A two-stage dehumidification air conditioning unit for railway vehicles

Abstract

The utility model provides a kind of two-stage dehumidification's air conditioning unit for railway vehicle, including controller and through pipeline sequential connection into the compressor, condenser and evaporator of refrigeration main circuit, it further includes the dehumidification circuit of being equipped with dehumidification supercooler and the switching valve of switching the series, parallel state of the dehumidification circuit and the evaporator;The import end and export end of the dehumidification circuit are sequentially arranged on the main circuit between the evaporator and condenser, and the switching valve is arranged on the main circuit between the import end and export end.The utility model provides a kind of two-stage dehumidification's air conditioning unit for railway vehicle, by controlling the series parallel relationship of dehumidification circuit and evaporator, in normal refrigeration, under the premise of not increasing energy consumption, two-stage dehumidification mode can be realized, reduce car relative humidity, and will not cause car temperature fluctuation;In dehumidification mode, while being high-efficiency dehumidification, it can also maintain temperature in car.

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