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(11) | EP 0 823 598 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | In-ceiling type air conditioner having controller for upward and downward motion of elevating panel |
| (57) An in-ceiling type air conditioner (50) including an unit body (2) which contains
a heat exchanger (16) and an air blower (10) and is mounted in the ceiling (1), a
decorative panel (7) provided on the ceiling face, an elevating panel with an air
filter (24) which is upwardly and downwardly moved by an elevating motor (140), a
driver circuit for supplying an operating current to the elevating motor to rotate
the elevating motor (140) forwardly and backwardly, a controller (160) for outputting
a control signal to the driver circuit and controlling the driver circuit (305) on
the basis of the control signal, a consumption current detector for detecting the
consumption current (307) of the elevating motor (140) at all times to output a detection
result to the controller (160), and a timer (309) for counting a predetermined time
and outputting the count result to the controller (160). When the consumption current
detected by the consumption current detector exceeds a predetermined value during
the upward or downward motion of the elevating panel, the controller outputs an operation
stop instruction to the driver circuit to stop the rotation of the elevating motor
(140) and thus stop the elevating panel. |