TWM540929U - Centrifugal fan - Google Patents

Abstract

A centrifugal fan includes a shell body and a fan. The shell body includes a first cover, a second cover, a sidewall, and a partition structure. The side wall connects between the first cover and the second cover and surrounds to form an accommodating space, has at least one air intake and at least one air outlet. The partition structure is disposed between the first cover and the second cover to partition the accommodating space into a first subspace and a second subspace, and has a through hole therein. The first subspace communicates outside of the shell body through the first subspace. The second subspace communicates outside of the shell body through the second subspace, and communicates with the first subspace through the through hole. The fan is rotatably disposed in the first subspace.

Description

Centrifugal fan

The present disclosure relates to a centrifugal fan.

In general, in order to prevent the electronic components inside the computer host from overheating, the electronic components are abnormal. Generally, the temperature of the power supply, central processing unit (CPU), and graphics processing unit (GPU) of the computer is easily increased. A fan is disposed on the electronic component to dissipate heat from the electronic component to remove thermal energy generated by the electronic component during operation. However, due to the trend of miniaturization of the internal space of the host computer, the fan structure configuration and overall performance are limited.

According to an embodiment of the present disclosure, a centrifugal fan includes a housing and a fan wheel. The housing includes a first cover, a second cover, a side wall structure, and a partition structure. The side wall structure is connected between the first cover plate and the second cover plate to surround the accommodating space, and has at least one first air inlet and at least one air outlet. The partition structure is located between the first cover plate and the second cover plate to partition the accommodating space into the first subspace and the second subspace, and has a first through hole. The first subspace is communicated to the outside of the housing via the air outlet. The second subspace communicates to the outside of the housing via the first air inlet and is connected to the first subspace via the first through hole. The fan wheel is rotatably disposed in the first subspace.

1, 2, 3‧‧‧ Centrifugal fans

10‧‧‧shell

12‧‧‧fan wheel

24‧‧‧ Guide channel

100‧‧‧ first cover

102‧‧‧second cover

104‧‧‧Side wall structure

104a‧‧‧Lower side wall structure

104b‧‧‧Upper side wall structure

104c‧‧‧ tongue

104d‧‧‧Rings

106, 306‧‧‧ partition structure

106a‧‧‧ring edge

106b‧‧‧Line edge

120‧‧‧ hub

122‧‧‧ fan leaves

122‧‧‧blade edge

240‧‧‧First guiding side wall

242‧‧‧Second guiding side wall

244‧‧‧ openings

246‧‧‧ lower guide cover

248‧‧‧Upper guide cover

250‧‧‧Guide space

1000‧‧‧ third air inlet

1020‧‧‧second air inlet

1040‧‧‧first air inlet

1042‧‧‧air outlet

1044‧‧‧ accommodating space

1046‧‧‧First subspace

1046a‧‧‧First airflow channel

1046b, 3046b‧‧‧second airflow channel

1048‧‧‧Second subspace

1060‧‧‧through hole

1062, 3062‧‧‧ recessed

1064‧‧‧ side wall

1066, 3066‧‧‧ bottom

3062a‧‧‧First step

3062b‧‧‧second step

3062c‧‧‧ third step

A-A, B-B, C-C, D-D‧‧‧ segments

D1, D2, T1, T2, T3‧‧‧ distance

L1, L2, W1, W2‧‧‧ width

X, Y, Z‧‧ Direction

The above and other objects, features, advantages and embodiments of the present disclosure will be more apparent and understood. The description of the drawings is as follows: FIG. 1 is a perspective view of a centrifugal fan according to some embodiments of the present disclosure.

2 is an exploded view of a centrifugal fan in accordance with some embodiments of the present disclosure.

FIG. 3 is a perspective view of a centrifugal fan according to some embodiments of the present disclosure, wherein the centrifugal fan further includes a guiding passage relative to FIG. 1 .

4A to 4D are perspective cross-sectional views along line A-A, line B-B, line C-C, and line D-D, respectively, in FIG.

FIG. 5A is a perspective view of a centrifugal fan according to some other embodiments of the present disclosure.

Fig. 5B is a cross-sectional view showing a part of the structure along the line segment 5B-5B in Fig. 3, respectively.

Please refer to Figure 1 and Figure 2. FIG. 1 is a perspective view of a centrifugal fan 1 according to an embodiment of the present disclosure. Fig. 2 is an exploded view of the centrifugal fan 1 in Fig. 1. The centrifugal fan 1 includes a housing 10 and a fan wheel 12. The housing 10 includes a first cover plate 100, a second cover plate 102, a side wall structure 104, and a partition structure 106.

In the first and second figures, the side wall structure 104 is connected between the first cover 100 and the second cover 102, substantially perpendicular to the first cover 100 and the second cover 102, and is formed around the cover plate. Set the space 1044 (please refer to Figure 4D). The partition structure 106 is located between the first cover plate 100 and the second cover plate 102 to divide the side wall structure 104 into the lower side wall structure 104a and the upper side wall structure 104b, and the accommodation space 1044 is divided into a first subspace 1046 and a second subspace 1048. The lower sidewall structure 104a is located on a side of the sidewall structure 104 away from the second cover 102 and is connected between the first cover 100 and the partition structure 106. The upper sidewall structure 104b is located on a side of the sidewall structure 104 away from the first cover 100 and is connected between the second cover 102 and the partition structure 106. In detail, the first subspace 1046 is defined by a space surrounded by the first cover 100, the partition structure 106, and the lower sidewall structure 104a. The second subspace 1048 is defined by a space enclosed by the second cover 102, the partition structure 106, and the upper sidewall structure 104b.

In the first and second figures, the side wall structure 104 has a first air inlet 1040 and an air outlet 1042, but the disclosure is not limited thereto. In some embodiments, the number of air inlets and air outlets may be multiple. In addition, the first air inlet 1040 is formed in the upper side wall structure 104b of the side wall structure 104. The air outlet 1042 is opened in the lower side wall structure 104a of the side wall structure 104.

In the present embodiment, the partition structure 106 is integrally formed with the side wall structure 104. The partition structure 106 also includes an annular rim 106a. The side wall structure 104 further includes a tongue portion 104c and an annular portion 104d. The annular edge 106a of the partition structure 106 is located below the first air inlet 1040, and is located at the edge of the first air inlet 1040 adjacent to the first cover 100 and surrounds the accommodating space 1044. The tongue portion 104c of the side wall structure 104 is located between the first air inlet 1040 and the air outlet 1042, is adjacent to the air outlet 1042, and protrudes toward the accommodating space 1044. The annular portion 104d is a portion of the lower sidewall structure 104a, located below the first air inlet 1040, and surrounding the first subspace 1046 of the accommodating space 1044.

The first air inlet 1040 of the present embodiment is disposed between the partition structure 106 and the second cover plate 102 along the direction Z, and is opened in the upper side wall structure 104b along the annular edge 106a of the partition structure 106. One end of the portion 104c and away from Between the other ends of the tongue 104c. In the foregoing configuration, the first air inlet 1040 has a partially annular opening, which is located above the annular portion 104d of the side wall structure 104, and the opening contour of the first air inlet 1040 conforms to the annular shape of the annular portion 104d. surface. In an embodiment, the opening width of the first air inlet 1040 in the direction Z may be designed according to the requirements of the actual application, and the opening range of the first air inlet 1040 along the annular edge 106a of the partition structure 106 is designed. . In addition, the position of the first air inlet 1040 on the upper side wall structure 104b may also be configured according to the requirements in practical applications.

The air outlet 1042 in the present embodiment is disposed relative to the first air inlet 1040, and is disposed between the partition structure 106 and the first cover 100 along the direction Z, and opens along the straight edge 106b of the partition structure 106 on the lower side. One end of the wall structure 104a adjacent to the tongue 104c and the other end away from the tongue 104c. The first subspace 1046 of the accommodating space 1044 communicates to the outside of the casing 10 via the air outlet 1042 on the lower sidewall structure 104a. The second subspace 1048 of the accommodating space 1044 communicates to the outside of the housing 10 via the first air inlet 1040 on the upper sidewall structure 104b.

In the present embodiment, the partition structure 106 has a through hole 1060. The through hole 1060 has a substantially circular opening and is opened at a central portion of the partition structure 106. The through hole 1060 of the present embodiment is not limited to the aforementioned configuration. In other embodiments, any suitable configuration of vias can be applied to the present disclosure. The second subspace 1048 of the accommodating space 1044 is connected to the first subspace 1046 via the through hole 1060 on the partition structure 106. The fan wheel 12 of the present embodiment is rotatably disposed in the first subspace 1046 of the accommodating space 1044. The fan wheel 12 includes a hub 120 and a fan blade 122. The fan blades 122 of the fan wheel 12 cover the lower portion of the partition structure 106 and are located at the periphery of the through hole 1060.

Airflow outside the housing 10 can enter the second subspace 1048 in the housing 10 from the side of the housing 10 by the first air inlet 1040 on the upper sidewall structure 104b. Then, the airflow is passed from the second subspace through the through hole 1060 of the partition structure 106. 1048 enters a first subspace 1046 in the housing 10. Next, the airflow flows from the first subspace 1046 to the outside of the casing 10 by the air outlets 1042 located on the lower side wall structure 104a.

In the present embodiment, the second cover 102 has a second intake port 1020. The first cover 100 has a third intake port 1000. The first subspace 1046 of the accommodating space 1044 communicates to the outside of the casing 10 via the air outlet 1042 on the lower sidewall structure 104a, and communicates to the outside of the casing 10 via the third air inlet 1000 of the first cover 100. The second subspace 1048 of the accommodating space 1044 communicates to the outside of the housing 10 via the first air inlet 1040 on the upper sidewall structure 104b, and communicates to the housing 10 via the second air inlet 1020 of the second cover 102. outer. Therefore, the airflow can enter the casing 10 from the second intake port 1020 or the third intake port in the direction Z, thereby increasing the intake air amount and the air discharge amount of the centrifugal fan 1. In the present embodiment, the through hole 1060 of the partition structure 106 is opposite to the second air inlet 1020 of the second cover 102 and the third air inlet 1000 of the first cover 100.

Please refer to Figure 3. FIG. 3 is a perspective view of a centrifugal fan 2 according to an embodiment of the present disclosure. As shown in Fig. 3, the structure and function of the components such as the casing 10 and the fan wheel 12 included in the centrifugal fan 2 of the present embodiment, and the connection relationship between the components are as shown in Figs. 1 and 2 The centrifugal fan 1 is substantially the same and will not be described herein.

The difference between the present embodiment and the embodiment shown in FIG. 1 is that the centrifugal fan 2 further includes the guide passage 24 in the present embodiment. The guiding channel 24 includes a first guiding sidewall 240, a second guiding sidewall 242, a lower guiding cover 246 and an upper guiding cover 248. The height of the first guiding sidewall 240 and the second guiding sidewall 242 in the direction Z is substantially the same as the height of the sidewall structure 104 in the direction Z. One end of the first guiding side wall 240 and one end of the second guiding side wall 242 are respectively adjacent to the side wall junction The sides of the first air inlet 1040 on the structure 104 are disposed to extend away from the fan wheel 12.

The lower guiding cover 246 and the upper guiding cover 248 respectively extend away from the first wheel cover 100 and the second cover plate 102 in a direction away from the fan wheel 12, and are located at the first guiding side wall 240 and the second guiding Between the side walls 242. The first guiding sidewall 240, the second guiding sidewall 242, the lower guiding cover 246 and the upper guiding cover 248 are collectively surrounded to form a guiding space 250. The guide channel 24 has an opening 244. In the present embodiment, the second subspace 1048 of the housing 10 is communicated to the guiding space 250 of the guiding channel 24 via the first air inlet 1040 on the side wall structure 104, and further via the opening 244 of the guiding channel 24 Connected to the outside of the housing 10.

In FIG. 3, the partition structure 106 further includes a recess 1062 (please refer to FIG. 4C for reference). The recessed portion 1062 is formed by the partial partition structure 106 recessed toward the second cover plate 102, adjacent to the annular edge 106a of the partition structure 106. The first air inlet 1040 is formed between the bottom portion 1066 of the recess 1062 and the second cover plate 102. The number of the depressed portions of the present disclosure is not limited to one. In some embodiments, the number of recesses may be multiple.

In FIG. 3, the recessed portion 1062 includes two opposite side walls 1064 and a bottom portion 1066 connected between the two side walls 1064 (please refer to FIG. 4C for reference). The two side walls 1064 of the recessed portion 1062 (see FIG. 4C ) extend substantially perpendicular to the first cover plate 100 toward the second cover plate 102 and are respectively surrounded by the different distances with respect to the through hole 1060 of the partition structure 106 . Hole 1060. Therefore, in the present embodiment, the recessed portion 1062 surrounds the through hole 1060 of the partition structure 106.

Please refer to Figures 4A to 4D. 4A to 4D are perspective cross-sectional views along line A-A, line B-B, line C-C, and line D-D, respectively, in FIG. 3, wherein the line A-A of FIG. 3 is located under the recess 1062 of the partition structure 106. The line segment B-B of the third figure is located on the recess 1062 of the partition structure 106. The first cover 100 of the centrifugal fan 2 is omitted in FIG. 4C.

In FIG. 4A, the blade edge 1220 of the blade 122 has a spacing from the sidewall structure 104 to form a first airflow passage 1046a. The width of the first airflow passage 1046a increases from the tongue 104c adjacent the side wall structure 104 to away from the tongue 104c. In one embodiment, the distance between the blade edge 1220 and the sidewall structure 104 is one of the plurality of blades 122 that is closer to the tongue 104c than the width L1. In one of the plurality of blades 122 that is further away from the tongue 104, the distance between the blade edge 1220 and the side wall structure 104 is a width L2, and the width L2 is greater than the width L1.

When the hub 120 located in the first subspace 1046 rotates counterclockwise, the hub 120 drives the blades 122 of the fan wheel 12 to push the airflow so that the airflow flows around the hub 120. When the airflow flows through the first airflow passage 1046a, since the width of the first airflow passage 1046a gradually increases toward the direction in which the hub 120 rotates to increase the flow rate of the airflow, the resistance of the casing 10 to the airflow is reduced, so that part of the kinetic energy of the airflow is converted. For pressure energy (for example: dynamic pressure and static pressure). Then, the air flow is discharged from the first subspace 1046 outside the casing 10 by the air outlet 1042 of the lower side wall structure 104a.

In FIG. 4B, the partition structure 106 has a recess 1062. The two side walls 1064 and the bottom portion 1066 of the recess 1062 (see FIG. 4C) collectively form a second airflow passage 1046b. The second airflow passage 1046b is located above the first airflow passage 1046a. The second air flow passage 1046b formed by the recess 1062 of the partition structure 106 can provide a gas flow accommodating space to increase the flow rate of the airflow in the first subspace 1046, thereby increasing the intake air amount and the air output amount of the centrifugal fan 1. Thereby, the centrifugal fan 2 of the present embodiment can utilize the space perpendicular to the first cover plate 100 to increase the height of the air flow passage, thereby utilizing a limited space to improve the performance of the centrifugal fan 2.

The distance between the two side walls 1064 of the recess 1062 varies along the direction of rotation of the fan wheel 12. The width of the recess 1062 of the partition structure 106 increases from the tongue 104c adjacent the sidewall structure 104 to away from the tongue 104c. In one embodiment, the distance between the two side walls 1064 of the recessed portion 1062 near the tongue portion 104c is the width W1, and the distance between the two side walls 1064 of the recessed portion 1062 away from the tongue portion 104c is the width W2, and the width W2 is greater than the width. W1. Therefore, when the airflow flows through the second airflow passage 1046b located in the recessed portion 1062, since the width of the second airflow passage 1046b gradually increases toward the direction in which the hub 120 rotates to increase the flow rate of the airflow, the airflow of the casing 10 is lowered. Resistance causes some of the kinetic energy of the airflow to be converted into pressure energy (eg, dynamic and static pressure). Then, the air flow can be quickly discharged from the first subspace 1046 outside the casing 10 by the air outlet 1042 of the lower side wall structure 104a.

In FIG. 4C, the bottom portion 1066 of the recess 1062 of the partition structure 106 is located between the two side walls 1064, and the distance between the bottom portion 1066 of the recess portion 1062 and the first cover plate 100 is gradually changed.

In an embodiment, the bottom portion 1066 of the recess portion 1062 and the first cover plate 100 are separated from the tongue portion 104c (see FIG. 4B) by a distance D1, and the bottom portion 1066 of the recess portion 1062 and the first cover plate 100 are The distance from the tongue 104c is a distance D2, and the distance D2 is greater than the distance D1. Therefore, when the airflow flows through the second airflow passage 1046b located in the recessed portion 1062, since the distance of the second airflow passage 1046b with respect to the first cover plate 100 gradually increases toward the direction in which the hub 120 rotates, the flow rate of the airflow is increased, thereby The resistance of the housing 10 to the airflow is reduced such that a portion of the kinetic energy of the airflow is converted to pressure energy (eg, dynamic and static pressure). Then, the air flow can be quickly discharged from the first subspace 1046 outside the casing 10 by the air outlet 1042 of the lower side wall structure 104a.

In FIG. 4D, the airflow outside the housing 10 can be guided through the guide channel. The opening 244 of the 24 is directed to the guiding space 250 in the guiding channel 24. The airflow enters the second subspace 1048 in the housing 10 from the guide space 250 via the first air inlet 1040 on the upper sidewall structure 104b (see FIG. 3). The airflow enters the first subspace 1046 in the housing 10 from the second subspace 1048 by the through hole 1060 of the partition structure 106. The airflow flows from the first subspace 1046 to the outside of the housing 10 by the air outlets 1042 located on the lower side wall structure 104a. In the present embodiment, the air flow may also enter the housing 10 from the second air inlet 1020 or the third air inlet in the direction Z, thereby increasing the intake air amount and the air output amount of the centrifugal fan 2.

Please refer to Figures 5A and 5B. FIG. 5A is a perspective view of the centrifugal fan 3 according to some other embodiments of the present disclosure. Fig. 5B is a cross-sectional view showing a portion of the structure along line 5B-5B of Fig. 5A, respectively. As shown in the figure, the structure and function of the components such as the casing 10 and the fan wheel 12 included in the centrifugal fan 3 of the present embodiment, and the connection relationship between the components are the same as those of the centrifugal fan 2 shown in FIG. It is roughly the same and will not be described here.

The difference between this embodiment and the embodiment shown in FIG. 3 is that in the present embodiment, the distance between the bottom portion 3066 of the recess portion 3062 of the partition structure 306 of the centrifugal fan 3 and the first cover 100 is far away. The direction of the tongue 104c increases in a stepwise manner.

The recessed portion 3062 of the present embodiment sequentially has a first stepped portion 3062a, a second stepped portion 3062b, and a third stepped portion 3062c in a direction away from the tongue portion 104c. The bottom of the first step portion 3062a and the first cover 100 are separated by a distance T1. The bottom of the second step portion 3062b is spaced from the first cover plate 100 by a distance T2. The bottom of the third step portion 3062c is spaced apart from the first cover plate 100 by a distance T3. The distance T3 is greater than the distance T2, and the distance T2 is greater than the distance T1. When the airflow flows through the second airflow passage located in the recess 3062, due to the second The distance of the air flow passage relative to the first cover plate 100 increases in a stepwise direction in which the fan hub 120 rotates to increase the flow rate of the air flow. The present disclosure is not limited to the foregoing configuration, and may be applied to the present disclosure as long as the bottom surface of the recess portion has a suitable plurality of different distances relative to the first cover plate 100 in a direction away from the tongue portion 104c. In an embodiment, the bottom surface of the recess portion may be a plane, a slope or a curved surface with respect to the first cover plate 100, and may have a plurality of gradually increasing distances relative to the first cover plate 100 in a direction away from the tongue portion 104c. .

The features of the foregoing embodiments are provided to enable those of ordinary skill in the art to have a better understanding of the various aspects of the invention, and those of ordinary skill in the art should understand that, in order to achieve the same purpose and/or The same advantages of the embodiments can be easily utilized to further design or modify other processes and structures, and those having ordinary skill in the art should understand that the same structures do not depart from the spirit and scope of the present invention. It is possible to make various changes, substitutions and amendments here without departing from the spirit and scope of the case.

1‧‧‧ centrifugal fan

10‧‧‧shell

12‧‧‧fan wheel

100‧‧‧ first cover

102‧‧‧second cover

104‧‧‧Side wall structure

104a‧‧‧Lower side wall structure

104b‧‧‧Upper side wall structure

104c‧‧‧ tongue

104d‧‧‧Rings

106‧‧‧Separate structure

106a‧‧‧ring edge

106b‧‧‧Line edge

120‧‧‧ hub

122‧‧‧ fan leaves

1000‧‧‧ third air inlet

1020‧‧‧second air inlet

1040‧‧‧first air inlet

1042‧‧‧air outlet

1044‧‧‧ accommodating space

1046‧‧‧First subspace

1048‧‧‧Second subspace

1060‧‧‧through hole

1062‧‧‧Depression

1064‧‧‧ side wall

1066‧‧‧ bottom

X, Y, Z‧‧ Direction

Claims (10)

A centrifugal fan includes: a casing, comprising: a first cover; a second cover; a side wall structure connected between the first cover and the second cover to form an accommodation a space having at least one first air inlet and at least one air outlet; and a partition structure located in the accommodating space; wherein the first air inlet is connected to the air outlet through the partition structure; and a fan wheel Provided between the partition structure and the first cover. The centrifugal fan of claim 1, wherein the partitioning structure divides the accommodating space into a first subspace and a second subspace, and has a through hole, and the first subspace is connected to the vent through the vent Outside the housing, the second subspace communicates to the outside of the housing via the first air inlet, and is connected to the first subspace via the through hole. The centrifugal fan of claim 2, further comprising a guiding channel connected to the side wall structure and having an opening, wherein the second subspace is connected to the first air inlet via the first air inlet Guide channel. The centrifugal fan of claim 3, wherein the guiding channel comprises a first guiding side wall and a second guiding side wall, the first One end of the guiding side wall and one end of the second guiding side wall are respectively adjacent to both sides of the first air inlet, and are disposed to extend away from the fan wheel. The centrifugal fan according to claim 1, wherein a part of the partitioning structure is recessed toward the second cover plate to form at least one recessed portion, the recessed portion being located between an edge of the fan wheel and the side wall structure. The centrifugal fan of claim 5, wherein the recess comprises two opposite side walls and a bottom portion connected between the two side walls. The centrifugal fan of claim 6, wherein the distance between the two side walls varies along a direction of rotation of the one of the fan wheels. The centrifugal fan of claim 6, wherein the distance between the at least two portions of the bottom and the first cover is different. The centrifugal fan of claim 8, wherein the distance between the bottom and the first cover is gradual. The centrifugal fan of claim 8, wherein the distance between the bottom portion and the first cover plate changes stepwise.