EP3567320A1 - Outdoor unit and air conditioner - Google Patents

Outdoor unit and air conditioner Download PDF

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Publication number
EP3567320A1
EP3567320A1 EP19172935.9A EP19172935A EP3567320A1 EP 3567320 A1 EP3567320 A1 EP 3567320A1 EP 19172935 A EP19172935 A EP 19172935A EP 3567320 A1 EP3567320 A1 EP 3567320A1
Authority
EP
European Patent Office
Prior art keywords
power supply
connector
supply connector
outdoor unit
supply line
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.)
Withdrawn
Application number
EP19172935.9A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ryohei Yamada
Junichi Yoshida
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 EP3567320A1 publication Critical patent/EP3567320A1/en
Withdrawn legal-status Critical Current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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices

Definitions

  • the present invention relates to an outdoor unit and an air conditioner.
  • a power supply may be required near the outdoor unit when operations such as installation and maintenance are performed.
  • power would generally be supplied from a distance, using a cord reel or the like.
  • cord reel since there is a need to carry the cord reel, this increases the burden on the operator.
  • Patent Document 1 discloses a technique of providing a power receptacle for an outdoor unit in an air conditioner provided with an indoor unit and an outdoor unit.
  • a vacuum pump for performing removal of impurities such as air contained in the refrigerant by a vacuum drawing method is connected to the power receptacle.
  • a supply destination of the power supply is switched from a control device on the outdoor side to the power receptacle by a switching operation of the indoor unit.
  • Patent Document 1 Japanese Unexamined Patent Application, First Publication No. 2000-146270
  • Patent Document 1 a power receptacle is provided inside the outdoor unit.
  • Patent Document 2 a power receptacle is provided inside the outdoor unit.
  • the present invention provides an outdoor unit and an air conditioner capable of stably supplying power by connecting an external device without stopping the power supply to the control device.
  • an outdoor unit includes: an outdoor device disposed outdoor among devices constituting a refrigeration cycle; a control device which has a control board having a main power supply line of single-phase alternating current and is configured to control an operation of the outdoor device; and a casing configured to accommodate the outdoor device and the control device.
  • the control board includes a power supply connector branched and connected to the main power supply line via an auxiliary power supply line, and a relay provided in the auxiliary power supply line and capable of electrically connecting and disconnecting the main power supply line and the power supply connector.
  • the relay capable of performing the electrical connection and disconnection between the main power supply line and the power supply connector.
  • the relay when connecting the external devices to the power supply connector, the power supply connector and the main power supply line can be electrically disconnected without stopping the power supply to other devices such as memory on the control board. Therefore, there is no need to stop the power supply to other devices on the control board such as a volatile memory. Therefore, it is possible to limit occurrences of defects such as disappearance of stored information such as error information stored in the volatile memory.
  • the power supply connector and the main power supply line are electrically disconnected, it is possible to limit occurrences of failure in which a surge or the like occurs and the volatile memory is reset when connecting the external devices to the power supply connector.
  • the power supply connector is provided on the control board, power can be supplied from the power supply connector of the control board to the external devices, even when there is no space for providing the power receptacle or the like in the casing.
  • the power supply connector according to the first aspect may be formed to be able to insert and remove an external connector provided at an end portion of a power supply line outside the casing.
  • the power supply connector according to the second aspect may have the same color display as that of the external connector.
  • the outdoor unit may further include a manipulation switch disposed around the power supply connector and capable of turning on and off a contact of the relay.
  • the manipulation switch disposed around the power supply connector may be operated. Therefore, as compared with a case in which the manipulation switch is disposed at a place separated from the power supply connector, it is possible to easily turn on and off the contact of the relay, and it is possible to limit an operator from forgetting the operation of the manipulation switch.
  • the outdoor unit according to the fourth aspect may further include a cover mechanism which is set to an non-openable restricted state in which it is not be able to open due to covering the power supply connector when the manipulation switch is turned off in cooperation with the operation of the manipulation switch, and is set to an release state in which it can come into contact with the power supply connector when the manipulation switch is turned on.
  • the casing according to any one of the first to fifth aspects may include an openable and closable side wall panel.
  • the control board may be disposed to face the side wall panel when the side wall panel is at a closed position.
  • the power supply connector may be disposed on a surface of the control board facing the side wall panel.
  • an air conditioner includes the outdoor unit according to any one of the first to sixth aspects.
  • the outdoor unit it is possible to stably supply the power by connecting an external device without stopping the power supply to the control device.
  • FIG. 1 is a configuration diagram showing a schematic configuration of an air conditioner according to a first embodiment of the present invention.
  • the air conditioner 100 is provided with an outdoor unit 10 and an indoor unit (not shown).
  • the air conditioner 100 of the first embodiment is a so-called air conditioner for buildings.
  • the air conditioner 100 is capable of performing a cooling operation and a heating operation by causing a refrigerant to circulate between the outdoor unit 10 and an indoor unit (not shown).
  • the outdoor unit 10 is installed outdoors (in other words, outdoor) such as a roof of a building and is connected to an indoor unit (not shown) via a refrigerant piping or the like.
  • the outdoor unit 10 includes a casing 11, an outdoor device 12, and a control device 13.
  • the casing 11 accommodates the outdoor device 12 and the control device 13.
  • the casing 11 provided as an exemplary example in this embodiment is formed in a box shape having a rectangular parallelepiped outer shape.
  • the casing 11 is provided with a heat interchange chamber 14 at the top and provided with a machine chamber 15 at the bottom.
  • the heat interchange chamber 14 accommodates the outdoor device 12 therein, and the machine chamber 15 accommodates the control device 13 therein.
  • the heat interchange chamber 14 is provided with a side wall opening 17 in the side wall 16.
  • the heat interchange chamber 14 is provided with a plurality of fan openings 18a for a fan F in a ceiling portion 18.
  • outside air can flow between the side wall opening 17 and the fan opening 18a.
  • the machine chamber 15 has a plurality of side wall panels 19.
  • the side wall panels 19 are each formed in a rectangular plate shape, and are attachable to and detachable from a frame (not shown) of the machine chamber 15 using fasteners such as screws.
  • FIG. 2 is a circuit diagram showing a schematic configuration of the outdoor unit in the first embodiment of the present invention.
  • the outdoor device 12 is a unit disposed outdoors, among the units constituting the refrigeration cycle of the air conditioner 100.
  • a heat interchanger (not shown), a compressor (not shown), a fan F, and the like are adopted as the outdoor device 12.
  • the outdoor devices 12 are accommodated in the heat interchange chamber 14.
  • the heat interchanger (not shown) functions as a condenser at the time of the cooling operation, and functions as an evaporator at the time of the heating operation.
  • a compressor (not shown) is driven by a motor M.
  • the rotational speed of the motor M for driving the compressor is controlled by an inverter INV.
  • Three-phase alternating current (for example, alternating current 200 V) is supplied to the inverter INV.
  • This three-phase alternating current is supplied to the outdoor unit 10 as a power source from the outside. Further, the three-phase alternating current supplied to the outdoor unit 10 may be supplied from the indoor unit.
  • the control device 13 mainly controls the operation of the outdoor device 12.
  • the control device 13 includes a control board 20 on which a switching (SW) power supply P, a processing device (not shown) such as a central processing unit (CPU), a volatile memory, a nonvolatile memory and the like are mounted.
  • SW switching
  • CPU central processing unit
  • volatile memory volatile memory
  • nonvolatile memory nonvolatile memory
  • the control board 20 is a so-called rigid board, and further has a main power supply line 21 of a single-phase alternating current, an auxiliary power supply line 22, a power supply connector 23, and a relay 24.
  • the main power supply line 21 extracts single-phase alternating current from the three-phase alternating current supplied to the outdoor unit 10.
  • the main power supply line 21 supplies the single-phase alternating current (for example, alternating current 200 V) to a primary side terminal of a switching power supply P such as an AC/DC converter provided inside the control board 20.
  • the direct current power supply (for example, DC 5 V) converted by the switching power supply P is supplied as a power supply for the processing device and various memories mounted on the aforementioned control board 20.
  • the control device 13 When a defect occurs in the operation or the like of the outdoor device 12, the control device 13 accumulates error information on the occurred defect in a volatile memory on the control board 20.
  • the information accumulated in the volatile memory can be loaded into a personal computer (PC) via a communication interface (not shown) mounted in the control device 13.
  • a module for wireless communication such as a wireless local area network (LAN) is mounted in the control device 13 so that error information accumulated in the volatile memory of the control device 13 may be extracted via the wireless communication.
  • LAN wireless local area network
  • the auxiliary power supply line 22 branches off from the main power supply line 21 and supplies three-phase alternating current to the power supply connector 23.
  • the auxiliary power supply line 22 can be formed as a printed wiring on a board made of, for example, an insulator.
  • the power supply connector 23 is a connector that can supply power to external devices M1 and M2 such as a personal computer (PC) and an oscilloscope carried in to perform an operation such as maintenance.
  • the power supply connector 23 is branched and connected to the main power supply line 21 via the auxiliary power supply line 22.
  • the power supply connector 23 in this embodiment is a dedicated connector different from a household receptacle.
  • the power supply connector 23 provided as an exemplary example in this embodiment can further be connected to an external connector 25 provided at an end portion of an electric wire (power supply line) L1 of a power tap or a power cord.
  • This embodiment shows a case in which the power supply connector 23 is a so-called female connector, and the external connector is a male connector.
  • the power supply connector 23 may be a male connector and the external connector may be a female connector.
  • the control board 20 is disposed to face one predetermined side wall panel 19A of the plurality of side wall panels 19 in a state in which the machine chamber 15 is closed by the plurality of side wall panels 19.
  • the power supply connector 23 is disposed on a mounting surface of the control board 20 facing the predetermined side wall panel 19A. That is, by detaching the predetermined side wall panel 19A, it is possible to easily access to the power supply connector 23 on the control board 20 from the opening of the machine chamber 15 formed by detaching the side wall panel 19A.
  • the side wall panel 19A may be swingably supported by the frame via a hinge.
  • the aforementioned power supply connector 23 and the external connector 25 are each provided with the same color display (for example, red).
  • the operator can find the power supply connector 23 connectable with the external connector 25 by looking at the color display of the external connector 25 and searching for the same color indication on the control board 20.
  • the external connector 25 can be inserted to and removed from the power supply connector 23 in this embodiment along the mounting surface of the control board 20. Therefore, a direction in which the electric wire L1 is pulled can be set to be different from a direction in which the external connector 25 is inserted and removed. Therefore, even if the electric wire L1 provided with the external connector 25 is pulled, the external connector 25 can be made difficult to be removed from the power supply connector 23.
  • the relay 24 is provided in the auxiliary power supply line 22. More specifically, the relay 24 is provided in the middle of the auxiliary power supply line 22.
  • the relay 24 enables electrical connection and disconnection between the main power supply line 21 and the power supply connector 23.
  • the relay 24 in this embodiment is a so-called mechanical relay, and it is possible to switch the contacts to an on-state and an off-state, using the DC output on the secondary side of the above-described switching power supply.
  • the relay 24 of this embodiment is connected to the manipulation switch SW.
  • the manipulation switch SW is able to select a first position at which a voltage is applied to a coil (not shown) of the relay 24 and a second position at which no voltage is applied to the coil through the operation of an operator, and is also able to hold the selected state.
  • a non-contact relay using a semiconductor or the like may be used.
  • the contact of the relay 24 a case of contact 'a' in which the contact is closed by the voltage application has been described.
  • the contact of the relay 24 is not limited to the contact 'a'.
  • the relay 24 capable of performing the electrical connection and disconnection between the main power supply line 21 and the power supply connector 23 is included.
  • this relay 24 when connecting the external devices M1 and M2 to the power supply connector 23, the power supply connector 23 and the main power supply line 21 can be electrically disconnected, without stopping the power supply to other devices such as memory on the control board 20. Therefore, there is no need to stop the power supply to other devices on the control board 20 such as a volatile memory. Therefore, it is possible to limit occurrences of defect such as disappearance of stored information such as error information stored in the volatile memory.
  • the power supply connector 23 and the main power supply line 21 are electrically disconnected, when connecting the external devices M1 and M2 to the power supply connector 23, it is possible to limit occurrences of failure in which a surge or the like occurs and the volatile memory is reset.
  • the external connector 25 can be inserted into and removed from the power supply connector 23.
  • the power supply connector 23 has a shape different from that of a household receptacle. Therefore, it is possible to easily connect the external connector to the power supply connector, and to limit erroneous connection of the external power supply line.
  • the power supply connector 23 has the same color display as the external connector 25. Therefore, an operator who sees the color display of the external connector 25 can easily find the position of the power supply connector 23 at which the external connector 25 can be inserted and removed.
  • the contact of the relay 24 can be opened and closed by the manipulation switch. Therefore, it is possible to easily perform turning-on and turning-off of the contact of the relay 24.
  • control board 20 is disposed to face the predetermined side wall panel 19 when the predetermined side wall panel 19 is at the closed position.
  • the power supply connector 23 is disposed on the mounting surface of the control board 20 facing the predetermined side wall panel 19. Therefore, by merely detaching the predetermined side wall panel 19, it is possible to access the power supply connector 23 of the control board 20. Therefore, it is possible to start the power supply from the outdoor unit 10 to the external devices M1 and M2 in a short time.
  • the outdoor unit by providing the outdoor unit, it is possible to easily perform operations such as maintenance of the outdoor unit 10. Therefore, the merchantability of the air conditioner 100 can be improved.
  • the outdoor unit of the second embodiment is different from the outdoor unit of the first embodiment only in the arrangement of manipulation switches. Therefore, the same parts as those of the above-described first embodiment are denoted by the same reference numerals, and redundant explanation will be omitted.
  • FIG. 3 is an enlarged view of the periphery of the power supply connector in the second embodiment of the present invention.
  • the outdoor unit 210 of the second embodiment is provided with a control board 220, on which a switching power supply P, a processing device (not shown) such as a CPU, a volatile memory, a nonvolatile memory and the like are mounted, in the machine chamber 15 of the casing 11.
  • a switching power supply P a switching power supply P
  • a processing device such as a CPU, a volatile memory, a nonvolatile memory and the like are mounted, in the machine chamber 15 of the casing 11.
  • the control board 220 further includes a main power supply line 21 (not shown in FIG. 3 ), an auxiliary power supply line 22, a power supply connector 23, a relay 24, and a manipulation switch SW2.
  • the control board 220 is disposed to face the side wall panel 19A in the closed state.
  • the power supply connector 23 is disposed on the mounting surface of the control board 220 facing the predetermined side wall panel 19A.
  • the manipulation switch SW2 is able to select a first position at which a voltage is applied to a coil (not shown) of the relay 24 and a second position at which no voltage is applied to the coil, by the operation of the operator, and is able to hold the selected state.
  • the manipulation switch SW2 is disposed around the power supply connector 23. More specifically, the manipulation switch SW2 is disposed on the mounting surface of the control board 220 near the power supply connector 23. Although the case in which the manipulation switch SW2 is a slide switch is an exemplary example, the manipulation switch SW2 is not limited to the slide switch.
  • the manipulation switch SW2 disposed around the power supply connector 23 may be operated. Therefore, it is possible to easily turn on and off the contact of the relay 24, as compared with the case in which the manipulation switch is disposed at a place separated from the power supply connector 23. Furthermore, since the manipulation switch SW2 is disposed around the relay 24, it is possible to limit an operator from forgetting the operation of the manipulation switch SW2.
  • An outdoor unit of the third embodiment differs from the outdoor unit of the above-described first embodiment only in the configuration in the vicinity of the power supply connector. Therefore, the same parts as those of the above-described first embodiment are denoted by the same reference numerals, and redundant explanation will be omitted.
  • FIG. 4 is a schematic configuration diagram of a control board in a non-energized state of a power supply connector according to a third embodiment of the present invention.
  • FIG. 5 is a schematic configuration diagram of the control board in the energized state of the power supply connector according to the third embodiment.
  • a control board 320 of an outdoor unit 310 is provided with a control board 320 in the machine chamber 15 of the casing 11.
  • a switching power supply P, a processing device (not shown) such as a CPU, a volatile memory, a nonvolatile memory and the like are mounted on the control board 320.
  • the control board 320 further includes a main power supply line 21, an auxiliary power supply line 22, a power supply connector 23, a relay 24, and a manipulation switch SW.
  • the control board 320 is disposed to face the side wall panel 19A of the closed state.
  • the power supply connector 23 is disposed on the mounting surface of the control board 320 facing the predetermined side wall panel 19A.
  • the control board 320 further includes a cover mechanism 30.
  • the cover mechanism 30 interlocks with the operation of the manipulation switch SW.
  • the cover mechanism 30 is in a restricted state in which an access to the power supply connector 23 is restricted when the manipulation switch SW is turned off. More specifically, the cover mechanism 30 covers the power supply connector 23 to make it in a non-openable state, when the manipulation switch SW is turned off.
  • the cover mechanism 30 is in a state in which it can access the power supply connector 23, when the manipulation switch SW is turned on. That is, the cover mechanism 30 is in an openable state.
  • the cover mechanism 30 provided as an exemplary example in the third embodiment includes a lock portion 31, a support portion 32, and a cover portion 33.
  • the lock portion 31 and the support portion 32 are disposed to face each other with the power supply connector 23 sandwiched therebetween.
  • the cover portion 33 is swingably supported at the upper end portion of the support portion 32 via a hinge.
  • the cover portion 33 can be swung from a closed position (see FIG. 5 ) for restricting access to the power supply connector 23 to an open position (see FIG. 4 ) accessible to the power supply connector 23.
  • the cover portion 33 is formed in a flat plate shape and is disposed to extend between the upper end portion of the support portion 32 and the upper end portion of the lock portion 31 when it is at the closed position.
  • the cover portion 33 is urged toward the closed position using a coil spring (not shown) or the like.
  • a coil spring not shown
  • the lock portion 31 locks the cover portion 33 not to be displaced from the closed position when the manipulation switch SW is turned on.
  • the lock portion 31 in this embodiment locks and unlocks the swinging of the cover portion 33 on the basis of a signal indicating the state of the manipulation switch SW.
  • the lock portion 31 is not limited to a configuration in which the swinging of the cover portion 33 is locked and unlocked on the basis of the signal indicating the state of the manipulation switch SW.
  • the swinging may be unlocked when the power supply connector 23 is energized. For example, in a case in which the line voltage of the two auxiliary power supply lines 22 between the relay 24 and the power supply connector 23 is detected and the line voltage is equal to or less than a preset threshold value, the swinging of the cover portion 33 may be unlocked.
  • the cover portion 33 is locked at the closed position, it is possible to prevent erroneously connecting the external connector 25 to the power supply connector 23 in a state in which the power supply connector 23 is energized due to forgetting to turn off the contact of the relay 24 by the manipulation switch SW.
  • the present invention is not limited to the configurations of the above-described embodiments, and the design change can be made without departing from the gist thereof.
  • the relay 24 may be provided in each of the two wirings of the auxiliary power supply line 22, and the two wirings of the auxiliary power supply line 22 may be simultaneously connected and disconnected by the relay 24.
  • the manipulation switch SW2 of the second embodiment may be used in combination with the third embodiment.
  • the manipulation switch SW2 of the second embodiment may be formed integrally with the lock portion 31 and the support portion 32 of the cover mechanism 30 of the third embodiment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP19172935.9A 2018-05-11 2019-05-07 Outdoor unit and air conditioner Withdrawn EP3567320A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018092510A JP7130426B2 (ja) 2018-05-11 2018-05-11 室外機及び空気調和機

Publications (1)

Publication Number Publication Date
EP3567320A1 true EP3567320A1 (en) 2019-11-13

Family

ID=66448353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19172935.9A Withdrawn EP3567320A1 (en) 2018-05-11 2019-05-07 Outdoor unit and air conditioner

Country Status (3)

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EP (1) EP3567320A1 (ja)
JP (1) JP7130426B2 (ja)
CN (1) CN110469918A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11879646B2 (en) 2021-01-13 2024-01-23 Daikin Industries, Ltd. Air conditioner, and method of replacing functional component

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024069688A1 (ja) * 2022-09-26 2024-04-04 三菱電機ビルソリューションズ株式会社 室外機の電源取り出しケーブル

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JPH11237134A (ja) * 1998-02-23 1999-08-31 Rinnai Corp 空気調和機
JP2000146270A (ja) 1998-11-12 2000-05-26 Sharp Corp 分離型空気調和機とコンセントユニット
JP2009210158A (ja) * 2008-02-29 2009-09-17 Mitsubishi Heavy Ind Ltd 空気調和機の室外ユニット
CN201448934U (zh) * 2008-12-22 2010-05-05 山东朗进科技股份有限公司 空调器室外机
KR20110138670A (ko) * 2010-06-21 2011-12-28 엘지전자 주식회사 공기조화기 및 그 제어방법
CN207149846U (zh) * 2017-09-13 2018-03-27 广东美的暖通设备有限公司 电源接驳结构和空调

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JP3228623B2 (ja) * 1993-12-24 2001-11-12 東芝キヤリア株式会社 空気調和機の制御器
JP2002303439A (ja) * 2001-04-02 2002-10-18 Daikin Ind Ltd 空気調和機の室外機
CN104132420B (zh) * 2013-05-02 2017-04-12 珠海格力电器股份有限公司 低功耗待机电路装置和空调器及空调器的控制方法
JP6184391B2 (ja) * 2014-11-07 2017-08-23 三菱電機株式会社 空気調和機
KR101737364B1 (ko) * 2015-08-31 2017-05-18 엘지전자 주식회사 공기조화기

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Publication number Priority date Publication date Assignee Title
JPH11237134A (ja) * 1998-02-23 1999-08-31 Rinnai Corp 空気調和機
JP2000146270A (ja) 1998-11-12 2000-05-26 Sharp Corp 分離型空気調和機とコンセントユニット
JP2009210158A (ja) * 2008-02-29 2009-09-17 Mitsubishi Heavy Ind Ltd 空気調和機の室外ユニット
CN201448934U (zh) * 2008-12-22 2010-05-05 山东朗进科技股份有限公司 空调器室外机
KR20110138670A (ko) * 2010-06-21 2011-12-28 엘지전자 주식회사 공기조화기 및 그 제어방법
CN207149846U (zh) * 2017-09-13 2018-03-27 广东美的暖通设备有限公司 电源接驳结构和空调

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11879646B2 (en) 2021-01-13 2024-01-23 Daikin Industries, Ltd. Air conditioner, and method of replacing functional component

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Publication number Publication date
JP7130426B2 (ja) 2022-09-05
CN110469918A (zh) 2019-11-19
JP2019196891A (ja) 2019-11-14

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