TWI782793B - Automatic backflow prevention heat dissipating device - Google Patents

Abstract

An automatic backflow prevention heat dissipating device comprises a fan frame which defines at least one air outlet, a fan unit having at least one fan, a backflow prevention unit, and a control unit. The backflow prevention unit has at least one backflow prevention assembly. Each backflow prevention assembly has a rotating set, and an electromagnet. The rotating set has a shield, and a magnet. The shield pivots to a shielding position for shielding the air outlet when the electromagnet is energized. The control unit is used for receiving operation signals emitting from the fans, and energizing the electromagnet corresponding to the fan that corresponds to the operation signal indicating abnormal situation. By arranging the anti-backflow unit and the control unit, the control unit enable the electromagnet to pivot the corresponding shield to the shielding position when the corresponding operation signal indicating abnormal situation, thereby preventing the airflow from flowing back through the corresponding air outlet.

Description

Automatic anti-backflow cooling device

The invention relates to a heat dissipation device, in particular to an automatic backflow prevention heat dissipation device when a fan fails.

Referring to Fig. 1, an existing heat dissipation device 1 includes a frame 11 and six fans 12, 12' arranged on the frame. In addition to the flow of air, the air outlets on both sides of the fan 12' will flow back from the corresponding air outlets of the damaged fan 12' due to the difference in wind pressure. That is to say, assuming that a fan 12 (12') discharges air volume A from the corresponding air outlet, when all the fans 12, 12' are normal, the total air volume is 6A, but when one of the fans 12' is damaged At the same time, due to the phenomenon of air flow backflow, the total exhaust air volume is reduced to about 4A, which is reduced by one-third.

Referring to Fig. 2, in order to improve the aforementioned situation, another existing cooling device 1' is equipped with louvers 13 on the frame 11'. When a fan is damaged, closing the louvers 13 corresponding to the position of the fan can reduce the phenomenon of backflow . However, since the shutter 13 is opening When there is still thickness, it will increase the wind resistance and cause poor heat dissipation.

It is worth mentioning that, in order to improve the backflow phenomenon, another solution is to replace the motor of the fan 12 (12') with a dual-rotor motor, so that when any set of rotors is damaged, the fan 12 can be driven by another set of rotors. (12') rotate to exhaust air. However, the dual-rotor motor is expensive and difficult to popularize.

Therefore, one object of the present invention is to provide an automatic anti-backflow cooling device with enhanced heat dissipation effect.

Therefore, in some embodiments of the present invention, the automatic anti-backflow cooling device includes: a base plate, a fan frame, a fan unit, an anti-backflow unit, and a control unit.

The fan frame is arranged on the base plate and defines at least one air outlet.

The fan unit is arranged on the fan frame and includes at least one fan for blowing air from the corresponding air outlet.

The anti-backflow unit is arranged corresponding to the at least one air outlet, and includes at least one anti-backflow component corresponding to the at least one air outlet. Each anti-backflow unit includes a rotating group pivotally connected to the fan frame, and an electromagnet fixed to the base plate. The rotating group has a baffle plate for covering the corresponding air outlet, and a magnetic part connected to the baffle plate. The electromagnet is used for the magnetic part to lean against, so that the baffle plate is not energized It is positioned at an open position that does not cover the air outlet, and when the electromagnet is energized, it magnetically repels the electromagnet, so that the baffle pivots to a shielding position that covers the air outlet.

The control unit is coupled with the at least one fan and the electromagnets of the anti-backflow components, and is used to receive the operation signal of the at least one fan, and when receiving the operation signal indicates that the corresponding fan has an abnormality, make it The electromagnet of the backflow prevention component corresponding to the corresponding fan is energized, so that the corresponding baffle plate moves to the shielding position, so as to prevent the airflow from backflowing from the corresponding air outlet.

In some implementations, when the baffle of each anti-backflow component is at the open position, the center of gravity of the baffle is located at a first height, and when the baffle is at the shielding position, the center of gravity of the baffle is located at a second height, The first height is smaller than the second height.

In some embodiments, each of the magnetic parts is a permanent magnet, and when the baffle of any anti-backflow component is in the open position, the magnetic parts of the rotating set of the anti-backflow component are magnetically attracted to the electromagnet.

In some embodiments, each of the magnetic components is a permanent magnet, and when the baffle of any backflow prevention component is at the shielding position, the magnetic components of the rotating set of the backflow prevention component are magnetically attracted to the fan frame.

In some embodiments, each baffle has a first end pivotally connected to the fan frame, and a second end opposite to the first end and connected to the corresponding magnetic element.

The present invention at least has the following effects: by setting the anti-backflow unit and The control unit, when receiving the operation signal indicating that there is an abnormality, energizes the electromagnet of the anti-backflow component corresponding to the position of the fan corresponding to the operation signal indicating that there is an abnormality, so that the corresponding baffle moves to the shielding Position, in order to prevent the air flow from the corresponding air outlet backflow. In addition, when the fans are operating normally, the baffles will be positioned at the opening positions of the corresponding air outlets without covering them, without affecting the discharge of the airflow, so as to increase the heat dissipation effect.

1: Cooling device

11: frame

12: fan

13: Shutters

2: Substrate

3: Fan frame

31: wall

32: Air inlet

33: Air outlet

4: Fan unit

41: fan

41A, 41B, 41C: Fan

5: Backflow prevention unit

50: Backflow prevention component

51: Rotation group

511: Baffle

512: Magnetic parts

513: first end

514: second end

52: electromagnet

52A, 52B, 52C: electromagnet

53: Pivot Group

531: Shaft

532: Pivot piece

6: Control unit

h1: first height

h2: second height

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Fig. 1 is a schematic cross-sectional view of an existing heat dissipation device; Fig. 2 is a perspective view of another existing heat dissipation device; Fig. 3 is An incomplete perspective view illustrating an embodiment of the automatic anti-backflow cooling device of the present invention; FIG. 4 is a schematic side view of the embodiment, and a baffle of the embodiment is in an open position; FIG. 5 is a view similar to that of FIG. 4, but with the baffle in a shielded position; and FIG. 6 is a signal block diagram of this embodiment.

Referring to Fig. 3, Fig. 4 and Fig. 5, one embodiment of the automatic anti-backflow cooling device 1 of the present invention includes a base plate 2, a fan frame 3, a fan unit 4, a backflow prevention unit 5, and a control unit 6 ( Refer to Figure 6).

The fan frame 3 is arranged on the base plate 2, and has a surrounding wall 31, and defines at least one air inlet 32 corresponding to the fan unit 4 and used for the airflow to enter, and corresponding to the fan unit 4 and used for the airflow to be discharged and the number At least one air outlet 33 corresponding to the at least one air inlet 32 .

The fan unit 4 is detachably disposed on the fan frame 3 .

It is worth noting that, in an example of this embodiment, the fan unit 4 includes three fans 41, and the fan frame 3 includes three air inlets 32 and three air outlets 33, and each fan 41 It is used to introduce air from the corresponding air inlet 32 and blow out the airflow from the corresponding air outlet 33 . In another aspect of this embodiment, the number of the fan 41, the air inlet 32 and the air outlet 33 of the fan frame 3 can also be one, two or more than four. In addition, the fan frame 3 can include corresponding The number of surrounding walls 31 of the fans 41 , each surrounding wall 31 defines one air inlet 32 and one air outlet 33 .

Referring to FIG. 3 , FIG. 4 and FIG. 5 , the anti-backflow unit 5 is disposed corresponding to at least one of the air outlets 33 . The anti-backflow unit 5 includes at least one anti-backflow assembly 50 corresponding to at least one of the air outlets 33 . Each anti-backflow assembly 50 includes a rotating group 51 pivotally connected to the fan frame 3, an electromagnet 52 fixed on the base plate 2, and at least one for the The pivoting group 51 is pivotally connected to the pivoting group 53 of the fan frame 3 . In this embodiment, the number of the anti-backflow components 50 corresponding to the corresponding air outlets 33 is three, but the user can adjust the number of the anti-backflow components 50 corresponding to the number of the air outlets 33 instead of the three in this embodiment. limit.

The rotating group 51 has a baffle 511 for covering the corresponding air outlet 33 , and a magnetic element 512 connected to the baffle 511 .

When the electromagnet 52 is not energized, the electromagnet 52 abuts against the magnetic member 512 to be positioned at an open position where the air outlet 33 is not covered (see FIG. 4 ). When the electromagnet 52 is energized, the magnetic member 512 and the electromagnet 52 magnetically repel each other, so that the baffle plate 511 pivots to a shielding position that covers the air outlet 33 (see FIG. 5 ), so as to prevent the airflow from corresponding Air outlet 33 backflow. In addition, when the fans 41 are operating normally, the baffles 511 are positioned at the opening positions of the corresponding air outlets 33 without covering them, without affecting the discharge of the airflow, so as to increase the effect of heat dissipation.

Specifically, in this embodiment, the magnetic member 512 is a permanent magnet, and when the baffle plate 511 of any backflow prevention unit 5 is in the shielding position, the magnetic member 512 of the rotating group 51 of the backflow prevention unit 5 has a magnetic force. Adsorbed to the fan frame 3. In this way, when any baffle 511 is in the shielding position, the baffle 511 can not only lean against the corresponding fan frame 3 due to the wind pressure difference, but also be attracted to the fan frame 3 through the magnetic force of the magnetic piece 512 The corresponding position is stabilized at the shielding position, so as to prevent the baffle plate 511 from falling due to accidental contact or the influence of the strength of the airflow or unable to completely cover the air outlet 33 to generate airflow backflow situation. In addition, it is worth noting that, in this embodiment, when the baffle 511 of any backflow prevention unit 5 is at the open position, the magnetic member 512 of the backflow prevention unit 5 is attracted by its own magnetic force. The metal electromagnet 52 attracted by the magnetic member 512 is used to prevent the baffle plate 511 from accidentally lifting up and covering the corresponding air outlet 33 , thereby reducing the exhaust air volume.

It should be noted that, in this embodiment, the anti-backflow assembly 50 has two pivot groups 53 . Wherein, each pivoting group 53 is a hinge, and includes a rotating shaft 531 defining a center of rotation, and two pivoting pieces respectively connected to the corresponding baffle plate 511 and the fan frame 3 and allowing the rotating shaft 531 to pass through. 532, wherein the pivoting group 53 connects the position of the fan frame 3 close to the air outlet 33 and the base plate 2, but it is not limited to this embodiment, as long as the pivoting group 53 can allow the rotating group 51 to The fan frame 3 rotates and pivots between the open position or the shielding position, which can achieve the effect of this embodiment. In addition, the number of the pivot groups 53 is not limited by this embodiment.

Referring to Fig. 4, Fig. 5 and Fig. 6, the control unit 6 is coupled with the electromagnets 52 of the fans 41 and the anti-backflow components 50, and is used to receive the operation signals of the fans 41 and receive the operation signals When the signal indicates that the corresponding fan 41 has an abnormality, the electromagnet 52 of the anti-backflow component 50 corresponding to the corresponding fan 41 is activated, for example, the electromagnet 52 is powered to activate the electromagnet 52 or switch control The switch (not shown) of the electromagnet 52 activates the operation of the electromagnet 52, so that the corresponding baffle plate 511 rotates to the shielding position, so as to prevent the airflow from flowing back from the corresponding air outlet 33.

For the convenience of description, the following description takes the automatic anti-reflux cooling device 1 as an example with three fans 41 in this embodiment. In FIG. 41C, and the electromagnets 52 corresponding to the anti-backflow components 50 of the fans 41A, 41B, and 41C are respectively numbered as electromagnet 52A, electromagnet 52B, and electromagnet 52C.

For example, when the operation signal of the fan 41A indicates that there is an abnormality in the fan 41A, for example, the speed of the fan 41A is zero due to damage to the rotor or other factors such as a circuit failure of the fan or an abnormal chip, or the control Unit 6 does not receive the operation signal of the fan 41A, or the actual speed does not match the preset speed required/indicated when the control unit 6 commands/controls the operation of the fan 41A, the control unit 6 will make the corresponding fan 41A The electromagnet 52A is activated, so that the electromagnet 52A generates a repulsive force to the corresponding magnetic member 512, so the electromagnet 52A pushes the corresponding baffle plate 511 with the repulsive force, so that the corresponding baffle plate 511 pivots to the The shielding position is used to shield the corresponding air outlet 33 so as to prevent the air flow from flowing back through the air outlet 33 . It is also worth noting that in this embodiment, before the damaged or faulty fan 41A is repaired or replaced with a normal fan 41, the magnetic member 512 will be attracted to the corresponding position of the fan frame 3 by its own magnetic force, And/or the control unit 6 will continue to energize the electromagnet 52A to prevent the corresponding baffle plate 511 from rotating due to the influence of the airflow, causing the corresponding air outlet 33 to not be completely covered, and causing at least part of the airflow to flow back.

It should be noted that, in the present invention, when any fan 41 operates abnormally, That is to say, when the control unit 6 receives the operation signal corresponding to any fan 41 and indicates that the fan 41 is abnormally operating, it makes the electromagnet 52 corresponding to any fan 41 start, and the fans 41 When all are in normal operation, that is to say, when the operation signal corresponding to these fans 41 received by the control unit 6 indicates that the fans 41 are all in normal operation, the control unit 6 makes the switch for controlling power supply to the electromagnets 52 In the state of not supplying power to the electromagnets 52, or the control unit controls the electromagnets 52 not to start, thereby preventing the electromagnets 52 from generating repulsive force to achieve the effect of saving power.

Specifically, in this embodiment, each of the baffles 511 has a first end 513 pivotally connected to the fan frame 3 , and a second end 514 opposite to the first end 513 . Thereby, because the distance between the magnetic member 512 and the center of rotation (the arm of force of the magnetic force) is greater than the distance between the center of gravity of the baffle plate 511 and the center of rotation (the arm of force of the force of gravity), therefore, according to the principle of leverage, the control unit 6 only needs to push the electromagnetic The iron 52 generates a small magnetic repulsion force through a small electric power, that is, the baffle 511 is rotated to pivot the baffle 511 to contact the fan frame 3, so that the magnetic force of the magnetic member 512 is attracted to the fan frame 3. The corresponding position of the fan frame 3 achieves the effect of saving power.

In addition, in this embodiment, when the baffle 511 of each anti-backflow unit 5 is at the open position, the center of gravity of the baffle 511 is at a first height h1, and when the baffle 511 is at the shielding position, the center of gravity of the baffle 511 Located at a second height h2, the first height h1 is smaller than the second height h2. In this way, when the maintenance personnel repair or replace the fan 41 with abnormal operation corresponding to the operation signal indicating that there is an abnormality, and the fan 41 after the repair or replacement When the operation signal output by the fan 41 indicates that the repaired or replaced fan 41 is operating normally, the baffle plate 511 that was originally located in the shielding position will be affected by the normal operation of the repaired or replaced fan 41 to generate air flow through the air outlet. 33 blowing, and the thrust will resist the magnetic force of the magnetic member 512 to attract the fan frame 3, so that the baffle 511 does not attract the fan frame 3, thereby making the baffle 511 and the substrate 2 The included angle between them is less than 90 degrees, plus the moment generated by the gravity of the baffle 511 itself, the baffle 511 can rotate toward the open position, and can be reset to the open position without additional mechanisms, so as to simplify the structural design and save The effect of construction costs.

To sum up, the automatic anti-backflow cooling device of the present invention, by setting the anti-backflow unit 5 and the control unit 6, when receiving any of the operation signals indicating that the corresponding fan 41 has an abnormality, The electromagnet 52 of the anti-backflow component 50 corresponding to the corresponding fan 41 is activated, so that the corresponding baffle plate 511 is moved to the shielding position, so as to prevent the airflow from backflowing from the corresponding air outlet 33 . In addition, when the fans 41 are operating normally, the baffles 511 will be positioned at the opening positions of the corresponding air outlets 33 without covering, and will not affect the airflow introduced by the corresponding fans 41 to be discharged through the corresponding air outlets 33 , so the purpose of the present invention can really be achieved.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

2: Substrate

3: Fan frame

31: wall

32: Air inlet

33: Air outlet

5: Backflow prevention unit

50: Backflow prevention component

51: Rotation group

511: Baffle

512: Magnetic parts

52: electromagnet

53: Pivot Group

Claims (5)

An automatic anti-backflow heat dissipation device, comprising: a base plate; a fan frame, arranged on the base plate, and defines at least one air outlet; a fan unit, arranged on the fan frame, and includes at least one air outlet for self-corresponding A fan that blows out the air flow; a backflow prevention unit is set corresponding to the at least one air outlet, and includes at least one number of anti-backflow components corresponding to the at least one air outlet, and each anti-backflow component includes a rotary fan pivotally connected to the fan frame group, and an electromagnet fixed on the base plate, the rotating group has a baffle plate for covering the corresponding air outlet, and a magnetic piece connected to the baffle plate, the electromagnet is used for the magnetic piece to abut against so that the baffle is positioned at an open position that does not cover the air outlet when the electromagnet is not energized, and when the electromagnet is energized, the magnetic member and the electromagnet magnetically repel each other, so that the baffle pivots to a shielding position that shields the air outlet; and a control unit, coupled with the at least one fan and the electromagnet of the backflow prevention component, and used to receive the operation signal of the at least one fan, and upon receiving the aforesaid operation signal When it indicates that the corresponding fan is abnormal, the electromagnet of the anti-backflow component corresponding to the corresponding fan is energized, so that the corresponding baffle plate moves to the shielding position, so as to prevent the air flow from returning from the corresponding air outlet. The automatic anti-backflow cooling device as described in claim 1, wherein when the baffle of each anti-backflow component is in the open position, the center of gravity of the baffle is located at a A first height. When in the shielding position, the center of gravity of the baffle is located at a second height, and the first height is smaller than the second height. The automatic anti-backflow heat dissipation device as described in claim 1, wherein each of the magnetic parts is a permanent magnet, and when the baffle plate of any anti-backflow component is in the shielding position, the magnetic force of the magnetic part of the rotating group of the anti-backflow component Attached to the fan frame. The automatic anti-backflow heat dissipation device as described in claim 1, wherein each of the magnetic parts is a permanent magnet, and when the baffle of any anti-backflow component is in the open position, the magnetic force of the magnetic part of the rotating group of the anti-backflow component Attached to the electromagnet. The automatic anti-backflow cooling device according to claim 1, wherein each of the baffles has a first end pivotally connected to the fan frame, and a first end opposite to the first end and connected to the corresponding magnetic member the second end of .

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