JP2015166641A - Burner for cooking stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burner for a cooking stove, which can keep the supply of a firing gas mixture optimum without hardly receiving the influence of the floating or the like of a burner head.SOLUTION: A burner body 2 comprises a pair of a first side wall 24 and a first rear wall 25 to provide an ignition plug accommodation part 20 for accommodating an ignition plug 7. A burner head 3 comprises a pair of second side walls 38 abutting against the outer side faces of the two first side walls 24 of the ignition plug accommodation part 20, and a second rear wall 39 opposing the deep side face of the first rear wall 25, thereby to provide an ignition part 35 covering over the ignition plug 7. The lower face of the ignition part 35 and the upper end face of the first rear wall 25 are caused to abut thereby to form an ignition flame port 40. Between the first rear wall 25 and the second rear wall 39, there is formed an ignition gas guide passage 42 for feeding the mixed gas of a distribution chamber 34 to the ignition flame port 40.

Description

  The present invention relates to a burner for a stove used for a gas stove.

  This type of stove burner includes a mixing tube that supplies a mixed gas of fuel gas and primary air, a burner body that is connected to the mixing tube and has a distribution chamber formed therein, and is mounted on the burner body. A main flame hole (referred to herein as a flame hole for forming a cooking and heating flame composed of a plurality of flame holes having different shapes and sizes) and an ignition flame hole are formed along the outer periphery. And a spark plug for generating a spark discharge in the vicinity of the ignition flame hole.

  And in this kind of stove burner, one in which a spark plug is housed in a part of the outer peripheral portion of the burner body is known (see Patent Document 1 below). By accommodating the spark plug in a part of the burner body, the upper part of the spark plug is covered with a part of the burner head. Further, an ignition flame hole is formed on the back side of the portion of the burner body that accommodates the spark plug.

  Thereby, compared with the case where an ignition plug is arrange | positioned on the outer side of a burner body, adhesion of the simmered juice to an ignition plug or an ignition flame hole can be decreased.

  By the way, the main flame hole and the ignition flame hole are grooves formed on the outer periphery of the lower surface of the burner head or the upper surface of the burner head, and are formed when the burner head is placed on the burner body. The ignition flame hole is shaped so as to limit the mixed gas to a relatively small amount optimal for ignition in order to form a smaller ignition flame than the main flame hole.

JP-A-4-64807

  In this type of stove burner, a so-called burner head floating may occur between the burner head and the burner body due to the inclusion of foreign matter. In this case, in the configuration in which the mixed gas is limited to an appropriate amount by the ignition flame hole as in the conventional case, if the groove of the ignition flame hole is slightly opened due to the floating of the burner head or the like, the mixed gas is limited by the ignition flame hole. Becomes insufficient, and a large flame for ignition is formed. For this reason, there is a possibility that excessive scoring of the spark plug occurs and damages. Furthermore, if the supply amount of the mixed gas for ignition becomes excessive, the consumption amount of the fuel gas increases, which is uneconomical.

  In view of the above-described points, an object of the present invention is to provide a stove burner that can optimally maintain the supply of a mixed gas for ignition without being substantially affected by floating of the burner head or the like.

  In order to achieve this object, the present invention provides a mixing tube that generates a mixed gas of fuel gas and primary air, and a cylindrical burner that is connected to the mixing tube and forms a distribution chamber for the mixed gas inside. A burner for a stove comprising a body, a burner head mounted on the burner body to form a number of main flame holes on the outer periphery, and a spark plug for igniting the flame holes, wherein the burner body comprises the An annular mounting portion for mounting the burner head; and an ignition plug housing portion that accommodates the spark plug and is open at an upper end thereof, and the burner head includes a spark plug housing portion that is accommodated in the spark plug housing portion. An ignition part is provided that covers the upper part with a predetermined gap, and the spark plug housing part includes a first pair of first side walls opposed to each other in the circumferential direction of the burner body, and a first continuous to the inner ends of the first side walls. And the ignition part is provided with a rear wall. A pair of second side walls extending downwardly in contact with the outer side surfaces of the first side walls of the spark plug housing portion and a rear end of the second side walls are formed on the inner side surface of the first rear wall. A second rear wall facing and extending downward, and when the ignition part covers the upper part of the spark plug housing part, the lower surface of the ignition part and the upper end surface of the first rear wall come into contact with each other. An ignition flame hole is formed in the contact portion, and an ignition gas guide path for supplying the mixed gas in the distribution chamber to the ignition flame hole is formed between the first rear wall and the second rear wall. It is characterized by being.

  According to the present invention, the first side wall and the first rear wall of the spark plug housing part are surrounded from the outside by the second side wall and the second rear wall that extend downward in the ignition part of the burner head, and the spark plug housing part An ignition gas guide path for guiding the mixed gas to the ignition flame hole is formed between the first rear wall and the second rear wall of the ignition unit. Thus, the mixed gas in the distribution chamber is supplied to the ignition flame hole only through the ignition gas guide path. In the ignition gas guide path, the cross-sectional area of the flow path depending on the distance between the first rear wall and the second rear wall can be made to correspond to the supply amount of the mixed gas optimum for ignition.

  With the above configuration, if the burner head floats or the like, the second side wall and the second rear wall maintain the state surrounding the first side wall and the first rear wall and move upward (in the axial direction of the burner head). Only the position shifts, and the mixed gas does not enter from inside the ignition portion except from the ignition gas guide path. In addition, even if the burner head floats or the like, the second rear wall only slides upward with respect to the first rear wall, so that ignition is performed according to the distance between the first rear wall and the second rear wall. The cross-sectional area of the gas guide path for the gas hardly changes. Therefore, unlike the case of adopting a configuration in which the amount of the mixed gas required for ignition by the ignition flame hole is limited, the supply of the mixed gas for ignition is optimally affected almost without the influence of the float of the burner head. Thus, excessive sparking of the spark plug and an increase in fuel gas consumption due to the ignition flame can be prevented.

  By the way, if the flame is surely formed in the ignition flame hole, the amount of the mixed gas supplied to the ignition flame hole by the ignition gas guide path can be extremely limited. However, for example, in a small stove burner having a small number of main flame holes, the amount of fuel gas supplied to the mixing pipe is small overall. In such a small stove burner, if the amount of the mixed gas is limited to the minimum amount at which an ignition flame is formed, the flame formed by the ignition flame hole becomes extremely small, and the flame moves to the main flame hole. It is conceivable that the performance is lowered.

  Therefore, in the present invention, when the ignition part covers the ignition plug housing part above, the ignition flame hole from the ignition gas guide path between the ignition flame hole and the side surface of the second side wall. A fire transfer hole that forms a flame for transfer of fire is formed using a part of the mixed gas that is directed to the flame, and the flame of the transfer flame hole is connected to the upper end surface of the first side wall and the second side wall. It is preferable that a flame transfer lead-out portion led out radially outward of the burner head is formed along an upper corner portion of the ignition portion constituted by a side surface.

  In the present invention, a fire transfer flame hole is formed on the side of the ignition flame hole in a state where the ignition part covers the upper side of the spark plug housing part, and a fire transfer flame deriving unit is formed in the upper corner inside the ignition part. Is formed. When the ignition flame hole is ignited because the fire transfer flame hole is formed inside the ignition portion, a flame is formed together with the ignition flame hole. At this time, the mixed gas supplied to the flame transfer hole is a part of the mixed gas that is directed from the ignition gas guide path toward the ignition flame hole. The amount does not increase.

  The flame formed by the flame-transfer flame hole is guided to the outside in the radial direction of the burner head through the flame-transfer flame deriving portion. Usually, the flame has the property of extending along the wall surface. Since the flame transfer flame deriving section is composed of the upper end surface of the first side wall and the side surface of the second side wall, the flame formed by the flame transfer flame hole can be reliably led out to the outside of the burner head. And the flame for the fire transfer led out of the burner head is transferred to the main flame hole adjacent to the ignition part.

  Thus, according to the present invention, it is possible to improve the transferability of the gas from the igniter to the main flame hole without increasing the amount of gas mixture supplied to the ignition flame hole, and the amount of fuel gas supplied is Even a small stove burner with a small overall size can be transferred smoothly.

  Further, in the present invention, a fire-transfer flame guide part that guides the flame for fire transfer led out radially outside the burner head toward the main flame hole adjacent to the ignition part is provided in the fire-transfer flame lead-out part. It is preferable to provide it. According to this, the flame for fire transfer led out to the outside of the burner head by the fire transfer flame deriving unit is directed to the main flame hole through the fire transfer flame guiding unit, and therefore, from the ignition unit to the main flame hole. The fire transfer property can be further improved.

The side view which shows the burner for stove of embodiment of this invention. Sectional drawing of the principal part of the burner for stove. The perspective view which shows a spacer. The perspective view which shows the bottom face of a burner head. Explanatory drawing which fractured | ruptured a part of ignition part and planarly viewed the spark plug accommodating part. Explanatory sectional drawing of an ignition part and a spark plug accommodating part. The front view of the principal part of a burner head.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the stove burner of the present embodiment includes a mixing tube 1, a burner body 2, a burner head 3, and a burner cap 4.

  The mixing tube 1 generates a mixed gas of the fuel gas and the primary air by taking in the fuel gas ejected from a gas nozzle (not shown) together with the primary air.

  As shown in FIG. 2, a burner body 2 is connected to the downstream end of the mixing tube 1. The burner body 2 includes a base portion 5 formed of a metal plate material and a spacer 6 formed of die casting. A spark plug 7 is provided inside the spacer 6.

  The base portion 5 of the burner body 2 includes an outer cylinder 8 and an inner cylinder 9 provided inside the outer cylinder 8, and an annular space formed between the outer cylinder 8 and the inner cylinder 9 is a mixing tube. 1 is formed.

  As shown in FIG. 2, the outer cylinder 8 of the base portion 5 is provided eccentrically in a direction in which the side on which the spark plug 7 is disposed approaches the inner cylinder 9. The base portion 5 is formed with an annular bottom raised portion 11. The lower end of the inner cylinder 9 is connected to the upper end of the bottom raised portion 11.

  As shown in FIGS. 2 and 3, the spacer 6 is connected to the base portion 5 in a state where the upper end of the outer cylinder 8 is inserted into a connecting portion 13 which is a communication opening formed in the bottom portion 12. The spacer 6 includes an annular placement portion 14 on which the burner head 3 is placed on the upper end surface.

  As shown in FIG. 1, the spacer 6 is exposed from the top plate 15 that closes the upper surface of the stove body (not shown). A burner opening 16 is formed in the top plate 15, and an annular closing plate 17 that closes a gap formed between the burner opening 16 and the spacer 6 is provided. In addition, the virtues 18 are placed on the top plate 15 on the outer periphery of the closing plate 17.

  Since the spacer 6 is formed by die casting, it is suitable for exposing from the top plate 15 because of its high aesthetics and high deformation strength.

  As shown in FIGS. 2 and 3, a spark plug housing portion 20 for housing the spark plug 7 is provided inside the outer peripheral wall 19 of the spacer 6. The spark plug housing portion 20 is a vertically long space formed along the inner surface of the outer peripheral wall 19 of the spacer 6, and the upper end thereof is opened so as to cross a part of the mounting portion 14. This opening is a plug opening 26 described later.

  As shown in FIG. 3, the spark plug 7 is housed inside the spark plug housing portion 20 in such a posture that the electrode side at the upper end thereof is inclined toward the back side of the spark plug housing portion 20. Thereby, even if the length dimension from the upper end to the lower end of the spark plug 7 is relatively large, the spark plug 7 can be accommodated inside the spark plug accommodating portion 20 while suppressing the dimension in the height direction. 7 can be stored at a position lower than the upper edge of the spark plug housing portion 20.

  As shown in FIG. 2, the spark plug housing portion 20 is provided in a relatively wide space formed by decentering the outer cylinder 8 of the base portion 5 with respect to the inner cylinder 9. The spark plug 7 is attached to the spacer 6 by being screwed to a support piece 21 extending downward from a part of the outer peripheral wall 19 of the spacer 6.

  In the present embodiment, as shown in FIG. 3, a thermocouple 22 is incorporated at a position adjacent to the spark plug housing portion 20 of the spacer 6. The thermocouple 22 is supported by the spacer 6 via a support member 23 that is partially shown in FIG.

  As shown in FIGS. 2 and 3, the spark plug housing portion 20 includes a pair of vertical wall portions 24 (first side walls) facing each other at a predetermined interval in the circumferential direction of the mounting portion 14, and both vertical walls. A back wall portion 25 (first rear wall) continuous to the back side of the portion 24 is provided, and a plug opening 26 that opens above the spark plug 7 is formed at the upper end thereof. Further, a flat surface 27 is formed at the upper end of the back wall portion 25 located on the back side of the plug opening 26, and the upper surface of the spacer 6 is located outside the plug opening 26 (outside in the radial direction of the spacer 6). A protruding line 28 is provided that protrudes upward from the plug and is curved along the outer peripheral edge of the plug opening 26.

  Since the spark plug 7 is accommodated in the spark plug accommodating portion 20, even when the burner head 3 is removed during cleaning or the like as shown in FIG. It does not protrude from the plug opening 26. Thereby, it does not accidentally contact the spark plug 7 at the time of cleaning or the like, and the damage of the electrode of the spark plug 7 can be surely prevented.

  Further, the ridges 28 formed along the outer peripheral edge of the plug opening 26 of the spark plug housing portion 20 block the squeezed juice that has flowed to the outside of the placement portion 14 of the spacer 6. Thereby, it is difficult for the boiled juice to flow into the spark plug housing 20.

  As shown in FIG. 4, the burner head 3 is formed in an annular shape, and includes an annular wall 29 that is suspended from the outer periphery of the lower surface thereof. A large and small number of grooves are formed in the annular wall 29, and the large and small numbers are formed along the outer periphery of the burner head 3 when these grooves contact the mounting portion 14 of the spacer 6 as shown in FIG. 2. The cooking flame hole 30 (main flame hole) is formed. The cooking flame holes 30 having different shapes and sizes are provided in an arrangement suitable for flame formation.

  A drooping cylinder 31 concentric with the annular wall 29 is provided on the inner periphery of the burner head 3. As shown in FIG. 2, the hanging cylinder 31 is inserted into the inner cylinder 9 of the base portion 5 of the burner body 2 when the burner head 3 is placed on the placement portion 14 of the spacer 6. At this time, the drooping cylinder 31 and the inner cylinder 9 form a hollow portion 32 that vertically penetrates the central portion of the burner body 2 and the burner head 3. In the hollow portion 32, a pan bottom temperature sensor 33 is provided. An annular burner cap 4 is provided on the upper part of the burner head 3 to prevent foreign matter from entering the hollow portion 32.

  An annular space formed between the hanging cylinder 31 of the burner head 3 and the inner surface of the spacer 6 constitutes a distribution chamber 34 communicating with the mixed gas passage 10. The mixed gas that has entered the distribution chamber 34 from the mixing tube 1 through the mixed gas passage 10 is distributed in the circumferential direction of the burner head 3 and is ejected from the cooking flame hole 30.

  Further, the burner head 3 is formed with an ignition part 35 that covers the upper side of the ignition plug 7 accommodated in the ignition plug accommodation part 20. Furthermore, the burner head 3 is formed with an overhang portion 36 that continuously extends from the ignition portion 35 and extends radially outward of the burner head 3.

  As shown in FIG. 4, the overhang portion 36 includes an upper wall 43 facing the upper side of the spark plug housing portion 20, and a pair of side hanging walls extending downward from both circumferential edges of the burner head 3 in the upper wall 43. 44 and a front drooping wall 45 extending downward from the leading edge of the upper wall 43 in the projecting direction. Since the upper part of the spark plug housing part 20 is covered by the overhang part 36, the infiltration of the simmered juice into the inside of the ignition part 35 and the inside of the spark plug housing part 20 is reliably prevented.

  As shown in FIGS. 2 and 4, the ignition portion 35 has a contact surface 37 (contact portion) that contacts the flat surface 27 formed on the upper surface of the back wall portion 25 of the spark plug housing portion 20 on the back surface thereof. And a pair of side wall portions 38 (second side walls) extending downward from both sides of the contact surface 37. Further, the both side wall portions 38 of the igniter 35 are continuous from the hanging cylinder 31 at the back end edge, and a part of the hanging cylinder 31 located between the both side walls 38 is the rear wall of the igniting section 35. A portion 39 (second rear wall) is provided.

  When the burner head 3 is mounted on the mounting portion 14 of the spacer 6, the both side wall portions 38 of the ignition portion 35 are respectively outside the vertical wall portions 24 of the spark plug housing portion 20 as shown in FIG. 5. The rear wall part 39 of the ignition part 35 faces the back wall part 25 of the spark plug housing part 20 with a gap.

  Further, as shown in FIG. 4, the contact surface 37 of the igniter 35 has a plurality of grooves to be the ignition flame holes 40, a pair of grooves to be the fire transfer flame holes 46, and a discharge projection by a protrusion protruding downward. A target 41 is formed.

  As shown in FIG. 6, when the contact surface 37 contacts the flat surface 27 of the spark plug housing 20, the ignition flame hole 40 and the fire transfer flame hole 46 are formed on the contact surface 37. The fire transfer flame hole 46 is formed between the ignition flame hole 40 and the inner side surface 38 a of the side wall portion 38.

  As shown in FIGS. 2 and 5, the mixed gas in the distribution chamber 34 is exchanged with the ignition flame hole 40 by a gap between the rear wall portion 39 of the ignition portion 35 and the back wall portion 25 of the spark plug housing portion 20. An ignition gas guide path 42 to be supplied to the flame transfer flame hole 46 is formed. In the ignition gas guide path 42, the flow path cross-sectional area based on the distance between the rear wall portion 39 of the ignition portion 35 and the back wall portion 25 of the spark plug housing portion 20 is the optimum gas supply amount for ignition. It corresponds.

  The side wall portion 38 of the ignition portion 35 is in airtight contact with the outer side of the vertical wall portion 24 of the spark plug housing portion 20, so that the mixed gas in the distribution chamber 34 is lit only via the ignition gas guide path 42. It is supplied to the flame hole 40.

  In the unlikely event that the burner head 3 floats (a slight gap is formed between the burner body 2), the spark plug housing portion 20 vertical wall portion 24 and the side wall portion 38 of the ignition portion 35 are in contact with each other. Since the contact state is maintained, the mixed gas does not enter from other than the ignition gas guide path 42. In addition, even if the burner head 3 is lifted, the rear wall portion 39 of the ignition portion 35 is merely displaced in the height direction with respect to the back wall portion 25 of the spark plug housing portion 20. The cross-sectional area of the channel hardly changes. As a result, the supply of the mixed gas for ignition can be optimally maintained with almost no influence of the floating of the burner head 3, and excessive sparking of the spark plug 7 due to the flame from the ignition flame hole 40 or fuel An increase in gas consumption can be prevented.

  In addition, as shown in part in FIG. 6, an upper top portion of the ignition unit 35 along the direction in which the mixed gas is blown out from the fire transfer flame hole 46 has an inner top surface of the ignition unit 35 and a spark plug housing unit. A fire flame deriving portion 47 is formed by the upper end surface 24 a of the vertical wall portion 20 and the inner side surface 38 a of the side wall portion 38 of the ignition portion 35. The fire transfer flame deriving unit 47 guides the flame of the fire transfer flame hole 46 to the radially outer side of the burner head 3.

  Furthermore, as shown in FIG. 7, a fire transfer flame guide 48 is formed between the ignition unit 35 and the cooking flame hole 30 by cutting out the outer end of the side wall 38 of the ignition unit 35. Yes.

  The fire transfer flame hole 46 forms a flame together with the ignition flame hole 40 by igniting the ignition flame hole 40. At this time, a part of the mixed gas from the ignition gas guide path 42 toward the ignition flame hole 40 is supplied to the flame transfer flame hole 46. Therefore, even if the flame transfer hole 46 is provided, the amount of the mixed gas supplied through the ignition gas guide path 42 for ignition does not increase.

  The flame at the flame transfer flame hole 46 is guided by the flame transfer flame deriving portion 47 and travels outward in the radial direction of the burner head 3. At this time, the fire transfer flame deriving portion 47 includes the inner top surface of the ignition portion 35, the upper end surface 24a of the vertical wall portion 24 of the spark plug housing portion 20, and the inner side surface 38a of the side wall portion 38 of the ignition portion 35. Thus, the property of the flame extending along the wall surface can be used, and the flame for transferring the fire can be smoothly led out to the outside of the burner head 3.

  The flame led out to the outside of the burner head 3 is further guided toward the cooking flame hole 30 by the flame transfer flame guide 48. As a result, the mixed gas ejected from the cooking flame hole 30 can be reliably transferred to the fire, and the fire transfer property is further improved.

  In addition, since the flame transfer part 47 is formed in the ignition part 35, the flame for the flame transfer can be surely transferred to the outside of the burner head 3 even if the flame formed by the ignition flame hole 40 is kept small. Can be derived. Thereby, since it is not necessary to make the flame of the ignition flame hole 40 large, it is possible to prevent excessive sparking of the spark plug 7 and to reduce the amount of fuel gas used for ignition. And since the structure of the ignition part 35 of this embodiment can obtain favorable fire transfer property even if there is little quantity of the fuel gas used for ignition, for example, the quantity of the supplied fuel gas is entirely It can be suitably used for a small-sized stove burner.

  DESCRIPTION OF SYMBOLS 1 ... Mixing pipe, 2 ... Burner body, 3 ... Burner head, 7 ... Spark plug, 14 ... Mounting part, 20 ... Spark plug accommodating part, 24 ... Vertical wall part (1st side wall), 25 ... Back wall part ( 1st rear wall), 30 ... Cooking flame hole (main flame hole), 34 ... Distribution chamber, 35 ... Ignition part, 37 ... Contact surface (contact part), 38 ... Side wall part (second side wall), 39 ... rear wall (second rear wall), 40 ... ignition flame hole, 42 ... ignition gas guide path, 46 ... fire transfer flame hole, 47 ... fire transfer flame deriving part, 48 ... fire transfer flame guide part.

Claims (3)

A mixing tube that generates a mixed gas of fuel gas and primary air, a cylindrical burner body that is connected to the mixing tube and forms a distribution chamber of the mixed gas inside, and is placed on the burner body In a burner for a stove comprising a burner head that forms a number of main flame holes on the outer periphery, and an ignition plug for igniting the flame holes,
The burner body includes an annular placement portion for placing the burner head, and a spark plug housing portion that houses the spark plug and has an upper end opened.
The burner head includes an ignition part that covers a predetermined gap above the spark plug accommodated in the spark plug accommodation part,
The spark plug housing portion includes a pair of first side walls opposed to the circumferential direction of the burner body, and a first rear wall continuous to the inner ends of the first side walls,
The ignition part is formed continuously from a pair of second side walls extending in contact with the outer side surfaces of the first side walls of the spark plug housing part and the rear ends of the second side walls, and A second rear wall extending downward facing the back side of the wall,
When the ignition part covers above the spark plug housing part, the lower surface of the ignition part and the upper end surface of the first rear wall come into contact to form an ignition flame hole in the contact part, and A stove burner characterized in that an ignition gas guide path for supplying the mixed gas in the distribution chamber to the ignition flame hole is formed between the first rear wall and the second rear wall. The stove burner according to claim 1, wherein
A part of the mixed gas from the ignition gas guide path toward the ignition flame hole between the ignition flame hole and the side surface of the second side wall when the ignition part covers the ignition plug housing part. A fire-transfer flame hole is formed which forms a flame for fire-transfer using the above, and the flame of the fire-transfer flame hole is constituted by the upper end surface of the first side wall and the side surface of the second side wall. A stove burner characterized in that a fire transfer flame lead-out portion is formed along the upper corner of the ignition portion to be led out in the radial direction of the burner head. In the stove burner according to claim 2,
The fire-transfer flame deriving unit includes a fire-transfer flame guide unit that guides a flame for fire transfer led out radially outside the burner head toward a main flame hole adjacent to the ignition unit. Burner.