Abstract: This electric compressor control device comprises: a control unit of an inverter which controls a motor that drives a compressor; a physical quantity calculation unit which calculates, on the basis of one or a plurality of predetermined detection values acquired from the inverter, a physical quantity that varies depending on a workload of the compressor; a number-of-revolutions acquisition unit which acquires the number of revolutions of the motor; a storage unit which stores information representing a first threshold that varies depending on the number of revolutions of the motor, and defines whether or not the physical quantity is a normal value; and a refrigerant abnormality determination unit which determines whether or not there is an abnormality in a refrigerant system by comparing the calculated physical quantity with the first threshold, depending on the acquired number of revolutions.

Abstract: A sealing device is disposed between a stationary body and a rotating body and is configured to suppress flow of a fluid from a high-pressure side to a low-pressure side. The sealing device includes: a sealing member movably supported by the stationary body in an axial direction and a radial direction of the rotating body; a seal fin extending from the sealing member to the rotating body side; a pressure adjustment space provided between the stationary body and a high-pressure-side end surface of the sealing member; and a communication passage having one end communicating with the low-pressure side and the other end communicating with the pressure adjustment space.

Abstract: Provided is a polyvinylidene fluoride resin composition that has good inorganic pigment dispersivity. Based on 100 parts by mass of a resin component containing two types of polyvinylidene fluorides having different forms or different melt flow characteristics in a total amount of 50 to 95% by mass and polymethyl methacrylate in an amount of 5 to 50% by mass, 7 to 40 parts by mass of a white inorganic pigment and 0.01 to 7 parts by mass of an inorganic pigment for toning are mixed to produce the resin composition. At that time, at least one of the two types of polyvinylidene fluorides to be used has an MFR (230° C., 3.8 kg load) of 3 to 35 g/10 min and the polymethyl methacrylate to be used has an MFR (230° C., 10 kg load) of 2 to 20 g/10 min.

Abstract: Provided are a polyvinylidene fluoride resin composition that has good inorganic pigment dispersivity and that is unlikely to cause a defect due to poor dispersion and has practical mechanical strength characteristics in a film to be formed, and a film, a back sheet, and a solar cell module. Based on 100 parts by mass of a resin component containing two types of polyvinylidene fluorides having different forms or different melt flow characteristics in a total amount of 50 to 95% by mass and polymethyl methacrylate in an amount of 5 to 50% by mass, 7 to 40 parts by mass of a white inorganic pigment and 0.01 to 7 parts by mass of an inorganic pigment for toning are mixed to produce the resin composition. At that time, at least one of the two types of polyvinylidene fluorides to be used has an MFR (230° C., 3.8 kg load) of 3 to 35 g/10 min and the polymethyl methacrylate to be used has an MFR (230° C., 10 kg load) of 2 to 20 g/10 min.