JP4229794B2 - Ignition detection device for grill - Google Patents

Description

  The present invention relates to a combustion sensor that detects a flame generated by a burner that heats an object to be cooked placed on a placing portion in a grill cabinet, and an ignition discrimination based on information detected by the combustion sensor. The present invention relates to an ignition detection device for a grill provided with control means for determining whether the burner is in an ignition state or a non-ignition state depending on whether or not a condition is satisfied.

  The grill ignition detection device as described above is used for a grill portion such as a gas stove. After the ignition operation is performed on a burner provided in the grill portion, whether or not the burner is in an ignited state. This is for determining whether the ignition state is present.

  As such grill ignition detection means, an upper burner combustion sensor corresponding to the upper burner disposed above the mounting portion and a lower burner corresponding to the lower burner disposed below the mounting portion. A combustion sensor for the burner is provided, and the control means is in an ignition state or a non-ignition state depending on whether or not the ignition determination condition is satisfied based on detection information from the upper burner combustion sensor. It is configured to determine whether the lower burner is in an ignition state or a non-ignition state depending on whether or not the ignition determination condition is satisfied based on detection information from the lower burner combustion sensor. (For example, refer to Patent Document 1).

In this grill ignition detection device, the ignition determination condition for the upper burner and the ignition determination condition for the lower burner are determined as the same condition, and the same ignition determination condition is determined for a plurality of burners. ing.
In other words, both the ignition determination condition for the upper burner and the ignition determination condition for the lower burner are, for example, determined by the combustion sensor until the elapsed time after starting the ignition operation for the burner reaches the set time. The detection value is determined as a condition that the detected value is equal to or greater than the set value, and the control means determines that the ignition condition is satisfied for both the upper burner and the lower burner when the ignition determination condition is satisfied, and the ignition determination is performed. If the condition is not satisfied, it is determined that the non-ignition state is present.

JP 2003-156213 A

However, in the above conventional ignition detection device for grill, since the same ignition determination condition is set for a plurality of burners, it is determined whether each of the burners is in a state where the ignition is determined or not. There is a possibility that it cannot be performed accurately.
For example, depending on the location where the burner is installed, there may be a difference in conditions such as the time to reach the state where the ignition is detected, especially when the form of the burner is different. The difference in conditions such as time to reach a state becomes remarkable.
Therefore, for example, if the ignition determination condition is defined based on a burner with a short time until the ignition is determined, the burner with a long time until the ignition is determined before the ignition is determined. In contrast, if the ignition determination condition is defined based on a burner that takes a long time to reach the ignition determination state, the time to reach the ignition determination state may be determined. There is a possibility that the short burner may not be distinguished from the non-ignition state even though it is in the non-ignition state.

  The present invention has been made paying attention to such a point, and an object of the present invention is to ignite grills that can accurately determine whether each of a plurality of burners is in an ignition state or a non-ignition state. The point is to provide a detection device.

In order to achieve this object, the first feature configuration of the ignition detection device for grills according to the present invention is directed to a flame generated by a burner that heats an object to be cooked placed on a placement unit in the grill cabinet. A combustion sensor that performs detection, and a control unit that determines whether the burner is in an ignition state or a non-ignition state based on whether or not an ignition determination condition is satisfied, based on detection information from the combustion sensor. In the ignition detection device for a grill provided with
The burner is configured to include an upper burner disposed on the upper side of the mounting portion, and a lower burner having a form different from that of the upper burner and disposed on the lower side of the mounting portion,
An exhaust passage for exhausting the combustion exhaust gas of the upper burner and the lower burner is disposed on the rear side of the grill warehouse in a state of extending upward.
The combustion sensor is composed of a thermoelectric conversion sensor that converts thermal energy of the burner into electrical energy,
The ignition discrimination condition is determined separately for each burner,
The control means is configured to determine whether it is an ignition state or a non-ignition state separately for each burner,
The ignition determination condition is defined as a condition that a detected value by the combustion sensor becomes a set value or more before an elapsed time after starting an ignition operation for the burner reaches a set time. The setting time for the lower burner corresponding to the lower burner is set to be shorter than the setting time for the upper burner corresponding to the upper burner,
When the control means determines that one of the upper burner and the lower burner is non-ignited, the supply of fuel gas to the both burners of the upper burner and the lower burner is stopped. It is in the point which is comprised.

That is, since the ignition determination conditions are determined separately for each burner, even if there is a difference in conditions such as the time until the ignition is determined in each of the plurality of burners, the burner Therefore, it is possible to determine an ignition discrimination condition suitable for this condition.
For example, the ignition determination condition may be determined as a condition that the detected value by the combustion sensor is equal to or higher than the set value before the elapsed time from the start of the ignition operation to the burner reaches the set time. In addition, by setting the set time and the set value separately for each burner, it is possible to determine an ignition determination condition suitable for the condition of the burner.

Then, the control means determines whether the ignition state is individually ignited or not ignited for each burner depending on whether or not the ignition determination condition determined separately for each burner is satisfied. For example, both a burner with a short time to reach a state where ignition is determined and a burner with a long time to reach a state where ignition is determined are determined to correspond to the burner for each of a plurality of burners. Therefore, it is possible to accurately determine whether the ignition state is set or the non-ignition state based on the determined ignition determination condition.
Accordingly, it has become possible to provide an ignition detection device for a grill that can accurately determine whether each of a plurality of burners is in an ignition state or in a non-ignition state.

Moreover, the upper surface side of the to-be-cooked object placed on the placing part can be heated by the upper burner, and the lower surface side of the to-be-cooked object placed on the placing part can be heated by the lower burner. Therefore, the food to be cooked can be heated by both the upper burner and the lower burner, and the time until baking can be shortened.
Since the upper burner and the lower burner are different in form, there will be a difference between the upper burner and the lower burner in conditions such as the time until ignition is detected. With respect to the above, it is possible to determine an ignition discrimination condition suitable for the condition of the burner.
Therefore, the control means can accurately determine whether the upper burner or the lower burner is in the ignition state or the non-ignition state based on the ignition determination condition suitable for the condition of the burner. It becomes particularly effective.

Further, the control means determines the ignition of the lower burner when the detected value by the combustion sensor becomes equal to or higher than the set value before the elapsed time after starting the ignition operation for the lower burner reaches the set time for the lower burner. Even if the elapsed time after starting the ignition operation for the lower burner becomes the set time for the lower burner, the detected value by the combustion sensor is less than the set value, assuming that the condition is satisfied If the ignition determination condition is not satisfied, it is determined that the non-ignition state has occurred.
The control means also ignites the upper burner when the value detected by the combustion sensor becomes equal to or higher than the set value before the elapsed time after starting the ignition operation for the upper burner reaches the set time for the upper burner. Even if the elapsed time after starting the ignition operation for the upper burner is the upper burner set time, the detected value by the combustion sensor is less than the set value. If there is, it is determined that the non-ignition state is present, because the ignition determination condition is not satisfied.

The set time is set so that the set time for the lower burner corresponding to the lower burner is shorter than the set time for the upper burner corresponding to the upper burner. It is possible to determine at an early stage whether the state is a non-ignition state.
Therefore, when it is determined that the lower burner is in a non-ignition state for the lower burner in which the time until the ignition can be determined is shorter than the upper burner, the fuel is supplied not only to the lower burner but also to the upper burner. Since it can be stopped, the outflow of fuel such as raw gas from the upper burner can be prevented to prevent the occurrence of explosion ignition, which is particularly effective in the grill.

In addition, if the lower burner is in a form that is shorter than the upper burner until the lower burner reaches a state where the ignition can be determined, the lower burner is in a state where the lower burner can determine the ignition earlier than the upper burner. In the ignition state, fuel such as raw gas flowing out from the upper burner is exhausted by being guided to an exhaust path disposed on the upper side by the draft force of the flame generated in the lower burner.
Therefore, even if the upper burner is not ignited within the set time for the upper burner until it is determined that the upper burner is non-ignited, fuel such as raw gas flowing out from the upper burner is not stored in the grill. From this point, it is possible to prevent the occurrence of explosion ignition.

The second characteristic feature of the grill ignition detecting device according to the present invention, the ignition determination condition, until the elapsed time from the start of the ignition operation with respect to the burner is set time detection by the combustion sensor It is determined as a condition that the electric energy value is equal to or higher than the set electric energy value, and the set electric energy value is equal to the lower burner set electric energy value corresponding to the lower burner and the upper burner set electric energy value. It is in the point set so that it may become smaller than an energy value.

  That is, the set electric energy value is set so that the lower burner set electric energy value corresponding to the lower burner is smaller than the upper burner set electric energy value corresponding to the upper burner. The determination conditions can be determined separately for each of the lower burner and the upper burner.

Then, the control means sets the detected electric energy value by the combustion sensor to be equal to or higher than the set electric energy value for the lower burner until the elapsed time after starting the ignition operation for the lower burner reaches the set time. In this case, it is determined that the ignition determination condition is satisfied, the ignition state is determined, and even if the elapsed time after starting the ignition operation for the lower burner becomes the set time, the detected voltage value by the combustion sensor is for the lower burner. If it is less than the set electrical energy value, it is determined that the ignition condition is not satisfied and the non-ignition state is determined.
In addition, the control means is configured such that the electric energy value detected by the combustion sensor is equal to or higher than the set electric energy value for the upper burner before the elapsed time after starting the ignition operation for the upper burner reaches the set time. Then, it is determined that the ignition determination condition is satisfied, the ignition state is determined, and the detected voltage value by the combustion sensor is the upper burner even if the elapsed time after starting the ignition operation for the upper burner becomes the set time. If it is less than the set electrical energy value, the non-ignition state is determined as the ignition determination condition is not satisfied.

  Therefore, it is possible to accurately determine whether the upper burner and the lower burner are in the ignition state or the non-ignition state based on the ignition determination condition suitable for each burner.

An embodiment in which a grill ignition detection device according to the present invention is applied to a gas stove will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, this gas stove is composed of a built-in type gas stove including a stove burner 1 and a grill portion 3 having a grill burner 2. The stove burner 1 is a standard burner 1a. And a small burner 1b and a high thermal power burner 1c.

  And the grill exhaust port 4 for exhausting the combustion exhaust gas of the grill part 3 is formed, and the top surface of the gas stove is covered with the top plate 5, and the standard burner 1a, the small burner 1b, Five victories 6 for receiving and supporting an object to be heated (such as a pan) with respect to the high thermal power burner 1c are placed and supported.

As shown in FIG. 3 and FIG. 4, the grill unit 3 places an object to be cooked such as fish in a grill box 7 that is formed in a box shape having an open front surface and a closed rear surface. A grill net 8 is provided as a mounting portion.
The grill burner 2 includes an upper burner 2a disposed above the grill net 8, and a pair of left and right lower burners 2b that are different in form from the upper burner 2a and disposed below the grill net 8. 2c.
Incidentally, FIG. 3 shows a longitudinal side view of the grill portion 3, and FIG. 4 shows a longitudinal front view of the grill portion 3.

  The upper burner 2a is composed of a planar radiant burner along the top surface of the grill cabinet 7, and each of the pair of left and right lower burners 2b, 2c is disposed at the lateral end of the grill cabinet 7 and grilled. It is comprised by the elongate bunsen type burner along the front-back width direction of the store | warehouse | chamber 7. FIG.

An exhaust passage 9 for exhausting the combustion exhaust gas from the grill burner 2 to the outside of the machine is disposed on the rear side of the grill chamber 7 so as to extend upward, and the exhaust gas from the grill burner 2 is grilled in the exhaust passage 9. It is configured to lead to the exhaust port 4.
Incidentally, the secondary air of the grill burner 2 is configured to be taken in from the air holes 37 in the bottom surface portion and the front surface portion of the grill cabinet 7 and to cool the juice tray 10 described later by the flow of the secondary air. ing.

Below the grill net 8, there is provided a juice receiving tray 10 for receiving oil from a food such as fish, and the juice receiving tray 10 is not shown, but is a guide provided on the side wall of the grill cabinet 7. With this guide, the grille 7 can be housed and moved out with the grill 8 placed thereon.
Moreover, the front part of the soup pan 10 is provided with a door 11 with a handle that closes the front face of the grill pan 7 when the soup pan 10 is stored in the grill pan 7.
And a user is comprised so that the juice tray 10 and the grille 8 may be integrally moved and taken out with respect to the grill warehouse 7 by opening and closing the door part 11 with a handle.

Further, on the front side of the gas stove, there is provided a manual operation unit S for instructing ignition and extinguishing of the standard burner 1a, small burner 1b, high thermal power burner 1c, and grill burner 2, thermal power adjustment, and various settings. A control unit H is also provided as a control means configured to execute various controls.
The control unit H is configured to control the standard burner 1a, the small burner 1b, the high thermal power burner 1c, and the grill burner 2 based on the operation state commanded by the manual operation unit S.

As shown in FIG. 1, the manual operation unit S includes three heating state adjusting units for instructing each of the standard burner 1a, the small burner 1b, and the high thermal power burner 1c to ignite, extinguish, and adjust the thermal power. 12, a grill panel 13 for instructing the grill burner 2 to ignite and extinguish and adjust the heating power, and a setting input panel 14 for instructing cooking settings.
Each of the heating state adjusting units 12 is provided with a push button type rotation operation unit 15, and the rotation operation unit 15 is switched between a pushing position that is substantially flush with the front panel 16 and a protruding position that protrudes forward. The ignition switch (not shown) is turned ON / OFF to give an ignition command and a fire extinguishing command, and the fuel supply amount is adjusted by rotating the rotary operation unit 15 in the protruding position. It is configured.

In addition, a plurality of LED lamps 17 are arranged around the rotation operation unit 15, and the heating power (heating amount) set in the rotation operation unit 15 is set using the plurality of LED lamps 17 as a level meter. The size is displayed by turning on one of the LED lamps 17.
By the way, in this embodiment, the magnitude of the thermal power can be changed and adjusted in five levels from the minimum thermal power to the maximum thermal power in the standard burner 1a and the high thermal power burner 1c, and can be changed and adjusted in three levels in the small burner 1c. Yes.

As shown in FIG. 5, the grill panel 13 has an ignition / extinguish button 18 for instructing ignition and extinguishing of the grill burner 2, timer time setting buttons 19 and 20 for setting the combustion time of the grill burner 2, and grills. There are provided a thermal power switching button 21 for switching the thermal power of the burner 2, a menu button 22 for instructing an automatic grill function for automatically grilling fish, a baking button 23, and the like.
The menu button 22 is a button for selecting one of the menus of “appearance grilling”, “fillet”, and “dried fish”, and the baking mode button 23 is used to select one of the strong, standard, and weak levels. The selection button 24 is a button for canceling a menu or a setting that has already been set.

Incidentally, in this embodiment, both the upper burner 2a and the lower burners 2b and 2c are configured so that the heating power can be changed and adjusted in two stages of strong and weak.
Then, by the thermal power switching button 21, a thermal power state in which both the upper burner 2a and the lower burners 2b and 2c have a strong thermal power, and a thermal power state in which the thermal power of the upper burner 2a is strong and the thermal power of the lower burners 2b and 2c are weak. Switching to four thermal power states, namely, a thermal power state in which the thermal power of the upper burner 2a is weak and a thermal power of the lower burners 2b and 2c is strong, and a thermal power state in which both the upper burner 2a and the lower burners 2b and 2c are weak in thermal power It is configured to be possible.

Although not shown in the figure, the setting input panel 14 is a button for automatically adjusting the heating power when performing child lock ON / OFF setting input, “fried food”, “rice cooking”, and “hot water”. In addition, a timer time setting button for setting the burner combustion time is provided.
An automatic return type push-operated power switch 25 is provided on the front side of the gas stove.

As shown in FIG. 2, each of the standard burner 1a, the small burner 1b, and the high thermal power burner 1c is provided with a spark plug 26 and a thermocouple 27 for detecting an ignition state.
As for the grill burner 2, as shown in FIGS. 2 to 4, an ignition plug 26 and a thermocouple 27 for detecting an ignition state are provided in each of the upper burner 2 a and the pair of left and right lower burners 2 b and 2 c. It has been.
The thermocouple 27 is a thermoelectric conversion sensor that detects the flame generated by the burner and converts the heat energy of the burner into electric energy, and is configured to function as a combustion sensor.
In addition, the standard burner 1a is provided with a temperature sensor 28 that detects the temperature of the heated object in contact with the bottom surface of the heated object placed and supported by the five virtues 6.

As shown in FIG. 3, the spark plug 26 and the thermocouple 27 for the left and right lower burners 2b and 2c are disposed at locations corresponding to the rear end positions of the lower burners 2b and 2c. It is arranged in the ignition box 38 having a shape.
Further, an upper temperature sensor 39 and a lower temperature sensor 40 used for performing an auto grill function are provided behind the place where the spark plug 26 and the thermocouple 27 are disposed with respect to the pair of left and right lower burners 2b and 2c. Is provided.
Incidentally, the upper temperature sensor 39 is disposed above the lower temperature sensor 40 so as to be located downstream of the lower temperature sensor 40 in the flow direction of the combustion exhaust gas.

  The gas supply configuration to the standard burner 1a, the small burner 1b, the high thermal power burner 1c, and the grill burner 2 will be described. As shown in FIG. 2, an original gas solenoid valve 30 is provided in the original gas supply path 29. The source gas supply path 29 is branched into four systems: a standard burner branch path 29a, a small burner branch path 29b, a high thermal power burner branch path 29c, and a grill burner branch path 29d.

The branch path 29d for the grill burner to the grill burner 2 is further branched into a branch path for the upper burner and a branch path for the lower burner, and a flow path 32 with an orifice 31 is provided in each of these branch paths. A bypass path 34 having an open / close electromagnetic valve 33 is provided.
In each of the standard burner branch 29a, the small burner branch 29b, the high thermal burner branch 29c, and the grill burner branch 29d, the amount of gas is adjusted by driving the stepping motor. A flow rate control valve 35 for adjusting the heating amount and a position sensor 36 for detecting the opening position thereof are provided.

  The control unit H performs an ignition process for igniting the stove burner 1 and the grill burner 2 and a fire extinguishing process for extinguishing the fire based on the ignition command and the fire extinguishing command from the heating state adjusting unit 12 and the grill panel 14. In the inside, a heating power adjustment process for adjusting the heating power is performed so that the heating power set by the heating state adjusting unit 12 and the grill panel 14 is obtained.

Hereinafter, the operation of the control unit H for the stove burner 1 based on the command from the heating state adjusting unit 12 will be described. However, the same operation is performed with the three burners of the standard burner 1a, the small burner 1b, and the high thermal power burner 1c. Since it is comprised, it adds description as operation | movement of the stove burner 1. FIG.
First, when the rotation operation unit 15 is switched to the protruding position and an ignition command is commanded, the control unit H opens the original gas solenoid valve 30 and controls the flow rate based on the detection information of the position sensor 36. The valve 35 is adjusted to an ignition gas amount, and an ignition process for igniting the ignition plug 26 is performed.

And the control part H is comprised so that it may discriminate | determine whether the stove burner 1 is an ignition state or a non-ignition state based on the detection voltage value by the thermocouple 27 in the state which performed the above-mentioned ignition process. ing.
That is, when the detected voltage value by the thermocouple 27 becomes equal to or higher than the set voltage value before the elapsed time from the start of the ignition operation by the spark plug 26 reaches the set time, the control unit H is in the ignition state. If the detected voltage value by the thermocouple 27 is less than the set voltage value even if the elapsed time after starting the ignition operation by the spark plug 26 becomes the set time, the stove burner 1 is not ignited. It is comprised so that it may determine that it is in a state.

  When determining that the controller H is in an ignition state, the control unit H continues the combustion of the stove burner 1 and controls the flow rate based on the detection information of the position sensor 36 so that the heating power set by the rotary operation unit 15 is obtained. The flow control valve 35 is adjusted based on the detection information of the position sensor 36 so that the heating power is changed and set by the rotary operation unit 15 during the combustion of the stove burner 1 while the valve 35 is adjusted. It is comprised so that the thermal-power adjustment process to perform may be performed.

  Further, when the control unit H determines that it is in the non-ignition state, the control unit H closes the original gas solenoid valve 30 and the flow rate control valve 35 to supply the fuel gas to the stove burner 1 that is determined to be in the non-ignition state. Is configured to stop.

  Then, when the rotary operation unit 15 is switched to the pushing position and a fire extinguishing command is commanded during the combustion of the stove burner 1, the control unit H closes the original gas solenoid valve 30 and the flow rate control valve 35, It is configured to perform a fire extinguishing process for stopping the combustion of the stove burner 1 by stopping the supply of the fuel gas to the stove burner 1 to which the fire extinguishing command is commanded.

Hereinafter, the operation of the control unit H for the grill burner 2 based on a command from the grill panel 14 will be described.
First, when an ignition command is commanded by the ignition / extinguish button 18, the control unit H opens the original gas solenoid valve 30, and positions the upper burner 2a and the lower burners 2b and 2c with respect to both positions. Based on the detection information of the sensor 36, the flow control valve 35 is adjusted to an ignition gas amount, and an ignition process for igniting the ignition plug 26 is performed.

  Then, the controller H performs each of the upper burner 2a and the lower burners 2b and 2c depending on whether or not the ignition determination condition is satisfied based on the detection information by the thermocouple 27 in the state where the ignition process is performed. For each burner, whether it is ignited or non-ignited is determined separately, and based on the result of the determination for each burner, it is determined whether it is ignited or non-ignited as a grill burner An ignition state determination process is performed.

To explain the ignition state determination process, the ignition determination condition for each burner is that the detected voltage value by the thermocouple 27 until the elapsed time from the start of the ignition operation by the spark plug 26 reaches the set time. Is defined as a condition that is equal to or greater than the set voltage value.
The ignition determination condition is set for each burner with the set time and the set voltage value set for each burner, and is set for each burner.

More specifically, the ignition determination condition for the lower burners 2b and 2c is that a thermocouple is used until the elapsed time Tk from the start of ignition operation by the spark plug 26 reaches the lower burner set time T1. 27 is determined as a condition that the detected voltage value Vk of 27 is equal to or higher than the lower burner set voltage value V1.
The ignition determination condition for the upper burner 2a is that the detected voltage value Vk by the thermocouple 27 is increased until the elapsed time Tk from the start of the ignition operation by the spark plug 26 reaches the upper burner set time T2. It is determined as a condition that the burner set voltage value V2 or more.
The set time is set such that the lower burner set time T1 is shorter than the upper burner set time T2 (T1 <T2), and the set voltage value as the set electric energy value is the lower burner set voltage The value V1 is set to a value (V1 <V2) smaller than the upper burner set voltage value V2.

  In this manner, since the time until the lower burners 2b and 2c reach the state where the ignition is determined is shorter than that of the upper burner 2a, the ignition determination condition is that the lower burners 2b and 2c are lower than the upper burner 2a. Is determined so that it can be determined at an early stage whether it is in an ignition state or a non-ignition state.

Then, the control unit H controls each of the lower burners 2b and 2c until the elapsed time Tk from the start of the ignition operation by the spark plug 26 reaches the lower burner set time T1. When the detected voltage value Vk by both of the pair 27 is equal to or higher than the lower burner set voltage value V1, it is determined that the lower burners 2b and 2c are in an ignited state, and then the upper burner 2a. It is comprised so that it may discriminate | determine whether it is an ignition state about a non-ignition state.
Further, the control unit H sets the thermoelectric power of the lower burners 2b and 2c even when the elapsed time Tk from the start of the ignition operation by the spark plug 26 becomes the lower burner set time T1. If the detected voltage value Vk by both of the pairs 27 is less than the lower burner set voltage value V1, it is determined that the lower burners 2b and 2c are in an unignited state because the ignition determination condition is not satisfied, and the upper burner 2a The grill burner is configured to determine that it is in the non-ignition state without determining whether it is in an ignition state or not.

Then, the controller H increases the detected voltage value Vk by the thermocouple 27 until the elapsed time Tk from the start of ignition operation by the spark plug 26 reaches the upper burner setting time T2 for the upper burner 2a. When the burner set voltage value V2 or higher, the upper burner 2a is determined to be in an ignited state, and the grill burner is determined to be in an ignited state, assuming that the ignition determination condition is satisfied.
In addition, the control unit H increases the detected voltage value Vk by the thermocouple 27 for the upper burner 2a even when the elapsed time Tk from the start of the ignition operation by the spark plug 26 becomes the upper burner setting time T2. If it is less than the set voltage value V2 for the burner, it is determined that the ignition determination condition is not satisfied, the upper burner 2a is determined to be in an unignited state, and the lower burners 2b and 2c are determined to be in an ignition state. As a burner, it is configured to determine that it is in a non-ignition state.

In this way, when the control unit H determines that both the upper burner 2a and the lower burners 2b and 2c are in an ignited state and determines that they are in an ignited state as a glu-burner, the combustion of the grill burner 2 is performed. And the flow rate control valve based on the detection information of the position sensor 36 for both the upper burner 2a and the lower burners 2b, 2c so that the thermal power state set by the thermal power switch button 21 is obtained. It is comprised so that the thermal power adjustment process which adjusts 35 may be performed.
Then, in the thermal power adjustment process, when the thermal power state is changed and set by the thermal power switching button 21 during the combustion of the grill burner 2, the control unit H is based on the detection information of the position sensor 36 so that the thermal power state is obtained. The flow control valve 35 is configured to be adjusted.

Further, when the control unit H determines that one of the upper burner 2a and the lower burners 2b and 2c is non-ignited and determines that the grill burner is not ignited, the upper burner 2a and the lower burner For both the burners 2b and 2c, the original gas solenoid valve 30 and the flow rate control valve 35 are closed to stop the supply of fuel gas.
Accordingly, when it is determined that the lower burners 2b and 2c have a shorter ignition time than the upper burner 2a, the upper burner 2a is in an ignited or non-ignited state. Since it is possible to stop the supply of fuel gas to the upper burner 2a without discriminating whether there is any, the outflow of raw gas from the upper burner 2a is prevented to prevent the occurrence of problems such as explosion ignition. Will be able to.

Since the lower burners 2b and 2c are burners having a shorter time until the ignition is determined than the upper burner 2a, the lower burners 2b and 2c are in an ignition state before the upper burner 2a. It is possible to determine whether it is in a non-ignition state.
Therefore, when the lower burners 2b and 2c are ignited, the raw gas flowing out from the upper burner 2a is guided to the exhaust passage 9 by the draft force of the flame generated in the lower burners 2b and 2c and exhausted. Therefore, even if the upper burner 2a is not ignited within the set time for the upper burner until it is determined that the upper burner 2a is in the non-ignition state, the raw gas flowing out from the upper burner 2a is not stored in the grill cabinet 7. It is less likely to stay inside.

  Then, when a fire extinguishing command is commanded by the ignition / extinguishing button 18 during the combustion of the grill burner 2, the controller H controls the original gas solenoid valve for both the upper burner 2a and the lower burners 2b, 2c. 30 and the flow rate control valve 35 are closed to perform a fire extinguishing process for stopping the supply of fuel gas.

The operation of the control unit H regarding the ignition state determination process in the grill burner 2 will be described based on the flowchart of FIG.
First, in a state where ignition processing is performed by an ignition command by the ignition / extinguish button 18, when the detected voltage value Vk of the thermocouple 27 is equal to or higher than the lower burner set voltage value V1 for the lower burners 2b and 2c, the lower burner 2b , 2c are determined to be in an ignition state (steps 1 to 4).

  If the detected voltage value Vk of the thermocouple 27 is less than the lower burner set voltage value V1, is the elapsed time Tk from the start of the ignition operation at the spark plug 26 equal to the lower burner set time T1? If the elapsed time Tk is the lower burner set time T1, it is determined that the lower burners 2b and 2c are in the non-ignition state, and the non-ignition is determined as the grill burner in the non-ignition state. Judgment is made (steps 5 to 7).

After determining that the lower burners 2b and 2c are in an ignition state, if the detected voltage value Vk of the thermocouple 27 is equal to or higher than the upper burner set voltage value V2 for the upper burner 2a, the upper burner 2a is in an ignition state. It is determined that there is an ignition, and an ignition determination is performed to determine that the grill burner is in an ignition state (steps 8 to 9).
For the upper burner 2a, if the detected voltage value Vk of the thermocouple 27 is less than the upper burner set voltage value V2, the elapsed time Tk from the start of the ignition operation by the spark plug 26 is the upper burner set time. It is determined whether or not it is T2, and if the elapsed time Tk is the upper burner set time T2, it is determined that the upper burner 2a is in a non-ignition state, and it is determined that the grill burner is in a non-ignition state The non-ignition judgment is made (steps 11, 12, and 7).

[Another embodiment]
( 1 ) In the above embodiment, the same ignition discrimination condition is set for the pair of left and right lower burners 2b and 2c. However, the pair of left and right lower burners 2b and 2c are also separately provided corresponding to each burner. An ignition discrimination condition may be defined.

( 2 ) In the above embodiment, the grill burner 2 is configured to include the planar upper burner 2a and the elongated lower burners 2b and 2c. However, the arrangement position and form of the burner, and the burner The number and the like can be changed as appropriate.

( 3 ) In the above embodiment, the flow control valve 35 that adjusts the gas amount by driving the stepping motor is exemplified, but it is also possible to implement using other control valves such as a proportional solenoid valve and a solenoid valve. .

( 4 ) In the above embodiment, an example in which the ignition detection device for grills according to the present invention is applied to a built-in gas stove has been shown, but it can also be applied to a table-type gas stove, and is applicable to various gas stoves. Is possible.

Gas stove perspective view Gas stove configuration diagram Vertical side view of grill Front view of the grill section Detailed view of grill panel The flowchart which shows the ignition state discrimination | determination process of a control part

Explanation of symbols

2 Grill burner 2a Upper burner 2b, 2c Lower burner 7 Grill box 8 Placement part H Control means

Claims (2)

An ignition discrimination condition is satisfied based on a combustion sensor that detects a flame generated by a burner that heats the food to be cooked placed on the placing portion in the grill warehouse, and detection information by the combustion sensor. An ignition detection device for a grill provided with control means for determining whether the burner is in an ignited state or a non-ignited state depending on whether or not
The burner is configured to include an upper burner disposed on the upper side of the mounting portion, and a lower burner having a form different from that of the upper burner and disposed on the lower side of the mounting portion,
An exhaust passage for exhausting the combustion exhaust gas of the upper burner and the lower burner is disposed on the rear side of the grill warehouse in a state of extending upward.
The combustion sensor is composed of a thermoelectric conversion sensor that converts thermal energy of the burner into electrical energy,
The ignition discrimination condition is determined separately for each burner,
The control means is configured to determine whether it is an ignition state or a non-ignition state separately for each burner,
The ignition determination condition is determined as a condition that a detected value by the combustion sensor becomes a set value or more before an elapsed time from the start of ignition operation to the burner reaches a set time, and the set time is The setting time for the lower burner corresponding to the lower burner is set to be shorter than the setting time for the upper burner corresponding to the upper burner,
When the control means determines that one of the upper burner and the lower burner is non-ignited, the supply of fuel gas to the both burners of the upper burner and the lower burner is stopped. An ignition detection device for a grill configured . The ignition determination condition is defined as a condition that an electric energy value detected by the combustion sensor is equal to or higher than a set electric energy value until an elapsed time after starting an ignition operation for the burner reaches a set time,
The set electric energy value is set so that the lower burner set electric energy value corresponding to the lower burner is smaller than the upper burner set electric energy value corresponding to the upper burner. Ignition detection device for grills.

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