NOVELTY - A silent air inlet channel comprises bottom layer silencing material comprises acrylic resin, silica powder, coupling agent, chlorinated polyethylene, butyronitrile rubber, borax, magnesium powder, diatomaceous earth, and aluminum hydroxide. The surface layer silencing material comprises phenolic resin, silica powder, coupling agent, chlorinated polyethylene, butyronitrile rubber, glass fiber, magnesium powder, nickel powder, diatomaceous earth, and aluminum hydroxide.    USE - Silent air inlet channel for solar energy hot air flow vertical shaft generation.    ADVANTAGE - The silent air inlet channel achieves convergence acceleration, and has excellent solar energy hot air flow generation rate.    DETAILED DESCRIPTION - The silent air inlet channel comprises hot air flow sunlight greenhouse is set with hot air flow with a chimney. A bottom periphery ring of heat air flow chimney is provided with multiple horn openings which are set with air inlet channel. The air inlet channel comprises vertical section. The air inlet channel is vertically set with vertical shaft of turbofan power generation unit. A lower end of vertical section is connected with air inlet. An upper end of the vertical arc section is connected with hot air flow through the chimney. The air inlet channel is set in hot air flow sunlight greenhouse. A transition section is provided between the vertical section and air inlet of the air inlet channel. An inner wall of air inlet channel is covered with sound absorbing layer. The silencing layer comprises bottom layer silencing material and surface layer silencing material. An internal portion of bottom layer is set with first silencing cavity. The internal surface is set with the second sound attenuation cavity. The silencing cotton is uniformly filled in two cavities. The bottom layer silencing material comprises 10 pts. wt. acrylic resin, 6 pts. wt. silica powder, 2.5 pts. wt. coupling agent, 1.2 pts. wt. chlorinated polyethylene, 0.8 pt. wt. butyronitrile rubber, 2.5 pts. wt. borax, 3.5 pts. wt. magnesium powder, 4 pts. wt. diatomaceous earth, and 3.5 pts. wt. aluminum hydroxide. The surface layer silencing material comprises 15 pts. wt. phenolic resin, 8 pts. wt. silica powder, 2.5 pts. wt. coupling agent, 1 pt. wt. chlorinated polyethylene, 0.8 pt. wt. butyronitrile rubber, 3 pts. wt. glass fiber, 3.5 pts. wt. magnesium powder, 0.3 pt. wt. nickel powder, 2.8 pts. wt. diatomaceous earth, and 3.5 pts. wt. aluminum hydroxide.