WO2011099629A1 - チリングユニット - Google Patents

チリングユニット Download PDF

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Publication number
WO2011099629A1
WO2011099629A1 PCT/JP2011/053166 JP2011053166W WO2011099629A1 WO 2011099629 A1 WO2011099629 A1 WO 2011099629A1 JP 2011053166 W JP2011053166 W JP 2011053166W WO 2011099629 A1 WO2011099629 A1 WO 2011099629A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
water
refrigeration cycle
unit
air
Prior art date
Application number
PCT/JP2011/053166
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
邦雄 室井
英樹 丹野
成浩 岡田
光輔 小澤
裕昭 渡邉
憲二郎 松本
孝光 石黒
Original Assignee
東芝キヤリア株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東芝キヤリア株式会社 filed Critical 東芝キヤリア株式会社
Priority to CN201180009461.XA priority Critical patent/CN102753895B/zh
Priority to JP2011553918A priority patent/JP5401563B2/ja
Priority to KR1020127021053A priority patent/KR101388844B1/ko
Publication of WO2011099629A1 publication Critical patent/WO2011099629A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/18—Heat exchangers specially adapted for separate outdoor units characterised by their shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/16—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/36—Drip trays for outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/46—Component arrangements in separate outdoor units
    • F24F1/48—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow
    • F24F1/50—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow with outlet air in upward direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/60—Arrangement or mounting of the outdoor unit
    • F24F1/68—Arrangement of multiple separate outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F24F2013/207—Casings or covers with control knobs; Mounting controlling members or control units therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/06—Several compression cycles arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel

Definitions

  • the present invention relates to a chilling unit that constitutes, for example, an air conditioner, a heat pump water heater, or the like applied to a large-scale building or the like.
  • a so-called chilling unit which is a heat exchange unit, is disclosed.
  • the chilling unit (heat exchange unit) is housed in a heat exchange chamber, a machine room, an air heat exchanger disposed in the heat exchange room, a blower for blowing air to the air heat exchanger, and the machine room.
  • Refrigeration cycle components that are used (for example, Japanese Patent Application Laid-Open No. 2007-163017).
  • the air heat exchangers are arranged to face each other in a substantially V shape when viewed from the front.
  • the machine room is formed in a substantially inverted V shape when viewed from the front, and houses a compressor, a four-way valve, an expansion valve that expands the refrigerant, a water heat exchanger that exchanges heat between water and the refrigerant, and the like.
  • the air heat exchanger communicates with the air heat exchanger via the refrigerant pipe.
  • the chilling unit requires a water circulation pump and water piping for guiding water to the water heat exchanger, and receives the control signals from the remote control (remote control panel) and the detection signals from various sensors to A control box that houses electronic components that send control signals to the components is also necessary, but there is no description about them.
  • this type of chilling unit is installed on a large-scale building, for example, on the rooftop or on a dedicated site separately provided.
  • a water supply / drainage facility, a power supply facility, and the like are also installed, and in the case of a rooftop, an elevator driving device and the like are also installed.
  • an elevator driving device and the like are also installed.
  • each side of a plurality of chilling units is provided side by side and arranged in a plurality of rows.
  • this configuration even if there is a space along the outer surface side of the chilling units on both sides, there is no passage on both sides of the chilling unit in the middle row, and maintenance work for the control box becomes extremely inconvenient. End up.
  • the present invention has been made on the basis of the above circumstances, and the object of the present invention is to set a control box that accommodates electronic components for receiving various signals and controlling electric components at an optimal position, An object of the present invention is to provide a chilling unit capable of facilitating maintenance work for a control box and improving workability.
  • the chilling unit of the present invention is housed in a housing in which a heat exchange section having an air heat exchanger is mounted on the upper portion and a machine room is formed therein, and in a machine room in the housing.
  • a plurality of independent refrigeration cycle units composed of refrigeration cycle equipment excluding air heat exchangers, and a control box equipped with one water circulation pump and control electronic components, from the back side of the housing to the front side
  • the water circulation pump, the first refrigeration cycle unit, the second refrigeration cycle unit, and the control box were arranged.
  • FIG. 1 is a perspective view of a chilling unit according to an embodiment of the present invention.
  • FIG. 2 is a side view of the chilling unit in a state where a side panel covering the machine room according to the embodiment is removed.
  • FIG. 3 is a perspective view of the inside of the machine room according to the embodiment, and is a view for explaining a mounting structure from the first drain pan to the fourth drain pan.
  • FIG. 4 is a perspective view of a single heat exchanger module according to the embodiment.
  • FIG. 5 is an exploded perspective view of the heat exchanger module according to the embodiment.
  • FIG. 6 is a perspective view of a first drain pan according to the embodiment.
  • FIG. 7 is a perspective view around the water circulation pump and the water pipe according to the embodiment.
  • FIG. 8 is a configuration diagram of the refrigeration cycle of the chilling unit according to the embodiment.
  • FIG. 9 is a perspective view illustrating an air suction port provided in the lower frame of the housing according to the same embodiment.
  • FIG. 10 is a diagram for explaining the state of the airflow relating to the air suction port according to the embodiment.
  • FIG. 1 is a perspective view of the assembled chilling unit Y
  • FIG. 2 is a side view of the chilling unit Y in a state in which a side panel 2a of a machine room 2 described later is removed.
  • This chilling unit Y generates cold water or hot water, for example, cools the air with the obtained cold water to cool the room (indoor), or warms the air with the obtained hot water to heat the room (indoor). Eggplant.
  • the air conditioner it can be used as a heat pump hot water supply device.
  • the chilling unit Y is formed in a rectangular shape from a longitudinal direction and a short direction parallel to each other in a plan view. And it is inconvenient for the operator to pass along the other direction by forming a passage T through which the worker can pass along one short direction.
  • a passage T through which the worker can pass along one short direction.
  • a space space may be used instead of the passage T.
  • the short side end surface (right side surface in FIG. 2) is “front N”, the back side end surface (left side surface) is “back H”, and the end surface parallel to the longitudinal direction (front side front) is along the passage T in FIG. Determined as “Side E”.
  • the substantially lower half of the chilling unit Y in the vertical direction includes a housing F.
  • the heat exchange unit 1 is placed on the housing F, and the machine room 2 is formed inside the housing F.
  • the heat exchanging section 1 is composed of a plurality (here, four sets) of heat exchanger modules M and the same number of blowers S.
  • a pair (two) of air heat exchangers 3 and 3 are arranged to face each other, and a blower S is arranged between the upper ends of these air heat exchangers 3 and 3. It becomes.
  • a top plate 4 is provided at the upper end of each heat exchanger module M, and the blower S is attached to a position of the top plate 4 facing the heat exchanger module M. If it demonstrates, the cylindrical blowing outlet 5 will protrude upwards from the top plate 4, and the fan guard 6 has covered the protrusion end surface of this blowing outlet 5.
  • the air heat exchangers 3 and 3 constituting the heat exchanger module M face each other so that the top plate 4 side as the upper end portion is wide and the machine room 2 side as the lower end portion is close and close to each other. They are inclined to form a V shape.
  • the housing F on which the heat exchange unit 1 is mounted includes an upper frame Fa, a lower frame Fb, and a vertical frame Fc that connects the upper frame Fa and the lower frame Fb.
  • the upper frame Fa is provided with a crosspiece Fd (see FIG. 3).
  • three side plates 2a are attached to the side surface E along the longitudinal direction of the casing F, and end plates 2b are attached to the front surface N and the rear surface H along the short side direction. Is referred to as the machine room 2.
  • the upper frame Fa and the lower frame Fb are each assembled so as to form a horizontally long rectangular shape in plan view.
  • the short dimension is such that the front frame N and the rear surface H are both shorter in the upper frame Fa and longer in the lower frame Fb. That is, the short direction dimension of the upper frame Fa is short according to the short direction dimension of the heat exchanger module M constituting the heat exchange unit 1. Therefore, the vertical frame Fc connecting the upper frame Fa and the lower frame Fb is provided so as to be inclined so that the dimension in the depth direction sequentially increases from the upper part to the lower part. ) It is formed in a substantially inverted V shape when viewed.
  • the heat exchanging part 1 mounted on the housing F is inclined so that the front view gradually decreases from the upper end to the lower side and is substantially V-shaped, and the housing F is directed from the upper end to the lower side. Therefore, the front view as the chilling unit Y is formed in a substantially drum shape with the central portion constricted.
  • the machine room 2 formed in the housing F includes, in order from the rear surface H to the front surface N, a variable capacity water circulation pump 13, a first refrigeration cycle unit 1 RA, Second refrigeration cycle unit 2RB and control box 8 are arranged.
  • control box 8 is disposed at the position closest to the front face N
  • water circulation pump 13 is disposed at the position closest to the rear face H
  • second refrigeration is provided between the control box 8 and the water circulation pump 13.
  • the cycle unit 2RB and the first refrigeration cycle unit 1RA are arranged.
  • control box 8 the first and second refrigeration cycle units 1RA and 2RB, the water circulation pump 13, the refrigerant pipe and the water pipe are housed in the machine room 2, but all of these are accommodated.
  • the components are housed inside the side plate 2a and the end plate 2b constituting the housing F. That is, there is no member exposed from the housing F in the completed chilling unit Y shown in FIG.
  • FIG. 3 is a perspective view of the inside of the machine room 2 and is a view for explaining an attachment structure from the first drain pan 7a to the third drain pan 7c.
  • first drain pans 7a are placed on the upper frame Fa constituting the housing F. Although not particularly shown, a drain hose is connected to each first drain pan 7a to guide drain water to the second drain pan 7b.
  • the two second drain pans 7b are provided.
  • the first refrigeration cycle unit 1RA is placed on one drain pan 7b
  • the second refrigeration cycle unit 2RB is placed on the other drain pan 7b. Accordingly, the second drain pans 7b are arranged in series between the back H side end of the control box 8 and the back H side end of the lower frame Fb.
  • Second drain pan 7b is supported on the support member has a shown.
  • the support member of the drain pan 7b is provided across the short direction of the lower frame Fb, and is provided at a predetermined interval in the longitudinal direction.
  • the third drain pan 7c is supported on the lower frame Fb with a predetermined interval on the lower side of the second drain pan 7b.
  • the short side dimension of the third drain pan 7c is the same as the same direction dimension of the second drain pan 7b, and the long side dimension is the same as the full length dimension of the two second drain pans 7b arranged in series. .
  • the air heat exchanger 3 exchanges heat with air, and condenses moisture contained in the air to form drain water.
  • the drain water is in the form of water droplets and adheres to the surface, but gradually becomes enlarged and flows down to the respective first drain pans 7a.
  • the drain water is collected in the second drain pan 7b on the lower side through the drain hose.
  • the drain water is also generated in the component parts of the first and second refrigeration cycle units 1RA and 2RB, and is received by the second drain pan 7b, and then collected in the third drain pan 7c and drained to the outside. It has become.
  • the water circulation pump 13 is disposed at the rear H side end of the machine room 2, and the first water heat exchanger 11 is disposed in the vicinity of the water circulation pump 13. And the 1st receiver 10a and the 2nd receiver 10b which are mentioned later along the near side longitudinal direction of the housing
  • the third receiver 10c and the fourth receiver 10d are juxtaposed from the second water heat exchanger 12 along the longitudinal direction of the front side of the housing F, and in particular, the fourth receiver 10d is disposed close to the control box 8. Is done.
  • a first water pipe P1 (shown in FIGS. 2 and 7) is connected to the water circulation pump 13, and this is used as a return pipe from a place to be air-conditioned as an introduction pipe.
  • a second water pipe P ⁇ b> 2 is connected across the water circulation pump 13 and the upper part of the first water heat exchanger 11.
  • a third water pipe P3 is connected across the lower portion of the first water heat exchanger 11 and the upper portion of the second water heat exchanger 12.
  • a lower part of the second water heat exchanger 12 is connected to a fourth water pipe P4 extending in the direction of the water circulation pump 13 and having an end arranged in parallel with the first water pipe P1.
  • the fourth water pipe P4 is extended as a lead-out pipe to a place to be air-conditioned.
  • a refrigeration cycle apparatus 1K consisting of: These are communicated via a refrigerant pipe, and two sets of air heat exchangers 3 each constituting a heat exchanger module M on the rearmost H side and a heat exchanger module M located on the front side. , 3 and two independent refrigeration cycles are connected via a refrigerant pipe to constitute the first refrigeration cycle unit 1RA.
  • a refrigeration cycle device 2K comprising: These are communicated via a refrigerant pipe, and two sets of air heat exchangers 3 respectively constituting a heat exchanger module M on the most front N side and a heat exchanger module M located on the far side. , 3 and 2 are connected via a refrigerant pipe so as to form two independent refrigeration cycles, and the second refrigeration cycle unit 2RB is configured.
  • the machine room 2 in the housing F includes the first refrigeration cycle unit 1RA and the second refrigeration unit which are independent from each other except for the air heat exchangers 3 constituting the four heat exchanger modules M.
  • the cycle unit 2RB is accommodated, and the respective refrigeration cycle units 1RA and 2RB are placed on the second drain pan 7b.
  • the first water heat exchanger 11 and the second water heat exchanger 12 communicate with each other in series via the first water pipe to the fourth water pipes P1 to P4, and the refrigeration cycle units 1RA and 2RB are connected to each other.
  • the two refrigeration cycle devices 1K and 2K are connected in parallel to one water heat exchanger 11 and 12, respectively.
  • FIG. 4 is a perspective view of a single heat exchanger module M
  • FIG. 5 is an exploded perspective view of the heat exchanger module M.
  • the heat exchanging unit 1 shown in FIGS. Is configured.
  • the air heat exchangers 3 constituting the adjacent heat exchanger module M are juxtaposed with each other with a slight gap therebetween.
  • the single heat exchanger module M is composed of a pair of air heat exchangers 3 and 3 as described above.
  • the single air heat exchanger 3 includes a flat plate portion 3a having a substantially rectangular shape when viewed from the side, and a bent piece portion 3b that is bent along the left and right side portions of the flat plate portion 3a.
  • a pair of the air heat exchangers 3 is prepared, the bent pieces 3b are opposed to each other, and are inclined so as to be substantially V-shaped when viewed from the front. Therefore, a substantially V-shaped space portion is formed between the opposed bent piece portions 3b and 3b of the opposed air heat exchangers 3 and 3, and this space portion is cut into a substantially V-shape. It is closed by a shielding plate 15 which is a plate.
  • the shielding plate 15 is provided on both right and left sides of the heat exchanger module M. Therefore, as shown in FIGS. 1 and 2, when the four heat exchanger modules M are arranged in parallel, the shielding plates 15 are provided close to each other in the adjacent heat exchanger modules M.
  • the air heat exchanger 3 is arranged in a state in which substantially strip-shaped fins that are short in the horizontal direction and extremely long in the vertical direction are erected, are arranged with a narrow gap between them, and a heat exchange pipe is passed therethrough. Become.
  • the heat exchange pipes are arranged in a plurality of rows with gaps in the lateral direction of the fins and meandering in the longitudinal direction of the fins.
  • Both sides of the flat plate air heat exchanger 3 are bent in the same direction to form bent pieces 3b along both sides, and the space between the bent pieces 3b remains as a flat plate 3a.
  • the longitudinal dimension of the chilling unit Y can be shortened, the installation space can be reduced, and the heat exchange efficiency can be improved.
  • the fixed frame 16 is stretched over the upper and lower ends of the flat plate portion 3 a of the air heat exchanger 3.
  • the upper end of the fixed frame 16 is bent in a bowl shape (substantially U-shaped) and is hooked over the inner surface upper portion, the upper end surface, and the outer surface upper portion of the flat plate portion 3a.
  • the fixed frame 16 is formed in a ladder shape, and can be used as a scaffold for an operator during maintenance work.
  • a fan base 50 as a connecting member is installed between the upper ends of the fixed frame 16. The inclination angle of the air heat exchanger 3 is maintained.
  • a fan motor 51 constituting the blower S is attached to the fan base 50, and a fan 52 is fitted on the rotating shaft of the fan motor 51. As described above, the fan 52 is disposed so as to face the cylindrical outlet 5 provided in the top plate 4, and the fan guard 6 is provided in the outlet 5.
  • the lower end portion of the fixed frame 16 is attached and fixed to the first drain pan 7a in a state where the air heat exchanger 3 is tilted obliquely. However, since the air heat exchanger 3 is tilted, the air heat exchanger 3 is tilted. 3 and a gap between the lower end surface of the first drain pan 7a. Therefore, the first drain pan 7a is configured as described below.
  • FIG. 6 is a perspective view of the first drain pan 7a.
  • the first drain pan 7a has a rectangular dish shape, and is gradually inclined downward from both side end portions in the lateral direction toward the central portion. Accordingly, a linear deepest portion e is formed in the central portion of the first drain pan 7a along the longitudinal direction, and a drain port 55 to which the drain hose is connected is provided at a part of the deepest portion e.
  • a pair of heat exchanger pedestals 57 are provided opposite to each other on both ends of the first drain pan 7a. Contrary to the inclination direction of the first drain pan 7a, each heat exchanger base 57 is gradually inclined upward from both side end portions in the short direction toward the central portion, and the central portion is the highest. The side edges in the short direction are the lowest.
  • the bent piece portion 3 b constituting the heat exchanger 3 is placed on the heat exchanger base 57. Accordingly, the heat exchanger pedestal 57 fills the gap between the lower end surface of the air heat exchanger 3 and the first drain pan 7a, and the heat exchange efficiency of the air heat exchanger 3 is not affected.
  • the first drain pan 7a is provided with a pair of flat piece portions 58 opposed to each other between the heat exchanger bases 57 provided on the left and right.
  • Each flat piece portion 58 is formed long in a direction orthogonal to the heat exchanger base 57, and the lower end portion of the fixed frame 16 is placed on each flat piece portion 58.
  • the lower end portion of the fixed frame 16 is fixed to the flat piece portion 58 with a screw or the like.
  • Two cylindrical bodies 59 are provided side by side between one end portions of each flat piece portion 58, and a refrigerant pipe connected to the air heat exchanger 3 is inserted into each cylindrical body 59.
  • Small-diameter cylindrical bodies 60 are provided at opposite ends of the flat piece portions 58, and a power cord connected to the fan motor 51 is inserted into the cylindrical bodies 60.
  • FIG. 7 is a perspective view of only the water circuit Z.
  • the water circulation pump 13 is connected to the first water pipe P1 as an introduction pipe, and the water circulation pump 13 and the first water heat exchanger 11 are communicated with each other through the second water pipe P2.
  • a third water pipe P3 communicates with the first water heat exchanger 11 and the second water heat exchanger 12, and a fourth water pipe P4 is provided as a lead-out pipe below the second water heat exchanger 12. Is connected.
  • the water circulation pump 13 is disposed at a substantially intermediate portion between the lowermost portion and the uppermost portion of the water circuit Z. As a result, even if air is mixed into the water circuit Z, the air does not accumulate in the water circulation pump 13. There is always priming water inside the water circulation pump 13, and it is possible to prevent the water circulation pump 13 from being poorly activated due to air contamination.
  • the first water pipe P1 and a part of the second water pipe P2 are present at the highest portion of the water circuit Z in the height from the arrangement surface of the chilling unit Y.
  • the automatic air venting device 61 is provided in a part of the first water pipe P1 and the second water pipe P2 which are the highest parts of the water circuit Z.
  • the automatic air vent device 61 has a float in the valve body, and when air accumulates around the float, the float loses buoyancy and sinks, and the valve opens. That is, the air in the water pipe is automatically removed from the valve body by opening the valve.
  • the automatic air venting device 61 since the automatic air venting device 61 is provided, air is automatically discharged to the outside, and air does not accumulate inside the water circulation pump 13.
  • the water circulation pump 13 always has priming water, which prevents starting failure due to air contamination.
  • the automatic air vent device 61 is provided with a check valve. Since there are many cases where the water pipe Z has a negative pressure, this is provided in order to prevent air mixture (backflow) when a reverse pressure is applied.
  • FIG. 8 is a configuration diagram of the refrigeration cycle of the chilling unit Y including the first to fourth refrigeration cycles R1 to R4.
  • the first and second refrigeration cycles R1 and R2 constitute the first refrigeration cycle unit 1RA
  • the third and fourth refrigeration cycle units R3 and R4 constitute the second refrigeration cycle unit 2RB.
  • the first port of the four-way valve 18 is connected to the discharge side refrigerant pipe of the variable capacity compressor 17, and the refrigerant pipe connected to the second port of the four-way valve 18 is branched to form a pair of air heat exchangers. 3 and 3 are communicated.
  • the pair of air heat exchangers 3, 3 are provided to face each other as described with reference to FIGS. 4 and 5 and constitute a set of heat exchanger modules M.
  • the heat exchange pipes constituting each of the air heat exchangers 3 and 3 are collected into a collecting pipe and communicated with a branched refrigerant pipe provided with an expansion valve 19.
  • the branched refrigerant pipes are also combined into one, and communicated with the first refrigerant flow path 40 provided in the first water heat exchanger 11 via the first receiver 10a.
  • the expansion valve 19 was each provided in the branched refrigerant pipe, it is not limited to this, You may make it provide in the refrigerant pipe which put the branched refrigerant pipe into one. Therefore, one expansion valve 19 may be used.
  • the first refrigerant flow path 40 communicates with the third port of the four-way valve 18 via a refrigerant pipe.
  • the fourth port of the four-way valve 18 communicates with the suction portion of the compressor 17 via the gas-liquid separator 20 via the refrigerant pipe.
  • a first water pipe P1 that is a return pipe from a place to be air-conditioned is connected to the water circulation pump 13.
  • the water circulation pump 13 is connected to the water flow path 33 in the first water heat exchanger 11 through the second water pipe P2.
  • the water flow path 33 of the first water heat exchanger 11 is communicated with the water flow path 33 of the second water heat exchanger 12 via the third water pipe P3.
  • the fourth water pipe P4 communicates with the water flow path 33 and is led from the fourth water pipe P4 to the place to be air-conditioned.
  • the refrigeration cycle R2 of the second system is configured in exactly the same manner, and in particular, a refrigerant pipe communicating the second receiver 10b and the four-way valve 18 is provided in the second refrigerant flow path 41 in the first water heat exchanger 11. Connected. That is, in the first water heat exchanger 11, the first refrigerant flow path 40 and the second refrigerant flow path 41 are alternately provided on both sides of one water flow path 33, and one water heat exchanger 11 11 is shared by the first and second two refrigeration cycles R1 and R2 and connected in parallel.
  • the second water heat exchanger 12 also has a first refrigerant flow path 40 communicating with the third receiver 10c on both sides of one water flow path 33 and a second refrigerant flow communicating with the fourth receiver 10d.
  • the paths 41 are alternately provided, and the third and fourth two refrigeration cycles R3 and R4 share one hydrothermal exchanger 12 and are connected in parallel.
  • the machine room 2 is provided with the water circulation pump 13, the first water heat exchanger 11 and the second water heat exchanger 12, and the first to fourth water pipes P1 to P4 are The water circulation pump 13, the first water heat exchanger 11, and the second water heat exchanger 12 are connected in series.
  • the first refrigeration cycle R1 and the second refrigeration cycle R2 constitute the first refrigeration cycle unit 1RA.
  • the third refrigeration cycle R3 and the fourth refrigeration cycle R4 The second refrigeration cycle unit 2RB is configured.
  • this chilling unit Y in order to obtain cold water in order to perform a cooling action, it will be described below.
  • the compressors 17 of the first to fourth refrigeration cycles R1 to R4 are driven all at once to compress the refrigerant, high-temperature and high-pressure refrigerant gas is discharged.
  • the refrigerant gas is guided from the four-way valve 18 to the pair of air heat exchangers 3 and exchanges heat with the air blown by driving the blower S.
  • the refrigerant gas condenses and is led to the expansion valve 19 and adiabatically expands.
  • the liquid refrigerant merges and temporarily accumulates in each of the receivers 10a to 10d, and then is guided to the first refrigerant flow path 40 and the second refrigerant flow path 41 in the first hydrothermal exchanger 11, and the water flow Heat exchange with water led to the passage 33 is performed.
  • the refrigerant in the refrigerant channels 40 and 41 evaporates and takes latent heat of evaporation from the water in the water channel 33, and the water in the water channel 33 is cooled and converted to cold water.
  • the first and second refrigerant flow paths 40 and 41 communicating with the first and second refrigeration cycles R1 and R2 are provided to efficiently cool the water.
  • the water sent from the water circulation pump 13 is, for example, 12 ° C.
  • it is cooled by 2.5 ° C. by the refrigerant guided to the refrigerant flow paths 40, 41 of the two refrigeration cycles R1, R2 in the first water heat exchanger 11.
  • the temperature drops to 9.5 ° C.
  • the cold water whose temperature has decreased is led to the second water heat exchanger 12 via the first water pipe P1, and the first and second refrigeration cycles R3 and R4, which are also two systems here, communicate with each other.
  • the heat exchange with the second refrigerant channels 40 and 41 is performed.
  • the water introduced at 9.5 ° C. is derived as cold water that is further cooled by 2.5 ° C. and lowered in temperature to 7 ° C. in the second hydrothermal exchanger 12.
  • This cold water is led to a place to be air-conditioned through the second water pipe P2 which is a lead-out pipe, and cools the air led by the indoor fan to perform a cooling action.
  • each of the water heat exchangers 11 and 12 is guided to the gas-liquid separator 20 via the four-way valve 18 and separated from the gas and liquid, and then sucked into the compressor 17 and compressed again to be compressed as described above. repeat.
  • the temperature of the chilled water is lowered in two stages, and thus more effective cooling performance. Can be obtained.
  • the first water heat exchanger 11 is connected to the first refrigeration cycle R1 and the second refrigeration cycle R2, which are two systems, so that one compressor 17 is mounted on each refrigeration cycle R1, R2. It becomes possible to do.
  • the second water heat exchanger 12 is also connected to the third refrigeration cycle R3 and the fourth refrigeration cycle R4, which are two systems, so that one compressor 17 is installed in each of the refrigeration cycles R3 and R4. It becomes possible to do.
  • first refrigerant flow path 40 and the second refrigerant flow path 41 communicating with the two refrigeration cycles are provided in the first water heat exchanger 11 and the second water heat exchanger 12, Efficiently warm water. Since the first water heat exchanger 11 and the second water heat exchanger 12 communicate with each other in series, the temperature of the hot water rises over two stages to improve the heating performance.
  • the liquid refrigerant derived from the first water heat exchanger 11 is led to the first receiver 10a and the expansion valve 19, and after adiabatic expansion, is led to the air heat exchangers 3 and 3 to evaporate.
  • the evaporated refrigerant is sucked into the compressor 17 through the four-way valve 18 and the gas-liquid separator 20, and is compressed again to repeat the above-described refrigeration cycle. In other refrigeration cycles, it circulates in the same route.
  • the refrigerant evaporates in the pair of air heat exchangers 3 and 3 constituting the heat exchanger module M, condenses moisture in the air, and drain water adheres.
  • the attached drain water is frozen and easily becomes frost.
  • the sensor detects this frost formation and sends a signal to the control electronic component in the control box 8.
  • the control electronic component issues an instruction to switch the refrigeration cycle including the air heat exchangers 3 and 3 whose frost formation is detected by the sensor from the heating operation to the cooling operation.
  • the refrigeration cycle including the air heat exchangers 3 and 3 that are not detected by the sensor continues the heating operation as it is.
  • the four-way valve 18 is switched, and the refrigerant is guided from the compressor 17 to the air heat exchangers 3 and 3 through the four-way valve 18 and condensed to be converted into liquid refrigerant. Condensation heat is released as the refrigerant condenses, and the frost adhering to it is melted.
  • the shielding plates 15 and 15 are provided on both sides of each heat exchanger module M, air does not escape from between the air heat exchangers 3 and 3 facing each other, and air from the adjacent heat exchanger module M is also present. To prevent intrusion. Therefore, the air heat exchangers 3 and 3 during the defrosting operation and the air heat exchangers 3 and 3 that continue the heating operation do not affect each other.
  • the refrigerant evaporates in the first refrigerant flow path 40 in the first water heat exchanger 11, and the hot water led to the water flow path 33 is cooled.
  • the second refrigerant flow path 41 in the first water heat exchanger 11 communicates with the second refrigeration cycle R2 that continues the heating operation, and the refrigerant condenses and condenses heat into the hot water in the water flow path W. Released.
  • the temperature drop of the hot water in the state derived from the first water heat exchanger 11 is kept in a very small range. After all, if the defrosting operation is switched only for one set of refrigeration cycles, the temperature drop of the hot water supplied from the first water heat exchanger 11 is only slight. Further, since all the compressors 17 and the water circulation pump 13 are variable in capacity, efficient operation is possible according to the heating load.
  • control box 8 the plurality of refrigeration cycle units 1 RA and 2 RB, the water circulation pump 13, the refrigerant pipe and the water pipe are housed in the machine room 2.
  • the side plate 2a and the end plate 2b are placed inside. That is, as shown in FIG. 1, in the completed chilling unit Y, there is no member exposed from the housing F.
  • a control box 8 In the chilling unit Y, a control box 8, a second refrigeration cycle unit 2RB, a first refrigeration cycle unit 1RA, and a water circulation pump 13 are arranged in this order from the front N front side to the back side of the housing F. At the end on the front N side where the control box 8 is provided, a passage T (or a space) where the chilling unit Y is arranged is provided.
  • the first system refrigeration cycle R1 and the second system refrigeration cycle R2 share the first water heat exchanger 11, and constitute a first refrigeration cycle unit 1RA.
  • the refrigeration cycle R3 of the third system and the refrigeration cycle R4 of the fourth system share the second water heat exchanger 12, and constitute a second refrigeration cycle unit 2RB.
  • Each of the first refrigeration cycle unit 1RA and the second refrigeration cycle unit 2RB accommodated in the machine room 2 includes two compressors 17, two four-way valves 18, and two (actually four). ) Expansion valve 19, two gas-liquid separators 20, and one hydrothermal exchanger 11 or 12, each of which has two refrigeration cycles R 1, one hydrothermal exchanger. R2 or R3 and R4 are connected in parallel. Since the first refrigeration cycle unit 1RA and the second refrigeration cycle unit 2RB are each placed on the second drain pan 7b and the refrigeration cycle is unitized, it is easy to assemble these components. .
  • first water heat exchanger 11 in the first refrigeration cycle unit 1RA and the second water heat exchanger 12 in the second refrigeration cycle unit 2RB are connected in series with each other, cold water or Hot water will be generated, and the overall thermal efficiency of the refrigeration cycle will be improved.
  • One heat exchanger module M includes two air heat exchangers 3 and 3 facing each other.
  • the first refrigeration cycle unit 1RA and the second refrigeration cycle unit 2RB each include two heat exchanger modules M, two in total. And each heat exchanger module M is mounted on the 1st drain pan 7a provided independently.
  • FIG. 9 shows an example in which the apparatus is composed of a plurality of chilling units Y, which is optimal for preparing for a large-scale building. That is, three rows of chilling units Y directly connected to the four heat exchanger modules M described in FIG. 1 are provided in parallel.
  • the chilling unit Y used here is provided with a plurality of air suction ports 65 at predetermined intervals on the side of the lower frame Fb constituting the housing F, particularly along the longitudinal direction.
  • the chilling unit is installed on a support base for piping a local water pipe (return pipe or forward pipe) in the lower part.
  • the lower frames Fb on both the left and right sides are the lower portions of the chilling units Y in both rows, particularly for the chilling unit Y in the middle row. It is almost in close contact with the frame Fb. However, the opening state of the air suction port 65 provided in each lower frame Fb is maintained as it is.
  • the heat exchange air is smoothly drawn in.
  • chilling units Y facing each other on the other side of the chilling units Y in the left and right rows and the left and right sides of the chilling units Y in the middle row.
  • each blower S With the operation of each blower S, air is sucked from one end surface in the longitudinal direction of the chilling unit Y and from the space U between the chilling units Y facing each other. However, since the space U is originally formed along the longitudinal direction of the chilling unit Y, the amount of air sucked tends to be insufficient.
  • a plurality of air suction ports 65 are provided in the lower frame Fb constituting the casing F of the chilling unit Y.
  • air suction port 65 When the blower S is driven, air is also sucked from the air suction port 65 and guided to the heat exchanger module M along the space U. Therefore, the shortage of the heat exchange air amount with respect to the heat exchanger module M is solved, and the heat exchange efficiency is improved.
  • the maintenance work for the control box can be facilitated, and the workability can be improved.

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PCT/JP2011/053166 2010-02-15 2011-02-15 チリングユニット WO2011099629A1 (ja)

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CN102753895B (zh) 2015-07-15
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JPWO2011099629A1 (ja) 2013-06-17
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