EP3101353B1 - Air conditioner indoor unit - Google Patents

Air conditioner indoor unit Download PDF

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Publication number
EP3101353B1
EP3101353B1 EP15743820.1A EP15743820A EP3101353B1 EP 3101353 B1 EP3101353 B1 EP 3101353B1 EP 15743820 A EP15743820 A EP 15743820A EP 3101353 B1 EP3101353 B1 EP 3101353B1
Authority
EP
European Patent Office
Prior art keywords
refrigerant tube
liquid
refrigerant
gas
side nearer
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.)
Active
Application number
EP15743820.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3101353A4 (en
EP3101353A1 (en
Inventor
Tooru ANDOU
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries 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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of EP3101353A1 publication Critical patent/EP3101353A1/en
Publication of EP3101353A4 publication Critical patent/EP3101353A4/en
Application granted granted Critical
Publication of EP3101353B1 publication Critical patent/EP3101353B1/en
Active 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
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
    • 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
    • F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall

Definitions

  • the present invention relates to air conditioner indoor units.
  • connection tube 102 is connected to the indoor heat exchanger 101 and refrigerant is guided by the connection tube 102 to the indoor heat exchanger 101 or an outdoor heat exchanger (not shown).
  • connection tube 102 extends downward from an upper part of the indoor heat exchanger 101, then bends, and extends horizontally.
  • the connection tube 102 is composed of a first refrigerant tube 103 placed on a side nearer to the indoor heat exchanger 101 and a second refrigerant tube 104 placed on a side opposite to the indoor heat exchanger 101.
  • the first refrigerant tube 103 is formed of aluminum or aluminum alloy.
  • the second refrigerant tube 104 is formed of copper or copper alloy.
  • the other end part (which is an end part opposite to the side nearer to the indoor heat exchanger 101) of the first refrigerant tube 103 is connected to one end part (which is an end part on the side nearer to the indoor heat exchanger 101) of the second refrigerant tube 104.
  • a connection 106 between the first refrigerant tube 103 and the second refrigerant tube 104 is provided in a part of the connection tube 102 that extends vertically.
  • a flare union 105 is brazed onto the other end part (which is an end part opposite to the side nearer to the indoor heat exchanger 101) of the second refrigerant tube 104.
  • JP 2013-155892 A discloses features falling under the preamble of claim 1. JP 2002/156134 A is further prior art.
  • connection tube 102 When the indoor unit is installed on a wall inside a room, a worker may have to bend the connection tube 102 depending on an installation site for the indoor unit. Then the worker vertically moves a part of the connection tube 102 that extends horizontally or turns the part around the first refrigerant tube 103. Thus a torsional stress, a bending stress, and/or the like are caused in the connection 106 of the first refrigerant tube 103 and the second refrigerant tube 104.
  • the connection 106 consisting of the different metals is vulnerable to the torsional stress, the bending stress, and the like.
  • the conventional air conditioner indoor unit has a problem in that the connection 106 between the first refrigerant tube 103 and the second refrigerant tube 104 is in great danger of being broken.
  • An object of the invention is to provide an air conditioner indoor unit in which the danger of breakage in the connection between the first refrigerant tube and the second refrigerant tube can be decreased.
  • an air conditioner indoor unit comprises the features of claim 1.
  • connection between the other end part of the first refrigerant tubing and the one end part of the second refrigerant tubing is placed between the end of the bend part on the side nearer to the joint part (i.e., a joint part-side end of the bend part) and the end of the second refrigerant tubing on the side nearer to the joint part (i.e., a joint part-side end of the second refrigerant tubing).
  • a torsional stress, a bending stress, and/or the like that would be caused in the connection part is smaller than a torsional stress, a bending stress, and/or the like that would be caused in the elongate part. Therefore, danger of breakage in the connection can be reduced.
  • connection between the other end part of the first refrigerant tubing and the one end part of the second refrigerant tubing is placed on the side nearer to the joint part with respect to a midpoint between the end of the bend part on the side nearer to the joint part and the end of the second refrigerant tubing on the side nearer to the joint part.
  • connection between the other end part of the first refrigerant tubing and the one end part of the second refrigerant tubing is placed on the side nearer to the joint part with respect to the midpoint between the end of the bend part on the side nearer to the joint part and the end of the second refrigerant tubing on the side nearer to the joint part, a possibility that a great torsional stress, a great bending stress, and/or the like are caused in the connection can reliably be reduced.
  • the air conditioner indoor unit has a casing, an indoor heat exchanger provided in the casing, a first refrigerant tubing formed of aluminum or aluminum alloy and having one end part connected to the indoor heat exchanger, a second refrigerant tubing formed of copper or copper alloy and having one end part connected to the other end part of the first refrigerant tubing, and a joint part connected to the other end part of the second refrigerant tubing.
  • the first refrigerant tubing includes an elongate part that extends along a lateral part of the casing and a bend part that connects with an end part of the elongate part on a side nearer to the joint part and that is bent toward the joint part, and a connection between the other end part of the first refrigerant tubing and the one end part of the second refrigerant tubing is placed between an end of the bend part on the side nearer to the joint part and an end of the second refrigerant tubing on the side nearer to the joint part.
  • connection part when, for example, the second refrigerant tubing is moved relative to the elongate part of the first refrigerant tubing. Therefore, danger of breakage in the connection can be reduced.
  • Fig. 1 is a schematic perspective view of an air conditioner indoor unit in accordance with an embodiment of the invention, as seen looking diagonally from a lower front side.
  • Fig. 2 is a schematic perspective view of the indoor unit, as seen looking diagonally from an upper back side.
  • the indoor unit includes a casing 1 and an indoor heat exchanger 2 (illustrated in Fig. 3 ) provided in the casing 1.
  • Air inlet 1a through which indoor air is taken in is provided on an upper part of the casing 1.
  • An air outlet 1b through which indoor air having passed through the indoor heat exchanger 2 is blown off is provided on a lower part of the casing 1.
  • the air outlet 1b is provided with a wind directing vane 12.
  • a cross-flow fan (not illustrated) is provided downstream of the indoor heat exchanger 2 and upstream of the air outlet 1b.
  • a compressor, a four-way valve, an outdoor heat exchanger, and expansion means (such as expansion valve) of an outdoor unit not illustrated and the indoor heat exchanger 2 are circularly connected so as to form a major part of a refrigerant circuit.
  • Fig. 3 is a back view of the indoor heat exchanger 2 and peripheral parts thereof.
  • the indoor heat exchanger 2 includes a heat exchange part 3 and a plurality of heat exchanger tubes 4, 4, ... that penetrate through the heat exchange part 3.
  • the heat exchange part 3 and the heat exchanger tubes 4 are formed of aluminum or aluminum alloy.
  • the indoor unit includes a first refrigerant tube 5 for liquid, a second refrigerant tube 6 for liquid that communicates with the first refrigerant tube 5 for liquid, a first refrigerant tube 7 for gas, a second refrigerant tube 8 for gas that communicates with the first refrigerant tube 7 for gas, a flare union 9 for liquid, and a flare union 10 for gas.
  • the first refrigerant tube 5 for liquid and the first refrigerant tube 7 for gas are formed of aluminum or aluminum alloy.
  • the second refrigerant tube 6 for liquid and the second refrigerant tube 8 for gas are formed of copper or copper alloy.
  • Each of the first refrigerant tube 5 for liquid and the first refrigerant tube 7 for gas is an example of the first refrigerant tubing.
  • Each of the second refrigerant tube 6 for liquid and the second refrigerant tube 8 for gas is an example of the second refrigerant tubing.
  • Each of the flare union 9 for liquid and the flare union 10 for gas is an
  • the first refrigerant tube 5 for liquid is connected to one end part of a heat exchanger tube 4 through a shunt merger 11.
  • the first refrigerant tube 5 for liquid includes a lateral side straight part 5a that extends along a lateral part of the casing 1, a bend part 5b that connects with an end of the lateral side straight part 5a on a side nearer to the flare union 9 for liquid and that is bent toward the flare union 9 for liquid, and a bottom side straight part 5c that connects with an end of the bend part 5b on the side nearer to the flare union 9 for liquid and that extends along a bottom part of the casing 1.
  • the lateral side straight part 5a is an example of the elongate part.
  • One end part (which is an end part on a side nearer to the bottom side straight part 5c) of the second refrigerant tube 6 for liquid is connected to the other end part (which is an end part on a side nearer to the second refrigerant tube 6 for liquid) of the first refrigerant tube 5 for liquid. More particularly, the end part of the bottom side straight part 5c on the side nearer to the second refrigerant tube 6 for liquid is expanded in diameter in comparison with other parts of the bottom side straight part 5c so that the one end part of the second refrigerant tube 6 for liquid is to be inserted into the end part of the bottom side straight part 5c.
  • the end part of the bottom side straight part 5c on the side nearer to the second refrigerant tube 6 for liquid is fixed to the one end part of the second refrigerant tube 6 for liquid by brazing filler metal between the end part and the one end part of the second refrigerant tube 6 for liquid.
  • the end part of the bottom side straight part 5c on the side nearer to the second refrigerant tube 6 for liquid and peripheral parts thereof are inserted into a heat shrinkable tube so as not to be exposed.
  • the flare union 9 for liquid is connected to the other end part of the second refrigerant tube 6 for liquid.
  • connection between the other end part of the first refrigerant tube 5 for liquid and the one end part of the second refrigerant tube 6 for liquid is placed between the end of the bend part 5b on the side nearer to the flare union 9 for liquid and the end of the second refrigerant tube 6 for liquid on the side nearer to the flare union 9 for liquid. More precisely, the connection is placed on the side nearer to the flare union 9 for liquid with respect to a midpoint between the end of the bend part 5b on the side nearer to the flare union 9 for liquid and the end of the second refrigerant tube 6 for liquid on the side nearer to the flare union 9 for liquid.
  • the first refrigerant tube 7 for gas is connected to one end part of another heat exchanger tube 4 through a shunt merger (not illustrated).
  • the first refrigerant tube 7 for gas includes a lateral side straight part 7a that extends along the lateral part of the casing 1, a bend part 7b that connects with an end of the lateral side straight part 7a on a side nearer to the flare union 10 for gas and that is bent toward the flare union 10 for gas, and a bottom side straight part 7c that connects with an end of the bend part 7b on the side nearer to the flare union 10 for gas and that extends along the bottom part of the casing 1.
  • the lateral side straight part 7a is an example of the elongate part.
  • One end part (which is an end part on a side nearer to the bottom side straight part 7c) of the second refrigerant tube 8 for gas is connected to the other end part (which is an end part on a side nearer to the second refrigerant tube 8 for gas) of the first refrigerant tube 7 for gas. More particularly, the end part of the bottom side straight part 7c on the side nearer to the second refrigerant tube 8 for gas is expanded in diameter in comparison with other parts of the bottom side straight part 7c so that the one end part of the second refrigerant tube 8 for gas is to be inserted into the end part.
  • the end part of the bottom side straight part 7c on the side nearer to the second refrigerant tube 8 for gas is fixed to the one end part of the second refrigerant tube 8 for gas by brazing filler metal between the end part and the one end part of the second refrigerant tube 8 for gas.
  • the end part of the bottom side straight part 7c on the side nearer to the second refrigerant tube 8 for gas and peripheral parts thereof are inserted into a heat shrinkable tube so as not to be exposed.
  • the flare union 10 for gas is connected to the other end part of the second refrigerant tube 8 for gas.
  • connection between the other end part of the first refrigerant tube 7 for gas and the one end part of the second refrigerant tube 8 for gas is placed between the end of the bend part 7b on the side nearer to the flare union 10 for gas and the end of the second refrigerant tube 8 for gas on the side nearer to the flare union 10 for gas. More precisely, the connection is placed on the side nearer to the flare union 10 for gas with respect to a midpoint between the end of the bend part 7b on the side nearer to the flare union 10 for gas and the end of the second refrigerant tube 8 for gas on the side nearer to the flare union 10 for gas.
  • the bottom side straight part 5c of the first refrigerant tube 5 for liquid and the second refrigerant tube 6 for liquid may be moved toward the lateral side straight part 5a of the first refrigerant tube 5 for liquid, as illustrated in Fig. 4 .
  • a torsional stress, a bending stress, and/or the like are caused in the lateral side straight part 5a, whereas there is little danger of breakage in the lateral side straight part 5a because no connection of different metals is provided in the lateral side straight part 5a.
  • a torsional stress, a bending stress, and/or the like that are caused between the end of the bend part 5b on the side nearer to the flare union 9 for liquid and the end of the second refrigerant tube 6 for liquid on the side nearer to the flare union 9 for liquid are smaller than the torsional stress, the bending stress, and/or the like that are caused in the lateral side straight part 5a of the first refrigerant tube 5 for liquid.
  • connection between the other end part of the first refrigerant tube 5 for liquid and the one end part of the second refrigerant tube 6 for liquid is placed between the end of the bend part 5b on the side nearer to the flare union 9 for liquid and the end of the second refrigerant tube 6 for liquid on the side nearer to the flare union 9 for liquid.
  • connection between the other end part of the first refrigerant tube 5 for liquid and the one end part of the second refrigerant tube 6 for liquid is placed on the side nearer to the flare union 9 for liquid with respect to the midpoint between the end of the bend part 5b on the side nearer to the flare union 9 for liquid and the end of the second refrigerant tube 6 for liquid on the side nearer to the flare union 9 for liquid.
  • the heat exchange part 3 and the heat exchanger tubes 4 are formed of aluminum or aluminum alloy and thus production costs can be reduced.
  • connection between the other end part of the first refrigerant tube 5 for liquid and the one end part of the second refrigerant tube 6 for liquid is placed on the side nearer to the flare union 9 for liquid with respect to the midpoint between the end of the bend part 5b on the side nearer to the flare union 9 for liquid and the end of the second refrigerant tube 6 for liquid on the side nearer to the flare union 9 for liquid in the embodiment, the connection may be placed on the side nearer to the bend part 5b with respect to the midpoint between the end of the bend part 5b on the side nearer to the flare union 9 for liquid and the end of the second refrigerant tube 6 for liquid on the side nearer to the flare union 9 for liquid.
  • connection between the other end of the first refrigerant tube 7 for gas and the one end of the second refrigerant tube 8 for gas is placed on the side nearer to the flare union 10 for gas with respect to the midpoint between the end of the bend part 7b on the side nearer to the flare union 10 for gas and the end of the second refrigerant tube 8 for gas on the side nearer to the flare union 10 for gas in the embodiment, the connection may be placed on the side nearer to the bend part 7b with respect to the midpoint between the end of the bend part 7b on the side nearer to the flare union 10 for gas and the end of the second refrigerant tube 8 for gas on the side nearer to the flare union 10 for gas.
  • the first refrigerant tube 5 for liquid, the second refrigerant tube 6 for liquid, the first refrigerant tube 7 for gas, and the second refrigerant tube 8 for gas may be integrated by being covered with heat insulator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP15743820.1A 2014-01-30 2015-01-06 Air conditioner indoor unit Active EP3101353B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014015377A JP5861723B2 (ja) 2014-01-30 2014-01-30 空気調和機の室内ユニット
PCT/JP2015/050130 WO2015115127A1 (ja) 2014-01-30 2015-01-06 空気調和機の室内ユニット

Publications (3)

Publication Number Publication Date
EP3101353A1 EP3101353A1 (en) 2016-12-07
EP3101353A4 EP3101353A4 (en) 2017-05-17
EP3101353B1 true EP3101353B1 (en) 2018-07-11

Family

ID=53756705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15743820.1A Active EP3101353B1 (en) 2014-01-30 2015-01-06 Air conditioner indoor unit

Country Status (6)

Country Link
EP (1) EP3101353B1 (ja)
JP (1) JP5861723B2 (ja)
CN (1) CN105917173B (ja)
AU (1) AU2015212207B2 (ja)
ES (1) ES2678749T3 (ja)
WO (1) WO2015115127A1 (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6719394B2 (ja) * 2017-01-16 2020-07-08 日立ジョンソンコントロールズ空調株式会社 熱交換器の接続配管構造、及び、空気調和機
WO2018137418A1 (zh) * 2017-01-25 2018-08-02 珠海格力电器股份有限公司 蒸发器和空调器
KR102296771B1 (ko) * 2017-03-31 2021-09-02 엘지전자 주식회사 공기 조화기의 실내기
JP6673318B2 (ja) * 2017-12-05 2020-03-25 ダイキン工業株式会社 空調機
DE112019007837T5 (de) * 2019-10-24 2022-07-14 Mitsubishi Electric Corporation Inneneinheit einer Klimaanlage
JP2023051346A (ja) 2021-09-30 2023-04-11 ダイキン工業株式会社 空気調和装置の室内ユニットおよび空気調和装置
JP7133076B1 (ja) * 2021-09-30 2022-09-07 ダイキン工業株式会社 熱交換ユニットおよび空気調和機
JP7323819B2 (ja) * 2021-09-30 2023-08-09 ダイキン工業株式会社 室内熱交換器の製造方法
JP2023051205A (ja) * 2021-09-30 2023-04-11 ダイキン工業株式会社 室内機および空気調和機
JP7410418B2 (ja) * 2021-09-30 2024-01-10 ダイキン工業株式会社 室内機および空気調和機

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JP2877658B2 (ja) * 1993-04-15 1999-03-31 三洋電機株式会社 空気調和機
JP3899173B2 (ja) * 1997-12-17 2007-03-28 昭和電工株式会社 熱交換器
JP2000055452A (ja) * 1998-08-05 2000-02-25 Hitachi Ltd 空気調和機
JP3534100B2 (ja) * 2001-10-15 2004-06-07 株式会社日立製作所 ルームエアコン
JP2005055081A (ja) * 2003-08-05 2005-03-03 Matsushita Electric Ind Co Ltd 熱交換器及び熱交換器を備えた自動販売機
JP5388969B2 (ja) * 2010-08-23 2014-01-15 三菱電機株式会社 熱交換器及びこの熱交換器が搭載された空気調和機
CZ21751U1 (cs) * 2010-10-08 2011-02-14 Lloyd Coils Europe, S.R.O. Pevný spoj medené a hliníkové trubky chladicího okruhu
CN202204212U (zh) * 2011-07-26 2012-04-25 广东美的电器股份有限公司 带铜铝接头的空调用换热器
WO2013084433A1 (ja) * 2011-12-09 2013-06-13 パナソニック株式会社 空気調和機の熱交換器
JP5881435B2 (ja) 2012-01-27 2016-03-09 三菱電機株式会社 熱交換器及びこれを備えた空気調和機

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Also Published As

Publication number Publication date
CN105917173B (zh) 2017-06-30
WO2015115127A1 (ja) 2015-08-06
AU2015212207A1 (en) 2016-08-11
ES2678749T3 (es) 2018-08-17
CN105917173A (zh) 2016-08-31
AU2015212207B2 (en) 2016-09-22
JP2015140998A (ja) 2015-08-03
EP3101353A4 (en) 2017-05-17
EP3101353A1 (en) 2016-12-07
JP5861723B2 (ja) 2016-02-16

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