EP2916081B1 - Outdoor unit - Google Patents

Outdoor unit Download PDF

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Publication number
EP2916081B1
EP2916081B1 EP15154783.3A EP15154783A EP2916081B1 EP 2916081 B1 EP2916081 B1 EP 2916081B1 EP 15154783 A EP15154783 A EP 15154783A EP 2916081 B1 EP2916081 B1 EP 2916081B1
Authority
EP
European Patent Office
Prior art keywords
air outlet
outdoor unit
main body
piece portion
outlet grille
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
EP15154783.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2916081A1 (en
Inventor
Yoshinori Tanikawa
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 EP2916081A1 publication Critical patent/EP2916081A1/en
Application granted granted Critical
Publication of EP2916081B1 publication Critical patent/EP2916081B1/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
    • 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
    • F24F13/224—Means for preventing condensation or evacuating condensate for evacuating condensate in a window-type room air conditioner
    • 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
    • F24F1/46—Component arrangements in separate outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
    • 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
    • F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew

Definitions

  • the present invention relates to an outdoor unit of an air-conditioning apparatus, and more particularly, to an outdoor unit of an air-conditioning apparatus, which is capable of preventing water droplets from being frozen between a fan and a bellmouth.
  • Patent Literature 1 relates to an outdoor unit for an air conditioner casing a blow out grille being fixed to a front face panel.
  • the grille has a horizontal frame-like upper part.
  • the protruding part formed around the air outlet opening of the front panel and the waterproofing part (slanted part) formed on the air outlet grille are brought into intimate contact with each other so as to prevent the water droplets from intruding into the casing. Consequently, when the front panel and the air outlet grille are warped or deformed during a constituting process, a gap is formed between the protruding part and the waterproofing part, and hence there is a problem in that intrusion of the water droplets may not be prevented from occurring. Further, also when the front panel and the air outlet grille are deformed due to aged deterioration after installation of the outdoor unit, waterproofing performance cannot similarly be secured.
  • the present invention has been made in order to solve the above-mentioned problem, and an object thereof is to prevent, with a simple configuration of a casing of an outdoor unit, reduction in blowing performance, occurrence of noise, and the like, which may be caused by frozen water droplets intruding from an outside of the casing into the casing, particularly into a periphery of a bellmouth and the like provided in a vicinity of an air outlet grille.
  • an outdoor unit including: a main body including a front panel; a top panel covering a top surface of the main body; and an air outlet grille mounted to the front panel.
  • the top panel includes a bending piece portion formed along a periphery of the top panel.
  • the air outlet grille includes a fixing piece portion formed along an edge of the air outlet grille. The air outlet grille is mounted so that the fixing piece portion of the air outlet grille is sandwiched between the front panel and the bending piece portion.
  • the air outlet grille is mounted so that the fixing piece portion of the air outlet grille is sandwiched between the front panel and the bending piece portion of the top panel. Consequently, it is possible to prevent, with a simple configuration of the casing of the outdoor unit, reduction in blowing performance, occurrence of noise, and the like, which may be caused by frozen water droplets intruding from the outside of the casing into the casing, particularly into the periphery of the bellmouth and the like provided in the vicinity of the air outlet grille.
  • Fig. 1 is an exploded perspective view illustrating the outdoor unit according to Embodiment 1.
  • Fig. 2 is an external perspective view illustrating the outdoor unit according to Embodiment 1.
  • Fig. 3 is a cross-sectional view illustrating a periphery of a front panel of the outdoor unit according to Embodiment 1.
  • a casing of the outdoor unit of an air-conditioning apparatus includes a front panel 2 constituting a front surface side of a main body 1 having a box-like shape, a top panel 3 constituting a top surface of the main body 1, and an air outlet grille 6.
  • An air outlet opening 2a is formed into a circular shape in the front panel 2, and a bellmouth 4 having a substantially cylindrical shape is formed around the air outlet opening 2a integrally with the front panel 2.
  • a heat exchanger (not shown) is arranged on a back surface side of the main body 1, which is opposed to the front panel 2.
  • a vertical stepped portion 1a and a horizontal stepped portion 1b are formed along a peripheral edge of the main body 1 on the top surface side.
  • the vertical stepped portion 1a has a vertical surface on an inner side of the casing with respect to a side wall surface of the main body 1, and the horizontal stepped portion 1b horizontally connects the side wall surface and the vertical stepped portion 1a of the main body 1.
  • a bending piece portion 3a formed along an outer periphery of the top panel 3 is fitted onto the vertical stepped portion 1a, and closes the top surface of the main body 1, to thereby form the casing of the outdoor unit. Then, an outer surface of the bending piece portion 3a of the top panel 3 is flush with the side wall surface of the main body 1.
  • the air outlet grille 6 has, for example, a rectangular shape.
  • a plurality of flat-plate-like louvers 6c define openings that allow the outside air, which is to be blown by the fan 5, to flow therethrough for heat exchange.
  • the fixing piece portion 6a has a plate-like shape, and is formed so as to extend upward from a back surface side of the air outlet grille 6. Further, when viewed from a front surface of the air outlet grille 6, the fixing piece portion 6a is formed along a widthwise direction of the air outlet grille 6.
  • the fixing piece portion 6a is fixed along the vertical stepped portion 1a of the front panel 2 of the main body 1 so that an air outlet plane of the air outlet grille 6 is substantially vertical when the air outlet grille 6 is mounted to the main body 1.
  • the inclined tongue portion 6b is formed so as to extend with a downward inclination from a lower end of the fixing piece portion 6a toward the front surface side of the main body 1.
  • a front end portion of the inclined tongue portion 6b is substantially flush with front end portions of the plurality of louvers 6c.
  • a steel sheet may be adopted for the main body 1 and the top panel 3, and a resin may be adopted for the air outlet grille 6 and the fan 5.
  • materials for the components are not limited thereto.
  • the air outlet grille 6 is temporarily mounted so as to cover the air outlet opening 2a of the front panel 2 of the main body 1. Then, as illustrated in Fig. 3 , the air outlet grille 6 is temporarily mounted so that the back surface side of the fixing piece portion 6a formed along the upper edge of the air outlet grille 6 abuts on the front surface side of the vertical stepped portion 1a of the front panel 2 of the main body 1, and that a lower surface of the fixing piece portion 6a abuts on the horizontal stepped portion 1b of the main body 1.
  • the top panel 3 is mounted from an upper surface side of the main body 1, and the bending piece portion 3a of the top panel 3 is fitted onto the vertical stepped portion 1a of the main body 1.
  • the fixing piece portion 6a of the air outlet grille 6 is sandwiched between the vertical stepped portion 1a of the front panel 2 of the main body 1 and the bending piece portion 3a of the top panel 3.
  • the inclined tongue portion 6b is shaped so as to extend with a downward inclination from the lower end of the fixing piece portion 6a toward the front surface side of the main body 1.
  • an upper surface of the inclined tongue portion 6b of the air outlet grille 6 is positioned below the bending piece portion 3a of the top panel 3 under a state in which the fixing piece portion 6a is mounted to the main body 1, and the upper surface of the inclined tongue portion 6b has a surface inclined downward toward the front surface side of the main body 1.
  • the heat exchanger (not shown) is disposed on the back surface side of the main body 1.
  • the heat exchanger functions as a condenser when an indoor unit performs cooling operation, and functions as an evaporator when the indoor unit performs heating operation.
  • the outside air which has passed through the heat exchanger, is blown by the blades of the fan 5 to the front surface side of the main body 1 of the outdoor unit, and then is blown out from the air outlet opening 2a of the front panel 2 through an inner wall surface side of the cylindrical bellmouth 4.
  • the outside air blown out from the air outlet opening 2a passes between the louvers 6c of the air outlet grille 6, and is discharged from the main body 1 of the outdoor unit.
  • the water droplets which are generated from rain, snow, and the like coming down onto the top panel 3 of the outdoor unit, fall down onto the inclined tongue portion 6b of the air outlet grille 6 along the bending piece portion 3a from the top panel 3 illustrated in Fig. 3 .
  • the upper surface of the inclined tongue portion 6b includes the surface inclined downward toward the front surface side of the main body 1, and hence the water droplets flow over the inclined tongue portion 6b toward the front surface side of the main body 1, and then fall down from the front end portion of the inclined tongue portion 6b.
  • the water droplets which have thus fallen down, fall downward along surfaces of the louvers 6c.
  • the fan 5 is driven so as to rotate, the water droplets fall down while being carried off by a blown-out airflow further toward the front surface side of the main body 1.
  • the fixing piece portion 6a of the air outlet grille 6 is arranged so as to be sandwiched between the vertical stepped portion 1a of the front panel 2 of the main body 1 and the bending piece portion 3a of the top panel 3.
  • the water droplets which are generated from rain, snow, and the like coming down onto the inclined tongue portion 6b, are dammed up by the fixing piece portion 6a without intruding into the main body 1.
  • the heat exchanger of the outdoor unit functions as the evaporator
  • the water droplets may be frozen.
  • the casing of the outdoor unit according to Embodiment 1 does not allow the intrusion of the water droplets into a periphery of the bellmouth 4, thereby being capable of securing the blowing performance of the fan 5 and preventing the breakage of the fan 5.
  • Fig. 4 is an external perspective view illustrating the outdoor unit according to Embodiment 2.
  • Fig. 5 is a cross-sectional view illustrating a periphery of a front panel of the outdoor unit according to Embodiment 2.
  • the outdoor unit according to Embodiment 2 is similar to the outdoor unit according to Embodiment 1 in the basic configuration in which the fixing piece portion 6a of the air outlet grille 6 is sandwiched between the vertical stepped portion 1a of the front panel 2 of the main body 1 and the bending piece portion 3a of the top panel 3.
  • the air outlet grille 6 has such a configuration that the inclined tongue portion 6b is formed so as to extend from the lower end of the fixing piece portion 6a to the front surface side of the main body 1, whereas a configuration of an upper edge of the air outlet grille 6 is different in Embodiment 2. Therefore, the differences from the air outlet grille 6 according to Embodiment 1 are described.
  • the upper edge of the air outlet grille 6 of the outdoor unit according to Embodiment 2 includes a lateral inclined tongue portion 6d having such a shape that a center is highest and downward inclined surfaces extend from the center laterally.
  • the lateral inclined tongue portion 6d is formed so as to extend from the lower end of the fixing piece portion 6a to the front surface side of the main body 1.
  • the lateral inclined tongue portion 6d is shaped so as to have a horizontal upper surface. Note that, description is made of an example in which the upper surface of the lateral inclined tongue portion 6d is horizontal in cross-sectional view of the front panel 2 as described above. However, similarly to the inclined tongue portion 6b according to Embodiment 1, the lateral inclined tongue portion 6d may further have a downward inclination extending toward the front surface side of the main body 1.
  • a process of assembling components provided around the air outlet grille 6 of the outdoor unit according to Embodiment 2 is carried out similarly to that of Embodiment 1.
  • the upper surface of the lateral inclined tongue portion 6d of the air outlet grille 6 is positioned below the bending piece portion 3a of the top panel 3, and includes downward inclined surfaces extending laterally when viewed from the front surface side of the main body 1.
  • the water droplets which are generated from rain, snow, and the like coming down onto the top panel 3 of the outdoor unit, fall down onto the lateral inclined tongue portion 6d of the air outlet grille 6 along the bending piece portion 3a from the top panel 3 illustrated in Fig. 5 .
  • the upper surface of the lateral inclined tongue portion 6d includes the downward inclined surfaces extending laterally in front view of the main body 1, and hence the water droplets flow over the lateral inclined tongue portion 6d separately in rightward and leftward directions, and then fall down from both right and left end portions of the lateral inclined tongue portion 6d.
  • the water droplets that have thus fallen down fall downward along both end portions of the louvers 6c.
  • the upper surface of the lateral inclined tongue portion 6d includes the downward inclined surfaces extending laterally in front view of the main body 1.
  • the upper surface of the lateral inclined tongue portion 6d may include an inclined surface having a downward inclination extending in one of the rightward and leftward directions.
  • Embodiment 2 in the casing of the outdoor unit according to Embodiment 2, there is adopted such a configuration that the fixing piece portion 6a of the air outlet grille 6 is arranged so as to be sandwiched between the vertical stepped portion 1a of the front panel 2 of the main body 1 and the bending piece portion 3a of the top panel 3, and that the lateral inclined tongue portion 6d is formed so as to extend from the lower end of the fixing piece portion 6a toward the front surface side of the main body 1.
  • the water droplets which are generated from rain, snow, and the like coming down onto the lateral inclined tongue portion 6d, are dammed up by the fixing piece portion 6a without intruding into the main body 1.
  • the heat exchanger of the outdoor unit functions as the evaporator
  • the water droplets may be frozen.
  • the casing of the outdoor unit according to Embodiment 2 does not allow intrusion of the water droplets into a periphery of the bellmouth 4, thereby being capable of securing the blowing performance of the fan 5 and preventing the breakage of the fan 5.
  • Fig. 6 is a cross-sectional view illustrating a periphery of a front panel of the outdoor unit according to Embodiment 3.
  • the outdoor unit according to Embodiment 3 is similar to the outdoor units according to Embodiments 1 and 2 in the basic configuration in which the fixing piece portion 6a of the air outlet grille 6 is sandwiched between the vertical stepped portion 1a of the front panel 2 of the main body 1 and the bending piece portion 3a of the top panel 3. Further, an air outlet grille according to Embodiment 3 has a common feature in configuration of the upper edge of the air outlet grille 6 having such a shape that a center is highest and downward inclined surfaces extend from the center laterally like the lateral inclined tongue portion 6d according to Embodiment 2. Therefore, the differences from the air outlet grilles 6 according to Embodiments 1 and 2 are described.
  • the upper edge of the air outlet grille 6 of the outdoor unit according to Embodiment 3 includes a lateral inclined tongue portion 6d having such a shape that a center is highest and downward inclined surfaces extend from the center laterally.
  • the lateral inclined tongue portion 6d is formed so as to extend from the lower end of the fixing piece portion 6a to the front surface side of the main body 1.
  • the lateral inclined tongue portion 6d integrally includes a protruding piece portion 6e arranged on the front surface side of the main body 1 in cross-sectional view of the front panel 2 so as to extend from the lateral inclined tongue portion 6d upright substantially in a vertical direction.
  • the protruding piece portion 6e is formed along a widthwise direction of the air outlet grille 6 when viewed from the front surface side of the air outlet grille 6.
  • the lateral inclined tongue portion 6d is shaped so as to have a horizontal upper surface. Note that, description is made of an example in which the upper surface of the lateral inclined tongue portion 6d is horizontal in cross-sectional view of the front panel 2 as described above. However, similarly to the inclined tongue portion 6b according to Embodiment 1, the lateral inclined tongue portion 6d may further have a downward inclination extending toward the front surface side of the main body 1.
  • a process of assembling components provided around the air outlet grille 6 of the outdoor unit according to Embodiment 3 is carried out similarly to that of Embodiment 1.
  • the upper surface of the lateral inclined tongue portion 6d of the air outlet grille 6 is positioned below the bending piece portion 3a of the top panel 3, and includes downward inclined surfaces extending laterally when viewed from the front surface side of the main body 1.
  • the protruding piece portion 6e is formed on the upper surface of the lateral inclined tongue portion 6d on the front surface side of the main body 1.
  • the water droplets which are generated from rain, snow, and the like coming down onto the top panel 3 of the outdoor unit, fall down onto the lateral inclined tongue portion 6d of the air outlet grille 6 along the bending piece portion 3a from the top panel 3 illustrated in Fig. 6 .
  • the upper surface of the lateral inclined tongue portion 6d includes the downward inclined surfaces extending laterally in front view of the main body 1, and the protruding piece portion 6e is formed at an end portion of the lateral inclined tongue portion 6d on the front surface side. Consequently, the water droplets flow over the lateral inclined tongue portion 6d separately in the rightward and leftward directions, and then fall down from both the right and left end portions of the lateral inclined tongue portion 6d. The water droplets that have thus fallen down fall downward along both the end portions of the louvers 6c.
  • Embodiments 1 and 2 in the casing of the outdoor unit according to Embodiment 3, there is adopted such a configuration that the fixing piece portion 6a of the air outlet grille 6 is arranged so as to be sandwiched between the vertical stepped portion 1a of the front panel 2 of the main body 1 and the bending piece portion 3a of the top panel 3, and that the lateral inclined tongue portion 6d is formed so as to extend from the lower end of the fixing piece portion 6a toward the front surface side of the main body 1.
  • the water droplets, which are generated from rain, snow, and the like coming down onto the lateral inclined tongue portion 6d are dammed up by the fixing piece portion 6a without intruding into the main body 1.
  • the heat exchanger of the outdoor unit functions as the evaporator
  • the water droplets may be frozen.
  • the water droplets are frozen on the bellmouth 4 and the like provided around the fan 5, reduction in blowing performance of the fan 5, occurrence of noise, breakage of the fan 5, and the like may be caused.
  • the casing of the outdoor unit according to Embodiment 3 does not allow intrusion of the water droplets into a periphery of the bellmouth 4, thereby being capable of securing the blowing performance of the fan 5 and preventing the breakage of the fan 5.
  • the fixing piece portion 6a is arranged between the bending piece portion 3a and the vertical stepped portion 1a of the front panel 2, the water droplets do not fall down to the bellmouth 4 side. Consequently, the same effects as the above-mentioned effects can be obtained.
  • the protruding piece portion 6e is formed on the upper surface of the lateral inclined tongue portion 6d on the front surface side of the main body 1, and hence the water droplets do not fall down to the front surface side of the main body 1. Therefore, it is possible to prevent the water droplets from being scattered to the front surface side of the main body 1 by the airflow that is blown out when the fan 5 is driven so as to rotate.

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  • 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)
  • Other Air-Conditioning Systems (AREA)
EP15154783.3A 2014-03-03 2015-02-12 Outdoor unit Active EP2916081B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014040650A JP6223232B2 (ja) 2014-03-03 2014-03-03 室外機

Publications (2)

Publication Number Publication Date
EP2916081A1 EP2916081A1 (en) 2015-09-09
EP2916081B1 true EP2916081B1 (en) 2018-10-03

Family

ID=52472200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15154783.3A Active EP2916081B1 (en) 2014-03-03 2015-02-12 Outdoor unit

Country Status (4)

Country Link
US (1) US20150247649A1 (enrdf_load_stackoverflow)
EP (1) EP2916081B1 (enrdf_load_stackoverflow)
JP (1) JP6223232B2 (enrdf_load_stackoverflow)
CN (2) CN104896611B (enrdf_load_stackoverflow)

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
JP5522150B2 (ja) * 2011-11-14 2014-06-18 ダイキン工業株式会社 冷凍装置の室外機
JP6223232B2 (ja) * 2014-03-03 2017-11-01 三菱電機株式会社 室外機
US11054156B2 (en) * 2016-01-25 2021-07-06 Mitsubishi Electric Corporation Outdoor unit and air conditioner including the same
JP2020200967A (ja) * 2019-06-06 2020-12-17 シャープ株式会社 空気調和機の室外機
JP7370477B2 (ja) * 2020-10-05 2023-10-27 三菱電機株式会社 空気調和機の室外機
JP2023132054A (ja) * 2022-03-10 2023-09-22 株式会社マキタ 作業機
JP7728208B2 (ja) * 2022-03-10 2025-08-22 株式会社マキタ 作業機
CN115654587A (zh) * 2022-10-09 2023-01-31 青岛海信日立空调系统有限公司 一种空调室外机以及空调系统
EP4428458A1 (en) * 2023-03-10 2024-09-11 BDR Thermea Group B.V. Heat pump grille

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Also Published As

Publication number Publication date
US20150247649A1 (en) 2015-09-03
EP2916081A1 (en) 2015-09-09
JP2015166647A (ja) 2015-09-24
CN104896611A (zh) 2015-09-09
JP6223232B2 (ja) 2017-11-01
CN204534881U (zh) 2015-08-05
CN104896611B (zh) 2018-07-20

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