JP2012184890A - Gas cooking stove device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem specific to a gas cooking stove device with a concentric burner, i.e., the problem that combustion is continued in a burner body of a primary burner of the concentric burner if a backfire is generated on the primary burner in a process where a fire power of the primary burner is throttled and if the primary burner is continuously supplied with a minute amount of gas because gas supply to the primary burner is not stopped completely when the primary burner is extinguished and only a secondary burner of the concentric burner are put in combustion to continue cooking.SOLUTION: A range where the fire power of the primary burner changes from a prescribed small fire state to an extinguished state is regarded as a backfire region for the primary burner. A torque increase point where a rotation torque becomes large immediately before the backfire region is set, and a rapid pass through the backfire region is made taking advantage of a force at the escape of the torque increase point.

Description

  The present invention relates to a gas stove device including an annular parent burner and a child burner located in the center of the parent burner and smaller than the parent burner.

  There is a demand to increase the maximum combustion amount, that is, the maximum heating power, for the gas burner provided in the gas stove device. To increase the maximum thermal power, the burner can be enlarged. However, if the burner is enlarged, the thermal power will not be stabilized when the thermal power is reduced, and the flame will enter the burner body through the burner hole, There is a possibility that a phenomenon of back-fire that continues to burn occurs at this time (see, for example, Patent Document 1).

  In order to solve such a problem, many gas stove devices having two parent-child burners of a relatively large parent burner having a large maximum combustion amount and a child burner smaller than the parent burner have been proposed ( For example, see Patent Document 2).

  In a gas stove apparatus equipped with such a parent-child burner, for example, when cooking boiled food with a small heating power, the heating power of the parent burner is reduced to extinguish the fire, and only the child burner is ignited.

JP 2003-28428 A (paragraph 0005) JP 2006-29727 A (FIG. 1)

  Since the parent burner is a relatively large burner, when the heating power is reduced, the gas ejection speed from the flame hole of the parent burner becomes slow, and when the ejection speed becomes slower than the gas combustion speed, the fire burns back. It becomes easy. If the temperature around the flame hole is not high, even if the flame tries to enter the burner body through the flame hole, the heat is taken away around the flame hole, but it is extinguished. When the surroundings of the flame hole are hot as in the state, the flame is not extinguished and enters the burner main body through the flame hole, so that a flashback phenomenon easily occurs.

  However, even if a backfire occurs just before the burner is extinguished as in the case of the end of cooking, the gas supply itself to the burner stops immediately after that, so no backfire occurs.

  However, as a problem peculiar to gas stove devices equipped with the above-mentioned parent-child burner, when the parent burner is extinguished and only the child burner is burned and cooking is continued, the parent burner is backfired while the heating power of the parent burner is being reduced. If this occurs and the gas supply to the parent burner is not completely stopped and the gas supply continues slightly, combustion will continue in the burner body of the parent burner, which is not desirable.

  Then, this invention makes it a subject to provide the gas stove apparatus which does not produce backfire in a parent burner by the gas stove apparatus provided with the parent-child burner in view of said problem.

  In order to solve the above-described problems, a gas stove device according to the present invention includes a ring-shaped parent burner and a child burner that is located in the center of the parent burner and is smaller than the parent burner, and is a rotary operation type thermal power control knob that performs thermal power control. Gas stove device that turns the burner to a predetermined angle from the fire extinguishing position to ignite both burners, and further turns the heating power adjustment knob beyond the ignition position to extinguish the parent burner and reduce the heating power of the child burner In the range where the heating power adjustment knob is further rotated from the ignition position, the range from the predetermined small fire state where the fire power of the parent burner is changed to the fire extinguishing state where the fire power of the parent burner is changed to the fire extinguishing state. When the thermal power adjustment knob is rotated from the ignition position side toward the flashback area, a torque increase point at which the rotational torque of the thermal power control knob increases immediately before the flashback area. And characterized in that location.

  If the torque increase point is set when the thermal power adjustment knob is rotated from the ignition position side toward the flashback region, the thermal power adjustment knob temporarily stops at this torque increase point. In this state, the thermal power adjustment knob has not yet entered the flashback area. Further, in order to rotate the thermal power adjustment knob, a large torque is applied to the thermal power adjustment knob. However, when the torque increase point is passed, the torque necessary for the rotation decreases. Then, the heating power adjustment knob is vigorously rotated with a large torque applied to the operation knob, and passes through the flashback area.

  In the above configuration, when the thermal power of the parent burner is reduced from the large fire state at the ignition position, the thermal power adjustment knob is prevented from stopping in the flashback region, but the master burner is extinguished in the state of passing through the flashback region. When the thermal power adjustment knob is rotated from the state toward the ignition position, a second torque increasing point where the rotational torque of the thermal power adjustment knob increases immediately before the flashback region may be provided.

  In addition, it can be confirmed that the passage of the flashback region by the increase of the rotational torque is made at the position passing through the flashback region from the torque increase point and the position passing through the flashback region from the second torque increase point. By providing the confirmation torque increase point, it is possible not only to confirm that the vehicle has passed through the flashback region when adjusting the thermal power, but also to prevent the thermal power control knob from being turned too much after passing through the flashback region.

  The mechanism for increasing the rotational torque is not particularly limited. For example, a click mechanism that generates a click feeling when the sphere is fitted into the hole at least at any one of the torque increase point, the second torque increase point, and the confirmation torque increase point. It is conceivable to provide

  When the click mechanism is provided in this way, the click mechanism is provided so that a click feeling is generated even if the thermal power adjustment knob is rotated at a position other than the torque increase point, and the number of spheres that fit into the hole by the click mechanism. The number of spheres that fit in the hole at the torque increase point is increased, and the torque for rotating the thermal operation knob from the torque increase point is larger than the torque for rotating the thermal operation knob from a position other than the torque increase point. It is desirable to make it larger. As described above, if the torque is increased so that the torque at the torque increase point is larger than the torque at other positions, a larger torque is required when passing through the torque increase point. However, since the torque required for rotation decreases at the moment when the torque increase point is passed, after passing the torque increase point, the range of excessive rotation after passing the torque increase point becomes larger than other positions. Thereby, the flashback range can be reliably passed.

  As is clear from the above description, the present invention provides a thermal power adjustment knob vigorously as it is with the torque when passing through the torque increase point by providing the torque increase point in the middle of reducing the thermal power of the parent burner. Is rotated and passes through the flashback area, so that the thermal power adjustment knob is prevented from stopping in the flashback area while the heating power of the parent burner is being reduced.

The figure which shows the structure of one embodiment of this invention Perspective view of parent-child burner Perspective view of gas cock The figure which shows the change of the rotation angle of the thermal adjustment knob and the thermal power of the parent and child burner Exploded view of gas cock Exploded view showing the coupling mechanism between the rotating shaft and the closure Diagram showing details of rotating plate The figure which shows the change of the click feeling by the rotation angle of the rotating plate The figure which shows the relationship between the thermal power change and the generation timing of the click feeling The figure which shows the change of the click feeling by the rotation angle of the rotating plate in a modification.

  With reference to FIG. 1, 1 is an example of the gas stove apparatus by this invention. This stove device 1 is a so-called two-hole stove, and has two gas burners 2 on the top plate, and the heating power adjustment of each gas burner 2 is also performed by rotating a heating power adjustment knob 11 provided on the top plate. Is done by.

  Referring to FIG. 2, each gas burner 2 includes an annular parent burner 21 and a child burner 22 provided so as to be positioned at the center of the parent burner 21. Both burners 21 and 22 are formed with flame holes on the outer periphery. Further, the child burner 22 is set to a small size with a small maximum combustion amount with respect to the parent burner 21. However, although the maximum combustion amount of the child burner 22 is smaller than the maximum combustion amount of the parent burner 21, the minimum combustion amount of the child burner 22 is set to be smaller than the minimum combustion amount of the parent burner 21. The width from the combustion amount to the minimum combustion amount of the child burner 22 is set to be wider than that in the case of a single gas burner.

  With reference to FIG. 3 and FIG. 4, the transition of the thermal power of each burner 21 and 22 with respect to the rotation angle of the thermal power control knob 11 will be described. Reference numeral 3 denotes a gas cock, and the rotation shaft 31 to which the heating power adjustment knob 11 is attached can rotate within a range of about 180 degrees. When the fire extinguishing position where both the burners 21 and 22 are in the fire extinguishing state is set to 0 degree, and the heating power adjustment knob 11 is rotated leftward, the ignition position is set at about 90 degrees. From the fire extinguishing position to this ignition position, both the burners 21 and 22 are sequentially increased from a state where the gas supply amount is zero to an amount corresponding to the maximum combustion amount. That is, when the heating power adjustment knob 11 reaches the ignition position, the gas amount corresponding to the maximum combustion amount is supplied to both the burners 21 and 22. At the ignition position, the micro switch 32 is turned on, and a sparker (not shown) is operated to ignite the parent burner 21. Further, almost simultaneously, the parent burner 21 is ignited and ignited.

  At the ignition position, the thermal power adjustment knob 11 is temporarily locked so that it cannot be rotated further to the left. However, when the hand is released from the thermal power adjustment knob 11, the lock is released and the thermal power adjustment knob 11 can be further rotated to the left. When the thermal power adjustment knob 11 is returned to the right from the ignition position, the thermal power of both burners 21 and 22 decreases, and both the burners 21 and 22 are put into a fire extinguishing state at the fire extinguishing position. On the other hand, when the thermal power adjustment knob 11 is further rotated leftward from the ignition position, first, the thermal power of the parent burner 21 is continuously reduced and reduced, and finally the fire is extinguished. Further, after the master burner 21 is extinguished, when the heating power adjustment knob 11 is further rotated leftward, the heating power of the child burner 22 continuously decreases, and the child burner 22 reaches the minimum combustion state (position indicated by MIN). The thermal power adjustment knob 11 can no longer be rotated to the left.

  When the thermal power adjustment knob 11 is further rotated leftward from the ignition position (90-degree position), the thermal power of the main burner 21 is reduced, and in this embodiment, when the rotational position reaches 120 degrees, The period from the thermal power until the parent burner 21 extinguishes was set as the flashback area.

  In the present invention, when the heating power adjustment knob 11 passes through the flashback area both in the left rotation and in the right rotation, a click feeling is generated in front of the flashback area to temporarily stop the rotation. The thermal power adjustment knob 11 is caused to pass through the flashback area without stopping in the flashback area by rotating the thermal power adjustment knob 11 at once with the torque when passing through the flame.

  A specific configuration will be described with reference to FIGS. The rotating shaft 31 is provided with a disc 41 that rotates together with the rotating shaft 31. Three indentations are formed in the disc 41, and steel balls 42a, 42b, and 42c are set in the indentations, respectively. A spring plate 43 is attached from above the disc 41 so that the steel balls 42a, 42b, and 42c do not fall out of the recesses. The spring plate 43 is provided with three holes 43a, 43b, 43c.

  By the way, the gas cock 3 is of a type that increases or decreases the gas amount to the parent-child burner 2 by rotating a conical closing member 35. As shown in FIG. 6, the rotating shaft 31 is not directly connected to the closing member 35, but is connected via a pin 33 and a connecting member 34. A slit 31a is formed at the lower end of the rotating shaft 31, and a pin 33 fits into the slit 31a. On the other hand, both ends of the pin 33 are fitted in the grooves 34 a of the connecting member 34. Therefore, when the rotation shaft 31 is rotated, the connecting member 34 is rotated. A pair of claws 34 b is formed at the lower end of the connecting member 34, and the claws 34 b are engaged with grooves 35 a formed in the upper part of the closing member 35. Therefore, when the rotation shaft 31 is rotated, the connecting member 34 is rotated as described above, and the closing member 35 is further rotated.

  Since the rotation shaft 31 is not directly connected to the closing member 35 in this way, play occurs between the turning shaft 31 and the closing member 35, and when the turning shaft 31 is turned left and right, the closing member is moved. Although 35 also rotates left and right, hysteresis occurs. On the other hand, the rotating plate 41 also rotates together with the rotating shaft 31. In order to make the rotating phase of the rotating plate 41 coincide with the rotating phase of the closing member 35, the rotating plate 41 is interposed between the rotating shaft 31 and the rotating plate 41. It is necessary to provide play to generate hysteresis.

  Therefore, as shown in FIG. 7, the anti-rotation portion of the D hole 40 formed in the center of the rotating plate 41 is not made straight, and the anti-rotation portion 40a at the left rotation and the anti-rotation portion 40b at the right rotation are formed separately. did. And both the rotation prevention parts 40a and 40b were made to form the angle of 11 degree | times in this Embodiment. As a result, when the rotating shaft 31 is rotated clockwise from a state where the rotating shaft 31 is rotated counterclockwise, the rotating plate 41 rotates with a delay of 11 degrees with respect to the rotating shaft 31.

  The spring plate 43 is provided with three holes 43a, 43b, and 43c. As shown in FIG. 8, when the rotating shaft 31 is rotated leftward from the fire extinguishing position, the steel ball 42c fits into the hole 43b at the ignition position as shown in FIG. ). When the ignition is completed and the rotating shaft 31 is further rotated to the left, a torque is required to escape the steel ball 42c from the hole 43b.

  When the rotation shaft 31 is further rotated leftward, as shown in FIG. 5B, the steel ball 42b is fitted into the hole 43b at the same time as the steel ball 42c is fitted into the hole 43c. As indicated by K1 in FIG. 9, this position is the position immediately before the flashback area during left rotation. In order to further reduce the heating power of the main burner 21 by turning leftward, the torque required to simultaneously escape the two steel balls 42b and 42c from the two holes 43b and 43c is applied to the rotary shaft 31. There must be. The magnitude of the torque is about twice as much as the torque required to leave the ignition position.

  When the large torque is applied and the state before the flashback area is removed, the rotary shaft 31 still has a large torque, so the rotary shaft 31 rotates leftward at once and passes through the flashback area. . Then, as shown in (c), the steel ball 42a fits into the hole 43a at the same time as the steel ball 42a fits into the hole 43a. This position is a position that has passed through the flashback area as indicated by K2 in FIG. The rotation shaft 31 can be further rotated leftward, and finally can be rotated to a position indicated by MIN which is a position of about 180 degrees. When returning the rotation shaft 31 to the right from the position, hysteresis occurs as described above, and therefore, the route shown by the broken line in FIG. 9 is taken. In this case, immediately before the flashback region in the right direction (K3 in FIG. 9), the state shown in (c) of FIG. 8 occurs and a click feeling is generated, and the rotating shaft 31 is further moved from the state shown in (c). A large torque is required to rotate rightward. Then, when such a large torque is applied, the rotating shaft 31 is rotated from the state (c) to the position indicated by K4 in FIG. 9 to the state (b) and reverses without stopping in the flashback region. It will pass through the fire area.

  By the way, in the above embodiment, the click feeling is generated at five locations (T1, K1, K2, K3, K4) using the three holes 43c, 43b, 43c. For example, as shown in FIG. You may make it produce a click feeling using five holes. In this case, a small click feeling is caused by fitting one steel ball 44a into one hole 45a at the ignition position (a). Next, at the position of K1, as shown in (b), the two steel balls 44b and 44c are fitted into the two holes 45b at the same time, thereby generating a large click feeling. Then, when a large torque is applied to the rotating shaft 31 from the state and rotated leftward, as shown in (c), these two steels are passed through the flashback region (position of K2). The balls 44b and 44c fit into the two holes 45c at the same time, and a click feeling is generated. Also, when returning to the right, K3 before the flashback area becomes the state shown in (c) and a click feeling is generated, and after passing through the flashback area, the click becomes the state shown in (b) at K4. The feeling is the same as in the embodiment shown in FIG.

  In the above embodiment, a click feeling with one steel ball is given at the ignition position (the state shown in FIGS. 8 and 10 (a)), and a click feeling with two steel balls before and after the flashback region. (The state shown in (b) and (c)), but the generation of the click feeling at the ignition position is abolished, and the click feeling before and after the flashback region is generated by one steel ball. Also good. In addition, the present invention is not limited to the above-described form with respect to other points, and various modifications may be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Gas stove device 2 Gas burner 11 Thermal power control knob 21 Parent burner 22 Child burner 3 Gas cock

Claims (5)

  An annular parent burner and a child burner that is located in the center of the parent burner and is smaller than the parent burner. Turn the rotary operation type thermal power adjustment knob that adjusts the thermal power to a predetermined angle from the fire extinguishing position to ignite both burners. In the gas stove device that extinguishes the master burner by further rotating the heating power adjustment knob beyond the ignition position and reduces the heating power of the child burner, the range in which the heating power adjustment knob is further rotated from the ignition position The range from the predetermined small fire state where the fire of the parent burner is changed to the fire extinguishing state is set as the flashback area for the parent burner, and the thermal power adjustment knob is moved from the ignition position side to the flashback area. A gas stove device in which a torque increasing point at which the rotating torque of the heating power adjustment knob increases immediately before the flashback area when rotating toward the back is provided.   When the parent burner rotates the thermal power adjustment knob to the ignition position side from the fire extinguishing state in the state where it has passed through the flashback area, the rotation torque of the thermal power adjustment knob increases immediately before the flashback area. The gas stove device according to claim 1, wherein a torque increasing point is provided.   Confirmation torque that can confirm the passage of the flashback region by the increase of the turning torque at the position passing through the flashback region from the torque increase point and the position of passing through the flashback region from the second torque increase point The gas stove apparatus according to claim 2, wherein an increase point is provided.   The gas stove according to claim 3, further comprising a click mechanism that generates a click feeling when the sphere is fitted into the hole at least at any one of the torque increase point, the second torque increase point, and the confirmation torque increase point. apparatus.   A click mechanism for generating a click feeling when the thermal power adjustment knob is turned to the ignition position is provided, and the click mechanism at the ignition position is fitted into the hole at the torque increase point and the second torque increase point based on the number of spheres fitted into the hole. The number of spheres is increased so that the torque for turning the thermal power control knob from the torque increase point and the second torque increase point is larger than the torque for rotating the thermal power control knob from the ignition position. The gas stove apparatus according to claim 4, wherein

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