JP2006138570A - Gas cooking stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas cooking stove for adjusting a combustion quantity without botheration of a user. <P>SOLUTION: A switching valve 14 switches over a gas flow passage to the ordinary gas supply pipe 21 side and the energy-saving gas supply pipe 22 side. An energy-saving gas supply pipe 22 is designed finer than an ordinary gas supply pipe 21, and when switched to the energy-saving gas supply pipe 22 (an energy-saving mode), a gas quantity sent to a burner 2 reduces, and thermal power becomes weak. That is, even if maximum thermal power is set by a thermal power adjusting lever 7 in the energy-saving mode, a maximum combustion quantity of a built-in cooking stove 1 is not provided, to become weaker thermal power. When switched over to the ordinary gas supply pipe 21 side (a normal mode), the maximum combustion quantity of the built-in cookstove 1 is provided. Valve opening of the switching valve 14 becomes the energy-saving mode when an energy-saving switch 5 is pushed in the normal mode, and becomes the energy-saving gas supply pipe 22 side, and becomes the normal mode when the energy-saving switch 5 is pushed in the energy-saving mode, and becomes the ordinary gas supply pipe 21 side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas stove, and more particularly, to a gas stove provided with a combustion amount adjusting means for adjusting the combustion amount (thermal power) of a burner.

  Conventionally, thermal efficiency has been raised as an index for evaluating the function of a gas stove. If a greater amount of heat can be transferred to the cooking container with a predetermined gas supply amount, the thermal efficiency will be improved. Therefore, in the JIS standard, the thermal efficiency of a cooking container having a predetermined size is measured with respect to the maximum gas supply amount of the gas stove. However, this thermal efficiency varies depending on the size of the cooking container used and the amount of combustion. FIG. 5 is a graph showing the thermal efficiency of a cooking container (small pot) having a diameter of 22 cm and a cooking container (large pot) having a diameter of 28 cm with respect to the combustion amount. The dotted line graph in FIG. 5 is a thermal efficiency graph of a small pan, and the solid line graph is a thermal efficiency graph of a large pan. As can be seen from this graph, the small hot pot is the thermal power control point where high thermal efficiency is obtained. In general, many cooking containers often used at home have a diameter of about 18 to 22 cm, and when using such a small pot, it is preferable in terms of thermal efficiency to cook at a medium heat or lower.

Therefore, the diameter of the cooking container to be used is displayed along with the thermal power adjustment lever that adjusts the burner combustion amount (thermal power) (recommended pan diameter display), and the thermal power that is most suitable for the diameter of the cooking container to be used is obtained. A gas stove displaying the adjustment position is proposed (Patent Document 1). In addition, it has a pan diameter detection sensor that detects the diameter of the cooking container, and when it is detected that the diameter of the cooking container is equal to or less than a predetermined dimension, by lowering the maximum value of the adjustment range of the heating power adjustment lever by a stopper, A gas stove that lowers the maximum heating power has also been proposed (Patent Document 2).
JP 2003-130358 A JP-A-9-53827

  However, with the gas stove of Patent Document 1, it is necessary to check the diameter of the cooking container each time it is used, and to adjust the heating power by visually checking the “recommended pan diameter display”, which is troublesome for the user. There was a point. In addition, for a user who always uses a cooking container having a diameter of 18 to 22 cm, which is frequently used in general households, it is necessary to squeeze the heating power after ignition, which is not convenient.

  Further, in the gas stove of Patent Document 2, since the maximum value of the adjustment range of the thermal power adjustment lever is automatically lowered, even when it is desired to use the maximum thermal power, the thermal power adjustment lever is mechanically set to the maximum thermal power. Since it could not be moved to the position, there was a problem that the maximum thermal power could not be used. For example, even if the thermal efficiency is poor, if the cooking container is overheated with a larger heating power, the amount of heat increases and heat is transferred quickly. That is, if hot water is boiled with the maximum thermal power, the amount of gas used is increased and the thermal efficiency is low, but hot water is boiled in a short time. In addition, the gas stove disclosed in Patent Document 2 must be provided with a mechanism such as a pan diameter detection sensor, which increases the manufacturing process and cost.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a gas stove that adjusts the combustion amount at a better combustion rate without bothering the user.

  In order to solve the above-described problem, in the gas stove according to the first aspect of the present invention, in the gas stove provided with a burner for heating the cooking vessel and a combustion amount adjusting means for adjusting the combustion amount of the burner, the combustion An energy saving mode for limiting the maximum combustion amount adjustable by the amount adjustment means to a combustion amount smaller than the maximum combustion amount that can be output in the gas stove, and the maximum combustion amount adjustable by the combustion amount adjustment means Is provided with a normal mode in which the maximum amount of combustion that can be output in the gas stove is provided, and further includes mode selection operation means for a user to select and operate either the energy saving mode or the normal mode. It becomes the composition which becomes.

  In the gas stove of the invention according to claim 2, in addition to the configuration of the invention of claim 1, an energy saving mode is selected when the burner is ignited, and thereafter the mode can be changed by the mode selection operation means. It is the structure characterized by becoming.

  Further, in the gas stove of the invention according to claim 3, in addition to the configuration of the invention of claim 1, a mode at the time of immediately preceding fire extinguishing is selected at the time of ignition of the burner, and then the mode is selected by the mode selection operation means. The configuration is characterized in that it can be changed.

  In the gas stove according to the first aspect of the present invention, the mode selection operation means allows the user to select and operate either the energy saving mode or the normal mode. The energy saving mode is a mode that limits the maximum combustion amount that can be adjusted by the combustion amount adjusting means to a combustion amount that is smaller than the maximum combustion amount that can be output in the gas stove, and the normal mode is that by the combustion amount adjusting means. In this mode, the maximum combustion amount that can be adjusted is set to the maximum combustion amount that can be output from the gas stove. Therefore, when using a pan (small pan) of a size generally used at home (diameter of about 18-22 cm), the thermal power suitable for the pan size can be easily set by selecting the energy saving mode. High thermal efficiency can be obtained. And since it is mode selection operation which switches the maximum combustion amount, the troublesome operation of confirming and adjusting a thermal-power adjustment lever is unnecessary, and it is very convenient. In addition, when using a large pan (a pan larger in diameter than a small pan, for example, about 28 cm in diameter), by selecting the normal mode, a thermal power suitable for the pan size can be set and high thermal efficiency can be obtained. . Moreover, since the user can arbitrarily select the mode regardless of the pan size, it can be changed according to the type of cooking, and the cooking performance is improved. Moreover, even when using a small pan, heating can be completed in a short time by selecting the normal mode when heating is desired in a hurry. In addition, when safety is important, by selecting the energy saving mode, it is possible to suppress the spread of the fire to the outer periphery of the pan and to prevent the clothing from being ignited. As described above, the mode selection can be freely set by the user, so that improvement in thermal efficiency, improvement in usability, and improvement in safety can be combined in a form corresponding to the purpose of use. Therefore, it can be used in a reasonable manner according to the user's wishes.

  In the gas stove of the invention according to claim 2, in addition to the effect of the invention of claim 1, the energy saving mode is selected when the burner is ignited, and then the mode can be changed by the mode selection operation means. Therefore, the mode corresponding to the small-diameter cooking container that is normally used frequently is selected at the time of ignition, the mode selection operation frequency at the time of ignition is reduced, and the usability is further improved.

  In addition, in the gas stove of the invention according to claim 3, in addition to the effect of the invention of claim 1, the mode at the time of the previous fire extinguishing is selected at the time of ignition of the burner, and then the mode is changed by the mode selection operation means. Therefore, the mode frequently used by the user of the gas stove is selected at the time of ignition, the mode selection operation frequency at the time of ignition is reduced, and the usability is further improved.

  Hereinafter, a built-in stove 1 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the built-in stove 1, and FIG. 2 is a schematic diagram showing a fuel supply system of the built-in stove 1.

  First, the built-in stove 1 will be described. As shown in FIG. 1, the top surface of the substantially rectangular parallelepiped built-in stove 1 is provided with five virtues 40 on which cooking containers are placed and a pair of left and right burners 2a and 2b (hereinafter referred to as burner 2). Are provided with operation buttons 3a, 3b (hereinafter referred to as operation buttons 3) for burner ignition / extinguishing operation. Further, below each of the operation buttons 3a and 3b, fire power adjusting levers 7a and 7b (hereinafter referred to as the fire power adjusting lever 7) for adjusting the heat power by a slide rotation operation are provided. The burner 2a or 2b is ignited by pressing the operation button 3a or 3b, and extinguished by pressing again. In addition, a grill 4 for heating and cooking an object to be cooked such as a fish is disposed at a substantially center inside the built-in stove 1. An energy saving switch 5 is provided to the right of the operation button 3a of the built-in stove 1, and an energy saving lamp 6 is provided above the switch.

  Next, the fuel supply system of the built-in stove 1 according to the present embodiment will be described with reference to FIG. In the built-in stove 1, the gas burns in the burner 2, and the cooking container 90 placed on the virtues 40 is heated. The gas supply pipe 20 that supplies gas to the burner 2 is provided with a magnet safety valve 11, a main valve 12, a needle valve 13, and a switching valve 14. Further, the built-in stove 1 includes a controller 30 including a CPU 31, an EEPROM 32, a ROM 33, and a RAM 34. An I / O interface (not shown) is connected to the CPU 31, and the magnet safety valve 11 and the switching valve 14 are connected to the controller 30 via the I / O interface. Control is performed. Further, a thermocouple 35 and an electrode 36 are connected to the controller 30 via an I / O interface. The ROM 33 stores a program for controlling the controller 30 and various data.

  A sliding member (not shown) that slides when the operation button 3 is pressed or released is provided on the back of the operation button 3 (see FIG. 1). A push-push mechanism 10 that controls opening and closing of the magnet safety valve 11 and the main valve 12 is provided by locking or releasing the sliding member. Further, an ignition switch (not shown) that is turned ON / OFF in conjunction with the advance / retreat of the sliding member is provided behind the push-push mechanism 10.

In the push-push mechanism 10, when the pressure of the operation button 3 in the ignition operation is released, the main valve 12 is kept open, the magnet safety valve 11 is retracted to a position where the valve can be closed, and the sliding member is locked. Then, the gas flow path from the gas supply pipe 20 is opened. Further, by the ignition operation, the ignition switch is turned ON, an ON signal is input to the controller 30, an ignition voltage is added to the ignition electrode 36, and the burner 2 burns. And the magnet safety valve 11 is hold | maintained by the electromotive force from the thermocouple 35 which generate | occur | produces an electromotive force during combustion of the burner 2.
Further, when the pressing of the operation button 3 in the fire extinguishing operation is released, the locking of the sliding member is released, the main valve 12 is closed, and the burner 2 is extinguished. The magnet safety valve 11 is also closed because the electromotive force from the thermocouple 35 cannot be obtained.

  The needle valve 13 adjusts the opening of the gas flow path according to the operation of the heating power adjustment lever 7. When the thermal power adjustment lever 7 is set from the high thermal power side to the low thermal power side, the valve opening of the needle valve 13 is adjusted narrowly, the amount of gas discharged is reduced, the combustion amount is reduced, and the burner 2 The firepower is low. When the thermal power adjustment lever 7 is set from the low thermal power side to the high thermal power side, the valve opening degree of the needle valve 13 is widely adjusted, the amount of gas discharged increases, the combustion amount increases, and the burner 2 The firepower is low.

  Then, the switching valve 14 switches the path of the gas flow path according to the input from the energy saving switch 5. In the gas supply pipe 20, the tip of the switching valve 14 branches into a normal gas supply pipe 21 and an energy saving gas supply pipe 22. The gas flow path can be switched between the normal gas supply pipe 21 side and the energy saving gas supply pipe 22 side by the switching valve 14. The energy saving gas supply pipe 22 is provided with a throttle 22a at the end thereof, and when the gas flow path communicates with the gas supply pipe 20 by the switching valve 14, the maximum value of the gas flow rate is smaller than the maximum flow rate in the needle valve 13. Limited to Therefore, when the gas flow path becomes the energy-saving gas supply pipe 22 side by the switching valve 14, even if the heating power adjustment lever 7 is set to the maximum heating power, the maximum combustion amount of the built-in stove 1 cannot be obtained. , It becomes weaker firepower. In the present embodiment, the state where the gas flow path is on the energy saving gas supply pipe 22 side is referred to as “energy saving mode”, and the state where the gas flow path is on the normal gas supply pipe 21 side is referred to as “normal mode”. Further, the energy saving lamp 6 is lit in the “energy saving mode” and not lit in the “normal mode”. Therefore, the user can recognize which mode the user is using.

  The switching of the switching valve 14 is performed by the energy saving switch 5. The energy saving switch 5 is a well-known touch switch and detects only pressing of the switch. If pressing of the energy saving switch 5 is detected in the “normal mode”, the mode is switched to the “energy saving mode”, and the gas flow path becomes the energy saving gas supply pipe 22 side. Further, if pressing of the energy saving switch 5 is detected in the “energy saving mode”, the mode is switched to the “normal mode”, and the gas flow path becomes the normal gas supply pipe 21 side. In “Normal mode”, the thermal power adjustment lever 7 can be used to adjust the thermal power freely within the range from a minimum of 0.4 kW to a maximum of 4.5 kW. In “Energy saving mode”, the minimum thermal power is the same as “Normal mode”. Although it is 0.4 kW, even if the thermal power adjustment lever 7 is set to the maximum thermal power, the combustion amount is limited to 1.4 kW.

  Moreover, as shown in FIG. 5, the range of the combustion amount with the most thermal efficiency in a small pot having a diameter of 22 cm is about 0.8 to 1.4 kW, and the combustion rate greatly deteriorates as the combustion amount increases. On the other hand, the range of the most heat-efficient combustion amount in a large pan having a diameter of 28 cm is about 1.1 to 2.3 kw. That is, the use with a strong heating power in a small pot (in the example shown in FIG. 5, the amount of combustion of about 3 kw or more) is extremely inefficient in heat. Therefore, if you use a small pan that is often used in general households, if you set it to “energy saving mode”, even if you set the maximum thermal power with the thermal power control lever 7, the combustion amount will be 1.4 kW, and the high thermal power with poor thermal efficiency It is economical because it can be used with high thermal efficiency. Moreover, in a large pot, by setting to “normal mode”, it becomes possible to use in a normal heating power adjustment range. Moreover, in this case, the thermal efficiency does not decrease so much even if the heating power is high. In addition, when priority is given to shortening the cooking time over the thermal efficiency, cooking can be performed in a short cooking time by setting the “normal mode” even for a small pot.

  Here, two examples of the control of the switching valve 14 by the controller 30 in the built-in stove 1 will be described. In the first embodiment, the previous fire extinguishing mode is applied at the time of ignition. In the second embodiment, the “energy saving mode” is always applied at the time of ignition.

[Example 1]
First, Embodiment 1 will be described with reference to the flowchart of FIG. When an ON signal is obtained from the ignition switch by the ignition operation of the operation button 3, an ignition operation is performed and the processing of this flowchart is started.

  First, a code indicating the mode stored in the EEPROM 32 (referred to as “energy saving mode flag”) is read (S1). The energy saving mode flag is “ON” and “1” is stored when it is “energy saving mode”, and “OFF” is stored and “0” is stored when it is “normal mode”. When the energy saving mode flag is “ON” (S2: YES), the switching valve 14 is opened to the energy saving gas supply pipe 22 side in the “energy saving mode” (S3). Then, the energy saving lamp 6 is turned on (S4). Then, it is determined whether or not pressing of the energy saving switch 5 is detected (S5).

  This determination of pressing of the energy saving switch 5 is repeated. When the pressing of the energy saving switch 5 is detected (S5: YES), an instruction to switch from the “energy saving mode” to the “normal mode” is given. “0” is set to “OFF”, and “normal mode” is set (S6). Then, the switching valve 14 is switched to the normal gas supply pipe 21 side in the “normal mode” (S7), and the energy saving lamp 6 is turned off (S8). Then, it is determined whether or not pressing of the energy saving switch 5 is detected (S9).

  When the pressing of the energy saving switch 5 is not detected (S9: NO), the determination of the pressing of the energy saving switch 5 is repeatedly made (S9), and when the pressing of the energy saving switch 5 is detected (S9: YES), “normal mode” Since “1” is set in the energy saving mode flag, “ON” is set and “energy saving mode” is set (S10). Then, the process proceeds to S3, where the switching valve 14 is opened to the energy saving gas supply pipe 22 side in the “energy saving mode” (S3), and the energy saving lamp 6 is turned on (S4). And the judgment whether the pressing of the energy saving switch 5 was detected is repeatedly performed (S5). During this process, a flag indicating the type of mode is constantly updated and stored, and the mode used immediately before the next ignition is automatically selected.

  By repeating the above processing, the mode at the time of the previous fire extinguishing is set at the time of ignition, and each time the energy saving switch 5 is pressed, the “normal mode” and the “energy saving mode” are switched, and the switching valve 14 is switched. The combustion amount of the burner 2 is adjusted. Therefore, the user of the built-in stove 1 can use the built-in stove 1 in the previous mode without being aware of the mode setting, and thus can be used in a mode that is normally used. Therefore, once the mode corresponding to the cooking pan size is set, it is not necessary to set the mode unless the pan size is changed greatly thereafter, which is convenient. Moreover, there is no troublesome operation of adjusting the heating power every time considering the thermal efficiency. Generally, a small pan is used for home use and a large pan is used for business use, but an appropriate mode can be maintained in either case.

[Example 2]
Next, Embodiment 2 will be described with reference to the flowchart of FIG. Also in this process, when an ON signal is obtained from the ignition switch by the ignition operation of the operation button 3, an ignition operation is performed and the process of this flowchart is started.

  First, “1” is set in the energy saving mode flag to “ON”, and “energy saving mode” is set (S11). Then, the switching valve 14 is opened to the energy saving gas supply pipe 22 side in the “energy saving mode” (S12), and the energy saving lamp 6 is turned on (S13). Then, it is determined whether or not pressing of the energy saving switch 5 is detected (S14). When the pressing of the energy saving switch 5 is not detected (S14: NO), the determination of the pressing of the energy saving switch 5 is repeatedly made (S14). When the pressing of the energy saving switch 5 is detected (S14: YES), “energy saving mode” Since “0” is set in the energy saving mode flag, “OFF” is set, and “normal mode” is set (S15). Then, the switching valve 14 is switched to the normal gas supply pipe 21 side in the “normal mode” (S16), and the energy saving lamp 6 is turned off (S17). Then, it is determined whether or not pressing of the energy saving switch 5 is detected (S18).

  This determination of pressing of the energy saving switch 5 is repeated, and if the pressing of the energy saving switch 5 is detected (S18: YES), an instruction to switch from the “normal mode” to the “energy saving mode” is given, so the process proceeds to S11 to save energy. The mode flag is set to “1” to be “ON”, and “energy saving mode” is set (S11). Then, the switching valve 14 is opened to the energy saving gas supply pipe 22 side in the “energy saving mode” (S12), and the energy saving lamp 6 is turned on (S13). Then, it is repeatedly determined whether or not pressing of the energy saving switch 5 is detected (S14).

  By repeatedly performing the above processing, “energy saving mode” is always set at the time of ignition, and each time the energy saving switch 5 is pressed, “normal mode” and “energy saving mode” are switched, and the switching valve 14 is switched. The combustion amount of the burner 2 is adjusted. Therefore, since it is always in the “energy saving mode” at the time of ignition, it is particularly useful in ordinary households where the small pan is frequently used. In addition, if it is normally used in the “energy saving mode”, it can be used safely because the maximum thermal power is limited.

  Note that the gas stove of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. In this embodiment, the maximum thermal power of 4.5 kW in the normal mode is limited to 1.4 kW in the energy saving mode, but the limit value is not limited to such a value. As shown in the graph of FIG. 5, the thermal efficiency of the small pan is considerably reduced at about 1/2 of the maximum heating power in the normal mode, so the maximum heating power in the energy saving mode is the maximum in the normal mode. It is preferable to limit it to 1/2 or less of the thermal power. Further, by pressing one energy saving switch 5, both the two sets of burners 2a and 2b may be switched between the normal mode and the energy saving mode, or only one set of burners is switched. Also good.

  In the first embodiment, the energy saving mode flag is stored in the EEPROM 32. However, this may be another storage medium such as the RAM 34. In the second embodiment, the controller 30 may not include the EEPROM 32.

  The gas stove of the present invention is not limited to the built-in stove incorporated in the kitchen unit, but may be a table stove placed on a cooking table, and can be applied to various gas stoves.

It is a perspective view of built-in stove 1. It is a schematic diagram of the fuel supply system of built-in stove 1. 3 is a flowchart of control of a switching valve 14 according to the first embodiment. It is a flowchart of control of the switching valve 14 of Example 2. FIG. It is a graph showing the thermal efficiency of a small pan and a large pan with respect to the amount of combustion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Built-in stove 2 Burner 3 Operation button 5 Energy saving switch 6 Energy saving lamp 7 Thermal power control lever 10 Push push mechanism 11 Magnet safety valve 12 Main valve 13 Needle valve 14 Switching valve 20 Gas supply pipe 21 Normal gas supply pipe 22 Energy saving gas supply pipe 30 Controller 35 Thermocouple 36 Electrode 32 EEPROM

Claims (3)

A burner for heating the cooking vessel;
In a gas stove provided with a combustion amount adjusting means for adjusting the combustion amount of the burner,
An energy saving mode for limiting the maximum combustion amount adjustable by the combustion amount adjusting means to a combustion amount smaller than the maximum combustion amount that can be output in the gas stove;
A normal mode in which the maximum combustion amount adjustable by the combustion amount adjusting means is the maximum combustion amount that can be output in the gas stove;
A gas stove provided with mode selection operation means for allowing a user to select and operate either the energy saving mode or the normal mode.   The gas stove according to claim 1, wherein the energy saving mode is automatically selected when the burner is ignited, and thereafter the mode can be changed by the mode selection operation means.   2. The gas stove according to claim 1, wherein the mode at the time of the immediately preceding fire extinguishing is selected when the burner is ignited, and thereafter the mode can be changed by the mode selection operation means.

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