Abstract: An HVAC system is provided. Embodiments of the present disclosure generally relate to an HVAC system in which multiple indoor units are coupled to central outdoor unit, where at least one of the indoor units is configured to provide conditioned air through ductwork and at least one indoor unit is configured to provide conditioned air without ductwork. Moreover, a gas furnace can be provided in the system, for harsher environments that benefit from more robust heating. Additional systems, devices, and methods are also disclosed.

Abstract: Efficiency in refrigerant charging work is addressed when a refrigerant recovered from the first heat source unit is to be charged to a second heat source unit. In a refrigerant charging method in which a first heat source unit of an already installed refrigeration cycle apparatus in which a refrigeration cycle is to be performed by a refrigerant that circulates is replaced with a second heat source unit, transferring the refrigerant from the first heat source unit to the second heat source unit is included. In addition, the method includes measuring the weight of the refrigerant that is transferred from the first heat source unit to the second heat source unit.

Abstract: An air-conditioning system includes a refrigerant circuit configured to perform a refrigeration cycle. The refrigerant circuit connects a compressor, a utilization-side heat exchanger that performs air conditioning of an indoor space, and a thermal storage heat exchanger. The air-conditioning system executes a first operation in accordance with a reduction command to reduce commercial power consumption in a whole of the air-conditioning system. The first operation allows the utilization-side heat exchanger to perform air conditioning using the thermal storage heat exchanger as a heat source. The air-conditioning system includes a power reduction section configured to perform a first control in synchronization with timing of a start of the first operation. The first control makes the commercial power consumption in the whole of the air-conditioning system equal to or lower than a first value.

Abstract: A heat source unit for a heat pump having a refrigerant circuit, the heat source unit having: an outer casing including a bottom plate; and a compressor assembly accommodated in the outer casing, the compressor assembly including a compressor of the refrigerant circuit of the heat pump including a compressor housing, a support plate supporting the compressor, the support plate being mounted via dampers to the bottom plate, and a compressor casing enclosing the compressor and the compressor housing. A damping mechanism is arranged between the compressor and the support plate, and the compressor casing is fixed to the support plate out of contact with the compressor housing.

Abstract: A method of releasing an output-suppressed control state in an air conditioning system that includes a control device to control one or more air conditioners, and a management device to be connected to the control device via a network to transmit, to the control device, a command to control output suppression of an air conditioner to cause the air conditioner to be in the output-suppressed control state, includes confirming whether communication between the control device and the management device is disconnected; and if the communication between the control device and the management device is not disconnected, prohibiting transmission of a command to release the output-suppressed control state to the control device without intervention of the management device, and if the communication is disconnected, allowing transmission of the command to release the output-suppressed control state to the control device without intervention of the management device.

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: An object of the present disclosure is to provide a novel low-GWP mixed refrigerant. To achieve the object, provided is a composition comprising a refrigerant, the refrigerant comprising 2,3,3,3-tetrafluoro-1-propene(R1234yf) and/or 1,3,3,3-tetrafluoropropene (R1234ze), trans-1,2-difluoroethylene (HFO-1132(E)), and CO2, wherein the content of HFO-1132(E) is 30 mass % or less, and the content of CO2 is 10 mass % or less based on the entire refrigerant.

Abstract: There is provided a method for producing a fluoropolymer, the method including polymerizing a fluoromonomer in an aqueous medium to obtain a polymerization dispersion containing the fluoropolymer, and bringing the fluoropolymer in the polymerization dispersion into contact with an alcohol having 3 to 5 carbon atoms to coagulate the fluoropolymer to thereby obtain the fluoropolymer.

Abstract: A method for producing low-molecular-weight polytetrafluoroethylene which includes: (1) irradiating high-molecular-weight polytetrafluoroethylene with radiation to a dose of 250 kGy or higher substantially in the absence of oxygen to provide low-molecular-weight polytetrafluoroethylene having a melt viscosity at 380° C. of 1.0×102 to 7.0×105 Pa·s. Also disclosed is a powder containing the low-molecular-weight polytetrafluoroethylene, the powder being substantially free from any of perfluorooctanoic acid and salts thereof.

Abstract: A member to be compressed for an electrochemical device obtained by crosslinking a crosslinkable composition containing a fluorine-containing elastomer containing a unit based on at least one crosslinkable group-containing monomer selected from the group consisting of a crosslinkable group-containing monomer (1) represented by the general formula (1): CX12?CF—Rf1—X2 wherein each X1 independently represents H or F, and Rf1 represents a fluorinated alkylene group or a fluorinated oxyalkylene group, and X2 represents I or Br; and a crosslinkable group-containing monomer (2) represented by the general formula (2): CX32?CX3—Z1—CX3?CX32 wherein each X3 independently represents H, F, an alkyl group or a fluorinated alkyl group, and Z1 represents an alkylene group, a fluorinated alkylene group, a cycloalkylene group, a fluorinated cycloalkylene group, an oxyalkylene group or a fluorinated oxyalkylene group.

Abstract: A control load is reduced in a fan unit capable of controlling air flow volume. The rotation speed of a fan can be changed. An air flow volume detector detects air flow volume of the fan or equivalent air flow volume that is a physical quantity corresponding to the air flow volume of the fan. A unit casing houses, therein, the fan and the air flow volume detector. A fan controller, which is a controller, controls the rotation speed of the fan. The fan controller controls the rotation speed of the fan on the basis of a command value of the air flow volume of the fan given from outside the unit and a detected value of the air flow volume or the equivalent air flow volume detected by the air flow volume detector.

Abstract: Hydrocarbon-type refrigerants tend to dissolve in refrigerating machine oils, which may result in a decrease in the viscosity of the refrigerating machine oils and cause excessive wear of the sliding portions inside the compressors. An air conditioning apparatus includes a refrigerant circuit in which a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are sequentially connected and a refrigerant is circulated. The compressor includes a sliding portion including a first bearing metal or an Oldham ring. At least one of two members slidable with each other in the sliding portion is formed of aluminum or aluminum alloy. The refrigerant circulating through the refrigerant circuit is a hydrocarbon-type refrigerant. A refrigerating machine oil used in the compressor has a refrigerant solubility of 30% or less at a pressure of 1.9 MPa and at a temperature of 60° C.

Abstract: A cascade unit is a cascade unit of a refrigeration system including a first circuit, a second circuit, and a cascade heat exchanger. The first circuit includes a first connecting portion that connects a first pipe and a second pipe extending from the cascade heat exchanger, of the first pipe and the second pipe connecting a first heat exchanger and the cascade heat exchanger), to the first pipe and the second pipe extending from the first heat exchanger inside or outside a cascade casing. The second circuit includes a second connecting portion that connects a liquid pipe and gas pipes extending from the cascade heat exchanger, among the liquid pipe and the gas pipes connecting second heat exchangers and the cascade heat exchanger, to the liquid pipe and the gas pipes extending from the second heat exchangers inside or outside the cascade casing.

Abstract: Provided an area-specific environment management system, which manages an environment in an individual one of a plurality of areas, the system including: a biological information sensor that acquires biological information about at least one of an individual and a group who belongs to an individual one of the areas; an environmental information sensor that acquires environmental information about an individual one of the areas; an arousal level estimation section that estimates an arousal level with respect to the biological information by using an arousal level estimation model; and an environment provision section that provides an environment to an individual one of the areas based on the arousal level and the environmental information, wherein the arousal level includes, as a state to which the arousal level belongs, a state from sleepy until awakened; a wakeful state; and an excessively wakeful state, and wherein the environment provision section includes an individual control mode corresponding to a stat

Abstract: An air conditioning apparatus with a refrigerant circuit includes a connecting portion to which a first electric wire and a second electric wire are connected. The first and second electric wires are connected to corresponding first and second devices of a plurality of safety devices. The plurality of safety devices includes at least two types of a refrigerant detector, an alarm device, an isolation valve, and a ventilation device. A circuit configuration portion forms an interlock circuit with the first electric wire and the second electric wire connected to the connecting portion. A first member enables formation of a first circuit including at least part of the circuit configuration portion and not including both the first electric wire and the second electric wire. A controller prohibits an operation of the air conditioning apparatus when no current flows through either the interlock circuit or the first circuit.

Abstract: The present disclosure provides a production method for an amide group-containing monomer. With the present disclosure, an amide group-containing monomer in which the amount of impurities is low is efficiently produced, the production method including a transesterification reaction step for obtaining an amide group-containing monomer represented by a formula CH2?C(—R11)C(?O)O—Y1—NHC(?O)—R12 (in the formula, R11 is a hydrogen atom, a monovalent organic group, or a halogen atom, Y1 is a 2-4 valent hydrocarbon group having 1-6 carbon atoms, and R12 is a monovalent hydrocarbon group having 6-40 carbon atoms) from an amide group-containing alcohol represented by a formula HO—Y1—NHC(?O)—R12 (in the formula, Y1 is a 2-4 valent hydrocarbon group having 1-6 carbon atoms and R12 is a monovalent hydrocarbon group having 6-40 carbon atoms), wherein the total amount of Na, K, and Li present as impurities of the amide group-containing alcohol is equal to or less than 300 ppm.

Abstract: A method for producing a fluoromethyl derivative represented by formula (1), the method including step A of reacting an alkene compound represented by formula (2) with a fluorine source represented by formula MFn, in the presence of a hypervalent-iodine aromatic compound (1a), or in the presence of an aromatic iodine compound (1b) and an oxidant (A) to fluorinate the alkene compound.

Abstract: A composition including (i) an asymmetric chain carbonate represented by the formula R1OCOOR2; and (ii) water, where, in the formula, R1 is an organic group, and R2 is an organic group different from R1; where the composition includes the water in an amount of 100 ppm or less; and where the asymmetric chain carbonate is at least one of CF3OCOOCH3, CF3CH2OCOOCH3, CF3CF2OCOOCH3, CF3CF2CF2OCOOCH3, CF3CF(CF3)OCOOCH3, CF3CH(CF3)OCOOCH3, CF3CF(CH3)OCOOCH3, CF3CH(CH3)OCOOCH3, CF3OCOOCH2CH3, CF3CH2OCOOCH2CH3, CF3CF(CF3)OCOOCH2CH3, CF3CH(CF3)OCOOCH2CH3, CF3CF(CH3)OCOOCH2CH3, CF3CH(CH3)OCOOCH2CH3, CH3OCOOCFHCH3, and CH3CH2OCOOC

Abstract: The present disclosure provides a composition comprising a refrigerant characterized by having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A, and having a sufficiently low GWP. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein HFO-1132 (E) is present in an amount of 35.0 to 65.0 mass %, and HFO-1234yf is present in an amount of 65.0 to 35.0 mass %, based on the total mass of HFO-1132 (E) and HFO-1234yf, and wherein the refrigerant is for use in operating a refrigeration cycle in which the evaporation temperature is ?75 to ?5° C.

Abstract: A cascade unit and a refrigeration cycle apparatus are capable of cooling an electric component. A cascade unit of a refrigeration cycle apparatus includes a primary-side refrigerant circuit that includes a primary-side heat exchanger and through which a primary-side refrigerant flows, a secondary-side refrigerant circuit that includes a secondary-side compressor and a utilization-side heat exchanger and through which a secondary-side refrigerant flows, and a cascade heat exchanger that exchanges heat between the primary-side refrigerant and the secondary-side refrigerant, the cascade unit including the secondary-side compressor, the cascade heat exchanger, a first electric component that drives the secondary-side compressor, a first cooling portion that cools the first electric component with the secondary-side refrigerant flowing through the secondary-side refrigerant circuit, a cascade casing that accommodates the secondary-side compressor, the first electric component, and the first cooling portion.