EP2716991B1 - Innenraumeinheit einer Klimaanlage - Google Patents

Innenraumeinheit einer Klimaanlage Download PDF

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Publication number
EP2716991B1
EP2716991B1 EP13186988.5A EP13186988A EP2716991B1 EP 2716991 B1 EP2716991 B1 EP 2716991B1 EP 13186988 A EP13186988 A EP 13186988A EP 2716991 B1 EP2716991 B1 EP 2716991B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
pipe cover
indoor heat
indoor
disposed
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
EP13186988.5A
Other languages
English (en)
French (fr)
Other versions
EP2716991A3 (de
EP2716991A2 (de
Inventor
Kunihiro HIGASHIURA
Yasuhiro Naito
Hironori Mori
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 Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems 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 Mitsubishi Heavy Industries Thermal Systems Ltd filed Critical Mitsubishi Heavy Industries Thermal Systems Ltd
Publication of EP2716991A2 publication Critical patent/EP2716991A2/de
Publication of EP2716991A3 publication Critical patent/EP2716991A3/de
Application granted granted Critical
Publication of EP2716991B1 publication Critical patent/EP2716991B1/de
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
    • 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
    • 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
    • F24F1/0068—Indoor units, e.g. fan coil units characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing
    • 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
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for

Definitions

  • the present invention relates to an indoor unit of an air conditioner equipped with a pipe cover that covers a front of a heat exchanger piping exposed from an end portion of an indoor heat exchanger.
  • An indoor unit of an air conditioner includes an indoor heat exchanger, an indoor fan, a drain pan, a control box, and others in a unit body of the indoor unit, and a front cover assembly is detachably disposed at a front of this unit body, and in such an indoor unit using a plate fin and tube type heat exchanger as the indoor heat exchanger, dew-condensation may be generated on a surface of the heat exchanger piping outwardly projecting from its side plate during a cooling operation.
  • a pipe cover for covering the front of the heat exchanger piping is disposed at an end portion of the indoor heat exchanger (see Patent Literature 1, for example).
  • the pipe cover is fixedly disposed between the end portion of the indoor heat exchanger and the unit body, or the control box fixedly disposed in the unit body, or the like.
  • the pipe cover is configured to cover the front of the heat exchanger piping that outwardly projects from the end portion of the indoor heat exchanger, thereby preventing dew-condensed water from splashing to the surroundings when it drops down from the heat exchanger piping, and leading the dew-condensed water to the drain pan.
  • the pipe cover is fixedly disposed between the end portion of the indoor heat exchanger and the unit body, or other equipment fixedly disposed in the unit body. Therefore, if the indoor unit falls down while the indoor unit is being transported or conveyed, an impact load from the indoor heat exchanger is directly applied to the pipe cover. Such an impact load may cause breakage and damage to the pipe cover, to the unit body to which the pipe cover is fixedly disposed, or to other equipment fixedly disposed in the unit body.
  • the pipe cover is disposed at the front of the end portion of the indoor heat exchanger, a contact portion of the pipe cover to the front of the heat exchanger has a shape corresponding to the shape of the front of the end portion of the indoor heat exchanger.
  • the indoor unit may sometimes be adjusted for changes in capacity by altering the size of the indoor heat exchanger.
  • a kind of an auxiliary heat exchanger is disposed at the front of the indoor heat exchanger with a small capacity so as to scale up the capacity of the heat exchanger, which brings about such inconvenience that a different pipe cover is required for this scaled-up heat exchanger.
  • An object of the present invention which has been made in order to solve the problems according to the conventional art, is to provide an indoor unit of an air conditioner capable of preventing breakage and damage to a pipe cover, and to other equipment when the indoor unit falls down, and also capable of providing the pipe cover commonly used for the indoor heat exchangers of different capacities.
  • An indoor unit of an air conditioner is including: a unit body in which an indoor heat exchanger is disposed; and a pipe cover that covers a front of an exposed portion of heat exchanger piping at an end portion of the indoor heat exchanger, and that prevents water drops dew-condensed on a surface of the heat exchanger piping from splashing, wherein the pipe cover includes: an end fixing portion fixedly disposed to the heat exchanger piping of the indoor heat exchanger; a counter-end fixing portion fixedly disposed to the unit body, or to other equipment fixedly disposed in the unit body; and an impact absorbing portion provided at an appropriate position between the end fixing portion and the counter-end fixing portion of the pipe cover.
  • the impact absorbing portion may include a U-shaped curved portion formed in a vicinity of the counter-end fixing portion.
  • the impact load applied to the pipe cover from the indoor heat exchanger can be absorbed and reduced with deflection of the U-shaped curved portion formed in the vicinity of the counter-end fixing portion for fixing the pipe cover to the unit body, or to other equipment disposed in the unit body. Accordingly, it is possible to securely prevent breakage to the pipe cover, or breakage and damage to the unit body to which the pipe cover is fixed, or to other equipment disposed in the unit body when the indoor unit falls down.
  • the pipe cover may include knockout portions integrally formed with the pipe cover at a contact portion thereof to a surface of the end portion of the indoor heat exchanger so as to allow the pipe cover to be commonly used for the indoor heat exchangers of different capacities (for a change in capacity of the indoor heat exchanger).
  • the knockout portions may be selectively used depending on the capacity of the indoor heat exchanger; specifically, in the case of using the basic capacity, the knockout portions of the pipe cover are used as they are, and in the case of using a scaled-up capacity, the knockout portions of the pipe cover are removed, thereby allowing the pipe cover of a single kind to be commonly used.
  • the pipe cover may include a protective wall integrally formed therewith, which covers a front of a ground stopper disposed at the end portion of the indoor heat exchanger.
  • this configuration can enhance a protective function against accidental electric shock and others, and also can reduce the number of component members by eliminating special protective covers.
  • an impact load is applied from the indoor heat exchanger to the pipe cover fixed between the indoor heat exchanger and the unit body, or other equipment disposed in the unit body, and this impact load can be absorbed and reduced by the impact absorbing portion of the pipe cover. Accordingly, when the indoor unit falls down, it is possible to prevent breakage and damage to the pipe cover, to the unit body to which the pipe cover is fixed, or to other equipment disposed in the unit body.
  • Fig. 1 shows a front view of an indoor unit of an air conditioner according to the present embodiment of the present invention with a front cover assembly of the indoor unit removed
  • Fig. 2 is a perspective view thereof
  • Fig. 3 is an enlarged view of the vicinity of a portion where the pipe cover is disposed
  • Fig. 4 is a drawing showing a configuration of the pipe cover.
  • the indoor unit 1 of an air conditioner includes a base 3, and a unit body 2 including a front cover assembly (not shown) detachably assembled at the front of the base 3.
  • the front cover assembly is assembled to the base 3 so as to cover the upper face, front face, and right and left faces of the above each equipment assembled to the base 3.
  • This front cover assembly is provided with a suction grille for sucking room air into the unit body 2, and an air filter disposed on a rear face of the grille, and further, a filter cleaning mechanism and the like for self-cleaning the air filter may be optionally incorporated.
  • the indoor heat exchanger 4 is configured to be a plate fin and tube type heat exchanger, and air shield plates 9 for blocking a bypass of air flow is disposed at the folded or divided portion of the indoor heat exchanger 4.
  • the plate fin and tube type heat exchanger is usually configured in such a manner that multiple plate fins 10 are installed between right and left side plates of the hair pin tubes, and thereafter each hair pin tube is expanded in diameter so as to allow the tubes, the fins, and the side plates to tightly contact to one another, and opening ends of every two adjacent hair pin tubes are connected to each other through a U bent pipe 11, thereby forming a serpentine piping passage; and the heat exchanger piping 12 including the U bent pipes 11 and the bent portions of the hair pin tubes projects from the right and left side plates of the heat exchanger.
  • a low pressure coolant flows through the indoor heat exchanger 4 when the indoor unit 1 equipped with the indoor heat exchanger 4 is in cooling operation or dehumidifying operation, so that moisture in the air becomes dew-condensed on the surface of the heat exchanger piping 12 outwardly projecting from the end portion of the indoor heat exchanger 4, and then becomes water drops to drop down. If such water drops drop on component members disposed below, and splash to the surroundings, it may bring about various inconveniences. Particularly, on the right side of the indoor heat exchanger 4 where the control box 8 is disposed, such water drops may cause influences on electric systems, or water leakage to the room, etc.; therefore, the front of the heat exchanger piping 12, that is, the front of the end portion of the indoor heat exchanger 4 is covered with the pipe cover 13.
  • this pipe cover 13 includes a cover body 14 for preventing the dew-condensed water from splashing, an end fixing portion 15 for fixedly disposing one end of the pipe cover 13 to the end portion of the indoor heat exchanger 4, a counter-end fixing portion 16 for fixedly disposing the other end of the pipe cover 13 to the control box 8 that is other equipment in the unit body 2, an impact absorbing portion 17 for absorbing and reducing an impact load applied from the indoor heat exchanger 4 to the pipe cover 13 when the indoor unit 1 falls down during being transported or conveyed, knockout portions 18, 19 selectively used depending on the capacity of the indoor heat exchanger 4, and to be removed in the case of scaling up the capacity of the indoor heat exchanger 4, and a protective wall 20 for covering the front of a ground stopper disposed at the end portion of the indoor heat exchanger 4.
  • the cover body 14 has a shape that covers the right end portion of the indoor heat exchanger 4 in the vertical direction, and particularly, the cover body 14 has a greater width at a portion that covers the front of a gap between the right end portion of the indoor heat exchanger 4 and the control box (other equipment) 8.
  • the end fixing portion 15 that is fixedly disposed at the end portion of the indoor heat exchanger 4 serves as a fitting portion to be fixedly fit on the heat exchanger piping 12 outwardly projecting from one end portion of the indoor heat exchanger 4.
  • the counter-end fixing portion 16 fixedly disposed to the control box 8 is formed in a flange having holes 22 to be fixed to one surface of the control box 8 with screws 21.
  • the impact absorbing portion 17 is a U-shaped curved portion formed between the cover body 14 and the counter-end fixing portion 16 extending from the cover body 14.
  • the knockout portions 18, 19 are integrally formed with the cover body 14 at its contact portions to the surface of the end portion of the indoor heat exchanger 4. In the case of using the indoor heat exchanger 4 with the basic capacity, the knockout portions 18, 19 are used as they are; and in the case of installing a kind of an auxiliary heat exchanger at the front of the indoor heat exchanger 4 so as to scale up the capacity of the indoor heat exchanger 4 for the sake of providing the indoor unit 1 with large capacity specifications, the knockout portions 18, 19 are removed.
  • the protective wall 20 is a wall integrally extending from the lower portion of the cover body 14 in the lateral direction.
  • the protective wall 20 has a dimension large enough to cover the front of the ground stopper 23 (see Fig. 3 ) that fixes a terminal of a ground wire extending from the control box 8 to one end of the lower portion of the indoor heat exchanger 4.
  • the lower edge of the cover body 14 is formed to be a slanted edge so that water drops drop down from a slanted front end 24 of the slanted edge into the drain pan 5 so as to be collected through the drain pan 5.
  • the outer surface of the cover body 14 is integrally formed with the appropriate number of reinforcing ribs 25.
  • the indoor heat exchanger 4 in the indoor unit 1 functions as an evaporator. Through this function, the room air circulating through the indoor fan can be cooled and dehumidified, and the cooled and dehumidified air is allowed to blow into the room, thereby cooling and dehumidifying the room air.
  • the end portion of the indoor heat exchanger 4 through which the low pressure coolant flows moisture in the air is dew-condensed on the surface of the heat exchanger piping 12 outwardly projecting, and becomes water drops, and they may drop down.
  • the pipe cover 13 is disposed in order to prevent the water drops from splashing to the surroundings, and leaking out to the room, and the water drops can be collected through the pipe cover 13 into the drain pan 5, and discharged outside the room.
  • the pipe cover 13 is fixed in such a manner that the end fixing portion 15 is fixedly fit on the heat exchanger piping 12 located at the end portion of the indoor heat exchanger 4, and the counter-end fixing portion 16 is fixed with screws 21 through the flange thereof to one surface of the control box 8 that is equipment housed in the unit body 2.
  • the indoor unit 1 is packaged in a corrugated cardboard box for convenience of transportation and conveyance, and may fall down while being transported and conveyed. In this case, an impact load applied to the indoor heat exchanger 4 is applied to the pipe cover 13 from the indoor heat exchanger 4.
  • the impact absorbing portion 17 is disposed at an appropriate position between the end fixing portion 15 and the counter-end fixing portion 16 of the pipe cover 13.
  • the impact absorbing portion 17 is constituted by a U-shaped curved portion formed in the vicinity of the counter-end fixing portion 16. Hence, when the indoor unit 1 falls down, the impact load applied to the pipe cover 13 from the indoor heat exchanger 4 can be absorbed and reduced with deflection of the U-shaped curved portion. Accordingly, it is possible to securely prevent breakage to the pipe cover 13, or breakage and damage to the unit body 2 to which the pipe cover 13 is fixed, or to other equipment such as the control box 8 disposed in the unit body 2 when the indoor unit 1 falls down.
  • the knockout portions 18, 19 are integrally formed with the pipe cover 13 at its contact portion to the surface of the end portion of the indoor heat exchanger 4 so that the pipe cover 13 can commonly be used for a change in capacity of the indoor heat exchanger 4.
  • the knockout portions 18, 19 may be selectively used depending on the capacity of the indoor heat exchanger 4; specifically, in the case of using the indoor heat exchanger 4 with the basic capacity, the knockout portions 18, 19 of the pipe cover 13 are used as they are, and in the case of using the indoor heat exchanger 4 with a scaled-up capacity, the knockout portions 18, 19 of the pipe cover 13 are removed, thereby allowing the pipe cover 13 of a single kind to be commonly used.
  • the protective wall 20 is integrally formed with the pipe cover 13 such that the protective wall 20 covers the front of the ground stopper 23 disposed at the end portion of the indoor heat exchanger 4.
  • the counter-end fixing portion 16 of the pipe cover 13 is fixedly disposed to one surface of the control box 8, but the present invention is not limited to this.
  • the counter-end fixing portion 16 of the pipe cover 13 may be directly fixedly disposed to the unit body 2, or may be fixedly disposed to equipment other than the control box 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Claims (4)

  1. Innenraumeinheit (1) einer Klimaanlage, dadurch gekennzeichnet, dass sie umfasst:
    einen Einheitskörper (2), in welchem einen Innenraum-Wärmetauscher (4) angeordnet ist; und
    eine Rohrabdeckung (13), die eine Vorderseite eines freiliegenden Abschnitts einer Wärmetauscher-Rohrleitung (12) an einem Endabschnitt des Innenraum-Wärmetauschers (4) abdeckt, und die Spritzen von auf einer Oberfläche der Wärmetauscher-Rohrleitung (12) taukondensierten Wassertropfen verhindert,
    dadurch gekennzeichnet, dass
    die Rohrabdeckung umfasst: einen Endbefestigungsabschnitt (15), der an der Wärmetauscher-Rohrleitung (12) des Innenraum-Wärmetauschers (4) fest angeordnet ist; einen Gegen-Endbefestigungsabschnitt (16), der am Einheitskörper (2) oder einer anderen Einrichtung (8) fest angeordnet ist, die fest im Einheitskörper angeordnet ist; und
    einen Stoßabsorptionsabschnitt (17), der in einer geeigneten Position zwischen dem Endbefestigungsabschnitt (15) und dem Gegen-Endbefestigungsabschnitt (16) der Rohrabdeckung vorgesehen ist.
  2. Innenraumeinheit (1) einer Klimaanlage nach Anspruch 1, wobei
    der Stoßabsorptionsabschnitt (17) einen U-förmigen gekrümmten Abschnitt umfasst, der in einer Nachbarschaft des Gegen-Befestigungsabschnitts (16) ausgebildet ist.
  3. Innenraumeinheit (1) einer Klimaanlage nach Anspruch 1 oder Anspruch 2, wobei
    die Rohrabdeckung (13) abnehmbare Abschnitte (18, 19) umfasst, die mit der Rohrabdeckung (13) an einem Kontaktabschnitt davon mit einer Oberfläche des Endabschnitts des Innenraum-Wärmetauschers (4) einstückig ausgebildet sind, um zu ermöglichen, dass die Rohrabdeckung allgemein für eine Änderung der Kapazität des Innenraum-Wärmetauschers (4) verwendet wird.
  4. Innenraumeinheit (1) einer Klimaanlage nach einem der Ansprüche 1 bis 3, wobei
    die Rohrabdeckung (13) eine Schutzwand (20) umfasst, die einstückig damit ausgebildet ist, um eine Vorderseite eines Erdungsanschlags (23) abzudecken, der am Endabschnitt des Innenraum-Wärmetauschers (4) angeordnet ist.
EP13186988.5A 2012-10-05 2013-10-02 Innenraumeinheit einer Klimaanlage Active EP2716991B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012223487A JP6195433B2 (ja) 2012-10-05 2012-10-05 空気調和機の室内ユニット

Publications (3)

Publication Number Publication Date
EP2716991A2 EP2716991A2 (de) 2014-04-09
EP2716991A3 EP2716991A3 (de) 2018-04-18
EP2716991B1 true EP2716991B1 (de) 2019-03-20

Family

ID=49322202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13186988.5A Active EP2716991B1 (de) 2012-10-05 2013-10-02 Innenraumeinheit einer Klimaanlage

Country Status (3)

Country Link
EP (1) EP2716991B1 (de)
JP (1) JP6195433B2 (de)
ES (1) ES2720902T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3751215B1 (de) * 2018-02-09 2023-08-23 Mitsubishi Electric Corporation Rohrlayoutstruktur und innenraumeinheit einer klimaanlage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016038170A (ja) * 2014-08-08 2016-03-22 三菱電機株式会社 空気調和機の室内機

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Publication number Priority date Publication date Assignee Title
JPH10227472A (ja) * 1997-02-14 1998-08-25 Mitsubishi Heavy Ind Ltd 空気調和機
JP3735179B2 (ja) * 1997-03-28 2006-01-18 三菱重工業株式会社 空気調和機
JP3676547B2 (ja) * 1997-08-29 2005-07-27 東芝キヤリア株式会社 空気調和機
JPH11264572A (ja) * 1998-03-19 1999-09-28 Fujitsu General Ltd 空気調和機
JP2004020144A (ja) * 2002-06-20 2004-01-22 Matsushita Electric Ind Co Ltd 空気調和機
WO2006098436A1 (ja) * 2005-03-18 2006-09-21 Toshiba Carrier Corporation 空気調和装置の室内機
JP2006323084A (ja) * 2005-05-18 2006-11-30 Alps Electric Co Ltd 液晶表示装置
JP4888435B2 (ja) * 2008-04-25 2012-02-29 株式会社富士通ゼネラル 空気調和機
JP2010078220A (ja) * 2008-09-25 2010-04-08 Daikin Ind Ltd 床置型室内機
JP2010078255A (ja) * 2008-09-26 2010-04-08 Mitsubishi Heavy Ind Ltd 空気調和装置
JP2010121880A (ja) * 2008-11-20 2010-06-03 Daikin Ind Ltd 空気調和機
JP2011058779A (ja) * 2009-09-14 2011-03-24 Sharp Corp 空気調和機の室内機

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3751215B1 (de) * 2018-02-09 2023-08-23 Mitsubishi Electric Corporation Rohrlayoutstruktur und innenraumeinheit einer klimaanlage

Also Published As

Publication number Publication date
ES2720902T3 (es) 2019-07-25
EP2716991A3 (de) 2018-04-18
JP6195433B2 (ja) 2017-09-13
JP2014074574A (ja) 2014-04-24
EP2716991A2 (de) 2014-04-09

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