JP2001263670A - Gas cooking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a stop at an early timing of a cooking overheating preventing device, in a gas cooking apparatus. SOLUTION: The gas cooking apparatus comprises a burner to heat a pan, a temperature sensor 2 for detecting the temperature of a multistage heating power control means to control a burner and the temperature of a pan, and a cooking oil overheating preventing means 85. A cooking oil overheating preventing temperature is set at each heating power. Since an overheating preventing temperature is increased to a high temperature by throttling the heating power, a stop at an early timing is prevented from occurring and the temperature of a frying pan is maintained at a higher temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cooker equipped with a cooking oil overheat prevention device and a non-sticking device having a temperature sensor for measuring a pot bottom temperature at the center of a stove burner. It is related to the technology for reducing the number of times.

[0002]

2. Description of the Related Art Conventionally, a gas cooker having this kind of function has a structure in which a gas flow control means is only a fire extinguishing operation, or has a solenoid valve for the weakest heating power for temperature control of a tempura. Japanese Patent Application Laid-Open No. 63-153328 discloses a method of burning strongly in a high temperature range higher than the temperature at which the tempura is used to prevent breakage. Even if the mode is switched to combustion, the temperature may reach the overheating prevention temperature and the fire may be extinguished automatically.

[0003] In addition, even when high temperature is required for cooking (derived from the sensory experience of the user), if the control temperature is low, it is difficult to use.

[0004]

In the above-mentioned conventional gas flow control, automatic control is only a fire extinguishing operation or only a weak combustion. Therefore, it is necessary to ensure safety under the worst conditions. Even if there is no need to extinguish the fire, there is a drawback in that the fire is extinguished on the assumption of a strong heating power. For example, even if there is a person in the vicinity of the cooker, safety must be ensured within the range of extinguishing the fire without permission.

The present invention has been made to solve the above-mentioned problem, and since the heating power can be automatically controlled in multiple stages, the overheating prevention temperature for each heating power is individually determined, thereby making the overheating prevention temperature as high as possible. This is to reduce premature cutting. The object of the present invention is to eliminate the inconvenience of using the temperature sensor that can be turned off and to improve the convenience.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a structure in which a gas flow rate can be automatically controlled in multiple stages, and a flow rate control means for controlling a gas flow rate; An electric driving means, a driving control means for driving and controlling the electric driving means, and an operating means for giving an instruction to the driving control means, and a new overheating prevention temperature is provided for each heating power in light of an overheating prevention standard, For example, at the time of the maximum thermal power, the overheat prevention temperature is low, and for the intermediate thermal power, the overheat prevention temperature is matched with the intermediate temperature to obtain the overheat prevention temperature of each thermal power, and at a temperature lower than the overheat prevention temperature by a predetermined temperature, the next thermal power or It is configured to switch to a lower heating power so as to prevent premature cutting and perform high-temperature cooking such as frying at a high temperature.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A gas cooker according to the present invention can be implemented by the constitutions described in the respective claims.

That is, in the gas cooking device according to the first aspect, in the configuration in which the fire is automatically extinguished when the temperature of the temperature sensor reaches a predetermined overheating prevention temperature, the first heating suppression temperature and the second heating suppression temperature are reduced in order to reduce the automatic fire extinguishing. The heating suppression temperature is provided, and the first heating suppression temperature is configured to operate only for the first time, so that the first time the low temperature is set to a low temperature due to the function of the suppression temperature dedicated to the first overshoot, Control can be performed at a high temperature after the second cooking.

In the gas cooker according to the present invention, when the temperature of the temperature sensor reaches the first suppression temperature and does not reach the second suppression temperature within a predetermined time, the first forcible force is forced.
By adopting a configuration in which the heating suppression temperature is eliminated, it is possible to satisfy the user's request (cannot cook if the low heat continues, want to quickly increase the heat) by reducing the time of the low heat.

According to a third aspect of the present invention, in the gas cooker, when the temperature of the temperature sensor reaches a predetermined overheating prevention temperature, the automatic fire extinguishing is reduced in order to reduce the automatic fire extinguishing.
Since a heating suppression temperature lower than the overheating prevention temperature is provided, and the overheating prevention temperature is switched to the overheating prevention temperature according to the controlled heating power, the intermediate heating power such as 277 ° C. for the upper limit temperature at which strong heating does not occur, for example, 277 ° C. 700kcal
At / h, the sensor does not ignite even if the alarm is issued, so the sensor temperature can be raised to the overheat prevention temperature to the heat-resistant temperature, so that an effect that a high temperature can be obtained and the fire is not automatically inadvertently extinguished can be obtained.

According to a fourth aspect of the present invention, in the gas cooker, the temperature of the heating suppression temperature is set such that the temperature of the temperature sensor is set to a minimum value when the combustion is performed with the maximum heating power to the heating suppression temperature in a container having a large overshoot. By setting so as not to exceed the overheating prevention temperature, the fire was automatically extinguished at the overheating prevention temperature of the maximum heating power.However, in the present invention, when the heating suppression temperature is reached, the heating power is weakened, but the heating power is weakened. If the heating suppression temperature is set appropriately so that the temperature does not exceed the standard temperature due to overshoot when burning, the fire can be obtained without the automatic fire extinguishing and the high temperature can be obtained as compared with the conventional one, and the effect of providing equipment that complies with the standard can be obtained. is there.

[0012]

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 operation unit 5 has an ignition / extinguishing key 6 for the left hand and an ignition / extinguishing key 7 for the right hand as operating means for individually operating each of the combustion units. Ignition for grills /
Fire extinguishing key 8, left and right heating power adjustment keys 9 and 10, right and left heating power adjustment keys 11 and 12, grilling power adjustment keys 13 and 14, left and right heating power indicator 15, right and left heating Fire power display illuminant 16, fire power display illuminant 1 for grill
7. Each setting key (cooking mode setting means) 39, 40 for inputting the setting of the cooking mode of the left cooker, each display lamp 42, 43 for displaying the setting thereof, a key 41 for setting the grill timer and its display lamp 44, and a child lock switch 19 for prohibiting ignition operation.
In addition, a battery storage unit 20 for storing a battery for control is provided near the operation unit.

As shown in FIG. 2, the left cooking stove 1 has 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) serving as an electric driving unit for driving the flow control unit 33, and the flow control unit 33. And an encoder 35 serving as a position detecting means for detecting the position of.

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.

A temperature detected by the pan bottom temperature sensor 2 and a temperature detected by the thermocouple 21 are input to the control circuit 24, and the left cooking gas control is performed based on the input data and the setting input from the operation panel 5. 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
When the ignition / extinguishing key 7 for the right stove is turned on after confirming that the right 9 is turned off, the control circuit 24 is turned on, and the right stove gas control unit 30 is controlled by the control circuit 24.
Is moved to the ignition flow position, the main electromagnetic valve 27 is opened, and the right 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 rate 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 is provided with 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 of 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 by a spring 33-5 together with a slide closing member 33-3 by 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 connected to a lead 35-1 (FIG. 4).
(See (a), (b), and (c)), and the original solenoid valve 27 is connected to the lead wire 2.
7-1, the motor 34 is connected to the control circuit 24 via the lead wire 34-2.

As shown in FIG. 6, the motor 34 has a threaded portion 49 on the shaft portion and a female screw 50 fitted to the threaded portion 49.
3-6 is fixed to form the drive connection portion 34-1.
Therefore, when one driving pulse is transmitted to the stepping motor 34, the stepping motor 34 rotates by one pole, the screw portion 49 also rotates by that amount, and the female screw 50 moves by that amount. As an example for reference, if the number of poles of the motor is 24 and the lead of the screw is 2 mm, one pulse moves 2/24 = 0.08 mm.

Therefore, when the stepping motor 34 is rotated, linear movement is performed in the drive connecting portion 34-1 to move the drive connecting shaft 33-6, and the slide closing member fitted to the tip of the drive 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,
Because of the method of driving the motor, the motor does not normally operate, power can be saved, and it is compatible with the battery power supply.

However, even if the needle system is used, the contents described below can be implemented, and the present invention is not limited to being applicable only to the slide closure.

FIGS. 4A to 4C show encoders 35.
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 encoders 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 in which the gas is shut off (the gas does not flow because the through hole 33a of the slide closure 33-3 does not cover the hole 33b of the flow control plate 33-2).

In consideration of safety, in this state, it is possible to detect whether the lead wire is disconnected or short-circuited in any case where only the track 1 is in the ON state.
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.

Point 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, the position detection 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.

Accordingly, 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, and indicates 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 and 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 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 an A play in the thrust direction. The drive connecting portion 34-1 for converting the rotation of the motor in the thrust direction has a B play between the lead screws, and is press-fitted into the drive connection 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 = 0.5, B = 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 by the microcomputer software when used in a state where 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. 7, 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
And a drive control unit 58 which has a measurement voltage and serves as drive control means.
Are input to the voltage judgment means 81 of the first embodiment.

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 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 device 1 for the left-hand heating device 1
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 noodle boil determination unit 86, and a water heater determination unit 87 according to the cooking mode.

Further, the drive judging sections 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.

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

First, FIG. 8 shows a key input state of the ignition and fire extinguishing operations. The key input determining means 72 determines whether the child lock 19 of the operation unit 5 is OFF in step S1 and receives various operation keys. If the ignition key is pressed for more than 0.3 seconds S2, it is determined that a key input has been made, 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.

Here, the meaning of setting the priority order 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 occurs, and the voltage of the microcomputer also drops and stops. 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 drop 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. 9 and 10 show the key input state of the thermal power control. FIG. 9 shows the key input method of the simple five-step thermal power control, and FIG. 10 shows the linear thermal power control in the five-step thermal 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. 9, the key input determining means 72
It is determined whether the stove is in use or not. S13. If the stove is in use, it is determined whether the heat power adjustment key input is 0.1 seconds or more. In this case, the left stove is S15, the right stove or S16, and the grill is S.
17 is determined, the corresponding stove is stored, and S18, the thermal power is increased.
Or S19 or DOWN or S20, and
Instruct S4 together with priority 3 and determine in S21 whether the same key has been continuously pressed for a predetermined time or more in S22.
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. 10, 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.
N or S31 is determined, and an instruction is given to the general operating means 64 together with the priority 3 in S32, and it is determined whether the same key is continuously pressed for a predetermined time or more in S33. 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 the linear thermal power adjustment is kept depressed is longer than that for the stepwise thermal power switching, the safety timer is set to a long time in S38.

FIG. 11 shows the contents of the key input judging means 72 for various cooking mode keys for the left cooking stove in the operation section 5. If a cooking mode key is input, S40, it is determined whether or not it is a water heater key, S41. If so, a water heater mode is determined, S42. If not, a noodle boil mode is determined. 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 S48 to S59,
Otherwise, S47, reset the input state to the original state S52. If not used, S46 activates a timer, S49, confirms whether there is an ignition operation within a predetermined time, S50, and if there is an ignition operation within a predetermined time, turns left counter through integrated operation means 64 of the next stage. An instruction is given to the filter drive determination unit 59 in S48, and if there is no ignition operation, reset and return to S52.

The above content is an example of the specific content of the key input determining means.

Next, the contents of the overall operating means 64 at the next stage through the above-mentioned key input determining means will be described below.

The general operating means 64 shown in FIG. 12 judges whether there is an ignition key input in S60, and judges whether the voltage of the voltage detecting means 57 for detecting the voltage of the battery is 3.2 V or less by the voltage judging means 81 in S61. In the following cases, the cooking use mode is set, and in the above cases, the inspection execution mode is set, and the processing shifts to the inspection mode determining means 77 (S63). Note that the inspection mode determination means 77 is separately described.

It is determined whether the instruction is a cooking mode instruction in step S65. 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 in step S66. If it is not a cooking mode instruction, S65, it is determined whether it is an ignition instruction, and S67.
In the case of the ignition instruction, it is determined whether or not another stove is used, and if no other stove is used, a drive instruction is issued to the corresponding stove, S69, and thereafter, the original electromagnetic valve 27 is opened and S70, S71 for outputting an igniter output 88.

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 the other motor is rotating, S67-2, it is determined whether the priority during rotation is lower than the priority of the corresponding stove, and S67-3. If lower, 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. 13 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 S76. If the instruction is a closing instruction, it is confirmed that the position is the closing position. S77. If the instruction is not the closing position (the encoder position is not 100), the motor error SUB is detected.
To step S78, and in the case of the closed position, return to step S76.

If it is not a closing instruction, S76, it is determined whether it is an ignition instruction, S79. In that case, a two-hour timer is turned on and S8.
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, when 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.
If there is no electromotive force, it is determined in S97. If not, it is determined whether 7 seconds have elapsed.
9. S100 as TC error, and S101 to instruct 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, S1
03, S100 to go to TC error processing.

If the instruction is not an ignition instruction, the flow goes to S79. If the instruction is not a fire extinguishing operation, the process proceeds to S106. 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
S122 (to be described later).

The reason why the current position is always checked is to check the closing position of the stove that is not being used while using the stove 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, taking into account safety and energy savings.

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 the 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. 6, it has been described that the number of pulses and the position do not match due to rattling of the mechanism when repeatedly used in the strong and weak directions. FIG. 14 shows the contents of the processing to be eliminated by performing the processing once after ignition.

FIG. 14 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 determination 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, S133, the rotation direction is instructed to reverse 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 stove drive judging means 59 in the case where an instruction to change the heating power is issued from the general operating means in the drive control section 58
Will be described. To change the thermal power, change the thermal power in 5 steps and 5
FIG. 15 shows a case of a 5-stage thermal power change, and FIG. 16 shows a case of a 5-stage + linear thermal power change.

In FIG. 15, it is determined whether the heating power change instruction is UP or not at S143. In the case of UP, if the current position is the strong position, no reception is made at S144. If not, the target position is set to the current heating power +1 and 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-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
“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 (“target pulse number−S <(G) + (a)
3) When "-N" is reached, S198, motor error SUB
Go to S171.

FIG. 16 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, when the position of the encoder 35 is in the range of low to medium-low, 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, medium speed S213; medium speed to high; S214; speed, high speed S215.
5) S216 and motor speed determination means (76) S217
A pulse is output to the motor via S218. After that, the position of the encoder 35 and the number of pulses are detected by the pulse counter, and S219 is performed.
1. In the case of the range of low to medium low with respect to the thermal power lamp S22
0, the lamp is set to medium to low S221, the range from medium to low is S222, the lamp is set to S223, and the medium to medium to high S2.
24, S225 when the lamp is medium-high, S when the range is medium-high
S226, if the lamp is medium-high, S228 if the lamp is high,
The lamp is strongly instructed in S229, and if the heating power adjustment key is kept pressed, the process returns to S230; otherwise, the process returns 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.

After the number of movable target pulses is determined, next, when the position of the encoder 35 is in the range from low to medium to low, the speed S238 is a low speed S239. 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, in the case of medium to medium high, the S254 lamp is set to S255, in the range of medium to high, the S256 lamp is set to medium to S257, and in the case of high to low, the S258 lamp is set to S259. 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 is the lighting of only the weak lamp, the next middle weak position is the lighting of 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 a linear heating power, by selecting the heating power in stages up to a rough heating power and continuing to press at that time, the linear heating power is changed, so that the ease of matching is improved.

Next, the drive judging sections 59, 60, and 6 of each stove
1 "motor error SU" of the motor malfunction process
B "will be described. FIG. 17 shows the schematic flow. When a motor error occurs and this routine is entered, the motor speed is increased to S260, the torque is instructed 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 S269, and it is determined whether the encoder 35 is the target position in S269. If the encoder 35 reaches the target position, the number of pulses is corrected based on FIG. 5 and S270, and the process returns to the original flow in S271. 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. In the case of S273, in the case of the first time, the rotation direction is reversed in the weak direction S274, the motor speed is increased to S275, the torque is instructed to the maximum S276, and the power saving determination means in the drive control unit 58 A pulse is output to the motor via S277 and S278 of the motor speed determining means, S279.

The pulse is 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.

When the motor rotation is in the weak direction, S267
The following items change for the sake of processing, and the following description will be given. 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.

Hereinafter, a general method for controlling the speed by making the frequency constant and performing intermittent power supply at the frequency will be described.

In FIG. 18, A is a high speed and 100% speed when a pulse is output at a constant frequency, B is a 67% speed and a middle speed is a state where one third of the frequency is lost.
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. 19, the 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.

The above-mentioned heating power change is also applied to the automatic cooking mode, and the relationship between the automatic cooking mode and the heating power adjustment is shown in FIG. 7 and FIG.
0 (a) to (c) and FIG. 21 will be described below.

The cooking mode selection in the left cooking stove drive judging section 59 and the automatic discrimination cooking mode without mode selection will be described. In the case of the left cooking stove 1, there are cases where the cooking mode is designated from the operation panel 5 and cases where there is no cooking mode designation.
(A), (b) and (c) and the processing procedure of FIG. 21 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. 20 (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, after that, after the overheating prevention temperature of the cooking of the oil is determined to monitor the overheating of the cooking of the oil, S294, and the process is shifted to the overheating prevention determining unit 85 as the overheating prevention means S29.
5.

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

FIG. 20 (b) 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, if the temperature is below the non-sticking temperature, “sensor 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.

[0110] By the processing operation of the non-sticking determination section 84, the processing of preventing non-sticking in water cooking (boiled food) 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.

[0111] The overheating prevention determination section 8 to which the processing has been shifted from step S295 of the processing procedure of the cooking mode determination 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 is performed.
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 at step S310 is not satisfied, a condition determination of "sensor temperature <overheat prevention temperature-18 ° C." is made at 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. The concept of overheating prevention has been described in the above outline, but will be described in detail based on industry standards for overheating prevention.

The concept of the cooking oil overheating prevention device is standardized in the industry. The main contents are when 200 ml of oil is heated in a designated thin aluminum pan for thermal efficiency measurement (hereinafter referred to as JIS aluminum pan). When the cooking oil overheat prevention device is activated, the oil temperature becomes 300 ℃
Automatic fire extinguishing within.

When 1 liter of oil is placed in a designated thin aluminum pan for thermal efficiency measurement (hereinafter referred to as JIS aluminum pan) and heated, the oil temperature remains 22 even if the cooking oil overheat prevention device is activated.
Do not extinguish automatically below 0 ° C.

In order to secure safety in a pot with extremely poor heat conduction, when 200 ml of oil is put in a designated stainless steel pot and heated, the cooking oil overheat prevention device is activated and the oil temperature is automatically extinguished within 350 ° C. thing. Is a matter to be observed. The above contents are to be complied with regardless of the heating power to be heated, and the maximum adjustment is required for appliances that cannot automatically adjust the heating power (in the case of the heating power adjustment method in which the heating power is adjusted manually). Perform the experiment with thermal power. There was a complaint that the utensil equipped with a cooking oil overheat prevention device prepared by this method was automatically extinguished unnecessarily and was extremely inconvenient to use.

When the present invention is configured to be able to automatically set the heating power, it is possible to automatically extinguish the fire unnecessarily. It provides specific measures for the two methods in the case where can be set.

More specifically, as shown in FIG. 21, when an iron frying pan (26φ) is baked as shown in FIG. 21, the overheating prevention temperature is set to 277 ° C. and When the temperature of the temperature sensor that measures the temperature of 277 ° C. reaches 277 ° C., the fire is extinguished automatically.

In FIG. 21, the horizontal axis represents the combustion time after ignition, and the vertical axis represents the temperature of the temperature sensor. In the case of 2550 kcal / h, the overheating prevention temperature of 277 ° C reaches 134 seconds and automatically extinguishes the fire. The operation of emptying the frying pan is sometimes performed, and it is difficult for the user to cut the frying pan. Similarly, in the case of 1600 kcal / h, it reaches in 142 seconds, and in the case of 1000 kcal / h, it reaches in 148 seconds, 700
In the case of kcal / h, it reaches in 298 seconds, and in the case of 400 kcal / h, it does not extinguish automatically because the thermal power is small and rises only up to 240 ° C. Therefore, in order to prevent unnecessary automatic fire extinguishing, the thermal power should be reduced to the minimum combustion when an appropriate temperature is reached. This is described in JP-A-63-153328.

FIG. 22 is a diagram showing the above contents. The horizontal axis represents the combustion time after ignition, and the vertical axis represents the temperature of the temperature sensor. C., but the present invention further has a second heating suppression temperature. That is, 160 ° C, the tempura temperature zone
A first heating suppression temperature 237 at a temperature not lower than a temperature of up to 220 ° C.
° C, and then a second heating suppression temperature of 257 ° C. First, in the case where there is no first heating suppression temperature of 237 ° C. but only the second heating suppression temperature, as shown by the curve A, even if the heating is switched to the low heating power at the second heating suppression temperature of 257 ° C., the overheating prevention temperature is 277 ° C. due to overshoot. Automatically extinguish the fire. Therefore, when there is no second heating suppression temperature, the intensity of the thermal power is controlled at the first heating suppression temperature of 237 ° C. On the other hand, by having the second heating suppression temperature as in the present invention, the control temperature becomes 257 ° C., and the control temperature can be raised by 20 ° C. In the case of frying pan cooking, if there is no overheating prevention device, it is used at around 300 ° C., and the higher the temperature, the more the user's satisfaction is improved. However, in this method, when the first heating suppression temperature is 237 ° C. and the heating power is set low, the temperature may not reach the second heating suppression temperature depending on the container, and a low heat may be maintained no matter how long. If this condition is not used, the cooking power is too low to use and the cooking power cannot be used.
The following considerations are necessary.

In FIG. 23, the horizontal axis represents the combustion time after ignition, and the vertical axis represents the temperature of the temperature sensor and the state of thermal power. The combustion is performed strongly up to the first heating suppression temperature of 237 ° C., and the combustion is performed weakly above 237 ° C. In this case, when the temperature of the temperature sensor does not reach the second heating suppression temperature for a predetermined time, the heating power is forcibly increased, and the first heating suppression temperature is extinguished.

FIGS. 24 and 25 show the case where multi-stage thermal power control is performed, and show the overheat prevention temperature at each thermal power when the test based on the unified standard is performed.

FIG. 24 shows that when 200 milliliters of oil was placed in a designated aluminum thin pan for thermal efficiency measurement (hereinafter referred to as JIS aluminum pan) and heated, the cooking oil overheating prevention device was operated to keep the oil temperature within 300 ° C. It represents the temperature at each thermal power in response to automatic fire extinguishing.

For example, when the thermal power is 2550 kcal / h, 27
When the fire is automatically extinguished at 7 ° C, the oil temperature stops at 300 ° C. When the firepower is 1600 kcal / h, the oil temperature stops at 300 ° C when the fire is automatically extinguished at 295 ° C.
The temperature of the sensor rises only to 94 ° C., and the oil temperature at that time does not rise to 275 ° C. or more. In addition, thermal power 700kcal
In the case of / h, the sensor temperature rises only up to 249 ° C., and the oil temperature at that time does not rise above 227 ° C. In the case of a thermal power of 400 kcal / h, an experimental result was obtained that the sensor temperature rose only up to 188 ° C. and the oil temperature at that time did not rise to 167 ° C. or more. Needless to say, the above is different depending on the appliance and the heating power, so it is necessary to actually determine the variation in consideration of the appliance.

FIG. 25 shows that in order to ensure safety in a pot with extremely poor heat conduction, when the cooking oil overheating prevention device is activated when 200 ml of oil is put in a designated stainless steel pan and heated, the oil temperature is within 350 ° C. Automatically extinguishes the temperature, and represents the temperature at each thermal power.

For example, when the thermal power is 2550 kcal / h, 27
When the fire is automatically extinguished at 7 ° C, the oil temperature stops at 350 ° C (27
Even if the fire is automatically extinguished at 7 ° C, the temperature of the stainless steel pan will be 350 ° C due to poor heat conduction.) In the case of a thermal power of 1600kcal / h, if the fire is automatically extinguished at 300 ° C, the oil temperature will stop at 350 ° C and the thermal power of 1000kcal / h. In case of automatic fire extinguishing at 330 ° C, the oil temperature stops at 350 ° C, and when the thermal power is 700 kcal / h, the oil temperature does not rise above 330 ° C, so the sensor temperature may be any number of times, Actually, since the temperature sensor has a heat-resistant upper limit temperature, it cannot be set to a temperature higher than the upper limit temperature. Similarly, when the thermal power is 400 kcal / h, the oil temperature does not rise above 200 ° C. The sensor temperature can be any number of times, but in reality this temperature cannot be set higher than the upper limit temperature because the temperature sensor has a heat resistant upper limit temperature.
° C.

As for the overheat prevention temperature that satisfies the above conditions, the standard can be satisfied by setting a low overheat prevention temperature for both thermal power plants.

FIG. 26 is a flow chart showing the overheating prevention means having the overheating prevention temperature, the first heating suppression temperature, and the second heating suppression temperature.

The ignition key is pressed to ignite S316. In the ignition operation, the thermal power is automatically increased to a high thermal power, and in S317, the temperature of the temperature sensor by the moisture presence / absence determining means of the cooking mode determination section 83 and the temperature rise indicate the water cooking. In step S318, if it is the cooking of water, the processing jumps to the processing of water (omitted since it is different from the object of the present invention;
No. 541) In the case of cooking oil, in S319, the overheat prevention temperature of the current thermal power is set to 277 ° C., and in S320, the first
The heating suppression temperature is set to 237 ° C., S321, the second heating suppression temperature is set to 257 ° C., S322, the sensor temperature <80 ° C.
S323, and if so, the initial flag is set to O.
SFF is set to FF, the timer is set to 0, S325, the second flag is turned off, S326, the 30-minute timer is set to 0, and the process returns to S327. Otherwise, an initial flag OF that determines whether the first heating suppression temperature has been reached has not been reached.
S328. If the first flag is OFF, it is determined whether the sensor temperature is higher than the first heating suppression temperature.
If so, the heating power is reduced to S330, the first flag is set to ON, and the process returns to S331 and A. It is determined whether the sensor temperature is higher than the first heating suppression temperature in step S329.
Return to

Also, it is determined whether the first flag is OFF or not at S32.
8. If the first flag is not OFF, it is determined whether the sensor temperature <second heating suppression temperature (S332), and if so, the timer is turned on and S333, and it is determined whether X seconds have elapsed (S33).
4. If the time has elapsed, instruct a high heat power and return to S335, A.

It is determined whether sensor temperature <second heating suppression temperature is satisfied (S332), and if not, it is determined whether the second flag for determining whether the temperature has reached the second heating suppression temperature for the first time is OFF (S32).
6. In that case, turn on the 30-minute timer and S337, 2nd
The flag is turned on, and the process returns to S338, A. Otherwise S
336, S339: It is determined whether 30 minutes have elapsed, and if it has elapsed, S340, which automatically extinguishes the fire and terminates the operation. S is determined as strong
342, if it is strong, return to A; otherwise, instruct high heat, return to S343, A.

It is determined whether the sensor temperature is lower than the second heating suppression temperature in step S341. If not, the thermal power is weakened. In step S344, it is determined whether the sensor temperature is lower than the overheating prevention temperature in step S345. If not, extinguish the fire automatically.

As described above, in the case of switching between the strong and weak two-stage heating power, it is possible to provide an appliance which can be used at a high temperature without having to unnecessarily operate the cooking oil overheating prevention device and having the second heating suppression temperature. . It is dangerous to keep the high-temperature state forever, but by providing a 30-minute timer, it is possible to automatically extinguish the fire after a lapse of time, which is safe. In addition, the meaning of canceling the timer for 30 minutes when the sensor temperature drops to 80 ° C. or less means that, depending on the cooking, water may be put in the same container after frying, and then the cooked food may be cooked and cooked for 30 minutes. This is because if the fire is automatically extinguished, the usability will deteriorate.

FIG. 27 shows an operation flow of the cooking oil overheating prevention means in an appliance having a two-stage automatic heating power switching, in which the overheating prevention temperature and the heating suppression temperature for the high heating power and the heating suppression temperature for the low heating power are used. The configuration has an overheating prevention temperature. The feature of this method is that the overheating prevention temperature of low heat power is about 3
Since the temperature can be set at around 50 ° C., there is a feature that the temperature of the container can be maintained at a relatively high temperature without a fear of overshoot.

That is, ignition is performed S347, combustion is automatically started with high thermal power S348, and the overheating prevention temperature for high thermal power =
Set 277 ° C and S349, set heating suppression temperature = 257 ° C and set S350. Determine if sensor temperature> heating suppression temperature and S351. In that case, instruct the heating power to be weak S352 and set overheating prevention temperature = 350 ° C and set S353 and sensor. S354 to determine whether the temperature is greater than the overheating prevention temperature. If so, the fire is automatically extinguished and terminated (S354-1). Otherwise, S3
Return to 51. Determine whether sensor temperature> heating suppression temperature S3
51, if not, determine if the current thermal power is strong, S355,
In that case, return to S351; otherwise, S348
Return to

In addition to the above, the limitation of the repetition time of the heating power is described with reference to FIG. 26, and therefore will not be described. However, the combination use is only an example.

[0138]

As described above, according to the present invention, the following effects can be obtained.

(1) In the first aspect of the present invention, low heat is set at a low temperature for the first time, but control can be performed at a high temperature for the second and subsequent times of actual cooking, which is convenient.

(2) In the invention of claim 2, since the first heating suppression temperature is forcibly deleted, the time of the low heat is short and the user's request is required (cooking cannot be performed if the low heat continues, and it is desired to use a high heat power quickly). Has the effect of being able to satisfy

(3) According to the third aspect of the present invention, since the sensor does not ignite even if it is left at an intermediate heating power of, for example, 700 kcal / h, the sensor temperature can be raised to a heat-resistant temperature, so that the sensor temperature can be raised. And the effect of not inadvertently extinguishing the fire automatically.

(4) In the invention of claim 4, if the heating suppression temperature is appropriately set so that the temperature does not exceed the standard temperature due to overshoot when the fuel is burned at a low level, the fire is not automatically extinguished as compared with the conventional case, and the high temperature is reduced. Thus, there is an effect that an appliance complying with the standard can be provided.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an appearance of a gas cooker 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.

FIG. 3A is a plan view of the gas control block, and FIG.

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

5 (a) to 5 (f) are correlation diagrams of the pattern of the encoder and the thermal power.

6 (a) and 6 (b) are explanatory diagrams showing the looseness of a flow control mechanism of the gas control unit.

FIG. 7 is a block diagram of the control unit.

FIG. 8 is a schematic flowchart of the ignition / extinguishing operation.

FIG. 9 is a schematic flowchart of the key input determination means.

FIG. 10 is a schematic flowchart of the key input determination means.

FIG. 11 is a schematic flowchart of various cooking mode key input determining means for the left cooking stove;

FIG. 12 is a schematic flowchart of the overall operation determining means.

FIG. 13 is a schematic flowchart of a stove drive determining unit.

FIG. 14 is a schematic flowchart of the error detection processing means.

FIG. 15 is a schematic flowchart of the thermal power change determination means.

FIG. 16 is a schematic flowchart of the thermal power change determination means.

FIG. 17 is a schematic flowchart of the motor malfunction processing means;

18 (A) to 18 (D) are explanatory diagrams of the same speed control.

FIG. 19 is a schematic flowchart of the speed control.

FIG. 20 is a schematic flowchart of the (a), (b), and (c) automatic discrimination cooking modes.

FIG. 21 is a diagram showing a temperature rise when the frying pan is baked empty.

FIG. 22 is a diagram showing a correlation between the temperature rise of the frying pan, the overheating prevention temperature, and the heating suppression temperature.

FIG. 23 is a diagram showing a correlation between the first heating suppression temperature and the second heating suppression temperature.

FIG. 24 is a diagram showing a correlation between the overheating prevention temperature and thermal power.

FIG. 25 is a diagram showing a correlation between the overheating prevention temperature and the thermal power.

FIG. 26 is a schematic flowchart of the overheat prevention device.

FIG. 27 is a schematic flowchart of the overheat prevention device.

[Explanation of symbols]

 2 Pan bottom temperature sensor 5 Operation part 6 Ignition / fire extinguishing key for left cooking stove (Operating means) 7 Ignition / fire extinguishing key for right cooking stove (Operating means) 8 Ignition / fire extinguishing key for grille (Operating means) 9 Fire power for left cooking stove Adjustment key (operation means) 10 Heating key for left cooking stove (operation means) 11 Heating adjustment key for right cooking stove (operation means) 12 Heating adjustment key for right cooking stove (operation means) 13 Heating adjustment key for grill (operation Means) 14 Grill power control key (operating means) 23 Left hand burner 24 Control circuit 25 Gas control block 29 Left hand gas control unit 30 Right hand gas control unit 31 Grill gas control unit 33 Flow control unit 34 Stepping motor 36 Right burner burner 37 Grill burner 58 Drive control unit 83 Cooking mode determination unit 85 Overheat prevention determination unit 86 Temperature adjustment determination unit

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kayo Nakai 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Mitsumasa Matsumura 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Mitsuo Yokohata 1006 Odaka Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A burner, a temperature sensor for detecting a temperature of a pan bottom, a flow rate control means for controlling a gas flow rate, an electric drive means for driving the flow rate control means, and a temperature state of the temperature sensor. A drive control means for controlling the drive of the electric drive means; and an operation means for giving an instruction to the drive control means, wherein the drive control means is provided with a cooking oil overheating prevention means, and the temperature of the temperature sensor is predetermined. In addition to a configuration in which the fire is automatically extinguished when the overheating prevention temperature is reached, the cooking oil overheating prevention means is provided with a gas flow rate so as to reduce automatic fire extinguishing even though a high temperature is required in frying pan cooking or the like. A gas cooker having a configuration in which a first heating suppression temperature and a second heating suppression temperature for controlling the temperature are provided, and the first heating suppression temperature is operated only for the first time. 2. The first heating suppression temperature is forcibly deleted when the temperature of the temperature sensor reaches the first suppression temperature and does not reach the second suppression temperature even after a predetermined time has elapsed. Gas cooker. 3. A burner, a temperature sensor for detecting the temperature of the bottom of the pot, a flow rate control means for controlling a gas flow rate, an electric drive means for driving the flow rate control means, and a temperature state of the temperature sensor. A drive control means for controlling the drive of the electric drive means; and an operation means for giving an instruction to the drive control means, wherein the drive control means is provided with a cooking oil overheating prevention means, and the temperature of the temperature sensor is predetermined. In addition to the configuration that automatically extinguishes the fire when the temperature reaches the overheating prevention temperature, the gas flow rate is set so as to reduce automatic fire extinguishing even though the cooking oil overheating prevention means requires high temperature in frying pan cooking or the like. A gas cooker in which a heating suppression temperature lower than an overheating prevention temperature is provided for control, and the overheating prevention temperature is switched to an overheating prevention temperature according to the controlled heating power. 4. The temperature of the heating suppression temperature is set such that when the combustion is performed with the maximum heating power to the heating suppression temperature in a container having a large overshoot, the temperature of the temperature sensor does not exceed the minimum heating power overheating prevention temperature. The gas cooker according to claim 3.