TWI391566B - Anti-backflow housing - Google Patents

Description

Anti-backflow fan frame

The invention relates to a backflow prevention fan frame, in particular to a motor and a fan wheel to form a heat dissipation fan, and has a backflow prevention fan frame for preventing backflow and dustproof effect of air.

Please refer to FIG. 1 for the patent of No. I318862, "Fence and Fan Frame for Preventing Backflow". The fan frame has a fan body 81 and a plurality of check pieces 82. The fan body 81 has an air outlet. The side portion 811 has a support portion 812 extending from the periphery of the air outlet side 811, and the inner wall surface of the support portion 812 is provided with a plurality of fixing portions 813. Each of the check pieces 82 is provided with a convex member 821 and a notch 822. The member 821 is a convex columnar body, and the notch 822 is adjacent to the protruding member 821.

When assembling the respective check pieces 82 to the fan body 81, it is necessary to design the notch 822 on each of the check pieces 82 to press the protrusion 821 to be retracted and first forced into the inner wall surface of the support portion 812. Then, it is then inserted into the fixing portion 813. However, the convex member 821 and the notch 822 are designed to cause the structural strength of the check piece 82 to be poor, so that the convex member 821 is easily broken during the compression and contraction, and the convex member 821 is located on the support. When the inner wall surface of the portion 812 is between, the protruding member 821 is less likely to be aligned with the fixing portion 813, which makes assembly difficult. Moreover, after the respective check pieces 82 are assembled to the fan body 81, since the check pieces 82 are sandwiched between the support portions 812, it is difficult to assemble the check pieces 82 after the fan body 81 is assembled. Disassembled. In addition, the protruding member 821 is a protruding columnar body, and the notch 822 is further disposed adjacent to the protruding member 821, so that the structure of the check piece 82 is complicated and the manufacturing is not easy.

Referring to FIG. 2 again, it is a patent of the "fan backflow mechanism" of the publication No. I271144, which has a frame body 91 and a plurality of blocking portions 92. The frame body 91 has an outlet 911, and the periphery of the outlet 911 A plurality of pivoting portions 912 are defined, and each of the pivoting portions 912 has a through hole 913. One end of each of the side portions of the blocking portion 92 is formed with a notch 921, and each of the notches 921 is provided with a slot 921. The convex portion 922 is a convex columnar body, so that the convex portion 922 of each of the blocking portions 92 can be inserted into the through hole 913 of the frame 91, and the blocking portion 92 is covered by the outlet 911. .

However, the convex portion 922 of the conventional structure has a convex columnar body, so that it is easy to be broken during assembly or disassembly. Moreover, the blocking portion 92 is provided with a convex portion 922 in a notch 921, which makes the structure of the blocking portion 92 complicated and difficult to manufacture.

The object of the present invention is to solve the disadvantages of prior art assembly and to provide an anti-backflow fan frame that is easy to assemble.

The second object of the present invention is to solve the shortcomings of the prior art structural strength to provide a backflow prevention fan frame with good structural strength.

Another object of the present invention is to solve the disadvantages of the prior art that the structure is complicated and the fabrication is not easy, so as to provide a backflow prevention fan frame which is compact in structure and easy to manufacture.

Still another object of the present invention is to solve the disadvantages of prior art disassembly difficulties to provide an anti-backflow fan frame that is easy to disassemble.

According to the present invention, a backflow prevention fan frame includes: a frame body having a chamber, an air inlet portion, and an air outlet portion, the chamber being formed in the frame body, the air inlet portion and the air outlet portion being disposed The frame body is connected to the chamber respectively; a pivoting member is disposed on a surface of the frame adjacent to the air outlet portion, the pivoting member has a hook portion, one end of the hook portion is disposed on the surface, and the other end is disposed on the surface a free end, the free end and the surface are formed with an opening; and a baffle is disposed at the air outlet portion, the baffle has a button hole, and the button hole does not communicate with any side of the baffle And the hook portion of the pivoting member passes through the buckle hole.

The above and other objects, features and advantages of the present invention will become more <RTIgt; It is to be noted that the anti-backflow fan frame of the first embodiment of the present invention comprises a frame body 1, at least one pivoting member 2 and a baffle 3. The number of the pivoting elements 2 may be one or more, and the preferred embodiment is two. The two pivoting members 2 are disposed on the frame body 1. The baffle plate 3 is pivotally disposed on the two pivoting members 2 to provide a function of preventing backflow and dust of air.

The housing 1 has a chamber 11 , an air inlet portion 12 and an air outlet portion 13 . The chamber 11 is formed inside the frame body 1 , and the air inlet portion 12 and the air outlet portion 13 are disposed on the frame body 1 . The frame 1 is connected to the chamber 11 respectively. The frame 1 may be a one-piece member, or may be composed of at least two members, and the two members may be a combination of a frame and a cover, or may be two frames of the same shape and symmetrical to each other. The combination. In this embodiment, the frame 1 is composed of an upper frame 14 and a lower frame 15. The upper frame 14 and the lower frame 15 each have a receiving groove 11a, 11b and an air outlet 13a. 13b, and the air outlets 13a, 13b communicate with the accommodating grooves 11a, 11b. The air inlet portion 12 is preferably disposed on the upper frame body 14 , and when the upper frame body 14 and the lower frame body 15 are aligned with each other, the two receiving grooves 11 a and 11 b together form the chamber 11 . The two air outlets 13a, 13b together constitute the air outlet portion 13, and the chamber 11 is provided with a motor 4 and a fan wheel 5 to constitute a heat dissipation fan.

Further, as shown in FIGS. 3 and 4, the two pivoting members 2 are disposed on the air outlet portion 13 of the casing 1, and are preferably disposed on the inner surface of the upper casing 14 adjacent to the air outlet 13a. The two pivoting elements 2 may be integrally connected to the frame body 1 or may be separate members separate from the frame body 1 and coupled to the frame body 1 by assembly. In this embodiment, the two pivoting members 2 each have a substrate 21, and the substrate 21 is provided with a hook portion 22, the hook portion 22 is connected to the substrate 21 at one end, and the free end 23 is formed at the other end. An opening 24 is formed between the end 23 and the substrate 21 . A pivot hole 221 is defined between the substrate 21 and the hook portion 22 , and the pivot hole 221 is in communication with the opening 24 .

Referring to the fourth, sixth, and seventh embodiments, the upper frame 14 is provided with two assembly holes 16 adjacent to the inner surface of the air outlet 13a, so that the substrates 21 of the two pivoting members 2 are respectively disposed in the two assembly holes. In the 16th, the hook portions 22 of the two pivotal members 2 are positioned inside the air outlet portion 13 of the casing 1. In addition, the openings 24 formed between the free ends 23 of the two pivoting members 2 and the substrate 21 can be oriented in the same or different directions. In this embodiment, the openings 24 of the two pivoting members 2 are oriented in the same direction.

Furthermore, the inner edge of the two assembly holes 16 is provided with a first latching portion 161 and a first positioning portion 162. The first latching portion 161 is a ridge, and the first positioning portion 162 is a recess. A second latching portion 25 and a second positioning portion 26 are disposed on the outer periphery of the substrate 21 of the two pivotal components 2, the second latching portion 25 is a card slot, and the second positioning portion 26 is a bump. . Thereby, the rib is embedded by the card slot, so that the substrate 21 can be coupled into the assembly hole 16, and the groove and the bump can be designed to limit the mounting of the substrate 21 and the assembly hole 16. direction.

The baffle 3 has an opposite windward surface 31 and a leeward surface 32. The baffle 3 is provided with two fastening holes 33 extending through the windward surface 31 and the leeward surface 32, and the two fastening holes 33 are not opposite to the baffle plate 33. Any one of the three sides is connected. The two fastening holes 33 are preferably adjacent to one side edge 30 of the baffle plate 3, and a pivoting portion 34 is formed between the two fastening holes 33 and the side edge 30. The two pivoting portions 34 can be respectively The two opening portions 24 of the two pivoting members 2 are respectively inserted into the pivoting holes 221, and the two hook portions 22 are respectively passed through the two fastening holes 33, so that the two pivoting portions 34 can be respectively hooked and positioned by the two hook portions 22. And the baffle 3 can cover the air outlet portion 13. The pivoting portion 34 is preferably formed in a column shape, and both ends of the pivoting portion 34 are coupled to the baffle 3 itself. The width of the two pivoting members 2 from the free end 23 to the opening 24 of the substrate 21 is preferably It is smaller than the minimum outer diameter of the pivoting portion 34 to prevent the pivoting portion 34 from coming out of the opening 24. When the baffle plate 3 is disposed on the two pivoting members 2, the windward surface 31 faces the air inlet portion 12, the leeward surface 32 faces the air outlet portion 13, and the leeward surface 32 is provided with a top portion 35. The frame 35 can be abutted against the top 35. In addition, the frame body 1 is further provided with a stopping portion 17 which can abut the windward surface 31 of the baffle 3, and the stopping portion 17 is preferably disposed adjacent to the air outlet of the lower frame 15 The inner surface of 13b.

Referring to Figures 6 to 8, when the baffle 3 is assembled with the two pivoting members 2, the two pivoting portions 34 of the baffle 3 are forced into the pivot by the openings 24 of the two pivoting members 2, respectively. And the two hook portions 22 are respectively passed through the two fastening holes 33, so that the two pivoting portions 34 can be hooked by the two hook portions 22 respectively, and the baffle plate 3 can be the two pivoting portions. 34 swings back and forth at a specific angle for the center of rotation. When the motor 4 has not driven the fan wheel 5 to rotate, the baffle 3 naturally hangs down by gravity, and the stop portion 17 of the lower frame 15 abuts against the windward surface 31 of the baffle 3 to The baffle 3 is limited to a position covering the air outlet portion 13 (as shown in Fig. 6).

When the motor 4 drives the fan wheel 5 to rotate, air can be taken in by the air inlet portion 12 and blown out by the air outlet portion 13. When the air is intended to pass through the air outlet portion 13, the air force acts on the windward surface 31 of the baffle plate 3, and the baffle plate 3 can be simultaneously pushed to swing toward the side with the pivot portion 34 as a center of rotation. The baffle 3 is in an open state, and air is smoothly blown out from the air outlet portion 13 (as shown in Fig. 8). At this time, the abutting top 35 of the leeward surface 32 of the baffle 3 can contact the inner surface of the upper frame 14 to prevent the baffle 3 from directly colliding with the upper frame 14 to be damaged.

When the fan wheel 5 stops rotating, the baffle plate 3 returns to the position abutting the stop portion 17 of the lower frame body 15, so that the baffle plate 3 is again covered by the air outlet portion 13 to prevent air. Countercurrent and dustproof.

The baffle 3 of the present invention is provided with a buttonhole 33 adjacent to one side 30, such that a pivoting portion 34 is formed between the baffle hole 33 and the side edge 30, and both ends of the pivoting portion 34 are The baffle 3 itself is coupled, and therefore, the baffle 3 is not only simple in structure, easy to manufacture, but also has the advantage of good structural strength. Moreover, when the baffle 3 is assembled with the pivoting member 2, the hook portion 22 passes through the buckle hole 33, and the pivot portion 34 is forced by the opening 24 and hooked by the hook portion 22, In the case of disassembly, the pivoting portion 34 can be pulled out through the opening 24 in the opposite direction, which is convenient for assembly or disassembly.

The present invention can be applied to an axial fan frame or an air blower fan frame. However, the air blower fan frame is mostly formed with an air outlet passage. Since the baffle plate of the present invention has the advantages of easy assembly and disassembly, even if it is disposed at the outlet The operation of assembling and disassembling is also not affected in the air passage, so the present invention is preferably applied to an air blower fan frame.

Referring to Fig. 9, the anti-backflow fan frame of the second embodiment of the present invention also includes a frame 1, two pivoting members 2' and a baffle 3. The pivoting member 2' of the second embodiment is the same as the pivoting member 2 disclosed in the first embodiment, and thus the pivoting member 2' of the second embodiment is the same as the first embodiment. Structural features include a substrate 21', a hook portion 22', a pivot hole 221', a free end 23', an opening 24', a second latch portion 25', and a second positioning portion 26'.

The opening 24' of the two pivotal members 2' of the second embodiment faces in different directions, and preferably the two openings 24' are disposed in opposite directions. The pivoting portion 34 of the baffle 3 can also be forced into the opening 24' of the two pivoting members 2', respectively, and the two hook portions 22' can pass through the latching holes 33 of the baffle 3, respectively. Since the openings 24' of the two pivotal members 2' are oriented in opposite directions, the pivoting portion 34 of the shutter 3 is not easily disengaged from the opening 24'.

As described above, the baffle 3 of the present invention is provided with a buttonhole 33 adjacent to one side 30, such that a pivoting portion 34 is formed between the baffle hole 33 and the side edge 30, and two of the pivoting portions 34 are formed. The end is connected to the baffle 3 itself, so that the pivoting portion 34 has better structural strength, is not easily broken during assembly or disassembly, and the baffle 3 has a simple structure and is easy to manufacture.

When the baffle 3 of the present invention is assembled with the pivoting member 2, 2', the hook portion 22, 22' passes through the buckle hole 33, and the pivot portion 34 is forced by the opening 24, 24' Moreover, when the hook portions 22, 22' are hooked, when the detachment is performed, the pivoting portion 34 is pulled out through the openings 24, 24' in the opposite direction, which is convenient for assembly or disassembly.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

[this invention]

1. . . framework

11. . . Room

11a. . . Locating slot

11b. . . Locating slot

12. . . Into the wind department

13. . . Ventilation department

13a. . . Air outlet

13b. . . Air outlet

14. . . Upper frame

15. . . Lower frame

16. . . Assembly hole

161. . . First card

162. . . First positioning part

17. . . Stop

2. . . Pivot component

twenty one. . . Substrate

twenty two. . . Hook

221. . . Pivot hole

twenty three. . . Free end

twenty four. . . Opening

25. . . Second card

26. . . Second positioning part

2'. . . Pivot component

twenty one'. . . Substrate

twenty two'. . . Hook

221’. . . Pivot hole

twenty three'. . . Free end

twenty four'. . . Opening

25’. . . Second card

26’. . . Second positioning part

3. . . Baffle

30. . . Side

31. . . Windward side

32. . . Leeward side

33. . . Buckle hole

34. . . Pivot

35. . . To the top

4. . . motor

5. . . Fan wheel

[知知]

81. . . Fan body

811. . . Ventilation side

812. . . Support

813. . . Fixed part

82. . . Stop film

821. . . Projection

822. . . Missing slot

91. . . framework

911. . . Export

912. . . Pivot

913. . . Through hole

92. . . Stop

921. . . Missing slot

922. . . Convex

Fig. 1: An exploded perspective view of the patent No. I318862.

Figure 2: A perspective view of the patent No. I271144.

Fig. 3 is an exploded perspective view showing the first embodiment of the present invention.

Figure 4: A partial enlarged view of Fig. 3.

Figure 5 is a top plan view of a first embodiment of the present invention.

Figure 6 is a side cross-sectional view showing a first embodiment of the present invention.

Figure 7: A partial enlarged view of Fig. 6.

Figure 8 is a schematic view showing the operation of the first embodiment of the present invention.

Figure 9 is a perspective exploded view of a second embodiment of the present invention.

1. . . framework

11. . . Room

11a. . . Locating slot

11b. . . Locating slot

12. . . Into the wind department

13. . . Ventilation department

13a. . . Air outlet

13b. . . Air outlet

14. . . Upper frame

15. . . Lower frame

16. . . Assembly hole

161. . . First card

162. . . First positioning part

17. . . Stop

2. . . Pivot component

twenty one. . . Substrate

twenty two. . . Hook

221. . . Pivot hole

twenty three. . . Free end

twenty four. . . Opening

25. . . Second card

26. . . Second positioning part

3. . . Baffle

30. . . Side

31. . . Windward side

32. . . Leeward side

33. . . Buckle hole

34. . . Pivot

35. . . To the top

4. . . motor

5. . . Fan wheel

Claims (15)

The anti-backflow fan frame comprises: a frame body having a chamber, an air inlet portion and an air outlet portion, the chamber being formed in the frame, the body, the air inlet portion and the air outlet portion being disposed on the The frame body is connected to the chamber respectively; a pivoting member is disposed on a surface of the frame adjacent to the air outlet portion, the pivoting member has a hook portion, and one end of the hook portion is disposed on the surface, and the other end is free An open end and the surface are formed with an opening; and a baffle is disposed at the air outlet portion, the baffle has a buckle hole, and the buckle hole does not communicate with any side of the baffle, and the baffle The hook portion of the pivotal member passes through the buckle hole. The anti-backflow fan frame according to claim 1, wherein the frame body is provided with another pivoting member adjacent to the surface of the air outlet portion, and the other pivoting member also has a hook portion, one end of the hook portion Provided on the surface, the other end is a free end and forms an opening with the surface, the baffle has another buckle hole, the other button hole does not communicate with any side of the baffle, and the other pivot The hook portion of the connector member passes through the other buttonhole. The anti-backflow fan frame of claim 2, wherein the openings of the two pivotal members are oriented in the same direction. The anti-backflow fan frame according to claim 2, wherein the openings of the two pivotal members are oriented in different directions. The anti-backflow fan frame according to item 4 of the patent application, wherein the two openings are oriented in opposite directions. The anti-backflow fan frame according to the first, second, third, fourth or fifth aspect of the patent application, wherein the buckle hole is adjacent to one side of the baffle, and a pivot is formed between the buckle hole and the side edge Turn part. The anti-backflow fan frame of claim 6, wherein the pivoting member has an opening width from the free end to the surface that is smaller than a minimum outer diameter of the pivoting portion. The anti-backflow fan frame according to the first, second, third, fourth or fifth aspect of the patent application, wherein the frame body is provided with an assembly hole, the pivoting member has a substrate, and the hook portion is disposed on the substrate, and The substrate is disposed in the assembly hole. According to the anti-backflow fan frame of claim 8, wherein the inner hole edge of the assembly hole is provided with a first latching portion, and the outer peripheral edge of the substrate is provided with a second latching portion, the first latching portion The ridge is a card slot, and the card slot is embedded in the rib. According to the anti-backflow fan frame of claim 8, wherein the inner hole edge of the assembly hole is further provided with a first positioning portion, and the outer peripheral edge of the substrate is further provided with a second positioning portion, and the first positioning portion is a groove, the second positioning portion is a protrusion, and the protrusion is embedded in the groove. The anti-backflow fan frame according to the first, second, third, fourth or fifth aspect of the patent application, wherein the baffle has an opposite windward surface and a leeward surface, the buckle hole penetrating the windward surface and the leeward surface, The windward side faces the inlet portion, and the leeward side is provided with a top portion. The anti-backflow fan frame according to claim 11, wherein the frame body is provided with a stopping portion that abuts against the windward side of the baffle. The anti-backflow fan frame according to the eighth aspect of the invention, wherein the frame body has an upper frame body and a lower frame body, and the assembly hole is disposed on an inner wall surface of the upper frame body and adjacent to the air outlet portion. The anti-backflow fan frame according to claim 13 , wherein the stopping portion is disposed on an inner wall surface of the lower frame body and adjacent to the air outlet portion. The anti-backflow fan frame according to claim 1, 2, 3, 4 or 5, wherein the anti-backflow fan frame is a blast fan frame.