Resistor, a heat dissipater and a combinatory device of resistor and heat dissipater

A resistor, wherein which is cylindrical, and comprises a metal end, an insulating part, a casing made of a metal material, a first metal bar, a second metal bar, a resistor wire received inside a cavity defined by the casing, thermally conductive insulating fillers, a metal connection mechanism, the relationships of the parts are as below:

• the cavity in which the resistor wire is placed is filled with thermally conductive insulating fillers both ends of the resistor wire are connected respectively to one end of the first metal bar and one end of the second metal bar which stretch into the casing;
• the other end of the second metal bar is connected to the metal end as one head end of the resistor, the other end of the first metal bar is reliably connected to the metal connection mechanism as the other head end of the resistor, the metal connection mechanism is directly connected to an end of the casing with equal electric potentials;
• a portion of the second metal bar is exposing out of the casing, spaces between an inner diameter of one end of the casing and the portion of the second metal bar and the metal end are sealed with insulating materials,
• wherein a space between the inner diameter of one end of the casing connected to the metal connection mechanism and the first metal bar exposing out of the casing is filled with insulating materials.