Abstract: A variable capacity stack-type brake resistor including at least one resistance module having one or more heating elements therein, one control module including a substrate electrically connected to the heating elements, an inlet port connected to a fluid inlet on one side of the resistance module, and an outlet port connected to a fluid outlet on the other side of the resistance module, wherein the resistance module is provided in a box shape with flat upper and lower surfaces, and the control module is assembled in a stacked manner on the upper surface of the resistance module. According to the brake resistor, total capacity (capacity to consume energy) may be changed as desired by adjusting the number of resistance modules assembled in a stacked manner as needed, thereby satisfying the required specifications and responding quickly to requests for specification changes without major replacement or changes to production equipment.

Abstract: An independently-controlled PTC (Positive Temperature Coefficient) heater includes a PTC unit including first and second PTC elements for generating heat by an applied power, a guide frame having an opening to which the first and second PTC elements are mounted, first and second electrode plates configured to respectively make surface contact with one surfaces of the first and second PTC elements which are exposed through the opening, a common electrode plate configured to make surface contact with the other surfaces of both the first and second PTC elements which is exposed through the opening, and an insulation member configured to insulate the first electrode plate, the second electrode plate and the common electrode plate from an outside; and a heat diffusion fin provided at a side of the heating tube.

Abstract: An independently-controlled PTC (Positive Temperature Coefficient) heater includes a PTC unit including first and second PTC elements for generating heat by an applied power, a guide frame having an opening to which the first and second PTC elements are mounted, first and second electrode plates configured to respectively make surface contact with one surfaces of the first and second PTC elements which are exposed through the opening, a common electrode plate configured to make surface contact with the other surfaces of both the first and second PTC elements which is exposed through the opening, and an insulation member configured to insulate the first electrode plate, the second electrode plate and the common electrode plate from an outside; and a heat diffusion fin provided at a side of the heating tube.