Abstract: According to one embodiment, an electronic apparatus includes a printed circuit board, a heat pipe, a fan unit and a fixing unit. The heat pipe has a first end physically fixed to and thermally connected to a first circuit component, and a second end opposite to the first end. The fan unit is provided in the vicinity of the second end of the heat pipe, and cools the second end. The fixing unit fixes the position of the heat pipe at a position different from the position of the first circuit component.

Abstract: A chip package includes a processor, an interposer chip and a voltage regulator module (VRM). The interposer chip is electrically coupled to the processor by first electrical connectors proximate to a surface of the interposer chip. Moreover, the interposer chip includes second electrical connectors proximate to another surface of the interposer chip, which are electrically coupled to the first electrical connectors by through-substrate vias (TSVs) in the interposer chip. Note that the second electrical connectors can electrically couple the interposer chip to a circuit board. Furthermore, the VRM is electrically coupled to the processor by the interposer chip, and is proximate to the processor in the chip package, thereby reducing voltage droop. For example, the VRM may be electrically coupled to the surface of the interposer chip, and may be adjacent to the processor. Alternatively, the VRM may be electrically coupled to the other surface of the interposer chip.

Abstract: A datacenter may use heat collected from a heat exchanger at the exhaust portion of a cooling system to heat inlet louvers for an atmospheric intake. The louvers may have fluid passages through which heated fluid may pass and cause the louvers to heat up. The heated louvers may operate during periods of snow, rain, high humidity, or other conditions to eliminate condensation, snow and ice buildup, or other problems. In some embodiments, a liquid may be passed through the louvers, while in other embodiments, heated air or other gas may be passed through conductive paths in the louvers. In a heated air system, holes in the louvers may allow the heated air to enter the incoming airstream to regulate the incoming temperature to the datacenter.

Abstract: A system for use with a computing rack that prolongs operation of computing devices mounted within the rack by preventing or at least limiting the circulation of airflow (e.g., hot airflow) through empty receiving bays of the rack upon removal of computing devices from the receiving bays. In one arrangement, the system includes a plurality of airflow restriction devices (e.g., baffle plates) movably secured adjacent respective receiving bays of the cabinet. Each airflow restriction device is automatically movable between a deployed position to restrict airflow through respective receiving bay in the absence of a computing device in the receiving bay and a refracted position to allow for mounting of a computing device in the receiving bay (e.g., so that the computing device can exhaust hot air out of the rear portion of the receiving bay).

Abstract: The disclosure discloses a rapidly assembling/disassembling device including a fixing frame, partitions, pushing brackets, and a fastening member. The fixing frame includes a first side plate and a second side plate. Fan modules are sequentially arranged between the first and second side plates. The second side plate abuts against a second side of the adjacent fan module. Each of the partitions abuts against the second side of the corresponding fan module. Each of the pushing brackets is pivotally connected in the fixing frame. Each of the pushing brackets includes a pushing arm. The fastening member is disposed on the first side plate. When the fastening member pushes the adjacent pushing bracket to abut against a first side of the adjacent fan module, each of the other pushing brackets is pushed by the corresponding pushing arm to abut against the first side of the corresponding fan module.

Abstract: An enclosure is presented. The enclosure includes an outer casing having one or more walls. Further, the enclosure includes a synthetic jet assembly configured to dissipate heat from the one or more walls, where the synthetic jet assembly includes a bracket operatively coupled to the one or more walls of the outer casing and two or more synthetic jets operatively coupled to the bracket, where the two or more synthetic jets are arranged in a multi-dimensional array.

Abstract: A vertical exhaust duct for an electronic equipment enclosure is provided. The vertical exhaust duct includes a first duct section, a second duct section slidably connected to the first duct section and extendable to a first height above the first duct section, and a third duct section slidably connected to the second duct section and extendable to a second height above the second duct section.

Abstract: In an embodiment, a medium voltage drive system includes a transformer, multiple power cubes each coupled to the transformer, and a manifold assembly. Each power cube includes cold plates each coupled to a corresponding switching device of the cube, an inlet port in communication with a first one of the cold plates and an outlet port in communication with a last one of the cold plates. The manifold assembly can support an inlet conduit and an outlet conduit and further support first and second connection members to enable blind mating of each of the first connection members to the inlet port of one of the power cubes and each of the second connection members to the outlet port of one of the power cubes to enable two phase cooling of the plurality of power cubes.

Abstract: Provided is an outdoor display apparatus having an improved configuration to effectively prevent deterioration of a panel included therein. The outdoor display apparatus includes: a casing body having an air inlet and an air outlet; first and second display panel modules in the casing body to display images on front and rear surfaces of the casing body, respectively; transparent members fitted respectively to the front surface and the rear surface of the casing body to protect the first and second display panel modules; an air suction unit to suction the air into the casing body through the inlet and to discharge the air through the outlet; and an air distribution unit to distribute the air discharged from the air suction unit to at least one of the first display panel module and the second display panel module.

Abstract: An electronic device including a first body, a rotating base and a transmission module is provided. The rotating base has a first ventilation opening. The rotating base is pivoted on the first body and suitable for rotating between a using position and a retracted position in relative to the first body. When the rotating base is located at the retracted position, the first ventilation opening is exposed from the first body. When the rotating base is located at the using position, the first ventilation opening is retracted in the first body. The transmission module is connected to the rotating base for outputting a mechanical force to actuate the rotating base.

Abstract: Attenuation systems have cooling components that produce power in response to heat generated by the attenuator. The cooling components can be used to power cooling fans if a primary power source of the fans fails.

Abstract: A cooling fan system includes at least one fan unit including a cooling fan and a controller for controlling the cooling fan, a management unit including a fan control section that controls the controller of the fan unit, and a circuit directly connecting the management unit to the cooling fan so as to allow the cooling fan to be controlled directly by the fan control section. The fan control section includes a malfunction detecting section to detect malfunction of the fan unit and a forced control section that directly controls the cooling fan and carries out a forced control to forcibly rotate the cooling fan at a higher rotational speed than that during normal operation when the malfunction detecting section detects the malfunction of the fan unit.

Abstract: According to one embodiment, an electronic apparatus includes a first housing and a second housing. The first housing includes a first wall, a second wall opposite to the first wall, and a third wall between the first wall and the second wall. The third wall faces the second housing when the second housing is raised from the first housing. The third wall includes an outmost portion of the third wall in a direction from a fan toward the third wall, a first area obliquely extending between the outmost portion and the first wall and including a first opening, and the second area obliquely extending between the outmost portion and the second wall and including a second opening.

Abstract: Provided herein are a display device and a cooling apparatus, the cooling apparatus including an impeller which sucks a fluid in an axial direction, and which discharges the fluid in a radial direction; a pair of radiation blocks, which are respectively disposed at each side of the impeller, wherein each of the radiation blocks includes a plurality of radiation fins; and a plurality of scroll units which guide the fluid discharged from the impeller to the pair of radiation blocks, wherein each of the scroll units includes a first scroll part which guides the fluid based on a rotating direction of the impeller, and a second scroll part which guides the fluid so in a direction opposite to the rotating direction of the impeller.

Abstract: A supporting apparatus, configured to support a heat dissipating device, includes a bracket, two adjusting structures, and two mounting portions. Each of the two mounting portions defines a mounting hole. Each of the two adjusting structures is engaged in each of the mounting holes and includes an adjusting member and an installation member engaged with the adjusting member. Each of the adjusting members defines a through hole. The two adjusting members are rotatable relative to the two mounting portions from a first position to a second position. When the adjusting members are in the first position, a first line is running through the two through holes. When the adjusting members are in the second position, a second line is running through the two through holes, and a length of the first line is less than a length of the second line.

Abstract: Described embodiments include a portable electronic device. The device includes a shell housing components of the portable electronic device having a heat-generating component. The device includes a heat-rejection element located at an exterior surface of the shell. The heat-rejection element is configured to reject heat received from the heat-generating component into an environment in thermal contact with the heat-rejection element. The device includes a controllable thermal coupler configured to regulate heat transfer to the heat-rejection element. The device includes an activity monitor configured to infer a user touch to the shell in response to a detected activity of the portable electronic device. The device includes a thermal manager configured to regulate heat transfer by the controllable thermal coupler to the heat-rejection element in response to the inferred user touch.

Abstract: An air guiding structure includes a shaft that is provided on a substrate body in an upright manner; a baffle plate coupled to the shaft so as to rotate around the shaft, the baffle plate guiding air that has been introduced into the substrate body; and a rotation restricting member that restricts a rotation of the baffle plate caused by the air that has been introduced.

Abstract: Preferred embodiments provide a cooling system for an electronic display. A constricted convection plate is used to force cooling air against a posterior surface of the electronic display. Fans may be used to propel or pull air between the constricted convection plate and the rear surface of an electronic display. A refrigeration unit or thermoelectric module may be employed to cool or heat the air traveling through the constricted convection channel. Some embodiments include a closed loop which extracts heat (or adds heat) to the front display surface.

Abstract: A server system includes a rack, a server disposed in the rack, an electronic device and a power supply disposed in the rack. The rack includes a first side and a second side opposite to each other, two first brackets, two second brackets and two lateral rails. Each first brackets, disposed at the first side, includes a heat-dissipation part. Each heat-dissipation part includes at least one ventilating perforation. The second brackets are disposed at the second side. The electronic device is disposed between the lateral rails and at the first side. The power supply is disposed between the two lateral rails and at the second side and includes a main body and at least one fan. The main body includes a plurality of through openings facing the ventilating perforations. The at least one fan draws airstreams from the ventilating perforations via the through openings.

Abstract: Some embodiment includes an air conditioner, an air blower, a sensor, and a controller. The air conditioner works for supply to cold spaces. The air blower produces streams of air in and between a server room and an air conditioning system. The sensor takes a measure of current or power as consumption at servers. The controller operates on the measure at the sensor, to control the air blower.

Abstract: An apparatus is provided in one example embodiment and includes a faceplate having a plurality of slots arranged on a front portion of the faceplate, a top plate attached to a top portion of the faceplate, and a screen attached to the faceplate and the top plate. A channel may be disposed behind the faceplate and between a bottom surface of the top portion of the faceplate, a bottom surface of the top plate and a top surface of the screen. The screen may include a plurality of openings. In a specific embodiment, the apparatus may be removably attached to a removable line card of a switch. In a specific embodiment, air may be guided through the slots, by a fan operating behind the apparatus, along the channel and through the plurality of openings to one or more heat generating components on the line card.

Abstract: A power converter arrangement has two static switching element bridges that are alternatively operable and comprise static switching elements. The power converter arrangement has one housing that houses the two static switching element bridges; the housing has one cooling system for the static switching element bridges housed therein.

Abstract: Cooling airflow through an information handling system is redirected at positions of a motherboard having an unpopulated processing component towards positions of the motherboard having processing components. For example, a shroud shaped as a nozzle couples to a heat sink connector of the motherboard to cover an unpopulated CPU socket. The shroud has a nozzle-shaped channel with an inlet accepting cooling airflow and an outlet exhausting the cooling airflow towards a processing component. For instance, the inlet is proximate a cooling fan and the outlet directs the airflow from the cooling fan towards a heat sink associated with RAM populated on the motherboard.

Abstract: An electronic device includes a chassis, a power supply, and an air duct. The chassis includes a top plate, two side plates, a front plate set in a front of the top plate, and a baffle set at an inside of the front plate. The front plate, the baffle, the top plate and the side plates together define a receiving cavity for receiving the power supply. The front plate includes an air inlet adjacent to one end of the power supply. A fan is set at another end of the power supply. The side plate defines an opening. The air duct set on an outside of the side plate with the opening. An air channel is formed between the air duct and the side plate with the opening. A distal end of the channel forms an air outlet.

Abstract: An electronic device includes a chassis and an air guiding apparatus. The chassis includes a bottom wall, a first sidewall, a second sidewall, a first end wall, a second end wall, a circuit board mounted on the bottom wall, and a fan. The air guiding apparatus includes a flexible air guiding piece. The first and second end walls each define a number of vents. A chip is mounted on the circuit board. The fan is installed in the chassis adjacent to the vents of the second end wall. The air guiding apparatus is fixed to the first end wall. A first end of the air guiding piece is stretchable to be fixed to the second end wall. The air guiding piece, the first sidewall, the first end wall, and the second end wall cooperatively bound an airflow channel for receiving the fan and the chip.

Abstract: In a casing, a printed circuit board is arranged such that a first side of the printed circuit board has a first angle of ?° with respect to a first side surface plate. A cooling device is arranged to have a second angle of ? with respect to the first side surface plate. Accordingly, an amount of cooling air flowing in and out via an air intake port and an air discharge port may be increased. Furthermore, by reducing the angle of the change in the flow direction of the cooling air flowing over the printed circuit board, the cooling air flowing over the printed circuit board may be made to efficiently flow through an air discharge port 119a. Furthermore, the efficiency with which a heat-generating component on the printed circuit board is cooled may be improved.

Abstract: A small form factor desktop computing device having a suitable internal cooling arrangement is disclosed. The device can be formed of a single piece seamless housing machined from a single billet of aluminum. The single piece seamless housing includes an aesthetically pleasing foot support having at least a portion formed of RF transparent material that provides easy user access to selected internal components as well as offers electromagnetic shielding. The device can also include a removable foot, a heat producing element, a fan, an air processing manifold having a plurality of angled fins, and a heat exchanger.

Abstract: A filter fan of a switch cupboard or of an electrical and/or electronic device placed in a casing with a blast producing an air flow and with a filter element (3) which is placed in the air flow and separates a clean side, on which the blast is placed, from an unclean side, wherein the filter element is held in a frame which can be fixed on the casing by covering the air passage opening penetrating through the casing wall and wherein a protective grid (4) is placed between the filter element (3) and the blast, the invention proposes that a bridging-free distance is provided between the filter surface of the filter element (3) and the protective grid (4), wherein this distance is dimensioned so as to make possible the discharge of water drops on the clean side surface of the filter element and to avoid a contact of the water drops with the protective grid.

Abstract: A container includes first and second long sides parallel to the container's length. Racks are organized in rows parallel to the container's width. Each rack is receptive to installation of equipment along a height of the data rack parallel to the container's height. Openings are defined within the first and/or second long sides of the container. Heat exchangers may be installed, where each exchanger is installed on a rack to cool air exhausted by any equipment installed on this rack. Each row may include as many of the racks positioned side-to-side, length-wise, and parallel to the width of the container as can fit within the container. The racks of each row may be slidable in unison back and forth along the length of the container, between a first position at which the racks block an opening and a second position at which the racks block another opening.

Abstract: In an axial fan, a housing includes a side wall arranged to surround an outer circumference of an impeller, and a substantially square or substantially rectangular flange arranged to project radially outward from an outer circumferential surface of the side wall. The side wall preferably includes three slit groups each including a plurality of slits arranged in a circumferential direction and arranged to extend through the side wall from an inner circumferential surface to the outer circumferential surface thereof. Two of the slit groups are defined in portions of the side wall which correspond to two adjacent corner portions in an upper half portion of the flange, while the remaining slit group is defined in a portion of the side wall which corresponds to a lower half portion of the flange. The upper and lower half portions are divided at a line parallel or substantially parallel to two opposing sides of the flange and passing through a central axis.

Abstract: A mounting apparatus includes a bracket and two shafts. The bracket includes a fixing plate defining a number of horizontally arranged vents, for mounting a number of fans to the rear side of the fixing plate, with each vent aligning with one of the fans. The shafts are respectively and horizontally mounted to a top and a middle of a front side of the bracket. A number of shield plates are rotatably connected to the shafts. The shield plates hang vertically under the corresponding shafts by gravity. Each of the vents is covered by two vertically aligned shield plates upon a condition that the gravity of the two shield plates are not overcome by airflows passing through the vents.

Abstract: A system and method of reducing consumption of electricity used to cool electronic computer data center, networking, and telecommunications equipment, and to reduce the incidence of thermal failure of electronic components, includes provision 5 of one or more partitions to reduce the volume of the cooled environment supplying coldest possible cooled air from air conditioning systems to a chamber adjacent to racks containing the electronic components, preventing dilution of the supplied cooling airflow by warmer air from outside of the reduced volume environment, and controlling the delivery of cooling air flow through the reduced volume of the cooled environment.

Abstract: An apparatus with a handle having a release mechanism comprises a bracket having a front panel, an extracting module and a driven module. The extracting module is mounted on the bracket and includes a handle, an extracting piece, and a first contact portion. A spring is provided between the front panel and the extracting piece. The driven module is fixed on the bracket and includes a driven piece having a locking portion and a second contact portion. When the handle is not dragged forward, the locking portion is located in a locked position. When handle is dragged forward so that the extracting piece moves towards the front panel and that the first contact portion pushes the second contact portion, the locking portion is moved to an unlocked position. A system containing an apparatus having a handle is also provided.

Abstract: A fan frame includes a blade holder, a pair of ventilation plates, and at least one side plate. The pair of ventilation plates is attached to opposite sides of the blade holder along a first direction and includes a pair of securing blocks. The at least one side plate is attached to the blade holder along a second direction substantially perpendicular to the first direction and located between the pair of ventilation plates. The pair of mounting slots is defined in the at least one side plate and engaged with the pair of securing blocks, thereby securing the pair of ventilation plates and the at least one side plate to the blade holder.

Abstract: A rotation speed control circuit is disclosed. The rotation speed control circuit includes a temperature-controlled voltage duty generator, a pulse-width signal duty generator, a multiplier and a rotation speed signal generator. The temperature-controlled voltage duty generator converts temperature-controlled voltage to digital temperature-controlled voltage and executes linear interpolation operation according to a first setting data so as to output temperature-controlled voltage duty signal. The pulse-width signal duty generator coverts pulse-width input signal to a digital pulse-width input signal and executes linear interpolation operation according to a second setting data so as to output a pulse-width duty signal. The temperature-controlled voltage duty signal and the pulse-width duty signal are executed for multiplication by the multiplier so as to output mixing-duty signal.

Abstract: A delay circuit for a fan includes a signal generation circuit, a first switch, a delay microchip, and a second switch. The signal generation circuit receives a driving signal and generates a control signal according to the driving signal. The first switch is electronically connected to the signal generation circuit to receive the control signal. The second switch is electronically connected between the delay microchip and the fan. When the signal generation circuit is electronically connected to the fan via the first switch, the control signal is transmitted to the fan to activate the fan. When the signal generation circuit is electronically connected to the delay microchip, the delay microchip receives the control signal and outputs a delayed control signal after a predetermined delay time, and the delayed control signal is transmitted to the fan via the second switch to activate the fan.

Abstract: A fan anti-corrosion structure includes a base seat, a circuit board and at least one coating unit. The base seat has a sidewall and a bearing cup. A rest face extends from the sidewall toward the bearing cup. The circuit board is fitted around the bearing cup and disposed on the rest face. A closed space is defined between the circuit board and the base seat. The coating is coated on the circuit board. The circuit board is protected from the corrosion of the moisture and the salt fog by the coating unit and the closed space. Also, the cost of the mold for forming the coating unit is saved to lower the manufacturing cost.

Abstract: A deflection device and an electronic device are disclosed. The deflection device is located in the electronic device for guiding airflow generated by a fan device to at least one electronic component. The deflection device includes a first fixed part and a plurality of strip structures. The first fixed part is used for fixing the deflection device in a suitable position. One end of each of the strip structures is connected to the first fixed part and able to undergo compression deformation independently such that forms a first shape when not compressed or a second shape when compressed. When the deflection device is fixed in a suitable position of the electronic device and close to the electronic component, the shape of the at least one strip structure is changed from a first shape to a second shape for guiding the airflow to the electronic component.

Abstract: A mounting device for mounting a fan includes a base board and two fixing assemblies. The fan includes two opposite boards. The base board forms four rods. Each fixing assembly includes a receiving member and an engaging member. The receiving member includes a first pole capable of extending through a corresponding one of the boards and a first block abutting against an outer surface of the board. The engaging member includes a second pole capable of extending though the other one of the boards to be engaged in the first pole, and a second block abutting against an outer surface of the other board. Each of the first and second blocks defines a fixing hole through which a corresponding one of the rods is capable of extending.

Abstract: A computer system includes a computer case, an enclosure, and a heat dissipating device. The computer case includes a rear plate with a plurality of ventilation holes. The enclosure includes a separating portion to divide the computer case into a first receiving area and a second area. The heat dissipating device includes a first heat sink, a second heat sink, a heat pipe and a fan. The first heat sink is attached to a chip, and the fan communicates with the second heat sink. The first heat sink and the fan are received in the first receiving area, and the second heat sink is received in the second receiving area. The heat pipe extends through the separating portion, and the plurality of ventilation holes, the first heat sink, the fan, the heat pipe, and the second heat sink together defines an air path for air flowing through.

Abstract: A system for controlling the temperature of a rack includes a connecting plenum configured to receive incoming cooling air from outside a rack for cooling the rack; a front plenum connected to the connecting plenum and configured to receive cooling air from the connecting plenum and deliver the cooling air to the rack, the cooling air being warmed by powered electrical components as it passes through the rack; at least one ventilator for recycling warmed cooling air from the rack back to the connecting plenum to be mixed with incoming cooling air; a sensor for sensing temperature of air in the rack; and a controller for controlling the at least one ventilator based at least on the sensed temperature.

Abstract: An approach is provided in which a cooling manager detects a failed fan included in an electronic enclosure. The electronic enclosure includes multiple fans that each cool different component areas in the electronic enclosure. The cooling manager selects an airflow compensator that corresponds to a functioning fan included in the electronic enclosure, which includes a fixed perforated member and a movable perforated member. In turn, the cooling manager adjusts the selected airflow compensator to redirect a portion of airflow generated by the functioning fan to the component area corresponding to the failed fan.

Abstract: A motor driving system including command value output means configured to output an analog value according to a rotation speed command; a first power line having first switching means; a drive circuit, to which power is supplied via the first switching means and the first power line, driving a motor supplying rotation based on the analog value; and switching control means configured to make the first switching means nonconductive when the analog value is smaller than a first predetermined value, and independent of the command value output means.

Abstract: A three-phase non-linear transformer is cooled by first (30) and second fans (40). The first fan (30) is attached to the first core clamps (12) of the transformer using a first mounting structure (15). The second fan (40) is attached to the second core clamps (24) of the transformer using a second mounting structure (17). The first fan is positioned first so that air is directed toward a central passage of the core. The second fan is positioned so that air is drawn through the central passage of the core. The first fan circulates air through a central passage in the transformer core and channels that exist between adjacent coil assemblies. The second fan draws air through the central passage and channels and further expels the air into the surrounding environment. The first and second fans are controlled by a control panel through which they are run automatically or manually.

Abstract: An example apparatus and method for preventing component overheating and extending system survivability of an appliance is provided and may include a component assembly configured to be inserted in a first slot of the appliance. The component assembly may include a door disposed on its side and extending substantially along the length of the component assembly. The door is movable between a first and a second position and the component assembly is configured so that when the component assembly is inserted in the first slot and the trap door is in the second position, the trap door provides a barrier to airflow in a second slot of the switch that is adjacent to the first slot when a second component assembly has been removed from the second slot.

Abstract: A server cabinet includes a rack, two slide rails, a server, and two brackets. Two first posts are formed at a front end of the rack, and two second posts are formed at a rear end of the rack. Each slide rail is fastened between the corresponding first post and second post. The server is connected between the slide rails and includes two opposite side plates. Each side plate and the corresponding slide rail bound a channel. Electronic components are mounted in a front end of the server. The brackets are fastened to the server and respectively fastened to front ends of the slide rails. A number of first through holes are defined in one of the brackets, aligning with the corresponding channel. A number of second through holes are defined in the side plate near the first through holes, behind the electronic components.

Abstract: A heat transfer device is described. In one or more implementations, a heat transfer device includes a heat sink and a thermal storage enclosure disposed proximal to at least a portion of the heat sink. The thermal storage enclosure configured to be disposed proximal to a heat-generating component of a device. The thermal storage enclosure includes a phase change material configured to have a melting temperature that is below a temperature at which a cooling fan of the device is set to operate to cool the heat-generating device.

Abstract: A multi-floor data center, comprising in one implementation, a plurality of floors; a first set of server racks disposed about a first vertical center axis on each floor, the first set of server racks formed in a substantially closed shape, with a substantially vertical open center comprising a first airflow plenum at least for air flow; a first opening in each of the floors, with the first opening aligned with the substantially vertical first airflow plenum on it respective floor, wherein the substantially vertical first airflow plenums on the floors are aligned for communication through the first openings in the floors; outer wall; a roof with a roof opening therein.

Abstract: An air containment cooling system for containing and cooling air between two rows of equipment racks includes a canopy assembly configured to enclose a hot aisle defined by the two rows of equipment racks, and a cooling system embedded within the canopy assembly. The cooling system is configured to cool air disposed within the hot aisle. Other embodiments and methods for cooling are further disclosed.

Abstract: In the electronic device, an inlet 10 is provided on a front face 1c of a first housing 1. Thus, it is possible to reduce the possibility of the inlet 10 being blocked by objects. That is, when a user uses a notebook computer in a normal position, his body opposes the front face 1c in many cases. Thus, when the inlet is provided on the front face 1c, the inlet is less likely to be blocked than when it is provided on any other face of the first housing 1. For this reason, the cooling efficiency within the first housing 1 does not drop.