CN1844758A

CN1844758A - Fan volute structure with air inlets on double sides for European-style smoke exhaust ventilator

Info

Publication number: CN1844758A
Application number: CNA2006100506396A
Authority: CN
Inventors: 茅忠群
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2006-04-30
Filing date: 2006-04-30
Publication date: 2006-10-11
Anticipated expiration: 2026-04-30
Also published as: CN100357611C

Abstract

The invention discloses a wind engine volute of Europe-type kitchen ventilator, which can adsorb wind via two surfaces. Wherein, the front and back cover plates (1, 2) are both mounted with wind inlets (11, 21); the edge of front cover plate (1) is formed by a straight line (AB), several arcs (BC, CD, DE, EF, FG, GH) and straight lines (HJ, JA); the edge of back cover plate (2) is formed by a straight line (A'B'), several arcs (B'C, C'D', D'E', E'F', F'G, G'H'), and a straight line (H'A'); the ratio between the radius of edge (FG) at the volute tongue of front cover plate (1) and the edge radius of edge (G'H') at the volute tongue of back cover plate (2) is 7.3-18.5. Compared to present technique, the invention can generate a new noise source at the volute tongue, which is reverse to other noise, to be eliminated some.

Description

The blower volute structure of the European range hood that a kind of energy is double-faced ventilated

Technical field

The present invention relates to a kind of component structural of range hood, the blower volute structure of the European range hood that particularly a kind of energy is double-faced ventilated.

Background technology

Now, range hood has become one of requisite machine for kitchen use equipment of average family, and at present, European-style range hood because of have outward appearance neatly lightly, the advantage such as little that takes up room, be subjected to increasing consumer's favor.European-style range hood generally comprises the range hood case, is positioned at the motor of volute of blower, impeller and the drives impeller of blower hood also perpendicular on the case, blower hood, wherein volute of blower comprises front shroud, back shroud and is connected the two ring-type middle casing, have air inlet on the front shroud, back shroud is provided with motor, and impeller is promptly between forward and backward cover plate.And the difference of European-style range hood and traditional lampblack absorber maximum is: air inlet is positioned at the side of volute of blower, it is the single side face air intake, its incoming air area is less, the mist extractor amount is not very desirable, therefore, some can be invented by double-faced ventilated volute of blower, as the patent No. is a kind of scheme the Chinese utility model patent " two air-inlet range hood " of ZL200420082377.8 (notification number is CN2729555Y) just provides, it is preceding, all have air inlet on the back shroud, oil smoke promptly on the air inlet from the front shroud and the back shroud gap between motor and the air inlet enter volute of blower.

Simultaneously, the blower fan of range hood adopts centrifugal blower more, and always there is noise in it when real work, and noise is generally from two aspects, and the one, the noise of blower fan itself, the 2nd, the noise that air-flow moves and sends because of turbulization in volute of blower.At present, occurred many at reducing the denoising structure design that noise source is made, and in noise reduction technology, a kind of in addition " active noise reduction " principle, promptly form artificially one identical with noise source amplitude size but new sound source that phase place is opposite offsets former noise, yet through spectrum analysis, the noise of range hood is one all has the continuous spectrum of suitable intensity in the scope of 20Khz at 6.3Hz, therefore to offset fully and be difficult to accomplish, but will accomplish that part offsets or possible.For this reason, " a kind of blower volute structure of top-sucking kitchen ventilator " of our ZL01132056.7 of Chinese invention patent formerly (notification number is CNCN1140703C) just provides a kind of design of active noise reduction, the ring-type middle casing that it comprises upper shell, lower house and is connected the two, upper shell and lower house are dissymmetrical structure, at snail tongue place, the radius of curvature of lower house edge contour is 5: 29.1 with the ratio of the radius of curvature of upper shell edge contour, and the middle casing at this place then is connected both with the warp surface of continuously smooth transition.This volute of blower is its design of different curvature radius of shell rim profile up and down at snail tongue place, can not be applicable to the volute of blower of European range hood fully, and for the volute of blower of the double-faced ventilated European range hood of energy, this radius of curvature need redesign.

Summary of the invention

Technical problem to be solved by this invention provides a kind of utilization " active noise reduction " principle and effectively reduces the European-style range hood noise, makes the blower volute structure of the double-faced ventilated European range hood of the also improved energy of blast, air quantity simultaneously.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: the blower volute structure of the European range hood that this energy is double-faced ventilated, comprise front shroud, back shroud and be connected the two ring-type middle casing, all have air inlet on described front shroud and the back shroud, and described front shroud and back shroud are dissymmetrical structure at snail tongue place, the middle casing at this place then is connected both with the warp surface of continuously smooth transition, it is characterized in that:

1. the edge contour of front shroud is made up of the first straight line AB, the first circular arc BC, the second circular arc C D, three-arc DE, the 4th circular arc EF, the 5th circular arc FG, the 6th circular arc GH and the second straight line HJ of tangent and rounding off successively and the 3rd straight line JA that is connected end points at the whole story;

2. the edge contour of back shroud is made up of first straight line A ' B ', first circular arc B ' C ', second circular arc C ' D ', three-arc D ' E ', the 4th circular arc E ' F ', the 5th circular arc F ' G ', the 6th circular arc G ' H ' of tangent and rounding off successively and the 3rd straight line H ' A ' of connecting end points at the whole story;

Be on the edge contour of front shroud from the first five some A, the B at top, C, D, E respectively with the back shroud edge contour on from the first five of top put A ', B ', C ', D ', E ' is corresponding, the 6th some F on the front shroud edge contour is corresponding with the 7th some G ' on the back shroud edge contour; The the 7th, eight, nine some G on the front shroud edge contour, H, J are corresponding with distal point H ' on the back shroud edge contour;

3. described front shroud is in the radius of curvature and the ratio (R1: R2) be 7.3: 18.5 of back shroud in the radius of curvature of the edge contour G ' H ' at snail tongue place of the edge contour FG at snail tongue place.

For the edge contour that makes forward and backward cover plate slick and sly more, thereby effectively prevented the separation of air-flow, can do following improvement:

1. the 4th circular arc EF, the three-arc DE on the described front shroud, the second circular arc C D, the first circular arc BC are the radius of curvature initial point with four different some a, b, c, d respectively, rounding off between the adjacent circular arc, the ratio of four radius of curvature (Ra: Rb: Rc: Rd) be 113: 124.6: 139.5: 156.2, and the coordinate of four radius of curvature initial point relative coordinate initial point o is respectively: a (6.28,6.28), b (7.04,7.04), c (7.88 ,-7.88), d (8.8,8.8);

2. the 5th circular arc F ' G ' on the described back shroud, the 4th circular arc E ' F ', three-arc D ' E ', second circular arc C ' D ', first circular arc B ' C ' is five different some o ' respectively, a ', b ', c ', d ' is the radius of curvature initial point, rounding off between the adjacent circular arc, the ratio of five radius of curvature (Ro ': Ra ': Rb ': Rc ': Rd ') be 118.7: 113: 124.6: 139.5: 156.2, and the coordinate of back four radius of curvature initial point relative coordinate initial point o ' is respectively: a ' (6.28,6.28), b ' (7.04,7.04), c ' (7.88,-7.88), d ' (8.8,8.8).

Compared with prior art, the invention has the advantages that: by to of the design of forward and backward cover plate in snail tongue place different curvature radius, make air-flow produce a new noise source at snail tongue place, this new noise source and air-flow can effectively be offset a part of former noise along the noise phase place of other position generation of middle casing is opposite; On the other hand, this range hood to forward and backward cover plate in the processing that is further optimized of other edge contour curves everywhere, on the basis of noise reduction, also effectively prevented the separation of air-flow, for blast, air quantity index have been made contribution, also subdued when air communication is crossed spiral case simultaneously to a certain extent and the noise total amount of its friction generation, combination property is good;

Simultaneously, kept the double-faced ventilated large tracts of land air intake advantage in front and back, have also that volume is little, the characteristics of air quantity big (greater than 12m3/min), blast height (greater than 260Pa), noise low (being not more than 54dB (A)), the equilibrium and the matching that more show air quantity, blast, noise, power, each index of rotating speed are good, can satisfy the combination property higher requirement that Chinese kitchen environment heavy wool is greasy, Gao Zhiyan proposes range hood preferably.

Description of drawings

Fig. 1 is the application state schematic diagram of the embodiment of the invention;

Fig. 2 is that the A-A of Fig. 1 is to cutaway view;

Fig. 3 is the perspective view of the embodiment of the invention;

Fig. 4 is the front view of the embodiment of the invention;

Fig. 5 is the rearview of the embodiment of the invention;

Fig. 6 is the edge contour figure that the front shroud of spiral case launches projection;

Fig. 7 is the edge contour figure that the back shroud of spiral case launches projection.

The specific embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As Fig. 1～shown in Figure 5, the blower volute structure of the European range hood that this energy is double-faced ventilated, comprise front shroud 1, back shroud 2 and be connected the two ring-type middle casing 3, all have air inlet 11,21 on described front shroud 1 and the back shroud 2, and described front shroud 1 is dissymmetrical structure with back shroud 2 at snail tongue place, and the middle casing 3 at this place then is connected both with the warp surface of continuously smooth transition; The state of the practical application of this blower volute structure, referring to Fig. 1 and Fig. 2,4 is blower hood, 5 is the impeller between front shroud 1, back shroud 2, the motor 6 of drives impeller 5;

As shown in Figure 6 and Figure 7,1. the edge contour of front shroud 1 is made up of the first straight line AB, the first circular arc BC, the second circular arc C D, three-arc DE, the 4th circular arc EF, the 5th circular arc FG, the 6th circular arc GH and the second straight line HJ of tangent and rounding off successively and the 3rd straight line JA that is connected end points at the whole story;

2. the edge contour of back shroud 2 is made up of first straight line A ' B ', first circular arc B ' C ', second circular arc C ' D ', three-arc D ' E ', the 4th circular arc E ' F ', the 5th circular arc F ' G ', the 6th circular arc G ' H ' of tangent and rounding off successively and the 3rd straight line H ' A ' of connecting end points at the whole story;

Be on the edge contour of front shroud 1 from the first five some A, the B at top, C, D, E respectively with back shroud 2 edge contours on from the first five of top put A ', B ', C ', D ', E ' is corresponding, the 6th some F on front shroud 1 edge contour is corresponding with the 7th some G ' on back shroud 2 edge contours; The the 7th, eight, nine some G on front shroud 1 edge contour, H, J are corresponding with distal point H ' on back shroud 2 edge contours;

3. described front shroud 1 is in the radius of curvature and the ratio R1 of back shroud 2 in the radius of curvature of the edge contour G ' H ' at snail tongue place of the edge contour FG at snail tongue place: R2 is 7.3: 18.5.

4. the 4th circular arc EF, the three-arc DE on the described front shroud 1, the second circular arc C D, the first circular arc BC are the radius of curvature initial point with four different some a, b, c, d respectively, rounding off between the adjacent circular arc, the ratio Ra of four radius of curvature: Rb: Rc: Rd is 113: 124.6: 139.5: 156.2, and the coordinate of four radius of curvature initial point relative coordinate initial point o is respectively: a (6.28,6.28), b (7.04,7.04), c (7.88 ,-7.88), d (8.8,8.8);

5. the 5th circular arc F ' G ' on the described back shroud 2, the 4th circular arc E ' F ', three-arc D ' E ', second circular arc C ' D ', first circular arc B ' C ' is five different some o ' respectively, a ', b ', c ', d ' is the radius of curvature initial point, rounding off between the adjacent circular arc, the ratio Ro ' of five radius of curvature: Ra ': Rb ': Rc ': Rd ' is 118.7: 113: 124.6: 139.5: 156.2, and the coordinate of back four radius of curvature initial point relative coordinate initial point o ' is respectively: a ' (6.28,6.28), b ' (7.04,7.04), c ' (7.88,-7.88), d ' (8.8,8.8).

Claims

1, the blower volute structure of the double-faced ventilated European range hood of a kind of energy, comprise front shroud (1), back shroud (2) and be connected the two ring-type middle casing (3), all have air inlet (11,21) on described front shroud (1) and the back shroud (2), and described front shroud (1) is dissymmetrical structure with back shroud (2) at snail tongue place, the middle casing at this place (3) then is connected both with the warp surface of continuously smooth transition, it is characterized in that:

1. the edge contour of front shroud (1) is made up of first straight line (AB), first circular arc (BC), second circular arc (CD), three-arc (DE), the 4th circular arc (EF), the 5th circular arc (FG), the 6th circular arc (GH) and second straight line (HJ) of tangent and rounding off successively and the 3rd straight line (JA) that is connected end points at the whole story;

2. the edge contour of back shroud (2) is made up of first straight line (A ' B '), first circular arc (B ' C '), second circular arc (C ' D '), three-arc (D ' E '), the 4th circular arc (E ＇ F ＇), the 5th circular arc (F ' G '), the 6th circular arc (G ' H ') of tangent and rounding off successively and the 3rd straight line (H ' A ') that connects end points at the whole story;

Wherein, on the edge contour of front shroud (1) from the first five point (A, B, C, D, E) at top respectively with back shroud (2) edge contour on corresponding from the first five point at top (A ', B ', C ', D ', E '), the 6th point (F) on front shroud (1) edge contour is corresponding with the 7th point (G ') on back shroud (2) edge contour; The the 7th, eight, nine point (G, H, J) on front shroud (1) edge contour is corresponding with distal point (H ') on back shroud (2) edge contour;

3. described front shroud (1) is at the radius of curvature of the edge contour (FG) at snail tongue place and back shroud (2) ratio (R1: R2) be 7.3: 18.5 in the radius of curvature of the edge contour (G ' H ') at snail tongue place.

2, the blower volute structure of the double-faced ventilated European range hood of energy according to claim 1 is characterized in that:

1. the 4th circular arc (EF) on the described front shroud (1), three-arc (DE), second circular arc (CD), first circular arc (BC) are the radius of curvature initial point with four different points (a, b, c, d) respectively, rounding off between the adjacent circular arc, the ratio of four radius of curvature (Ra: Rb: Rc: Rd) be 113: 124.6: 139.5: 156.2, and the coordinate of four radius of curvature initial point (a, b, c, d) relative coordinate initial points (o) is respectively: (6.28,6.28), (7.04,7.04), (7.88,-7.88), (8.8,8.8);

2. the 5th circular arc (F ' G ') on the described back shroud (2), the 4th circular arc (E ＇ F ＇), three-arc (D ' E '), second circular arc (C ' D '), five different points of first circular arc (B ' C ') difference (o ', a ', b ', c ', d ') is the radius of curvature initial point, rounding off between the adjacent circular arc, the ratio of five radius of curvature (Ro ': Ra ': Rb ': Rc ': Rd ') be 118.7: 113: 124.6: 139.5: 156.2, and back four radius of curvature initial points (a ', b ', c ', d ') coordinate of relative coordinate initial point (o ') is respectively: (6.28,6.28), (7.04,7.04), (7.88,-7.88), (8.8,8.8).