WO2020103602A1 - Ventilateur centrifuge, système de conduite d'air et climatiseur - Google Patents

Ventilateur centrifuge, système de conduite d'air et climatiseur

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Publication number
WO2020103602A1
WO2020103602A1 PCT/CN2019/110757 CN2019110757W WO2020103602A1 WO 2020103602 A1 WO2020103602 A1 WO 2020103602A1 CN 2019110757 W CN2019110757 W CN 2019110757W WO 2020103602 A1 WO2020103602 A1 WO 2020103602A1
Authority
WO
WIPO (PCT)
Prior art keywords
centrifugal fan
volute
air duct
air
bottom plate
Prior art date
Application number
PCT/CN2019/110757
Other languages
English (en)
Chinese (zh)
Inventor
刘雷明
邹云辉
程春雨
余明养
孙小洪
Original Assignee
珠海格力电器股份有限公司
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 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Priority to EP19887719.3A priority Critical patent/EP3855023B1/fr
Publication of WO2020103602A1 publication Critical patent/WO2020103602A1/fr

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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

  • This application relates to the technical field of air conditioning, and in particular to a centrifugal fan, air duct system and air conditioner.
  • centrifugal fan volute The role of the centrifugal fan volute is to concentrate and divert the gas from the impeller, and convert part of the kinetic energy of the gas into a static pressure.
  • the impeller rotates, the periodic collision between the air flow brought by the impeller and the volute and the air flow periodically passing through the minimum gap between the blade and the volute will produce a periodic rotation noise.
  • Traditional centrifugal fan volutes mostly adopt the form of a straight volute tongue with a constant radius of the volute tongue.
  • the volute of a centrifugal fan used in an air conditioner has such a structure: an impeller is provided in the volute, and the volute includes a front plate and side plates , The bottom plate and the volute tongue, the front plate is provided with an air inlet, the bottom plate is opposed to the front plate, the impeller axis is perpendicular to the plane of the bottom plate, the longitudinal symmetry plane of the volute tongue is parallel to the impeller axis, the longitudinal symmetry plane refers to the The tongue is divided into two symmetrical planes in the direction from the end of the air inlet to the end of the bottom plate.
  • the volute gap of this structure that is, the minimum gap between the outer circumference of the impeller, that is, the tip of the blade and the volute, does not change along the axis of the impeller in a section perpendicular to the axis of the impeller. Therefore, since the volute gap is equal in the entire axis direction, the noise of the same frequency is superimposed, resulting in periodic peak noise, resulting in relatively high rotational noise of the centrifugal fan of this structure.
  • the technical problem to be solved by the present application is to overcome the defects of the centrifugal fan in the prior art that the noise is large, thereby providing a centrifugal fan, an air duct system and an air conditioner with low noise.
  • a centrifugal fan provided by the present application includes a volute body, a centrifugal fan blade disposed in the volute body, the volute body includes a bottom plate, a front plate, and a bottom plate
  • the side plate between the front plate and the air inlet of the centrifugal fan blade is provided on the front plate, the side plate has a volute tongue, and the volute tongue faces the side from the side of the bottom plate
  • the side of the front plate is inclined so that the volute gap gradually decreases from the side of the bottom plate toward the side of the front plate, and the volute gap C at the front plate is smaller than the volute gap at the bottom plate D, and the difference between the volute gap D and the volute gap C is E.
  • E is 4% -6% of the diameter of the impeller of the centrifugal fan blade.
  • the arc surface of the volute tongue adopts a conical arc, and the radius of the arc corresponding to each volute gap of the volute tongue gradually decreases from the side of the bottom plate to the side of the front plate.
  • the radius of the volute is 15-20mm.
  • the side diffuser section surface of the centrifugal air duct of the centrifugal fan is inclined from the side of the bottom plate toward the side of the front plate, passes through the center of the centrifugal fan blade, and is located on the
  • the tangent line of the arc segment at the bottom plate is the first tangent line, passing through the center of the centrifugal fan blade, and the tangent line tangent to the arc segment of the volute located on the front plate is the second tangent line
  • the angle formed by the projection of the first tangent line and the second tangent line on a plane perpendicular to the axial direction of the centrifugal fan blade is an inclination angle ⁇ .
  • the volute opening of the air duct of the centrifugal fan is L5
  • the outlet distance of the expansion section of the centrifugal air duct is L6
  • the ratio of L6 and L5 is M, and 2 ⁇ M ⁇ 3.
  • This application also provides an air duct system, including:
  • the air duct body including the air outlet on the A side and the air outlet on the B side;
  • a centrifugal fan is provided on the air duct body and is located between the A-side air outlet and the B-side air outlet.
  • the centrifugal fan includes at least one first centrifugal fan, the first The centrifugal fan has two first air ducts, which are the first A-side air duct communicating with the A-side air outlet and the first B-side air duct communicating with the B-side air outlet.
  • the centrifugal fan adopts the above Of a centrifugal fan.
  • Two centrifugal fans are provided, including one first centrifugal fan and one second centrifugal fan.
  • the second centrifugal fan has a second air channel, and the second centrifugal fan is disposed near the A side.
  • the first centrifugal fan is disposed near the B side, and the second air passage communicates with the A side air outlet.
  • a guide cavity is provided on one side of the second centrifugal fan, and the guide cavity connects the first A-side air duct of the first centrifugal fan and the A-side air outlet.
  • the volute body of the first centrifugal fan is aligned with the volute body of the second centrifugal fan.
  • the present application also provides an air conditioner, including the above-mentioned air duct system.
  • a centrifugal fan provided by the present application because the volute gap gradually decreases from the side of the bottom plate to the side of the front plate, such that the air flow and the static
  • the interference between the main body of the volute produces different noise spectrum, which effectively reduces the aerodynamic noise of the centrifugal fan, avoids the howling noise caused by the resonance of the same frequency noise, improves the sound quality of the centrifugal fan, and effectively reduces The total noise of the centrifugal fan.
  • the side diffuser section surface of the centrifugal air duct of the centrifugal fan is inclined from one side of the bottom plate toward one side of the front plate, passing through the center of the centrifugal fan blade , And the tangent line that is tangent to the arc-shaped section of the volute located at the bottom plate is the first tangent line, passing through the center of the centrifugal fan blade, and the tang of the volute located on the front plate
  • the tangent line of the arc-shaped section is a second tangent line, and the angle formed by the projection of the first tangent line and the second tangent line on the plane perpendicular to the axial direction of the centrifugal fan blade is the inclination angle ⁇
  • the side diffuser section surface is inclined from the side of the bottom plate toward the side of the front plate, so that the arrangement can prevent the air flow from forming a vortex at this position and affecting the normal flow.
  • a centrifugal fan provided by the present application, the volute opening of the air duct of the centrifugal fan is L5, the exit distance of the expansion section of the centrifugal air duct is L6, the ratio of L6 and L5 is M, and 2 ⁇ M ⁇ 3, this setting can ensure that the air output of the centrifugal fan reaches the optimal value.
  • An air duct system comprising: an air duct body including an air outlet on the A side and an air outlet on the B side; a centrifugal fan provided with a plurality of air duct bodies and located on the A Between the side air outlet and the B-side air outlet, the centrifugal fan includes at least one first centrifugal fan, and the first centrifugal fan has two first air passages, which are respectively in communication with the A-side air outlet The first A-side air duct, and the first B-side air duct communicating with the B-side air outlet, the centrifugal fan adopts the above-mentioned centrifugal fan.
  • the first centrifugal fan Since the first centrifugal fan has two first air ducts, they are the first A-side air duct communicating with the A-side air outlet of the air duct body, and the first B-side air duct communicating with the B-side air outlet of the air duct body ,
  • the A-side air outlet will have a suction effect on the first A-side air duct
  • the B-side air outlet will have a suction effect on the first B-side air duct
  • the A-side air outlet has a larger air volume
  • the air output of the air outlet on the B side is large, the total air output of the air duct system is large, and because the centrifugal fan adopts one of the above centrifugal fans, the noise of the centrifugal fan is small, so the air duct system has increased the total The air output reduces the noise again.
  • An air duct system provided by the present application, two centrifugal fans are provided, including one first centrifugal fan and one second centrifugal fan, and the second centrifugal fan has one second air duct.
  • the second centrifugal fan is located near the A side
  • the first centrifugal fan is located near the B side
  • the second air duct communicates with the air outlet on the A side
  • the air output of the air outlet on the A side of the air duct system increases, thereby Increased the total air output of the air duct system.
  • a guide cavity is provided on one side of the second centrifugal fan, the guide cavity connects the first A-side air duct of the first centrifugal fan
  • the air outlet on the A side is connected.
  • the air outlet of the second centrifugal fan will affect the pressure distribution in the deflector cavity and form a negative pressure, which will form a suction effect on the air outlet of the first A side air duct of the first centrifugal fan. Therefore, the air output of the air outlet on the A side is increased.
  • An air duct system provided by the present application, wherein the volute body of the first centrifugal fan is aligned with the volute body of the second centrifugal fan.
  • the air duct system has a compact structure and a small footprint.
  • An air conditioner provided by the present application includes the above-mentioned air duct system, the air output of the air conditioner is large, and the noise is small.
  • Example 1 is a front view of an air duct system provided in Example 1 of this application;
  • FIG. 2 is a side view of the air duct system shown in FIG. 1;
  • FIG. 3 is a cross-sectional view of an air duct system shown in FIG. 1;
  • Example 4 is a schematic structural diagram of a centrifugal fan provided in Example 1 of this application;
  • Example 5 is a schematic structural diagram of a centrifugal fan provided in Example 1 of this application;
  • Example 6 is a front view of an air duct system provided in Example 2 of this application.
  • FIG. 7 is a cross-sectional view of the side view of FIG. 6;
  • Example 8 is a schematic structural view of the front view direction of the volute structure provided in Example 4.
  • FIG. 9 is a schematic structural view of the volute structure of FIG. 8 in a rear view direction;
  • Example 10 is a cross-sectional view of the centrifugal fan provided in Example 4.
  • Example 11 is an exploded view of the centrifugal fan provided in Example 4.
  • Example 12 is a cross-sectional view of a heat exchange fan assembly provided in Example 5;
  • Example 13 is a cross-sectional view of a heat exchange fan assembly provided in Example 5;
  • FIG. 14 is a side view of a heat exchange fan assembly provided in Example 5.
  • connection should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • installation should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • the volute body 113 includes a bottom plate 100, a front plate 308, and a side plate 101 disposed between the bottom plate 100 and the front plate 308, and the air inlet of the centrifugal fan blade 200
  • the side plate 101 has a volute tongue 309
  • the volute tongue 309 is inclined from the side of the bottom plate 100 toward the side of the front plate 308, so that the volute tongue gap
  • the side of the bottom plate 100 gradually decreases toward the side of the front plate 308, the volute gap C at the front plate 308 is smaller than the volute gap D at the bottom plate 100, and the volute gap D
  • the difference from the volute gap C is E, which is 4% -6% of the diameter of the impeller of the centrifugal fan blade 200.
  • the arc surface of the volute tongue 309 adopts a conical arc, and the radius of the arc corresponding to each volute gap of the volute tongue 309 is pressed from the side of the bottom plate 100 to the side of the front plate 308
  • the linear law gradually decreases, and the radius of the volute tongue 309 is 15-20 mm.
  • the side diffuser section surface 310 of the centrifugal air duct of the centrifugal fan is inclined from the side of the bottom plate 100 toward the side of the front plate 308, passes through the center of the centrifugal fan blade 200, and is in contact with the volute tongue
  • the tangent line of the arc section of 309 located at the bottom plate 100 is the first tangent line, passes through the center of the centrifugal fan blade 200, and is the arc shape of the volute 309 on the front plate 308
  • the tangent line of the tangent segment is the second tangent line, and the angle formed by the projection of the first tangent line and the second tangent line on the plane perpendicular to the axial direction of the centrifugal fan blade 200 is the inclination angle ⁇ , Among them, 7 ° ⁇ 12 °.
  • the side plate 101 in this embodiment includes a vertical first side plate 311 and a second side plate 312 inclined with respect to the first side plate 311, the volute of the air duct of the centrifugal fan has an opening degree of L5 ,
  • the volute opening degree is the minimum distance from the centrifugal wind wheel to the first side plate 311, the exit distance of the centrifugal air duct diffuser section is L6, and the centrifugal air duct diffuser section exit distance refers to the The minimum distance between the volute tongue 309 and the second side plate 312, the ratio of L6 to L5 is M, and 2 ⁇ M ⁇ 3.
  • volute gap gradually decreases from the side of the bottom plate 100 toward the side of the front plate 308, the air flow at the outlet of the centrifugal fan blade 200 and the stationary volute body 113 interfere differently due to different spatial distances , Generate different noise spectrum, which effectively reduces the aerodynamic noise of the centrifugal fan, avoids the howling noise caused by the same frequency noise due to resonance, improves the sound quality of the centrifugal fan, and effectively reduces the total noise value of the centrifugal fan.
  • This embodiment also provides an air duct system, including an air duct body and a plurality of centrifugal fans provided on the body, the centrifugal fan adopts the above-mentioned centrifugal fan.
  • the air duct body includes an A-side air outlet 302 and a B-side air outlet 303.
  • the A side is the upper side and the B side is the lower side.
  • the centrifugal fan includes a first centrifugal fan 300 and a second centrifugal fan 301.
  • the first centrifugal fan 300 has two first air ducts, which are respectively the first A-side air ducts communicating with the A-side air outlet 302 304, a first B-side air duct 305 communicating with the B-side air outlet 303;
  • the second centrifugal fan 301 has a second air duct 306, the second centrifugal fan 301 is disposed near the A side, and the first A centrifugal fan 300 is disposed near the B side, and the second air duct 306 communicates with the air outlet 302 on the A side;
  • a guide cavity 307 is provided on one side of the second centrifugal fan 301, and the guide cavity 307 will
  • the first A-side air duct 304 of the first centrifugal fan 300 communicates with the A-side 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.
  • the air outlet of the second centrifugal fan 301 at the A-side air outlet 302 will affect the pressure distribution in the deflector cavity 307, a negative pressure is formed, which will cause the air outlet of the first A-side air duct 304 of the first centrifugal fan 300
  • the suction effect can increase the air output of the A-side air outlet 302. It has been verified that under the same conditions, the first centrifugal fan 300 of this form has two air channels.
  • the first centrifugal fan 300 has only one air channel, the air volume can be increased by 150m 3 / h—200m 3 / h, and because the centrifugal fan uses the above-mentioned centrifugal fan, the noise of the centrifugal fan is small, so the air duct system not only increases the total air output, but also reduces the noise.
  • centrifugal fans there are more than two centrifugal fans on the air duct body, and one or more centrifugal fans are set as the first centrifugal fan 300 with two air ducts.
  • the difference between this embodiment and the above embodiment is that the A side is the lower side and the B side is the upper side.
  • the first centrifugal fan 300 on the upper side has two air passages, respectively The first A-side air duct 304 communicating with the A-side air outlet 302, the first B-side air duct 305 communicating with the B-side air outlet 303; the second centrifugal fan 301 located on the lower side has a second air duct 306
  • the second air channel 306 communicates with the air outlet 302 on the A side.
  • the first centrifugal fan 300 can emit air up and down at the same time, and the second centrifugal fan 301 can emit air downward, which improves the total air output, and at the same time avoids the phenomenon that the air flow interferes with each other when the upper and lower centrifugal fans are both on the upper and lower sides .
  • the lower outflow air volume accounts for a larger amount, which can improve the "carpet-type" heating effect, avoiding the concentration of hot air above the indoor level, increasing human comfort, giving users a better Comfortable experience;
  • this air duct system can be used for cooling conditions, and the proportion of the outflow air volume can greatly increase the indoor cold air The cooling effect is gradually increased from bottom to top.
  • This embodiment provides an air conditioner having the air duct system provided in Embodiment 1 or Embodiment 2.
  • the air output of the air conditioner is large, and the noise is small.
  • a volute structure provided in this embodiment includes a volute body 113.
  • the volute body 113 includes a bottom plate 100 and a side plate 101 disposed on the bottom plate 100.
  • a cavity 103 suitable for mounting the fixed end 102 of the motor 110 and a connecting portion suitable for connecting to the motor frame 104 are provided on the bottom plate 100 in an area enclosed by the side plate 101.
  • the volute structure of this embodiment directly integrates the motor mounting plate with the volute body 113, which not only saves the development cost of additional newly developed molds; it also saves the manual transfer of newly added parts and the process of screwing, Improve the assembly efficiency; and after the motor mounting plate is integrated with the volute body 113, there will be no abnormal noise caused by the friction between the motor mounting plate and the volute, which improves the experience and improves the comfort.
  • one end of the cavity 103 protrudes from the inner side wall of the bottom plate 100, and the bottom plate 100 is also provided with a The first reinforced structure where the protruding end is reinforced.
  • the first reinforcing structure includes a first arc-shaped stiffener 105 disposed around the cavity 103, and one end is connected to the side wall of the protruding end of the cavity 103, The first connection stiffener 106 connected to the first arc-shaped stiffener 105 at the other end.
  • a reinforcement structure can reliably reinforce the protruding ends of the cavity 103 in four directions of front, back, left, and right, and prevent the fixed end 102 from shaking in the cavity 103.
  • the connecting portion may have various structures.
  • the connecting portion preferably includes a plurality of connecting posts 107 that surround the cavity 103 and protrude from the inner side wall of the bottom plate 100.
  • the connecting post 107 is provided with a threaded hole, and the connecting post 107 is outside the first arc-shaped reinforcement 105.
  • the four legs of the electrical frame 104 are screwed to the four connecting posts 107 through screws, respectively.
  • the bottom plate 100 is also provided with a second reinforcement structure that reinforces the connection column 107.
  • the second reinforcement structure includes:
  • the second arc-shaped reinforcing rib 108 is arranged concentrically with the first arc-shaped reinforcing rib 105;
  • the second connection reinforcement 109 is provided on both sides of the connection column 107, and one end of the second connection reinforcement 109 on each side is connected to the first connection reinforcement 106, and the other end is connected to the first Two connection reinforcement 109 connection;
  • connection reinforcement rib is provided with a plurality of connection ribs connected between the connection post 107 and the first arc-shaped reinforcement 105, and between the connection post 107 and the second arc-shaped reinforcement rib 108, respectively Between the connecting post 107 and the second connecting reinforcement 109 on each side.
  • Such a reinforcement structure can reliably reinforce the connecting post 107 in four directions of front, back, left, and right, and prevent the connecting post 107 from shaking under external force.
  • a plurality of reinforcing blocks 111 surrounding the second arc-shaped reinforcing ribs 108 and spaced on the bottom plate 100 are also included.
  • the reinforcement block 111 can reinforce the bottom plate 100.
  • one side of the reinforcing block 111 is connected to the outer wall of the second arc-shaped reinforcing rib 108, so that the reinforcing block 111 can simultaneously reinforce the second arc-shaped reinforcing rib 108, thereby ensuring the stability of the connecting column reliability.
  • a centrifugal fan in this embodiment includes a centrifugal fan blade 200, a motor 110, and a motor frame 104, and further includes a volute structure as described above, and the fixed end 102 of the motor 110 Installed in the cavity 103, the output shaft of the motor 110 is connected to the centrifugal fan blade 200 through the motor frame 104, and the motor frame 104 is connected to the connecting portion to fix the motor 110 at The volute structure. Since the centrifugal fan of this embodiment has the above-mentioned volute structure, the generation of abnormal noise is avoided, and the user experience is good and the comfort is good.
  • An air conditioner of this embodiment has the centrifugal fan as described above. Not only does it avoid the occurrence of abnormal sounds, it has good comfort, but also has low development costs.
  • a specific embodiment of a heat exchange fan assembly includes a centrifugal fan and a heat exchanger 201.
  • the centrifugal fan includes a centrifugal fan blade 200, the diameter of the centrifugal fan blade 200 is L2; the heat exchanger 201 is provided on the air inlet side of the centrifugal fan, and the width of the heat exchanger 201 is L1,
  • L2 ⁇ L1 the diameter of the heat exchanger 201 and the centrifugal fan blade
  • the ratio of the diameter of 200 is F.
  • the heat exchanger 201 uses a bent heat exchanger, and the surface of the heat exchanger 201 near the centrifugal fan blade 200 is concave
  • the concave surface of the heat exchanger 201, the width L1 of the heat exchanger 201 refers to the distance between the two end points of the concave surface in the direction parallel to the end of the centrifugal fan blade 200, the lowest point of the concave surface and the centrifugal fan blade
  • the distance between the inlet side of 200 is L3, and L3 ⁇ L2, the ratio of L2 and L3 is G, in order to allow air to pass through the heat exchanger 201 smoothly, and to ensure the best surface wind speed of the heat exchanger 201, Satisfying 1.5 ⁇ G ⁇ 1.77, the concave surface is an arc surface.
  • the inlet angle of the centrifugal fan blade 200 is ⁇ , and 135 ° ⁇ ⁇ ⁇ 145 °, where ⁇ is the diameter of the end face of the centrifugal fan blade 200
  • ⁇ is the diameter of the end face of the centrifugal fan blade 200
  • L4 2 * [L3 * tan ( ⁇ / 2)]
  • the product of L4 and the width L1 of the heat exchanger 201 is the effective heat exchange area of the heat exchanger 201.
  • the air enters between the heat exchanger 201 and the centrifugal fan blade 200, is heat-extracted by the heat exchanger 201, is sucked in by the centrifugal fan, and is discharged from the upper end of the centrifugal fan. Since 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 L3 satisfies 1.5 ⁇ G ⁇ 1.77, the cooperation between the centrifugal fan and the heat exchanger 201 is optimized The wind field makes the heat exchange between the air and the heat exchanger 201 uniform, giving full play to the capacity of the heat exchanger 201.
  • the heat exchanger 201 does not use a bending heat exchanger, and the width of the heat exchanger 201 means that the two ends of the heat exchanger 201 near the centrifugal fan blade 200 are in contact with the centrifugal wind The distance of the ends of the leaf 200 in parallel directions.
  • This embodiment also provides an air conditioner including the heat exchange fan assembly described above. Because the heat exchange performance of the heat exchanger 201 is better, the performance of the air conditioner is better.

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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)

Abstract

La présente invention concerne un ventilateur centrifuge, un système de conduite d'air et un climatiseur. Le ventilateur centrifuge comprend un corps de volute (113) et des pales de ventilateur centrifuge (200) disposées à l'intérieur du corps de volute (113). Le corps de volute (113) comprend une plaque inférieure (100), une plaque avant (308), et une plaque latérale (101) entre la plaque inférieure (100) et la plaque avant (308). L'entrée d'air des pales de ventilateur centrifuge (200) est disposée sur la plaque avant (308). Un bec de volute (309) est disposé sur la plaque latérale (101). Le bec de volute (309) est incliné d'un côté de la plaque inférieure (100) vers un côté de la plaque avant (308), de telle sorte qu'un jeu de bec de volute est progressivement réduit d'un côté de la plaque inférieure (100) vers un côté de la plaque avant (308). En raison de différentes distances spatiales, l'interférence entre le flux d'air à la sortie des pales de ventilateur centrifuge (200) et le corps de volute fixe (113) est différente, ce qui permet d'obtenir différents spectres de bruit, ce qui réduit ainsi le bruit du ventilateur centrifuge, évite le sifflement provoqué par le bruit ayant la même fréquence en raison de la résonance, et améliore la qualité sonore du ventilateur centrifuge.
PCT/CN2019/110757 2018-11-20 2019-10-12 Ventilateur centrifuge, système de conduite d'air et climatiseur WO2020103602A1 (fr)

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CN201811389839.3 2018-11-20

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CN114198321A (zh) * 2021-12-03 2022-03-18 合肥联宝信息技术有限公司 一种具有自适应流道的离心扇
CN114636197A (zh) * 2022-03-31 2022-06-17 广东美的白色家电技术创新中心有限公司 贯流风机及空调器
CN115978769A (zh) * 2022-12-21 2023-04-18 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
CN115978642A (zh) * 2022-12-21 2023-04-18 珠海格力电器股份有限公司 一种空调

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CN114992715A (zh) * 2022-03-15 2022-09-02 珠海格力电器股份有限公司 风道结构及具有其的空调器

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CN114198321A (zh) * 2021-12-03 2022-03-18 合肥联宝信息技术有限公司 一种具有自适应流道的离心扇
CN114198321B (zh) * 2021-12-03 2023-10-27 合肥联宝信息技术有限公司 一种具有自适应流道的离心扇
CN114636197A (zh) * 2022-03-31 2022-06-17 广东美的白色家电技术创新中心有限公司 贯流风机及空调器
CN114636197B (zh) * 2022-03-31 2023-09-08 广东美的白色家电技术创新中心有限公司 贯流风机及空调器
CN115978769A (zh) * 2022-12-21 2023-04-18 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
CN115978642A (zh) * 2022-12-21 2023-04-18 珠海格力电器股份有限公司 一种空调
CN115978642B (zh) * 2022-12-21 2024-06-04 珠海格力电器股份有限公司 一种空调

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