WO2017168591A1 - Dispositif et procédé d'aide au refroidissement - Google Patents

Dispositif et procédé d'aide au refroidissement Download PDF

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Publication number
WO2017168591A1
WO2017168591A1 PCT/JP2016/060247 JP2016060247W WO2017168591A1 WO 2017168591 A1 WO2017168591 A1 WO 2017168591A1 JP 2016060247 W JP2016060247 W JP 2016060247W WO 2017168591 A1 WO2017168591 A1 WO 2017168591A1
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WO
WIPO (PCT)
Prior art keywords
reverse osmosis
treated water
osmosis membrane
cooling
outdoor unit
Prior art date
Application number
PCT/JP2016/060247
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English (en)
Japanese (ja)
Inventor
賢二 上野
眞吾 斉田
千佳男 鳫
Original Assignee
クリタ・ケミカル関東株式会社
セイコー産業東京株式会社
ダイヤアクアソリューションズ株式会社
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 クリタ・ケミカル関東株式会社, セイコー産業東京株式会社, ダイヤアクアソリューションズ株式会社 filed Critical クリタ・ケミカル関東株式会社
Priority to PCT/JP2016/060247 priority Critical patent/WO2017168591A1/fr
Publication of WO2017168591A1 publication Critical patent/WO2017168591A1/fr

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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
    • F24F1/42—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger characterised by the use of the condensate, e.g. for enhanced cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers

Definitions

  • the present invention relates to a cooling assistance device and a cooling assistance method that improve heat dissipation characteristics of a heat exchanger of an outdoor unit for a cooling device installed outdoors and can save labor of the entire cooling device.
  • the air conditioner has an outdoor unit outdoors, and the refrigerant dissipates heat through the heat exchanger of the outdoor unit and condenses. Therefore, the heat dissipation characteristics of the heat exchanger greatly contribute to the operating efficiency of the entire air conditioner. Affect. *
  • This cooling auxiliary device sprinkles water toward the heat exchanger and cools the heat exchanger itself, thereby improving the heat radiation characteristics and improving the operation efficiency of the entire cooling device.
  • this type of cooling assistance device includes reverse osmosis membrane treated water generating means for generating reverse osmosis membrane treated water (hereinafter referred to as RO water) by reverse osmosis membrane treatment from water supplied from a water supply source.
  • RO water reverse osmosis membrane treated water
  • RO water RO water that has been subjected to reverse osmosis membrane treatment instead of tap water has been developed to be sprayed toward a heat exchanger (see, for example, Patent Document 3).
  • the present invention can improve the heat dissipation characteristics while preventing the scale adhesion and corrosion of the heat exchanger, and the cooling auxiliary device and the apparatus introduction cost and the operation cost are low.
  • the purpose is to provide a cooling assistance method.
  • the feature of the invention described in claim 1 for solving the conventional problems as described above and achieving the intended purpose is that the air around the outdoor unit is passed through the heat exchanger of the outdoor unit for the cooling device.
  • the cooling auxiliary device used to enhance the heat dissipation of the heat exchanger uses reverse osmosis membrane treated water from the water supplied from the water supply source.
  • the reverse osmosis membrane treated water generating means to be generated the spray nozzle having a small diameter consisting of one fluid nozzle with the spray port directed to the air around the outdoor unit, and the spray nozzle generated by the reverse osmosis membrane treated water generating means
  • the treated water supply means includes a control unit that controls supply of the reverse osmosis membrane treated water to the spray nozzle, and the spray nozzle In that it is sprayed intermittently at a desired interval.
  • the spray nozzle is fixed to an outer surface of the outdoor unit with a spray port facing outward.
  • the air around the heat exchanger is A cooling assistance method for improving heat dissipation of the heat exchanger by cooling, wherein reverse osmosis membrane treated water is generated from water supplied from a water supply source using a reverse osmosis membrane, and is temporarily stored in a pressurized tank.
  • the reverse osmosis membrane treated water stored in the tank is supplied at a high pressure to a spray nozzle having a small diameter consisting of a single fluid nozzle by a transfer means comprising a diaphragm pump, and the reverse osmosis membrane treated water is directed to the air around the outdoor unit. It is in the cooling assistance method sprayed in a fine mist form with a desired particle size from the spray nozzle.
  • the cooling auxiliary device condenses the refrigerant by exchanging heat with the air around the outdoor unit via the heat exchanger of the outdoor unit for the cooling unit.
  • the cooling auxiliary device used to improve the heat dissipation of the reverse osmosis membrane treated water generating means for generating reverse osmosis membrane treated water from the water supplied from the water supply source using the reverse osmosis membrane, and the spray port for the outdoor
  • the treated water supply means includes a pressurized tank for temporarily storing the reverse osmosis membrane treated water, and a diaphragm pump for supplying the reverse osmosis membrane treated water stored in the pressurized tank to the spray nozzle.
  • a transfer means comprising Since the reverse osmosis membrane treated water is sprayed in a fine mist shape with a desired particle size from the fog nozzle toward the air around the outdoor unit, RO water is used, so the scale adheres to the heat exchanger. And corrosion can be prevented, and clogging of the spray nozzle can be prevented. Furthermore, since the heat dissipation characteristics of the heat exchanger can be improved with a small amount of water, the introduction cost and running cost of the apparatus can be suppressed. *
  • the treated water supply means includes a control unit that controls the supply of the reverse osmosis membrane treated water to the spray nozzle, and sprays the spray nozzle intermittently at a desired interval.
  • the said spray nozzle can spray RO water mist suitably toward the surrounding air of an outdoor unit by fixing the spray port to the outer surface of the said outdoor unit toward the outside.
  • the heat exchange is performed by cooling the air around the heat exchanger.
  • This is a cooling assistance method for improving the heat dissipation performance of a vessel, wherein reverse osmosis membrane treated water is generated from water supplied from a water supply source using a reverse osmosis membrane, and temporarily stored in a pressurized tank Treated water is supplied at a high pressure to a fine-diameter spray nozzle composed of a single fluid nozzle by transfer means comprising a diaphragm pump, and the reverse osmosis membrane treated water is supplied from the spray nozzle toward the air around the outdoor unit to a desired particle size.
  • the amount of water used can be suppressed and the running cost can be reduced.
  • reference numeral 1 denotes an outdoor unit for a cooling device
  • reference numeral 2 denotes a cooling auxiliary device
  • the outdoor unit 1 includes a box-shaped housing 11 through which a refrigerant circulation path (not shown) passes, and heat exchangers 12 and 12 provided on the circulation path, via the heat exchangers 12 and 12.
  • the refrigerant is condensed by exchanging heat with the air around the outdoor unit 1.
  • the outdoor unit 1 is provided with ventilation means such as a fan 13 inside, takes air from outside the outdoor unit 1, and is exhausted to the outside through heat exchange with the heat exchangers 12 and 12. Yes. *
  • the cooling auxiliary device 2 is used to improve the heat dissipation characteristics of the heat exchangers 12 and 12 when the refrigerant exchanges heat with the air around the outdoor unit 1 via the heat exchangers 12 and 12 of the outdoor unit 1.
  • This cooling auxiliary device 2 includes reverse osmosis membrane treated water generating means 4 for generating reverse osmosis membrane treated water (hereinafter referred to as RO water) from water supplied from a water supply source 3 using a reverse osmosis membrane, and a spray port ... To the air around the outdoor unit 1, and the RO water generated by the reverse osmosis membrane treated water generating means 4 to each spray nozzle 5, 5. And the treated water supply means 6 to be supplied at the same time.
  • the water supply source 3, the reverse osmosis membrane treated water generating means 4, the treated water supply means 6 are sequentially passed through the spray nozzles 5, 5.
  • the RO water can be sprayed in a fine mist shape with a desired particle size toward the air. *
  • water supply source 3 is not specifically limited, For example, you may make it take water from the intake of tap water, and may take water from the water storage tank installed in the rooftop. *
  • the reverse osmosis membrane treated water generating means 4 includes a pretreatment unit 41 that filters the water supplied from the water supply source 3, and reverse osmosis membrane modules 42, 42. , A transfer means 43 interposed between the pretreatment unit 41 and the reverse osmosis membrane modules 42, 42... And a control unit 44 for controlling the operation of the transfer means 43, and supplied from the water supply source 3.
  • Water such as tap water passes through the pretreatment unit 41 and the reverse osmosis membrane modules 42, 42... Sequentially through pipe lines 451 to 455 connecting the respective parts, and RO water is generated, and the RO water is supplied to the treated water.
  • the treated water supply means 6 is supplied from the port 47. *
  • the reverse osmosis membrane treated water generating means 4 includes a box-shaped casing 46, and each part including a pretreatment unit 41, reverse osmosis membrane modules 42, 42. Is housed and unitized. *
  • the pretreatment unit 41 includes a plurality of types of filters such as a sediment filter 411 and activated carbon filters 412 and 413, and through these various filters 411 to 413, fine water such as rust and dust is taken from the water taken from the water supply source 3. It removes impurities and decolorizes and deodorizes. *
  • the pipe 452 connected to the end of the pretreatment section 41 is branched at the other end and connected to the transfer means 43, and the water pretreated by the operation of the transfer means 43 is converted into the reverse osmosis membrane modules 42, 42 ...
  • the water is taken into the pretreatment unit 41 from the water supply source 3.
  • each diaphragm pump 431 is controlled by the control unit 44 so that water can be transferred at a desired flow rate and water pressure.
  • the reverse osmosis membrane modules 42, 42... Pass water that has passed through the reverse osmosis membrane using the reverse osmosis membrane by passing the water transferred from the pretreatment unit 41 through the transfer means 43 (reverse osmosis membrane).
  • Treated water) and concentrated water in which impurities are dissolved at a high concentration, and reverse osmosis membrane treated water (RO water) substantially removes all impurities such as salt, metal ions, and dissolved silica. . *
  • the separated RO water and concentrated water are transferred to the treated water supply port 47 and the concentrated drainage port 48 through pipelines 454 and 455 in conjunction with the operation of the transfer means 43, and the generated RO water is The concentrated water is supplied to the treated water supply means 6 and is subjected to wastewater treatment.
  • Various kinds of measuring instruments such as a high pressure switch 491, a flow meter 492, and a water quality meter 493 are interposed in a pipe line 454 connecting the treated water supply port 47 and the reverse osmosis membrane modules 42, 42.
  • the data measured by 493 is sent to the control unit 44, and the control unit 44 controls the transfer means 43, that is, the diaphragm pumps 431, 431, ... based on these measurement data.
  • reference numerals 494 and 495 denote pressure gauges for measuring the water pressure of the water flowing through the pipe lines 451 to 455. *
  • Reference numeral 7 in the figure is a communication hose for connecting the reverse osmosis membrane treated water generating means 4 and the treated water supply means 6, and one end of the communication hose 7 is connected to the treated water supply port 47 via a joint, The other end is connected to the water inlet 61 of the treated water supply means 6.
  • the treated water supply means 6 includes a water storage section 62 for temporarily storing RO water, a transfer means 63 interposed between the water storage section 62 and the nozzle side connection port 68, and a transfer means. And a control unit 64 for controlling the operation of 63, each unit is connected by pipes 651 to 655, and RO water introduced from the water inlet 61 is temporarily stored in the water storage unit 62, and is passed through the water supply hose 8.
  • the spray nozzles 5, 5... Can be supplied with a desired water pressure.
  • the treated water supply means 6 includes a box-shaped housing 66, and each unit including the water storage unit 62, the transfer unit 63, and the control unit 64 is accommodated in the housing 66 as a unit.
  • the treated water supply means 6 includes an atmosphere measuring means 67 including a thermometer 671 for measuring the temperature around the outdoor unit 1, a hygrometer 672 for measuring humidity and the like, and is sent from the atmosphere measuring means 67. Based on the measurement data, the control unit 64 controls the transfer means 63. *
  • the water storage unit 62 is configured by water storage tanks 621 and 621 that are configured by pressurized tanks and can store a certain amount of water.
  • One end of the water storage unit 62 is connected to the water inlet 61 through a conduit 651 and the other end is connected through a conduit 652. It branches and is connected to the transfer means 63. *
  • the transfer means 63 includes a plurality of diaphragm pumps 631, 631,..., And diaphragm pumps 631, 631 arranged in series are branched into a plurality of systems (three systems in the figure), and each diaphragm pump is provided. .., 631... Are controlled by the control unit 64 so that RO water having a desired flow rate can be transferred at a high pressure. *
  • the control unit 64 includes a calculation unit including a CPU, a timer unit for controlling operation timing, and a switching device that transmits an operation signal to each diaphragm pump 631, 631,.
  • the diaphragm pumps 631, 631,... are operated to appropriately select a desired system, and RO water can be supplied to the spray nozzles 5, 5,. *
  • the pipes 653 to 655 led out from the transfer means 63 are connected to the nozzle side connection port 68, and the water supply hose 8 connected to the spray nozzles 5, 5. ing. *
  • a water pressure adjusting means 69 including a water pressure adjusting valve 691 is interposed, and RO transferred to the injection nozzles 5, 5.
  • the water can be adjusted to a desired water pressure.
  • Reference numeral 692 in the figure denotes a pressure gauge that measures the water pressure of the RO water flowing through the pipes 653 to 655.
  • the spray nozzles 5, 5... Are one-fluid nozzles having a small diameter and having a nozzle diameter of 0.15 mm to 0.5 mm, and RO supplied from the treated water supply means 6 at a desired water pressure. Water is sprayed in the form of fine mist with a desired particle size of 1.3 to 48 ⁇ m. *
  • each spray nozzle 5,5 ... is not specifically limited, for example, as shown in FIG. 4, it is a width direction on the outer surface of the outdoor unit 1 and the surface where the heat exchangers 12, 12 are exposed. It is preferable that the spray port is fixed to the outside in the horizontal direction at intervals, and the spray nozzles 5, 5... Depend on the size of the outdoor unit 1 and the area of the surface where the heat exchangers 12, 12 are exposed. May be provided in a multistage arrangement in the vertical direction. *
  • the nozzle support body 51 which supports each spray nozzle 5,5 ... is installed on the floor surface adjacent to the outdoor unit 1, and the spray port of each spray nozzle 5,5 ... is directly connected to the heat exchanger 12. , 12 may be supported by the nozzle support body 51 so as not to face.
  • the reverse osmosis membrane treated water is generated from the water supplied from the water supply source 3 by using the reverse osmosis membrane treated water generation means 4. Then, the reverse osmosis membrane treated water is sprayed to the air around the outdoor unit 1 with a desired particle size, whereby the air around the outdoor unit 1 is passed through the heat exchangers 12 and 12 of the outdoor unit 1 for the cooling device.
  • the refrigerant is condensed by exchanging heat with, the air around the heat exchangers 12 and 12 can be cooled to enhance the heat dissipation of the heat exchangers 12 and 12. *
  • the RO water mist is vaporized by spraying RO water in a fine mist form toward the air around the outdoor unit 1 from each spray nozzle 5, 5.
  • the temperature of the air around the outdoor unit 1 decreases, and the outdoor unit 1 takes in the reduced ambient air and exchanges heat with the heat exchangers 12 and 12 to the outside. Since the exhaust is performed, the heat dissipation characteristics of the heat exchangers 12 and 12 are improved.
  • the heat exchangers 12, 12 can be efficiently used with a small amount of water compared to the case where the water is sprayed directly on the heat exchangers 12, 12.
  • the sprayed RO water is vaporized and dissipated, so it does not adhere directly to the heat exchangers 12 and 12 and can prevent scale adhesion and corrosion. Since it does not fall into the machine 1 and be immersed in water, no means for surplus water treatment is required.
  • the treatment capacities of the reverse osmosis membrane treated water generating means 4 and treated water supply means 6 may be small, and accordingly, the apparatus can be reduced in size and price, and the operating cost (running cost) can be reduced. Can do. *
  • the operation time of the apparatus can be shortened and the amount of RO water to be sprayed can be reduced.
  • the spraying interval of the RO water is not particularly limited for both the spraying time and the stopping time, but after spraying for about 5 seconds, it is preferable to stop for 15 to 30 seconds. Adjust the temperature, humidity and other conditions. Moreover, you may make it spray continuously. *
  • ventilation means such as a fan 13 is disposed on the upper surface portion, and heat exchangers 12 and 12 are disposed on the outer surface of the housing 11, respectively, and ambient air is taken in from the outer surface of the outdoor unit 1, and heat exchange is performed from the upper surface.
  • the electricity consumption reduction rate of the entire cooling device is measured for the examples in which the installation positions and angles of the spray nozzles 5, 5. The cooling assistance effect was verified based on the rate.
  • spray nozzles 5, 5... Three types of spray nozzles 5, 5... (Whose diameters are 0.15 mm, 0.3 mm, 0.5 mm, respectively) are used. The cooling assistance effect due to the difference was also verified. *
  • Example 1 two spray nozzles 5, 5... Are installed at intervals in the horizontal width direction at the upper end of the outer surface of the outdoor unit 1 (FIG. 5A), sprayed for 5 seconds, and then stopped for 30 seconds. The spray interval was repeated. *
  • Example 2 two spray nozzles 5, 5... Are installed at a distance of about 1/3 from the upper end of the overall height of the outdoor unit 1 (FIG. 5B) in the horizontal width direction. The spray interval was stopped for 30 seconds after spraying for 2 seconds. *
  • Example 3 two spray nozzles 5, 5... Are installed at an interval of about 1/3 from the upper end of the overall height of the outdoor unit 1 (FIG. 5B) with a gap in the width direction for 5 seconds. The spraying interval was stopped for 15 seconds after spraying. *
  • Example 4 two spray nozzles 5, 5... Are spaced apart in the horizontal width direction at every height of about 1/3 and about 2/3 from the upper end of the overall height of the outdoor unit 1 (FIG. 5C). The spraying interval was set to rest and sprayed for 5 seconds and then stopped for 30 seconds. *
  • Example 5 two spray nozzles 5, 5... Are spaced apart in the horizontal width direction at every height of about 1/3 and 2/3 from the upper end of the overall height of the outdoor unit 1 (FIG. 5C). The spraying interval was set to rest and sprayed for 5 seconds and then stopped for 15 seconds. The results are shown below. *
  • the efficiency of reducing the amount of electricity used was the highest. That is, the mist particle size of the sprayed RO water has a large effect on cooling assistance, and if the mist particle size is small, it is swept away by the influence of the wind. Becomes difficult to cool.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Le problème décrit par la présente invention est de faire appel à un dispositif d'aide au refroidissement et à un procédé d'aide au refroidissement permettant d'améliorer les caractéristiques de dissipation de la chaleur d'un échangeur de chaleur, sans entartrage ni corrosion de ce dernier tout en réduisant les coûts opérationnels d'introduction du dispositif. La solution selon l'invention concerne un dispositif d'aide au refroidissement (2) utilisé pour améliorer les caractéristiques de dissipation de la chaleur d'un échangeur de chaleur (12) d'une unité extérieure (1) pour un dispositif de refroidissement lorsque l'échangeur de chaleur échange de la chaleur entre un fluide frigorigène et l'air autour de l'unité extérieure afin de condenser le fluide frigorigène, le dispositif d'aide au refroidissement (2) comprenant un moyen (4) de production d'eau traitée par osmose inverse destiné à produire de l'eau traitée par osmose inverse, au moyen d'une membrane d'osmose inverse, à partir de l'eau alimentée par une source d'alimentation en eau (3), des buses d'atomisation (5, 5…) comportant chacune un orifice d'atomisation dirigé vers l'air autour de l'unité extérieure (1), et un moyen d'alimentation en eau traitée (6) destiné à alimenter en eau traitée par osmose inverse, produite par le moyen (4) de production d'eau traitée par osmose inverse, les buses d'atomisation (5) à une pression d'eau souhaitée, l'eau traitée par osmose inverse étant pulvérisée à l'air autour de l'unité extérieure (1) à partir des buses d'atomisation (5, 5…) à une taille souhaitée des particules.
PCT/JP2016/060247 2016-03-29 2016-03-29 Dispositif et procédé d'aide au refroidissement WO2017168591A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021032550A (ja) * 2019-08-29 2021-03-01 ダイキン工業株式会社 空気調和装置の室外機

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55134269A (en) * 1979-04-05 1980-10-18 Tokyo Shibaura Electric Co Water cooling type air conditioner
JP2007271200A (ja) * 2006-03-31 2007-10-18 Chiba Univ 空気調和装置
JP2010243144A (ja) * 2008-12-11 2010-10-28 Water Techno Kasai:Kk 熱交換器の冷却方法
JP2012047390A (ja) * 2010-08-26 2012-03-08 Aisaito:Kk 室外機及びこれを備えた冷却システム
JP2014122728A (ja) * 2012-12-20 2014-07-03 Daikin Ind Ltd 空気調和装置の室外機
JP2014126334A (ja) * 2012-12-27 2014-07-07 Daikin Ind Ltd 空気調和装置の室外機
JP5896331B1 (ja) * 2014-09-05 2016-03-30 クリタ・ケミカル関東株式会社 冷房補助装置及び冷房補助方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55134269A (en) * 1979-04-05 1980-10-18 Tokyo Shibaura Electric Co Water cooling type air conditioner
JP2007271200A (ja) * 2006-03-31 2007-10-18 Chiba Univ 空気調和装置
JP2010243144A (ja) * 2008-12-11 2010-10-28 Water Techno Kasai:Kk 熱交換器の冷却方法
JP2012047390A (ja) * 2010-08-26 2012-03-08 Aisaito:Kk 室外機及びこれを備えた冷却システム
JP2014122728A (ja) * 2012-12-20 2014-07-03 Daikin Ind Ltd 空気調和装置の室外機
JP2014126334A (ja) * 2012-12-27 2014-07-07 Daikin Ind Ltd 空気調和装置の室外機
JP5896331B1 (ja) * 2014-09-05 2016-03-30 クリタ・ケミカル関東株式会社 冷房補助装置及び冷房補助方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021032550A (ja) * 2019-08-29 2021-03-01 ダイキン工業株式会社 空気調和装置の室外機
WO2021039703A1 (fr) * 2019-08-29 2021-03-04 ダイキン工業株式会社 Unité extérieure pour un dispositif de climatisation
JP7356001B2 (ja) 2019-08-29 2023-10-04 ダイキン工業株式会社 空気調和装置の室外機

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