| 摘要 |
PURPOSE:To stabilize air conditioning by a method wherein a plural number of thread springs having different spring constants and free lengths are arranged in a low pressure chamber in a spool made in a bypass hole communicating an intake chamber with a compression chamber. CONSTITUTION:A spool 19 for opening and closing a bypass hole 11 is arranged in the bypass hole 11 communicating an intake chamber with a compression chamber and a plural number of thread springs 22A, 22B having different spring constants and free lengths are arranged in a low pressure chamber 21 in a spool 19. With this arrangemenet, the spring force is low during the time when the bypass hole 11 is open and in turn is strong while it is closed, so that the bypass hole 11 is varied from its open condition to its closed condition under a comparatively small variation in pressure difference, and in turn a comparatively large variation in pressure difference is required to vary from its closed condition to its open condition. Therefore, a hysteresis can be reduced more than that of the conventional type and a more stabilized air conditioning can be obtained. |
