| 摘要 |
PURPOSE:To prevent a positive--pressure generating means from no-load running, by respectively controlling the pressure in a first and a second accumulators to a positive-pressure set value or a negative-pressure set value and by applying a load to the positive-pressure generating means with closing a valve. CONSTITUTION:An output terminal of a compressor 10, a positive-pressure generating means, is connected to a first accumulator 13 via a chick valve 12. The first accumulator 13 is connected to a second accumulator 16 via valves 14 and 15, and the second accumulator 16 is further connected to an input terminal of the compressor 10 via a check valve 17. The pressure in the first and the second accumulators 13 and 16 are respectively detected by a first and second pressure detection means 21 and 22. The valves 14 and 15 and other valves 18 and 19 are controlled by an electronic controlling unit 30 to control the pressure in the first and the second accumulators 13 and 16 to a positive- pressure set value or a negative-pressure set value respectively. At least one of the valves 18 and 19 is then closed to apply a load to the compressor 10. A medical apparatus is connected between the valves 14 and 15 via an adapter 50. |
