As a cooker, users often see simple differences in appearance, such as the number of batteries. As far as technical means are concerned, one battery or two batteries are mostly the difference of flameout protection technology.

The infrared range adopts DC electromagnetic valve, which has three working states: suction, holding and release. When attracting, the solenoid valve has to overcome the resistance of the return spring, so it is generally designed according to 3V DC, and needs two R20 batteries (commonly known as 1 battery) for power supply. When the battery power is insufficient, the electromagnetic valve cannot be sucked, the gas cannot enter the combustion chamber, and the pulse air discharge cannot be ignited. The power required in the holding state is small, so the infrared furnace rarely extinguishes fire in the middle of combustion.

Thermocouple solenoid valves are often used in ordinary cookers and do not need battery drive. When the flame heats the thermocouple, the thermocouple will conduct the generated thermoelectric electromotive force to the solenoid valve winding, so that the solenoid valve keeps a state and the gas continuously passes through. The attraction of the thermocouple solenoid valve is not driven by the battery, but is pushed upward by the ejector pin designed in the ignition assembly when the knob is turned. Because the battery only participates in ignition, not control, so one battery is enough. However, the biggest disadvantage of this technology is that thermocouples are mixed. Many thermocouples age after a year or two, and the generated thermoelectric potential is not enough to overcome the resistance of the spring. The electromagnetic valve will reset unexpectedly and die, which is manifested on the cooker.

The hollow range of burner is an important problem of combustion technology. The infrared stove is completely premixed, and the primary air mixing amount is large, so the cavity of the stove is large; Ordinary cookers absorb primary air and secondary air at the same time, so the cavity of the burner is small. But in terms of combustion efficiency, infrared stoves are much higher than ordinary stoves.