| 摘要 |
A control system for mobile air conditioning systems for controlling the rat e at which the system compressor or clutch is cycled between operational and decreased refrigerant flow, by selectively controlling the response time of certain system control signals to flow dema nd changes including de-icing control, from interactions between de-icing control and flow control valves, as well as system overall control. Upon the detection of an icing condition, the response of the contr ol system is delayed to a degree to control the rate at which the capacity of the compressor can be cycled wi th in design limits. The delay feature allows the differential used in differentiating between icing and no n- icing conditions to be significantly reduced over that required in the prior art and thereby improving the performance of the air conditioning system. Icing conditions, or the likelihood thereof, can be determined by sensing the condition of the refrigerant flow from the evaporator In addition, the history of compressor cycling can be stored and used to prevent excessive cycling for any reason. |
