Daikin Industries Patente

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).

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" />

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).

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.

A first switching mechanism (15) is switchable between a first state in which a discharge side of a first compressor (11) is connected to a first water heat exchanger (14) or a refrigerant heat exchanger (30) and a second state in which the discharge side of the first compressor (11) is connected to a heat source heat exchanger (12). In a defrosting operation for defrosting the heat source heat exchanger (12), a control unit (100) drives the first refrigerant circuit (10) with the first switching mechanism (15) set in the second state.

A refrigeration cycle apparatus (100) includes a heat source heat exchanger (13) and a bridge circuit (40). The heat source heat exchanger (13) includes a refrigerant inlet pipe (13a), a refrigerant outlet pipe (13b), a plurality of refrigerant paths (61), a diverger (50), and a converger (70). The bridge circuit (40) always causes a refrigerant (R) to flow into the heat source heat exchanger (13) at the refrigerant inlet pipe (13a) and flow out of the heat source heat exchanger (13) at the refrigerant outlet pipe (13b). The plurality of refrigerant paths (61) is connected to a plurality of diverger pipes (56) of the diverger (50) and a plurality of converger pipes (75) of the converger (70). The number of the diverger pipes (56) is smaller than the number of the converger pipes (75).

An air composition adjustment device adjusts a composition of air in an internal space (5) of a container (1), the air composition adjustment device including a composition adjuster (200) that supplies, to the internal space (5), a gas to be treated having a composition different from a composition of external air generated by treating the external air, a control unit (110) that controls the composition adjuster (200), and a first pressure detector (170) that detects a pressure in the internal space (5), in which the composition adjuster (200) includes a conveyor (231a, 231b) that conveys the external air or the gas to be treated to the internal space (5), and the control unit (110) evaluates airtightness of the internal space (5) on the basis of a change in the pressure in the internal space (5) caused by operation of the conveyor (231a, 231b).

A stator (21) has a core (22), a coil (23), a first insulating portion (26), and a connecting portion (100). The coil (23) is a winding (23a) wound around each of teeth (25). The first insulating portion (26) is provided between the core (22) and the coil (23), and insulates the core (22) and the coil (23) from each other. The connecting portion (100) connects the first insulating portion (26) and the core (22). The connecting portion (100) is formed so that the coil (23) and the first insulating portion (26) can vibrate in the radial direction relative to the core (22).

A first head (31) has a first discharge port (49). A first discharge valve (60) opens and closes the first discharge port (49). A first fastener (61) fixes a base end portion of the first discharge valve (60) to the first head (31). A cylinder (70) has a vane chamber (73) configured to house a vane (77), the vane chamber (73) having a first center line (L1). The first head (31) is divided into a first region on the side of the first center line (L1) corresponding to the suction space and a second region on the side of the first center line (L1) corresponding to the discharge space when viewed from a first direction. The first fastener (61) is disposed in the first region of the first head (31).

A heat source unit (2) includes an electric component unit (70), a heat source-side refrigerant main flow path (300), and a first refrigerant sub flow path (46) including a first cooling portion (47) that cools a first portion of the electric component unit (70) and a second portion of the electric component unit (70). The heat source-side refrigerant main flow path (300) includes an accumulator (29), a compressor (21), a heat source-side heat exchanger (23), and a heat source-side expansion valve (25). The heat source-side refrigerant main flow path (300) is connected to a utilization-side refrigerant flow path (500) of a utilization unit (3a, 3b) to form a refrigerant circuit (10). The first refrigerant sub flow path (46) branches from a liquid flow path (340) extending from the heat source-side heat exchanger (23) to the utilization-side refrigerant flow path (500) in the heat source-side refrigerant main flow path (300), and causes a refrigerant to flow in a gas flow path (310) between the accumulator (29) and the compressor (21) in the heat source-side refrigerant main flow path (300).

A refrigeration cycle apparatus (100) includes a heat source heat exchanger (13), a utilization heat exchanger (23), and a bridge circuit (40). The heat source heat exchanger (13) includes a refrigerant inlet pipe 13a and a refrigerant outlet pipe 13b. The bridge circuit (40) always causes the refrigerant to flow into a first heat exchanger at the refrigerant inlet pipe and flow out of the first heat exchanger at the refrigerant outlet pipe. The first heat exchanger includes a diverger (50). A diverger body (51) of the diverger (50) has one intake port (53) and a plurality of exhaust ports (54). A plurality of refrigerant paths (61) of the heat source heat exchanger (13) includes a lowest path (61L) disposed at a height (H1) that is lowest. A height (H0) of the plurality of exhaust ports (54) is all higher than the height (H1) of the lowest path.

With a charging method, a refrigeration apparatus 1 is filled with a refrigerant and an odor component. The charging method includes a first step of providing a cylinder 51 containing a mixed liquid in which the odor component is dissolved, a second step of connecting the cylinder 51 to a refrigerant circuit 10 of the refrigeration apparatus 1, and a third step of filling the refrigerant circuit 10 with the mixed liquid supplied from the cylinder 51. Since the refrigerant and the odor component are mixed in a liquid phase, the odor component can be stably supplied and charged into the refrigerant circuit 10 at an appropriate concentration.

When a first compressor (11) and a second compressor (51) are in a stopped state, a control unit (100) executes a first operation in which the first compressor (11) is operated while keeping the second compressor (51) in the stopped state to cause heat dissipation of a first refrigerant in a refrigerant heat exchanger (52). After the first operation, the control unit (100) executes a second operation in which the second compressor (51) is operated.

A refrigerant flow path module (40) includes a flow path unit (32) provided with a first refrigerant flow path (R1) and a second refrigerant flow path (R2) through which a refrigerant flows, and a casing (33) that accommodates the flow path unit (32), in which the flow path unit (32) is formed with a synthetic resin or a material containing aluminum as a main component, and the casing (33) is formed with a steel material.

An indoor unit is an indoor unit of an air conditioning apparatus. The indoor unit is configured to adopt a zeotropic refrigerant as a refrigerant. The indoor unit includes a main heat exchanger, a flow divider, and a sensor. The main heat exchanger includes a plurality of tube passes through which the refrigerant flows. The flow divider is configured to divide the refrigerant before the refrigerant flows into the plurality of tube passes. The sensor is configured to detect a temperature of the refrigerant. The sensor is disposed near the flow divider, is disposed between the flow divider and the main heat exchanger, or is disposed on one of the tube passes defined by heat transfer tubes of the main heat exchanger, at a position that is closer to the flow divider than a midpoint of an entire length of the one of the tube passes is.

In a rotary compressor, when viewed in an axial direction, a region that overlaps a cylinder chamber (S1) between a blade (38) and a thin portion (52) is defined as a first region (77); a region that overlaps the cylinder chamber (S1) between the blade (38) and a suction port is defined as a second region (78); and when a piston (35) is located at a bottom dead center, a gap (CR1) between part of an outer edge of the piston (35) that corresponds to the first region (77) and part of a closing member (50) that corresponds to the first region (77) is larger than a gap (CR2) between part of the piston (35) that corresponds to the second region (78) and part of the closing member (50) that corresponds to the second region (78).

A heat source unit (10) includes a casing (50), a vertical partition plate (70), a compressor (11), and a heat source fan (14). The casing (50) has a bottom plate (52) and an internal space (S). The vertical partition plate (70) partitions the internal space (S) into a fan chamber (S3) and a machine chamber (S4). The compressor (11) is disposed in the machine chamber (S4) and compresses a refrigerant (R). The heat source fan (14) is disposed in the fan chamber (S3). The bottom plate (52) has a machine chamber wall (526). The machine chamber wall (526) extends upward from a peripheral edge of a machine chamber bottom surface portion (522). The vertical partition plate (70) has a partition opening (75). The partition opening(75) allows the fan chamber (S3) and the machine chamber (S4) to communicate with each other. A height (H2) of a lower end (75L) of the partition opening (75) is lower than a height (H0) of the machine chamber wall (526).

An air conditioner (1) includes an indoor unit (2) and an outdoor unit (3). The indoor unit (2) includes a first heat exchanger (20). The outdoor unit (3) includes a second heat exchanger (30). The first heat exchanger (20) includes a first flat tube (21) including a first base material (212) and a first surface layer (213), and a first fin (22). The first fin (22) is joined to the first flat tube (21). The second heat exchanger (30) includes a second flat tube (31) including a second base material (312) and a second surface layer (313), and a second fin (32). The second fin (32) is joined to the second flat tube (31). A potential increases in the order of the first surface layer (213), the first fin (22), and the first base material (212), a potential increases in the order of the second fin (32), the second surface layer (313), and the second base material (312).

A refrigeration apparatus (1) includes a refrigerant circuit (10), wherein tetrahydrothiophene, as an odor component, is sealed in the refrigerant circuit (10) along with a refrigerant and a refrigerating machine oil, and following Formula (1) is satisfied, where an amount of leakage of the refrigerant that leaks from the refrigerant circuit (10) at a leakage rate of 0.001 kg/h for four minutes is referred to as M<leak1> [kg], a fill amount of the odor component into the refrigerant circuit (10) is referred to as M<od> [kg], a fill amount of the refrigerating machine oil is referred to as M<oil> [kg], solubility of the odor component in the refrigerating machine oil is referred to as S<oil> [weight ppm], a fill amount of the refrigerant into the refrigerant circuit (10) is referred to as M<ref> [kg], a volume of a room (LS) is referred to as V [m<3>], and a density of the odor component is referred to as ρ [kg/m<3>]. [Formula 1] 1 > M leak 1 × M od − M oil × S oil / M ref 0.25 × V × ρ <img class="EMIRef" id="47e9cd3b-fd97-46d5-a8ba-803150d14fef-ia01" />

A screw compressor includes a compression mechanism including a screw rotor and configured to compress a refrigerant, a motor configured to rotate the screw rotor and including a coil and a stator core, an inverter configured to supply electric power to the motor and to be cooled by a liquid refrigerant, and a casing including a suction chamber configured to receive the refrigerant from outside, a rotor chamber configured to accommodate the compression mechanism, and a motor chamber configured to accommodate the motor and located between the suction chamber and the rotor chamber, wherein the liquid refrigerant that has cooled the inverter is supplied to one or more coil ends of the coil or the stator core.

A refrigeration cycle apparatus with which highly efficient operation is possible has been demanded. An air conditioner (100) includes a first refrigerant circuit (110) and a second refrigerant circuit (120). The first refrigerant circuit includes a first compressor (10), a first heat exchanger (40) functioning as a radiator for a refrigerant, a first expansion valve (50), and a second heat exchanger (60) functioning as a heat absorber for the refrigerant. The second refrigerant circuit connects a portion between the first compressor and the first heat exchanger and a portion between the first heat exchanger and the first expansion valve. The second refrigerant circuit includes a second compressor (20). Suction pressure of the first compressor is lower than suction pressure of the second compressor. The first compressor is a scroll compressor, and the second compressor is a rotary compressor. Alternatively, the first compressor is a scroll compressor having a first design compression ratio, and the second compressor is a scroll compressor having a second design compression ratio smaller than the first design compression ratio.

A rotary compressor includes: a casing; cylinders disposed inside the casing; pistons configured to eccentrically rotate inside the cylinders; a shaft connected to the pistons and including a cavity; a pipe disposed inside the cavity and apart from a wall of the cavity; an upper bearing disposed over the cylinders and configured to pivotally support the shaft; a lower bearing disposed below the cylinders and configured to pivotally support the shaft; a rear muffler disposed below the lower bearing; and a positive displacement pump attached to the rear muffler and configured to discharge oil into the pipe.

A rotary compressor including: a casing; a cylinder disposed inside the casing; a piston configured to eccentrically rotate inside the cylinder; a hollow shaft coupled to the piston and having an internal space; an upper bearing disposed over the cylinder and configured to rotatably support the shaft; a lower bearing disposed under the cylinder and configured to rotatably support the shaft; a rear muffler disposed under the lower bearing; and a positive displacement pump attached to the rear muffler and configured to discharge oil into the internal space.

To provide a refrigeration cycle apparatus capable of performing efficient operation even under a low-load condition. An air conditioner (100) includes a first refrigerant circuit (110), a second refrigerant circuit (120), a bypass flow path (130), and a bypass valve (132). The first refrigerant circuit includes a first compressor (10), a radiator (40), a first expansion valve (50), and a heat absorber (60). The second refrigerant circuit connects a portion between the first compressor and the radiator and a portion between the radiator and the first expansion valve to each other and includes an economizer (70), a first valve (80), and a second compressor (20). The economizer is disposed between the radiator and the heat absorber, and the second compressor sucks a refrigerant that has passed through the economizer. The bypass flow path connects a portion between the first valve and the second compressor and a portion between the heat absorber and the first compressor. The bypass valve is disposed in the bypass flow path. The second compressor is a compressor that is smaller in displacement than the first compressor.

A rotary compressor includes: a casing (11); a cylinder (41, 42) disposed inside the casing; a piston (61, 62) configured to eccentrically rotate inside the cylinder; a shaft (81) coupled to the piston (61, 62) and having a cavity (81a) therein; piping (85, 185, 285, 385) disposed inside the cavity (81a) and spaced apart from a wall of the cavity (81a); an upper bearing (32) disposed over the cylinder and configured to rotatably support the shaft; a lower bearing (31) disposed under the cylinder and configured to rotatably support the shaft; a rear muffler (34) disposed under the lower bearing; and a positive displacement pump (50) attached to the rear muffler and configured to discharge oil between the piping and the wall.

A screw compressor includes a compression mechanism including a screw rotor and configured to compress a refrigerant; a rotation shaft to which the screw rotor is fixed; a motor configured to rotate the rotation shaft; and a casing having a suction chamber configured to introduce the refrigerant from outside, a rotor chamber configured to house the compression mechanism, and a motor chamber configured to house the motor and positioned between the suction chamber and the rotor chamber, wherein the rotation shaft includes a first flow path that communicates with the suction chamber and that extends along a first direction that is an axial direction; and a second flow path that communicates with the motor chamber and the first flow path and that extends along a second direction intersecting the first direction.

Providing a refrigeration cycle apparatus capable of suppressing liquid compression. An air conditioner includes a first refrigerant circuit, a second refrigerant circuit, and a control device. The first refrigerant circuit includes a first compressor, a first heat exchanger functioning as a radiator during cooling operation, a first expansion valve, and a second heat exchanger functioning as a heat absorber during the cooling operation. The second refrigerant circuit c a portion between the first compressor and the first heat exchanger and a portion between the first heat exchanger and the first expansion valve. The second refrigerant circuit includes a second compressor and a first valve. The first valve is disposed on an upstream side of the second compressor. The control device controls the first compressor, the second compressor, the first expansion valve, and the first valve. The control device closes the first valve when the second compressor is to be stopped.

An outdoor unit (3) of an air conditioner (1) is provided with a blow-out grille (59) including a connecting rib (70) extending radially and a plurality of concentric annular ribs (80) intersecting the connecting rib (70). The annular ribs (80) include a first annular rib (81) and a second annular rib (82). In a direction orthogonal to an rotation axis (X1) of the fan (38), the first annular rib (81) is disposed in a first region (61), and the second annular rib (82) is disposed in a second region (62) located further toward the outer peripheral side of the blow-out grille (59) than the first region (61). In a cross-section including the rotation axis (X1), the first annular rib (81) is inclined in a direction further toward the rotation axis (X1) with increasing distance from the fan (38), and the second annular rib (82) is inclined in a direction further toward an outer periphery of the blow-out grille (38) than the first annular rib (81), with increasing distance from the fan (38).

A technique by which the performance of a closed impeller of a centrifugal compressor can be improved is provided. A compressor 10 according to an embodiment of the present disclosure includes an impeller 200, and a casing 100 configured to house the impeller 200. The impeller 200 includes a hub 210 having a meridional plane 211, a plurality of blades 220 provided on the meridional plane 211, and a shroud 230 provided on tips of the plurality of blades 220 so as to cover the meridional plane 211. The shroud 230 has a first passage 235 penetrating between an inner surface of the shroud 230 facing the meridional plane 211 and an outer surface of the shroud 230 facing an inner surface of the casing 100. The first passage 235 has a first opening 235B in the outer surface of the shroud 230 and a second opening 235A in the inner surface of the shroud 230. In a cross section including an axis AX of a rotating shaft 250 of the impeller 200, the first passage 235 is inclined such that a center 235Bc of the first opening 235B is located on an inlet 200in side of the impeller 200 relative to a center 235Ac of the second opening 235A.

With respect to a thrust magnetic bearing, a technology for appropriately holding an assembly of an insulating member and a coil in a groove portion of a core is provided. A thrust magnetic bearing 500 according to an embodiment of the present disclosure is a thrust magnetic bearing 500 for supporting a thrust load on a rotating shaft 250 of a compressor 10, the thrust magnetic bearing including an annular core 520 provided with a groove portion 521 having an annular opening 521A at an end face in an axial direction; and a coil assembly 530 including an annular insulating member 540 and a coil 550 wound around the insulating member 540, the coil assembly 530 being accommodated in the groove portion 521, wherein an outer diameter D2 of the opening 521A is shorter than an outer diameter d2 of the coil assembly 530 in a part of or an entirety of a circumferential direction, or an inner diameter D1 of the opening 521A is longer than an inner diameter d1 of the coil assembly 530 in a part of or an entirety of the circumferential direction.

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.

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 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 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; 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).

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 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 (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.

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); 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.