EP4321811A1 - Unité extérieure - Google Patents

Unité extérieure Download PDF

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Publication number
EP4321811A1
EP4321811A1 EP22807043.9A EP22807043A EP4321811A1 EP 4321811 A1 EP4321811 A1 EP 4321811A1 EP 22807043 A EP22807043 A EP 22807043A EP 4321811 A1 EP4321811 A1 EP 4321811A1
Authority
EP
European Patent Office
Prior art keywords
control board
outdoor unit
control box
housing
isolation member
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.)
Pending
Application number
EP22807043.9A
Other languages
German (de)
English (en)
Inventor
Kunihiro HIGASHIURA
Yasuhiro Naito
Keisuke Mitoma
Takeyuki Koresawa
Kazuya NAWATA
Keisuke Masuda
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 Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems Ltd
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 Heavy Industries Thermal Systems Ltd filed Critical Mitsubishi Heavy Industries Thermal Systems Ltd
Publication of EP4321811A1 publication Critical patent/EP4321811A1/fr
Pending 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
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/22—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/46—Component arrangements in separate outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards

Definitions

  • the present disclosure relates to an outdoor unit that is used in an air conditioner.
  • An outdoor unit that is used in an air conditioner is provided with a control box that accommodates a control board having electrical components that control a compressor and the like (PTLs 1 and 2).
  • control box is provided in the vicinity of a top plate of a housing of the outdoor unit, in a case where an obstacle or the like exists above the outdoor unit, so that it is not possible to easily access the control box from above, it becomes difficult to replace a control board in the control box.
  • the present disclosure has been made in view of such circumstances, and has an object to provide an outdoor unit in which a control board in a control box can be easily replaced.
  • the present disclosure has an object to provide an outdoor unit in which it is possible to suppress a temperature rise of an electrical component provided on a control board.
  • an outdoor unit of the present disclosure includes; an outdoor fan for introducing outside air; a compressor that compresses a refrigerant; a control board provided with an electrical component that controls the outdoor fan and/or the compressor; a control box that accommodates the control board; a housing that accommodates the outdoor fan, the compressor, the control board, and the control box; and an isolation member that isolates the control box from a top plate of the housing such that a space is formed between the control box and the top plate, in which the control board is removable in a state where the isolation member is fixed to the housing side.
  • Fig. 1 shows an outdoor unit 1 according to the present embodiment.
  • the outdoor unit 1 is installed outdoors and connected to an indoor unit (not shown) through a refrigerant pipe (not shown). Air conditioning of a room is performed by the indoor unit.
  • the outdoor unit 1 includes a rectangular parallelepiped-shaped housing 3 made of sheet metal.
  • the housing 3 is provided with an outdoor fan 5 and the like.
  • the outdoor fan 5 is driven by an electric motor (not shown).
  • the housing 3 includes a mesh-like fan guard 7 provided in front of the outdoor fan 5, and a service panel 9 provided at the side (on the right side in Fig. 1 ) of the fan guard 7.
  • the housing 3 includes a back panel 10 that configures a back surface, a side panel 12 that laterally connects the back panel 10 and the service panel 9, and a top plate 11 that configures an upper surface.
  • the service panel 9 and the top plate 11 can be detachably mounted on a main body of the outdoor unit 1.
  • Fig. 2 shows a state where the service panel 9 and the top plate 11 are removed from the outdoor unit 1.
  • a compressor 13 is exposed by removing the service panel 9.
  • the compressor 13 has a tubular shape provided to be erected in a vertical direction, and includes a compression mechanism such as a scroll member or a rotary member, which is driven by an inverter-driven electric motor (not shown) accommodated inside.
  • a refrigerant compressed by the compression mechanism is led to an outdoor heat exchanger 17 or an indoor heat exchanger through a four-way valve (not shown).
  • a partition plate 15 is provided between the compressor 13 and the outdoor fan 5.
  • the partition plate 15 is made of sheet metal and is a wall body provided to be erected upward from a bottom plate 16 of the housing 3.
  • the partition plate 15 has an L-shaped cross section that covers the side and back surface of the compressor 13, as shown in Fig. 3 showing a state where the compressor 13 removed.
  • a space on the compressor 13 side (the right side in Fig. 3 ) partitioned by the partition plate 15 is a machine room R1
  • a space on the outdoor fan 5 side (the left side in Fig. 3 ) is a fan room R2.
  • the outdoor heat exchanger 17 is provided in the fan room R2.
  • the outdoor heat exchanger 17 performs heat exchange between outside air taken into the housing 3 by the outdoor fan 5 and the refrigerant flowing through a heat transfer tube (not shown), and functions as a condenser during a cooling operation and as an evaporator during a heating operation.
  • a control box 20 and an impermeable wall (isolation member) 30 are provided above the compressor 13 and above the partition plate 15.
  • the control box 20 is provided above the partition plate 15 and below the impermeable wall 30.
  • Fig. 3 shows a state where the control box 20 is removed while the partition plate 15 and the impermeable wall 30 remain.
  • the control box 20 is installed in a space between an upper end 15a of the partition plate 15 and a lower end 30f of the impermeable wall 30.
  • Fig. 4 showing a state where the impermeable wall 30 is removed, the control box 20 is provided to extend in a horizontal direction above the partition plate 15.
  • the control box 20 includes a frame body 22 that configures an outer shape, a control board 24 that is detachably fixed to the frame body 22, and a cover member 26 that covers the control board 24 from above.
  • the frame body 22 has a rectangular shape when viewed in a plan view, and is made of sheet metal.
  • the frame body 22 includes an upper frame 22a and a lower frame 22b connected to the upper frame 22a.
  • the upper frame 22a is provided with a seat portion 22a1 that comes into contact with and supports an outer peripheral edge of the control board 24.
  • a screw 23 for fixing the control board 24 can be detachably mounted on the seat portion 22a1.
  • An opening for radiation fins 22c into which radiation fins 24a of the control board 24 are inserted is formed in the upper frame 22a.
  • the shape of the opening for radiation fins 22c corresponds to an outer shape of the radiation fins 24a.
  • the radiation fins 24a are exposed below the upper frame 22a in a state of penetrating the opening for radiation fins 22c.
  • the lower frame 22b is not provided in a region where the radiation fins 24a are exposed.
  • the lower frame 22b is provided over a region on a side (a right side in Figs. 5 and 6 ) avoiding the region where the opening for radiation fins 22c is provided.
  • the lower frame 22b is provided on the machine room R1 side across the partition plate 15, and the radiation fins 24a side where the lower frame 22b is not provided is provided on the fan room R2 side across the partition plate 15.
  • a terminal block 22d is provided at the side of the frame body 22.
  • the terminal block 22d performs connection of electrical wires between the electrical components of the control board 24, and the compressor 13 and the outdoor fan 5.
  • the control board 24 controls operations of the outdoor fan 5, the compressor 13, a four-way valve (not shown), and the like.
  • the control board 24 includes the radiation fins 24a, a plate-like board main body 24b, and electrical components 24c mounted on the board main body 24b.
  • the board main body 24b is a printed board having a rectangular shape when viewed in a plan view. Screw holes (six in Fig. 6 ) 24d through which the screws 23 for fixing are inserted are formed at the periphery of the board main body 24b.
  • the control board 24 can be separated from the frame body 22 by removing the screws 23.
  • the electrical component 24c is, for example, an electronic component such as a capacitor or a CPU.
  • the electrical component 24c is provided on the lower surface of the board main body 24b.
  • the radiation fins 24a are used to remove heat generated by the CPU or the like, and a metal material having a relatively high thermal conductivity, such as an aluminum alloy, is used.
  • the radiation fins 24a are provided so as to protrude downward from the lower surface of the board main body 24b.
  • the cover member 26 is made of sheet metal and has a shape that covers the control board 24 from above.
  • the cover member 26 protects the control board 24 and also protects surrounding members from sparks generated from the control board 24.
  • the cover member 26 has a lid shape that includes a rectangular main surface 26a and a side portion 26b bent downward from each of four sides of the main surface 26a.
  • a plurality of protrusion portions 26b1 are provided on the side portion 26b.
  • Each of the protrusion portions 26b1 is fitted to a corresponding claw portion 22e provided on the upper frame 22a of the frame body 22. In this way, the cover member 26 can be easily detachably mounted on the frame body 22.
  • the impermeable wall 30 is made of sheet metal and includes a first side wall portion 30a, a second side wall portion 30b, and a third side wall portion 30c connected to form a U-shape.
  • the height of the impermeable wall 30 has a dimension for allowing a predetermined space to be secured above the control box 20. Specifically, the height is set to the extent that work can be performed when replacing the control board 24 provided in the control box 20, and is, for example, 100 mm or higher and 150 mm or lower.
  • the impermeable wall 30 is provided so as to surround the periphery of the control box 20, more specifically, the outer periphery of the control board 24.
  • An upper end of the impermeable wall 30 abuts against the lower surface of the top plate 11 (refer to Fig. 1 ) of the housing 3 through, for example, a heat insulating material. In this case, the heat insulating material may be omitted.
  • the top plate 11 and the control box 20 are isolated from each other by the impermeable wall 30, and an upper space R3 (refer to Fig. 2 ) is formed above the control box 20.
  • the upper space R3 surrounded by the impermeable wall 30 is hollow and has no devices installed therein.
  • the first side wall portion 30a is a plate-like body that is located on the front surface side of the outdoor unit 1.
  • a horizontal dimension of the first side wall portion 30a is smaller than a horizontal dimension of the control box 20.
  • an access opening 30d through which the control box 20 can be accessed is formed on the right side of the first side wall portion 30a when the service panel 9 (refer to Fig. 1 ) is removed.
  • connection piece 30a1 protruding downward is provided at the other end (a right open end) of the first side wall portion 30a.
  • the connection piece 30a1 is used at the time of connection to the partition plate 15, as shown in Fig. 8 .
  • the connection piece 30a1 and the partition plate 15 are fixed to each other by screws (not shown).
  • the second side wall portion 30b is a plate-like body connected to one end (a left end) of the first side wall portion 30a so as to be orthogonal to the one end.
  • the second side wall portion 30b extends in a depth direction of the outdoor unit 1.
  • An upper end of the second side wall portion 30b is flush with an upper end of the first side wall portion 30a.
  • the second side wall portion 30b is provided with a ventilation hole 30b1 that is a through-hole.
  • Two ventilation holes 30b1 are provided as circular holes, and are provided at the center and on a lower side in a width direction of the second side wall portion 30b.
  • the shape, position, and number of the ventilation hole 30b1 are not limited to an aspect shown in Fig. 7 .
  • the flow of a fluid from the upper space R3 (refer to Fig. 2 ) surrounded by the impermeable wall 30 toward the fan room R2 is formed by the ventilation hole 30b1. In this way, the hot air remaining in the upper space R3 can be sucked by the outdoor fan 5.
  • the third side wall portion 30c is a plate-like body connected to one end of the second side wall portion 30b so as to be orthogonal to the one end, and is located along the back surface side of the outdoor unit 1. An upper end of the third side wall portion 30c is flush with the upper end of the second side wall portion 30b. A horizontal dimension of the third side wall portion 30c is larger than the horizontal dimension of the first side wall portion 30a and larger than the horizontal dimension of the control box 20.
  • connection piece 30c1 protruding downward is provided at the other end (a right open end) of the third side wall portion 30c.
  • the connection piece 30c1 is used at the time of connection to the partition plate 15, as shown in Fig. 8 .
  • the connection piece 30c1 and the partition plate 15 are fixed to each other by screws (not shown).
  • the impermeable wall 30 is fixed to the upper portion of the partition plate 15 by the two connection pieces 30a1 and 30c1.
  • a load that is applied downward from the top plate 11 is transmitted to the partition plate 15 through the impermeable wall 30. That is, a structure is made in which a load that is applied downward from the top plate 11 is not transmitted to the control box 20.
  • connection member 32 is provided at the other end (an open end) of the third side wall portion 30c.
  • the connection member 32 connects the impermeable wall 30 to the back panel 10 of the housing 3.
  • the connection member 32 is used as a member for fixing the outdoor heat exchanger 17 (refer to Fig. 2 ), and also functions as an isolation member that isolates the control box 20 from the top plate 11.
  • a cutout is provided on the back panel 10 side at an upper end of the connection member 32, and a ventilation hole 33 is formed by this cutout.
  • the flow of a fluid from the upper space R3 (refer to Fig. 2 ) surrounded by the impermeable wall 30 toward the fan room R2 is formed by the ventilation hole 33. In this way, the hot air remaining in the upper space R3 can be sucked by the outdoor fan 5.
  • the service panel 9 (refer to Fig. 1 ) is removed.
  • the top plate 11 (refer to Fig. 1 ) may be removed as shown in Fig. 2 , and depending on work environment, work may be performed without removing the top plate 11.
  • the upper space R3 is accessed through the access opening 30d formed by the impermeable wall 30, and the cover member 26 is removed from the control box 20.
  • the removal work is performed by disengaging the protrusion portion 26b1 (refer to Fig. 6 ) of the cover member 26 from the claw portion 22e (refer to Fig. 6 ) of the frame body 22.
  • the impermeable wall 30 and the connection member 32 remain fixed to the partition plate 15 and are not removed.
  • the control board 24 is removed from the control box 20.
  • the removal work is performed by removing the screws 23 (refer to Fig. 6 ) fixed through screw holes 24d (refer to Fig. 6 ) formed in the control board 24. Also in this step, the impermeable wall 30 and the connection member 32 remain fixed to the partition plate 15 and are not removed.
  • the impermeable wall 30 is provided as an isolation member above the control box 20 so as to form the upper space R3 between the control box 20 and the top plate 11. In this way, a working space can be secured above the control box 20, and work such as replacement of the control board 24 can be facilitated. Further, the heat generated from the electrical component 24c of the control board 24 is dissipated to the upper space R3, so that a temperature rise of the electrical component 24c can be suppressed.
  • the control board 24 can be removed in a state where the impermeable wall 30 is fixed to the housing 3 side (specifically, the partition plate 15). In this way, when replacing the control board 24, the control board 24 can be removed without removing the impermeable wall 30 from the housing 3 side.
  • the upper space R3 is formed above the control box 20, that is, above the control board 24, by the impermeable wall 30, a working space when replacing the control board 24 can be secured.
  • the impermeable wall 30 includes the side wall portions 30a, 30b, and 30c provided to be erected so as to surround the periphery of the control board when viewed in a plan view, water such as rainwater entering the upper space R3 above the control board 24 can be effectively blocked.
  • the upper space R3 surrounded by the impermeable wall 30 is hollow, it can be used as a working space when replacing the control board 24.
  • the impermeable wall 30 has the access opening 30d formed on the front surface side of the housing 3 and the control board 24 can be accessed, it is possible to perform replacement of the control board 24 without accessing the control board 24 from the top plate 11 side of the housing 3.
  • the ventilation holes 30b1 and 33 communicating with the fan room R2 in which the outdoor fan 5 is provided are formed in the impermeable wall 30 and the connection member 32, so that the flow from the upper space R3 above the control board 24 toward the outdoor fan 5 is formed. In this way, it is possible to suppress a temperature rise of the control board 24.
  • the impermeable wall 30 is provided so as to receive a load between the top plate 11 and the upper portion of the partition plate 15, it is possible to improve the strength of the outdoor unit 1. Further, since the impermeable wall 30 receives a load, a large load is not applied to the control box 20, eventually, the control board 24.
  • the impermeable wall 30 is provided to avoid a path between the radiation fins 24a provided on the control board 24 and the outdoor fan. In this way, the flow of a fluid from the radiation fins 24a toward the outdoor fan 5 can be smoothly formed, so that it is possible to improve the cooling efficiency.
  • An outdoor unit (1) includes: an outdoor fan (5) for introducing outside air; a compressor (13) that compresses a refrigerant; a control board (24) provided with an electrical component (24c) that controls the outdoor fan and/or the compressor; a control box (20) that accommodates the control board; a housing (3) that accommodates the outdoor fan, the compressor, the control board, and the control box; and an isolation member (30, 32) that isolates the control box from a top plate (11) of the housing such that a space (R3) is formed between the control box and the top plate, in which the control board is removable in a state where the isolation member is fixed to the housing side.
  • the isolation member is provided above the control box so as to form a space between the control box and the top plate. In this way, a working space can be secured above the control box, and work such as replacement of the control board can be facilitated. Further, the heat generated from the electrical component of the control board is dissipated to the upper space, so that a temperature rise of the electrical component can be suppressed.
  • the control board can be removed in a state where the isolation member is fixed to the housing side. In this way, when replacing the control board, it is possible to remove the control board without removing the isolation member from the housing.
  • the isolation member includes side wall portions (30a, 30b, 30c) provided to be erected so as to surround a periphery of the control board in a case of being viewed in a plan view.
  • the isolation member includes the side wall portions provided to be erected so as to surround the periphery of the control board in a case of being viewed in a plan view, the isolation member can be used as an impermeable wall that blocks water such as rainwater entering the space above the control board.
  • the isolation member has an opening (30d) which is formed on the front surface side of the housing and through which the control board can be accessed.
  • the isolation member has the opening formed on the front surface side of the housing and the control board can be accessed through the opening, it is possible to perform replacement of the control board without accessing the control board from the top plate side of the housing.
  • the space surrounded by the side wall portions is hollow.
  • the space surrounded by the side wall portions is hollow, it can be used as a working space when replacing the control board.
  • the isolation member is formed with a ventilation hole (30b1, 33) that communicates with a space in which the outdoor fan is provided.
  • the ventilation hole that communicates with the space in which the outdoor fan is provided is formed in the isolation member, so that a flow from the space above the control board toward the outdoor fan is formed. In this way, it is possible to suppress a temperature rise of the control board.
  • a partition plate that partitions a fan room (R2) in which the outdoor fan is provided and a machine room (R1) in which the compressor is provided is provided is provided to be erected upward from a bottom portion of the housing, and the isolation member is provided so as to receive a load between the top plate and an upper portion of the partition plate.
  • the isolation member is provided so as to receive a load between the top plate and the upper portion of the partition plate, it is possible to improve the strength of the outdoor unit. Further, since the isolation member receives a load, a large load is not applied to the control box, eventually, the control board.
  • the outdoor unit further includes radiation fins (24a) fixed to the control board, in which the isolation member is provided to avoid a path between the radiation fins and the outdoor fan.
  • the radiation fins are fixed to the control board.
  • the radiation fins cool the electrical component such as a CPU provided on the board.
  • the isolation member is provided to avoid a path between the radiation fins and the outdoor fan. In this way, the flow of a fluid from the radiation fins toward the outdoor fan can be smoothly formed, so that it is possible to improve the cooling efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
EP22807043.9A 2021-05-13 2022-02-09 Unité extérieure Pending EP4321811A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021081630A JP2022175321A (ja) 2021-05-13 2021-05-13 室外機
PCT/JP2022/005197 WO2022239336A1 (fr) 2021-05-13 2022-02-09 Unité extérieure

Publications (1)

Publication Number Publication Date
EP4321811A1 true EP4321811A1 (fr) 2024-02-14

Family

ID=84029082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22807043.9A Pending EP4321811A1 (fr) 2021-05-13 2022-02-09 Unité extérieure

Country Status (4)

Country Link
EP (1) EP4321811A1 (fr)
JP (1) JP2022175321A (fr)
AU (1) AU2022274345A1 (fr)
WO (1) WO2022239336A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0352527U (fr) * 1989-09-22 1991-05-22
JP2001281286A (ja) 2000-03-30 2001-10-10 Mitsubishi Electric Corp ゲート発生回路、半導体測定装置、及び半導体測定方法
JP2009097743A (ja) * 2007-10-15 2009-05-07 Panasonic Corp 空気調和機の室外ユニット
JP2011094926A (ja) 2009-10-30 2011-05-12 Fujitsu General Ltd 空気調和機の室外機

Also Published As

Publication number Publication date
WO2022239336A1 (fr) 2022-11-17
AU2022274345A1 (en) 2023-11-30
JP2022175321A (ja) 2022-11-25

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