CN102454635A

CN102454635A - Cross flow fan

Info

Publication number: CN102454635A
Application number: CN2010105227210A
Authority: CN
Inventors: 黄美玲; 汪洪丹; 刘利娜
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2010-10-26
Filing date: 2010-10-26
Publication date: 2012-05-16

Abstract

The invention discloses a cross flow fan which comprises a volute, wherein a cross flow blade is arranged in the volute, a volute tongue is arranged at an air outlet side of the volute, and the tongue part of the volute tongue partially inclines along a longitudinal direction and forms an included angle of 0 to 89 degrees between a profile of an inclined part and the axial direction of the cross flow blade. With the adoption of the cross flow fan, the noise during running of the fan can be effectively reduced.

Description

Cross flow fan

Technical field

The invention belongs to field of air conditioning, be specifically related to a kind of cross flow fan.

Background technique

Aerodynamic noise when the noise of cross flow fan mainly comes from the blower fan rotation; And aerodynamic noise mainly is owing to the noise of air-flow with object collision generation on every side, and in existing air conditioner design, the space between through-flow fan blade and the snail tongue is less; Minimum clearance is in 3-5mm; The more little noiseproof feature of minimum clearance is poor more unfavorable to Noise Control, and snail tongue longitudinal length direction and through-flow fan blade is axially substantially parallel, and snail tongue surface is smooth structure basically; Rotation aerodynamic noise to cross flow fan is unfavorable, needs to do further to improve.

Summary of the invention

The objective of the invention is to overcome the defective of existing technology, a kind of cross flow fan is provided, the noise when the present invention can effectively reduce fan operation.

Its technological scheme is following.

A kind of cross flow fan comprises spiral case, in spiral case, is provided with through-flow fan blade, is provided with the snail tongue in the air side of spiral case, and the tongue of said snail tongue tilts, and the tongue that makes the snail tongue the profile of inclination place and through-flow fan blade axially between angle to be 1 degree spend to 89.

The technological scheme of the further refinement of aforementioned techniques scheme can be.

Whole section of said tongue longitudinally part tilts, and tongue and the through-flow fan blade angle between axially to be 1 degree spend to 5.

Said tongue longitudinally is divided into multistage, and one of them section tongue longitudinally part tilts, and this tongue is 1 to 10 to spend at the profile of inclination place and the through-flow fan blade angle between axially.

Also be provided with at random or equally distributed jog array on the tongue surface of said snail tongue.Said jog array is the geometrical shape with concaveconvex structure, and like quadrilateral, circle or triangle, it is arranged can be evenly to arrange, and also can be random arrangement, and its preferred structure can be following two kinds.

1, said jog array is a round.

Further, said round is at least two rows, and each hole in adjacent two row's rounds is interlaced.

Further, to second end, the aperture of said round dwindles gradually from first end of said tongue.

Further, to second end, the hole depth of said round is dwindled gradually from first end of said tongue.

Further, said round second end ends at position between the tongue stage casing and second end.

2, said jog array is a spaced teeth.

Further, said spaced teeth is the rectangle helical teeth.

Further, to second end, the tooth depth of said spaced teeth reduces gradually from first end of said tongue.

First end according to the invention, second end only are relative position relations, do not refer in particular to a certain end.

In sum, advantage of the present invention is.

1, changed in the conventional construction owing to the present invention; The defective that the gap immobilizes and brought between the tongue of snail tongue and the through-flow fan blade; The tongue of snail tongue and the gap between the through-flow fan blade are changed; Improve through-flow fan blade and respectively save the bump degree between the air-flow and snail tongue in the rotary course, reduced noise.

2, the tongue at the snail tongue also is provided with jog array (being that tongue no longer seamlessly transits); Tongue is changed at the snail tongue room of its length direction; Weaken the fluctuation intensity of air-flow, the noise when further having reduced the through-flow fan blade operation at the tongue bump of snail tongue.

Description of drawings

Fig. 1 is in the embodiment of the invention, the axial end portion view of cross flow fan.

Fig. 2 is in the embodiment of the invention, the schematic representation in gap between the tongue of through-flow fan blade and snail tongue.

Fig. 3 is in the embodiment of the invention one, the front view of snail tongue.

Fig. 4 is the cross-section profile of the said snail tongue of Fig. 3.

Fig. 5 is in the embodiment of the invention two, the front view of snail tongue.

Fig. 6 is the cross-section profile of the said snail tongue of Fig. 7.

Comparison diagram when Fig. 7 is the embodiment of the invention one and the operation of existing through-flow fan blade.

Comparison diagram when Fig. 8 is the embodiment of the invention one and the operation of existing through-flow fan blade.

Description of reference numerals: 1, spiral case, 2, through-flow fan blade, 3, the snail tongue, 4, tongue, 5, spaced teeth, 6, round.

Embodiment

Below in conjunction with accompanying drawing embodiments of the invention are elaborated.

Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, this is the structural drawing of embodiment's one said cross flow fan, and it comprises spiral case 1; In spiral case 1, be provided with through-flow fan blade 2; Be provided with snail tongue 3 in the air side of spiral case 1, the tongue 4 of said snail tongue 3 longitudinally tilts, and make snail tongue 3 tongue 4 profile and through-flow fan blade 2 axially between angle be that 1 degree to 10 degree are (in the present embodiment; Angle & is as shown in the figure, and its angle is 2 degree).

Wherein, also be provided with the jog array that is used to change snail tongue 3 spacings on tongue 4 surfaces of said snail tongue 3, in the present embodiment; Said jog array is a round 6; This round 6 is four rows, and each hole in adjacent two row's rounds 6 is interlaced, and promptly first row aligns with the 3rd row; Second row and the 4th arranges and aligns, and second row, the 4th row arrange staggered with first row, the 3rd.To second end, the aperture of said round 6 dwindles gradually from first end of said tongue 4, and its hole depth is also dwindled gradually, and round 6 second ends end at position between tongue 4 stage casings and second end.

In sum, the advantage of present embodiment is.

1, changed in the conventional construction owing to present embodiment; The defective that the gap immobilizes and brought between the tongue 4 of snail tongue 3 and the through-flow fan blade 2; The tongue 4 of snail tongue 3 and the gap between the through-flow fan blade 2 are changed; Improve through-flow fan blade 2 and respectively save the bump degree between the air-flow and snail tongue 3 in the rotary course, reduced noise.

2, the tongue 4 at snail tongue 3 also is provided with jog array (being that tongue 4 no longer seamlessly transits); Tongue 4 is changed in snail tongue 3 gaps of its length direction; Weaken the fluctuation intensity of air-flow, the noise when further having reduced through-flow fan blade 2 operations at tongue 4 bumps of snail tongue 3.

The noise contrast situation of present embodiment and existing cross flow fan (being former machine) is asked for an interview Fig. 7, can find out, present embodiment can realize that air quantity has improved about 30m3/h, and noise peak has reduced the 2-3 decibel under the equal air quantity.

Like Fig. 5, shown in Figure 6, be structure shown in the embodiment of the invention two, in the present embodiment, said jog array is a spaced teeth 5, and further, said spaced teeth 5 is the rectangle helical teeth, and to second end, the tooth depth of said spaced teeth 5 reduces gradually from first end of said tongue 4.The principle of present embodiment is identical with embodiment one, and the noise contrast situation of present embodiment and existing cross flow fan is asked for an interview Fig. 8, can find out, present embodiment can realize that air quantity has improved about 40m3/h, and noise peak has reduced the 1.5-2 decibel under the equal air quantity.

Embodiment three, and in the present embodiment, said tongue 4 longitudinally is divided into multistage, and wherein one section for example is a section of middle part, and tongue 4 longitudinally part tilts, and the profile of this tongue 4 and through-flow fan blade 2 angle between axially is 8 to spend.

More than be merely specific embodiment of the present invention, do not limit protection scope of the present invention with this; Any replacement and the improvement on the basis of not violating the present invention's design, done all belong to protection scope of the present invention.

Claims

1. a cross flow fan comprises spiral case, in spiral case, is provided with through-flow fan blade; Be provided with the snail tongue in the air side of spiral case; It is characterized in that the tongue of said snail tongue longitudinally part tilts, said tongue the profile of inclination place and through-flow fan blade axially between angle to be 0 degree spend to 89.

2. cross flow fan according to claim 1 is characterized in that, whole section of said tongue longitudinally part tilts, and tongue and the through-flow fan blade angle between axially to be 1 degree spend to 5.

3. cross flow fan according to claim 1 is characterized in that said tongue longitudinally is divided into multistage, and one of them section tongue longitudinally part tilts, and this tongue is 1 to 10 to spend at the profile of inclination place and the through-flow fan blade angle between axially.

4. like each said cross flow fan in the claim 1 to 3, it is characterized in that, also be provided with at random or equally distributed jog array on the tongue surface of said snail tongue.

5. like the said cross flow fan of claim 4, it is characterized in that said jog array is a round.

6. like the said cross flow fan of claim 5, it is characterized in that said round is at least two rows, and each hole in adjacent two row's rounds is interlaced.

7. like the said cross flow fan of claim 5, it is characterized in that to second end, the aperture of said round dwindles gradually from first end of said tongue.

8. like the said cross flow fan of claim 5, it is characterized in that to second end, the hole depth of said round is dwindled gradually from first end of said tongue.

9. like the said cross flow fan of claim 4, it is characterized in that said jog array is a spaced teeth.

10. like the said cross flow fan of claim 9, it is characterized in that said spaced teeth is the rectangle helical teeth.

11., it is characterized in that to second end, the tooth depth of said spaced teeth reduces gradually from first end of said tongue like the said cross flow fan of claim 10.