change is S200, if the thermal power change is in the UP direction, S201, it is determined whether the current position is the strong position, and S2.
02, return to the original position in the case of the strong position S199, otherwise, change the number of pulses to be moved to the current pulse + X (the value of X is in the range of 2 to 5 and is a value such that the change in the thermal power can be visually recognized for each combustion part) S203), and the rotation direction is instructed in the strong direction (S204). It is determined whether or not this is the same as the previous rotation direction in S205. If the rotation direction is the same, the target pulse number is set to the pulse number.
In step S207, the number of pulses is set as (pulse number + (a3)). Here, (a3) is the content of the number of steps for eliminating the play of the mechanism when the rotation direction is changed by software as described above.

After the number of movable target pulses is determined, next, if the position of the encoder 35 is in the range of low to medium, S208,
The speed is set to a very low speed S209, and the speed is set in a range from medium to low S21.
0, low speed S211; medium to medium high; S212 speed at medium speed S213;
215, and the power saving means (75) S of the drive control unit 58
In step S218, a pulse is output to the motor via the motor 216 and the motor speed determination means (76) S217. Thereafter, the position of the encoder 35 and the number of pulses are detected by the pulse counter, and the number of pulses is detected in step S219. When the target position is reached, step S219-1 is performed. S22 for medium range
2. S223 with the lamp in the middle, S224 in the case of medium to medium high
S225 when the lamp is set to medium high, and S22 when the range is medium to high
6. Instruct S227 to set the lamp to medium-high, S228 to set the lamp to high, and S229 to set the lamp to high, and return to S230 if the thermal power adjustment key is kept pressed, otherwise return to S201. The purpose of the lamp indication is to guarantee the minimum heating power that the lamp in the weak position is turned on only when the heating power becomes low.

When the thermal power is changed in the DOWN direction, S231,
In step S232, it is determined whether the current position is the weak position. If the position is the weak position, the operation is returned to the original position. S199, otherwise, the number of pulses to be moved is changed to the current pulse by -X (the value of X is in the range of 2 to 5; (Set for each appliance with the value of degree)
233, instruct the rotation direction to the weak direction S234, determine whether the rotation direction is the same as the previous time, S235, if the same, the target pulse number = pulse number, and S236; if the rotation direction is different, target pulse number = pulse number + (a3 ), And the number of pulses is set in S237. Here, (a3) is the content of the number of steps for eliminating the play of the mechanism when the rotation direction is changed by software as described above.

Once the number of movable target pulses is determined, next, if the position of the encoder 35 is in the range from low to medium to low, the speed S238 is a low speed S239; if the position is in the range from medium to low, the speed S240 is low; S242 speed to medium speed S24
3. When the speed is in the range of medium speed to high speed, the speed of S244 is increased to S2.
Step S248: outputting a pulse to the motor via the power saving unit S246 and the motor speed determining unit S247 of the drive control unit 58. Thereafter, the position of the encoder 35 and the number of pulses are detected by the pulse counter, and the number of pulses is detected in S249. If the target position is reached, S249-1 is performed. In the case of the range, the S252 lamp is set to medium to low S253, and in the case of medium to medium high, the S254 lamp is set to S255. If the instruction is given and the heating power adjustment key is kept pressed 230, return to S201 S230-
1. If not, restore S230-2.

The purpose of the instruction of the lamp is to guarantee the maximum heating power that the lamp at the high position is turned on only when the heating power becomes high.

For the display of the lamp, for example, the weak position lights up only the weak lamp, the next middle weak position lights only the middle weak position, and the weak lamp and the middle weak position are between the weak and middle weak positions. The method of turning on the lamp and displaying that it is in the middle is effective as the second embodiment.

As described above, the heating power can be easily switched between the step switching and the linear switching, and can be selected for the purpose of cooking.

In particular, when changing to the linear heating power, the heating power is selected in stages up to the rough heating power, and by continuously pushing at that time, the heating power changes to the linear heating power, so that the ease of matching is improved.

Next, the drive judging units 59, 60, 6
1 "motor error SU" of the motor malfunction process
B "will be described. FIG. 21 shows the schematic flow. When a motor error occurs and this routine is entered, the motor speed is increased to S260, the torque is commanded to the maximum, S261, and the rotation direction is made the same as before the error processing, and S262, The target position is also the same as before the error processing, and S26
3. A pulse is output to the motor via the power saving determining means S264 and the motor speed determining means SS265 in the drive control unit 58 in S266. This means that when the motor is not operated at the normal torque, it is operated again at a high torque.

When the rotation direction is strong rotation S267, the pulse is counted by the pulse counter, and "N = N + 1" S26
8. The position of the encoder 35 is detected in step S269, and it is determined whether the encoder 35 is the target position. In step S269, if the position of the encoder 35 is reached, the pulse number is taken over and corrected in FIG.
S271 to return to the original flow. If the target encoder position cannot be found and N has reached the value obtained by adding the predetermined value M from the previous target pulse number, it is determined whether or not "target pulse + M>N". If not, the flow returns to S263.
If it has reached, it is determined that it is the first time S273, and if it is the first time, the rotation direction is reversed in the weak direction S274, the motor speed is increased to S275, the torque is commanded to the maximum S276, and power saving in the drive control unit 58 is performed. A pulse is output to the motor via the judging means S277 and the motor speed judging means SS278 in S279.

The pulses are counted by the pulse counter 2 and "Q = Q + 1" S280, when Q> 10, S28
1. The rotation of the motor is reversed, S282, M = 30, and the process returns to S283 and S263. This means rotating in the opposite direction and removing the obstacle. The same processing is performed according to the flow from S263, and the target encoder position cannot be found. S269, “Target pulse + M (M value is increased)> N” is determined and S272, in which case 1 is set.
It is determined that this is the first time, S273, and since it is the second time, it is determined that the motor has failed, and S284, and the process goes to S285 for failure processing.

If the rotation of the motor is in the weak direction, S26
7. The following contents are changed for the sake of processing, and the portions will be described. The pulse is counted by the previous pulse counter, and “N = N + 1” S268 becomes “N = N−1” and S
286, whether N has reached the value obtained by adding the predetermined value M from the previous number of target pulses or “target pulse + M> N” S272
S287 where “target pulse−M <N” is satisfied. Otherwise, it is the same. These considerations were made to operate the motor at normal torque once without judging that it failed, and if there was still no target position, further back it out to eliminate obstacles and re-adjust to the target position. As a result, when a motor error occurs, it is possible to eliminate insufficient torque and the cause of sticking of grease at the time of initial operation, sticking of the seal part, and wasteful power consumption operating with excessive torque in anticipation of these, In addition, it is possible to resolve the complaint that the operation does not work well frequently.

The above-mentioned change of the heating power is also applied to the automatic cooking mode, and the relationship between the automatic cooking mode and the heating power adjustment will be described below with reference to FIGS. 10 and 22 (a) to 22 (c), 23 and 24.

A description will now be given of the cooking mode selection in the left cooker drive determination section 59 and the automatic discrimination cooking mode in which no mode selection is made. In the case of the left cooking stove 1, there is a case where the cooking mode is designated from the operation panel 5 and a case where the cooking mode is not designated.
23 (a), (b) and (c) and FIG.
As shown in FIG. 4, two processing procedures are executed.

When the cooking mode is not designated from the operation panel 5 and the ignition operation of the left cooking stove 1 is performed, the operation shown in FIG.
The processing shown in (a), (b) and (c) is executed.

In FIG. 22 (a), the temperature judging section 82 takes out the temperature detected by the pan bottom temperature sensor 2 and proceeds to step S28.
8. This temperature data is subjected to arithmetic processing and S289, and the arithmetic result is input to the cooking mode determining unit 83. The cooking mode determination unit 83 determines whether or not it is water cooking based on the calculation result, and proceeds to S
290, in the case of water cooking, after determining the non-sticking temperature from the boiling temperature in S291, the process proceeds to the non-sticking determination unit 84 in S292.

If it is determined in step S290 that the cooking is not water-based cooking, the cooking is determined to be oil-based cooking and S
293. Thereafter, after the overheating prevention temperature of the oil cooking is determined in order to monitor the overheating of the oil cooking, the processing is shifted to the overheating prevention determination section 85 after the overheating prevention temperature of the oil cooking is determined S295 (S295).

Next, the processing operation of each unit to which the processing has been shifted from the cooking mode determination unit 83 will be described.

FIG. 22B shows the processing procedure of the non-sticking determination section 84 to which the processing has been shifted from step S292 of the processing procedure of the cooking mode determination section 83. A condition determination of “sensor temperature> non-sticking temperature−15 ° C.” is performed for the sensor temperature detected by the pan bottom temperature sensor 2 in S296, and it is determined whether this condition is satisfied for the first time in S297. When this is the first time, a buzzer etc. will be notified, and when it is not the first time, it will be a state where it will burn, but it is considered that it will take a little time,
In step S299, a command signal for setting the left-hand gas control unit 29 to the weak position is output to the left-hand drive determination unit 59. The left cooker drive judging section 59 controls the flow control mechanism 3 by the motor 34.
3 is controlled so that the gas flow rate becomes the weak position to weaken the combustion thermal power.

Next, the scoring timer is turned on and S
300, it is determined whether X seconds have elapsed or not and S30
After a lapse of 1, X seconds, a condition determination of “sensor temperature> non-sticking temperature” is performed. S302. If the condition is satisfied, it is possible to determine that there is a sticking.
9 to close the left-hand gas control unit 29 (OF
F) Step S303.

If the condition of "sensor temperature> non-sticking temperature" is not satisfied by the determination processing in step S302, the temperature is not higher than the non-sticking temperature.
The condition of “non-sticking temperature −5 ° C.” is determined and S304 is performed.
If the condition is satisfied, a command to set the gas control unit 33 to the medium heating power position is output to the left-hand drive determination unit 59, and S30 is executed.
5. Return to step S296 together with the case where the condition determination in step S304 is not satisfied.

By the processing operation of the non-sticking determination section 84, the processing of preventing non-sticking in water cooking (simmering) based on the detection of the pan bottom temperature by the pan bottom temperature sensor 2 is performed, and the user moves away from the gas cooker. If it is, a process of stopping the combustion of the left stove 1 is performed before scorching occurs.

[0130] The overheating prevention judging section 8 to which the processing is shifted from the step S295 of the processing procedure of the cooking mode judging section 83.
The processing procedure of No. 5 is shown in FIG.

"Sensor temperature> overheat prevention temperature -10 ° C"
S306 is performed. If this condition determination is satisfied, it is determined whether this is the first time, and S307 is performed.
If it is the first time, a buzzer or the like informs the user S308, and the left hand drive determination unit 59 outputs a command to the gas control unit 29 to perform drive control to the weak position S309. Previous step S307
If it is not the first time in the determination of, the process proceeds to step S309 without notifying the buzzer. Next, a condition determination of “sensor temperature> overheating prevention temperature” is performed, and S31
If the condition is satisfied, the condition is satisfied, and it is in an overheated state. Therefore, a command to close the gas flow control unit 33 is output to the left-hand heating determining unit 59, and the process ends (S311).

If the condition determination in step S310 is not satisfied, a condition determination of "sensor temperature <overheat prevention temperature-18 ° C." is made in step S312. Part 2
Then, a command to control No. 9 to the high heating power position is output, and the process returns to S313 and step S306. If the condition is not satisfied, a condition determination of “sensor temperature <overheating prevention temperature−5 ° C.” is made, and the gas controller 2 is sent to the left-hand-roller-drive determiner 59 in S314.
Then, a command to control No. 9 to the medium heat power position is output, and the process returns to S315 and step S306.

As described above, if the tempura is fried and the user leaves the place, abnormal heating of the tempura oil can be prevented and the danger of fire can be avoided.

Hereinafter, the case where the cooking mode is set will be described with reference to FIGS. S2 when the cooking mode key is input with the cooking mode setting key and there is no previous one
Through steps S88 to S295, the cooking mode determination unit sets the cooking mode based on the temperature of the pans detected by the pan bottom temperature sensor 2 and the cooking mode designation input from the operation panel 5, and performs water cooking. In the case of cooking, the non-sticking determination unit 84 is used.
In the case of water heater, the water heater determination unit 87 is operated. The temperature adjustment in each set cooking mode is performed by operating the temperature adjustment determination unit 86 to perform the temperature management.

FIG. 23 shows the processing procedure of the temperature adjustment determining section 86 in the tempura mode to which the processing has been shifted from step S48 of the processing procedure of the cooking mode determining section 83. First, a condition determination of “sensor temperature> set temperature” is performed in S31.
6. If this condition determination is satisfied, it is determined whether or not this is the first time, and if it is the first time, notification is made by a buzzer or the like S318. Subsequently, a condition determination of “sensor temperature> set temperature + 10 ° C.” is performed together with the first time (S319). When this condition is satisfied, a command to drive the gas control unit 29 to the weak position is output to the left-hand drive determination unit 34, and S320 and step S3 are performed.
The process returns to step 16. Conversely, when the condition is not satisfied,
If the condition is determined that “sensor temperature> set temperature + 5 ° C.” in S321, and the condition is satisfied, a command to drive and control the gas control unit 29 to the middle heating power position is output to the left-hand drive determination unit 59, and S322 is performed. The process returns to S316.

When the condition is not satisfied in the process of the previous step S316, if "sensor temperature <
When the condition is determined to be “set temperature−10 ° C.” and the condition is satisfied, a command to drive and control the gas control unit 29 to the strong position is output to the left-hand drive determining unit 59 and S32 is performed.
4. If the condition is not satisfied, a condition determination of “sensor temperature <set temperature−5 ° C.” is made S325, and if the condition is satisfied, the left-hand drive determination unit 59 drives the gas control unit 29 to the medium heating power position. Output a command to control and S3
26, the process returns to step S316.

According to the above-mentioned contents, it is possible to provide an appliance capable of controlling a set oil temperature to produce a delicious fried food with temperature control suitable for frying a tempura.

Boiler judging section 87 to which the processing has been shifted from step S48 of the processing procedure of cooking mode judging section 83.
24 is shown in FIG. The temperature data is obtained from the temperature determination unit 82 and S327, and the arithmetic processing is performed on the data and S32
8. It is determined from the result of this calculation whether or not the state in which the temperature rise compared with the temperature 60 seconds before was within 2 ° C. twice twice in succession is S329. Since the temperature rise is small when the water temperature reaches the boiling point, it is determined that the water is boiling when the determination is satisfied.
In S330, a command to drive and control the gas control unit 29 to the weak position is output. S330, the timer is turned ON, S331 clocking is started, 5 minutes are counted, and S332 is performed to automatically extinguish the fire when 5 minutes have elapsed. The gas control unit 29 is operated to close the cap, and S333 is completed.

According to the above-mentioned contents, it is possible to provide a convenient water heating function of boiling the water and automatically setting the heat to a low heat, burning for 5 minutes, removing the desalting and automatically extinguishing the fire.

As described above, in the case of the left-hand heater 1, the combustion of the left-hand heater 1 in each processing procedure starting from the cooking mode determination unit 83 is automatically controlled by the left-hand drive determination unit 59.

Next, the power saving determination means 75 and the motor speed control means 76 will be described. FIG. 25 (a) shows a general characteristic diagram of the stepping motor 34, in which the vertical axis shows torque and current, the horizontal axis shows the pulse frequency for driving the motor, and the curves show 1.5V and 3.0V, respectively. It shows torque and current consumption. Assuming that the torque required to drive the mechanism of the gas control unit 29 is 50 g-cm, the current consumption is 120 Hz at 1.5 V, 410 mA, and 3.0.
At V, when driven at 400 Hz, the current consumption of 52.4 g-cm is 554 mA. (However, the limit that cannot be used at frequencies higher than this is determined by the motor in the frequency characteristics of the motor.) Table 1 below shows detailed numerical values.

[0142]

[Table 1]

Further, the lower the frequency at which the torque becomes maximum is, the higher the torque becomes. At 1.5 V, there is a difference of 72.5 / 50.9 = 1.42 times between 20 Hz and 120 Hz. How to handle it is an important issue from current consumption and torque characteristics. In addition, the current value also changes in proportion to this. Particularly in a configuration using a battery as a power supply, the battery runs out immediately unless the current consumption is reduced, and marketability cannot be secured.

FIG. 25B is a graph showing the relationship between the frequency and the torque of 1.5 V to 3 V. The vertical axis represents the torque, and the horizontal axis represents the frequency. Things. In order to obtain a torque of 50 g-cm, 1.5
120PPS at V, 200PPS at 2.5V, 2.5V
It can be understood that at 300 V, it is 400 PPS at 3.0 V. Therefore, in order to obtain the same torque, the frequency may be changed according to the voltage. Table 2 below shows detailed numerical values.

[0145]

[Table 2]

Next, an example for saving power and controlling torque of the battery will be described. FIG. 26 (a) shows a means for using a voltage of 3V to 1.5V with a constant torque. It is determined whether the motor is in use and S334.
7, the voltage is determined to be XV by the voltage determination means 81, and S33
5. In order to calculate an appropriate motor pulse frequency that secures a torque corresponding to the voltage, a frequency corresponding to the voltage is obtained by the linear approximation obtained from FIG. "Y = 188X-16
8 "S336, and thereafter, the microcomputer calculates the determined frequency and S337, and outputs a pulse to the motor S338. Here, Y indicates the output frequency, and X indicates the motor applied voltage.

However, the means for changing the output frequency linearly requires a separate frequency converter, and if it is not cost-effective to use it for gas cooking appliances, the clock frequency of the microcomputer is not used without using the frequency converter. The replacement stage frequency control method is preferable, and the schematic flow of this method is shown in FIG.
This is shown in FIG.

In FIG. 26 (b), it is determined whether the motor is in use by means of using a constant torque of 3V to 1.5V, and in step S339, the battery voltage is detected by the voltage detection means 57 when the motor is in use. The voltage judgment means 81 judges XV and S
340. In order to calculate an appropriate motor pulse frequency that secures a torque corresponding to the voltage, a frequency corresponding to the voltage is obtained by a linear approximation obtained from FIG. "Y1 = 188X
-168 "S341, if the calculation result is Y1 <140, S342; Y is 120, S342-1; if Y1 <180, S343, Y is 160, S343-1, Y1 <2.
In the case of 20, S344 and Y are set to 200 and S344-1, Y
If 1 <260, S345, Y to 240, and S345-
1, if Y1 <300, S346, Y to 280, S3
46-1, if Y1 <340, S347, Y is 320
S347-1, if Y1 <380, S348; Y to 360, S348-1;
S349, set the specified frequency with the microcomputer, and
349-1, S350 for pulse output to the motor.

As described above, the operation can be performed by dividing the frequency of the clock pulse of the microcomputer, so that the driving mechanism can be finished with a simple circuit, low cost, and power saving of a constant torque.

The following shows an example of power saving, and shows a means for making the frequency constant and changing the voltage by changing the duty. In the motor characteristic diagram shown in FIG. 25, the required torque required at 1.5 V is shown. 50g-cm and required frequency is 12
The frequency becomes 0 Hz, and the frequency becomes 400 Hz when the voltage is 3 V.

To make the frequency constant, 1.5V of 120
When the PPS is fixed and the voltage is 3 V, the required torque can be secured by supplying power only for 1/3 of the voltage. That is, the duty is set to 30%. The feature of this method is that the speed is constant irrespective of the battery voltage, that is, the thermal power control can be controlled at a constant speed regardless of the new or old type of battery, and power saving can be measured.

FIG. 27 shows the outline of the operation.
It shows the pulse output at the time of V, the duty is 100%,
The fundamental frequency is 120 PPS. Accordingly, electric power required to output a necessary torque at 1.5 V is supplied.

(B) shows a pulse output at the time of 3.0 V, where the duty is 30% and the fundamental frequency is 120 PPS. Supply time is reduced to 1/3 because voltage is twice as high as 1.5V
Therefore, the amount of supplied power is almost the same as at 1.5 V.

(C) shows the pulse output at 2.5 V, the duty is 40%, and the fundamental frequency is 120 PPS. Since the voltage is 1.67 times that at the time of 1.5 V, the supply time is set to 40%.

FIG. 28 (a) shows a schematic flow of the operation. In step S351, it is determined whether the motor is in use. When the motor is in use, the voltage is detected by the voltage detecting means 57 and the voltage determining means 81 is used.
Is obtained in step S352, and based on the voltage, Y1 = 18
8X-168 (Y1 is the frequency, X is the voltage at the current time), and then the duty ratio is calculated, and Y = 1 / Y1 / 1
/ YL is calculated (Y is the duty ratio, YL is the fundamental frequency (120 PPS)), and Y is determined in S354. S355 for outputting to the motor with the determined duty pulse.

The drawback of the above method is that the duty ratio is proportional to the voltage in the microcomputer software processing of the duty control, so that the software processing of the microcomputer becomes complicated, and there are many interruption processes, which may cause a malfunction. FIG. 28B shows a means for resolving this. FIG. 28 (b)
The method will be described in a schematic flow in which the duty ratio is divided into large steps in advance and a pulse is output at any one of the duties. If the motor is in use, it is determined whether the motor is in use and the voltage is detected by the voltage detection means 57 when the motor is in use. Switching voltage determination means 8
S357 is obtained based on the voltage X1, and Y1 = 18 based on the voltage.
8X-168 (Y1 is the frequency, X is the voltage at the current time), and then the duty ratio is calculated, and Y = 1 / Y1 / 1
/ YL is calculated, and S358 (Y is the duty ratio, YL is the fundamental frequency (120 PPS)), and the pulse with the determined duty is S359 if Y1 <30, and S3 is changed to Y = 30.
59-1, if Y1 <40, S360, Y = 40 and S3
60-1, if Y1 <50, S361, Y = 50 and S3
61-1, if Y1 <60, S362, Y = 60 and S3
62-1, if Y1 <70, S353, Y = 70 and S3
63-1, if Y1 <80, S364, Y = 80 and S3
64-1, if Y1 <90, S365, Y = 90 and S3
66, if Y1> 90, S365, Y = 100, S36
7. Then, a duty ratio is selected and S368, and a pulse is output to the motor in S369.

This is in consideration of reducing malfunction by synchronizing with the frequency-divided clock pulse of the microcomputer.

Although the above description has been made with respect to power saving and constant speed control, a method for high torque output for temporarily applying high torque in an abnormal process when the flow control unit does not operate due to an abnormality to avoid the abnormality is described. This will be described below. Gas control unit 2
As described above, the mechanisms 9, 30, and 31 perform gas sealing with the O-ring on the movable shaft. In particular, in the early stage of operation, the O-ring bites and the situation becomes larger as the temperature becomes lower. In addition, there is also a factor that the operation may temporarily become heavy due to the influence of dust and dirt on the slide closing member 33-3 of the movable part.

For this reason, the motor is normally operated at a torque obtained by adding a safety factor to the required torque. However, the motor is operated at an unnecessary torque in a normal use state. Unnecessary battery drain is occurring. The present invention provides a means for operating at an appropriate torque by classifying the normal use and the first use.

The power saving judging means shown in FIG. 29 judges whether the motor drive instruction is the first time or not at step S370. In the case of the first time, the motor drive frequency is instructed to the maximum torque frequency at S371. In S373, it is determined whether or not N is equal to or more than K, and when it is equal to or more than N, the first signal is released in S374. In the following cases, a pulse output is output to the motor at the highest torque frequency S375. If it is not the first time, it is determined in S370. If it is not the first time, S376 is performed at a normal frequency.
5.

As described above, power saving can be achieved, and a failure can be avoided. The reason why the predetermined number of K outputs are required is that the feature of the present invention is that if the number of pulses that covers the backlash of the mechanism is not ensured, the intended purpose cannot be achieved and there is no effect.

Further, the description has been made by limiting the torque to the initial torque. However, by performing this processing even at the time of abnormality, power saving can be achieved.

As a second embodiment, although not shown, the motor is always operated at the highest torque frequency, and the duty ratio is
While there are ways to achieve the above goals,
When the heating power adjustment speed is low, it is necessary to determine the heating power adjustment speed first and determine a speed suitable for cooking.

Next, a method for controlling the heating power adjustment speed will be described. The adjustment of the heating power of the gas cooker is necessary from the following contents. For example, according to the relationship between the encoder position and the ignition position shown in FIG. 5, when the ignition is performed, the ignition state is changed from the closed state to the medium-high state, which is the ignition position, through low, medium-low, and medium. At this position, the spark plug 22 is discharged and ignited. However, when the gas flow rate and the discharge timing are set at a position where the gas flow rate is weak, the flashback which burns inside the burner is caused by a lean gas atmosphere. appear. Therefore, it is fired at a medium-high position where flashback does not occur. In this connection, if the speed of moving to the middle strong position is low, the gas is filled and explosion ignition occurs, causing anxiety. It is a prerequisite to go to the ignition position earlier at the time of ignition. Further, when the combustion is changed from the strong combustion to the weak combustion, for example, it is likely to be spilled. However, if the thermal power changes too quickly, a backfire phenomenon occurs and the fire extinguishes.
If the operation is performed so as to reduce the speed just before the weakness in order to eliminate the fire extinguishing phenomenon, red fire combustion occurs due to a transient shortage of air, and a user complains.

When the thermal power adjustment is linearly adjusted,
Finer adjustment of the heating power is required as the heating power is reduced according to the cooking content, and the lower the adjustment speed of the heating power, the easier the adjustment.
As described above, the demand for the thermal power adjustment speed varies depending on the purpose, and has a content that cannot be satisfied at a constant speed.

FIG. 30 shows an example of the speed adjusting method. From the characteristic diagram of the motor shown in FIG. 25, the low speed, the low speed, the medium speed, and the high speed are assigned to the frequency.
z, low speed 100Hz, medium speed 130Hz, high speed 160Hz
By outputting the frequency according to the speed instruction, the speed can be controlled.

In step S377, it is determined whether the speed instruction is very low. If the speed is low, the frequency is set to 80 Hz. In step S381, if the speed is low, step S3 is performed.
S382 with 78 frequency set to 100Hz, S3 for medium speed
79: The frequency is set to 130 Hz, and S383.
The speed can be adjusted by setting the frequency to 160 Hz and changing the frequency to 160 Hz in S384 and outputting a pulse to the motor in S385.

In FIG. 30, the description has been given of the case where the speed adjustment is changed by the frequency. However, hereinafter, the frequency is fixed and the speed is controlled by the intermittent power supply of the frequency. The frequency conversion method is practical when a home power supply is used.However, in the case of a battery power supply, there is a possibility that the voltage change may be overridden. It is difficult to expect perfect speed control. Performing speed control while keeping the frequency constant is an excellent control method to compensate for the disadvantage. The general method will be described below.

In FIG. 31, A is a high speed when a pulse is output at a constant frequency, and is 100% speed, B is a middle speed when one third of the frequency is lost, and 67% speed,
Is a low speed when the half of the frequency is lost and 50% speed, and D is a low speed when the half of the frequency is lost.
It controls the speed of 3%. The advantage of this method is that the torque can be kept constant, and there is little fluctuation in the speed and the designated speed. The schematic flow will be described below.

In FIG. 32, motor speed control means 7
In step S386, it is determined whether there is a driving instruction. In step S387, it is determined whether the content of the instruction from the preceding stage is high speed. In the case of high speed, all pulses of the frequency are output in step S389.
repeat. If the speed is not high, S387;
90, in the case of medium speed, the pulse is counted by the counter and S3
91, if the counter is not 3 (1 or 2)
In S392, a pulse is output to the motor, and in S394, S386 is repeated until a stop instruction is issued. Otherwise, when the counter is 3, S392, the counter is initialized and S393, and S391 is started again. If it is not medium speed, S390, it is determined whether it is low speed, S395. If it is low speed, the pulse is counted by the counter. S396, if the counter is not 2 (when it is 1).
In step S397, a pulse is output to the motor, and the processing in step S399 is repeated until a stop instruction is issued. When the counter is 2, S397 initializes the counter, S398, and counts S396 again. If the speed is not low, S395, it is determined that the speed is very slow, S400. In that case, the pulse is counted by a counter in S401. If the counter is 3, S402, the counter is initialized, S403, and the pulse is output to the motor, S404.
It repeats to S386 until there is a stop instruction. When the counter is 1 or 2, S402, and count again S4.
01. According to the above-mentioned contents, the speed control of the heating power control suitable for the cooking utensil can be performed.

FIGS. 33 and 34 show the connection between the motor speed control means 76 and the power saving determining means 75. FIG. 33 shows a schematic flow of the power saving determining means 75.

It is determined whether there is a motor driving instruction and S40.
5. If there is a driving instruction, the voltage is detected by the voltage detecting means 57 and the voltage X is obtained by the voltage judging means 81 in S406. It is determined whether the content of the driving instruction is high torque or not in S407. In step S408, otherwise, a high torque frequency is specified in step S409. In either case, Y1 = 188X-168 based on the voltage.
(Y1 is the frequency, X is the current voltage), then the duty ratio is calculated, Y = 1 / Y1 / 1 / YL is calculated, and S410 (Y is the duty ratio, YL is the fundamental frequency (1
20PPS)), and the determined duty pulse is Y
If 1 <30, S411, Y = 30 and S411-1, Y
If 1 <40, S412, Y = 40 and S412-1, Y
If 1 <50, S413, Y = 50 and S413-1, Y
If 1 <60, S414, Y = 60 and S414-1, Y
If 1 <70, S415, Y = 70 and S415-1, Y
If 1 <80, S416, Y = 80 and S416-1, Y
If 1 <90, S417, Y = 90 and S417-1, Y
If 1> 90, the process goes to S417, Y = 100 to S418, and the duty ratio is selected and passed to S419, which is passed to the motor speed determination means of the next stage.

FIG. 34 shows a schematic flow of the motor speed control means 76. The contents are the same as those in FIG. 32 and are omitted. As described above, even when the battery voltage drops, for example, in the range of 1.5 to 3.0 V, the battery voltage is not affected by the battery voltage, and the battery is selected with the specified constant torque. It is intended to be able to be used without a change in speed and to be able to control the driving of a gas cooking appliance which realizes power saving.

In addition to the above, combinations other than those described above can be easily made for speed control and power saving. For example, when using a home power supply with little voltage fluctuation, optimization conditions should be set. , It is possible to produce the most suitable configuration.

The embodiments of the present invention have been described above. However, the present invention is not limited to the embodiments, and may be of any type that achieves the object of the present invention. Things.

[0176]

As is clear from the above description, according to the present invention, at the first time, power is supplied by increasing the supply power in order to increase the torque of the motor. , And can be reliably operated at a high torque for the first time, and a highly reliable product can be provided.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an appearance of a gas cooker using a gas flow control device according to an embodiment of the present invention. FIG. 1B is a front view of the operation unit.

FIG. 2 is an overall configuration diagram of the gas flow control device.

3A is a plan view of the gas control block, and FIG. 3B is a sectional side view of the same.

4A is a plan view of the encoder, FIG. 4B is a front view of the encoder, and FIG.

FIGS. 5A to 5F are correlation diagrams of the pattern of the encoder and the thermal power.

FIGS. 6A and 6B are correlation diagrams of the pattern of the encoder and the thermal power.

FIGS. 7A and 7B are correlation diagrams of the pattern of the encoder and the thermal power.

8 (a) and 8 (b) are correlation diagrams of the pattern of the encoder and the thermal power.

9 (a) and 9 (b) are explanatory views showing the looseness of the flow control mechanism of the gas control unit.

FIG. 10 is a block diagram of the control unit.

FIG. 11 is a schematic flowchart of the ignition / extinguishing operation.

FIG. 12 is a schematic flowchart of the key input determination means.

FIG. 13 is a schematic flowchart of the key input determination means.

FIG. 14 is a schematic flowchart of various cooking mode key input determination means for the left cooking stove;

FIG. 15 is a schematic flowchart of the demonstration mode key input determination means.

FIG. 16 is a schematic flowchart of the overall operation determining means.

FIG. 17 is a schematic flowchart of the heating device determining means;

FIG. 18 is a schematic flowchart of the error detection processing means.

FIG. 19 is a schematic flowchart of the thermal power change determination means.

FIG. 20 is a schematic flowchart of the thermal power change determination means.

FIG. 21 is a schematic flowchart of the motor malfunction processing means;

FIGS. 22A, 22B, and 22C are schematic flowcharts of the automatic determination cooking mode.

FIG. 23 is a schematic flowchart of the automatic determination cooking mode.

FIG. 24 is a schematic flowchart of the automatic determination cooking mode.

25A and 25B are characteristic diagrams of the stepping motor.

26A and 26B are schematic flowcharts of the power saving and torque control.

FIGS. 27A, 27B, and 27C are explanatory diagrams of the power saving and torque control.

FIGS. 28A and 28B are explanatory diagrams of the power saving and torque control.

FIG. 29 is a schematic flowchart of the speed control.

FIG. 30 is a schematic flowchart of the speed control.

31A to 31D are explanatory diagrams of the speed control.

FIG. 32 is a schematic flowchart of the speed control.

FIG. 33 is a schematic flowchart of the speed control.

FIG. 34 is a schematic flowchart of the speed control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Left stove 2 Pan bottom temperature sensor 3 Right stove 4 Grill 5 Operation part 6 Left stove ignition / extinguishing key 7 Right stove ignition / extinguishing key 8 Grill ignition / extinguishing key 9 Left stove heating power adjustment key DESCRIPTION OF SYMBOLS 10 Heating key for left stove 11 Heating key for right stove 12 Heating key for right stove 13 Heating key for grill 14 Heating key for grill 15 Heat emitting indicator for left stove 16 Right stove Thermal light indicator 17 Grill light indicator 19 Child lock switch 20 Battery compartment 21 Thermocouple 22 Ignition plug 23 Left burner 24 Control circuit 25 Gas control block 26 Hose end 27 Former solenoid valve 27-1 Lead wire 28 Governor 29 Left cooking gas control unit 30 Right cooking gas control unit 31 Grill gas control unit 32 Nozzle 33 Flow control unit 3 -1 Cock body 33-2 Flow control plate 33-3 Slide closure 33-4 Gas outlet 33-5 Spring 33-6 Drive connection shaft 33-7 O-ring 34 Stepping motor 34-1 Drive connection portion 34-2 Pin 34- 3 Lead Wire 35 Encoder 35-1 Board 35-2 Outer Body 35-3 Sliding Body 35-4 Lead Wire 35-5 Current Collector 36 Right Hand Burner 37 Grill Burner 38 Spark Plug 39 Cooking Mode Setting Key 40 Cooking Mode Setting Key 41 Cooking mode setting key 42 Cooking mode indicator lamp 43 Cooking mode indicator lamp 44 Cooking mode indicator lamp 49 Screw part 50 Female screw 51 Battery 52 Constant voltage control means 53 Motor tool for left cooking stove 54 Motor IC for right cooking stove 55 Motor for grill IC 56 Solenoid valve output 57 Voltage detection means 58 Drive Control unit 59 Left cooker drive determination unit 60 Right cooker drive determination unit 61 Grill drive determination unit 62 Inspection mode input / output terminal 63 Ventilation interlocking terminal 64 General operation means 65 Operation and display block 66 Operation and display block left stove 67 Right cooker of operation and display block 68 Grille of operation and display block 69 Left hot key input & display 70 Right hot key input & display 71 Grill input key & display 72 Key input determination means 73 Display output stage 74 Failure display Determination means 75 power saving determination means 76 motor speed control means 77 inspection mode determination means 78 demonstration mode determination means 79 failure determination means 80 ventilation interlocking determination means 81 voltage determination means 82 temperature determination section 83 cooking mode determination section 84 non-stick prevention determination section 85 Overheat prevention determination unit 86 Temperature adjustment determination unit 87 Water heater determination unit 88 Ignition output 89 Motor error SUB

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuyoshi Hatano 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Terms (reference) 3K068 FB02 FB15 FC02 FC06 FD04 HA08 NA04

Claims (3)

[Claims] 1. A drive control unit comprising: a flow control unit for controlling a flow rate of a gas; a drive unit using a stepping motor for driving the flow control unit; and a drive control unit for controlling the drive of the drive unit. Is a gas flow control device configured to measure the number of times of driving of the driving unit and, when this is the first time, to supply electric power with increased supply power in order to increase the torque of the driving unit. 2. A drive control unit comprising: a flow control unit for controlling a flow rate of gas; a drive unit using a stepping motor for driving the flow control unit; and a drive control unit for controlling the drive of the drive unit. Is a gas flow control device configured to measure the number of times of driving of the drive unit and, when this is the first time, to increase the torque of the drive unit and to supply power by increasing the duty ratio and supplying power. 3. A drive control unit for controlling a flow rate of a gas, a drive unit using a stepping motor for driving the flow control unit, and a drive control unit for driving and controlling the drive unit. Is a gas flow control device configured to measure the number of times of driving of the driving unit, and when this is the first time, to increase the torque of the driving unit, to reduce the frequency and supply electric power with increased supply power.