Series fan

Abstract

A series fan includes a first fan and a second fan. The first fan includes a first frame body with a wind incoming side and a connection side at two sides, a first dynamic blade impeller and a first shaft seat. The first dynamic blade impeller is pivotally disposed on the first shaft seat and has first dynamic blades. 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 formed with a wind outgoing side and a mating side mated with the connection side in communication therewith. The second dynamic blade impeller is pivotally disposed on the second shaft seat and has second dynamic blades. At least one connected section of the second dynamic blade is integrally connected with at least one connection section of the first dynamic blade to form a driving blade.

Claims

1. A series fan comprising: a first fan including a first frame body, a first dynamic blade impeller and a first shaft seat, two sides of the first frame body being respectively formed with a wind incoming side and a connection side, the first shaft seat being disposed at a center of the wind incoming side, a first static blade being disposed between the first shaft seat and inner circumference of the first frame body, the first dynamic blade impeller being pivotally disposed on the first shaft seat, the first dynamic blade impeller having multiple first dynamic blades, each first dynamic blade having at least one connection section; and a second fan including a second frame body, a second dynamic blade impeller and a second shaft seat, two sides of the second frame body being respectively formed with a wind outgoing side and a mating side, the mating side being mated with the connection side in communication therewith, the second shaft seat being disposed at a center of the wind outgoing side, a second static blade being disposed between the second shaft seat and inner circumference of the second frame body, the second dynamic blade impeller being pivotally disposed on the second shaft seat, the second dynamic blade impeller having multiple second dynamic blades, each second dynamic blade having at least one connected section, the connected section of the second dynamic blade being integrally connected with the connection section of the first dynamic blade to form a driving blade, the first fan being upside-down placed and serially connected with the second fan.

2. The series fan as claimed in claim 1, wherein the connection side has a first opening, the first dynamic blade impeller having a first hub and a first shaft, one end of the first shaft being fixedly disposed at a center of the first hub, the other end of the first shaft being pivotally disposed in the first shaft seat, the multiple first dynamic blades being radially disposed along outer circumference of the first hub, each first dynamic blade having a blade front edge and a blade tail edge, the connection section being disposed on the blade front edge, the blade front edge being protruded from, recessed into or flush with the first opening, the blade tail edge being positioned in the wind incoming side.

3. The series fan as claimed in claim 2, wherein the mating side has a second opening in communication with the first opening, the second dynamic blade impeller having a second hub and a second shaft, one end of the second shaft being fixedly disposed at a center of the second hub, the other end of the second shaft being pivotally disposed in the second shaft seat, the multiple second dynamic blades being radially disposed along outer circumference of the second hub, each second dynamic blade having a blade front edge and a blade tail edge, the connected section being disposed on the blade front edge of the second dynamic blade, the blade front edge of the second dynamic blade being protruded from the second opening into the first opening, flush with the second opening or recessed into the second opening, the blade tail edge of the second dynamic blade being positioned in the wind outgoing side.

4. The series fan as claimed in claim 1, wherein each first dynamic blade has a first upper surface and a first lower surface and each second dynamic blade has a second upper surface and a second lower surface, the first upper surface being connected with the second upper surface to form a continuous upper surface, the first lower surface being connected with the second lower surface to form a continuous lower surface.

5. The series fan as claimed in claim 1, wherein the connection section and the connected section are selected from a group consisting of raised structure and recessed structure in adaptation to the raised structure, recessed structure and raised structure in adaptation to the recessed structure, screw structures, insertion structures and adhesion structures.

6. The series fan as claimed in claim 1, wherein the connection section and the connected section are integrally connected with each other by means of welding.

7. The series fan as claimed in claim 1, wherein the connection side of the first frame body is mated with the mating side of the second frame body by means of engagement, locking, insertion, adhesion, slide rail or latching.

8. The series fan as claimed in claim 1, wherein the connection side has a first opening, a first flow way being defined between the wind incoming side and the first opening, the first flow way being in communication with the wind incoming side and the first opening.

9. The series fan as claimed in claim 8, wherein the mating side has a second opening in communication with the first opening, a second flow way being defined between the wind outgoing side and the second opening, the second flow way being in communication with the wind outgoing side and the second opening, the first and second flow ways being in communication with each other to together form an airflow guide passage, the driving blade being positioned in the airflow guide passage.

10. The series fan as claimed in claim 1, wherein the first dynamic blade impeller and the second dynamic blade impeller are formed by means of integral injection molding.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

(2) FIG. 1 is a perspective exploded view of a preferred embodiment of the present invention;

(3) FIG. 2A is a perspective assembled view of the preferred embodiment of the present invention;

(4) FIG. 2B is a sectional view of the preferred embodiment of the present invention, showing that the airflow is continuously pressurized by the driving blades; and

(5) FIG. 3 is a perspective view of the preferred embodiment of the present invention, showing the connection form of the connection section and the connected section, in which the connection section and the connected section are raised structure and recessed structure in adaptation to the raised structure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(6) Please refer to FIGS. 1, 2A and 2B. The series fan 1 of the present invention includes a first fan 11 and a second fan 21. The first fan 11 includes a first frame body 111, a first dynamic blade impeller 13 and a first shaft seat 15. Two sides of the first frame body 111 are respectively formed with a wind incoming side 1111 and a connection side 1113. The connection side 1113 has a first opening 1114. The first opening 1114 and the wind incoming side 1111 define therebetween a first flow way 12 in communication with the wind incoming side 1111 and the first opening 1114. The wind incoming side 1111 serves to guide external airflow 4 to flow into the first flow way 12 of the first frame body 111. The airflow is then guided out by the first opening 1114 to flow into the second fan 21.

(7) The first shaft seat 15 is disposed at the center of the wind incoming side 1111. A first static blade 16 is disposed between the first shaft seat 15 and inner circumference of the first frame body 111. The first static blade 16 is positioned at the wind incoming side 1111. In this embodiment, the first static blade 16 is a rib. Two ends of the first static blade 16 are, but not limited to, respectively connected with outer circumference of the first shaft seat 15 and the inner circumference of the first frame body 111 for illustration purposes. In practice, the first static blade 16 can be a blade. The first dynamic blade impeller 13 is pivotally disposed on the first shaft seat 15 and positioned in the first flow way 12. The first dynamic blade impeller 13 has multiple first dynamic blades 131, a first hub 132, a stator 17 and a first shaft 133. One end of the first shaft 133 is fixedly disposed at the center of the first hub 132. The other end of the first shaft 133 is pivotally disposed in the first shaft seat 15. The multiple first dynamic blades 131 are radially disposed along outer circumference of the first hub 132. The stator 17 of the first dynamic blade impeller 13 is fitted around a bearing cup of the first shaft seat 15. A magnetic member 18 (such as a magnet) is disposed on inner circumference of the first hub 132. The stator 17 and the magnetic member 18 are magnetized with each other by induction.

(8) Each first dynamic blade 131 has a blade front edge 1313, a blade tail edge 1314, a first upper surface 1315, a first lower surface 1316 and at least one connection section 1311. The blade front edge 1313 and the blade tail edge 1314 of the first dynamic blade 131 are respectively positioned in the first opening 1114 of the connection side 1113 and the wind incoming side 1111. The blade front edge 1313 can be selectively protruded from, recessed into or flush with the first opening 1114. The connection section 1311 is disposed on the blade front edge 1313 of the first dynamic blade 131.

(9) The second fan 21 includes a second frame body 211, a second dynamic blade impeller 23 and a second shaft seat 25. Two sides of the second frame body 211 are respectively formed with a wind outgoing side 2111 and a mating side 2113. The mating side 2113 is mated with the connection side 1113 in communication therewith. The connection side 1113 of the first frame body 111 is mated with the mating side 2113 of the second frame body 211 by means of engagement, locking, insertion, adhesion, slide rail or latching, whereby the first fan 11 is upside-down placed and serially connected with the second fan 21 to form the series fan 1.

(10) The mating side 2113 has a second opening 2114. The second opening 2114 serves to further guide the airflow flowing from the first opening 1114, whereby the airflow can continuously flow. The second opening 2114 and the wind outgoing side 2111 define therebetween a second flow way 22 in communication with the wind outgoing side 2111 and the first and second openings 1114, 2114. The first and second flow ways 12, 22 communicate with each other to together form an airflow guide passage. The wind outgoing side 2111 serves to discharge the airflow 4, which is boosted (pressurized) in the airflow guide passage so as to forcedly dissipate the heat generated by a heat generation component (such as a central processing unit or graphics processing unit).

(11) The second shaft seat 25 is disposed at the center of the wind outgoing side 2111. A second static blade 26 is disposed between the second shaft seat 25 and inner circumference of the second frame body 211. In this embodiment, the second static blade 26 is a rib positioned at the wind outgoing side 2111. Two ends of the second static blade 26 are, but not limited to, respectively connected with outer circumference of the second shaft seat 25 and the inner circumference of the second frame body 211. In practice, the first and second static blades 16, 26 can be adjusted into same structure (such as both are ribs) or different structures (such as one is a rib, while the other is a static blade) according to the design requirement of the boosting or entire supportability of the series fan 1. The first and second static blades 16, 26 are respectively disposed in the wind incoming side 1111 and the wind outgoing side 2111 of the series fan 1 so that the supporting strength of the entire structure of the series fan 1 is effectively enhanced. Also, the vibration of the entire series fan 1 can be avoided. Moreover, the first and second static blades 16, 26 serve to shield and protect the first and second dynamic blade impellers 13, 23 so as to effectively improve the shortcoming of the conventional series fan that a protection web must be additionally arranged to cause increase of cost of material and working time.

(12) The second dynamic blade impeller 23 is pivotally disposed on the second shaft seat 25 and positioned in the second flow way 22. The second dynamic blade impeller 23 has multiple second dynamic blades 231, a second hub 232, a stator 27 and a second shaft (not shown). One end of the second shaft is fixedly disposed at the center of the second hub 232. The other end of the second shaft is pivotally disposed in the second shaft seat 25. The stator 17 is fitted around a bearing cup of the second shaft seat 25. A magnetic member (such as a magnet, not shown) is disposed on inner circumference of the second hub 232. The stator 17 and the magnetic member are magnetized with each other by induction. The first hub 132 and the second hub 232 are upside-down arranged.

(13) The multiple second dynamic blades 231 are radially disposed along outer circumference of the second hub 232. Each second dynamic blade 231 has a blade front edge 2313, a blade tail edge 2314, a second upper surface 2315, at least one connected section 2311 and a second lower surface 2316. The blade front edge 2313 and the blade tail edge 2314 are respectively positioned in the second opening 2114 of the mating side 2113 and the wind outgoing side 2111. The blade front edge 2313 of the second dynamic blade 231 can be selectively protruded from the second opening 2114 into the first opening 1114 or flush with (or recessed into) the second opening 2114. The connected section 2311 is disposed on the blade front edge 2313 of the second dynamic blade 231. In this embodiment, the connection section 1311 of the first dynamic blade 131 and the connected section 2311 of the second dynamic blade 231 are raised structure and recessed structure in adaptation to the raised structure for illustration purposes. That is, the connection section 1311 of the first dynamic blade 131 is a boss body, while the connected section 2311 of the second dynamic blade 231 is a dent, which is connected with the boss body. Accordingly, the connection sections 1311 of the multiple first dynamic blades 131 and the connected sections 2311 of the multiple second dynamic blades 231 are integrally connected to form multiple driving blades 31 in a continuous blade form. In addition, the first upper surface 1315 is connected with the second upper surface 2315 without any gap in the junction between the first upper surface 1315 and the second upper surface 2315 so as to form a continuous upper surface. The first lower surface 1316 is connected with the second lower surface 2316 without any gap in the junction between the first lower surface 1316 and the second lower surface 2316 so as to form a continuous lower surface.

(14) Please refer to FIGS. 1 and 2B. When the series fan 1 operates, the first and second dynamic blade impellers 13, 23 will synchronously rotate. The multiple driving blades 31 in the continuous blade form in the airflow guide passage will guide the external airflow 4 to axially pass through the wind incoming side 1111 into the first flow way 12 of the airflow guide passage. After the airflow 4 is guided in by the blade tail edges 1314 of the first dynamic blades 131 of the multiple driving blades 31, the multiple first dynamic blades 131 will pressurize the airflow 4 to flow along the first upper surfaces 1315 in a direction to the blade front edges 1313. At this time, the pressurized airflow 4 flows to the blade front edges 1313 of the first dynamic blades 131 to further continuously flow to the second upper surface 2315, whereby the second dynamic blades 231 in the second flow way 22 further pressurizes the airflow 4. The further pressurized airflow 4 flows along the second upper surfaces 2315 in a direction to the blade tail edges 1314. Then the airflow 4 is downward thrown out (flow out) at a certain speed to pass through the second static blade 26 to outer side of the wind outgoing side 2111.

(15) In another embodiment, the connection section 1311 and the connected section 2311 are selected from a group consisting of raised structure and recessed structure in adaptation to the raised structure (as shown in FIG. 3), screw structures, insertion structures, adhesion structures and welding structures (connected by means of welding).

(16) In a modified embodiment, the first hub 132 of the first dynamic blade impeller 13 and the multiple first dynamic blades 131 thereon and the second hub 232 of the second dynamic blade impeller 23 and the multiple second dynamic blades 231 thereon are formed by means of integral injection molding.

(17) According to the above design, the multiple first and second dynamic blades 131, 231 of the series fan 1 of the present invention are integrally connected to form multiple driving blades 31 in a continuous blade form.

(18) In this case, the airflow 4 can be continuously pressurized by the first and second dynamic blades 131, 231 of the multiple driving blades 31 in the airflow guide passage so as to effectively greatly enhance the wind pressure of the entire series fan 1.

(19) The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in such as the form or layout pattern or practicing step of the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.