WO2024154170A1 - 空気調和機 - Google Patents

空気調和機 Download PDF

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Publication number
WO2024154170A1
WO2024154170A1 PCT/JP2023/000902 JP2023000902W WO2024154170A1 WO 2024154170 A1 WO2024154170 A1 WO 2024154170A1 JP 2023000902 W JP2023000902 W JP 2023000902W WO 2024154170 A1 WO2024154170 A1 WO 2024154170A1
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WO
WIPO (PCT)
Prior art keywords
ventilation
drain valve
air passage
air
drain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/000902
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
周平 横田
洋平 小柳
信洋 進
明寛 中花
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2024571432A priority Critical patent/JP7785203B2/ja
Priority to PCT/JP2023/000902 priority patent/WO2024154170A1/ja
Publication of WO2024154170A1 publication Critical patent/WO2024154170A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0041—Indoor units, e.g. fan coil units characterised by exhaustion of inside air from the room

Definitions

  • This disclosure relates to air conditioners.
  • the ventilation fan of the ventilation system outdoors.
  • the air in the ventilation pipe connecting the room to the ventilation fan is cooled by the outside air, causing condensation to form inside the ventilation pipe. If condensation accumulates inside the ventilation system, it can cause abnormal noise, so it is desirable to properly drain the condensation.
  • the present disclosure aims to provide an air conditioner that can discharge condensation water from inside the ventilation device.
  • an air conditioner includes an indoor unit installed on a wall surface inside a room and having a first heat exchanger, an outdoor unit installed outside the room and having a second heat exchanger, a refrigerant pipe that passes through a through hole in the wall separating the room from the outside and connects the first heat exchanger to the second heat exchanger, and a ventilation device that ventilates the air inside the room, the ventilation device having a ventilation pipe that passes from the room inside the room through the through hole to the outside of the room, a base that is connected to the ventilation pipe outside the room, and a ventilation fan supported by the base, the base having an air passage that connects the ventilation pipe and the ventilation fan, a base main body that is provided with a drain hole that connects the air passage with an external space, and a drain valve that can be switched between a closed state that opens the drain hole and an open state that closes the drain hole.
  • This disclosure provides an air conditioner that can discharge condensation water from inside the ventilation device.
  • FIG. 1 is a schematic diagram showing a schematic configuration of an air conditioner according to an embodiment.
  • 1 is a schematic diagram showing an installation state of an air conditioner according to an embodiment, as viewed from the side.
  • FIG. 1 is a schematic perspective view of an installation state of an air conditioner according to an embodiment.
  • FIG. FIG. 2 is an exploded view of the ventilation device main body according to the embodiment.
  • FIG. 2 is a perspective view of the base body according to the embodiment, seen obliquely from the rear.
  • FIG. 2 is an exploded view of a base body according to an embodiment.
  • FIG. 2 is a front view of a first member according to the embodiment.
  • FIG. 11 is a rear view of the second member of the embodiment.
  • FIG. 2 is a cross-sectional view of an embodiment of a base body showing a drain valve in a closed state.
  • FIG. 2 is a cross-sectional view of an embodiment of a base body showing a drain valve in an open state.
  • FIG. 2 is a perspective view of a drain valve according to an embodiment.
  • the drawings also show the X-axis, Y-axis, and Z-axis as appropriate.
  • the X-axis shows one of the horizontal directions.
  • the Y-axis shows the other of the horizontal directions.
  • the Z-axis shows the vertical direction.
  • the horizontal direction along the X-axis is called the "front-rear direction X”
  • the horizontal direction along the Y-axis is called the "left-right direction Y”
  • the vertical direction is called the "vertical direction Z”.
  • the front-rear direction X, the left-right direction Y, and the vertical direction Z are mutually perpendicular directions.
  • the side of the vertical direction Z toward which the Z-axis arrow points (+Z direction) is defined as the upper side
  • the opposite side of the vertical direction Z to the side toward which the Z-axis arrow points (-Z direction) is defined as the lower side
  • the side of the front-rear direction X toward which the X-axis arrow points (+X direction) is defined as the front
  • the opposite side of the front-rear direction X to the side toward which the X-axis arrow points (-X direction) is defined as the rear.
  • the side in the left-right direction Y toward which the Y-axis arrow points (+Y direction) is defined as the left
  • the side opposite to the side in the left-right direction Y toward which the Y-axis arrow points (-Y direction) is defined as the right.
  • Fig. 1 is a schematic diagram showing a schematic configuration of an air conditioner 100 in this embodiment.
  • the air conditioner 100 includes an outdoor unit 10, an indoor unit 20, a circulation path section (refrigerant piping) 18, and a ventilation device 30.
  • the outdoor unit 10 is disposed outside 7.
  • the indoor unit 20 is disposed inside 8.
  • the outdoor unit 10 and the indoor unit 20 are connected to each other by a circulation path section 18 through which a refrigerant 19 circulates.
  • a part of the ventilation device 30 is disposed inside 8, and the other part is disposed outside 7.
  • the ventilation device 30 exhausts air from the room 8 in which the indoor unit 20 is disposed to the outside 7.
  • the air conditioner 100 is capable of adjusting the temperature of the air in the room 8 in which the indoor unit 20 is disposed by exchanging heat between the refrigerant 19 flowing in the circulation path section 18 and the air in the room 8 in which the indoor unit 20 is disposed.
  • the refrigerant 19 include fluorine-based refrigerants or hydrocarbon-based refrigerants that have a low Global Warming Potential (GWP).
  • GWP Global Warming Potential
  • the outdoor unit 10 comprises an outdoor unit housing 11, a compressor 12, a heat exchanger 13, a flow control valve 14, a blower 15, a four-way valve 16, and a control unit 17.
  • the outdoor unit housing 11 houses the compressor 12, the heat exchanger 13, the flow control valve 14, the blower 15, the four-way valve 16, and the control unit 17.
  • the compressor 12, heat exchanger 13, flow rate control valve 14, and four-way valve 16 are provided in a portion of the circulation path 18 that is located inside the outdoor unit housing 11.
  • the compressor 12, heat exchanger 13, flow rate control valve 14, and four-way valve 16 are connected by a portion of the circulation path 18 that is located inside the outdoor unit housing 11.
  • the four-way valve 16 is provided in a portion of the circulation path section 18 that is connected to the discharge side of the compressor 12.
  • the four-way valve 16 can reverse the direction of the refrigerant 19 flowing through the circulation path section 18 by switching a portion of the path of the circulation path section 18.
  • the path connected by the four-way valve 16 is the path shown by the solid line on the four-way valve 16 in FIG. 1
  • the refrigerant 19 flows through the circulation path section 18 in the direction shown by the solid arrow in FIG. 1.
  • the path connected by the four-way valve 16 is the path shown by the dashed line on the four-way valve 16 in FIG. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the dashed arrow in FIG. 1.
  • the indoor unit 20 comprises an indoor unit housing 21, a heat exchanger 22, a blower 23 as a fan, and a control unit 24.
  • the indoor unit housing 21 houses the heat exchanger 22, the blower 23, and the control unit 24 inside.
  • the indoor unit 20 is capable of cooling operation to cool the air in the room 8 in which the indoor unit 20 is located, and heating operation to warm the air in the room 8 in which the indoor unit 20 is located.
  • the blower 23 is illustrated diagrammatically in FIG. 1.
  • the refrigerant 19 flowing in the circulation path 18 flows in the direction shown by the solid arrow in Figure 1.
  • the refrigerant 19 flowing in the circulation path 18 circulates through the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow control valve 14, and the heat exchanger 22 of the indoor unit 20, in that order, before returning to the compressor 12.
  • the heat exchanger 13 in the outdoor unit 10 functions as a condenser
  • the heat exchanger 22 in the indoor unit 20 functions as an evaporator.
  • the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the dashed line in Figure 1.
  • the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 22 of the indoor unit 20, the flow control valve 14, and the heat exchanger 13 of the outdoor unit 10, in that order, before returning to the compressor 12.
  • the heat exchanger 13 in the outdoor unit 10 functions as an evaporator
  • the heat exchanger 22 in the indoor unit 20 functions as a condenser.
  • ⁇ Indoor unit> 2 and 3 are schematic diagrams showing an installation state of the air conditioner 100 according to the embodiment.
  • the indoor unit 20 is a wall-mounted indoor unit that is fixed to an upper region of a wall surface 9a of the room 8.
  • the indoor unit 20 has a generally rectangular parallelepiped shape that is long in the left-right direction Y.
  • the blower 23 is housed in the indoor unit housing 21.
  • the blower 23 extends in the left-right direction Y.
  • the blower 23 rotates around its axis of rotation by a fan motor 23a.
  • the heat exchanger 22 is disposed inside the indoor unit housing 21, between the blower 23 and the indoor unit intake port 20a.
  • the heat exchanger 22 extends in the left-right direction Y.
  • the indoor unit housing 21 has an outer shell member 21b and an air passage member 21d.
  • the outer shell member 21b is a member that constitutes part of the outer shell of the indoor unit housing 21.
  • the outer shell member 21b improves the design of the appearance of the indoor unit 20.
  • the outer shell member 21b is a roughly rectangular box shape that opens on the wall surface 9a side. The opening of the outer shell member 21b on the wall surface 9a side is blocked by the air passage member 21d.
  • the air passage member 21d is a member that constitutes part of the air passage through which the air sucked into the indoor unit housing 21 by the blower 23 passes.
  • the air passage member 21d is hooked onto an installation plate (not shown) that is fixed to the wall surface 9a on the room 8 side. This fixes the indoor unit 20 to the wall surface 9a.
  • the indoor unit housing 21 has an indoor unit inlet 20a and an indoor unit outlet 20b.
  • the indoor unit inlet 20a and the indoor unit outlet 20b are formed in the outer shell member 21b.
  • the indoor unit inlet 20a opens upward and extends in the axial direction.
  • a filter (not shown) is disposed in the indoor unit inlet 20a.
  • the indoor unit outlet 20b opens toward the room 8 and extends in the axial direction.
  • a wind direction control vane 25 is disposed in the indoor unit outlet 20b.
  • Air from the room 8 is drawn into the indoor unit housing 21 through the indoor unit suction port 20a by the drive of the blower 23.
  • the air drawn into the indoor unit housing 21 through the indoor unit suction port 20a passes through the heat exchanger 22 and is blown out into the room 8 from the indoor unit outlet 20b.
  • the air passing through the indoor unit outlet 20b is blown by the air direction control vane 25 in the vertical direction Z and the left and right direction Y of the room 8.
  • a control unit 24 is provided inside the indoor unit housing 21.
  • the control unit 24 is disposed inside the indoor unit housing 21 at one end in the left-right direction Y.
  • the control unit 24 controls the fan motor 23a, the air direction control vane 25, the heat exchanger 22, etc.
  • the external shape of the indoor unit housing 21 is a rectangular column extending in the left-right direction Y.
  • the indoor unit housing 21 has an upper surface 21p facing upward and a lower surface 21q facing downward.
  • the indoor unit intake port 20a is provided on the upper surface 21p.
  • the indoor unit exhaust port 20b is provided on the lower surface 21q.
  • the indoor unit 20 is provided with a drain hose 20d.
  • the tip of the drain hose 20d extends to the outside 7.
  • the drain hose 20d discharges drain water that condenses on the heat exchanger 22 during cooling to the outside 7.
  • the outdoor unit 10 is disposed outdoors 7.
  • the outdoor unit housing 11 has an outdoor unit inlet 11b and an outdoor unit outlet 11a.
  • a blower 15 sends air from the outdoor unit inlet 11b side through a heat exchanger 13 (see FIG. 1) toward the outdoor unit outlet 11a, promoting heat exchange in the heat exchanger 13.
  • the outdoor unit 10 and the indoor unit 20 are connected by a circulation path section 18 and a first electrical wiring 10e.
  • the circulation path section 18 is configured in a loop shape between the outdoor unit 10 and the indoor unit 20. For this reason, the circulation path section 18 connects the outdoor unit 10 and the indoor unit 20 with a pair of pipes.
  • the first electrical wiring 10e includes a power supply line that supplies power to the outdoor unit 10 via the indoor unit 20, and a signal line for controlling the outdoor unit 10 and the indoor unit 20 in cooperation with each other.
  • the circulation path section 18 and the first electrical wiring 10e pass through a through hole 9h provided in the wall 9 that separates the indoor space 8 from the outdoor space 7. As a result, the circulation path section 18 and the first electrical wiring 10e are drawn from the indoor space 8 to the outdoor space 7.
  • the ventilation device 30 is a device that ventilates the room 8 by discharging the air from the room 8 to the outside 7, and keeps the air in the room 8 clean.
  • the ventilation device 30 may be driven in conjunction with the indoor unit 20 and the outdoor unit 10, or may be driven independently of these units.
  • the ventilation device 30 has a ventilation intake section 32, a ventilation pipe 31, and a ventilation device main body 50.
  • the ventilation intake section 32 is attached to the indoor unit 20 in the room 8.
  • the ventilation device main body 50 is installed on the wall surface 9b of the outdoor room 7.
  • the ventilation pipe 31 extends across the room 8 and the outdoor room 7.
  • the ventilation intake section 32 draws in air from the room 8.
  • the ventilation intake section 32 is provided on the surface of the indoor unit housing 21. In this embodiment, the ventilation intake section 32 is located on the underside 21q of the indoor unit housing 21.
  • the ventilation pipe 31 is a tubular pipe.
  • the ventilation pipe 31 connects the ventilation device main body 50 and the ventilation intake section 32. Therefore, one end of the ventilation pipe 31 is located inside the room 8, and the other end is located outside the room 7.
  • the ventilation pipe 31 passes through the inside of the indoor unit housing 21 and the through hole 9h in the wall 9 and is drawn out to the outside the room 7.
  • FIG. 4 is an exploded view of the ventilator main body 50.
  • the direction perpendicular to the vertical direction Z along the wall surface 9b to which the ventilation device main body 50 is attached is the left-right direction Y
  • the direction perpendicular to the wall surface 9b is the front-rear direction X.
  • the direction perpendicular to the wall surface 9b that moves away from the wall surface 9b is called the forward (+X direction)
  • the direction approaching the wall surface 9b is called the rear (-X direction).
  • the left and right are defined based on the posture of the observer facing forward (+X direction).
  • the left hand side of the observer facing the opposite side (+X direction) of the wall surface 9b is called the left side (+Y direction), and the right hand side is called the right side (-Y direction).
  • the left-right direction of the ventilation device main body 50 and the left-right direction of the outdoor unit 10 coincide with each other, but these left-right directions do not necessarily have to coincide with each other.
  • the ventilation device main body 50 has a ventilation fan 51, a duct member 52, a backflow prevention valve 53, a base 80, a joint member 75, and a case 40.
  • the base 80 is fixed to the wall surface 9b by fixing screws (not shown).
  • the base 80 supports other components of the ventilation device main body 50.
  • the ventilation pipe 31 (see FIG. 3) is connected to the base 80.
  • the base 80 has a base main body 60, an installation plate 70, and a drain valve 69.
  • the mounting plate 70 is a plate-shaped member made of sheet metal.
  • the mounting plate 70 is disposed between the base body 60 and the wall surface 9b.
  • the mounting plate 70 protects the wall surface 9b.
  • the upper end of the case 40 is engaged with the upper end 70a of the mounting plate 70.
  • the lower end 70c of the mounting plate 70 is bent forward. The lower end of the case 40 is screwed to the lower end 70c of the mounting plate 70.
  • the base body 60 is a box-shaped member, and has an air passage 60F provided therein.
  • the air passage 60F is an air flow path that connects the ventilation pipe 31 (see FIG. 3) and the ventilation fan 51.
  • the configuration of the base body 60 and the drain valve 69 attached to the base body 60 will be described in detail later.
  • the ventilation fan 51 is fixed to the base body 60 from the front (+X direction).
  • the ventilation fan 51 has a cylindrical rotor 51a centered on a central axis extending in the front-rear direction X, a fan motor 51b that rotates the rotor 51a, a fan box 51c that houses the rotor 51a and the fan motor 51b, and a terminal block 51e.
  • the ventilation fan 51 in this embodiment is a so-called sirocco fan.
  • the ventilation fan 51 sends air from the inner diameter side to the outer diameter side of the rotor 51a by rotating the rotor 51a.
  • the fan box 51c is fixed to the surface of the base body 60 facing forward (+X direction).
  • a rotor 51a and a fan motor 51b are arranged inside the fan box 51c.
  • the fan box 51c has a fan inlet (not shown) connected to the opening 62a of the base body 60, and a fan outlet 51d facing downward. As the rotor 51a rotates, the ventilation fan 51 draws air from the air passage 60F of the base body 60 at the fan inlet and blows the air downward from the fan outlet 51d.
  • the terminal block 51e supports multiple terminals (not shown) extending from the fan motor 51b. Electrical wiring (not shown) extending from the indoor unit 20 or the outdoor unit 10 is connected to these terminals.
  • the backflow suppression valve 53 is attached to the fan outlet 51d.
  • the backflow suppression valve 53 closes the fan outlet 51d.
  • the backflow suppression valve 53 is opened when the ventilation fan 51 blows air out of the fan outlet 51d.
  • the backflow suppression valve 53 prevents air from flowing back from the fan outlet 51d toward the inside of the ventilation fan 51.
  • the duct member 52 is attached to the case 40.
  • the duct member 52 is disposed directly below the fan outlet 51d.
  • the duct member 52 guides the air blown downward from the fan outlet 51d to the exhaust port 46a provided at the lower end of the case 40.
  • the case 40 is box-shaped and opens to the rear.
  • the case 40 is supported by an installation plate 70.
  • the case 40 covers each part of the ventilation device main body 50 (the base 80, the ventilation fan 51, the backflow prevention valve 53, and the duct member 52). In this way, the case 40 protects each part of the ventilation device main body 50.
  • Fig. 5 is a perspective view of the base body 60 as seen obliquely from the rear.
  • Fig. 6 is an exploded view of the base body 60. 6, the base body 60 has a first member 61 and a second member 62 that are assembled to each other in the front-rear direction X. That is, in this embodiment, the front-rear direction X corresponds to the "assembly direction.”
  • An air passage 60F is provided inside the base body 60.
  • the air passage 60F is mainly formed between the first member 61 and the second member 62.
  • the first member 61 constitutes the rear side of the base body 60 (i.e., the wall 9 side (-X direction)).
  • the second member 62 constitutes the front side of the base body 60.
  • the second member 62 supports the ventilation fan 51.
  • the base main body 60 has a box-shaped portion 63 that is rectangular when viewed from the rear, and a pipe-shaped portion 64 that is arranged to the right of the box-shaped portion 63 (-Y direction).
  • the box-shaped portion 63 and the pipe portion 64 are formed by assembling a first member 61 and a second member 62 from the front to the rear, respectively.
  • each portion of the air passage 60F is arranged inside the box-shaped portion 63 and the pipe portion 64, respectively.
  • the pipe section 64 protrudes to the right (-Y direction) from the side of the box-shaped section 63 and extends further upward.
  • the internal space of the pipe section 64 forms the upstream area of the air passage 60F.
  • the ventilation pipe 31 is connected to the pipe section 64.
  • the connection between the pipe section 64 and the ventilation pipe 31 is covered by a cylindrical joint member 75 shown in Figure 4.
  • the joint member 75 protects the connection between the pipe section 64 and the ventilation pipe 31.
  • Figure 7 is a front view of the first member 61 as seen from the front.
  • Figure 8 is a rear view of the second member 62 as seen from the rear.
  • the first member 61 has a first opposing surface 61b facing forward (+X direction), a first recess 61c and a valve accommodating recess 61k recessed rearward (-X direction) from the first opposing surface 61b, and a drainage hole 61h that penetrates the first member 61 in the vertical direction Z on the side surface of the first recess 61c and connects the first recess 61c and the valve accommodating recess 61k.
  • the first recess 61c is formed in a U-shape from the pipe portion 64 to the box-shaped portion 63.
  • the second member 62 has a second opposing surface 62b facing rearward (-X direction), a second recess 62c recessed forward (+X direction) from the second opposing surface 62b, an opening 62a penetrating forward (+X direction) from the bottom surface of the second recess 62c, and a valve accommodating hole 62k penetrating forward (+X direction) from the second opposing surface 62b.
  • the second recess 62c is formed in a U-shape from the pipe portion 64 to the box-shaped portion 63.
  • the first opposing surface 61b and the second opposing surface 62b face each other and are in contact with each other.
  • the first recess 61c and the second recess 62c overlap each other when viewed from the front-to-back direction X to form the air passage 60F.
  • the valve accommodating recess 61k and the valve accommodating hole 62k overlap each other when viewed from the front-to-back direction X to form the valve accommodating space A.
  • the valve accommodating space A is not a closed space, but a space that is connected to the external space.
  • the air passage 60F is formed in a U-shape when viewed from the front-rear direction X.
  • the air in the air passage 60F flows downward (-Z direction) from the upper end of the pipe section 64, changes direction at the lower end to the left (+Y direction) and upward (+Z direction), and then flows upward toward the opening 62a.
  • the upper end of the pipe section 64 constitutes the upstream end 60p of the air passage 60F, and the opening 62a of the second member 62 constitutes the downstream end 60q of the air passage 60F.
  • the ventilation pipe 31 (see FIG.
  • the ventilation fan 51 (see FIG. 4) is connected to the upstream end 60p of the air passage 60F, and the ventilation fan 51 (see FIG. 4) is connected to the downstream end 60q (i.e., the opening 62a) of the air passage 60F.
  • the air passage 60F connects the ventilation pipe 31 and the ventilation fan 51.
  • the opening 62a is provided with a stator vane 62f that straightens the air passing through.
  • Air passage 60F has an upstream region 60a extending downward from upstream end 60p, a downstream region 60b extending downward from downstream end 60q, and a folded region 60c connecting the lower end of upstream region 60a to the lower end of downstream region 60b.
  • the ventilation pipe 31 and the ventilation device main body 50 are arranged outside 7.
  • the heated air from inside the room 8 passes through the ventilation pipe 31 and the ventilation device main body 50.
  • the air inside the ventilation pipe 31 and the ventilation device main body 50 is cooled by the outside air, causing condensation to occur inside the ventilation pipe 31 and the ventilation device main body 50.
  • the condensed water accumulates at the lower end of the folded region 60c in the air passage 60F shown in FIG. 6. This condensed water is discharged to the outside of the air passage 60F through the drainage hole 61h.
  • FIG. 9 and 10 are both cross-sectional views of the base body 60 taken along line IX-IX in FIG.
  • the drainage hole 61h is provided in a bottom wall portion located below the air passage 60F among the walls constituting the air passage 60F of the base main body 60.
  • the drainage hole 61h extends downward from the air passage 60F to connect the air passage 60F to the outside space.
  • the upper end of the drainage hole 61h opens in the folded region 60c of the air passage 60F.
  • the upper end of the drainage hole 61h also opens upward at the lower end of the path of the air passage 60F.
  • the lower end of the drain hole 61h opens downward.
  • a valve accommodating space A is provided below the drain hole 61h.
  • the opening at the lower end of the drain hole 61h is connected to the valve accommodating space A.
  • a drain valve 69 is disposed in the valve accommodating space A.
  • FIG. 11 is a perspective view of the drain valve 69.
  • the drain valve 69 has a plate body 69a, a pair of arms 69b extending from the plate body 69a, and a pair of shafts 69c located at the tips of the arms 69b.
  • the plate body 69a is a generally rectangular plate.
  • the direction in which the long side of the plate body 69a extends is the longitudinal direction D1 of the plate body 69a
  • the direction in which the short side extends is the width direction D2 of the plate body 69a.
  • the plate body 69a is provided with a blocking surface 69f and a pair of drainage guide portions 69g.
  • the blocking surface 69f is provided on one surface of the plate body 69a.
  • the blocking surface 69f is a flat surface parallel to the direction in which the plate body 69a extends.
  • the blocking surface 69f is formed at a recessed position relative to one surface of the plate body 69a.
  • the blocking surface 69f reaches the end of one side of the plate body 69a in the longitudinal direction D1.
  • the blocking surface 69f does not reach the end of the plate body 69a on the other side in the longitudinal direction D1.
  • the plate body 69a has a step portion 69d on the other side of the blocking surface 69f in the longitudinal direction D1.
  • a regulating surface 69s, described later, is provided on the other side of the step portion 69d in the longitudinal direction D1.
  • the drainage guide portions 69g are disposed on both edges of the plate body 69a in the width direction D2 relative to the blocking surface 69f.
  • the drainage guide portions 69g extend in the longitudinal direction D1 of the plate body 69a.
  • the pair of arms 69b are connected to opposite sides of the plate body 69a in the width direction D2.
  • the arms 69b extend outward in the width direction D2 of the plate body 69a (the side away from the plate body 69a) and further extend to the other side in the longitudinal direction D1 of the plate body 69a.
  • the other side in the longitudinal direction D1 means the direction opposite to the direction in the longitudinal direction D1 of the plate body 69a where the blocking surface 69f reaches the end of the plate body 69a.
  • the pair of arms 69b are formed symmetrically to each other in the width direction D2 of the plate body 69a.
  • the shaft portion 69c extends from the other end of the arm portion 69b in the longitudinal direction D1 toward the outside in the width direction D2 of the plate body 69a.
  • the pair of shaft portions 69c are arranged coaxially.
  • the pair of shaft portions 69c are cylindrical with the rotation axis J as their center.
  • the rotation axis J is an imaginary line extending in the width direction D2 of the plate body 69a. In other words, the rotation axis J extends parallel to the blocking surface 69f.
  • recesses 62j are provided on the left-right direction Y side surfaces of the valve housing hole 62k of the second member 62.
  • the pair of recesses 62j are recessed in the left-right direction Y from the left-right direction Y side surfaces of the valve housing hole 62k, and are recessed forward (in the +X direction) from the second opposing surface 62b.
  • the recess 62j accommodates the shaft 69c of the drain valve 69.
  • the opening of the recess 62j is covered by the second opposing surface 62b of the second member 62. This prevents the shaft 69c from coming off the recess 62j.
  • the shaft 69c is rotatably supported within the recess 62j.
  • the air passage 60F is subjected to negative pressure. Accordingly, the air drain hole 61h is also subjected to negative pressure, and air flows upward through the air drain hole 61h, sucking the air drain hole 61h.
  • the air drain valve 69 rotates to one side in the circumferential direction about the rotation axis J (counterclockwise in FIG. 9) and covers the opening of the air drain hole 61h with the blocking surface 69f. That is, the air drain valve 69 in this embodiment blocks the air drain hole 61h while the ventilation fan 51 is driven.
  • the plate body 69a is disposed along a horizontal plane (X-Y plane). Also, as viewed from the axial direction of the rotation axis J, the center of gravity G of the drain valve 69 and the blocking surface 69f are disposed on the same horizontal side (rearward (-X direction) in this embodiment) with respect to the rotation axis J. Therefore, a moment is applied to the drain valve 69 in the closed state in the other circumferential direction (clockwise in FIG. 9) about the rotation axis J due to its own weight. When the ventilation fan 51 stops and the air pressure inside and outside the air passage 60F becomes equal, the drain valve 69 rotates to the other circumferential direction (clockwise in FIG.
  • drain valve 69 in this embodiment opens the drain hole 61h while the ventilation fan 51 is stopped. Condensation water generated in ventilation pipe 31 and air passage 60F accumulates at the lower end of air passage 60F. Drain valve 69 opens drain hole 61h to discharge the condensation water accumulated in air passage 60F downward from drain hole 61h.
  • Figure 10 shows the drain valve 69 in an open state.
  • the drain valve 69 switches to an open state when the amount of condensation water accumulating in the air passage 60F increases, even while the ventilation fan 51 is running.
  • the amount of condensation water accumulating in the air passage 60F exceeds a predetermined amount
  • the weight of the condensation water on the blocking surface 69f exceeds the suction force caused by the negative pressure in the air passage 60F.
  • the condensation water rotates the drain valve 69 to the other circumferential side (clockwise in FIG. 10), opening the drain hole 61h. This allows the condensation water to be discharged from the drain hole 61h.
  • a protrusion 69m is provided on the underside of the plate body 69a.
  • the protrusion 69m is provided in the region opposite the blocking surface 69f with respect to the rotation axis J in the longitudinal direction D1 of the plate body 69a.
  • the protrusion 69m increases the weight on the opposite side of the blocking surface 69f with respect to the rotation axis J, and the center of gravity G can be brought closer to the rotation axis J.
  • the drain valve 69 can be rotated to one side in the circumferential direction (counterclockwise in FIG.
  • the transition speed to the blocked state can be increased.
  • the protrusion 69m if the drain valve 69 is installed in the base body 60 in an inverted state, it will come into contact with the base body 60 and cannot be installed. In other words, the protrusion 69m also plays a role in preventing the drain valve 69 from being installed in an incorrect position.
  • the drain valve 69 in this embodiment can be switched between a closed state in which the drain hole 61h is open, and an open state in which the drain hole 61h is closed.
  • the drain valve 69 is closed when the ventilation fan 51 is driven and negative pressure is created in the air passage 60F.
  • the drain valve 69 is also opened by its own weight when the ventilation fan 51 is stopped and the pressure in the air passage 60F is equal to atmospheric pressure. Furthermore, even when the ventilation fan 51 is driven, the drain valve 69 is opened by the weight of the condensed water when the amount of condensed water stored in the air passage 60F becomes sufficiently large. In this case, the drain valve 69 is opened, and the condensed water in the air passage 60F is discharged from the drain hole 61h, and the drain valve 69 rotates again by its own weight to close the drain hole 61h.
  • the condensation water flowing out of the drainage hole 61h flows downward along the closed surface 69f and then drips onto the ground along the surface of the base body 60.
  • the condensation water is guided by the drainage guide portion 69g and the step portion 69d shown in FIG. 11 and flows along the closed surface 69f.
  • a regulating surface 69s is provided on the upper surface of the plate body 69a.
  • the regulating surface 69s is provided in an area opposite the closing surface 69f with respect to the rotation axis J in the longitudinal direction D1 of the plate body 69a.
  • the regulating surface 69s faces the other side in the circumferential direction centered on the rotation axis J (clockwise in FIG. 10).
  • the regulating surface 69s faces a stopper portion 62s provided on the base body 60 in the up-down direction.
  • the stopper portion 62s is located directly above the drain valve 69. In the closed state shown in FIG. 9, the stopper portion 62s faces the regulating surface 69s with a gap therebetween, and in the open state shown in FIG. 10, the stopper portion 62s comes into contact with the regulating surface 69s.
  • the stopper portion 62s limits the inclination angle of the drain valve 69 in the open state, and regulates the gap between the blocking surface 69f and the drain hole 61h in the open state so that it does not become too wide. As a result, when the air passage 60F becomes negative pressure, the drain valve 69 can instantly rotate due to the suction force of the air passage 60F and instantly close the drain hole 61h.
  • the inclination angle of the drain valve 69 in the open state relative to the drain valve 69 in the closed state is preferably 10° or less.
  • the movable range of the drain valve 69 centered on the rotation axis J is preferably 10° or less.
  • the plate body 69a is arranged horizontally in the closed state, and therefore in the open state, it is inclined at an angle of 10° or less from the horizontal.
  • the air conditioner 100 of this embodiment includes an indoor unit 20, an outdoor unit 10, a circulation path section (refrigerant piping) 18, and a ventilation device 30.
  • the indoor unit 20 is installed on a wall surface 9a of the room 8, and has a heat exchanger (first heat exchanger) 22.
  • the outdoor unit 10 is installed on the outdoor 7, and has a heat exchanger (second heat exchanger) 13.
  • the circulation path section 18 passes through a through hole 9h of the wall 9 that separates the room 8 from the outdoor 7, and connects the heat exchanger 22 of the indoor unit 20 to the heat exchanger 13 of the outdoor unit 10.
  • the ventilation device 30 ventilates the air in the room 8.
  • the ventilation device 30 has a ventilation pipe 31, a base 80, and a ventilation fan 51.
  • the ventilation pipe 31 is drawn from the indoor unit 20 to the outdoor 7 through the through hole 9h.
  • the base 80 is connected to the ventilation pipe 31 at the outdoor 7.
  • the ventilation fan 51 is supported by a base 80.
  • the base 80 has a base main body 60 and a drain valve 69.
  • the base main body 60 is provided with an air passage 60F and a drain hole 61h.
  • the air passage 60F connects the ventilation piping 31 and the ventilation fan 51.
  • the drain hole 61h connects the air passage 60F to the outside space.
  • the drain valve 69 is switchable between a closed state in which the drain hole 61h is open, and an open state in which the drain hole 61h is closed.
  • the ventilation fan 51 is disposed inside the ventilation device main body 50 outside the room 7, so that noise caused by the operation of the ventilation fan 51 is unlikely to be transmitted to the room 8, and the room 8 can be kept quiet.
  • condensation water is generated in the ventilation pipe 31 of the ventilation device 30 and the air passage 60F of the base 80 (see FIG. 5), and this condensation water accumulates in the air passage 60F. If the condensation water accumulates in the air passage 60F during operation, the condensation water accumulated in the air passage 60F may vibrate due to the wind flowing through the air passage 60F, causing abnormal noise.
  • the amount of condensation water stored in the air passage 60F increases, it may compress the air passage cross-sectional area of the air passage 60F and increase the air passage resistance of the air passage 60F. Furthermore, there is a concern that the condensation water in the air passage 60F may cause mold to grow.
  • the drain valve 69 can close the drain hole 61h in a closed state.
  • the drain valve 69 By closing the drain valve 69 when the ventilation fan 51 is driven, it is possible to prevent air from flowing into the air passage 60F through the drain hole 61h, and it is possible to prevent the intake efficiency of the ventilation fan 51 from decreasing due to the influence of the drain hole 61h.
  • the drain valve 69 can open the drain hole 61h in an open state.
  • the condensed water in the air passage 60F can be discharged to the outside of the air passage 60F through the drain hole 61h.
  • the air passage 60F in this embodiment is disposed upstream of the ventilation fan 51, it is possible to suppress the intrusion of the condensed water into the ventilation fan 51 by discharging the condensed water in the air passage 60F, and the reliability of the ventilation fan 51 can be improved.
  • the drain hole 61h opens downward to the external space.
  • the drain valve 69 has a plate body 69a.
  • the plate body 69a is provided with a blocking surface 69f that faces the opening of the drain hole 61h below the drain hole 61h.
  • the base body 60 supports the drain valve 69 rotatably around the rotation axis J that extends in a direction intersecting with the vertical direction Z.
  • the drain valve 69 rotates to one side in the circumferential direction about the rotation axis J (counterclockwise in FIG. 9) to cover the opening of the drain hole 61h with the blocking surface 69f.
  • the drain valve 69 rotates to the other side in the circumferential direction about the rotation axis J (clockwise in FIG. 10) to move the blocking surface 69f away from the opening of the drain hole 61h.
  • the drain valve 69 has the blocking surface 69f of the plate body 69a facing the opening of the drain hole 61h below the drain hole 61h. Therefore, when the ventilation fan 51 is driven and negative pressure is created inside the air passage 60F, the blocking surface 69f is sucked into the opening of the drain valve 69, and the drain valve 69 can be automatically switched from an open state to a closed state.
  • a ventilation device 30 can be realized that does not require a separate actuator to drive the drain valve 69.
  • a direction intersecting the vertical direction Z means a direction extending at an angle inclined to the vertical direction Z, or a direction extending perpendicularly, and does not include a direction parallel to the vertical direction Z.
  • the drain valve 69 switches between an open state and a closed state by a rotational motion about the rotation axis J. Therefore, a drain valve 69 that switches between an open state and a closed state can be configured with a simple structure, and the manufacturing costs of the ventilation device 30 can be reduced. Furthermore, by adopting a drain valve 69 that opens and closes by a rotational motion, even in the closed state, if the amount of condensed water in the air passage 60F becomes large, the weight of the condensed water can cause the drain valve 69 to transition to an open state. In other words, a drain valve 69 that automatically transitions to an open state depending on the amount of condensed water can be realized.
  • the center of gravity G of the drain valve 69 and the closed surface 69f are located on the same horizontal side of the rotation axis J (rearward (-X direction) in this embodiment) when viewed from the axial direction of the rotation axis J.
  • the drain valve 69 opens under its own weight. Therefore, when the ventilation fan 51 stops, the drain valve 69 opens the drain hole 61h under its own weight, and the condensed water in the air passage 60F can be discharged through the drain hole 61h. This prevents condensed water from remaining in the air passage 60F of the stopped ventilation device 30, and keeps the air passage 60F clean even when the ventilation device 30 is not used for a long period of time.
  • the drain valve 69 has a regulating surface 69s that faces the other side in the circumferential direction (clockwise in FIG. 10) centered on the rotation axis J.
  • the base body 60 has a stopper portion 62s that contacts the regulating surface 69s in the closed state.
  • the above-described configuration allows the stopper portion 62s to limit the opening of the drain valve 69 in the open state. This prevents the blocking surface 69f from moving too far away from the opening of the drain hole 61h when the drain valve 69 is open.
  • the drain valve 69 can be rotated by the suction force of the air passage 60F to close the drain hole 61h.
  • the drain valve 69 has a shaft portion 69c centered on the rotation axis J.
  • the base body 60 has a first member 61 and a second member 62 that are assembled in an assembly direction (front-rear direction X in this embodiment) perpendicular to the rotation axis J.
  • the second member 62 has a recess 62j that accommodates the recessed shaft portion 69c on one side in the assembly direction (front (+X direction) in this embodiment).
  • the first member 61 covers the opening of the recess 62j from the other side in the assembly direction (rear (-X direction) in this embodiment).
  • the recess 62j of the second member 62 and the first member 61 covering the opening of the recess 62j form a bearing portion that rotatably supports the shaft portion 69c. Therefore, when assembling the first member 61 and the second member 62, the shaft portion 69c of the drain valve 69 can be accommodated in the recess 62j, so that the drain valve 69 can be easily attached to the base body 60.
  • the bearing portion can be formed using only a mold whose removal direction is the assembly direction, and the base body 60 can be manufactured inexpensively.
  • the air passage 60F has an upstream region 60a extending downward from the upstream end 60p, a downstream region 60b extending downward from the downstream end 60q, and a folded region 60c connecting the lower end of the upstream region 60a to the lower end of the downstream region.
  • the drainage hole 61h opens into the folded region 60c.
  • the upper end of the drain hole 61h opens in the lowest region (the turn-back region 60c) among the regions that make up the air passage 60F, so that the condensation water that accumulates at the lower end of the air passage 60F can be efficiently discharged by the drain hole 61h.
  • the air passage 60F is bent in a U-shape between the upstream end 60p and the downstream end 60q. This makes it easier to keep the condensation water generated in the ventilation pipe 31 and the air passage 60F in the turn-back region 60c, which is the turn-back part of the air passage 60F, and prevents the condensation water from entering the inside of the ventilation fan 51 located downstream of the air passage 60F.
  • the present disclosure is not limited to the configurations of the above-mentioned embodiments.
  • the drainage holes extend vertically, but a configuration in which at least a portion of the drainage holes extend horizontally can also be adopted.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
PCT/JP2023/000902 2023-01-16 2023-01-16 空気調和機 Ceased WO2024154170A1 (ja)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05180197A (ja) * 1991-12-25 1993-07-20 Miura Co Ltd 遠心型送風機における滞留水の排水用応圧作動弁
JP2005140365A (ja) * 2003-11-05 2005-06-02 Mitsubishi Electric Corp 換気装置を具備した空気調和機
JP2007215833A (ja) * 2006-02-17 2007-08-30 Toshiba Corp 洗濯乾燥機
JP2010164205A (ja) * 2009-01-13 2010-07-29 Fujitsu General Ltd 空気調和機
JP2016075243A (ja) * 2014-10-08 2016-05-12 パナソニックＩｐマネジメント株式会社 遠心送風機

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH026914U (https=) * 1988-06-27 1990-01-17
JPH062039U (ja) * 1992-06-04 1994-01-14 株式会社コロナ 換気装置
JP3570260B2 (ja) 1998-11-16 2004-09-29 ダイキン工業株式会社 空調装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05180197A (ja) * 1991-12-25 1993-07-20 Miura Co Ltd 遠心型送風機における滞留水の排水用応圧作動弁
JP2005140365A (ja) * 2003-11-05 2005-06-02 Mitsubishi Electric Corp 換気装置を具備した空気調和機
JP2007215833A (ja) * 2006-02-17 2007-08-30 Toshiba Corp 洗濯乾燥機
JP2010164205A (ja) * 2009-01-13 2010-07-29 Fujitsu General Ltd 空気調和機
JP2016075243A (ja) * 2014-10-08 2016-05-12 パナソニックＩｐマネジメント株式会社 遠心送風機

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