EP3734179B1 - Air conditioning unit and air conditioning system - Google Patents

Air conditioning unit and air conditioning system Download PDF

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Publication number
EP3734179B1
EP3734179B1 EP18896532.1A EP18896532A EP3734179B1 EP 3734179 B1 EP3734179 B1 EP 3734179B1 EP 18896532 A EP18896532 A EP 18896532A EP 3734179 B1 EP3734179 B1 EP 3734179B1
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EP
European Patent Office
Prior art keywords
air
air conditioning
conditioning unit
distance
casing
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP18896532.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3734179A4 (en
EP3734179A1 (en
Inventor
Akiyoshi Yamamoto
Noriyuki Okuda
Motohiko Fukuoka
Masashi Kamada
Hiroshi Fuchikami
Kenshi Tsuji
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Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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Publication date
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Publication of EP3734179A1 publication Critical patent/EP3734179A1/en
Publication of EP3734179A4 publication Critical patent/EP3734179A4/en
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Publication of EP3734179B1 publication Critical patent/EP3734179B1/en
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Classifications

    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0029—Axial fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • 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
    • 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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
    • F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
    • 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
    • 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
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
    • 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
    • F24F13/32—Supports for air-conditioning, air-humidification or ventilation units

Definitions

  • the present invention relates to an air conditioning unit that blows out temperature-controlled air to a front side indoors.
  • Patent Literature 1 JP 2017-146011 A
  • Patent Literature 1 JP 2017-146011 A
  • Patent Literature 1 JP 2017-146011 A
  • Patent Literature 1 JP 2017-146011 A
  • Patent Literature 1 JP 2017-146011 A
  • Patent Literature 1 JP 2017-146011 A
  • Patent Literature 1 JP 2017-146011 A
  • Patent Literature 1 also discloses a configuration in which the four indoor units are arranged.
  • Aim of the present invention is to provide an air conditioning unit which improves the state of the art indicated above. This aim is achieved by the air conditioning unit according to the corresponding appended claims.
  • An air conditioning unit is an air conditioning unit that blows out temperature-controlled air to a front side indoors according to claim 1. Further preferred aspect of the invention are provided by the dependent claims.
  • FIG. 1 is a diagram illustrating a refrigerant pipe system of an air conditioning system 10.
  • the air conditioning system 10 is a separate type air conditioning apparatus with a refrigerant pipe system, and cools and heats inside of a building by performing a vapor compression refrigeration cycle operation.
  • the air conditioning system 10 is mainly installed in a factory in order to partially cool or heat a space inside an open building such as a factory.
  • the air conditioning system 10 includes a heat source unit 11, which is installed outside the factory, a large number of air conditioning units 12A, 12B, ..., which are installed inside the factory, and a liquid-refrigerant connection pipe 13 and a gas-refrigerant connection pipe 14, which connect the heat source unit 11 to the air conditioning units 12A, 12B, ....
  • a refrigerant circuit of the air conditioning system 10 illustrated in FIG. 1 includes the heat source unit 11, the use-side air conditioning units 12A, 12B, ..., and the refrigerant connection pipes 13, 14 which are connected to each other.
  • the air conditioning units 12A, 12B, ... may be placed on a floor surface, suspended from a beam in a ceiling, or supported on a pillar.
  • a remote controller (not illustrated) is connected to each of the air conditioning units 12A, 12B, ... so that a set temperature and an airflow volume can be changed in several stages. Further, the air conditioning units 12A, 12B, ... can be individually turned on and off.
  • a refrigerant is sealed inside the refrigerant circuit illustrated in FIG. 1 .
  • a refrigeration cycle operation in which the refrigerant is compressed, cooled and condensed, decompressed, heated and evaporated, and then compressed again is performed.
  • the heat source unit 11 mainly includes a compressor 20, a four-way switching valve 15, a heat-source-side heat exchanger 30, a heat-source-side expansion valve 41, a liquid-side shutoff valve 17, and a gas-side shutoff valve 18.
  • the compressor 20 is a hermetic compressor which is driven by a compressor motor.
  • the compressor 20 sucks a gas refrigerant in through a suction flow path 27.
  • the four-way switching valve 15 is a mechanism for switching a refrigerant flow direction.
  • the four-way switching valve 15 connects a refrigerant pipe 29 on the discharge side of the compressor 20 and one end of the heat-source-side heat exchanger 30 and connects the suction flow path 27 on the suction side of the compressor 20 and the gas-side shutoff valve 18 (refer to solid lines on the four-way switching valve 15 of FIG. 1 ).
  • the heat-source-side heat exchanger 30 functions as a condenser for the refrigerant compressed by the compressor 20, and a use-side heat exchanger 50 (described later) functions as an evaporator for the refrigerant condensed in the heat-source-side heat exchanger 30.
  • the four-way switching valve 15 connects the refrigerant pipe 29 on the discharge side of the compressor 20 and the gas-side shutoff valve 18 and connects the suction flow path 27 and one end of the heat-source-side heat exchanger 30 (refer to broken lines on the four-way switching valve 15 of FIG. 1 ).
  • the use-side heat exchanger 50 functions as a condenser for the refrigerant compressed by the compressor 20, and the heat-source-side heat exchanger 30 functions as an evaporator for the refrigerant cooled in the use-side heat exchanger 50.
  • the heat-source-side heat exchanger 30 is a heat exchanger which functions as a condenser or an evaporator for the refrigerant.
  • One end of the heat-source-side heat exchanger 30 is connected to the four-way switching valve 15, and the other end thereof is connected to the heat-source-side expansion valve 41.
  • the heat source unit 11 includes a heat-source-side fan 35 for taking outside air into the unit and discharging the air to the outside again.
  • the heat-source-side expansion valve 41 is an expansion mechanism for decompressing the refrigerant.
  • the heat-source-side expansion valve 41 is an electronic expansion valve whose opening degree is adjustable.
  • One end of the heat-source-side expansion valve 41 is connected to the heat-source-side heat exchanger 30, and the other end thereof is connected to the liquid-side shutoff valve 17.
  • the liquid-side shutoff valve 17 is a valve to which the liquid-refrigerant connection pipe 13 is connected.
  • the gas-side shutoff valve 18 is a valve to which the gas-refrigerant connection pipe 14 is connected, and the gas-side shutoff valve 18 is also connected to the four-way switching valve 15.
  • Each of the air conditioning units 12A, 12B, ... is connected to the heat source unit 11 through the refrigerant connection pipes 13, 14. All the air conditioning units 12A, 12B, ... have completely the same outer shape and internal structure.
  • the air conditioning unit 12A will be described as an example with reference to FIGS. 1 to 4 .
  • the air conditioning unit 12A includes a liquid-refrigerant pipe 51, a use-side expansion valve 42, which is a decompressor, the use-side heat exchanger 50, a gas-refrigerant pipe 52, a use-side fan 55, and the like.
  • the use-side expansion valve 42 is an expansion mechanism for decompressing the refrigerant.
  • the use-side expansion valve 42 is an electronic expansion valve whose opening degree is adjustable.
  • One end of the use-side expansion valve 42 is connected to the liquid-refrigerant connection pipe 13 through the liquid-refrigerant pipe 51, and the other end thereof is connected to the use-side heat exchanger 50.
  • the use-side heat exchanger 50 is a heat exchanger which functions as an evaporator or a condenser for the refrigerant.
  • One end of the use-side heat exchanger 50 is connected to the use-side expansion valve 42, and the other end thereof is connected to the gas-refrigerant connection pipe 14 through the gas-refrigerant pipe 52.
  • the air conditioning unit 12A includes the use-side fan 55 for taking indoor air into the unit and supplying the air indoors again, and exchanges heat between the indoor air and the refrigerant flowing through the use-side heat exchanger 50.
  • the refrigerant connection pipes 13, 14 are refrigerant pipes which are constructed on a site where the heat source unit 11 and the air conditioning units 12A, 12B, ... are installed in an installation place inside or outside the factory.
  • the use-side air conditioning units 12A, 12B, ... described above are installed, the use-side air conditioning units 12A, 12B, ... are directly mounted on the floor surface of the factory or a base, suspended from the ceiling beam with extension ducts connected to blow-out ports thereof, or vertically arranged on the pillar.
  • the refrigerant connection pipes 13, 14 are also disposed along the underfloor, the ceiling, or the pillar.
  • the air conditioning system 10 several tens of air conditioning units 12A, 12B, ... can be connected to the heat source unit 11, and the maximum length of the refrigerant connection pipes 13, 14 is 150 m.
  • the four-way switching valve 15 is in the state indicated by the solid lines in FIG. 1 , that is, the state in which the gas refrigerant discharged from the compressor 20 flows to the heat-source-side heat exchanger 30, and the suction flow path 27 is connected to the gas-side shutoff valve 18.
  • the heat-source-side expansion valve 41 is in a fully open state, and the opening degree of the use-side expansion valve 42 is adjusted.
  • the shutoff valves 17, 18 are in an open state.
  • a high-pressure gas refrigerant discharged from the compressor 20 is fed to the heat-source-side heat exchanger 30, which functions as a condenser for the refrigerant, through the four-way switching valve 15, and cooled by heat exchange with outside air supplied by the heat-source-side fan 35.
  • the high-pressure refrigerant cooled and liquefied in the heat-source-side heat exchanger 30 is fed to each of the air conditioning units 12A, 12B, ... through the liquid-refrigerant connection pipe 13.
  • the opening degree of the use-side expansion valve 42 of each stopped air conditioning unit is set to a stop opening degree.
  • the refrigerant hardly passes through the inside of each air conditioning unit whose operation is at a stop, and the cooling operation is performed only in each air conditioning unit in operation.
  • the four-way switching valve 15 is in the state indicated by the broken lines in FIG. 1 , that is, the state in which the refrigerant pipe 29 on the discharge side of the compressor 20 is connected to the gas-side shutoff valve 18, and the suction flow path 27 is connected to the heat-source-side heat exchanger 30.
  • the opening degrees of the heat-source-side expansion valve 41 and the use-side expansion valve 42 are adjusted.
  • the shutoff valves 17, 18 are in an open state.
  • a high-pressure gas refrigerant discharged from the compressor 20 is fed to each of the air conditioning units 12A, 12B, ... through the four-way switching valve 15 and the gas-refrigerant connection pipe 14. Then, the high-pressure refrigerant fed to each of the air conditioning units 12A, 12B, ... is cooled by heat exchange with indoor air in the use-side heat exchanger 50, which functions as a condenser for the refrigerant, then passes through the use-side expansion valve 42, and is fed to the heat source unit 11 through the liquid-refrigerant connection pipe 13. When the refrigerant is cooled by heat exchange with indoor air, the indoor air is heated.
  • the high-pressure refrigerant fed to the heat source unit 11 becomes a low-pressure refrigerant in a gas-liquid two-phase state by being decompressed by the heat-source-side expansion valve 41, and flows into the heat-source-side heat exchanger 30, which functions as an evaporator for the refrigerant.
  • the low-pressure refrigerant in a gas-liquid two-phase state flowing into the heat-source-side heat exchanger 30 is heated by heat exchange with outside air supplied by the heat-source-side fan 35, and evaporates and becomes a low-pressure refrigerant.
  • the low-pressure gas refrigerant flowing out of the heat-source-side heat exchanger 30 is sucked into the compressor 20 again through the four-way switching valve 15. Heating inside the factory (indoor) is performed in this manner.
  • the air conditioning unit 12A will be described as an example.
  • the air conditioning unit 12A is a unit which blows out temperature-controlled air to the front side indoors.
  • the air conditioning unit 12A includes first and second air passage forming members 71, 72, a drain pan 59, and a casing 60, and the like, in addition to the liquid-refrigerant pipe 51, the use-side expansion valve 42, which serves as a decompressor, the use-side heat exchanger 50, the gas-refrigerant pipe 52, and the use-side fan 55.
  • FIG. 2 is a diagram illustrating part of the internal structure of the air conditioning unit 12A viewed from obliquely behind. In FIG.
  • an electric component box, the use-side expansion valve 42, and a large part of each of the liquid-refrigerant pipe 51 and the gas-refrigerant pipe 52 are not illustrated in order to make other parts of the internal structure easier to see.
  • a part of the first air passage forming member 71 which is the part covering the periphery of a fan blade 55b, is also not illustrated, and only a part of a front-side part of the first air passage forming member 71 is illustrated.
  • the use-side heat exchanger 50 is disposed on the back side inside the casing 60.
  • the right side corresponds to the front side
  • the left side corresponds to the back side.
  • the use-side fan 55 is located in front of the use-side heat exchanger 50.
  • the use-side fan 55 includes a motor 55a, which has a shaft extending front and back, and the fan blade 55b, which is located in front of the motor 55a.
  • the fan blade 55b rotates, air is sucked in through an opening on the back face of the casing 60, and the air flows from the back side to the front side of the use-side heat exchanger 50.
  • the air passing through the use-side heat exchanger 50 passes through a blow-out port 66, which is located on the front side of the use-side fan 55, and is blown out to the front side of the casing 60.
  • Each of the first and second air passage forming members 71, 72 is a cylindrical member.
  • the first air passage forming member 71 is located inside the casing 60, and covers the periphery of the fan blade 55b.
  • the second air passage forming member 72 is located outside the casing 60, and guides air blown out through the blow-out port 66 to the front.
  • the second air passage forming member 72 is disposed on the air-flow downstream side of the use-side fan 55.
  • the first air passage forming member 71 and the second air passage forming member 72 have the same inner diameter ID.
  • the first and second air passage forming members 71, 72 form an air passage FS1 having a cylindrical shape on the front side of the fan blade 55b.
  • a diameter D of the air passage FS1 is equal to the inner diameter ID of the first and second air passage forming members 71, 72 (refer to FIG. 3 ).
  • the diameter of the cross section of the second air passage forming member 72 which is located on the air-flow downstream side relative to the fan blade 55b, is constant.
  • a structure in which the diameter of the cross section of the second air passage forming member 72 decreases toward the tip thereof may be employed.
  • the diameter of the cross section of the tip part of the air passage FS1 becomes small, it becomes difficult to satisfy a condition of the ratio to a height dimension H of the casing 60 (described later).
  • the drain pan 59 is disposed in the lower part inside the casing 60.
  • the drain pan 59 is located under the use-side heat exchanger 50, the liquid-refrigerant pipe 51, the gas-refrigerant pipe 52, the use-side fan 55, and the first air passage forming member 71 and the like, and receives condensed dew generated inside the casing 60.
  • the drain pan 59 can receive the condensed dew.
  • the casing 60 having a rectangular box-like shape mainly includes a top plate 61, a bottom plate 62, a left-side plate 63, a right-side plate 64, and a front plate 65. No steel plate is present on the back face of the casing 60 so that the back face of the use-side heat exchanger 50 is exposed.
  • the blow-out port 66 having a circular shape is formed on the center of the front plate 65. A plurality of straightening plates are disposed on the blow-out port 66. Further, the diameter of the blow-out port 66 is equal to the inner diameter ID of the first and second air passage forming members 71, 72 described above.
  • the casing 60 has a rectangular shape in front view.
  • a first side S61 which is the upper side of the rectangular casing 60
  • a second side S62 which is the lower side of the rectangular casing 60
  • a third side S63 which is the left side of the rectangular casing 60
  • a fourth side S64 which is the right side of the rectangular casing 60
  • the first side S61 and the second side S62 are parallel to each other.
  • the third side S63 and the fourth side S64 are parallel to each other.
  • the height dimension H which is the distance between the first side S61 and the second side S62 (first distance) and a width dimension W, which is the distance between the third side S63 and the fourth side S64 (second distance) are compared
  • the height dimension H is smaller than the width dimension W in the air conditioning unit 12A.
  • the height dimension H is 455 mm
  • the width dimension W is 555 mm.
  • the smaller one of the height dimension H and the width dimension W of the rectangular shape in front view of the casing 60 that is, the height dimension H is reduced to equal to or smaller than 2.5 times the diameter D of the air passage FS1 described above.
  • Such design of the casing 60 makes it possible to obtain an effect relating to a blow distance of blown-out air when the two air conditioning units 12A, 12B are arranged as described later.
  • the smaller one of the height dimension H and the width dimension W of the casing 60 is more preferably reduced to equal to or smaller than 2 times the diameter of the air passage FS1 by devising the arrangement of the components inside the casing 60.
  • the diameter D of the air passage FS1 that is, the inner diameter ID of the first and second air passage forming members 71, 72 is 320 mm.
  • the height dimension H (455 mm) of the casing 60 falls within a dimension equal to or smaller than 1.5 times the diameter (320 mm) of the air passage FS 1.
  • the ratio of the height dimension H of the casing 60 to the diameter D of the air passage FS 1 is an extremely small value which is smaller than ever before.
  • FIGS. 5 and 6 illustrate a state in which the two air conditioning units 12A, 12B are arranged in a vertical direction D1.
  • the air conditioning unit 12A and the air conditioning unit 12B have completely the same structure.
  • the air conditioning unit 12A is disposed directly above the air conditioning unit 12B.
  • a clearance having a height of 85 mm is left between the air conditioning unit 12A and the air conditioning unit 12B.
  • a support member 81 is disposed in the clearance.
  • Each support member 81 supports the first air conditioning unit 12A or the second air conditioning unit 12B.
  • One end of the support member 81 is fixed to a pillar 80.
  • a height dimension L1 of the support member 81 is 80 mm.
  • the support member 81 is selected such that a relationship of the height dimension L1 of the support member 81 ⁇ (the diameter of the air passage FS1) ⁇ 0.5 is satisfied between the height dimension L1 (80 mm) of the support member 81 and the diameter (320 mm) of the air passage FS1 of each of the air conditioning units 12A, 12B.
  • two support members 81 are disposed for each of the air conditioning units 12A, 12B, and the height dimension L1 of the support member 81 is 80 mm due to enough strength.
  • a center C1 of the first air passage FS1, which is the air passage of the first air conditioning unit 12A, and a center C2 of a second air passage FS2, which is the air passage of the second air conditioning unit 12B, are separated from each other by a third distance L3 in the vertical direction D1.
  • the third distance L3 is equal to or smaller than 2.5 times the diameter (320 mm) of the cross section of each of the air passages FS1, FS2.
  • the effect relating to the blow distance of blown-out air can be obtained by reducing the ratio of the third distance L3 to the diameter D of the cross section of each of the air passages FS 1, FS2.
  • the two air conditioning units 12A, 12B were vertically stacked, that is, the two air conditioning units 12A, 12B were arranged with no clearance therebetween, and the air velocity was measured at 1120 points using an air velocity measurement device.
  • the number of revolutions of the fan is 1646 per minute, and the airflow volume is approximately 18 m 3 per minute. Further, a similar air velocity measurement was performed using only single air conditioning unit 12A.
  • FIG. 10 illustrates an analysis result in a case where the two air conditioning units 12A, 12B which are largely separated from each other with a clearance dimension of 2 m are operated.
  • the clearance dimension is 2 m
  • the third distance L3, which is the distance between the center C1 of the first air passage FS1 and the center C2 of the second air passage FS2 is 2455 mm
  • a value obtained by dividing the third distance L3 by the diameter (320 mm) of the air passages FS1, FS2 is 7.7.
  • an area having an air velocity of 1 m/s or higher is limited up to a point 4 m away from each of the air conditioning units 12A, 12B.
  • air having an air velocity of 1 m/s reaches the point 4 m away from each of the air conditioning units 12A, 12B, but air in an area farther than the point has an air velocity lower than 1 m/s.
  • the distance of 4 m is referred to as the blow distance of blown-out air having an air velocity of 1 m/s.
  • FIG. 11 illustrates an analysis result in a case where the two air conditioning units 12A, 12B which are closely disposed with a clearance dimension of 500 mm are operated.
  • the third distance L3, which is the distance between the center C1 of the first air passage FS1 and the center C2 of the second air passage FS2 is 955 mm
  • a value obtained by dividing the third distance L3 by the diameter (320 mm) of the air passages FS1, FS2 is 3.0.
  • the blow distance of blown-out air having an air velocity of 1 m/s extends to 6.7 m.
  • FIG. 12 illustrates an analysis result in a case where the two air conditioning units 12A, 12B which are adjacently disposed with a clearance dimension of 0 mm are operated.
  • the third distance L3, which is the distance between the center C1 of the first air passage FS1 and the center C2 of the second air passage FS2 is 455 mm
  • a value obtained by dividing the third distance L3 by the diameter (320 mm) of the air passages is 1.4.
  • the blow distance of blown-out air having an air velocity of 1 m/s extends to 7.3 m.
  • FIG. 13 a graph of FIG. 13 relating to the blow distance of blown-out air having an air velocity of 1 m/s was obtained.
  • the arrangement in which the two air conditioning units 12A, 12B are not largely separated from each other so as to reduce as small as possible the value obtained by dividing the third distance L3 by the diameter D of the air passages FS1, FS2 results in the extension of the blow distance of blown-out air having an air velocity of 1 m/s.
  • FIG. 13 the arrangement in which the two air conditioning units 12A, 12B are not largely separated from each other so as to reduce as small as possible the value obtained by dividing the third distance L3 by the diameter D of the air passages FS1, FS2 results in the extension of the blow distance of blown-out air having an air velocity of 1 m/s.
  • the air conditioning unit 12A is designed such that the ratio of the smaller one of the height dimension H and the width dimension W of the casing 60 in front view (in the present embodiment, the height dimension H) to the diameter D of the cross section of the air passage FS1 is smaller than a conventional ratio. Specifically, the height dimension H is reduced to a short dimension equal to or smaller than 2.5 times the diameter D of the cross section of the air passage FS1.
  • the two air conditioning units 12A, 12B are arranged in the vertical direction D1
  • the distance in front view between the first air passage FS1 of the first air conditioning unit 12A and the second air passage FS2 of the second air conditioning unit 12B which are adjacent to each other is reduced (refer to FIG. 6 ). Accordingly, air blown out through the air passage FS1 and air blown out through the air passage FS2 both play a role for reducing air flow resistance each other, and can reach far (refer to FIG. 12 ).
  • the casing 60 having the height dimension H smaller than the width dimension W is used, and the thin drain pan 59 is disposed in the lower part inside the casing 60 as illustrated in FIG. 2 .
  • the use-side fan 55 and the inner diameter ID of the first and second air passage forming members 71, 72 are designed to be large to the extent possible, and the arrangement of the use-side heat exchanger 50 and the electric component box is devised such that the diameter D of the cross section of the air passage FS1 becomes large to the extent possible with respect to the height dimension H of the casing 60.
  • the air conditioning unit 12A provided with the drain pan 59 can obtain the effect of sufficiently extending the blow distance of blown-out air having an air velocity of 1 m/s described above.
  • the two air conditioning units 12A, 12B are arranged in the vertical direction D1 with a possibly small clearance therebetween. That is, the air conditioning system 10 employs the structure in which the two air conditioning units 12A, 12B are not largely separated from each other with the arrangement space for the support member 81 secured. Specifically, the two air conditioning units 12A, 12B are vertically arranged with a clearance having a height of 85 mm therebetween.
  • the third distance L3 which is the distance between the center C1 of the first air passage FS1 of the first air conditioning unit 12A and the center C2 of the second air passage FS2 of the second air conditioning unit 12B, is equal to or smaller than 2.5 times the diameter D (320 mm) of the cross section of each of the air passages FS1, FS2.
  • the air conditioning system 10 can extend the blow distance of blown-out air having an air velocity of 1 m/s to 7 m or more.
  • FIGS. 5 and 6 illustrate the example in which the two air conditioning units 12A, 12B are arranged in the vertical direction D1.
  • three or more air conditioning units 12A, 12B, ... may be arranged.
  • FIG. 14 when four air conditioning units 12A, 12B, ... are vertically closely arranged, the blow distance of blown-out air having an air velocity of 1 m/s is further extended.
  • the air conditioning units 12A, 12B ... each having the height dimension H smaller than the width dimension W are vertically arranged.
  • the relationship between the height dimension H and the width dimension W may be reversed.
  • the height dimension of each air conditioning unit may be set larger than the width dimension thereof, and a plurality of air conditioning units may be arranged in the right-left direction.
  • blown-out air can be caused to reach far by satisfying a relationship of the width dimension of the casing ⁇ (the diameter of the air passage) ⁇ 2.5, and reducing the distance between the air passages of the air conditioning units arranged right and left.
  • Patent Literature 1 JP 2017-146011 A

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Central Air Conditioning (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
  • Air-Flow Control Members (AREA)
EP18896532.1A 2017-12-25 2018-12-21 Air conditioning unit and air conditioning system Active EP3734179B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017247365A JP6789205B2 (ja) 2017-12-25 2017-12-25 空調ユニットおよび空調システム
PCT/JP2018/047254 WO2019131513A1 (ja) 2017-12-25 2018-12-21 空調ユニットおよび空調システム

Publications (3)

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EP3734179A1 EP3734179A1 (en) 2020-11-04
EP3734179A4 EP3734179A4 (en) 2021-02-24
EP3734179B1 true EP3734179B1 (en) 2022-11-16

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EP (1) EP3734179B1 (ja)
JP (1) JP6789205B2 (ja)
CN (1) CN111512095B (ja)
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WO (1) WO2019131513A1 (ja)

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JP7497184B2 (ja) 2020-03-25 2024-06-10 日本キヤリア株式会社 空気調和機の室内ユニット
CN117006692B (zh) * 2023-10-07 2023-12-26 东南大学建筑设计研究院有限公司 一种暖通空调固定结构

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US2593702A (en) * 1948-04-13 1952-04-22 Claude B Schneible Gaseous curtain for ventilating exhaust
JPS62134448A (ja) * 1985-12-09 1987-06-17 Matsushita Electric Ind Co Ltd 空気調和機の吹出装置
JP2000081225A (ja) * 1998-09-04 2000-03-21 Daikin Ind Ltd 空気調和機の吹出口構造
CN100561066C (zh) * 2005-12-13 2009-11-18 广东科龙电器股份有限公司 分体空调器的小型化室外机
JP2007255848A (ja) * 2006-03-24 2007-10-04 Daikin Ind Ltd 空気調和機及びこれを用いた空気調和システム
US20110284185A1 (en) * 2010-11-19 2011-11-24 Fredrick Thomas Cullen Thermal fluid temperature converter
JP2011080759A (ja) * 2010-12-20 2011-04-21 Nisshin Toa Inc 送風装置
JP5855895B2 (ja) * 2011-10-17 2016-02-09 富士古河Ｅ＆Ｃ株式会社 通信・情報処理機器室等の空調システム
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KR20140037985A (ko) * 2012-09-12 2014-03-28 삼성전자주식회사 공기조화기의 실내기
KR102076668B1 (ko) * 2013-05-24 2020-02-12 엘지전자 주식회사 공기 조화기의 실내기
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KR102230506B1 (ko) * 2016-02-17 2021-03-19 도시바 캐리어 가부시키가이샤 공조용 실내 유닛 및 공기 조화 장치
JP6664985B2 (ja) * 2016-02-17 2020-03-13 東芝キヤリア株式会社 空気調和装置
KR102479811B1 (ko) * 2016-06-13 2022-12-23 삼성전자주식회사 공기 조화기 및 공기 조화기의 제어방법

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CN111512095A (zh) 2020-08-07
CN111512095B (zh) 2021-08-03
JP6789205B2 (ja) 2020-11-25
WO2019131513A1 (ja) 2019-07-04
EP3734179A4 (en) 2021-02-24
US20200363076A1 (en) 2020-11-19
ES2933523T3 (es) 2023-02-09
EP3734179A1 (en) 2020-11-04

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