ROTARY REFRIGERANT VALVE FOR AUTOMOTIVE HEAT PUMP CONTROL

A rotary valve comprises: a valve body having a cylindrical cavity; a rotor having a cylindrical surface that abuts a surface of the cylindrical cavity, the rotor including: a center bore; a first channel extending between the center bore and a first opening in the cylindrical surface; a second channel extending between the center bore and a second opening in the cylindrical surface; a third channel extending between the center bore and a third opening in the cylindrical surface; and a fourth channel not connected to the center bore, the fourth channel extending between a fourth opening in the cylindrical surface and a fifth opening at an end surface of the rotor, the end surface adjacent the cylindrical surface; and ports extending through the valve body between the surface of the cylindrical cavity and an outside of the valve body.