Control system of dual capacity compressor for e.g. air conditioning - has operation of reversible compressor motor controlled w.r.t. temp. with delay when reversed

摘要

The appts. uses a reversible motor compressor in a heat pump in a refrigerating or air conditioning system controlled to insure a delay during reversal of the direction of compressor operation. A control arrangement is provided which controls the direction of motor operation or compressor capacity in accordance with temperature conditions. The system can effect operation in a low capacity direction or condition, or alternatively in a high capacity direction or condition in response to differing sets of temperature conditions. A timer is provided for delaying the restart of the compressor motor for a predetermined time in response to the control system to initate a change in the operating direction or condition of the compressor when it restarts. The operation of the system in the different capacities is also subject to control in accordance with changes in ambient temperature.