| 摘要 |
PURPOSE:To prevent surging, heighten the lifetime of constituent parts and keep noises from sharply increasing, by smoothly introducing liquid from a second chamber into a first one depending on the temperature of the atmosphere on a fan. CONSTITUTION:A separator 8 having an opening 8a in the center is secured between a case body 3 and a case cover 4 so that the space in the fan case 2 is divided into a first and a second chambers 7a, 7b. A communication hole 8b is provided. Supports 10, 11 have such spring force that they can move in the directions of arrows D, E. The supports 10, 11 are provided with valve sections 12, 13. A communication hole 12a is provided in the valve section 12 of the support 10 so that the hole is opened or closed by the valve section 13 of the other support 11. The first chamber 7a is provided with a drive disc 17 secured on the tip of a drive shaft 1. A bimetal 15 is mounted on the peripheral part of the cover 4 of the fan case 2. |
