JP2703476B2 - Gas cooker with grill - Google Patents

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 confirming and displaying the ignition state of a burner of a grill.

[0002]

2. Description of the Related Art In a gas cooker with a grill, the ignition state of a burner of the grill is difficult to judge from the outside, and therefore, it is difficult to judge.
There is provided an apparatus that detects the ignition state of a burner and displays the ignition state of the burner on a display unit such as a confirmation lamp. FIG. 2 shows a schematic configuration of a conventional gas cooker of this type. In this gas cooker, an operation unit 1 for performing an ignition operation of a burner of a grill, an ignition detection unit 2 for detecting an ignition state of the burner, a display unit 3 for displaying an ignition state of the burner, and an output of the ignition detection unit 2 And a control unit 4 that determines the ignition state of the burner and controls the display of the display unit 3.

In this type of gas cooker, when the burner is ignited by the operation unit 1, the control unit 4 determines from the output of the ignition detection unit 2 that the burner is ignited, and the display unit 3 ignites. Display. At this time, when the burner is not ignited despite performing the ignition operation, the control unit 4 does not perform any display on the display unit 3,
Inform the user that the burner is in a non-ignition state. For example, when a confirmation lamp is used as the display unit 3, the ignition state is displayed by turning on the confirmation lamp, and the non-ignition state is displayed by turning off the confirmation lamp.

[0004]

In this type of conventional gas cooking device, a thermocouple is used as the ignition detector 2. This thermocouple detects the presence or absence of a flame from the temperature, and the thermoelectromotive force changes according to the temperature in the grill.
Then, since the output of the thermocouple is equal to or more than a predetermined value, the control unit 4 performs the ignition determination of the burner.

By the way, due to the structure of the grill, it takes a considerable amount of time after the combustion of the burner is stopped as shown in FIG. 3 (the fire extinguishing time is indicated by t ₀ in the figure) until the temperature in the grill decreases. . For this reason, when a thermocouple is used as the ignition detection unit 2, the output of the thermocouple that changes with the temperature in the grill requires a considerable amount of time to return to the state before ignition.

Now, when the temperature inside the grill is almost as high as when the burner is ignited, when the grill is reused, the thermocouple generates an output almost the same as at the time of ignition. For this reason, the control unit 4 has a problem that, even when the burner is in the non-ignition state, the burn-in state is erroneously determined to be in the ignition state, and the display unit 3 makes the ignition display. That is, in the related art, if the output of the ignition detection unit 2 after ignition is equal to or more than a predetermined value, it is determined that the ignition is in the ignition state, and such a malfunction has occurred. Therefore, the original purpose of the display unit 3 for displaying the ignition state of the burner could not be achieved.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to accurately determine the ignition state of a burner even when the grill is reused in a state where the temperature inside the grill is high. An object of the present invention is to provide a gas cooker with a grill that can be distinguished.

[0008]

According to the present invention, in order to achieve the above object, an operation section for performing an ignition operation of a burner of a grill, an ignition detection section for detecting an ignition state of the burner of the grill, and an ignition of the burner A display unit for displaying a state, and a control unit for determining the ignition state of the burner from the output of the ignition detection unit after the ignition operation and performing an ignition display on the display unit. Storage means for storing an output; time-measuring means for measuring a predetermined time from the time of ignition operation; and comparing the output of the ignition detection section at the time when the time-measurement time has elapsed with the output stored in the storage means, The control unit is constituted by the determination means for determining the ignition state of
Another means is to use the output of the ignition detector during the burner ignition operation.
Temperature determining means for determining the temperature inside the grill at the time of ignition operation
Equipped in advance according to the temperature inside the grille during the ignition operation.
Multiplied by the output of the ignition detector during ignition operation.
In the meantime, the time measured by the timer
A determination value for determining the burner ignition state at the time
Of the actual ignition detector at the time
Comparing the force with the above judgment value to determine the ignition status of the burner
I am trying to do it.

[0009]

The present invention is constructed as described above, and based on the output of the ignition detection unit at the time of performing the burner ignition operation,
As well as determine the ignition state of the burner, grayed the ignition operation
Ignition detection after a certain time after taking into account the temperature in the rill
Predict the output change of the unit, and the judgment set based on the prediction
Value and the actual ignition detector output
By comparing the power with the
Ri, and allows the change in the output of the ignition detection portion after the ignition operation to determine the ignition state of the burner, exactly ignition of burner
It is possible to detect .

[0010]

FIG . 1 shows an embodiment of the present invention. The gas cooker with a grill of this embodiment is basically the same as the conventional gas cooker with a grill described with reference to FIG. 2. is there. In this embodiment, the control unit 4 includes a memory 41 as a storage unit for storing an output of the ignition detection unit 2 at the time of the ignition operation of the burner, and a timer 4 as a time measurement unit for measuring a fixed time from the ignition operation.
2 and an output of the ignition detection unit 2 at the time when the time measured by the timer 42 has elapsed and an output stored in the memory 41, and an arithmetic processing unit 43 as a determination unit for determining the ignition state of the burner. A driving unit 44 as driving means for driving the display unit 3 according to the result of the burner ignition determination ;
From the output of the ignition detection unit 2 during the ignition operation,
Grill temperature as a temperature determination means for determining the temperature inside the grill
And a determination unit 45 . That is, as is apparent from the configuration of FIG. 1, in this embodiment, the control unit 4 is configured by a microcomputer. When the display unit 3 requires a large drive current, the drive unit 44 may be provided separately from the microcomputer.

By the way, in the present embodiment, the ignition discrimination is accurately performed.
In order to perform, the burner's ignition state taking into account the temperature inside the grill
Ignition based on the output change state of the ignition detection unit 2 in the idle state.
I try to do another. Specifically, during ignition operation
Output of ignition detection unit 2 after burner ignition for temperature in rill
The change in force is determined experimentally, and the change in output is ignited.
A determination value for appropriately determining whether or not is determined, and
This determination value and the ignition detection at the time when the timer 42 times out
The ignition is determined by comparing the output of the unit 2.

Here, based on the above experimental results, the ignition operation
The judgment value according to the temperature in the grill
The coefficient to be obtained by multiplying the output of the detection unit 2 can be determined in advance.
If not good. That is, the output of the ignition detection unit 2 after the burner is ignited
The change depends on the temperature in the grill during the ignition operation
Therefore, the coefficient is changed as described above. This allows
Taking into account the output change of the ignition detection unit 2 during a certain time after the fire
The set coefficient is set. In addition, such ignition
Predetermine the grill temperature at the time of ignition operation to make the determination
In this embodiment, it is necessary to keep
A determination unit 45 is provided.

For example, a thermocouple is used as the ignition detection unit 2.
If the temperature inside the grill is low during the ignition operation,
The rate of increase in the output of the ignition detection unit 2 after ignition is fast. vice versa,
When the temperature inside the grill is high, that is, when the temperature inside the grill
If the grill is to be reused in a high position,
The temperature rise rate slows down. This is just after fire extinguishing
Is because the temperature inside the grill is almost saturated
is there.

The operation of this embodiment will be described below. In addition,
The following description is based on the assumption that a thermocouple is used as the ignition detection unit 2 and the display unit 3 is formed of a confirmation lamp, and that when the detected temperature increases, the thermoelectromotive force increases and its output increases. I do. When the ignition operation is performed by the operation unit 1, a signal indicating that the ignition operation has been performed is input to the arithmetic processing unit 43 of the control unit 4. At this time, the arithmetic processing unit 4
In 3 reads the output of the ignition from the ignition detector unit 2, the
Ignition detection reading the coefficient according to the temperature inside the grill at the time
The determination value is determined by multiplying the output of the output unit 2. And that
The determination value is stored in the memory 41. At the same time, timer 4
The second timed operation is started. Here, the time limit of the timer 42 may be a short time of about several seconds.

When the timer 42 times out, the arithmetic processing unit 43 reads the output of the ignition detection unit 2 again, and the output is stored in the output of the ignition detection unit 2 at the time of ignition.
The value multiplied by the constant coefficient, that is, the value stored in the memory 41
It is determined whether it is larger than the determination value. After a certain time
If the subsequent output is greater than the judgment value, it is in the ignition state
The arithmetic processing unit 43 determines that the burner is ignited on the display unit 3 ( turns on the confirmation lamp). Conversely, if the value is equal to or less than the judgment value, a non- ignition state
Is determined, a display indicating that the burner is in a non-ignition state on the display unit 3 is performed (the confirmation lamp is not turned on) .

In the above description, when the output of the ignition detection unit 2 at the time when the timer 42 times out is the same as the output at the time of ignition, it is determined that the ignition has not occurred. Depending on the structure, for example, the positional relationship between the thermocouple serving as the ignition detection unit 2 and the burner, even if the burner is in the ignition state, the output change of the ignition detection unit 2 is gradual, and the ignition detection unit at time-up There may be situations where the output of 2 is the same as the output at the time of ignition or, in some cases, slightly lower .

Therefore, the coefficient at the time of high temperature is set to, for example, 0.8 so that such a situation can be detected as ignition . Note that the coefficient at the time of constant temperature may be set to, for example, 1.2. It goes without saying that these coefficients may be set appropriately in accordance with the grill to which the present invention is applied. With this configuration, the ignition can be determined from the output change state of the ignition detection unit 2 in consideration of the temperature in the grill, and the ignition state can be detected more accurately. In the case described above, a target value is obtained in advance and stored in the memory 4.
1, but the memory 41 stores the output of the ignition detection unit 2 at the time of ignition. At the time when the timer 42 expires, the output of the ignition detection unit 2 read from the memory 41 is multiplied by a coefficient. The value may be calculated and the comparison process may be performed.

By the way, in the above case, the confirmation lamp of the display unit 3 does not perform any display until the timer 42 times out after the ignition, but during this period, the display during the ignition determination process is performed on the display unit 3. It is preferable to notify the user that ignition detection is being performed. For example,
When a confirmation lamp is used as the display unit 3, the confirmation lamp may be made to blink. Further, at the time of misfiring, a non-firing state may be notified using an alarm buzzer or an alarm lamp provided separately from the confirmation lamp.

Therefore, the output of the ignition detection unit 2 at the time when the timer 42 times out is slightly changed from the ignition detection unit 2 at the time of ignition.
Also, when the output is lower than the output, the ignition may be determined. If the ignition is not performed, the output of the ignition detection unit 2 does not become the above-mentioned slightly low state, and the output of the ignition detection unit 2 surely decreases to indicate a lower output state. Even so, there is virtually no problem.

By the way, the coefficient depends on the temperature inside the grill.
Although it is conceivable to make detailed settings, the area around the gas cooker
Due to changes in the environment and changes over time, ignition detection
It is conceivable that the change state itself of the output of the output unit 2 changes.
Therefore, even if the coefficient is set very finely,
Cause. Therefore, in the present embodiment, the ignition detection unit at the time of ignition
The temperature inside the grill is roughly divided from the output of 2
Set a coefficient for each temperature range.
You. For example, if the temperature inside the grill is low or high
It is only necessary to set a coefficient corresponding to each.

[0021]

As described above, the present invention provides an operation section for performing an ignition operation of a burner of a grill, an ignition detection section for detecting an ignition state of a burner of the grill, and a display section for displaying an ignition state of the burner. A control unit that determines the ignition state of the burner from the output of the ignition detection unit after the ignition operation and performs an ignition display on the display unit, and a storage unit that stores the output of the ignition detection unit at the time of the ignition operation of the burner; Timer means for counting a certain time from the time of ignition operation, and discriminating means for comparing the output of the ignition detector at the time when the clock time has elapsed with the output stored in the storage means to determine the ignition state of the burner. And the above control unit
At the same time, when the determination means
From the output of the ignition detector, the temperature inside the grill during ignition operation is determined.
Separate temperature discriminating means, inside the grill at the time of the ignition operation.
The predetermined coefficient set in advance according to the temperature of the ignition
By multiplying the output of the ignition detection unit,
Check the ignition status of the burner at the elapse of the time measured by the timekeeping means.
Determine the judgment value for discrimination, and determine the actual
The output of the ignition detection unit at the time of
Made to determine the ignition state of Na, based on the output of the ignition detection section at the time of performing the ignition operation of the burner, in together when determining the ignition state of the burner, the temperature in the grill when the ignition operation
Change in the output of the ignition detector after a certain period of time
And the judgment value and time measured based on the prediction
Comparison with the actual output of the ignition detector at the point
The ignition operation is determined by determining the ignition state of the burner.
The ignition state of the burner can be determined from the output change of the ignition detection unit later, so that the ignition of the burner can be accurately detected .

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional example.

FIG. 3 is a graph showing output characteristics of a thermocouple after burner combustion is stopped.
is there.

[Explanation of symbols]

 Reference Signs List 1 operation unit 2 ignition detection unit 3 display unit 4 control unit 41 memory 42 timer 43 arithmetic processing unit 45 grill temperature determination unit

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akihito Hayano 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi Harman Co., Ltd. (56) References JP-A-6-241461 (JP, A) Japanese Utility Model 2 −54039 (JP, U)

Claims (1)

(57) [Claims] 1. An operation section for performing an ignition operation of a burner of a grill, an ignition detection section for detecting an ignition state of a burner of the grill, a display section for displaying an ignition state of the burner, and an ignition detection section after the ignition operation. A control unit for judging the ignition state of the burner from the output and displaying an ignition on the display unit, storing means for storing the output of the ignition detection unit at the time of the ignition operation of the burner, and counting a certain time from the time of the ignition operation The control unit is configured by a timer unit that performs the operation and a determination unit that determines the ignition state of the burner by comparing the output of the ignition detection unit at the time point when the clock time elapses with the output stored in the storage unit. Along with the above
Another means is based on the output of the ignition detector during the burner ignition operation.
Temperature determining means for determining the temperature inside the grill at the time of ignition operation
Equipped in advance according to the temperature inside the grille during the ignition operation.
Multiplied by the output of the ignition detector during ignition operation.
In the meantime, the time measured by the timer
A determination value for determining the burner ignition state at the time
Of the actual ignition detector at the time
Comparing the force with the above judgment value to determine the ignition status of the burner
Gas cooker with grill, characterized in that formed by.