JPH0960882A - Gas cooking device with grill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas cooking device having a grill in which it has a function to perform an accurate discrimination of ignition state at a grill burner and display it. SOLUTION: An ignition sensing part 9 detects a temperature within a grill and an inclination sensing part 8 detects a gradient of an output value of the ignition sensing part 9. When a burner is operated to be ignited, a calculation processing part 5 starts a time limiting operation of a timer 3 and stores an output value of the ignition sensing part 9 during igniting operation in a memory 7. After performing an igniting operation, as the limiting time of the timer 3 elapses, the calculation processing part 5 discriminates that the grill burner is kept at its ignited state in the case that an output value of the ignition sensing part 9 at that time is increased from the output value stored in the memory 7 and the output value of time ignition sensing part 9 at the time when the limiting time of the timer 3 elapses, and then the displaying part 1 is applied to display the ignited state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cooker with a grill having a function of displaying the ignition state of the grill.

[0002]

2. Description of the Related Art In a gas cooker with a grill, it is difficult to judge the ignition state of a burner of a grill from the outside. Therefore, conventionally, for example, the ignition state of a burner as disclosed in Japanese Patent Application Laid-Open No. Hei 6-241460 is determined by using a lamp. Etc. are provided.

As shown in FIG. 3, the gas cooker with a grill includes an operation unit 6 for performing a point / fire extinguishing operation of a burner (not shown) of the grill, and an ignition unit comprising a thermocouple for detecting a temperature in the grill. A detection unit 9, a control unit 4 that determines the ignition state of the burner from the output value of the ignition detection unit 9, and a display unit 1 that includes a grill combustion confirmation lamp that displays the ignition state from the determination result of the control unit 4. The control unit 4 includes a memory 7 for storing an output value of the ignition detection unit 9 at the time of the ignition operation, a timer 3 for limiting a predetermined time from the ignition operation, a value stored in the memory 7 and the ignition detection unit 9. An arithmetic processing unit 5 for determining the ignition state of the burner from the output value of
And a driving unit 2 that drives the display unit 1 based on the determination result.

Here, the arithmetic processing unit 5 compares the output value of the ignition detection unit 9 during the ignition operation stored in the memory 7 with the output value of the ignition detection unit 9 at the time when the time limit of the timer 3 has elapsed. The ignition state of the burner is determined by comparison. The time limit of the timer 3 may be as short as several seconds, and is a value experimentally obtained from the reaction speed of the thermocouple.

[0005] In such a gas cooker with a grill, gas is generally supplied to the burner through a safety valve. The safety valve is normally closed. For example, while a current flows through a solenoid built in the safety valve, an electromagnetic force is generated and the safety valve is kept open. If the burner is not ignited, the safety valve is closed and no gas is supplied to the burner. At the time of the ignition operation, when the push-type instrument plug as the operation unit 6 as shown in FIG. 4A is pushed to the ignition push-off position, the safety valve is opened while the push-in instrument is pushed, and gas is supplied to the burner and ignited. . If the arithmetic processing unit 5 determines that the burner is in the ignition state after the time limit of the timer 3 has elapsed, a current flows through the solenoid of the safety valve, and the safety valve is kept open to supply gas to the burner. To continue. On the other hand, when the arithmetic processing unit 5 determines that the burner is in the non-ignition state, no current flows through the solenoid of the safety valve, and the safety valve cannot be kept open and closed.

The operating section 6 may be a rotary instrument stopper as shown in FIG.

[0007]

In the gas cooker with a grill constructed as described above, the ignition detector 9 is used to detect the ignition state of the burner, that is, the presence or absence of a flame from the temperature change in the grill.
The output value of the thermocouple increases as the temperature in the grill increases, and the output value decreases as the temperature in the grill decreases.

Here, when the burner is re-ignited while the temperature in the grill is high, the output value of the thermocouple changes as shown in FIG. In the section AB in FIG. 5, the burner is in an ignited state, but since the temperature in the grill has reached a saturated state, the output value of the thermocouple is substantially constant. At point B in FIG. 5, when the push-type instrument plug is pushed to the fire-extinguishing push-off position, the safety valve is closed, and in the section BC, the burner is in a non-ignition state. During this time, the temperature inside the grill has decreased and the thermocouple output has also decreased. At a point C in FIG. 5, when the push-type instrument plug is pushed to the push-off position at the time of ignition, the safety valve is opened and the burner is ignited, so that in the section CD of FIG. Thermocouple power increases. At point D in FIG. 5, when the operating force of the push instrument tap is reduced, the push instrument tap returns to the burning position. At this time, since timer 3 is still in time operation,
Since the arithmetic processing unit 5 has not determined that the burner is in the ignition state, the holding current does not flow through the safety valve, the safety valve is closed, and the burner is in the non-ignition state. Accordingly, in the section DE, the temperature inside the grill decreases and the thermocouple output also decreases.

However, when the timer 3 has timed out after the time limit has elapsed from the time of the ignition operation, the arithmetic processing unit 5 compares the thermocouple outputs at the time of the ignition operation and at the time of the time-up to determine the time of the ignition operation (FIG. 5). Since the thermocouple output at the time-up of the timer 3 (point E in FIG. 5) is greater than the thermocouple output at the point C), the arithmetic processing unit is provided even though the burner is in the non-ignition state. No. 5 has a problem that it is determined that the burner is in the ignition state.

[0010] The present invention has been made in view of the above problems, and has as its object to provide a gas cooker with a grill that can accurately determine and display the ignition state of a burner. .

[0011]

According to the present invention, in order to achieve the above object, an ignition detector for detecting an ignition state of a burner of a grill, and a memory for storing an output value of the ignition detector during an ignition operation are provided. An inclination detection unit that detects the inclination of the output value of the ignition detection unit, a timer that limits the fixed time from the time of the ignition operation, and a timer that stores the output value of the ignition detection unit during the ignition operation and the timer after the ignition operation that are stored in the memory. An operation of comparing the output value of the ignition detection unit at the time when the time limit has elapsed and determining the ignition state of the burner based on the comparison result and the slope of the output value of the ignition detection unit after the time limit of the timer has elapsed. Processing unit, and a display unit for displaying the ignition state of the burner based on the determination result of the arithmetic processing unit, and the grill inside the grill from the time of the ignition operation until the time limit of the timer elapses. If the output value of the ignition detection unit at the time when the timer rises and the time limit of the timer elapses is increasing, it is determined that the grill burner is in the ignition state. It can be displayed accurately.

According to the second aspect of the present invention, an ignition detection unit for detecting an ignition state of a burner of the grill, and a value obtained by multiplying an output value of the ignition detection unit at the time of an ignition operation by a coefficient corresponding to the value are stored. A memory, a slope detection unit for detecting a slope of an output value of the ignition detection unit, a timer for time limiting a certain time from the time of the ignition operation, and a value stored in the memory and a time after the time limit of the timer after the ignition operation has elapsed. An arithmetic processing unit that compares the output value of the ignition detection unit, and that determines the ignition state of the burner based on the comparison result and the slope of the output value of the ignition detection unit after the time limit of the timer has elapsed; A display unit for displaying the ignition status of the burner according to the determination result of the above.The ignition time of the timer after the ignition operation is calculated from a value obtained by multiplying the temperature inside the grill at the time of the ignition operation by a coefficient corresponding to the temperature. If the temperature rises at the time when has elapsed and the temperature tends to rise at the time when the time limit time of the post-ignition timer has elapsed, it is determined that the burner is in the ignition state, so the arithmetic processing unit determines It is possible to more accurately determine the ignition state of the burner.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) As shown in FIG. 1, a gas cooker with a grill using this embodiment has a burner (not shown) for the grill.
An operation unit 6 for operating the point / fire extinguishing, an ignition detection unit 9 composed of a thermocouple for detecting the temperature in the grill, a control unit 4 for judging an ignition state of the burner from an output of the ignition detection unit 9, and a control unit. A display unit 1 comprising a grill combustion confirmation lamp for displaying the ignition status of the burner based on the determination result of 4; a control unit 4 comprising: a memory 7 for storing an output value of an ignition detection unit 9 at the time of an ignition operation; An inclination detecting unit 8 for detecting an inclination of an output value of the unit 9, a timer 3 for limiting a predetermined time from the time of the ignition operation, and a value stored in the memory 7 and a time when the time limit of the timer 3 after the ignition operation has elapsed. And an arithmetic processing unit 5 which determines the ignition state of the burner based on the output values of the ignition detection unit 9 and the inclination detection unit 8 in the above.

Here, when an ignition operation is performed by the operation unit 6, the arithmetic processing unit 5 causes the ignition detection unit 9 to detect the ignition operation.
Is stored in the memory 7 and the timed operation of the timer 3 is started. When the time limit of the timer 3 has elapsed after the ignition operation, the arithmetic processing unit 5 reads the output values of the inclination detection unit 8 and the ignition detection unit 9 and determines the ignition state of the burner. That is, when the output value of the ignition detection unit 9 after the elapse of the time limit is less than the output value stored in the memory 7, the arithmetic processing unit 5 determines that the burner is in the non-ignition state, and the drive unit 2 causes the display unit 1 to display. To turn off. If the output value of the ignition detector 9 after the time limit is equal to or more than the output value stored in the memory 7 and the output value of the ignition detector 9 after the time limit is increasing, the arithmetic processing unit 5 determines that the burner is in the ignition state, and turns on the display unit 1 by the drive unit 2.

Here, the set value of the time limit of the timer 3 may be a short time of about several seconds, and is a value experimentally determined by the reaction speed of the thermoelectromotive force of the thermocouple. Timer 3
During the timed operation, the display unit 1 may be displayed blinking, or when the burner is in a non-ignition state, an alarm display may be performed in addition to turning off the display unit 1. In this embodiment, the control unit 4 is configured by a microcomputer. However, when the display unit 1 requires a large drive current, the drive unit 2 may be provided separately from the microcomputer.

(Embodiment 2) As shown in FIG. 2, the gas cooker with a grill used in the present embodiment is the same as the gas cooker with a grill of Embodiment 1, and is formed by a thermocouple for detecting the temperature in the grill. Using the output value of the detection unit 9 as an input, the temperature determination unit 10 that determines whether the temperature inside the grill is equal to or higher than a threshold value and outputs the determination result to the arithmetic processing unit 5 includes a control unit 4.
Is provided.

Here, when an ignition operation is performed by the operation unit 6, the arithmetic processing unit 5 starts the time-delaying operation of the timer 3, and the output value of the ignition detection unit 9 and the determination of the temperature determination unit 10 at the time of the ignition operation. Read the result. At this time, if the output value of the ignition detection unit 9 during the ignition operation is, for example, less than 6 mV from the determination result of the temperature determination unit 10 during the ignition operation, the arithmetic processing unit 5 multiplies the output value by, for example, 0.8. The value is stored in the memory 7. On the other hand, when the output value of the ignition detection unit 9 during the ignition operation is, for example, 6 mV or more, the arithmetic processing unit 5 stores a value obtained by multiplying the output value by, for example, 1.2 in the memory 7. Here, the threshold value of the temperature determination unit 10 and the coefficient by which the output value of the ignition detection unit 9 is multiplied are values experimentally determined based on the reaction speed of the thermoelectromotive force of the thermocouple.

When the time limit of the timer 3 elapses,
The arithmetic processing unit 5 includes the ignition detection unit 9 and the inclination detection unit 8 when the time stored in the memory 7 and the time limit elapse.
And the output value of. Here, when the output value of the ignition detection unit 9 after the elapse of the time limit is less than the value stored in the memory 7, the arithmetic processing unit 5 determines that the burner is in the non-ignition state, and the driving unit 2 displays the display unit. 1 is turned off. On the other hand, when the output value of the ignition detection unit 9 after the lapse of the time limit is equal to or greater than the value stored in the memory 7 and the output value of the ignition detection unit 9 after the lapse of the time limit tends to increase, the calculation processing unit 5 Determines that the burner is in the ignition state, and causes the drive unit 2 to turn on the display unit 1.

The configuration other than the arithmetic processing unit 5 and the temperature discriminating unit 10 is the same as that of the first embodiment, and a description thereof will be omitted.

[0020]

According to the first aspect of the present invention, as described above, an ignition detector for detecting the ignition state of a burner of a grill, a memory for storing an output value of the ignition detector during an ignition operation,
An inclination detection unit that detects the inclination of the output value of the ignition detection unit, a timer that limits the fixed time from the ignition operation, and an output value of the ignition detection unit during the ignition operation stored in the memory and the time limit of the timer after the ignition operation. An arithmetic process that compares the output value of the ignition detection unit at the time when the time has elapsed and determines the ignition state of the burner based on the comparison result and the output value of the inclination detection unit at the time when the time limit time of the timer has elapsed And a display unit that displays the ignition state of the burner according to the determination result of the arithmetic processing unit, the temperature in the grill rises from the time of ignition operation to the time when the time limit time of the timer elapses, and It is determined that the burner of the grill is in the ignition state only when the output value of the ignition detection unit at the time when the time limit time of the timer has elapsed is increasing.
There is an effect that the arithmetic processing unit can accurately determine the ignition state of the burner of the grill.

According to a second aspect of the present invention, an ignition detection unit for detecting an ignition state of a burner of a grill, and a value obtained by multiplying an output value of the ignition detection unit at the time of an ignition operation by a coefficient corresponding to the value are stored. A memory, a slope detection unit for detecting a slope of an output value of the ignition detection unit, a timer for time limiting a certain time from the time of the ignition operation, and a value stored in the memory and a time after the time limit of the timer after the ignition operation has elapsed. An arithmetic processing unit for comparing the output value of the ignition detection unit and determining the ignition state of the burner based on the comparison result and the slope of the output value of the ignition detection unit at the time when the timer time limit has elapsed; and A display unit for displaying the ignition state of the burner according to the determination result of the processing unit, and a value obtained by multiplying the temperature inside the grill at the time of the ignition operation by a coefficient corresponding to the temperature to a value of the timer after the ignition operation. If the temperature at the time when the time has elapsed and the temperature at the time when the time limit of the timer after the ignition operation has been increasing tends to increase, it is determined that the burner is in the ignition state. Has the effect that the ignition state of the burner of the grill can be more accurately determined.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment.

FIG. 2 is a block diagram showing a second embodiment.

FIG. 3 is a block diagram showing a conventional example.

FIG. 4 (a) is an external view of a conventional push-type instrument plug position. (B) It is an outline drawing of a rotary instrument stopper position same as the above.

FIG. 5 is a diagram showing a relationship between time and a thermocouple output value in a conventional example.

[Explanation of symbols]

 1 Display Section 3 Timer 5 Arithmetic Processing Section 7 Memory 8 Tilt Detection Section 9 Ignition Detection Section

Claims (2)

[Claims] 1. An ignition detection unit for detecting an ignition state of a burner of a grill, a memory for storing an output value of the ignition detection unit at the time of an ignition operation, and a gradient detection for detecting a gradient of an output value of the ignition detection unit. Unit, a timer for delaying a fixed time from the ignition operation, an output value of the ignition detection unit at the time of the ignition operation stored in the memory, and the ignition detection unit at the time when the time limit of the timer has elapsed after the ignition operation An arithmetic processing unit that compares the output value of the timer with the output value of the inclination detection unit at the time when the timer time limit elapses, and determines the ignition state of the burner; and the arithmetic processing unit And a display unit for displaying an ignition state of the burner based on the determination result of (1). 2. An ignition detection unit for detecting an ignition state of a burner of a grill, a memory for storing a value obtained by multiplying an output value of the ignition detection unit at the time of an ignition operation by a coefficient corresponding to the ignition detection unit, An inclination detecting unit for detecting an inclination of an output value of the unit, a timer for delaying a fixed time from the time of the ignition operation, and a value stored in the memory and the ignition detection at a time when the time limit of the timer elapses after the ignition operation. An arithmetic processing unit that compares the output value of the burner with an output value of the burner, and determines an ignition state of a burner based on a result of the comparison and an output value of the tilt detection unit when the timer time limit has elapsed. A display unit for displaying the ignition status of the burner according to the determination result of the unit.