EP0922911A2 - Unité extérieure d'un système de conditionnement d'air - Google Patents

Unité extérieure d'un système de conditionnement d'air Download PDF

Info

Publication number
EP0922911A2
EP0922911A2 EP98122718A EP98122718A EP0922911A2 EP 0922911 A2 EP0922911 A2 EP 0922911A2 EP 98122718 A EP98122718 A EP 98122718A EP 98122718 A EP98122718 A EP 98122718A EP 0922911 A2 EP0922911 A2 EP 0922911A2
Authority
EP
European Patent Office
Prior art keywords
outdoor unit
bell mouth
air
damping portion
conditioning system
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Withdrawn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
EP98122718A
Other languages
German (de)
English (en)
Other versions
EP0922911A3 (fr
Inventor
Tetsushi Kishitani
Makoto Nagai
Ryoji Sato
Shinichiro Yamada
Kenichi Nakamura
Yoshinori Iwashina
Yoshiharu Tsukada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0922911A2 publication Critical patent/EP0922911A2/fr
Publication of EP0922911A3 publication Critical patent/EP0922911A3/fr
Withdrawn legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to an air-conditioning system. More particularly, it is concerned with an outdoor unit of an air-conditioning system that is suited for installation on a rooftop, for example.
  • an outdoor unit proposed in Japanese Unexamined Patent Publication No. 3-255829 is an example of an outdoor unit of an air-conditioning system.
  • This outdoor unit is constructed such that a bell mouth for guiding an air flow produced by a fan is provided at an extreme end of a shroud which forms an air outlet, with a specified clearance provided between the outer periphery of the fan and the bell mouth, and the distance between an extreme end, or the uppermost part, of the bell mouth and the lowermost part of the fan varies along its circumferential direction.
  • One approach to reducing the size of an outdoor unit without sacrificing its capacity is to reduce distances between its various components assembled into the outdoor unit, such as a heat exchanger, propeller fan, compressor and electric element box, without changing their physical sizes and thereby reduce the size of a housing of the outdoor unit.
  • an object of the invention to provide an outdoor unit of an air-conditioning system characterized in that the outdoor unit has a reduced physical size, and vibration of a housing of the outdoor unit caused by the aforementioned pressure pulsation is reduced.
  • an outdoor unit of an air-conditioning system of the invention is constructed such that a bell mouth is provided with a damping portion which extends in an upstream direction from part of the circumference of the bell mouth, the part of the circumference located on a side opposite to a heat exchanger where a propeller fan and a side panel are positioned close to each other.
  • an upstream end of the damping portion is formed such that it is located at the same position with at least an upstream end of the propeller fan.
  • the damping portion be one-piece formed with the bell mouth in the aforementioned outdoor unit.
  • the damping portion be one-piece formed with a top panel of the outdoor unit and the bell mouth in the aforementioned outdoor unit.
  • the damping portion be formed separately from the bell mouth and detachably attached to the bell mouth in the aforementioned outdoor unit.
  • the damping portion be formed of a synthetic resin in the aforementioned outdoor unit.
  • FIG. 1 is a side view showing the construction of an outdoor unit of an air-conditioning system embodying the present invention
  • FIG. 2 is a plan view of the outdoor unit of FIG. 1
  • FIG. 3 is an enlarged view of a propeller fan section of FIG. 1
  • FIG. 4 is a perspective view of a bell mouth of FIG. 1
  • FIG. 5 is an enlarged sectional view of portion B of FIG. 4.
  • the numeral 1 indicates a housing of the outdoor unit constructed of a front panel 2, a rear panel 3, left and right side panels 4, a top panel 5 and a bottom plate 6.
  • the numeral 7 indicates a heat exchanger which is located close to the rear panel 3 of the housing 1.
  • the numeral 8 indicates a machine compartment which is located close to the front panel 2, incorporating mechanical devices such as a compressor.
  • the numeral 9 indicates an electric element box which is located above the machine compartment 8, incorporating electric devices such as a controller.
  • the numeral 10 indicates a motor support which is fixed to a specific position inside the housing 1.
  • the numeral 11 indicates a motor fixed to the motor support 10.
  • the numeral 12 indicates a propeller fan which is fixed to a rotary shaft 11a of the motor 11.
  • Indicated by the numeral 13 is the bell mouth which includes a guide portion 13a for guiding air blown out from the propeller fan 12 and a damping portion 14 projecting upstream from the guide portion along its axial direction, in which the guide portion 13a and the damping portion 14 are formed into a single piece as shown in FIG. 4.
  • the bell mouth 13 is fixed to an air outlet of the top panel 5 in such a way that the guide portion 13a surrounds an outflow side of the propeller fan 12 with a specified clearance provided between the guide portion 13a and the propeller fan 12, and the damping portion 14 is located between the front panel 2 and the propeller fan 12.
  • An end surface 14a of the damping portion 14 at its upstream side is chamfered into an arc shape in cross section as shown in FIG. 5.
  • the propeller fan 12 rotates when the motor 11 is run, and air in the housing 1 is blown out through the bell mouth 13. Then, a negative pressure is developed inside the housing 1 and, as a consequence, outside air flows into the housing 1 through the heat exchanger 7.
  • the propeller fan 12 draws in the air just from its axial direction and, therefore, pressure variations (pressure pulsation) that cause the front panel 2 to vibrate in the direction of arrow A shown in FIG. 3 occur on an inflow side of the propeller fan 12.
  • pressure variations pressure pulsation
  • the bell mouth 13 and the damping portion 14 may be one-piece formed using a metallic or synthetic resin material.
  • the bell mouth 13 and the damping portion 14 may be formed of metallic and synthetic resin materials, respectively.
  • FIG. 6 is a plan view showing an outdoor unit of an air-conditioning system according to a second embodiment of the invention.
  • elements identical to those shown in FIG. 2 are designated by the same reference numerals.
  • a heat exchanger 7 is mounted along a rear panel 3 and one side panel 4 as illustrated, the clearance between the outer periphery of a propeller fan 12 and a front panel 2 and the other side panel 4 decreases.
  • a bell mouth 13 is installed such that a damping portion 14 is positioned in the clearance between them to thereby reduce vibration of the outdoor unit caused by pressure pulsation.
  • FIG. 7 is a plan view showing an outdoor unit of an air-conditioning system according to a third embodiment of the invention.
  • FIG. 8 is a plan view showing an outdoor unit of an air-conditioning system according to a fourth embodiment of the invention.
  • FIG. 9 is a perspective view of the bell mouth according to the second embodiment of the invention.
  • the numeral 13 indicates the bell mouth which includes a guide portion 13a for guiding air blown out from the propeller fan and the damping portion 14 projecting upstream from the guide portion 13a along its axial direction, in which the guide portion 13a and the damping portion 14 are formed into a single piece and a far end of the damping portion 14 at its upstream side is cut into an arc shape.
  • FIG. 10 is a perspective view of the bell mouth according to the third embodiment of the invention.
  • the numeral 13 indicates the bell mouth which includes a guide portion 13a for guiding air blown out from the propeller fan and the damping portion 14 projecting in a semicircular shape upstream from the guide portion 13a along its axial direction, in which the guide portion 13a and the damping portion 14 are formed into a single piece.
  • FIG. 11 is a perspective view of the bell mouth according to the fourth embodiment of the invention.
  • the numeral 13 indicates the bell mouth which includes a guide portion 13a for guiding air blown out from the propeller fan and the damping portion 14 projecting upstream from the guide portion 13a along its axial direction, the width of the damping portion 14 decreasing toward the upstream side, in which the guide portion 13a and the damping portion 14 are formed into a single piece.
  • FIG. 12 is a perspective view of a bell mouth according to a fifth embodiment of the invention.
  • the numeral 13 indicates the bell mouth which includes a guide portion 13a for guiding air blown out from a propeller fan and a damping portion 14 projecting upstream from the guide portion 13a along its axial direction, in which the damping portion 14 is cut into an arc shape in such a way that the width of the damping portion 14 decreases toward the upstream side, and the guide portion 13a and the damping portion 14 are formed into a single piece.
  • FIGS. 9, 10, 11 and 12 make it possible to reduce the cost of materials without impairing the damping effect when the position where pressure pulsation occurs exists close to the guide portion 13a due to the relationship between the positions of the propeller fan and the bell mouth 13 along the axial direction.
  • FIG. 13 is a perspective view of a bell mouth according to a sixth embodiment of the invention.
  • the numeral 13 indicates the bell mouth which includes a guide portion 13a for guiding air blown out from a propeller fan and a damping portion 14 projecting upstream from the guide portion 13a along its axial direction, in which the damping portion 14 is cut at its connecting areas adjoining the guide portion 13a in such a way that the width of the damping portion 14 increases toward the upstream side, and the guide portion 13a and the damping portion 14 are formed into a single piece.
  • FIG. 14 is a perspective view of a bell mouth according to a seventh embodiment of the invention.
  • the numeral 13 indicates the bell mouth which includes a guide portion 13a for guiding air blown out from a propeller fan and a damping portion 14 projecting upstream from the guide portion 13a along its axial direction, in which the damping portion 14 is cut into an arc shape at its connecting areas adjoining the guide portion 13a in such a way that the width of the damping portion 14 increases toward the upstream side, and the guide portion 13a and the damping portion 14 are formed into a single piece.
  • FIGS. 13 and 14 make it possible to reduce the cost of materials without impairing the damping effect when the position where pressure pulsation occurs exists upstream side of the damping portion 14 due to the relationship between the positions of the propeller fan and the bell mouth 13 along the axial direction.
  • FIG. 15 is a perspective view of a bell mouth according to an eighth embodiment of the invention.
  • the numeral 13 indicates the bell mouth which includes a guide portion 13a for guiding air blown out from a propeller fan and a damping portion 14 which is formed separately from the guide portion 13a and is detachably joined to the guide portion 13a by fixing parts 15 like screws.
  • FIG. 16 is a perspective view of a bell mouth according to a ninth embodiment of the invention.
  • the numeral 13 indicates the bell mouth of which guide portion 13a and damping portion 14 are formed as single piece together with a top panel 5.
  • FIG. 17 is a perspective view of a bell mouth according to a tenth embodiment of the invention.
  • the numeral 13 indicates the bell mouth of which guide portion 13a and a top panel 5 is formed as single piece while a damping portion 14 is formed as a separate element and detachably joined to the guide portion 13a by fixing parts 15.
  • the present invention makes it possible to decrease vibration of an outdoor unit of an air-conditioning system due to pressure pulsation which is produced by a propeller fan when the physical size of the outdoor unit is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
EP98122718A 1997-12-11 1998-11-30 Unité extérieure d'un système de conditionnement d'air Withdrawn EP0922911A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP34131997 1997-12-11
JP34131997A JPH11173605A (ja) 1997-12-11 1997-12-11 空気調和機の室外ユニット

Publications (2)

Publication Number Publication Date
EP0922911A2 true EP0922911A2 (fr) 1999-06-16
EP0922911A3 EP0922911A3 (fr) 2001-06-20

Family

ID=18345147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98122718A Withdrawn EP0922911A3 (fr) 1997-12-11 1998-11-30 Unité extérieure d'un système de conditionnement d'air

Country Status (2)

Country Link
EP (1) EP0922911A3 (fr)
JP (1) JPH11173605A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051859A1 (fr) * 2000-01-14 2001-07-19 Toshiba Carrier Corporation Unite exterieure de conditionneur d'air
EP1577616A1 (fr) * 2002-11-05 2005-09-21 Daikin Industries, Ltd. Unite de refrigeration en exterieur et armoire de commande electrique
EP2085709A1 (fr) * 2008-01-30 2009-08-05 LG Electronics Inc. Climatiseur
CN105526644A (zh) * 2016-01-15 2016-04-27 珠海格力电器股份有限公司 一种空调器室外机
EP3351861A1 (fr) * 2017-01-24 2018-07-25 Vaillant GmbH Échangeur de chaleur à air
EP3354995A1 (fr) 2017-01-30 2018-08-01 Daikin applied Europe S.p.A. Ventilateur pour système de conditionnement de température
EP4012278A1 (fr) * 2020-12-08 2022-06-15 Robert Bosch GmbH Dispositif de transfert de chaleur et utilisation d'un dispositif de transfert de chaleur

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080051593A (ko) * 2006-12-06 2008-06-11 삼성전자주식회사 공기조화기의 실외기
EP2824333B1 (fr) * 2008-03-11 2019-03-27 Mitsubishi Electric Corporation Climatiseur
JP5812572B2 (ja) * 2010-03-24 2015-11-17 三菱電機株式会社 軸流送風機およびこの軸流送風機を用いた空気調和機の室外機
CN102853482A (zh) * 2011-06-29 2013-01-02 日立空调·家用电器株式会社 一种分体式空调器室外机
JP6283194B2 (ja) * 2013-10-21 2018-02-21 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
US10982863B2 (en) * 2018-04-10 2021-04-20 Carrier Corporation HVAC fan inlet
JP7100507B2 (ja) * 2018-06-22 2022-07-13 三菱重工サーマルシステムズ株式会社 室外機ユニット

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03255829A (ja) 1990-03-07 1991-11-14 Hitachi Ltd 空気調和機用室外ユニット

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240588B (en) * 1990-01-31 1994-08-03 Toshiba Kk Ventilating fan
JPH07174363A (ja) * 1993-12-20 1995-07-14 Matsushita Refrig Co Ltd 空気調和機の室外機
JPH09137970A (ja) * 1995-11-15 1997-05-27 Matsushita Refrig Co Ltd 空気調和機の室外機

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03255829A (ja) 1990-03-07 1991-11-14 Hitachi Ltd 空気調和機用室外ユニット

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051859A1 (fr) * 2000-01-14 2001-07-19 Toshiba Carrier Corporation Unite exterieure de conditionneur d'air
US6591628B2 (en) 2000-01-14 2003-07-15 Toshiba Carrier Corporation Outdoor unit of air conditioner
EP1577616A1 (fr) * 2002-11-05 2005-09-21 Daikin Industries, Ltd. Unite de refrigeration en exterieur et armoire de commande electrique
EP1577616A4 (fr) * 2002-11-05 2007-08-08 Daikin Ind Ltd Unite de refrigeration en exterieur et armoire de commande electrique
US7363768B2 (en) 2002-11-05 2008-04-29 Daikin Industries, Ltd. Outdoor unit of refrigerator, and electrical equipment box of outdoor unit
EP2085709A1 (fr) * 2008-01-30 2009-08-05 LG Electronics Inc. Climatiseur
CN105526644A (zh) * 2016-01-15 2016-04-27 珠海格力电器股份有限公司 一种空调器室外机
EP3351861A1 (fr) * 2017-01-24 2018-07-25 Vaillant GmbH Échangeur de chaleur à air
EP3354995A1 (fr) 2017-01-30 2018-08-01 Daikin applied Europe S.p.A. Ventilateur pour système de conditionnement de température
EP4012278A1 (fr) * 2020-12-08 2022-06-15 Robert Bosch GmbH Dispositif de transfert de chaleur et utilisation d'un dispositif de transfert de chaleur

Also Published As

Publication number Publication date
JPH11173605A (ja) 1999-07-02
EP0922911A3 (fr) 2001-06-20

Similar Documents

Publication Publication Date Title
EP0922911A2 (fr) Unité extérieure d'un système de conditionnement d'air
US8240997B2 (en) Centrifugal impeller and centrifugal blower using the centrifugal impeller
EP2273207B1 (fr) Dispositif de conditionnement d'air pour montage au plafond
JP2003301794A (ja) 遠心式送風機
EP1050720B1 (fr) Appareil de conditionnement d'air
EP2848817B1 (fr) Ventilateur centrifuge et appareil de climatisation
AU2020289818B2 (en) Propeller fan, air-sending device, and refrigeration cycle device
JPWO2017051521A1 (ja) 温度調和ユニット、温度調和システム、車両
JP2018084232A (ja) 送風装置及びこれを用いた空気調和機用室外機
JP2007205268A (ja) 遠心ファン
CN105179273B (zh) 一种空气调节设备
JP4577131B2 (ja) 送風装置およびこの送風装置を備えた空気調和機用室外ユニット
JP2003214658A (ja) 空気調和機の室外機
US4633680A (en) Double wall condenser orifice
JP2002054594A (ja) 遠心ファン
JP5465021B2 (ja) ターボファン及びこのターボファンを備えた空気調和機
JP2007051790A (ja) 空調用室内機
JP2007263415A (ja) 室外機
JP2006003011A (ja) 高所設置型空気調和機の天板構造
JP3141663B2 (ja) 空気調和機の室内ユニット
JP4317676B2 (ja) 空気調和機用ターボファン
JP2011163564A (ja) 空気調和機の室内ユニット
JP4807225B2 (ja) 空気調和機用室外機ユニット
US11852168B2 (en) Fan hub isolator
JP7312934B2 (ja) ターボファン

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19981130

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES GB

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 7F 24F 1/00 A, 7F 24F 13/24 B

AKX Designation fees paid

Free format text: DE ES GB

17Q First examination report despatched

Effective date: 20040309

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20040609