Automotive water heater

An automotive water heater, applying to a windshield of an automobile, and producing hot water that is sprinkled on the windshield to melt snow and frost, comprising:

• a laminated heating unit, electrical property is conducted by means of a heating strip joined to plate electrodes, and outwardly separated by an insulating plate, a front end of the heating unit is joined to a heat conducting surface of an exchange unit, and a rear end of the heating unit is sealed with a sealing back plate;
• a compression plate, the compression plate compresses the sealing back plates;
• the exchange unit, the exchange unit comprises an exchange bed, the heat conducting surfaces are located on the exterior of the exchange unit, the interior of the exchange unit is provided with parallel water flow paths spaced at intervals by a plurality of heat conducting ribbed plates, thereby configuring water stream flow paths, front and rear ends of each of the flow paths are sealed by two front and rear seal end covers, the interior of the two front and rear seal end covers, corresponding to the position of each of the end openings of two adjacent flow paths, is provided with a turnaround area, thereby enabling turnaround streams to be formed, and pipe orifices which enable water to flow in and out thereof are located at the front seal end cover at the front end of the exchange unit.