Abstract: There are provided a conduit 9b for transferring a refrigerant to the evaporator 9, a conduit 7b for transferring an absorbent solution to the regenerator 3, and a branch conduit 9a. A check valve 17 is provided for communicating the branch conduit 9a to the conduit 7b. A check valve V3 is provided for allowing the flow from the absorber 2 to the regenerator 3. The valve 17 and the valve V3 are communicated at downstream side to each other. Those check valves maybe assembled in a single unit where a valve is arranged of a (free) ball shape and can be shifted by a pressure difference to switches each valve port, acting as a three-way valve. At the start-up or full condensation mode, the check valve 17 remains open while the check valve V3 is closed. This permits the refrigerant to flow from the condenser 9 via the branch conduit 9a to the regenerator 3.

Abstract: There are provided a conduit 9b for transferring a refrigerant to the evaporator 9, a conduit 7b for transferring an absorbent solution to the regenerator 3, and a branch conduit 9a. A check valve 17 is provided for communicating the branch conduit 9a to the conduit 7b. A check valve V3 is provided for allowing the flow from the absorber 2 to the regenerator 3. The valve 17 and the valve V3 are communicated at downstream side to each other. Those check valves maybe assembled in a single unit where a valve is arranged of a (free) ball shape and can be shifted by a pressure difference to switches each valve port, acting as a three-way valve. At the start-up or full condensation mode, the check valve 17 remains open while the check valve V3 is closed. This permits the refrigerant to flow from the condenser 9 via the branch conduit 9a to the regenerator 3.