Expandable drain pan

摘要

An expandable secondary condensate drain pan comprises a drainage basin formed by sidewalls that extend upwardly around a perimeter of the drain pan from a base. An expansion section allows portions of the base and sidewalls to be expanded or compressed. When located along a side of the drain pan, the base of the expansion section may be stepped such that the base at the side of the pan is higher than the base toward the center of the pan, allowing drainage to cascade away from the side of the pan. The expansion section may be strengthened against cracking by a relatively thin coating or film. A method for installing a pre-manufactured expandable secondary condensate drain pan under an air conditioning unit comprises adjusting the size of the drain pan, placing the drain pan on a support, and setting an air conditioning unit on the drain pan.

主权项

1. A secondary condensate drain pan for installation under an air handling unit, the secondary drain pan comprising:
a base; a continuous sidewall around a perimeter of the secondary drain pan extending upwardly from the base to form a continuous basin; and an expansion section within the basin comprising a plurality of upper fold lines and a plurality of lower fold lines, the expansion section configured to expand and collapse along the pluralities of upper and lower fold lines; wherein the expansion section includes portions of the base and portions of the continuous sidewall; wherein the secondary condensate drain pan is configured to capture condensate that overflows from a primary drain pan of the air handling unit that is mounted above the secondary drain pan; wherein, whether the expansion section is expanded or collapsed, the continuous sidewall is high enough, relative to the upper fold lines of the expansion section, to enable condensate to flow across the upper fold lines while remaining contained within the basin; and wherein the continuous basin comprises a drainage outlet, and the expansion section is configured to minimize pooling of drainage away from the drainage outlet as the basin provides a pathway for condensate to the drainage outlet.