CN113672058A

CN113672058A - Centrifugal cooling fan and cooling system of electronic device

Info

Publication number: CN113672058A
Application number: CN202010401958.7A
Authority: CN
Inventors: 陈宗廷; 廖文能; 谢铮玟; 林育民; 陈伟今; 王俊杰; 郭书豪
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-11-19

Abstract

The invention provides a centrifugal cooling fan and a cooling system of an electronic device, wherein the centrifugal cooling fan comprises a shell and an impeller. The shell is provided with at least one air inlet arranged along the shaft and a plurality of air outlets positioned on different radial directions. The impeller is disposed within the housing along the shaft.

Description

Centrifugal cooling fan and cooling system of electronic device

Technical Field

The present invention relates to heat dissipation fans and heat dissipation systems, and particularly to a centrifugal heat dissipation fan and a heat dissipation system of an electronic device.

Background

Generally, to improve the heat dissipation effect in the notebook computer, it is not necessary to reduce the thermal resistance of the system or improve the performance of the heat dissipation fan therein. However, the notebook computer tends to be light and thin and does not like too many heat dissipation holes, which results in a larger thermal resistance of the system, and further reduces the air suction volume of the heat dissipation fan, so that the air in the external environment is not easy to enter the system to generate the heat convection required by heat dissipation.

Meanwhile, the air gap between the blades of the existing centrifugal fan is large, so that the air flow is not easy to control and backflow is easy to cause, the air pressure is insufficient, and the heat dissipation efficiency is influenced. Moreover, once the air inlet is increased to increase the air inlet amount, if the fan blades are not provided with corresponding structures, air leakage and the like are easily caused.

In addition, since the design trend of electronic devices (such as notebook computers or tablet computers) is gradually towards being light and thin, the heat dissipation fan installed therein is also required to be thin when the internal space is extremely limited, and thus the airflow of the heat dissipation fan cannot smoothly enter and exit the heat dissipation fan when the space is limited, thereby affecting the heat dissipation efficiency.

Based on the above, under the existing situation of thermal resistance of the existing system, it is necessary to provide an effective lifting means for at least one of the wind pressure and the wind volume of the cooling fan, so as to effectively solve the above problems.

Disclosure of Invention

The invention is directed to a centrifugal heat dissipation fan and a heat dissipation system of an electronic device, wherein the centrifugal heat dissipation fan is provided with air outlets in different radial directions so as to facilitate forming the heat dissipation system with better heat dissipation efficiency in the electronic device.

According to an embodiment of the present invention, a centrifugal heat dissipation fan includes a housing and an impeller. The shell is provided with at least one air inlet arranged along the shaft and a plurality of air outlets positioned on different radial directions. The impeller is disposed within the housing along the shaft.

According to an embodiment of the present invention, a heat dissipation system of an electronic device includes a housing, a plurality of heat sources disposed in the housing, and at least one centrifugal fan. The centrifugal heat radiation fan comprises a shell and an impeller. The shell is provided with at least one air inlet arranged along the shaft and a plurality of air outlets positioned on different radial directions, and the air outlets respectively correspond to a plurality of heat sources. The impeller is disposed within the housing along the shaft.

Based on the above, since the casing of the centrifugal heat dissipation fan has the plurality of air outlets located in different radial directions, the casing of the centrifugal heat dissipation fan can be optimally configured according to the position of the heat source in the body of the electronic device, which breaks the design concept of the centrifugal heat dissipation fan in the prior art, and after the air flow is sucked into the casing from the axial inlet, the air flow can be respectively discharged from the different air outlets in the rotation driving process of the impeller. The air outlets can respectively correspond to and provide and guide the required airflow to the heat source or the object to be radiated, thereby effectively improving the radiation efficiency of the centrifugal radiation fan in the machine body.

Drawings

Fig. 1 is an exploded view of a centrifugal heat dissipating fan according to an embodiment of the present invention;

fig. 2 is a top view of the centrifugal radiator fan of fig. 1;

fig. 3 to 6 are schematic views of centrifugal heat dissipation fans according to different embodiments of the present invention;

fig. 7 and 8 are simplified schematic diagrams of heat dissipation systems of electronic devices according to different embodiments of the present invention.

Detailed Description

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

Fig. 1 is an exploded view of a centrifugal heat dissipating fan according to an embodiment of the present invention. Fig. 2 is a top view of the centrifugal heat dissipation fan of fig. 1, and fig. 2 omits a part of components of fig. 1 to facilitate recognition of the inside of the centrifugal heat dissipation fan. Orthogonal coordinates X-Y-Z are provided herein to facilitate component description. Referring to fig. 1 and fig. 2, the centrifugal heat dissipation fan 100 includes a housing 110 and an impeller 120. The casing 110 has at least one air inlet (here, two air inlets E1, E2 are taken as an example) arranged along the axis L1 and a plurality of air outlets located in different radial directions and separated from each other. Impeller 120 is disposed within housing 110 along axis L1. It should be noted that the driving method of the centrifugal heat dissipation fan 100 (for example, the motor is connected to the impeller 120 to drive the impeller to rotate) is known in the prior art, and thus the description thereof is omitted here for brevity. When the impeller 120 rotates around the axis L1 in the casing 110, airflow is generated to enter the casing 110 from the air inlets E1 and E2, and then flow out of the casing 110 from the radial air outlets respectively.

In the embodiment, the casing 110 includes an upper cover 111, a base 112 and

side wall structures

113, 114 and 115, wherein the upper cover 111 has an air inlet E1, the base 112 has an air inlet E2, and the

side wall structures

113, 114 and 115 are connected between the upper cover 111 and the base 112 to form air outlets in different radial directions with the upper cover 111 and the base 112. The separated outlets are respectively defined as a first main outlet E3, a second main outlet E4 and an auxiliary outlet E5, and the side wall structure 113 of the casing 110 has an inner wall tongue T1 adjacent between the first main outlet E3 and the auxiliary outlet E5, and therefore, in the rotation direction D1 of the impeller 120, the inner wall tongue T1, the auxiliary outlet E5, the second main outlet E4 and the first main outlet E3 are sequentially adjacent to each other and disposed in a counterclockwise circulation.

Moreover, the first main air outlet E3 and the second main air outlet E4 are planar air outlets, and the auxiliary air outlet E5 is a cambered air outlet. Moreover, the sum of the area A3 of the first main outlet E3 and the area a4 of the second main outlet E4 is greater than the area a5 of the auxiliary outlet E5 (A3+ a4> a5), wherein the air outlet radial direction R1 of the first main outlet E3 and the air outlet radial direction R2 of the second main outlet E4 are orthogonal to each other. As shown in fig. 2, the air outlet radial direction R1 is substantially toward the negative Y-axis direction, the air outlet radial direction R2 is substantially toward the negative X-axis direction, and the air outlet direction of the secondary outlet E5 includes a plurality of different radial directions. In other words, the secondary outlet E5 of the present embodiment has a radial outlet direction R3 at its starting point ST (corresponding to the beginning of the secondary outlet E5 with the inner wall tongue T1) that faces substantially the positive X-axis direction, and has a radial outlet direction R4 at its ending point EN that faces substantially the positive Y-axis direction, so that the outlet range of the secondary outlet E5 is substantially enlarged to a circumferential angle of 90 degrees. In other words, the sub-outlet E5 of the centrifugal fan 100 of the present embodiment substantially has the

sidewall structures

113 and 115 as the beginning and end structures of the outlet range.

Based on the above, in the case that the housing 110 is configured according to the above structure, and the first main air outlet E3 and the second main air outlet E4 are already present, the auxiliary air outlet E5 is further formed on the arc-shaped side surface thereof, so that the centrifugal heat dissipating fan 100 can have an additional flow guiding path for the heat dissipating air flow, and under the characteristics of axial air inlet and radial air outlet, the external air flow can be continuously sucked into the housing 110 from the air inlets E1 and E2 during the continuous rotation of the impeller 120, thereby effectively increasing the overall air outlet volume.

Fig. 3 to 6 are schematic diagrams of centrifugal heat dissipation fans according to different embodiments of the present invention, wherein the same structures as those in the previous embodiments are denoted by the same reference numerals, and are not further described in detail later. Referring to fig. 3, which is equivalent to omitting the upper cover of the housing, in the embodiment, an orthographic projection dimension of the secondary air outlet E6 on the axis L1 is smaller than an orthographic projection dimension of the housing on the axis L1, that is, another sidewall structure 116 is further connected between the

sidewall structures

113 and 115 of the embodiment, and a dimension h1 of the sidewall structure 116 along the axial direction of the axis L1 is smaller than a dimension h2 of the housing along the axial direction of the axis L1, so that the secondary air outlet E6 is substantially smaller than the secondary air outlet E5 of the previous embodiment. Since the related electronic components in the body of the electronic device are designed in a planar manner or in a planar layered manner, the auxiliary air outlet E6 can be utilized to direct the heat dissipation air flow to a desired position to correspond to the layered design. That is, when the position of the heat source and other structures are different in the thickness direction parallel to the axis L1, the heat source requiring heat dissipation can be addressed by the auxiliary air outlet E6. Meanwhile, because of the existence of the side wall structure 116, a part of the airflow is still maintained in the housing and is continuously compressed by the impeller 120 and the side wall structure 116, so that a part of wind pressure can be maintained at the subsequent second main wind outlet E4 and the first main wind outlet E3.

Next, referring to fig. 4, the housing of the present embodiment has a plurality of sub air outlets E71, E72, E73 located in different radial directions and separated from each other, that is,

additional sidewall structures

117a, 117b are disposed on the

sidewall structures

113, 115 to form sub air outlets E71, E72, E73 at desired positions. The positions, the sizes and the number of the sub-outlets E71, E72 and E73 are not limited herein, and can be appropriately adjusted according to the conditions required by the heat dissipation system of the electronic device. Fig. 5 is similar to the embodiment shown in fig. 4, in which the auxiliary outlets E81, E82, E83, E84, and E85 are located at different radial directions and have different opening profiles, respectively.

Next, referring to fig. 6, in addition to forming different secondary air outlets E91, E92, E93, E94, E95, and E96, the present embodiment is further provided with

flow guiding structures

118a, 118b, 118c, 118d, and 118E respectively located beside the secondary air outlets E91, E92, E93, E94, E95, and E96 and extending away from the axis L1 (i.e., extending away from the axis L1). This further allows the air flow discharged from the secondary outlets E91, E92, E93, E94, E95, and E96 to be guided by the

flow guiding structures

118a, 118b, 118c, 118d, and 118E and to be corresponding to the heat source to be dissipated.

Fig. 7 and 8 are simplified schematic diagrams of heat dissipation systems of electronic devices according to different embodiments of the present invention. It should be noted that, in the body 20 of the electronic device, the related electronic components are designed in a planar manner or a planar layered manner, so that the centrifugal heat dissipation fan for radially discharging air is suitable for performing a heat dissipation operation. The heat dissipation systems shown in fig. 7 and 8 can adopt the centrifugal heat dissipation fans of the different embodiments according to the requirement.

Referring to fig. 7, in the heat dissipation system of the electronic device according to the present embodiment, the heat dissipation system includes a body 20,

heat sources

21 and 22 disposed in the body 20, and a centrifugal fan 100A, and a first main air outlet E3, a second main air outlet E4, and an auxiliary air outlet E51 of the centrifugal fan 100A correspond to the

different heat sources

21 and 22, respectively.

Further, the heat source 21 of the present embodiment includes an electronic chip 21a, a heat conduction component 21b and a heat sink 21c, wherein the heat conduction component 21b is connected between the electronic chip 21a and the heat sink 21c, so that the electronic chip 21a transfers heat to the heat sink 21c through the heat conduction component 21 b. Furthermore, the second main air outlet E4 of the centrifugal fan 100A corresponds to the heat dissipating fins 21c, and the sub air outlet E51 corresponds to the electronic chip 21 a. The heat source 22 of the present embodiment includes an electronic chip 22a, a heat conduction component 22b and heat dissipation fins 22c, wherein the heat conduction component 22b is connected between the electronic chip 22a and the heat dissipation fins 22c, so that the electronic chip 22a transfers heat to the heat dissipation fins 22c through the heat conduction component 22 b. The first main air outlet E3 of the centrifugal fan 100A corresponds to the heat dissipating fins 22c, and the auxiliary air outlet E51 corresponds to the electronic chip 22 a. Accordingly, the

electronic chips

21a and 22a are disposed inside the body 20, and the heat dissipating fins 21c and 22c are disposed at the edge inside the body 20, so that the centrifugal heat dissipating fan 100A can dissipate heat simultaneously for the inner heat dissipating

electronic chips

21a and 22a and for the outer heat dissipating fins 21c and 22c through the main outlets E3 and E4 and the sub outlet E5 in different radial directions.

Here, the

heat conduction components

21b, 22b are exemplified by heat pipes (heat pipes), but in another embodiment not shown, they may also be heat conductive plates (vapor chambers).

Referring to fig. 8, the heat dissipation system of the electronic device of the present embodiment includes a body 20,

heat sources

21 and 22 disposed in the body 20, and centrifugal

heat dissipation fans

100A and 100B, unlike the above embodiments, the present embodiment uses two

centrifugal fans

100A and 100B to dissipate heat from multiple heat sources simultaneously, wherein the

heat sources

21, 22 are the same as the above embodiment, but the present embodiment is added with the heat dissipation fins 23, so that the centrifugal heat dissipation fan 100A can also face the outside of the machine body 20 to dissipate the heat of the

heat dissipation fins

21c, 23, the centrifugal heat dissipation fan 100B also has

heat dissipation fins

22c and 23 facing the outside of the housing 20, and at the same time, the centrifugal

heat dissipation fans

100A and 100B respectively provide heat dissipation air flows from two opposite sides of the

electronic chips

21a and 22a, and also dissipate heat from the heat dissipation fins 23 toward the outside of the housing 20 after the heat dissipation air flows converge. That is, the present embodiment is configured as a further heat dissipation system by two centrifugal

heat dissipation fans

100A, 100B.

In summary, in the above embodiments of the present invention, since the casing of the centrifugal fan has the plurality of air outlets located in different radial directions, the casing can be optimally configured according to the position of the heat source in the body of the electronic device, which breaks the design concept of the centrifugal fan in the prior art, and the air flow is sucked into the casing from the axial inlet and then can be discharged from the different air outlets respectively in the process of being driven by the rotation of the impeller. The air outlets can respectively correspond to and provide and guide the required airflow to flow to a heat source or an object to be radiated, which is favorable for being used as a layout basis of a radiating system of a designer and effectively improves the radiating efficiency of the centrifugal radiating fan in the machine body.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centrifugal radiator fan, comprising:

the shell is provided with at least one air inlet arranged along the shaft and a plurality of air outlets positioned on different radial directions; and

an impeller disposed within the housing along the shaft.

2. A centrifugal radiator fan according to claim 1 wherein the housing further has an inner wall tongue abutting between two of the outlet openings.

3. A centrifugal radiator fan according to claim 2, wherein the casing has a first main outlet, a second main outlet and at least one auxiliary outlet, which are separated from each other, the inner wall tongue being abutted between the first main outlet and the auxiliary outlet.

4. The centrifugal heat dissipating fan according to claim 3, wherein the inner wall tongue, the auxiliary outlet port, the second main outlet port, and the first main outlet port are sequentially adjacent to each other in a rotation direction of the impeller to circulate.

5. The centrifugal heat dissipating fan of claim 3, wherein the first main outlet and the second main outlet are planar outlets, and the secondary outlet is a cambered outlet.

6. The centrifugal heat dissipating fan of claim 3, wherein a sum of an area of the first main air outlet and an area of the second main air outlet is larger than an area of the auxiliary air outlet.

7. The centrifugal heat dissipating fan of claim 3, wherein the radial direction of the outlet air of the first main outlet and the radial direction of the outlet air of the second main outlet are orthogonal to each other.

8. The centrifugal heat dissipating fan according to claim 3, wherein an orthographic projection size of the sub air outlet on the shaft is smaller than an orthographic projection size of the housing on the shaft.

9. The centrifugal heat dissipating fan of claim 3, wherein the housing has a plurality of secondary air outlets located in different radial directions.

10. The centrifugal heat dissipating fan of claim 3, wherein the housing further comprises at least one flow directing structure located at the secondary air outlet and extending away from the shaft.

11. A heat dissipation system for an electronic device, comprising:

a body;

a plurality of heat sources disposed within the body;

at least one centrifugal radiator fan, set up in the organism, centrifugal radiator fan includes:

the shell is provided with at least one air inlet arranged along the shaft and a plurality of air outlets positioned on different radial directions, wherein the plurality of air outlets respectively correspond to the plurality of heat sources; and

an impeller disposed within the housing along the shaft.

12. The heat dissipation system of claim 11, wherein the plurality of heat sources comprise at least one electronic chip, at least one heat conduction element, and at least one heat dissipation fin, the electronic chip transfers heat to the heat dissipation fin through the heat conduction element, and the plurality of air outlets respectively correspond to the electronic chip, the heat conduction element, or the heat dissipation fin.

13. The heat dissipation system of claim 12, wherein the electronic chip is disposed in the housing, the heat dissipation fins are disposed at an edge of the housing, a portion of the plurality of air outlets faces the housing to correspond to the electronic chip, and another portion of the plurality of air outlets faces the housing to correspond to the heat dissipation fins.

14. The heat dissipating system of claim 11, wherein the housing has a first main outlet, a second main outlet, at least one auxiliary outlet, and an inner tongue portion, the inner tongue portion is adjacent to and between the first main outlet and the auxiliary outlet, and the inner tongue portion, the auxiliary outlet, the second main outlet, and the first main outlet are sequentially adjacent to and circulate along a rotation direction of the impeller.

15. The heat dissipation system of claim 14, wherein the first main air outlet and the second main air outlet are planar air outlets, and the secondary air outlet is a cambered air outlet.

16. The heat dissipation system of claim 14, wherein a sum of an area of the first main air outlet and an area of the second main air outlet is larger than an area of the auxiliary air outlet.

17. The heat dissipation system of claim 14, wherein the radial direction of the air exiting from the first main air outlet and the radial direction of the air exiting from the second main air outlet are orthogonal to each other.

18. The heat dissipating system of claim 14, wherein an orthographic dimension of the secondary air outlet on the axis is smaller than an orthographic dimension of the housing on the axis.

19. The heat dissipating system of the electronic device as recited in claim 14, wherein the housing has a plurality of secondary air outlets located in different radial directions.

20. The heat dissipating system of claim 14, wherein the housing further comprises at least one flow directing structure disposed at the secondary air outlet and extending away from the shaft.