Patent ID: 9583225
Date: 2017-02-28
CPC Classifications: B23K,G21C,H01S,Y02E

Claim:
1. A laser irradiation apparatus disposed in water and performing maintenance/repair using a laser, the apparatus comprising: an environment isolation container configured to be disposed in a maintenance/repair object provided with water inside; a laser oscillator provided inside the environmental isolation container, the laser oscillator being configured to be isolated from the water in the maintenance/repair object via the environmental isolation container; a laser irradiation head which collects laser light and irradiates a part to be machined with the laser light; a light guide section which transmits the laser light from the laser oscillator to the laser irradiation head; a power supply apparatus which supplies the laser oscillator with power; an air-chamber partition for dividing inner space of the environment isolation container into a first space in which the laser oscillator and a path of the laser light are disposed, and a second space outside the first space; a pipe communicating the second space with the laser oscillator; a cooling water supplying apparatus which supplies the laser oscillator with cooling water through a cooling water supplying path; and a temperature sensor which measures temperature inside the environment isolation container, wherein at least one of temperature and flow rate of the cooling water to be supplied from the cooling water supplying apparatus is controlled based on measurement result obtained from the temperature sensor; and the cooling water supplied from the cooling water supplying apparatus passes through the laser oscillator and is then supplied to the second space through the pipe.