2results about How to "Large transfer area" patented technology

The utility model discloses a cylindrical fin heater, which comprises a cylindrical flow guide pipe and heat conducting fins, a liquid inlet sealing cover and a liquid outlet sealing cover are respectively screwed and fixed on two sides of the cylindrical flow guide pipe through bolts, and a plurality of groups of heat conducting fins are arranged in the cylindrical flow guide pipe. A plurality of water inlets and water outlets are formed in the liquid inlet sealing cover and the liquid outlet sealing cover respectively, the two ends of the heat conduction fins are communicated with the water inlets and the water outlets respectively, first electric heating pipes are arranged in the heat conduction fins, and second electric heating pipes are arranged at the positions where the heat conduction fins are communicated with the water inlets and the water outlets. A plurality of groups of heat-conducting fins are arranged in a cylindrical flow guide pipe, first electric heating pipes are arranged in the heat-conducting fins, and the heat-conducting fins can increase the heat transfer area, so that heat is more effectively transferred from the electric heating pipes to a flowing liquid medium, accumulation of the heat on the surface of the heater is reduced, and the efficiency of transferring the heat to a target area is improved; and energy waste is reduced.

This invention discloses a rear frame structure for a vehicle cargo box and its assembly method, belonging to the field of automotive manufacturing technology. The structure connects the cargo box crossbeam assembly and the rear outer panel assembly to form a composite beam, with three-dimensional limiting socket interfaces at both ends. The left and right rear pillar assemblies of the cargo box are equipped with matching sockets, which can be inserted vertically into the interfaces to achieve automatic guidance and horizontal limiting, greatly simplifying assembly. After socketing, a combination of internal welding and external bolts ensures strength and utilizes bolt preload to actively level surface differences. The cargo box crossbeam assembly adopts a U-shaped cross-section design, with built-in support plates and pre-set suspension mounting points, improving overall rigidity and assembly accuracy. This invention effectively solves the problems of poor welding quality, low assembly accuracy, and poor appearance matching in traditional cargo box rear structures.