Heat source unit and refrigeration cycle device

Abstract

To restrain radiation sound and vibration sound from a compressor and an accumulator from leaking to the outside.SOLUTION: A compressor (30), an accumulator (25), and a sound insulating member (60) are arranged in an internal space (S1) of a casing (70). The sound insulating member (60) covers the compressor (30) and the accumulator (25) so as to partition a housing space (65) housing the compressor (30) and the accumulator (25). A first sound absorbing material (61) is provided between an outer surface of the sound insulating member (60) and an inner surface of the casing (70).SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[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 invention of Patent Document 1, sound absorbing material is attached to the inner surface of the soundproof box sheet metal that forms the side and top surfaces of the compressor soundproof box. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6501908 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the heat source unit, in addition to the noise generated by the compressor, for example, radiation sound and vibration sound from the accumulator may leak to the outside.

[0005] Here, since noise regulation standards have become stricter in recent years, the inventors of the present application have investigated a new structure for further improving the soundproofing effect of the heat source unit.

[0006] An object of the present disclosure is to suppress radiated sound and vibration sound from a compressor and an accumulator from leaking to the outside. [Means for solving the problem]

[0007] A first aspect of the present disclosure includes a casing (70), a compressor (30) disposed in an internal space (S1) of the casing (70) and compressing a refrigerant, an accumulator (25) disposed in the internal space (S1) and connected to the compressor (30), a sound-proofing member (60) disposed in the internal space (S1) and covering the compressor (30) and the accumulator (25) so as to define an accommodation space (65) that accommodates the compressor (30) and the accumulator (25), and a first sound-absorbing material (61) provided between an outer surface of the sound-proofing member (60) and an inner surface of the casing (70).

[0008] In the first aspect, the double sound-insulating structure of the sound-insulating member (60) and the casing (70) can prevent radiated sound and vibration sound from the compressor (30) and the accumulator (25) from leaking to the outside. In addition, the first sound-absorbing material (61) can prevent a decrease in sound-insulating performance due to a low-frequency resonance transmission phenomenon, thereby improving the soundproofing effect.

[0009] A second aspect of the present disclosure is the heat source unit of the first aspect, further comprising a second sound absorbing material (62) provided on the inner surface of the sound insulation member (60).

[0010] In the second aspect, the second sound-absorbing material (62) absorbs the radiated sound and vibration sound from the compressor (30) and the accumulator (25), thereby improving the soundproofing effect.

[0011] A third aspect of the present disclosure is a heat source unit of the first or second aspect, comprising a first vibration-isolating member (41) supporting the compressor (30), a first support member (51) supporting the first vibration-isolating member (41), a second vibration-isolating member (42) supporting the first support member (51), and a second support member (52) supporting the second vibration-isolating member (42).

[0012] In the third aspect, the compressor (30) is supported by a two-layer vibration-proof structure in which the first vibration-proof member (41) and the second vibration-proof member (42) are stacked, thereby making it possible to attenuate vibrations of the compressor (30).

[0013] A fourth aspect of the present disclosure is the heat source unit of any one of the first to third aspects, further comprising a water heat exchanger (15) disposed in the accommodation space (65) of the sound insulation member (60).

[0014] In the fourth aspect, the sound insulation member (60) can prevent sound generated in the water heat exchanger (15) from leaking to the outside.

[0015] A fifth aspect of the present disclosure is the heat source unit of any one of the first to fourth aspects, further comprising a valve body (9) disposed in the accommodation space (65) of the sound insulation member (60).

[0016] In the fifth aspect, the sound-proofing member (60) can prevent the sound of the refrigerant passing through the valve body (9) from leaking to the outside.

[0017] A sixth aspect of the present disclosure is a refrigeration cycle apparatus including the heat source unit (20) according to any one of the first to fifth aspects.

[0018] In a sixth aspect, a refrigeration cycle apparatus including the heat source unit (20) can be provided. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a refrigerant circuit diagram of the refrigeration cycle device of the first embodiment. [Diagram 2] FIG. 2 is a front cross-sectional view showing the configuration of the heat source unit. [Diagram 3] FIG. 3 is a plan cross-sectional view showing the configuration of the heat source unit. [Figure 4] FIG. 4 is a front cross-sectional view showing the configuration of the heat source unit of the second embodiment. [Diagram 5] FIG. 5 is a front cross-sectional view showing the configuration of the heat source unit of the third embodiment. [Figure 6] FIG. 6 is a plan cross-sectional view showing the configuration of the heat source unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] First Embodiment As shown in FIG. 1, the refrigeration cycle apparatus (1) is a hot water supply refrigeration cycle apparatus having an outdoor unit (20) as a heat source unit. The outdoor unit (20) has a refrigerant circuit (2). 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 that has a higher specific gravity than air. The refrigerant circuit (2) performs a refrigeration cycle by circulating the refrigerant.

[0021] <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 tank, which is a supply destination. The water in the hot water tank returns to the fluid circuit (12) and is heated again in the water heat exchanger (15).

[0022] <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 pipes (26).

[0023] 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 switching 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 makes it possible to prevent flammable refrigerant from leaking from the refrigerant circuit (2) during transportation of the outdoor unit (20).

[0024] A pipe (26) of the refrigerant circuit (2) is connected to the water heat exchanger (15). The water heat exchanger (15) exchanges heat between the refrigerant flowing through the pipe (26) and the water flowing through the fluid pipe (17) of the fluid circuit (12).

[0025] The outdoor heat exchanger (21) is, for example, a cross-fin type fin-and-tube heat exchanger. Specifically, the outdoor heat exchanger (21) is a so-called plug-in fin type microchannel heat exchanger. In the outdoor heat exchanger (21), heat is exchanged 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.

[0026] The four-way switching valve (24) has a first port (P1), a second port (P2), a third port (P3), and a fourth port (P4). The four-way switching valve (24) is in 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) (the state shown by the solid lines in FIG. 1).

[0027] 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).

[0028] <Internal structure of outdoor unit> In the following description, arrows are used to indicate up / down, front / back, left / right directions in each drawing. Unless otherwise specified, the up / down directions will be described according to the directions indicated by these arrows.

[0029] 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).

[0030] 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) and a fan chamber (S2) as internal spaces.

[0031] The fan chamber (S2) is a space inside the casing (70) to the left of the partition member (28) in Fig. 2. The outdoor fan (22), the fan motor (22a), and the outdoor heat exchanger (21) are disposed in the fan chamber (S2).

[0032] The casing (70) has an inlet (70a) and an outlet (70b). The inlet (70a) is formed in the rear panel (74) and the left panel (75). The outlet (70b) is formed in the front panel (73). When the outdoor fan (22) is rotated by the fan motor (22a), air sucked into the blower chamber (S2) through the inlet (70a) exchanges heat with refrigerant flowing through the outdoor heat exchanger (21). The air after heat exchange is blown out of the outdoor unit (20) through the outlet (70b). In FIG. 3, the air flow is indicated by white arrows.

[0033] The machine room (S1) is a space inside the casing (70) and located to the right of the partition member (28) in Fig. 2. The machine room (S1) accommodates a refrigerant cylinder (5), a pipe group (8), a water heat exchanger (15), an accumulator (25), a compressor (30), and a sound insulation member (60).

[0034] 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 made of, for example, rubber or urethane. The first vibration-isolating members (41) are supported by a bottom plate (72) of the casing (70). Thus, even if the compressor (30) vibrates during operation of the refrigeration cycle apparatus (1), the vibration is damped by the first vibration-isolating members (41) before being transmitted to the bottom plate (72).

[0035] The refrigerant cylinder (5) and the water heat exchanger (15) are supported on a bottom plate (72) of the casing (70). The accumulator (25) is supported by a stay (not shown) at a position separated from the bottom plate (72) of the casing (70).

[0036] The sound-insulating member (60) is formed in a box shape that is open downward. The sound-insulating member (60) is supported by a bottom plate (72) of the casing (70). The sound-insulating member (60) is made of a non-breathable material. The sound-insulating member (60) is made of, for example, a metal plate or a rubber sheet.

[0037] The sound-insulating member (60) defines an accommodation space (65) that accommodates the compressor (30) and the accumulator (25). The sound-insulating member (60) covers the compressor (30) and the accumulator (25). In addition to the compressor (30) and the accumulator (25), the accommodation space (65) of the sound-insulating member (60) accommodates the refrigerant cylinder (5), the pipe group (8), and the water heat exchanger (15). The sound-insulating member (60) covers the refrigerant cylinder (5), the pipe group (8), and the water heat exchanger (15).

[0038] 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 the refrigerants, a muffler, a filter, etc. The valve element (9) may include a motor-operated valve, a check valve, a three-way valve, etc.

[0039] A gap is provided between the outer surface of the sound insulation member (60) and the inner surface of the casing (70). The inner surface of the casing (70) includes the surface of the partition member (28) facing the machine chamber (S1). A first sound absorbing material (61) is provided in the gap between the outer surface of the sound insulation member (60) and the inner surface of the casing (70). The first sound absorbing material (61) is made of, for example, urethane. The first sound absorbing materials (61) are respectively arranged on the outer surface sides of the upper wall, front wall, rear wall, left wall, and right wall of the sound insulation member (60).

[0040] -Effects of embodiment 1- According to the features of the present embodiment, the double sound-insulating structure of the sound-insulating member (60) and the casing (70) can prevent radiated sound and vibration sound from the compressor (30) and the accumulator (25) from leaking to the outside. In addition, the first sound-absorbing material (61) can prevent a decrease in sound-insulating performance due to a low-frequency resonance transmission phenomenon, thereby improving the soundproofing effect.

[0041] 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 is reduced. This phenomenon generally occurs in the low frequency range, so it is called the low frequency resonance transmission phenomenon.

[0042] In contrast, in the present embodiment, the first sound-absorbing material (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 making it possible to suppress the occurrence of the resonance phenomenon in which the air in the gap between the sound-insulating member (60) and the casing (70) acts as a spring to vibrate.

[0043] According to the feature of this embodiment, the sound insulation member (60) can prevent sound generated in the water heat exchanger (15) from leaking to the outside.

[0044] According to the feature of this embodiment, the sound-proofing member (60) can prevent refrigerant passing noise, which is generated when the refrigerant passes through the valve body (9), from leaking to the outside.

[0045] According to the features of the present embodiment, a refrigeration cycle apparatus (1) including a heat source unit (20) can be provided.

[0046] Second Embodiment Hereinafter, the same parts as those in the first embodiment will be denoted by the same reference numerals, and only the differences will be described.

[0047] As shown in Fig. 4, a second sound absorbing material (62) is provided on the inner surface of the sound insulation member (60). The second sound absorbing material (62) is made of, for example, urethane. The second sound absorbing materials (62) are arranged on the inner surfaces of the upper wall, front wall, rear wall, left wall, and right wall of the sound insulation member (60).

[0048] -Effects of embodiment 2- According to the feature of this embodiment, the second sound-absorbing material (62) absorbs radiated sound and vibration sound from the compressor (30) and the accumulator (25), thereby improving the soundproofing effect.

[0049] Specifically, when the compressor (30) and the accumulator (25), which are sound sources, are enclosed in a sound-proofing member (60), which is a box-shaped member, the sound is reflected by the sound-proofing member (60), causing a phenomenon known as build-up, in which the sound pressure level around the compressor (30) and the accumulator (25) increases compared to when the sound-proofing member (60) is not present.

[0050] As a result, the sound pressure level outside the sound insulation member (60) is equal to the sound pressure level without the sound insulation member (60) minus the transmission loss and build-up of the sound insulation member (60). Therefore, the amount of sound reduction achieved by providing the sound insulation member (60) is smaller than the value expected based on the transmission loss.

[0051] Therefore, in this embodiment, a second sound absorbing material (62) is provided on the inner surface of the sound insulation member (60) to attenuate the sound pressure level inside the sound insulation member (60), thereby making it possible to suppress build-up.

[0052] Third Embodiment As shown in Fig. 5 and Fig. 6, the compressor (30) has a support leg (31). The support leg (31) is 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. 5, the second support member (52) is a bottom plate (72) of the casing (70).

[0053] 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.

[0054] The compressor (30) is disposed on a double vibration-isolating structure including the first vibration-isolating member (41), the first support member (51), and the 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.

[0055] 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 away from the bottom plate (72) of the casing (70).

[0056] The sound insulation member (60) is supported by a bottom plate (72) of the casing (70). The sound insulation member (60) accommodates the compressor (30), the accumulator (25), the refrigerant cylinder (5), the pipe group (8), and the water heat exchanger (15) in the accommodation space (65). The sound insulation member (60) covers the compressor (30), the accumulator (25), the refrigerant cylinder (5), the pipe group (8), and the water heat exchanger (15).

[0057] A gap is provided between the outer surface of the sound insulation member (60) and the inner surface of the casing (70). A first sound absorbing material (61) is provided in the gap between the outer surface of the sound insulation member (60) and the inner surface of the casing (70). A second sound absorbing material (62) is provided on the inner surface of the sound insulation member (60).

[0058] -Effects of embodiment 3- According to a feature of the present embodiment, the compressor (30) is supported by a two-layer vibration-proof structure in which the first vibration-proof member (41) and the second vibration-proof member (42) are stacked, thereby making it possible to damp vibrations of the compressor (30).

[0059] This reduces vibrations transmitted from the compressor (30) to the first support member (51) and the second support member (52) and vibrations transmitted from the compressor (30) to the piping (26), thereby suppressing the generation of vibration noise caused by the vibrations of the first support member (51) and the second support member (52) and the piping (26).

[0060] Other Embodiments 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.

[0061] The heat source unit (20) of the refrigeration cycle apparatus (1) may not have a water heat exchanger (15) and may be connected to a utilization unit via a refrigerant pipe to form a refrigerant circuit. The utilization unit has a utilization heat exchanger that adjusts the temperature of air by a refrigerant. The utilization unit may be an air conditioning unit that conditions the target space. In this case, the air conditioning unit may be a ceiling-mounted type, a wall-mounted type, or a floor-standing type. The utilization unit may be a cooling unit that cools the air inside a storage unit. The cooling unit may cool the interior of a shipping container for sea or land use.

[0062] 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 is not the outdoor heat exchanger (21), but is configured as a heat exchanger that exchanges heat between a heat medium such as water and a refrigerant.

[0063] Although the embodiments and modifications have been described above, it will be understood that various modifications of form and details are possible without departing from the spirit and scope of the claims. In addition, the elements of the above embodiments, modifications, and other embodiments may be appropriately combined or substituted. In addition, the descriptions "first," "second," "third," etc. in the specification and claims are used to distinguish the words to which these descriptions are attached, and do not limit the number or order of the words. [Industrial Applicability]

[0064] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for a heat source unit and a refrigeration cycle apparatus. [Explanation of symbols]

[0065] 1 Refrigeration cycle equipment 9 Valve body 15 Water heat exchanger 20 Outdoor unit (heat source unit) 25 Accumulator 30 Compressor 41 First vibration-isolating member 42 Second vibration-isolating member 51 First support member 52 Second support member 60 Soundproofing materials 61 First sound absorbing material 62 Second sound absorbing material 65 Containment Space 70 Casing S1 Machine room (internal space)

Claims

1. A casing (70); a compressor (30) disposed in an internal space (S1) of the casing (70) and configured to compress a refrigerant; an accumulator (25) disposed in the internal space (S1) and connected to the compressor (30); a sound insulation member (60) that is disposed in the internal space (S1) and covers the compressor (30) and the accumulator (25) so as to define an accommodation space (65) that accommodates the compressor (30) and the accumulator (25); a first sound absorbing material (61) provided between an outer surface of the sound insulating member (60) and an inner surface of the casing (70). Heat source unit.

2. In the heat source unit of claim 1, A second sound absorbing material (62) is provided on the inner surface of the sound insulating member (60). Heat source unit.

3. In the heat source unit according to claim 1 or 2, a first vibration isolating member (41) for supporting the compressor (30); a first support member (51) that supports the first vibration isolating member (41); a second vibration isolating member (42) supporting the first support member (51); a second support member (52) that supports the second vibration isolating member (42); Heat source unit.

4. In the heat source unit according to claim 1 or 2, The sound-proofing member (60) includes a water heat exchanger (15) disposed in the accommodation space (65). Heat source unit.

5. In the heat source unit according to claim 1 or 2, The valve body (9) is disposed in the accommodation space (65) of the sound-proof member (60). Heat source unit.

6. The heat source unit (20) according to claim 1 or 2 is provided. Refrigeration cycle equipment.

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