Gas stove

Abstract

To provide a gas range which can be controlled to a rice cooking gas quantity with a simple configuration.SOLUTION: A gas range is provided with a fuel adjustment valve 25 for changing and adjusting a fuel gas quantity supplied to a burner 1, and a mechanical interlocking mechanism for positioning the fuel adjustment valve 25 at an ignition gas quantity position when an ignition / extinction operating tool is operated to an ignition position. A main flow passage 29A having a single opening / closing valve 26 and a bypass flow passage 29B in which a fuel gas having a configured low flow rate flow are arranged in a fuel gas supply passage 28 of the burner 1 side by side. When a rice cooking mode is selected, a control unit, which controls the fuel gas quantity supplied to the burner 1 to a rice cooking gas quantity which is smaller than the ignition gas quantity with the fuel adjustment valve 25 maintained at the ignition gas quantity position, adjusts the gas quantity to a cooking quantity for cooking rice as one of rise cooking gas quantities, by repeatedly opening and closing the opening / closing valve 26 between an open state and a closed state.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a gas stove provided with a manual operation type fuel control valve for changing and adjusting the amount of fuel gas supplied to a burner, a mechanical interlocking mechanism that links the ignition and extinguishing operation tool and the fuel control valve so that when the manual operation type ignition and extinguishing operation tool is operated to the ignition position, the fuel control valve is positioned at the gas amount position for ignition, and a control unit that controls the amount of fuel gas supplied to the burner to a gas amount for cooking rice that is less than the gas amount for ignition while maintaining the fuel control valve at the gas amount position for ignition when the cooking rice mode is selected after the ignition operation tool is operated to the ignition position and the ignition process is executed.

Background Art

[0002] In such a gas stove, when the ignition and extinguishing operation tool is operated to the ignition position by a mechanical interlocking mechanism that links the ignition and extinguishing operation tool and the fuel control valve, the fuel control valve is positioned at the gas amount position for ignition, so the ignition process can be performed with the gas amount for ignition, and the burner can be ignited well.

[0003] Moreover, when the cooking rice mode is selected after the ignition process is executed, the control unit controls the amount of fuel gas supplied to the burner to a gas amount for cooking rice that is less than the gas amount for ignition while maintaining the fuel control valve at the gas amount position for ignition. Therefore, the amount of fuel gas supplied to the burner can be controlled to a gas amount for cooking rice that is less than the gas amount for ignition without the trouble of operating the fuel control valve, and the usability is excellent.

[0004] That is, in order to perform the cooking rice mode, it is necessary to adjust the amount of fuel gas supplied to the burner to a gas amount for cooking rice that is less than the gas amount for ignition. However, since the amount of fuel gas supplied to the burner is controlled to the gas amount for cooking rice without the trouble of operating the fuel control valve, the usability is good. Incidentally, as the gas amount for cooking rice, there is a gas amount for boiling used in the process of boiling rice, and in addition, there is a gas amount for small fire used in the water absorption process in which rice absorbs water.

[0005] As a conventional example of such a gas stove, a first gas flow path provided with a first electromagnetic valve, a second gas flow path provided with a second electromagnetic valve, and a third gas flow path for flowing fuel gas at a set low flow rate are arranged in parallel in the fuel gas supply path of the burner. When the ignition operation tool is operated to the ignition position for ignition processing, the first electromagnetic valve and the second electromagnetic valve are opened. When controlling the amount of fuel gas supplied to the burner in the rice cooking mode to be less than the ignition gas amount and to a rice cooking gas amount for cooking rice, there is a configuration in which the second electromagnetic valve is closed while the first electromagnetic valve is kept open (see, for example, Patent Document 1).

[0006] That is, in Patent Document 1, by closing the second electromagnetic valve while keeping the first electromagnetic valve open, it is configured to adjust to the boiling gas amount for boiling rice as one of the rice cooking gas amounts less than the ignition gas amount. Also, by closing the first electromagnetic valve and the second electromagnetic valve, it is configured to adjust to the low fire gas amount as one of the rice cooking gas amounts less than the ignition gas amount.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] In a conventional gas stove, a first gas flow path provided with a first electromagnetic valve and a second gas flow path provided with a second electromagnetic valve are provided. By closing the second electromagnetic valve while maintaining the first electromagnetic valve in an open state, the amount of gas for cooking rice, which is less than the amount of gas for ignition, is adjusted to the amount of gas for cooking rice to cook the rice. Therefore, due to the need to provide two electromagnetic valves, namely the first electromagnetic valve and the second electromagnetic valve, there is an inconvenience that the configuration for controlling the amount of fuel gas supplied to the burner to be less than the amount of gas for ignition becomes complicated, and improvement has been desired.

[0009] The present invention has been made in view of the above problems, and an object thereof is to provide a gas stove capable of controlling the amount of gas for cooking rice with a simple configuration.

Means for Solving the Problems

[0010] The gas stove of the present invention includes a manually operated fuel control valve for changing and adjusting the amount of fuel gas supplied to the burner, When the manually operated ignition and extinguishing operating tool is operated to the ignition position, a mechanical interlocking mechanism that interlocks the ignition and extinguishing operating tool and the fuel control valve to position the fuel control valve at the gas amount position for ignition, When the cooking rice mode is selected after the ignition operation tool is operated to the ignition position and the ignition process is executed, a control unit that controls the amount of fuel gas supplied to the burner while maintaining the fuel control valve at the gas amount position for ignition to be less than the gas amount for ignition and the gas amount for cooking rice for cooking rice. The characteristic configuration is as follows: In the fuel gas supply path of the burner, a main flow path having a single on-off valve and a bypass flow path that connects an upstream portion and a downstream portion of the main flow path and allows a fuel gas with a set low flow rate to flow are provided in parallel. The control unit repeatedly opens and closes the on-off valve between an open state and a closed state to adjust the amount of gas for cooking rice to the amount of gas for cooking rice to cook the rice as one of the amounts of gas for cooking rice.

[0011] That is, a main flow path having a single on-off valve and a bypass flow path that connects the upstream and downstream locations of the main flow path to allow a set low flow rate of fuel gas to flow are arranged in parallel in the fuel gas supply path of the burner. Then, by repeatedly opening and closing the on-off valve provided in the main flow path between the open state and the closed state, as one of the gas amounts for cooking rice, it will be adjusted to the gas amount for cooking the rice.

[0012] That is, by repeating the state of opening the on-off valve to allow a fuel gas amount corresponding to the ignition gas amount to flow and the state of closing the on-off valve to allow a set low flow rate of fuel gas amount that is sufficiently less than the ignition gas amount to flow, as one of the gas amounts for cooking rice, it will be adjusted to the gas amount for cooking the rice. Adding an explanation, the total amount of fuel gas obtained by adding the total amount of fuel gas that flows while the on-off valve is maintained in the open state and the total amount of fuel gas that flows while the on-off valve is maintained in the closed state, divided by the unit cycle time obtained by adding the time during which the on-off valve is maintained in the open state and the time during which the on-off valve is maintained in the closed state, becomes the gas amount for cooking per unit time.

[0013] In this way, by simply providing a single on-off valve that is repeatedly opened and closed, it can be adjusted to the gas amount for cooking the rice, which is one of the gas amounts for cooking rice. Therefore, the gas amount for cooking rice can be controlled with a simple configuration.

[0014] In short, according to the characteristic configuration of the gas stove of the present invention, the gas amount for cooking rice can be controlled with a simple configuration.

[0015] A further characteristic configuration of the gas stove of the present invention is that the control unit adjusts the gas amount for cooking in multiple stages by varying the opening and closing ratio at which the on-off valve is repeatedly opened and closed.

[0016] That is, by varying the opening and closing ratio for repeatedly opening and closing the on-off valve, the amount of gas for cooking is adjusted in multiple stages. Therefore, when cooking rice, the heating power for cooking can be increased or decreased, enabling good cooking.

[0017] In short, according to a further characteristic configuration of the gas stove of the present invention, good cooking can be achieved while adjusting the amount of gas for cooking in multiple stages.

[0018] A further characteristic configuration of the gas stove of the present invention lies in that the fuel control valve is provided in the main flow path.

[0019] That is, since the fuel control valve is provided in the main flow path, the amount of fuel gas flowing through the bypass flow path when the on-off valve in the main flow path is closed is not affected by the fuel control valve. Therefore, the fuel gas with a set low flow rate can be appropriately flowed through the bypass flow path.

[0020] In short, according to a further characteristic configuration of the gas stove of the present invention, the fuel gas with a set low flow rate can be appropriately flowed through the bypass flow path.

[0021] A further characteristic configuration of the gas stove of the present invention is that as the rice cooking mode, a water absorption step and a cooking step following the water absorption step are defined. The control unit closes the on-off valve in at least the latter half of the water absorption step, thereby adjusting to the gas amount for low heating power as one of the gas amounts for rice cooking, and in the cooking step, adjusting to the gas amount for cooking.

[0022] That is, when cooking rice, first, a water absorption step of heating with a small heating power while the rice absorbs water is performed, and following the water absorption step, a cooking step of cooking the rice while heating with a stronger heating power is desirably performed. Incidentally, in the first half of the water absorption process, in order to rapidly increase the temperature, heating may be performed with a stronger heat source than in the second half of the water absorption process. However, in at least the second half of the water absorption process, it is desirable to heat with a small heat source in order to perform good water absorption of the rice.

[0023] In view of this point, in at least the second half of the water absorption process, by closing the on-off valve, as one of the gas amounts for cooking rice, it is adjusted to the gas amount for a small heat source, and in the cooking process, it is adjusted to the gas amount for cooking. Therefore, the water absorption process can be appropriately performed while heating with a small heat source, and moreover, the cooking process can be appropriately performed while heating with a stronger heat source.

[0024] In short, according to a further characteristic configuration of the gas stove of the present invention, the water absorption process and the cooking process can be appropriately performed.

[0025] A further characteristic configuration of the gas stove of the present invention is that the cooking process consists of a front-side cooking process and a rear-side cooking process. The control unit makes the gas amount for cooking in the front-side cooking process larger than the gas amount for cooking in the rear-side cooking process by varying the opening and closing ratio for repeatedly opening and closing the on-off valve.

[0026] That is, in the front-side cooking process in the cooking process of cooking rice, since there is sufficient moisture, it is desirable to heat with a stronger heat source than in the rear-side cooking process and cook while maintaining a boiling state. In the rear-side cooking process where the moisture decreases, it is desirable to heat with a weaker heat source than in the front-side cooking process and suppress the coloring of the rice present in the bottom part of the pot while maintaining a boiling state.

[0027] In view of this point, by varying the opening and closing ratio of repeatedly opening and closing the on-off valve, the amount of cooking gas in the front cooking process is made more than the amount of cooking gas in the rear cooking process. In other words, the amount of cooking gas in the rear cooking process is made less than the amount of cooking gas in the front cooking process. Therefore, in the front cooking process where sufficient moisture exists, it is possible to cook well while appropriately maintaining the boiling state. Moreover, in the rear cooking process where the moisture decreases, it is possible to cook well while suppressing the coloring of the rice existing in the bottom part of the pot while maintaining the boiling state.

[0028] Incidentally, in the front cooking process and the rear cooking process, since the amount of cooking gas is made less than the amount of ignition gas, it is possible to prevent spilling as much as possible while appropriately maintaining the boiling state.

[0029] In short, according to a further characteristic configuration of the gas stove of the present invention, good cooking can be achieved in each of the front cooking process and the rear cooking process in the cooking process.

[0030] A further characteristic configuration of the gas stove of the present invention is provided with a temperature detection unit that detects the temperature of the rice cooker heated by the burner. In the first half of the water absorption process, the control unit opens the on-off valve and determines the front process time for performing the front cooking process based on the temperature increase gradient of the detected temperature detected by the temperature detection unit in the first half.

[0031] That is, in the first half of the water absorption process, the on-off valve is opened and the burner burns at a firepower corresponding to the amount of ignition gas. The temperature increase gradient of the detected temperature detected by the temperature detection unit tends to rise rapidly as the amount of cooked rice decreases. That is, the amount of cooked rice can be detected by the temperature increase gradient of the detected temperature detected by the temperature detection unit.

[0032] And, based on the temperature increase gradient of the detected temperature detected by the temperature detection unit, the front-side process time for performing the front-side cooking-up process is determined. Therefore, by setting the front-side process time for performing the front-side cooking-up process to be longer as the rice cooking amount is larger, good cooking-up can be performed regardless of the amount of rice cooking.

[0033] In short, according to the further characteristic configuration of the gas stove of the present invention, good cooking-up can be performed regardless of the amount of rice cooking.

[0034] A further characteristic configuration of the gas stove of the present invention is provided with a temperature detection unit for detecting the temperature of the rice cooking cooker heated by the burner. In the first half of the water absorption process, the control unit opens the on-off valve, and based on the temperature increase gradient of the detected temperature detected by the temperature detection unit in the first half, determines the water absorption process time for performing the second half of the water absorption process.

[0035] That is, in the first half of the water absorption process, the on-off valve is opened and the burner burns at a heating power corresponding to the ignition gas amount, and the temperature increase gradient of the detected temperature detected by the temperature detection unit tends to rise more rapidly as the rice cooking amount is smaller. That is, the rice cooking amount can be detected by the temperature increase gradient of the detected temperature detected by the temperature detection unit.

[0036] And, based on the temperature increase gradient of the detected temperature detected by the temperature detection unit, the water absorption process time for performing the second half of the water absorption process is determined. Therefore, by setting the water absorption process time for performing the second half of the water absorption process to be longer as the rice cooking amount is larger, good water absorption can be performed regardless of the amount of rice cooking.

[0037] In short, according to the further characteristic configuration of the gas stove of the present invention, good water absorption can be performed regardless of the amount of rice cooking.

Brief Description of the Drawings

[0038]

Figure 1

Figure 2

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Figure 19

Embodiments for Carrying Out the Invention

[0039] 〔Embodiment〕 Hereinafter, embodiments of the present invention will be described based on the drawings.

[0040] (Overall Structure of the Gas Stove) As shown in FIG. 1, the exemplary gas stove is configured in a form that includes a stove section having a left stove burner 1A and a right stove burner 1B as a burner example (stove burner 1), and a grill section G, and is configured as a built-in type to be incorporated into a kitchen counter.

[0041] The upper surface of the gas stove is covered with a glass top plate 3, and a grill exhaust port 4 for exhausting the combustion exhaust gas of the grill section G is formed on the rear side of the upper surface of the gas stove. A trivet 5 for placing an object to be heated such as a pot heated by each of the two left stove burners 1A and right stove burners 1B is provided above the top plate 3.

[0042] As shown in FIG. 2, the stove burner 1 (left stove burner 1A and right stove burner 1B) is equipped with an ignition plug P for ignition and a flame detection sensor R for detecting the ignition state configured using a thermocouple or the like. Also, as shown in FIGS. 1 and 2, the stove burner 1 (left stove burner 1A and right stove burner 1B) is equipped with a temperature detection sensor S (an example of a temperature detection section) that contacts the bottom of an object to be heated such as a pot and detects its temperature. Incidentally, in FIG. 2, a pot M for cooking rice (an example of a rice cooker) is illustrated as the object to be heated.

[0043] (Operation Structure of the Gas Stove) As shown in FIG. 1, on the front surface of the gas stove, cylindrical left stove operation tools 6A and right stove operation tools 6B for performing ignition and extinguishing operations and fire power adjustment operations for each of the left stove burner 1A and right stove burner 1B are provided dispersedly on both the left and right sides, and a cylindrical grill operation tool 7 for performing ignition and extinguishing operations and fire power adjustment operations for a grill burner (not shown) of the grill section G is provided beside the right stove operation tool 6B. In addition, a stove setting operation section 10 and a grill setting operation section 11 for inputting various information such as cooking information are provided dispersedly on both the left and right sides.

[0044] The cooking appliance setting operation unit 10 is configured to be able to select rice cooking (an example of the rice cooking mode) as one of the automatic cooking menus executed by the cooking appliance burner 1. And an operation control unit Q (an example of a control unit, see FIG. 3) that controls the operation of the gas cooking appliance is configured to control the combustion of the cooking appliance burner 1 based on a command from the cooking appliance setting operation unit 10 to execute rice cooking, and the details will be described later. Incidentally, since the pair of left cooking appliance operation tools 6A and right cooking appliance operation tools 6B are similarly configured and operated in the same manner, hereinafter, the left cooking appliance operation tool 6A and the right cooking appliance operation tool 6B will be referred to as the cooking appliance operation tool 6 (an example of a manually operated spot extinguishing operation tool) for description.

[0045] As shown in FIGS. 8 and 9, the cooking appliance operation tool 6 is configured to be switchable to a fire extinguishing position A, an ignition position B, a combustion position C, and a fire extinguishing operation position D by being pushed and moved in the front-rear direction of the cooking appliance, and is configured to be rotatable around an operation axis X along the push-movement operation direction (the front-rear direction of the cooking appliance).

[0046] That is, the cooking appliance operation tool 6 moves to the ignition position B by a push-movement operation from the fire extinguishing position A, and moves to the combustion position C on the side away from the ignition position B beyond the fire extinguishing position A by releasing the push-movement operation at the ignition position B by an urging force, and is configured to be able to return to the fire extinguishing position A by a push-movement operation from the combustion position C. Note that the above-described movement form of the cooking appliance operation tool 6 is performed using a push-push mechanism described later.

[0047] Incidentally, when operating the cooking appliance operation tool 6 from the combustion position C to the fire extinguishing position A, the cooking appliance operation tool 6 is pushed and moved to the fire extinguishing operation position D beyond the fire extinguishing position A from the combustion position C, and by releasing the push-movement operation at the fire extinguishing operation position D, the cooking appliance operation tool 6 is configured to move to the fire extinguishing position A by an urging force. Note that FIG. 8 shows a state where the cooking appliance operation tool 6 is located at the fire extinguishing position A, and FIG. 9 shows a state where the cooking appliance operation tool 6 is located at the combustion position C.

[0048] Further, the cylindrical peripheral wall portion Ha that is gripped when the cooking appliance operation tool 6 is rotationally operated is configured to be rotatable around the operation axis X, while the end face portion Hb that is pressed when the cooking appliance operation tool 6 is pushed and moved is configured to be maintained in a non-rotating state when being pushed and moved, and the details thereof will be described later.

[0049] (Fuel supply configuration) As shown in FIG. 2, a pair of cooking appliance branch paths 16A and 16B for the left cooking burner 1A and the right cooking burner 1B, and a grill branch path 17 for a grill burner (not shown) are connected to a raw gas supply path 15 to which gas fuel such as city gas is supplied. A cooking appliance faucet 19 is disposed in each of the pair of cooking appliance branch paths 16A and 16B.

[0050] The cooking appliance faucet 19 is equipped with a main valve 23 that is opened and closed by the push-and-move operation of the cooking appliance operation tool 6, an electromagnetic operation type safety valve 24 that is elastically biased in a closed state, a needle type fuel adjustment valve 25 (an example of a manually operated fuel adjustment valve) that is operated by the rotational operation of the cooking appliance operation tool 6, and a cooking appliance side electromagnetic valve 26 for flame intensity adjustment (an example of a single on-off valve) that switches the flame intensity between a strong state and a weak state.

[0051] When the cooking appliance operation tool 6 is operated to the ignition position, the fuel adjustment valve 25 is linked to the cooking appliance operation tool 6 by a mechanical interlocking mechanism N so as to be positioned at the ignition gas amount position, as will be described later. That is, when the cooking appliance operation tool 6 is operated to the ignition position, an ignition process for operating the ignition plug P is executed. At this time, the fuel adjustment valve 25 is positioned at the ignition gas amount position so that an ignition gas amount suitable for ignition is supplied to the cooking burner 1. In addition, in the present embodiment, when the mechanical interlocking mechanism N pushes and moves the cooking appliance operation tool 6 to the fire extinguishing operation position D, the fuel adjustment valve 25 is linked so as to be positioned at the ignition gas amount position, so that when the cooking appliance operation tool 6 is operated to the ignition position, the fuel adjustment valve 25 is configured to be positioned at the ignition gas amount position.

[0052] Then, in the main flow path 28 (an example of a fuel gas supply path) including the main valve 23 and the safety valve 24, there are provided in parallel a main flow path 29A including a fuel control valve 25 and a stove-side solenoid valve 26, and a branch flow path 29B (an example of a bypass flow path) that connects an upstream portion and a downstream portion of the main flow path 29A and includes a low-fire orifice 27 to allow a set low flow rate of fuel gas to flow. Therefore, when the stove-side solenoid valve 26 is open, the gas fuel flows through the main flow path 29A and the branch flow path 29B, and when the stove-side solenoid valve 26 is closed, the gas fuel is configured to flow through the branch flow path 29B.

[0053] The stove-side solenoid valve 26 is opened and closed by the operation control unit Q in order to switch the heating power between a strong state and a weak state when performing rice cooking (rice cooking mode) set by the rice cooker setting operation unit 10. That is, after the ignition process is executed when the rice cooker operating tool 6 is operated to the ignition position, when the rice cooking (rice cooking mode) is selected, the operation control unit Q is configured to control the amount of fuel gas supplied to the rice cooker burner 1 to be less than the ignition gas amount to the rice cooking gas amount while maintaining the fuel control valve 25 at the ignition gas amount position.

[0054] Specifically, the operation control unit Q is configured to adjust to the boiling gas amount for boiling the rice as one of the rice cooking gas amounts by repeatedly opening and closing the stove-side solenoid valve 26 between an open state and a closed state. To add an explanation, the total amount of fuel gas obtained by adding the total amount of fuel gas flowing while the stove-side solenoid valve 26 is maintained in the open state and the total amount of fuel gas flowing while the stove-side solenoid valve 26 is maintained in the closed state, divided by the unit cycle time obtained by adding the time during which the stove-side solenoid valve 26 is maintained in the open state and the time during which the stove-side solenoid valve 26 is maintained in the closed state, is the boiling gas amount per unit time.

[0055] In this embodiment, the operation control unit Q is configured to adjust the amount of cooking gas in multiple stages (two stages in this embodiment) by varying the opening and closing ratio at which the stove-side solenoid valve 26 is repeatedly opened and closed. Furthermore, the operation control unit Q is configured to adjust the amount of gas for low heat by closing the stove-side solenoid valve 26, which is one of the amounts of gas for rice cooking. Details of the rice cooking (rice cooking mode) will be described later.

[0056] (Details of the appliance tap for the stove) As shown in FIGS. 8 and 9, the main body casing 36 of the appliance tap 19 for the stove is configured by connecting a front-side casing 36F made of synthetic resin and a rear-side casing 36R made of metal in a side-by-side arrangement in the front-rear direction, and connecting an upper-side casing 36U made of metal to the upper part of the rear-side casing 36R.

[0057] As shown in FIG. 9, a valve storage space extending along the front-rear direction of the stove is formed in the rear-side casing 36R, and a main valve 23 and an electromagnetic operation type safety valve 24 are installed inside the valve storage space, and details thereof will be described later. The upper-side casing 36U has a portion that extends in a cantilever shape toward an upper position of the front-side casing 36F, and a fuel control valve 25 for the stove burner 1 is provided in the extending portion, and a stove-side solenoid valve 26 for flame adjustment is installed at the rear of the upper-side casing 36U.

[0058] A slider storage space extending along the front-rear direction of the stove is formed in the front-side casing 36F, and a slider 40 that moves integrally with the stove operating tool 6 and a relay slider 41 that is pressed and moved by the slider 40 are housed movably along the axial direction of the operation axis X while being prevented from rotating around the operation axis X.

[0059] At the lower part of the rear casing 36R in the main body casing 36, an inlet 38 to which the branch paths 16A and 16B for the stove, branched from the raw gas supply path 15, are connected is formed. At the upper part of the upper casing 36U, an outlet 39 for supplying gas fuel toward the stove burner 1 is formed. And inside the rear casing 36R and the upper casing 36U in the main body casing 36, the main flow path 28, the main flow path 29A, and the branch flow path 29B are formed in a state of communicating the inlet 38 and the outlet 39.

[0060] FIG. 10 shows a state in which the main valve 23, the electromagnetic operation type safety valve 24, and the stove side electromagnetic valve 26 are in an open state, and the gas fuel introduced into the inlet 38 flows to the outlet 39, and the flow of the gas fuel is indicated by an arrow line. Since the respective configurations of the main flow path 28, the main flow path 29A, and the branch flow path 29B can be understood by the flow of the gas fuel, detailed descriptions of the main flow path 28, the main flow path 29A, and the branch flow path 29B are omitted.

[0061] As shown in FIGS. 9 and 10, a metal valve rod 42 is housed in the rear casing 36R so as to be reciprocally movable along the pushing and moving operation direction (stove front-rear direction) of the stove operating tool 6, and a valve body 23A for the main valve constituting the main valve 23 is mounted on this valve rod 42 so as to move integrally. Further, a first spring 43 for urging the main valve body 23A toward the front side of the stove is provided, and the main valve body 23A is configured to move to a closed position where it contacts the main valve seat 23B by moving toward the front side of the stove by the urging force of the first spring 43.

[0062] As shown in FIGS. 9 and 10, a safety valve body 24A constituting the safety valve 24 is configured to move toward the front side of the stove by a second spring 44 and move to a closed position where it contacts the safety valve seat 24B. Further, when the valve rod 42 moves inward (rearward of the crosshead) in the crosshead against the biasing force of the first spring 43, the valve body 24A for the safety valve of the safety valve 24 is configured to be pressed to the open position. And the exciting portion 24C of the safety valve 24 is configured to hold the valve body 24A for the safety valve, which has been pressed to the open position, in the open position by electromagnetic force.

[0063] As shown in FIGS. 9 and 10, the fuel control valve 25 is provided in the upper casing 36U. That is, in the upper casing 36U, the valve body 25A as the valve body for fuel control of the fuel control valve 25 is housed so as to be reciprocally movable along the pushing and moving operation direction (the crosshead front-rear direction) of the crosshead operating tool 6.

[0064] As shown in FIGS. 9 and 10, a slit 45 (an example of an insertion hole) along the pushing and moving operation direction of the crosshead operating tool 6 is formed in the lower wall portion of the cylindrical portion 36W that houses the valve body 25A in the upper casing 36U, and a linking pin 46 (an example of a locked body) attached to the valve body 25A is provided in a state of protruding downward through the slit 45. By performing a locking and moving operation on this linking pin 46, the fuel control valve 25 is adjusted, and the details will be described later.

[0065] As shown in FIGS. 9 and 10, a crosshead-side solenoid valve 26 is attached to the inner end of the upper casing 36U on the crosshead side. This crosshead-side solenoid valve 26 closes the main flow path 29A by bringing the opening and closing valve body 26A, which is biased to return to the closed position, into contact with the valve seat 26B for the solenoid valve, and opens the main flow path 29A by separating the opening and closing valve body 26A from the valve seat 26B for the solenoid valve.

[0066] As shown in FIG. 9, an annular intermediate wall portion 36m through which a protruding push portion 40A protruding rearward of the connecting rod from the central portion of the slider 40 can be inserted is formed at an intermediate portion in the front-rear direction of the connecting rod in the slider accommodation space formed inside the front casing 36F. Further, below the intermediate wall portion 36m, a flat positioning plate portion 40B protruding rearward of the connecting rod from the lower end portion of the slider 40 is movably inserted in the front-rear direction of the connecting rod. The slider 40 is configured such that rotation about the operation axis X is prevented when the positioning plate portion 40B contacts the lower portion of the intermediate wall portion 36m or the like.

[0067] A third spring 47 that biases the slider 40 forward of the connecting rod is provided between the intermediate wall portion 36m and the slider 40, and a receiving portion 36n that receives and restricts the forward movement range of the slider 40 with respect to the connecting rod is provided at the front end portion of the front casing 36F. A fourth spring 48 that biases the relay slider 41 forward of the connecting rod is provided, and the forward movement range of the relay slider 41 biased by the fourth spring 48 is configured to be received and restricted by the intermediate wall portion 36m.

[0068] Although not shown, a contact plate block Y (see FIG. 3) having fixed contacts for ignition, fixed contacts for safety, etc. is attached to the left side portion of the front casing 36F, and as the slider 40 slides, the movable contacts attached to the slider 40 are switched between a contact state and a non-contact state with respect to each fixed contact. As shown in FIG. 3, the detection information of the contact plate block Y is input to the operation control unit Q, and the operation control unit Q is configured to control the ignition operation of the spark plug P and the opening and closing operation of the safety valve 24 based on the detection information of the contact plate block Y. The details will be described later.

[0069] (Push-Push Mechanism) As shown in FIGS. 9 and 10, a U-shaped locking pin 49 is provided on the lower surface of the front-side casing 36F, and the rear end portion is swingably supported in the left-right direction at a fulcrum forming portion 36P provided at the rear portion of the front-side casing 36F, so that it is swingable in the left-right direction and is biased upward by an annular spring 50.

[0070] On the lower surface of the positioning plate portion 40B of the slider 40, a positioning engaging groove is formed for engaging the tip (front end portion) of the locking pin 49 that penetrates the bottom wall portion of the front-side casing 36F. A so-called push-push mechanism for positioning the connecting rod operating tool 6 is configured by the locking pin 49 and the engaging groove. Since this push-push mechanism is well-known, a detailed description thereof will be omitted. Note that the locking pin 49 has a function of locking the relay slider 41 as will be described later.

[0071] (Details of operation by the connecting rod appliance plug) Next, the operation of the connecting rod appliance plug 19 and the control operation of the operation and control unit Q based on the operation of the connecting rod operating tool 6 will be collectively described. That is, as shown in FIG. 12, when the connecting rod operating tool 6 is in the fire extinguishing position A, the main valve body 23A of the main valve 23 closes the main flow path 28, and the safety valve 24 is also elastically closed so that the safety valve body 24A closes the main flow path 28. Although not shown, when the connecting rod operating tool 6 is in the fire extinguishing position A, the movable contact of the slider 40 is in a non-contact state with the ignition fixed contact and the safety fixed contact of the contact plate block Y.

[0072] As shown in FIG. 13, when the connecting rod operating tool 6 is pushed and moved from the fire extinguishing position A to the ignition position B, the slider 40 pushes and moves the relay slider 41, and the relay slider 41 pushes and moves the valve rod 42, so that the main valve body 23A of the main valve 23 opens the main flow path 28, and the tip of the valve rod 42 presses the safety valve body 24A of the safety valve 24 to open the valve.

[0073] Although illustration is omitted, when the cooker operating tool 6 is pushed and moved to the ignition position B, the movable contact of the slider 40 is switched to a contact state in which it contacts the ignition fixed contact of the contact plate block Y. As a result, the operation control unit Q executes an ignition process of operating the spark plug P until ignition is detected by the ignition sensor R. In addition, when ignition is detected by the ignition sensor R, the safety valve 24 is energized to keep it open.

[0074] As shown in FIG. 14, after the cooker burner 1 is ignited, when the pushing and moving operation of the cooker operating tool 6 is released, the cooker operating tool 6 moves to the combustion position C by an urging force, and the slider 40 moves to the front side of the cooker together with the cooker operating tool 6. However, the relay slider 41 is maintained in a state of pushing and moving the valve rod 42 by the locking of the locking pin 49, and the main valve body 23A of the main valve 23 maintains the state of opening the main flow path 28.

[0075] Although illustration is omitted, when the cooker operating tool 6 moves to the combustion position C, the movable contact of the slider 40 is switched to a non-contact state in which it does not contact the ignition fixed contact of the contact plate block Y, and is switched to a contact state in which it contacts the safety fixed contact. Since the operation control unit Q has the safety fixed contact switched to the contact state, when ignition is detected by the ignition sensor R, the safety valve 24 is operated to the open state, and when ignition is not detected by the ignition sensor R, an emergency stop process of operating the safety valve 24 to the closed state is executed.

[0076] As shown in FIG. 15, when the cooker operating tool 6 is pushed from the combustion position C to the fire extinguishing operation position D, the locking of the relay slider 41 by the locking pin 49 is released, and the slider 40 moves to the front side of the cooker, so that the valve rod 42 moves to the front side of the cooker, and the main valve body 23A of the main valve 23 closes the main flow path 28. Although illustration is omitted, when the cooker operating tool 6 moves to the fire extinguishing operation position D, the movable contact of the slider 40 becomes a non-contact state with the ignition fixed contact and the safety fixed contact of the contact plate block Y. Therefore, the operation control unit Q executes a fire extinguishing process of operating the safety valve 24 to the closed state.

[0077] (Details of the cooker operating tool) As shown in FIGS. 9 and 11, a cylindrical main body portion 52 forming the peripheral wall portion Ha of the cooker operating tool 6 is provided, and a main body cap 53 forming the end face portion Hb of the cooker operating tool 6 is provided at the front end portion of the main body portion 52. The main body cap 53 is provided with a plurality of leg portions 53a having a leg shape extending toward the rear side of the cooker and a locking protrusion protruding radially outward at the tip end portion. On the other hand, an annular protrusion 52a is formed on the inner surface of the main body portion 52.

[0078] The leg portions 53a of the main body cap 53 are fitted inside the protrusion 52a of the main body portion 52, and the main body cap 53 is attached to the main body portion 52 in a state where the locking protrusion at the tip end of the leg portion 53a locks the protrusion 52a. That is, the main body cap 53 is rotatably attached to the main body portion 52 around the operation axis X.

[0079] A cylindrical spacer 54 fitted and attached to the tip end of the slider 40 is provided, and the leg portions 53a of the main body cap 53 are externally fitted to the cylindrical spacer 54, and the back surface (the surface on the rear side of the cooker) of the main body cap 53 is configured to contact the tip end of the cylindrical spacer 54. Therefore, when the main body cap 53 is pushed and moved toward the rear side of the cooker, the cylindrical spacer 54 contacting the back surface of the main body cap 53 is pushed and moved toward the rear side of the cooker, so that the slider 40 is configured to be pushed and moved toward the rear side of the cooker.

[0080] And, since the back surface of the main body cap 53 (the surface on the rear side of the stove) abuts against the tip of the cylindrical spacer 54 as described above, the main body cap 53 can rotate around the operation axis X with respect to the cylindrical spacer 54 and the slider 40. That is, the main body cap 53 is rotatably mounted around the operation axis X with respect to each of the main body portion 52 and the cylindrical spacer 54 (slider 40).

[0081] The cylindrical main body 55A of the rotating body 55 for firepower adjustment is externally fitted at the connection portion between the cylindrical spacer 54 and the slider 40 so as to be rotatable around the operation axis X and restricted from moving in the front-rear direction of the stove. The main body portion 52 of the stove operation tool 6 is externally fitted to the cylindrical main body 55A of the rotating body 55 so as to be integrally rotatable and restricted from moving in the front-rear direction of the stove. That is, in the present embodiment, the peripheral wall portion Ha of the stove operation tool 6 is configured in a form including the rotating body 55. And, an operation piece 55B for firepower adjustment extends rearward of the stove along the axial direction of the operation axis X on the cylindrical main body 55A of the rotating body 55, and is configured to operate a fuel adjustment valve 25 as described later.

[0082] As described above, in the present embodiment, a slide-type operation tool support J that supports the stove operation tool 6 so as to be switchable between the ignition position B, the combustion position C, and the extinguishing position A is configured from the slider 40 and the cylindrical spacer 54. This operation tool support J is housed in the front-side casing (support casing) 36F so as to be movable along the axial direction of the operation axis X while being prevented from rotating around the operation axis X.

[0083] And, the peripheral wall portion Ha of the stove operation tool 6 is configured to be rotatable around the operation axis X with respect to each of the end face portion Hb and the operation tool support J, and the end face portion Hb is configured to be rotatable around the operation axis X with respect to the operation tool support J.

[0084] (Operation configuration of fuel adjustment valve) As shown in FIGS. 8 and 11, a rotary body 56 for valve operation for regulating the firepower is mounted on the semi-cylindrical outer peripheral portion at the upper part of the front side casing 36F so as to be restricted in movement in the pushing and moving operation direction of the stirrer operating tool 6 and rotatable around the operation axis X. The rotary body 56 for valve operation includes an arc-shaped portion 56B as a main part, and is configured in a form including a rod-shaped operated piece 56A extending from the arc-shaped portion 56B toward the side where the stirrer operating tool 6 is located along the axial direction of the operation axis X.

[0085] On the upper surface of the front side casing 36F, a pair of positioning grooves E arranged in the front-rear direction of the stirrer are formed in a form centered on the operation axis X as positioning concave grooves, and a pair of engaging protrusions 56a engaging with the positioning grooves E are formed on the lower surface of the rotary body 56 for valve operation (see FIG. 9). And, by fitting the engaging protrusion 56a into the positioning groove E, it is configured to restrict the movement of the rotary body 56 for valve operation in the pushing and moving operation direction (front-rear direction of the stirrer) of the stirrer operating tool 6.

[0086] The operation piece 55B of the rotary body 55 is formed in an inverted U-shaped cross-sectional shape so as to extend toward the side where the rotary body 56 for valve operation is located along the axial direction of the operation axis X, and the operated piece 56A of the rotary body 56 for valve operation is inserted into the operation piece 55B so as to be movable in the front-rear direction of the stirrer and integrally rotatable around the operation axis X. That is, a connecting portion Z is formed which integrally rotatably connects the peripheral wall portion Ha of the stirrer operating tool 6 and the rotary body 56 for valve operation in a state allowing relative movement in the axial direction of the operation axis X between the operation piece 55B and the operated piece 56A, and the operation piece 55B and the operated piece 56A are engaged in a state allowing relative movement in the axial direction of the operation axis X and integrally rotatable around the operation axis X.

[0087] As shown in FIGS. 8 to 11, on the upper surface portion of the front-side casing 36F, there is provided a receiving and supporting portion 36r that receives and supports, from the upper side (outer side), a pressed portion 56b provided at the rear end portion on the side away from the connecting rod operating tool 6 of the rotary body 56 for valve operation. The pressed portion 56b is configured to be received by the receiving and supporting portion 36r so as to prevent lifting in a state where rotation around the operation axis X of the rotary body 56 for valve operation is allowed. Further, the operating piece 55B is configured to receive and support the operated piece 56A from the upper side (outer side).

[0088] That is, the operating piece 55B of the rotary body 55 receives the operated piece 56A from the upper side (outer side) so as to prevent the lifting of the operated piece 56A of the rotary body 56 for valve operation, and the receiving and supporting portion 36r provided on the upper surface portion of the front-side casing 36F receives the pressed portion 56b of the rotary body 56 for valve operation from the upper side (outer side), thereby preventing the rotary body 56 for valve operation from coming off from the upper surface portion of the front-side casing 36F to the upper side (outer side).

[0089] As shown in FIGS. 8 to 11, on the upper surface side of the arc-shaped portion 56B of the rotary body 56 for valve operation, a pin operation groove U (an example of a valve operation groove) into which the lower end portion (tip portion) of the connecting pin 46 attached to the valve body 25A of the fuel control valve 25 engages is formed in a spiral groove shape centered on the operation axis X. Specifically, the pin operation groove U is formed in a state where the groove portion located on the left side is positioned more forward of the stove in a front view of the gas stove.

[0090] Therefore, by rotating the peripheral wall portion Ha of the connecting rod operating tool 6, the operating piece 55B of the rotary body 55 that rotates integrally with the peripheral wall portion Ha rotates the rotary body 56 for valve operation. Due to the rotation of the rotary body 56 for valve operation, the connecting pin 46 that engages with the pin operation groove U moves in the front-rear direction of the stove, and the valve body 25A of the fuel control valve 25 moves in the front-rear direction of the stove, so that the supply amount of the gas fuel can be adjusted.

[0091] And since the pin operation groove U is formed such that the groove portion located on the left side is positioned more forward of the stove in the front view of the gas stove, as the peripheral wall portion Ha of the stove operation tool 6 is rotated to the right, the valve body 25A of the fuel control valve 25 is moved forward of the stove, and the configuration is such that the supply amount of the gas fuel increases.

[0092] (Regarding the mechanical interlocking mechanism) The heating power of the stove burner 1 will be adjusted between low fire (for example, 330 kcal / h) and high fire (for example, 3000 kcal / h) by the fuel control valve 25. However, the stove burner 1 of the present embodiment is preferably ignited at medium fire (ignition gas amount, for example, 1800 kcal / h) between low fire and high fire when igniting. Therefore, as shown in FIGS. 16 to 19, even when the fuel control valve 25 is operated to the low fire side or the high fire side from the medium fire (ignition gas amount position), when the stove operation tool 6 is pushed and moved from the combustion position C toward the fire extinguishing operation position D, a mechanical interlocking mechanism N that links the stove operation tool 6 and the fuel control valve 25 is provided to position (return) the fuel control valve 25 at a position corresponding to the medium fire (ignition gas amount position).

[0093] As shown in FIG. 11, plate-shaped cam forming portions 55C that connect the cylindrical main body 55A of the rotating body 55 and the operation piece 55B are provided on both sides of the operation piece 55B in the rotating body 55. That is, the cam forming portion 55C is integrally formed with the operation piece 55B in a state of extending to the side where a cam operating body 57 described later exists through the outside of the front casing 36F and in a state of extending from the side edge portion of the operation piece 55B.

[0094] Then, among the pair of cam formation portions 55C, the rear end portion of the left cam formation portion 55C in the front view of the gas stove forms a low-fire side return operation cam WL (see FIGS. 18 and 19) that is positioned closer to the front side of the stove as it moves away from the operation piece 55B as a return operation cam W. The rear end portion of the right cam formation portion 55C in the front view of the gas stove among the pair of cam formation portions 55C forms a high-fire side return operation cam WR (see FIGS. 16 and 17) that is positioned closer to the front side of the stove as it moves away from the operation piece 55B as a return operation cam W.

[0095] As shown in FIGS. 11, 16, and 17, in the front view of the gas stove, at the right side portion of the outer periphery of the front side casing 36F, as a cam operation body 57, a high-fire side cam operation protrusion 57R that contacts the high-fire side return operation cam WR when the stove operation tool 6 in a state of being operated on the stronger fire side than the medium fire for ignition is pushed and moved from the combustion position C toward the fire extinguishing operation position D is provided.

[0096] Therefore, when the stove operation tool 6 is pushed and moved from the combustion position C toward the fire extinguishing operation position D while pressing the end face portion Hb of the stove operation tool 6 in a state of being operated on the stronger fire side than the medium fire for ignition, the high-fire side return operation cam WR contacts the high-fire side cam operation protrusion 57R, and thus the rotating body 55 is configured to be returned and rotated to the ignition gas amount position corresponding to the medium fire for ignition.

[0097] As shown in FIGS. 18 and 19, in the front view of the gas stove, at the left side portion of the outer periphery of the front side casing 36F, as a cam operation body 57, a low-fire side cam operation protrusion 57L that contacts the low-fire side return operation cam WL when the stove operation tool 6 in a state of being operated on the weaker fire side than the ignition gas amount position for ignition is pushed and moved from the combustion position C toward the fire extinguishing operation position D is provided.

[0098] Therefore, when the cooking utensil 6 for the stove is pushed and moved from the combustion position C toward the fire extinguishing operation position D while pressing the end face portion Hb of the cooking utensil 6 for the stove in a state where it is operated on the weak fire side rather than the ignition gas amount position for ignition, the weak fire side return operation cam WL contacts the strong fire side cam operation projection 57R, thereby configuring the rotating body 55 to be rotationally returned to the rotation position corresponding to the medium fire for ignition.

[0099] Incidentally, the front end side portions of the weak fire side return operation cam WL and the strong fire side return operation cam WR are formed in a state parallel to the operation axis X, and when the cooking utensil 6 for the stove pushed and moved from the combustion position C toward the fire extinguishing operation position D is then located at the fire extinguishing position A or the ignition position B, the rotating body 55 rotationally returned to the rotation phase corresponding to the medium fire is configured to be maintained in that rotation phase.

[0100] By the way, since the main body cap 53 constituting the end face portion Hb of the cooking utensil 6 for the stove is configured to be rotatable around the operation axis X with respect to the main body portion 52 constituting the peripheral wall portion Ha of the cooking utensil 6 for the stove as described above, when the cooking utensil 6 for the stove is pushed and moved from the combustion position C toward the fire extinguishing operation position D while pressing the end face portion Hb of the cooking utensil 6 for the stove, even if the peripheral wall portion Ha of the cooking utensil 6 for the stove rotates with the rotation of the rotating body 55, the end face portion Hb of the cooking utensil 6 for the stove does not rotate. Therefore, the pressing operation of the end face portion Hb of the cooking utensil 6 for the stove can be performed well without a sense of discomfort.

[0101] (Regarding rice cooking) After the cooking utensil 6 for the stove is operated to the ignition position and the ignition process is executed, when the rice cooking (rice cooking mode) is selected, the operation control unit Q controls the amount of fuel gas supplied to the burner in a state where the fuel control valve 25 is maintained at the ignition gas amount position to be less than the ignition gas amount and to the rice cooking gas amount for rice cooking, and is configured to execute the rice cooking (rice cooking mode).

[0102] As shown in Fig. 4, the rice-cooking process (rice-cooking mode) includes a water-absorbing process, a boiling process following the water-absorbing process, a steaming process following the boiling process, and a simmering process following the steaming process. In the water-absorbing process, after the ignition process, until the temperature detection sensor S detects the first set temperature t1 (for example, 90°C), the medium fire corresponding to the gas amount for ignition (for example, 1800 kcal / h) is maintained, and then it is burned with a small fire (weak fire) corresponding to the gas amount for small fire (330 kcal / h).

[0103] That is, in this embodiment, in the first half of the water-absorbing process, the electromagnetic valve 26 on the stove side is opened to maintain the medium fire, and in the second half of the water-absorbing process, the electromagnetic valve 26 on the stove side is closed to change to a small fire. Note that in the first half of the water-absorbing process, it may also be implemented in a form where the electromagnetic valve 26 on the stove side is closed to change to a small fire.

[0104] The small fire combustion time for executing the small fire is changed and set based on the first elapsed time, which is the elapsed time from the ignition process until the temperature detection sensor S detects the first set temperature t1 (for example, 90°C). For example, as shown in the table of Fig. 5, when the first elapsed time is less than 180 seconds, the small fire combustion time is set to 480 seconds, and when the first elapsed time is 260 seconds or more, the small fire combustion time is set to 180 seconds. That is, the small fire combustion time is set based on the first elapsed time. Note that the first elapsed time is the elapsed time from the initial temperature (for example, normal temperature) until the temperature detection sensor S detects the first set temperature t1 (for example, 90°C), and it increases and decreases with the temperature rise gradient of the detected temperature of the temperature detection sensor S in the first half of the water-absorbing process. Therefore, the first elapsed time corresponds to the temperature rise gradient of the detected temperature of the temperature detection sensor S in the first half of the water-absorbing process.

[0105] The boiling process consists of a front-side boiling process and a rear-side boiling process. The time for executing the front-side boiling process is the A control time, and the time for executing the rear-side boiling process is the B control time. In the cooking process, by repeatedly opening and closing the stove-side solenoid valve 26, the medium heat corresponding to the ignition gas amount (for example, 1800 kcal / h) and the low heat (weak fire) corresponding to the low-fire gas amount (for example, 330 kcal / h) are repeated, and the cooking fire corresponding to the cooking gas amount (for example, 1100 kcal / h) is adjusted.

[0106] In this embodiment, the operation control unit Q is configured to make the cooking gas amount in the front-side cooking process larger than the cooking gas amount in the rear-side cooking process by varying the opening and closing ratio for repeatedly opening and closing the stove-side solenoid valve 26.

[0107] The A control time for executing the front-side cooking process is variably set based on the above-described first elapsed time, that is, the first elapsed time until the temperature detection sensor S detects the first set temperature t1 (for example, 90°C) after the ignition process. For example, as shown in the table of FIG. 6, when the first elapsed time is less than 180 seconds, the A control time is set to 210 seconds, and when the first elapsed time is 260 seconds or more, the A control time is set to 630 seconds. The A control time is variably set in five stages based on the first elapsed time. Also, as shown in the table of FIG. 6, the cooked rice amount is set in five stages from 1 to 5 based on the first elapsed time.

[0108] When the A control time corresponding to the front-side cooking process elapses, the rear-side cooking process is executed. The B control time for executing the rear-side cooking process is the time until an equilibrium state is detected based on the detected temperature of the temperature detection sensor S. The detection of the equilibrium state is performed, for example, every fixed determination period (for example, every 30 seconds), and the temperature difference TS (= Te - Tb) obtained by subtracting the detected temperature Tb of the temperature detection sensor S at the start point of the determination period from the detected temperature Te of the temperature detection sensor S at the end point of the determination period is obtained. Then, when the temperature difference TS (= Te - Tb) falls within a predetermined temperature range, for example, a temperature range of -2°C or more and +2°C or less (-2°C ≤ TS ≤ +2°C), it is configured to detect that it is in an equilibrium state. Further, when a balanced state is detected, the temperature is stored as the second set temperature t2.

[0109] In the front-side cooking-up process, when repeatedly opening and closing the stove-side solenoid valve 26, the medium-fire time for opening the stove-side solenoid valve 26 and maintaining medium fire is, for example, 10 seconds, and the low-fire time for closing the stove-side solenoid valve 26 and maintaining low fire is, for example, 10 seconds. Further, it is preferable that the medium-fire time for maintaining medium fire is at most 20 seconds. If the medium-fire time is too long, there is a possibility that appropriate rice cooking cannot be performed. In the rear-side cooking-up process, when repeatedly opening and closing the stove-side solenoid valve 26, the medium-fire time for opening the stove-side solenoid valve 26 and maintaining medium fire is, for example, 5 seconds, and the time for closing the stove-side solenoid valve 26 and maintaining low (weak) fire is, for example, 15 seconds.

[0110] That is, in the rear-side cooking-up process, since the moisture has decreased and the rice at the bottom of the pot is likely to be colored, the heating power in the rear-side cooking-up process is controlled lower than the heating power in the front-side cooking-up process. However, in the present embodiment, in the front-side cooking-up process, when repeatedly opening and closing the stove-side solenoid valve 26, the medium-fire time for opening the stove-side solenoid valve 26 and maintaining medium fire and the low-fire time for closing the stove-side solenoid valve 26 and maintaining low fire are changed and set in five steps according to the five steps of 1 to 5 of the above-described rice-cooking amount as shown in the table of FIG. 7.

[0111] The steaming process performs a front-side steaming process of heating with low fire until a C control time (for example, 2 minutes) elapses, and then performs a rear-side steaming process of heating with medium fire for a D control time. The D control time is the time until the detected temperature of the temperature detection sensor S rises by a set rise temperature (for example, 30°C) or more from the second set temperature t2.

[0112] The steaming process is a process of waiting until a preset steaming time elapses with the stove burner 1 extinguished.

[0113] 〔Alternative Embodiment〕 The following lists alternative embodiments. (1) In the above embodiment, when the mechanical interlocking mechanism N pushes and moves the cooking appliance 6 to the fire extinguishing operation position D, the fuel control valve 25 is repositioned to the ignition gas amount position, so that when the cooking appliance 6 is operated to the ignition position, the fuel control valve 25 is configured to be positioned at the ignition gas amount position. However, the mechanical interlocking mechanism N may be implemented in such a form that when the cooking appliance 6 is pushed and moved to the ignition position B, the fuel control valve 25 is repositioned to the ignition gas amount position.

[0114] (2) In the above embodiment, the peripheral wall portion Ha of the combustion operation tool H is externally fitted in a state of integrally rotating with respect to the cylindrical main body 55A of the rotating body 55 provided with the operation piece 55B, and the case where the peripheral wall portion Ha is provided with the operation piece 55B is exemplified. However, it may be implemented in a form in which the peripheral wall portion Ha and the operation piece 55B are integrally formed.

[0115] (3) In the above embodiment, the case where the ignition heat of the cooking burner 1 is medium heat is exemplified. However, the present invention can also be applied when the ignition heat of the cooking burner 1 is high heat (strong heat).

[0116] (4) In the above embodiment, the case where the fuel control valve 25 is provided in the main flow path 29A is exemplified. However, for example, the fuel control valve 25 may be provided in a flow path different from the main flow path 29A, such as providing the fuel control valve 25 in the main flow path 28.

[0117] (5) In the above embodiment, the first elapsed time, which is the elapsed time until the temperature detection sensor S detects the first set temperature t1 (for example, 90°C) after the ignition process, is taken as the temperature increase gradient of the detection temperature of the temperature detection sensor S in the first half of the water absorption process. However, for example, it may be implemented in a form in which the difference between the initial detection temperature several seconds after the ignition process and the temperature at the time when several tens of seconds have elapsed since the ignition process is obtained as the temperature increase gradient of the detection temperature of the temperature detection sensor S in the first half of the water absorption process.

[0118] In addition, the configurations disclosed in the above embodiments (including other embodiments, the same shall apply hereinafter) can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction. Also, the embodiments disclosed in this specification are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified within the scope not departing from the object of the present invention.

Explanation of Reference Numerals

[0119] 1 Burner 6 - point Fire Extinguishing Operating Tool 25 Fuel Control Valve 26 On - Off Valve 28 Fuel Gas Supply Path 29A Main Flow Path 29B Bypass Flow Path B Ignition Position N Mechanical Interlocking Mechanism Q Control Unit S Temperature Detection Unit

Claims

1. A gas stove provided with a manually operated fuel control valve for variably adjusting the amount of fuel gas supplied to a burner, a mechanical linkage mechanism that links the ignition and extinguishing operating tool and the fuel control valve so that when the manually operated ignition and extinguishing operating tool is operated to the ignition position, the fuel control valve is positioned at the ignition gas amount position, and a control unit that controls the amount of fuel gas supplied to the burner in a state where the fuel control valve is maintained at the ignition gas amount position to a cooking gas amount for cooking rice that is less than the ignition gas amount when the cooking rice mode is selected after the ignition operation tool is operated to the ignition position and the ignition process is executed. The gas stove is provided with: a main flow path having a single on-off valve and a bypass flow path that connects an upstream portion and a downstream portion of the main flow path and allows a fuel gas with a set low flow rate to flow, arranged in parallel in the fuel gas supply path of the burner, wherein no other flow path having a single other on-off valve is provided in the fuel gas supply path other than the main flow path, the control unit repeatedly opens and closes the on-off valve to adjust to a cooking gas amount for cooking rice, which is one of the cooking gas amounts for cooking rice, and the fuel control valve is provided in the main flow path.

2. A gas stove provided with a manually operated fuel control valve for variably adjusting the amount of fuel gas supplied to a burner, a mechanical linkage mechanism that links the ignition and extinguishing operating tool and the fuel control valve so that when the manually operated ignition and extinguishing operating tool is operated to the ignition position, the fuel control valve is positioned at the ignition gas amount position, and a control unit that controls the amount of fuel gas supplied to the burner in a state where the fuel control valve is maintained at the ignition gas amount position to a cooking gas amount for cooking rice that is less than the ignition gas amount when the cooking rice mode is selected after the ignition operation tool is operated to the ignition position and the ignition process is executed. The gas stove is provided with: a main flow path having a single on-off valve and a bypass flow path that connects an upstream portion and a downstream portion of the main flow path and allows a fuel gas with a set low flow rate to flow, arranged in parallel in the fuel gas supply path of the burner, wherein no other flow path having a single other on-off valve is provided in the fuel gas supply path other than the main flow path, the control unit repeatedly opens and closes the on-off valve to adjust to a cooking gas amount for cooking rice, which is one of the cooking gas amounts for cooking rice, and the cooking rice mode is defined as a water absorption step and a cooking step following the water absorption step. A gas cooker in which the control unit closes the on-off valve in at least the latter half of the water absorption step to adjust to a small fire gas amount as one of the rice cooking cooking gas amounts, and adjusts to the boiling gas amount in the boiling step.

3. The gas cooker according to claim 1 or 2, wherein the control unit adjusts the boiling gas amount in multiple stages by varying the opening / closing ratio at which the on-off valve is repeatedly opened and closed.

4. The boiling step consists of a front-side boiling step and a rear-side boiling step. The gas cooker according to claim 2, wherein the control unit makes the boiling gas amount in the front-side boiling step larger than the boiling gas amount in the rear-side boiling step by varying the opening / closing ratio at which the on-off valve is repeatedly opened and closed.

5. A temperature detection unit for detecting the temperature of the rice cooking cooker heated by the burner is provided. The gas cooker according to claim 4, wherein the control unit opens the on-off valve in the first half of the water absorption step, and determines the front-side step time for performing the front-side boiling step based on the temperature increase gradient of the detected temperature detected by the temperature detection unit in the first half.

6. A temperature detection unit for detecting the temperature of the rice cooking cooker heated by the burner is provided. The gas cooker according to any one of claims 2, 4, and 5, wherein the control unit opens the on-off valve in the first half of the water absorption step, and determines the water absorption step time for performing the latter half of the water absorption step based on the temperature increase gradient of the detected temperature detected by the temperature detection unit in the first half.

Images