gas cooker ignition

[stj]

Re: gas cooker ignition

hope the appliance has a thermocouple .

it has better than that, it has double gas valves a thermocouple, a fan sensor and a microcontroller tying it all together.

[capwizard]

Re: gas cooker ignition

I hope this will be helpful for you? Long neck 360° Flexible Neck Plasma Beam Lighter. see picture 1

Disassembly and schematic of an arc lighter.
https://www.youtube.com/watch?v=4aK1GK1KBGc

circuits inside the plasma lighter are as same as bug zapper! can be modify to a pocket TV LED tester.

[redwire]

Re: gas cooker ignition

A gas stove/range/cooker does not need flame sense.

In gas appliances such as furnace, hot water heater, clothes dryer etc. the igniter electrode is also the flame sensor electrode.
The Kanthal rod has a dual purpose - HV sparker and flame detect.

So you can add an igniter to the Miele, but it must also have flame sense in order to work properly.

[capwizard]

Re: gas cooker ignition

A gas stove/range/cooker does not need flame sense.

In gas appliances such as furnace, hot water heater, clothes dryer etc. the igniter electrode is also the flame sensor electrode.
The Kanthal rod has a dual purpose - HV sparker and flame detect.

So you can add an igniter to the Miele, but it must also have flame sense in order to work properly.

How about Silicone Carbide Ignitior. When it get red hot will low down the resistence then higher current could open the gas valve.

[redwire]

Re: gas cooker ignition

Silicon Carbide Hot Surface Igniter operates white hot 1800F and knowing its resistance would not tell you if a flame is present.
All metal's resistance increases with temperature. Burner controllers monitor current to know if the hot surface ignitor is broken, open circuit. They use a separate flame sensor rod with them.

You still need to know the flame is lit, or else an explosion danger if the gas solenoid stays on and gas builds up.

Flame sense is rectification/ionization for small appliances. Big big furnaces and industrial heaters use UV flame detection. Very sensitive, can detect a lit candle 20ft. away. Should be in kitchen smoke alarms.

I just wanted to make sure it's known the Miele module could do more than spark ignition only.

[capwizard]

Re: gas cooker ignition

Thank you.

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Pure metals typically have positive temperature coefficients of resistance. Coefficients approaching zero can be obtained by alloying certain metals. A negative coefficient for a material means that its resistance decreases with an increase in temperature.

Silicon carbide elements also change in resistance with temperature. The resistance is fairly high at room temperature, falls with increasing temperature to a minimum value at about 800°C, and then increases with temperature.

[stj]

Re: gas cooker ignition

the old ignitor had no feedback, it was / is just triac driven.
no different to the new one other than shape and only one secondary winding.
(and a fucked-up price)