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] The present 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 includes 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 in 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] The present disclosure is to facilitate the arrangement of the refrigerant piping.

Means for Solving the Problems

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

[0008] Here, the phrase "along the ~ direction" includes not only a direction parallel to the "~ direction" but also a direction that does not rapidly deviate from the "~ direction". Specifically, it means a direction forming an angle less than 45 degrees with respect to the "~ direction". Therefore, for example, the meaning of the phrase "a water heat exchanger arranged along the first direction in parallel with the compressors" is that not only are the compressors and the water heat exchanger arranged in the first direction, but also the compressors and the water heat exchanger are arranged in a direction within an angle range less than 45 degrees with respect to the first direction. The meaning of the phrase "along the ~ direction" in other parts of this specification is the same.

[0009] In the first aspect, a support member (50) is provided above the bottom surface ( 44 ) of the first chamber (S1). 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 pipes (RP) on the support member (50). As a result, interference between the equipment installed in the first chamber (S1) and the refrigerant pipes (RP) can be suppressed, and the arrangement of the refrigerant pipes (RP) becomes easier.

[0010] The second aspect is that, in the first aspect, 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).

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

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

[0013] In the third aspect, by removing the first side plate (80) of the casing (40), an operator can easily access the pipes to be supported (SP1, SP2, SP3).

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

[0015] In the fourth aspect, since the first frame (FR1) is formed in a concave shape, the strength of the first frame (FR1) is increased. By removing the first side plate (80), an operator can easily access the pipes to be supported (SP1, SP2, SP3) inside the first frame (FR1).

[0016] The fifth aspect is that, in any one of the first to fourth aspects, the pipes to be supported (SP1, SP2, SP3) are liquid pipes through which the liquid refrigerant of the refrigerant circuit (10) flows.

[0017] In the fifth aspect, the arrangement of the liquid pipe (21) as the supported pipe becomes easier. The liquid pipe (21) has a smaller pipe diameter and lower rigidity compared to the gas pipe. For this reason, the clearance required between the liquid pipe (21) and each device is larger than the clearance required between the gas pipe and each device. By supporting the liquid pipe (21) with the support member (50), the clearance between the liquid pipe (21) and each device can be ensured. As a result, the degree of freedom in the layout of these devices is improved.

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

[0019] In the sixth aspect, the position of the supported pipes (SP1, SP2, SP3) does not become too high. The length of the refrigerant pipe (RP) can be shortened and the arrangement of the refrigerant pipe (RP) becomes easier.

[0020] In the seventh aspect, in any one of the first to sixth aspects, the refrigerant circuit (10) includes 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 pipes (SP1, SP2, SP3) include a first supported pipe (SP1) that is a supported pipe of the first refrigerant circuit (10A) and a second supported pipe (SP2) that is a supported pipe of the second refrigerant circuit (10B). The support member (50) supports the first supported pipe (SP1) and the second supported pipe (SP2).

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

[0022] In the eighth aspect, 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 orthogonal 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 horizontally, 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

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0027] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. It should be noted that the present disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of the present disclosure. Since each drawing is for conceptually explaining the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for easy understanding.

[0028] (1) Overview The heat source unit (1) according to this embodiment is used as the heat source of an air conditioner. The air conditioner performs air conditioning in offices, shopping malls, factories, etc. The heat source unit (1) is a cooling-only chiller unit that generates chilled water. The heat source unit (1) is an air-cooled chiller 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 FIG. 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 it may be one, two, three, or five or more. The basic configurations of the first refrigerant circuit (10A), the second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D) are the same. In FIG. 1, for the sake of convenience, the detailed illustration of the third refrigerant circuit (10C) and the fourth refrigerant circuit (10D) is omitted. Each refrigerant circuit (10) is filled with refrigerant. Each refrigerant circuit (10) performs a vapor compression refrigeration cycle by circulating the refrigerant.

[0030] The first refrigerant circuit (10A) mainly has a first compressor (11A), a first air heat exchanger (12A), and a first expansion valve (13A). The first refrigerant circuit (10A) has 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 type, turbo type, and rotary type. The first air heat exchanger (12A) is an outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air. The first air heat exchanger (12A) is a fin-and-tube type heat exchanger. The first air heat exchanger (12A) in this example functions only as a radiator (condenser) that dissipates heat from the refrigerant. The first expansion valve (13A) reduces the pressure of the condensed refrigerant. The first expansion valve (13A) is, for example, an electronic expansion valve. The first subcooling heat exchanger (14A) cools the refrigerant after heat dissipation and increases the subcooling degree of the refrigerant. The first subcooling heat exchanger (14A) exchanges heat between the refrigerant in the first liquid flow path (L1) and the refrigerant in the second liquid flow path (L2).

[0032] The refrigerant circuit (10) has, as elements constituting the refrigerant piping, a discharge pipe (20), a liquid pipe (21), an injection pipe (22), a gas pipe (23), and a suction pipe (24). The discharge pipe (20) connects the discharge side of the first compressor (11A) and 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) and the inflow 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 subcooling heat exchanger (14A) in the liquid pipe (21). The other end of the injection pipe (22) is connected to the intermediate pressure portion (during compression) of the first compressor (11A). A cooling expansion valve (25) is provided in the upstream portion of the injection pipe (22) with respect to the first subcooling heat exchanger (14A). The gas pipe (23) connects the outflow end of the first refrigerant flow path (R1) of the first water heat exchanger (31) and the first accumulator (15A). The suction pipe (24) connects the first accumulator (15A) and 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 includes a second compressor (11B), a second air heat exchanger (12B), and a second expansion valve (13B). The second refrigerant circuit (10B) further includes 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) and 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) and the second accumulator (15B).

[0035] The third refrigerant circuit (10C) mainly includes a third compressor (11C), a third air heat exchanger (12C), and a third expansion valve (13C). The third refrigerant circuit (10C) further includes 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) and 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) and the third accumulator (15C).

[0036] The fourth refrigerant circuit (10D) mainly includes a fourth compressor (11D), a fourth air heat exchanger (12D), and a fourth expansion valve (13D). The fourth refrigerant circuit (10D) further includes 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) and 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) and the fourth accumulator (15D). (3) Water circuit As shown in FIG. 1, the heat source unit (1) has a water circuit (30) through which water flows. In the water circuit (30), a pump (33), a first water heat exchanger (31), and a second water heat exchanger (32) are connected in order from the upstream side to the downstream side of the water flow. The pump (33) conveys the water in the water circuit (30). The first water heat exchanger (31) and the second water heat exchanger (32) are, for example, plate heat exchangers. The first water heat exchanger (31) and the second water heat exchanger (32) exchange heat between the refrigerant and water. The first water heat exchanger (31) and the second water heat exchanger (32) are counter-flow heat exchangers.

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

[0038] The second water heat exchanger (32) has a second water flow path (W2), a third refrigerant flow path (R3), and a fourth refrigerant flow path (R4). The second water flow path (W2) is connected to the water circuit (30), the third refrigerant flow path (R3) is connected to the third refrigerant circuit (10C), and the fourth refrigerant flow path (R4) is connected to the fourth refrigerant circuit (10D). The second water heat exchanger (32) exchanges heat between the water in the second water flow path (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 flow path (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 described with reference to FIGS. 2 to 7. In the following description, the terms related to "front", "rear", "right", "left", "upper", and "lower" are based on the directions indicated by the arrows in FIG. 2. In the following description, the first direction corresponds to the left-right direction which is the horizontal direction, the second direction corresponds to the front-rear direction which is the horizontal direction, and the third direction corresponds to the up-down direction which is the vertical direction.

[0040] (4-1) Casing The heat source unit (1) has a hollow casing (40). The casing (40) is formed in a horizontally long shape where the length in the left-right direction (the first direction) is larger than the length in the front-rear direction (the second direction). As shown in FIG. 5, when viewed from the first direction, the casing (40) has a shape in which the width in the front-rear direction at its upper part expands.

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

[0042] The casing (40) has a plurality of frames and a plurality of outer plates detachably attached to the plurality of frames. The plurality of frames is a framework for fixing the outer plates of the casing (40). The plurality of frames constitutes columns or beams. The plurality of frames has the function of a reinforcing member for reinforcing the casing (40). The outer plates shield the inside and outside of the casing (40). The frames and the outer plates are made of a metal material such as iron or aluminum.

[0043] As shown in FIGS. 2 to 4, the lower housing portion (41) has, as a frame, a first horizontal frame (Fa1), a second horizontal frame (Fa2), a third horizontal frame (Fa3), and a fourth horizontal frame (Fa4). These horizontal frames are formed in a long plate shape extending in the first direction. In other words, these horizontal frames have the first direction as their longitudinal direction. The first horizontal frame (Fa1) is located at the lower end of the front surface of the lower housing portion (41). The second horizontal frame (Fa2) is located at the upper end of the front surface of the lower housing portion (41). The third horizontal frame (Fa3) is located at the lower end of the rear surface of the lower housing portion (41). The fourth horizontal frame (Fa4) is located at the upper end of the rear surface of the lower housing portion (41).

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

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

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

[0047] The upper housing part (42) has, as a frame, 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 surface of the upper housing part (42), and the second intermediate vertical frame (Fc2) is located at the right end of the front surface of the upper housing part (42). The third intermediate vertical frame (Fc3) and the fourth intermediate vertical frame (Fc4) are located in the middle in the left - right direction of the front surface of the upper housing part (42). The third intermediate vertical frame (Fc3) is closer to the left end of the upper housing part (42) than the fourth intermediate vertical frame (Fc4). The first intermediate vertical frame (Fc1), the second intermediate vertical frame (Fc2), the third intermediate vertical frame (Fc3), and the fourth intermediate vertical frame (Fc4) are inclined so as to approach the front side as they go upward. In other words, the first intermediate vertical frame (Fc1), the second intermediate vertical frame (Fc2), the third intermediate vertical frame (Fc3), and the fourth intermediate vertical frame (Fc4) are inclined so as to face obliquely downward.

[0049] The fifth intermediate vertical frame (Fc5) is located at the left end of the rear surface of the upper housing part (42), and the sixth intermediate vertical frame (Fc6) is located at the right end of the rear surface of the upper housing part (42). The seventh intermediate vertical frame (Fc7) and the eighth intermediate vertical frame (Fc8) are located at the middle part in the left - right direction of the rear surface of the upper housing part (42). The seventh intermediate vertical frame (Fc7) is closer to the left end of the upper housing part (42) than the eighth intermediate vertical frame (Fc8). The fifth intermediate vertical frame (Fc5), the sixth intermediate vertical frame (Fc6), the seventh intermediate vertical frame (Fc7), and the eighth intermediate vertical frame (Fc8) are inclined so as to approach the rear side as they go upward. In other words, the fifth intermediate vertical frame (Fc5), the sixth intermediate vertical frame (Fc6), the seventh intermediate vertical frame (Fc7), and the eighth intermediate vertical frame (Fc8) are inclined so as to face obliquely downward.

[0050] In the upper housing part (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), and 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 part (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), and 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 FIG. 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 connecting portion between the lower housing portion (41) and the upper housing portion (42). These reinforcing frames extend along the left - right direction (the first direction). In other words, these reinforcing frames have the first direction as the longitudinal direction. 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 portion (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 portion (42). The details of the first reinforcing frame (FR1) will be described later.

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

[0053] As shown in FIG. 6, the casing (40) has a bottom plate (44) that constitutes its lower surface. The bottom plate (44) is formed in a rectangular plate shape. The bottom plate (44) constitutes 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 a rectangular plate shape. 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) constitutes the bottom surface of the blower room (S2).

[0055] As shown in FIGS. 3 and 4, a partition plate (46) is provided inside the upper housing portion (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 portion (42) into left and right. The space on the left side of the partition plate (46) is the first blower chamber (S2A) as a blower chamber, and the space on the right side of the partition plate (46) is the second blower chamber (S2B) as a blower chamber. The first blower chamber (S2A) communicates with the first suction port (I1), the third suction port (I3), the first blowout port (O1), and the second blowout port (O2). The second blower chamber (S2B) communicates with the second suction port (I2), the fourth suction port (I4), the third blowout port (O3), and the fourth blowout port (O4).

[0056] (4-2) Configuration of Each Device in Blower Chamber As shown in FIGS. 2 to 4, air heat exchangers (12A, 12B, 12C, 12D) are arranged in the blower chamber (S2). Specifically, the first air heat exchanger (12A) and the third air heat exchanger (12C) are arranged in the first blower chamber (S2A), and the second air heat exchanger (12B) and the fourth air heat exchanger (12D) are arranged in the second blower chamber (S2B). The first air heat exchanger (12A) is arranged on the back side of the first suction port (I1), the second air heat exchanger (12B) is arranged on the back side of the second suction port (I2), the third air heat exchanger (12C) is arranged on the back side of the third suction port (I3), and the fourth air heat exchanger (12D) is arranged on the back side of the fourth suction port (I4). The heat transfer tubes of the air heat exchangers (12A, 12B, 12C, 12D) extend along the first direction. As shown in FIG. 6, the air heat exchangers (12A, 12B, 12C, 12D) are inclined so as to approach the outside in the short side direction of the casing (40) as they go upward.

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

[0058] (4-3) Configuration of Each Device in the Machine Room As shown in FIG. 7, in the machine room (S1), a first unit (U1), a second unit (U2), a third unit (U3), and a fourth unit (U4) are arranged in order from left to right. The first unit (U1) includes each component device of the first refrigerant circuit (10A) and a first system electrical component box (6A) for controlling each component device. Each component device of the first refrigerant circuit (10A) includes a first compressor (11A), a first accumulator (15A), and a first subcooling heat exchanger (14A). Similarly, the second unit (U2) includes a second compressor (11B), a second accumulator (15B), a second subcooling heat exchanger (14B), and a second system electrical component box (6B), the third unit (U3) includes a third compressor (11C), a third accumulator (15C), a third subcooling heat exchanger (14C), and a third system electrical component box (6C), and the fourth unit (U4) includes a fourth compressor (11D), a fourth accumulator (15D), a fourth subcooling heat exchanger (14D), and a fourth system 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 arranged closer to the front side 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 arranged at the middle part of the casing (40) in the second direction. The first subcooling heat exchanger (14A), the second subcooling heat exchanger (14B), the third subcooling heat exchanger (14C), and the fourth subcooling heat exchanger (14D) are arranged side by side in the first direction. These subcooling heat exchangers are arranged closer to the front side of the casing (40). Each system electrical component box houses an inverter device or the like for adjusting the rotation speed of the corresponding compressor (11A, 11B, 11C, 11D). These system electrical component boxes are arranged side by side in the first direction. These system electrical component boxes are arranged closer to the rear side of the casing (40).

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

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

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

[0063] In the second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D), the same refrigeration cycle is performed.

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

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

[0066] (6-1) Support member The support member (50) of the present disclosure is constituted by a first reinforcing frame (FR1) that is a first frame. The support member (50) serves both as a member that supports the refrigerant pipe (RP) and as a frame of the casing (40). In other words, the support member (50) serves both as a member that supports the refrigerant pipe (RP) and as a reinforcing member of the casing (40).

[0067] As shown in FIGS. 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 connecting portion between the lower housing portion (41) and the upper housing portion (42). The support member (50) extends along the first direction that 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) of 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 closer to the left side of the casing (40), and the second support portion (50b) is located closer to the right side of the casing (40). The support member (50) may be composed of one member or may be composed of three or more members.

[0069] As shown in FIG. 9, when the support member (50) is viewed in a cross section orthogonal to the first direction, it is formed in a concave shape. Strictly speaking, the support member (50) is formed in a concave shape that opens toward the side surface (front surface) 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 side walls (53) extending between the lower wall (51) and the upper wall (52). The side walls (53) extend 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), the upper wall (52), and the side walls (53) extend along the first direction. The lower wall (51), the upper wall (52), and the side walls (53) are formed by bending a metal steel plate 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 intermediate position in the vertical direction 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 intermediate position in the vertical direction of the support member (50). The lower mounting plate (54) and the upper mounting plate (55) are arranged with a predetermined interval in the vertical direction. This interval is larger than the outer diameter of the liquid pipe (21) as the pipe to be supported.

[0071] Inside the support member (50), a first space (56) is formed. The first space (56) is a substantially rectangular space when viewed in a cross-section orthogonal to the first direction. The first space (56) extends along the first direction. The first space (56) is a space for accommodating the refrigerant pipe (RP). In addition to the refrigerant pipe (RP), electrical wiring (E) is accommodated in the first space (56) of this example. In this example, a plurality of (for example, three) electrical wirings (E) are arranged in the first space (56).

[0072] As shown in FIGS. 7 and 8, a plurality of holes are formed in the support member (50). The plurality of holes are holes for passing the refrigerant pipe (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) that are arranged in order from the left side to the right side. 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 plate thickness direction. These holes communicate the first space (56) and the machine room (S1).

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

[0074] (6-2) Inner Cover As shown in FIGS. 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 the first direction. In this example, the heat source unit (1) has four inner covers (70). The four inner covers (70) are arranged side by side 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 orthogonal 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 lower part of the inner cover (70), a second vertical wall (72) formed at the upper part 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 side) of the lower mounting plate (54). The second vertical wall (72) is located inside (rear side) of the upper mounting plate (55). The continuous wall (73) is inclined so as to approach the inside of the support member (50) as it goes upward.

[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 a fastening member (not shown). The second vertical wall (72) of the inner cover (70) is fixed to the upper mounting plate (55) via a fastening member (not shown).

[0076] When viewed in a cross-section orthogonal to the first direction, the support member (50) and the inner cover (70) are formed in a rectangular shape as a whole. The support member (50) and the inner cover (70) constitute a square tube-shaped reinforcing member that extends in the first direction.

[0077] (6-3) Outer Cover As shown in FIGS. 9 and 10, the heat source unit (1) has an outer cover (80). The outer cover (80) constitutes a first side plate that forms a part of the side surface of the casing (40). In other words, the outer cover (80) constitutes a 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 the first direction. The outer cover (80) is located 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. Among these outer covers (80), the left outer cover (80) is located in front of the first support portion (50a), and the right outer cover (80) is located in front of the second support portion (50b).

[0078] The outer cover (80) is formed by folding a sheet metal. The outer cover (80) has a smaller plate thickness than the inner cover (70) and the support member (50). The outer cover (80) has a bulging portion (81) that bulges forward, a lower plate (82) that extends downward from the base at the lower end of the bulging portion (81), and an upper plate (83) that extends upward from the base at the upper end of the bulging portion (81). The bulging portion (81) is formed in a concave shape that opens backward when viewed in a cross section orthogonal to the first direction.

[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 a fastening member (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) (strictly speaking, the second horizontal frame (Fa2) described above) via a fastening member (not shown).

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

[0081] The first liquid pipe (21A) is a liquid pipe connecting the first subcooling heat exchanger (14A) and the first water heat exchanger (31). The first liquid pipe (21A) reaches the first space (56) from the first subcooling heat exchanger (14A) in the machine room (S1) through the first hole (61) of the support member (50). 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 subcooling heat exchanger (14B) and the second water heat exchanger (32) in the machine room (S1). The second liquid pipe (21B) reaches the first space (56) from the second subcooling heat exchanger (14B) through the second hole (62) of the support member (50). 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 that connects the third subcooling heat exchanger (14C) and the second water heat exchanger (32). The third liquid pipe (21C) extends from the third subcooling 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 FIGS. 7 to 9, the first supported pipe (SP1), the second supported pipe (SP2), and the third supported pipe (SP3) are arranged side by side in a second direction that 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 side by side in order from the rear side to the front side.

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

[0086] The first liquid pipe (21A) extends from the first supported pipe (SP1) in the first space (56) through the fifth hole (65) to the machine room (S1). The first liquid pipe (21A) that reaches the machine room (S1) from the fifth hole (65) is connected to the first refrigerant flow path (R1) of the first water heat exchanger (31).

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

[0088] The third liquid pipe (21C) extends from the third supported pipe (SP3) in the first space (56), passes through the fourth hole (64), and reaches the machine room (S1). The third liquid pipe (21C) that reaches the machine room (S1) from the fourth hole (64) is connected to the third refrigerant flow path (R3) of the second water heat exchanger (32).

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

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

[0091] The holding member (90) is installed on the upper surface of the lower wall (51) of the support member (50). The holding member (90) is formed in a rectangular parallelepiped shape extending in the front-rear direction. On the upper surface of the holding member (90), a first groove (94a), a second groove (94b), and a third groove (94c) are formed. These grooves (94a, 94b, 94c) are formed in a square shape when viewed from a cross-section orthogonal 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 holding member (90) has elasticity, 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 interval therebetween. 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 interval therebetween.

[0093] (6-6) Electrical wiring In addition to the refrigerant pipe (RP), the support member (50) supports the electrical wiring (E). As shown in FIG. 9, the electrical wiring (E) is located above the supported pipes (SP1, SP2, SP3) and extends in the first direction. The electrical wiring (E) includes a signal line that outputs signals from temperature sensors and pressure sensors, a transmission line for communication, and the like. A cylindrical covering member (96) is provided around the electrical wiring (E). The covering member (96) is a member for protecting the electrical wiring (E) and collectively covers a plurality of electrical wirings (E). The covering member (96) prevents damage to the electrical wiring (E) and prevents water such as condensed water from adhering to the electrical wiring (E).

[0094] (7) Operation of arranging refrigerant pipes The operation for the operator to support the refrigerant pipe (RP) on the support member (50) is as follows.

[0095] The operator performs the operation in the working space on the front side of the casing (40). As shown in FIG. 10, the operator removes the fastening member and removes the outer cover (80) and the inner cover (70). As a result, through the opening part of the support member (50), the first space (56) inside the support member (50) is exposed to the outside of the casing (40). The operator puts the pipes to be supported (SP1, SP2, SP3) into the first space (56) and holds them by the holding member (90). As a result, the pipes to be supported (SP1, SP2, SP3) are supported from below by the lower wall (51) of the support member (50) via the holding member (90).

[0096] After this operation, the operator attaches the inner cover (70) and the outer cover (80) to the support member (50) via the fastening member. As a result, the refrigerant pipe (RP) is accommodated inside the casing (40).

[0097] (8) Features (8-1) The heat source unit (1) includes 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 arranged, a blower room (S2) located above the machine room (S1) where the air heat exchangers (12A, 12B, 12C, 12D) are arranged, a casing (40) extending in a first direction along the horizontal direction, water heat exchangers (31, 32) arranged side by side with the compressors (11A, 11B, 11C, 11D) along the first direction and exchanging heat between the refrigerant of the refrigerant circuit (10) and water, and a support member (50) that extends along the first direction above the bottom plate (44) of the machine room (S1) and supports the refrigerant pipe (RP) connecting the compressors (11A, 11B, 11C, 11D) and the water heat exchangers (31, 32) as pipes to be supported (SP1, SP2, SP3).

[0098] In the conventional configuration, the refrigerant piping of the refrigerant circuit may be installed on the bottom plate of the machinery room. In this configuration, each device such as a compressor, an accumulator, and a subcooling heat exchanger installed in the machinery room interferes with the refrigerant piping, making it difficult to arrange the refrigerant piping. Further, since the degree of freedom in the layout of each device is restricted due to the interference between each device and the refrigerant piping, there arises a problem that the machinery room and further the casing become large-sized.

[0099] On the other hand, in the configuration of the present embodiment, a support member (50) is disposed above the bottom plate (44) of the machinery 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 compressor (11A, 11B, 11C, 11D) and the water heat exchanger (31, 32) as supported pipes (SP1, SP2, SP3). Therefore, it is possible to suppress interference between the refrigerant piping (RP) and each device near the bottom plate (44) of the machinery room (S1). As a result, the refrigerant piping (RP) can be easily arranged. In addition, in the machinery room (S1), since the degree of freedom in the layout of each device such as the compressor (11A, 11B, 11C, 11D), the accumulator (15A, 15B, 15C, 15D), and the subcooling heat exchanger (14A, 14B, 14C, 14D) is improved, the machinery room (S1) can be miniaturized, and further the casing (40) can be miniaturized.

[0100] By suppressing interference between the refrigerant piping (RP) and each device, it is not necessary to provide a cushioning material or the like on the refrigerant piping (RP). Therefore, the number of parts can be reduced.

[0101] Furthermore, since only the refrigerant piping (RP) is supported by the support member (50), the support structure of 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 the 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). Therefore, the configuration regarding the support structure of the refrigerant pipe (RP) can be simplified. Since the support member (50) extends in the first direction, the support member (50) can be used as a beam of the casing (40).

[0104] (8-3) The casing (40) has an outer cover (80) that forms a part of the side surface of the casing (40) along the first direction and is detachably configured on the casing (40). The support member (50) is located inside the outer cover (80).

[0105] In this configuration, by removing the outer cover (80) from the casing (40), an operator can easily access the support member (50). Therefore, the work of supporting the refrigerant pipe (RP) by the support member (50) becomes easier. The outer cover (80) can protect the supported pipes (SP1, SP2, SP3) from rain and wind outside the casing (40).

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

[0107] In this configuration, by making the cross-section of the support member (50) concave, the rigidity of the support member (50) is improved. A space for accommodating the supported pipes (SP1, SP2, SP3) can be secured inside the support member (50). Since the support member (50) opens toward the outer cover (80), after the operator removes the outer cover (80), the operator can easily access the refrigerant pipe (RP).

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

[0109] The liquid pipe has a smaller pipe diameter and lower rigidity compared to the gas pipe. Therefore, when the liquid pipe comes into contact with other equipment, the risk of the liquid pipe being damaged increases. For this reason, in the conventional configuration, it is particularly necessary to increase the clearance between the liquid pipe and the equipment, and as a result, there has been a problem that the degree of freedom in the layout of each piece of equipment is reduced.

[0110] On the other hand, in the configuration of this embodiment, since the support member (50) supports the liquid pipe (21), interference between the liquid pipe (21) and each piece of equipment can be suppressed. As a result, the degree of freedom in the layout of each piece of equipment is improved, so that the machine room (S1), and further the casing (40) can be made particularly compact.

[0111] (8-6) The support member (50) is also disposed below the bottom surface of the blower room (S2) (the upper surface (45a) of the intermediate plate (45)). Therefore, it is possible to prevent the support member (50) from being located at an excessively high position. As a result, the work for an operator to support the refrigerant pipe (RP) by the support member (50) becomes easy.

[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 pipes to be supported (SP1, SP2, SP3) include at least a first pipe to be supported (SP1) that is a pipe to be supported in the first refrigerant circuit (10A) and a second pipe to be supported (SP2) that is a pipe to be supported in the second refrigerant circuit (10B). The support member (50) supports at least the first pipe to be supported (SP1) and the second pipe to be supported (SP2).

[0113] In this configuration, since the support member (50) supports two or more pipes to be supported (SP1, SP2, SP3), the support structure for the plurality of pipes to be supported (SP1, SP2, SP3) can be simplified.

[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 orthogonal to the first direction and along the horizontal direction.

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

[0117] (8-9) It has an inner cover (70) as a shielding member that closes the opening of the concave support member (50). Thereby, the support member (50) and the inner cover (70) can constitute a cylindrical reinforcing member. It is possible to suppress the entry of outdoor air into the inside of the support member (50) and the promotion of dew condensation.

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

[0119] The heat source unit (1) of the embodiment is a cooling-only chiller unit that generates chilled water. However, the heat source unit (1) may be a so-called heat pump type chiller unit that generates both chilled water and hot water. The heat source unit (1) may be a hot water supply heat source unit that generates hot water.

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

[0121] The support member (50) does not necessarily have to be the frame of the casing (40), and it may be a member extending in the first direction above the machine room (S1). When the support member (50) is a frame, the support member (50) may be the second reinforcing frame (FR2) or another horizontal 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 arranged below the support member (50) extending in the first direction, and the supported pipes (SP1, SP2, SP3) may be wound around the support member (50) with a binding band or the like. In this case, the support member (50) supports the supported pipes (SP1, SP2, SP3) from above. The support member (50) may 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 FIG. 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, and for example, it may be a plate-like member extending in the first direction, or a member having a T-shape or an I-shape in a cross-section orthogonal to the first direction. In this case, it is preferable that the support member (50) has a flat surface portion that supports the support member (50) from below.

[0125] When the support member (50) has a concave cross-section, the open portion of the support member (50) may face 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 pipes (SP1, SP2, SP3) may be gas pipes through which a gas 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 a member that is disposed in the blower chamber (S2) and extends in the first direction.

[0128] The plurality of supported pipes (SP1, SP2, SP3) may be arranged side by side, for example, in the vertical direction. In this case, the casing (40) can be downsized in the front-rear direction.

[0129] The support member (50) may not have the lower mounting plate (54) and the upper mounting plate (55) shown in FIG. 9. In this case, the inner cover (70) and the outer cover (80) are detachably attached to frames or outer plates other than the support member (50).

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

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

[0132] Although the embodiments and modification examples have been described above, it will be understood that various changes in form and details are possible without departing from the spirit and scope of the claims. Also, the above embodiments, modification examples, and other embodiments may be appropriately combined or substituted as long as the functions of the object of the present disclosure are not impaired.

[0133] The descriptions such as "first", "second", "third",... described above are used to distinguish the phrases to which these descriptions are given, and do not limit even the number and order of those phrases.

Industrial Applicability

[0134] As described above, the present disclosure is useful for a heat source unit.

Explanation of Signs

[0135] 1 Heat source unit 10 Refrigerant circuit 11A, 11B, 11C, 11D Compressor 12A, 12B, 12C, 12D Air heat exchanger 21 Liquid pipe 31, 32 Water heat exchanger 40 Casing 45a Upper surface (bottom surface) 50 Support member 80 Outer cover (first side plate) 90 Holding member FR1 First reinforcing frame (first frame) P Refrigerant pipe S1 Machine room (first room) S2 Blower room (second room) SP1, SP2, SP3 Piped to be supported

Claims

1. A refrigerant circuit (10) having a compressor (11A, 11B, 11C, 11D) and an air heat exchanger (12A, 12B, 12C, 12D); A first chamber (S1) in which the compressor (11A, 11B, 11C, 11D) is disposed, and a second chamber (S2) located above the first chamber (S1) in which the air heat exchanger (12A, 12B, 12C, 12D) is disposed, and a casing (40) extending in a first direction along the horizontal direction; A water heat exchanger (31, 32) disposed so as to be aligned with the compressor (11A, 11B, 11C, 11D) along the first direction, for exchanging heat between the refrigerant of the refrigerant circuit (10) and water; A support member (50) that supports a refrigerant pipe (RP) that extends along the first direction above the bottom surface (45a) of the first chamber (S1) and connects the compressor (11A, 11B, 11C, 11D) and the water heat exchanger (31, 32) as a supported pipe (SP1, SP2, SP3); A heat source unit comprising. Heat source unit.

2. 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 heat source unit according to claim 1.

3. The casing (40) has a first side plate (80) that forms a part of a side surface of the casing (40) along the first direction and is detachably configured on the casing (40); The first frame (FR1) is located inside the first side plate (80); The heat source unit according to claim 2.

4. When viewed in a cross section perpendicular to the first direction, the first frame (FR1) has a concave shape that opens toward the first side plate (80); The supported pipes (SP1, SP2, SP3) are disposed inside the first frame (FR1); The heat source unit according to claim 2.

5. The supported pipes (SP1, SP2, SP3) are liquid pipes through which the liquid refrigerant of the refrigerant circuit (10) flows; The heat source unit according to any one of claims 1 to 4.

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

7. The refrigerant circuit (10) is: A first refrigerant circuit (10A) having a first compressor (11A) and a first air heat exchanger (12A); including a second refrigerant circuit (10B) having a second compressor (11B) and a second air heat exchanger (12B); the supported pipes (SP1, SP2, SP3) are a first supported pipe (SP1) that is a supported pipe of the first refrigerant circuit (10A), and a second supported pipe (SP2) that is a supported pipe of the second refrigerant circuit (10B), the support member (50) supports the first supported pipe (SP1) and the second supported pipe (SP2). The heat source unit according to any one of claims 1 to 4.

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

9. further comprising a holding member (90) that holds both the first supported pipe (SP1) and the second supported pipe (SP2) with a predetermined interval therebetween The heat source unit according to claim 7.

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