| 摘要 |
PURPOSE: A freezing preventive system for washing fluid is provided to prevent washing fluid from freezing by heating washing fluid with a heating unit in circulating washing fluid, and to eliminate inconvenience by obtaining the visual field of a driver. CONSTITUTION: A freezing preventive system of washing fluid comprises a temperature sensor(11) detecting temperature of washing fluid in a washer tank(1) and outputting signals according to detected temperature; a heating unit(13) heating washing fluid in receiving power; a three-way valve(15) having an inlet connected to a supply pipe(3) connected from a discharge port of a washer pump(5), and outlets connected to the supply pipe connected to a washer nozzle(7); a circulating pipe(17) having an inlet connected to the outlet of the three-way valve and an outlet connected to the washer tank to circulate washing fluid in the washer tank; and a control unit(19) deciding freezing of washing fluid according to the signal from the temperature sensor, supplying or shutting off power to the heating unit and the washer pump, and opening one of outlets of the three-way valve. Freezing of washing fluid is prevented by heating washing fluid with the heating unit.
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