WO2014178176A1 - Indoor unit for air conditioning devices - Google Patents

Indoor unit for air conditioning devices Download PDF

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Publication number
WO2014178176A1
WO2014178176A1 PCT/JP2014/002305 JP2014002305W WO2014178176A1 WO 2014178176 A1 WO2014178176 A1 WO 2014178176A1 JP 2014002305 W JP2014002305 W JP 2014002305W WO 2014178176 A1 WO2014178176 A1 WO 2014178176A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
heat exchanger
indoor
indoor heat
main body
Prior art date
Application number
PCT/JP2014/002305
Other languages
French (fr)
Japanese (ja)
Inventor
遼太 須原
Original Assignee
ダイキン工業株式会社
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 ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to AU2014260980A priority Critical patent/AU2014260980B2/en
Priority to CN201480010394.7A priority patent/CN105008809B/en
Priority to US14/780,448 priority patent/US20160054010A1/en
Priority to ES14791523.5T priority patent/ES2662888T3/en
Priority to EP14791523.5A priority patent/EP2975330B1/en
Publication of WO2014178176A1 publication Critical patent/WO2014178176A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26Refrigerant piping
    • F24F1/32Refrigerant piping for connecting the separate outdoor units to indoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0043Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0043Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0057Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0059Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0059Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0067Indoor units, e.g. fan coil units characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00Evaporators; Condensers
    • F25B39/02Evaporators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/01Geometry problems, e.g. for reducing size
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/18Optimization, e.g. high integration of refrigeration components

Definitions

  • the present invention relates to an indoor unit of an air conditioner, and particularly relates to space saving of piping around an indoor heat exchanger.
  • an air conditioner disclosed in Patent Document 1 is connected to a casing, an indoor fan accommodated in the casing, an indoor heat exchanger arranged to surround the indoor fan, and a gas side communication pipe And a liquid side connection port connected to the liquid communication pipe. That is, the indoor unit is connected to the outdoor unit via the liquid communication pipe and the gas communication pipe.
  • ⁇ A header is provided on the gas side piping, and a flow divider is provided on the liquid side piping.
  • the header has a header body and a plurality of branch pipes branched from the header body and connected to the gas side end of the indoor heat exchanger.
  • the shunt has a shunt main body and a plurality of shunt pipes (capillary tubes) branched from the shunt main body and connected to the liquid side end of the indoor heat exchanger.
  • the refrigerant condensed in the outdoor heat exchanger flows into the liquid side pipe of the indoor unit via the liquid connection pipe.
  • This refrigerant flows into the indoor heat exchanger from the flow divider and exchanges heat with the air conveyed by the indoor fan.
  • the indoor heat exchanger absorbs heat from the indoor air and evaporates.
  • the evaporated refrigerant flows into the gas side pipe from the header and flows out to the gas connection pipe.
  • the refrigerant compressed by the compressor flows into the gas side pipe of the indoor unit via the gas connection pipe.
  • This refrigerant flows into the indoor heat exchanger from the header and exchanges heat with the air conveyed by the indoor fan.
  • the indoor heat exchanger the refrigerant dissipates heat to the indoor air and condenses.
  • the condensed refrigerant flows into the liquid side pipe from the flow divider and flows out to the liquid connection pipe.
  • the present invention has been made in view of such a point, and an object thereof is to provide an indoor unit of an air conditioner that can reduce the installation space of the liquid side piping and the gas side piping.
  • the first invention includes an indoor fan (27), an indoor heat exchanger (32) arranged so as to surround the indoor fan (27), the indoor heat exchanger (32) and a gas communication pipe ( 3) a gas side pipe (70) that connects to the indoor heat exchanger (32) and a liquid side pipe (80) that connects the liquid communication pipe (2), and the room of the air conditioner installed on the ceiling Targeting the unit, the gas side pipe (70) is opposed to the header body (71a) and a header body (71a) extending vertically along the side end (32a) of the indoor heat exchanger (32).
  • a curved pipe part (73) connecting the lower end part of the header body (71a) and the lower end part of the vertical pipe part (74), and the liquid side pipe (80 ) Is disposed in a space (S1) between the header body (71a), the vertical pipe part (74), and the curved pipe part (73).
  • the lower end portion of the header main body (71a) and the lower end portion of the vertical pipe portion (74) facing the header main body (71a) are provided with a curved pipe portion (73 ).
  • a space (S1) is formed between the header body (71a), the vertical pipe part (74), and the curved pipe part (73).
  • a part of the liquid side pipe (80) is disposed in this space (S1). As a result, the space required for installing the liquid side pipe (80) is reduced.
  • a second invention is characterized in that, in the first invention, an expansion valve (39) disposed inside the indoor heat exchanger (32) is connected to the liquid side pipe (80). To do.
  • the expansion valve (39) is arranged inside the indoor heat exchanger (32). Therefore, the expansion valve (39) can be easily maintained from the indoor fan (27) side (for example, the suction port side).
  • the liquid side pipe (80) includes a flow distributor body (81a) disposed outside the indoor heat exchanger (32), and the flow distributor body (81a). And a liquid relay pipe (82) connecting the expansion valve (39), and the liquid relay pipe (82) intersects with the curved pipe portion (73) of the gas side pipe (70). It is arranged above the curved pipe part (73).
  • the expansion valve (39) is arranged inside the indoor heat exchanger (32), while the flow divider body (81a) is arranged outside the indoor heat exchanger (32). For this reason, the expansion valve (39) and the flow divider main body (81a) do not interfere with each other, and the space inside and outside the indoor heat exchanger (32) can be secured in a well-balanced manner.
  • the flow divider body (81a) is arranged outside the indoor heat exchanger (32) and the expansion valve (39) is arranged inside the indoor heat exchanger (32)
  • the liquid relay pipe connecting them (82) installation space is required.
  • the liquid relay pipe (82) is disposed above the curved pipe portion (73) of the gas side pipe (70), the pipe space is prevented from becoming large in the horizontal direction. it can.
  • a part of the liquid side pipe (80) is disposed in the space between the header body (71a), the vertical pipe part (74), and the curved pipe part (73) of the gas side pipe (70).
  • the expansion valve (39) connected to the liquid side pipe (80) is arranged inside the indoor heat exchanger (32). For this reason, the expansion valve (39) can be easily maintained from the indoor fan (27) (suction grill) side.
  • the expansion valve (39) is disposed inside the indoor heat exchanger (32), and the flow divider main body (81a) is disposed outside the indoor heat exchanger (32). . Therefore, according to the third invention, for example, the indoor heat exchanger (32) is compared with the case where the expansion valve (39) and the flow divider main body (81a) are arranged inside the indoor heat exchanger (32). The space inside is widened. Therefore, a sufficient installation space for the indoor fan (27) can be secured inside the indoor heat exchanger (32).
  • the expansion valve (39) and the flow divider main body (81a) of the indoor heat exchanger (32) are compared with the case where the expansion valve (39) and the flow divider main body (81a) are arranged outside the indoor heat exchanger (32).
  • the outside space becomes wider. Therefore, the casing that houses the indoor heat exchanger (32) can be reduced in the horizontal direction, and the indoor unit can be downsized.
  • the liquid relay pipe (82) that connects the expansion valve (39) and the flow divider main body (81a) in the liquid side pipe (80) is disposed above the curved pipe section (73). ing. For this reason, the horizontal installation space of the liquid relay pipe (82) is reduced, and the indoor unit can be further miniaturized.
  • FIG. 1 is a schematic piping system diagram showing a configuration of a refrigerant circuit of an air conditioner according to an embodiment.
  • FIG. 2 is a perspective view illustrating an appearance of the indoor unit according to the embodiment.
  • FIG. 3 is a longitudinal sectional view showing the internal structure of the indoor unit according to the embodiment.
  • FIG. 4 is a plan view of the interior of the indoor unit according to the embodiment as viewed from the top plate side.
  • FIG. 5 is a first perspective view illustrating a gas side pipe and a liquid side pipe according to the embodiment and peripheral structures thereof.
  • FIG. 6 is a plan view showing a gas side pipe and a liquid side pipe according to the embodiment and peripheral structures thereof.
  • FIG. 7 is a second perspective view showing a gas side pipe and a liquid side pipe and their peripheral structures according to the embodiment.
  • the embodiment of the present invention is an air conditioner (10) that performs indoor cooling and heating.
  • the air conditioner (10) includes an outdoor unit (11) installed outdoors and an indoor unit (20) installed indoors.
  • the outdoor unit (11) and the indoor unit (20) are connected to each other by two connecting pipes (2, 3).
  • a refrigerant circuit (C) is comprised in an air conditioner (10).
  • a vapor compression refrigeration cycle is performed by circulating the filled refrigerant.
  • the outdoor unit (11) is provided with a compressor (12), an outdoor heat exchanger (13), an outdoor expansion valve (14), and a four-way switching valve (15).
  • the compressor (12) compresses the low-pressure refrigerant and discharges the compressed high-pressure refrigerant.
  • a compression mechanism such as a scroll type or a rotary type is driven by the compressor motor (12a).
  • the rotation speed (operation frequency) of the compressor motor (12a) is variable by an inverter device.
  • the outdoor heat exchanger (13) is a fin-and-tube heat exchanger.
  • An outdoor fan (16) is installed in the vicinity of the outdoor heat exchanger (13). In the outdoor heat exchanger (13), the air conveyed by the outdoor fan (16) and the refrigerant exchange heat.
  • the outdoor fan (16) is constituted by a propeller fan driven by an outdoor fan motor (16a).
  • the outdoor fan motor (16a) is configured such that its rotational speed is variable by an inverter device.
  • the outdoor expansion valve (14) is an electronic expansion valve with a variable opening.
  • the four-way switching valve (15) has first to fourth ports.
  • the first port is connected to the discharge side of the compressor (12)
  • the second port is connected to the suction side of the compressor (12)
  • the third port is the outdoor heat exchanger (13 )
  • the fourth port is connected to the gas-side stop valve (5).
  • the four-way selector valve (15) switches between a first state (state indicated by a solid line in FIG. 1) and a second state (state indicated by a broken line in FIG. 1).
  • the first port communicates with the third port
  • the second port communicates with the fourth port.
  • the four-way selector valve (15) in the second state the first port communicates with the fourth port and the second port communicates with the third port.
  • the two communication pipes consist of a liquid communication pipe (2) and a gas communication pipe (3).
  • One end of the liquid communication pipe (2) is connected to the liquid side closing valve (4), and the other end is connected to the liquid side end of the indoor heat exchanger (32).
  • One end of the gas communication pipe (3) is connected to the gas side shut-off valve (5), and the other end is connected to the gas side end of the indoor heat exchanger (32).
  • the indoor unit (20) is provided with an indoor heat exchanger (32) and an indoor expansion valve (39).
  • the indoor heat exchanger (32) is a fin-and-tube heat exchanger.
  • An indoor fan (27) is installed in the vicinity of the indoor heat exchanger (32).
  • the indoor fan (27) is a centrifugal blower driven by an indoor fan motor (27a).
  • the indoor fan motor (27a) is configured to have a variable rotational speed by an inverter device.
  • the indoor expansion valve (39) is connected to the liquid end side of the indoor heat exchanger (32) in the refrigerant circuit (C).
  • the indoor expansion valve (39) is an electronic expansion valve having a variable opening.
  • the indoor unit (20) of the air conditioner (10) is configured to be embedded in the ceiling. That is, as shown in FIG. 3, the indoor unit (20) is fitted and attached to the opening (O) of the ceiling (U) facing the indoor space (R).
  • the indoor unit (20) has an indoor unit main body (21) and a decorative panel (40) attached to the lower part of the indoor unit main body (21).
  • the indoor unit body (21) has a box-shaped casing (22) having a substantially rectangular parallelepiped shape.
  • the casing (22) has a substantially square top plate (23) in plan view and four substantially rectangular side plates (24) extending downward from the peripheral edge of the top plate (23), and the bottom surface An opening is formed in the.
  • a vertically long box-shaped electrical component box (25) is attached to one side plate (24a) of the four side plates (24).
  • a liquid side connection pipe (6) and a gas side connection pipe (7) connected to the indoor heat exchanger (32) pass through the side plate (24a).
  • a liquid communication pipe (2) is connected to the liquid side connection pipe (6), and a gas communication pipe (3) is connected to the gas side connection pipe (7).
  • an indoor fan (27), a bell mouth (31), an indoor heat exchanger (32), and a drain pan (36) are accommodated.
  • the indoor fan (27) is disposed in the center of the casing (22).
  • the indoor fan (27) includes an indoor fan motor (27a), a hub (28), a shroud (29), and an impeller (30).
  • the indoor fan motor (27a) is supported by the top plate (23) of the casing (22).
  • the hub (28) is fixed to the lower end of the drive shaft (27b) that is rotationally driven by the indoor fan motor (27a).
  • the hub (28) includes an annular base (28a) formed radially outward of the indoor fan motor (27a), and a central bulge (28b) bulging downward from the inner peripheral edge of the base (28a). ).
  • the shroud (29) is disposed below the base (28a) so as to face the base (28a) of the hub (28).
  • a circular central suction port (29a) communicating with the inside of the bell mouth (31) is formed in the lower portion of the shroud (29).
  • the impeller (30) is disposed in a blade accommodating space (29b) between the hub (28) and the shroud (29).
  • the impeller (30) is composed of a plurality of turbo blades (30a) arranged so as to be along the rotation direction of the drive shaft (27b).
  • the bell mouth (31) is located below the indoor fan (27).
  • the bell mouth (31) has a circular opening at the upper end and the lower end, respectively, and is formed in a cylindrical shape whose opening area increases toward the decorative panel (40).
  • the internal space (31a) of the bell mouth (31) communicates with the blade housing space (29b) of the indoor fan (27).
  • the indoor heat exchanger (32) is provided with a refrigerant pipe (heat transfer tube) bent so as to surround the indoor fan (27).
  • the indoor heat exchanger (32) is installed on the upper surface of the drain pan (36) so as to stand up.
  • the air blown to the side from the indoor fan (27) passes through the indoor heat exchanger (32).
  • the indoor heat exchanger (32) constitutes an evaporator that cools the air during the cooling operation, and constitutes a condenser (heat radiator) that heats the air during the heating operation.
  • a drain pan (36) is disposed below the indoor heat exchanger (32).
  • the drain pan (36) has an inner wall part (36a), an outer wall part (36b), and a water receiving part (36c).
  • the inner wall portion (36a) is formed along the inner peripheral edge portion of the indoor heat exchanger (32), and is configured by an annular vertical wall standing upward.
  • the outer wall portion (36b) is formed along the four side plates (24) of the casing (22), and is configured by an annular vertical wall that stands upward.
  • the water receiving part (36c) is formed between the inner wall part (36a) and the outer wall part (36b), and is constituted by a groove for collecting condensed water generated in the indoor heat exchanger (32).
  • each main body side blowing channel (37) each extending along the four side plates (24) are formed through the top and bottom of the outer wall (36b) of the drain pan (36).
  • Each main body side blowing channel (37) communicates the space on the downstream side of the indoor heat exchanger (32) with the four panel side blowing channels (43) of the decorative panel (40).
  • the indoor unit main body (21) is provided with a main body side heat insulating member (38).
  • the main body side heat insulating member (38) is formed in a substantially box shape whose lower side is opened.
  • the main body side heat insulating member (38) is formed along the top plate side heat insulating portion (38a) formed along the top plate (23) of the casing (22) and the side plate (24) of the casing (22).
  • a circular through hole (38c) through which the upper end of the indoor fan motor (27a) passes is formed at the center of the top plate heat insulating part (38a).
  • the side plate side heat insulating part (38b) is installed in the outer part of the main body side outlet channel (37) in the outer wall part (36b) of the drain pan (36).
  • the decorative panel (40) is attached to the lower surface of the casing (22).
  • the decorative panel (40) includes a panel body (41) and a suction grill (60).
  • the panel body (41) is formed in a rectangular frame shape in plan view.
  • the panel body (41) is formed with one panel side suction channel (42) and four panel side outlet channels (43).
  • the panel-side suction channel (42) is formed at the center of the panel body (41).
  • a suction port (42a) facing the indoor space (R) is formed at the lower end of the panel-side suction flow path (42).
  • the panel-side suction channel (42) allows the suction port (42a) to communicate with the internal space (31a) of the bell mouth (31).
  • a frame-like inner panel member (44) is fitted in the panel-side suction flow path (42).
  • a dust collection filter (45) that captures dust in the air sucked from the suction port (42a) is provided inside the panel-side suction flow path (42).
  • Each panel side outlet channel (43) is formed outside the panel side inlet channel (42) so as to surround the panel side inlet channel (42).
  • Each panel side blowing channel (43) extends along four sides of each panel side suction channel (42). Air outlets (43a) facing the indoor space (R) are formed at the lower ends of the panel-side outlet channels (43), respectively.
  • Each panel side blowing flow path (43) makes the corresponding blower outlet (43a) and the corresponding main body side blowing flow path (37) communicate.
  • an inner heat insulating part (46) is provided inside the panel side blowing channel (43) (on the center part side of the panel body (41)).
  • the outer side heat insulation part (47) is provided in the outer side (outer edge part side of a panel main body (41)) of the panel side blowing flow path (43).
  • An inner seal member (48) interposed between the panel main body (41) and the drain pan (36) is provided on the upper surfaces of the inner heat insulating portion (46) and the outer heat insulating portion (47).
  • the outer panel member (49) is fitted into the inner edge of the outer heat insulating portion (47).
  • the outer panel member (49) has an inner wall portion (50) that constitutes an inner wall surface of the main body side outlet channel (37), and a lower end portion of the inner wall portion (50) toward an outer edge portion of the panel main body (41). And an extending portion (51) extending.
  • the extension part (51) is formed in a rectangular frame shape along the lower surface of the ceiling (U).
  • An outer seal member (52) interposed between the extension part (51) and the ceiling (U) is provided on the upper surface of the extension part (51).
  • each body side blowing passage (37) is provided with a wind direction adjusting blade (53) for adjusting the wind direction of the air (blowing air) flowing through the body side blowing passage (37).
  • the wind direction adjusting blade (53) is formed across both ends in the longitudinal direction of the main body outlet channel (37) along the side plate (24) of the casing (22).
  • the wind direction adjusting blade (53) is configured to be rotatable about an axis of rotation (53a) extending in the longitudinal direction.
  • the suction grill (60) is attached to the lower end (that is, the suction port (42a)) of the panel side suction flow path (42).
  • the suction grill (60) includes a grill main body (61) facing the suction inlet (42a) and a rectangular extension (65 extending outward from the grill main body (61) toward each outlet (43a). ).
  • the grill body (61) is formed in a substantially square shape in plan view.
  • a large number of suction holes (63) are arranged in a lattice pattern at the center of the grill body (61). These suction holes (63) are constituted by through holes that penetrate the grill body (61) in the thickness direction (vertical direction).
  • the suction hole (63) is formed in a square shape in the opening cross section.
  • the extension portion (65) of the suction grill (60) is formed in a rectangular frame shape extending outward from the grill body (61) toward the outlet (43a).
  • the extension part (65) overlaps with the panel body (41) in the vertical direction so as to overlap the lower surface of the inner heat insulating part (46).
  • the side edge part of the extension part (65) has shifted to the suction inlet (42a) rather than the inner edge part of the blower outlet (43a).
  • the four-way switching valve (15) shown in FIG. 1 is in a state indicated by a solid line, and the compressor (12), the indoor fan (27), and the outdoor fan (16) are in an operating state.
  • the refrigerant circuit (C) a refrigeration cycle is performed in which the outdoor heat exchanger (13) serves as a condenser and the indoor heat exchanger (32) serves as an evaporator.
  • the high-pressure refrigerant compressed by the compressor (12) flows through the outdoor heat exchanger (13) and exchanges heat with outdoor air.
  • the outdoor heat exchanger (13) the high-pressure refrigerant dissipates heat to the outdoor air and condenses.
  • the refrigerant condensed in the outdoor heat exchanger (13) is sent to the indoor unit (20).
  • the refrigerant flows through the indoor heat exchanger (32) after being decompressed by the indoor expansion valve (39).
  • room air flows upward in order through the suction port (42a), the panel-side suction flow path (42), and the internal space (31a) of the bell mouth (31), and accommodates the blades of the indoor fan (27). It is sucked into the space (29b).
  • the air in the blade accommodating space (29b) is conveyed by the impeller (30) and blown out radially between the hub (28) and the shroud (29).
  • This air passes through the indoor heat exchanger (32) and exchanges heat with the refrigerant.
  • the refrigerant absorbs heat from the indoor air and evaporates, and the air is cooled by the refrigerant.
  • the air cooled by the indoor heat exchanger (32) is diverted to each main body side outlet passage (37), then flows downward through the panel side outlet passage (43), and passes through the outlet (43a) to the indoor space ( To R).
  • the refrigerant evaporated in the indoor heat exchanger (32) is sucked into the compressor (12) and compressed again. .
  • the four-way switching valve (15) shown in FIG. 1 is in a state indicated by a broken line, and the compressor (12), the indoor fan (27), and the outdoor fan (16) are in an operating state.
  • the refrigerant circuit (C) a refrigeration cycle is performed in which the indoor heat exchanger (32) serves as a condenser and the outdoor heat exchanger (13) serves as an evaporator.
  • the high-pressure refrigerant compressed by the compressor (12) flows through the indoor heat exchanger (32) of the indoor unit (20).
  • room air flows upward in order through the suction port (42a), the panel-side suction flow path (42), and the internal space (31a) of the bell mouth (31), and accommodates the blades of the indoor fan (27). It is sucked into the space (29b).
  • the air in the blade accommodating space (29b) is conveyed by the impeller (30) and blown out radially between the hub (28) and the shroud (29). This air passes through the indoor heat exchanger (32) and exchanges heat with the refrigerant.
  • the refrigerant dissipates heat to the indoor air and condenses, and the air is heated by the refrigerant.
  • the air heated by the indoor heat exchanger (32) is diverted to each main body-side outlet passage (37), then flows downward through the panel-side outlet passage (43), and passes through the outlet (43a) to the indoor space ( To R).
  • the refrigerant condensed in the indoor heat exchanger (32) is depressurized by the outdoor expansion valve (14) and then flows through the outdoor heat exchanger (13).
  • the outdoor heat exchanger (13) the refrigerant absorbs heat from the outdoor air and evaporates.
  • the refrigerant evaporated in the outdoor heat exchanger (13) is sucked into the compressor (12) and compressed again.
  • the first end (32a) and the second end (32b) are formed in the indoor heat exchanger (32).
  • the first side end (32a) is formed at one side end in the longitudinal direction of the heat transfer tube of the indoor heat exchanger (32), and the second side end (32b) is formed at the indoor heat exchanger (32). It is formed at the other side end in the longitudinal direction of the heat transfer tube.
  • the gas side pipe (70) and the liquid side pipe (80) are connected to the pipe housing space (S) between the first side end (32a) and the second side end (32b) of the indoor heat exchanger (32). Installed.
  • the gas side pipe (70) is formed between the gas side end of the indoor heat exchanger (32) and the gas side connection pipe (7) described above.
  • the gas side pipe (70) includes a header (71) connected to the indoor heat exchanger (32), and a gas relay pipe (72) connected between the header (71) and the gas side connection pipe (7). And have.
  • the header (71) is disposed in the vicinity of the first side end (32a) of the indoor heat exchanger (32).
  • the header (71) includes a header body (71a) and a plurality of branch pipes (71b) branching from the header body (71a).
  • the header body (71a) extends in the vertical direction along the first side end (32a) of the indoor heat exchanger (32). That is, the header main body (71a) is parallel to the first side end (32a) so as to be spaced from the first side end (32a) of the indoor heat exchanger (32).
  • the header body (71a) joins the refrigerant that has flowed out of the branch pipes (71b) during cooling.
  • the header body (71a) diverts the refrigerant that has flowed out of the gas relay pipe (72) to each branch pipe (71b) during heating.
  • the plurality of branch pipes (71b) are disposed between the header body (71a) and the first side end (32a) of the indoor heat exchanger (32).
  • Each branch pipe (71b) is arranged in a direction (vertical direction) along the side surface of the header body (71a) so as to be parallel to each other.
  • One end of each branch pipe (71b) is connected to each heat transfer pipe of the first side end (32a) of the indoor heat exchanger (32). That is, the header (71) is connected to the heat transfer tube of the first side end (32a) among the side ends on both sides of the indoor heat exchanger (32).
  • the other end of each branch pipe (71b) is connected to the header body (71a) and communicates with the inside of the header body (71a).
  • the gas relay pipe (72) has a first curved pipe section (73) (curved pipe section) and a first vertical pipe section (74) (vertical) in order from the header body (71a) to the gas side connection pipe (7). Tube portion) and the first horizontal tube portion (75) are continuously formed.
  • the first curved pipe portion (73) has a substantially U-shaped outer shape whose upper side is opened in a side view.
  • the 1st curved pipe part (73) has connected the lower end part of the header main body (71a), and the lower end part of the 1st vertical pipe part (74).
  • the first vertical pipe portion (74) extends in the vertical direction so as to face the lower side surface of the header body (71a).
  • the 1st vertical pipe part (74) has connected the 1st curved pipe part (73) and the 1st horizontal pipe part (75).
  • the 1st horizontal pipe part (75) is bent in the horizontal direction from the upper end part of the 1st vertical pipe part (74), and is connected with the gas side connection pipe (7).
  • a vertically long space (S1) is formed between the header body (71a), the first curved pipe part (73), and the first vertical pipe part (74).
  • the liquid side pipe (80) is formed between the liquid side end of the indoor heat exchanger (32) and the liquid side connecting pipe (6) described above.
  • the liquid side pipe (80) includes a flow divider (81) and a liquid relay pipe (82) connected between the flow divider (81) and the liquid side connection pipe (6).
  • the flow divider (81) is disposed in the vicinity of the first side end (32a) of the indoor heat exchanger (32).
  • the shunt (81) has a shunt main body (81a) and a plurality of shunt pipes (81b) branched from the shunt main body (81a).
  • the shunt main body (81a) is arranged outside the indoor heat exchanger (32). Specifically, when the virtual plane along the downstream surface near the first side end (32a) of the indoor heat exchanger (32) is P1 (see FIG. 6), the shunt main body (81a) It arrange
  • the flow distributor main body (81a) is formed in a bottomed cylindrical shape whose axial center extends vertically, and a plurality of flow dividing tubes (81b) are connected to the upper end surface thereof.
  • the flow divider main body (81a) diverts the refrigerant that has flowed out of the liquid relay pipe (82) to each of the diversion pipes (81b) during cooling.
  • the flow divider main body (81a) joins the refrigerant that has flowed out of each flow dividing pipe (81b) during heating.
  • the plurality of flow dividing tubes (81b) are disposed between the flow divider main body (81a) and the first side end (32a) of the indoor heat exchanger (32).
  • Each branch pipe (81b) is constituted by a capillary tube having a smaller flow path diameter than the flow distributor body (81a).
  • the liquid relay pipe (82) has a second vertical pipe section (83), a second curved pipe section (84), and a third vertical pipe section in order from the flow distributor main body (81a) toward the liquid side connection pipe (6). (85), second horizontal pipe part (86), third horizontal pipe part (87), fourth vertical pipe part (88), fourth horizontal pipe part (89), fifth vertical pipe part (90), and A 5th horizontal pipe part (91) is comprised continuously.
  • the second vertical pipe portion (83) extends downward from the lower end portion of the shunt main body (81a).
  • the second curved pipe portion (84) has a substantially U-shaped outer shape whose upper side is open.
  • the 2nd curved pipe part (84) has connected the lower end part of the 2nd vertical pipe part (83), and the lower end part of the 3rd vertical pipe part (85).
  • a first filter (95) that captures foreign matters in the refrigerant flowing inside is connected to the third vertical pipe portion (85).
  • the first filter (95) is disposed outside the indoor heat exchanger (32) in the same manner as the flow divider body (81a).
  • the second horizontal pipe (86) extends in the horizontal direction from the upper end of the third vertical pipe (85) toward the indoor fan (27).
  • the second horizontal pipe portion (86) is formed from the outside of the indoor heat exchanger (32) to the inside of the indoor heat exchanger (32).
  • the second horizontal pipe portion (86) is disposed on the upper side of the first curved pipe portion (73) so as to intersect the first curved pipe portion (73) of the gas side pipe (70).
  • the indoor expansion valve (39) described above is connected to the inner end of the second horizontal pipe (86).
  • the indoor expansion valve (39) is disposed inside the indoor heat exchanger (32). Specifically, if the virtual plane along the upstream surface near the first side end (32a) of the indoor heat exchanger (32) is P2 (see FIG. 6), the indoor expansion valve (39) Arranged closer to the axis of the indoor fan (27) than the virtual plane P2.
  • the third horizontal pipe portion (87) extends in the horizontal direction from the lower end portion of the indoor expansion valve (39) toward the casing (22).
  • the fourth vertical pipe portion (88) extends in the vertical direction along the header (71) and the first vertical pipe portion (74).
  • the fourth vertical pipe (88) is disposed in the space (S) between the header (71), the first curved pipe (73), and the first vertical pipe (74) of the gas side pipe (70). Is done.
  • the fourth horizontal pipe part (89) is bent from the lower end part of the fourth vertical pipe part (88) and extends in the horizontal direction.
  • the fifth vertical pipe portion (90) is bent upward from the inner end of the fourth vertical pipe portion (88) and extends in the vertical direction.
  • the 5th vertical pipe part (90) is connected with the 2nd filter (97) which catches the foreign material in the refrigerant which flows through the inside.
  • the second filter (97) is disposed inside the indoor heat exchanger (32) in the same manner as the indoor expansion valve (39).
  • the fifth horizontal pipe (91) is bent in the horizontal direction from the upper end of the fourth vertical pipe (88) and connected to the liquid side connection pipe (6).
  • a part of the liquid relay pipe (82) is vertically long between the header (71) of the gas side pipe (70), the first curved pipe part (73), and the first vertical pipe part (74).
  • the space (S1) Specifically, in the present embodiment, the outer end portion of the third horizontal pipe portion (87) of the liquid relay pipe (82), the fourth vertical pipe portion (88), and the inner side of the fourth horizontal pipe portion (89). The end is disposed inside the space (S1). For this reason, the installation space of the pipe of the liquid relay pipe (82) can be reduced without the gas side pipe (70) and the liquid side pipe (80) interfering with each other.
  • the indoor expansion valve (39) is disposed inside the indoor heat exchanger (32).
  • the flow divider (81) is disposed outside the indoor heat exchanger (32). If the shunt (81) is placed inside the indoor heat exchanger (32) together with the indoor expansion valve (39), the space inside the indoor heat exchanger (32) is reduced, and the installation space for the indoor fan (27) is reduced. There is a possibility that it cannot be secured sufficiently.
  • the installation space for the indoor fan (27) can be secured by disposing the shunt main body (81a) outside the indoor heat exchanger (32).
  • a part of the liquid relay pipe (82) that connects the indoor expansion valve (39) and the flow divider main body (81a) (that is, the second horizontal pipe portion (86)) is U-shaped.
  • the first curved pipe portion (73) is disposed on the upper side. For this reason, the installation space of the horizontal direction of a 2nd horizontal pipe part (86) also becomes small.
  • the liquid side pipe (70) is formed in the space (S1) between the header body (71a), the first vertical pipe part (74), and the first curved pipe part (73) of the gas side pipe (70).
  • the installation space of the liquid side pipe (80) can be reduced, and the indoor unit (20) can be downsized.
  • the indoor expansion valve (39) is arranged inside the indoor heat exchanger (32), the indoor expansion valve (39) can be easily maintained from the indoor fan (27) (suction grill (60)) side. be able to. Further, the indoor expansion valve (39) is arranged inside the indoor heat exchanger (32), and the flow divider main body (81a) is arranged outside the indoor heat exchanger (32). For this reason, the installation space inside the indoor heat exchanger (32) and the installation space outside can be secured with good balance. Moreover, in this embodiment, piping (2nd horizontal pipe part (86)) which connects an indoor expansion valve (39) and a flow divider main body (81a) is arrange
  • the indoor unit (20) of the air conditioner (1) is configured to be embedded in a ceiling that is fitted into the opening (O) of the ceiling (U).
  • the indoor unit (20) may be configured to be suspended from the ceiling and suspended from the ceiling disposed in the indoor space (R).
  • the present invention is useful for space saving of piping around an indoor heat exchanger in an indoor unit of an air conditioner.
  • Liquid communication pipe 3 Liquid communication pipe 3 Gas communication pipe 10 Air conditioner 20 Indoor unit 27 Indoor fan 32 Indoor heat exchanger 32a First side end (side end) 39 Indoor expansion valve (expansion valve) 70 Gas side piping 71a Header main body 73 1st curved pipe part (curved pipe part) 74 First vertical pipe (vertical pipe) 80 Liquid side pipe 81a Flow divider body 82 Liquid relay pipe

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Abstract

An indoor unit for air conditioning devices, having provided in gas-side piping (70): a header main body (71a) extending vertically along a side end section (32a) of an indoor heat exchanger (32); a vertical pipe section (74) facing the header main body (71a); and a bent pipe section (73) connecting a bottom end section of the header main body (71a) and a bottom end section of the vertical pipe section (74). Some fluid-side piping (80) is arranged in a space (S1) between the header main body (71a), the vertical pipe section (74), and the bent pipe section (73). As a result of the present invention, the installation space for the fluid-side piping (80) can be reduced, and consequently the indoor unit can be more compact, as a result of some fluid-side piping (80) being arranged in the space between the header main body (71a), the vertical pipe section (74), and the bent pipe section (73) of the gas-side piping (70).

Description

空気調和機の室内ユニットAir conditioner indoor unit
  本発明は、空気調和機の室内ユニットに関し、特に室内熱交換器の周辺の配管の省スペース化に係るものである。 The present invention relates to an indoor unit of an air conditioner, and particularly relates to space saving of piping around an indoor heat exchanger.
  従来より、室内の冷房や暖房を行う空気調和機が知られている。例えば特許文献1に開示の空気調和機は、ケーシングと、該ケーシングに収容される室内ファンと、該室内ファンの周囲を取り囲むように配設される室内熱交換器と、ガス側連絡配管に接続するガス側接続ポートと、液連絡配管に接続する液側接続ポートとを有している。つまり、室内ユニットは、液連絡配管及びガス連絡配管を経由して室外ユニットと接続されている。 Conventionally, air conditioners that cool and heat indoors are known. For example, an air conditioner disclosed in Patent Document 1 is connected to a casing, an indoor fan accommodated in the casing, an indoor heat exchanger arranged to surround the indoor fan, and a gas side communication pipe And a liquid side connection port connected to the liquid communication pipe. That is, the indoor unit is connected to the outdoor unit via the liquid communication pipe and the gas communication pipe.
  ガス側配管にはヘッダが設けられ、液側配管には分流器が設けられる。ヘッダは、ヘッダ本体と、ヘッダ本体から分岐し室内熱交換器のガス側端部に接続する複数の分岐管とを有している。また、分流器は、分流器本体と、該分流器本体から分岐し室内熱交換器の液側端部に接続する複数の分流管(キャピラリーチューブ)とを有している。 ¡A header is provided on the gas side piping, and a flow divider is provided on the liquid side piping. The header has a header body and a plurality of branch pipes branched from the header body and connected to the gas side end of the indoor heat exchanger. The shunt has a shunt main body and a plurality of shunt pipes (capillary tubes) branched from the shunt main body and connected to the liquid side end of the indoor heat exchanger.
  空気調和機の冷房運転時には、室外熱交換器で凝縮した後の冷媒が、液連絡配管を経由して、室内ユニットの液側配管へ流入する。この冷媒は、分流器より室内熱交換器に流入し、室内ファンが搬送する空気と熱交換する。この結果、室内熱交換器では、冷媒が室内空気から吸熱して蒸発する。蒸発した冷媒は、ヘッダよりガス側配管に流入し、ガス連絡配管へ流出する。 During cooling operation of the air conditioner, the refrigerant condensed in the outdoor heat exchanger flows into the liquid side pipe of the indoor unit via the liquid connection pipe. This refrigerant flows into the indoor heat exchanger from the flow divider and exchanges heat with the air conveyed by the indoor fan. As a result, in the indoor heat exchanger, the refrigerant absorbs heat from the indoor air and evaporates. The evaporated refrigerant flows into the gas side pipe from the header and flows out to the gas connection pipe.
  また、空気調和機の暖房運転時には、圧縮機で圧縮された冷媒が、ガス連絡配管を経由して、室内ユニットのガス側配管へ流入する。この冷媒は、ヘッダより室内熱交換器に流入し、室内ファンが搬送する空気と熱交換する。この結果、室内熱交換器では、冷媒が室内空気へ放熱して凝縮する。凝縮した冷媒は、分流器より液側配管に流入し、液連絡配管へ流出する。 In addition, during the heating operation of the air conditioner, the refrigerant compressed by the compressor flows into the gas side pipe of the indoor unit via the gas connection pipe. This refrigerant flows into the indoor heat exchanger from the header and exchanges heat with the air conveyed by the indoor fan. As a result, in the indoor heat exchanger, the refrigerant dissipates heat to the indoor air and condenses. The condensed refrigerant flows into the liquid side pipe from the flow divider and flows out to the liquid connection pipe.
特開2011-163741号公報JP 2011-163741 A
  上述のように空気調和機の室内ユニットでは、ケーシングの内部に室内熱交換器と各連絡配管とを接続する配管(液側配管及びガス側配管)を配設する必要がある。このため、液側配管やガス側配管を他の機器と干渉しないように配設しようとすると、配管の設置に要するスペースが上下方向あるいは水平方向に広くなってしまい、室内ユニットの大型化を招いてしまうという問題があった。 As described above, in an indoor unit of an air conditioner, it is necessary to arrange pipes (liquid side pipes and gas side pipes) that connect the indoor heat exchanger and each connection pipe inside the casing. For this reason, if the liquid side pipe and the gas side pipe are arranged so as not to interfere with other equipment, the space required for the installation of the pipe becomes wide in the vertical direction or the horizontal direction, resulting in an increase in the size of the indoor unit. There was a problem of being over.
  本発明は、かかる点に鑑みてなされたものであり、その目的は、液側配管及びガス側配管の設置スペースを低減できる空気調和機の室内ユニットを提供することである。 The present invention has been made in view of such a point, and an object thereof is to provide an indoor unit of an air conditioner that can reduce the installation space of the liquid side piping and the gas side piping.
  第1の発明は、室内ファン(27)と、該室内ファン(27)の周囲を囲むように配置された室内熱交換器(32)と、該室内熱交換器(32)とガス連絡配管(3)とを繋ぐガス側配管(70)と、該室内熱交換器(32)と液連絡配管(2)とを繋ぐ液側配管(80)とを備え、天井に設けられる空気調和機の室内ユニットを対象とし、上記ガス側配管(70)は、上記室内熱交換器(32)の側端部(32a)に沿って上下に延びるヘッダ本体(71a)と、該ヘッダ本体(71a)に対向する縦管部(74)と、上記ヘッダ本体(71a)の下端部と上記縦管部(74)の下端部とを接続する曲管部(73)とを有し、上記液側配管(80)の一部が、上記ヘッダ本体(71a)と上記縦管部(74)と上記曲管部(73)との間の空間(S1)に配設されることを特徴とする。 The first invention includes an indoor fan (27), an indoor heat exchanger (32) arranged so as to surround the indoor fan (27), the indoor heat exchanger (32) and a gas communication pipe ( 3) a gas side pipe (70) that connects to the indoor heat exchanger (32) and a liquid side pipe (80) that connects the liquid communication pipe (2), and the room of the air conditioner installed on the ceiling Targeting the unit, the gas side pipe (70) is opposed to the header body (71a) and a header body (71a) extending vertically along the side end (32a) of the indoor heat exchanger (32). And a curved pipe part (73) connecting the lower end part of the header body (71a) and the lower end part of the vertical pipe part (74), and the liquid side pipe (80 ) Is disposed in a space (S1) between the header body (71a), the vertical pipe part (74), and the curved pipe part (73).
  第1の発明のガス側配管(70)には、ヘッダ本体(71a)の下端部と、該ヘッダ本体(71a)に対向する縦管部(74)の下端部とが、曲管部(73)によって接続される。これにより、ガス側配管(70)では、ヘッダ本体(71a)と縦管部(74)と曲管部(73)との間に空間(S1)が形成される。本発明では、液側配管(80)の一部が、この空間(S1)に配設される。この結果、液側配管(80)の設置に要するスペースが縮小される。 In the gas side pipe (70) of the first invention, the lower end portion of the header main body (71a) and the lower end portion of the vertical pipe portion (74) facing the header main body (71a) are provided with a curved pipe portion (73 ). Thereby, in the gas side pipe (70), a space (S1) is formed between the header body (71a), the vertical pipe part (74), and the curved pipe part (73). In the present invention, a part of the liquid side pipe (80) is disposed in this space (S1). As a result, the space required for installing the liquid side pipe (80) is reduced.
  第2の発明は、第1の発明において、上記液側配管(80)には、上記室内熱交換器(32)の内側に配置される膨張弁(39)が接続されていることを特徴とする。 A second invention is characterized in that, in the first invention, an expansion valve (39) disposed inside the indoor heat exchanger (32) is connected to the liquid side pipe (80). To do.
  第2の発明では、室内熱交換器(32)の内側に膨張弁(39)が配置される。このため、この膨張弁(39)を室内ファン(27)側(例えば吸込口側)から容易にメンテナンスすることができる。 In the second invention, the expansion valve (39) is arranged inside the indoor heat exchanger (32). Therefore, the expansion valve (39) can be easily maintained from the indoor fan (27) side (for example, the suction port side).
  第3の発明は、第2の発明において、上記液側配管(80)には、上記室内熱交換器(32)の外側に配置される分流器本体(81a)と、該分流器本体(81a)と該膨張弁(39)とを繋ぐ液中継管(82)とが接続され、上記液中継管(82)は、上記ガス側配管(70)の曲管部(73)と交差するように該曲管部(73)の上側に配設されることを特徴とする。 According to a third aspect, in the second aspect, the liquid side pipe (80) includes a flow distributor body (81a) disposed outside the indoor heat exchanger (32), and the flow distributor body (81a). And a liquid relay pipe (82) connecting the expansion valve (39), and the liquid relay pipe (82) intersects with the curved pipe portion (73) of the gas side pipe (70). It is arranged above the curved pipe part (73).
  第3の発明では、膨張弁(39)が室内熱交換器(32)の内側に配置される一方、分流器本体(81a)は室内熱交換器(32)の外側に配置される。このため、膨張弁(39)と分流器本体(81a)とが互いに干渉することがなく、室内熱交換器(32)の内側及び外側のスペースをバランスよく確保できる。一方、このように分流器本体(81a)を室内熱交換器(32)の外側に配置し、膨張弁(39)を室内熱交換器(32)の内側に配置すると、これらを繋ぐ液中継管(82)の設置スペースが必要となる。しかし、本発明では、この液中継管(82)が、ガス側配管(70)の曲管部(73)の上側に配設されるため、配管スペースが水平方向に大きくなってしまうことを抑制できる。 In the third invention, the expansion valve (39) is arranged inside the indoor heat exchanger (32), while the flow divider body (81a) is arranged outside the indoor heat exchanger (32). For this reason, the expansion valve (39) and the flow divider main body (81a) do not interfere with each other, and the space inside and outside the indoor heat exchanger (32) can be secured in a well-balanced manner. On the other hand, when the flow divider body (81a) is arranged outside the indoor heat exchanger (32) and the expansion valve (39) is arranged inside the indoor heat exchanger (32), the liquid relay pipe connecting them (82) installation space is required. However, in the present invention, since the liquid relay pipe (82) is disposed above the curved pipe portion (73) of the gas side pipe (70), the pipe space is prevented from becoming large in the horizontal direction. it can.
  本発明によれば、ガス側配管(70)のヘッダ本体(71a)と縦管部(74)と曲管部(73)との間の空間に液側配管(80)の一部を配設することで、液側配管(80)の設置スペースを小さくでき、ひいては室内ユニットの小型化を図ることができる。 According to the present invention, a part of the liquid side pipe (80) is disposed in the space between the header body (71a), the vertical pipe part (74), and the curved pipe part (73) of the gas side pipe (70). By doing so, the installation space of the liquid side pipe (80) can be reduced, and as a result, the indoor unit can be downsized.
  また、第2の発明によれば、液側配管(80)に接続される膨張弁(39)を室内熱交換器(32)の内側に配置している。このため、室内ファン(27)(吸込グリル)側から膨張弁(39)を簡便にメンテナンスすることができる。 Further, according to the second invention, the expansion valve (39) connected to the liquid side pipe (80) is arranged inside the indoor heat exchanger (32). For this reason, the expansion valve (39) can be easily maintained from the indoor fan (27) (suction grill) side.
  特に第3の発明によれば、膨張弁(39)を室内熱交換器(32)の内側に配置し、且つ分流器本体(81a)を室内熱交換器(32)の外側に配置している。このため、第3の発明によれば、例えば膨張弁(39)及び分流器本体(81a)を室内熱交換器(32)の内側に配置する場合と比較して、室内熱交換器(32)の内側のスペースが広くなる。従って、室内熱交換器(32)の内側において、室内ファン(27)の設置スペースを十分に確保できる。また、第3の発明によれば、例えば膨張弁(39)及び分流器本体(81a)を室内熱交換器(32)の外側に配置する場合と比較して、室内熱交換器(32)の外側のスペースが広くなる。従って、室内熱交換器(32)を収容するケーシングを水平方向に縮小でき、ひいては室内ユニットの小型化を図ることができる。 Particularly, according to the third invention, the expansion valve (39) is disposed inside the indoor heat exchanger (32), and the flow divider main body (81a) is disposed outside the indoor heat exchanger (32). . Therefore, according to the third invention, for example, the indoor heat exchanger (32) is compared with the case where the expansion valve (39) and the flow divider main body (81a) are arranged inside the indoor heat exchanger (32). The space inside is widened. Therefore, a sufficient installation space for the indoor fan (27) can be secured inside the indoor heat exchanger (32). Further, according to the third invention, for example, the expansion valve (39) and the flow divider main body (81a) of the indoor heat exchanger (32) are compared with the case where the expansion valve (39) and the flow divider main body (81a) are arranged outside the indoor heat exchanger (32). The outside space becomes wider. Therefore, the casing that houses the indoor heat exchanger (32) can be reduced in the horizontal direction, and the indoor unit can be downsized.
  また、第3の発明によれば、液側配管(80)における膨張弁(39)と分流器本体(81a)とを繋ぐ液中継管(82)を曲管部(73)の上側に配置している。このため、液中継管(82)の水平方向の設置スペースが小さくなり、室内ユニットを更に小型化できる。 According to the third aspect of the invention, the liquid relay pipe (82) that connects the expansion valve (39) and the flow divider main body (81a) in the liquid side pipe (80) is disposed above the curved pipe section (73). ing. For this reason, the horizontal installation space of the liquid relay pipe (82) is reduced, and the indoor unit can be further miniaturized.
図1は、実施形態に係る空気調和機の冷媒回路の構成を示す概略の配管系統図である。FIG. 1 is a schematic piping system diagram showing a configuration of a refrigerant circuit of an air conditioner according to an embodiment. 図2は、実施形態に係る室内ユニットの外観を示す斜視図である。FIG. 2 is a perspective view illustrating an appearance of the indoor unit according to the embodiment. 図3は、実施形態に係る室内ユニットの内部構造を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing the internal structure of the indoor unit according to the embodiment. 図4は、実施形態に係る室内ユニットの内部を天板側から視た平面図である。FIG. 4 is a plan view of the interior of the indoor unit according to the embodiment as viewed from the top plate side. 図5は、実施形態に係るガス側配管及び液側配管と、それらの周辺構造を表した第1の斜視図である。FIG. 5 is a first perspective view illustrating a gas side pipe and a liquid side pipe according to the embodiment and peripheral structures thereof. 図6は、実施形態に係るガス側配管及び液側配管と、それらの周辺構造を表した平面図である。FIG. 6 is a plan view showing a gas side pipe and a liquid side pipe according to the embodiment and peripheral structures thereof. 図7は、実施形態に係るガス側配管及び液側配管と、それらの周辺構造を表した第2の斜視図である。FIG. 7 is a second perspective view showing a gas side pipe and a liquid side pipe and their peripheral structures according to the embodiment.
  以下、本発明の実施形態を図面に基づいて詳細に説明する。なお、以下の実施形態は、本質的に好ましい例示であって、本発明、その適用物、あるいはその用途の範囲を制限することを意図するものではない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.
  本発明の実施形態は、室内の冷房及び暖房を行う空気調和機(10)である。図1に示すように、空気調和機(10)は、室外に設置される室外ユニット(11)と、室内に設置される室内ユニット(20)とを有する。室外ユニット(11)と室内ユニット(20)とは、2本の連絡配管(2,3)によって互いに接続される。これにより、空気調和機(10)では、冷媒回路(C)が構成される。冷媒回路(C)では、充填された冷媒が循環することで、蒸気圧縮式の冷凍サイクルが行われる。 The embodiment of the present invention is an air conditioner (10) that performs indoor cooling and heating. As shown in FIG. 1, the air conditioner (10) includes an outdoor unit (11) installed outdoors and an indoor unit (20) installed indoors. The outdoor unit (11) and the indoor unit (20) are connected to each other by two connecting pipes (2, 3). Thereby, a refrigerant circuit (C) is comprised in an air conditioner (10). In the refrigerant circuit (C), a vapor compression refrigeration cycle is performed by circulating the filled refrigerant.
  〈冷媒回路の構成〉
  室外ユニット(11)には、圧縮機(12)、室外熱交換器(13)、室外膨張弁(14)、及び四方切換弁(15)が設けられる。圧縮機(12)は、低圧の冷媒を圧縮し、圧縮後の高圧の冷媒を吐出する。圧縮機(12)では、スクロール式、ロータリ式等の圧縮機構が圧縮機モータ(12a)によって駆動される。圧縮機モータ(12a)は、インバータ装置によって、その回転数(運転周波数)が可変に構成されている。
<Configuration of refrigerant circuit>
The outdoor unit (11) is provided with a compressor (12), an outdoor heat exchanger (13), an outdoor expansion valve (14), and a four-way switching valve (15). The compressor (12) compresses the low-pressure refrigerant and discharges the compressed high-pressure refrigerant. In the compressor (12), a compression mechanism such as a scroll type or a rotary type is driven by the compressor motor (12a). The rotation speed (operation frequency) of the compressor motor (12a) is variable by an inverter device.
  室外熱交換器(13)は、フィン・アンド・チューブ式の熱交換器である。室外熱交換器(13)の近傍には、室外ファン(16)が設置される。室外熱交換器(13)では、室外ファン(16)が搬送する空気と冷媒とが熱交換する。室外ファン(16)は、室外ファンモータ(16a)によって駆動されるプロペラファンによって構成される。室外ファンモータ(16a)は、インバータ装置によって、その回転数が可変に構成される。 The outdoor heat exchanger (13) is a fin-and-tube heat exchanger. An outdoor fan (16) is installed in the vicinity of the outdoor heat exchanger (13). In the outdoor heat exchanger (13), the air conveyed by the outdoor fan (16) and the refrigerant exchange heat. The outdoor fan (16) is constituted by a propeller fan driven by an outdoor fan motor (16a). The outdoor fan motor (16a) is configured such that its rotational speed is variable by an inverter device.
  室外膨張弁(14)は、開度が可変な電子膨張弁で構成される。四方切換弁(15)は、第1から第4までのポートを有している。四方切換弁(15)では、第1ポートが圧縮機(12)の吐出側に接続し、第2ポートが圧縮機(12)の吸入側に接続し、第3ポートが室外熱交換器(13)のガス側端部に接続し、第4ポートがガス側閉鎖弁(5)に接続している。四方切換弁(15)は、第1状態(図1の実線で示す状態)と第2状態(図1の破線で示す状態)とに切り換わる。第1状態の四方切換弁(15)では、第1ポートと第3ポートが連通し且つ第2ポートと第4ポートが連通する。第2状態の四方切換弁(15)では、第1ポートと第4ポートが連通し且つ第2ポートと第3ポートが連通する。 The outdoor expansion valve (14) is an electronic expansion valve with a variable opening. The four-way switching valve (15) has first to fourth ports. In the four-way switching valve (15), the first port is connected to the discharge side of the compressor (12), the second port is connected to the suction side of the compressor (12), and the third port is the outdoor heat exchanger (13 ) And the fourth port is connected to the gas-side stop valve (5). The four-way selector valve (15) switches between a first state (state indicated by a solid line in FIG. 1) and a second state (state indicated by a broken line in FIG. 1). In the four-way selector valve (15) in the first state, the first port communicates with the third port, and the second port communicates with the fourth port. In the four-way selector valve (15) in the second state, the first port communicates with the fourth port and the second port communicates with the third port.
  2本の連絡配管は、液連絡配管(2)及びガス連絡配管(3))によって構成される。液連絡配管(2)は、一端が液側閉鎖弁(4)に接続され、他端が室内熱交換器(32)の液側端部に接続される。ガス連絡配管(3)は、一端がガス側閉鎖弁(5)に接続され、他端が室内熱交換器(32)のガス側端部に接続される。 The two communication pipes consist of a liquid communication pipe (2) and a gas communication pipe (3). One end of the liquid communication pipe (2) is connected to the liquid side closing valve (4), and the other end is connected to the liquid side end of the indoor heat exchanger (32). One end of the gas communication pipe (3) is connected to the gas side shut-off valve (5), and the other end is connected to the gas side end of the indoor heat exchanger (32).
  室内ユニット(20)には、室内熱交換器(32)と室内膨張弁(39)とが設けられる。室内熱交換器(32)は、フィン・アンド・チューブ式の熱交換器である。室内熱交換器(32)の近傍には、室内ファン(27)が設置される。室内ファン(27)は、室内ファンモータ(27a)によって駆動される遠心式の送風機である。室内ファンモータ(27a)は、インバータ装置によって、その回転数が可変に構成されている。室内膨張弁(39)は、冷媒回路(C)において室内熱交換器(32)の液端部側に接続される。室内膨張弁(39)は、開度が可変な電子膨張弁で構成される。 The indoor unit (20) is provided with an indoor heat exchanger (32) and an indoor expansion valve (39). The indoor heat exchanger (32) is a fin-and-tube heat exchanger. An indoor fan (27) is installed in the vicinity of the indoor heat exchanger (32). The indoor fan (27) is a centrifugal blower driven by an indoor fan motor (27a). The indoor fan motor (27a) is configured to have a variable rotational speed by an inverter device. The indoor expansion valve (39) is connected to the liquid end side of the indoor heat exchanger (32) in the refrigerant circuit (C). The indoor expansion valve (39) is an electronic expansion valve having a variable opening.
  〈室内ユニットの詳細構造〉
  空気調和機(10)の室内ユニット(20)の詳細構造について図2~図4を参照しながら説明する。本実施形態の室内ユニット(20)は、天井埋込式に構成されている。つまり、室内ユニット(20)は、図3に示すように、室内空間(R)に面する天井(U)の開口部(O)に嵌め込まれて取り付けられる。室内ユニット(20)は、室内ユニット本体(21)と、該室内ユニット本体(21)の下部に取り付けられる化粧パネル(40)とを有している。
<Detailed structure of indoor unit>
The detailed structure of the indoor unit (20) of the air conditioner (10) will be described with reference to FIGS. The indoor unit (20) of the present embodiment is configured to be embedded in the ceiling. That is, as shown in FIG. 3, the indoor unit (20) is fitted and attached to the opening (O) of the ceiling (U) facing the indoor space (R). The indoor unit (20) has an indoor unit main body (21) and a decorative panel (40) attached to the lower part of the indoor unit main body (21).
  -室内ユニット本体-
  図2及び図3に示すように、室内ユニット本体(21)は、略直方体形状の箱形のケーシング(22)を有している。ケーシング(22)は、平面視において略正方形状の天板(23)と、該天板(23)の周縁部から下方に延びる略矩形状の4枚の側板(24)とを有し、下面に開口が形成されている。図2に示すように、4つの側板(24)のうちの1つの側板(24a)には、縦長の箱形の電装品箱(25)が取り付けられる。また、この側板(24a)には、室内熱交換器(32)と接続する液側接続管(6)とガス側接続管(7)とが貫通している。液側接続管(6)には、液連絡配管(2)が接続され、ガス側接続管(7)には、ガス連絡配管(3)が接続される。
-Indoor unit body-
As shown in FIGS. 2 and 3, the indoor unit body (21) has a box-shaped casing (22) having a substantially rectangular parallelepiped shape. The casing (22) has a substantially square top plate (23) in plan view and four substantially rectangular side plates (24) extending downward from the peripheral edge of the top plate (23), and the bottom surface An opening is formed in the. As shown in FIG. 2, a vertically long box-shaped electrical component box (25) is attached to one side plate (24a) of the four side plates (24). In addition, a liquid side connection pipe (6) and a gas side connection pipe (7) connected to the indoor heat exchanger (32) pass through the side plate (24a). A liquid communication pipe (2) is connected to the liquid side connection pipe (6), and a gas communication pipe (3) is connected to the gas side connection pipe (7).
  ケーシング(22)の内部には、室内ファン(27)と、ベルマウス(31)と、室内熱交換器(32)と、ドレンパン(36)とが収容されている。 Inside the casing (22), an indoor fan (27), a bell mouth (31), an indoor heat exchanger (32), and a drain pan (36) are accommodated.
  図3及び図4に示すように、室内ファン(27)は、ケーシング(22)の内部中央に配置されている。室内ファン(27)は、室内ファンモータ(27a)と、ハブ(28)と、シュラウド(29)と、羽根車(30)とを有している。室内ファンモータ(27a)は、ケーシング(22)の天板(23)に支持されている。ハブ(28)は、室内ファンモータ(27a)の回転駆動される駆動軸(27b)の下端に固定されている。ハブ(28)は、室内ファンモータ(27a)の径方向外方に形成される環状の基部(28a)と、該基部(28a)の内周縁部から下方に膨出する中央膨出部(28b)とを有している。 As shown in FIGS. 3 and 4, the indoor fan (27) is disposed in the center of the casing (22). The indoor fan (27) includes an indoor fan motor (27a), a hub (28), a shroud (29), and an impeller (30). The indoor fan motor (27a) is supported by the top plate (23) of the casing (22). The hub (28) is fixed to the lower end of the drive shaft (27b) that is rotationally driven by the indoor fan motor (27a). The hub (28) includes an annular base (28a) formed radially outward of the indoor fan motor (27a), and a central bulge (28b) bulging downward from the inner peripheral edge of the base (28a). ).
  シュラウド(29)は、ハブ(28)の基部(28a)に対向するように、該基部(28a)の下側に配置される。シュラウド(29)の下部には、ベルマウス(31)の内部と連通する円形の中央吸込口(29a)が形成される。羽根車(30)は、ハブ(28)とシュラウド(29)との間の羽根収容空間(29b)に配置されている。羽根車(30)は、駆動軸(27b)の回転方向に沿うように配列された複数のターボ翼(30a)によって構成されている。 The shroud (29) is disposed below the base (28a) so as to face the base (28a) of the hub (28). A circular central suction port (29a) communicating with the inside of the bell mouth (31) is formed in the lower portion of the shroud (29). The impeller (30) is disposed in a blade accommodating space (29b) between the hub (28) and the shroud (29). The impeller (30) is composed of a plurality of turbo blades (30a) arranged so as to be along the rotation direction of the drive shaft (27b).
  ベルマウス(31)は、室内ファン(27)の下側に配置されている。ベルマウス(31)は、上端及び下端にそれぞれ円形の開口を有し、化粧パネル(40)に向かうにつれて開口面積が拡大した筒状に形成される。ベルマウス(31)の内部空間(31a)は、室内ファン(27)の羽根収容空間(29b)に連通している。 The bell mouth (31) is located below the indoor fan (27). The bell mouth (31) has a circular opening at the upper end and the lower end, respectively, and is formed in a cylindrical shape whose opening area increases toward the decorative panel (40). The internal space (31a) of the bell mouth (31) communicates with the blade housing space (29b) of the indoor fan (27).
  図4に示すように、室内熱交換器(32)は、室内ファン(27)の周囲を囲むように冷媒配管(伝熱管)が曲げられて配設されている。室内熱交換器(32)は、上方に起立するようにドレンパン(36)の上面に設置されている。室内熱交換器(32)には、室内ファン(27)から側方へ吹き出された空気が通過する。室内熱交換器(32)は、冷房運転時に空気を冷却する蒸発器を構成し、暖房運転時に空気を加熱する凝縮器(放熱器)を構成する。 As shown in FIG. 4, the indoor heat exchanger (32) is provided with a refrigerant pipe (heat transfer tube) bent so as to surround the indoor fan (27). The indoor heat exchanger (32) is installed on the upper surface of the drain pan (36) so as to stand up. The air blown to the side from the indoor fan (27) passes through the indoor heat exchanger (32). The indoor heat exchanger (32) constitutes an evaporator that cools the air during the cooling operation, and constitutes a condenser (heat radiator) that heats the air during the heating operation.
  図3及び図4に示すように、室内熱交換器(32)の下側には、ドレンパン(36)が配置される。ドレンパン(36)は、内壁部(36a)と外壁部(36b)と水受部(36c)とを有している。内壁部(36a)は、室内熱交換器(32)の内周縁部に沿って形成され、上方に立設する環状の縦壁によって構成される。外壁部(36b)は、ケーシング(22)の4枚の側板(24)に沿って形成され、上方に立設する環状の縦壁によって構成される。水受部(36c)は、内壁部(36a)と外壁部(36b)との間に形成され、室内熱交換器(32)で発生した凝縮水を回収するための溝によって構成される。また、ドレンパン(36)の外壁部(36b)には、各々が4枚の側板(24)に沿って延びる4つの本体側吹出流路(37)が上下に貫通して形成される。各本体側吹出流路(37)は、室内熱交換器(32)の下流側の空間と、化粧パネル(40)の4つのパネル側吹出流路(43)とを連通させる。 As shown in FIGS. 3 and 4, a drain pan (36) is disposed below the indoor heat exchanger (32). The drain pan (36) has an inner wall part (36a), an outer wall part (36b), and a water receiving part (36c). The inner wall portion (36a) is formed along the inner peripheral edge portion of the indoor heat exchanger (32), and is configured by an annular vertical wall standing upward. The outer wall portion (36b) is formed along the four side plates (24) of the casing (22), and is configured by an annular vertical wall that stands upward. The water receiving part (36c) is formed between the inner wall part (36a) and the outer wall part (36b), and is constituted by a groove for collecting condensed water generated in the indoor heat exchanger (32). Moreover, four main body side blowing channels (37) each extending along the four side plates (24) are formed through the top and bottom of the outer wall (36b) of the drain pan (36). Each main body side blowing channel (37) communicates the space on the downstream side of the indoor heat exchanger (32) with the four panel side blowing channels (43) of the decorative panel (40).
  また、室内ユニット本体(21)には、本体側断熱部材(38)が設けられている。本体側断熱部材(38)は、下側が開放する略箱状に形成される。本体側断熱部材(38)は、ケーシング(22)の天板(23)に沿って形成される天板側断熱部(38a)と、ケーシング(22)の側板(24)に沿って形成される側板側断熱部(38b)とを有している。天板側断熱部(38a)の中央部には、室内ファンモータ(27a)の上端部が貫通する円形の貫通穴(38c)が形成される。側板側断熱部(38b)は、ドレンパン(36)の外壁部(36b)のうち本体側吹出流路(37)の外側部位に設置される。 In addition, the indoor unit main body (21) is provided with a main body side heat insulating member (38). The main body side heat insulating member (38) is formed in a substantially box shape whose lower side is opened. The main body side heat insulating member (38) is formed along the top plate side heat insulating portion (38a) formed along the top plate (23) of the casing (22) and the side plate (24) of the casing (22). And a side plate side heat insulating portion (38b). A circular through hole (38c) through which the upper end of the indoor fan motor (27a) passes is formed at the center of the top plate heat insulating part (38a). The side plate side heat insulating part (38b) is installed in the outer part of the main body side outlet channel (37) in the outer wall part (36b) of the drain pan (36).
  -化粧パネル-
  化粧パネル(40)は、ケーシング(22)の下面に取り付けられる。化粧パネル(40)は、パネル本体(41)と吸込グリル(60)とを備えている。
-Cosmetic panel-
The decorative panel (40) is attached to the lower surface of the casing (22). The decorative panel (40) includes a panel body (41) and a suction grill (60).
  パネル本体(41)は、平面視において矩形の枠状に形成されている。パネル本体(41)には、1つのパネル側吸込流路(42)と、4つのパネル側吹出流路(43)とが形成される。 The panel body (41) is formed in a rectangular frame shape in plan view. The panel body (41) is formed with one panel side suction channel (42) and four panel side outlet channels (43).
  図3に示すように、パネル側吸込流路(42)は、パネル本体(41)の中央部に形成されている。パネル側吸込流路(42)の下端には、室内空間(R)に臨む吸込口(42a)が形成される。パネル側吸込流路(42)は、吸込口(42a)とベルマウス(31)の内部空間(31a)とを連通させる。パネル側吸込流路(42)には、枠状の内側パネル部材(44)が内嵌している。また、パネル側吸込流路(42)の内部には、吸込口(42a)から吸い込んだ空気中の塵埃を捕捉する集塵フィルタ(45)が設けられる。 As shown in FIG. 3, the panel-side suction channel (42) is formed at the center of the panel body (41). A suction port (42a) facing the indoor space (R) is formed at the lower end of the panel-side suction flow path (42). The panel-side suction channel (42) allows the suction port (42a) to communicate with the internal space (31a) of the bell mouth (31). A frame-like inner panel member (44) is fitted in the panel-side suction flow path (42). In addition, a dust collection filter (45) that captures dust in the air sucked from the suction port (42a) is provided inside the panel-side suction flow path (42).
  各パネル側吹出流路(43)は、パネル側吸込流路(42)の周囲を囲むように、該パネル側吸込流路(42)の外側に形成される。各パネル側吹出流路(43)は、各パネル側吸込流路(42)の四辺に沿ってそれぞれ延びている。各パネル側吹出流路(43)の下端には、室内空間(R)に臨む吹出口(43a)がそれぞれ形成される。各パネル側吹出流路(43)は、対応する吹出口(43a)と、対応する本体側吹出流路(37)とを連通させる。 Each panel side outlet channel (43) is formed outside the panel side inlet channel (42) so as to surround the panel side inlet channel (42). Each panel side blowing channel (43) extends along four sides of each panel side suction channel (42). Air outlets (43a) facing the indoor space (R) are formed at the lower ends of the panel-side outlet channels (43), respectively. Each panel side blowing flow path (43) makes the corresponding blower outlet (43a) and the corresponding main body side blowing flow path (37) communicate.
  図3に示すように、パネル側吹出流路(43)の内側(パネル本体(41)の中央部側)には、内側断熱部(46)が設けられている。また、パネル側吹出流路(43)の外側(パネル本体(41)の外縁部側)には、外側断熱部(47)が設けられている。内側断熱部(46)及び外側断熱部(47)の上面には、パネル本体(41)とドレンパン(36)との間に介設される内側シール部材(48)が設けられる。 As shown in FIG. 3, an inner heat insulating part (46) is provided inside the panel side blowing channel (43) (on the center part side of the panel body (41)). Moreover, the outer side heat insulation part (47) is provided in the outer side (outer edge part side of a panel main body (41)) of the panel side blowing flow path (43). An inner seal member (48) interposed between the panel main body (41) and the drain pan (36) is provided on the upper surfaces of the inner heat insulating portion (46) and the outer heat insulating portion (47).
  外側断熱部(47)の内縁部には、外側パネル部材(49)が内嵌している。外側パネル部材(49)は、本体側吹出流路(37)の内壁面を構成する内壁部(50)と、該内壁部(50)の下端部からパネル本体(41)の外縁部に向かって延出する延出部(51)とを有している。延出部(51)は、天井(U)の下面に沿った矩形枠状に形成されている。延出部(51)の上面には、該延出部(51)と天井(U)の間に介設される外側シール部材(52)が設けられる。 The outer panel member (49) is fitted into the inner edge of the outer heat insulating portion (47). The outer panel member (49) has an inner wall portion (50) that constitutes an inner wall surface of the main body side outlet channel (37), and a lower end portion of the inner wall portion (50) toward an outer edge portion of the panel main body (41). And an extending portion (51) extending. The extension part (51) is formed in a rectangular frame shape along the lower surface of the ceiling (U). An outer seal member (52) interposed between the extension part (51) and the ceiling (U) is provided on the upper surface of the extension part (51).
  また、各本体側吹出流路(37)には、本体側吹出流路(37)を流れる空気(吹出空気)の風向を調節するための風向調節羽根(53)が設けられている。風向調節羽根(53)は、ケーシング(22)の側板(24)に沿うように本体側吹出流路(37)の長手方向の両端に亘って形成される。風向調節羽根(53)は、その長手方向に延びる回動軸(53a)を軸心として回動自在に構成される。 In addition, each body side blowing passage (37) is provided with a wind direction adjusting blade (53) for adjusting the wind direction of the air (blowing air) flowing through the body side blowing passage (37). The wind direction adjusting blade (53) is formed across both ends in the longitudinal direction of the main body outlet channel (37) along the side plate (24) of the casing (22). The wind direction adjusting blade (53) is configured to be rotatable about an axis of rotation (53a) extending in the longitudinal direction.
  吸込グリル(60)は、パネル側吸込流路(42)の下端(即ち、吸込口(42a))に取り付けられる。吸込グリル(60)は、吸込口(42a)に面するグリル本体(61)と、グリル本体(61)から各吹出口(43a)側に向かって外側に延出する矩形状の延長部(65)とを有している。グリル本体(61)は、平面視において略正方形状に形成されている。グリル本体(61)の中央部には、多数の吸込孔(63)が格子状に配列される。これらの吸込孔(63)は、グリル本体(61)を厚さ方向(上下方向)に貫通する貫通孔によって構成される。吸込孔(63)は、その開口断面の形状が正方形状に形成される。 The suction grill (60) is attached to the lower end (that is, the suction port (42a)) of the panel side suction flow path (42). The suction grill (60) includes a grill main body (61) facing the suction inlet (42a) and a rectangular extension (65 extending outward from the grill main body (61) toward each outlet (43a). ). The grill body (61) is formed in a substantially square shape in plan view. A large number of suction holes (63) are arranged in a lattice pattern at the center of the grill body (61). These suction holes (63) are constituted by through holes that penetrate the grill body (61) in the thickness direction (vertical direction). The suction hole (63) is formed in a square shape in the opening cross section.
  吸込グリル(60)の延長部(65)は、グリル本体(61)から吹出口(43a)に向かって外方に延出する矩形枠状に形成される。延長部(65)は、内側断熱部(46)の下面と重なるように、パネル本体(41)と上下方向にオーバーラップしている。また、延長部(65)の側方端部は、吹出口(43a)の内側縁部よりも吸込口(42a)寄りにシフトしている。 The extension portion (65) of the suction grill (60) is formed in a rectangular frame shape extending outward from the grill body (61) toward the outlet (43a). The extension part (65) overlaps with the panel body (41) in the vertical direction so as to overlap the lower surface of the inner heat insulating part (46). Moreover, the side edge part of the extension part (65) has shifted to the suction inlet (42a) rather than the inner edge part of the blower outlet (43a).
  -運転動作-
  次いで、本実施形態に係る空気調和機(10)の運転動作について説明する。空気調和機(10)では、冷房運転と暖房運転とが切り換えて行われる。
-Driving operation-
Next, the operation of the air conditioner (10) according to this embodiment will be described. In the air conditioner (10), the cooling operation and the heating operation are switched.
  〈冷房運転〉
  冷房運転では、図1に示す四方切換弁(15)が実線で示す状態となり、圧縮機(12)、室内ファン(27)、室外ファン(16)が運転状態となる。これにより、冷媒回路(C)では、室外熱交換器(13)が凝縮器となり、室内熱交換器(32)が蒸発器となる冷凍サイクルが行われる。
<Cooling operation>
In the cooling operation, the four-way switching valve (15) shown in FIG. 1 is in a state indicated by a solid line, and the compressor (12), the indoor fan (27), and the outdoor fan (16) are in an operating state. Thereby, in the refrigerant circuit (C), a refrigeration cycle is performed in which the outdoor heat exchanger (13) serves as a condenser and the indoor heat exchanger (32) serves as an evaporator.
  具体的には、圧縮機(12)で圧縮された高圧冷媒は、室外熱交換器(13)を流れ、室外空気と熱交換する。室外熱交換器(13)では、高圧冷媒が室外空気へ放熱して凝縮する。室外熱交換器(13)で凝縮した冷媒は、室内ユニット(20)へ送られる。室内ユニット(20)では、冷媒が室内膨張弁(39)で減圧された後、室内熱交換器(32)を流れる。 Specifically, the high-pressure refrigerant compressed by the compressor (12) flows through the outdoor heat exchanger (13) and exchanges heat with outdoor air. In the outdoor heat exchanger (13), the high-pressure refrigerant dissipates heat to the outdoor air and condenses. The refrigerant condensed in the outdoor heat exchanger (13) is sent to the indoor unit (20). In the indoor unit (20), the refrigerant flows through the indoor heat exchanger (32) after being decompressed by the indoor expansion valve (39).
  室内ユニット(20)では、室内空気が吸込口(42a)、パネル側吸込流路(42)、ベルマウス(31)の内部空間(31a)を順に上方に流れ、室内ファン(27)の羽根収容空間(29b)へ吸い込まれる。羽根収容空間(29b)の空気は、羽根車(30)によって搬送され、ハブ(28)とシュラウド(29)の間から径方向外方へ吹き出される。この空気は、室内熱交換器(32)を通過し、冷媒と熱交換する。室内熱交換器(32)では、冷媒が室内空気から吸熱して蒸発し、空気が冷媒によって冷却される。 In the indoor unit (20), room air flows upward in order through the suction port (42a), the panel-side suction flow path (42), and the internal space (31a) of the bell mouth (31), and accommodates the blades of the indoor fan (27). It is sucked into the space (29b). The air in the blade accommodating space (29b) is conveyed by the impeller (30) and blown out radially between the hub (28) and the shroud (29). This air passes through the indoor heat exchanger (32) and exchanges heat with the refrigerant. In the indoor heat exchanger (32), the refrigerant absorbs heat from the indoor air and evaporates, and the air is cooled by the refrigerant.
  室内熱交換器(32)で冷却された空気は、各本体側吹出流路(37)に分流した後、パネル側吹出流路(43)を下方に流れ、吹出口(43a)より室内空間(R)へ供給される。また、室内熱交換器(32)で蒸発した冷媒は、圧縮機(12)に吸入され再び圧縮される。     The air cooled by the indoor heat exchanger (32) is diverted to each main body side outlet passage (37), then flows downward through the panel side outlet passage (43), and passes through the outlet (43a) to the indoor space ( To R). The refrigerant evaporated in the indoor heat exchanger (32) is sucked into the compressor (12) and compressed again. .
 
  〈暖房運転〉
  暖房運転では、図1に示す四方切換弁(15)が破線で示す状態となり、圧縮機(12)、室内ファン(27)、室外ファン(16)が運転状態となる。これにより、冷媒回路(C)では、室内熱交換器(32)が凝縮器となり、室外熱交換器(13)が蒸発器となる冷凍サイクルが行われる。

<Heating operation>
In the heating operation, the four-way switching valve (15) shown in FIG. 1 is in a state indicated by a broken line, and the compressor (12), the indoor fan (27), and the outdoor fan (16) are in an operating state. Thereby, in the refrigerant circuit (C), a refrigeration cycle is performed in which the indoor heat exchanger (32) serves as a condenser and the outdoor heat exchanger (13) serves as an evaporator.
  具体的には、圧縮機(12)で圧縮された高圧冷媒は、室内ユニット(20)の室内熱交換器(32)を流れる。室内ユニット(20)では、室内空気が吸込口(42a)、パネル側吸込流路(42)、ベルマウス(31)の内部空間(31a)を順に上方に流れ、室内ファン(27)の羽根収容空間(29b)へ吸い込まれる。羽根収容空間(29b)の空気は、羽根車(30)によって搬送され、ハブ(28)とシュラウド(29)の間から径方向外方へ吹き出される。この空気は、室内熱交換器(32)を通過し、冷媒と熱交換する。室内熱交換器(32)では、冷媒が室内空気へ放熱して凝縮し、空気が冷媒によって加熱される。 Specifically, the high-pressure refrigerant compressed by the compressor (12) flows through the indoor heat exchanger (32) of the indoor unit (20). In the indoor unit (20), room air flows upward in order through the suction port (42a), the panel-side suction flow path (42), and the internal space (31a) of the bell mouth (31), and accommodates the blades of the indoor fan (27). It is sucked into the space (29b). The air in the blade accommodating space (29b) is conveyed by the impeller (30) and blown out radially between the hub (28) and the shroud (29). This air passes through the indoor heat exchanger (32) and exchanges heat with the refrigerant. In the indoor heat exchanger (32), the refrigerant dissipates heat to the indoor air and condenses, and the air is heated by the refrigerant.
  室内熱交換器(32)で加熱された空気は、各本体側吹出流路(37)に分流した後、パネル側吹出流路(43)を下方に流れ、吹出口(43a)より室内空間(R)へ供給される。また、室内熱交換器(32)で凝縮した冷媒は、室外膨張弁(14)で減圧された後、室外熱交換器(13)を流れる。室外熱交換器(13)では、冷媒が室外空気から吸熱して蒸発する。室外熱交換器(13)で蒸発した冷媒は、圧縮機(12)に吸入され再び圧縮される。 The air heated by the indoor heat exchanger (32) is diverted to each main body-side outlet passage (37), then flows downward through the panel-side outlet passage (43), and passes through the outlet (43a) to the indoor space ( To R). The refrigerant condensed in the indoor heat exchanger (32) is depressurized by the outdoor expansion valve (14) and then flows through the outdoor heat exchanger (13). In the outdoor heat exchanger (13), the refrigerant absorbs heat from the outdoor air and evaporates. The refrigerant evaporated in the outdoor heat exchanger (13) is sucked into the compressor (12) and compressed again.
  〈ガス側配管、液側配管、及びそれらの周辺構造〉
  次いで、室内ユニット(20)の内部に収容されるガス側配管(70)、液側配管(80)、及びその周辺構造について図5~図7を参照しながら詳細に説明する。
<Gas side piping, liquid side piping, and their peripheral structure>
Next, the gas side pipe (70), the liquid side pipe (80) and the peripheral structure housed in the indoor unit (20) will be described in detail with reference to FIGS.
  室内熱交換器(32)には、第1側端部(32a)と第2側端部(32b)とが形成される。第1側端部(32a)は、室内熱交換器(32)の伝熱管の長手方向の一方の側端に形成され、第2側端部(32b)は、室内熱交換器(32)の伝熱管の長手方向の他方の側端に形成される。ガス側配管(70)及び液側配管(80)は、室内熱交換器(32)の第1側端部(32a)と第2側端部(32b)との間の配管収容空間(S)に設置される。 The first end (32a) and the second end (32b) are formed in the indoor heat exchanger (32). The first side end (32a) is formed at one side end in the longitudinal direction of the heat transfer tube of the indoor heat exchanger (32), and the second side end (32b) is formed at the indoor heat exchanger (32). It is formed at the other side end in the longitudinal direction of the heat transfer tube. The gas side pipe (70) and the liquid side pipe (80) are connected to the pipe housing space (S) between the first side end (32a) and the second side end (32b) of the indoor heat exchanger (32). Installed.
  ガス側配管(70)は、室内熱交換器(32)のガス側端部と上述したガス側接続管(7)との間に亘って形成される。ガス側配管(70)は、室内熱交換器(32)に接続されるヘッダ(71)と、該ヘッダ(71)とガス側接続管(7)の間に接続されるガス中継管(72)とを有している。 The gas side pipe (70) is formed between the gas side end of the indoor heat exchanger (32) and the gas side connection pipe (7) described above. The gas side pipe (70) includes a header (71) connected to the indoor heat exchanger (32), and a gas relay pipe (72) connected between the header (71) and the gas side connection pipe (7). And have.
  ヘッダ(71)は、室内熱交換器(32)の第1側端部(32a)の近傍に配置される。ヘッダ(71)は、ヘッダ本体(71a)と、該ヘッダ本体(71a)から分岐する複数の分岐管(71b)とを有している。ヘッダ本体(71a)は、室内熱交換器(32)の第1側端部(32a)に沿うように上下方向に延びている。つまり、ヘッダ本体(71a)は、室内熱交換器(32)の第1側端部(32a)と所定の間隔を置くように、該第1側端部(32a)と平行になっている。ヘッダ本体(71a)は、冷房時において、各分岐管(71b)から流出した冷媒を合流させる。また、ヘッダ本体(71a)は、暖房時において、ガス中継管(72)から流出した冷媒を各分岐管(71b)へ分流させる。 The header (71) is disposed in the vicinity of the first side end (32a) of the indoor heat exchanger (32). The header (71) includes a header body (71a) and a plurality of branch pipes (71b) branching from the header body (71a). The header body (71a) extends in the vertical direction along the first side end (32a) of the indoor heat exchanger (32). That is, the header main body (71a) is parallel to the first side end (32a) so as to be spaced from the first side end (32a) of the indoor heat exchanger (32). The header body (71a) joins the refrigerant that has flowed out of the branch pipes (71b) during cooling. In addition, the header body (71a) diverts the refrigerant that has flowed out of the gas relay pipe (72) to each branch pipe (71b) during heating.
  複数の分岐管(71b)は、ヘッダ本体(71a)と室内熱交換器(32)の第1側端部(32a)との間に配設されている。各分岐管(71b)は、互いに平行となるようにヘッダ本体(71a)の側面に沿った方向(上下方向)に配列される。各分岐管(71b)の一端は、室内熱交換器(32)の第1側端部(32a)の各伝熱管に接続される。つまり、ヘッダ(71)は、室内熱交換器(32)の両側の側端部のうち第1側端部(32a)の伝熱管に接続される。各分岐管(71b)の他端は、ヘッダ本体(71a)に接続され、該ヘッダ本体(71a)の内部と連通している。 The plurality of branch pipes (71b) are disposed between the header body (71a) and the first side end (32a) of the indoor heat exchanger (32). Each branch pipe (71b) is arranged in a direction (vertical direction) along the side surface of the header body (71a) so as to be parallel to each other. One end of each branch pipe (71b) is connected to each heat transfer pipe of the first side end (32a) of the indoor heat exchanger (32). That is, the header (71) is connected to the heat transfer tube of the first side end (32a) among the side ends on both sides of the indoor heat exchanger (32). The other end of each branch pipe (71b) is connected to the header body (71a) and communicates with the inside of the header body (71a).
  ガス中継管(72)は、ヘッダ本体(71a)からガス側接続管(7)に向かって順に、第1曲管部(73)(曲管部)、第1縦管部(74)(縦管部)、及び第1横管部(75)が連続して構成される。第1曲管部(73)は、側面視において、上側が開放された略U字状の外形を有している。第1曲管部(73)は、ヘッダ本体(71a)の下端部と第1縦管部(74)の下端部とを繋いでいる。第1縦管部(74)は、ヘッダ本体(71a)の下部側面と対向するように上下方向に延びている。第1縦管部(74)は、第1曲管部(73)と第1横管部(75)とを繋いでいる。第1横管部(75)は、第1縦管部(74)の上端部から水平方向に屈曲し、ガス側接続管(7)と接続している。ガス中継管(72)では、ヘッダ本体(71a)と第1曲管部(73)と第1縦管部(74)との間に、縦長の空間(S1)が形成される。 The gas relay pipe (72) has a first curved pipe section (73) (curved pipe section) and a first vertical pipe section (74) (vertical) in order from the header body (71a) to the gas side connection pipe (7). Tube portion) and the first horizontal tube portion (75) are continuously formed. The first curved pipe portion (73) has a substantially U-shaped outer shape whose upper side is opened in a side view. The 1st curved pipe part (73) has connected the lower end part of the header main body (71a), and the lower end part of the 1st vertical pipe part (74). The first vertical pipe portion (74) extends in the vertical direction so as to face the lower side surface of the header body (71a). The 1st vertical pipe part (74) has connected the 1st curved pipe part (73) and the 1st horizontal pipe part (75). The 1st horizontal pipe part (75) is bent in the horizontal direction from the upper end part of the 1st vertical pipe part (74), and is connected with the gas side connection pipe (7). In the gas relay pipe (72), a vertically long space (S1) is formed between the header body (71a), the first curved pipe part (73), and the first vertical pipe part (74).
  液側配管(80)は、室内熱交換器(32)の液側端部と上述した液側接続管(6)との間に亘って形成される。液側配管(80)は、分流器(81)と、該分流器(81)と液側接続管(6)との間に接続される液中継管(82)とを有している。分流器(81)は、室内熱交換器(32)の第1側端部(32a)の近傍に配置される。分流器(81)は、分流器本体(81a)と、該分流器本体(81a)から分岐する複数の分流管(81b)とを有している。 The liquid side pipe (80) is formed between the liquid side end of the indoor heat exchanger (32) and the liquid side connecting pipe (6) described above. The liquid side pipe (80) includes a flow divider (81) and a liquid relay pipe (82) connected between the flow divider (81) and the liquid side connection pipe (6). The flow divider (81) is disposed in the vicinity of the first side end (32a) of the indoor heat exchanger (32). The shunt (81) has a shunt main body (81a) and a plurality of shunt pipes (81b) branched from the shunt main body (81a).
  分流器本体(81a)は、室内熱交換器(32)の外側に配置されている。具体的には、室内熱交換器(32)の第1側端部(32a)寄りの下流面に沿った仮想平面をP1とすると(図6を参照)、分流器本体(81a)は、この仮想平面P1とケーシング(22)の側板(24)との間に配置される。分流器本体(81a)は、軸心が上下に延びる有底筒状に形成され、その上端面に複数の分流管(81b)が接続される。分流器本体(81a)は、冷房時において、液中継管(82)から流出した冷媒を各分流管(81b)へ分流させる。また、分流器本体(81a)は、暖房時において、各分流管(81b)から流出した冷媒を合流させる。複数の分流管(81b)は、分流器本体(81a)と室内熱交換器(32)の第1側端部(32a)との間に配設されている。各分流管(81b)は、分流器本体(81a)よりも流路径が小さいキャピラリーチューブで構成される。 The shunt main body (81a) is arranged outside the indoor heat exchanger (32). Specifically, when the virtual plane along the downstream surface near the first side end (32a) of the indoor heat exchanger (32) is P1 (see FIG. 6), the shunt main body (81a) It arrange | positions between the virtual plane P1 and the side plate (24) of a casing (22). The flow distributor main body (81a) is formed in a bottomed cylindrical shape whose axial center extends vertically, and a plurality of flow dividing tubes (81b) are connected to the upper end surface thereof. The flow divider main body (81a) diverts the refrigerant that has flowed out of the liquid relay pipe (82) to each of the diversion pipes (81b) during cooling. In addition, the flow divider main body (81a) joins the refrigerant that has flowed out of each flow dividing pipe (81b) during heating. The plurality of flow dividing tubes (81b) are disposed between the flow divider main body (81a) and the first side end (32a) of the indoor heat exchanger (32). Each branch pipe (81b) is constituted by a capillary tube having a smaller flow path diameter than the flow distributor body (81a).
  液中継管(82)は、分流器本体(81a)から液側接続管(6)に向かって順に、第2縦管部(83)、第2曲管部(84)、第3縦管部(85)、第2横管部(86)、第3横管部(87)、第4縦管部(88)、第4横管部(89)、第5縦管部(90)、及び第5横管部(91)が連続して構成される。 The liquid relay pipe (82) has a second vertical pipe section (83), a second curved pipe section (84), and a third vertical pipe section in order from the flow distributor main body (81a) toward the liquid side connection pipe (6). (85), second horizontal pipe part (86), third horizontal pipe part (87), fourth vertical pipe part (88), fourth horizontal pipe part (89), fifth vertical pipe part (90), and A 5th horizontal pipe part (91) is comprised continuously.
  第2縦管部(83)は、分流器本体(81a)の下端部から下方に延びている。第2曲管部(84)は、上側が開放された略U字状の外形を有している。第2曲管部(84)は、第2縦管部(83)の下端部と第3縦管部(85)の下端部とを繋いでいる。第3縦管部(85)には、内部を流れる冷媒中の異物を捕捉する第1フィルタ(95)が接続される。第1フィルタ(95)は、分流器本体(81a)と同様にして、室内熱交換器(32)の外側に配置される。第2横管部(86)は、第3縦管部(85)の上端部から室内ファン(27)側に向かって水平方向に延びている。つまり、第2横管部(86)は、室内熱交換器(32)の外側から該室内熱交換器(32)の内側に亘って形成される。第2横管部(86)は、ガス側配管(70)の第1曲管部(73)と交差するように、該第1曲管部(73)の上側に配設される。 The second vertical pipe portion (83) extends downward from the lower end portion of the shunt main body (81a). The second curved pipe portion (84) has a substantially U-shaped outer shape whose upper side is open. The 2nd curved pipe part (84) has connected the lower end part of the 2nd vertical pipe part (83), and the lower end part of the 3rd vertical pipe part (85). A first filter (95) that captures foreign matters in the refrigerant flowing inside is connected to the third vertical pipe portion (85). The first filter (95) is disposed outside the indoor heat exchanger (32) in the same manner as the flow divider body (81a). The second horizontal pipe (86) extends in the horizontal direction from the upper end of the third vertical pipe (85) toward the indoor fan (27). That is, the second horizontal pipe portion (86) is formed from the outside of the indoor heat exchanger (32) to the inside of the indoor heat exchanger (32). The second horizontal pipe portion (86) is disposed on the upper side of the first curved pipe portion (73) so as to intersect the first curved pipe portion (73) of the gas side pipe (70).
  第2横管部(86)の内側端部には、上述した室内膨張弁(39)が接続される。室内膨張弁(39)は、室内熱交換器(32)の内側に配置される。具体的には、室内熱交換器(32)の第1側端部(32a)寄りの上流面に沿った仮想平面をP2(図6を参照)とすると、室内膨張弁(39)は、この仮想平面P2よりも室内ファン(27)の軸心寄りに配置される。 The indoor expansion valve (39) described above is connected to the inner end of the second horizontal pipe (86). The indoor expansion valve (39) is disposed inside the indoor heat exchanger (32). Specifically, if the virtual plane along the upstream surface near the first side end (32a) of the indoor heat exchanger (32) is P2 (see FIG. 6), the indoor expansion valve (39) Arranged closer to the axis of the indoor fan (27) than the virtual plane P2.
  第3横管部(87)は、室内膨張弁(39)の下端部からケーシング(22)に向かって水平方向に延びている。第4縦管部(88)は、ヘッダ(71)と第1縦管部(74)に沿うように上下方向に延びている。第4縦管部(88)は、ガス側配管(70)のヘッダ(71)と第1曲管部(73)と第1縦管部(74)との間の空間(S)に配設される。第4横管部(89)は、第4縦管部(88)の下端部から屈曲して水平方向に延びている。第5縦管部(90)は、第4縦管部(88)の内側端部から上方に屈曲し、上下方向に延びている。第5縦管部(90)には、内部を流れる冷媒中の異物を捕捉する第2フィルタ(97)が接続される。第2フィルタ(97)は、室内膨張弁(39)と同様にして、室内熱交換器(32)の内側に配置される。第5横管部(91)は、第4縦管部(88)の上端部から水平方向に屈曲し、液側接続管(6)と接続している。 The third horizontal pipe portion (87) extends in the horizontal direction from the lower end portion of the indoor expansion valve (39) toward the casing (22). The fourth vertical pipe portion (88) extends in the vertical direction along the header (71) and the first vertical pipe portion (74). The fourth vertical pipe (88) is disposed in the space (S) between the header (71), the first curved pipe (73), and the first vertical pipe (74) of the gas side pipe (70). Is done. The fourth horizontal pipe part (89) is bent from the lower end part of the fourth vertical pipe part (88) and extends in the horizontal direction. The fifth vertical pipe portion (90) is bent upward from the inner end of the fourth vertical pipe portion (88) and extends in the vertical direction. The 5th vertical pipe part (90) is connected with the 2nd filter (97) which catches the foreign material in the refrigerant which flows through the inside. The second filter (97) is disposed inside the indoor heat exchanger (32) in the same manner as the indoor expansion valve (39). The fifth horizontal pipe (91) is bent in the horizontal direction from the upper end of the fourth vertical pipe (88) and connected to the liquid side connection pipe (6).
  本実施形態では、液中継管(82)の一部が、ガス側配管(70)のヘッダ(71)と第1曲管部(73)と第1縦管部(74)との間の縦長の空間(S1)に配設される。具体的に、本実施形態では、液中継管(82)の第3横管部(87)の外側端部と、第4縦管部(88)と、第4横管部(89)の内側端部とが、上記空間(S1)の内部に配設される。このため、ガス側配管(70)と液側配管(80)とが互いに干渉することなく、液中継管(82)の配管の設置スペースを縮小できる。 In this embodiment, a part of the liquid relay pipe (82) is vertically long between the header (71) of the gas side pipe (70), the first curved pipe part (73), and the first vertical pipe part (74). In the space (S1). Specifically, in the present embodiment, the outer end portion of the third horizontal pipe portion (87) of the liquid relay pipe (82), the fourth vertical pipe portion (88), and the inner side of the fourth horizontal pipe portion (89). The end is disposed inside the space (S1). For this reason, the installation space of the pipe of the liquid relay pipe (82) can be reduced without the gas side pipe (70) and the liquid side pipe (80) interfering with each other.
  また、本実施形態では、室内膨張弁(39)が室内熱交換器(32)の内側に配置される。これにより、ユーザ等は、吸込流路(42)側から室内膨張弁(39)のメンテナンスや交換を行うことができる。一方、分流器(81)は室内熱交換器(32)の外側に配置される。分流器(81)を室内膨張弁(39)とともに室内熱交換器(32)の内側に配置すると、室内熱交換器(32)の内側のスペースが小さくなり、室内ファン(27)の設置スペースを十分に確保できない可能性がある。これに対し、分流器本体(81a)を室内熱交換器(32)の外側に配置することで、室内ファン(27)の設置スペースを確保できる。 In this embodiment, the indoor expansion valve (39) is disposed inside the indoor heat exchanger (32). Thereby, the user etc. can perform maintenance and replacement | exchange of an indoor expansion valve (39) from the suction flow path (42) side. On the other hand, the flow divider (81) is disposed outside the indoor heat exchanger (32). If the shunt (81) is placed inside the indoor heat exchanger (32) together with the indoor expansion valve (39), the space inside the indoor heat exchanger (32) is reduced, and the installation space for the indoor fan (27) is reduced. There is a possibility that it cannot be secured sufficiently. On the other hand, the installation space for the indoor fan (27) can be secured by disposing the shunt main body (81a) outside the indoor heat exchanger (32).
  ここで、本実施形態では、室内膨張弁(39)と分流器本体(81a)とを繋ぐ液中継管(82)の一部(即ち、第2横管部(86))が、U字形状の第1曲管部(73)の上側に配設される。このため、第2横管部(86)の水平方向の設置スペースも小さくなる。 Here, in this embodiment, a part of the liquid relay pipe (82) that connects the indoor expansion valve (39) and the flow divider main body (81a) (that is, the second horizontal pipe portion (86)) is U-shaped. The first curved pipe portion (73) is disposed on the upper side. For this reason, the installation space of the horizontal direction of a 2nd horizontal pipe part (86) also becomes small.
  -実施形態の効果-
   上記実施形態によれば、ガス側配管(70)のヘッダ本体(71a)と第1縦管部(74)と第1曲管部(73)との間の空間(S1)に液側配管(80)の一部を配設することで、液側配管(80)の設置スペースを小さくでき、ひいては室内ユニット(20)の小型化を図ることができる。
-Effects of the embodiment-
According to the above embodiment, the liquid side pipe (70) is formed in the space (S1) between the header body (71a), the first vertical pipe part (74), and the first curved pipe part (73) of the gas side pipe (70). By disposing a part of 80), the installation space of the liquid side pipe (80) can be reduced, and the indoor unit (20) can be downsized.
  また、室内膨張弁(39)を室内熱交換器(32)の内側に配置しているため、室内ファン(27)(吸込グリル(60))側から室内膨張弁(39)を簡便にメンテナンスすることができる。また、室内膨張弁(39)を室内熱交換器(32)の内側に配置し、且つ分流器本体(81a)を室内熱交換器(32)の外側に配置している。このため、室内熱交換器(32)の内側の設置スペースと外側の設置スペースをバランスよく確保できる。また、本実施形態では、室内膨張弁(39)と分流器本体(81a)とを繋ぐ配管(第2横管部(86))を第1曲管部(73))の上側に配置している。このため、液中継管(82)の水平方向の設置スペースが小さくなり、室内ユニット(20)を更に小型化できる。 Moreover, since the indoor expansion valve (39) is arranged inside the indoor heat exchanger (32), the indoor expansion valve (39) can be easily maintained from the indoor fan (27) (suction grill (60)) side. be able to. Further, the indoor expansion valve (39) is arranged inside the indoor heat exchanger (32), and the flow divider main body (81a) is arranged outside the indoor heat exchanger (32). For this reason, the installation space inside the indoor heat exchanger (32) and the installation space outside can be secured with good balance. Moreover, in this embodiment, piping (2nd horizontal pipe part (86)) which connects an indoor expansion valve (39) and a flow divider main body (81a) is arrange | positioned above the 1st curved pipe part (73)). Yes. For this reason, the horizontal installation space of the liquid relay pipe (82) is reduced, and the indoor unit (20) can be further downsized.
  また、上記実施形態では、空気調和機(1)の室内ユニット(20)は、天井(U)の開口部(O)に嵌め込まれる天井埋込式に構成されていた。しかしながら、室内ユニット(20)は、天井に吊り下げられ、室内空間(R)に配置される天井吊下式に構成されていてもよい。 In the above embodiment, the indoor unit (20) of the air conditioner (1) is configured to be embedded in a ceiling that is fitted into the opening (O) of the ceiling (U). However, the indoor unit (20) may be configured to be suspended from the ceiling and suspended from the ceiling disposed in the indoor space (R).
  以上説明したように、本発明は、空気調和機の室内ユニットにおける室内熱交換器の周辺の配管の省スペース化について有用である。 As described above, the present invention is useful for space saving of piping around an indoor heat exchanger in an indoor unit of an air conditioner.
2    液連絡配管
3    ガス連絡配管
10   空気調和機
20   室内ユニット
27   室内ファン
32   室内熱交換器
32a  第1側端部(側端部)
39   室内膨張弁(膨張弁)
70   ガス側配管
71a  ヘッダ本体
73   第1曲管部(曲管部)
74   第1縦管部(縦管部)
80   液側配管
81a  分流器本体
82   液中継管
2 Liquid communication pipe 3 Gas communication pipe 10 Air conditioner 20 Indoor unit 27 Indoor fan 32 Indoor heat exchanger 32a First side end (side end)
39 Indoor expansion valve (expansion valve)
70 Gas side piping 71a Header main body 73 1st curved pipe part (curved pipe part)
74 First vertical pipe (vertical pipe)
80 Liquid side pipe 81a Flow divider body 82 Liquid relay pipe

Claims (3)

  1.   室内ファン(27)と、該室内ファン(27)の周囲を囲むように配置された室内熱交換器(32)と、該室内熱交換器(32)とガス連絡配管(3)とを繋ぐガス側配管(70)と、該室内熱交換器(32)と液連絡配管(2)とを繋ぐ液側配管(80)とを備え、天井に設けられる空気調和機の室内ユニットであって、
      上記ガス側配管(70)は、上記室内熱交換器(32)の側端部(32a)に沿って上下に延びるヘッダ本体(71a)と、該ヘッダ本体(71a)に対向する縦管部(74)と、上記ヘッダ本体(71a)の下端部と上記縦管部(74)の下端部とを接続する曲管部(73)とを有し、
      上記液側配管(80)の一部が、上記ヘッダ本体(71a)と上記縦管部(74)と上記曲管部(73)との間の空間(S1)に配設される
      ことを特徴とする空気調和機の室内ユニット。
    An indoor fan (27), an indoor heat exchanger (32) arranged so as to surround the indoor fan (27), and a gas connecting the indoor heat exchanger (32) and the gas communication pipe (3) A side pipe (70), a liquid side pipe (80) connecting the indoor heat exchanger (32) and the liquid communication pipe (2), and an indoor unit of an air conditioner provided on a ceiling,
    The gas side pipe (70) includes a header main body (71a) extending vertically along the side end (32a) of the indoor heat exchanger (32), and a vertical pipe section facing the header main body (71a) ( 74) and a curved pipe part (73) connecting the lower end part of the header body (71a) and the lower end part of the vertical pipe part (74),
    A part of the liquid side pipe (80) is disposed in a space (S1) between the header body (71a), the vertical pipe part (74), and the curved pipe part (73). Air conditioner indoor unit.
  2.   請求項1において、
      上記液側配管(80)には、上記室内熱交換器(32)の内側に配置される膨張弁(39)が接続されていることを特徴とする空気調和機の室内ユニット。
    In claim 1,
    An indoor unit of an air conditioner, wherein an expansion valve (39) disposed inside the indoor heat exchanger (32) is connected to the liquid side pipe (80).
  3.   請求項2において、
      上記液側配管(80)には、上記室内熱交換器(32)の外側に配置される分流器本体(81a)と、該分流器本体(81a)と該膨張弁(39)とを繋ぐ液中継管(82)とが接続され、
      上記液中継管(82)は、上記ガス側配管(70)の曲管部(73)と交差するように該曲管部(73)の上側に配設される
      ことを特徴とする空気調和機の室内ユニット。
    In claim 2,
    The liquid side pipe (80) includes a flow divider body (81a) disposed outside the indoor heat exchanger (32), and a liquid that connects the flow distributor body (81a) and the expansion valve (39). Connected to the relay pipe (82)
    The air conditioner characterized in that the liquid relay pipe (82) is disposed above the curved pipe section (73) so as to intersect the curved pipe section (73) of the gas side pipe (70). Indoor unit.
PCT/JP2014/002305 2013-04-30 2014-04-24 Indoor unit for air conditioning devices WO2014178176A1 (en)

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AU2014260980A AU2014260980B2 (en) 2013-04-30 2014-04-24 Indoor unit for air conditioning devices
CN201480010394.7A CN105008809B (en) 2013-04-30 2014-04-24 The indoor units of air conditioner
US14/780,448 US20160054010A1 (en) 2013-04-30 2014-04-24 Indoor unit for air conditioning devices
ES14791523.5T ES2662888T3 (en) 2013-04-30 2014-04-24 Indoor unit for air conditioning devices
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EP2975330B1 (en) 2018-02-21
AU2014260980A1 (en) 2015-10-22
ES2662888T3 (en) 2018-04-10
CN105008809A (en) 2015-10-28
AU2014260980B2 (en) 2016-05-26
EP2975330A4 (en) 2016-11-30
JP2014215011A (en) 2014-11-17
EP2975330A1 (en) 2016-01-20
US20160054010A1 (en) 2016-02-25
CN105008809B (en) 2018-08-10

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