EP2993424B1 - Decorative panel for air conditioner, and in-room unit - Google Patents

Decorative panel for air conditioner, and in-room unit Download PDF

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Publication number
EP2993424B1
EP2993424B1 EP14792126.6A EP14792126A EP2993424B1 EP 2993424 B1 EP2993424 B1 EP 2993424B1 EP 14792126 A EP14792126 A EP 14792126A EP 2993424 B1 EP2993424 B1 EP 2993424B1
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EP
European Patent Office
Prior art keywords
panel
extension portion
indoor
outer peripheral
indoor unit
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
EP14792126.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2993424A1 (en
EP2993424A4 (en
Inventor
Nobuyuki Kojima
Yoshiteru Nouchi
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of EP2993424A1 publication Critical patent/EP2993424A1/en
Publication of EP2993424A4 publication Critical patent/EP2993424A4/en
Application granted granted Critical
Publication of EP2993424B1 publication Critical patent/EP2993424B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—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
    • 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
    • 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
    • F24F2221/26—Details or features not otherwise provided for improving the aesthetic appearance

Definitions

  • This invention relates to a decorative panel for an air conditioner, and an indoor unit for an air conditioner including the decorative panel, and more particularly relates to a decorative panel attached to a lower portion of an indoor unit body inserted into an opening in a ceiling.
  • Patent Documents 1 and 2 describe an indoor unit that includes an indoor unit body housing therein an indoor fan, an indoor heat exchanger, and other components and embedded in a ceiling, and a decorative panel attached to a lower portion of the indoor unit body.
  • Patent Document 3 Another example can be seen in Patent Document 3.
  • the invention provides a decorative panel (40) for an air conditioner (1), attached to a lower portion of an indoor unit body (30) inserted and installed in an opening (O) of a ceiling (U).
  • the decorative panel (40) includes: a panel body (41) including a panel central portion (400) having an inlet (401a) and an outlet (402a) and covering a lower surface of the indoor unit body (30), and a panel extension portion (404) extending from an entire periphery of the panel central portion (400) along a ceiling surface (U1).
  • a movement restrictor (60) for restricting movement of water from an outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1) is provided on an outer peripheral surface (404a) of the panel extension portion (404), and is formed along an outer periphery of the panel extension portion (404).
  • the movement restrictor (60) formed on the outer peripheral surface (404a) of the panel extension portion (404) allows for restricting the movement of condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1).
  • the movement restrictor (60) may be configured as a notch (61) formed along an upper end of the outer peripheral surface (404a) of the panel extension portion (404).
  • the notch (61) formed along the upper end of the outer peripheral surface (404a) of the panel extension portion (404) allows for forming a clearance between the ceiling surface (U1) and the outer peripheral surface (404a) of the panel extension portion (404).
  • the movement of condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1) is restricted.
  • the movement restrictor (60) may be configured as a groove (62) extending along an upper end portion of the outer peripheral surface (404a) of the panel extension portion (404).
  • the groove (62) formed to extend along the upper end portion of the outer peripheral surface (404a) of the panel extension portion (404) allows for restricting the movement of condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1).
  • a lower surface (404u) of the panel extension portion (404) may be flat, and the outer peripheral surface (404a) of the panel extension portion (404) may be formed to substantially vertically extend from the lower surface (404u) of the panel extension portion (404) toward the ceiling surface (U1).
  • the outer peripheral surface (404a) of the panel extension portion (404) is formed to substantially vertically extend from the lower surface (404u) of the panel extension portion (404) toward the ceiling surface (U1), thereby reducing the area of the decorative panel (40) as viewed in plan.
  • a third aspect of the invention provides an indoor unit (20) for an air conditioner (1).
  • the indoor unit (20) includes: an indoor unit body (30) inserted and installed in an opening (O) of a ceiling (U); and a decorative panel (40) attached to a lower portion of the indoor unit body (30).
  • the decorative panel (40) is configured as the decorative panel (40) of any one of the first through fourth aspects of the invention.
  • the penetration of condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) into the ceiling surface (U1) can be reduced.
  • the movement of condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1) can be restricted.
  • the penetration of condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) into the ceiling surface (U1) can be reduced.
  • the area of the decorative panel (40) as viewed in plan can be reduced, and the decorative panel (40) can be downsized.
  • the penetration of condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) into the ceiling surface (U1) can be reduced.
  • degradation of the ceiling surface (U1) due to penetration of condensed water (W) thereinto can be reduced.
  • FIG. 1 shows an exemplary configuration for an air conditioner (1).
  • This air conditioner (1) cools and heats the inside of a room, and includes an outdoor unit (10) installed outside the room, and an indoor unit (20) installed in the room.
  • the outdoor and indoor units (10) and (20) are connected together via a liquid communication pipe (P1) and a gas communication pipe (P2), thereby constituting a refrigerant circuit (C).
  • This refrigerant circuit (C) performs a vapor compression refrigeration cycle by circulating a refrigerant that fills the refrigerant circuit (C).
  • the outdoor unit (10) includes a compressor (11), an outdoor heat exchanger (12), an outdoor expansion valve (13), a four-way switching valve (14), a liquid stop valve (V1) connected to one end of the liquid communication pipe (P1), and a gas stop valve (V2) connected to one end of the gas communication pipe (P2).
  • an outdoor fan (15) for transferring outdoor air to the outdoor heat exchanger (12) is provided in the vicinity of the outdoor heat exchanger (12).
  • the outdoor fan (15) is configured as a propeller fan, and includes an outdoor fan motor (15a) as its power source.
  • the outdoor fan motor (15a) is capable of varying its rotational speed using an inverter device (not shown).
  • the compressor (11) compresses a low-pressure refrigerant, and discharges the compressed refrigerant as a high-pressure refrigerant.
  • the compressor (11) includes a scroll, rotary, or any other suitable type of compression mechanism, and a compressor motor (11a) for driving the compression mechanism.
  • the compressor motor (11a) is capable of varying its rotational speed (operating frequency) using an inverter device (not shown).
  • the outdoor heat exchanger (12) is configured to make outdoor air transferred by the outdoor fan (15) exchange heat with a refrigerant flowing through the outdoor heat exchanger (12).
  • the outdoor heat exchanger (12) is configured as a fin-and-tube heat exchanger, for example.
  • the outdoor expansion valve (13) is connected between a liquid-side end of the outdoor heat exchanger (12) and the liquid stop valve (V1), and decompresses a refrigerant passing through the outdoor expansion valve (13).
  • the outdoor expansion valve (13) is configured as an electronic expansion valve with a variable degree of opening, for example.
  • the four-way switching valve (14) has first through fourth ports.
  • the first port is connected to a discharge side end of the compressor (11)
  • the second port is connected to a suction side end of the compressor
  • the third port is connected to a gas-side end of the outdoor heat exchanger (12)
  • the fourth port is connected to the gas stop valve (V2).
  • the four-way switching valve (14) can switch between a first state (the state indicated by the solid lines in FIG. 1 ) and a second state (the state indicated by the broken lines in FIG. 1 ).
  • the first and third ports of the four-way switching valve (14) communicate with each other, and the second and fourth ports thereof communicate with each other.
  • the second state the first and fourth ports of the four-way switching valve (14) communicate with each other, and the second and third ports thereof communicate with each other.
  • the indoor unit (20) includes an indoor expansion valve (21), and an indoor heat exchanger (22).
  • An indoor fan (23) for transferring indoor air to the indoor heat exchanger (22) is provided in the vicinity of the indoor heat exchanger (22).
  • the indoor fan (23) is configured as a centrifugal blower, and includes an indoor fan motor (23a) as its power source.
  • the indoor fan motor (23a) is capable of varying its rotational speed using an inverter device (not shown).
  • the indoor expansion valve (21) is connected between the other end of the liquid communication pipe (P1) and a liquid-side end of the indoor heat exchanger (22), and decompresses a refrigerant passing through the indoor expansion valve (21).
  • the indoor expansion valve (21) is configured as an electronic expansion valve with a variable degree of opening, for example.
  • the indoor heat exchanger (22) is configured to make indoor air transferred by the indoor fan (23) exchange heat with a refrigerant flowing through the indoor heat exchanger (22).
  • the indoor heat exchanger (22) is configured as a fin-and-tube heat exchanger.
  • a gas-side end of the indoor heat exchanger (22) is connected to the other end of the gas communication pipe (P2).
  • This air conditioner (1) can switch between a cooling operation and a heating operation.
  • the four-way switching valve (14) is in the first state (the state indicated by the solid lines in FIG. 1 ), and the compressor (11), the outdoor fan (15), and the indoor fan (23) are in operation. Accordingly, in the refrigerant circuit (C), the outdoor heat exchanger (12) functions as a condenser, and the indoor heat exchanger (22) functions as an evaporator. Specifically, the high-pressure refrigerant compressed by the compressor (11) flows into the outdoor heat exchanger (12), and dissipates heat to outdoor air in the outdoor heat exchanger (12) to condense.
  • the refrigerant that has condensed in the outdoor heat exchanger (12) is decompressed by the outdoor expansion valve (13) and the indoor expansion valve (21), then flows into the indoor heat exchanger (22), and absorbs heat from indoor air in the indoor heat exchanger (22) to evaporate. Thus, the indoor air is cooled.
  • the refrigerant that has evaporated in the indoor heat exchanger (22) is sucked into the compressor (11), and is again compressed.
  • the four-way switching valve (14) is in the second state (the state indicated by the broken lines in FIG. 1 ), and the compressor (11), the outdoor fan (15), and the indoor fan (23) are in operation. Accordingly, in the refrigerant circuit (C), the indoor heat exchanger (22) functions as a condenser, and the outdoor heat exchanger (12) functions as an evaporator. Specifically, the high-pressure refrigerant compressed by the compressor (11) flows into the indoor heat exchanger (22), and dissipates heat to indoor air in the indoor heat exchanger (22) to condense. Thus, the indoor air is heated.
  • the refrigerant that has condensed in the indoor heat exchanger (22) is decompressed by the indoor expansion valve (21) and the outdoor expansion valve (13), then flows into the outdoor heat exchanger (12), and absorbs heat from the indoor air in the outdoor heat exchanger (12) to evaporate.
  • the refrigerant that has evaporated in the outdoor heat exchanger (12) is sucked into the compressor (11), and is again compressed.
  • the indoor unit (20) is configured so as to be embedded in a ceiling, and includes an indoor unit body (30) inserted into an opening (O) of a ceiling (U) facing an indoor space (R), and a decorative panel (40) attached to a lower portion of the indoor unit body (30).
  • the indoor unit body (30) is suspended in a space above the ceiling (U) (that is, a roof space) by a suspending mechanism (not shown).
  • the decorative panel (40) attached to the lower portion of the indoor unit body (30) blocks the opening (O) of the ceiling (U) and a lower surface of the indoor unit body (30).
  • the indoor unit body (30) includes a casing (31).
  • the casing (31) is formed in the shape of a substantially rectangular parallelepiped box having an open lower face, and includes a top (31a) being in the shape of a substantially square plate, and four side plates (31b) being in the shape of a substantially rectangular plate and extending downward from the edges of the top (31a).
  • the casing (31) houses the indoor expansion valve (21), the indoor heat exchanger (22), the indoor fan (23), a drain pan (32), and a bell mouth (33).
  • a body side heat insulator (34) is further provided inside the casing (31).
  • FIG. 2 is a general view illustrating the appearance of the indoor unit (20) as viewed obliquely from below.
  • FIG. 3 is a general longitudinal cross-sectional view of the indoor unit (20).
  • FIG. 4 is a general plan view, as viewed from above, of the indoor unit (20) with the top (31a) of the casing (31) and the body side heat insulator (34) removed therefrom.
  • FIG. 3 corresponds to the longitudinal cross-sectional structure taken along the plane III-III in FIG. 4 .
  • the body side heat insulator (34) is formed in the shape of a substantially rectangular parallelepiped box having an open lower face, and includes a top heat insulating portion (34a) formed along the top (31a) of the casing (31), and four side plate heat insulating portions (34b) extending downward from the edges of the top heat insulating portion (34a) along the four side plates (31b) of the casing (31).
  • a central portion of the top heat insulating portion (34a) has a circular opening (34c) through which an upper end portion of the indoor fan motor (23a) is insertable. Note that in order to allow the drain pan (32) to be housed in the casing (31), the vertical length of the side plate side heat insulating portions (34b) is shorter than that of the side plates (31b).
  • the indoor fan (23) is arranged centrally in the casing (31).
  • the indoor fan (23) includes the indoor fan motor (23a), a hub (23b), a shroud (23c), and an impeller (23d).
  • the indoor fan motor (23a) is attached to the top (31a) of the casing (31) such that the upper end portion of the indoor fan motor (23a) is inserted through the opening (34c) of the top heat insulating portion (34a). Thus, the indoor fan motor (23a) is supported by the top (31a) of the casing (31).
  • the hub (23b) includes an annular base part formed radially outward from the indoor fan motor (23a), and a central protrusion part protruding downward from the inner peripheral edge of the base part, and is fixed to a lower end of a rotating shaft of the indoor fan motor (23a).
  • the shroud (23c) has a cylindrical shape that has a circular opening at each of the upper and lower ends and a cross-sectional area that decreases from the upper end toward the lower end, and is arranged below the base part of the hub (23b) to face the base part of the hub (23b) with a predetermined space therebetween.
  • the impeller (23d) includes a plurality of turbo blades arranged along the direction of rotation of the indoor fan motor (23a), and is provided in an impeller accommodation space (230) between the hub (23b) and the shroud (23c).
  • the indoor heat exchanger (22) includes a refrigerant pipe (heat transfer tube) bent to surround the indoor fan (23), and is arranged in a vertically upright position. Also, an upper end portion of the indoor heat exchanger (22) is in contact with the top heat insulating portion (34a) of the body side heat insulator (34).
  • the drain pan (32) is formed in the shape of a vertically thin, substantial rectangular parallelepiped, and is arranged below the indoor heat exchanger (22). Also, an upper surface of the drain pan (32) is in contact with a lower end portion of the indoor heat exchanger (22).
  • the drain pan (32) includes an inner wall portion (32a), an outer wall portion (32b), and a water receiving portion (32c).
  • the inner wall portion (32a) annularly extends along the inner periphery of the indoor heat exchanger (22), and is formed in the shape of an upright vertical wall.
  • the outer wall portion (32b) annularly extends along the four side plates (31b) of the casing (31), and is formed in the shape of an upright vertical wall.
  • the water receiving portion (32c) is formed in the shape of a groove annularly extending along the gap between the inner and outer wall portions (32a) and (32b) so that water condensed in the indoor heat exchanger (22) can be collected.
  • an accommodation opening (301) that vertically passes through the drain pan is formed inside the inner wall portion (32a) of the drain pan (32) to accommodate the bell mouth (33).
  • the outer wall portion (32b) of the drain pan (32) has four body side discharge channels (302) each extending along an associated one of the four side plates (31b) of the casing (31) and vertically passing through the drain pan.
  • an outer peripheral portion of the outer wall portion (32b) of the drain pan (32) (more specifically, a portion thereof outside the body side discharge channels (302)) is in contact with the lower ends of the four side plate heat insulating portions (34b) of the body side heat insulator (34).
  • the bell mouth (33) has a cylindrical shape that has a circular opening at each of the upper and lower ends and a cross-sectional area that increases from the upper end toward the lower end.
  • the bell mouth (33) is inserted into the accommodation opening (301) of the drain pan (32) such that its upper end is inserted into the lower opening of the shroud (23c) of the indoor fan (23). This allows the internal space of the bell mouth (33) to communicate with the impeller accommodation space (230) of the indoor fan (23).
  • the decorative panel (40) includes a panel body (41) formed in the shape of a vertically thin, substantial rectangular parallelepiped, and a suction grille (42) formed in the shape of a substantially square plate.
  • the panel body (41) is attached to a lower portion of the casing (31) to cover a lower surface (an open lower face) of the casing (31).
  • the panel body (41) has a panel side suction channel (401), four panel side discharge channels (402), and four panel side surface recesses (403).
  • a panel extension portion (404) in the shape of a substantially rectangular frame is provided around a lower end portion of the panel body (41), and extends outward along a ceiling surface (U1).
  • the panel side suction channel (401) is formed in a central portion of the panel body (41), and vertically passes through the central portion of the panel body (41) to communicate with the internal space of the bell mouth (33) of the indoor unit body (30). Furthermore, an inlet (401a) facing the indoor space (R) is formed at the lower end of the panel side suction channel (401). In other words, the panel side suction channel (401) allows communication between the inlet (401a) of the panel body (41) and the internal space of the bell mouth (33) of the indoor unit body (30).
  • a dust collecting filter (43) for trapping dust in air sucked through the inlet (401a) is provided in the panel side suction channel (401).
  • the four panel side discharge channels (402) are formed in the panel body (41) and outside the panel side suction channel (401) to surround the panel side suction channel (401). More particularly, the four panel side discharge channels (402) extend along four associated side portions of the panel body (41), and vertically pass through the four side portions of the panel body (41) to communicate with the four body side discharge channels (302) of the indoor unit body (30). Moreover, four outlets (402a) are formed at the lower ends of the four associated panel side discharge channels (402). In other words, the four panel side discharge channels (402) allow communication between the four outlets (402a) of the panel body (41) and the four body side discharge channels (302) of the indoor unit body (30).
  • Each of the four panel side discharge channels (402) includes a wind direction adjusting blade (44) for adjusting the direction of air flowing through the panel side discharge channel (402).
  • the wind direction adjusting blade (44) is formed in the shape of a substantially rectangular plate extending from one longitudinal end of the panel side discharge channel (402) toward the other longitudinal end, and is arranged in a lower end portion of the panel side discharge channel (402). Also, both longitudinal end portions of the wind direction adjusting blade (44) are each provided with a rotating shaft (44a) rotatably supported on the panel body (41). This allows the wind direction adjusting blade (44) to rotate around the rotating shafts (44a).
  • the four panel side surface recesses (403) are formed on four associated outer side surfaces of the panel body (41), and extend from the four associated outer side surfaces of the panel body (41) toward the four associated panel side discharge channels (402).
  • the longitudinal length of the panel side surface recesses (403) is substantial equal to that of the panel side discharge channels (402).
  • the four inner heat insulating members (45) are arranged inside the four associated panel side discharge channels (402) (that is, near the center of the panel body (41)).
  • the four panel side surface recesses (403) include four associated outer heat insulating members (46).
  • four inner seal members (47) are interposed between upper surfaces of the four associated inner heat insulating members (45) and a lower surface of the drain pan (32) of the indoor unit body (30).
  • four inner seal members (47) are interposed between upper surfaces of the four associated outer heat insulating members (46) and the lower surface of the drain pan (32) of the indoor unit body (30).
  • an outer seal member (48) is interposed between an upper surface of the panel extension portion (404) and the ceiling surface (U1).
  • the suction grille (42) is attached to a lower portion of the panel body (41) to cover a lower end (that is, the inlet (401a)) of the panel side suction channel (401) of the panel body (41).
  • the suction grille (42) includes a grille body (42a) and a grille extending portion (42b).
  • the grille body (42a) is formed in the shape of a substantially square plate, and covers the lower end (that is, the inlet (401a)) of the panel side suction channel (401) of the panel body (41).
  • a central portion of the grille body (42a) has many suction holes (420) arranged in a grid pattern.
  • the many suction holes (420) vertically pass through the central portion of the grille body (42a).
  • the cross section of an opening of each suction hole (420) is formed in the shape of a substantial square.
  • the grille extending portion (42b) is formed in the shape of a substantially square frame extending outward from the entire perimeter of the grille body (42a) toward the four outlets (402a) of the panel body (41). Furthermore, when viewed in plan, the grille extending portion (42b) overlaps with lower surfaces of the four inner heat insulating members (45) arranged inside the four panel side discharge channels (402) of the panel body (41). Note that when viewed in plan, the outer edges of the grille extending portion (42b) are located inside (closer to the grille body (42a) than) the inner edges of the four outlets (402a) of the panel body (41).
  • the indoor heat exchanger (22) While the air discharged from the indoor fan (23) passes through the indoor heat exchanger (22), the air exchanges heat with a refrigerant flowing through the indoor heat exchanger (22).
  • the indoor heat exchanger (22) functions as an evaporator (that is, in the cooling operation)
  • the air passing through the indoor heat exchanger (22) is cooled
  • the indoor heat exchanger (22) functions as a condenser (that is, in the heating operation) the air is heated.
  • the air that has passed through the indoor heat exchanger (22) is divided to flow into the four body side discharge channels (302) of the indoor unit body (30), then flows downward through the four panel side discharge channels (402) of the decorative panel (40), and is discharged through the four outlets (402a) to the indoor space (R).
  • An electrical component box (50) is provided on the outer side surface of one of the side plates (31b) of the casing (31) (hereinafter referred to as the "outer mounting surface (310)").
  • the electrical component box (50) is formed in the shape of a horizontally oriented rectangular parallelepiped box, and houses a controller (such as a microcomputer or memory) for controlling an operation of each of components of the indoor unit (20) (such as the indoor fan (23)).
  • a liquid-side connection pipe (P3) and a gas-side connection pipe (P4) pass through the outer mounting surface (310) of the casing (31).
  • the liquid-side connection pipe (P3) is a connection pipe communicating with a liquid pipe arranged in the casing (31) (in this example, a liquid pipe connected to the liquid-side end of the indoor heat exchanger (22)), and is connected to the liquid communication pipe (P1).
  • the gas-side connection pipe (P4) is a connection pipe communicating with a gas pipe arranged in the casing (31) (in this example, a gas pipe connected to the gas-side end of the indoor heat exchanger (22)), and is connected to the gas communication pipe (P2).
  • FIG. 5 is a general plan view of the decorative panel (40) as viewed from below.
  • FIG. 6 is a general fragmentary longitudinal cross-sectional view illustrating, on an enlarged scale, the panel extension portion (404) of the decorative panel (40).
  • the panel body (41) of the decorative panel (40) has the inlet (401a) (the panel side suction channel (401)) and the four outlets (402a) (the panel side discharge channels (402)), and the panel extension portion (404) extending outward along the ceiling surface (U1) is provided around the lower end portion of the panel body (41).
  • the panel body (41) covering the lower face of the indoor unit body (30) (more specifically, the open lower surface of the casing (31)) is referred to as the "panel central portion (400)," the panel body (41) includes the panel central portion (400) and the panel extension portion (404).
  • the panel central portion (400) is formed in the shape of a vertically thin, substantial rectangular parallelepiped, and is attached to the lower portion of the indoor unit body (30) to cover the lower surface of the indoor unit body (30).
  • the panel central portion (400) has the inlet (401a) (the panel side suction channel (401)) and the four outlets (402a) (the panel side discharge channels (402)).
  • the four outer side surfaces of the panel central portion (400) each have the panel side surface recess (403) (see FIG. 3 ).
  • a lower surface (400u) of the panel central portion (400) is flat, and extends in a horizontal direction to be substantially parallel to the ceiling surface (U1).
  • the panel extension portion (404) is formed in the shape of a substantially rectangular frame extending from the entire perimeter of the panel central portion (400) (more specifically, the perimeter of the lower end portion of the panel central portion (400)) along the ceiling surface (U1).
  • the periphery of the outer panel extension portion (404) is located outside the edge of the opening (O) of the ceiling (U) as viewed in plan.
  • the opening (O) of the ceiling (U) into which the indoor unit body (30) is inserted is blocked by the decorative panel (40).
  • a lower surface (404u) of the panel extension portion (404) is flat, and extends in a horizontal direction to be substantially parallel to the ceiling surface (U1).
  • an outer peripheral surface (404a) of the panel extension portion (404) substantially vertically extends from the lower surface (404u) of the panel extension portion (404) toward the ceiling surface (U1).
  • a movement restrictor (60) for restricting movement of water from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1) is provided on the outer peripheral surface (404a) of the panel extension portion (404), and is formed along the periphery of the panel extension portion (404).
  • the movement restrictor (60) is configured as a notch (61) formed along the upper end of the outer peripheral surface (404a) of the panel extension portion (404).
  • the notch (61) (the movement restrictor (60)) is formed along the entire periphery of the panel extension portion (404).
  • FIG. 7 is a general fragmentary longitudinal cross-sectional view corresponding to FIG. 6
  • FIG. 8 is a general fragmentary plan view illustrating, on an enlarged scale, a portion of the decorative panel (40) as viewed from below. Note that in FIG. 8 , the wind direction adjusting blade (44) is not shown.
  • This air flow causes negative pressure to be generated forward of the outer peripheral surface (404a) of the panel extension portion (404), and indoor air (warm air) is suctioned forward of the outer peripheral surface (404a) of the panel extension portion (404) from a lateral side of this air flow.
  • the air (cold air) flowing along the lower surface (404u) of the panel extension portion (404) cools the lower surface (404u) and a lower end portion of the outer peripheral surface (404a) of the panel extension portion (404).
  • the indoor air (warm air) suctioned forward of the outer peripheral surface (404a) of the panel extension portion (404) collides with the outer peripheral surface (404a) of the panel extension portion (404) condensation will occur on the lower end portion of the outer peripheral surface (404a) of the panel extension portion (404), and condensed water (W) will adhere thereto. This condensed water (W) will increase and extend toward the upper end of the outer peripheral surface (404a) of the panel extension portion (404).
  • the notch (61) (the movement restrictor (60)) is formed along the upper end of the outer peripheral surface (404a) of the panel extension portion (404), thereby forming a clearance between the ceiling surface (U1) and the outer peripheral surface (404a) of the panel extension portion (404).
  • the movement of the condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1) is restricted.
  • the movement restrictor (60) formed on the outer peripheral surface (404a) of the panel extension portion (404) allows for restricting the movement of the condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1).
  • the penetration of the condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) into the ceiling surface (U1) can be reduced.
  • degradation of the ceiling surface (U1) due to the penetration of the condensed water (W) can be reduced.
  • the outer peripheral surface (404a) of the panel extension portion (404) is formed to substantially vertically extend from the lower surface (404u) of the panel extension portion (404) toward the ceiling surface (U1), thereby reducing the area of the decorative panel (40) as viewed in plan and downsizing the decorative panel (40).
  • the angle of inclination of the outer peripheral surface (404a) of the panel extension portion (404) with respect to the lower surface (404u) of the panel extension portion (404) is steeper, negative pressure tends to be more easily generated forward of the outer peripheral surface (404a) of the panel extension portion (404), and condensation tends to more easily occur on the outer peripheral surface (404a) of the panel extension portion (404).
  • the notch (61) is preferably formed to restrict the flow of air (warm air) into the notch (61).
  • the notch (61) is preferably configured to make it impossible (or difficult) for air to flow into the notch (61).
  • the notch (61) may be formed to have, for example, a notch depth (a horizontal length) of about 1.5 mm and a notch width (a vertical length) of about 0.5 mm.
  • the notch depth (or width) of the notch (61) may be uniform, or may vary, along the entire periphery of the panel extension portion (404).
  • the movement restrictor (60) may be configured as a groove (62) extending along an upper end portion of the outer peripheral surface (404a) of the panel extension portion (404).
  • the groove (62) extends along the entire periphery of the panel extension portion (404). This configuration can also restrict the movement of water (condensed water (W)) from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1), and can also reduce the penetration of condensed water (W) from the outer peripheral surface (404a) of the panel extension portion (404) into the ceiling surface (U1).
  • the groove (62) is preferably formed to restrict the flow of air (warm air) into the groove (62).
  • the groove (62) is preferably configured to make it impossible (or difficult) for air to flow into the groove (62).
  • the groove (62) may be formed to have, for example, a groove depth (a horizontal length) of about 1.5 mm and a groove width (a vertical length) of about 0.5 mm.
  • the groove depth (or width) of the groove (62) may be uniform, or may vary, along the entire periphery of the panel extension portion (404).
  • the movement restrictor (60) may be discontinuously formed along the periphery of the panel extension portion (404).
  • the notch (61) (or the groove (62)) may be partially discontinuous.
  • Such a configuration can also restrict the movement of water (condensed water (W)) from the outer peripheral surface (404a) of the panel extension portion (404) to the ceiling surface (U1).
  • the lower surface (404u) of the panel extension portion (404) is flat, and extends in a horizontal direction to be substantially parallel to the ceiling surface (U1) has been described.
  • the lower surface (404u) of the panel extension portion (404) may be formed to extend while being inclined with respect to the ceiling surface (U1).
  • the lower surface (404u) of the panel extension portion (404) may be formed, for example, so as to be inclined upward and laterally outward from the panel central portion (400).
  • the panel body (41) has the four outlets (402a) surrounding the inlet (401a) has been described.
  • the panel body (41) may have two outlets (402a) facing each other with the inlet (401a) interposed therebetween, or may have a single outlet (402a) adjacent to the inlet (401a).
  • the above-described decorative panel and indoor unit are useful as an air conditioner decorative panel attached to a lower portion of an indoor unit body inserted and installed in an opening of a ceiling, and an indoor unit including the decorative panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
EP14792126.6A 2013-04-30 2014-04-30 Decorative panel for air conditioner, and in-room unit Active EP2993424B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013095087A JP5692280B2 (ja) 2013-04-30 2013-04-30 空気調和機の化粧パネルおよび室内ユニット
PCT/JP2014/002379 WO2014178193A1 (ja) 2013-04-30 2014-04-30 空気調和機の化粧パネルおよび室内ユニット

Publications (3)

Publication Number Publication Date
EP2993424A1 EP2993424A1 (en) 2016-03-09
EP2993424A4 EP2993424A4 (en) 2017-01-04
EP2993424B1 true EP2993424B1 (en) 2019-12-25

Family

ID=51843333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14792126.6A Active EP2993424B1 (en) 2013-04-30 2014-04-30 Decorative panel for air conditioner, and in-room unit

Country Status (4)

Country Link
EP (1) EP2993424B1 (ja)
JP (1) JP5692280B2 (ja)
AU (1) AU2014260997B2 (ja)
WO (1) WO2014178193A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3088814B1 (en) * 2015-01-22 2019-02-27 Mitsubishi Electric Corporation Indoor unit and refrigeration cycle device
KR102249321B1 (ko) * 2017-09-05 2021-05-07 삼성전자주식회사 공기조화기
CN111473423A (zh) * 2020-04-16 2020-07-31 宁波奥克斯电气股份有限公司 一种空调器

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Publication number Priority date Publication date Assignee Title
US2008A (en) * 1841-03-18 Gas-lamp eok conducting gas pkom ah elevated buhner to one below it
JPS6435327A (en) 1987-07-31 1989-02-06 Chino Corp Temperature detecting device
JP3015587B2 (ja) * 1992-05-11 2000-03-06 三洋電機株式会社 空気調和機の制御装置
JP3256056B2 (ja) 1993-11-05 2002-02-12 株式会社日立製作所 空気調和機のスペーサ及び空気調和機
JP3408983B2 (ja) * 1999-01-25 2003-05-19 三菱電機株式会社 天井埋込型空気調和機
US6598413B2 (en) * 1999-01-25 2003-07-29 Mitsubishi Denki Kabushiki Kaisha Ceiling embedded-type air conditioner
JP2001289460A (ja) * 2000-04-05 2001-10-19 Hitachi Ltd 空気調和機用化粧パネル
US6435963B1 (en) * 2000-12-28 2002-08-20 W. Larry Dill Barrier device to surround air delivery structures
EP1589292A1 (en) * 2004-04-23 2005-10-26 Unico Consumer Products Co., Ltd. Ceiling-recessed air treatment apparatus
JP2008057843A (ja) * 2006-08-31 2008-03-13 Fujitsu General Ltd 空気調和機
JP5125149B2 (ja) * 2007-02-28 2013-01-23 ダイキン工業株式会社 空気調和装置の室内ユニット
CN101713572B (zh) * 2008-09-30 2013-11-13 日立空调·家用电器株式会社 空调机

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Also Published As

Publication number Publication date
EP2993424A1 (en) 2016-03-09
WO2014178193A1 (ja) 2014-11-06
EP2993424A4 (en) 2017-01-04
JP5692280B2 (ja) 2015-04-01
AU2014260997B2 (en) 2016-09-29
JP2014215016A (ja) 2014-11-17
AU2014260997A1 (en) 2015-12-17

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