VALVE HAVING AN EMERGENCY FUNCTION

摘要

The invention relates to a valve, particularly for controlling volume flows in the heating and/or cooling system (10) of a motor vehicle, comprising: a valve housing (58, 110, 156, 188) and a valve chamber (60, 118, 182), from which at least one inlet channel (112, 150, 180) and at least one outlet channel (116, 152, 184) branch; at least one valve element (66, 68, 120, 160, 162, 186, 187, 189) that interacts with at least one valve seat (69, 71, 115, 117, 163) of the valve chamber (60, 118, 182), and; a driven actuator (74, 124, 164, 190) for the at least one valve element (66, 68, 120, 122, 160, 162, 186, 187, 189). According to the invention, the valve has means (84, 86, 88, 90, 94, 96, 104, 138, 140, 144, 148, 138, 166, 174, 194, 196, 198, 212) for opening at least one outlet channel (116, 152, 184), which are independent from the actuator (74, 124, 164, 190). The invention also relates to a cooling and heating circuit (10) provided with at least one valve of the aforementioned type.