CN113883088A

CN113883088A - Method for manufacturing impeller with double-blade structure of range hood and impeller manufactured by method

Info

Publication number: CN113883088A
Application number: CN202111332721.9A
Authority: CN
Inventors: 杨彩云; 林镇荣; 尹华; 郭华芳; 李家杰
Original assignee: Guangzhou Institute of Energy Conversion of CAS
Current assignee: Guangzhou Institute of Energy Conversion of CAS
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-01-04

Abstract

The invention discloses a method for manufacturing an impeller with a double-blade structure of a range hood and the impeller manufactured by the method. Wherein the first arc-shaped blade is provided with a tongue-shaped piece for fixing the blade; the second arc-shaped blade is provided with a key groove for fixing the blade, the first arc-shaped blade and the second arc-shaped blade are equal in width, and the second arc-shaped blade is nested on the first arc-shaped blade through the key groove during installation; the blade fixing plate is divided into a blade fixing plate front plate and a blade fixing plate rear plate, and an arc-shaped blade tongue-shaped hole is formed in the blade fixing plate and used for fixing the first arc-shaped blade; the motor fixing plate is provided with an arc-shaped blade tongue-shaped hole, a motor heat dissipation hole and a motor mounting hole. The design through the bilobed leaf structure can reduce the air pressure difference between the blade runner of blade air inlet department, eliminates the eddy current loss between the blade runner, promotes the flow of lampblack absorber, reduces the noise at work of lampblack absorber.

Description

Method for manufacturing impeller with double-blade structure of range hood and impeller manufactured by method

Technical Field

The invention relates to the technical field of range hoods, in particular to a method for manufacturing an impeller with a double-blade structure of a range hood and the impeller manufactured by the method.

Background

With the gradual improvement of the living standard of people in China, the range hood becomes a necessary kitchen household appliance in the families of the residents. Most of existing range hoods adopt a multi-wing centrifugal fan, an impeller structure of the existing range hood is composed of single arc-shaped blades which are distributed annularly at equal intervals, smoke is sucked from the center of an impeller in the axial direction during working and is radially thrown out through the single arc-shaped blades which are distributed annularly at equal intervals, the impeller structure is single, when the smoke enters blade runners from the center of the impeller, air pressure distribution on the cross section of an air inlet of each blade is not uniform due to the impact of high-speed airflow at an air inlet of each blade, air pressure difference is easily formed among the blade runners, and vortex cyclone is generated among the blade runners due to the smoke, so that the working efficiency of the range hood is reduced, and the working noise of the range hood is also improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a method for manufacturing an impeller with a double-blade structure of a range hood and the impeller manufactured by the method.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a manufacturing method of an impeller with a double-blade structure of a range hood comprises the following steps:

the molded line of the second blade is approximately divided into three sections of arc lines with different radiuses B2, B3 and B4 according to the pressure distribution characteristics among the single arc-shaped blade runners, wherein the arc radiuses of the arc line B2 and the arc line B4 are equal to the arc radius of the first blade;

the arc line B3 adopts a non-uniform rational spline curve, and the curvature of the arc line B3 is adjusted by control points P0, P1, P2 and P3 to be gradually reduced from the blade air inlet side to the blade air outlet side; the distance between the control point P0 and the end point M of the first arc-shaped blade is 1-2 mm, and the distance between the control point P3 and the end point N of the first arc-shaped blade is 1-2 mm, so that a key groove of the second arc-shaped blade is mainly formed, and the second arc-shaped blade is convenient to fix; the control points P1 and P2 are two vertexes of an isosceles right triangle OP1P2 respectively, the length of a right-angle side P2O is 5-6 mm, and the control points are mainly used for controlling the curvature of an arc line B3 of the second arc-shaped blade, the second arc-shaped blade cannot be easily installed due to too small value, and the resistance among blade runners is easily increased due to too large value. The angle of the point P2 is a right angle, the point O is the midpoint of the connecting line of the two endpoints M, N of the first arc-shaped blade, and the connecting line of the control points P1 and P2 is parallel to the connecting line of the two endpoints M, N of the first arc-shaped blade.

An impeller with a double-blade structure for a range hood comprises a first blade and a second blade which are manufactured by the manufacturing method of the impeller with the double-blade structure for the range hood, wherein the cross section of the first blade is arc-shaped, and two ends in the length direction are provided with first connecting parts; the cross section of the second blade is arc-shaped, and two ends in the length direction are provided with second connecting parts; further comprising:

the blade fixing plate front plate and the blade fixing plate rear plate are both circular and are provided with third connecting parts at equal intervals along a circular ring; and the number of the first and second groups,

a motor fixing plate, wherein the middle part of the motor fixing plate is provided with a circular truncated cone space for accommodating a motor, the periphery of the circular truncated cone space is annular, fourth connecting parts are distributed on the periphery of the annular at equal intervals, wherein,

the first connecting portion of first blade with the second connecting portion installation cooperation of second blade forms the double-blade structure, blade fixed plate front bezel with be equipped with a plurality of double-blade structures between the blade fixed plate backplate, the double-blade structure passes the fourth connecting portion of motor fixed plate, it is specific, the first connecting portion of the one end of double-blade structure install extremely the third connecting portion of blade fixed plate front bezel, the first connecting portion of the other end of double-blade structure install extremely the third connecting portion of blade fixed plate backplate.

The impeller with the double-blade structure of the range hood further comprises a first connecting part and a second connecting part, wherein the first connecting part is a flange extending towards the length direction, and the outer side of the flange is provided with a smooth boundary.

The double-blade structure impeller of the range hood is characterized in that the flange is a tongue-shaped sheet.

According to the double-blade structure impeller of the range hood, the third connecting portion is a tongue-shaped hole.

According to the double-blade structure impeller of the range hood, the fourth connecting portion is a tongue-shaped hole.

The double-blade structure impeller of the range hood further comprises a groove bent inwards.

The double-blade structure impeller of the range hood further comprises a first blade and a second blade which are arranged in parallel.

According to the range hood double-blade structure impeller, further, the distance between the motor fixing plate and the blade fixing plate rear plate is 2/5 of the width of the double-blade structure impeller.

According to the double-blade structure impeller of the range hood, further, the motor fixing plate is provided with the motor heat dissipation holes and the motor mounting holes.

Compared with the prior art, the invention has the beneficial effects that: the impeller with the double-blade structure is simple in structure and convenient and fast to install; when the air-cooled fan works, smoke is axially sucked from the center of the impeller and radially thrown out through the wing-shaped blades which are distributed at equal intervals in an annular mode. Due to the design of the double-blade wing-shaped structure, when smoke enters the blade flow channel from the center of the impeller, the convex part of the air inlet side of the 2 blades of the second arc-shaped blade fills the partial negative pressure area between the blade flow channels, the air pressure difference between the blade flow channels is reduced, the vortex cyclone between the blade flow channels is eliminated, the vortex loss of the smoke inside the range hood is reduced, the flow of the range hood is improved, the working static pressure of the range hood is improved, the working efficiency of the range hood is improved, in addition, the working noise of the range hood is reduced through the design of the double-blade structure impeller, and the motor energy consumption of the range hood is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a first cambered vane of an embodiment of the present invention;

FIG. 2 is a schematic view of a camber line of a first cambered vane of an embodiment of the present invention;

FIG. 3 is a schematic structural view of a second cambered vane of the embodiment of the invention;

FIG. 4 is a schematic view of an arc line of a second cambered vane of the embodiment of the invention;

FIG. 5 is a schematic structural view of a dual blade configuration of an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a blade fixing plate according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a motor fixing plate according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an impeller with a double-blade structure according to an embodiment of the present invention.

Wherein: 1. a first arcuate vane; 11. a tongue-shaped piece; 2. a second arcuate vane; 21. a keyway; 3. a blade fixing plate; 31. a blade fixing plate front plate; 32. a blade fixing plate rear plate; 33. a first tongue-shaped hole; 4. a motor fixing plate; 41. a second tongue-shaped hole; 42. a heat dissipation hole of the motor; 43. a motor mounting hole;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example (b):

it should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The utility model provides a lampblack absorber biplate structure impeller, its structure comprises first arc blade 1, second arc blade 2, blade

fixed plate

3 and 4 four bibliographic categories of motor fixed plate.

The first arc-shaped blade 1 is provided with a tongue-shaped piece 11 for fixing the blade, and the blade is uniformly and annularly fixed on the blade fixing plate 3 at equal intervals through the tongue-shaped piece 11. The first arc-shaped blade 1 is a single arc-shaped blade, the wind inlet angle alpha of the blade formed by the tangent of the intersection point of the arc-shaped line of the blade and the inlet diameter D1 of the blade is 90 degrees, and the wind outlet angle beta of the blade formed by the tangent of the intersection point of the arc-shaped line of the blade and the outer diameter D2 of the impeller is 155 degrees; the thickness of the first cambered vane 1 is 0.5 mm.

Be equipped with the keyway 21 that is used for the fixed blade on the second arc blade 2, second arc blade 2 and first arc blade 1 are the same width, form the bilobed blade structure through keyway 21 with second arc blade 2 nestification on first arc blade 1 during the installation, then pass the tongue-shaped hole on blade fixed plate 3 and the motor fixed plate 4 respectively in proper order with the multiunit bilobed blade structure that first arc blade 1 and second arc blade 2 are constituteed, stretch out tongue-shaped piece 11 that blade fixed plate 3 both sides were out again along impeller direction of rotation buckle 90, through the bilobed blade structure that multiunit first arc blade 1 and second arc blade 2 are constituteed with blade fixed plate 3 and motor fixed plate 4 connect as a whole, form complete impeller, in order to alleviate the weight of impeller, 0.3mm is selected to the thickness of second arc blade 2.

The method for determining the profile of the second cambered vane 2 comprises the following steps:

the molded line of the second arc-shaped blade 2 is approximately divided into three sections (B2, B3 and B4) of arc lines with unequal radiuses according to the pressure distribution characteristics among the single arc-shaped blade runners, wherein the arc radiuses of the arc lines B2 and B4 are equal to the arc radius of the first arc-shaped blade 1, and the aim is to form key grooves 21 of the second arc-shaped blade 2 at two ends of the first arc-shaped blade 1; the arc line B3 adopts a non-uniform rational spline curve, and the curvature of the arc line B3 is adjusted by control points P0, P1, P2 and P3 to be gradually reduced from the blade air inlet side to the blade air outlet side. The distance between the control point P0 and the end point M of the first arc-shaped blade 1 is 1-2 mm, and the distance between the control point P3 and the end point N of the first arc-shaped blade 1 is 1-2 mm, so that a key groove of the second arc-shaped blade 2 is mainly formed, and the second arc-shaped blade 2 is convenient to fix; the control points P1 and P2 are two vertexes of an isosceles right triangle OP1P2 respectively, the length of a right-angle side P2O is 5-6 mm, and the control points are mainly used for controlling the curvature of an arc line B3 of the second arc-shaped blade 2, the second arc-shaped blade 2 cannot be easily installed due to too small value, and the resistance among blade runners is easily increased due to too large value. The angle of the point P2 is a right angle, the point O is the midpoint of the connecting line of the two endpoints M, N of the first arc-shaped blade 1, and the connecting line of the control points P1 and P2 is parallel to the connecting line of the two endpoints M, N of the first arc-shaped blade 1.

The blade fixing plate 3 is divided into a blade fixing plate front plate 31 and a blade fixing plate rear plate 32, the blade fixing plate front plate 31 and the blade fixing plate rear plate 32 are symmetrically distributed, and a first tongue-shaped hole 33 is formed in the blade fixing plate 3 according to the shape of a first arc-shaped blade 1 tongue-shaped piece and used for fixing the first arc-shaped blade 1.

The motor fixing plate 4 is arranged between the blade fixing plate front plate 31 and the blade fixing plate rear plate 32, and the distance from the blade fixing plate rear plate 32 is 2/5 of the width of the impeller. The motor fixing plate 4 is provided with a second tongue-shaped hole 41 of the blade, a heat dissipation hole 42 of the motor and a mounting hole 43 of the motor according to the molded line of the double-blade structure.

When the air-cooled fan works, smoke is axially sucked from the center of the impeller and radially thrown out through the wing-shaped blades which are distributed at equal intervals in an annular mode. Due to the design of the double-blade wing-shaped structure, when smoke enters the blade flow channel from the center of the impeller, the convex part of the air inlet side of the 2 blades of the second arc-shaped blade fills the partial negative pressure area between the blade flow channels, the air pressure difference between the blade flow channels is reduced, the vortex cyclone between the blade flow channels is eliminated, the vortex loss of the smoke inside the range hood is reduced, the flow of the range hood is improved, the working static pressure of the range hood is improved, the working efficiency of the range hood is improved, in addition, the working noise of the range hood is reduced through the design of the double-blade structure impeller, and the motor energy consumption of the range hood is reduced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.

Claims

1. A manufacturing method of an impeller with a double-blade structure of a range hood is characterized by comprising the following steps:

the molded line of the second blade is approximately divided into three sections of arc lines with unequal radiuses B2, B3 and B4 according to the pressure distribution characteristic among the single-arc blade channels, wherein the arc radiuses of the arc line B2 and the arc line B4 are equal to the arc radius of the first blade;

the arc line B3 adopts a non-uniform rational spline curve, and the curvature of the arc line B3 is adjusted by control points P0, P1, P2 and P3 to be gradually reduced from the blade air inlet side to the blade air outlet side; the distance between the control point P0 and the end point M of the first arc-shaped blade is 1-2 mm, and the distance between the control point P3 and the end point N of the first arc-shaped blade is 1-2 mm; the control points P1 and P2 are two vertexes of an isosceles right triangle OP1P2 respectively, the length of a right-angle side P2O is 5-6 mm, the angle of the point P2 is a right angle, the point O is the midpoint of the connecting line of the two end points M, N of the first arc-shaped blade, and the connecting line of the control points P1 and P2 is parallel to the connecting line of the two end points M, N of the first arc-shaped blade.

2. An impeller with a double-blade structure for a range hood, which is characterized by comprising a first blade and a second blade which are manufactured by the manufacturing method of the impeller with the double-blade structure for the range hood according to claim 1, wherein the cross section of the first blade is arc-shaped, and two ends in the length direction are provided with first connecting parts; the cross section of the second blade is arc-shaped, and two ends in the length direction are provided with second connecting parts; further comprising:

3. The range hood double-blade structure impeller of claim 2, wherein the first connecting portion is a flange extending in a length direction, and a rounded boundary is formed at an outer side of the flange.

4. The range hood double-bladed structure impeller of claim 3, characterized in that said flanges are tongue-shaped pieces.

5. The range hood double-blade structure impeller of claim 4, wherein the third connecting portion is a tongue-shaped hole.

6. The range hood double-blade structure impeller of claim 4, wherein the fourth connecting portion is a tongue-shaped hole.

7. The range hood double-vane structure impeller of claim 2, wherein the second connecting portion has a groove bent inward.

8. The range hood double-vane structure impeller of claim 2, wherein the first vane and the second vane have equal widths.

9. The range hood double-blade structure impeller of claim 2, wherein a distance between the motor fixing plate and the blade fixing plate back plate is 2/5 times the width of the double-blade structure impeller.

10. The range hood double-blade structure impeller as claimed in claim 2, wherein the motor fixing plate is provided with a motor heat dissipation hole and a motor mounting hole.