TWI885889B - Portable electronic device - Google Patents

Abstract

A portable electronic device including a first body, a second body, a heat source and a heat conductive member is provided. The second body is pivotally connected to the first body. The second body has a bottom portion, a top portion opposite to the bottom portion, a cooling channel extending from the bottom portion to the top portion, an air inlet located at the bottom portion, and an air outlet located at the top portion. The air inlet and the air outlet are communicated with the cooling channel. The heat source is disposed in the first body. The heat conductive member extends from the first body to the second body. The heat conduction element has a first end and a second end opposite to the first end, wherein the first end is thermally coupled to the heat source, and the second end is thermally coupled to the bottom portion of the second body.

Description

Portable electronic devices

The present invention relates to an electronic device, and in particular to a portable electronic device.

A laptop computer is composed of a first body and a second body connected to each other, wherein the first body is a host computer with logical computing capabilities, and the second body is a display with image display capabilities. Generally speaking, a central processing unit and a graphics processing unit are provided inside the first body, wherein the central processing unit and the graphics processing unit are the main heat sources inside the first body, and they will release a large amount of heat during operation.

The common practice is to install heat pipes, heat sink fins and fans inside the first body, and use the fans to generate forced convection to quickly discharge heat from the first body. Because the fan generates noise when it is running, notebook computers without fans have been proposed, such as installing a temperature plate inside the first body or transferring the heat to the second body and dissipating the heat through the back cover of the second body. However, the fanless design has the problem of poor heat dissipation efficiency.

The present invention provides a portable electronic device with excellent heat dissipation efficiency.

The present invention provides a portable electronic device, comprising a first body, a second body, a heat source and a heat conductive element. The second body is pivotally connected to the first body. The second body has a bottom, a top opposite to the bottom, a heat dissipation channel extending from the bottom to the top, an air inlet located at the bottom and an air exhaust port located at the top. The air inlet and the air exhaust port are connected to the heat dissipation channel. The heat source is disposed in the first body. The heat conductive element extends from the first body to the second body. The heat conductive element has a first end and a second end opposite to each other, wherein the first end is thermally coupled to the heat source, and the second end is thermally coupled to the bottom of the second body.

Based on the above, the heat generated by the heat source can be transferred to the second body, avoiding the performance degradation caused by the excessive temperature inside the first body. In addition, the heat transferred to the second body can be quickly discharged to the outside through heat exchange and convection of cold and hot air, so the portable electronic device of the present invention has excellent heat dissipation efficiency.

In order to make the above features and advantages of the present invention more clearly understood, embodiments are specifically cited below and described in detail with reference to the accompanying drawings.

FIG. 1A is a schematic diagram of a portable electronic device according to a first embodiment of the present invention. FIG. 1B is a partial cross-sectional schematic diagram of the portable electronic device of FIG. 1A along the section line I-I. Referring to FIG. 1A and FIG. 1B, in this embodiment, the portable electronic device 100 may be a notebook computer, and includes a first body 110, a second body 120, a heat source 130, and a heat conducting element 140. The second body 120 is pivotally connected to the first body 110, wherein the heat source 130 is disposed in the first body 110 and may be a central processing unit or a graphics processing unit.

The second body 120 has a bottom 121 and a top 122 opposite to the bottom 121, wherein the bottom 121 is pivotally connected to the first body 110, and the heat conductive element 140 extends from the first body 110 to the second body 120. In detail, the heat conductive element 140 has a first end 141 and a second end 142 opposite to each other, wherein the first end 141 is thermally coupled to the heat source 130, and the second end 142 is thermally coupled to the bottom 121 of the second body 120. Therefore, the heat generated by the heat source 130 can be transferred to the second body 120 via the heat conductive element 140, thereby preventing the performance from being reduced due to the excessively high temperature inside the first body 110.

For example, the heat conducting element 140 may be a wire or sheet made of copper, aluminum, graphite or other high heat conducting materials, and is suitable for bending under stress without being easily broken.

As shown in FIG. 1B , the second body 120 further has a heat dissipation channel 123 extending from the bottom 121 to the top 122, an air inlet 124 located at the bottom 121, and an air outlet 125 located at the top 122. The second end 142 of the heat conductive element 140 is located in the heat dissipation channel 123. Therefore, the heat generated by the heat source 130 can be transferred to the heat dissipation channel 123 through the heat conductive element 140, and a high temperature area is formed in the heat dissipation channel 123 near the bottom 121.

On the other hand, the cold air from the outside can enter the heat dissipation channel 123 through the air inlet 124, and perform heat exchange in the high temperature area of the heat dissipation channel 123 to form hot air. Since the density of hot air is less than that of cold air, buoyancy is generated, and the hot air can rise in the heat dissipation channel 123, flow through the top 122 of the second body 120, and finally be discharged to the outside through the exhaust port 125. In other words, the heat transferred to the second body 120 can be quickly discharged to the outside through heat exchange and convection of hot and cold air, so the portable electronic device 100 has excellent heat dissipation efficiency.

As shown in FIG. 1B , the portable electronic device 100 further includes a hinge 150, wherein the second body 120 is hinged to the first body 110 through the hinge 150, and the heat conducting element 140 passes through the hinge 150. Specifically, the hinge 150 is connected to or integrally formed with the bottom 121 of the second body 120, wherein the hinge 150 has a channel 151 for the heat conducting element 140 to pass through, and opposite ends of the channel 151 are respectively connected to the inside of the first body 110 and the heat dissipation channel 123.

On the other hand, the heat dissipation channel 123 has a bottom surface 1231, a top surface 1232 opposite to the bottom surface 1231, a first wall surface 1233, and a second wall surface 1234 opposite to the first wall surface 1233, wherein the air inlet 124 passes through the bottom surface 1231, and the air outlet 125 passes through the top surface 1232. In other words, the first wall surface 1233 and the second wall surface 1234 extend from the bottom surface 1231 to the top surface 1232, and the second end 142 of the heat conducting element 140 contacts or is attached to the first wall surface 1233.

As shown in FIG. 1B , the distance D1 between the first wall 1233 and the second wall 1234 gradually decreases from the bottom surface 1231 to the top surface 1232. In other words, the heat dissipation channel 123 may be a tapered channel whose cross-sectional area gradually decreases from the air inlet 124 to the air outlet 125, so as to accelerate the flow rate of the hot air in the heat dissipation channel 123 to the air outlet 125, so that the hot air is quickly discharged to the outside through the air outlet 125, and at the same time, the speed at which the cold air from the outside is introduced into the heat dissipation channel 123 through the air inlet 124 is accelerated, which can not only prevent heat accumulation in the second body 120, but also improve the convection efficiency.

For example, the first wall surface 1233 can be a plane, and the second wall surface 1234 can be an inclined surface, but not limited thereto. In other examples, the second wall surface 1234 can be a curved surface, a stepped surface, a sawtooth surface, a wavy surface, or a surface with other geometric shapes.

FIG1C is a schematic diagram of the second body of FIG1A. As shown in FIG1C, the second body 120 further has two opposite guides 126. The two guides 126 extend from the bottom 121 to the top 122, and the heat dissipation channel 123 is located between the two guides 126. For example, the heat dissipation channel 123 can be a part of the internal space of the second body 120, and the two guides 126 define the distribution range of the heat dissipation channel 123 in the internal space.

As shown in FIG. 1B and FIG. 1C , the distance D1 between the first wall surface 1233 and the second wall surface 1234 defines the short side of the cross section of the heat dissipation channel 123 , and the distance D2 between the two air guide portions 126 defines the long side of the cross section of the heat dissipation channel 123 .

As shown in FIG. 1C , the distance D2 between the two guide portions 126 gradually decreases from the bottom 121 to the top 122. Furthermore, the heat dissipation channel 123 may be a tapered channel with a cross-sectional area gradually decreasing from the air inlet 124 to the air outlet 125, so as to accelerate the flow rate of hot air flowing from the heat dissipation channel 123 to the air outlet 125, so that the hot air is quickly discharged to the outside through the air outlet 125, and at the same time, the speed of cold air from the outside being introduced into the heat dissipation channel 123 through the air inlet 124 is accelerated, which can not only prevent heat accumulation in the second body 120, but also improve convection efficiency.

In one example, the second body is not equipped with two guide parts, wherein the heat dissipation channel can be the entire internal space of the second body, and the distance between the first wall surface and the second wall surface gradually decreases from the bottom surface to the top surface.

In one example, the heat dissipation channel can be a part of the inner space of the second body, and the two guide parts define the distribution range of the heat dissipation channel in the inner space. In addition, the distance between the first wall surface and the second wall surface gradually decreases from the bottom surface to the top surface, and the distance between the two guide parts remains unchanged from the bottom to the top.

In one example, the heat dissipation channel can be a part of the inner space of the second body, and the two guide parts define the distribution range of the heat dissipation channel in the inner space. In addition, the distance between the first wall surface and the second wall surface remains unchanged from the bottom surface to the top surface, and the distance between the two guide parts gradually decreases from the bottom to the top.

FIG2A is a partial cross-sectional schematic diagram of a portable electronic device of a second embodiment of the present invention. FIG2B is a schematic diagram of a second body in the portable electronic device of the second embodiment of the present invention. Referring to FIG2A and FIG2B , the design of the portable electronic device 100A of this embodiment is substantially the same as that of the portable electronic device 100 of the first embodiment, and the main difference between the two is that in the second body 120a of this embodiment, the air inlet 124 penetrates the second wall 1234.

FIG. 3A is a partial cross-sectional schematic diagram of a portable electronic device of a third embodiment of the present invention. FIG. 3B is a schematic diagram of a second body in the portable electronic device of the third embodiment of the present invention. Referring to FIG. 3A and FIG. 3B , the portable electronic device 100B of this embodiment is substantially the same in design as the portable electronic device 100 of the first embodiment, and the main difference between the two is that in the second body 120b of this embodiment, a portion of the air inlet 124 penetrates the bottom surface 1231, and another portion of the air inlet 124 penetrates the second wall surface 1234.

In summary, the heat generated by the heat source can be transferred to the heat dissipation channel in the second body, and the cold air from the outside can enter the heat dissipation channel through the air inlet located at the bottom of the second body. The cold air performs heat exchange in the heat dissipation channel to form hot air, and the hot air rises in the heat dissipation channel and flows to the top of the second body, and finally is discharged to the outside through the exhaust port located at the top of the second body. In other words, the heat generated by the heat source can be transferred to the second body to avoid performance degradation caused by excessive temperature inside the first body. In addition, the heat transferred to the second body can be quickly discharged to the outside through heat exchange and convection of hot and cold air, so the portable electronic device of the present invention has excellent heat dissipation efficiency.

Although the present invention has been disclosed as above by the embodiments, they are not intended to limit the present invention. Any person with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the scope of the attached patent application.

100, 100A, 100B: portable electronic device 110: first body 120, 120a, 120b: second body 121: bottom 122: top 123: heat dissipation channel 1231: bottom surface 1232: top surface 1233: first wall surface 1234: second wall surface 124: air inlet 125: exhaust port 126: flow guide 130: heat source 140: heat conducting element 141: first end 142: second end 150: hub 151: channel D1, D2: distance I-I: section line

FIG. 1A is a schematic diagram of a portable electronic device of a first embodiment of the present invention. FIG. 1B is a schematic diagram of a partial cross-section of the portable electronic device of FIG. 1A along the section line I-I. FIG. 1C is a schematic diagram of a second body of FIG. 1A. FIG. 2A is a schematic diagram of a partial cross-section of a portable electronic device of a second embodiment of the present invention. FIG. 2B is a schematic diagram of a second body in a portable electronic device of a second embodiment of the present invention. FIG. 3A is a schematic diagram of a partial cross-section of a portable electronic device of a third embodiment of the present invention. FIG. 3B is a schematic diagram of a second body in a portable electronic device of a third embodiment of the present invention.

100: Portable electronic devices

110: First Body

120: Second body

121: Bottom

122: Top

123: Heat dissipation channel

1231: Bottom surface

1232: Top

1233: First wall

1234: Second wall

124: Air intake

125: Exhaust port

130: Heat source

140: Thermal conductive element

141: First end

142: Second end

150: Joints

151: Channel

D1: distance

Claims (8)

A portable electronic device comprises: a first body; a second body pivotally connected to the first body, wherein the second body has a bottom, a top opposite to the bottom, a heat dissipation channel extending from the bottom to the top, an air inlet located at the bottom and an air outlet located at the top, and the air inlet and the air outlet are connected to the heat dissipation channel; a heat source disposed in the first body; and a heat conducting element extending from the first body to the second body, wherein the heat conducting element has a first end and a second end opposite to each other, the first end is thermally coupled to the heat source, and the second end is thermally coupled to the bottom of the second body, The heat dissipation channel has a bottom surface, a top surface opposite to the bottom surface, a first wall surface, and a second wall surface opposite to the first wall surface, and the exhaust port penetrates the top surface, the first wall surface and the second wall surface extend from the bottom surface to the top surface, and the second end of the heat conductive element contacts the first wall surface, and the distance between the first wall surface and the second wall surface gradually decreases from the bottom surface to the top surface. A portable electronic device as described in claim 1, wherein the second end of the heat conductive element is located in the heat dissipation channel. A portable electronic device as described in claim 1, wherein the first wall surface is a plane and the second wall surface is an inclined surface. A portable electronic device as described in claim 1, wherein the air inlet penetrates the bottom surface or the second wall surface. As described in claim 1, the second body further has two opposite guide parts, and the two guide parts extend from the bottom to the top, and the heat dissipation channel is located between the two guide parts. A portable electronic device as described in claim 5, wherein the distance between the two guide portions gradually decreases from the bottom to the top. The portable electronic device as described in claim 1 further comprises: A hinge, wherein the second body is hinged to the first body through the hinge, and the heat conductive element passes through the hinge. A portable electronic device as described in claim 7, wherein the hub is connected to the bottom of the second body and has a channel connected to the heat dissipation channel, and the heat conductive element is disposed through the channel.

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