EP3705794A1 - Unité extérieure pour une pompe à chaleur - Google Patents

Unité extérieure pour une pompe à chaleur Download PDF

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Publication number
EP3705794A1
EP3705794A1 EP19161606.9A EP19161606A EP3705794A1 EP 3705794 A1 EP3705794 A1 EP 3705794A1 EP 19161606 A EP19161606 A EP 19161606A EP 3705794 A1 EP3705794 A1 EP 3705794A1
Authority
EP
European Patent Office
Prior art keywords
drainage channel
heat exchanger
bottom plate
outdoor unit
drainage
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.)
Granted
Application number
EP19161606.9A
Other languages
German (de)
English (en)
Other versions
EP3705794B1 (fr
Inventor
Kota Yoshikawa
Wim Vansteenkiste
Akshay Hattiangadi
Jose Daniel Garcia Lopez
Tom Surmont
Rishi Mehta
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.)
Daikin Europe NV
Daikin Industries Ltd
Original Assignee
Daikin Europe NV
Daikin Industries 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 Daikin Europe NV, Daikin Industries Ltd filed Critical Daikin Europe NV
Priority to EP19161606.9A priority Critical patent/EP3705794B1/fr
Priority to PCT/JP2020/009889 priority patent/WO2020184492A1/fr
Publication of EP3705794A1 publication Critical patent/EP3705794A1/fr
Application granted granted Critical
Publication of EP3705794B1 publication Critical patent/EP3705794B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • 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
    • F24F1/36—Drip trays for 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F24F2013/227—Condensate pipe for drainage of condensate from the evaporator

Definitions

  • the present disclosure relates to heat pumps for cooling and/or heating purposes.
  • the disclosure relates to split-type heat pumps comprising an outdoor unit and at least one indoor unit.
  • the disclosure relates to a heat pump using air as heat source.
  • Operating the heat pump in a heating operation may cause the formation of frost at the heat source heat exchanger accommodated in the outdoor unit.
  • a reverse - cycle operation to the heating operation is performed in order to defrost the heat source heat exchanger. Due to the reverse cycle, the heat source heat exchanger functions as a condenser dissipating heat and frost is thawed.
  • the thawed frost (water) flows along the surfaces of the heat source heat exchanger towards a bottom plate comprising a drainage structure in order to drain the water.
  • drainage channel Drainage channel
  • JP S63-178762 U One example of such a drainage structure (drainage channel) is shown in JP S63-178762 U .
  • Those drainage structures are often perceived to not sufficiently guide water collected on an upper side of the bottom plate towards a drainage hole.
  • it had been suggested to provide a plurality of drainage holes such as disclosed in EP 2 333 440 A1 .
  • a plurality of drainage holes our, however, perceived disadvantageous making it more difficult to drain the water to a desired location.
  • an outdoor unit for a heat pump comprises a heat source heat exchanger (outdoor heat exchanger), which in the following is referred to merely as heat exchanger, a heat consumer heat exchanger (indoor heat exchanger), an expansion valve and a compressor connected by refrigerant pipes.
  • the refrigerant circuit may comprise a 4-way switching valve for switching between heating operation and cooling/defrosting operation (reverse cycle operation).
  • the outdoor unit of this aspect comprises a bottom plate.
  • the heat exchanger is supported on the bottom plate.
  • the heat exchanger may in a view perpendicular to the bottom plate be basically L-shaped.
  • the bottom plate comprises a drainage hole.
  • the bottom plate comprises a single drainage hole.
  • an elongated drainage channel is provided.
  • the elongated drainage channel is located below (beneath or underneath) the heat exchanger at least along a portion of the heat exchanger. To put it differently, the heat exchanger and the elongated drainage channel overlap in a top view perpendicular to the bottom plate. Further, the elongated drainage channel slopes towards the drainage hole.
  • the drainage channel may slope respectively from opposite ends relative to the drainage hole towards the drainage hole.
  • the bottom plate has an outer and/or an inner support surface for supporting the heat exchanger.
  • the outer and/or inner support surfaces are formed by a bank of the drainage channel.
  • the "bank" of the drainage channel is to be understood as those surfaces extending respectively from the upper opening of the drainage channel away from the drainage channel in opposite direction to form an inner and an outer support surface with respect to the drainage channel.
  • the heat exchanger is, along more than half of the longitudinal extension of the drainage channel, in contact with at least part of the inner and/or outer support surfaces and thereby supported in a vertical direction. To put it differently, the heat exchanger may sit directly on an upper side of the bottom plate covering at least a portion of the upper opening of the drainage channel.
  • the outdoor unit may be manufactured more cost-effectively with less parts being involved.
  • the width of the drainage channel at a bottom of the drainage channel is at least in portions along the longitudinal extension of the drainage channel smaller than the width of the heat exchanger, wherein the width of the drainage channel is the dimension of the drainage channel in a direction parallel to the bottom plate and perpendicular to the longitudinal extension of the drainage channel and the width of the heat exchanger is the dimension of the heat exchanger in a direction parallel to the bottom plate and perpendicular to the longitudinal extension of the drainage channel.
  • a relatively small cross-section of the drainage channel may be achieved which can assure that, even with low amounts of water being involved, most of the water is reliably guided to the drainage hole and drained to the outside of the outdoor unit.
  • the risk that the remaining water freezes on the bottom plate can be reduced.
  • the width of the drainage channel at an upper opening of the drainage channel is at least in portions along the longitudinal extension of the drainage channel smaller than the width (of a lower side) of the heat exchanger, so that the lower end of the exchanger closes the upper opening of the drainage channel in said portion, wherein the width of the drainage channel is the dimension of the drainage channel in a direction parallel to the bottom plate and perpendicular to the longitudinal extension of the drainage channel and the width of the heat exchanger is the dimension of the heat exchanger in a direction parallel to the bottom plate and perpendicular to the longitudinal extension of the drainage channel.
  • the drainage structure in order to improve the drainage characteristics it is beneficial to embody the drainage structure as a drainage system comprising a plurality of intersecting/interconnected elongated drainage channels. It is to be emphasized that the configuration of the drainage system may also be embodied independently of the feature that "the heat exchanger is, along more than half of the longitudinal extension of the drainage channel, in contact with at least part of the inner and/or outer support surfaces and thereby supported in a vertical direction".
  • the outdoor unit further comprises a fan having a fan support structure and a fan rotor having fan blades.
  • the fan support structure may be directly fixed to an upper side of the bottom plate.
  • the mentioned drainage system comprises a first additional drainage channel in the bottom plate below (below/underneath a lower side of) the fan rotor, more particularly the fan blades.
  • the first additional drainage channel slopes towards an intermediate position of the first additional drainage channel.
  • the first additional drainage channel may have a slope starting at either one of opposite ends of the additional drainage channel sloping towards an intermediate position such as a central position.
  • the first additional drainage channel comprises two portions, the first additional drainage channel sloping in each of the portions towards an intermediate position of the respective portion.
  • fan rotors having a larger diameter may be covered with good water collecting properties without having to significantly increase the height of the bottom plate/depth of the first additional drainage channel.
  • a shallower slope as compared to the sixth aspect may be realized still allowing water (even small amounts of water) to flow towards the drainage channel and drain it from the drainage hole.
  • the outdoor unit further comprises a second additional drainage channel in the bottom plate below the fan support structure.
  • the second additional drainage channel may slope from one end away from the fan support structure towards the fan support structure.
  • water flowing along the fan support structure downwards to the bottom plate may effectively be collected in the drainage system and be drained via the drainage hole outside the outdoor unit.
  • the outdoor unit further comprises a connecting channel connecting the first additional drainage channel and/or the second additional drainage channel with the drainage channel.
  • the connecting channel extends perpendicular to a longitudinal extension of the elongated drainage channel, elongated first additional drainage channel and/or elongated second additional drainage channel.
  • the connecting channel may be connected to the first additional drainage channel at the intermediate position or at the intermediate positions of the two portions mentioned above.
  • the connecting channel may be connected to the second additional drainage channel at the end adjacent the fan support structure to which the second additional drainage channel slopes.
  • a drainage system is realized enabling superior collection and drainage of any water being collected on an upper side of the bottom plate.
  • the angle of inclination of the slope in the drainage channel is smaller than in at least one of the first additional drainage channel, the second additional drainage channel and the connecting channel. Because the amount of water in the first additional drainage channel, the second additional drainage channel and the connecting channel tends to be less than in the drainage channel situated below the heat exchanger and due to the surface tension of the water, it is beneficial that the angle of inclination in those drainage channels is higher to assure that the water actually flows towards the drainage channel and into the drainage hole.
  • opposite side walls in the width direction of the drainage channel/-s slope inwards.
  • the angle between an inner side of the drainage channel/-s and a vertical line resides between 10° and 50° or 15° and 45°.
  • the drainage channel slopes towards a single drainage hole.
  • the bottom plate is a deep drawn part.
  • FIG. 1 shows a perspective view of an outdoor unit 10 of a split type heat pump.
  • the heat pump comprises a refrigerant circuit, at least comprising a heat source heat exchanger 11, a compressor (not visible), a heat consumer heat exchanger (not shown), such as an indoor heat exchanger, and an expansion valve (not visible) connected by refrigerant pipes.
  • the shown outdoor unit 10 comprises an outer casing 13.
  • the outer casing 13 has a bottom plate 14. Feet (not shown) for mounting the outdoor unit on a horizontal surface or via brackets to a vertical wall are fixed to the bottom plate 14. Further, the outer casing 13 has a top plate 16 and a side plate 17. In the shown embodiment, the side plate 17 extends around a rearward corner of the outdoor unit 10 being connected to (integrally formed with/forming a one piece structure with) a back plate 18 of the outer casing 13.
  • the heat source heat exchanger 11 occupies a part of the rear side of the outer casing 13 and the side of the outer casing 13 opposite to the side plate 17.
  • the heat source heat exchanger 11 is "L" - shaped in a top view.
  • the front side of the outer casing 13 is closed by a front panel including a grille 19.
  • the heat source heat exchanger 11 has an upper side 20 facing away from the bottom plate 14 and the lower side 21 facing toward the bottom plate 14. Moreover, the heat source heat exchanger 11 has an inner side 22 and an outer side 23 opposite to the inner side 22.
  • the heat source heat exchanger 11 has a plurality of parallel waffle plates extending from the inner side 22 to the outer side 23 and from the lower side 21 to the upper side 20.
  • a plurality of heat exchanging tubes 24 extend perpendicularly through the waffle plates.
  • the heat exchanger has opposite ends, namely a first end 25 and a second end 26.
  • the width of the heat source heat exchanger 11 is defined between the inner side 22 and the outer side 23.
  • the height of the heat source heat exchanger 11 is defined between the upper side 20 and the lower side 21.
  • the heat source heat exchanger 11 is an elongated heat source heat exchanger, wherein its longitudinal extension is defined between the first and second ends 25 and 26.
  • the heat source heat exchanger 11 is in a top view basically "L” shaped.
  • the heat source heat exchanger 11 has a first portion 27 corresponding to the longer leg of the "L” and a second portion 28 corresponding to the shorter leg of the "L".
  • the bottom plate 14 of the outer casing 13 has an upright outer flange 15 extending around the outer peripheral edge of the bottom plate 14. Accordingly, the bottom plate 14 is formed like a pan.
  • the bottom plate 14 has an upper side 40 and a lower side 41.
  • the lower side 41 serves for mounting the outdoor unit 10 to a horizontal surface or brackets fixed to a vertical wall. For this purpose, feet may be provided at the lower side 41 of the bottom plate 14.
  • the outdoor unit 10 accommodates a fan 30 (see figure 2 ).
  • the fan comprises a support structure 31.
  • the support structure 31, in the present example, comprises two upright columns 32 vertically (perpendicularly) extending from the bottom plate 14. The columns 32 are fixed at their lower end to the upper side 40 of the bottom plate.
  • the fan 30 further comprises a fan motor 33 attached to the support structure 31, particularly the columns 32 at an intermediate position between the opposite ends of the columns 32.
  • a fan rotor 34 is mounted on the fan motor 33 so as to be rotatable about a rotational axis.
  • the fan rotor 34 comprises a plurality of (here three) fan blades 35.
  • the bottom plate 14 further comprises a drainage structure 42.
  • the drainage structure 42 represents a drainage system of a plurality of channels respectively having a slope towards a drainage hole 43 in one of the drainage channels.
  • the drainage structure 42 comprises a single drainage hole 43. Hence, any water being accumulated in the drainage structure is reliably guided to the drainage hole 43 and drained to the outside of the outdoor unit 10.
  • the drainage structure 42 comprises a first drainage channel (drainage channel) extending along the lengths of the heat source heat exchanger 11.
  • the first drainage channel has in a top view as well a "L" shape (see figure 6 ).
  • the drainage channel 44 has a first end 45 and a second opposite end 46.
  • an outer side 47 (the outer side being directed towards the peripheral outer edge of the bottom plate 14) and an inner side 48 (the inner side being opposite to the outer side) of the first drainage channel 44 define its width.
  • the outer side 47 and the inner side 48 of the drainage channel slope from an upper opening 49 of the drainage channel towards a bottom 50 of the drainage channel.
  • the slope angle ⁇ and ⁇ may be different. In other examples the slope angles may be the same. In either case, it is preferred that the slope angle resides in a range between 10° and 50° or 15° and 45°.
  • the bottom 50 of the first drainage channel 44 slopes from the first end 45 and from the second end 46 respectively towards the drainage hole 43, wherein the drainage hole 33 is disposed at an intermediate position between the opposite ends 45 and 46.
  • the first drainage channel 44 mainly serves the purpose of collecting any water flowing along the surfaces of the heat source heat exchanger 11 towards the bottom plate 14 during the defrosting operation.
  • a reverse - cycle operation is performed during which the heat source heat exchanger 11 is functioning as a condenser, whereby any ice formed on the heat source heat exchanger 11 is thawed.
  • This water flows along the surfaces of the heat source heat exchanger 11 downwards to the bottom plate 14 and is primarily collected in the first drainage channel 44.
  • the drainage structure 42 further comprises a second drainage channel (first additional drainage channel) 51.
  • the second drainage channel comprises a first portion 52a and a second portion 52b.
  • Each of the first and second portion 52a, b has opposite ends 53a, b and 54a, b.
  • the bottom 55 of the second drainage channel 51 respectively slopes from the opposite ends 53a, b and 54a, b towards an intermediate position 56.
  • the second drainage channel 51 is positioned underneath (below/underneath a lower side of) the fan rotor 34, more particularly the fan blades 35.
  • Water adhering to the grill 19 or the heat source heat exchanger 11 may be drawn into the outer casing 13 by the air flow produced by the fan 30. This water may come into contact with the fan rotor 34, more particularly the fan blades 35, and be thrown or drop from the fan rotor 34, more particularly the fan blades 35, towards the bottom plate 14.
  • the second drainage channel 51 is configured to collect this water.
  • a third drainage channel 57 (second additional drainage channel) is provided in the bottom plate 14.
  • the third drainage channel 57 may comprise a plurality of portions 57a-b.
  • a first portion 57a is arranged in parallel to the second drainage channel 51 adjacent the fan support structure 31.
  • the first portion 57a has opposite ends 58a, 59a.
  • a bottom 60a of the first portion 57a slopes from the end 58a towards the opposite end 59a, i.e. from a position distanced from the fan support structure 31 towards the fan support structure 31.
  • a second portion 57b is substantially “T” shaped.
  • the vertical leg of the “T” extends parallel to the axis of rotation of the fan rotor 34 and is positioned between the support columns 32 of the fan support structure 31 underneath the fan motor 33.
  • the horizontal leg of the “T” extends perpendicularly thereto and, hence, parallel to the first portion 57a.
  • the second portion 57b has a first end 58b at an end of the vertical leg opposite to the horizontal leg of the "T” and opposite second ends 59b at the respective ends of the horizontal leg of the "T".
  • the bottom of the second portion 57b slopes from the first end 58b towards the second ends 59b.
  • the third drainage channel 57 is configured to collect any water flowing downwards along the fan support structure 32 or dropping down from the fan motor 33 and guide that water towards the first drainage channel 44 and into the drainage hole 43.
  • a fourth drainage channel 61 may be provided in order to connect the second and/or third drainage channel 51 and 57 to the first drainage channel 44.
  • four fourth drainage channels 61a and 61b are provided.
  • Each of the fourth drainage channels has a first end 62a, b and a second end 63a, b.
  • a bottom 64a, b slopes from the respective first ends 62a, b towards the respective second ends 63a, b.
  • Their respective first ends 62a, b merge with the intermediate positions 56 of the first and second portions 52a, b of the second drainage channel 51.
  • the respective second ends 63a, b merge with the first drainage channel 44.
  • the ends 59a and 59b respectively merge with the fourth drainage channel 61.
  • the amount of water reaching the upper side 40 of the bottom plate 14 tends to be less in the area of the fan support structure 31 and the fan rotor 34, more particularly the fan blades 35, as compared to the area underneath the heat source heat exchanger 11. Accordingly, the slope angle (e.g. 3°) of bottoms 55, 60 and 64 of the second, third and fourth drainage channels 51, 57 and 61 is larger than the slope angle (e.g. 2°) of the bottom 50 of the first drainage channel 44.
  • opposite side walls in a width direction of the respective drainage channel 51, 57 and 61 may as well be inclined (slope) towards the bottom 55, 60 and 64 in a similar slope angle range as described with respect to the first drainage channel 44.
  • the entire drainage structure 42 is configured to allow deep drawing of the bottom plate 14.
  • the bottom plate has an outer and/or an inner support surface 70 and 71.
  • the outer support surface 70 and the inner support surface 71 are respectively formed by the bank of the first drainage channel 44.
  • the term "bank” is to be understood as the raised land along the sides of the first drainage channel 44 (similar to a river). To put it differently, it refers to the substantially horizontal side surfaces (bordering the upper edges of the walls on the outer side 47 and the inner side 48) defining the upper opening 49 of the first drainage channel 44.
  • the width at the upper opening 49 is defined by the upper edges of the outer side 57 and the inner side 58.
  • the width at the bottom 50 is defined by the lower edges of the outer side 57 at the inner side 58.
  • the longitudinal dimension (lengths) is defined between the first end 45 and the second end 46.
  • the height is defined between the bottom 50 in the upper opening 49.
  • the first drainage channel 44 as to portions corresponding to the first and second portions 27 and 28 of the heat source heat exchanger 11.
  • the heat source heat exchanger 11 is supported on the bottom plate along more than half of the longitudinal extension of the first drainage channel 44. Particularly, the heat source heat exchanger 11 is supported on at least parts of the outer and/or inner support services 70, 71, respectively.
  • the heat source heat exchanger 11 is not supported on the bottom plate 14 such as the portions where the fourth drainage channels 61 merge with the first drainage channel 44, that is at their second ends 63a, b.
  • Another portion may be the portion where some of the heat exchanging tubes are led out of the heat source heat exchanger 11.
  • the heat source heat exchanger 11 is in any case supported along more than half of the longitudinal extension of the drainage channel and, hence, also of the longitudinal extension of the heat source heat exchanger 11.
  • the support may be interrupted and the support may either be on the inner support surface 71 or the outer support surface 70 or both.
  • the lower side of the heat source heat exchanger 11 is in contact with at least part of the inner and/or outer support services 71 and 70.
  • the width W 2 at the upper opening 49 is at least in parts of the longitudinal extension of the first drainage channel 44 smaller than the width of the lower side 21 of the heat source heat exchanger 11 (see figure 5 ).
  • the lower side 21 of the heat source heat exchanger 11 closes the upper opening 49 of the first drainage channel 44 and is supported on both the inner and outer support surfaces 71 and 70.
  • even more stable support of the heat source heat exchanger 11 in a vertical direction on the upper side 40 of the bottom plate 14 can be realized.
  • the width W 1 at the bottom 50 of the first drainage channel 44 is selected to be smaller than the width of the lower side 41 of the heat source heat exchanger 11 ( figure 5 ). Accordingly the portion in which the water is guided toward the drainage hole 43 is relatively narrow so that even in case of relatively small amounts of water a sufficient water flow towards the drainage hole 43 may be realized and good drainage properties be achieved.
  • the present description of an embodiment is not considered to be limiting. Rather several modifications may be realized by the skilled person.
  • the configuration of the drainage structure as defined in the dependent claims and the above example may also be embodied independently of the feature that the heat source heat exchanger is with its lower side 21 supported on the bank of the drainage channel.
  • the second drainage channel 51 may be a single portion sloping from its opposite ends towards an intermediate position rather than being configured as described above.
  • the third drainage channel 57 may consist of only one of the portions 57a, b.
EP19161606.9A 2019-03-08 2019-03-08 Unité extérieure pour une pompe à chaleur Active EP3705794B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19161606.9A EP3705794B1 (fr) 2019-03-08 2019-03-08 Unité extérieure pour une pompe à chaleur
PCT/JP2020/009889 WO2020184492A1 (fr) 2019-03-08 2020-03-06 Unité extérieure pour pompe à chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19161606.9A EP3705794B1 (fr) 2019-03-08 2019-03-08 Unité extérieure pour une pompe à chaleur

Publications (2)

Publication Number Publication Date
EP3705794A1 true EP3705794A1 (fr) 2020-09-09
EP3705794B1 EP3705794B1 (fr) 2022-08-17

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EP19161606.9A Active EP3705794B1 (fr) 2019-03-08 2019-03-08 Unité extérieure pour une pompe à chaleur

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EP (1) EP3705794B1 (fr)
WO (1) WO2020184492A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178762U (fr) 1987-05-12 1988-11-18
US20110016903A1 (en) * 2006-09-05 2011-01-27 Carrier Corporation Impedance Heating for Heat Exchanger Water Drainage Channels
EP2333440A1 (fr) 2008-08-25 2011-06-15 Sharp Kabushiki Kaisha Climatiseur
EP2719970A2 (fr) * 2012-10-11 2014-04-16 Mitsubishi Heavy Industries, Ltd. Unité d'intérieur de climatiseur
EP2792964A2 (fr) * 2013-04-19 2014-10-22 LG Electronics, Inc. Climatiseur
JP2015061997A (ja) * 2015-01-05 2015-04-02 三菱電機株式会社 空気調和機の室外機
US20160076779A1 (en) * 2014-09-12 2016-03-17 Lg Electronics Inc. Outdoor device for an air conditioner
CN207113067U (zh) * 2017-06-09 2018-03-16 广东美的暖通设备有限公司 空调室外机的底盘及具有其的空调室外机

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178762U (fr) 1987-05-12 1988-11-18
US20110016903A1 (en) * 2006-09-05 2011-01-27 Carrier Corporation Impedance Heating for Heat Exchanger Water Drainage Channels
EP2333440A1 (fr) 2008-08-25 2011-06-15 Sharp Kabushiki Kaisha Climatiseur
EP2719970A2 (fr) * 2012-10-11 2014-04-16 Mitsubishi Heavy Industries, Ltd. Unité d'intérieur de climatiseur
EP2792964A2 (fr) * 2013-04-19 2014-10-22 LG Electronics, Inc. Climatiseur
US20160076779A1 (en) * 2014-09-12 2016-03-17 Lg Electronics Inc. Outdoor device for an air conditioner
JP2015061997A (ja) * 2015-01-05 2015-04-02 三菱電機株式会社 空気調和機の室外機
CN207113067U (zh) * 2017-06-09 2018-03-16 广东美的暖通设备有限公司 空调室外机的底盘及具有其的空调室外机

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EP3705794B1 (fr) 2022-08-17
WO2020184492A1 (fr) 2020-09-17

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