JP6657399B2 - Refrigeration cycle device - Google Patents

Description

  An embodiment of the present invention relates to a refrigeration cycle device in which a connection end of a water pipe projects outside a machine room. Further, the embodiment of the present invention relates to a refrigeration cycle device excellent in heat exhaustability (maintenance) and assemblability.

  For example, an air-cooled heat pump chilling unit that generates cold or hot water has a first section having a machine room accommodating various refrigeration cycle components, and a second section in which a plurality of air heat exchange units are arranged in a line. And

  The second section is disposed on top of the first section. Each of the first section and the second section has an elongated shape extending in the depth direction of the chilling unit, and has the same overall length along the longitudinal direction.

  For this reason, both ends along the longitudinal direction of the first section and the second section are continuously erected along the height direction of the chilling unit, and one end along the longitudinal direction of the first section is provided. A connection end of the water pipe protrudes from the end.

Patent No. 5555701 6-35835

  With a conventional air-cooled heat pump chilling unit, at the site where the chilling unit is delivered, it is possible to connect the connection end of the water piping and the site piping laid at the site using various valves and flexible joints. General.

  However, since the connection end of the water pipe protrudes out of the chilling unit from one end of the first section, it cannot be denied that various valves and flexible joints protrude greatly around the chilling unit.

  As a result, a distance of at least about several hundred mm is required between the on-site piping and the chilling unit, which is one factor that increases the space for installing the chilling unit.

  Furthermore, in recent years, even when the fan for the air heat exchange unit is stopped, it is possible to secure exhaust heat in the electrical unit, maintenance of the exhaust heat configuration is easy, and assembly of the air heat exchange unit to the housing. Is required.

  An object of the present invention is to provide a refrigeration cycle device that can reduce the space required for installation and can be easily installed even in a small space.

  A further object of the present invention is to provide a refrigeration cycle apparatus having excellent heat exhaustability (maintenance) and excellent assemblability.

According to one embodiment, in a refrigeration cycle apparatus including a heat exchange chamber in an upper portion and a machine room in a lower portion for housing a compressor of a refrigeration cycle, the refrigeration cycle is disposed in the machine room and includes the compressor. An electric box for controlling the operation, a heat exhaust fan unit capable of generating a flow of air inside the electric box, and containing the heat exhaust fan unit, and the air inside the electric box is A duct unit that discharges the heat to the heat exchange chamber, wherein the blowout portion of the duct unit is configured to face directly above the heat exhaust fan unit, and an upper end of the duct unit is connected to the heat exchange chamber. The part is positioned with the part inserted.

FIG. 1 is a perspective view of an air-cooled heat pump chilling unit according to the first embodiment. FIG. 2 is a perspective view of the air-cooled heat pump chilling unit according to the first embodiment when the machine room is opened, as viewed from the left side. FIG. 3 is a perspective view of the air-cooled heat pump chilling unit according to the first embodiment when the machine room is opened, as viewed from the right side. FIG. 4 is a side view of the air-cooled heat pump chilling unit according to the first embodiment. FIG. 5 is a circuit diagram showing a refrigeration cycle of the air-cooled heat pump chilling unit according to the first embodiment. FIG. 6 is a plan view showing a positional relationship among a first refrigeration cycle unit, a second refrigeration cycle unit, a water circuit, and an electrical unit housed in a machine room. FIG. 7 is an exploded perspective view showing an air heat exchange unit used in the air-cooled heat pump chilling unit according to the first embodiment. FIG. 8 is a perspective view showing a positional relationship between a machine room and a drain pan in the air-cooled heat pump chilling unit according to the first embodiment. FIG. 9 is a cross-sectional view illustrating a positional relationship among an electrical unit, a drain pan, and an air heat exchange unit in the air-cooled heat pump chilling unit according to the first embodiment. FIG. 10 is a side view of an air-cooled heat pump chilling unit according to the second embodiment. FIG. 11 is a side view of an air-cooled heat pump chilling unit according to the third embodiment. FIG. 14 is a perspective view of an air-cooled heat pump chilling unit according to a fourth embodiment. FIG. 3 is a perspective view showing an arrangement configuration of a duct unit and a heat exhaust fan unit. FIG. 17 is a perspective view showing an arrangement configuration of a partition base and a duct unit in the fifth embodiment. The perspective view which expands and shows the inside of the frame of F15 of FIG. FIG. 15 is a front view showing an arrangement configuration of the partition base and the duct unit in FIG. 14. The front view showing that an air heat exchange part and a case can be separated in a 6th embodiment. FIG. 18 is a perspective view of the duct unit of FIG. 17 viewed from the front side of the partition base. FIG. 18 is a perspective view of the duct unit of FIG. 17 viewed from the back side of the partition base.

"First Embodiment"
Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 9.

  1 to 3 are perspective views of an air-cooled heat pump chilling unit that generates, for example, cold water or hot water, FIG. 4 is a side view of the air-cooled heat pump chilling unit, and FIG. 5 shows a refrigeration cycle of the air-cooled heat pump chilling unit. It is a circuit diagram.

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

  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. .

  The housing 2 is an example of a first section, and is installed on a horizontal installation surface G such as a rooftop of a building. The housing 2 is formed in an elongated hollow box shape whose depth dimension is much larger than its 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 rails 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 rails 10 are elements that connect the lower frame 8 and the upper frame 9, and are arranged at an interval 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 move from the lower frame 8 to the upper frame 9.

  Therefore, as shown in FIGS. 2 and 3, when the housing 2 is viewed from the front direction F and the rear 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 right and left sides of the main frame 7 are covered with a plurality of side plates 12, respectively. The front and back of the main frame 7 are respectively covered with end plates (not shown). Further, a bottom plate 13 is fixed on the lower frame 8. Here, the bottom plate 13 is a plurality of sheet metal members on which each of the first refrigeration cycle unit 3, the second refrigeration cycle unit 4, the electrical unit 6, and a pump unit having a centrifugal pump 45 described later is mounted. Are fixed to the main frame 7. The bottom plate 13 defines a machine room 14 inside the housing 2 in cooperation with the side plate 12 and the end plate. The machine room 14 extends over the entire length of the housing 2 along the depth direction.

  According to the present embodiment, the front end of the lower frame 8 and the front end of the upper frame 9 located on the front side of the housing 2 are positioned along the depth direction of the housing 2 so as to be arranged 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 extends horizontally behind the lower frame 8 behind the housing 2. For this reason, the total length along the depth direction of the housing 2 is defined by the length L1 of the lower frame 8. The depth direction of the housing 2 can be rephrased as the longitudinal direction of the housing 2.

  As shown in FIGS. 5 and 6, 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 from each other.

  Since the first to fourth refrigerant circuits RA, RB, RC, and RD have a common configuration, the first to fourth refrigerant circuits RA, RB, RC, and RD will be described as representatives of the first to fourth refrigerant circuits RB, RC, and RD. RD is denoted by the same reference numeral, and description thereof is omitted.

  The first refrigerant circuit RA mainly includes a variable capacity compressor 20, a four-way valve 21, an air heat exchanger 22, a pair of expansion valves 23a and 23b, a receiver 24, a water heat exchanger 25, and a gas-liquid separator 26. As an element. The plurality of elements are one example of a refrigeration cycle component, and are connected via a circulation circuit 27 through which a refrigerant circulates.

  Specifically, as shown in FIG. 5, the discharge port of the compressor 20 is connected to the first port 21a of the four-way valve 21. The second port 21b of the four-way valve 21 is connected to the air heat exchange unit 22. The air heat exchange section 22 of the present embodiment includes a pair of air heat exchangers 29a and 29b and a fan 30.

  As shown in FIG. 7, the air heat exchangers 29a and 29b are configured by combining a plurality of plate fins and a plurality of refrigerant pipes, and have a shape in which a horizontal cross section is bent into a substantially C shape. . The air heat exchangers 29a and 29b stand so as to face each other with an interval in the width direction of the housing 2, and are inclined in a direction away from each other as they go upward. The gap between the edges of the air heat exchangers 29a and 29b is closed by a pair of shielding plates 32a and 32b. The 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.

  Therefore, as shown in FIGS. 2 and 3, the air heat exchanging unit 22 is configured such that when the casing 2 is viewed from the front direction F and the rear direction R, the casing 2 It is formed in a V-shape that expands in the width direction. Therefore, the chilling unit 1 in which the air heat exchanging unit 22 is located on the housing 2 has a drum-shaped shape in which an intermediate portion along the height direction is constricted.

  The fan 30 includes a fan motor 35 for rotating an impeller 34. The fan motor 35 has a built-in inverter board (not shown) for variably controlling the rotation speed of the impeller 34. The fan motor 35 is supported via a fan base 36 between the upper ends of the air heat exchangers 29a and 29b so as to be located at the upper end of the exhaust passage 33.

  Further, the impeller 34 of the fan 30 is covered with a fan cover 37. The fan cover 37 has a cylindrical exhaust port 38 facing the impeller 34.

  When the fan 30 is driven, 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 is exhausted from the exhaust port 38 to above the chilling unit 1.

  As shown in FIG. 5, the inlets of the air heat exchangers 29a and 29b are connected in parallel to the second port 21b 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 21d of the four-way valve 21 is connected to the suction side of the compressor 20 via a gas-liquid separator 26.

  Further, the outlet of the gas-liquid separator 26 is connected to a first port 21 a of the four-way valve 21 via a 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 passage 25a, a second refrigerant passage 25b, and a water passage 25c. The first refrigerant passage 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 passage 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, also 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. Have been. Therefore, the chilling unit 1 has two water heat exchangers 25 mounted thereon.

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

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

  By adopting this configuration, the air heat exchanging portions 22 located on the front end and the rear end of the housing 2 are configured such that, in addition to the air sucked from the width direction of the chilling unit 1, The heat exchange can be performed by utilizing the air sucked from the front direction F and the rear direction R.

  As best shown in FIG. 4, the upper frame 9 of the main frame 7 extends horizontally behind the housing 2 more than the lower frame 8. Of the four sets of air heat exchanging units 22, the rearmost air heat exchanging unit 22 located behind the housing 2 projects from the rear end of the housing 2 in the depth direction of the housing 2. In other words, the total length along the depth direction of the housing 2 is shorter than the total length along the direction in which the four sets of air heat exchange units 22 are arranged.

  As a result, behind the casing 2 as the first section, there is formed a step portion 43 which is recessed from the rearmost air heat exchange portion 22. The step portion 43 defines a continuously open space S1 on the side and behind the housing 2, and the last air heat exchange portion 22 projects over the space S1.

  That is, the space S1 is located below the bent ends of the air heat exchangers 29a and 29b located at the rearmost side of the air heat exchanger 22. Here, as shown in FIG. 4, the vertical rail 10 arranged at the rear end of the housing 2 is located at the center along the depth direction of the air heat exchangers 29 a and 29 b constituting the rearmost air heat exchanger 22. Alternatively, it is located on the back side of the housing 2 with respect to the center. Thus, the heavy air heat exchangers 29a and 29b can be stably supported by the main frame 7.

  As shown in FIG. 2 to FIG. 4 and FIG. 6, various elements of the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4 except for the four sets of the air heat exchanging units 22 are the housing 2. In the machine room 14.

  The first refrigeration cycle unit 3 including the first refrigerant circuit RA and the second refrigerant circuit RB is, for example, the right half of the right half along the longitudinal direction of the machine room 14 when the housing 2 is viewed from the front F direction. Located in the area. Similarly, the second refrigeration cycle unit 4 including the third refrigerant circuit RC and the fourth refrigerant circuit RD extends along the longitudinal direction of the machine room 14 when the housing 2 is viewed from the front F, for example. It is located in the left half area.

  Specifically, the two 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 located on the right of the machine room 14. In a half area, the casing 2 is installed on the bottom plate 13 so as to be arranged in a line along the depth direction of the housing 2. Further, 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 at the end of the first refrigeration cycle unit 3. I have.

  The two compressors 20, the two receivers 24, and the two gas-liquid separators 26 that constitute the third refrigerant circuit RC and the fourth refrigerant circuit RD are arranged in a casing in the left half region of the machine room 14. It is installed on the bottom plate 13 so as to line up in a row along the depth direction of the body 2. Further, 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 at the rearmost part of the second refrigeration cycle unit 4. I have.

  Therefore, as best shown in FIG. 6, the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4 extend in the machine room 14 in the longitudinal direction of the housing 2, and They are arranged in the width direction. At the same time, the two water heat exchangers 25 are arranged in the width direction of the housing 2 at a position closer to the step 43 than to an intermediate portion along the longitudinal direction of the housing 2.

  As shown in FIGS. 2 to 6, 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 type water circulation pump 45 and first to fourth water pipes 46a, 46b, 46c, 46d as main elements.

  The water circulation pump 45 is installed on the bottom plate 13 so as to be located at the rear end of the machine room 14. Therefore, the water circulation pump 45 is located between the two water heat exchangers 25 arranged in the width direction of the housing 2 and the step 43 behind the housing 2.

  The first water pipe 46a is connected to a suction port of a water circulation pump 45. The second water pipe 46b connects between the discharge port of the water circulation pump 45 and the water flow path 25c of the water heat exchanger 25 corresponding to the first refrigeration cycle unit 3. The third water pipe 46c connects the water flow path 25c of the water heat exchanger 25 of the first refrigeration cycle unit 3 and the water flow path 25c of the water heat exchanger 25 of the second refrigeration cycle unit 4 in series. are doing. The fourth water pipe 46d is connected to the water channel 25c of the water heat exchanger 25 of the second refrigeration cycle unit 4.

  According to the present embodiment, the water circulation pump 45 and the two water heat exchangers 25 of the water circuit 5 are adjacent to each other at the rear of the machine room 14. Therefore, the first to fourth water pipes 46a, 46b, 46c, 46d of the water circuit 5 are concentrated at the rear end of the machine room 14, and the first to fourth water pipes 46a, 46b, 46c, 46d are connected. The length becomes shorter.

  Thereby, workability when installing the first to fourth water pipes 46a, 46b, 46c, 46d in the machine room 14 is improved, and the first to fourth water pipes 46a, 46b, 46c, 46d are improved. Maintenance can be easily performed.

  As shown in FIGS. 4 and 6, the first water pipe 46a has a first connection end 48. The first connection end 48 includes, for example, a water pipe inlet 49 formed at an upstream end of the first water pipe 46a, and a strainer 50 connected to the water pipe inlet 49. The first connection end 48 protrudes from the rear end of the machine room 14 toward the step 43 behind the housing 2.

  The fourth water pipe 46d has a second connection end 51. The second connection end 51 includes, for example, a water pipe outlet 52 formed at a downstream end of the fourth water pipe 46d, and a check valve 53 connected to the water pipe outlet 52. The second connection end 51 protrudes from the rear end of the machine room 14 toward the step 43 behind the housing 2.

  Therefore, the first connection end 48 and the second connection end 51 of the water circuit 5 are accommodated in the space S1 defined by the step 43. Therefore, although the first connection end 48 and the second connection end 51 project behind the machine room 14, most of the first connection end 48 and the second connection end 51 are provided. Is located immediately below the rearmost air heat exchange unit 22.

  Further, as shown in FIG. 4, the first connection end 48 of the first water pipe 46a is placed on the installation surface G via accessories (not shown) such as various valves and flexible joints. Is connected to the first on-site pipe 55 laid in the first place. The first on-site pipe 55 is connected to a water outlet on the side of a utilization device such as an air conditioner.

  The second connection end 51 of the fourth water pipe 46d is connected to a second on-site pipe laid on the installation surface G via accessories (not shown) such as various valves and flexible joints. 56. The second on-site pipe 56 is connected to a water inlet on the side of a utilization device such as an air conditioner.

  As shown in FIGS. 8 and 9, a drain pan 60 that receives dew condensation water and the like dropped from the air heat exchangers 29 a and 29 b is disposed between the machine room 14 of the housing 2 and the four sets of air heat exchange units 22. ing. The drain pan 60 of the present embodiment includes a pair of gutters 61a and 61b and a drain recovery board 62.

  The gutters 61a and 61b are elements that extend straight along the arrangement direction of the four sets of air heat exchangers 22 and are located immediately below the air heat exchangers 29a and 29b of each air heat exchanger 22. The housing 2 is supported by the upper frame 9.

  The gutters 61a and 61b are arranged in parallel in the width direction of the housing 2 with an interval therebetween. The bottoms of the gutters 61a and 61b are inclined downward as they progress from the front to the back of the housing 2. Further, a ventilation passage 63 is formed between the gutters 61a and 61b. The ventilation passage 63 extends along the depth direction of the housing 2, and the machine room 14 and the exhaust passages 33 of the four sets of air heat exchangers 22 are communicated through the ventilation passage 63.

  The drain recovery board 62 is supported by the upper frame 9 so as to straddle between the rear ends of the gutters 61a and 61b. The rear end of the drain recovery board 62 projects above the step 43 behind the housing 2. Further, the drain collection board 62 has a drain pipe connection port 64 opened to the step 43.

  As shown in FIGS. 4, 6 and 8, the electrical unit 6 is located at the front end of the machine room 14 on the front side of the housing 2. The electrical component unit 6 of the present embodiment includes an electrical component box 70 and a fan device 71. The electrical box 70 has a main box 72, a first side box 73a, and a second side box 73b.

  As shown in FIGS. 8 and 9, the main box 72 is a substantially rectangular parallelepiped element and has the same height as the machine room 14. The left and right side surfaces of the main box 72 are separated from the side plate 12 of the housing 2 as approaching the bottom plate 13. The first side box 73a and the second side box 73b are box-shaped elements having a smaller height dimension than the main box 72, and have an elongated shape extending in the depth direction of the housing 2.

  The first side box 73a projects from the lower part of the left side of the main box 72 toward the left side of the main box 72. The second side box 73b projects from the lower part of the right side of the main box 72 toward the right side of the main box 72. The first side box 73a and the second side box 73b are fixed on the bottom plate 13 of the machine room 14, respectively.

  According to the present embodiment, since the housing 2 is formed in a tapered shape from the lower frame 8 to the upper frame 9, as shown in FIG. 9, the length of the machine chamber 14 along the width direction of the housing 2 is increased. The height is expanded from the upper part of the machine room 14 to the lower part. Therefore, the first side box 73a and the second side box 73b are accommodated in the lower part of the machine room 14 whose width has been expanded.

  By employing this configuration, the front end of the machine room 14 can be effectively used as a space for accommodating the electrical equipment box 70 to all corners. Therefore, the internal volume of the electrical box 70 can be sufficiently secured while the length of the electrical box 70 along the depth direction of the housing 2 is suppressed.

  According to the present embodiment, an air passage 74 as shown in FIG. 9 is formed inside the main box 72. The air passage 74 is formed between a pair of partition plates 75a, 75b that partition the inside of the main box 72. The air passage 74 extends in the depth direction of the housing 2 at a central portion along the width direction of the main box 72, and stands up along the height direction of the main box 72.

  The lower end of the air passage 74 is opened at the bottom of the main box 72 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 main box 72.

  The electrical box 70 houses various electric components that control the operation of the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4. One example of the electric component is a plurality of control boards for controlling the voltage and frequency applied to the 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 reactors. Examples include a filter substrate, a plurality of terminal blocks, and a plurality of electromagnetic contactors.

  Among various electric components, for example, a plurality of control boards and a plurality of power modules can be rephrased as the heat generating component 78 that generates a large amount of heat during operation. Since the heat generating component 78 requires active heat dissipation, it is thermally connected to the plurality of heat sinks 79. The heat sink 79 is exposed to the air passage 74 through the partition plates 75a and 75b.

As shown in FIGS. 6, 8, and 9, the fan device 71 of the electrical unit 6 is mounted on the upper surface of the main box 72.
In this state, the fan device 71 is configured to be able to exhaust hot air generated from various electric components (that is, heat-generating components) in the electrical component box 70. For this purpose, the fan device 71 includes an elongated box-shaped duct unit 81 and a heat-dissipating fan unit 300 (see FIGS. 12 and 13) housed in the duct unit 81.

  In the drawing, as an example, the exhaust heat fan unit 300 includes a plurality (for example, three) of electric fans 82a, 82b, 82c, a slider 302a surrounding the electric fans 82a, 82b, 82c, an operation panel 302c, It has. The plurality of electric fans 82a, 82b, 82c are arranged in a line along the depth direction of the housing 2 (the direction from arrow F to R).

  Here, by driving the electric fans 82a, 82b and 82c, a flow of air is generated inside the electrical component box 70. As a result, due to the flow of air, the hot air inside the electrical equipment box 70 passes through the duct unit 81 (see FIG. 13) and is discharged outside the machine, so that the inside of the electrical equipment box 70 is cooled.

  The duct unit 81 is provided at a central portion of the upper surface of the main box 72. The duct unit 81 is provided to face the opening of the air passage 74 described above. The duct unit 81 is configured to surround the opening of the air passage 74. The heat-dissipating fan unit 300 is accommodated and arranged in an intermediate portion of the duct unit 81.

  The lower end of the duct unit 81 is positioned so as to partially enter the inside of the main box 72. The upper end of the duct unit 81 is positioned such that it passes between the gutters 61a and 61b and partially enters the exhaust passage 33 (see FIG. 9) of the air heat exchanger 22 described above. In other words, the duct unit 81 is configured by communicating the inside and the outside of the main box 72 with each other.

  The duct unit 81 is provided with a blowing portion 301. The blow-out section 301 is configured to face directly above the exhaust heat fan unit 300. That is, the blow-out portion 301 is formed from the exhaust heat fan unit 300 to the upper end of the duct unit 81. In such a configuration, the blow-off section 301 can discharge hot air in the electrical equipment box 70) to the outside as a blow-out port of the duct unit 81.

  The electric fans 82a, 82b, 82c are arranged in a line at intervals in the depth direction of the housing 2. The electric fans 82 a, 82 b, and 82 c are incorporated in the duct unit 81 in a horizontal position with the rotation axis set vertically so as to be located directly above the air passage 74. Each of the electric fans 82a, 82b, 82c exhausts air above the duct unit 81.

  When the electric fans 82a, 82b, 82c operate, a negative pressure acts on the air passage 74 of the main box 72. Thereby, as shown by an arrow in FIG. 9, the air around the housing 2 is sucked into the air passage 74 from the gap g through the intake hole 76. The sucked air flows upward from the bottom in the air passage 74 and is guided to the duct unit 81.

  The air flowing through the air passage 74 comes into contact with a heat sink 79 that receives heat from the heat generating component 78. As a result, the heat of the heat generating component 78 transmitted to the heat sink 79 is released by multiplying the flow of air, and the heat generating component 78 is forcibly cooled.

  The air (hot air) that has passed through the air passage 74 is sucked up by the electric fans 82a, 82b, and 82c, and, as indicated by the white arrows in FIG. The gas is discharged directly to the exhaust passage 33 between 29a and 29b.

  The air discharged into the exhaust passage 33 is sucked up toward the exhaust port 38 together with the air passing through the air heat exchangers 29a and 29b by the operation of the fan 30, and is discharged from the exhaust port 38 to above the chilling unit 1. . Therefore, the air (hot air) after cooling the heat generating component 78 of the electrical component unit 6 does not stay in the machine room 14.

  More specifically, air outside the chilling unit 1, that is, outside air, is guided from the intake hole 76 to the air passage 74 in the electrical component box 70 where the heat sink 79 is exposed. Since the outside air contains dust and moisture, if the outside air that has passed through the air passage 74 is discharged to the machine room 14, it cannot be denied that the dust is accumulated in the machine room 14 at an early stage.

  On the other hand, in the present embodiment, the duct unit 81 accommodating the electric fans 82a, 82b, 82c protrudes into the exhaust passage 33 between the air heat exchangers 29a, 29b through the space between the gutters 61a, 61b of the drain pan 60. I have. Therefore, the outside air that has passed through the air passage 74 is discharged out of the chilling unit 1 from the exhaust port 38 of the air heat exchange unit 22 without passing through the machine room 14.

  Therefore, it is possible to prevent dust contained in the air from accumulating in the machine room 14 and adhering to the first refrigeration cycle unit 3 and the second refrigeration cycle unit 4.

  Further, according to the present embodiment, the machine room 14 in the housing 2 is provided inside the four sets of air heat exchange units 22 through the ventilation passage 63 between the pair of gutters 61 a and 61 b extending in the depth direction of the housing 2. Exhaust passage 33. For this reason, the air in the machine room 14 can be forcibly sucked up from the air passage 63 toward the exhaust passage 33 by using the fan 30 of the air heat exchange unit 22. Therefore, the air permeability of the machine room 14 is remarkably improved, and the heat is hardly trapped in the machine room 14.

  In addition, since the fan device 71 on the main box 72 enters between the gutters 61a and 61b of the drain pan 60, the ventilation passage 63 formed between the gutters 61a and 61b can be used as a space for installing the fan device 71. Thereby, the upper surface of the main box 72 can be brought as close as possible to the gutters 61a and 61b, and the height of the main box 72 can be secured while the height of the machine room 14 is suppressed.

  Moreover, by increasing the height dimension of the main box 72, the length of the main box 72 along the depth direction of the housing 2 can be suppressed while securing the internal volume of the main box 72. Therefore, the area occupied by the main box 72 in the machine room 14 can be reduced, which is advantageous in shortening the overall length of the housing 2 as the first section along the depth direction.

  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 operating in the cooling mode, the four-way valves 21 of the first to fourth refrigerant circuits RA, RB, RC, and RD are indicated by solid lines in FIG. As shown, the switching is performed so that the first port 21a communicates with the second port 21b and the third port 21c communicates with the fourth port 21d.

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

  The gas-phase refrigerant guided to the air heat exchangers 29a and 29b is condensed by the heat exchange with the air passing through the air heat exchangers 29a and 29b by the operation of the fan 30, and changes into a high-pressure liquid-phase refrigerant. The high-pressure liquid-phase refrigerant is decompressed 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 another water heat exchanger 25. Exchanger 25 is shared. For this reason, in the first refrigerant circuit RA and the second refrigerant circuit RB, the intermediate-pressure gas-liquid two-phase refrigerant is supplied to the first refrigerant flow path 25a and the second refrigerant flow path 25b of the water heat exchanger 25, respectively. It is guided and exchanges heat with water flowing through the water channel 25c.

  As a result, the gas-liquid two-phase refrigerant flowing through the first refrigerant passage 25a and the second refrigerant passage 25b evaporates and receives heat from the water in the water passage 25c, and the low-temperature, low-pressure gas-liquid Changes to a two-phase refrigerant. The water in the water flow passage 25c becomes cold water by being deprived of latent heat.

  The water passage 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. It is connected in series to a water flow path 25c of another water heat exchanger 25 to be shared.

  For this reason, the water cooled by 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, heat is exchanged again with the gas-liquid two-phase refrigerant flowing through the first refrigerant flow path 25a and the second refrigerant flow path 25b of the other water heat exchanger 25. Let cool. The water cooled in two stages is supplied from the fourth water pipe 46d to the utilization equipment side via the second on-site pipe 56.

  The low-temperature, 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 compressor 20, becomes high-temperature high-pressure gas-phase refrigerant again, and is discharged from the 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 operating in the heating mode, the four-way valves 21 of the first to fourth refrigerant circuits RA, RB, RC, and RD move to FIG. As shown by the broken line, the switching is performed so that the first port 21a communicates with the third port 21c and the second port 21b communicates with the fourth port 21d.

  In the heating mode, the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor 20 is guided to the water heat exchanger 25 via the four-way valve 21. Also in the heating mode, the third refrigerant circuit RC and the fourth refrigerant circuit RD share the water flow path 25c of one water heat exchanger 25 shared by the first refrigerant circuit RA and the second refrigerant circuit RB. Since the water flow path 25c of the other one of the water heat exchangers 25 is connected in series, the water flowing through the water flow path 25c is in a gas phase flowing through the first refrigerant flow path 25a and the second refrigerant flow path 25b. Heating is performed 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 46 d to the utilization device side via the second on-site pipe 56.

  The high-pressure liquid-phase refrigerant that has passed through the water heat exchanger 25 changes into an intermediate-pressure gas-liquid two-phase refrigerant while passing through the receiver 24 and the expansion valves 23a and 23b, and is guided to the air heat exchangers 29a and 29b. I will The gas-liquid two-phase refrigerant guided to the air heat exchangers 29a and 29b evaporates by the 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 is evaporated. Changes 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. You. The gas-phase refrigerant separated from the liquid-phase refrigerant is sucked into the compressor 20, becomes high-temperature high-pressure gas-phase refrigerant again, and is discharged from the compressor 20 to the circulation circuit 27.

  According to the chilling unit 1 of the first embodiment, the first connection end 48 and the second connection end 51 of the water circuit 5 are respectively connected to the stepped portion from the machine room 14 of the housing 2 to the back of the housing 2. 43 is protruded. The step portion 43 is formed by making the length of the housing 2 as the first section shorter than the length of the four sets of air heat exchange portions 22 as the second section, and the rear end of the second section. A space S1 which is recessed from one air heat exchanging part 22 located at the position is defined.

  Therefore, despite the fact that the first connection end 48 and the second connection end 51 of the water circuit 5 project behind the machine room 14, the first connection end 48 and the second connection end 51 fits into the space S1 of the step portion 43 without greatly extending behind the chilling unit 1.

  Therefore, when the chilling unit 1 is installed on the installation surface G on which the first and second on-site pipes 55 and 56 are laid, the chilling unit 1 can be brought closer to the first and second on-site pipes 55 and 56. Becomes

  As a result, the space required for installation of the chilling unit 1 can be reduced, and the installation work of the chilling unit 1 can be performed without difficulty even in a small space.

  Furthermore, according to the first embodiment, the upper end of the main box 72 accommodated in the machine room 14 is projected between the pair of gutters 61a and 61b into the exhaust passage 33 inside the air heat exchange unit 22. The length of the main box 72 along the depth direction of the housing 2 can be reduced while securing the internal volume of the main box 72. Thus, the area occupied by the main box 72 with respect to the machine room 14 is reduced in the depth direction of the housing 2, which effectively contributes to shortening the length of the housing 2 along the depth direction.

  In addition, in the first embodiment, an inverter board for controlling the rotation speed of the impeller 34 of the fan 30 is built in the fan motor 35. As a result, it is not necessary to secure a space for accommodating the inverter board inside the electrical box 70, and the length of the electrical box 70 can be reduced.

  Therefore, the length of the casing 2 as the first section can be made sufficiently shorter than the length of the air heat exchanging section 22 as the second section, and the water circuit 5 is provided behind the casing 2. The step 43 having a space S1 for accommodating the first connection end 48 and the second connection end 51 can be easily obtained.

"Second embodiment"
FIG. 10 discloses a second embodiment.

  The second embodiment discloses a chilling unit 100 of a pumpless specification. In the pump-less chilling unit 100, the water circulation pump 45 is eliminated from the water circuit 5, and the other configuration of the chilling unit 100 is basically the same as that of the first embodiment. Therefore, in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  As shown in FIG. 10, according to the chilling unit 100 of the pumpless specification, an empty space is formed at the rear end of the machine room 14 in which the water circulation pump is housed, so that the first connection end of the water circuit 5 is located in the empty space. The part 48 and the second connection end 51 are accommodated. Therefore, in the present embodiment, the first on-site pipe 55 enters the step 43 behind the housing 2 and the second on-site pipe 56 approaches the step 43 as compared with the first embodiment. I have.

  According to the second embodiment, the first on-site pipe 55 can be routed using the space S1 defined by the step 43. In other words, the casing 2 of the chilling unit 100 is connected to the first site pipe 55 and the second site pipe 55 until the first site pipe 55 enters the step 43 and the second site pipe 56 approaches the step 43. It can be moved to the side of the pipe 56.

  Therefore, the space for installing the chilling unit 1 can be further reduced.

"Third embodiment"
FIG. 11 discloses a third embodiment.

  According to the chilling unit 200 according to the third embodiment, the first step portion 201 is formed behind the housing 2 as the first section, and the second step portion 202 is formed on the front side of the housing 2. ing.

  The first step portion 201 has a space S2 that is continuously open toward the side and the back of the housing 2, and the first connection end portion 48 of the water circuit 5 and the second space S2 are provided in the space S2. The connection end 51 is located. Similarly, the second step portion 202 has a space S3 that is continuously open toward the side and the front of the housing 2, and an optional component 203 such as a piping kit is located in the space S3. I have.

  According to the third embodiment, the second step portion 202 located on the front side of the housing 2 can be used as a space for arranging the optional component 203, and the periphery of the housing 2 can be effectively used.

"Fourth embodiment"
In the first embodiment described above, the heat exhaust fan unit 300 (fan device 71) generates a flow of air inside the electrical box 70, and thereby discharges the hot air inside the electrical box 70 to the outside of the machine. Possible (in other words, the inside of the electrical component box 70 can be cooled (air-cooled)). In such a configuration, the duct unit 81 (the fan device 71 and the heat-dissipating fan unit 300) is provided at the center of the upper surface of the electrical component box 70 (see FIGS. 6, 8, and 9).

  Thus, even when the fan 30 for the air heat exchanging unit 22 stops, the exhaust heat fan unit 300 (the electric fans 82a, 82b, 82c) can be independently operated. As a result, the operation of discharging heat to the inside of the electrical component unit 6 (the electrical component box 70) can be maintained or continued.

  By the way, the arrangement of the fan device 71 (the duct unit 81 and the exhaust heat fan unit 300) is not limited to the central portion on the upper surface of the electrical box 70. In short, the fan device 71 can be disposed on, for example, a side surface or a lower surface of the electrical component box 70 as long as hot air generated from various electrical components (heating components) in the electrical component box 70 can be exhausted.

  In the present embodiment, the above-described exhaust heat fan unit 300 is configured to be drawn out of the duct unit 81 (that is, drawn out of the housing 2). Thereby, the degree of freedom of arrangement of the fan device 71 (the duct unit 81 and the exhaust heat fan unit 300) can be improved. Hereinafter, a specific description will be given.

  As shown in FIG. 12 and FIG. 13, the chilling unit 1 of the present embodiment has an access mechanism 302. The insertion / removal mechanism 302 is configured to be able to pull out or insert (push in) the exhaust heat fan unit 300 into and from the duct unit 81.

  Here, the exhaust heat fan unit 300 is pulled out from the duct unit 81. Thereby, the heat exhaust fan unit 300 can be pulled out of the housing 2. On the other hand, the exhaust heat fan unit 300 is inserted (pushed) into the duct unit 81. Thus, the exhaust heat fan unit 300 can be housed in the duct unit 81 so as to be able to 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. 18), and an operation panel 302c.

  The slider 302a is configured so that the exhaust heat fan unit 300 can be mounted. The sliders 302a are provided on the left and right sides of the exhaust heat fan unit 300 in parallel with each other. The slider 302a is arranged parallel to the depth direction of the housing 2 (the direction from arrow F to R).

  The slider 302a is configured to be able to reciprocate along the guide rail 302b. The guide rails 302b are provided in parallel with each other along both sides of the duct unit 81. The guide rail 302b is arranged to face the slider 302a. That is, the guide rail 302b is arranged in parallel along the depth direction of the housing 2 (the direction from arrow F to R).

  The operation panel 302c is connected to the slider 302a from the front direction F of the housing 2 and forms a front surface of the heat exhaust fan unit 300. The operation panel 302c is provided with a handle portion 302d that can be grasped by a worker with fingers.

  The front direction F of the housing 2 is covered by 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. When 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 housed in the duct unit 81, the worker removes the upper plate 304 from the housing 2 and then grasps the handle portion 302d with his / her finger and pulls it out toward the user. As a result, the slider 302a moves along the guide rail 302b, and the exhaust heat fan unit 300 is drawn out of the duct unit 81 together with the slider 302a.

  In such a state, for example, various maintenance such as cleaning, repair, and replacement of the exhaust heat fan unit 300 (the electric fans 82a, 82b, and 82c) can be easily performed. After the maintenance is completed, the exhaust heat fan unit 300 is housed in the duct unit 81 again.

  That is, the worker can insert the exhaust heat fan unit 300 into the duct unit 81 together with the slider 302a, and house the exhaust heat fan unit 300 in the duct unit 81. After that, the upper plate 304 is attached to the housing 2.

  As described above, according to the present embodiment, the heat-dissipating fan unit 300 is configured to be able to be drawn out of the housing 2 by allowing the heat-dissipating fan unit 300 to be drawn out from the duct unit 81. Thereby, the degree of freedom of arrangement of the fan device 71 can be improved. For example, the fan device 71 can be arranged in a place where it could not be installed because maintenance was conventionally difficult.

  Note that the above configuration of the loading / unloading mechanism 302 is merely an example, and the loading / unloading mechanism 302 may be realized by another configuration.

"Fifth embodiment"
As shown in FIGS. 14 to 16, the chilling unit 1 of the present embodiment includes the above-described fan device 71 (duct unit 81, heat-dissipating fan unit 300), partition bases 305 and 306, a cover 307, and a current plate. 308.

"Partition bases 305, 306"
The partition bases 305, 306 are arranged between the air heat exchange unit 22 and the housing 2 (the machine room 14). The partition bases 305 and 306 are provided one at a 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 area than the lower end of the exhaust passage 33 (see FIG. 9). The partition bases 305, 306 extend between the pair of gutters 61a, 61b.

  The partition bases 305 and 306 are configured to have inclined surfaces M1 and M2 with a downward slope from the center in the left-right direction toward the left and right sides. One end of each of the inclined surfaces M1 and M2 is located at a 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 (ie, the gutters 61a and 61b).

  Further, as shown in FIG. 15, on both left and right sides (the other ends of the inclined surfaces M1 and M2) of the partition bases 305 and 306, a step portion 306b which is lowered is formed. Are provided at intervals. The passage 309 is configured to penetrate the partition bases 305 and 306.

  Here, as shown in FIG. 16, the stepped portions 306b formed on both sides of the partition bases 305, 306 make contact with a part of the lower ends of the air heat exchangers 29a, 29b of the heat exchange section 22 disposed above. It is arranged to be separated from the air heat exchangers 29a and 29b so as not to prevent it. Thereby, good drainage can be ensured at the contact portions between the air heat exchangers 29a and 29b and the partition bases 305 and 306 without obstructing the flow of rainwater or drain water due to surface tension or the like. In addition, the growth of frost and icing under cold conditions can be suppressed, and a decrease in heat exchange performance can be prevented.

  According to the partition bases 305 and 306, water (for example, rainwater) that has dropped or adhered 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 of the step portion 306b on both sides of the partition bases 305, 306 into the gutters 61a, 61b. The dropped water flows through the gutters 61a and 61b, and is then drained through the drain recovery board 62 described above. As the rainwater, for example, rainwater blown into the exhaust passage 33 described above, rainwater flowing down the air heat exchange unit 22 and the like are assumed.

  In the present embodiment, of the above-mentioned partition bases 305 and 306, the duct unit 81 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. I have. The duct unit 81 is provided at a central portion of the partition base 306. The duct unit 81 is configured to protrude from both sides (upper side, lower side) of the partition base 306. The upper side of the partition base 306 refers to the side where the air heat exchange unit 22 (exhaust passage 33) is arranged. The lower side of the partition base 306 refers to the side where the housing 2 (the electrical unit 6 (the electrical box 70)) is arranged.

  Here, the duct unit 81 on the upper side of the partition base 306 is referred to as an upper duct 310, and the duct unit 81 on the lower side of the partition base 306 is referred to as a lower duct 311. In this case, the above-described blowing section 301 can be defined as an opening (blow-out port) of the duct unit 81 (that is, the upper duct 310 and the lower duct 311).

"Cover 307"
The cover 307 is disposed so as to cover the opening (outlet) of the outlet 301, that is, the duct unit 81 (upper duct 310, lower duct 311). In other words, the upper part of the blowing part 301, that is, the upper part of the duct unit 81 (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 (the duct unit 81). The cover 307 and the blow-out portion 301 (duct unit 81) have a positional relationship that is not in contact with each other (see FIGS. 18 to 19).

  The cover 307 may be attached to the duct unit 81 (particularly, the upper duct 310), or may be set to be supported by the partition base 306. Good.

  The cover 307 is configured to have a contour having a downward slope from the center portion toward both sides. The cover 307 includes a front surface 307a (hereinafter, referred to as a cover front surface) and a back surface 307b (hereinafter, referred to as a cover back surface). The cover front surface 307a and the cover back surface 307b are configured to be opposed to and parallel to each other. The cover front surface 307a and the cover back surface 307b have shapes along the contour of the cover 307. That is, the cover front surface 307a and the cover back surface 307b have a downward slope from the center to both sides.

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

  According to the cover 307, water (for example, rainwater) that has dropped or adhered to the cover surface 307a flows down along the cover surface 307a. The water that has flowed down falls on the base surfaces (inclined surfaces M1, M2) from both sides of the cover surface 307a. 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) into the gutters 61a and 61b. The dropped water flows through the gutters 61a and 61b, and is then drained through the drain recovery board 62 described above.

  On the other hand, the hot air blown out from the blowout portion 301 of the duct unit 81 (the upper duct 310 and the lower duct 311) by the above-described exhaust heat fan unit 300 (the electric fans 82a, 82b, 82c) flows along the cover back surface 307b. Flow. That is, the hot air flows from the central portion of the cover back surface 307b toward both sides. The hot air flowing to both sides passes between the cover back surface 307b and the duct unit 81 (specifically, the upper duct 310), and then flows out from both sides of the cover 307.

"Rectifier plate 308"
The current plate 308 is spaced apart from both sides of the cover 307 by a predetermined distance. One current plate 308 is provided at a position facing both sides of the cover 307. In the drawing, as an example, one straightening plate 308 is arranged on each of the base surfaces (inclined surfaces M1, M2) of the partition base 306. The rectifying plates 308 have a positional relationship facing each other in parallel. The current plate 308 rises 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 surfaces (the inclined surfaces M1 and M2). Here, when the above-mentioned current plate 308 is not provided, the hot air directly reaches the air heat exchange unit 22. Then, there is a possibility that the exchange efficiency of the air heat exchange unit 22 may be reduced by the reached hot air.

  However, in the present embodiment, the above-mentioned current plate 308 is arranged. Therefore, 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, such hot air is regulated in a direction to avoid the air heat exchange unit 22. In other words, the hot air does not directly reach the air heat exchange unit 22. Thereby, the exchange efficiency of the air heat exchange unit 22 can be maintained constant.

  Further, the flow plate 312 is provided in the current plate 308 toward the base surface (the inclined surfaces M1 and M2) of the partition base 306. The flow path 312 is configured to penetrate the current plate 308. A plurality of flow paths 312 are arranged along the current plate 308. In this case, the water (rainwater) that has dropped onto the base surfaces (inclined surfaces M1, M2) from both sides of the above-described cover surface 307a passes through the plurality of flow paths 312 when reaching the current plate 308. Thus, the water flows down along the base surfaces (inclined surfaces M1, M2) smoothly and without leakage, without being blocked by the current plate 308.

"Sixth embodiment"
As shown in FIGS. 17 to 19, the chilling unit 1 of the present embodiment is assembled so as to be able to be divided (separated). That is, the chilling unit 1 has an upper section 1a which is a second section located at an upper part, and a lower section 1b which is a first section located at a lower part. The upper section 1a can be connected (integrated) to the lower section 1b so as to be separable (separable).

  In the present embodiment, the above-described fan device 71 (see FIG. 16) can be separated (divided) into an upper fan device 71a and a lower fan device 71b, and the upper fan device 71b can be separated from the lower fan device 71b. The device 71a is configured to be connectable. In this case, the upper section 1a includes, for example, the upper fan device 71a and the air heat exchange unit 22. The lower section 1b includes, for example, a lower fan device 71b and the housing 2 (the machine room 14 (the electrical unit 6)).

  In the present embodiment, the above-described duct unit 81 is configured to be separable (divided) into an upper duct 310 and a lower duct 311, and to be able to connect the upper duct 310 to the lower duct 311. I have. In this connection state, the above-mentioned partition base 306 is interposed between the upper duct 310 and the lower duct 311.

  The upper duct 310 is arranged on the upper side of the partition base 306. The upper duct 310 is fixed to a base surface (inclined surfaces M1, 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 is supported by either the upper duct 310 or the partition base 306.

  The lower duct 311 is disposed below the partition base 306 (that is, on the back side). The lower duct 311 is kept 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, each of the upper duct 310 and the lower duct 311 has a hollow rectangular shape. In this case, a hollow upper opening 310a is formed in the upper duct 310. 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 faces and communicates with the upper opening 310a and the lower opening 311a. In the drawing, a rectangular base opening 306a is shown as an example.

  Here, the above-described blow-off portion 301 (the opening (outlet) of the duct unit 81) includes 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 connected (connected) to each other in this order, thereby forming a series of blow-out portions 301.

"Upper fan device 71a, lower fan device 71b"
The upper fan device 71a has, for example, an upper duct 310, a partition base 306, and a cover 307 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 section 22 (upper section 1a).

  The lower fan device 71b includes, for example, a lower duct 311 and a heat exhaust fan unit 300 (electric fans 82a, 82b, 82c) as main components. The exhaust heat fan unit 300 (the electric fans 82a, 82b, 82c) is housed in the lower duct 311. According to the specification to which the access mechanism 302 of the second embodiment is applied, the exhaust heat fan unit 300 (the electric fans 82a, 82b, 82c) is housed in the lower duct 311 by the access mechanism 302 so as to be able to enter and exit. .

  Here, the upper section 1a is connected to the lower section 1b. The air heat exchanging unit 22 is disposed above the housing 2 (the machine room 14 (the electrical 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 mutually connected. Specifically, the upper duct 310 is fixed to a base surface (inclined surfaces M1, M2) of the partition base 306. Therefore, the lower duct 311 is connected to the lower portion (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 interconnected 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 having the series of blow-out portions 301 is assembled.

  According to this configuration, the fan device 71 (upper section 1a) is separated (divided) into the upper fan device 71a (upper duct 310) and the lower fan device 71b (lower duct 311). Thereby, when assembling the chilling unit 1, 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 safely and accurately connected (integrated) in a short time.

"Buffer 314"
As shown in FIGS. 18 and 19, the chilling unit 1 of the present embodiment has a cushioning material 314. The cushioning member 314 is disposed between the upper section 1a and the lower section 1b.

  According to such a configuration, when connecting the upper section 1a and the lower section 1b, the cushioning material 314 is elastically deformed. At this time, the shock at the time of connection is absorbed by the cushioning material 314 and removed. Thus, it is possible to prevent a situation in which 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 (damaged) due to the impact at the time of connection.

  Further, as the cushioning member 314 is elastically deformed, the manufacturing intersection or the design intersection is absorbed and removed. Therefore, 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 remarkably improved.

  In addition, the provision of the cushioning material 314 can improve the sealing performance between the upper section 1a and the lower section 1b. For example, the cushioning material 314 is disposed between the upper duct 310 and the lower duct 311. Thereby, the cushioning member 314 is elastically deformed in a state where the upper duct 310 and the lower duct 311 are connected. As a result, the cushioning material 314 closely adheres between the upper duct 310 and the lower duct 311 without a gap.

  In the drawing, a cushioning 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 member 314 has no gap between the upper end of the lower duct 311 and the lower portion (the back surface) of the partition base 306. In close contact. Thereby, a series of blowing parts 301 having excellent sealing properties can be realized. Thus, the sealing performance of the blow-off portion 301 is kept constant.

"Water receiving mechanism"
As shown in FIGS. 18 and 19, the chilling unit 1 of the present embodiment has a water receiving mechanism. The water receiving mechanism is provided inside the blowing section 301 (duct unit 81). The water receiving mechanism prevents, for example, water (for example, rainwater) existing inside the upper section 1a (the air heat exchange unit 22) from entering the inside of the lower section 1b (the machine room 14 (the electrical unit 6)). It is configured to be possible.

  The water receiving mechanism includes a water receiving shelf 315. The water receiving shelf 315 is configured to protrude toward the inside of the blowing unit 301 (the duct unit 81). The water receiving shelf 315 is continuously formed along the inside of the blow-out part 301 (duct unit 81). The water receiving shelf 315 is configured to continuously partially cover the inside of the opening of the outlet 301 (the duct unit 81). The water receiving shelf 315 protrudes at an angle in the horizontal direction or an angle of ascending slope. The angle of the ascending slope refers to an inclination angle in a direction between the horizontal direction and the vertical direction.

"Specific specifications of water receiving shelf 315"
In the drawing, as an example, a part of the partition base 306 is used as a water receiving shelf 315. That is, the upper opening 310a of the upper duct 310 is set to be larger (wider) than the base opening 306a of the partition base 306. In other words, the base opening 306a of the partition base 306 is set smaller (narrower) than the upper opening 310a of the upper duct 310. As a method of realizing such a setting, for example, the upper duct 310 is configured to be larger (wider) than the base opening 306a, or the base opening 306a is configured to be smaller (narrower) than the upper duct 310.

  Thus, a water receiving shelf 315 that partially covers the inside of the lower end of the upper opening 310a continuously inside the lower end of the upper duct 310 is realized. In this case, the water receiving shelf 315 has a structure protruding (protruding) inward from the upper opening 310a of the upper duct 310. Further, 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 shelf 315 using a part of the water receiving shelf 315 is configured to have an inclination angle of an upward slope toward the inside of the upper opening 310a.

  Further, a combination of the water receiving shelf 315 and the upper duct 310 realizes a water storage structure. The water storage structure is configured such that the water receiving shelf 315 and the upper duct 310 cooperate to temporarily store a certain amount of water. Thus, the water receiving mechanism has a function as a water storage structure.

  According to such a water reservoir mechanism, even when water (for example, rainwater) existing inside the upper section 1a (air heat exchange section 22) enters the blowout section 301 (duct unit 81), the blowout section 301 (duct) Water (rainwater) that falls along the inside of the unit 81) is received by the water receiving shelf 315 described above. The received water (rainwater) is stored between the water receiving shelf 315 and the upper duct 310. Thus, the water can be prevented from entering the inside of the lower section 1b (the machine room 14 (the electrical unit 6)).

"Water drain mechanism"
As shown in FIGS. 18 and 19, 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 drainage mechanism includes a drainage passage 316. The drain passage 316 is provided in the duct unit 81 (specifically, the upper duct 310 described above).

  The drain passages 316 are provided at intervals along the lower end of the upper duct 310. The drain passage 316 is configured to penetrate the lower end of the upper duct 310. The drain passage 316 penetrates toward the base surface (inclined surfaces M1, M2) of the partition base 306.

  In this case, the water (rainwater) stored by the water storage structure is extracted to the base surfaces (inclined surfaces M1, M2) through the drain passage 316. 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) into the gutters 61a and 61b. The dropped water flows through the gutters 61a and 61b, and is then drained through the drain recovery board 62 described above.

  According to such a drainage mechanism, the water (rainwater) stored by the water receiving mechanism (water storage structure) is drained from the drainage passage 316. Thereby, it is possible to prevent the stored water (rainwater) from overflowing from the water storage structure and dropping into the blowing portion 301 (the upper opening 310a, the base opening 306a, and the lower opening 311a). Thus, the water can be prevented from entering the inside of the lower section 1b (the machine room 14 (the electrical unit 6)).

  By the way, the pressure state is reversed above and below the above-described exhaust heat fan unit 300 (the electric fans 82a, 82b, 82c). For example, in the exhaust heat operation state, the lower side of the exhaust heat fan unit 300 (the electric fans 82a, 82b, 82c), that is, the inside of the electrical unit 6 (the electrical box 70) has a negative pressure. On the other hand, the pressure state above the heat-dissipating fan unit 300 (the electric fans 82a, 82b, 82c), that is, the pressure state of the blow-out section 301 is positive.

  Thereby, at the time of exhaust heat, the stored water (rainwater) is always subjected to the pressure action by the positive pressure. As a result, the water is continuously 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 inside of the lower section 1b (the machine room 14 (the electrical unit 6)).

  In the above embodiment, the power supply box 70 has been described as being disposed on the bottom plate of the machine room 14, but the power supply box 70 is not provided with the bottom plate, and the main frame 7 disposed in the machine room 14 is not provided. The main box 72 may be directly fixed.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various 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 their equivalents.

1a: Upper section, 1b: Lower section, 2: First section (housing), 14: Machine room, 20, 21, 23a, 23b, 24, 25, 26: Refrigeration cycle components (compressor, four-way valve) , Expansion valve, receiver, water heat exchanger, gas-liquid separator), 22... Second section (air heat exchange section), 43, 201, 202... Step section (first step section, second step section) ), 46a, 46b, 46c, 46d: water pipes (first to fourth water pipes), 48, 51: connection ends (first connection end, second connection end), 60: drain pan, Reference numeral 70: electrical box, 71: fan device, 72: main box, 81: duct unit, 300: heat exhaust fan unit, 305, 306: partition base, 310: upper duct, 311: lower duct, 310a: upper opening, 311a …beneath Opening, 306a: Base opening, 306b: Step, 314: Buffer material, 315: Water receiving shelf (water receiving mechanism), 316: Water drain passage (water draining mechanism).

Claims (8)

In a refrigeration cycle apparatus provided with a heat exchange chamber in the upper part and a machine room in the lower part that houses a compressor of the refrigeration cycle,
An electrical box arranged in the machine room and including the compressor, for controlling a refrigeration cycle operation,
An exhaust heat fan unit capable of generating a flow of air inside the electrical component box,
A duct unit that houses the exhaust heat fan unit, and that discharges air inside the electrical box to the heat exchange chamber by the flow of air .
The outlet of the duct unit is configured to face directly above the exhaust heat fan unit,
A refrigeration cycle apparatus wherein the upper end of the duct unit is positioned so as to partially enter the heat exchange chamber .   2. The refrigeration cycle apparatus according to claim 1, wherein the duct unit is configured to allow communication between the inside of the electrical box and the heat exchange chamber. 3. An exhaust passage through which hot air inside the electrical box is released,
2. The refrigeration cycle apparatus according to claim 1, wherein the duct unit is configured to be able to communicate between the inside of the electrical component box and the exhaust passage. 3. The duct unit is provided with a blowing unit configured to face the exhaust heat fan unit,
Further comprising a cover arranged to cover the blowing portion,
The refrigeration cycle apparatus according to claim 1, wherein the cover is configured to have a profile having a downward slope from a center portion toward both sides. A current plate provided around the cover, further comprising:
The refrigeration cycle apparatus according to claim 4, wherein the flow direction of the air that has flowed out from both sides of the cover through the blowing section is restricted by the rectifying plate. A housing for supporting the electrical box,
Further comprising an air heat exchange section disposed above the housing,
The refrigeration cycle apparatus according to claim 5, wherein a flow direction of the hot air flowing out from both sides of the cover through the blow-out portion is restricted by the flow straightening plate in a direction to avoid the air heat exchange portion.   The refrigeration cycle apparatus according to claim 1, further comprising an access mechanism that allows the exhaust heat fan unit to be drawn in and out of the duct unit. The take-out mechanism,
A slider on which the exhaust heat fan unit can be mounted,
A guide rail arranged to face the slider,
An operation panel connected to the slider,
The refrigeration cycle apparatus according to claim 7, further comprising: a handle provided on the operation panel, wherein the handle can be grasped by a finger of an operator.

Images