| 摘要 |
<p>An elevator installation comprising an elevator car 20 with an optical door sensor 100 and a cleaning unit 40 mounted in an elevator shaft 12, which cleans the sensor 100 as it passes. There may be an elevator controller that controls the speed of the car, which may be less than or equal to a limit clearing speed. The cleaning unit 40 may be mounted in a terminal portion of the elevator shaft 12 so that the cleaning takes place during a starting or stopping phase. The cleaning unit 40 may be selectively deployed from a rest configuration to a deployed configuration by means of a cam (60 fig. 5). The sensor 100 may comprise an emitter 101 and a receiver 105, each with its own cleaning unit 40. There may be a cleaning unit controller which initiates the cleaning operation and may monitor the service time of the car, the journey time of the car, the count of the car stops completed, the count of the car journeys and/or the distance travelled by the car. There may be a test module which may cause the cleaning controller to initiate a cleaning operation based on the output. The cleaning unit 40 can reduce the debris on the sensor 100 and can increase its performance.</p> |
