PROPORTIONAL VALVE

摘要

The invention relates to a valve, more particularly a valve for controlling volume flows in heating and/or cooling systems (10) of a motor vehicle. Said valve comprises a housing (56, 120, 140) and a valve chamber (58, 129, 150), at least one inlet channel (84, 122, 144) and at least one outlet channel (86, 126, 144,) branching off from said chamber, in addition to at least one valve member (74, 130, 152) cooperating with at least one valve seat (91, 131, 158) of the valve chamber (58, 129, 150) and an actuator (64, 128, 154) driven by a control unit (38), which sets the at least one valve member (74, 130, 152) of the valve to a manipulated variable predetermined by the control unit. According to the invention, at least one volume flow passing through the valve (34, 36, 54, 119, 140) is proportional to the manipulated variable of the valve member (74, 130, 152). The invention also relates to a cooling and heating circuit (10) of a motor vehicle using at least one of said valves (34, 36, 54, 119, 140).