US20100199700A1 - Indoor unit for air conditioner - Google Patents

Indoor unit for air conditioner Download PDF

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Publication number
US20100199700A1
US20100199700A1 US12/678,685 US67868508A US2010199700A1 US 20100199700 A1 US20100199700 A1 US 20100199700A1 US 67868508 A US67868508 A US 67868508A US 2010199700 A1 US2010199700 A1 US 2010199700A1
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US
United States
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.)
Abandoned
Application number
US12/678,685
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English (en)
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Assigned to DAIKIN INDUSTRIES, LTD. reassignment DAIKIN INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASHIDA, KEISHI, NISHIGUCHI, NORIKI, YASUO, KOUICHI
Publication of US20100199700A1 publication Critical patent/US20100199700A1/en
Abandoned legal-status Critical Current

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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.
  • an air conditioner indoor unit includes a box-shaped casing, an air inlet port formed in a central portion of a front surface of the casing, a pair of air outlet ports formed on both sides of the front surface of the casing, a pair of air passages formed in the casing and extending from the air inlet port to the air outlet ports, a fan that is arranged upstream from the air passages and corresponds to the air inlet port, a pair of heat exchangers that are arranged downstream from the air passages and correspond to the air outlet ports, and a refrigerant pipe connecting the heat exchangers to each other.
  • a drain pan is arranged below the heat exchangers and the fan, and the refrigerant pipe is received in the drain pan.
  • dew drops formed on surfaces of the heat exchangers are drained to the drain pan.
  • the drain pan thus reliably collects the drained water. Also, 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.
  • 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.
  • a partition plate is preferably 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 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.
  • FIG. 1 is a perspective view showing an air conditioner indoor unit, as a whole, according to a first embodiment of the present invention
  • FIG. 2 is a cross-sectional view showing the indoor unit illustrated in FIG. 1 with a front cover in an open state;
  • FIG. 3 is a cross-sectional plan view showing the indoor unit of FIG. 1 ;
  • FIG. 4 is a perspective view showing the internal structure of the indoor unit of FIG. 1 ;
  • FIG. 5 is a perspective view showing the configuration of a main heat exchanger of the indoor unit of FIG. 1 ;
  • FIG. 6 is a perspective view showing the configuration of an auxiliary heat exchanger of the indoor unit of FIG. 1 ;
  • FIG. 7 is a perspective view showing the arrangement of refrigerant pipes in the indoor unit of FIG. 1 ;
  • FIG. 8 is a perspective view showing the refrigerant pipes illustrated in FIG. 7 in a state received in a drain pan;
  • FIG. 9 is a plan view showing the configuration of a positioning portion of the heat exchanger of the indoor unit of FIG. 1 ;
  • FIG. 10 is a longitudinal cross-sectional view showing the positioning portion illustrated in FIG. 9 ;
  • FIG. 11 is a longitudinal cross-sectional view showing the positioning portion of FIG. 9 as viewed from the side;
  • FIG. 12 is a longitudinal cross-sectional view showing the indoor unit of FIG. 1 with a partition plate installed, as viewed from the front;
  • FIG. 13 is a plan view showing a positioning portion of a heat exchanger of an air conditioner indoor unit according to a second embodiment of the present invention.
  • FIG. 14 is a longitudinal cross-sectional view showing the positioning portion illustrated in FIG. 13 ;
  • FIG. 15 is a longitudinal cross-sectional view showing the positioning portion of FIG. 13 as viewed from the side;
  • FIG. 16 is a cross-sectional view showing the configuration of a heat insulating material bonded to a lower surface of the positioning portion of FIG. 13 ;
  • FIG. 17 is a perspective view showing an example of the layout of refrigerant pipes of an air conditioner indoor unit according to the present invention.
  • FIG. 18 is a perspective view showing the configuration of the interior of an air conditioner indoor unit, as a whole, according to a third embodiment of the present invention.
  • FIG. 19 is a perspective view showing the arrangement of refrigerant pipes of the indoor unit illustrated in FIG. 18 ;
  • FIG. 20 is a perspective view showing the refrigerant pipes illustrated in FIG. 19 received in a drain pan as in the state (the integrated state) illustrated in FIG. 8 .
  • FIGS. 1 to 12 The configuration of an air conditioner indoor unit according to a first embodiment of the present invention will now be described with reference to FIGS. 1 to 12 .
  • 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) 1 a, two side panels (side plates) 1 b, a front panel (a front plate) 1 c, an upper panel (a top plate) 1 d, and a bottom panel (a bottom plate) 1 e.
  • the back panel 1 a forms an attachment surface to which fan motors 8 b 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 1 c that forms one of the indoor subunits.
  • Each turbofan 8 has a main plate 8 d, a shroud 8 c, and a plurality of blades 8 a (an impeller), which are arranged between the shroud 8 c and the main plate 8 d.
  • a pair of rectangular air outlet ports 7 are formed on both sides of each air inlet port 5 of the front panel 1 c.
  • 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 8 c is formed in the air passages 6 and at the back of the air inlet port 5 .
  • 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 1 a of the body casing 1 with the fan motor 8 b, which is arranged inside the impeller.
  • the back panel 1 a 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 1 a (the back panel 1 a is formed by extending the back plate 16 , which is the same plate forming the back panel 1 a, 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) 9 a and flat heat-transfer fins (which are, for example, corrugated fins) 9 b and exhibits extremely high heat transmission performance.
  • a pair of refrigerant headers 20 ( 20 a, 20 b ) are arranged below each heat exchanger 9 .
  • a plurality of refrigerant pipes 21 a, 21 b, 21 c, 21 d are connected to the corresponding refrigerant headers 20 ( 20 a, 20 b ) 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 15 a 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 22 a, 23 a, 22 b, 23 b.
  • the positioning members 22 a, 23 a each have a small height in the vertical direction.
  • the height of each positioning member 22 b, 23 b is greater than the height of each positioning member 22 a, 23 a.
  • the positioning members 22 b, 23 b each include a tapered surface for setting the inclination angle of the heat exchanger 9 .
  • Recesses 22 c, 23 c are each formed by the corresponding positioning members 22 a, 23 a, 22 b, 23 b and the inner surface of the drain pan 15 .
  • Each one of the recesses 22 c, 23 c 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 22 c, 23 c 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.
  • 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 19 a around a heat exchange tube 21 d, which is a continuous refrigerant pipe.
  • Each supercooling heat exchanger 19 is arranged in such a manner that the heat exchange tube 21 d extends in the vertical direction.
  • each vacuum heat insulating material 10 is bonded to the inner surfaces of the back panel 1 a, the side panel 1 b, and the front panel 1 c, 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 .
  • FIGS. 16 which will be explained below, each vacuum heat insulating material 10 has a hollow synthetic resin sheet 10 a and an aluminum foil 10 c.
  • the inside of the resin sheet 10 a is filled with a shape retaining glass wool 10 b.
  • the aluminum foil 10 c is bonded to the outer periphery of the sheet 10 a.
  • the heat exchangers 9 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. Further, as illustrated in FIG. 4 (a view from front) and FIG.
  • the drain pan 15 (the bottom surface 15 a ), 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 21 a to 21 d 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 21 a to 21 d 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 21 a to 21 d 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 21 a to 21 d are concentrated above the heat exchangers 9 .
  • the indoor unit body must be enlarged in size to ensure the space for accommodating the pipes. Also, when the air conditioner is in cooling operation, 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 21 a to 21 d, 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 21 a to 21 d, 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 21 a to 21 d 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 1 a of the indoor unit casing, as has been described.
  • the drain pan 15 is formed integrally with the back panel 1 a 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 21 a to 21 d 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 21 a to 21 d ), as illustrated in FIG. 12 .
  • by shaping the partition plate 17 as needed in correspondence with the shape of each turbofan 8 flow straightening performance is improved so that air blowing performance is improved.
  • 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 21 a to 21 d. Accordingly, the phase of the refrigerant flowing in the refrigerant pipes 21 a to 21 d is prevented from changing.
  • the 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 1 c 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 15 b.
  • positioning members 24 , 25 for setting inclination angles are arranged in the drain pan 15 .
  • the stepped portions 15 b 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 15 b functions as a positioning member for a height direction.
  • Each stepped portion 15 b 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 15 b (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 10 a formed of synthetic resin and an aluminum foil 10 c.
  • the inside of the hollow sheet 10 a is filled with a shape retaining glass wool 10 b.
  • the aluminum foil 10 c is bonded to the outer periphery of the sheet 10 a.
  • a heat insulating material is bonded to the drain pan 15 in order to prevent dew condensation.
  • the positioning members 22 b, 23 b of the above-described first embodiment are replaced by the stepped portions 15 b formed in the drain pan 15 .
  • Each stepped portion 15 b 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 21 d having U-shaped pipe structures may be employed. This makes it possible to arrange all of the refrigerant pipes 21 a to 21 d extending from the refrigerant headers 20 , which include the refrigerant pipe 21 d connecting the adjacent supercooling heat exchangers 19 to each other, in the drain pan 15 . This allows all of the refrigerant pipes 21 a to 21 d 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 21 a to 21 d 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.
US12/678,685 2007-11-12 2008-11-04 Indoor unit for air conditioner Abandoned US20100199700A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2007292765 2007-11-12
JP2007-292765 2007-11-12
JP2008-245053 2008-09-25
JP2008245053A JP5422953B2 (ja) 2007-11-12 2008-09-25 空気調和機用室内機
PCT/JP2008/070029 WO2009063770A1 (ja) 2007-11-12 2008-11-04 空気調和機用室内機

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US20180010812A1 (en) * 2015-04-17 2018-01-11 Mitsubishi Electric Corporation Indoor unit of air-conditioning apparatus
CN109974084A (zh) * 2019-03-29 2019-07-05 广东美的制冷设备有限公司 空调器及空调器的控制方法
US20190376699A1 (en) * 2018-06-07 2019-12-12 Tadiran Consumer And Technology Products Ltd. Building structure for garage mounted apparatus
US11662104B2 (en) 2021-03-26 2023-05-30 First Co. Independent temperature control for rooms
USD1004756S1 (en) * 2020-12-24 2023-11-14 Lg Electronics Inc. Modular air conditioner

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JP5741658B2 (ja) * 2013-09-11 2015-07-01 ダイキン工業株式会社 熱交換器及び空気調和機
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JP6641457B2 (ja) * 2016-03-28 2020-02-05 三菱電機株式会社 空気調和機の室内機
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US20160040896A1 (en) * 2014-08-05 2016-02-11 Samsung Electronics Co., Ltd. Air conditioner
US20180010812A1 (en) * 2015-04-17 2018-01-11 Mitsubishi Electric Corporation Indoor unit of air-conditioning apparatus
US10746416B2 (en) * 2015-04-17 2020-08-18 Mitsubishi Electric Corporation Indoor unit of air-conditioning apparatus
US20190376699A1 (en) * 2018-06-07 2019-12-12 Tadiran Consumer And Technology Products Ltd. Building structure for garage mounted apparatus
CN109974084A (zh) * 2019-03-29 2019-07-05 广东美的制冷设备有限公司 空调器及空调器的控制方法
USD1004756S1 (en) * 2020-12-24 2023-11-14 Lg Electronics Inc. Modular air conditioner
US11662104B2 (en) 2021-03-26 2023-05-30 First Co. Independent temperature control for rooms

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KR20100056556A (ko) 2010-05-27
CN101821557A (zh) 2010-09-01
AU2008321997B2 (en) 2011-03-17
EP2208946A4 (en) 2014-07-02
EP2208946A1 (en) 2010-07-21
EP2208946B1 (en) 2017-09-06
CN101821557B (zh) 2013-04-24
AU2008321997A1 (en) 2009-05-22
JP5422953B2 (ja) 2014-02-19
JP2009139078A (ja) 2009-06-25
ES2642870T3 (es) 2017-11-20
WO2009063770A1 (ja) 2009-05-22

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