Daikin Industries Patente

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.

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.

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.

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 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 a composition containing a halogenated alkyne compound. The composition contains a halogenated alkyne compound.

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).

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).

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 refrigeration cycle apparatus includes: a shut-off valve (26, 43) configured to shut off a flow of a refrigerant from a heat-source-side circuit (20a) to a utilization-side circuit (45) when a refrigerant leakage sensor (70) detects leakage of the refrigerant; and a controller (100) configured to execute a determination action including: a first control to close the shut-off valve (26, 43) or reduce an opening degree of the shut-off valve (26, 43) during operation of a compressor (22); and a second control to determine, after the first control, whether the shut-off valve (26, 43) is abnormal, based on a pressure or temperature of the refrigerant in a refrigerant circuit (10). The controller (100) executes the determination action in response to acquisition of a first signal for setting the utilization unit (40) to a thermo-off state.

A controller (C) obtains first information on a heating load of the indoor unit (20) and second information on a cooling load of the cooling unit (50), and outputs a control signal for changing at least one of a heating capability of the indoor unit (20) and a cooling capability of the cooling unit (50) based on the first information and the second information.

An air conditioning system (1) includes an air conditioner (2) that includes a first refrigerant circuit (23), adjusts a temperature of air taken in from an indoor space by heat exchange with a refrigerant, and supplies the air to the indoor space, a ventilator (3) that adjusts a temperature of air taken in from outdoors and supplies the air to the indoor space, and a control unit (4) that controls the air conditioner (2) and the ventilator (3) in accordance with a heat load of the indoor space that requires temperature adjustment, in which when the heat load of the indoor space to be temperature-adjusted by the first indoor unit (22A) of the air conditioner (2) is in a high-load state and the heat load of the indoor space to be temperature-adjusted by the second indoor unit (22B) is in a low-load state, the control unit (4) stops a temperature adjustment operation of the second indoor unit (22B) and performs the temperature adjustment operation by the ventilator (3).

A flow path switching valve having a small pressure loss is provided. A flow path switching valve (100) includes a body casing (120) having a first end (125a) and a second end (125b), in which a first space (V1) is formed inside, and a first port (130a), a second port (130b), and a third port (130c) are provided on an outer surface (124), and a valve body disposed inside the first space. The state of the valve body is switched between a first state in which the first port and the second port are connected and a second state in which the first port and the third port are connected. The second port and the third port are disposed at the first end of the body casing, and the first port is disposed at the second end of the body casing.

Provided is a method for producing a purified fluoroalkyne compound, wherein the method includes subjecting a water-containing fluoroalkyne compound to a dehydration process using a fluorinated adsorbent to obtain a purified fluoroalkyne compound, and the fluoroalkyne compound is a fluoroalkyne compound represented by the formula 1.

Provided is a flow path switching valve having the flow paths extending in multiple directions, the flow path switching valve preventing a valve element from being separated from a seal member. A flow path switching valve includes a valve body (40), a valve element (50), and a seal member (70). The valve body (40) wherein a valve chamber (30) is formed internally, and at least three or more ports (Pi1 to Pi3) serving as fluid inlets and outlets are provided on the wall surface forming the valve chamber (30). The valve element (50) is disposed in the valve chamber (30) and has a first passage (51) through which the fluid flows. The seal member (70) seals an interface between the valve element (50) and at least one of the ports. The seal member (70) includes a base portion (80) and an extended portion (90). The base portion (80) is disposed on the port side. The extended portion (90) is extended so as to open from the base portion (80) side toward the valve element (50), and is brought into contact with the valve element (50) while being biased toward the valve element (50) in a communication state.

An air conditioner capable of suppressing inflow of a refrigerant into a heat exchanger as necessary is provided. An air conditioner 1 includes a refrigerant circuit including a utilization heat exchanger (22) having a connection portion (22a) into which a refrigerant flows and a connection portion (22b) from which the refrigerant flows out, and a flow path switching valve (100). A flow path switching valve includes a body (120) in which a first space (V1) is formed and ports (122a to 122d) are provided on an inner wall (122), and a valve body (140) disposed in the first space and forming a first flow path (R1) through which the refrigerant flows. The port (122b) communicates with the connection portion (22a), and the port (122c) communicates with the connection portion (22b). In the valve body (140), the first flow path is switched to a state of connecting the port (122a) and the port (122b), a state of connecting the port (122a) and the port (122c), and a state (S3) of connecting the port (122b) and the port (122c), and the ports to which the first flow path is not connected in each state are connected by a second flow path (R2) formed in the first space.

An efficient refrigeration cycle apparatus that reduces a pressure loss in a flow path switching valve is achieved. An air conditioner (1) includes a flow path switching valve (100). The flow path switching valve includes a body casing (120) in which a first space V1 is formed and ports (130a to 130d) are provided on an outer surface (124), and a valve body disposed in the first space and forming a first flow path through which a refrigerant flows. The state of the valve body is switched between a first state in which the first port and the second port are connected by the first flow path and a second state in which the first port and the third port are connected by the first flow path. The refrigerant flows through the second port in a single direction, and the refrigerant flows through the third port in a single direction. The body casing has a first end (125a) and a second end (125b). The second port and the third port are disposed at the first end (125a). The first port is disposed at the second end (125b).

An indoor expansion valve (51) is an expansion valve that decompresses a refrigerant. The indoor expansion valve (51) includes a valve main body (41), a first pipe (100), and a second pipe (200). The valve main body (41) has a valve chamber (43) in which a valve body (42) is accommodated. The first pipe (100) is connected to the valve chamber (43) in a first direction that is an axial direction of the valve body (42). The second pipe (200) is connected to the valve chamber (43) in a second direction intersecting the first direction. The second pipe (200) has a wall thickness (T) at a reference position (L0) that is an end portion (200a) on the valve chamber (43) side being smaller than the wall thickness (T) at a first position (L1) away from the reference position (L0) by a first distance on a side opposite to the valve chamber (43) in the second direction.

This invention provides a method for purifying HFO-1132 to a high purity while suppressing the isomerization and loss of HFO-1132. Specifically, the present invention provides a method for purifying 1,2-difluoroethylene, which is HFO-1132, the method comprising, in this order,step 1 of bringing a composition comprising trans-1,2-difluoroethylene, which is HFO-1132(E), and water into contact with a zeolite having an average pore size of 2 to 4 Å to reduce the water content from the composition; andstep 2 of recovering a purified product containing HFO-1132(E) and a reduced content of water, and containing less than 0.1% by volume of HFO-1132(2).

An outdoor unit includes a casing, a refrigerant pipe, a refrigerant detection sensor, openings that communicate the inside and the outside of the casing, pipe connection parts, a first cover, and a second cover. The refrigerant pipe is disposed in the casing. A refrigerant flows through the refrigerant pipe. The refrigerant detection sensor is disposed in the casing. The openings that communicate the inside and the outside of the casing are formed on a side surface of the casing. The pipe connection parts connect the refrigerant pipe and a connection pipe extending from an indoor unit. The first cover includes a first portion, a second portion, and a coupling portion. The second cover covers the first cover. The coupling portion is disposed between the first portion and the second portion. The first cover covers the openings and the pipe connection parts. The first portion and the second portion of the first cover are openable and closable by relative movement via the coupling portion.

The disclosure provides a method for producing a polytetrafluoroethylene molded article, capable of improving the tensile strength of the resulting polytetrafluoroethylene molded article, regardless of whether the polytetrafluoroethylene used is a recycled product or a virgin product, without using a special infrared irradiation device and a rubber mold, and a polytetrafluoroethylene molded article. Provided is a method for producing a polytetrafluoroethylene molded article, including a rolling step of rolling polytetrafluoroethylene at 50 MPa or higher to obtain a molded article.

An object of the present disclosure is to newly provide high-purity octafluorocyclobutane. High-purity octafluorocyclobutane is provided.

Provided is an air conditioner capable of accurately detecting a refrigerant leakage. An air conditioner (100) includes a refrigerant circuit (10) and a detector (61). The refrigerant circuit includes a heat source heat exchanger (23), an expansion valve (24), and a utilization heat exchanger (51), and is filled with a refrigerant. The detector detects a refrigerant leakage in the refrigerant circuit. The detector detects the refrigerant leakage by comparing a first value (P1) corresponding to a first estimated flow rate (F1) that is an estimated flow rate (F) of the refrigerant flowing through the expansion valve in a first term (T1) with a second value (P2) corresponding to a second estimated flow rate (F2) that is an estimated flow rate of the refrigerant flowing through the expansion valve in a second term (T2) before the first term.

The indoor heat exchanger (40) includes: a heat exchanger body (B) that has a plurality of fins (41) arranged in a first direction and a heat transfer tube (42) penetrating the plurality of fins (41); and a plate structure (50) that is arranged side by side with the heat exchanger body (B) in the first direction and forms a refrigerant flow path (51) communicating with the heat transfer tube (42). The regulation mechanism (60, 80) is disposed in the indoor casing (31) to overlap the heat exchanger body (B) and the plate structure (50) when viewed in the first direction.

An electric component module 10 includes a first board 21 having a first circuit 31 including a noise generation source, a second board 22 having a second circuit 32 including a microcomputer 35 that transmits and receives a communication signal CS to and from a control circuit 41 other than the first circuit 31, the second board 22 being separated from the first board 21, and an electric wire 51 that transmits and receives a simple signal SS between the first circuit 31 and the second circuit 32.

Provided is a refrigeration cycle device for vehicle capable of effectively using different temperature regions of a heat exchanger generated by using a zeotropic refrigerant mixture. The refrigeration cycle device for vehicle has a refrigerant circuit (10) in which a zeotropic refrigerant mixture circulates. The refrigerant circuit (10) has an indoor heat exchanger (18) including a first indoor heat exchanger (16) and a second indoor heat exchanger (17). The first indoor heat exchanger (16) and the second indoor heat exchanger (17) are arranged in series with each other in the flow of the refrigerant in the refrigerant circuit (10). The first indoor heat exchanger (16) is positioned on the upstream side of the second indoor heat exchanger (17) in a direction in which the refrigerant flows when the first indoor heat exchanger (16) and the second indoor heat exchanger (17) are caused to function as evaporators of the refrigerant.

To provide a refrigerant compressor capable of suppressing a refrigerating machine oil from remaining at a slide portion while maintaining a low miscibility between an R290 refrigerant and the refrigerating machine oil. The scroll compressor includes a compression mechanism that compresses an R290 refrigerant, a drive shaft that transmits power to the compression mechanism, a slide bearing (200) that axially supports the drive bearing, a casing that houses the compression mechanism, the drive bearing, and the slide bearing, and a refrigerating machine oil stored in the casing. The refrigerating machine oil is PAG, POE, or PVE having an OH group at a terminal of a chemical structure. The slide bearing has a composite material CM including a resin-impregnated layer (220) in which a porous metal M is impregnated with a resin P including PTFE. A slide surface (222) of the slide bearing is formed of a resin-impregnated layer, and the metal is exposed at a predetermined metal exposure rate. A surface energy on a surface of the resin-impregnated layer of the composite material at the predetermined metal exposure rate is less than 40 mN/m.

In a rotary compressor, a cylinder (31, 41, 231, 241, 331) and a closing member (50, 55, 56, 250, 255, 256, 350, 356) are fixed to each other by a plurality of bolts (B) extending in an axial direction of a rotary shaft (90). The plurality of bolts (B) include: a first bolt (B1) between a suction pipe (14, 214a, 214b, 314) and a housing (33, 43) housing a blade (38, 48) as viewed in the axial direction; and a second bolt (B2) between the housing (33, 43) and an imaginary line (IL), which is symmetrical to a center line (AL) of the suction pipe (14, 214a, 214b, 314) with respect to the housing (33, 43), as viewed in the axial direction.

A rotary compressor includes a shaft extending in a first direction, a motor to drive the shaft, a first bearing including a discharge hole to discharge a compressed refrigerant, and supporting the shaft, a cylinder including a cylinder chamber formed inside the cylinder, a roller to eccentrically rotate in the cylinder chamber, and a muffler disposed so as to cover the discharge hole, wherein the motor, the muffler, the first bearing, and the cylinder are arranged in stated order along the first direction, the first bearing includes a boss which supports the shaft and protrudes toward the muffler, the muffler includes an opening through which the boss is disposed, and the first bearing or the muffler includes one or more positioning structures to determine a position of the muffler with respect to the first bearing such that clearance in the opening is formed along an entire periphery of the boss.

The rotary compressor (1) includes a drive shaft (31), a compression mechanism (30) for a refrigerant, and a casing (10). The compression mechanism (30) has a bearing (41) fixed to the casing (10) by a fixture member (44). The fixture member (44) has a first plate portion (44a) above the bearing (41), and the fixture member (44) and the compression mechanism (30) have a flow path for a fluid. The flow path includes a fluid inlet (44d) including a first plate portion (44a), a wall surface (41k) below the fluid inlet (44d), a first space (P1) between the fluid inlet (44d) and the wall surface (41k), a second space (P2) which is positioned below the fixture member (44) and shifted from the first space (P1) in a radial direction and/or a circumferential direction and through which the fluid that has collided with the wall surface (41k) flows, and a fluid outlet (41j) below the second space (P2).

The displacement volume of a compression mechanism (40) is defined as Vc [cc], the density of a refrigerant at 1.9 Mpa and 75°C as Dg [g/cm<3>], the number of revolutions of a rotary shaft (30) as N [rps], the volume of a primary space (S1) as V1 [cc], the volume of a secondary space (S2) as V2 [cc], the height of the primary space (S1) as H1 [cm], the height of the secondary space (S2) as H2 [cm], the density of refrigerating machine oil at 15°C as Do [g/cm<3>], and the solution viscosity of the refrigerating machine oil present at a level of a suction port (71a) or lower as η [mPa·S]. The rotary compressor satisfies relational expressions: N ≥ 100 [rps]; and ((8.19 × 10<-8> × Vc × Dg + 0.000327) × Vc<3.657> × N<3.126>)/(V1 × V2 × H1<1.867> × H2<1.556> × Do × η) ≤ 1.0. <img class="EMIRef" id="9bc56977-2269-4b63-9ad7-c8054ca75a0e-ia01" />

An injection flow path (61) communicating with an injection pipe (9c) is formed in a first cylinder (31, 41), a middle plate (55), and a second cylinder (31, 41). The injection flow path (61) includes: a first flow path (61a) connected to the injection pipe (9c); a second flow path (61b, 61c) branching from the first flow path (61a) and communicating with a first cylinder chamber (S1, S2); and a third flow path (61b, 61c) branching from the first flow path (61a) and communicating with the second cylinder chamber (S1, S2).

An injection mechanism (40) includes a valve chamber (50), a first flow path (42, 43) that allows an injection pipe (39) and the valve chamber (50) to communicate with each other and has an outflow port (44) facing the valve chamber (50), and a second flow path (45) that is located at one end of the valve chamber (50) in a first direction and allows the valve chamber (50) and a compression chamber (15b, 25b) to communicate with each other. An inner surface forming the valve chamber (50) includes a first surface (51) forming the outflow port (44), and an inner surface forming the first flow path (42, 43) includes a first inclined surface (47) that is continuous with the first surface (51) and is inclined toward one end in the first direction to approach the second flow path (45) as the first inclined surface (47) extends toward the first surface (51).

A refrigerant is a single component refrigerant composed of a hydrocarbon refrigerant, or a refrigerant mixture containing the hydrocarbon refrigerant. Refrigerating machine oil present at a level of a suction port (71a) or lower in an oil reservoir (35) has a solution viscosity η of 5.0 [mPa·s] or more.

The fastening member (80) includes a head (80a) and a shaft (80b) extending from the head (80a) in a second direction. The base portion (71) of the reed valve (70) has a first hole (83) through which the shaft (80b) of the fastening member (80) is inserted. The valve retainer (60) has a second hole (84) through which the shaft (80b) is inserted. The partitioning member (90) has a first space (81a) that is located outside the valve chamber (50) and houses the head (80a).

The reed valve (70) includes a base portion (71) fixed to the valve retainer (60), a tip portion (72) configured to open and close the outflow port (44), and a constricted portion (73) connecting the base portion (71) and the tip portion (72). The constricted portion (73) has a narrower width in a third direction orthogonal to the first direction and the second direction than the base portion (71). An inner side surface (53, 54) forming the valve chamber (50) is formed outside the constricted portion (73) in the third direction as viewed in the second direction. The valve retainer (60) has a side surface (61, 62) formed outside the constricted portion (73) in the third direction as viewed in the second direction.

A lower end surface of a roller (36) of a rotary compressor (1) has a horizontal surface (36a) parallel to an upper surface of a rear head (42), and an inclined surface (36b) continuous with an outer peripheral side of the horizontal surface (36a); extending to an outer peripheral surface (36o) of the roller (36); and inclined so as to be positioned higher at a radially outer side.

The first surface (51) includes a valve seat surface (58) that is in contact with the tip portion (72) of the reed valve (70) in a closed state and a groove (59) that is formed around the valve seat surface (58) and overlaps an outer edge (72a) of the tip portion (72) as viewed in a second direction. The first surface (51) has a contact surface (75) that is configured to be in contact with the movable portion (73) of the reed valve (70) in the closed state.

A first cylinder (31) is provided with a first valve housing portion (31j) recessed from the inner peripheral surface toward the outer side and housing a first reed valve (63) and a valve retainer (64). The valve retainer (64) has a first surface (64b) facing the first reed valve (63) and a second surface (64c) opposite to the first surface (64b). A center line (C1) extending in the longitudinal direction of the first reed valve (63) crosses an opening of the first valve housing portion (31j) that is close to the first cylinder chamber (S1). A first edge (31k) that is located on the opening of the first valve housing portion (31j) which is close to the first cylinder chamber (S1) and that is close to the valve attachment surface (31g) is located closer to the second surface (64c) of the valve retainer (64) than the valve attachment surface (31g) in a first direction orthogonal to the valve attachment surface (31g).