CN103334957A

CN103334957A - Air passage for cross-flow fan

Info

Publication number: CN103334957A
Application number: CN2013103191720A
Authority: CN
Inventors: 向运明
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-28
Filing date: 2013-07-28
Publication date: 2013-10-02

Abstract

The invention relates to an air passage for a cross-flow fan. The air passage comprises a volute casing (2), a volute bolt (3) and the like. In order to obtain the satisfactory air quantity noise characteristics, the air outlet opening section of the volute bolt is in an inwards recessed state, so higher flow speed can be obtained in the region C of the volute bolt when the cross-flow fan works, a low-pressure region is formed, the air backflow of the region B of the volute bolt is reduced, the efficiency is improved, the air quantity is improved, and the noise is reduced.

Description

A kind of air channel of cross flow fan

Technical field

The present invention relates to a kind of cross flow fan air channel, can promote efficient, increase air quantity, reduce noise, belong to blower fan air channel technical field.

Background technique

Along with the raising of quality of the life, equipment such as air-conditioning, air curtain are used and are increased gradually, and travelling comfort and environmental requirement are also more and more higher, and the air channel design of cross flow fan is also had higher requirement.There is the shortcoming that air quantity is lower, efficient is lower, noise is bigger in present cross flow fan ducting system.

Summary of the invention

The present invention is directed to the deficiencies in the prior art, adopt newly-designed cross flow fan ducting system.

The ducting system of cross flow fan of the present invention, as shown in Figure 1, comprise cross flow fan (1), air-duct spiral case (2), snail tongue (3) etc., if cross flow fan (1) center is P to the distance of spiral case (2), the closest approach of spiral case is arrived at the A point in the cross flow fan center, light from A, along the cross flow fan sense of rotation, the P value trends towards increasing gradually; Snail tongue (3) is made as l in the length of exhaust outlet section, and the snail tongue has indent in the ducting outlet section, and the indent highest point is made as D, and the D point is made as t to the distance of snail tongue exhaust outlet starting point E, then t＜0.6l; Snail tongue indent length is made as m, and distance is made as k, then k＜0.3l to snail tongue indent starting point F to snail tongue exhaust outlet section starting point E along snail tongue length direction.After the snail tongue indent, will obtain higher flow velocity in the C zone of snail tongue, so the static pressure in C zone will be lower, air-flow trends towards flowing to the C zone of low pressure, reduces air-flow and refluxes to the B zone, improves the efficient of cross flow fan system, improves air quantity, reduces noise.

According to above-mentioned air channel, snail tongue exhaust outlet segment length starting point E is to the distance and satisfied (the k+m)/l=0.2 of the relation of snail tongue length l ~ 1.0 of snail tongue concave section terminal point G.

According to above-mentioned air channel, establishing snail tongue (3) indent height maximum value is n, and then the relation of indent height n and snail tongue indent length m satisfies n＜0.3m.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the example in the air channel of cross flow fan of the present invention.

Fig. 2 is the embodiment that cross flow fan of the present invention air channel is used for wall hanging type air conditioner indoor unit.

1. cross flow fans among the figure, 2. spiral case, 3. snail tongue, 4. heat exchanger.

Embodiment

Present embodiment is that the present invention is used for wall hanging type air conditioner indoor unit, as shown in Figure 2, snail tongue indent length is 69mm, the indent maximum height is 7mm, the indent maximum height is put snail tongue wind outlet section start point distance from being 39mm, the distance of snail tongue indent starting point to snail tongue wind outlet section starting point along snail tongue length direction is 6mm, and snail tongue wind outlet section length is 89mm.Behind the fan operation, air enters air-conditioning inside, flows through heat exchanger (4), enters cross flow fan, flows out from air-conditioner air outlet then.

Claims

1. the air channel of a cross flow fan, comprise air-duct spiral case (2), snail tongue (3) etc., it is characterized in that: establishing cross flow fan (1) center is P to the distance of spiral case (2), the closest approach of spiral case is arrived at the A point in the cross flow fan center, light from A, along the cross flow fan sense of rotation, the P value trends towards increasing gradually; Snail tongue (3) is made as l in the length of exhaust outlet section, and the snail tongue has indent in the ducting outlet section, and the indent highest point is made as D, and the D point is made as t to the distance of snail tongue exhaust outlet starting point E, then t＜0.6l; Snail tongue indent length is made as m, and distance is made as k, then k＜0.3l to snail tongue indent starting point F to snail tongue exhaust outlet starting point E along snail tongue length direction.

2. according to the described air channel of claim 1, it is characterized in that (k+m)/l=0.2 ~ 1.0.

3. according to claim 1 or 2 described air channels, establishing snail tongue (3) indent height maximum value is n, it is characterized in that n＜0.3m.