Improved structure of direct-current fan

Abstract

The improved structure of the direct-current fan relates to the technical field of direct-current fans and comprises a main box body, the main box body is a square box body with an opening in one side, an air inlet and an air outlet are formed in the center of the front side and the center of the rear side of the main box body respectively, and a side edge mounting plate is detachably fixed to the opening side of the main box body. A fan support is inserted in the center of the main box body, a cross rotating frame is fixedly connected to the center of the fan support, a direct-current motor is fixedly installed on the front side of the cross rotating frame, the main box body is detachably connected with a side edge mounting plate, the side edge mounting plate is detachably connected, and therefore the fan support is convenient to disassemble, assemble and maintain; the switching knob can rotate the tensioning roller, dust removal of the dustproof fiber net is completed, smoothness of the air inlet and the air outlet is kept, the fan support is of an independent fixing structure, the whole device can be detached and maintained during maintenance, and maintenance of the device is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of DC fans, in particular to an improved structure of a DC fan. Background Art

[0002] A DC fan is a fan that converts DC power into mechanical energy by rotating a DC motor through DC input, which in turn drives the fan impeller. The most significant feature of a DC fan is its optional DC motor.

[0003] Most DC fans in the existing technology directly draw air from the external environment to generate wind. In order to prevent dust from accumulating on the fan blades, a dustproof net is required to prevent dust and protect the air inlet of the fan. After a long period of use, the dustproof net at the air inlet accumulates dust or impurities, thereby reducing the air intake efficiency of the air inlet and affecting the normal use of the DC fan. For this reason, we propose an improved structure of the DC fan. Utility Model Content

[0004] The purpose of the present utility model is to solve the problem that most DC fans in the prior art directly draw air from the external environment to generate wind power. In order to prevent dust accumulation on the fan blades, a dust-proof net is needed to prevent and protect the air inlet of the fan. After the DC fan has been used for a long time, dust or impurities are accumulated on the dust-proof net of the air inlet, thereby reducing the air intake efficiency of the air inlet and affecting the normal use of the DC fan. The utility model provides an improved structure of a DC fan.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] An improved structure of a DC fan comprises a main box body, which is a square box body with an opening on one side, and an air inlet and an air outlet are respectively provided in the centers of the front and rear sides of the main box body, a side mounting plate is detachably fixed to the open side of the main box body, and a fan bracket is inserted into the center of the main box body, a cross rotating frame is fixedly connected to the center of the fan bracket, and a DC motor is fixedly installed on the front side of the cross rotating frame, and the output shaft of the DC motor passes through the cross rotating frame backward and is fixedly connected to the fan blades, four tensioning rollers are rotatably installed in the inner cavity of the main box body corresponding to the upper and lower corners of the fan bracket, and a dust-proof fiber net is rotatably sleeved on the four tensioning rollers, and the front and rear of the dust-proof fiber net pass through the front and rear sides of the fan bracket and abut against the inner wall of the main box body front and back, and the tensioning roller shaft on one side passes through the main box body and is fixedly connected to a switching knob.

[0007] Furthermore, a dust removal brush is fixedly connected to the bottom center of the fan bracket, and an dust receiving groove is inserted into the bottom of the inner cavity of the main box body.

[0008] Furthermore, the upper end of the main box body is fixedly connected to a water tank, and a water filling port is provided on one side of the upper end of the water tank. A row of drip holes is provided on the rear side of the bottom of the water tank corresponding to the dustproof fiber net, and a water filling plug is threadedly connected to the water filling port at the upper end of the water tank.

[0009] Furthermore, a square groove is provided on the side of the main box body away from the side mounting plate, and the bottom of the square groove is fixedly connected to a bolt fixing seat corresponding to the inner side of the fan bracket, and one end of the fan bracket corresponding to the square groove passes through the main box body, and the bolt fixing seat is threadedly connected with multiple fixing bolts, and the multiple fixing bolts pass through the bolt fixing seat and then pass through the outer end of the fan bracket.

[0010] Furthermore, a snap-in groove is provided at the center of the outer side of the side mounting plate, and a center boss is fixedly connected to the middle of the snap-in groove, and two pairs of guide rods are symmetrically fixedly connected to the upper and lower sides of the center boss, and the outer ends of the two pairs of guide rods are sleeved and fixed with docking sockets, the outer end of the fan bracket passes through the side mounting plate, and the outer end of the docking socket is fixedly connected to a docking block near the inner side, a docking hole is provided at the outer end of the fan bracket corresponding to the position of the docking block on the outer side of the docking socket, and a compression spring is sleeved on the outer wall of the guide rod.

[0011] Furthermore, a U-shaped slot is provided at the center position of the edge of the main box corresponding to one side of the side mounting plate, and a U-shaped convex edge is fixedly connected to the side mounting plate toward the U-shaped slot.

[0012] Furthermore, a circle of connecting flanges is provided on the front edge of the cross rotating frame, and a protective cover is threadedly connected to the center of the connecting flange of the front end of the cross rotating frame. The protective cover is sleeved on the outside of the DC motor, and a plurality of heat dissipating fins are fixedly connected to the outside of the protective cover at equal intervals.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model is convenient for disassembly and maintenance of the fan bracket by setting the main box body and the side mounting plate, and the detachable connection of the side mounting plate. The cross rotating frame in the fan bracket can be used to install the DC motor and the fan blades in the center of the main box body cavity. The DC motor drives the fan blades to rotate, thereby realizing the conversion of DC power into mechanical energy. The multiple tensioning rollers are set, and the multiple tensioning rollers can tighten and fix the dustproof fiber net. The dustproof fiber net blocks the air inlet and outlet on both sides of the main box body. By setting the switching rotary Button, the switching knob can rotate the tensioning roller to drive the dust-proof fiber mesh to rotate. When the dust-proof fiber mesh on the air inlet side is too dusty, rotating the switching knob can switch the dust-proof fiber mesh with accumulated dust to the front side. During the rotation, the dust accumulated on the dust-proof fiber mesh is cleaned by the dust cleaning brush, and then it is rotated to the air outlet side to blow away the remaining dust by wind force, completing the cleaning of the dust-proof fiber mesh and keeping the air inlet and outlet unobstructed. The independent fixed structure of the fan bracket can be completely disassembled for maintenance, which is convenient for maintenance of the device.

[0015] 2. The utility model is provided with a dust-cleaning brush, which contacts the inner side of the dust-proof fiber net. When the dust-proof fiber net rotates and passes through the dust-cleaning brush, the dust adsorbed and accumulated on the outer side of the dust-proof fiber net can be pushed out from the inner side by the dust-cleaning brush, so as to facilitate the cleaning of the dust accumulated on the outer side of the dust-proof fiber net. The dust collecting groove is provided, and the dust collecting groove can receive the accumulated dust, and the dust collecting groove can be pulled out separately, so as to facilitate the cleaning of the accumulated dust.

[0016] 3. In an environment requiring humidification, the utility model provides a water storage tank, which can be filled with water through the water inlet. The added clean water can drip onto the dust-proof fiber net through the drip hole, and disperse on the dust-proof fiber net on the rear side under the action of gravity, and then evaporated by the blown air flow, which has the effect of cooling and humidifying, making the device more applicable. The provided water filling plug facilitates the opening and closing of the water filling port. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a rear-view perspective diagram of the present invention;

[0019] Figure 3 It is a side sectional view of the utility model;

[0020] Figure 4 It is a front sectional view of the present utility model.

[0021] Figure numerals: 1. Main box; 2. Air inlet; 3. Air outlet; 4. Fan bracket; 5. Side mounting plate; 6. Cross rotating frame; 7. DC motor; 8. Fan blades; 9. Tensioning roller; 10. Dust-proof fiber net; 11. Dust removal brush; 12. Dust collecting trough; 13. Switch knob; 14. Water storage tank; 15. Water filling plug; 16. Bolt fixing seat; 17. Fixing bolt; 18. Center boss; 19. Guide rod; 20. Docking socket; 21. Compression spring; 22. Protective cover; 23. Heat sink fins. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0023] See also Figure 1 - Figure 4 The utility model provides an improved structure of a DC fan, including a main box body 1, which is a square box body with an opening on one side, and an air inlet 2 and an air outlet 3 are respectively opened in the center of the front and rear sides of the main box body 1. A side mounting plate 5 is detachably fixed to one side of the opening of the main box body 1, and a fan bracket 4 is inserted into the center of the main box body 1. A cross rotating frame 6 is fixedly connected to the center of the fan bracket 4, and a DC motor 7 is fixedly installed on the front side of the cross rotating frame 6, and the output shaft of the DC motor 7 passes through the cross rotating frame 6 toward the rear and is fixedly connected to the fan blades 8. Four tensioning rollers 9 are rotatably installed on the inner cavity of the main box body 1 corresponding to the upper and lower corners of the fan bracket 4. A dust-proof fiber net 10 is rotatably sleeved on the four tensioning rollers 9. The front and rear of the dust-proof fiber net 10 pass through the front and rear sides of the fan bracket 4 and are abutted against the inner wall of the main box body 1 front and back, and the rotating shaft of the tensioning roller 9 on one side passes through the main box body 1 and is fixedly connected to a switching knob 13.

[0024] In this embodiment, preferably, a dust collecting brush 11 is fixedly connected to the bottom center of the fan bracket 4, and a dust collecting groove 12 is inserted into the bottom of the inner cavity of the main box body 1; through the provided dust collecting brush 11, the dust collecting brush 11 contacts the inner side of the dust-proof fiber net 10, and when the dust-proof fiber net 10 rotates through the dust collecting brush 11, the dust adsorbed and accumulated on the outside of the dust-proof fiber net 10 can be pushed out from the inside by the dust collecting brush 11, which is convenient for cleaning the dust accumulated on the outside of the dust-proof fiber net 10, and through the provided dust collecting groove 12, the dust collecting groove 12 can receive the accumulated dust, and the dust collecting groove 12 can be pulled out separately, which is convenient for cleaning the accumulated dust.

[0025] In this embodiment, preferably, a water tank 14 is fixedly connected to the upper end of the main box body 1, and a water filling port is provided on one side of the upper end of the water tank 14, and a row of drip holes are provided on the rear side of the bottom of the water tank 14 corresponding to the top of the dust-proof fiber net 10, and a water filling plug 15 is threadedly connected to the water filling port at the upper end of the water tank 14; in an environment requiring humidification, through the set water tank 14, the water tank 14 can be filled with water through the water filling port, and the added clean water can drip onto the dust-proof fiber net 10 through the dripping holes, and dispersed on the dust-proof fiber net 10 on the rear side under the action of gravity, and then evaporated by the blown air flow, which has the effect of cooling and humidifying, making the device more applicable, and the set water filling plug 15 facilitates the opening and closing of the water filling port.

[0026] In this embodiment, preferably, a square groove is opened on the side of the main box body 1 away from the side mounting plate 5, and the bottom of the square groove is fixedly connected to a bolt fixing seat 16 corresponding to the inner side of the fan bracket 4, and the end of the fan bracket 4 corresponding to the square groove passes through the main box body 1, and the internal thread of the bolt fixing seat 16 is connected to a plurality of fixing bolts 17, and the plurality of fixing bolts 17 pass through the bolt fixing seat 16 and then pass through the outer end of the fan bracket 4; through the set bolt fixing seat 16, the fixing bolts 17 on the bolt fixing seat 16 can fix the outer end of the fan bracket 4 after the fan bracket 4 passes through, so as to facilitate the fixation of the side of the fan bracket 4 away from the side mounting plate 5.

[0027] In this embodiment, preferably, a snap-in groove is provided at the center of the outer side of the side mounting plate 5, and a center boss 18 is fixedly connected to the middle of the snap-in groove, and two pairs of guide rods 19 are symmetrically fixedly connected to the upper and lower sides of the center boss 18, and the outer ends of the two pairs of guide rods 19 are sleeved and fixed with docking sockets 20, the outer end of the fan bracket 4 passes through the side mounting plate 5, and the outer end of the docking socket 20 is fixedly connected to a docking block near the inner side, and a docking hole is provided at the outer end of the fan bracket 4 corresponding to the outer docking block position of the docking socket 20, and the outer wall of the guide rod 19 is sleeved with a compression spring 21; by setting The docking socket 20 is arranged, and the docking socket 20 is slidably sleeved on the guide plug rod 19 and is pushed out toward both sides by the restoring elastic force of the compression spring 21. When the side mounting plate 5 is docked with the main box body 1, the fan bracket 4 is fixed to one end of the side mounting plate 5 corresponding to the side mounting plate 5, so as to fix the fan bracket 4 and the side mounting plate 5. At the same time, the docking socket 20 can realize the quick installation and disassembly of the side mounting plate 5 by the rapid pulling, contraction and ejection of the compression spring 21, so that the side mounting plate 5 can be removed for maintenance inside the fan, and the dustproof fiber net 10 can be disassembled and cleaned and the DC motor 7 and the fan blades 8 can be maintained.

[0028] In this embodiment, preferably, a U-shaped slot is provided at the center position of the edge of one side of the main box body 1 corresponding to the side mounting plate 5, and the side mounting plate 5 is fixedly connected with a U-shaped convex edge toward the position of the U-shaped slot; by docking and fixing the set U-shaped slot and the U-shaped convex edge, the firmness and sealing between the side mounting plate 5 and the main box body 1 are improved.

[0029] In this embodiment, preferably, a circle of connecting convex edges is provided on the front edge of the cross rotating frame 6, and a protective cover 22 is threadedly connected to the center of the connecting convex edge at the front end of the cross rotating frame 6. The protective cover 22 is sleeved on the outside of the DC motor 7, and a plurality of heat dissipation fins 23 are fixedly connected to the outside of the protective cover 22 at equal intervals. Through the provision of the protective cover 22, the protective cover 22 can wrap and protect the DC motor 7, prevent water vapor from corroding the DC motor 7, and improve the service life of the DC motor 7. The protective cover 22 and the heat dissipation fins 23 are both made of aluminum alloy, which can assist in the heat dissipation of the DC motor 7 and ensure the normal operation of the DC motor 7.

[0030] The working principle and use process of the present invention are as follows: when the device is used, the main box body 1 and the side mounting plate 5 are provided, and the detachable connection of the side mounting plate 5 is provided, so that the fan bracket 4 can be disassembled and maintained. The cross rotating frame 6 in the fan bracket 4 can be used to install the DC motor 7 and the fan blades 8 in the center of the inner cavity of the main box body 1, and the fan blades 8 are driven to rotate by the DC motor 7, thereby realizing the conversion of DC power into mechanical energy. The multiple tensioning rollers 9 are provided, and the multiple tensioning rollers 9 can tighten and fix the dustproof fiber net 10. The dustproof fiber net 10 blocks the air inlet 2 and the air outlet 3 on both sides of the main box body 1. A switching knob 13 is set, and the switching knob 13 can rotate the tensioning roller 9 to drive the dust-proof fiber mesh 10 to rotate. When the dust-proof fiber mesh 10 on the air inlet 2 side has too much dust, the switching knob 13 is rotated to switch the dust-proof fiber mesh 10 with dust accumulation to the front side. During the rotation, the dust accumulated on the dust-proof fiber mesh 10 is cleaned by the dust cleaning brush 11, and then it is rotated to the side of the air outlet 3, and the residual dust is blown away by wind force, completing the cleaning of the dust-proof fiber mesh 10 and keeping the air inlet 2 and the air outlet 3 unobstructed. The independent fixed structure of the fan bracket 4 can be completely disassembled and maintained during maintenance, which is convenient for maintenance of the device.

[0031] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An improved structure of a DC fan, characterized in that: The invention comprises a main box (1), wherein the main box (1) is a square box with an opening on one side, and an air inlet (2) and an air outlet (3) are respectively provided at the centers of the front and rear sides of the main box (1), a side mounting plate (5) is detachably fixed to the open side of the main box (1), and a fan bracket (4) is inserted into the center of the main box (1), a cross rotating frame (6) is fixedly connected to the center of the fan bracket (4), and a DC motor (7) is fixedly installed on the front side of the cross rotating frame (6), and the output shaft of the DC motor (7) is fixedly connected to the front side of the cross rotating frame (6). A fan blade (8) is fixedly connected to the rear end after passing through the cross rotating frame (6). Four tensioning rollers (9) are rotatably installed at the upper and lower corners of the inner cavity of the main box (1) corresponding to the fan bracket (4). A dustproof fiber net (10) is rotatably sleeved on the four tensioning rollers (9). The front and rear ends of the dustproof fiber net (10) pass through the front and rear sides of the fan bracket (4) and abut against the front and rear inner wall of the main box (1). A switching knob (13) is fixedly connected to the rotation shaft of the tensioning roller (9) on one side after passing through the main box (1).

2. The improved structure of a DC fan according to claim 1, characterized in that: A dust removal brush (11) is fixedly connected to the center of the bottom of the fan bracket (4), and an ash receiving groove (12) is inserted into the bottom of the inner cavity of the main box body (1).

3. The improved structure of a DC fan according to claim 1, characterized in that: The upper end of the main box body (1) is fixedly connected to a water tank (14), and a water injection port is provided on one side of the upper end of the water tank (14). A row of drip holes is provided on the rear side of the bottom of the water tank (14) corresponding to the upper side of the dustproof fiber net (10), and a water injection plug (15) is threadedly connected to the water injection port at the upper end of the water tank (14).

4. The improved structure of a DC fan according to claim 1, characterized in that: A square groove is provided on one side of the main box body (1) away from the side mounting plate (5), and a bolt fixing seat (16) is fixedly connected to the inner side of the fan bracket (4) at the bottom of the square groove, corresponding to one end of the fan bracket (4) corresponding to the square groove, through the main box body (1), and a plurality of fixing bolts (17) are connected to the inner thread of the bolt fixing seat (16), and the plurality of fixing bolts (17) pass through the bolt fixing seat (16) and then pass through the outer end of the fan bracket (4).

5. The improved structure of a DC fan according to claim 1, characterized in that: A snap-fit ​​groove is provided at the center of the outer side of the side mounting plate (5), and a center boss (18) is fixedly connected to the middle of the snap-fit ​​groove. Two pairs of guide rods (19) are symmetrically fixedly connected to the upper and lower sides of the center boss (18). The outer ends of the two pairs of guide rods (19) are sleeved and fixed with docking sockets (20). The outer end of the fan bracket (4) passes through the side mounting plate (5), and the outer end of the docking socket (20) is fixedly connected to a docking plug block near the inner side. A docking hole is provided at the outer end of the fan bracket (4) corresponding to the outer docking plug block position of the docking socket (20), and a compression spring (21) is sleeved on the outer wall of the guide rod (19).

6. The improved structure of a DC fan according to claim 1, characterized in that: A U-shaped slot is provided at the center of the edge of the main box (1) corresponding to one side of the side mounting plate (5), and a U-shaped convex edge is fixedly connected to the side mounting plate (5) toward the U-shaped slot.

7. The improved structure of a DC fan according to claim 1, characterized in that: The front edge of the cross rotating frame (6) is provided with a circle of connecting convex edges, and the center of the front connecting convex edges of the cross rotating frame (6) is threadedly connected to a protective cover (22), the protective cover (22) is sleeved on the outside of the DC motor (7), and a plurality of heat dissipation fins (23) are fixedly connected to the outside of the protective cover (22) at equal intervals.

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