CN1616833B - Centrifugal fan with stationary blades and its fan frame - Google Patents

Abstract

The invention provides a centrifugal fan containing static blades and a fan frame thereof, wherein the centrifugal fan containing the static blades comprises a first frame, a second frame, a rotating device, a first movable blade part and a second movable blade part, the second frame is provided with a plurality of static blades, the first movable blade part is combined with the rotating device and is provided with a first movable blade, the second movable blade part is combined with the first movable blade part and is provided with a second movable blade, and the first movable blade and the second movable blade are respectively positioned at the upper side and the lower side of the static blades.

Description

Centrifugal fan with stationary blades and its fan frame

technical field

The invention relates to a centrifugal fan, in particular to a centrifugal fan with stator blades on its fan frame.

Background technique

A generally known centrifugal fan (blower) 1, as shown in Figure 1, includes an outer frame 10, a motor 20 and a blade structure 30, wherein the outer frame 10 has an air inlet 11 and an exhaust port (not shown) As shown in the figure), the motor 20 is set on the base 101 of the outer frame 10 to rotate the blade structure 30 . The fan blade structure 30 also includes a hub 31 , a bottom plate 32 and a plurality of rotor blades 33 formed thereon. However, since the fan blade structure is in direct contact with the flow channel, and the air gap between the rotor blades is large, it is difficult to control the air flow, and it is easy to cause backflow and affect the heat dissipation efficiency.

Therefore, as the efficiency of the electronic components increases, in order to improve the heat dissipation efficiency of the centrifugal fan, the air volume is generally increased by enlarging the flow channels in the outer frame. However, in a limited space, this approach is not feasible, and it is likely to cause problems such as uneven air volume, noise, and reduced air volume.

Another known improvement technology is to increase the number and size of the rotor blades, but due to the limited space, it will drive the rotation of the airflow, which will reduce the heat dissipation efficiency of the centrifugal fan itself.

Contents of the invention

In view of this, the object of the present invention is to provide a centrifugal fan, which adds one or more sets of moving and stationary blades to increase the wind pressure.

Another object of the present invention is to provide a fan frame of a centrifugal fan, on which more than one set of stationary blades are arranged to guide the air flow in a straight line.

According to the present invention, there is provided a centrifugal fan with stator blades, which includes a fan frame and a fan blade structure, wherein the fan frame has a plurality of stator blades, and a wall surface extends inward from an air inlet of the fan frame and is in contact with An air collecting passage is formed between the fan frame walls, the fan blade structure is arranged in the fan frame, and has a plurality of first moving blades and a plurality of second moving blades, and the first moving blades and the second moving blades are respectively located on the stationary blades on both sides.

In a preferred embodiment, the fan frame has an air collecting passage, an air inlet and an air outlet, and the first movable blade is located near the air inlet, and has a slope on the side close to the air inlet, the air collecting passage There is an inlet, and the second bucket is located near the inlet.

In addition, the fan blade structure has a flange near the inlet, which extends toward the direction of the air collecting channel, and in the axial direction of the fan blade structure, the height of the air collecting channel and the height of the flow channel of the moving and stationary blades partially or completely overlap, while The cross-sectional area of the air-collecting channel is substantially equal to the cross-sectional area of the air outlet.

In another preferred embodiment, the fan frame includes a first frame and a second frame, and the first frame is used for setting the fan blade structure. And the second frame is combined with the first frame, and the vane is formed on the second frame.

Moreover, the centrifugal fan also includes a rotating device, which is arranged on the first frame and used to drive the fan blade structure.

In another preferred embodiment, the fan blade structure includes a first moving blade part and a second moving blade part, the first moving blade part has the first moving blade, the second moving blade part is combined with the first moving blade part, and It has a second rotor blade and a flange.

In the present invention, another centrifugal fan containing stationary blades is provided, which includes a first frame, a second frame, a rotating device, a first moving blade part, and a second moving blade part. a vane, and has a wall, extending toward the first frame to form a collection channel between the first frame and the second frame; the rotating device is arranged on the first frame, and the first rotating blade part and the rotating The device is combined, and has a plurality of first moving blades, and the second moving blade part is combined with the first moving blade part, and has a plurality of second moving blades, wherein the first moving blade and the second moving blade are respectively located on the two sides of the stationary blade side.

In the present invention, another centrifugal fan containing stator blades is provided, which includes a fan frame and a fan blade structure, wherein the fan frame is provided with a plurality of stator blades, has an air collecting channel, and has a wall surface Extending to the inside of the fan frame to form an air collection passage between the wall surface and the fan frame wall, the air collection passage has an inlet, the fan blade structure is arranged in the fan frame, and has a flange, a plurality of first The rotor blade and the plurality of second rotor blades, the first rotor blade and the second rotor blade are respectively located on both sides of the stator blade, and the flange is located near the inlet and extends toward the direction of the air collector.

In the present invention, another centrifugal fan containing stator blades is provided, which includes a fan frame and a fan blade structure, wherein the fan frame is provided with a plurality of stator blades, and has a wall extending inwardly of the fan frame, An air collecting channel is formed between the wall surface and the fan frame wall, the fan blade structure is arranged in the fan frame, and has a plurality of first moving blades and a plurality of second moving blades, the first moving blades and the second moving blades The blades are respectively located on both sides of the stationary blade, and in the axial direction of the fan blade structure, the height of the air collecting channel and the height of the moving and stationary blades partially or completely overlap.

In the present invention, a centrifugal fan containing stator blades is provided, comprising: a fan frame having at least one set of stator blades, a wall surface extending inward from an air inlet of the fan frame and between the fan frame wall An air collecting passage is formed; and a fan blade structure is arranged in the fan frame and has at least one set of moving blades.

In the present invention, a fan frame is provided, which is suitable for a centrifugal fan, and the centrifugal fan has a blade structure, and the fan frame is characterized in that: a plurality of static blades are arranged on the side facing the blade structure. leaf. And the fan frame has an air inlet, and a wall surface extends inwardly from the air inlet, and an air collecting channel is formed between the wall surface and the fan frame wall.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment will be described in detail below together with the accompanying drawings.

Description of drawings

Fig. 1 is the schematic diagram of known centrifugal fan;

Fig. 2a is a three-dimensional exploded view of a centrifugal fan containing stator blades in the present invention;

Fig. 2b is a combined perspective view of the centrifugal fan shown in Fig. 2a;

Figure 3a is a cross-sectional view along line 3a-3a in Figure 2b;

Figure 3b is a cross-sectional view along line 3b-3b in Figure 2b; and

Fig. 4 is a comparison chart of air pressure and air volume characteristics between the centrifugal fan of this case and the known centrifugal fan.

Detailed ways

Fig. 2a, 2b, 3a, 3c have shown the centrifugal fan 2 that contains stationary vane of the present invention, and it comprises a fan frame 100, a blade structure 200, and a rotating device 300, and wherein rotating device 300 is shown in Fig. 3 a, Including the main shaft, rotor, stator, bearing, circuit board, fasteners and other components, since the rotating device 300 in the present invention is the same as the known rotating device, its detailed description is omitted here, and the symbols of the above-mentioned components are not specially marked .

The fan frame 100 includes a first frame 110, a second frame 120 and a plurality of vanes 130, wherein the first frame 110 serves as the base of the centrifugal fan 2, and the rotating device 300 is sleeved on the sleeve 111 on the first frame 110 In addition, the second frame 120 is combined with the first frame 110, and a plurality of stator blades 130 are formed thereon, and the stator blades 130 can direct the airflow flowing into the centrifugal fan 2, And can increase the wind pressure.

Also, as shown in FIG. 2b, the fan frame 100 has an air inlet 150 and an air outlet 160, and as shown in FIG. Road (or called air storage tank) 140; again, with reference to Fig. 3b, the width of air collecting channel 140 is not uniform, but the closer to air outlet 160, the width of air collecting channel 140 is larger, and the width of air outlet 160 is based on this The air-collecting channel 140 is designed, that is, as shown by the imaginary line F in FIG. The wind pressure in the channel 140 is more even, which can improve the cooling efficiency of the centrifugal fan 100 .

It should be understood that the cross-sectional area of the air-collecting channel 140 may be substantially equal to the cross-sectional area of the air outlet 160 , thereby avoiding the reduction of the work efficiency due to the change of the air flow area.

The fan blade structure 200 is disposed in the fan frame 100 and includes a first rotor blade part 210, a second rotor blade part 220, a plurality of first rotor blades 230, and a plurality of second rotor blades 240, wherein the first rotor blade The plurality of first moving blades 230 are arranged on the part 210; the second moving blade part 220 can be engaged with the first moving blade part 210, and the plurality of second moving blades 240 and a flange 221 are arranged thereon, protruding The edge 221 is formed in an upward hooking manner, that is, the flange 221 extends toward the direction of the air-collecting channel 140 , so as to introduce the airflow upward into the air-collecting channel 140 and then send it out from the air outlet 160 .

Also, in the figure, the second moving blade part 220 is combined with the first moving blade part 210 by engaging, but it is not limited to this, and other ways can also be used, such as fusion; In the cross-sectional view of FIG. 3 a , the joining line between the second bucket part 220 and the first bucket part 210 and the joining line between the first frame 110 and the second frame are omitted.

The first moving blade 230 is located near the air inlet 150, and a slope 230a can be formed on the side close to the air inlet 150, thereby increasing the working area of the air inlet 150; the second moving blade 240 is located at the inlet of the air collecting channel 140 141 (as shown in FIG. 3 a ), and are located on the upper and lower sides of the stator blade 130 with the first rotor blade 230 .

In addition, with reference to Figures 2a and 3a, the second frame 120 forms a wall surface 121, which extends toward the entrance 141, so as to divide the flow channel in the fan frame 100 into two, that is, to form a collecting flow channel 140 and the air to pass through. The flow path of the moving and static leaves.

Moreover, since the second rotor blade part 220 is provided with an upwardly hooked flange 221 , the airflow can be smoothly introduced upward into the air collecting channel 140 , so in the axial direction of the fan blade structure 200 (that is, the axial direction of the rotating device 300 ), the height of the collecting flow channel 140 can partially or completely overlap with the height of the moving and stationary blade flow channels, thereby making the centrifugal fan 2 as a whole miniaturized.

Figure 4 is a comparison diagram of the air pressure and air volume characteristics of the centrifugal fan in this case and the known centrifugal fan shown in Figure 1, wherein the horizontal axis is the air volume, the vertical axis is the wind pressure, and the solid line represents the air volume and air pressure relationship curve of the centrifugal fan in this case , The dotted line represents the air volume and pressure relationship curve of the known centrifugal fan; as shown in Figure 4, under the same air volume, the centrifugal fan of this case can get a larger wind pressure, so this case can indeed achieve the desired effect.

As mentioned above, since the present invention adds a set of moving and stationary blades above the original blades of the centrifugal fan, the wind pressure of the centrifugal fan can be effectively increased thereby.

Also, in the illustration, only one group of moving and stationary blades is added in the centrifugal fan of the present invention, but it is not limited thereto, and more than one group of moving blades or stationary blades can be added depending on the situation; Two sets of stator blades are formed on the fan, that is, a plurality of first stator blades and a plurality of second stator blades can be formed at the two air inlets of the fan frame respectively, and in the fan blade structure, in addition to the above-mentioned first moving blades and In addition to the second rotor blades, another group of rotor blades (a plurality of third rotor blades) can be added, and the above-mentioned stationary blades and rotor blades are arranged in a staggered manner as in the above-mentioned embodiment.

It is worth noting that the design concept of the centrifugal fan of the present invention adopts one or more groups of moving blades or stationary blades, and uses the additional stationary blades on the fan frame to direct the air flow to prevent cyclones, thereby achieving the purpose of increasing wind pressure and enhancing heat dissipation Effect.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the scope of the appended patent application.

Claims (43)

1. A centrifugal fan containing stationary blades, comprising: A fan frame, on which a plurality of stationary vanes are formed, the fan frame has an air inlet and an air outlet, a wall surface extends inwardly from the air inlet of the fan frame, and a collector is formed between the wall surface and the fan frame wall the airflow channel; and A fan blade structure is arranged in the fan frame and has a plurality of first rotor blades and a plurality of second rotor blades; The air collecting channel has an inlet, and the wall extends radially toward the inlet. 2. The centrifugal fan according to claim 1, wherein the first moving blades are located near the air inlet. 3. The centrifugal fan of claim 2, wherein the second rotor blades are located near the inlet. 4 . The centrifugal fan according to claim 3 , wherein the fan blade structure has a flange near the inlet, and the flange extends toward the air collecting channel. 5 . 5. The centrifugal fan according to claim 3, characterized in that, the air collecting passage and the passages of the moving blades and stationary blades are formed in the fan frame. 6. The centrifugal fan according to claim 3, wherein the cross-sectional area of the air-collecting channel is substantially equal to the cross-sectional area of the air outlet. 7 . The centrifugal fan according to claim 2 , wherein the first rotor blades respectively have a slope on a side close to the air inlet. 8 . 8. The centrifugal fan according to claim 1, characterized in that, the fan frame comprises: the first frame is used to set the blade structure; and The second frame is combined with the first frame, wherein the vanes are formed on the second frame. 9. The centrifugal fan according to claim 8, further comprising: A rotating device is arranged on the first frame to drive the blade structure. 10. The centrifugal fan according to claim 1, wherein the fan blade structure comprises: a first bucket section having the first buckets; and The second rotor blade unit is combined with the first rotor blade unit and has the second rotor blades. 11. The centrifugal fan according to claim 10, characterized in that, the second rotor blade part has a flange. 12. The centrifugal fan according to claim 1, characterized in that, the first moving blades and the second moving blades are respectively located on two sides of the stationary blades. 13. A centrifugal fan containing stators, comprising: first frame; A second frame, on which a plurality of vanes are formed, a wall surface extending inward from an air inlet of the second frame, and an air collecting channel is formed between the first frame and the second frame; a rotating device arranged on the first frame; a first bucket part, combined with the rotating device, and having a plurality of first buckets; and The second moving blade part is combined with the first moving blade part and has a plurality of second moving blades, wherein the first moving blades and the second moving blades are respectively located on both sides of the stationary blades; a vent; Wherein, the flow collecting channel has an inlet, and the wall extends radially toward the inlet. 14. The centrifugal fan according to claim 13, wherein the second frame is located near the air inlet. 15. The centrifugal fan according to claim 14, characterized in that, the first moving blades respectively form an inclined surface on a side close to the air inlet. 16 . The centrifugal fan according to claim 15 , wherein a flange is formed near the inlet of the second rotor blade portion, and the flange extends toward the air collecting channel. 17 . 17. The centrifugal fan according to claim 15, characterized in that, a wall extends towards the inlet to form the collector flow passage and the flow passages of the moving blades and stationary blades in the fan frame. 18. A centrifugal fan containing stationary blades, comprising: A fan frame, on which a plurality of stationary vanes are formed, the fan frame has an air inlet and an air outlet, and a wall surface extends inwardly from the air inlet of the fan frame, and a wall surface is formed between the wall surface and the fan frame wall a flow collection channel, and the flow collection channel has an inlet, and the wall extends radially toward the inlet; and A fan blade structure is arranged in the fan frame and has a flange, a plurality of first rotor blades and a plurality of second rotor blades, wherein the first rotor blades and the second rotor blades are respectively located on the stationary blades two sides, and the flange is located close to the inlet and extends toward the direction of the air collecting channel. 19. The centrifugal fan according to claim 18, wherein the first moving blades are located near the air inlet. 20. The centrifugal fan according to claim 19, characterized in that, each of the first moving blades has an inclined surface on a side close to the air inlet. 21. The centrifugal fan according to claim 19, wherein the cross-sectional area of the air-collecting channel is substantially equal to the cross-sectional area of the air outlet. 22. The centrifugal fan of claim 18, wherein the second buckets are located near the inlet. 23. The centrifugal fan according to claim 18, characterized in that, the wall extends towards the inlet to form the collector flow passage and the flow passages of the moving blades and stationary blades in the fan frame. 24. The centrifugal fan according to claim 18, characterized in that, the fan frame comprises: a first frame for setting the blade structure therein; and The second frame is combined with the first frame, wherein the vanes are formed on the second frame. 25. The centrifugal fan of claim 24, further comprising: A rotating device is arranged on the first frame to drive the blade structure. 26. The centrifugal fan according to claim 18, wherein the blade structure comprises: a first bucket section having the first buckets; and The second rotor blade unit is combined with the first rotor blade unit and has the second rotor blades. 27. The centrifugal fan according to claim 26, wherein the flange is formed on the second rotor blade portion. 28. A centrifugal fan containing stators, comprising: A fan frame, on which a plurality of stationary vanes are formed, the fan frame has an air inlet and an air outlet, and a wall surface extends inwardly from the air inlet of the fan frame, and between the wall surface and the fan frame wall forming a collecting flow channel; and A fan blade structure is arranged in the fan frame and has a plurality of first rotor blades and a plurality of second rotor blades, wherein the first rotor blades and the second rotor blades are respectively located on both sides of the stator blades; wherein , the flow collecting passage has an inlet, and the wall extends radially toward the inlet. 29. The centrifugal fan according to claim 28, wherein the first moving blades are located near the air inlet. 30. The centrifugal fan according to claim 29, wherein the cross-sectional area of the air-collecting channel is substantially equal to the cross-sectional area of the air outlet. 31. The centrifugal fan according to claim 29, characterized in that, each of the first rotor blades has an inclined surface on a side close to the air inlet. 32. The centrifugal fan of claim 28, wherein the second buckets are located near the inlet. 33 . The centrifugal fan according to claim 32 , wherein the fan blade structure forms a flange near the inlet, and the flange extends toward the air-collecting channel. 34 . 34. The centrifugal fan according to claim 32, characterized in that, the wall extends towards the inlet to form the collector flow passage and the flow passages of the moving blades and stationary blades in the fan frame. 35. The centrifugal fan according to claim 28, characterized in that, the fan frame comprises: the first frame is used to set the blade structure; and The second frame is combined with the first frame, wherein the vanes are formed on the second frame. 36. The centrifugal fan of claim 35, further comprising: A rotating device is arranged on the first frame to drive the blade structure. 37. The centrifugal fan according to claim 28, wherein the blade structure comprises: a first bucket section having the first buckets; and The second rotor blade unit is combined with the first rotor blade unit and has the second rotor blades. 38. The centrifugal fan according to claim 37, wherein a flange is formed on the second rotor blade portion. 39. A centrifugal fan comprising stationary blades, comprising: A fan frame, on which a plurality of stationary vanes are formed, the fan frame has an air inlet and an air outlet, a wall surface extends inwardly from the air inlet of the fan frame, and a collector is formed between the wall surface and the fan frame wall the airflow channel; and A fan blade structure is arranged in the fan frame and has at least one set of moving blades. The air collecting channel has an inlet, and the wall extends radially toward the inlet. 40. The centrifugal fan according to claim 39, wherein the stator blades and the moving blades are arranged in a staggered manner. 41. A fan frame, suitable for a centrifugal fan, wherein the centrifugal fan has a blade structure, and the fan frame forms a plurality of stator blades on the side facing the blade structure; and the fan frame has a an air inlet and an air outlet, and a wall surface extends inwardly from the air inlet, and an air collecting channel is formed between the wall surface and the fan frame wall; Wherein, the flow collecting channel has an inlet, and the wall extends radially toward the inlet. 42. The fan frame according to claim 41, further comprising: a first frame for accommodating the blade structure; and The second frame is combined with the first frame, wherein the vanes are formed on the second frame. 43. The fan frame according to claim 42, characterized in that, the second frame forms the wall surface, which extends toward the entrance of the air collecting channel, so as to form the air collecting channel and the static channels in the fan frame. Leaf runner.

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