The utility model belongs to the technical field of equipment for heat treatment, a heating device is related to, especially relate to a three -dimensional light -condensation heat collector of solarenergy. The on -line scrubbing apparatu, including the vacuum tube, U type bellows, reflector panel and location mounting panel, the quantity of vacuum tube be at least 3 and evenly arrange in succession, all be provided with U type bellows in every vacuum tube, the filling has heat -conducting medium in the U type bellows, adjacent U type bellows interconnect, every vacuum tube all is provided with the reflector panel outward, the reflector panel is concentric circular arc with the vacuum tube, the arc angle of reflector panel is 150~170, adjacent reflector panel passes through rivet connection, the quantity of location mounting panel is 2, and be U type structure, and fix respectively in the vacuum tube both sides. Utilizing this device, realizing that vacuum tube 360 absorbs solar energy, collecting efficiency is high, is located the inside U type bellows of vacuum tube, effectively carries the high pressure heater thermal efficiency, long service life, and the usage is wider.