Abstract: Electronics rack door assemblies are provided to hingedly mount an air inlet or an air outlet side of an electronics rack, and be rotatable between closed and open positions. The door assembly includes a door frame, to hingedly mount to the electronics rack, with an opening to facilitate a flow of air through the electronics rack. The door assembly further includes an acoustical panel pivotably coupled to the door frame and aligned, at least in part, over the opening in the door frame. With the door frame hingedly mounted to the electronics rack at the air inlet or outlet side, the acoustical panel automatically pivots from an operation position relative to the door frame with the door frame in the closed position, to an at least partially collapsed position relative to the door frame with the door frame in the open position.

Abstract: Kits for cooling computing devices may include at least one heat-generating component and a fan. A first duct may be sized and shaped to surround the at least one heat-generating component on three sides to direct a portion of air flow from the fan. A second duct may be sized and shaped to extend over the first duct and direct another portion of air flow between the first and second ducts. The at least one heat-generating component may comprise multiple vertically and longitudinally aligned memory modules Computing devices, electronic systems and methods of cooling are also disclosed.

Abstract: A cooling system includes a chassis. A thermal sensor is located in the chassis. A plurality of fan zones are located in the chassis. Each of the plurality of fan zones includes at least one fan. A first mapping is provided between the thermal sensor and a first fan zone of the plurality of fans zone, and a second mapping is provided between the first fan zone and a second fan zone in the plurality of fan zones. A controller is coupled to the thermal sensor and the at least one fan in each of the plurality of fan zones. In response to receiving a signal from the thermal sensor, the controller is operable to activate the at least one fan in the first fan zone according to the first mapping and activate the at least one fan in the second fan zone according to the second mapping.

Abstract: A solid state drive apparatus includes a housing having an inner space and a plurality of vent channels penetrating a first side wall at a first side of the housing and a connector opening penetrating a second side wall at a second side of the housing opposite the first side of the housing, and a package substrate module in the inner space and having a package base substrate and a plurality of semiconductor chips mounted on the package base substrate. Each of the plurality of vent channels extends inwardly from an outer surface of the first side wall to an inner surface of the first side wall such that a vertical level of at least a portion of each of the plurality of vent channels varies between the outer surface and the inner surface.

Abstract: 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.

Abstract: A field serviceable apparatus includes a first and second display assembly hingedly mounted to a frame in a back to back arrangement. At least one of the display assemblies has a transparent layer, an electronic display, a first channel that receives circulating gas, and a second channel that receives ambient air. A cavity is located in the space between the rear surfaces of the display assemblies and the frame and contains a fixed plate for receiving electronic components. The cavity and the first channel are part of a closed loop pathway, while the second channel is part of an open loop pathway.

Abstract: A method and system for cooling air within an enclosure. The enclosure includes a cooling system and a remaining portion of the enclosure that is external to the cooling system. An outside air temperature of air entering the cooling system from outside the enclosure is monitored. A blowing air temperature of air in the cooling system at the outlet of the cooling system is monitored. A first inlet of the enclosure is controlled to be fully open or fully closed, in dependence on the monitored outside air temperature. A second inlet of the enclosure is controlled by adjusting an amount of opening of the second inlet, in dependence on the monitored blowing air temperature. A valve in a secondary water circuit of the cooling mechanism is controlled by adjusting an amount of opening of the valve, in dependence on the monitored outside air temperature.

Abstract: An enclosure for cryptocurrency mining rigs is used to reduce the noise pollution generated by the cryptocurrency mining rig. Additionally, the enclosure is designed to maintain the cryptocurrency mining rig within a desired thermal profile. To achieve this, the enclosure has a housing with a rig receptacle, a pair of ventilating lids an external vent and an access port. The ventilating lids are mounted over an opening of the rig receptacle and positioned offset from each other. This enables airflow into the rig receptacle while creating a circuitous path along which noise must travel when exiting the rig receptacle. Similarly, the external vent is a circuitous duct that extends through the housing. This enables air to flow into the housing without compromising the noise-reducing properties of the enclosure. The access port extends through the housing and enables the enclosure to be connected to external systems.

Abstract: This blower apparatus includes an air blowing portion including a plurality of flat plates arranged with an axial gap defined between adjacent ones of the flat plates; a motor portion arranged to rotate the air blowing portion; a clamper portion fixed to the motor portion; and a housing arranged to house the air blowing portion and the motor portion. The housing includes an air inlet and an air outlet. The air blowing portion is held by the motor portion and the clamper portion from upper and lower sides in the axial direction. Once the air blowing portion starts rotating, an air flow traveling radially outward is generated between the flat plates by viscous drag of surfaces of the flat plates and a centrifugal force.

Abstract: A power converter for a railroad vehicle includes a first fin and a second fin having outer shapes different from each other as viewed in an alignment direction. On both ends of the first fin and the second fin in a running direction, non-overlapping regions in which the first fin and the second fin do not face each other in the alignment direction are located so as to sandwich an overlapping region, in which the first fin and the second fin face each other in the alignment direction, therebetween.

Abstract: A mounting apparatus for an easily-demountable fan and cooling devices includes a fan housing for accommodating the fan and a locking unit rotatably installed to the fan housing. The locking unit is rotatable between a locking position and an unlocking position. The locking unit includes a locking portion. When the locking unit rotates to the locking position, the locking portion protrudes out of the fan housing for easy manual access, and when the locking unit rotates to the unlocking position, the locking portion is received in the fan housing.

Abstract: Systems, apparatuses, and methods for a module door having a biased latching mechanism providing safety measures to prevent accidental shock or short circuit. In an embodiment, a modular inverter system may include an empty module receptacle that includes a cavity configured to receive any modular power device. The cavity may be covered by a module door that features a rigid door member. The rigid door member may have a hinge set on one edge that is further attached to the enclosure for the module. The hinge allows for the module door to rotate open and closed. The module door further includes a latching mechanism that holds the module door in a closed position when latched. The module door also includes a disengagement orifice that is configured to receive a disengagement protrusion positioned in the back side of a power module about to inserted into the empty module receptacle.

Abstract: A control device for fan state includes fan connectors arranged on a substrate and connected with at least one fan. The substrate and the fan are arranged in a case of a computer. The substrate is provided with at least one communication port, at least one microphone and a microcontroller. The communication port receives temperature signals transmitted by the computer. The microphone receives volume signals within the case. A microcontroller is electrically connected with the fan connectors, the communication port and the microphone. After the microcontroller receives the temperature signal and the volume signal, the microcontroller uses them to determine whether a value of the temperature signal or the volume signal is larger than its given value. If the answer is yes, the microcontroller controls a rotational speed of the fan, turns off the fan, or provides control items displayed on a screen of the computer to choose.

Abstract: An inside of a housing of a power conversion device is partitioned by partitioning walls, and the power conversion device is configured from: an open part, into which external air flows; a first airtight part that is adjacent to the open part and into which no external air flows; and a second airtight part that is adjacent to the first airtight part and into which external air does not flow. At least two ventilation holes are formed in a partition wall between the first airtight part and the second airtight part. A circulation fan is provided to at least one of the at least two ventilation holes. The outer surface of the first airtight part is provided with a heatsink that dissipates heat transferred from an electronic component placed in the first airtight part, the heatsink being exposed to the open part.

Abstract: Temperature management systems for aerial vehicles may include heat pipes that are thermally connected to components that generate heat. The heat pipes may be routed through or adjacent to a propeller or propulsion airflow, or within or across a vehicle airflow, to dissipate heat from the components. A heat pipe may be selected from a plurality of heat pipes based on measured temperatures of components that generate heat, operational characteristics of the aerial vehicle and/or one or more propellers, and/or measured temperatures of other components that may be heated. Additional temperature management systems may include cool air ducts and cool air pipes that may be routed from a propeller or propulsion airflow, or a vehicle airflow, to components that generate heat or other components that may be cooled.

Abstract: A fan failure detection and reporting system organizes fans having similar characteristics into groups. The system establishes, for a given fan group, one or more reference characteristics and identifies, for each reference characteristic, a measure of tolerance. The system identifies as a problem fan a fan having a performance characteristic, obtained via monitoring, which exceeds a corresponding reference characteristic for the group to which the fan belongs by the measure of tolerance for the corresponding reference characteristic, and generates a notification that at least identifies the problem fan. In embodiments, the system is capable of determining the fan characteristics that are used for grouping and for identifying problem fans by monitoring the fans during operation thereof. Consequently, the system is capable of detecting problem fans even when the system initially has limited or no knowledge concerning the fans.

Abstract: An invention relates to a field of electrical engineering, in particular to various cabinet-type electronic devices of a general purpose with an equipment airflow cooling, conducted by virtue of a forced ventilation, and can be used in construction of various electrical devices, particularly of electric motor control stations. A claimed invention essence lies in a fact that the forced air cooling system of the power and low-current components of the electrical device contains an air heat exchanger, the power electronic components, as well as coolers, being in a thermal contact with the low-current electronic components, configured to be cooled with the single flow of previously cleaned extraneous air directed from a top of the enclosure to its bottom part. The coolers are spaced along a length of an air channel of the electronic device, forming a mixing zone of heated and cool air.

Abstract: According to some examples, solutions are provided for setting a cooling system of a computer system chassis by a positionable cover disposed on a computer hardware component receivable by the computer system chassis.

Abstract: A mobile terminal includes a front case accommodating a display on a front surface and having a receiver for outputting a sound, a rear case coupled to one side of the front case, a rear cover covering a rear portion of the rear case to form an appearance and having an air vent hole allowing air to flow in and out to maintain predetermined pressure, and a circuit board installed been the front case and the rear case, wherein an air flow port is formed on an inner side surface of the rear cover and protrudes from the rear cover toward the rear portion of the case to guide movement of air formed by an external force acting on the rear cover.

Abstract: Disclosed is a computing server that is housed in a cabinet assembly. The computing server includes at least a power supply module, a first processing module, a second processing module, a motherboard module, a communication module, and a fan module. The computing server is the next-generation residential mini-supercomputers connected to other ServerCube (SC) Devices around the world forming the SC P2P swarm network. Set-up is simple, for example, plug and-play into any standard (1200-Watt) household outlet, requiring only a basic consumer broadband connection to connect to the internet. The SC Device offers commercial strength hash rate processing power (162 MH/s for ETH up to a maximum 225 MH/s), running over a basic 3 (three) Mbps connection. The SC device is also designed to be more energy efficient and uses 95% (ninety five percent) of its cubic space.

Abstract: According to one embodiment, an ultrasonic diagnostic apparatus includes an imaging system, a biological signal receiving system and a biological signal acquisition apparatus. The imaging system is configured to acquire ultrasonic image data by transmitting and receiving an ultrasonic wave to and from an object. The biological signal receiving system is configured to wirelessly transmit a transmission request of a biological signal of the object, receive the biological signal of the object wirelessly transmitted as a response to the transmission request, and output the received biological signal to an output unit. The transmission request is transmitted to a biological signal acquisition apparatus. The biological signal acquisition apparatus control system is configured to wirelessly transmit information according to an operating condition of at least one of the imaging system and the biological signal receiving system. The information is transmitted to the biological signal acquisition apparatus.

Abstract: A cooling system is configured to directly cool electronic devices of different types immersed in a coolant filled in a cooling apparatus having a cooling tank with an open space defined by a bottom wall and side walls, arranged housing parts formed by dividing the open space using internal partition walls in the cooling tank, an inflow opening formed in a bottom part or a side surface of each of the housing parts, and an outflow opening formed around a surface of the coolant circulating in the respective housing parts. Electronic devices of different types include first electronic devices configured to execute arithmetic operations through processors, and second electronic devices configured to execute storage through storage units. The arbitrary numbers of the first and second electronic devices are separately housed in the housing parts of the cooling apparatus to form a computer with a calculation capacity and a storage capacity.

Abstract: An EMI shielded vent panel for disposition over a corresponding opening in an electronics enclosure includes an electrically conductive medium having a plurality of ventilation passageways, each passageway including an entry and a channel connected to and extending away from the entry; wherein each passageway is selectively actuated between at least a first constricted state and a second deconstricted state upon application of or removal of an activation mechanism.

Abstract: The present invention is a modular, energy efficient structure for housing racks of computers specifically designed for mining Bitcoin assets. The fundamental principal towards an optimized mining facility design is to decrease electricity consumption as well as effective construction budget management, ensuring only appropriate business expenditures. The side benefits including improved stability of the facility computer network and electricity supply. The design concept is carried out through a cool/hot air segregation process, which results in controllable internal facilities temperatures, dust filtration and energy savings.

Abstract: Disclosed is a system for facilitating homogenized distribution of airflow, generated from one or more cooling units, in a data center. The virtual data center creation module for creating a virtual environment of the data center. The airflow channel determination module for dividing the architectural layout into one or more partitions to determine one or more airflow channels corresponding to each of the one or more partitions. The CRAC placement module for positioning the at least one cooling unit in an airflow channel, of the one or more airflow channels, in a manner such that the airflow moves in a streamline manner within the airflow channel. The vein determination module for determining position of each of a plurality of veins inside the airflow channel. The vein shape determination module for determining shape of each vein that facilitates the homogenized distribution of the airflow.

Abstract: The presently disclosed embodiments are directed to an improved mechanical arrangement of a drawout power module system that prevents outside contaminants from being deposited on the electronic components in the power module. A need exists for an improved mechanical arrangement of a power module and cabinet that would prevent the contaminants from outside of the cabinet from being deposited on the electronic components in the power module. To that end, the outdoor drive may include a cabinet with an air intake and an air outlet located on said cabinet and in fluid communication with an interior space of said cabinet, wherein said cabinet is configured to receive a power module within said interior space. The power module may include an environmentally sealable chamber where outside air can enter and exit only said environmentally sealable chamber of said power module.

Abstract: An air circulation and ventilation system for an enclosure. The system includes a fan assembly subsystem with a housing defining a manifold. The housing has a first intake aperture configured to receive air from within the enclosure, a first outlet aperture configured to emit air from the manifold to outside the enclosure, and a fan configured to draw air in through the first intake aperture. The system includes a pressure equalization subsystem having a port configured to allow additional air into the enclosure. The port includes a damper for selectively opening and closing the port. The system also includes a switching subsystem with a switch operably coupled to the fan and the damper. The switch selects between a first mode where the damper is closed and the fan is off and a second mode where the port damper is open and the fan is on.

Abstract: An apparatus for monitoring and maintaining thermal exhaust temperatures for monitored servers may include a processor in communication with an exhaust temperature control system. The processor may implement various control loops to monitor inlet and exhaust temperatures for one or more servers, and the processor may monitor temperatures of various hardware components within those one or more servers. When the processor determines that a hardware component for a given server is overheating, the processor may take steps to decrease the temperature of the overheating hardware component for the given server. To determine whether a hardware component is overheating, the processor may leverage the hardware component's operating temperature margin.

Abstract: The present invention provides a detachable assembly device. The detachable assembly device is configured to electrically connect electronic device with main circuit board. The detachable assembly device comprises carrier, support frame, handle and linkage assembly. The carrier is configured to fix main circuit board. The support frame is configured to fix electronic device. The support frame is movably disposed on side of carrier and comprises a cover plate and a second side plate that are connected to each other. A portion of handle is pivotally connected to portion of cover plate. Two portions of linkage assembly are respectively pivotally connected to another portion of handle and to another portion of cover plate. When support frame is located in a locked position that is relatively close to carrier, handle and first side plate are engaged with each other, and electronic device is electrically connected with main circuit board.

Abstract: A fan frame body with bypass structure and a fan thereof. The fan includes a first fan, a second fan and a bypass structure. The second fan has a second frame body correspondingly serially connected with a first frame body of the first fan, whereby a first flow way of the first frame body communicates with a second flow way of the second frame body. The bypass structure is disposed in the first flow way or the second flow way. The bypass structure defines a bypass flow way on a circumference of the first flow way or the second flow way. By means of the bypass structure, without increasing the size of the fan and without increasing the consumed power of the fan, the air volume of the fan can be enhanced.

Abstract: Systems and methods for integrated thermal management of storage drives are described. In one embodiment, the storage system device may include a storage enclosure, a plurality of storage drives enclosed in the storage enclosure, and one or more processors in each of the plurality of storage drives. In some cases, the plurality of storage drives may include a first storage drive and a second storage drive. In some embodiments, the one or more processors of the first storage drive may be configured to activate a drive temperature monitor of the first storage drive in response to a manufacturer specific command, detect a temperature event of the first storage drive, and send a notification to the storage enclosure upon detecting the temperature event, the notification indicating the temperature event.

Abstract: In accordance with embodiments of the present disclosure, a system may include a cooling subsystem for cooling components of an information handling system and a thermal manager communicatively coupled to the cooling subsystem. The thermal manager may be configured to receive information regarding a reference performance metric for the cooling subsystem, based on the reference performance metric, modify at least one thermal control parameter for thermally controlling the information handling system from a baseline setting associated with a hardware configuration of the information handling system, and thermally control the information handling system in accordance with the at least one thermal control parameter as modified.

Abstract: A system for storing data includes a discrete cooling module that can enable discrete cooling of mass storage devices installed in the chassis interior of a data storage module coupled to a rack. The discrete cooling module includes an air moving device and an air cover. The air moving device can induce and airflow through the chassis interior of the data storage module to remove heat from heat producing components of mass storage devices installed in the chassis interior. The air cover directs the airflow through the chassis interior. The discrete cooling module can isolate rotational vibrations generated by the air moving device from the mass storage devices installed in the chassis. Partial isolation can include indirectly coupling the discrete cooling module to the chassis via directly coupling with the rack.

Abstract: A method for providing over-heating protection of a target device within an information processing system is disclosed. A determination is made whether or not a power status of the information processing system is set to turn on a main power of a power supply device. If the power status of the information processing system is set to turn on a main power of a power supply device, a power switch of the target device is turned on; otherwise, another determining is made whether or not the target device is set to operate based on a user's setting. If the target device is set to operate based on the user's setting, the power switch of the target device is turned on; otherwise, the power switch of the target device is turned off.

Abstract: Embodiments of the invention are directed to methods and systems for backflow prevention for computing devices. In an embodiment, a system of sensors, processors, and airflow stimulation devices, such as fans, are used to prevent backflow of high temperature gasses through a server housing. The backflow of high temperature gasses may be a result of a pressure differential between a region in which cooling gases are disposed and a region in which high temperature exhaust gasses are disposed.

Abstract: Provided is a structure configured to stably supply electric power to functional units forming an image forming apparatus. To achieve this, the image forming apparatus includes: an image creating portion (307Y) serving as a functional unit for forming images; and an apparatus main body including a DC power distribution portion (206) configured to supply electric power to the image creating portion (307Y) and a main controller (219) configured to control operation of the image creating portion (307Y). The image creating portion (307Y) includes a protection circuit (220) and a load to be driven by electric power that is supplied from the DC power distribution portion (206). The protection circuit (220) gradually supplies power source electric power to the load when mounted on the apparatus main body, and immediately shuts off the supply of the electric power to the load when pulled out of the apparatus main body.

Abstract: An air handling unit for a data center, a data center comprising such a unit, a method of operating such a unit and a method of cooling IT equipment in a data center using such a unit is disclosed. An indirect air handling unit (IDAHU) (101) for a data center comprises an external air flow path (102) arranged to be in fluid communication with air outside the data center; an internal air flow path (103) arranged to be in fluid communication with air inside the data center, wherein the external air flow path (102) is separated from the internal air flow path (103); and a plurality of heat tube panels (106).

Abstract: Technology is provided for a device sled with a fan cartridge. The device sled includes a sled chassis having a bottom wall and first and second opposed sidewalls. A pair of spaced apart channels are each coupled to the bottom wall and include an associated latch aperture. A fan cartridge is removably inserted between the pair of spaced apart channels. The fan cartridge includes a cartridge frame and one or more fans coupled to the cartridge frame. One or more latches are positioned on the cartridge frame to engage a corresponding latch aperture when the fan cartridge is inserted between the pair of spaced apart channels.

Abstract: A power supply includes a bottom case, a top cover, a circuit board and a heat-dissipating fan. In this case, the bottom case and the top cover are fitted together to delimit an accommodating space. The circuit board is mounted on the bottom case and located within the accommodating space. The heat-dissipating fan includes a supporting frame, a driving module provided on the supporting frame, and a fan blade set covering the driving module and being driven by the driving module to rotate. The supporting frame is provided with a main body for the driving module and the fan blade set to be installed, as well as a plurality of supporting posts respectively connected to the main body and fixed on the circuit board, and the heat-dissipating fan is not provided with a barrier wall around the fan blade set.

Abstract: A cooling assembly for an electronic display includes a front channel that passes in front of the viewable area of the electronic display. A center channel is located behind the electronic display. A rear channel is located behind the second channel. A first plurality of subchannels are located within the center channel and connect only to the front channel. A second plurality of subchannels are located within the center channel and connect only to the rear channel.

Abstract: An air-cooling heat dissipation device includes a base, a swirling-airflow heatsink, an air pump and a passage connector. The base is located beside an electronic component while the air pump is fixed on the base. The swirling-airflow heatsink is attached on the electronic component and includes a swirling passage defined by a conductive line and a thermal conduction plate collaboratively. An airflow-guiding chamber is defined by the air pump and the base collaboratively, and the airflow-guiding chamber is in communication with the swirling passage by the passage connector. When the air pump is enabled, an ambient air is introduced into the airflow-guiding chamber of the base and transferred to the swirling passage of the swirling-airflow heatsink through a discharge opening of the base and the passage connector. Consequently, a fast swirling air flow is produced to cool the electronic component.

Abstract: A cold-air bypass apparatus may include (1) a mount configured to couple the cold-air bypass apparatus to a drive-plane board housed within a storage-system chassis and (2) a baffle configured to direct a portion of an airflow through an opening in the drive-plane board from below the drive-plane board to above the drive-plane board. The drive-plane board may include (1) a front drive section that includes storage-drive connectors coupled to the drive-plane board, (2) a rear drive section that includes additional storage-drive connectors coupled to the drive-plane board, and (3) the opening located between the front drive section and the rear drive section that allows air to flow from below the drive-plane board to above the drive-plane board. Various other apparatus, systems, and methods for directing air in a storage-system chassis are also disclosed.

Abstract: An apparatus includes a fan having a fan housing with guidance members extending from opposing sides of the housing, wherein the fan housing has a depth that is less than a height and width. A handle is pivotably coupled to the fan housing, and guidance tracks are positioned on opposing sides of an open channel. Each of the guidance tracks has a first track portion extending from a first face of a chassis in a first direction into the chassis and a second track portion extending from the first track portion in a second direction. The guidance members move along the corresponding guidance tracks, wherein the fan housing moves along the first track portion in a sideways orientation and reaches an operating orientation in the second track portion.

Abstract: A computer system includes a chassis, one or more hard disk drives coupled to the chassis, and one or more air passages under at least one of the hard disk drives. The air passages include one or more air inlets and one or more air outlets. The inlets direct at least a portion of the air downwardly into the passages. The passages allow air to move from the air inlets to the air outlets.

Abstract: A data center system includes a multi-floor housing having a first floor and a second floor housings which house a number of electronic racks of information technology (IT) components operating therein. The system includes a first set of indirect evaporative cooling units (IDECs) coupled to a first portion of the multi-floor housing through a first side of the multi-floor housing to direct exterior air through heat exchangers of corresponding IDECs to cool a first portion of interior air which cools a first set of the electronic racks. The system includes a second set of IDECs coupled to a second portion of the multi-floor housing through a second side of the multi-floor housing to direct exterior air through heat exchangers of corresponding IDECs to cool a second portion of interior air which cools a second set of the electronic racks. The system includes various DEC couplings/layouts and air flow management.

Abstract: A cooling canister includes a canister body with an opening in the canister body that is configured to couple with a corresponding opening in a canister body of an adjacent cooling canister in a rack. Servers are coupled with the cooling canister and a set of fans are coupled with the cooling canister. The cooling canister provides at least partial airflow isolation between an airflow through the set of servers coupled with the cooling canister and other airflows through other servers in the rack. In the event of a control anomaly, such as a fan failure, the opening in the canister body of the cooling canister is configured to permit airflow between the cooling canister and an adjacent cooling canister to supplement an airflow through the cooling canister. In some embodiments, a dampers is included in the opening in the canister body of the cooling canister.

Abstract: A fan assembly includes a fan having an outlet side, a fan duct positioned at the fan outlet side, and a hollow cylindrical chamber positioned within the fan duct, wherein the chamber has two closed ends, a cylindrical side wall, and an inlet port. The dimensions of the chamber are determined to suppress one or more noise frequencies emitted by the fan. In one example, one or more dimensions of a chamber disposed in an outlet duct of an axial fan is automatically adjusted to suppress a noise frequency that is a function of a rotational speed of the axial fan.

Abstract: A fan guard and method of use thereof. The fan guard includes a first lattice, the first lattice comprising a first lattice protrusion, a second lattice, the second lattice comprising a second lattice protrusion and an inclined portion, a catch, a tensioning element, a first end of the tensioning element operably attached to the first lattice protrusion, a second end of the tensioning element operably attached to the second lattice protrusion, the tensioning element applying a rotational force to the second lattice in a first direction, a bezel, the bezel including a bezel extension that extends substantially perpendicularly from a face of the bezel, wherein the bezel extension is configured to rotate the catch and an inclined plane extending from the face of the bezel.

Abstract: An anti-backflow device for a fan unit, which is fabricated by cutting a rectangle thin plate, includes: a plate body defining an air outlet to permit air outflow upon activation of the fan unit, and having at least two inner peripheral sides; a plurality of connection arms; and a plurality of blades. Each blade is connected a pair of the connection arms, which are in turn connected to two connecting holes formed in the inner peripheral sides of the plate body.

Abstract: An electronic apparatus includes: a fan which flows cooling air in a flow passage; a plurality of modules which are arranged in the flow passage, the modules including first and second modules, the first and second modules being aligned with a flow direction of the cooling air; and a support member that supports the first module, and makes a portion of the first module protrude further than the second module in a direction approximately orthogonal to the flow direction.