WO2019150691A1 - Climatiseur intégré au plafond - Google Patents

Climatiseur intégré au plafond Download PDF

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Publication number
WO2019150691A1
WO2019150691A1 PCT/JP2018/041452 JP2018041452W WO2019150691A1 WO 2019150691 A1 WO2019150691 A1 WO 2019150691A1 JP 2018041452 W JP2018041452 W JP 2018041452W WO 2019150691 A1 WO2019150691 A1 WO 2019150691A1
Authority
WO
WIPO (PCT)
Prior art keywords
shroud
heat exchanger
gap
blower
bell mouth
Prior art date
Application number
PCT/JP2018/041452
Other languages
English (en)
Japanese (ja)
Inventor
昌和 伊藤
Original Assignee
三菱重工サーマルシステムズ株式会社
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 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Priority to CN201890001506.6U priority Critical patent/CN212746683U/zh
Priority to EP18904199.9A priority patent/EP3748238A4/fr
Publication of WO2019150691A1 publication Critical patent/WO2019150691A1/fr
Priority to AU2020101540A priority patent/AU2020101540A4/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • 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
    • F24F1/0022—Centrifugal or radial fans
    • 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
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • 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

Definitions

  • the present invention relates to a ceiling-embedded air conditioner.
  • the indoor unit of the ceiling-embedded air conditioner is provided with a centrifugal blower inside, and a bell mouth is provided on the lower surface with the diameter of the opening decreasing upward and inward from the suction port.
  • a drain pan for receiving water that has condensed and dripped on the surface of the heat exchanger during cooling operation is installed.
  • Centrifugal blower has an impeller connected to a rotating shaft.
  • the impeller is connected to the hub (main plate) installed at the top and connected to the rotating shaft, a plurality of blades whose one end is connected to the hub and the other end is connected to the shroud, and the other ends of the blades.
  • a shroud having a diameter that extends upward and outward from the bellmouth side is provided.
  • the drain pan is provided with two side walls (wall portions) so as to face the inside and the outside of the heat exchanger.
  • An end portion on the blowout side of the shroud is located above the inner peripheral wall portion installed on the inner side with respect to the heat exchanger of the drain groove, and a gap is provided between the drain groove and the shroud.
  • a gap is provided between the shroud suction side and the bell mouth, and a gap is provided between the shroud outlet side and the inner peripheral wall portion of the drain groove.
  • This invention is made
  • the ceiling-embedded air conditioner includes a heat exchanger and a shroud that is cylindrical and has a diameter that increases upward and outward, and is installed inside the heat exchanger.
  • the ratio of the second gap B between the blow-side end of the shroud and the inner side wall of the drain groove to the heat exchanger with respect to the first gap A between the end and the suction-side end of the shroud Is B / A ⁇ 3 or 10 ⁇ B / A.
  • the drain groove may have a height of the inner side wall higher than that of the outer side wall with respect to the heat exchanger.
  • FIG. 2 is a longitudinal sectional view taken along line II-II in FIG. It is a top view which shows the drain pan which concerns on one Embodiment of this invention. It is a partial expanded longitudinal cross-sectional view which shows the indoor unit of the ceiling embedded type air conditioner which concerns on one Embodiment of this invention.
  • the ceiling-embedded air conditioner (hereinafter referred to as “air conditioner”) is a refrigerant pipe (not shown) that connects the indoor unit 1, an outdoor unit (not shown), the indoor unit 1 and the outdoor unit. Etc.
  • the indoor unit 1 is installed with a case body 2 embedded in a ceiling.
  • a heat exchanger 7, a drain pan 10, a motor 5, a blower 6, a bell mouth 12, and the like are built in the case body 2, and the lower part of the case body 2 is exposed on the ceiling surface.
  • a ceiling panel 8 is mounted.
  • FIG. 1 is a bottom view of the indoor unit 1 as seen from the indoor side, that is, as seen from the bottom surface of the indoor unit 1
  • FIG. 2 is a vertical cross-sectional view taken along the line II-II in FIG.
  • the blower 6 is a centrifugal blower and has an impeller 22 connected to the rotating shaft 21.
  • the impeller 22 includes a hub (main plate) 23 installed on the upper part and connected to the rotary shaft 21, a plurality of blades 24 having one end connected to the hub 23 and the other end connected to the shroud 25, The other ends are connected to each other, and a shroud 25 having a diameter that extends upward and outward from the bell mouth 12 side is provided.
  • the shroud 25 has a cylindrical shape, and the upper radius is larger than the lower radius, and the radius gradually increases from the lower radius to the upper radius.
  • An end portion on the suction side of the shroud 25, that is, a lower end portion is located on the outer peripheral side of the bell mouth 12, and a gap is provided between the shroud 25 and the bell mouth 12.
  • the blower side end portion, that is, the upper end portion of the shroud 25 is located above the inner peripheral wall portion 18a of the drain groove 18, and a gap is provided between the inner peripheral wall portion 18a.
  • the bell mouth 12 is a cylindrical member, and is installed below the shroud 25 and on the suction side of the blower 6.
  • the bell mouth 12 has an upper radius smaller than a lower radius and gradually decreases from the lower radius to the upper radius.
  • the upper end portion of the bell mouth 12 is housed inside the end portion on the suction side of the shroud 25.
  • the drain pan 10 is provided at the lower part of the heat exchanger 7 and receives drain water dripped from the heat exchanger 7.
  • the bell mouth 12 is provided below the drain pan 10.
  • a suction port 3 is formed at the center of the lower surface of the indoor unit 1, and a blowout port 4 is formed along the outer periphery of the lower surface of the indoor unit 1 adjacent to the suction port 3.
  • a suction grill 11 and a filter 13 are installed above the suction grill 11 at the suction port 3.
  • the drain pan 10 is made of, for example, styrene foam, and a waterproof paint is applied to the surface where the drain water is stored. As shown in FIG. 3, the shape of the drain pan 10 in plan view is substantially a quadrangle. Openings 16 and 17 are formed in the drain pan 10 corresponding to the suction port 3 and the blowout port 4. The bottom portion 10 a of the drain pan 10 is provided over the entire region where the heat exchanger 7 is installed along the lower portion of the heat exchanger 7 disposed so as to surround the blower 6.
  • FIG. 3 is a plan view showing the drain pan 10.
  • the drain pan 10 is formed with a concave drain groove 18, and drain water accumulates inside the drain groove 18.
  • the drain groove 18 is located on the inner side of the heat exchanger 7, that is, on the inner peripheral wall portion 18 a formed on the inlet side of the heat exchanger 7, and on the heat exchanger 7. It has the outer peripheral wall part 18b formed in the outer side, ie, the exit side of the heat exchanger 7.
  • the inner peripheral wall portion 18 a is provided along the opening 16 formed corresponding to the suction port 3.
  • the outer peripheral wall portion 18 b is provided along the opening portion 17 formed corresponding to the outlet 4.
  • the drain groove 18 accommodates the lower part of the heat exchanger 7, and the height position of the lower end of the heat exchanger 7 is lower than the upper end of the drain groove 18. Thereby, the outer peripheral wall portion 18b of the drain groove 18 prevents the drain water adhering to the lower portion of the heat exchanger 7 from being scattered outside.
  • the bottom 10a of the drain pan 10 is formed with a convex portion 19 protruding upward.
  • the heat exchanger 7 is placed on the upper surface of the convex portion 19.
  • the convex portion 19 is formed along the bottom surface of the heat exchanger 7 so as to correspond to the shape of the bottom surface of the heat exchanger 7 so that a gap between the convex portion 19 and the heat exchanger 7 is not formed as much as possible.
  • the bottom 10a is preferably formed at a position where the outer bottom 10a is lower than the inner bottom 10a with respect to the heat exchanger 7, as shown in FIG.
  • the water accumulated in the drain pan 10 is easily guided from the inside to the outside with respect to the heat exchanger 7.
  • the blower 6 is disposed on the inner side with respect to the heat exchanger 7, and the flow of the wind by the blower 6 is directed from the inner side to the outer side with respect to the heat exchanger 7, so that it accumulates in the drain pan 10.
  • the drain water is also easily discharged from the inside to the outside with respect to the heat exchanger 7 by wind power.
  • an insulation 20 is installed between the lower part of the heat exchanger 7 and the upper surface of the convex part 19.
  • the insulation 20 is installed between the lower portion of the heat exchanger 7 and the upper surface of the convex portion 19, it is accommodated in the drain groove 18. For this reason, the drain water dripped from the heat exchanger 7 and adhered to the insulation 20 is also prevented from scattering to the outside.
  • the ratio of the second gap B is B / A ⁇ 3 or 10 ⁇ B / A.
  • FIG. 5 is a graph showing the relationship between the sound pressure level (dB) of the sound generated by the air flow and B / A. According to the inventors, when B / A ⁇ 3 or 10 ⁇ B / A, as shown in FIG. 5, the result that the sound pressure level is reduced as compared with the case where 3 ⁇ B / A ⁇ 10 is obtained. It has been. In particular, it has been confirmed that sound having a frequency around 1 kHz is reduced.
  • the first gap A between the upper end portion of the bell mouth 12 and the suction side end portion of the shroud 25 becomes relatively narrow.
  • the air sucked by the blower 6 is less likely to pass through the gap between the bell mouth 12 and the shroud 25, and passes more on the blade 24 side than the shroud 25. Therefore, as compared with the case of 3 ⁇ B / A, air that does not pass through the wing 24 side with respect to the shroud 25 but bypasses the wing 24 side and passes through the gap between the bell mouth 12 and the shroud 25. Therefore, noise is reduced.
  • the height of the inner peripheral wall portion 18a is higher than the height of the outer peripheral wall portion 18b as in the example shown in FIG. Thereby, the distance of the edge part of the blowing side of the shroud 25 and the upper edge part of the inner peripheral wall part 18a can be shortened.
  • the sound pressure level is higher than when 1 ⁇ B / A ⁇ 3, or the contact due to vibration of the bell mouth 12 and the shroud 25 or the like. In consideration of avoiding the above, it is desirable that 1 ⁇ B / A.
  • the second gap B between the blowout side end portion of the shroud 25 and the inner peripheral wall portion 18a of the drain groove 18 becomes relatively wide.
  • the air is less likely to stagnate on the lower side of the shroud 25, and the airflow is separated. Is unlikely to occur. Therefore, compared with the case where 3 ⁇ B / A ⁇ 10, the air flows below the shroud 25 and the airflow is less likely to be separated, so that noise is reduced.
  • the sound pressure level is reduced in the range of 10 ⁇ B / A ⁇ 20.
  • the outlet side end portion of the shroud 25 and the inner peripheral wall portion 18 a of the drain groove 18 with respect to the first gap A between the upper end portion of the bell mouth 12 and the suction side end portion of the shroud 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention a pour objet de réduire le bruit produit par l'air aspiré ou soufflé par une soufflante. À cet effet, un climatiseur intégré au plafond comprend : un échangeur de chaleur (7) ; une soufflante (6) disposée à l'intérieur par rapport à l'échangeur de chaleur (7), et comportant une enveloppe tubulaire (25) dont le diamètre augmente vers l'extérieur ; un évasement (12) disposé au-dessous de l'enveloppe (25) et du côté aspiration de la soufflante (6) ; et un bac de récupération (10) comportant une rainure de récupération évidée (18) dans laquelle une partie inférieure de l'échangeur de chaleur (7) est logée. Le rapport entre un second écartement B entre l'extrémité côté évacuation de l'enveloppe (25) et une partie paroi périphérique interne (18a) sur l'intérieur de la rainure de récupération (18) par rapport à l'échangeur de chaleur (7), et un premier écartement A entre l'extrémité supérieure de l'évasement (12) et l'extrémité côté aspiration de l'enveloppe (25), est égal à B/A ≤ 3 ou à 10 ≤ B/A.
PCT/JP2018/041452 2018-01-30 2018-11-08 Climatiseur intégré au plafond WO2019150691A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201890001506.6U CN212746683U (zh) 2018-01-30 2018-11-08 天花板嵌入式空调
EP18904199.9A EP3748238A4 (fr) 2018-01-30 2018-11-08 Climatiseur intégré au plafond
AU2020101540A AU2020101540A4 (en) 2018-01-30 2020-07-28 Ceiling-cassette air conditioner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-013680 2018-01-30
JP2018013680A JP7278710B2 (ja) 2018-01-30 2018-01-30 天井埋込み型空気調和機

Related Child Applications (1)

Application Number Title Priority Date Filing Date
AU2020101540A Division AU2020101540A4 (en) 2018-01-30 2020-07-28 Ceiling-cassette air conditioner

Publications (1)

Publication Number Publication Date
WO2019150691A1 true WO2019150691A1 (fr) 2019-08-08

Family

ID=67478745

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/041452 WO2019150691A1 (fr) 2018-01-30 2018-11-08 Climatiseur intégré au plafond

Country Status (4)

Country Link
EP (1) EP3748238A4 (fr)
JP (1) JP7278710B2 (fr)
CN (1) CN212746683U (fr)
WO (1) WO2019150691A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000009327A (ja) * 1998-06-19 2000-01-14 Fujitsu General Ltd 天井埋込型空気調和機
JP2002235930A (ja) 2001-02-09 2002-08-23 Daikin Ind Ltd 空気調和機
JP2010138700A (ja) * 2008-12-09 2010-06-24 Daikin Ind Ltd 遠心送風機
JP2015114089A (ja) * 2013-12-16 2015-06-22 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 天井埋込型室内機及びそれを用いた空気調和機
JP2016011827A (ja) * 2014-06-05 2016-01-21 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 天井埋込型室内機及びそれを用いた空気調和機
WO2016084216A1 (fr) * 2014-11-28 2016-06-02 日立アプライアンス株式会社 Unité intérieure pour conditionneur d'air
WO2017006467A1 (fr) * 2015-07-08 2017-01-12 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー （ホンコン） リミテッド Unité intérieure pour climatiseur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11101194A (ja) * 1997-09-30 1999-04-13 Daikin Ind Ltd 遠心送風機及び該遠心送風機を備えた空気調和機
WO2004055380A1 (fr) * 2002-12-16 2004-07-01 Daikin Industries, Ltd. Soufflante centrifuge et climatiseur pourvu de celle-ci
KR100782195B1 (ko) * 2006-08-10 2007-12-04 엘지전자 주식회사 공기 조화기
JP2013108684A (ja) 2011-11-22 2013-06-06 Hitachi Appliances Inc 空気調和機の室内機
JP5641089B2 (ja) * 2013-04-30 2014-12-17 ダイキン工業株式会社 化粧パネル及びそれを備えた空気調和機の室内ユニット
JP2017215091A (ja) * 2016-05-31 2017-12-07 日立ジョンソンコントロールズ空調株式会社 空気調和機の室内機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000009327A (ja) * 1998-06-19 2000-01-14 Fujitsu General Ltd 天井埋込型空気調和機
JP2002235930A (ja) 2001-02-09 2002-08-23 Daikin Ind Ltd 空気調和機
JP2010138700A (ja) * 2008-12-09 2010-06-24 Daikin Ind Ltd 遠心送風機
JP2015114089A (ja) * 2013-12-16 2015-06-22 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 天井埋込型室内機及びそれを用いた空気調和機
JP2016011827A (ja) * 2014-06-05 2016-01-21 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 天井埋込型室内機及びそれを用いた空気調和機
WO2016084216A1 (fr) * 2014-11-28 2016-06-02 日立アプライアンス株式会社 Unité intérieure pour conditionneur d'air
WO2017006467A1 (fr) * 2015-07-08 2017-01-12 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー （ホンコン） リミテッド Unité intérieure pour climatiseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3748238A4

Also Published As

Publication number Publication date
EP3748238A1 (fr) 2020-12-09
CN212746683U (zh) 2021-03-19
JP7278710B2 (ja) 2023-05-22
EP3748238A4 (fr) 2021-10-20
JP2019132475A (ja) 2019-08-08

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