EP1610068A1 - Ausseneinheit für klimaanlage - Google Patents

Ausseneinheit für klimaanlage Download PDF

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Publication number
EP1610068A1
EP1610068A1 EP04724144A EP04724144A EP1610068A1 EP 1610068 A1 EP1610068 A1 EP 1610068A1 EP 04724144 A EP04724144 A EP 04724144A EP 04724144 A EP04724144 A EP 04724144A EP 1610068 A1 EP1610068 A1 EP 1610068A1
Authority
EP
European Patent Office
Prior art keywords
bell mouth
vane
rear edge
profile line
axial fan
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
EP04724144A
Other languages
English (en)
French (fr)
Other versions
EP1610068A4 (de
EP1610068B1 (de
Inventor
Mitsuyoshi Fuji Thoshiba Carr.Corp ISHIJIMA
Akihiro Fuji Thoshiba Carr.Corp TAKEUCHI
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.)
Toshiba Carrier Corp
Original Assignee
Toshiba Carrier 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 Toshiba Carrier Corp filed Critical Toshiba Carrier Corp
Publication of EP1610068A1 publication Critical patent/EP1610068A1/de
Publication of EP1610068A4 publication Critical patent/EP1610068A4/de
Application granted granted Critical
Publication of EP1610068B1 publication Critical patent/EP1610068B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/40—Vibration or noise prevention at outdoor 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
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form

Definitions

  • the present invention relates to an outdoor unit of an air conditioner, and more particularly to an outdoor unit provided with an axial blower which can suppress blower noise.
  • the outdoor unit of the air conditioner is structured such that a bell mouth is attached to a discharge opening, and an axial blower having an axial fan provided with a plurality of vanes, which are arranged with a predetermined interval along an outer peripheral surface of a rotary hub, is arranged in an air inflow direction to the bell mouth.
  • an axial fan in which a corner portion, at which a front edge portion of the vane and an outer peripheral portion of the vane intersect, protrudes largely to a rotation direction side, and a profile line of the rear edge portion is formed in a concave shape in the air inflow direction (for example, Japanese Patent Application Laid-Open No. 2002-257088).
  • the present invention was conceived by taking the above circumstances into consideration, and an object of the present invention is to provide an outdoor unit of an air conditioner provided with an axial blower which intends to rectify a vane rear edge portion by optimizing a positional relation in an axial direction between the vane rear edge portion and a bell mouth, thereby reducing the blower noise.
  • an outdoor unit of an air conditioner comprising: an axial fan provided with a plurality of vanes with a predetermined interval along an outer peripheral surface of a hub, each of the vanes having a vane rear edge portion having a profile line in a rotational direction to provide a concave shape in a vane front edge direction; and a bell mouth arranged on an air blowing side from the axial fan, wherein the bell mouth and the axial fan are arranged so as to satisfy a ratio (X/L) to be in a range between 0.2 and 0.8 in which X is a distance between a most recessed portion to an inner side in the rotational direction of the profile line of the vane rear edge and an air outflow surface of the bell mouth and L is a length in an axial direction of the bell mouth.
  • an outdoor unit of an air conditioner comprising: an axial fan provided with a plurality of vanes with a predetermined interval along an outer peripheral surface of a hub, each of the vanes having a vane rear edge portion having a profile line in a rotational direction to provide a concave shape in a vane front edge direction; and a bell mouth arranged on an air blowing side from the axial fan, wherein the bell mouth and the axial fan are arranged so as to satisfy a ratio (Y/L) to be in a range between 0.3 and 0.9 in which Y is a distance between a point where a profile line in a circumferential direction of the vane and a profile line of the vane rear edge portion intersect and an air outflow surface of the bell mouth and L is a length in an axial direction of the bell mouth.
  • Y/L a ratio
  • the concave shape of the profile line of the vane rear edge portion is a circular arc shape.
  • the concave shape of the profile line of the vane rear edge portion may be a V-shape or a trapezoidal shape.
  • an outdoor unit of an air conditioner comprising: an axial fan provided with a plurality of vanes with a predetermined interval along an outer peripheral surface of a hub, each of the vanes having a vane rear edge portion having a profile line in a rotational direction to provide a concave shape in a vane front edge direction; and a bell mouth arranged on an air blowing side from the axial fan, wherein the bell mouth and the axial fan are arranged so as to satisfy a ratio (X/L) to be in a range between 0.2 and 0.8 in which X is a distance between a most recessed portion to an inner side in the rotational direction of the profile line of the vane rear edge and an air outflow surface of the bell mouth and L is a length in an axial direction of the bell mouth, and wherein the bell mouth and the axial fan are arranged so as to satisfy a ratio (Y/L) to be in a range between 0.3 and 0.9 in which Y is
  • the outdoor unit of the air conditioner provided with the axial blower capable of satisfying both demands of a blowing rate and of reduction of the electric motor load, inhibiting a vortex generated in the vane rear edge portion of the axial fan and reducing a blower noise, by setting a positional relation between the vane of the axial fan and the bell mouth to an optimum value, in the outdoor unit of the air conditioner.
  • Fig. 1 is a sectional view of an outdoor unit 1 of an air conditioner.
  • the outdoor unit 1 is used in a state of being connected to an indoor unit, not shown, and is constituted by a bottom plate 2 arranged in a floor surface outside the room, structural members or parts, which will be mentioned hereinlater, arranged on the bottom plate 2, a discharge opening 4 and a main body cover 3 having a fan guard 5 which covers the discharge opening 4 and covering the structural members and the bottom plate 2.
  • the outdoor unit 1 is provided with a compressor 6 circulating a refrigerant in a refrigeration cycle, a refrigeration cycle member including an outdoor heat exchanger 7 in which plate-like heat radiation fins are laminated with a predetermined interval in a heat exchanger tube through which the refrigerant flows, a blower 8 for supplying an outdoor air to the outdoor heat exchanger 7, and a bell mouth 9 formed to the discharge opening 4, as the structural members, in an inner portion thereof.
  • the blower 8 is constituted by an axial fan 10 and a fan motor 11 and is arranged between the outdoor heat exchanger 7 and the bell mouth 9 in an axial direction thereof.
  • the fan motor 11 is mounted to a motor fixing plate 11a mounted to the bottom plate 2 by a fixture such as screw or the like.
  • the structural members or parts are arranged side by side in an axial direction of the motor in the order of the outdoor heat exchanger 7, the fan motor 11, the axial fan 10 and the bell mouth 9, from an upstream side of an air generated by the axial fan 10.
  • Fig. 2 is a plan view showing an entire structure of the axial fan 10 according to the present invention viewed from a positive pressure surface side of vanes 10b
  • Fig. 3 is an enlarged view showing one vane 10b in Fig. 2.
  • a plurality of vanes 10b are integrated with or integrally attached to a side surface of an outer peripheral surface of a cylindrical hub 10a at uniformly divided positions in a circumferential direction thereof and is integrally formed, for example, by resin molding or the like.
  • a rotating shaft of the fan motor 11 is inserted into and then fixed to a central portion of the hub 10a, and the axial fan 10 is rotated in a direction of an arrow M by the fan motor 11.
  • the vane 10b has a portion integrally connected to the hub 10a as a root portion 20. Further, a front side in a rotational direction (M) of the vane 10b is formed as a vane front edge portion 21, a rear side in the rotational direction is formed as a vane rear edge portion 22, and an end portion connecting an outer peripheral end portion of the vane front edge portion 21 and an outer peripheral end portion of the vane rear edge 22 is formed as a vane outer peripheral portion 23.
  • M rotational direction
  • the vane front edge portion 21 corresponds to an air introducing direction
  • the vane rear edge portion 22 corresponds to an air outflow direction (Fig. 3).
  • the vane front edge portion 21 largely protrudes in the rotating or rotational direction toward the vane outer peripheral portion 23 from the root portion 20, and a profile line of the vane rear edge portion 22 is formed as a circular arc shaped concave portion recessed in the introducing direction opposite to the air outflow direction.
  • a corner portion corresponding to a connection portion (an intersection portion) between the vane rear edge portion 22 and the vane outer peripheral portion 23 is formed as a convex bulge portion 24 bulging in the air outflow direction.
  • the air is sucked into an inner portion of the outdoor unit by the rotation of the axial fan 10 and passes through the outdoor heat exchanger 7, the axial fan 10 and the bell mouth 9, and the air is then discharged to the outside of the outdoor unit 1 from the fan guard 5.
  • Fig. 4 is a view showing a positional relation between the axial fan 10 and the bell mouth 9 in the first embodiment.
  • the bell mouth 9 is provided around the discharge opening 4 of the main body cover 3 and is opposed to the vane rear edge portion 22 in the axial direction of the axial fan 10.
  • the vane rear edge portion 22 of the vane 10b is arranged such that points G and Q thereof completely lap over the bell mouth 9 in an axial direction so as to enter into the bell mouth.
  • Fig. 5 is a graph showing a relation between a ratio (X/L) and a blower noise in which a distance between a point G most recessed into an inner side in the rotational direction of the vane rear edge portion 22 of the vane 10b and the air outflow surface 9b of the bell mouth 9 in Fig. 4 is set to X, and a length in the axial direction of the bell mouth 9 is set to L.
  • the blower noise is reduced by arranging the axial fan 10 and the bell mouth 9 in a range in which the length X from the point G of the vane rear edge portion 22 to the air outflow surface 9b of the bell mouth is between about 20% of the length L in the axial direction of the bell mouth 9 and 80% (0.2L to 0.8L), and in particular, the blower noise becomes minimum when the length X is near 50% of the length L. Accordingly, it is experimentally known that it is effective to set the length X to the range mentioned above to reduce the blower noise.
  • the experiment for this knowledge has been executed by installing the outdoor unit within an anechoic room and placing a microphone connected to a noise level meter at a position 1 m apart from a front surface of the outdoor unit, on the basis of JIS (Z 8731).
  • the blower noise through the microphone is displayed on the noise level meter by a sound pressure level (dB).
  • the first modified embodiment shown in Fig. 6 has a shape of the vane rear edge portion different from the shape of the vane rear edge portion 22 of the first embodiment in Fig. 3, the other same or identical portions are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • the axial fan has a profile line of the vane rear edge portion 22 used in the first embodiment, the axial fan being formed with an approximately V-shaped concave portion.
  • the axial fan 10 is provided with the vane rear edge portion 22 having the profile line of approximately V-shaped concave portion recessed in an introducing direction opposite to the air outflow direction.
  • a peak Z of the V-shape corresponds to a point G of the circular arc shaped concave portion in the first embodiment
  • a point Q1 where the rear edge portion 22 of the V-shape and the vane outer peripheral portion 23 intersect corresponds to the point Q in the first embodiment
  • the second modified embodiment shown in Fig. 7 has a shape of the vane rear edge portion different from the shape of the vane rear edge portion 22 of the first embodiment in Fig. 3, the other same or identical portions are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • the axial fan has a profile line of the vane rear edge portion 22 used in the first embodiment, the axial fan being formed with a trapezoidal concave portion.
  • the axial fan 10 is provided with the vane rear edge portion 22 having the profile line of approximately trapezoidal concave portion recessed in an introducing direction opposite to the air outflow direction.
  • a linear portion U of the trapezoidal shape corresponds to the point G in the first embodiment
  • a point Q2 where the rear edge portion 22 of the trapezoidal shape and the vane outer peripheral portion 23 intersect corresponds to the point Q in the first embodiment
  • the bulge portion 24 of the vane 10b is arranged so as not to protrude from the air outflow surface 9b of the bell mouth 9 in the axial direction, contrary to the structure shown in Fig. 4.
  • Fig. 8 relates to the second embodiment and is a graph showing a relation between a ratio (Y/L) and the blower noise in which a point where the vane outer peripheral portion 23 of the vane 10b and the vane rear edge portion 22 intersect is set to a point Q, a distance between the point Q and the air outflow surface 9b of the bell mouth 9 is set to Y, and the length in the axial direction of the bell mouth 9 is set to L.
  • the blower noise is reduced by arranging the axial fan 10 and the bell mouth 9 in a range in which the length Y from the point Q of the vane rear edge portion 22 to the air outflow surface 9b of the bell mouth is between about 30% of the length L in the axial direction of the bell mouth 9 and 90% (0.3L to 0.9L), and in particular, the blower noise becomes minimum when the length Y is near 60% of the length L. Accordingly, it was found through an experiment that it is effective to set the length Y to the range mentioned above in order to reduce the blower noise. The experiment was executed under the same condition as that executed in connection with the first embodiment.
  • an outdoor unit of an air conditioner provided with an axial blower which can satisfy both the requirements of the blowing rate and of reducing the electric motor load, and in addition, the vortex generation in the vane rear edge portion of the axial fan can be inhibited and the blower noise can be effectively reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Other Air-Conditioning Systems (AREA)
EP04724144A 2003-03-31 2004-03-29 Ausseneinheit für klimaanlage Expired - Lifetime EP1610068B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003096748 2003-03-31
JP2003096748A JP2004301451A (ja) 2003-03-31 2003-03-31 空気調和装置の室外機
PCT/JP2004/004426 WO2004088210A1 (ja) 2003-03-31 2004-03-29 空気調和装置の室外機

Publications (3)

Publication Number Publication Date
EP1610068A1 true EP1610068A1 (de) 2005-12-28
EP1610068A4 EP1610068A4 (de) 2007-11-21
EP1610068B1 EP1610068B1 (de) 2009-09-16

Family

ID=33127524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04724144A Expired - Lifetime EP1610068B1 (de) 2003-03-31 2004-03-29 Ausseneinheit für klimaanlage

Country Status (6)

Country Link
EP (1) EP1610068B1 (de)
JP (1) JP2004301451A (de)
KR (1) KR100724824B1 (de)
CN (2) CN100343590C (de)
ES (1) ES2332591T3 (de)
WO (1) WO2004088210A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085618A2 (de) * 2008-01-30 2009-08-05 LG Electronics Inc. Außeneinheit einer Klimaanlage und Lüfter dafür
EP2960525A4 (de) * 2013-02-22 2016-10-12 Hitachi Appliances Inc Propellerlüfter und klimaanlage damit
EP3182025A1 (de) * 2015-12-14 2017-06-21 Lg Electronics Inc. Öffnung für klimaanlage

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4689262B2 (ja) * 2004-12-21 2011-05-25 東芝キヤリア株式会社 軸流ファン、空気調和機の室外機
KR100749656B1 (ko) 2006-12-15 2007-08-14 주식회사 케이티 저소음형 실외기
EP2233847B1 (de) * 2008-03-11 2016-07-13 Mitsubishi Electric Corporation Klimaanlage
KR20130109515A (ko) * 2012-03-27 2013-10-08 삼성전자주식회사 공조기기의의 실외기의 축류팬
CN102720700B (zh) * 2012-06-21 2015-11-25 海尔集团公司 轴流风扇的叶片及空调用轴流风扇
US9551498B2 (en) * 2012-06-28 2017-01-24 Samsung Electronics Co., Ltd. Indoor unit of air conditioner and method of controlling the air conditioner
JP6170783B2 (ja) * 2012-09-19 2017-07-26 東芝キヤリア株式会社 プロペラファンおよび空気調和機の室外ユニット
CN106903875A (zh) * 2017-03-16 2017-06-30 青岛科技大学 一种3d打印用小型螺杆塑化装置
JP7173939B2 (ja) * 2019-08-26 2022-11-16 ダイキン工業株式会社 送風装置及びヒートポンプユニット

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002257096A (ja) * 2000-12-28 2002-09-11 Daikin Ind Ltd 送風装置および空気調和機用室外機
JP2002257088A (ja) * 2001-03-06 2002-09-11 Toshiba Kyaria Kk 軸流ファン
JP2003013892A (ja) * 2001-04-26 2003-01-15 Daikin Ind Ltd 送風機及び該送風機を備えた空気調和機
EP1357296A1 (de) * 2000-12-28 2003-10-29 Daikin Industries, Ltd. Gebläse und ausseneinheit für klimaanlage
EP1382856A1 (de) * 2001-04-26 2004-01-21 Daikin Industries, Ltd. Lüfter und klimaanlage mit diesem lüfter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2932814B2 (ja) * 1992-02-21 1999-08-09 ダイキン工業株式会社 空気調和機
JPH06137608A (ja) * 1992-10-28 1994-05-20 Toshiba Ave Corp 空気調和機用室外ユニット

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002257096A (ja) * 2000-12-28 2002-09-11 Daikin Ind Ltd 送風装置および空気調和機用室外機
EP1357296A1 (de) * 2000-12-28 2003-10-29 Daikin Industries, Ltd. Gebläse und ausseneinheit für klimaanlage
JP2002257088A (ja) * 2001-03-06 2002-09-11 Toshiba Kyaria Kk 軸流ファン
JP2003013892A (ja) * 2001-04-26 2003-01-15 Daikin Ind Ltd 送風機及び該送風機を備えた空気調和機
EP1382856A1 (de) * 2001-04-26 2004-01-21 Daikin Industries, Ltd. Lüfter und klimaanlage mit diesem lüfter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004088210A1 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085618A2 (de) * 2008-01-30 2009-08-05 LG Electronics Inc. Außeneinheit einer Klimaanlage und Lüfter dafür
EP2085618A3 (de) * 2008-01-30 2011-10-12 LG Electronics, Inc. Außeneinheit einer Klimaanlage und Lüfter dafür
US8191381B2 (en) 2008-01-30 2012-06-05 Lg Electronics Inc. Outdoor unit of air-conditioner and fan used therefor
EP2960525A4 (de) * 2013-02-22 2016-10-12 Hitachi Appliances Inc Propellerlüfter und klimaanlage damit
EP3182025A1 (de) * 2015-12-14 2017-06-21 Lg Electronics Inc. Öffnung für klimaanlage
US10054355B2 (en) 2015-12-14 2018-08-21 Lg Electronics Inc. Orifice for air conditioner

Also Published As

Publication number Publication date
ES2332591T3 (es) 2010-02-09
CN1768237A (zh) 2006-05-03
CN100343590C (zh) 2007-10-17
CN101025281A (zh) 2007-08-29
JP2004301451A (ja) 2004-10-28
KR100724824B1 (ko) 2007-06-04
CN100480591C (zh) 2009-04-22
EP1610068A4 (de) 2007-11-21
EP1610068B1 (de) 2009-09-16
KR20050120678A (ko) 2005-12-22
WO2004088210A1 (ja) 2004-10-14

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