EP3550218B1 - Air conditioner indoor unit - Google Patents

Air conditioner indoor unit Download PDF

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Publication number
EP3550218B1
EP3550218B1 EP16904842.8A EP16904842A EP3550218B1 EP 3550218 B1 EP3550218 B1 EP 3550218B1 EP 16904842 A EP16904842 A EP 16904842A EP 3550218 B1 EP3550218 B1 EP 3550218B1
Authority
EP
European Patent Office
Prior art keywords
engagement member
indoor
protruding piece
plate springs
panel
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
EP16904842.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3550218A1 (en
EP3550218A4 (en
Inventor
Koji Yamaguchi
Tetsuya Tazawa
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 EP3550218A1 publication Critical patent/EP3550218A1/en
Publication of EP3550218A4 publication Critical patent/EP3550218A4/en
Application granted granted Critical
Publication of EP3550218B1 publication Critical patent/EP3550218B1/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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • 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
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F24F13/084—Grilles, registers or guards with mounting arrangements, e.g. snap fasteners for mounting to the wall or duct
    • 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
    • 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

Definitions

  • the present invention relates to an indoor unit of a ceiling-concealed type, which is to be installed in a space above a ceiling, and more particularly, to an indoor unit for an air-conditioning apparatus, which includes a suction panel configured to open and close an opening in a lower surface of the indoor unit.
  • Patent Literature 1 JP 2009-299999 A
  • a typical decorative panel is formed of a resin material.
  • the engagement members and the plate springs are each formed by molding with use of a resin material.
  • the resin material there may occur variation in thermal stress, flowability, and other factors during die molding, thus leading to variation of a molded component itself and variation of a resin component.
  • backlash between components at the time of assembling of the decorative panel is concerned.
  • influence on the durability, which is caused by stress applied to supporting point portions of the plate springs when functions of the plate springs are exhibited, is also concerned.
  • the present invention has been made to overcome the problem described above, and has an object to provide an indoor unit for an air-conditioning apparatus capable of suppressing backlash at the time of assembling, which is caused due to molding variation, and capable of enhancing the durability by increasing the number of supporting points when functions of plate springs are exhibited to disperse stress.
  • an indoor unit for an air-conditioning apparatus including: an indoor-unit main body including a heat exchanger and a fan and having an opening formed in a lower surface of the indoor-unit main body; a decorative panel configured to cover a peripheral edge portion of the opening of the indoor-unit main body; a suction panel configured to cover an opening of the indoor-unit main body in an openable manner, the indoor unit main body being formed by the decorative panel, and having an air inlet communicating with the opening; a protruding piece protruding horizontally from the decorative panel toward the opening of the indoor-unit main body; an engagement member provided on a back surface of the suction panel at a position of being opposed to the protruding piece to be slidable with respect to the protruding piece in a front-and-back direction of the indoor unit, the engagement member being configured to be guided by the protruding piece of the decorative panel to be locked to the protruding piece; plate springs, provided at both ends in
  • the indoor unit for an air-conditioning apparatus includes the plate springs, provided at both ends in a direction orthogonal to a sliding direction of the engagement member, the plate springs extending in directions opposite to each other to be orthogonal to the sliding direction; and at least two spring support portions, formed on the suction panel, and configured to sandwich both end surfaces of each of the plate springs, the two spring support portions being provided at different positions of the engagement member.
  • the plate spring is supported by the at least two spring support portions.
  • the spring support portions are arranged in an opposing direction.
  • Fig. 1 is a perspective view for illustrating an indoor unit for an air-conditioning apparatus according to an embodiment of the present invention when viewed from a lower side.
  • Fig. 2 is a transverse sectional view for schematically illustrating an interior of the indoor unit of Fig. 1 .
  • Fig. 3 is a perspective view for illustrating a state in which a suction grille of Fig. 1 is opened.
  • an indoor unit 100 for an air-conditioning apparatus includes an indoor-unit main body 10, which receives heat exchangers 11 and a fan 12 and has an opening formed in a lower surface, a decorative panel 13 configured to cover a peripheral edge portion of the opening of the indoor-unit main body 10, and a suction panel 14 configured to cover the opening of the indoor-unit main body 10, which is formed by the decorative panel 13, in an openable manner.
  • the indoor unit 100 is of a ceiling-concealed type in which the decorative panel 13 and the suction panel 14 are exposed from a ceiling board 200, and in which the indoor-unit main body 10 is installed on an inner side of the ceiling board 200.
  • the indoor unit 100 is connected to an outdoor unit (not shown) by a refrigerant pipe.
  • the indoor-unit main body 10 is formed of sheet metal having a rectangular parallelepiped shape and having the lower surface being opened.
  • the suction panel 14 is formed into a rectangular shape being a quadrangular shape along a longitudinal direction of the indoor-unit main body 10, and has air inlets 15 and 16 each formed to be elongated by a plurality of grilles at both ends in a transverse direction.
  • the suction panel 14 is formed by resin molding.
  • the decorative panel 13 is fixed to the indoor-unit main body 10.
  • An air outlet 17 is formed in the decorative panel 13 at a portion on the air inlet 15 side of the indoor-unit main body 10.
  • An air-direction vane 17a configured to change a blowing direction of air is mounted to the air outlet 17.
  • One side of the suction panel 14 on the air inlet 16 side is supported in a turnable manner by a support shaft 20 mounted to the indoor-unit main body 10.
  • the suction panel 14 can open and close the opening of the indoor-unit main body 10 through intermediation of the support shaft 20.
  • a pair of engagement members 30 is mounted on one side of the suction panel 14 on the air inlet 15 side. The pair of engagement members 30 is configured to keep a closing state of the suction panel 14 when the opening of the indoor-unit main body 10 is closed by the suction panel 14.
  • the suction panel 14 is configured to be openable and closable to enable replacement of air filters 18a and 18b described later and cleaning work inside the indoor-unit main body 10.
  • the air filters 18b and 18a described above are removably mounted to back surfaces of the air inlets 15 and 16, and are configured to collect dust contained in air flowing into the indoor-unit main body 10 through the air inlets 15 and 16.
  • the fan 12 includes, for example, a turbofan arranged in an air passage 19 communicating with the air outlet 17, and a motor (not shown) installed on one side of the turbofan in an axial center direction.
  • the heat exchangers 11 are arranged between the fan 12, and the air inlets 15 and 16, respectively, to be installed in a V-shape.
  • indoor air is sucked through the air inlets 15 and 16 of the suction panel 14, and passes through each of the air filters 18a and 18b to flow into the indoor-unit main body 10.
  • the air flowing into the indoor-unit main body 10 is further sucked by the fan 12 to the heat exchangers 11 side and subjected to heat exchange with refrigerant flowing through the heat exchangers 11. Then, the air subjected to the heat exchange is sent into the air passage 19, and is blown out to an indoor space through the air outlet 17.
  • Fig. 4 is an enlarged perspective view of the engagement member illustrated in Fig. 3 .
  • Fig. 5 is a plan view for illustrating a state in which the engagement member illustrated in Fig. 4 is arranged on the suction grille.
  • Fig. 6 is a plan view for illustrating a state in which the engagement member illustrated in Fig. 5 is supported on the suction grille to be slidable.
  • Fig. 7 is a plan view for illustrating a state in which the engagement member of Fig. 6 is retreated.
  • the engagement member 30 includes an engagement portion 32, guide portions 33, fitting grooves 34, an operating portion 35, a pair of sliding portions 36 formed between the guide portions 33, and an elongated hole 37 formed by the pair of sliding portions 36.
  • the engagement portion 32 is a protrusion protruding downward from distal end portions of the guide portions 33 of the engagement member 30.
  • the guide portions 33 protrude upward from positions of both ends on an upper surface of the engagement member 30 on a side on which the fitting grooves 34 are formed.
  • the guide portions 33 include inclined surfaces inclined from a distal end portion opposed to a protruding piece 13a (see Fig. 8 ) described later to a rear end portion side of the engagement member 30.
  • the plate springs 31 are fitted into the fitting grooves 34, respectively.
  • the plate springs 31 extend to be orthogonal to a sliding direction of the engagement member 30, from both ends in the direction orthogonal to the sliding direction, and in directions opposite to each other.
  • the operating portion 35 is formed on a rear portion of the engagement member 30 to extend downward.
  • the sliding portions 36 are each formed into a plate shape extending to a front side and a rear side of the engagement member 30, and a stepped screw 42 described later is placed on the sliding portions 36 through intermediation of a washer 43.
  • the elongated hole 37 is formed to be elongated in a front-and-back direction of the engagement member 30, and the stepped screw 42 is inserted through the elongated hole 37.
  • the engagement member 30 described above is installed at a portion of the suction panel 14 on the air inlet 15 side, specifically, on a support base 40 extending from a grille 15a located on an end portion of the air inlet 15 to an inner side of the air inlet 15.
  • a screw hole 41 through which the stepped screw 42 described above is screwed is formed in the support base 40.
  • the engagement member 30 is installed on the support base 40 as described above, and then, the stepped screw 42 inserted through the washer 43 is screwed through the screw hole 41. In this manner, the engagement member 30 is supported to be slidable in a longitudinal direction of the elongated hole 37.
  • the plate springs 31 on the both ends of the engagement member 30 are each held under a state of being sandwiched between a main rib 15b and an auxiliary rib 15c respectively formed on the two grilles 15d and 15a on the end portion side among the plurality of grilles forming the air inlet 15.
  • the main rib 15b and the auxiliary rib 15c are spring support portions formed integrally with the grilles 15a and 15d by molding, and are configured to sandwich both end surfaces of the plate spring 31 at different positions.
  • each of the plate springs 31 is sandwiched at two points. Therefore, deformation in the advancing direction and the retreating direction and variation, which may occur during the molding of the plate springs 31, can be corrected. Further, the two points being the main rib 15b and the auxiliary rib 15c serve as the supporting points. Thus, reaction forces against the respective supporting points, which are generated by the elastic forces of the plate springs 31, can be dispersed. Further, the elastic forces of the plate springs 31 generated in the advancing direction can be adjusted by distances from the engagement member 30 to the main rib 15b and the auxiliary rib 15c. The elastic forces of the plate springs 31 can be reduced by increasing the distances.
  • Fig. 8 is a sectional view for illustrating a positional relationship between the engagement member and the decorative panel when the suction grille of Fig. 3 is raised up to the vicinity of the decorative panel.
  • Fig. 9 is a sectional view for illustrating the positional relationship between the engagement member and the decorative panel immediately before the suction grille of Fig. 8 is closed.
  • Fig. 10 is a sectional view for illustrating a locking state of the engagement member and the decorative panel when the suction grille of Fig. 9 is closed.
  • Fig. 11 is a sectional view for illustrating the positional relationship between the engagement member and the decorative panel when the engagement member of Fig. 10 is retreated.
  • the protruding piece 13a protruding horizontally toward the opening of the indoor-unit main body 10 is formed on a side wall 13c of the decorative panel 13, which is located at a position opposed to the engagement member 30.
  • the protruding piece 13a has a length equal to a width of the engagement member 30, and an inclined surface 13b in parallel with inclined surfaces 33a of the guide portions 33 of the engagement member 30 is formed at a distal end of the protruding piece 13a.
  • the protruding piece 13a is formed on the decorative panel 13. With this configuration, a protruding portion can be eliminated from the suction panel 14 which is operated by a user, thereby being capable of securing the safety.
  • the engagement member 30 when the suction panel 14 is raised up to the vicinity of the decorative panel 13, the engagement member 30 is located below the protruding piece 13a of the decorative panel 13.
  • the suction panel 14 is further raised up, as illustrated in Fig. 9 , the inclined surfaces 33a of the guide portions 33 of the engagement member 30 are brought into contact with the inclined surface 13b of the protruding piece 13a.
  • the engagement member 30 is raised up under the state in which the inclined surfaces 33a of the guide portions 33 are held in contact with the inclined surface 13b of the protruding piece 13a, the guide portions 33 of the engagement member 30 are guided to the inclined surface 13b of the protruding piece 13a.
  • the engagement member 30 is retreated through the sliding portions 36 in a direction indicated by the solid arrow in a portion between the washer 43 of the stepped screw 42 and the support base 40.
  • the plate springs 31 provided at the both ends of the engagement member 30 are deflected in the retreating direction against the elastic forces with the main rib 15b and the auxiliary rib 15c as the supporting points.
  • the engagement member 30 advances in the direction indicated by the dotted arrow by the elastic forces of the respective plate springs 31, and the engagement portion 32 of the engagement member 30 is locked to the protruding piece 13a of the decorative panel 13.
  • the suction panel 14 closes the opening of the indoor-unit main body 10.
  • the suction panel 14 closing the opening of the indoor-unit main body 10 is opened, as illustrated in Fig. 11 , the operating portion 35 of the engagement member 30 is manually pulled in the direction indicated by the solid arrow. With this operation, the engagement portion 32 of the engagement member 30 is separated from the protruding piece 13a of the decorative panel 13 so that the locking state is released. Through the releasing, the suction panel 14 opens the opening of the indoor-unit main body 10 with the support shaft 20 as a supporting point.
  • the main rib 15b and the auxiliary rib 15c formed on the suction panel 14 by molding serve as the supporting points.
  • a load applied when the function of the plate spring 31 is exhibited can be dispersed. Therefore, the durability of the plate spring 31 formed by molding of a resin material can be enhanced.
  • the main rib 15b and the auxiliary rib 15c formed on the suction panel 14 by molding are arranged in an opposing direction.
  • the plate spring 31 can be mounted under a state in which the variation in shape of the plate spring 31 is corrected, thereby being capable of absorbing backlash of the plate spring 31.
  • the protruding piece 13a is formed on the decorative panel 13. With this configuration, the protruding portion can be eliminated from the suction panel 14 which is operated by a user, thereby being capable of securing the safety.
  • the inclined surfaces 33a are formed on the guide portions 33 of the engagement member 30, and the inclined surface 13b, which is parallel to the inclined surfaces 33a, is formed at the distal end of the protruding piece 13a protruding from the decorative panel 13.
  • a surface of the operating portion 35 of the engagement member 30 is formed as a planar surface.
  • a lower end portion of the operating portion 35 may be protruded toward the engagement portion 32.
  • Fig. 12 is a sectional view for illustrating a modification example of the engagement member of the embodiment.
  • the operating portion 35 of the engagement member 30 includes a finger-hooking protruding portion 35a protruding from the lower end portion of the operating portion 35 toward the engagement portion 32.
  • a finger is easily hooked when the operating portion 35 is moved in the retreating direction, thereby being capable of securing the operability.
  • the engagement members 30 are provided at portions of the suction panel 14 on the air inlet 15 side, specifically, on the outer end portion of the air inlet 15 in the transverse direction.
  • the engagement members 30 may be installed at positions illustrated in Fig. 13.
  • Fig. 13 is a perspective view for illustrating the suction grille of the indoor unit in a modification example of the installation position of the engagement member of the embodiment.
  • the engagement members 30 may be provided at portions of the suction panel 14 on the air inlet 15 side, specifically, both end portions of the air inlet 15 in the longitudinal direction, respectively.
  • the installation positions of the engagement members 30 can be determined in consideration of the size of the decorative panel 13 and the operability.

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)
EP16904842.8A 2016-11-30 2016-11-30 Air conditioner indoor unit Active EP3550218B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/085472 WO2018100654A1 (ja) 2016-11-30 2016-11-30 空気調和機の室内機

Publications (3)

Publication Number Publication Date
EP3550218A1 EP3550218A1 (en) 2019-10-09
EP3550218A4 EP3550218A4 (en) 2019-10-09
EP3550218B1 true EP3550218B1 (en) 2020-09-16

Family

ID=62241313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16904842.8A Active EP3550218B1 (en) 2016-11-30 2016-11-30 Air conditioner indoor unit

Country Status (5)

Country Link
US (1) US20200049371A1 (ja)
EP (1) EP3550218B1 (ja)
JP (1) JP6735847B2 (ja)
CN (1) CN208750980U (ja)
WO (1) WO2018100654A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019038798A1 (ja) 2017-08-21 2019-02-28 三菱電機株式会社 天井埋込型空気調和機
JP6635275B2 (ja) * 2018-03-30 2020-01-22 株式会社富士通ゼネラル 天井埋込型空気調和機
JP2021103041A (ja) * 2019-12-25 2021-07-15 株式会社富士通ゼネラル 天井埋込型空気調和機
WO2021150100A1 (en) * 2020-01-22 2021-07-29 Daikin Research & Development Malaysia Sdn. Bhd. A mounting structure of a grille
JP1709599S (ja) * 2021-03-31 2022-03-11 エアーコンディショナー
FR3128516B1 (fr) * 2021-10-27 2024-01-12 Caladair Int Caisson de ventilation

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
JPS59111609U (ja) * 1983-01-20 1984-07-27 吉田工業株式会社 コンパクト容器
JPS59114808U (ja) * 1983-01-25 1984-08-03 吉田工業株式会社 コンパクト容器
JPH0626711U (ja) * 1992-09-08 1994-04-12 釜屋化学工業株式会社 コンパクト容器
JP3795957B2 (ja) * 1996-04-17 2006-07-12 三洋電機株式会社 空気調和装置
JP4226864B2 (ja) * 2002-08-30 2009-02-18 東芝キヤリア株式会社 スライド式ロック装置および空気調和装置
JP2008064342A (ja) * 2006-09-05 2008-03-21 Fujitsu General Ltd 空気調和機
JP4818058B2 (ja) * 2006-10-12 2011-11-16 三洋電機株式会社 空気調和装置
JP5216427B2 (ja) * 2008-06-13 2013-06-19 三洋電機株式会社 天井埋込型空気調和装置
KR101600701B1 (ko) * 2014-08-26 2016-03-07 주식회사 위닉스 에어 워셔

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
CN208750980U (zh) 2019-04-16
WO2018100654A1 (ja) 2018-06-07
JP6735847B2 (ja) 2020-08-05
EP3550218A1 (en) 2019-10-09
JPWO2018100654A1 (ja) 2019-06-24
US20200049371A1 (en) 2020-02-13
EP3550218A4 (en) 2019-10-09

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