Condenser Fan Orifice Rings

A heating, ventilation, and air conditioning system comprising:

• a closed conduit circuit for moving a refrigerant;
• a compressor fluidly coupled to the closed conduit circuit;
• a condenser fluidly coupled to the closed conduit circuit;
• an expansion valve fluidly coupled to the closed conduit circuit;
• an evaporator fluidly coupled to the closed conduit circuit;
• and
• a compressor-condenser unit comprising the compressor and the condenser, the compressor-condenser unit further comprising:
• a cabinet having a plurality of walls including a top panel,
• a fan motor coupled to the cabinet,
• one or more fan blades coupled to the fan motor,
• an orifice opening formed in the top panel,
• a condenser orifice ring disposed within the orifice opening, wherein the condenser orifice ring is sized to receive the one or more fan blades, and
• the condenser orifice ring comprising:
• an annular member having a height extending between an upstream edge and a downstream edge,
• the annular member comprising a wall having an interior surface and an exterior surface, wherein the wall flares outward at the upstream edge and flares outward at the downstream edge,
• wherein the flare of the wall at the upstream edge is between 5 and 20 degrees from a vertical, and
• wherein the flare of the wall at the downstream edge is between 15 and 30 degrees from the vertical.

A compressor-condenser orifice ring for use with an HVAC system, the compressor-condenser orifice ring comprising:

• a substantially circular member having a wall with a height H, which is a vertical dimension when in an installed position, and having an upstream edge and a downstream edge;
• an inner portion of the substantially circular member forming an area to accommodate one or more fan blades and to provide fluid passage;
• and
• wherein the wall has an entry portion, a middle portion, and an exit portion, and wherein the entry portion has an entry inside diameter Den, the middle portion has a middle diameter Dm, and the exit portion has an exit inside diameter Dex, and wherein Den >Dm by at least five percent and Dex>Dm by at least five percent.