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 gap is provided between an outer surface of the sound insulating member (60) and an inner surface of the casing (70). The length of the gap is 5 mm or more and 210 mm or less.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 a soundproof member (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] In light of the fact that noise regulation standards have become stricter in recent years, the inventors of the present application have studied a new structure for further enhancing the soundproofing effect of the heat source unit. The inventors have also studied the appropriate positional relationship between the casing of the heat source unit and the sound-insulating member.

[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) that is disposed in an internal space (S1) of the casing (70) and compresses a refrigerant, an accumulator (25) that is disposed in the internal space (S1) and connected to the compressor (30), and 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), wherein a gap is provided between an outer surface of the sound insulation member (60) and an inner surface of the casing (70), and the length of the gap, which is the shortest distance between the outer surface of the sound insulation member (60) and the inner surface of the casing (70) facing the outer surface of the sound insulation member (60), is 5 mm or more and 210 mm or less.

[0008] In the first aspect, the double sound insulation structure of the sound insulation 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, by appropriately setting the length of the gap, contact between the sound insulation member (60) and the casing (70) due to vibration can be prevented and the soundproofing effect can be improved.

[0009] A second aspect of the present disclosure is a heat source unit according to the first aspect, wherein a plurality of the gaps are provided along the periphery of the sound-proofing member (60), and the length of at least one of the plurality of gaps is 5 mm or more and 50 mm or less.

[0010] In the second aspect, by appropriately setting the length of the gap, it is possible to prevent the sound insulation member (60) from coming into contact with the casing (70) due to vibration and to improve the soundproofing effect.

[0011] A third aspect of the present disclosure is a heat source unit of the first or second aspect, wherein a part of the casing (70) has a first wall portion (81) that is detachable from the casing (70), and a part of the sound insulation member (60) has a second wall portion (82) that is detachable from the sound insulation member (60) at a position corresponding to the first wall portion (81) of the casing (70).

[0012] In the third aspect, the double sound insulation structure of the sound insulation member (60) and the casing (70) can prevent radiated sound and vibration sound from the compressor (30) from leaking to the outside. In addition, by removing the first wall portion (81) of the casing (70) and the second wall portion (82) of the sound insulation member (60), the interior of the accommodation space (65) of the sound insulation member (60) can be easily accessed, improving maintainability.

[0013] A fourth aspect of the present disclosure is a heat source unit of the third aspect, wherein the first wall portion (81) includes an upper wall portion of the casing (70), and the second wall portion (82) includes an upper wall portion of the sound insulation member (60).

[0014] In the fourth aspect, the first wall (81) and the second wall (82) can be removed from the top, thereby making it possible to access the accommodation space (65) of the sound insulation member (60) from the top.

[0015] A fifth aspect of the present disclosure is a heat source unit of the third or fourth aspect, in which a blower chamber (S2) is provided inside the casing (70), and a fan (22) is arranged in the blower chamber (S2), the air flow direction of the fan (22) is a first direction, the first wall portion (81) includes a wall portion of the casing (70) on the first direction side, and the second wall portion (82) includes a wall portion of the sound-proofing member (60) on the first direction side.

[0016] In the fifth aspect, the first wall portion (81) and the second wall portion (82) can be removed from the first direction, thereby making it possible to access the accommodation space (65) of the sound insulation member (60) from the first direction.

[0017] A sixth aspect of the present disclosure is a heat source unit according to any one of the third to fifth aspects, wherein a blower chamber (S2) is provided inside the casing (70), and a fan (22) is arranged in the blower chamber (S2), a direction of air flow by the fan (22) is a first direction, and a direction perpendicular to the first direction and the up-down direction is a second direction, the first wall portion (81) includes a wall portion of the casing (70) on the second direction side, and the second wall portion (82) includes a wall portion of the sound-proofing member (60) on the second direction side.

[0018] In the sixth aspect, the first wall portion (81) and the second wall portion (82) can be removed from the second direction, thereby making it possible to access the accommodation space (65) of the sound insulation member (60) from the second direction.

[0019] A seventh aspect of the present disclosure is the heat source unit of any one of the third to sixth aspects, further comprising 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).

[0020] In the seventh aspect, the first sound-absorbing material (61) can suppress deterioration of sound insulation performance due to the low-frequency resonance transmission phenomenon, and can improve the soundproofing effect.

[0021] An eighth aspect of the present disclosure is the heat source unit of any one of the third to seventh aspects, further comprising a second sound absorbing material (62) provided on the inner surface of the sound insulation member (60).

[0022] In the eighth aspect, the second sound-absorbing material (62) absorbs the radiated sound and vibration sound from the compressor (30), thereby improving the soundproofing effect.

[0023] A ninth aspect of the present disclosure is the heat source unit of the eighth aspect, further comprising a first sound-absorbing material (61) provided between an outer surface of the sound-proof member (60) and an inner surface of the casing (70).

[0024] In the ninth aspect, the first sound-absorbing material (61) can suppress deterioration of sound insulation performance due to the low-frequency resonance transmission phenomenon, and can improve the soundproofing effect.

[0025] A tenth aspect of the present disclosure is the heat source unit of the seventh aspect, wherein the first sound absorbing material (61) is attached to an inner surface of the first wall portion (81) of the casing (70).

[0026] In the tenth aspect, the first sound absorbing material (61) can be removed together with the first wall portion (81) of the casing (70).

[0027] An eleventh aspect of the present disclosure is the heat source unit of the eighth aspect, wherein the second sound absorbing material (62) is attached to an inner surface of the second wall portion (82) of the sound insulation member (60).

[0028] In the eleventh aspect, the second sound-absorbing material (62) can be removed together with the second wall portion (82) of the sound-proofing member (60).

[0029] A twelfth aspect of the present disclosure is a heat source unit of the ninth aspect, wherein the first sound-absorbing material (61) is attached to an inner surface of the first wall portion (81) of the casing (70), and the second sound-absorbing material (62) is attached to an inner surface of the second wall portion (82) of the sound-proofing member (60).

[0030] In the twelfth aspect, the first sound-absorbing material (61) can be removed together with the first wall (81) of the casing (70). Furthermore, the second sound-absorbing material (62) can be removed together with the second wall (82) of the sound insulation member (60).

[0031] A thirteenth aspect of the present disclosure is a heat source unit of any one of the first to twelfth aspects, 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).

[0032] In the thirteenth 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).

[0033] A fourteenth aspect of the present disclosure is a refrigeration cycle apparatus including the heat source unit (20) according to any one of the first to thirteenth aspects.

[0034] In a fourteenth aspect, a refrigeration cycle apparatus including a heat source unit (20) can be provided. [Brief description of the drawings]

[0035] [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 graph showing the relationship between the 1 / 3 octave band center frequency and the transmission loss. [Diagram 5] FIG. 5 is a front cross-sectional view showing the configuration of the heat source unit of the second embodiment. [Figure 6] FIG. 6 is a plan cross-sectional view showing the configuration of the heat source unit. [Figure 7] FIG. 7 is a front cross-sectional view showing the configuration of the heat source unit of the third embodiment. [Figure 8] FIG. 8 is a front cross-sectional view showing the configuration of the heat source unit of the fourth embodiment. [Figure 9] FIG. 9 is a plan cross-sectional view showing the configuration of the heat source unit. [Figure 10] FIG. 10 is a front cross-sectional view showing the configuration of the heat source unit of the fifth embodiment. [Figure 11] FIG. 11 is a plan cross-sectional view showing the configuration of the heat source unit. [Figure 12]FIG. 12 is a front cross-sectional view showing a state in which the first wall portion and the second wall portion on the upper surface side have been removed. [Figure 13] FIG. 13 is a view taken in the direction of the arrow A in FIG. [Figure 14] FIG. 14 is a plan cross-sectional view showing a state in which the first wall portion and the second wall portion on the front side and the first wall portion and the second wall portion on the right side have been removed. [Figure 15] FIG. 15 is a view seen in the direction of the arrow B in FIG. [Figure 16] FIG. 16 is a view taken in the direction of the arrow C in FIG. [Figure 17] FIG. 17 is a front cross-sectional view showing the configuration of the heat source unit of the sixth embodiment. [Figure 18] FIG. 18 is a plan cross-sectional view showing the configuration of the heat source unit. [Figure 19] FIG. 19 is a front cross-sectional view showing a state in which the first wall portion and the second wall portion on the upper surface side have been removed. [Figure 20] FIG. 20 is a plan cross-sectional view showing a state in which the first wall portion and the second wall portion on the front side and the first wall portion and the second wall portion on the right side have been removed. [Figure 21] FIG. 21 is a front cross-sectional view showing the configuration of the heat source unit of the seventh embodiment. [Figure 22] FIG. 22 is a plan cross-sectional view showing the configuration of the heat source unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] 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.

[0037] <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).

[0038] <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).

[0039] 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).

[0040] The water heat exchanger (15) is connected to a pipe (26) of the refrigerant circuit (2). The water heat exchanger (15) exchanges heat between the refrigerant flowing through the pipe (26) and the water flowing through a fluid pipe (17) of the fluid circuit (12). To exchange.

[0041] 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.

[0042] 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).

[0043] 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).

[0044] <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.

[0045] 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).

[0046] 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.

[0047] 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).

[0048] 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.

[0049] 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).

[0050] 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). This provides a refrigeration cycle Even if the compressor (30) vibrates during operation of the cooling device (1), the vibration is damped by the first vibration-isolating member (41) before being transmitted to the bottom plate (72).

[0051] 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).

[0052] 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.

[0053] 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).

[0054] 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.

[0055] <Double sound insulation structure> 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 room (S1). A plurality of gaps are provided along the periphery of the sound insulation member (60). Specifically, a gap is provided between the outer surfaces of the upper wall, front wall, rear wall, left wall, and right wall of the sound insulation member (60) and the inner surfaces of the upper panel (71), front panel (73), rear panel (74), partition member (28), and right panel (76) of the casing (70) that face each side wall of the sound insulation member (60).

[0056] Hereinafter, the shortest distance between the side wall of the sound insulation member (60) and the panel of the casing (70) facing the side wall of the sound insulation member (60) is referred to as the gap length L. In this embodiment, the gap length L is set to be not less than 5 mm and not more than 210 mm. Note that it is preferable to set the length L of at least one of the gaps to be not less than 5 mm and not more than 50 mm.

[0057] Fig. 4 is a graph showing the relationship between 1 / 3 octave band center frequency and transmission loss. Specifically, in sound insulation of noise, the mass law is generally followed. Fig. 4 compares the transmission loss when the casing (70) is made of a steel plate having a thickness of 0.8 mm and when the casing is made of a steel plate having a thickness of 1.6 mm.

[0058] As shown in FIG. 4, the transmission loss is greater for a plate thickness of 1.6 mm than for a plate thickness of 0.8 mm, demonstrating superior sound insulation performance.

[0059] Here, in order to improve the sound insulation performance while maintaining the same mass, we considered insulating the sound with two plates with a thickness of 0.8 mm, rather than using a single plate with a thickness of 1.6 mm.

[0060] 4, the casing (70) is made of a steel plate having a thickness of 0.8 mm, and the sound-proofing member (60) is made of a steel plate having a thickness of 0.8 mm. The transmission loss is compared when the length L of the gap between the outer surface of the sound-proofing member (60) and the inner surface of the casing (70) is changed.

[0061] Specifically, the relationship between the 1 / 3 octave band center frequency and the transmission loss was compared when the gap length L between the outer surface of the sound-proofing member (60) and the inner surface of the casing (70) was 5 mm, 10 mm, 25 mm, 50 mm, and 210 mm.

[0062] As shown in FIG. 4, it can be seen that, compared to the case where no sound-insulating member (60) is provided, i.e., where sound is insulated by a single plate, the case where a gap is provided between two plates, i.e., the casing (70) and the sound-insulating member (60), provides better sound insulation performance other than for low frequencies.

[0063] Here, in order to prevent contact between the sound insulation member (60) and the casing (70) due to vibration, the length L of the gap is preferably 5 mm or more.

[0064] In addition, the transmission loss when the gap length L is in the range of 5 mm to 210 mm is greater than the transmission loss when sound is blocked by a single plate material with a thickness of 1.6 mm in the frequency range of 1000 Hz to 5000 Hz, which is a frequency range that people find uncomfortable.

[0065] Furthermore, if the gap length L is set in the range of 5mm to 50mm, it is possible to achieve a distance that does not significantly decrease due to the coincidence effect in the 2500Hz band, which has the most positive correction (correction that makes noise louder) in the A-weighting correction, which is a frequency characteristic that imitates human hearing. This makes it possible to achieve both noise reduction and discomfort suppression.

[0066] Here, the coincidence effect is a phenomenon in which when a sound of a certain frequency is incident on a plate material, resonance occurs, causing a decrease in transmission loss near a specific frequency.

[0067] In addition, A-weighting is a frequency weighting characteristic used when measuring noise levels, as specified in "JIS C1509."

[0068] -Effects of embodiment 1- According to the features of the present embodiment, the double sound insulation structure of the sound insulation 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, by setting the length of the gap to be 5 mm or more and 210 mm or less, contact between the sound insulation member (60) and the casing (70) due to vibration can be prevented and the soundproofing effect can be improved.

[0069] According to the features of this embodiment, by setting the length of the gap to be equal to or greater than 5 mm and equal to or less than 50 mm, it is possible to prevent the soundproofing member (60) from coming into contact with the casing (70) due to vibration and to improve the soundproofing effect.

[0070] According to the features of the present embodiment, a refrigeration cycle apparatus (1) including a heat source unit (20) can be provided.

[0071] 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.

[0072] 5 and 6, 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).

[0073] -Effects of embodiment 2- According to the feature of this embodiment, the first sound-absorbing material (61) can suppress deterioration of sound insulation performance due to the low-frequency resonance transmission phenomenon, and can improve the soundproofing effect.

[0074] 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.

[0075] 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.

[0076] Third Embodiment 7, 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).

[0077] -Effects of embodiment 3- 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] Fourth Embodiment As shown in Fig. 8 and Fig. 9, 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. 8, the second support member (52) is a bottom plate (72) of the casing (70).

[0082] 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.

[0083] 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.

[0084] 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).

[0085] 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).

[0086] 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).

[0087] -Effects of embodiment 4- 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).

[0088] 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).

[0089] Fifth Embodiment 10 and 11, 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). The gaps are provided between the outer surfaces of the upper wall (85), front wall (86), rear wall (87), left wall (88), and right wall (89) of the sound insulation member (60) and the inner surfaces of the upper panel (71), front panel (73), rear panel (74), partition member (28), and right panel (76) of the casing (70), which face the respective side walls of the sound insulation member (60).

[0090] The upper wall (85) faces the upper panel (71) and forms the top surface of the sound insulation member (60). The front wall (86) faces the front panel (73) and forms the front surface of the sound insulation member (60). The rear wall (87) faces the rear panel (74) and forms the rear surface of the sound insulation member (60). The left side wall (88) faces the partition member (28) and forms the left surface of the sound insulation member (60). The right side wall (89) faces the right panel (76) and forms the right surface of the sound insulation member (60).

[0091] A part of the casing (70) has a first wall (81). The first wall (81) is detachable from the casing (70). Here, the direction of air flow caused by the outdoor fan (22) is defined as a first direction (front-to-back direction in FIG. 11), and the direction perpendicular to the first direction and the up-down direction is defined as a second direction (left-to-right direction in FIG. 11).

[0092] The first wall (81) includes a wall on the upper surface side of the casing (70), a wall on a first direction side, and a wall on a second direction side. In the example shown in Figures 10 and 11, the first wall (81) is provided on each of the upper panel (71), the front panel (73), and the right panel (76). In the example shown in Figure 10, the entire upper panel (71) constitutes the first wall (81) on the upper surface side of the casing (70).

[0093] The first wall portion (81) is attached to each panel of the casing (70) by bolts or the like (not shown). When the first wall portion (81) is removed from the casing (70), , the first maintenance opening (91) is opened.

[0094] A part of the sound insulation member (60) has a second wall portion (82). The second wall portion (82) is detachable from the sound insulation member (60) at a position corresponding to the first wall portion (81) of the casing (70).

[0095] The second wall portion (82) includes a wall portion on the upper surface side, a wall portion on the first direction side, and a wall portion on the second direction side of the sound insulation member (60). In the example shown in Figures 10 and 11, the second wall portion (82) is provided on each of the upper wall (85), the front wall (86), and the right side wall (89).

[0096] The second wall portion (82) is attached to each side wall of the sound insulation member (60) with bolts or the like (not shown). When the second wall portion (82) is removed from the sound insulation member (60), a second maintenance opening (92) appears in the sound insulation member (60).

[0097] As shown in FIG. 12, by removing the first wall portion (81) on the upper side of the casing (70) and the second wall portion (82) on the upper side of the sound insulation member (60), it is possible to access the storage space (65) of the sound insulation member (60) from above.

[0098] 13, the pipe group (8) can be seen from the second maintenance opening (92) on the upper surface side of the sound insulation member (60), thereby making it possible to perform maintenance on the pipe group (8).

[0099] 14, by removing the first wall portion (81) on the front side of the casing (70) and the second wall portion (82) on the front side of the sound insulation member (60), the storage space (65) of the sound insulation member (60) can be accessed from the front side. By removing the first wall portion (81) on the right side of the casing (70) and the second wall portion (82) on the right side of the sound insulation member (60), the storage space (65) of the sound insulation member (60) can be accessed from the right side.

[0100] 15, the compressor (30) and the refrigerant cylinder (5) can be seen through the second maintenance opening (92) on the front side of the sound insulation member (60). This allows maintenance of the compressor (30) and refrigerant filling with the refrigerant cylinder (5) to be performed.

[0101] As shown in Fig. 16, the water heat exchanger (15) can be seen from the second maintenance opening (92) on the right side of the sound insulation member (60), which allows maintenance of the water heat exchanger (15).

[0102] -Effects of the fifth embodiment- In the case of a heat source unit, the panel of the housing may be removed to perform maintenance inside the machine room. If the compressor is covered with a soundproofing material, the soundproofing material must be removed from the machine room in order to access the compressor, which makes maintenance difficult. In contrast, the present embodiment provides easy access to the interior of the soundproofing material's storage space.

[0103] According to the features of the present embodiment, the double sound insulation structure of the sound insulation member (60) and the casing (70) can prevent radiated sound and vibration sound from the compressor (30) from leaking to the outside. In addition, by removing the first wall portion (81) of the casing (70) and the second wall portion (82) of the sound insulation member (60), the interior of the accommodation space (65) of the sound insulation member (60) can be easily accessed, improving maintainability.

[0104] According to the feature of this embodiment, the inside of the accommodation space (65) of the sound insulation member (60) can be accessed from above by removing the first wall portion (81) and the second wall portion (82) from above.

[0105] According to the feature of the present embodiment, by removing the first wall portion (81) and the second wall portion (82) from the first direction side, the interior of the accommodation space (65) of the sound insulation member (60) can be accessed from the first direction side.

[0106] According to the feature of the present embodiment, by removing the first wall portion (81) and the second wall portion (82) from the second direction side, the interior of the accommodation space (65) of the sound insulation member (60) can be accessed from the second direction side.

[0107] According to the features of the present embodiment, a refrigeration cycle apparatus (1) including a heat source unit (20) can be provided.

[0108] Sixth 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.

[0109] 17 and 18, 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 surfaces of the upper wall (85), the front wall (86), the rear wall (87), the left wall (88), and the right wall (89) of the sound insulation member (60).

[0110] 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 (85), front wall (86), rear wall (87), left wall (88), and right wall (89) of the sound insulation member (60).

[0111] 19 and 20, a part of the casing (70) has a first wall portion (81). The first wall portion (81) is detachable from the casing (70). The first wall portion (81) is provided on each of the upper panel (71), the front panel (73), and the right panel (76).

[0112] The first sound absorbing material (61) is attached to the inner surface of a first wall portion (81) of the casing (70). When the first wall portion (81) is removed from the casing (70), the first sound absorbing material (61) is removed together with the first wall portion (81), and a first maintenance opening (91) is opened in the casing (70).

[0113] A part of the sound insulation member (60) has a second wall portion (82). The second wall portion (82) is detachable from the sound insulation member (60) at a position corresponding to the first wall portion (81) of the casing (70). The second wall portion (82) is provided on each of the upper wall (85), the front wall (86), and the right side wall (89).

[0114] The second sound absorbing material (62) is attached to the inner surface of the second wall portion (82) of the sound insulating member (60). When the second wall portion (82) is removed from the sound insulating member (60), the second sound absorbing material (62) is removed together with the second wall portion (82), and a second maintenance opening (92) is formed in the sound insulating member (60).

[0115] -Effects of embodiment 6- According to the feature of this embodiment, the first sound-absorbing material (61) can suppress deterioration of sound insulation performance due to the low-frequency resonance transmission phenomenon, and can improve the soundproofing effect.

[0116] Specifically, when two plates form a double structure with a hollow space between them, the two plates have two masses. The air in the hollow layer acts as a spring connecting them and vibrates, causing 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.

[0117] 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.

[0118] 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.

[0119] Specifically, when the compressor (30) and the accumulator (25), which are sound sources, are enclosed in a hermetically sealed box-shaped sound-proofing member (60), a phenomenon known as build-up occurs, in which the sound pressure level around the compressor (30) and the accumulator (25) increases as compared to when the sound-proofing member (60) is not present, due to the reflection of sound by the sound-proofing member (60).

[0120] 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.

[0121] 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.

[0122] According to a feature of the present embodiment, the first sound absorbing material (61) can be removed together with the first wall portion (81) of the casing (70).

[0123] According to a feature of the present embodiment, the second sound absorbing material (62) can be removed together with the second wall portion (82) of the sound insulating member (60).

[0124] Seventh Embodiment As shown in Fig. 21 and Fig. 22, 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. 21, the second support member (52) is a bottom plate (72) of the casing (70).

[0125] 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.

[0126] 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.

[0127] 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).

[0128] 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).

[0129] 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).

[0130] A part of the casing (70) has a first wall portion (81). The first wall portion (81) is detachable from the casing (70). The first wall portion (81) is provided on each of the upper panel (71), the front panel (73), and the right panel (76).

[0131] The first sound absorbing material (61) is attached to the inner surface of a first wall portion (81) of the casing (70). When the first wall portion (81) is removed from the casing (70), the first sound absorbing material (61) is removed together with the first wall portion (81), and a first maintenance opening (91) is opened in the casing (70).

[0132] A part of the sound insulation member (60) has a second wall portion (82). The second wall portion (82) is detachable from the sound insulation member (60) at a position corresponding to the first wall portion (81) of the casing (70). The second wall portion (82) is provided on each of the upper wall (85), the front wall (86), and the right side wall (89).

[0133] The second sound absorbing material (62) is attached to the inner surface of the second wall portion (82) of the sound insulating member (60). When the second wall portion (82) is removed from the sound insulating member (60), the second sound absorbing material (62) is removed together with the second wall portion (82), and a second maintenance opening (92) is formed in the sound insulating member (60).

[0134] -Effects of embodiment 7- 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).

[0135] 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).

[0136] According to the features of the present embodiment, the first sound absorbing material (61) can be removed together with the first wall portion (81) of the casing (70). Furthermore, the second sound absorbing material (62) can be removed together with the second wall portion (82) of the sound insulation member (60).

[0137] 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.

[0138] 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 using a refrigerant. The utilization unit may be an air conditioning unit that conditions the air in a target space. In this case, the air conditioning unit may be a ceiling-mounted or wall-mounted type. The utilization unit may be a refrigeration unit for cooling the air inside the unit. The refrigeration unit may cool the interior of a shipping container for sea or land use.

[0139] The heat source unit (20) does not necessarily have to be installed outdoors, and 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.

[0140] 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]

[0141] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for a heat source unit and a refrigeration cycle apparatus. [Explanation of symbols]

[0142] 1 Refrigeration cycle equipment 20 Outdoor unit (heat source unit) 22 Outdoor fan (fan) 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 81 1st wall 82 Second wall section S1 Machine room (internal space) S2 Blower room

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 gap is provided between an outer surface of the sound insulation member (60) and an inner surface of the casing (70); The length of the gap, which is the shortest distance between the outer surface of the sound insulation member (60) and the inner surface of the casing (70) facing the outer surface of the sound insulation member (60), is 5 mm or more and 210 mm or less. Heat source unit.

2. In the heat source unit of claim 1, The gap is provided in plurality along the periphery of the sound insulation member (60), At least one of the gaps has a length of 5 mm or more and 50 mm or less. Heat source unit.

3. In the heat source unit according to claim 1 or 2, a portion of the casing (70) having a first wall portion (81) detachable from the casing (70); A part of the sound insulation member (60) has a second wall portion (82) detachable from the sound insulation member (60) at a position corresponding to the first wall portion (81) of the casing (70). Heat source unit.

4. In the heat source unit of claim 3, the first wall portion (81) includes an upper wall portion of the casing (70), The second wall portion (82) includes an upper wall portion of the sound insulation member (60). Heat source unit.

5. In the heat source unit of claim 3, A blower chamber (S2) is provided inside the casing (70), a fan (22) disposed in the blower chamber (S2), a direction of air flow caused by the fan (22) is a first direction, the first wall portion (81) includes a wall portion of the casing (70) on the first direction side, The second wall portion (82) includes a wall portion of the sound insulation member (60) on the first direction side. Heat source unit.

6. In the heat source unit of claim 3, A blower chamber (S2) is provided inside the casing (70), a fan (22) disposed in the blower chamber (S2), a direction in which air is circulated by the fan (22) is a first direction, and a direction perpendicular to the first direction and the vertical direction is a second direction, the first wall portion (81) includes a wall portion of the casing (70) on the second direction side, The second wall portion (82) includes a wall portion of the sound insulation member (60) on the second direction side. Heat source unit.

7. In the heat source unit of claim 3, 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.

8. In the heat source unit of claim 3, A second sound absorbing material (62) is provided on the inner surface of the sound insulating member (60). Heat source unit.

9. The heat source unit according to claim 8, 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.

10. The heat source unit according to claim 7, The first sound absorbing material (61) is attached to the inner surface of the first wall portion (81) of the casing (70). Heat source unit.

11. The heat source unit according to claim 8, The second sound absorbing material (62) is attached to the inner surface of the second wall portion (82) of the sound insulation member (60). Heat source unit.

12. The heat source unit according to claim 9, the first sound-absorbing material (61) is attached to an inner surface of the first wall portion (81) of the casing (70), The second sound absorbing material (62) is attached to the inner surface of the second wall portion (82) of the sound insulation member (60). Heat source unit.

13. 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.

14. The heat source unit (20) according to any one of claims 1 and 2 is provided. Refrigeration cycle equipment.

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