WO2021135696A1 - Unité extérieure pour un conditionneur d'air - Google Patents

Unité extérieure pour un conditionneur d'air Download PDF

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Publication number
WO2021135696A1
WO2021135696A1 PCT/CN2020/129501 CN2020129501W WO2021135696A1 WO 2021135696 A1 WO2021135696 A1 WO 2021135696A1 CN 2020129501 W CN2020129501 W CN 2020129501W WO 2021135696 A1 WO2021135696 A1 WO 2021135696A1
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WO
WIPO (PCT)
Prior art keywords
blade
stage fan
fan blade
tip
rotation axis
Prior art date
Application number
PCT/CN2020/129501
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English (en)
Chinese (zh)
Inventor
张龙新
胡斯特
詹东文
闫嘉超
陈鹏
Original Assignee
广东美的白色家电技术创新中心有限公司
美的集团股份有限公司
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Application filed by 广东美的白色家电技术创新中心有限公司, 美的集团股份有限公司 filed Critical 广东美的白色家电技术创新中心有限公司
Publication of WO2021135696A1 publication Critical patent/WO2021135696A1/fr

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    • 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
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/007—Axial-flow pumps multistage 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
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage 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
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • F04D19/024—Multi-stage pumps with contrarotating parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • F04D19/026—Multi-stage pumps with a plurality of shafts rotating at different speeds
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F04D29/386—Skewed blades
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • 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
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • 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
    • F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
    • 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
    • F24F1/40—Vibration or noise prevention at outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/307—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the tip of a rotor blade

Definitions

  • This application relates to the technical field of air conditioning equipment, and specifically to an outdoor unit of an air conditioner.
  • the counter-rotating fan is mainly used in coal mine ventilation, while the application cases in central air conditioning are very rare.
  • central air-conditioning due to the existence of over-current components such as electric control boxes and brackets, the airflow conditions at the inlet of the fan are extremely complicated. Under such complicated airflow conditions, the flow loss and aerodynamic noise caused by the leakage of the rotor blade tip become more and more obvious. .
  • This application aims to solve at least one of the technical problems existing in the prior art or related technologies.
  • one purpose of this application is to propose an air conditioner outdoor unit.
  • the present application provides an outdoor unit of an air conditioner, including: a drive assembly, the drive assembly is provided with a first output shaft and a second output shaft; a first-stage fan blade, the first-stage fan blade is in phase with the first output shaft Connection, the first stage fan blade includes a plurality of first blades; the second stage fan blade, the second stage fan blade is connected with the second output shaft, the second stage fan blade includes a plurality of second blades, the first stage fan blade The direction of rotation of the second stage fan blades is opposite; the first tip winglet, the first tip winglet is connected to at least part of the first tip of the first blade; and/or the second tip winglet, the second The tip winglet is connected to at least a part of the second tip of the second blade, wherein, along the flow direction of the airflow, the first stage fan blade is the upstream fan blade, and the second stage fan blade is the downstream fan blade.
  • the outdoor unit of the air conditioner provided by the present application drives the two-stage fan blades with opposite directions through the output shaft provided by the drive assembly, and provides tip winglets on at least part of the tips of the two-stage fan blades, which realizes the use of blades on the counter-rotating fan.
  • the tip winglet improves the flow condition in the tip area of the rotor, reduces the noise generated by the rotation of the rotor, and improves the aerodynamic and acoustic performance of the fan.
  • the first-stage fan blade is the upstream fan blade
  • the second-stage fan blade is the downstream fan blade.
  • the first output shaft and the second output shaft provided by the drive assembly have the same axis of rotation and turn to
  • the first-stage fan blades and the second-stage fan blades are respectively driven to rotate in opposite directions, which realizes the counter-rotation of the two-stage fan blades, improves the performance, and provides higher wind pressure for the airflow, thereby greatly improving Increased the air supply capacity.
  • tip winglets are respectively arranged on at least part of the tips of the two-stage fan blades, and the length of the tip winglets can be set according to different situations.
  • the use of the tip winglet reduces the driving pressure difference of the tip leakage flow and increases the resistance along the way, effectively reducing the mixing effect between the leakage flow vortex and the main flow, and improving the flow condition in the tip area of the rotor. Also reduces aerodynamic noise.
  • the fan blade includes a hub and a blade, the hub is connected to the motor, the blade is arranged on the peripheral side of the hub, one end of the blade connected to the hub is the blade root, and the other end of the blade opposite to the blade root is the tip.
  • the outdoor unit of the air conditioner in the above technical solution provided by this application may also have the following additional technical features:
  • the length of the first blade is L1; in the direction perpendicular to the rotation axis of the first stage fan blade, the first blade tip is small
  • the height h1 of the wing is the length of the connecting end between the first tip winglet and the first tip; h1 is less than or equal to 10% of L1; and/or along the direction perpendicular to the axis of rotation of the second stage blade, the first The length of the two blades is L2; along the direction perpendicular to the axis of rotation of the second-stage fan blade, the height h2 of the second tip winglet is the length of the connecting end of the second tip winglet and the second tip; h2 Less than or equal to 10% of L2.
  • the length of the blade refers to the length from the tip to the root of the blade along the direction perpendicular to the axis of rotation of the blade.
  • the height of the tip winglet refers to the extension length of the connecting end of the tip winglet and the blade tip. Therefore, the height h1 of the first tip winglet is set to be less than or equal to 10% of the length L1 of the first blade, and/or the height h2 of the second tip winglet is less than or equal to the length L2 of the second blade. 10%.
  • the tip winglet will not be too large to have a negative effect on the flow of gas.
  • the outdoor unit of the air conditioner further includes: an air guide ring, along the direction perpendicular to the rotation axis of the first-stage fan blades, the first-stage fan blades and the second-stage fan blades are in the first-stage fan
  • the projection on the rotation axis of the blade is located in the projection of the air guide ring on the rotation axis of the first-stage fan blade.
  • the first-stage fan blade and the second-stage fan blade are arranged in the air guide ring, that is, along the direction perpendicular to the rotation axis of the first-stage fan blade, the first-stage fan blade and the second-stage fan blade
  • the projection on the rotation axis of the first-stage fan blade is located in the projection of the air guide ring on the rotation axis of the first-stage fan blade.
  • the wind guide ring includes: a wind ring body, the wind ring body is configured to have an air outlet, the second stage fan blades are located in the wind ring body, and the first stage fan blades are partially located in the wind ring body.
  • the constriction part the constriction part is connected with the wind ring body, and part of the first-stage fan blades are located in the constriction part; wherein, along the flow direction of the airflow, the cross-sectional area of the constriction part gradually decreases.
  • the wind guide ring is provided with a wind ring main body and a contraction part.
  • the air outlet end of the main body of the wind ring is used to discharge the air flow.
  • the second-stage fan blades are completely covered by the wind ring main body, and the first-stage fan blades are not completely covered by the wind ring main body due to the arrangement of the constricted part.
  • the cross-sectional area of the constriction section along the direction perpendicular to the rotation axis of the first-stage fan blade is gradually reduced along the flow direction of the airflow. It can be understood that the air inlet end of the contraction part expands outward, which is beneficial to the collection and introduction of airflow.
  • the length of the wind ring body corresponding to the first-stage fan is L3, and the axial direction of the first blade of the first-stage fan
  • the height is H; the ratio of L3 to H ranges from 0.4 to 0.6.
  • the value range of the ratio of L3 to H is further set to be 0.4 to 0.6. Set a value within this range to make the air guide ring partially cover the first-stage fan blades.
  • the first blade can meet the air supply requirements, and on the other hand, it can make the first blade have enough length to set the tip winglet, and realize the improvement of airflow. Uniformity and noise reduction effect. This setting fully considers the influence of the coverage of the air guide ring on the tip winglets.
  • the area covered by the first blade tip by the wind ring body refers to the direction perpendicular to the rotation axis of the first stage fan blade, and the projection of the first blade tip on the rotation axis of the first stage fan blade is located in the wind ring body on the second stage.
  • the area within the projection on the axis of rotation of the primary fan blade refers to the direction perpendicular to the rotation axis of the first stage fan blade, and the projection of the first blade tip on the rotation axis of the first stage fan blade is located in the wind ring body on the second stage.
  • the contour line of the end surface of the connecting end of the first tip winglet and the first blade includes a straight section; A projection point of an end point on the rotation axis of the first-stage fan blade, and a projection point on the rotation axis of the first-stage fan near the connection point of the constriction and the main body of the wind ring.
  • a part of the contour line of the end surface of the connecting end of the first tip winglet and the first blade is a straight section, and the straight section and the corresponding end surface contour line of the free end of the first tip winglet The distance is equal.
  • the projection point of one end point of the straight section on the rotation axis of the first stage fan is close to the projection point of the connection point of the constriction and the main body of the wind ring on the rotation axis of the first stage fan, which makes the blade tip large Part or whole is covered by the wind guide ring.
  • the projection point of one end of the straight section on the rotation axis of the first stage fan blade is F1;
  • the projection point of the connection point of the ring body on the rotation axis of the first stage fan blade is S;
  • the projection length of the tip of the first stage fan blade on the rotation axis is L4;
  • the axial direction between the projection point F1 and the projection point S The distance is less than or equal to 10% of the projection length L4.
  • the projection point of one end of the straight section on the rotation axis of the first-stage fan blade is F1; the connection point between the constriction and the main body of the wind ring
  • the projection point on the rotation axis of the first-stage fan blade is S; the projection length of the tip of the first-stage fan blade on the rotation axis is L4. Therefore, it is further set that the axial distance between the projection point F1 and the projection point S is less than or equal to 10% of the projection length L4, so that most or the whole of the tip winglet is covered by the air guide ring, and the tip winglet With sufficient length, it has the effect of improving uneven airflow and reducing noise.
  • the projection point of the other end point of the straight section on the rotation axis of the first stage fan blade is F2;
  • the projection point on the axis of rotation of the end point of the tip of the first-stage fan blade close to the second-stage fan blade is B; the axial distance between the projection point F2 and the projection point B is less than or equal to 20% of the projection length L4.
  • the projection point of the other end of the straight section on the rotation axis of the first-stage fan blade is F2;
  • the projection point on the axis of rotation of the end point of the tip close to the second-stage fan blade is B. Therefore, it is further set that the axial distance between projection point F2 and projection point B is less than or equal to 20% of the projection length L4, so that the length of the tip winglet does not exceed the length of the tip, and it is set according to the actual air flow.
  • the length of the tip winglet is determined within the range, so that the setting of the tip winglet has the effect of improving uneven airflow and reducing noise.
  • the thickness value of the first tip winglet corresponding to the straight section is equal; and/or the thickness value of the first tip winglet corresponding to the straight section is equal to the thickness of the first blade The maximum thickness value in.
  • the thickness values of the first tip winglets corresponding to the straight section are equal, which facilitates processing and manufacturing.
  • the thickness value of the first tip winglet corresponding to the straight section may be further set to be equal to the maximum thickness value among the thicknesses of the first blade. In this way, the main body of the tip winglet has a sufficient thickness to meet the strength requirements of the tip winglet.
  • the contour line of the end surface of the connecting end of the first tip winglet and the first blade further includes: a first curve segment and a second curve segment; the first curve segment and the second curve segment are respectively The two ends of the straight section are connected, and the other ends of the first curve section and the second curve section are connected with the first blade.
  • one ends of the first curve section and the second curve section are respectively connected to the two ends of the straight section, so that the first tip winglet and the first blade are smoothly transitioned, which is beneficial to reduce the impact of the airflow .
  • the distance between the first curve segment and the second curve segment and the end contour line of the free end of the corresponding first tip winglet gradually increases from the end contour line corresponding to the straight section to both sides of the first tip winglet. Decrease.
  • the contour line of the end surface of the connecting end of the second blade tip winglet and the second blade includes a third curve segment, a first arc line segment, and a second arc line segment, and the first arc line segment And the second arc segment is located at both ends of the third curve segment.
  • the distance between the contour line of the free end of the second tip winglet corresponding to the third curve segment and the third curve segment is equal, and one end of the first arc segment and the second arc segment are respectively connected to the third curve segment.
  • the two ends of the third curve section are connected so that the second tip winglet has an outer edge similar to that of the first tip winglet, so that the arrangement of the second tip winglet also has the effect of improving uneven airflow and reducing noise .
  • the projection point of an end point of the third curve segment on the rotation axis of the second stage fan blade is R1;
  • the projection point of the tip of the first-stage fan blade on the axis of rotation is C;
  • the projection point of the tip of the second-stage fan blade on the rotation axis is L5;
  • the projection point R1 and the projection point C are The axial distance between the two is less than or equal to 10% of the projection length L5, and greater than 5%;
  • the projection point R2 of the other end point of the third curve segment on the rotation axis of the second-stage fan blade, and the second-stage fan blade The distance between the projection point D on the axis of rotation between the end point on the other side of the blade tip is less than or equal to 20% of the projection length L5.
  • the projection point of one end of the third curve segment on the rotation axis of the second-stage fan blade is R1;
  • the projection point on the axis of rotation of the end of the tip close to the side of the first stage fan blade is C;
  • the projection length of the tip of the second stage fan blade on the rotation axis is L5.
  • the axial distance between the projection point R1 and the projection point C is less than or equal to 10% of the projection length L5 and greater than 5% of the projection length L5; the other end of the third curve segment is at the second stage fan blade
  • the distance between the projection point R2 on the axis of rotation and the projection point D on the axis of rotation of the end point on the other side of the tip of the second-stage fan blade is less than or equal to 20% of the projection length L5, so that the second blade
  • the tip winglet is at a suitable position of the tip of the second stage fan blade and has a sufficient length, so that the arrangement of the second tip winglet also has the effect of improving uneven airflow and reducing noise.
  • the first-stage fan blade is axially sectioned with a circle centered on the rotation axis of the first-stage fan blade, and the first blade
  • the cross-sectional shape of the second-stage fan blade is a blade type; and/or along the direction of the second-stage fan blade's axis of rotation, the second-stage fan blade is axially cross-sectioned by a circle centered on the second-stage fan blade's rotation axis center.
  • the cross-sectional shape is a leaf shape.
  • the maximum thickness of the thickness of the first blade is located at 8% to 15% of the length of the cross-sectional shape of the first blade; and/or along the length direction of the cross-sectional shape of the second blade , The maximum thickness of the thickness of the second blade is located at 8% to 15% of the length of the cross-sectional shape of the second blade; the maximum thickness value of the thickness of the first blade ranges from the length of the cross-sectional shape of the first blade 15% to 30%; and/or the maximum thickness value in the thickness of the second blade ranges from 15% to 30% of the length of the cross-sectional shape of the second blade.
  • the cross-sectional shape of the first blade and the cross-sectional shape of the second blade are set to a bionic leaf shape. Further, along the length direction of the cross-sectional shape of the first blade, the maximum thickness of the first blade is located at 8% to 15% of the length of the cross-sectional shape of the first blade; and/or along the length direction of the cross-sectional shape of the second blade , The maximum thickness of the thickness of the second blade is located at 8% to 15% of the length of the cross-sectional shape of the second blade.
  • the change of the blade tip and the thickness of the bionic leaf shape makes the blade streamlined, which is beneficial to reduce the resistance of airflow.
  • the maximum thickness of the first blade is close to the leading edge of the first blade; the maximum thickness of the second blade is close to the leading edge of the second blade.
  • the position of the maximum thickness of the blade is placed on the leading edge of the blade, so that the airflow first contacts the maximum thickness of the blade, and the leading edge of the blade has sufficient strength to bear the impact of the airflow.
  • the leading edge of the blade refers to the side of the blade in the direction in which the airflow enters.
  • the first tip winglet is located on the suction surface side and/or the pressure surface side of the first blade; and/or the second tip winglet is located on the suction surface side and/or the suction surface side of the second blade. / Or the pressure side.
  • the tip winglet can be arranged on the suction surface side of the blade, and the tip winglet can also be arranged on the pressure surface side of the blade.
  • the pressure surface side of the blade refers to the side of the blade facing the airflow entering direction
  • the suction side of the blade refers to the side of the blade facing away from the airflow entering direction.
  • the tip winglets can be separately arranged on the suction side, or can be arranged on the suction side and the pressure side at the same time.
  • the specific setting method needs to be determined according to the air flow, so that the tip winglet has a high degree of flexibility to adapt to different application conditions.
  • the drive assembly includes: a first motor, the first motor is provided with a first output shaft; a first motor support, the first motor is provided on the first motor support; the second motor, the first motor The second motor is provided with a second output shaft; a second motor support, and the second motor is provided on the second motor support.
  • the drive components are respectively composed of two groups of different motors with independent output shafts and fixed on independent motor supports.
  • the corresponding two output shafts are driven to have opposite rotation directions, and the first-stage fan blades and the second-stage fan blades connected to the two output shafts are further driven to form a counter-rotation, so as to enter the air conditioner
  • the airflow pressure of the outdoor unit is increased, which improves the air supply capacity.
  • the drive assembly includes: a motor, the motor is provided with a first output shaft and a second output shaft; a motor support, the motor is provided on the motor support.
  • the drive assembly is composed of a motor and a corresponding motor support, wherein the motor is provided with a first output shaft and a second output shaft, and the directions of the first output shaft and the second output shaft rotate in opposite directions.
  • Two output shafts with different rotation directions are driven by the same motor, which further drives the first-stage fan blades and the second-stage fan blades connected to the two output shafts to form a counter-rotation, thereby increasing the airflow pressure into the outdoor unit of the air conditioner.
  • the air supply capacity is improved, and the internal space of the outdoor unit of the air conditioner is saved.
  • the second aspect of the present application proposes an air conditioner, including the outdoor unit of the air conditioner in any of the above technical solutions.
  • the air conditioner proposed in this application includes the air conditioner outdoor unit in any of the above technical solutions, and therefore has all the beneficial effects of the aforementioned fan or air conditioner outdoor unit.
  • Fig. 1 is a partial structural diagram of an outdoor unit of an air conditioner according to an embodiment of the present application
  • Fig. 2 is a schematic structural diagram of a first-stage fan blade according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of the structure of a second-stage fan blade according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of the positional relationship among the air guide ring, the first-stage fan blade and the second-stage fan blade according to an embodiment of the present application;
  • Fig. 5 is a corresponding axial cross-sectional view of the first-stage fan blade and the second-stage fan blade shown in Fig. 4;
  • FIG. 6 is a schematic cross-sectional view of the first blade and the first tip winglet according to an embodiment of the present application
  • Fig. 7 is a schematic sectional view of the second blade and the second tip winglet according to an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of an outdoor unit of an air conditioner according to an embodiment of the present application.
  • Fig. 9 is a schematic cross-sectional structural view of the outdoor unit of the air conditioner in the embodiment shown in Fig. 8.
  • Air conditioner outdoor unit 102 first motor, 104 first motor bracket, 106 second motor, 108 second motor bracket, 202 first-stage fan blade, 204 first blade, 206 first tip winglet, 208 first Blade tip, 210 first blade root, 302 second stage fan blade, 304 second blade, 306 second tip winglet, 308 second blade tip, 310 second blade root, 400 wind guide ring, 402 wind ring main body , 404 shrink part, 500 electric control box, 600 shell, 700 heat exchanger, 900 shell cover.
  • the embodiment of the first aspect of the present application provides an air conditioner outdoor unit 1, including: a driving assembly, a first-stage fan blade 202, and a second-stage fan blade 302, the first tip winglet 206, and the second tip winglet 306.
  • the drive assembly is provided with a first output shaft and a second output shaft;
  • the first stage fan blade 202 is connected with the first output shaft, the first stage fan blade 202 includes a plurality of first blades 204;
  • the second stage fan blade 302 Connected to the second output shaft, the second-stage fan blade 302 includes a plurality of second blades 304, and the rotation direction of the first-stage fan blade 202 is opposite to that of the second-stage fan blade 302 during operation;
  • the first blade tip winglet 206 is connected to at least part of the first tip 208 of the first blade 204;
  • the second tip winglet 306 is connected to at least part of the second tip 308 of the second blade 304, wherein, along the flow direction of the airflow, the first The first stage fan blade 202 is an upstream fan blade, and the second stage fan blade 302 is a downstream fan blade.
  • the air conditioner outdoor unit 1 provided by the present application drives two-stage fan blades with opposite directions through the output shaft provided by the drive assembly, and blade tip winglets are provided on at least part of the tips of the two-stage fan blades, which realizes the counter-cyclone
  • the blade tip winglet is used on the aircraft to improve the flow conditions in the tip area of the rotor, reduce the noise generated by the rotation of the rotor, and improve the aerodynamic and acoustic performance of the counter-rotating fan.
  • the first-stage fan blade 202 is an upstream fan blade
  • the second-stage fan blade 302 is a downstream fan blade.
  • the first output shaft and the second output shaft provided by the drive assembly have the same rotation axis.
  • the direction of rotation is reversed, respectively driving the first-stage fan blade 202 and the second-stage fan blade 302 to rotate in opposite directions, which realizes the counter-rotation of the two-stage fan blades, improves the work force, and provides higher wind pressure for the airflow. , Thereby greatly improving the air supply capacity.
  • tip winglets are respectively arranged on at least part of the tips of the two-stage fan blades, and the length of the tip winglets can be set according to different situations.
  • the use of the tip winglet reduces the driving pressure difference of the tip leakage flow and increases the resistance along the way, effectively reducing the mixing effect between the leakage flow vortex and the main flow, and improving the flow condition in the tip area of the rotor. Also reduces aerodynamic noise.
  • the first-stage fan blade 202 includes a hub and a first blade 204, the hub is connected to the first motor 102, the first blade 204 is arranged on the peripheral side of the hub, and the first blade 204 is connected to the hub.
  • One end is the first blade root 210, and the other end of the first blade 204 opposite to the first blade root 210 is the first blade tip 208.
  • the second-stage fan blade 302 includes a hub and a second blade 304, the hub is connected to the first motor 102, the second blade 304 is provided on the peripheral side of the hub, and the second blade 304 is connected to the hub.
  • One end is the second blade root 310, and the other end of the second blade 304 opposite to the second blade root 310 is the second blade tip 308.
  • the length of the first blade 204 is L1;
  • the height h1 of the first tip winglet 206 is the length of the connecting end of the first tip winglet 206 and the first tip 208; h1 is less than or equal to 10% of L1; and/or along the vertical In the direction of the rotation axis of the second stage fan blade 302, the length of the second blade 304 is L2; in the direction perpendicular to the rotation axis of the second stage fan blade, the height h2 of the second tip winglet 306 is the second blade The length of the connecting end between the pointed winglet 306 and the second blade tip 308; h2 is less than or equal to 10% of L2.
  • the length of the blade refers to the distance from the tip of the blade to the root of the blade along the direction perpendicular to the axis of rotation of the blade.
  • cross-sections of the first-stage fan blade 202 and the second-stage fan blade 302 are taken along the direction perpendicular to the rotation axis of the fan blade to obtain the first blade 204 and the first blade as shown in FIG.
  • the height h1 of the first tip winglet 206 refers to the first tip winglet 206
  • the distance between the two ends of the connecting end connected to the first tip 208, and the height h2 of the second tip winglet 306 refers to the two ends of the connecting end connecting the second tip winglet 306 and the second tip 308 the distance between.
  • the shape of the tip winglet shown in FIGS. 6 and 7 is a schematic structural diagram, and the structure and shape of the tip winglet mentioned in this application are not limited to this.
  • the air-conditioning outdoor unit 1 further includes an air guide ring 400.
  • the first-stage fan blade 202 and the second-stage fan blade 302 are arranged in the air guide ring 400. Through the collection and diversion of the air guide ring 400, the airflow passes through the action of the two-stage fan blades and the wind pressure becomes larger, which improves Air supply efficiency.
  • first-stage fan blade 202 and the second-stage fan blade 302 are arranged in the air guide ring 400 means that along the direction perpendicular to the rotation axis of the first-stage fan blade 202, the first-stage fan blade 202 and the second-stage fan blade
  • the projection of the fan blade 302 on the rotation axis of the first-stage fan blade 202 is within the projection of the air guide ring 400 on the rotation axis of the first-stage fan blade 202.
  • the wind guide ring 400 includes: a wind ring main body 402 and a constriction 404.
  • the wind ring main body 402 is configured to have an air outlet end
  • the second-stage fan blades 302 are located in the wind ring main body 402
  • the first-stage fan blades 202 are partially located in the wind ring main body 402
  • the constriction 404 is opposite to the wind ring main body 402.
  • part of the first-stage fan blade 202 is located at the constriction 404; along the flow direction of the airflow, the cross-sectional area of the constriction 404 gradually decreases.
  • the air outlet end of the wind ring main body 402 is used for discharging air flow.
  • the second-stage fan blade 302 is completely covered by the wind ring main body 402, that is, along the direction perpendicular to the rotation axis of the second-stage fan blade 302, the projection of the second-stage fan blade 302 on its rotation axis is located in the wind ring main body 402.
  • the first-stage fan blade 202 In the projection on the axis of rotation of the first-stage fan blade 302; the first-stage fan blade 202 is not completely covered by the wind ring main body 402 due to the setting of the constriction 404, that is, the first-stage fan blade 202 is partly located in the wind ring main body 402, that is, along Perpendicular to the direction of the rotation axis of the first-stage fan blade 202, the projection part of the first-stage fan blade 202 on its rotation axis falls into the projection of the wind ring body 402 on the rotation axis of the first-stage fan blade 202.
  • the cross-sectional area of the constriction 404 gradually decreases so that the air inlet end of the constriction 404 expands outward, which facilitates the collection and introduction of the airflow.
  • the length of the wind ring body 402 corresponding to the first-stage fan 202 is L3 along the rotation axis direction of the first-stage fan 202, and the first-stage fan 202 has a length of L3.
  • the axial height of the blade 204 is H.
  • the axial height of the first blade 204 is the projection length of the tip of the first blade 204 on the rotation axis in a direction perpendicular to the rotation axis of the fan blade. Therefore, the value range of the ratio of L3 to H is further set to be 0.4 to 0.6.
  • the air guide ring 400 partially covers the first-stage fan blade 202, on the one hand, it can meet the air supply requirements, and on the other hand, it can make the first blade 204 have enough length to set the tip winglet to achieve improvement.
  • the first blade tip winglet 206 is located in the area where the first blade tip 208 is covered by the wind ring body 402, where the area where the first blade tip 208 is covered by the wind ring body 402 refers to an area perpendicular to the first stage In the direction of the rotation axis of the fan blade 202, the projection of the first blade tip 208 on the rotation axis of the first stage fan blade 202 is located in the area within the projection of the wind ring main body 402 on the rotation axis of the first stage fan blade 202.
  • the contour line of the end surface of the connecting end of the first tip winglet 206 and the first blade 204 is a straight section (sections WF2 to WF3 shown in the figure), and a straight section (shown in the figure WF2 To WF3 section) and the corresponding distance between the contour line of the free end of the first tip winglet 206 is equal.
  • the first-stage fan blade 202 is along the direction perpendicular to the rotation axis of the first-stage fan blade 202, and the projection point of one end of the straight section on the rotation axis of the first-stage fan blade 202 is close to the constriction 404 and the wind ring main body 402
  • the projection point of the connection point on the rotation axis of the first-stage fan blade 202 is set so that most or the whole of the tip winglet is covered by the wind guide ring 400.
  • the end connecting the first tip winglet 206 and the first blade 204 is the connecting end of the first tip winglet 206
  • the contour line of the end surface of the connecting end includes a straight section and a curved section, and the straight section It means that the direct distance between the contour line of the end surface of the connecting end and the contour line of the free end of the first tip winglet 206 is equal, and the curved section is located at the two ends of the straight section and is connected to the two ends of the straight section respectively.
  • the contour line of the end surface of the free end of the tip winglet is the extension curve of the tip of the tip winglet. Further, as shown in FIG.
  • the projection point of an end point WF2 of the straight section on the rotation axis of the first-stage fan blade 202 is F1;
  • the projection point of the connection point between 404 and the wind ring body 402 on the rotation axis of the first stage fan blade 202 is S;
  • the projection length of the tip of the first stage fan 202 on the rotation axis is L4.
  • the axial distance between the projection point F1 and the projection point S is less than or equal to 10% of the projection length L4, so that most or the whole of the tip winglet is covered by the air guide ring 400, and the tip The winglet has sufficient length so that it has the effect of improving uneven airflow and reducing noise.
  • the first-stage fan blade 202 is along a direction perpendicular to the rotation axis of the first-stage fan blade 202, and the other end point WF3 of the straight section is on the rotation axis of the first-stage fan blade 202.
  • the projection point is F2; the projection point of the tip of the first-stage fan blade 202 on the side of the second-stage fan blade 302 on the axis of rotation is B. Therefore, it is further set that the axial distance between projection point F2 and projection point B is less than or equal to 20% of the projection length L4, so that the length of the tip winglet does not exceed the length of the tip, and it is set according to the actual air flow.
  • the length of the tip winglet is determined within the range, so that the setting of the tip winglet has the effect of improving uneven airflow and reducing noise.
  • the thickness values of the first tip winglets 206 corresponding to the straight sections are equal, which facilitates processing and manufacturing.
  • the thickness value of the first tip winglet 206 corresponding to the straight section can be further set to be equal to the maximum thickness value among the thicknesses of the first blade 204. In this way, the main body of the tip winglet has a sufficient thickness to meet the strength requirements of the tip winglet.
  • the contour line of the end surface of the connecting end of the first tip winglet 206 and the first blade 204 further includes: a first curve segment (WF1 to WF2) and a second curve segment (WF3 to WF4);
  • the first curved section and the second curved section are respectively connected to the two ends of the straight section.
  • the distance between the first curve segment and the second curve segment and the end surface contour line of the free end of the corresponding first tip winglet 206 is from the end surface contour line corresponding to the straight section to the first tip winglet
  • the sides of 206 gradually decrease.
  • the positions of the two end points of the straight section of the first tip winglet 206 can also be adjusted, and the length of the first tip winglet 206 and the position at the tip of the first tip winglet 206 can be changed to meet the requirements in different situations.
  • the contour of the end surface of the connecting end of the second tip winglet 306 and the second blade 304 includes a third curve segment (WR2 to WR3), a first arc Segment (WR1 to WR2) and the second arc segment (WR3 to WR4), the first arc segment and the second arc segment are located at both ends of the third curve segment.
  • the connecting end of the second tip winglet 306 and the second blade 304 is smoothly transitioned, which has the effect of improving uneven airflow and reducing noise.
  • the third curve segment is the outward offset curve of the second blade 304, that is, the contour line between the free end of the second tip winglet 306 corresponding to the third curve segment and the third curve segment. The distance is equal.
  • the end connecting the second tip winglet 306 and the second blade 304 is the connecting end of the second tip winglet 306, and the contour line of the end surface of the connecting end includes a third curve segment and an arc segment.
  • the third curve segment means that the distance between the contour line of the end surface of the connecting end and the end surface contour line of the free end of the second tip winglet 306 is equal, and the arc segment is located at both ends of the third curve segment, and the third curve segment Connect the two ends separately.
  • the projection point of one end point WR2 of the third curve segment on the rotation axis of the second stage fan blade 302 is R1;
  • the projection point of the tip of the second-stage fan 302 on the rotation axis of the end point on the side of the first-stage fan blade 202 is C;
  • the projection length of the tip of the second-stage fan 302 on the rotation axis is L5.
  • the axial distance between the projection point R1 and the projection point C is less than or equal to 10% of the projection length L5 and greater than 5% of the projection length L5; the other end point WR3 of the third curve segment is in the second stage fan
  • the distance between the projection point R2 on the rotation axis of the blade 302 and the projection point D on the rotation axis of the other end of the tip of the second-stage fan blade 302 is less than or equal to 20% of the projection length L5, so that
  • the second tip winglet 306 is located at a proper position of the tip of the second stage fan blade 302 and has a sufficient length, so that the arrangement of the second tip winglet 306 also has the effects of improving uneven airflow and reducing noise.
  • the positions of the two end points of the third curve section of the second tip winglet 306 can also be adjusted, and the length of the second tip winglet 306 and the position at the tip of the second tip winglet 306 can be changed to meet the requirements in different situations. .
  • the first-stage fan blade 202 is set along the direction of the rotation axis of the first-stage fan blade 202, and the first-stage fan blade 202 is axially cross-sectioned with a circle centered on the rotation axis of the first-stage fan blade 202.
  • the cross-sectional shape of the first blade 204 is a blade shape; and/or along the rotation axis direction of the second-stage fan blade 302, the second-stage fan blade 302 is axised by a circle centered on the rotation axis of the second-stage fan blade 302.
  • the cross-sectional shape of the second blade 304 is a leaf shape.
  • the cross-sectional shape of the first blade and the cross-sectional shape of the second blade are set to a bionic leaf shape. Therefore, the length direction along the cross-sectional shape of the first blade 204 is further set, and the maximum thickness of the first blade 204 is located at 8% to 15% of the length of the cross-sectional shape of the first blade 204; and/or along the second blade 304 In the length direction of the cross-sectional shape of the second blade 304, the maximum thickness of the thickness of the second blade 304 is located at 8% to 15% of the length of the cross-sectional shape of the second blade 304. In this way, the position of the maximum thickness of the blade is made close to the side of the peripheral edge of the blade opposite to the direction of rotation.
  • the change of the blade tip and the thickness of the bionic leaf shape makes the blade streamlined, which is beneficial to reduce the resistance of airflow.
  • the value range of the maximum thickness value in the thickness of the first blade 204 is set to be 15% to 30% of the length of the cross-sectional shape of the first blade 204; and/or the value of the maximum thickness value in the thickness of the second blade 304 The range is 15% to 30% of the length of the cross-sectional shape of the second blade 304, which limits the value range of the maximum blade thickness, and correlates the blade thickness with the blade length, which makes the blade shape design reasonable.
  • the maximum thickness of the first blade 204 is close to the front edge of the first blade 204; the maximum thickness of the second blade 304 is close to the front edge of the second blade 304.
  • the leading edge of the blade refers to the inlet end of the blade in the direction in which the airflow enters. In this way, the airflow first contacts the maximum thickness of the blade, and the leading edge of the blade has sufficient strength to bear the impact of the airflow.
  • the cross-sectional shape of the first blade 204 and the cross-sectional shape of the second blade 304 are set to a bionic leaf shape, and the bionic leaf shape refers to an owl-like airfoil blade; further, as shown in FIG.
  • the cross-sectional shape of the first blade and the second blade shown according to the air flow direction of the fan, set the maximum thickness position in the cross-sectional shape of the bionic blade blade, specifically, the maximum thickness of the first blade 204 Is located at 8% to 15% of the length of the cross-sectional shape of the first blade 204; and/or the maximum thickness of the thickness of the second blade 304 is located at 8% to 15% of the length of the cross-sectional shape of the second blade 304, reducing Loss, and then achieve the best air supply effect.
  • first tip winglet 206 is located on the suction surface side of the first blade 204; the second tip winglet 306 is located on the suction surface side of the second blade 304.
  • both the suction surface side of the first blade 204 and the pressure surface side of the first blade 204 are provided with a first tip winglet 206, the suction surface side of the second blade 304 and the pressure surface side of the second blade 304
  • a second tip winglet 306 may also be provided on both sides.
  • the pressure surface side of the blade refers to the side of the blade facing the airflow entering direction
  • the suction side of the blade refers to the side of the blade facing away from the airflow entering direction.
  • the tip winglets can be separately arranged on the suction side, or can be arranged on the suction side and the pressure side at the same time. The specific setting method needs to be determined according to the airflow situation, so that the tip winglet has a high degree of flexibility to adapt to different application conditions.
  • the driving assembly includes: a first motor 102, a first motor support 104, a second motor 106, and a second motor support 108.
  • the first motor 102 is provided with a first output shaft; the first motor 102 is provided on the first motor support 104; the second motor 106 is provided with a second output shaft; the second motor 106 is provided on the second motor support 108.
  • the driving components are respectively composed of two different sets of motors with independent output shafts and fixed on independent motor supports.
  • the corresponding two output shafts are driven to have opposite rotation directions, and the first stage fan blade 202 and the second stage fan blade 302 connected to the two output shafts are further driven to form a counter-rotation, thereby making The wind pressure of the airflow entering the outdoor unit 1 of the air conditioner is increased, and the air supply capacity is improved.
  • the drive assembly includes: a motor and a motor support.
  • the motor is provided with a first output shaft and a second output shaft; the motor is provided on the motor support.
  • the drive assembly is composed of a motor and a corresponding motor support, wherein the motor is provided with a first output shaft and a second output shaft, and the direction of the first output shaft and the second output shaft rotate in opposite directions.
  • Two output shafts with different rotation directions are driven by the same motor, which further drives the first-stage fan blade 202 and the second-stage fan blade 302 connected to the two output shafts to form a counter-rotation, so that the airflow into the outdoor unit 1 of the air conditioner is pressured. Enlarged, the air supply capacity is improved, and the internal space of the outdoor unit 1 of the air conditioner is saved.
  • a fan using tip winglet technology includes: an electric control box 500, a wind guide ring 400, a first motor support 104, a second motor support 108, a first-stage fan blade 202, The second stage fan blade 302, the first tip winglet 206, and the second tip winglet 306.
  • the first tip winglet 206 and the second tip winglet 306 are respectively installed in the tip area of the first stage fan blade 202 and the second stage fan blade 302 of the fan, and the height of the tip winglet is less than or equal to the corresponding fan blade diameter Toward 5% of the maximum length.
  • the first-stage fan blade 202 and the second-stage fan blade 302 corresponding to the first-stage fan blade 202 and the second-stage fan blade 302 adopt a bionic blade shape to reduce the generation during the rotation of the two-stage fan blade. Noise.
  • the maximum thickness of the bionic leaf profile is located at 8% to 15% of the chord length of the blade tip, and the maximum thickness is 15% to 30% of the length of the tip section after the section.
  • the wind guide ring 400 includes a wind ring main body 402 and a constriction 404.
  • the projection point of the connection point between the constriction 404 and the wind ring main body 402 on the rotation axis of the first stage fan blade 202 is S, and the projection point S does not coincide with the tip front edge point A of the first stage fan blade 202.
  • the length of the wind ring body 402 corresponding to the first-stage fan blade 202 is L3, and the axial height of the first blade 204 of the first-stage fan blade 202 is H; L3 is equal to
  • the ratio of H (that is, the coverage rate of the air guide ring 400 corresponding to the first-stage fan blade 202) ranges from 0.4 to 0.6.
  • the blade suction surface profile is offset along the normal direction of the blade surface to generate a tip winglet.
  • the blade profile line refers to the axial section of the fan blade along the direction of the rotation axis of the fan blade, and the circle with the rotation axis center of the fan blade as the center.
  • the cross-sectional contour line of the blade is the blade profile line, which is located on the suction side. Is the suction contour line, and the suction contour line is connected by a three-segment curve.
  • the suction surface profile of the first blade 204 includes a straight section (WF2 to WF3), a first curved section (WF1 to WF2), and a second curved section (WF3 to WF4), of which the straight section (WF2 to WF3) is in the interval
  • the offset distance of the first tip winglet 206 relative to the straight section is a constant value, and the constant value is equal to the maximum thickness value of the airfoil of the first blade 204.
  • the point WF2 is close to the contraction end point S of the air guide ring 400, and the front and rear selectable range is ⁇ 10% of the axial chord length of the first blade 204 (the axial chord refers to the blade tip on the axis of rotation).
  • the distance from the point WF3 to the trailing edge point B of the first blade 204 is about 0 to 20% of the axial chord length.
  • the point WR2 is about 5% to 10% from the leading edge point C of the axial chord length of the second blade 304, and the point WR3 is about 0 to 20% from the trailing edge point D of the second blade 304.
  • the axial chord length is about 5% to 10% from the leading edge point C of the axial chord length of the second blade 304, and the point WR3 is about 0 to 20% from the trailing edge point D of the second blade 304.
  • Point WF1 to point WF2 (point WR1 to point WR2) and point WF3 to blade trailing edge point B (point WR3 to point blade trailing edge point D) are connected by a spline curve to ensure a smooth transition between the winglet and the suction surface of the blade.
  • the airflow uniformity is poor, and the radial flow is obvious.
  • winglets are added in the area not covered by the air guide ring 400, the presence of geometric protrusions will cause additional flow loss. Therefore, for the first
  • the first-level fan blade 202 and the winglet are mainly added in the area covered by the wind guide ring 400.
  • the coverage rate of the air guide ring 400 is 1, after applying the bionic blade profile, the vicinity of the front edge of the blade profile is thicker. Further thickening of the blade will increase the friction loss. Therefore, at the leading edge There is no need to thicken the leaf shape.
  • the targeted customized tip winglet can effectively suppress the tip leakage flow and weaken its mixing with the mainstream and other secondary flows, and then It can effectively improve the aerodynamic and acoustic performance of the counter-rotating fan.
  • the outdoor unit of the air conditioner as shown in FIG. 8 and FIG. 9, in any of the above embodiments, further includes: a housing 600, a heat exchanger 700 and an electric control box 500.
  • the heat exchanger 700 is located between the air inlet and the outlet of the housing 600, and the heat exchanger 700 is correspondingly provided on the three sides of the housing 600, so that the airflow can enter the air conditioner through the heat exchanger 700 from multiple directions.
  • the outdoor unit 1 improves the air supply efficiency.
  • the electric control box 500 is arranged on the housing 600.
  • the air conditioner outdoor unit 1 further includes a housing cover 900.
  • a mesh cover is installed on the housing cover 900, connected to the housing 600, and covered at the air outlet end of the air guide ring 400, and forms a complete air-conditioning outdoor unit 1 housing with the housing 600, so that the external environment is connected to the air-conditioning outdoor unit 1.
  • a certain degree of isolation is formed inside, which effectively protects the internal structure of the air conditioner outdoor unit 1, and at the same time avoids the danger of people or other animals touching the fan when the air conditioner outdoor unit 1 is working, and improves the safety of the air conditioner outdoor unit 1. Sex.
  • the second motor support is arranged in the housing cover 900, so that the second motor support 108 is protected by the housing cover 900 and does not affect the normal ventilation in the air guide ring 400, so that the air flow passes through the air guide ring 400 and the second motor support. After 108, it is discharged from the net cover without loss.
  • the mesh cover may adopt a square structure to fit the housing cover 900.
  • the air guide ring 400 is provided at the exit of the housing 600, the front, left, and right sides of the air conditioner outdoor unit 1 are all provided with a heat exchanger 700, and an electric control box 500 is provided On the back panel, the air intake on three sides is realized, and the air is discharged from the air guide ring 400, which improves the working efficiency of the outdoor unit 1 of the air conditioner.
  • the position of the electric control box 500 can be set at the lower part of the back plate, and a heat exchanger 700 can be added to the upper part of the back plate, so that the air-conditioning outdoor unit 1 can enter air from all sides.
  • the air conditioner outdoor unit 1 takes in from the side and discharges from the top.
  • the air outlet can also be arranged on the side of the housing 600 to achieve air intake from the top and other sides.
  • the specific structure can be set according to specific conditions. Fixed, not limited to this.
  • the electronic control box 500 is arranged outside the housing 600, or at least a part of it is arranged outside the housing 600.
  • Another aspect of the present application provides an air conditioner, including the air conditioner outdoor unit 1 in any of the above embodiments. Since the air conditioner in this embodiment includes the air conditioner outdoor unit 1 in any of the above embodiments, it has all the beneficial effects of the air conditioner outdoor unit 1 described above.
  • the air conditioner also includes an indoor unit, and the indoor unit cooperates with the outdoor unit to adjust the environmental conditions of the indoor environment.
  • the term “plurality” refers to two or more than two, unless otherwise clearly defined, the orientation or positional relationship indicated by the terms “upper” and “lower” are based on the orientation described in the drawings. The or positional relationship is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the application; “Connected”, “installed”, “fixed”, etc. should all be understood in a broad sense.
  • “connected” can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or through an intermediary. Indirectly connected.
  • the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

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Abstract

La présente invention concerne une unité extérieure (1) pour un conditionneur d'air, ladite unité extérieure comprenant : un ensemble d'entraînement, qui est pourvu d'un premier arbre de sortie et d'un second arbre de sortie ; des pales de ventilateur de premier étage (202), qui sont reliées au premier arbre de sortie ; des pales de ventilateur de second étage (302), qui sont reliées au second arbre de sortie, la direction de rotation des pales de ventilateur de premier étage (202) étant opposée à celle des pales de ventilateur de second étage (302) pendant le travail ; des premières ailettes (206), qui sont reliées à au moins une partie de premiers bouts de pale (208) de premières pales (204) ; et/ou des secondes ailettes (306), qui sont reliées à au moins une partie de seconds bouts de pale (308) de secondes pales (304). Selon l'unité extérieure (1) pour un conditionneur d'air, les pales de ventilateur à deux étages ayant des directions de rotation opposées sont respectivement entraînées au moyen de l'ensemble d'entraînement et des ailettes sont reliées sur une partie des bouts de pale des pales de ventilateur à deux étages, ce qui améliore l'état d'écoulement d'une région de bout de pale d'un rotor en utilisant les ailettes sur un ventilateur contrarotatif, ce qui réduit le bruit généré par la rotation du rotor et améliore les performances aérodynamiques et acoustiques du ventilateur.
PCT/CN2020/129501 2019-12-31 2020-11-17 Unité extérieure pour un conditionneur d'air WO2021135696A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911415338.2A CN113123979B (zh) 2019-12-31 2019-12-31 空调室外机
CN201911415338.2 2019-12-31

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WO2021135696A1 true WO2021135696A1 (fr) 2021-07-08

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PCT/CN2020/129501 WO2021135696A1 (fr) 2019-12-31 2020-11-17 Unité extérieure pour un conditionneur d'air

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