Abstract: With respect to a housing device having a plurality of slots in which plug-in units are mountable, division plates corresponding to the positions of the openings of the slots are put in the inside of a baffle section for changing the direction of the flow of cooling air released from the slots, and the division plates are used to divide the inside space of the baffle section into a plurality of regions corresponding to the slots, thereby reducing mutual interference of the cooling air from the slots in the baffle section and preventing a further increase in differences in the amount of passing air among the slots. Thereby, even if any difference occurs in the amount of passing air among the slots due to a structural factor, it is possible to reduce the deterioration of the cooling capacity of a slot through which relatively less amount of air passes.

Abstract: An air blowing device including; a fan mounted on at least one of an upper part and a lower part of a shelf; a louver having a louver board that extends in a direction intersecting with a direction of plugging in of a plug-in unit; and a louver controller to control the direction of the louver board based on a change of the mounting status of plug-in units housed in the shelf.

Abstract: With respect to a housing device having a plurality of slots in which plug-in units are mountable, division plates corresponding to the positions of the openings of the slots are put in the inside of a baffle section for changing the direction of the flow of cooling air released from the slots, and the division plates are used to divide the inside space of the baffle section into a plurality of regions corresponding to the slots, thereby reducing mutual interference of the cooling air from the slots in the baffle section and preventing a further increase in differences in the amount of passing air among the slots. Thereby, even if any difference occurs in the amount of passing air among the slots due to a structural factor, it is possible to reduce the deterioration of the cooling capacity of a slot through which relatively less amount of air passes.

Abstract: A determining method includes: holding a cooled device in a container; detecting a temperature inside the container; detecting a temperature outside the container; facilitating a airflow through an air filter that allows air to flow therethrough between the container and a space outside the container; calculating a packing density of components of the cooled device; detecting a power consumption of the cooled device; detecting the number of revolutions of a fan that facilitates the flow of air through the air filter; and determining that the air filter is clogged when the power consumption is less than or equal to a power threshold value, the number of revolutions is within a specified range, and a difference between the temperature inside the container and the temperature outside the container exceeds a temperature threshold value that depends on the packing density and the power consumption.

Abstract: An electronic device having an exhaust opening configured to exhaust air outside, the electronic device includes a door part configured to close the exhaust opening when the electronic device has a predetermined temperature, wherein the door part is rotated based on the own weight of the door part and a wind pressure of the air taken in the electronic device and exhausted outside the electronic device, so that the exhaust opening is closed.

Abstract: A heat transfer mechanism for dissipating heat from a heat generating body to a heat dissipating part, realizing both a high elasticity and a high thermal conductivity, comprised of a film-shaped heat conductor for transferring heat to the heat dissipating part and an elastic member for imparting elasticity to the film-shaped heat conductor, the film-shaped heat conductor being formed from metal foil-type flexible heat pipes or carbon-based thermal conductive sheets.

Abstract: A heat transfer mechanism for dissipating heat from a heat generating body to a heat dissipating part, realizing both a high elasticity and a high thermal conductivity, comprised of a film-shaped heat conductor for transferring heat to the heat dissipating part and an elastic member for imparting elasticity to the film-shaped heat conductor, the film-shaped heat conductor being formed from metal foil-type flexible heat pipes or carbon-based thermal conductive sheets.

Abstract: An electronic device having an exhaust opening configured to exhaust air outside, the electronic device includes a door part configured to close the exhaust opening when the electronic device has a predetermined temperature, wherein the door part is rotated based on the own weight of the door part and a wind pressure of the air taken in the electronic device and exhausted outside the electronic device, so that the exhaust opening is closed.

Abstract: A communication device which has high cooling efficiency and can be reduced in size and weight. The communication device in which a plurality of electronic circuit boards are mounted to a back wiring board (BWB) includes a casing containing the electronic circuit boards as a unit, an intake fan unit for introducing air into the casing to cool the electronic circuit boards, and a discharge fan unit having a plurality of blower fans each arranged such that air intake and discharge directions thereof form an angle of nearly 90 degrees, the blower fans discharging the air introduced into the casing. Combined use of an axial fan and the blower fans permits air to be introduced into and discharged from the casing from rear and front sides, respectively, of the casing, whereby spaces that the fan units occupy in the communication device can be reduced.

Abstract: The present invention relates to a fan unit used for forced air cooling, a motherboard with predetermined wiring formed as a wiring pattern, disposed on the rear face of an equipment, and an electronic equipment provided with the fan unit and the motherboard. It is an object of the present invention to reliably maintain appropriate forced air cooling at low cost. For this purpose, the fan unit of the present invention measures temperatures of predetermined places in parallel, processes each of combinations of these temperatures, outputs the processing result via lines whose number is equal to the number of the combinations, and maintains the revolving speed of fans at a value suitable for the processing result obtained via these lines.

Abstract: It is an object of the present invention to provide a cabinet capable of containing various devices and securely attaching/detaching an additional device thereto/therefrom, and to provide an additional device. In order to achieve the object, a cabinet according to the present invention includes: a conductive cylinder having an aperture into which the additional device is fitted by insertion and containing an electronic device, the aperture having a folded edge, the additional device operating in parallel with the electronic device; and a reinforcing member supported with a portion of an inner wall of the cylinder and disposed on a boundary between two areas inside the cylinder where the electronic device and the additional device are disposed respectively, the portion of the inner wall being more inside than the folded portion of the aperture.

Abstract: A telecommunications apparatus that has a substantially box-shaped subrack having a back wiring board mounting a connector and a plurality of shell-type plug-in units inserted in the subrack so that a connector of each of the plug-in units is connected to the connector of the subrack, further includes a flexible, electrically conductive seal member elastically deformedly disposed between a lateral surface of the plug-in unit inserted into the subrack and an interior portion of the subrack so as to enclose both the plug-in unit connector.

Abstract: A heat transfer mechanism for dissipating heat from a heat generating body to a heat dissipating part, realizing both a high elasticity and a high thermal conductivity, comprised of a film-shaped heat conductor for transferring heat to the heat dissipating part and an elastic member for imparting elasticity to the film-shaped heat conductor, the film-shaped heat conductor being formed from metal foil-type flexible heat pipes or carbon-based thermal conductive sheets.

Abstract: It is an object of the present invention to provide a cabinet capable of containing various devices and securely attaching/detaching an additional device thereto/therefrom, and to provide an additional device. In order to achieve the object, a cabinet according to the present invention includes: a conductive cylinder having an aperture into which the additional device is fitted by insertion and containing an electronic device, the aperture having a folded edge, the additional device operating in parallel with the electronic device; and a reinforcing member supported with a portion of an inner wall of the cylinder and disposed on a boundary between two areas inside the cylinder where the electronic device and the additional device are disposed respectively, the portion of the inner wall being more inside than the folded portion of the aperture.

Abstract: A communication device which has high cooling efficiency and can be reduced in size and weight. The communication device in which a plurality of electronic circuit boards are mounted to a back wiring board (BWB) includes a casing containing the electronic circuit boards as a unit, an intake fan unit for introducing air into the casing to cool the electronic circuit boards, and a discharge fan unit having a plurality of blower fans each arranged such that air intake and discharge directions thereof form an angle of nearly 90 degrees, the blower fans discharging the air introduced into the casing. Combined use of an axial fan and the blower fans permits air to be introduced into and discharged from the casing from rear and front sides, respectively, of the casing, whereby spaces that the fan units occupy in the communication device can be reduced.

Abstract: The present invention relates to a thermal diffuser which having a path for close thermal coupling uniformly between an electronic component mounted in an electronic equipment and a desired thermal conductor, and also to a radiator for radiating heat generated in this electronic component via the thermal diffuser. The object of the present invention is to realize flexible adaptability to various devices which are to undergo temperature control at low cost, and to efficiently achieve the temperature control. For this purpose, the thermal diffuser of the present invention has a plate-shaped structure which can be welded or bonded to the case of the electronic component to undergo heat exchange with the exterior and has a channel formed in mesh by a plurality of protrusions with confined heat medium recirculating therethrough.

Abstract: A communication apparatus including a metallic shelf having a pair of side plates, a back wiring board mounted in the shelf on the back side thereof and having a plurality of first connectors and a solid ground pattern, and upper and lower guide plates mounted in the shelf, each guide plate having a plurality of guide rails and a plurality of vent holes. A first shield board having numerous openings is mounted on the upper guide plate, and a second shield board having numerous openings is mounted on the lower guide plate. A plurality of plug-in units are mounted in the shelf so as to be inserted along the guide rails of the upper and lower guide plates.

Abstract: A communication apparatus including a metallic shelf having a pair of side plates, a back wiring board mounted in the shelf on the back side thereof and having a plurality of first connectors and a solid ground pattern, and upper and lower guide plates mounted in the shelf, each guide plate having a plurality of guide rails and a plurality of vent holes. A first shield board having numerous openings is mounted on the upper guide plate, and a second shield board having numerous openings is mounted on the lower guide plate. A plurality of plug-in units are mounted in the shelf so as to be inserted along the guide rails of the upper and lower guide plates.

Abstract: The present invention relates to a thermal diffuser which having a path for close thermal coupling uniformly between an electronic component mounted in an electronic equipment and a desired thermal conductor, and also to a radiator for radiating heat generated in this electronic component via the thermal diffuser. The object of the present invention is to realize flexible adaptability to various devices which are to undergo temperature control at low cost, and to efficiently achieve the temperature control. For this purpose, the thermal diffuser of the present invention has a plate-shaped structure which can be welded or bonded to the case of the electronic component to undergo heat exchange with the exterior and has a channel formed in mesh by a plurality of protrusions with confined heat medium recirculating therethrough.

Abstract: The present invention relates to a fan unit used for forced air cooling, a motherboard with predetermined wiring formed as a wiring pattern, disposed on the rear face of an equipment, and an electronic equipment provided with the fan unit and the motherboard. It is an object of the present invention to reliably maintain appropriate forced air cooling at low cost. For this purpose, the fan unit of the present invention measures temperatures of predetermined places in parallel, processes each of combinations of these temperatures, outputs the processing result via lines whose number is equal to the number of the combinations, and maintains the revolving speed of fans at a value suitable for the processing result obtained via these lines.