US 2009/0214193 A1Published application

Light emission type heating method and light emission type heating apparatus

AssigneeUshio Denki Kabushiki Kaisha

InventorsShinji SUZUKI, Kyohei Seki, Tetsuya Kitagawa

Life of this patent

Estimating the term…

Loading patent…

Abstract

A light emission type heating apparatus comprises a first lamp unit which includes two or more lamps, in which at least one of the lamps includes two or more filaments in its light emission bulb, and intensity of light emitted from each filament is independently controlled, and a second lamp unit which is made up of two or more lamps, and wherein the lamps of the first lamp unit are grouped, in each of which a filament of at least one of the lamps and a filament of another one of the lamps are arranged to form groups, wherein a temperature of the workpiece is detected, and electric power to be applied to each of the groups of filaments is controlled based on the detected temperature of the workpiece.

Claims9

Dependent claims

A light emission type heating method in which a workpiece is heated according to a predetermined heating pattern, using a light emission type heating apparatus, comprising a first lamp unit which includes two or more straight-bulb lamps arranged in parallel, in which at least one of the lamps includes two or more filaments in its light emission bulb, and intensity of light emitted from each filament can be independently controlled, and a second lamp unit which is made up of two or more straight-bulb lamps arranged in parallel, each of which has a filament, and wherein in the two or more straight-bulb lamps of the first lamp unit, in each of which a filament of at least one of the lamps and a filament of another one of the lamps are arranged so as to form a group, whereby as a whole, two or more groups of filaments are formed, the lamp emission type heating method comprising the following steps of:

detecting a temperature of the workpiece, and
controlling electric power to be applied to each of the groups of filaments which form the first lamp unit, based on the detected temperature of the workpiece.

A light emission type heating treatment apparatus for heating a workpiece according to a predetermined heating pattern by emitting light, comprising:

a first lamp unit including two or more of straight-bulb lamps arranged in parallel, wherein at least one of the lamps has two or more filaments arranged in an axis direction in its light emission bulb, and the two or more filaments are connected to respective lead wires from which electric power is applied to the two or more filaments individually;
a second lamp unit including two or more straight tube type lamps arranged in parallel;
wherein the first lamp unit and the second lamp unit form a two layer structure, and the first lamp unit is provided so as to directly face the workpiece,
a first driving section which applies electric power to the filaments of the two or more lamps which form the first lamp unit;
a second driving section which applies electric power to filaments of the two or more lamps which form the second lamp unit;
a first electric power controller which controls the first driving section;
a second electric power controller which controls the second driving section;
and
a temperature sensor which detects a temperature of the workpiece,
wherein the filaments of the lamps which form the first lamp unit are divided into two or more groups, in each of which a filament of at least one of the lamps and a filament of another lamp are formed so as to be a group,
wherein the first electric power controller is provided for each of the two or more groups, and
wherein the first electric power controller controls the first driving section based on the detected temperature of the workpiece by the temperature sensor.

9 more elements

Dependencies are inferred from the claim text.