| 摘要 |
PURPOSE:To enable to collect warmth for a large number of persons through a structure wherein reflecting plates consisting of four continuous faces composed of two parabolas connected with each other at the meets of the two parabolas, of the first parabola which has a heater unit located at the focus and the second parabola which has its focus in common with the focus of the first parabola and is symmetrical with the first parabola with respect to the focus. CONSTITUTION:The titled electric stove is equipped with two sheets of reflecting plates consisting of combined parabolas 14-a and 14-b, which are generated by describing a first parabola f(x) having a focus P and a second parabola g(x), which has the focus P in common and is symmetrical with respect to the focus P so as to bend the two parabolas at the meets Q and R of the two parabolas f(x) and g(x). A heater unit 11 is provided at the location of the focus P. When a switch is turned ON, the vertical type heater unit 11 is energized, resulting in paralleling the generated heat by reflecting with a pair of the reflecting plates 14-a and 14-b and emitting the parallel radiant heat simultaneously in two directions of a main body. When the electric heater is positioned between two warmth-collecting persons sitting side by side, the radiant heat can be sent to the two persons without heating tables and the backs of chairs. |
