Heat source apparatus

Abstract

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).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a heat source apparatus.BACKGROUND ART

[0002] Patent Document 1 discloses a heat source apparatus that includes a compressor connected to a refrigerant circuit. The compressor is installed on a bottom plate in a casing of the heat source apparatus.CITATION LISTPATENT DOCUMENT

[0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2013-155921SUMMARY OF THE INVENTIONTECHNICAL PROBLEM

[0004] The inventors of the present application have created a configuration in which a refrigerant cylinder is provided in the casing of the heat source apparatus. The refrigerant cylinder stores a refrigerant for filling the refrigerant circuit. Thus, when the heat source apparatus is installed, the refrigerant circuit can be filled with the refrigerant from the refrigerant cylinder, and thus it is unnecessary to separately prepare a refrigerant for filling the circuit. On the other hand, when the refrigerant cylinder is provided in the casing, the following specific problems arise.

[0005] When the heat source apparatus is transported before being installed on a site, there is a risk that the casing is dropped. Here, the compressor and the refrigerant cylinder are provided in the casing. Due to the impact generated by the casing being dropped and coming into contact with the ground, the compressor may be displaced toward the refrigerant cylinder. In this case, if the compressor collides with the refrigerant cylinder, the refrigerant cylinder may be damaged, and the refrigerant may leak into the air.

[0006] An object of the present disclosure is to reduce the impact which a cylinder receives from a compressor when a casing is dropped.SOLUTION TO THE PROBLEM

[0007] A first aspect is directed to a heat source apparatus. The 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).

[0008] According to the first aspect, even if the compressor (12) is displaced toward the cylinder (71), for example, due to the impact generated by the casing (21) being dropped and coming into contact with the ground, it is possible to reduce the momentum of the compressor (12) toward the cylinder (71) by the compressor (12) colliding with the plate member (81) of the box member (80) before reaching the cylinder (71). Thus, it is possible to reduce the impact which the cylinder (71) receives from the compressor (12).

[0009] A second aspect is an embodiment of the first aspect. In the second aspect, in top view, a shortest distance (V2) between the compressor (12) and the plate member (81) is smaller than a shortest distance (V1) between the cylinder (71) and the plate member (81).

[0010] According to the second aspect, even if the compressor (12) is displaced toward the cylinder (71), it is possible to effectively reduce the momentum of the compressor (12) toward the casing (21) by promptly allowing the compressor (12) to coming into contact with the plate member (81).

[0011] A third aspect is an embodiment of the first or second aspect. In the third aspect, the heat source apparatus further includes: a box member (80) covering the compressor (12), wherein the plate member (81) is part of the box member (80).

[0012] According to the third aspect, the plate member (81) is part of the box member (80), whereby the entire part of the box member (80) effectively absorbs the impact from the plate member (81) even if the compressor (12) collides with the plate member (81).

[0013] A fourth aspect is an embodiment of the third aspect. In the fourth aspect, the box member (80) includes a plurality of corner portions (82) and a flat portion (81b) located between the corner portions (82) adjacent to each other, and the flat portion (81b) faces the cylinder (71).

[0014] According to the fourth aspect, even if the compressor (12) is displaced toward the cylinder (71), it is possible to reduce the corner portion (82) of the box member (80) colliding with the cylinder (71).

[0015] A fifth aspect is an embodiment of the third aspect. In the fifth aspect, a height of the box member (80) from the bottom plate (23) is greater than a height of the cylinder (71) from the bottom plate (23).

[0016] According to the fifth aspect, even if the compressor (12) collides with the box member (80) by being displaced toward the cylinder (71), and then the compressor (12) and the box member (80) are displaced toward the cylinder (71) together, it is possible to prevent the corner portion (82) at the upper end of the box member (80) from colliding with the cylinder (71).

[0017] A sixth aspect is an embodiment of the third aspect. In the sixth aspect, the compressor (12) is installed on a support plate (51) provided above the bottom plate (23), and the box member (80) is installed on the bottom plate (23).

[0018] According to the sixth aspect, the compressor (12) and the box member (80) are installed on different members, whereby the compressor (12) and the box member (80) do not vibrate in the same manner. Thus, the impact from the compressor (12) can be effectively absorbed by the box member (80).

[0019] A seventh aspect is an embodiment of the third aspect. In the seventh aspect, the compressor (12) and the box member (80) are installed on a support plate (51) provided above the bottom plate (23).

[0020] According to the seventh aspect, the compressor (12) and the box member (80) are installed on the same member, whereby it is possible to downsize the box member (80).

[0021] An eighth aspect is an embodiment of any one of the third to seventh aspects. In the eighth aspect, the heat source apparatus further includes: a cushioning member installed on the box member (80).

[0022] According to the eighth aspect, the impact from the compressor (12) can be effectively absorbed by the box member (80).

[0023] A ninth aspect is an embodiment of any one of the third to seventh aspects. In the ninth aspect, the box member (80) functions as a sound insulation member.

[0024] According to the ninth aspect, leakage of the driving noise of the compressor (12) to the outside can be effectively reduced by the box member (80).

[0025] A tenth aspect is an embodiment of any one of the third to seventh aspects. In the tenth aspect, the heat source apparatus further includes: a sound absorbing member installed on the box member (80).

[0026] According to the tenth aspect, leakage of the driving noise of the compressor (12) to the outside can be effectively reduced by the box member (80).BRIEF DESCRIPTION OF THE DRAWINGS

[0027] [FIG. 1] FIG. 1 is a schematic piping system diagram of a refrigerant circuit of a heat source apparatus of an embodiment. [FIG. 2] FIG. 2 is a schematic perspective view of an outdoor unit. [FIG. 3] FIG. 3 is a front view of the outdoor unit and shows that an access port on the front side of a machine chamber is opened. [FIG. 4] FIG. 4 is a schematic plan view of the inside of the outdoor unit. [FIG. 5] FIG. 5 is a right side view of the inside of the outdoor unit, where a side plate is removed. [FIG. 6] FIG. 6A and FIG. 6B show variations of a plate member in top view. [FIG. 7] FIG. 7A and FIG. 7B show variations of the angle between a virtual line connecting the center of a compressor with the center of a cylinder and a plate surface of a plate member in top view. [FIG. 8] FIG. 8A shows the compressor, the cylinder, and the plate member in the dropping casing of the outdoor unit. FIG. 8B shows that the compressor displaced toward the cylinder due to the impact by dropping collides with the plate member. FIG. 8C shows that the compressor of which the momentum has been reduced by the collision with the plate member collides with the cylinder via the plate member. [FIG. 9] FIG. 9 is a side view showing the positional relation among the compressor, the cylinder, and a box member. [FIG. 10] FIG. 10A and FIG. 10B show variations of the box member in top view. [FIG. 11] FIG. 11A and FIG. 11B show variations of the box member in top view. [FIG. 12] FIG. 12A shows the compressor and the cylinder in the dropping casing of the outdoor unit. FIG. 12B shows that the compressor displaced toward the cylinder due to the impact by dropping collides with the plate member before reaching the cylinder. FIG. 8C shows that the compressor of which the momentum has been reduced by the collision with the box member collides with the cylinder via the box member. [FIG. 13] FIG. 13 shows that a corner portion of the box member collides with the cylinder. [FIG. 14] FIG. 14A and FIG. 14B are side views showing variations of the positional relation among the compressor, the cylinder, and the box member. DESCRIPTION OF EMBODIMENTS

[0028] Embodiments of the present disclosure will be described in detail below with reference to the drawings. The present disclosure is not limited to the embodiments shown below, and various changes can be made within the scope without departing from the technical concept of the present disclosure. Since each of the drawings is intended to illustrate the present disclosure conceptually, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.(1) Basic Configuration of Heat Source Apparatus

[0029] A heat source apparatus (1) of this embodiment forms a refrigeration cycle apparatus that performs a refrigeration cycle. The refrigeration cycle apparatus is applied to a hot water supply apparatus. The heat source apparatus (1) heats water and supplies the heated water to target components. The heat source apparatus (1) has an outdoor unit (20) installed outdoors. The outdoor unit (20) has a casing (21). The casing (21) houses the entire part of a refrigerant circuit (11) which is a closed circuit. The refrigerant circuit (11) is filled with a refrigerant. The refrigerant circuit (11) performs a refrigeration cycle.

[0030] The refrigerant in the refrigerant circuit (11) is a flammable refrigerant. Specifically, the refrigerant in this embodiment is propane (R290), a natural refrigerant that is highly flammable. The natural refrigerant is a refrigerant which has an ozone depletion potential of zero and a low global warming potential and thus which has less impact on the environment. Propane ignites at 500°C or less.

[0031] The flammable refrigerant may be methane (R50), ethane (R170), butane (R600), or isobutane (R600a). The natural refrigerant may be a corrosive refrigerant such as ammonia (R717).(1-1) Refrigerant Circuit

[0032] As shown in FIG. 1, the refrigerant circuit (11) has a compressor (12), an air heat exchanger (13), an expansion valve (14), a water heat exchanger (15), and a cylinder (71) as main components. The refrigerant circuit (11) further has a four-way switching valve (16) and an accumulator (17).

[0033] The compressor (12) compresses a refrigerant. The discharge side of the compressor (12) is connected with a discharge pipe (18), and the suction side of the compressor (12) is connected with a suction pipe (19). The air heat exchanger (13) exchanges heat between a refrigerant and outdoor air. The expansion valve (14) decompresses a refrigerant. The water heat exchanger (15) exchanges heat between a refrigerant in the refrigerant circuit (11) and water in a water circuit (40). The four-way switching valve (16) switches the direction in which a refrigerant circulates. The four-way switching valve (16) switches between a first state in which a first port (16a) and a third port (16c) communicate with each other and a second port (16b) and a fourth port (16d) communicate with each other (the state indicated by the solid lines in FIG. 1) and a second state in which the first port (16a) and the second port (16b) communicate with each other and the third port (16c) and the fourth port (16d) communicate with each other (the state indicated by the broken lines in FIG. 1). The accumulator (17) stores liquid contained in a refrigerant sucked into the compressor (12).

[0034] The cylinder (71) is connected to the refrigerant circuit (11) via a connection pipe (72). The connection pipe (72) of this embodiment is connected to the suction pipe (19). The connection pipe (72) is provided with a control valve (73). The cylinder (71) is filled with a refrigerant before the heat source apparatus (1) is shipped out. After the heat source apparatus (1) has been transported to a site, an operator decompresses the refrigerant circuit (11). Then, when the operator opens the control valve (73), the refrigerant in the cylinder (71) is allowed to fill the refrigerant circuit (11).

[0035] The refrigerant circuit (11) performs a first refrigeration cycle and a second refrigeration cycle. In FIG. 1, the flow of a refrigerant in the first refrigeration cycle is indicated by the solid arrow, and the flow of a refrigerant in the second refrigeration cycle is indicated by the broken arrow. In the first refrigeration cycle, the four-way switching valve (16) is in the first state, where the water heat exchanger (15) functions as a radiator (a condenser) and the air heat exchanger (13) functions as an evaporator. In the second refrigeration cycle, the four-way switching valve (16) is in the second state, where the air heat exchanger (13) functions as a radiator (a condenser) and the water heat exchanger (15) functions as an evaporator.(1-2) Water Circuit

[0036] The water circuit (40) is connected to the water heat exchanger (15). The water circuit (40) includes a first water pipe (41) upstream of the water heat exchanger (15) and a second water pipe (42) downstream of the water heat exchanger (15). The water circuit (40) is connected with a pump (43). The pump (43) transports water in the water circuit (40). The water in the water circuit (40) is supplied to target components such as a boiler tank, an air-conditioning unit, and a floor heating unit. The water circuit (40) is connected with a gas-liquid separator (44). The gas-liquid separator (44) discharges to the atmosphere the refrigerant that has leaked from the refrigerant circuit (11) to the water circuit (40) via the water heat exchanger (15).(2) Outdoor Unit

[0037] The configuration of the outdoor unit (20) will be described in detail with reference to FIGS. 2 to 5. In the following description, the terms for the directions such as "top", "bottom", "right", "left", "front", and "back" refer to the directions of the arrows in FIG. 2. The outdoor unit (20) has the casing (21), components of the refrigerant circuit (11), and components of the water circuit (40). In addition to the elements described above, the components of the refrigerant circuit (11) include a refrigerant pipe, an electromagnetic valve, an internal heat exchanger, a filter, a thermal insulator for piping, and the like. The outdoor unit (20) has a partitioning member (45) that partitions the casing (21), and a fan (30) that transports the outdoor air.(2-1) Casing and Partitioning Member

[0038] The casing (21) is installed outdoors. The casing (21) is formed in a hollow box shape. More precisely, the casing (21) is formed in a box shape of which the left surface and the rear surface are opened partially. The casing (21) is formed in a rectangular parallelepiped shape of which the longitudinal direction is the first direction (the left-right direction) and the lateral direction is the second direction (the front-back direction). The casing (21) is comprised of metallic plate members. The casing (21) has a top plate (22), a bottom plate (23), a right plate (24), a left plate (25), a front plate (26), and a rear plate (27). The top plate (22) forms the upper surface of the casing (21), the bottom plate (23) forms the lower surface of the casing (21), the right plate (24) forms the right surface of the casing (21), the left plate (25) forms the left surface of the casing (21), the front plate (26) forms the front surface of the casing (21), and the rear plate (27) forms the rear surface of the casing (21). The left plate (25) is located in the front side of the casing (21) and is continuous with the front plate (26). The rear plate (27) is located in the right side of the casing (21) and is continuous with the right plate (24).

[0039] The partitioning member (45) is provided in the casing (21). The partitioning member (45) extends from the bottom plate (23) to the top plate (22). The partitioning member (45) extends in the front-back direction in top view. The partitioning member (45) partitions the inside of the casing (21) into a fan chamber (S1) as a first chamber and a machine chamber (S2) as a second chamber. The fan chamber (S1) is formed on the left side of the casing (21), and the machine chamber (S2) is formed on the right side of the casing (21).

[0040] The casing (21) has an inlet port (28) and an outlet port (29). The inlet port (28) is formed in part of the casing (21) that is from the rear surface to the left surface of the fan chamber (S1). The outlet port (29) is formed in part of the front plate (26) of the casing (21) that is in a front part of the fan chamber (S1). In the fan chamber (S1), a flow path in which the outdoor air flows is formed from the inlet port (28) to the outlet port (29). The casing (21) includes a side surface (21a), and the cylinder (71) is located closer to the side surface (21a) than the compressor (12) is.(2-2) Configuration of Fan Chamber

[0041] The fan chamber (S1) is a substantially rectangular parallelepiped space. The length of the fan chamber (S1) in the first direction is greater than the length in the second direction. The fan chamber (S1) is provided with the air heat exchanger (13), the fan (30), and a bell mouth (31).

[0042] The air heat exchanger (13) is formed in an L-shape in top view. The air heat exchanger (13) has a first heat exchange portion (13a) along the rear surface of the fan chamber (S1) and a second heat exchange portion (13b) along the left surface of the fan chamber (S1). The air heat exchanger (13) is a fin-and-tube heat exchanger. A heat transfer tube of the air heat exchanger (13) is a multi-bored flat tube, but may be a straight tube.

[0043] The fan (30) is a propeller fan which has a motor (30a) and an impeller (30b). The motor (30a) is located behind the impeller (30b). The motor (30a) is supported by a support base (32) installed on the bottom plate (23). The motor (30a) drives and rotates the impeller (30b). The bell mouth (31) is in a tubular shape formed around the impeller (30b). The bell mouth (31) is continuous with the outlet port (29).

[0044] Part of the air heat exchanger (13) of this embodiment extends to the machine chamber (S2). The first heat exchange portion (13a) is located behind the partitioning member (45). The first heat exchange portion (13a) extends in the right direction to pass through a space behind a rear end portion of the partitioning member (45). A right end portion of the first heat exchange portion (13a) is located in the machine chamber (S2).(3) Configuration of Machine Chamber

[0045] The machine chamber (S2) is a substantially rectangular parallelepiped space. The length of the machine chamber (S2) in the first direction is substantially equal to the length in the second direction. The length of the machine chamber (S2) in the third direction (the top-bottom direction) is greater than the lengths in the first direction and the second direction. The length of the machine chamber (S2) in the first direction is smaller than the length of the fan chamber (S1) in the first direction. The compressor (12), the water heat exchanger (15), the gas-liquid separator (44), and the accumulator (17) are disposed in the machine chamber (S2). The outdoor unit (20) further includes a vibration reduction mechanism (50), a sound insulation member (60), and a filling unit (70). In this embodiment, the first direction, the second direction, and the third direction are perpendicular to one another; the first direction and the second direction are parallel to the horizontal direction; and the third direction is parallel to the vertical direction. In this embodiment, the first direction is the left-right direction; the second direction is the front-back direction; and the third direction is the top-bottom direction. In other words, the third direction is the direction in which the gravity acts (the gravity direction).(3-1) Compressor

[0046] The compressor (12) is disposed in the front side and in the left side of the machine chamber (S2). The compressor (12) has a compressor casing (12a) that is formed in a cylindrical shape. The compressor casing (12a) is formed in a vertically-long hollow cylindrical shape of which the height is greater than the outer diameter. The compressor casing (12a) forms a hermetically-closed pressure-resistant container. A top portion of the compressor casing (12a) is connected with the suction pipe (19). The compressor casing (12a) is connected with the discharge pipe (18). The compressor (12) is, for example, a scroll compressor. In the compressor casing (12a), a compression mechanism (12d) is provided which includes an orbiting scroll and a fixed scroll and which compresses a refrigerant in a compression chamber formed between the orbiting scroll and the fixed scroll.(3-2) Water Heat Exchanger

[0047] The water heat exchanger (15) is disposed in the right side of the machine chamber (S2). The water heat exchanger (15) is closer to the right plate (24) than the compressor (12) is. The water heat exchanger (15) is closer to the rear plate (27) than the compressor (12) is. The water heat exchanger (15) is a plate heat exchanger. The water heat exchanger (15) is connected with the first water pipe (41), the second water pipe (42), and a refrigerant pipe (not shown).(3-3) Gas-Liquid Separator

[0048] The gas-liquid separator (44) is disposed above the water heat exchanger (15). The gas-liquid separator (44) is supported from below by the water heat exchanger (15). The gas-liquid separator (44) is provided with a release path that releases a gas refrigerant separated in the gas-liquid separator (44) and a gas vent valve that opens and closes the release path (not shown).(3-4) Accumulator

[0049] The accumulator (17) is connected to the suction pipe (19). The accumulator (17) is disposed in the rear side of the machine chamber (S2). The accumulator (17) is closer to the rear plate (27) than the compressor (12) and the water heat exchanger (15) are. The accumulator (17) is formed in a vertically-long hollow cylindrical shape of which the height is greater than the outer diameter.(3-5) Vibration Reduction Mechanism

[0050] The vibration reduction mechanism (50) reduces vibration of the compressor (12) and the accumulator (17). The vibration reduction mechanism (50) of this embodiment has a support plate (51) that supports the compressor (12) from below and an elastic support portion (52) that is fixed on the bottom plate (23) and supports the support plate (51) from below.

[0051] The compressor (12) is fixed on the support plate (51). The support plate (51) is a plate member which has a substantially triangular shape in top view. A circular hole into which a bottom portion of the compressor (12) is fitted is formed in the center of the support plate (51).

[0052] The vibration reduction mechanism (50) of this embodiment has three elastic support portions (52). The elastic support portion (52) is disposed on or around each of the three top portions of the support plate (51). The elastic support portion (52) is disposed between the support plate (51) and the bottom plate (23). The elastic support portion (52) directly supports the support plate (51) from below. The elastic support portion (52) is made of rubber or urethane. The vibration of the compressor (12) is reduced by the elastic support portion (52) before being transmitted to the bottom plate (23).

[0053] In this embodiment, the cylinder (71) of the filling unit (70) is not supported by the support plate (51) and is fixed on the bottom plate (23).(3-6) Sound Insulation Member

[0054] The sound insulation member (60) reduces propagation of the noise generated when the compressor (12) is operating to the outside of the casing (21). The sound insulation member (60) is formed in a hollow box shape which is opened downward. The sound insulation member (60) has an upper wall (61), a right wall (62), a left wall (63), a front wall (64), and a rear wall (65). The upper wall (61) faces the top plate (22) and forms the upper surface of the sound insulation member (60). The right wall (62) faces the right plate (24) and forms the right surface of the sound insulation member (60). The left wall (63) faces the partitioning member (45) and forms the left surface of the sound insulation member (60). The front wall (64) faces the front plate (26) and forms the front surface of the sound insulation member (60). The rear wall (65) faces the rear plate (27) and forms the rear surface of the sound insulation member (60). The front wall (64) is attachable to and detachable from the body of the sound insulation member (60).

[0055] The sound insulation member (60) is supported by the bottom plate (23) of the casing (21). The sound insulation member (60) is a non-porous member. The sound insulation member (60) is comprised of, for example, metallic plate members or rubber sheets.

[0056] The sound insulation member (60) forms an internal space (66) in which the compressor (12) is housed. The components such as the compressor (12), the accumulator (17), the water heat exchanger (15), and the filling unit (70) are disposed in the internal space (66) of this embodiment.

[0057] The sound insulation member (60) and the casing (21) are spaced apart from each other with a predetermined gap. In other words, a clearance (67) is formed between the outer surface of the sound insulation member (60) and the inner surface of the casing (21). The clearance (67) reduces propagation of the noise generated when the compressor (12) is operating to the outside of the casing (21).(3-7) Filling Unit

[0058] The filling unit (70) is disposed in the right side of the machine chamber (S2) and in the front side of the machine chamber (S2). The filling unit (70) has the cylinder (71), the connection pipe (72), the control valve (73), and a protection member (74).

[0059] The cylinder (71) stores a flammable refrigerant for filling the refrigerant circuit (11). The cylinder (71) is filled with a refrigerant in advance when the heat source apparatus (1) is shipped out. Thus, when the heat source apparatus (1) is stored or transported, the cylinder (71) stores a refrigerant. After the heat source apparatus (1) has been installed on a site, the refrigerant circuit (11) is filled with a refrigerant from the cylinder (71) before the heat source apparatus (1) starts operation. Accordingly, when the heat source apparatus (1) is in use, the cylinder (71) is empty.

[0060] The cylinder (71) is formed in a vertically-long hollow cylindrical shape of which the height is greater than the outer diameter. The cylinder (71) forms a hermetically-closed pressure-resistant container. The rigidity of the cylinder (71) is smaller than the rigidity of the compressor casing (12a).

[0061] As shown in FIG. 1 and FIG. 3, a discharge port (711) is formed in a lower portion of the cylinder (71). More precisely, the discharge port (711) is formed in a bottom portion of the cylinder (71). A flammable refrigerant has a relatively high density. The discharge port (711) disposed in a lower portion of the cylinder (71) can induce a refrigerant to discharge. In addition, when loading a refrigerant into the refrigerant circuit (11), it is possible to reduce the remains of the refrigerant in the cylinder (71).

[0062] The connection pipe (72) is a pipe through which a refrigerant in the cylinder (71) is injected into the refrigerant circuit (11). One end of the connection pipe (72) is connected to the bottom portion of the cylinder (71) and communicates with the inside of the cylinder (71). The other end of the connection pipe (72) is connected to the suction pipe (19). The connection pipe (72) is located below the cylinder (71).

[0063] The control valve (73) is provided in the connection pipe (72). The control valve (73) controls the opening degree of the connection pipe (72). The control valve (73) is an exemplary on-off valve that opens and closes the connection pipe (72). The control valve (73) is located below the cylinder (71).

[0064] The protection member (74) has a function of protecting the connection pipe (72) and the control valve (73). The protection member (74) further has a function of supporting the cylinder (71) from below. The protection member (74) is installed between the cylinder (71) and the upper surface (23a) of the bottom plate (23). The upper surface (23a) of the bottom plate (23) means the upper surface (23a) of the bottom plate (23) in the vertical direction. The protection member (74) has a partition wall (74a) surrounding the connection pipe (72) and the control valve (73) and a support (74c). The partition wall (74a) has an opening (74b) through which the control valve (73) inside the partition wall (74a) is exposed to the outside of the partition wall (74a).

[0065] The support (74c) is a component that resides between the bottom plate (23) of the casing (21) and the bottom surface of the cylinder (71) and that supports the cylinder (71). The lower portion of the support (74c) is fixed to the bottom plate (23). The cylinder (71) is fixed to the upper portion of the support (74c). The length of the support (74c) may be variable in the top-bottom direction so that the height of the cylinder (71) from the bottom plate (23) is adjustable.(3-8) Access Port

[0066] As shown in FIGS. 3 and 4, an access port (A) is formed in the front side of the casing (21). The front plate (26) is provided with a front panel (26a) that is attachable to and detachable from a body of the front plate (26). When the front panel (26a) is detached, the access port (A) is exposed to the outside of the casing (21). When the front wall (64) is detached from the sound insulation member (60), the components in the casing (21) are exposed to the outside of the casing (21). The compressor (12) and the cylinder (71) overlap with the access port (A) in the second direction. The operator in front of the casing (21) can access the compressor (12) and the cylinder (71) through the access port (A). The operator can do maintenance on the compressor (12) and can operate the control valve (73) through the opening (74b).(4) Plate Member

[0067] As shown in FIG. 2 to FIG. 5, the heat source apparatus (1) includes a plate member (81). The plate member (81) is a metallic member, for example. The plate member (81) has a flat plate shape and is disposed between the compressor (12) and the cylinder (71). The plate member (81) has a first surface (81a) and a second surface (81b) that is the back side of the first surface (81a). The first surface (81a) faces the compressor (12), and the second surface (81b) faces the cylinder (71). The plate member (81) is installed on the bottom plate (23) or the support plate (51). The plate member (81) is fixed to the bottom plate (23) or the support plate (51) with screws, for example. The plate member (81) does not necessarily have a flat shape in top view (see FIG. 8A), and may be curved as shown in FIG. 6A and FIG. 6B. As shown in FIG. 7A and FIG. 7B, the angle (θ) between the virtual line (H) connecting the center (12b) of the compressor (12) with the center (71a) of the cylinder (71) and the plate surface of the plate member (81) may be an acute angle or may be an obtuse angle in top view. The angle (θ) may be a right angle (see FIG. 8A).

[0068] According to the above configuration, as shown in FIG. 8A to FIG. 8C, even if the compressor (12) is detached from the bottom plate (23) (or the support plate (51)) and then the compressor (12) is displaced toward the cylinder (71), for example, due to the impact generated by the casing (21) being dropped (with the side surface (21a) ahead) and coming into contact with the ground, it is possible to reduce the momentum of the compressor (12) toward the cylinder (71) by the compressor (12) colliding with the plate member (81) before reaching the cylinder (71). Thus, thereafter, even if the compressor (12) collides with the cylinder (71) via the plate member (81), it is possible to reduce the impact which the cylinder (71) receives from the compressor (12). The arrow Z in the drawing indicates the direction in which the casing (21) is dropped with the side surface (21a) ahead.

[0069] As shown in FIG. 4, in top view (as viewed from top in the vertical direction), the shortest distance (V2) between the compressor (12) and the cylinder (71) may be smaller than the shortest distance (V1) between the cylinder (71) and the plate member (81) (V1 > V2). Thus, when the compressor (12) collides with the plate member (81), the plate member (81) can be deformed by using a space of the shortest distance (V2) greater than the shortest distance (V1) when being deformed in order to absorb the impact from the compressor (12). Thus, it is possible to effectively reduce the momentum of the compressor (12) toward the casing (21).(5) Variations

[0070] As shown in FIG. 9, the heat source apparatus (1) may include a box member (80). The box member (80) is a box-shaped member installed to cover the compressor (12). The box member (80) is, for example, a metallic member. FIG. 10A to FIG. 12A illustrate various forms of the box member (80) in top view. As shown in FIG. 10A to FIG. 12A, the box member (80) includes side plates (84) extending from both ends of the plate member (81) toward the compressor (12) and covers at least part of the compressor (12). As shown in FIG. 9 and FIG. 12A, the box member (80) may have a hollow quadrangular prism shape of which the bottom portion is an opening (80a). As shown in FIG. 9 and FIG. 12A, the box member (80) is fixed to the bottom plate (23) with screws, for example, while being placed on the bottom plate (23) so that the opening (80a) as the bottom portion of the box member (80) butts against the bottom plate (23). The compressor (12) is disposed in a space surrounded by the box member (80) and the bottom plate (23). The box member (80) is installed on the bottom plate (23) while covering the compressor (12) installed on the support plate (51). The compressor (12) is installed on the support plate (51), and the box member (80) and the cylinder (71) are installed on the bottom plate (23). Installing the compressor (12) includes installing the compressor (12) directly on something and installing the compressor (12) indirectly on something via the vibration reduction mechanism (50) or the like. Installing the cylinder (71) includes installing the cylinder (71) directly on something and installing the cylinder (71) indirectly on something via the support (74c) or the like. The box member (80) is installed on the bottom plate (23) while covering the compressor (12) and the support plate (51). The box member (80) includes the plate member (81). The plate member (81) is a plate member of the box member (80) located between the compressor (12) and the cylinder (71), and is part of the box member (80).

[0071] According to the above configuration, as shown in FIG. 12A to FIG. 12C, even if the compressor (12) is displaced toward the cylinder (71), for example, due to the impact generated by the casing (21) being dropped (with the side surface (21a) ahead) and coming into contact with the ground, it is possible to reduce the momentum of the compressor (12) toward the cylinder (71) by the compressor (12) colliding with the plate member (81) of the box member (80) before reaching the cylinder (71). Thus, it is possible to effectively absorb the impact from the compressor (12). Further, leakage of the driving noise of the compressor (12) to the outside can be reduced by the box member (80). Further, it is possible to prevent the refrigerant compressed by the compressor (12) from being blown out of the compressor (12) and deposited on components around the compressor (12).

[0072] As shown in FIG. 12A, the box member (80) has a hollow quadrangular prism shape and thus includes a plurality of corner portions (82), where the flat portion (the second surface (81b) of the plate member (81)) located between the corner portions (82) adjacent to each other faces the cylinder (71). Accordingly, even if the compressor (12) is displaced toward the cylinder (71), the flat portion (the second surface (81b) of the plate member (81)) collides with the cylinder (71), and thus it is possible to reduce the corner portion (82) of the box member (80) colliding with the cylinder (71) as shown in FIG. 13. As a result, it is possible to effectively protect the cylinder (71).

[0073] The height of the box member (80) from the bottom plate (23) may be greater than the height of the cylinder (71) from the bottom plate (23). Accordingly, even if the compressor (12) collides with the box member (80) by being displaced toward the cylinder (71), and then the compressor (12) and the box member (80) are displaced toward the cylinder (71) together, a side portion of the box member (80) collides with the cylinder (71). Thus, it is possible to prevent the corner portion (82) at the upper end of the box member (80) from colliding with the cylinder (71). As a result, when the box member (80) collides with the cylinder (71), it is possible to reduce an increase in the pressure applied from the box member (80) to the cylinder (71), and thus it is possible to reduce damage to the cylinder (71).

[0074] As shown in FIG. 14A, the compressor (12) and the cylinder (71) may be installed on the support plate (51), and the box member (80) may be installed on the bottom plate (23). In this case, for example, the box member (80) has a greater dimension in the second direction (the depth direction in FIG. 10A) than the support plate (51); the side surfaces of the box member (80) that face each other in the first direction (the left-right direction in the FIG. 14A) have through holes (83a, 83b); and the support plate (51) passes through the through holes (83a, 83b) in the first direction. Accordingly, the box member (80) is installed on the bottom plate (23) while covering the compressor (12) installed on the support plate (51).

[0075] As shown in FIG. 14B, the compressor (12), the box member (80), and the box member (80) may be installed on the support plate (51). In this case, the box member (80) is fixed to the support plate (51) with screws, for example, while being placed on the support plate (51) so that the opening (80a) as the bottom portion of the box member (80) butts against the support plate (51). The compressor (12) is disposed in a space surrounded by the box member (80) and the support plate (51). According to the above configuration, the compressor (12) and the box member (80) covering the compressor (12) are installed on the same member (the support plate (51)), and thus it is unnecessary to upsize the box member (80) in order to cover the support plate (51). As a result, it is possible to downsize the box member (80). Further, by downsizing the box member (80), it is possible to increase the space between the box member (80) and the cylinder (71). The increased space can be used for the box member (80) to be deformed when being deformed by receiving the impact from the compressor (12), and thus it is possible to effectively absorb the impact from the compressor (12).

[0076] The box member (80) may include a cushioning member. For example, the first surface (81a) of the plate member (81) of the box member (80) is provided with the cushioning member. For example, the cushioning member is made of a resin material with continuous bubbles, such as urethane. Accordingly, even if the compressor (12) is displaced toward the cylinder (71), the box member (80) can effectively absorb the impact from the compressor (12) by using the cushioning member.

[0077] The box member (80) may function as a sound insulation member. The compressor (12) is disposed in a closed space surrounded by the box member (80) and the bottom plate (23) or the support plate (51), whereby it is possible to reduce leakage of the driving noise of the compressor (12) from that closed space to the outside of the box member (80). A sound absorbing member may be installed on the inner surface of the box member (80). For example, the sound absorbing member is made of a resin material with continuous bubbles, such as urethane.

[0078] It will be understood that the embodiments and variations described above can be modified with various changes in form and details without departing from the spirit and scope of the claims. The elements according to embodiments, the variations thereof, and the other embodiments may be combined and replaced with each other. In addition, the expressions of "first," "second," "third," . . . , in the specification and claims are used to distinguish the terms to which these expressions are given, and do not limit the number and order of the terms.INDUSTRIAL APPLICABILITY

[0079] As described above, the present disclosure is useful for a heat source apparatus.DESCRIPTION OF REFERENCE CHARACTERS

[0080] 1Heat Source Apparatus 11Refrigerant Circuit 12Compressor 15Water Heat Exchanger 21Casing 23Bottom Plate 71Cylinder 80Box Member 81Plate Member

Claims

1. A heat source apparatus comprising: 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).

2. The heat source apparatus of claim 1, wherein in top view, a shortest distance (V2) between the compressor (12) and the plate member (81) is smaller than a shortest distance (V1) between the cylinder (71) and the plate member (81).

3. The heat source apparatus of claim 1 or 2, further comprising: a box member (80) covering the compressor (12), wherein the plate member (81) is part of the box member (80).

4. The heat source apparatus of claim 3, wherein the box member (80) includes a plurality of corner portions (82) and a flat portion (81b) located between the corner portions (82) adjacent to each other, and the flat portion (81b) faces the cylinder (71).

5. The heat source apparatus of claim 3, wherein a height of the box member (80) from the bottom plate (23) is greater than a height of the cylinder (71) from the bottom plate (23).

6. The heat source apparatus of claim 3, wherein the compressor (12) is installed on a support plate (51) provided above the bottom plate (23), and the box member (80) is installed on the bottom plate (23).

7. The heat source apparatus of claim 3, wherein the compressor (12) and the box member (80) are installed on a support plate (51) provided above the bottom plate (23).

8. The heat source apparatus of any one of claims 3 to 7, further comprising: a cushioning member installed on the box member (80).

9. The heat source apparatus of any one of claims 3 to 7, wherein the box member (80) functions as a sound insulation member.

10. The heat source apparatus of any one of claims 3 to 7, further comprising: a sound absorbing member installed on the box member (80).

Images