CIRCULATION AND DRAIN SYSTEM

摘要

An evaporative cooler circulation and drain system including a fluid pump and a storage tank defining an interior volume for holding a fluid is disclosed. In one aspect, the system is operable between a circulation and drain-circulation operational modes. In the circulation mode, a drain valve is closed and the fluid pump is activated such that fluid is continuously circulated within the storage tank to discourage debris from settling by keeping debris in the tank in suspension. In the drain-circulation mode, the drain valve is opened and the fluid pump is activated such that fluid is both being continuously circulated within the interior volume of the storage tank and draining from the tank. In some embodiments, the system increases the drain flow rate by directing circulated fluid directly at a drain opening of the tank to flush debris through the drain piping and prevent plugging.