JPH041250B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a gas burner for use in a gas stove, and particularly to improving the ease of attaching accessories and the ability to supply secondary air to a pilot flame.

[Conventional technology]

A gas burner conventionally used in a gas stove has an annular head, with an outer burner port provided on the outer periphery and a central burner port provided on the inner periphery. Additionally, gas stoves are usually equipped with accessories such as an ignition device and a safety device.

The ignition source of the ignition device, the sensor of the safety device, etc. need to be placed near the flame opening of the burner, and it is also necessary to prevent boiling liquid from adhering to the burner due to boiling over.

Furthermore, various gas burners for stoves have been proposed which have an ignition chamber separated by a partition wall and provided with an ignition source inside the burner, which serves as a mixing chamber for fuel gas and primary air. (For example, in 1973
(No. 144171, No. 58-148439, No. 59-23576) [Problems to be solved by the invention] However, since the head of the conventional gas burner for stove has a closed annular shape, the ignition source, sensor, etc. It is difficult to secure a place to attach the accessories, making it difficult to assemble,
The drawback was that maintenance was time consuming.

Furthermore, conventional ignition chambers were surrounded by walls on three sides except for the pilot flame outlet, which resulted in the following drawbacks.

(b) The amount of secondary air supplied to the pilot flame becomes insufficient and the airflow becomes turbulent, which limits the amount of firepower and prevents defects in the flame that have occurred at the main vent (outer flame port row). I can't make up for it enough.

(b) Because the flame-extinguishing effect of the walls of the ignition chamber is large,
CO, carbon, etc. are likely to be generated, and ignition failure at the main crater is likely to occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas burner which is excellent in attaching the accessories and can effectively prevent boiling liquid from adhering to the attached accessories.

Another object of the present invention is to provide a gas burner that can sufficiently supply secondary air to the pilot flame, increase the thermal power of the pilot flame sufficiently, and reduce the generation of CO, carbon, and the like.

[Means for solving problems]

In order to achieve the above object, the gas burner of the present invention has the following features:
a hollow burner body having an open ring-shaped head having a discontinuous open ring portion and having an open upper end;
placed on the head of the burner body, covers the upper part of the ring-opening part, closes the upper end opening, forms an outer periphery burner port row on the outer peripheral side joint surface with the burner body, and forms a joint surface of the ring-opening part with the burner body. We adopted a structure consisting of a burner cap that forms a pilot flame port.

[Action and effect of the invention]

(b) Accessory equipment can be attached to this open ring part, making it easy to attach, and since it is attached to the ceiling, it is possible to prevent boiling liquid from adhering to it due to boiling over. Therefore, assembly and maintenance of these instruments can be performed smoothly.

(b) Since the pilot flame communicates with the center of the burner through the ring opening, even if the outer periphery of the burner is covered with a sauce pan and a soup cover, a situation in which the pilot flame lacks secondary air is prevented. . Particularly in this case, since the supply of secondary air to the pilot flame tends to be insufficient, it is effective to supply the secondary air through the ring-opening portion of the present invention.

(c) Since there is sufficient space below and to the sides of the center in the ring-opening section, sufficient secondary air is supplied to the pilot flame from below and from the sides. In addition, this secondary air passage can be formed smoothly and without difficulty.
The secondary air flow is stable and turbulence is less likely to occur. This allows the pilot flame to have a stable and strong firepower, which can fully compensate for the defects in the flame at the main crater. There is also an advantage that the defective portion can be made smaller by setting the ring-opening portion narrower.

(d) Since the space around the pilot flame is wide, the flame-extinguishing effect of the walls can be reduced. This reduces the generation of CO, carbon, etc., and ignites the main crater reliably and quickly.

〔Example〕

Next, the present invention will be explained based on the embodiments shown in the drawings.

The gas stove 100 includes a gas burner 1 of the present invention, 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 gas burner 1 includes a hollow burner body 6 whose head 61 has an open ring shape and a circular ring that is placed on the head 61 and closes an upper end opening 63 of the burner body 6 that includes the open ring part 62. Annular umbrella part 71
and a burner cap 7 having a cylindrical leg part 72 that projects downward from the center of the umbrella part 71 and is fitted into the head part 61, and a mixing pipe 88 is connected to the lower end opening 64 of the burner body. ing.

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 portion 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 both side walls 74, 75 to serve as flame ports for the pilot flame A, and a pair of slits 74 are provided on the outside.
B, 75B is provided as a flame port 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 electric wire 9 having a spark discharge electrode 92 covered with an insulator 91 is installed on the back side, and the opening part 62 of the burner cap is tapered to expand downward. A discharge gap 3A is formed between the protrusion 73A and the protrusion 73A protruding from the lower surface. Further, on the outside of the ring-opening part 62, a thermocouple 10, which is a sensor of a safety device, is arranged in parallel with the ignition electrode 9.
is installed.

In addition, 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 a peripheral flame serving as an annular main crater is provided between it and the outer edge 65 of the upper end opening of the burner body. A mouth row 13 is formed. Further, three pairs of central flame ports 76 are provided on the inner periphery 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.

A soup saucer 51 and a trivet 52 are attached to the top surface of the stove case 5, and a circular soup cover 53 is closed between the soup saucer 51 and the outer periphery of the burner 1 to prevent the soup from falling into the case 5. It is prevented.

The gas supply system 2 includes a gas conduit 21 that is normally connected to a gas pipe 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 during the discharge period 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 this gas stove 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 a spark is generated at 3A during spark discharge. 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 outward from the flame outlet 11 and ignite the air-fuel mixture blown out from the main burner port (outer flame port array) 13 of the burner. 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 peripheral flame 13A 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 degrees, and are stabilized by interference. Further, the inner and outer flame portions 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. The intersecting flames B1 and B2 form an interference flame and extend outward from the burner head. In this case, the flames A1, A2 and the flames B1, B2 are stabilized because sufficient secondary air is smoothly supplied from below and below 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 ignition of the main crater by the pilot flame can be done stably and quickly.

Furthermore, when the outer periphery of the burner 1 is surrounded by the juice cover 53 as in this embodiment, the supply of secondary air from below the outer periphery of the burner 1 is cut off, so that the supply of secondary air to the outer flame is insufficient. In particular, secondary air shortage to the pilot flame A and heating flame B is likely to occur. In this case, the shortage of secondary air can be resolved if there is an open ring part 62 communicating with the center of the burner as in the present invention.

When liquid spills onto the burner 1 due to boiling or boiling over from the food 14 being heated by the burner 1, the ceiling 7 of the burner cap 7
3 is blocked by the ceiling portion 73. 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 that has entered from the outlet is blocked by the thermocouple 10, and the ignition electrode 9 This can be improved by the anti-fouling effect of

It should be noted that the present invention includes the following modifications in addition to the above-mentioned embodiments.

(b) Only the ignition source is placed under the ceiling of the burner cap, and the extinguishing detection sensor may be attached to the outer periphery of the burner or may not be provided.

(b) The ignition source may be a resistor or pilot burner that becomes red hot when energized, and the extinguishing detection sensor may be a thermistor or other device whose electrical resistance value changes with temperature changes.

[Brief explanation of drawings]

Fig. 1 is a sectional view schematically showing a gas stove according to the first embodiment of the present invention, Fig. 2 is a plan view of the burner cap, Fig. 3 is a front view of the gas burner, and Fig. 4 is an assembly diagram of the gas burner. FIG. 5 is a perspective view of the burner cap. In the figure, 100... Gas stove, 1... Gas burner, 2... Gas supply system, 3... Ignition device, 4...
Safety device, 6... Burner body, 7... Burner cap, 9... Ignition electrode, 11... Seed flame outlet, 13... Outer flame port row, 13A... Outer flame, 62... Ring opening portion.

Claims (1)

[Scope of Claims] 1. A hollow burner body including an open annular head having discontinuous ring openings and an open upper end; A gas burner comprising a burner cap that covers the upper part and closes the upper end opening, and forms an outer peripheral burner port row on the outer peripheral side joint surface with the burner body, and a pilot flame port on the open ring joint surface with the burner body. . 2. The gas burner according to claim 1, wherein the ring-opening portion expands downward.