Abstract: A refrigerant distribution module includes a first channel connecting a first inlet and a first outlet, a second channel connecting a second inlet and a second outlet, a third channel connecting a first connection area arranged on the first channel and a third outlet, a fourth channel connecting a third inlet and a second connection area arranged on the second channel, a fifth channel connecting a fourth inlet and a third connection area arranged on the second channel, and a sixth channel connecting a fourth connection area arranged on the fifth channel and a fifth connection area arranged on the first channel. The sixth channel includes a one-way valve. Each channel is formed by an internal recess of the same basic block.

Abstract: A connection module for a fluid, including: a body with a first opening and a second opening connected to each other by a channel so that the fluid can flow between the first opening and the second opening through the channel; a first valve placed inside the channel to control the flow of the fluid; a side passage configured to receive the first valve so that it can be placed within the channel. The channel has a first arm and a second arm arranged at an angle to the first arm. The connection module further includes a fixing element configured to be introduced through the side passage towards the first valve and immobilize the first valve.

Abstract: A centrifugal fan comprises a volute casing having an electric motor, controlled by a control module, coupled to an impeller mounted in the center of the volute, whereby to force air through the volute. In a predetermined zone of the volute, there is at least one deflecting wall or baffle, the curvature of which is substantially the same as that of this zone. The casing carries fastening means which are arranged to retain at least an element of the control module in a position in which this control module element is substantially integrated with the deflecting baffle. The air flowing in the volute can thus pass over the control module element, so as to cool the latter, without the air stream undergoing any significant perturbation.