JP2002295832A - Gas cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cooking device, in which waste of remaining gas is prevented from occurring, after boiling, when it is left standing. SOLUTION: The gas cooking device comprises a gas-flow monitoring means, a gas-flow control means 11, a temperature monitoring means, a boiling detector, and a timing means; the gas-flow monitoring means monitors gas flow rate at present use, by a pan-bottom sensor 6 installed in one or more cooking units; the flow control means 11 selects automatically a gas flow to be supplied to each cooking unit; and the temperature monitoring means monitors temperature of the sensor 6. The boiling detector detects boiling of a cooking material, based on the temperature progress in the sensor 6; the timing means measures elapsed time in cooking at the present flow rate, after detection of the boiling; and the cooking appliance has the function, in which even if a user has not regulated the gas-flow rate after detection of boiling, the time until automatic decrease in the flow rate is made variable, then the cooking unit is shut down. Thus, should the cooking be left along in the course of boiling or cooking, the gas flow is throttled automatically and shut down according to the heating power, so that waste of gas is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stove capable of automatically changing or shutting off a gas amount.

[0002]

2. Description of the Related Art FIG. 5 is a front view showing a state in which a conventional gas cooker is installed in a kitchen.

[0003] As shown in FIG. 5, a conventional gas cooker 1 is shown.
Are the left and right stoves 2 on the top of the instrument body, and the right stove 3 on the right
And a grill 4 and an operation unit 5 on the front surface of the appliance body. The right cooker 3 is provided with a pan bottom sensor 6 for measuring the temperature of a pot, a frying pan, etc. on the cooker.
In addition, the operation unit 5 is provided with ignition / extinguishing buttons 2A, 3A, 4A corresponding to the left stove 2, the right stove, and the grill 4, and the heating power adjustment knobs 2B, 3B, 4B, which are used by the user. Press the ignition / extinguish button on the stove to ignite the gas, and adjust the heating power to an appropriate value with the heating power adjustment knob to cook.

[0004]

However, in the above-mentioned conventional gas cooker, a high heat is used immediately after ignition, and a low heat is generally used after boiling, but a stove is used. Forgetting, there is a problem that the gas is wasted, continuing to use it with high heat even after boiling water or the like.

An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a gas cooker which is safe with a stove provided with a sensor and which does not waste gas.

[0006]

SUMMARY OF THE INVENTION The present invention provides a gas amount monitoring means for monitoring the amount of gas currently used by installing a pan bottom sensor on one or more stoves, and a gas supply to each stove. It has a shut-off means, a temperature monitoring means for monitoring the temperature of the pan bottom sensor, and a control means for controlling the whole operation. The first control means includes a boiling detection means for detecting the boiling of the food from the temperature transition of the pan bottom sensor. And, having a time measuring means for monitoring the time used in the current gas amount after the boiling detection, if the user did not adjust the gas amount after the boiling detection, the gas amount by the current gas amount This is a gas cooker set so as to vary the cut-off time a until the cut-off.

[0007] According to the present invention, even if the user forgets to turn off the stove, the time until the gas is cut off is varied by the selected heating power, so that the cooking object such as a hot pot is boiled more than necessary. It prevents wasteful use such as heating with the amount of gas.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention according to claim 1,
The means for monitoring the gas amount means a means for monitoring the gas amount of the stove being used, and can be realized by, for example, a gas flow meter. In the embodiment, a thermocouple provided on the stove is used as another means. As monitoring means, the electromotive force of the thermocouple is input to a microcomputer in a control board, which is a control means, and the amount of gas is monitored from the heating power in the stove.

The time measuring means means means for measuring the elapsed time using the current gas amount, and can be easily realized as one of the control operations of the microcomputer as the control means. When the pot containing the food containing water is heated from room temperature with a constant heating power, the output of the pan bottom sensor pressed against the bottom of the pan increases in proportion to the time. As the temperature of the object approaches 100 ° C., boiling begins and the temperatures equilibrate. Based on the change in the temperature transition, the start of boiling is determined by the microcomputer through the output of the pan sensor. The gas shutoff means means for automatically shutting off the gas, and can be realized by driving a closing member provided at the gas passage with a stepping motor to close the gas passage.

If the gas amount adjustment is not performed, the control for varying the shutoff time a until the gas is interrupted according to the gas amount at that time can be easily realized as one of the microcomputer control operations. .

In the present invention according to claim 2, the gas amount monitoring means, the time measuring means, and the boiling detecting means are the same as the gas amount monitoring means, the time measuring means, and the boiling detecting means in the present invention according to claim 1. Further, the gas amount adjusting means means a means for automatically adjusting the gas amount. In the embodiment, the closing provided at the gas passage is driven by a stepping motor to adjust the flow rate, and the driving amount is the stepping motor. The amount of rotation is detected and controlled by an encoder. Further, when the gas amount adjustment is not performed, control for varying the gas amount adjustment time until the gas is throttled according to the gas amount at that time can be easily realized as one of the microcomputer control operations.

In the third aspect of the present invention, after the gas amount is reduced, the cutoff time b until the gas is cut off is varied by the gas amount adjustment time, and the length of the cutoff time b is: Control that varies in conjunction with the gas amount adjustment time can be easily realized as one of the microcomputer control operations.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a front view showing a state in which a gas cooker of this embodiment is installed. As shown in FIG. 1, a gas cooker 1 according to the present invention comprises a left cooking stove 2 on the upper left side of the appliance main body, a right cooker 3 on the right side thereof, and a grill 4 on the front of the appliance main body.
And an operation unit 5. The operation unit 5 is provided with an ignition switch 4a for grill, an ignition switch 2a for left cooking, and an ignition switch 3a for right cooking in order from the left side. Further, a plurality of left-hand heating control switches 2b are provided above the left-hand heating switch 2a. Right stove ignition switch 3a, grill ignition switch 4a
Similarly, a plurality of heating power adjustment switches 3b for right cooker and a plurality of heating power adjustment switches 4b for grill are provided above the right stove 3. A pan bottom sensor 6 is provided on the right stove 3.

The operation of the above configuration will be described with reference to the drawings. FIG. 2 is a diagram illustrating the operation principle of the present embodiment. Each switch 2a, 2b, 3a, 3 of the operation unit 5
b, 4a, and 4b are connected to the control board 8 by signal lines. When the user uses the right stove 3,
First, the right cooker ignition switch 3a is pressed. As a result, a conduction signal is transmitted to a microcomputer (hereinafter, referred to as a microcomputer) provided on the control board 8, and the microcomputer opens the solenoid valve 9.

Next, the microcomputer drives the electric drive unit 10 to move the closing member 12 of the gas amount adjusting unit 11 to supply gas to the right hand hob 3. After supplying the gas, the control substrate 8
Outputs a high-pressure discharge to the right cooker 3 via the igniter 13 and the ignition plug 14, and ignites the gas by the high-pressure discharge. The thermocouple 15 is heated by the ignited flame, and the microcomputer of the control board 8 monitors the generated electromotive force and the output of the pan bottom sensor 6 pressed against the pan. When the flame is extinguished due to a spill or the like and the electromotive force falls below a predetermined value, the microcomputer moves the closet 12 via the electric drive unit 10 to shut off the gas.

When the heating power is adjusted, when the heating power adjustment switch 3b for the right stove is pressed, the heating power indicator LED 3c for the right cooking stove provided above the heating power switch 3b for the right cooking stove changes to a corresponding heating power position. The electric drive unit 10 including the stepping motor 16 and the encoder 17 is operated. When the encoder 17 determines that the target position has been reached, the stepping motor 16 is stopped.

A thermal power tip 18 is provided on the closing member 12 of the gas amount adjusting section 11, and the thermal power tip 18 is provided with a plurality of predetermined holes. Gas passage 19 of the closure 12
The passage area of the gas is changed by the combination of the hole of the thermal power tip 18 and the gas amount is adjusted. Therefore, it is configured such that the thermal power currently used is determined from the position of the encoder 17.

Table 1 is a table showing another suitable heating power and reference time so as not to cook in this embodiment.

[0020]

[Table 1]

As shown in (Table 1), cooking using a relatively strong heat in cooking and scouring dishes requires a short time (15 minutes).
Minutes or less), but dishes using low heat are often used for a long time.

FIG. 3 is a schematic flowchart of the first embodiment of the present invention. In FIG. 3, step S4 is a boiling detecting means, and it is determined whether or not the food in the pan is in a boiling state based on temperature information from the stove sensor. If it is determined that the food is boiling, the process proceeds to step S5. In steps S7, S8, the amount of gas currently used is monitored. If the gas amount determined from the position of the encoder 17 in step S5 is equal to or larger than the predetermined value 1, the process proceeds to step S9. If the value is equal to or less than the predetermined value 1, the process proceeds to S6,
If the value is equal to or more than the predetermined value 2, the process proceeds to step S10. Similarly, S
Branched by gas amount in 7 steps and S8 step, S11
Proceed to steps S13.

Steps S9 to S13 are interruption time determining means. In steps S9 to S13, the cutoff times 1 to 5 for each thermal power are determined. The cutoff time is the shortest for the cutoff time 1 and becomes longer as the number increases. Next, the process passes through the step S14, and the usage time after the boiling is detected in the step S15 is measured.

Next, in step S16, the current use time is compared with the cutoff time a determined this time. If the use time is equal to or longer than the cut-off time a, the process proceeds to step S17. S17
The steps are gas shut-off means. In step S17, the closing 12 is moved via the electric drive unit 10 in FIG.
It is configured to shut off gas.

As described above, with the above configuration, the gas amount monitoring means for monitoring the amount of gas currently used by the user on the stove, the cut-off time determining means for determining the cut-off time, and the automatic control of the gas amount supplied to the stove. The gas shut-off time is automatically set to be longer for each predetermined gas amount range after the start of cooking, after the food in the pot boils, and for each predetermined gas amount range. , Gas can be wasted. In the present embodiment, the cutoff time is divided into five stages. However, if the cutoff time is two stages or more, the above effects can be obtained. At this time, it is obvious that the greater the number of stages, the more effectively the gas can be prevented from being wasted.

(Embodiment 2) A gas cooker according to a second embodiment of the present invention will be described below with reference to the drawings. Example 2
Relates to claims 2 and 3.

FIG. 4 is a schematic flowchart of the second embodiment of the present invention. In FIG. 4, steps S4 to S8 are the same as those in the first embodiment, and a description thereof will be omitted. If the gas amount determined from the position of the encoder 17 in step S5 is equal to or greater than the predetermined value 1, the process proceeds to step S18. If the value is equal to or less than the predetermined value 1, S6
If the value is 2 or more, the process proceeds to S19.
Similarly, the process branches in steps S7 and S8 for each gas amount, and proceeds to steps S20 to S22. Steps S18 to S22 are gas amount adjusting means.

In steps S18 to S22, the gas amount adjustment time 1 to the gas amount adjustment time 5 for each thermal power are determined. As for the gas amount adjustment time, the gas amount adjustment time 1 is the shortest,
The longer the number, the longer. S18 Step to S22
After the gas amount adjusting means in the step, the cutoff time b after the gas amount adjustment in S23 to S27 corresponding to each step.
It becomes a decision means. At this time, the shut-off time b after the gas amount adjustment is the shortest for the shut-off time 1 and becomes longer as the number increases.

Steps S15 and S17 are the same as those in the first embodiment, and a description thereof will be omitted. In step S28, the gas is adjusted by moving the gas amount adjusting unit 11 via the electric drive unit 10 in FIG. 2. Next, in step S29, the time after the gas amount adjustment is measured. Next, in step S30, the time after the gas amount adjustment is compared with the cutoff time determined this time. If the time after the adjustment is equal to or longer than the cut-off time, the process proceeds to step S17.
Returning to stage 29, step S17 is a gas shut-off means.

As described above, with the above structure, a gas amount monitoring means for monitoring the gas amount currently used by the user on the stove, a gas amount adjusting means for automatically adjusting the gas amount supplied to the stove, Since the gas amount adjustment time is automatically set to be longer automatically after the gas amount adjustment, wasteful use of gas can be eliminated. Further, even after the gas amount has been adjusted, the food is burned with a low heat, so that it is possible to prevent the food from cooling immediately. In this embodiment, the cutoff time is divided into five stages.
As in the case of the first embodiment, if the number of stages is two or more, the above-mentioned effect can be obtained, and as the number of stages further increases, wasteful use of gas can be effectively prevented.

[0031]

As is apparent from the above description, the gas cooker according to the present invention has the following effects. Gas amount monitoring means for monitoring the amount of gas currently used by the stove by the user; shutoff time determining means for determining the shutoff time; and gas shutoff means for automatically shutting off the gas amount supplied to the stove. Control means for controlling the operation, wherein the first control means comprises:
Usage time measuring means for monitoring the usage time from the detection of boiling, gas adjustment determining means for adjusting the gas, and then adjusting the gas shutoff time and the shutoff time within a predetermined gas amount range and determining the shutoff time. Means for automatically adjusting and shutting off the gas in the stove based on the gas adjustment time and the cutoff time determined in the previous period based on the use time from the boiling detection, thereby making the hot water hot water. Therefore, even if a dish or a stewed dish is left during cooking, the gas is squeezed or cut off in accordance with the thermal power, so that waste of the gas can be eliminated.

[Brief description of the drawings]

FIG. 1 is a front view of a gas cooker according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing the operation principle of the cooking device.

FIG. 3 is a flowchart showing the operation of the cooking device.

FIG. 4 is a flowchart showing the operation of the gas cooker according to the second embodiment of the present invention.

FIG. 5 is a front view of a conventional gas cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas cooker 5 Operation part 6 Pan sensor 7 Pan 8 Control board (control means) 9 Solenoid valve (gas shutoff means) 10 Electric drive part 11 Gas amount adjustment part (gas amount adjustment means)

Continued on the front page (72) Inventor Kaoru Soga 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Yoshiteru Kagomoto 1006 Okadoma Kadoma, Kadoma City Osaka Pref. (72) Inventor Tadashi Yanagisawa 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 3K068 AA01 BA01 BB01 BB12 BB25

Claims (3)

[Claims] At least one pan has a pan bottom sensor attached thereto, and a gas amount monitoring means for monitoring a gas amount currently used, a gas shutoff means for supplying gas to each stove, and the pan bottom sensor. Temperature monitoring means for monitoring the temperature of the food, and control means for controlling the whole operation, wherein the control means includes a boiling detection means for detecting the boiling of the food from a temperature transition of the pan sensor, and a boiling detection means. It has time measuring means to monitor the time used in the current gas amount after, and if the user does not adjust the gas amount after detecting the boiling, until the gas is shut off by the current gas amount Gas cooker with variable shut-off time. 2. A gas amount monitoring means for mounting a pan bottom sensor on at least one stove and monitoring a gas amount currently used, and a gas control for automatically switching a gas amount supplied to each stove. Means, temperature monitoring means for monitoring the temperature of the pan sensor, and control means for controlling the overall operation, wherein the control means includes a boiling sensor for detecting the boiling of the food from the temperature transition of the pan sensor. Detecting means and time measuring means for monitoring the time used at the current gas amount after the boiling detection, and after the boiling detection, if the user does not adjust the gas amount, the current gas amount A gas cooker that changes the gas amount adjustment time until the gas amount is reduced. 3. The shutoff time until shutoff of the gas is varied by adjusting the gas amount after the gas amount is reduced.
The described gas cooker.