JP6005080B2 - Thermal power control device - Google Patents

Description

  The present invention relates to a thermal power adjustment device that can be pushed in the front-rear direction and includes an operation knob that performs a point-extinguishing operation and a thermal power adjustment operation.

  As a thermal power control apparatus as described above, when incorporated in a gas stove and provided with a plurality of gas burners, it is provided for each gas burner. The operation knob is provided on the front surface of the gas stove, and in the fire extinguishing state, the front end face of the operation knob and the front surface of the gas stove are located at substantially the same position in the front-rear direction. When the operation knob is pushed to the ignition position from that state and released, the operation knob protrudes from the front surface of the gas stove to the heating power adjustment position located in front.

  By pushing the operation knob to the ignition position, the motor, which is an actuator incorporated in the thermal power control device, operates to open the closed electromagnetic safety valve and start supplying gas at the flow rate required for ignition of the gas burner. To do. And when spark discharge is generated in the vicinity of the gas burner and the ignition of the gas burner is completed, the motor is further operated to cancel the state where the electromagnetic safety valve is forcibly opened, until the state in which the thermal power can be adjusted is reached. This process is performed automatically.

  Thereafter, when the operation knob is rotated, the motor is activated to increase or decrease the gas flow rate. When cooking is finished, the operation knob is pushed again to stop the gas supply and extinguish the gas burner. (For example, refer to Patent Document 1).

JP 2006-308228 A (FIG. 3)

  In the above-described conventional thermal power adjustment mechanism, since the fire extinguishing and the thermal power adjustment are both performed by operating the motor, the operation knob and the thermal power adjustment device are not mechanically connected. Even if the knob is rotated and the thermal power adjustment operation is performed, the microcomputer that controls the operation of the motor can be controlled not to accept the thermal power adjustment operation. However, since all the operations are performed by a motor, power consumption increases, and particularly in a gas stove using a dry battery as a power source, the life of the dry battery is shortened.

  In order to eliminate such a problem, a configuration is conceivable in which the opening operation of the electromagnetic safety valve at the time of the ignition operation with a large amount of power consumption is performed manually, and only the subsequent heating power adjustment is performed by the motor. However, if such a configuration is adopted, the microcomputer controlling the operation of the motor cannot determine that the ignition operation has been completed and the operation knob has moved to the thermal power adjustment position, so the operation knob is pushed in for ignition. If the control knob rotates, the microcomputer determines that the heating power adjustment operation has been performed, and the gas supply amount to the gas burner is increased or decreased, which may lead to problems such as poor ignition, explosion, or flame overflow. is there.

  Therefore, in view of the above-described problems, the present invention provides a thermal power control device that can normally ignite the gas supply amount without changing even when the operation knob is rotated when the electromagnetic safety valve is manually opened. The task is to do.

In order to solve the above problems, a thermal power control apparatus according to the present invention is a gas appliance provided with a gas burner, and includes a thermal power control device having an operation knob for performing point-extinguishing and thermal power control of the gas burner of the gas appliance. Attach the knob so that it is exposed to the outside of the gas appliance, and push the operation knob to the ignition position, the electromagnetic safety valve is opened by the pushing force, and the gas burner ignites and operates with the operation knob pushed to the ignition position. When the pushing force is released from the ignition position, the operation knob returns to the heating power adjustment position set on the near side, the operation knob protrudes from the gas appliance, and the operation knob is rotated to detect the amount of rotation. In the thermal power adjustment device in which the thermal power of the gas burner is adjusted by operating the actuator that is detected and Work knob provided push-in position detection means for detecting that it has been pushed to the ignition position, the push-in position detecting means, operation knob pushing force to the operation knob acts continuously is pushed to the ignition position While detecting the state, even if the operation knob is rotated, the thermal power adjustment by the rotation is ignored.

  According to the above configuration, since the push-in position detecting means can detect that the operation knob is pushed down to the ignition position, even if the operation knob is rotated while the operation knob is pushed down to the ignition position, You can ignore the firepower adjustment by movement.

  As is apparent from the above description, in the state where the operation knob is pushed to the ignition position, the present invention ignores the adjustment of the thermal power due to the rotation even if the operation knob is inadvertently rotated. There is no change in firepower, and there is no risk of poor ignition, explosion, or flame overflow.

The perspective view seen from the front of the gas stove to which the thermal-power control apparatus of this invention is applied The figure which shows the piping state in a gas stove Perspective view of thermal power control device Disassembled perspective view of thermal power control device V arrow view showing the operating state of the micro switch which is the pushing position detecting means Flow chart showing details of control during ignition operation

  Referring to FIG. 1, reference numeral 1 denotes a gas stove to which a thermal power control apparatus according to the present invention is applied. A top plate 11 is provided on the upper surface of the gas stove 1, and the top plate 11 is provided with three gas burners 11a, 11b, and 11c. On the other hand, the front panel 12 of the gas stove 1 is provided with thermal power control devices 13a, 13b, and 13c for performing point-extinguishing operations and thermal power control operations of the gas burners 11a, 11b, and 11c. In addition, a grill box 14 is provided in the approximate center of the front panel 12, and an upper fire burner 14 a and a lower fire burner 14 b are installed in the grill box 14. Then, the fire extinguishing and the thermal power adjustment of the upper fire burner 14a and the lower fire burner 14b are performed by the thermal power adjusting device 15.

  Referring to FIG. 2, in the present embodiment, the gas supply lines are branched into four in parallel, and thermal power control devices 13a, 13b, 13c, 15 are provided in the branched supply lines. ing. The thermal power control device 13a will be described as an example. The thermal power control device 13a includes an on-off valve unit 2 for performing point extinguishing and a flow rate control unit 3 for performing thermal power control.

  In the on-off valve portion 2, a main valve 21a that is opened by a manual operation and a valve body 22a of an electromagnetic safety valve are provided in series. On the other hand, a motor 31 is connected to the flow rate adjustment unit 3 as an actuator, and the flow rate is increased or decreased by driving the motor 31. Although both the thermal power control devices 13b and 13c have the same structure as the thermal power control device 13a, the thermal power control device 15 has the same structure as the on-off valve unit 2, but the structure of the flow rate control unit 3 is different from the other.

  The flow rate control unit 3 of the thermal power control device 15 is branched into two parallel systems, each of which is provided with on / off valves 15a and 15b that open and close by electromagnetic force, and an orifice 16 that bypasses both the on / off valves 15a and 15b. It has been. Therefore, for example, when the on-off valve 15a is opened, the heating power of the upper fire burner 14a becomes high fire, and when the on-off valve 15a is closed, the gas passing through the orifice 16 makes low fire.

  With reference to FIG. 3 and FIG. 4, the structure of the thermal power control device 13a will be described by taking the thermal power control device 13a as an example. Reference numeral 41 denotes an operation knob which is pushed in when the point is extinguished, and is rotated while holding the outer peripheral surface when adjusting the heating power. An inner member 42 that moves forward and backward together with the operation knob 41 and rotates is connected to the inner side of the operation knob 41, and the inner member 42 is movable in the front-rear direction with respect to the rotation member 44. Is engaged. A coil spring 43 is contracted between the inner member 42 and the rotating member 44, and the operation knob 41 is always urged forward through the inner member 42.

  The rotating member 44 is loosely fitted to a guide shaft 48 that engages with a bracket 47 made of sheet metal, and can rotate about the guide shaft 48. The guide shaft 48 is provided with an engaging claw for engaging the rotation member 44 so as not to move forward, and the rotation member 44 is pressed against the bracket 47 by the reaction of the coil spring 43. The member 44 can only rotate without moving in the front-rear direction. Since the rotation member 44 is engaged with the inner member 42, when the operation knob 41 is rotated, the rotation member 44 is rotated via the inner member 42.

  A gear 44a is formed on the outer peripheral surface of the rear end portion of the rotating member 44, and a pinion 45 is engaged with the gear 44a. The pinion 45 is fitted on a shaft 46a of a rotary encoder 46 that is a rotation sensor. Therefore, when the rotation member 44 rotates, the shaft 46a of the rotary encoder 46 rotates. An electrical switch is provided in the rotary encoder 46, and when the shaft 46a rotates, the switch repeats on / off every predetermined angle, so that a pulse signal is output every time the shaft 46a rotates by a predetermined angle. Is. The motor 31 operates in response to the pulse signal, and a built-in needle valve (not shown) moves back and forth to increase or decrease the opening, thereby adjusting the gas flow rate.

  A guide member 5 is attached to the rear of the bracket 47. The guide member 5 has a function of guiding the slider 62 and the regulating member 8 which are two members so as to be movable in the front-rear direction. On the left side as viewed from the front, a micro switch 51 having two contacts that are turned on and off depending on the position of the regulating member 8 is attached. The regulating member 8 is provided with a horizontally extending dog portion 82. When the regulating member 8 moves rearward, the dog portion 82 pushes down the plunger portion 51a of the microswitch 51, and two contact points SW1, described later. SW2 is turned on sequentially.

  On the right side surface of the guide member 5, a window hole 52 is formed through which an engaging claw 81 formed on the regulating member 8 projects. Similarly, a lock plate 7 is attached to the right side surface so as to be swingable in the vertical direction. A lock portion 72 is formed on the lock plate 7. When the lock plate 7 swings upward and overlaps the window hole 52, the engagement claw 81 of the restriction member 8 comes into contact with the lock portion 72, thereby restricting the restriction. The movement of the regulating member 8 is locked so that the member 8 cannot move further forward. In the present embodiment, a rod unit is configured by the regulating member 8 and a rod 21 described later.

  The slider 62 is provided with an arm 61 protruding forward, and this arm is rotatably engaged with the inner member 42. Therefore, when the operation knob 41 is pushed in, the slider 62 moves through the arm 61 to the back side in the guide member 5. When the operation knob 41 is returned to the front by the biasing force of the coil spring 43, the slider 62 is also moved forward through the arm 61.

  A heart cam 6 is integrally provided on the slider 62, and a spring bar 71 into which a tip 71 a is inserted into the cam groove of the heart cam 6 is held by the guide member 5 so as to be swingable. Since the tip 71a of the spring bar 71 is inserted into the window hole 73 of the lock plate 7, when the tip 71a swings and the vertical position is displaced, the lock plate 7 is moved in the vertical direction in accordance with the displacement. Swing.

  A rod 21 projects forward from the on-off valve portion 2, and a coil spring 82 is contracted between the on-off valve portion 2 and the regulating member 8. Therefore, the regulating member 8 is always urged forward by the coil spring 82. However, when the slider 62 moves backward by pushing the operation knob 41, if the regulating member 8 is pushed by the slider 62, the regulating member 8 8 also moves backward to push the rod 21 backward. Further, when the slider 62 moves forward, the regulating member 8 also moves forward due to the urging force of the coil spring 82. At that time, the lock plate 7 swings upward and the lock portion 72 overlaps the window hole 52. As described above, the engaging claw 81 comes into contact with the lock portion 72 and the movement of the restricting member 8 is restricted.

  Referring to FIG. 5, microswitch 51 is fixed so as to be held by three claws 5 a formed on the side surface of guide member 5. The microswitch 51 is positioned by inserting the two protrusions 5 b through the mounting holes formed in the microswitch 51. Therefore, no screws are used when attaching the microswitch 51 to the guide member 5.

  In the state where the operation knob 41 is in the fire extinguishing position, the dog portion 82 does not push down the plunger portion 51a, so that the contacts SW1 and SW2 built in the microswitch 51 are both turned off (FIG. 5A). ). When the operation knob 41 is pushed from this state, the regulating member 8 moves rearward, that is, to the left in FIG. 5, so that the dog portion 82 pushes down the plunger portion 51a as shown in FIG. Turn on SW1. At this time, the second contact SW2 remains off.

  When the operation knob 41 is further pushed to the ignition position, as shown in (c), the dog portion 82 further pushes the plunger portion 51a and turns on the contact SW2.

  When the contact SW1 is turned on, energization is started in a control unit (not shown). The gas stove 1 according to the present embodiment has a built-in dry battery as a power source for operation, and when all the operation knobs 41 are in the fire extinguishing position, it is not necessary to operate the control unit, and therefore energization to the control unit is stopped. doing. When any one of the operation knobs 41 is pushed to ignite, before reaching the ignition position, as shown in FIG. 5B, the contact SW1 is turned on to start energization of the control unit. When the contact SW2 is turned on, the control unit detects that the operation knob 41 has been pushed to the ignition position. In addition, when one of the operation knobs 41 is already in the heating power adjustment position and another operation knob 41 is pushed in while the control unit is energized and a new contact SW1 is turned on, the control unit already has Since it is energized, the control unit detects that the contact SW1 is newly turned on.

  Details of such an ignition operation will be described with reference to FIG. The flow shown in FIG. 6 shows a flow when a new ignition operation is performed for a gas burner in a fire extinguisher state while the control unit is already energized.

  The controller in the energized state always monitors that the contact SW1 is turned on (S1). When the operation knob 41 is pushed in from the fire extinguishing position and the contact SW1 is turned on, energization is immediately started to the exciting coil of the electromagnet built in the electromagnetic safety valve (SV) (S2). If the rod 21 is pushed in that state, the valve body of the electromagnetic safety valve is attracted to the electromagnet, and the valve body is held in the open state.

  As shown in FIG. 5 above, when the contact SW1 is turned on, the contact SW2 should be turned on, but when the contact SW2 is not turned on even after a predetermined time has passed (S3, S5). Then, an error is notified by a warning sound or a lamp (S4), and further ignition operation is stopped.

  On the other hand, when the contact SW2 is turned on within a predetermined time, it is determined that the operation knob 41 has been pushed to the ignition position, the igniter is operated (S6), and the gas burner is ignited. When the gas burner is ignited, the control unit detects that the ignition of the gas burner is completed by the thermoelectromotive force from the thermocouple installed in the vicinity of the gas burner (S7).

  In addition to the completion of ignition being detected by the control unit, the user performing the ignition operation visually confirms and when the user determines that the ignition has occurred, the pushing force applied to the operation knob 41 is released. Then, the operation knob 41 protrudes forward, the restricting member 8 also returns forward, and the contact SW2 is turned off (S8). However, since the engaging claw 81 of the restricting member 8 contacts the lock portion 72 and the restricting member 8 stops halfway and is held in the state shown in FIG. 5B, the contact SW1 remains on. Will continue.

  Until the contact SW2 is turned off, even if the operation knob 41 is rotated, the signal from the rotary encoder 46 is programmed to be ignored, so that the ignition operation is completed and the contact SW2 is turned off. Until then, even if the operation knob 41 is rotated, the thermal power does not change as the thermal power set in advance for ignition. As described above, since the gas supply amount to the gas burner at the time of ignition does not change at a preset flow rate, problems such as an ignition failure due to a decrease in the flow rate, an explosion due to an increase in the flow rate, and a flame overflow do not occur. Then, when the contact SW2 is turned off, a heating power adjustment operation by a signal from the rotary encoder 46 is accepted from that time (S9).

  By the way, in the said embodiment, a rod unit is comprised with two members, the restriction member 8 and the rod 21, as mentioned above, and it engages with the restriction member 8 interposed between the slider 62 and the rod 21. Although 81 is provided, the restriction member 8 may be omitted, and the rod unit may be configured by only the rod 21. In that case, the engaging claws and the dog portion may be provided directly on the rod.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Gas cooker 2 On-off valve part 3 Flow volume adjustment part 5 Guide member 6 Heart cam 7 Lock plate 8 Control member 13a Thermal power control apparatus 13b Thermal power control apparatus 15 Thermal power control apparatus 15a Open / close valve 21 Rod 31 Motor 44a Gear 45 Pinion 46 Rotary encoder 51 Microswitch 51a Plunger part 61 Arm 62 Slider 81 Engaging claw 82 Dog part 82 Coil spring SW1 Contact SW2 Contact

Claims (1)

A gas appliance provided with a gas burner, comprising a thermal power control device having an operation knob for performing point extinction and thermal power adjustment of the gas burner of the gas appliance, and the operation knob is attached so as to be exposed to the outside of the gas appliance. Engaging to the ignition position, the electromagnetic safety valve is opened by the pushing force, and ignition gas burner in a state where pushing the operation knob to the ignition position, when the operation knob releases the pushing force from the state of the ignition position, the front side The operation knob returns to the thermal power adjustment position set to, the operation knob protrudes from the gas appliance, and when the operation knob is rotated, the sensor detects the amount of rotation and operates the built-in actuator to operate the thermal power of the gas burner. In a thermal power control device in which is adjusted, it is detected that the operation knob has been pushed to the ignition position. The push-in position detecting means is provided, while the push-in position detecting means, the operation knob pushing force operating knob acts continuously has detected that the state of being pushed to the ignition position, the operation knob A gas appliance characterized by ignoring the adjustment of the thermal power by the rotation even if the is rotated.

Images