JP6664949B2 - Gas appliances - Google Patents

Description

  The present invention relates to a gas appliance provided with a push-type point fire button.

  Some gas appliances such as gas stoves are provided with a fire extinguishing button for performing a fire extinguishing of a gas burner. For example, in the gas stove provided with a point fire extinguishing button on the front panel, when the point fire extinguishing button is pushed into the appliance from the fire extinguishing position where there is no step with respect to the front panel, the supply of gas to the gas burner is started. The igniter operates to ignite the gas burner. After igniting the gas burner, release the fire button and the fire button will protrude forward due to the urging force. The heat power is increased or decreased by performing a heat power adjustment operation in that state, and when extinguishing the gas burner, the point fire extinguishing button is pressed again to return to the first fire extinguishing position (for example, see Patent Document 1).

  In a gas appliance that performs the above-described operations, when the point fire extinguishing button is pushed in from the fire extinguishing position to ignite the gas burner, the main valve located at the back of the point fire extinguishing button is attached with the force that pushes the point fire extinguishing button. The operation of opening the valve against the force and further pushing the point fire extinguishing button to move the valve body of the electromagnetic safety valve against the biasing force and pushing the valve body against the electromagnet for holding and holding is performed. Done.

  When the pressing force on the fire extinguishing button is released after the ignition of the gas burner is completed, the fire extinguishing button is pushed out to the heating power adjustment position as described above, but the valve element of the electromagnetic safety valve is attracted and held by the electromagnet and The valve is kept open.

JP 2015-1111029 A (FIG. 7)

  In the above-mentioned conventional type, when the point fire extinguishing button is pushed in from the fire extinguishing position for ignition, the main valve is first opened, but at this time, the main valve is opened against the urging force, so that the fire extinguishing is performed. Pushing the button becomes heavy. For this reason, the person performing the ignition operation feels that pressing the point fire extinguishing button to the position where the valve element of the electromagnetic safety valve is pressed against the electromagnet by pressing the point fire extinguishing button heavily, and pushing the point fire extinguishing button. It may stop at that position and release the pushing force.

  If the pressing of the fire extinguishing button is stopped before the valve body of the electromagnetic safety valve is pressed against the electromagnet, the valve body of the electromagnetic safety valve is not held open by the electromagnet, so that the gas burner is not ignited. In this case, since the person performing the ignition operation has an illusion that the fire extinguishing button has been pushed to the ignition position, there is a tendency that the cause of the gas burner not igniting is a failure of the gas appliance.

  In view of the above problems, the present invention provides a gas appliance that does not give the illusion that the point fire extinguishing button has been pushed to the ignition position before the point fire extinguishing button is pushed to the ignition position when the point fire extinguishing button is pushed to ignite the gas burner. The task is to provide.

In order to solve the above-mentioned problems, a gas appliance according to the present invention is provided with an electromagnetic safety valve and a main valve in the middle of a gas supply path to a gas burner, and pushing a point fire extinguishing button backward to operate the main valve. In the gas appliance for opening the valve and pressing the valve body of the electromagnetic safety valve against the electromagnet for holding the valve open to start supplying gas to the gas burner and operating the ignition device, the pushing force against the point fire extinguishing button is reduced. more with point extinguishing button displaced Thus the main valve to move from the fire extinguishing position to the rear of the ignition position is to place the main valve to open, the electric actuator that operates by pushed the point extinguishing button provided, this The valve body of the electromagnetic safety valve is pressed against the electromagnet by a driving force generated by an electric actuator.

  The main valve is opened with the pushing force on the fire extinguishing button, but the valve element of the electromagnetic safety valve is opened with an electric actuator, so that the resistance to the pushing of the fire extinguishing button during ignition does not change in two stages. It is possible to avoid an illusion that the button has been pressed in the middle of pressing the button.

  Specifically, ignition position detection means for detecting that the point fire extinguishing button has been pushed to the ignition position is provided, and when the ignition position detection means detects that the push button has been pushed to the ignition position, the electric actuator is activated. The electromagnetic safety valve is actuated to press the valve body against the electromagnet.

  A push-push mechanism is provided for holding the point fire extinguishing button at three positions: a fire extinguishing position, the ignition position, and a thermal power adjustment position set in front of the fire extinguishing position beyond the ignition position. Second detection means is provided which operates at a predetermined position after the fire extinguishing button has passed through the fire extinguishing position while the point fire extinguishing button is moving from the ignition position to the heating power adjustment position. When the second detection means is operated in a state where it has not been detected that the button has been pushed to the position, the ignition device is actuated. It is desirable to ignite the gas burner even when the gas is released.

  By the way, the valve body of the electromagnetic safety valve is pressed against the electromagnet by the electric actuator, and the electric actuator is operated in the reverse direction while the valve body is attracted and held by the electromagnet. May be increased or decreased to adjust the thermal power of the gas burner.

  As apparent from the above description, according to the present invention, the resistance to pressing of the fire extinguishing button at the time of ignition does not change in two stages. Can be reliably ignited.

The perspective view seen from the front of the gas stove to which the thermal power control device of the present invention is applied. Diagram showing the piping condition inside the gas stove Perspective view of thermal power control device Exploded perspective view of a thermal power control device Diagram showing the shape of the cam groove of the heart cam Diagram showing the position of the heart cam and the state of the spring bar Sectional view of thermal power control device

  Referring to FIG. 1, reference numeral 1 denotes a gas stove as an example of the gas appliance according to the present invention. A top plate 11 is provided on an 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, 13c for performing a point fire extinguishing operation and a thermal power adjusting operation of each of the gas burners 11a, 11b, 11c. Further, a grill storage 14 is provided substantially at the center of the front panel 12, and an upper fire burner 14a and a lower fire burner 14b are installed in the grill storage 14. The fire extinguishing of the upper fire burner 14a and the lower fire burner 14b and the heat power adjustment are performed by the heat power adjusting device 15.

  Referring to FIG. 2, in the present embodiment, the gas supply pipelines are branched in parallel into four, and each of the branched supply pipelines is provided with thermal power control devices 13 a, 13 b, 13 c, and 15. Have been. Taking the thermal power control device 13a as an example, the thermal power control device 13a includes a main valve 2 and a flow rate control unit 3 having a thermal power control function and an electromagnetic safety valve function. Note that the flow rate adjusting section 3 is operated by one motor 31.

  The flow 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 which are opened and closed by electromagnetic force, and an orifice 16 which bypasses both on-off valves 15a and 15b. Have been. Therefore, for example, when the on-off valve 15a is opened, the heating power of the upper fire burner 14a becomes strong, and when the on-off valve 15a is closed, the gas passing through the orifice 16 makes it low.

  With reference to FIG. 3 and FIG. 4, the structure of the thermal power control device 13a will be described using the thermal power control device 13a as an example. Reference numeral 41 denotes an operation knob which functions as a fire extinguishing button. The operation knob is pushed in when extinguishing a fire, and is rotated while holding the outer peripheral surface when adjusting the heating power. An inner member 42 that moves forward and backward and rotates integrally with the operation knob 41 is connected to the inside 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 constantly urged toward the front via the inner member 42.

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

  A gear 44a is formed on the outer peripheral surface of the rear end of the rotating member 44, and a pinion 45 meshes with the gear 44a. The pinion 45 is fitted on a shaft 46a of a rotary encoder 46 serving as a rotation sensor. Therefore, when the rotating member 44 rotates, the shaft 46a of the rotary encoder 46 rotates. An electric switch is provided in the rotary encoder 46. When the shaft 46a rotates, the switch repeatedly turns on and off at predetermined angles. Therefore, when the shaft 46a rotates, a number of pulse signals corresponding to the rotation angle are provided. Is output. Then, the motor 31 operates according to the number of pulses, and the flow rate of gas supplied to the gas burner is adjusted by a mechanism described later.

  The guide member 5 is attached to the rear of the bracket 47 (in the pushing direction). The guide member 5 has a function of guiding the slider 62 and the regulating member 8, which are two members, movably in the front-rear direction. On the left side when viewed from the front, a micro switch 51 having two built-in contacts that are turned on and off according to the position of the regulating member 8 and a second micro switch (not shown) are mounted. On the right side surface, a window hole 52 from which an engaging claw 81 formed in the regulating member 8 projects is formed. Further, a lock plate 7 is attached to the right side surface so as to be vertically swingable. A lock portion 72 is formed on the lock plate 7, and when the lock plate 7 swings upward and overlaps the window hole 52, the engaging claw 81 of the restricting member 8 abuts on the lock portion 72 to restrict the lock portion 72. The movement of the regulating member 8 is locked so that the member 8 cannot move further in the forward direction.

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

  A heart cam 6 is provided integrally with the slider 62, and a spring bar 71 into which a tip portion 71 a is inserted is inserted into a cam groove of the heart cam 6 and is swingably held by the guide member 5. 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 displaces in the vertical direction, the lock plate 7 moves up and down in accordance with the displacement. Rocks in the direction.

  A rod 21 projects forward from the main valve 21a, and a coil spring 82 is contracted between the main valve 21a and the regulating member 8. Therefore, the regulating member 8 is always urged toward the front by the coil spring 82. However, when the slider 62 is moved rearward by pushing the operation knob 41, the regulating member 8 is pushed when the slider 62 is pushed. The member 8 also moves rearward and pushes the rod 21 rearward. When the slider 62 moves in the forward direction, the regulating member 8 also moves in the forward direction by the urging force of the coil spring 82. At this time, the lock plate 7 swings upward, and the lock portion 72 moves into the window hole 52. When they overlap, the engaging claw 81 comes into contact with the lock portion 72 to restrict the movement of the regulating member 8 in the forward direction, and the main valve 21a is held open as described above.

  Referring to FIGS. 5 and 6, the heart cam 6 is formed with a substantially heart-shaped cam groove. When the operation knob 41 is in the fire extinguishing position, the distal end portion 71a of the spring bar 71 is at the position a shown in FIG. When the operation knob 41 is pushed to the ignition position at the time of ignition from that position, the heart cam 6 moves rearward, and at that time, the tip portion 71a moves from a to b. At the time of the movement, the tip portion 71a climbs over the step D1, so that after the ignition is completed, the pushing force on the operation knob 41 is released, and the heart cam 6 together with the slider 62 is moved by the urging force of the coil spring 43 to the thermal power adjustment position which is the foremost end. At this time, the leading end portion 71a moves to c over the step D2 without returning to a.

  When the fire is extinguished, the operation knob 41 is pushed again, and at that time, the tip 71a moves from c to d. It should be noted that the vehicle climbs over the step D3 just before reaching d. When the pushing force on the operation knob 41 is released from that state, the slider 62 returns to the front direction by the urging force of the coil spring 43, and the distal end portion 71a returns to a corresponding to the fire extinguishing position again beyond the step D4.

  Referring to FIG. 7, in the fire extinguishing state shown in (a), operation knob 41 is in a state where there is no step with front panel 12. At this time, the regulating member 8 is pressed against the slider 62 from behind, and the front end of the rod 21 is separated from the regulating member 8. For this reason, the main valve 21a attached substantially at the center of the rod 21 is closed, and the valve element 22a of the electromagnetic safety valve is also closed. Since the main valve 21a and the valve element 22a of the electromagnetic safety valve are both closed, no gas is supplied to the gas burner.

  When the operation knob 41 is pushed to the ignition position as shown in (b), the slider 62 is pushed by the slider 62 and the regulating member 8 also moves backward. At that time, the rod 21 is also pushed rearward, so that the main valve 21a is opened. When the micro switch 51 is turned on to detect that the operation knob 41 has been pushed to the ignition position, the motor 31 is operated to move the heating power adjustment rod 33 rightward in the drawing. A rotating body 32 is attached to the rotating shaft of the motor 31, and a screw portion 33 a formed on the heating power adjusting rod 33 is screwed to the rotating body 32. Therefore, when the rotating body 32 rotates, the heating power adjusting rod 33 moves in a state where it is prevented from rotating.

  The heating power adjusting portion 33b formed at the tip of the heating power adjusting rod 33 moves the sliding member 34 rightward in the figure in a state of being fitted to the cylindrical sliding member 34, so that the valve body 35a of the electromagnetic safety valve also slides. It is pushed by the member 34 and moves rightward. The valve body 35a is pressed against the electromagnet 35 of the electromagnetic safety valve. When the micro switch 51 is turned on, the electromagnet 35 is energized and excited, so the valve body 35a is opened by the electromagnet 35. Adsorbed and held in the state.

  When the pressing force on the operation knob 41 is released from that state, the operation knob 41 moves forward and protrudes as shown in FIG. At this time, the slider 62 also moves in the forward direction, but the lock plate 7 swings upward to regulate the movement of the regulating member 8 in the forward direction. In this state, the rod 21 is in contact with the regulating member 8, and the main valve 21a is held in an open state. Further, the valve body 35a of the electromagnetic safety valve is also suction-held in an open state.

  In this state, when the operation knob 41 is rotated to perform the heating power adjustment operation, the amount of rotation is detected by the rotary encoder 46, and the motor 31 is operated to slide with the heating power adjustment part 33 b at the tip of the heating power adjustment rod 33. By increasing or decreasing the distance between the member 34 and the hollow portion, the flow rate of gas supplied to the gas burner through the hollow portion is increased or decreased.

  Then, when extinguishing the fire from the heating power adjustment position, the operation knob 41 is pushed in, and the operation returns to the initial fire extinguishing position a via c to d shown in FIG. At that time, the state shown in FIG. 7C changes to the state shown in FIG. When the engagement between the lock plate 7 and the regulating member 8 is released during the change, the rod 21 is moved forward by the urging force of the coil spring 82, and the main valve 21a is closed.

  By the way, as described above, when the operation knob 41 is pushed from the fire extinguishing position to the ignition position, the micro switch 51 is turned on to detect that the operation knob 41 has been pushed to the ignition position. As described above, when the pushing force on the operation knob 41 is released just before the ignition position without being completely pushed to the ignition position, the operation knob 41 jumps out to the heating power adjustment position without the micro switch 51 being turned on. In the above-described configuration, in such a case, the micro switch 51 is not turned on, so that the gas burner is not ignited. In order to eliminate the situation in which the ignition does not occur as inconvenience, the above-described second microswitch (not shown) is provided so as to be turned on at the "second detection position" in FIG. The second detection position was set at a position further away from the fire extinguishing position on the side of the heating power adjustment position. With this configuration, the gas stove can be ignited even if the operation knob 41 is not sufficiently pushed in at the time of ignition.

  If the gas burner is misfired due to boiling over during cooking or the like, the current for adsorbing and holding energized to the electromagnet 35 of the electromagnetic safety valve is shut off, thereby closing the valve body 35a and stopping gas supply to the gas burner. Can be done.

  The present invention is not limited to the above-described embodiment, and various changes may be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Gas stove 2 On-off valve part 3 Flow control part 5 Guide member 6 Heart cam 7 Lock plate 8 Restriction member 12 Front panel 13a Fire power control device 13b Fire power control device 13c Fire power control device 14 Grill storage 15 Fire power control device 21 Rod 21a Main valve 31 Motor 35a Valve element 41 Operation knob 46 Rotary encoder

Claims (4)

An electromagnetic safety valve and a main valve are provided in the middle of the gas supply path to the gas burner, and the point fire extinguishing button is pushed backward to open the main valve and open the valve body of the electromagnetic safety valve. is pressed against the electromagnet for holding and moving, in a gas appliance to operate the ignition device starts the supply of gas to the burner, the more points extinguishing button extinguishing positioned pushing force against the point extinguishing button to the rear of the ignition position with displaced Thus the main valve to positions the main valve to open, provided an electric actuator that operates by pushed the point extinguishing button, the valve body of the electromagnetic safety valve with driving force which the electric actuator is generated Is pressed against the electromagnet.   An ignition position detecting means for detecting that the point fire extinguishing button is pushed to the ignition position is provided. When the ignition position detecting means detects that the push button is pushed to the ignition position, the electric actuator is operated to operate the electromagnetic safety valve. 2. The gas appliance according to claim 1, wherein said valve body is pressed against said electromagnet.   A push-push mechanism for holding the point fire extinguishing button at three positions: a fire extinguishing position, the ignition position, and a thermal power adjustment position set in front of the fire extinguishing position beyond the fire extinguishing position; Second detection means is provided which operates at a predetermined position after the button has passed the fire extinguishing position while the button is moving from the ignition position to the heating power adjustment position, and the ignition position detecting means makes the point fire extinguishing button reach the ignition position. 3. The gas appliance according to claim 2, wherein the ignition device is activated when the second detection unit is activated in a state where the depression is not detected. 4.   The electric actuator presses the valve body of the electromagnetic safety valve against the electromagnet, operates the electric actuator in the opposite direction while holding the valve body by the electromagnet, and increases or decreases the flow rate of gas to the gas burner according to the amount of operation. The gas appliance according to any one of claims 1 to 3, wherein the heat power of the gas burner is adjusted.

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