JP7555238B2 - Chiller System - Google Patents

Description

This disclosure relates to a chiller system.

Patent Document 1 discloses a power saving device that reduces power consumption by spraying water onto the heat exchanger of an outdoor unit (chiller unit). This power saving device sprays supplied water onto the heat exchanger surface of the outdoor unit of an air conditioner. The sprayed water evaporates near the heat exchanger surface, removing heat from the surrounding area and providing a cooling effect.

JP 2014-031926 A

However, the water supply device described in Patent Document 1 is configured to spray water onto only one side of each of the multiple chiller units arranged in an array for cooling. Therefore, in the case of chiller units that have side openings on both sides, sufficient cooling cannot be achieved, resulting in reduced cooling efficiency.

This disclosure has been made to solve the above problems, and aims to provide a chiller system that can improve cooling efficiency.

In order to solve the above problems, a chiller system according to the present disclosure includes a chiller group having a plurality of chiller units arranged side by side at intervals in a horizontal direction, each of the chiller units having a casing having a pair of side surfaces with a side opening formed on each side in a direction of arrangement of the chillers, a heat exchanger provided within the casing, and a fan that introduces air into the casing from the side opening, and further includes a sprinkler device having a plurality of sprinkler tubes extending along each of the side surfaces in a depth direction of the side surfaces and capable of supplying water to each of the side surfaces via a nozzle, the plurality of sprinkler tubes being a first sprinkler tube extending along a side surface of an end of the chiller group in the direction of arrangement of the chillers. and a second sprinkler pipe extending along the side surfaces between adjacent chiller units and capable of supplying water to both of the side surfaces by sprinkling water into the space between the side surfaces , wherein only one of the plurality of chiller units at an end on one side in the parallel installation direction is provided with a pair of sprinkler pipes corresponding to the pair of side surfaces of the one chiller unit, and other chiller units among the plurality of chiller units other than the one chiller unit are provided with one sprinkler pipe corresponding to only the side surface on the other side in the parallel installation direction of the pair of side surfaces of the other chiller unit.

The chiller system disclosed herein can improve cooling efficiency.

FIG. 2 is a cross-sectional view showing a plurality of adjacent chiller units according to the first embodiment of the present disclosure. FIG. 1 is a plan view showing a chiller system according to a first embodiment of the present disclosure. FIG. 11 is a cross-sectional view showing adjacent chiller units according to a second embodiment of the present disclosure. FIG. 4 is a plan view showing a chiller system according to a second embodiment of the present disclosure. 1 is a cross-sectional view showing a modified example of the first sprinkler pipe and the second sprinkler pipe of the chiller system according to the first embodiment of the present disclosure. FIG. FIG. 11 is a cross-sectional view showing a modified example of the first sprinkler pipe and the second sprinkler pipe of the chiller system according to the second embodiment of the present disclosure.

First Embodiment
(Chiller system)
Hereinafter, a chiller system 1 according to a first embodiment of the present disclosure will be described with reference to FIGS. 1 and 2. FIG.

The chiller system 1 includes a plurality of chiller units 20 (three in this embodiment) and a water sprinkler device 30 provided along a side surface 21 a of each chiller unit 20 .
The chiller unit 20 is used as an outdoor unit of an air conditioner installed in buildings such as large buildings and warehouses. The chiller unit 20 circulates a refrigerant such as water between the chiller unit 20 and an indoor unit (not shown) installed in the building. The chiller unit 20 cools the refrigerant, and the cooled refrigerant is supplied to an indoor heat exchanger of the indoor unit and exchanges heat with the air in the room.

The multiple chiller units 20 are arranged in a row with horizontal spacing between them. Hereinafter, the direction in which the chiller units 20 are arranged in a row (left-right direction on the paper in Figures 1 and 2) will be referred to as the arrangement direction H1. Each chiller unit 20 extends in a horizontal direction perpendicular to the arrangement direction H1 (depth direction on the paper in Figure 1 and up-down direction on the paper in Figure 2) as the depth direction H2. The multiple chiller units 20 as a whole constitute the chiller group 10.

(Chiller unit)
The chiller unit 20 includes a casing 21 , a heat exchanger 23 , a fan 22 , a side opening 21 b , an upper opening 21 c , and a base 24 .

(base)
The base 24 is provided on an installation surface G, such as the rooftop of the building in which the chiller unit 20 is installed or the ground outside the building. The base 24 extends upward from the installation surface G in a vertical direction that is perpendicular to the horizontal direction.
The base 24 has a compressor and a control device, etc., not shown, inside, and the control device has the function of controlling the chiller unit 20, including the operation of the compressor, the rotation of the fan 22, and the flow of refrigerant inside the heat exchanger 23.

(Casing)
The casing 21 accommodates the heat exchanger 23 and the fan 22 therein. In this embodiment, the casing 21 is provided on a base 24. Furthermore, the casing 21 has a cylindrical shape extending in the vertical direction. The width dimension of the casing 21 in the horizontal direction in which the multiple chiller units 20 are adjacent to each other gradually increases from the lower end to the upper end.

In other words, the casing 21 illustrated in the first embodiment has a trapezoidal shape that gradually expands from the bottom end to the top end when viewed from the depth direction H2 and the parallel installation direction H1.

As a result, in chiller units 20 adjacent to each other in the parallel installation direction H1, the gap S between the casing 21 of one chiller unit 20 and the casing 21 of the other chiller unit 20 gradually narrows from bottom to top in the vertical direction.

The casing 21 has side openings 21b on both side surfaces 21a in the parallel installation direction H1. The side openings 21b are formed on the side surfaces 21a of the casing 21 facing the parallel installation direction H1 so as to penetrate the side surfaces 21a. That is, the inside and outside of the casing 21 are in communication via the side openings 21b. The side openings 21b provided on the casings 21 of the chiller units 20 adjacent to each other in the parallel installation direction H1 face each other. The lower end of the casing 21 is closed by the base 24. The casing 21 has an upper opening 21c at its upper end on the upper side in the vertical direction. The upper opening 21c opens toward the upper side in the vertical direction.

(Heat exchanger)
The heat exchanger 23 is provided in the casing 21. In this embodiment, two heat exchangers 23 are provided for each casing 21. Furthermore, in this embodiment, the heat exchangers 23 are provided, one on each side near the side surfaces 21a in the parallel installation direction H1, in each casing 21. Furthermore, the heat exchangers 23 are provided along the side surfaces 21a of the casing 21 so as to face the side openings 21b.

(fan)
The fan 22 is provided inside the casing 21. In this embodiment, the fan 22 is disposed near the upper opening 21c inside the casing 21. A plurality of the fans 22 are provided lined up in the depth direction H2 in Fig. 1. In this embodiment, four fans 22 are provided inside the casing 21.

The fan 22 is a so-called axial fan that rotates around the central axis O of each chiller unit 20 that extends in the vertical direction, and has multiple blades 22a arranged in a line in the circumferential direction centered on the central axis O. The fan 22 is driven to rotate around the central axis O by the motor 22b. By rotating around the central axis O, the fan 22 generates an air flow F as shown in FIG. 1. More specifically, the fan 22 generates an air flow F from below to above by being driven to rotate around the central axis O. In other words, the fan 22 introduces air into the casing 21 from the side opening 21b, and exhausts the introduced air from the upper opening 21c via the heat exchanger 23.

(Water sprinkler system)
The sprinkler device 30 has a first sprinkler pipe 31 and a second sprinkler pipe 32 serving as sprinkler pipes, a supply pipe 33, and a water supply tank (not shown). The sprinkler device 30 supplies water to the side surface 21 a of the chiller unit 20.

(First sprinkler pipe)
The first sprinkler pipe 31 has a first main pipe 31 a and a plurality of nozzles 34 .
The first main pipe 31a is a metal pipe and extends along one side surface 21a of the chiller unit 20 at one end (the right side in FIGS. 1 and 2 ) and along the other side surface 21a of the chiller unit 20 at the other end (the left side in FIGS. 1 and 2 ).

In this embodiment, two first main pipes 31a are provided.
One of the first main pipes 31a is arranged to extend along the side surface 21a at one end of the chiller group 10 in the parallel installation direction H1, i.e., along one side surface 21a of the casing 21 of the chiller unit 20 at one end of the chiller group 10 in the parallel installation direction H1.
The other second main pipe 32a is provided to extend along the side surface 21a of the end portion on the other side in the juxtaposition direction H1 of the chiller group 10, i.e., along the other side surface 21a of the casing 21 of the chiller unit 20 at the end portion on the other side in the juxtaposition direction H1 of the chiller group 10. As a result, one first main pipe 31a corresponds to each chiller unit 20 at both ends in the juxtaposition direction H1.

An end portion of the first main pipe 31 a facing the rear side in the depth direction H2 is closed so as to prevent leakage of the cooling water flowing inside the first main pipe 31 a. The first main pipe 31 a is connected to a supply pipe 33 that supplies the cooling water into the first main pipe 31 a, which will be described later.
In addition, the first main pipe 31a is provided with a plurality of nozzles 34 spaced at intervals at various locations so as to be able to spray water downward in the vertical direction.

This allows cooling water to flow inside the first main pipe 31a, and the first main pipe 31a can use the nozzle 34 to spray cooling water onto one side surface 21a of the chiller unit 20 located at one end in the parallel installation direction H1 and into the space near the side surface 21a.

Similarly, the first main pipe 31a can use the nozzle 34 to spray cooling water onto the other side 21a of the chiller unit 20 located at the other end in the parallel installation direction H1 and onto the space near the side 21a.

(Second sprinkler pipe)
The second sprinkler pipe 32 has a second main pipe 32 a and a plurality of nozzles 34 .
The second main pipe 32a is a metal pipe and extends along the side surfaces 21a between the side surfaces 21a of the chiller units 20 adjacent to each other in the parallel installation direction H1.

The second main pipe 32a is provided on the other side surface 21a of the casing 21 of one of the adjacent chiller units 20. As a result, one second main pipe 32a corresponds to each chiller unit 20 except for the chiller unit 20 at the end on the other side of the parallel installation direction H1.

In other words, the first main pipe 31a and the second main pipe 32a are provided only on the chiller unit 20 at one end in the parallel installation direction H1 so as to correspond to a pair of side surfaces 21a of the chiller unit 20.

Further, in each of the chiller units 20 except for the chiller unit 20 at the end in the parallel installation direction H1, a second main pipe 32a is provided so as to correspond only to the other side surface 21a of the pair of side surfaces 21a of the chiller unit 20.
Further, the chiller unit 20 at the other end in the parallel installation direction H1 is provided with a first main pipe 31a so as to correspond only to the other side surface 21a of the pair of side surfaces 21a of the chiller unit 20 .

An end portion of the second main pipe 32a facing the rear side in the depth direction H2 is closed so as to prevent the cooling water flowing inside the second main pipe 32a from leaking out. The second main pipe 32a is connected to a supply pipe 33.
In addition, the second main pipe 32a is provided with a plurality of nozzles 34 spaced at intervals at various locations so as to be able to spray water downward in the vertical direction.

This allows cooling water to flow inside the second main pipe 32a, and the second main pipe 32a can use the nozzle 34 to spray cooling water into the gap S defined between the side surfaces 21a of the chiller units 20 facing each other in the parallel installation direction H1 and onto both side surfaces 21a of the chiller units 20 facing each other.

The flow path cross-sectional area of the second main pipe 32a is formed to be larger than the flow path cross-sectional area of the first main pipe 31a. This makes the amount of water sprayed from the second sprinkler pipe 32 greater than the amount of water sprayed from the first sprinkler pipe 31. It is preferable that the flow path cross-sectional area of the second main pipe 32a and the flow path cross-sectional area of the first main pipe 31a are formed so that the flow rate of the cooling water in the second main pipe 32a is approximately twice the flow rate of the cooling water in the first main pipe 31a.

(Supply pipe)
The supply pipe 33 is a metal pipe. The supply pipe 33 exists separately from the chiller group 10, and supplies cooling water to the first main pipe 31a and the second main pipe 32a. One end of the supply pipe 33 is connected to a water supply tank (not shown) having a pump and the like that exists separately from the chiller group 10, and cooling water is supplied at a constant pressure from the water supply tank through the connected one end into the supply pipe 33.

The supply pipe 33 branches into multiple parts (for example, the number of chiller units 20 arranged in the parallel installation direction H1 in the first embodiment) on the way from the water supply tank to the supply pipe 33. The supply pipe 33 that branches to one end on one side of the parallel installation direction H1 further branches into a T-shape.

Furthermore, in the chiller unit 20 at one end in the parallel installation direction H1, the other end of the supply pipe 33 after branching into a T shape toward the first main pipe 31a and the second main pipe 32a is connected to the first main pipe 31a and the second main pipe 32a, respectively. As a result, the cooling water supplied from the water supply tank is supplied into the first main pipe 31a and the second main pipe 32a of the chiller unit 20 at one end.

The other ends of the branched supply pipes 33 are connected to the first main pipe 31a of the chiller unit 20 at the other end and the second main pipe 32a of the chiller units 20 except for the chiller unit 20 located at the end. This allows cooling water to be supplied to all of the first main pipes 31a and second main pipes 32a by the supply pipes 33.

(nozzle)
The nozzle 34 is a so-called fan-shaped nozzle made of metal that spreads out in a fan shape with a certain thickness from the spray position of the nozzle 34 to spray cooling water. The nozzle 34 has an outlet (not shown) formed in a groove shape by cutting out a member near the outlet so that the central angle of the fan shape, which is the spray range in the depth direction H2 when viewed from the parallel installation direction H1, is 80° to 100°, preferably 90°.

A plurality of nozzles 34 (eight in this embodiment) are provided at predetermined positions on the first main pipe 31a and the second main pipe 32a at intervals.
Nozzles 34 provided in first main pipes 31a of chiller units 20 at one end in the parallel installation direction H1 spray cooling water onto one side surface 21a of each chiller unit 20 and the space near the side surface 21a. Nozzles 34 provided in first main pipes 31a of chiller units 20 at the other end in the parallel installation direction H1 spray cooling water onto the other side surface 21a of each chiller unit 20 and the space near the side surface 21a.

The nozzle 34 provided on the second main pipe 32a sprays cooling water into the gap S defined between the side surfaces 21a of the chiller units 20 that face each other in the parallel installation direction H1, and onto both side surfaces 21a of the chiller units 20 that face each other.

With the second main pipe 32a and nozzle 34 configured as described above, the second sprinkler pipe 32 can sprinkle water on an area adjacent to the corresponding chiller unit 20 so as to compensate for the area that is not sprayed with water.

(Action and Effect)
The chiller system 1 according to the first embodiment of the present disclosure is configured such that the first sprinkler pipe 31 sprinkles water through a plurality of nozzles 34 onto the side surfaces 21a of each chiller unit 20 arranged at the end of the arrangement direction H1 and onto the space near the side surfaces 21a. The second sprinkler pipe 32 sprinkles water through a plurality of nozzles 34 onto both side surfaces 21a of each chiller unit 20 adjacent to each other in the arrangement direction H1 and onto the gaps S partitioned between the chiller units 20. This allows the side surfaces 21a of each chiller unit 20 and the air near the side openings 21b. Therefore, the air introduced into the casing 21 of each chiller unit 20 can be cooled, and the cooling efficiency of the chiller system 1 can be improved.

In addition, the chiller system 1 according to the first embodiment of the present disclosure can continuously arrange multiple chiller units 20 in the parallel arrangement direction H1, and can reduce the distance between two adjacent chiller units 20 in the parallel arrangement direction H1 to a width that allows the second sprinkler pipe 32 and the nozzle 34 to be present. This makes it possible to achieve overall space saving in the chiller system 1 when continuously arranging several tens of chiller units 20 in parallel.

In addition, since the second water sprinkler pipe 32 is provided along the other side 21a of both sides 21a in the parallel installation direction H1 of each chiller unit 20, it is possible to arrange the chiller units 20 in the parallel installation direction H1 using the same arrangement method when consecutively arranging the chiller units 20. This makes it easier to design and arrange the chiller system 1.

In addition, the chiller system 1 according to the first embodiment of the present disclosure is configured such that the amount of water sprayed from the second sprinkler pipe 32 is greater than the amount of water sprayed from the first sprinkler pipe 31. This allows the cooling capacities of the first sprinkler pipe 31 and the second sprinkler pipe 32 to be uniform. Therefore, the cooling efficiency of the chiller system 1 can be homogenized.

Second Embodiment
Hereinafter, a chiller system 1A according to a second embodiment of the present disclosure will be described with reference to Fig. 3 and Fig. 4. In the second embodiment, components similar to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

(First sprinkler pipe)
The first sprinkler pipe 31 has a first main pipe 31 a and a plurality of nozzles 34 .
The first main pipe 31a has the same configuration as in the first embodiment.

(Second sprinkler pipe)
The second sprinkler pipe 32 has a second main pipe 32 a and a plurality of nozzles 34 .
The second main pipes 32a extend one by one along the side surfaces 21a on one side and the other side in the arrangement direction H1 of the chiller units 20 except for the chiller unit 20 arranged at the end of the chiller group 10. In other words, a pair of second main pipes 32a are provided corresponding to a pair of side surfaces 21a on one side and the other side in the arrangement direction H1 of the casing 21 of the chiller unit 20.

Furthermore, the second main pipe 32a extends along the side surface 21a on the other side of the chiller unit 20 at one end, and extends along the side surface 21a on one side of the chiller unit 20 at the other end. In other words, the second main pipe 32a is provided on the side surface 21a on the other side of the casing 21 of the chiller unit 20 at one end, and extends along the side surface 21a on one side of the casing 21 of the chiller unit 20 at the other end.

By arranging the second main pipes 32a as described above, two second main pipes 32a extend between the side surfaces 21a of adjacent chiller units 20. One second main pipe 32a corresponds to each chiller unit 20 at the end, and a pair of second main pipes 32a correspond to a pair of side surfaces 21a of the chiller units 20 other than the chiller unit 20 arranged at the end.

That is, the chiller unit 20 at the end in the parallel installation direction H1 is provided with a first main pipe 31a and a second main pipe 32a so as to correspond to a pair of side surfaces 21a of the chiller unit 20.
Further, a pair of second main pipes 32 a are provided in each of the chiller units 20 except for the chiller unit 20 at the end in the parallel installation direction H<b>1 so as to correspond to a pair of side surfaces 21 a of the chiller unit 20 .

An end portion of the second main pipe 32a facing the rear side in the depth direction H2 is closed so as to prevent the cooling water flowing inside the second main pipe 32a from leaking out. The second main pipe 32a is connected to a supply pipe 33.
Further, the second main pipe 32a is provided with a plurality of nozzles 34 spaced at intervals at various positions, facing downward in the vertical direction.

This allows cooling water to flow inside the second main pipe 32a, and the second main pipe 32a can use the nozzle 34 to spray cooling water into the gap S defined between the side surfaces 21a of the chiller units 20 facing each other in the parallel installation direction H1 and onto both side surfaces 21a of the chiller units 20 facing each other.

The flow path cross-sectional area of the second main pipe 32a is formed smaller than the flow path cross-sectional area of the first main pipe 31a. As a result, the amount of water sprayed from the second sprinkler pipe 32 is less than the amount of water sprayed from the first sprinkler pipe 31. It is preferable that the flow path cross-sectional area of the second main pipe 32a and the flow path cross-sectional area of the first main pipe 31a are formed so that the flow rate of the cooling water in the second main pipe 32a is approximately half the flow rate of the cooling water in the first main pipe 31a.

(Supply pipe)
The supply pipe 33 exists separately from the chiller group 10, and is a pipe that supplies cooling water to the first main pipe 31a and the second main pipe 32a. One end of the supply pipe 33 is connected to a water supply tank (not shown) having a pump or the like that exists separately from the chiller group 10, and cooling water is supplied from the water supply tank to the inside of the supply pipe 33 via the connected one end. The supply pipe 33 branches into a plurality of pipes (in this embodiment, for example, the number of chiller units 20 arranged in the juxtaposition direction H1) on the way from the water supply tank to the supply pipe 33, and after the branching, the pipes further branch into a T shape.

The other end of the branched supply pipe 33 is connected to the first main pipe 31a and the second main pipe 32a of the chiller unit 20 at the end, and to a pair of second main pipes 32a of the chiller units 20 other than the chiller unit 20 located at the end. This allows the cooling water supplied from the water supply tank to be supplied into the first main pipe 31a and the second main pipe 32a.

(nozzle)
As shown in Fig. 4, the nozzles 34 are arranged between the first main pipe 31a and the second main pipe 32a adjacent to each other in the arrangement direction H1, and between the two second main pipes 32a between the side surfaces 21a of the chiller units 20 adjacent to each other, while being shifted from each other in the direction along the side surface 21a. In particular, in this embodiment, the nozzles 34 are provided in the first main pipe 31a and the second main pipe 32a, respectively, while being shifted from each other in the depth direction H2, which is the direction along the side surface 21a. In addition, since the second main pipes 32a are shifted from each other in the up-down direction in the direction along the side surface 21a, the nozzles 34 are also shifted from each other in the direction along the side surface 21a.

With the second main pipe 32a and nozzle 34 configured as described above, the second sprinkler pipe 32 can sprinkle water on an area adjacent to the corresponding chiller unit 20 so as to compensate for the area that is not sprayed with water.

(Action and Effect)
The chiller system 1A according to the second embodiment of the present disclosure is configured such that the first sprinkler pipe 31 sprinkles water through a plurality of nozzles 34 onto the side surface 21a of each chiller unit 20 at the end in the parallel arrangement direction H1 and onto the space near the side surface 21a. Also, the two second sprinkler pipes 32 sprinkle water through a plurality of nozzles 34 onto the gap S defined between the side surfaces 21a of adjacent chiller units 20. This allows the air near the side surface 21a and side opening 21b of each chiller unit 20 to be cooled. Therefore, the air introduced into the casing 21 of each chiller unit 20 can be cooled, and the cooling efficiency of the chiller system 1A can be improved.

The chiller system 1A according to the second embodiment of the present disclosure is configured to spray water evenly and thoroughly over the gaps S defined between the side surfaces 21a of adjacent chiller units 20 and over the side surfaces 21a at the ends in the parallel installation direction H1 and in the vicinity of the side surfaces 21a. This allows the air near the side openings 21b of each chiller unit 20 to be efficiently cooled. Therefore, the air introduced into the casing 21 of each chiller unit 20 can be efficiently cooled, and the cooling efficiency of the chiller system 1A can be improved.

In addition, because the nozzles 34 of the two second sprinkler pipes 32 are offset from each other in the direction along the side surface 21a, the second sprinkler pipes 32 and the nozzles 34 do not interfere with each other. This makes it possible to efficiently arrange the chiller units 20 without leaving any unnecessary gaps. This results in an overall space-saving chiller system 1A.

In addition, the chiller system 1A according to the second embodiment of the present disclosure is configured such that the amount of water sprayed from the second sprinkler pipe 32 is less than the amount of water sprayed from the first sprinkler pipe 31. This allows the cooling capacities of the first sprinkler pipe 31 and the second sprinkler pipe 32 to be uniform. This allows the cooling efficiency of the chiller system 1A to be homogenized.

Other Embodiments
Although the embodiments of the present disclosure have been described above in detail with reference to the drawings, the specific configurations are not limited to those of the embodiments, and addition, omission, substitution, and other modifications of the configurations are possible within the scope of the gist of the present disclosure. Furthermore, the present disclosure is not limited to the embodiments, but is limited only by the claims.

In the above embodiment, the number of first main pipes 31a and second main pipes 32a is specified, but this is not limited to the above. For example, two or more first sprinkler pipes 31 and three or more second sprinkler pipes 32 may be provided to increase the cooling efficiency of the chiller system 1, 1A.

In addition, the first main pipe 31a, the second main pipe 32a, the supply pipe 33, and the nozzle 34 are made of metal in the above embodiment, but may be made of polyvinyl chloride.

The nozzles 34 may also be provided at equal intervals on the first main pipe 31a and the second main pipe 32a. This allows the air on the side surface 21a of the chiller unit 20 and in the vicinity of the side surface 21a to be cooled evenly.

Although the nozzle 34 is a fan-shaped nozzle, a circular nozzle may be used in which the cooling water is sprayed in a cone-like shape extending downward in the vertical direction from the nozzle 34 outlet.

In addition, in the above embodiment, the outlet of the nozzle 34 is formed so that the central angle of the sector, which is the water spray range in the depth direction H2 when viewed from the parallel installation direction H1, is 80° to 100°, preferably 90°, but is not limited to the above angle, and the nozzle 34 may be designed with any suitable water spray range.

In addition, the two second main pipes 32a present in the gap S defined between the side surfaces 21a of the chiller units 20 facing each other in the parallel installation direction H1 may be offset from each other in the up-down direction along the side surfaces 21a, although this is not shown. More specifically, when viewed from the depth direction H2, of the two second main pipes 32a present in the gap S, the second main pipe 32a present on one side in the parallel installation direction H1 may be located higher than the second main pipe 32a present on the other side. In other words, the positions of the nozzles 34 provided on the two second main pipes 32a may be offset from each other in the direction along the side surfaces 21a.

FIG. 5 shows a modified example of the first sprinkler pipe 31 and the second sprinkler pipe 32 of the chiller system 1 of the first embodiment, and FIG. 6 shows a modified example of the first sprinkler pipe 31 and the second sprinkler pipe 32 of the chiller system 1A of the second embodiment.
5 and 6, the first sprinkler pipe 31 and the second sprinkler pipe 32 may have a plurality of nozzles 35 capable of sprinkling water upward, in addition to the nozzle 34 capable of sprinkling water downward. Furthermore, it is preferable that the nozzles 34 and the nozzles 35 are alternately present in the depth direction H2.
This makes it possible to cool not only the air on and near the side surface 21a of the chiller unit 20, but also the air near the top opening 21c. Therefore, the air flowing from near the top opening 21c toward the side opening 21b and into the casing 21 can also be cooled, further improving the cooling efficiency of the chiller system 1.
Further, the first sprinkler pipe 31 and the second sprinkler pipe 32 may have a plurality of nozzles 35 capable of sprinkling water upward, instead of the nozzles 34 capable of sprinkling water downward. Even in this case, the water sprinkled upward is redirected downward, and the air near the upper opening 21c, the side surface 21a, and the air near the side surface 21a can be cooled.

In addition, when the first sprinkler pipe 31 and the second sprinkler pipe 32 have nozzles 35, the first sprinkler pipe 31 and the second sprinkler pipe 32 may be provided, for example, between the upper and lower ends of the casing 21, at a position facing the side opening 21b. This allows water to be evenly supplied to the side surface 21a and the space near the side surface 21a, and the air near the side surface 21a can be effectively cooled.

<Additional Notes>
The chiller system 1, 1A described in the embodiment can be understood, for example, as follows.

(1) The chiller system 1 according to the first aspect includes a chiller group 10 having a plurality of chiller units 20 arranged side by side with horizontal spacing therebetween, and each chiller unit 20 has a casing 21 having a pair of side surfaces 21a with side openings 21b formed on both sides of the arrangement direction H1, a heat exchanger 23 provided within the casing 21, and a fan 22 that introduces air into the casing 21 from the side openings 21b, and is arranged along each side surface 21a in the depth direction of the side surface 21a. H2 and includes a sprinkler device 30 having a plurality of sprinkler tubes capable of supplying water to each side surface 21a via a nozzle 34. The plurality of sprinkler tubes include a first sprinkler tube 31 extending along the side surface 21a at the end of the chiller group 10 in the parallel installation direction H1, and a second sprinkler tube 32 extending along the side surfaces 21a between the side surfaces 21a of adjacent chiller units 20 and capable of supplying water to both of the side surfaces 21a by spraying water into the gap S between the side surfaces 21a.

According to the above configuration, the first sprinkler pipe 31 sprinkles water through the nozzle 34 onto the side 21a at the end in the parallel installation direction H1 and the space near the side 21a, and the second sprinkler pipe 32 sprinkles water through the nozzle 34 onto the gap S defined between the side surfaces 21a of adjacent chiller units 20. This makes it possible to cool the air introduced into the casing 21 of each chiller unit 20 from both sides in the parallel installation direction H1.

(2) The chiller system 1 according to the second aspect is the chiller system 1 according to (1), in which only one of the multiple chiller units 20 at an end on one side of the parallel installation direction H1 is provided with a pair of sprinkler pipes corresponding to a pair of side surfaces 21a of the one chiller unit 20, and another chiller unit 20 other than the one chiller unit 20 among the multiple chiller units 20 may be provided with a single sprinkler pipe corresponding to only the side surface 21a on the other side of the pair of side surfaces 21a of the other chiller unit 20 in the parallel installation direction H1.

This allows multiple chiller units 20 to be arranged continuously in the parallel installation direction H1, and the distance between two adjacent chiller units 20 can be kept to a width sufficient to allow the second sprinkler pipe 32 and nozzle 34 to be present.
In addition, since a second water sprinkler pipe 32 is provided only on the other side 21a of the pair of side surfaces 21a of the other chiller unit 20 in the parallel installation direction H1, it is possible to arrange rows of chiller units 20 using the same arrangement method when arranging multiple chiller units 20 continuously in the parallel installation direction H1.

(3) The chiller system 1 according to the third aspect is the chiller system 1 according to (2), in which the amount of water sprayed from each second spray pipe 32 may be greater than the amount of water sprayed from the first spray pipe 31.

This allows the cooling capacity of the first sprinkler pipe 31 and the second sprinkler pipe 32 to be aligned.

(4) The chiller system 1A according to the fourth aspect is the chiller system 1 of (1), in which a pair of sprinkler pipes are provided corresponding to a pair of side surfaces 21a of each of the plurality of chiller units 20, so that two second sprinkler pipes 32 are provided between the side surfaces 21a of adjacent chiller units 20, and the positions of the nozzles 34 of these two second sprinkler pipes 32 may be offset from each other in the direction along the side surfaces 21a.

This allows water to be sprayed evenly and thoroughly into the gaps S partitioned between the side surfaces 21a of adjacent chiller units 20, as well as into the side surfaces 21a at the ends in the parallel installation direction H1 and the spaces near the side surfaces 21a, thereby efficiently cooling the air introduced into the casing 21 of each chiller unit 20.
In addition, since the positions of the two second sprinkler pipes 32 and the nozzles 34 are offset from each other in the direction along the side surface 21a, the second sprinkler pipes 32 and the nozzles 34 do not interfere with each other, making it possible to efficiently arrange the rows of chiller units 20 without any unnecessary gaps.

(5) The chiller system 1A according to the fifth aspect is the chiller system 1 according to (4), in which the positions of the nozzles 34 of the two second sprinkler pipes 32 may be offset from each other in the depth direction H2.

This makes it possible to optimize the range in the depth direction H2 over which the second sprinkler pipe 32 and the nozzle 34 spray water and cool.
In addition, since the positions of the two second sprinkler pipes 32 and the nozzles 34 are offset from each other in the depth direction H2, the second sprinkler pipes 32 and the nozzles 34 do not interfere with each other, making it possible to efficiently arrange the rows of chiller units 20 without any unnecessary gaps.

(6) The chiller system 1A according to the sixth aspect is the chiller system 1 according to (4) or (5), in which the amount of water sprayed from each second spray pipe 32 may be less than the amount of water sprayed from the first spray pipe 31.

This allows the cooling capacity of the first sprinkler pipe 31 and the second sprinkler pipe 32 to be aligned.

(7) The chiller system 1, 1A according to the seventh aspect includes a chiller group 10 having a plurality of chiller units 20 arranged side by side with horizontal spacing, each chiller unit 20 having a casing 21 with a pair of side surfaces 21a with side openings 21b formed on both sides of the arrangement direction H1, a heat exchanger 23 provided within the casing 21, and a fan 22 for introducing air into the casing 21 from the side openings 21b, and further includes a sprinkler device 30 provided corresponding to each chiller unit 20 and having a plurality of sprinkler tubes capable of spraying water via nozzles 34 onto the side surfaces 21a of the corresponding chiller unit 20, each sprinkler tube being capable of spraying water onto an area of another chiller unit 20 adjacent to the corresponding chiller unit 20 so as to supplement the area not sprayed with water.

As a result, each sprinkler pipe sprinkles water via nozzle 34 onto side surface 21a at the end in the parallel installation direction H1, the space near the side surface 21a, and the gap S defined between the side surfaces 21a. In addition, sprinkler pipes extend between the side surfaces 21a of adjacent chiller units 20 along the depth direction H2, and nozzles 34 of the sprinkler pipes corresponding to each chiller unit 20 are present so as to be able to spray water in a mutually complementary manner. This makes it possible to efficiently cool the air introduced into the casing 21 of each chiller unit 20.
Furthermore, with the above-described configuration, the sprinkler pipes and the nozzles 34 do not interfere with each other, so that a plurality of chiller units 20 can be efficiently arranged without any unnecessary gaps.

1, 1A...Chiller system 10...Chiller group 20...Chiller unit 21...Casing 21a...Side 21b...Side opening 21c...Upper opening 22...Fan 22a...Blade 22b...Motor 23...Heat exchanger 24...Base 30...Sprinkler system 31...First sprinkler pipe 31a...First main pipe 32...Second sprinkler pipe 32a...Second main pipe 33...Supply pipe 34, 35...Nozzle O...Central axis S...Gap F...Air flow H1...Parallel installation direction H2...Depth direction G...Installation surface

Claims (2)

A chiller group including a plurality of chiller units arranged side by side at intervals in a horizontal direction,
Each of the chiller units includes a casing having a pair of side surfaces on both sides of the juxtaposition direction, a heat exchanger provided in the casing, and a fan that introduces air into the casing from the side openings,
Further, a water sprinkler device is provided having a plurality of water sprinkler pipes extending along each of the side surfaces in a depth direction of the side surfaces and capable of supplying water to each of the side surfaces through a nozzle,
The plurality of water sprinkler pipes include
A first sprinkler pipe extending along a side surface of an end portion of the chiller group in the parallel installation direction;
a second water sprinkler pipe extending along the side surfaces between the side surfaces of the adjacent chiller units and capable of supplying water to both of the side surfaces by sprinkling water into a space between the side surfaces;
Including,
Among the plurality of chiller units, only one of the chiller units at one end in a parallel arrangement direction is provided with a pair of sprinkler pipes corresponding to a pair of side surfaces of the one chiller unit,
A chiller system in which a sprinkler pipe is provided in each of the chiller units other than the one chiller unit among the plurality of chiller units so as to correspond only to the other side of the pair of side surfaces of the other chiller unit in the parallel installation direction . The chiller system according to claim 1 , wherein the amount of water sprayed from each of the second spray pipes is greater than the amount of water sprayed from each of the first spray pipes.

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