JP2547614Y2 - Ignition device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition device for various types of gas combustors ignited by a heater.

[0002]

2. Description of the Related Art Such an ignition system will be described below with reference to FIG. Pre-purge air or air-fuel mixture forcibly sent by the fan 3 is blown from the surface of the burner plate 11 to the ignition heater 51 installed facing the place where the flame a of the all-primary gas burner 1 should be. Then, the heater 51 is considerably cooled. Then, the ignition heater 51 may not reach the ignition temperature required for ignition.

[0003]

Prevents the cooling of the heater 51 [devised is to solve the above, the eliminating ignition misses the gas burner 1 always kept above the temperature of the heater 51, the added flame
The purpose is to ensure that the flame is kept .

[0004]

Means for Solving the Problems The present invention for solving the above problems.
The proposed ignition device is provided with a mixing gas spouting from the burner 1 (10).
A heater 51 for ignition to be exposed in the heat flow,
Obstructs the straight flow of the mixed gas upstream of the mixed gas flow of
It is necessary to provide a baffle plate 54 for generating a vortex on the back surface.
To the effect. Further, the ignition device according to the second aspect is the first aspect of the invention.
In the device described, one or more of the baffles 54 may be provided.
The point is to have the through-hole 55.

[0005]

[Action] A heater is exposed in a mixed gas flow, and the heater is located upstream of the heater.
On the side that prevents the mixed gas flow from going straight
Since a magic plate is provided, the mixed gas flow
And the mixed gas flow is blocked
A vortex is generated on the magic plate. Therefore, the heater
And the degree of ignition failure due to temperature drop is prevented.
Can be stopped. Also, the ignited flame due to the eddy current on the baffle plate
The flame ignited for a moment is a burner flame
Problems such as blowing out and extinguishing before igniting the mouth
Can be prevented. In addition, one or more through-holes
Since the heater was drilled near the position facing the heater,
The amount of air-fuel mixture going to the air is adjusted to improve the ignition rate
Rukoto can.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

FIG. 1 shows an all-primary gas burner 1 in which a combustion plate 11 provided with a large number of flame openings is fixed to the middle of a combustor main body. 3 are connected. The open end of the gas supply pipe 2 faces and is fixed to the suction side of the blower fan 3.
An electromagnetic valve 8 is installed in the supply pipe 2. Then, a fin tube type heat exchanger 4 is used by the flame a of the gas burner 1.
Are to be heated. An ignition heater 51 in which a heating resistor 52 is sealed substantially orthogonal to the air-fuel mixture in the flame a.
The ignition heater 51 and the electromagnet valve 8 are connected to a burner controller 7 while being held and fixed with insulator 53 while maintaining insulation. A baffle plate 54 slightly wider than the heater 51 is disposed between the heater 51 and the combustion plate 11 so as to be substantially parallel to the heater 51, and blocks a gas flow to the heater 51. And heater 5
1 is in a state where the tip is slightly protruded. Most of the air-fuel mixture passing through the heating resistor 52 passes near both outer sides, and a part of the air-fuel mixture is almost stagnant as a vortex (see arrow b in FIG. 4). Air-fuel mixture passes through the tip as much as necessary for ignition. Therefore, the heating resistor 52
Is cooled very little, the required ignition temperature is maintained, and the mixed gas is ignited at its tip.

Next, as shown in FIG. 2, the gas burner 1 is of a Bunsen type in which secondary air is supplied. The heater 51 and the baffle plate 54 are slightly moved toward the tip during the flame a0 of the gas burner 10. The figure shows a case where it is attached and fixed in a state of being inserted so as to be inclined upward.

As described above, the case where the baffle plate 54 has no through-hole is shown. However, a plurality of through-holes 55 are formed near the position of the baffle plate 54 facing the heater 51 (see FIG. 6 ) or slightly larger. Amount of air-fuel mixture passing through the heating resistor 52 with one through hole
Is adjusted, so that the ignition rate can be further improved.
The ignition device according to the present invention is effective when the flow velocity of the mixer is large in the forced air type or forced intake type gas combustor shown in FIG.

[0010]

As described above, according to the igniter according to the present invention, the amount of combustion gas passing through the heater is reduced, the heater can be maintained at a required ignition temperature or higher, and the temperature of the heater decreases. This has the effect of eliminating the drawback that ignition failure due to ignition occurs. Also, the ignited flame is a baffle
The flame is reliably held, and no blowout occurs.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an application example of a gas combustor for explaining an embodiment of an ignition device according to the present invention.

FIG. 2 is a schematic front view showing an application example of a gas combustor for explaining another embodiment of the present invention.

FIG. 3 is a schematic front view showing an application example of a gas combustor for explaining a gas ignition device showing an ignition device in a conventional example.

FIG. 4 is a schematic side view of an essential part for explaining an operation state of the embodiment of the ignition device of the present invention.

FIG. 5 is a schematic enlarged top view of a main part showing an embodiment of the ignition device according to the present invention.

FIG. 6 is a schematic enlarged top view of a main part showing a different embodiment of the ignition device according to the present invention.

[Explanation of symbols]

 1, 10 Gas burner a, a0 Flame 5 Ignition device 51 Heater 52 Heating resistor part 54 Baffle plate 55 Through hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A mixed gas ejected from a burner 1 (10)
A heater 51 for ignition facing the flow, and a straight line of the mixed gas flow is prevented upstream of the mixed gas flow of the heater 51.
A baffle plate 54 for generating a vortex on the back side.
Ignition device and butterflies. 2. The method according to claim 1, wherein the baffle plate has one or more through holes.
The ignition device according to claim 1, further comprising: