Daikin Industries Patente

A showcase includes a refrigerant circuit and a refrigerant enclosed in the refrigerant circuit. The refrigerant circuit includes a compressor (121), a radiator (122), an expansion valve (123), and an evaporator (124). The refrigerant is a low-GWP refrigerant.

The present invention provides an etching gas comprising 1,1,1,2-tetrafluoroethane and a fluorocarbon-based compound with at least one double bond

A heat source apparatus (1) includes: a water heat exchanger (15) included in a refrigerant circuit (11); a cylinder (71) storing a flammable refrigerant and having, in a lower portion, a discharge port (71a) through which the flammable refrigerant is discharged; a casing (21) configured to house the water heat exchanger and the cylinder. A first water pipe (41) and a second water pipe (42) are connected to the water heat exchanger. A rear panel (27) of the casing has insertion ports (IP) for insertion of the first water pipe and the second water pipe. A front panel (26) of the casing has an access port (AP) that allows access to the cylinder.

A heat source apparatus includes: a cylinder (71) of which a lower portion is provided with a discharge port (71a); and a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are installed. The cylinder (71) is disposed between the compressor (12) and a side (23a) of the bottom plate (23). A first straight line (L1) is defined as a straight line passing through a center of gravity of the compressor (12) and a center of gravity of the cylinder (71) in top view of the bottom plate (23). A second straight line (L2) is defined as a straight line orthogonal to the side (23a) of the bottom plate (23) and passing through the center of gravity of the compressor (12) in the top view. The first straight line (L1) and the second straight line (L2) form a predetermined angle (θ1).

A heat source apparatus includes: a compressor (12) in a refrigerant circuit (11) that performs a refrigeration cycle; a cylinder (71) which is configured to store a flammable refrigerant for filling the refrigerant circuit (11) and which has a lower portion provided with a discharge port (711) through which the flammable refrigerant is discharged; an accumulator (17) connected to the compressor (12); and a casing (21) having a bottom plate (23) on which the compressor (12), the cylinder (17), and the accumulator (17) are installed, wherein in top view, a first virtual line (L1) connecting a center (12b) of the compressor (12) and a center (71b) of the cylinder (71) and a second virtual line (L2) connecting the center (12b) of the compressor (12) and a center (17b) of the accumulator (17) form a predetermined angle (θ).

A heat source apparatus includes: a compressor (12) in a refrigerant circuit (11) that performs a refrigeration cycle; a cylinder (71) which is configured to store a flammable refrigerant for filling the refrigerant circuit (11) and which has a lower portion provided with a discharge port (711) through which the flammable refrigerant is discharged; a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are installed; and a height adjustment member (74c) configured to define a height of a mount surface of a bottom surface of the cylinder (71) from the bottom plate (23), wherein a distance between the compressor (12) and the cylinder (71) is represented by D; a height from the bottom plate (23) to a corner portion (12e) of an upper portion of the compressor (12) is represented by H1; and a height of the cylinder (71) from the bottom plate (23) is represented by H2, where the following relation is satisfied: H1 × sinθ ≥ H2, θ = tan^-1 (H2/D).

A heat source apparatus includes: a compressor (12) in a refrigerant circuit (11) that performs a refrigeration cycle; a cylinder (71) which is configured to store a flammable refrigerant for filling the refrigerant circuit (11) and which has a lower portion provided with a discharge port (711) through which the flammable refrigerant is discharged; a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are installed; and a plate member (81) disposed between the compressor (12) and the cylinder (71).

An axial fan (30) includes a plurality of blades (33) configured to rotate about a predetermined axis (A1). Each blade has a leading edge portion (38) including a leading edge (36) and a porous portion (46) that is located behind the leading edge portion in a rotation direction (D1) and forms a positive pressure surface (40). In a blade cross section taken along a chord line (CLa) of the blade, the positive pressure surface of the leading edge portion has a raised portion (49) in which an absolute value of an angle formed by a tangent (TLa) to the positive pressure surface and the chord line decreases to zero with increasing distance from the leading edge toward a rear side in the rotation direction, and then increases to reach a change point (Pc) at which a rate of change of the absolute value starts to decrease.

In an indoor unit (7), a cross-flow fan (70) is disposed at a position corresponding to an inlet port (52) in a casing (50). The inlet port includes a first region (A1) overlapping the cross-flow fan in front view and a second region (A2) located on a side closer to a tongue portion (63) provided in the casing relative to the first region. Among a plurality of guide panels provided in the inlet port, a first guide panel (92a) closest to the center of the cross-flow fan in the first region is in an orientation extending upward toward the cross-flow fan, and a second guide panel (92b) located in the second region is provided in an orientation extending downward toward the cross-flow fan.

A heat source apparatus (1) includes: a cylinder (71) storing a flammable refrigerant and having, in a lower portion, a discharge port (71a) through which the flammable refrigerant is discharged; a casing (21) having a bottom plate (23) on which a compressor (12) and the cylinder are installed; and a restriction portion (80) configured to restrict a direction of displacement of the compressor when the heat source apparatus falls. In a top view with the heat source apparatus installed, a first straight line (L1) is defined as a straight line passing through a center of gravity (C1) of the compressor and a center of gravity (C2) of the cylinder. The restriction portion is configured to restrict the displacement of the compressor toward the cylinder to a direction deviating from the first straight line under a condition in which the first straight line is aligned with a direction of gravity.

Provided is a method for producing a reclaimed refrigerant composition in which disproportionation of the reclaimed refrigerant composition to be obtained is suppressed, and additionally, acid generation resulting from the reaction between the refrigerant composition and oxygen is suppressed, as compared with known methods. Specifically, provided is a method for producing a reclaimed refrigerant composition comprising (E)-1,2-difluoroethylene, the method comprising step 1 of removing oxygen and water from a mixed refrigerant composition to be treated, the mixed refrigerant composition to be treated comprising the (E)-1,2-difluoroethylene, wherein step 1 is performed at a pressure of 5 MPa·G or less.

A heat source apparatus includes: a cylinder (71) of which a lower portion is provided with a discharge port (71a); a fan (30) configured to transport air that exchanges heat with the air heat exchanger (13); and a casing (21) having a bottom plate (23) on which the compressor (12), the air heat exchanger (13), and the cylinder (71) are installed. The heat source apparatus further includes a partition (45) that partitions an inside of the casing (21) into a first chamber (S1) that houses the air heat exchanger (13) and the fan (30) and a second chamber (S2) that houses the compressor (12) and the cylinder (71). The cylinder (71) is closer to the first chamber (S1) than the compressor (12) is.

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In a reheating pipe (33) of a refrigerant circuit (30), a fifth expansion valve (EV5) is provided downstream of a reheating heat exchanger (58). In a dehumidifying operation, an inner heat exchanger (57) cools and dehumidifies air. In the dehumidifying operation, a refrigerant discharged from a compressor (50) is supplied to the reheating heat exchanger (58). The reheating heat exchanger (58) heats the air dehumidified in the inner heat exchanger (57). When a controller (90) changes the opening degree of the fifth expansion valve (EV5), the flow rate of the refrigerant in the reheating heat exchanger (58) changes, and the temperature of the air having passed through the reheating heat exchanger (58) changes.

A refrigerant circuit (30) of a refrigeration apparatus (10) has a defrosting pipe (32) and a fourth expansion valve (EV4). The refrigeration apparatus (10) performs a defrosting operation to melt the frost on an inner heat exchanger (57). In the defrosting operation, a refrigerant discharged by a compressor (50) flows in the defrosting pipe (32), is then decompressed when passing through the fourth expansion valve (EV4), and then flows into the inner heat exchanger (57). A controller (90) controls the opening degree of the fourth expansion valve (EV4) based on one or both of the pressure and the temperature of the refrigerant discharged by the compressor (50) in the defrosting operation.

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