Patent ID: 8499551

Claim:
An exhaust heat recovering apparatus that recovers heat from an engine that generates exhaust air, and from the exhaust air, the apparatus comprising: a first circulating path configured to cool the engine down by a first heat medium circulated in the engine; a second circulating path configured to circulate a second heat medium; a heater that is disposed in the first circulating path, said heater configured to receive electricity, convert the electricity to heat, and apply the heat to the first heat medium; a first heat exchanger configured to exchange heat from the exhaust air with the second heat medium that circulates in the second circulating path; a second heat exchanger configured to exchange heat from the first heat medium with the second heat medium that circulates in the second circulating path; a tank configured to store heat of the second heat medium to which heat is applied by the first heat exchanger and/or the second heat exchanger; a temperature sensor that is disposed in the first circulating path, said temperature sensor configured to detect a temperature of the first heat medium after the heat from the first heat medium is exchanged by the second heat exchanger; a pump that is disposed in the second circulating path; and a controller configured to drive the pump according to the temperature of the first heat medium after the heat from the first heat medium, which is detected by the temperature sensor, is exchanged to circulate the second heat medium in the second circulation path, and controls a circulation rate of the second heat medium so as to make the temperature of the first heat medium after the heat from the first heat medium is exchanged, a predetermined temperature.