Exhaust heat recovery system

An exhaust heat recovery system comprising:

• an evaporator;
• an expander;
• a condenser;
• a pump;
• a circulation flow path that circulates a working medium between the evaporator, the expander, the condenser, and the pump;
• a cooling medium pipe that is connected to the circulation flow path and allows a portion of the working medium sent out from the pump to flow in the condenser;
• a bypass pipe that communicates between the evaporator and the condenser by bypassing the expander and sends the working medium flowed out of the evaporator to the condenser;
• a first valve that opens and closes the bypass pipe;
• a second valve that switches between a state in which the working medium is allowed to flow in the cooling medium pipe and a state in which the working medium is not allowed to flow therein;
• and a controller configured to perform a switching control of the second valve;
• wherein
• the controller is configured to control the second valve to switch to the state in which the working medium is allowed to flow in the cooling medium pipe when a condition under which both a temperature of the working medium flowing in the condenser becomes higher than or equal to a predetermined temperature and the first valve is opened is satisfied.