EP3023708B1 - Indoor unit and refrigeration cycle device - Google Patents

Indoor unit and refrigeration cycle device Download PDF

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Publication number
EP3023708B1
EP3023708B1 EP14826379.1A EP14826379A EP3023708B1 EP 3023708 B1 EP3023708 B1 EP 3023708B1 EP 14826379 A EP14826379 A EP 14826379A EP 3023708 B1 EP3023708 B1 EP 3023708B1
Authority
EP
European Patent Office
Prior art keywords
temporary hanging
decorative panel
indoor unit
case
attached
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
EP14826379.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3023708A4 (en
EP3023708A1 (en
Inventor
Tatsuo Furuta
Masaaki Maruyama
Takaaki Takishita
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 EP3023708A1 publication Critical patent/EP3023708A1/en
Publication of EP3023708A4 publication Critical patent/EP3023708A4/en
Application granted granted Critical
Publication of EP3023708B1 publication Critical patent/EP3023708B1/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
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/065—Details
    • 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
    • F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/065—Details
    • F25D23/067—Supporting elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle

Definitions

  • the present invention relates to, for example, an indoor unit of a refrigeration cycle apparatus used in an air-conditioning apparatus. More specifically, the present invention relates to a temporary hanging of a decorative panel disposed at, for example, an air inlet of the indoor unit.
  • a four direction cassette type indoor unit has such a structure that a decorative panel covering the lower surface (the surface facing the inside of the room) is attached to an indoor unit body suspended in a space above a ceiling. It has been proposed that, when the decorative panel is to be attached to the indoor unit body, the decorative panel is temporarily hung, for example, by hooking two temporary hanging levers disposed on the edge of an air inlet of the decorative panel on L-shaped temporary hanging hooks provided on the indoor unit body, and then the decorative panel is fixed to the indoor unit body with screws (see, for example, Patent Literature 1 and Patent Literature 2).
  • Patent Literature 3 discloses a cleaning unit for an air conditioning apparatus whereas Patent Literature 4 refers to an air-conditioner with a decoration panel.
  • the decorative panel when a decorative panel is to be attached to an indoor unit body above a ceiling, the decorative panel is often held by hooking the edges of two sides opposed to each other (opposed sides) of an air inlet with thumbs to stably lift the decorative panel.
  • temporary hanging levers are provided on the same side or two adjacent sides of the air inlet of the decorative panel and the decorative panel is to be temporarily hung on a case forming the indoor unit body, the opposed sides of the air inlet cannot be held and the decorative panel is to be lifted unstably.
  • An object of the present invention is to provide an indoor unit or the like in which a decorative panel can be easily temporarily hung.
  • An indoor unit includes a case having an opening part on a lower surface thereof when the indoor unit is installed, and a decorative panel having a rectangular air inlet being open to the opening part of the case and being attached to the lower surface of the case.
  • the decorative panel has temporary hanging levers attached to opposed positions shifted from midpoints on any opposed two of four sides on edges of the air inlet parallelly toward any opposed vertexes.
  • the case has temporary hanging hooks corresponding to the temporary hanging levers on edges of the opening part.
  • the temporary hanging levers hooked on the temporary hanging hooks of the case to temporarily hang the decorative panel are attached to opposed positions shifted from midpoints on opposed two sides on edges of the air inlet of the decorative panel parallelly toward opposed vertexes.
  • an installation worker can insert their fingers into the edges of the air inlet of the decorative panel, hold temporary hanging levers while pressing them with their fingers, and temporarily hang the decorative panel on the case in a stable state.
  • the worker can hold the temporary hanging levers in front of their head, and thus the temporary hanging levers are easily seen during the temporary hanging.
  • Fig. 1 is an exploded perspective view of an indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the upper side (vertical direction) in Fig. 1 will be referred to as the upper side
  • the lower side in Fig. 1 will be referred to as the lower side.
  • the indoor unit of the air-conditioning apparatus according to Embodiment 1 is connected with an outdoor unit by refrigerant pipes and forms a refrigerant circuit that circulates refrigerant and performs refrigeration, air conditioning, or the like.
  • the indoor unit of Embodiment 1 is a ceiling embedded indoor unit, and a four direction cassette type indoor unit will be described as an example thereof.
  • the indoor unit is installed in an indoor space 1.
  • a case (cabinet) 2 forming an indoor unit body housing an indoor fan, an indoor heat exchanger, and the like (not shown) is embedded in a ceiling recess of the indoor space.
  • the case 2 has a bell mouth 5 for rectifying air when the indoor fan is driven.
  • the case 2 of Embodiment 1 has, on the outside of the bell mouth 5, temporary hanging hooks 9 on which temporary hanging levers 8 of a decorative panel 3 described later are hooked to temporarily hang the decorative panel 3.
  • the temporary hanging hooks 9 are formed at positions corresponding to the temporary hanging levers 8 as described later.
  • the decorative panel 3 is attached to the lower part of the case 2 to cover the case 2 and to face the indoor side.
  • the central part of the decorative panel 3 is open in a substantially rectangular shape (square shape) (to have a rectangular shape).
  • This opening is an air inlet space 6 serving as an air inlet through which indoor air is sucked in when the indoor fan is driven.
  • the edges of four sides that surround the opening (define the air inlet space 6) are air inlet side surfaces 7.
  • a suction grille 4 covers the air inlet space 6. Air outlets through which air passing through the indoor heat exchanger is blown out into the room when the indoor fan is driven are provided along the air inlet side surfaces 7.
  • Embodiment 1 of edges of the four sides that are the air inlet side surfaces 7, a pair of sides opposed to one another each have a temporary hanging lever 8 attached to the air inlet side surface 7 thereof to protrude into the air inlet space 6.
  • the temporary hanging lever 8 is attached not to a central part of the air inlet side surface 7 (a position at the midpoint of the side) but to a position slightly shifted toward a vertex of the rectangle.
  • the temporary hanging levers 8 are attached to positions opposed to each other on two opposed sides (positions line-symmetric with respect to a line parallel to the two opposed sides and passing through the center of the air inlet space 6 (positions in a mirror-image relationship)). Attaching the temporary hanging levers 8 to positions shifted from the centers makes the temporary hanging levers 8 and the temporary hanging hooks 9 easily seen when the decorative panel 3 is lifted and temporarily hung on the case 2, facilitating the temporary hanging.
  • Fig. 2 is an enlarged view showing a state before the temporary hanging of the temporary hanging lever 8 disposed on the air inlet side surface 7 on the indoor unit according to Embodiment 1 of the present invention.
  • the temporary hanging lever 8 is formed of, for example, iron wire.
  • the temporary hanging lever 8 is formed by processing iron wire, and has a hook portion 8a, rotating shaft portions 8b and 8c, and an operating portion 8d.
  • the hook portion 8a has a space that enables the hook portion 8a to be hooked on the temporary hanging hook 9 of the case 2.
  • the hook portion 8a is formed in a substantially U-shape.
  • the rotating shaft portions 8b and 8c are inserted, utilizing the elasticity of iron wire, into bearing holes 7a and 7b formed on the air inlet side surface 7.
  • the rotating shaft portions 8b and 8c serve as rotating shafts when the temporary hanging lever 8 turns.
  • the present invention is not limited to this configuration as long as the temporary hanging lever 8 can be turned.
  • the operating portion 8d is formed of two pieces of iron wire, and is a part on which a finger (thumb) is placed, for example, when a person lifts the decorative panel 3 and turns the temporary hanging lever 8.
  • Fig. 3 is a view showing a state where the decorative panel 3 according to Embodiment 1 of the present invention is temporarily hung on the case 2.
  • the decorative panel 3 has, in the four corners thereof, installation screw portions 10 for installing and fixing the decorative panel 3 with screws.
  • Fig. 4 is an enlarged view of the temporary hanging lever 8 and the temporary hanging hook 9 according to Embodiment 1 of the present invention.
  • a person applies a force, with their finger, to the operating portion 8d of the temporary hanging lever 8 protruding into the air inlet space 6 before the temporary hanging, and the hook portion 8a is thereby hooked on the temporary hanging hook 9 while the temporary hanging lever 8 is turned as shown in Fig. 4 .
  • the temporary hanging lever 8 is caused to get over a protruding portion 7c of the air inlet side surface 7 utilizing the elasticity of iron wire so that the protruding portion 7c prevents the temporary hanging lever 8 from turning again toward the air inlet space 6.
  • the decorative panel 3 is temporarily hung on the case 2, the decorative panel 3 is fixed with screws to the case 2 through the installation screw portions 10 in the four corners of the decorative panel 3.
  • Fig. 5 is a front view of the indoor unit in a state where the decorative panel 3 according to Embodiment 1 of the present invention is temporarily hung on the case 2.
  • the temporary hanging lever 8 and the temporary hanging hook 9 are disposed at positions shifted from the central part of the air inlet side surface 7 of the decorative panel 3. For example, if a person holds the decorative panel 3 that is rotated 180 degrees from the correct orientation by mistake when attaching the decorative panel 3 to the case 2, the temporary hanging levers 8 are not aligned with the temporary hanging hooks 9, and the temporary hanging cannot be performed. Thus, wrong attachment can be prevented.
  • the temporary hanging levers 8 of which the hook portion 8a are hooked on the temporary hanging hooks 9 of the case 2 to temporarily hang the decorative panel 3 are attached to opposed positions shifted from midpoints on opposed two sides of the air inlet side surfaces 7 on edges of the air inlet formed on the decorative panel 3 parallelly toward opposed vertexes.
  • a worker can hold the edges of the air inlet while pressing the temporary hanging levers 8 with their thumbs, and temporarily hang the decorative panel 3 on the case 2 in a stable state.
  • the worker can hold the temporary hanging levers 8 in front of their head, and thus the temporary hanging levers 8 are easily seen during the temporary hanging.
  • the worker can attach even a square decorative panel 3 such as a four direction cassette type without any error in the orientation of installation, for example, without attaching in an orientation rotated 180 degrees.
  • the decorative panel 3 can be easily screwed to the case.
  • the worker pushes up the operating portions 8d of the temporary hanging levers 8 protruding into the air inlet space 6 with their thumbs or the like to turn the temporary hanging levers 8 so that the hook portions 8a are hooked on the temporary hanging hooks 9 of the case 2.
  • the temporary hanging can be easily performed.
  • the temporary hanging levers 8 By causing the operating portions 8d of the temporary hanging levers 8 to get over the protruding portions 7c when turning the temporary hanging levers 8, the temporary hanging levers 8 can be fixed in an upward position, facilitating the temporary hanging.
  • Fig. 6 is a perspective view showing a state where a raisable and lowerable electric component box 11 according to Embodiment 2 of the present invention is attached to the decorative panel 3.
  • the raisable and lowerable electric component box 11 is a box (case) that houses electric components (not shown) such as a drive circuit for driving a fan or the like of the indoor unit. For example, by detaching the suction grille 4 and turning the raisable and lowerable electric component box 11, the electric components can be raised and lowered together with the box.
  • the direction of shifting is not particularly limited.
  • the center of gravity which is normally at substantially the center of the air inlet, moves forward when the raisable and lowerable electric component box 11 is attached to the decorative panel 3.
  • the temporary hanging lever 8 is shifted toward a position on which the raisable and lowerable electric component box 11 is installed.
  • the raisable and lowerable electric component box 11 is located on the position in front of the worker, and thus the worker can stably lift the decorative panel 3 on which the raisable and lowerable electric component box 11 is installed.
  • the raisable and lowerable electric component box 11 when the raisable and lowerable electric component box 11 is attached to an air inlet side surface 7, the position of the center of gravity of the decorative panel 3 shifts from the center to the side of the position where the raisable and lowerable electric component box 11 is attached.
  • the temporary hanging levers 8 are disposed on the positions shifted from the center of the air inlet space 6 toward the position on which the raisable and lowerable electric component box 11 is installed, the temporary hanging can be performed such that the balance of the decorative panel 3 is kept even when the decorative panel 3 is lifted and the temporary hanging levers 8 are hooked on the temporary hanging hooks 9 of the case 2.
  • Fig. 7 is a diagram showing an example configuration of a refrigeration cycle apparatus according to Embodiment 3 of the present invention.
  • an air-conditioning apparatus is shown as a refrigeration cycle apparatus.
  • an outdoor unit 300 and the indoor unit 200 described in Embodiment 1 and Embodiment 2 are connected by a gas refrigerant pipe 400 and a liquid refrigerant pipe 500.
  • the outdoor unit 300 includes a compressor 311, a four-way valve 312, an outdoor heat exchanger 313, and an expansion valve 314.
  • the compressor 311 compresses and discharges sucked refrigerant.
  • the compressor 311 may have a capability of varying the capacity (the amount of refrigerant fed per unit time) by arbitrarily varying the operating frequency, for example, with an inverter circuit.
  • the four-way valve 312 is a valve for switching the flow of refrigerant, for example, between the flow for a cooling operation and the flow for a heating operation.
  • the outdoor heat exchanger 313 exchanges heat between refrigerant and air (outdoor air). For example, during the heating operation, the outdoor heat exchanger 313 functions as an evaporator, and evaporates and gasifies refrigerant. During the cooling operation, the outdoor heat exchanger 313 functions as a condensor, and condenses and liquefies refrigerant.
  • the expansion valve 314 of an expansion device (flow rate control unit) or the like decompresses and expands refrigerant.
  • the expansion valve 314 is an electronic expansion valve or the like
  • the opening degree is adjusted based on the instruction of a control unit (not shown) or the like.
  • the indoor heat exchanger 211 of the indoor unit 200 exchanges heat, for example, between air in the indoor space 1 and refrigerant.
  • the indoor heat exchanger 211 functions as a condensor, and condenses and liquefies refrigerant.
  • the indoor heat exchanger 211 functions as an evaporator, and evaporates and gasifies refrigerant.
  • the cooling operation of the refrigeration cycle apparatus will be described based on the flow of refrigerant.
  • the four-way valve 312 is switched to establish a connection relationship shown by solid lines.
  • High-temperature high-pressure gas refrigerant compressed and discharged by the compressor 311 passes through the four-way valve 312 and flows into the outdoor heat exchanger 313.
  • the refrigerant condensed and liquefied by passing through the outdoor heat exchanger 313 and exchanging heat with the outdoor air (liquid refrigerant) flows into the expansion valve 314.
  • the refrigerant brought into a two-phase gas-liquid state by being decompressed by the expansion valve 314 flows out of the outdoor unit 300.
  • the two-phase gas-liquid refrigerant flowing out of the outdoor unit 300 flows through the liquid refrigerant pipe 500 into the indoor unit 200, and passes through the indoor heat exchanger 211.
  • the refrigerant evaporated and gasified by exchanging heat, for example, with the air in the indoor space 1 (gas refrigerant) flows out of the indoor unit 200.
  • the gas refrigerant flowing out of the indoor unit 200 flows through the gas refrigerant pipe 400 into the outdoor unit 300.
  • the refrigerant then passes through the four-way valve 312 and is sucked into the compressor 311 again.
  • the refrigerant of the air-conditioning apparatus is circulated and air-conditioning (cooling) is performed.
  • the heating operation will be described based on the flow of refrigerant.
  • the four-way valve 312 is switched to establish a connection relationship shown by dotted lines.
  • High-temperature high-pressure gas refrigerant compressed and discharged by the compressor 311 passes through the four-way valve 312 and flows out of the outdoor unit 300.
  • the gas refrigerant flowing out of the outdoor unit 300 flows through the gas refrigerant pipe 400 into the indoor unit 200.
  • the refrigerant condensed and liquefied by exchanging heat, for example, with air in the indoor space 1 while passing through the indoor heat exchanger 211 flows out of the indoor unit 200.
  • the refrigerant flowing out of the indoor unit 200 flows through the liquid refrigerant pipe 500 into the outdoor unit 300.
  • the refrigerant brought into a two-phase gas-liquid state by being decompressed by the expansion valve 314 flows into the outdoor heat exchanger 313.
  • the refrigerant evaporated and gasified by passing through the outdoor heat exchanger 313 and exchanging heat with the outdoor air (gas refrigerant) passes through the four-way valve 312 and is sucked into the compressor 311 again.
  • the refrigerant of the air-conditioning apparatus is circulated and air-conditioning (heating) is performed.
  • the air-conditioning apparatus (refrigeration cycle apparatus) of Embodiment 3 achieves the same advantageous effects as those of Embodiments 1 and 2 by employing the indoor unit 200 described in Embodiments 1 and 2 to form the configuration.
  • Embodiments 1 to 3 a four direction cassette type ceiling embedded indoor unit that blows out air in four directions has been described, the technique herein can also be applied to indoor units that blow out air, for example, in two directions and three directions.
  • an air-conditioning apparatus has been described as an example of a refrigeration cycle apparatus
  • the technique herein can also be applied, for example, to a refrigerating apparatus or the like that is another refrigerating cycle apparatus.
  • the technique herein can be applied not only to refrigeration cycle apparatus but also, for example, to a ventilation apparatus as long as it is covered by the scope of the appended claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
EP14826379.1A 2013-07-18 2014-05-29 Indoor unit and refrigeration cycle device Active EP3023708B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013149551A JP5972228B2 (ja) 2013-07-18 2013-07-18 室内機及び冷凍サイクル装置
PCT/JP2014/064342 WO2015008546A1 (ja) 2013-07-18 2014-05-29 室内機及び冷凍サイクル装置

Publications (3)

Publication Number Publication Date
EP3023708A1 EP3023708A1 (en) 2016-05-25
EP3023708A4 EP3023708A4 (en) 2017-03-01
EP3023708B1 true EP3023708B1 (en) 2019-08-28

Family

ID=52204785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14826379.1A Active EP3023708B1 (en) 2013-07-18 2014-05-29 Indoor unit and refrigeration cycle device

Country Status (7)

Country Link
US (1) US20160102906A1 (ja)
EP (1) EP3023708B1 (ja)
JP (1) JP5972228B2 (ja)
CN (2) CN104296239B (ja)
AU (1) AU2014291455B2 (ja)
MX (1) MX368967B (ja)
WO (1) WO2015008546A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5972228B2 (ja) * 2013-07-18 2016-08-17 三菱電機株式会社 室内機及び冷凍サイクル装置
US10222090B2 (en) 2015-09-01 2019-03-05 Mitsubishi Electric Corporation Indoor unit for air-conditioning apparatus, and air-conditioning apparatus
JP6932258B2 (ja) * 2018-06-11 2021-09-08 三菱電機株式会社 空気調和機の室内機
DE102019210222B4 (de) * 2019-07-10 2021-02-11 Dometic Sweden Ab Kompressor-Kühlaggregat für einen Kühlschrank oder einen Kühler

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Also Published As

Publication number Publication date
US20160102906A1 (en) 2016-04-14
AU2014291455B2 (en) 2016-09-29
EP3023708A4 (en) 2017-03-01
MX368967B (es) 2019-10-23
MX2016000589A (es) 2016-03-16
WO2015008546A1 (ja) 2015-01-22
CN204063286U (zh) 2014-12-31
CN104296239A (zh) 2015-01-21
CN104296239B (zh) 2017-05-17
AU2014291455A1 (en) 2016-01-28
EP3023708A1 (en) 2016-05-25
JP5972228B2 (ja) 2016-08-17
JP2015021662A (ja) 2015-02-02

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