EP1701041A2 - Climatiseur - Google Patents

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Publication number
EP1701041A2
EP1701041A2 EP06002266A EP06002266A EP1701041A2 EP 1701041 A2 EP1701041 A2 EP 1701041A2 EP 06002266 A EP06002266 A EP 06002266A EP 06002266 A EP06002266 A EP 06002266A EP 1701041 A2 EP1701041 A2 EP 1701041A2
Authority
EP
European Patent Office
Prior art keywords
air
tongue part
diffuser
fan
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.)
Withdrawn
Application number
EP06002266A
Other languages
German (de)
English (en)
Other versions
EP1701041A3 (fr
Inventor
Masahiro Atarashi
Hirokazu Sakai
Yoshikimi Tatsumu
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.)
Panasonic Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP1701041A2 publication Critical patent/EP1701041A2/fr
Publication of EP1701041A3 publication Critical patent/EP1701041A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/422—Discharge tongues
    • 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
    • F24F1/0018—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

Definitions

  • the present invention relates to an indoor unit of a separate type air conditioner.
  • an air conditioner illustrated in Fig. 6 is of a duct type or a ceiling-hung type, which is mounted for use to an overhead location such as a ceiling or a roof space.
  • a unit 101 has an air inlet 102 provided on its rearward bottom face, an air outlet 103 provided on its front face, and an air outlet 104 provided on its forward bottom face.
  • a casing 105 which incorporates a fan 105A therein, a fan motor 105B which drives the fan 105A, and a heat exchanger 106 are arranged in the unit 101.
  • the casing 105 has a spiral shape.
  • a diffuser which constitutes an air outlet part of the casing 105 has a tongue part located in the vicinity of the fan 105A, and an opening part extending from the tongue part toward the heat exchanger 106.
  • the diffuser of the casing is an important constituent element for converting airflow velocity energy into air pressure energy. If a length of the diffuser is long, the energy conversion amount becomes large and resultant air-blowing performance is excellent with high static pressure. Heretofore, there has been desired to further improve the air-blowing performance of the diffuser.
  • the present invention has been made to solve the aforementioned problem. It is therefore an object of the present invention to provide an air conditioner which can further promote a diffuser effect of a casing of an air blower and can provide high air-blowing performance with high static pressure.
  • the present invention provides an air conditioner comprising an indoor unit which includes an air inlet part, an air outlet part, and a partition plate for dividing the indoor unit into an air blower chamber and a heat exchanger chamber, the air blower chamber including a fan casing which incorporates a centrifugal fan therein, and a motor which drives the centrifugal fan.
  • a tongue part constituting a diffuser of the fan casing is formed from at least two arcs.
  • a shape of a tongue part which constitutes a diffuser makes it possible to extend a substantial length of the diffuser, to further promote a diffuser effect of a casing of an air blower, and to provide high air-blowing performance with high static pressure.
  • a tongue part constituting a diffuser of a fan casing is formed from at least two arcs.
  • an angle formed by lines tangent to both ends of each of the two arcs constituting the tongue part is obtuse.
  • the two arcs constituting the tongue part are connected by a curve.
  • the diffuser of the fan casing is formed to have a tongue shape so as to gradually enlarge from an upstream side toward a downstream side.
  • an air blower in which a relation between a diameter D of the centrifugal fan and the arc R1 constituting the tongue part falls within a range of 0.025 ⁇ R1/D ⁇ 0.11, and a relation between the diameter D of the centrifugal fan and the arc R2 constituting the tongue part falls within a range of 0.14 ⁇ R2/D ⁇ 0.22.
  • the tongue part is made of a porous material.
  • the tongue part is made of a porous material.
  • Fig. 1 is a sectional view of an air conditioner according to a first embodiment of the present invention. As illustrated in Fig. 1, an interior of an air conditioner main body 1 is divided by a partition plate 2 into an air blower chamber 3 and a heat exchanger chamber 4.
  • the air blower chamber 3 includes a fan casing 7 which incorporates a centrifugal fan 6 therein.
  • the centrifugal fan 6 is driven by a motor 8.
  • the air blower chamber 3 has an air inlet part 5 provided on its rearward bottom face. Through the air inlet part 5, air flows into the air blower chamber 3.
  • a tongue part 9 which constitutes a part of a diffuser 14 of the fan casing 7 is arranged on a boundary between the air blower chamber 3 and the heat exchanger chamber 4.
  • a main part of the diffuser 14 is arranged in the heat exchanger chamber 4.
  • a heat exchanger 10 supported on a side plate is arranged so as to oppose an opening part of the diffuser 14.
  • a drain pan 11 is provided beneath the heat exchanger 10.
  • the heat exchanger chamber 4 has, on its front face, an air outlet part 13 provided with a wind direction changer 12.
  • Fig. 2 is an enlarged view of a main part of the air conditioner according to first and second embodiments of the present invention.
  • the opening part of the diffuser 14 of the fan casing 7 is not partially illustrated.
  • Fig. 2 illustrates a comparison between the shape of the tongue part 9 constituting a part of the diffuser 14 and a shape of a conventional tongue part (broken line).
  • Fig. 3 illustrates the tongue part which is a main part of the air conditioner according to the embodiment of the present invention.
  • the tongue part 9 is formed from two arcs R1 and R2, and an angle ( ⁇ 1, ⁇ 2) formed by lines tangent to both ends of each of the arcs is obtuse (see Fig. 3).
  • This obtuse shape makes it possible to gradually enlarge the diffuser 14 and to extend the length of the tongue part 9 as much as possible.
  • the tongue part 9 has the following shape. That is, an additional arc portion having a radius R2 is provided on the air outlet side at a location spaced slightly away from an arc portion having a radius R1 provided in the vicinity of the centrifugal fan 6 having a diameter D, in comparison with a shape of a conventional tongue part indicated by a broken line.
  • the arc R1 suppresses separation and reverse flow of air toward the air inlet side, and the static pressure of the air is increased while the air flows along the tongue part 9 which is substantially longer than the conventional tongue part.
  • the air flows along the diffuser 14 which is smoothly enlarged by the arc R2, so that a diffuser effect is further promoted.
  • the tongue part 9 constituting the diffuser 14 of the fan casing 7 is formed from the at least two arcs R1 and R2.
  • the diffuser 14 it is possible to extend a substantial length of the diffuser 14, to further promote a diffuser effect of the fan casing 7 of an air blower, and to realize high air-blowing performance with high static pressure.
  • the angle formed by lines tangent to both ends of each of the two arcs R1 and R2 constituting the tongue part 9 is obtuse.
  • the two arcs R1 and R2 constituting the tongue part 9 are connected by a curve.
  • the tongue part 9 having the at least two arcs R1 and R2 gradually enlarges together with the diffuser 14 from an upstream side toward a downstream side. More specifically, an angle ⁇ 1 on the upstream side, which is formed by lines tangent to both ends of the arc R1 constituting the tongue part 9, is smaller than an angle ⁇ 2 on the downstream side, which is formed by lines tangent to both ends of the arc R2 constituting the tongue part 9.
  • the tongue part 9 gradually enlarges from the upstream side toward the downstream side.
  • Fig. 4A is a graph which shows a change in centrifugal fan efficiency with respect to a ratio between the diameter D of the centrifugal fan 6 and the arc radius R1 of the tongue part 9 according to the present invention
  • Fig. 4B is a graph which shows a change in centrifugal fan efficiency with respect to a ratio between the diameter D of the centrifugal fan 6 and the arc radius R2 of the tongue part 9. From results of these graphs, a range of R1/D is optimally set to 0.025 ⁇ R1/D ⁇ 0.11 and a range of R2/D is optimally set to 0.14 ⁇ R2/D ⁇ 0.22, so that it is possible to design an air blower capable of maintaining high efficiency.
  • the diffuser is further enlarged by the R2 portion. Therefore, in case of R2/D ⁇ 0.14, the diffuser is suddenly enlarged at the R2 portion, so that there is a possibility of separation of airflow. In case of R2/D > 0.22, the length of the diffuser becomes short, so that there is a possibility of reduction of efficiency.
  • an air blower in which a relation between the diameter D of the centrifugal fan 6 and the arc R1 constituting the tongue part 9 falls within a range of 0.025 ⁇ R1/D ⁇ 0.11, and a relation between the diameter D of the centrifugal fan 6 and the arc R2 constituting the tongue part 9 falls within a range of 0.14 ⁇ R2/D ⁇ 0.22.
  • Fig. 5 is an enlarged view of a main part of the air blower chamber 3 according to a fourth embodiment of the present invention.
  • a tip end of the tongue part 9 is made of a porous material 15.
  • This tongue part 9 is made of the porous material 15 while maintaining the arcs R1 and R2 of the tongue part 9 according to the first embodiment.
  • the use of the porous material 15 makes it possible to suppress pressure pulsation of air in the proximity of the tongue part 9, thereby to reduce noise.
  • the present invention since a tongue part which constitutes a diffuser of a fan casing is formed from at least two arcs, it is possible to extend a substantial length of the diffuser, to further promote a diffuser effect of the fan casing of an air blower, and to realize high air-blowing performance with high static pressure. Therefore, the present invention is applicable to not only equipment related to air conditioning, but also various equipment using a centrifugal fan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP06002266A 2005-02-04 2006-02-03 Climatiseur Withdrawn EP1701041A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005028755 2005-02-04
JP2006009340A JP2006242554A (ja) 2005-02-04 2006-01-18 空気調和機

Publications (2)

Publication Number Publication Date
EP1701041A2 true EP1701041A2 (fr) 2006-09-13
EP1701041A3 EP1701041A3 (fr) 2008-03-12

Family

ID=36337598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06002266A Withdrawn EP1701041A3 (fr) 2005-02-04 2006-02-03 Climatiseur

Country Status (2)

Country Link
EP (1) EP1701041A3 (fr)
JP (1) JP2006242554A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101062552B1 (ko) 2009-08-04 2011-09-06 이숭재 원심형 팬
US8053100B2 (en) 2007-04-03 2011-11-08 Denso Corporation Battery unit with cooling device
CN106438405A (zh) * 2016-09-22 2017-02-22 中山大洋电机股份有限公司 一种盘管风机结构
EP3193022A1 (fr) * 2016-01-13 2017-07-19 Silverline Endüstri ve Ticaret Anonim Sirketi Ventilateur centrifuge
CN107101424A (zh) * 2017-06-30 2017-08-29 广东美芝制冷设备有限公司 蒸发器组件、车载空调系统及车辆
CN107289605A (zh) * 2017-07-31 2017-10-24 广东美的制冷设备有限公司 蜗舌、蜗壳、贯流风机和空调室内机
US10865798B2 (en) 2016-05-30 2020-12-15 Zhongshan Broad-Ocean Motor Co., Ltd. Fan coil unit
WO2024047448A1 (fr) * 2022-08-31 2024-03-07 Dyson Technology Limited Volute pour turbomachine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5029577B2 (ja) * 2008-11-14 2012-09-19 パナソニック株式会社 空気調和機の室内機
CN104870827B (zh) * 2012-12-25 2017-07-11 松下知识产权经营株式会社 离心风机和使用其的带消音箱的风机
JP6731732B2 (ja) * 2016-01-18 2020-07-29 日立ジョンソンコントロールズ空調株式会社 空気調和機の室外機および送風機
JP6909069B2 (ja) * 2017-06-20 2021-07-28 株式会社日本クライメイトシステムズ 車両用空調装置の送風機

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2106638A (en) * 1981-09-09 1983-04-13 Delchi Spa Convector fan unit
GB2155616A (en) * 1981-10-21 1985-09-25 Mitsubishi Electric Corp Air conditioning device
US5771708A (en) * 1995-11-20 1998-06-30 Mitsubishi Denki Kabushiki Kaisha Blowoff orifice
US20040165984A1 (en) * 2003-01-09 2004-08-26 Toshinori Ochiai Centrifugal air blower unit having movable portion
WO2004090337A1 (fr) * 2003-04-14 2004-10-21 Danfoss A/S Dispositif de ventilation comportant un turbine tangentielle
JP2004340495A (ja) * 2003-05-16 2004-12-02 Fujitsu General Ltd 空気調和機

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03143723A (ja) * 1989-10-26 1991-06-19 Matsushita Electric Ind Co Ltd 車輌用空気調和装置
JPH0642768A (ja) * 1992-04-07 1994-02-18 Daikin Ind Ltd 空気調和機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2106638A (en) * 1981-09-09 1983-04-13 Delchi Spa Convector fan unit
GB2155616A (en) * 1981-10-21 1985-09-25 Mitsubishi Electric Corp Air conditioning device
US5771708A (en) * 1995-11-20 1998-06-30 Mitsubishi Denki Kabushiki Kaisha Blowoff orifice
US20040165984A1 (en) * 2003-01-09 2004-08-26 Toshinori Ochiai Centrifugal air blower unit having movable portion
WO2004090337A1 (fr) * 2003-04-14 2004-10-21 Danfoss A/S Dispositif de ventilation comportant un turbine tangentielle
JP2004340495A (ja) * 2003-05-16 2004-12-02 Fujitsu General Ltd 空気調和機

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8053100B2 (en) 2007-04-03 2011-11-08 Denso Corporation Battery unit with cooling device
KR101062552B1 (ko) 2009-08-04 2011-09-06 이숭재 원심형 팬
EP3193022A1 (fr) * 2016-01-13 2017-07-19 Silverline Endüstri ve Ticaret Anonim Sirketi Ventilateur centrifuge
US10865798B2 (en) 2016-05-30 2020-12-15 Zhongshan Broad-Ocean Motor Co., Ltd. Fan coil unit
CN106438405A (zh) * 2016-09-22 2017-02-22 中山大洋电机股份有限公司 一种盘管风机结构
CN106438405B (zh) * 2016-09-22 2019-04-26 中山大洋电机股份有限公司 一种盘管风机结构
CN107101424A (zh) * 2017-06-30 2017-08-29 广东美芝制冷设备有限公司 蒸发器组件、车载空调系统及车辆
CN107289605A (zh) * 2017-07-31 2017-10-24 广东美的制冷设备有限公司 蜗舌、蜗壳、贯流风机和空调室内机
CN107289605B (zh) * 2017-07-31 2023-09-26 广东美的制冷设备有限公司 蜗舌、蜗壳、贯流风机和空调室内机
WO2024047448A1 (fr) * 2022-08-31 2024-03-07 Dyson Technology Limited Volute pour turbomachine

Also Published As

Publication number Publication date
JP2006242554A (ja) 2006-09-14
EP1701041A3 (fr) 2008-03-12

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