JPH0440604B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cooking stove burner with measures against boiling over.

[Prior technology] A fire extinguishing sensor, which is a safety device that automatically closes a valve installed in the gas supply path when the flame goes out due to blowing out, boiling over, ignition error, gas interruption, etc., has conventionally been installed on the side of the burner. It was placed on the side. Furthermore, various stove burners have been proposed which have an ignition chamber separated by a partition wall and in which a small burner is arranged inside the burner, which serves as a mixing chamber for fuel gas and primary air. (For example, Utility Model No. 52-144171,
(No. 58-148439, No. 59-23576) [Problems to be solved by the invention] For this reason, the fire extinguishing sensor of the safety device has the disadvantage that it is easily contaminated by boiling over, and its durability is impaired due to corrosion due to acid. Ta.

An object of the present invention is to prevent liquid caused by boiling over from adhering to a fire extinguishing sensor, and to
The purpose of the present invention is to provide a stove burner that is easy to attach to a fire extinguishing sensor and an ignition source.

[Means for Solving the Problems] In order to achieve the above object, the cooking stove burner of the present invention has an open ring shape with a wide lower part and a narrow upper part, and a hollow head having an open upper end. a burner body, and is placed on the head, covers the upper part of the open ring part, closes the upper end opening of the burner body, and forms a main crater row on the outer periphery of the joint part,
The interior includes a burner with a mixing chamber for fuel gas and primary air, a fire extinguishing sensor disposed on the outside of the ring opening, and an ignition source disposed on the inside of the ring opening. Adopted.

[Operations and Effects of the Invention] The stove burner of the present invention has the following functions and effects because the fire extinguishing sensor and the ignition source are disposed in the open ring part of the burner head.

(a) Since both the extinguishing sensor and the ignition source are covered by the top surface of the burner, liquids such as boiled over water are less likely to adhere to them. Therefore, the durability of the fire extinguishing sensor is high, and ignition failure is less likely to occur.

(b) Since there is sufficient space below and to the sides of the center side of the ring opening, sufficient secondary air is supplied to the ignition flame from below and from the sides. In addition, because this secondary air flow can be formed smoothly and effortlessly,
The secondary air flow is stable and turbulence is less likely to occur. This allows the ignition flame to have a stable and strong firepower, which can sufficiently compensate for the defects in the flame at the main crater.

(c) Since the ring opening has sufficient space below and on the sides of the center, it is easy to install the fire extinguishing sensor and the ignition source, making it easy to assemble and replace them.

(d) Since the space around the pilot flame is wide, the flame-extinguishing effect of the wall surface can be reduced. This not only reduces CO emissions, but also ignites the main crater reliably and quickly.

(E) Even when a large amount of liquid such as boiling liquid hits the burner due to boiling over or boiling over, the liquid is intercepted by the fire extinguishing sensor and is prevented from adhering to the ignition source. Therefore, ignition failure is less likely to occur.

(F) When a large amount of liquid such as boiling soup comes into contact with the burner, the burner often digests it. At this time, since the extinguishing sensor is located near the outlet, the liquid adheres to the extinguishing sensor and cools the extinguishing sensor, so that the temperature of the extinguishing sensor quickly decreases and the safety device is activated quickly.

[Effects of the Embodiment] By arranging the fire extinguishing sensor on the outer side of the ring-opening part and the ignition source on the inner side, the following actions and effects are produced.

(a) Even when a large amount of liquid gets on the burner due to boiling over, boiling over, etc., the liquid such as boiling liquid is intercepted by the fire extinguishing sensor and is prevented from adhering to the ignition source. Therefore, ignition failure is less likely to occur.

(b) Burners often go out when a large amount of liquid comes into contact with them. At this time, since the fire extinguishing sensor is located near the outlet, liquid such as boiling water adheres to the fire extinguishing sensor and cools the fire extinguishing sensor, so that the temperature of the flame extinguishing sensor decreases quickly and the safety device is activated quickly.

[Example] Next, the present invention will be explained based on an example shown in the drawings.

The stove burner 100 of the present invention includes a burner 1, a gas supply system 2 to the burner 1, an ignition device 3 for the burner 1, a safety device 4, and a stove case 5 in which these are housed.

The burner 1 includes a hollow burner body 6 whose head part 61 has an open ring shape, and the head part 6
A closed annular umbrella portion 7 that is placed on the burner body 6 and closes the upper end opening 63 of the burner body 6 including the ring opening portion 62.
1, a burner cap 7 having a cylindrical leg part 72 projecting downward from the center of the umbrella part 71 and fitted into the head part 61, and a mixing pipe 8 connected to a lower end opening 64 of the burner body.

The umbrella part 71 of the burner cap that closes the upper part of the ring opening part 62 of the burner body is connected to the ring opening part 62 of the burner body.
The lower surface of the burner cap of the ceiling 73 has side walls 74 and 75 projecting from it to close the space between it and the upper end opening 63 of the burner body. A pair of slits 74A, 75A are provided on the back side of the side walls 74, 75 to serve as flame holes for the pilot flame A, and a pair of slits 74 are provided on the outside.
B, 75B are provided as flame holes for extinguishing detection flame B. Each of these slits is provided diagonally outward at a predetermined angle. The open ring part 62 of the burner body is tapered to expand downward, and the ignition electrode 9 having a spark electrode 92 covered with an insulator 91 is provided on the back side, and the opening part 62 of the burner body is tapered to expand downward. A discharge gap 3A is formed between the protrusion 73A and the protrusion 73A protruding from the lower surface.
Furthermore, a thermocouple 10 serving as a safety device sensor is attached to the outer side of the ring-opening portion 62 in parallel to the ignition electrode 9.

Also, a comb-like protrusion 7A is provided around the outer edge of the lower surface of the umbrella portion 71 excluding the ceiling portion 73, and forms an annular main crater 13 between it and the outer edge 65 of the upper end opening of the burner body. are doing. Further, a central flame hole 14 is provided in the center of the umbrella portion 71.

The mixing tube 8 has an upstream end 81 serving as an inlet for the fuel gas and primary air, and an intake port 82 for the primary air is provided at the end surface.

The gas supply system 2 includes a gas conduit 21 that is normally connected to gas piping via a rubber hose, a valve 22, and a nozzle 23 whose tip is inserted into the mixing pipe 8. The valve 22 is operated by a knob 24. The thermocouple is opened and closed, and the open state can be maintained by the output of the thermocouple.

The ignition device 3 includes the ignition electrode 9 and a high voltage generating means 32 consisting of a combination of a piezoelectric element and a striking mechanism for applying an impact to the piezoelectric element, or a combination of a dry battery and a high voltage pulse generating circuit;
It consists of a lead wire 33 that connects these. This high voltage generating means 32 is normally operated by the knob 24, and is designed to generate sparks in the discharge gap 3A in conjunction with the opening of the valve 22.

The safety device 4 includes the thermocouple 10 and an electromagnet (not shown) provided in the valve 22 so as to maintain the valve body of the valve 22 in an open state using the thermocouple 10.
When normal combustion occurs in the burner and the thermocouple 10 is heated by the flame B and the temperature of the thermocouple 10 is higher than the set temperature, the valve 22 is kept open and the temperature of the thermocouple 10 is lowered by extinguishing the fire or the like. A spring (not shown) is released when the
The valve body operates in the valve closing direction due to the action of the valve body.

Next, the operation of the stove burner 100 will be explained.

When the knob 24 is pressed, the valve 22 opens, and gas is ejected from a nozzle 23 connected downstream of the valve 22. Air is sucked in by the ejector from the primary air intake port 82 by the ejected flow of the gas, mixed in the mixing pipe 8, and supplied to the burner body 6A. When the knob 24 is rotated in conjunction with the pushing operation of the knob, the ignition device 3 is activated and sparks are generated in the spark discharge gap 3A. The air-fuel mixture ejected from the slits 74A and 75A, which are the air-fuel mixture supply paths, is ignited to generate pilot flames A1 and A2. The seed flames A1 and A2 ignite the air-fuel mixture spouted from the slits 74B and 75B, and heating flames B1 and B2 of the thermocouple 10 are generated. The heating flames B1 and B2 are blown out from the flame outlet 11 and ignite the air-fuel mixture blown out from the main burner port 13.
That is, in this embodiment, the heating flames B1 and B2 ignited at the main nozzle 13 by the flame relay act as flames that compensate for the defective portion of the flame generated at the main nozzle 13.

At this time, the seed flames A1 and A2 are set to intersect at an angle of approximately 90°, and are stabilized by interference. Further, the inner and outer flames of the flames B1 and B2 contact both sides of the heat-sensitive portion of the thermocouple 10, and intersect at an angle of approximately 60° on the outside of the thermocouple 10. This crossed flame B
1, B2 becomes an interference flame and extends outward from the burner head. In this case, the flames A1, A2 and B1, B2 are stabilized because sufficient secondary air is smoothly supplied from below and from the lower side without being disturbed. In addition, since there are few low-temperature solid walls that produce an extinguishing effect, flame deterioration due to extinguishing is less likely to occur. As a result, the pilot flame ignites the pilot crater stably and quickly. In order to supply this secondary air even more smoothly, a notch 77 corresponding to the ring-opening part 62 may be provided in the leg part 72 of the burner cap, as shown by the dashed line in FIG.

When liquid spills onto the burner due to boiling over, boiling over, etc. from the food 12 being heated by the burner, it is blocked by the ceiling 73 of the burner cap 7. This prevents spilled liquid from adhering to the ignition electrode 9.
In this case, since the thermocouple 10 is arranged near the outlet 11 and the spark discharge electrode 92 is arranged deep therein, the liquid entering from the outlet is blocked by the thermocouple 10 and the ignition electrode 9
This can be improved by the anti-fouling effect of

FIG. 6 shows a second embodiment of the invention. The first reference numeral in FIG. 1 indicates the same thing. In this embodiment, the ignition source is located below the head 61 of the burner.
6 is a small burner 15 attached to the open ring part 62 so as to be inclined in a direction from the inner side of the lower end to the outer side of the upper end.
and the ignition electrode 9, which is arranged on the side of the small burner 15 and forms a spark discharge gap 3A between it and the tip of the small burner 15.

This ignition source is activated while the knob 24 is pressed.
The mixed gas is supplied to the small burner 15, and the thermocouple 10 is heated by the flame C of the small burner 15 at the time of ignition. Therefore, the electromotive force of the thermocouple 10 rises quickly, and the ignition operation is performed smoothly.

The ignition source of the present invention may be a heater that becomes red hot when energized, and the extinguishment detection sensor may be a thermistor or other device whose electrical resistance value changes with temperature changes.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention,
Figure 1 is a schematic diagram of the gas stove, Figure 2 is a plan view of the burner cap, Figure 3 is a front view of the burner cap head, Figure 4 is an assembly diagram of the burner head, and Figure 5 is a diagram of the burner head assembly.
The figure is a perspective view of the burner cap. FIG. 6 is a schematic sectional view of a gas stove showing a second embodiment of the present invention. In the figure, 100... Stove burner, 1... Gas burner, 2... Gas supply system, 3... Ignition device, 4...
... safety device, 6 ... burner body, 7 ... burner cap, 9 ... ignition electrode, 11 ... pilot flame outlet, 15 ... small burner, 62 ... ring opening part.

Claims (1)

[Claims] 1. A hollow burner body that has an open ring shape with an open ring part that is wide at the bottom and narrow at the top, and has a head that is open at the upper end, and is placed on the head and covers the upper part of the open ring part, and a burner that closes the upper end opening and forms a main nozzle row on the outer periphery of the joint, the interior of which is a mixing chamber for fuel gas and primary air; a fire extinguishing sensor disposed outside the ring opening; A stove burner equipped with an ignition source located inside the opening part.