What are the flameout protection devices for cooking stoves in commercial kitchen equipment?

The most dangerous thing in kitchen equipment is the stove, because it uses an open flame to heat food directly. For safety purposes, flameout protection devices for gas stoves are very necessary, and relevant national standards also have mandatory regulations on this. At present, there are three flameout protection methods commonly used in the market: thermal, thermoelectric and photoelectric. 1. The heat-sensitive type, also known as the bimetallic type, is made of two metals with different expansion coefficients. Under the action of temperature, the metal side with a large expansion coefficient will bend to the side with a small expansion coefficient. At temperature, the originally expanded and bent metal will slowly return to its original state. Therefore, the bimetal is also called a memory alloy. The advantages of the bimetal protection device are simple structure and low cost. The disadvantage is that it is difficult to install. The installation position of the metal sheet and the cooperation of the plug valve and the gas valve have high requirements, and the thermal inertia is large, the valve opening and closing time is long, and the service life is short. Therefore, the frequency used in the production of stoves by Foshan Kitchenware Factory Relatively few; 2. Thermoelectric type: The device also uses the heat generated by the combustion of gas. It is composed of two parts: a thermocouple and a solenoid valve. The thermocouple is composed of two different alloy materials. Different thermoelectric potentials are generated under the action of temperature. Thermocouples are manufactured by using different thermoelectric potentials produced by different alloy materials under the action of temperature. It uses the difference in electric heating of different alloy materials. The structure of thermoelectric safety protection device Simple, convenient to install, and low cost, but this kind of protection device uses thermocouple as the thermal sensor, the disadvantage is that the thermal inertia is large, the reaction speed is slow, it makes people feel inconvenient to operate, and the service life is short. The plug valve and solenoid valve are installed in cooperation The accuracy requirements are high; 3. The photoelectric type is also called the ion induction type. This device uses gas to carry ions and has unidirectional conductivity when the flame is burning. This safety protection method was first applied to gas water heaters and has been The development of the early DC induction to the current AC induction has greatly improved the reliability. Previous: How to develop the overall layout of the kitchen equipment of Foshan Kitchenware Factory Next: What are the hygiene requirements for roughing and cutting of kitchen equipment in the catering industry?