CN102465894B - fan - Google Patents

Abstract

A fan includes a fan frame and a motor. A containing space is formed inside the fan frame, and at least one air inlet and at least one air outlet connected to the containing space are provided. The motor is combined with the containing space of the fan frame. The motor includes a stator and a fan wheel. The fan wheel is rotatably combined with the stator. The fan wheel is provided with a hub and a plurality of blades. The hub has a top surface. Each of the blades is located on the top surface of the hub. In the radial direction of the fan wheel, each of the blades has a first end and a second end opposite to each other. The first end of each blade is arranged outward, and a flow guide space is formed between the second ends of each blade. In this way, the occurrence of turbulence phenomenon can be effectively prevented, and the heat dissipation effect can be improved.

Description

fan

technical field

The present invention relates to a fan, in particular to a fan capable of introducing and exporting air flow in a radial direction in the radial direction of the fan wheel.

Background technique

Existing fans generally include two types: axial flow fans and blower fans. The axial flow fan has an axial air inlet and an axial air outlet opposite to each other in the axial direction, so as to introduce air flow through the axial air inlet, and then export air flow through the axial air outlet, thereby providing heat dissipation; Also, the blower fan has an axial air inlet in the axial direction, and a radial air outlet in the radial direction, so that the airflow is introduced through the axial air inlet, and then exported laterally through the radial air outlet. Airflow, while also having the function of heat dissipation.

However, as far as the axial flow fan is concerned, since it can only guide the airflow toward the axial direction for heat dissipation, it cannot guide the airflow toward the radial direction for heat dissipation; therefore, when the axial flow fan is used in various When electronic products must be assembled above the heat source (such as the top surface of the central processing unit of a personal computer), the axial height of the electronic product cannot be reduced; The air outlet guides the airflow laterally, but the axial air inlet must still be used to introduce the airflow. Therefore, it is not suitable for electronic products (such as mobile phones or personal digital assistants, etc.) that must introduce airflow through the side direction.

For this reason, there is also an existing fan on the market that can introduce and export airflow radially in the radial direction of the fan wheel, so as to be suitable for electronic products that must introduce airflow through the side direction. As shown in FIG. 1 , it is a new patent case of "Horizontal Convection Fan Structure" announced by Taiwan, China No. 553323. The existing fan 8 includes a shell base 81 and a fan wheel 82 . The shell seat 81 has at least one air inlet 811 and at least one air outlet 812, and a horizontal airflow passage 813 is arranged between the air inlet 811 and the air outlet 812; the fan wheel 82 is arranged on the horizontal airflow passage 813, and the fan wheel 82 has a hub 821, and the outer peripheral surface of the hub 821 forms several blades 822; thereby, when the fan wheel 82 rotates, a gas pressure difference is generated between the air inlet 811 and the air outlet 812, so that the air inlet 811 and the air outlet 812 generate convection along the horizontal airflow channel 813 and dissipate heat.

However, when the fan wheel 82 of the existing fan 8 is installed in the horizontal airflow passage 813, when the blade 822 of the fan wheel 82 guides the airflow to generate convection along the horizontal airflow passage 813, due to the fan wheel 82 The hub 821 of the hub 821 is also located in the horizontal airflow channel 813, therefore, the airflow guided by the blades 822 of the fan wheel 82 will be easily hindered by the hub 821, thereby generating turbulence and reducing the overall performance of the existing fan 8. heat radiation.

Again, as shown in Figure 2, it is the No. 477492 "Combination Structure of Blower Fan" patent in Taiwan, China. This existing fan 9 includes a rotor seat 91, a fan wheel 92 and a casing 93. The rotor base 91 has several protrusions 911; the fan wheel 92 has several concave holes 921, and the concave holes 921 are combined with the protrusions 911; the casing 93 can accommodate the rotor base 91 and the fan wheel 92, And the housing 93 is provided with an air inlet 931 and an air outlet 932; thereby, when the fan wheel 92 rotates, the airflow can also be guided to the inside of the housing 93 through the air inlet 931 in a radial direction, and pass through the air inlet 931. The air outlet 932 guides the airflow to dissipate heat.

However, since the rotor seat 91 and the fan wheel 92 of the existing fan 9 are located in the airflow channel formed between the air inlet 931 and the air outlet 932, the airflow guided by the fan wheel 92 is also easily affected by the fan wheel 92. The obstruction of the rotor base 91 produces a disturbance phenomenon; moreover, the fan wheel 92 must be assembled with the rotor base 91 separately, which also causes a lot of inconvenience in assembly and use.

Contents of the invention

The present invention provides a fan, which can effectively prevent the airflow from being hindered when the fan wheel introduces and exports the airflow in the radial direction, which is the main purpose of the invention.

According to the present invention, the fan includes a fan frame and a motor. An accommodating space is formed inside the fan frame, and at least one side air inlet and at least one side air outlet communicating with the accommodating space are provided; the motor is combined with the accommodating space of the fan frame, and the motor includes a stator and a A fan wheel, the fan wheel is rotatably combined with the stator, the fan wheel is provided with a hub and several blades, the hub has a top surface, and the blades are respectively located on the top surface of the hub, in the radial direction of the fan wheel, Each of the vanes has a first end and a second end opposite to each other. The first ends of each vane are set outward, and a flow guide space is formed between the second ends of each vane.

As mentioned above, when the fan wheel guides the airflow into and out of the fan frame through the side air inlet and the side air outlet, each blade of the fan according to the present invention extends toward the sealing part and exceeds the top surface of the hub, As well as the structural design of the diversion space, etc., can effectively prevent the occurrence of turbulent flow, so as to achieve the effect of improving the heat dissipation effect.

Description of drawings

Figure 1: An exploded perspective view of the existing first type of fan.

Figure 2: An exploded perspective view of the existing second type of fan.

Fig. 3: An exploded perspective view of the fan according to the first embodiment of the present invention.

Fig. 4: An assembled sectional view of the fan according to the first embodiment of the present invention.

Fig. 5: An exploded perspective view of the fan according to the second embodiment of the present invention.

Fig. 6: An assembled sectional view of the fan according to the second embodiment of the present invention.

Description of main component symbols:

1 fan frame 1a receiving part 1b closing part 1c side wall part

11 Accommodating space 12 Side air inlet 13 Side air outlet 2 Motor

21 Stator 22 Fan wheel 221 Hub 221a Base plate

221b ring wall 222 blade 222a first end 222b second end

223 top surface 23 diversion space 3 fan frame 3a receiving part

3b Closed part 3c Side wall part 31 Accommodating space 32 Side air inlet

33 Side air outlet 34 Groove 4 Motor 41 Stator

42 fan wheel 421 wheel hub 421a base plate 421b ring wall

422 blade 422a first end 422b second end 423 top surface

43 Air diversion space 44 Side channel 45 Chassis 8 Fan

81 Housing seat 811 Air inlet 812 Air outlet 813 Horizontal airflow channel

82 fan wheel 821 hub 822 blade 9 fan

91 Rotor seat 911 Protrusion 92 Fan wheel 921 Concave hole

93 Shell 931 Air inlet 932 Air outlet

Detailed ways

In order to make the above-mentioned and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are specifically cited below, together with the accompanying drawings, as follows:

Referring to FIGS. 3 and 4 , the fan according to the first embodiment of the present invention includes a fan frame 1 and a motor 2 . The fan frame 1 is a frame structure capable of allowing airflow to flow in a radial direction; the motor 2 is combined inside the fan frame 1 .

The fan frame 1 can be any hollow frame structure capable of accommodating the motor 2 and allowing air flow to be introduced and exported in a radial direction. Wherein the fan frame 1 at least includes a receiving portion 1a, a closing portion 1b and a side wall portion 1c, the receiving portion 1a is spaced opposite to the closing portion 1b, and the side wall portion 1c is located between the receiving portion 1a and the closing portion 1b and between the receiving portion 1a, the closing portion 1b and the side wall portion 1c, an accommodating space 11 is formed, and the side wall portion 1c is provided with at least one side air inlet 12 and at least one side air outlet 13, the At least one air inlet 12 and at least one air outlet 13 communicate with the accommodating space 11 .

In this embodiment, the receiving part 1a is a base, the side wall part 1c is several side walls axially extending from the side edge of the base and adjacent to each other, and the closing part 1b is a cover plate, the cover The plate is combined with the top edge of the side wall (mainly according to the direction of the drawing), and the accommodation space 11 is formed between the cover plate and the base (the side wall surrounds the accommodation space 11), the side air inlet 12 and The side air outlets 13 are respectively arranged on the side walls and communicate with the accommodating space 11; wherein the side air inlets 12 and the side air outlets 13 can be respectively arranged on two adjacent side walls as shown in FIG. opposite side walls.

The motor 2 is combined with the fan frame 1. The motor 2 includes a stator 21 and a fan wheel 22 (ie, a rotor). The stator 21 is used to drive the fan wheel 22 to rotate. This fan wheel 22 is provided with a hub 221 and several blades 222, and this hub 221 has a top surface 223, and this top surface 223 faces this sealing part 1b; Above, each of the vanes 222 extends toward the sealing portion 1 b and exceeds the top surface 223 of the hub 221 . Moreover, in the radial direction of the fan wheel 22, each of the blades 222 has a first end 222a and a second end 222b opposite to each other, wherein the first end 222a of each of the blades 222 faces the side wall portion 1c, and each of the blades 222 A flow guide space 23 is formed between the second ends 222b of the blades 222 (that is, the second ends 222b of the blades 222 are not connected).

In this embodiment, the stator 21 of the motor 2 is combined with the receiving portion 1a of the fan frame 1, and the hub 221 of the fan wheel 22 is rotatably combined with the stator 21, wherein the hub 221 consists of a base plate 221a and a ring wall 221b, the top surface 223 is located on the base plate 221a, and the ring wall 221b surrounds the outer periphery of the base plate 221a. Moreover, each of the vanes 222 is combined with the top surface 223 of the base plate 221a as shown in the figure; or the vanes 222 can be partially extended to the outer peripheral surface of the ring wall 221b in addition to being combined with the top surface 223 of the base plate 221a; Furthermore, in this embodiment, the blade 222 is integrally combined with the top surface 223 of the base plate 221a to improve the convenience of assembly.

When the fan of the present invention is actually used, the alternating magnetic field generated by the stator 21 of the motor 2 can be used to drive the fan wheel 22 to rotate; thereby, when the fan can be installed in various electronic products, the fan wheel 22 The blades 222 can introduce the outside air from the side air inlet 12, so as to enter the inside of the fan frame 1, and then lead out to the outside space through the side air outlet 13, so as to provide predetermined heat dissipation for the heat sources generated during the operation of various electronic products effect.

The main technical feature of the fan of the present invention is that in the radial direction of the fan wheel 22, the airflow can be introduced and exported through the side air inlet 12 and the side air outlet 13 in the radial direction. Therefore, when the fan is applied to various electronic products In this case, it does not need to be assembled above the heat source, so that the axial height of the electronic product can be reduced, and the fan can also provide a better auxiliary heat dissipation effect for the heat source around the side air outlet 13; In the axial direction of the wheel 22, each of the blades 222 extends toward the closed portion 1b and exceeds the top surface 223 of the hub 221. Therefore, the fan wheel 22 can smoothly guide the airflow through the side air inlet 12 and the side outlet. The tuyeres 13 come in and out to dissipate heat, so as to prevent the hub 221 from obstructing the circulation of the airflow; more importantly, since the air guiding space 23 is also formed between the second ends 222b of each of the blades 222, it will ensure that the airflow passes through The process of each blade 222 is less prone to turbulent flow, so as to improve the overall heat dissipation effect.

Please refer to FIGS. 5 and 6 , which disclose a fan according to a second embodiment of the present invention. The fan also includes a fan frame 3 and a motor 4 .

The receiving part 3a, the closing part 3b, the side wall part 3c, the accommodating space 31, the side air inlet 32, the side air outlet 33, the stator 41, and the fan wheel respectively disclosed by the fan frame 3 and the motor 4 of the second embodiment of the present invention 42. The hub 421, the base plate 421a, the ring wall 421b, the blade 422, the first end 422a, the second end 422b, the top surface 423 and the flow guide space 43 are the same as the receiving part 1a, the sealing part 1b, the side of the first embodiment. Wall 1c, accommodation space 11, side air inlet 12, side air outlet 13, stator 21, fan wheel 22, hub 221, base plate 221a, ring wall 221b, blade 222, first end 222a, second end 222b, top The surface 223 and the flow guide space 23 are substantially the same, and will not be repeated here.

The receiving part 3a disclosed in the second embodiment of the present invention is also a base, the side wall part 3c is several side walls extending from the side edge of the base and adjacent to each other, and the closing part 3b is a cover plate. The main differences between the fan of this embodiment and the fan of the first embodiment are:

The center of the receiving portion 3a is provided with a groove 34, and the hub 421 of the motor 4 is accommodated in the groove 34; and the accommodating space 31 can be located between the top surface 423 of the fan wheel 42 and the sealing portion 3b. Partition a side flow channel 44, each of the blades 422 is located in the side flow channel 44, to ensure that the side flow channel 44 only has blades 422, and the side air inlet 32 and the side air outlet 33 are as shown in Figure 5 As shown, they are respectively arranged on the two opposite side walls (side wall parts 3c); wherein in the axial direction of the fan wheel 42, the opening height h of the side air inlet 32 and the side air outlet 33 is located between the sealing part 3b and the Between the horizontal positions of the top surface 423, the side air inlet 32 and the side air outlet 33 can be respectively positioned at the positions of the blades 422 of the fan wheel 42, so that the hub 421 can be relatively located at the two side walls (side wall portion 3c) Thereby, since the hub 421 is located outside the lateral flow channel 44, it can be ensured that the lateral flow channel 44 only has blades 422. Therefore, when the fan wheel 42 introduces airflow through the side air inlet 32, the airflow It will be less likely to be hindered by the hub 421 to further improve the cooling effect.

Also as shown in FIG. 6, in the radial direction of the fan wheel 42, a first end 422a of each blade 422 can also extend radially toward the side wall portion 1c and beyond the hub 421, so as to increase the overall wind-dispelling area; Furthermore, when each of the blades 422 exceeds the hub 421, the bottom edge of each of the blades 422 (mainly in the drawing) can further form a chassis 45, and the chassis 45 is connected to the hub 421 to increase the structure of the blades 422. Strength, and can improve the diversion effect.

As mentioned above, when the fan wheel 22, 42 guides the airflow to enter and exit the fan frame 1, 3 through the side air inlet 12, 32 and the side air outlet 13, 33, each blade 222, 422 respectively extend toward the closed portion 1b, 3b and beyond the top surface 223 of the hub 221, and the structural design of the flow guide space 23, 43 can effectively prevent the occurrence of turbulent flow, so as to improve the effect of heat dissipation.

Claims (11)

1. A fan, characterized in that it comprises: A fan frame, forming an accommodating space inside, and having at least one side air inlet and at least one side air outlet communicating with the accommodating space; and A motor, combined with the accommodation space of the fan frame, the motor includes a stator and a fan wheel, the fan wheel is rotatably combined with the stator, the fan wheel is provided with a hub and several blades, the hub has a top Each of the blades is located on the top surface of the hub. In the radial direction of the fan wheel, each of the blades has a first end and a second end opposite to each other. The first ends of each blade are set outward, and each A flow guiding space is formed between the second ends of the blades; Wherein the fan frame includes a receiving part, a closing part and a side wall part, the side wall part is located between the receiving part and the closing part, and the accommodating space is formed between the receiving part, the closing part and the side wall part , the top surface of the hub faces the sealing portion, each of the blades extends axially toward the sealing portion and exceeds the top surface of the hub, and the surface of the sealing portion facing the flow guiding space is flat without protrusions, The first end of each blade faces the side wall; wherein the bottom surface of the hub axially extends a ring wall, the stator is arranged in the space surrounded by the ring wall, and in the radial direction of the fan wheel, each blade The first end extends radially toward the side wall portion and beyond the annular wall of the hub. 2 . The fan according to claim 1 , wherein, in the axial direction of the fan wheel, the opening height of the side air inlet is located between the closing portion and the horizontal position of the top surface. 3 . 3 . The fan according to claim 1 , wherein, in the axial direction of the fan wheel, the opening height of the side air outlet is located between the closing portion and the horizontal position of the top surface. 4 . 4. The fan according to claim 2, wherein the pair of side air inlets are located at the blades of the fan wheel. 5. The fan according to claim 3, wherein the pair of side air outlets are located at the blades of the fan wheel. 6 . The fan according to claim 1 , 2 , 3 , 4 or 5 , characterized in that, a lateral channel is defined in the accommodating space between the top surface of the fan wheel and the sealing portion, and each The vane is located within the lateral channel. 7. The fan according to claim 1, 2, 3, 4 or 5, wherein the receiving portion forms a groove, the groove is located in the accommodating space, the stator of the motor is combined with the groove, The hub of the fan wheel is accommodated in the groove. 8. The fan according to claim 1, 2, 3, 4 or 5, wherein the receiving portion is a base, and the side wall portion is a number of axially extending from the side edge of the base and adjacent to each other A side wall, the closing part is a cover plate, the cover plate is combined with the side wall, and the accommodating space is formed between the cover plate and the base, the side air inlet and the side air outlet are respectively arranged on two adjacent side wall. 9. The fan according to claim 1, 2, 3, 4 or 5, wherein the receiving portion is a base, and the side wall portion is a number of axially extending from the side edge of the base and adjacent to each other A side wall, the closing part is a cover plate, the cover plate is combined with the side wall, and the accommodating space is formed between the cover plate and the base, the side air inlet and the side air outlet are respectively arranged on two opposite sides a side wall. 10. The fan according to claim 1, 2, 3, 4 or 5, characterized in that the blade is integrally combined with the top surface of the hub. 11. The fan according to claim 1, 2, 3, 4 or 5, wherein the bottom edge of each blade forms a chassis, and the chassis is connected to the hub.