JPS605249Y2 - Ignition system in gas appliances - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an ignition device for gas appliances.

Generally, when gas pressure in gas appliances decreases, fire transfer becomes significantly worse.

Even if the pilot burner is lit, it is difficult to ignite the main burner or the flame transfers between the main burner flame holes.

Therefore, even if a fire transfer guide plate or the like is provided, there are problems such as incomplete combustion.

The present invention utilizes air purge to achieve smooth ignition due to its stirring effect.

This will be specifically explained with reference to an embodiment of the drawings.

Reference numeral 1 denotes an operating mechanism main body, which includes an electromagnetic safety valve 2, a pilot gas valve 3, an air purge valve 4, and a main gas valve 5, and is opened and closed via a cam 7 by operating an operating shaft 6.

FIG. 3 shows the order in which the cam 7 opens and closes the pilot gas valve 3, air purge valve 4, and main gas valve 5 by operating the operating shaft 6.

That is, when the operating shaft 6 is rotated, the cam 7 closes the electromagnetic safety valve 2,
Open the pilot gas valve 3 and air purge valve 4 to reach the pilot ignition position, which is a 90° rotation position.

Next, the cam 7 that further rotates the operating shaft 6 is the main gas valve 5.
At the same time, after opening the air purge valve 4 again,
The main ignition position is the rotational position.

When extinguishing a fire, a sloped surface is provided on the lower surface of the cam 7 to close the air purge valve 4.
The valve lever 8 contacts the inclined surface and slides the cam 7 in the axial direction, and the operating shaft 6 returns to the extinguishing position with the air purge valve 4 remaining closed.

The present invention has the above-mentioned configuration, and when the operating shaft 6 is rotated to the pilot ignition position at the time of ignition, the electromagnetic safety valve 2, the pilot gas valve 3, and the air purge valve 4 open and purge the air inside the main body 1. ) is ignited, the pressure on the electromagnetic safety valve 2 is released and the air purge valve 4 is closed to reach the 90° rotation position.

At this rotational position, that is, the pilot ignition position, the air purge valve 4 is closed, so only the pilot gas valve 2 is open and the pilot burner is ignited.

In this way, since the air purge valve 4 opens in the middle of the ignition operation rotation, the air purge burner, which releases a larger amount of gas than the pilot burner, is reliably ignited, and the pilot burner is also reliably ignited.

Next, when the operating shaft 6 is further rotated, the main gas valve 5 opens and the air purge valve 4 is also opened again, and the ejected gas agitates the pilot flame and the gas ejected from the main burner.

This stirring effect ensures that the pilot flame is transferred to the main burner, allowing smooth ignition.

Incidentally, as shown in FIG. 4, when switching the capacity in stages, the air purge valve 4 may be opened in each operation stroke.

Also, as shown in Figure 5, when changing the capacity from large capacity to small capacity, the burner is extinguished, so problems such as flame transfer do not occur, but when the capacity is switched from small capacity to large capacity when the capacity is reversed. Therefore, the air purge valve 4 should be opened at this time.

As described above, in this invention, the air purge valve is opened at the time of main ignition other than pilot ignition, or when switching from small capacity to large capacity, etc., so that the flame transfer to the main burner is prevented by the stirring effect of the air purge burner. ensured that
This allows for smooth ignition.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. FIG. 4 is a diagram showing the operation of each embodiment when switching the capacity, and FIG. 5 is a diagram showing the operation of each embodiment when switching from a small capacity to a large capacity. 3...Pilot gas valve, 4...Air purge valve, 5...Main gas valve, 6...
・Operation axis.

Claims (1)

[Scope of utility model registration request] An ignition device for a gas appliance, comprising a pilot gas valve, an air purge valve, and a main gas valve, the air purge valve being temporarily opened even during the main ignition stroke of an operating shaft.