Cooling fan with protection mechanism

Abstract

The utility model discloses a cooling fan with a protection mechanism, which comprises a base, a plurality of cooling fans are fixedly mounted on one side of the upper end face of the base, and a plurality of air outlets are formed in the upper end face of each cooling fan; a fan cooling protection mechanism is arranged in front of the cooling fan and comprises an L-shaped hollow plate, a strip-shaped air inlet hole, an L-shaped groove, an air conveying groove, a plurality of air inlet pipes and a pushing mechanism, the L-shaped groove is located in the L-shaped hollow plate, the strip-shaped air inlet hole is located in the face, facing the air outlet hole, of the L-shaped hollow plate, and the air conveying groove is located in the face, facing the air outlet hole, of the L-shaped hollow plate. The face, facing the air outlet holes, of the L-shaped hollow plate is attached to the upper end face of the cooling fan. The cooling fan has the advantages that the situation that the temperature of the cooling fan is too high due to the influence of the external environment can be avoided through the fan cooling protection mechanism, the cooling fan can keep a proper operation temperature all the time, and therefore the service life of the cooling fan is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling, in particular to a cooling fan with a protection mechanism. Background Art

[0002] Cooling fan is a kind of equipment used for cooling, which is widely used in various industries, agriculture and life fields. Its working principle is mainly to inhale and discharge air to make the air flow, and then exchange the heat of the object with the outside world to achieve the effect of cooling;

[0003] Patent number CN218407834U in the prior art is a cooling fan with an external protective mechanism. By fixing a protective shell on the outer shell of the equipment, the cooling fan can be prevented from being damaged by impact when used in places with poor environments.

[0004] However, although this cooling fan can cool external objects, it cannot cool itself. When this cooling fan is used on equipment that generates a large amount of heat, such as dry-type transformers, the heat generated by the dry-type transformers themselves will directly act on the dry-type transformers, causing the temperature of the cooling fan itself to increase. When the temperature of the cooling fan itself is too high, it will accelerate its aging, reduce its efficiency, and may even cause failure of the equipment itself. Therefore, it does not meet the existing needs. We have proposed a cooling fan with a protective mechanism. Utility Model Content

[0005] The utility model aims to provide a cooling fan with a protective mechanism to solve the problem that the cooling fan mentioned in the above background technology can cool external objects but cannot cool itself. When the cooling fan is used on equipment such as dry-type transformers that generate a large amount of heat, the heat generated by the dry-type transformer itself will directly act on the dry-type transformer, thereby causing the temperature of the cooling fan itself to increase. When the temperature of the cooling fan itself is too high, it will accelerate its aging, reduce its efficiency, and may even cause problems such as failure of the equipment itself.

[0006] To achieve the above object, the utility model provides the following technical solution: a cooling fan with a protective mechanism, comprising a base, a plurality of cooling fans are fixedly mounted on one side of the upper end surface of the base, and a plurality of air outlet holes are provided on the upper end surface of the cooling fan;

[0007] A fan cooling protection mechanism is provided in front of the cooling fan, and the fan cooling protection mechanism includes an L-shaped hollow plate, a strip air inlet hole, an L-shaped groove, a plurality of air inlet pipes of an air delivery groove, and a pushing mechanism. The L-shaped groove is located inside the L-shaped hollow plate, and the strip air inlet hole is located on the surface of the L-shaped hollow plate facing the air outlet hole, and the surface of the L-shaped hollow plate facing the air outlet hole is in contact with the upper end surface of the cooling fan, and the strip air inlet hole and the air delivery groove are communicated through the L-shaped groove;

[0008] The plurality of air inlet pipes are all installed on the lower end surface of the cooling fan, and the cooling fan is connected to the interior of the air delivery trough through the air inlet pipe, and the L-shaped hollow plate can be pushed forward and backward in parallel through the pushing mechanism.

[0009] Preferably, a dry-type transformer is provided on one side of each cooling fan, and the lower end surface of the dry-type transformer is fixed to the cooling fan by bolts.

[0010] Preferably, a temperature sensor is fixedly mounted on both sides of the lower end surface of each cooling fan;

[0011] The pushing mechanism comprises a metal shell, a stepping motor is fixedly mounted on one side inside the metal shell, and the stepping motor is connected to a temperature sensor via an electrical signal.

[0012] Preferably, the output shaft of the stepper motor is connected to a square rod through a coupling, the outer side of the square rod is provided with an internal thread groove located on the outer surface of the metal shell, the interior of the internal thread groove is provided with a threaded rod matching its internal thread, and the surface of the threaded rod facing the stepper motor is provided with a square slot extending into the interior of the threaded rod, and the square rod is inserted into the interior of the square slot.

[0013] Preferably, the inner wall of the square slot has a square cross-sectional shape, the outer surface of the square rod fits with the inner wall of the square slot, and the square rod is slidably connected to the square slot.

[0014] Preferably, the surface of the threaded rod facing the L-shaped hollow plate is connected to a fixed sleeve through a roller bearing, and a movable sleeve is provided on the outer surface of the L-shaped hollow plate. A strip through hole is provided below the movable sleeve, which is located on the outer surface of the metal shell and communicated with the interior of the gas transmission groove. The bottom end of the L-shaped hollow plate enters the interior of the gas transmission groove by passing through the strip through hole. The fixed sleeve on the outer surface of the L-shaped hollow plate located inside the strip through hole is provided with a sealing rectangle, and a sealing rectangular groove is provided on the outside of the sealing rectangle. The upper and lower end faces of the sealing rectangle are both in contact with the inner wall of the sealing rectangular groove, and the width of the inner wall of the sealing rectangular groove is longer than the width of the outer surface of the sealing rectangle.

[0015] Preferably, a metal cover plate located on the outer surface of the metal shell is provided in front of the stepper motor, and the metal shell and the metal cover plate are fixed by screws.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model can transfer a part of the cold air generated by the cooling fan itself to the inside of the cooling fan device through the fan cooling protection mechanism, so as to cool down the cooling fan itself. The above technical solution can prevent the cooling fan itself from being overheated due to the influence of the external environment, thereby increasing the service life of the cooling fan;

[0018] 2. The utility model can arbitrarily disconnect or connect the fan cooling protection mechanism through a stepper motor. When the temperature of the cooling fan itself is low and the fan cooling protection mechanism is not needed to cool it, the fan cooling protection mechanism can be disconnected to ensure that no cold air is wasted. The above technical solution improves the flexibility of the fan cooling protection mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a side view of the bottom structure of the utility model as a whole;

[0021] Figure 3 For this utility model Figure 1 Side view of the internal structure at A in the middle;

[0022] Figure 4 For this utility model Figure 3 A magnified view of the structure at point B.

[0023] In the figure: 1. Cooling fan; 2. Dry-type transformer; 3. Air outlet; 4. L-shaped hollow plate; 5. Strip air inlet; 6. Metal shell; 7. Strip through hole; 8. Sealed rectangular groove; 9. Sealed rectangle; 10. Gas transmission groove; 11. Conducting pipe; 12. Temperature sensor; 13. Moving plate; 14. Threaded rod; 15. Internal thread groove; 16. L-shaped groove; 17. Square slot; 18. Square rod; 19. Stepper motor; 20. Base. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] The cooling fan 1 (model GFDD470), the dry-type transformer 2 (model SG-1-500KVA) and the stepper motor 19 (model 86BTG250) mentioned in the present invention can be purchased from the market or obtained through private customization.

[0026] like Figure 1 and Figure 3 As shown, a cooling fan with a protective mechanism includes a base 20, a plurality of cooling fans 1 are fixedly mounted on one side of the upper end surface of the base 20, and a plurality of air outlet holes 3 are provided on the upper end surface of the cooling fans 1;

[0027] A fan cooling protection mechanism is provided in front of the cooling fan 1, and the fan cooling protection mechanism includes an L-shaped hollow plate 4, a strip air inlet hole 5, an L-shaped groove 16, a gas delivery groove 10, a plurality of air inlet pipes 11 and a pushing mechanism. The L-shaped groove 16 is located inside the L-shaped hollow plate 4, the strip air inlet hole 5 is located on the surface of the L-shaped hollow plate 4 facing the air outlet hole 3, and the surface of the L-shaped hollow plate 4 facing the air outlet hole 3 is in contact with the upper end surface of the cooling fan 1, and the strip air inlet hole 5 and the gas delivery groove 10 are communicated through the L-shaped groove 16;

[0028] A plurality of air inlet pipes 11 are installed on the lower end surface of the cooling fan 1, and the cooling fan 1 is connected with the interior of the air delivery trough 10 through the air inlet pipes 11, and the L-shaped hollow plate 4 can be pushed forward and backward in parallel through the pushing mechanism.

[0029] As the preferred technical solution of this embodiment, Figure 1 and Figure 3 As shown, a dry-type transformer 2 is provided on one side of each cooling fan 1, and the lower end surface of the dry-type transformer 2 is fixed to the cooling fan 1 by bolts; a temperature sensor 12 is fixedly installed on both sides of the lower end surface of each cooling fan 1;

[0030] The pushing mechanism includes a metal shell 6, and a stepping motor 19 is fixedly installed on one side inside the metal shell 6. The stepping motor 19 is connected to the temperature sensor 12 through an electrical signal. When in use, the power supply is connected. When the dry-type transformer 2 needs to be cooled, the cooling fan 1 is started. The cooling fan 1 can spray cold air through the air outlet 3 to cool the dry-type transformer 2. At the same time, the temperature inside the cooling fan 1 can be monitored in real time through the temperature sensor 12. When the cooling fan 1 becomes a high-temperature state due to the dry-type transformer 2 working around it, the stepping motor 19 connected to the temperature sensor 12 by an electrical signal will be automatically started.

[0031] As the preferred technical solution of this embodiment, Figure 4As shown, the output shaft of the stepper motor 19 is connected to a square rod 18 through a coupling, the outer side of the square rod 18 is provided with an internal thread groove 15 located on the outer surface of the metal shell 6, the inner side of the internal thread groove 15 is provided with a threaded rod 14 matching the internal thread thereof, the surface of the threaded rod 14 facing the stepper motor 19 is provided with a square slot 17 extending to the inside of the threaded rod 14, and the square rod 18 is inserted into the inside of the square slot 17; the stepper motor 19 can drive the square rod 18 connected thereto to rotate;

[0032] The inner wall cross-section of the square slot 17 is a square, the outer surface of the square rod 18 fits with the inner wall of the square slot 17, and the square rod 18 and the square slot 17 are slidably connected; since the outer surface of the square rod 18 fits with the inner wall of the square slot 17 located on the outer surface of the threaded rod 14, when the square rod 18 rotates, the threaded rod 14 will rotate synchronously therewith, and the rotating threaded rod 14 can move forward and backward through the internal thread transmission of the internal thread groove 15, and the threaded rod 14 is moved backward at this time;

[0033] As the preferred technical solution of this embodiment, Figure 3 As shown, the surface of the threaded rod 14 facing the L-shaped hollow plate 4 is connected to a fixed sleeve through a roller bearing and is provided with a movable sleeve 13 on the outer surface of the L-shaped hollow plate 4. A strip through hole 7 is provided below the movable sleeve 13, which is located on the outer surface of the metal shell 6 and is communicated with the inside of the gas transmission groove 10. The bottom end of the L-shaped hollow plate 4 enters the inside of the gas transmission groove 10 by passing through the strip through hole 7. A sealing rectangle 9 is provided on the outer surface of the L-shaped hollow plate 4 located inside the strip through hole 7. A sealing rectangular groove 8 is provided on the outer side of the sealing rectangle 9. The upper and lower end surfaces of the sealing rectangle 9 are both fitted with the inner wall of the sealing rectangular groove 8, and the width of the inner wall of the sealing rectangular groove 8 is longer than the width of the outer surface of the sealing rectangle 9. When the threaded rod 14 moves backward, it will drive the L-shaped hollow plate 4 to move together through the movable sleeve 13, and as the L-shaped hollow plate 4 moves , the strip air inlet hole 5 located on the outer surface of the L-shaped hollow plate 4 will move to above the air outlet hole 3 located on the upper end surface of the cooling fan 1, and because the surface of the L-shaped hollow plate 4 facing the upper end surface of the cooling fan 1 is in contact with the upper end surface of the cooling fan 1, when the strip air inlet hole 5 moves to above the air outlet hole 3, the cold air discharged from the air outlet hole 3 will enter the interior of the L-shaped hollow plate 4 through the strip air inlet hole 5, and enter the interior of the air conveying groove 10 along the L-shaped hollow plate 4, and finally enter the interior of the cooling fan 1 through the air inlet pipe 11 that is internally connected to the air conveying groove 10, so as to cool down the cooling fan 1. In this embodiment, the fan cooling protection mechanism can prevent the cooling fan 1 from being overheated due to the influence of the external environment, thereby increasing the service life of the cooling fan 1;

[0034] When the temperature of the cooling fan 1 itself is low and the fan cooling protection mechanism is not needed to cool it, the stepper motor 19 is started again, and the L-shaped hollow plate 4 is moved forward this time, and the strip-shaped air inlet hole 5 located on the outer surface of the L-shaped hollow plate 4 is moved away from the top of the air outlet hole 3, and the fan cooling protection mechanism can be disconnected, so as to ensure that no waste of cold air is caused. The above technical solution improves the flexibility of the fan cooling protection mechanism;

[0035] During the movement of the L-shaped hollow plate 4, the sealing rectangle 9 fixed on the outer surface of the L-shaped hollow plate 4 will move inside the sealing rectangular groove 8 accordingly, and since the width of the inner wall of the sealing rectangular groove 8 is longer than the width of the outer surface of the sealing rectangle 9, the sealing rectangular groove 8 will not hinder the movement of the sealing rectangle 9. When the L-shaped hollow plate 4 is pushed backward, the sealing rectangle 9 will also move inside the sealing rectangular groove 8. The above technical solution can prevent the sealing state of the gas transmission groove 10 from being released due to the movement of the L-shaped hollow plate 4.

[0036] A metal cover plate located on the outer surface of the metal shell 6 is provided in front of the stepper motor 19, and the metal shell 6 and the metal cover plate are fixed by screws; the metal cover plate can protect the stepper motor 19, and when the stepper motor 19 fails, the stepper motor 19 can be repaired by removing the metal cover plate.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A cooling fan with a protective mechanism, comprising a base (20), characterized in that: A plurality of cooling fans (1) are fixedly mounted on one side of the upper end surface of the base (20), and a plurality of air outlet holes (3) are provided on the upper end surface of the cooling fans (1); A fan cooling protection mechanism is provided in front of the cooling fan (1), and the fan cooling protection mechanism comprises an L-shaped hollow plate (4), a strip air inlet hole (5), an L-shaped groove (16), an air delivery groove (10), a plurality of air inlet pipes (11) and a pushing mechanism, wherein the L-shaped groove (16) is located inside the L-shaped hollow plate (4), the strip air inlet hole (5) is located on the surface of the L-shaped hollow plate (4) facing the air outlet hole (3), and the surface of the L-shaped hollow plate (4) facing the air outlet hole (3) is in contact with the upper end surface of the cooling fan (1), and the strip air inlet hole (5) and the air delivery groove (10) are connected via the L-shaped groove (16); The plurality of air inlet pipes (11) are all installed on the lower end surface of the cooling fan (1), and the cooling fan (1) is connected to the interior of the air delivery groove (10) through the air inlet pipes (11). The L-shaped hollow plate (4) can be pushed forward and backward in parallel through the pushing mechanism.

2. A cooling fan with a protection mechanism according to claim 1, characterized in that: A dry-type transformer (2) is provided on one side of each cooling fan (1), and the lower end surface of the dry-type transformer (2) is fixed to the cooling fan (1) by bolts.

3. The cooling fan with a protection mechanism according to claim 1, characterized in that: A temperature sensor (12) is fixedly mounted on both sides of the lower end surface of each cooling fan (1); The pushing mechanism comprises a metal shell (6), a stepping motor (19) is fixedly mounted on one side inside the metal shell (6), and the stepping motor (19) is connected to a temperature sensor (12) via an electrical signal.

4. A cooling fan with a protection mechanism according to claim 3, characterized in that: The output shaft of the stepper motor (19) is connected to a square rod (18) through a coupling, the outer side of the square rod (18) is provided with an internal thread groove (15) located on the outer surface of the metal shell (6), the inner side of the internal thread groove (15) is provided with a threaded rod (14) matching the internal thread thereof, the surface of the threaded rod (14) facing the stepper motor (19) is provided with a square slot (17) extending into the inner side of the threaded rod (14), and the square rod (18) is inserted into the inner side of the square slot (17).

5. A cooling fan with a protection mechanism according to claim 4, characterized in that: The inner wall cross-section of the square slot (17) is in a square shape, the outer surface of the square rod (18) fits the inner wall of the square slot (17), and the square rod (18) is slidably connected to the square slot (17).

6. A cooling fan with a protection mechanism according to claim 4, characterized in that: The surface of the threaded rod (14) facing the L-shaped hollow plate (4) is connected to a fixed sleeve through a roller bearing. The movable sleeve (13) is provided on the outer surface of the L-shaped hollow plate (4). A strip through hole (7) is provided below the movable sleeve (13). The strip through hole (7) is located on the outer surface of the metal shell (6) and is communicated with the inside of the gas transmission groove (10). The bottom end of the L-shaped hollow plate (4) enters the inside of the gas transmission groove (10) through the strip through hole (7). The fixed sleeve on the outer surface of the L-shaped hollow plate (4) located inside the strip through hole (7) is provided with a sealing rectangle (9). The outer side of the sealing rectangle (9) is provided with a sealing rectangular groove (8). The upper and lower end surfaces of the sealing rectangle (9) are both in contact with the inner wall of the sealing rectangular groove (8), and the width of the inner wall of the sealing rectangular groove (8) is longer than the width of the outer surface of the sealing rectangle (9).

7. The cooling fan with a protection mechanism according to claim 4, characterized in that: A metal cover plate located on the outer surface of the metal shell (6) is provided in front of the stepper motor (19), and the metal shell (6) and the metal cover plate are fixed by screws.

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