Heat source unit

Abstract

To improve maintainability of a heat source unit.SOLUTION: A heat source unit (1) includes: a plurality of housing parts (42) arranged side by side; and air heat exchangers(12A, 12B, 12C, 12D) provided at each of the plurality of housing parts (42). A first housing part (42A) which is the housing part (42) of any one of the plurality of housing parts (42) includes a first partition plate (Fe2) which includes a first plate part (Fe21) and a second plate part (Fe22). The first plate part (Fe21) opposes to a second direction perpendicular with respect to a first direction which is the direction in which the plurality of housing parts (42) is arrayed with respect to an internal space (S2A) of the first housing part (42A), and is fastened to frames (Fa5, Fa6) of the first housing part (42A). The second plate part (Fe22) opposes to the first direction with respect to the internal space (S2A) of the first housing part (42A).SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to a heat source unit.

Background Art

[0002] A heat source unit for generating cold water is known.

[0003] The heat source unit of Patent Document 1 includes an air heat exchanger that exchanges heat between a refrigerant and outside air, a housing portion where the air heat exchanger is provided, a refrigerant circuit that performs a refrigeration cycle, and a water heat exchanger that exchanges heat between the refrigerant in the refrigerant circuit and water. In the heat source unit of Patent Document 1, a plurality of housing portions are arranged side by side.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When removing the partition plate, which is an outer plate, from the housing portion to perform maintenance inside the housing portion, the adjacent housing portion gets in the way, and the operation of removing the partition plate from the housing portion becomes complicated, which may reduce the maintainability of the heat source unit.

[0006] The present disclosure aims to improve the maintainability.

Means for Solving the Problems

[0007] The first aspect is directed to a heat source unit. The heat source unit includes a plurality of housing parts (42) arranged side by side, and air heat exchangers (12A, 12B, 12C, 12D) provided in each of the plurality of housing parts (42). Among the plurality of housing parts (42), a first housing part (42A) includes a first partition plate (Fe2) including a first plate part (Fe21) and a second plate part (Fe22). The first plate part (Fe21) faces the internal space (S2A) of the first housing part (42A) in a second direction perpendicular to a first direction which is the direction in which the plurality of housing parts (42) are arranged, and is fastened to the frames (Fa5, Fa6) of the first housing part (42A). The second plate part (Fe22) faces the internal space (S2A) of the first housing part (42A) in the first direction.

[0008] In the first aspect, when removing the first partition plate (Fe2) from the first housing part (42A) to perform maintenance work on the internal space (S2A) of the first housing part (42A), since the first plate part (Fe21) faces the internal space (S2A) in the second direction, the removal work of the first partition plate (Fe2) can be performed from the second direction side. Thereby, it is possible to suppress interference with an adjacent housing part (42) adjacent along the first direction during the removal work of the first partition plate (Fe2), and the maintainability can be improved.

[0009] The second aspect is, in the first aspect, the second plate part (Fe22) has a shape extending from the first plate part (Fe21) to one direction side in the second direction, and the first plate part (Fe21) is detachably fastened to the frames (Fa5, Fa6) of the first housing part (42A) from the other direction side in the second direction.

[0010] In the second aspect, when attaching or detaching the first plate portion (Fe21) of the first partition plate (Fe2) to or from the frames (Fa5, Fa6) of the first housing portion (42A), the first plate portion (Fe21) can be attached or detached from the other direction side in the second direction. Therefore, it is possible to suppress interference from the adjacent housing portion (42) adjacent along the first direction, and the first plate portion (Fe21) can be easily attached or detached.

[0011] The third aspect is that in the first aspect or the second aspect, a fan (5A, 5B) is provided on one direction side in a third direction perpendicular to the first direction and the second direction with respect to the internal space (S2A). The first housing portion (42A) includes a column portion (Fc2) that supports the fan (5A, 5B) or a housing (43A) in which the fan (5A, 5B) is accommodated from the other direction side in the third direction. The second plate portion (Fe22) is attached to the column portion (Fc2).

[0012] In the third aspect, by attaching the second plate portion (Fe22) to the column portion (Fc2) and bringing the column portion (Fc2) into contact with the second plate portion (Fe22), the internal space (S2A) of the first housing portion (42A) can be partitioned from the outside of the first housing portion (42A) by the column portion (Fc2) and the second plate portion (Fe22).

[0013] The fourth aspect is that in the third aspect, the second plate portion (Fe22) faces the column portion (Fc2) in the second direction. On the surface of the second plate portion (Fe22) that faces the column portion (Fc2), a first engaging portion (Fe22c) is provided. On the surface of the column portion (Fc2) that faces the second plate portion (Fe22), a second engaging portion (Fc21) that engages with the first engaging portion (Fe22c) is provided.

[0014] In the fourth aspect, by engaging the first engaging portion (Fe22c) with the second engaging portion (Fc21), the second plate portion (Fe22) can be attached to the column portion (Fc2).

[0015] In the fifth aspect, in the third or fourth aspect, the air heat exchanger (12A) of the first housing part (42A) is inclined with respect to the third direction, and the first plate part (Fe21) of the first partition plate (Fe2) extends along the inclination direction of the air heat exchanger (12A) of the first housing part (42A).

[0016] In the fifth aspect, the first plate part (Fe21) of the first partition plate (Fe2) can be fastened to the first housing part (42A) so as to follow the inclination of the air heat exchanger (12A).

[0017] In the sixth aspect, in the fifth aspect, the column part (Fc2) has a shape extending along the third direction, and the dimension in the second direction of the second plate part (Fe22) becomes smaller as it goes toward the other direction side in the third direction.

[0018] In the sixth aspect, the second plate part (Fe22) can be attached to the column part (Fc2) so that the surface of the second plate part (Fe22) facing the column part (Fc2) follows the column part (Fc2).

[0019] In the seventh aspect, in any one of the third to sixth aspects, the air heat exchanger (12A) of the first housing part (42A), the first partition plate (Fe2), and the column part (Fc2) are arranged in this order of the air heat exchanger (12A) of the first housing part (42A), the first partition plate (Fe2), and the column part (Fc2) along the first direction.

[0020] In the seventh aspect, in the first direction, by ensuring a space between the first partition plate (Fe2) and the adjacent housing part (42) so that the first partition plate (Fe2) is not located outside (on the side of the adjacent housing part (42)) of the column part (Fc2), a working space for the attachment / detachment operation of the first partition plate (Fe2) can be effectively ensured.

[0021] In the eighth aspect, in any one of the first to seventh aspects, the air heat exchangers (12A, 12B, 12C, 12D) have an L shape.

[0022] In the eighth aspect, heat exchange between the refrigerant and air can be performed using an L-shaped air heat exchanger.

[0023] The ninth aspect is that in any one of the first to eighth aspects, a thermistor disposed in the internal space (S2A) of the first housing portion (42A) is provided, and the thermistor is located at a place visible from the outside of the first housing portion (42A) in a state where the first partition plate (Fe2) is removed from the first housing portion (42A).

[0024] In the ninth aspect, the maintainability of the thermistor can be improved.

[0025] The tenth aspect is that in any one of the first to ninth aspects, the plurality of housing portions (42) includes a second housing portion (42B) adjacent to the first housing portion (42A) in the first direction, and the second housing portion (42B) has a second partition plate (Fe1) facing the internal space (S2B) of the second housing portion (42B) and facing the first direction and the second direction, and the first partition plate (Fe2) and the second partition plate (Fe1) face each other in the first direction.

[0026] In the tenth aspect, even when the first partition plate (Fe2) and the second partition plate (Fe1) face each other in the first direction, since the first partition plate (Fe2) (the first plate portion (Fe21)) can be attached and detached from the other direction side in the second direction, it is possible to suppress interference with the second partition plate (Fe1) when the first partition plate (Fe2) is attached and detached, and the maintainability can be improved.

[0027] The eleventh aspect is that in any one of the first to tenth aspects, the first plate portion (Fe21) forms an air suction port (I1) to the internal space (S2A) of the first housing portion (42A).

[0028] In the 11th aspect, since the first plate portion (Fe21) and the suction port (I1) are adjacent to each other, maintenance around the suction port (I1) can be easily performed by removing the first partition plate (Fe2) from the first housing portion (42A).

[0029] The 12th aspect is any one of the 1st to 11th aspects, wherein the first partition plate (Fe2) is located on the movement locus of the maintenance part when taking out the maintenance part arranged in the internal space (S2A) of the first housing part (42A) to the outside of the first housing part (42A).

[0030] In the 12th aspect, the maintenance part can be easily taken out from the internal space (S2A) of the first housing part (42A) by removing the first partition plate (Fe2).

Brief Description of the Drawings

[0031]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

DETAILED DESCRIPTION OF THE INVENTION

[0032] 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.

[0033] (1) Overview The heat source unit (1) according to the present embodiment is used as a 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.

[0034] (2) Configuration of 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 illustrations 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 refrigeration cycle by circulating the refrigerant.

[0035] 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).

[0036] The first compressor (11A) compresses the inhaled refrigerant and discharges the compressed refrigerant. The first compressor (11A) is, for example, a scroll compressor, but it 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) of 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).

[0037] 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 first subcooling heat exchanger (14A) in the injection pipe (22). 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).

[0038] 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).

[0039] The second refrigerant circuit (10B) mainly has a second compressor (11B), a second air heat exchanger (12B), and a second expansion valve (13B). The second refrigerant circuit (10B) has 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 inflow 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 outflow end of the second refrigerant flow path (R2) of the first water heat exchanger (31) and the second accumulator (15B).

[0040] 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) also 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).

[0041] 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) also 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).

[0042] (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-type 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 type heat exchangers.

[0043] 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).

[0044] 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).

[0045] (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.

[0046] (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 is expanded.

[0047] The casing (40) has a lower housing part (41) and an upper housing part (42). The upper housing part (42) is an example of a housing part. 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). A machine room (S1) is formed inside the lower housing part (41). A blower room (S2) is formed inside the upper housing part (42). 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).

[0048] 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 struts 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.

[0049] As shown in FIGS. 2 to 4, the lower housing part (41) has, as frames, 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 the longitudinal direction. The first horizontal frame (Fa1) is located at the lower end of the front surface of the lower housing part (41). The second horizontal frame (Fa2) is located at the upper end of the front surface of the lower housing part (41). The third horizontal frame (Fa3) is located at the lower end of the rear surface of the lower housing part (41). The fourth horizontal frame (Fa4) is located at the upper end of the rear surface of the lower housing part (41).

[0050] The lower housing part (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 across 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 across from the first horizontal frame (Fa1) to the second horizontal frame (Fa2).

[0051] The lower housing part (41) has, as an outer plate, a plurality of lower front plates (P1) and a plurality of lower rear plates (P2). The lower front plate (P1) and the lower rear plate (P2) are formed in a rectangular plate shape. The lower front plate (P1) is located on the front surface of the lower housing part (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 part (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).

[0052] The upper housing part (42) includes a plurality of housing parts. The plurality of housing parts are arranged side by side along the left - right direction. Each of the plurality of housing parts has the same structure as each other. In the present embodiment, the plurality of housing parts include a first housing part (42A) and a second housing part (42B). The second housing part (42B) is arranged on the right side of the first housing part (42A). Hereinafter, the internal space of the first housing part (42A) may be described as the first blower chamber (S2A), and the internal space of the second housing part (42B) may be described as the second blower chamber (S2B). The first blower chamber (S2A) is the left - hand part of the blower chamber (S2), and the second blower chamber (S2B) is the right - hand part of the blower chamber (S2).

[0053] At the front of the first housing part (42A), a first suction port (I1) that communicates the first blower chamber (S2A) with the outside of the first housing part (42A) is formed. A first air heat exchanger (12A) is disposed at the first suction port (I1). At the front of the second housing part (42B), a second suction port (I2) that communicates the second blower chamber (S2B) with the outside of the second housing part (42B) is formed. A second air heat exchanger (12B) is disposed at the second suction port (I2). At the rear of the first housing part (42A), a third suction port (I3) that communicates the first blower chamber (S2A) with the outside of the first housing part (42A) is formed. A third air heat exchanger (12C) is disposed at the third suction port (I3). At the rear of the second housing part (42B), a fourth suction port (I4) that communicates the second blower chamber (S2B) with the outside of the second housing part (42B) is formed. A fourth air heat exchanger (12D) is disposed at the fourth suction port (I4).

[0054] 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 part (41) and the upper housing part (42). These reinforcing frames extend along the left-right direction (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 part (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 part (42).

[0055] As shown in FIGS. 2 to 4, the casing (40) has an upper cover (43) that constitutes its upper part. The upper cover (43) is formed in a hollow square column shape with an open bottom. A plurality of air outlets are formed on the upper surface of the upper cover (43). Each air outlet is formed in a circular shape. The plurality of air outlets are arranged side by side in the first direction. On the upper surface of the upper cover (43) in 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 the left end to the right end.

[0056] 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).

[0057] 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). The intermediate plate (45) includes a first intermediate plate (45A) and a second intermediate plate (45B). The first intermediate plate (45A) is the left side portion of the intermediate plate (45). The second intermediate plate (45B) is the right side portion of the intermediate plate (45).

[0058] 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 room (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.

[0059] The upper cover (43) forms a housing that houses the first fan (5A), the second fan (5B), the third fan (5C), and the fourth fan (5D). The upper cover (43) includes a first upper cover (43A) that houses the first fan (5A) and the second fan (5B), and a second upper cover (43B) that houses the third fan (5C) and the fourth fan (5D). The second upper cover (43B) is disposed on the right side of the first upper cover (43A). On the upper surface of the first upper cover (43A), a first air outlet (O1) and a second air outlet (O2) are formed, and on the upper surface of the second upper cover (43B), a third air outlet (O3) and a fourth air outlet (O4) are formed. The first upper cover (43A) is disposed above the first housing portion (42A) and is fixed to the first housing portion (42A). The internal space of the first upper cover (43A) communicates with the first blower chamber (S2A). The second upper cover (43B) is disposed above the second housing portion (42B) and is fixed to the second housing portion (42B). The internal space of the second upper cover (43B) communicates with the second blower chamber (S2B).

[0060] (4-2) Configuration of Each Device in the Machine Room As shown in FIG. 7, in the machine room (S1), the first unit (U1), the second unit (U2), the third unit (U3), and the fourth unit (U4) are arranged in order from the left side to the right side. 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).

[0061] 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 in the second direction of the casing (40). 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 rotational 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).

[0062] 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.

[0063] 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 at 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).

[0064] (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 then is sucked into the first compressor (11A).

[0065] In the second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D), the same refrigeration cycle is performed.

[0066] 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 cold heat source for air conditioning.

[0067] (6) First housing part The first housing part (42A) will be described.

[0068] As shown in FIGS. 2 to 4, the first housing part (42A) has, as a frame, a fifth horizontal frame (Fa5) and a sixth horizontal frame (Fa6). The fifth horizontal frame (Fa5) is located at the lower end of the first housing part (42A) and is provided on the first intermediate plate (45A). The fifth horizontal frame (Fa5) includes a pair of long plate-shaped members extending in the front-rear direction and a pair of long plate-shaped members extending in the left-right direction. The plurality of long plate-shaped members constituting the fifth horizontal frame (Fa5) are arranged in a rectangular ring shape along the edge of the first intermediate plate (45A). The sixth horizontal frame (Fa6) is located at the upper end of the first housing part (42A) and is fixed to the first upper cover (43A). The sixth horizontal frame (Fa6) includes a pair of long plate-shaped members extending in the front-rear direction and a pair of long plate-shaped members extending in the left-right direction. The plurality of long plate-shaped members constituting the sixth horizontal frame (Fa6) are arranged in a rectangular ring shape along the outer shape of the opening at the lower end of the first housing part (42A).

[0069] As shown in FIGS. 2, 5, and 8, the first housing part (42A) has, as a frame, a plurality of column parts (Fc) and a plurality of support frames (Fd). The lower ends of each of the plurality of column parts (Fc) and the plurality of support frames (Fd) are fixed to the fifth horizontal frame (Fa5), and the upper ends of each of the plurality of column parts (Fc) and the plurality of support frames (Fd) are fixed to the sixth horizontal frame (Fa6).

[0070] The plurality of pillar portions (Fc) are interposed between the first upper cover (43A) and the lower housing portion (41) located below the first upper cover (43A) to support the first upper cover (43A) from below. Supporting from below is an example of supporting from the other direction side in the third direction. The plurality of pillar portions (Fc) include a first pillar portion (Fc1), a second pillar portion (Fc2) disposed to the right of the first pillar portion (Fc1), a third pillar portion (Fc3) disposed behind the first pillar portion (Fc1), and a fourth pillar portion (Fc4) disposed behind the second pillar portion (Fc2) and to the right of the third pillar portion (Fc3).

[0071] As shown in FIG. 8, the plurality of support frames (Fd) include a first support frame (Fd1), a second support frame (Fd2) disposed to the right of the first support frame (Fd1), a third support frame (Fd3) disposed behind the first support frame (Fd1), and a fourth support frame (Fd4) disposed behind the second support frame (Fd2) and to the right of the third support frame (Fd3). The first support frame (Fd1) and the second support frame (Fd2) are disposed between a first column portion (Fc1) and a second column portion (Fc2), and are inclined forward with respect to the upward direction. Inclining forward with respect to the upward direction means that it is inclined such that the upper end is positioned more forward than the lower end. A first suction port (I1) is formed between the first support frame (Fd1) and the second support frame (Fd2), and a first air heat exchanger (12A) is disposed at the first suction port (I1). The first air heat exchanger (12A) is inclined forward with respect to the upward direction so as to have the same inclination angle as the first support frame (Fd1) and the second support frame (Fd2). The third support frame (Fd3) and the fourth support frame (Fd4) are disposed between a third column portion (Fc3) and a fourth column portion (Fc4), and are inclined rearward with respect to the upward direction. Inclining rearward with respect to the upward direction means that it is inclined such that the upper end is positioned more rearward than the lower end. A third suction port (I3) is formed between the third support frame (Fd3) and the fourth support frame (Fd4), and a third air heat exchanger (12C) is disposed at the third suction port (I3). The third air heat exchanger (12C) is inclined rearward with respect to the upward direction so as to have the same inclination angle as the third support frame (Fd3) and the fourth support frame (Fd4).

[0072] As shown in FIGS. 2 to 5 and FIG. 8, the first housing part (42A) has, as an outer plate, a plurality of partition plates (Fe) and a plurality of side plates (Ff). The lower ends of each of the plurality of partition plates (Fe) and the plurality of side plates (Ff) are fixed to the fifth horizontal frame (Fa5), and the upper ends of each of the plurality of partition plates (Fe) and the plurality of side plates (Ff) are fixed to the sixth horizontal frame (Fa6). The partition plate (Fe) covers the corner of the first blower chamber (S2A). The side plate (Ff) covers the side of the first blower chamber (S2A). The side plate (Ff) is disposed between the first blower chamber (S2A) and the second blower chamber (S2B) to partition the first blower chamber (S2A) and the second blower chamber (S2B).

[0073] The plurality of partition plates (Fe) includes a first partition plate (Fe1) that covers the gap formed between the first column part (Fc1) and the first support frame (Fd1), a second partition plate (Fe2) that covers the gap formed between the second column part (Fc2) and the second support frame (Fd2), a third partition plate (Fe3) that covers the gap formed between the third column part (Fc3) and the third support frame (Fd3), and a fourth partition plate (Fe4) that covers the gap formed between the fourth column part (Fc4) and the fourth support frame (Fd4).

[0074] As shown in FIGS. 8 and 9, the first partition plate (Fe1) is disposed at the left front corner of the first blower chamber (S2A). The first partition plate (Fe1) is disposed across from the first column portion (Fc1) to the first support frame (Fd1). The first partition plate (Fe1) includes a first plate portion (Fe11) and a second plate portion (Fe12) continuous with the first plate portion (Fe11), and has a shape that bends or curves at the location where the first plate portion (Fe11) and the second plate portion (Fe12) are continuous. The first plate portion (Fe11) projects leftward from the first support frame (Fd1). The first plate portion (Fe11) includes a plate surface (Fe11a) facing the first blower chamber (S2A) while facing rearward. The first plate portion (Fe11) is inclined forward with respect to the upward direction so as to have the same inclination angle as the first air heat exchanger (12A). The second plate portion (Fe12) projects rearward from the left end of the first plate portion (Fe11). The second plate portion (Fe12) includes a plate surface (Fe12a) facing the first blower chamber (S2A) while facing rightward. The second plate portion (Fe12) has a smaller dimension in the front-rear direction as it goes downward. The downward direction is an example of the other direction side of the third direction. The rear edge portion (Fe12b) of the second plate portion (Fe12) extends along the vertical direction. A first engaging portion (Fe12c) is provided at the edge portion (Fe12b) of the second plate portion (Fe12). The first engaging portion (Fe12c) is, for example, a protrusion, and a plurality (three in this embodiment) are provided so as to be arranged along the vertical direction. Further, a second engaging portion (Fc11) that engages with the first engaging portion (Fe12c) is provided on the surface of the first column portion (Fc1) that faces the second plate portion (Fe12). The second engaging portion (Fc11) is, for example, a hole into which the first engaging portion (Fe12c) that is a protrusion can be inserted.

[0075] As shown in FIGS. 8 and 10, the second partition plate (Fe2) has a shape symmetric to the left and right with respect to the first partition plate (Fe1). The second partition plate (Fe2) is disposed at the right front corner of the first blower chamber (S2A). The second partition plate (Fe2) is disposed from the second column portion (Fc2) to the second support frame (Fd2). The second partition plate (Fe2) includes a first plate portion (Fe21) and a second plate portion (Fe22) continuous with the first plate portion (Fe21), and has a shape that bends or curves at the location where the first plate portion (Fe21) and the second plate portion (Fe22) are continuous. The first plate portion (Fe21) protrudes rightward from the second support frame (Fd2). The first plate portion (Fe21) includes a plate surface (Fe21a) facing the first blower chamber (S2A) while facing rearward. The first plate portion (Fe21) is inclined forward with respect to the upward direction so as to have the same inclination angle as the first air heat exchanger (12A). The second plate portion (Fe22) protrudes rearward from the right end of the first plate portion (Fe21). The second plate portion (Fe22) includes a plate surface (Fe22a) facing the first blower chamber (S2A) while facing leftward. The second plate portion (Fe22) has a smaller dimension in the front-rear direction as it goes downward. The rear edge portion (Fe22b) of the second plate portion (Fe22) extends along the vertical direction. A first engaging portion (Fe22c) is provided at the edge portion (Fe22b) of the second plate portion (Fe22). Further, a second engaging portion (Fc21) that engages with the first engaging portion (Fe22c) is provided on the surface of the second column portion (Fc2) facing the second plate portion (Fe22).

[0076] As shown in FIG. 8, the third partition plate (Fe3) is a member having the same shape as the second partition plate (Fe2) (see FIG. 10), and is arranged in the reverse front-back direction compared to the second partition plate (Fe2). The third partition plate (Fe3) is arranged at the left rear corner of the first blower chamber (S2A). The third partition plate (Fe3) is arranged from the third column portion (Fc3) to the third support frame (Fd3). The third partition plate (Fe3) includes a first plate portion (Fe31) and a second plate portion (Fe32) connected to the first plate portion (Fe31), and has a shape that bends or curves at the location where the first plate portion (Fe31) and the second plate portion (Fe32) are connected. The first plate portion (Fe31) includes a plate surface (Fe31a) facing the first blower chamber (S2A) while facing forward, and is inclined rearward with respect to the upward direction so as to have the same inclination angle as the third air heat exchanger (12C). The second plate portion (Fe32) includes a plate surface (Fe32a) facing the first blower chamber (S2A) while facing rightward, and the dimension in the front-back direction becomes smaller as it goes downward. A first engaging portion is provided at the front edge of the second plate portion (Fe32). Further, a second engaging portion that engages with the first engaging portion of the third partition plate (Fe3) is provided on the surface of the third column portion (Fc3) facing the second plate portion (Fe32).

[0077] As shown in Fig. 8, the fourth partition plate (Fe4) is a member having the same shape as the first partition plate (Fe1) (see Fig. 9), and is arranged in the reverse front-back direction compared to the first partition plate (Fe1). The third partition plate (Fe3) is arranged at the right rear corner of the first blower chamber (S2A). The fourth partition plate (Fe4) is arranged across the fourth column portion (Fc4) and the fourth support frame (Fd4). The fourth partition plate (Fe4) includes a first plate portion (Fe41) and a second plate portion (Fe42) continuous with the first plate portion (Fe41), and has a shape that bends or curves at the location where the first plate portion (Fe41) and the second plate portion (Fe42) are continuous. The first plate portion (Fe41) includes a plate surface (Fe41a) facing the first blower chamber (S2A) while facing forward, and is inclined rearward with respect to the upward direction so as to have the same inclination angle as the third air heat exchanger (12C). The second plate portion (Fe42) includes a plate surface (Fe42a) facing the first blower chamber (S2A) while facing leftward, and the dimension in the front-back direction becomes smaller as it goes downward. A first engaging portion is provided at the front edge portion of the second plate portion (Fe42). Further, a second engaging portion that engages with the first engaging portion of the fourth partition plate (Fe4) is provided on the surface of the fourth column portion (Fc4) that faces the second plate portion (Fe42).

[0078] As shown in Fig. 8, the plurality of side plates (Ff) include a first side plate (Ff1) that covers the gap formed between the first column portion (Fc1) and the third column portion (Fc3), and a second side plate (Ff2) that covers the gap formed between the second column portion (Fc2) and the fourth column portion (Fc4). The first side plate (Ff1) is a flat plate-like member provided across the first column portion (Fc1) and the third column portion (Fc3). The second side plate (Ff2) is a flat plate-like member provided across the second column portion (Fc2) and the fourth column portion (Fc4).

[0079] (7) The second housing portion Regarding the second housing portion (42B), the differences from the first housing portion (42A) will be described.

[0080] As shown in FIGS. 2 and 8, the second housing part (42B) includes, as a frame, a fifth horizontal frame (Fa5), a sixth horizontal frame (Fa6), a plurality of pillar parts (Fc) (a first pillar part (Fc1), a second pillar part (Fc2), a third pillar part (Fc3), and a fourth pillar part (Fc4)), and a plurality of support frames (Fd) (a first support frame (Fd1), a second support frame (Fd2), a third support frame (Fd3), and a fourth support frame (Fd4)). The second housing part (42B) includes, as outer plates, a plurality of partition plates (Fe) (a first partition plate (Fe1), a second partition plate (Fe2), a third partition plate (Fe3), and a fourth partition plate (Fe4)), and a plurality of side plates (Ff) (a first side plate (Ff1) and a second side plate (Ff2)).

[0081] In the second housing part (42B), the fifth horizontal frame (Fa5) is located at the lower end of the second housing part (42B) and is provided on the second intermediate plate (45B) along the edge of the second intermediate plate (45B), which is different from the first housing part (42A). In the second housing part (42B), the sixth horizontal frame (Fa6) is located at the upper end of the second housing part (42B) and is fixed to the second upper cover (43B), which is different from the first housing part (42A).

[0082] In the second housing part (42B), a plurality of pillar parts (Fc) are interposed between the second upper cover (43B) and the lower housing part (41), so that the point of supporting the second upper cover (43B) from below is different from that of the first housing part (42A). In the second housing part (42B), a second suction port (I2) is formed between the first support frame (Fd1) and the second support frame (Fd2), and a second air heat exchanger (12B) is arranged at the second suction port (I2), which is different from the first housing part (42A). The second air heat exchanger (12B) is inclined forward with respect to the upward direction so as to have the same inclination angle as the first support frame (Fd1) and the second support frame (Fd2). In the second housing part (42B), a fourth suction port (I4) is formed between the third support frame (Fd3) and the fourth support frame (Fd4), and a fourth air heat exchanger (12D) is arranged at the fourth suction port (I4), which is different from the first housing part (42A). The fourth air heat exchanger (12D) is inclined backward with respect to the upward direction so as to have the same inclination angle as the third support frame (Fd3) and the fourth support frame (Fd4).

[0083] In the second housing part (42B), the partition plate (Fe) covers the corner of the second blower chamber (S2B), and the side plate (Ff) covers the side of the second blower chamber (S2B), which is different from the first housing part (42A). In the second housing part (42B), the first partition plate (Fe1) is arranged at the left front corner of the second blower chamber (S2B), the second partition plate (Fe2) is arranged at the right front corner of the second blower chamber (S2B), the third partition plate (Fe3) is arranged at the left rear corner of the second blower chamber (S2B), and the second partition plate (Fe2) is arranged at the right rear corner of the second blower chamber (S2B), which is different from the first housing part (42A). In the second housing part (42B), the plate surfaces (Fe11a, Fe21a, Fe21a, Fe21a) of the first plate parts (Fe11, Fe21, Fe31, Fe41) and the plate surfaces (Fe12a, Fe22a, Fe32a, Fe42a) of the second plate parts (Fe12, Fe22, Fe32, Fe42) face the second blower chamber (S2B), which is different from the first housing part (42A).

[0084] (8) Fastening structure of the partition plate As shown in FIGS. 2 to 4 and FIG. 8, for each of the first housing portion (42A) and the second housing portion (42B), the first plate portion (Fe11) of the first partition plate (Fe1) and the first plate portion (Fe21) of the second partition plate (Fe2) are detachably fastened (fixed) to the frames (Fa5, Fa6) from the front side. The front side is an example of the other side in the second direction. For each of the first housing portion (42A) and the second housing portion (42B), the first plate portion (Fe31) of the third partition plate (Fe3) and the first plate portion (Fe41) of the fourth partition plate (Fe4) are detachably fastened to the frames (Fa5, Fa6) from the rear side.

[0085] (8-1) Fastening procedure of the second partition plate in the first housing portion As shown in FIG. 11, first, in the first housing portion (42A), the second partition plate (Fe2) is arranged at a predetermined position (the right front corner in the first blower chamber (S2A)). At this time, the operator holds the second partition plate (Fe2) from the front side of the first housing portion (42A) to the predetermined position, and pushes the second partition plate (Fe2) backward toward the second column portion (Fc2) so that the first engaging portion (Fe22c) which is a protrusion is inserted into the second engaging portion (Fc21) which is a hole, thereby engaging the first engaging portion (Fe22c) with the second engaging portion (Fc21). When the first engaging portion (Fe22c) is engaged with the second engaging portion (Fc21), the second plate portion (Fe22) of the second partition plate (Fe2) is attached to the second column portion (Fc2), and the second partition plate (Fe2) is positioned with respect to the second column portion (Fc2).

[0086] As shown in FIG. 12, next, in the first housing part (42A), the first plate part (Fe21) of the second partition plate (Fe2) is fastened to the frames (Fa5, Fa6) by fastening members (G1, G2) such as screws and bolts. At this time, the operator inserts the fastening member (G1) while rotating it from the front side of the first housing part (42A) with respect to the upper part of the first plate part (Fe21) and the fifth horizontal frame (Fa5), thereby fastening the upper part of the first plate part (Fe21) and the fifth horizontal frame (Fa5) with the fastening member (G1). Further, with respect to the lower part of the first plate part (Fe21) and the sixth horizontal frame (Fa6), the operator inserts the fastening member (G2) while rotating it from the front side of the first housing part (42A), thereby fastening the lower part of the first plate part (Fe21) and the sixth horizontal frame (Fa6) with the fastening member (G2).

[0087] Note that when the fastening member (G1) is rotated from the front side in the direction opposite to the direction when the first plate part (Fe21) is fastened to the frames (Fa5, Fa6), the first plate part (Fe21) is removed from the frames (Fa5, Fa6). The first plate part (Fe21) is provided with a fastening part that can be attached to and detached from the frames (Fa5, Fa6) from the front side of the first housing part (42A). As shown in FIG. 12, the fastening part is a location where the first plate part (Fe21) is detachably fastened to the frames (Fa5, Fa6) (the location fastened by the fastening members (G1, G2)), and is located at the front part of the first housing part (42A). Further, after the first plate part (Fe21) is removed from the frames (Fa5, Fa6), the second partition plate (Fe2) is pulled backward, so that the engagement between the first engaging part (Fe22c) and the second engaging part (Fc21) is released, and the second partition plate (Fe2) is removed from the first housing part (42A). From the above, the second partition plate (Fe2) can be attached to and detached from the first housing part (42A) from the front side (the other direction side in the second direction) of the first housing part (42A).

[0088] (8-2) Fastening Procedure of the First Partition Plate in the Second Housing Part As shown in FIG. 13, first, in the second housing portion (42B), the first partition plate (Fe1) is arranged at the left front corner of the second blower chamber (S2B) such that the first engaging portion (Fe12c) (see FIG. 9) of the first partition plate (Fe1) engages with the second engaging portion (Fc11) of the first column portion (Fc1). As shown in FIG. 14, next, the upper part of the first plate portion (Fe11) of the first partition plate (Fe1) and the fifth horizontal frame (Fa5) are fastened by a fastening member (G3), and further, the lower part of the first plate portion (Fe11) and the sixth horizontal frame (Fa6) are fastened by a fastening member (G4).

[0089] (9) Effect As described above, the first plate portions (Fe11, Fe12, Fe13, Fe14) of the first housing portion (42A) face the first blower chamber (S2A) of the first housing portion (42A) in the front-rear direction (second direction). The second plate portions (Fe21, Fe22, Fe22, Fe23) of the first housing portion (42A) face the first blower chamber (S2A) of the first housing portion (42A) in the left-right direction (first direction). The first plate portions (Fe11, Fe12, Fe13, Fe14) are fastened to the frames (Fa5, Fa6) of the first housing portion (42A). According to this, when removing the first plate portions (Fe11, Fe12, Fe13, Fe14) from the frames (Fa5, Fa6), the removal work can be performed from the front side of the first housing portion (42A). Therefore, it is possible to prevent the adjacent housing portion (42) from interfering during the removal work of the first plate portions (Fe11, Fe12, Fe13, Fe14). As a result, the first plate portions (Fe11, Fe12, Fe13, Fe14) can be easily removed from the frames (Fa5, Fa6). Further, after removing the first plate portions (Fe11, Fe12, Fe13, Fe14) from the frames (Fa5, Fa6) and moving the partition plates (Fe1, Fe2, Fe3, Fe4), access can be made to the inside of the first housing portion (42A) through the opening (Fg) formed at the location where the partition plates (Fe1, Fe2, Fe3, Fe4) were located in the first housing portion (42A), and maintenance work on various devices installed inside the first housing portion (42A) can be easily performed. Thus, the maintainability of the heat source unit (1) can be improved. Regarding the front side of the first housing portion (42A), when removing the first plate portions (Fe11, Fe12) from the frames (Fa5, Fa6), the front side indicates the front side, and when removing the first plate portions (Fe13, Fe14) from the frames (Fa5, Fa6), the front side indicates the rear side.

[0090] In addition, since the partition plates (Fe1, Fe2, Fe3, Fe3) can partition the connection part of the adjacent housing parts (42A, 42B) by the second plate parts (Fe12, Fe22, Fe32, Fe42), there is no need to separately provide a member for partitioning the connection part of the adjacent housing parts (42A, 42B). As a result, an increase in the manufacturing cost of the heat source unit (1) can be suppressed. Further, since the first partition plate (Fe2) and the fourth partition plate (Fe4) have the same shape, and the second partition plate (Fe2) and the third partition plate (Fe3) have the same shape, members of the same shape can be used, so an increase in the manufacturing cost of the heat source unit (1) can be suppressed. Also, since the first partition plate (Fe2) and the second partition plate (Fe2) are detachable from the front side, and the third partition plate (Fe3) and the fourth partition plate (Fe4) are detachable from the rear side, when removing the partition plates (Fe1, Fe2, Fe3, Fe3) for maintenance work, there is no need to access a narrow place such as between the first housing part (42A) and the second housing part (42B) arranged side by side in the left - right direction. As a result, the maintainability can be improved.

[0091] Also, the first air heat exchanger (12A) of the first housing part (42A), the second partition plate (Fe2), and the second column part (Fc2) are arranged in the order of the first air heat exchanger (12A), the second partition plate (Fe2), and the second column part (Fc2) of the first housing part (42A) along the left - right direction. Thereby, by attaching the second partition plate (Fe2) to the second column part (Fc2), in the left - right direction, it is possible to prevent the second partition plate (Fe2) from being located outside (on the side of the adjacent housing part (42)) of the second column part (Fc2). As a result, it is possible to suppress the adjacent housing part (42) from getting in the way during the work of removing the second partition plate (Fe2).

[0092] Further, the second partition plate (Fe2) of the first housing part (42A) and the first partition plate (Fe1) of the second housing part (42B) face each other in the left-right direction. Thus, even if the first partition plate (Fe1) and the second partition plate (Fe2) face each other in the left-right direction, the partition plates (Fe1, Fe2) can be attached to and detached from the frames (Fa5, Fa6) from the front side (the other direction side of the second direction). Therefore, the partition plates (Fe1, Fe2) can be easily attached to and detached, and the maintainability can be improved.

[0093] Also, the first plate part (Fe21) of the first housing part (42A) forms a first air suction port (I1) for air to the first blower chamber (S2A) of the first housing part (42A). That is, one side of the first suction port (I1) is formed along the edge of the first plate part (Fe21). Thus, since the first suction port (I1) and the first plate part (Fe21) are close to each other, the first plate parts (Fe11, Fe12) can be removed from the frames (Fa5, Fa6) and the maintenance of the first suction port (I1) can be easily performed.

[0094] (10) Modification A heat source unit (1A) which is a modification of the heat source unit (1) will be described. Regarding the heat source unit (1A), mainly the differences from the heat source unit (1) will be described. For the components of the heat source unit (1A), the same reference numerals are given to the components that are the same as or corresponding to the components of the heat source unit (1), and detailed descriptions and descriptions of the accompanying effects and the like will not be repeated.

[0095] The heat source unit (1A) which is a modification is different from the heat source unit (1) in that it performs not only a cooling operation but also a heating operation.

[0096] As shown in FIG. 15, the heat source unit (1A) includes a heat source circuit (111). The heat source circuit (111) is provided in the corresponding heat source units (115A, 115B) respectively. A compressor (112), air heat exchangers (12A, 12C), a first expansion valve (113), a second expansion valve (114), a receiver (115), and a four-way switching valve (116) are connected to the heat source circuit (111).

[0097] The first expansion valve (113) and the second expansion valve (114) are each composed of an electric valve with a variable opening degree. The first air heat exchanger (12A) and the first expansion valve (113) are connected to the first parallel circuit (118), and the third air heat exchanger (12C) and the second expansion valve (114) are connected to the second parallel circuit (119). The first parallel circuit (118) and the second parallel circuit (119) constitute a refrigerant parallel circuit in a parallel relationship with each other.

[0098] The receiver (115) is a vertically long hollow sealed container and constitutes a refrigerant regulator. Excess refrigerant is stored inside the receiver (115).

[0099] The four-way switching valve (116) has ports from the first to the fourth. In the four-way switching valve (116), the first port is connected to the discharge part of the compressor (112), the second port is connected to the suction part of the compressor (112), the third port is connected to the gas ends of the air heat exchangers (12A, 12C), and the fourth port is connected to the gas line (131) of the utilization circuit (130). The four-way switching valve (116) switches between a state where the first port and the third port communicate and the second port and the fourth port communicate (the first state shown by the solid line in FIG. 15) and a state where the first port and the fourth port communicate and the second port and the third port communicate (the second state shown by the broken line in FIG. 15).

[0100] A subcooling unit (120) and a refrigerant cooling unit (125) are connected to the heat source circuit (111).

[0101] The subcooling unit (120) includes a subcooling heat exchanger (121), an injection circuit (122), and a first electric valve (123). The subcooling heat exchanger (121) has a first flow path (121a) communicating with the receiver (115) and a second flow path (121b) connected to the injection circuit (122). The injection circuit (122) has an inflow end connected between the receiver (115) and the subcooling unit (120), and an outflow end communicating with the suction part of the compressor (112). The first electric valve (123) is connected upstream of the second flow path (121b) in the injection circuit (122). The first electric valve (123) is constituted by an electronic expansion valve with a variable opening degree. In the subcooling heat exchanger (121), the liquid refrigerant flowing through the first flow path (121a) exchanges heat with the refrigerant flowing through the second flow path (121b). As a result, in the subcooling heat exchanger (121), the liquid refrigerant flowing through the first flow path (121a) is cooled.

[0102] The refrigerant cooling unit (125) includes a cooling circuit (126). One end of the cooling circuit (126) branches into two. One of the two branch parts of the cooling circuit (126) is connected between the first air heat exchanger (12A) and the first expansion valve (113) in the first parallel circuit (118). The other of the two branch parts of the cooling circuit (126) is connected between the third air heat exchanger (12C) and the second expansion valve (114) in the second parallel circuit (119). The other end of the cooling circuit (126) is connected between the receiver (115) and the two expansion valves (113, 114). A second electric valve (128), which is an electronic expansion valve for example, is connected to the cooling circuit (126).

[0103] The utilization circuit (130) corresponding to the heat source unit (115A) is connected to the first refrigerant-side flow path (135a) of the water heat exchanger (135). The utilization circuit (130) corresponding to the heat source unit (115B) is connected to the second refrigerant-side flow path (135b) of the water heat exchanger (135).

[0104] Each utilization circuit (130) has a gas line (131) and a liquid line (132) respectively. The gas line (131) is connected between the gas end of the water heat exchanger (135) and the fourth port of the four-way switching valve (116). The liquid line (132) is connected between the liquid end of the water heat exchanger (135) and the subcooling heat exchanger (121). A third expansion valve (133), which is an electronic expansion valve for example, is connected to the liquid line (132).

[0105] The water circuit (140) has an inflow pipe (141) and an outflow pipe (142) in order from the upstream side to the downstream side. The inflow pipe (141) is connected to the inflow end of the first water flow path (135c) of the water heat exchanger (135). The outflow pipe (142) is connected to the outflow end of the first water flow path (135c) of the water heat exchanger (135). A water pump (144) for conveying the water in the water circuit (140) is connected to the inflow pipe (141).

[0106] (10-1) Cooling operation In the cooling operation, the four-way switching valve (116) is in the first state, and a refrigeration cycle is performed in which each air heat exchanger (12A, 12C) becomes a radiator or a condenser and the water heat exchanger (135) becomes an evaporator. Specifically, the refrigerant compressed by the compressor (112) is divided into the first air heat exchanger (12A) and the third air heat exchanger (12C). In each air heat exchanger (12A, 12C), the refrigerant dissipates heat to the outdoor air and condenses. The refrigerant that has dissipated heat in the first air heat exchanger (12A) passes through the fully open first expansion valve (113). The refrigerant that has dissipated heat in the third air heat exchanger (12C) passes through the fully open second expansion valve (114). The refrigerant that has merged in the receiver (115) passes through the subcooling heat exchanger (121), is decompressed by the third expansion valve (133), and then flows through the water heat exchanger (135). In the water heat exchanger (135), the refrigerant absorbs heat from the water in the water circuit (140) and evaporates, and this water is cooled. The refrigerant that has evaporated in the water heat exchanger (135) is sucked into the compressor (112) and compressed.

[0107] (10-2) Heating operation In the heating operation, the four-way switching valve (116) assumes the second state, and a refrigeration cycle is performed in which the water heat exchanger (135) serves as a radiator or a condenser and each air heat exchanger (12A, 12C) serves as an evaporator. Specifically, the refrigerant compressed by the compressor (112) flows through the water heat exchanger (135). In the water heat exchanger (135), the refrigerant releases heat to the water in the water circuit (140) and condenses, and this water is heated. The refrigerant condensed in the water heat exchanger (135) sequentially passes through the fully open third expansion valve (133), the subcooling heat exchanger (121), and the receiver (115), and is branched into the first expansion valve (113) and the second expansion valve (114). The refrigerant decompressed by the first expansion valve (113) evaporates in the first air heat exchanger (12A). The refrigerant decompressed by the second expansion valve (114) evaporates in the third air heat exchanger (12C). The refrigerant evaporated in each air heat exchanger (12A, 12C) merges and is then sucked into the compressor (112) and compressed.

[0108] (10-3) Configuration of Air Heat Exchanger and Casing As shown in FIGS. 16 and 17, the air heat exchangers (12A, 12B, 12C, 12D) have an L shape when viewed in the vertical direction. The air heat exchangers (12A, 12B) include a first portion (12Aa, 12Ba) extending along the left-right direction and a second portion (12Aa, 12Bb) that is connected to bend or curve at the left portion of the first portion (12Aa, 12Ba) and extends along the rear direction. The first portion (12Aa, 12Ba) is inclined forward with respect to the upward direction so as to have the same inclination angle as the second support frame (Fd2). The second portion (12Aa, 12Bb) extends along the vertical direction. In the heat source unit (1A), by not providing the first support frame (Fd1), an installation space for the L-shaped air heat exchangers (12A, 12B) is secured.

[0109] In the heat source unit (1A), in the front-rear direction, the first side plate (Ff1) has a length that covers the rear part of the blower chambers (S2A, S2B) but does not cover the front part. As a result, the second parts (12Aa, 12Bb) of the air heat exchangers (12A, 12B) are prevented from being covered by the first side plate (Ff1) and are exposed to the outside of the blower chambers (S2A, S2B). Consequently, air can flow between the inside and outside of the blower chambers (S2A, S2B) through both the first parts (12Aa, 12Ba) and the second parts (12Aa, 12Bb) of the air heat exchangers (12A, 12B).

[0110] The air heat exchangers (12C, 12D) include a third part (12Ca, 12Da) extending along the left-right direction and a fourth part (12Da, 12Db) connected to the right part of the third part (12Ca, 12Da) so as to bend or curve and extending along the front direction. The third part (12Ca, 12Da) is inclined rearward with respect to the upward direction so as to have the same inclination angle as the third support frame (Fd3). The fourth part (12Da, 12Db) extends along the up-down direction. In the heat source unit (1A), by not providing the fourth support frame (Fd4), an installation space for the L-shaped air heat exchangers (12C, 12D) is secured.

[0111] In the heat source unit (1A), in the front-rear direction, the second side plate (Ff2) has a length that covers the front part of the blower chambers (S2A, S2B) but does not cover the rear part. As a result, the fourth parts (12Da, 12Db) of the air heat exchangers (12C, 12D) are prevented from being covered by the second side plate (Ff2) and are exposed to the outside of the blower chambers (S2A, S2B). Consequently, air can flow between the inside and outside of the blower chambers (S2A, S2B) through both the third parts (12Ca, 12Da) and the fourth parts (12Da, 12Db) of the air heat exchangers (12C, 12D).

[0112] (11) Other embodiments The above-described embodiments may have the following configurations.

[0113] The heat source unit (1) of the embodiment is a chiller unit dedicated to cooling that generates chilled water. The heat source unit (1A), which is a modification of the heat source unit (1), may be a so-called heat pump type chiller unit that generates both chilled water and hot water. However, the heat source units (1, 1A) may be a hot water supply heat source unit that generates hot water.

[0114] The water heat exchangers (31, 32, 135) may be one or three or more.

[0115] In the heat source unit (1) shown in FIG. 8, the second partition plate (Fe2) of the first housing part (42A) and the first partition plate (Fe1) of the second housing part (42B) are separate members arranged adjacent to each other in the left-right direction. However, the present invention is not limited to this. The second partition plate (Fe2) of the first housing part (42A) and the first partition plate (Fe1) of the second housing part (42B) may constitute one partition plate (the fifth partition plate). The fifth partition plate has a T shape when viewed from above by integrating the second plate part (Fe22) of the second partition plate (Fe2) of the first housing part (42A) and the second plate part (Fe12) of the first partition plate (Fe1) of the second housing part (42B). In this case, regarding the fourth partition plate (Fe4) of the first housing part (42A) and the third partition plate (Fe3) of the second housing part (42B), they may also be constituted by one partition plate (the sixth partition plate) having a T shape when viewed from above by integrating the second plate part (Fe42) and the second plate part (Fe32). In this case, regarding the column part (Fc) and the side plate (Ff) arranged between the fifth partition plate and the sixth partition plate, it may be constituted by one column part (Fc) attached to the fifth partition plate, one column part (Fc) attached to the sixth partition plate, and one side plate (Ff) arranged between these column parts (Fc). That is, between the T-shaped fifth partition plate and the T-shaped sixth partition plate, it is not necessary to provide two units with one side plate (Ff) arranged between two column parts (Fc) side by side left and right as shown in FIG. 8, and only one such unit needs to be provided.

[0116] The heat source unit (1) may be configured to include a heat source circuit (111) instead of the refrigerant circuit (10) and be capable of performing both cooling operation and heating operation. A heat source unit (1A) which is a modification of the heat source unit (1) may be configured to include a refrigerant circuit (10) instead of the heat source circuit (111) and be capable of performing only the cooling operation out of the cooling operation and the heating operation.

[0117] A thermistor may be disposed in the first blower chamber (S2A) of the first housing portion (42A). Further, as shown in FIG. 11, the thermistor may be located at a position visible from the outside of the first housing portion (42A) through an opening (Fg) in a state where the second partition plate (Fe2) is removed from the first housing portion (42A). Thereby, since the thermistor can be easily accessed from the outside of the first housing portion (42A) through the opening (Fg), the maintainability of the thermistor can be improved.

[0118] The first partition plate (Fe2) may be located on the movement locus of the maintenance part when the maintenance part disposed in the first blower chamber (S2A) of the first housing portion (42A) is taken out to the outside of the first housing portion (42A). Thereby, by removing the first partition plate (Fe2) from the first housing portion (42A), the maintenance part can be easily taken out from the first blower chamber (S2A) of the first housing portion (42A) through the opening (Fg) (see FIG. 11).

[0119] As described above, the embodiments and the modifications have been explained. 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, modifications, and other embodiments may be combined or replaced as appropriate as long as the functions of the object of the present disclosure are not impaired.

[0120] The descriptions such as "first", "second", "third",... mentioned 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

[0121] As described above, the present disclosure is useful for a heat source unit.

Explanation of Signs

[0122] 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 42 Housing part 42A First housing part 42B Second housing part Fa5 Fifth horizontal frame Fa6 Sixth horizontal frame part Fe11, Fe21, Fe31, Fe41 First plate part Fe12, Fe22, Fe32, Fe42 Second plate part S1 Machinery room S2 Blower room S2A First blower room S2B Second blower room

Claims

1. A plurality of housing parts (42) arranged side by side, and Air heat exchangers (12A, 12B, 12C, 12D) provided in each of the plurality of housing parts (42). It is equipped with Among the plurality of housing parts (42), the first housing part (42A), which is any one of the housing parts (42), includes a first partition plate (Fe2) including a first plate part (Fe21) and a second plate part (Fe22). The first plate part (Fe21) faces the internal space (S2A) of the first housing part (42A) in a second direction perpendicular to the first direction, which is the direction in which the plurality of housing parts (42) are arranged, and is fastened to the frames (Fa5, Fa6) of the first housing part (42A). The second plate part (Fe22) is a heat source unit that faces the internal space (S2A) of the first housing part (42A) in the first direction.

2. The second plate part (Fe22) has a shape extending from the first plate part (Fe21) to one side in the second direction, The heat source unit according to claim 1, wherein the first plate part (Fe21) is detachably fastened to the frames (Fa5, Fa6) of the first housing part (42A) from the other side in the second direction.

3. It includes fans (5A, 5B) arranged on one side in a third direction perpendicular to the first direction and the second direction with respect to the internal space (S2A), The first housing part (42A) includes a column part (Fc2) that supports the fans (5A, 5B) or a housing (43A) in which the fans (5A, 5B) are accommodated from the other side in the third direction, The heat source unit according to claim 1 or claim 2, wherein the second plate part (Fe22) is attached to the column part (Fc2).

4. The second plate part (Fe22) faces the column part (Fc2) in the second direction, A first engaging part (Fe22c) is provided on the surface of the second plate part (Fe22) that faces the column part (Fc2), The heat source unit according to claim 3, wherein a second engaging part (Fc21) that engages with the first engaging part (Fe22c) is provided on the surface of the column part (Fc2) that faces the second plate part (Fe22).

5. The air heat exchanger (12A) of the first housing part (42A) is inclined with respect to the third direction. The first plate portion (Fe21) of the first partition plate (Fe2) extends along the inclination direction of the air heat exchanger (12A) of the first housing portion (42A), and the heat source unit according to claim 3.

6. The column portion (Fc2) has a shape extending along the third direction, The second plate portion (Fe22) has a smaller dimension in the second direction as it goes toward the other direction side of the third direction, and the heat source unit according to claim 5.

7. The air heat exchanger (12A) of the first housing portion (42A), the first partition plate (Fe2), and the column portion (Fc2) are arranged in the order of the air heat exchanger (12A) of the first housing portion (42A), the first partition plate (Fe2), and the column portion (Fc2) along the first direction, and the heat source unit according to claim 3.

8. The air heat exchangers (12A, 12B, 12C, 12D) have an L shape, and the heat source unit according to claim 1 or claim 2.

9. It includes a thermistor disposed in the internal space (S2A) of the first housing portion (42A), The thermistor is located at a place visible from the outside of the first housing portion (42A) in a state where the first partition plate (Fe2) is removed from the first housing portion (42A), and the heat source unit according to claim 1 or claim 2.

10. The plurality of housing portions (42) include a second housing portion (42B) adjacent to the first housing portion (42A) in the first direction, The second housing portion (42B) has a second partition plate (Fe1) facing the internal space (S2B) of the second housing portion (42B) and facing the first direction and the second direction, The first partition plate (Fe2) and the second partition plate (Fe1) face each other in the first direction, and the heat source unit according to claim 1 or claim 2.

11. The first plate portion (Fe21) forms an air suction port (I1) into the internal space (S2A) of the first housing portion (42A), and the heat source unit according to claim 1 or claim 2.

12. The first partition plate (Fe2) is located on the movement trajectory of the maintenance parts when the maintenance parts disposed in the internal space (S2A) of the first housing portion (42A) are taken out to the outside of the first housing portion (42A), and the heat source unit according to claim 1 or claim 2.

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