Patent ID: 8550147
Filing Date: 2013-10-08
Classification: B60H,B60S,F01P

Abstract:
1. In combination with an automotive vehicle having an engine coolant system and a fluid windshield wiper cleaning system, a windshield washer fluid heater comprising: a housing having two ends which defines a housing chamber, a subhousing disposed in said housing chamber, said subhousing being constructed of a thermally conductive material and dividing said housing chamber into an outer housing chamber between said housing and said subhousing and an inner housing chamber inside said subhousing, said inner and outer housing chambers being fluidly isolated from each other, a core disposed in said inner housing chamber which forms an annular chamber between said core and said subhousing, a washer fluid inlet on said housing open to one end of said annular chamber and a washer fluid outlet on said housing open to the other end of said annular chamber, said washer fluid inlet and said washer fluid outlet being fluidly connected to the windshield wiper cleaning system, an engine coolant inlet fluidly connected to the coolant system and open to said outer chamber and an engine coolant outlet fluidly connected to the coolant system and open to said outer chamber at a position spaced from said inlet so that most of the coolant flow into said coolant inlet flows through the outer housing chamber and out through the coolant outlet, wherein said core is dimensioned such that the ratio of wetted surface area of the annular chamber to the volume of the annular chamber exceeds 700 meters