| 摘要 |
A windshield cleaning device for a windshield of a motor vehicle has a reservoir containing a cleaning liquid for washing the windshield. A pump is connected to the reservoir for pumping the cleaning liquid onto the windshield. A collecting device is provided for collecting and returning excess sprayed cleaning liquid, spray water, and rain water into the reservoir. A heat exchanger is provided for heating the cleaning liquid pumped by the pump by heat energy derived from the cooling water cooling the motor of the motor vehicle. A control circuit measures at least one temperature that can be the ambient temperature or the temperature of the cleaning liquid and allows pumping of the cleaning liquid onto the windshield only above a set temperature limit. A metering device automatically introduces an alcohol mixture, and optionally surface-active agents, into the cleaning liquid based on the measured temperature.
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