Patent ID: 6422310
Filing Date: 2002-07-23
Classification: F25B,F25D,F28F

Abstract:
A constant temperature coolant circulating apparatus for supplying a coolant in a circulating manner to a heat load connected through an outside pipe to cool said heat load, a temperature of said coolant being controlled,wherein said circulating apparatus comprises a primary-side flow path for sending said coolant to said heat load through said outside pipe and a secondary-side flow path for receiving said coolant flowing back from said heat load through said outside pipe, a check valve for preventing backflow of said coolant in said outside pipe into said circulating apparatus when operation is stopped and a cubical expansion relief valve which opens to let a part of said coolant flow back to said circulating apparatus when pressure of said coolant in said outside pipe increases excessively are connected in parallel to each other and a purge check valve for blowing compressed gas into said outside pipe in recovering said coolant in said outside pipe is connected in said primary-side flow path.