CN1334409A

CN1334409A - Cross flow fan

Info

Publication number: CN1334409A
Application number: CN01123397A
Authority: CN
Inventors: 横内朗; 伊东正太郎; 三谷重信
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2000-07-19
Filing date: 2001-06-28
Publication date: 2002-02-06
Anticipated expiration: 2021-06-28
Also published as: JP3695294B2; CN1243917C; KR100427150B1; JP2002031080A; CN2498375Y; MY130707A; KR20020007991A

Abstract

The invention provides a cross-flow fan connect with a plurality of fan blades in the axial direction, dispose with an end plate on both ends. The fan blades are formed by extending a plurality of blade pieces in a cylindrical shape from an annular base plate, and the ring plate for connecting the blade pieces to an inner circumferential part of the blade pieces is extended in an annular or disk-shaped manner, and integrated therewith. By this construction, there is no whitening or cracks in a ring plate, and increable in the size.

Description

Cross flow fan

The present invention relates to be used in the structure of the cross flow fan in domestic air conditioner etc.

For the indoor set of wall hanged type domestic air conditioner, be widely used as its cross flow fan of blowing means.For example, known have an existing apparatus shown in Figure 5.

In Fig. 5, indoor set 100 is made of heat exchanger 101, cross flow fan 102, fan hub 103, outer cover 104 and grid 105 etc.Blower fan 102 is arranged in the shell 103, the downstream of heat exchanger 101.This blower fan 102 rotatably is supported on the axle under the situation of guaranteeing the back side spacing y2 of regulation between itself and the shell 103.Drive blower fan 102 rotations by the motor (not shown).

In addition, indoor set 100 is by forming known freeze cycle with the wiring of outdoor unit (not shown) pipe arrangement.Refrigeration agent in the heat exchanger 101 is supplied with by outdoor unit.When blower fan 102 rotation, from indoor air of coming in by heat exchanger 101 coolings, become cold wind and send from blowing mouth 106.

The typical structure that is used in this blower fan 102 in the air conditioner for example discloses roughly the same therewith structure as shown in Figure 6 and Figure 7 in No. 2039701 communiques of Japan Patent and the flat 9-317691 communique of Te Kai.Shown in two figure, above-mentioned blower fan 102 is made of a plurality of wind feeding blades 110, first end plate 111 and second end plate 112.These wind feeding blades 110, end plate 111 and end plate 112 are respectively by behind the resin injection mould-forming, and the joint butt joint with mutual couples together them by ultrasonic welding, and blower fan 102 has just completed like this.

Here, each wind feeding blades 110 extends a plurality of fins 114 cylindricly and forms by being from annular base plate 113.In addition, the peripheral part setting in the end 115 of fin 114 makes each fin 114 interconnective ring flat-plate 116.

This ring flat-plate 116 is for the horizontal dimension precision of guaranteeing part in the wind feeding blades 110 and intensity, prevents that fin 116 circumferencial direction dislocation, radial dilatation are provided with when ultrasonic welding is pressurizeed.The width L10 of ring flat-plate is set at air quantity performance (air quantity and noise) is produced about the 2mm of minimum influence.

From factors such as the miniaturization of air conditioner and power savings, the cross flow fan that requires to be used in the indoor set of domestic air conditioner has better air quantity performance (air quantity, noise).Otherwise, just have the tendency that rotating speed rises or the rotating speed amplitude broadens.For this reason, should make the fin attenuation, ensure the intensity of wind feeding blades self by the mixed volume that in resin material, increases glass fibre and carbon fiber.

In addition,, increase the air quantity of indoor set for power saving, just must make the big shapeization of cross flow fan, and consider that from the intensity of wind feeding blades big shapeization is restricted again particularly in recent years.

That is, in the structure of the cross flow fan of prior art domestic air conditioner, the thickness L11 that is located at the ring flat-plate 116 at wing tip 115 places specially is about 1mm, and width L10 is about 2mm, and ring flat-plate 116 is about 1mm with the size L12 of fin 114 connecting parts.For this reason, during the resin injection mould-forming of wind feeding blades 110, resin flow during owing to injection moulding joint can occur at each intermediate portion 116a (see figure 7) place of ring flat-plate 116, and intensity is weakened.Like this, when wind feeding blades 110 being docked mutually and implement ultrasonic welding, albefaction and crack can appear in the connecting part of this joint part and wing tip and ring flat-plate, owing to this reason, during fan 102 rotations, anomalies such as unusual sound equipment and breakage will occur.But, increase ring flat-plate 116 size everywhere again owing to the decline of air quantity performance (air quantity, noise) is difficult to carry out.

Because clearance distance y2 shown in Figure 5 is generally about 3mm, particularly, the thickness L11 that increases ring flat-plate 116 can make the air quantity performance descend significantly, in addition, contact problem such as shell 103 with blower fan 102 and also makes this size be difficult to minimizing owing to sibilant rale occurs.In addition, above-mentioned width L10 and connecting part size L12 are increased, also the reduction owing to the air quantity performance is difficult to realize.

For addressing the above problem, the purpose of this invention is to provide a kind of cross flow fan, be arranged on the structure of the stiffening plate on the wind feeding blades wing tip, make in this stiffening plate part albefaction and crack can not occur by change, prevent unusual sound equipment and breakage, thereby realize the maximization of fan.

Cross flow fan of the present invention has following structure.

Promptly, cross flow fan of the present invention by the wind feeding blades of axial connection, be arranged on axial two ends end plate integrally formed, the stiffening plate that wind feeding blades comprises the ring-type substrate, is cylindric extended a plurality of fins, the interior perimembranous of above-mentioned each fin is connected with each other from above-mentioned ring-type substrate.

Owing to adopt such structure, make stiffening plate be arranged in the interior perimembranous of each fin, the required size of its thickness can freely be set, and therefore can guarantee that stiffening plate has enough intensity, realizes the maximization of cross flow fan.In addition since stiffening plate the peripheral part of airfoil is outstanding, therefore just can make the diameter increase of fan, further improve its air quantity performance.

Fig. 1 is the decomposition profile diagram of the cross flow fan of first embodiment of the invention;

Fig. 2 is the stereogram of the wind feeding blades of expression cross flow fan shown in Figure 1;

Fig. 3 is the decomposition profile diagram of the cross flow fan of second embodiment of the invention;

Fig. 4 is the decomposition profile diagram of the cross flow fan of third embodiment of the invention;

Fig. 5 is the internal structural map of the indoor set of the expression domestic air conditioner that uses cross flow fan;

Fig. 6 is the decomposition profile diagram of cross flow fan in the prior art;

Fig. 7 is the stereogram of the wind feeding blades of expression cross flow fan shown in Figure 6.

Embodiments of the invention are described below with reference to accompanying drawings.

In addition, formation, function, the effect of the air conditioner of lift-launch cross flow fan of the present invention are the same substantially with prior art, no longer explanation here.

(the 1st embodiment)

Fig. 1 is the decomposition profile diagram of the cross flow fan of first embodiment of the invention, and Fig. 2 is the stereogram of the wind feeding blades of expression cross flow fan shown in Figure 1.

In Fig. 1 and Fig. 2, cross flow fan 1 is made of a plurality of wind feeding blades 2, first end plate 3 and second end plate 4.Each wind feeding blades 2, end plate 3 and end plate 4 are respectively by behind the resin injection mould-forming, and the joint butt joint with mutual couples together them by ultrasonic welding, and blower fan 1 has just completed like this.

One end of each wind feeding blades 2 has annular base plate 5.Be from annular base plate 5 and extend a plurality of fins 6 cylindricly.Joint 7 places in week in fin 6 are provided with and make each fin 6 interconnective stiffening plate, are ring flat-plate 8.This ring flat-plate 8 is integrally formed with guiding teat 82.The outer circumferential face of this teat 82 becomes when being welded to connect the guide surface 81 as guiding usefulness.

Ring flat-plate 8 is for the horizontal accuracy of guaranteeing part in the wind feeding blades 2 and intensity, prevents that fin 6 circumferencial direction dislocation, radial dilatation are provided with when ultrasonic welding is pressurizeed.The width L1 of ring flat-plate 8 is set at air quantity performance (air quantity and noise) is produced about the 2mm of minimum influence.In addition, the size L2 of ring flat-

plate

8 and 6 connecting parts of each fin is set at about 1mm.

In addition, the section of each fin 6 is wing, and 7 sides form welding protuberance 61 in the connecting part, forms welding recess 52 in substrate 5 sides.

In addition, discoideus end plate 3 has and is positioned at the axle (not shown) that its axis central part is used for making motor and inserts fixing flange 31, be used for injecting the guiding protuberance 33 that the welding recess 32 and being used for of the welding protuberance 61 of each fin 6 leads when assembling.

In addition, the discoideus end plate 4 that is arranged in blower fan 1 the other end place relative with end plate 3 is formed with: be arranged in axle 41 that its axis central part is inserted in the bearing (not shown), be used for inserting the welding recess 52 of substrate 5 welding protuberance 42, be used for the guiding protuberance 43 that when assembling, leads.

The following describes the assembling method of each wind feeding blades 2, end plate 3 and end plate 4.

At first end plate 3 and a wind feeding blades 2 are coupled together.At this moment, the outer circumferential face 81 of the ring flat-plate 8 of wind feeding blades 2 is inserted in the inner peripheral surface 34 of guiding recess 33 of end plates 3.Afterwards, the welding protuberance 61 of each fin 6 is embedded in the welding recess 32 of end plates 3, finish the preparatory work of connection.

Then, with ultrasonic welding each fin 6 and end plate 3 are linked into an integrated entity.Here, the ultrasonic welding connection technology that utilizes ultrasonic energy to carry out has become known, no longer explanation.

After this, a wind feeding blades 2 that is connected on the end plate 3 is coupled together with other same wind feeding blades 2 (a plurality of).This connecting means is identical with the connecting means of wind feeding blades 2 with end plate 3.Afterwards, repeatable operation couples together a plurality of wind feeding blades 2 after the same method.

At last, end plate 4 is installed on the above-mentioned connecting body, finishes blower fan 1.This connecting means is also identical with the above-mentioned connecting means of wind feeding blades 2 with end plate 3.

By above-mentioned formation, because ring flat-plate 8 is arranged in interior all sides of each fin 6, the essential size of its thickness L3 can freely be set, and therefore can guarantee that ring flat-plate 8 has enough intensity.Like this, the part (be equivalent to shown in Figure 7 part 116a) of ring flat-plate 8 between each fin joint and albinism can not occur.In addition, can also prevent circumferencial direction dislocation, the radial dilatation of each fin 6 of 7 places in the connecting part.

In addition, different with existing example shown in Figure 6, in the first embodiment of the present invention, because the peripheral part of airfoil 6 is not outstanding as the ring flat-plate 8 of stiffening plate, its size does not hinder the diameter of fan to become big, therefore can improve the air quantity performance.

In addition, on above-mentioned ring flat-plate 8, be provided with than each fin top guiding protuberance 82 outstanding, be connected usefulness with each wind feeding blades 2.So just make between the wind feeding blades 2 and wind feeding blades 2 and each end plate 3,4 between the precision that is connected improve.

Moreover, owing to arranged reinforcing chip R at each fin 6 that extends to form from substrate 5 and the connecting part 7 that is arranged on the ring flat-plate 8 of perimembranous in each fin, therefore formed can proof strength wind feeding blades 2.

(the 2nd embodiment)

Fig. 3 is the decomposition profile diagram of the cross flow fan of second embodiment of the invention.

Second embodiment and first embodiment's difference have following some.That is, as shown in Figure 3, each fin 6 is formed with from each fin 6 position of stiffening plate 8 and annular base plate 5 is oppositely extended, be of a size of L4 second fin 60 is set.Adopt this structure, can guarantee the intensity of long wind feeding blades 2.Making cross flow fan 4 become big size L4 suitably determines according to employed resin material, rotational speed welding operation etc.

(the 2nd embodiment)

We believe that second embodiment has identical effect with first embodiment.

Fig. 4 is the decomposition profile diagram of the cross flow fan of third embodiment of the invention.

In above-mentioned first embodiment, welding recess 52 is set on substrate 5, welding protuberance 61 is set on fin 6, and in the 3rd embodiment, does not design the two.Here, as shown in Figure 4, wind feeding blades 2 interconnect and wind feeding blades 2 was finished with being connected by direct welding of each end plate 3,4.

We believe that the 3rd embodiment also has identical effect with first embodiment.

In addition, in the above-described embodiments, connecting means is illustrated, also can uses bonding other connecting means that waits to be welded as example.

In addition, ring flat-plate shown in Figure 1 (stiffening plate) 8 has opening 83, and in Fig. 3, Fig. 4, although this open part is the circular plate type or the thin slice shape partly of filling up, they have same effect.

Claims

1. cross flow fan, it is by the wind feeding blades (2) of axial connection and be arranged on the end plate (3 at axial two ends, 4) integrally formed, wherein, above-mentioned wind feeding blades (2) stiffening plate (8) that comprises ring-type substrate (5), be cylindric extended a plurality of first fins (6), the interior perimembranous of above-mentioned each fin (6) is connected with each other from above-mentioned ring-type substrate (5).

2. cross flow fan as claimed in claim 1, wherein, above-mentioned stiffening plate (8) is a ring-type and discoideus a kind of.

3. cross flow fan as claimed in claim 1, wherein, above-mentioned stiffening plate (8) is arranged on the flap end portion with above-mentioned ring-type substrate (5) opposite side, and has with each wind feeding blades (2) and be used for the direction protrusion (82) that leads when being connected.

4. cross flow fan as claimed in claim 1 wherein, is provided with reinforcing chip (R) at the joint (7) of above-mentioned each fin (6) and above-mentioned stiffening plate (8).

5. cross flow fan as claimed in claim 1, wherein, above-mentioned wind feeding blades (2) have from position that above-mentioned stiffening plate (8) is set towards extend with ring-type substrate (5) opposite direction, with above-mentioned each integrally formed second fin (60) of first fin (6).