Patent ID: 8051906

Claim:
An integral heating and cooling assembly comprising: a first heat exchanger and a second heat exchanger sandwiched together in a parallel and abutting relationship to one another; said first heat exchanger including a first upper manifold and a first lower manifold spaced and parallel from said first upper manifold; said first heat exchanger including a plurality of first tubes parallel and spaced relative to one another and extending between said first manifolds; said second heat exchanger including a second upper manifold and a second lower manifold spaced and parallel from said second upper manifold; said second heat exchanger including a plurality of second tubes parallel and spaced relative to one another and extending between said second manifolds; an upper cross flow housing hydraulically connecting said first upper manifold with second upper manifold; a lower cross flow housing hydraulically connecting said first lower manifold with said second manifold; and a valve system having a first upper rotary valve disposed in said first upper manifold, a second upper rotary valve disposed in said second upper manifold, a first lower rotary valve disposed in said first lower manifold, and a second lower rotary valve disposed in said second lower manifold, wherein said valve system is configurable to provide (1) a maximum cooling mode in which fluid flows from said first upper manifold through both of said tubes to said first lower manifold, (2) a temperate mode in which fluid flows from said first upper manifold through said first tubes to said first lower manifold and from said second upper manifold through said second tubes to said second lower manifold, and (3) a maximum heating mode in which fluid flows from said second upper manifold through both of said first and second tubes to said second lower manifold; wherein each of said upper rotary valves defines a cross flow port for fluid flow between said upper manifolds through said upper cross flow housing; wherein each of said lower rotary valves defines a cross flow port for fluid flow between said lower manifolds through said lower cross flow housing; wherein each of said rotary valves defines a manifold port for fluid communication with said manifold in which said rotary valve is disposed and a tube port for fluid communication with said tubes associated with said manifold in which said rotary valve is disposed; and wherein each of said rotary valves includes a semi-circular valve element rotatable between three positions; (1) a cross flow position in which associated said manifold port is blocked and associated cross flow port is opened; (2) a blocking position in which associated manifold flow port is opened and associated cross flow port is blocked; and (3) an intermediate position in which associated said manifold port and associated said cross flow port are partially opened.