EP2933574A1 - Innenraumeinheit einer klimaanlage - Google Patents

Innenraumeinheit einer klimaanlage Download PDF

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Publication number
EP2933574A1
EP2933574A1 EP13862810.2A EP13862810A EP2933574A1 EP 2933574 A1 EP2933574 A1 EP 2933574A1 EP 13862810 A EP13862810 A EP 13862810A EP 2933574 A1 EP2933574 A1 EP 2933574A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
air
indoor unit
dew condensation
drain
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.)
Granted
Application number
EP13862810.2A
Other languages
English (en)
French (fr)
Other versions
EP2933574A4 (de
EP2933574B1 (de
Inventor
Seiji Hirakawa
Takuya Niimura
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 Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP2933574A1 publication Critical patent/EP2933574A1/de
Publication of EP2933574A4 publication Critical patent/EP2933574A4/de
Application granted granted Critical
Publication of EP2933574B1 publication Critical patent/EP2933574B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—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
    • 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
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow

Definitions

  • the present invention relates to an indoor unit of an air-conditioning apparatus, and particularly relates to the shape of a nozzle.
  • Patent Literature 1 Japanese Unexamined Patent Application Publication No. 2006-300431 (e.g., see Fig. 1 ).
  • the drain pan has substantially a U cross-sectional shape, dew condensation water generated during cooling operation or dehumidifying operation accumulates in the drain pan and the lower portion of the heat exchanger is likely to be immersed in the water. Thus, if the amount of dew condensation is large, the lower portion of the heat exchanger is immersed in water, causing a decrease in heat exchange efficiency.
  • the drain pan heat insulating member is disposed along the inner wall of the drain pan body, the drain pan heat insulating member is required to have the same area as that of the inner wall of the drain pan body. This increases the cost.
  • the present invention has been made in order to solve the problem described above, and an object of the present invention is to provide an indoor unit of an air-conditioning apparatus which indoor unit prevents a lower portion of a heat exchanger from being immersed in water to decrease heat exchange efficiency.
  • An indoor unit of an air-conditioning apparatus includes: a fan; a heat exchanger provided so as to surround an upper side and a front side of the fan; and a nozzle located below the heat exchanger located at the front side of the fan, the nozzle being provided to face the fan.
  • the nozzle includes: a drain pan configured to receive dew condensation water generated at the heat exchanger; and a drain groove into which the dew condensation water flows.
  • the drain groove into which the dew condensation water generated at the heat exchanger flows is formed in the nozzle, it is possible to prevent a lower portion of the heat exchanger from being immersed in water to decrease heat exchange efficiency.
  • Fig. 1 is a cross-sectional view of an indoor unit of an air-conditioning apparatus according to Embodiment of the present invention
  • Fig. 2 is a perspective view of the entirety of the indoor unit of an air-conditioning apparatus according to Embodiment of the present invention.
  • the indoor unit 1 of an air-conditioning apparatus includes air inlets 4 which are provided at a front upper side and surrounded by a design grille 2 and a panel 3.
  • the indoor unit 1 includes an air outlet 6 which is provided at a front lower side and has an opening which is regulated in direction and size by a vertical wind direction variable vane 5.
  • a wind path is formed within the indoor unit 1 so as to extend from the air inlets 4 to the air outlet 6.
  • a pre-filter 7 which removes foreign matter in air in a room, a heat exchanger 8 which exchanges heat with air in the room, a cross-flow fan 9, and a lateral wind direction variable vane 15 are provided.
  • An air suction wind path 10 is formed at the upstream side (upper side) of the cross-flow fan 9 so as to be surrounded by the heat exchanger 8 and the cross-flow fan 9, and a blowout wind path 13 is formed at the downstream side (lower side) of the cross-flow fan 9 so as to be defined by a nozzle 11 and a box portion 12.
  • the lateral wind direction variable vane 15 is provided on the blowout wind path 13 and changes a wind direction laterally.
  • the pre-filter 7 is provided between the air inlets 4 and the heat exchanger 8 so as to cover the heat exchanger 8, and has a function to collect dust which has entered through the air inlets 4 together with air, before the dust enters the heat exchanger 8.
  • front heat exchanger 8a a portion located in front of the cross-flow fan 9 is referred to as front heat exchanger 8a.
  • nozzle 11 (11 a to 11 e) and a stabilizer 14 (14a to 14h) will be described later.
  • Fig. 3 is a schematic view of a principal part of the indoor unit of an air-conditioning apparatus according to Embodiment of the present invention.
  • the nozzle 11 is located below the front heat exchanger 8a and extends from the design grille 2 toward the cross-flow fan 9.
  • the upper surface (the heat exchanger 8 side) of the nozzle 11 forms a drain pan 11 a from a portion thereof located substantially directly below the front heat exchanger 8a toward the cross-flow fan 9, and receives dew condensation water generated at the heat exchanger 8 during cooling operation or dehumidifying operation.
  • a portion of the drain pan 11 a is provided with a nozzle projection 11 d which projects toward the front heat exchanger 8a located at the upper side.
  • the nozzle projection 11d is provided so as to ensure a desired distance between the nozzle 11 and the front heat exchanger 8a to make a lower portion of the front heat exchanger 8a less likely to be immersed in dew condensation water dropped on the drain pan 11 a, and also serves as a mark for positioning a later-described cushioning material when the cushioning material is attached between the drain pan 11 a and the front heat exchanger 8a.
  • a drain groove 11 e which is formed so as to project downward and into which dew condensation water dropped on the drain pan 11 a flows. That is, the drain pan 11 a and the drain groove 11 e are continuously formed by the upper surface of the nozzle 11, and the drain pan 11 a is located at the cross-flow fan 9 side with respect to the drain groove 11 e. Dew condensation water is caused to flow from the drain pan 11 a to the drain groove 11 e and accumulate therein. This causes the lower portion of the front heat exchanger 8a to be less likely to be immersed in water. Thus, the drain pan 11 a is inclined downward toward the drain groove 11e in order that dew condensation water dropped thereon easily flows into the drain groove 11e.
  • a nozzle cover 11 c is mounted at the lower surface of the nozzle 11 (at the side opposite to the heat exchanger 8) via an air layer 11 b and forms a part of the blowout wind path 13.
  • the air layer 11 b is present between the drain pan 11 a and the nozzle cover 11 c and serves as a heat insulating layer. Therefore, even when the drain pan 11a is cooled by dew condensation water generated at the heat exchanger 8, the nozzle cover 11c is less likely to cause dew condensation thereon.
  • Embodiment since there is the drain groove 11 e, it is simply necessary to attach a heat insulating material or the like only on the back surface of the drain groove 11 e, thereby decreasing the area where the heat insulating material or the like is attached as compared to the case without the drain groove 11 e. Thus, it is possible to take a countermeasure against scattering of dew while reducing the cost.
  • the stabilizer 14 is provided on a surface of the nozzle 11 that is opposed to the cross-flow fan 9, and along a portion of the outer periphery of the cross-flow fan 9.
  • An end portion 14b is provided at the boundary between the stabilizer 14 and the nozzle 11, and a projection 14a is provided at a portion extending downward from the end portion 14b along the outer periphery of the cross-flow fan 9 and determines a minimum distance from the cross-flow fan 9.
  • a first recess portion 14c is formed between the projection 14a and the end portion 14b so as to be continuous in the longitudinal direction of the cross-flow fan 9 and have a recess shape.
  • a second recess portion 14d is formed at a lower portion of the first recess portion 14c so as to be continuous in the longitudinal direction of the cross-flow fan 9 and have a recess shape.
  • Fig. 4 is a perspective view of the stabilizer of the indoor unit of an air-conditioning apparatus according to Embodiment of the present invention
  • Fig. 5 is an enlarged view of a principal part of Fig. 4 .
  • the stabilizer 14 is provided with an R portion 14g which is curved so as to be convex toward the cross-flow fan 9, and a plurality of vertical grooves 14e are formed in the R portion 14g so as to be aligned in the longitudinal direction of the cross-flow fan 9.
  • Vertical groove ribs 14f are provided in the plurality of vertical grooves 14e such that their positions are regularly varied along the outer periphery of the cross-flow fan 9 in an oblique direction.
  • Third recess portions 14h are formed by the vertical groove ribs 14f partially filling the vertical grooves 14e.
  • a refrigerant becomes a high-temperature and high-pressure refrigerant by a compressor which is not shown and then is discharged therefrom.
  • the refrigerant becomes a low-temperature and low-pressure refrigerant by flowing through a condenser and an expansion valve which are not shown, and then flows into the heat exchanger 8.
  • the cross-flow fan 9 rotates, dust is removed by the pre-filter 7 from air in the room that has been sucked through the air inlets 4, and then the air flows into the heat exchanger 8.
  • the user is allowed to set the positions of the vertical wind direction variable vane 5 and the lateral wind direction variable vane 15 manually or automatically with the remote controller.
  • the drain hose mount portion 16 is present at both left and right sides, a drain hose is connected to either one of the drain hose mount portions 16 depending on an installation environment, and a rubber stopper is connected to the other drain hose mount portion 16. If the indoor unit 1 is inclined laterally due to distortion of a wall surface on which the indoor unit 1 is installed, deformation of a mount metal fitting, an improper installation operation, or the like, the drain hose mount portion 16 to which the drain hose is connected may be located at a higher position than the lowest point of the drain groove 11e. If so, dew condensation water stored in the drain groove 11e is not discharged to the outside through the drain hose.
  • the lower portion of the front heat exchanger 8a is not immersed in dew condensation water.
  • the air in the room is allowed to pass also through the lower portion of the front heat exchanger 8a, and the heat exchange efficiency is not decreased during cooling operation and during dehumidifying operation.
  • the boundary between the drain groove 11e and the drain pan 11a has a shape curved so as to be convex toward the front heat exchanger 8a, when dew condensation water flows through the drain groove 11e, the dew condensation water flows along the surface of the curved shape. Thus, it is possible to make it less likely to generate dropping sound produced by dropped dew condensation water and water stored in the drain groove 11e when the dew condensation water drops to the drain groove 11e.
  • the boundary between the drain groove 11e and the drain pan 11a is located directly below the front heat exchanger 8a, and thus a portion of the drain groove 11e is also located directly below the front heat exchanger 8a. Therefore, the boundary between the drain groove 11 e and the drain pan 11 a is located at the design grille 2 side with respect to the position directly below the heat exchanger 8, and the drain groove 11 e is formed such that there is no portion of the drain groove 11 e that is located directly below the front heat exchanger 8a. Accordingly, it is possible to prevent dew condensation water from dropping from the front heat exchanger 8a directly to the drain groove 11e. As a result, it is possible to make it further less likely to generate dropping sound.
  • the gap between the drain pan 11a and the front heat exchanger 8a (or the nozzle projection 11 d) is opened wide, the volume of high-temperature humid air that does not flow through the heat exchanger 8 and passes through the gap from the front side of the indoor unit 1 to the back side thereof (hereinafter, referred to as secondary air) is increased. Then, the secondary air is cooled when passing through the end portion 14b of the stabilizer 14, generating dew condensation water on the end portion 14b. If the volume of the dew condensation water is increased, the dew condensation water overflows from the end portion 14b to the vicinity of the air outlet 6, and dew is scattered into the room by wind blown out from the air outlet 6.
  • the gap between the drain pan 11a and the front heat exchanger 8a may be sealed by a cushioning material interposed therebetween.
  • the volume of the secondary air is decreased, thus it is possible to reduce the volume of dew condensation water which is generated on the end portion 14b, and dew condensation water is less likely to overflow from the end portion 14b. Therefore, it is possible to prevent occurrence of scattering of dew.
  • the first recess portion 14c is formed between the projection 14a and the end portion 14b so as to be continuous in the longitudinal direction of the cross-flow fan 9, the first recess portion 14c is able to receive the dew condensation water. Furthermore, since the recess-shaped second recess portion 14d is formed at the lower portion of the first recess portion 14c so as to be continuous in the longitudinal direction of the cross-flow fan 9, even if dew condensation water overflows from the first recess portion 14c, the second recess portion 14d is able to receive the dew condensation water.
  • the plurality of vertical grooves 14e are formed in the R portion 14g
  • the vertical groove ribs 14f are provided in the plurality of vertical grooves 14e such that their positions are regularly varied along the outer periphery of the cross-flow fan 9 in the oblique direction
  • the third recess portions 14h are formed by the vertical groove ribs 14f partially filling the vertical grooves 14e.
  • the third recess portions 14h are also able to receive overflowing dew condensation water.
  • the stabilizer 14 has three types of recess portions, the first recess portion 14c, the second recess portion 14d, and the third recess portions 14h, and is structured to triply receive dew condensation water.
  • dew condensation water stored in the three types of recess portions evaporates during low-load operation or during stop of operation.
  • the stabilizer 14 since the stabilizer 14 has three types of recess portions, the three types of recess portions are able to store dew condensation water generated within the indoor unit 1 during cooling operation or during dehumidifying operation, and the dew condensation water is prevented from dropping to the vicinity of the air outlet 6. Thus, it is possible to prevent occurrence of scattering of dew into the room caused by wind blown out from the air outlet 6.
  • the gap between the drain pan 11 a and the front heat exchanger 8a (or the nozzle projection 11 d) is made equal to or less than 2 mm, the volume of the secondary air is decreased, the volume of dew condensation water generated on the end portion 14b is decreased, and dew condensation water is made less likely to overflow from the end portion 14b. Thus, it is possible to prevent occurrence of scattering of dew.
  • the nozzle cover 11c is mounted at the lower surface of the nozzle 11 via the air layer 11 b, whereby the air layer 11 b between the drain pan 11 a and the nozzle cover 11c becomes a heat insulating layer.
  • the air layer 11 b between the drain pan 11 a and the nozzle cover 11c becomes a heat insulating layer.
  • the drain pan 11 a and the drain groove 11 e are formed in the nozzle 11, and the drain pan 11a is inclined downward toward the drain groove 11e, so that dew condensation water is caused to flow from the drain pan 11a into the drain groove 11 e and accumulate therein. This causes the lower portion of the front heat exchanger 8a to be less likely to be immersed in water.
  • the boundary between the drain groove 11e and the drain pan 11a has a shape curved so as to be convex toward the front heat exchanger 8a, dew condensation water flows along the surface of the curved shape. Thus, it is possible to make it less likely to generate dropping sound when dew condensation water drops to the drain groove 11e.
  • the drain groove 11 e is formed such that there is no portion of the drain groove 11e that is located directly below the heat exchanger 8, whereby it is possible to prevent dew condensation water from dropping from the heat exchanger 8 directly to the drain groove 11 e, and it is possible to make it further less likely to generate dropping sound.
  • a heat transfer tube which is not shown may be formed of aluminum.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
EP13862810.2A 2012-12-13 2013-09-03 Innenraumeinheit einer klimaanlage Active EP2933574B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012272281A JP2014119131A (ja) 2012-12-13 2012-12-13 空気調和機の室内機
PCT/JP2013/073632 WO2014091803A1 (ja) 2012-12-13 2013-09-03 空気調和機の室内機

Publications (3)

Publication Number Publication Date
EP2933574A1 true EP2933574A1 (de) 2015-10-21
EP2933574A4 EP2933574A4 (de) 2016-08-24
EP2933574B1 EP2933574B1 (de) 2019-01-09

Family

ID=50768128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13862810.2A Active EP2933574B1 (de) 2012-12-13 2013-09-03 Innenraumeinheit einer klimaanlage

Country Status (5)

Country Link
US (1) US20150300681A1 (de)
EP (1) EP2933574B1 (de)
JP (1) JP2014119131A (de)
CN (2) CN103868150A (de)
WO (1) WO2014091803A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014119131A (ja) * 2012-12-13 2014-06-30 Mitsubishi Electric Corp 空気調和機の室内機
JP6070734B2 (ja) * 2015-01-30 2017-02-01 ダイキン工業株式会社 空調室内機
EP3578899B1 (de) * 2017-04-14 2021-09-22 Mitsubishi Electric Corporation Innenraumeinheit für klimaanlage
JP6349011B1 (ja) * 2017-04-28 2018-06-27 日立ジョンソンコントロールズ空調株式会社 空気調和機
DE112019006837T5 (de) * 2019-02-07 2021-10-21 Mitsubishi Electric Corporation Inneneinheit einer klimaanlage und klimaanlage
CN112303763B (zh) * 2020-10-30 2021-10-01 北京理工大学 一种自适应防结露的半导体辐射空调
CN115763934B (zh) * 2022-11-17 2023-11-03 东莞光亚智能科技有限公司 一种电池化成分容设备及其冷却方法

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JP2014119131A (ja) * 2012-12-13 2014-06-30 Mitsubishi Electric Corp 空気調和機の室内機

Also Published As

Publication number Publication date
EP2933574A4 (de) 2016-08-24
CN103868150A (zh) 2014-06-18
JP2014119131A (ja) 2014-06-30
US20150300681A1 (en) 2015-10-22
CN203615486U (zh) 2014-05-28
EP2933574B1 (de) 2019-01-09
WO2014091803A1 (ja) 2014-06-19

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