Dust removal fan

Abstract

The present invention discloses a dust removal fan, comprising an outer shell and fan blades, wherein the fan blades are rotatably installed in the outer shell, a plurality of blades inclined in the same direction are formed on the outer circumferential wall of the fan blades, a dust removal hole is formed on the side wall of the outer shell, the dust removal hole can connect the inside and outside of the outer shell, a wind shield is also provided on the side wall of the outer shell, and the wind shield can open or close the dust removal hole. The present invention has a simple structure, and during normal operation, the wind shield closes the dust removal hole, and air does not flow out of the dust removal hole, thereby ensuring the effective air volume of the fan, so that the air volume of the fan under normal working conditions is not reduced due to the increase of the dust removal function, and during dust removal, the wind shield automatically opens to realize automatic dust removal, thereby avoiding the increase in weight caused by the accumulation of dust on the fan blades, which is beneficial to reducing power consumption, ensuring air volume, and improving the heat dissipation effect of the system and the service life of the fan.

Description

Technical Field

[0001] The invention relates to a fan, in particular to a dust removal fan. Background Art

[0002] Generally, the blower fan has a fixed direction, such as Figure 1 This is a counterclockwise fan. If this fan keeps running in one direction for a long time, it is easy to cause dust accumulation. The accumulated dust will increase the weight of the fan blades, increase power consumption, reduce air volume, and affect the life of the fan and the heat dissipation of the system. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a dust removal fan. When the dust removal fan rotates in the reverse direction, the dust will be stirred and discharged from the dust removal holes, thereby achieving the effect of automatic dust removal by the fan.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a dust removal fan, including a shell and fan blades, the fan blades are rotatably installed in the shell, a plurality of blades inclined in the same direction are formed on the outer circumferential wall of the fan blades, a dust removal hole is formed on the side wall of the shell, the dust removal hole can connect the inside and outside of the shell, and a wind shield is also provided on the side wall of the shell, and the wind shield can open or close the dust removal hole.

[0005] As a further improvement of the present invention, the wind shield is hinged on the side wall of the dust removal hole, and the wind shield can be rotated around its hinge axis toward the inside of the shell to a set angle.

[0006] As a further improvement of the present invention, a limit stop wall is formed on the side wall of the inner side of the shell located on the side of the dust removal hole, and the limit stop wall can stop the side wall surface of the wind shield facing the inner side of the shell.

[0007] As a further improvement of the present invention, an inclined surface is formed on the limit stop wall, and the inclined surface can be flush with the side wall of the windshield.

[0008] As a further improvement of the present invention, a protrusion is formed on a side wall of the wind shield facing the inside of the shell and protrudes from the side wall of the shell by a set distance.

[0009] As a further improvement of the present invention, the side wall of the wind deflector facing the inside of the shell is a slope that has an angle with the side wall facing the outside of the shell, the end of the slope close to the hinge axis can be aligned and connected with the inner wall of the shell, and there is a set distance between the end of the slope away from the hinge axis and the inner wall of the shell.

[0010] As a further improvement of the present invention, the end of the wind shield away from the hinge shaft contacts the side wall of the dust removal hole on the side wall of the shell through an inclined surface.

[0011] As a further improvement of the present invention, a baffle driving device and a control module are also provided. The driving device can drive the wind baffle to move to close the dust removal hole or detach from the dust removal hole, and the control module controls the operation of the driving device and the direction of the fan main shaft.

[0012] As a further improvement of the present invention, the driving device is a servo motor, and the servo motor drives the windshield to rotate.

[0013] As a further improvement of the present invention, a dust sensing device is further provided in the fan housing, and the dust sensing device transmits a signal to the control module.

[0014] The beneficial effects of the present invention are as follows: a dust removal hole is opened on the side wall of the fan shell, and a wind shield is hingedly arranged on the side wall of the dust removal hole. When the fan is turned and operated normally, the wind shield closes the dust removal hole under the push of compressed air, so that the air volume of the fan under normal working conditions is not reduced due to the increase of the dust removal function. During dust removal, the fan is reversed, and the raised part of the wind shield rotates the wind shield to a certain angle toward the inside of the shell under the blowing of compressed air to open the dust removal hole. The dust stirred by the reverse operation is discharged from the dust removal hole to the fan by the compressed air of the reverse operation, thereby realizing automatic cleaning of the fan. The present invention has a simple structure. During normal operation, the wind shield closes the dust removal hole, and air does not flow out of the dust removal hole, thereby ensuring the effective air volume of the fan, so that the air volume of the fan under normal working conditions is not reduced due to the increase of the dust removal function. During dust removal, the wind shield automatically opens to realize automatic dust removal, thereby avoiding the increase of weight due to the accumulation of dust on the fan blades, which is beneficial to reducing power consumption, ensuring air volume, and improving the heat dissipation effect of the system and the service life of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural principle diagram of the prior art;

[0016] Figure 2 This is a schematic diagram of the airflow direction when the fan is operating normally;

[0017] Figure 3 A three-dimensional diagram of the dust removal hole of the present invention in an open state;

[0018] Figure 4 This is a front view of the dust removal hole of the present invention when it is opened;

[0019] Figure 5 A three-dimensional diagram of the dust removal hole of the present invention in a closed state;

[0020] Figure 6 This is a front view of the dust removal hole of the present invention in a closed state;

[0021] Figure 7 It is a schematic diagram of the airflow direction during dust removal of the present invention. DETAILED DESCRIPTION

[0022] Embodiment: A dust removal fan comprises a shell 1 and a fan blade 2, wherein the fan blade 2 is rotatably installed in the shell 1, and a plurality of blades 3 inclined in the same direction are formed on the circumferential outer wall of the fan blade 2. A dust removal hole 4 is formed on the side wall of the shell 1, and the dust removal hole 4 can connect the inside and outside of the shell 1. A wind shield 5 is also provided on the side wall of the shell 1, and the wind shield 5 can open or close the dust removal hole 4.

[0023] When the fan is operating normally, the wind shield 5 closes the dust removal hole 4, so that the air volume of the fan under normal working conditions is not reduced due to the increase of the dust removal function; when removing dust, the wind shield 5 is separated from the dust removal hole 4 to open the dust removal hole 4, and the dust stirred by the reverse operation of the fan is discharged from the dust removal hole 4 under the blowing of the reverse running compressed air, thereby realizing automatic cleaning of the fan, avoiding dust accumulation in the fan, and helping the fan to maintain a stable air output and improve its heat dissipation effect.

[0024] The wind shield 5 is hinged on the side wall of the dust removal hole 4, and the wind shield 5 can rotate around its hinge axis to a set angle toward the inside of the housing 1. The dust removal hole 4 is opened or closed by rotating the wind shield 5 around the hinge axis 6. When the wind shield 5 rotates a certain angle toward the inside of the fan, the dust removal hole 4 is opened, and a blocking and guiding structure is formed by the wind shield 5, which can block the dust from circulating in the fan housing 1 and guide the dust to the dust removal hole 4, and then the dust is discharged to the outside of the fan housing 1 through the dust removal hole 4.

[0025] A limit stop wall 7 is formed on the side wall of the inner side of the shell at one side of the dust removal hole 4, and the limit stop wall can stop the side wall surface of the wind shield 5 facing the inner side of the shell. The limit stop wall 7 limits the rotation angle of the wind shield 5 toward the inside of the fan, ensuring that when the wind shield 5 rotates to the extreme position toward the inside of the fan, there is a certain gap B between the blade 3 of the fan blade 2 to avoid interfering with the rotation of the fan blade 2. At the same time, it maintains a certain opening angle, which can just fully block the flow of dust in the shell 1 and guide the dust to the dust removal hole 4.

[0026] The limit stop wall 7 is formed with an inclined surface, which can be flat against the side wall of the wind shield 5. The inclined surface is in flat contact with the wind shield 5 to avoid the two from getting stuck when the wind shield 5 is opened. It is best to form a semicircular surface at the hinged end of the wind shield 5, and form an arc surface covering the root of the wind shield 5 at the root of the limit stop wall 7. The wind shield 5 gradually contacts and flattens against the inclined surface of the limit stop wall 7 during the rotation process, so as to avoid collision between the wind shield 5 and the limit stop wall 7 when the wind shield 5 is opened, and avoid noise.

[0027] The windshield plate 5 has a protrusion protruding from the side wall of the shell by a set distance on one side wall facing the inner side of the shell. When the fan is reversed, the protrusion of the windshield plate 5 is blown by the compressed air to make the windshield plate 5 rotate to a certain angle inward of the shell 1 to open the dust removal hole 4, thereby achieving the effect of automatically opening the dust removal hole 4 when the fan is reversed.

[0028] The side wall of the windshield 5 facing the inside of the shell is an inclined surface with an angle with the side wall facing the outside of the shell. The end of the inclined surface close to the hinge axis can be aligned and connected with the inner wall of the shell, and there is a set distance A between the end of the inclined surface away from the hinge axis and the inner wall of the shell. The inclined surface of the windshield 5 is set to increase the thickness of the end of the windshield 5. The thickness of the end of the windshield 5 facing the hinge axis is consistent with the thickness of the side wall of the shell 1. When the windshield 5 is closed, this end is aligned and connected with the inside of the shell 1, and the other end of the windshield 5 protrudes from the inner wall of the shell 1 by a certain distance, forming a protruding structure. When the fan is running normally, this structure will not block the fan airflow, ensuring normal airflow. When the fan is removing dust, the reverse airflow can quickly open the windshield 5.

[0029] The end of the windshield 5 away from the hinge axis contacts the side wall of the dust removal hole 4 on the side wall of the housing 1 through an inclined surface. The windshield 5 contacts the side wall of the dust removal hole 4 through an inclined surface, which is conducive to ensuring that the windshield 5 fully closes the dust removal hole 4, and the two will not be stuck. The end of the windshield 5 forms an inclined surface, and the end of the windshield 5 forms a sharp angle structure 8 toward the inside of the fan housing 1. When removing dust, the high-pressure airflow enters the gap between the sharp angle structure and the side wall of the housing 1 to form a strong thrust, and the windshield 5 is quickly opened.

[0030] A baffle driving device and a control module are also provided. The driving device can drive the windshield 5 to move and close the dust removal hole 4 or to be separated from the dust removal hole 4. The control module controls the operation of the driving device and the direction of the fan main shaft. After the control module is set according to the pre-set conditions, such as the fan running time, the fan main shaft speed, the dust situation in the fan housing 1, etc., the control module controls the baffle driving device to operate when the fan meets the set conditions, opens the windshield 5, and realizes the fan reverse dust removal. After the fan reverses for the set time, the dust removal is completed, and the control module controls the baffle driving device to reverse to close the windshield 5, and notifies the fan main shaft to rotate normally for heat dissipation.

[0031] The driving device is a servo motor, which drives the windshield plate 5 to rotate. When the windshield plate 5 is rotatably mounted on the housing 1, the servo motor drives the windshield plate to rotate, thereby realizing the opening and closing of the dust removal hole 4. Of course, other driving modes are also possible, such as the windshield plate 5 sliding forward and backward, longitudinal lifting, etc., which can realize the closing and opening of the dust removal hole 4. This is an equivalent replacement structure that can be easily thought of by those skilled in the art based on this patent.

[0032] A dust sensor is also provided in the fan housing 1, and the dust sensor transmits a signal to the control module. The dust sensor senses the dust accumulation in the housing 1, and then controls the baffle driving device to operate to realize automatic dust removal of the fan. At the same time, the windshield 5 is controlled to close and stop dust removal according to the dust removal situation in the housing 1. This structure realizes intelligent dust removal and avoids energy waste. The dust sensor can be a sensor, an imaging device, etc.

Claims

1. A dust removal fan, comprising a housing (1) and a fan blade (2), wherein the fan blade is rotatably mounted in the housing, and a plurality of blades (3) inclined in the same direction are formed on the outer circumferential wall of the fan blade, characterized in that: A dust removal hole (4) is formed on the side wall of the shell, and the dust removal hole can connect the inside and outside of the shell. A windshield (5) is also provided on the side wall of the shell, and the windshield can open or close the dust removal hole. The windshield is hinged on the side wall of the dust removal hole, and the windshield can rotate around its hinge axis toward the inside of the shell at a set angle. A protrusion protruding from the side wall of the shell by a set distance is formed on the side wall of the windshield facing the inside of the shell. The side wall of the windshield facing the inside of the shell is an inclined surface with an angle with the side wall facing the outside of the shell. The end of the inclined surface close to the hinge axis can be aligned and connected with the inner wall of the shell, and the end of the inclined surface away from the hinge axis has a set distance (A) from the inner wall of the shell.

2. The dust removal fan according to claim 1, characterized in that: A limit stop wall (7) is formed on the side wall of the inner side of the shell and located on one side of the dust removal hole. The limit stop wall can stop the side wall surface of the wind shield facing the inner side of the shell.

3. The dust removal fan according to claim 2, characterized in that: The limit stop wall is formed with an inclined surface, and the inclined surface can just be flush with the side wall of the windshield plate.

4. The dust removal fan according to claim 1, characterized in that: The end of the wind shield away from the hinge shaft contacts the side wall of the dust removal hole on the side wall of the shell through an inclined surface.

5. The dust removal fan according to claim 1, characterized in that: A baffle driving device and a control module are also provided. The driving device can drive the wind baffle to move to close the dust removal hole or to be separated from the dust removal hole. The control module controls the operation of the driving device and the direction of rotation of the fan main shaft.

6. The dust removal fan according to claim 5, characterized in that: The driving device is a servo motor, and the servo motor drives the windshield plate to rotate.

7. The dust removal fan according to claim 5, characterized in that: A dust sensing device is also arranged in the fan housing, and the dust sensing device transmits a signal to the control module.

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