Heat source device

Abstract

A heat source device (1) includes: a cylinder (71) which stores a flammable refrigerant and has, in a lower portion thereof, a discharge port (71a) for discharging the flammable refrigerant; a casing (21) having a bottom plate (23) on which a compressor (12) and the cylinder are set; and a restriction part (80) for restricting a direction in which the compressor is displaced when the heat source device falls. A first straight line (L1) is defined, in a top view of the heat source device in an installed state, as a straight line passing through the center of gravity (C1) of the compressor and the center of gravity (C2) of the cylinder. The restriction part, under conditions in which the first straight line coincides with the gravitational direction, restricts the displacement of the compressor toward the cylinder so that the displacement occurs in a direction away from the first straight line.

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 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, a configuration in which a flammable refrigerant is used and a cylinder is provided within the casing presents the following unique problems.

[0005] During transportation of the heat source device until installation at the site, there is a risk that the heat source device may fall. Here, a compressor and a gas cylinder are installed inside the casing. When the heat source device falls to the ground, the compressor and the gas cylinder may come into contact with the ground while aligned in a straight line in the direction of gravity. In this case, if the compressor collides with the gas cylinder due to the impact of the fall, the gas cylinder may be damaged, and the refrigerant may leak into the air.

[0006] An object of the present disclosure is to reduce the impact when the compressor collides with the cylinder when the heat source device is dropped.

[0007] A first aspect of the present disclosure relates to a heat source device (1). The heat source device (1) includes a compressor (12) included in a refrigerant circuit (11) that performs a refrigeration cycle, a cylinder (71) that stores a flammable refrigerant to be charged into the refrigerant circuit (11) and has a discharge port (71a) at its bottom for discharging the flammable refrigerant, a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are placed, and a restricting portion (80) that restricts the direction of displacement of the compressor (12) when the heat source device (1) is dropped. A first line (L1) is defined as a line passing through a center of gravity (C1) of the compressor (23) and a center of gravity (C2) of the cylinder (71) in a top view in which the bottom plate (23) is viewed from above with the heat source device (1) installed. The restricting portion (80) restricts displacement of the compressor (23) toward the cylinder (71) in a direction away from the first straight line (L1) under the condition that the first straight line (L1) coincides with the direction of gravity.

[0008] In the first aspect, when the heat source device (1) is dropped under the condition that the first line (L1) coincides with the direction of gravity, the restricting portion (80) restricts the displacement of the compressor (12) toward the cylinder (71) in a direction away from the first line (L1). The first line (L1) is a line passing through the center of gravity (C1) of the compressor (12) and the center of gravity (C2) of the cylinder (71) in a top view of the bottom plate (23) when the heat source device (1) is installed. Therefore, when the heat source device (1) is dropped under the condition that the first line (L1) coincides with the direction of gravity, the displacement direction of the compressor (12) due to the impact of the drop deviates from the direction toward the cylinder (71) along the first line (L1). This reduces the impact acting on the cylinder (71) from the compressor (12).

[0009] A second aspect of the present disclosure is the heat source device (1) of the first aspect, wherein the restricting portion (80) includes a plate member (81) made of the bottom plate (23) or an intermediate plate (53) placed on the bottom plate (23), and a plurality of legs (12b) fixed to the plate member (81) and supporting the compressor (12) from below. In the top view, the plurality of legs (12b) are arranged asymmetrically with respect to the first straight line (L1).

[0010] In the second aspect, the legs (12b) supporting the compressor (12) are arranged asymmetrically with respect to the first straight line (L1). As a result, when the heat source device (1) is dropped and the first straight line (L1) coincides with the direction of gravity, the load applied from the legs (12b) of the compressor (12) to the plate member (81) due to the impact of the drop becomes unbalanced between the regions on both sides of the first straight line (L1), and the degree of deformation of the plate member (81) can be made different between the regions on both sides of the first straight line (L1). This allows the direction of displacement of the compressor (12) due to the impact of the drop to be shifted from the direction along the first straight line (L1) toward the cylinder (71).

[0011] A third aspect of the present disclosure is the heat source device (1) of the second aspect, wherein, when viewed from the top, the number of the legs (12b) is different between the region on one side of the plate member (81) and the region on the other side of the plate member (81) separated by the first straight line (L1).

[0012] In the third aspect, the plurality of legs (12b) supporting the compressor (12) are different between regions on one side and the other side of the plate member (81) with respect to the first straight line (L1). When the heat source device (1) is dropped with the first straight line (L1) aligned with the direction of gravity, the load acting on the plate member (81) from the compressor (12) through the legs (12b) is greater in the region on the other side of the first straight line (L1) where the number of legs (12b) is greater. This advantageously differs the degree of deformation of the plate member (81) between the regions on both sides of the first straight line (L1) and shifts the direction of displacement of the compressor (12) due to the impact of the drop from the direction along the first straight line (L1) toward the cylinder (71).

[0013] A fourth aspect of the present disclosure is the heat source device (1) of any one of the first to third aspects, wherein the restricting portion (80) includes a plate member (81) that supports the compressor (12) from below. A second line (L2) is defined as a line that is perpendicular to the first line (L1) and passes through the center of gravity (C1) of the compressor (12). The plate member (81) is an intermediate plate (53) installed on the bottom plate (23) or the bottom plate (23), and has a first region (A1) and a second region (A2) defined by the first line (L1) on the side closer to the cylinder (71) than the second line (L2) in the top view. The first region (A1) is provided with a rib (53a) that extends in a direction intersecting the second line (L2).

[0014] In the fourth aspect, a rib (81a) is provided in the first region (A1) of the plate member (81). The rib (81a) extends in a direction intersecting the second straight line (L2). The rib (81a) increases the buckling strength of the plate member (81) in the direction along the first straight line (L1) in the first region (A1) compared to the second region (A2). As a result, when the heat source device (1) is dropped and the first straight line (L1) coincides with the direction of gravity, the second region (A2) of the plate member (81) buckles before the first region (A1) when a load from the compressor (12) is applied to the plate member (81). This allows the direction of displacement of the compressor (12) due to the impact of the drop to be shifted from the direction along the first straight line (L1) toward the cylinder (71).

[0015] A fifth aspect of the present disclosure is the heat source device (1) of any one of the first to fourth aspects, wherein the restricting portion (80) includes a plate member (81) that supports the compressor (12) from below. A second line (L2) is defined as a line that is perpendicular to the first line (L1) and passes through the center of gravity (C1) of the compressor (12). The plate member (81) is an intermediate plate (53) or the bottom plate (23) installed on the bottom plate (23), and has a first region (A1) and a second region (A2) defined by the first line (L1) on the side of the cylinder (71) relative to the second line (L2) in the top view. The thickness of the plate member (81) is greater in the first region (A1) than in the second region (A2).

[0016] In the fifth aspect, the thickness of the plate member (81) is greater in the first region (A1) than in the second region (A2). The buckling strength of the plate member (81) increases as the thickness of the plate member (81) increases. Therefore, the buckling strength of the plate member (81) in the direction along the first straight line (L1) is greater in the first region (A1) than in the second region (A2). As a result, when the heat source device (1) is dropped and the first straight line (L1) coincides with the direction of gravity, the second region (A2) of the plate member (81) buckles before the first region (A1) when a load from the compressor (12) is applied to the plate member (81). This allows the direction of displacement of the compressor (12) due to the impact of the drop to be shifted from the direction along the first straight line (L1) toward the cylinder (71).

[0017] A sixth aspect of the present disclosure is the heat source device (1) of any one of the first to fifth aspects, wherein the restricting portion (80) includes a plate member (81) that supports the compressor (12) from below. A second line (L2) is defined as a line that is perpendicular to the first line (L1) and passes through the center of gravity (C1) of the compressor (12). The plate member (81) is an intermediate plate (53) or the bottom plate (23) installed on the bottom plate (23), and has a first region (A1) and a second region (A2) defined by the first line (L1) on the side of the cylinder (71) relative to the second line (L2) in the top view. The Young's modulus of the material of the plate member (81) is greater in the first region (A1) than in the second region (A2).

[0018] In the sixth aspect, the Young's modulus of the material of the plate member (81) is greater in the first region (A1) than in the second region (A2). The buckling strength of the plate member (81) increases in the portion of the plate member (81) where the Young's modulus of the material is greater. Therefore, the buckling strength of the plate member (81) in the direction along the first straight line (L1) is greater in the first region (A1) than in the second region (A2). As a result, when the heat source device (1) is dropped and the first straight line (L1) coincides with the direction of gravity, the second region (A2) of the plate member (81) buckles before the first region (A1) when a load from the compressor (12) is applied to the plate member (81). This allows the direction of displacement of the compressor (12) due to the impact of the drop to be shifted from the direction along the first straight line (L1) toward the cylinder (71).

[0019] A seventh aspect of the present disclosure is the heat source device (1) of any one of the first to sixth aspects, wherein the restricting portion (80) includes a plate member (81) that supports the compressor (12) from below. A second line (L2) is defined as a line that is perpendicular to the first line (L1) and passes through the center of gravity (C1) of the compressor (12). The plate member (81) is an intermediate plate (53) or the bottom plate (23) installed on the bottom plate (23), and has a first region (A1) and a second region (A2) defined by the first line (L1) on the side of the cylinder (71) relative to the second line (L2) in the top view. An opening (81d) penetrating the plate member (81) is formed in the second region (A2).

[0020] In the seventh aspect, an opening (81d) is formed in the second region (A2) of the plate member (81). The opening (81d) penetrates the plate member (81). The buckling strength of the plate member (81) is reduced in the region where the opening (81d) is located. Therefore, the buckling strength of the plate member (81) in the direction along the first straight line (L1) is lower in the second region (A2) than in the first region (A1). As a result, when the heat source device (1) is dropped and the first straight line (L1) coincides with the direction of gravity, the second region (A2) of the plate member (81) buckles before the first region (A1) when a load from the compressor (12) is applied to the plate member (81). This allows the direction of displacement of the compressor (12) due to the impact of the drop to be shifted from the direction along the first straight line (L1) toward the cylinder (71).

[0021] An eighth aspect of the present disclosure is the heat source device (1) of any one of the first to seventh aspects, wherein the restricting portion (80) includes a support member (82) that supports the compressor (12) with respect to an intermediate plate (53) installed on the bottom plate (23), the bottom plate (23), or a peripheral wall (21 a) of the casing (21). The support member (82) is located on the cylinder (71) side of the compressor (12) and extends in a direction intersecting the first straight line (L1) in the top view.

[0022] In the eighth aspect, a support member (82) is provided on the cylinder (71) side of the compressor (12). The support member (82) extends in a direction intersecting the first line (L1) in a top view and supports the compressor (12) on an intermediate plate (53) installed on the bottom plate (23), the bottom plate (23), or the peripheral wall (21a) of the casing (21). When the heat source device (1) falls under a condition in which the first line (L1) coincides with the direction of gravity, the support member (82) is interposed between the intermediate plate (53), the bottom plate (23), or the peripheral wall (21a) of the casing (21) and the compressor (12). This allows the support member (82) to apply a force to the compressor (12) in a direction different from the direction toward the cylinder (71). This allows the direction of displacement of the compressor (12) due to the impact of the fall to be shifted from the direction toward the cylinder (71) along the first line (L1).

[0023] A ninth aspect of the present disclosure is a heat source device (1) according to any one of the first to eighth aspects, further comprising an intermediate plate (53) that supports the compressor (12) and the cylinder (71) from below, and an elastic support part (54) that is fixed onto the bottom plate (23) and supports the intermediate plate (53) from below.

[0024] In the ninth aspect, the intermediate plate (53) supporting the compressor (12) and the cylinder (71) from below is installed on the bottom plate (23) via the elastic support portion (54). This allows the elastic support portion (54) to suppress vibrations of the compressor (12) during operation. Furthermore, when the heat source device (1) is dropped, the portion of the intermediate plate (53) between the compressor (12) and the cylinder (71) is deformed by the impact of the drop. Therefore, the kinetic energy of the compressor (12) can be absorbed by the deformation of the intermediate plate (53). Therefore, even if the compressor (12) hits the cylinder (71), the impact acting from the compressor (12) on the cylinder (71) can be reduced.

[0025] A tenth aspect of the present disclosure is the heat source device (1) of any one of the first to ninth aspects, further comprising a sound insulating member (60) surrounding the compressor (12).

[0026] In the tenth aspect, the compressor (12) is surrounded by a sound insulating member (60). When the heat source device (1) falls, the sound insulating member (60) absorbs the impact acting on the cylinder (71).

[0027] An eleventh aspect of the present disclosure is the heat source device (1) of any one of the first to tenth aspects, further comprising a sound absorbing material (90) arranged so as to overlap an outer surface or an inner surface of the casing (21).

[0028] In the eleventh aspect, the sound absorbing material (90) is arranged so as to overlap the outer surface or the inner surface of the casing (21). When the heat source device (1) is dropped, the sound absorbing material (90) absorbs the impact acting on the cylinder (71).

[0029] A twelfth aspect of the present disclosure is a heat source device (1) according to any one of the first to eleventh aspects, wherein the casing (21) accommodates the entire refrigerant circuit (11).

[0030] In the twelfth aspect, the entire refrigerant circuit (11) that forms a closed circuit is provided within the casing (21). Therefore, compared to, for example, a separate-type refrigeration cycle device, the amount of refrigerant required to be charged in the refrigerant circuit (11) is reduced, and the size of the cylinder (71) can be reduced. As a result, the rigidity of the cylinder (71) can be increased, and damage to the cylinder (71) can be suppressed.

[0031] 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 with the front access opening of the machine chamber 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 schematic diagram of the interior of the outdoor unit, viewed from above, showing the positional relationship between the compressor and the cylinder and the regulating unit. FIG. 7 is a schematic diagram illustrating the positional relationship between the compressor and the cylinder and the displacement direction of the compressor when a heat source device according to a comparative example is dropped under the condition that the first straight line aligns with the direction of gravity. FIG. 8 is a schematic diagram illustrating the positional relationship between the compressor and the cylinder and the displacement direction of the compressor when a heat source device according to an embodiment is dropped under the condition that the first straight line aligns with the direction of gravity. FIG. 9 is a diagram corresponding to FIG. 6 of the outdoor unit according to Modification 1. FIG. 10 is a diagram corresponding to FIG. 8 of the heat source device according to Modification 1. FIG. 11 is a diagram corresponding to FIG. 6 of the heat source device according to Modification 2. FIG. 12 is a view corresponding to FIG. 8 of the heat source device of Modification 2. FIG. 13 is a view corresponding to FIG. 6 of the heat source device of Modification 3. FIG. 14 is a view corresponding to FIG. 8 of the heat source device of Modification 3. FIG. 15 is a view corresponding to FIG. 6 of the heat source device of Modification 4. FIG. 16 is a view corresponding to FIG. 8 of the heat source device of Modification 4. FIG. 17 is a view corresponding to FIG. 6 of the heat source device of Modification 5. FIG. 18 is a view corresponding to FIG. 8 of the heat source device of Modification 5. FIG. 19 is a view corresponding to FIG. 6 of the heat source device of Modification 6. FIG. 20 is a view corresponding to FIG. 8 of the heat source device of Modification 6. FIG. 21 is a view corresponding to FIG. 6 of the heat source device of Modification 7. FIG. 22 is a view corresponding to FIG. 8 of the heat source device of Modification 7. FIG. 23 is a view corresponding to FIG. 6 of the heat source device of Modification 8. FIG. 24 is a view corresponding to FIG. 8 of the heat source device of Modification 8. FIG. 25 is a view corresponding to FIG. 6 of the heat source device of Modification 9. FIG. 26 is a view corresponding to FIG. 8 of the heat source device of Modification 9. Fig. 27 is a diagram corresponding to Fig. 6 of a heat source device of modified example 10. Fig. 28 is a diagram corresponding to Fig. 8 of a heat source device of modified example 10. Fig. 29 is a diagram corresponding to Fig. 6 of a heat source device of modified example 11. Fig. 30 is a diagram corresponding to Fig. 8 of a heat source device of modified example 11. Fig. 31 is a diagram corresponding to Fig. 6 of a heat source device of modified example 12. Fig. 32 is a diagram corresponding to Fig. 8 of a heat source device of modified example 12.Fig. 33 is a view of a heat source device of another embodiment, corresponding to Fig. 4. Fig. 34 is a view of a heat source device of another embodiment, corresponding to Fig. 6.

[0032] Hereinafter, exemplary embodiments will be described in detail with reference to the drawings. Note that the drawings are intended to conceptually explain the technology of the present disclosure. Therefore, in the drawings, dimensions, ratios, or numbers may be exaggerated or simplified to facilitate understanding of the technology of the present disclosure.

[0033] (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).

[0034] The casing (21) accommodates the entire refrigerant circuit (11), which is a closed circuit. That is, the casing (21) accommodates components of the refrigerant circuit (11), such as the compressor (12), the water heat exchanger (15), and the cylinder (71). The refrigerant circuit (11) performs a refrigeration cycle. The refrigerant circuit (11) is filled with a refrigerant. The refrigerant in the refrigerant circuit (11) is a flammable refrigerant.

[0035] Specifically, the refrigerant in this embodiment is propane (R290). Propane is 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 below 500°C. Flammable refrigerants may include methane (R50), ethane (R170), butane (R600), and isobutane (R600a). Natural refrigerants may also include corrosive refrigerants such as ammonia (R717).

[0036] (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).

[0037] The compressor (12) compresses the refrigerant. A discharge pipe (18) is connected to the discharge side of the compressor (12). A suction pipe (19) is connected to the suction side of the compressor (12). The accumulator (17) accumulates liquid refrigerant sucked into 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).

[0038] The four-way selector valve (16) switches the refrigerant circulation direction. The four-way selector valve (16) switches between a first state (shown by a solid line in FIG. 1 ) and a second state (shown by a dashed line in FIG. 1 ). In the first state, the four-way selector valve (16) connects the first port (16a) to the third port (16c) and connects the second port (16b) to the fourth port (16d). In the second state, the four-way selector valve (16) connects the first port (16a) to the second port (16b) and connects the third port (16c) to the fourth port (16d).

[0039] 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).

[0040] 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, the water heat exchanger (15) functions as a radiator (condenser), and 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, the air heat exchanger (13) functions as a radiator (condenser), and the water heat exchanger (15) functions as an evaporator.

[0041] (1-2) Water Circuit The water circuit (40) is connected to the water heat exchanger (15). It includes a first water pipe (41) and a second water pipe (42). Water flows through each of the first water pipe (41) and the second water pipe (42). The first water pipe (41) is connected to the upstream side of the water heat exchanger (15) and serves as a water supply pipe for supplying water to the water heat exchanger (15). The second water pipe (42) is connected to the downstream side of the water heat exchanger (15) and serves as a hot water outlet pipe for discharging hot water from the water heat exchanger (15).

[0042] 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, and other devices. A gas-liquid separator (44) is connected to the water circuit (40). The gas-liquid separator (44) releases refrigerant that has leaked from the refrigerant circuit (11) into the water circuit (40) via the water heat exchanger (15) into the atmosphere.

[0043] (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 left-right direction corresponds to the first direction. The front-rear direction corresponds to the second direction. The up-down direction corresponds to the third direction. The outdoor unit (20) has a casing (21), components of a refrigerant circuit (11), and components of a water circuit (40).

[0044] The equipment of the refrigerant circuit (11) includes, in addition to the above-mentioned elements, a refrigerant pipe, a solenoid valve, an internal heat exchanger, a filter, a pipe insulation material, etc. The equipment of the water circuit (11) includes the above-mentioned water heat exchanger (15), a part of each of the first water pipe (41) and the second water pipe (42), etc. The outdoor unit (20) further includes a partition member (45) that partitions the inside of the casing (21) and a fan (30) that transports outdoor air.

[0045] (2-1) Casing and Partition Member The casing (21) is installed outdoors. The casing (21) is formed in the shape of a hollow box. Strictly speaking, the casing (21) is formed in the shape of a box with a left face and a part of the rear face being open. The casing (21) is formed in the shape of a rectangular parallelepiped with the longitudinal direction being the left-right direction and the lateral direction being the short side. The casing (21) is made of a metal plate material.

[0046] 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 right plate (24), the left plate (25), the front plate (26), and the rear plate (27) form a peripheral wall (21a) of the casing (21). The top plate (22) and the bottom plate (23) face each other. The right plate (24) and the left plate (25) face each other. The front plate (26) and the rear plate (27) face each other.

[0047] 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 left plate (25) is located toward the front of the casing (21) and is continuous with the front plate (26). The front plate (26) forms the front surface of the casing (21). The rear plate (27) forms the rear surface of the casing (21). The rear plate (27) is located toward the right of the casing (21) and is continuous with the right plate (24).

[0048] 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-rear direction in a top view. The partition member (45) may have a curved or bent shape in a top view, or may be formed into a curved shape. The partition member (45) divides the interior of the casing (21) into a fan chamber (S1) and a machine chamber (S2). The fan chamber (S1) is formed on the left side of the casing (21). The machine chamber (S2) is formed on the right side of the casing (21).

[0049] 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 a portion of the front plate (26) of the casing (21) in front of the fan chamber (S1). A flow path through which outdoor air flows is formed in the fan chamber (S1) from the inlet (28) to the outlet (29).

[0050] (2-2) Configuration of the Fan Chamber The fan chamber (S1) is configured as a substantially rectangular parallelepiped space. The length of the fan chamber (S1) in the left-right direction is longer than the length of the fan chamber (S1) in the front-rear direction. The fan chamber (S1) is provided with an air heat exchanger (13), a fan (30), and a bell mouth (31).

[0051] 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.

[0052] 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 in the left-right direction so as to pass through the 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).

[0053] The fan (30) is a propeller fan and includes 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) that is attached to the bottom plate (23). The motor (30a) rotates the impeller (30b). The bell mouth (31) is cylindrical and is located around the impeller (30b). The bell mouth (31) is continuous with the air outlet (29).

[0054] (3) Configuration of the Machine Room The machine room (S2) is configured as a substantially rectangular parallelepiped space. The length of the machine room (S2) in the left-right direction is approximately equal to the length of the machine room (S2) in the front-to-rear direction. The length of the machine room (S2) in the up-to-down direction is longer than the length of the machine room (S2) in the left-to-right direction and the length of the machine room (S2) in the front-to-rear direction. The length of the machine room (S2) in the left-to-right direction is shorter than the length of the fan room (S1) in the left-to-right direction.

[0055] The machine room (S2) accommodates a compressor (12), a water heat exchanger (15), a gas-liquid separator (44), and an accumulator (17). The compressor (12), the water heat exchanger (15), the gas-liquid separator (44), and the accumulator (17) are included in the refrigerant circuit (11). The outdoor unit (20) further includes a vibration isolation mechanism (50), a sound insulation member (60), and a filling unit (70).

[0056] (3-1) Compressor The compressor (12) is disposed near the front and left side of the machine room (S2). The compressor (12) has a compressor casing (12a). The compressor casing (12a) is formed in a vertically elongated hollow cylindrical shape. The height of the compressor casing (12a) is greater than the outer diameter of the compressor casing (12a). 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.

[0057] (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).

[0058] (3-3) Gas-Liquid Separator The water heat exchanger (15) 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).

[0059] (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 closer to the rear plate (27) than the compressor (12) and the water heat exchanger (15). The accumulator (17) is formed in the shape of a vertically long hollow cylinder. The height of the accumulator (17) is greater than the outer diameter of the accumulator (17).

[0060] (3-5) Vibration Isolation Mechanism The vibration isolation mechanism (50) suppresses vibrations of the compressor (12) and the accumulator (17). The vibration isolation mechanism (50) of this embodiment has a double vibration isolation structure. Specifically, the vibration isolation mechanism (50) includes a support plate (51), a first elastic support member (52), an intermediate plate (53), and a second elastic support member (54). The second elastic support member (54), the intermediate plate (53), the first elastic support member (52), and the support plate (51) are installed in this order on the bottom plate (23).

[0061] The intermediate plate (53) is placed on the bottom plate (23) via the second elastic support portion (54). The intermediate plate (53) of this embodiment supports the compressor (12), the water heat exchanger (15), the accumulator (17), and the filling unit (70) from below. The second elastic support portion (54) is fixed to the top of the bottom plate (23) and supports the intermediate plate (53) from below. The intermediate plate (53) is a plate member that is substantially rectangular in top view.

[0062] The vibration-proof mechanism (50) of this embodiment has four second elastic support members (54). The second elastic support members (54) are respectively disposed near the four tops of the intermediate plate (53). Each second elastic support member (54) is interposed between the bottom plate (23) and the intermediate plate (53). The second elastic support members (54) are made of an elastic material such as rubber or urethane. Vibrations of the compressor (12) are attenuated by the second elastic support members (54) before being transmitted to the bottom plate (23).

[0063] The support plate (51) is placed on the intermediate plate (53) via the first elastic support portion (52). The support plate (51) supports the compressor (12) from below. The first elastic support portion (52) is fixed on the intermediate plate (53) and supports the support plate (51) from below. The compressor (12) is fixed on the support plate (51). The support plate (51) is a plate member that is approximately triangular in shape when viewed from above, and is placed such that one apex faces the front and the side portion opposite the apex faces the rear. A circular hole is formed in the center of the support plate (51) into which the bottom of the compressor (12) fits.

[0064] The vibration-proof mechanism (50) of this embodiment has three first elastic support members (52). The first elastic support members (52) are respectively arranged near the three tops of the support plate (51). The three first elastic support members (52) constitute the legs (12b) of the compressor (12). Each first elastic support member (52) is interposed between the support plate (51) and the intermediate plate (53). The first elastic support members (52) are made of an elastic material such as rubber or urethane. Vibrations of the compressor (12) are attenuated by the first elastic support members (52) before being transmitted to the intermediate plate (53).

[0065] (3-6) Sound Insulating Member The sound insulating member (60) prevents noise generated during operation of the compressor (12) from propagating to the outside of the casing (21). The sound insulating member (60) is formed in the shape of a hollow box that is open at the bottom. The sound insulating member (60) has an upper wall (61), a right wall (62), a left wall (63), a front wall (64), and a rear wall (65).

[0066] 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 partition 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 configured to be detachable from the main body of the sound insulation member (60).

[0067] 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. The sound-insulating member (60) is made of, for example, a metal member or a rubber sheet. The sound-insulating member (60) forms an internal space (66) surrounding the compressor (12). In this embodiment, the internal space (66) accommodates devices such as the compressor (12), the accumulator (17), the water heat exchanger (15), and the charging unit (70).

[0068] The sound insulating member (60) and the casing (21) are arranged 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).

[0069] (3-7) Charging Unit The charging unit (70) is disposed to the right of the machine room (S2) and toward the front of the machine room (S2). As shown in Figure 6, the charging unit (70) includes a cylinder (71), a connecting pipe (72), a control valve (73), and a protective member (74).

[0070] 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.

[0071] The cylinder (71) is formed in the shape of a vertically long hollow cylinder. The height of the cylinder (71) is greater than the outer diameter of the cylinder (71). The cylinder (71) constitutes a sealed pressure-resistant container. The rigidity of the cylinder (71) is lower than the rigidity of the compressor casing (12a).

[0072] As shown in FIGS. 1 and 3 , the cylinder (71) has a discharge port (71a) at its lower part. Strictly speaking, the discharge port (71a) is formed at the bottom of the cylinder (71). The discharge port (71a) discharges flammable refrigerant from the cylinder (71). The density of flammable refrigerant is relatively high. Therefore, providing the discharge port (71a) at the lower part of the cylinder (71) can promote the discharge of refrigerant. In addition, when the refrigerant circuit (11) is filled with refrigerant, the refrigerant can be prevented from remaining in the cylinder (71).

[0073] The connecting pipe (72) is a pipe for injecting the refrigerant from the cylinder (71) into the refrigerant circuit (11). The connecting pipe (72) connects the cylinder (71) to 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).

[0074] The control valve (73) is provided in 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 a manual valve that is manually opened and closed. The control valve (73) is located below the cylinder (71).

[0075] The protective member (74) is provided below the cylinder (71). The protective member (74) has a function of protecting a part of the connecting pipe (72) and the regulating valve (73). The protective member (74) supports the cylinder (71) from below. The protective member (74) has a partition wall (74a). The partition wall (74a) surrounds a part of 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).

[0076] (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 of the front plate (26). By removing the front panel (26a), the access port (A) is exposed to the outside of the casing (21). Then, by removing the front wall (64) from the sound-proofing member (60), the devices inside the casing (21) are exposed to the outside of the casing (21).

[0077] The compressor (12) and the cylinder (71) correspond to the access opening (A) in the front-rear direction. A worker at the front of the casing (21) can access the compressor (12) and the cylinder (71) through the access opening (A). This allows the worker to perform maintenance on the compressor (12). The worker can also operate the control valve (73) through the opening (74b) of the protective member (74).

[0078] (4) Features of the Arrangement of the Compressor and the Cylinder The compressor (12) and the cylinder (71) are indirectly installed on the bottom plate (23) via an intermediate plate (53). The relative arrangement of the compressor (12) and the cylinder (71) will be described in detail with reference to FIG. 6.

[0079] (4-1) Arrangement Relationship of Compressor and Cylinder As shown in Figure 6, the compressor (12) and the cylinder (71) are arranged so as to be offset from each other in the horizontal direction when viewed from the front of the access opening (A). The compressor (12) is provided at a position farther from the front plate (26) than the cylinder (71). The distance between the compressor (12) and the front plate (26) is longer than the distance between the cylinder (71) and the front plate (26). In this way, the compressor (12) and the cylinder (71) are arranged adjacent to each other in the depth direction of the casing (21), i.e., in a direction diagonal to the front-to-rear direction, when viewed from the front of the access opening (A).

[0080] In Figure 6, the first center of gravity (C1) is the center of gravity of the compressor (12) when viewed from above. The second center of gravity (C2) is the center of gravity of the cylinder (71) when viewed from above. In this specification, "top view" means the case where the bottom plate (23) is viewed from above when the heat source device (1) is installed. Furthermore, the "center of gravity" is the center of mass when viewed from above or the center of mass in the horizontal direction. The "center of gravity" is not the center of mass in the vertical direction.

[0081] The first straight line (L1) is defined as a line passing through 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. The first straight line (L1) intersects both the front-rear direction and the left-right direction and extends forward from the first center of gravity (C1) toward the second center of gravity (C2). The first straight line (L1) overlaps the front side of the intermediate plate (53) and divides the intermediate plate (53) into two regions.

[0082] (4-2) Issues when the heat source device falls The heat source device (1) houses a cylinder (71) inside a casing (21). The cylinder (71) stores propane, which is a flammable natural refrigerant. There is a possibility that the heat source device (1) may fall during transportation until installation on site.

[0083] FIG. 7A shows a comparative example of a heat source device. The comparative example of the heat source device does not include a restricting portion (80) that restricts the direction of displacement of the compressor (12) when the heat source device is dropped. Specifically, in a top view of the comparative example of the heat source device, the three legs (12b) of the compressor (12) are arranged symmetrically with respect to the first line (L1). In the comparative example, as shown in FIGS. 7A and 7B, if the heat source device is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) collides with the ground (G) in this state, the compressor (12) moves in the direction of gravity toward the ground (G). As a result, the compressor (12) collides with the cylinder (71) so that they overlap vertically.

[0084] When the first line (L1) is aligned with the direction of gravity, the load acting on the cylinder (71) (strictly speaking, the impact load) increases. This is because the vector of the impact load (shown by the white arrow in FIG. 7B ) acting on the cylinder (71) by the compressor (12) is aligned with the direction of gravity. Here, the impact load is a force directed from the first center of gravity (C1) of the compressor (12) to the second center of gravity (C2) of the cylinder (71). Thus, if the heat source device falls under the condition that the first line (L1) is aligned with the direction of gravity, the cylinder (71) is likely to be damaged by the impact of the compressor (12). If the cylinder (71) is damaged, flammable refrigerant will leak.

[0085] (4-3) Restriction Section As shown in Fig. 6, the heat source device (1) includes a restriction section (80) for reducing the impact of the compressor (12) colliding with the cylinder (71) when the heat source device (1) is dropped under the condition that the first line (L1) coincides with the direction of gravity. The restriction section (80) has a function of restricting the direction of displacement of the compressor (12) when the heat source device (1) is dropped. Under the condition that the first line (L1) coincides with the direction of gravity, the restriction section (80) restricts the displacement of the compressor (12) toward the cylinder (71) in a direction away from the first line (L1).

[0086] The restricting portion (80) of this embodiment is configured to guide the displacement of the compressor (12) toward the rear plate (27). The restricting portion (80) is realized by specially arranging the three legs (12b) of the compressor (12). Specifically, the restricting portion (80) includes a plate member (81) and the three legs (12b) of the compressor (12). The plate member (81) is an intermediate plate (53) installed on the bottom plate (23). In a top view, the three legs (12b) are arranged asymmetrically with respect to a first straight line (L1). The centers of none of the legs (12b) overlap the first straight line (L1).

[0087] In a top view, the number of legs (12b) differs between regions on one side of the intermediate plate (53) and regions on the other side of the first straight line (L1). One leg (12b) is arranged in a region (Af) in front of the first straight line (L1), and two legs (12b) are arranged in a region (Ar) behind the first straight line (L1). The one leg (12b) arranged in the region (Ar) behind the first straight line (L1) is located closest to the second center of gravity (C2) of the cylinder (71) of the three legs (12b) in the direction along the first straight line (L1).

[0088] (4-4) Actions when the Heat Source Device is Dropped In this embodiment, an action when the heat source device (1) is dropped under the condition that the first straight line (L1) coincides with the direction of gravity will be described.

[0089] When the heat source device (1) is dropped, the impact of the compressor (12) colliding with the cylinder (71) becomes large when the casing (21) contacts the ground (G) with the first line (L1) aligned with the direction of gravity, as shown in FIGS. 8A and 8B . When the heat source device (1) is dropped under these conditions, the side edge (right edge) of the bottom plate (23) becomes inclined with respect to the ground (G). This can promote deformation of the bottom plate (23) and the right plate (24) before the cylinder (71) hits the ground (G). This allows the kinetic energy of the compressor (12) to be absorbed by the deformation of the casing (21). This reduces the impact acting from the compressor (12) on the cylinder (71).

[0090] Furthermore, in this embodiment, the legs (12b) supporting the compressor (12) are arranged asymmetrically with respect to the first straight line (L1). This reduces the impact acting from the compressor (12) on the gas cylinder (71). This is because the load (indicated by the solid arrow in FIG. 8B ) acting from the legs (12b) of the compressor (12) to the intermediate plate (53) due to the impact of the drop is biased to be larger in one region (the rear region (Ar) in this example) on one side of the first straight line (L1), and the direction of displacement of the compressor (12) due to the impact of the drop of the heat source device (1) (the hollow arrow in FIG. 8B ) is shifted from the direction toward the gas cylinder (71) along the first straight line (L1) toward the rear plate (27).

[0091] (5) Features of the Embodiment In the heat source device (1) of this embodiment, when the heat source device (1) is dropped under the condition that the first line (L1) coincides with the direction of gravity, the restricting portion (80) restricts the displacement of the compressor (12) toward the cylinder (71) in a direction away from the first line (L1). Therefore, when the heat source device (1) is dropped under the condition that the first line (L1) coincides with the direction of gravity, the direction of displacement of the compressor (12) due to the impact of the drop deviates from the direction toward the cylinder (71) along the first line (L1). This reduces the impact acting on the cylinder (71) from the compressor (12).

[0092] In the heat source device (1) of this embodiment, the multiple legs (12b) supporting the compressor (12) are arranged asymmetrically with respect to the first line (L1). As a result, as shown in FIG. 8B , when the heat source device (1) is dropped and the first line (L1) coincides with the direction of gravity, the load applied from the legs (12b) of the compressor (12) to the intermediate plate (53) due to the impact of the drop becomes unbalanced between the regions on both sides of the first line (L1), and the degree of deformation of the intermediate plate (53) can be made different between the regions on both sides of the first line (L1). The load applied from the legs (12b) of the compressor (12) to the intermediate plate (53) and the resulting degree of deformation of the intermediate plate (53) are greater in the rear region (Ar) where the legs (12b) closest to the second center of gravity (C2) of the cylinder (71) are located than in the front region (Af). Therefore, the direction in which the compressor (12) is displaced by the impact of the fall can be shifted from the direction along the first straight line (L1) toward the cylinder (71) toward the rear plate (27).

[0093] In the heat source device (1) of this embodiment, the plurality of legs (12b) supporting the compressor (12) are different in size between the regions on one side and the other side of the intermediate plate (53) with respect to the first line (L1). As a result, as shown in FIG. 8B , when the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity, the load acting from the compressor (12) through the legs (12b) on the intermediate plate (53) is greater in the rear region (Ar) on the side of the first line (L1) where the number of legs (12b) is greater. This is advantageous for suitably differentiating the degree of deformation of the intermediate plate (53) between the regions on both sides of the first line (L1) and shifting the direction of displacement of the compressor (12) due to the impact of the drop from the direction along the first line (L1) toward the cylinder (71) toward the rear plate (27).

[0094] In the heat source device (1) of this embodiment, the intermediate plate (53) supporting the compressor (12) and the cylinder (71) from below is installed on the bottom plate (23) via the second elastic support portion (54). This allows the second elastic support portion (54) to suppress vibrations of the compressor (12) during operation. Furthermore, when the heat source device (1) is dropped, the portion of the intermediate plate (53) between the compressor (12) and the cylinder (71) is deformed due to the impact of the drop. Therefore, the kinetic energy of the compressor (12) can be absorbed by the deformation of the intermediate plate (53). Therefore, even if the compressor (12) hits the cylinder (71), the impact acting from the compressor (12) on the cylinder (71) can be reduced.

[0095] In the heat source device (1) of this embodiment, the compressor (12) is surrounded by a sound insulating member (60). The sound insulating member (60) reduces noise generated during operation of the compressor (12). Furthermore, if the heat source device (1) falls, the sound insulating member (60) absorbs the impact acting on the cylinder (71).

[0096] In the heat source device (1) of this embodiment, the entire refrigerant circuit (11), which is a closed circuit, is provided within the casing (21). Therefore, compared to, for example, a separate-type refrigeration cycle device, the amount of refrigerant required to be charged in the refrigerant circuit (11) is smaller, and the size of the cylinder (71) can be reduced. As a result, the rigidity of the cylinder (71) can be increased, and damage to the cylinder (71) can be suppressed.

[0097] (6) Modifications The above embodiment may be modified as follows: The following describes the differences from the above embodiment.

[0098] (6-1) Variation 1 The heat source device (1) of Variation 1 and the heat source device (1) of the above embodiment differ in the direction in which the regulating portion (80) induces displacement of the compressor (12) when the heat source device (1) falls under the condition that the first straight line (L1) is aligned with the direction of gravity.

[0099] The restricting portion (80) of this modified example is configured to guide the displacement of the compressor (12) toward the front plate (26). As shown in Fig. 9 , the support plate (51) is a plate member that is substantially triangular in shape when viewed from above, and is installed with one apex facing rearward and the side opposite the apex facing forward.

[0100] The three legs (12b) of the compressor (12) form a restricting portion (80) and are arranged asymmetrically with respect to the first straight line (L1). In the intermediate plate (53), two legs (12b) are arranged in a region (Af) in front of the first straight line (L1), and one leg (12b) is arranged in a region (Ar) behind the first straight line (L1). The one leg (12b) arranged in the region (Af) in front of the first straight line (L1) is located closest to the second center of gravity (C2) of the cylinder (71) of the three legs (12b) in the direction along the first straight line (L1).

[0101] As shown in Figures 10(A) and 10(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the load (indicated by the solid arrow in Figure 10(B)) acting from the compressor (12) through the legs (12b) on the intermediate plate (53) due to the impact of the drop will be greater in the front region (Af) of the first line (L1) where the number of legs (12b) is greater. This allows the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the hollow arrow in Figure 10(B)) to be shifted from the direction toward the cylinder (71) along the first line (L1) toward the front plate (26). As a result, the impact acting from the compressor (12) on the cylinder (71) can be reduced.

[0102] (6-2) Modification 2 The heat source device (1) of Modification 2 differs from the heat source device (1) of the above embodiment in the shape of the support plate (51) and the number of legs (12b) of the compressor (12).

[0103] As shown in Fig. 11 , the support plate (51) of this modified example is a substantially rectangular plate member, and is provided with two opposing sides, one of which faces forward and the other of which faces rearward. The vibration-proof mechanism (50) of this modified example has four first elastic support members (52). The first elastic support members (52) are respectively disposed near the four tops of the support plate (51). Thus, the compressor (12) is provided with four legs (12b).

[0104] In a top view, the four legs (12b) of the compressor (12) are arranged asymmetrically with respect to the first straight line (L1), but the number of legs (12b) is the same in the regions on one side of the intermediate plate (53) and the other side of the first straight line (L1). Two legs (12b) are arranged in each of the regions (Af) in front of the first straight line (L1) and the region (Ar) behind the first straight line (L1). The leg (12b) arranged in front of the first straight line (L1) is located closest to the second center of gravity (C2) of the cylinder (71) among the four legs (12b) in the direction along the first straight line (L1).

[0105] As shown in Figures 12(A) and 12(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the load (indicated by the solid arrow in Figure 12(B)) exerted by the legs (12b) of the compressor (12) on the intermediate plate (53) due to the impact of the drop, and the resulting degree of deformation of the intermediate plate (53) are greater in the region (Af) forward of the first line (L1) than in the region (Ar) behind it. Therefore, the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the open arrow in Figure 12(B)) can be shifted from the direction toward the cylinder (71) along the first line (L1) toward the front plate (26). As a result, the impact acting from the compressor (12) on the cylinder (71) can be reduced.

[0106] (6-3) Modification 3 The heat source device (1) of Modification 3 differs from the heat source device (1) of the above embodiment in the configuration of the restriction portion (80). The restriction portion (80) of this modification is realized by modifying the configuration of the intermediate plate (53) in addition to the arrangement of the three legs (12b) of the compressor (12).

[0107] 13, the restricting portion (80) is configured by providing a rib (81a) on the intermediate plate (53). The rib (81a) in this example is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in the above embodiment when the heat source device (1) is dropped under the condition that the first straight line (L1) is aligned with the direction of gravity.

[0108] The second line (L2) shown in Figure 13 is defined as a line that, in a top view, is perpendicular to the first line (L1) and passes through the first center of gravity (C1) of the compressor (12). The second line (L2) intersects both the front-rear direction and the left-right direction and extends rightward from the front side to the rear side. The second line (L2) overlaps the left side of the intermediate plate (53) and divides the intermediate plate (53) into two regions.

[0109] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of a region (Af) of the intermediate plate (53) in front of the first straight line (L1). The second region (A2) in this example is a part of a region (Ar) of the intermediate plate (53) in rear of the first straight line (L1). The rib (81a) is provided in the first region (A1) and extends in a direction intersecting with the second straight line (L2).

[0110] The rib (81a) is a part of the intermediate plate (53) that is formed to have an upward convex shape. The rib (81a) may also be a part of the intermediate plate (53) that is formed to have a downward convex shape. The rib (81a) is provided to extend along the first straight line (L1) on the front side between the compressor (12) and the cylinder (71) in a top view. The rib (81a) is provided to extend along the entire front edge of the intermediate plate (53) and a part of the right edge near the front end.

[0111] As shown in Figures 14(A) and 14(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the impact of the drop will cause the compressor (12) to move downward, and a load will be applied from the legs (12b) of the compressor (12) to the intermediate plate (53), causing the intermediate plate (53) to buckle. In this modification, a rib (81a) is provided in the first region (A1) of the intermediate plate (53). The rib (81a) extends in a direction intersecting the second line (L2). The rib (81a) increases the buckling strength of the intermediate plate (53) in the direction along the first line (L1) in the first region (A1) compared to the second region (A2).

[0112] As a result, when the heat source device (1) is dropped and the first line (L1) coincides with the direction of gravity, the second region (A2) of the intermediate plate (53) buckles before the first region (A1) when a load from the compressor (12) is applied to the intermediate plate (53). This allows the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the hollow arrow in FIG. 14(B)) to be shifted from the direction toward the cylinder (71) along the first line (L1) to the rear plate (27). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

[0113] (6-4) Variation 4 The heat source device (1) of Variation 4 and the heat source device (1) of the above embodiment differ in the direction in which the regulating portion (80) induces displacement of the compressor (12) when the heat source device (1) falls under the condition that the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the regulating portion (80).

[0114] The restricting portion (80) of this modification is configured to guide the displacement of the compressor (12) toward the front plate (26). As shown in Fig. 15, the installation state of the support plate (51) of this example and the arrangement of the three legs (12b) of the compressor (12) are the same as those of the first modification.

[0115] The restricting portion (80) is formed by providing a rib (81a) on the intermediate plate (53). The rib (81a) of this example is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in the first modification example when the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity. The second line (L2) shown in FIG. 15 is defined in the same way as in the third modification example.

[0116] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of the region (Ar) of the intermediate plate (53) rearward of the first straight line (L1). The second region (A2) in this example is a part of the region (Af) of the intermediate plate (53) forward of the first straight line (L1). The rib (81a) is provided in the first region (A1) and extends in a direction intersecting with the second straight line (L2).

[0117] The rib (81a) is a part of the intermediate plate (53) that is formed to have an upward convex shape. The rib (81a) may be a part of the intermediate plate (53) that is formed to have a downward convex shape. The rib (81a) is provided to extend in the left-right direction between the water heat exchanger (15) and the cylinder (71) in a top view. The rib (81a) is provided to extend along the entire right edge of the intermediate plate (53) and a part of the rear edge near the right end.

[0118] As shown in Figures 16(A) and 16(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the rib (81a) is provided in the first region (A1) of the intermediate plate (53) in this modified example. Therefore, when a load from the compressor (12) is applied to the intermediate plate (53), the second region (A2) of the intermediate plate (53) buckles before the first region (A1). This allows the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the hollow arrow in Figure 16(B)) to be shifted from the direction toward the gas cylinder (71) along the first line (L1) toward the front plate (26). As a result, the impact acting on the gas cylinder (71) from the compressor (12) can be reduced.

[0119] (6-5) Modification 5 The heat source device (1) of Modification 5 differs from the heat source device (1) of the above embodiment in the configuration of the restriction portion (80). The restriction portion (80) of this modification is realized by modifying the configuration of the intermediate plate (53) in addition to the arrangement of the three legs (12b) of the compressor (12).

[0120] Specifically, as shown in Fig. 17 , the restricting portion (80) is configured by providing a thick portion (81b) that is a partial thickening of the intermediate plate (53). The thick portion (81b) of this example is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in the above embodiment when the heat source device (1) is dropped under the condition that the first line (L1) is aligned with the direction of gravity. The second line (L2) shown in Fig. 17 is defined in the same way as in the third modification.

[0121] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of a region (Af) of the intermediate plate (53) located in front of the first straight line (L1). The second region (A2) in this example is a part of a region (Ar) of the intermediate plate (53) located behind the first straight line (L1).

[0122] The thick portion (81b) in this example is the portion indicated by dot hatching in FIG. 17 and constitutes the entire first region (A1). The thickness of the thick portion (81b) is at least 1.5 times greater than the thickness of other portions of the intermediate plate (53). The thick portion (81b) in this example does not constitute the second region (A2). In other words, the thick portion (81b) is not included in the second region (A2). The thick portion (81b) may constitute only a portion of the first region (A1), or may also constitute a portion of a region other than the first region (A1).

[0123] As shown in Figures 18(A) and 18(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the impact of the drop will cause the compressor (12) to move downward, and a load will be applied from the legs (12b) of the compressor (12) to the intermediate plate (53), causing the intermediate plate (53) to buckle. In this modification, a thick portion (81b) is provided in the first region (A1) of the intermediate plate (53), and the thickness of the intermediate plate (53) is greater in the first region (A1) than in the second region (A2). The buckling strength of the intermediate plate (53) is higher in the thicker portions of the intermediate plate (53).

[0124] Therefore, the buckling strength of the intermediate plate (53) in the direction along the first straight line (L1) is higher in the first region (A1) than in the second region (A2). As a result, when the heat source device (1) is dropped and the first straight line (L1) coincides with the direction of gravity, the second region (A2) of the intermediate plate (53) buckles before the first region (A1) when a load from the compressor (12) is applied to the intermediate plate (53). This allows the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the hollow arrow in FIG. 18(B) ) to be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear plate (27). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

[0125] (6-6) Variation 6 The heat source device (1) of Variation 6 and the heat source device (1) of the above embodiment differ in the direction in which the regulating portion (80) induces displacement of the compressor (12) when the heat source device (1) is dropped under the condition that the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the regulating portion (80).

[0126] The restricting portion (80) of this modification is configured to guide the displacement of the compressor (12) toward the front plate (26). As shown in Fig. 19, the installation state of the support plate (51) of this example and the arrangement of the three legs (12b) of the compressor (12) are the same as those of the first modification.

[0127] The restricting portion (80) is configured by providing a thick portion (81b) that is thicker than other portions of the intermediate plate (53). In this example, the thick portion (81b) is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in Modification 1 when the heat source device (1) is dropped under the condition that the first line (L1) is aligned with the direction of gravity. The second line (L2) shown in FIG. 19 is defined in the same way as in Modification 3.

[0128] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of the region (Ar) of the intermediate plate (53) rearward of the first straight line (L1). The second region (A2) in this example is a part of the region (Af) of the intermediate plate (53) forward of the first straight line (L1).

[0129] The thick portion (81b) of this example is the portion indicated by dot hatching in FIG. 19 and constitutes the entire first region (A1). The thickness of the thick portion (81b) is the same as the thickness of the thick portion (81b) of the fifth modified example. The thick portion (81b) does not constitute the second region (A2). In other words, the second region (A2) does not include the thick portion (81b). The thick portion (81b) may constitute only a portion of the first region (A1), or may also constitute a portion of a region other than the first region (A1).

[0130] As shown in Figures 20(A) and 20(B), if the heat source device (1) falls with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, in this modified example, the thickness of the intermediate plate (53) is greater in the first region (A1) than in the second region (A2). Therefore, when a load from the compressor (12) is applied to the intermediate plate (53), the second region (A2) of the intermediate plate (53) buckles before the first region (A1). This allows the direction of displacement of the compressor (12) due to the impact of the fall (indicated by the hollow arrow in Figure 20(B)) to be shifted from the direction toward the cylinder (71) along the first line (L1) toward the front plate (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

[0131] (6-7) Modification 7 The heat source device (1) of Modification 7 differs from the heat source device (1) of the above embodiment in the configuration of the restriction portion (80). The restriction portion (80) of this modification is realized by modifying the configuration of the intermediate plate (53) in addition to the arrangement of the three legs (12b) of the compressor (12).

[0132] Specifically, as shown in Fig. 21 , the restricting portion (80) is configured by providing a high-strength portion (81c) on the intermediate plate (53) that has a higher strength than other portions. The high-strength portion (81c) of this example is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in the above embodiment when the heat source device (1) is dropped under the condition that the first line (L1) is aligned with the direction of gravity. The second line (L2) shown in Fig. 21 is defined in the same way as in the third modification.

[0133] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of a region (Af) of the intermediate plate (53) located in front of the first straight line (L1). The second region (A2) in this example is a part of a region (Ar) of the intermediate plate (53) located behind the first straight line (L1).

[0134] The high-strength portion (81c) in this example is the portion indicated by diagonal hatching in FIG. 21 and constitutes the entire first region (A1). The high-strength portion (81c) in this example does not constitute the second region (A2). In other words, the high-strength portion (81c) is not included in the second region (A2). The high-strength portion (81c) and other portions of the intermediate plate (53) are formed of different materials. For example, the high-strength portion (81c) of the intermediate plate (53) is formed of carbon steel, while the other portions are formed of spheroidal graphite cast iron. The Young's modulus of the material constituting the intermediate plate (53) is greater in the first region (A1) than in the second region (A2). The high-strength portion (81c) may constitute only a portion of the first region (A1), or may also constitute a portion of regions other than the first region (A1).

[0135] As shown in Figures 22(A) and 22(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the impact of the drop will cause the compressor (12) to move downward, and a load will be applied from the legs (12b) of the compressor (12) to the intermediate plate (53), causing the intermediate plate (53) to buckle. In this modification, a high-strength portion (81c) is provided in the first region (A1) of the intermediate plate (53), and the Young's modulus of the material of the intermediate plate (53) is higher in the first region (A1) than in the second region (A2). The buckling strength of the intermediate plate (53) is higher in portions of the intermediate plate (53) where the Young's modulus of the material is higher.

[0136] Therefore, the buckling strength of the intermediate plate (53) in the direction along the first straight line (L1) is higher in the first region (A1) than in the second region (A2). As a result, when the heat source device (1) is dropped and the first straight line (L1) coincides with the direction of gravity, the second region (A2) of the intermediate plate (53) buckles before the first region (A1) when a load from the compressor (12) is applied to the intermediate plate (53). This allows the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the hollow arrow in FIG. 22(B) ) to be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear plate (27). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

[0137] (6-8) Variation 8 The heat source device (1) of Variation 8 and the heat source device (1) of the above embodiment differ in the direction in which the regulating portion (80) induces displacement of the compressor (12) when the device is dropped under the condition that the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the regulating portion (80).

[0138] The restricting portion (80) of this modification is configured to guide the displacement of the compressor (12) toward the front plate (26). As shown in Fig. 23 , the installation state of the support plate (51) of this example and the arrangement of the three legs (12b) of the compressor (12) are the same as those of the first modification.

[0139] The restricting portion (80) is configured by providing a high-strength portion (81c) that partially increases the strength of the intermediate plate (53). The high-strength portion (81c) of this example is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in Modification Example 1 when the heat source device (1) is dropped under the condition that the first straight line (L1) is aligned with the direction of gravity. The second straight line (L2) shown in FIG. 23 is defined in the same way as in Modification Example 3.

[0140] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of a region (Af) of the intermediate plate (53) located in front of the first straight line (L1). The second region (A2) in this example is a part of a region (Ar) of the intermediate plate (53) located behind the first straight line (L1).

[0141] The high-strength portion (81c) of this example is the portion hatched in FIG. 23 and constitutes the entire first region (A1). The materials constituting the high-strength portion (81c) and other portions of the intermediate plate (53) are the same as those in the seventh modification. The high-strength portion (81c) does not constitute the second region (A2). In other words, the high-strength portion (81c) is not included in the second region (A2). The high-strength portion (81c) may constitute only a portion of the first region (A1), or may also constitute a portion of a region other than the first region (A1).

[0142] As shown in Figures 24(A) and 24(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, in this modified example, the Young's modulus of the material of the intermediate plate (53) is greater in the first region (A1) than in the second region (A2). Therefore, when a load from the compressor (12) is applied to the intermediate plate (53), the second region (A2) of the intermediate plate (53) buckles before the first region (A1). This allows the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the hollow arrow in Figure 24(B)) to be shifted from the direction toward the cylinder (71) along the first line (L1) toward the front plate (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

[0143] (6-9) Modification 9 The heat source device (1) of Modification 9 differs from the heat source device (1) of the above embodiment in the configuration of the restriction portion (80). The restriction portion (80) of this modification is realized by modifying the configuration of the intermediate plate (53) in addition to the arrangement of the three legs (12b) of the compressor (12).

[0144] Specifically, as shown in Fig. 25 , the restricting portion (80) is configured by forming an opening (53d) in the intermediate plate (53). The opening (53d) in this example is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in the above embodiment when the heat source device (1) is dropped under the condition that the first line (L1) is aligned with the direction of gravity. The second line (L2) shown in Fig. 25 is defined in the same way as in the third modification.

[0145] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of a region (Af) of the intermediate plate (53) in front of the first straight line (L1). The second region (A2) in this example is a part of a region (Ar) of the intermediate plate (53) in back of the first straight line (L1). The opening (53d) is provided in the second region (A2) and passes through the intermediate plate (53).

[0146] The opening (53d) is formed in the shape of a slit extending in a direction intersecting the first straight line (L1). In a top view, the opening (53d) extends in the front-rear direction from between the compressor (12) and the cylinder (71) to between the compressor (12) and the water heat exchanger (15). The opening (53d) corresponds, in the direction along the first straight line (L1), to the leg (12b) of the compressor (12) that is located in the second region (A2) of the intermediate plate (53). As shown in FIG. 25 , there may be one opening (53d) or multiple openings (53d).

[0147] As shown in Figures 26(A) and 26(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the impact of the drop will cause the compressor (12) to move downward, and a load will be applied from the legs (12b) of the compressor (12) to the intermediate plate (53), causing the intermediate plate (53) to buckle. In this modification, an opening (53d) is formed in the second region (A2) of the intermediate plate (53). This opening (53d) penetrates the intermediate plate (53). The buckling strength of the intermediate plate (53) is reduced in the region where the opening (53d) is located.

[0148] Therefore, the buckling strength of the intermediate plate (53) in the direction along the first straight line (L1) is lower in the second region (A2) than in the first region (A1). As a result, when the heat source device (1) is dropped and the first straight line (L1) coincides with the direction of gravity, the second region (A2) of the intermediate plate (53) buckles before the first region (A1) when a load from the compressor (12) is applied to the intermediate plate (53). This allows the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the hollow arrow in FIG. 26(B) ) to be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear plate (27). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

[0149] (6-10) Modification 10 The heat source device (1) of modification 10 and the heat source device (1) of the above embodiment differ in the direction in which the regulating portion (80) induces displacement of the compressor (12) when the heat source device (1) is dropped under the condition that the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the regulating portion (70).

[0150] The restricting portion (80) of this modification is configured to guide the displacement of the compressor (12) toward the front plate (26). As shown in Fig. 27 , the installation state of the support plate (51) of this example and the arrangement of the three legs (12b) of the compressor (12) are the same as those of the first modification.

[0151] The restricting portion (80) is configured by forming an opening (53d) in the intermediate plate (53). In this example, the opening (53d) is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in Modification 1 when the heat source device (1) is dropped under the condition that the first line (L1) is aligned with the direction of gravity. The second line (L2) shown in FIG. 27 is defined in the same way as in Modification 3.

[0152] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of the region (Ar) of the intermediate plate (53) rearward of the first straight line (L1). The second region (A2) in this example is a part of the region (Af) of the intermediate plate (53) forward of the first straight line (L1). The opening (53d) is provided in the first region (A1) and passes through the intermediate plate (53).

[0153] The opening (53d) is formed in the shape of a slit extending in a direction intersecting the first straight line (L1). In a top view, the opening (53d) extends in the front-rear direction from the front edge of the intermediate plate (53) to span between the compressor (12) and the cylinder (71) and opens at the front edge of the intermediate plate (53). The opening (53d) corresponds, in the direction along the first straight line (L1), to one of the three leg portions (12b) of the compressor (12) that is located in the second region (A2) of the intermediate plate (53). As shown in FIG. 27 , the number of openings (53d) may be one, or multiple openings (53d) may be formed.

[0154] As shown in Figures 28(A) and 28(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, an opening (53d) is formed in the second region (A2) of the intermediate plate (53) in this modified example. Therefore, when a load from the compressor (12) is applied to the intermediate plate (53), the second region (A2) of the intermediate plate (53) buckles before the first region (A1). This allows the direction of displacement of the compressor (12) due to the impact of the drop (indicated by the hollow arrow in Figure 28(B)) to be shifted from the direction toward the cylinder (71) along the first line (L1) toward the front plate (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

[0155] (6-11) Modification 11 The heat source device (1) of Modification 11 differs from the heat source device (1) of the above embodiment in the configuration of the restriction portion (80). As shown in Fig. 29 , the restriction portion (80) of this modification is configured by specially arranging the three legs (12b) of the compressor (12) and by including a support member (82). The second line (L2) shown in Fig. 29 is defined in the same way as in Modification 3.

[0156] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of the region (Af) of the intermediate plate (53) in front of the first straight line (L1). The second region (A2) in this example is a part of the region (Ar) of the intermediate plate (53) in back of the first straight line (L1). The support member (82) in this example supports the compressor (12) relative to the intermediate plate (53).

[0157] The support member (82) is a long plate member made of steel, such as an angle bar. The support member (82) is located on the cylinder (71) side of the compressor (12) and is provided in the first region (A1) of the intermediate plate (53). In a top view, the support member (82) extends in a direction intersecting the first line (L1) and the second line (L2) and extends forward (i.e., right-front) from the compressor (12) side toward the cylinder (71) side. One end of the support member (82) is fixed to the outer peripheral surface of the compressor (12). The other end of the support member (82) is fixed to the upper surface of the intermediate plate (53).

[0158] 30(A) and 30(B), if the heat source device (1) is dropped with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the impact of the drop will cause the compressor (12) to move downward. In this modification, a support member (82) is provided on the cylinder (71) side of the compressor (12). The support member (82) extends in a direction intersecting the first line (L1) in a top view and supports the compressor (12) on an intermediate plate (53) installed on the bottom plate (23).

[0159] When the heat source device (1) is dropped under the condition that the first line (L1) coincides with the direction of gravity, the support member (82) is interposed between the compressor (12) and the intermediate plate (53), and thus a force is applied from the support member (82) to the compressor (12) in a direction different from the direction toward the cylinder (71). This makes it possible to shift the direction in which the compressor (12) is displaced by the impact of the drop (indicated by the hollow arrow in FIG. 30(B) ) from the direction toward the cylinder (71) along the first line (L1). As a result, the impact acting from the compressor (12) on the cylinder (71) can be reduced.

[0160] (6-12) Modification 12 The heat source device (1) of Modification 4 and the heat source device (1) of the above embodiment differ in the direction in which the regulating portion (80) induces displacement of the compressor (12) when the device is dropped under the condition that the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the regulating portion (80).

[0161] The restricting portion (80) of this modification is configured to guide the displacement of the compressor (12) toward the front plate (26). As shown in Figure 31, the installation state of the support plate (51) of this example and the arrangement of the three legs (12b) of the compressor (12) are the same as those of the first modification.

[0162] The restricting portion (80) includes a support member (82). The support member (82) of this example is provided so as to displace the compressor (12) to the same side as the side displaced by the arrangement of the three legs (12b) in Modification Example 1 when the heat source device (1) is dropped under the condition that the first line (L1) is aligned with the direction of gravity. The second line (L2) shown in FIG. 31 is defined in the same way as in Modification Example 3.

[0163] The intermediate plate (53) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) in this example is a part of the region (Ar) of the intermediate plate (53) rearward of the first straight line (L1). The second region (A2) in this example is a part of the region (Af) of the intermediate plate (53) forward of the first straight line (L1). The support member (82) in this example supports the compressor (12) relative to the peripheral wall (21a) of the casing (21).

[0164] The support member (82) is a long plate member made of steel, such as an angle bar. The support member (82) is located on the cylinder (71) side of the compressor (12) and is provided in the first region (A1) of the intermediate plate (53). In a top view, the support member (82) extends in a direction intersecting the first line (L1) and the second line (L2), extends from the compressor (12) side through the rear side of the cylinder (71) to the right (strictly speaking, the right rear side), and penetrates the right wall (62) of the sound insulation member (60). One end of the support member (82) is fixed to the outer peripheral surface of the compressor (12). The other end of the support member (82) is fixed to the inner surface of the right plate (24).

[0165] As shown in Figures 32(A) and 32(B), if the heat source device (1) falls with the first line (L1) aligned with the direction of gravity and the casing (21) comes into contact with the ground (G) in this state, the support member (82) is provided on the cylinder (71) side of the compressor (12) in this modified example. Therefore, the support member (82) is interposed between the peripheral wall (21a) of the casing (21) and the compressor (12), and a force is applied from the support member (82) to the compressor (12) in a direction different from the direction toward the cylinder (71). This allows the direction of displacement of the compressor (12) due to the impact of the fall (indicated by the hollow arrow in Figure 32(B)) to be shifted from the direction toward the cylinder (71) along the first line (L1) toward the front plate (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

[0166] (6-13) Modification 13 As shown in FIG. 33 , in a heat source device (1) of Modification 13, the outdoor unit (20) further includes a sound-absorbing material (90). The sound-absorbing material (90) has a function of attenuating sound. The sound-absorbing material (90) is a resin material having open cells, such as urethane. The sound-absorbing material (90) is arranged so as to overlap the outer surface or the inner surface of the casing (21).

[0167] Specifically, the sound-absorbing material (90) is formed on the inside of each of the top wall (61), right wall (62), left wall (63), front wall (64), and rear wall (65) of the sound-insulating member (60). Use of the sound-absorbing material (90) improves the effect of reducing noise in the machine room (S2). The sound-absorbing material (90) reduces the impact when the cylinder (71) hits the ground (G) when the heat source device (1) falls. 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).

[0168] (7) Other Embodiments As shown in FIG. 34 , the vibration-isolating mechanism (50) does not necessarily have to include the intermediate plate (53) and the second elastic support member (54). For example, the vibration-isolating mechanism (50) may be configured with a support plate (51) and three first elastic support members (52). The support plate (51) is fixed to the top of the bottom plate (23) via the three first elastic support members (52). Each first elastic support member (52) is fixed to the top of the bottom plate (23) and supports the support plate (51) from below. The compressor (12) is supported from below by the support plate (51). In this case, the plate member (81) constituting the restricting portion (80) is made of the bottom plate (23).

[0169] In the heat source device (1) of the above embodiment, when the plate member (81) is made of the bottom plate (23), the three legs (12b) are arranged asymmetrically with respect to the first straight line (L1) in top view. This is also true for the heat source devices (1) of the above Modifications 1 and 2. In the heat source device (1) of Modification 1, even when the plate member (81) is made of the bottom plate (23), the number of legs (12b) differs between the region on one side of the bottom plate (23) and the region on the other side of the first straight line (L1).

[0170] In the heat source device (1) of the third modified example, when the plate member (81) is a bottom plate (23), the bottom plate (23) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2). The first region (A1) is a region (Af) in front of the first straight line (L1). A rib (81a) extending in a direction intersecting the second straight line (L2) is provided in the first region (A1). This is also true for the heat source device (1) of the fourth modified example.

[0171] In the heat source device (1) of the fifth modified example, when the plate member (81) is a bottom plate (23), the bottom plate (23) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2). The first region (A1) is a region (Af) in front of the first straight line (L1). A thick portion (81b) that is thicker than other portions is provided in the first region (A1), and the thickness of the bottom plate (23) is greater in the first region (A1) than in the second region (A2). This is also true in the sixth modified example.

[0172] In the heat source device (1) of the seventh modified example, when the plate member (81) is a bottom plate (23), the bottom plate (23) has, in a top view, a first region (A1) and a second region (A2) defined by a first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2). The first region (A1) is a region (Af) forward of the first straight line (L1). A high-strength portion (81c) having a higher strength than other portions is provided in the first region (A1). The high-strength portion (81c) and other portions of the bottom plate (23) are formed of different materials, and the Young's modulus of the material of the bottom plate (23) is higher in the first region (A1) than in the second region (A2). This is also true for the heat source device (1) of the eighth modified example.

[0173] In the heat source device (1) of the ninth modified example, when the plate member (81) is a bottom plate (23), the bottom plate (23) has, in a top view, a first region (A1) and a second region (A2) defined by a first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2). The first region (A1) is a region (Af) in front of the first straight line (L1). An opening (81d) penetrating the bottom plate (23) is provided in the first region (A1). The same applies to the heat source device (1) of the tenth modified example.

[0174] In the heat source device (1) of the eleventh modification, when the plate member (81) is a bottom plate (23), the bottom plate (23) has, in a top view, a first region (A1) and a second region (A2) defined by the first straight line (L1) on the cylinder (71) side of the second straight line (L2). The first region (A1) is a region (Af) in front of the first straight line (L1). A support member (82) is provided in the first region (A1) and supports the compressor (12) against the peripheral wall (21a) of the casing (21) or the bottom plate (23). The same applies to the heat source device (1) of the twelfth modification.

[0175] In the heat source device (1) of the above-described Modifications 3 to 12, the legs (12b) may be arranged symmetrically with respect to the first straight line (L1) in a top view. The restricting portion (80) may have any configuration other than those of the above-described embodiment and Modifications 1 to 12, as long as the restricting portion (80) restricts the displacement of the compressor (12) toward the cylinder (71) in a direction deviating from the first straight line (L1) under the condition that the first straight line (L1) coincides with the direction of gravity.

[0176] The intermediate plate (53) may support only the compressor (12) and the filling unit (70) from below. In this case, the water heat exchanger (15) and the accumulator (17) may be directly supported on the bottom plate (23) of the casing (21).

[0177] 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.

[0178] The sound insulating member (60) may cover only the compressor (12).

[0179] Although the embodiments and modifications have been described above, it will be understood that various modifications in form and details are possible without departing from the spirit and scope of the claims. Furthermore, the above embodiments and modifications may be combined or substituted as appropriate as long as the functionality of the subject matter of the present disclosure is not impaired.

[0180] In addition, the terms "first," "second," "third," etc. in the specification and claims are used to distinguish the terms to which these terms are attached, and do not limit the number or order of the terms.

[0181] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for heat source devices.

[0182] A1 First region A2 Second region C1 First center of gravity (center of gravity of compressor) C2 Second center of gravity (center of gravity of cylinder) L1 First straight line L2 Second straight line 1 Heat source device 11 Refrigerant circuit 12 Compressor 12a Leg 20 Outdoor unit 21 Casing 23 Bottom plate 53 Intermediate plate 53a Rib 53d Opening 54 Second elastic support portion (elastic support portion) 60 Sound insulation member 71 Cylinder 71a Discharge port 80 Restriction portion 81 Plate member 82 Support member 90 Sound absorbing material

Claims

1. A heat source device comprising: a compressor (12) 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 an outlet (71a) at a lower part thereof for discharging the flammable refrigerant; a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are placed; and a restricting part (80) that restricts a direction of displacement of the compressor (12) when the heat source device is dropped, wherein a first straight line (L1) is defined as a straight line passing through a center of gravity (C1) of the compressor (12) and a center of gravity (C2) of the cylinder (71) in a top view in which the bottom plate (23) is seen from above with the heat source device installed; The regulating part (80) restricts the displacement of the compressor (12) toward the cylinder (71) in a direction away from the first straight line (L1), provided that the first straight line (L1) coincides with the direction of gravity, in a heat source device.

2. The heat source device according to claim 1, wherein the restriction portion (80) includes a plate member (81) made of the bottom plate (23) or an intermediate plate (53) placed on the bottom plate (23), and a plurality of legs (12b) fixed to the plate member (81) and supporting the compressor (12) from below, and the plurality of legs (12b) are arranged asymmetrically with respect to the first straight line (L1) in the top view.

3. A heat source device according to claim 2, wherein, in the top view, the number of legs (12b) is different in one region of the plate member (81) and the other region of the plate member (81) separated by the first straight line (L1).

4. A heat source device according to any one of claims 1 to 3, wherein the regulating portion (80) is configured to include a plate member (81) that supports the compressor (12) from below, the second straight line (L2) is defined as a straight line perpendicular to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12), the plate member (81) is an intermediate plate (53) installed on the bottom plate (23) or the bottom plate (23), and in the top view, it has a first region (A1) and a second region (A2) that are demarcated by the first straight line (L1) on the cylinder (71) side of the second straight line (L1), and the first region (A1) is provided with a rib (53a) extending in a direction intersecting the second straight line (L2).

5. A heat source device according to any one of claims 1 to 4, wherein the regulating portion (80) is configured to include a plate member (81) that supports the compressor (12) from below, the second straight line (L2) is defined as a straight line perpendicular to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12), the plate member (81) is an intermediate plate (53) installed on the bottom plate (23) or the bottom plate (23), and in the top view, it has a first region (A1) and a second region (A2) that are demarcated by the first straight line (L1) on the cylinder (71) side of the second straight line (L2), and the thickness of the plate member (81) is greater in the first region (A1) than in the second region (A2).

6. A heat source device according to any one of claims 1 to 5, wherein the regulating portion (80) is configured to include a plate member (81) that supports the compressor (12) from below, the second straight line (L2) is defined as a straight line perpendicular to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12), the plate member (81) is an intermediate plate (53) installed on the bottom plate (23) or the bottom plate (23), and in the top view, it has a first region (A1) and a second region (A2) demarcated by the first straight line (L2) on the cylinder (71) side of the second straight line (L2), and the Young's modulus of the material making up the plate member (81) is greater in the first region (A1) than in the second region (A2).

7. The heat source device according to any one of claims 1 to 6, wherein the restriction portion (80) includes a plate member (81) supporting the compressor (12) from below, wherein a second straight line (L2) is defined as a line perpendicular to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12), wherein the plate member (81) is an intermediate plate (53) installed on the bottom plate (23) or the bottom plate (23), and wherein the plate member (81) has a first region (A1) and a second region (A2) defined by the first straight line (L1) on the side of the cylinder (71) relative to the second straight line (L2), and wherein an opening (53d) penetrating the plate member (81) is formed in the second region (A2).

8. The heat source device according to any one of claims 1 to 7, wherein the restriction portion (80) includes a support member (82) that supports the compressor (12) against an intermediate plate (53) placed on the bottom plate (23), the bottom plate (23), or the peripheral wall (21a) of the casing (21), and the support member (82) is located on the cylinder (71) side of the compressor (12) and extends in a direction intersecting the first straight line (L1) in the top view.

9. A heat source device according to any one of claims 1 to 8, further comprising: an intermediate plate (53) that supports the compressor (12) and the cylinder (71) from below; and an elastic support part (54) fixed on the bottom plate (23) and supporting the intermediate plate (53) from below.

10. A heat source device according to any one of claims 1 to 9, further comprising a sound-insulating member (60) surrounding the compressor (12).

11. A heat source device according to any one of claims 1 to 10, further comprising a sound-absorbing material (90) arranged to overlap the outer or inner surface of the casing (21).

12. A heat source device according to any one of claims 1 to 11, wherein the casing (21) houses the entire refrigerant circuit (11).

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