Air cooling system for handheld electronic equipment

Abstract

The invention discloses an air-cooling and heat dissipation system for a handheld electronic device, comprising a metal pipe and a micro-duct fan installed inside the metal pipe; the metal pipe comprises a first flat pipe section, a first transition pipe installed on one side of the first flat pipe section, a fan section installed on one side of the first transition pipe, a second transition pipe installed on one side of the fan section, and a second flat pipe section installed on one side of the second transition pipe; a micro-duct fan is installed inside the fan section; the first flat pipe section is an air inlet for the air flow, and the bottom of the second flat pipe section is closely attached to a heat source; the second flat pipe section is an air outlet for the air flow; the air flow enters the metal pipe through the air inlet, and is discharged from the air outlet by the micro-duct fan; the invention improves the heat dissipation of the air-cooling and heat dissipation system, reduces the volume of the air-cooling and heat dissipation system, and also enables the power of the electronic device to be further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air cooling and heat dissipation systems, and in particular to an air cooling and heat dissipation system for handheld electronic devices. Background Art

[0002] With the advancement of technology, the power consumption of handheld electronic devices is getting higher and higher, and the heat generation is getting higher and higher. Conventional heat dissipation systems are gradually unable to meet the heat dissipation needs of handheld electronic devices due to their insufficient heat dissipation capacity. Specifically, the space of handheld devices is very limited, so there are generally two types of heat dissipation systems used: passive heat dissipation system, which consists of a heat-absorbing bottom, a heat pipe and a heat dissipation backplane. The heat-absorbing bottom is in direct contact with the heat source, absorbs the heat from the heat source, and then the heat is transferred to the heat dissipation backplane through the heat pipe, and finally the heat dissipation backplane dissipates the heat to the surrounding air; active heat dissipation system, which consists of an air inlet, an air duct, a centrifugal fan and an air outlet. Due to the action of the centrifugal fan, the air flow enters the air duct through the air inlet, and the heat emitted by the heat source is directly or indirectly transferred to the air duct, and then the flowing air generated by the centrifugal fan carries the heat through the air duct and the air outlet.

[0003] When a passive cooling system is used, only flat heat pipes can be used due to limited size. However, the maximum heat transfer of small-sized flat heat pipes is very small, resulting in limited cooling effect of the passive cooling system, and thus the power of the electronic equipment cannot be further increased.

[0004] When an active cooling system is used, the air duct impedance is too large due to the limited internal space, resulting in a relatively small flow in the air duct, resulting in a relatively low heat dissipation capacity, and therefore it is difficult to increase the power of the electronic equipment.

[0005] Therefore, both of the above two heat dissipation systems cannot meet the heat dissipation requirements of handheld electronic devices. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide an air-cooling heat dissipation system for a handheld electronic device, which improves the heat dissipation of the air-cooling heat dissipation system, reduces the volume of the air-cooling heat dissipation system, and also allows the power of the electronic device to continue to be improved.

[0007] To achieve the above-mentioned purpose, the present invention provides an air-cooling heat dissipation system for a handheld electronic device, comprising a metal pipe and a micro-duct fan installed inside the metal pipe; the metal pipe comprises a first flat pipe section, a first transition pipe installed on one side of the first flat pipe section, a fan section installed on one side of the first transition pipe, a second transition pipe installed on one side of the fan section, and a second flat pipe section installed on one side of the second transition pipe; a micro-duct fan is installed inside the fan section; the first flat pipe section is an air inlet for the air flow, and the bottom of the second flat pipe section is close to a heat source; the second flat pipe section is an air outlet for the air flow; the air flow enters the metal pipe through the air inlet, and is discharged from the air outlet by the micro-duct fan.

[0008] Preferably, the cross-sectional area of ​​the flow passages of the first flat tube segment and the second flat tube segment is S1, the cross-sectional area of ​​the flow passage of the fan segment is S2, and the ratio of the cross-sectional area S1 of the flow passages of the first flat tube segment and the second flat tube segment to the cross-sectional area S2 of the flow passage of the fan segment is between 0.6 and 1.2.

[0009] Preferably, the second flat tube section is a copper alloy material component or an aluminum alloy material component.

[0010] Preferably, the first transition duct and the fan segment, and the fan segment and the second transition duct are connected together by gluing or welding.

[0011] Preferably, the bottom of the second flat tube section is a plane and is in close contact with the heat source, serving as a heat absorbing plane.

[0012] Preferably, the micro duct fan is a micro single-stage duct axial flow fan, a micro two-stage duct axial flow fan or a micro single-screw fan.

[0013] Preferably, the micro duct fan is a micro single-stage duct axial flow fan; the micro single-stage duct axial flow fan comprises an outer shell, which is cylindrical; a micro DC brushless motor is installed inside the outer shell; a motor bracket is installed between the outer shell and the micro DC brushless motor, and the motor bracket is used to support the micro DC brushless motor; a motor shaft core is also installed at one end of the micro DC brushless motor; an axial flow impeller is installed on the motor shaft core, and the micro DC brushless motor is also connected to a wire for providing power to the micro DC brushless motor.

[0014] Preferably, the micro duct fan is a micro two-stage duct axial flow fan; the micro two-stage duct axial flow fan comprises an outer shell, which is cylindrical; a micro DC brushless motor is installed inside the outer shell; a motor bracket is installed between the outer shell and the micro DC brushless motor, and the motor bracket is used to support the micro DC brushless motor; motor shaft cores are installed at both ends of the micro DC brushless motor; an axial flow impeller is installed on the motor shaft core, and the micro DC brushless motor is also connected to a wire for providing power to the micro DC brushless motor.

[0015] Preferably, the micro duct fan is a micro single-screw fan; the micro single-screw fan comprises an outer shell, which is cylindrical; a micro DC brushless motor is installed inside the outer shell; a motor bracket is installed between the outer shell and the micro DC brushless motor, and the motor bracket is used to support the micro DC brushless motor; a motor shaft core is installed at one end of the micro DC brushless motor; a screw rotor is installed on the motor shaft core, a bearing is installed at the end of the motor shaft core, the bearing is installed inside the bearing bracket, and the bearing bracket is connected to the outer shell; the micro DC brushless motor is also connected to a wire for providing power to the micro DC brushless motor.

[0016] Preferably, the diameter of the air-cooling heat dissipation system does not exceed 8.5 mm.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The air-cooling and heat dissipation system described in the present invention includes a metal pipe and a micro-duct fan installed inside the metal pipe, the first flat pipe section is the air inlet of the airflow, the second flat pipe section is the air outlet of the airflow, and the micro-duct fan discharges the airflow from the air outlet; the metal pipe is used as the air duct, and the metal pipe is a low-impedance air duct. The system flow rate is much higher than the centrifugal fan and the high-impedance air duct in the prior art, thereby improving the heat dissipation of the air-cooling and heat dissipation system, reducing the volume of the air-cooling and heat dissipation system, and at the same time, the power of the electronic equipment can be further improved; the present invention also installs the micro-duct fan inside the fan section, so that the micro-duct fan is in a fully enclosed state, which can improve the dustproof and waterproof performance of the air-cooling and heat dissipation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1It is a structural schematic diagram of an air cooling and heat dissipation system for a handheld electronic device provided by the present invention;

[0021] Figure 2 It is a front view of an air cooling and heat dissipation system for a handheld electronic device provided by the present invention;

[0022] Figure 3 yes Figure 2 Sectional view of AA in the middle;

[0023] Figure 4 yes Figure 2 Cross-sectional view of the middle BB;

[0024] Figure 5 yes Figure 2 Cross-sectional view of CC;

[0025] Figure 6 It is a cross-sectional view of a micro duct fan in an air-cooled heat dissipation system, which is a micro single-stage duct axial flow fan;

[0026] Figure 7 It is a cross-sectional view of a micro duct fan in an air-cooled heat dissipation system, which is a micro two-stage duct axial flow fan;

[0027] Figure 8 It is a cross-sectional view of a micro duct fan in an air-cooled heat dissipation system as a micro single-screw fan;

[0028] Fig. 9 It is a structural schematic diagram of the screw rotor in a micro single-screw fan.

[0029] Included in the figure are:

[0030] 1-metal pipe, 11-first flat pipe section, 12-first transition pipe, 13-fan section, 14-second transition pipe, 15-second flat pipe section, 3-heat source, 4-mini single-stage duct axial flow fan, 5-mini two-stage duct axial flow fan, 6-mini single screw fan, 41-housing, 42-mini DC brushless motor, 43-motor bracket, 44-motor shaft core, 45-axial flow impeller, 46-conducting wire, 47-screw rotor, 48-bearing, 49-bearing bracket. DETAILED DESCRIPTION

[0031] The technical scheme in this embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in this embodiment of the present invention. Obviously, the described embodiment is one embodiment of the present invention, not all embodiments of the present invention. Based on this embodiment of the present invention, all other embodiments of the present invention obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 9The present invention provides an air-cooling heat dissipation system for a handheld electronic device.

[0033] like Figure 1 As shown, the air-cooling heat dissipation system includes a metal pipe 1 and a micro-duct fan installed inside the metal pipe 1; the airflow flows in from one end of the metal pipe 1, is driven or pressurized by the micro-duct fan installed inside the metal pipe 1, and flows out from the other end of the metal pipe 1.

[0034] Specifically, the metal pipe 1 is made of a metal material component with good thermal conductivity; the outflow end of the metal pipe 1 is close to the heat source 3, and the metal pipe 1 absorbs heat from the heat source 3; the heat is transferred to the air flow inside the metal pipe 1, or the air flow inside the metal pipe 1 is heated; the micro duct fan drives the internal air flow and discharges it from the other end of the metal pipe 1, thereby taking away the heat from the heat source 3; thereby achieving the purpose of cooling the heat source 3.

[0035] Furthermore, the metal pipe 1 includes a first flat pipe section 11, a first transition duct 12 installed on one side of the first flat pipe section 11, a fan section 13 installed on one side of the first transition duct 12, a second transition duct 14 installed on one side of the fan section 13, and a second flat pipe section 15 installed on one side of the second transition duct 14; a micro duct fan is installed inside the fan section 13; the first flat pipe section 11 is an air inlet for the air flow, the bottom of the second flat pipe section 15 is close to the heat source 3, and the second flat pipe section 15 is an air outlet for the air flow; the air flow enters the metal pipe 1 through the air inlet, and is discharged from the air outlet through the micro duct fan.

[0036] Furthermore, a metal pipe 1 is used as an air duct for air flow in and out. The metal pipe 1 is a low-impedance air duct, and the system flow rate is much higher than that of the centrifugal fan and the high-impedance air duct in the prior art. Therefore, the heat dissipation of the air-cooling and heat dissipation system is improved, the volume of the air-cooling and heat dissipation system is reduced, and the power of the electronic equipment can be further improved. The present invention also installs a micro-duct fan inside the fan section 13, so that the micro-duct fan is in a fully enclosed state, which can improve the dustproof and waterproof performance of the air-cooling and heat dissipation system.

[0037] like Figure 3 and Figure 5 As shown, the first flat tube segment 11 and the second flat tube segment 15 have the same structure and the same cross section. The cross-sectional area of ​​the flow passage of the first flat tube segment 11 and the second flat tube segment 15 is S1. Figure 4As shown, the cross-sectional area of ​​the flow channel of the fan segment 13 is S2; the ratio of the cross-sectional area S1 of the flow channels of the first flat tube segment 11 and the second flat tube segment 15 to the cross-sectional area S2 of the flow channel of the fan segment 13 is between 0.6 and 1.2; the above ratio can reduce the local pressure loss of the airflow, thereby further increasing the volume of the airflow entering the metal pipe 1, and at the same time can increase the heat dissipation of the air-cooled heat dissipation system and improve the efficiency of the micro duct fan.

[0038] The second flat tube section 15 is made of a metal material component with good thermal conductivity; specifically, the second flat tube section 15 is a copper alloy material component or an aluminum alloy material component; since the bottom of the second flat tube section 15 is a plane and is in close contact with the heat source 3, it serves as a heat absorption plane; the use of a metal material component with good thermal conductivity can absorb heat from the heat source 3 more quickly; and transfer the absorbed heat to the surrounding of the metal pipe 1; dissipate heat more quickly and improve the heat dissipation efficiency.

[0039] Furthermore, the first flat pipe segment 11, the first transition duct 12, the fan segment 13, the second transition duct 14 and the second flat pipe segment 15 are spliced ​​together, or the first flat pipe segment 11 and the first transition duct 12, the second transition duct 14 and the second flat pipe segment 15 are integrally formed or connected together by gluing or welding; further, the first transition duct 12 and the fan segment 13, and the fan segment 13 and the second transition duct 14 are connected together by gluing or welding.

[0040] like Figures 6 to 8 As shown, the air-cooled heat dissipation system can adopt a variety of duct fans, for example: a miniature single-stage duct axial flow fan 4, a miniature two-stage duct axial flow fan 5 or a miniature single-screw fan 6; the fan can be flexibly selected according to the pressure or flow required by the heat dissipation equipment, so that the heat dissipation system is suitable for various working conditions.

[0041] like Figure 6 As shown, the micro duct fan is a micro single-stage duct axial flow fan 4; the micro single-stage duct axial flow fan 4 includes a shell 41, and the shell 41 is cylindrical; a micro DC brushless motor 42 is installed inside the shell 41; a motor bracket 43 is installed between the shell 41 and the micro DC brushless motor 42, and the motor bracket 43 is used to support the micro DC brushless motor 42; a motor shaft core 44 is also installed at one end of the micro DC brushless motor 42; an axial flow impeller 45 is installed on the motor shaft core 44, and the micro DC brushless motor 42 is also connected to a wire 46 for providing power to the micro DC brushless motor 42.

[0042] like Figure 7As shown, the micro duct fan is a micro two-stage duct axial flow fan 5; the micro two-stage duct axial flow fan 5 includes a shell 41, and the shell 41 is cylindrical; a micro DC brushless motor 42 is installed inside the shell 41; a motor bracket 43 is installed between the shell 41 and the micro DC brushless motor 42, and the motor bracket 43 is used to support the micro DC brushless motor 42; motor shaft cores 44 are installed at both ends of the micro DC brushless motor 42; an axial flow impeller 45 is installed on the motor shaft core 44, and the micro DC brushless motor 42 is also connected to a wire 46 for providing power to the micro DC brushless motor 42.

[0043] like Figure 8 and 9 As shown, the micro duct fan is a micro single-screw fan 6; the micro single-screw fan 6 includes a shell 41, and the shell 41 is cylindrical; a micro DC brushless motor 42 is installed inside the shell 41; a motor bracket 43 is installed between the shell 41 and the micro DC brushless motor 42, and the motor bracket 43 is used to support the micro DC brushless motor 42; a motor shaft core 44 is installed at one end of the micro DC brushless motor 42; a screw rotor 47 is installed on the motor shaft core 44, and a bearing 48 is installed at the end of the motor shaft core 44, and the bearing 48 is installed inside the bearing bracket 49, and the bearing bracket 49 is connected to the shell 41; the micro DC brushless motor 42 is also connected to a wire 46 for providing power to the micro DC brushless motor 42.

[0044] The air-cooling heat dissipation system adopts a micro duct fan; and the micro duct fan adopts a micro DC brushless motor 42; the volume of the air-cooling heat dissipation system is reduced, so the diameter of the air-cooling heat dissipation system does not exceed 8.5mm, which fully meets the special condition of limited internal space of handheld electronic devices.

[0045] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An air cooling system for handheld electronic devices, characterized in that: The invention comprises a metal pipe (1) and a micro-duct fan installed inside the metal pipe (1); the metal pipe (1) comprises a first flat pipe section (11), a first transition pipe (12) installed on one side of the first flat pipe section (11), a fan section (13) installed on one side of the first transition pipe (12), a second transition pipe (14) installed on one side of the fan section (13), and a second flat pipe section (15) installed on one side of the second transition pipe (14); the micro-duct fan is installed inside the fan section (13); the first flat pipe section (11) is an air inlet for the air flow, and the bottom of the second flat pipe section (15) is in close contact with a heat source (3); the second flat pipe section (15) is an air outlet for the air flow; the air flow enters the metal pipe (1) through the air inlet, and is discharged from the air outlet by the micro-duct fan; The cross-sectional area of ​​the flow passages of the first flat tube section (11) and the second flat tube section (15) is S1, the cross-sectional area of ​​the flow passage of the fan section (13) is S2, and the ratio of the cross-sectional area S1 of the flow passages of the first flat tube section (11) and the second flat tube section (15) to the cross-sectional area S2 of the flow passage of the fan section (13) is between 0.6 and 1.

2.

2. The air cooling and heat dissipation system for a handheld electronic device according to claim 1, characterized in that: The second flat tube section (15) is a copper alloy material component or an aluminum alloy material component.

3. The air cooling and heat dissipation system for a handheld electronic device according to claim 1, characterized in that: The first transition duct (12) and the fan section (13) as well as the fan section (13) and the second transition duct (14) are connected together by gluing or welding.

4. The air cooling and heat dissipation system for a handheld electronic device according to claim 1, characterized in that: The bottom of the second flat tube section (15) is a plane and is in close contact with the heat source (3) to serve as a heat absorption plane.

5. The air cooling and heat dissipation system for a handheld electronic device according to claim 1, characterized in that: The micro duct fan is a micro single-stage duct axial flow fan (4), a micro two-stage duct axial flow fan (5), or a micro single-screw fan (6).

6. The air cooling and heat dissipation system for a handheld electronic device according to claim 5, characterized in that: The micro duct fan is a micro single-stage duct axial flow fan (4); the micro single-stage duct axial flow fan (4) comprises a housing (41), the housing (41) being cylindrical; a micro brushless DC motor (42) is mounted inside the housing (41); a motor bracket (43) is mounted between the housing (41) and the micro brushless DC motor (42), the motor bracket (43) being used to support the micro brushless DC motor (42); a motor shaft core (44) is also mounted at one end of the micro brushless DC motor (42); an axial flow impeller (45) is mounted on the motor shaft core (44), and a wire (46) for providing power to the micro brushless DC motor (42) is also connected to the micro brushless DC motor (42).

7. The air cooling and heat dissipation system for a handheld electronic device according to claim 5, characterized in that: The micro duct fan is a micro two-stage duct axial flow fan (5); the micro two-stage duct axial flow fan (5) comprises a housing (41), the housing (41) being cylindrical; a micro DC brushless motor (42) is mounted inside the housing (41); a motor bracket (43) is mounted between the housing (41) and the micro DC brushless motor (42), the motor bracket (43) being used to support the micro DC brushless motor (42); motor shaft cores (44) are mounted at both ends of the micro DC brushless motor (42); an axial flow impeller (45) is mounted on the motor shaft core (44), and a wire (46) for providing power to the micro DC brushless motor (42) is also connected to the micro DC brushless motor (42).

8. The air cooling and heat dissipation system for a handheld electronic device according to claim 5, characterized in that: The micro duct fan is a micro single screw fan (6); the micro single screw fan (6) comprises a housing (41), the housing (41) being cylindrical; a micro brushless DC motor (42) is mounted inside the housing (41); a motor bracket (43) is mounted between the housing (41) and the micro brushless DC motor (42), the motor bracket (43) being used to support the micro brushless DC motor (42); a motor shaft core (44) is mounted at one end of the micro brushless DC motor (42); a screw rotor (47) is mounted on the motor shaft core (44), a bearing (48) is mounted at the end of the motor shaft core (44), the bearing (48) is mounted inside a bearing bracket (49), and the bearing bracket (49) is connected to the housing (41); a wire (46) for providing power to the micro brushless DC motor (42) is also connected to the micro brushless DC motor (42).

9. The air cooling and heat dissipation system for a handheld electronic device according to claim 1, characterized in that: The diameter of the air-cooling heat dissipation system does not exceed 8.5 mm.

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