▎ 摘　　要

NOVELTY - The tube (1000) has a heating cable (Q) inserted into a hollow (F1) and connected to a power cable (C10) through a connection unit (70) to receive power and generate heat, where heat radiation particles are filled in the hollow and heated together with heat of the heating cable. The heating cable comprises a carbon fiber yarn heating cable (Q10). The connection unit is fixed with a power core wire wrapped with a power cover of the power cable. A sealing is fused and covered with a sleeve in a center from the power cover to a fiber yarn coating (Q12). A connection terminal comprises a connection piece that is fixed with the power core wire and a connection pin, where the tube is made of metal, stainless steel or synthetic resin capable of heat conduction and conductive solution comprises mixture of 97 to 99 wt.% of graphite and 1 to 3 wt.% of graphene in mixture of 1:1 wt.% of diluent and binder. USE - Flexible heating tube for a water tank or piping line on a roof in house or livestock facility. ADVANTAGE - The tube maximizes thermal efficiency as a double function of heat storage and heat radiation of heat radiation grains while acting as a heating element. The tube applies loess grains, ceramic grains, germanium grains, or charcoal grains as heat radiation grains to radiate radiant heat and far-infrared rays while being heated when the heating cable is heated, and to heat storage, thus improving service life of the cable. The tube provides suction pressure from a side of the tube after inserting the heating cable into a hollow of the tube, and inserts heat radiation grains into other side of the tube so that heat radiation particles are quickly and simply filled into the hollow of the tube, thus improving assembly and productivity. The tube ensures maximization of heat conduction and radiant heat radiation by metal of the tube and prevention of corrosion by stainless steel of the tube with light weight by synthetic resin of the tube, thus ensuring easy production with thermal efficiency. The tube protects a carbon fiber yarn with a weak structure as a spaced crimping portion, thus protecting the carbon fiber yarn and satisfying connection power of a power core. The tube maximizes electrical connection power between a power core wire and the carbon fiber yarn by including conductive liquid that penetrates into the carbon fiber yarn in a fiber yarn coating. The tube improves workability while ensuring strength and light weight when installed on a floor of a room. DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a flexible heating tube. Connection unit (70) Flexible heating tube (1000) Power cable (C10) Hollow (F1) Heating cable (Q) Carbon fiber yarn heating cable (Q10) Fiber yarn coating (Q12)