JP4299456B2 - Stove burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a stove burner provided with a heat sensitive element for detecting a flame.
[0002]
[Prior art and problems to be solved by the invention]
Generally, in a burner for a stove used for a gas stove such as a table gas stove or a built-in gas stove, a burner cap is mounted on the burner base, and teeth are circumferentially provided on the lower surface of the outer periphery of the burner cap. In the ridge row arranged in a row, flame holes are arranged in the circumferential direction between the burner cap and the burner base in the circumferential direction, and mixing is provided so as to communicate with the mixing tube between the burner base and the burner cap The chamber and the flame hole are communicated with each other, and a thermocouple as a thermal element is arranged on the outer periphery of the burner base or burner cap to monitor the presence or absence of flame. During cooking, the thermocouple is heated by the flame burning in the flame hole, so that a predetermined output is maintained from the thermocouple, and the valve that opens and closes to supply and stop the gas is kept open. It has become. If the gas does not ignite or the flame disappears carelessly, the thermocouple cannot maintain the output, so the valve is closed to ensure safety.
[0003]
However, in the state of use of the above-described stove burner, the quenching phenomenon occurs in the flame hole of the burner cap during rapid heating power adjustment during cooking, the flame becomes unstable, and the heating of the thermocouple that detects the flame However, there is a proposal for a method of stabilizing the flame by arranging four flame holes for large fires and small fires as in Japanese Patent Publication No. 3-35582. .
[0004]
In Japanese Patent Publication No. 3-35582, as shown in FIG. 11, the outer periphery of the burner cap 1 is provided with a recess 2 that is recessed toward the center, and the thermocouple 3 as a heating element is accommodated in the recess 2. The four detection flame holes 4a1 ', 4a2', 4a3 ', 4a4' are formed in the burner cap 1 at the two concave portions, and the four detection flame holes 4a1 ', 4a2', 4a3 are formed. ′, 4a4 ′, the two detection flame holes 4a2 ′, 4a3 ′ on the center side have a low gas flow rate, and the remaining two detection flame holes 4a1 ′, 4a4 ′ have a high gas flow rate. The flame F1 ′ is formed in the detection flame hole 4a1 ′, the flame F2 ′ is formed in the detection flame hole 4a2 ′, the flame F3 ′ is formed in the detection flame hole 4a3, and the flame F4 ′ is formed in the detection flame hole 4a4 ′. It is like that. When the heating power is large, flames F1 ′, F2 ′, F3 ′, and F4 ′ are formed as shown in FIG. 11A, and the flames F2 ′ and F3 ′ are located in a circumscribed state with respect to the thermocouple 3. When the heating state is maintained and the heating power is small, flames F1 ′, F2 ′, F3 ′, and F4 ′ are formed as shown in FIG. 11B, and the flames F1 ′ and F4 ′ are thermoelectrically generated. It is positioned so as to sandwich the pair 3 and maintains a heating state for the thermocouple 3 by radiant heat from the flames F1 ′ and F4 ′.
[0005]
However, in a gas stove that is built into the system kitchen or the like, even with a stove burner alone, a draft flow D is generated around the burner exhaust gas, and the flame of the stove burner is burned. When the other burner burner, grill and oven are used at the same time, the flow of the draft flow D becomes strong, the flame to the thermocouple 3 is further burned and becomes unstable, and the fire may be extinguished. As disclosed in the above Japanese Patent Publication No. 3-35582, the detection flame holes 4a2 'and 4a3' on the center side for reducing the amount of gas for large fires, and the two detection flames on the outside for increasing the amount of gas for small fires In the structure comprising the holes 4a1 'and 4a4', when the fire power of the small fire is further reduced, the small flame F 'is blown as shown in FIG. However, the thermocouple 3 cannot be properly heated and extinguishes. In order to eliminate this problem, if the gas flow rate of the detection flame holes 4a2 'and 4a3' on the central side is increased in the same manner as the detection flame holes 4a1 'and 4a4' on the outer side, the detection flame holes 4a1 'are generated at the time of ignition. , 4a4 ′ and the flames F2 ′ and F3 ′ formed in the detection flame holes 4a2 ′ and 4a3 ′ also become a large fire as shown in FIG. 13, and the flames F1 ′ and F2 ′. , F3 ′ and F4 ′ are combined together, and the reducing flame of this flame comes into contact with the thermocouple 3 and the thermocouple 3 is not sufficiently heated.
[0006]
The present invention has been made in view of the description, and can detect flames with a thermal element without any problem even in the case of draft flow, and can prevent fires from being inadvertently extinguished. It is another object of the present invention to provide a stove burner that can be further reduced.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the burner for a stove according to the present invention has burner caps 1 mounted on the burner base 5 and burners with six rows of ridges arranged in the circumferential direction on the lower surface side of the outer periphery of the burner cap 1. The flame chamber 4 provided in the circumferential direction on the outer periphery between the cap 1 and the burner base 5 in the circumferential direction and the flame chamber 4 provided so as to communicate with the mixing tube 7 between the burner base 5 and the burner cap 1 and the flame. In the stove burner in which the hole 4 is communicated, a recess 2 is formed in the outer peripheral portion of the burner cap 1 so as to be recessed toward the mixing chamber 8, and a heat sensing element for detecting a flame is accommodated in the recess 2. The four detection flame holes 4a1, 4a2, 4a3, 4a4 are arranged in a line corresponding to 2 and the outer peripheral direction of the protrusion 6 between the four detection flame holes 4a1, 4a2, 4a3, 4a4 in the outer peripheral direction. The width of the recess 2 on the top of the recess 2 The central ridge 6 between the pair of detection flame holes 4a2 and 4a3 located at the center in the width direction of the concave portion 2 is opposed to the thermal element, and the central ridge 6 is disposed in the concave portion 2. It is characterized by extending in the outer circumferential direction from the other protrusion 6.
[0008]
In the case of a large fire, the flames F1 and F2 formed in the detection flame holes 4a1 and 4a2 and the flames F3 and F4 formed in the detection flame holes 4a3 and 4a4 are separated by a ridge 6 protruding out of the center. The flame which is formed in the detection flame holes 4a1, 4a2, 4a3 and 4a4 can be detected reliably when the outer flame, which is an oxidation flame, contacts the heat sensitive element. 2, the flame F is less likely to be blown by the draft flow D, and the flame F can be reliably contacted with the thermal element and the flame F can be detected. Therefore, even if the draft flow D is struck, it is possible to prevent a fire from being inadvertently detected by the heat sensitive element and to prevent the fire from being inadvertently fired, and it is possible to further reduce the heating power when using a small fire.
[0009]
It is also preferable that the four detection flame holes 4a1, 4a2, 4a3, 4a4 have the same flow path area . By making the flames F2 and F3 formed in the detection flame holes 4a2 and 4a3 the same size as the flames F1 and F4 formed in the detection flame holes 4a1 and 4a4, the central flames F2 and F3 can be enlarged. Even if the firepower of the small fire is further reduced, the flame F can be detected, and the usability for stewed dishes can be improved.
[0010]
It is also preferable that the concave portion 2 is formed in the burner cap 1 on the rear side opposite to the front side where the instrument is operated, and the heat sensitive element is disposed in the concave portion 2. When the instrument is used, a draft flow D is generated from the front side to the rear side of the instrument. However, in order to detect the flame of the detection flame holes 4a1, 4a2, 4a3, 4a4 on the rear side of the burner cap 1, the draft flow D is detected. The flame can be reliably detected without being further affected, and the performance with a small fire is further improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 2, the burner body 10 integrally has a mixing tube 7 and is formed of aluminum in this example. When fuel gas is supplied from a nozzle 11 provided at the base end of the mixing pipe 7, primary air is sucked from the base end of the mixing pipe 7 via the air regulator 12, and the fuel gas and primary air are mixed in the mixing pipe 7. It is supposed to be mixed. An annular burner base 5 is provided on the upper surface of the burner body 10, and the burner cap 1 is mounted on the burner base 5.
[0012]
As shown in FIG. 7, a ridge 6 is bored in the circumferential direction on the lower surface side of the burner cap 1, and this ridge 6 row surrounds between the burner cap 1 and the burner base 5. Flame holes 4 are formed in the direction. The flame holes 4 include detection flame holes 4a1, 4a2, 4a3, 4a4, a main flame hole 4b, and an ignition flame hole 4c. A large number of main flame holes 4b are formed in the circumferential direction, and the main flame holes 4b face obliquely upward. A chamfer CH is provided horizontally on the outer periphery of the upper surface of the burner base 5 at a portion corresponding to the lower surface of the outer periphery of the burner cap 1, and the outer periphery between the burner cap 1 and the burner base 5 is substantially entirely provided by this chamfer CH . A flame holding gap 14 is formed around the circumference, and the flame holding gap 14 communicates with the lower part of the main flame hole 4b. Further, a communication concave groove 13 is provided in a substantially entire circumference of the chamfer 11 at a portion where the flame holding gap 14 is formed. A groove portion 15 a is provided on the lower surface side of the burner cap 1 so as to be positioned between the main flame holes 4 b, and a flame holding gas flow path 15 is formed between the burner cap 1 and the burner base 5 in the groove portion 15 a. It is. The groove 15a is open on the lower surface and inner peripheral side of the burner cap 1, but is not open on the outer peripheral side. An annular mixing chamber 8 communicating with the mixing tube 7 is provided between the burner cap 1 and the burner base 5, and the annular mixing chamber 8 communicates with the main flame hole 4 b and the flame holding gap 14. ing.
[0013]
An ignition flame hole 4c is formed at an appropriate position in the circumferential direction of the burner cap 1, and the mixing chamber 8 and the ignition flame hole 4c communicate with each other. A spark plug 18 is mounted on the outer periphery of the burner base 5 at the portion where the ignition flame hole 4c is provided so as to face in the vertical direction, and a plug cover is provided so as to cover the side and upper side of the portion where the spark plug 18 is mounted. The piece 19 is provided integrally, and the plug cover piece 19 is provided with a target electrode corresponding to the discharge electrode 18 a of the spark plug 18.
[0014]
Further, four detection flame holes 4a1, 4a2, 4a3.4a4 are arranged in parallel at appropriate positions in the circumferential direction of the burner cap 1, and the detection flame holes 4a1, 4a2, 4a3, 4a4 and the mixing chamber 8 communicate with each other. is doing. The detection flame holes 4a1, 4a2, 4a3, 4a4 have a flow passage area that allows a gas flow rate comparable to that of the main flame hole 4b, and each of the detection flame holes 4a1, 4a2, 4a3, 4a4 has the same flow rate. It has a road area. In the portion where the four detection flame holes 4a1, 4a2, 4a3 and 4a4 are provided, a recess 2 which is recessed toward the mixing chamber 8 is formed in the outer peripheral portion of the burner cap 1. A flange protruding from the outer peripheral end of the protrusion 6 between the four detection flame holes 4a1, 4a2, 4a3, 4a4 to the outer peripheral side at the upper part of the recess 2 of the four detection flame holes 4a1, 4a2, 4a3, 4a4 9 is provided in the width direction of the recess 2. The outer peripheral end of the central ridge 6 between the pair of detection flame holes 4a2 and 4a3 positioned at the center in the width direction of the recess 2 is protruded outward from the outer periphery of the other ridge 6 positioned in the recess 2. . A small flame hole 4a 'for forming a small fire is formed in the central protrusion 6 as necessary. A thermocouple 3 is arranged in the recess 2 as a heat detecting element for flame detection, and combustion is continued when the thermocouple 3 detects a flame. The thermocouple 3 is attached to the burner base 5 by being inserted into an element attachment hole 20 provided in the burner base 5. When the thermocouple 3 is attached to the burner base 5, it faces the protrusion 6 located between the detection flame holes 4a2 and 4a3.
[0015]
On the upper surface side of the burner cap 1, a saucer 21 that receives the broth is mounted so that a gap is formed between the burner cap 1 and the saucer 21. Further, a large number of concave grooves 22 are formed on the upper surface of the burner cap 1 in order to promote air flow between the upper surface of the burner cap 1 and the lower surface of the tray 21.
[0016]
When the premixed fuel gas mixed with the primary air is supplied from the mixing tube 5 to the annular mixing chamber 8 between the burner cap 1 and the burner base 5, the main flame hole 4b and the detection flame hole 4a1 are supplied. , 4a2, 4a3, 4a4 and the ignition flame hole 4c, and the decompressed fuel gas is ejected from the flame holding gap 14 through the flame holding gas flow path 15. At this time, a spark is generated between the discharge electrode 18a of the spark plug 18 and the target electrode, and the fuel gas ejected from the ignition flame hole 4c is ignited to form an ignition flame. The main flame hole 4b, The fuel gas ejected from the detection flame holes 4a1, 4a2, 4a3, 4a4 and the flame holding gap 14 is ignited, and the main flame Fa is held in the main flame hole 4b and the flame holding gap 14 is held as shown in FIG. Fb is formed, and flames F1, F2, F3, and F4 are formed in the detection flame holes 4a1, 4a2, 4a3, and 4a4 as shown in FIG.
[0017]
The flames F1, F2, F3, and F4 are formed in the detection flame holes 4a1, 4a2, 4a3, and 4a4, whereby the thermocouple 3 is heated and combustion is continued. When the flames F1, F2, F3, F4 formed in the detection flame holes 4a1, 4a2, 4a3, 4a4 are large fires, the flame F1 formed in the detection flame holes 4a1, 4a2 as shown in FIG. , F2 and the flames F3, F4 formed in the detection flame holes 4a3, 4a4 are separated by a protrusion 6 projecting out of the center, and the outer flame, which is an oxidation flame, comes into contact with the thermocouple 3 to cause a flame. In the case of a small fire, as shown in FIG. 1B, the flame F formed in the detection flame holes 4a1, 4a2, 4a3, 4a4 is connected in the recess 2 with the flange 9 at the top. This makes it difficult for the flame F to be blown by the draft flow D, so that the flame F can reliably contact the thermocouple 3 and sense the flame F. Therefore, the flame F can be detected without any problem even if the draft flow D is swung, and the fire F can be prevented from being inadvertently extinguished, and the thermal power when using a small fire can be further reduced.
[0018]
Further, the gas stove B incorporating the stove burner A configured as described above is used by being installed in the kitchen unit C of the kitchen as shown in FIG. 8, but when the gas stove B is used, FIG. A draft flow D such as In FIG. 8, E is the rear wall, G is the side wall, and H is the front of the gas stove. 8A shows the case where the side wall G is on the right side, and FIG. 8B shows the case where the side wall G is on the left side. FIG. 9 is an enlarged view of the portion of the stove burner A in the state of FIG. 8, and shows a state in which the flame F formed on the outer periphery of the burner cap 1 is blown by the draft flow D. In FIG. 9, J1 is the position of the ignition part having the ignition hole 4c, the spark plug 18, etc., and J2 is the position of the flame detection part having the detection flame holes 4a1, 4a2, 4a3, 4a4, the recess 2, the thermocouple 3, etc. is there. FIG. 9A shows a case where the side wall G is on the right side, and FIG. 9B shows a case where the side wall G is on the left side. In the present invention, the flame detection part J2 is arranged behind the burner cap 1 (on the side opposite to the front surface of the gas stove) so as not to be affected by the draft flow D. That is, it is arranged behind the center line K parallel to the front surface of the gas stove so as not to be affected by the draft flow D.
[0019]
In order not to be affected by the draft flow D, it is desirable to dispose the flame detector J2 directly behind, but in reality, it is not possible to dispose the flame detector J2 directly behind for the following reason. When the gas stove B is the built-in stove B1, the stove burner A is arranged so that the mixing tube 7 faces rightward as shown in FIG. 10A. In this case, the element provided on the burner base 5 When the mounting hole 20 is to be provided immediately behind, the mixing tube 7 must be shifted to a predetermined angle side because of the mixing tube 7. When the gas stove B is the table stove B2, the stove burner A is arranged so that the mixing tube 7 faces directly forward as shown in FIG. 10B. In this case, the burner base 5 is provided. When the element mounting hole 20 is to be provided immediately behind, the ignition part J1 is present, and therefore, the element mounting hole 20 must be shifted to a predetermined angle side.
[0020]
When the flame detector J2 is to be provided on the rear side, a separate stove burner A must be prepared for the built-in stove B1 and the table stove B2, but as shown in FIG. If the element insertion holes 20 are provided at two positions on the outer periphery of the burner base 5 of the burner main body 10 at two positions, the common burner main body 10 can be changed only by changing the element insertion holes 20 for mounting the thermocouple 3. The burner cap 1 can be used in combination (the burner cap 1 must be prepared in consideration of the user's mistaken setting). In addition, when the element insertion holes 20 are provided at a plurality of three or more places at substantially equal intervals in the circumferential direction, the position where the flame detection part J2 is further provided can be further freely selected.
[0021]
【The invention's effect】
According to the first aspect of the present invention, a concave portion is formed in the outer peripheral portion of the burner cap so as to be recessed toward the mixing chamber, and a thermal detection element for detecting a flame is accommodated in the concave portion, and four in the portion corresponding to the concave portion. The detection flame holes are arranged in a row, and a flange protruding in the outer peripheral direction from the outer peripheral end of the protrusion between the four detection flame holes is provided on the upper portion of the recess in the width direction of the recess. The center ridge between the pair of detection flame holes located at the center of the center and the thermal element are opposed to each other, and the center ridge is extended in the outer peripheral direction from the other ridges of the recess. The flames formed on both sides of the ridge are divided by the central ridge, and the outer flame, which is an oxidative flame, comes into contact with the thermal element to reliably detect the flame. The flame formed in the flame hole is located in a recess with a crease on the top, and the flame is drafted The flame is surely in contact with the thermal element, and the flame can be detected, and even with a draft flow, the thermal element can detect the flame without any problem and prevent it from being inadvertently extinguished. It is possible to further reduce the thermal power when in use.
[0022]
The invention according to claim 2 of the present invention is that, in claim 1, since the four detection flame holes have the same flow path area, the flame formed in the detection flame hole on the center side can be made small and small. Even if the fire power is further reduced, it is possible to detect flames and improve usability for stewed dishes.
[0023]
According to a third aspect of the present invention, the concave portion is formed in the burner cap at the rear side opposite to the front side where the instrument is operated in the first or second aspect, and the thermal element is provided in the concave portion. Because it is arranged, the flame can be detected reliably without further influence of the draft flow to detect the flame of the detection hole behind the burner cap, and the performance with small fire is further improved. .
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram for explaining the operation of the main part of the present invention, in which (a) is a state at the time of a large fire and (b) is a state at the time of a small fire.
FIG. 2 is an exploded perspective view of the above-described stove burner, and (a) and (b) are perspective views as seen from different directions.
FIG. 3 is an enlarged exploded perspective view of the burner cap and the burner base part.
FIG. 4 is an enlarged perspective view of the main flame hole and the flame holding gap.
5A and 5B show a state of main flame and flame holding, in which FIG. 5A is a perspective view, FIG. 5B is a plan view, and FIG. 5C is a cross-sectional view.
FIG. 6 is a perspective view enlarging a part of a flame detection unit having a detection flame hole and a thermocouple.
FIG. 7 is a bottom view showing the burner cap.
FIG. 8 is an explanatory diagram for explaining a draft flow generated on a gas stove.
FIG. 9 is an explanatory diagram for enlarging the main part of FIG. 8;
FIG. 10 is an explanatory diagram for explaining the arrangement of a stove burner on a gas stove, wherein (a) shows a case where the gas stove is a built-in stove, and (b) shows a case where the gas stove is a table stove. Is the case.
11A and 11B are explanatory diagrams for explaining a conventional example. FIG. 11A shows a case of a large fire, and FIG. 11B shows a case of a small fire.
FIG. 12 is an explanatory diagram for explaining a problem of a conventional example.
FIG. 13 is an explanatory diagram for explaining another problem of the conventional example.
[Explanation of symbols]
1 Burner Cap 2 Recess 3 Thermocouple 4a1 Detection Flame Hole 4a2 Detection Flame Hole 4a3 Detection Flame Hole 4a4 Detection Flame Hole 5 Burner Base 6 Projection 7 Mixing Tube 8 Mixing Chamber 9 庇

Claims (3)

A burner cap is placed on the burner base, and flame holes are arranged in the circumferential direction on the outer circumference between the burner cap and the burner base in a row of ridges arranged circumferentially on the lower surface of the outer circumference of the burner cap. In the stove burner in which the mixing chamber provided to communicate with the mixing tube between the burner base and the burner cap and the flame hole are communicated, a recess is formed in the outer periphery of the burner cap so as to be recessed toward the mixing chamber. And a flame detection thermal element is accommodated in the recess, and four detection flame holes are arranged in a line corresponding to the recess, and the outer peripheral ends of the protrusions between the four detection flame holes A flange projecting in the outer peripheral direction is provided at the upper part of the recess in the width direction of the recess, and the center protrusion between the pair of detection flame holes located in the center of the recess in the width direction is opposed to the thermal element. And let this central ridge be in the outer circumferential direction from the other ridges of the recess. Stove burner, characterized by comprising stretched. The stove burner according to claim 1, wherein each of the four detection flame holes has the same flow path area . 3. The stove according to claim 1, wherein the recess is formed in the burner cap on the rear side opposite to the front side where the instrument is operated, and a heat sensitive element is arranged in the recess. Burner.

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