JPH1089677A - Burning cooking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep unchanged and improve ignition performance of a burning cooking apparatus such as a gas table which mainly uses a battery as a power source, and hence ensure power saving. SOLUTION: There is provided combustion control means 14 for controlling a solenoid valve 6 or ignition means 7 upon ignition in response to detection temperature of room temperature detection means 12 before and after the ignition. Ignitability is made equivalent to an ordinary temperature environment by increasing only at the time of low temperature ignition time, driving voltage, and a current. In other words, effective and secure ignition is ensured with necessary and minimum power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for saving power while maintaining and improving the ignition performance of a combustion cooking appliance such as a gas table mainly powered by a battery.

[0002]

2. Description of the Related Art Conventionally, a combustion apparatus of this type is generally as shown in FIG. In FIG. 15, when the user presses the push button of the ignition operating means 1,
The open / close switch 2 integrated with the ignition operating means 1 is closed and the gas supply path 3 is opened. Further, the combustion control means 4 composed of a one-chip microcomputer which is energized by the open / close switch 2 forcibly attracts the solenoid valve 6 by the current from the battery 5 for a predetermined time (for example, 10 seconds). The gas supply path 3 can be continuously opened even if the hand is released from the first push button. At the same time, the combustion control means 4 also energizes the ignition means 7 for a predetermined time, and the discharger 8 also performs an ignition operation. That is, when the discharger 8 ignites the gas ejected from the burner 9 installed at the end of the gas supply passage 3 and the burner 9 starts burning, the ignition detection signal 10 composed of a thermocouple sends an ignition confirmation signal to the combustion control device. It is conveyed to 4. The pot 11 is heated by the combustion of the burner 9, and the temperature inside the pot 11 can be detected by the pot bottom temperature detecting means 12 composed of a thermistor installed near the pot bottom.

FIG. 16 is a block diagram viewed from the signal flow. The supply voltage to the combustion control means 4 is stabilized via the voltage regulator 13 in order to cope with the battery voltage fluctuation at the time of driving the load such as the ignition means 6. Further, when cooking tempura or the like, there is a danger of tempura oil igniting due to prolonged heating. Therefore, during heating, the pan bottom temperature detection means 1
When the pan bottom temperature detected from 2 exceeds a predetermined value, the combustion control means 4 closes the gas supply path 3 by stopping the forced adsorption of the solenoid valve 6, shuts off the gas supply, and prevents ignition beforehand. I do.

Further, the detailed operation of the combustion control means 4 will be described with reference to a flowchart of FIG. 17 and a time chart of FIG. In FIG. 17, it is confirmed in step 101 that the ignition operation means 1 is ON, and
At 105, the ignition time T1 is set, the driving of the ignition means 7 is started, the forced suction time T2 of the solenoid valve 6 is set, and the solenoid valve 6 is forcedly sucked, that is, the opening control is started. Where T1,
T2 is set to a fixed value (T1 <T2) such as T1 = 10 seconds and T2 = 12 seconds. This combustion control means 4
At least two independent timers are provided to determine the passage of time between T1 and T2.
If 1 has elapsed, the driving of the ignition means 7 is stopped in step 107, and the solenoid valve 6 is stopped in step 108 until T2 has elapsed.
Is continued. If the ignition operation means 1 is operated and turned off before T2 elapses in step 109, the process immediately proceeds to step 110 and the gas supply is forcibly shut off by controlling the solenoid valve 6 to be closed. Then, the mode shifts to the power down mode (step 111), and the processing ends.

On the other hand, if the forced adsorption time T2 has elapsed, it is confirmed in step 112 that the ignition operation means 1 is ON, and in step 113, the ignition detection signal from the ignition detection means 10 is inputted. Further, at step 114, it is confirmed that the thermistor of the pan bottom temperature detecting means 12 has not caused an open or short-circuit failure. Further, the pot bottom temperature TR is detected in step 115, and in steps 116 to 117, the forcible suction (opening control) of the solenoid valve 6 is continued until the detected temperature TR reaches 230 ° C., and the process returns to step 112. If the forced adsorption time T2
After elapse, the ignition operation means 1 is turned off,
If ignition has not been detected or if the pan bottom temperature detecting means 12 has failed, the routine proceeds to step 110, where the solenoid valve 6 is controlled to close. When the pot bottom temperature exceeds 230 ° C., the solenoid valve 6 is controlled to be closed in step 110 in the same manner as described above. FIG.
As can be seen from the time chart, after the ignition operation is performed, during the predetermined ignition time T1 and the solenoid valve adsorption time T2,
By continuing ignition operation regardless of actual ignition,
Automatic ignition control that does not easily cause misfiring is realized.

[0006]

However, in the above-mentioned conventional configuration, the ignition control is performed on the assumption of the worst ignition conditions such as when the room temperature is low. There is a problem that the battery is forcedly ignited or forcibly adsorbed by flowing the battery, which adversely affects the battery life. Further, when the forced ignition is continued for a predetermined time after the completion of the ignition, there is a problem that the battery is drastically consumed and an excessively long ignition sound is required when the ignition means is discharged. In general, unless the user can confirm the normal end of the ignition operation,
Since the user cannot be safely separated from the front of the cooking utensil, the user is ultimately restrained for a predetermined period of time, and there is a problem that the user does not save time.

[0007] Further, if the ignition control is performed for a short time in accordance with the use at room temperature, the internal resistance of the battery and the internal resistance of the solenoid valve increase in a low-temperature environment such as a cold winter morning, and the user performs the ignition operation many times. There was a problem that we had to try.

Further, the ignition stabilization time after the ignition detection by the ignition detection means is also affected by the ambient temperature. Therefore, assuming the worst situation, in a high temperature environment or when the elapsed time from the last use is short, the forced ignition is uselessly performed. There was a problem that the battery was exhausted due to continued forced adsorption.

The internal resistance of the battery itself increases as the battery voltage decreases or the temperature decreases, and the current that can be extracted from the battery is limited. If multiple stoves and grills are to be used at the same time, attempting to drive a load with a large inrush current at the same time will cause a large drop in the battery voltage, and the drive current to each load will not be secured or the supply voltage to the combustion control There has been a problem that the temperature decreases and stops operating.

[0010]

In order to solve the above-mentioned problems, the present invention comprises combustion control means for controlling at least one of an electromagnetic valve and an ignition means at the time of ignition according to a temperature detected by a room temperature detection means. It is a thing. When the room temperature is low, the internal resistance of the battery and the solenoid valve that is the load increases,
By making the load drive time or drive voltage longer or higher according to the detected temperature, the ignition performance can be made equal to that in a normal temperature environment.
Conversely, when the room temperature is high, power saving can be achieved while maintaining ignition performance by shortening or lowering the load drive time and drive voltage according to the detected temperature. In other words, reliable ignition can be performed efficiently with the minimum necessary power.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a room temperature detecting means for detecting a room temperature, a solenoid valve for opening and closing a fuel gas supply path, an ignition means, and the ignition means according to the temperature detected by the room temperature detecting means. It is provided with at least one of an electromagnetic valve and combustion control means for controlling the ignition means. The combustion control means reliably performs ignition control with minimum necessary power without waste according to the room temperature, so that power saving can be achieved. In particular, when the power source is a battery, the life is long, and the frequency of battery replacement by the user can be reduced. As the service life of the battery is prolonged, the number of batteries used can be reduced, and the risk of erroneous insertion of the battery is reduced, and the space for burning and cooking parts such as a grill can be effectively used.

Further, a pan bottom temperature detecting means for detecting a pan bottom temperature, an electromagnetic valve for opening and closing a fuel gas supply path, an ignition means, and the electromagnetic valve or the electromagnetic valve at the time of ignition according to the detected temperature of the pan bottom temperature detecting means. And at least one of combustion control means for controlling the ignition means.

[0013] Originally, the pan bottom temperature detecting means provided to prevent ignition during combustion in tempura cooking or the like becomes room temperature detecting means when a long time has elapsed after the use of the stove. In a low temperature environment where the temperature detected by the pan bottom temperature detecting means is 0 ° C or lower, it is clear that a long time has passed since the last use, and the load is driven even if the internal resistance of the battery itself or the solenoid valve that is the load increases. The ignition performance can be improved by making the time or drive voltage longer or higher according to the detected temperature. On the other hand, when the pot bottom temperature at the time of ignition is as high as 50 ° C. or higher, power saving can be achieved by shortening or lowering the load drive time and drive voltage according to the detected temperature.
Even if the actual room temperature is low, the fact that the pan bottom temperature at the time of ignition is high means that the grill has residual heat, so that the ignition conditions are good.

[0014] The combustion control means may include at least one of the solenoid valve and the ignition means at the next ignition according to at least one of the pot bottom temperature at the end of the previous combustion and the non-combustion continuation time from the end of the previous combustion. Is controlled. This allows the combustion control means to accurately estimate the room temperature at the time of ignition and the amount of residual heat remaining near the burner due to the previous combustion, thereby further reducing power consumption.

[0015] The combustion control means may be arranged such that when the temperature detected by the pan bottom temperature detecting means before or during ignition is equal to or higher than a predetermined temperature,
A control amount for at least one of the electromagnetic valve and the ignition means at the time of ignition is fixed. If the pan bottom temperature is still high immediately after the combustion, and if the pan bottom detection temperature exceeds 50 ° C. at the next ignition, for example, it is conceivable that the residual heat of the previous combustion remains. As described above, when the true room temperature is unknown or only low-precision estimation can be performed, reliable ignition can be performed by fixing the control amount for the solenoid valve or the ignition means at the time of ignition.

The combustion control means controls at least one of the forced adsorption time of the solenoid valve and the forced ignition time of the ignition means. Since the current ignition condition is estimated according to the room temperature before ignition and the forced adsorption time of the solenoid valve or the forced ignition time of the ignition means is controlled, the average time required for ignition can be reduced without impairing the ignition performance.

The firing control means controls at least one of a drive voltage and a drive current to the solenoid valve or the ignition means. Thus, when the power source is a battery, ignition performance is not impaired even when the battery voltage decreases.

Further, the combustion control means controls at least one of a forced suction continuation time of the solenoid valve after ignition detection by the ignition detection means and a forced ignition continuation time of the ignition means. Since the ignition stabilization time after ignition detection by the ignition detection means is appropriately set according to the room temperature before ignition, there is no danger of ignition failure, and the user does not need to repeat the ignition operation many times. Further, the average time required for ignition can be further reduced. Further, since the ignition discharge sound is also shortened, the trouble is reduced.

The combustion control means delays at least one of the drive start time of one or more solenoid valves and the drive start time of one or more ignition means by a predetermined time. By simultaneously changing the shift time according to the room temperature without simultaneously driving a strong load such as an ignition means or an inductive load such as an electromagnetic valve, it is possible to save power while minimizing the instantaneous drop of the power supply voltage. It can be ignited reliably.

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG.
This will be described with reference to FIG. Components having the same functions as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 differs from the conventional example only in the operation of the combustion control means 14. FIG. 2 shows the combustion control means 14.
2 shows an operation flowchart. First, at step 201, it is confirmed that the ignition operating means 1 is ON, and further at step 202, the pot bottom temperature detecting means 12 which is also a room temperature detecting means.
Make sure that the thermistor does not have an open or short fault. If the ignition operating means 1 is OFF or the pan bottom temperature detecting means 12 is out of order, the process immediately proceeds to step 203, and the supply of gas to the burner is forcibly shut off by controlling the solenoid valve 6 to be closed. At the same time, the mode shifts to the power down mode (step 204) and ends.

Next, at step 205, the pan bottom temperature TR is detected, and the ignition time T1 by the ignition means 7 and the forced adsorption time T2 of the solenoid valve 6 are determined at steps 206 to 210. As shown in FIG. 3, T1 and T2 are

[0023]

(Equation 1)

Is set. In steps 211 and 212, control is started to start driving of the ignition means 7 and forcibly attract, that is, open, the electromagnetic valve 6. This combustion control means 14
At least two independent timers are provided to determine the elapse of time T1 and T2. If T1 elapses in step 213, the driving of the ignition means 7 is stopped in step 214, and T2 elapses in step 215. Until the operation, the forced adsorption of the solenoid valve 6 is continued. In step 216, the ignition operation means 1 is operated until the time T2 elapses, and the ignition operation means 1 is turned off.
If the condition has been reached, the routine immediately proceeds to step 203, where the solenoid valve 6 is controlled to be closed.

On the other hand, if the forced adsorption time T2 has elapsed, after confirming that the ignition operating means 1 is ON in step 217, the ignition detection signal from the ignition detection means 10 must be input in step 218. Further, in step 219, it is confirmed that the thermistor of the pan bottom temperature detecting means 12 has not caused an open or short-circuit failure. Further, the pot bottom temperature TR is detected in step 220, and in steps 221 and 222, the forcible suction (opening control) of the solenoid valve 6 is continued until the detected temperature TR reaches 230 ° C., and the process returns to step 217. If the forced adsorption time T
After 2 elapses, the ignition operation means 1 is operated and turned off.
When the ignition has not been detected, or when the pan bottom temperature detecting means 12 has failed, the routine proceeds to step 203, where the solenoid valve 6 is controlled to be closed. Then, also when the pot bottom temperature exceeds 230 ° C., the solenoid valve 6 is controlled to be closed in step 203 in the same manner as described above.

Next, the operation and operation will be described. The difference from the conventional example is that the pan bottom temperature detecting means 12 before ignition is also used as the room temperature detecting means, and the detection result is reflected in the ignition control amount. When the temperature detected by the pan bottom temperature detecting means before ignition is low, it is clear that a long time has passed since the last use, and it can be considered that a temperature close to room temperature is detected. At least in a predetermined temperature range,
If the pot bottom temperature before ignition is high, it is easy to ignite,
On the contrary, it is difficult to ignite. Even if the actual room temperature is low, the fact that the pan bottom temperature at the time of ignition is high means that the grill has residual heat, so that the ignition conditions are good. Therefore, in a situation where ignition is easy, the ignition time and the solenoid valve adsorption time can be shortened to save power without impairing the ignition performance.

If the detected temperature is too high or too low, the ignition condition is unknown, so that it is not necessary to waste power by saturating at a predetermined value.
In particular, when the power source is a battery, the life is long, and the frequency of battery replacement by the user can be reduced. With longer battery life,
This also leads to a reduction in the number of batteries used, which reduces the risk of incorrect battery insertion, and makes it possible to make effective use of the space in the grill and other combustion cooking parts.

Although the pan bottom temperature detecting means before ignition is also used as the room temperature detecting means, individual room temperature detecting means may be provided to set the ignition time and the electromagnetic valve adsorption time from the room temperature at the time of ignition. . The mounting position of the room temperature detecting means is not limited to the vicinity of the burner, but may be provided, for example, in a gas pipe to detect the temperature of the gas. It may be near a power supply or combustion control means. The ignition time and the solenoid valve adsorption time are not limited to the characteristic diagram of FIG. In particular, when the power source is a battery, it is generally known that the battery characteristics rapidly deteriorate at −5 ° C. or lower, and become irreversibly unusable at −10 ° C. or lower. In this case, a warning may be issued or the operation may be prohibited.

If the ignition operation of the user is monitored, and if the ignition fails and the ignition is manually retried within a short time, the ignition time and the solenoid valve adsorption time are extended by a predetermined time. Therefore, a learning unit for further correction may be provided.

When the electromagnetic valve 6 and the ignition means 7 are driven by pulse width modulation (PWM), the ON duty and the oscillation frequency of the output pulse may be controlled.

(Embodiment 2) FIG. 4 is a graph showing the transition of the pot bottom temperature for explaining the operation of Embodiment 2 of the present invention, and FIG. 5 is a flowchart of the combustion control means during non-combustion. The difference from the first embodiment lies in the method of estimating the pot bottom temperature or the room temperature for setting the ignition condition. In FIG.
Although the pan bottom temperature rises by the first ignition, returning the push button of the ignition operating means 1 terminates the combustion and indicates that the pan bottom temperature approaches room temperature. Also, the second ignition raises the pot bottom temperature again. In FIG. 5, the combustion control means controls the closing of the electromagnetic valve 6 when the combustion is stopped, and at the same time, detects the pan bottom temperature TRe (steps 301 and 302).
The non-combustion time tx is activated only for the time measurement start, and the power down mode is entered (steps 303 and 304).
Thereafter, only the non-combustion time tx is measured in the power saving state.

Next, at step 305, when the user presses the push button of the ignition operating means 1, the key-on wake-up function of the microcomputer operates, and the microcomputer returns to the high-speed operation mode. Detect. In step 307, the room temperature T0 is estimated from the pot bottom temperature TRe at the end of the previous time, the pan bottom temperature TRs at the time of reignition, and the non-combustion continuation time tx, and the ignition time and the solenoid valve adsorption time are set to perform the ignition operation.

Assuming that there is no replacement of a pot having a large temperature difference between the end of combustion and re-ignition, the pan bottom temperature TR from the end of combustion draws a temperature change curve of a primary delay system. That is, assuming that the combustion end time is t = 0, TR = (TRe−T0) · (1−exp (−t / P)) + T0 where P is a constant, and TR at t = tx at the time of reignition.
= TRs is substituted, and if it is transformed, T0 = (TRs−TRe · (1-exp (−t / P)) / exp
The room temperature T0 can be estimated as (-tx / P). Then, as in Example 1,
Based on the estimated room temperature T0, ignition time T1 and solenoid valve adsorption time T2
, Flexible ignition control according to the room temperature can be performed. That is, since the combustion control means can accurately estimate the room temperature at the time of ignition, further power saving can be achieved.

Here, the room temperature T0 is estimated from the pot bottom temperature TRe at the end of the previous time, the pot bottom temperature TRs at the time of re-ignition, and the non-combustion continuation time tx, but a temperature drop gradient at the end of combustion or before re-ignition may be used. . The pot bottom temperature in the non-combustion state may be detected intermittently (for example, every two hours), and the lowest value or the latest value may be regarded as room temperature. In setting the ignition time T1 and the solenoid valve adsorption time T2, when the non-combustion continuation time tx is shorter than a predetermined time, or when the difference between the re-ignition pot bottom temperature TRs and the estimated room temperature T0 is larger than the predetermined temperature. And ignition time T1 and solenoid valve adsorption time T2 to maintain ignition performance.
May be immobilized. A calendar and a timer for measuring the current time may be provided, and correction may be made so that the room temperature decreases from midnight to early morning in winter.

(Embodiment 3) FIG. 6 is a block diagram of a combustion cooking appliance according to Embodiment 3 of the present invention. The difference from the first embodiment is that the operation of the combustion control means 15 and the solenoid valve 6 and the ignition means 7
In that a variable voltage regulator 16 for varying the supply voltage for driving the power supply is provided. Note that components having the same functions as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. The variable voltage regulator 16 changes the output voltage VO to 1.5 V according to the output signal from the combustion control means 15.
This is a step-up / step-down DC / DC converter capable of continuously changing ３3 V or setting it to 0 V (shutdown).

FIG. 7 shows an operation flowchart of the combustion control means 15. First, at step 401, the ignition operation means 1
N is confirmed, and further, in step 402, it is confirmed that the thermistor of the pan bottom temperature detecting means 12 does not cause an open / short circuit failure. If the ignition operating means 1 is OFF or the pan bottom temperature detecting means 12 is out of order, the process immediately proceeds to step 403, where the output voltage V0 of the variable voltage regulator 16 is set to 0V, and
At step 4, the solenoid valve 6 is controlled to be closed to forcibly cut off the gas supply and to shift to the power down mode (step 40).
5) End.

Next, the pot bottom temperature TR is detected in step 406, and the load drive voltage V0 for the solenoid valve 6 and the ignition means 7 at the time of ignition is determined in steps 407 to 411. As shown in FIG. 8, V0 is

[0038]

(Equation 2)

Is set. Next, steps 412 to 415
Then, the ignition time T1 is set, the driving of the ignition means 7 is started,
Forcible suction time T2 of the solenoid valve 6 is set, and the forced suction, that is, the opening control of the solenoid valve 6, is started. Here, T1 and T2 are fixed values such as T1 = 10 seconds and T2 = 12 seconds (T1 <
T2) is set. The combustion control means 15 includes T1, T
At least two independent timers are provided to determine the passage of time 2. If T1 has elapsed in step 416, the ignition means 7 is stopped in step 417,
Until T2 elapses in step 418, the forcible suction of the solenoid valve 6 continues. If the ignition operation means 1 is operated and turned off before T2 elapses in step 419, the supply of the load drive voltage V0 is immediately stopped, the solenoid valve 6 is controlled to close, and the mode shifts to the power down mode. (Step 4
03-405) End.

On the other hand, if the forcible adsorption time T2 has elapsed, it is confirmed in step 420 that the ignition operating means 1 is ON, and in step 421, the ignition detection signal from the ignition detection means 10 has been input. Then, in step 422, it is confirmed that the thermistor of the pan bottom temperature detecting means 12 has not caused an open or short failure. Further, in step 423, the pan bottom temperature TR is detected, and in steps 424 to 426, unless the detected temperature TR reaches 230 ° C., the forcible adsorption (opening control) of the solenoid valve 6 is performed by the load driving voltage V0 = 1.5 (V ) And continue
Return to step 420. If the ignition operation means 1 has been operated to be turned off after the forced adsorption time T2 has elapsed, if ignition has not been detected, or if the pan bottom temperature detection means 12 has failed, the routine proceeds to step 403, where the solenoid valve 6 Is controlled to be closed. Also when the pot bottom temperature exceeds 230 ° C., the supply of the load drive voltage VO is stopped at step 403, the solenoid valve 6 is controlled to be closed, and the process shifts to the power down mode, thus ending.

In the above configuration, the pan bottom temperature TR before ignition
The load driving voltage V0 is set in accordance with the condition (1), so that ignition performance is not degraded at low temperatures, and efficient and reliable ignition can be performed. In addition, there is no such a problem that the battery voltage temporarily drops when the load such as the ignition means 7 and the solenoid valve 6 is driven, and the combustion control means 15 which is a microcomputer is reset.

Here, the load drive voltage V0 is controlled in accordance with the pan bottom temperature TR before ignition, but may be controlled by a load current. The drive voltage and current of the solenoid valve 6 and the ignition means 7 may be individually controlled. Of course, it may be combined with the control of the ignition time and the solenoid valve adsorption time shown in the first and second embodiments. For example, if the ignition time and the like are increased while the current flowing to the load at low temperatures is reduced, power saving can be achieved without impairing the ignition performance.

(Embodiment 4) A combustion cooking appliance according to Embodiment 4 of the present invention will be described with reference to FIGS. The only difference from the first embodiment is the operation of the combustion control means. Example 1
The components having the same functions as are given the same reference numerals,
Description is omitted.

FIG. 9 shows an operation flowchart of the combustion control means. First, at step 501, it is confirmed that the ignition operating means 1 is ON, and at steps 502, 503, the drive of the ignition means 7 is started, and the control for forcibly adsorbing the electromagnetic valve 6, that is, opening is started. In steps 504 to 506, it is determined whether or not the ignition is detected within 10 seconds.
At 7, it is confirmed that the thermistor of the pan bottom temperature detecting means 12 has not caused an open or short-circuit failure. If the ignition operation means 1 is OFF (steps 501, 5
06) or after 10 seconds of non-ignition continuation (step 50)
5) If the bottom temperature detecting means 12 is out of order (step 5)
07) immediately proceeds to step 508, controls the solenoid valve 6 to close to forcibly cut off gas supply, shifts to the power down mode (step 509), and ends.

If ignition is detected within 10 seconds from the start of the ignition operation, the pot bottom temperature TR is detected in step 510, and the ignition continuation time T3 after ignition and the electromagnetic valve adsorption time T4 after ignition are detected.
Are determined in steps 511 to 515. As shown in FIG. 10, T3 and T4 are:

[0046]

(Equation 3)

Is set. Next, if T3 has elapsed in step 516, the driving of the ignition means 7 is stopped in step 517, and the forced suction of the solenoid valve 6 continues until T4 has elapsed in step 518. If it is determined in step 519 that the ignition operation means 1 has been operated and turned off before the elapse of T4, the process immediately proceeds to step 508 to control the solenoid valve 6 to be closed. On the other hand, if the solenoid valve forced adsorption time T4 after ignition has elapsed, the ignition operation means 1 is turned on in step 520.
Then, in step 521, it is confirmed that the ignition detection signal from the ignition detection means 10 has been input, and further, in step 522, the thermistor of the pan bottom temperature detection means 12 has not caused an open or short failure. Make sure that

Further, in step 523, the pan bottom temperature TR is detected, and in steps 524 to 525, the detected temperature TR is detected.
As long as the temperature does not reach 230 ° C., the forcible suction (opening control) of the solenoid valve 6 is continued, and the process returns to step 520. If the solenoid valve forced adsorption time T4 after ignition has elapsed, the ignition operation means 1
Is turned off, ignition is not detected, or if the pan bottom temperature detecting means 12 is out of order, the process proceeds to step 508 to control the solenoid valve 6 to be closed. When the pot bottom temperature exceeds 230 ° C., the solenoid valve 6 is controlled to be closed in step 508 in the same manner as described above.

In the above configuration, the ignition stabilization time after ignition detection by the ignition detection means is appropriately estimated in accordance with the room temperature and is automatically controlled, so that more reliable ignition can be performed more efficiently.

(Embodiment 5) FIG. 11 is a block diagram of a combustion cooking appliance according to Embodiment 5 of the present invention. Here, components having the same functions as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The difference from the first embodiment is that two independent burners are provided, and accordingly, the ignition operating means 1, the solenoid valve 6,
That is, two ignition means 7 and two ignition detection means 10 are provided (indicated by a and b). The combustion control means 17
Also behaves differently. The output from the first ignition operation means 1a or the second ignition operation means 1b causes the combustion control means 17
The first ignition operating means 1a or the second ignition
The OR operation means 18 controls the open / close switch 2 by calculating the OR of the ignition operation means 1b. The pan bottom temperature detecting means 12 is mounted on only one side.

The shift time from the start of ignition of the first ignition means 7a to the start of forced adsorption of the first solenoid valve 6a or the second shift time
The shift time from the start of ignition of the ignition means 7b to the start of forced adsorption of the second electromagnetic valve 6b is Δt1, and the minimum shift time from the start of forced adsorption of the first electromagnetic valve 6a to the start of ignition of the second ignition means 7b. Alternatively, the minimum shift time from the start of the first electromagnetic valve 6b forcible adsorption to the start of the ignition of the second ignition means 7a is defined as Δt2. Further, the maximum time of each of the ignition time of the first ignition means 7a and the ignition time of the second ignition means 7b is T5.

As shown in FIG. 12A, the relationship between the pot bottom temperature TR (° C.) before ignition and the longest ignition time T5 (second) is as follows.

[0053]

(Equation 4)

Assume that Further, as shown in FIG. 12 (b), the shift times Δt1 and Δt2 from the pan bottom temperature TR (° C.) before the ignition.
(Seconds)

[0055]

(Equation 5)

Assume that The ignition operation will be described with reference to the time charts of FIGS. In FIG. 13, first, the first
It is assumed that the ignition operation means 1a is operated and the second ignition operation means 1b is operated after a while. The combustion control means 17 detects the pan bottom temperature TR in association with the first operation means 1a, and sets the longest ignition time T5 and the shift times Δt1 and Δt2 according to the above equation. Next, the first ignition means 7a is immediately driven and the first solenoid valve 6
The forced adsorption of a is started. As soon as the ignition detection signal is input from the first ignition detection means 10a, the driving of the first ignition means 7a is stopped without waiting for the passage of T5, and the state shifts to the normal combustion state. During normal combustion, the first solenoid valve 6a continues forced adsorption as it is.

On the other hand, if the time at which the second ignition operating means 1b is operated halfway from the driving of the first solenoid valve 6a exceeds Δt2, the driving of the second ignition means 7b is started immediately. , The driving of the second ignition means 7b is started after the shift time has elapsed. Further, after a delay of Δt1, forced suction of the second solenoid valve 6b is started. If the ignition detection signal is not input from the second ignition detection means 10b even after the elapse of T5 from the driving of the second ignition means 7b, the ignition operation is abandoned at that time, and the driving of the second ignition means 7b is stopped. This is a configuration in which forced adsorption of the second solenoid valve 6b is stopped.

Here, an example in which the first ignition operation is performed first has been described. However, even if the second ignition operation is performed first, the pan bottom temperature TR is detected before the second ignition control. T5, Δt1,
Needless to say, Δt2 is set.

Next, a time chart in the case where the first ignition operation and the second ignition operation are performed simultaneously will be described with reference to FIG. First ignition operating means 1a and second ignition operating means 1
If the operations b are performed simultaneously, the first ignition control is given priority. In response to the first and second ignition operations, the pan bottom temperature TR is detected, and the longest ignition time T5, Δt1, Δt2 is set. Next, after a set delay of .DELTA.t1, .DELTA.t2, .DELTA.t1 from the start of driving of the first ignition means 7a, the first electromagnetic valve 6a forcible suction, the driving of the second ignition means 7b, and the second electromagnetic valve 6b Forced adsorption is performed. If ignition is detected by the first ignition detection means 10a before the elapse of T5 from the driving of the first ignition means 7a, the ignition operation is terminated and normal combustion is started. Similarly, the second ignition means 7b is driven from the second ignition means 7b until the lapse of T5.
If the ignition is detected by the ignition detection means 10b, the ignition operation is terminated and the normal combustion is started.

In the above configuration, the combustion control means 17
By changing the shift time according to the pan bottom temperature before ignition without simultaneously driving a strong load or an inductive load, it is possible to reliably ignite with low power consumption while minimizing an instantaneous decrease in power supply voltage.

[0061]

According to the present invention as described above, the following advantageous effects can be obtained.

(1) Since ignition control is reliably performed with the minimum necessary power without waste according to the room temperature, power saving can be achieved. In particular, when the power source is a battery, the life is long, and the frequency of battery replacement by the user can be reduced. As the service life of the battery is prolonged, the number of batteries used can be reduced, and the risk of erroneous insertion of the battery is reduced, and the space for burning and cooking parts such as a grill can be effectively used.

(2) The cost can be reduced by using the pan bottom temperature detecting means before ignition also as the room temperature detecting means. When the time from the end of the previous combustion is short and the detected temperature of the pot bottom before ignition is high, it is difficult to estimate the room temperature, but there is little inconvenience to setting the ignition conditions because the grill has residual heat.

(3) The room temperature at the time of ignition or the amount of residual heat remaining near the burner can be accurately estimated according to the pot bottom temperature at the end of the previous combustion or the non-combustion continuation time from the end of the previous combustion, so that further saving is possible. Electricity can be achieved.

(4) Even if the true room temperature is unknown or can only be estimated with low accuracy, reliable ignition can be achieved by fixing the control amount for the solenoid valve or the ignition means at the time of ignition.

(5) Since the current ignition condition is estimated according to the room temperature before ignition and the forced adsorption time of the solenoid valve or the forced ignition time of the ignition means is controlled, the average time required for ignition without impairing the ignition performance. Can be shortened.

(6) When the power source is a battery, the ignition performance is not impaired even if the battery voltage decreases.

(7) Since the ignition stabilization time after the detection of ignition is properly set according to the room temperature, there is no danger of ignition failure, and the user does not need to repeat the ignition operation many times. Further, the average time required for ignition can be further reduced. Further, since the ignition discharge sound is also shortened, the trouble is reduced.

(8) The instantaneous drop of the power supply voltage can be minimized by changing the shift time according to the room temperature without simultaneously driving a strong load such as an ignition means or an inductive load such as an electromagnetic valve. It is possible to reliably ignite with low power consumption while keeping it to a minimum.

[Brief description of the drawings]

FIG. 1 is a block diagram of a combustion cooking appliance according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating the operation of combustion control means in the cooking appliance.

FIG. 3 is a characteristic diagram showing an ignition control amount of combustion control means in the same cooking device.

FIG. 4 is a graph showing a change in the bottom temperature of the pot of the combustion cooking appliance according to the second embodiment of the present invention.

FIG. 5 is a flowchart for explaining the non-combustion operation of the combustion control means in the combustion cooking appliance.

FIG. 6 is a block diagram of a combustion cooking appliance according to a third embodiment of the present invention.

FIG. 7 is a flowchart for explaining the operation of the combustion control means in the cooking appliance.

FIG. 8 is a characteristic diagram showing an ignition control amount of a combustion control means in the cooking device.

FIG. 9 is a flowchart for explaining the operation of the combustion control means in the combustion cooking appliance according to the fourth embodiment of the present invention.

FIG. 10 is a characteristic diagram showing an ignition control amount of combustion control means in the same cooking device.

FIG. 11 is a block diagram of a burning cooker according to a fifth embodiment of the present invention.

FIGS. 12 (a) and (b) are characteristic diagrams showing ignition control amounts of combustion control means in the same cooking device.

FIG. 13 is a time chart showing an ignition operation of combustion control means in the cooking appliance.

FIG. 14 is a time chart showing an ignition operation of combustion control means in the cooking appliance.

FIG. 15 is a configuration diagram of a conventional combustion cooking appliance.

FIG. 16 is a block diagram of the conventional cooking device.

FIG. 17 is a flowchart for explaining the operation of combustion control means in the conventional combustion cooking appliance.

FIG. 18 is a time chart showing an ignition operation of combustion control means in the conventional cooking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ignition operation means 2 On / off switch 5 Battery 6 Solenoid valve 7 Ignition means 10 Ignition detection means 12 Pot bottom temperature detection means (room temperature detection means) 14 Combustion control means

Claims (8)

[Claims] 1. A room temperature detecting means for detecting a room temperature, a solenoid valve for opening and closing a fuel gas supply path, an ignition means, and the electromagnetic valve or the ignition means at the time of ignition according to a temperature detected by the room temperature detecting means. And combustion control means for controlling at least one of the above. 2. A pan bottom temperature detecting means for detecting a pan bottom temperature,
An electromagnetic valve for opening and closing a fuel gas supply path, ignition means, and combustion control means for controlling at least one of the electromagnetic valve or the ignition means at the time of ignition according to the temperature detected by the pan bottom temperature detection means. Combustion cookware equipped. 3. The combustion control means according to at least one of the pot bottom temperature at the end of the previous combustion and the non-combustion continuation time from the end of the previous combustion, at least one of the solenoid valve and the ignition means at the next ignition. 3. The cooking appliance according to claim 2, wherein one of them is controlled. 4. The combustion control means fixes a control amount for at least one of the solenoid valve and the ignition means at the time of ignition when the temperature detected by the pan bottom temperature detection means before or during ignition is equal to or higher than a predetermined temperature. The cooking appliance according to claim 2 or 3, wherein 5. The cooking appliance according to claim 1, wherein the combustion control means controls at least one of a forced suction time of the solenoid valve and a forced ignition time of the ignition means. 6. The cooking appliance according to claim 1, wherein the combustion control means controls at least one of a drive voltage and a drive current to the solenoid valve or the ignition means. 7. A combustion control means for controlling at least one of a forced adsorption continuation time of the solenoid valve after ignition detection by the ignition detection means and a forced ignition continuation time of the ignition means. The cooking device according to claim 1. 8. The combustion control means delays at least one of a drive start time of one or more solenoid valves and a drive start time of one or more ignition means by a predetermined time. 8. The burning cooker according to any one of items 7 to 7.