| 摘要 |
PURPOSE:To prevent a compressor from locking or vibrating at a low frequency due to oil lack by accelerating the frequency rising speed when the compressor is started. CONSTITUTION:The frequency of a compressor is rapidly raised up to a time t0 when the compressor arrives at the prescribed frequency f0 as shown in a characteristic curve (b), and when exceeding the prescribed frequency f0, it is smoothly raised or lowered. Thus, since the variation amount of the rotating speed is heretofore small at the compressor starting time, lubricating oil is not sufficiently circulated into the compressor to cause the compressor to be locked or vibrated at a low frequency. But this controller can prevent it and provides various advantages such as quick cooling or heating effect and elimination of noise at frequency altering time in an air conditioner. |
