Patent ID: 6295819
Filing Date: 2001-10-02
Classification: F25B,H01L

Abstract:
An apparatus for alternately delivering hot and cold fluids to a devise, the apparatus comprising:a heat pump having a heating junction and a cooling junction;a single fluid circuit for holding a fluid and includinga hot channel passing by the heating junction of the heat pump for heating fluids in the hot channel, anda cold channel passing by the cooling junction of the heat pump for cooling fluids in the cold channel,wherein the hot channel and the cold channel are connected so that a single fluid passes by both the heating junction and the cooling junction of the heat pump;a pump interposed in the fluid circuit for circulating the fluid therein; anda valve interposed in the circuit between the hot channel and the cold channel for selectively and alternately delivering either heated fluid or cooled fluid to the devise without requiring switching of polarity of power delivered to the heat pump.