JP3636238B2 - Combustion equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combustion apparatus.
[0002]
[Prior art]
A gas burner that is supplied with fuel gas and is ignited and burned by an ignition means, a thermocouple that is burned by the combustion flame of the gas burner and outputs a thermoelectromotive force, an ignition confirmation lamp for confirming ignition, and a thermocouple during ignition 2. Description of the Related Art Conventionally, a combustion apparatus having a controller that turns on the ignition confirmation lamp when a couple outputs a thermoelectromotive force of an ignition detection level (for example, 2.8 mV) or higher is known.
[0003]
[Problems to be solved by the invention]
In the conventional combustion apparatus described above, even if the gas burner is extinguished, immediately after extinguishing, the thermocouple outputs a thermoelectromotive force exceeding the ignition detection level due to residual heat, and early (for example, within 5 seconds) after extinguishing the fire. ), The ignition confirmation lamp continues to be lit until the thermoelectromotive force drops below the ignition detection level even if a mis-ignition is performed.
[0004]
Therefore, a combustion apparatus that does not light the ignition lamp even if the thermoelectromotive force is equal to or higher than the ignition detection level for several seconds after the ignition operation can be considered, but there is a problem that lighting is delayed by that amount.
[0005]
An object of the present invention is to provide a combustion device that can prevent an ignition check lamp from being erroneously turned on, and that an ignition lamp is turned on early when ignition occurs.
[0006]
[Means for Solving the Problems]
  In order to solve the above problems, the present invention employs the following configuration.
(1) A gas burner that is supplied with fuel gas and is ignited and burned by ignition means, a thermocouple that is arranged in the vicinity of the gas burner and outputs a thermoelectromotive force corresponding to the heat receiving temperature, and an ignition confirmation lamp for confirming ignition And a controller for determining whether to turn on or off the ignition confirmation lamp based on the thermoelectromotive force output from the thermocouple, a predetermined time has passed since the previous combustion stop.During normal ignitionWhen the thermoelectromotive force exceeds the ignition detection level, the controller turns on the ignition confirmation lamp and is within a predetermined time from the previous combustion stop.When reignitingWhen the gradient of the thermoelectromotive force becomes positive, the controller turns on the ignition confirmation lamp.
[0007]
(2) A gas burner supplied with fuel gas and ignited and burned by ignition means, a thermocouple arranged near the gas burner and outputting a thermoelectromotive force corresponding to the heat receiving temperature, and an ignition confirmation lamp for confirming ignition And a controller that determines whether to turn on or off the ignition confirmation lamp based on the thermoelectromotive force output from the thermocouple,pointDuring normal ignition in which the thermoelectromotive force at the time of fire is less than a predetermined value, when the thermoelectromotive force is equal to or higher than the ignition detection level, the controller turns on the ignition confirmation lamp,pointAt the time of reignition when the thermoelectromotive force at the time of fire is a predetermined value or more, the gradient of the thermoelectromotive force is positive.BecomeAnd the controller turns on the ignition confirmation lamp.
[0008]
(3) A gas burner supplied with fuel gas and ignited and burned by ignition means, a thermocouple arranged in the vicinity of the gas burner and outputting a thermoelectromotive force corresponding to the heat receiving temperature, and an ignition confirmation lamp for confirming ignition When,PreviousThermoelectromotive force output from thermocoupleOn the basis of the,The ignition confirmation lampDetermine whether to turn on or offA combustion apparatus having a controller;During normal ignition that exceeds a predetermined time from the previous combustion stop, when the thermoelectromotive force exceeds the ignition detection level, the controller turns on the ignition confirmation lamp and restarts within a predetermined time from the previous combustion stop. At the time of ignition, the controller turns on the ignition confirmation lamp when the gradient of the thermoelectromotive force becomes positive and the thermoelectromotive force is equal to or higher than the ignition detection level.
(4) A gas burner to which fuel gas is supplied and ignited and burned by ignition means, a thermocouple that is arranged in the vicinity of the gas burner and outputs a thermoelectromotive force corresponding to the heat receiving temperature, and an ignition confirmation lamp for confirming ignition And a controller that determines whether to turn on or off the ignition confirmation lamp based on the thermoelectromotive force output from the thermocouple, and at the time of normal ignition when the thermoelectromotive force at the time of ignition is less than a predetermined value When the thermoelectromotive force exceeds the ignition detection level, the controller turns on the ignition confirmation lamp, and during reignition when the thermoelectromotive force at the time of ignition is a predetermined value or more, the gradient of the thermoelectromotive force is positive. When the thermoelectromotive force is equal to or higher than the ignition detection level, the controller turns on the ignition confirmation lamp.
(5) A gas burner that is supplied with fuel gas and is ignited and burned by ignition means, a thermocouple that is arranged near the gas burner and outputs a thermoelectromotive force corresponding to the heat receiving temperature, and an ignition confirmation lamp for confirming ignition And a controller that turns on the ignition confirmation lamp when a thermoelectromotive force output from the thermocouple is equal to or higher than an ignition detection level at the time of ignition, wherein the controller stops the combustion of the gas burner. Then, the ignition detection level is raised to a second threshold value that is higher than the thermoelectromotive force output from the thermocouple during combustion, and the ignition detection level is increased from the second threshold value to a predetermined pattern corresponding to the elapsed time from the stop of combustion. To reduce to the first threshold.
[0014]
[Operation and effect of the invention]
[About claim 1]
  When a long time has passed since the combustion stopped, the thermocouple has cooled, and the thermoelectromotive force output from the thermocouple is substantially zero.
  It has exceeded the predetermined time since the previous combustion stopRucoWhen the gas burner is ignited by ignition means during yield (normal ignition), the thermocouple is heated by the combustion flame, so that the thermoelectromotive force output from the thermocouple increases (positive gradient). During normal ignition, the controller turns on the ignition confirmation lamp when the thermoelectromotive force exceeds the ignition detection level.
[0015]
  Immediately after the combustion of the gas burner stops, the thermocouple outputs a thermoelectromotive force according to the residual heat, but the thermocouple cools down as time elapses from the combustion stop, so the slope of the thermoelectromotive force is negative (the slope is negative). ).
  Within a predetermined time since the previous combustion stopBurningWhen the gas burner is re-ignited by the ignition means immediately after the firing is stopped (at the time of re-ignition), the thermocouple is heated by the combustion flame, so that the thermoelectromotive force rises early (the gradient is positive). At the time of re-ignition, the controller turns on the ignition confirmation lamp when the gradient of the thermoelectromotive force becomes positive.
[0016]
  Immediately after the combustion of the gas burner is stopped, the time when the thermocouple outputs a high level of thermoelectromotive force according to the residual heat is within the specified time from the previous combustion stop.Togetheris there.
  By distinguishing this timing, it is possible to reliably distinguish between reignition and normal ignition, so that it is possible to reliably prevent erroneous lighting of the ignition confirmation lamp during reignition.
[0017]
[About claim 2]
  When a long time has passed since the combustion stopped, the thermocouple has cooled, and the thermoelectromotive force output from the thermocouple is substantially zero.
  pointWhen the gas burner is ignited by the ignition means during a cold (normal ignition) when the thermoelectromotive force at the time of fire is less than a predetermined value, the thermocouple is heated by the combustion flame, so the thermoelectromotive force output from the thermocouple increases ( Positive slope)The ThroughAt the time of normal ignition, the controller has a thermoelectromotive force exceeding the ignition detection level.And pointTurn on the fire check lamp.
[0018]
  Immediately after the combustion of the gas burner stops, the thermocouple outputs a thermoelectromotive force according to the residual heat, but the thermocouple cools down as time elapses from the combustion stop, so the slope of the thermoelectromotive force is negative (the slope is negative). ).
  pointWhen the gas burner is re-ignited by the ignition means immediately after the combustion is stopped (at the time of reignition) when the thermoelectromotive force at the time of fire is greater than or equal to a predetermined value, the thermocouple is heated by the combustion flame, so the thermoelectromotive force rises early Turns to positive). During re-ignition, the controller ensures that the thermoelectromotive force gradient is positiveBecomeTurn on the ignition check lamp.
[0019]
  The time when the thermocouple outputs a high-level thermoelectromotive force according to the residual heat immediately after the combustion of the gas burner is stoppedIs a pointThis is a case where the thermoelectromotive force at the time of fire is a predetermined value or more.
  By distinguishing this timing, it is possible to reliably distinguish between reignition and normal ignition, so that it is possible to reliably prevent erroneous lighting of the ignition confirmation lamp during reignition.
[0020]
[About claim 3]
  When a long time has passed since the combustion stopped, the thermocouple is cooled, and the thermoelectromotive force output from the thermocouple is substantially zero.
  When the gas burner is ignited by the ignition means during a cold time (normal ignition) that has exceeded a predetermined time since the previous stop of combustion, the thermocouple is heated by the combustion flame, so the thermoelectromotive force output from the thermocouple increases (positive) Gradient) and exceed the ignition detection level. During normal ignition, the controller turns on the ignition confirmation lamp when the thermoelectromotive force exceeds the ignition detection level.
  Immediately after the combustion of the gas burner stops, the thermocouple outputs a thermoelectromotive force according to the residual heat, but the thermocouple cools down as time elapses from the combustion stop, so the slope of the thermoelectromotive force is negative (the slope is negative). ).
  When the gas burner is re-ignited by the ignition means immediately after the stop of combustion within a predetermined time from the previous stop of combustion (at the time of re-ignition), the thermocouple is heated by the combustion flame, so the thermoelectromotive force rises early (the gradient is positive). ). At the time of re-ignition, the controller turns on the ignition confirmation lamp when the gradient of the thermoelectromotive force becomes positive and the thermoelectromotive force is equal to or higher than the ignition detection level.
  Immediately after the combustion of the gas burner is stopped, the time when the thermocouple outputs a high level electromotive force corresponding to the surplus is within a predetermined time from the previous combustion stop.
  By distinguishing this timing, it is possible to reliably distinguish between reignition and normal ignition, so that it is possible to reliably prevent erroneous lighting of the ignition confirmation lamp during reignition.
[About claim 4]
  When a long time has passed since the combustion stopped, the thermocouple is cooled, and the thermoelectromotive force output from the thermocouple is substantially zero.
  When the gas burner is ignited by the ignition means when the thermoelectromotive force at the time of ignition is less than a predetermined value (normal ignition), the thermocouple is heated by the combustion flame, so the thermoelectromotive force output from the thermocouple increases ( A positive gradient) and the ignition detection level is exceeded. During normal ignition, the controller turns on the ignition confirmation lamp when the thermoelectromotive force exceeds the ignition detection level.
  Immediately after the combustion of the gas burner stops, the thermocouple outputs a thermoelectromotive force according to the residual heat, but the thermocouple cools down as time elapses from the combustion stop, so the slope of the thermoelectromotive force is negative (the slope is negative). ).
  Immediately after stopping combustion (at the time of reignition) when the thermoelectromotive force at the time of ignition is over a predetermined value, if the gas burner is reignited by the ignition means, the thermocouple is heated by the combustion flame, so the thermoelectromotive force rises early (gradient Turns to positive). At the time of re-ignition, the controller turns on the ignition confirmation lamp when the gradient of the thermoelectromotive force becomes positive and the thermoelectromotive force is equal to or higher than the ignition detection level.
  Immediately after the combustion of the gas burner is stopped, the time when the thermocouple outputs a high level thermoelectromotive force corresponding to the surplus is when the thermoelectromotive force at the time of ignition is a predetermined value or more.
  By distinguishing this timing, it is possible to reliably distinguish between reignition and normal ignition, so that it is possible to reliably prevent erroneous lighting of the ignition confirmation lamp during reignition.
[About Claim 5]
  When a long time has elapsed since the previous combustion stop, the ignition detection level has converged to the normal first threshold value. The thermocouple is cold and the thermoelectromotive force output from the thermocouple is substantially zero.
  When the gas burner is ignited by the ignition means, the thermoelectromotive force output from the thermocouple increases and exceeds the first threshold value. The controller turns on the ignition confirmation lamp when the thermoelectromotive force becomes equal to or higher than the first threshold value.
  The thermoelectromotive force that is output when the gas burner stops burning due to wind or fire extinguishing operation is high due to residual heat, especially immediately after the combustion stops, the thermoelectromotive force exceeds the ignition detection level, and the level of the thermoelectromotive force during combustion It is.
  When the combustion of the gas burner stops, the controller raises the ignition detection level to a second threshold value that is higher than the thermoelectromotive force output from the thermocouple during combustion, and the ignition detection level is set to the second threshold value corresponding to the elapsed time from the combustion stop. To a first threshold value in a predetermined pattern. For this reason, if reignition is performed immediately after the gas burner is extinguished, the ignition confirmation lamp will turn on simultaneously with the reignition operation. Do not light.
  At the time of reignition, when the gas burner is ignited by the ignition means, the thermocouple is heated by the combustion flame, so that the thermoelectromotive force gradually decreases and starts to increase.
  When the thermoelectromotive force output from the thermocouple exceeds the ignition detection level, the controller turns on the ignition confirmation lamp.
  For this reason, erroneous lighting of the ignition confirmation lamp during re-ignition can be reliably prevented.
[0032]
DETAILED DESCRIPTION OF THE INVENTION
  First Embodiment of the Invention (Claims)3, 4Will be described with reference to FIGS.
  The gas table A shown in the figure is an ignition for igniting the right stove 1, the left stove 2, and the grill 3, and the right stove 1, the left stove 2, and the grill 3 that are supplied with fuel gas and burned. Means 4, thermocouples 51, 52, 53 for outputting thermoelectromotive force TC, ignition confirmation lamps 61, 62, 63 for confirming ignition, lighting / extinguishing of ignition confirmation lamps 61, 62, 63 are controlled. And a combustion controller 7.
[0033]
In addition, 101, 201, 301 are point / fire extinguishing buttons, 102, 202, 302 are heating power adjusting levers, 103, 203, 303 are micro switches that are closed by pressing the point / fire extinguishing buttons 101, 201, 301.
[0034]
The right stove 1 has an H burner 11 having a gas consumption of 4100 kcal / h and is installed on the right side of the figure. An ignition electrode 41 that performs spark discharge and a thermocouple 51 that is beaten by the combustion flame 10 and generates a thermoelectromotive force TC are arranged facing the gas ejection flame opening of the H burner 11, and a temperature sensing cylinder that incorporates the thermistor 12. 13 is arranged so that its upper surface 131 is pressed against the bottom surface 151 of the cooking container 15 such as a pan placed on the virtues 14 (see FIG. 2).
[0035]
Further, 111 is a safety valve, 112 is a gas pipe, 113 is held by a push-push mechanism equipped with a heart cam (not shown) by a pressing operation of the point / fire extinguishing button 101, and is closed by a re-pressing operation. The main valve.
[0036]
The left stove 2 has an M burner 21 having a gas consumption of 2300 kcal / h, and is installed on the left side of the figure. Further, an ignition electrode 42 that performs spark discharge, and a thermocouple 52 that is beaten by the combustion flame 20 and generates a thermoelectromotive force TC are arranged facing the gas ejection flame opening of the M burner 21, A temperature sensing cylinder 23 with a built-in thermistor 22 is arranged so that its upper surface 231 is pressed against the bottom surface 251 of a cooking container 25 such as a pan placed on the virtues 24.
[0037]
In addition, 211 is a safety valve arranged in the gas pipe 212, and 214 is a temperature arranged in the main gas pipe 215 among the main gas pipe 215 and the sub gas pipe 216 branched from the gas pipe 212. The regulating solenoid valve 213 is a main valve disposed in the gas pipe 212 as in the right stove 1 (see FIG. 2).
[0038]
The grill 3 has a porous combustion plate type grill burner 31 having a gas consumption of 1950 kcal / h, and is disposed in a grill warehouse 30 in the center of the figure. Further, an ignition electrode 43 that performs spark discharge and a thermocouple 53 that is burned by a combustion flame and generates a thermoelectromotive force TC are arranged facing the porous combustion plate of the grill burner 31. Reference numerals 311 and 313 denote a safety valve and a main valve disposed in the gas pipeline 312 (see FIG. 2).
[0039]
The ignition means 4 includes an igniter circuit (not shown) that generates a high voltage when the microswitches 103, 203, and 303 are switched from OFF to ON, and ignition electrodes 41, 42 that perform a spark discharge when the high voltage is applied. 43.
[0040]
The operation panel 8 also shown in FIG. 3 is formed of a plastic plate and includes the following display unit and keys for controlling the combustion of the M burner 21 of the left stove 2.
Specifically, a seven-segment green LED 811 for digitally displaying the cooking temperature and cooking time, keys 812 and 813 for setting the cooking temperature and cooking time, and suitable for cooking such as a tempura, within a range of 130 ° C. to 220 ° C. Fried food cooking mode key 814 to keep the set constant temperature, boiled cooking mode key 815 suitable for boiled cooking and boiled cooking mode key 815, boiled cooking mode key 816 suitable for grilled food and kept at a constant temperature of 270 ° C. A key 817 for a water heater mode that is suitable for boiling water and that heats until the water boils, a key 818 for a timer cut mode that automatically extinguishes when a set time has elapsed, a key 819 that is pressed to cancel these modes, and these keys LEDs 824, 825, and 826 that are arranged on the upper left side of the LED and emit light when the above modes are selected. And a 827, 828.
[0041]
The seven-segment green LED 811 and the LEDs 824, 825, 826, 827, and 828 for each mode are disposed on the back surface of the operation panel 8, and the plastic plates at the corresponding positions are formed to have translucency. .
[0042]
The ignition confirmation lamps 61, 62, and 63 are high-intensity LEDs (red) and are disposed above the point / fire extinguishing buttons 101, 201, and 301. The light-transmitting high fire mark, medium fire mark, and fish mark Arranged on the back side.
[0043]
Next, the operation of the gas table A will be described based on the graph of FIG. 4 and the flowchart of FIG.
For example, when the user presses the point / fire extinguishing button 201 on the left stove 2 at the elapsed time 901 (YES in step s1), the main valve 213 and the safety valve 211 are linked with the point / fire extinguishing button 201. The valve is opened by a member (not shown), the micro switch 203 is closed, and the combustion controller 7 opens the valve by energizing the safety valve 211 for a predetermined time (flowing suction current to the suction coil). Since the high voltage is applied to the ignition electrode 42, the left stove 2 ignites and starts combustion. The same applies when the right stove 1 and grill 3 are burned.
[0044]
In this case, since the thermoelectromotive force TC of the thermocouple 52 is less than a predetermined value (eg, 2.8 mV) when the point / fire extinguishing button 201 is pressed (NO in step s2), the microcomputer of the combustion controller 7 is It is determined that the ignition is normal.
[0045]
Since the thermocouple 52 is beaten by the combustion flame 20, the thermoelectromotive force TC gradually increases, and when the thermoelectromotive force TC becomes equal to or higher than the ignition detection level (2.8 mV) at the elapsed time 902 (YES in step s3). ) The combustion controller 7 stops the operation of the igniter circuit, continues to energize the safety valve 211 even after a predetermined time has elapsed (flows a holding current through the holding coil), and energizes the ignition check lamp 62 to emit red light ( Step s6).
[0046]
Then, among the keys 814, 815, 816, 817, 818, and 819 for selecting the cooking mode, for example, when the key 814 for the fried food cooking mode is pressed, the LED 824 emits red light, indicating that this mode is selected. The cooking temperature when using the previous deep-fried food cooking mode is displayed on the seven-segment green LED 811 (digital display). When the cooking temperature is lowered with respect to the displayed temperature, the key 812 is pressed, and when the cooking temperature is raised, the key 813 is pressed to display the cooking temperature on the seven-segment green LED 811. Thereby, fried food cooking is started.
[0047]
During cooking, when the M burner 21 of the left stove 2 disappears due to wind or squirting, and the thermoelectromotive force TC of the thermocouple 52 becomes less than the ignition detection level (2.8 mV) (YES in step s7). The combustion controller 7 stops energizing the safety valve 211 (stops the holding current), stops the gas supply to the M burner 21, and turns off the ignition confirmation lamp 62 (step s8).
[0048]
When the fire extinguishing operation is performed by pressing the point / fire extinguishing button 201 again at the elapsed time 903 (YES in step s7), the main valve 213 is closed, the micro switch 203 is opened, and the safety valve 211 is de-energized. The left cooking stove 2 is extinguished and the ignition confirmation lamp 62 is forcibly stopped so that the ignition confirmation lamp 62 is extinguished (step s8).
[0049]
When reignition is not performed, the thermoelectromotive force TC of the thermocouple 52 decreases with time as shown by the two-dot chain line in the figure (see FIG. 4).
However, when the user presses the point / fire extinguishing button 201 at the elapsed time 904 and performs a reignition operation to resume fried food cooking or to perform another cooking (YES in step s1), the main valve 213 opens. At the same time, the micro switch 203 is closed, and the combustion controller 7 energizes the safety valve 211 for a predetermined time to hold the valve open, and a high voltage is applied to the ignition electrode 42. 2 ignites and starts combustion.
[0050]
As described above, when the thermoelectromotive force TC of the thermocouple 52 is equal to or greater than a predetermined value (for example, 2.8 mV) immediately after the fire extinguishing and the point / fire extinguishing button 201 is pressed, (YES in step s2), The microcomputer of the combustion controller 7 determines re-ignition.
[0051]
Since the thermocouple 52 is beaten by the combustion flame 20, as shown by the solid line in the figure, the decrease in the thermoelectromotive force TC gradually becomes gradual and soon begins to increase (see FIG. 4).
At the elapsed time 905, it is detected that the gradient K of thermoelectromotive force (measured by the following formula) has turned positive (YES in step s4), and is equal to or higher than the ignition detection level (2.8 mV) ( If YES in step s5), the combustion controller 7 stops the operation of the igniter circuit, continues energizing the safety valve 211 even after a predetermined time has elapsed, and energizes the ignition check lamp 62 to emit red light (step s6).
Gradient K = (V₂-V₁) / (T₂-T₁)
V₂= Current time t₂Thermoelectromotive force in
V₁= Time t₂Time t 100ms before₁Thermoelectromotive force in
[0052]
Next, advantages of the gas table A will be described.
The microcomputer of the combustion controller 7 performs normal ignition (time elapses from the previous fire extinguishing) when the thermoelectromotive force TC is less than a predetermined value (2.8 mV) during the ignition operation of the point / fire extinguishing buttons 101, 201, 301. And the ignition confirmation lamps 61, 62, 63 are turned on at the thermoelectromotive force TC ≧ ignition detection level (2.8 mV), and the thermoelectromotive force TC is equal to or higher than a predetermined value (2.8 mV). Is determined to be re-ignition (immediately after extinguishing), and the ignition confirmation lamps 61, 62, and 63 are turned on when the gradient K is positive and the thermoelectromotive force TC ≧ ignition detection level (2.8 mV).
For this reason, the gas table A has the following advantages.
[0053]
[A] Immediately after fire extinguishing (within several seconds), the ignition of the H burner 11, M burner 21, and grill burner 31 can be reliably detected at the time of re-ignition when the ignition / ignition button 101, 201, 301 is ignited. Incorrect lighting of the lamps 61, 62, 63 can be prevented.
[0054]
[A] During reignition, the gradient K is measured at intervals of 100 ms. Therefore, when the H burner 11, the M burner 21, and the grill burner 31 are ignited and the gradient K of the thermoelectromotive force becomes positive (however, the ignition detection level or more) Immediately, the ignition confirmation lamps 61, 62, 63 are turned on.
That is, since it is not the structure which delays lighting at the time of re-ignition (for example, 2 seconds), the unreasonable thing that it does not light immediately even if it ignites does not occur.
[0055]
[UReWhen ignition, the gradient of the thermoelectromotive force becomes positive (YES in step s4), and when the thermoelectromotive force is equal to or higher than the ignition detection level (YES in step s5), the combustion controller 7 lights the ignition confirmation lamp 62. Once lit, the combustion controller 7 continues to be lit while the thermoelectromotive force is equal to or higher than the ignition detection level (YES in step s7).
  For this reason, the ignition confirmation lamp 62 does not turn off even if it is burned for a long time or the heating power is weakened.
[0056]
[D〕pointSince it is determined whether the ignition is normal ignition or re-ignition based on the thermoelectromotive force TC detected during the ignition operation of the fire-extinguishing buttons 101, 201, 301, it is reliably determined whether or not it is re-ignition. I can do things.
[0057]
  Further, as shown in FIG. 6, the configuration may be such that step s5 in FIG. 5 is omitted and the process proceeds from YES in step s4 to step s6.2Corresponding).
  Further, as shown in FIG. 7, at the time of reignition, when 30 seconds elapses from the lighting of the ignition confirmation lamp, the control may be switched to the control of lighting at TC ≧ ignition detection level.4Corresponding).
[0058]
  Next, a second embodiment of the present invention (Reference example) Will be described based on the flowcharts of FIGS. 1 to 3 and FIG. 8.
  The gas table B shown in the drawing has the same mechanical structure as that of the gas table A, and is different only in lighting control of the ignition confirmation lamp (shown below) by the combustion controller 7.
[0059]
The operation of the gas table B will be described based on the flowchart of FIG.
For example, when the user presses the point / fire extinguishing button 201 on the left stove 2 (YES in step S1), the main valve 213 and the safety valve 211 are linked members (not shown) that are linked with the point / fire extinguishing button 201. And the micro switch 203 is closed, and the combustion controller 7 energizes the safety valve 211 for a predetermined time (flows the suction current to the suction coil), holds the valve open, and ignites. Since a high voltage is applied to the electrode 42, the left stove 2 ignites and starts combustion. The same applies when the right stove 1 and grill 3 are burned.
[0060]
In the case of normal ignition, the thermoelectromotive force TC of the thermocouple 52 is substantially zero.
In addition, when the user presses the point / fire extinguishing button 201 to perform reignition operation immediately after extinguishing, in order to resume cooking or perform another cooking, the thermoelectromotive force TC of the thermocouple 52 is at a high level (for example, 10 mV).
[0061]
In any case, when ignition is successful, the thermocouple 52 is struck by the combustion flame 20, so that the thermoelectromotive force TC gradually rises (YES in step S2), and the thermoelectromotive force TC becomes the ignition detection level (2 .8 mV) or more (YES in step S3).
[0062]
Therefore, the combustion controller 7 stops the operation of the igniter circuit, continues energization to the safety valve 211 even after a predetermined time has passed (flows a holding current through the holding coil), and supplies the ignition check lamp 62 with red light. (Step S4).
[0063]
Then, among the keys 814, 815, 816, 817, 818, and 819 for selecting the cooking mode, for example, when the key 814 for the fried food cooking mode is pressed, the LED 824 emits red light, indicating that this mode is selected. The cooking temperature when using the previous deep-fried food cooking mode is displayed on the seven-segment green LED 811 (digital display). When the cooking temperature is lowered with respect to the displayed temperature, the key 812 is pressed, and when the cooking temperature is raised, the key 813 is pressed to display the cooking temperature on the seven-segment green LED 811. Thereby, fried food cooking is started.
[0064]
During cooking, when the M burner 21 of the left stove 2 disappears due to wind or squirting, and the thermoelectromotive force TC of the thermocouple 52 becomes less than the ignition detection level (2.8 mV) (YES in step S5). The combustion controller 7 stops energization of the safety valve 211 (stops the holding current) to stop the gas supply to the M burner 21, and turns off the ignition confirmation lamp 62 (step S6).
[0065]
When the fire extinguishing operation is performed by pressing the point / fire extinguishing button 201 again (YES in step S5), the main valve 213 is closed, the micro switch 203 is opened, the safety valve 211 is de-energized, and the left stove 2 is turned on. While the fire is extinguished, the ignition confirmation lamp 62 is forcibly stopped from energizing, so the ignition confirmation lamp 62 is extinguished (step S6).
[0066]
Next, advantages of the gas table B will be described.
The microcomputer of the combustion controller 7 is configured to light up the ignition confirmation lamps 61, 62, and 63 when the gradient K is positive and the thermoelectromotive force TC ≧ ignition detection level (2.8 mV). For this reason, the gas table B has the following advantages.
[0067]
[E] Immediately after extinguishing (within several seconds), the ignition of the H burner 11, M burner 21, and grill burner 31 can be reliably detected at the time of re-ignition when the ignition / ignition button 101, 201, 301 is ignited. Incorrect lighting of the lamps 61, 62, 63 can be prevented. Further, since the discrimination between reignition and normal ignition is not performed, the control program can be simplified.
[0068]
[F] Since the gradient K is measured at intervals of 100 ms, when the H burner 11, the M burner 21, and the grill burner 31 are ignited and the gradient K of the thermoelectromotive force becomes positive (however, the ignition detection level or more) Confirmation lamps 61, 62, and 63 are lit.
That is, since it is not the structure which delays lighting at the time of re-ignition (for example, 2 seconds), the unreasonable thing that it does not light immediately even if it ignites does not occur.
[0069]
[Ki〕heatWhen the gradient of the electromotive force becomes positive (YES in step S2) and the thermoelectromotive force is equal to or higher than the ignition detection level (YES in step S3), the combustion controller 7 turns on the ignition confirmation lamp 62 and turns on once. Then, the combustion controller 7 keeps lighting while the thermoelectromotive force is equal to or higher than the ignition detection level (YES in step S5). For this reason, the ignition confirmation lamp 62 does not turn off even if it is burned for a long time or the heating power is weakened.
[0070]
In addition, as shown in FIG. 9, the structure which detects the positive gradient of the thermoelectromotive force TC and turns on the ignition confirmation lamp may be used (corresponding to claim 1).
[0071]
  Next, a third embodiment of the present invention (Reference example) Will be described based on the flowcharts of FIGS. 1 to 3 and FIG. 10.
  The gas table C shown in the figure has the same mechanical structure as that of the gas table A, and is different only in the lighting control of the ignition confirmation lamp by the combustion controller 7 (shown below).
[0072]
The operation of the gas table C will be described based on the flowchart of FIG.
For example, when the user presses the point / fire extinguishing button 201 on the left stove 2 (YES in step st1), the main valve 213 and the safety valve 211 are interlocking members (not shown) that are interlocked with the point / fire extinguishing button 201. And the micro switch 203 is closed, and the combustion controller 7 energizes the safety valve 211 for a predetermined time (flows the suction current to the suction coil), holds the valve open, and ignites. Since a high voltage is applied to the electrode 42, the left stove 2 ignites and starts combustion. The same applies when the right stove 1 and grill 3 are burned.
[0073]
In the case of normal ignition, the thermoelectromotive force TC of the thermocouple 52 is substantially zero.
In addition, when the user presses the point / fire extinguishing button 201 to perform reignition operation immediately after extinguishing, in order to resume cooking or perform another cooking, the thermoelectromotive force TC of the thermocouple 52 is at a high level (for example, 10 mV).
[0074]
In any case, if ignition is successful, the thermocouple 52 is struck by the combustion flame 20, and the thermoelectromotive force TC gradually increases (YES in step st2).
When the thermoelectromotive force TC is less than the ignition detection level (2.8 mV), the process loops from step st4 → step st5 → step st2.
[0075]
When the thermoelectromotive force TC becomes equal to or higher than the ignition detection level (YES in step st3), the combustion controller 7 stops the operation of the igniter circuit in step st6 and continues energizing the safety valve 211 even after a predetermined time has elapsed ( A holding current is passed through the holding coil), and the ignition check lamp 62 is energized to emit red light (maintain lighting).
[0076]
Since the timer has not expired for 30 seconds from the start of lighting, the process proceeds from step ST7 NO → step st8 → step st2 YES → step st3 YES → step st6. If the time is up, the process proceeds from YES to step st3 to step st6 in step st7.
[0077]
During cooking, if the M burner 21 of the left stove 2 disappears due to wind, squirting, etc., and the thermoelectromotive force TC of the thermocouple 52 becomes less than the ignition detection level (2.8 mV) (NO in step st3). The combustion controller 7 stops energizing the safety valve 211 (stops the holding current), stops the gas supply to the M burner 21, and turns off the ignition confirmation lamp 62 (step st4).
[0078]
Next, advantages of the gas table C will be described.
[K] Since K> 0 is determined in step st2, immediately after the extinguishing (within several seconds), at the time of re-ignition in which the point / fire extinguishing buttons 101, 201, 301 are ignited, the H burner 11, the M burner 21, and Since the ignition detection of the grill burner 31 can be reliably performed, it is possible to prevent the ignition confirmation lamps 61, 62, and 63 from being turned on erroneously.
[0079]
[K] Since the gradient K is measured at intervals of 100 ms, when the H burner 11, M burner 21, and grill burner 31 are ignited and the gradient K of the thermoelectromotive force becomes positive (however, the ignition detection level or more), the ignition is promptly performed. Confirmation lamps 61, 62, and 63 are lit.
That is, since it is not the structure which delays lighting at the time of re-ignition (for example, 2 seconds), the unreasonable thing that it does not light immediately even if it ignites does not occur.
[0080]
[Co〕heatElectromotive force gradient KButWhen 30 seconds (predetermined time) has elapsed since the positive ignition detection is performed, the control is changed to turn on the ignition confirmation lamps 61, 62, 63 at an ignition detection level or higher.
  For this reason, the ignition confirmation lamps 61, 62, and 63 are not extinguished even if they are burned for a long time or the heating power is weakened.
[0081]
  Next, a fourth embodiment of the present invention (claims)5Will be described based on FIG. 1, FIG. 2, FIG. 3, FIG. 11, and FIG.
  The mechanical configuration of the gas table D is the same as that of the gas table A.
  The operation of the gas table D will be described based on the graph of FIG. 11 and the flowchart of FIG.
[0082]
For example, when the user presses the point / fire extinguishing button 201 and performs a fire extinguishing operation during the combustion of the left stove 2 (step St1) (YES in step St2), the main valve 213 is closed and the micro switch 203 is closed. Is opened, the safety valve 211 is de-energized, and the left stove 2 is extinguished (elapsed time 920). The same applies to the right stove 1 and the grill 3.
[0083]
When the M burner 21 is extinguished by the fire extinguishing operation by the point / fire extinguishing button 201, the microcomputer of the combustion controller 7 has a second threshold value (for example, 6) higher than the maximum value of the thermoelectromotive force TC output by the thermocouple 52 during combustion. The ignition detection level is raised to 0.5 mV), and as shown by the broken line in FIG. 11, the ignition detection level is reduced corresponding to the elapsed time from the extinction (step St3).
[0084]
Then, in order to resume fried food cooking or to perform another cooking, the user presses the point / fire extinguishing button 201 on the left stove 2 at the elapsed time 921 (YES in step St4) and performs a reignition operation. As a result, the main valve 213 is opened, the micro switch 203 is closed, and the combustion controller 7 energizes the safety valve 211 for a predetermined time to keep the valve open, and the ignition electrode 42 is turned on. Since the voltage is applied, the left stove 2 re-ignites and resumes combustion.
[0085]
If reignition is not performed, the thermoelectromotive force TC of the thermocouple 52 decreases with time as shown by the two-dot chain line in the figure (see FIG. 11).
[0086]
Since the thermocouple 52 is beaten by the combustion flame 20, as shown by the solid line in the figure, the decrease in the thermoelectromotive force TC gradually becomes gradual and soon starts to increase (see FIG. 11). When it is detected that the thermoelectromotive force TC is equal to or higher than the ignition detection level at the elapsed time 922 (YES in step St5), the combustion controller 7 stops the operation of the igniter circuit and supplies the safety valve 211 to the safety valve 211 for a predetermined time. Energization is continued even after the elapse of time, and the ignition check lamp 62 is energized to emit red light (step St6).
[0087]
During combustion, when the M burner 21 of the left stove 2 disappears due to wind, spillover, etc., and the thermoelectromotive force TC of the thermocouple 52 falls below the ignition detection level (YES in step St7), the combustion controller 7 Stops energization of the safety valve 211 to stop the gas supply to the M burner 21 and turns off the ignition confirmation lamp 62 (step St8).
[0088]
Next, advantages of the gas table D will be described.
When the H burner 11, the M burner 21, and the grill burner 3 are extinguished by the fire extinguishing operation using the point / fire extinguishing buttons 101, 201, 301, the microcomputer of the combustion controller 7 causes the thermoelectromotive force TC output from the thermocouple 52 during combustion. The ignition detection level is raised to a second threshold value (6.5 mV) that is higher than the maximum value, and the ignition detection level is reduced corresponding to the elapsed time from extinguishing.
For this reason, the gas table D has the following advantages.
[0089]
[S] Since the ignition detection level is raised to the second threshold (6.5 mV) by the fire extinguishing operation with the point / fire extinguishing buttons 101, 201, 301, the ignition operation is performed for the point / fire extinguishing buttons 101, 201, 301 after the combustion is stopped. At the time of reignition, since the ignition detection of the H burner 11, the M burner 21, and the grill burner 31 can be reliably performed, it is possible to prevent the ignition confirmation lamps 61, 62, and 63 from being turned on erroneously.
[0090]
[G] If ignition is successful during re-ignition, the thermoelectromotive force TC ≧ ignition detection level is reached at an early stage, so that the ignition confirmation lamps 61, 62, 63 are quickly turned on.
In addition, since it is not the structure which delays lighting at the time of re-ignition (for example, for 2 seconds), it does not light up even if it is ignited and it does not light up immediately, and long-time combustion or large thermal power combustion does not occur.
[0091]
The present invention includes the following embodiments in addition to the above embodiments.
a. In the first embodiment, reignition is performed when the thermoelectromotive force TC at the time of ignition is equal to or higher than a predetermined value (2.8 mV) (step s2), but the process after the combustion is stopped by the fire extinguishing operation using the point / fire extinguishing button. Reignition may be performed when the time is within a predetermined time (for example, 20 seconds).
[0092]
b. The ignition detection level is not limited to 2.8 mV. For example, it may be changed within a range of 2.8 mV ± 1.3 mV in order to offset variations such as thermocouples.
[0093]
c. In the description of the first embodiment, the cooking mode is selected after the operation of the point / fire extinguishing button 201. However, after the cooking mode selection and the cooking temperature are set by pressing the cooking mode selection key and the setting key. It is also possible to start combustion by the point / fire extinguishing button 201. In this case, after the LED of the cooking selection key (for example, LED 824) is lit, the cooking temperature is set with the key 812 or the key 813 and displayed on the seven-segment green LED 811. To do.
[Brief description of the drawings]
FIG. 1 is a perspective view of a gas table according to each embodiment of the present invention.
FIG. 2 is an explanatory diagram of the structure of the gas table.
FIG. 3 is an enlarged view of a main part of the gas table.
FIG. 4 is a graph showing the relationship between elapsed time, thermoelectromotive force, and ignition detection level of the gas table according to the first embodiment.
FIG. 5 is a flowchart showing lighting control of an ignition confirmation lamp in the gas table according to the first embodiment.
FIG. 6 is a flowchart showing lighting control of an ignition confirmation lamp in a gas table according to a modification (No. 1) of the first embodiment.
FIG. 7 is a flowchart showing lighting control of an ignition confirmation lamp in a gas table according to a modification (No. 2) of the first embodiment.
FIG. 8 is a flowchart showing lighting control of an ignition confirmation lamp in the gas table according to the second embodiment.
FIG. 9 is a flowchart showing lighting control of an ignition confirmation lamp in a gas table according to a modification of the second embodiment.
FIG. 10 is a flowchart showing lighting control of an ignition confirmation lamp in a gas table according to a third embodiment.
FIG. 11 is a graph showing the relationship between elapsed time, thermoelectromotive force, and ignition detection level in the gas table according to the fourth example.
FIG. 12 is a flowchart showing lighting control of the ignition confirmation lamp in the gas table according to the fourth embodiment.
[Explanation of symbols]
A, B, C, D Gas table (combustion device)
4 ignition means
7 Combustion controller (controller)
11 H burner (gas burner)
21 M burner (gas burner)
31 Grill burner (gas burner)
51, 52, 53 Thermocouple (thermocouple)
61, 62, 63 Ignition confirmation lamp
TC Thermoelectromotive force

Claims (5)

A gas burner supplied with fuel gas and ignited and burned by ignition means;
A thermocouple arranged in the vicinity of the gas burner and outputting a thermoelectromotive force corresponding to the heat receiving temperature;
An ignition check lamp for checking the ignition;
In a combustion apparatus having a controller for determining whether to turn on or off the ignition confirmation lamp based on a thermoelectromotive force output from the thermocouple,
At the time of normal ignition exceeding a predetermined time from the previous combustion stop, when the thermoelectromotive force becomes equal to or higher than the ignition detection level, the controller turns on the ignition confirmation lamp,
At the time of re-ignition within a predetermined time from the previous combustion stop, the controller turns on the ignition confirmation lamp when the gradient of the thermoelectromotive force becomes positive. A gas burner supplied with fuel gas and ignited and burned by ignition means;
A thermocouple arranged in the vicinity of the gas burner and outputting a thermoelectromotive force corresponding to the heat receiving temperature;
An ignition check lamp for checking the ignition;
In a combustion apparatus having a controller for determining whether to turn on or off the ignition confirmation lamp based on a thermoelectromotive force output from the thermocouple,
Normal ignition thermoelectromotive force is less than the predetermined value at the point fire, the controller and the heat electromotive force is equal to or greater than the ignition detection level is turned the ignition confirmation lamp,
Reignition when the thermoelectromotive force is not less than a predetermined value at the time point the fire is burning device the controller and the gradient of the thermal electromotive force is positive is characterized in that turning on the ignition confirmation lamp. A gas burner supplied with fuel gas and ignited and burned by ignition means;
A thermocouple arranged in the vicinity of the gas burner and outputting a thermoelectromotive force corresponding to the heat receiving temperature;
An ignition check lamp for checking the ignition;
Based on thermoelectromotive force before Symbol thermocouple output, the combustion device having a controller for determining the turning on and off of the ignition confirmation lamp,
At the time of normal ignition exceeding a predetermined time from the previous combustion stop, when the thermoelectromotive force becomes equal to or higher than the ignition detection level, the controller turns on the ignition confirmation lamp,
At the time of reignition within a predetermined time from the previous combustion stop, the controller turns on the ignition confirmation lamp when the gradient of the thermoelectromotive force becomes positive and the thermoelectromotive force is equal to or higher than the ignition detection level. Combustion device characterized by letting it . A gas burner supplied with fuel gas and ignited and burned by ignition means;
A thermocouple arranged in the vicinity of the gas burner and outputting a thermoelectromotive force corresponding to the heat receiving temperature;
An ignition check lamp for checking the ignition;
In a combustion apparatus having a controller for determining whether to turn on or off the ignition confirmation lamp based on a thermoelectromotive force output from the thermocouple,
At the time of normal ignition in which the thermoelectromotive force at the time of ignition is less than a predetermined value, when the thermoelectromotive force is equal to or higher than the ignition detection level, the controller turns on the ignition confirmation lamp,
At the time of re-ignition when the thermoelectromotive force at the time of ignition is equal to or greater than a predetermined value, the gradient of the thermoelectromotive force becomes positive, and the controller confirms that the ignition confirmation lamp indicates that the thermoelectromotive force is greater than or equal to an ignition detection level. Combustion device characterized by lighting up. A gas burner supplied with fuel gas and ignited and burned by ignition means;
A thermocouple arranged in the vicinity of the gas burner and outputting a thermoelectromotive force corresponding to the heat receiving temperature;
An ignition check lamp for checking the ignition;
In the combustion apparatus having a controller for lighting the ignition confirmation lamp when the thermoelectromotive force output from the thermocouple is equal to or higher than an ignition detection level during ignition,
When the gas burner stops burning, the controller sets the ignition detection level during combustion. Raising to a second threshold value higher than the thermoelectromotive force output from the thermocouple, and reducing the ignition detection level from the second threshold value to the first threshold value in a predetermined pattern corresponding to the elapsed time from the combustion stop. Combustion device characterized.

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