| 摘要 |
PURPOSE:To aim at protection of auxiliary machinery at the time of lock occurrence in a compressor, by constituting a transfer relationship between an engine and the compressor so as to be released if a revolving speed pulse of the compressor is less than the setting value at a time when the detecting pulse number of engine revolving speed reaches to the setting value. CONSTITUTION:Both revolving speeds of an engine 1 and a compressor 2 are detected each by photo-couplers S1 and S2, converted into a pulse number each by pulse generating circuits P1 and P2, and pulse counters C1 and C2, and inputted into a control unit 7 which compares the pulse number C2 of the compressor 2 with the compressor setting value when the pulse number C1 to an engine speed is reached to the setting value. And, when it is below the setting value, a solenoid clutch 5 is turned off, cutting off the rotational driving relationship between the engine 1 and the compressor 2. With this constitution, protection of engine auxiliaries is well promoted. |
