THERMOSTAT THAT THE REACTIVITY THEREOF IS IMPROVED

According to an embodiment of the present invention, a thermostat with improved reactivity comprises: a thermostat case where one side is connected to a first flow path, and the other side is connected to a second flow path, and a third path is formed toward a side direction between the first flow path and the second flow path; a valve body having a mounting space in an inside where a first valve for opening and closing the first flow path is formed in one side, and where a second valve for opening and closing the second flow path is formed in the other side; an elastic member for making the first valve to close the first flow path by elastic supporting the valve body toward the first valve direction; and a driving part for moving the valve body according to contracting and expanding of a wax arranged in the mounting space of the valve body. A flowing conversion wall can be formed in a part corresponding to the third flow path of the valve body to move a fluid flowing through the second fluid path toward the opposite direction to the third flow path. Therefore, the flowing conversion wall formed on the valve guide can improve the whole reactivity in which the thermostat reacts to the temperature of a cooling water since the flowing conversion wall makes the cooling water to pass a wax case.