Examples herein relate to cooling systems. In one example, a cooling system comprises a plurality of adjacent fan modules configured to generate a plurality of cooling flows, a fan cage having a central axis adapted to contain the plurality of adjacent fan modules, the fan cage comprising a cavity on its central axis. Furthermore, the system comprises a first support bracket adapted to support the fan cage such that the fan cage rotates on its central axis and a bush established in the cavity of the fan cage. A first end of the bush is adapted to engage the first support bracket on a first surface of the fan cage.

In one embodiment, an apparatus includes a fan for cooling electronics within a chassis, the fan comprising a rotor with a plurality of fan blades connected thereto for generating an axial airflow during operation of the fan, a sensor for detecting failure of the fan, and an airflow blocking device positioned at an exhaust side of the fan and configured to prevent airflow through the fan upon detection of the fan failure, wherein the airflow blocking device is stowed in a position removed from a path of the axial airflow generated by the fan during operation of the fan. A method for preventing airflow recirculation at a failed fan is also disclosed herein.

A network device includes a shelf configured to support interface cards on a front side; a control module including a first frame and a printed circuit board disposed to the first frame, wherein the control module is configured to connect on a rear side of the shelf; and a cooling module including a second frame and cooling fans disposed to the second frame, wherein the second frame is configured slidingly connect to the first frame on the rear side of the shelf.

A fan assembly includes a socket to receive a fan module, a fan flap coupled to a first side wall of the socket, and an anti-reflow device coupled to a second side wall of the socket. The fan flap moves in a curved path between a first position and a second position. The anti-reflow device has an attachment feature, an embossed feature, and a stopping feature. The attachment feature attaches the anti-reflow device to the second side wall. The embossed feature extends through a first aperture in the second side wall. The stopping feature extends through a second aperture in the second side wall and contacts the fan flap. When the fan module is removed, the stopping feature retains the fan flap in the first position to block the socket and prevent air from reflowing through the socket.

Systems and methods for a hybrid control and cooling module with an independently removable cooling section for a network device. A control module for a network device includes a frame. A printed circuit board is disposed on the frame. Connectors are configured to operably connect the printed circuit board to mid-plane connectors of a shelf of a network device. A control module mounting system is disposed on the frame and is configured to slidably mount the control module to a shelf of a network device. A cooling module guidance system is disposed on the frame and is configured to slidably mount thereon a cooling module for a network device.

Systems and methods for a hybrid control and cooling module with an independently removable cooling section for a network device. A control module for a network device includes a frame. A printed circuit board is disposed on the frame. Connectors are configured to operably connect the printed circuit board to mid-plane connectors of a shelf of a network device. A control module mounting system is disposed on the frame and is configured to slidably mount the control module to a shelf of a network device. A cooling module guidance system is disposed on the frame and is configured to slidably mount thereon a cooling module for a network device.

A motor drive device capable of attaching a fan unit to a mounting member more easily. The motor drive device includes the mounting member formed with a mounting hole, the fan unit including a lid positioned facing the mounting member to cover the mounting hole and being fixed to the mounting member, and a restricting member movably attached to the lid, the restricting member being movable between a restriction position for engaging with the mounting member and a non-restriction position for releasing from the mounting member.

A cooling device includes a fan; an intake-side intrusion-preventing member that is provided on an intake side of the fan and prevents an object from entering the fan; an exhaust-side intrusion-preventing member that is provided on an exhaust side of the fan and prevents an object from entering the fan. The intake-side intrusion-preventing member and the exhaust-side intrusion-preventing member have different shapes.

In one embodiment, an apparatus includes a fan for cooling electronics within a chassis, the fan comprising a rotor with a plurality of fan blades connected thereto for generating an axial airflow during operation of the fan, a sensor for detecting failure of the fan, and an airflow blocking device positioned at an exhaust side of the fan and configured to prevent airflow through the fan upon detection of the fan failure, wherein the airflow blocking device is stowed in a position removed from a path of the axial airflow generated by the fan during operation of the fan. A method for preventing airflow recirculation at a failed fan is also disclosed herein.

Methods, systems, and apparatus, including a housing defining a top surface, a bottom surface, and first and second side surfaces. Also included is a first rail extending from the first side surface and a second rail extending from the second surface such that when the first and second rails are slidably engaged with a third surface. A blower device is included that is axially disposed between the top and bottom surface, wherein a first end of the housing defines a first plenum outlet, the top surface defines a plenum inlet, the bottom surface defines a second plenum outlet that is positioned on a second side of the blower device and that fluidly couples the first plenum chamber to the second plenum chamber. Further, the second plenum chamber is formed by the first and second rails, the bottom surface and the third surface has a third plenum outlet.