CN2370196Y

CN2370196Y - Centrifugal air blower

Info

Publication number: CN2370196Y
Application number: CN 99211167
Authority: CN
Inventors: 黄文喜; 张楯成
Original assignee: Delta Electronics Inc
Current assignee: Taida Electronic Industry Co Ltd; Delta Electronics Inc
Priority date: 1999-05-21
Filing date: 1999-05-21
Publication date: 2000-03-22
Anticipated expiration: 2009-05-21

Abstract

The utility model relates to a centrifugal air blower, which comprises a driving mechanism, an impeller which is driven by the driving mechanism to rotate, a casing, at least one air inlet and at least one air outlet. The casing is provided with a rotation shaft which encircles the impeller in fact, and the casing is provided with an extended axial casing part which is parallel to the rotation shaft of the impeller in fact. The air inlet and the air outlet are arranged on the casing. The utility model is characterized in that at least one air inlet and at least one air outlet are arranged on the axial casing part, and the driving mechanism is accommodated in the impeller. The centrifugal air blower can provide good radiation effect on a machine body which is to radiate heat, such as a thin notebook computer.

Description

Centrifugal fan

The utility model relates to a kind of centrifugal fan, relates in particular to a kind of centrifugal fan that can dwindle thickness and better radiating effect can be provided.

In recent years, notebook computer has become widely used equipment.For keeping the normal operation of notebook computer, must supply with certain air quantity to dispel the heat.Along with the slimming of notebook computer, the thickness of radiation fan also need cooperate the thickness of notebook computer (body of desire heat radiation) and adjust.

With regard to present situation, more and more littler, more and more thinner trend that notebook computer has, and the demand of air quantity is more and more higher.Therefore, in future soon, the blast device of original routine certainly will can't satisfy user's demand.

Figure 1 shows that the stereogram of a kind of centrifugal fan common in the prior art.As shown in Figure 1, blast device 100 comprises a casing 101, an impeller 102 and a driving mechanism (for example motor) 105.For the purpose of explanation, the utility model is divided into the running shaft (not shown) of wound impeller 102 with casing 101 and in fact is parallel to the axial casing 101A of portion that the running shaft of impeller 102 extends, and in fact perpendicular to the side direction casing 101B of portion of above-mentioned running shaft.Blast device 100 also has a wind inlet 103 and an exhaust outlet 104, is opened on the side direction casing 101B of portion.

As shown in Figure 1, both all occupy the axial length of whole blast device 100 driving mechanism 105 and impeller 102, thereby occupy bigger volume, so the blast device of this kind pattern is not applicable in the small-sized desire heat radiation body of notebook computer for example very much.

Fig. 2 is the stereogram of another kind of common centrifugal fan in the prior art.As shown in Figure 2, blast device 100 comprises a casing 101, an impeller 102 and a driving mechanism (for example motor) (not shown).Obviously, the driving mechanism of blast device 100 is contained within the impeller 102, so be not shown among the figure.Same Fig. 1, the utility model are divided into the running shaft (not shown) of wound impeller 102 with casing 101 and in fact are parallel to the axial casing 101A of portion of the running shaft extension of impeller 102, with the side direction casing 101B of portion perpendicular to above-mentioned running shaft.This blast device 100 also has: a wind inlet 103 is opened on the side direction casing 101B of portion; With an exhaust outlet 104, be opened on the axial casing 101A of portion.

Referring to Fig. 2, owing to the driving mechanism (not shown) is contained within the impeller 102, so in the small-sized desire heat radiation body of the blast device 100 of this kind pattern applicable to for example notebook computer.

In Fig. 2, on behalf of the flow direction of air-flow, arrow I, this specification represent that air-flow flows into blast device 100 with the direction of arrow, and arrow O represents that air-flow flows out blast device 100.When impeller 102 rotation, air-flow enters into casing 101 inside (shown in arrow I) of blast device 100 by wind inlet 103, blows out (shown in arrow O) from exhaust outlet 104 again, reaches the effect of convection current thus.

Fig. 3 is the schematic representation in the body 200 that a kind of common blast device 100 in the prior art is installed in the desire heat radiation.Arrow I and O also represent the flow direction of air-flow.As shown in Figure 3, must reserve a space so that air-flow can enter blast device 100 via wind inlet 103 on the blast device 100, flow out from exhaust outlet 104 again.If the thickness of body 200 is restricted, then certainly will to reduces the space to be preserved of the thickness of blast device 100, thereby reduce the air quantity of blast device 100 with assurance wind inlet 103.In addition, arrow I and O are in fact mutually perpendicular direction, and the air-flow that flows to blast device 100 is through the turning of an angle of 90 degrees, certainly will cause some losses and reduce air quantity.

Therefore, the purpose of this utility model provides and a kind ofly can be applicable to slim desire heat radiation body (for example notebook computer), and the centrifugal fan of more air quantity can be provided.

The utility model provides a kind of centrifugal fan, comprising: a driving mechanism; One is subjected to the driving of described driving mechanism and the impeller that rotates; One casing has the axial casing that in fact also in fact is parallel to the running shaft extension of described impeller around the running shaft of described impeller; And at least one wind inlet and at least one exhaust outlet, it is opened on the described casing; It is characterized in that: described wind inlet and described exhaust outlet all are opened on the described axial casing, and described driving mechanism is contained in the described impeller.

According to centrifugal fan of the present utility model, wherein, described exhaust outlet and wind inlet are opened on the same side of described axial casing.

According to centrifugal fan of the present utility model, the number of wherein said wind inlet is 2, and the number of described exhaust outlet is 1.

According to centrifugal fan of the present utility model, the number of wherein said wind inlet is 1, and the number of described exhaust outlet is 2.

Brief Description Of Drawings:

Fig. 1 is the stereogram of a kind of common blast device in the prior art.

Fig. 2 is the stereogram of another kind of common blast device in the prior art.

Fig. 3 is installed in the schematic representation of the body of desire heat radiation for the blast device of Fig. 2.

Fig. 4 is the stereogram of the utility model first embodiment's blast device.

Fig. 5 is installed in the schematic representation of the body of desire heat radiation for the blast device of Fig. 4.

Fig. 6 is the schematic representation of the utility model second embodiment's blast device.

Fig. 7 is the schematic representation of the utility model the 3rd embodiment's blast device.

Fig. 8 is the schematic representation of the utility model the 4th embodiment's blast device.The explanation of symbol:

The I-arrow

The O-arrow

The 100-blast device

The axial casing of 101A-portion

101B-side direction casing portion

The 101-casing

The 102-impeller

The 103-wind inlet

The 104-exhaust outlet

The 105-driving mechanism

The 200-body

Below with reference to Figure of description, centrifugal fan of the present utility model is elaborated.

The kind of blast device generally can be divided into axial flow and centrifugal two kinds, and blast device of the present utility model mainly is a centrifugal fan.

1. first embodiment

Fig. 4 is the stereogram of the utility model first embodiment's blast device.Referring to Fig. 4, impeller and driving mechanism etc. are covered fully by casing 101 and do not demonstrate.The member that is had because of blast device 100 is identical with Fig. 2 haply, so only explanation and the different part of prior art.Comparison diagram 4 and Fig. 2, can learn that the characteristics of blast device 100 of the present utility model are: the wind inlet 103 of blast device 100 is on the axial casing 101A of portion that is opened in exhaust outlet 104 opposition sides.Its reason will be illustrated in down.

In Fig. 4, the direction of arrow also is to represent the flow direction of air-flow, and arrow I represents that air-flow flows into blast device 100, and arrow O represents that air-flow flows out blast device 100.When the impeller (not shown) turned round, air-flow entered into casing 101 inside (shown in arrow I) of blast device 100 by wind inlet 103, blows out (shown in arrow O) from exhaust outlet 104 again, reaches the effect of airflow convection with this.So for whole blast device 100, the flow direction of air-flow is a kind of mode that belongs to " directly advancing directly ".

Fig. 5 is the schematic representation in the body 200 that blast device 100 of the present utility model is installed in the desire heat radiation.Arrow I and O also represent the flow direction of air-flow.As shown in Figure 5, need not reserve a space on the blast device 100 so that after air-flow can enter blast device 100 via wind inlet 103, flow out from exhaust outlet 104 again.So, can dwindle the thickness of body 200 according to this, or under the situation that does not increase body 200 thickness, the blast device 100 that used thickness is bigger provides bigger air output with this.In addition, for blast device 100,, can also reduce the loss that air-flow causes because of turning to because air-flow is mobile in the mode of " directly advancing directly ".

Because the part of centrifugal fan of the present utility model except that casing 101 is all same as the prior art, so below only casing 101 parts of centrifugal fan of the present utility model are described, and no longer explain and illustrate other members same as the prior art (for example impeller, drive unit etc.).

2. second embodiment

Fig. 6 is the schematic representation of the utility model second embodiment's blast device.In the present embodiment, blast device 100 members identical with first embodiment that had are omitted its detailed description.Itself and first embodiment's difference only is described.Difference is: present embodiment has a wind inlet 103 and two exhaust outlets 104.Therefore, when needs multichannel exhaust outlet, can use this blast device.

3. the 3rd embodiment

Fig. 7 is the schematic representation of the utility model the 3rd embodiment's blast device.In the present embodiment, blast device 100 members identical with first embodiment that had are omitted its detailed description.Itself and first embodiment's difference only is described.Difference is: present embodiment has two wind inlets 103 and an exhaust outlet 104.Therefore, under the situation that allows the multichannel wind inlet, can use this blast device.

4. the 4th embodiment

Fig. 8 is the schematic representation of the utility model the 4th embodiment's blast device.In the present embodiment, blast device 100 members identical with first embodiment that had are omitted its detailed description.Itself and first embodiment's difference only is described.Difference is: the wind inlet 103 and the exhaust outlet 104 of present embodiment all are opened on the same side direction casing 101A of portion.Certainly, for avoiding the generation of eddy current, wind inlet 103 and exhaust outlet 104 segment distance of must being separated by, or be situated between and add that a dividing plate (not shown) is separated.

According to centrifugal fan of the present utility model, axially offering wind inlet and exhaust outlet in the casing portion, then needn't reserve the space between the body (for example notebook computer) of side direction casing portion and institute desire heat radiation, with this thickness that dwindles the thickness of body or increase centrifugal fan in order to increase air quantity.On the other hand, can reduce the loss that air-flow causes because of turning to again.

The specific embodiment that is proposed in the above-mentioned detailed description is only in order to be easy to illustrate technology contents of the present utility model, and be not with the utility model narrow sense be limited to described embodiment.Those skilled in the art, inspiration by the various embodiments described above, be not difficult to make various improvement, change or replacement according to centrifugal fan of the present utility model, therefore, these improvement, change or replacement should not thought to have broken away from design of the present utility model or claims institute restricted portion.

Claims

1. a centrifugal fan comprises: a driving mechanism; One is subjected to the driving of described driving mechanism and the impeller that rotates; One casing has the axial casing that in fact also in fact is parallel to the running shaft extension of described impeller around the running shaft of described impeller; And at least one wind inlet and at least one exhaust outlet, be opened on the described casing; It is characterized in that: described at least one wind inlet and described at least one exhaust outlet all are opened on the described axial casing, and described driving mechanism is contained in the described impeller.

2. centrifugal fan according to claim 1 is characterized in that: wherein, described exhaust outlet and described wind inlet are opened on the same side of described axial casing.

3. centrifugal fan according to claim 1 is characterized in that: the number of described wind inlet is 2, and the number of described exhaust outlet is 1.

4. centrifugal fan according to claim 1 is characterized in that: the number of described wind inlet is 1, and the number of described exhaust outlet is 2.