JP6612691B2 - Gas stove - Google Patents

Description

  The present invention relates to a gas stove, and more particularly to a gas stove provided with a temperature sensor that detects the temperature by contacting the bottom of a cooking vessel placed on the virtues.

  Conventionally, as a technology in the field of such a gas stove, temperature detection means (temperature sensor) is brought into contact with the bottom of the cooking container to detect the temperature of the cooking container, and when the detected temperature exceeds a set temperature, the heating power is weakened. Or what has an overheat prevention function which extinguishes automatically is known.

  For example, Patent Literature 1 below discloses a gas stove that includes an annular gas burner, a thermal head that is arranged to be movable in the vertical direction at the center of the gas burner, and a temperature detection means that is attached to the inside of the thermal head. Yes. The temperature detecting means is urged upward together with the thermal head by an urging means such as a spring. When the cooking container is placed on the virtues, the temperature detecting means moves downward against the urging force due to the weight of the cooking container, and comes into contact with the bottom of the cooking container via the thermal head. , Always detect the temperature at that time.

JP 2012-83085 A

  However, in the above-described gas stove, in a state where the cooking container is not placed on the virtues, the temperature detecting means is positioned above the virtues by the urging force of the urging means, so the cooking containers are placed on the virtues. In order to cause the cooking container to come into contact with the temperature detecting means, it is necessary to push down the temperature detecting means against the urging force of the urging means. For this reason, the pressing load of the temperature detection means is applied to the cooking container. And when the urging | biasing force of an urging means is too strong, the press load to the cooking container of a temperature detection means will also become large. For this reason, the cooking container placed on the virtues becomes unstable and may fall over. In particular, in the case of a lightweight cooking container such as a snow pan, it is easy to fall.

  In order to solve such a problem, for example, a method has been proposed in which the biasing force is reduced by reducing the spring coefficient, and the pressure load applied to the cooking container by the temperature detecting means is reduced. However, when the urging force of the urging means is weakened, the force for supporting the temperature detecting means is also weakened, so that a problem such as erroneous detection of temperature has newly occurred.

  Moreover, in the gas stove described above, when there is an operation of shifting the cooking container after placing the cooking container on the five virtues, there is a possibility that the temperature detecting means hits at the bottom of the cooking container. For this reason, there is a problem that erroneous temperature detection is likely to occur.

  The present invention has been made in view of the above points, and even when a lightweight cooking container is placed on the five virtues, the cooking container can be prevented from overturning due to the contact of the temperature detection means, And it aims at providing the gas stove which can suppress generation | occurrence | production per piece to the cooking container bottom part of a temperature detection means.

  A gas stove according to the present invention for solving the above-mentioned problems is a gas stove having a gas burner and five victories for placing a cooking vessel around the upper portion of the gas burner, and detects the temperature by contacting the bottom of the cooking vessel. Means, lifting and lowering means for holding the temperature detecting means up and down in the vertical direction, pressing load detecting means for detecting the pressing load of the temperature detecting means to the cooking container, and control means for controlling the gas stove The control means controls the raising and lowering of the elevating means based on the pressing load detected by the pressing load detecting means.

  In the gas stove according to the present invention, the pressing load detecting means for detecting the pressing load on the cooking container of the temperature detecting means is provided, so that the pressing load can be always grasped. Since the control means controls the raising and lowering of the raising / lowering means based on the pressing load detected by the pressing load detecting means, the temperature detecting means is moved in the vertical direction according to the shape of the bottom of the cooking container placed on the virtues or the movement of the cooking container. By moving to, the contact state between the temperature detecting means and the bottom of the cooking container can be adjusted.

  As a result, it is possible to prevent the cooking container from falling from the five virtues due to the contact of the temperature detection means, and to suppress the occurrence of per contact of the temperature detection means on the bottom of the cooking container. Therefore, even if a lightweight cooking container is placed on the virtues, the cooking container can be reliably prevented from falling from the virtues due to the contact of the temperature detecting means.

  In the gas stove according to the present invention, the control means raises the elevating means until the detected value of the pressing load detected by the pressing load detecting means becomes a set value of the pressing load to the cooking container of the temperature detecting means. It is preferable to control such that In this way, the temperature detection means is reliably brought into contact with the bottom of the cooking container, so that the accuracy of temperature detection can be ensured.

  Further, in the gas stove according to the present invention, before the detected value of the pressing load detected by the pressing load detecting means becomes a set value of the pressing load to the cooking container of the temperature detecting means, the temperature detecting means When the predetermined position above the five virtues is reached, it is preferable that the control means performs control so as to stop the lifting of the elevating means. In this way, for example, in the case of cooking such as cooking, the convenience of the gas stove can be maintained by raising the temperature detection means to a predetermined position above the five virtues.

  In the gas stove according to the present invention, it is preferable that the gas detection stove further includes a changing unit that changes a set value of a pressing load applied to the cooking container by the temperature detecting unit. In this way, it is possible to improve the usability and maintainability of the gas stove.

  In the gas stove according to the present invention, it is preferable that the gas stove further includes display means for displaying a detected value of the pressing load detected by the pressing load detection means. In this way, since the detected value of the pressing load can always be visually recognized, the relationship between the detected value of the pressing load and the set value of the pressing load can be easily grasped. Therefore, for example, when the maintenance worker changes the set value of the pressing load on the cooking container of the temperature detecting means to a more appropriate value based on the relationship between the detected value of the pressing load and the set value, It is possible to more reliably prevent the cooking container from falling from the five virtues due to contact.

  Further, in the gas stove according to the present invention, when the cooking container is removed from the five virtues after the temperature detecting means comes into contact with the bottom of the cooking container, the control means is configured such that the temperature detecting means is It is preferable to control the elevating and lowering means so as to reach a predetermined position above the five virtues. In this way, for example, when the cooking container is temporarily removed from the virtues during cooking, the temperature detection means rises to a predetermined position above the virtues and waits there, thereby generating a false temperature detection. Can be suppressed. In addition, since the gas stove does not extinguish immediately, the convenience of the gas stove can be maintained.

  In the gas stove according to the present invention, in a state where the cooking container is not placed on the virtues, the control means raises and lowers the elevation means so that the temperature detection means is located below the virtues. It is preferable to control. In this way, when the cooking container is placed on the virtues, there is no pressing load of the temperature detecting means, so that the cooking container can be reliably prevented from falling. Moreover, since the temperature detection means is arrange | positioned below five virtues, while being able to improve the beauty | look of a gas stove, cleaning of a gas stove can be performed easily.

  In the gas stove according to the present invention, it is preferable that the elevating unit includes a motor and an elevating member that can be moved up and down by driving the motor, and the control unit controls driving of the motor. . In this way, the structure of the lifting / lowering means can be simplified and an effect of cost reduction can be expected.

  In the gas stove according to the present invention, the motor is preferably provided with an encoder. In this way, the position of the temperature detecting means can be easily detected based on the number of rotations of the motor detected by the encoder. In addition, the structure can be simplified as compared with the case where a sensor for position detection is exclusively provided.

  Furthermore, in the gas stove according to the present invention, it is preferable that the pressing load detecting means is a load cell arranged between the elevating means and the temperature detecting means. If it does in this way, while being able to detect the pressing load to the cooking container by a temperature detection means easily, the influence on the magnitude | size of the gas stove by installation of a load detection means can be suppressed.

  According to the present invention, even when a lightweight cooking container is placed on the virtues, the occurrence of the falling of the cooking container can be prevented by the contact of the temperature detection means, and the piece of the temperature detection means on the bottom of the cooking container The occurrence of hits can be suppressed.

The schematic diagram which shows the basic composition of the gas stove which concerns on embodiment. The flowchart which shows the control process of the gas stove which concerns on embodiment. The flowchart which shows the control process of the gas stove which concerns on embodiment. The flowchart which shows the normal stop operation of the gas stove which concerns on embodiment.

  Hereinafter, an embodiment of a gas stove according to the present invention will be described with reference to the drawings. In the following embodiment, the “vertical direction” and “horizontal direction” are based on the normal use state of the gas stove.

  Drawing 1 is a mimetic diagram showing the basic composition of the gas stove concerning an embodiment. The gas stove 1 according to this embodiment is applied to both a gas table type and a built-in type, and includes an annular gas burner 2 disposed in an opening 12 formed in the top plate 11, and a gas burner 2. The five virtues 3 arranged around the upper part and a control unit (control means) 7 for controlling the gas stove 1 are provided.

  The gas burner 2 is an annular bunsen burner having an inner cylinder 21 and an outer cylinder 22, and a premixed gas flow path 23 is formed in the space between the inner cylinder 21 and the outer cylinder 22. The outer cylinder 22 has a vertical portion extending in the up-down direction and a horizontal portion extending bent in the horizontal direction. The gas flow path 23 is also bent in the horizontal direction by bending the outer cylinder 22 in the horizontal direction. Air is taken into the gas passage 23, and combustion gas and air are mixed in the gas passage 23.

  The downstream upper end of the gas flow path 23 is closed by an annular burner cap 25, and the upstream lower end is connected to a gas supply pipe for supplying combustion gas (not shown). The gas flow path 23 is provided with an electromagnetic valve 26 for adjusting the gas flow rate and a safety valve 27. The electromagnetic valve 26 and the safety valve 27 are each connected to the control unit 7, and transmit their own information to the control unit 7 and receive instructions from the control unit 7.

  The inner cylinder 21 extends in the vertical direction and serves as a secondary air flow path for supplying secondary air to the gas burner 2. The inner cylinder 21 also serves as a space for accommodating a temperature sensor 41, a support bar 43 and the like which will be described later. As shown in FIG. 1, a plurality of flame openings 24 formed by opening the peripheral wall of the outer cylinder 22 are arranged at the upper end portion of the gas burner 2. Although not shown, an igniter for igniting and a thermocouple for detecting a flame are disposed outside the outer cylinder 22 and in the vicinity of the flame opening 24.

  The virtues 3 are arranged concentrically with the gas burner 2 so as to surround the gas burner 2. The virtues 3 are composed of a plurality of claw portions 32 having a placement surface 31 on which the cooking container 13 is placed, and leg portions 33 for fixing the claw portions 32 to the top plate 11 respectively. The claw portions 32 are arranged every 60 ° in the circumferential direction of the gas burner 2 and extend radially from the center of the gas burner 2.

  Further, the gas stove 1 includes a thermal head 4 that is arranged in the center of the gas burner 2 so as to be movable in the vertical direction. The thermal head 4 is formed in a cylindrical shape, and a temperature sensor (temperature detection means) 41 composed of a thermistor is provided therein. As shown in FIG. 1, the temperature sensor 41 is attached to the ceiling of the thermal head 4 and abuts against the bottom of the cooking container 13 via the thermal head 4 to detect the bottom temperature of the cooking container 13. . The temperature sensor 41 is connected to the control unit 7 via a lead wire 42.

  The thermal head 4 is supported by a support bar 43 disposed below, and the support bar 43 has a hollow structure, in which a lead wire 42 is accommodated. The thermal head 4, the temperature sensor 41, and the support rod 43 are disposed inside the inner cylinder 21 so as to be inserted into the inner cylinder 21.

  A load cell (pressing load detecting means) 5 is attached to the lower end of the support bar 43. The load cell 5 detects a pressing load applied to the cooking container 13 by the temperature sensor 41 when the temperature sensor 41 contacts the bottom of the cooking container 13, and transmits the detected result to the control unit 7. The load cell 5 is disposed below the load cell 5 and supported by an elevating rod 65 that extends in the vertical direction. In addition, in order to suppress the influence on the magnitude | size of the gas stove 1 by installation of the load cell 5, the strain gauge type thing is used for the load cell 5. FIG.

  Further, the gas stove 1 includes an elevating means 6 that elevates and lowers the thermal head 4 including the temperature sensor 41 in the vertical direction. A ball screw structure provided with a motor is used for the lifting means 6. Specifically, the elevating means 6 includes a motor 61, a long ball screw 62 connected to the motor 61 and extending in the vertical direction, and a ball screw nut 63 attached to the ball screw 62. . The ball screw nut 63 is fixed to the lifting rod 65 via a connecting rod 66. The ball screw 62, the ball screw nut 63, the elevating rod 65, and the connecting rod 66 constitute the “elevating member” described in the claims.

  In the lifting / lowering means 6 having such a configuration, when the motor 61 rotates, the ball screw 62 also rotates, and the ball screw nut 63 is moved along the ball screw 62 in the vertical direction. Along with this, the lifting rod 65 moves up and down. And the temperature sensor 41 supported by the raising / lowering rod 65 via the support rod 43 and the load cell 5 moves to an up-down direction. The elevating means 6 has an encoder 64 that detects the number of rotations of the motor 61. The encoder 64 transmits information on the detected rotational speed of the motor 61 to the control unit 7.

  The gas stove 1 further includes an operation unit 8 for receiving a user's operation. The operation unit 8 is a touch panel type provided on the top plate 11, and includes a display unit 81 that displays information including an error message, an operation button unit 82 that performs each operation, and a setting unit that sets each setting. 83. For example, a power button, a button for igniting or extinguishing the gas burner 2, a thermal power adjusting button for adjusting the thermal power of the gas burner 2, and the like are arranged in the operation button portion 82.

  The setting part 83 mainly performs each setting regarding use of the gas stove 1, and can set a cooking mode, cooking time, etc., for example. In addition to the setting function described above, the setting unit 83 may also have a function of changing the set value of the pressing load on the cooking container 13 of the temperature sensor 41. And in order to change the setting value of the pressing load on the user side, the setting unit 83 may be configured to freely change the setting value of the pressing load by the user's finger operation. When the set value of the pressing load is changed, the setting unit 83 transmits the changed setting value of the pressing load to the pressing load changing unit 74 of the control unit 7 described later. On the other hand, the change of the pressing load set value by the maintenance worker may be performed by the setting unit 83 or may be performed by the pressing load changing unit 74.

  The control unit 7 is mainly configured by a computer including a CPU, a ROM, and a RAM, for example, and performs each control of the gas stove 1. The control unit 7 includes a combustion control unit 70 that controls the combustion of the gas burner 2, a motor drive unit 73 that controls the driving of the motor 61, and a pressure that changes the set value of the pressure load applied to the cooking container 13 by the temperature sensor 41. And a load changing portion (changing means) 74. The pressing load changing unit 74 is formed so that the setting value of the pressing load can be automatically changed based on the control command of the control unit 7, and the setting value of the pressing load can be changed by an input operation of the maintenance worker. It is configured. Further, the pressing load changing unit 74 is connected to the setting unit 83. When the setting value of the pressing load is changed by the setting unit 83, the setting value of the pressing load transmitted from the setting unit 83 is received. In addition, the set values are managed. The control unit 7 further includes a position detection unit 71 and a determination unit 72. The position detector 71 detects the position of the temperature sensor 41 by calculating the distance of the temperature sensor 41 ascending or descending based on the rotation speed of the motor 61 transmitted from the encoder 64. The determination unit 72 performs each determination process related to the control of the gas stove 1.

  Furthermore, the control unit 7 includes a display unit 75 that displays the detected value of the pressing load detected by the load cell 5. The display unit 75 is configured by, for example, a monitor, and displays the latest data related to the pressure load applied to the cooking container 13 by the temperature sensor 41 detected by the load cell 5. And it is preferable that the graph which shows the relationship between the detected value of a pressing load and time is displayed on this display part 75. FIG. In this way, the maintenance worker can easily grasp the relationship between the detected value of the pressing load and the set value.

  Since the gas stove 1 configured as described above includes the load cell 5 that detects the pressing load applied to the cooking container 13 by the temperature sensor 41, the pressing load can be always grasped. Since the controller 7 controls the lifting / lowering means 6 based on the pressure load detected by the load cell 5, the temperature sensor is adjusted according to the shape of the bottom of the cooking container 13 placed on the virtues 3 or the movement of the cooking container 13. By moving 41 in the vertical direction, the contact state between the temperature sensor 41 and the bottom of the cooking vessel 13 can be adjusted.

  As a result, it is possible to prevent the cooking container 13 from falling from the virtues 3 due to the contact of the temperature sensor 41 and to prevent the temperature sensor 41 from hitting the bottom of the cooking container 13. Thereby, even if the lightweight cooking container 13 is placed on the virtues 3, the falling of the cooking container 13 from the virtues 3 due to the contact of the temperature sensor 41 can be reliably prevented.

  Moreover, since the setting part 83 and the pressing load change part 74 which change the setting value of the pressing load to the cooking container 13 of the temperature sensor 41 are provided, a user or a maintenance worker can set a pressing load according to a use condition. The set value can be changed, and the usability and maintainability of the gas stove 1 can be improved. Furthermore, since the display unit 75 that displays the detected value of the pressing load detected by the load cell 5 is provided, the detected value of the pressing load can be always visually recognized via the display unit 75, and the detected value of the pressing load and the pressing load can be detected. The relationship with the set value can be easily grasped. Thereby, for example, the maintenance worker changes the set value of the pressing load on the cooking container 13 of the temperature sensor 41 to a more appropriate value based on the relationship between the detected value and the set value of the pressing load, thereby the temperature sensor 41. It is possible to more reliably prevent the cooking container 13 from falling from the virtues 3 due to the contact.

  In the gas stove 1 according to the present embodiment, the temperature sensor 41 is disposed below the virtues 3 (for example, below the burner cap 25) when the cooking container 13 is not placed on the virtues 3. ing. By doing in this way, when the cooking container 13 is mounted on the virtues 3, there is no pressing load of the temperature sensor 41, so that the cooking container 13 can be prevented from overturning, and the gas stove 1 has a beautiful appearance. And can be easily cleaned. When the ignition operation is performed, the temperature sensor 41 is pushed up by the elevating means 6 and is raised by driving the motor 61.

  Further, since the ball screw structure including the motor 61 is used for the elevating means 6, the structure of the elevating means 6 can be simplified and the effect of cost reduction can be expected. Further, since the motor 61 is provided with the encoder 64, the position of the temperature sensor 41 can be easily detected based on the number of rotations of the motor 61 detected by the encoder 64, and a sensor for position detection is provided exclusively. The structure can be simplified compared to the case.

  Hereinafter, the control process of the gas stove 1 will be described with reference to FIGS. 2A and 2B. This control process is started when the user turns on the power. First, a button operation is performed in the process of S11. At this time, the user presses the ignition button provided in the operation button unit 82.

  In the process of S12 following the process of S11, it is determined whether or not circuits such as sensors are normal. At this time, the determination unit 72 checks an electric circuit and a control circuit connected to each sensor including the temperature sensor 41 and determines whether or not it is normal. And when it determines with circuits, such as sensors, not being normal, control processing progresses to S13. In the process of S13, the control unit 7 displays an error message on the display unit 81 of the operation unit 8 to notify the user and turns off the power. Then, when the process of S13 is finished, the control process is finished.

  On the other hand, when it is determined in the process of S12 that the circuits such as sensors are normal, the control process proceeds to S14 to determine whether or not the position of the motor 61 is normal. At this time, the determination unit 72 determines whether the position of the motor 61 is normal based on information transmitted from the motor 61 and the like. If it is determined that the position of the motor 61 is not normal, the control process proceeds to S15 and the cause is removed. At this time, the control unit 7 analyzes the cause of the abnormal position based on the information transmitted from the motor 61 and further removes the cause.

  In the process of S16 following the process of S15, the determination unit determines again whether or not the position of the motor 61 is normal. If it is determined that the position of the motor 61 is not normal, the control process proceeds to S13. On the other hand, if it is determined in step S16 that the position of the motor 61 is normal, the control process proceeds to step S17 described later.

  In the process of S14 described above, when it is determined that the position of the motor 61 is normal, the control process proceeds to S17. In the process of S <b> 17, the control unit 7 raises the temperature sensor 41 by operating the elevating means 6. Specifically, the motor drive unit 73 transmits a drive instruction to the motor 61, and the motor 61 rotates in response to the instruction. As the motor 61 rotates, the elevating rod 65 rises, and the thermal head 4 and the temperature sensor 41 connected to the elevating rod 65 also rise. As a result, the temperature sensor 41 moves upward from a position below the original virtues 3.

  At this time, for example, the set value of the pressing load on the cooking container 13 of the temperature sensor 41 is set to 20 g. In this way, since the pressing load of the temperature sensor 41 on the cooking container 13 is small, when the temperature sensor 41 comes into contact with the bottom of the cooking container 13, the cooking container 13 is brought into contact with the virtue 3 by the contact of the temperature sensor 41. Can be prevented from falling.

  Then, in order to ensure that the temperature sensor 41 is in contact with the bottom of the cooking vessel 13 and to ensure the accuracy of temperature detection, the control unit 7 is configured until the detected value of the pressing load detected by the load cell 5 reaches a set value. The elevating means 6 is raised. However, for example, in the case of cooking such as cooking, the object to be cooked is often placed at a location away from the placement surface 31 of Gotoku 3 without being placed on Gotoku 3. To cope with this, in the present embodiment, even before the detected value of the pressing load reaches the set value, when the temperature sensor 41 reaches a predetermined position above the placement surface 31 of the virtues 3, the control unit 7 Stops the raising and lowering means 6. In this way, the convenience of the gas stove 1 can be maintained.

  Specifically, in the process of S18 following the process of S17, it is determined whether or not the position of the temperature sensor 41 exceeds 10 mm above the placement surface 31 of Gotoku 3. At this time, the position detection unit 71 of the control unit 7 calculates and detects the position of the temperature sensor 41 based on information such as the rotation speed of the motor 61 transmitted from the encoder 64, and the result is sent to the determination unit 72. Send. The determination unit 72 determines that the position of the temperature sensor 41 exceeds 10 mm above the placement surface 31 of the Gotoku 3 based on the result received from the position detection unit 71 and the position information of the placement surface 31 of the Gotoku 3 stored in advance. It is determined whether or not.

  When it determines with the position of the temperature sensor 41 exceeding 10 mm above the mounting surface 31 of Gotoku 3 by the process of S18, a control process progresses to above-mentioned S13. On the other hand, if it is determined that it has not exceeded, the control process proceeds to S19. In the process of S <b> 19, the determination unit 72 first acquires the stored set value of the pressing load on the cooking container 13 of the temperature sensor 41 and the detected value of the pressing load from the load cell 5. Next, the determination unit 72 determines whether or not the detected value of the pressing load is within a set value ± 1 g.

  If it is determined that the detected value is not within the range of the set value ± 1 g, the control process proceeds to S13 described above. On the other hand, if it is determined that the detected value is within the range of the set value ± 1 g, the control process proceeds to S20. In the process of S20, the temperature sensor 41 is stopped from rising. At this time, the motor drive unit 73 transmits a stop instruction to the motor 61 to stop the rotation of the motor 61.

  In the process of S21 following the process of S20, the control unit 7 transmits a control signal so that the safety valve 27 is opened. In the process of S22 following the process of S21, the determination unit 72 determines whether or not the safety valve 27 is open. If it is determined that the safety valve 27 is not open even though the control signal is transmitted to open, the control process proceeds to S23.

  In the process of S23, the control unit 7 displays the error message on the display unit 81 of the operation unit 8 to notify the user and turns off the safety valve 27 (that is, closes the safety valve 27). In the process of S24 following the process of S23, it is determined whether or not the cause is removed. At this time, the control unit 7 analyzes the cause of the safety valve 27 not opening based on the information transmitted from the safety valve 27, and further removes the cause. Thereafter, the determination unit 72 determines whether the cause has been removed.

  When it is determined that the cause has been removed in the process of S24, the control process returns to S21, and the control unit 7 transmits a control signal so that the safety valve 27 is opened again. On the other hand, if it is determined in step S24 that the cause has not been removed, the control process proceeds to step S13 described above.

  Further, in the above-described processing of S22, when it is determined that the safety valve 27 is open, the control processing proceeds to S25, and the electromagnetic valve ON and the igniter ON are performed. At this time, the control unit 7 transmits an instruction to open the solenoid valve 26 and an instruction to ignite the igniter. In the process of S26 following the process of S25, the determination unit 72 determines whether or not the igniter is normal.

  If it is determined that the igniter is not normal, the control process proceeds to S27. In the process of S27, the control unit 7 displays an error message on the display unit 81 of the operation unit 8 to notify the user, and turns off the safety valve 27 and the igniter. When the process of S27 is completed, the control process returns to S24 described above, and it is determined whether or not the cause is removed.

  On the other hand, if it is determined in S26 that the igniter is normal, the gas stove 1 is ignited and the control process proceeds to S28. In S28 process, the determination part 72 determines whether the thermoelectromotive force of a thermocouple is 2.5 mV or more. When it determines with the thermoelectromotive force of a thermocouple not being 2.5 mV or more, a control process returns to S27 mentioned above. On the other hand, when it is determined that the thermoelectromotive force is 2.5 mV or more, the control process proceeds to S29, and the control unit 7 turns off the igniter.

  In the process of S30 following the process of S29, the determination unit 72 further determines whether or not the temperature sensor 41 is normal. If it is determined that the temperature sensor 41 is not normal, the control process returns to S27 described above. On the other hand, if it is determined that the temperature sensor 41 is normal, the control process proceeds to S31. In the process of S <b> 31, the determination unit 72 determines whether or not the detected value of the pressing load applied to the cooking container 13 by the temperature sensor 41 is decreased based on the result detected by the load cell 5.

  Here, the decrease in the detected value is assumed, for example, when the cooking container 13 is removed from the Gotoku 3, or when the cooking container 13 is temporarily removed from the Gotoku 3 by an operation like a pan. In these cases, since the temperature sensor 41 does not come into contact with the bottom of the cooking vessel 13, the pressing load detected by the load cell 5 becomes small. If it is determined that the detected value is decreasing, the control process proceeds to S32. In the process of S32, the combustion control unit 70 first switches the heating power of the gas burner 2 to the minimum. Next, the motor drive unit 73 drives the motor 61 to raise the temperature sensor 41 to 4 mm above the placement surface 31 of Gotoku 3, and waits at that position.

  In the process of S33 following the process of S32, it is determined whether or not the detected value has increased. At this time, the determination unit 72 determines whether or not the pressing load on the cooking container 13 of the temperature sensor 41 is increased based on the result detected by the load cell 5. Here, it is assumed that the detection value increases, for example, that the temporarily removed cooking container 13 is placed on Gotoku 3 again. In this case, the temperature sensor 41 comes into contact with the bottom of the cooking container 13 again, and the temperature sensor 41 is pushed down by the cooking container 13, so that the pressing load detected by the load cell 5 increases. If it is determined that there is no decrease in the detected value in the process of S31 described above, the control process proceeds to S33.

  And when it determines with the detection value increasing by the process of S33, a control process progresses to S34 and the combustion control part 70 of the gas burner 2 is returned so that the thermal power of the gas burner 2 may be returned to the state before switching. Control combustion. In the process of S35 following the process of S34, it is determined whether or not the safety function is ON. At this time, the determination unit 72 determines whether the safety function of the gas stove 1 is operating. If it is determined in the above-described process of S33 that the detected value has not increased, the control process proceeds to S35.

  If it is determined in S35 that the safety function is operating, the control process returns to S27 described above. On the other hand, if it is determined that the safety function is not activated, the control process proceeds to S36, and it is determined whether or not the cooking oil overheat prevention function is ON.

  If it is determined in step S36 that the cooking oil overheat prevention function is activated, the control process proceeds to the above-described step S13, while the cooking oil overheat prevention function is not activated. The control process proceeds to S37. In the process of S37, the determination unit 72 determines whether the combustion time of the gas burner 2 has passed 30 minutes based on the information of the timer provided in the gas stove 1. If it is determined that the combustion time has not passed 30 minutes, the control process returns to S31 described above. On the other hand, if it is determined that the combustion time has passed 30 minutes, the control process proceeds to S13 described above. Then, when the process of S13 is completed, a series of control processes are ended. At this time, the temperature sensor 41 is lowered by the elevating means 6 and returns to a position below the virtues 3.

  Hereinafter, a control process related to a normal stop of the gas stove 1 will be described with reference to FIG. For example, when it is desired to extinguish the gas stove 1, the user operates the fire extinguishing button (see S41). In the process of S42 following the process of S41, the control unit 7 gives each instruction in the order of micro switch OFF, safety valve OFF, mode display lamp OFF, and timer display OFF.

  In the process of S43 following the process of S42, the determination unit 72 determines whether the thermoelectromotive force of the thermocouple is less than 2.5 mV. When it is determined that the thermoelectromotive force is not less than 2.5 mV, the control process proceeds to S44, and it is determined whether 60 seconds have elapsed since the process of S42. At this time, the determination unit 72 performs determination based on information transmitted from the timer.

  If it is determined that 60 seconds have not elapsed, the control process returns to S43. On the other hand, when it is determined that 60 seconds have elapsed, the control process proceeds to S45, and in the process of S45, the control unit 7 displays the error message on the display unit 81 to notify the user, The electromagnetic valve 26 is turned off. Then, when the process of S45 is finished, the control process is finished.

  If it is determined in the process of S43 described above that the thermoelectromotive force of the thermocouple is less than 2.5 mV, the control process proceeds to S46. In the process of S46, the determination unit 72 determines whether or not all the stove and grill are stopped. And when it determines with all the stoves and a grill not stopping, control processing returns to S43. On the other hand, if it is determined that all the stoves and grills are stopped, the control process proceeds to S47, where the control unit 7 instructs the substrate power supply OFF. When the processing of S47 is finished, a series of control processing is finished. And with the completion | finish of control processing, the temperature sensor 41 is lowered | hung by the raising / lowering means 6, and returns to the position below 5 morals.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed. For example, in the above-described embodiment, the ball screw structure including the motor as the lifting means has been described. However, a stepping motor, a structure having a rack and a pinion, an actuator, or the like is also applied.

1 Gas stove 2 Gas burner 3 Gotoku 4 Thermal head 5 Load cell (Pressure load detection means)
6 Lifting means 7 Control section (control means)
8 Operation part 11 Top plate 13 Cooking container 21 Inner cylinder 22 Outer cylinder 23 Gas flow path 24 Flame outlet 31 Mounting surface 32 Claw part 41 Temperature sensor (temperature detection means)
43 Support rod 61 Motor 62 Ball screw 63 Ball screw nut 64 Encoder 65 Lifting rod 70 Combustion control unit 71 Position detection unit 72 Determination unit 73 Motor drive unit 74 Press load change unit (change means)
75 Display unit 81 Display unit 82 Operation button unit 83 Setting unit

Claims (10)

A gas stove having a gas burner and five virtues for placing a cooking vessel around the upper portion of the gas burner,
Temperature detecting means for detecting the temperature in contact with the bottom of the cooking container;
Lifting means for holding the temperature detection means and moving up and down in the vertical direction;
A pressing load detecting means for detecting a pressing load on the cooking container of the temperature detecting means;
Control means for controlling the gas stove;
With
The gas stove according to claim 1, wherein the control means controls raising and lowering of the elevating means based on the pressing load detected by the pressing load detecting means.   The control means controls the raising and lowering means to be raised until the detected value of the pressing load detected by the pressing load detecting means becomes a set value of the pressing load to the cooking container of the temperature detecting means. The gas stove according to claim 1 characterized by things.   Before the detected value of the pressing load detected by the pressing load detecting means reaches the set value of the pressing load to the cooking container of the temperature detecting means, the temperature detecting means reaches a predetermined position above the five virtues. 3. The gas stove according to claim 2, wherein the control unit performs control so as to stop the lifting of the elevating unit.   The gas stove according to any one of claims 1 to 3, further comprising changing means for changing a set value of a pressing load applied to the cooking container by the temperature detecting means.   The gas stove according to any one of claims 1 to 4, further comprising display means for displaying a detected value of the pressing load detected by the pressing load detection means.   When the cooking container is removed from the virtues after the temperature detecting means abuts on the bottom of the cooking container, the control means causes the temperature detecting means to reach a predetermined position above the virtues. The gas stove according to any one of claims 1 to 5, wherein the raising and lowering of the elevating means is controlled.   In a state where the cooking container is not placed on the five virtues, the control means controls the raising and lowering of the raising and lowering means so that the temperature detecting means is located below the five virtues. The gas stove according to any one of claims 1 to 5. The elevating means has a motor and an elevating member that can be moved up and down by driving the motor,
The gas stove according to any one of claims 1 to 7, wherein the control means controls driving of the motor.   The gas stove according to claim 8, wherein the motor is provided with an encoder.   The gas stove according to any one of claims 1 to 9, wherein the pressing load detection means is a load cell arranged between the elevating means and the temperature detection means.

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