JPH08189617A - Stove burner - Google Patents

Abstract

PURPOSE: To provide a stove burner which enables the blocking of a flame from blowing under a burner at a communication port of a sub combustion chamber and the presenting of leads or the like of an ignition plug and a fire sensor from being burnt even when the setting position of a burner cap is deviated from the normal position. CONSTITUTION: A burner cap 3 is placed detachably on a circular head part 21 of a burner body 2 having the circular head part 21 to form a ring-shaped train 11 of flame ports while a sub combustion chamber 12 is provided having a communication port 20 communicating below the burner body 2 while an igniter or a fire sensor is mounted at the communication port 20. In a stove burner 1 thus arranged, a flame preventing plate 5 is mounted below the communication port 20 to block a flame infiltrating through the communication port 20.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to improving the safety of a stove burner.

[0002]

2. Description of the Related Art A stove burner has a structure in which a substantially umbrella-shaped burner cap is detachably mounted on a burner body having an annular head, and an annular flame row is formed on the outer circumference. A sub-combustion chamber opened to the outside is provided in the middle of the annular flame port array in order to dispose a spark plug of an ignition device, a thermocouple as a misfire sensor, and the like. On the outer peripheral portion of the lower surface of the burner cap, an annular ridge having slits formed in a comb shape is provided, and a portion of the annular ridge corresponding to the auxiliary combustion chamber is a recess. Form the upper space of the auxiliary combustion chamber. The burner body has an annular installation surface with which the lower end surface of the annular projection abuts, and by mounting the burner cap on the burner body, a small number of sub-units facing the annular flame port array and the auxiliary combustion chambers. It forms a flame mouth.

The annular head portion of the burner body is provided with a recess for forming a lower space of the auxiliary combustion chamber. The bottom of the recess is formed with a communication port for forming the ignition part of the spark plug in the auxiliary combustion chamber and for inserting and mounting the temperature sensing part of the thermocouple from below. In this stove burner, the burner cap may be removed for the purpose of cleaning or the like. When the once removed burner cap is installed on the burner body, the user may mistakenly install the burner cap at a position deviated from the normal position in the rotational direction, and the ignition operation may be performed without noticing it.

[0004]

When the ignition operation is performed with the burner cap installed erroneously, the fuel gas blown up from the burner body toward the burner cap and the primary air are mixed in the auxiliary combustion chamber. Air is deflected downward by the lower surface of the burner head and the annular ridges to form a downward flame. This blow-down flame may be blown below the burner body from the communication port of the auxiliary combustion chamber, and if it is delayed for the user to notice abnormal combustion, there is a risk of burning the spark plug or the lead wire of the thermocouple. .

An object of the present invention is to provide a burner cap which is installed on the burner body even if the installation position deviates from the proper position.
The flame blows from the communication port of the auxiliary combustion chamber to the lower side of the burner,
It is intended to provide a stove burner capable of preventing a spark plug and a lead wire of a misfire sensor from being burnt out. An object of the invention according to claim 2 is to provide a stove burner capable of preventing the broth that has entered from the communication port from staying in the flame prevention plate when the object to be heated overflows. An object of the invention described in claim 3 is to provide a stove burner that can effectively prevent both discharge of broth below the burner and entry of flame below the burner.

[0006]

A stove burner according to the present invention has a burner body having an annular head, and a burner cap is detachably mounted on the annular head to form an annular flame port array.
A stove burner having a communication port communicating with the lower part of the annular head portion in a part of the annular flame port array, and a sub combustion chamber having an ignition device or a misfire sensor mounted facing the communication port. A flame prevention plate for preventing a flame that entered through the communication port was attached below the communication port.

In the stove burner according to the second aspect, the flame prevention plate forms a flameproof section communicating with the communication port inside the annular head by the flame prevention plate, and a soup outlet is provided in the flameproof section. It was The stove burner according to a third aspect is a gap in which the boil-out port is provided between the flame prevention plate and the inner peripheral wall of the annular head.

[0008]

The operation and effect of the present invention, the stove burner of the present invention,
Since the flame prevention plate is provided, it is possible to effectively prevent the flame from blowing below the burner in the auxiliary combustion chamber even when the user mistakes the installation angle of the burner cap and performs an ignition operation without noticing this. Therefore, it is possible to prevent a trouble that the electric device such as the lead wire of the ignition device or the misfire sensor is deteriorated by the flame.

In the structure according to the second aspect, there is a problem that the broth accumulated in the flame prevention plate when the broth overflowing from the pan of the object to be heated enters the auxiliary combustion chamber and flows downward from the communication port. It can be prevented. With the configuration according to the third aspect, it is possible to easily form the broth discharge port, which has a large extinguishing effect and a large broth discharging effect when the flame that has entered the flameproof compartment from the auxiliary combustion chamber is blown downward.

[0010]

1 shows a stove burner according to an embodiment of the present invention. The stove burner 1 is provided with a burner body 2 made of sheet metal and having an annular head portion 21 and a burner cap 3 which is forged and has an umbrella shape and which is detachably mounted on the annular head portion 21. An annular flame port array 11 is formed on the outer periphery of the joint surface between the burner body 2 and the burner cap 3, and a sub-combustion chamber 12 is provided in a part of the annular flame port array 11. A thermocouple 13 (see FIG. 3) as a misfire detection sensor and a spark plug 14 of an ignition device are vertically attached to the auxiliary combustion chamber 12.

As shown in FIG. 3, the burner body 2 is formed by stacking an upper plate and a lower plate, which are formed by press-molding a metal plate punched into a predetermined shape, and caulking or spot-welding the outer peripheral flange portion 2A. It is manufactured by joining the inner circumference 2B of the portion 21 by tightening. A mixing pipe portion 22 is extended in the radial direction from the outside of the lower portion of the annular head portion 21, and the tip of the mixing pipe portion 22 is a supply port 23 (see FIG. 3) for fuel gas and primary air. The annular head portion 21 has an upper portion serving as a passage for a mixture of fuel gas and primary air, and a lower portion serving as a cylindrical skirt portion 2S. On the upper surface of the annular head portion 21, an air outlet 24 is formed annularly on the inner circumference, and an annular installation surface 25 of the burner body 2 is provided on the outer circumference in an inverted conical surface shape.

In the annular head portion 21, a part of the annular head portion 21 is crushed in the vertical direction to form a flat portion on the side opposite to the extending direction of the mixing pipe portion 22, and a communication port 20 with the lower side is provided. An open recess 26 is formed. The recess 26 forms a lower space of the auxiliary combustion chamber 12. In this embodiment, the communication port 20 has a fan-shaped planar shape, the flat portion is formed so as to be inclined downward and is formed slightly above the middle of the annular head portion 21.

The spark plug 14 is erected so as to face the communication port 20, and the tip thereof is set lower than the communication port 20, and a spark discharge gap is formed between the spark plug 14 and the ground electrode 30 projectingly provided on the lower surface of the burner cap 3. Is forming. The thermocouple 13 is erected in parallel with the thermocouple 13 in a state in which an upper end portion, which is a temperature sensitive portion, projects from the communication port 20 into the auxiliary combustion chamber 12. Thermocouple 1
Coated lead wires 41 and 42 are connected to 3 and the spark plug 14, and these coated lead wires 41 and 42 are connected to an electric device (not shown).

The burner cap 3 is provided with an annular projection 31 on the outer periphery of the lower surface. A portion of the annular projection 31 corresponding to the auxiliary combustion chamber 12 is a recess 32, which forms an upper space of the auxiliary combustion chamber 12. The annular protrusion 31 is
It has comb teeth 33 arranged in a row in the radial direction.
The space is a slit array having a predetermined depth. When the burner cap 3 is placed on the burner body 2, the annular protrusion 3
The lower surface of 2 abuts on the annular installation surface 25, and the slit array forms the annular flame port array 11. A small number of slits facing the sub combustion chamber 12 are ignited by the spark plug 14 and form a sub flame port 15 for heating the thermocouple 13.

In this embodiment, an opening 17 with a heat shield tube 16 is formed in the center of the burner cap 3, and a pan bottom temperature sensor 18 for the food to be cooked is concentrically provided. On the lower surface of the burner cap 3, long comb teeth 34, 34 that partition the annular protrusion 31 and the recess 32 are formed. The long comb teeth 34, 34 are sandwiched between the stepped walls 28, 28 between the annular installation surface 25 and the recess 26, and are positioned for determining the proper mounting position of the burner cap 3 with respect to the burner body 2. It is a mechanism.

Below the burner body 2, a thermocouple 13 and a stay 4 for attaching a spark plug 14 are installed.
The thermocouple 1 is attached to the stay 4 via the mounting leaf springs 43 and 44.
3 and the spark plug 14 are attached. Above the mounting stay 4, a flame prevention plate 5 is mounted to partition the lower side of the communication port 20 from the lower space of another burner body 2.

The flame prevention plate 5 has an inner peripheral wall 27 of an annular head portion 21 of the burner body 2 in which the communication port 20 is provided.
, A substantially notched circular bottom plate 51 that is horizontally arranged with a gap G, radial side plates 52 and 53 standing from both sides of the bottom plate 51, an inner wall plate 55 in the chord direction, and an inner wall plate. An eaves plate portion 56 is formed by bending the upper end of 55 toward the center and contacts the bottom of the inner circumference 2B of the annular head portion 21.

The flame prevention plate 5 is fixed in the burner body 2 below the communication port 20 and forms a flameproof section 50 surrounding the communication port 20. The flameproof compartment 50 communicates downward mainly through the gap G. In this embodiment, the flame prevention plate 5 is fixed by sandwiching a pair of brackets 57 and 58 extending outward from the bottom plate 51 between the outer peripheral flange portion 2A and the mounting stay 4. Has been done. The mounting stay 4 and the outer peripheral flange portion 2A are the long holes 2C provided in the outer peripheral flange portion 2A,
Insert bolts 2D and 2D into 2C, and attach the stay 4
It is fastened by being screwed into a screw hole (not shown) provided in the.

Next, the operation of the flame prevention plate 5 will be described.
When the ignition operation is performed during use of the stove, spark discharge is generated by the spark plug 14, the mixture gas ejected from the auxiliary flame port 15 is ignited, and the flame is transferred to the annular flame port array 11 for combustion.
The thermocouple 13 is heated by the flame of the auxiliary flame port 15 to raise the temperature, and the electromotive force keeps the electromagnetic safety valve open to continue normal combustion. At the time of ignition, secondary air is supplied from the gap G to facilitate ignition.

When the burner cap 3 is removed for cleaning or the like and is placed again, the placement position of the burner cap 3 with respect to the burner body 2 is set to be displaced in the rotational direction, and the user performs the ignition operation without noticing it. There are cases. At this time, the upper space of the auxiliary combustion chamber 12 is formed in a portion other than the recess 32 of the burner cap 3. For this reason,
The air-fuel mixture rising in the burner body 2 is burned in the burner cap 3 in the sub-combustion chamber 12 where the upper part is replaced.
Along the lower surface and the inner surface of the annular projection 31 and blows downward.

As a result, a downward flame that blows downward is formed, and a part of the downward flame enters the flameproof compartment 50 through the communication port 20. In this case, the flame prevention plate 5 makes it difficult for the downward flame to enter the flameproof compartment 50 from the communication port 20, and also prevents the downward flame from further entering from the flameproof compartment 50. As a result, it is possible to prevent a trouble in which the spark plug 14, the coated lead wires 41, 42 of the thermocouple 13, and other electrical equipment are deteriorated or burned by the flame.

If the heated object of the stove burner 1 is a pan,
Boiled juice may enter the auxiliary combustion chamber 12 due to the overflow. When this broth enters the flameproof compartment 50 through the communication port 20 and stays inside, it causes problems such as corrosion. For this reason, a gap G is provided between the flame prevention plate 5 of the annular head portion 21 and the inner peripheral wall 27 as a boiling water outlet. This gap G
Has a function of causing the broth that has entered the flame-proof compartment 50 to flow down below the burner body 2, and the secondary air is sucked into the flame-proof compartment 50 through the gap G, and the secondary combustion chamber 12 from the communication port 20. And the function of being supplied to. In addition, the gap G is
Since the width is narrow, it is possible to effectively prevent the flame that has entered the flameproof compartment 50 from being blown downward from the gap G due to the quenching action.

[Brief description of drawings]

FIG. 1 is a sectional view of a stove burner.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a perspective view of a burner body.

FIG. 4 is a plan view of a burner body.

FIG. 5 is a bottom view of the burner body.

[Explanation of symbols]

 1 stove burner 2 burner body 3 burner cap 4 mounting stay 5 flame prevention plate 11 annular flame nozzle row 12 auxiliary combustion chamber 13 thermocouple 14 spark plug 20 communication port 21 annular head of burner body 27 inner peripheral wall 41, 42 coated lead Line 50 Flameproof section G Gap (boiled liquid outlet)

Claims (3)

[Claims] 1. A burner body having an annular head portion is detachably mounted with a burner cap on the annular head portion to form an annular flame port array, and the annular head region is formed in a part of the annular flame port array. In the stove burner that has a communication port communicating with the lower side of the communication port, and is provided with a sub-combustion chamber with an ignition device or a misfire sensor facing the communication port, the underside of the communication port has penetrated from the communication port. A stovetop burner that is equipped with a flame prevention plate to prevent flames. 2. The flame prevention plate according to claim 1,
A stovetop burner characterized in that a flameproof section communicating with the communication port is formed inside the annular head, and a boiling water outlet is provided in the flameproof section. 3. The soup outlet according to claim 2,
A stove burner characterized by a gap provided between the flame prevention plate and the inner peripheral wall of the annular head.