EP2716984B1 - Outdoor unit for air conditioner - Google Patents

Outdoor unit for air conditioner Download PDF

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Publication number
EP2716984B1
EP2716984B1 EP12793412.3A EP12793412A EP2716984B1 EP 2716984 B1 EP2716984 B1 EP 2716984B1 EP 12793412 A EP12793412 A EP 12793412A EP 2716984 B1 EP2716984 B1 EP 2716984B1
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EP
European Patent Office
Prior art keywords
outdoor
air
unit
guide structure
humidifying
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
EP12793412.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2716984A4 (en
EP2716984A1 (en
Inventor
Akiko Shirai
Takahiro Okamoto
Tomoyuki Haikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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Filing date
Publication date
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Publication of EP2716984A1 publication Critical patent/EP2716984A1/en
Publication of EP2716984A4 publication Critical patent/EP2716984A4/en
Application granted granted Critical
Publication of EP2716984B1 publication Critical patent/EP2716984B1/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
    • F24F1/06—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
    • F24F1/54—Inlet and outlet arranged on opposite sides
    • 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
    • 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
    • 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
    • F24F3/12—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 treatment of the air otherwise than by heating and cooling
    • F24F3/14—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 treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—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 treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F24F6/06—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using moving unheated wet elements
    • 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
    • F24F1/58—Separate protective covers for outdoor units, e.g. solar guards, snow shields or camouflage

Definitions

  • the present invention relates to an outdoor unit for an air conditioner having a humidifying unit.
  • a type of air conditioner in which an outdoor unit and a humidifying unit (or a humidifying device) are integrated is known among conventional air conditioners having a humidifying function.
  • the outdoor unit is partitioned into upper and lower portions by a partition plate as described in, for example, Patent Literature 1 (Japanese Laid-Open Patent Application 2004-353898 ) and Patent Literature 2 (Japanese Laid-Open Patent Application 2008-241212 ).
  • the humidifying unit is disposed above the partition plate, and a heat exchanger and a fan for blowing air into the heat exchanger are disposed below the partition plate in the outdoor unit described in Patent Literature 1 and 2.
  • JP 2002-098373 A discloses an air conditioner comprising a humidifier housed in an outdoor unit, wherein outside air bypassing a machinery chamber of the outdoor unit is directly sucked through a section hole at the upstream of a humidifier rotor in a heat collecting passage, hole at the upstream of a humidifier rotor in a heat collecting passage, the directly sucked outside air flows in the collecting passage and passes through the humidifier rotor to preheat the air, and the preheated air is heated by a heater and flows in a humidifying passage to pass through the humidifier rotor.
  • An object of the present invention is to reduce the size of an outdoor unit while preventing deterioration in humidifying performance in an outdoor unit having a humidifying function.
  • An outdoor unit for an air conditioner according to a preferred embodiment of the present invention the humidifying unit sucks in only the air from the intake port that has been guided through the outdoor fan and along the guide structure.
  • An outdoor unit for an air conditioner according to a preferred embodiment of the present invention the humidifying unit collectively sucks in, at the intake port, air guided along the guide structure via a first route and air guided via a second route that differs from the first route.
  • the casing includes a front plate having an outlet port through which outdoor air is blown by the outdoor fan, and the guide structure is provided to the front plate so as to cover a portion of the outlet port.
  • the casing further includes a grill that is attached to the front plate and that covers the outlet port of the front plate, and the guide structure is formed on the grill.
  • An outdoor unit for an air conditioner further comprises a partitioning member that is provided between the guide structure and the front plate and that partitions a space sandwiched between the guide structure and the front plate, whereby a channel is formed that surrounds a flow of air flowing from the outlet port toward the intake port.
  • air can be effectively fed into the intake port since a flow of air that deviates from the path and does not reach the intake port is eliminated since the flow of air is surrounded by the channel formed by providing the partitioning member.
  • pressure caused by the partitioning member in the flow of air blown by the outdoor fan and turning in the rotating direction of the outdoor fan can be reduced since the partitioning member extends in the rotating direction of the outdoor fan.
  • An outdoor unit for an air conditioner further includes a rectifying member that is provided between the guide structure and the front plate and that extends smoothly from the outlet port toward the intake port.
  • the humidifying unit further includes a moisture absorption duct that is provided above the outdoor fan and that guides outdoor air from the intake port to the moisture absorption section, the moisture absorption duct being curved downward when seen in a side view.
  • outdoor air is easily guided through the moisture absorption duct toward the moisture absorption section due to blowing by the outdoor fan from the lower part toward the top of the outdoor unit.
  • humidifying performance can be improved when guiding air with a higher humidity than air in the first route to the moisture absorption section by using the second route.
  • an outdoor unit having a guide structure can be provided at a low cost.
  • noise can be suppressed by the rectifying member.
  • outdoor air supplied to the moisture absorption section is increased, whereby humidifying performance is improved.
  • An air conditioner 10 is configured by connecting an indoor unit 20 and an outdoor unit 30 with a interconnecting line 12 as shown in FIG 1 .
  • the air conditioner 10 has a plurality of operating modes such as a cooling operation, a warming operation, a dehumidifying operation, a humidifying operation, an air supply operation, and an air exhaust operation.
  • the operating modes may be combined appropriately.
  • a refrigerant circuit shown in FIG. 2 is formed in the air conditioner 10 for allowing the heat exchange and transfer of heat.
  • an indoor heat exchanger 21 is provided in the indoor unit 20 and a compressor 31, a four-way switching valve 32, an outdoor heat exchanger 33, an electric-operated valve 34, a filter 35, an accumulator 36, a liquid closing valve 37, and a gas closing valve 38 are provided in the outdoor unit 30 in FIG. 2 .
  • a liquid refrigerant tube 14 and a gas refrigerant tube 16 for linking the indoor unit 20 and the outdoor unit 30 run through the interconnecting line 12.
  • the air supply operation In the humidifying operation, the air supply operation, and the air exhaust operation, air moves between the indoor unit 20 and the outdoor unit 30 through an air supply duct 18 in the interconnecting line 12 for supplying outdoor air into a room and for exhausting air inside a room.
  • moisture is taken in from outdoor air by the outdoor unit 30, in order for high-humidity air containing abundant moisture to be supplied from the outdoor unit 30 to the indoor unit 20.
  • a humidifying unit 60 having a function of taking in moisture from the outdoor air is provided in the outdoor unit 30.
  • the four-way switching valve 32 is connected as shown by the solid lines, and the refrigerant compressed and discharged by the compressor 31 is fed to the outdoor heat exchanger 33 through the four-way switching valve 32.
  • the refrigerant that loses heat by conducting heat exchange with the outdoor air in the outdoor heat exchanger 33 is fed to the electric-operated valve 34.
  • the refrigerant in a high-pressure liquid state is changed to a low-pressure state by the electric-operated valve 34.
  • the refrigerant expanded by the electric-operated valve 34 passes via the filter 35 through the liquid closing valve 37 and the liquid refrigerant tube 14 and enters the indoor heat exchanger 21.
  • the four-way switching valve 32 is connected as shown by the dashed lines, and the refrigerant compressed and discharged by the compressor 31 is fed to the indoor heat exchanger 21.
  • the refrigerant output from the outdoor heat exchanger 33 follows a route that is in the opposite direction of the route during cooling operation and returns to the compressor 31. Namely, the refrigerant circulates in the order of the compressor 31, the four-way switching valve 32, the gas refrigerant tube 16, the indoor heat exchanger 21, the liquid refrigerant tube 14, the electric-operated valve 34, the outdoor heat exchanger 33, the four-way switching valve 32, the accumulator 36, and the compressor 31.
  • an indoor fan 22 that is driven by a motor is provided in the indoor unit 20 downstream of the indoor heat exchanger 21 as shown in FIG. 2 .
  • the indoor fan 22 is a cross-flow fan. When the indoor fan 22 is driven, indoor air that is sucked in from an inlet port 23 at the upper part of the indoor unit 20 shown in FIG. 1 passes through the indoor heat exchanger 21 and is blown out from an outlet port 24 at the lower part of the indoor unit 20.
  • An air supply port 25 for the air supply duct 18 is provided in the indoor unit 20 in a space on the upstream side of the indoor heat exchanger 21.
  • the air supply duct 18 is connected to the humidifying unit 60 and high-humidity air fed from the humidifying unit 60 is supplied from the air supply port 25 to a space on the upstream side of the indoor heat exchanger 21.
  • the indoor fan 22 is driven in a state in which the high-humidity air is supplied from the air supply port 25 whereby the humidity of conditioned air blown out from the outlet port 24 of the indoor unit 20 can be increased.
  • the humidifying operation and the cooling operation can be conducted at the same time by the indoor unit 20 by using the indoor heat exchanger 21 as an evaporator at the same time as the indoor fan 22 supplies the high-humidity air.
  • the outdoor unit 30 is provided with a casing 40 and a partition plate 43, and an internal space of the casing 40 is divided into a blower chamber 41 and a machine chamber 42 by the partition plate 43 as shown in FIG 2 .
  • the blower chamber 41 and the machine chamber 42 are isolated from each other by the partition plate 43 so that wind from the blower chamber 41 does not flow into the machine chamber 42 in the outdoor unit 30.
  • an outdoor fan 39 that is driven by a fan motor 39a is provided in the outdoor unit 30 on the downstream side of the outdoor heat exchanger 33 as shown in FIG. 2 .
  • the outdoor fan 39 is a propeller fan having a propeller 39b driven by the fan motor 39a.
  • the outdoor fan 39 is driven, outdoor air sucked in from the rear surface side of the outdoor heat exchanger 33 and passes through the outdoor heat exchanger 33 is blown out from an outlet port 44 in the outdoor unit 30.
  • the front surface of the outlet port 44 is covered by a grill 56 as shown in FIG. 1 and is configured so that the propeller 39b of the outdoor fan 39 does not come into contact with any objects outside of the outdoor unit 30.
  • the grill 56 is attached to a front plate 46 of the casing 40.
  • the humidifying unit 60 is provided in the blower chamber 41 of the outdoor unit 30 and the humidifying unit 60 is disposed in front of the outdoor heat exchanger 33.
  • the reason for disposing the humidifying unit 60 in front of the outdoor heat exchanger 33 is to allow a portion of the humidifying unit 60 to be in a blowing route that passes through the outdoor heat exchanger 33.
  • the humidifying unit 60 in the abovementioned location is provided with a shape and mounting position as described below in order to suppress an increase in wind resistance in the blowing route that passes through the outdoor heat exchanger 33.
  • FIG. 3 is a perspective view of the outdoor unit 30 and shows a state in which the grill 56 and the like are removed from the outdoor unit 30 of FIG. 1 .
  • FIG. 4 is a plan view of the outdoor unit 30 and shows a state in which a top plate 48 is removed from the outdoor unit 30.
  • FIG. 5 is a perspective view of the outdoor unit 30 and shows a state in which the front plate 46, the top plate 48, and a left side plate 50 and the like are removed.
  • FIG. 6 is a cross-sectional view along lines I-I in FIG. 1 .
  • the casing 40 of the outdoor unit 30 includes the front plate 46, a right side plate 47, the top plate 48, and a bottom plate 49 as shown in FIG. 3 .
  • the outdoor heat exchanger 33 has an L-shape as seen from above as shown in FIG. 4 , and the left side plate 50 is attached to the left side surface of the casing 40 facing a left side face part 332 of the L-shaped outdoor heat exchanger 33.
  • the left side plate 50 is formed in a lattice shape in order to guide outdoor air to the outdoor heat exchanger 33.
  • the rear side of the blower chamber 41 is open to a rear face part 331 of the outdoor heat exchanger 33, and a protective metal screen for covering the rear face part 331 of the outdoor heat exchanger 33 is attached at the rear side of the blower chamber 41.
  • the partition plate 43 that partitions the casing 40 into the blower chamber 41 and the machine chamber 42 is mounted roughly parallel to the right side plate 47 as shown in FIG 5 .
  • the partition plate 43 extends from the right edge of the outdoor heat exchanger 33 toward the front and extends vertically from the bottom plate 49 up to the top plate 48.
  • a front section of the partition plate 43 abuts and is attached to the front plate 46.
  • the right side plate 47 covers the entire right side face and the partial rear face, the partial rear face which provides from the right edge to the right side surface of a rear face part 51 of the outdoor heat exchanger 33.
  • An opening part 43b is formed in the partition plate 43 (see FIG 5 ).
  • An electric component box 55 shown in FIG 4 is mounted in the opening part 43b, and a fin for cooling power devices is mounted so as to protrude from the opening part 43b toward the blower chamber 41.
  • the outdoor heat exchanger 33 has the rear face part 331 allocated on the rear side of the casing 40 and the left side face part 332 allocated on the left side of the casing 40 as previously described, and the outdoor heat exchanger 33 has an L-shape as seen from above.
  • the outdoor heat exchanger 33 includes a multitude of fins that are elongated in the height direction, and a heat exchanger tube attached horizontally in a manner of piercing the fins to be thermally connected to the multitude of fins.
  • the height of the outdoor heat exchanger 33 stretches from the bottom plate 49 to the top plate 48.
  • the heat exchanger tube is disposed in a plurality of rows in the height direction by being folded a plurality of times at either edge of the outdoor heat exchanger 33.
  • the heat exchanger tube is disposed so that a refrigerant with a high temperature enters the heat exchanger tube from the bottom-most row in the outdoor heat exchanger 33 and the temperature of the refrigerant drops as the refrigerant flows upward.
  • a refrigerant with a low temperature enters the heat exchanger tube from the uppermost row and the temperature of the refrigerant rises as the refrigerant flows downward.
  • FIG. 7 is a perspective view of the humidifying unit 60 as the humidifying unit being seen from the front right diagonally and from above, the humidifying unit 60 being removed.
  • FIG. 8 is a perspective view of the humidifying unit 60 as seen from the rear right diagonally and from above.
  • FIGS. 7 and 8 show a state in which an upper part cover 67 shown in FIGS. 4 and 5 is removed.
  • the fact that the humidifying unit 60 is mounted in an uncovered manner in front of the outdoor heat exchanger 33 is a characteristic of the outdoor heat exchanger 33.
  • the height of a position of an upper surface 60a of the humidifying unit 60 matches the height of the upper edge 33b (top part) of the outdoor heat exchanger 33.
  • the humidifying unit 60 is provided with a shape in which the volume is reduced as much as possible while keeping a relatively complicated external appearance.
  • the grill 56 shown in FIG. 1 is attached to a front plate 46 of the casing 40 and covers the outlet port 44.
  • a multitude of opening parts 56a shown in FIG. 9 are formed in the grill 56 whereby outdoor air is blown out.
  • a guide structure 56b is formed of a resin plate at the upper left part of the grill 56. Specifically, intervals between crosspieces 56d are blocked in an area Ar1 due to the formation of the plate-like guide structure 56b.
  • the guide structure 56b is formed by avoiding the formation of the opening parts 56a in a portion that becomes the guide structure 56b when forming the grill 56.
  • a metal mold is made so that, for example, a region that corresponds to the guide structure 56b is blocked.
  • a step for separately forming the guide structure 56b can be omitted when manufacturing the grill 56 in this way.
  • the guide structure 56b is formed outside of the casing 40 whereby the casing 40 may be made in a compact manner.
  • the guide structure 56b is formed so as to cover a portion of the outlet port 44 when seen from the front as shown in FIG. 16 , and shields a portion of the outdoor air being blown from the outlet port 44 toward the front.
  • the shielded outdoor air is guided upward along the guide structure 56b on a route r1 shown by the chain double-dashed line in FIG. 9 .
  • the outdoor air guided upward along the guide structure 56b enters the intake port 68a open solely since the upper part of the grill 56 is blocked. That is, when looking at the outdoor unit 30 from the front as shown in FIG.
  • an overlapping portion 56b1 in which the upper edge and the left and right edges of the guide structure 56b overlaps the front plate 46 becomes a pathway, and outdoor air is guided from an overlapping portion 56b2 in which the guide structure 56b overlaps the outlet port 44 toward the above overlapping portion 56b1 and then enters the intake port 68a.
  • the humidifying unit 60 has a moisture absorption section 61 for absorbing moisture from the outdoor air, and a moisture desorption section 62 for desorbing moisture thereby humidifying the air.
  • the moisture absorption section 61 and the moisture desorption section 62 in the humidifying unit 60 are configured as a single disc-shaped humidifying rotor 63 as shown in FIG. 10 . That is, the humidifying rotor 63 is a moisture absorption and desorption member that serves as both the moisture absorption section 61 and the moisture desorption section 62.
  • the disc-shaped humidifying rotor 63 is a zeolite rotor having a honeycomb structure formed by the calcination of zeolite and the like.
  • the humidifying rotor 63 is arranged so as to rotate around the center of the disc as a rotating shaft, and is rotated by motive power from a rotor driving motor (not shown) transmitted to gears 64 provided on the periphery of the humidifying rotor 63.
  • An adsorbent such as zeolite that forms the humidifying rotor 63 exhibits the properties of absorbing moisture from the air at normal temperature, for example, and desorbing moisture upon reaching a temperature higher than normal temperature due to air heated to a high temperature by a heater 71. That is, a part of the humidifying rotor 63 exposed to the heated air become the moisture absorption section 61 and the part of the humidifying rotor 63 exposed to the heated air become the moisture desorption section 62.
  • the humidifying rotor 63 absorbs moisture at a part in which the temperature of the humidifying rotor 63 is low, and desorbs moisture at a part in which the temperature of the humidifying rotor 63 is high.
  • the heater 71 is provided above the moisture desorption section 62 in order to heat air forced to pass through the moisture desorption section 62 of the humidifying rotor 63.
  • the entire periphery of the external periphery of the disc-shaped humidifying rotor 63 is enclosed by enclosure walls 65 and 66.
  • the external periphery of the moisture absorption section 61 is covered by the enclosure wall 65 and the external periphery of the moisture desorption section 62 is covered by the enclosure wall 66 in the humidifying unit 60.
  • a moisture absorption duct 68 is provided at an upper part of the moisture absorption section 61 for guiding outdoor air to the moisture absorption section 61.
  • the top of the moisture absorption section 61 that has a sector form with a central angle ⁇ of more than 180 degrees is covered by the moisture absorption duct 68 as shown in FIG. 4 .
  • the moisture absorption duct 68 has an intake port 68a that is open toward the front surface side and that sucks in outdoor air from the front surface side.
  • the moisture absorption duct 68 includes a sloping part 68b that is formed in an upper part of the moisture absorption duct 68 and that continues to the intake port 68a as shown in FIG 6 . Consequently, the moisture absorption duct 68 has a shape that curves downward when seen from the side. Since the moisture absorption duct 68 has a structure that curves downward in this way, outdoor air blown from the lower part toward the upper part is able to easily enter the intake port 68a of the moisture absorption duct 68.
  • the moisture absorption duct 68 widens in a vertical manner progressively from the intake port 68a toward the rear surface side, and the outdoor air that progresses from the intake port 68a toward the rear surface side spreads in a vertical manner while progressing toward the rear surface side and easily traverses the full length of the moisture absorption section 61.
  • the moisture absorption duct 68 covers the entire surface of the moisture absorption section 61 as shown in FIG. 4 and the outdoor air passes through the humidifying rotor 63 disposed below from the upper part to the lower part.
  • a discharge port 69 is below the humidifying rotor 63.
  • the discharge port 69 occupies an area approximately equal to a projection portion from the upper surface of the moisture absorption duct 68.
  • the propeller 39b is disposed below the discharge port 69 as shown in FIG. 6 and FIG. 9 . That is, the discharge port 69 faces a space 70 that has negative pressure when the propeller 39b is rotating.
  • outdoor air that is blown from the bell mouth 52 by the propeller 39b to enter the intake port 68a runs through the route indicated by the chain double-dashed line in FIG. 9 , is drawn toward the negative pressure space 70, and is blown out from the discharge port 69 into the blower chamber 41.
  • outdoor air is fed to the moisture absorption section 61 only by the outdoor fan 39, and thus a dedicated fan that is required in the prior art for feeding the outdoor air to the moisture absorption section 61 can be omitted.
  • the heater 71 is provided above the moisture desorption section 62 of the humidifying rotor 63 for desorbing moisture from the moisture desorption section 62 as shown in FIG 10 .
  • FIG. 11 is a bottom view of the heater 71 and a heater supporting member 74 as seen from below.
  • the heater 71 has a structure in which heating wires (not shown) are provided inside a cylindrical housing, and outdoor air that is sucked in from an intake port 72 and fed to the humidifying rotor 63 is heated by the heating wires. When the heated air passes through the openings of the honeycomb structure of the humidifying rotor 63, air in a humidifying duct 73 is humidified by moisture desorption from the humidifying rotor 63.
  • the heater 71 is attached to a lower side of the heater supporting member 74 as shown in FIG. 11 .
  • the heater supporting member 74 is a cylinder that includes an upper surface part 74a, a peripheral outer wall part 74b, and fixed plates 74c, and an upper surface and side surfaces of the heater supporting member 74 are surrounded by the upper surface part 74a and the outer wall part 74b so that the cylinder has open lower end.
  • the housing of the heater 71 and the heater supporting member 74 are formed by sheet metal for maintaining a required heat resistance.
  • the intake port 72 is formed at the front side face of the heater supporting member 74 and below the humidifying rotor 63, and outdoor air that is sucked in from the intake port 72 and flows through above the humidifying rotor 63 passes through the housing of the heater 71 from the front surface side toward the rear surface side.
  • the outdoor air is heated by the heater 71 at this time.
  • the air that passes through the housing of the heater 71 runs through above the humidifying rotor 63 and progresses to the rear side surface. Since the lower part of the rear side surface of the humidifying rotor 63 is leaded to the humidifying duct 73 (see FIG.
  • the humidifying rotor 63 rotates in a clockwise direction as seen from above, whereby the humidifying rotor 63 functions as the moisture desorption section 62 when the humidifying rotor 63 functioning as the moisture absorption section 61 rotates to arrive below the heater supporting member 74. That is, the humidifying rotor 63 is a moisture absorption and desorption member that serves as both the moisture absorption section 61 and the moisture desorption section 62.
  • the humidifying duct 73 provides wind resistance to outdoor air that passes through the outdoor heat exchanger 33 since the humidifying duct 73 is positioned at the lower rear side of the humidifying rotor 63 and in front of the outdoor heat exchanger 33 as described above.
  • a turbo fan 75 is installed in the machine chamber 42 as shown in FIG. 2 and FIG. 4 because the turbo fan 75 having a relatively large occupied volume may cause wind resistance when disposed in front of the outdoor heat exchanger 33.
  • the propeller 39b Since the propeller 39b is disposed below the humidifying unit 60, the highest position within the area in which the propeller 39b rotates is lower than the upper edge 33b of the outdoor heat exchanger 33 by the size in the highest direction of the humidifying unit 60. As a result, outdoor air that passes through in the vicinity of the upper edge of the outdoor heat exchanger 33 flows downward diagonally toward the propeller 39b.
  • the humidifying duct 73 is mounted diagonally toward the turbo fan 75 so that the edge of the humidifying duct 73 closer to the turbo fan 75 is positioned at the same height as the upper edge 33b of the outdoor heat exchanger 33 in order to prevent as much as possible the humidifying duct 73 hindering the route of the outdoor air described above.
  • a damper 78 is attached to the humidifying duct 73 as shown in FIG. 2 to prevent a reverse flow, that is, the flow of air from the turbo fan 75 side toward the humidifying rotor 63, in the humidifying duct 73 during a humidifying operation.
  • the turbo fan 75 is disposed so as not to take up space in the front-back direction as shown in FIG. 7 . Specifically, a rotating shaft of an impeller of the turbo fan 75 is disposed vertically to extend in the front-back direction. An intake port 76 of the turbo fan 75 is disposed facing the humidifying unit 60. A discharge port 77 of the turbo fan 75 is disposed diagonally and downward. The discharge port 77 and the vicinity of the discharge port 77 of the turbo fan 75 are included inside the outdoor unit 30 due to the provision of the damper 78 at the humidifying duct 73 side and the provision of the discharge port 77 diagonally and downward. The air supply duct 18 is able to be attached to the discharge port 77 of the turbo fan 75 that is exposed at an opening part 47a of the right side plate 47.
  • FIG 12 is a partial cross-sectional view of the outdoor unit 30 for showing a cross-sectional shape of the humidifying unit 60.
  • the humidifying unit 60 is fixed with a screw 53a onto the fan motor stand 53.
  • the front of the humidifying unit 60 extends up to the front plate 46.
  • the humidifying unit 60 does not move forward or backward or to the left or right in a fixed state.
  • a certain interval Is is formed between a front surface 33a of the outdoor heat exchanger 33 and a rear surface 60b of the humidifying unit 60.
  • the interval Is is reliably maintained by a rib 60c formed on the rear surface 60b.
  • the configuration of the first embodiment easily ensures the amount of outdoor air to be sucked in since the air flow of the outdoor fan 39 may be adequately used.
  • an outdoor unit 30A of the second embodiment shown in FIG. 13 includes an opening part 56Aba in the guide structure 56Ab of the grill 56A.
  • the opening part 56Aba is provided facing the intake port 68a.
  • the route r1 that progresses along the guide structure 56Ab and enters the intake port 68a and a route r4 that enters directly from the opening part 56Aba to the intake port 68a can be realized. Outdoor air is guided along the route r4 into the intake port 68a along with outdoor air fed along the route r1.
  • a dedicated fan and/or driving motor for driving the dedicated fan conventionally provided for guiding outdoor air into the moisture absorption section 61 may be omitted. While the dedicated fan is described as being omitted in the above embodiments, a reduction in size of the humidifying unit 60 is still possible if the dedicated fan and/or driving motor is made smaller instead of being omitted.
  • the outdoor unit 30 may also be reduced in size if the humidifying unit 60 is reduced in size.
  • the configuration of the first embodiment shown in FIG. 9 is one that sucks in only air guided through the outdoor fan 39 and along the guide structure 56b, 56Ab, at the intake port 68a. Outdoor air can be effectively guided into the intake port 68a by sufficiently using the air flow produced by the outdoor fan 39 in this configuration.
  • Air guided along the guide structure 56Ab on the route r1 (first route) as shown in FIG. 13 is able to be used for drawing in air guided on the route r4 (second route) and thus air with a higher humidity than the air in the route r1 (first route) is easily guided into the moisture absorption section due to the use of the route r4.
  • the humidity of outdoor air fed along the route r1 may fall due to condensation in the outdoor heat exchanger 33 since the air that passes through the outdoor heat exchanger 33 once is mostly the outdoor air fed along the route r1.
  • outdoor air that enters the intake port 68a directly from the opening part 56Aba may have a high humidity more often than the outdoor air carried along the route r1 since the outdoor air that enters the intake port 68a directly from the opening part 56Aba does not pass through the outdoor heat exchanger 33.
  • Air with a high humidity may be able to be drawn in by introducing outdoor air through the intake port 68a by using the route r4. In this case, air with a higher humidity than the air in the route r1 is guided into the moisture absorption section 61 by using the route r4 whereby humidifying performance can be improved.
  • the guide structure 56b, 56Ab is formed on the grill 56, 56A as shown in FIG. 1 , FIG. 9 , and FIG. 13 , and the grill 56, 56A as well as the guide structure 56b, 56Ab are attached to the front plate 46. That is, the attachment of the guide structure 56b, 56Ab can be conducted due to the attachment of the grill 56, 56A, whereby the guide structure 56b, 56Ab can be attached very easily.
  • the grill 56, 56A is described as being integrally formed with the guide structure 56b, 56Ab in the above embodiment, the grill 56, 56A may also be separate from the guide structure 56b, 56Ab.
  • the guide structure 56b, 56Ab may be attached directly to the front plate 46.
  • the guide structure 56b, 56Ab is formed on the grill 56, 56A and is configured with a portion in which stamping out the opening parts 56a of the grill 56, 56A is not performed.
  • the formation of the guide structure 56b, 56Ab can be conducted at the same time as the formation of the grill 56, 56A.
  • a dedicated step for forming the guide structure 56b, 56Ab may not be added and the outdoor unit 30, 30A having the guide structure 56b, 56Ab may be provided at a low cost.
  • the humidifying unit 60 has the moisture absorption duct 68 mounted above the outdoor fan 39.
  • the moisture absorption duct 68 that guides the outdoor air from the intake port 68a to the moisture absorption section 61 is understood to curve downward in relation to lines passing through vertical midpoints from the top edge to the bottom edge of the moisture absorption duct 68 as seen from the side. Since the moisture absorption duct 68 curves downward, outdoor air rising from below along the route r1 is easily sucked into the moisture absorption duct 68, and the outdoor air supplied to the moisture absorption section 61 increases whereby humidifying performance is improved.
  • the outdoor heat exchanger 33 is described as having an L-shape when seen from above in the above embodiments, the outdoor heat exchanger that is configured in the outdoor unit of the present invention is not limited to the above shape.
  • a configuration with an outdoor heat exchanger having an I-shape as seen from above may be possible.
  • the guide structure 56Bb is formed on the grill 56B and is configured with a portion in which the opening parts 56a of the grill 56B are not formed.
  • the formation of the guide structure 56Bb may be conducted at the same time as the formation of the grill 56B. Consequently, a dedicated step for forming the guide structure 56Bb may not be added and the outdoor unit 30B having the guide structure 56Bb may be provided at a low cost.
  • the rib 56r shown in FIGS. 22 and 23 is provided between the guide structure 56Bb and the front plate 46B and is a partitioning member that partitions a space sandwiched between the guide structure 56Bb and the front plate 46B.
  • the flow of air guided from the outlet port 44 to the intake port 68a due to the provision of the rib 56r passes through a channel surrounded on three sides by the front plate 46B, the guide structure 56Bb, and the rib 56r. Air may be effectively fed into the intake port 68a since the flow of air that deviates from the pathway and does not reach the intake port 68a is suppressed since the flow of air is surrounded by the channel formed by providing the rib 56r the partitioning member. While the partitioning member preferably touches, for example, the front plate 46B to partition the space without any gaps in order to suppress the flow of air flowing in an unnecessary direction, the partitioning member is not required to touch the front plate 46B.
  • the type of air conditioner applicable to the present invention is not limited to the pair-type.
  • a multi-type air conditioner in which one outdoor unit is connected to a plurality of indoor units may be applicable to the present invention.
  • the outdoor heat exchanger 33 is described as having an L-shape when seen from above in the third embodiment, the outdoor heat exchanger that is configured in the outdoor unit of the present invention is not limited to the above shape.
  • a configuration with an outdoor heat exchanger having an I-shape as seen from above may be possible.
  • outdoor fan 39B is described as having the propeller 39Bb in the third embodiment, the outdoor fan 39B is not limited to having the propeller 39Bb.
  • the outdoor unit of the present invention may be configured with an outdoor fan having a type of blade other than a propeller type.
  • a dedicated fan for guiding outdoor air to the moisture absorption section 61 and a motor for driving the fan are omitted in the third embodiment, a dedicated fan and a motor for driving the dedicated fan that are made smaller than conventional ones may be attached. Even in this case, since air is blown to the moisture absorption section 61 by the outdoor fan 39B, the outdoor unit may be made more compact than the prior art by an amount corresponding to the amount that the dedicated fan for guiding the outdoor air to the moisture absorption section 61 and/or the motor for the dedicated fan may be reduced in comparison to the prior art.
  • a rib 56t may be formed as a baffle member on an edge part 56Cb3 of a guide structure 56Cb near a rotational center 39Bb1 of the outdoor fan 39B.
  • the flow of air in the direction from the intake port 68a toward the outlet port 44 may be suppressed by the rib 56t whereby the amount of air guided to the intake port 68a increases in comparison to the grill 56B.
  • the grill 56C has the same structure as the grill 56B except for the structure of the rib 56s.
  • the baffle member is not limited to a rib structure such as the rib 56t. While the baffle member may be configured of another member such as a plastic film or sponge and the like, the baffle member preferably has a structure that is integrated with the grill 56B such as the rib 56t.
  • the grill 56D has the same structure as the grill 56B except for the structure of the rib 56s and the ribs 56u.
  • the rectifying members are not limited to the rib structure such as the ribs 56u, the rectifying members are preferably integrated with the grill 56B in the same way as the ribs 56u.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Humidification (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Central Air Conditioning (AREA)
EP12793412.3A 2011-06-01 2012-05-31 Outdoor unit for air conditioner Active EP2716984B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011123408 2011-06-01
PCT/JP2012/064036 WO2012165528A1 (ja) 2011-06-01 2012-05-31 空気調和装置の室外機

Publications (3)

Publication Number Publication Date
EP2716984A1 EP2716984A1 (en) 2014-04-09
EP2716984A4 EP2716984A4 (en) 2014-06-18
EP2716984B1 true EP2716984B1 (en) 2016-03-16

Family

ID=47259380

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Application Number Title Priority Date Filing Date
EP12793412.3A Active EP2716984B1 (en) 2011-06-01 2012-05-31 Outdoor unit for air conditioner

Country Status (7)

Country Link
EP (1) EP2716984B1 (es)
JP (1) JP5234205B2 (es)
KR (1) KR101401186B1 (es)
CN (1) CN103582785B (es)
ES (1) ES2574480T3 (es)
RU (1) RU2536029C1 (es)
WO (1) WO2012165528A1 (es)

Cited By (1)

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JP5796618B2 (ja) * 2013-11-20 2015-10-21 ダイキン工業株式会社 空調室外ユニット
JP2015098996A (ja) * 2013-11-20 2015-05-28 ダイキン工業株式会社 空調室外ユニット
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Also Published As

Publication number Publication date
EP2716984A4 (en) 2014-06-18
EP2716984A1 (en) 2014-04-09
CN103582785B (zh) 2015-07-29
WO2012165528A1 (ja) 2012-12-06
ES2574480T3 (es) 2016-06-20
JP5234205B2 (ja) 2013-07-10
KR101401186B1 (ko) 2014-05-28
KR20140009589A (ko) 2014-01-22
CN103582785A (zh) 2014-02-12
JP2013011435A (ja) 2013-01-17
RU2536029C1 (ru) 2014-12-20

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