Daikin Industries Patente

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To provide a technique capable of easily monitoring the state of an object. For example, the information processing apparatus 40 according to one embodiment of the present disclosure acquires a time-series measurement signal of the acoustic emission of the mechanical seal 52D, calculates the energy of the acoustic emission based on the measurement signal, extracts a time-series signal of the periodicity-removed component obtained by removing the periodicity component from the time-series signal of the calculated energy or a time-series signal of the periodicity component, and calculates the standard deviation σ2 of the extracted time-series signal of the periodicity-removed component or the standard deviation σ1 of the time-series signal of the periodicity component.

During driving of an axial gap-type motor, an abnormal noise having a peak of a sound pressure level at a frequency near a natural frequency of an air gap between a rotor and a stator is generated by minute vibration in an axial direction of the rotor. A motor (40) includes a rotor (50, 60) and a stator (70). The rotor (50, 60) has a disk shape. The stator (70) faces the rotor (50, 60) across an air gap (G1, G2) in the axial direction of the rotor (50, 60). The stator (70) includes a plurality of stator cores (71) and a coil (72) wound around each of the stator cores (71). A plurality of the stator cores (71) is annularly arranged when viewed from the axial direction of the rotor (50, 60). The rotor (50, 60) has a plurality of through holes (54, 64) penetrating in the axial direction of the rotor (50, 60). The plurality of through holes (54, 64) is provided on a radially inner side of the rotor (50, 60) with respect to the coils (72) when viewed from the axial direction of the rotor (50, 60).

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Provided is a polychlorotrifluoroethylene containing chlorotrifluoroethylene unit, wherein a content of chlorotrifluoroethylene unit is 95.0 to 100 mol% relative to all monomer units, and a ratio, (A)/(B), of a peak area (A) derived from a double bond relative to a peak area (B) derived from a main backbone is 0.020% or less.

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A centrifugal fan (11) is provided with: a first member (13) attached to a rotating shaft (12); a second member (14) provided at a position facing the first member (13); and a blade (21) disposed between the first member (13) and the second member (14). The blade (21) includes a solid part (22) and a pressure fluctuation suppression part (31). The pressure fluctuation suppression part (31) is provided on the pressure surface or the suction surface of the blade (21). The blade (21) has a front edge (21a) positioned on the radially inner side and a rear edge (21 b) positioned on the radially outer side. The position of the center of gravity of the surface of the pressure fluctuation suppression part (31) is closer to the front edge (21a) than to the rear edge (21b).

A compressor includes a compression mechanism, a casing that houses the compression mechanism, a terminal body that is fixed to an outer wall of the casing and holds a terminal rod to which a wire to a device in the casing is connected, and a terminal box that is fixed to the outer wall of the casing and houses the terminal rod held by the terminal body. The terminal body protrudes in a direction away from the casing. The terminal box includes a bottom wall fixed to the outer wall of the casing, a hole formed in the bottom wall and through which the terminal body passes, and a tubular portion extending from a peripheral edge of the hole in the direction away from the casing. The terminal body is inserted into the tubular portion.

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A method for manufacturing a constituent member configured to constitute an air passage (S2) formed within a predetermined device (20) and to be in contact with air flowing through the air passage (S2) includes: a first step of forming an assembly (51) of a plate-shaped porous member (53) and a frame member (52) by fixing the porous member (53) to an inner frame of the frame member (52); and a second step of integrating the assembly (51) and the constituent member (41, 62) with each other by providing the assembly (51) in a first region (R) of the constituent member (41, 62).

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An air blowing structure (21) comprises: a cross flow fan (22); and a housing (30) provided with the cross flow fan (22). The housing (30) has a case part (31) having a suction port (39) through which air is sucked, and a first member (41). The first member (41) has a tongue part (44) that partitions a suction region (SR) in which air is sucked into the cross flow fan (22) and a blowout region (BR) from which air is blown out from the cross flow fan (22), and a blowout part (43) positioned closer to a blowout port (40) side than the tongue part (44). The tongue part (44) is composed of a non-porous material, a part of the blowout part (43) is composed of a porous material (51), and the porous material (51) is provided from an upper surface (43a) to a lower surface (43b) of the blowout part (43).

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