 |
|
 PRINCIPLES OF OPERATION In addition to supplying oil pressure to the compressor lubrication system, the compressor oil pump also provides oil pressure to operate the compressor capacity control system, which is controlled automatically. Externally mounted solenoid valves, controlled by a signal from a remote device provide reliable response to system load. Loading the cylinders one by one as required, increase compressor capacity. Similarly, unloading one or more cylinders, as and when required, can reduce the compressor capacity. An internal oil passage in the oil pump end bearing housing of the compressor is connected to an internal passage in the compressor solenoid valve plate. Capacity control solenoid valves BSV-1 are mounted on this plate. During de-energized condition of the solenoid valve BSV-1, oil flows to unloader power element to load the compressor. During the energized state, due to release of this oil pressure, compressor gets unloaded and the oil backed up in unloader power element flows back to oil sump. Thus, solenoid valve type BSV-1 is de-energized to load the compressor and energized to unload the compressor.  |
