Abstract: A heater for coating removal heating a metal member having a surface coated with a coating film, includes a high-frequency power source; a transformer transforming a high-frequency current outputted from the high-frequency power source; and a plurality of heating units, each heating unit being detachably connectable to the transformer to heat the metal member disposed in contact with or near the heater for coating removal by the high-frequency current outputted from the transformer. One heating unit is selected from the plurality of heating units and attached to the transformer. The inductance value of the plurality of heating units except for the selected heating unit is adjusted to be within a predetermined range relative to the inductance value of the selected heating unit.

Abstract: A heater for coating removal heating a metal member having a surface coated with a coating film, includes a high-frequency power source; a transformer transforming a high-frequency current outputted from the high-frequency power source; and a plurality of heating units, each heating unit being detachably connectable to the transformer to heat the metal member disposed in contact with or near the heater for coating removal by the high-frequency current outputted from the transformer. One heating unit is selected from the plurality of heating units and attached to the transformer. The inductance value of the plurality of heating units except for the selected heating unit is adjusted to be within a predetermined range relative to the inductance value of the selected heating unit.

Abstract: A superheated steam generator includes an introduction section for introducing saturated steam into hollow pipe members arranged as steam flow passages and acting as inductively heated elements, and a discharge section for discharging superheated steam from the flow passages, wherein a turbulence generator is disposed in each of the steam flow passages to accelerate heat transfer to the steam in the pipe members, wherein the turbulence generator is a zigzag bent member disposed in the steam flow passage, and a zigzag bending pitch of the bent member changes from rough to minute from the introduction section to the discharge section.

Abstract: [Object] To improve an overall heat transfer efficiency of a heating element and steam and a heating efficiency of the stream by making a distribution of input heat non-uniform by executing a less expensive improvement such as a change of disposition of an induction heating member. [Solving Means] In a superheated steam generator 30 including an introduction section 11 for introducing saturated steam 5, a heating section 12 for heating the saturated steam 5 and making it to superheated steam 6, a discharge section 16 for discharging the superheated steam 6, and an induction coil 31 wound around a heating pipe member 13 through insulators 18 in the heating section 12, the induction coil 31 is wound rough near to the introduction section 11 and minute near to the discharge section 16.