EP4729843A1

EP4729843A1 - Heat source device

Info

Publication number: EP4729843A1
Application number: EP25828493.4A
Authority: EP
Inventors: Haruki Nakashima; Yasuhiko Oka; Hideho SAKAGUCHI
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2024-09-09
Filing date: 2025-07-01
Publication date: 2026-04-22
Also published as: JP2026049882A; WO2026053564A1

Abstract

A heat source apparatus (1) includes: a cylinder (71) storing a flammable refrigerant and having, in a lower portion, a discharge port (71a) through which the flammable refrigerant is discharged; a casing (21) having a bottom plate (23) on which a compressor (12) and the cylinder are installed; and a restriction portion (80) configured to restrict a direction of displacement of the compressor when the heat source apparatus falls. In a top view with the heat source apparatus installed, a first straight line (L1) is defined as a straight line passing through a center of gravity (C1) of the compressor and a center of gravity (C2) of the cylinder. The restriction portion is configured to restrict the displacement of the compressor toward the cylinder to a direction deviating from the first straight line under a condition in which the first straight line is aligned with a direction of gravity.

Description

TECHNICAL FIELD

The present disclosure relates to a heat source apparatus.

BACKGROUND ART

Patent Document 1 discloses a heat source apparatus including a compressor connected to a refrigerant circuit. The compressor is installed on a bottom plate in a casing of the heat source apparatus.

CITATION LIST

PATENT DOCUMENT

Patent Document 1: Japanese Unexamined Patent Publication No. 2013-155921

SUMMARY OF THE INVENTION

TECHNICAL PROBLEM

The inventors of this application have created a configuration in which a cylinder is provided in the casing of a heat source apparatus. The cylinder stores refrigerant with which a refrigerant circuit is to be filled. Thus, when the heat source apparatus is installed, the refrigerant circuit can be filled with the refrigerant from the cylinder. This eliminates the need for separately preparing refrigerant for filling the circuit. On the other hand, the following typical problem occurs in a configuration in which flammable refrigerant is used as the refrigerant and the cylinder is provided in the casing.
During transportation of the heat source apparatus before installation on site, there is a risk that the heat source apparatus may fall. Here, the compressor and the cylinder are provided in the casing. When the heat source apparatus falls to the ground, the heat source apparatus may contact the ground with the compressor and the cylinder aligned in a straight line in the direction of gravity. In this case, if the compressor collides with the cylinder due to the impact of the fall, the cylinder may be damaged, and the refrigerant may leak into the air.
It is an object of the present disclosure to reduce the impact of a compressor colliding with a cylinder when a heat source apparatus falls.

SOLUTION TO THE PROBLEM

A first aspect of the present disclosure is directed to a heat source apparatus (1). The heat source apparatus (1) includes: a compressor (12) included in a refrigerant circuit (11) configured to perform a refrigeration cycle; a cylinder (71) storing a flammable refrigerant for filling the refrigerant circuit (11), the cylinder (71) having, in a lower portion, a discharge port (71a) through which the flammable refrigerant is discharged; a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are installed; and a restriction portion (80) configured to restrict a direction of displacement of the compressor (12) when the heat source apparatus (1) falls. In a top view, viewing the bottom plate (23) from above with the heat source apparatus (1) installed, a first straight line (L1) is defined as a straight line passing through a center of gravity (C1) of the compressor (23) and a center of gravity (C2) of the cylinder (71). The restriction portion (80) is configured to restrict the displacement of the compressor (23) toward the cylinder (71) to a direction deviating from the first straight line (L1) under a condition in which the first straight line (L1) is aligned with a direction of gravity.
According to the first aspect, the restriction portion (80) restricts the displacement of the compressor (12) toward the cylinder (71) to the direction deviating from the first straight line (L1) at the moment of the fall under the condition in which the first straight line (L1) is aligned with the direction of gravity. The first straight line (L1) is a straight line passing through the center of gravity (C1) of the compressor (12) and the center of gravity (C2) of the cylinder (71) in the top view, viewing the bottom plate (23) from above with the heat source apparatus (1) installed. Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the direction of displacement of the compressor (12) due to the impact of the fall deviates from the direction toward the cylinder (71) along the first straight line (L1). Therefore, the impact acting on the cylinder (71) from the compressor (12) can be reduced.
A second aspect of the present disclosure is an embodiment of the heat source apparatus (1) of the first aspect. In the second aspect, the restriction portion (80) includes a panel member (81) formed of an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and multiple legs (12b) fixed to the panel member (81) and supporting the compressor (12) from below. In the top view, the multiple legs (12b) are disposed asymmetrically with respect to the first straight line (L1).
According to the second aspect, the multiple legs (12b) supporting the compressor (12) are disposed asymmetrically with respect to the first straight line (L1). Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the load applied from the legs (12b) of the compressor (12) to the panel member (81) due to the impact of the fall becomes imbalanced between the areas on both sides of the first straight line (L1), causing the degree of deformation of the panel member (81) to differ between the areas on both sides of the first straight line (L1). Thus, the direction of displacement of the compressor (12) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1).
A third aspect of the present disclosure is an embodiment of the heat source apparatus (1) of the second aspect. In the third aspect, in the top view, the number of legs (12b) differs between an area on one side of the panel member (81) and an area on the other side, divided by the first straight line (L1).
According to the third aspect, the multiple legs (12b) supporting the compressor (12) differs between the area on one side of the panel member (81) and the area on the other side, divided by the first straight line (L1). According to this configuration, when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the load applied from the compressor (12) to the panel member (81) through the legs (12b) becomes greater in the area divided by the first straight line (L1), where a larger number of legs (12b) are disposed. This is advantageous in causing the degree of deformation of the panel member (81) to differ appropriately between the areas on both sides of the first straight line (L1), and shifting the direction of displacement of the compressor (12) due to the impact of the fall from the direction toward the cylinder (71) along the first straight line (L1).
A fourth aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to third aspects. In the fourth aspect, the restriction portion (80) is configured to include a panel member (81) supporting the compressor (12) from below. A second straight line (L2) is defined as a straight line orthogonal to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12). The panel member (81) is an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and has a first area (A1) and a second area (A2) divided by the first straight line (L1) on a side closer to the cylinder (71) than the second straight line (L2) in the top view. The first area (A1) is provided with a rib (53a) extending in a direction intersecting the second straight line (L2).
According to the fourth aspect, the rib (81a) is provided in the first area (A1) of the panel member (81). The rib (81a) extends in the direction intersecting the second straight line (L2). The rib (81a) increases the buckling strength of the panel member (81) in the direction along the first straight line (L1) more in the first area (A1) than in the second area (A2). Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the second area (A2) of the panel member (81) buckles before the first area (A1) when the load from the compressor (12) is applied to the panel member (81). Thus, the direction of displacement of the compressor (12) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1).
A fifth aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to fourth aspects. In the fifth aspect, the restriction portion (80) is configured to include a panel member (81) supporting the compressor (12) from below. A second straight line (L2) is defined as a straight line orthogonal to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12). The panel member (81) is an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and has a first area (A1) and a second area (A2) divided by the first straight line (L1) on a side closer to the cylinder (71) than the second straight line (L2) in the top view. A thickness of the panel member (81) is greater in the first area (A1) than in the second area (A2).
According to the fifth aspect, a thickness of the panel member (81) is greater in the first area (A1) than in the second area (A2). The buckling strength of the panel member (81) increases as the thickness of the panel member (81) increases. Thus, the buckling strength of the panel member (81) in the direction along the first straight line (L1) is greater in the first area (A1) than in the second area (A2). Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the second area (A2) of the panel member (81) buckles before the first area (A1) when the load from the compressor (12) is applied to the panel member (81). Thus, the direction of displacement of the compressor (12) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1).
A sixth aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to fifth aspects. In the sixth aspect, the restriction portion (80) is configured to include a panel member (81) supporting the compressor (12) from below. A second straight line (L2) is defined as a straight line orthogonal to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12). The panel member (81) is an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and has a first area (A1) and a second area (A2) divided by the first straight line (L1) on a side closer to the cylinder (71) than the second straight line (L2) in the top view. A Young's modulus of a material of the panel member (81) is greater in the first area (A1) than in the second area (A2).
According to the sixth aspect, the Young's modulus of a material of the panel member (81) is greater in the first area (A1) than in the second area (A2). The buckling strength of the panel member (81) increases as the Young's modulus of the material of the panel member (81) increases. Thus, the buckling strength of the panel member (81) in the direction along the first straight line (L1) is greater in the first area (A1) than in the second area (A2). Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the second area (A2) of the panel member (81) buckles before the first area (A1) when the load from the compressor (12) is applied to the panel member (81). Thus, the direction of displacement of the compressor (12) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1).
A seventh aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to sixth aspects. In the seventh aspect, the restriction portion (80) is configured to include a panel member (81) supporting the compressor (12) from below. A second straight line (L2) is defined as a straight line orthogonal to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12). The panel member (81) is an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and has a first area (A1) and a second area (A2) divided by the first straight line (L1) on a side closer to the cylinder (71) than the second straight line (L2) in the top view. The second area (A2) has an opening (81d) penetrating the panel member (81).
According to the seventh aspect, the opening (81d) is formed in the second area (A2) of the panel member (81). The opening (81d) penetrates the panel member (81). The buckling strength of the panel member (81) is lower in the area where the opening (81d) is formed. Thus, the buckling strength of the panel member (81) in the direction along the first straight line (L1) is lower in the second area (A2) than in the first area (A1). Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the second area (A2) of the panel member (81) buckles before the first area (A1) when the load from the compressor (12) is applied to the panel member (81). Thus, the direction of displacement of the compressor (12) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1).
An eighth aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to seventh aspects. In the eighth aspect, the restriction portion (80) is configured to include a support member (82) supporting the compressor (12) on an intermediate panel (53) installed on the bottom plate (23), the bottom plate (23), or a peripheral wall (21a) of the casing (21). The support member (82) is located on a side of the compressor (12) closer to the cylinder (71), and extends in a direction intersecting the first straight line (L1) in the top view.
According to the eighth aspect, the support member (82) is provided on the side of the compressor (12) closer to the cylinder (71). The support member (82) extends in the direction intersecting the first straight line (L1) in top view, and supports the compressor (12) on the intermediate panel (53) installed on the bottom plate (23), the bottom plate (23), or the peripheral wall (21a) of the casing (21). When the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, a force in a direction different from the direction toward the cylinder (71) is applied from the support member (82) to the compressor (12), because the support member (82) is interposed between the compressor (12) and the intermediate panel (53), the bottom plate (23), or the peripheral wall (21a) of the casing (21). Thus, the direction of displacement of the compressor (12) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1).
A ninth aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to eighth aspects. In the ninth aspect, the heat source apparatus (1) further includes: an intermediate panel (53) supporting the compressor (12) and the cylinder (71) from below; and an elastic support portion (54) fixed on the bottom plate (23) and supporting the intermediate panel (53) from below.
According to the ninth aspect, the intermediate panel (53) supporting the compressor (12) and the cylinder (71) from below is installed on the bottom plate (23) via the elastic support portion (54). Thus, the vibration during the operation of the compressor (12) is reduced by the elastic support portion (54). Further, when the heat source apparatus (1) falls, a portion of the intermediate panel (53) between the compressor (12) and the cylinder (71) is deformed by the impact of the fall. The deformation of the intermediate panel (53) can absorb the kinetic energy of the compressor (12), and therefore, the impact acting on the cylinder (71) from the compressor (12) can be reduced even when the compressor (12) contacts the cylinder (71).
A tenth aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to ninth aspects. In the tenth aspect, the heat source apparatus (1) further includes a sound insulation member (60) surrounding the compressor (12).
According to the tenth aspect, the compressor (12) is surrounded by the sound insulation member (60). When the heat source apparatus (1) falls, the sound insulation member (60) reduces the impact acting on the cylinder (71).
An eleventh aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to tenth aspects. In the eleventh aspect, the heat source apparatus (1) further includes a sound-absorbing material (90) disposed so as to overlap an outer surface or an inner surface of the casing (21).
According to the eleventh aspect, the sound-absorbing material (90) is disposed so as to overlap the outer surface or inner surface of the casing (21). When the heat source apparatus (1) falls, the sound-absorbing material (90) reduces the impact acting on the cylinder (71).
A twelfth aspect of the present disclosure is an embodiment of the heat source apparatus (1) of any one of the first to eleventh aspects. In the twelfth aspect, the casing (21) houses an entirety of the refrigerant circuit (11).
According to the twelfth aspect, the entirety of the refrigerant circuit (11), which is the closed circuit, is provided in the casing (21). Thus, for example, as compared with a separate type refrigeration cycle apparatus, the amount of refrigerant required to fill the refrigerant circuit (11) is reduced, allowing the cylinder (71) to be downsized. As a result, the rigidity of the cylinder (71) can be increased, thereby reducing damage to the cylinder (71).

BRIEF DESCRIPTION OF THE DRAWINGS

[FIG. 1] FIG. 1 is a schematic piping system diagram of a refrigerant circuit of a heat source apparatus of an embodiment.
[FIG. 2] FIG. 2 is a schematic perspective view of an outdoor unit.
[FIG. 3] FIG. 3 is a front view of the outdoor unit with an access port on the front side of a machine chamber open.
[FIG. 4] FIG. 4 is a plan view schematically illustrating the inside of the outdoor unit.
[FIG. 5] FIG. 5 is a right side view of the inside of the outdoor unit with a side plate removed.
[FIG. 6] FIG. 6 is a schematic view illustrating a positional relationship between a compressor and a cylinder, as well as a restriction portion, when the inside of the outdoor unit is viewed from above.
[FIG. 7] FIG. 7 is a schematic view illustrating a positional relationship between a compressor and a cylinder and the direction of displacement of the compressor when a heat source apparatus of a comparative example falls under the condition that a first straight line is aligned with the direction of gravity.
[FIG. 8] FIG. 8 is a schematic view illustrating the positional relationship between the compressor and the cylinder and the direction of displacement of the compressor when the heat source apparatus of the embodiment falls under the condition that a first straight line is aligned with the direction of gravity.
[FIG. 9] FIG. 9 is a view of an outdoor unit of a first variation, corresponding to FIG. 6.
[FIG. 10] FIG. 10 is a view of a heat source apparatus of the first variation, corresponding to FIG. 8.
[FIG. 11] FIG. 11 is a view of a heat source apparatus of a second variation, corresponding to FIG. 6.
[FIG. 12] FIG. 12 is a view of the heat source apparatus of the second variation, corresponding to FIG. 8.
[FIG. 13] FIG. 13 is a view of a heat source apparatus of a third variation, corresponding to FIG. 6.
[FIG. 14] FIG. 14 is a view of the heat source apparatus of the third variation, corresponding to FIG. 8.
[FIG. 15] FIG. 15 is a view of a heat source apparatus of a fourth variation, corresponding to FIG. 6.
[FIG. 16] FIG. 16 is a view of the heat source apparatus of the fourth variation, corresponding to FIG. 8.
[FIG. 17] FIG. 17 is a view of a heat source apparatus of a fifth variation, corresponding to FIG. 6.
[FIG. 18] FIG. 18 is a view of the heat source apparatus of the fifth variation, corresponding to FIG. 8.
[FIG. 19] FIG. 19 is a view of a heat source apparatus of a sixth variation, corresponding to FIG. 6.
[FIG. 20] FIG. 20 is a view of the heat source apparatus of the sixth variation, corresponding to FIG. 8.
[FIG. 21] FIG. 21 is a view of a heat source apparatus of a seventh variation, corresponding to FIG. 6.
[FIG. 22] FIG. 22 is a view of the heat source apparatus of the seventh variation corresponding to FIG. 8.
[FIG. 23] FIG. 23 is a view of a heat source apparatus of an eighth variation, corresponding to FIG. 6.
[FIG. 24] FIG. 24 is a view of the heat source apparatus of the eighth variation, corresponding to FIG. 8.
[FIG. 25] FIG. 25 is a view of a heat source apparatus of a ninth variation, corresponding to FIG. 6.
[FIG. 26] FIG. 26 is a view of the heat source apparatus of the ninth variation, corresponding to FIG. 8.
[FIG. 27] FIG. 27 is a view of a heat source apparatus of a tenth variation, corresponding to FIG. 6.
[FIG. 28] FIG. 28 is a view of the heat source apparatus of the tenth variation, corresponding to FIG. 8.
[FIG. 29] FIG. 29 is a view of a heat source apparatus of an eleventh variation, corresponding to FIG. 6.
[FIG. 30] FIG. 30 is a view of the heat source apparatus of the eleventh variation, corresponding to FIG. 8.
[FIG. 31] FIG. 31 is a view of a heat source apparatus of a twelfth variation, corresponding to FIG. 6.
[FIG. 32] FIG. 32 is a view of the heat source apparatus of the twelfth variation, corresponding to FIG. 8.
[FIG. 33] FIG. 33 is a view of a heat source apparatus of another embodiment, corresponding to FIG. 4.
[FIG. 34] FIG. 34 is a view of a heat source apparatus of another embodiment, corresponding to FIG. 6.

DESCRIPTION OF EMBODIMENTS

Exemplary embodiments will be described in detail below with reference to the drawings. The drawings are used for conceptual description of the present disclosure. In the drawings, dimensions, ratios, or numbers may be exaggerated or simplified for easy understanding of the present disclosure.

(1) Basic Configuration of Heat Source Apparatus

A heat source apparatus (1) of this embodiment forms a refrigeration cycle apparatus that performs a refrigeration cycle. The refrigeration cycle apparatus is applied to a hot water supply apparatus. The heat source apparatus (1) heats water and supplies the heated water to a target. The heat source apparatus (1) has an outdoor unit (20) installed outdoors. The outdoor unit (20) has a casing (21).
The casing (21) houses the entirety of a refrigerant circuit (11), which is a closed circuit. That is, the casing (21) houses a compressor (12), a water heat exchanger (15), a cylinder (71), and other components forming the refrigerant circuit (11). The refrigerant circuit (11) performs the refrigeration cycle. The refrigerant circuit (11) is filled with refrigerant. The refrigerant in the refrigerant circuit (11) is flammable refrigerant.
Specifically, the refrigerant in this embodiment is propane (R290). Propane is highly flammable natural refrigerant. The natural refrigerant is a refrigerant which has an ozone depletion potential of zero and a low global warming potential and thus has less impact on the environment. Propane ignites at 500°C or less. The flammable refrigerant may be methane (R50), ethane (R170), butane (R600), isobutane (R600a), or the like. The natural refrigerant may be corrosive refrigerant such as ammonia (R717).

(1-1) Refrigerant Circuit

As shown in FIG. 1, the refrigerant circuit (11) includes the compressor (12), an air heat exchanger (13), an expansion valve (14), the water heat exchanger (15), and the cylinder (71) as main components. The refrigerant circuit (11) further has a four-way switching valve (16) and an accumulator (17).
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) stores liquid in the refrigerant to be sucked into the compressor (12). The air heat exchanger (13) exchanges heat between the refrigerant and outdoor air. The expansion valve (14) decompresses the refrigerant. The water heat exchanger (15) exchanges heat between the refrigerant in the refrigerant circuit (11) and water in a water circuit (40).
The four-way switching valve (16) switches a direction in which the refrigerant circulates. The four-way switching valve (16) switches between a first state (the state indicated by a solid line in FIG. 1) and a second state (the state indicated by a broken line in FIG. 1). The four-way switching valve (16) in the first state allows a first port (16a) and a third port (16c) to communicate with each other, and allows a second port (16b) and a fourth port (16d) to communicate with each other. The four-way switching valve (16) in the second state allows the first port (16a) and the second port (16b) to communicate with each other, and allows the third port (16c) and the fourth port (16d) to communicate with each other.
The cylinder (71) is connected to the refrigerant circuit (11) via a connection pipe (72). The connection pipe (72) of this embodiment is connected to the suction pipe (19). The connection pipe (72) is provided with a control valve (73). The cylinder (71) is filled with the refrigerant before shipping of the heat source apparatus (1). An operator decompresses the refrigerant circuit (11) after the heat source apparatus (1) has been transported to the site. Then, when the operator opens the control valve (73), the refrigerant circuit (11) is filled with the refrigerant in the cylinder (71).
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 broken arrows. In the first refrigeration cycle, the four-way switching valve (16) is in the first state, where the water heat exchanger (15) functions as a radiator (a condenser) and the air heat exchanger (13) functions as an evaporator. In the second refrigerant cycle, the four-way switching valve (16) is in the second state, where the air heat exchanger (13) functions as a radiator (a condenser) and the water heat exchanger (15) functions as an evaporator.

(1-2) Water Circuit

The water circuit (40) is connected to the water heat exchanger (15). The water circuit (40) includes a first water pipe (41) and a second water pipe (42). Water flows through the first water pipe (41) and the second water pipe (42). The first water pipe (41) is connected upstream of the water heat exchanger (15) and forms a water supply pipe for supplying water to the water heat exchanger (15). The second water pipe (42) is connected downstream of the water heat exchanger (15) and forms a hot water discharge pipe for discharging hot water from the water heat exchanger (15).
A pump (43) is connected to the water circuit (40). The pump (43) delivers water in the water circuit (40). The water in the water circuit (40) is supplied to a target such as a boiler tank, an air-conditioning unit, and a floor heating unit. A gas-liquid separator (44) is connected to the water circuit (40). The gas-liquid separator (44) releases, to the atmosphere, the refrigerant that has leaked from the refrigerant circuit (11) to the water circuit (40) via the water heat exchanger (15).

(2) Outdoor Unit

The configuration of the outdoor unit (20) will be described in detail with reference to FIGS. 2 to 5. In the following description, the terms for the directions such as "top," "bottom," "right," "left," "front," and "rear" refer to the directions of arrows in FIG. 2. The left-right direction corresponds to a first direction. The front-rear direction corresponds to a second direction. The top-bottom direction corresponds to a third direction. The outdoor unit (20) includes the casing (21), the devices of the refrigerant circuit (11), and the devices of the water circuit (40).
In addition to the elements described above, the devices of the refrigerant circuit (11) include a refrigerant pipe, an electromagnetic valve, an internal heat exchanger, a filter, a thermal insulator for piping, and the like. The devices of the water circuit (11) include the above-described water heat exchanger (15), part of each of the first water pipe (41) and the second water pipe (42), and the like. The outdoor unit (20) further includes a partitioning member (45), which divides the interior of the casing (21), and a fan (30) that delivers outdoor air.

(2-1) Casing and Partitioning Member

The casing (21) is installed outdoors. The casing (21) is formed in a hollow box shape. More precisely, the casing (21) is formed in a box shape, with the left and rear surfaces partially open. The casing (21) is formed in a rectangular parallelepiped shape, with its left-right direction as a longitudinal direction and its front-rear direction as a lateral direction. The casing (21) is formed by a metal plate.
The casing (21) has a top panel (22), a bottom plate (23), a right panel (24), a left panel (25), a front panel (26), and a rear panel (27). The right panel (24), the left panel (25), the front panel (26), and the rear panel (27) form a peripheral wall (21a) of the casing (21). The top panel (22) and the bottom plate (23) face each other. The right panel (24) and the left panel (25) face each other. The front panel (26) and the rear panel (27) face each other.
The top panel (22) forms the upper surface of the casing (21). The bottom plate (23) forms the lower surface of the casing (21). The right panel (24) forms the right surface of the casing (21). The left panel (25) forms the left surface of the casing (21). The left panel (25) is located closer to the front of the casing (21), and is continuous with the front panel (26). The front panel (26) forms the front surface of the casing (21). The rear panel (27) forms the rear surface of the casing (21). The rear panel (27) is located closer to the right of the casing (21), and is continuous with the right panel (24).
The partitioning member (45) is provided in the casing (21). The partitioning member (45) extends from the bottom plate (23) to the top panel (22). The partitioning member (45) extends in the front-rear direction in top view. The partitioning member (45) may have a curved shape or a bent shape in top view, or may be formed in a curved configuration. The partitioning 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 in the casing (21). The machine chamber (S2) is formed on the right side in the casing (21).
The casing (21) has an inlet port (28) and an outlet port (29). The inlet port (28) is formed in part of the casing (21) that is from the rear surface to the left surface of the fan chamber (S1). The outlet port (29) is formed in part of the front panel (26) of the casing (21) on the front side of the fan chamber (S1). In the fan chamber (S1), a flow path through which the outdoor air flows is formed from the inlet port (28) to the outlet port (29).

(2-2) Configuration of Fan Chamber

The fan chamber (S1) is formed 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 air heat exchanger (13), the fan (30), and a bell mouth (31) are arranged in the fan chamber (S1).
The air heat exchanger (13) is formed in an L-shape in top view. The air heat exchanger (13) has a first heat exchange portion (13a) along the rear surface of the fan chamber (S1) and a second heat exchange portion (13b) along the left surface of the fan chamber (S1). The air heat exchanger (13) is a fin-and-tube heat exchanger. A heat transfer tube of the air heat exchanger (13) is formed as a flat perforated tube, but may also be a straight tube.
The air heat exchanger (13) of this embodiment extends to the machine chamber (S2). The first heat exchange portion (13a) is located behind the partitioning member (45). The first heat exchange portion (13a) extends in the left-right direction, passing through the space behind the rear end portion of the partitioning member (45). The right end portion of the first heat exchange portion (13a) is located in the machine chamber (S2).
The fan (30) is a propeller fan and has a motor (30a) and an impeller (30b). The motor (30a) is located behind the impeller (30b). The motor (30a) is supported by a support (32) installed on the bottom plate (23). The motor (30a) rotates the impeller (30b). The bell mouth (31) is formed in a tubular shape, and is located at the periphery of the impeller (30b). The bell mouth (31) is continuous with the outlet port (29).

(3) Configuration of Machine Chamber

The machine chamber (S2) is a substantially rectangular parallelepiped space. The length of the machine chamber (S2) in the left-right direction is substantially equal to the length of the machine chamber (S2) in the front-rear direction. The length of the machine chamber (S2) in the top-bottom direction is longer than the lengths of the machine chamber (S2) in the left-right direction and the front-rear direction. The length of the machine chamber (S2) in the left-right direction is shorter than the length of the fan chamber (S1) in the left-right direction.
The compressor (12), the water heat exchanger (15), the gas-liquid separator (44), and the accumulator (17) are disposed in the machine chamber (S2). The 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 filler unit (70).

(3-1) Compressor

The compressor (12) is disposed closer to the front and left sides of the machine chamber (S2). The compressor (12) has a compressor casing (12a). The compressor casing (12a) is formed in a vertically-long 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) forms a hermetic pressure-resistant container. The suction pipe (19) is connected to a top portion of the compressor (12). The discharge pipe (18) is connected to a barrel of the compressor (12). The compressor (12) is, for example, a scroll compressor.

(3-2) Water Heat Exchanger

The water heat exchanger (15) is disposed closer to the right side of the machine chamber (S2). The water heat exchanger (15) is closer to the right panel (24) than the compressor (12) is. The water heat exchanger (15) is closer to the rear panel (27) than the compressor (12) is. The water heat exchanger (15) is a plate heat exchanger. The first water pipe (41), the second water pipe (42), and a refrigerant pipe (not shown) are connected to the water heat exchanger (15).

(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 release path that releases a gas refrigerant separated in the gas-liquid separator (44) and a gas vent valve that opens and closes the release path (not shown).

(3-4) Accumulator

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

(3-5) Vibration Isolation Mechanism

The vibration isolation mechanism (50) reduces vibration 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 panel (51), a first elastic support portion (52), an intermediate panel (53), and a second elastic support portion (54). The second elastic support portion (54), the intermediate panel (53), the first elastic support portion (52), and the support panel (51) are installed on the bottom plate (23) in this order.
The intermediate panel (53) is installed on the bottom plate (23) via the second elastic support portion (54). The intermediate panel (53) of this embodiment supports the compressor (12), the water heat exchanger (15), the accumulator (17), and the filler unit (70) from below. The second elastic support portion (54) is fixed on the bottom plate (23), and supports the intermediate panel (53) from below. The intermediate panel (53) is a panel member having a substantially rectangular shape in top view.
The vibration isolation mechanism (50) of this embodiment includes four second elastic support portions (54). The second elastic support portions (54) are each disposed in the vicinity of four vertices of the intermediate panel (53). Each second elastic support portion (54) is interposed between the bottom plate (23) and the intermediate panel (53). The second elastic support portions (54) are made of an elastic material such as rubber or urethane. The vibration of the compressor (12) is attenuated by the second elastic support portions (54) before being transmitted to the bottom plate (23).
The support panel (51) is installed on the intermediate panel (53) via the first elastic support portion (52). The support panel (51) supports the compressor (12) from below. The first elastic support portion (52) is fixed on the intermediate panel (53), and supports the support panel (51) from below. The compressor (12) is fixed on the support panel (51). The support panel (51) is a panel member having a substantially triangular shape in top view, and is installed such that one of its vertices is directed forward and the side that is located opposite to the vertex face rearward. The support panel (51) has a circular hole at the center, in which a bottom portion of the compressor (12) is fitted.
The vibration isolation mechanism (50) of this embodiment includes three first elastic support portions (52). The first elastic support portions (52) are each disposed in the vicinity of three vertices of the support panel (51). The three first elastic support portions (52) form legs (12b) of the compressor (12). Each first elastic support portion (52) is interposed between the support panel (51) and the intermediate panel (53). The first elastic support portions (52) are made of an elastic material such as rubber or urethane. The vibration of the compressor (12) is attenuated by the first elastic support portions (52) before being transmitted to the intermediate panel (53).

(3-6) Sound Insulation Member

The sound insulation member (60) reduces propagation of noise generated during operation of the compressor (12) to the outside of the casing (21). The sound insulation member (60) is formed in a hollow box shape which is open downward. The sound insulation member (60) has an upper wall (61), a right wall (62), a left wall (63), a front wall (64), and a rear wall (65).
The upper wall (61) faces the top panel (22), and forms the upper surface of the sound insulation member (60). The right wall (62) faces the right panel (24), and forms the right surface of the sound insulation member (60). The left wall (63) faces the partitioning member (45), and forms the left surface of the sound insulation member (60). The front wall (64) faces the front panel (26), and forms the front surface of the sound insulation member (60). The rear wall (65) faces the rear panel (27), and forms the rear surface of the sound insulation member (60). The front wall (64) is attachable to and detachable from the body of the sound insulation member (60).
The sound insulation member (60) is supported by the bottom plate (23) of the casing (21). The sound insulation member (60) is a non-porous member. The sound insulation member (60) is formed by, for example, a metal member or a rubber sheet. The sound insulation member (60) forms an internal space (66) surrounding the compressor (12). The devices such as the compressor (12), the accumulator (17), the water heat exchanger (15), and the filler unit (70) are disposed in the internal space (66) of this embodiment.
The sound insulation member (60) and the casing (21) are spaced apart from each other with a predetermined gap. In other words, a clearance (67) is formed between the outer surface of the sound insulation member (60) and the inner surface of the casing (21). The clearance (67) reduces propagation of the noise generated during the operation of the compressor (12) to the outside of the casing (21).

(3-7) Filler Unit

The filler unit (70) is disposed closer to the right side of the machine chamber (S2) and closer to the front side of the machine chamber (S2). As illustrated in FIG. 6, the filler unit (70) has the cylinder (71), the connection pipe (72), the control valve (73), and a protection member (74).
The cylinder (71) stores flammable refrigerant for filling the refrigerant circuit (11). The cylinder (71) is filled with the refrigerant in advance at the time of shipment of the heat source apparatus (1). Thus, the cylinder (71) is filled with the refrigerant during storage and transportation of the heat source apparatus (1). After the heat source apparatus (1) has been installed on site, the refrigerant circuit (11) is filled with the refrigerant from the cylinder (71) before operation of the heat source apparatus (1). Thus, the cylinder (71) is empty when the heat source apparatus (1) is used.
The cylinder (71) is formed in a vertically-long hollow cylindrical shape. The height of the cylinder (71) is greater than the outer diameter of the cylinder (71). The cylinder (71) forms a hermetically closed pressure-resistant container. The cylinder (71) has lower rigidity than the compressor casing (12a).
As illustrated in FIGS. 1 and 3, the cylinder (71) has a discharge port (71a) at its lower portion. More precisely, the discharge port (71a) is formed in a bottom portion of the cylinder (71). The flammable refrigerant is discharged from the cylinder (71) through the discharge port (71a). The density of the flammable refrigerant is relatively high. Thus, the discharge port (71a) provided in the lower portion of the cylinder (71) can promote the discharge of the refrigerant. In addition, when filling the refrigerant circuit (11) with the refrigerant, the refrigerant remaining in the cylinder (71) can be reduced.
The connection pipe (72) is a pipe through which the refrigerant in the cylinder (71) is injected into the refrigerant circuit (11). The connection pipe (72) connects the cylinder (71) and the refrigerant circuit (11). One end of the connection pipe (72) is connected to the discharge port (71a) of the cylinder (71) and communicates with the interior of the cylinder (71). The other end of the connection pipe (72) is connected to the suction pipe (19). The connection pipe (72) is located below the cylinder (71).
The control valve (73) is provided in the connection pipe (72). The control valve (73) controls the opening degree of the connection pipe (72). The control valve (73) is an example of a shut-off valve that opens and closes the connection 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).
The protection member (74) is provided on the lower side of the cylinder (71). The protection member (74) has a function of protecting part of the connection pipe (72) and the control valve (73). The protection member (74) supports the cylinder (71) from below. The protection member (74) has a partition wall (74a). The partition wall (74a) surrounds part of the connection pipe (72) and the control valve (73). The partition wall (74a) has an opening (74b) through which the control valve (73) inside the partition wall (74a) is exposed to the outside of the partition wall (74a).

(3-8) Access Port

As illustrated in FIGS. 3 and 4, the casing (21) has an access port (A) on the front side of the casing (21). The front panel (26) is provided with a front surface panel (26a) attachable to and detachable from the body of the front panel (26). By detaching the front surface panel (26a), the access port (A) is exposed to the outside of the casing (21). By detaching the front wall (64) from the sound insulation member (60), the devices inside the casing (21) are exposed to the outside of the casing (21).
The compressor (12) and the cylinder (71) correspond to the access port (A) in the front-rear direction. The operator in front of the casing (21) can access the compressor (12) and the cylinder (71) through the access port (A). Thus, the operator can perform maintenance on the compressor (12). Moreover, the operator can operate the control valve (73) through the opening (74b) of the protection member (74).

(4) Features of Arrangement of Compressor and Cylinder

The compressor (12) and the cylinder (71) are installed indirectly on the bottom plate (23) via the intermediate panel (53). The arrangement relationship between the compressor (12) and the cylinder (71) will be described in detail with reference to FIG. 6.

(4-1) Arrangement Relationship between Compressor and Cylinder

As illustrated in FIG. 6, the compressor (12) and the cylinder (71) are horizontally offset from each other when viewed from the front of the access port (A). The compressor (12) is provided at a position farther from the front panel (26) than the cylinder (71) is. The distance between the compressor (12) and the front panel (26) is longer than the distance between the cylinder (71) and the front panel (26). As described above, when viewed from the front of the access port (A), the compressor (12) and the cylinder (71) are next to each other and positioned obliquely relative to the depth direction, i.e., the front-rear direction, of the casing (21).
In FIG. 6, the first center of gravity (C1) is the center of gravity of the compressor (12) in top view. The second center of gravity (C2) is the center of gravity of the cylinder (71) in top view. The term "top view" in this specification refers to a view in which the bottom plate (23) of the heat source apparatus (1) that is installed is viewed from above. Further, the "center of gravity" refers to the center of mass in top view or the center of mass in the horizontal direction. The "center of gravity" is not the center of mass in the vertical direction.
A first straight line (L1) is defined as a straight 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 top view. The first straight line (L1) intersects both of 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 panel (53), and divides the intermediate panel (53) into two areas.

(4-2) Problems when Heat Source Apparatus Falls

The heat source apparatus (1) houses the cylinder (71) inside the casing (21). The cylinder (71) stores propane which is the flammable natural refrigerant. During transportation before the heat source apparatus (1) is installed on site, there is a possibility that the heat source apparatus (1) may fall.
FIG. 7(A) is a heat source apparatus of a comparative example. The heat source apparatus of the comparative example does not include a restriction portion (80) configured to restrict the direction of displacement of the compressor (12) when the heat source apparatus falls. Specifically, in the heat source apparatus of the comparative example, the three legs (12b) of the compressor (12) are disposed symmetrically with respect to the first straight line (L1) in top view. In the comparative example, as illustrated in FIG. 7(A) and (B), when the heat source apparatus falls with the first straight line (L1) aligned with the direction of gravity, and the casing (21) collides with the ground (G) in that state, the compressor (12) moves toward the ground (G) in the direction of gravity. As a result, the compressor (12) collides with the cylinder (71), while being vertically aligned with the cylinder (71).
When the first straight line (L1) is aligned with the direction of gravity, a load acting on the cylinder (71) (more precisely, the impact load) increases. This is because the vector (white arrow in FIG. 7(B)) of the impact load at a time when the compressor (12) acts on the cylinder (71) 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) toward the second center of gravity (C2) of the cylinder (71). When the heat source apparatus falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the cylinder (71) is more likely to be damaged due to the collision with the compressor (12). If the cylinder (71) is damaged, the flammable refrigerant may leak.

(4-3) Restriction Portion

As illustrated in FIG. 6, the heat source apparatus (1) includes the restriction portion (80) for reducing the impact of the compressor (12) colliding with the cylinder (71) when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity. The restriction portion (80) has a function of restricting the direction of displacement of the compressor (12) when the heat source apparatus (1) falls. The restriction portion (80) restricts the displacement of the compressor (12) toward the cylinder (71) to a direction deviating from the first straight line (L1) under the condition in which the first straight line (L1) is aligned with the direction of gravity.
The restriction portion (80) of this embodiment is configured to guide the displacement of the compressor (12) toward the rear panel (27). The restriction portion (80) is achieved by devising the arrangement of the three legs (12b) of the compressor (12). Specifically, the restriction portion (80) includes a panel member (81) and the three legs (12b) of the compressor (12). The panel member (81) is the intermediate panel (53) installed on the bottom plate (23). In top view, the three legs (12b) are disposed asymmetrically with respect to the first straight line (L1). The first straight line (L1) does not overlap the center of any of the legs (12b).
In top view, the number of legs (12b) differs between an area on one side of the intermediate panel (53) and the area on the other side, divided by the first straight line (L1). One leg (12b) is disposed in the area (Af) closer to the front side than the first straight line (L1), and two legs (12b) are disposed in an area (Ar) closer to the rear side than the first straight line (L1). One of the legs (12b) disposed in the area (Ar) closer to the rear side than the first straight line (L1) is located closest to the second center of gravity (C2) of the cylinder (71) among the three legs (12b) in the direction along the first straight line (L1).

(4-4) Actions when Heat Source Apparatus Falls

Actions when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity in this embodiment will be described.
The impact of the compressor (12) colliding with the cylinder (71) when the heat source apparatus (1) falls becomes greater under the condition in which the casing (21) contacts the ground (G) with the first straight line (L1) aligned with the direction of gravity, as illustrated in FIG. 8(A) and (B). When the heat source apparatus (1) falls under this condition, the side (right side) of the bottom plate (23) is inclined with respect to the ground (G). Thus, it is possible to induce deformation of the bottom plate (23) and the right panel (24) before the cylinder (71) collides with the ground (G). The kinetic energy of the compressor (12) can thus be absorbed by the deformation of the casing (21). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.
In this embodiment, the multiple legs (12b) supporting the compressor (12) are disposed asymmetrically with respect to the first straight line (L1). Therefore, the impact acting on the cylinder (71) from the compressor (12) can be reduced. This is because the load (indicated by solid arrows in FIG. 8(B)) applied from the legs (12b) of the compressor (12) to the intermediate panel (53) due to the impact of the fall is biased to be greater in one of the areas divided by the first straight line (L1) (in the rear area (Ar) in this example), and the direction of displacement of the compressor (12) (white arrow in FIG. 8(B)) due to the impact of the fall of the heat source apparatus (1) is shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear panel (27).

(5) Features of Embodiment

In the heat source apparatus (1) of this embodiment, the restriction portion (80) restricts the displacement of the compressor (12) toward the cylinder (71) to the direction deviating from the first straight line (L1) when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity. Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the direction of displacement of the compressor (12) due to the impact of the fall deviates from the direction toward the cylinder (71) along the first straight line (L1). Therefore, the impact acting on the cylinder (71) from the compressor (12) can be reduced.
In the heat source apparatus (1) of this embodiment, the multiple legs (12b) supporting the compressor (12) are disposed asymmetrically with respect to the first straight line (L1). Thus, as illustrated in FIG. 8(B), when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the load applied from the legs (12b) of the compressor (12) to the intermediate panel (53) due to the impact of the fall becomes imbalanced between the areas on both sides of the first straight line (L1), causing the degree of deformation of the intermediate panel (53) to differ between the areas on both sides of the first straight line (L1). The load applied from the legs (12b) of the compressor (12) to the intermediate panel (53) and the degree of deformation of the intermediate panel (53) due to the load become greater in the rear area (Ar), where the leg (12b) closest to the second center of gravity (C2) of the cylinder (71) is disposed, than in the front area (Af). Thus, the direction of displacement of the compressor (12) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear panel (27).
In the heat source apparatus (1) of this embodiment, the multiple legs (12b) supporting the compressor (12) differs between the area on one side of the intermediate panel (53) and the area on the other side, divided by the first straight line (L1). According to this configuration, as illustrated in FIG. 8(B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the load applied from the compressor (12) to the intermediate panel (53) through the legs (12b) becomes greater in the area (Ar) on the rear side of the first straight line (L1), where a larger number of legs (12b) are disposed. This is advantageous in causing the degree of deformation of the intermediate panel (53) to differ appropriately between the areas on both sides of the first straight line (L1), and shifting the direction of displacement of the compressor (12) due to the impact of the fall from the direction toward the cylinder (71) along the first straight line (L1) toward the rear panel (27).
In the heat source apparatus (1) of this embodiment, the intermediate panel (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). Thus, the vibration during the operation of the compressor (12) is reduced by the second elastic support portion (54). Further, when the heat source apparatus (1) falls, a portion of the intermediate panel (53) between the compressor (12) and the cylinder (71) is deformed by the impact of the fall. The deformation of the intermediate panel (53) can absorb the kinetic energy of the compressor (12), and therefore, the impact acting on the cylinder (71) from the compressor (12) can be reduced even when the compressor (12) contacts the cylinder (71).
In the heat source apparatus (1) of this embodiment, the compressor (12) is surrounded by the sound insulation member (60). The sound insulation member (60) reduces noise during the operation of the compressor (12). When the heat source apparatus (1) falls, the sound insulation member (60) reduces the impact acting on the cylinder (71).
In the heat source apparatus (1) of this embodiment, the entirety of the refrigerant circuit (11), which is the closed circuit, is provided in the casing (21). Thus, for example, as compared with a separate type refrigeration cycle apparatus, the amount of refrigerant required to fill the refrigerant circuit (11) is reduced, allowing the cylinder (71) to be downsized. As a result, the rigidity of the cylinder (71) can be increased, thereby reducing damage to the cylinder (71).

(6) Variations

The above embodiment may be modified as follows. In the following description, differences from the above embodiment will be described.

(6-1) First Variation

A heat source apparatus (1) of a first variation differs from the heat source apparatus (1) of the above embodiment in the direction in which the restriction portion (80) guides the displacement of the compressor (12) when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity.
The restriction portion (80) of this variation is configured to guide the displacement of the compressor (12) toward the front panel (26). As illustrated in FIG. 9, the support panel (51) is a panel member having a substantially triangular shape in top view, and is installed such that one of its vertices is directed rearward and the side that is located opposite to the vertex faces forward.
The three legs (12b) of the compressor (12) form the restriction portion (80), and are disposed asymmetrically with respect to the first straight line (L1). On the intermediate panel (53), two legs (12b) are disposed in the area (Af) closer to the front side than the first straight line (L1), and one leg (12b) is disposed in the area (Ar) closer to the rear side than the first straight line (L1). One of the legs (12b) disposed in the area (Af) closer to the front side than the first straight line (L1) is located closest to the second center of gravity (C2) of the cylinder (71) among the three legs (12b) in the direction along the first straight line (L1).
As illustrated in FIG. 10(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the load (indicated by solid arrows in FIG. 10(B)) applied from the compressor (12) to the intermediate panel (53) through the legs (12b) due to the impact of the fall becomes greater in the area (Af) on the front side of the first straight line (L1), where a larger number of legs (12b) are disposed. Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 10(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the front panel (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-2) Second Variation

A heat source apparatus (1) of a second variation differs from the heat source apparatus (1) of the above embodiment in the shape of the support panel (51) and the number of legs (12b) of the compressor (12).
As illustrated in FIG. 11, the support panel (51) of this variation is a substantially rectangular panel member, and is provided such that one of portions of the opposing sides faces forward and the other portion faces rearward. The vibration isolation mechanism (50) of this variation includes four first elastic support portions (52). The first elastic support portions (52) are each disposed in the vicinity of four vertices of the support panel (51). Accordingly, four legs (12b) are provided for the compressor (12).
In top view, the four legs (12b) of the compressor (12) are disposed asymmetrically with respect to the first straight line (L1), but the number of legs (12b) is the same between the area on one side of the intermediate panel (53) and the area on the other side, divided by the first straight line (L1). Two legs (12b) are disposed in each of the area (Af) closer to the front side than the first straight line (L1) and the area (Ar) closer to the rear side than the first straight line (L1). One of the legs (12b) disposed closer to the front side than 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).
As illustrated in FIG. 12(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the load (indicated by solid arrows in FIG. 12(B)) applied from the legs (12b) of the compressor (12) to the intermediate panel (53) due to the impact of the fall and the degree of deformation of the intermediate panel (53) due to the load become greater in the area (Af) closer to the front side than the first straight line (L1) than in the area (Ar) closer to the rear side. Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 12(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the front panel (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-3) Third Variation

A heat source apparatus (1) of a third variation differs from the heat source apparatus (1) of the above embodiment in the configuration of the restriction portion (80). The restriction portion (80) of this variation is achieved by devising not only the arrangement of the three legs (12b) of the compressor (12) but also the configuration of the intermediate panel (53).
Specifically, as illustrated in FIG. 13, the restriction portion (80) is configured by providing a rib (81a) on the intermediate panel (53). The rib (81a) of this example is provided such that when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the above embodiment.
A second straight line (L2) illustrated in FIG. 13 is defined as a straight line orthogonal to the first straight line (L1) and passing through the first center of gravity (C1) of the compressor (12) in top view. The second straight line (L2) intersects both of the front-rear direction and the left-right direction, and extends rightward from the front side toward the rear side. The second straight line (L2) overlaps the left side of the intermediate panel (53), and divides the intermediate panel (53) into two areas.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The second area (A2) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1). The rib (81a) is provided in the first area (A1) and extends in a direction intersecting the second straight line (L2).
The rib (81a) is a portion of the intermediate panel (53) formed so as to protrude upward. The rib (81a) may be a portion of the intermediate panel (53) formed so as to protrude downward. The rib (81a) is provided so as to extend along the first straight line (L1) on the front side between the compressor (12) and the cylinder (71) in top view. The rib (81a) is also provided so as to extend along the entirety of the front edge of the intermediate panel (53) and part of the right edge of the intermediate panel (53) closer to the front end.
As illustrated in FIG. 14(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the impact of the fall causes the compressor (12) to move downward, applying the load from the legs (12b) of the compressor (12) to the intermediate panel (53), and the intermediate panel (53) buckles. In this variation, the rib (81a) is provided in the first area (A1) of the intermediate panel (53). The rib (81a) extends in the direction intersecting the second straight line (L2). The rib (81a) increases the buckling strength of the intermediate panel (53) in the direction along the first straight line (L1) more in the first area (A1) than in the second area (A2).
Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the second area (A2) of the intermediate panel (53) buckles before the first area (A1) when the load from the compressor (12) is applied to the intermediate panel (53). Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 14(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear panel (27). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-4) Fourth Variation

A heat source apparatus (1) of a fourth variation differs from the heat source apparatus (1) of the above embodiment in the direction in which the restriction portion (80) guides the displacement of the compressor (12) when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the restriction portion (80).
The restriction portion (80) of this variation is configured to guide the displacement of the compressor (12) toward the front panel (26). As illustrated in FIG. 15, the state of installation of the support panel (51) and the arrangement of the three legs (12b) of the compressor (12) in this example are the same as those in the first variation.
The restriction portion (80) is configured by providing a rib (81a) on the intermediate panel (53). The rib (81a) of this example is provided such that when the heat source apparatus (1) falls with the first straight line (L1) aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the first variation. The second straight line (L2) illustrated in FIG. 15 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1). The second area (A2) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The rib (81a) is provided in the first area (A1) and extends in a direction intersecting the second straight line (L2).
The rib (81a) is a portion of the intermediate panel (53) formed so as to protrude upward. The rib (81a) may be a portion of the intermediate panel (53) formed so as to protrude downward. The rib (81a) is provided so as to extend in the left-right direction between the water heat exchanger (15) and the cylinder (71) in top view. The rib (81a) is also provided so as to extend along the entirety of the right edge of the intermediate panel (53) and part of the rear edge of the intermediate panel (53) closer to the right end.
As illustrated in FIG. 16(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the second area (A2) of the intermediate panel (53) buckles before the first area (A1) when the load from the compressor (12) is applied to the intermediate panel (53), because the rib (81a) is provided in the first area (A1) of the intermediate panel (53) in this variation. Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 16(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the front panel (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-5) Fifth Variation

A heat source apparatus (1) of a fifth variation differs from the heat source apparatus (1) of the above embodiment in the configuration of the restriction portion (80). The restriction portion (80) of this variation is achieved by devising not only the arrangement of the three legs (12b) of the compressor (12) but also the configuration of the intermediate panel (53).
Specifically, as illustrated in FIG. 17, the restriction portion (80) is configured by providing, on the intermediate panel (53), a thick portion (81b) that is a partially thickened portion. The thick portion (81b) of this example is provided such that when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the above embodiment. The second straight line (L2) illustrated in FIG. 17 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The second area (A2) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1).
The thick portion (81b) of this example is a dot-hatched portion in FIG. 17, and forms the entirety of the first area (A1). The thickness of the thick portion (81b) is 1.5 times or more the thickness of the other portion of the intermediate panel (53). The thick portion (81b) of this example does not form the second area (A2). That is, the second area (A2) does not include the thick portion (81b). The thick portion (81b) may form only part of the first area (A1), or may also form part of a region other than the first area (A1).
As illustrated in FIG. 18(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the impact of the fall causes the compressor (12) to move downward, applying the load from the legs (12b) of the compressor (12) to the intermediate panel (53), and the intermediate panel (53) buckles. In this variation, the thick portion (81b) is provided in the first area (A1) of the intermediate panel (53), making the thickness of the intermediate panel (53) greater in the first area (A1) than in the second area (A2). The buckling strength of the intermediate panel (53) increases as the thickness of the intermediate panel (53) increases.
Thus, the buckling strength of the intermediate panel (53) in the direction along the first straight line (L1) is greater in the first area (A1) than in the second area (A2). Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the second area (A2) of the intermediate panel (53) buckles before the first area (A1) when the load from the compressor (12) is applied to the intermediate panel (53). Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 18(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear panel (27). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-6) Sixth Variation

A heat source apparatus (1) of a sixth variation differs from the heat source apparatus (1) of the above embodiment in the direction in which the restriction portion (80) guides the displacement of the compressor (12) when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the restriction portion (80).
The restriction portion (80) of this variation is configured to guide the displacement of the compressor (12) toward the front panel (26). As illustrated in FIG. 19, the state of installation of the support panel (51) and the arrangement of the three legs (12b) of the compressor (12) in this example are the same as those in the first variation.
The restriction portion (80) is formed by providing, on the intermediate panel (53), a thick portion (81b) that is thicker than the other portion. The thick portion (81b) of this example is provided such that when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the first variation. The second straight line (L2) illustrated in FIG. 19 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1). The second area (A2) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1).
The thick portion (81b) of this example is a dot-hatched portion in FIG. 19, and forms the entirety of the first area (A1). The thickness of the thick portion (81b) is the same as the thickness of the thick portion (81b) of the fifth variation. The thick portion (81b) does not form the second area (A2). That is, the second area (A2) does not include the thick portion (81b). The thick portion (81b) may form only part of the first area (A1), or may also form part of a region other than the first area (A1).
As illustrated in FIG. 20(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the second area (A2) of the intermediate panel (53) buckles before the first area (A1) when the load from the compressor (12) is applied to the intermediate panel (53), because the thickness of the intermediate panel (53) is greater in the first area (A1) than in the second area (A2) in this variation. Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 20(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the front panel (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-7) Seventh Variation

A heat source apparatus (1) of a seventh variation differs from the heat source apparatus (1) of the above embodiment in the configuration of the restriction portion (80). The restriction portion (80) of this variation is achieved by devising not only the arrangement of the three legs (12b) of the compressor (12) but also the configuration of the intermediate panel (53).
Specifically, as illustrated in FIG. 21, the restriction portion (80) is configured by providing, on the intermediate panel (53), a high-strength portion (81c) that has greater strength than the other portion. The high-strength portion (81c) of this example is provided such that when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the above embodiment. The second straight line (L2) illustrated in FIG. 21 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The second area (A2) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1).
The high-strength portion (81c) of this example is a hatched portion in FIG. 21, and forms the entirety of the first area (A1). The high-strength portion (81c) of this example does not form the second area (A2). That is, the second area (A2) does not include the high-strength portion (81c). The high-strength portion (81c) and the other portion of the intermediate panel (53) are made of different materials. For example, the high-strength portion (81c) of the intermediate panel (53) is made of carbon steel. The other portion is made of spheroidal graphite cast iron. The Young's modulus of the material of the intermediate panel (53) is greater in the first area (A1) than in the second area (A2). The high-strength portion (81c) may form only part of the first area (A1), or may also form part of a region other than the first area (A1).
As illustrated in FIG. 22(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the impact of the fall causes the compressor (12) to move downward, applying the load from the legs (12b) of the compressor (12) to the intermediate panel (53), and the intermediate panel (53) buckles. In this variation, the high-strength portion (81c) is provided in the first area (A1) of the intermediate panel (53), and the Young's modulus of the material of the intermediate panel (53) is greater in the first area (A1) than in the second area (A2). The buckling strength of the intermediate panel (53) increases as the Young's modulus of the material of the intermediate panel (53) increases.
Thus, the buckling strength of the intermediate panel (53) in the direction along the first straight line (L1) is greater in the first area (A1) than in the second area (A2). Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the second area (A2) of the intermediate panel (53) buckles before the first area (A1) when the load from the compressor (12) is applied to the intermediate panel (53). Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 22(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear panel (27). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-8) Eighth Variation

A heat source apparatus (1) of an eighth variation differs from the heat source apparatus (1) of the above embodiment in the direction in which the restriction portion (80) guides the displacement of the compressor (12) at the moment of the fall under the condition in which the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the restriction portion (80).
The restriction portion (80) of this variation is configured to guide the displacement of the compressor (12) toward the front panel (26). As illustrated in FIG. 23, the state of installation of the support panel (51) and the arrangement of the three legs (12b) of the compressor (12) in this example are the same as those in the first variation.
The restriction portion (80) is configured by providing, on the intermediate panel (53), a high-strength portion (81c) that is a partially strengthened portion. The high-strength portion (81c) of this example is provided such that when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the first variation. The second straight line (L2) illustrated in FIG. 23 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The second area (A2) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1).
The high-strength portion (81c) of this example is a hatched portion in FIG. 23, and forms the entirety of the first area (A1). The materials of the high-strength portion (81c) and the other portion of the intermediate panel (53) are the same as those of the seventh variation. The high-strength portion (81c) does not form the second area (A2). That is, the second area (A2) does not include the high-strength portion (81c). The high-strength portion (81c) may form only part of the first area (A1), or may also form part of a region other than the first area (A1).
As illustrated in FIG. 24(A) and (B), when the heat source apparatus (1) falls with the first straight line (L1) aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the second area (A2) of the intermediate panel (53) buckles before the first area (A1) when the load from the compressor (12) is applied to the intermediate panel (53), because the Young's modulus of the intermediate panel (53) is greater in the first area (A1) than in the second area (A2) in this variation. Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 24(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the front panel (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-9) Ninth Variation

A heat source apparatus (1) of a ninth variation differs from the heat source apparatus (1) of the above embodiment in the configuration of the restriction portion (80). The restriction portion (80) of this variation is achieved by devising not only the arrangement of the three legs (12b) of the compressor (12) but also the configuration of the intermediate panel (53).
Specifically, as illustrated in FIG. 25, the restriction portion (80) is configured by forming an opening (53d) in the intermediate panel (53). The opening (53d) of this example is provided such that when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the above embodiment. The second straight line (L2) illustrated in FIG. 25 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The second area (A2) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1). The opening (53d) is provided in the second area (A2) and penetrates the intermediate panel (53).
The opening (53d) is formed in a slit shape extending in a direction intersecting the first straight line (L1). 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) in top view. The opening (53d) is adjacent to the leg (12b) located in the second area (A2) of the intermediate panel (53) among the three legs (12b) of the compressor (12) along the direction of the first straight line (L1). The number of openings (53d) may be one as illustrated in FIG. 25, or a plurality of openings (53d) may be formed.
As illustrated in FIG. 26(A) and (B), when the heat source apparatus (1) falls with the first straight line (L1) aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the impact of the fall causes the compressor (12) to move downward, applying the load from the legs (12b) of the compressor (12) to the intermediate panel (53), and the intermediate panel (53) buckles. In this variation, the opening (53d) is formed in the second area (A2) of the intermediate panel (53). The opening (53d) penetrates the intermediate panel (53). The buckling strength of the intermediate panel (53) is lower in the area where the opening (53d) is formed.
Thus, the buckling strength of the intermediate panel (53) in the direction along the first straight line (L1) is lower in the second area (A2) than in the first area (A1). Thus, when the first straight line (L1) is aligned with the direction of gravity at the moment the heat source apparatus (1) falls, the second area (A2) of the intermediate panel (53) buckles before the first area (A1) when the load from the compressor (12) is applied to the intermediate panel (53). Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 26(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the rear panel (27). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-10) Tenth Variation

A heat source apparatus (1) of a tenth variation differs from the heat source apparatus (1) of the above embodiment in the direction in which the restriction portion (80) guides the displacement of the compressor (12) when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the restriction portion (70).
The restriction portion (80) of this variation is configured to guide the displacement of the compressor (12) toward the front panel (26). As illustrated in FIG. 27, the state of installation of the support panel (51) and the arrangement of the three legs (12b) of the compressor (12) in this example are the same as those in the first variation.
The restriction portion (80) is configured by forming an opening (53d) in the intermediate panel (53). The opening (53d) of this example is provided such that when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the first variation. The second straight line (L2) illustrated in FIG. 27 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1). The second area (A2) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The opening (53d) is provided in the first area (A1) and penetrates the intermediate panel (53).
The opening (53d) is formed in a slit shape extending in a direction intersecting the first straight line (L1). The opening (53d) extends in the front-rear direction from the front edge of the intermediate panel (53) to a position between the compressor (12) and the cylinder (71) in top view, and is open to the front edge of the intermediate panel (53). The opening (53d) is adjacent to the leg (12b) located in the second area (A2) of the intermediate panel (53) among the three legs (12b) of the compressor (12) along the direction of the first straight line (L1). The number of openings (53d) may be one as illustrated in FIG. 27, or a plurality of openings (53d) may be formed.
As illustrated in FIG. 28(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the second area (A2) of the intermediate panel (53) buckles before the first area (A1) when the load from the compressor (12) is applied to the intermediate panel (53), because the opening (53d) is provided in the second area (A2) of the intermediate panel (53) in this variation. Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 28(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the front panel (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-11) Eleventh Variation

A heat source apparatus (1) of an eleventh variation differs from the heat source apparatus (1) of the above embodiment in the configuration of the restriction portion (80). As illustrated in FIG. 29, the restriction portion (80) of this variation is achieved not only by devising the arrangement of the three legs (12b) of the compressor (12) but also by providing a support member (82). The second straight line (L2) illustrated in FIG. 29 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The second area (A2) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1). The support member (82) of this example supports the compressor (12) on the intermediate panel (53).
The support member (82) is an elongated panel member, and is made of steel such as angle steel. The support member (82) is located on the side of the compressor (12) closer to the cylinder (71), and is provided in the first area (A1) of the intermediate panel (53). The support member (82) extends in a direction intersecting the first straight line (L1) and the second straight line (L2) in top view, and extends forward from the compressor (12) toward the cylinder (71) (that is, toward the front right). 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 panel (53).
As illustrated in FIG. 30(A) and (B), when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, the impact of the fall causes the compressor (12) to move downward. In this variation, the support member (82) is provided on the side of the compressor (12) closer to the cylinder (71). The support member (82) extends in the direction intersecting the first straight line (L1) in top view, and supports the compressor (12) on the intermediate panel (53) installed on the bottom plate (23).
When the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, a force in a direction different from the direction toward the cylinder (71) is applied from the support member (82) to the compressor (12), because the support member (82) is interposed between the compressor (12) and the intermediate panel (53). Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 30(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-12) Twelfth Variation

A heat source apparatus (1) of a fourth variation differs from the heat source apparatus (1) of the above embodiment in the direction in which the restriction portion (80) guides the displacement of the compressor (12) at the moment of the fall under the condition in which the first straight line (L1) is aligned with the direction of gravity, and in the configuration of the restriction portion (80).
The restriction portion (80) of this variation is configured to guide the displacement of the compressor (12) toward the front panel (26). As illustrated in FIG. 31, the state of installation of the support panel (51) and the arrangement of the three legs (12b) of the compressor (12) in this example are the same as those in the first variation.
The restriction portion (80) includes the support member (82). The support member (82) of this example is provided such that when the heat source apparatus (1) falls under the condition in which the first straight line (L1) is aligned with the direction of gravity, the compressor (12) is displaced to the same side as the side to which the compressor (12) is displaced by the arrangement of the three legs (12b) in the first variation. The second straight line (L2) illustrated in FIG. 31 is defined in the same manner as that in the third variation.
The intermediate panel (53) has a first area (A1) and a second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) of this example is part of the area (Ar) of the intermediate panel (53) closer to the rear side than the first straight line (L1). The second area (A2) of this example is part of the area (Af) of the intermediate panel (53) closer to the front side than the first straight line (L1). The support member (82) of this example supports the compressor (12) on the peripheral wall (21a) of the casing (21).
The support member (82) is an elongated panel member, and is made of steel such as angle steel. The support member (82) is located on the side of the compressor (12) closer to the cylinder (71), and is provided in the first area (A1) of the intermediate panel (53). The support member (82) extends in the direction intersecting the first straight line (L1) and the second straight line (L2) in top view, extends rightward (more precisely, toward the rear right) from the compressor (12) side through the rear side of the cylinder (71), 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 panel (24).
As illustrated in FIG. 32(A) and (B), when the heat source apparatus (1) falls with the first straight line (L1) aligned with the direction of gravity, and the casing (21) contacts the ground (G) in this state, a force in a direction different from the direction toward the cylinder (71) is applied from the support member (82) to the compressor (12).This is because the support member (82) is provided on the side of the compressor (12) closer to the cylinder (71), so that the support member (82) is interposed between the peripheral wall (21a) of the casing (21) and the compressor (12) in this variation. Thus, the direction of displacement of the compressor (12) (white arrow in FIG. 32(B)) due to the impact of the fall can be shifted from the direction toward the cylinder (71) along the first straight line (L1) toward the front panel (26). As a result, the impact acting on the cylinder (71) from the compressor (12) can be reduced.

(6-13) Thirteenth Variation

As illustrated in FIG. 33, in a heat source apparatus (1) of a thirteenth variation, 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 and is made of, for example, urethane. The sound-absorbing material (90) is disposed so as to overlap the outer surface or inner surface of the casing (21).
Specifically, the sound-absorbing material (90) is provided inside each of the upper wall (61), the right wall (62), the left wall (63), the front wall (64), and the rear wall (65) of the sound insulation member (60). The use of the sound-absorbing material (90) improves a noise reduction effect in the machine chamber (S2). When the heat source apparatus (1) falls, the sound-absorbing material (90) reduces the impact when the cylinder (71) collides with the ground (G). The sound-absorbing material (90) may be provided not inside but outside the sound insulation member (60), or may be provided both inside and outside the sound insulation member (60).

(7) Other Embodiments

As illustrated in FIG. 34, the vibration isolation mechanism (50) may be configured without the intermediate panel (53) and the second elastic support portion (54). For example, the vibration isolation mechanism (50) may include the support panel (51) and three first elastic support portions (52). The support panel (51) is fixed on the bottom plate (23) via the three first elastic support portions (52). Each first elastic support portion (52) is fixed on the bottom plate (23) and supports the support panel (51) from below. The compressor (12) is supported by the support panel (51) from below. In this case, the panel member (81) forming the restriction portion (80) is formed of the bottom plate (23).
In the heat source apparatus (1) of the above embodiment, when the panel member (81) is formed of the bottom plate (23), the three legs (12b) are disposed asymmetrically with respect to the first straight line (L1) in top view. The same applies to the heat source apparatuses (1) of the first and second variations as well. In the heat source apparatus (1) of the first variation, also in the case in which the panel member (81) is formed of the bottom plate (23), the number of legs (12b) differs between the area on one side of the bottom plate (23) and the area on the other side, divided by the first straight line (L1).
In the heat source apparatus (1) of the third variation, when the panel member (81) is formed of the bottom plate (23), the bottom plate (23) has the first area (A1) and the second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) is in the area (Af) closer to the front side than the first straight line (L1). The rib (81a) extending in the direction intersecting the second straight line (L2) is provided in the first area (A1). The same applies to the heat source apparatus (1) of the fourth variation as well.
In the heat source apparatus (1) of the fifth variation, when the panel member (81) is formed of the bottom plate (23), the bottom plate (23) has the first area (A1) and the second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) is in the area (Af) closer to the front side than the first straight line (L1). The thick portion (81b) thicker than the other portion is provided in the first area (A1), making the thickness of the bottom plate (23) greater in the first area (A1) than in the second area (A2). The same applies to the sixth variation as well.
In the heat source apparatus (1) of the seventh variation, when the panel member (81) is formed of the bottom plate (23), the bottom plate (23) has the first area (A1) and the second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) is in the area (Af) closer to the front side than the first straight line (L1). The high-strength portion (81c) having greater strength than the other portion is provided in the first area (A1). The high-strength portion (81c) and other portion of the bottom plate (23) are made of different materials, and the Young's modulus of the material of the bottom plate (23) is greater in the first area (A1) than in the second area (A2). The same applies to the heat source apparatus (1) of the eighth variation as well.
In the heat source apparatus (1) of the ninth variation, when the panel member (81) is formed of the bottom plate (23), the bottom plate (23) has the first area (A1) and the second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) is in the area (Af) closer to the front side than the first straight line (L1). An opening (81d) penetrating the bottom plate (23) is formed in the first area (A1). The same applies to the heat source apparatus (1) of the tenth variation as well.
In the heat source apparatus (1) of the eleventh variation, when the panel member (81) is formed of the bottom plate (23), the bottom plate (23) has the first area (A1) and the second area (A2) divided by the first straight line (L1) on the side closer to the cylinder (71) than the second straight line (L2) in top view. The first area (A1) is in the area (Af) closer to the front side than the first straight line (L1). The support member (82) is provided in the first area (A1) and supports the compressor (12) on the peripheral wall (21a) or the bottom plate (23) of the casing (21). The same applies to the heat source apparatus (1) of the twelfth variation as well.
In the heat source apparatuses (1) of the third to twelfth variations, the plurality of legs (12b) may be disposed symmetrically with respect to the first straight line (L1) in top view. The restriction portion (80) may have any configuration other than the configurations of the above embodiment and the first to twelfth variations, as long as the restriction portion (80) restricts the displacement of the compressor (12) toward the cylinder (71) to a direction deviating from the first straight line (L1) under the condition in which the first straight line (L1) is aligned with the direction of gravity.
The intermediate panel (53) may support only the compressor (12) and the filler unit (70) from below. In this case, the water heat exchanger (15) and the accumulator (17) may be directly supported by the bottom plate (23) of the casing (21).
The heat source apparatus (1) may form part of the refrigeration cycle apparatus. Specifically, the refrigeration cycle apparatus may be of a separate type in which a heat source unit, which is the heat source apparatus (1), and a utilization unit are connected to each other via a connection pipe. The refrigeration cycle apparatus may be an air conditioner, a transportable refrigeration apparatus, a stationary refrigeration apparatus, or the like.
The sound insulation member (60) may cover only the compressor (12).
While the embodiments and variations thereof have been described above, it will be understood that various changes in form and details may be made without departing from the spirit and scope of the claims. The foregoing embodiment and variations thereof may be combined or replaced with each other without deteriorating the intended functions of the present disclosure.
The ordinal numbers such as "first," "second," "third," ... in the description and claims are used to distinguish the terms to which these expressions are given, and do not limit the number and order of the terms.

INDUSTRIAL APPLICABILITY

As can be seen from the foregoing description, the present disclosure is useful for a heat source apparatus.

DESCRIPTION OF REFERENCE CHARACTERS

A1: First Area
A2: Second Area
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 Apparatus
11: Refrigerant Circuit
12: Compressor
12a: Leg
20: Outdoor Unit
21: Casing
23: Bottom Plate
53: Intermediate Panel
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: Panel Member
82: Support Member
90: Sound Absorbing Material

Claims

A heat source apparatus comprising:
a compressor (12) included in a refrigerant circuit (11) configured to perform a refrigeration cycle;

a cylinder (71) storing a flammable refrigerant for filling the refrigerant circuit (11), the cylinder (71) having, in a lower portion, a discharge port (71a) through which the flammable refrigerant is discharged;

a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are installed; and

a restriction portion (80) configured to restrict a direction of displacement of the compressor (12) when the heat source apparatus falls,

in a top view, viewing the bottom plate (23) from above with the heat source apparatus installed, a first straight line (L1) being 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),

the restriction portion (80) being configured to restrict the displacement of the compressor (12) toward the cylinder (71) to a direction deviating from the first straight line (L1) under a condition in which the first straight line (L1) is aligned with a direction of gravity.
The heat source apparatus of claim 1, wherein
the restriction portion (80) is configured to include
a panel member (81) formed of an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and

multiple legs (12b) fixed to the panel member (81) and supporting the compressor (12) from below, and

in the top view, the multiple legs (12b) are disposed asymmetrically with respect to the first straight line (L1).
The heat source apparatus of claim 2, wherein
in the top view, the number of legs (12b) differs between an area on one side of the panel member (81) and an area on the other side, divided by the first straight line (L1).
The heat source apparatus of any one of claims 1 to 3, wherein
the restriction portion (80) is configured to include a panel member (81) supporting the compressor (12) from below,

a second straight line (L2) is defined as a straight line orthogonal to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12),

the panel member (81)
is an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and

has a first area (A1) and a second area (A2) divided by the first straight line (L1) on a side closer to the cylinder (71) than the second straight line (L1) in the top view, and

the first area (A1) is provided with a rib (53a) extending in a direction intersecting the second straight line (L2).
The heat source apparatus of any one of claims 1 to 4, wherein
the restriction portion (80) is configured to include a panel member (81) supporting the compressor (12) from below,

a second straight line (L2) is defined as a straight line orthogonal to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12),

the panel member (81)
is an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and

has a first area (A1) and a second area (A2) divided by the first straight line (L1) on a side closer to the cylinder (71) than the second straight line (L2) in the top view, and

a thickness of the panel member (81) is greater in the first area (A1) than in the second area (A2).
The heat source apparatus of any one of claims 1 to 5, wherein
the restriction portion (80) is configured to include a panel member (81) supporting the compressor (12) from below,

a second straight line (L2) is defined as a straight line orthogonal to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12),

the panel member (81)
is an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and

has a first area (A1) and a second area (A2) divided by the first straight line (L2) on a side closer to the cylinder (71) than the second straight line (L2) in the top view, and

a Young's modulus of a material of the panel member (81) is greater in the first area (A1) than in the second area (A2).
The heat source apparatus of any one of claims 1 to 6, wherein
the restriction portion (80) is configured to include a panel member (81) supporting the compressor (12) from below,

a second straight line (L2) is defined as a straight line orthogonal to the first straight line (L1) and passing through the center of gravity (C1) of the compressor (12),

the panel member (81)
is an intermediate panel (53) installed on the bottom plate (23), or the bottom plate (23), and

has a first area (A1) and a second area (A2) divided by the first straight line (L1) on a side closer to the cylinder (71) than the second straight line (L2) in the top view, and

the second area (A2) has an opening (53d) penetrating the panel member (81).
The heat source apparatus of any one of claims 1 to 7, wherein
the restriction portion (80) is configured to include a support member (82) supporting the compressor (12) on an intermediate panel (53) installed on the bottom plate (23), the bottom plate (23), or a peripheral wall (21a) of the casing (21), and

the support member (82) is located on a side of the compressor (12) closer to the cylinder (71), and extends in a direction intersecting the first straight line (L1) in the top view.
The heat source apparatus of any one of claims 1 to 8, further comprising:
an intermediate panel (53) supporting the compressor (12) and the cylinder (71) from below; and

an elastic support portion (54) fixed on the bottom plate (23) and supporting the intermediate panel (53) from below.
The heat source apparatus of any one of claims 1 to 9, further comprising:
a sound insulation member (60) surrounding the compressor (12).
The heat source apparatus of any one of claims 1 to 10, further comprising:
a sound-absorbing material (90) disposed so as to overlap an outer surface or an inner surface of the casing (21).
The heat source apparatus of any one of claims 1 to 11, wherein
the casing (21) houses an entirety of the refrigerant circuit (11).