JP2018194190A - Stationary stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stationary stove capable of preventing an erroneous detection of the occurrence of an earthquake according to an operation for starting or stopping an operation of a heat generating portion or a malfunction corresponding to the erroneous detection. .. SOLUTION: A base 2 mounted on a base S, heat generating parts 3a and 3b mounted on the base 2, and an operation unit 8a for performing an operation for starting or stopping the operation of the heat generating parts 3a and 3b. , 8b, 8c, an acceleration sensor 24 that detects the acceleration generated on the substrate 2, and a control unit that detects the occurrence of an earthquake based on the output of the acceleration sensor 24 and executes earthquake response processing in response to the detection of the occurrence of an earthquake. 25 and. The control unit 25 invalidates the detection of the occurrence of an earthquake based on the output of the acceleration sensor 24 for a predetermined period immediately after the operation of the operation units 8a, 8b, 8c. [Selection diagram] Fig. 3

Description

  The present invention relates to a stationary stove such as a gas stove.

  A stationary stove such as a gas stove that is placed on a base and used is generally known (see, for example, Patent Document 1).

  Further, as seen in Patent Document 2, for example, an acceleration sensor is mounted on a combustion-type cooking apparatus, and the occurrence of an earthquake is detected based on the output of the acceleration sensor. One that automatically stops operation is known.

JP 2004-205177 A JP 2010-107148 A

  It is conceivable to install an acceleration sensor on a stationary stove so that the occurrence of an earthquake can be detected. However, in this case, it has been found from various experiments and examinations by the present inventors that the following problems occur.

  That is, since the stationary stove is generally placed in a non-fixed state on the base, it can move on the base when an external force is applied. And when starting the operation of the heat generating part such as the burner of the stationary stove, or when stopping the operation, the base of the stationary stove is usually used to push the operation part of the stationary stove. An external force having a magnitude larger than a certain level is likely to act, and as a result, minute movements, vibrations, etc. of the base of the stationary stove are likely to occur.

  In this case, according to various experiments and examinations by the inventors of the present application, in a stationary stove equipped with an acceleration sensor for earthquake detection, at the time of operation of the operation unit for starting or stopping the operation of a heating unit such as a burner, As described above, when the movement of the base of the stationary stove occurs, the change pattern of acceleration generated in the acceleration sensor is often similar to that at the time of the occurrence of an earthquake.

  For this reason, the occurrence of an earthquake is likely to be erroneously detected when operating the operation unit for starting or stopping the operation of a heat generating unit such as a burner, and as a result, the operation of the heat generating unit is forced even though no earthquake has occurred. The inconvenience that the earthquake response processing such as stopping at the same time is executed is likely to occur.

  The present invention has been made in view of such a background, and an occurrence of an earthquake is erroneously detected according to an operation for starting or stopping operation of a heat generating portion, or a malfunction according to the erroneous detection occurs. An object of the present invention is to provide a stationary stove that can be prevented.

In order to achieve the above object, the stationary stove of the present invention includes a base placed on a base, a heat generating part mounted on the base, and an operation for starting or stopping the operation of the heat generating part. An operation unit mounted on the base body so as to be able to perform, an acceleration sensor mounted on the base body so as to detect an acceleration generated on the base body, and the occurrence of an earthquake are detected based on the output of the acceleration sensor A control unit that executes predetermined earthquake response processing in response to detection of the occurrence of the earthquake,
The control unit is configured to invalidate the detection of the occurrence of an earthquake based on the output of the acceleration sensor for a predetermined period immediately after the operation of the operation unit (first invention).

  Here, in the present invention, “disabling the detection of the occurrence of an earthquake based on the output of the acceleration sensor” more specifically means a process of detecting the occurrence of an earthquake based on the output of the acceleration sensor. This means that the earthquake handling process is not executed, regardless of whether it is executed or not based on the detection result of the process for detecting the occurrence of an earthquake.

  According to the first aspect, since the control unit invalidates the detection of the occurrence of the earthquake based on the output of the acceleration sensor for a predetermined period immediately after the operation of the operation unit, start or stop operation of the heat generating unit. For this reason, when the operation unit is operated, it is possible to prevent the occurrence of an earthquake from being erroneously detected according to the operation or the occurrence of a malfunction according to the erroneous detection.

  In addition, the said earthquake response process may include the process which stops the driving | operation of the heat generating part in driving | operation.

  In the first invention, a plurality of the heat generating units and a plurality of the operation units respectively corresponding to the plurality of heat generating units may be provided. In this case, when the predetermined period is a period of a predetermined time width, the control unit is configured such that the operation unit corresponding to any one of the plurality of heat generating units is the heat generating unit. Immediately after the operation to start the operation, the operation unit corresponding to the other heat generating unit is operated so as to start the operation of the other heat generating unit before the period of the predetermined time width elapses. In such a case, it is preferable that the timing of the predetermined time width is restarted (second invention).

  According to this, even when the operation for starting the operation of the plurality of heat generating units is continuously performed at a time interval shorter than the predetermined time width, the detection of the occurrence of the earthquake based on the output of the acceleration sensor is invalidated. It is possible to appropriately set the period to be performed to prevent an occurrence of an earthquake from being erroneously detected or causing a malfunction according to the erroneous detection.

FIG. 1A is a plan view of a stationary stove according to an embodiment of the present invention, and FIG. 1B is a front view of the stationary stove according to the embodiment. The block diagram which shows the structure which concerns on control of the stationary stove of embodiment. The flowchart which shows the process of the control part shown in FIG.

  One embodiment of the present invention will be described below with reference to FIGS. With reference to FIG. 1A and FIG. 2B, the stationary stove 1 of this embodiment is a gas stove, for example. The stationary stove 1 (hereinafter referred to as gas stove 1) includes a casing 2 as a base, a plurality (two in the illustrated example) of stove burners 3a and 3b disposed on the upper surface of the casing 2, and each stove. The five virtues 4a and 4b arranged on the upper surface of the casing 2 around the burners 3a and 3b, and the grill box 5 formed inside the casing 2 are provided. The grill cabinet 5 is provided with a grill burner (not shown). An exhaust port 6 for exhausting the grill 5 is formed at the rear of the upper surface of the housing 2. In the present embodiment, the stove burners 3a and 3b and the grill burner correspond to the heat generating portion in the present invention.

  In the present embodiment, the stove burners 3 a and 3 b are respectively disposed on the left side and the right side of the upper surface of the housing 2. Hereinafter, the stove burner 3a may be referred to as the left stove burner 3a, and the stove burner 3b may be referred to as the right stove burner 3b.

  A plurality of leg portions 7 project from the bottom surface of the housing 2. Each leg part 7 is comprised by elastic members, such as rubber | gum, for example. And the housing | casing 2 is mounted via the leg part 7 on the base S of the use environment of the gas stove 1. FIG. In this mounted state, the casing 2 is not fixed to the base S, but in a normal state in which the lateral external force acting on the casing 2 is sufficiently small, each leg portion made of an elastic member such as rubber is used. The casing 2 is prevented from moving on the base S by the frictional force generated between the base 7 and the base S. However, when the ignition / fire extinguishing operation portions 8a, 8b, and 8c described later are operated, minute movements of the housing 2 may occur due to slipping of the leg portions 7, elastic deformation of the leg portions 7, or the like.

  On the front surface of the housing 2 are ignition / fire extinguishing operation portions 8a, 8b, 8c for performing the respective ignition operations and fire extinguishing operations of the stove burners 3a, 3b and the grill burner, and the stove burners 3a, 3b and the grill burner, respectively. Thermal power adjustment levers 9a, 9b, 9c for performing thermal power adjustment operations are attached, and opening / closing door 5a of grill cabinet 5 and opening / closing of battery housing portion 10 for housing power battery BAT (shown in FIG. 2). A lid 10a is provided.

  In the following description, when it is not necessary to distinguish between the burners 3a and 3b and the grill burner, each is simply referred to as the burner 3. Similarly, each of the ignition / fire extinguishing operation units 8a, 8b, and 8c may be referred to as an ignition / fire extinguishing operation unit 8, and each of the thermal power adjustment levers 9a, 9b, and 9c may be referred to as a thermal power adjustment lever 9.

  Each ignition / extinguishing operation unit 8 corresponds to an operation unit in the present invention. Each of the ignition / fire extinguishing operation sections 8 is a push button type operation section having a known structure, and by performing the push operation, the burner 3 corresponding to the ignition / fire extinguishing operation section 8 is ignited and extinguished. Is called.

  For example, when the left stove burner 3a is ignited, by pressing the ignition / extinguishing operation unit 8a, the micro switch 21a (shown in FIG. 2) corresponding to the ignition / extinguishing operation unit 8a is closed. The ignition / fire extinguishing operation unit 8a is held in the pushed-in state. And according to closing of the microswitch 21a, the left stove burner 3a is ignited by the control process of the control part 25 mentioned later.

  Further, when the left stove burner 3a is extinguished, the pushing operation of the ignition / fire extinguishing operation portion 8a is performed again, so that the pushing state of the ignition / fire extinguishing operation portion 8a is released, and the ignition / fire extinguishing operation portion 8a is not shown. The microswitch 21a corresponding to the ignition / fire extinguishing operation portion 8a returns to the open state while returning to the original position (position not pushed in) by the biasing force of the spring. And according to opening of the microswitch 21a, the left stove burner 3a is extinguished by the control process of the control part 25 mentioned later.

  The ignition and extinguishing operations of the right stove burner 3b and the grill burner are the same as described above. The microswitch 21b shown in FIG. 2 is a microswitch that opens and closes in response to the operation of the ignition / extinguishing operation unit 8b for the right burner 3b, and the microswitch 21c is used for the operation of the ignition / extinguishing operation unit 8c for the grill burner. It is a micro switch that opens and closes accordingly.

  In the following description, when there is no need to distinguish between the microswitches 21a, 21b, and 21c, each is referred to as a microswitch 21.

  Each heating power adjusting lever 9 is a slide type lever. Each thermal power adjusting lever 9 adjusts the opening degree of a thermal power adjusting valve (not shown) interposed in the gas passage for supplying fuel gas to the burner 3 corresponding to the thermal power adjusting lever 9 according to the sliding operation. It is engaged with the thermal power adjustment valve so as to change (and consequently change the amount of fuel gas supplied to the burner 3).

  In addition, while using an electrically operated thermal power control valve as a thermal power control valve corresponding to each burner 3, the amount of slide of each thermal power control lever 9 is detected by a displacement amount sensor such as a potentiometer, and the electric power is controlled according to the detected value. It is also possible to drive a thermal power control valve of the type.

  A substrate 15 on which a plurality of electronic circuit elements are mounted is disposed at an appropriate position inside the housing 2, for example, at a lateral position of the battery housing 10. The substrate 15 is fixed to the housing 2 via a bracket or the like (not shown).

  In the present embodiment, as shown in FIG. 2, for example, the substrate 15 has an ignition / fire extinguishing operation signal input circuit 22 to which the micro switches 21a, 21b, and 21c are connected, and a power source connected to the power battery BAT. A circuit 23, an acceleration sensor 24 that generates and outputs a detection signal corresponding to the acceleration, and a control unit 25 that controls operation of the gas stove 1 are mounted. These electronic circuit elements may be distributed and mounted on a plurality of substrates.

  The ignition / fire extinguishing operation signal input circuit 22 is a power circuit when any one of the microswitches 21 is closed (when an ignition operation of any one of the burners 3 is performed). 23, and a signal indicating the open / closed state of each microswitch 21 is output to the control unit 25.

  When the power supply circuit 23 is activated by the ignition / fire extinguishing operation signal input circuit 22, the power supply circuit 23 generates a power supply voltage of a predetermined voltage from the power of the power supply battery BAT and supplies the power supply voltage to the control unit 25. 25 is activated.

  The acceleration sensor 24 is a triaxial acceleration sensor in this embodiment, and outputs a detection signal corresponding to the translational acceleration in each direction of the three detection axes to the control unit 25. In this case, since the acceleration sensor 24 is fixed to the housing 2 via the substrate 15, the acceleration detected by the acceleration sensor 24 is a translational acceleration generated in the housing 2 at the position where the acceleration sensor 24 is disposed. .

  The control unit 25 is a circuit unit including a CPU, a RAM, a ROM, an interface circuit, and the like. This control unit 25 is a function realized by the implemented hardware configuration and program (software configuration), and the ignition gas igniter 27 of each burner 3, the burners 3a and 3b, and the fuel gas corresponding to each of the grill burners. Each burner 3 is controlled by controlling the gas electromagnetic valves 28a, 28b, 28c (hereinafter simply referred to as the gas electromagnetic valve 28) interposed in each supply path so that the supply path can be opened and closed. A function for controlling the ignition and extinguishing of the engine, a function for detecting the occurrence of an earthquake with a predetermined seismic intensity or more based on the output of the acceleration sensor 24, and a control process corresponding to the occurrence of the occurrence of the earthquake. And a function of executing an earthquake response process.

  Next, the operation of the gas stove 1 of this embodiment, particularly the operation related to the detection of the occurrence of an earthquake will be described with reference to the flowchart of FIG.

  When the ignition operation (pushing operation) of the ignition / extinguishing operation unit 8 for any one of the burners 3 is performed by the user while all the burners 3 are extinguished, the power supply circuit 23 is activated and the control unit 25 is supplied with the power supply voltage. Is supplied (power ON). Thereby, the control part 25 starts and this control part 25 performs the process from STEP1.

  In STEP 1, the control unit 25 executes a control process for igniting the burner 3 to be ignited (the burner 3 corresponding to the ignition / extinguishing operation unit 8 that has been ignited). In this control process, the control unit 25 controls the opening of the gas electromagnetic valve 28 in the fuel gas supply path corresponding to the burner 3 to be ignited while driving the igniter 27. Thus, while the fuel gas is supplied to the burner 3 to be ignited, a spark discharge is generated by the discharge electrode (not shown) disposed in the vicinity of the burner 3, and the burner 3 is ignited.

  The igniter 27 is shared by all the burners 3, and by driving the igniter 27, spark discharge occurs in all the burners 3 (3a, 3b, 3c) including the burner 3 to be ignited. To do.

  In STEP 2, the control unit 25 further starts timing by an earthquake detection invalid timer that counts a predetermined time (for example, 2 seconds) that is a time width of a period in which the detection of the occurrence of an earthquake based on the output of the acceleration sensor 24 is invalidated. .

  Next, in STEP 3, the control unit 25 indicates whether or not a new ignition operation has been performed on another burner 3 other than the ignited burner 3 (signals input from the ignition / fire extinguishing operation signal input circuit 22 (each microswitch). 21 based on a signal indicating the open / closed state of 21).

  If the determination result in STEP 3 is affirmative, the control unit 25 executes a control process for igniting a new ignition target burner 3 in STEP 9 in the same manner as in STEP 1, and further in STEP 10, detects an earthquake. After the time counting by the invalid timer is started again, the determination process in STEP 3 is executed again.

  If the determination result in STEP 3 is negative, the control unit 25 determines whether or not the fire extinguishing operation (pushing operation) of the ignition / fire extinguishing operation unit 8 corresponding to any burner 3 in the combustion operation is performed in STEP 4. Is determined based on a signal input from the ignition / fire extinguishing operation signal input circuit 22.

  When the determination result in STEP 4 is negative (when the combustion operation of one or more burners 3 during the combustion operation is continued), the control unit 25 next uses an earthquake detection invalid timer in STEP 5. Determining whether the timing has ended (in other words, out of one or more burners 3 in the combustion operation, whether the elapsed time after ignition of the burner 3 that was ignited last has reached a predetermined time) To do.

  If the determination result in STEP 5 is negative (in other words, the state immediately after ignition of the burner 3 that was ignited last), the control unit 25 repeats the processing from STEP 3.

  On the other hand, when the time measurement by the earthquake detection invalid timer is completed and the determination result in STEP 5 is affirmative, the control unit 25 performs an earthquake detection process based on the output of the acceleration sensor 24 (above a predetermined seismic intensity or higher) in STEP 6. In step 7, it is determined whether or not an earthquake has been detected.

  If the occurrence of an earthquake is not detected and the determination result in STEP 7 is negative, the control unit 25 repeats the processing from STEP 3.

  If the occurrence of an earthquake is detected and the determination result in STEP 7 is affirmative, the control unit 25 executes an earthquake response process in STEP 8. In this earthquake response processing, the control unit 25 performs the valve closing control of the gas electromagnetic valve 28 corresponding to each burner 3 during the combustion operation (and thus shuts off the supply of fuel gas to the burner 3), thereby The burner 3 is forcibly extinguished and a notification indicating the forced extinguishing of the burner 3 due to the occurrence of an earthquake is made via a lamp, a buzzer, etc. (not shown).

  In addition, after execution of an earthquake response process, the process from STEP3 is restarted when a user performs ignition operation of one of the burners 3 anew.

  When the determination result in STEP 4 is affirmative (when a fire extinguishing operation is performed on any burner 3 during the combustion operation), the control unit 25 next selects a fire extinguishing target in STEP 11. A control process for extinguishing the burner 3 (the burner 3 corresponding to the ignition / extinguishing operation unit 8 on which the extinguishing operation has been performed) is executed. In this control process, the control unit 25 controls to close the gas electromagnetic valve 28 in the fuel gas supply path corresponding to the burner 3 to be extinguished. As a result, the supply of fuel gas to the burner 3 is shut off, and the burner 3 is extinguished.

  Further, in STEP 12, the control unit 25 determines whether or not all the burners 3 are in the fire extinguishing state, and when the determination result is negative (when the combustion operation of any burner 3 is continued). ) Repeats the processing from STEP 3 after starting the time counting by the earthquake detection invalid timer again in STEP 10.

  When all the burners 3 are extinguished and the determination result in STEP 12 is affirmative, the control unit 25 stops output of the power supply voltage from the power supply circuit 23 in STEP 13 (turns the power off). Then, the power supply circuit 23 is operated. Thereby, gas stove 1 will be in an operation stop state.

  According to the embodiment described above, the period immediately after the ignition operation of any one of the burners 3 (specifically, the period during the time of the earthquake detection invalid timer started in STEP 2 or 10 according to the ignition operation), Alternatively, the period immediately after the fire extinguishing operation of any of the burners 3 (specifically, the period during which the earthquake detection invalid timer started in STEP 10 in response to the fire extinguishing operation) is the STEP 6 related to the detection of the occurrence of an earthquake. , 7 are not executed.

  Here, in the ignition operation or the fire extinguishing operation, any one of the ignition / fire extinguishing operation units 8 is pushed, and a force resulting from the pushing operation acts on the housing 2. Then, due to the mode of the pushing operation, or due to the elasticity of the spring that urges the ignition / fire extinguishing operation unit 8 that has been pushed, or the elasticity of the leg 7 at the bottom of the housing 2, etc. In some cases, the acceleration change pattern generated in the acceleration sensor 24 is similar to the acceleration change pattern when an earthquake occurs.

  However, in the present embodiment, since the processing of STEPs 6 and 7 is not executed in the period immediately after the ignition operation of any burner 3 and the period immediately after the fire extinguishing operation of any burner 3, the ignition operation or The occurrence of an earthquake is prevented from being erroneously detected due to the vibration of the casing 2 and the acceleration sensor 24 generated by the fire extinguishing operation. As a result, the combustion operation of the burner 3 can be continued.

  In addition, when the ignition operation of another burner 3 is performed while the earthquake detection invalid timer started in response to the ignition operation of any one of the burners 3, the timing of the earthquake detection invalid timer is restarted again. The For this reason, even when the ignition operation of the plurality of burners 3 is continuously performed within the predetermined time counted by the earthquake detection invalid timer, it is appropriately realized to prevent the occurrence of the earthquake from being erroneously detected. Can do.

  Further, the processing of STEPs 6 and 7 is executed during the combustion operation of any burner 3 except for the period immediately after the ignition operation of the burner 3 and the period immediately after the fire extinguishing operation of any burner 3. When an earthquake with a predetermined seismic intensity or higher occurs, the burner 3 can be automatically extinguished by the earthquake handling process in STEP 8.

  In the above embodiment, during the time of the earthquake detection invalid timer, the processing of STEPs 6 and 7 is not executed to prevent erroneous detection of the occurrence of an earthquake. However, the process of detecting the occurrence of an earthquake based on the output of the acceleration sensor 24 is sequentially executed while any one of the burners 3 (heating unit) is in operation, and the occurrence of an earthquake is detected while the earthquake detection invalid timer is counting. However, the earthquake response process may not be executed.

  In the above-described embodiment, the gas stove 1 including the two stove burners 3a and 3b and the grill burner has been described as an example. However, the stationary stove of the present invention does not include the grill burner, or three or more stove burners. It is also possible to have one or only one stove burner.

  In addition, the stationary stove of the present invention has, for example, a rotary operation unit that has both an ignition operation and a fire extinguishing operation function and a thermal power adjustment function instead of the ignition / fire extinguishing operation unit 8 and the thermal power adjustment lever 9. It may be provided.

  Furthermore, the stationary stove of the present invention is not limited to a gas stove, and may be a stove including an IH heater or an electric heater as a heat generating part.

DESCRIPTION OF SYMBOLS 1 ... Stationary type stove (gas stove), 2 ... Housing | casing (base | substrate), 3 (3a, 3b) ... Burner (heat generating part), 8 (8a, 8b, 8c) ... Ignition / extinguishing operation part (operation part), 24 ... acceleration sensor, 25 ... control unit.

Claims (2)

A base placed on a base, a heat generating part mounted on the base, an operation part mounted on the base so that an operation for starting or stopping the operation of the heat generating part can be performed, and The occurrence of an earthquake is detected based on the acceleration sensor mounted on the base so that the acceleration generated on the base can be detected, and the output of the acceleration sensor, and the earthquake response processing is executed in response to the detection of the occurrence of the earthquake And a control unit,
The stationary stove configured to invalidate detection of occurrence of an earthquake based on an output of the acceleration sensor for a predetermined period immediately after operation of the operation unit. The stationary stove according to claim 1,
A plurality of the heat generation units, and a plurality of the operation units respectively corresponding to the plurality of heat generation units, the predetermined period is a period of a predetermined time width, and the control unit Immediately after the operation unit corresponding to any one of the heat generating units is operated to start operation of the heat generating unit, another heat generation is performed before the predetermined time width period elapses. When the operation unit corresponding to the unit is operated to start the operation of the other heat generation unit, the time measurement of the period of the predetermined time width is restarted again. A stationary stove.