Fan module with detachable dual-fan assembly

1 . A fan module for cooling electronic devices, the fan module comprising:

a first fan, including:

a first housing having a plurality of latching slots;

a first engagement member disposed on the first housing, the first engagement member defining a first engagement slot, the first engagement slot having a first opening oriented toward a corresponding latching slot; and

a first fan blade disposed within the first housing; and

a second fan, including:

a second housing;

a second engagement member disposed on the second housing, the second engagement member being detachably fitted in the first engagement slot of the first engagement member;

a second fan blade disposed within the second housing; and

a latching member disposed in corresponding latching slots and configured to prevent the second engagement member from disengaging from the first engagement member.

2 . The fan module of claim 1 , wherein at least one of the plurality of latching slots includes a guide slope, and the latching member includes two opposing cam surfaces facing each other, the guide slope being configured to interact with a corresponding cam surface to facilitate engagement.

3 . The fan module of claim 1 , wherein the latching member includes a base portion, two side arm portions connected to opposite sides of the base portion, and two hook portions respectively connected to distal ends of the side arm portions, the hook portions each having a cam surface facing a corresponding latching slot.

4 . The fan module of claim 1 , wherein the latching member at least partially overlaps the second engagement member in a circumferential direction of rotation of the second fan blade to prevent the second engagement member from disengaging from the first engagement member.

5 . The fan module of claim 1 , further comprising a stop member, wherein:

the first fan includes a third engagement member disposed on the first housing, the third engagement member defining a second engagement slot having an opening oriented toward the stop member; and

the second fan includes a fourth engagement member disposed on the second housing, the fourth engagement member being detachably fitted in the second engagement slot of the third engagement member.

6 . The fan module of claim 5 , wherein each of the first, second, third, and fourth engagement members includes two spaced-apart members, the first engagement member and the third engagement member are alternately arranged, and the second engagement member and the fourth engagement member are alternately arranged.

7 . The fan module of claim 1 , wherein the first engagement member includes an extension section extending from the first housing toward the second fan, and a bent section extending from the extension section at an angle relative to the extension section, the bent section having a first positioning surface facing the first fan blade, the second engagement member having a second positioning surface facing away from the first fan blade, the first positioning surface and the second positioning surface being in contact with each other and forming an acute angle relative to a rotation axis of the second fan blade.

8 . The fan module of claim 7 , wherein the bent section further includes a third positioning surface adjacent to the first opening, the second engagement member includes a fourth positioning surface facing away from the latching member, and the third positioning surface and the fourth positioning surface being in contact with teach other and extending parallel to the rotation axis of the second fan blade.

9 . The fan module of claim 8 , wherein the extension section and the bent section together define a fifth positioning surface facing the rotation axis of the second fan blade, the second housing includes a sixth positioning surface on an outer side thereof, and the fifth positioning surface and the sixth positioning surface being in contact with each other and extending parallel to a circumferential direction of rotation of the second fan blade.

10 . The fan module of claim 9 , wherein the first housing includes a seventh positioning surface facing the second housing, the second housing includes an eighth positioning surface facing the first housing, and the seventh positioning surface and the eighth positioning surface being in contact with each other and extending perpendicular to the rotation axis of the second fan blade.

11 . A fan module for cooling electronic devices, the fan module comprising:

a first fan including a first housing, a first engagement member projecting from the first housing, and a first fan blade disposed within the first housing;

a second fan including a second housing, a second engagement member projecting from the second housing and detachably coupled to the first engagement member, and a second fan blade disposed within the second housing; and

a stop member disposed on the first housing,

wherein the first housing includes a third engagement member having a second engagement slot with a second opening facing the stop member, and the second housing includes a fourth engagement member detachably fitted in the second engagement slot;

wherein the first housing includes a plurality of latching slots, the second fan includes at least one latching member fitted in corresponding latching slots, at least one of the latching slots having a guide slope, and the latching member including two opposing cam surfaces, the guide slope being configured to interact with a corresponding cam surface to facilitate engagement.

12 . The fan module of claim 11 , wherein the latching member includes a base portion, two side arm portions connected to opposite sides of the base portion, and two hook portions respectively connected to distal ends of the side arm portions, the hook portions each having a cam surface facing a corresponding latching slot.

13 . The fan module of claim 11 , wherein the latching member at least partially covers the second engagement member in a circumferential direction of rotation of the second fan blade to prevent the second engagement member from disengaging from the first engagement member.

14 . The fan module of claim 11 , wherein each of the first, second, third, and fourth engagement members includes two spaced-apart members, the first engagement member and the third engagement member are alternately arranged, and the second engagement member and the fourth engagement member are alternately arranged.

15 . The fan module of claim 11 , wherein the first engagement member includes an extension section extending from the first housing toward the second fan, and a bent section extending from the extension section at an angle relative to the extension section, the bent section having a first positioning surface facing the first fan blade, the second engagement member having a second positioning surface facing away from the first fan blade, the first positioning surface and the second positioning surface being in contact with each other and forming an acute angle relative to a rotation axis of the second fan blade.

16 . The fan module of claim 15 , wherein the bent section further includes a third positioning surface adjacent to the first opening, the second engagement member includes a fourth positioning surface facing away from the latching member, and the third positioning surface and the fourth positioning surface being in contact with each other and extending parallel to the rotation axis of the second fan blade.

17 . The fan module of claim 16 , wherein the extension section and the bent section together define a fifth positioning surface facing the rotation axis of the second fan blade, the second housing includes a sixth positioning surface on an outer side thereof, and the fifth positioning surface and the six positioning surface being in contact with each other and extending parallel to a circumferential direction of rotation of the second fan blade.

18 . The fan module of claim 17 , wherein the first housing includes a seventh positioning surface facing the second housing, the second housing includes an eighth positioning surface facing the first housing, and the seventh positioning surface and the eighth positioning surface being in contact with each other and extending perpendicular to the rotation axis of the second fan blade.