WO2024053006A1 - Outdoor unit for air conditioner - Google Patents

Outdoor unit for air conditioner Download PDF

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Publication number
WO2024053006A1
WO2024053006A1 PCT/JP2022/033536 JP2022033536W WO2024053006A1 WO 2024053006 A1 WO2024053006 A1 WO 2024053006A1 JP 2022033536 W JP2022033536 W JP 2022033536W WO 2024053006 A1 WO2024053006 A1 WO 2024053006A1
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WO
WIPO (PCT)
Prior art keywords
electrode wiring
drive board
outdoor unit
negative electrode
positive electrode
Prior art date
Application number
PCT/JP2022/033536
Other languages
French (fr)
Japanese (ja)
Inventor
敬太 中野
岳秋 飯田
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2022/033536 priority Critical patent/WO2024053006A1/en
Publication of WO2024053006A1 publication Critical patent/WO2024053006A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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
    • 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

Definitions

  • the present disclosure relates to an outdoor unit of an air conditioner that performs air conditioning.
  • the outdoor unit of an air conditioner that performs air conditioning includes a compressor drive board that drives a compressor and a fan drive board that drives an outdoor fan.
  • One such outdoor unit is an outdoor unit that supplies DC power to the compressor drive board and fan drive board from a common power conversion circuit, reducing board area and board manufacturing costs. There is a chance.
  • a compressor drive board steps down a first DC voltage to generate a second DC voltage, and supplies the second DC voltage to a compressor drive circuit and a fan drive circuit. It has a shared power supply circuit that supplies power to the Thereby, the outdoor unit described in Patent Document 1 supplies the output voltage of the shared power supply circuit mounted on the compressor drive board to the fan drive board via the connection wiring.
  • Patent Document 1 an excessive surge voltage is generated on the fan drive board due to the parasitic inductance of the connection wiring that connects the compressor drive board and the fan drive board. Therefore, with the technology of Patent Document 1, it is necessary to increase the withstand voltage of various parts such as the power module and the snubber capacitor arranged on the fan drive board, and there is a problem that the manufacturing cost of the outdoor unit increases. Ta.
  • the present disclosure has been made in view of the above, and aims to provide an outdoor unit of an air conditioner that can reduce the manufacturing cost of the outdoor unit by reducing the surge voltage generated in the fan drive board. purpose.
  • the outdoor unit of the air conditioner of the present disclosure provides heat transfer between the first permanent magnet motor that drives the compressor that compresses the refrigerant, and the outside air and the refrigerant. and a second permanent magnet motor that drives a fan that blows air to the heat exchanger that performs exchange.
  • the outdoor unit of the air conditioner according to the present disclosure includes a compressor drive board that drives the first permanent magnet motor, and a fan drive board that drives the second permanent magnet motor.
  • a first positive terminal that is a positive terminal connected to a compressor drive board and a second positive terminal that is a positive terminal connected to a fan drive board are connected.
  • the positive electrode wiring and the negative electrode wiring are arranged in a first extending direction, which is the extending direction of the positive electrode wiring, which extends from the compressor drive board toward the fan drive board, and in a first extension direction, which is the extension direction of the positive electrode wire, which extends from the compressor drive board toward the fan drive board.
  • the negative electrode wiring is arranged so that the second extending direction, which is the extending direction of the provided negative electrode wiring, is parallel to the second extending direction.
  • the outdoor unit of the air conditioner according to the present disclosure has the effect that the manufacturing cost of the outdoor unit can be kept low by reducing the surge voltage generated in the fan drive board.
  • FIG. 1 is a diagram showing the configuration of an outdoor unit of an air conditioner according to the first embodiment.
  • FIG. 1 shows a circuit diagram of an outdoor unit 101 included in an air conditioner (not shown) and an AC power source 8.
  • the outdoor unit 101 includes at least two permanent magnet motors, at least one compressor drive board, and at least one fan drive board.
  • the outdoor unit 101 includes two permanent magnet motors 1 and 2, one compressor drive board 3, and one fan drive board 4.
  • the permanent magnet motor 1 is a motor that drives a compressor (not shown) that compresses refrigerant.
  • the permanent magnet motor 1 is connected to a compressor drive board 3 and is driven by the compressor drive board 3.
  • the outdoor unit 101 also includes a heat exchanger (not shown) that exchanges heat between the outside air and the refrigerant compressed by the compressor.
  • the permanent magnet motor 2 is a motor that drives a fan (not shown) that blows air to the heat exchanger.
  • the permanent magnet motor 2 is connected to the fan drive board 4 and is driven by the fan drive board 4.
  • Permanent magnet motor 1 is a first permanent magnet motor
  • permanent magnet motor 2 is a second permanent magnet motor.
  • the outdoor unit 101 also includes a positive wiring 5 that is wiring on the positive side, a negative wiring 6 that is wiring on the negative side, and a cable (PN cable) 7 that bundles the positive wiring 5 and the negative wiring 6. There is.
  • the positive wiring 5 connects a positive terminal (positive terminal 20 described later), which is a P terminal connected to the compressor drive board 3, and a positive terminal (positive terminal 22, described later) connected to the fan drive board 4. .
  • the negative electrode wiring 6 connects a negative terminal (negative terminal 21 to be described later) which is an N terminal connected to the compressor drive board 3 and a negative terminal (negative terminal 23 to be described later) to be connected to the fan drive board 4. .
  • the outdoor unit 101 of the first embodiment has a structure in which the cable 7 reduces the parasitic inductance of the positive wiring 5 and the negative wiring 6.
  • the structure of the cable 7 will be described later.
  • the compressor drive board 3 is a board that drives the permanent magnet motor 1, which is the motor of the compressor, and is connected to a single-phase or three-phase AC power source 8.
  • the compressor drive board 3 includes, for example, a rectifier circuit 9 such as a diode bridge, a reactor 10, a rush current prevention resistor 11, a rush current prevention relay 12, and a smoothing capacitor 13.
  • the rectifier circuit 9 is a circuit that rectifies the input AC voltage.
  • a circuit configured using the inrush current prevention resistor 11 and the inrush current prevention relay 12 is an inrush current prevention circuit that prevents inrush current.
  • the compressor drive board 3 includes, for example, a snubber resistor 14, a snubber capacitor 15, and an inverter circuit 16.
  • the fan drive board 4 is a board that drives the permanent magnet motor 2 that is the motor of the fan, and includes, for example, a snubber resistor 17, a snubber capacitor 18, and an inverter circuit 19.
  • the inverter circuits 16 and 19 include an IGBT (Insulated Gate Bipolar Transistor), which is a switching element, and a diode.
  • IGBT Insulated Gate Bipolar Transistor
  • the inverter circuit 16 performs PWM (Pulse Width Modulation) on the DC voltage using the IGBT to generate an AC voltage, and supplies the AC voltage to the permanent magnet motor 1 .
  • the inverter circuit 19 performs PWM on the DC voltage using the IGBT to generate an AC voltage, and supplies the AC voltage to the permanent magnet motor 2 .
  • FIG. 2 is a diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to the first embodiment.
  • the compressor drive board 3 includes a power conversion circuit 35, an inverter circuit 16, and connection lines 30 and 31.
  • the connection line 30 connects the positive side of the power conversion circuit 35 and the positive side of the inverter circuit 16, and the connection line 31 connects the negative side of the power conversion circuit 35 and the negative side of the inverter circuit 16.
  • the power conversion circuit 35 is a circuit that generates output power (DC power) from the input power (AC power) received from the AC power source 8, and is configured to include the rectifier circuit 9 and the reactor 10 described above. .
  • the fan drive board 4 has an inverter circuit 19 and connection lines 32 and 33.
  • the connection line 32 is connected to the positive side of the inverter circuit 16, and the connection line 33 is connected to the negative side of the inverter circuit 16.
  • the cable 7 has a positive wiring 5, a negative wiring 6, positive terminals 20, 22, negative terminals 21, 23, and a fixed tube 24.
  • the positive electrode wiring 5 is connected to positive electrode terminals 20 and 22 such as tab terminals
  • the negative electrode wiring 6 is connected to negative electrode terminals 21 and 23 such as tab terminals.
  • the positive electrode terminal 20 is connected to a positive electrode side connection line 30 that connects the power conversion circuit 35 and the inverter circuit 16 on the compressor drive board 3. Further, the negative electrode terminal 21 is connected to a negative electrode side connection line 31 that connects the power conversion circuit 35 and the inverter circuit 16 on the compressor drive board 3 .
  • the positive electrode terminal 22 is connected to a connection line 32 connected to the positive electrode side of the inverter circuit 19 on the fan drive board 4. Further, the negative electrode terminal 23 is connected to a connection line 33 connected to the negative electrode side of the inverter circuit 19 on the fan drive board 4 .
  • Positive terminal 20 is a first positive terminal
  • positive terminal 22 is a second positive terminal.
  • Negative terminal 21 is a first negative terminal
  • negative terminal 23 is a second negative terminal.
  • the fixed tube 24, which is a tube, is made of an insulator such as polyvinyl chloride or plastic.
  • the fixed tube 24 may be made of any insulating material.
  • the fixed tube 24 is desirably made of a material that is soft enough to facilitate connection between the compressor drive board 3 and the fan drive board 4.
  • the fixed tube 24 has a cylindrical structure.
  • the fixed tube 24 stores the positive electrode wiring 5 and the negative electrode wiring 6 inside the fixed tube 24 . That is, the fixed tube 24 bundles the positive electrode wiring 5 and the negative electrode wiring 6 and passes through the tube in the axial direction.
  • the fixed tube 24 prevents the distance between the positive electrode wiring 5 and the negative electrode wiring 6 from increasing by bundling and storing the positive electrode wiring 5 and the negative electrode wiring 6.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are passed through the fixed tube 24, so that in the cable 7, the distance between the positive electrode wiring 5 and the negative electrode wiring 6 is fixed. This prevents the tube from being separated by more than the inner diameter of the tube 24.
  • the positive electrode wiring 5 and the negative electrode wiring 6 may be in contact with each other.
  • the fixed tube 24 may be formed with a gap, a groove, a hole, or the like.
  • the fixed tube 24 may store a part of the positive electrode wiring 5 and a part of the negative electrode wiring 6 inside the fixed tube 24.
  • the fixed tube 24 stores, for example, 70% or more of the positive electrode wiring 5 and 70% or more of the negative electrode wiring 6.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are arranged in the direction in which the positive electrode wiring 5 extends from the compressor drive board 3 toward the fan drive board 4. (first extension direction) and the extension direction (second extension direction) of the negative electrode wiring 6 extending from the compressor drive board 3 toward the fan drive board 4 are arranged so that they are parallel to each other. has been done.
  • the distance between the positive electrode wiring 5 and the negative electrode wiring 6 is shortened, but currents in opposite directions flow in the positive electrode wiring 5 and the negative electrode wiring 6, and magnetic flux generated by parasitic inductance cancel each other out.
  • the outdoor unit 101 of the first embodiment has a simple structure in which the positive electrode wiring 5 and the negative electrode wiring 6 are passed through the fixed tube 24, and can prevent the distance between the positive electrode wiring 5 and the negative electrode wiring 6 from increasing. It is possible to prevent excessive surge voltage from being generated on the drive board 4.
  • the power conversion circuit 35 and the inrush current prevention circuit are mounted on the compressor drive board 3.
  • a common power conversion circuit 35 and an inrush current prevention circuit are used between the compressor drive board 3 and the fan drive board 4. This eliminates the need to arrange the power conversion circuit 35 and the rush current prevention circuit on the fan drive board 4. Therefore, the board area of the fan drive board 4 can be reduced, and the number of parts mounted on the fan drive board 4 can be reduced, so that the cost when manufacturing the fan drive board 4 can be suppressed.
  • the outdoor unit 101 the positive electrode wiring 5 connecting the compressor drive board 3 and the fan drive board 4, and the negative electrode wiring 6 connecting the compressor drive board 3 and the fan drive board 4 are bundled by the fixed tube 24. ing.
  • the outdoor unit 101 can reduce the parasitic inductance generated in the positive electrode wiring 5 and the negative electrode wiring 6, and can reduce the excessive surge voltage generated on the fan drive board 4 side. Further, since parasitic inductance can be reduced, there is no need to shorten the lengths (wiring lengths) of the positive electrode wiring 5 and the negative electrode wiring 6, and the degree of freedom in routing the positive electrode wiring 5 and the negative electrode wiring 6 is improved.
  • the positive electrode wiring 5 and the negative electrode wiring 6 that connect the compressor drive board 3 and the fan drive board 4 are bundled by the fixed tube 24, so that the fan Surge voltage generated on the drive board 4 can be reduced.
  • the outdoor unit 101 there is no need to shorten the lengths (wiring lengths) of the positive electrode wiring 5 and the negative electrode wiring 6, so that the degree of freedom in routing the wiring for reducing surge voltage is improved.
  • Embodiment 2 Next, Embodiment 2 will be described using FIG. 3.
  • the fixing band tightens the fixing tube 24, so that the positive electrode wiring 5, the negative electrode wiring 6, and the fixing tube 24 are fixed to each other.
  • FIG. 3 is a diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to the second embodiment.
  • components in FIG. 3 components that achieve the same functions as the outdoor unit 101 of Embodiment 1 shown in FIG. 2 are denoted by the same reference numerals, and redundant explanation will be omitted.
  • the outdoor unit 102 of the second embodiment includes a fixing band 25 such as a binding band, for example.
  • the fixing band 25 is made of an insulator such as polyvinyl chloride or plastic.
  • the fixing band 25 may be made of any insulating material.
  • the fixing band 25 is desirably made of a material that is soft enough to allow the fixing band 25 to easily tighten the fixing tube 24.
  • the fixing band 25 is arranged in an annular shape within a plane perpendicular to the extending direction of the fixing tube 24, and the fixing band 25 is tightened to reduce the inner diameter of the annular fixing band 25. 25 presses the outer wall surface of the fixed tube 24.
  • the fixed tube 24 is strongly fixed to the positive electrode wiring 5 and the negative electrode wiring 6.
  • the fixing band 25 can prevent the fixing tube 24 from being biased toward either the compressor drive board 3 side or the fan drive board 4 side.
  • the fixing tube 24 is preferably fixed to the positive electrode wiring 5 and the negative electrode wiring 6 at two or more locations using two or more fixing bands 25.
  • the fixing band 25 and the fixing tube 24 are combined to firmly fix the positive electrode wiring 5, the negative electrode wiring 6, and the fixing tube 24, so that displacement of the fixing tube 24 can be prevented.
  • the fixing band 25 fixes the positive electrode wiring 5, the negative electrode wiring 6, and the fixing tube 24 to each other by tightening the fixing tube 24, thereby preventing the positional shift of the fixing tube 24. It can be prevented. Therefore, the fixed band 25 can prevent the effect of reducing parasitic inductance from decreasing.
  • the fixed tube 24 is wound around a magnetic core formed using a magnetic member.
  • FIG. 4 is a diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to the third embodiment.
  • components in FIG. 4 components that achieve the same functions as the outdoor unit 101 of Embodiment 1 shown in FIG. 2 are designated by the same reference numerals, and redundant explanation will be omitted.
  • the outdoor unit 103 of the third embodiment includes a magnetic core 26 in addition to the components included in the outdoor unit 101 of the first embodiment.
  • the fixed tube 24 of the cable 7 is spirally wound around the outer wall surface of a magnetic core 26 made of, for example, ferrite.
  • the outdoor unit 103 prevents noise generated from the fan drive board 4 from propagating to the compressor drive board 3 and the AC power supply 8.
  • the number of times (number of turns) that the fixed tube 24 wraps around the magnetic core 26 may be one or multiple times. Further, the magnetic core 26 does not need to be fixed within the outdoor unit 103. In the outdoor unit 103, the fixed tube 24 is wound around the magnetic core 26, so the impedance between the positive wiring 5 and the negative wiring 6 increases. This reduces the noise that propagates through the cable 7 and flows from the fan drive board 4 to the compressor drive board 3.
  • the fixed tube 24 is spirally wound around the magnetic core 26, the electronic It is possible to prevent equipment from malfunctioning due to noise generated from the fan drive board 4.
  • the fixed tube 24 is spirally wound around the magnetic core 26, it is possible to prevent the fixed tube 24 from shifting, and to shorten the distance between the positive electrode wiring 5 and the negative electrode wiring 6. Thereby, the parasitic inductance in the positive electrode wiring 5 and the negative electrode wiring 6 and the surge voltage generated on the fan drive board 4 side can be reduced.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are housed in the fixed tube 24, and the fixed tube 24 is wound around the magnetic core 26, so that the noise reduction effect and the surge voltage suppression effect are achieved. Both will improve.
  • Embodiment 4 Next, Embodiment 4 will be described using FIG. 5.
  • the distance between the positive electrode wiring 5 and the negative electrode wiring 6 is shortened by twisting the positive electrode wiring 5 and the negative electrode wiring 6.
  • FIG. 5 is a diagram for explaining the configuration of inter-board wiring included in the outdoor unit of the air conditioner according to the fourth embodiment.
  • the inter-board wiring 40 provided in the outdoor unit 104 of the fourth embodiment is a wiring that connects the compressor drive board 3 and the fan drive board 4.
  • the outdoor unit 104 of the fourth embodiment differs from the outdoor unit 101 of the first embodiment in the structure of the positive electrode wiring 5 and the negative electrode wiring 6. In the outdoor unit 104, the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together.
  • FIG. 5 a portion of the positive electrode wiring 5 and the negative electrode wiring 6 where the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together is illustrated as an inter-board wiring 40.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are arranged in an extending direction (first extending direction) of the twisted positive electrode wiring 5 and an extending direction (second extending direction) of the twisted negative electrode wiring 6. (extension direction) are arranged parallel to each other.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together, so that the distance between the positive electrode wiring 5 and the negative electrode wiring 6 can be shortened, and the positive electrode wiring 5 and the negative electrode wiring 6 are prevented from becoming separated. can.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together in the outdoor unit 104, the magnetic fluxes generated by the parasitic inductance of the positive electrode wiring 5 and the negative electrode wiring 6 are canceled out. The effect can be improved.
  • the outdoor unit 104 has a structure in which the positive electrode wiring 5 and the negative electrode wiring 6 are not covered with the fixed tube 24 or the like, heat dissipation from the positive electrode wiring 5 and the negative electrode wiring 6 can be improved.
  • the outdoor unit 104 has a simple structure in which the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together, and can reduce the excessive surge voltage generated on the fan drive board 4. The heat dissipation of No. 6 can be improved.
  • Embodiment 5 Next, Embodiment 5 will be described using FIG. 6.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are fixed to a part of the casing of the outdoor unit (an outdoor unit casing 27 to be described later) and are arranged along the inner wall surface of the outdoor unit casing 27. be done.
  • FIG. 6 is a diagram for explaining the configuration of inter-board wiring included in the outdoor unit of the air conditioner according to the fifth embodiment.
  • the inter-board wiring 41 provided in the outdoor unit 105 of the fifth embodiment is a wiring that connects the compressor drive board 3 and the fan drive board 4.
  • the outdoor unit 105 includes an outdoor unit housing 27 (not shown in the first to fourth embodiments) in which the compressor drive board 3 and the fan drive board 4 are housed. Furthermore, compared to the outdoor unit 101 of the first embodiment, the outdoor unit 105 of the fifth embodiment includes a fixing portion 28.
  • the fixing portion 28 is formed, for example, by processing a part of the outdoor unit casing 27.
  • the fixing portion 28 is made of, for example, the same material as the outdoor unit housing 27 (a conductive member such as a sheet metal). Note that the fixing portion 28 may be formed of a member different from the outdoor unit casing 27 and then attached to the outdoor unit casing 27.
  • the fixing portion 28 is arranged on the inner side surface (inner wall surface) of the outdoor unit casing 27.
  • the fixing part 28 fixes the positive electrode wiring 5 and the negative electrode wiring 6 together to the outdoor unit casing 27.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are fixed to the fixing part 28 at at least one location. That is, in the outdoor unit 105, a part of the positive electrode wiring 5 and a part of the negative electrode wiring 6 are attached to the fixed part 28 in a bundled state (adjacent state) such that the distance between the wires is within a specific distance. Fixed. In the fixed portion 28, a part of the positive electrode wiring 5 and a part of the negative electrode wiring 6 may be in contact with each other.
  • the positive electrode wiring 5 and the negative electrode wiring 6 may be fixed at a plurality of locations by the plurality of fixing parts 28. Also in this case, at each fixing location, a part of the positive electrode wiring 5 and a part of the negative electrode wiring 6 are fixed to the fixing part 28 in a bundled state such that the distance between the wirings is within a specific distance.
  • the positive wiring 5 and the negative wiring 6 are fixed to the fixing part 28 and are arranged in a bundle along the inner side surface of the outdoor unit housing 27.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are arranged in parallel along the inner side surface of the outdoor unit housing 27 and are fixed at the fixing part 28 . That is, the positive electrode wiring 5 and the negative electrode wiring 6 are arranged so that the extending direction of the positive electrode wiring 5 (first extending direction) and the extending direction of the negative electrode wiring 6 (second extending direction) are parallel to each other. In this state, it is arranged along the inner wall surface of the outdoor unit casing 27 and is fixed at the fixing part 28 .
  • the portions of the positive wiring 5 and the negative wiring 6 that are fixed in the fixing portion 28 and the portions arranged along the inner wall surface of the outdoor unit casing 27 are illustrated as inter-board wiring 41. There is.
  • the positive wiring 5 and the negative wiring 6 are fixed and bundled to a fixing part 28 that is a part of the outdoor unit housing 27, so that the distance between the positive wiring 5 and the negative wiring 6 is reduced. You can prevent them from leaving.
  • the potential of the outdoor unit casing 27 of the outdoor unit 105 is grounded, electromagnetic noise propagating from the fan drive board 4 to the inter-board wiring 41 can be released to the outdoor unit casing 27.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are arranged along the outdoor unit housing 27, so that excessive surge voltage generated in the fan drive board 4 can be reduced, and the fan drive board 4
  • the electromagnetic noise generated from the compressor can be released to the outdoor unit casing 27, and the electromagnetic noise can be prevented from propagating to the compressor drive board 3 side and the AC power supply 8 side.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are arranged in a bundle along the inner wall surface of the outdoor unit housing 27, so that, for example, the compressor drive board 3 and the fan drive board 4 can be replaced. Improves work efficiency.
  • the positive electrode wiring 5 and the negative electrode wiring 6 are fixed to a part of the outdoor unit casing 27, and the extending direction of the positive electrode wiring 5 and the extending direction of the negative electrode wiring 6 are It has a structure in which it is arranged along the outdoor unit casing 27 in parallel with the direction.
  • the outdoor unit 105 can reduce excessive surge voltage generated in the fan drive board 4 and electromagnetic noise propagated from the fan drive board 4, and improve workability such as replacing the compressor drive board 3 and the fan drive board 4. can be improved.

Abstract

An outdoor unit (101) for an air conditioner comprises: a permanent magnet motor (1) that drives a compressor; a permanent magnet motor (2) that drives a fan for blowing air to a heat exchanger; a compressor driving substrate (3) that drives the permanent magnet motor (1); a fan driving substrate (4) that drives the permanent magnet motor (2); a positive electrode wiring (5) that connects a positive electrode terminal (20) connected to the compressor driving substrate (3) and a positive electrode terminal (22) connected to the fan driving substrate (4); and a negative electrode wiring (6) that connects a negative electrode terminal (21) that is connected to the compressor driving substrate (3) and a negative electrode terminal (23) that is connected to the fan driving substrate (4). The positive electrode wiring (5) and the negative electrode wiring (6) are arranged such that the extending direction of the positive electrode wiring (5) extending from the compressor driving substrate (3) toward the fan driving substrate (4) and the extending direction of the negative electrode wiring (6) extending from the compressor driving substrate (3) toward the fan driving substrate (4) are parallel to each other.

Description

空気調和機の室外機Air conditioner outdoor unit
　本開示は、空気調和を行う空気調和機の室外機に関する。 The present disclosure relates to an outdoor unit of an air conditioner that performs air conditioning.
　空気調和を行う空気調和機の室外機は、圧縮機を駆動する圧縮機駆動基板と、室外ファンを駆動するファン駆動基板とを備えている。このような室外機の１つに、直流電源を圧縮機駆動基板およびファン駆動基板に共通の電力変換回路から供給することで、基板面積の削減および基板の製造コストの削減を実現している室外機がある。 The outdoor unit of an air conditioner that performs air conditioning includes a compressor drive board that drives a compressor and a fan drive board that drives an outdoor fan. One such outdoor unit is an outdoor unit that supplies DC power to the compressor drive board and fan drive board from a common power conversion circuit, reducing board area and board manufacturing costs. There is a chance.
　特許文献１に記載の室外機は、圧縮機駆動基板が、第１の直流電圧を降圧して第２の直流電圧を生成し、第２の直流電圧を圧縮機用ドライブ回路およびファン用ドライブ回路に供給する共用電源回路を有している。これにより、特許文献１に記載の室外機は、圧縮機駆動基板に実装されている共用電源回路の出力電圧を、接続配線を介してファン駆動基板に供給している。 In the outdoor unit described in Patent Document 1, a compressor drive board steps down a first DC voltage to generate a second DC voltage, and supplies the second DC voltage to a compressor drive circuit and a fan drive circuit. It has a shared power supply circuit that supplies power to the Thereby, the outdoor unit described in Patent Document 1 supplies the output voltage of the shared power supply circuit mounted on the compressor drive board to the fan drive board via the connection wiring.
特開２０１７－１３３７３７号公報Japanese Patent Application Publication No. 2017-133737
　しかしながら、上記特許文献１の技術では、圧縮機駆動基板とファン駆動基板とを接続する接続配線が持つ寄生インダクタンスによって、ファン駆動基板では過大なサージ電圧が発生する。このため、上記特許文献１の技術では、ファン駆動基板に配置される、パワーモジュール、スナバコンデンサといった種々の部品に対して耐圧を上げる必要があり、室外機の製造コストが高くなるという問題があった。 However, in the technique of Patent Document 1, an excessive surge voltage is generated on the fan drive board due to the parasitic inductance of the connection wiring that connects the compressor drive board and the fan drive board. Therefore, with the technology of Patent Document 1, it is necessary to increase the withstand voltage of various parts such as the power module and the snubber capacitor arranged on the fan drive board, and there is a problem that the manufacturing cost of the outdoor unit increases. Ta.
　本開示は、上記に鑑みてなされたものであって、ファン駆動基板で発生するサージ電圧を低減することで、室外機の製造コストを低く抑えることができる空気調和機の室外機を得ることを目的とする。 The present disclosure has been made in view of the above, and aims to provide an outdoor unit of an air conditioner that can reduce the manufacturing cost of the outdoor unit by reducing the surge voltage generated in the fan drive board. purpose.
　上述した課題を解決し、目的を達成するために、本開示の空気調和機の室外機は、冷媒を圧縮する圧縮機を駆動する第１の永久磁石モータと、外気と冷媒との間で熱交換を行う熱交換器に送風するファンを駆動する第２の永久磁石モータとを備える。また、本開示の空気調和機の室外機は、第１の永久磁石モータを駆動する圧縮機駆動基板と、第２の永久磁石モータを駆動するファン駆動基板とを備える。また、本開示の空気調和機の室外機は、圧縮機駆動基板に接続される正極端子である第１の正極端子とファン駆動基板に接続される正極端子である第２の正極端子とを接続する正極配線と、圧縮機駆動基板に接続される負極端子である第１の負極端子とファン駆動基板に接続される負極端子である第２の負極端子とを接続する負極配線とを備える。正極配線および負極配線は、圧縮機駆動基板からファン駆動基板へ向かって延設される正極配線の延設方向である第１の延設方向と、圧縮機駆動基板からファン駆動基板へ向かって延設される負極配線の延設方向である第２の延設方向とが平行になるように配置されている。 In order to solve the above-mentioned problems and achieve the objectives, the outdoor unit of the air conditioner of the present disclosure provides heat transfer between the first permanent magnet motor that drives the compressor that compresses the refrigerant, and the outside air and the refrigerant. and a second permanent magnet motor that drives a fan that blows air to the heat exchanger that performs exchange. Further, the outdoor unit of the air conditioner according to the present disclosure includes a compressor drive board that drives the first permanent magnet motor, and a fan drive board that drives the second permanent magnet motor. Further, in the outdoor unit of the air conditioner of the present disclosure, a first positive terminal that is a positive terminal connected to a compressor drive board and a second positive terminal that is a positive terminal connected to a fan drive board are connected. and a negative electrode wiring that connects a first negative terminal, which is a negative terminal connected to the compressor drive board, and a second negative terminal, which is a negative terminal connected to the fan drive board. The positive electrode wiring and the negative electrode wiring are arranged in a first extending direction, which is the extending direction of the positive electrode wiring, which extends from the compressor drive board toward the fan drive board, and in a first extension direction, which is the extension direction of the positive electrode wire, which extends from the compressor drive board toward the fan drive board. The negative electrode wiring is arranged so that the second extending direction, which is the extending direction of the provided negative electrode wiring, is parallel to the second extending direction.
　本開示にかかる空気調和機の室外機は、ファン駆動基板で発生するサージ電圧を低減することで、室外機の製造コストを低く抑えることができるという効果を奏する。 The outdoor unit of the air conditioner according to the present disclosure has the effect that the manufacturing cost of the outdoor unit can be kept low by reducing the surge voltage generated in the fan drive board.
実施の形態１にかかる空気調和機の室外機の構成を示す図A diagram showing the configuration of an outdoor unit of an air conditioner according to Embodiment 1. 実施の形態１にかかる空気調和機の室外機が備えるケーブルの構成を説明するための図A diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to Embodiment 1. 実施の形態２にかかる空気調和機の室外機が備えるケーブルの構成を説明するための図A diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to Embodiment 2. 実施の形態３にかかる空気調和機の室外機が備えるケーブルの構成を説明するための図A diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to Embodiment 3. 実施の形態４にかかる空気調和機の室外機が備える基板間配線の構成を説明するための図A diagram for explaining the configuration of inter-board wiring included in the outdoor unit of the air conditioner according to Embodiment 4. 実施の形態５にかかる空気調和機の室外機が備える基板間配線の構成を説明するための図A diagram for explaining the configuration of inter-board wiring included in the outdoor unit of the air conditioner according to Embodiment 5.
　以下に、本開示の実施の形態にかかる空気調和機の室外機を図面に基づいて詳細に説明する。 Below, an outdoor unit of an air conditioner according to an embodiment of the present disclosure will be described in detail based on the drawings.
実施の形態１．
　図１は、実施の形態１にかかる空気調和機の室外機の構成を示す図である。図１では、空気調和機（図示せず）が備える室外機１０１の回路図と、交流電源８とを図示している。 Embodiment 1.
FIG. 1 is a diagram showing the configuration of an outdoor unit of an air conditioner according to the first embodiment. FIG. 1 shows a circuit diagram of an outdoor unit 101 included in an air conditioner (not shown) and an AC power source 8.
　室外機１０１は、少なくとも２台の永久磁石モータと、少なくとも１台の圧縮機駆動基板と、少なくとも１台のファン駆動基板とを備えている。実施の形態１では、室外機１０１が、２台の永久磁石モータ１，２と、１台の圧縮機駆動基板３と、１台のファン駆動基板４とを備えている場合について説明する。 The outdoor unit 101 includes at least two permanent magnet motors, at least one compressor drive board, and at least one fan drive board. In the first embodiment, a case will be described in which the outdoor unit 101 includes two permanent magnet motors 1 and 2, one compressor drive board 3, and one fan drive board 4.
　永久磁石モータ１は、冷媒を圧縮する圧縮機（図示せず）を駆動するモータである。永久磁石モータ１は、圧縮機駆動基板３に接続されており、圧縮機駆動基板３によって駆動される。また、室外機１０１は、外気と、圧縮機によって圧縮される冷媒との間で熱交換を行う熱交換器（図示せず）を備えている。 The permanent magnet motor 1 is a motor that drives a compressor (not shown) that compresses refrigerant. The permanent magnet motor 1 is connected to a compressor drive board 3 and is driven by the compressor drive board 3. The outdoor unit 101 also includes a heat exchanger (not shown) that exchanges heat between the outside air and the refrigerant compressed by the compressor.
　永久磁石モータ２は、熱交換器に送風するファン（図示せず）を駆動するモータである。永久磁石モータ２は、ファン駆動基板４に接続されており、ファン駆動基板４によって駆動される。永久磁石モータ１が、第１の永久磁石モータであり、永久磁石モータ２が、第２の永久磁石モータである。 The permanent magnet motor 2 is a motor that drives a fan (not shown) that blows air to the heat exchanger. The permanent magnet motor 2 is connected to the fan drive board 4 and is driven by the fan drive board 4. Permanent magnet motor 1 is a first permanent magnet motor, and permanent magnet motor 2 is a second permanent magnet motor.
　また、室外機１０１は、正極側の配線である正極配線５と、負極側の配線である負極配線６と、正極配線５と負極配線６とを束ねたケーブル（ＰＮケーブル）７とを備えている。 The outdoor unit 101 also includes a positive wiring 5 that is wiring on the positive side, a negative wiring 6 that is wiring on the negative side, and a cable (PN cable) 7 that bundles the positive wiring 5 and the negative wiring 6. There is.
　正極配線５は、圧縮機駆動基板３に接続されるＰ端子である正極端子（後述する正極端子２０）と、ファン駆動基板４に接続される正極端子（後述する正極端子２２）とを接続する。負極配線６は、圧縮機駆動基板３に接続されるＮ端子である負極端子（後述する負極端子２１）と、ファン駆動基板４に接続される負極端子（後述する負極端子２３）とを接続する。 The positive wiring 5 connects a positive terminal (positive terminal 20 described later), which is a P terminal connected to the compressor drive board 3, and a positive terminal (positive terminal 22, described later) connected to the fan drive board 4. . The negative electrode wiring 6 connects a negative terminal (negative terminal 21 to be described later) which is an N terminal connected to the compressor drive board 3 and a negative terminal (negative terminal 23 to be described later) to be connected to the fan drive board 4. .
　実施の形態１の室外機１０１は、ケーブル７が、正極配線５および負極配線６が持つ寄生インダクタンスを低減させる構造となっている。ケーブル７の構造については、後述する。 The outdoor unit 101 of the first embodiment has a structure in which the cable 7 reduces the parasitic inductance of the positive wiring 5 and the negative wiring 6. The structure of the cable 7 will be described later.
　圧縮機駆動基板３は、圧縮機のモータである永久磁石モータ１を駆動する基板であり、単相または三相の交流電源８に接続されている。圧縮機駆動基板３は、例えば、ダイオードブリッジ等の整流回路９と、リアクタ１０と、突入電流防止用抵抗１１と、突入電流防止用リレー１２と、平滑コンデンサ１３とを有している。 The compressor drive board 3 is a board that drives the permanent magnet motor 1, which is the motor of the compressor, and is connected to a single-phase or three-phase AC power source 8. The compressor drive board 3 includes, for example, a rectifier circuit 9 such as a diode bridge, a reactor 10, a rush current prevention resistor 11, a rush current prevention relay 12, and a smoothing capacitor 13.
　整流回路９は、入力された交流電圧を整流する回路である。突入電流防止用抵抗１１および突入電流防止用リレー１２を用いて構成された回路が、突入電流を防止する突入電流防止回路である。また、圧縮機駆動基板３は、例えば、スナバ抵抗１４と、スナバコンデンサ１５と、インバータ回路１６とを有している。 The rectifier circuit 9 is a circuit that rectifies the input AC voltage. A circuit configured using the inrush current prevention resistor 11 and the inrush current prevention relay 12 is an inrush current prevention circuit that prevents inrush current. Further, the compressor drive board 3 includes, for example, a snubber resistor 14, a snubber capacitor 15, and an inverter circuit 16.
　ファン駆動基板４は、ファンのモータである永久磁石モータ２を駆動する基板であり、ファン駆動基板４は、例えば、スナバ抵抗１７と、スナバコンデンサ１８と、インバータ回路１９とを有している。 The fan drive board 4 is a board that drives the permanent magnet motor 2 that is the motor of the fan, and includes, for example, a snubber resistor 17, a snubber capacitor 18, and an inverter circuit 19.
　インバータ回路１６，１９は、スイッチング素子であるＩＧＢＴ（Insulated　Gate　Bipolar　Transistor、絶縁ゲートバイポーラトランジスタ）と、ダイオードとを有している。 The inverter circuits 16 and 19 include an IGBT (Insulated Gate Bipolar Transistor), which is a switching element, and a diode.
　インバータ回路１６は、ＩＧＢＴによって直流電圧をＰＷＭ（Pulse　Width　Modulation、パルス幅変調）して交流電圧を生成し、交流電圧を永久磁石モータ１に供給する。インバータ回路１９は、ＩＧＢＴによって直流電圧をＰＷＭして交流電圧を生成し、交流電圧を永久磁石モータ２に供給する。 The inverter circuit 16 performs PWM (Pulse Width Modulation) on the DC voltage using the IGBT to generate an AC voltage, and supplies the AC voltage to the permanent magnet motor 1 . The inverter circuit 19 performs PWM on the DC voltage using the IGBT to generate an AC voltage, and supplies the AC voltage to the permanent magnet motor 2 .
　図２は、実施の形態１にかかる空気調和機の室外機が備えるケーブルの構成を説明するための図である。圧縮機駆動基板３は、電力変換回路３５と、インバータ回路１６と、接続線３０，３１とを有している。接続線３０は、電力変換回路３５の正極側とインバータ回路１６の正極側とを接続し、接続線３１は、電力変換回路３５の負極側とインバータ回路１６の負極側とを接続する。 FIG. 2 is a diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to the first embodiment. The compressor drive board 3 includes a power conversion circuit 35, an inverter circuit 16, and connection lines 30 and 31. The connection line 30 connects the positive side of the power conversion circuit 35 and the positive side of the inverter circuit 16, and the connection line 31 connects the negative side of the power conversion circuit 35 and the negative side of the inverter circuit 16.
　電力変換回路３５は、交流電源８から受け付けた入力電力（交流電力）から出力電力（直流電力）を生成する回路であり、前述した、整流回路９と、リアクタ１０とを含んで構成されている。 The power conversion circuit 35 is a circuit that generates output power (DC power) from the input power (AC power) received from the AC power source 8, and is configured to include the rectifier circuit 9 and the reactor 10 described above. .
　ファン駆動基板４は、インバータ回路１９と、接続線３２，３３とを有している。接続線３２は、インバータ回路１６の正極側に接続され、接続線３３は、インバータ回路１６の負極側に接続されている。 The fan drive board 4 has an inverter circuit 19 and connection lines 32 and 33. The connection line 32 is connected to the positive side of the inverter circuit 16, and the connection line 33 is connected to the negative side of the inverter circuit 16.
　なお、図２では、突入電流防止用抵抗１１、突入電流防止用リレー１２、平滑コンデンサ１３、スナバ抵抗１４、スナバコンデンサ１５、スナバ抵抗１７、およびスナバコンデンサ１８の図示を省略している。 Note that in FIG. 2, illustration of the inrush current prevention resistor 11, the inrush current prevention relay 12, the smoothing capacitor 13, the snubber resistor 14, the snubber capacitor 15, the snubber resistor 17, and the snubber capacitor 18 is omitted.
　ケーブル７は、正極配線５、負極配線６、正極端子２０，２２、負極端子２１，２３、および固定チューブ２４を有している。正極配線５は、例えばタブ端子などの正極端子２０，２２に接続され、負極配線６は、例えばタブ端子などの負極端子２１，２３に接続されている。 The cable 7 has a positive wiring 5, a negative wiring 6, positive terminals 20, 22, negative terminals 21, 23, and a fixed tube 24. The positive electrode wiring 5 is connected to positive electrode terminals 20 and 22 such as tab terminals, and the negative electrode wiring 6 is connected to negative electrode terminals 21 and 23 such as tab terminals.
　正極端子２０は、圧縮機駆動基板３上で電力変換回路３５とインバータ回路１６とを接続する正極側の接続線３０に接続されている。また、負極端子２１は、圧縮機駆動基板３上で電力変換回路３５とインバータ回路１６とを接続する負極側の接続線３１に接続されている。 The positive electrode terminal 20 is connected to a positive electrode side connection line 30 that connects the power conversion circuit 35 and the inverter circuit 16 on the compressor drive board 3. Further, the negative electrode terminal 21 is connected to a negative electrode side connection line 31 that connects the power conversion circuit 35 and the inverter circuit 16 on the compressor drive board 3 .
　正極端子２２は、ファン駆動基板４上でインバータ回路１９の正極側に接続された接続線３２に接続されている。また、負極端子２３は、ファン駆動基板４上でインバータ回路１９の負極側に接続された接続線３３に接続されている。正極端子２０が、第１の正極端子であり、正極端子２２が、第２の正極端子である。負極端子２１が、第１の負極端子であり、負極端子２３が、第２の負極端子である。 The positive electrode terminal 22 is connected to a connection line 32 connected to the positive electrode side of the inverter circuit 19 on the fan drive board 4. Further, the negative electrode terminal 23 is connected to a connection line 33 connected to the negative electrode side of the inverter circuit 19 on the fan drive board 4 . Positive terminal 20 is a first positive terminal, and positive terminal 22 is a second positive terminal. Negative terminal 21 is a first negative terminal, and negative terminal 23 is a second negative terminal.
　チューブである固定チューブ２４は、例えば、ポリ塩化ビニル、プラスチック等の絶縁体で構成されている。固定チューブ２４は、絶縁性の素材であれば、何れの素材で構成されてもよい。固定チューブ２４は、圧縮機駆動基板３とファン駆動基板４との接続を容易にすることができる程度の柔らかさを有した素材であることが望ましい。 The fixed tube 24, which is a tube, is made of an insulator such as polyvinyl chloride or plastic. The fixed tube 24 may be made of any insulating material. The fixed tube 24 is desirably made of a material that is soft enough to facilitate connection between the compressor drive board 3 and the fan drive board 4.
　固定チューブ２４は、筒状の構造を有している。固定チューブ２４は、固定チューブ２４の内部に正極配線５および負極配線６を格納している。すなわち、固定チューブ２４は、正極配線５と負極配線６とを束ねて筒状の軸方向に貫通させる。固定チューブ２４は、正極配線５および負極配線６を束ねて格納することで、正極配線５と負極配線６との間の配線間距離が広がるのを防ぐ。換言すると、ケーブル７では、固定チューブ２４の中に正極配線５と負極配線６とが通されており、これにより、ケーブル７は、正極配線５と負極配線６との間の配線間距離が固定チューブ２４の内径以上に離れることを防止する。なお、正極配線５と負極配線６とは接触してもよい。また、固定チューブ２４には、隙間、溝、穴などが形成されていてもよい。 The fixed tube 24 has a cylindrical structure. The fixed tube 24 stores the positive electrode wiring 5 and the negative electrode wiring 6 inside the fixed tube 24 . That is, the fixed tube 24 bundles the positive electrode wiring 5 and the negative electrode wiring 6 and passes through the tube in the axial direction. The fixed tube 24 prevents the distance between the positive electrode wiring 5 and the negative electrode wiring 6 from increasing by bundling and storing the positive electrode wiring 5 and the negative electrode wiring 6. In other words, in the cable 7, the positive electrode wiring 5 and the negative electrode wiring 6 are passed through the fixed tube 24, so that in the cable 7, the distance between the positive electrode wiring 5 and the negative electrode wiring 6 is fixed. This prevents the tube from being separated by more than the inner diameter of the tube 24. Note that the positive electrode wiring 5 and the negative electrode wiring 6 may be in contact with each other. Further, the fixed tube 24 may be formed with a gap, a groove, a hole, or the like.
　固定チューブ２４は、固定チューブ２４の内部に正極配線５の一部および負極配線６の一部を格納してもよい。この場合、固定チューブ２４は、例えば、正極配線５のうちの７０％以上と負極配線６のうちの７０％以上とを格納する。 The fixed tube 24 may store a part of the positive electrode wiring 5 and a part of the negative electrode wiring 6 inside the fixed tube 24. In this case, the fixed tube 24 stores, for example, 70% or more of the positive electrode wiring 5 and 70% or more of the negative electrode wiring 6.
　このように、室外機１０１では、ケーブル７が用いられることによって、正極配線５および負極配線６が、圧縮機駆動基板３からファン駆動基板４へ向かって延設される正極配線５の延設方向（第１の延設方向）と、圧縮機駆動基板３からファン駆動基板４へ向かって延設される負極配線６の延設方向（第２の延設方向）とが平行になるように配置されている。 In this way, in the outdoor unit 101, by using the cable 7, the positive electrode wiring 5 and the negative electrode wiring 6 are arranged in the direction in which the positive electrode wiring 5 extends from the compressor drive board 3 toward the fan drive board 4. (first extension direction) and the extension direction (second extension direction) of the negative electrode wiring 6 extending from the compressor drive board 3 toward the fan drive board 4 are arranged so that they are parallel to each other. has been done.
　このようなケーブル７の構成により、正極配線５と負極配線６との配線間距離が短くなるが、正極配線５および負極配線６には逆向きの電流が流れており、寄生インダクタンスによって発生する磁束が互いに打ち消しあう。 With such a configuration of the cable 7, the distance between the positive electrode wiring 5 and the negative electrode wiring 6 is shortened, but currents in opposite directions flow in the positive electrode wiring 5 and the negative electrode wiring 6, and magnetic flux generated by parasitic inductance cancel each other out.
　実施の形態１の室外機１０１は、固定チューブ２４に正極配線５および負極配線６が通された簡易な構造で、正極配線５と負極配線６との配線間距離が離れるのを防止でき、ファン駆動基板４で過大なサージ電圧が発生することを防止できる。 The outdoor unit 101 of the first embodiment has a simple structure in which the positive electrode wiring 5 and the negative electrode wiring 6 are passed through the fixed tube 24, and can prevent the distance between the positive electrode wiring 5 and the negative electrode wiring 6 from increasing. It is possible to prevent excessive surge voltage from being generated on the drive board 4.
　上述したように、室外機１０１は、圧縮機駆動基板３上に電力変換回路３５および突入電流防止回路（突入電流防止用抵抗１１、突入電流防止用リレー１２）が実装されている。そして、室外機１０１では、圧縮機駆動基板３とファン駆動基板４との間で、共通の電力変換回路３５および突入電流防止回路が用いられる。これにより、ファン駆動基板４には、電力変換回路３５および突入電流防止回路を配置する必要がなくなる。したがって、ファン駆動基板４の基板面積を削減できるとともに、ファン駆動基板４に実装する部品を削減できるので、ファン駆動基板４を製造する際のコストを抑制できる。 As described above, in the outdoor unit 101, the power conversion circuit 35 and the inrush current prevention circuit (the inrush current prevention resistor 11, the inrush current prevention relay 12) are mounted on the compressor drive board 3. In the outdoor unit 101, a common power conversion circuit 35 and an inrush current prevention circuit are used between the compressor drive board 3 and the fan drive board 4. This eliminates the need to arrange the power conversion circuit 35 and the rush current prevention circuit on the fan drive board 4. Therefore, the board area of the fan drive board 4 can be reduced, and the number of parts mounted on the fan drive board 4 can be reduced, so that the cost when manufacturing the fan drive board 4 can be suppressed.
　また、室外機１０１では、圧縮機駆動基板３およびファン駆動基板４を接続する正極配線５と、圧縮機駆動基板３およびファン駆動基板４を接続する負極配線６とが、固定チューブ２４によって束ねられている。これにより、室外機１０１は、正極配線５および負極配線６に生じる寄生インダクタンスを低減することができ、ファン駆動基板４側で発生する過大なサージ電圧を低減できる。また、寄生インダクタンスを低減することができるので、正極配線５および負極配線６の長さ（配線長）を短くする必要がなく、正極配線５および負極配線６の取り回しの自由度が向上する。 Further, in the outdoor unit 101, the positive electrode wiring 5 connecting the compressor drive board 3 and the fan drive board 4, and the negative electrode wiring 6 connecting the compressor drive board 3 and the fan drive board 4 are bundled by the fixed tube 24. ing. Thereby, the outdoor unit 101 can reduce the parasitic inductance generated in the positive electrode wiring 5 and the negative electrode wiring 6, and can reduce the excessive surge voltage generated on the fan drive board 4 side. Further, since parasitic inductance can be reduced, there is no need to shorten the lengths (wiring lengths) of the positive electrode wiring 5 and the negative electrode wiring 6, and the degree of freedom in routing the positive electrode wiring 5 and the negative electrode wiring 6 is improved.
　このように、実施の形態１によれば、室外機１０１において、圧縮機駆動基板３とファン駆動基板４とを接続する正極配線５および負極配線６が固定チューブ２４によって束ねられているので、ファン駆動基板４で発生するサージ電圧を低減することができる。これにより、ファン駆動基板４に配置される、パワーモジュール（インバータ回路１９）、スナバコンデンサ１８といった部品に対して耐圧を上げる必要がなくなるので、室外機１０１の製造コストを低く抑えることができる。また、室外機１０１では、正極配線５および負極配線６の長さ（配線長）を短くする必要がないので、サージ電圧を低減するための配線の取り回しの自由度が向上する。 As described above, according to the first embodiment, in the outdoor unit 101, the positive electrode wiring 5 and the negative electrode wiring 6 that connect the compressor drive board 3 and the fan drive board 4 are bundled by the fixed tube 24, so that the fan Surge voltage generated on the drive board 4 can be reduced. This eliminates the need to increase the withstand voltage of components such as the power module (inverter circuit 19) and snubber capacitor 18 arranged on the fan drive board 4, so the manufacturing cost of the outdoor unit 101 can be kept low. Furthermore, in the outdoor unit 101, there is no need to shorten the lengths (wiring lengths) of the positive electrode wiring 5 and the negative electrode wiring 6, so that the degree of freedom in routing the wiring for reducing surge voltage is improved.
実施の形態２．
　つぎに、図３を用いて実施の形態２について説明する。実施の形態２では、固定バンドが固定チューブ２４を締め付けることよって、正極配線５と負極配線６と固定チューブ２４とが互いに固定される。 Embodiment 2.
Next, Embodiment 2 will be described using FIG. 3. In the second embodiment, the fixing band tightens the fixing tube 24, so that the positive electrode wiring 5, the negative electrode wiring 6, and the fixing tube 24 are fixed to each other.
　図３は、実施の形態２にかかる空気調和機の室外機が備えるケーブルの構成を説明するための図である。図３の各構成要素のうち図２に示す実施の形態１の室外機１０１と同一機能を達成する構成要素については同一符号を付しており、重複する説明は省略する。 FIG. 3 is a diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to the second embodiment. Among the components in FIG. 3, components that achieve the same functions as the outdoor unit 101 of Embodiment 1 shown in FIG. 2 are denoted by the same reference numerals, and redundant explanation will be omitted.
　実施の形態２の室外機１０２は、実施の形態１の室外機１０１が備える構成要素に加えて、例えば結束バンドのような固定バンド２５を備えている。固定バンド２５は、例えば、ポリ塩化ビニル、プラスチック等の絶縁体で構成されている。固定バンド２５は、絶縁性の素材であれば、何れの素材で構成されてもよい。固定バンド２５は、固定バンド２５が固定チューブ２４の締め付けを容易にすることができる程度の柔らかさを有した素材であることが望ましい。 In addition to the components included in the outdoor unit 101 of the first embodiment, the outdoor unit 102 of the second embodiment includes a fixing band 25 such as a binding band, for example. The fixing band 25 is made of an insulator such as polyvinyl chloride or plastic. The fixing band 25 may be made of any insulating material. The fixing band 25 is desirably made of a material that is soft enough to allow the fixing band 25 to easily tighten the fixing tube 24.
　室外機１０２では、固定チューブ２４の少なくとも１箇所が、固定バンド２５によって固定チューブ２４の外側から固定チューブ２４の中心軸に向かって締め付けられている。すなわち、固定バンド２５は、固定チューブ２４の延設方向に垂直な面内で円環状に配置され、円環状の固定バンド２５の内径を小さくするように固定バンド２５が締められることで、固定バンド２５が固定チューブ２４の外壁面を押圧する。これにより、固定チューブ２４が、正極配線５および負極配線６に強く固定される。この結果、固定バンド２５は、固定チューブ２４が圧縮機駆動基板３側またはファン駆動基板４側の一方に偏ることを防止できる。 In the outdoor unit 102, at least one portion of the fixed tube 24 is tightened by a fixed band 25 from the outside of the fixed tube 24 toward the central axis of the fixed tube 24. That is, the fixing band 25 is arranged in an annular shape within a plane perpendicular to the extending direction of the fixing tube 24, and the fixing band 25 is tightened to reduce the inner diameter of the annular fixing band 25. 25 presses the outer wall surface of the fixed tube 24. Thereby, the fixed tube 24 is strongly fixed to the positive electrode wiring 5 and the negative electrode wiring 6. As a result, the fixing band 25 can prevent the fixing tube 24 from being biased toward either the compressor drive board 3 side or the fan drive board 4 side.
　なお、固定チューブ２４は、２つ以上の固定バンド２５によって２箇所以上で、正極配線５および負極配線６に固定されることが望ましい。 Note that the fixing tube 24 is preferably fixed to the positive electrode wiring 5 and the negative electrode wiring 6 at two or more locations using two or more fixing bands 25.
　固定チューブ２４が圧縮機駆動基板３またはファン駆動基板４の何れか一方の基板側に寄った場合、固定チューブ２４を通過しない配線（正極配線５、負極配線６）の距離が長くなるので、例えば、配線が撓むなどの不具合が生じる。この場合、正極配線５と負極配線６との配線間距離が増加し、ケーブル７の寄生インダクタンスを低減する効果が低下する。実施の形態２では、固定バンド２５と固定チューブ２４とを組み合わせ、正極配線５と負極配線６と固定チューブ２４とを強く固定しているので、固定チューブ２４の位置ずれを防止できる。 If the fixed tube 24 is closer to either the compressor drive board 3 or the fan drive board 4, the distance of the wiring (positive electrode wiring 5, negative electrode wiring 6) that does not pass through the fixed tube 24 becomes longer, so for example, , problems such as bending of the wiring may occur. In this case, the distance between the positive electrode wiring 5 and the negative electrode wiring 6 increases, and the effect of reducing the parasitic inductance of the cable 7 decreases. In the second embodiment, the fixing band 25 and the fixing tube 24 are combined to firmly fix the positive electrode wiring 5, the negative electrode wiring 6, and the fixing tube 24, so that displacement of the fixing tube 24 can be prevented.
　このように、実施の形態２によれば、固定バンド２５が、固定チューブ２４を締め付けることによって、正極配線５と負極配線６と固定チューブ２４とを互いに固定するので、固定チューブ２４の位置ずれを防止できる。したがって、固定バンド２５は、寄生インダクタンスを低減する効果が低下することを防止できる。 As described above, according to the second embodiment, the fixing band 25 fixes the positive electrode wiring 5, the negative electrode wiring 6, and the fixing tube 24 to each other by tightening the fixing tube 24, thereby preventing the positional shift of the fixing tube 24. It can be prevented. Therefore, the fixed band 25 can prevent the effect of reducing parasitic inductance from decreasing.
実施の形態３．
　つぎに、図４を用いて実施の形態３について説明する。実施の形態３では、固定チューブ２４が、磁性体の部材を用いて形成された磁性体コアに巻き付けられる。 Embodiment 3.
Next, Embodiment 3 will be described using FIG. 4. In the third embodiment, the fixed tube 24 is wound around a magnetic core formed using a magnetic member.
　図４は、実施の形態３にかかる空気調和機の室外機が備えるケーブルの構成を説明するための図である。図４の各構成要素のうち図２に示す実施の形態１の室外機１０１と同一機能を達成する構成要素については同一符号を付しており、重複する説明は省略する。 FIG. 4 is a diagram for explaining the configuration of a cable included in the outdoor unit of the air conditioner according to the third embodiment. Among the components in FIG. 4, components that achieve the same functions as the outdoor unit 101 of Embodiment 1 shown in FIG. 2 are designated by the same reference numerals, and redundant explanation will be omitted.
　実施の形態３の室外機１０３は、実施の形態１の室外機１０１が備える構成要素に加えて、磁性体コア２６を備えている。室外機１０３では、ケーブル７の固定チューブ２４が、例えばフェライトからなる磁性体コア２６の外壁面を螺旋状に巻いている。これにより、室外機１０３は、ファン駆動基板４から発生するノイズが圧縮機駆動基板３および交流電源８に伝搬することを防止する。 The outdoor unit 103 of the third embodiment includes a magnetic core 26 in addition to the components included in the outdoor unit 101 of the first embodiment. In the outdoor unit 103, the fixed tube 24 of the cable 7 is spirally wound around the outer wall surface of a magnetic core 26 made of, for example, ferrite. Thereby, the outdoor unit 103 prevents noise generated from the fan drive board 4 from propagating to the compressor drive board 3 and the AC power supply 8.
　なお、固定チューブ２４が、磁性体コア２６を巻く回数（巻き数）は、１回であってもよいし複数回であってもよい。また、磁性体コア２６は、室外機１０３内で固定されている必要はない。室外機１０３では、固定チューブ２４が磁性体コア２６に巻き付けられているので、正極配線５と負極配線６とのインピーダンスが増加する。これにより、ケーブル７を伝搬してファン駆動基板４から圧縮機駆動基板３に流れるノイズが減少する。 Note that the number of times (number of turns) that the fixed tube 24 wraps around the magnetic core 26 may be one or multiple times. Further, the magnetic core 26 does not need to be fixed within the outdoor unit 103. In the outdoor unit 103, the fixed tube 24 is wound around the magnetic core 26, so the impedance between the positive wiring 5 and the negative wiring 6 increases. This reduces the noise that propagates through the cable 7 and flows from the fan drive board 4 to the compressor drive board 3.
　このように、実施の形態３によれば、固定チューブ２４が磁性体コア２６に螺旋状に巻かれているので、圧縮機駆動基板３、または室外機１０３と共通の電源系統に接続される電子機器が、ファン駆動基板４から発生するノイズによって誤動作を起こすことを防止できる。 As described above, according to the third embodiment, since the fixed tube 24 is spirally wound around the magnetic core 26, the electronic It is possible to prevent equipment from malfunctioning due to noise generated from the fan drive board 4.
　さらに、固定チューブ２４が磁性体コア２６に螺旋状に巻かれているので、固定チューブ２４の位置ずれを防止できるとともに、正極配線５と負極配線６との配線間距離を短くできる。これにより、正極配線５および負極配線６における寄生インダクタンス、およびファン駆動基板４側で発生するサージ電圧を低減することができる。 Furthermore, since the fixed tube 24 is spirally wound around the magnetic core 26, it is possible to prevent the fixed tube 24 from shifting, and to shorten the distance between the positive electrode wiring 5 and the negative electrode wiring 6. Thereby, the parasitic inductance in the positive electrode wiring 5 and the negative electrode wiring 6 and the surge voltage generated on the fan drive board 4 side can be reduced.
　このように、室外機１０３では、正極配線５および負極配線６が固定チューブ２４内に格納され、固定チューブ２４が磁性体コア２６に巻き付けられているので、ノイズ低減効果とサージ電圧の抑制効果との両方が向上する。 In this way, in the outdoor unit 103, the positive electrode wiring 5 and the negative electrode wiring 6 are housed in the fixed tube 24, and the fixed tube 24 is wound around the magnetic core 26, so that the noise reduction effect and the surge voltage suppression effect are achieved. Both will improve.
実施の形態４．
　つぎに、図５を用いて実施の形態４について説明する。実施の形態４では、正極配線５および負極配線６が撚り合わせられることで、正極配線５と負極配線６との配線間距離を短くする。 Embodiment 4.
Next, Embodiment 4 will be described using FIG. 5. In the fourth embodiment, the distance between the positive electrode wiring 5 and the negative electrode wiring 6 is shortened by twisting the positive electrode wiring 5 and the negative electrode wiring 6.
　図５は、実施の形態４にかかる空気調和機の室外機が備える基板間配線の構成を説明するための図である。図５の各構成要素のうち図２に示す実施の形態１の室外機１０１と同一機能を達成する構成要素については同一符号を付しており、重複する説明は省略する。実施の形態４の室外機１０４が備える基板間配線４０は、圧縮機駆動基板３とファン駆動基板４とを接続する配線である。 FIG. 5 is a diagram for explaining the configuration of inter-board wiring included in the outdoor unit of the air conditioner according to the fourth embodiment. Among the components in FIG. 5, the components that achieve the same functions as the outdoor unit 101 of the first embodiment shown in FIG. 2 are designated by the same reference numerals, and redundant explanation will be omitted. The inter-board wiring 40 provided in the outdoor unit 104 of the fourth embodiment is a wiring that connects the compressor drive board 3 and the fan drive board 4.
　実施の形態４の室外機１０４は、実施の形態１の室外機１０１と比較して、正極配線５および負極配線６の構造が異なる。室外機１０４では、正極配線５と負極配線６とが、撚り合わせられている。 The outdoor unit 104 of the fourth embodiment differs from the outdoor unit 101 of the first embodiment in the structure of the positive electrode wiring 5 and the negative electrode wiring 6. In the outdoor unit 104, the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together.
　図５では、正極配線５および負極配線６のうち、正極配線５と負極配線６とが、撚り合わせられている箇所を基板間配線４０として図示している。室外機１０４では、正極配線５および負極配線６は、撚り合わせられた正極配線５の延設方向（第１の延設方向）と、撚り合わせられた負極配線６の延設方向（第２の延設方向）とが平行になるように配置されている。 In FIG. 5, a portion of the positive electrode wiring 5 and the negative electrode wiring 6 where the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together is illustrated as an inter-board wiring 40. In the outdoor unit 104, the positive electrode wiring 5 and the negative electrode wiring 6 are arranged in an extending direction (first extending direction) of the twisted positive electrode wiring 5 and an extending direction (second extending direction) of the twisted negative electrode wiring 6. (extension direction) are arranged parallel to each other.
　室外機１０４では、正極配線５と負極配線６とが撚り合わせられることで、正極配線５と負極配線６との配線間距離を短くできるとともに、正極配線５と負極配線６とが離れることを防止できる。 In the outdoor unit 104, the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together, so that the distance between the positive electrode wiring 5 and the negative electrode wiring 6 can be shortened, and the positive electrode wiring 5 and the negative electrode wiring 6 are prevented from becoming separated. can.
　このように、実施の形態４によれば、室外機１０４は、正極配線５と負極配線６とが撚り合わせられているので、正極配線５および負極配線６の寄生インダクタンスによって発生する磁束を打ち消しあう効果を向上させることができる。 As described above, according to the fourth embodiment, since the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together in the outdoor unit 104, the magnetic fluxes generated by the parasitic inductance of the positive electrode wiring 5 and the negative electrode wiring 6 are canceled out. The effect can be improved.
　また、室外機１０４は、固定チューブ２４等で正極配線５および負極配線６を覆わない構造であるので、正極配線５および負極配線６からの放熱性を向上させることができる。このように、室外機１０４は、正極配線５および負極配線６を撚り合わせるという簡易な構造で、ファン駆動基板４に発生する過大なサージ電圧を低減することができるとともに、正極配線５および負極配線６の放熱性を向上させることができる。 Furthermore, since the outdoor unit 104 has a structure in which the positive electrode wiring 5 and the negative electrode wiring 6 are not covered with the fixed tube 24 or the like, heat dissipation from the positive electrode wiring 5 and the negative electrode wiring 6 can be improved. In this way, the outdoor unit 104 has a simple structure in which the positive electrode wiring 5 and the negative electrode wiring 6 are twisted together, and can reduce the excessive surge voltage generated on the fan drive board 4. The heat dissipation of No. 6 can be improved.
実施の形態５．
　つぎに、図６を用いて実施の形態５について説明する。実施の形態５では、正極配線５と負極配線６とが、室外機の筐体（後述する室外機筐体２７）の一部に固定されるとともに室外機筐体２７の内壁面に沿って配置される。 Embodiment 5.
Next, Embodiment 5 will be described using FIG. 6. In the fifth embodiment, the positive electrode wiring 5 and the negative electrode wiring 6 are fixed to a part of the casing of the outdoor unit (an outdoor unit casing 27 to be described later) and are arranged along the inner wall surface of the outdoor unit casing 27. be done.
　図６は、実施の形態５にかかる空気調和機の室外機が備える基板間配線の構成を説明するための図である。図６の各構成要素のうち図２に示す実施の形態１の室外機１０１と同一機能を達成する構成要素については同一符号を付しており、重複する説明は省略する。実施の形態５の室外機１０５が備える基板間配線４１は、圧縮機駆動基板３とファン駆動基板４とを接続する配線である。 FIG. 6 is a diagram for explaining the configuration of inter-board wiring included in the outdoor unit of the air conditioner according to the fifth embodiment. Among the components in FIG. 6, the components that achieve the same functions as the outdoor unit 101 of the first embodiment shown in FIG. 2 are denoted by the same reference numerals, and redundant explanation will be omitted. The inter-board wiring 41 provided in the outdoor unit 105 of the fifth embodiment is a wiring that connects the compressor drive board 3 and the fan drive board 4.
　室外機１０５は、圧縮機駆動基板３およびファン駆動基板４が格納される室外機筐体２７（実施の形態１～４では図示せず）を備えている。また、実施の形態５の室外機１０５は、実施の形態１の室外機１０１と比較して、固定部２８を備えている。固定部２８は、例えば、室外機筐体２７の一部が加工されることによって形成されている。固定部２８は、例えば、室外機筐体２７と同様の素材（板金などの導電性部材）で形成されている。なお、固定部２８は、室外機筐体２７とは別の部材で形成された後に、室外機筐体２７に取り付けられてもよい。固定部２８は、室外機筐体２７の内側の側面（内壁面）などに配置されている。 The outdoor unit 105 includes an outdoor unit housing 27 (not shown in the first to fourth embodiments) in which the compressor drive board 3 and the fan drive board 4 are housed. Furthermore, compared to the outdoor unit 101 of the first embodiment, the outdoor unit 105 of the fifth embodiment includes a fixing portion 28. The fixing portion 28 is formed, for example, by processing a part of the outdoor unit casing 27. The fixing portion 28 is made of, for example, the same material as the outdoor unit housing 27 (a conductive member such as a sheet metal). Note that the fixing portion 28 may be formed of a member different from the outdoor unit casing 27 and then attached to the outdoor unit casing 27. The fixing portion 28 is arranged on the inner side surface (inner wall surface) of the outdoor unit casing 27.
　固定部２８は、室外機筐体２７に正極配線５と負極配線６とをまとめて固定する。室外機１０５では、正極配線５および負極配線６が、少なくとも１箇所で固定部２８に固定されている。すなわち、室外機１０５では、正極配線５の一部と負極配線６の一部とが、配線間距離が特定距離内となるように束ねられた状態（隣接させられた状態）で固定部２８に固定される。固定部２８では、正極配線５の一部と負極配線６の一部とが接触していてもよい。 The fixing part 28 fixes the positive electrode wiring 5 and the negative electrode wiring 6 together to the outdoor unit casing 27. In the outdoor unit 105, the positive electrode wiring 5 and the negative electrode wiring 6 are fixed to the fixing part 28 at at least one location. That is, in the outdoor unit 105, a part of the positive electrode wiring 5 and a part of the negative electrode wiring 6 are attached to the fixed part 28 in a bundled state (adjacent state) such that the distance between the wires is within a specific distance. Fixed. In the fixed portion 28, a part of the positive electrode wiring 5 and a part of the negative electrode wiring 6 may be in contact with each other.
　なお、室外機１０５が、複数の固定部２８を備えている場合、正極配線５および負極配線６は、複数の固定部２８によって複数箇所で固定されてもよい。この場合も、各固定箇所では、正極配線５の一部と負極配線６の一部とが、配線間距離が特定距離内となるように束ねられた状態で固定部２８に固定される。 Note that when the outdoor unit 105 includes a plurality of fixing parts 28, the positive electrode wiring 5 and the negative electrode wiring 6 may be fixed at a plurality of locations by the plurality of fixing parts 28. Also in this case, at each fixing location, a part of the positive electrode wiring 5 and a part of the negative electrode wiring 6 are fixed to the fixing part 28 in a bundled state such that the distance between the wirings is within a specific distance.
　室外機１０５では、正極配線５および負極配線６が、固定部２８に固定されるとともに、室外機筐体２７の内側の側面に沿って束ねて配置されている。具体的には、正極配線５および負極配線６は、室外機筐体２７の内側の側面に沿って平行に配置されるとともに、固定部２８において固定されている。すなわち、正極配線５および負極配線６は、正極配線５の延設方向（第１の延設方向）と負極配線６の延設方向（第２の延設方向）とが平行になるように配置された状態で、室外機筐体２７の内壁面に沿って配置されるとともに、固定部２８において固定されている。図６では、正極配線５および負極配線６のうち、固定部２８において固定されている箇所、および室外機筐体２７の内壁面に沿って配置されている箇所を基板間配線４１として図示している。 In the outdoor unit 105, the positive wiring 5 and the negative wiring 6 are fixed to the fixing part 28 and are arranged in a bundle along the inner side surface of the outdoor unit housing 27. Specifically, the positive electrode wiring 5 and the negative electrode wiring 6 are arranged in parallel along the inner side surface of the outdoor unit housing 27 and are fixed at the fixing part 28 . That is, the positive electrode wiring 5 and the negative electrode wiring 6 are arranged so that the extending direction of the positive electrode wiring 5 (first extending direction) and the extending direction of the negative electrode wiring 6 (second extending direction) are parallel to each other. In this state, it is arranged along the inner wall surface of the outdoor unit casing 27 and is fixed at the fixing part 28 . In FIG. 6 , the portions of the positive wiring 5 and the negative wiring 6 that are fixed in the fixing portion 28 and the portions arranged along the inner wall surface of the outdoor unit casing 27 are illustrated as inter-board wiring 41. There is.
　室外機１０５は、正極配線５と負極配線６とが、室外機筐体２７の一部である固定部２８に固定されて束ねられることで、正極配線５と負極配線６との配線間距離が離れることを防止できる。 In the outdoor unit 105, the positive wiring 5 and the negative wiring 6 are fixed and bundled to a fixing part 28 that is a part of the outdoor unit housing 27, so that the distance between the positive wiring 5 and the negative wiring 6 is reduced. You can prevent them from leaving.
　また、室外機１０５は、室外機筐体２７の電位が接地されているので、ファン駆動基板４から基板間配線４１に伝搬する電磁ノイズを室外機筐体２７に逃がすことができる。このように、室外機１０５は、正極配線５と負極配線６とを室外機筐体２７に沿わせているので、ファン駆動基板４で発生する過大なサージ電圧を低減できるとともに、ファン駆動基板４から発生する電磁ノイズを室外機筐体２７に逃がすことができ、電磁ノイズを圧縮機駆動基板３側および交流電源８側に伝搬することを防止できる。 Furthermore, since the potential of the outdoor unit casing 27 of the outdoor unit 105 is grounded, electromagnetic noise propagating from the fan drive board 4 to the inter-board wiring 41 can be released to the outdoor unit casing 27. In this way, in the outdoor unit 105, the positive electrode wiring 5 and the negative electrode wiring 6 are arranged along the outdoor unit housing 27, so that excessive surge voltage generated in the fan drive board 4 can be reduced, and the fan drive board 4 The electromagnetic noise generated from the compressor can be released to the outdoor unit casing 27, and the electromagnetic noise can be prevented from propagating to the compressor drive board 3 side and the AC power supply 8 side.
　さらに、室外機１０５では、正極配線５と負極配線６とが、室外機筐体２７の内壁面に沿って束ねて配置されているので、例えば、圧縮機駆動基板３およびファン駆動基板４の交換等の作業性が向上する。 Furthermore, in the outdoor unit 105, the positive electrode wiring 5 and the negative electrode wiring 6 are arranged in a bundle along the inner wall surface of the outdoor unit housing 27, so that, for example, the compressor drive board 3 and the fan drive board 4 can be replaced. Improves work efficiency.
　このように、実施の形態５によれば、正極配線５と負極配線６とが、室外機筐体２７の一部に固定されるとともに、正極配線５の延設方向と負極配線６の延設方向とが平行な状態で室外機筐体２７に沿わせて配置された構造となっている。これにより、室外機１０５は、ファン駆動基板４で発生する過大なサージ電圧およびファン駆動基板４から伝搬する電磁ノイズを低減できるとともに、圧縮機駆動基板３およびファン駆動基板４の交換等の作業性を向上させることができる。 As described above, according to the fifth embodiment, the positive electrode wiring 5 and the negative electrode wiring 6 are fixed to a part of the outdoor unit casing 27, and the extending direction of the positive electrode wiring 5 and the extending direction of the negative electrode wiring 6 are It has a structure in which it is arranged along the outdoor unit casing 27 in parallel with the direction. As a result, the outdoor unit 105 can reduce excessive surge voltage generated in the fan drive board 4 and electromagnetic noise propagated from the fan drive board 4, and improve workability such as replacing the compressor drive board 3 and the fan drive board 4. can be improved.
　以上の実施の形態に示した構成は、一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、実施の形態同士を組み合わせることも可能であるし、要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configurations shown in the embodiments above are merely examples, and can be combined with other known techniques, or can be combined with other embodiments, within the scope of the gist. It is also possible to omit or change part of the configuration.
　１，２　永久磁石モータ、３　圧縮機駆動基板、４　ファン駆動基板、５　正極配線、６　負極配線、７　ケーブル、８　交流電源、９　整流回路、１０　リアクタ、１１　突入電流防止用抵抗、１２　突入電流防止用リレー、１３　平滑コンデンサ、１４，１７　スナバ抵抗、１５，１８　スナバコンデンサ、１６，１９　インバータ回路、２０，２２　正極端子、２１，２３　負極端子、２４　固定チューブ、２５　固定バンド、２６　磁性体コア、２７　室外機筐体、２８　固定部、３０～３３　接続線、３５　電力変換回路、４１　基板間配線、１０１～１０５　室外機。 1, 2 Permanent magnet motor, 3 Compressor drive board, 4 Fan drive board, 5 Positive wiring, 6 Negative wiring, 7 Cable, 8 AC power supply, 9 Rectifier circuit, 10 Reactor, 11 Inrush current prevention resistor, 12 Inrush current Prevention relay, 13 smoothing capacitor, 14, 17 snubber resistor, 15, 18 snubber capacitor, 16, 19 inverter circuit, 20, 22 positive terminal, 21, 23 negative terminal, 24 fixed tube, 25 fixed band, 26 magnetic core , 27 Outdoor unit housing, 28 Fixed part, 30-33 Connection wire, 35 Power conversion circuit, 41 Inter-board wiring, 101-105 Outdoor unit.

Claims (7)

  1. 　冷媒を圧縮する圧縮機を駆動する第１の永久磁石モータと、
    　外気と前記冷媒との間で熱交換を行う熱交換器に送風するファンを駆動する第２の永久磁石モータと、
    　前記第１の永久磁石モータを駆動する圧縮機駆動基板と、
    　前記第２の永久磁石モータを駆動するファン駆動基板と、
    　前記圧縮機駆動基板に接続される正極端子である第１の正極端子と前記ファン駆動基板に接続される正極端子である第２の正極端子とを接続する正極配線と、
    　前記圧縮機駆動基板に接続される負極端子である第１の負極端子と前記ファン駆動基板に接続される負極端子である第２の負極端子とを接続する負極配線と、
    　を備え、
    　前記正極配線および前記負極配線は、前記圧縮機駆動基板から前記ファン駆動基板へ向かって延設される前記正極配線の延設方向である第１の延設方向と、前記圧縮機駆動基板から前記ファン駆動基板へ向かって延設される前記負極配線の延設方向である第２の延設方向とが平行になるように配置されている、
    　空気調和機の室外機。     a first permanent magnet motor that drives a compressor that compresses refrigerant;
    a second permanent magnet motor that drives a fan that blows air to a heat exchanger that exchanges heat between outside air and the refrigerant;
    a compressor drive board that drives the first permanent magnet motor;
    a fan drive board that drives the second permanent magnet motor;
    a positive wiring connecting a first positive terminal that is a positive terminal connected to the compressor drive board and a second positive terminal that is a positive terminal connected to the fan drive board;
    a negative electrode wiring that connects a first negative terminal that is a negative terminal connected to the compressor drive board and a second negative terminal that is a negative terminal connected to the fan drive board;
    Equipped with
    The positive electrode wiring and the negative electrode wiring extend in a first extending direction, which is the extending direction of the positive electrode wiring extending from the compressor drive board toward the fan drive board, and in a first extending direction, which is the extending direction of the positive electrode wiring extending from the compressor drive board toward the fan drive board. arranged so that the second extending direction, which is the extending direction of the negative electrode wiring extending toward the fan drive board, is parallel to the second extending direction;
    Outdoor unit of air conditioner.
  2. 　前記圧縮機駆動基板は、交流電力を直流電力に変換する電力変換回路、および突入電流を防止する突入電流防止回路を有し、
    　前記圧縮機駆動基板と前記ファン駆動基板とで共通の、前記電力変換回路および前記突入電流防止回路が用いられる、
    　請求項１に記載の空気調和機の室外機。     The compressor drive board has a power conversion circuit that converts AC power to DC power, and an inrush current prevention circuit that prevents inrush current,
    The power conversion circuit and the inrush current prevention circuit are used in common by the compressor drive board and the fan drive board,
    The outdoor unit of an air conditioner according to claim 1.
  3. 　前記正極配線および前記負極配線を束ねて筒状の軸方向に貫通させるチューブをさらに備え、
    　前記正極配線および前記負極配線は、前記チューブ内で前記第１の延設方向と前記第２の延設方向とが平行になるように配置されている、
    　請求項１または２に記載の空気調和機の室外機。     further comprising a tube that bundles the positive electrode wiring and the negative electrode wiring and passes through the cylindrical axial direction,
    The positive electrode wiring and the negative electrode wiring are arranged within the tube so that the first extending direction and the second extending direction are parallel to each other.
    The outdoor unit of an air conditioner according to claim 1 or 2.
  4. 　前記チューブの外側から前記チューブの中心軸に向かって前記チューブを締め付ける固定バンドをさらに備え、
    　前記チューブは、少なくとも１箇所が前記固定バンドによって締め付けられることで、前記正極配線および前記負極配線に固定されている、
    　請求項３に記載の空気調和機の室外機。     further comprising a fixing band that tightens the tube from the outside of the tube toward the central axis of the tube,
    The tube is fixed to the positive wiring and the negative wiring by being tightened at at least one location by the fixing band.
    The outdoor unit of an air conditioner according to claim 3.
  5. 　磁性体の部材を用いて形成された磁性体コアをさらに備え、
    　前記チューブは、前記磁性体コアに巻き付けられている、
    　請求項３または４に記載の空気調和機の室外機。     Further comprising a magnetic core formed using a magnetic member,
    the tube is wound around the magnetic core;
    The outdoor unit of an air conditioner according to claim 3 or 4.
  6. 　前記正極配線および前記負極配線は、前記正極配線と前記負極配線とが撚り合わせられることで、前記正極配線の前記第１の延設方向と前記負極配線の前記第２の延設方向とが平行になるように配置されている、
    　請求項１または２に記載の空気調和機の室外機。     The positive electrode wiring and the negative electrode wiring are twisted together so that the first extending direction of the positive electrode wiring and the second extending direction of the negative electrode wiring are parallel to each other. It is arranged so that
    The outdoor unit of an air conditioner according to claim 1 or 2.
  7. 　前記圧縮機駆動基板および前記ファン駆動基板が格納される筐体と、
    　前記筐体に前記正極配線と前記負極配線とをまとめて固定する固定部と、
    　をさらに備え、
    　前記正極配線と前記負極配線とは、前記筐体の内壁面に沿って束ねて配置されている、
    　請求項１または２に記載の空気調和機の室外機。     a casing in which the compressor drive board and the fan drive board are stored;
    a fixing part that fixes the positive electrode wiring and the negative electrode wiring together to the casing;
    Furthermore,
    The positive electrode wiring and the negative electrode wiring are arranged in a bundle along the inner wall surface of the casing.
    The outdoor unit of an air conditioner according to claim 1 or 2.
PCT/JP2022/033536 2022-09-07 2022-09-07 Outdoor unit for air conditioner WO2024053006A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011231964A (en) * 2010-04-27 2011-11-17 Daikin Industries Ltd Air conditioner
KR20170068273A (en) * 2015-12-09 2017-06-19 엘에스산전 주식회사 electrical circuit apparatus for reduction of parasitic inductance, electrical wire for supplying power soure therefor and method for connecting the electrical wire
JP2017133737A (en) * 2016-01-27 2017-08-03 日立ジョンソンコントロールズ空調株式会社 Outdoor unit of air conditioner
JP2018125997A (en) * 2017-02-02 2018-08-09 日立ジョンソンコントロールズ空調株式会社 Air conditioner
JP2019011904A (en) * 2017-06-30 2019-01-24 日立ジョンソンコントロールズ空調株式会社 Outdoor unit of air conditioner, and air conditioner
JP6851554B1 (en) * 2020-04-20 2021-03-31 三菱電機株式会社 Power converter and air conditioner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011231964A (en) * 2010-04-27 2011-11-17 Daikin Industries Ltd Air conditioner
KR20170068273A (en) * 2015-12-09 2017-06-19 엘에스산전 주식회사 electrical circuit apparatus for reduction of parasitic inductance, electrical wire for supplying power soure therefor and method for connecting the electrical wire
JP2017133737A (en) * 2016-01-27 2017-08-03 日立ジョンソンコントロールズ空調株式会社 Outdoor unit of air conditioner
JP2018125997A (en) * 2017-02-02 2018-08-09 日立ジョンソンコントロールズ空調株式会社 Air conditioner
JP2019011904A (en) * 2017-06-30 2019-01-24 日立ジョンソンコントロールズ空調株式会社 Outdoor unit of air conditioner, and air conditioner
JP6851554B1 (en) * 2020-04-20 2021-03-31 三菱電機株式会社 Power converter and air conditioner

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