US20190226690A1 - Outdoor unit for air conditioner, and air conditioner - Google Patents

Outdoor unit for air conditioner, and air conditioner Download PDF

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Publication number
US20190226690A1
US20190226690A1 US16/325,491 US201716325491A US2019226690A1 US 20190226690 A1 US20190226690 A1 US 20190226690A1 US 201716325491 A US201716325491 A US 201716325491A US 2019226690 A1 US2019226690 A1 US 2019226690A1
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US
United States
Prior art keywords
heat
blower fan
main plate
generating element
releasing
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.)
Abandoned
Application number
US16/325,491
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English (en)
Inventor
Naoki Torii
Yohei Kato
Yoshiyuki Sakai
Katsuyuki Yamamoto
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YAMAMOTO, KATSUYUKI, KATO, YOHEI, SAKAI, YOSHIYUKI, TORII, NAOKI
Publication of US20190226690A1 publication Critical patent/US20190226690A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/22—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F24F2013/205—Mounting a ventilator fan therein

Definitions

  • the present disclosure relates to an outdoor unit for an air conditioner and the air conditioner.
  • outdoor units for air conditioner include an outdoor unit including a housing, a propeller fan, a partition plate partitioning the inside of the housing into a machine chamber and a heat-exchanger chamber, an electronic board placed on the machine-room side of the partition plate, and a heatsink placed such that the heatsink projects to the heat-exchanger chamber of the partition plate, where the heatsink cools the electronic board (for example, refer to Patent Literature 1).
  • the heatsink includes heat-releasing fins projecting into the heat-exchanger chamber, and the partition plate inclines relative to a rotary shaft for the propeller fan.
  • Patent Literature 1 Unexamined Japanese Patent Application Kokai Publication No. 2010-236781
  • Reducing the size of and the weight of this type of outdoor unit is required.
  • One of the ways of reducing the size of and the weight of the outdoor unit is to downsize the heatsink.
  • downsizing the heatsink results in reduction in the cooling capacity of the heatsink.
  • an objective of the present disclosure is to provide a downsized and lightweight outdoor unit for air conditioner having a high cooling capacity and an air conditioner.
  • an outdoor unit for an air conditioner of the present disclosure includes a heat exchanger to exchange heat between outdoor air and refrigerant, a blower fan disposed facing the heat exchanger, an electronic board on which a heat-generating element is mounted, a housing including a partition plate, where the partition plate partitions the inside of the housing into a heat-exchanger chamber in which the heat exchanger and the blower fan are placed and a machine chamber in which the electronic board is placed and a portion of the partition plate has an opening, and a heatsink including (i) a main plate disposed covering the opening from the heat-exchanger chamber side of the partition plate and (ii) heat-releasing fins projecting from the main plate to the blower fan side, where the main plate thermally connects to the heat-generating element via the opening, wherein, the greater the amount of heat transferred from the heat-generating element to each of the heat-releasing fins is, the greater the size of each of the heat-releasing fins is.
  • the heat-releasing fins are configured such that, the greater the amount of heat transferred from the heat-generating element to each of the heat-releasing fins is, the greater the size of each of the heat-releasing fins is.
  • the less the amount of heat radiation transferred from the heat-generating element to each of the heat-releasing fins is, the less the size of each of the heat-releasing fins is. Therefore upon comparison between heatsinks having the same total radiation capacity, the heatsink of the present disclosure is smaller and lighter than the heatsink that includes heat-releasing fins that are all the same size.
  • FIG. 1 is a perspective view illustrating an outdoor unit for an air conditioner according to an embodiment of the present disclosure in a state in which a front plate and a ceiling plate are removed from the outdoor unit, when the outdoor unit is diagonally viewed from the front of the outdoor unit;
  • FIG. 2 is an exploded plain view illustrating the outdoor unit for the air conditioner according to the embodiment in the state in which the ceiling plate is removed from the outdoor unit, when the outdoor unit is viewed from above;
  • FIG. 3 is a perspective view illustrating a portion of the outdoor unit for air conditioner according to the embodiment when the portion of the outdoor unit is diagonally viewed from the front of the portion of the outdoor unit;
  • FIG. 4 is a drawing illustrating a heatsink and an electronic board according to the embodiment
  • FIG. 5 is a drawing illustrating the heatsink and heat-generating elements according to the embodiment.
  • FIG. 6 is a drawing for describing a positional relationship between the heatsink and the electronic board and a blower fan according to the embodiment
  • FIG. 7 is a drawing illustrating a relationship between the ratio of the shortest distance from between an end of a propeller of the blower fan and an end of the heatsink to the diameter of the blower fan, and a noise level “SPL” in the outdoor unit for air conditioner according to the embodiment and
  • FIG. 8 is a drawing for describing a positional relationship between the heatsink and the electronic board and a blower fan according to a variation of the present disclosure.
  • the outdoor unit according to the present embodiment is connected to an indoor unit via refrigerant pipe, where the indoor unit is placed in a building, for example.
  • the air conditioner includes the outdoor unit and the indoor unit.
  • the outdoor unit 1 includes a housing 2 , a heat exchanger 5 to exchange heat between outdoor air and refrigerant, a compressor 7 to compress the refrigerant, a blower fan 6 to supply air to the heat exchanger 5 , and a motor 102 to drive the blower fan 6 . Also, as illustrated in FIG.
  • the outdoor unit 1 further includes an electronic board 9 for controlling the compressor 7 and the motor 102 , and a heatsink 8 for cooling the electronic board 9 .
  • an X-Y-Z coordinate system is set and referred to appropriately as illustrated in FIGS. 1 and 2 , in which a forward direction of the outdoor unit 1 is set to the positive Z direction, an upward direction of the outdoor unit 1 is set to the positive Y direction, and a leftward direction of the outdoor unit 1 is set to the positive X direction.
  • a symbol, “J 1 ” illustrated in FIG. 2 denotes a rotation axis of the blower fan 6 .
  • the housing 2 includes a rectangular-shaped bottom plate 21 , side walls 22 a, 22 b, 22 c and 22 d that are erectly disposed on the periphery of the bottom plate 21 , a ceiling plate fixed to edges of the side walls 22 a, 22 b, 22 c and 22 d (and not illustrated in the drawings), and a front plate 103 .
  • the housing 2 as a whole is contoured so as to have a rectangular box-like shape. Part of the front-side portion of and part of the rear-side portion of the housing 2 are not covered with the side walls 22 b and 22 d and thus are opened.
  • the front plate 103 is arranged to cover the opened area that is not covered with the side wall 22 b on the front side of the housing 2 .
  • the housing 2 includes a partition plate 23 .
  • the partition plate 23 partitions the inside of the housing 2 into a heat-exchanger chamber H and a machine chamber M, where the heat exchanger 5 and the blower fan 6 are placed in the heat-exchanger chamber H, and the compressor 7 and the electronic board 9 are placed in the machine chamber M.
  • the partition plate 23 includes a lower-side partition plate 231 and an upper-side partition plate 232 .
  • the lower-side partition plate 231 extends from the bottom plate 21 of the housing 2 toward the ceiling plate.
  • the upper-side partition plate 232 is arranged on the upper side of the lower-side partition plate 231 and extends from the upper edge of the lower-side partition plate 231 to the ceiling plate. As illustrated in FIG.
  • a portion of the upper-side partition plate 232 is provided with an opening 232 a that has a rectangular shape in a plan view.
  • the partition plate 23 is arranged in the periphery of a region in which airflow generated by rotation of the blower fan 6 flows.
  • two elongate support elements 101 extending from the bottom plate 21 upward are placed near the rear-side edge of the bottom plate 21 of the housing 2 .
  • the support elements 101 support the motor 102 .
  • a fixation element 104 for fixing the motor 102 to the support elements 101 is placed in the central portions of the two support elements 101 with respect to the longitudinal direction of the support elements.
  • the motor 102 is fixed to the two support elements 101 via the fixation element 104 .
  • the heat exchanger 5 is arranged to cover the opened area that is located on the rear side of the heat-exchanger chamber H of the housing 2 and that is not covered with the side wall 22 d.
  • the heat exchanger 5 exchanges heat between outdoor air and refrigerant.
  • the compressor 7 is arranged on the lower side of the machine chamber M of the housing 2 and is connected to the heat exchanger 5 via a refrigerant pipe (not illustrated in the drawings).
  • the compressor 7 compresses the refrigerant that is supplied from the heat exchanger 5 through the refrigerant pipe.
  • the blower fan 6 includes blades 62 (three blades in the example illustrated in FIGS. 1 and 2 ) and a hub 61 to which the blades 62 are fixed.
  • the blower fan 6 is arranged to face the heat exchanger 5 .
  • the motor 102 is coupled to the hub 61 of the blower fan 6 to drive the blower fan 6 .
  • the electronic board 9 is used for controlling the compressor 7 , the motor 102 and the like.
  • the electronic board 9 includes a circuit board having a conductive pattern and circuit elements mounted on the circuit board. Heat-generating elements such as a switching element, a rectifier element and the like are mounted on the electronic board 9 .
  • the heatsink 8 includes a main plate 81 placed to cover the opening 232 a of the upper-side partition plate 232 and heat-releasing fins 82 projecting from the main plate 81 .
  • Flanges 811 provided on the both edges of the main plate 81 with respect to the longitudinal direction of the main plate 81 are fixed to the outer peripheral portion of the opening 232 a of the upper-side partition plate 232 .
  • the heatsink 8 is fixed to the upper-side partition plate 232 .
  • the heatsink 8 is arranged to cover the opening 232 a from the heat-exchanger-chamber-H side of the partition plate 23 .
  • the heat-releasing fins 82 of the heatsink 8 project into the heat exchanger chamber H.
  • the electronic board 9 is fixed to the upper-side partition plate 232 with a board holder 105 placed between the electronic board 9 and the upper-side partition plate 232 .
  • the heat-generating elements 10 are arranged to the inside of an opening 105 a of the board holder 105 and to the inside of the opening 232 a of the upper-side partition plate 232 .
  • the main plate 81 of the heatsink 8 comes into contact with the heat-generating elements 10 through the opening 232 a of the upper-side partition plate 232 .
  • Each of the heat-releasing fins 82 is shaped like a rectangular plate.
  • the heat-releasing fins 82 are arranged at fixed intervals in the vertical direction and have the same length in the Z direction. Also, the top edges of the heat-releasing fins 82 are parallel to one another.
  • the heatsink 8 is placed in the housing 2 such that the heat-releasing fins 82 extend in a direction intersecting the axis of the rotation of the blower fan 6 .
  • the heat-releasing fins 82 are configured such that, the greater the amounts of heat transferred from the heat-generating elements 10 to the heat-releasing fins 82 are, the greater the heights of the heat-releasing fins 82 from the main plate 81 are.
  • heat-releasing fins 82 are configured to have heights H 1 and H 2 that are greater than the height of a heat-releasing fin 82 , the base of which is connected to a portion of the main plate 81 other than the portions coming into contact with the heat-generating elements 10 A and 10 B.
  • the heat-releasing fin 82 is configured to have the height H 1 greater than the height H 2 of the heat-releasing fin 82 , the base of which is connected to the portion coming into contact with the heat-generating element 10 B.
  • the heat-releasing fins 82 are configured such that, the longer the distances from portions of the main plate 81 connected to the bases of the heat-releasing fins 82 to a portion of the main plate 81 coming into contact with a heat-generating element 10 are, the smaller the heights of the heat-releasing fins 82 from the main plate 81 are. For example, as illustrated in FIG.
  • heat-releasing fins 82 A, 82 B and 82 C are configured such that, the longer the distances L 21 , L 22 and L 23 between a portion CP 21 of the main plate 81 connected to the base of the heat-releasing fin 82 A and a contact portion P 12 of the main plate 81 coming into contact with the heat-generating element 10 B, between a portion CP 22 of the main plate 81 connected to the base of the heat-releasing fin 82 B and the contact portion P 12 of the main plate 81 , and between a portion CP 23 of the main plate 81 connected to the base of the heat-releasing fin 82 C and the contact portion P 12 of the main plate 81 are, the smaller the heights H 21 , H 22 and H 23 of the heat-releasing fins 82 A, 82 B and 82 C from the main plate 81 are.
  • heat-releasing fins 82 are larger than heat-releasing fins 82 , the bases of which are connected to portions of the main plate 81 other than the contact portions P 11 and P 12 and are adjacent to the heat-releasing fins 82 , the bases of which are connected to the contact portions P 11 and P 12 .
  • heat-releasing fins 82 D are larger than a heat-releasing fin 82 A that is adjacent to the heat-releasing fins 82 D in the positive Y direction and have bases that are connected to a portion of the main plate 81 other than the contact portions P 11 and P 12 . Heights of the heat-releasing fins 82 from the main plate 21 increase with increasing degree of inclusion of the heat-releasing fins in the projected area AA or AB of the heat radiating element 10 A or the heat radiating element 10 B in the thickness direction of the main plate 81 (the X direction).
  • the heat-generating element 10 A has a rectangular shape when the heat-generating element 10 A is viewed in the plan view, and notches 101 A are formed at the both edges of the heat-generating element 10 A in the longitudinal direction of the heat-generating element 10 A.
  • the heat-generating element 10 B has a rectangular shape when the heat-generating element 10 B is viewed in the plan view, and two through holes 101 B that penetrate the heat-generating element 10 B in the thickness direction of the heat-generating element 10 B are formed at the both edges of the heat-generating element 10 B in the longitudinal direction of the heat-generating element 10 B.
  • a screw hole 812 is drilled on the inside of each of the notches 101 A in the main plate 81 of the heatsink 8 with the heat-generating element 10 A arranged at a predetermined position on the main plate 81 .
  • a screw hole 813 is drilled on the inside of each of the two through holes 101 B in the main plate 81 with the heat-generating element 10 B arranged at a predetermined position on the main plate 81 .
  • the heat-generating element 10 A can be fixed at the predetermined position on the main plate 81 by screwing screws (not illustrated in the drawings) into the screw holes 812 of the main plate 81 with the heat-generating element 10 A arranged at the predetermined position.
  • the heat-generating element 10 B can be fixed at the predetermined position on the main plate 81 by inserting screws (not illustrated in the drawings) into the through holes 101 B of the heat-generating element 10 B and screwing the screws into the screw holes 813 of the main plate 81 with the heat-generating element 10 B arranged at the predetermined position.
  • an amount of heat radiated by a heat-generating element 10 A is assumed to be greater than an amount of heat radiated by a heat-generating element 10 B in FIG. 6 .
  • the blower fan 6 is assumed to rotate around the rotation axis J 1 , and the leading edges of the blades 62 of the blower fan 6 are assumed to trace the trajectory C 1 .
  • the shortest distance L 1 between the heat-generating element 10 A and the blower fan 6 is set to a distance shorter than the shortest distance L 2 between the heat-generating element 10 B and the trajectory C 1 .
  • the shortest distance W 1 between the leading edge of each of the heat heat-releasing fins 82 and the trajectory C 1 of the leading edges of the blades 62 of the blower fan 6 is set to a distance that are 0.08 times or more as large as the diameter of the blower fan 6 , that is, the diameter 2 R 1 of the trajectory C 1 .
  • an arc C 2 denotes an arc, the radius of which is greater than the radius R 1 of the trajectory C 1 by the length “W 1 ”.
  • the leading edges of some of the blades 62 of the blower fan 6 are located on the arc C 2 .
  • FIG. 7 illustrates the results of measurement of the relationship between a ratio of the shortest distance W 1 between the leading edge of each of the heat-releasing fins 82 and the trajectory C 1 to the diameter 2 R 1 of the trajectory C 1 , and a sound pressure level (SPL) of noise occurring in the outdoor unit 1 .
  • the results illustrated in FIG. 7 show that, when the ratios of the shortest distance W 1 between the leading edge of each of the heat-releasing fins 82 and the trajectory C 1 to the diameter 2 R 1 of the trajectory C 1 was 0.08 or more, the sound pressure level of noise occurring in the outdoor unit 1 was zero.
  • the sound pressure level of noise occurring in the outdoor unit 1 can be made to decrease to zero by setting the shortest distance W 1 between the leading edge of each of the heat-releasing fins 82 and the trajectory C 1 to a distance that is larger than the distance that is 0.08 times as large as the diameter 2 R 1 of the trajectory C 1 .
  • the outdoor unit 1 is configured such that, the greater the amounts of heat transferred from the heat-generating elements 10 to the heat-releasing fins 82 are, the greater the heights of the heat-releasing fins 82 from the main plates 81 are.
  • a heat-releasing fin of the heat-releasing fins 82 that receives a great amount of heat transferred from a heat-generating element 10 to heat up has a large heat-releasing area, and thus cooling capacity of the electronic board 9 is improved.
  • the outdoor unit 1 is configured such that, the less the amounts of heat transferred from the heat-generating elements 10 to the heat-releasing fins 82 are, the lower the heat-releasing fins 82 are, and thus the heatsink 8 of the present embodiment can be configured to be smaller and lighter than, for example, a heatsink including fins the number of which is equal to the number of the heat-releasing fins 82 of the heat sink 8 , where the fins have a rectangular shape and the same dimensions in the X and Z directions and are arranged at regular intervals in the vertical direction.
  • the efficiencies of heat transfer from the heat-releasing fins 82 A, 82 B and 82 C to the surrounding air decrease, and thus the heat-releasing fins 82 A, 82 B and 82 C make a small contribution to cooling of the heat-generating element 10 B.
  • the heat-releasing fins 82 A, 82 B and 82 C of the present embodiment are configured such that, the longer the distances L 21 , L 22 and L 23 from the connection portions CP 21 , CP 22 and CP 23 of the heat-releasing fins 82 A, 82 B and 82 C to the contact portion P 12 of the heat-generating element 10 B, the smaller the heights H 1 , H 2 and H 3 of the heat-releasing fins 82 A, 82 B and 82 C are.
  • the heat-releasing fins 82 A, 82 B and 82 C to which small amounts of heat are transferred from the heat-generating element 10 B have small heat capacities, and thus the differences between a temperature of each of the heat-releasing fins 82 A, 82 B and 82 C and a temperature of the surrounding air are increased.
  • the efficiencies of heat transferred from the heat-releasing fins 82 A, 82 B and 82 C to the surrounding air are increased and thus the heat-releasing fins 82 A, 82 B and 82 C make a large contribution to cooling of the heat-generating element 10 B.
  • the small heights H 21 , H 22 and H 23 of the heat-releasing fins 82 A, 82 B and 82 C enable reduction in the size and weight of the whole of the heatsink 8 .
  • the shortest distance W 1 between the leading edge of each of the heat-releasing fins 82 and the trajectory C 1 of the leading edge of each of the blades 62 of the blower fan 6 is set to a distance that is larger than the distance that is 0.08 as large as the diameter 2 R 1 of the blower fan 6 .
  • the sound pressure level of the noise occurring in the outdoor unit 1 can be reduced to zero.
  • the heat-generating elements 10 are mounted on the electronic board 9 such that, the greater amount of heat the heat-generating elements 10 radiate, the nearer the heat-generating elements 10 are to the trajectory C 1 of the leading edges of the blades 62 of the blower fan 6 .
  • a heat-releasing fin 82 that is connected to a connection position of the main plate 81 that comes into contact with a heat-generating element radiating a large amount of heat, for example, the heat-generating element 10 A in FIG. 6 , can be exposed to air flow having higher flow speed, and thus cooling capacity of the heat-generating element 10 A can be more improved.
  • heat-releasing fins 82 that are connected to portions of the main plate other than the connection portion of the main plate 81 that comes into contact with the heat-generating element 10 A can be made to have a low ability necessary for cooling the heat-generating elements, and thus the heights of such heat-releasing fins 82 can be reduced so that the heatsink 8 can be downsized.
  • an orientation of the heatsink 8 is not limited to that of the heatsink 8 illustrated in FIG. 6 , and the orientation of the heatsink 8 may be changed in accordance with a position at which a heat-generating element 10 is mounted.
  • the heat-generating element 10 A radiating a large amount of heat is assumed to be mounted on the electronic board 9 upward of the heat-generating element 10 B radiating a small amount of heat (in the positive Y direction).
  • the electronic board 9 may tilt relative to the vertical direction (Y direction).
  • the shortest distance L 201 between the heat-generating element 10 A and the trajectory C 1 is set to a distance that is shorter than the shortest distance L 202 between the heat-generating element 10 B and the trajectory C 1 , and thus the same effect as the above embodiment can be obtained.
  • a position of the heatsink 8 is not limited to that of the heatsink 8 illustrated in FIG. 1 and may be changed in accordance with the position of the electronic board 9 .
  • the present disclosure is not limited to a structure in which the heat-releasing fins 82 are made to be different from one another in size by making the heights of the heat-releasing fins 82 different from one another.
  • the heat-releasing fins 82 may be configured such that, the greater the amount of heat transferred from the heat-generating elements 10 to each of the heat-releasing fins 82 is, the longer the length of each of the heat-releasing fins 82 in the Z direction is.
  • the heat-releasing fins 82 may be configured such that, the greater the amount of heat transferred from the heat-generating elements 10 to each of the heat-releasing fins 82 is, the greater the thickness of each of the heat-releasing fins 82 is.
  • the above-described embodiment is an example in which, the main plate 81 of the heatsink 8 directly comes into contact with the heat-generating elements 10 .
  • the present disclosure is not limited to the above structure of the present embodiment.
  • the main plate 81 of the heatsink 8 may be thermally connected to the heat-generating elements 10 via another heat transfer member such as thermal grease.
  • the present disclosure can be suitably applied to outdoor units for air conditioners.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Other Air-Conditioning Systems (AREA)
US16/325,491 2016-09-27 2017-09-26 Outdoor unit for air conditioner, and air conditioner Abandoned US20190226690A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2016-187900 2016-09-27
JP2016187900 2016-09-27
PCT/JP2017/034721 WO2018062170A1 (ja) 2016-09-27 2017-09-26 空気調和機の室外機および空気調和機

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US (1) US20190226690A1 (ja)
EP (1) EP3521712A4 (ja)
JP (2) JPWO2018062170A1 (ja)
CN (1) CN109716034B (ja)
WO (1) WO2018062170A1 (ja)

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US11603998B2 (en) 2019-01-30 2023-03-14 Mitsubishi Electric Corporation Outdoor unit and air conditioner

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JP7333500B2 (ja) * 2019-07-10 2023-08-25 東芝キヤリア株式会社 冷凍サイクル装置の室外機
JPWO2023136123A1 (ja) * 2022-01-11 2023-07-20
WO2024069693A1 (ja) * 2022-09-26 2024-04-04 三菱電機株式会社 室外機及び空気調和機

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CN109716034A (zh) 2019-05-03
EP3521712A1 (en) 2019-08-07
WO2018062170A1 (ja) 2018-04-05
JPWO2018062170A1 (ja) 2019-01-10
CN109716034B (zh) 2021-03-19
EP3521712A4 (en) 2020-01-01
JP7114205B2 (ja) 2022-08-08
JP2020197375A (ja) 2020-12-10

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