초록 ▼

A check valve 27 for preventing backflow of a coolant 5 in outside pipes 14a and 14b into a tank 10 when operation is stopped, a cubical expansion relief valve 28 for suppressing increase of pressure of the coolant in the outside pipes 14a and 14b, and a purge check valve 29 for blowing compressed g

A check valve 27 for preventing backflow of a coolant 5 in outside pipes 14a and 14b into a tank 10 when operation is stopped, a cubical expansion relief valve 28 for suppressing increase of pressure of the coolant in the outside pipes 14a and 14b, and a purge check valve 29 for blowing compressed gas into the outside pipes 14a and 14b to recover the coolant are connected to a primary-side flow path for sending the coolant 5 to a heat load 1, a flow rate control valve 31 for controlling a flow rate or pressure of the coolant is connected to a secondary-side flow path for receiving the coolant 5 from the heat load 1, a bypass flow path 35 is provided between the primary-side flow path and the secondary-side flow path, and a bypass flow rate control valve 36 which opens when the pressure of the coolant in the outside pipes 14a and 14b exceeds prescribed pressure is connected in the bypass flow path 35.

대표청구항 ▼

1. 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 se

1. 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.