Abstract: A shut-off device including: a support frame having four sides, a first and second levers configured to be set in motion by an actuator, a first connecting part connected with the first lever, and a second connecting part connected with the second lever, a first set of flaps and a second set of flaps, fastened respectively to the first and second connecting parts. Each flap includes a flap lever arm connecting the flap to the respective first or second connecting part. The first lever includes a primary lever arm connecting the first lever to the first connecting part. The second lever includes a secondary lever arm connecting the second lever to the second connecting part. Each flap lever arm is shorter than any of the primary and secondary lever arms. The first lever and the second lever are connected to one another by a connecting rod.

Abstract: A command device (13) includes a sensor (15,16) for the measurement of a measured value VM of a characteristic C of a fluid FR,A and a comparison (14) of the measured value VM of the characteristic C of the fluid FR,A with at least two step-values VSmin, VSmax of the characteristic C. The command device (13) includes an upstream temperature sensor (20) to be positioned upstream the evaporator (12) according to the air flow direction (6) to measure an upstream temperature T2 of the air flow (3) and give an information (18) which is taken into account by the command device (13) in order to determine the step-values VSmin, VSmax of the characteristic C.

Abstract: The invention relates to a command device (13) of a fixed capacity compressor (9) associated with an evaporator through which an air flow passes in an air flow direction (6). The compressor (9) and the evaporator (12) are participating to an A/C loop (8) of an heating, ventilating and/or air conditioning device of a vehicle. The said command device (13) comprises a sensor (15,16) for the measurement of a measured value VM of a characteristic C of a fluid FR,A and comparison means (14) of the measured value VM of the characteristic C of the fluid FR,A with at least two step-values VSmin, VSmax of the characteristic C. The said command device (13) comprises an upstream temperature sensor (20) to be positioned upstream the evaporator (12) according to the air flow direction (6) to measure an upstream temperature T2 of the air flow (3) and give an information (18) which is taken into account by the said command device (13) in order to determine the said step-values VSmin, VSmax of the characteristic C.