Abstract: A power converter includes a capacitor and a substrate on which a plurality of switching elements for power conversion are mounted. The power converter includes a cooler for cooling the plurality of switching elements and a housing that accommodates the capacitor, the substrate, and the cooler. The power converter includes a power connector exposed from the housing and an output connector exposed from the housing. The power converter includes a plurality of lines that include a plurality of power lines each electrically connected to the capacitor, given switching elements, and the power connector. The plurality of lines include a plurality of output lines each electrically connected to given switching elements and the output connector. At least one among the plurality of lines is a line that includes a conductive pattern formed on the substrate.

Abstract: A power converter includes a positive busbar electrically connected to a positive terminal and the first capacitor electrode, and includes a negative busbar electrically connected to a negative terminal and the second capacitor electrode. The power converter includes output busbars each electrically connected to a given output terminal among multiple output terminals, a given high-side switching element among a plurality of high-side switching elements, and a given low-side switching element among a plurality of low-side switching elements. The power converter includes a cooler that cools the high-side switching elements and the low-side switching elements. The power converter includes a housing that accommodates a supply tube and a discharge tube. The positive terminal, the negative terminal, the output terminals, the inlet port, and the outlet port are exposed on the housing. The inlet port, the outlet port, the supply tube, and the discharge tube are separate members from the housing.

Abstract: A power converter includes a capacitor and a substrate on which a plurality of switching elements for power conversion are mounted. The power converter includes a cooler for cooling the plurality of switching elements and a housing that accommodates the capacitor, the substrate, and the cooler. The power converter includes a power connector exposed from the housing and an output connector exposed from the housing. The power converter includes a plurality of lines that include a plurality of power lines each electrically connected to the capacitor, given switching elements, and the power connector. The plurality of lines include a plurality of output lines each electrically connected to given switching elements and the output connector. At least one among the plurality of lines is a line that includes a conductive pattern formed on the substrate.

Abstract: A finned tube heat exchanger includes a plurality of tube arrays, each of which includes a plurality of heat transfer tubes that each extend parallel to one another and are disposed at a predetermined pitch in a first direction that intersects a flow direction of heat exchanging air, in a second direction that intersects the first direction, any closest two of the plurality of tube arrays having a predetermined distance therebetween. One closest two tube arrays includes first and second tube arrays that respectively include a plurality of first heat transfer tubes and a plurality of second heat transfer tubes. When seen from the flow direction, each first heat transfer tube is disposed closer to one of an adjacent two second heat transfer tubes that is closest to said each first heat transfer tube, than to the other one of the adjacent two second heat transfer tubes.

Abstract: A power converter includes a positive busbar electrically connected to a positive terminal and the first capacitor electrode, and includes a negative busbar electrically connected to a negative terminal and the second capacitor electrode. The power converter includes output busbars each electrically connected to a given output terminal among multiple output terminals, a given high-side switching element among a plurality of high-side switching elements, and a given low-side switching element among a plurality of low-side switching elements. The power converter includes a cooler that cools the high-side switching elements and the low-side switching elements. The power converter includes a housing that accommodates a supply tube and a discharge tube. The positive terminal, the negative terminal, the output terminals, the inlet port, and the outlet port are exposed on the housing. The inlet port, the outlet port, the supply tube, and the discharge tube are separate members from the housing.

Abstract: A power converter includes a capacitor and a substrate on which a plurality of switching elements for power conversion are mounted. The power converter includes a cooler for cooling the plurality of switching elements and a housing that accommodates the capacitor, the substrate, and the cooler. The power converter includes a power connector exposed from the housing and an output connector exposed from the housing. The power converter includes a plurality of lines that include a plurality of power lines each electrically connected to the capacitor, given switching elements, and the power connector. The plurality of lines include a plurality of output lines each electrically connected to given switching elements and the output connector. At least one among the plurality of lines is a line that includes a conductive pattern formed on the substrate.

Abstract: An air conditioner sucks air exhausted from an information processor, and cools down the sucked air. The air conditioner exhausts the cooled air. The air conditioner acquires a cooling state, determines whether a cooling capacity exceeds an upper limit value, and reduces the volume of exhaust air when it is determined that the cooling capacity exceeds the upper limit value. For example, the air conditioner calculates a thermal load as the cooling state by using the volume of exhaust air, a difference between the temperature of exhaust air and the temperature of suction air, and determines that the cooling capacity exceeds the upper limit value when the calculated thermal load exceeds a given threshold. The air conditioner measures the temperature of exhaust air, and determines that the cooling capacity exceeds the upper limit value when the measured temperature exceeds a set value.

Abstract: An air-conditioning system includes a ceiling plenum disposed above a ceiling of a room; an air-conditioning machine disposed in an internal space of the room; a plurality of IT apparatus mounting racks disposed in a plurality of rows, with rear faces of the IT apparatus mounting racks in adjacent two rows opposed to each other; a upper partitioning board disposed between an upper face of the plurality of IT apparatus mounting racks and the ceiling; an end-partitioning board disposed between each of ends of a space between adjacent two rows of the plurality of IT apparatus mounting racks and the ceiling; and a ceiling opening portion provided in the ceiling above a warm-air space enclosed by the upper partitioning board and the end-partitioning board. The ceiling opening portion connects the warm-air space with the ceiling plenum.

Abstract: An air conditioner sucks air exhausted from an information processor, and cools down the sucked air. The air conditioner exhausts the cooled air. The air conditioner acquires a cooling state, determines whether a cooling capacity exceeds an upper limit value, and reduces the volume of exhaust air when it is determined that the cooling capacity exceeds the upper limit value. For example, the air conditioner calculates a thermal load as the cooling state by using the volume of exhaust air, a difference between the temperature of exhaust air and the temperature of suction air, and determines that the cooling capacity exceeds the upper limit value when the calculated thermal load exceeds a given threshold. The air conditioner measures the temperature of exhaust air, and determines that the cooling capacity exceeds the upper limit value when the measured temperature exceeds a set value.

Abstract: A computer room air-conditioning system includes a temperature detection unit which is provided for each of a front and a back of each rack, and measures air temperatures of the front and the back; and a control device for acquiring a measured temperature by each temperature detection unit, and performing control based on the measured temperature. With the configuration, the control device includes a temperature difference calculation unit for calculating a temperature difference between cool air at the front and warm air at the back of each rack based on each measured and acquired temperature; and a heating element cooling control unit for controlling by adjustment an amount of flow of cool air from the underfloor space to the computer room based on the calculated temperature difference.