CN101004177A - Centrifugal fan and its fan frame - Google Patents

Abstract

A fan frame comprises a first frame body, a second frame body and a partition part. The first frame body is provided with at least one first opening, the second frame body is provided with a bottom plate and a shaft sleeve part, and the bottom plate is provided with at least one second opening. The partition part is arranged between the first frame body and the second frame body, and one end of the partition part is connected with the first frame body and/or the second frame body to form two independent air flow channels. The invention also discloses a centrifugal fan which is provided with the fan frame.

Description

Centrifugal fan and its fan frame

technical field

The invention relates to a centrifugal fan, in particular to a centrifugal fan with multiple air outlets.

Background technique

With the rapid development of electronic products towards high performance, high frequency, high speed and thinness, the heating temperature of electronic products is getting higher and higher, which is prone to instability and affects product reliability. Therefore, existing electronic products are often Use a fan as a heat sink.

Referring to FIG. 1 , a known centrifugal fan 1 includes a fan frame 11 , an impeller 12 and a motor (not shown). The fan frame 11 has a single air inlet 111 and a single air outlet 112 . The impeller 12 is arranged in the fan frame and has a hub 121 and a plurality of fan blades 122 . The motor is arranged in the hub 121 and is connected to and drives the impeller 12 to rotate. When the impeller 12 rotates, air enters from the air inlet 111 , is pushed by the fan blades 122 and then flows out from the air outlet 112 .

The known centrifugal fan mainly relies on centrifugal force, so compared with the axial flow fan, the wind pressure is higher and the air volume is smaller. In order to improve the heat dissipation efficiency, the known technology uses a double-sided centrifugal fan to increase the air intake area, so that the air volume is increased. . However, due to the different air inlet conditions on both sides and only a single air outlet during operation, the airflow will interfere with each other after entering the channel and affect the heat dissipation effect. For example, the ambient temperature of the air inlet on one side is 30°C, and the ambient temperature of the air inlet on the other side is 40°C. After entering the channel, the air flows mix with each other, causing the temperature of the air outlet to rise (between 30°C and 40°C), thus affecting the heat dissipation effect. .

Therefore, how to provide a centrifugal fan and its fan frame to increase the air intake and improve the efficiency of the fan is one of the current important issues.

Invention content.

In view of the above problems, the object of the present invention is to provide a centrifugal fan and its fan frame, which can increase the air volume and air outlet direction, improve the efficiency of the fan and enable the fan to be used flexibly.

Therefore, to achieve the above object, a fan frame according to the present invention has a first frame body, a second frame body and a partition. The first frame body has at least one first opening, the second frame body has a bottom plate and a shaft sleeve portion, and the bottom plate has at least one second opening. The partition part is arranged between the first frame body and the second frame body, and one end thereof is connected with the first frame body and/or the second frame body to form two independent air flow passages.

To achieve the above object, a centrifugal fan according to the present invention includes a fan frame, an impeller and a motor. The fan frame has a first frame body, a second frame body and a partition, the first frame body has at least one first opening, the second frame body has a bottom plate and a shaft sleeve portion, the bottom plate has at least one second opening . The partition part is arranged between the first frame body and the second frame body, and one end thereof is connected with the first frame body and/or the second frame body to form two independent air flow passages. The impeller is arranged between the first frame body and the second frame body, and includes a hub, a plurality of first fan blades and a plurality of second fan blades, the first fan blades and the second fan blades are respectively arranged around the periphery of the hub, The first blade is adjacent to the first frame, the second blade is adjacent to the second frame, and the partition is located between the first blade and the second blade. The motor is arranged on the shaft sleeve, and is connected to and drives the impeller to rotate.

From the above, because a kind of centrifugal fan according to the present invention and its fan frame have two independent air passages, so can increase the air intake, improve fan efficiency, and the two independent air passages can be used flexibly (for example, different air volumes, Different air outlet directions, etc.) to provide cooling effects respectively.

Description of drawings

Figure 1 is a perspective view of a known centrifugal fan;

Fig. 2 is an exploded view of a centrifugal fan according to a preferred embodiment of the present invention;

3 is a perspective view of a centrifugal fan according to a preferred embodiment of the present invention;

4 is an exploded view of another centrifugal fan according to a preferred embodiment of the present invention; and

Fig. 5 is a perspective view of another centrifugal fan according to a preferred embodiment of the present invention.

Detailed ways

A centrifugal fan and its fan frame according to preferred embodiments of the present invention will be described below with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals.

Referring to FIG. 2 and FIG. 3 , a centrifugal fan 2 according to a preferred embodiment of the present invention includes a fan frame 21 , at least one impeller 22 and a motor 23 , and the fan frame 21 includes frame bodies 211 , 212 and a partition 213 . The motor 23 is disposed on the frame body 211 , 212 or the partition 213 . In this preferred embodiment, the motor 23 is disposed on the frame body 212 as an example for illustration, but it is not limited thereto.

The frame body 211 has an air inlet 2111, the frame body 212 has an air inlet 2124, the partition 213 is arranged between the frame bodies 211, 212, and is respectively connected with the frame bodies 211, 212 to form two independent airflow passages and two outlets. Tuyere 2112, 2125. The partition 213 and the frames 211 and 212 may be independent entities. The partition part 213 can also be integrally formed with the frame body 211 or the frame body 212 . The partition part 213 is, for example, a ring plate or a plate body with a ring wall.

The frame body 212 also has a bottom plate 2121 and a bushing portion 2122 , the bottom plate 2121 is connected to the bushing portion 2122 by at least one connecting portion 2123 to form an air inlet 2124 . The connection part 2123 may be a rib, a deflector or a vane. In addition, the sleeve portion 2122 can also be modified to be formed on the partition portion 213 as required, and at this time, only the air inlet 2124 needs to be formed on the bottom plate 2121 .

The impeller 22 is arranged in the fan frame 21 and includes a hub 221, at least one partition 222 and at least one fan blade 223, 224, wherein the fan blades 223, 224 are located at different axial positions, and respectively correspond to the above-mentioned two independent airflow passages . The partition 222 is connected to the hub 221 and located between the above two independent air passages. The fan blades 223 and 224 are disposed on two opposite surfaces of the partition plate 222 respectively. The fan blades 223, 224, the partition plate 222, and the hub 221 may be independent entities, or integrally formed. In addition, the side of the blades 223, 224 away from the hub 221 can be retracted, protruded or substantially flush with the outer peripheral edge of the partition 222, and the partition 222 is arranged corresponding to the partition 213 of the fan frame 21, so that the partition 213 is located between the fan blades 223 and 224, and the fan blades 223 and 224 respectively correspond to different airflow channels. Fan blades 223, 224 can be selected from a forward-leaning blade, a backward-leaning blade, a flat blade and combinations thereof, and the setting of fan blades 223, 224 can be equal or unequal, such as airfoil, quantity, spacing or inclination Angles and the like may be the same or different.

The motor 23 is connected to the shaft sleeve part 2122 to connect and drive the impeller 22 to rotate. Since the fan blades 223, 224, the air inlets 2111, 2124 and the air outlets 2112, 2125 belong to different airflow passages, when the motor 23 drives the impeller 22 to run, the airflow flowing in from the air inlet 2111 will be driven by the fan blades 223 While being discharged from the air outlet 2112 , the air flowing in from the air inlet 2124 will be driven by the fan blades 224 to be discharged from the air outlet 2125 . Since the above two air flows flow in different channels respectively, the two air flows will not affect each other.

In addition, the above-mentioned air outlets 2112, 2125 can make the air outlet directions of the air outlets 2112, 2125 the same (as shown in Figure 5) or different by adjusting the assembly position and shape of the frame body 211, 212 and the partition 213, For example, they are perpendicular to each other, opposite (as shown in FIG. 3 ), or form an angle. In this way, the fan 2 can dissipate heat for each required heat dissipation object according to actual needs.

Referring to FIG. 4 and FIG. 5 , another centrifugal fan 3 according to a preferred embodiment of the present invention includes a fan frame 31 , an impeller 32 and a motor 23 . The fan frame 31 includes two frame bodies 311 , 312 and a partition 313 , and the frame body 311 has an air inlet 3111 and an air outlet 3112 . The frame body 312 is connected with the frame body 311 and has an air outlet 3125 , a bottom plate 3121 and a shaft sleeve portion 3122 . The bottom plate 3121 is connected to the sleeve portion 3122 by a plurality of connecting portions 3123 and has an air inlet 3124 . The connection part 3123 may be a rib, a deflector or a vane.

The impeller 32 is disposed between the two frames 311 , 312 and includes a hub 321 , two partitions 322 , 323 and a plurality of fan blades 324 , 325 . The partitions 322 , 323 are connected to the hub 321 , and there is a gap between the partitions 322 , 323 . The partitions 322 , 323 are connected to the hub 321 , and the fan blades 324 , 325 are respectively arranged around the two surfaces of the partitions 322 , 323 that are far away from each other. The blades 324, 325, the partitions 322, 323, and the hub 321 can be independent entities, or integrally formed. In addition, the fan blades 324, 325 may be located at different axial positions, or may be located at the same axial position.

The partition 313 is located between the partitions 322 and 323 , and the partition 313 is connected to the frame body 311 and/or the frame body 312 . The motor 23 is connected with the shaft sleeve part 3122 to connect and drive the impeller 32 to rotate. In this way, when the motor 23 is running, two independent airflow passages can also be formed, so that the airflow in the fan will not affect each other.

The air outlets 3112 and 3125 can also adjust the air outlet directions to be the same or different by adjusting the assembly positions and shapes of the frames 311 , 312 and the partition 313 , such as being perpendicular to each other, opposite or at an angle. In addition, in this example, the sleeve part 3122 can also be modified to be formed on the partition part 313, so as to increase the air intake of the fan and increase the cooling effect.

In summary, because a centrifugal fan according to the present invention and its fan frame have two independent airflow passages, it can increase the air intake and improve the fan efficiency, and the two independent airflow passages can be used flexibly (such as different airflows, different airflows, etc.) air outlet direction, etc.) to provide cooling effects respectively.

The above description is for illustration only and not for limitation. Any equivalent modifications or changes made without departing from the spirit and scope of the present invention shall be included in the scope of the appended claims.

Claims (19)

1, a kind of centrifugal fan comprises:

One fan frame, have one first framework and one second framework, described first framework has at least one first wind inlet, described second framework has at least one second wind inlet, after described first framework and described second framework are assembled mutually, constitute two individual air stream passages, at least one first exhaust outlet and at least one second exhaust outlet; And

One impeller is arranged in the described fan frame, comprises at least one wheel hub, at least one first flabellum and at least one second flabellum, and described first flabellum and described second flabellum correspond respectively to described two individual air stream passages.

2, centrifugal fan as claimed in claim 1 also comprises a separating part, is arranged between first framework and second framework, and together constitutes individual air stream passage, first exhaust outlet and second exhaust outlet with first framework and second framework.

3, centrifugal fan as claimed in claim 2, the wherein said separating part and first framework are one-body molded, or one-body molded with second framework.

4, centrifugal fan as claimed in claim 2, wherein said separating part, first framework and second framework are the difference independent individual.

5, centrifugal fan as claimed in claim 2, wherein said separating part are ring flat-plate or the plate body with ringwall.

6, centrifugal fan as claimed in claim 1 or 2 also comprises a motor, connect and drives impeller, and this motor is arranged on first framework, second framework or the separating part.

7, centrifugal fan as claimed in claim 1, wherein said second framework has a base plate and a shaft sleeve part, and base plate has second wind inlet, and base plate is connected by at least one joint with shaft sleeve part.

8, centrifugal fan as claimed in claim 7, wherein said joint are rib, guide plate or stator blade.

9, centrifugal fan as claimed in claim 1, the air-out direction of wherein said individual air stream passage or air output are identical or inequality.

10, centrifugal fan as claimed in claim 1, wherein said wheel hub, first flabellum and second flabellum are indivedual independent individuals or one-body molded.

11, centrifugal fan as claimed in claim 1, wherein said impeller also comprises at least one dividing plate, is connected with wheel hub, first flabellum and second flabellum, dividing plate is between two individual air stream passages.

12, centrifugal fan as claimed in claim 11, wherein said dividing plate, wheel hub, first flabellum and second flabellum are difference independent individual or one-body molded.

13, centrifugal fan as claimed in claim 1, wherein said impeller also comprises one first dividing plate and a second partition, first dividing plate is connected with first flabellum with wheel hub, and second partition is connected with second flabellum with wheel hub, and first dividing plate and second partition are between two individual air stream passages.

14, centrifugal fan as claimed in claim 13, wherein said first dividing plate, second partition, wheel hub, first flabellum and second flabellum are difference independent individual or one-body molded.

15, centrifugal fan as claimed in claim 13 has a space between wherein said first dividing plate and the second partition.

16, centrifugal fan as claimed in claim 13 also comprises a separating part, is arranged between first dividing plate and the second partition, and is connected with second framework with first framework.

17, centrifugal fan as claimed in claim 1, aerofoil profile, quantity, spacing or the angle of inclination of wherein said first flabellum and second flabellum are equity or not reciprocity setting.

18, centrifugal fan as claimed in claim 1, the air-out direction of wherein said individual air stream passage be perpendicular to one another, oppositely or accompany an angle.

19, a kind of fan frame is applicable to a centrifugal fan, comprising:

One first framework has at least one first wind inlet; And

One second framework has at least one second wind inlet, after described first framework and described second framework are assembled mutually, constitutes two individual air stream passages, at least one first exhaust outlet and at least one second exhaust outlet.

Images