Daikin Industries

A management system (100) targets a refrigeration cycle apparatus (1) having an outdoor unit (10) and a cooling unit (60). The management system (100) has a processor (111) and a storage (116). The processor (111) is configured to acquire a physical quantity relating to a refrigerant in a refrigerant circuit at an acquisition time and calculate an acquisition-time capacity of the outdoor unit (10) based on the physical quantity acquired. The storage (116) is configured to store operating information that is based on an acquisition-time outdoor air temperature and the acquisition-time capacity.

An object of the present disclosure is to newly provide a composition containing a halogenated alkyne compound. The composition contains a halogenated alkyne compound.

An object of the present disclosure is to newly provide a method for producing hexafluoro-2-butyne. Provided is a method for producing hexafluoro-2-butyne.

An object of the present disclosure is to newly provide a composition containing a halogenated alkyne compound. The composition contains a halogenated alkyne compound.

A flow path switching valve includes a housing (31) and a valve element (60), in which first, second, and third refrigerant flow paths that communicate a valve chamber (31A) in the housing (31) with an outside of the housing (31) are formed in the housing (31), the valve element (60) includes a first passage (61) that connects the first and second refrigerant flow paths in a first orientation, connects the first and third refrigerant flow paths in a second orientation, and in which a refrigerant having a first pressure flows, and a second passage (62) that communicates with the third refrigerant flow path in the first orientation, communicates with the second refrigerant flow path in a second orientation, and in which a refrigerant having a second pressure higher than the first pressure flows, the valve chamber (31A) and the second passage (62) communicate with each other when the valve element (60) is in a first orientation or a second orientation, and the flow path switching valve includes a pressure equalizing mechanism (80) that is switchable between a mode of connecting the first passage (61) and the valve chamber (31A) and a mode of canceling the connection, and allows connection of the first passage (61) and the valve chamber (31A) when the valve element (60) is in the first orientation or the second orientation.

A branch pipe 10 includes a branch pipe main body 20 configured to include a first plate-shaped member 21 made of stainless steel having a first surface 21a and a second plate-shaped member 22 made of stainless steel having a second surface 22a, in which the branch pipe main body 20 includes a joint portion 24, a flow path 25 formed between the first surface 21a and the second surface 22a, and a first opening 26a, a second opening 26b, and a third opening 26c which are formed by the first plate-shaped member 21 and the second plate-shaped member 22 at an end in a flow direction of fluid in the flow path 25 and communicate with the first pipe 111, the second pipe 112, and the third pipe 113, respectively.

An object of the present disclosure is to newly provide an etching gas comprising hexafluoro-2-butyne. Provided is an etching gas comprising hexafluoro-2-butyne.

A refrigerant flow path unit (40) includes a flow path portion (32) including resin and having a refrigerant flow path (51b, 52b, 53b, 56b, 31A) through which a refrigerant flows, and a casing (33) that includes metal and accommodates the flow path portion (32), in which the flow path portion (32) includes a first flow path member (32A) having a part of the refrigerant flow path (51b, 52b, 53b, 56b, 31A), a second flow path member (32B) that has another part of the refrigerant flow path (51b, 52b, 53b, 56b, 31A), and a joint portion (32D) that joins the first flow path member (32A) and the second flow path member (32B).

There is provided a use as a refrigerant in a refrigeration cycle apparatus capable of suppressing decomposition of the refrigerant. In a use as a refrigerant in a refrigeration cycle apparatus (1), the refrigeration cycle apparatus having a refrigerant circuit (10) including a compressor (11), the compressor (11) including a compression element (21) that compresses the refrigerant, and an oil reservoir (37) that stores a refrigerating machine oil, the pressure of air inside the refrigerant circuit (10) being 667 Pa or less, the refrigerating machine oil containing 3.0 wt% or more and 5.0 wt% or less of an acid scavenger, the temperature of the refrigerating machine oil in the oil reservoir (37) being maintained at 120°C or lower, and the refrigerant being at least one of a mixed refrigerant containing 1,2-difluoroethylene and one or more types of hydrofluorocarbon, a mixed refrigerant containing 1,2-difluoroethylene and one or more types of hydrofluoroolefin, and a mixed refrigerant containing one or more types of hydrofluorocarbon and one or more types of hydrofluoroolefin.

A partitioning member (5) is arranged between a plate stack (30) and a refrigerant inlet (21). The partitioning member (5) extends along a first direction that is a stacking direction of the plate stack (30). The partitioning member (5) has a plurality of communication holes (50). The plurality of communication holes (50) are open toward the plate stack (30) at positions facing the central heat exchange section (35), the first heat exchange section (36), and the second heat exchange section (37).