Compressor Arrangement With Bypass Means for Preventing Freezing of the Cooling Unit

A compressor arrangement for generating compressed air by a motor-driven compressor unit, downstream of which is positioned at least one cooler unit for cooling the generated compressed air, which compressed air enters into the cooler unit via at least one inlet, flows through a cooling structure around which cooling air flows and which is composed of a plurality of parallel cooling ducts, and leaves the cooler unit via at least one outlet, and including a permanently open bypass pipe between the region of the inlet and the region of the outlet, the inner cross section of the bypass pipe is matched to the delivery capacity of the compressor unit and to the pressure difference between the inlet and the outlet in such a way that the bypass pipe generates a higher flow resistance than the cooling structure at normal ambient temperatures, whereas with progressive freezing of the cooling structure, the compressed air flows to an increasing extent via the bypass pipe in order to maintain the compressed air generation with a minimum loss of cooling and delivery capacity, and, furthermore, the bypass pipe is arranged relative to the cooler unit such that said bypass pipe is situated in the flow of the cooling air which flows through the cooler unit.