Stand-up stoves

It is a double helix ring made up of a set of copper foil. It has two intermediate layers, one of which goes into the furnace from the outside to the inside to help it burn, and the other layer goes out from the inside to the outside, and in the middle of the coil it is a furnace to burn, put the cooker on the pot to cook, and put a hot plate under it to reduce the heat. On either side of the twin solenoid are two miniature blowers, one blowing inwards and the other blowing outwards. When the cooker heats the bottom of the pot, fresh air is needed to enter continuously, and oxygen helps the combustion. Since there is a lot of heat in the exhaust gas after combustion, the heat will heat the copper foil, and the incoming fresh air will be heated by heat exchange, because the waste heat is when it is cooled by heat, the fresh air is heated and when the exhaust gas just leaves the furnace, the temperature of the cold fresh air entering the furnace is close to high temperature, so the thermal efficiency is particularly high.