CN114967880A

CN114967880A - Heat radiation system of portable electronic device

Info

Publication number: CN114967880A
Application number: CN202110196377.9A
Authority: CN
Inventors: 陈宗廷; 廖文能; 谢铮玟; 林育民; 陈伟今; 林光华; 王俊杰; 郭书豪
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2022-08-30
Anticipated expiration: 2041-02-22
Also published as: CN114967880B

Abstract

The invention provides a heat dissipation system of a portable electronic device, which comprises a machine body and at least one fan. The heat source is disposed in the body. The fan is a centrifugal fan and is arranged in the machine body. The fan is provided with at least one air inlet, at least one air outlet and at least one spacing part, wherein the air outlet faces the heat source, and the spacing part surrounds the air inlet and is abutted against the machine body so as to isolate the air inlet and the heat source from two mutually independent spaces in the machine body.

Description

Heat radiation system of portable electronic device

Technical Field

The present disclosure relates to heat dissipation systems, and particularly to a heat dissipation system for a portable electronic device.

Background

The performance of electronic components is improved as the command cycle is faster, so that the portable electronic device, such as a notebook computer, needs to exhaust air from the portable electronic device through a centrifugal fan to lower the internal temperature of the device.

Furthermore, in order to meet the current trend of light, thin, short, and high performance of the device, the heat dissipation assembly in the portable electronic device is miniaturized accordingly, so that the situation of insufficient heat dissipation efficiency is often encountered.

Meanwhile, the conventional fan usually has only one air outlet, the heat dissipation efficiency is limited, and on the premise of not increasing the number of the fans, although the fan can adopt the design of two air outlets, under the condition that no correspondingly designed airflow path is provided, the fan cannot exert the heat dissipation effect, and is also easy to generate heat dissipation path conflict in the device or cause overlarge thermal impedance in the device, so that the situation that heat accumulation cannot be dissipated out of the portable electronic device is caused. For example, if there is no corresponding heat dissipation airflow path, the heat that would otherwise be exhausted from the device may be drawn into the device again by the fan.

Based on the above, how to arrange the fan in the device can be matched with a specific airflow path at the same time to smoothly discharge heat to achieve the required heat dissipation effect is a subject that needs to be considered and solved by related technical personnel

Disclosure of Invention

The invention relates to a heat dissipation system of a portable electronic device, which isolates a heat source and an air inlet of a fan from two independent spaces in a machine body through a spacing part of the fan so as to ensure that a heat dissipation airflow path generated by the fan does not conflict.

According to an embodiment of the invention, a heat dissipation system of a portable electronic device comprises a body and at least one fan. The heat source is disposed in the body. The fan is a centrifugal fan and is arranged in the machine body. The fan is provided with at least one air inlet, at least one air outlet and at least one spacing part, the air outlet faces the heat source, and the spacing part surrounds the air inlet and is abutted against the machine body so as to isolate the air inlet and the heat source from two independent spaces in the machine body.

Based on the above, because the heat dissipation system of the portable electronic device surrounds the air inlet of the fan and abuts against the body through the partition portion of the centrifugal fan, so that the air inlet and the heat source in the body can be isolated from two independent spaces by the partition portion, the air inlet can ensure that the air sucked by the air inlet is only from the external environment of the body, and simultaneously avoid the possibility that the heat generated by the heat source is sucked by the fan again, thereby providing an improved countermeasure for the heat accumulation situation generated by the conflict of the heat dissipation paths in the existing body.

Drawings

FIG. 1 is a diagram of a portable electronic device according to an embodiment of the invention;

FIG. 2 is an exploded view of a heat dissipation system according to an embodiment of the present invention;

FIG. 3 is a top view of a heat dissipation system according to the present invention;

fig. 4A and fig. 4B are cross-sectional views of the heat dissipation system of fig. 3 at different positions, respectively;

FIG. 5 is a partial cross-sectional view of a heat dissipation system of another embodiment of the present invention;

fig. 6A and 6B are schematic diagrams illustrating a heat dissipation system in a portable electronic device from different perspectives;

fig. 7A and 7B are schematic diagrams of fans 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 a schematic diagram of a portable electronic device according to an embodiment of the invention. Fig. 2 is an exploded view of a heat dissipation system according to an embodiment of the invention. Fig. 3 is a top view of a heat dissipation system according to the present invention. The present embodiment also provides orthogonal coordinates X-Y-Z to facilitate component identification. Referring to fig. 1 to fig. 3, in the present embodiment, a heat dissipation system 100 is suitable for a portable electronic device 10 (such as a notebook computer), and the heat dissipation system 100 includes a body 110 and at least one fan 120. The heat sources 11 and 12 (e.g., a CPU and a GPU) are disposed in the body 110. The fan 120 is a centrifugal fan, and is disposed in the body 110. The fan 120 has at least one air inlet (as shown in fig. 1 to 3, the fan 120 has an air inlet N1, and there is another air inlet N2 on the opposite side, which is disclosed in the following drawings), at least one air outlet (as shown in fig. 1 to 3, the fan 120 has a second air outlet N3 and a first air outlet N4), and at least one partition (as shown in fig. 1 to 3, the fan 120 has

partitions

122 and 123 disposed on the two opposite surfaces of the fan body 121), the first air outlet N4 faces the

heat sources

11 and 12, and the

partitions

122 and 123 surround the corresponding air inlets N1 and N2 and respectively abut against the body 110, so as to isolate the air inlets N1 and N2 from the

heat sources

11 and 12 in the body 110 into two independent spaces.

Fig. 4A and 4B are cross-sectional views of the heat dissipation system of fig. 3 at different positions, respectively. Referring to fig. 2 to 4A, in addition, the body 110 includes an upper casing 111 and a lower casing 112, at least one of the upper casing 111 and the lower casing 112 has an opening corresponding to the air inlet, in this embodiment, the upper casing 111 has a (hole-shaped) opening 111a corresponding to the air inlet N1 of the fan, and the lower casing 112 has a (grid-shaped) opening 112a corresponding to the air inlet N2. Accordingly, when the fan 120 is operated, the air in the environment outside the body 110 can flow into the fan 120 through the

openings

111a and 112a and the air inlets N1 and N2. Meanwhile, since the

spacing portions

122 and 123 of the fan 120 are respectively made of a buffer material, such as foam, which has flexibility and elasticity and can be abutted against the upper casing 111 and the lower casing 112, the space in the machine body 110 where the air inlets N1 and N2 are located and the space in the machine body 110 where the

heat sources

11 and 12 are located are in an isolated and independent state from each other, so as to ensure that the heat generated by the

heat sources

11 and 12 does not affect the space where the air inlets N1 and N2 are located, that is, the air inlets N1 and N2 can only suck the air of the external environment through the

openings

111a and 112a of the machine body 110, ensure that the cold air sucked by the fan 120 is cold air, and thus being beneficial to performing effective heat dissipation action on the

heat sources

11 and 12 when the cold air is blown out from the second air outlet N3 and the first air outlet N4. Here, the air inlets N1 and N2 of the fan 120 are coaxially disposed, and as shown in fig. 2, the

partitions

122 and 123 are disposed along the circumferential edge of the fan body 121 of the fan 120 to have a closed contour.

Referring to fig. 3, fig. 4A and fig. 4B, generally speaking, the body 110 of the embodiment has at least one opening, and the airflow generated by the fan 120 flows out from the air outlet, and flows out of the body 110 from the opening after dissipating heat from the

heat sources

11 and 12 or related heat dissipating members. In detail, the fan 120 of the present embodiment operates to suck the cool air outside the housing 110 from the air inlets N1 and N2, i.e. the air flow F1 shown in the drawing. Furthermore, as shown in fig. 2, 3 and 4B, the body 110 has a plurality of openings 111B, 111c, and the heat dissipation system 100 of the portable electronic device 10 further has a heat conducting element 130 and a heat dissipation element 140, wherein as shown in fig. 2 and 3, the heat conducting element 130 is, for example, a heat pipe, the heat dissipation element 140 is, for example, a heat dissipation fin (the figure of the present embodiment is only schematically illustrated), and the heat conducting element 130 is in thermal contact between the

heat sources

11, 12 and the heat dissipation element 140 to transfer heat generated by the

heat sources

11, 12 to the heat dissipation element 140. In addition, since the fan 120 has the first outlet N4 and the second outlet N3, the airflows F2 and F3 generated by the fan 120 respectively flow out from the first outlet N4 and the second outlet N3, and the heat dissipation member 140 is located between the second outlet N3 and the opening 111b, wherein the airflow F2 flowing out from the second outlet N3 passes through the heat dissipation member 140 and flows out of the body 110 from the opening 111b, and the airflow F3 flowing out from the first outlet N4 passes through the

heat sources

11 and 12 and then flows out of the body 110 from the opening 111 c.

In this way, the cold air sucked into the fan 120 can flow out from the first outlet N4 and the second outlet N3, respectively, wherein the cold air flowing out from the first outlet N4 (airflow F3) can directly blow and dissipate heat of the

heat sources

11 and 12 in the body 110, and then blow out of the body 110 through the opening 111c of the body 110, and the cold air flowing out from the second outlet N3 (airflow F2) blows and dissipates heat of the heat dissipating member 140, and then blows out of the body 110 through the opening 111b of the body 110. In other words, the fan 120 of the present embodiment, and particularly the centrifugal fan, axially enters the air and the

partition portions

122 and 123 respectively surround the axially entering portions to form independent spaces, so as to ensure that the axially entering air enters the fan 120 as cold air of the external environment of the housing 110, and the spaces where the first air outlet N4 and the second air outlet N3 are located, the

heat sources

11 and 12 and the heat sink 140 are isolated from each other, so that a unidirectional and non-conflicting heat dissipation airflow path can be provided, and the heat dissipation capability of the fan 120 is improved.

Fig. 5 is a partial cross-sectional view of a heat dissipation system in accordance with another embodiment of the present invention. Referring to fig. 5, the

partition portions

122 and 123 of the embodiment are different from the fan body 121 of the fan 120, and in the embodiment shown in fig. 5, the partition portion 221 is also a fan body structure, that is, the partition portion 221 and the fan body are regarded as an integral structure in the embodiment, and the integral structure is directly abutted to the machine body 110, as shown in fig. 5, the partition portion 221 includes an upper top plate 221a and a lower top plate 221b, which are respectively abutted to the upper casing 111 and the lower casing 112 of the machine body 110. In this way, the opening 111a of the upper casing 111 can be regarded as a structure consistent with the air inlet N1, and the opening 112a of the lower casing 112 can be regarded as a structure consistent with the air inlet N2.

Fig. 6A and 6B are schematic diagrams illustrating a heat dissipation system in a portable electronic device from different viewing angles, wherein the viewing angles of the two are substantially opposite to each other. That is, fig. 6A and 6B can be seen as top and bottom views of the inside of the host of the notebook computer. Referring to fig. 6A and 6B, in the present embodiment, the heat dissipation system includes two fans, and the fan bodies 121 are respectively located at two opposite sides of the

heat sources

11 and 12. Similarly, each fan has two outlets to generate air flows F2 and F3 as shown in the figure, the air flow F2 is used for dissipating heat of the heat dissipating member 140, and the air flow F3 is used for dissipating heat of the

heat sources

11 and 12. In this embodiment, two fans are further provided as a heat dissipation means, wherein the outlets (corresponding to the first outlet N4 of the foregoing embodiment) generating the airflow F3 are opposite to each other and both face the

heat sources

11 and 12, and the outlets (corresponding to the second outlet N3 of the foregoing embodiment) generating the airflow F2 are opposite to each other and both face the outside of the housing 110, so as to provide better heat dissipation efficiency.

It should be noted that, in this embodiment, besides the separate spaces SP1, SP2 are formed by the

partition parts

122B, 123B of the fan surrounding the air inlet, the

retaining walls

150, 160 are further provided in the body 110, and are respectively adjacent to and between the

partition parts

122B, 123B of the fan, and different spaces are separated again in the body 110. As shown in fig. 6A, the retaining wall 150, the partition 122B and the body 110 partially form a space SP3, and the

heat sources

11 and 12 are located in the space SP3, and as shown in fig. 6B, the retaining wall 160, the partition 123B and the body 110 partially form a space SP6, and the

heat sources

11, 12 and 15 (e.g., memory modules) are located in the space SP 6.

In the present embodiment, the portable electronic device 10 further includes a circuit board 13 and a battery 14, the

heat sources

11, 12 and 15 and the retaining

walls

150 and 160 are respectively disposed on two opposite surfaces of the circuit board 13, and the retaining

walls

150 and 160 described in the previous paragraph can maintain the spaces SP3 and SP6 where the

heat sources

11, 12 and 15 are located in an isolated state from the spaces SP1 and SP2 where the air inlets are located, or from the spaces SP4 and SP5 where other components (such as the battery 14) are located, so as to prevent the heat generated by the

heat sources

11, 12 and 15 from affecting the fan or other components in the body. In the present embodiment, the

heat sources

11, 12 and 15 and the battery 14 are isolated by the retaining

walls

150 and 160, so that the battery 14 can be prevented from being damaged due to heat transmitted from the spaces SP3 and SP6 to the spaces SP4 and SP 5.

Fig. 7A and 7B are schematic diagrams of fans according to different embodiments of the present invention. Referring to fig. 7A, unlike the

spacers

122 and 123 of the previous embodiments, the spacer 122A of the present embodiment is a buffer material and is disposed on the fan body 121 along the periphery of the air inlet N1 to form a closed contour. Next, referring to fig. 7B, in the present embodiment, the spacing portion 122D is a buffer material, and is in a closed contour and located between the air inlet N1 and the structural periphery of the fan body 121. In the foregoing embodiments, the

spacers

122 and 123 or the

spacers

122A and 122D described in this paragraph can isolate the air inlet N1 and the air outlets (e.g., the first air outlet N4 and the second air outlet N3) of the fan from each other, thereby avoiding the heat dissipation air flows from colliding with each other. Furthermore, the number of air inlets is not limited in this embodiment, and only a single air inlet is disposed on the impeller shaft of the fan body 121 according to the requirement of heat dissipation. For example, taking fig. 2 as an example for comparison, the single air inlet can only leave the air inlet N1 on the fan body 121, so that the body 110 only needs to reserve the corresponding opening 111a on the upper shell 111, and the lower shell 112 can remove the opening 112a, because the opening 111a can be shielded due to the keyboard of the notebook computer as shown in fig. 1, the body 110 can have a back-beautifying structure due to the removal of the opening 112a, so that the portable electronic device 10 can obtain a better appearance visual effect.

In summary, the heat dissipation system of the portable electronic device of the present invention surrounds the air inlet of the fan and abuts against the housing through the partition portion of the centrifugal fan, so that the air inlet and the heat source inside the housing can be isolated from each other by the partition portion, and therefore the air inlet can ensure that the air sucked by the air inlet is only from the external environment of the housing, and simultaneously avoid the possibility that the heat generated by the heat source is sucked by the fan again, thereby providing an improved measure for the heat accumulation situation caused by the heat dissipation path conflict inside the conventional housing.

Further, for portable electronic devices (notebook computers), the arrangement of the heat dissipation system has been a major factor affecting the performance of electronic components (e.g., CPU, GPU). The flow field arrangement disclosed in the above embodiments of the present invention provides a corresponding airflow path design for the fan with dual air outlets, so that the fan can generate forced convection to solve the problem of overheating of the machine body, thereby further improving the efficiency of the electronic component and reducing the manufacturing cost of the heat dissipation system.

That is, the above-mentioned embodiments of the present invention form an effective isolation structure for the air inlet and the air outlet of the fan through the partition portion of the fan, so that the interference and the conflict of the heat dissipation air flow paths can be effectively avoided, thereby providing an effective heat dissipation means for the heat source.

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 these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A heat dissipation system of a portable electronic device, comprising:

the portable electronic device comprises a machine body, a heat source and a heat sink, wherein at least one heat source of the portable electronic device is arranged in the machine body; and

the fan is a centrifugal fan and is arranged in the machine body, the fan is provided with at least one air inlet, at least one air outlet and at least one spacing part, the air outlet faces the heat source, and the spacing part surrounds the air inlet and is abutted to the machine body so as to isolate the air inlet and the heat source from two independent spaces in the machine body.

2. The heat dissipation system of claim 1, wherein the housing comprises an upper housing and a lower housing, at least one of the upper housing and the lower housing has an opening corresponding to the air inlet, and ambient air outside the housing flows into the fan through the opening and the air inlet.

3. The heat dissipation system of claim 1, wherein the housing has at least one opening, and the airflow generated by the fan flows out of the air outlet, passes through the heat source, and then flows out of the housing through the opening.

4. The heat dissipation system of claim 3, wherein the body has a plurality of openings, the heat dissipation system of the portable electronic device further comprises a heat conduction element and a heat dissipation element, wherein the heat conduction element is in thermal contact between the heat source and the heat dissipation element, so as to transfer the heat generated by the heat source to the heat dissipation member, the fan is provided with a first air outlet and a second air outlet, the air flow generated by the fan respectively flows out from the first air outlet and the second air outlet, the heat dissipation member is positioned between the second air outlet and part of the plurality of openings, the airflow flowing out of the second air outlet passes through the heat dissipation element and flows out of the machine body from a part of the plurality of openings, and the airflow flowing out of the first air outlet passes through the heat source and then flows out of the machine body from another part of the plurality of openings.

5. The heat dissipation system of claim 1, wherein the spacer is a buffer material and is disposed along a periphery of the air inlet to form a closed contour.

6. The heat dissipation system of claim 1, wherein the spacer is a buffer material disposed along a periphery of the fan to form a closed contour.

7. The heat dissipation system of claim 1, wherein the spacer is a buffer material having a closed contour and located between the air inlet and the periphery of the fan.

8. The heat dissipation system of claim 1, wherein the housing comprises an upper housing and a lower housing, the fan has two air inlets and two spacers coaxially disposed in a corresponding manner, the two spacers are made of a buffer material and abut against the upper housing and the lower housing, respectively.

9. The heat dissipation system as claimed in claim 1, wherein the spacer protrudes from the fan body of the fan.

10. The heat dissipation system of claim 1, wherein the spacer is a fan body of the fan.

11. The heat dissipation system of claim 1, comprising two fans respectively disposed at two opposite sides of the heat source, each fan having a first outlet and a second outlet, the first outlets facing the heat source and the second outlets facing away from each other and the body.

12. The heat dissipation system as claimed in claim 11, further comprising at least one retaining wall adjacent to between the plurality of partitions of the two fans, wherein the heat source is located in a space surrounded by the retaining wall, the plurality of partitions and a portion of the housing.

13. The heat dissipation system as claimed in claim 12, wherein the portable electronic device further comprises a circuit board and a battery, the heat source and the retaining wall are disposed on the circuit board, and the heat source and the battery are separated by the retaining wall into two independent spaces.