EP1548372B1 - Ceiling embedded-type air conditioning apparatus - Google Patents

Ceiling embedded-type air conditioning apparatus Download PDF

Info

Publication number
EP1548372B1
EP1548372B1 EP03791363.9A EP03791363A EP1548372B1 EP 1548372 B1 EP1548372 B1 EP 1548372B1 EP 03791363 A EP03791363 A EP 03791363A EP 1548372 B1 EP1548372 B1 EP 1548372B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
air conditioner
type air
ceiling type
conditioner according
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.)
Expired - Fee Related
Application number
EP03791363.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1548372A4 (en
EP1548372A1 (en
Inventor
Masazumi Makino
Morinobu Iijima
Akira Nakamura
Takeshi Watanabe
Kiyoshi Tamura
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.)
Advanced Air-Conditioning Research and Development Center Co Ltd
Toshiba Carrier Corp
Sanyo Electric Air Conditioning Co Ltd
Original Assignee
Advanced Air-Conditioning Research and Development Center Co Ltd
Toshiba Carrier Corp
Sanyo Electric Air Conditioning Co 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
Priority claimed from JP2002254253A external-priority patent/JP4210493B2/ja
Priority claimed from JP2002254252A external-priority patent/JP4300005B2/ja
Application filed by Advanced Air-Conditioning Research and Development Center Co Ltd, Toshiba Carrier Corp, Sanyo Electric Air Conditioning Co Ltd filed Critical Advanced Air-Conditioning Research and Development Center Co Ltd
Publication of EP1548372A1 publication Critical patent/EP1548372A1/en
Publication of EP1548372A4 publication Critical patent/EP1548372A4/en
Application granted granted Critical
Publication of EP1548372B1 publication Critical patent/EP1548372B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0067—Indoor units, e.g. fan coil units characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
    • 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
    • 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
    • F24F1/0071—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
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F2013/0616—Outlets that have intake openings
    • 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
    • F24F2221/14—Details or features not otherwise provided for mounted on the ceiling

Definitions

  • the present invention relates to an in-ceiling type air conditioner having a heat exchanger disposed so as to surround an air blower, and particularly to an in-ceiling type air conditioner in which a space for accommodating various kinds of equipment such as a pipe group, a train pump, an electrical part box, etc. therein can be effectively used, and further these kinds of equipment can be easily secured.
  • This type of air conditioner is designed so that various kinds of equipment such as a pipe group of the heat exchanger, an electrical part box, a drain pump, etc. are accommodated in a narrow space in the housing, and thus some determinate restriction is imposed on a bending shape of the heat exchanger.
  • it has been required to achieve the largest power possible in the heat exchanger by increasing the heat transfer area of the heat exchanger as much as possible.
  • a drain pan formed by integrally molding a resin frame for a drain pan sheet and foamed styrol is disposed below the heat exchanger of this type of in-ceiling air conditioner, and an air suction hole is formed substantially at the center of the drain pan so as to face an air suction port of an air blower.
  • this type of air conditioner it is general that insert fittings are embedded in the foamed styrol face at the opposite side to the resin frame and a resin bell mouth of the air blower, the electrical part box, etc. are fixed to the insert fittings by screws.
  • the construction as described above has a problem that the insert fittings must be embedded in the foamed styrol face and thus workability is low. Furthermore, the suction hole is formed in the foamed styrol, and such a construction causes the foamed styrol to expose to the surrounding of the suction hole. Therefore, there is also a problem that a corner portion of the foamed styrol is liable to be chipped while the air conditioner is carried.
  • a first object of the present invention is to provide a heat exchanger which can be efficiently accommodated in a narrow space of a housing to thereby increase a heat-transfer area, and an in-ceiling type air conditioner using the heat exchanger.
  • a second object of the present invention is to solve the above problem, and provide a train pan to which equipment such as a bell mouth of an air blower, an electrical part box, etc. can be simply secured, and an in-ceiling type air conditioner using the drain pan.
  • An air conditioner according to the preamble of claim 1 is disclosed in EP-A-0 985 889.
  • an in-ceiling type air conditioner according to claim 1.
  • a pipe group of the heat exchanger and a drain pump are respectively disposed in the two equipment accommodating spaces.
  • an auxiliary heater is disposed between the heat exchanger and the air blower is further disposed, and electrical parts of the auxiliary heater are mounted on the pipe plate for joining the bending start and end positions of the polygonal heat exchanger.
  • the respective corner portions of the pentagonal heat exchanger are bent by using a common bending roller jig.
  • the part of the heat exchanger protruding to the housing side is overlapped with an air blow-out port disposed so as to face an outer space of the heat exchanger.
  • a drain pan formed by integrally molding a resin frame for a drain pan sheet and foamed styrol is disposed below the heat exchanger, a suction hole facing a suction port of the air blower is formed substantially at the center of the drain pan, a boss which penetrates through the foamed styrol is formed in the resin frame so as to face the surface of the resin frame at the opposite side to the foamed styrol, and a bell mouth of the air blower is fixable to the boss.
  • an electrical part box is fixable to the boss.
  • a reinforcing rib is formed so as to surround the boss.
  • a suction hole reinforcing rib is formed in the resin frame so as to surround a suction hole formed in the foamed styrol.
  • the suction hole reinforcing rib extends around a lead wire guide recess hole formed around the suction hole.
  • an in-ceiling type air conditioner has a box-shaped main body formed of sheet metal and hung from the ceiling by hanging bolts 2.
  • the air conditioner main body 1 is opened downwardly, and when it is embedded in the ceiling, this opening side faces a room to be air-conditioned.
  • a motor 5 is fixed in the air conditioner main body 1, and a vane wheel 7 is secured to the shaft of the motor 5, thereby constituting an air blower 9.
  • a polygonally-bent heat exchanger 11 is disposed so as to surround the air blower 9, and a drain pan 13 is disposed at the lower side of the heat exchanger 11.
  • a bell mouth 14 is secured to the drain pan 13.
  • a decorative panel 21 is secured to the lower surface of the air conditioner main body 1, an air suction port 22 and an air blow-out port 23 are formed in the decorative panel, and a filter 25 is mounted at the inside of the suction port 22.
  • Fig. 2 is a plan view showing the air conditioner main body 1 when the drain pan 13 is removed.
  • the heat exchanger 11 is designed to be bent in a substantially pentagonal (polygonal) shape and disposed in the air conditioner main body 1.
  • Three sides 11A, 11B and 11C of the heat exchanger 11 extend substantially in parallel to three sides 1A, 1B, 1C of the air conditioner main body (housing), and the remaining part 11D of the heat exchanger 11 is disposed so as to face one side 1D of the housing 1 and designed so as to protrude in a triangular shape toward the one side 1D of the housing 1.
  • the heat exchanger 11 is constructed by doubly stacking fin-and-tube type heat exchangers in the air flow directions of solid-line arrows.
  • Each of the corner portions A, B, C, D of the heat exchanger is bent by the same roller (not shown9 having a radius R which is set in a bending roller jig to thereby complete the pentagonal (polygonal) heat exchanger.
  • a bending start position (one end of the heat exchanger) 11K and a bending end position (the other end of the heat exchanger) 11L are joined to each other through a width-narrow tube plate.
  • a space in which a pipe group 27 of the heat exchanger and a drain pump 28 are disposed is required to be secured in the outer space of the heat exchanger 11, and also a space in which a bell mouth 14 and an electrical part box 45 are disposed is required to be secured in the inner space of the heat exchanger 11.
  • some determinate restriction is imposed on the bending shape of the heat exchanger 11, and also it has been required to achieve large heat-exchange power by increasing the heat-transfer area at maximum.
  • the part 11D of the heat exchanger 11 is designed so as to protrude to the housing 1 side (that is, the part 11D is protruded outwardly). Therefore, as compared with the construction that this part is not protruded (that is, all the sides are flat), the heat-transfer area can be increased.
  • the pipe group 27 and the drain pump 28 are dispersively disposed in the relatively large spaces S1, S2 at both the sides of the protruded portion, so that these equipment can be efficiently accommodated.
  • the bending start position 11K and the bending end position 11L of the heat exchanger 11 are approached to each other to reduce the interval therebetween, and joined to each other by the width-narrow pipe plate 11M. Therefore, as compared with the construction that the ends of the heat exchanger 11 are joined to each other by a width-broad pipe plate, the heat-transfer area of this embodiment can be increased more greatly.
  • Fig. 4 is a plan view showing a state where the drain pan 13 is mounted in the air conditioner main body 1 shown in Fig. 1 .
  • the air conditioner main body 1 (indicated by a one-dotted chain line in Fig. 4 ) has substantially rectangular inner blow-out ports 41 at four sides, and the inner blow-out ports 41 intercommunicate with the blow-out ports 23 of the decorative panel 21 shown in Fig. 1 .
  • a projecting portion 13A projecting into the inner blow-out port 41 is formed integrally with the drain pan 13 at the position corresponding to the part 11D of the heat exchanger 11.
  • the part 11D of the heat exchanger 11 protruded to the housing 1 side is slightly overlapped with the blow-out port 23 corresponding to the outside space of the heat exchanger 11, and thus the projecting portion 13A of the drain pan 13 which corresponds to the part 11D faces the blow-out port 23.
  • the projecting portion 13A can achieve such a large effect that the heat-transfer area can be increased by protruding the part 11D so as to be overlapped with the blow-out port 23.
  • auxiliary heaters 43 as indicated by broken lines are disposed as shown in Fig. 2 between the heat exchanger 11 and the air blower 9.
  • the electrical parts of the auxiliary heaters 43 are mounted on the pipe plate 11M for joining the bending start position 11K and the bending end position 11L of the heat exchanger 11. Accordingly, an extra supporting member for supporting the electrical parts of the auxiliary heaters 43 is not needed, and thus the manufacturing cost can be reduced.
  • the part 11D of the heat exchanger 11 is protruded in a triangular shape toward the housing 1 side, and thus the shape of the electrical part box 45 is set to be substantially elbowed in conformity with the shape of the part 11D.
  • This type of electrical part box 45 is generally linearly designed. This construction makes the electrical part box 45 protrude greatly into the bell mouth 14, and thus reduces the air suction area of the air blower 9.
  • the electrical part box 45 is designed to be substantially elbowed in conformity with the shape of the part 11D of the heat exchanger 11, so that the electrical part box 45 does not protrude into the bell mouth 14, and thus a large air suction area can be secured for the air blower 9.
  • Fig. 5 is a cross-sectional view of the drain pan 13 of Fig. 4 which is taken along V-V.
  • the drain pan 13 is constructed by integrally molding a resin frame 51 of a drain pan sheet which constitutes the substantially overall upper surface area of the drain pan 13 and is unevenly shaped in a predetermined form to have a thickness of about 2mm, and foamed styrol 53 mainly serving as a heat-insulating member constituting the overall shape of the drain pan 13.
  • An air suction hole 55 which the air suction port of the air blower 9 faces is formed substantially at the center of the drain pan 13, and the bell mouth 14 of the air blower 9 is fitted in the suction hole 55.
  • the bell mouth 14 is fixed to the drain pan 13 by using plural screws 56 as shown in Fig. 4 .
  • the electrical part box 45 is fixed to the drain pan 13 by using plural screws 58.
  • Fig. 6A is a plan view of the resin frame 51 for the drain pan sheet
  • Fig. 6B is a cross-sectional view of Fig. 6A which is taken along B-B.
  • Screw reception bosses 61 are integrally formed with the resin frame 51 of about 2mm in thickness so that the bosses penetrate through the foamed styrol 53 and the heads thereof face the surface of the resin frame 51 at the opposite side to the foamed styrol 53 as shown in Figs. 5 , 6A and 6B , the number of the screw reception bosses 61 being set to be equal to the number of screws 56 and 58.
  • the screws 56 for fixing the bell mouth 14 and the screws 58 for fixing the electrical part box 45 are screw-fixed to the screw reception bosses 61 integrally formed with the resin frame 51 as shown in Fig. 6B , for example.
  • reinforcing ribs 63 are formed around the bosses 61 to reinforce the bosses 61 and the resin frame 51.
  • the resin frame 51 is provided with a suction hole reinforcing rib 64 so as to surround the suction hole 55 formed in the foamed styrol 53, thereby reinforcing the suction hole 55 of the foamed styrol.
  • a recess hole reinforcing rib 67 is formed so as to extend around a recess hole 65, and the recess hole reinforcing rib 67 is integrally formed with the resin frame 51.
  • the bosses 61, the suction hole reinforcing rib 64, the recess hole reinforcing rib 67, etc. are integrally formed with the resin frame 51, thereby enhancing the mechanical strength of the drain pan 13.
  • the present invention is not limited to the above embodiment.
  • the heat exchanger can be efficiently accommodated in the narrow space in the housing, and also the heat transfer area can be increased. Furthermore, the space formed between the heat exchanger and the housing and the space formed in the heat exchanger are used to efficiently accommodate various kinds of equipment such as the pipe group, the drain pump, the electrical part box, etc. in compact spaces. Still furthermore, the air blower, the bell mouth, the electrical part box, etc. can be simply secured to the drain pan.
EP03791363.9A 2002-08-30 2003-08-28 Ceiling embedded-type air conditioning apparatus Expired - Fee Related EP1548372B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2002254253 2002-08-30
JP2002254253A JP4210493B2 (ja) 2002-08-30 2002-08-30 天井埋込型空気調和装置
JP2002254252 2002-08-30
JP2002254252A JP4300005B2 (ja) 2002-08-30 2002-08-30 天井埋込型空気調和装置及び熱交換器
PCT/JP2003/010913 WO2004020914A1 (ja) 2002-08-30 2003-08-28 天井埋込型空気調和装置

Publications (3)

Publication Number Publication Date
EP1548372A1 EP1548372A1 (en) 2005-06-29
EP1548372A4 EP1548372A4 (en) 2008-05-14
EP1548372B1 true EP1548372B1 (en) 2013-04-10

Family

ID=31980539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03791363.9A Expired - Fee Related EP1548372B1 (en) 2002-08-30 2003-08-28 Ceiling embedded-type air conditioning apparatus

Country Status (4)

Country Link
EP (1) EP1548372B1 (es)
KR (1) KR100710089B1 (es)
ES (1) ES2409035T3 (es)
WO (1) WO2004020914A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170115027A1 (en) * 2015-10-23 2017-04-27 Samsung Electronics Co., Ltd. Air conditioner

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070034214A (ko) * 2005-09-23 2007-03-28 삼성전자주식회사 열교환기 지지구 및 이를 갖는 공기조화기
KR101195884B1 (ko) * 2007-07-18 2012-10-30 삼성전자주식회사 천장형 공기조화기
JP6458984B2 (ja) * 2014-10-10 2019-01-30 株式会社富士通ゼネラル 天井埋込型空気調和機
KR102520956B1 (ko) * 2018-03-26 2023-04-13 엘지전자 주식회사 공기 조화기의 실내기
KR102551118B1 (ko) * 2018-03-26 2023-07-05 엘지전자 주식회사 공기 조화기의 실내기
WO2021181695A1 (ja) * 2020-03-13 2021-09-16 三菱電機株式会社 室内機および空気調和装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3606968B2 (ja) * 1995-11-08 2005-01-05 三菱電機株式会社 空気調和機
JP2000046360A (ja) * 1998-07-29 2000-02-18 Hitachi Ltd 天井埋込形の室内機
JP2000161694A (ja) * 1998-11-20 2000-06-16 Toshiba Corp 空気調和機
JP2001235177A (ja) * 2000-02-21 2001-08-31 Sanyo Electric Co Ltd 天井埋込型空気調和装置
JP3651417B2 (ja) * 2001-07-18 2005-05-25 ダイキン工業株式会社 空気調和機
JP3669315B2 (ja) * 2001-09-21 2005-07-06 ダイキン工業株式会社 空気調和機

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170115027A1 (en) * 2015-10-23 2017-04-27 Samsung Electronics Co., Ltd. Air conditioner
EP3892932A1 (en) * 2015-10-23 2021-10-13 Samsung Electronics Co., Ltd. Air conditioner

Also Published As

Publication number Publication date
KR20050083661A (ko) 2005-08-26
KR100710089B1 (ko) 2007-04-25
EP1548372A4 (en) 2008-05-14
ES2409035T3 (es) 2013-06-24
EP1548372A1 (en) 2005-06-29
WO2004020914A1 (ja) 2004-03-11

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