EP3855023A1 - Ventilateur centrifuge, système de conduite d'air et climatiseur - Google Patents

Ventilateur centrifuge, système de conduite d'air et climatiseur Download PDF

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Publication number
EP3855023A1
EP3855023A1 EP19887719.3A EP19887719A EP3855023A1 EP 3855023 A1 EP3855023 A1 EP 3855023A1 EP 19887719 A EP19887719 A EP 19887719A EP 3855023 A1 EP3855023 A1 EP 3855023A1
Authority
EP
European Patent Office
Prior art keywords
centrifugal fan
air duct
air
volute
centrifugal
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
EP19887719.3A
Other languages
German (de)
English (en)
Other versions
EP3855023B1 (fr
EP3855023A4 (fr
Inventor
Leiming LIU
Yunhui Zou
Chunyu CHENG
Mingyang YU
Xiaohong Sun
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.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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 Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Publication of EP3855023A1 publication Critical patent/EP3855023A1/fr
Publication of EP3855023A4 publication Critical patent/EP3855023A4/fr
Application granted granted Critical
Publication of EP3855023B1 publication Critical patent/EP3855023B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/422—Discharge tongues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4246—Fan casings comprising more than one outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0022—Centrifugal or radial fans
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
    • 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
    • F24F13/24—Means for preventing or suppressing noise
    • 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
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/247—Active noise-suppression

Definitions

  • the present application relates to the technical field of air conditioning, in particular, to a centrifugal fan, an air duct system, and an air conditioner.
  • a volute of a centrifugal fan serves to concentrate air flowing out from an impeller, guide an air flow, and convert a part of the kinetic energy of the air into a static pressure by means of diffusing.
  • a gas flow caused by the impeller periodically impacts a volute tongue, and the gas flow periodically passes through a minimum gap between a blade and the volute tongue, resulting in a periodical rotation noise.
  • a conventional volute of the centrifugal fan is generally in a form of a straight volute, and a radius of the volute is constant.
  • a volute of a centrifugal fan used in an air conditioner has the following structure. An impeller is disposed in the volute.
  • the volute includes a front plate, a side plate, a base plate, and a volute tongue.
  • An air inlet is provided on the front plate.
  • the base plate and the front plate face each other.
  • An impeller axis is perpendicular to a plane where the base plate is located.
  • a longitudinal symmetry plane of the volute tongue is parallel to the impeller axis.
  • the longitudinal symmetry plane refers to a plane which equally divides the volute tongue into two symmetrical parts along a direction from an end having the air inlet to an end having the base plate.
  • the volute tongue gap with such a structure i.e., a minimum gap between an outer periphery of the impeller on a cross-section perpendicular to the impeller axis, i.e., a top end of the blade, and the volute tongue, is constant along a direction of the impeller axis. Therefore, because the volute tongue gap is constant along the direction of the axis, a periodic peak noise is generated due to a superposition of noises with a same frequency, resulting in a relatively large noise of rotation of the centrifugal fan having such a structure.
  • centrifugal fan For an air conditioner using a centrifugal fan in the related art, some type of centrifugal fan has two air outlets having relatively large air blowing rates, so that the total blowing rate of the air conditioner is increased. However, the noise is correspondingly increased with the increase of the total blowing rate of the air conditioner.
  • the technical problem to be solved in the present application is how to overcome a defect of a relatively large noise of the centrifugal fan in the prior art, and thus a centrifugal fan, an air duct system, and an air conditioner, which have a relatively small noise, are provided.
  • the present application provides a centrifugal fan including a volute body and a centrifugal fan blade disposed in the volute body.
  • the volute body includes a base plate, a front plate, and a side plate disposed between the base plate and the front plate.
  • An air inlet of the centrifugal fan blade is disposed in the front plate.
  • a volute tongue is defined by the side plate.
  • the volute tongue is inclined from a side of the base plate toward a side of the front plate, and a volute tongue gap is gradually reduced from the side of the base plate to the side of the front plate.
  • a volute tongue gap C at the front plate is smaller than a volute tongue gap D at the base plate, and a difference between the volute tongue gap D and the volute tongue gap C is E.
  • E is 4% to 6% of a diameter of an impeller of the centrifugal fan blade.
  • a curved surface of the volute tongue includes a conic curved surface. Radii of circular arcs corresponding to a volute tongue gap of the volute tongue are gradually reduced from the side of the base plate to the side of the front plate.
  • the radii of the volute tongue are from 15 mm to 20 mm.
  • a diffuser section side surface of a centrifugal air duct of the centrifugal fan is inclined from the side of the base plate toward the side of the front plate.
  • a tangent line passing through a center of the centrifugal fan blade and tangent to a circular arc of the volute tongue located at the base plate is defined as a first tangent line.
  • a tangent line passing through the center of the centrifugal fan blade and tangent to a circular arc of the volute tongue located at the front plate is defined as a second tangent line.
  • An angle formed between projections of the first tangent line and the second tangent line projected onto a plane perpendicular to an axial direction of the centrifugal fan blade is an inclined angle ⁇ . 7 ° ⁇ ⁇ ⁇ 12 ° .
  • L5 denotes a volute opening degree of the air duct of the centrifugal fan.
  • L6 denotes a diffuser section outlet distance of the centrifugal air duct.
  • a ratio of L6 to L5 is M, and 2 ⁇ M ⁇ 3.
  • the present application further provides an air duct system including:
  • an air duct body including a side-A air outlet and a side-B air outlet;
  • centrifugal fans disposed on the air duct body and between the side-A air outlet and the side-B air outlet.
  • the centrifugal fans include at least one first centrifugal fan, the first centrifugal fan is provided with two first air ducts, which are a first side-A air duct in communication with the side-A air outlet and a first side-B air duct in communication with the side-B air outlet, and the centrifugal fan is the above-described centrifugal fan.
  • Two said centrifugal fans are provided and include the first centrifugal fan and a second centrifugal fan.
  • the second centrifugal fan has a second air duct.
  • the second centrifugal fan is disposed proximally to a side A.
  • the first centrifugal fan is disposed proximally to a side B.
  • the second air duct is in communication with the side-A air outlet.
  • a flow guiding chamber is provided at a side of the second centrifugal fan, and the first side-A air duct of the first centrifugal fan communicates with the side-A air outlet by the flow guiding chamber.
  • a volute body of the first centrifugal fan is aligned with the volute body of the second centrifugal fan.
  • the present application further provides an air conditioner including the above-described air duct system.
  • connection should be understood broadly, for example, may be a fixed connection or a detachable connection or an integrative connection, or a mechanical connection or an electric connection, or a direct connection or an indirect connection by means of an intermediate media, or a communication within two elements.
  • installation may be a fixed connection or a detachable connection or an integrative connection, or a mechanical connection or an electric connection, or a direct connection or an indirect connection by means of an intermediate media, or a communication within two elements.
  • This embodiment provides a centrifugal fan, including a volute body 113 and a centrifugal fan blade 200 disposed inside the volute body 113.
  • the volute body 113 includes a base plate 100, a front plate 308, and a side plate 101 disposed between the base plate 100 and the front plate 308.
  • An air inlet of the centrifugal fan blade 200 is disposed in the front plate 308.
  • a volute tongue 309 is defined by the side plate 101.
  • the volute tongue 309 is inclined from a side of the base plate 100 toward a side of the front plate 308, and a volute tongue gap is gradually reduced from the side of the base plate 100 to the side of the front plate 308.
  • a volute tongue gap C at the front plate 308 is smaller than a volute tongue gap D at the base plate 100, and a difference between the volute tongue gap D and the volute tongue gap C is E.
  • E is 4% to 6% of a diameter of an impeller of the centrifugal fan blade 200.
  • a curved surface of the volute tongue 309 is a conic curved surface. Radii of circular arcs corresponding to the volute tongue gap of the volute tongue 309 are gradually reduced linearly from the side of the base plate 100 to the side of the front plate 308. The radii of the volute tongue 309 are from 15 mm to 20 mm.
  • a diffuser section side surface 310 of a centrifugal air duct of the centrifugal fan is inclined from the side of the base plate 100 toward the side of the front plate 308.
  • a tangent line, which passes through a center of the centrifugal fan blade 200 and is tangent to a circular arc of the volute tongue 309 located at the base plate 100, is defined as a first tangent line.
  • a tangent line, which passes through the center of the centrifugal fan blade 200 and is tangent to a circular arc of the volute tongue 309 located at the front plate 308, is defined as a second tangent line.
  • the side plate 101 includes a first side plate 311 arranged vertically and a second side plate 312 inclined relative to the first side plate 311.
  • L5 denotes a volute opening degree of the air duct of the centrifugal fan, and is a minimum distance from the centrifugal fan blade to the first side plate 311.
  • L6 denotes a diffuser section outlet distance of the centrifugal air duct, and is a minimum distance from the volute tongue 309 to the second side plate 312.
  • a ratio of L6 to L5 is M, and 2 ⁇ M ⁇ 3.
  • interferences between an air flow at the outlet of the centrifugal fan blade 200 and the static volute body 113 are different due to different spatial distances, and different noise frequency spectrums are generated, thereby effectively decreasing the aerodynamic noise of the centrifugal fan, avoiding a whistling sound caused by the resonance effect of the same frequency noises , improving the sound quality of the centrifugal fan, and effectively decreasing the total amount of noises of the centrifugal fan.
  • the present embodiment further provides an air duct system, including an air duct body and a plurality of centrifugal fans disposed on the body.
  • the centrifugal fans each adopt the centrifugal fan described above.
  • the air duct body includes a side-A air outlet 302 and a side-B air outlet 303.
  • the side A is an upper side
  • the side B is a lower side.
  • the centrifugal fans include a first centrifugal fan 300 and a second centrifugal fan 301.
  • the first centrifugal fan 300 is provided with two first air ducts, i.e., a first side-A air duct 304 in communication with the side-A air outlet 302 and a first side-B air duct 305 in communication with the side-B air outlet 303, respectively.
  • the second centrifugal fan 301 has a second air duct 306.
  • the second centrifugal fan 301 is disposed proximally to the side A
  • the first centrifugal fan 300 is disposed proximally to the side B.
  • the second air duct 306 is in communication with the side-A air outlet 302.
  • a flow guiding chamber 307 is provided at a side of the second centrifugal fan 301 to communicate the first side-A air duct 304 of the first centrifugal fan 300 with the side-A air outlet 302. As shown in FIG. 2 , the volute body 113 of the first centrifugal fan 300 is aligned with the volute body 113 of the second centrifugal fan 301.
  • centrifugal fans are disposed on the air duct body, and one or more centrifugal fans are configured as the first centrifugal fan 300 having two air ducts.
  • the side A is a lower side
  • the side B is an upper side.
  • the first centrifugal fan 300 located at the upper side has two air ducts, i.e., the first side-A air duct 304 in communication with the side-A air outlet 302 and a first side-B air duct 305 in communication with the side-B air outlet 303, respectively.
  • the second centrifugal fan 301 located at the lower side has the second air duct 306, and the second air duct 306 is in communication with the side-A air outlet 302.
  • the first centrifugal fan 300 may blow air upward and downward simultaneously, and the second centrifugal fan 301 may blow air downward, thereby increasing the total air blowing rate, while the mutual interference between air flows, occurring when both the upper and lower centrifugal fans blow air upward and downward, is avoided.
  • a proportion of the downward air blowing rate is relatively large, the "blanket-like" heating effect can be improved, and the accumulation of the hot air in an upper region in a room can be avoided, thereby increasing the comfort of the human body and providing a more comfortable experience for the user.
  • This embodiment provides an air conditioner having the air duct system provided in the first embodiment 1 or the second embodiment.
  • the air conditioner has a relatively large air blowing rate and makes a relatively small noise.
  • this embodiment provides a volute structure including a volute body 113.
  • the volute body 113 includes a base plate 100 and a side plate 101 disposed on the base plate 100.
  • a receiving chamber 103 configured to mount a fixing end 102 of a motor 110, and a connecting member, configured to connect a motor bracket 104, are disposed in a region on the base plate 100, and the region is surrounded by the side plate 101.
  • a motor mounting plate and the volute body 113 are directly integrated together, therefore not only a development cost for additionally developing and manufacturing a new mould is saved, but also a manual transfer and a process of screw fixation for the newly added parts are omitted, thereby increasing the mounting efficiency. Moreover, after the motor mounting plate and the volute body 113 are integrated together, an abnormal sound problem caused by the friction between the motor mounting plate and the volute body will not occur, thereby improving the user's experience and enhancing the comfort.
  • one end of the receiving chamber 103 is arranged to protrude from an inner side wall of the base plate 100.
  • the base plate 100 is further provided with a first reinforcing structure thereon to reinforce the protruding end of the receiving chamber 103.
  • the first reinforcing structure preferably includes a first ring-shaped reinforcing rib 105 arranged to surround the receiving chamber 103, and a first connection reinforcing rid 106 which has one end connected to a side wall of the protruding end of the receiving chamber 103 and another end connected to the first ring-shaped reinforcing rib 105.
  • a reinforcing structure can reliably reinforce the protruding end of the receiving chamber 103 in four directions of the front, the rear, the left, and the right directions, thereby preventing the fixing end 102 from shaking in the receiving chamber 103.
  • the connecting member may have various structures.
  • the connecting member preferably includes a plurality of connecting posts 107.
  • the connecting posts are disposed on the inner side of the base plate 100, surround the receiving chamber 103 and protrude from the inner wall.
  • the connecting posts 107 each are provided with a threaded hole, and are located at an outer side of the first ring-shaped reinforcing rib 105.
  • Four feet of the motor bracket are screwed onto four connecting posts 107 by means of screws, respectively.
  • the base plate 100 is further provided with a second reinforcing structure thereon for reinforcing the connecting posts 107.
  • the second reinforcing structure includes:
  • Such a reinforcing structure can reliably reinforce the connecting post 107 in the four directions of the front, the rear, the left, and the right directions, thereby preventing the connecting post 107 from shaking under an external force.
  • a plurality of reinforcing blocks 111 are further disposed on the base plate 100, surround the second ring-shaped reinforcing rib 108, and are spaced from each other.
  • the reinforcing blocks 111 are arranged to reinforce the base plate 100.
  • each of the reinforcing blocks 111 is connected to an outer wall of the second ring-shaped reinforcing rib 108.
  • the reinforcing blocks 111 can simultaneously reinforce the second ring-shaped reinforcing rib 108, ensuring the stability and the reliability of the connecting posts.
  • a centrifugal fan of this embodiment includes a centrifugal fan blade 200, the motor 110 and the motor bracket 104.
  • the centrifugal fan further includes the above-described volute structure.
  • the fixing end 102 of the motor 110 is mounted in the receiving chamber 103.
  • An output shaft of the motor 110 passes through the motor bracket 104 and is connected to the centrifugal fan blade 200.
  • the motor bracket 104 is connected to the connecting member to fix the motor 110 onto the volute structure.
  • the centrifugal fan has the above-described volute structure, therefore the generation of the abnormal sound is avoided, the user's experience is good, and the comfortability is high.
  • An air conditioner of this embodiment has the above-described centrifugal fan. Not only the generation of the abnormal sound is avoided, but also the comfort is high, and the development cost is low.
  • the fixing end 102 provided with an anti-vibration rubber of the motor 110 is mounted into the receiving chamber 103 on the volute structure, then the output shaft of the motor 110 goes through a through hole of the motor bracket 104, and the motor bracket 104 is fixedly connected onto the base plate 100 of the volute structure, so that the fixing end 102 is pressed against the receiving chamber 103, thereby locking the motor 110.
  • the centrifugal fan blade 200 is mounted onto the output shaft of the motor 110, and finally a nut 112 provided with a washer is screwed into the output shaft of the motor 110 to lock the centrifugal fan blade 200.
  • a heat exchanger fan assembly includes a centrifugal fan and a heat exchanger 201.
  • the centrifugal fan includes a centrifugal fan blade 200 having a diameter L2.
  • the heat exchanger 201 is disposed at an air inlet side of the centrifugal fan.
  • the heat exchanger 201 has a width L1.
  • L2 ⁇ L1 needs to be satisfied.
  • a ratio of the width of the heat exchanger 201 to the diameter of the centrifugal fan blade 200 is F.
  • the heat exchanger 201 adopts a bent heat exchanger 201.
  • a surface of the heat exchanger 201 proximate to the centrifugal fan blade 200 is a downward concave surface, and the width L1 of the heat exchanger 201 is defined as a distance between two endpoints of the concave surface in a direction parallel to an end portion of the centrifugal fan blade 200.
  • a distance from a lowest point of concave surface to the air inlet side of the centrifugal fan blade 200 is L3, and L3 ⁇ L2.
  • a ratio of L2 to L3 is G, in order to enable the air to smoothly pass through the heat exchanger 201 while ensuring an optimal surface air speed of the heat exchanger 201, 1.5 ⁇ G ⁇ 1.77 needs to be satisfied.
  • the concave surface is a curved surface.
  • an air inlet angle of the centrifugal fan blade 200 is ⁇ , 135° ⁇ 145°, and ⁇ is defined as an angle between two straight lines connecting a center of the centrifugal fan blade 200 and two ends of a diameter of an end face of the centrifugal fan blade 200, respectively. In this case, an effective heat exchanging area of the heat exchanger 201 is ensured.
  • the ratio of the width of the heat exchanger 201 to the diameter of the centrifugal fan blade 200 satisfies 0.8 ⁇ F ⁇ 1, and the ratio of L2 to L2 satisfies 1.5 ⁇ G ⁇ 1.77, thus an optimal wind field is formed under the cooperation between the centrifugal fan and the heat exchanger 201, the air uniformly exchanges heat with the heat exchanger 201, and the capacity of the heat exchanger 201 is be fully utilized.
  • the heat exchanger 201 does not adopt the bent heat exchanger, and the width of the heat exchanger 201 is defined as a distance between two endpoints of the heat exchanger 201 proximate to the centrifugal fan blade 200 and in the direction parallel to the end of the centrifugal fan blade 200.
  • This embodiment further provides an air conditioner including the above-described heat exchanger fan assembly. Since the heat exchanging performance of the heat exchanger 201 is relatively good, the air conditioner also has a relatively good performance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP19887719.3A 2018-11-20 2019-10-12 Ventilateur centrifuge, système de conduite d'air et climatiseur Active EP3855023B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811389839.3A CN111197584A (zh) 2018-11-20 2018-11-20 一种离心风机、风道系统及空调
PCT/CN2019/110757 WO2020103602A1 (fr) 2018-11-20 2019-10-12 Ventilateur centrifuge, système de conduite d'air et climatiseur

Publications (3)

Publication Number Publication Date
EP3855023A1 true EP3855023A1 (fr) 2021-07-28
EP3855023A4 EP3855023A4 (fr) 2022-01-12
EP3855023B1 EP3855023B1 (fr) 2023-11-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19887719.3A Active EP3855023B1 (fr) 2018-11-20 2019-10-12 Ventilateur centrifuge, système de conduite d'air et climatiseur

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EP (1) EP3855023B1 (fr)
CN (1) CN111197584A (fr)
WO (1) WO2020103602A1 (fr)

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CN115978642B (zh) * 2022-12-21 2024-06-04 珠海格力电器股份有限公司 一种空调
CN115978769B (zh) * 2022-12-21 2024-08-23 珠海格力电器股份有限公司 一种风道结构及具有其的空调
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