Heat source unit and refrigeration cycle device

Abstract

In the present invention, openings (70a) are formed in a casing (70). A compressor (30) and a water heat exchanger (15) are disposed in an internal space (S1) of the casing (70). Fluid pipes (17) are inserted into the openings (70a) of the casing (70) and are connected to the water heat exchanger (15). A support part (18) is disposed in the internal space (S1) of the casing (70) and supports the fluid pipes (17).

Description

Heat source unit and refrigeration cycle device

[0001] The present disclosure relates to a heat source unit and a refrigeration cycle device.

[0002] Patent Document 1 discloses a heat source unit (outdoor unit) in which a compressor soundproof box containing a compressor is arranged in a machine room. In the heat source unit of Patent Document 1, sound-absorbing material is attached to the inner surfaces of the soundproof box sheet metal, which forms the side and top surfaces of the compressor soundproof box.

[0003] Patent No. 6501908

[0004] It is conceivable to place a water heat exchanger in a heat source unit such as that described in Patent Document 1. However, simply connecting a fluid pipe to a water heat exchanger placed in a heat source unit may cause force (stress) applied to the fluid pipe to be transmitted to the water heat exchanger, which may cause damage to the water heat exchanger.

[0005] An object of the present disclosure is to suppress the transmission of force applied to a fluid pipe to a water heat exchanger.

[0006] A first aspect of the present disclosure relates to a heat source unit, the heat source unit including: a casing (70) having an opening (70a) formed therein; a compressor (30) and a water heat exchanger (15) disposed in an internal space (S1) of the casing (70); a fluid pipe (17) inserted through the opening (70a) of the casing (70) and connected to the water heat exchanger (15); and a support part (18) disposed in the internal space (S1) of the casing (70) and supporting the fluid pipe (17).

[0007] In the first aspect, the support (18) supporting the fluid pipe (17) can inhibit the transmission of force (stress) applied to the fluid pipe (17), thereby suppressing the transmission of the force applied to the fluid pipe (17) to the water heat exchanger (15).

[0008] A second aspect of the present disclosure is a heat source unit in which, in the heat source unit of the first aspect, it is provided with a mounting member (81) on which the water heat exchanger (15) is placed, and a vibration-damping member (82) that supports the mounting member (81), and the support portion (18) is fixed to the mounting member (81).

[0009] In the second aspect, the mounting member (81) on which the water heat exchanger (15) and the support portion (18) are arranged is supported by the vibration-isolating member (82), thereby suppressing vibration of the water heat exchanger (15) and the support portion (18). Furthermore, since the water heat exchanger (15) and the support portion (18) can be arranged in the same vibration system, the force applied to the water heat exchanger (15) due to the difference in vibration between the water heat exchanger (15) and the support portion (18) can be reduced.

[0010] A third aspect of the present disclosure is a heat source unit in which, in the heat source unit of the first or second aspect, the support portion (18) supports the fluid piping (17) so that the fluid piping (17) is inserted into the opening (70a) of the casing (70) with a predetermined gap between the opening (70a) and the casing (70).

[0011] In the third aspect, contact between the fluid pipe (17) and the opening (70a) of the casing (70) can be suppressed, and therefore, the generation of contact noise can be suppressed.

[0012] A fourth aspect of the present disclosure is a heat source unit according to the third aspect, further comprising a sound-insulating member (60) that is disposed in the internal space (S1) of the casing (70) and surrounds the compressor (30) and the water heat exchanger (15), wherein the sound-insulating member (60) has an opening (60a) through which the fluid piping is inserted, and the support portion (18) supports the fluid piping (17) such that the fluid piping (17) is inserted into the opening (70a) of the casing (70) and the opening (60a) of the sound-insulating member (60) with a predetermined gap between them.

[0013] In the fourth aspect, the double sound insulation structure of the sound insulation member (60) and the casing (70) can prevent radiant sound and vibration sound from the compressor (30) and the water heat exchanger (15) from leaking to the outside. In addition, contact between the "fluid piping (17)" and the "opening (70a) of the casing (70) and the opening (60a) of the sound insulation member (60)" can be prevented, thereby preventing the generation of contact noise.

[0014] A fifth aspect of the present disclosure is a heat source unit according to the fourth aspect, further comprising an insulating member (63) having elasticity and wound around the fluid piping (17), and the support part (18) supports the fluid piping (17) such that the fluid piping (17) around which the insulating member (63) is wound is inserted into an opening (70a) of the casing (70) and an opening (60a) of the sound insulation member (60) with a predetermined gap between them.

[0015] In the fifth aspect, by wrapping an elastic heat insulating member (63) around the fluid piping (17), even if the fluid piping (17) around which the heat insulating member (63) is wrapped comes into contact with the "opening (70a) of the casing (70) and the opening (60a) of the sound insulating member (60)", the elasticity of the heat insulating member (63) can suppress contact noise.

[0016] A sixth aspect of the present disclosure is a heat source unit according to the fourth or fifth aspect, which is provided with a first sound-absorbing member (61) arranged between the outer surface of the sound-insulating member (60) and the inner surface of the casing (70).

[0017] In the sixth aspect, the first sound absorbing member (61) can suppress a decrease in sound insulation performance due to the low frequency resonance transmission phenomenon, thereby improving the soundproofing effect.

[0018] A seventh aspect of the present disclosure is the heat source unit of the sixth aspect, further comprising a second sound-absorbing member (62) provided on the inner surface of the sound-insulating member (60). The second sound-absorbing member (62) absorbs radiated sound and vibration sound from the compressor (30) and the water heat exchanger (15), thereby improving the soundproofing effect.

[0019] An eighth aspect of the present disclosure is a refrigeration cycle device including the heat source unit according to any one of the first to seventh aspects.

[0020] FIG. 1 is a piping system diagram illustrating the configuration of a refrigeration cycle apparatus of an embodiment. FIG. 2 is a front cross-sectional view illustrating the configuration of an outdoor unit. FIG. 3 is a plan cross-sectional view illustrating the configuration of an outdoor unit. FIG. 4 is a plan cross-sectional view illustrating the configuration of a main part of the outdoor unit. FIG. 5 is a side cross-sectional view illustrating the configuration of a main part of the outdoor unit. FIG. 6 is a rear cross-sectional view illustrating the configuration of a main part of the outdoor unit. FIG. 7 is a plan cross-sectional view illustrating the configuration of a main part of an outdoor unit of a modified example of the embodiment.

[0021] Hereinafter, embodiments will be described in detail with reference to the drawings. In the drawings, identical or corresponding parts are designated by the same reference numerals, and their description will not be repeated. Furthermore, the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical concept of the present disclosure. Since the drawings are intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding.

[0022] 1, the refrigeration cycle apparatus (1) is a refrigeration cycle apparatus for supplying hot water, and has an outdoor unit (20) as a heat source unit. The outdoor unit (20) has a refrigerant circuit (2).

[0023] [Refrigerant Circuit] The refrigerant circuit (2) is filled with, for example, a flammable natural refrigerant. The flammable natural refrigerant is, for example, propane. Propane is a refrigerant with a higher specific gravity than air. The refrigerant circuit (2) performs a refrigeration cycle by circulating the refrigerant.

[0024] [Fluid Circuit] The refrigeration cycle apparatus (1) has a fluid circuit (12). Water flows through the fluid circuit (12) as a heat medium. A water heat exchanger (15) and a fluid pump (16) are connected to the fluid circuit (12). The fluid pump (16) circulates the water in the fluid circuit (12). The fluid heated in the water heat exchanger (15) is supplied to a hot water supply tank (not shown), which is the supply destination. The water in the hot water supply tank returns to the fluid circuit (12) and is heated again in the water heat exchanger (15).

[0025] [Outdoor Unit] The outdoor unit (20) includes a refrigerant cylinder (5), a water heat exchanger (15), an outdoor heat exchanger (21), an outdoor fan (22), an outdoor expansion valve (23), a four-way switching valve (24), an accumulator (25), and a compressor (30). The outdoor heat exchanger (21), the outdoor expansion valve (23), the four-way switching valve (24), and the compressor (30) are connected by a pipe (26).

[0026] The refrigerant cylinder (5) is filled with refrigerant. The refrigerant cylinder (5) is connected, for example, to a pipe branching off from a pipe (26) connecting the four-way selector valve (24) and the accumulator (25). After the outdoor unit (20) is transported to the installation site, the refrigerant cylinder (5) opens the on-off valve (6) of the refrigerant cylinder (5) to fill the refrigerant circuit (2) with refrigerant. This arrangement can prevent flammable refrigerant from leaking from the refrigerant circuit (2) during transportation of the outdoor unit (20).

[0027] The water heat exchanger (15) is connected to the pipe (26) of the refrigerant circuit (2) and the fluid pipe (17) of the fluid circuit (12). The water heat exchanger (15) exchanges heat between the "refrigerant flowing through the pipe (26)" and the "water (fluid) flowing through the fluid pipe (17) of the fluid circuit (12)." For example, the water heat exchanger (15) is configured as a plate heat exchanger. The water heat exchanger (15) has a refrigerant flow path to which the pipe (26) of the refrigerant circuit (2) is connected and a water flow path (fluid flow path) to which the fluid pipe (17) of the fluid circuit (12) is connected, and exchanges heat between the refrigerant flowing through the refrigerant flow path and the water flowing through the water flow path. The refrigerant flow path and the water flow path are formed in a plurality of plate members in the water heat exchanger (15).

[0028] The outdoor heat exchanger (21) is, for example, a cross-fin type fin-and-tube heat exchanger. The outdoor heat exchanger (21) exchanges heat between the refrigerant flowing through the outdoor heat exchanger (21) and the air blown by the outdoor fan (22). The outdoor expansion valve (23) is, for example, an electronic expansion valve. The outdoor heat exchanger (21) is an example of a heat source side heat exchanger.

[0029] The four-way selector valve (24) has a first port (P1), a second port (P2), a third port (P3), and a fourth port (P4). The four-way selector valve (24) is switchable between a state in which the first port (P1) communicates with the third port (P3) and the second port (P2) communicates with the fourth port (P4) (a state indicated by a solid line in FIG. 1), and a state in which the first port (P1) communicates with the second port (P2) and the third port (P3) communicates with the fourth port (P4) (a state indicated by a dashed line in FIG. 1).

[0030] The compressor (30) compresses the refrigerant. The compressor (30) is, for example, a rotary compressor such as a scroll compressor. A four-way switching valve (24) is connected to a pipe (26) on the discharge side of the compressor (30). An accumulator (25) is connected to a pipe (26) on the suction side of the compressor (30).

[0031] [Internal Configuration of Outdoor Unit] For ease of explanation, arrows are used to indicate up / down, front / rear, left / right directions in each drawing. Unless otherwise specified, up / down and other directions will be described according to the directions indicated by these arrows.

[0032] As shown in Figures 2 and 3, the outdoor unit (20) has a casing (70). The casing (70) is formed in a box shape. The casing (70) is made of, for example, a metal plate. The casing (70) has an upper panel (71), a bottom panel (72), a front panel (73), a rear panel (74), a left panel (75), and a right panel (76).

[0033] A partition member (28) is disposed upright inside the casing (70). The partition member (28) is formed, for example, from a metal plate. The partition member (28) divides the interior of the casing (70) into a "machine chamber (S1) as an internal space" and a "fan chamber (S2)."

[0034] The fan chamber (S2) is a space inside the casing (70) to the left of the partition member (28) in Fig. 2. The fan chamber (S2) accommodates an outdoor fan (22) and an outdoor heat exchanger (21). The outdoor fan (22) has a fan motor (22a).

[0035] The casing (70) is formed with an inlet (701) and an outlet (702). The inlet (701) is formed in the rear panel (74) and the left panel (75). The outlet (702) is formed in the front panel (73). When the outdoor fan (22) is rotated by the fan motor (22a), air drawn into the blower chamber (S2) through the inlet (701) exchanges heat with the refrigerant flowing through the outdoor heat exchanger (21). The air after heat exchange is blown out of the outdoor unit (20) through the outlet (702). In FIG. 3 , the air flow is indicated by white arrows.

[0036] The machinery chamber (S1) is a space inside the casing (70) to the right of the partition member (28) in Fig. 2. The machinery chamber (S1) accommodates a refrigerant cylinder (5), a pipe group (8), a water heat exchanger (15), an accumulator (25), a compressor (30), and a sound insulating member (60).

[0037] The compressor (30) has support legs (31). The support legs (31) are supported by a plurality of first vibration-isolating members (41). The first vibration-isolating members (41) are supported by a first support member (51). The first support member (51) is supported by a plurality of second vibration-isolating members (42). The second vibration-isolating members (42) are supported by a second support member (52). In the example shown in FIG. 2 , the second support member (52) is a bottom plate (72) of the casing (70).

[0038] The first vibration-isolating member (41) and the second vibration-isolating member (42) are made of rubber or urethane. The material and spring constant of the first vibration-isolating member (41) and the material and spring constant of the second vibration-isolating member (42) may be the same as or different from each other.

[0039] The compressor (30) is disposed on a double vibration-isolating structure including a first vibration-isolating member (41), a first support member (51), and a second vibration-isolating member (42). Therefore, even if the compressor (30) vibrates during operation of the refrigeration cycle apparatus (1), the transmission of the vibration and the generation of noise are suppressed. For example, the vibration of the compressor (30) is damped by the first vibration-isolating member (41) and the second vibration-isolating member (42) before being transmitted to the bottom plate (72).

[0040] The refrigerant cylinder (5) and the water heat exchanger (15) are supported by a first support member (51). The accumulator (25) is supported by a stay (not shown) at a position spaced apart from the first support member (51).

[0041] The sound insulating member (60) is formed in a box shape with an opening at the bottom. The sound insulating member (60) is supported on the bottom plate (72) of the casing (70). The sound insulating member (60) is made of an air-impermeable material. The sound insulating member (60) is made of, for example, a metal plate or a rubber sheet.

[0042] The sound-insulating member (60) defines (forms) an accommodation space (65) that accommodates the compressor (30) and the water heat exchanger (15). The sound-insulating member (60) covers the compressor (30) and the water heat exchanger (15). The accommodation space (65) of the sound-insulating member (60) accommodates the compressor (30) and the water heat exchanger (15), as well as the refrigerant cylinder (5), the piping group (8), and the accumulator (25). The sound-insulating member (60) surrounds the compressor (30), the water heat exchanger (15), the refrigerant cylinder (5), the piping group (8), and the accumulator (25).

[0043] The piping group (8) includes a valve element (9) and a pipe (26). The valve element (9) includes an outdoor expansion valve (23), a four-way switching valve (24), and a solenoid valve (29). The piping group (8) may include an internal heat exchanger for exchanging heat between refrigerants, a muffler, a filter, etc. The valve element (9) may include an electric valve, a check valve, a three-way valve, etc.

[0044] A gap is provided between the outer surface of the sound-insulating member (60) and the inner surface of the casing (70). The sound-insulating member (60) and the casing (70) are disposed with a predetermined distance between them. The inner surface of the casing (70) includes the surface of the partition member (28) facing the machine chamber (S1).

[0045] A first sound absorbing member (61) is provided in the gap between the outer surface of the sound insulating member (60) and the inner surface of the casing (70). The first sound absorbing member (61) is made of, for example, urethane. The first sound absorbing member (61) is disposed on the outer surface of the upper wall, front wall, rear wall, left wall, and right wall of the sound insulating member (60).

[0046] Further, second sound absorbing members (62) are provided on the inner surface of the sound insulating member (60). The second sound absorbing members (62) are made of, for example, urethane. The second sound absorbing members (62) are respectively arranged on the inner surface of the upper wall, front wall, rear wall, left wall, and right wall of the sound insulating member (60).

[0047] [Main Parts of the Outdoor Unit (20)] Next, the main parts of the outdoor unit (20) will be described with reference to Figures 4, 5, and 6. Figure 4 corresponds to a plan cross-sectional view showing an enlarged view of the main parts of the outdoor unit (20). Figure 5 corresponds to a cross-section taken along line V-V in Figure 4, as viewed from the right side. Figure 6 corresponds to a cross-section taken along line VI-VI in Figure 5, as viewed from the rear side.

[0048] <Opening> As shown in Fig. 4 , an opening (70a) is formed in the casing (70). Similarly, an opening (60a) is formed in the sound insulating member (60), an opening (61a) is formed in the first sound absorbing member (61), and an opening (62a) is formed in the second sound absorbing member (62). Hereinafter, these openings will be referred to as "openings (60a, 61a, 62a, 70a)."

[0049] The fluid pipe (17) is inserted through the openings (60a, 61a, 62a, 70a). The cross-sectional shape of the openings (60a, 61a, 62a, 70a) (the shape of a cross section perpendicular to the direction in which the fluid pipe (17) is inserted) corresponds to the cross-sectional shape of the fluid pipe (17). In this example, the cross-sectional shape of the fluid pipe (17) is circular, and the cross-sectional shape of the openings (60a, 61a, 62a, 70a) is circular and larger than the cross-sectional shape of the fluid pipe (17).

[0050] <Water Heat Exchanger> The water heat exchanger (15) is accommodated in the machine room (S1) together with the compressor (30). As shown in Figures 5 and 6, in this example, the water heat exchanger (15) is placed on a first support member (51). The water heat exchanger (15) is not fixed to the first support member (51). The first support member (51) is a plate-shaped member, and is made of, for example, metal. The first support member (51) is supported by a plurality of second vibration-isolating members (42).

[0051] The first support member (51) is an example of a mounting member (81) on which the water heat exchanger (15) is mounted. The second vibration-isolating member (42) supporting the first support member (51) is an example of a vibration-isolating member (82) supporting the mounting member (81).

[0052] <Fluid Piping> The fluid pipe (17) is inserted through the openings (60a, 61a, 62a, 70a) and connected to the water heat exchanger (15). In this example, two fluid pipes (17) are connected to the water heat exchanger (15). One of the two fluid pipes (17) is connected to an inlet of a water flow path of the water heat exchanger (15), and the other of the two fluid pipes (17) is connected to an outlet of the water flow path of the water heat exchanger (15). The inlet and the outlet of the water flow path of the water heat exchanger (15) are provided on a connection surface, which is one surface of the water heat exchanger (15) (in this example, the rear surface in the installed state).

[0053] In this example, the two fluid pipes (17) extend parallel to each other in the front-rear direction within the machine room (S1), spaced apart from each other at a predetermined interval in the vertical and horizontal directions, and are connected to the inlet and outlet of a water flow path provided on the connection surface of the water heat exchanger (15). As shown in Fig. 6, when viewed from the rear side of the outdoor unit (20), the two fluid pipes (17) face each other at a predetermined interval in an oblique direction from the upper right to the lower left.

[0054] The diagonal direction from the upper right to the lower left is an example of a diagonal direction from one side in the left-right direction and one side in the up-down direction to the other side in the left-right direction and one side in the up-down direction. The front-rear direction, which is the extension direction of the fluid pipe (17), is an example of a direction along the horizontal direction. The left-right direction is an example of a direction perpendicular to the extension direction of the fluid pipe (17) and along the horizontal direction.

[0055] <Supporting Part> A supporting part (18) is disposed near the water heat exchanger (15). The supporting part (18) is disposed in the machine room (S1), which is the internal space of the casing (70), and supports the fluid piping (17). In this example, the supporting part (18) is fixed to the mounting member (81). The supporting part (18) also supports the fluid piping (17) such that the fluid piping (17) is inserted into the openings (70a, 60a, 61a, 62a) with a predetermined gap between the openings (70a, 60a, 61a, 62a).

[0056] The above-mentioned "state in which the fluid pipe (17) is separated from the openings (70a, 60a, 61a, 62a) by a predetermined gap" specifically means a state in which the outer peripheral surface of the fluid pipe (17) and the inner peripheral surface of the openings (70a, 60a, 61a, 62a) face each other at a predetermined distance over the entire circumference. For example, the length of the predetermined gap (predetermined distance) is 5 mm.

[0057] The support portion (18) has a base (18a) and a mounting fixture (18b). The base (18a) is provided with a recess (18c). In this example, the support portion (18) has two mounting fixtures (18b) corresponding to the two fluid pipes (17). The base (18a) is provided with two recesses (18c) corresponding to the two fluid pipes (17).

[0058] The base (18a) is fixed to the mounting member (81). For example, the base (18a) is a plate-shaped member made of metal. The base (18a) is fastened to the mounting member (81) with screws. By releasing the screws, the base (18a) can be removed from the mounting member (81).

[0059] The fluid pipe (17) is fitted into the recess (18c) of the base (18a). The cross-sectional shape of the recess (18c) (the shape of a cross section perpendicular to the extension direction of the fluid pipe (17)) corresponds to the cross-sectional shape of the fluid pipe (17). As shown in FIG. 6 , in this example, the cross-sectional shape of the recess (18c) is an arc (specifically, a semicircular arc) having a diameter larger than the diameter of the fluid pipe (17). Furthermore, the recess (18c) is concave in a predetermined direction (from the lower right in this example) so that the fluid pipe (17) can be fitted into it.

[0060] The mounting fixture (18b) is attached to the base (18a) to fix the fluid pipe (17) fitted into the recess (18c) of the base (18a). In this example, the mounting fixture (18b) has a curved portion having a cross-sectional shape corresponding to the cross-sectional shape of the fluid pipe (17) (the shape of the cross section perpendicular to the extension direction of the fluid pipe (17)), and a fixing portion connected to the curved portion.

[0061] With the fluid pipe (17) sandwiched between the curved portion of the mounting fixture (18b) and the recessed portion (18c) of the base (18a), the fixing portion of the mounting fixture (18b) is screwed to the base (18a), thereby fixing and supporting the fluid pipe (17). Furthermore, by releasing the screws of the mounting fixture (18b), the mounting fixture (18b) can be removed from the base (18a), and the fluid pipe (17) can be removed from the recessed portion (18c) of the base (18a).

[0062] Comparison Between the Embodiment and Comparative Example Next, the outdoor unit (20) of the embodiment will be compared with the comparative example, with the outdoor unit (20) not provided with the support portion (18) being referred to as the “comparative example.” For ease of explanation, the components of the comparative example will be designated by the same reference numerals as those of the outdoor unit (20) of the embodiment.

[0063] In the case of the above comparative example (the outdoor unit (20) not provided with the support portion (18)), the only part in the outdoor unit (20) that supports the fluid piping (17) is the connection between the water heat exchanger (15) and the fluid piping (17) (specifically, the inlet or outlet of the water flow path included in the water heat exchanger (15)). Therefore, when installing (or removing) the water heat exchanger (15) or the fluid piping (17), a force (stress) applied to the fluid piping (17) is transmitted to the water heat exchanger (15) via the connection between the water heat exchanger (15) and the fluid piping (17). As a result, the force may damage components in the water heat exchanger (15) (for example, plates that form the refrigerant flow path and the water flow path).

[0064] In addition, when vibrations in the outdoor unit (20) are transmitted to the fluid piping (17), as in the above example, the force applied to the fluid piping (17) is transmitted to the water heat exchanger (15), and this force may cause damage to the water heat exchanger.

[0065] On the other hand, in the outdoor unit (20) of this embodiment, the support (18) supporting the fluid piping (17) prevents the force applied to the fluid piping (17) from being transmitted to the water heat exchanger (15), thereby preventing the water heat exchanger (15) from being damaged by the force transmitted from the fluid piping (17).

[0066] Effect of the embodiment As described above, in the refrigeration cycle apparatus (1) of the embodiment, the casing (70) has an opening (70a). The compressor (30) and the water heat exchanger (15) are disposed in the internal space (S1) of the casing (70). The fluid pipe (17) is inserted through the opening (70a) of the casing (70) and connected to the water heat exchanger (15). The support (18) is disposed in the internal space (S1) of the casing (70) and supports the fluid pipe (17).

[0067] In the above configuration, the support (18) supporting the fluid pipe (17) can inhibit the transmission of force (stress) applied to the fluid pipe (17). This can prevent the force applied to the fluid pipe (17) from being transmitted to the water heat exchanger (15). As a result, damage to the water heat exchanger (15) due to the force transmitted from the fluid pipe (17) can be prevented.

[0068] In the refrigeration cycle apparatus (1) of the embodiment, the outdoor unit (20) includes a mounting member (81) on which the water heat exchanger (15) is mounted, and a vibration-isolating member (82) that supports the mounting member (81). The support portion (18) is fixed to the mounting member (81).

[0069] In the above configuration, the mounting member (81) on which the water heat exchanger (15) and the support portion (18) are disposed is supported by the vibration-isolating member (82), thereby suppressing vibration of the water heat exchanger (15) and the support portion (18). Furthermore, since the water heat exchanger (15) and the support portion (18) can be disposed in the same vibration system, the force applied to the water heat exchanger (15) due to the difference in vibration between the water heat exchanger (15) and the support portion (18) can be reduced.

[0070] In addition, in the embodiment of the refrigeration cycle device (1), the support portion (18) supports the fluid piping (17) so that the fluid piping (17) is inserted into the opening (70a) of the casing (70) with a predetermined gap between the opening (70a) of the casing (70).

[0071] In the above-described configuration, contact between the fluid pipe (17) and the opening (70a) of the casing (70) can be prevented, thereby preventing contact noise and reducing noise from the outdoor unit (20).

[0072] In the refrigeration cycle apparatus (1) of the embodiment, the outdoor unit (20) is disposed in the internal space (S1) of the casing (70) and includes a sound-insulating member (60) that surrounds the compressor (30) and the water heat exchanger (15). The sound-insulating member (60) has an opening (60a). The support (18) supports the fluid piping (17) such that the fluid piping (17) is inserted through the opening (70a) of the casing (70) and the opening (60a) of the sound-insulating member (60) with a predetermined gap between them.

[0073] In the above configuration, the double sound insulation structure of the sound insulation member (60) and the casing (70) can prevent radiant sound and vibration sound from the compressor (30) and the water heat exchanger (15) from leaking to the outside.

[0074] Furthermore, the above configuration can prevent contact between the "fluid pipe (17)" and the "opening (70a) of the casing (70) and the opening (60a) of the sound insulating member (60)," thereby preventing contact noise. This reduces the noise of the outdoor unit (20).

[0075] In the refrigeration cycle apparatus (1) of the embodiment, the outdoor unit (20) includes a first sound absorbing member (61). The first sound absorbing member (61) is provided between the outer surface of the sound insulating member (60) and the inner surface of the casing (70).

[0076] In the above-described configuration, the first sound-absorbing member (61) can suppress a decrease in sound insulation performance due to the low-frequency resonance transmission phenomenon, thereby improving the soundproofing effect.

[0077] Specifically, when two plates form a double structure with a hollow space between them, the two plates become two masses, and the air in the hollow space acts as a spring connecting them, causing them to vibrate, resulting in a resonance phenomenon. In this case, the transmission loss is lower than the mass law, and sound insulation performance deteriorates. This phenomenon generally occurs in the low frequency range, so it is called the low frequency resonance transmission phenomenon.

[0078] In contrast, in the refrigeration cycle device (1) of the embodiment, a first sound-absorbing member (61) is provided in the gap between the outer surface of the sound-insulating member (60) and the inner surface of the casing (70), thereby suppressing the occurrence of a resonance phenomenon in which the air in the gap between the sound-insulating member (60) and the casing (70) acts as a spring and vibrates.

[0079] In the refrigeration cycle apparatus (1) of the embodiment, the outdoor unit (20) includes a second sound absorbing member (62). The second sound absorbing member (62) is provided on the inner surface of the sound insulating member (60).

[0080] In the above-described configuration, the second sound absorbing member (62) absorbs the radiated sound and vibration sound from the compressor (30) and the water heat exchanger (15), thereby improving the soundproofing effect.

[0081] Specifically, when the compressor (30) and the water heat exchanger (15), which are sound sources, are enclosed in a sound-insulating member (60), which is a box-shaped member, the sound is reflected by the sound-insulating member (60), causing a phenomenon known as build-up, in which the sound pressure level around the compressor (30) and the water heat exchanger (15) increases compared to when the sound-insulating member (60) is not present.

[0082] As a result, the sound pressure level outside the sound insulating member (60) is equal to the sound pressure level without the sound insulating member (60) minus the transmission loss and build-up of the sound insulating member (60). Therefore, the amount of sound reduction achieved by providing the sound insulating member (60) is smaller than the value expected based on the transmission loss.

[0083] Therefore, in the refrigeration cycle apparatus (1) of this embodiment, a second sound absorbing member (62) is provided on the inner surface of the sound insulating member (60) to attenuate the sound pressure level inside the sound insulating member (60), thereby suppressing buildup.

[0084] In addition, in the embodiment of the refrigeration cycle apparatus (1), the support portion (18) supports the fluid piping (17) so that the fluid piping (17) is inserted into the openings (70a, 60a, 61a, 62a) with a predetermined gap between the openings (70a, 60a, 61a, 62a).

[0085] In the above-described configuration, contact between the fluid pipe (17) and the openings (70a, 60a, 61a, 62a) can be suppressed, thereby suppressing the generation of contact noise, thereby reducing the noise of the outdoor unit (20).

[0086] 7 illustrates a main part of an outdoor unit (20) according to a modification of the embodiment. The outdoor unit (20) according to the modification of the embodiment includes a heat insulating member (63) in addition to the configuration of the outdoor unit (20) according to the embodiment.

[0087] The heat insulating member (63) has elasticity and is wrapped around the fluid pipe (17). For example, the heat insulating member (63) is a sheet-like member made of an insulating material such as glass wool that has elasticity, heat insulating properties, and sound absorbing properties. In this example, the heat insulating member (63) covers the entire periphery of the portion of the fluid pipe (17) that is located within the openings (60a, 61a, 62a, 70a).

[0088] In the modified embodiment, the support portion (18) supports the fluid piping (17) around which the heat insulating member (63) is wrapped so that the fluid piping (17) is inserted into the openings (60a, 61a, 62a, 70a) with a predetermined gap between the openings (60a, 61a, 62a, 70a). The other configurations of the outdoor unit (20) of the embodiment are similar to those of the outdoor unit (20) of the embodiment.

[0089] [Advantages of Modified Example of Embodiment] The refrigeration cycle apparatus (1) of the modified example of the embodiment can provide advantages similar to those of the refrigeration cycle apparatus (1) of the embodiment.

[0090] In addition, in the refrigeration cycle apparatus (1) of the modified embodiment, the outdoor unit (20) includes a heat insulating member (63). The heat insulating member (63) is elastic and is wrapped around the fluid piping (17). The support (18) supports the fluid piping (17) such that the fluid piping (17) around which the heat insulating member (63) is wrapped is inserted into the opening (70a) of the casing (70) and the opening (60a) of the sound insulating member (60) with a predetermined gap between them.

[0091] In the above configuration, by wrapping the elastic heat insulating member (63) around the fluid pipe (17), even if the fluid pipe (17) around which the heat insulating member (63) is wrapped comes into contact with the opening (70a) of the casing (70) and the opening (60a) of the sound insulating member (60), the elasticity of the heat insulating member (63) can suppress contact noise, thereby reducing the noise of the outdoor unit (20).

[0092] In addition, in the refrigeration cycle apparatus (1) of the modified embodiment, the support portion (18) supports the fluid piping (17) so that the fluid piping (17) wrapped with the insulating member (63) is inserted into the openings (70a, 60a, 61a, 62a) with a predetermined gap between the openings (70a, 60a, 61a, 62a).

[0093] In the above configuration, even if the fluid pipe (17) around which the heat insulating member (63) is wound comes into contact with the openings (70a, 60a, 61a, 62a), the elasticity of the heat insulating member (63) can suppress the contact noise, thereby reducing the noise of the outdoor unit (20).

[0094] (Other Embodiments) In the above description, the following configurations or settings may also be used.

[0095] The outdoor unit (20) does not necessarily have to include the first sound absorbing member (61) and the second sound absorbing member (62). The outdoor unit (20) does not necessarily have to include the vibration isolating member (82). The mounting member (81) does not necessarily have to be supported by the vibration isolating member (82). For example, the mounting member (81) may be the bottom plate (72) of the casing (70).

[0096] The refrigeration cycle apparatus (1) may supply the water heated in the water heat exchanger (15) to a supply target other than the hot water tank, such as a bath, a shower, a floor heating system, an air heat exchanger, and the like.

[0097] The heat source unit (20) does not necessarily have to be installed outdoors, but may be installed indoors. In this case, the heat source side heat exchanger may be configured as a heat exchanger that exchanges heat between a heat medium such as water and a refrigerant, instead of the outdoor heat exchanger (21).

[0098] Although the embodiments and modifications have been described, it will be understood that various modifications in form and details are possible without departing from the spirit and scope of the claims. Furthermore, elements of the above-described embodiments, modifications, and other embodiments may be combined or substituted as appropriate.

[0099] Furthermore, the terms "first," "second," "third," etc. in the specification and claims are used to distinguish between the terms to which these terms are attached, and do not limit the number or order of the terms.

[0100] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful as a heat source unit and a refrigeration cycle device.

[0101] DESCRIPTION OF SYMBOLS 1 Refrigeration cycle device 15 Water heat exchanger 17 Fluid piping 18 Support part 20 Outdoor unit (heat source unit) 30 Compressor 41 First vibration-isolating member 42 Second vibration-isolating member 51 First support member 52 Second support member 60 Sound-insulating member 60a Opening 61 First sound-absorbing member 61a Opening 62 Second sound-absorbing member 62a Opening 63 Heat-insulating member 65 Storage space 70 Casing 70a Opening 81 Mounting member 82 Vibration-isolating member S1 Machine room (internal space)

Claims

1. A heat source unit comprising: a casing (70) having an opening (70a) formed therein; a compressor (30) and a water heat exchanger (15) disposed in an internal space (S1) of the casing (70); a fluid piping (17) inserted through the opening (70a) of the casing (70) and connected to the water heat exchanger (15); and a support part (18) disposed in the internal space (S1) of the casing (70) and supporting the fluid piping (17).

2. A heat source unit according to claim 1, comprising: a mounting member (81) on which the water heat exchanger (15) is mounted; and a vibration-isolating member (82) supporting the mounting member (81), wherein the support part (18) is fixed to the mounting member (81).

3. A heat source unit according to claim 1 or 2, wherein the support portion (18) supports the fluid piping (17) so that the fluid piping (17) is inserted into the opening (70a) of the casing (70) with a predetermined gap between the opening (70a) and the casing (70).

4. A heat source unit according to claim 3, further comprising: a sound-insulating member (60) disposed in an internal space (S1) of the casing (70) and surrounding the compressor (30) and the water heat exchanger (15), wherein an opening (60a) is formed in the sound-insulating member (60), and wherein the support portion (18) supports the fluid piping (17) such that the fluid piping (17) is inserted into the opening (70a) of the casing (70) and the opening (60a) of the sound-insulating member (60) with a predetermined gap between them.

5. A heat source unit according to claim 4, further comprising an insulating member (63) having elasticity and wound around said fluid piping (17), and said support part (18) supports said fluid piping (17) such that said fluid piping (17) around which said insulating member (63) is wound is inserted into an opening (70a) of said casing (70) and an opening (60a) of said sound insulation member (60) with a predetermined gap between them.

6. The heat source unit according to claim 4 or 5, further comprising a first sound absorbing member (61) provided between an outer surface of the sound insulating member (60) and an inner surface of the casing (70).

7. The heat source unit according to claim 6, further comprising a second sound absorbing member (62) provided on the inner surface of the sound insulating member (60).

8. A refrigeration cycle device comprising a heat source unit according to any one of claims 1 to 7.

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