Heat source unit

Abstract

To facilitate arrangement of a refrigerant pipe.SOLUTION: A heat source unit (1) comprises a support member (50) that extends along a first direction above a bottom surface (45a) of a first chamber (S1) and supports refrigerant pipes (RP) connecting compressors (11A, 11B, 11C, 11D) and water heat exchangers (31, 32), as supported pipes (SP1, SP2, SP3).SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] This disclosure relates to a heat source unit.

Background Art

[0002] Heat source units for generating cold water or hot water are known.

[0003] The heat source unit of Patent Document 1 has a refrigerant circuit that performs a refrigeration cycle and a water heat exchanger that exchanges heat between the refrigerant of the refrigerant circuit and water. Each device such as a compressor connected to the refrigerant circuit and the water heat exchanger are housed in a machine room formed at the lower part of the casing.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the heat source unit described in Patent Document 1, the refrigerant piping of the refrigerant circuit is installed on the bottom surface of the machine room. On the other hand, since each device such as a compressor is arranged in the machine room, these devices and the refrigerant piping interfere with each other. As a result, it becomes difficult to arrange the refrigerant piping.

[0006] This disclosure is to facilitate the arrangement of the refrigerant piping.

Means for Solving the Problems

[0007] The first embodiment relates to a heat source unit. The heat source unit comprises a refrigerant circuit (10) having compressors (11A, 11B, 11C, 11D) and air heat exchangers (12A, 12B, 12C, 12D), a first chamber (S1) in which the compressors (11A, 11B, 11C, 11D) are arranged, a second chamber (S2) located above the first chamber (S1) in which the air heat exchangers (12A, 12B, 12C, 12D) are arranged, a casing (40) extending in a first direction along the horizontal, water heat exchangers (31, 32) arranged in line with the compressors (11A, 11B, 11C, 11D) along the first direction to exchange heat between the refrigerant in the refrigerant circuit (10) and water, and the bottom surface of the first chamber (S1) 44 The device includes a support member (50) that extends along a first direction above the compressor (11A, 11B, 11C, 11D) and a support member (50) that supports the refrigerant piping (RP) connecting the compressor (11A, 11B, 11C, 11D) and the water heat exchanger (31, 32) as supported piping (SP1, SP2, SP3).

[0008] Furthermore, the phrase "along the direction of ~" as used here includes not only directions parallel to the "direction of ~" but also directions that do not deviate sharply from the "direction of ~". Specifically, it means directions that form an angle less than 45 degrees with respect to the "direction of ~". Therefore, for example, the phrase "a heat exchanger arranged to be aligned with the compressor along the first direction" means not only that the compressor and the heat exchanger are aligned in the first direction, but also that the compressor and the heat exchanger are aligned in directions that form an angle less than 45 degrees with respect to the first direction. The meaning of the phrase "along the direction of ~" in other parts of this specification is the same.

[0009] In the first embodiment, the bottom surface of the first chamber (S1) 44 A support member (50) is provided above the casing (40). The support member (50) extends along the longitudinal direction (first direction) of the casing (40) and supports the supported pipes (SP1, SP2, SP3) of the refrigerant piping (RP) on the support member (50). As a result, interference between the equipment installed in the first chamber (S1) and the refrigerant piping (RP) can be suppressed, and the arrangement of the refrigerant piping (RP) becomes easier.

[0010] In a second embodiment, the casing (40) has a plurality of frames, including a first frame (FR1) extending in a first direction. The support member (50) is the first frame (FR1).

[0011] In the second embodiment, the first frame (FR1), which is the frame of the casing (40), also serves as a support member (50) that supports the refrigerant piping (RP).

[0012] A third aspect is the casing (40) in the second aspect, wherein the casing (40) has a first side plate (80) which forms part of the side surface of the casing (40) along the first direction and is detachably attached to the casing (40). The first frame (FR1) is located inside the first side plate (80).

[0013] In the third embodiment, the worker can easily access the supported pipes (SP1, SP2, SP3) by removing the first side plate (80) of the casing (40).

[0014] The fourth aspect is the third aspect, in which the first frame (FR1) is concave when viewed in a cross section perpendicular to the first direction, opening toward the first side plate (80). The supported pipes (SP1, SP2, SP3) are arranged inside the support member (50).

[0015] In the fourth embodiment, the first frame (FR1) is formed in a concave shape, thereby increasing the strength of the first frame (FR1). By removing the first side plate (80), the worker can easily access the supported pipes (SP1, SP2, SP3) inside the first frame (FR1).

[0016] The fifth embodiment is one of the first to fourth embodiments in which the supported piping (SP1, SP2, SP3) is a liquid pipe through which the liquid refrigerant of the refrigerant circuit (10) flows.

[0017] In the fifth embodiment, the arrangement of the supported piping, the liquid pipe (21), becomes easier. The liquid pipe (21) has a smaller diameter and less rigidity than the gas pipe. Therefore, the clearance required between the liquid pipe (21) and each piece of equipment is larger than the clearance required between the gas pipe and each piece of equipment. By supporting the liquid pipe (21) with a support member (50), the clearance between the liquid pipe (21) and each piece of equipment can be secured. As a result, the degree of freedom in the layout of these pieces of equipment is improved.

[0018] In the sixth embodiment, in any one of the first to fifth embodiments, the support member (50) is positioned below the bottom surface (45a) of the second chamber (S2).

[0019] In the sixth embodiment, the supported piping (SP1, SP2, SP3) is not positioned too high. The length of the refrigerant piping (RP) can be shortened, and the arrangement of the refrigerant piping (RP) becomes easier.

[0020] The seventh embodiment, in any one of the first to sixth embodiments, includes a refrigerant circuit (10) comprising a first refrigerant circuit (10A) having a first compressor (11A) and a first air heat exchanger (12A), and a second refrigerant circuit (10B) having a second compressor (11B) and a second air heat exchanger (12B). The supported piping (SP1, SP2, SP3) includes a first supported piping (SP1) which is the supported piping of the first refrigerant circuit (10A), and a second supported piping (SP2) which is the supported piping of the second refrigerant circuit (10B). The support member (50) supports the first supported piping (SP1) and the second supported piping (SP2).

[0021] In the seventh embodiment, the support member (50) supports the first supported piping (SP1) corresponding to the first compressor (11A) and the second supported piping (SP2) corresponding to the second compressor (11B). As a result, the support structure for the refrigerant piping (RP) can be simplified.

[0022] In the eighth aspect, as in the seventh aspect, the first supported pipe (SP1) and the second supported pipe (SP2) are arranged side by side in a second direction that is perpendicular to the first direction and along the horizontal direction.

[0023] In the eighth aspect, since the first supported pipe (SP1) and the second supported pipe (SP2) are arranged side by side in the horizontal direction, the height of the casing (40) can be reduced.

[0024] The ninth aspect further includes a holding member (90) that holds both the first supported pipe (SP1) and the second supported pipe (SP2) with a predetermined interval in the seventh or eighth aspect.

[0025] In the ninth aspect, the holding member (90) can prevent the first supported pipe (SP1) and the second supported pipe (SP2) from coming into contact with each other.

Brief Description of the Drawings

[0026] [Figure 1] FIG. 1 is a piping system diagram of the heat source unit of the embodiment. [Figure 2] FIG. 2 is a perspective view showing the appearance of the heat source unit. [Figure 3] FIG. 3 is a front view of the heat source unit. [Figure 4] FIG. 4 is a rear view of the heat source unit. [Figure 5] FIG. 5 is a left side view of the heat source unit. [Figure 6] FIG. 6 is a cross-sectional view taken along line A-A of FIG. 3. [Figure 7] FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5. [Figure 8] FIG. 8 is an enlarged view of the region C in FIG. 7. <​​​​​​​​​​​​The embodiments of this disclosure will be described in detail below with reference to the drawings. However, this disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of ​​this disclosure. Since the drawings are for conceptual explanation of this disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.

[0028] (1) Overview The heat source unit (1) according to this embodiment is used as a heat source for an air conditioning system. The air conditioning system provides air conditioning for offices, shopping malls, factories, etc. The heat source unit (1) is a chilling unit dedicated to cooling that generates chilled water. The heat source unit (1) is an air-cooled chilling unit.

[0029] (2) Configuration of the refrigerant circuit The heat source unit (1) of this embodiment has a plurality of refrigerant circuits (10). As shown in Figure 1, the heat source unit (1) of this example has a first refrigerant circuit (10A), a second refrigerant circuit (10B), a third refrigerant circuit (10C), and a fourth refrigerant circuit (10D). The number of refrigerant circuits (10) is merely an example and may be one, two, three, or five or more. The basic configuration of the first refrigerant circuit (10A), the second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D) is the same. In Figure 1, for convenience, the details of the third refrigerant circuit (10C) and the fourth refrigerant circuit (10D) are omitted. Each refrigerant circuit (10) is filled with refrigerant. Each refrigerant circuit (10) performs a vapor compression type refrigeration cycle by circulating the refrigerant.

[0030] The first refrigerant circuit (10A) mainly comprises a first compressor (11A), a first air heat exchanger (12A), and a first expansion valve (13A). The first refrigerant circuit (10A) also comprises a first subcooling heat exchanger (14A) and a first accumulator (15A).

[0031] The first compressor (11A) compresses the inhaled refrigerant and discharges the compressed refrigerant. The first compressor (11A) is, for example, a scroll compressor, but may be other types of compressors such as screw, turbo, or rotary compressors. The first air heat exchanger (12A) is an outdoor heat exchanger that exchanges heat between the refrigerant and the outdoor air. The first air heat exchanger (12A) is a fin-and-tube type heat exchanger. In this example, the first air heat exchanger (12A) functions only as a heat exchanger (condenser) that releases heat from the refrigerant. The first expansion valve (13A) reduces the pressure of the refrigerant after condensation. The first expansion valve (13A) is, for example, an electronic expansion valve. The first subcooling heat exchanger (14A) cools the refrigerant after heat release and increases the degree of subcooling of the refrigerant. The first subcooling heat exchanger (14A) exchanges heat between the refrigerant in the first liquid channel (L1) and the refrigerant in the second liquid channel (L2).

[0032] The refrigerant circuit (10) comprises a discharge pipe (20), a liquid pipe (21), an injection pipe (22), a gas pipe (23), and an intake pipe (24) as elements constituting the refrigerant piping. The discharge pipe (20) connects the discharge side of the first compressor (11A) to the gas end of the first air heat exchanger (12A). The liquid pipe (21) connects the gas end of the first air heat exchanger (12A) to the inlet end of the first refrigerant flow path (R1) of the first water heat exchanger (31). One end of the injection pipe (22) is connected to the upstream portion of the first subcooled heat exchanger (14A) in the liquid pipe (21). The other end of the injection pipe (22) is connected to the intermediate pressure section (during compression) of the first compressor (11A). A cooling expansion valve (25) is provided in the injection pipe (22) on the upstream side of the first subcooled heat exchanger (14A). The gas pipe (23) connects the outlet end of the first refrigerant flow path (R1) of the first water heat exchanger (31) to the first accumulator (15A). The suction pipe (24) connects the first accumulator (15A) to the suction side of the first compressor (11A).

[0033] The elements of the second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D) are basically the same as those of the first refrigerant circuit (10A).

[0034] The second refrigerant circuit (10B) mainly comprises a second compressor (11B), a second air heat exchanger (12B), and a second expansion valve (13B). The second refrigerant circuit (10B) also comprises a second subcooling heat exchanger (14B) and a second accumulator (15B). The liquid pipe (21) of the second refrigerant circuit (10B) connects the gas end of the second air heat exchanger (12B) to the inlet end of the second refrigerant flow path (R2) of the first water heat exchanger (31). The gas pipe (23) of the second refrigerant circuit (10B) connects the outlet end of the second refrigerant flow path (R2) of the first water heat exchanger (31) to the second accumulator (15B).

[0035] The third refrigerant circuit (10C) mainly comprises a third compressor (11C), a third air heat exchanger (12C), and a third expansion valve (13C). The third refrigerant circuit (10C) also comprises a third subcooling heat exchanger (14C) and a third accumulator (15C). The liquid pipe (21) of the third refrigerant circuit (10C) connects the gas end of the third air heat exchanger (12C) to the inlet end of the third refrigerant flow path (R3) of the second water heat exchanger (32). The gas pipe (23) of the third refrigerant circuit (10C) connects the outlet end of the third refrigerant flow path (R3) of the second water heat exchanger (32) to the third accumulator (15C).

[0036] The fourth refrigerant circuit (10D) mainly comprises a fourth compressor (11D), a fourth air heat exchanger (12D), and a fourth expansion valve (13D). The fourth refrigerant circuit (10D) also comprises a fourth subcooling heat exchanger (14D) and a fourth accumulator (15D). The liquid pipe (21) of the fourth refrigerant circuit (10D) connects the gas end of the fourth air heat exchanger (12D) to the inlet end of the fourth refrigerant flow path (R4) of the second water heat exchanger (32). The gas pipe (23) of the fourth refrigerant circuit (10D) connects the outlet end of the fourth refrigerant flow path (R4) of the second water heat exchanger (32) to the fourth accumulator (15D). (3) Water circuit As shown in Figure 1, the heat source unit (1) has a water circuit (30) through which water flows. A pump (33), a first water heat exchanger (31), and a second water heat exchanger (32) are connected to the water circuit (30) in order from the upstream side to the downstream side of the water flow. The pump (33) transports the water in the water circuit (30). The first water heat exchanger (31) and the second water heat exchanger (32) are, for example, plate-type heat exchangers. The first water heat exchanger (31) and the second water heat exchanger (32) exchange heat between the refrigerant and the water. The first water heat exchanger (31) and the second water heat exchanger (32) are counter-flow type heat exchangers.

[0037] The first water heat exchanger (31) has a first water channel (W1), a first refrigerant channel (R1), and a second refrigerant channel (R2). The first water channel (W1) is connected to the water circuit (30), the first refrigerant channel (R1) is connected to the first refrigerant circuit (10A), and the second refrigerant channel (R2) is connected to the second refrigerant circuit (10B). The first water heat exchanger (31) exchanges heat between the water in the first water channel (W1) and the refrigerant in the first refrigerant circuit (10A). The first water heat exchanger (31) exchanges heat between the water in the first water channel (W1) and the refrigerant in the second refrigerant circuit (10B).

[0038] The second water heat exchanger (32) has a second water channel (W2), a third refrigerant channel (R3), and a fourth refrigerant channel (R4). The second water channel (W2) is connected to the water circuit (30), the third refrigerant channel (R3) is connected to the third refrigerant circuit (10C), and the fourth refrigerant channel (R4) is connected to the fourth refrigerant circuit (10D). The second water heat exchanger (32) exchanges heat between the water in the second water channel (W2) and the refrigerant in the third refrigerant circuit (10C). The second water heat exchanger (32) exchanges heat between the water in the second water channel (W2) and the refrigerant in the fourth refrigerant circuit (10D).

[0039] (4) Structure of the heat source unit The detailed configuration of the heat source unit (1) will be explained with reference to Figures 2 to 7. In the following explanation, the terms "front," "back," "right," "left," "up," and "down" refer to the directions indicated by the arrows in Figure 2. In the following explanation, the first direction corresponds to the horizontal left-right direction, the second direction corresponds to the horizontal front-back direction, and the third direction corresponds to the vertical up-down direction.

[0040] (4-1) Casing The heat source unit (1) has a hollow casing (40). The casing (40) is formed to be horizontally elongated, with its length in the left-right direction (first direction) being greater than its length in the front-back direction (second direction). As shown in Figure 5, when viewed from the first direction, the casing (40) has a shape in which the width of its upper part in the front-back direction is widened.

[0041] The casing (40) has a lower housing portion (41) and an upper housing portion (42). The lower housing portion (41) includes the lower end of the casing (40). The upper housing portion (42) includes the upper end of the casing (40) and is located above the lower housing portion (41). A first chamber, the machine room (S1), is formed inside the lower housing portion (41). A second chamber, the blower room (S2), is formed inside the upper housing portion (42). The lower housing portion (41) has a main body portion (41a) having a rectangular parallelepiped shape and an extension portion (41b) extending outward in the first direction (to the right) from the right end of the main body portion (41a).

[0042] The casing (40) has a plurality of frames and a plurality of outer panels that are detachably attached to the plurality of frames. The plurality of frames are a framework for fixing the outer panels of the casing (40). The plurality of frames constitute columns or beams. The plurality of frames function as reinforcing members that reinforce the casing (40). The outer panels shield the inside and outside of the casing (40). The frames and outer panels are made of metal materials such as iron or aluminum.

[0043] As shown in Figures 2 to 4, the lower housing (41) has a frame consisting of a first transverse frame (Fa1), a second transverse frame (Fa2), a third transverse frame (Fa3), and a fourth transverse frame (Fa4). These transverse frames are formed in the shape of elongated plates extending in a first direction. In other words, the first direction is the longitudinal direction of these transverse frames. The first transverse frame (Fa1) is located at the lower end of the front surface of the lower housing (41). The second transverse frame (Fa2) is located at the upper end of the front surface of the lower housing (41). The third transverse frame (Fa3) is located at the lower end of the rear surface of the lower housing (41). The fourth transverse frame (Fa4) is located at the upper end of the rear surface of the lower housing (41).

[0044] The lower housing (41) has a frame consisting of a plurality of first vertical frames (Fb1) and a plurality of second vertical frames (Fb2). These vertical frames are formed in the shape of long plates extending in a third direction which is the vertical direction. In other words, these vertical frames have the third direction as their longitudinal direction. The first vertical frames (Fb1) are located on the front surface of the casing (40) and are formed extending from the first horizontal frame (Fa1) to the second horizontal frame (Fa2). The second vertical frames (Fb2) are located on the rear surface of the casing (40) and are formed extending from the first horizontal frame (Fa1) to the second horizontal frame (Fa2).

[0045] The lower housing section (41) has a plurality of lower front plates (P1) and a plurality of lower rear plates (P2) as outer plates. The lower front plates (P1) and lower rear plates (P2) are formed in the shape of rectangular plates. The lower front plates (P1) are located on the front surface of the lower housing section (41). The lower front plates (P1) are detachably attached to the first horizontal frame (Fa1), the second horizontal frame (Fa2), and the first vertical frame (Fb1). The lower rear plates (P2) are located on the rear surface of the lower housing section (41). The lower rear plates (P2) are detachably attached to the third horizontal frame (Fa3), the fourth horizontal frame (Fa4), and the second vertical frame (Fb2).

[0046] The upper housing (42) has a frame consisting of a fifth transverse frame (Fa5), a sixth transverse frame (Fa6), a seventh transverse frame (Fa7), and an eighth transverse frame (Fa8). These transverse frames are formed in the shape of elongated plates extending in a first direction. In other words, the first direction is the longitudinal direction of these transverse frames. The fifth transverse frame (Fa5) is located at the lower end of the front surface of the upper housing (42). The sixth transverse frame (Fa6) is located near the upper end of the front surface of the upper housing (42). The seventh transverse frame (Fa7) is located at the lower end of the rear surface of the upper housing (42). The eighth transverse frame (Fa8) is located near the upper end of the rear surface of the upper housing (42).

[0047] The upper housing section (42) has a frame consisting of a first intermediate vertical frame (Fc1), a second intermediate vertical frame (Fc2), a third intermediate vertical frame (Fc3), a fourth intermediate vertical frame (Fc4), a fifth intermediate vertical frame (Fc5), a sixth intermediate vertical frame (Fc6), a seventh intermediate vertical frame (Fc7), and an eighth intermediate vertical frame (Fc8).

[0048] The first intermediate vertical frame (Fc1) is located at the left end of the front of the upper housing (42), and the second intermediate vertical frame (Fc2) is located at the right end of the front of the upper housing (42). The third intermediate vertical frame (Fc3) and the fourth intermediate vertical frame (Fc4) are located in the middle of the front of the upper housing (42) in the left-right direction. The third intermediate vertical frame (Fc3) is closer to the left end of the upper housing (42) than the fourth intermediate vertical frame (Fc4). The first intermediate vertical frame (Fc1), second intermediate vertical frame (Fc2), third intermediate vertical frame (Fc3), and fourth intermediate vertical frame (Fc4) are inclined to move towards the front as they are positioned upwards. In other words, the first intermediate vertical frame (Fc1), second intermediate vertical frame (Fc2), third intermediate vertical frame (Fc3), and fourth intermediate vertical frame (Fc4) are inclined to face diagonally downwards.

[0049] The fifth intermediate vertical frame (Fc5) is located at the left end of the rear surface of the upper housing (42), and the sixth intermediate vertical frame (Fc6) is located at the right end of the rear surface of the upper housing (42). The seventh intermediate vertical frame (Fc7) and the eighth intermediate vertical frame (Fc8) are located in the middle of the rear surface of the upper housing (42) in the left-right direction. The seventh intermediate vertical frame (Fc7) is closer to the left end of the upper housing (42) than the eighth intermediate vertical frame (Fc8). The fifth intermediate vertical frame (Fc5), sixth intermediate vertical frame (Fc6), seventh intermediate vertical frame (Fc7), and eighth intermediate vertical frame (Fc8) are inclined to move towards the rear as they are positioned upwards. In other words, the fifth intermediate vertical frame (Fc5), sixth intermediate vertical frame (Fc6), seventh intermediate vertical frame (Fc7), and eighth intermediate vertical frame (Fc8) are inclined to face diagonally downwards.

[0050] In the upper housing section (42), a first suction port (I1) is formed between the fifth horizontal frame (Fa5), the sixth horizontal frame (Fa6), the first intermediate vertical frame (Fc1), and the third intermediate vertical frame (Fc3). A second suction port (I2) is formed between the fifth horizontal frame (Fa5), the sixth horizontal frame (Fa6), the fourth intermediate vertical frame (Fc4), and the second intermediate vertical frame (Fc2). In the upper housing section (42), a third suction port (I3) is formed between the sixth horizontal frame (Fa6), the seventh horizontal frame (Fa7), the fifth intermediate vertical frame (Fc5), and the seventh intermediate vertical frame (Fc7). A fourth suction port (I4) is formed between the sixth horizontal frame (Fa6), the seventh horizontal frame (Fa7), the eighth intermediate vertical frame (Fc8), and the sixth intermediate vertical frame (Fc6).

[0051] As shown in Figure 6, the casing (40) has a first reinforcing frame (FR1) and a second reinforcing frame (FR2). These reinforcing frames (FR1, FR2) are located at the connection between the lower housing section (41) and the upper housing section (42). These reinforcing frames extend along the left-right direction (first direction). In other words, the first direction is the longitudinal direction of these reinforcing frames. The first reinforcing frame (FR1) is located on the front side of the casing (40). The first reinforcing frame (FR1) extends from the left end to the right end of the upper housing section (42). The second reinforcing frame (FR2) is located on the rear side of the casing (40). The second reinforcing frame (FR2) extends from the left end to the right end of the upper housing section (42). Details of the first reinforcing frame (FR1) will be described later.

[0052] As shown in Figures 2 to 4, the casing (40) has a top plate (43) that forms its upper surface. The top plate (43) is formed in the shape of a rectangular plate. Multiple air outlets are formed in the top plate (43). Each air outlet is formed in the shape of a circle. The multiple air outlets are arranged in a line in the first direction. In this example, the top plate (43) has a first air outlet (O1), a second air outlet (O2), a third air outlet (O3), and a fourth air outlet (O4) formed in order from its left end to its right end.

[0053] As shown in Figure 6, the casing (40) has a bottom plate (44) that forms its lower surface. The bottom plate (44) is formed in the shape of a rectangular plate. The bottom plate (44) forms the bottom surface of the machine room (S1).

[0054] An intermediate plate (45) is formed inside the casing (40). The intermediate plate (45) is formed in the shape of a rectangular plate. The intermediate plate (45) divides the internal space of the casing (40) vertically. The space below the intermediate plate (45) is the machine room (S1), and the space above the intermediate plate (45) is the blower room (S2). The intermediate plate (45) forms the bottom surface of the blower room (S2).

[0055] As shown in Figures 3 and 4, a partition plate (46) is provided inside the upper housing (42). The partition plate (46) constitutes a vertical wall extending in the third direction. The partition plate (46) divides the internal space of the upper housing (42) into left and right sections. The space to the left of the partition plate (46) is the first blower room (S2A), which serves as a blower room, and the space to the right of the partition plate (46) is the second blower room (S2B), which serves as a blower room. The first blower room (S2A) is in communication with the first intake port (I1), the third intake port (I3), the first outlet port (O1), and the second outlet port (O2). The second blower room (S2B) is connected to the second intake port (I2), the fourth intake port (I4), the third outlet port (O3), and the fourth outlet port (O4).

[0056] (4-2) Configuration of each piece of equipment in the fan room As shown in Figures 2 to 4, the fan room (S2) is equipped with air heat exchangers (12A, 12B, 12C, 12D). Specifically, the first fan room (S2A) is equipped with the first air heat exchanger (12A) and the third air heat exchanger (12C), while the second fan room (S2B) is equipped with the second air heat exchanger (12B) and the fourth air heat exchanger (12D). The first air heat exchanger (12A) is located behind the first intake port (I1), the second air heat exchanger (12B) is located behind the second intake port (I2), the third air heat exchanger (12C) is located behind the third intake port (I3), and the fourth air heat exchanger (12D) is located behind the fourth intake port (I4). The heat transfer tubes of the air heat exchangers (12A, 12B, 12C, 12D) extend along the first direction. As shown in Figure 6, the air heat exchangers (12A, 12B, 12C, 12D) are inclined so that they move towards the outward direction of the short side of the casing (40) as they move upward.

[0057] As shown in Figure 2, the first fan (5A), second fan (5B), third fan (5C), and fourth fan (5D) are arranged in the upper space of the blower room (S2). The first fan (5A) is located below the first outlet (O1), the second fan (5B) below the second outlet (O2), the third fan (5C) below the third outlet (O3), and the fourth fan (5D) below the fourth outlet (O4). These fans are propeller fans.

[0058] (4-3) Configuration of each piece of equipment in the machine room As shown in Figure 7, the machine room (S1) is arranged in order from left to right as follows: the first unit (U1), the second unit (U2), the third unit (U3), and the fourth unit (U4). The first unit (U1) includes the components of the first refrigerant circuit (10A) and the first electrical component box (6A) for controlling each component. The components of the first refrigerant circuit (10A) include the first compressor (11A), the first accumulator (15A), and the first subcooling heat exchanger (14A). Similarly, the second unit (U2) includes a second compressor (11B), a second accumulator (15B), a second subcooled heat exchanger (14B), and a second electrical component box (6B); the third unit (U3) includes a third compressor (11C), a third accumulator (15C), a third subcooled heat exchanger (14C), and a third electrical component box (6C); and the fourth unit (U4) includes a fourth compressor (11D), a fourth accumulator (15D), a fourth subcooled heat exchanger (14D), and a fourth electrical component box (6D).

[0059] The first compressor (11A), the second compressor (11B), the third compressor (11C), and the fourth compressor (11D) are arranged side by side in the first direction. These compressors (11A, 11B, 11C, 11D) are located towards the front of the casing (40). The first accumulator (15A), the second accumulator (15B), the third accumulator (15C), and the fourth accumulator (15D) are arranged side by side in the first direction. These accumulators are located in the middle of the casing (40) in the second direction. The first supercooling heat exchanger (14A), the second supercooling heat exchanger (14B), the third supercooling heat exchanger (14C), and the fourth supercooling heat exchanger (14D) are arranged side by side in the first direction. These supercooling heat exchangers are located towards the front of the casing (40). Each electrical component box houses an inverter device for adjusting the rotational speed of the corresponding compressor (11A, 11B, 11C, 11D). These electrical component boxes are arranged in a line in the first direction. These electrical component boxes are located towards the rear of the casing (40).

[0060] The machine room (S1) contains a first water heat exchanger (31), a second water heat exchanger (32), and a pump (33). The first water heat exchanger (31), the second water heat exchanger (32), and the pump (33) are positioned towards the other end (right end) in the first direction of the machine room (S1). The first water heat exchanger (31) is positioned towards the rear of the casing (40), and the second water heat exchanger (32) is positioned towards the front of the casing (40). The first water heat exchanger (31) and the second water heat exchanger (32) are positioned side by side in the second direction. The pump (33) is positioned to the right of the first water heat exchanger (31). The first water heat exchanger (31) and the pump (33) are positioned side by side in the first direction.

[0061] The heat source unit (1) has an operator-side electrical equipment box (7) and a pump-side electrical equipment box (8). The operator-side electrical equipment box (7) is located at one end (left end) in the first direction of the machine room (S1). The operator-side electrical equipment box (7) houses a control board for switching the operation of the heat source unit (1). The pump-side electrical equipment box (8) is located near the other end (right end) in the first direction of the machine room (S1). The pump-side electrical equipment box (8) is located near the front of the casing (40). The pump (33) and the pump-side electrical equipment box (8) are located side by side in the second direction. The pump-side electrical equipment box (8) houses an inverter device for adjusting the rotational speed of the pump (33).

[0062] (5) Operating The cooling operation of the heat source unit (1) will be explained with reference to Figure 1. Below, an example in which all refrigerant circuits (10) are operating will be described. In cooling operation, the compressors (11A, 11B, 11C, 11D) and the pump (33) are in operation. In the first refrigerant circuit (10A), the refrigerant compressed by the first compressor (11A) is condensed in the first air heat exchanger (12A). A portion of the condensed refrigerant flows through the first liquid passage (L1) of the first subcooling heat exchanger (14A). The remainder of this refrigerant is depressurized by the cooling expansion valve (25) of the injection tube (22) and then flows through the second liquid passage (L2). In the first subcooling heat exchanger (14A), the refrigerant in the first liquid passage (L1) is cooled by the refrigerant in the second liquid passage (L2). The refrigerant in the second liquid passage (L2) is drawn into the intermediate pressure section of the first compressor (11A). The refrigerant cooled in the first liquid channel (L1) passes through the liquid pipe (21) and flows through the first refrigerant channel (R1) of the first water heat exchanger (31). In the first water heat exchanger (31), the refrigerant in the first refrigerant channel (R1) absorbs heat from the water in the first water channel (W1) and evaporates. The refrigerant evaporated in the first water heat exchanger (31) passes through the first accumulator (15A) and is then drawn into the first compressor (11A).

[0063] The second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D) perform a similar refrigeration cycle.

[0064] In the water circuit (30), water transported by the pump (33) flows through the first water channel (W1) of the first water heat exchanger (31). In the first water heat exchanger (31), the water in the first water channel (W1) is cooled by the refrigerant in the first refrigerant channel (R1) and the second refrigerant channel (R2). The water that flows out of the first water heat exchanger (31) flows through the second water channel (W2) of the second water heat exchanger (32). In the second water heat exchanger (32), the water in the second water channel (W2) is cooled by the refrigerant in the third refrigerant channel (R3) and the fourth refrigerant channel (R4). The water cooled in this manner is used as a cooling source for air conditioning.

[0065] (6) Configuration of support members The heat source unit (1) has a support member (50) that supports the refrigerant piping (RP) of the refrigerant circuit (10). The support member (50) of this disclosure supports the liquid pipe (21) of the refrigerant piping (RP) as the supported pipe. Details of the support member (50) will be described with reference to Figures 6 to 10.

[0066] (6-1) Support member The support member (50) of this disclosure is composed of a first reinforcing frame (FR1), which is a first frame. The support member (50) serves as both a member for supporting the refrigerant piping (RP) and a frame for the casing (40). In other words, the support member (50) serves as both a member for supporting the refrigerant piping (RP) and a reinforcing member for the casing (40).

[0067] As shown in Figures 7 to 10, the support member (50) is located on the front side of the casing (40). The support member (50) is located at the connection between the lower housing portion (41) and the upper housing portion (42). The support member (50) extends along the first direction, which is the longitudinal direction of the casing (40). In other words, the longitudinal direction of the support member (50) extends along the first direction. The support member (50) extends from the left end to the right end of the main body portion (41a) of the casing (40).

[0068] The support member (50) in this example has one first support portion (50a) and one second support portion (50b). The first support portion (50a) and the second support portion (50b) are arranged adjacent to each other in the first direction. The first support portion (50a) is located on the left side of the casing (40), and the second support portion (50b) is located on the right side of the casing (40). The support member (50) may consist of one member or of three or more members.

[0069] As shown in Figure 9, the support member (50) is formed in a concave shape when viewed in a cross section perpendicular to the first direction. More precisely, the support member (50) is formed in a concave shape that opens toward the side (front) of the casing (40). The support member (50) has a lower wall (51), an upper wall (52) located above the lower wall (51) and facing the lower wall (51), and a side wall (53) that spans the lower wall (51) and the upper wall (52). The side wall (53) extends vertically so as to connect the rear end of the lower wall (51) and the rear end of the upper wall (52). The lower wall (51), upper wall (52), and side wall (53) extend along the first direction. The lower wall (51), upper wall (52), and side wall (53) are formed by bending a metal sheet in the thickness direction.

[0070] The support member (50) has a lower mounting plate (54) and an upper mounting plate (55). The lower mounting plate (54) extends upward from the front end of the lower wall (51). The upper end of the lower mounting plate (54) is located below the vertical midpoint of the support member (50). The upper mounting plate (55) extends downward from the front end of the upper wall (52). The lower end of the upper mounting plate (55) is located above the vertical midpoint of the support member (50). The lower mounting plate (54) and the upper mounting plate (55) are arranged with a predetermined distance between them in the vertical direction. This distance is greater than the outer diameter of the liquid pipe (21) as the supported piping.

[0071] A first space (56) is formed inside the support member (50). The first space (56) is a roughly rectangular space when viewed in a cross section perpendicular to the first direction. The first space (56) extends along the first direction. The first space (56) is a space for housing refrigerant piping (RP). In this example, in addition to refrigerant piping (RP), electrical wiring (E) is also housed in the first space (56). In this example, multiple (for example, three) electrical wires (E) are arranged in the first space (56).

[0072] As shown in Figures 7 and 8, the support member (50) has a plurality of holes. These holes are for passing refrigerant piping (RP). The plurality of holes include a first hole (61), a second hole (62), a third hole (63), a fourth hole (64), and a fifth hole (65), arranged sequentially from left to right. These holes are formed by notches formed in the support member (50). These holes are formed across the lower mounting plate (54) and the lower wall (51). These holes penetrate the support member (50) in the thickness direction. These holes connect the first space (56) and the machine room (S1).

[0073] The first hole (61) is located near the first compressor (11A) and the first subcooled heat exchanger (14A). The second hole (62) is located near the second compressor (11B) and the second subcooled heat exchanger (14B). The third hole (63) is located near the third compressor (11C) and the third subcooled heat exchanger (14C). The fourth hole (64) and the fifth hole (65) are located near the second water heat exchanger (32).

[0074] (6-2) Inner cover As shown in Figures 9 and 10, the heat source unit (1) has an inner cover (70). The inner cover (70) constitutes a shielding member that covers the open portion of the support member (50). The inner cover (70) extends along a first direction. In this example, the heat source unit (1) has four inner covers (70). The four inner covers (70) are arranged in a line along the first direction. The number of inner covers (70) may be one, two, three, or five or more. When viewed in a cross section perpendicular to the first direction, the inner cover (70) generally extends in the vertical direction. The inner cover (70) has a first vertical wall (71) formed at the bottom of the inner cover (70), a second vertical wall (72) formed at the top of the inner cover (70), and a continuous wall (73) formed between the first vertical wall (71) and the second vertical wall (72). The first vertical wall (71) is located outside (front) of the lower mounting plate (54). The second vertical wall (72) is located inside (rear) of the upper mounting plate (55). The continuous wall (73) is inclined so as it goes upward, it moves closer to the inside of the support member (50).

[0075] The inner cover (70) is detachably fixed to the support member (50). The inner cover (70) is attached to the open portion of the support member (50). Specifically, the first vertical wall (71) of the inner cover (70) is fixed to the lower mounting plate (54) via fastening members (not shown). The second vertical wall (72) of the inner cover (70) is fixed to the upper mounting plate (55) via fastening members (not shown).

[0076] The support member (50) and the inner cover (70) are formed in a rectangular shape as a whole when viewed in a cross section perpendicular to the first direction. The support member (50) and the inner cover (70) constitute a rectangular tubular reinforcing member extending in the first direction.

[0077] (6-3) Outer cover As shown in Figures 9 and 10, the heat source unit (1) has an outer cover (80). The outer cover (80) constitutes a first side plate that forms part of the side surface of the casing (40). In other words, the outer cover (80) constitutes part of the outer plate of the casing (40). The outer cover (80) constitutes a shielding member that covers the open portion of the support member (50). The outer cover (80) extends along a first direction. The outer cover (80) is located on the outside (front side) of the inner cover (70). In this example, the heat source unit (1) has two outer covers (80). The two outer covers (80) are arranged side by side along the first direction. Of these outer covers (80), the left outer cover (80) is located in front of the first support (50a), and the right outer cover (80) is located in front of the second support (50b).

[0078] The outer cover (80) is constructed by folding sheet metal. The outer cover (80) has a thinner sheet metal than the inner cover (70) and the support member (50). The outer cover (80) has a bulge portion (81) that protrudes forward, a lower plate (82) that extends downward from the base of the lower end of the bulge portion (81), and an upper plate (83) that extends upward from the base of the upper end of the bulge portion (81). When viewed in a cross section perpendicular to the first direction, the bulge portion (81) is formed in a concave shape that opens towards the rear.

[0079] The outer cover (80) is detachably fixed to the support member (50). The outer cover (80) is attached to the open portion of the support member (50). Specifically, the upper plate (83) of the outer cover (80) is fixed to the upper mounting plate (55) via fastening members (not shown). In this example, the second vertical wall (72) of the inner cover (70) is sandwiched between the upper mounting plate (55) and the outer cover (80). The lower plate (82) of the outer cover (80) is fixed to the frame of the casing (40) (more precisely, the second horizontal frame (Fa2) described above) via fastening members (not shown).

[0080] (6-4) Arrangement of refrigerant piping Next, the configuration of the refrigerant piping (RP) supported by the support member (50) will be described. The heat source unit (1) in this example has a first liquid pipe (21A), a second liquid pipe (21B), a third liquid pipe (21C), and a fourth liquid pipe (21D) as liquid pipes (21) through which liquid refrigerant flows. The first liquid pipe (21A) is the refrigerant piping (RP) of the first refrigerant circuit (10A), the second liquid pipe (21B) is the refrigerant piping (RP) of the second refrigerant circuit (10B), and the third liquid pipe (21C) is the refrigerant piping (RP) of the third refrigerant circuit (10C). In this example, the support member (50) supports the first liquid pipe (21A), the second liquid pipe (21B), and the third liquid pipe (21C), but does not support the fourth liquid pipe (21).

[0081] The first liquid pipe (21A) is a liquid pipe connecting the first subcooled heat exchanger (14A) and the first water heat exchanger (31). The first liquid pipe (21A) runs from the first subcooled heat exchanger (14A) in the machine room (S1) through the first hole (61) of the support member (50) to the first space (56). The first supported pipe (SP1) of the first liquid pipe (21A) extends along the first direction together with the support member (50). The first supported pipe (SP1) is supported from below by the lower wall (51) of the support member (50).

[0082] The second liquid pipe (21B) is a liquid pipe connecting the second supercooled heat exchanger (14B) and the second water heat exchanger (32) in the machine room (S1). The second liquid pipe (21B) extends from the second supercooled heat exchanger (14B) through the second hole (62) of the support member (50) to the first space (56). The second supported pipe (SP2) of the second liquid pipe (21B) extends along the first direction together with the support member (50). The second supported pipe (SP2) is supported from below by the lower wall (51) of the support member (50).

[0083] The third liquid pipe (21C) is a liquid pipe connecting the third subcooled heat exchanger (14C) and the second water heat exchanger (32). The third liquid pipe (21C) runs from the third subcooled heat exchanger (14C) in the machine room (S1) through the third hole (63) of the support member (50) to the first space (56). The third supported pipe (SP3) of the third liquid pipe (21C) extends along the first direction together with the support member (50). The third supported pipe (SP3) is supported from below by the lower wall (51) of the support member (50).

[0084] As shown in Figures 7 to 9, the first supported pipe (SP1), the second supported pipe (SP2), and the third supported pipe (SP3) are arranged in a second direction, which is a horizontal direction perpendicular to the first direction. In this example, the first supported pipe (SP1), the second supported pipe (SP2), and the third supported pipe (SP3) are arranged in order from the rear to the front.

[0085] As shown in Figure 8, the support member (50) has three regions formed in order from the left side, which is furthest from the water heat exchangers (31, 32), to the right side, which is closer to the water heat exchangers (31, 32). The first region (A1) is the region where only the first supported pipe (SP1) of the three supported pipes is supported. The second region (A2) is the region where only the first supported pipe (SP1) and the second supported pipe (SP2) of the three supported pipes are supported. The third region (A3) is the region where all three supported pipes (SP1, SP2, and SP3) are supported.

[0086] The first liquid pipe (21A) runs from the first supported piping (SP1) in the first space (56) through the fifth hole (65) to the machine room (S1). The first liquid pipe (21A), having reached the machine room (S1) from the fifth hole (65), connects to the first refrigerant flow path (R1) of the first water heat exchanger (31).

[0087] The second liquid pipe (21B) goes from the second supported piping (SP2) in the first space (56) through the fifth hole (65) to the machine room (S1). The second liquid pipe (21B) that goes from the fifth hole (65) to the machine room (S1) is connected to the second refrigerant flow path (R2) of the first water heat exchanger (31).

[0088] The third liquid pipe (21C) runs from the third supported piping (SP3) in the first space (56) through the fourth hole (64) to the machine room (S1). The third liquid pipe (21C), having reached the machine room (S1) from the fourth hole (64), connects to the third refrigerant flow path (R3) of the second water heat exchanger (32).

[0089] The fourth liquid pipe (21) does not go from the fourth subcooling heat exchanger (14D) in the machine room (S1) to the first space (56), but connects to the fourth refrigerant flow path (R4) of the second water heat exchanger (32).

[0090] (6-5) Retaining member As shown in Figures 8 and 9, a retaining member (90) is provided in the first space (56). In this example, a plurality (for example, six) of retaining members (90) are arranged on the lower wall (51) of the support member (50). The plurality of retaining members (90) are arranged at predetermined intervals along the first direction. The six retaining members (90) include a first retaining member (91) arranged in the first region (A1), a second retaining member (92) arranged in the second region (A2) to hold the second supported pipe (SP2), and a third retaining member (93) arranged in the third region (A3). In this example, the configurations of the first retaining member (91), the second retaining member (92), and the third retaining member (93) are basically the same.

[0091] The retaining member (90) is installed on the upper surface of the lower wall (51) of the support member (50). The retaining member (90) is formed in the shape of a rectangular parallelepiped extending in the front-rear direction. A first groove (94a), a second groove (94b), and a third groove (94c) are formed on the upper surface of the retaining member (90). These grooves (94a, 94b, 94c) are formed in a square shape when viewed from a cross section perpendicular to the first direction. The first groove (94a) is a groove into which the first supported pipe (SP1) is fitted, the second groove (94b) is a groove into which the second supported pipe (SP2) is fitted, and the third groove (94c) is a groove into which the third supported pipe (SP3) is fitted. The retaining member (90) is elastic, and it is preferable that each supported pipe is press-fitted into each groove.

[0092] The first holding member (91) holds the first supported pipe (SP1) inside the first groove (94a). The second holding member (92) holds the first supported pipe (SP1) inside the first groove (94a) and holds the second supported pipe (SP2) inside the second groove (94b). The second holding member (92) holds the first supported pipe (SP1) and the second supported pipe (SP2) with a predetermined distance between them. The third holding member (93) holds the first supported pipe (SP1) inside the first groove (94a), holds the second supported pipe (SP2) inside the second groove (94b), and holds the third supported pipe (SP3) inside the third groove (94c). The third holding member (93) holds the first supported pipe (SP1), the second supported pipe (SP2), and the third supported pipe (SP3) with a predetermined distance between them.

[0093] (6-6) Electrical Wiring The support member (50) supports the electrical wiring (E) in addition to the refrigerant piping (RP). As shown in Figure 9, the electrical wiring (E) is located above the supported piping (SP1, SP2, SP3) and extends in a first direction. The electrical wiring (E) includes signal lines that output signals from temperature sensors and pressure sensors, as well as transmission lines for communication. A cylindrical covering member (96) is provided around the electrical wiring (E). The covering member (96) is a protective member for the electrical wiring (E) and covers multiple electrical wirings (E) together. The covering member (96) prevents damage to the electrical wiring (E) and prevents water such as condensation from adhering to the electrical wiring (E).

[0094] (7) Work to arrange the refrigerant piping The procedure for the worker to support the refrigerant piping (RP) on the support member (50) is as follows:

[0095] The worker performs the work in the workspace in front of the casing (40). As shown in Figure 10, the worker removes the fastening members and removes the outer cover (80) and inner cover (70). As a result, the first space (56) inside the support member (50) is exposed to the outside of the casing (40) through the opening of the support member (50). The worker places the supported pipes (SP1, SP2, SP3) into the first space (56) and holds them in place with the retaining member (90). As a result, the supported pipes (SP1, SP2, SP3) are supported from below by the lower wall (51) of the support member (50) via the retaining member (90).

[0096] After this work, the worker attaches the inner cover (70) and outer cover (80) to the support member (50) via fastening members. As a result, the refrigerant piping (RP) is housed inside the casing (40).

[0097] (8) Characteristics (8-1) The heat source unit (1) comprises a refrigerant circuit (10) having compressors (11A, 11B, 11C, 11D) and air heat exchangers (12A, 12B, 12C, 12D), a machine room (S1) where the compressors (11A, 11B, 11C, 11D) are located, and a blower room (S2) located above the machine room (S1) where the air heat exchangers (12A, 12B, 12C, 12D) are located, and also includes a casing (40) extending in a first direction along the horizontal direction, The system includes water heat exchangers (31, 32) arranged in line with the compressors (11A, 11B, 11C, 11D) along a first direction to exchange heat between the refrigerant in the refrigerant circuit (10) and water, and support members (50) that extend along the first direction above the bottom plate (44) of the machine room (S1) and support refrigerant piping (RP) connecting the compressors (11A, 11B, 11C, 11D) and the water heat exchangers (31, 32) as supported piping (SP1, SP2, SP3).

[0098] In conventional configurations, the refrigerant piping of the refrigerant circuit was sometimes installed on the bottom plate of the machine room. In this configuration, the refrigerant piping interfered with the various components installed in the machine room, such as the compressor, accumulator, and subcooling heat exchanger, making the refrigerant piping layout difficult. Furthermore, the interference between the components and the refrigerant piping limited the flexibility of the layout of each component, resulting in the problem of increasing the size of the machine room and even the casing.

[0099] In contrast, in the configuration of this embodiment, a support member (50) is positioned above the bottom plate (44) of the machine room (S1), and the support member (50) extends in a first direction which is the longitudinal direction of the casing (40). The support member (50) supports the refrigerant piping (RP) connecting the compressors (11A, 11B, 11C, 11D) and the water heat exchangers (31, 32) as supported piping (SP1, SP2, SP3). This prevents interference between the refrigerant piping (RP) and each piece of equipment near the bottom plate (44) of the machine room (S1). As a result, the arrangement of the refrigerant piping (RP) can be easily performed. In addition, the layout flexibility of each component in the machine room (S1), such as the compressors (11A, 11B, 11C, 11D), accumulators (15A, 15B, 15C, 15D), and subcooled heat exchangers (14A, 14B, 14C, 14D), is improved, allowing for a smaller machine room (S1) and, furthermore, a smaller casing (40).

[0100] By suppressing interference between the refrigerant piping (RP) and each piece of equipment, there is no need to install buffer materials or other components in the refrigerant piping (RP). This reduces the number of parts.

[0101] Furthermore, since the refrigerant piping (RP) is simply supported by the support member (50), the support structure for the refrigerant piping (RP) can be simplified.

[0102] (8-2) The casing (40) has a first reinforcing frame (FR1) which is a first frame extending in a first direction. The support member (50) is the first reinforcing frame (FR1).

[0103] In this configuration, the support member (50) also serves as the frame of the casing (40). This simplifies the configuration of the support structure for the refrigerant piping (RP). Since the support member (50) extends in the first direction, it can be used as a beam for the casing (40).

[0104] (8-3) The casing (40) has an outer cover (80) which is configured to be detachable from the casing (40) and which forms part of the side surface of the casing (40) along the first direction. The support member (50) is located inside the outer cover (80).

[0105] In this configuration, the outer cover (80) can be removed from the casing (40) to allow the worker easy access to the support member (50). This makes it easier to support the refrigerant piping (RP) on the support member (50). The outer cover (80) protects the supported piping (SP1, SP2, SP3) from rain and wind outside the casing (40).

[0106] (8-4) The support member (50) is concave, opening towards the outer cover (80) when viewed in a cross-section perpendicular to the first direction. The supported pipes (SP1, SP2, SP3) are arranged inside the support member (50).

[0107] In this configuration, the rigidity of the support member (50) is improved by making the cross-section of the support member (50) concave. Space can be secured inside the support member (50) to accommodate the supported pipes (SP1, SP2, SP3). Since the support member (50) opens towards the outer cover (80), the worker can easily access the refrigerant pipes (RP) after removing the outer cover (80).

[0108] (8-5) The supported pipes (SP1, SP2, SP3) are liquid pipes through which the liquid refrigerant of the refrigerant circuit (10) flows.

[0109] Liquid pipes have a smaller diameter and lower rigidity compared to gas pipes. Therefore, there is a higher risk of damage to the liquid pipes if they come into contact with other equipment. For this reason, conventional configurations require a large clearance between the liquid pipes and equipment, which limits the flexibility of the layout of each piece of equipment.

[0110] In contrast, in the configuration of this embodiment, the support member (50) supports the liquid pipe (21), thus suppressing interference between the liquid pipe (21) and each piece of equipment. As a result, the degree of freedom in the layout of each piece of equipment is improved, making it possible to particularly miniaturize the machine room (S1) and even the casing (40).

[0111] (8-6) The support member (50) is positioned below the bottom surface of the blower chamber (S2) (the upper surface (45a) of the intermediate plate (45)). This prevents the support member (50) from being excessively high. As a result, it becomes easier for workers to support the refrigerant piping (RP) with the support member (50).

[0112] (8-7) The refrigerant circuit (10) includes at least a first refrigerant circuit (10A) having a first compressor (11A) and a first air heat exchanger (12A), and a second refrigerant circuit (10B) having a second compressor (11B) and a second air heat exchanger (12B). The supported piping (SP1, SP2, SP3) includes at least a first supported piping (SP1) which is the supported piping of the first refrigerant circuit (10A), and a second supported piping (SP2) which is the supported piping of the second refrigerant circuit (10B). The support member (50) supports at least the first supported piping (SP1) and the second supported piping (SP2).

[0113] In this configuration, the support member (50) supports two or more supported pipes (SP1, SP2, SP3), thus simplifying the support structure for multiple supported pipes (SP1, SP2, SP3).

[0114] Strictly speaking, in this example there are four refrigerant circuits (10) and three supported pipes (SP1, SP2, SP3), but these numbers are merely illustrative.

[0115] (8-8) The first supported pipe (SP1) and the second supported pipe (SP2) are arranged side by side in a second direction that is perpendicular to the first direction and aligned with the horizontal direction.

[0116] In this configuration, since two or more supported pipes (SP1, SP2, SP3) are arranged horizontally, the height of the casing (40) can be reduced.

[0117] (8-9) The support member (50) has an inner cover (70) which acts as a shielding member to close the open portion of the concave support member (50). This allows the support member (50) and the inner cover (70) to form a cylindrical reinforcing member. This prevents outside air from entering the inside of the support member (50) and promoting condensation.

[0118] (9) Other embodiments The embodiments described above may also have the following configurations.

[0119] The heat source unit (1) in this embodiment is a chilling unit dedicated to cooling, which generates chilled water. However, the heat source unit (1) may also be a so-called heat pump type chilling unit that generates both chilled and hot water. The heat source unit (1) may also be a heat source unit for hot water supply, which generates hot water.

[0120] The water heat exchangers (31, 32) may be one or three or more.

[0121] The support member (50) does not necessarily have to be a frame of the casing (40), but may be any member extending in the first direction above the machine room (S1). If the support member (50) is a frame, it may be a second reinforcing frame (FR2) or another lateral frame. The support member (50) may be a frame extending in the first direction at an intermediate position in the front-rear direction of the casing (40).

[0122] The support member (50) does not necessarily have to support the supported pipes (SP1, SP2, SP3) from below. For example, the supported pipes (SP1, SP2, SP3) may be placed below the support member (50) extending in the first direction, and the supported pipes (SP1, SP2, SP3) may be wrapped around the support member (50) with cable ties or the like. In this case, the support member (50) supports the supported pipes (SP1, SP2, SP3) from above. The support member (50) may also support the supported pipes (SP1, SP2, SP3) from the side.

[0123] The support member (50) indirectly supports the supported pipes (SP1, SP2, SP3) via the holding member (90). However, the support member (50) may directly support the supported pipes (SP1, SP2, SP3). For example, the holding member (90) shown in Figure 9 may be omitted. In this case, the supported pipes (SP1, SP2, SP3) are installed on the upper surface of the lower wall (51) of the support member (50). In this configuration, the support member (50) directly supports the supported pipes (SP1, SP2, SP3) from below.

[0124] The support member (50) does not have to be concave; for example, it may be a plate extending in the first direction, or it may be a T-shaped or I-shaped member in a cross-section perpendicular to the first direction. In this case, it is preferable that the support member (50) has a flat portion that supports the support member (50) from below.

[0125] If the support member (50) has a concave cross-section, the open portion of the support member (50) may be oriented upward. In this case, it is preferable to install the supported pipes (SP1, SP2, SP3) at the bottom of the support member (50).

[0126] The supported piping (SP1, SP2, SP3) may be gas pipes through which gaseous refrigerant flows. In this case, the gas pipes may be high-pressure gas pipes or low-pressure gas pipes.

[0127] The support member (50) may be located in the blower room (S2) and may extend in the first direction.

[0128] Multiple supported pipes (SP1, SP2, SP3) may be arranged in a vertical direction, for example. In this case, the casing (40) can be made smaller in the front-to-back direction.

[0129] The support member (50) does not necessarily have to have the lower mounting plate (54) or upper mounting plate (55) shown in Figure 9. In this case, the inner cover (70) and outer cover (80) are detachably attached to a frame other than the support member (50) or to the outer panel.

[0130] The inner cover (70) and the outer cover (80), or both, may be omitted.

[0131] The retaining member (90) does not necessarily have to hold multiple supported pipes (SP1, SP2, SP3), and may be configured to hold only one supported pipe. In this case, the retaining member (90) has one groove into which one supported pipe fits.

[0132] While embodiments and modifications have been described above, it will be understood that a variety of changes in form and details are possible without departing from the spirit and scope of the claims. Furthermore, the embodiments, modifications, and other embodiments described above may be combined or substituted as appropriate, as long as they do not impair the functions covered by this disclosure.

[0133] The designations "1st," "2nd," "3rd," etc., mentioned above are used to distinguish between the terms to which these designations are attached, and do not limit the number or order of those terms. [Industrial applicability]

[0134] As described above, this disclosure is useful for heat source units. [Explanation of symbols]

[0135] 1 Heat source unit 10 Refrigerant Circuit 11A, 11B, 11C, 11D Compressors 12A, 12B, 12C, 12D Air Heat Exchanger 21 Liquid tubes 31,32 Water heat exchanger 40 Casing 45a Top (bottom) 50 Support member 80 Outer cover (first side panel) 90 Retaining member FR1 First Reinforcement Frame (First Frame) P Refrigerant piping S1 Machine room (1st room) S2 Blower room (2nd room) SP1,SP2,SP3 Supported piping

Claims

1. A refrigerant circuit (10) having compressors (11A, 11B, 11C, 11D) and air heat exchangers (12A, 12B, 12C, 12D), A casing (40) extends in a first direction along the horizontal direction, forming a first chamber (S1) in which the compressors (11A, 11B, 11C, 11D) are arranged, and a second chamber (S2) located above the first chamber (S1) in which the air heat exchangers (12A, 12B, 12C, 12D) are arranged. Arranged in line with the compressors (11A, 11B, 11C, 11D) along the first direction, the water heat exchangers (31, 32) exchange heat between the refrigerant and water in the refrigerant circuit (10), The first chamber (S1) includes a support member (50) that extends along the first direction above the bottom surface (44) and supports the refrigerant piping (RP) connecting the compressors (11A, 11B, 11C, 11D) and the water heat exchangers (31, 32) as supported piping (SP1, SP2, SP3), The casing (40) has a plurality of frames, including a first frame (FR1) extending in the first direction. The support member (50) is the first frame (FR1), The casing (40) has a first side plate (80) which forms a part of the side surface of the casing (40) along the first direction and is detachably attached to the casing (40). The first frame (FR1) and the supported pipes (SP1, SP2, SP3) supported by the first frame (FR1) are located inside the first side plate (80). Heat source unit.

2. A refrigerant circuit (10) having compressors (11A, 11B, 11C, 11D) and air heat exchangers (12A, 12B, 12C, 12D), A casing (40) extends in a first direction along the horizontal direction, forming a first chamber (S1) in which the compressors (11A, 11B, 11C, 11D) are arranged, and a second chamber (S2) located above the first chamber (S1) in which the air heat exchangers (12A, 12B, 12C, 12D) are arranged. Arranged in line with the compressors (11A, 11B, 11C, 11D) along the first direction, the water heat exchangers (31, 32) exchange heat between the refrigerant and water in the refrigerant circuit (10), The first chamber (S1) includes a support member (50) that extends along the first direction above the bottom surface (44) and supports the refrigerant piping (RP) connecting the compressors (11A, 11B, 11C, 11D) and the water heat exchangers (31, 32) as supported piping (SP1, SP2, SP3), The air heat exchanger includes a first air heat exchanger (12A) located at one end of the casing (40) in the first direction, The water heat exchanger is positioned on the other end side in the first direction of the casing (40), The supported pipes (SP1, SP2, SP3) are liquid pipes (21) through which the liquid refrigerant of the refrigerant circuit (10) flows. The liquid pipe (21) is connected in the refrigerant circuit (10) between the air heat exchangers (12A, 12B, 12C, 12D) and the water heat exchangers (31, 32). The liquid pipe (21) includes a first liquid pipe (21A) that connects the first air heat exchanger (12A) and the water heat exchanger (31). Heat source unit.

3. A refrigerant circuit (10) having compressors (11A, 11B, 11C, 11D) and air heat exchangers (12A, 12B, 12C, 12D), A casing (40) extends in a first direction along the horizontal direction, forming a first chamber (S1) in which the compressors (11A, 11B, 11C, 11D) are arranged, and a second chamber (S2) located above the first chamber (S1) in which the air heat exchangers (12A, 12B, 12C, 12D) are arranged. Arranged in line with the compressors (11A, 11B, 11C, 11D) along the first direction, the water heat exchangers (31, 32) exchange heat between the refrigerant and water in the refrigerant circuit (10), The first chamber (S1) includes a support member (50) that extends along the first direction above the bottom surface (44) and supports the refrigerant piping (RP) connecting the compressors (11A, 11B, 11C, 11D) and the water heat exchangers (31, 32) as supported piping (SP1, SP2, SP3), The casing (40) has a plurality of frames, including a first frame (FR1) extending in the first direction. The support member (50) is the first frame (FR1), The casing (40) has a first side plate (80) which forms a part of the side surface of the casing (40) along the first direction and is detachably attached to the casing (40). The first frame (FR1) is located inside the first side plate (80), The first frame (FR1), when viewed in a cross-section perpendicular to the first direction, has a concave shape that opens toward the first side plate (80). The supported pipes (SP1, SP2, SP3) are arranged inside the first frame (FR1). Heat source unit.

4. A refrigerant circuit (10) having compressors (11A, 11B, 11C, 11D) and air heat exchangers (12A, 12B, 12C, 12D), A casing (40) extends in a first direction along the horizontal direction, forming a first chamber (S1) in which the compressors (11A, 11B, 11C, 11D) are arranged, and a second chamber (S2) located above the first chamber (S1) in which the air heat exchangers (12A, 12B, 12C, 12D) are arranged. Arranged in line with the compressors (11A, 11B, 11C, 11D) along the first direction, the water heat exchangers (31, 32) exchange heat between the refrigerant and water in the refrigerant circuit (10), The first chamber (S1) includes a support member (50) that extends along the first direction above the bottom surface (44) and supports the refrigerant piping (RP) connecting the compressors (11A, 11B, 11C, 11D) and the water heat exchangers (31, 32) as supported piping (SP1, SP2, SP3), The refrigerant circuit (10) is A first refrigerant circuit (10A) having a first compressor (11A) and a first air heat exchanger (12A), It includes a second refrigerant circuit (10B) having a second compressor (11B) and a second air heat exchanger (12B), The supported pipes (SP1, SP2, SP3) are, The first supported piping (SP1), which is the supported piping of the first refrigerant circuit (10A), The second supported piping (SP2) is a supported piping of the second refrigerant circuit (10B), The support member (50) supports the first supported pipe (SP1) and the second supported pipe (SP2), The first supported pipe (SP1) and the second supported pipe (SP2) are arranged side by side in a second direction that is perpendicular to the first direction and aligns with the horizontal direction. Heat source unit.

5. The support member (50) is positioned below the bottom surface (45a) of the second chamber (S2). A heat source unit according to any one of claims 1 to 4.

6. The refrigerant circuit (10) is A first refrigerant circuit (10A) having a first compressor (11A) and a first air heat exchanger (12A) It includes a second refrigerant circuit (10B) having a second compressor (11B) and a second air heat exchanger (12B), The supported pipes (SP1, SP2, SP3) are, The first supported piping (SP1), which is the supported piping of the first refrigerant circuit (10A), The second supported piping (SP2) is a supported piping of the second refrigerant circuit (10B), The support member (50) supports the first supported pipe (SP1) and the second supported pipe (SP2). A heat source unit according to any one of claims 1 to 3.

7. The first supported pipe (SP1) and the second supported pipe (SP2) are arranged side by side in a second direction that is perpendicular to the first direction and aligns with the horizontal direction. The heat source unit according to claim 6.

8. The system further includes a holding member (90) that holds both the first supported pipe (SP1) and the second supported pipe (SP2) with a predetermined distance between them. The heat source unit according to claim 7.

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