JP2011133124A - Gas burner for cooking stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve insufficient supply of secondary air for combustion to an upper side of a burner port, and to provide good combustion by preventing mixing of a combustion exhaust gas into the secondary air for combustion supplied to the upper side of the burner port. <P>SOLUTION: In this gas burner 1 for a cooking stove, an air-intake 8 for taking the secondary air for combustion is formed on a part of an outer peripheral wall 4a of a hollow annular burner head section 3 on a position separating from the burner port 7 at a lower side of the burner port 7. A gas passage 10 for guiding a premixed gas from a mixing pipe 2 to the burner port 7, is formed on an inner peripheral side of the burner head section 3, and a secondary air passage 9 is formed to guide the secondary air for combustion, taken from the air intake 8 to an upper side of the burner port 7 through a top face of a burner cap 6 from an inner peripheral side of the burner cap 6 by the passage different from the gas passage 10. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a stove gas burner, and more particularly to a stove gas burner that supplies secondary combustion air from both upper and lower sides of a flame hole.

  Conventionally, in this type of stove gas burner, the burner body is formed in a hollow ring shape, and the air in the gas cooker casing passes through the inner circumferential space surrounded by the burner body in the combustion portion of the air-fuel mixture ejected from the flame hole. Thus, it is supplied as secondary air for combustion.

  On the other hand, in an external flame type burner, a flame hole is formed in the outer peripheral part of the burner cap, and air is supplied to the flame forming part from the outside of the burner. It is desirable to supply the combustion secondary air from the upper surface of the burner cap to the upper side of the flame forming portion via the side space. That is, in the external flame type burner, it is desired to supply the combustion secondary air from the upper side via the inner circumferential space of the burner.

  However, in the case where the air in the gas cooker casing is supplied via the inner circumferential space of the burner surrounded by the burner body, when the spillage occurs, the cooked food is gas cooked through the inner circumferential space of the burner. There is a problem that it falls into the container casing.

  As a stove gas burner that has solved such a problem, the one described in Patent Document 1 is known. The burner body of this burner includes a circumferentially extending case portion erected on the upper surface of the base plate portion, and a first flame hole (for combustion) and a second flame hole (ignition) through the internal space of the case portion. Air-fuel mixture is supplied. The case portion is divided at at least one location in the circumferential direction of the base plate portion, and a gap portion where no case portion exists is provided. The burner cap is formed so as to cover the case portion and the gap portion from above. Then, air outside the burner is supplied from the upper surface of the burner cap to the upper side of the flame forming portion via the inner space of the burner from the gap portion.

JP 2008-202874 A

  However, in the conventional example shown in Patent Document 1 above, since the second flame hole exists in the vicinity of the gap portion, when the flame is formed in the second flame hole, the formation of the flame is not performed. For the air to be consumed. At that time, there is a risk that the air supplied from the gap portion to the upper portion of the flame forming portion via the inner circumferential space of the burner is insufficient, resulting in poor combustion.

  Furthermore, the following influence is considered by presence of the 2nd flame hole arrange | positioned in a space | gap part.

  (1) The exhaust gas component of the flame formed in the second flame hole is mixed into the air supplied from the gap through the inner circumferential space of the burner, which may adversely affect the combustion of the flame hole. .

  (2) When a pan bottom sensor for detecting the bottom temperature of the temperature cooking container is provided in the inner circumferential side space of the burner, the gap from the gap portion to the inner circumferential side space of the burner is formed by the flame formed in the second flame hole. The supplied air is heated, which may hinder temperature detection by the pan bottom sensor.

  In addition, in order to avoid the said bad influence, when the heating amount by a 2nd flame hole is made small, for example, another problem that the fire transfer performance to a 1st flame hole worsens arises.

  The present invention has been made in view of the above-described conventional problems. The object of the present invention is to solve the shortage of supply of combustion secondary air to the upper side of the flame hole and to supply the upper side of the flame hole. An object of the present invention is to provide a gas burner for a stove that can prevent combustion exhaust gas from being mixed into the secondary air for combustion and realize good combustion.

  In order to solve the above-described problems, the present invention is characterized by the following configurations.

  A mixing pipe 2 to which a premixed gas of fuel gas and primary air for combustion is supplied, and a hollow annular burner head portion 3 that is arranged exposed above the top plate 12 that covers the upper surface of the gas cooker casing 21; A hollow annular burner cap 6 detachably mounted on the upper end surface of the burner head portion 3, and the circumference of the burner cap 6 between the outer peripheral portion of the burner cap 6 and the upper end surface of the burner head portion 3. It is a gas burner for a stove formed by arranging a large number of flame holes 7 in the direction. An air intake port 8 for taking in the secondary air for combustion is formed in a part of the outer peripheral wall 4 a of the hollow annular burner head portion 3 at a position below the flame hole 7 and spaced from the flame hole 7. Form. A gas passage 10 that guides the premixed gas from the mixing pipe 2 to the flame hole 7 is provided on the inner peripheral side of the burner head portion 3, and the combustion secondary air that is taken in from the air intake port 8 is supplied to the gas passage 10. A secondary air passage 9 for guiding the burner cap 6 from the inner peripheral side of the burner cap 6 to the upper side of the flame hole 7 via the upper surface of the burner cap 6 is provided.

  By adopting such a configuration, by providing the air intake port 8 disposed below the flame hole 7 and at a position separated from the flame hole 7, the air from the outside of the burner is drawn. The air flow toward the lower side of the flame hole 7 and the air flow toward the upper side of the flame hole 7 from the upper surface of the burner cap 6 through the secondary air passage 9 from the air intake port 8. The combustion secondary air is sufficiently supplied from both the upper and lower sides of the flame hole 7. Moreover, since no flame is formed in the vicinity of the air intake 8 that is separated from the flame hole 7, the combustion secondary air passing through the secondary air passage 9 is consumed in the vicinity of the air intake 8. In addition, the exhaust gas component of the flame can be prevented from being mixed into the combustion secondary air.

  Moreover, it is preferable to provide a partition wall 11 projecting from the space between the flame hole 7 and the air intake port 8 toward the radially outer side D of the burner head portion 3 on the outer peripheral wall 4 a side of the burner head portion 3. In this case, by dividing the flame hole 7 and the air intake 8 by the partition wall 11, it is possible to prevent the temperature of the air taken into the air intake 8 from rising due to the heat generated in the vicinity of the flame hole 7. Furthermore, it is possible to simultaneously prevent a shortage of air taken into the air intake 8 due to the rising air flow generated in the vicinity of the flame hole 7.

  Moreover, the five virtues 13 mounted on the top surface of the top plate 12 are provided. The five virtues 13 join the plural virtue claw parts 14 and the respective five virtue claw parts 14 and the inner peripheral side end part 15b of the burner head part 3. An annular virtuosity frame portion 15 that abuts along the outer peripheral wall 4a, and the outer peripheral side end portion 15a of the virtuosity frame portion 15 is lifted from the top surface of the top plate 12 so that the air intake 8 It is preferable that the five virtue frame portions 15 function as the partition walls 11 by forming the ventilation gaps 35 communicating with each other. In this case, since the five virtue frame portion 15 can be used as the partition wall 11, there is no need to separately provide a member constituting the partition wall 11, and the partition wall 11 can be configured with a simple structure by reducing the number of parts. Moreover, it can be easily cleaned by removing the virtues 13.

  In addition, a pan bottom sensor 17 for measuring the pan bottom temperature and a sensor column 18 for supporting the pan bottom sensor 17 so as to be movable up and down are provided at a position facing the secondary air passage 9, and the sensor column 18 is connected to the secondary air channel 9. It is preferable that the column through hole 19 provided in the bottom surface portion 9a is fixed in a watertight manner. In this case, the air taken into the secondary air passage 9 from the air intake 8 is not affected by the heat from the flame of the flame hole 7, so that the detection accuracy of the pan bottom sensor 17 can be improved. Further, since the sensor column 18 is fixed in a watertight manner to the bottom surface portion 9 a of the secondary air passage 9, the broth spilled into the secondary air passage 9 is dropped into the gas cooker casing 21. Can be prevented.

  According to the present invention, a flame is formed in the vicinity of the air intake port by forming the air intake port communicating with the secondary air passage at a position lower than the flame hole and separated from the flame hole. This eliminates the shortage of combustion secondary air supplied to the upper side of the flame hole via the secondary air passage, and combustion exhaust gas is mixed in the secondary air for combustion supplied to the upper side of the flame hole. As a result, good combustion is possible.

It is an example of an embodiment of the present invention, and is a side sectional view of a state where a gas burner for a stove is incorporated in a gas cooker. It is a disassembled perspective view which shows the gas burner for stoves same as the above. It is a perspective view of the state which removed the burner cap from the burner head part same as the above. It is a fracture | rupture perspective view of a burner head part same as the above. It is a perspective view of five virtues used for the gas burner for stove same as the above. It is a perspective view of the state which mounted the virtues same as the above in the position which surrounds the burner head part on the top plate of a gas cooker. It is a side view at the time of installing the gas cooker same as the above in a kitchen counter. It is a top view of a gas cooker same as the above.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  An example in which the stove gas burner 1 of the present invention is used in a gas cooker 20 will be described based on an embodiment shown in the accompanying drawings.

  FIG. 7 shows a side view when the gas cooker 20 is installed on the kitchen counter 22, and FIG. 8 shows a plan view. The gas cooker 20 includes three gas stoves 1 </ b> A to 1 </ b> C on the top plate 12 that covers the upper opening of the gas cooker casing 21. The top plate 12 is made of, for example, a glass plate 12a.

  The three gas stoves 1A to 1C include a large thermal power burner 1A, a standard thermal power burner 1B, and a small thermal power burner 1C. The large thermal power burner 1A, the standard thermal power burner 1B, and the small thermal power burner 1C have basically the same structure, and the stove gas burner 1 applied to the large thermal power burner 1A will be described below.

  As shown in FIGS. 1 and 2, the stove gas burner 1 of the present example includes a mixing tube 2 to which a premixed gas F of fuel gas and primary combustion air is supplied, a hollow annular burner head body 4, and An external flame type burner mainly composed of a burner base 5 detachably mounted on the burner head body 4 and a hollow annular burner cap 6 detachably mounted on the burner base 5. is there.

  In the case of this example, the mixing tube 2, the burner base 5 and the burner cap 6 are each made of an aluminum die cast product such as ADC12.

  The mixing tube 2 is configured by joining a lower mixing tube portion 2a and an upper mixing tube portion 2b with screws or the like.

  The burner head section 3 is an annular burner base on which a burner head body 4 and a burner cap 6 are detachably mounted and are exposed above the top plate 12 covering the upper surface of the gas cooker casing 21. The burner base 5 is separable from the burner head main body 4.

  An annular burner ring 30 (see FIG. 1) is interposed between the burner head body 4 and the opening hole of the top plate 12. Specifically, the burner ring 30 and the top plate 12 are fixed in a watertight structure via a packing (not shown) provided on the burner ring 30, and the burner head body 4 and the burner ring 30 are provided on the burner head body 4. It is fixed in a watertight structure via a packing (not shown). That is, the burner head main body 4 and the top plate 12 are fixed in a watertight structure to prevent the soup from dropping from the top plate 12.

  A large number of radial grooves are formed in the lower surface side of the burner cap 6 at intervals in the circumferential direction, and the burner cap 6 is placed on the burner base 5 at the lower end on the outer periphery side of the burner cap 6. A large number of flame holes 7 are formed at intervals in the circumferential direction.

  As shown in FIG. 1, the premixed gas F obtained by mixing the fuel gas ejected from the nozzle 61 and the primary combustion air 62 enters the mixing tube 2 from the throat portion 63, and enters the upper mixing tube portion 2b. A space (see FIG. 3) that is led to a mixing tube opening 2c (see FIG. 2) that opens at three locations at the top of the tip of the gas pipe and that further becomes a gas passage 10 positioned below the burner cap 6 placed on the burner base 5. All of the burner caps 6 placed on the burner base 5 via the concave portions 60 (see FIG. 4) formed in the circumferential direction on the upper end side of the burner base 5. It is ejected from the flame hole 7 and ignited by a spark from the spark plug 31 (see FIG. 6), and a flame is formed outside the flame hole 7.

  On the outer peripheral wall 4a of the burner head main body 4, as shown in FIG. 2, concave grooves 32 opened upward are formed at three locations spaced in the circumferential direction. By placing the burner base 5 on the upper surface of the burner head body 4, the burner base insertion portion 33 protruding from the lower part of the burner base 5 is inserted into the insertion opening 33 a formed on the upper part of the burner head body 4 from above. As a result, the upper surface openings of the three concave grooves 32 are respectively closed by the lower surface of the burner base 5, so that the lower side of the flame hole 7 and the position away from the flame hole 7 Two air intakes 8 are formed at intervals in the circumferential direction.

  A secondary air passage 9 having one end communicating with the air intake 8 is provided in the inner peripheral space of the burner head body 4. As shown in FIG. 4, the secondary air passage 9 passes through the inner peripheral side of the burner base 5 and the inner peripheral side of the burner cap 6 from the space portion partitioned from the mixing tube opening 2 c (see FIG. 2). The burner cap 6 is opened upward. Thereby, the air taken in from the air intake 8 is not mixed with the premixed gas from the mixing tube opening 2c, and passes through the secondary air passage 9 as shown by the arrow A in FIG. The secondary air for combustion is supplied from the upper surface of the cap 6 to the upper side of the flame hole 7, that is, above the flame C.

  As shown in FIG. 6, the virtues 13 are detachably mounted on the top plate 12 of the gas cooker 20 so as to surround an opening hole for inserting the burner head body 4 provided on the top plate 12. Is done. Specifically, as shown in FIG. 5, the virtues 13 include six virtues claw portions 14 each having an outer shape formed in a substantially U shape and a leg protrusion formed on the lower end on the outer peripheral side. It is composed of five virtue frame portions 15 for holding the six virtue claw portions 14 as one integral virtue 13 by joining the lower end sides by welding or the like. A cooking tool such as a pot on the virtuosity nail portion 14 with the virtuosity frame portion 15 fitted on the burner base 5 and the legs projecting from the lower end on the outer peripheral side of the virtuosity claw portion 14 set on the top plate 12. Is placed.

  The five virtue frame portions 15 of this example are composed of the upper combustion secondary air flow passing through the secondary air passage 9 indicated by the arrow A in FIG. 1 and the lower combustion secondary air indicated by the arrow B in FIG. It also acts as a partition wall 11 for smoothly separating the flow.

  Here, the five virtue frame portions 15 have a cross-sectional shape projecting in a hook shape toward the radially outer side of the burner head body 4 (arrow direction D in FIG. 1). The five virtue frame portion 15 functions as a partition wall 11 that partitions the flame hole 7 and the air intake port 8. That is, as shown in FIG. 6, the inner peripheral side end portion 15b of the five virtue frame portion 15 is fitted on the outer peripheral surface of the burner base 5, and the outer peripheral side end portion 15a is connected to the burner as shown in FIG. The head end 4 is inclined downward as it is farther from the outer peripheral wall 4 a of the head body 4, and the outer peripheral side end 15 a is arranged so as to float from the top surface of the top plate 12. The air flows into the air intake 8 through the ventilation gap 35 formed on the lower surface side. Here, due to the influence of the draft due to the flame, an upward air flow is generated upward from the ventilation gap 35 → the air intake 8 → the secondary air passage 9 → the burner cap 6, so that the air from the ventilation gap 35 is Inflow is promoted.

  As shown in FIG. 1, a pan bottom sensor 17 for measuring the pan bottom temperature and a pan bottom sensor 17 can be moved up and down at the center of the hollow annular burner head body 4 so as to face the inside of the secondary air passage 9. A supporting sensor column 18 is provided. The pan bottom sensor 17 is attached to the sensor column 18 so as to be urged upward by a spring 36. The vertical position of the pan bottom sensor 17 is such that when the pan is not placed on the virtues 13, the position of the upper end of the pan bottom sensor 17 is higher than the position of the upper ends of the virtuous claws 14, and When the pan is placed on the pot bottom sensor 17, a force larger than the urging force of the spring 36 acts on the pan bottom sensor 17 in the downward direction, so that the upper end position of the pan bottom sensor 17 is lower than the upper end position of the virgin claw portion 14. The pan bottom sensor 17 is configured to be able to reliably contact the pan bottom while moving to the position.

  Here, as shown in FIGS. 1 and 4, the sensor column 18 is fixed in a watertight manner to a column through hole 19 provided in the bottom surface portion 9 a of the secondary air passage 9. Further, the lower end portion of the sensor column 18 is fixed to a sensor fixing bracket 37 (see FIG. 1), and the sensor column 18 and the sensor seal flange 38 are crimped so as to be watertight at the outer periphery of the sensor column 18. Then, by screwing the sensor fixing bracket 37 to the upper mixing tube portion 2b, the sensor seal flange 38 closes the central hole portion of the mixing tube 2 exposed on the top plate 12 with a watertight structure. It is.

  According to the above configuration, the air intake opening 8 formed in a part of the outer peripheral wall 4 a of the burner head body 4 is disposed at a position lower than the flame hole 7 and away from the flame hole 7. As a result, the air flows in the direction of arrow B in FIG. 1 from the outside of the burner to the lower side of the flame hole 7 and from the air intake 8 to the upper side of the flame hole 7 through the secondary air passage 9. The air flow can be divided into the air flow indicated by the arrow A in FIG. 1, whereby the combustion secondary air is sufficiently supplied to the flame hole 7 from both the upper and lower sides.

  In addition, since no flame is formed in the vicinity of the air intake 8 that is separated from the flame hole 7, the air taken into the secondary air passage 9 may be consumed in the vicinity of the air intake 8. In addition, the shortage of air above the arrow A in FIG. 1 is not caused, and the exhaust gas component of the flame is not mixed in the air, so that inconvenience such as defective combustion does not occur. In addition, since it is not necessary to reduce the amount of heating in order to eliminate the shortage of secondary air for combustion, the fire transfer performance between the flame holes 7 can be maintained well.

  Further, in this example, the virtuosity frame portion 15 acts as a partition wall 11 for smoothly separating the flame hole 7 and the air intake port 8, thereby preventing the temperature rise of the air taken into the air intake port 8, Further, it is possible to reliably prevent the air taken into the air intake port 8 from being consumed by the rising air flow generated in the vicinity of the flame hole 7.

  Although it is possible to project the five-virtual frame portion 15 in the horizontal direction without inclining, it is desirable to incline in order to ensure the lower air flow indicated by the arrow B in FIG.

  In this example, by using the five virtue frame portion 15 as the partition wall 11, the partition wall 11 can be configured with a simple structure by reducing the number of parts. Moreover, since the air intake 8 is exposed only by removing the virtues 13, and the concave groove 32 (air intake 8) is exposed only by removing the burner base 5 from the burner head body 4, it can be easily cleaned. become.

  Moreover, in this example, since the air which is not influenced by the heat by the flame of the flame hole 7 flows around the pan bottom sensor 17 provided in the position facing the secondary air passage 9, the pan bottom sensor 17 is connected to the flame hole 7. There is no inconvenience that the temperature detected by the pan bottom sensor 17 becomes inaccurate. In addition, the sensor support 18 and the bottom surface portion 9a of the secondary air passage 9 have a watertight structure, and the burner head body 4 and the top plate 12 have a watertight structure. Even if the broth enters from the gap with the inner peripheral side of the burner cap 6, the broth does not enter the gas cooker casing 21 disposed below the top 12. That is, the broth spilled into the secondary air passage 9 is discharged to the top surface of the top plate 12 from the air intake port 8 through the bottom surface portion 9a of the secondary air passage 9 and can be easily cleaned. It is.

  In the said embodiment, although the height position of the inner peripheral side edge part 15b of the five virtue frame part 15 is comprised so that it may be located in the outer peripheral surface of the burner base 5, the inner peripheral side edge part 15b of the five virtue frame part 15 is comprised. The height position may be lower than the flame hole 7 and higher than the air intake port 8, and is not necessarily limited to the height position of the burner base 5.

  Moreover, although the case where the five virtue frame part 15 was used as the partition 11 was shown, instead of using the five virtue frame part 15 as the partition 11, you may make it provide the member (not shown) which comprises the partition 11 separately.

  The partition wall 11 does not necessarily have to be provided over the entire outer periphery of the burner head body 4, and may be any one that protrudes in a bowl shape from above the air intake ports 8.

  Further, the case where the burner head portion 3 is constituted by the burner head main body 4 and the burner base 5 separable from the burner head portion 3 has been described. However, even if the burner head main body 4 and the burner base 5 are integrated into a hollow annular structure. Good.

DESCRIPTION OF SYMBOLS 1 Gas burner for stove 2 Mixing pipe 3 Burner head part 4 Burner head main body 4a Outer wall 5 Burner base 6 Burner cap 7 Flame hole 8 Air intake 9 Secondary air passage 9a Bottom part 10 Gas passage 11 Bulkhead 12 Top plate 13 Gotoku 14 Gotoku claw part 15 Gotoku frame part 15a Outer peripheral side end 15b Inner peripheral side end 17 Pan bottom sensor 18 Sensor support 19 Support post through hole 20 Gas cooker 21 Gas cooker casing 35 Ventilation gap

Claims (4)

  A mixing pipe to which a premixed gas of fuel gas and primary air for combustion is supplied, a hollow annular burner head portion that is exposed above a top plate that covers the upper surface of the gas cooker casing, and a burner head portion A hollow annular burner cap that is detachably mounted on the upper end surface of the burner cap, and a plurality of flame holes are arranged in the circumferential direction of the burner cap between the outer peripheral portion of the burner cap and the upper end surface of the burner head portion. A gas burner for a stove, wherein the combustion secondary air is taken into a part of the outer peripheral wall of the hollow annular burner head portion at a position below the flame hole and away from the flame hole. An air intake port is formed, and a gas passage for introducing the premixed gas from the mixing pipe to the flame hole is provided on the inner peripheral side of the burner head portion, and the combustion secondary air taken in from the air intake port is Burner caps are separated from the gas passage. Gas burner hob, characterized by comprising providing a secondary air passage for guiding from the inner peripheral side through the upper surface of the burner cap into the upper burner ports of.   2. A stove according to claim 1, wherein a partition wall is provided on the outer peripheral wall side of the burner head portion so as to protrude radially outward of the burner head portion from between the flame hole and the air intake port. Gas burner.   The five virtues are mounted on the top surface of the top plate. The five virtues have a plurality of five virtue claw parts and each of the five virtue claw parts joined together and the inner peripheral side end abuts along the outer peripheral wall of the burner head part. The virtuosity frame portion, and the outer peripheral side end of the virtuosity frame portion is floated from the top surface of the top plate to form a ventilation gap communicating with the air intake port on the lower surface side of the virtuosity frame portion. The gas burner for stove according to claim 2, characterized in that functions as a partition wall. At the position facing the secondary air passage, a pan bottom sensor for measuring the pan bottom temperature and a sensor post for supporting the pan bottom sensor so as to be movable up and down are provided, and the support post is provided on the bottom surface of the secondary air passage. The gas burner for a stove according to claim 3, wherein the gas burner is fixed in a watertight manner with respect to the through hole.

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