JP5701821B2 - Stove burner - Google Patents

Description

  The present invention relates to a stove burner including a main burner and a sub-burner whose maximum heating power is smaller than that of the main burner.

  Conventionally, as this type of stove burner, gas amount adjusting means for adjusting the amount of gas supplied to the main burner and the sub-burner in conjunction with the operation of the operating element for adjusting the thermal power, and the operating element exceeds a predetermined switching position. Main burner extinguishing means that extinguishes the main burner by stopping the gas supply to the main burner while the gas supply to the sub-burner continues while operating to the minimum thermal power position side. It is known that the gas supply to the main burner is resumed when it is operated to the maximum thermal power position side beyond the temperature and the fire is transferred from the sub burner to the main burner (see, for example, Patent Document 1). .

  Here, even if the gas supply to the main burner is stopped by the main burner extinguishing means, it takes some time until the gas remaining in the main burner is purged, and the residual gas in the main burner is transferred from the sub burner to the fire. There is. If the residual gas in the main burner is transferred in this way, a so-called snap flash is produced. Pachin flashback is a phenomenon in which a flame due to residual gas enters the flame hole of the main burner, and a fire extinguishing sound such as “pachin” is generated and extinguishes.

JP 2009-2529 A

  In view of the above points, an object of the present invention is to provide a burner for a stove that can suppress a flashback flash.

In order to solve the above-described problems, the present invention relates to a main burner, a sub-burner having a maximum thermal power smaller than the main burner, and the amount of gas supplied to the main burner and the sub-burner in conjunction with the operation of the operation controller for adjusting the thermal power. When the gas amount adjusting means to be adjusted and the operation element are operated to the minimum thermal power position side beyond the predetermined switching position, the gas supply to the main burner is stopped while the gas supply to the sub burner is continued. A stove burner having a main burner extinguishing means for extinguishing the burner, and when the operation element is operated to the maximum heating power position side beyond the switching position, the gas supply to the main burner is resumed, and the sub burner The main burner has a control means for controlling the gas amount adjusting means, and the control means has a main burner extinguishing means when the operating element is operated to the minimum thermal power position side beyond the switching position. Gas to the main burner at The sheet from the stop to a predetermined waiting time has passed, even if the operating element is operated at a position between the predetermined position and the switching position of the minimum thermal power position nearer the switching position, the feed gas to the secondary burner Gas amount restriction control is performed to restrict the amount so as not to increase from a predetermined amount corresponding to the predetermined position.

  According to the present invention, when the operating element is operated to the minimum thermal power position side beyond the switching position, the operating element is operated to a position between the predetermined position and the switching position until the waiting time elapses. The amount of gas supplied to the auxiliary burner does not increase from the predetermined amount. Therefore, the flame of the sub-burner remains small, and the fire transfer from the sub-burner to the residual gas of the main burner is suppressed. And since the residual gas of the main burner is purged during the waiting time, even if the gas amount restriction control is canceled after the waiting time elapses and the flame of the auxiliary burner becomes large, the residual gas is not transferred to the residual gas. Accordingly, it is possible to suppress the flashback of the main burner due to the fire transfer to the residual gas.

  If the temperature of the main burner is low, it will be difficult for a crackling flashback to occur due to fire transfer from the sub-burner to the residual gas of the main burner. For this reason, it is desirable to prohibit the gas amount restriction control when the temperature of the main burner is equal to or lower than a predetermined set temperature. According to this, it is possible to avoid performing the gas amount restriction control unnecessarily in a state where it is difficult to generate a flashing flash, which is advantageous.

The perspective view which shows the burner for stove of embodiment of this invention. Sectional drawing cut | disconnected by the II-II line | wire of FIG. The flowchart which shows the control content of the flow control valve which a controller performs.

  The stove burner of the embodiment of the present invention shown in FIGS. 1 and 2 includes a main burner 1 and a sub burner 2 adjacent to the lower side of the main burner 1. More specifically, the stove burner is composed of a burner body 3 having a triple cylinder inside and outside an outer cylinder 31, an intermediate cylinder 32, and an inner cylinder 33, and an intermediate cylinder 32. A burner head 4 having an inner annular hanging wall 41 fitted to the outer circumferential portion, an upper annular wall 42 on the upper surface of the outer peripheral portion, and a lower annular wall 43 on the lower surface of the outer peripheral portion seated on the upper end portion of the outer cylindrical body 31; A burner cap 5 is provided which has an inner annular hanging wall 51 fitted to the cylindrical body 33 and is seated on the upper end of the upper annular wall 42 on the lower surface of the outer peripheral portion. The intermediate cylinder 32, the inner cylinder 33, the burner head 4 and the burner cap 5 constitute the main burner 1, and the outer cylinder 31, the intermediate cylinder 32 and the burner head 4 constitute the sub burner 2.

  In addition, a mixing pipe (main burner mixing pipe) 11 communicating with the space between the intermediate cylinder 32 and the inner cylinder 33 serving as the internal space of the main burner 1 is provided and the outer cylinder serving as the internal space of the sub burner 2. A mixing pipe (sub-burner mixing pipe) 21 communicating with the space between the body 31 and the intermediate cylinder 32 is provided. Further, a flame hole (main burner flame hole) 12 for the main burner 1 from which an air-fuel mixture (mixed gas of fuel gas and primary air) from the main burner mixing pipe 11 is ejected is formed on the upper annular wall 42 of the burner head 4. A plurality of flame holes (sub-burner flame holes) 22 for the sub-burner 2 through which the air-fuel mixture from the sub-burner mixing pipe 21 is jetted to the lower annular wall 43 of the burner head 4 are formed at intervals in the circumferential direction. Are formed at intervals in the circumferential direction.

  The total opening area of the auxiliary burner flame holes 22 is smaller than the total opening area of the main burner flame holes 12, and the maximum heating power of the auxiliary burner 2 is smaller than that of the main burner 1. Further, a target portion 44 that faces an ignition electrode (not shown) is provided at one location around the outer peripheral surface of the burner head 4.

  The gas supply path 6 for supplying fuel gas to the stove burner includes an ignition valve 61 which is opened and closed by a point-extinguishing operation element (not shown) on the front of the stove, and an electric valve 61 which is opened and closed by a fire extinguishing operation. A flow control valve 62 is interposed. Further, the gas supply path 6 is branched into a supply path 6a for the main burner 1 and a supply path 6b for the sub burner 2 on the downstream side of the flow rate control valve 62, and the main burner is connected to the supply path 6a for the main burner 1. An electromagnetic valve 63 serving as a fire extinguishing means is interposed.

  The flow rate adjusting valve 62 and the electromagnetic valve 63 are controlled via a controller 8 which is a control means by operating an adjusting knob 7 which is a heating power adjusting operator provided on the front surface of the stove. Referring to FIG. 1, the adjustment knob 7 is freely rotatable between a “1” position which is a minimum heating power position and a “10” position which is a maximum heating power position, and a signal indicating the rotation angle θ of the adjustment knob 7 is obtained. Input to the controller 8. Then, the controller 7 controls the flow rate control valve 62 so that the amount of gas flowing through the gas supply path 6 changes according to the rotation angle θ of the adjustment knob 7, that is, the amount of gas increases as θ increases. To control. The controller 7 further closes the electromagnetic valve 63 when the adjustment knob 7 is rotated to the “1” position side beyond the “4” position as the switching position, and the adjustment knob 7 exceeds the “4” position. Then, when the rotary operation is performed to the “10” position side, the solenoid valve 63 is controlled to open. When the solenoid valve 63 is closed, the gas supply to the main burner 1 is stopped while the gas supply to the sub-burner 2 is continued, the main burner 1 is extinguished, and when the solenoid valve 63 is opened, the main valve 1 is opened. Gas supply to the burner 1 is resumed, and the secondary burner 2 is transferred to the main burner 1.

  By the way, even if the gas supply to the main burner 1 is stopped by closing the electromagnetic valve 63, it takes some time until the gas remaining in the main burner 1 is purged. Then, the residual gas of the main burner 1 may be transferred from the auxiliary burner 2 to cause a flashback. Therefore, in the present embodiment, the flow control valve 62 is controlled by the controller 8 as shown in FIG. Hereinafter, this control will be described in detail. In FIG. 3, θ1, θ2, and θ4 are rotation angles of the adjustment knob 7 at the “1” position, “2” position, and “4” position, respectively.

  In controlling the flow rate adjusting valve 63, first, in STEP 1, it is determined whether or not the adjustment knob 7 is moved to the “1” position side beyond the “4” position, that is, the rotation angle θ of the adjustment knob 7 is from θ1 to θ4. If θ1 ≦ θ ≦ θ4, the process proceeds to STEP 2 and whether a predetermined waiting time (for example, 2 seconds) has elapsed from the time when θ1 ≦ θ ≦ θ4 is satisfied. Is determined. When θ1 ≦ θ ≦ θ4, the solenoid valve 63 is closed and the gas supply to the main burner 1 is stopped. Therefore, in STEP2, the gas supply to the main burner 1 is stopped and the process waits. It is determined whether or not time has elapsed.

  If the waiting time has not elapsed, the process proceeds to STEP 3 to determine whether or not the adjustment knob 7 is in the range from the “1” position to the “2” position, that is, whether θ1 ≦ θ ≦ θ2. . If θ1 ≦ θ ≦ θ2, the routine proceeds to STEP 3 where normal control of the flow control valve 62 is performed, and the amount of gas supplied to the auxiliary burner 2 is an amount corresponding to the “1” position according to the position of the adjustment knob 7. And the amount corresponding to the “2” position. On the other hand, if the determination result in STEP 3 is “NO”, that is, if θ 2 <θ ≦ θ 4, the process proceeds to STEP 5 and the amount of gas supplied to the sub-burner 2 is maintained at the amount corresponding to the “2” position. .

  When the waiting time has elapsed since the gas supply to the main burner 1 was stopped, or when the adjustment knob 7 has been operated to a position larger than “4”, the routine proceeds to STEP 6 where normal control of the flow rate adjustment valve 62 is performed. The amount of gas flowing through the gas supply path 6 is varied according to the position of the adjustment knob 7.

  According to this embodiment, the adjustment knob 7 is operated to a position between the “2” position and the “4” position until the waiting time elapses after the gas supply to the main burner 1 is stopped. Thus, the gas amount restriction control for restricting the amount of gas supplied to the sub-burner 2 so as not to increase from the amount corresponding to the “2” position is performed. Therefore, the flame of the sub burner 2 remains small, and the fire transfer from the sub burner 2 to the residual gas of the main burner 1 is suppressed. And since the residual gas of the main burner 1 is purged during the waiting time, even if the gas amount restriction control is released after the waiting time has elapsed and the flame of the sub-burner 2 becomes large, the residual gas will not be transferred to the residual gas. . Accordingly, it is possible to suppress the flashback of the main burner 1 due to the fire transfer to the residual gas.

  Note that the gas amount restricted by the gas amount restriction control is not limited to the amount corresponding to the “2” position, and may be the minimum gas amount corresponding to the “1” position, for example. In this case, the amount of gas supplied to the sub-burner 2 can be maintained even if the adjustment knob 7 is operated to any position of “4” or less until the waiting time elapses after the gas supply to the main burner 1 is stopped. The amount corresponding to the “1” position is maintained.

  By the way, when the temperature of the main burner 1 is low, it is difficult to generate a flashback due to a fire transfer from the auxiliary burner 2 to the residual gas of the main burner 1. Therefore, when the temperature of the main burner 1 is equal to or lower than a predetermined set temperature, the gas amount restriction control may be prohibited. According to this, it is possible to avoid that the gas amount restriction control is performed unnecessarily in a state where it is difficult to generate a flashing back-up, and it becomes possible to avoid that the heating power of the auxiliary burner 2 cannot be adjusted according to the operation of the adjustment knob 7. .

  Note that whether or not the temperature of the main burner 1 is equal to or lower than the set temperature can be determined by detecting the temperature of the burner cap 5 constituting the main burner 1 with a sensor such as a thermocouple. Moreover, since the temperature of the main burner 1 changes according to the combustion time of the main burner 1 before extinguishing the main burner 1, when the combustion time of the main burner 1 is a predetermined time or less, the temperature of the main burner 1 is You may judge that it is below preset temperature.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, the single position of “4” of the adjustment knob 7 is set as the switching position. However, as the switching position, the second switching position slightly displaced to the first switching position and the larger heating power side. When the adjustment knob 7 is operated to the minimum thermal power position side beyond the first switching position, the solenoid valve 63 is closed, and the adjustment knob 7 is operated beyond the second switching position to the maximum thermal power position side. Then, the electromagnetic valve 63 may be opened. Furthermore, in the above embodiment, the control member for adjusting the thermal power is configured by the adjustment knob 7, but the control member for adjusting the thermal power can also be configured by something other than the control knob such as a lever.

  In the above-described embodiment, the gas supply path 6 upstream of the branch portion between the supply path 6a for the main burner 1 and the supply path 6b for the sub burner 2 is provided with a flow rate adjusting valve 62 as gas amount adjusting means. It is also possible to provide a flow rate adjusting valve in each of the main burner 1 supply path 6a and the auxiliary burner 2 supply path 6b. In this case, the flow rate adjustment valve provided in the supply path 6a for the main burner 1 may be fully closed, and this flow rate adjustment valve may also be used as the main burner extinguishing means.

  Moreover, in the said embodiment, although the main burner 1 and the subburner 2 are arrange | positioned adjacent to the upper and lower sides, a subburner is arrange | positioned in the radial direction center part, and the cyclic | annular main burner is arrange | positioned so that this subburner may be enclosed. It is also possible. In this case, a main burner flame hole may be formed in the main burner so as to face the radially inner sub-burner, and the main burner may be transferred to the main burner. In the case where the auxiliary burner 2 is provided on the lower side of the main burner 1 as in the above embodiment, the flame of the auxiliary burner 2 is formed upward so that the residual gas of the main burner 1 is transferred from the auxiliary burner 2 to the fire. Therefore, it is more beneficial to perform the gas amount restriction control.

  DESCRIPTION OF SYMBOLS 1 ... Main burner, 2 ... Sub burner, 6 ... Gas supply path, 62 ... Flow rate adjustment valve (gas amount adjustment means), 63 ... Solenoid valve (main burner extinguishing means), 7 ... Adjustment knob (operator for heating power adjustment) 8, controller (control means).

Claims (2)

A main burner, a sub burner with a maximum thermal power smaller than the main burner, a gas amount adjusting means for adjusting the amount of gas supplied to the main burner and the sub burner in conjunction with the operation of the operation controller for adjusting the thermal power, And a main burner extinguishing means that extinguishes the main burner by stopping the gas supply to the main burner while the gas supply to the sub-burner is continued when operated to the minimum thermal power position side beyond the switching position of A burner for
When the operation element is operated to the maximum thermal power position side beyond the switching position, the gas supply to the main burner is restarted and the sub burner is transferred to the main burner.
Control means for controlling the gas amount adjusting means, and the control means stops the gas supply to the main burner by the main burner extinguishing means when the operation element is operated to the minimum heating power position side beyond the switching position. Until the predetermined waiting time elapses, even if the operating element is operated to a position between the predetermined position closer to the minimum thermal power position than the switching position and the switching position, the amount of gas supplied to the sub-burner is set to the predetermined position. A stove burner characterized by performing gas amount restriction control for restricting from an increase to a corresponding predetermined amount.   2. The stove burner according to claim 1, wherein the gas amount restriction control is prohibited when the temperature of the main burner is equal to or lower than a predetermined set temperature.

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