Heat source device

Abstract

This heat source device comprises: a cylinder (71) having a discharge port (71a) in the lower part thereof; a fan (30) for conveying air that exchanges heat with an air heat exchanger (13); and a casing (21) including a compressor (12), the air heat exchanger (13), and a bottom plate (23) on which the cylinder (71) is installed. The heat source device additionally comprises, inside of the casing (21), a partition member (45) for demarcating a first chamber (S1) in which the air heat exchanger (13) and the fan (30) are accommodated, and a second chamber (S2) in which the compressor (12) and the cylinder (71) are accommodated. The cylinder (71) is positioned closer to the first chamber (S1) than the compressor (12).

Description

heat source device

[0001] The present disclosure relates to a heat source device.

[0002] Patent Document 1 discloses a heat source device including a compressor connected to a refrigerant circuit. The compressor is installed on a bottom plate within a casing of the heat source device.

[0003] JP 2013-155921 A

[0004] The present inventors have devised a configuration in which a cylinder is provided within the casing of a heat source device. The cylinder stores a flammable refrigerant to be filled into the refrigerant circuit. This allows the refrigerant circuit to be filled with refrigerant from the cylinder when the heat source device is installed, eliminating the need to separately prepare refrigerant for filling. However, the following unique problems arise when using a flammable refrigerant and providing a cylinder within the casing.

[0005] During transportation of the heat source device to the site for installation, there is a risk that the casing may fall. The casing contains a compressor and a gas cylinder. If the compressor collides with the gas cylinder due to the impact of the falling casing, the gas cylinder may be damaged, potentially causing a flammable refrigerant leak into the air.

[0006] An object of the present disclosure is to prevent damage to the cylinder when the casing is dropped.

[0007] The first aspect relates to a heat source device, and the heat source device includes a compressor (12) and an air heat exchanger (13) included in a refrigerant circuit (11) that performs a refrigeration cycle, a cylinder (71) that stores a flammable refrigerant to be filled into the refrigerant circuit (11) and has a discharge port (71a) at its bottom for discharging the flammable refrigerant, a fan (30) that transports air that exchanges heat with the air heat exchanger (13), a casing (21) that has a bottom plate (23) on which the compressor (12), the air heat exchanger (13), and the cylinder (71) are placed, and a partition member (45) that divides the interior 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 located closer to the first chamber (S1) than the compressor (12).

[0008] In the first aspect, the cylinder (71) disposed in the second chamber (S2) is located closer to the first chamber (S1) than the compressor (12). Under conditions where the casing (21) falls to the ground from the first chamber (S1) side, the cylinder (71) is located lower than the compressor (12). Therefore, there is a possibility that the compressor (12) will collide with the cylinder (71). However, under these conditions, a portion of the bottom plate (23) of the casing (21) located in the first chamber (S1) will collide with the ground before the cylinder (71). When the bottom plate (23) collides with the ground, the bottom plate (23) is deformed. As a result, the kinetic energy of the compressor (12) can be absorbed by the deformation of the bottom plate (23), thereby reducing the impact when the compressor (12) collides with the cylinder (71).

[0009] In the second aspect, in the first aspect, a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the first chamber (S1) in a top view of the bottom plate (23).

[0010] In the second aspect, when the first line (L1) is oriented in the direction of gravity and the casing (21) falls to the ground from the first chamber (S1) side, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer. This increases the amount of deformation of the bottom plate (23) when it collides with the ground, thereby reducing the impact when the compressor (12) collides with the cylinder (71).

[0011] In the third aspect, in the first or second aspect, when viewed from above the bottom plate (23), a first line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the air heat exchanger (13).

[0012] In the third aspect, when the casing (21) falls to the ground from the first chamber (S1) side with the first straight line oriented in the direction of gravity, the cylinder (71) collides with the air heat exchanger (13). This allows the air heat exchanger (13) to absorb the impact of the cylinder (71) colliding with the ground. As a result, damage to the cylinder (71) can be suppressed.

[0013] In a fourth aspect, in any one of the first to third aspects, when viewed from above the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the partition member (45).

[0014] In the fourth aspect, when the casing (21) falls to the ground from the first chamber (S1) side with the first line (L1) oriented in the direction of gravity, the cylinder (71) collides with the partition member (45). This allows the partition member (45) to absorb the impact of the cylinder (71) colliding with the ground. As a result, damage to the cylinder (71) can be suppressed.

[0015] In a fifth aspect, in any one of the first to fourth aspects, a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the fan (30) in a top view of the bottom plate (23).

[0016] In the fifth aspect, when the casing (21) falls to the ground from the first chamber (S1) side with the first line (L1) oriented in the direction of gravity, the cylinder (71) collides with the fan (30). This allows the fan (30) to absorb the impact of the cylinder (71) colliding with the ground. As a result, damage to the cylinder (71) can be suppressed.

[0017] In a sixth aspect, in any one of the first to fifth aspects, the bottom plate (23) has a first side edge (23c) and a second side edge (23d) extending along the first chamber (S1) and the second chamber (S2), and a third side edge (23b) located on the first chamber (S1) side and continuous with the first side edge (23c) and the second side edge (23d). In a top view of the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the third side edge (23b).

[0018] In the sixth aspect, when the casing (21) falls from the first chamber (S1) side to the ground with the first straight line (L1) oriented in the direction of gravity, the third side edge (23b) farther from the cylinder (71) collides with the ground (G). This increases the amount of deformation of the bottom plate (23) when it collides with the ground, thereby reducing the impact when the compressor (12) collides with the cylinder (71).

[0019] In the seventh aspect, in the sixth aspect, the intersection of the first straight line (L1) and the third side edge (23b) is located on the opposite side of the center line (M) perpendicular to the third side edge (23b) from the center of gravity of the cylinder (71) in top view.

[0020] In the seventh aspect, when the casing (21) falls from the first chamber (S1) side to the ground with the first straight line (L1) oriented in the direction of gravity, the portion of the third side edge (23b) that comes into contact with the ground is located on the opposite side of the center line (M) from the center of gravity of the cylinder (71). This increases the distance of the bottom plate (23) from the ground (G) to the cylinder (71), thereby increasing the amount of deformation of the bottom plate (23) when it hits the ground.

[0021] In the eighth aspect, in the sixth or seventh aspect, the first position (P1) is defined as the position of the intersection of the first line (L1) and the third side edge (23b) when viewed from above the bottom plate (23). The second position (P2) is defined as the midpoint of the third side edge (23b). The third position (P3) is defined as the positions of the ends (E1, E2) of the third side edge (23b) when viewed from above the bottom plate (23). The distance between the first position (P1) and the third position (P3) is shorter than the distance between the first position (P1) and the second position (P2).

[0022] In the eighth aspect, when the casing (21) falls from the first chamber (S1) side to the ground with the first straight line (L1) oriented in the direction of gravity, a portion of the third side edge (23b) near the ends (E1, E2) hits the ground. This increases the distance of the bottom plate (23) from the ground (G) to the cylinder (71), thereby increasing the amount of deformation of the bottom plate (23) when it hits the ground.

[0023] A ninth aspect is any one of the sixth to eighth aspects, wherein the longitudinal length of the bottom plate (23) in the first chamber (S1) is greater than the longitudinal length of the bottom plate (23) in the second chamber (S2).

[0024] In the ninth aspect, when the casing (21) falls to the ground first, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) is increased because the length of the first chamber (S1) in the longitudinal direction, in other words, the length of the first chamber (S1) and the second chamber (S2) in the arrangement direction, is greater than the length of the second chamber (S2) in the longitudinal direction. As a result, the amount of deformation of the bottom plate (23) when it hits the ground can be increased.

[0025] FIG. 1 is a schematic piping diagram of a refrigerant circuit of a heat source device according to an embodiment. FIG. 2 is a schematic perspective view of an outdoor unit. FIG. 3 is a front view of the outdoor unit, showing the state in which the front access opening of the machine chamber is open. FIG. 4 is a plan view schematically illustrating the interior of the outdoor unit. FIG. 5 is a side view of the interior of the outdoor unit, viewed from the right side with the side panel removed. FIG. 6 is a top view of the interior of the outdoor unit, showing a schematic diagram illustrating the positional relationship between the compressor, the cylinder, and the side edges. FIG. 7 is a schematic diagram illustrating the positional relationship between the compressor, the cylinder, and the side edges of a casing of a comparative example heat source device when dropped under a first condition. FIG. 8 is a schematic diagram illustrating the positional relationship between the compressor, the cylinder, and the side edges of a casing of an embodiment when dropped under a first condition. FIG. 9 is a schematic diagram illustrating the positional relationship between the compressor, the cylinder, and the side edges of a casing of an embodiment when dropped under a second condition. FIG. 10 is a view corresponding to FIG. 6 of a heat source device according to a first modification. Fig. 11 is a diagram corresponding to Fig. 6 of a heat source device of Modification 2. Fig. 12 is a diagram corresponding to Fig. 6 of a heat source device of Modification 3. Fig. 13 is a diagram corresponding to Fig. 6 of a heat source device of Modification 4.

[0026] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical concept of the present disclosure. Since the drawings are intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding.

[0027] (1) Basic Configuration of the Heat Source Device The heat source device (1) of this embodiment constitutes a refrigeration cycle device that performs a refrigeration cycle. The refrigeration cycle device is applied to a hot water supply system. The heat source device (1) heats water and supplies the heated water to an object. The heat source device (1) has an outdoor unit (20) installed outdoors. The outdoor unit (20) has a casing (21). The casing (21) accommodates the entire refrigerant circuit (11), which is a closed circuit. The refrigerant circuit (11) is filled with refrigerant. The refrigerant circuit (11) performs a refrigeration cycle.

[0028] The refrigerant in the refrigerant circuit (11) is a flammable refrigerant. Specifically, the refrigerant in this embodiment is propane (R290), a highly flammable natural refrigerant. Natural refrigerants have an ozone depletion potential of zero, a low global warming potential, and a low environmental impact. Propane ignites at temperatures of 500°C or lower.

[0029] The flammable refrigerant may be methane (R50), ethane (R170), butane (R600), isobutane (R600a). The natural refrigerant may be a corrosive refrigerant, for example ammonia (R717).

[0030] (1-1) Refrigerant Circuit As shown in Fig. 1, the refrigerant circuit (11) includes, as its main components, a compressor (12), an air heat exchanger (13), an expansion valve (14), a water heat exchanger (15), and a cylinder (71). The refrigerant circuit (11) further includes a four-way switching valve (16) and an accumulator (17).

[0031] The compressor (12) compresses the refrigerant. A discharge pipe (18) is connected to the discharge side of the compressor (12), and a suction pipe (19) is connected to the suction side of the compressor (12). The air heat exchanger (13) exchanges heat between the refrigerant and outdoor air. The expansion valve (14) reduces the pressure of the refrigerant. The water heat exchanger (15) exchanges heat between the refrigerant in the refrigerant circuit (11) and water in the water circuit (40). The four-way selector valve (16) switches the circulation direction of the refrigerant. The four-way selector valve (16) is switched between a first state (shown by a solid line in FIG. 1) in which the first port (16a) and the third port (16c) communicate with each other and simultaneously the second port (16b) and the fourth port (16d) communicate with each other, and a second state (shown by a dashed line in FIG. 1) in which the first port (16a) and the second port (16b) communicate with each other and simultaneously the third port (16c) and the fourth port (16d) communicate with each other. The accumulator (17) accumulates liquid in the refrigerant sucked into the compressor (12).

[0032] The cylinder (71) is connected to the refrigerant circuit (11) via a connecting pipe (72). In this embodiment, the connecting pipe (72) is connected to the suction pipe (19). A control valve (73) is provided on the connecting pipe (72). The cylinder (71) is filled with refrigerant before shipping the heat source device (1). After transporting the heat source device (1) to the site, an operator depressurizes the refrigerant circuit (11). Thereafter, when the operator opens the control valve (73), the refrigerant from the cylinder (71) is filled into the refrigerant circuit (11).

[0033] The refrigerant circuit (11) performs a first refrigeration cycle and a second refrigeration cycle. In Fig. 1, the flow of refrigerant in the first refrigeration cycle is indicated by solid arrows, and the flow of refrigerant in the second refrigeration cycle is indicated by dashed arrows. In the first refrigeration cycle, the four-way selector valve (16) is in the first position, and the water heat exchanger (15) functions as a radiator (condenser) while the air heat exchanger (13) functions as an evaporator. In the second refrigeration cycle, the four-way selector valve (16) is in the second position, and the air heat exchanger (13) functions as a radiator (condenser) while the water heat exchanger (15) functions as an evaporator.

[0034] (1-2) Water Circuit 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). A pump (43) is connected to the water circuit (40). The pump (43) transports water in the water circuit (40). The water in the water circuit (40) is supplied to a hot water tank, an air conditioning unit, a floor heating unit, or other such devices. A gas-liquid separator (44) is connected to the water circuit (40). The gas-liquid separator (44) releases refrigerant leaked from the refrigerant circuit (11) through the water heat exchanger (15) into the atmosphere.

[0035] (2) Outdoor Unit The configuration of the outdoor unit (20) will be described in detail with reference to FIGS. 2 to 5. In the following description, terms such as "upper," "lower," "right," "left," "front," and "rear" refer to the directions indicated by the arrows in FIG. 2. The outdoor unit (20) has a casing (21), components of a refrigerant circuit (11), and components of a water circuit (40). The components of the refrigerant circuit (11) include, in addition to the above-mentioned elements, refrigerant piping, a solenoid valve, an internal heat exchanger, a filter, piping insulation, and the like. The outdoor unit (20) has a partition member (45) that partitions the casing (21) and a fan (30) that transports outdoor air.

[0036] (2-1) Casing and Partition Member The casing (21) is installed outdoors. The casing (21) is formed in a hollow box shape. Strictly speaking, the casing (21) is formed in a box shape with a portion of the left and rear faces open. The casing (21) is formed in a rectangular parallelepiped shape with the first direction (left-right direction) as the longitudinal direction and the second direction (front-rear direction) as the lateral direction. The casing (21) is made of a metal plate material. 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 toward the front of the casing (21) and is continuous with the front plate (26). The rear plate (27) is located toward the right of the casing (21) and is continuous with the right plate (24).

[0037] A partition member (45) is provided inside the casing (21). The partition member (45) extends from the bottom plate (23) to the top plate (22). The partition member (45) extends in the front-to-rear direction in a top view. The partition member (45) divides the interior of the casing (21) into a fan chamber (S1) which is a first chamber and a machine chamber (S2) which is 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).

[0038] The casing (21) is formed with an inlet (28) and an outlet (29). The inlet (28) is formed in the casing (21) from the rear surface of the fan chamber (S1) to the left surface. The outlet (29) is formed in the front plate (26) of the casing (21) in a portion in front of the fan chamber (S1). In the fan chamber (S1), a flow path through which outdoor air flows is formed from the inlet (28) to the outlet (29).

[0039] (2-2) Configuration of the Fan Chamber The fan chamber (S1) is formed as a substantially rectangular parallelepiped space. The length of the fan chamber (S1) in the first direction is greater than the length of the fan chamber (S1) in the second direction. The fan chamber (S1) is provided with an air heat exchanger (13), a fan (30), and a bell mouth (31).

[0040] The air heat exchanger (13) is formed in an L-shape when viewed from above. The air heat exchanger (13) has a first heat exchange section (13a) along the rear surface of the fan chamber (S1) and a second heat exchange section (13b) along the left surface of the fan chamber (S1). The air heat exchanger (13) is a fin-and-tube heat exchanger. The heat transfer tubes of the air heat exchanger (13) are formed of flat multi-hole tubes, but may also be straight tubes.

[0041] The fan (30) is a propeller fan having a motor (30a) and an impeller (30b). The motor (30a) is located rearward of the impeller (30b). The motor (30a) is supported by a support base (32) attached to the bottom plate (23). The motor (30a) drives and rotates the impeller (30b). The bell mouth (31) is cylindrical and formed around the impeller (30b). The bell mouth (31) is continuous with the air outlet (29).

[0042] A portion of the air heat exchanger (13) of this embodiment extends to the machine room (S2). The first heat exchange section (13a) is located rearward of the partition member (45). The first heat exchange section (13a) extends rightward so as to pass through a space behind the rear end of the partition member (45). The right end of the first heat exchange section (13a) is located in the machine room (S2).

[0043] (3) Configuration of the Machine Room The machine room (S2) is formed as a substantially rectangular parallelepiped space. The length of the machine room (S2) in the first direction is approximately equal to the length of the machine room (S2) in the second direction. The length of the machine room (S2) in the third direction (vertical direction) is greater than the lengths of the machine room (S2) in the first and second directions. The length of the machine room (S2) in the first direction is smaller than the length of the fan room (S1) in the first direction. A compressor (12), a water heat exchanger (15), a gas-liquid separator (44), and an accumulator (17) are disposed in the machine room (S2). The outdoor unit (20) further includes a vibration isolation mechanism (50), a sound insulation member (60), and a filling unit (70).

[0044] (3-1) Compressor The compressor (12) is disposed near the front and right side of the machine room (S2). The compressor (12) has a cylindrical compressor casing (12a). The compressor casing (12a) is formed in the shape of a vertically elongated hollow cylinder whose height is greater than its outer diameter. The compressor casing (12a) constitutes a sealed pressure-resistant container. A suction pipe (19) is connected to the top of the compressor (12). A discharge pipe (18) is connected to the body of the compressor (12). The compressor (12) is, for example, a scroll compressor.

[0045] (3-2) Water Heat Exchanger The water heat exchanger (15) is disposed on the right side of the machine room (S2). The water heat exchanger (15) is closer to the right plate (24) than the compressor (12). The water heat exchanger (15) is closer to the rear plate (27) than the compressor (12). The water heat exchanger (15) is a plate-type heat exchanger. A first water pipe (41), a second water pipe (42), and a refrigerant pipe (not shown) are connected to the water heat exchanger (15).

[0046] (3-3) Gas-Liquid Separator 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 discharge path for discharging the gas refrigerant separated therein and a gas vent valve for opening and closing the discharge path (not shown).

[0047] (3-4) Accumulator The accumulator (17) is connected to the suction pipe (19). The accumulator (17) is disposed toward the rear of the machine room (S2). The accumulator (17) is formed in the shape of a vertically elongated hollow cylinder whose height is greater than its outer diameter.

[0048] (3-5) Vibration Isolation Mechanism The vibration isolation mechanism (50) suppresses vibration of the compressor (12) and the accumulator (17). The vibration isolation mechanism (50) of this embodiment includes a support plate (51) that supports the compressor (12) from below, and an elastic support part (52) that is fixed on the bottom plate (23) and supports the support plate (51) from below.

[0049] The compressor (12) is fixed on a support plate (51). The support plate (51) is a plate member having a substantially triangular shape when viewed from above. A circular hole is formed in the center of the support plate (51) into which the bottom of the compressor (12) fits.

[0050] The vibration-proof mechanism (50) of this embodiment has three elastic support members (52). Each elastic support member (52) is disposed near one of the three tops of the support plate (51). The elastic support members (52) are disposed between the support plate (51) and the bottom plate (23). The elastic support members (52) directly support the support plate (51) from below. The elastic support members (52) are made of rubber or urethane. Vibrations of the compressor (12) are attenuated by the elastic support members (52) before being transmitted to the bottom plate (23).

[0051] In this embodiment, the cylinder (71) of the filling unit (70) is not supported by the support plate (51) but is fixed on the bottom plate (23).

[0052] (3-6) Sound Insulation Member The sound insulation member (60) prevents noise generated during operation of the compressor (12) from propagating to the outside of the casing (21). The sound insulation member (60) is formed in the shape of a hollow box that is open at the bottom. 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 constitutes the upper surface of the sound insulation member (60). The right wall (62) faces the right plate (24) and constitutes the right surface of the sound insulation member (60). The left wall (63) faces the partition member (45) and constitutes the left surface of the sound insulation member (60). The front wall (64) faces the front plate (26) and constitutes the front surface of the sound insulation member (60). The rear wall (65) faces the rear plate (27) and constitutes the rear surface of the sound insulating member (60). The front wall (64) is detachable from the main body of the sound insulating member (60).

[0053] The sound insulating member (60) is supported on the bottom plate (23) of the casing (21). The sound insulating member (60) is made of an air-impermeable material, such as a metal plate or a rubber sheet.

[0054] The sound insulating member (60) defines an internal space (66) for accommodating the compressor (12). In the internal space (66) of this embodiment, devices such as the compressor (12), the accumulator (17), the water heat exchanger (15), and the filling unit (70) are arranged.

[0055] The sound insulating member (60) and the casing (21) are disposed with a predetermined gap therebetween. In other words, a gap (67) is formed between the outer surface of the sound insulating member (60) and the inner surface of the casing (21). This gap (67) prevents noise generated during operation of the compressor (12) from being transmitted to the outside of the casing (21).

[0056] (3-7) Charging Unit The charging unit (70) is disposed to the left of the machine room (S2) and toward the front of the machine room (S2). The charging unit (70) includes a cylinder (71), a connecting pipe (72), a control valve (73), and a protective member (74).

[0057] The cylinder (71) stores a flammable refrigerant to be filled into the refrigerant circuit (11). The cylinder (71) is filled with the refrigerant before shipping the heat source device (1). Therefore, the cylinder (71) contains the refrigerant during storage or transportation of the heat source device (1). After the heat source device (1) is installed on-site, the refrigerant is filled into the refrigerant circuit (11) from the cylinder (71) before operation of the heat source device (1). Therefore, the cylinder (71) is empty when the heat source device (1) is in use.

[0058] The cylinder (71) is formed in the shape of a vertically elongated hollow cylinder whose height is greater than its outer diameter. The cylinder (71) constitutes a sealed pressure-resistant container. The rigidity of the cylinder (71) is less than the rigidity of the compressor casing (12a). The weight of the cylinder (71) is less than the weight of the compressor (12).

[0059] As shown in FIGS. 1 and 3 , a discharge port (71a) is formed in the lower part of the cylinder (71). Strictly speaking, the discharge port (71a) is formed in the bottom part of the cylinder (71). Flammable refrigerants have a relatively high density. By locating the discharge port (71a) in the lower part of the cylinder (71), it is possible to promote the discharge of the refrigerant. In addition, it is possible to prevent the refrigerant from remaining in the cylinder (71) when the refrigerant circuit (11) is filled with the refrigerant.

[0060] The connecting pipe (72) is a pipe for injecting the refrigerant from the cylinder (71) into the refrigerant circuit (11). One end of the connecting pipe (72) is connected to the outlet (71a) of the cylinder (71) and communicates with the interior of the cylinder (71). The other end of the connecting pipe (72) is connected to the suction pipe (19). The connecting pipe (72) is located below the cylinder (71).

[0061] The control valve (73) is provided on the connecting pipe (72). The control valve (73) adjusts the opening degree of the connecting pipe (72). The control valve (73) is an example of an on-off valve that opens and closes the connecting pipe (72). The control valve (73) is located below the cylinder (71).

[0062] The protective member (74) has a function of protecting the connecting pipe (72) and the regulating valve (73). The protective member (74) also has a function of supporting the cylinder (71) from below. The protective member (74) has a partition wall (74a) that surrounds the connecting pipe (72) and the regulating valve (73). The partition wall (74a) has an opening (74b) that exposes the regulating valve (73) located therein to the outside of the partition wall (74a).

[0063] (3-8) Access Port As shown in FIGS. 3 and 4, an access port (A) is formed on the front side of the casing (21). The front plate (26) is provided with a front panel (26a) that is detachable from the main body. By removing the front panel (26a), the access port (A) is exposed to the outside of the casing (21). By removing the front wall (64) from the sound-proofing member (60), the internal equipment of the casing (21) is 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. A worker on the front side of the casing (21) can access the compressor (12) and the cylinder (71) through the access port (A). The worker can perform maintenance on the compressor (12) and operate the control valve (73) through the opening (74b).

[0064] (4) Characteristics of the Arrangement of the Bottom Plate, Compressor, and Cylinder The compressor (12) and the cylinder (71) are installed directly or indirectly on the bottom plate (23). The arrangement of the bottom plate (23), the compressor (12), and the cylinder (71) will be described in detail with reference to Fig. 6. Fig. 6 is a schematic diagram of the bottom plate (23) of the casing as viewed from above. For convenience, some components are not shown in Fig. 6.

[0065] (4-1) Configuration of the Bottom Plate The bottom plate (23) is formed in a substantially rectangular shape with the first direction as the longitudinal direction. The bottom plate (23) has four side edges. The four side edges are a right edge (23a) formed on the right side, a left edge (23b) formed on the left side, a front edge (23c) formed in front of the right edge, and a rear edge (23d) formed behind the right edge. The front edge (23c) constitutes the first side edge as a long side, and the rear edge (23d) constitutes the second side edge as a long side. The left edge (23b) constitutes the third side edge as a short side, and the right edge (23a) constitutes the fourth side edge as a short side.

[0066] The left side (23b) of the bottom plate (23) has a first end (E1) and a second end (E2). The first end (E1) is the front end of the left side (23b). The second end (E2) is the rear end of the left side (23b). In this embodiment, the first end (E1) forms a first corner where the left side (23b) and the front side (23c) are continuous. The second end (E2) forms a second corner where the left side (23b) and the rear side (23d) are continuous.

[0067] (4-2) Arrangement Relationship As shown in FIG. 6 , the cylinder (71) is closer to the fan chamber (S1) than the compressor (12). In other words, the distance from the cylinder (71) to the fan chamber (S1) is shorter than the distance from the compressor (12) to the fan chamber (S1). In the casing (21), the compressor (12), the cylinder (71), and the fan chamber (S1) are arranged in this order in the first direction. In this embodiment, the compressor (12) and the cylinder (71) overlap each other in the first direction.

[0068] In FIG. 6 , the first center of gravity (C1) is the center of gravity of the compressor (12) in a top view of the bottom plate (23). The second center of gravity (C2) is the center of gravity of the cylinder (71) in a top view of the bottom plate (23). The "top view of the bottom plate (23)" here refers to the bottom plate (23) viewed from above in an installed state of the heat source device (1). The "center of gravity" here refers to the center of mass of the bottom plate (23) in a top view or the center of mass in the horizontal direction. The "center of gravity" is not the center of mass in the vertical direction. In FIG. 6 , the first line (L1) is a line that overlaps the first center of gravity (C1) of the compressor (12) and the second center of gravity (C2) of the cylinder (71) in a top view of the bottom plate (23). The center line (M) is a line that is perpendicular to the left side (23b) in a top view. Strictly speaking, the center line (M) is a straight line that overlaps the midpoint of the left side (23b) and is perpendicular to the left side (23b). In FIG. 6, the first position (P1) is the intersection of the first straight line (L1) and the left side (23b) in a top view. The second position (P2) is the midpoint of the left side (23b) in a top view. The third position (P3) is the position of an end of the left side (23b). Strictly speaking, the third position (P3) is the end of the left side (23b) that is closer to the first position (P1). In this example, the third position (P3) is the first end (E1) of the left side (23b).

[0069] The first straight line (L1) overlaps with the fan chamber (S1) in a top view of the bottom plate (23). When viewed in the direction in which the first straight line (L1) extends, the compressor (12), the cylinder (71), and the fan chamber (S1) overlap with each other.

[0070] The first straight line (L1) overlaps with the partition member (45) in a top view of the bottom plate (23). When viewed in the direction in which the first straight line (L1) extends, the compressor (12), the cylinder (71), and the partition member (45) overlap with each other.

[0071] The first straight line (L1) overlaps with the fan (30) when viewed from above the bottom plate (23). When viewed in the direction in which the first straight line (L1) extends, the compressor (12), the cylinder (71), and the fan (30) overlap with each other.

[0072] The first straight line (L1) overlaps with the left side (23b) which is the third side edge in a top view of the bottom plate (23). When viewed in the direction in which the first straight line (L1) extends, the compressor (12), the cylinder (71), and the left side (23b) overlap with each other.

[0073] The first position (P1) is closer to the third position (P3) than the second position (P2). In other words, the first position (P1) is located closer to the first end (E1) on the left side (23b).

[0074] A first length (a) in the longitudinal direction (first direction) of the bottom plate (23) in the fan chamber (S1) is greater than a second length (b) in the longitudinal direction (first direction) of the bottom plate (23) in the machine chamber (S2).

[0075] (4-3) Problems when the casing falls The heat source device (1) accommodates a cylinder (71) inside the casing (21). The cylinder (71) stores propane, which is a flammable natural refrigerant. When the heat source device (1) is transported, there is a possibility that the casing (21) may fall.

[0076] FIG. 7 shows a comparative example of a heat source device. In the comparative example of a heat source device, the compressor (12) is closer to the machine room (S2) than the cylinder (71). In this configuration, if the casing (21) falls from the machine room (S2) side to the ground (G), the compressor (12) is located above the cylinder (71). Therefore, if the casing (21) hits the ground (G), the compressor (12) moves in the direction of gravity, colliding with the cylinder (71), which may result in damage to the cylinder (71). In particular, the compressor (12) is more rigid and heavier than the cylinder (71). This may increase the risk of damage to the cylinder (71).

[0077] (4-4) Actions of the Casing in the Present Embodiment When Dropped The actions of the casing (21) in the present embodiment when dropped under the following first and second conditions will be described.

[0078] As shown in FIG. 8(A), the first condition is a condition under which the casing (21) falls from the machine room (S2) side to the ground (G). In this embodiment, the cylinder (71) is closer to the fan chamber (S1) than the compressor (12). Therefore, under the first condition, the cylinder (71) is located above the compressor (12). Therefore, as shown in FIG. 8(B), even if the casing (21) collides with the ground (G) and the compressor (12) moves downward, the compressor (12) will hardly collide with the cylinder (71). Therefore, damage to the cylinder (71) due to the compressor (12) colliding with the cylinder (71) can be suppressed.

[0079] As shown in FIG. 9(A), the second condition is a condition in which the casing (21) falls from the fan chamber (S1) side to the ground (G). Under the second condition, the cylinder (71) is located below the compressor (12). Therefore, there is a possibility that the compressor (12) will collide with the cylinder (71). However, under this condition, as shown in FIG. 9(B), a portion of the bottom plate (23) of the casing (21) located in the fan chamber (S1) will collide with the ground before the cylinder (71). When the bottom plate (23) collides with the ground, the bottom plate (23) is deformed. As a result, the kinetic energy of the compressor (12) can be absorbed by the deformation of the bottom plate (23), thereby reducing the impact when the compressor (12) collides with the cylinder (71).

[0080] (5) Effects of the Embodiment (5-1) In the present embodiment, the cylinder (71) is located closer to the fan chamber (S1) than the compressor (12). In the second condition where the casing (21) falls to the ground from the fan chamber (S1) side, the cylinder (71) is located lower than the compressor (12). Therefore, there is a possibility that the compressor (12) will collide with the cylinder (71). However, in this condition, a portion of the bottom plate (23) of the casing (21) located in the fan chamber (S1) will collide with the ground before the cylinder (71). When the bottom plate (23) collides with the ground, the bottom plate (23) is deformed. As a result, the kinetic energy of the compressor (12) can be absorbed by the deformation of the bottom plate (23), thereby reducing the impact when the compressor (12) collides with the cylinder (71). Therefore, in the second condition, damage to the cylinder (71) can be suppressed.

[0081] In the first condition where the casing (21) falls to the ground from the machine room (S2) side, the cylinder (71) is located above the compressor (12). This prevents the compressor (12) from colliding with the cylinder (71) when the compressor (12) moves downward due to the impact of the casing (21). This prevents the cylinder (71) from being damaged in the first condition.

[0082] (5-2) The first line (L1) overlaps with the first chamber (S1) in a top view. Therefore, as shown in FIG. 9 , under the second condition, particularly when the casing (21) falls with the first line (L1) aligned with the direction of gravity, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes long. This increases the amount of deformation of the bottom plate (23) when it collides with the ground, thereby reducing the impact when the compressor (12) collides with the cylinder (71). When the first line (L1) aligns with the direction of gravity, the collision load acting from the compressor (12) to the cylinder (71) increases. However, this collision load can be mitigated by the deformation of the bottom plate (23).

[0083] (5-3) The first line (L1) overlaps with the partition member (45) in a top view. Therefore, under the second condition, particularly when the casing (21) falls with the first line (L1) aligned with the direction of gravity, the cylinder (71) collides with the partition member (45). This allows the partition member (45) to absorb the impact of the cylinder (71) colliding with the ground. As a result, damage to the cylinder (71) can be suppressed.

[0084] (5-4) The first line (L1) overlaps with the fan (30) in a top view. Therefore, under the second condition, particularly when the casing (21) falls with the first line (L1) aligned with the direction of gravity, the cylinder (71) collides with the fan (30). This allows the fan (30) to absorb the impact of the cylinder (71) colliding with the ground. As a result, damage to the cylinder (71) can be suppressed.

[0085] (5-5) The first line (L1) overlaps with the left side (23b) in a top view. Therefore, under the second condition, particularly when the casing (21) falls with the first line (L1) aligned with the direction of gravity, the left side (23b), which is farthest from the cylinder (71) among the sides (23a, 23b, 23c, 23d) of the bottom plate (23), collides with the ground (G). This increases the amount of deformation of the bottom plate (23) when it collides with the ground, thereby reducing the impact when the compressor (12) collides with the cylinder (71).

[0086] (5-6) The first position (P1) is defined as the intersection of the first line (L1) and the left side (23b) when viewed from above. The second position (P2) is defined as the midpoint of the left side (23b). The third position (P3) is defined as the position of the first end (E1) of the left side (23b) when viewed from above. The first position (P1) is closer to the third position (P3) than the second position (P2).

[0087] Under the second condition, particularly when the casing (21) falls with the first line (L1) aligned with the direction of gravity, a portion of the third side edge (23b) closer to the first end (E1) hits the ground. This increases the distance of the bottom plate (23) from the ground (G) to the cylinder (71), thereby increasing the amount of deformation of the bottom plate (23) when it hits the ground.

[0088] (5-7) The first length (a) of the bottom plate (23) in the first chamber (S1) in the longitudinal direction is greater than the second length (b) of the bottom plate (23) in the second chamber (S2) in the longitudinal direction. Therefore, under the second condition, when the casing (21) falls, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer. As a result, the amount of deformation of the bottom plate (23) when it hits the ground can be increased.

[0089] (6) Modifications The above embodiment may be modified as follows: The following describes the differences from the above embodiment.

[0090] (6-1) Modification 1 In Modification 1 shown in Fig. 10, similarly to the embodiment, the cylinder (71) is closer to the fan chamber (S1) than the compressor (12). In Modification 1, the compressor (12) is disposed closer to the front than the cylinder (71).

[0091] In the first modification, the first line (L1) overlaps the air heat exchanger (13) in a top view of the bottom plate (23). Specifically, the first line (L1) overlaps a bent portion of the air heat exchanger (13) connecting the first heat exchange section (13a) and the second heat exchange section (13b). This configuration prevents the cylinder (71) from colliding with the air heat exchanger (13) when the casing (21) falls under the second condition, particularly when the first line (L1) is aligned with the direction of gravity. This allows the air heat exchanger (13) to absorb the impact of the cylinder (71) colliding with the ground. As a result, damage to the cylinder (71) can be reduced.

[0092] In the first modification, the first position (P1) is closer to the third position (P3) than to the second position (P2). In other words, the distance between the first position (P1) and the third position (P3) is shorter than the distance between the first position (P1) and the second position (P2). Here, the first position (P1) is the position of the intersection of the first line (L1) and the left side (23b) in a top view. The second position (P2) is the midpoint of the left side (23b). The third position (P3) is the position of the second end (E2) of the left side (23b) in a top view. With this configuration, under the second condition, particularly when the casing (21) falls with the first line (L1) aligned with the direction of gravity, a portion of the third side edge (23b) near the second end (E2) hits the ground. Therefore, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer, and the amount of deformation of the bottom plate (23) when the bottom plate (23) hits the ground can be increased.

[0093] In the first modification, the intersection (first position (P1)) between the first line (L1) and the third side edge (23b) is located on the opposite side of the second center of gravity (C2) of the cylinder (71) across the center line (M) perpendicular to the left side (23b) in top view. In other words, the first position (P1) and the second center of gravity (C2) are located on opposite sides of the center line (M) in the direction of the left side (23b). With this configuration, under the second condition, particularly when the casing (21) falls with the first line (L1) aligned with the direction of gravity, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) is increased. This increases the amount of deformation of the bottom plate (23) when it hits the ground.

[0094] (6-2) Modification 2 As shown in FIG. 11 , the first straight line (L1) in Modification 2 overlaps with the rear side (23d) of the bottom plate (23) instead of the left side (23b) in a top view. In this case, the first straight line (L1) overlaps with the first heat exchange section (13a) of the air heat exchanger (13). Even in this configuration, when the casing (21) falls from the fan chamber (S1), the kinetic energy of the compressor (12) can be absorbed by deformation of the bottom plate (23). In addition, the air heat exchanger (13) functions as a buffer member.

[0095] (6-3) Modification 3 As shown in FIG. 12 , the first straight line (L1) of Modification 3 does not overlap the fan chamber (S1) in a top view of the bottom plate (23). However, the first straight line (L1) overlaps a portion of the air heat exchanger (13) that protrudes toward the machine chamber (S2) in a top view of the bottom plate (23). Even in this configuration, when the casing (21) falls from the fan chamber (S1), the kinetic energy of the compressor (12) can be absorbed by deformation of the bottom plate (23). In addition, the air heat exchanger (13) functions as a buffer member.

[0096] (6-4) Modification 4 As shown in FIG. 13 , in Modification 4, the end of the partition member (45) is curved in a top view of the bottom plate (23). Specifically, the partition member (45) has a curved portion (45a) that curves toward the right as it extends rearward. An expanded portion (95), which is part of the fan chamber (S1), is formed at the rear of the machine chamber (S2). The cylinder (71) is disposed closer to the fan chamber (S1) than to the compressor (12) in a top view of the bottom plate (23). In this configuration, when the casing (21) falls from the expanded portion (95), the bottom plate (23) deforms at a portion corresponding to the expanded portion (95), thereby absorbing the kinetic energy of the compressor (12).

[0097] (7) Other Embodiments The heat source device (1) may constitute a part of a refrigeration cycle device. Specifically, the refrigeration cycle device may be a separate type in which a heat source unit, which is the heat source device (1), and a utilization unit are connected via a connecting pipe. The refrigeration cycle device may be an air conditioner, a transportable refrigeration device, a stationary refrigeration device, or the like.

[0098] The first straight line (L1) may pass through the front edge (23c) of the bottom plate (23) in a top view.

[0099] In this embodiment, a corner is formed at the end of the third side edge (left side edge (23b)). However, the end of the third side edge (23b) may be continuous with an arc portion in a top view. In this case, the end of the third side edge (23b) is defined as the continuous position of the third side edge (23b) and the arc portion.

[0100] The support plate (51) may be configured to support both the compressor (12) and the cylinder (71) from below. In this case, the compressor (12) and the cylinder (71) are not fixed on the bottom plate (23).

[0101] The vibration-damping mechanism (50) may have a lower support plate that supports the elastic support portion (52) of the embodiment from below, and a lower elastic support portion that is fixed on the bottom plate (23) and supports the lower support plate from below.

[0102] The sound-insulating member (60) may cover only the compressor (12). In other words, the cylinder (71) may be disposed outside the sound-insulating member (60). In this case, the sound-insulating member (60) serves as a buffer member between the compressor (12) and the cylinder (71).

[0103] A sound-absorbing material may be provided inside the sound-insulating member (60). The sound-absorbing material is a resin material having open cells, such as urethane. The use of the sound-absorbing material improves the noise reduction effect. When the casing (21) falls, the sound-absorbing material absorbs the impact when the cylinder (71) hits the ground (G). The sound-absorbing material (90) may be provided on the outside of the sound-insulating member (60) instead of the inside, or may be provided on both the inside and the outside of the sound-insulating member (60).

[0104] A buffer member may be provided between the compressor (12) and the cylinder (71). The buffer member is preferably a component part of the refrigerant circuit (11), such as the water heat exchanger (15) or the refrigerant piping.

[0105] Although the embodiments and modifications have been described above, it will be understood that various modifications in form and detail are possible without departing from the spirit and scope of the claims. Furthermore, elements of the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate. Furthermore, the terms "first," "second," "third," etc. in the specification and claims are used to distinguish between terms to which these terms are attached, and do not limit the number or order of those terms.

[0106] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for heat source devices.

[0107] 1 heat source device 11 refrigerant circuit 12 compressor 13 air heat exchanger 21 casing 23 bottom plate 23b left side (third side) 23c front side (first side) 23d rear side (second side) 30 fan 45 partition member 71 cylinder 71a outlet E1 first end E2 second end L1 first straight line M center line P1 first position P2 second position P3 third position S1 fan chamber (first chamber) S2 machine chamber (second chamber)

Claims

1. A heat source device comprising: a compressor (12) and an air heat exchanger (13) included in a refrigerant circuit (11) that performs a refrigeration cycle; a cylinder (71) that stores a flammable refrigerant to be filled into the refrigerant circuit (11); a fan (30) that transports air that exchanges heat with the air heat exchanger (13); a casing (21) having a bottom plate (23) on which the compressor (12), the air heat exchanger (13), and the cylinder (71) are placed; and a partition member (45) that divides the interior 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), wherein the cylinder (71) is located closer to the first chamber (S1) than the compressor (12).

2. A heat source device as described in claim 1, wherein, when viewed from above on the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the first chamber (S1).

3. A heat source device as described in claim 1 or 2, wherein, when viewed from above on the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the air heat exchanger (13).

4. A heat source device as described in any one of claims 1 to 3, wherein, when viewed from above the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the partition member (45).

5. A heat source device according to any one of claims 1 to 4, wherein, in a top view of the bottom plate (23), a line passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the fan (30).

6. The heat source device according to any one of claims 1 to 5, wherein the bottom plate (23) has a first side edge (23c) and a second side edge (23d) extending along the first chamber (S1) and the second chamber (S2), and a third side edge (23b) located on the first chamber (S1) side and continuing with the first side edge (23c) and the second side edge (23d), and wherein, in a top view of the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) overlaps with the third side edge (23b).

7. A heat source device as described in claim 6, wherein the intersection of the first straight line (L1) and the third side edge (23b) is located on the opposite side of the center of gravity of the cylinder (71) across a center line (M) perpendicular to the third side edge (23b) when viewed from the top.

8. A heat source device as described in claim 6 or 7, wherein a first position (P1) is defined as the position of the intersection of the first straight line (L1) and the third side edge (23b) when viewed from above the bottom plate (23), a second position (P2) is defined as the midpoint of the third side edge (23b), and a third position (P3) is defined as the position of the end (E1, E2) of the third side edge (23b) when viewed from above the bottom plate (23), and the distance between the first position (P1) and the third position (P3) is shorter than the distance between the first position (P1) and the second position (P2).

9. A heat source device according to any one of claims 6 to 8, wherein the longitudinal length of the bottom plate (23) in the first chamber (S1) is greater than the longitudinal length of the bottom plate (23) in the second chamber (S2).

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