Abstract: In a screw compressor, on a bearing side relative to a discharge port of a compression chamber in a casing, an intermediate-pressure chamber to which an intermediate-pressure coolant is supplied from outside of the casing is provided in a high-pressure space surrounded by an outer cylinder and an intermediate cylinder of the casing and communicating with the discharge port, and the intermediate-pressure coolant has a temperature and a pressure that are lower than those of a coolant in the high-pressure space and higher than a coolant in a low-pressure space on a motor side relative to the discharge port in the casing. The intermediate-pressure chamber and the low-pressure space communicate with each other.

Abstract: Provided is an optical lens formed by integrally molding a lens part that is an optically effective portion and has a light incidence/emission surface, and a lens edge part that is an optically ineffective portion and has a surface thereof except the light incidence/emission surface. The lens edge part includes a non-transparent region in part or all thereof, the lens part and the lens edge part include a thermoplastic resin, and the non-transparent region in the lens edge part contains a total of 0.1-5 mass % of one or more of a black dye and a black pigment.

Abstract: A connector (50) includes a tubular member (52) and a base tube (58). A light-guiding tube (60) is drawn out from the base tube (58) toward the opposite side to the tubular member (52). An adapter (1) includes: a first connecting portion (10) that can be connected to and disconnected from a light source device (70); a second connecting portion (20) that can be connected to and disconnected from the connector (50); and a light-guiding member (30) that guides light emitted from the light source device (70) to a proximal end surface (61) of the tube (60).

Abstract: A screw compressor has a slide valve movement mechanism that includes a cylinder provided in a casing body, a piston partitioning an interior of the cylinder into a first chamber and a second chamber, and a communication flow passage through which the second chamber communicates with a low-pressure space. The cylinder includes a first inflow hole, a second inflow hole, and a third inflow hole. The first chamber communicates with a high-pressure space through the first inflow hole, the second chamber communicates with the low-pressure space through the second inflow hole and the communication flow passage, and the second chamber communicates with the high-pressure space through the third inflow hole. The third inflow hole is located at a position at which the third inflow hole is closed by the piston when the piston lies at a stop position at which the piston moves toward the second chamber and stops.

Abstract: A thermoplastic resin composition for an optical material is provided. The thermoplastic resin composition contains a compounding agent represented by general formula (1). (In general formula (1), R1 to R5 independently represent a hydrogen atom, or an alkyl group having 1 to 20 carbon atoms in total which may have a substituent; R6 to R9 independently represent a hydrogen atom, or an alkyl group having 1 to 20 carbon atoms in total which may have a substituent; and R10 represents a hydrogen atom, or an alkyl group having 1 to carbon atoms in total.

Abstract: A refrigeration cycle apparatus comprises: a refrigerant cycle circuit, a condenser, a pressure-reducing device and an evaporator are sequentially connected by pipes; an injection circuit that branches off from the refrigerant cycle circuit between the condenser and the pressure-reducing device and is connected to the injection flow passage; a flow rate control device provided in the injection circuit or the injection flow passage; and a controller configured to control the flow rate control device. At a time of starting up the compressor, the controller, controls regardless of a temperature of refrigerant discharged from the compressor, the flow rate control device so as to supply refrigerant liquid to the compression chamber via the injection circuit and the injection flow passage until an operating capacity of the compressor reaches a preset operating capacity or until a preset time elapses after starting up the compressor.

Abstract: A screw compressor has a slide valve movement mechanism having a cylinder provided in a casing body, a piston partitioning an interior of the cylinder into a first chamber and a second chamber, and a communication flow passage through which the second chamber communicates with a low-pressure space. The cylinder is provided with a first inflow hole, a second inflow hole, and a third inflow hole, the first chamber communicating with a high-pressure space through the first inflow hole, the second chamber communicating with the low-pressure space through the second inflow hole and the communication flow passage, the second chamber communicating with the high-pressure space through the third inflow hole. The third inflow hole is located at a position at which the third inflow hole is closed by the piston when the piston lies at a stop position at which the piston moves toward the second chamber and stops.

Abstract: A freezing device including a compressor that compresses sucked refrigerant using a compression mechanism and discharges compressed refrigerant includes a compressor, an inverter, and a controller. The compressor includes a motor, a low pressure unit, a compression space, a high pressure unit, a communication flow path, and a flow control valve. The inverter drives or stops the motor. The controller controls the inverter and the flow control valve. The controller performs, in stop control in which an operation of the compressor is stopped, braking control in which driving of the compression mechanism is prevented or suppressed, and pressure equalization control in which pressure in the high pressure unit is equalized with pressure in the low pressure unit.

Abstract: Provided are a polycarbonate having an appropriate refractive index and an appropriate Abbe number, and comprehensively excelling in heat resistance, total light transmittance, and hue, and a molded article thereof. The polycarbonate includes a constituent unit represented by Formula [I] and a constituent unit having a hydrocarbon group containing a cyclic structure. In Formula [I], R1 and R2 each independently denote a hydrocarbon group, and each R3 independently denotes a hydrogen atom, a heteroatom-containing group, a halogen atom-containing group, a linear alkyl group having from 1 to 6 carbon atoms, a branched alkyl group having from 3 to 6 carbon atoms, or a group including an aryl group and having from 6 to 12 carbon atoms.

Abstract: A thermoplastic resin composition that cuts visible light and has infrared light transmittance. A thermoplastic resin composition including a thermoplastic resin and a coloring material, wherein the refractive index at a wavelength of 894 nm is 1.60 or greater, and when the thickness of the thermoplastic resin composition is 1 mm, the maximum value of the transmittance of wavelengths of 380 nm-630 nm is greater than 0% and less than or equal to 1.00%, and the average transmittance of wavelengths of 840 nm-940 nm is greater than or equal to 80%.

Abstract: A screw compressor includes an internal-volume-ratio variable mechanism including a variable Vi valve configured to make a Vi value being an internal volume ratio variable. The screw compressor controls a position of the variable Vi valve in two stages. The position of the variable Vi valve when the Vi value is set to be large is set to attain a Vi value with which a compressor efficiency during operation under a predetermined high-load condition or a predetermined high-compression-ratio condition is equal to or higher than a set efficiency set in advance.

Abstract: Provided is an optical lens formed by integrally molding a lens part that is an optically effective portion and has a light incidence/emission surface, and a lens edge part that is an optically ineffective portion and has a surface thereof except the light incidence/emission surface. The lens edge part includes a non-transparent region in part or all thereof, the lens part and the lens edge part include a thermoplastic resin, and the non-transparent region in the lens edge part contains a total of 0.1-5 mass % of one or more of a black dye and a black pigment.

Abstract: Provided is an optical resin composition for lenses that contains a resin having a structural unit represented by formula (1), and a binaphthalene compound and/or a binaphthalene compound oligomer having a structural unit represented by formula (2). A, p, K1, K2, Z, and q in formula (1) are as described in the present specification. R1-R10, a, and b in formula (2) are as described in the present specification.

Abstract: Provided are a polycarbonate having an appropriate refractive index and an appropriate Abbe number, and comprehensively excelling in heat resistance, total light transmittance, and hue, and a molded article thereof. The polycarbonate includes a constituent unit represented by Formula [I] and a constituent unit having a hydrocarbon group containing a cyclic structure. In Formula [I], R1 and R2 each independently denote a hydrocarbon group, and each R3 independently denotes a hydrogen atom, a heteroatom-containing group, a halogen atom-containing group, a linear alkyl group having from 1 to 6 carbon atoms, a branched alkyl group having from 3 to 6 carbon atoms, or a group including an aryl group and having from 6 to 12 carbon atoms.

Abstract: A method for producing a hydrofluoroolefin is provided. The formation of by-products of an over-reduced product having hydrogen added to a material chlorofluoroolefin and an over-reduced product having not only chlorine atoms but also fluorine atoms in the chlorofluoroolefin replaced with hydrogen atoms is suppressed in the method. The method includes reacting a specific chlorofluoroolefin with hydrogen in the presence of a catalyst supported on a carrier to obtain the hydrofluoroolefin. The catalyst is a catalyst composed of an alloy containing at least one platinum group element of palladium and platinum, and at least one second element of copper, gold, lithium, potassium, silver, zinc, tin, lead, and bismuth.

Abstract: A heat exchanger includes: a stack formed by stacking a plurality of tubes through which gas flow; a tubular inner tank in which the stack is housed; and a tubular outer tank that is mounted on the outside of the inner tank so as to define an inner space between the outer tank and an outer peripheral surface of the inner tank. Each of both end portions of the tubes has a thickness greater than each of middle portions of the tubes. The both end portions of the tubes adjacent to each other in the stack are joined together so as to form a clearance between the middle portions of the adjacent tubes in the stack. Outer peripheries of both end portions of the stack are joined to an inner peripheral surface of the inner tank. An introduction hole for introducing a cooling medium is formed in the outer tank.

Abstract: A heat exchanger includes: a stack formed by stacking a plurality of tubes through which gas flow; a tubular inner tank in which the stack is housed; and a tubular outer tank that is mounted on the outside of the inner tank so as to define an inner space between the outer tank and an outer peripheral surface of the inner tank. Each of both end portions of the tubes has a thickness greater than each of middle portions of the tubes. The both end portions of the tubes adjacent to each other in the stack are joined together so as to form a clearance between the middle portions of the adjacent tubes in the stack. Outer peripheries of both end portions of the stack are joined to an inner peripheral surface of the inner tank. An introduction hole for introducing a cooling medium is formed in the outer tank.

Abstract: A method for producing a hydrofluoroolefin is provided. The formation of by-products of an over-reduced product having hydrogen added to a material chlorofluoroolefin and an over-reduced product having not only chlorine atoms but also fluorine atoms in the chlorofluoroolefin replaced with hydrogen atoms is suppressed in the method. The method includes reacting a specific chlorofluoroolefin with hydrogen in the presence of a catalyst supported on a carrier to obtain the hydrofluoroolefin. The catalyst is a catalyst composed of an alloy containing at least one platinum group element of palladium and platinum, and at least one second element of copper, gold, lithium, potassium, silver, zinc, tin, lead, and bismuth.

Abstract: A method for producing a hydrofluoroolefin is provided. The formation of by-products of an over-reduced product having hydrogen added to a material chlorofluoroolefin and an over-reduced product having not only chlorine atoms but also fluorine atoms in the chlorofluoroolefin replaced with hydrogen atoms is suppressed in the method. The method includes reacting a specific chlorofluoroolefin with hydrogen in the presence of a catalyst supported on a carrier to obtain the hydrofluoroolefin. The catalyst is a catalyst composed of an alloy containing at least one platinum group element of palladium and platinum, and at least one second element of manganese, copper, aluminum, gold, lithium, sodium, potassium, magnesium, silver, zinc, cadmium, indium, silicon, germanium, tin, lead, arsenic, antimony, and bismuth.

Abstract: A hydrofluoroolefin is produced by reacting a chlorofluoroolefin with hydrogen in the presence of a platinum group metal catalyst supported on a carbon carrier to obtain a hydrofluoroolefin. The chlorofluoroolefin is represented by formula (1): CZX?CClY, where X is F or Cl, Y is F, Cl or H, and Z is F or CF3. The hydrofluoroolefin is represented by formula (2): CZX? ?CHY?, where X? is F when X is F, or X? is H when X is Cl, Y? is F when Y is F, or Y? is H when Y is Cl or H, and Z is the same as Z in the formula (1). The carbon carrier has acidic functional groups, and the total acidic functional group amount in the carbon carrier is at most 50 ?mol/g.