Multi-stage door sealing and airflow release

A temperature door for an air handling system, comprising:

• a first surface;
• a pivoting structure defining an axis, wherein the first surface is configured to pivot about the axis in a housing of the air handling system;
• the first surface further comprising:
• a first radial edge and a second radial edge extending radially outwardly from the axis, and a distal edge spaced from the axis and extending between the first radial edge and the second radial edge;
• a first radial sealing lip disposed on the first radial edge;
• a second radial sealing lip disposed on the second radial edge;
• and
• a distal sealing lip disposed on the distal edge, wherein the first radial sealing lip, the second radial sealing lip, and the distal sealing lip define a sealing perimeter of the first surface adapted to engage a corresponding sealing surface of the housing of the air handling system in a first seal position;
• wherein a pivoting of the first surface about the axis from the first seal position causes a disengagement of at least one of the first radial sealing lip and the second radial sealing lip from the sealing surface in a location proximate the axis while the distal sealing lip remains engaged with the sealing surface at a location spaced from the axis.

A temperature door for an air handling system of a heating, ventilating, and air conditioning system for a vehicle, comprising:

• a first surface;
• a pivoting structure defining an axis, wherein the first surface is configured to pivot about the axis in a housing of the air handling system;
• the first surface further comprising:
• a first radial edge and a second radial edge extending radially outwardly from the axis, and a distal edge spaced from the axis and extending between the first radial edge and the second radial edge;
• a first radial sealing lip disposed on the first radial edge;
• a second radial sealing lip disposed on the second radial edge;
• and
• a distal sealing lip disposed on the distal edge, wherein the first radial sealing lip, the second radial sealing lip, and the distal sealing define a sealing perimeter of the first surface adapted to engage a corresponding sealing surface of the housing of the air handling system in a first seal position;
• wherein a first pivoting of the first surface about the axis from the first seal position to a second seal position causes formation of a first release gap between the first radial sealing lip and the sealing surface and a second release gap between the second radial sealing lip and the sealing surface while the distal sealing lip remains engaged with the sealing surface at the location spaced from the axis.