JP2022098551A - Gas cooker - Google Patents

Abstract

To suppress occurrence of an ignition error while avoiding explosive ignition of a gas burner.SOLUTION: When a time required from a user's ignition operation to ignition determination of a gas burner becomes long, for example, until a gas cooker is installed in a new location and determined to be ignited first, when a combustion stop time of the gas burner is long, or when a detection temperature of the gas burner is low, a predetermined time is prolonged within a predetermined upper limit time, so that ignition error is suppressed while avoiding explosive ignition of the gas burner.SELECTED DRAWING: Figure 5

Description

The present invention relates to a gas cooker such as a gas stove or a gas grill.

In response to the user's ignition operation, the gas cooker started an ignition operation in which fuel gas was supplied to the gas burner to generate an ignition spark, and the gas burner was ignited by the time a predetermined time had elapsed from the ignition operation. If it is determined that, the generation of sparks is stopped, the ignition operation is terminated, and then combustion is continued.

In such a gas cooker, if it is not determined that the ignition has occurred by the time when the predetermined time has elapsed from the ignition operation, it is regarded as an ignition error, the supply of fuel gas to the gas burner is stopped, and an ignition spark is generated. Stop it.

The time required from the ignition operation by the user to the determination that the gas burner has been ignited may be long, for example, due to the difference in the fuel gas supply pressure depending on the place where the gas cooker is installed.

When the time required from the user's ignition operation to the ignition determination of the gas burner becomes long in this way, in the conventional example in which the predetermined time is fixed at a fixed time, the ignition determination of the gas burner cannot be determined within the predetermined time, and ignition is performed. The number of errors will increase. If ignition errors occur frequently, the user will make a maintenance call. Increasing the number of maintenance calls is not desirable for both the user and the manufacturer.

Therefore, in Patent Document 1, while the user continues the ignition operation, the ignition operation is continued regardless of the lapse of a predetermined time, from the user's ignition operation to the ignition determination of the gas burner. A control device for a gas combustion appliance that can ignite a gas burner even if the time required is long has been proposed.

Japanese Unexamined Patent Publication No. 2001-50536

In Patent Document 1, while the user continues the ignition operation, the ignition operation of supplying fuel gas to the gas burner to generate an ignition spark is continued. Therefore, if the duration of the ignition operation becomes too long, The amount of fuel gas supplied becomes too large, and there is a high possibility that explosive ignition (explosion) will occur.

The present invention has been made in view of the above points, and an object of the present invention is to suppress the occurrence of an ignition error while avoiding explosive ignition.

In order to achieve the above object, the present invention is configured as follows.

(1) The gas cooker according to the present invention is for igniting a gas burner to which fuel gas is supplied, an ignition plug for igniting the gas burner, an igniter to which the spark plug is electrically connected, and the gas burner. Based on the operation unit to be ignited, the flame detection sensor that detects the flame of the gas burner, the ignition operation of the operation unit, and the detection output of the flame detection sensor, the supply of fuel gas to the gas burner is controlled. , A gas cooker provided with a control means for controlling the igniter.
The control means includes a determination unit that determines whether or not the gas burner is ignited based on the detection output of the flame detection sensor, and the control means fuels the gas burner in response to an ignition operation of the operation unit. The gas supply is started, the drive of the igniter is started, a spark discharge is generated in the spark plug, and the determination unit determines that the gas burner has been ignited by the time a predetermined time has elapsed from the ignition operation. Then, the drive of the igniter is stopped, and after the predetermined time elapses without the determination unit determining that the gas burner has been ignited, the supply of fuel gas to the gas burner is stopped and the igniter is stopped. The control means changes the predetermined time within a predetermined upper limit time.

According to the present invention, the control means starts supplying fuel gas to the gas burner in response to the ignition operation of the user, and also starts driving the igniter to generate a spark discharge in the spark plug, from the ignition operation. If it is determined that the gas burner has been ignited by the elapse of a predetermined time, the drive of the igniter can be stopped and combustion can be continued. Further, the supply of fuel gas to the gas burner is stopped and the drive of the igniter is stopped so that the explosive ignition does not occur after the predetermined time elapses without determining that the gas burner has been ignited. The ignition operation can be stopped as an ignition error.

Further, the control means changes the predetermined time within a predetermined upper limit time.

Since the control means can change the predetermined time in this way, the predetermined time can be set according to the time required from the ignition operation of the user to the ignition determination of the gas burner. For example, the gas cooker is installed. When the time required from the ignition operation of the user to the ignition determination of the gas burner becomes long due to the difference in the fuel gas supply pressure depending on the location, it is possible to suppress the occurrence of ignition error by lengthening the predetermined time. can.

Moreover, since the predetermined time is variable within a predetermined upper limit time, explosive ignition can be avoided by setting this upper limit time as a long time during which the explosive ignition of the gas burner does not occur. , Safe.

As described above, the gas cooker according to the present invention is safe by avoiding explosive ignition, and is easy to use while suppressing the occurrence of ignition error.

(2) In a preferred embodiment of the present invention, the gas burners having different ignition thermal powers are provided, and the control means changes the predetermined time according to the ignition thermal power of the gas burners. The smaller the ignition power, the longer the predetermined time.

The smaller the ignition power of the gas burner, the less likely it is that explosive ignition will occur even if the predetermined time is long. That is, in the gas burner, the time from the ignition operation to the occurrence of explosive ignition differs depending on the ignition power. On the other hand, in the conventional example in which the predetermined time is fixed at a fixed time, the predetermined time is not an appropriate time according to the ignition power. Therefore, for example, if a gas burner having a large ignition power is fixed at a short predetermined time so that explosive ignition does not occur, in a gas burner having a small ignition power, the gas burner is ignited by the time the short predetermined time elapses. It cannot be determined and there is a risk of ignition error.

According to this embodiment, the predetermined time is variable within the upper limit time according to the ignition thermal power of the gas burner, and the smaller the ignition thermal power of the gas burner is, the longer the predetermined time is. It takes time, and while avoiding explosive ignition and maintaining safety, it is possible to suppress the occurrence of ignition error and improve usability.

(3) In one embodiment of the present invention, the control means includes a time measuring unit for measuring the combustion stop time of the gas burner, and the control means changes the predetermined time according to the combustion stop time. Therefore, the longer the combustion stop time, the longer the predetermined time.

When the combustion stop time of the gas burner is long, the fuel gas in the gas pipeline is diluted or replaced by air, so that the time required from the ignition operation of the user to the ignition determination of the gas burner becomes long. For this reason, in the conventional example in which the predetermined time is fixed at a fixed time, if the combustion stop time of the gas burner is long, the ignition determination of the gas burner cannot be determined by the time the predetermined time elapses, and there is a high possibility that an ignition error occurs. ..

According to this embodiment, the predetermined time is variable within the upper limit time according to the combustion stop time of the gas burner, and the longer the combustion stop time is, the longer the predetermined time is, so that explosive ignition is avoided and safety is ensured. While maintaining it, it is possible to suppress the occurrence of ignition error, which improves usability.

(4) In another embodiment of the present invention, the temperature detecting unit for detecting the temperature of the gas burner is provided, and the control means changes the predetermined time according to the detection temperature of the temperature detecting unit. The lower the detection temperature, the longer the predetermined time.

The lower the temperature of the gas burner, the lower the temperature of the fuel gas, and the lower the temperature, the narrower the explosion limit of the gas, which may make it difficult to ignite. Therefore, in the conventional example in which the predetermined time is fixed at a fixed time, if the temperature of the gas burner is low, the ignition determination of the gas burner cannot be determined by the time the predetermined time elapses, and there is a high possibility that an ignition error occurs.

According to this embodiment, the predetermined time is variable within the upper limit time according to the detection temperature of the gas burner, and the lower the detection temperature of the gas burner is, the longer the predetermined time is, so that explosive ignition is avoided and safety is ensured. While maintaining it, it is possible to suppress the occurrence of ignition error, which improves usability.

(5) In still another embodiment of the present invention, the temperature detection unit is a temperature sensor that detects the temperature of the object to be heated by the gas burner.

According to this embodiment, the temperature of the gas burner can be shared with the temperature sensor that detects the temperature of the object to be heated by the gas burner, for example, a cooking container such as a pot, and it is not necessary to provide a separate temperature sensor. , Can be an inexpensive configuration.

(6) In one embodiment of the present invention, the setting operation unit operated to set the predetermined time is provided, and the control means changes the predetermined time according to the setting operation of the setting operation unit. ..

According to this embodiment, since the predetermined time can be changed within the upper limit time according to the setting operation by the user, there is a bias peculiar to the installation location of the gas cooker, for example, the fuel gas component to be supplied. If there is a reason that the gas cooker is installed in an area or building where the fuel gas supply pressure is low or it is difficult to ignite, the user, etc. should set an appropriate predetermined time according to the installation location. Since it can be set, it is possible to suppress the occurrence of an ignition error while avoiding explosive ignition and maintaining safety, which improves convenience.

(7) In a preferred embodiment of the present invention, the gas cooker is provided with an installation state detection unit that detects that the gas cooker has been installed in a new installation location, and the control means is based on the detection output of the installation state detection unit. The predetermined time is variable, and the predetermined time is set until the determination unit first determines that the gas burner has been ignited by the ignition operation installed at the new installation location. , Make it longer than the prescribed time after that.

According to this embodiment, when the installation state detection unit detects that the gas cooker has been installed in a new installation location, it takes a predetermined time until the determination unit first determines that the gas burner has been ignited by the ignition operation. To lengthen. For example, when the gas cooker is installed in a newly built condominium, the gas pipe of the condominium is long, and the ignition operation and ignition error are repeated many times before the fuel gas reaches the gas cooker. By lengthening the predetermined time, the number of ignition operations and ignition errors can be reduced. This makes it possible to reduce the workload of the operator when installing the gas cooker in a new installation location.

(8) In another embodiment of the present invention, the power source of the control means is a replaceable battery or a commercial power source (100V power source) loaded in the battery loading unit, and the installation state detecting unit is the battery. Is detected as being installed in a new installation location when it is first loaded into the battery loading unit or when it is first connected to the commercial power supply (100V power supply).

According to this embodiment, the gas cooker is installed in a new installation location when the battery is first loaded into the battery loading section after shipment or when it is first connected to said commercial power (100V power). Since it is detected, it is possible to reliably detect that the battery has been installed in a new installation location.

(9) In still another embodiment of the present invention, a plurality of the gas burners are arranged on the top plate of the gas cooker, and the control means is depending on the position of the gas burner on the top plate. The predetermined time is variable, and the farther the position of the gas burner is from the user, the longer the predetermined time.

According to this embodiment, among the plurality of gas burners, the farther the arrangement position on the top plate is from the user, the longer the predetermined time is longer than the closer one, so that the predetermined time is tentatively explosive. Even if ignition occurs, the gas burner is located far from the user, so the effect on the user is small and safety can be ensured.

According to the present invention, since the predetermined time is variable within a predetermined upper limit time, it can be set to a predetermined time according to the time required from the ignition operation of the user to the ignition determination of the gas burner, for example. When the time required from the user's ignition operation to the ignition determination of the gas burner becomes long due to the difference in fuel gas supply pressure depending on the location where the gas cooker is installed, ignition is performed by lengthening the predetermined time. It is possible to suppress the occurrence of errors.

Moreover, since the predetermined time is variable within a predetermined upper limit time, explosive ignition can be avoided by setting this upper limit time as a long time during which the explosive ignition of the gas burner does not occur. , Safe.

It is possible to provide an easy-to-use gas cooker that avoids explosive ignition, is safe, and suppresses the occurrence of ignition error.

FIG. 1 is a perspective view of a gas stove with a grill according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of the gas stove with a grill of FIG. FIG. 3 is a conventional time chart in which a predetermined time is fixed at a fixed time. FIG. 4 is a time chart of the present embodiment in which a predetermined time is variable. FIG. 5 is a flowchart showing variable processing for a predetermined time according to an embodiment of the present invention. FIG. 6 is a flowchart showing variable processing for a predetermined time according to another embodiment of the present invention. FIG. 7 is a diagram showing each part of a cooking setting input unit for a grill and a cooking setting input unit for a gas stove.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In this embodiment, it will be described by applying it to a gas stove with a grill as a gas cooker.

FIG. 1 is a perspective view of a gas stove A with a grill according to an embodiment of the present invention. The gas stove A with a grill is provided with three stove burners 2a to 2c having different maximum thermal powers as gas burners on the upper part of the stove main body 1. Further, the gas stove A with a grill has a grill burner (not shown) as a gas burner in the center of the left and right of the stove body 1, and a grill plate (not shown) having a grill door 3a in front can be taken in and out from the front. The attached grill part 3 is provided.

The gas stove A with a grill of this embodiment is a built-in type that is dropped and mounted in a kitchen cabinet (not shown).

The upper portion of the stove main body 1 is covered with a top plate 4, and a grill exhaust port 5 for exhausting the combustion exhaust gas of the grill portion 3 is provided on the upper surface of the inner end of the stove.

In this embodiment, one (left side) of the stove burners 2a and 2b arranged on the left and right on the front side of the top plate 4 is a standard thermal power stove burner 2a, and the other (right side) is a high thermal power stove. It is a burner 2b. Further, the stove burner 2c arranged in the central portion on the back side is a stove burner 2c having a small thermal power. Each stove burner 2a to 2c is equipped with temperature sensors 7a to 7c including a cooking container as an object to be heated, for example, a thermistor for detecting the temperature of the bottom of the pot, and corresponding trivets 6a to 6c. Each is listed.

On the upper left and right of the front surface of the stove main body 1, heating state adjusting units 8a to 8c are provided as three operating units for igniting, extinguishing, and adjusting the thermal power of the stove burners 2a to 2c. In this embodiment, the heating state adjusting portion 8a of the standard thermal power stove burner 2a is arranged on the left side of the front surface, and the heating condition adjusting portion 8b of the high thermal power stove burner 2b and the small thermal power stove burner are arranged on the right side of the front surface. The heating state adjusting portion 8c of 2c is arranged.

Further, on the upper right side of the front surface, an automatic return type push button type power switch 9 for turning on / off the energization of each part is provided.

Each of the heating state adjusting units 8a to 8c is composed of push buttons that can move in the front-rear direction, and when using the stove burners 2a to 2c, the heating state adjusting units 8a to 8c composed of push buttons are pressed to perform an ignition operation. As a result, the retreated heating state adjusting units 8a to 8c project forward to turn on the instrument plug, spark discharge is performed on the outflowing gas fuel, and the stove burners 2a to 2c are ignited.

When the heating state adjusting portions 8a to 8c including the push buttons are projected forward and the heating state adjusting portions 8a to 8c are picked up by fingers and rotated, the heating power of the stove burners 2a to 2c can be adjusted. There is. On the other hand, when extinguishing a fire, the heated state adjusting parts 8a to 8c protruding forward are pushed backward by pressing the heating state adjusting parts 8a to 8c protruding backward, and the appliance plug is turned off and the stove is turned off. Burners 2a-2c are extinguished.

Operation panels 10 and 11 are storably provided at the lower left and right sides of the front surface of the stove body 1. The operation panel 11 on the right side is provided with a grill cooking setting input unit 12 for performing operations related to the grill unit 3, and this operation panel 11 is a grill side operation panel. Further, the operation panel 10 on the left side is provided with a cooking setting input unit 13 for a gas stove for inputting cooking settings to the stove burners 2a to 2c, and this operation panel 10 is a stove side operation panel.

In the grill cooking setting input unit 12 and the gas stove cooking setting input unit 13, automatic cooking can be set by the grill unit and the stove burners 2a to 2c. Examples of this automatic cooking include automatic cooking in which the heating power of the stove burners 2a to 2c is switched to control the temperature within a certain temperature range.

FIG. 2 is a schematic configuration diagram of the gas stove A with a grill of FIG. 1, and the portion corresponding to FIG. 1 is designated by the same reference numeral.

Each stove burner 2a to 2c has an ignition plug 14a to 14c for igniting each stove burner 2a to 2c, an igniter 22a to 22c to which each spark plug 14a to 14c is electrically connected, and a stove. Thermocouples 15a to 15c are provided as flame detection sensors for detecting the flames of the burners 2a to 2c, respectively. Further, the stove burners 2a to 2c are provided with temperature sensors 7a to 7c for detecting the temperature of the cooking container 19, for example, the bottom of the pan, as described above.

Similarly, in the grill portion 3, the spark plugs 17a and 17b for igniting the upper and lower grill burners 16a and 16b, respectively, and the igniters 22d and 22e to which the spark plugs 17a and 17b are electrically connected, respectively, Thermocouples 18a and 18b are provided as flame detection sensors for detecting the flames of the grill burners 16a and 16b, respectively. Further, a temperature sensor 21 including a thermistor or the like for detecting the temperature of the bottom of the grill pan 20 is provided.

By energizing (driving) the igniters 22a to 22e individually corresponding to the burners 2a to 2c, 16a and 16b, the spark plugs 14a to 14c individually corresponding to the burners 2a to 2c, 16a and 16b, Spark discharge occurs at 17a and 17b.

Branch supply paths 24 to 27 branched from the fuel supply path 23 for supplying fuel gas such as city gas are connected to the stove burners 2a to 2c and the grill burners 16a and 16b, respectively.

A main solenoid valve 28 is provided in the fuel supply path 23. In each of the branch supply paths 24 to 27, flow control valves 29 to 32 including motor valves driven by a stepping motor to finely adjust the opening degree of the valve body for adjusting the supply amount of fuel gas, and the above-mentioned Rotational angle sensors 33 to 36 for detecting the opening degree of the valve body are provided.

Each flow rate control valve 29 to 32 has a function as a safety valve that shuts off the fuel gas supply path when the burners 2a to 2c, 16a, 16b are extinguished.

The branch supply path 27 for the grill burners 16a and 16b is provided with a governor 37 that adjusts the supply pressure of the fuel gas to a set pressure.

The control unit 40 composed of a microcomputer detects thermocouples 15a to 15c, 18a, 18b and temperature sensors 7a to 7c, 21 as flame detection sensors for detecting the flames of the burners 2a to 2c, 16a, 16b, respectively. Along with the output, the outputs of the rotation angle sensors 33 to 36 of the flow control valves 29 to 32 are given.

Further, the control unit 40 is given an operation input from a manual operation unit 42 including the above-mentioned heating state adjusting units 8a to 8c, a cooking setting input unit 12 for a grill, a cooking setting input unit 13 for a gas stove, and the like. This operation input includes a point fire extinguishing command for the burners 2a to 2c, 16a, 16b according to the point fire extinguishing operation by the user.

The control unit 40 is a burner based on the operation input from the manual operation unit 42, the thermocouples 15a to 15c, 18a, 18b, the temperature sensors 7a to 7c, 21, and the outputs of the rotation angle sensors 33 to 36. It has a function as a control means for controlling point fire extinguishing, fuel gas supply, and combustion of 2a to 2c, 16a, and 16b.

Further, the control unit 40 functions as a determination unit for determining whether or not the burners 2a to 2c, 16a and 16b are ignited based on the electromotive force of the thermocouples 15a to 15c, 18a and 18b as the flame detection sensor. It is equipped with. In this determination, the thermocouples 15a to 15c, 18a, 18b detect a flame, and when the electromotive force becomes equal to or higher than the threshold voltage Vs, it is determined that the thermocouple has ignited.

Further, the control unit 40 has a function as a timekeeping unit for measuring the combustion stop time from when the combustion of each burner 2a to 2c, 16a, 16b is stopped until the next ignition operation is performed.

Further, the control unit 40 has a function as an installation state detection unit for detecting that the gas stove A with a grill is installed at a new installation location. In the installation state detection unit of this embodiment, when the battery, which is a replaceable battery, is first set (loaded) in the battery box as the battery loading unit after shipment, the gas stove A with a grill is newly installed. Detect as installed in place.

When the ignition is commanded by the ignition operation of the user, the control unit 40 starts supplying fuel gas to the commanded burners 2a to 2c, 16a, 16b, and the corresponding thermocouples 15a to 15c, 18a, 18b. The igniters 22a to 22e, the main solenoid valves 28, and the corresponding flow control valves 29 to 32 are used so that the ignition operation is performed for a predetermined time until it is determined that the ignition has occurred based on the output (electromotive force). Control. Further, the control unit 40 is configured to stop the supply of fuel gas to the commanded burners 2a to 2c, 16a, 16b when the fire extinguishing operation is commanded by the user.

In this embodiment, in order to suppress the occurrence of an ignition error while avoiding the explosive ignition of the burners 2a to 2c, 16a, 16b, the following is performed.

That is, the control unit 40 starts supplying the fuel gas to the burners 2a to 2c, 16a, 16b in response to the ignition operation by the user, and also starts driving the igniters 22a to 22e corresponding to the ignition operation. Then, spark discharge is generated in the spark plugs 14a to 14c, 17a, 17b, and when it is determined that the control burners 2a to 2c corresponding to the ignition operation are ignited by the time when a predetermined time elapses from the ignition operation, the ignition operation is performed. The drive of the igniters 22a to 22e corresponding to the above is stopped, the ignition operation is stopped, and the combustion state is continued.

Further, the burners 2a to 2a to correspond to the ignition operation are not determined to have ignited the burners 2a to 2c, 16a, 16b corresponding to the ignition operation, and the explosive ignition does not occur after the predetermined time elapses. The supply of fuel gas to 2c, 16a, 16b is stopped, and the driving of the igniters 22a to 22e corresponding to the ignition operation is stopped to stop the ignition operation. At the same time, as an ignition error, the combustion lamps around the heating state adjusting units 8a to 8c are blinked to notify the ignition error.

Further, in this embodiment, the control unit 40 makes the predetermined time variable within a predetermined upper limit time.

Here, the action and effect of the present embodiment in which the predetermined time is changed within a predetermined upper limit time will be described in comparison with a conventional example in which the predetermined time is fixed at a fixed time.

Hereinafter, the stove burners 2a to 2c will be described, but the same applies to the grill burners 16a and 16b.

FIG. 3 shows an example of a conventional time chart in which the predetermined time is fixed at a fixed time. The figure (a) shows the ignition operation (ignition command) by the user, the figure (b) shows the open / closed state of the original solenoid valve 28, and the figure (c) shows the open / closed state of the flow control valves 29 to 31. The figure (d) shows the drive (energization) state of the igniters 22a to 22c, the figure (e) shows the state of the flame of the stove burners 2a to 2c, and the figure (f) shows the thermocouples 15a to 15c as the flame detection sensor. The output (electromotive force) and the figure (g) show the ignition determination result, and the figure (h) shows the state of the combustion lamp.

Further, in FIGS. 3A to 3H, the solid line indicates the case where ignition is normally performed within the predetermined time, and the broken line indicates the case where ignition is normally performed within the predetermined time, resulting in an ignition error. Shows the case.

First, a case where ignition is normally performed within a predetermined time (ts-t0) is shown by a solid line will be described. The predetermined time (ts-t0) is, for example, 5 seconds.

At time point t0, when the ignition operation is performed by the user as shown in the figure (a), the main solenoid valve 28 is opened and the flow rate corresponding to the ignition operation is performed as shown in the figure (b). The control valves 29 to 31 are opened as shown in FIG. 3C, and the supply of fuel gas to the stove burners 2a to 2c corresponding to the ignition operation is started.

Further, as shown in FIG. 3D, the igniters 22a to 22c corresponding to the ignition operation are driven (ON), and spark discharge is generated in the spark plugs 14a to 14c corresponding to the ignition operation. As a result, as shown in FIG. 3E, for example, at time point t1, a flame of the stove burners 2a to 2c corresponding to the ignition operation is generated, and as shown in FIG. A flame is detected by the thermocouples 15a to 15c and an electromotive force is generated.

When the electromotive force of the thermocouples 15a to 15c corresponding to the ignition operation reaches the threshold voltage Vs for determining the presence or absence of ignition at a predetermined time (ts-t0), for example, at time point t2, the figure (figure). As shown in g), it is determined that the ignition has occurred, and the ignition determination result becomes a high level. As a result, the drive of the igniters 22a to 22c is stopped as shown in the figure (d), and the combustion lamp is turned on as shown in the figure (h) to notify the user that the combustion has started. And continue the combustion state.

Next, for example, because the supply pressure of the fuel gas at the place where the gas cooker is installed is low, the time required from the ignition operation by the user to the determination that the gas burner has been ignited becomes longer, and the predetermined time A case where normal ignition is not performed in (ts-t0) and an ignition error occurs, which is indicated by a broken line, will be described.

At time point t0, when the ignition operation is performed by the user as shown in the figure (a), the main solenoid valve 28 is opened and the flow rate corresponding to the ignition operation is performed as shown in the figure (b). The control valves 29 to 31 are opened as shown in FIG. 3C, and the supply of fuel gas to the stove burners 2a to 2c corresponding to the ignition operation is started.

Further, as shown in FIG. 3D, the igniters 22a to 22c corresponding to the ignition operation are driven (ON), and spark discharge is generated in the corresponding spark plugs 14a to 14c.

Despite the spark discharge of the spark plugs 14a to 14c, the flame does not easily occur. For example, at time point t3, a flame is generated as shown by the broken line in the figure (e), and as shown by the broken line in the figure (f). In addition, a flame is detected by the thermocouples 15a to 15c corresponding to the spark plug operation, and an electromotive force is generated.

The flame is generated slowly, and the electromotive force of the thermocouples 15a to 15c corresponding to the ignition operation is ignited by the time point ts when the predetermined time (ts-t0) elapses as shown by the broken line in the figure (f). It is not possible to reach the threshold voltage Vs for determining the presence or absence of. Therefore, at the time point ts, as shown by the broken lines in FIGS. (B) and (c), the main solenoid valve 28 and the corresponding flow control valves 29 to 32 are closed to stop the supply of fuel gas, and at the same time As shown by the broken line in the figure (d), the drive of the igniters 22a to 22c corresponding to the ignition operation is stopped to end the ignition operation, and the combustion lamp blinks as shown by the broken line in the figure (h). To notify the user that the ignition error has occurred. With the stop of the ignition operation at the time point ts, the flame is extinguished as shown by the broken line in the figure (e), and the thermocouples 15a to 15c corresponding to the ignition operation are shown in the broken line in the figure (f). The electromotive force decreases.

In the example of FIG. 3, the flame is generated at the time point t3 within the predetermined time (ts-t0), but the same figure (f) also shows the case where the flame is not generated within the predetermined time (ts-t0). Since the electromotive force of the indicated thermocouple does not occur and the threshold voltage Vs for determining the presence or absence of ignition is not reached, an ignition error occurs.

Next, an example of the time chart of the present embodiment in which the predetermined time is variable within a predetermined upper limit time will be described with reference to FIG. FIG. 4 corresponds to FIG. 3, and similarly to FIG. 3, FIG. 4A is an ignition operation (ignition command) by the user, and FIG. 4B is an opening / closing of the original electromagnetic valve 28. 4 (c) shows the open / closed state of the flow control valves 29 to 31, FIG. 4 (d) shows the drive (energized) state of the igniters 22a to 22c, and FIG. 4 (e) shows the flame state of the control burners 2a to 2c. 4 (f) shows the output (electromotive force) of the thermocouples 15a to 15c as the flame detection sensor, FIG. 4 (g) shows the ignition determination result, and FIG. 4 (h) shows the state of the combustion lamp.

In FIG. 4, the solid line and the broken line correspond to the case of the solid line and the broken line in FIG. 3, respectively.

In FIG. 4, the predetermined time is lengthened within a predetermined upper limit time, and specifically, the predetermined time (ts'-t0) is higher than the predetermined time (ts-t0) in FIG. Therefore, the time from the time point ts to the time point ts'is long. This predetermined time (ts'−t0) is, for example, 10 seconds.

First, as shown by the solid line in FIG. 4, when the ignition operation (ignition command) is performed by the user as shown in the figure (a) at the time point t0, the original as shown in the figure (b). The solenoid valve 28 is opened, and the flow control valves 29 to 31 corresponding to the ignition operation are opened as shown in FIG. 3C, and the fuel gas to the stove burners 2a to 2c corresponding to the ignition operation is opened. Supply is started.

Further, as shown in FIG. 3D, the igniters 22a to 22c corresponding to the ignition operation are driven (ON), and spark discharge is generated in the spark plugs 14a to 14c corresponding to the ignition operation. As a result, as shown in the figure (e), for example, at the time point t1, a flame is generated in the stoves 2a to 2c corresponding to the ignition operation, and as shown in the figure (f), the thermoelectric force corresponding to the ignition operation is generated. A flame is detected by the thermocouples 15a to 15c and an electromotive force is generated.

FIG. As shown in (g), it is determined that the ignition has occurred, the ignition determination result becomes a high level, the driving of the igniters 22a to 22c is stopped as shown in the figure (d), and the figure (h) shows. As shown, the combustion lamp lights up, notifying the user that combustion has started, and continuing the combustion state.

The above is the same as the case where the ignition shown by the solid line in FIG. 3 is normally performed.

Next, for example, because the supply pressure of the fuel gas in the place where the gas cooker is installed is low, the time required from the ignition operation by the user to the determination that the gas burner is ignited becomes long, and the above figure In 3, the case where the ignition error shown by the broken line occurs will be described.

At time point t0 in FIG. 4, when the ignition operation is performed by the user as shown in FIG. 4A, the original solenoid valve 28 is opened and the ignition operation is performed as shown in FIG. 4B. The corresponding flow control valves 29 to 31 are opened as shown in FIG. 3C, and the supply of fuel gas to the stove burners 2a to 2c corresponding to the ignition operation is started.

Further, as shown in FIG. 3D, the igniters 22a to 22c corresponding to the ignition operation are driven (ON), and spark discharge is generated in the spark plugs 14a to 14c corresponding to the ignition operation.

Despite the spark discharge of the spark plugs 14a to 14c, the flame does not easily occur. For example, at time point t3, a flame is generated as shown by the broken line in the figure (e), and as shown by the broken line in the figure (f). In addition, a flame is detected by the thermocouples 15a to 15c corresponding to the spark plug operation, and an electromotive force is generated.

The flame is generated slowly, and it takes a long time for the electromotive force of the corresponding thermocouples 15a to 15c to reach the threshold voltage Vs for determining the presence or absence of ignition, as shown by the broken line in the figure (f). However, as described above, the predetermined time (ts'-t0) is extended to make it longer. As a result, the electromotive force of the thermocouples 15a to 15c corresponding to the ignition operation reaches the threshold voltage Vs for determining the presence or absence of ignition at the time point t4 within the predetermined time (ts'-t0), and the figure (Fig. As shown by the broken line of g), it is determined that the ignition has occurred, and the ignition determination result becomes a high level. As a result, the drive of the igniters 22a to 22c is stopped as shown by the broken line in the figure (d), and the combustion lamp is turned on as shown by the broken line in the figure (h), and the user starts combustion. Notify that, and continue the combustion state.

In the conventional example of FIG. 3 in which the predetermined time is fixed for a fixed time in this way, even if an ignition error occurs, the predetermined time is variable within a predetermined upper limit time and is predetermined as shown in FIG. If the time is lengthened, normal ignition will be performed without an ignition error.

The predetermined upper limit time is a time during which the explosive ignition of the stoves 2a to 2c does not occur, and is preferably as long as possible, for example, 16 seconds.

In this way, the predetermined time is variable within a predetermined upper limit time during which the explosive ignition of the stoves 2a to 2c does not occur, so that the explosive ignition can be avoided and the predetermined time is set by the user. Since the time can be set according to the time required from the ignition operation of the gas burner to the ignition determination of the gas burner, the occurrence of an ignition error can be suppressed and the usability is improved.

Next, a more specific embodiment will be described with reference to the flowchart.

FIG. 5 is a flowchart showing variable processing for a predetermined time according to the embodiment of the present invention.

In FIG. 5, a predetermined time is predetermined according to whether or not the gas stove A with a grill is installed in a new installation location, the combustion stop time of the stove burners 2a to 2c, and the temperature of the stove burners 2a to 2c. It is variable within the upper limit time, for example, within 16 seconds.

First, when the ignition operation by the user, that is, the ignition command is given (step S1), it is determined whether or not there is an ignition history at the new installation location (step S2).

When the gas stove A with a grill is installed in a new installation location, for example, in a newly built apartment, it takes time for the fuel gas to reach the gas stove A with a grill because the gas pipe of the fuel gas is long. Therefore, even if the ignition operation is performed, the ignition cannot be ignited within a predetermined time, an ignition error occurs, and the ignition operation and the ignition error are repeated.

Therefore, in this embodiment, when the control unit 40 as the installation state detection unit detects that the gas stove A with the grill is installed in the new installation location in step S2, the ignition is performed at the new installation location. It is determined whether there is a history, that is, whether there is a history of the first ignition determination determined to have ignited at the new installation location. When there is no ignition history at the new installation location, the gas stove A with a grill has not been installed at the new installation location and has not yet ignited. , The ignition operation is started (step S4).

In this way, until the gas stove A with a grill is installed in the new installation location and the first ignition is confirmed, the predetermined time is lengthened, so the number of times the ignition operation and ignition error are repeated is longer than when the predetermined time is short. Can be reduced. As a result, it is possible to reduce the workload of the operator when installing the gas stove A with a grill in a new installation location.

When it is determined in step S2 that there is an ignition history at the new installation location, the gas stove A with a grill is assumed to have been installed at the new installation location and has already been ignited and ignited, and the process proceeds to step S5.

When the combustion stop time of the stove burner is long, the fuel gas in the gas pipeline is diluted or replaced by air, so that the time required from the ignition operation of the user to the ignition determination of the stove burner becomes long. Therefore, in step S5, it is determined whether or not the combustion stop time of the ignition-operated stoves 2a to 2c is equal to or longer than the threshold time tm. This threshold time tm can be set in a relatively wide time range, and may be, for example, about 5 hr.

In step S5, when the combustion stop time of the control burners 2a to 2c corresponding to the ignition operation is equal to or longer than the threshold time tm, a long time has passed since the combustion was stopped. Assuming that the time required for the ignition determination of 2a to 2c becomes long, the process proceeds to step S3, and the ignition operation is started with the predetermined time being long within the upper limit time, for example, 10 seconds (step S4).

In step S5, when the combustion stop time of the ignition-operated stove burner is not equal to or longer than the threshold time tm, that is, when a long time has not passed since the combustion was stopped, the process proceeds to step S6.

The lower the temperature of the stove burners 2a to 2c, the lower the temperature of the fuel gas, and the lower the temperature, the narrower the gas explosion limit, which may make it difficult to ignite. Therefore, in step S6, it is determined whether or not the temperature detected by the temperature sensors 7a to 7c corresponding to the ignition-operated stove burners 2a to 2c is equal to or less than the threshold temperature TL. The threshold temperature TL may be, for example, about 20 ° C.

In step S6, when the temperature detected by the temperature sensors 7a to 7c corresponding to the ignition-operated stoves 2a to 2c is equal to or less than the threshold temperature TL, the temperature of the ignition-operated stoves 2a to 2c is low and the user. Assuming that the time required from the ignition operation of the stove burners 2a to 2c to the ignition determination of the stove burners 2a to 2c becomes long, the process proceeds to step S3, and the predetermined time is set to be long within the upper limit time, for example, 10 seconds, and the ignition operation is started (step S4). ..

In step S6, when the temperature detected by the temperature sensor is not equal to or lower than the threshold temperature TL, the temperature of the stove burners 2a to 2c is high, and the time required from the ignition operation of the user to the ignition determination of the stove burners 2a to 2c is relatively long. Assuming that it may be shorter, the process proceeds to step S7, and the predetermined time is shortened, for example, 5 seconds to start the ignition operation (step S4).

As described above, according to the present embodiment, when the gas stove A with a grill A is installed in a new installation place, the number of ignition operations and ignition errors can be reduced, and the work load on the operator is reduced. Further, since the predetermined time is changed within a predetermined upper limit time according to the combustion stop time of the stove burners 2a to 2c and the temperature of the stove burners 2a to 2c, explosive ignition is avoided. The occurrence of ignition error can be suppressed and usability is improved.

FIG. 6 is a flowchart showing variable processing for a predetermined time according to another embodiment of the present invention.

In FIG. 6, a predetermined time is changed within a predetermined upper limit time, for example, within 16 seconds, depending on the ignition heating power of the stove burners 2a to 2c.

First, when the ignition operation by the user, that is, the ignition command is given (step S10), it is determined whether or not the ignition thermal power of the stoves 2a to 2c corresponding to the ignition operation is 1500 kcal / h or less (step S11). ), When the ignition thermal power is 1500 kcal / h or less, it is assumed that the ignition thermal power is a relatively small small thermal power stove burner 2c, and the process proceeds to step S12. In step S12, since the stove burner 2c has a small thermal power, it is considered that explosive ignition is unlikely to occur even if the predetermined time is long, and the predetermined time is set to a long time within the upper limit time, for example, 15 seconds, and the ignition operation is started. (Step S13).

In step S11, when the ignition thermal power is not 1500 kcal / h or less, it is determined whether or not the ignition thermal power of the stove burner corresponding to the ignition operation is 3000 kcal / h or less (step S14). When the ignition power is 3000 kcal / h or less, the process proceeds to step S15. In step S15, assuming that the ignition thermal power is more than 1500 kcal / h and 3000 kcal / h or less, and the ignition thermal power is the Konarovana 2a of medium standard thermal power, the predetermined time is a medium length within the upper limit time. For example, the ignition operation is started in 10 seconds (step S13).

If the ignition power is not 3000 kcal / h or less in step S14, the process proceeds to step S16. In step S16, the stove burner 2b has a relatively large ignition power, and if the predetermined time is long, explosive ignition is likely to occur. Therefore, the predetermined time is shortened, for example, 5 seconds, and the ignition operation is started. (Step S13).

As described above, according to the present embodiment, the predetermined time is changed within a predetermined upper limit time according to the ignition thermal power of the stove burners 2a to 2c, so that the ignition error can be avoided while avoiding explosive ignition. Occurrence can be suppressed and usability is improved.

The magnitude of the ignition thermal power does not necessarily have to be determined according to the maximum thermal power of the stove burner. For example, the stove burner having a high thermal power and the stove burner having a standard thermal power may have the same ignition thermal power.

The predetermined time can be variably set by the user himself / herself as follows.

FIG. 7A is a diagram showing a part of the cooking setting input unit 12 for the grill, and FIG. 7B is a diagram showing a part of the cooking setting input unit 13 for the gas stove.

When the user himself / herself variably sets the predetermined time, for example, the “+” key 45a or the “-” key 45b of the stove timer 45 of the cooking setting input unit 13 for the gas stove, and the high temperature stir-fry key 46 of the left stove. Press at the same time for 5 seconds or longer to start the setting mode that changes the predetermined time.

In this setting mode, for example, the "+" key 47a and the "-" key 47b of the grill timer 47 of the grill cooking setting input unit 12 are operated to select an item number corresponding to a variable setting for a predetermined time (grill timer). Display the item number on 47). After selecting the item number, operate the "+" key 45a and the "-" key 45b of the stove timer 45 of the cooking setting input unit 13 for the gas stove to set any number from "01" to "15". By (displaying the predetermined time set in the stove timer 45), the time from 1 second to 15 seconds can be set individually or collectively in 1 second units for each stove burner within the upper limit time as the predetermined time. Variable setting.

After that, press the "+" key 45a or "-" key 45b of the stove timer 45 of the cooking setting input unit 13 for the gas stove and the high temperature stir-fry key 48 of the right stove at the same time for 5 seconds or more to change the setting mode to change the predetermined time. finish.

In the above embodiment, the installation state detection unit that detects that the gas stove A with a grill is installed in the new installation location is installed in the new installation location when the battery is first set in the battery box after shipment. However, as another embodiment, when the gas stove A with a grill is installed in a new installation location, the installation state detection unit performs the required operation to move the gas stove A with a grill to the new installation location. It may be made to detect that it has been installed.

As this required operation, for example, by setting the dry battery in the battery box while pressing the rice cooker / water heater key 49 on the left stove or the rice cooker / water heater key 50 on the right stove of the cooking setting input unit 13 for the gas stove, a new installation location It may be made to detect that it is installed in.

Further, as another embodiment, the gas stove A with a grill uses a commercial power supply (100V power supply), and the installation state detection unit for detecting that the gas stove A with a grill is installed at a new installation location is a gas stove with a grill after shipment. When it is first connected to a commercial power supply (100V power supply), the installation state detection unit may detect that it has been installed in a new installation location.

Of course, the above-mentioned variable setting for a predetermined time by the user himself and the key operation in the necessary operation for detecting that the gas stove A with a grill is installed in a new installation place are not limited to the above. Is.

Further, the present invention is not limited to the embodiments shown in FIGS. 5 and 6, and some or all of them may be combined as appropriate.

For example, the predetermined time may be changed only by the combustion stop time of the stove burner in FIG. 5, the predetermined time may be changed only by the detection temperature of the stove burner, or the combustion stop time of the stove burner or the stove burner. The detection temperature and the ignition thermal power of the stove burner shown in FIG. 6 may be appropriately combined to change the predetermined time.

Further, the predetermined time when there is no ignition history at the new installation location may be longer (for example, 15 seconds) than other conditions.

As another embodiment of the present invention, the predetermined time may be changed linearly within a predetermined upper limit time according to the combustion stop time of the stove burner, the detection temperature, the ignition thermal power, and the like.

2a-2c stove burner 3 grill part
7a-7c, 21 Temperature sensor 8a-8c Heating condition control unit 12 Cooking setting input unit for grill 13 Cooking setting input unit for gas stove 14a-14c, 17a, 17b Spark plug 15a-15c, 18a, 18b Thermocouple 16a, 16b Grill burner 22a-22e Igniter 28 Original electromagnetic valve 29-32 Flow control valve 40 Control unit A Gas stove with grill

Claims (9)

A gas burner to which fuel gas is supplied, a spark plug that ignites the gas burner, an igniter to which the spark plug is electrically connected, an operation unit that is ignited to ignite the gas burner, and a flame of the gas burner. A gas including a flame detection sensor for detecting the fuel gas and a control means for controlling the igniter while controlling the supply of fuel gas to the gas burner based on the ignition operation of the operation unit and the detection output of the flame detection sensor. It ’s a cooker,
The control means includes a determination unit for determining whether or not the gas burner is ignited based on the detection output of the flame detection sensor.
The control means starts supplying fuel gas to the gas burner and starts driving the igniter in response to the ignition operation of the operation unit to generate a spark discharge in the spark plug, and the ignition operation. If it is determined by the determination unit that the gas burner has been ignited by the time when the predetermined time elapses, the drive of the igniter is stopped, and the determination unit does not determine that the gas burner has been ignited. After a lapse of time, the supply of fuel gas to the gas burner is stopped and the drive of the igniter is stopped.
The control means changes the predetermined time within a predetermined upper limit time.
A gas cooker that features that. Equipped with multiple gas burners with different ignition powers,
The control means changes the predetermined time according to the ignition thermal power of the gas burner, and the smaller the ignition thermal power of the gas burner, the longer the predetermined time.
The gas cooker according to claim 1. The control means includes a time measuring unit for measuring the combustion stop time of the gas burner.
The control means changes the predetermined time according to the combustion stop time, and the longer the combustion stop time, the longer the predetermined time.
The gas cooker according to claim 1 or 2. A temperature detector for detecting the temperature of the gas burner is provided.
The control means changes the predetermined time according to the detection temperature of the temperature detection unit, and the lower the detection temperature, the longer the predetermined time.
The gas cooker according to any one of claims 1 to 3. The temperature detection unit is a temperature sensor that detects the temperature of the object to be heated by the gas burner.
The gas cooker according to claim 4. A setting operation unit operated to set the predetermined time is provided.
The control means changes the predetermined time according to the setting operation of the setting operation unit.
The gas cooker according to any one of claims 1 to 5. Equipped with an installation status detector that detects that the gas cooker has been installed in a new installation location.
The control means changes the predetermined time based on the detection output of the installation state detection unit, and the gas burner is used in the determination unit by an ignition operation in which the gas cooker is installed at a new installation location. Until it is first determined that the gas has ignited, the predetermined time is set longer than the subsequent predetermined time.
The gas cooker according to any one of claims 1 to 6. The power source of the control means is a replaceable battery or a commercial power source (100V power source) loaded in the battery loading unit.
The installation state detector detects that the battery was installed in a new installation location when it was first loaded into the battery loading unit or when it was first connected to the commercial power supply (100V power supply). do,
The gas cooker according to claim 7. A plurality of the gas burners are arranged on the top plate of the gas cooker.
The control means changes the predetermined time according to the position of the gas burner on the top plate, and the farther the position of the gas burner is from the user, the longer the predetermined time.
The gas cooker according to any one of claims 1 to 8.

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