Patent ID: 8276650

Claim:
A heat exchanger comprising: a core; a filtration system comprising a flexible filter configured to filter cooling air for the core, and a first and a second take-up roller attached to the filter, such that scrolling the filter in a first direction wraps the filter about the first take-up roller of and unwraps the filter from the second take-up roller, and scrolling the filter in a second direction wraps the filter about the second take-up roller and unwraps the filter from the second take-up roller; a first and a second compressed air filter cleaner each having at least one compressed air outlet, and being positioned adjacent to the first and second take-up rollers, respectively, such that upon activating the corresponding filter cleaner compressed air discharged from the at least one compressed air outlet is directed through the filter prior to the filter being wrapped about the corresponding take-up roller; a housing defining a cooling air inlet, and a first and a second cooling air outlet, and the filter extending across the cooling air inlet and each of the first and second cooling air outlets; and a fan positioned within the housing downstream from the core, such that rotation of the fan draws cooling air through the filter, the cooling air inlet, and the core, and pushes the cooling air out of the first and second cooling air outlets and the filter.