EP2208946B1 - Unité intérieure pour climatiseur - Google Patents

Unité intérieure pour climatiseur Download PDF

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Publication number
EP2208946B1
EP2208946B1 EP08849072.7A EP08849072A EP2208946B1 EP 2208946 B1 EP2208946 B1 EP 2208946B1 EP 08849072 A EP08849072 A EP 08849072A EP 2208946 B1 EP2208946 B1 EP 2208946B1
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EP
European Patent Office
Prior art keywords
drain pan
indoor unit
air
heat exchangers
air conditioner
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.)
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Application number
EP08849072.7A
Other languages
German (de)
English (en)
Other versions
EP2208946A1 (fr
EP2208946A4 (fr
Inventor
Kouichi Yasuo
Keishi Ashida
Noriki Nishiguchi
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 EP2208946A1 publication Critical patent/EP2208946A1/fr
Publication of EP2208946A4 publication Critical patent/EP2208946A4/fr
Application granted granted Critical
Publication of EP2208946B1 publication Critical patent/EP2208946B1/fr
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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
    • 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
    • F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
    • 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
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/005—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted on the floor; standing on the floor
    • 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
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
    • 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
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the 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
    • 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
    • F24F1/0068—Indoor units, e.g. fan coil units characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing
    • 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
    • F24F1/26—Refrigerant piping
    • 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
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • 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
    • 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
    • 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
    • F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans

Definitions

  • the present invention relates to a configuration of an air conditioner indoor unit that can be made slim and compact.
  • Patent Document 1 discloses a conventional wall-mounted indoor unit of a general air conditioner.
  • the indoor unit has two front and rear drain pans, a plurality of lambdoid cross fin type heat exchangers supported on the drain pans, and a cross flow fan arranged between the heat exchangers. After passing through the heat exchangers, air is blasted into a room through a scroll passage.
  • one such indoor unit includes a centrifugal fan having a small axial dimension and a pair of heat exchangers arranged on both sides of the centrifugal fan.
  • Each of the heat exchangers is an aluminum layered type, which is small in size and high in heat exchange efficiency. After being drawn from a central portion of a front surface of the indoor unit, air is blasted forward from air outlet ports, which are formed on both sides of the indoor unit through the heat exchangers. This configuration reduces the thickness of the indoor unit.
  • a header and refrigerant outlet/inlet ports are concentrated on one side of each heat exchanger, as described in, for example, Patent Document 3. Accordingly, if each heat exchanger is arranged above the header, pipes are concentrated in a lower portion of the indoor unit. If the heat exchanger is arranged below the header, the pipes are concentrated in an upper portion of the indoor unit.
  • the size of the indoor unit must be enlarged in order to create the space for accommodating the pipes.
  • Patent Document 4 discloses a ceiling-mounted air conditioner according to the preamble of claim 1, that is thinned by reducing the height of a drain pan, the air conditioner having a casing with a substantially oblong shape in a plan view, a heat exchanger, a fan, the drain pan, and a drain pump, and being placed in the casing, along the two long sides of the casing in the plan view, the drain pan placed under the heat exchanger and having drain water receiving sections and a drain water containing section for receiving drain water produced when moisture in the air is condensed at the heat exchanger, the drain pump discharging the drain water from the drain water containing section to the outside of the casing, the drain water containing section and the drain pump being arranged, in the plan view of the casing, at substantially the center in the direction along the long sides of the casing.
  • an air conditioner indoor unit is provided according to claim 1.
  • dew drops formed on surfaces of the heat exchangers are drained to the drain pan.
  • the drain pan thus reliably collects the drained water.
  • a number of refrigerant pipes, which are concentrated below the heat exchangers, are received in the space in the drain pan without interfering with other components.
  • the indoor unit body thus can be made more compact.
  • dew drops formed on the refrigerant pipes are collected in the drain pan without being splashed to the outside.
  • a partition plate is arranged between the fan and the drain pan.
  • an air flow from the fan is prevented from affecting the refrigerant pipes and changing the phase of the refrigerant flowing in the refrigerant pipes. Further, the air flow from the fan is straightened by the partition plate and smoothly blasted toward the air outlet ports, which are arranged on both sides.
  • the partition plate also prevents the air flow from the fan from blowing out of the outlet ports through the drain pan without passing through the heat exchangers.
  • the air blowing performance of the indoor unit is thus improved.
  • the casing preferably has a back plate, and the drain pan is preferably formed integrally with the back plate of the casing.
  • the heat exchangers and the fan are incorporated as an integral body and unitized with the drain pan. Since the heat exchangers and the fan are received in the casing while being unitized, the indoor unit is manufactured, assembled, and maintained easily.
  • the two heat exchangers preferably each extend across the corresponding one of the air passages and are inclined in mutually different directions.
  • Positioning members for positioning the heat exchangers are preferably arranged on both sides in the drain pan.
  • the configuration greatly facilitates the assembly of the heat exchangers with the drain pan, thus improving the production efficiency.
  • Stepped portions for positioning the heat exchangers are preferably formed in a bottom portion of the drain pan.
  • This configuration greatly facilitates the assembly of the heat exchangers with the drain pan, thus improving the production efficiency.
  • Each of the stepped portions of the drain pan is preferably formed by a wide portion corresponding to an upper portion of the drain pan and a narrow portion corresponding to the bottom portion of the drain pan, and a heat insulating material is preferably arranged on an outer surface of the narrow portion formed in the bottom portion of the drain pan.
  • This configuration allows the insulating material to be easily mounted and attached, and the stepped portions are used further effectively.
  • the air conditioner indoor unit is a twin type formed by a pair of indoor subunits that are arranged side by side.
  • the indoor subunits each include a fan and two heat exchangers, which are arranged on both sides of the fan.
  • the air conditioner indoor unit has a flat cassette type body casing 1, which is elongated in a lateral direction and thin in a front-rear direction.
  • the body casing 1 is formed by a back panel (a back plate) 1a, two side panels (side plates) 1b, a front panel (a front plate) 1c, an upper panel (a top plate) 1d, and a bottom panel (a bottom plate) 1e.
  • the back panel 1a forms an attachment surface to which fan motors 8b of turbofans 8, which will be described later, are attached.
  • the two indoor subunits which are arranged adjacent to each other, are formed identically. Accordingly, only one of the indoor subunits will be described.
  • a circular air inlet port 5 which functions as a bellmouth, is formed in a central portion of a part of the front panel 1c that forms one of the indoor subunits.
  • a turbofan 8 serving as a centrifugal fan, which has a small depth, is arranged inside the air inlet port 5.
  • Each turbofan 8 has a main plate 8d, a shroud 8c, and a plurality of blades 8a (an impeller), which are arranged between the shroud 8c and the main plate 8d.
  • the two of the air outlet ports 7 that are arranged adjacent to each other in a central portion of the body casing 1 are formed as a common outlet port for the two adjacent indoor subunits.
  • two air passages 6 extend from each air inlet port 5 having the bellmouth structure and separate toward the corresponding air outlet ports 7, which are arranged on both sides of the air inlet port 5.
  • the turbofan 8 corresponding to the shroud 8c is formed in the air passages 6 and at the back of the air inlet port 5. Specifically, the turbofan 8 is received in the air inlet port 5 with a clearance around the turbofan 8.
  • the turbofan 8 is attached to the back panel 1a of the body casing 1 with the fan motor 8b, which is arranged inside the impeller.
  • the back panel 1a has a necessary height H and is formed integrally with a back plate 16 of a drain pan 15, which is located below the back panel 1a (the back panel 1a is formed by extending the back plate 16, which is the same plate forming the back panel 1a, upward).
  • a pair of heat exchangers 9 are located on both sides of each turbofan 8 in the air passages 6.
  • the heat exchangers 9 are located at the positions corresponding to the air outlet ports 7, which are arranged below the air passages 6.
  • the two heat exchangers 9 are arranged in the corresponding two air passages 6, which extend from the central portion of the body casing 1 toward both sides, in such a manner that the heat exchangers 9 extend across the corresponding air passages 6 and greatly incline in mutually different directions.
  • the two heat exchangers 9 are greatly inclined with respect to the corresponding air passages 6. Accordingly, as is clear from Fig. 3 , a necessary heat exchange surface area is effectively ensured, and the width (the depth) of the indoor unit body in the front-rear direction is minimized. As a result, the indoor unit body is made slimmer.
  • each of the heat exchangers 9 is formed by a compact aluminum layered type heat exchanger, which includes flat heat transmission pipes (porous pipes) 9a and flat heat-transfer fins (which are, for example, corrugated fins) 9b and exhibits extremely high heat transmission performance.
  • a pair of refrigerant headers 20 (20a, 20b) are arranged below each heat exchanger 9.
  • a plurality of refrigerant pipes 21a, 21b, 21c, 21d are connected to the corresponding refrigerant headers 20 (20a, 20b) in a concentrated manner.
  • each heat exchanger 9 is supported with the refrigerant headers 20, which are arranged at the lower end of the heat exchanger 9, received in the drain pan 15.
  • the refrigerant headers 20 are fixed and accurately positioned at predetermined positions on a bottom surface 15a of the drain pan 15 by positioning members 22, 23. In this manner, the heat exchangers 9 are supported by and integrated with the drain pan 15.
  • the positioning members 22, 23 include positioning members 22a, 23a, 22b, 23b.
  • the positioning members 22b, 23b each have a small height in the vertical direction.
  • the height of each positioning member 22a, 23a is greater than the height of each positioning member 22b, 23b.
  • the positioning members 22b, 23b each include a tapered surface for setting the inclination angle of the heat exchanger 9.
  • Recesses 22c, 23c are each formed by the corresponding positioning members 22a, 23a, 22b, 23b and the inner surface of the drain pan 15.
  • Each one of the recesses 22c, 23c is fixedly engaged with the end portion and the outer peripheral portion of the corresponding one of the refrigerant headers 20, which corresponds to the front or rear corner of the heat exchanger 9.
  • the recesses 22c, 23c are formed in correspondence with the inclination angles of the corresponding heat exchangers 9.
  • the heat exchanger 9 is easily installed in a stable state at a desired height and a desired inclination angle.
  • a pair of supercooling heat exchangers 19 are provided.
  • the supercooling heat exchangers 19 function as condensers when the air conditioner is in heating operation and as evaporators when the air conditioner is in cooling operation.
  • the two supercooling heat exchangers 19 are arranged substantially symmetrically between each turbofan 8 and the heat exchangers 9 arranged on both sides of the turbofan 8.
  • each of the supercooling heat exchangers 19 is configured as a small-sized cylindrical heat exchanger with fins, which is configured simply by wrapping a spine fin 19a around a heat exchange tube 21d, which is a continuous refrigerant pipe.
  • Each supercooling heat exchanger 19 is arranged in such a manner that the heat exchange tube 21d extends in the vertical direction.
  • each vacuum heat insulating material 10 is bonded to the inner surfaces of the back panel 1a, the side panel 1b, and the front panel 1c, which face each heat exchanger 9.
  • Each of the vacuum heat insulating materials 10 is flat and a vacuum is formed in the vacuum heat insulating material 10.
  • each vacuum heat insulating material 10 has a hollow synthetic resin sheet 10a and an aluminum foil 10c.
  • the inside of the resin sheet 10a is filled with a shape retaining glass wool 10b.
  • the aluminum foil 10c is bonded to the outer periphery of the sheet 10a.
  • the heat exchangers 9, each of which is a compact aluminum layered type and has a high heat exchange efficiency, are arranged on both sides of the corresponding turbofan 8 in the inclined state. After being drawn through each air inlet port 5, which is arranged in a front central portion, air is blasted forward from the air outlet ports 7 on both sides.
  • This configuration minimizes the thickness of the indoor unit body.
  • the drain pan 15 (the bottom surface 15a), which is shaped like a plate and extends in correspondence with the entire portion of the indoor unit body, is arranged below the two heat exchangers 9 and the associated turbofan 8.
  • a large number of refrigerant pipes 21a to 21d connected to the corresponding heat exchangers 9 are accommodated in the drain pan 15 using the vacant space in the drain pan 15 having a predetermined depth.
  • each heat exchanger 9 which is the layered type
  • the refrigerant headers 20 and the inlet and outlet ports of the refrigerant pipes 21a to 21d are concentrated on one side of the heat exchanger 9. Accordingly, if the heat exchangers 9 are arranged above the refrigerant headers 20 as illustrated in Fig. 7 , the refrigerant pipes 21a to 21d are concentrated below the heat exchangers 9. Contrastingly, if the heat exchangers 9 are arranged below the refrigerant headers 20 as illustrated in Fig. 17 , the refrigerant pipes 21a to 21d are concentrated above the heat exchangers 9. In this case, the indoor unit body must be enlarged in size to ensure the space for accommodating the pipes.
  • dew drops formed on the refrigerant pipes may drip and hit a structure such as a fan, and thus may be splashed to the outside of the unit. If a heat insulating material is wrapped around the pipes to prevent dew condensation, the size of the indoor unit will be further enlarged.
  • the drain pan 15 is arranged below the two heat exchangers 9, which are arranged for each turbofan 8, and the turbofan 8, with reference to Figs. 4 and 8 , for example.
  • the drain pan 15 receives the refrigerant pipes 21a to 21d, which connect each pair of heat exchangers 9 together. In this manner, all of the pipes are received in the drain pan 15, thus solving the above-described problem.
  • the condensed water on the surfaces of the heat exchangers 9 is drained to the drain pan 15.
  • the drain pan 15 thus reliably collects the condensation water. Further, a large number of refrigerant pipes 21a to 21d, which are concentrated below the heat exchangers 9, are accommodated in the vacant space in the drain pan 15 without interfering with other components.
  • dew drops formed on the refrigerant pipes 21a to 21d are collected directly by the drain pan 15 without being splashed to the outside.
  • the drain pan 15 is formed integrally with the back panel 1a of the indoor unit casing, as has been described.
  • the drain pan 15 is formed integrally with the back panel 1a of the indoor unit casing, using which the turbofans 8 are mounted, the heat exchangers 9 and the associated turbofan 8 are incorporated as an integral body and unitized with the drain pan 15. Accordingly, while being unitized, the drain pan 15, the heat exchangers 9, and the turbofans 8 are accommodated in the body casing 1 of the indoor unit as an integral body. This facilitates the assembly, manufacture, and maintenance of the indoor unit.
  • each turbofan 8 it is necessary to partition the air chamber of each turbofan 8 from the space in the drain pan 15 in some way. Specifically, through such partitioning, the air flow from the turbofan 8 must be smoothly straightened toward the corresponding air outlet ports 7 and prevented from affecting the refrigerant pipes 21a to 21d in order to prevent change of the phase of the refrigerant.
  • a partition plate 17 is arranged in such a manner as to separate the turbofans 8 and the heat exchangers 9 from the drain pan 15 (and the refrigerant pipes 21a to 21d), as illustrated in Fig. 12 .
  • the partition plate 17 is flat in the present embodiment, the partition plate 17 may be formed in an arcuate shape or a scroll shape.
  • the partition plate 17 prevents the air flows from the turbofans 8 and the heat exchangers 9 from affecting the refrigerant pipes 21a to 21d. Accordingly, the phase of the refrigerant flowing in the refrigerant pipes 21a to 21d is prevented from changing.
  • partition plate 17 smoothly straightens the air flow from each turbofan 8 toward the air outlet ports 7, thus improving the air blowing performance of the turbofan 8. This improves the heat exchange efficiency of each heat exchanger 9.
  • the partition plate 17 prevents the air flow from each turbofan 8 from blowing out of the air outlet ports 7 via the drain pan 15 without passing through the corresponding heat exchanger 9.
  • front covers 2, 3 are arranged at the front side of the front panel 1c as necessary, as illustrated in, for example, Figs. 1 and 2 .
  • the two center front covers 2 cover the air inlet ports 5 and the air outlet ports 7 at the center.
  • the two front covers 3 on both sides each cover the corresponding one of the air outlet ports 7, which are located on both sides of the body casing 1.
  • the center front covers 2 are each supported by a support member 21, which is configured as, for example, a link, in such a manner that each front cover 2 is selectively opened and closed in the front-read direction (or a direction inclined with respect to the front-rear direction).
  • a support member 21 which is configured as, for example, a link, in such a manner that each front cover 2 is selectively opened and closed in the front-read direction (or a direction inclined with respect to the front-rear direction).
  • each of the front covers 3 on both sides is supported by a hinge structure in such a manner that each front cover 3 is selectively opened and closed.
  • the air outlet ports 7 on both sides of the casing are held open and the air is blown out of the air outlet ports 7.
  • the indoor unit as a whole forms a simple slim cabinet structure having a flat front surface.
  • the second embodiment is different from the first embodiment in that the drain pan 15 includes stepped portions 15b.
  • positioning members 24, 25 for setting inclination angles are arranged in the drain pan 15.
  • the stepped portions 15b are formed in a lower portion of the drain pan 15, with reference to Figs. 13 to 15 .
  • the upper stepped surface of each stepped portion 15b functions as a positioning member for a height direction.
  • Each stepped portion 15b is formed by a wide portion corresponding to an upper portion of the drain pan 15 and a narrow portion corresponding to a bottom portion of the drain pan 15.
  • a vacuum heat insulating material 10 having a minimized thickness is arranged at the outer surface of the narrow portions of the stepped portions 15b (the outer surface of the bottom portion of the drain pan 15), as illustrated in, for example, Fig. 16 .
  • the vacuum heat insulating material 10 is formed by, for example, a hollow sheet 10a formed of synthetic resin and an aluminum foil 10c.
  • the inside of the hollow sheet 10a is filled with a shape retaining glass wool 10b.
  • the aluminum foil 10c is bonded to the outer periphery of the sheet 10a.
  • a heat insulating material is bonded to the drain pan 15 in order to prevent dew condensation.
  • the positioning members 22b, 23b of the above-described first embodiment are replaced by the stepped portions 15b formed in the drain pan 15.
  • Each stepped portion 15b functions as positioning means for the height direction.
  • the other portions of the second embodiment are configured identically to the corresponding portions of the second embodiment.
  • the second embodiment has the same advantages as those of the first embodiment.
  • each supercooling heat exchanger 19 of the first embodiment is configured by a flat cross fin coil type supercooling heat exchanger 19, which is illustrated in, for example, Figs. 18 to 20 , instead of the heat exchanger having the cylindrical spine fin.
  • the thickness of the cross fin coil type supercooling heat exchanger 19 is significantly less than the aforementioned spine fin type supercooling heat exchanger. This configuration saves space and reduces the pressure loss of each turbofan 8, thus raising heat exchange performance by 50% or more for a constant fan resistance. Accordingly, the supercooling heat exchange efficiency is improved.
  • refrigerant pipes 21d having U-shaped pipe structures may be employed. This makes it possible to arrange all of the refrigerant pipes 21a to 21d extending from the refrigerant headers 20, which include the refrigerant pipe 21d connecting the adjacent supercooling heat exchangers 19 to each other, in the drain pan 15. This allows all of the refrigerant pipes 21a to 21d to be accommodated in the drain pan 15, and thus brings about the advantage that the indoor unit is further reduced in size. Also, dew drops formed on the surfaces of the refrigerant pipes 21a to 21d are completely prevented from being splashed to the outside of the indoor unit.
  • each cross fin coil type supercooling heat exchanger 19 a plate fin extends perpendicular to a heat transmission pipe.
  • the portion corresponding to the plate fin is arranged horizontally, thus causing a minor problem about water drainage.
  • each supercooling heat exchanger 19 in a slanted manner so that the supercooling heat exchanger 19 is slightly inclined in a horizontal direction with respect to a vertical direction, instead of installing the supercooling heat exchanger 19 linearly in the vertical direction.
  • the other portions of the third embodiment are configured identically to the corresponding portions of the first embodiment.
  • the third embodiment has the same advantages as those of the first embodiment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Claims (6)

  1. Unité intérieure de climatiseur comprenant un carter en forme de caisson (1), un orifice d'entrée d'air (5), une paire d'orifices de sortie d'air (7), une paire de passages d'air (6) formés dans le carter (1) et s'étendant de l'orifice d'entrée d'air (5) aux orifices de sortie d'air (7), un ventilateur (8) qui est agencé en amont des passages d'air (6) et correspond à l'orifice d'entrée d'air (5), une paire d'échangeurs de chaleur (9) qui sont agencés en aval des passages d'air (6) et correspondent aux orifices de sortie d'air (7), et un tube de réfrigérant (21a, 21b, 21c, 21d) reliant les échangeurs de chaleur (9) entre eux, dans laquelle un bac de purge (15) est agencé en dessous des échangeurs de chaleur (9) et du ventilateur (8), caractérisée en ce que :
    l'orifice d'entrée d'air (5) est formé dans une partie centrale d'une surface avant du carter (1), la paire d'orifices de sortie d'air (7) est formée de part et d'autre de la surface avant du carter (1), dans laquelle le tube de réfrigérant (21a, 21b, 21c, 21d) est reçu sur le bac de purge (15), et une plaque de séparation (17) est agencée entre le ventilateur (8) et le bac de purge (15).
  2. Unité intérieure de climatiseur selon la revendication 1, caractérisée en ce que le carter (1) comporte un panneau arrière (16), le bac de purge (15) étant formé d'une seule pièce avec le panneau arrière (16) du carter (1).
  3. Unité intérieure de climatiseur selon l'une quelconque des revendications 1 et 2, caractérisée en ce que les deux échangeurs de chaleur (9) s'étendent chacun à travers celui correspondant des passages d'air (6) et sont inclinés dans des directions mutuellement différentes.
  4. Unité intérieure de climatiseur selon l'une quelconque des revendications 1 à 3, caractérisée en ce que des éléments de positionnement (22, 23, 24, 25) pour positionner les échangeurs de chaleur (9) sont agencés des deux côtés dans le bac de purge (15).
  5. Unité intérieure de climatiseur selon l'une quelconque des revendications 1 à 3, caractérisée en ce que des parties étagées (15b) pour positionner les échangeurs de chaleur (9) sont formées dans une partie inférieure du bac de purge (15).
  6. Unité intérieure de climatiseur selon la revendication 5, caractérisée en ce que chacune des parties étagées (15b) du bac de purge (15) est formée par une partie large correspondant à une partie supérieure du bac de purge (15) et une partie étroite correspondant à la partie inférieure du bac de purge (15), un matériau d'isolation thermique (10) étant agencé sur une surface extérieure de la partie étroite formée dans la partie inférieure du bac de purge (15).
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PCT/JP2008/070029 WO2009063770A1 (fr) 2007-11-12 2008-11-04 Unité intérieure pour climatiseur

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ES2642870T3 (es) 2017-11-20
KR20100056556A (ko) 2010-05-27
CN101821557A (zh) 2010-09-01
CN101821557B (zh) 2013-04-24
US20100199700A1 (en) 2010-08-12
EP2208946A1 (fr) 2010-07-21
AU2008321997A1 (en) 2009-05-22
WO2009063770A1 (fr) 2009-05-22
JP2009139078A (ja) 2009-06-25
EP2208946A4 (fr) 2014-07-02
JP5422953B2 (ja) 2014-02-19
AU2008321997B2 (en) 2011-03-17

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