TWI539079B - Centrifugal cooling fan - Google Patents

Description

Centrifugal cooling fan

The invention relates to a centrifugal cooling fan; in particular to an innovative centrifugal cooling fan structure type revealer with wind pressure gain effect.

In the design of the traditional centrifugal fan structure, since the fan blade structure directly contacts the flow channel, and the air gap between the blades is too large, it is difficult to control the airflow and is likely to cause backflow, so that the wind pressure is insufficient, thereby affecting the heat dissipation efficiency.

Based on the above problems, the related art has added a vane to the fan frame structure of the centrifugal fan, and the vane setting position generally corresponds to one side or the periphery of the rotating impeller, thereby improving the wind during the operation of the centrifugal fan. However, at present, the centrifugal fan structure has found in practical application experience that when the fan runner space height is sufficient, the relative height of the blade is determined by the blade height of the rotating impeller and the blade height of the vane. In fact, it can produce the expected wind pressure gain effect; however, with the current thin design development trend of the cooling fan, when the fan runner space height is reduced to a certain small height state due to the thin design, the blade of the rotating impeller The height of the blade of the height and the vane is greatly reduced compared with the normal state. Therefore, during the relative motion, the two sides are inevitably unable to produce the expected wind pressure gain effect due to insufficient tangent plane width.

It can be seen from the above description that at present, the conventional centrifugal fan structure design is still difficult to balance the thin design and the wind pressure gain effect, and the relevant industries have to think about breakthroughs.

Therefore, in view of the problems existing in the above-mentioned conventional centrifugal fan technology, how to develop an innovative structure that can be more ideal and practical, and the relevant industry should further consider the goals and directions of breakthrough.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a centrifugal cooling fan, and the technical problem to be solved is to solve the innovative breakthrough of how to develop a new centrifugal fan with more ideal and practicality.

The technical feature of the present invention is mainly that the centrifugal cooling fan comprises: a frame, comprising a substrate, a frame wall protruding from a side of the substrate, and an air outlet disposed on a side of the frame wall, wherein the intermediate portion of the substrate is There is a mounting portion for mounting a certain sub-seat, a first air inlet is arranged around the mounting portion, and a flow channel space is formed inside the frame wall; a cover plate, the cover group is formed at the convex end of the frame wall of the frame seat, and the cover plate a second air inlet is provided; a rotating impeller is arranged in a rotatable state on the stator seat, the rotating impeller includes a hub screwed on the stator seat and a plurality of blades on which the spacer ring is arranged on the circumferential side of the hub; a vane unit, a substrate protruding from the cover or the frame, comprising a plurality of stationary vanes of the spacer ring; an annular relief space formed in an annular concave shape formed at the outer circumference of the rotating impeller, by the ring The arrangement of the avoidance space is such that the blades of the rotating impeller are partitioned to form an inner circumference section and a peripheral section of the interval type; and the vane element unit is correspondingly placed in the annular avoidance space and interposed in the inner circumference area of the blade Between the segment and the peripheral segment.

The main effect and advantage of the present invention is that when the rotary impeller rotates, the inner and outer sections of the blade respectively move relative to the inner and outer sides of the vane unit to generate a double supercharging effect, thereby achieving a gain rotary impeller. Rotating the wind pressure, greatly improving the cooling efficiency of the centrifugal cooling fan, and allowing the centrifugal cooling fan to achieve better wind pressure effect after miniaturization, and it is particularly practical and progressive.

Please refer to the first, second, third, and fourth drawings, which are preferred embodiments of the centrifugal cooling fan of the present invention, but the embodiments are for illustrative purposes only and are not limited by the structure in the patent application; The centrifugal fan A includes a frame 10 including a substrate 11 , a frame wall 12 protruding from a side of the substrate 11 , and an air outlet 13 disposed on a side of the frame wall 12 . The middle portion of the substrate 11 is provided with a mounting portion 14 for mounting a certain sub-mount 145, the first portion of the mounting portion 14 is provided with a first air inlet opening 15, and the inner side of the frame wall 12 is formed with a first-class space 16; The cover group is formed at the convex end of the frame wall 12 of the frame 10. The cover 20 is provided with a second air inlet 22; a rotating impeller 30 is rotatably assembled on the stator base 145. The rotary impeller 30 The plurality of blades 33 are disposed on the stator base 145 and the plurality of blades 33 are disposed on the circumferential side of the hub 32. The stationary blade unit 40 is protruded from the base plate 11 of the cover 20 or the frame 10, including the spacing. a plurality of stator blades 41 in the ring array; an annular relief space 50 formed in an annular concave shape on the outer periphery of the blade 33 of the rotary impeller 30 At the narrowing interval, the blade 33 of the rotary impeller 30 is partitioned to form the inner circumferential section 332 and the peripheral section 334 of the spaced type by the arrangement of the annular relief space 50; and wherein the vane unit 40 is Correspondingly disposed in the annular avoidance space 50 and between the inner circumferential section 332 of the blade 33 and the peripheral section 334.

With the above-described structural composition and technical features, as shown in FIG. 4, when the rotary impeller 30 of the centrifugal cooling fan A rotates (as indicated by an arrow L1), the inner peripheral section 332 of the blade 33 And the peripheral section 334 is respectively moved relative to the inner and outer sides of the vane unit 40 to generate a double supercharging effect, thereby gaining the wind pressure when the impeller 30 is rotated by the gain, thereby improving the heat dissipation performance of the centrifugal cooling fan A; In addition to this advantage, when the centrifugal cooling fan A reduces the height of the flow path space 16 due to the miniaturization design, the blade 33 of the rotary impeller 30 and the stationary blade 41 of the vane unit 40 are relatively reduced in width, and the blade 33 can be formed by the aforementioned blade 33. The inner circumferential section 332 and the peripheral section 334 respectively have a technical feature of the double supercharging effect caused by the relative movement inside and outside the vane unit 40, so that the centrifugal cooling fan A can still achieve better wind pressure after miniaturization. effect.

As shown in FIG. 5, in accordance with the different requirements of the boosting strength of the blades 33 of the rotating impeller 30 in the flow space 16, the stationary vanes 41 of the vane unit 40 may be arranged to be angularly different. The angle-differentiated configuration type adopts an implementation form in which all the stationary blades 41 are angularly differentiated, or an embodiment in which a specific segment of the stationary blades 41 is angularly tapered. The example drawing is omitted.) Specifically, in view of the angle difference configuration type shown in FIG. 5, all the stationary blades 41 of the vane unit 40 are divided into a first section 411, a second section 412, and a third section 413. The fourth section 414, wherein the first section 411 is closest to the air outlet 13 and the third section 413 is opposite to the farthest glass air outlet 13 because the first blade 411 closest to the air outlet 13 is provided with a stationary blade 41 The boosting demand is relatively minimum, so the angle formed between the stationary vane 41 of the section and the central radiation of the rotating impeller 30 (as indicated by the arrow L2) is the smallest, and the stationary vane 41 of the third section 413 is provided. The boosting demand is relatively largest, so the angle between the set angle of the stationary vanes 41 of the section and the central radiation of the rotating impeller 30 (as indicated by the arrow L2) is the largest; thereby obtaining a more desirable supercharging effect.

As shown in FIG. 4, the inner section 332 of the blade 33 of the rotary impeller 30 and the peripheral section 334 may be in a para-position relationship.

As shown in FIG. 6, the inner section 332 of the blade 33 of the rotary impeller 30 and the peripheral section 334 may also be in a misaligned relationship.

Further, as shown in FIG. 7, the embodiment in which the vane unit 40 is protruded from the substrate 11 of the frame 10 is shown. In this example, since the frame 10 is made of a plastic material, the static blade 41 of the vane unit 40 and the substrate 11 of the frame 10 can be integrally formed of a plastic material; When the stationary blade 41 of the unit 40 is disposed on the structure of the cover plate 20, as shown in the second and third figures, the stationary blade 41 can also be a plastic material, and the structure of the cover plate 20 corresponding to the position of the stationary blade 41 can be formed. The plastic fitting hole 24 is embedded in the plastic material of the stationary blade 41 to achieve a combined positioning state.

Advantages of the present invention: The "centrifugal cooling fan" disclosed in the present invention mainly forms the annular relief space by the retraction interval of the outer circumference of the blade of the rotary impeller, and the blades of the rotary impeller are partitioned to form a spacer type. The present invention is an innovative unique structural type and technical feature in which the inner wall section and the peripheral section are arranged in the annular avoidance space and interposed between the inner and outer sections. In contrast to the conventional structure proposed in the prior art, when the rotary impeller rotates, the inner and outer sections of the blade are respectively moved relative to the inner and outer sides of the vane unit to produce a double supercharging effect. Thereby, the rotating wind pressure of the rotating rotary impeller is realized, the heat dissipation performance of the centrifugal cooling fan is greatly improved, and the centrifugal cooling fan can still achieve the better wind pressure effect after miniaturization, and the utility model has the practical progress.

The above embodiments are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention. The principles are changed and modified to achieve an equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

A‧‧‧Centrifugal cooling fan 10‧‧‧Frame 11‧‧‧Substrate 12‧‧‧Fence 13‧‧‧Air outlet 14‧‧‧Installation Department 145‧‧‧Studstock 15‧‧‧ First Air inlet 16‧‧‧Spiral space 20‧‧‧ Cover 22‧‧‧Second air inlet 24‧‧‧Plastic fitting hole 30‧‧‧Rotating impeller 32‧‧·Wheel 33‧‧‧ Blade 332‧‧ ‧ Neighboring section 334‧‧ ‧ Peripheral section 40‧‧ ‧ Stable leaf unit 41‧‧ ‧ Static blade 411‧‧‧ First section 412‧‧‧Second section 413‧‧ Third section 414 ‧‧‧Fourth section 50‧‧‧Circular avoidance space

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of a preferred embodiment of the present invention. Figure 2 is a perspective view of a combination of preferred embodiments of the present invention. Figure 3 is a cross-sectional view showing a partial structure of a preferred embodiment of the present invention. Figure 4 is a plan view of a preferred embodiment of the invention. Fig. 5 is a view showing an embodiment in which the inner peripheral section and the peripheral section of the present invention are in a misaligned relationship. Fig. 6 is a view showing an embodiment in which the vane unit of the present invention is provided on a frame substrate. Figure 7 is a diagram showing another variation of the configuration of the vane cell unit of the present invention.

A‧‧‧Centrifugal cooling fan

10‧‧‧ frame

11‧‧‧Substrate

12‧‧‧ frame wall

13‧‧‧air outlet

14‧‧‧Installation Department

145‧‧ ‧ Stator seat

15‧‧‧First air inlet

16‧‧‧Runner space

20‧‧‧ Cover

22‧‧‧second air inlet

30‧‧‧Rotating impeller

32‧‧·wheels

33‧‧‧ leaves

332‧‧‧ Inner section

334‧‧‧ peripheral section

40‧‧‧Statler unit

41‧‧‧Static blades

50‧‧‧Circular avoidance space

Claims (3)

A centrifugal cooling fan includes: a frame, a substrate, a frame wall protruding from a side of the substrate, and an air outlet disposed on one side of the frame wall, wherein the middle portion of the substrate is provided with a mounting portion For the installation of a certain sub-seat, a first air inlet is arranged on the periphery of the installation part, and a first-class air space is formed on the inner side of the frame wall; a cover plate is formed on the convex end of the frame wall of the frame seat, and the cover plate is provided a second air inlet; a rotating impeller is rotatably assembled on the stator base, the rotating impeller includes a stator seat, a hub screwed on the stator seat, and a spacer ring disposed on a peripheral side of the hub a vane unit; a stationary vane unit protruding from the base plate of the cover or the frame, comprising a plurality of stationary vanes of the spacer ring; an annular relief space formed in an annular concave shape in the outer periphery of the vane of the rotary impeller At the narrowing interval, by the arrangement of the annular avoidance space, the blades of the rotating impeller are separated to form an inner circumference section and a peripheral section of the interval type; and wherein the vane unit is correspondingly placed in the ring avoidance In the space and between the inner circumference of the blade and the periphery Between the segments; wherein the static blade strength of the vane unit is different according to the requirements of the supercharging strength in the runner space, the vane of the vane unit is configured to be an angled different configuration; The embodiment adopts an embodiment in which all the stationary blades are divided into angles, or an embodiment in which a specific segment of the stationary blades is angularly configured; thereby, when the rotating impeller rotates, the blades thereof The inner circumference section and the outer section respectively move relative to the inner and outer sides of the vane unit to generate a double supercharging effect, thereby increasing the wind pressure when the rotating impeller rotates, and improving the heat dissipation performance of the centrifugal cooling fan. The centrifugal cooling fan according to claim 1, wherein the inner circumference section of the rotating impeller and the peripheral section are in abutting relationship. The centrifugal cooling fan according to claim 1, wherein the inner circumference section of the rotating impeller and the peripheral section are in a dislocation relationship.