3results about How to "Increase cooling surface" patented technology

The present application relates to cable technical field, and disclose a kind of flame-retardant polyethylene cable, including multiple conductors, further comprising: multiple conductors are mutually fixed by filling block, and multiple circumferentially uniform distribution material reduction grooves are arranged in the outer wall of filling block;Fixedly connected with the inner sheath of filling block outer wall, the outer sheath is connected with the outer sheath of inner sheath outer wall, and annular structure storage groove is arranged between the inner sheath outer wall and the outer sheath inner wall, and the outer sheath is fixedly connected with the inner sheath by compression ring, and the storage groove is separated into multiple independent chambers along the conductor axis direction by compression ring;The present application can reduce the material between adjacent threading holes by material reduction groove, reduce the accumulation of heat in filling block, and the filling rope is placed in material reduction groove, can absorb the heat generated by local overload, delay temperature rise, improve short-time current carrying capacity, store flame-retardant gas in chamber, when flame burns chamber, carbon dioxide stored in the interior can be ejected from the flame of break, so as to inhibit combustion and reduce flame propagation ability.

The utility model provides a kind of hollow large current inductance and PCB circuit board, this hollow large current inductance includes base, magnetic core and coil, the magnetic core includes shell and magnetic column, the coil is wound the magnetic column and the shell surrounds the coil, the base includes installation platform and support column, the installation platform is used to install the shell, the support column is used to support the installation platform to make the installation platform overhang.This PCB circuit board includes PCB board and hollow large current inductance.Because shell is installed on installation platform, support column supports installation platform again, magnetic core and coil are all overhung, increase a heat dissipation surface.Finally realize the purpose of improving large current inductance heat dissipation efficiency.Embodiment of the utility model in PCB circuit board can realize a kind of PCB circuit board that can consider heat dissipation and improve electronic component integrated density.

This utility model discloses an evaporation and concentration device for preparing inorganic salts, including a reaction vessel, a stirring device, spiral evaporation blades, a rotary evaporator, a circulation pipe, a circulation pump, and a heat exchanger. The stirring device is disposed inside the reaction vessel, and the rotary evaporator is connected to the stirring device. The spiral evaporation blades are connected to the inner wall of the reaction vessel and cooperate with the rotary evaporator. The two ends of the circulation pipe are connected to the bottom of the reaction vessel and the rotary evaporator, respectively. The circulation pump and the heat exchanger are connected to the circulation pipe. This evaporation and concentration device for preparing inorganic salts has a simple structure and is convenient and practical. The reaction liquid is introduced into the annular overflow channel of the rotary evaporator through the circulation pipe, so that the reaction liquid overflows into the annular disk and spreads quickly, thereby increasing the heat dissipation surface and improving the concentration speed.