EP2159497B1 - Outdoor unit of conditioning apparatus - Google Patents

Outdoor unit of conditioning apparatus Download PDF

Info

Publication number
EP2159497B1
EP2159497B1 EP09009377.4A EP09009377A EP2159497B1 EP 2159497 B1 EP2159497 B1 EP 2159497B1 EP 09009377 A EP09009377 A EP 09009377A EP 2159497 B1 EP2159497 B1 EP 2159497B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
bottom plate
water
outdoor unit
conduit
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.)
Not-in-force
Application number
EP09009377.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2159497A1 (en
EP2159497A8 (en
Inventor
Hiroshi Iwazaki
Hironori Nagai
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 EP2159497A1 publication Critical patent/EP2159497A1/en
Publication of EP2159497A8 publication Critical patent/EP2159497A8/en
Application granted granted Critical
Publication of EP2159497B1 publication Critical patent/EP2159497B1/en
Not-in-force 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
    • 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
    • F24F1/36—Drip trays for 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
    • 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
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units

Definitions

  • the present invention relates to an outdoor unit of an air conditioning apparatus and, more particularly, to improvement of a drain water discharge structure.
  • a heat exchanger When a heating mode of operation is performed in an outdoor unit of a separate type air conditioning apparatus, a heat exchanger is deprived of heat by a turning fan. At this time, the heat exchanger condenses the water vapor in the air, causing its surface to be frosted. As time progresses, such frost develops and finally impedes air flow through the heat exchanger and prevents heat from moving. This inhibits heat exchange and heating in a room. To avoid this, the outdoor unit generally performs defrosting operation for a predetermined period of time, thereby melting the frost for resumption of heat exchange. After that, heating and defrosting modes of operation are repeated.
  • a drain water discharge conduit provided on its bottom plate beneath the heat exchanger for discharging the drain water.
  • Such a drain water discharge conduit has a horizontal section formed at a lowest portion thereof, the horizontal section having a drain hole through which the drain water is discharged (for example, see Japanese Unexamined Patent Application Publication No. 2005-188837 ( Fig. 1 ) and Japanese Unexamined Patent Application Publication No. 2000-213779 (Figs. 6 and 8)).
  • Drain water droplets from such an outdoor unit drop onto the discharge conduit into the drain hole through which the drain water is discharged to the outside.
  • the drain water may freeze before reaching the drain hole at low ambient temperatures.
  • the drain water may freeze in the horizontal section around the drain hole, blocking the drain hole or the drain water discharge conduit. If this happens, not only does the frozen drain water inhibit the discharge of the drain water to the outside, but also may cause the horizontal section to further expand to such a degree that the flow of the drain water is degraded, which causes a great amount of water remaining inside the unit to more and more tend to freeze.
  • each time heating and defrosting modes of operation are repeated, the frozen drain water further develops, causing the heat exchanger to malfunction and damaging the outdoor unit.
  • WO 01/65184 A2 discloses an outdoor unit for an air conditioner. It comprises a unit main body which is a housing having a base plate, a compressor, a heat exchanger and a blower which are mounted and fixed on the base plate of the unit main body, and fixing legs which are provided on the unit main body and to be fixed on a mount part by means of fixing elements, wherein the fixing legs are formed as one body with the base plate of the unit main body.
  • a first object of the present invention is to provide an outdoor unit which ensures that drain water is discharged on a rapid manner, and a drain hole is prevented from freezing so that the drain water can be discharged even in a cold area.
  • a second object of the present invention is to provide an outdoor unit which has a bottom plate having a shallow depth, thereby improving the workability as well as strength.
  • a bottom plate has a conduit forming wall formed upright thereon along the heat exchanger, and a water conduit formed by the conduit forming wall has a drain hole and a downwardly tilted surface continuous with the drain hole, which allows drain water droplets to flow to the drain hole without reducing its flow rate.
  • the conduit forming wall formed upright on the bottom plate along the heat exchanger serves as a reinforcement rib of the bottom plate. Accordingly, workability as well as strength can be improved without deepening the bottom plate in the direction of the depth.
  • Fig. 1 is a perspective view showing a bottom plate of an outdoor unit of an air conditioning apparatus according to an embodiment of the present invention.
  • Fig. 2 is a perspective view showing the bottom plate on which a heat exchanger and a compressor are mounted.
  • Fig. 3 is a top view showing the bottom plate on which a blower and a partition in addition to those as shown in Fig. 2 are mounted.
  • Fig. 4 is a perspective view showing the appearance of the entire outdoor unit.
  • An outdoor unit 100 of an air conditioning apparatus includes a heat exchanger 2, a compressor 3, a blower 4, and a partition 5 mounted on a steel bottom plate 1 in the form of a rectangular solid, as shown in Figs. 1 to 4 . These components are enclosed by an enclosure constructed of a peripheral wall 6 and a top plate 7.
  • the bottom plate 1 includes a frame la (hereinafter referred to as "peripheral frame") surrounding the bottom plate 1 and a conduit forming wall 1c formed upright along the heat exchanger 2.
  • a water conduit 1d is formed by partitioning with the conduit forming wall 1c and the peripheral frame 1a.
  • the conduit forming wall 1c prevents drain water from flowing into below the heat exchanger 2 or out of the water conduit.1d.
  • the water conduit 1d has a normally open drain hole 1b for discharging drain water to the outside and a downwardly tilted surface 1e (equal to the bottom face of the water conduit) continuous with the drain hole lb.
  • the bottom plate 1 is also formed as a whole to be downwardly tilted toward the drain hole 1b.
  • the water conduit 1d has a plurality of heat exchanger mounting bases 1f formed at an edge and a corner thereof.
  • the heat exchanger 2 is placed and secured on the mounting bases 1f.
  • the mounting bases 1f are formed to have a height smaller than that of the adjacent conduit forming wall 1c or the peripheral frame 1a.
  • the bottom plate 1 has the peripheral frame 1a, the conduit forming wall 1c, the tilted surface 1e, and the heat exchanger mounting bases 1f integrally formed thereon by press working.
  • the surface of the heat exchanger 2 in the outdoor unit 100 becomes frosted.
  • Defrosting mode of operation is performed for a certain period of time to melt the frost on the surface.
  • Water generated by such defrosting mode of operation drops as drain water onto the downwardly tilted surface 1e continuous with the drain hole 1b in the water conduit 1d on the bottom plate 1 and is guided to the drain hole 1b. Accordingly, such drain water flows at a high rate only below the heat exchanger 2, while concentrating. This prevents the drain water from freezing in the water conduit 1d before it reaches the drain hole 1b even at low ambient temperatures in a cold area, thereby securely discharging the drain water.
  • the outdoor unit of an air conditioning apparatus includes the downwardly tilted surface 1e continuous with the drain hole 1b and the conduit forming wall 1c formed upright along the heat exchanger 2 so as to prevent the drain water from flowing other than below the heat exchanger 2, which allows drain water passages to concentrate, raises the drain water flow rate, and prevents the drain water from freezing before it reaches the drain hole 1b, thereby securing that the drain water is discharged to the outside. This prevents the drain hole 1b and the water conduit 1d from being blocked.
  • the conduit forming wall 1c formed to have an upright structure also serves as a reinforcement rib of the bottom plate 1. This improves workability of steel sheet working (sheet metal working) as well as the strength of the bottom plate 1 without deepening the bottom plate 1 in the direction of the depth.

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)
EP09009377.4A 2008-08-26 2009-07-20 Outdoor unit of conditioning apparatus Not-in-force EP2159497B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008216301A JP2010054063A (ja) 2008-08-26 2008-08-26 空気調和機の室外ユニット

Publications (3)

Publication Number Publication Date
EP2159497A1 EP2159497A1 (en) 2010-03-03
EP2159497A8 EP2159497A8 (en) 2010-04-28
EP2159497B1 true EP2159497B1 (en) 2016-11-09

Family

ID=41228174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09009377.4A Not-in-force EP2159497B1 (en) 2008-08-26 2009-07-20 Outdoor unit of conditioning apparatus

Country Status (2)

Country Link
EP (1) EP2159497B1 (enrdf_load_stackoverflow)
JP (1) JP2010054063A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020184060A1 (en) 2019-03-08 2020-09-17 Daikin Industries, Ltd. Heat source unit for a heat pump

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5609611B2 (ja) 2010-03-11 2014-10-22 株式会社リコー 分光特性取得装置、画像評価装置、及び画像形成装置
FR2991438B1 (fr) * 2012-05-30 2016-12-09 Cie Ind D'applications Thermiques Bac a condensats et appareil de traitement d'air muni d'un tel bac
CN104089344A (zh) * 2014-07-25 2014-10-08 广东志高空调有限公司 一种分体挂壁式空调室外机
KR101753955B1 (ko) * 2014-12-17 2017-07-05 엘지전자 주식회사 공기 조화기의 실외기
JP6625379B2 (ja) * 2015-09-10 2019-12-25 日立ジョンソンコントロールズ空調株式会社 冷凍空調装置
JP6919697B2 (ja) * 2019-11-14 2021-08-18 ダイキン工業株式会社 空気調和機

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146365U (ja) * 1984-08-29 1986-03-27 株式会社東芝 空気調和機の室外ユニツト
JP3523823B2 (ja) * 2000-02-29 2004-04-26 東芝キヤリア株式会社 空気調和機の室外ユニット
ES2215470B1 (es) * 2002-09-30 2005-12-16 Bsh Electrodomesticos España, S.A. Aparato de aire acondicionado.
KR100988572B1 (ko) * 2003-08-14 2010-10-18 삼성전자주식회사 공기조화기의 실외기
JP2005188837A (ja) * 2003-12-25 2005-07-14 Sanyo Electric Co Ltd 空気調和機の室外機
JP4151013B2 (ja) 2004-01-27 2008-09-17 橋詰機工株式会社 軌道構造識別装置
JP4696547B2 (ja) * 2004-12-13 2011-06-08 ダイキン工業株式会社 空気調和機のドレン水静菌構造
EP2122266A1 (en) * 2007-01-10 2009-11-25 Carrier Corporation Condensate removal system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020184060A1 (en) 2019-03-08 2020-09-17 Daikin Industries, Ltd. Heat source unit for a heat pump
US12235000B2 (en) 2019-03-08 2025-02-25 Daikin Industries, Ltd. Heat source unit for a heat pump

Also Published As

Publication number Publication date
EP2159497A1 (en) 2010-03-03
JP2010054063A (ja) 2010-03-11
EP2159497A8 (en) 2010-04-28

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