Daikin Industries Patente

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).

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.

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A refrigeration cycle apparatus (100) includes a bridge circuit (40). The bridge circuit (40) keeps a traveling direction of a refrigerant (R) the same in both a cold heat utilization operation and a hot heat utilization operation. The bridge circuit (40) includes a first flow path (AB), a second flow path (BC), a third flow path (DC), a fourth flow path (AD), and a first check valve (41), and a second check valve (42), a third check valve (43), and a fourth check valve (44) provided in the first flow path (AB), the second flow path (BC), the third flow path (DC), and the fourth flow path (AD), respectively. A flow path resistance of the fourth flow path (AD) is larger than a flow path resistance of the first flow path (AB), or a flow path resistance of the third flow path (DC) is larger than a flow path resistance of the second flow path (BC).

Provided is a refrigeration apparatus capable of reliable refrigerant recovery after a heating operation is stopped. This refrigeration apparatus performs a heating operation. The refrigeration apparatus includes a refrigerant circuit, a heat source fan, and a control unit. The refrigerant circuit has a compressor and a heat source heat exchanger. The heat source fan supplies air to the heat source heat exchanger. The control unit controls the compressor and the heat source fan. The control unit, upon detecting an instruction to stop the heating operation, starts a first operation to recover a refrigerant into the compressor or the heat source heat exchanger by driving the heat source fan while keeping the compressor stopped. When a termination condition where the refrigerant is in a predetermined state in the refrigerant circuit is satisfied, the control unit stops the heat source fan and terminates the first operation.

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