| 摘要 |
<p>PROBLEM TO BE SOLVED: To carry out the washing and replacing of an air filter easily and safely without the need for making workers enter the ceiling by lowering the air filter down to an arbitrary height of a chamber to be air conditioned. SOLUTION: An opening part 14 for the entry of an air filter 8 is located at a lower part of a filter case 13 housing a filter medium is bored in a lower plate of a casing 1 so as to be closed during the operation of air conditioning equipment and a vertically extensible guide mechanism is provided between both sides of the filter case 13 and an internal plate of the casing 1 to liftably hold the filter case 13. Moreover, the other end of a string 17 with one end thereof mounted on the filter case 13 is mounted on a winding drum 19 which is driven normally or reversely by a motor M. With the normal or reverse rotation of the motor M, the air filter 8 is lifted or lowered and hung down stayed still at an arbitrary height.</p> |
