Unpowered smokeless stove

An unpowered smokeless stove, comprising a housing, an inner barrel, and a top ring, the inner barrel is placed on the housing by means of the top ring;

• the inner barrel comprising an outer wall and a thermal insulation layer, the outer wall comprising an outer layer and an inner layer, a side of the inner layer being provided with combustion holes and air inlet holes, the thermal insulation layer includes a first thermal insulation layer, a second thermal insulation layer, a third thermal insulation layer, and a fourth thermal insulation layer, a first gap being arranged between the inner layer and the outer layer, a second gap being arranged between the first thermal insulation layer and the second thermal insulation layer, the air inlet holes are arranged between the first thermal insulation layer and the second thermal insulation layer;
• wherein the combustion holes include first combustion holes and second combustion holes, and the first combustion holes and the second combustion holes are annularly arranged at an upper part and a middle part of the inner layer respectively.

An unpowered smokeless stove, comprising a housing, an inner barrel, and a top ring, the inner barrel is placed on the housing by means of the top ring;

• the inner barrel comprising an outer wall and a thermal insulation layer, the outer wall comprising an outer layer and an inner layer, a side of the inner layer being provided with combustion holes and air inlet holes, the thermal insulation layer includes a first thermal insulation layer, a second thermal insulation layer, a third thermal insulation layer, and a fourth thermal insulation layer, a first gap being arranged between the inner layer and the outer layer, a second gap being arranged between the first thermal insulation layer and the second thermal insulation layer, the air inlet holes are arranged between the first thermal insulation layer and the second thermal insulation layer;
• wherein a first spacing slot and a second spacing slot are disposed at a top and bottom of the housing respectively, the top ring forms ventilation holes, the air enters the housing through the first spacing groove and the second spacing groove respectively, and is discharged through the ventilation holes.