JPS6215643Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas ignition device for directly igniting a main gas burner without using a pilot burner, and aims to improve ignition performance.

Most of the above conventional ignition devices are as shown in FIGS.
As shown in the figure, an electrode plate 2 made of a flat plate is arranged parallel to the longitudinal direction of the flame hole 1 on the outside of the flame hole 1 close to the flame hole 1, and a discharge gap 3 is provided on the side of the flame hole 1 of this electrode plate. The spark plug 4 was placed in the opposite position. In this case, the supply of secondary air to the discharge part is obstructed by the electrode plate 2, so the ignition rate decreases due to fluctuations in gas supply pressure. The heat-receiving area of the electrode plate 2 was large, and it was necessary to pay attention to the durability of the electrode plate.

The present invention has been devised in view of the above points, and will be explained below with reference to FIGS. 3 and 4.

Reference numeral 5 designates a main gas burner used in gas instantaneous water heaters, etc., which is formed by bending a pair of sheet metals and joining their peripheral edges to form a slit-shaped flame hole 6 and a mixing tube 7. 8
is an electrode plate made of a heat-resistant metal flat plate that is installed on the outside of the approximately middle part in the longitudinal direction of the flame hole 6 at a substantially right angle to the longitudinal direction of the flame hole 6, and has a small gap 9 between it and the flame hole 6. I'm leaving it there. 10 is the flame hole 6 of the electrode plate 8.
This is a discharge plug in which electrodes 12 are disposed facing each other with a discharge gap 11 in between, and the tip 13 of the electrode 12 faces above the flame hole 6.

As a result, a discharge is generated between the tip 13 of the electrode 12 and the electrode plate 8 adjacent thereto, and ignition combustion is performed in the flame hole 6 by supplying gas to the main gas burner 5. Furthermore, when gas is ejected from the flame hole 6, air is sucked in from the outside, but since the electrode plate 8 is disposed approximately perpendicular to the longitudinal direction of the flame hole 6, the above suction can be carried out quickly. The ignition rate can be increased by widening the gas concentration range in the discharge portion.

As mentioned above, the gas igniter according to the present invention has an electrode plate arranged on the outside of the flame hole of the main burner, which is provided with a slit-shaped flame hole, and approximately perpendicular to the longitudinal direction of the flame hole. In addition, since the discharge plug is disposed above the flame hole of the electrode plate with a discharge gap, the area of the electrode plate that receives heat from the flame can be set to be small, and the durability of the electrode plate can be improved. In addition, by almost eliminating the obstruction of secondary air supply by the electrode plate,
A uniform combustion flame can be formed and the ignition rate can be improved.

[Brief explanation of the drawing]

1 is a perspective view and a side view of the main part of the conventional example shown in FIG. 2, FIG. 3 is a perspective view of the present invention, and FIG. 4 is a side view of the main part. 5... Main gas burner, 6... Flame hole, 8... Electrode plate, 10... Discharge plug, 11... Discharge gap.

Claims (1)

[Scope of utility model registration request] A main burner with a slit-shaped flame hole, an electrode plate disposed on the outside of the flame hole close to the flame hole of the main burner approximately perpendicular to the longitudinal direction of the flame hole, and a discharge gap placed between the electrode plates. A gas igniter consisting of a discharge plug and a discharge plug facing each other and placed above the flame hole.