| 摘要 |
PROBLEM TO BE SOLVED: To prevent drain water from leaking out of a drain receiving pan in an abnormality by securely detecting water level even if the abnormality occurs in a float and a switch. SOLUTION: The drain water produced according to cooling operation is accumulated in the drain receiving pan. When the level of the drain water is raised and a second floating body 61 rises to a high water level, a controller 50 determines that the drain receiving pan is full of water by using an output from a second detector 63. When the cooling operation is stopped, a pump 8 is also stopped. When the the high water level cannot be detected, the water level is further raised up to an abnormal level. A first floating body 60 is raised and an arm 66 comes into contact with a third detector 64. A power supply from a power source circuit 69 to the controller 50 is cut off to stop the operation of the controller 50 so as to stop the the cooling operation. COPYRIGHT: (C)2006,JPO&NCIPI |
