An electronic expansion valve (EXV) used in a refrigeration cycle for a heat pump or chiller is controlled to maintain minimum pinch for ensuring proper flooded cooler exchange performance by monitoring the delta temperature between the cooler fluid and the saturated suction temperature. The discharge...http://www.google.de/patents/US6318101?utm_source=gb-gplus-sharePatent US6318101 - Method for controlling an electronic expansion valve based on cooler pinch and discharge superheat
