EP3396268A1 - Innenraumeinheit einer klimaanlage - Google Patents

Innenraumeinheit einer klimaanlage Download PDF

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Publication number
EP3396268A1
EP3396268A1 EP18169621.2A EP18169621A EP3396268A1 EP 3396268 A1 EP3396268 A1 EP 3396268A1 EP 18169621 A EP18169621 A EP 18169621A EP 3396268 A1 EP3396268 A1 EP 3396268A1
Authority
EP
European Patent Office
Prior art keywords
discharge port
protruding portion
conditioned air
indoor unit
air
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.)
Withdrawn
Application number
EP18169621.2A
Other languages
English (en)
French (fr)
Inventor
Hirofumi Ishizuka
Soichiro Matsumoto
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.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems 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 Mitsubishi Heavy Industries Thermal Systems Ltd filed Critical Mitsubishi Heavy Industries Thermal Systems Ltd
Publication of EP3396268A1 publication Critical patent/EP3396268A1/de
Withdrawn legal-status Critical Current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
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/26—Arrangements for air-circulation by means of induction, e.g. by fluid coupling or thermal effect
    • 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
    • F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew

Definitions

  • the present invention relates to an indoor unit of an air conditioner.
  • an indoor unit of an air conditioner including a main body which accommodates a heat exchanger, a blower fan and so on therein and a panel which covers the main body is known.
  • Such an indoor unit of an air conditioner has a suction port which suctions room air and a discharge port which discharges conditioned air after adjusting the temperature and humidity of the room air.
  • Japanese Unexamined Patent Application, First Publication No. 2012-251676 discloses a solution to reduce dew condensation generated in a louver provided at the discharge port.
  • An object of the present invention is to provide an indoor unit of an air conditioner capable of minimizing dew condensation around a discharge port.
  • a main body a discharge port formed on the main body and is configured to discharge conditioned air from the main body; and a protruding portion formed on an inner surface of the discharge port so as to be positioned at an upstream side of the conditioned air with respect to an opening edge of the discharge port which is an end section of the discharge port at a downstream side of the conditioned air, wherein the protruding portion is configured to remove the conditioned air from the inner surface of the discharge port so as to separate it from the opening edge of the discharge port, and thereby room air is led into the discharge port through the opening edge thereof.
  • the conditioned air flowing from the upstream side of the protruding portion is removed from the inner surface of the discharge port by blowing to the protruding portion.
  • the conditioned air is removed from the opening edge of the discharge port, the room air is led into the discharge port through the opening edge, and thereby a temperature around the discharge port increases. Accordingly, dew condensation around the discharge port can be reduced.
  • a cross-sectional shape of the discharge port may be a rectangular shape when seen in a flow direction of the conditioned air, and the protruding portion may be protruded from the inner surface of the discharge port which intersects a longitudinal direction of the rectangular shape of the discharge port.
  • the conditioned air Since a flow velocity of the conditioned air is slowed down at ends of the discharge port in the longitudinal direction of the rectangular shape thereof, the conditioned air intends to flow along a wall surface of the side end of the discharge port, and dew condensation easily occurs on the wall surface. Since the protruding portion is protruded from the inner surfaces of the discharge port (i.e. ends of the discharge port in the longitudinal direction of the discharge port) which intersects the longitudinal direction of the rectangular shape of the discharge port, the dew condensation on this inner surfaces can be particularly prevented.
  • a height of the protruding portion from the inner surface of the discharge port may be 2 mm to 15 mm.
  • the protruding portion may include a parallel surface parallel to the inner surface of the discharge port, a downstream side surface positioned between a downstream side end of the parallel surface and the inner surface of the discharge port, and an upstream side surface positioned between an upstream side end of the parallel surface and the inner surface of the discharge port, and the upstream side surface may be inclined with respect to the inner surface of the discharge port toward a downstream side of the conditioned air as close to a top of the protruding portion.
  • the conditioned air can be separated from the inner surfaces without disturbing a flow of the conditioned air.
  • the conditioned air flowing from the upstream side of the protruding portion is removed from the inner surface of the discharge port by blowing to the protruding portion.
  • the conditioned air is removed from the opening edge of the discharge port, the room air is led into the discharge port through the opening edge, and thereby a temperature around the discharge port increases. Accordingly, the dew condensation around the discharge port can be reduced.
  • the indoor unit 1 of an air conditioner includes a main body 2 embedded in a ceiling, a suction port 3 and a discharge port 4 provided in the main body 2, and a louver 5 which opens and closes the discharge port 4.
  • the indoor unit 1 of the air conditioner has a substantially square shape when seen from a lower side.
  • the main body 2 includes a heat exchanger, a blower fan, and so on which are not illustrated.
  • the main body 2 adjusts the temperature and humidity of room air RA suctioned through the suction port 3 and discharges it into a room as conditioned air CA (refer to FIG. 4 ).
  • An outdoor unit (not illustrated) is connected to the main body 2.
  • a refrigerant circulates between the indoor unit 1 of the air conditioner and the outdoor unit.
  • a vertical direction is a flow direction F of the conditioned air CA
  • an upper side is an upstream side F1 of the conditioned air CA
  • a lower side is a downstream side F2 of the conditioned air CA.
  • the panel 7 is exposed in the room (downward).
  • the panel 7 has a louver panel 8 disposed around the louver 5.
  • the suction port 3 for suctioning the room air RA is formed to open downward in a central portion of the indoor unit 1 of the air conditioner.
  • a suction grille 9 at which an air filter (not illustrated) is installed is provided at the suction port 3.
  • the suction grille 9 has a substantially square shape when seen from below.
  • the four sides of the indoor unit 1 of the air conditioner are parallel to the four sides of the suction grille 9.
  • the discharge port 4 is formed to open downward to surround a circumference of the suction port 3. These discharge ports 4 are provided so that each of the discharge ports 4 extends along one side to correspond to one side of the indoor unit 1 of the air conditioner.
  • the louver 5 and the main body 2 are connected via a rotating shaft 10 provided at the louver 5.
  • the louver 5 is rotatable between a closed position in which an inside of the discharge port 4 is closed and an open position in which the inside of the discharge port 4 is open.
  • a surface 8a of the louver panel 8 and a surface 5a of the louver 5 are flush with each other when the louver 5 is in the closed position.
  • Each of the louvers 5 has a rectangular shape having a smaller overall size than the discharge ports 4.
  • the louver 5 is rotated by a driving device such as an actuator (not illustrated).
  • a cross-sectional shape of the discharge port 4 seen in the flow direction F of the conditioned air CA is a rectangular shape.
  • an inner surface of the discharge port 4 is formed in a rectangular tubular shape and has four surfaces.
  • the discharge port 4 includes a first surface 11 on the suction port 3 side in a longitudinal direction of the discharge port 4, a second surface 12 facing the first surface 11, and a pair of third surfaces 13 connecting the first surface 11 with the second surface 12.
  • the pair of third surfaces 13 are surfaces orthogonal to the longitudinal direction of the discharge port 4.
  • the discharge port 4 gradually expands toward a downstream side F2 (downward).
  • the indoor unit 1 of the air conditioner of the embodiment has a protruding portion 15 formed on the inner surface of the discharge port 4 and protruding inside the inner surface.
  • the protruding portion 15 is positioned at the upstream side F1 (upward) of an opening edge 4a which is an end of the inner surface of the discharge port 4 on the downstream side F1 of the conditioned air CA.
  • the protruding portion 15 has a function that the conditioned air CA is removed from the inner surface of the discharge port 4 by the protruding portion 15 so as to separate from the opening edge 4a of the discharge port 4, and thereby room air RA is led into the discharge port 4 through the opening edge 4a.
  • the protruding portion 15 is formed only on a third surface 13 of the inner surface. In other words, the protruding portion 15 is protruded from the inner surface of the discharge port 4 which intersects a longitudinal direction of the rectangular shape of the discharge port.
  • the protruding portion 15 extends along the opening edge 4a. In other words, the protruding portion 15 extends in the longitudinal direction of the discharge port 4.
  • a cross-sectional shape of the protruding portion 15 seen from an extending direction of the protruding portion 15 is substantially square.
  • the protruding portion 15 includes a parallel surface 16 parallel to the inner surface of the discharge port 4, an upstream side surface 17 connecting an edge side of the parallel surface 16 on the upstream side F1 with the inner surface of the discharge port 4, and a downstream side surface 18 connecting an edge side of the parallel surface 16 on the downstream side F2 with the inner surface of the discharge port 4.
  • the parallel surface 16 and the downstream side surface 18 are substantially orthogonal to each other.
  • the parallel surface 16 and the upstream side surface 17 are substantially orthogonal to each other.
  • a height H of the protruding portion 15 from the inner surface (the third surface 13) is 5 mm.
  • a distance D of the protruding portion 15 from the opening edge 4a is 40 mm.
  • the height H of the protruding portion 15 from the inner surface (the third surface 13) and the distance D of the protruding portion 15 from the opening edge 4a can be appropriately changed.
  • the conditioned air CA (cold air) generated by the heat exchanger and the blower fan (not illustrated) flows along the inner surface of the discharge port 4.
  • the conditioned air CA which has flowed along the inner surface of the discharge port 4 from the upstream side F1 separates from the inner surface by colliding with the protruding portion 15. That is, the flow direction of the conditioned air CA changes, and the conditioned air CA deviates from an opening end of the inner surface. Alternatively, a flow velocity of the conditioned air CA at the opening edge 4a is slowed down.
  • the conditioned air CA flows toward an inside of the opening edge 4a.
  • the louver panel 8 becomes less likely to be cooled by the conditioned air CA.
  • the room air RA flows into the downstream side F2 of the protruding portion 15. Then, the room air RA that has flowed in and the conditioned air CA are mixed. Since the room air RA is warm, a surface temperature of surroundings (the louver panel 8) of the discharge port 4 increases.
  • the inventors performed analysis to examine the size and position of the protruding portion 15.
  • FIG. 5 is a graph illustrating a relationship between the height H (refer to FIG. 2 ) of the protruding portion 15 from the inner surface and the surface temperature around the discharge port 4.
  • the surface temperature gradually increases as the height H increases and reaches 27°C which is an atmospheric temperature at 5 mm. From this result, it was concluded that the height of the protruding portion 15 from the inner surface is preferably 2 mm to 15 mm. The height H of the protruding portion 15 from the inner surface can be appropriately changed within this range.
  • FIG. 6 is a graph illustrating a relationship between a distance D (refer to FIG. 2 ) of the protruding portion 15 from the opening edge 4a and the surface temperature around the discharge port 4. As illustrated in FIG. 6 , it was confirmed that the surface temperature around the discharge port 4 drops as the protruding portion 15 moves away from the opening edge 4a. The distance D of the protruding portion 15 from the opening edge 4a can be appropriately changed.
  • a width W (refer to FIG. 3 ) of the protruding portion 15 of the embodiment is set to about 2/3 of a width of the third surface 13 to avoid interference when the louver 5 is in the open position.
  • the protruding portion 15 may extend from the first surface 11 to the second surface 12.
  • the conditioned air CA flowing from the upstream side F1 of the protruding portion 15 is removed from the inner surface of the discharge port 4 by blowing to the protruding portion 15.
  • the room air RA is led into the discharge port 4 through the opening edge 4a, and thereby a temperature around the discharge port 4 increases. Accordingly, dew condensation around the discharge port 4 can be reduced.
  • the conditioned air CA intends to flow along a wall surface of the side end of the discharge port 4, and dew condensation easily occurs on the wall surface. Since the protruding portion 15 is protruded from the inner surfaces of the discharge port 4 (i.e. the pair of third surfaces 13) which intersects the longitudinal direction of the rectangular shape of the discharge port 4, the dew condensation on this inner surfaces can be particularly prevented.
  • the cross-sectional shape of the protruding portion 15 is a substantially square shape, but it is not limited thereto.
  • the protruding portion 15 may have any shape as long as the conditioned air CA flowing on the inner surface of the discharge port 4 can be separated from the inner surface.
  • the protruding portion 15 may have the shape illustrated in FIG. 7 .
  • a protruding portion 15B of a modified example may include the parallel surface 16 parallel to the inner surface of the discharge port 4, a downstream side surface 18 positioned between a downstream side end of the parallel surface 16 and the inner surface of the discharge port 4, and an upstream side surface 17B positioned between an upstream side end of the parallel surface 16 and the inner surface of the discharge port 4, and the upstream side surface 17B may be inclined with respect to the inner surface of the discharge port 4 toward a downstream side of the conditioned air CA as close to a top of the protruding portion.
  • the upstream side surface 17B and the inner surface are not orthogonal to each other, and the conditioned air CA flowing along the inner surface flows smoothly on the upstream side surface 17B and then separates from the inner surface.
  • the protruding portion 15 is provided only on the pair of third surfaces 13 of the inner surfaces, but the invention is not limited thereto, and the protruding portion 15 may be provided on the entire circumference of the inner surfaces.
  • the indoor unit 1 of the air conditioner in the above-described embodiment is the embedded type, but the present invention is not limited thereto and may also be applicable to a hanging type indoor unit.
  • cross-sectional shape of the discharge port 4 is not limited to a rectangular shape but may also be a circular shape or a polygonal shape.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
EP18169621.2A 2017-04-28 2018-04-26 Innenraumeinheit einer klimaanlage Withdrawn EP3396268A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017089842A JP2018189261A (ja) 2017-04-28 2017-04-28 空気調和機の室内機

Publications (1)

Publication Number Publication Date
EP3396268A1 true EP3396268A1 (de) 2018-10-31

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ID=62067550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18169621.2A Withdrawn EP3396268A1 (de) 2017-04-28 2018-04-26 Innenraumeinheit einer klimaanlage

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EP (1) EP3396268A1 (de)
JP (1) JP2018189261A (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161636A (ja) * 1983-03-07 1984-09-12 Matsushita Electric Ind Co Ltd 流れ方向制御装置
GB2293447A (en) * 1994-09-26 1996-03-27 Mitsubishi Electric Corp A device for directing the flow of forced air
WO2011040519A1 (ja) * 2009-09-30 2011-04-07 ダイキン工業株式会社 空気調和装置
JP2012251676A (ja) 2011-05-31 2012-12-20 Daikin Industries Ltd 空気調和機用室内機
WO2016067671A1 (ja) * 2014-10-31 2016-05-06 豊和化成株式会社 空気吹出装置
EP3017977A1 (de) * 2014-10-31 2016-05-11 Howa Plastics Co., Ltd. Luftausblasvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161636A (ja) * 1983-03-07 1984-09-12 Matsushita Electric Ind Co Ltd 流れ方向制御装置
GB2293447A (en) * 1994-09-26 1996-03-27 Mitsubishi Electric Corp A device for directing the flow of forced air
WO2011040519A1 (ja) * 2009-09-30 2011-04-07 ダイキン工業株式会社 空気調和装置
JP2012251676A (ja) 2011-05-31 2012-12-20 Daikin Industries Ltd 空気調和機用室内機
WO2016067671A1 (ja) * 2014-10-31 2016-05-06 豊和化成株式会社 空気吹出装置
EP3017977A1 (de) * 2014-10-31 2016-05-11 Howa Plastics Co., Ltd. Luftausblasvorrichtung

Also Published As

Publication number Publication date
JP2018189261A (ja) 2018-11-29

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