JPH0629657B2 - Gas burner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to a gas burner for use in a gas stove, and particularly to improving the durability of the gas burner.

[0002]

2. Description of the Related Art A conventional gas burner used for a gas stove includes a burner body having an open upper end and a continuous closed annular head, and a burner cap mounted on the head of the burner body to close the upper end opening. The outer peripheral flame outlet is provided on the outer periphery, and the central flame outlet is provided on the inner periphery.

[0003]

The gas burner for the stove is manufactured mainly by casting and then machining it from the viewpoint of manufacturing cost. However, the gas burner becomes brittle over time, and it is continuously used for about 5 years at most. Was only possible. The present inventor has pointed out that the main cause of the deterioration of strength over time is that the head has a closed ring shape, and therefore the thermal stress is repeatedly applied to the ring section due to a temperature difference between when it is used and when it is not used. It has been found that the structure itself is a cast iron burner head having an annular head. The present invention has been made based on the above findings, and an object thereof is to provide a gas burner for a stove that can endure redundant long-term use and does not require replacement.

[0004]

A gas burner of the present invention has a discontinuous ring-opening portion and an upper end.
An open annular head that is open, and the opening of the open annular head
A trunk portion extending downward from a position opposite to the ring portion, and
While the width of the ring-opening portion expands downward,
A hollow bar in which the open annular head is formed symmetrically with respect to the body
The body and the head of the burner body.
Covering the upper part of the ring opening portion and closing the upper end opening, and
A peripheral flame row is formed on the outer peripheral joint surface with the burner body.
And the pilot flame on the joint surface of the open ring with the burner body.
It consists of a burner cap that forms a flame mouth .

[0005]

According to the gas burner of the present invention, since the head portion of the burner body is in an open ring shape, the thermal stress generated in the head portion of the burner body due to the temperature difference between the time of use and the time of non-use can be reduced. In particular, by providing the ring-opening portion at a position facing the body portion and having a structure in which the width is expanded downward, the following effects are obtained. B) Since the burner body is symmetrical to the left and right, uneven thermal expansion is unlikely to occur. B) Since the width of the ring opening at the top of the burner body head, which is high temperature and has large thermal expansion, is large, the width of the ring opening at the bottom of the burner head, which is relatively low and has small thermal expansion, is large. In comparison with the case where the width of the burner is uniform in the vertical direction, thermal deformation is easier when the burner is used, and the thermal stress generated inside is reduced accordingly. As a result, the deterioration of strength of the cast iron burner body is reduced and the durability can be improved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on the embodiments shown in the drawings. A gas stove 100 includes a gas burner 1 of the present invention, a gas supply system 2 for the gas burner 1, an ignition device 3, a safety device 4, and a stove case 5. The gas burner 1 has a body portion 60 and an open ring portion 62 that is continuous with the upper end of the body portion and that widens downward at a position facing the body portion, and has an open circular annular head with an open upper end. A hollow cast iron burner body 6 having a portion 61, an annular umbrella portion 71 placed on the head portion 61 of the burner body and closing the upper end opening 63, and downward from the center of the umbrella portion 71. The burner cap 7 is provided with a cylindrical leg portion 72 that is protruded into and fitted into the head portion 61. The mixing pipe 8 is connected to the lower end opening 64 of the body portion 60 of the burner body 6.

The umbrella portion 71 of the burner cap that closes above the open ring portion 62 of the burner body is the ceiling 73 of the open ring portion 62, and the lower surface of the burner cap of the ceiling 73 has both side walls. 74 and 75 are provided so as to project from the upper end opening 63 of the burner body. These side walls 74, 7
5, a pair of slits 74A and 75A are provided on the back side to serve as a flame opening for the seed flame A, and a pair of slits 74B and 75B are provided on the outside to form a flame opening for the fire detection flame B. Has been done. Each of these slits is provided obliquely outward at a predetermined angle.

The ring-opening portion 62 of the burner body is tapered downwardly, and the ignition electrode 9 having a spark discharge electrode 92 wrapped with an insulator 91 is erected on the back side.
A discharge gap 3A is formed between the burner cap and the projection 73A provided on the lower surface of the ceiling 73 of the burner cap. A thermocouple 10, which is a sensor of a safety device, is attached to the ignition electrode 9 on the outer side of the ring opening 62. In addition, the umbrella section 71
Comb-shaped protrusions 7 are formed on the outer edge of the lower surface except the ceiling 73.
A is provided around the outer edge 6 of the upper end opening of the burner body.
An outer peripheral flame nozzle array 13 which is an annular main crater is formed between the outer peripheral flame nozzle array 5 and the outer peripheral nozzle hole 5. Furthermore, three pairs of central flame outlets 7 are provided on the inner circumference of the umbrella portion 71.
6 is provided.

The upstream end 81 of the mixing tube 8 serves as an inlet for the fuel gas and the primary air, and an inlet 82 for the primary air is provided on the end face. The upper surface of the stove case 5 is closed by an annular juice cover 53 between the broth pan 51 and the outer periphery of the burner 1 to prevent the broth from falling into the case 5. The gas supply system 2 includes a gas conduit 21 and a valve 2 which are connected to a normal gas pipe via a rubber hose.
2. The nozzle 23 has a nozzle 23 whose tip is inserted into the mixing pipe 8, and the valve 22 is opened and closed by operating the knob 24 and can be maintained by the output of the thermocouple.

The ignition device 3 comprises a high voltage generating means 32 comprising a combination of the ignition electrode 9, a piezoelectric element and a striking mechanism for impacting the piezoelectric element, or a combination of a dry battery and a high voltage pulse generating circuit. And a lead wire 33 connecting them. This high voltage generating means 32
Is normally operated by the knob 24, and a spark is generated in the discharge gap 3A in conjunction with the operation of opening the valve 22.

The safety device 4 comprises the thermocouple 10 and an electromagnet (not shown) provided in the valve 22 so as to keep the valve body of the valve 22 open by its output, and a burner. When the thermocouple 10 is heated by the flame B and the temperature of the thermocouple 10 is equal to or higher than the set temperature, the valve 22 is kept open, and the temperature of the thermocouple 10 is lower than the set value due to fire extinguishing. When lowered, the valve element operates in the valve closing direction due to the action of a spring (not shown) provided on the back.

Next, the operation of the gas stove 100 will be described. When the knob 24 is pushed, the valve 22 is opened and jetted from the nozzle 23 connected downstream of the valve 22. Air is sucked from the primary air intake port 82 by the action of the ejector by this jet flow of gas, mixed in the mixing pipe 8 and supplied into 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 blown out from the slits 74A and 75A, which are the air-fuel mixture supply paths, is ignited to generate seed flames A ₁ and A ₂ . The slits 74 are formed by the seed flames A ₁ and A _2.
B and 75B are ignited in the air-fuel mixture and thermocouple 1
Zero heating flames B ₁ and B ₂ are produced. The heating flames B ₁ and B ₂ are blown out from the flame outlet 11
Ignition of the air-fuel mixture blown from the main crater (peripheral flame row) 13 of the burner.

That is, in this embodiment, a flame relay is used.
Heating flame B ignited by the main crater 13 ₁And B₂Is the main fire
Produced as a flame that supplements the defective portion of the peripheral flame 13A generated at the mouth 13.
I am using. At this time, seed flame A₁And A₂Is almost 90
It is set to intersect at an angle of °, and it is safe due to interference.
Is standardized. Also flame B₁And B₂Is the external flame part inside
Contacts the both sides of the thermosensitive part of the thermocouple 10, and the outside of the thermocouple 10
And intersect at an angle of about 60 °. This crossed flame B₁Oh
And B₂Becomes an interference flame and extends outside the burner head
It Flame A in this case₁, A₂And flame B₁, B₂
Is sufficient secondary air is disturbed from below and below
These flames are stabilized because they are supplied smoothly without any heat. Disappear again
Flame due to extinguishing because there are few cold solid walls that cause flame action
Is less likely to become inferior. By these, seed fire by seed flame
Ignition in the mouth is stable and quick.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a gas stove using a gas burner of the present invention.

FIG. 2 is a plan view of a burner cap.

FIG. 3 is a front view of a gas burner.

FIG. 4 is an assembly diagram of a gas burner.

FIG. 5 is a perspective view of a burner cap.

[Explanation of symbols]

 1 Gas Burner 2 Gas Supply System 3 Ignition Device 6 Burner Body 7 Burner Cap 62 Ring Opening Part

Claims (1)

[Claims] 1. When a ring-opening portion is discontinuous
An open annular head whose upper end is open, and the open annular head
Of the body extending downward from the position opposite to the ring opening
And when the width of the ring-opening portion expands downward
Mainly, the open annular head is formed symmetrically with respect to the body
Placed on the hollow burner body and the head of the burner body
And cover the upper part of the ring opening and the upper end opening.
And the outer peripheral flame on the outer peripheral side joint surface with the burner body.
The mouth row is formed, and the ring opening is connected to the burner body.
A gas burner consisting of a burner cap that forms a seed flame port on the mating surface .