A spray gun is different from an igniter. According to relevant public information, flamethrower is a new type of outdoor ignition product, which belongs to an outdoor cooker. Igniter refers to a device that can provide enough energy to ignite pulverized coal and oil (gas) fuel in an instant and stabilize the flame. Igniter can be divided into commercial furnace and civil furnace. Commercial cookers are mainly used to ignite cooking stoves in catering kitchens. Due to the complex operating environment of catering kitchen, the choice of igniter for civil use is relatively strict.