Flexible HVAC module with add-on multi-zone sub-assembly

摘要

An independent mixing valve sub-assembly ( 22 ) which includes a casing ( 50 ) defining a cold bias inlet ( 54 ), a hot bias inlet ( 56 ) and a second zone inlet ( 58 ) and a mechanism ( 52 ) for mechanically attaching the casing ( 50 ) to the housing ( 24 ) of a HVAC module with the cold bias inlet ( 54 ), the hot bias inlet ( 56 ) and the second zone inlet ( 58 ) of the mixing valve sub-assembly ( 22 ) in sealing engagement with a cold bias outlet ( 38 ), a hot bias outlet ( 40 ), and a second zone outlet ( 36 ) of a HVAC module, respectively. The mixing valve sub-assembly ( 22 ) may provide one or more streams of temperature-controlled air. Accordingly, different mixing valve sub-assemblies ( 22 ) may be attached to one universal HVAC module to provide varying numbers of temperature zones.