CN108561335B - Axial flow wind wheel and household appliance - Google Patents

Axial flow wind wheel and household appliance Download PDF

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Publication number
CN108561335B
CN108561335B CN201810493243.1A CN201810493243A CN108561335B CN 108561335 B CN108561335 B CN 108561335B CN 201810493243 A CN201810493243 A CN 201810493243A CN 108561335 B CN108561335 B CN 108561335B
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China
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tail
longitudinal direction
front part
axial flow
intersection point
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CN108561335A (en
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陈学彬
程超
魏留柱
陈国坚
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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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
    • 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
    • F04D29/384—Blades characterised by form
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Wind Motors (AREA)

Abstract

The invention discloses an axial flow wind wheel and a household appliance, wherein the axial flow wind wheel comprises a wheel hub and four blades, the four blades are uniformly distributed on the outer surface of the wheel hub by taking the axis of the wheel hub as a rotation center, the blades comprise a bottom layer, a front edge, a top layer and a tail edge which are sequentially connected end to end, the front edge is close to the air inlet direction of the axial flow wind wheel, the bottom layer is arranged on the outer surface of the wheel hub, the projection value of any point on the blades on the axis of the wheel hub is x, the vertical distance between any point on the blades and the axis of the wheel hub is r, and corresponding curves of the front edge and the tail edge in an x-r coordinate system are l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail respectively. Compared with the existing wind wheel, the axial flow wind wheel of the technical scheme has the advantages of high wind quantity, low power and low noise, and experiments prove that the wind quantity is improved by 2.5% under the same rotating speed, the power is reduced by 7.2% under the same wind quantity, and the noise is reduced by 1.5dB (A) under the same wind quantity.

Description

Axial flow wind wheel and household appliance
Technical Field
The invention relates to the technical field of air conditioning, in particular to an axial flow wind wheel and a household appliance.
Background
Household appliances such as dehumidifiers, air conditioners, purifiers, etc., often require fans to be installed to direct the air. At present, a fan installed on a household appliance is mainly a centrifugal wind wheel, compared with the centrifugal wind wheel, the axial flow wind wheel has the characteristics of large air quantity and low power, and the noise problem caused by vibration caused by centrifugation can be avoided by using the axial flow wind wheel. However, under the same rotating speed of the existing axial flow wind wheel, the air quantity is not high enough, and the air quantity noise and the power are high, so that the energy consumption ratio of the household appliance is low, the comfort of the household appliance product is reduced, and the household appliance product does not have a competitive advantage.
Therefore, it is necessary to provide a new axial flow wind wheel to solve the above technical problems.
Disclosure of Invention
The invention mainly aims to provide an axial flow wind wheel and a household appliance, and aims to solve the problem that the comfort of a household appliance product is low due to low air quantity of the household appliance and high air quantity noise and power.
In order to achieve the above purpose, the axial flow wind wheel provided by the invention comprises a hub and four blades, wherein the four blades are uniformly distributed on the outer surface of the hub by taking the axis of the hub as a rotation center, the blades comprise a bottom layer, a front edge, a top layer and a tail edge which are sequentially connected end to end, the front edge is close to the air inlet direction of the axial flow wind wheel, the bottom layer is arranged on the outer surface of the hub, the projection value of any point on the blades on the axis of the hub is x, the vertical distance of any point on the blades from the axis of the hub is r, the corresponding curves of the front edge and the tail edge in an x-r coordinate system are l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail respectively,
L Tail of tail (x Tail of tail ,r Tail of tail ) satisfies the following formula:
x Tail of tail ＝0.000045(1±10％)r Tail of tail 3-0.013878(1±10％)r Tail of tail 2+1.091(1±10％)r Tail of tail -19.98+k1;
l Front part (x Front part ,r Front part ) satisfies the following formula:
x Front part ＝0.00011(1±10％)r Front part 3-0.02336(1±10％)r Front part 2+1.80683(1±10％)r Front part +1.44087+k2;
Where k 1 and k 2 are arbitrary real numbers.
Preferably, the projection points of any point on the bottom layer and the top layer in the x-r coordinate system are (x 1,r1) and (x 4,r4), respectively;
The intersection points of the bottom layer, the front edge and the tail edge on the airfoil middle line of the bottom layer are respectively a first front intersection point and a first tail intersection point, the projection points of the first front intersection point and the first tail intersection point in the x-r coordinate system are respectively corresponding to D 1(xD1,rD1) and D 2(xD2,rD2), and an included angle between the axis and any point on the airfoil middle line of the bottom layer and the connecting line of the first front intersection point is an installation angle alpha 1;
The intersection points of the top layer, the front edge and the tail edge on the wing profile middle line of the top layer are a fourth front intersection point and a fourth tail intersection point respectively, the projection points of the fourth front intersection point and the fourth tail intersection point in the x-r coordinate system are A 1(xA1,rA1) and A 2(xA2,rA2 respectively), and an included angle between a connecting line of any point on the wing profile middle line of the top layer and the fourth front intersection point and the axis is a mounting angle alpha 4;
Note (x1-xD2)/(xD1-xD2)＝δD,(x1-xA2)/(xA1-xA2)＝δA,α1 and a 4 each satisfy the following formulas:
α1＝-59.751δD 3+133.42δD 2-52.694δD+52.882±5；
α4＝-54.766δA 3+97.065δA 2-29.831δA+59.387±5。
Preferably, the blade is divided into a plurality of longitudinally extending layers between the leading edge and the trailing edge, and a plurality of transversely extending wing-shaped layers between the bottom layer and the top layer, the longitudinally extending layers and the transversely extending wing-shaped layers are mutually staggered, the corresponding projection curve of any longitudinally extending layer in the x-r coordinate system is l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) (n epsilon [1, N ]), and the l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) is the l Front part (x Front part ,r Front part ) and the l Tail of tail (x Tail of tail ,r Tail of tail ) which are calculated through linear interpolation operation; the projection curve of any transverse airfoil layer corresponding to the x-r coordinate system is L Transverse bar λ(x Transverse bar λ,r Transverse bar λ) (lambda epsilon (0, 1)), the curve length of L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) cut by the projection curve corresponding to the bottom layer and the projection curve corresponding to the top layer is L Longitudinal direction n, the curve length of any point (x Longitudinal direction n,r Longitudinal direction n) on L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) cut by the projection curve corresponding to the bottom layer on L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) is L Longitudinal direction n', L Longitudinal direction n′/L Longitudinal direction n =lambda is marked, and L Transverse bar λ(x Transverse bar λ,r Transverse bar λ) is a curve formed by connecting a plurality of points with identical lambda values on L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n).
Preferably, when λ=0.5, curve l Transverse bar 0.5(x Transverse bar 0.5,r Transverse bar 0.5) corresponds to a second transverse airfoil layer of the blade, the intersection points of the airfoil centerline of the second transverse airfoil layer with the leading edge and the trailing edge are a second leading intersection point and a second trailing intersection point, respectively, the projection points of the second leading intersection point and the second trailing intersection point in the x-r coordinate system are C 1(xC1,rC1) and C 2(xC2,rC2), and the included angle between the axis and the line of any point x 2 and C 1(xC1,rC1) on the second transverse airfoil layer is a mounting angle α 2, denoted (x 1-xC2)/(xC1-xC2)＝δC, wherein:
α2＝-172.04δC 3+281.7δC 2-90.718δC+54.985±5。
preferably, when λ=0.945, curve l Transverse bar 0.945(x Transverse bar 0.945,r Transverse bar 0.945) corresponds to a third transverse airfoil layer of the blade, the intersection points of the airfoil centerline of the third transverse airfoil layer with the leading edge and the trailing edge are a third leading intersection point and a third trailing intersection point, respectively, the projection points of the third leading intersection point and the third trailing intersection point in the x-r coordinate system correspond to B 1(xB1,rB1) and B 2(xB2,rB2), and the included angle between the axis and the line of any point x 3 and B 1(xB1,rB1) on the third airfoil layer is a mounting angle α 3, denoted (x 1-xB2)/(xB1-xB2)＝δB, wherein:
α3＝-63.367δB 3+104.37δB 2-24.213δB+55.689±5。
preferably, the maximum thickness t max and the minimum thickness t min of each transverse airfoil layer blade region satisfy t max/tmin.ltoreq.3.
Preferably, the thickness of the top layer: thickness of the bottom layer= (1.1-2.5): (4-8).
Preferably, the k 1＝k2.
In addition, the invention also provides a household appliance which comprises the axial flow wind wheel.
Preferably, the household appliance is a dehumidifier, the dehumidifier further comprises a shell, a heat exchanger, a middle partition plate and a compressor, wherein the heat exchanger, the middle partition plate and the compressor are arranged in the shell, the middle partition plate is arranged between the heat exchanger and the compressor, the shell comprises an air inlet and an air outlet, the heat exchanger is close to the air inlet, the axial flow wind wheel is close to the air outlet, and the axial flow wind wheel drives air to be blown out from the air outlet after passing through the heat exchanger.
According to the technical scheme, the axial flow wind wheel comprises a hub and four blades, the four blades are uniformly arranged on the periphery of the hub by taking the axis of the hub as a rotation center, the blades comprise a bottom layer, a front edge, a top layer and a tail edge which are sequentially connected end to end, the front edge is close to the air inlet direction of the axial flow wind wheel, the bottom layer is arranged on the outer surface of the hub, projections of the front edge and the tail edge in an x-r coordinate system meet l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ), and experiments prove that compared with the existing wind wheel, the axial flow wind wheel has the advantages of high wind quantity, low power and low noise, the same-speed wind quantity is improved by 2.5%, the same-wind quantity power is reduced by 7.2%, and the same-wind quantity noise is reduced by 1.5dB (A).
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a axial flow wind wheel in an embodiment of the present invention;
FIG. 2 is a schematic diagram of coordinate definition of a wind wheel for axial flow in an embodiment of the present invention;
FIG. 3 is a perspective view of an axial flow wind wheel in an x-r coordinate system in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of a horizontal airfoil layer layering of a axial flow wind wheel in an embodiment of the present invention;
FIG. 5 is a schematic view of the definition of the mounting angle of a axial flow wind wheel according to an embodiment of the present invention;
FIG. 6 is a graph showing the comparison of the air volume of an axial flow wind wheel and an existing axial flow fan at the same rotation speed in the embodiment of the invention;
FIG. 7 is a graph showing the noise of the axial flow wind wheel and the existing axial flow fan under the same air volume in the embodiment of the invention;
Fig. 8 is a graph comparing the power of the axial flow wind wheel with that of the existing axial flow fan under the same air quantity in the embodiment of the invention.
Reference numerals illustrate:
Reference numerals Name of the name Reference numerals Name of the name
1 Axial flow wind wheel 123 Top layer
11 Hub 124 Trailing edge
12 Blade 125 A second transverse airfoil layer
121 Bottom layer 126 Third transverse airfoil layer
122 Leading edge 127 Airfoil centerline
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention. It should be noted that the strong and weak hooks mentioned in the following embodiments are not set for the type of wire to which the hooks can be attached, but are merely for convenience of description.
The invention provides an axial flow wind wheel and a household appliance, and aims to solve the problem that the comfort of a household appliance product is low due to low air quantity, high air quantity noise and high power of the household appliance.
Referring to fig. 1 to 4, in an embodiment of the present invention, an axial flow fan includes a hub 11 and four blades 12, the four blades 12 are uniformly distributed on an outer surface of the hub 11 with an axis of the hub 11 as a rotation center, the blades 12 include a bottom layer 121, a front edge 122, a top layer 123 and a tail edge 124 connected end to end in sequence, the front edge 122 is close to an air inlet direction of the axial flow wind wheel 1, the bottom layer 121 is disposed on the outer surface of the hub 11, a projection value of any point on the blades 12 on the axis of the hub 11 is x, a vertical distance of any point of the blades 12 from the axis of the hub 11 is r, curves corresponding to the front edge 122 and the tail edge 124 in an x-r coordinate system are l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail respectively),
L Tail of tail (x Tail of tail ,r Tail of tail ) satisfies the following formula:
x Tail of tail ＝0.000045(1±10％)r Tail of tail 3-0.013878(1±10％)r Tail of tail 2+1.091(1±10％)r Tail of tail -19.98+k1;
l Front part (x Front part ,r Front part ) satisfies the following formula:
x Front part ＝0.00011(1±10％)r Front part 3-0.02336(1±10％)r Front part 2+1.80683(1±10％)r Front part +1.44087+k2;
Where k 1 and k 2 are arbitrary real numbers.
It should be noted that, in the two curves l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ), any real number k 1 represents that the curve l Tail of tail (x Tail of tail ,r Tail of tail ) moves in parallel along the x-axis in the x-r coordinate system, any real number k 2 represents that the curve l Front part (x Front part ,r Front part ) moves in parallel along the x-axis in the x-r coordinate system, specifically, it can be understood that k 1 and k 2 are the offsets of the origin of coordinates of the axial wind wheel 1 in the x-r coordinate system in the x-direction, that is, whichever point on the axis of the hub 11 is selected as the origin of coordinates, the shapes of the curves represented by l Tail of tail (x Tail of tail ,r Tail of tail ) and l Front part (x Front part ,r Front part ) can be obtained by the trailing edge 124 and the leading edge 122 in the x-r coordinate system. In addition, blade 12 has a thickness, and preferably l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ) refer to the projection of the midline in the thickness of leading edge 122 and trailing edge 124 in the x-r coordinate system. In addition, in order to prevent deformation of the structure of the blade 12, the spacing between l Tail of tail (x Tail of tail ,r Tail of tail ) and l Front part (x Front part ,r Front part ) is ensured to be constant, preferably k 1＝k2.
In addition, any point on the blade 12 is located on a circle perpendicular to the axis, and in the plane pointed by the circle, the distance from the any point to the center of the circle is the perpendicular distance r between the any point and the axis of the hub 11. In the two curve formulas of l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ), the (1±10%) indicates that the allowed floating range of each coefficient is [0.9,1.1] times, and in the case of l Front part (x Front part ,r Front part ), the allowed floating range of the cubic coefficient 0.00011 is [0.00011× 0.9,0.00011 ×1.1].
In the technical scheme of this embodiment, axial-flow wind wheel 1 includes wheel hub 11 and four blades 12, and four blades 12 regard the axis of wheel hub 11 as the center of rotation evenly to set up on wheel hub 11's periphery, and blade 12 includes bottom 121, leading edge 122, top layer 123 and trailing edge 124 that head and the tail connect in proper order, leading edge 122 is close to axial-flow wind wheel 1's air inlet direction, bottom 121 set up in on wheel hub 11's the surface, the projection of leading edge 122 and trailing edge 124 in x-r coordinate system satisfies l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ) two formulas, and experiments prove that axial-flow wind wheel 1 of this technical scheme compares current wind wheel, has the wind quantity height, power and low noise's advantage. Referring to fig. 6 to 8, it can be known that, compared with the existing axial flow wind wheel 1, the axial flow wind wheel 1 of the embodiment has the advantages that the same rotational speed and the air quantity are improved by 2.5%, the same air quantity and the power are reduced by 7.2%, and the same air quantity and the noise are reduced by 1.5dB (a), and by using the axial flow wind wheel 1 of the technical scheme, the use comfort of the household appliance can be improved, so that the household appliance product has strong market competitiveness, and the leading advantage of the product is ensured.
Further, the projected points of any point on the bottom layer 121 and the top layer 123 in the x-r coordinate system are (x 1,r1) and (x 4,r4), respectively; the intersection points of the bottom layer 121, the leading edge 122 and the trailing edge 124 on the airfoil centerline 127 of the bottom layer 121 are respectively a first front intersection point and a first tail intersection point, the projection points of the first front intersection point and the first tail intersection point in an x-r coordinate system are respectively corresponding to D 1(xD1,rD1) and D 2(xD2,rD2), and an included angle between a connecting line of any point on the airfoil centerline 127 of the bottom layer 121 and the first front intersection point and the axis is a mounting angle alpha 1 (see fig. 5); the intersection points of the top layer 123 with the leading edge 122 and the trailing edge 124 on the airfoil centerline 127 of the top layer 123 are a fourth front intersection point and a fourth tail intersection point respectively, and the projection points of the fourth front intersection point and the fourth tail intersection point in an x-r coordinate system are a 1(xA1,rA1) and a 2(xA2,rA2 respectively), and an included angle between a connecting line of any point on the airfoil centerline 127 of the top layer 123 and the fourth front intersection point and an axis is a mounting angle alpha 4;
note (x1-xD2)/(xD1-xD2)＝δD,(x1-xA2)/(xA1-xA2)＝δA,α1 and a 4 each satisfy the following formulas:
α1＝-59.751δD 3+133.42δD 2-52.694δD+52.882±5；
α4＝-54.766δA 3+97.065δA 2-29.831δA+59.387±5。
The airfoil shape corresponds to the thickness of the blade 12, and the airfoil centerline 127 is a centerline of the shape formed in the thickness direction of the bottom layer 121 and the top layer 123. In the formulas corresponding to α 1 and α 4, ±5 denotes that α 1 and α 4 each have a floating range of +5° and-5 °, i.e., [ -5, +5 ]. In addition, the hub 11 is a cylinder, the bottom layer 121 is disposed on the outer surface of the hub 11, and the curve corresponding to the bottom layer 121 in the x-r coordinate system is a straight line parallel to the x-axis. In addition, k 1＝k2 is preferable in order to prevent deformation of the structure of the blade 12.
Further, referring to FIG. 4, the blade 12 is divided into a plurality of longitudinally extending layers (not shown) located between the leading edge 122 and the trailing edge 124, and a plurality of laterally extending airfoil layers located between the bottom layer 121 and the top layer 123, wherein the longitudinally extending layers and the laterally extending airfoil layers are mutually staggered, and a projection curve of any longitudinally extending layer in an x-r coordinate system is l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n)(n∈[1,N]),l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) which is l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ), which are calculated through interpolation operation; the corresponding projection curve of any transverse airfoil layer in the x-r coordinate system is L Transverse bar λ(x Transverse bar λ,r Transverse bar λ)(λ∈(0,1)),l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n), the curve length of any point (x Longitudinal direction n,r Longitudinal direction n) on the projection curve of the bottom layer 121 and the projection curve of the top layer 123 which are cut off is L Longitudinal direction n,l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n), the curve length of any point (x Longitudinal direction n,r Longitudinal direction n) on the projection curve of the bottom layer 121 and the projection curve of the bottom layer 121 which are cut off on L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) is L Longitudinal direction n', and the mark L Longitudinal direction n′/L Longitudinal direction n＝λ,l Transverse bar λ(x Transverse bar λ,r Transverse bar λ) is a curve formed by connecting a plurality of points with the same lambda value on L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n). The curve length taken by the projection curve of the bottom layer 121 and the projection curve of the top layer 123 refers to the curve length between the projection curve of the bottom layer 121 and the projection curve of the top layer 123.
In this embodiment, l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) is l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ) are calculated by linear interpolation operation. Specifically, l Front part (x Front part ,r Front part ) takes a point (x Longitudinal direction n,r Longitudinal direction n) on a point (x Tail of tail n,r Tail of tail n),l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) on a point (x Front part n,r Front part n),l Tail of tail (x Tail of tail ,r Tail of tail ), wherein r Front part n＝r Tail of tail n＝r Longitudinal direction n is x Longitudinal direction n＝x Front part n+((x Longitudinal direction n-x Front part n)/(x Tail of tail n-x Front part n))×(x Tail of tail n-x Front part n), note that (x Longitudinal direction n-x Front part n)/(x Tail of tail n-x Front part n) =γ, N different r values correspond to N points (x Longitudinal direction n,r Longitudinal direction n), N (x Longitudinal direction n,r Longitudinal direction n) are connected to form l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n), and any point on l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) satisfies (x Longitudinal direction n-x Front part n)/(x Tail of tail n-x Front part n) =γ, γ∈ (0, 1). For example, each point on the longitudinally extending layer located directly intermediate the leading edge 122 and the trailing edge 124 satisfies γ=0.5.
In other embodiments, the curve l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) may also be obtained by directly calculating ,l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n)＝γ×l Front part (x Front part ,r Front part )+(1-γ)×l Tail of tail (x Tail of tail ,r Tail of tail ), by the following formula or l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) is l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ) by a nonlinear interpolation operation, such as a lagrangian interpolation method, a newton interpolation method, and the like. It should be noted that, the above l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) is l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ) is calculated by nonlinear interpolation operation, and refers to that the corresponding endpoint values on l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ) obtain intermediate point values through interpolation algorithm, and several intermediate point values are fitted to form a curve l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n).
Further, when λ=0.5, curve l Transverse bar 0.5(x Transverse bar 0.5,r Transverse bar 0.5) corresponds to the second transverse airfoil layer 125 of the blade 12, the intersection points of the airfoil centerline 127 of the second transverse airfoil layer 125 with the leading edge 122 and the trailing edge 124 are the second leading intersection point and the second trailing intersection point, respectively, and the projection points of the second leading intersection point and the second trailing intersection point in the x-r coordinate system correspond to C 1(xC1,rC1) and C 2(xC2,rC2), the included angle between the axis and the connecting line of any point x 2 and C 1(xC1,rC1) on the second transverse airfoil layer 125 is the mounting angle α 2, and the included angle is denoted as x 1-xC2)/(xC1-xC2)＝δC (wherein:
α2＝-172.04δC 3+281.7δC 2-90.718δC+54.985±5。
Further, when λ=0.945, curve l Transverse bar 0.945(x Transverse bar 0.945,r Transverse bar 0.945) corresponds to the third transverse airfoil layer 126 of the blade 12, the intersection points of the airfoil centerline 127 of the third transverse airfoil layer 126 with the leading edge 122 and the trailing edge 124 are a third leading intersection point and a third trailing intersection point, respectively, the projection points of the third leading intersection point and the third trailing intersection point in the x-r coordinate system are B 1(xB1,rB1) and B 2(xB2,rB2), and the included angle between the axis and any point x 3 on the third airfoil layer and the B 1(xB1,rB1) is a mounting angle α 3, denoted as (x 1-xB2)/(xB1-xB2)＝δB, wherein:
α3＝-63.367δB 3+104.37δB 2-24.213δB+55.689±5。
It should be noted that the bottom layer 121 corresponds to a first transverse airfoil layer, and the top layer 123 corresponds to a fourth transverse airfoil layer. In the formulas corresponding to α 2 and α 3, ±5 denotes that α 2 and α 3 each have a floating range of +5° and-5 °, i.e., [ -5, +5 ].
Further, the maximum thickness t max and the minimum thickness t min of each lateral airfoil layer blade region satisfy t max/tmin be less than or equal to 3, that is, the maximum thickness t max and the minimum thickness t min of the bottom layer 121, the second lateral airfoil layer 125, the third lateral airfoil layer 126, and the top layer 123 in the layer thickness direction satisfy t max/tmin be less than or equal to 3. In addition, the maximum thickness is near the direction of the leading edge 122, and the minimum thickness is near the direction of the trailing edge 124. Typically, the suction side to pressure side pressure difference at the leading edge 122 is greater than the suction side to pressure side pressure difference at the trailing edge 124, and the thickness near the leading edge 122 is greater than the thickness near the trailing edge 124, which is beneficial for preventing blade deformation.
Preferably, the thickness of the top layer 123: thickness of the bottom layer 121= (1.1-2.5): (4-8), for example, the top layer 123 has a thickness of 1.5mm and the bottom layer 121 has a thickness of 5.5mm. The thickness of the top layer 123 is small, so that wind resistance can be reduced, and the thickness of the bottom layer 121 is large, so that the connection strength of the blades 12 and the hub 11 can be enhanced, and the blades 12 are prevented from being bent in the working process of the axial flow wind wheel 1.
Preferably, the maximum perpendicular distance of the blades 12 from the axis of the hub 11: minimum vertical distance= (42-52): (125-153), for example, the top layer 123 is located a maximum vertical distance 139mm from the axis of the hub 11 and the bottom layer 121 is located a minimum vertical distance 47mm from the axis of the hub 11.
Preferably, the projected length of the bottom layer 121 on the axis: projection length of top layer 123 on axis= (36-45): (83.7-102), for example, the top layer 123 has a projected length of 93mm on the axis and the bottom layer 121 has a projected length of 40.5mm on the axis.
In addition, an embodiment of the present invention also provides a household appliance (not shown) comprising the axial flow wind turbine 1 as described above. Preferably, the household appliance is a dehumidifier, the dehumidifier further comprises a shell, a heat exchanger, a middle partition plate and a compressor, wherein the heat exchanger, the middle partition plate and the compressor are arranged in the shell, the middle partition plate is arranged between the heat exchanger and the compressor, the shell comprises an air inlet and an air outlet, the heat exchanger is arranged close to the air inlet, the axial flow wind wheel 1 is arranged close to the air outlet, and the axial flow wind wheel 1 drives air to be blown out from the air outlet after passing through the heat exchanger. In other embodiments, the household appliance may also be a purifier, an air conditioner, a refrigerator, or the like. Since the household appliance comprises the axial flow wind wheel 1 as described above, the household appliance has all the beneficial effects of the axial flow wind wheel 1, and will not be described in detail herein.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (10)

1. The axial flow wind wheel is characterized by comprising a hub and four blades, wherein the four blades are uniformly distributed on the outer surface of the hub by taking the axis of the hub as a rotation center, the blades comprise a bottom layer, a front edge, a top layer and a tail edge which are sequentially connected end to end, the front edge is close to the air inlet direction of the axial flow wind wheel, the bottom layer is arranged on the outer surface of the hub, the projection value of any point on the blades on the axis of the hub is x, the vertical distance between any point on the blades and the axis of the hub is r, the corresponding curves of the front edge and the tail edge in an x-r coordinate system are l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ), and the l Front part (x Front part ,r Front part ) and l Tail of tail (x Tail of tail ,r Tail of tail ) are the projections of thickness center lines of the front edge and the tail edge in an x-r coordinate system respectively;
l Tail of tail (x Tail of tail ,r Tail of tail ) satisfies the following formula:
x Tail of tail ＝0.000045(1±10％)r Tail of tail 3-0.013878(1±10％)r Tail of tail 2+1.091(1±10％)r Tail of tail
-19.98+k1；
l Front part (x Front part ,r Front part ) satisfies the following formula:
x Front part ＝(0.000111±10％)r Front part 3-0.02336(1±10％)r Front part 2+1.80683(1±10％)r Front part
+1.44087+k 2; where k 1 and k 2 are arbitrary real numbers.
2. The axial flow wind wheel of claim 1, wherein the projection points of any point on the bottom layer and the top layer in the x-r coordinate system are (x 1,r1) and (x 4,r4), respectively;
The intersection points of the bottom layer, the front edge and the tail edge on the airfoil middle line of the bottom layer are respectively a first front intersection point and a first tail intersection point, the projection points of the first front intersection point and the first tail intersection point in the x-r coordinate system are respectively corresponding to D 1(xD1,rD1) and D 2(xD2,rD2), and an included angle between the axis and any point on the airfoil middle line of the bottom layer and the connecting line of the first front intersection point is an installation angle alpha 1;
The intersection points of the top layer, the front edge and the tail edge on the wing profile middle line of the top layer are a fourth front intersection point and a fourth tail intersection point respectively, the projection points of the fourth front intersection point and the fourth tail intersection point in the x-r coordinate system are A 1(xA1,rA1) and A 2(xA2,rA2 respectively), and an included angle between a connecting line of any point on the wing profile middle line of the top layer and the fourth front intersection point and the axis is a mounting angle alpha 4;
Note (x1-xD2)/(xD1-xD2)＝δD,(x4-xA2)/(xA1-xA2)＝δA,α1 and a 4 each satisfy the following formulas:
α1＝(-59.751δD 3+133.42δD 2-52.694δD+52.882±5)°；
α4＝(-54.766δA 3+97.065δA 2-29.831δA+59.387±5)°。
3. The axial flow wind wheel according to claim 1, wherein the blade is divided into a plurality of longitudinally extending layers between the leading edge and the trailing edge, and a plurality of transversely extending wing-shaped layers between the bottom layer and the top layer, the longitudinally extending layers and the transversely extending wing-shaped layers are mutually staggered, the projection curve of any longitudinally extending layer corresponding to the x-r coordinate system is l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) (n e [1, n ]), and l Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) is calculated by interpolation operation; the projection curve corresponding to any transverse airfoil layer in the x-r coordinate system is L Transverse bar λ(x Transverse bar λ,r Transverse bar λ) (lambda epsilon (0, 1)), the curve length of L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) cut by the projection curve corresponding to the bottom layer and the projection curve corresponding to the top layer is L longitudinal n, the curve length of any point (x Longitudinal direction n,r Longitudinal direction n) on L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) cut by the projection curve corresponding to the bottom layer on L Longitudinal direction n(x Longitudinal direction n,r Longitudinal direction n) is L longitudinal n', L Longitudinal direction n′/L Longitudinal direction n =lambda is marked, and L Transverse bar λ(x Transverse bar λ,r Transverse bar λ) is a curve formed by connecting a plurality of points with identical lambda values on L longitudinal n (x Longitudinal direction n,r Longitudinal direction n).
4. The axial flow wind wheel of claim 3, wherein when λ=0.5, curve l Transverse bar 0.5(x Transverse bar 0.5,r Transverse bar 0.5) corresponds to a second transverse airfoil layer of the blade, intersections of an airfoil centerline of the second transverse airfoil layer with the leading edge and the trailing edge are a second leading intersection point and a second trailing intersection point, respectively, projection points of the second leading intersection point and the second trailing intersection point in the x-r coordinate system are C 1(xC1,rC1) and C 2(xC2,rC2), and an angle between a line connecting any point x 2 on the second transverse airfoil layer and the C 1(xC1,rC1) and the axis is a mounting angle α 2, denoted (x 2-xC2)/(xC1-xC2)＝δC, wherein:
α2＝(-172.04δC 3+281.7δC 2-90.718δC+54.985±5)°。
5. The axial flow wind wheel of claim 4, wherein when λ=0.945, curve l Transverse bar 0.945(x Transverse bar 0.945,r Transverse bar 0.945) corresponds to a third transverse airfoil layer of the blade, intersections of an airfoil centerline of the third transverse airfoil layer with the leading edge and the trailing edge are a third leading intersection point and a third trailing intersection point, respectively, projection points of the third leading intersection point and the third trailing intersection point in the x-r coordinate system are B 1(xB1,rB1) and B 2(xB2,rB2), and an angle between a line connecting any point x 3 on the third transverse airfoil layer and the B 1(xB1,rB1) and the axis is a mounting angle α 3, denoted (x 3-xB2)/(xB1-xB2)＝δB, wherein:
α3＝(-63.367δB 3+104.37δB 2-24.213δB+55.689±5)°。
6. The axial flow wind wheel of claim 5, wherein the maximum thickness t max and the minimum thickness t min of each transverse airfoil layer blade region satisfy t max/tmin +.3.
7. The axial flow wind turbine of any one of claims 1 to 6, wherein the thickness of the top layer is: thickness of the bottom layer= (1.1-2.5): (4-8).
8. The axial flow wind turbine of any one of claims 1 to 6, wherein k1=k2.
9. A household appliance comprising an axial flow wind turbine as claimed in any one of claims 1 to 8.
10. The household appliance of claim 9, wherein the household appliance is a dehumidifier, the dehumidifier further comprises a housing, a heat exchanger positioned in the housing, a middle partition plate and a compressor, the middle partition plate is positioned between the heat exchanger and the compressor, the housing comprises an air inlet and an air outlet, the heat exchanger is arranged close to the air inlet, the axial flow wind wheel is arranged close to the air outlet, and the axial flow wind wheel drives air to be blown out from the air outlet after passing through the heat exchanger.
CN201810493243.1A 2018-05-22 2018-05-22 Axial flow wind wheel and household appliance Active CN108561335B (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208364478U (en) * 2018-05-22 2019-01-11 广东美的制冷设备有限公司 Axial-flow windwheel and household electrical appliance

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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JP2932975B2 (en) * 1995-08-31 1999-08-09 三菱電機株式会社 Axial blower, air conditioner
JPH10311296A (en) * 1997-05-14 1998-11-24 Matsushita Seiko Co Ltd Blower
JP4818184B2 (en) * 2007-04-09 2011-11-16 三菱電機株式会社 Propeller fan
CN101718279B (en) * 2009-12-17 2011-09-07 四川长虹空调有限公司 Axial flow fan for air conditioner
CN107165862B (en) * 2017-06-23 2019-03-29 广东美的制冷设备有限公司 Wind wheel and refrigeration equipment with it

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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