CN100398842C

CN100398842C - Spiral blast fan device

Info

Publication number: CN100398842C
Application number: CNB2003101067867A
Authority: CN
Inventors: 孫永福; 任庆錫; 金政勳; 黄成万; 李广源
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2003-10-30
Filing date: 2003-10-30
Publication date: 2008-07-02
Anticipated expiration: 2023-10-30
Also published as: CN1611798A

Abstract

The present invention provides a spiral blast fan device which mainly comprises a rotating shaft combined with a drive motor, wherein the rotating shaft is fixed on a long cylinder-shaped sleeve barrel, spiral blades are spirally arranged on the outer surface of the sleeve barrel from one end of the sleeve barrel to the other end along the direction of the rotating shaft, the outer side of the blades is provided with a hollow cylindrical fan casing whose both ends are provided with openings, and one of the two end parts of each opening, which is used for sucking air, is expanded toward outer side along a radius. The tail end parts of the fan casing, which are used for sucking and discharging air, are respectively expanded outwards along the radius direction. The present invention has the effect that suction quantity and discharge pressure cam also be increased under the condition that the spiral blades of the spiral blast fan device are not enlarged, and thereby, high air quantity and high air pressure can be obtained. Because air flows along an axial direction, the air in the system is free from the limitation of the position of the blast fan; thereby, the system can be reduced.

Description

The Screw fan device

Technical field

The present invention is the structure of relevant blowing fan, particularly about in the household appliances that are arranged at air conditioner etc. or other manufacturing equipments make air axially the energy of flow obtain the Screw fan device of high air quantity and high blast.

Background technique

In general, in such household appliances of air conditioner or air exchange system, be provided with the blowing fan of many kinds of forced air supply air at factory installation.The blowing fan of many kinds is like this divided into according to the flow characteristic of its wind pushing air: axial flow type blowing fan and center of circle type blowing fan.

The axial flow type blowing fan is the blowing fan parallel with running shaft that flow of air, and this kind fan has the big but less relatively characteristic of pressure of generation of the wind flow of generation.Though and to flow be the running shaft direction in the ingress of the common blade of center of circle type blowing fan, but the outlet port flow direction is perpendicular to the radial direction of running shaft.Though such center of circle type blowing fan because the flow that center of circle power produces is little, still has the characteristic that produces big blast.

Therefore, in the system of blowing fan was installed, the characteristic separately that will consider above-mentioned several blowing fans was fully selected the blowing fan that is suitable for.For example, therefore the outdoor unit of air conditioner because of need using center of circle type blowing fans such as leafy chip or turbo type to be the master than higher blast.Otherwise, more need the indoor set of the air conditioner of high air quantity will be suitable for the axial flow type blowing fan compared with high blast.Because in air exchange system, its topmost purpose is the air that gives off at short notice as much as possible, therefore uses the axial flow type blowing fan that can embody high air quantity.

As if yet many blowing fans are in sum thought simultaneously air quantity and blast all to be promoted up, relatively more difficult.So, if think to improve simultaneously air quantity and blast, will structurally change, promptly increase its volume size.Like this size of fan is strengthened, then be embodied on the household appliances, make the overall volume of its product will become big accordingly.

And, be under the situation of center of circle type blowing fan, when the problems referred to above occurring, the air flows problem different with the direction of outlet port air flows in ingress also can appear, therefore when being set in system, the mounting point of fan is very restricted.

In a word, general many blowing fans in the past are under the situation of contrary direction rotation, and air quantity will obviously reduce or almost not have air quantity.Therefore, generally can only postive direction rotate, and can't contrary direction rotation.Thereby the function of not too easy flexible transformation system.

Summary of the invention

In order to solve the above problems, it is parallel with axle direction to the purpose of this invention is to provide the flow direction that makes air, and increases intake, adopts small volume that the Screw fan device of high air quantity and high blast also can be provided simultaneously.

In order to achieve the above object, the technical solution used in the present invention provides a kind of Screw fan device, its structure mainly includes the running shaft that is combined on the drive motor, running shaft is fixed on the oval cylindrical sleeve, wherein: at least one blade that on the outer circumferential face of sleeve, spirals and be provided with the screw type shape along the running shaft direction from the end to end of sleeve, its angle of swing is 180 degree-360 degree, be provided with the fan drum of both ends open hollow circle tube in the outside of blade, and the two end part of opening are provided with the enlarged portion of expanding laterally along radius.

The suction side terminal part of described sleeve and blade protrudes in the terminal part outside, suction side of fan drum.

Effect of the present invention be this Screw fan device under the situation of the size that need not increase the screw type blade, also can increase intake and head pressure, thereby can obtain high air quantity and high blast.Because air is to flow along axle direction, therefore, in system, be subjected to blowing fan that the restriction of position is set hardly, thus whole size that can reduction system.

Description of drawings

Fig. 1 is the stereogram of Screw fan device one example structure of the present invention;

Fig. 2 is the sectional side view of the Screw fan device of Fig. 1;

Fig. 3 is the sectional side view of another example structure of Screw fan device of the present invention.

Among the figure:

11,21: running shaft 12,22: sleeve

13,23: blade 14,24: fan drum

14a, 24a, 24b: enlarged portion

Embodiment

Reaching embodiment in conjunction with the accompanying drawings is described in detail Screw fan device of the present invention.

As depicted in figs. 1 and 2, Screw fan device one embodiment of the present invention, its structure includes: be combined in drive motor (figure does not show) and go up the running shaft 11 that rotates together with the driving of motor, be fixed on the oval cylindrical sleeve 12 on the running shaft 11, on the outer circumferential face of sleeve 12 from its end to end, the blade 13 that spirals and be provided with the screw type shape along the running shaft direction, the suction side terminal part that also has rotating locus arranged outside at blade 13 to have to suck air in the two end part of opening of the fan drum 14 of both ends open hollow cylinder shape and fan drum 14 is expanded laterally and is formed enlarged portion 14a along radius.Therefore, along with the rotation of blade 13, when outside air was drawn into fan drum 14 inside, enlarged portion 14a made suction loss be reduced to minimum, increases intake simultaneously.

Be located on the outer circumferential face of sleeve 12 by 2 blades 13, form, and till from an end of running shaft sleeve 12 to the other end, the angle of spiraling of per 1 blade just in time is 180 degree with of the phase differences dislocation of identical form with 180 degree.

In the middle of the embodiment of above-mentioned Screw fan device, the angle of spiraling of blade 13 is 180 degree.But have more than and be confined to that this is a kind of, the angle of spiraling also can be that 270 degree or 360 degree etc. are arbitrarily angled.

In the middle of the embodiment of above-mentioned Screw fan device, the number of blade is 2.But have more than and be confined to that this is a kind of, the blade number can be provided with 1, also can be provided with as required more than 3 or 3.

In the blade 13 of above-mentioned Screw fan, be made as blade 13 width to the distance blade 13 edges from the outer circumferential face of sleeve 12.Blade 13 width preferably are arranged to along axle direction constant.

The above-mentioned embodiment that blade 13 is spiraled and chats after the setting of angle, number, width still is applicable to.

The Screw fan device of the present invention that is made of said structure is the following work of carrying out.

Running shaft 11 begins rotation toward a certain direction to drive motor (figure does not show) when driving, and the sleeve 12 and the screw type blade 13 that are combined on the running shaft 11 will together rotate.Because of screw type blade 13 forms with the screw type shape along axle direction, so because the rotating force of screw type blade 13, air outside sucks by an end of fan drum 14.At this moment, the end inhaled air by fan drum 14 will advance toward the axle direction spiral along the surface of screw type blade 13, discharges by the other end of fan drum 14 then.

At this moment, because the rotation of blade 13 when outside air is drawn into said fans shell 14 inside, because the suction side of fan drum 14 is formed with the enlarged portion 14a of expansion laterally, so can make suction loss be reduced to minimum, can increase intake simultaneously.

The inlet of Screw fan device flows and outlet is flowed is axially.That is the flow characteristic that, possesses the axial flow type fan.Therefore, the size of screw type blade needn't be increased, also high air quantity can be obtained.Simultaneously, because the inlet side flow direction is identical with the outlet side flow direction, therefore compared with the blowing fan of other types, it is little relatively in internal system locational restriction to be set.

In addition, Fig. 3 is the sectional side view of another example structure of Screw fan device of the present invention.In this embodiment's Screw fan device, the two end part of the cylindrical shape fan drum 24 of hollow are formed with the enlarged portion 24a to the expansion of the radial direction outside, 24b separately.And the suction side terminal part of sleeve 12 and blade 13 is exposed to the enlarged portion 24a outside, suction side of fan drum 24, can further improve intake.

Claims

1. Screw fan device, its structure mainly includes the running shaft that is combined on the drive motor, running shaft is fixed on the oval cylindrical sleeve, it is characterized in that: spiraling along running shaft (11) direction from the end to end of sleeve on the outer circumferential face of sleeve (12) is provided with spiral-shaped at least one blade (13), its angle of swing is 180 degree-360 degree, be provided with the fan drum (14) of both ends open hollow circle tube in the outside of blade (13), and the two end part of opening are provided with the enlarged portion of expanding laterally along radius, and the suction side terminal part of sleeve (12) and blade (13) is exposed to the outside of the suction side enlarged portion of fan drum.