TWI780756B - Series fan - Google Patents

Abstract

A series fan includes a first fan and a second fan. The first fan includes a first frame body, a first dynamic blade impeller and a first shaft seat. Two sides of the first frame body are respectively formed with a wind incoming side and a connection side. The first shaft seat is disposed at a center of the wind incoming side. A first static blade is disposed between the first shaft seat and inner circumference of the first frame body. The first dynamic blade impeller is pivotally disposed on the first shaft seat and has multiple first dynamic blades. Each first dynamic blade has at least one connection section. The second fan includes a second frame body, a second dynamic blade impeller and a second shaft seat. Two sides of the second frame body are respectively formed with a wind outgoing side and a mating side mated with the connection side in communication therewith. The second shaft seat is disposed at a center of the wind outgoing side. A second static blade is disposed between the second shaft seat and inner circumference of the second frame body. The second dynamic blade impeller is pivotally disposed on the second shaft seat and has multiple second dynamic blades. Each second dynamic blade has at least one connected section. The connected section of the second dynamic blade is integrally connected with the connection section of the first dynamic blade to form a driving blade. The first fan is upside-down placed and serially connected with the second fan. The driving blade has the form of a continuous blade so as to effectively enhance the wind pressure of the entire series fan.

Description

series fan

The present invention relates to a series fan, especially a series fan that combines two moving blades of the series fan into a continuous blade type active blade, thereby increasing the effect of wind pressure.

With the advancement of technology, people's dependence on various electronic devices has also increased; however, the components inside electronic products (such as computers, notebook computers) will generate high heat during operation. If the heat cannot be exported to electronic products in time In addition, it is easy to cause overheating problems. Therefore, most electronic products often use a fan for active cooling, so that electronic products can maintain a certain operating temperature range. However, sometimes a single fan is required. The wind power that can be provided is slightly insufficient, so two or more fans are often assembled in series to form a series fan, so as to be able to provide sufficient wind power.

However, the generally known series fans are arranged in series with the front and rear fans. The main structural components are arranged in sequence from the air inlet to the air outlet. Among them, the front-stage vane of the front fan and the rear-stage vane of the rear fan are the best supporting components of the series fan, but the front-stage vane of the front fan and the rear-stage vane of the rear fan are arranged between the series fan In the middle position, it is easy to cause the structural support of the front-stage rotor blades of the front fan and the rear-stage rotor blades of the rear fan to be relatively weak, that is, the structural support of the air inlet and air outlet of the serial fan is relatively weak.

When the existing tandem fan is fixed to the electronic device, the electronic device and the air inlet or outlet of the tandem fan are assembled with each other, but there is no supporting structure for the front stage rotor blade and the rear stage rotor blade at the air inlet and air outlet. Under the support, it is easy to cause the overall vibration value of the series fan to increase, which in turn affects the system stability of the entire series fan.

In addition, the position of the front-stage rotor blade and the rear-stage rotor blade is open at the air inlet and outlet. Therefore, based on safety considerations, an additional guard is installed at the air inlet and outlet of the series fan. The network is used for protection, which leads to a relatively high cost of materials and man-hours for the series fans as a whole.

Furthermore, when the conventional serial fan is arranged on an electronic device, its corresponding assembly height is fixed and limited, so its overall thickness is also limited, that is to say, the design of the serial fan is limited by the front, The configuration of the middle motor of the rear fan and the front and rear stator blades makes the overall height and size of the tandem fan designed in a fixed ratio. Relatively, the blades of the front stage rotor blade and the rear stage rotor blade are also fixed in size and size ratio. In addition, the front and rear stage moving blades are restricted by the intermediate elements (ie, the front and rear stage stationary blades) and the fixed size configuration, so that the front and rear stage moving blades cannot be made into non-single continuous blades with separate and independent rotating blades. Therefore, when the front and rear stage moving blades only pressurize the inflowing airflow through their fixed-sized blades, the airflow is thrown out by their respective blades (ie, the front and rear stage moving blades) before the airflow is pressurized, causing the front and rear stages The time for the stage blades to pressurize the inflowing airflow is too short to effectively increase the wind pressure of the overall series fan.

One purpose of the present invention is to provide a series fan that can increase the overall wind pressure effect of the series fan.

To achieve the above object, the present invention provides a series fan, which includes a first fan and a second fan, the first fan includes a first frame, a first moving impeller and a first shaft seat, the first The two sides of the frame are respectively formed with an air inlet side and a connection side, and the first shaft seat is arranged at the center of the air inlet side, And there is a first vane arranged between the inner side of the first frame body, the first rotor wheel system is pivotally arranged on the first shaft seat, and it has a plurality of first rotor blades, each of which is provided with At least one connecting portion; the second fan includes a second frame body, a second moving impeller and a second shaft seat, and the two sides of the second frame body are respectively formed with an air outlet side and an abutting side, and the abutting side The connecting side is butted and communicated with each other, the second shaft seat is arranged at the center of the air outlet side, and a second vane is arranged between the inner side of the second frame body, and the second rotor wheel system Pivoted on the second shaft seat, it has a plurality of second moving blades, and each of the second moving blades is provided with at least one joint portion, so that the joint portion of each of the second moving blades is connected to the connection of each of the first moving blades The parts are connected together to form a driving blade, and the second fan is connected in series with the inverted first fan; through the design of the series fan of the present invention, the overall wind pressure effect of the series fan can be effectively improved.

The above-mentioned connection side has a first opening, the first impeller is provided with a first hub and a first shaft, one end of the first shaft is fixed at the center of the first hub, and the other end is connected to the first hub. The shaft seats are pivotally arranged, and the plurality of first rotor blades are arranged radially on the outer peripheral side of the first hub, each of the first rotor blades is provided with a blade leading edge and a blade trailing edge, and the connecting part is arranged at the blade leading edge , and the leading edge of the blade protrudes, shrinks or is flush with the first opening, and the trailing edge of the blade is located on the wind inlet side.

The above-mentioned butting side has a second opening communicating with the first opening. The second impeller is provided with a second hub and a second shaft. One end of the second shaft is fixed at the center of the second hub. The other end is pivoted to the second shaft seat, and the plurality of second moving blades are arranged radially on the outer peripheral side of the second hub, and each of the second moving blades is provided with a blade leading edge and a blade trailing edge, and the joint portion It is provided on the blade leading edge of each of the second rotor blades, and the blade leading edge of each of the second rotor blades protrudes from the second opening into the first opening, or is flush with or recessed in the first opening Two openings, the blade trailing edge of each second moving blade is located on the wind outlet side.

Each of the above-mentioned first moving blades is provided with a first upper surface and a first lower surface, each of the second moving blades is provided with a second upper surface and a second lower surface, and the first upper surface is connected to the second upper surface A continuous upper surface is formed, and the first lower surface is connected with the second lower surface to form a continuous lower surface.

The connection between the above-mentioned joint part and the connecting part is a matching concave-convex structure or any manner that can be combined with each other, such as a convex-concave structure, a screw-lock structure, a fitting structure, a snap-fit structure or an adhesive structure or a welding structure.

The connecting side of the above-mentioned first frame body and the docking side of the second frame body are connected in a manner of snapping, locking, fitting, bonding, sliding rail or fastening.

The connecting side has a first opening, and a first flow channel is defined between the air inlet side and the first opening, and the first flow channel communicates with the air inlet side and the first opening respectively.

The abutting side has a second opening communicating with the first opening, a second flow channel is defined between the air outlet side and the second opening, and the second flow channel communicates with the air outlet side and the second opening respectively, Moreover, the first and second flow channels communicate with each other to jointly form a guide flow channel, and the active vane is located in the flow guide channel. The first moving impeller and the second moving impeller are integrally injection molded.

1: Serial fan

11, 21: the first and second fans

111, 211: the first and second frames

1111: wind side

2111: Outlet side

1113: connection side

2113: docking side

1114, 2114: first and second openings

12, 22: the first and second runners

13, 23: the first and second impellers

131, 231: the first and second moving blades

1311: connection part

2311: junction

1313, 2313: blade leading edge

1314, 2314: blade trailing edge

1315, 2315: the first and second upper surfaces

1316, 2316: the first and second lower surfaces

132, 232: the first and second hub

133: The first axis

15, 25: the first and second shaft seats

16, 26: the first and second stationary leaves

17, 27: Stator

18: Magnetic parts

31:Active blade

4: Airflow

Fig. 1 is an exploded perspective view of an embodiment of the present invention.

Fig. 2A is a combined perspective view of an embodiment of the present invention.

Fig. 2B is a schematic diagram of the continuous pressurization of the airflow by the active blades according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the combination of the connection part and the joint part in another embodiment of one embodiment of the present invention.

The above-mentioned purpose of the present invention and its structural and functional characteristics will be described based on the preferred embodiments of the accompanying drawings.

The present invention provides a serial fan, please refer to Figures 1, 2A and 2B, the serial fan 1 includes a first fan 11 and a second fan 21, the first fan 11 includes a first frame body 111, a first The moving impeller 13 and a first shaft seat 15, the two sides of the first frame body 111 are respectively formed with a wind inlet side 1111 and a connecting side 1113, the connecting side 1113 has a first opening 1114, the first opening 1114 is A first flow channel 12 is defined between the air inlet side 1111, and the first flow channel 12 communicates with the air inlet side 1111 and the first opening 1114 respectively, and the air inlet side 1111 is used to guide the external airflow 4 to flow into the air inlet side 1111. The first flow passage 12 of the first frame body 111 is guided into the second fan 21 through the first opening 1114 .

The first shaft seat 15 is arranged at the center of the wind inlet side 1111, and a first vane 16 is arranged between the first shaft seat 15 and the inner side of the first frame body 111, and the first vane 16 is located at At the wind inlet side 1111, the first vane 16 in this embodiment is a rib, and the two ends of the first vane 16 are respectively connected to the outer peripheral side of the first shaft seat 15 and the inner side of the first frame body 111 for illustration, but It is not limited to this. In practice, the first vane 16 can be a vane. The first moving impeller 13 is pivotally arranged on the first shaft seat 15 and is located in the first flow passage 12. The first moving impeller 13 has a plurality of first moving blades 131, a first hub 132, a fixed Sub 17 and a first axis 133, one end of the first axis 133 is fixed at the center of the first hub 132, and the other end of the first axis 133 is pivoted with the first axle seat 15 , the plurality of first moving blades 131 are arranged radially on the outer peripheral side of the first hub 132, the stator 17 of the first moving blade wheel 13 is sleeved on the outer peripheral side of a shaft cylinder of the first shaft seat 15, and the stator 17 and a magnetic member 18 (such as a magnet) disposed inside the first hub 132 are excited in response.

Each of the first rotor blades 131 is provided with a blade leading edge 1313, a blade trailing edge 1314, a first upper surface 1315, a first lower surface 1316 and at least one connecting portion 1311. The blade leading edge 1313 of the first rotor blade 131 and the blade trailing edge 1314 are respectively located at the first opening 1114 of the connecting side 1113 and the wind inlet side 1111, and the leading edge 1313 of the blade can be selected to protrude, shrink or be flush with the first opening 1114, and the connecting portion 1311 is arranged on the blade leading edge 1313 of the first moving blade 131 .

The second fan 21 includes a second frame body 211, a second moving impeller 23, and a second shaft seat 25. Two sides of the second frame body 211 are respectively formed with an air outlet side 2111 and a pair of abutment sides 2113. The docking side 2113 is connected to the connecting side 1113 and communicated with each other. The connecting side 1113 of the first frame body 111 and the docking side 2113 of the second frame body 211 can be selected as engaging, locking, fitting, Adhesion, sliding rail or fastening, so that the first fan 11 is inverted and connected in series with the second fan 21 to form the serial fan 1 .

The abutting side 2113 has a second opening 2114, and the second opening 2114 is used to guide the airflow flowing out of the first opening 1114, so that the flow of the airflow is continuous, and the connection between the second opening 2114 and the air outlet side 2111 A second flow channel 22 is defined between them, and the second flow channel 22 communicates with the air outlet side 2111 and the first and second openings 1114, 2114 respectively, and the first and second flow channels 12, 22 communicate with each other to form a guide Flow runner. The air outlet side 2111 is used to discharge the pressurized (pressurized) airflow 4 in the guide flow channel to forcibly dissipate heat from a heating element (such as a central processing unit or a graphics processing unit).

The second shaft seat 25 is arranged at the center of the air outlet side 2111, and a second vane 26 is provided between the inner side of the second frame body 211. In this embodiment, the second vane 26 is a The rib is located at the air outlet side 2111 , that is, the two ends of the second vane 26 are respectively connected to the outer peripheral side of the second shaft seat 25 and the inner side of the second frame body 211 , but it is not limited thereto. During specific implementation, the first and second stationary blades 16, 26 can be adjusted to have the same structure (such as ribs) or different structures (such as one being a rib) according to the design of the supercharging or the overall support of the series fan 1. , and the other is a static leaf). Through the first and second stator blades 16, 26 respectively arranged on the air inlet side 1111 and the air outlet side 2111 of the series fan, the support strength of the overall structure of the fan can be effectively improved, and the overall vibration of the series fan 1 can be avoided. The first and second stationary vanes 16 and 26 are used to shield and protect the first and second moving impellers 13 and 23, effectively improving the conventional problem of increasing the cost of materials and man-hours due to the need to add additional protective nets.

The second impeller 23 is pivotally arranged on the second shaft seat 25 and is located in the second flow channel 22. The second impeller 23 has a plurality of second impellers 231, a second hub 232, and a stator 27. And a second axis (not shown), one end of the second axis is fixed at the center of the second hub 232, and the other end is pivoted with the second shaft seat 25. The stator 27 is sleeved on the outer peripheral side of a shaft cylinder of the second shaft seat 25, and is excited in response to a magnetic member (such as a magnet; not shown in the figure) arranged on the inner side of the second hub 232, and the first hub 132 and the second hub 232 are set upside down.

The plurality of second rotor blades 231 are arranged radially on the outer peripheral side of the second hub 232, each of the second rotor blades 231 is provided with a blade leading edge 2313, a blade trailing edge 2314, a second upper surface 2315, at least one The joint portion 2311 and a second lower surface 2316, wherein the blade leading edge 2313 and the blade trailing edge 2314 are respectively located at the second opening 2114 of the abutting side 2113 and the air outlet side 2111, and each of the second rotor blades 231 of the The leading edge 2313 of the blade protrudes from the second opening 2114 into the first opening 1114, or is flush (or retracted) to the second opening 2114, and the joint portion 2311 is arranged on each of the first openings 1114. The blade leading edge 2313 of the second rotor blade 231, in this embodiment, the connection portion 1311 of the first rotor blade 131 and the joint portion 2311 of the second rotor blade 231 are connected to form a matching concave-convex structure description, which is the first rotor blade The connecting portion 1311 of 131 is a convex body and the joint portion 2311 of the second moving blade 231 is connected as a concave hole, so that the connecting portion 1311 of the plurality of first moving blades 131 and the combining portion 2311 of the plurality of second moving blades 231 A plurality of active blades 31 are combined to form a continuous blade shape, and the first upper surface 1315 is connected to the second upper surface 2315 and there is no gap between the joints to form a continuous upper surface, and the first lower surface 1316 is connected to the second upper surface 2315. The second lower surface 2316 and the joints without gaps form a continuous lower surface.

Referring to Figures 1 and 2B, when the serial fan 1 is in operation, the first and second moving impellers 13 and 23 will rotate synchronously, and the plurality of driving blades 31 in the continuous blade shape in the diversion channel The outside airflow 4 will be guided axially through the wind inlet side 1111 into the first flow channel 12 of the guide flow channel, so that the airflow 4 will be drawn by the airflow After the blade trailing edge 1314 of the first moving blade 131 of the plurality of active blades 31 is guided in, the plurality of first moving blades 131 will pressurize the airflow 4 and flow along the first upper surface 1315 toward the blade leading edge 1313 At this time, the pressurized airflow 4 flows to the blade leading edge 1313 of the first rotor blade 131 and continues to flow continuously on the second upper surface 2315 , and is then driven by the second rotor blade in the second flow channel 22 231 is pressurized again, and the repressurized airflow 4 is thrown (flowed out) downward at a certain speed along the second upper surface 2315 toward the blade trailing edge 2314, and passes through the second vane 26 to 2111 outside the air outlet side.

In another embodiment, the connection between the connecting portion 1311 and the combining portion 2311 can be selected as a matching concave-convex structure (as shown in FIG. catch).

In an alternative embodiment, the first hub 132 of the first moving impeller 13 and the plurality of first moving blades 131 on it and the second hub 232 of the second moving impeller 23 and the plurality of second moving blades 231 on it are integrally injection molded .

Therefore, through the combination of the plurality of first and second movable blades 131, 231 of the series fan 1 of the present invention to form a plurality of active blades 31 in a continuous blade shape, the air flow 4 can be driven by the plurality of moving blades in the guide flow channel. The first and second rotor blades 131 and 231 of the active blade 31 are pressurized continuously to effectively increase the overall wind pressure effect of the serial fan 1 .

1: Serial fan

11, 21: the first and second fans

111, 211: the first and second frames

1111: wind side

2111: Outlet side

1113: connection side

2113: docking side

2114: second opening

12, 22: the first and second runners

13, 23: the first and second impellers

131, 231: the first and second moving blades

1311: connection part

2311: junction

1313, 2313: blade leading edge

1314, 2314: blade trailing edge

1315, 2315: the first and second upper surfaces

1316, 2316: the first and second lower surfaces

132, 232: the first and second hub

133: The first axis

15, 25: the first and second shaft seats

16, 26: the first and second stationary leaves

17, 27: Stator

18: Magnetic parts

31:Active blade

Claims (10)

A serial fan, comprising: a first fan, including a first frame body, a first moving impeller and a first shaft seat, the two sides of the first frame body are respectively formed with a wind inlet side and a connection side, the The first shaft seat is arranged at the center of the air inlet side, and has a shaft cylinder on its upper side. A stator blade, the first moving blade wheel system is pivotally arranged on the first shaft seat, and has a first hub and a plurality of first moving blade systems arranged on the outer peripheral side of the first hub, and the first hub cover is arranged on the The outer periphery of the stator, and its inner side is provided with a magnetic part which is inductively excited relative to the stator, and each of the first moving blades is provided with at least one connecting portion; a second fan includes a second frame, a second moving impeller and A second shaft seat, the two sides of the second frame are respectively formed with an air outlet side and a pair of docking sides, the docking side is connected to the connection side and communicated with each other, the second shaft seat is arranged in the center of the air outlet side There is a shaft tube on its upper side, a stator is sheathed on the outside of the shaft tube of the second shaft seat, and a second vane is provided between the second shaft seat and the inner side of the second frame body, the first The two moving blade wheel systems are pivotally arranged on the second shaft seat, and have a second hub and a plurality of second moving blade systems arranged on the outer peripheral side of the second hub, and the second hub cover is arranged on the second shaft seat. The outer periphery of the stator, and its inner side is provided with a magnetic part which is inductively excited with the stator on the second shaft seat, each of the second moving blades is provided with at least one joint portion, and the joint portion of each of the second moving blades is connected to the The connecting parts of each of the first moving blades are connected together to form a driving blade, and the second fan is connected in series with the inverted first fan. The serial fan as described in item 1 of the scope of the patent application, wherein the connection side has a first opening, the first impeller is provided with a first shaft, and one end of the first shaft is fixed on the first wheel hub At the center, the other end is pivoted to the first shaft seat, and the plurality of first moving blades are in the form of Radially arranged on the outer peripheral side of the first hub, each of the first moving blades is provided with a blade leading edge and a blade trailing edge, the connecting part is arranged on the blade leading edge, and the blade leading edge is protruding, concave or Aligned with the first opening, the trailing edge of the blade is located at the wind inlet side. The serial fan as described in item 2 of the scope of the patent application, wherein the abutting side has a second opening communicating with the first opening, the second impeller is provided with a second shaft, and one end of the second shaft is fixed At the center of the second hub, the other end is pivoted to the second shaft seat, and the plurality of second rotor blades are arranged radially on the outer peripheral side of the second hub, and each second rotor blade is provided with a blade The leading edge and a blade trailing edge, the junction is provided at the leading edge of each second rotor blade, and the blade leading edge of each second rotor blade protrudes from the second opening into the first opening or The trailing edge of each of the second moving blades is located at the air outlet side, being flush with or recessed in the second opening. The tandem fan as described in item 1 of the scope of the patent application, wherein each of the first moving blades is provided with a first upper surface and a first lower surface, and each of the second moving blades is provided with a second upper surface and a second lower surface The first upper surface is connected to the second upper surface to form a continuous upper surface, and the first lower surface is connected to the second lower surface to form a continuous lower surface. The tandem fan as described in item 1 of the scope of the patent application, wherein the connecting part and the connecting part are in the form of a matching concave-convex structure, convex-concave structure, screw-lock structure, embedded structure or adhesive structure. The serial fan described in item 1 of the scope of the patent application, wherein the connecting part and the connecting part are connected as a whole through a welding method. The tandem fan described in item 1 of the scope of the patent application, wherein the connecting side of the first frame body and the docking side of the second frame body are abutted by snapping, locking, fitting, bonding, sliding rails or snap fit. The tandem fan as described in item 1 of the scope of the patent application, wherein the connection side has a first opening, and a first flow channel is defined between the air inlet side and the first opening, and the first flow channels communicate with the air inlet side respectively with that first opening. The serial fan described in item 8 of the scope of the patent application, wherein the abutting side has a second opening communicating with the first opening, a second flow channel is defined between the air outlet side and the second opening, and the second The flow passages respectively communicate with the air outlet side and the second opening, and the first and second flow passages communicate with each other to form a guide flow passage, and the active blade is located in the flow guide passage. The tandem fan described in item 1 of the scope of the patent application, wherein the first moving impeller and the second moving impeller are integrally injection molded.

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