CN103573707B

CN103573707B - Spiral casing

Info

Publication number: CN103573707B
Application number: CN201210248454.1A
Authority: CN
Inventors: 苏起钦; 张宝生; 王成; 刘玉杰; 蔡勃; 戴永福
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2016-08-31
Anticipated expiration: 2032-07-18
Also published as: CN103573707A

Abstract

The invention provides a volute, wherein the molded line of an inner cavity adopts a logarithmic spiral line, and the included angle between the upper sectional line of an air outlet and a horizontal installation line is more than or equal to 5 degrees; therefore, the outlet air can be blown to the middle part of the heat exchanger, so that the heat exchange is uniform, and the overall performance of the product is improved; furthermore, because the included angle between the tangent line of the termination position of the logarithmic spiral line at the lower end of the air outlet and the horizontal installation line is more than or equal to 85 degrees, the cutting effect of the volute tongue on high-speed airflow discharged by the centrifugal fan blade impeller is small, and the noise value is reduced. Meanwhile, the improvement of the volute tongue position of the invention can ensure even airflow during rotary air supply. Compared with the prior art, the air volume of the volute is greatly improved (more than 8%), the air flow is more uniform during rotary air supply, and the noise can be obviously reduced by 2-3 db.

Description

Spiral case

Technical field

The present invention relates to order about ventilation installation's technical field of air flowing, particularly relate to a kind of and centrifugal wind Leaf with the use of spiral case.

Background technology

Spiral case in ventilation installation and centrifugation blade, the inner chamber molded line of its quality, performance and spiral case, phase Coupling centrifugation blade blade profile shape is closely related, and the inner chamber molded line how designing spiral case is most important, preferable The inner chamber Profile Design of the spiral case of scheme, increases the air quantity causing ventilation installation, but level of noise reduces.Mesh The front spiral case mated with centrifugation blade, its inner chamber molded line typically uses gradually opens helix, selects that for intercepting One section spiral line, its parameter thousand differs from hundred different again, causes the uneven of serviceability.At present and centrifugation blade The spiral case of coupling, on air outlet, transversal generally takes 0 degree with being horizontally mounted wire clamp angle, and air-out can not blow to heat exchange In the middle part of device, cause heat exchange uneven；Air outlet lower end is gradually opened the tangent line of the final position of helix and is pacified with level Wiring angle is typically smaller than 85 degree, so the dissection that snail tongue is to the high velocity air that centrifugation blade impeller is discharged By force, big level of noise is produced；The corner of snail tongue position is sharp-pointed, also due to flow-disturbing produces big level of noise.Therefore, Current worm frame so that ventilation installation's air quantity is the most undesirable with level of noise, efficiency is not good enough.

Summary of the invention

The technical problem to be solved is to provide a kind of spiral case, improves the air quantity of ventilation installation, fall Low noise value.

The present invention is achieved through the following technical solutions:

Spiral case, includes air outlet, snail tongue and inner chamber, and snail tongue is positioned at air outlet lower end and inner chamber link position, Wherein, the molded line of described inner chamber uses log spiral；Transversal and the folder being horizontally mounted line on described air outlet Angle is more than or equal to 5 degree.

Wherein in an embodiment, on described air outlet, transversal with the angular range being horizontally mounted line is: 5-30 Degree.

Further, the tangent line of the final position of air outlet lower end log spiral is with to be horizontally mounted wire clamp angle big In equal to 85 degree.

Beneficial effects of the present invention is as follows:

The spiral case of the present invention, owing to the molded line of inner chamber uses log spiral, on air outlet, transversal is pacified with level The angle of wiring is more than or equal to 5 degree；Therefore air-out can blow in the middle part of heat exchanger, causes heat exchange uniform, carries The high overall performance of product；Further, due to the cutting of final position of air outlet lower end log spiral Line is more than or equal to 85 degree with being horizontally mounted wire clamp angle, and snail tongue is cut the high velocity air that centrifugation blade impeller is discharged The effect of cutting is little, reduces level of noise.

Accompanying drawing explanation

Fig. 1 is the molded line structure schematic diagram of spiral case of the present invention；

Fig. 2 is spiral case of the present invention and the air quantity of prior art spiral case, level of noise comparison diagram.

Description of reference numerals:

1, air outlet, 2, inner chamber, 3, snail tongue, 4, be horizontally mounted line, 11, transversal on air outlet, 12, The molded line of inner chamber, 13, transversal under air outlet, 31, arc transition line, 120, air outlet lower end logarithmic spiral The final position of line.

Detailed description of the invention

The present invention is to solve problem of the prior art, it is proposed that a kind of spiral case, such as Fig. 1, include air outlet 1, snail tongue 3 and inner chamber 2, snail tongue 3 is positioned at air outlet 1 lower end and inner chamber 2 link position, wherein, described The molded line 12 of inner chamber uses log spiral；Transversal 11 and the angle being horizontally mounted line 4 on described air outlet More than or equal to 5 degree.

Wherein in an embodiment, transversal 11 and the angular range being horizontally mounted line 4 on described air outlet For: 5-30 degree.

Preferably, on described air outlet, transversal 11 with the angle being horizontally mounted line 4 is: 10 degree.

When air outlet is downward-sloping, wind can blow in the middle part of heat exchanger, makes heat exchange evenly.

Further, the tangent line of the final position 120 of air outlet lower end log spiral be horizontally mounted wire clamp Angle is more than or equal to 85 degree.

Preferably, the tangent line of the final position 120 of described air outlet lower end log spiral be horizontally mounted line 4 Angular range is: 85-120 degree.

Most preferably, the tangent line of the final position 120 of described air outlet lower end log spiral be horizontally mounted line 4 Angle is: 90 degree.

The present invention increases the tangent line of the final position 120 of air outlet lower end log spiral and is horizontally mounted line 4 Angle, to weaken the snail tongue dissection to the high velocity air that impeller is discharged, thus realizes the effect of noise reduction.

The molded line of snail tongue 3 is by the molded line 12 of transversal under air outlet 13, arc transition line 31 and inner chamber successively It is formed by connecting；The tangent line of the final position 120 of transversal 13 and air outlet lower end log spiral under air outlet Angular range is 60～90 degree.

Preferably, the tangent line of the final position 120 of transversal 13 and air outlet lower end log spiral under air outlet Angle be: 72 degree.

The radius R scope of arc transition line 31 is: 5～20mm.

Preferably, the radius R of arc transition line 31 is: 8mm.

The transformation of snail tongue position of the present invention, when rotating air-supply, air-flow is uniform.

And in prior art, most of spiral case inlet pressure are made up of b, d two ends curve, the snail tongue position of prior art The corner put is sharp-pointed, and when rotating air-supply, air-flow is uneven.

Spiral case of the present invention and the air quantity of prior art spiral case, level of noise contrast, as shown in following table and Fig. 2:

The present invention causes at rotation speed of fan identical in the case of even rotating speed is lower, and air quantity is greatly improved (＞ 8%), when rotating air-supply, air-flow is more uniform, can significantly reduce noise 2-3db.

Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended Claim is as the criterion.

Claims

1. spiral case, includes air outlet, snail tongue and inner chamber, and snail tongue is positioned at air outlet lower end and is connected position with inner chamber Putting, the molded line of described inner chamber uses log spiral；Transversal and the angle being horizontally mounted line on described air outlet More than or equal to 5 degree；It is characterized in that, the tangent line of the final position of described air outlet lower end log spiral with Being horizontally mounted wire clamp angle range is: 85-120 degree；The molded line of described snail tongue is by transversal, circular arc mistake under air outlet The molded line of branch-cut bridge and inner chamber is connected in sequence；Transversal and air outlet lower end logarithmic spiral under described air outlet The angle of the tangent line of the final position of line is: 72 degree；The radius R of described arc transition line is: 8mm.

Spiral case the most according to claim 1, it is characterised in that on described air outlet, transversal is pacified with level The angular range of wiring is: 5-30 degree.

Spiral case the most according to claim 2, it is characterised in that on described air outlet, transversal is pacified with level The angle of wiring is: 10 degree.

4. according to the spiral case described in claim 1 or 2 or 3, it is characterised in that described air outlet lower end pair The tangent line of the final position of number helix with being horizontally mounted wire clamp angle is: 90 degree.