JP2764004B2 - Burner for stove - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove burner used for a stove such as a build-in stove or a table stove.

[0002]

2. Description of the Related Art Generally, a stove burner is provided with a burner body at the tip of a mixing tube, a burner top mounted on the burner body, and a thermocouple and a spark plug mounted on the outer periphery of the burner body. It is formed. The thermocouple detects the presence or absence of combustion by detecting the temperature.When combustion is detected, the valve is opened to supply gas, and when combustion is not detected, the valve is closed to shut off gas supply. Has become. By the way, in the structure where the thermocouple and the spark plug are simply provided on the outer periphery of the burner main body, the draft of the air in the appliance, the opening and closing of the appliance door (grill door, oven door, cabinet door, etc.) and the oven Sensitive to pressure changes caused by fans. In other words, when the combustion near the thermocouple is temporarily extinguished or the flame is blown up due to the draft or opening and closing of the door or the pressure change by the oven fan, the thermocouple does not detect heat and the gas supply is shut off. There is a problem that it is done.

Conventionally, a stove burner as shown in FIG. 5 has been provided to solve the above problem. The rectifying plate 3 is attached to the lower part of the outer periphery of the burner main body 2 of the mixing pipe 1 at a position corresponding to the sub-combustion chamber, and the thermocouple 4 and the ignition plug 5 penetrate the bottom plate 3a of the rectifying plate 3. , And an air hole 6 for supplying secondary air is formed in the side plate portion 3b of the current plate 3.

[0004]

In the above-mentioned prior art, the thermocouple 4 and the spark plug 5 are attached to the current plate 3 so as to penetrate them without any gap, so that the thermocouple 4 and the spark plug 5 are prevented from being affected by drafts of air. Can be the current plate 3
There is a problem that another part is required. Further, since the air holes 6 for supplying the secondary air to the sub-combustion chamber are provided in the flow straightening plate 3, the influence of the pressure change such as opening and closing of the door affects the sub-combustion chamber through the air holes 6 and the opening and closing of the door. However, there is a problem that it is impossible to cope with the pressure change caused by the pressure. Rectifier plate 3
Is provided with an air hole 6, but there is also a problem that dimensional accuracy of the air hole 6 is severely required in order for the thermocouple 4 and the spark plug 5 provided adjacently to operate normally.

The present invention has been made in view of the above problems, and an object of the present invention is to enable a thermocouple to normally operate without being affected by drafts, opening and closing of doors, and pressure changes by a fan of an oven. Providing an operating stove burner.

[0006]

In order to achieve the above object, a stove burner according to the present invention is provided with a burner body 2 at the tip of a mixing tube 1 and a burner top 3 mounted on the burner body 2. In a stove burner in which a thermocouple 4 for detecting combustion and a spark plug 5 are provided on the outer periphery of the burner main body 2, the thermocouple 4 is provided on the outer periphery of the burner main body 2.
And the ignition plug 5 are mounted so as to penetrate vertically at different locations, respectively, and the diameter of the insertion hole 7 for inserting the thermocouple 4 into the burner main body 2 is reduced so that the hole edge of the insertion hole 7 and the thermocouple 4 between the outer and the minimum limit gap S ₁ for inserting a thermocouple 4, also by increasing the diameter of the insertion hole 8 for inserting the spark plug 5 and the hole edge of the insertion hole 8 and the outer periphery of the spark plug 5 characterized in that by forming a gap S ₂ for relief wide pressure spaced between.

[0007]

According to the above arrangement, the pressure change during the opening and closing of the draft and the door can be released by the gap S ₂ for relief wide pressure spaced (combustion with the pressure change after the ignition in the vicinity of the spark plug 5 temporary However, secondary air required for combustion can be supplied from the outer periphery of the burner main body 2 to the vicinity of the thermocouple 4. Thereby, the influence of the pressure change due to the opening and closing of the draft and the door does not affect the combustion in the vicinity of the thermocouple 4, so that the thermocouple 4 can operate normally.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIGS. The stove burner is mainly composed of a mixing tube 1 and a burner top 3 mounted on a burner main body 2 at the tip of the mixing tube 1. The mixing tube 1 is formed by sheet metal, and is assembled by integrating the upper plate 1a and the lower plate 1b by caulking or the like. A mixing pipe 10 and an annular burner pipe 11 are provided in the mixing pipe 1.
The portion provided with the annular burner duct 11 is the annular burner main body 2. A flange 12 is provided on the outer periphery of the mixing tube so as to protrude outward, and the upper plate 1a and the lower plate 1b are integrated by joining the flange 12 of the upper plate 1a and the flange 12 of the lower plate 1b in an overlapping manner. It has been turned. A gas nozzle 13 for supplying gas to the mixing pipe 10 is disposed at a base end of the mixing pipe 10 of the mixing pipe 1.
Is provided with an air port 14 for primary air, and a damper 15 for adjusting the amount of primary air is disposed in the air port 14.

The burner top 3 is mounted on the burner main body 2 of the mixing tube 1, and an annular space 16 is formed around the entire circumference between the burner top 3 and the burner main body 2. The annular space 16 communicates with the burner conduit 11 of the burner main body 2, and a flame hole 17 provided around the entire periphery of the burner top 3 communicates with the annular space 16.
Further, the burner top 3 is provided with an auxiliary flame hole 18 communicating with the upper surface, and the auxiliary flame hole 18 and the annular space 16 are communicated. A sub-combustion chamber 19b for ignition and a sub-combustion chamber 19 for combustion detection are provided on the outer periphery of the burner top 3 and the burner body 2.
a are provided at separate locations at an interval, and the auxiliary flame holes 17a and 17b of the flame hole 17 are respectively provided in the auxiliary combustion chambers 19a and 19a.
Opened at 19b. An insertion hole 7 through which the thermocouple 4 is inserted is provided on the outer periphery of the burner main body 2 at a part where the sub-combustion chamber 19a is provided, and a spark plug is provided at an outer periphery of the burner main body 2 at a part where the sub-combustion chamber 19b is provided. An insertion hole 8 for inserting the hole 5 is formed. This thermocouple 4
The insertion hole 7 for inserting the spark plug 5 is formed so as to have a small size, and the insertion hole 8 for inserting the ignition plug 5 is formed so as to increase in size.

A terminal plate 20 is arranged below the outer periphery of the burner main body 2 of the mixing tube 1, and the terminal plate 20 is attached to the mixing tube 1 by a fixed spring 21. The thermocouple 4 is inserted through the insertion hole 7, the ignition plug 5 is inserted through the insertion hole 8, and the thermocouple 4 and the ignition plug 5 are attached to the terminal plate 20 by the fixed spring 22. The upper end of the thermocouple 4 is opposed to the auxiliary flame hole 17a, and the electrode 5a at the upper end of the ignition plug 5 is connected to the burner top 3.
Of the electrode projection 23. Thermocouple 4
Is inserted into the center of the insertion hole 7, and the size of the insertion hole 7 is small, so that a required minimum gap S ₁ is formed between the hole edge of the insertion hole 7 and the outer periphery of the thermocouple 4. ing. The limited gap S ₁ is a minimum gap required for the thermocouple 4 to pass therethrough. Although the ignition plug 5 is inserted into the center of the insertion hole 8, a large pressure relief gap S ₂ is formed between the hole edge of the insertion hole 8 and the ignition plug 5 because the insertion hole 8 is large. This pressure relief gap S
₂ is a sufficiently wide space, and can release pressure sufficiently by passing a large amount of air at a time. The thermocouple 4 detects the presence / absence of combustion in the auxiliary flame hole 17a by detecting the temperature. When the combustion in the auxiliary flame hole 17a is detected, the valve is kept open to release gas. When the supply is stopped and the combustion in the auxiliary flame hole 17a is no longer detected, the valve is closed to shut off the gas supply. When the pressure change due to fan opening and closing the oven draft and doors in a state that is burned in the burner occurs, the pressure on the mixing tube 1 from the bottom of the mixing tube 1 through the gap S ₂ for pressure relief escapes. As a result, even if the flame from the auxiliary flame hole 17b where the ignition plug 5 is located may be temporarily extinguished, the flame from the auxiliary flame hole 17a where the thermocouple 4 is located will not be extinguished. In other words, the change in pressure can be absorbed by the pressure relief for clearance S _2,
The flame is not suddenly extinguished in the auxiliary flame hole 17a. Thus, the thermocouple 4 always operates normally, and the combustion does not go out.

[0011]

As described above, according to the present invention, the thermocouple and the spark plug are attached to the outer periphery of the burner main body so as to penetrate the burner main body vertically at different places. Reduce the diameter so that the gap between the hole edge of the insertion hole and the outer periphery of the thermocouple is the minimum clearance for inserting the thermocouple, and increase the diameter of the insertion hole for inserting the spark plug and increase the diameter of the insertion hole. A wide gap for pressure relief is formed between the rim and the outer periphery of the spark plug, so pressure changes due to drafts, opening and closing of doors and oven fans can be released in the wide gap for pressure relief. (There is no problem even if the combustion temporarily disappears due to the above pressure change after ignition in the vicinity of the spark plug.) In the vicinity of the thermocouple, secondary air necessary for combustion is supplied from the outer peripheral portion of the burner body. The thermocouple can operate normally without the effects of pressure changes due to drafts, opening and closing of doors, and oven fans affecting combustion near the thermocouple. As described above, a rectifying plate is not required, and the number of components can be reduced. Further, unlike the conventional rectifying plate, severe dimensional accuracy is not required, and manufacturing is easy.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AOB of FIG.

FIG. 3 is a sectional view taken along line OC of FIG. 1;

FIG. 4 is a perspective view as seen from the back surface of the same.

FIG. 5 is a sectional view of a conventional example.

[Explanation of symbols]

1 mixing tube 2 burner body portion 3 burner top 4 thermocouple 5 spark plug 7 through hole 8 through hole S ₁ restriction gap S ₂ pressure relief for clearance

Claims (1)

(57) [Claims] A stove having a burner body at the tip of a mixing tube and a burner top mounted on the burner body, and a thermocouple for detecting combustion and a spark plug provided on the outer periphery of the burner body. In the burner, a thermocouple and a spark plug are attached to the outer periphery of the burner main body so as to penetrate vertically at different locations, and the diameter of the insertion hole for inserting the thermocouple into the burner main body is reduced to make the hole of the insertion hole. The gap between the edge and the outer periphery of the thermocouple is a minimum limiting gap for inserting the thermocouple, and the diameter of the insertion hole for inserting the ignition plug is increased so that the gap between the edge of the insertion hole and the outer periphery of the ignition plug is increased. A stove burner, characterized in that a wide gap for pressure relief is formed in the burner.