Abstract: Air conditioner for conditioning a space inside a building includes a heat source unit and at least one indoor unit. The heat source unit has a heat exchanger unit and a compressor unit. The heat exchanger unit includes a first heat exchanger disposed in a first casing and configured to exchange heat with a heat source. The compressor unit includes a compressor disposed in a second casing separate from the first casing, the heat exchanger unit and the compressor unit being fluidly connected via a first liquid refrigerant pipe and a first gaseous refrigerant pipe. At least one indoor unit has a second heat exchanger configured to exchange heat with the space to be conditioned and being fluidly communicated to the heat exchanger unit and/or the compressor unit via a second liquid refrigerant pipe and a second gaseous refrigerant pipe.

Abstract: A heat source unit has a capacity-variable heat source-side compressor and a heat source-side heat exchanger which functions as a radiator of refrigerant. Usage units are connected to the heat source unit and have usage-side heat exchangers, respectively, which function as evaporators of refrigerant and cool an aqueous medium. An operating capacity controller controls the capacity of the heat source-side compressor so that evaporation temperature of refrigerant of each of the usage-side heat exchangers reaches a first target evaporation temperature. A decision unit calculates second target evaporation temperatures at which outlet temperatures of the aqueous medium in the usage-side heat exchangers of the respective operating usage units reach predetermined set temperatures, and decides a minimum value of the second target evaporation temperatures as the first target evaporation temperature.

Abstract: Air conditioner for conditioning a space inside a building includes a heat source unit and at least one indoor unit. The heat source unit has a heat exchanger unit and a compressor unit. The heat exchanger unit includes a first heat exchanger disposed in a first casing and configured to exchange heat with a heat source. The compressor unit includes a compressor disposed in a second casing separate from the first casing, the heat exchanger unit and the compressor unit being fluidly connected via a first liquid refrigerant pipe and a first gaseous refrigerant pipe. At least one indoor unit has a second heat exchanger configured to exchange heat with the space to be conditioned and being fluidly communicated to the heat exchanger unit and/or the compressor unit via a second liquid refrigerant pipe and a second gaseous refrigerant pipe.

Abstract: An air conditioner for conditioning a space inside a building comprises a heat source unit and at least one indoor unit. The heat source unit has a heat exchanger unit comprising a first heat exchanger disposed in a first casing and configured to exchange heat with a heat source and a compressor unit comprising a compressor disposed in a second casing separate from the first casing. The at least one indoor unit has a second heat exchanger configured to exchange heat with the space to be conditioned and being fluidly communicated to the heat exchanger unit and/or the compressor unit. The heat exchanger unit is disposed inside the building and fluidly communicated to the outside of the building.

Abstract: Provided is a temperature-adjusting fluid supply apparatus that causes a fluid for temperature adjustment to be circulated between a heat exchanger that transfers heat supplied from a refrigerant to the fluid, and an object to be adjusted for temperature that uses the heat of the fluid, the temperature-adjusting fluid supply apparatus being able to prevent the fluid from freezing. A temperature-adjusting fluid supply apparatus is provided with a heat exchanger that transfers heat supplied from a refrigerant to a fluid for temperature adjustment, a supply tube through which the fluid flows from the heat exchanger toward an object to be adjusted for temperature, a return tube through which the fluid returning from the object to be adjusted for temperature flows, a flow rate adjustable pump, a flow sensor, a flow switch, a temperature sensor, and a control part.

Abstract: A compressor unit for an air conditioner includes a compressor disposed in a first casing, and first and second heat source heat exchanger unit ports configured to connect the compressor unit to a heat source heat exchanger of a heat source heat exchanger unit of the air conditioner, the heat source heat exchanger being disposed in a second casing separate from the first casing and being configured to exchange heat with a heat source, first and second indoor unit ports configured to connect the compressor unit to an indoor heat exchanger of at least one indoor unit of the air conditioner, a first refrigerant piping fluidly connecting the first heat source heat exchanger unit port and the first indoor unit port, and a sub-cooling heat exchanger disposed inside the first casing and fluidly connected to the first refrigerant piping for heat transfer with the refrigerant to be flown through the first refrigerant piping.

Abstract: A set for assembling a heat source unit of an air conditioner at the site of the air conditioner, includes a heat source heat exchanger module having a first casing, a heat source heat exchanger and a compressor module port fluidly communicated with the heat source heat exchanger, a compressor module having a second casing separate from the first casing, a compressor and a heat source heat exchanger module port fluidly communicated with the compressor, wherein the heat source heat exchanger module and the compressor module are fluidly communicatable via the compressor module port and the heat source heat exchanger port, a main board comprising a control logic of the air conditioner and a first electric connector, wherein at least one of heat source heat exchanger and compressor modules has a circuit board comprising a second electric connector, the circuit board of such a module being configured for data communication with the main board upon electrical connection of the circuit board and the main board via t

Abstract: A coil support member is attached to a coil inside a water storage vessel and includes multiple openings, insertion portions and a non-insertion portion. The openings are arranged in a lengthwise direction, and together with surrounding sites prevent contact between mutually adjacent loops of the tube of the coil and suppress contact between an inner surface of the water storage vessel and an outer surface of the coil. The insertion portions are formed between the openings and are inserted into an intra-coil space located radially inward of the outer surface of the coil. The non-insertion portion is positioned in an extra-coil space located radially outward of the outer surface of the coil. The insertion portions have insertion body portions preventing contact between mutually adjacent loops of the tube, and engagement portions contacting the tube from the intra-coil space and maintaining an inserted state of the insertion body portions.

Abstract: A heat pump system includes a heat source unit, a usage-side unit, and a usage-side controller. The heat source unit has a heat source-side compressor for compressing a heat source-side refrigerant, and a heat source-side heat exchanger capable of functioning as an evaporator of the heat source-side refrigerant. The usage-side unit is connected to the heat source unit and has a capacity-variable-type usage-side compressor for compressing a usage-side refrigerant, a usage-side heat exchanger capable of functioning as a radiator of the heat source-side refrigerant and functioning as an evaporator of the usage-side refrigerant, and a refrigerant-water heat exchanger capable of functioning as a radiator of the usage-side refrigerant and heating an aqueous medium. The usage-side controller performs usage-side capacity variation control for incrementally varying the operating capacity of the usage-side compressor during a usual operation.

Abstract: A refrigerant circuit includes a compressor, a heat source-side heat exchanger, and a usage-side heat exchanger capable of heating an aqueous medium. An aqueous medium circuit includes a circulation pump and the usage-side heat exchanger, and is connected to aqueous medium devices. An auxiliary heat source is provided at an outlet side of the usage-side heat exchanger in the aqueous medium circuit to further heat the aqueous medium. A heating capability computation unit computes a heating capability of the aqueous medium devices based on an operating state quantity of constituent devices or refrigerant flowing through the refrigerant circuit. A circulation flow rate computation unit computes a circulation flow rate of the aqueous medium based on an outlet/inlet temperature difference and the heating capability. A prediction unit predicts an outlet temperature of the aqueous medium in the auxiliary heat source based on the circulation flow rate and heat source capability information.

Abstract: An air conditioning apparatus has a refrigerant circuit made up of plural indoor units connected to an outdoor unit, and the air conditioning apparatus has a capacity controlling part and a target refrigerant temperature mode setting part. The capacity controlling part controls the air conditioning capacity of the outdoor unit in such a way that the evaporation temperature of refrigerant in the refrigerant circuit becomes a target evaporation temperature, or in such a way that the condensation temperature of the refrigerant becomes a target condensation temperature. The target refrigerant temperature mode setting part is configured to seta target refrigerant temperature mode to either a target refrigerant temperature changing mode or a target refrigerant temperature fixing mode.

Abstract: A heat pump system includes a heat-source-side refrigerant circuit and a controller. The heat-source-side refrigerant circuit has a plurality of usage units having usage-side heat exchangers. The plurality of usage units are connected to a heat source unit having a plurality of heat-source-side heat exchangers and a heat-source-side compressor configured to compress a heat-source-side refrigerant. The controller causes the plurality of heat-source-side heat exchangers to function as evaporators and radiators of heat-source-side refrigerant to perform an air-cooling operation and an air-warming operation using an aqueous medium. The heat pump system operates so that the heat-source-side condensing temperature is below 40° C. in the case that an outside air temperature is 25° C. or lower and the cooling and heating operations coexist.

Abstract: A heating system includes a flow circuit carrying working fluid at a set flow temperature to a heat emitting section, an electricity driven heat pump having a first heat exchanger, and a fuel fired boiler having a second heat exchanger. The first and second heat exchangers arc connected to the flow circuit to heat the working fluid in succession. A coefficient of performance (COPSet Flow Temperature) of the heat pump and a break even coefficient of performance (BECOP) are determined, and the COPSet Flow Temperature and BECOP compared. The BECOP is electricity price/fuel price*boiler thermal efficiency. If the COPSet Flow temperature is smaller than the BECOP in a first hybrid mode, an intermediate flow temperature is determined, the heat pump is operated to heat the working fluid to the intermediate flow temperature and the boiler is operated to heat the working fluid to the set flow temperature.

Abstract: A heat pump system includes a refrigerant circuit and a controller. The refrigerant circuit has usage units connected to a heat source unit. The usage units have first usage-side heat exchangers and second usage-side heat exchangers. The heat source unit has heat-source-side heat exchanger and a compressor. The controller causes the heat-source-side heat exchanger to function as an evaporator or as a radiator in accordance with an overall heat load of the usage units when the heating operation or the cooling operation has been set for each of the usage units. The aqueous medium is heated by heat radiation of the refrigerant in the first usage-side heat exchangers in the heating operating, and is cooled by evaporation of the heat-source-side refrigerant in the second usage-side heat exchangers in the cooling operation.

Abstract: A heat pump system includes: a heat-source-side refrigerant circuit having a heat-source-side compressor, a first usage-side heat exchanger operable as a radiator of heat-source-side refrigerant, and a heat-source-side heat exchanger operable as an evaporator of heat-source-side refrigerant; and a usage-side refrigerant circuit having a usage-side compressor arranged to compress usage-side refrigerant with a pressure of the usage-side refrigerant corresponding to a saturated gas temperature of 65° C. that is 2.8 MPa or less at gauge pressure, a refrigerant-water heat exchanger operable as a radiator of usage-side refrigerant to heat an aqueous medium, and a first usage-side heat exchanger operable as an evaporator of usage-side refrigerant by the radiation of heat-source-side refrigerant. The weight of usage-side refrigerant enclosed in the usage-side refrigerant circuit is one to three times the weight of refrigeration machine oil enclosed to lubricate the usage-side compressor.

Abstract: A heat pump system includes: a heat-source-side refrigerant circuit having a heat-source-side compressor, a first usage-side heat exchanger operable as a radiator of heat-source-side refrigerant, and a heat-source-side heat exchanger operable as a radiator of heat-source-side refrigerant; and a usage-side refrigerant circuit having a usage-side compressor, a refrigerant/water heat exchanger operable as a radiator of usage-side refrigerant to heat an aqueous medium, and the first usage-side heat exchanger operable as an evaporator of usage-side refrigerant by radiation of heat-source-side refrigerant.

Abstract: A heat pump system includes a refrigerant circuit and a controller. In a heating operation, the usage-side expansion valve is controlled so that a degree of subcooling of outlet refrigerant of the usage-side heat exchanger is equal to a predetermined target degree of subcooling. In a refrigerant recovery control, the heat-source-side expansion valve is controlled so that a degree of superheat of outlet refrigerant of the heat-source-side heat exchanger is equal to a predetermined target degree of superheat, the predetermined target degree of superheat is changed so that the outlet refrigerant of the heat-source-side heat exchanger is wet when the usage-side expansion valve is opened greater than a predetermined opening degree at a start of refrigerant recovery, and change in the predetermined target degree of superheat is cancelled when the usage-side expansion valve is closed smaller than a predetermined opening degree at an end of refrigerant recovery.

Abstract: A heating system includes a flow circuit carrying working fluid at a set flow temperature to a heat emitting section, an electricity driven heat pump having a first heat exchanger, and a fuel fired boiler having a second heat exchanger. The first and second heat exchangers arc connected to the flow circuit to heat the working fluid in succession. A coefficient of performance (COPSet Flow Temperature) of the heat pump and a break even coefficient of performance (BECOP) are determined, and the COPSet Flow Temperature and BECOP compared. The BECOP is electricity price/fuel price*boiler thermal efficiency. If the COPSet Flow temperature is smaller than the BECOP in a first hybrid mode, an intermediate flow temperature is determined, the heat pump is operated to heat the working fluid to the intermediate flow temperature and the boiler is operated to heat the working fluid to the set flow temperature.