WO2018116938A1 - Refrigeration cycle device - Google Patents

Abstract

This refrigeration cycle device has: a lower section; an upper section separably connected to the lower section; a partition base affixed to the lower end of the upper section; and a fan device capable of discharging heat generated by a heat generation component. The fan device is provided with: a heat discharge fan unit capable of generating an air flow; and a duct unit comprising a discharge section capable of discharging heat by means of the air flow. The duct unit is provided with: an upper duct disposed on the upper side of the partition base; and a lower duct disposed on the lower side of the partition base. The series of discharge sections are configured by connecting the upper section to the lower section through the partition base.

Description

Refrigeration cycle equipment

Embodiments of the present invention relate to a refrigeration cycle apparatus provided with an electrical box, and to a refrigeration cycle apparatus excellent in heat exhaustion and assembly of the electrical box.

A refrigeration cycle apparatus such as an air-cooled heat pump chilling unit that generates cold water or hot water includes a housing having a machine room. For example, the machine room has an elongated shape extending in the depth direction of the chilling unit, and various refrigeration cycle components including a water heat exchanger are accommodated in the machine room.

In the machine room of the refrigeration cycle apparatus, an electrical box for operating refrigeration cycle components and the like is provided. A large number of electrical components that generate heat are accommodated inside the electrical box. The electrical box is provided with a duct, a heat exhaust fan, and the like for exhausting heat from such electrical components.

JP 2014-178113 A JP-A-3-282178

In the conventional chilling unit, the exhaust heat in the electrical unit can be secured even if the fan for the air heat exchange unit stops, the maintenance of the exhaust heat configuration is easy, and the housing of the air heat exchange unit It is required to be easy to assemble.

An object of the present invention is to obtain a refrigeration cycle apparatus excellent in exhaust heat (maintenance) and assemblability.

In the embodiment, the refrigeration cycle apparatus is capable of exhausting hot air generated from a heat generating component, a lower section, an upper section that is detachably connected to the lower section, a partition base that is fixed to a lower end of the upper section, and And a fan device. The fan device includes an exhaust heat fan unit capable of generating an air flow, and a duct unit configured with a blowout portion capable of exhausting hot air by the air flow. The duct unit includes an upper duct disposed on the upper side of the partition base and a lower duct disposed on the lower side of the partition base. By connecting the upper section to the lower section via the partition base, a series of blowing portions is configured.

FIG. 1 is a perspective view of an air-cooled heat pump chilling unit according to an embodiment. FIG. 2 is a side view of the air-cooled heat pump chilling unit according to the embodiment. FIG. 3 is a perspective view showing the positional relationship between the machine room containing the first refrigeration cycle unit, the second refrigeration cycle unit, the water circuit and the electrical unit and the drain pan. FIG. 4 is a plan view showing the positional relationship between the first refrigeration cycle unit, the second refrigeration cycle unit, the water circuit, and the electrical unit housed in the machine room. FIG. 5 is a circuit diagram showing a refrigeration cycle of the air-cooled heat pump chilling unit according to the embodiment. FIG. 6 is an exploded perspective view showing an air heat exchange unit used in the air-cooled heat pump chilling unit according to the embodiment. FIG. 7 is a rear view of the air-cooled heat pump chilling unit as seen from the direction of arrow F7 in FIG. FIG. 8 is a schematic cross-sectional view showing the positional relationship among the electrical unit, drain pan, and air heat exchange unit of the air-cooled heat pump chilling unit according to the embodiment. FIG. 9 is a perspective view of the air-cooled heat pump chilling unit according to the embodiment. FIG. 10 is a perspective view showing an arrangement configuration of the duct unit and the exhaust heat fan unit. FIG. 11 is a perspective view illustrating an arrangement configuration of the partition base and the duct unit in the embodiment. FIG. 12 is an enlarged perspective view showing the inside of the frame F14 in FIG. FIG. 13 is a front view showing an arrangement configuration of the partition base and the duct unit in FIG. 11. FIG. 14 is a front view showing that the air heat exchange unit and the housing can be separated in the embodiment. 15 is a perspective view of the duct unit of FIG. 14 as viewed from the surface side of the partition base. 16 is a perspective view of the duct unit of FIG. 14 viewed from the back side of the partition base.

Hereinafter, an embodiment will be described with reference to the drawings.

FIG. 1 is a perspective view of an air-cooled heat pump chilling unit 1 that generates, for example, cold water or hot water, and FIG. 2 is a side view of the air-cooled heat pump chilling unit 1.

The air-cooled heat pump chilling unit 1 is an example of a refrigeration cycle apparatus that can be operated in a cooling mode and a heating mode, for example, and can be rephrased as an air-cooled heat pump heat source machine. In the following description, the air-cooled heat pump chilling unit 1 is simply referred to as a chilling unit 1.

As shown in FIGS. 1 to 4, the chilling unit 1 includes a housing 2, a first refrigeration cycle unit 3, a second refrigeration cycle unit 4, a water circuit 5, and an electrical unit 6 as main elements. . Here, FIGS. 1 to 3 show a state in which the panels covering the front, back and left and right side surfaces of the housing 2 are removed.

The housing 2 is installed on a horizontal installation surface G such as the roof of a building. The casing 2 is formed in an elongated hollow box shape whose depth dimension is much larger than the width dimension.

As shown in FIGS. 2 to 4, the housing 2 includes a main frame 7. The main frame 7 includes a lower frame 8, an upper frame 9 and a plurality of vertical bars 10. The lower frame 8 and the upper frame 9 are elongated rectangular shapes extending in the depth direction of the housing 2. The length L1 of the lower frame 8 along the depth direction of the housing 2 is shorter than the length L2 of the upper frame 9 along the depth direction of the housing 2. Further, the length L3 of the upper frame 9 along the width direction of the housing 2 is shorter than the length L4 of the lower frame 8 along the width direction of the housing 2.

The vertical beam 10 is an element that connects the lower frame 8 and the upper frame 9, and is arranged at intervals in the depth direction of the housing 2. The vertical rails 10 facing the width direction of the housing 2 are inclined so as to approach each other as they proceed from the lower frame 8 to the upper frame 9.

For this reason, as shown in FIGS. 1 and 3, when the housing 2 is viewed from the front direction F and the back direction R, the main frame 7 moves from the lower frame 8 toward the upper frame 9. It is formed in a tapered shape such that the dimension along the width direction is gradually narrowed.

The bottom plate 13 is fixed on the lower frame 8. Here, the bottom plate 13 is a plurality of sheet metal members on which the first refrigeration cycle unit 3, the second refrigeration cycle unit 4, the electrical unit 6, and a pump unit having a spiral pump 45 described later are placed. . Each of these units 3, 4, 6 and the centrifugal pump 45 is configured to be fixed to the main frame 7.

Furthermore, the right side surface, the left side surface, the front surface, and the back surface of the main frame 7 are each covered with a plurality of panels (not shown). The bottom plate 13 defines a machine room 14 inside the housing 2 in cooperation with the panel. The bottom plate 13 constitutes the bottom of the machine room 14. The machine room 14 extends over the entire length along the depth direction of the housing 2.

According to the present embodiment, the front end of the lower frame 8 and the front end of the upper frame 9 positioned on the front side of the housing 2 are positioned along the depth direction of the housing 2 so as to be aligned in the height direction of the housing 2. Are aligned with each other. On the back side of the housing 2, the upper frame 9 projects horizontally beyond the lower frame 8 toward the back of the housing 2. The depth direction of the housing 2 can be restated as the longitudinal direction of the housing 2.

As shown in FIG. 5, the first refrigeration cycle unit 3 includes a first refrigerant circuit RA and a second refrigerant circuit RB that are independent of each other. Similarly, the second refrigeration cycle unit 4 includes a third refrigerant circuit RC and a fourth refrigerant circuit RD that are independent of each other.

Since the first to fourth refrigerant circuits RA, RB, RC, and RD have a common configuration, the first refrigerant circuit RA will be described as a representative, and the second to fourth refrigerant circuits RB, RC, RD, About RD, the same referential mark is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 5, the first refrigerant circuit RA includes a variable capacity hermetic compressor 20, a four-way valve 21, an air heat exchange unit 22, a pair of expansion valves 23a and 23b, a receiver 24, and a water heat exchanger. 25 and the gas-liquid separator 26 are provided as main elements. The plurality of elements are examples of refrigeration cycle components and are connected via a circulation circuit 27 in which the refrigerant circulates.

More specifically, the discharge port of the hermetic compressor 20 is connected to the first port 21 a of the four-way valve 21. The second port 21 b of the four-way valve 21 is connected to the air heat exchange unit 22. As shown in FIG. 6, the air heat exchange unit 22 of the present embodiment includes a pair of air heat exchangers 29 a and 29 b and a fan 30.

The air heat exchangers 29a and 29b include a plurality of plate fins and a plurality of refrigerant pipes penetrating the plate fins. The air heat exchangers 29a and 29b are erected so as to face each other with a gap in the width direction of the housing 2, and are inclined to move away from each other as they move upward.

Further, both end portions of the air heat exchangers 29a and 29b along the depth direction of the casing 2 are bent in the width direction of the casing 2 so as to face each other. A gap between both ends of the air heat exchangers 29a and 29b is closed by a pair of shielding plates 32a and 32b. A cylindrical space surrounded by the air heat exchangers 29a and 29b and the shielding plates 32a and 32b defines an exhaust passage 33 extending in the vertical direction.

The fan 30 includes a fan motor 35 that rotates the impeller 34 and a fan cover 37 that surrounds the impeller 34. The fan motor 35 is supported by a fan base 36 straddling between the upper ends of the air heat exchangers 29a and 29b. The fan cover 37 has a cylindrical exhaust port 38 facing the impeller 34.

When the fan 30 is driven, the air around the chilling unit 1 passes through the air heat exchangers 29a and 29b and is sucked into the exhaust passage 33. The air sucked into the exhaust passage 33 is sucked up toward the exhaust port 38 and discharged from the exhaust port 38 toward the upper side of the air heat exchangers 29a and 29b.

Since the chilling unit 1 of the present embodiment includes the first to fourth refrigerant circuits RA, RB, RC, and RD, there are four sets of air heat exchange units 22. The four air heat exchange units 22 are fixed in an upright posture on the upper frame 9 of the main frame 7 and are arranged in a line along the depth direction of the housing 2. Therefore, in this embodiment, the four sets of air heat exchange units 22 are located directly above the machine room 14.

The air heat exchanging portion 22 is formed in a V shape that expands in the width direction of the casing 2 as it goes upward of the casing 2 when the casing 2 is viewed from the front direction F and the rear direction R. Has been. Therefore, the chilling unit 1 in which the air heat exchanging part 22 is positioned on the housing 2 has a drum-shaped shape in which an intermediate part along the height direction is constricted.

Further, in the air heat exchange unit 22 positioned on the front end along the depth direction of the housing 2, one bent end of the air heat exchangers 29 a and 29 b is in the direction F on the front surface of the housing 2. Exposed. Similarly, in the air heat exchanger 22 positioned on the rear end along the depth direction of the housing 2, the bent one ends of the air heat exchangers 29 a and 29 b are in the direction of the back surface of the housing 2. Exposed to R. In other words, one end of the two sets of air heat exchangers 29a and 29b positioned at both ends along the arrangement direction of the plurality of air heat exchange units 22 is a heat exchange surface exposed around the chilling unit 1. It has become.

By adopting this configuration, the two air heat exchange units 22 positioned on the front end portion and the rear end portion of the casing 2 can be used in addition to the air sucked from the width direction of the chilling unit 1, respectively. Heat exchange can be performed using the air sucked from the front direction F and the rear direction R of the body 2.

As best shown in FIG. 2, the upper frame 9 of the main frame 7 projects horizontally toward the back of the housing 2 rather than the lower frame 8. Of the four sets of air heat exchanging units 22, the rearmost air heat exchanging unit 22 located at the rear end of the housing 2 protrudes from the rear end of the housing 2 in the depth direction of the housing 2. Yes. Therefore, the total length along the depth direction of the housing 2 is shorter than the total length along the alignment direction of the four air heat exchange units 22.

As a result, a stepped portion 43 that is recessed from the rearmost air heat exchanging portion 22 is formed behind the housing 2. The stepped portion 43 defines a space S1 that is continuously open to the side and the back of the housing 2, and the rearmost air heat exchanging portion 22 projects over the space S1.

In the present embodiment, the vertical beam 10 disposed at the rear end of the housing 2 is located at the center along the depth direction of the air heat exchangers 29a and 29b constituting the rearmost air heat exchange unit 22 or at the center rather than the center. Located behind the body 2. Thereby, the air heat exchangers 29a and 29b, which are heavy objects, can be stably supported by the main frame 7.

As shown in FIG. 5, the inlets of the air heat exchangers 29 a and 29 b are connected in parallel to the second port 21 b of the four-way valve 21. The outlets of the air heat exchangers 29a and 29b are connected to the third port 21c of the four-way valve 21 via the expansion valves 23a and 23b, the receiver 24, and the water heat exchanger 25. The fourth port 21 d of the four-way valve 21 is connected to the suction side of the hermetic compressor 20 via a gas-liquid separator 26.

Furthermore, the outlet of the gas-liquid separator 26 is connected to the first port 21a of the four-way valve 21 via the bypass pipe 40. A normally closed solenoid valve 41 is provided in the middle of the bypass pipe 40.

As shown in FIG. 5, the water heat exchanger 25 includes a first refrigerant channel 25a, a second refrigerant channel 25b, and a water channel 25c. The first refrigerant flow path 25 a of the water heat exchanger 25 is connected to the receiver 24 and the third port 21 c of the four-way valve 21. The second refrigerant flow path 25b is connected to the receiver 24 of the second refrigerant circuit RB and the third port 21c of the four-way valve 21. Therefore, in the first refrigeration cycle unit 3, the first refrigerant circuit RA and the second refrigerant circuit RB share one water heat exchanger 25.

Similarly, in the second refrigeration cycle unit 4, the third refrigerant circuit RC and the fourth refrigerant circuit RD are connected in parallel to one water heat exchanger 25 so as to share one water heat exchanger 25. Has been. Therefore, the chilling unit 1 is equipped with two water heat exchangers 25.

As shown in FIGS. 1 to 4, the various elements of the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4 except for the four air heat exchange units 22 are the machine room of the housing 2. 14.

As best shown in FIG. 4, the first refrigeration cycle unit 3 including the first refrigerant circuit RA and the second refrigerant circuit RB includes, for example, a machine room 14 when the housing 2 is viewed in a plan view. It is arranged in the latter half along the depth direction. Similarly, the second refrigeration cycle unit 4 including the third refrigerant circuit RC and the fourth refrigerant circuit RD is, for example, a front half portion along the depth direction of the machine room 14 when the housing 2 is viewed in a plan view. Is arranged.

More specifically, the two hermetic compressors 20, the two receivers 24, and the two gas-liquid separators 26 constituting the first refrigerant circuit RA and the second refrigerant circuit RB are each in a machine room. 14 is installed on the bottom plate 13 so as to be aligned in the depth direction of the machine room 14. Further, the two hermetic compressors 20 and the two gas-liquid separators 26 are arranged adjacent to each other in the width direction of the machine chamber 14.

One water heat exchanger 25 shared by the first refrigerant circuit RA and the second refrigerant circuit RB is installed on the bottom plate 13 so as to be located behind the two gas-liquid separators 26. Therefore, the water heat exchanger 25 is located at the rearmost part of the first refrigeration cycle unit 3.

The two hermetic compressors 20, the two receivers 24, and the two gas-liquid separators 26 constituting the third refrigerant circuit RC and the fourth refrigerant circuit RD are respectively in the first half of the machine room 14, It is installed on the bottom plate 13 so as to line up in the depth direction of the machine room 14. Further, the two hermetic compressors 20 and the two gas-liquid separators 26 are arranged adjacent to each other in the width direction of the machine chamber 14.

One water heat exchanger 25 shared by the third refrigerant circuit RC and the fourth refrigerant circuit RD is installed on the bottom plate 13 so as to be located behind the two gas-liquid separators 26. Therefore, the water heat exchanger 25 is located at the rearmost part of the second refrigeration cycle unit 4.

For this reason, the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4 are arranged in the depth direction of the machine room 14. At the same time, the two water heat exchangers 25 are separated from each other in the depth direction of the machine room 14.

As shown in FIGS. 1 to 3, the water heat exchanger 25 has a square box shape and is erected from the bottom plate 13 of the housing 2 in the height direction of the machine room 14. Each water heat exchanger 25 has a water inlet 28a and a water outlet 28b. The water inlet 28 a and the water outlet 28 b are located on the left side surface of the water heat exchanger 25 when the housing 2 is viewed from the front direction F.

The water inlet 28a is connected to the upstream end of the water passage 25c at the upper end of the left side surface of the water heat exchanger 25. The water outlet 28b is connected to the downstream end of the water flow path 25c at the lower end of the left side surface of the water heat exchanger 25. Therefore, the water inlet 28 a is located at the upper end portion of the machine room 14. The water that has flowed into the water channel 25c from the water inlet 28a flows from the top to the bottom along the direction of gravity in the water channel 25c.

As shown in FIGS. 1 to 4, the water circuit 5 is housed in the machine room 14 together with the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4. The water circuit 5 includes a variable capacity centrifugal pump 45 and first to fourth water pipes 46a, 46b, 46c, and 46d as main elements.

The centrifugal pump 45 is installed on the bottom plate 13 so as to be located at the rear end of the machine room 14. The centrifugal pump 45 is adjacent to one water heat exchanger 25 shared by the first refrigerant circuit RA and the second refrigerant circuit RB at the rear end of the machine chamber 14.

As shown in FIG. 7, the centrifugal pump 45 includes a casing 49 and a motor 50 which is an example of a power unit. The casing 49 has a suction port 51 and a discharge port 52 and houses an impeller 53. The suction port 51 and the discharge port 52 are opened in a direction orthogonal to the casing 49. The rotating shaft 54 of the motor 50 passes through the casing 49 and is coaxially connected to the impeller 53.

The spiral pump 45 has a rotation axis O <b> 1 that passes through the center of the rotation shaft 54 of the motor 50. The spiral pump 45 is housed in the machine room 14 in a horizontal posture such that the rotation axis O1 is horizontal. According to the present embodiment, the rotation axis O <b> 1 of the centrifugal pump 45 extends in the width direction of the housing 2.

The suction port 51 of the casing 49 is located on the axis of the rotation axis O1. The suction port 51 is opened toward the left side of the casing 2 in the machine room 14 when the casing 2 is viewed from the rear direction R. The discharge port 52 that is in a positional relationship orthogonal to the suction port 51 is opened upward at the upper end portion of the casing 49 so as to be along the vertical direction. Further, the water inlet 28 a of the water heat exchanger 25 adjacent to the spiral pump 45 is located above the discharge port 52.

As shown in FIG. 3, a drain pan 60 is disposed between the machine room 14 of the housing 2 and the four air heat exchange units 22. The drain pan 60 is an element that receives dew condensation water or the like dripping from the air heat exchangers 29 a and 29 b of the air heat exchanger 22, and includes a pair of troughs 61 a and 61 b and a drain collection board 62.

The casings 61a and 61b extend straight along the arrangement direction of the four sets of air heat exchangers 22, and are positioned directly below the air heat exchangers 29a and 29b of the air heat exchangers 22. 2 is supported by the upper frame 9.

The cages 61a and 61b are arranged on the machine room 14 in parallel with each other in the width direction of the housing 2. The machine room 14 is communicated with the exhaust passages 33 of the four air heat exchange units 22 through a gap between the flanges 61a and 61b.

The drain collection board 62 is supported by the upper frame 9 so as to straddle between the rear ends of the flanges 61a and 61b. The drain collection board 62 is located immediately above the centrifugal pump 45. The rear end portion of the drain collecting board 62 protrudes above the stepped portion 43 behind the housing 2. Further, the drain collection board 62 has a drain pipe connection port 64 opened to the step portion 43. As shown in FIGS. 2 to 4, the drain pipe connection port 64 is disposed at the rear end portion of the drain collection board 62 that protrudes above the stepped portion 43 behind the housing 2. Further, as shown in FIG. 2, the drain pipe connection port 64 has an opening protruding downward, so that the drain pipe can be connected downward outside the housing. This facilitates connection work and maintenance.

In addition, as described above, the drain collection board 62 protrudes above the stepped portion 43 behind the housing 2, so that removal and maintenance are easy.

As shown in FIGS. 1 to 4, the electrical unit 6 is installed at the front end of the machine room 14 on the front side of the housing 2. The electrical unit 6 of this embodiment includes an electrical box 70 and a fan device 71. The electrical box 70 is fixed (supported) on the bottom plate 13 of the housing 2 and has a height dimension equivalent to that of the machine room 14.

The electrical box 70 accommodates various electrical components that control the operation (refrigeration cycle operation) of the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4. An example of the electrical component includes a plurality of control boards that control the voltage and frequency applied to the hermetic compressor 20, a plurality of power modules such as an inverter and a converter, a plurality of smoothing capacitors, a plurality of reactors for power factor improvement, A plurality of filter substrates, a plurality of terminal blocks, a plurality of electromagnetic contactors, and the like.

An air passage 74 as shown in FIG. 8 is formed inside the electrical box 70. The air passage 74 is formed between a pair of partition plates 75 a and 75 b that divide the interior of the electrical box 70. The air passage 74 extends in the depth direction of the housing 2 at the central portion along the width direction of the electrical box 70 and is erected along the height direction of the electrical box 70.

The lower end of the air passage 74 is opened at the bottom of the electrical box 70 and communicates with an intake hole 76 opened in the bottom plate 13 of the housing 2. The intake hole 76 communicates with a gap g between the bottom plate 13 and the installation surface G. The upper end of the air passage 74 is opened on the upper surface of the electrical box 70.

Among various electrical components, for example, a plurality of control boards and a plurality of power modules can be rephrased as heat generating components 78 that generate a large amount of heat during operation. Since the heat generating component 78 requires active heat dissipation, it is thermally connected to a plurality of heat sinks 79. The heat sink 79 is exposed to the air passage 74 inside the electrical box 70. The air passage 74 is positioned at the center of the electrical box 70 and is erected so as to penetrate the electrical box 70 in the height direction. The air passage 74 is opened on the upper surface of the electrical box 70.

3 and 4, the fan device 71 is attached to the upper surface of the electrical box 70. The electrical box 70 is supported on the bottom plate 13 of the housing 2. Thus, the fan device 71 is supported by the housing 2 via the bottom plate 13.

In this state, the fan device 71 is configured to be able to exhaust heat generated from various electric components (that is, heat generating components) in the electrical box 70. For this reason, the fan device 71 includes an elongated box-shaped duct unit 72 that is open at both ends in the vertical direction, and an exhaust heat fan unit 300 (see FIGS. 9 to 10) housed in the duct unit 72.

In the drawings, as an example, the exhaust heat fan unit 300 includes a plurality of (for example, three) electric fans 73a, 73b, and 73c. The plurality of electric fans 73 a, 73 b, 73 c are arranged in a line along the depth direction of the housing 2 (arrow F to R direction).

Here, the electric fans 73a, 73b, 73c are driven. Thereby, an air flow is generated inside the electrical box 70. As a result, the hot air inside the electrical box 70 is exhausted to the outside by the air flow through the blowout part 301 (see FIG. 10) of the duct unit 72 described later. Thus, the exhaust heat fan unit 300 (fan device 71) is configured to be capable of cooling (air cooling) the inside of the electrical box 70.

Further, the duct unit 72 (fan device 71, exhaust heat fan unit 300) is provided in the central portion of the upper surface of the electrical box 70. The duct unit 72 (that is, the exhaust heat fan unit 300) is provided to face the opening of the air passage. The duct unit 72 is configured to surround the opening of the air passage.

The exhaust heat fan unit 300 (electric fans 73a, 73b, 73c) is housed and arranged in the middle part of the duct unit 72 in the vertical direction.

The lower end of the duct unit 72 is positioned in a state where it partially enters the interior of the electrical box 70. The upper end of the duct unit 72 is positioned in a state in which it partially enters the exhaust passage 33 (see FIG. 6) of the air heat exchanging section 22 through between the flanges 61a and 61b. In other words, the duct unit 72 is configured to be able to communicate (connect) the inside of the electrical box 70 and the outside of the electrical box 70.

The duct unit 72 is provided with a blowing part 301. The blowing unit 301 is configured to face directly above the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c). That is, the blow-out portion 301 is configured from the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c) to the upper end of the duct unit 72. In such a configuration, the blowing part 301 is defined as an opening (blow-out opening) of the duct unit 72. Thus, the hot air in the electrical box 70 can be discharged out of the machine through the blowing part 301.

The electric fans 73a, 73b, 73c are arranged in a line at intervals in the depth direction of the housing 2. The electric fans 73a, 73b, and 73c are incorporated in the duct unit 72 in a posture in which the rotation axis is placed vertically so as to be positioned immediately above the air passage of the electrical box 70. Electric fans 73a, 73b, and 73c all exhaust toward the upper side of duct unit 72.

When the electric fans 73a, 73b, 73c operate, negative pressure acts on the air passage of the electrical box 70. Thereby, the air around the housing 2 is sucked into the air passage from the bottom plate 13 side of the housing 2. The sucked air flows through the air passage from the bottom to the top and is guided to the duct unit 72.

¡The heat sink that receives the heat from the heat generating parts is directly exposed to the air flowing through the air passage. Thereby, the heat of the heat generating component transmitted to the heat sink is released by multiplying the air flow, and the heat generating component is forcibly cooled.

The air that has passed through the air passage is sucked up by the electric fans 73a, 73b, and 73c, and is discharged from the blowing portion 301 of the duct unit 72 to the exhaust passage 33 of the frontmost air heat exchanging portion 22.

The air discharged into the exhaust passage 33 is sucked up together with the air that has passed through the air heat exchangers 29a and 29b by the operation of the fan 30, and is discharged from the exhaust port 38 to the upper side of the chilling unit 1. Therefore, the air after cooling the heat-generating component does not stay in the machine room 14, and the temperature rise of the machine room 14 can be avoided.

In the chilling unit 1 of the present embodiment, it is possible to appropriately select spiral pumps having different fixed amounts so that, for example, the maximum water flow rate and maximum head required by the unit can be covered.

Next, the operation of the chilling unit 1 will be described.
When the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4 start operation in the cooling mode, the four-way valves 21 of the first to fourth refrigerant circuits RA, RB, RC, RD are shown by solid lines in FIG. As shown, the first port 21a is switched to communicate with the second port 21b, and the third port 21c is switched to communicate with the fourth port 21d.

Furthermore, high-temperature and high-pressure gas-phase refrigerant is discharged from the first to fourth refrigerant circuits RA, RB, RC, and RD into the circulation circuit 27. The high-temperature and high-pressure gas-phase refrigerant discharged from the hermetic compressor 20 is guided to the air heat exchangers 29a and 29b via the four-way valve 21.

The gas-phase refrigerant led to the air heat exchangers 29a and 29b is condensed by heat exchange with the air passing through the air heat exchangers 29a and 29b by the operation of the fan 30, and is changed into a high-pressure liquid-phase refrigerant. The high-pressure liquid-phase refrigerant is depressurized in the process of passing through the expansion valves 23a and 23b, and changes to an intermediate-pressure gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant is guided to the water heat exchanger 25 via the receiver 24.

In the present embodiment, the first refrigerant circuit RA and the second refrigerant circuit RB share one water heat exchanger 25, and the third refrigerant circuit RC and the fourth refrigerant circuit RD share one other water heat. The exchanger 25 is shared. For this reason, in the first refrigerant circuit RA and the second refrigerant circuit RB, a gas-liquid two-phase refrigerant having an intermediate pressure is supplied to the first refrigerant channel 25a and the second refrigerant channel 25b of the water heat exchanger 25, respectively. It is guided and exchanges heat with water flowing through the water flow path 25c.

As a result, the gas-liquid two-phase refrigerant flowing in the first refrigerant flow path 25a and the second refrigerant flow path 25b evaporates and receives heat from the water in the water flow path 25c, and the low-temperature and low-pressure gas-liquid is generated by latent heat of evaporation. Change to two-phase refrigerant. The water in the water flow path 25c becomes cold water by removing latent heat.

The water flow path 25c of the water heat exchanger 25 shared by the first refrigerant circuit RA and the second refrigerant circuit RB is connected to the third refrigerant circuit RC and the fourth refrigerant circuit RD via the third water pipe 46c. The other water heat exchanger 25 to be shared is connected in series to the water flow path 25c.

Therefore, the water cooled in the water heat exchanger 25 shared by the first refrigerant circuit RA and the second refrigerant circuit RB is the other water shared by the third refrigerant circuit RC and the fourth refrigerant circuit RD. In the process of passing through the water flow path 25c of the heat exchanger 25, it is cooled again by heat exchange with the gas-liquid two-phase refrigerant flowing through the first refrigerant flow path 25a and the second refrigerant flow path 25b of the water heat exchanger 25. It is. The water cooled in two stages is supplied from the fourth water pipe 46d to the utilization equipment side via the on-site pipe.

The low-temperature and low-pressure gas-liquid two-phase refrigerant that has passed through each water heat exchanger 25 is guided to the gas-liquid separator 26 via the four-way valve 21, where it is separated into a liquid-phase refrigerant and a gas-phase refrigerant. . The gas-phase refrigerant separated from the liquid-phase refrigerant is sucked into the hermetic compressor 20 and is again discharged as a high-temperature / high-pressure gas-phase refrigerant from the hermetic compressor 20 to the circulation circuit 27.

On the other hand, when the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4 start operation in the heating mode, the four-way valves 21 of the first to fourth refrigerant circuits RA, RB, RC, RD are shown in FIG. As indicated by a broken line, the first port 21a is switched to communicate with the third port 21c, and the second port 21b is switched to communicate with the fourth port 21d.

In the heating mode, the high-temperature and high-pressure gas-phase refrigerant compressed by the hermetic compressor 20 is guided to the water heat exchanger 25 via the four-way valve 21. Even in the heating mode, the water flow path 25c of one water heat exchanger 25 shared by the first refrigerant circuit RA and the second refrigerant circuit RB, and the third refrigerant circuit RC and the fourth refrigerant circuit RD are shared. Since the water flow path 25c of the other one water heat exchanger 25 is connected in series, the water flowing through the water flow path 25c is the gas phase flowing through the first refrigerant flow path 25a and the second refrigerant flow path 25b. It is heated in two stages by heat exchange with the refrigerant. The water heated by receiving the heat of the gas-phase refrigerant is supplied from the fourth water pipe 46d to the utilization equipment side via the on-site pipe.

The high-pressure liquid-phase refrigerant that has passed through the water heat exchanger 25 is changed to an intermediate-pressure gas-liquid two-phase refrigerant in the process of passing through the receiver 24 and the expansion valves 23a and 23b, and is also introduced into the air heat exchangers 29a and 29b. It is burned. The gas-liquid two-phase refrigerant guided to the air heat exchangers 29a and 29b evaporates by heat exchange with the air passing through the air heat exchangers 29a and 29b by the operation of the fan 30, and the low-temperature and low-pressure gas-liquid two-phase refrigerant Change to refrigerant.

The low-temperature and low-pressure gas-liquid two-phase refrigerant that has passed through the air heat exchangers 29a and 29b is guided to the gas-liquid separator 26 via the four-way valve 21, where it is separated into a liquid-phase refrigerant and a gas-phase refrigerant. The The gas-phase refrigerant separated from the liquid-phase refrigerant is sucked into the hermetic compressor 20 and is again discharged as a high-temperature / high-pressure gas-phase refrigerant from the hermetic compressor 20 to the circulation circuit 27.

According to the chilling unit 1 of the present embodiment, the spiral pump 45 that supplies water to the water heat exchanger 25 shared by the first refrigerant circuit RA and the second refrigerant circuit RB has a rotation axis that passes through the center of the rotation shaft 54. The casing 49 and the motor 50, which are fixed on the bottom plate 13 of the machine room 14 in a horizontal posture along the width direction of the casing 2 and accommodate the impeller 53, are arranged in the width direction of the casing 2. Lying on the bottom plate 13.

For this reason, it is possible to avoid the swirling pump 45 from projecting upward toward the upper side of the bottom plate 13, to effectively utilize the limited space in the machine room 14, and to perform air heat exchange arranged on the machine room 14. The overall height of the chilling unit 1 including the portion 22 can be kept as low as possible.

At the same time, since the spiral pump 45 is set horizontally, a sufficient piping space can be secured between the motor 50 and the drain collecting board 62, and the first water piping 26a and the A check valve 57 can be arranged.

Moreover, since the discharge port 52 of the spiral pump 45 is opened upward along the vertical direction at the upper end of the casing 49, the discharge port 52 and the water inlet 28a of the water heat exchanger 25 are connected. The second water pipe 26 b can be routed over the centrifugal pump 45.

In other words, it is not necessary to raise the second water pipe 26b through the side of the centrifugal pump 45, and the discharge port 52 and the water inlet 28a can be connected at the shortest distance. Therefore, there is an advantage that the routing route of the second water pipe 26b can be simplified, the piping work can be easily performed, and the pressure loss can be reduced.

The configuration as described above is particularly advantageous in a heat pump device that performs large-capacity heat transport such as a chilling unit. In other words, the larger the amount of heat required on the user equipment side, the larger the volume of the centrifugal pump, the water heat exchanger, and the air heat exchanger. However, the chilling unit itself is small in consideration of the installation space and the like. It is desirable to increase the amount of heat transport.

As in the chilling unit 1 of the present embodiment, the air heat exchangers 29a and 29b are arranged on the housing 2 in which the spiral pump 45 and the water heat exchanger 25 are accommodated, so that the spiral pump 45 and the water heat exchange are arranged. The space efficiency in the machine room 14 can be improved while increasing the volume of the vessel 25 and the heat exchange area of the air heat exchangers 29a and 29b. Therefore, it is possible to transport a large volume of heat while reducing the size of the heat pump device.

For example, the rotation axis of the motor of the spiral pump is not limited to be placed horizontally so as to be along the width direction of the housing, but may be placed horizontally so as to be along the depth direction of the housing. That is, the casing and the motor may be arranged side by side in the depth direction of the housing so that the casing is located behind the motor, and the suction port of the casing may be opened toward the rear of the machine room. According to this configuration, the first water pipe connected to the suction port can be drawn straight out toward the rear of the machine room. Therefore, the shape of the first water pipe can be simplified and the pressure loss can be kept low.

Furthermore, in this embodiment, the discharge port of the casing is opened upward along the vertical direction, but the opening direction of the discharge port may be slightly inclined with respect to the vertical line.

In the above-described embodiment, the exhaust heat fan unit 300 (fan device 71) generates an air flow inside the electrical box 70, and thereby, heat inside the electrical box 70 can be exhausted outside the machine (in other words, in other words) Then, the interior of the electrical box 70 is configured to be cooled (air-cooled). In such a configuration, the duct unit 72 (the fan device 71 and the exhaust heat fan unit 300) is provided in the central portion of the upper surface of the electrical box 70 (see FIGS. 3 to 4).

Thus, even when the fan 30 for the air heat exchanger 22 is stopped, the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c) can be operated independently. As a result, the exhaust heat operation for the inside of the electrical unit 6 (the electrical box 70) can be maintained or continued.

In the present embodiment, the fan device 71 is disposed above the electrical box 70. However, the fan device 71 is disposed downstream of the air passage 74 in the electrical box 70. The inside of 74 becomes a negative pressure rather than an atmospheric pressure. For this reason, since the air passing through the gap between the electrical box 70 and the air passage 74 flows toward the fan device 71 side, even if dust enters from the outside, the fan device 71 is prevented from entering the gap. Is discharged through.

In the above embodiment, the arrangement of the fan device 71 (the duct unit 72 and the exhaust heat fan unit 300) is not limited to the central portion of the upper surface of the electrical box 70. In short, the fan device 71 can be disposed on the side surface or the lower surface of the electrical box 70, for example, as long as hot air emitted from various electrical components (heat generating components) in the electrical box 70 can be exhausted.

"Putting mechanism 302"
In the present embodiment, the exhaust heat fan unit 300 described above is configured to be drawable from the duct unit 72 (that is, can be pulled out of the housing 2). Thereby, the freedom degree of arrangement | positioning of the fan apparatus 71 (duct unit 72, the exhaust heat fan unit 300) can be improved. This will be specifically described below.

As shown in FIG. 9 to FIG. 10, the chilling unit 1 of this embodiment has a loading / unloading mechanism 302. The taking in / out mechanism 302 is configured to be able to pull out or insert (push in) the exhaust heat fan unit 300 with respect to the duct unit 72.

Here, the exhaust heat fan unit 300 is pulled out from the duct unit 72. As a result, the exhaust heat fan unit 300 can be pulled out of the housing 2. On the other hand, the exhaust heat fan unit 300 is inserted (pushed in) into the duct unit 72. Thereby, the exhaust heat fan unit 300 can be accommodated in the duct unit 72 so that it can be taken in and out.

In order to realize such an operation, the loading / unloading mechanism 302 includes a slider 302a, a guide rail 302b (see FIG. 15), and an operation panel 302c. In addition, the configuration of the loading / unloading mechanism 302 is merely an example, and the loading / unloading mechanism 302 may be realized by another configuration.

The slider 302a is configured to be able to mount the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c). The sliders 302a are provided in parallel to each other on both sides of the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c). The slider 302a is arranged in parallel along the depth direction of the housing 2 (from the arrow F to the R direction).

The slider 302a is configured to reciprocate along the guide rail 302b. The guide rails 302b are provided in parallel to each other along both sides of the duct unit 72. The guide rail 302b is disposed to face the slider 302a. That is, the guide rail 302b is disposed in parallel along the depth direction of the housing 2 (the direction from the arrow F to the R).

The operation panel 302c is connected to the slider 302a. The operation panel 302c is attached to the slider (exhaust heat fan unit 300) from the front direction F of the housing 2. An operation knob 302d is provided on the operation panel 302c. The operation knob 302d is configured so that an operator can grasp it with fingers.

Further, the front direction F of the housing 2 is covered with a front plate 303 and an upper plate 304. The upper plate 304 is detachably attached to the upper side of the front plate 303. In a state where the upper plate 304 is attached to the housing 2, the operation panel 302 c is maintained in a state of being isolated from the outside by the upper plate 304.

Here, in a state where the exhaust heat fan unit 300 is accommodated in the duct unit 72, the worker grasps the operation knob 302d with fingers after removing the upper plate 304 from the casing 2. Pull out the operation knob 302d. The pulling force at this time is transmitted from the operation panel 302c to the slider 302a. The slider 302a moves along the guide rail 302b. Thereby, the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c) is pulled out from the duct unit 72 together with the slider 302a. Thus, the exhaust heat fan unit 300 can be pulled out of the housing 2.

In such a state, for example, various maintenance (for example, cleaning, repair, replacement) for the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c) can be easily performed. After the maintenance is completed, the exhaust heat fan unit 300 is accommodated in the duct unit 72 again.

That is, the worker grasps the operation knob 302d with fingers. The operation knob 302d is pushed in the depth direction. The pushing force at this time is transmitted from the operation panel 302c to the slider 302a. The slider 302a moves along the guide rail 302b. Thereby, the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c) is inserted into the duct unit 72 together with the slider 302a. Thus, the exhaust heat fan unit 300 can be accommodated in the duct unit 72. Thereafter, the upper plate 304 is attached to the housing 2.

As described above, according to the present embodiment, the exhaust heat fan unit 300 is configured to be drawable from the duct unit 72 (that is, can be pulled out of the housing 2). Thereby, the freedom degree of arrangement | positioning of the fan apparatus 71 (duct unit 72, the exhaust heat fan unit 300) can be improved. For example, the fan device 71 can be arranged in a place where it could not be installed because maintenance was difficult in the past.

As shown in FIGS. 11 to 13, the chilling unit 1 of the present embodiment includes the fan device 71 (the duct unit 72 and the exhaust heat fan unit 300), the partition bases 305 and 306, the cover 307, and the current plate. 308.

"Partition base 305,306"
The partition bases 305 and 306 are disposed between the air heat exchange unit 22 and the housing 2 (machine room 14). One partition base 305, 306 is provided at the lower end of each air heat exchange unit 22. The partition bases 305 and 306 are configured to cover the entire lower end of the air heat exchange unit 22. The partition bases 305 and 306 are configured over a wider range than the lower end of the exhaust passage 33 (see FIG. 6). The partition bases 305 and 306 are spread across the pair of flanges 61a and 61b. That is, the partition bases 305 and 306 are spread so that both sides thereof reach the flanges 61a and 61b.

The partition bases 305 and 306 are configured to have a downward slope from the central portion toward both sides. The partition bases 305 and 306 include two inclined surfaces M1 and M2. The two inclined surfaces M1 and M2 are disposed on both sides of the central portion of the partition base. The inclined surfaces M1 and M2 are configured along the surfaces of the partition bases 305 and 306. The base surface (that is, the inclined surfaces M1 and M2) has both ends (one end and the other end). One end of each of the inclined surfaces M1 and M2 is positioned at the central portion of the partition bases 305 and 306. The other ends of the inclined surfaces M1 and M2 are positioned on both sides of the partition bases 305 and 306 (that is, the flanges 61a and 61b).

In addition, the center part of the partition bases 305 and 306 refers to the part extended in parallel along the depth direction (arrow F to R direction) of the housing 2. A plurality of passages 309 (see FIG. 12) are provided at intervals on both sides of the partition bases 305 and 306 (the other ends of the inclined surfaces M1 and M2). The passage 309 is configured by penetrating the partition bases 305 and 306.

According to the partition bases 305 and 306, water (for example, rainwater) that falls or adheres to the base surfaces (inclined surfaces M1 and M2) flows down along the base surfaces (inclined surfaces M1 and M2). The water that has flowed down falls from the passage 309 on both sides of the partition bases 305 and 306 (the other ends of the inclined surfaces M1 and M2) to the eaves 61a and 61b. The dropped water flows through the troughs 61a and 61b and is then drained through the drain collecting board 62 described above. Note that, as rainwater, for example, rainwater blown into the exhaust passage 33 described above, rainwater that has flowed down through the air heat exchanger 22, or the like is assumed.

In this embodiment, among the above-described partition bases 305 and 306, the duct unit 72 is penetrated and supported by the partition base 306 between the electrical unit 6 (the electrical box 70) and the air heat exchange unit 22. Yes. The duct unit 72 is provided in the central portion of the partition base 306. The duct unit 72 is configured to protrude to both sides (upper side and lower side) of the partition base 306. The upper side of the partition base 306 refers to the side on which the air heat exchange unit 22 (exhaust passage 33) is disposed. The lower side of the partition base 306 refers to the side on which the housing 2 (the electrical unit 6 (the electrical box 70)) is disposed.

Here, the upper duct unit 72 of the partition base 306 is referred to as an upper duct 310, and the lower duct unit 72 of the partition base 306 is referred to as a lower duct 311. In this case, the above-described blowing part 301 can be defined as an opening (blow-out opening) of the duct unit 72 (that is, the upper duct 310 and the lower duct 311).

"Cover 307"
The cover 307 is disposed so as to cover the blowing portion 301, that is, the opening (blow-out port) of the duct unit 72 (the upper duct 310 and the lower duct 311). In other words, the upper part of the blowing part 301, that is, the upper part of the duct unit 72 (the upper duct 310 and the lower duct 311) is covered with the cover 307. In this case, the cover 307 is provided at a position separated from the blowing portion 301 (duct unit 72). The cover 307 and the blowing part 301 (duct unit 72) have a non-contact positional relationship with each other (see FIGS. 15 to 16).

Note that the mounting specification of the cover 307 may be set to be supported by the duct unit 72 (particularly, the upper duct 310) or may be set to be supported by the partition base 306, for example. Good.

The cover 307 has a contour having a downward slope from the central portion toward both sides. The cover 307 includes a front surface 307a (hereinafter referred to as a cover surface) and a back surface 307b (hereinafter referred to as a cover back surface). The cover surface 307a and the cover back surface 307b are configured to face each other in parallel. The cover surface 307 a and the cover back surface 307 b have a shape along the outline of the cover 307. That is, the cover surface 307a and the cover back surface 307b have a downward slope from the central portion toward both sides.

Here, the central portion of the cover 307 refers to a portion extending in parallel along the depth direction of the housing 2 (from the arrow F to the R direction). In the drawing, as an example, the central portion of the cover 307 and the central portion of the partition base 306 described above are positioned parallel to each other vertically when viewed in the direction of gravity. The both sides of the cover 307 indicate portions that are approaching from the central portion toward the base surface (the inclined surfaces M1 and M2) of the partition base 306.

According to such a cover 307, water (for example, rainwater) that falls or adheres to the cover surface 307a flows down along the cover surface 307a. The water that has flowed down falls from both sides of the cover surface 307a to the base surface (inclined surfaces M1, M2). The dropped water flows down along the base surface (inclined surfaces M1, M2). The water that has flowed down falls from the passages on both sides of the base surface (the other ends of the inclined surfaces M1 and M2) to the eaves 61a and 61b. The dropped water flows through the troughs 61a and 61b and is then drained through the drain collecting board 62 described above.

On the other hand, the hot air blown out from the blowing portion 301 of the duct unit 72 (upper duct 310, lower duct 311) by the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c) described above along the cover back surface 307b. To flow. That is, the hot air flows from the central portion of the cover back surface 307b toward both sides. The hot air that has flowed to both sides flows between the cover back surface 307 b and the duct unit 72 (specifically, the upper duct 310) and then flows out from both sides of the cover 307.

“Rectifying plate 308”
The rectifying plate 308 is disposed away from both sides of the cover 307 by a predetermined distance. One rectifying plate 308 is provided at a position facing both sides of the cover 307. In the drawing, as an example, the rectifying plates 308 are arranged one by one on the base surface (inclined surfaces M1 and M2) of the partition base 306. The rectifying plates 308 have a positional relationship facing each other in parallel. The rectifying plate 308 is raised from the base surface (inclined surfaces M1, M2) toward the exhaust passage 33 described above.

According to the current plate 308, a part of the hot air flowing out from both sides of the cover 307 flows along the base surface (the inclined surfaces M1 and M2). Here, when there is no rectifying plate 308 described above, the hot air reaches the air heat exchanging unit 22 directly. If it does so, there exists a possibility that the exchange efficiency of the air heat exchange part 22 may fall with the hot air which reached | attained.

However, in the present embodiment, the rectifying plate 308 described above is disposed. For this reason, the flow direction of the hot air flowing out from both sides of the cover 307 is restricted by the current plate 308. That is, the hot air is regulated in a direction that avoids the air heat exchange unit 22. In other words, the hot air does not reach the air heat exchange unit 22 directly. Thereby, the exchange efficiency of the air heat exchange part 22 can be maintained constant.

Furthermore, a flow path 312 is provided in the rectifying plate 308 toward the base surface (inclined surfaces M1, M2) of the partition base 306. The flow path 312 is configured to penetrate the rectifying plate 308. A plurality of flow paths 312 are arranged along the current plate 308. In this case, when the water (rain water) that has fallen from both sides of the cover surface 307 a to the base surface (inclined surfaces M 1 and M 2) reaches the current plate 308, it passes through the plurality of flow paths 312. Thus, the water flows down along the base surfaces (inclined surfaces M1 and M2) smoothly and without leakage without being blocked by the current plate 308.

As shown in FIG. 14 to FIG. 16, the chilling unit 1 of the present embodiment is assembled so that it can be divided (separated). That is, the chilling unit 1 has an upper section 1a and a lower section 1b. The upper section 1a can be connected (integrated) to the lower section 1b so as to be separable (split).

In the present embodiment, the above-described fan device 71 (see FIG. 13) can be separated (divided) into an upper fan device 71a and a lower fan device 71b, and is an upper fan relative to the lower fan device 71b. The device 71a is configured to be connectable. In this case, the upper section 1a includes, for example, an upper fan device 71a and an air heat exchange unit 22. The lower section 1b includes, for example, a lower fan device 71b and a housing 2 (machine room 14 (electrical unit 6)).

In the present embodiment, the duct unit 72 described above can be separated (divided) into an upper duct 310 and a lower duct 311, and the upper duct 310 can be connected to the lower duct 311. Yes. In such a connected state, the above-described partition base 306 is interposed between the upper duct 310 and the lower duct 311.

The upper duct 310 is disposed on the upper side of the partition base 306. The upper duct 310 is fixed to the base surface (inclined surfaces M1 and M2) of the partition base 306. The upper duct 310 is raised from the base surface (inclined surfaces M1, M2) toward the exhaust passage 33 described above. The cover 307 described above is supported by either the upper duct 310 or the partition base 306.

The lower duct 311 is disposed on the lower side (that is, the back side) of the partition base 306. The lower duct 311 is maintained in a state separated from the upper duct 310 and the partition base 306. The lower duct 311 is supported by the support plate 313. The support plate 313 is fixed to the housing 2. Thus, the lower duct 311 is fixed to the housing 2 via the support plate 313.

In the drawing, as an example, the upper duct 310 and the lower duct 311 each have a hollow rectangular shape. In this case, the upper duct 310 has a hollow upper opening 310a. The lower duct 311 has a hollow lower opening 311a. The partition base 306 has a hollow base opening 306a at the center thereof. The base opening 306a is configured to penetrate the partition base 306. The base opening 306a communicates with the upper opening 310a and the lower opening 311a so as to face each other. In the drawing, a rectangular base opening 306a is shown as an example.

Here, the above-described blowing portion 301 (opening of the duct unit 72 (outlet)) is constituted by an upper opening 310a, a base opening 306a, and a lower opening 311a. In other words, the upper opening 310a, the base opening 306a, and the lower opening 311a are mutually connected (connected) in this order, so that a series of blowing portions 301 is configured.

"Upper fan device 71a, lower fan device 71b"
In the upper fan device 71a, for example, an upper duct 310, a partition base 306, and a cover 307 are set as main components. As described above, the upper duct 310 and the cover 307 are supported by the partition base 306. The partition base 306 is fixed to the lower end of the air heat exchange unit 22 (upper section 1a).

The lower fan device 71b has, for example, a lower duct 311 and an exhaust heat fan unit 300 (electric fans 73a, 73b, 73c) as main components. The exhaust heat fan unit 300 (electric fans 73 a, 73 b, 73 c) is accommodated in the lower duct 311. In the specification to which the loading / unloading mechanism 302 is applied, the exhaust heat fan unit 300 (electrical fans 73a, 73b, 73c) is accommodated in the lower duct 311 by the loading / unloading mechanism 302 so as to be able to be loaded / unloaded.

Here, the upper section 1a is connected to the lower section 1b. The air heat exchange part 22 is arrange | positioned at the upper part of the housing | casing 2 (machine room 14 (electric equipment unit 6)). The upper fan device 71a and the lower fan device 71b are combined with each other. At this time, the upper duct 310 and the lower duct 311 are connected to each other. Specifically, the upper duct 310 is fixed to the base surface (inclined surfaces M1 and M2) of the partition base 306. Therefore, the lower duct 311 is connected to the lower part (that is, the back surface) of the partition base 306.

In this state, the upper opening 310a of the upper duct 310, the base opening 306a of the partition base 306, and the lower opening 311a of the lower duct 311 are connected to each other in this order. That is, the upper opening 310a, the base opening 306a, and the lower opening 311a are continuous with each other in this order. Thus, the chilling unit 1 in which a series of blowing parts 301 is configured is assembled.

According to this configuration, the fan device 71 (duct unit 72) is separated (divided) into the upper fan device 71a (upper duct 310) and the lower fan device 71b (lower duct 311). Thereby, when the chilling unit 1 is assembled, the upper section 1a and the lower section 1b can be assembled separately. That is, the assembly process of the upper section 1a and the assembly process of the lower section 1b can be performed independently of each other. In this case, when assembling the fan device 71, it is sufficient to apply the lower fan device 71b to the lower side of the upper fan device 71a. That is, it is sufficient to connect the lower duct 311 to the lower side of the upper duct 310. As a result, the upper section 1a and the lower section 1b can be connected (integrated) safely and accurately in a short time.

"Buffer material 314"
As shown in FIGS. 15 to 16, the chilling unit 1 of the present embodiment has a cushioning material 314. The cushioning material 314 is disposed between the upper section 1a and the lower section 1b.

According to this configuration, when the upper section 1a and the lower section 1b are connected, the cushioning material 314 is elastically deformed. At this time, the shock at the time of connection is absorbed and removed by the buffer material 314. Thus, it is possible to prevent the occurrence of a situation in which the components (for example, the upper duct 310 and the lower duct 311) of the upper section 1a and the lower section 1b are deformed or damaged (broken) due to an impact at the time of connection.

Furthermore, when the cushioning material 314 is elastically deformed, manufacturing intersections or design intersections are absorbed and removed. For this reason, it is not necessary to increase the connection accuracy between the upper section 1a and the lower section 1b. In other words, a high level of skill is not required when connecting (assembling) the upper section 1a and the lower section 1b. Thus, the assemblability of the upper section 1a and the lower section 1b can be greatly improved.

In addition, by providing the buffer material 314, the sealing performance between the upper section 1a and the lower section 1b can be improved. For example, the buffer material 314 is disposed between the upper duct 310 and the lower duct 311. Thereby, the buffer material 314 is elastically deformed in a state where the upper duct 310 and the lower duct 311 are connected. As a result, the buffer material 314 is closely attached between the upper duct 310 and the lower duct 311 without a gap.

In the drawing, a buffer material 314 is provided along the upper end of the rectangular lower duct 311. In this case, when the lower duct 311 is connected to the lower portion (that is, the back surface) of the partition base 306, the cushioning material 314 has no gap between the upper end of the lower duct 311 and the lower portion (back surface) of the partition base 306. In close contact. Thereby, a series of blowing parts 301 excellent in sealing performance can be realized. Thus, the sealing performance of the blowing part 301 is kept constant.

"Water receiving mechanism"
As shown in FIGS. 15 to 16, the chilling unit 1 of the present embodiment has a water receiving mechanism. The water receiving mechanism is provided inside the blowing part 301 (duct unit 72) described above. The water receiving mechanism prevents, for example, water (for example, rainwater) existing in the upper section 1a (air heat exchange unit 22) from entering the lower section 1b (machine room 14 (electrical unit 6)). It is configured to be possible.

The water receiving mechanism includes a water receiving portion 315. The water receiving portion 315 is configured to protrude toward the inside of the blowing portion 301 (duct unit 72). The water receiving part 315 is continuously configured along the inside of the blowing part 301 (duct unit 72). The water receiver 315 is configured to continuously cover the inner part of the opening of the blowing part 301 (duct unit 72). The water receiver 315 protrudes with an angle in the horizontal direction, or an angle of ascending from the base portion of the inner periphery of the opening toward the protruding direction.

In the drawing, as an example, a part of the partition base 306 is used as the water receiving portion 315. That is, the upper opening 310 a of the upper duct 310 is set larger (wider) than the base opening 306 a of the partition base 306.

Thus, a water receiving portion 315 is realized inside the lower end of the upper duct 310 and partially covering the inner side of the lower end of the upper opening 310a. In this case, the water receiver 315 has a structure that protrudes (protrudes) to the inner side of the upper opening 310 a of the upper duct 310. Furthermore, as described above, the partition base 306 is configured to have a downward slope from the central portion toward both sides. For this reason, the water receiving portion 315 using a part of the water receiving portion 315 is configured to have an upward inclination angle toward the inside of the upper opening 310a.

Furthermore, a water storage structure is realized by a combination of the water receiving portion 315 and the upper duct 310. The water storage structure is configured such that a certain amount of water can be temporarily stored by the cooperation of the water receiving portion 315 and the upper duct 310. Thereby, the water receiving mechanism has a function as a water storage structure.

According to such a water storage mechanism, even when water (for example, rainwater) existing in the upper section 1a (air heat exchange unit 22) enters the blowing unit 301 (duct unit 72), the blowing unit 301 (duct) The water (rain water) falling along the inside of the unit 72) is received by the water receiver 315 described above. The received water (rain water) is stored between the water receiver 315 and the upper duct 310. Thus, the water can be prevented from entering the lower section 1b (machine room 14 (electrical unit 6)).

"Draining mechanism"
As shown in FIGS. 15 to 16, the chilling unit 1 of the present embodiment has a water draining mechanism. The drainage mechanism is configured to be able to extract water (for example, rainwater) stored by the above-described water receiving mechanism (specifically, the above-described water storage structure). The water drain mechanism includes a water drain passage 316. The drainage passage 316 is provided in the duct unit 72 (specifically, the above-described upper duct 310).

The drainage passage 316 is provided along the lower end of the upper duct 310 with an interval. The drainage passage 316 is configured to penetrate the lower end of the upper duct 310. The drainage passage 316 is penetrated toward the base surface (the inclined surfaces M1 and M2) of the partition base 306.

In this case, the water (rain water) stored by the water storage structure passes through the drain passage 316 and is extracted to the base surface (inclined surfaces M1, M2). The extracted water flows down along the base surface (inclined surfaces M1, M2). The water that has flowed down falls from the passages on both sides of the partition base 306 (the other ends of the inclined surfaces M1 and M2) to the eaves 61a and 61b. The dropped water flows through the troughs 61a and 61b and is then drained through the drain collecting board 62 described above.

According to this drainage mechanism, the water (rain water) stored by the water receiving mechanism (water storage structure) is drained from the drainage passage 316. Thereby, the stored water (rain water) can be prevented from overflowing from the water storage structure and falling into the blowout portion 301 (upper opening 310a, base opening 306a, lower opening 311a). Thus, the water can be prevented from entering the lower section 1b (machine room 14 (electrical unit 6)).

Incidentally, the pressure state is reversed above and below the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c). For example, in the exhaust heat operation state, the lower side of the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c), that is, the interior of the electrical unit 6 (electrical box 70) is negative pressure. On the other hand, the upper side of the exhaust heat fan unit 300 (electric fans 73a, 73b, 73c), that is, the pressure state of the blowing part 301 is positive.

This ensures that the stored water (rain water) is always subjected to a positive pressure action during exhaust heat. As a result, the water continues to be pressed in the direction of the drain passage 316. Thus, the water is drained from the drain passage 316 without leakage. Therefore, the water does not enter the lower section 1b (machine room 14 (electrical unit 6)).

Although the embodiments of the present invention have been described as described above, these embodiments are presented as examples, and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

1a ... Upper section, 1b ... Lower section, 2 ... Housing, 14 ... Machine room,
25 ... water heat exchanger, 25a, 25b ... refrigerant flow path (first refrigerant flow path, second refrigerant flow path),
25c ... water flow path, 28a ... water inlet, 45, 80, 90 ... spiral pump,
49 ... casing, 50 ... power section (motor), 51 ... suction port, 52 ... discharge port,
53 ... Impeller, O1 ... Rotation axis, 70 ... Electrical box, 71 ... Fan device,
72 ... Duct unit, 300 ... Waste heat fan unit, 305, 306 ... Partition base,
310 ... upper duct, 311 ... lower duct, 310a ... upper opening, 311a ... lower opening,
306a ... Base opening, 314 ... Buffer material, 315 ... Water receiving part (water receiving mechanism),
316: A drainage passage (drainage mechanism).

Claims (5)

A lower section containing an electrical box that controls refrigeration cycle operation;
An upper section connected to the lower section and including an air heat exchanger;
A partition base disposed between the electrical box and the air heat exchange unit, fixed to a lower end of the upper section, and having a hollow base opening;
An exhaust heat fan unit capable of generating an air flow inside the electrical box;
A duct unit configured with a hollow blow-out portion capable of exhausting hot air inside the electrical box by the air flow; and
The duct unit is
An upper duct disposed on the upper side of the partition base and having a hollow upper opening;
A lower duct that is disposed on the lower side of the partition base and that houses the exhaust heat fan unit and has a hollow lower opening;
The refrigeration cycle apparatus, wherein the upper opening, the base opening, and the lower opening are communicated with each other in a state where the upper section and the lower section are connected via the partition base. Comprising a cushioning material disposed between the upper duct and the lower duct;
When the upper section and the lower section are connected, the cushioning material is elastically deformed and closely contacts the upper duct and the lower duct without any gap, so that the sealing performance of the blowing portion is maintained constant. The refrigeration cycle apparatus according to claim 1. A water receiving mechanism capable of preventing water from entering the inside of the lower section;
The refrigeration cycle apparatus according to claim 2, wherein the water receiving mechanism includes a water receiving portion configured to protrude toward the inside of the blowing portion. The refrigeration cycle apparatus according to claim 3, wherein the base opening of the partition base is set smaller than the upper opening of the upper duct. The water receiving mechanism functions as a water storage structure capable of temporarily storing a certain amount of water by the cooperation of the water receiving shelf and the upper duct, and allows the lower end of the upper duct to pass through. With a drainage passage constructed
At the time of exhaust heat, the pressure state of the blowing portion becomes a positive pressure, and the water stored by the water storage structure is always subjected to the pressure action by the positive pressure, whereby the water is directed in the direction of the drain passage. The refrigeration cycle apparatus according to claim 3, wherein the refrigeration cycle apparatus is pressed and drained.

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