Patent ID: 6233955
Filing Date: 2001-05-22
Classification: F25B,F25D,Y02B

Abstract:
An isothermal coolant circulating apparatus comprising a coolant circuit section for cooling coolant returned from a load to a predetermined temperature to supply the coolant to the load, a refrigerating circuit section for cooling the coolant, and a controlling section for controlling the temperature of coolant for supplying to the load,wherein said refrigerating circuit section comprises a hot gas circuit for adjusting the cooling capacity of refrigerant for supplying to an evaporator by mixing low-temperature refrigerant for supplying to the evaporator with a portion of high-temperature refrigerant discharged from a compressor; and an isobaric expansion valve for adjusting the circulating rate of refrigerant in the hot gas circuit,wherein said coolant circuit section comprises a coolant tank; a heat exchanger for cooling coolant returned from the load by means of the evaporator; temperature-adjusting means for adjusting coolant to supply to the load to a predetermined temperature by coolant cooled in the heat exchanger and coolant returned from the load; and circulating means for supplying coolant cooled to a predetermined temperature to the load to circulate the coolant, andwherein said controlling section comprises a temperature controller for controlling the temperature adjusting means.