CN101294725B

CN101294725B - Ventilator air outlet cover with active noise reduction function

Info

Publication number: CN101294725B
Application number: CN200810061936XA
Authority: CN
Inventors: 茅忠群
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2008-05-27
Filing date: 2008-05-27
Publication date: 2010-06-09
Anticipated expiration: 2028-05-27
Also published as: CN101294725A

Abstract

A hood of a range hood has a noise-reduction function and includes a hood body (2). The hood body (2) is provided with an air outlet (3) and an air inlet (4) connected with a volute casing air outlet. The hood is characterized in that the peripheral wall of the hood body (2) is a smooth surface, and extends upwards from the air inlet (4) to form a volute tongue (5), and the radius of curvature of the volute tongue (5) is gradually enlarged or reduced. Compared with the prior art, the hood has the advantages that the design of the volute tongue on the hood body enables the volute casing air outlet connected with the hood to be designed without volute tongue, the structure is simplified, the hood body can adopts plastic materials, the volute tongue of the hood body can be integrally shaped by injection molding, metal materials can be adopted in the volute casing, the manufacture cost is greatly reduced compared with the molding cost in the volute casing, and the production efficiency is greatly improved; the volute tongue is utilized to reduce the active noise via the optimum design of the peripheral wall of the hood body, and the noise is reduced obviously.

Description

Ventilator air outlet cover with active noise reduction function

Technical field

The present invention relates to a kind of range hood parts, relate in particular to a kind of ventilator air outlet cover that cooperates air-out with spiral case with active noise reduction function.

Background technology

Nowadays, range hood has become one of requisite household electrical appliances in the life of urban resident, its function is indoor oil smoke is siphoned away and to be discharged outdoor by the exhaust smoke hole on the wall, during installation, generally link to each other with exhaust smoke hole, by present house architectural structure by the outlet of airduct with lampblack absorber, being provided with of exhaust smoke hole has two kinds substantially, first kind is directly to connect to outdoor, and second kind is to connect to public flue earlier, is communicated with atmosphere by public flue then.For first kind, but generally install one additional and have a plurality of foldings and cut down the air door of sheet and realize by stretch out an outdoor end at airduct; For second kind, connect the outlet housing setting between cooking-fume exhauster blower outlet and the airduct.

Common outlet housing comprises cover body and non-return valve block, and this cover body has a rectangle air inlet and a circular air outlet, and non-return valve block then is located at air outlet.But the Chinese utility model patent before the concrete REFERENCE TO RELATED people: ZL00218535.0 and ZL02218005.2.Yet existing outlet housing is still waiting further to improve in the research aspect air-out performance and the reduction noise.

Prior art is for reducing noise, is provided with the snail tongue at the air-out port of spiral case and realizes the Chinese patent before the REFERENCE TO RELATED people: ZLZL200420082377.8, ZL200620103332.3 etc.Because spiral case adopts metal material basically, so the moulding of snail tongue is more difficult time-consuming, manufacturing cost is high, remains further to be improved.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of noise and ventilator air outlet cover cheap for manufacturing cost of reducing at above-mentioned prior art present situation, and this outlet housing has the snail tongue with the end that is connected of spiral case.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: this has the ventilator air outlet cover of active noise reduction function, comprise cover body, the air inlet that this cover body has an air outlet and is connected with spiral case air-out port, the perisporium that it is characterized in that described cover body is a shiny surface, and its perisporium has extended upward a snail tongue by air inlet.

Be further to reduce noise, the radius of curvature of described snail tongue is and enlarges gradually or dwindle shape.Promptly be designed to become R snail tongue.

Further optimal design, for obtaining preferable reduction noise result and satisfied air output, air inlet is a trapezoidal faces, first summit is arranged on this trapezoidal faces, second summit, the 3rd summit and the 4th summit, wherein, first summit is relative with the 3rd summit and adjacent with the 4th summit with second summit, first summit is parallel with the connecting line on the 4th summit with the 3rd summit with the connecting line on second summit, accordingly, described air outlet is a circular face, be evenly equipped with first point on the circumference of this circular face, second point, thirdly with the 4th point, wherein first with thirdly relative, and it is adjacent with second and the 4th, by first summit and the 4th summit connecting line mid point, perpendicular to the trapezoidal faces of air inlet and be parallel to first summit and the circular face of the cross section of the connecting line on second summit and air outlet intersects, and accordingly, aforesaid first and thirdly then all be positioned on this cross section, concrete structure is as follows:

The circular arc of first and second formation converges on first summit gradually glossily, first circular arc with the 4th formation is smooth gradually converges on the 4th summit, thirdly diffuse to second summit and the 3rd summit respectively to both sides, and form a joint face with second summit and the 3rd summit, then have described snail tongue on this joint face.

Further optimal design, reduce noise, the perisporium of described cross section and described cover body and the trapezoidal faces of air inlet intersect at first intersection point and second intersection point, first point, first intersection point and second intersection point are formed to be the angle on summit with first intersection point, and the angular dimension at this angle satisfies 70 °～90 ° of following scopes.

Reduce manufacturing cost and enhance productivity, cover body adopts plastics, and by the integrated through injection molding moulding.

Compared with prior art, the invention has the advantages that: the design of snail tongue on cover body, can make the spiral case air-out port that is connected with outlet housing need not to design the snail tongue in addition, simplify the structure, and, cover body can adopt plastic material, the snail tongue of cover body can pass through the integrated through injection molding moulding, because of the general metal material that adopts in the spiral case, than the moulding expense in spiral case, manufacturing cost reduces greatly, and production efficiency also improves greatly simultaneously; By optimal design to the cover body perisporium, utilize the snail tongue to realize active noise reduction function, noise obviously reduces.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of embodiment.

Fig. 2 is the upward view of embodiment.

Fig. 3 looks up perspective view for embodiment.

Fig. 4 is the embodiment front schematic view.

Fig. 5 is the embodiment cutaway view.

Fig. 6 is the rough schematic view of Fig. 5.

Fig. 7 is an embodiment application state schematic diagram.

The specific embodiment

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

Embodiment: with reference to illustrated in figures 1 and 2, ventilator air outlet cover comprises cover body 2 and non-return valve block (do not have among the figure and show), this cover body 2 has a trapezoidal air inlet 4 and a circular air outlet 3, non-return valve block then is located at air outlet 3, air outlet 3 is provided with circular adpting flange 9, and air inlet 4 is provided with the adpting flange 8 of rectangle.The perisporium of cover body 2 is a shiny surface, and its perisporium has extended upward a snail tongue 5 by air inlet 4.

With reference to shown in Figure 3, air inlet 4 is a trapezoidal faces, the first summit B is arranged on this trapezoidal faces, the second summit C, the 3rd summit D and the 4th summit A, wherein, the first summit B is relative with the 3rd summit D and adjacent with the 4th summit A with the second summit C, the first summit B is parallel with the connecting line AB of the 4th summit A with the 3rd summit D with the connecting line BC of the second summit C, accordingly, air outlet 3 is a circular face, be evenly equipped with first F on the circumference of this circular face, second G, thirdly H and the 4th E, wherein first F is with thirdly H is relative, and it is adjacent with the 4th E with second G, by the first summit B and the 4th summit A connecting line AB mid point, perpendicular to the trapezoidal faces of air inlet 4 and be parallel to the first summit B and the circular face of the cross section of the connecting line BC of the second summit C and air outlet 3 intersects, accordingly first F and thirdly H then all be positioned on this cross section, trapezoidal faces in the present embodiment is a right-angled trapezium, and ∠ ABC is the right angle, and concrete structure is as follows:

The circular arc of first F and second G formation converges on the first summit B gradually glossily, the circular arc that first F and the 4th E form is smooth gradually converges on the 4th summit A, thirdly H diffuses to the second summit C and the 3rd summit D respectively to both sides, and form a joint face with the second summit C and the 3rd summit D, then have described snail tongue 5 on this joint face.For ease of understanding, with reference to shown in Figure 4, circular arc A ' B ' expands r ' to the radius of curvature of circular arc C ' D ' to gradually by r, is one and becomes R snail tongue 5.

With reference to figure 5 and shown in Figure 6, the trapezoidal faces of the perisporium of cross section and cover body 2 and air inlet 4 intersects at the first intersection point N and the second intersection point M, first F, the first intersection point N and the formed angle ∠ FMN of second intersection point M size satisfy 70 °～90 ° of following scopes, and the best is 80 °.

Fig. 7 is the user mode reference diagram of embodiment, as shown in the figure, inlet box 101, outlet housing 100, exhaust fume collecting hood 10322, spiral case 102 is arranged, and the air outlet of spiral case 102 is connected with the air inlet of outlet housing 100.

Cover body 2 in the present embodiment adopts plastics, and by the integrated through injection molding moulding.

Well-designed by to cover body 2 perisporiums utilizes snail tongue 5 to realize active noise reduction functions, and noise obviously reduces.Smooth cover body 2 can adopt the integrated through injection molding moulding, and is with low cost, the production efficiency height; Because outlet housing 100 has had good noise reduction, the air-out port of the spiral case 102 that is attached thereto can be simplified setting, has reduced the integral body material of outlet housing 100 with spiral case 102, has saved manufacturing cost.

Claims

1. ventilator air outlet cover with active noise reduction function, comprise cover body (2), the air inlet (4) that this cover body (2) has an air outlet (3) and is connected with spiral case air-out port, the perisporium that it is characterized in that described cover body (2) is a shiny surface, and its perisporium has extended upward a snail tongue (5) by air inlet (4).

2. the ventilator air outlet cover with active noise reduction function according to claim 1, the radius of curvature that it is characterized in that described snail tongue (5) are and enlarge gradually or dwindle shape.

3. the ventilator air outlet cover with active noise reduction function according to claim 2, it is characterized in that described air inlet (4) is a trapezoidal faces, first summit (B) is arranged on this trapezoidal faces, second summit (C), the 3rd summit (D) and the 4th summit (A), wherein, first summit (B) is relative with the 3rd summit (D) and adjacent with the 4th summit (A) with second summit (C), first summit (B) is parallel with the connecting line of the 4th summit (A) with the 3rd summit (D) with the connecting line of second summit (C), accordingly, described air outlet (3) is a circular face, be evenly equipped with first point (F) on the circumference of this circular face, second point (G), thirdly (H) and the 4th point (E), wherein first point (F) is relative with thirdly (H), and it is adjacent with the 4th point (E) with second point (G), by first summit (B) and the 4th summit (A) connecting line mid point, perpendicular to the trapezoidal faces of air inlet (4) and to be parallel to first summit (B) crossing with the circular face of air outlet (3) with the cross section of the connecting line on second summit (C), aforesaid accordingly first point (F) and thirdly (H) then all be positioned on this cross section, concrete structure is as follows:

The circular arc that first point (F) and second point (G) form converges on first summit (B) gradually glossily, the circular arc that first point (F) and the 4th point (E) form is smooth gradually converges on the 4th summit (A), thirdly (H) diffuses to second summit (C) and the 3rd summit (D) respectively to both sides, and form a joint face with second summit (C) and the 3rd summit (D), then have described snail tongue (5) on this joint face.

4. the ventilator air outlet cover with active noise reduction function according to claim 3, it is characterized in that the perisporium of described cross section and described cover body (2) and the trapezoidal faces of air inlet (4) intersect at first intersection point (N) and second intersection point (M), first point (F), first intersection point (N) and second intersection point (M) are formed to be the angle on summit with first intersection point (N), and the angular dimension at this angle satisfies 70 °～90 ° of following scopes.

5. according to the described ventilator air outlet cover of the arbitrary claim of claim 1 to 4, it is characterized in that described cover body (2) adopts plastics with active noise reduction function, and by the integrated through injection molding moulding.