TWI262991B - Centrifugal blower having auxiliary radial inlets - Google Patents

Abstract

A centrifugal blower comprises a housing, a cover plate, and an impeller. The housing has an inner space, a radial outlet, an annular wall, and at least one auxiliary radial inlets. The cover plate has an axial inlet. The impeller is rotatably mounted in the inner space of the housing. The auxiliary radial inlets are formed on the annular wall, and dimensioned different from the radial outlet. Thus, when the impeller is rotated, the axial inlet of the cover plate and the auxiliary radial inlets of the housing can suck airflow along both of axial and radial direction, respectively.

Description

1262991 V. INSTRUCTIONS (1) The structure of the heat-dissipating fan, in particular, relates to the invention of the invention. The invention is based on an ice, 7 million, 彳, 丨 $ 1 at least one radial auxiliary air inlet. , with a radial air outlet of the shell, the side sill is set to 2

Centrifugal heat-dissipating fan structure L for increasing the amount of air intake [Prior Art] d π + conventional centrifugal fan-type fan structure As shown in Fig. 1, the upper cover includes i, the cover plate 2, and a fan wheel 3. The housing 1 is provided with a diameter: an air outlet 1 2: The cover 2 is provided with an axial air inlet 21 . The fan wheel 3 is rotatably accommodated in f: , u 6 is drawn into the axial seat 1 from the axial air inlet 21. In operation, the fan wheel 3 7 ® airflow, and after the axial airflow is turned, the radial output port 11 is radially outputted for heat dissipation of the heat sink. However, in the Becker, the upper fan wheel 3 only draws a limited airflow from above the cover plate 2, but does not utilize the radial airflow around the casing 1, so that it is difficult to effectively increase the overall air volume and wind pressure. . η: Another conventional centrifugal fan structure, such as the Republic of China Announcement No. 444 (4) No. 7 "centrifugal air supply device" new patent, which does not have an axial air inlet, but only at least one diameter around the radial air outlet The air inlet is directed to the radial airflow around the housing directly through the radial air inlet. However, the construction of this patent may actually allow the air flow to enter or exit from the radial air inlet at the same time, or it may be simultaneously output or entered from the radial air outlet. As a result, this configuration causes airflow disturbances, lacks a uniform flow direction, and does not achieve the desired effect of utilizing the ambient airflow for heat dissipation. For the above reasons, it is still necessary to further improve the above-described centrifugal fan structure. In view of the above, the present invention improves the above disadvantages, and is one of the housings.

C:\Logo-5\Five Continents\PK9547.ptd

1262991 V. INSTRUCTIONS (2) A radial auxiliary air inlet is formed on the ring wall, and the radial auxiliary air inlet is structurally distinct from one of the radial air outlets of the housing and can be sucked into the periphery of the housing Radially assisted airflow to assist an axial air inlet. Therefore, the present invention can relatively increase the amount of intake air and the amount of airflow, thereby improving the overall heat dissipation performance. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a centrifugal heat sink structure that is capable of inhaling a radial auxiliary airflow around a housing by a radial auxiliary air inlet, thereby providing the present invention with an effect of increasing the amount of intake air. A secondary object of the present invention is to provide a centrifugal heat dissipating fan structure which is formed on a ring wall of a shell to form a slanting auxiliary air inlet, the inner wall surface of which conforms to the direction of the wind blowing of a fan wheel, so that the present invention has Increase the smoothness of intake air and reduce the effect of intake sound. Another object of the present invention is to provide a centrifugal heat dissipating fan structure, which is formed by forming a radial auxiliary air inlet on a ring wall of a shell, wherein the inner circumferential surface of the ring wall conforms to the driving direction of a wheel to form a plurality of air blowing directions. The inner extension guide plate has the effect of increasing the air intake smoothness and reducing the intake noise. According to the centrifugal fan structure of the present invention, it comprises a housing, a cover plate and a fan wheel. The housing is provided with an internal space, a radial air outlet, a ring wall and at least one radial auxiliary air inlet. The cover is provided with an axial air inlet. The fan wheel is rotatably disposed in the inner space. The radial auxiliary air inlet is disposed on the ring wall and can be structurally distinguished from the radial air outlet. Therefore, when the fan wheel rotates, the axial airflow and the radial auxiliary air inlet respectively absorb the axial airflow and the radial auxiliary airflow.

C:\Logo-5\F ive Cont inents\PK9547. ptd Page 7 1262991 V. DESCRIPTION OF THE INVENTION (3) [Effects] The above and other objects, features, and advantages of the present invention will become more apparent from the claims. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to Figures 2 and 3, the centrifugal heat dissipation ^ / ..., in the first embodiment of the present invention. /Into u (2)"丨-I, ,广/>1 π A 々Ο From ~Work, month and %; The fan structure includes a shell 1, a cover 2 and a wheel 3. The housing 1 is provided with an internal space 1 〇, a radial air outlet 1 1 , a ring wall 2 and a radial auxiliary air inlet 13 . The inner space 1 〇 is eccentrically disposed with a shaft tube i 〇 1 for rotatably coupling the fan wheel 3. The radial air outlet 1 1 is provided on one side of the internal space 1 。. The annular wall 12 is a volute frame that surrounds the interior space 10. The radial auxiliary air inlet 13 is disposed on the annular wall 12, and the radial auxiliary air inlet 13 is a circular, square, or the like geometric shape, and is preferably a grid-shaped slit, and the sin is close to the radial direction.屮涵^ ^ ^ t Air outlet il. The inlet air area of the radial auxiliary air inlet 13 is smaller than the air inlet or outlet area of the radial air outlet, so that it can be in the construction port 21, which corresponds to the fan wheel 3. The seesaw 2 is provided with an axial rubber plate 32 and a plurality of blades 33: The feather wheel 3 is formed by a hub 31 and a ring. The fan wheel 3 is accommodated on the first side a when the inner wheel 3 is coupled to the shaft tube 1〇1, that is, located closer to the radial air outlet 1 1 . An eccentric position of one μ, and a second side b of the tuyere 1 of the fan wheel 3. At the same time, the first side a '' but farther away from the radial direction is the wind-starting end of the fan wheel 3, and the ring wall 12 which is close to the first side a can be regarded as the driving end of the fan wheel 3. On the other hand, the sorrow wall of the younger side b can be regarded as a statement, which is preferably close to the two-way auxiliary air inlet 13 of the private month of a private month, and the vicinity of the wind-opening end of the ring wall 12 1

Page 8 1262991 V. Description of the invention (.1, May, re-parameter, 3⁄4 brother 3, when the fan blade 3 3 of this eight 3 is rotated by the shaft & The fan wheel is in turn. At this time, the fan blade 3 / air inlet 2 1 of the fan wheel 3 absorbs the axial force above, so that the wind-assisting force at the wind-starting end can form a radial auxiliary airflow that attracts the surrounding佴, near radial auxiliary air inlet 13 3 wind pressure in the suction space 10. In the wind to increase the intake air *, and increase the inlet air area of the inner 13 is significantly smaller than the diameter = between, due to the radial auxiliary The tuyere of the radial auxiliary air inlet 13 only; the air outlet area of the air outlet 11, and therefore the airflow will be called by the radial air: no energy, and the centrifugal cooling fan can be simultaneously utilized: As a result, the auxiliary airflow of the present invention is made to disperse the axial airflow and the radial direction (such as the heat dissipating fins) of the radial outflowing cooker, and the heat radiating object at the lower mouth of the Taguchi L^ Air volume and heat dissipation efficiency...., the mouth can really improve the overall out, please refer to Figure 4, its reveal # The heat fan structure is formed in the vicinity of the fourth side of the centrifugal air outlet u of the first embodiment of the present invention, and forms a plurality of radial back 2 fan wheels. 3 驱风起端.^ 〇13 μ A, Wu, column. Thereby, when the fan wheel 3 starts to drive the wind, the parallel rows of the auxiliary air inlets 13 draw more radial direction; The amount of intake air, wind pressure, and air volume of each radial auxiliary unit can be increased as described in the fifth and seventh embodiments. The third and fourth embodiments of the present invention disclose the configuration of the centrifugal fan. Compared with the second embodiment, the third and fourth each form a plurality of radial auxiliary aids near the beginning of the fan wheel 3 of the annular wall 12

1262991

Into the cow's but the radial auxiliary air inlet 13, 'the two inner wall surfaces 131, 132 are inclined to be inclined in the direction of the wind of the fan wheel 3. As shown in Fig. 6, in the first κ embodiment of the net, the two inner wall faces 1 3 1 and 1 3 2 are inclined, but are arranged in parallel. As shown in Fig. 7, in the fourth embodiment, =1 = wall faces 131, 132 form an inclination, but the common radial inward narrowing runs between the squats, and the six-six s 3π is used to further increase the smoothness and reduce the intake noise, and the radial auxiliary air inlet 1 3" is also

The inner wall of the corpse is 丨31,132, and the structure is more distinct from the I-direction vent 1 1 Q

The dispersion 1 is as shown in Fig. 8, which discloses the centrifugal structure σ of the fifth embodiment of the present invention. Compared with the third embodiment, the fifth embodiment also forms a plurality of radial auxiliary air inlets 1 3 ′′ near the wind-starting end of the ring wall L feather wheel 3, and the same day is the ring _ 1 9 such as ^ 71 The inner circumferential surface corresponds to each of the radial auxiliary air inlets 13 , and further, the two inner openings are formed to form a plurality of inner extension guides 14 . The inner extension guides 14 are resigned to the direction of the fan wheel 3 The inclination is formed, so that the radial auxiliary assisting tuyere 13 has better intake smoothness and relatively reduces intake air. Further, the radial auxiliary air inlet 13 can also utilize the inner portion. The guide plate 14' is extended and is more clearly distinguished from the radial air outlet 丨j.

As described above, compared with the conventional blast-type cooling fan of Fig. 1, the axial airflow can be sucked only by the axial air inlet 21, and the disadvantage of the intake air amount cannot be effectively improved. The invention provides at least one radial auxiliary air inlet 13 in the vicinity of the radial air outlet 1 1 of the annular wall 12, which can be structurally distinguished from the radial air outlet 1 1 and effectively increase the air intake amount. And air volume 'improves overall heat dissipation, increases intake air smoothness and reduces intake noise

C:\Logo-5\Five Continents\PK9547.ptd Page 10 1262991

C:\Logo-5\Five Continents\PK9547.ptd Page 11 1262991 Simple description of the drawing [Simple description of the drawing] Fig. 1: A combined perspective view of the conventional centrifugal cooling fan structure. Fig. 2 is an exploded perspective view showing the structure of the centrifugal fan of the first embodiment of the present invention. Fig. 3 is a cross-sectional view showing the structure of a centrifugal fan according to a first embodiment of the present invention. Fig. 4 is an exploded perspective view showing the structure of the centrifugal fan of the second embodiment of the present invention. Fig. 5 is an exploded perspective view showing the structure of the centrifugal fan of the third embodiment of the present invention. Fig. 6 is a cross-sectional view showing the construction of a centrifugal fan in accordance with a third embodiment of the present invention. Figure 7 is a cross-sectional view showing the structure of a centrifugal fan in accordance with a fourth embodiment of the present invention

Fig. 8 is a cross-sectional view showing the structure of a centrifugal fan in accordance with a fifth embodiment of the present invention. [Main component symbol description] 1 Housing 10 Internal space 101 Shaft tube 11 Radial air outlet U 12 Ring wall 13 Radial auxiliary air inlet D 13, Radial auxiliary air inlet 13M Radial auxiliary air inlet V 131 Inner wall surface 132 Inner wall 14 extending guide

C:\Logo-5\Five Continents\PK9547.ptd Page 12 1262991

C:\Logo-5\Five Continents\PK9547. ptd第13页

Claims (1)

1262991 VI. Patent application scope 1. A centrifugal heat dissipation fan structure, comprising: a housing, which is provided with an inner space, a radial air outlet and a ring wall and a cover plate, and an axial air inlet; a wheel corresponding to the axial air inlet and rotatably disposed in the inner space; and at least one radial auxiliary air inlet disposed on the ring wall, the fan wheel being detachable when the fan wheel is rotated The axial air inlet and the radial auxiliary air inlet simultaneously draw axial airflow and radial auxiliary airflow, respectively. 2. The centrifugal fan structure according to claim 1, wherein the radial air outlet has a first side and a second side, and the radial auxiliary air inlet is first to the radial air outlet. Side, and structurally distinguishable from the radial air outlet. 3. According to the centrifugal fan structure of the second application patent scope, the electric: the first side of the radial air outlet is close to the fan wheel driving end of the ring wall, and the second side thereof is close to the The fan wheel drive terminal of the ring wall, such that the radial auxiliary air inlet is close to the fan wheel drive end of the ring wall. 4. The centrifugal fan structure according to item 2 of the patent application scope, wherein the frame is a volute frame, and the fan wheel is disposed at an eccentric position of the inner space. 5. The centrifugal fan structure according to item 4 of the patent application scope, wherein the first side of the radial air outlet and the radial auxiliary air inlet are closer to the fan wheel, and the second side of the radial air outlet is Farther away from the fan wheel. 6. According to the centrifugal fan structure of the first application patent scope, wherein C: \Logo-5\Five Cont inents\PK9547. ptcl Page 14 1262991_ VI. Scope of Application The radial auxiliary air inlet is a grid-like slit. 7. The centrifugal fan structure according to item 1 of the patent application scope, wherein the radial auxiliary air inlet is a linear inclined slit. 8. The centrifugal heat sink structure according to the first aspect of the patent application, wherein the radial auxiliary air inlet has two inner wall surfaces, and the two inner wall surfaces are inclined to conform to the direction of the fan wheel. 9. The centrifugal fan structure according to item 8 of the patent application scope, wherein the inner wall of the radial auxiliary air inlet is arranged in parallel with each other at equal intervals, and the centrifugal cooling fan according to item 8 of the patent application scope The structure, wherein the inner wall surface of the radial auxiliary air inlet is a radially inwardly narrowing pitch 〇11, and the centrifugal heat dissipation fan structure according to the first aspect of the patent application, wherein the inner circumferential surface of the annular wall corresponds to each radial direction The auxiliary air inlet is additionally formed with several inner |^:@ extension guide plates, which are inclined in accordance with the direction of the fan wheel. C:\Logo-5\Five Continents\PK9547.ptd Page 15