Abstract: Provided is a refrigerant cycle apparatus capable of suppressing detects caused by iodine even when a refrigerant containing iodine is used. An air conditioner includes a refrigerant circuit through which a refrigerant containing iodine circulates. The refrigerant circuit includes a component that is in contact with a refrigerant containing iodine, the component being made of metal other than aluminum or an aluminum alloy, or having a content of aluminum which is equal to or less than a ratio at which corrosion of aluminum occurs by iodine. The component is at least one of a component of a compressor, a component of a heat-source-side heat exchanger or a utilization-side heat exchanger, a component of an expansion valve, a drier, and a connection pipe.
Abstract: A tube for transferring a liquid having a refractive index of 1.35 to 1.41. The tube contains a fluoropolymer, and the fluoropolymer has a melt flow rate of 3 to 150 g/10 min, and a light transmittance at a wavelength of 300 nm of 85% or higher. Also disclosed is a container including the tube, and a fragrance product including a transparent container accommodating the liquid and the tube for sucking up the liquid.
Abstract: A method for producing a composition including a step A of performing ultrafiltration, microfiltration, dialysis membrane treatment, or a combination thereof on a composition containing water and a fluoropolymer. The fluoropolymer is a polymer having a structural unit M3 derived from a monomer represented by general formula (1): CX2?CY(—CZ2—O—Rf-A)??(1) where X is the same or different and is —H or —F; Y is —H, —F, an alkyl group, or a fluorine-containing alkyl group; Z is the same or different and is —H, —F, an alkyl group, or a fluoroalkyl group; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond; and A is —COOM, —SO3M, —OSO3M, or —C(CF3)2OM, wherein M is as defined herein; provided that at least one of X, Y, and Z includes a fluorine atom.
Abstract: A fluorine-containing copolymer represented by formula (1) or (2): where RF1, Xa, Xb, R4, n, Ra and RF2 are as defined herein. Also disclosed is a surface-treating agent containing the fluorine-containing copolymer, a curable composition containing the fluorine-containing copolymer or surface-treating agent and a matrix forming composition, a film formed from the surface-treating agent or curable composition, and an article including a substrate and a layer formed on a surface of the substrate from the surface-treating agent or curable composition.
March 3, 2022
June 23, 2022
Daikin Industries, Ltd.
Shouta Shibutani, Shingo Okuno, Masatoshi Nose
Abstract: A fluorine-containing copolymer including tetrafluoroethylene units (a), ethylene units (b), and hexafluoropropylene units (c), a content of the tetrafluoroethylene units (a) in the total monomer units being 36.0 to 45.0% by mole; a content of the hexafluoropropylene units (c) in the total monomer units being 6 to 21% by mole; a mole ratio of the tetrafluoroethylene units (a) to the sum of the tetrafluoroethylene units (a) and the ethylene units (b), (a)/((a)+(b)), being 0.40 to 0.54; and a melt flow rate measured under the conditions of 230° C. and a load of 5 kg being 12 to 100 g/10 minutes.
Abstract: A wafer cup including a copolymer containing a tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit. A water contact angle of at least a part of an inner surface of the wafer cup is 80 degrees or less.
Abstract: A member to be compressed for an electrochemical device, including a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, the copolymer having a content of the fluoroalkyl vinyl ether unit based on all the monomer units of the copolymer of 4.3% by mass or more and less than 5.5% by mass, and having a melt flow rate of 10 to 23 g/10 min.
Abstract: An object of the present invention is to provide a mixed refrigerant having three types of performance; i.e., a refrigerating capacity (also referred to as cooling capacity) and a coefficient of performance (COP) that are equivalent to those of R410A, and a sufficiently low GWP. Provided as a means for achieving the object is a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoro-1-propene (R1234yf).
Abstract: A centrifugal compressor is configured to be used for compressing a low global warming potential (GWP) refrigerant. The centrifugal compressor comprises a casing, an impeller, and a motor for rotating the impeller. The impeller is equipped with blades having a fully nonlinear shape in a quasi-orthogonal cross-sectional view. A hub-side blade angle delta of each of the blades from a hub portion of the first impeller to a mid-span position of the blade varies along a streamwise direction such that the hub-side blade angle delta is largest at a position closer to a leading edge of the first blade than to a trailing edge of the first blade. The casing is configured such that the low global warming potential (GWP) refrigerant enters the impeller from the inlet portion along an axial direction of the impeller and exits the impeller to the outlet portion in a radial direction of the impeller.
July 10, 2019
Date of Patent:
June 21, 2022
Daikin Industries, Ltd.
Kenichi Masaki, Midori Drake, Jason Busch
Abstract: A resin composition including polytetrafluoroethylene (A); graphite (B); talc (C); and an abrasion resistance-improving filler (D), the resin composition containing 50 to 80 parts by mass of the polytetrafluoroethylene (A), 1 to 35 parts by mass of the graphite (B), 1 to 35 parts by mass of the talc (C), 16 to 40 parts by mass of a total of the graphite (B) and the talc (C), and 2 to 10 parts by mass of the abrasion resistance-improving filler (D) relative to 100 parts by mass of a total of the polytetrafluoroethylene (A), the graphite (B), the talc (C), and the abrasion resistance-improving filler (D). Also disclosed is a molded article obtained by compression molding, extrusion molding, or injection molding the resin composition.
Abstract: A composition containing a polytetrafluoroethylene, a polymer (I) containing a polymerization unit (I) based on a monomer represented by the general formula (I), a nonionic surfactant, and an aqueous medium, wherein a content of the polytetrafluoroethylene in the composition is 10% by mass or more based on the composition, and a content of the nonionic surfactant in the composition is 1.0% by mass or more based on the polytetrafluoroethylene, CX1X3?CX2R(—VZ1Z2-A0)m ??(I) wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.
Abstract: An air conditioning and ventilating system S including: an air conditioning device A including a heat exchanger 22 configured to generate conditioned air by heat exchange with a refrigerant, and configured to send the conditioned air to an air conditioned space R; a ventilation device 30 configured to ventilate the air conditioned space R; a refrigerant sensor 24 configured to detect concentration of the refrigerant in the air conditioned space R; and a control unit 40 configured to control operations of the air conditioning device A and the ventilation device 30. On determination that the refrigerant concentration acquired from the refrigerant sensor 24 exceeds a first predetermined value, the control unit 40 sets an operation of a compressor 13 of the air conditioning device A to a stop state and sets the ventilation device 30 to an operating state.
Abstract: A refrigeration apparatus includes a heat source-side unit and a utilization-side unit that are connected to each other, and performs a refrigeration cycle in which a high pressure of a refrigerant reaches or exceeds a critical pressure. The refrigeration apparatus also includes a control unit configured to perform a first action of returning the refrigerant to the heat source-side unit when a stop condition of the utilization-side unit is satisfied, and a second action of prohibiting the first action when a pressure at the heat source-side unit is equal to or more than the critical pressure of the refrigerant. This configuration suppresses damage to a refrigerant storage reservoir and the like in returning the refrigerant to the heat source-side unit.
Abstract: An air conditioning system includes an air conditioning apparatus, and a controller. The air conditioning apparatus performs air conditioning of an air-conditioning target space. The controller is connectable to a plurality of types of thermostats. The controller performs communication with the thermostat connected thereto. The controller performs a performance determination process for the refrigeration cycle apparatus. The controller performs different performance determination processes according to whether a first type of thermostat is connected thereto unit or whether a second type of thermostat is connected thereto. Alternatively, the air conditioning apparatus changes a method for using information received by the controller from the thermostat according to whether being in a determination processing time over which the performance determination process is performed or in a non-determination processing time over which the performance determination process is not performed.
Abstract: An air-conditioner indoor unit is configured to be capable of changing the direction of an airflow that is blown out through a blow-out port. The air-conditioner indoor unit includes a control unit that switches between a normal mode and a wide mode. The control unit extends at least vertically a range that is to be reached by the airflow in an air-conditioning target space in the wide mode compared with the normal mode and causes the air conditioning capacity of the wide mode to be lower than the air conditioning capacity of the normal mode.
Abstract: A quality determination apparatus includes a state detector and a main processing unit. The state detector detects a state index. The state index is an index indicating a state of a target article contained in a storage space where an internal environment is controlled. The main processing unit performs a determination operation. The determination operation is an operation of determining whether a sign condition indicating a sign of degradation of the target article is met based on the state index detected by the state detector.
Abstract: A refrigerant leakage determination system includes a refrigerant circuit including a compressor, a condenser, an expansion mechanism, and an evaporator. The system performs a first determination, and a second determination. The first determination determines that refrigerant has leaked from the refrigerant circuit, by using a first state amount of refrigerant as a determination index, the first state amount including at least one of an outlet temperature of the condenser, a suction temperature of the compressor, and a discharge temperature of the compressor. The second determination determines that refrigerant has leaked from the refrigerant circuit, based on information different from the first state amount.
Abstract: A heat source-side unit (10) includes a heat source-side circuit (11). The heat source-side circuit (11) includes a compression unit (20) including a lower-stage compression element (23) and a higher-stage compression element (21), an intermediate heat exchanger (17) disposed on a refrigerant path between the lower-stage compression element (23) and the higher-stage compression element (21), and a bypass passage (23c) connected to a suction pipe (23a) and a discharge pipe (23b) each connected to the lower-stage compression element (23). At startup of the compression unit (20), a first action is performed for stopping the lower-stage compression element (23) and operating the higher-stage compression element (21). This configuration thus suppresses occurrence of liquid compression at startup of a compressor.
Abstract: Left and right edge portions of an external casing of a container refrigeration apparatus each include a column member that is continuous from the upper end to the lower end of a casing. Left and right edge portions of an internal casing each include a side plate that is continuous from the upper end to the lower end of the casing. The column members of the external casing and the associated side plates of the internal casing are fixed together, thereby increasing the strength of the casing including the external casing and the internal casing.
Abstract: A compressor unit includes a first case, a first compressor, a cascade heat exchanger, a second compressor, a first connecting port, and a second connecting port. The first compressor, the cascade heat exchanger, and a heat source heat exchanger accommodated in a second case constitute a first refrigerant cycle. The second compressor, the cascade heat exchanger, and a utilization heat exchanger accommodated in a third case constitute a second refrigerant cycle. The first connecting port is connected to the heat source heat exchanger via a first connection piping. The second connecting port is connected to the utilization heat exchanger via a second connection piping.
March 3, 2022
June 16, 2022
DAIKIN INDUSTRIES, LTD., DAIKIN EUROPE N.V.