JPS6242289Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an ignition device, in which a discharge electrode, a pilot burner, and a thermal element are integrally sintered on a support base made of fired porcelain to improve ignition performance, thermoelectromotive force generation, and maintenance, and ensure insulation with the equipment body.
The purpose of this integration is to ensure an effective positional relationship for the above performance.

In a conventional gas igniter, the discharge electrode, pilot burner, heating element, and support stand were each manufactured individually, and fixation was dependent on screws and metal fittings such as holding fittings. Therefore, the difficulty of maintaining relative position,
The increase in the number of parts increases the cost, and since it is fixed to metal, it is electrically connected to the main body of the device, making it difficult to improve the quality of the device by making full use of electronic circuits.

The present invention aims to improve these drawbacks, and one embodiment of the present invention will be described below with reference to the drawings. The gas ignition device of the present invention is made of porcelain, which is baked and hardened in a firing furnace in advance, and has a through hole 5 that supports the pilot burner 2, the heating element 3, and the discharge electrode 4.
The support base 1 with the support base 1 and the through holes 5 of the support base 1 are arranged so as to maintain an insulating distance effective against surges and the like even after the three components mentioned above are sintered.

The pilot burner 2 is made of stainless steel and has a tip that guides the flame to the heating element 3, supplies raw gas to the discharge electrode 4, has a protrusion 6 for discharging, and heats the tip of the discharge electrode 4 after ignition. A burner head 8 provided with a guide wall 7 is fixed by welding or the like so that the burner head 8 is not bent. 9
The part is for easy fixing and is U-shaped and has a width that matches the diameter of the pilot burner.

The burner head 8 is formed by providing notches at a constant interval A around the tip of the thermal element 3 in order to increase the electromotive force to the thermal element 3 and protect the electronic circuit from induced lightning.

As shown in Fig. 1, the pilot burner 2, heating element 3, and discharge electrode 4 are fixed to the support stand 1 by sintering in 10 parts.As a fixing aid, the pilot burner 2 is supported by extending one end of the burner head. The position is regulated by applying it to the end surface 11 of the lower end of the table 1,
The thermal element 3 presses the enlarged tube part 12 at the center against the support base 1, and inserts the E-ring 1 from the side opposite to the burner head 8.
It is temporarily fixed by 3. The discharge electrode 4 is the connector 14
The end face of the support base 1 is pressed against the support base 1, and the position is determined based on the difference in diameter from the hole diameter of the support base. 15 is the mounting base, 16
is a fixing screw for the support base 1.

In the above configuration, the pilot burner 2, the heating element 3, and the discharge electrode 4 have through holes 5 at predetermined intervals, an extension portion that is the U-shaped portion 9 of the burner head 8 that is the position regulating portion, an expanded tube portion 12, and a connection portion. The position in the axial direction and the circumferential direction is maintained correctly by the child 14, and ignition is ensured. Furthermore, since the thermal element 3 is inserted into the through hole 5 from the rear end, even if an adhesive is applied to securely fix it to the support base 1, the adhesive will absorb heat during the insertion process. The head of the thermal element 3 to be detected is not touched, and the performance can be stabilized. Furthermore, since the pilot burner 2 and the heating element 3 are inserted into the through hole 5 from the rear end, the circumferential spacing between them can be maintained appropriately, and good ignition performance can be maintained. That is, pilot burner 2,
Since the front end side of the thermal element 3 has a large diameter part, if it is inserted into the through hole 5 of the support base 1 from this front end side, the hole 5 will be large enough to match the large diameter part, and the pilot burner 2, A large gap will be created between the thermal element 3 and the small diameter part on the rear end side to be joined, and even if some means is taken to fill the gap, the positional relationship between the two must be properly adjusted during this work. It is difficult to maintain good ignition performance. However, in the case of the present invention, the pilot burner 2, the heating element 3
Since there is no gap as described above in each through hole 5, the positional relationship can be maintained correctly.

As described above, according to the present invention, the following effects can be obtained.

(1) By inserting and sintering each component into the integrally molded support base, the relative position of each component can be determined correctly through the through hole.

(2) By sintering, assembly man-hours and fixing hardware can be eliminated during the production process.

(3) Since the support base is made of porcelain, even if electronic circuits are used, they are insulated from the main body of the device, so it is possible to prevent electronic circuits from being caused by induced lightning, contributing to the improvement of the quality of the product.

(4) Since the thermal element is installed by inserting it into the support from the rear end of the element, for example, even if adhesive is applied to secure it more firmly to the support, it will stick to the head of the element during the insertion process. You can do it without any problems,
Performance can be stabilized.

[Brief explanation of the drawing]

1A, B, C, and D are a plan view, a front view, a left side view, and a right side view of an ignition device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the same. 1...Support stand, 2...Pilot burner, 3...
...Thermal element, 4...Discharge electrode, 5...Through hole, 6...
Convex, 7...guide wall, 8...burner head.

Claims (1)

[Scope of utility model registration request] Porcelain or the like having a discharge electrode, a pilot burner, a thermal element, a through hole that penetrates the discharge electrode and the pilot burner and is integrally sintered, and a through hole that allows the thermal element to penetrate from the rear end side and are integrally sintered. An ignition device comprising a support base and a regulating portion regulating the axial positions of the discharge electrode, the pilot burner, and the thermal element.