JP6966362B2 - Burner for stove - Google Patents

Description

The present invention relates to a burner for a stove having two upper and lower flame openings that open on the outer peripheral surface of a burner head provided on the burner body.

Conventionally, as a burner for this type of stove, it is possible to switch between a state where gas is supplied only to the lower flame port and a state where gas is also supplied to the upper flame port, and the gas is linked to the operation of the operating member for adjusting the thermal power. It is known that the amount of gas supplied to the upper flame port and the amount of gas supplied to the lower flame port are variable by the amount adjusting means (see, for example, Patent Document 1). With this, the operating member can be displaced to a simmering position, a medium-heated position unidirectionally away from the simmering position, and a high-heated position unidirectionally away from the medium-heated position. Then, when the operating member is operated in one direction or the other direction between the simmering position and the high heat position, the gas amount adjusting means sets the amount of gas supplied to the lower flame port to the minimum amount set for the lower flame port. And the maximum amount, and when the operating member is operated in one direction or the other direction between the medium heat position and the high heat position, the amount of gas supplied to the upper flame port is increased or decreased. Increases or decreases between the minimum and maximum amounts set for, and when the operating member exceeds the medium heat position toward the simmering position, the gas supply to the upper flame port is stopped, and the operating member is in the high heat position. When the medium heat position is exceeded, the gas supply to the upper flame opening is restarted.

By the way, in cooking with a burner for a stove, it is often the case that the object to be heated is first heated on high heat and then the heating of the object to be heated is continued on a low heat. Here, in the above-mentioned conventional example, since the simmering position and the high heat position of the operating member are located at one end and the other end of the operating range of the operating member and are largely separated, it is necessary to switch the thermal power of the burner from the high heat to the simmering fire. Operability is poor because it is necessary to move the operating member significantly.

Further, when the operating member exceeds the medium heat position toward the high heat position, the gas supply to the upper flame port is restarted with the minimum amount. Therefore, it takes some time for the gas ejection speed from the upper flame port to rise to a speed at which no flashback occurs. As a result, the fire is transferred from the lower flame port before the gas ejection speed from the upper flame port increases to a speed at which the flash fire does not occur, and the flashback fire at the upper flame port is likely to occur.

Japanese Unexamined Patent Publication No. 9-303719

In view of the above points, the present invention provides a burner for a stove that can improve the operability of switching from high heat to low heat and suppress flashback when the fire is transferred from the lower flame to the upper flame. That is the issue.

In order to solve the above problems, the present invention is provided with two upper and lower flame ports that open on the outer peripheral surface of the burner head provided on the burner body, and supplies gas only to the lower flame port and the upper flame port. The amount of gas supplied to the upper flame port and the amount of gas supplied to the lower flame port can be changed by the gas amount adjusting means linked to the operation of the operating member for adjusting the thermal power. In the burner for the stove, the operating member can be displaced to the low flame position, the high flame position unidirectionally away from the low flame position, and the simmering flame position unidirectionally away from the high flame position. When the operating member is operated in one direction or the other direction between the low heat position and the high heat position, the amount of gas supplied to the upper flame port and the amount of gas supplied to the lower flame port are set to each flame in the upper and lower stages. The gas supplied to the lower flame port when the operating member is operated in one direction or the other direction between the high heat position and the simmering position by increasing or decreasing between the minimum amount and the maximum amount set for the mouth. When the amount is decreased or increased between the maximum amount and the minimum amount set for the lower flame port, and the operating member is between the predetermined switching position between the high heat position and the low flame position and the high heat position. The amount of gas supplied to the upper flame port is maintained at the maximum amount set for the upper flame port, and when the operating member exceeds the switching position toward the melting flame position, the gas supply to the upper flame port is stopped and operated. It is characterized in that when the member exceeds the switching position toward the high heat position, the gas supply to the upper flame port is restarted at the maximum amount set for the upper flame port.

According to the present invention, since the high-heat position and the low-heat position of the operating member are close to each other, the operability of switching from high-heat to low-heat is improved, and the usability is improved. Further, when the operating member exceeds the switching position toward the high heat position, the gas supply to the upper flame port is restarted at the maximum amount. Therefore, the gas ejection speed from the upper flame port quickly increases to a speed at which the flame does not flash back, and the flashback when the fire is transferred from the lower flame port to the upper flame port can be suppressed.

Further, in the present invention, when the operating member is located between the predetermined position between the high heat position and the switching position and the simmering position, the gas amount adjusting means determines the amount of gas supplied to the lower flame port with respect to the lower flame port. It is desirable to be configured to maintain the set minimum amount. According to this, the amount of gas supplied to the lower flame port becomes the minimum amount when the operating member exceeds the switching position toward the high heat position, so that the fire transfer from the lower flame port to the upper flame port is delayed. Coupled with the rapid increase in the gas ejection speed from the upper flame opening, the gas ejection speed from the upper flame opening becomes higher than the speed at which the fire does not flash back at the time of the fire transfer, and the flashback during the fire transfer is more reliable. Can be prevented.

Further, in the present invention, the operating member can be operated to a second low heat position unidirectionally away from the simmering position, and the gas amount adjusting means is such that the operating member is located between the simmering position and the second low heat position. When operated in one direction or the other direction, it is desirable that the amount of gas supplied to the lower flame port is configured to increase or decrease between the minimum amount and the maximum amount set for the lower flame port. According to this, delicate adjustment of the thermal power by combustion only at the lower flame port can be performed by the operation between the low heat position of the operating member and the second low heat position, and the usability is further improved.

FIG. 3 is a cross-sectional view of a main part of a stove provided with a burner for the stove according to the embodiment of the present invention. The perspective view of the burner for a stove of an embodiment. (A)-(d) Cross-sectional view when the operation member for adjusting the thermal power of the gas amount control valve provided in the burner for the stove of the embodiment is operated to the low heat position, the high heat position, the low heat position, and the medium heat position. The graph which shows the change characteristic of the amount of gas supplied to the lower flame opening and the upper flame opening.

With reference to FIG. 1, A is a stove main body, B is a top plate covering the upper surface of the stove main body A, and the burner 1 for the stove is installed facing the burner opening B1 opened in the top plate B. Further, on the top plate B, a trivet C on which a heated object such as a pot heated by the burner 1 is placed so as to surround the burner opening B1 is placed. The trivet C is composed of an annular trivet frame C1 and a plurality of trivet claws C2 radially attached to the trivet frame C1.

The burner 1 includes a burner body 2 inserted through the burner opening B1 and a burner head 3 on the burner body 2. As shown in FIG. 2, a large number of upper and lower flame openings 4U and 4L are opened on the outer peripheral surface of the burner head 3 with an interval in the circumferential direction. It should be noted that the burner head 3 located in the same direction as the plurality of trivet claws C2 of the trivet C is designated as the trivet claw matching portion 3a, and each trivet claw matching portion 3a is touched by the flame. In order to prevent incomplete combustion, only the lower flame port 4L is formed without forming the upper flame port 4U.

The burner body 2 is composed of an inner and outer triple cylinder consisting of an outer cylinder 21, an intermediate cylinder 22, and an inner cylinder 23. The outer cylinder 21 is provided with a skirt portion 21a that hangs down from the outer periphery of the upper end portion thereof. Then, a covering D covering the burner opening B1 of the top plate B is externally inserted into the skirt portion 21a so that the covering D can prevent the intrusion of spilled soup from the burner opening B1. Further, protrusions C3 are provided at one or a plurality of locations in the circumferential direction of the inner circumference of the Gotoku frame C1 of the Gotoku C, and a notch D1 into which the protrusion C3 fits is formed on the outer periphery of the covering D to phase the Gotoku C. I am trying to decide.

The burner head 3 has an annular lower head member 31 in which a tubular portion 31a fitted to the intermediate tubular body 22 of the burner body 2 is vertically provided on the inner circumference, and a cylinder fitted to the inner tubular body 23 of the burner body 2 on the lower surface. It is composed of a disk-shaped upper head member 32 on which the portion 32a is vertically provided. An upper annular wall 33 on which the upper head member 32 is seated is erected on the outer peripheral portion of the upper surface of the lower head member 31. The upper annular wall 33 is formed with a large number of grooves forming an upper flame port 4U that is recessed downward from the upper end surface thereof with an interval in the circumferential direction. The upper end of these grooves is closed by the upper head member 32 so that the upper flame port 4U is defined between the lower head member 31 and the upper head member 32.

Further, a lower annular wall 34 seated on the upper end portion of the outer cylinder 21 of the burner body 2 is vertically provided on the lower peripheral portion of the lower head member 31. On the lower annular wall 34, a large number of grooves forming the lower flame port 4L, which are recessed upward from the lower end surface thereof, are formed with an interval in the circumferential direction. Then, the lower end of these grooves is closed by the upper end portion of the outer cylinder 21, so that the lower flame port 4L is defined between the burner body 2 and the lower head member 31.

The burner 1 is further intermediate between the first mixing tube 5U for the upper flame port 4U communicating with the space between the intermediate cylinder 22 and the inner cylinder 23 of the burner body 2 and the outer cylinder 21 of the burner body 2. It is provided with a second mixing tube 5L for the lower flame port 4L that communicates with the space between the cylinder 22 and the cylinder body 22. With reference to FIG. 2, fuel gas is supplied to the first mixing pipe 5U via the first branch passage 6U branched from the common gas supply passage 6, and the gas supply passage 6 is supplied to the second mixing pipe 5L. The fuel gas is supplied through the second branch path 6L branched from the above. Then, the fuel gas and the primary air sucked into each of the mixing pipes 5U and 5L are mixed in the first and second mixing pipes 5U and 5L, and the mixed gas from the first mixing pipe 5U is in the middle of the burner body 2. It is ejected from the upper flame port 4U through the space between the cylinder 22 and the inner cylinder 23 and the space between the lower head member 31 and the upper head member 32, and the mixed gas from the second mixing pipe 5L is burner. The gas is ejected from the lower flame port 4L through the space between the outer cylinder 21 and the intermediate cylinder 22 of the body 2 and the space between the outer cylinder 21 and the lower head member 31.

A main valve 61 composed of a solenoid valve is interposed in the gas supply path 6, and a gas amount control valve 71 is interposed in a branch portion of both the first and second branch paths 6U and 6L, and the first branch is provided. A shut-off valve 72 made of a solenoid valve is interposed in the road 6U, and the gas amount adjusting valve 71 and the shut-off valve 72 constitute a gas amount adjusting means 7. The main valve 61, the gas amount control valve 71, and the shutoff valve 72 are controlled by a control means 8 including a microcomputer. An operation signal of a point fire extinguishing button 9 provided freely on the operation panel of the stove is input to the control means 8. The point fire extinguishing button 9 is displaced to the protruding combustion position by the action of the push-push mechanism by pushing once from the immersive fire extinguishing position. Then, when the point fire extinguishing button 9 is set to the fire extinguishing position, the main valve 61 is closed to stop the gas supply to the burner 1, and when the point fire extinguishing button 9 is set to the combustion position, the main valve 61 is opened. At the same time as making a valve, an igniter (not shown) is operated to ignite the burner 1.

Further, the point fire extinguishing button 9 is rotatable for adjusting the thermal power in a state of being projected to the combustion position. That is, the point fire extinguishing button 9 is also used as an operating member for adjusting the thermal power. Here, the point fire extinguishing button 9 has a low heat position, a high heat position separated from the low heat position in the circumferential direction, that is, a counterclockwise direction, a simmering position separated from the high heat position in the counterclockwise direction, and a counterclockwise direction from the simmering position. It can be rotationally displaced to a second low heat position away from the direction.

As shown in FIG. 3, the gas amount control valve 71 includes a valve body 711 that is rotated by the control means 8 via a motor (not shown). The valve body 711 has an inflow hole 712 that can communicate with the gas supply path 6, a valve portion 713 that forms an orifice hole 713a that communicates with the inflow hole 712, and a second valve portion 713 located on both sides in the circumferential direction. Outflow holes 714 and 714 for the branch road 6L and an outflow hole 715 for the first branch road 6U including an inflow hole 7112 and a shaft hole that always communicates with the first branch road 6U are provided. When the point fire extinguishing button 9 is in the low heat position, the valve body 711 is displaced to the rotation position shown in FIG. 3 (a), and the outflow hole 714 located on the counterclockwise side of the valve portion 713 is in the second branch path 6L. As shown in FIG. 4, the inflow hole 712 slightly communicates with the gas supply path 6 and the amount of gas supplied to the upper flame port 4U and the amount of gas supplied to the lower flame port 4L are in the upper and lower stages. It becomes the minimum amount set for each flame port 4U, 4L of. When the point fire extinguishing button 9 is in the high heat position, the valve body 711 is displaced to the rotation position shown in FIG. The amount of gas supplied to the lower flame port 4L and the amount of gas supplied to the lower flame port 4L are the maximum amounts set for the upper and lower flame ports 4U and 4L, as shown in FIG. When the point fire extinguishing button 9 is in the simmering position, the valve body 711 is rotationally displaced to the position shown in FIG. Gas flows through the second branch path 6L, and the amount of gas supplied to the lower flame port 4L becomes the minimum amount set for the lower flame port 4L as shown in FIG. When the point fire extinguishing button 9 is in the second low heat position, the valve body 711 is rotationally displaced to the position shown in FIG. 3 (d), and the outflow hole 714 located on the clockwise side of the valve portion 713 is the second branch path. Communicating with 6L, the amount of gas supplied to the lower flame port 4L becomes the maximum amount set for the lower flame port 4L as shown in FIG. Then, when the point fire extinguishing button 9 is operated counterclockwise or clockwise between the low heat position and the high heat position, the amount of gas supplied to the upper flame port 4U and the amount of gas supplied to the lower flame port 4L are changed. Increased or decreased between the minimum and maximum amounts set for each of the upper and lower flame ports 4U, 4L, and the point fire extinguishing button 9 operates counterclockwise or clockwise between the high heat position and the low flame position. When this is done, the amount of gas supplied to the lower flame port 4L is reduced or increased between the maximum amount and the minimum amount set for the lower flame port 4L, and the point fire extinguishing button 9 is set to the melting position and the second low heat position. When operated counterclockwise or clockwise with, the amount of gas supplied to the lower flame port 4L is increased or decreased between the minimum and maximum amounts set for the lower flame port 4L, and further. When the point fire extinguishing button 9 is located between the predetermined switching position (position indicated by θa in FIG. 4) between the high heat position and the low heat position and the high heat position, the amount of gas supplied to the upper flame port 4U is the upper stage. The maximum amount set for the flame port 4U is maintained.

Further, when the point fire extinguishing button 9 exceeds the switching position θa toward the melting fire position by the rotation operation in the counterclockwise direction from the high heat position, the shutoff valve 72 is closed and the gas is supplied to the upper flame port 4U. When the point fire extinguishing button 9 exceeds the switching position θa toward the high heat position by rotating clockwise from the melting fire position, the shutoff valve 72 is opened and the gas to the upper flame port 4U is opened. The supply is restarted at the maximum amount set for the upper flame port 4U.

According to this, since the high heat position and the low heat position of the point fire extinguishing button 9 are close to each other, the operability of switching from high heat to low heat is improved, and further, the delicate heat power adjustment by combustion only at the lower flame port 4L is also a point. It can be performed by operating the fire extinguishing button 9 between the low heat position and the second low heat position, and the usability is improved. Further, when the point fire extinguishing button 9 exceeds the switching position θa toward the high heat position, the gas supply to the upper flame port 4U is restarted at the maximum amount, so that the gas ejection speed from the upper flame port 4U is counter-fired. It quickly rises to a speed that does not, and can suppress flashback when the fire is transferred from the lower flame port 4L to the upper flame port 4U.

Further, in the present embodiment, when the point fire extinguishing button 9 is located between the predetermined position between the high heat position and the switching position θa (the position indicated by θb in FIG. 4) and the simmering position, the lower flame port 4L is connected. The amount of supply gas is maintained at the minimum amount set for the lower flame port 4L. According to this, when the point fire extinguishing button 9 exceeds the switching position θa toward the high heat position, the amount of gas supplied to the lower flame port 4L becomes the minimum amount, and from the lower flame port 4L to the upper flame port 4U. The fire transfer is delayed. Therefore, in combination with the rapid increase in the gas ejection speed from the upper flame port 4U as described above, the gas ejection speed from the upper flame opening 4U becomes higher than the speed at which the fire does not flash back at the time of the fire transfer, and the fire transfer occurs. It is possible to prevent the flashback of time more reliably.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, the point fire extinguishing button 9 is used as the operating member for adjusting the thermal power, but it is also possible to configure the operating member for adjusting the thermal power with a lever that is swung. In this case, the lever can be swung from the high heat position to the fire extinguishing position beyond the low heat position, and by operating from the low heat position to the fire extinguishing position, the amount of gas supplied to the upper flame port 4U and the gas supplied to the lower flame port 4L. The amount may be reduced from the above minimum amount to zero. Further, it is also possible to use a gas amount adjusting means 7 other than the above-described embodiment.

1 ... Burner for stove, 2 ... Burner body, 3 ... Burner head, 4U ... Upper flame port, 4L ... Lower flame port, 7 ... Thermal power adjusting means, 9 ... Point fire extinguishing button (operation member for thermal power adjustment).

Claims (3)

Equipped with two upper and lower flame openings that open on the outer peripheral surface of the burner head provided on the burner body, it is possible to switch between a state where gas is supplied only to the lower flame port and a state where gas is also supplied to the upper flame port. In a burner for a stove, the amount of gas supplied to the upper flame port and the amount of gas supplied to the lower flame port can be changed by a gas amount adjusting means linked to the operation of the operation member for adjusting the thermal power.
The operating member can be displaced to a low-heat position, a high-heat position unidirectionally away from the low-heat position, and a simmering position unidirectionally away from the high-heat position. When operated in one direction or the other direction between the position and the position, the amount of gas supplied to the upper flame port and the amount of gas supplied to the lower flame port are the minimum amount set for each of the upper and lower flame openings. The amount of gas supplied to the lower flame opening is set for the lower flame opening when the operating member is operated in one direction or the other direction between the high heat position and the low heat position by increasing or decreasing the amount from the maximum amount. When the operating member is between the predetermined switching position between the high-heat position and the low-heat position and the high-heat position, the gas supplied to the upper flame port is decreased or increased between the maximum amount and the minimum amount. The amount is maintained at the maximum amount set for the upper flame port, and when the operating member exceeds the switching position toward the melting fire position, the gas supply to the upper flame port is stopped, and the operating member switches toward the high heat position. A burner for a stove that is configured to restart the gas supply to the upper flame opening at the maximum amount set for the upper flame opening when the position is exceeded. When the operating member is located between the predetermined position between the high heat position and the switching position and the stove position, the gas amount adjusting means reduces the amount of gas supplied to the lower flame port to the minimum amount set for the lower flame port. The stove burner according to claim 1, wherein the burner is configured to be maintained. The operating member can be operated up to a second low heat position unidirectionally away from the simmering position, and the gas amount adjusting means allows the operating member to operate in one direction or the other direction between the simmering position and the second low heat position. The first or second aspect of claim 1 or 2, wherein when operated, the amount of gas supplied to the lower flame port is configured to increase or decrease between the minimum amount and the maximum amount set for the lower flame port. Burner for the stove.

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