Centrifugal fan with dust removal device and electronic equipment

Abstract

The utility model belongs to the technical field of fans, and particularly relates to a centrifugal fan with a dust removal device and electronic equipment, which comprise a side plate, a top plate and a bottom plate, the top plate and the bottom plate are respectively combined on the upper side and the lower side of the side plate, the side plate, the top plate and the bottom plate form a shell of the centrifugal fan, a fan wheel is accommodated in the shell, and an air outlet is arranged on one side of the shell. A tongue structure is arranged at the position, close to the air outlet, of the bottom plate and provided with a groove used for collecting dust carried in airflow generated when the fan wheel rotates in the preset rotation direction, an opening of the groove is parallel to the side plate, a drainage component is arranged on the portion, corresponding to the upper portion of the groove, of the side plate, and a dust removal device is correspondingly arranged below the drainage component. The dust removal device removes dust in the groove according to airflow generated by opposite rotation of the fan wheel in the preset rotation direction, the dust in the groove can be regularly removed, normal operation of the fan is ensured, the problem that the capacity of a dust storage cavity in a centrifugal fan is limited is solved, the centrifugal fan is further applied to electronic equipment, and the service life of the electronic equipment is prolonged. And the service life of the electronic equipment can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a centrifugal fan with a dust removal device and an electronic device. Background Art

[0002] When a laptop is running, the fan continuously draws in air to dissipate heat. Tiny particles like dust and fibers in the air can enter the fan with the airflow and potentially accumulate on the fan blades and outlet. Therefore, a groove is designed at the edge of the fan to store this accumulated dust during operation. However, due to limited storage capacity, a device is required to regularly remove dust from the groove to ensure proper fan operation. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a centrifugal fan and electronic equipment with a dust removal device, which can regularly remove dust in the groove to ensure the normal operation of the fan, and solve the problem of limited capacity of the dust storage chamber inside the centrifugal fan.

[0004] The technical solution provided by this utility model is as follows:

[0005] The utility model provides a centrifugal fan with a dust removal device, comprising side panels and a top panel and a bottom panel respectively combined with the upper and lower sides of the side panels, the side panels, the top panel and the bottom panel forming a shell of the centrifugal fan, a fan wheel being housed in the shell, an air outlet being provided on one side of the shell, a tongue structure being provided near the air outlet, the tongue structure being provided with a groove for collecting dust carried in an air flow generated by the fan wheel rotating along a predetermined rotation direction, the opening of the groove being parallel to the side panels, a flow guide component being provided above the side panels corresponding to the groove, a dust removal device being correspondingly provided below the flow guide component, the dust removal device removing dust in the groove according to the air flow generated by the fan wheel rotating in the opposite direction along the predetermined rotation direction.

[0006] Furthermore, the dust removal device includes a dust removal channel opened below the drainage component, a dust removal port connected to the dust removal channel and arranged on the side panel, and an electromagnetic breaker. The electromagnetic breaker is arranged in a accommodating cavity provided inside the shell or in a accommodating cavity provided outside the shell. The internal accommodating cavity is opened on the side of the tongue structure close to the side panel and is parallel to the groove.

[0007] Furthermore, the electromagnetic breaker includes an electromagnet, a telescopic shaft and a dust removal valve. A block is provided in the accommodating chamber. A dust removal valve and an electromagnet are respectively provided above and below the block. The dust removal valve and the electromagnet are connected through a telescopic shaft located at the axis of the electromagnet.

[0008] Furthermore, when the electromagnetic breaker is located in the built-in accommodating chamber, the dust removal valve is L-shaped, and when the fan wheel rotates along the predetermined rotation direction, the vertical section of the dust removal valve extends from the through hole opened on the side panel of the accommodating chamber to close the dust removal port.

[0009] Furthermore, when the electromagnetic breaker is located in the accommodating chamber of the external device, the dust removal valve is square, and through holes are opened on the left and right sides of the accommodating chamber. The through holes correspond to the positions of the dust removal ports. When the impeller rotates along the predetermined rotation direction, the dust removal valve extends to the through holes to close the dust removal port.

[0010] Furthermore, the opening size of the groove of the built-in accommodating chamber is smaller than the opening size of the groove of the external accommodating chamber, and the diversion component includes an arcuate edge along the side panel, a horizontal edge flush with the dust removal port, and a vertical edge parallel to the side panel. The connection between the arcuate edge and the right-angled edge forms a rounded structure, the width between the arcuate edge and the right-angled edge gradually increases from top to bottom and the widest part does not exceed the central axis of the groove, the length of the horizontal edge is set according to the distance between the right side edge of the groove and the side panel, and the arcuate edges of the built-in accommodating chamber and the external accommodating chamber are respectively concave or convex.

[0011] Furthermore, it also includes a circuit board for controlling the fan wheel to rotate in a predetermined direction and in the opposite direction of the predetermined direction. The circuit board is arranged below the fan wheel and is electrically connected to the fan wheel and the dust removal device respectively.

[0012] The utility model also provides an electronic device, comprising the centrifugal fan with the dust removal device described above.

[0013] Furthermore, the electronic device is a notebook computer, a desktop computer, an all-in-one computer or a tablet computer.

[0014] Beneficial effects

[0015] The centrifugal fan of this utility model achieves automatic dust removal through its ingenious design. When the impeller rotates in the predetermined direction, dust in the airflow is collected in the grooves of the tongue structure. When the impeller rotates in the opposite direction, the generated airflow removes the dust from the grooves, thus achieving automatic dust removal. By promptly removing dust from the fan interior, this design maintains fan cleanliness and reduces the impact of dust on fan efficiency. Furthermore, by reducing dust accumulation, the fan's heat dissipation performance is improved, further enhancing operational efficiency.

[0016] The utility model adopts a built-in dust removal device designed inside the fan, which efficiently utilizes the internal space of the fan, reduces the occupancy of the system space, and facilitates the distribution of various components of the system; and the external dust removal device is designed outside the fan, which is suitable for situations where the system space is large and there is no space at the tongue mouth inside the fan, and does not affect the original design of the internal cavity of the fan; the specially designed diversion component is to avoid a large performance loss when the fan rotates forward, and can guide the reverse airflow to the dust storage chamber and the dust removal port when the fan is reversed, thereby improving the dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a built-in dust removal device;

[0018] Figure 2 This is a partial enlarged view of the built-in dust removal device;

[0019] Figure 3 It is a structural diagram of an external pull-type dust removal device;

[0020] Figure 4 This is a partial enlarged view of the external pull-type dust removal device;

[0021] Figure 5 This is a schematic diagram of the dust removal working process of the external pull dust removal device;

[0022] Explanation of the accompanying drawings: 1. Shell; 1-1. Top plate; 1-2. Bottom plate; 1-3. Side plate; 2. Fan wheel; 3. Ash storage chamber; 4. Tongue-shaped structure; 5. PCBA; 6. Drainage component; 7. Built-in dust removal device; 7-1. Dust removal channel; 7-2. Dust removal port; 7-3. Accommodating chamber; 7-4. L-shaped dust removal valve; 7-5. Electromagnet; 7-6. Telescopic shaft; 8. Externally pulled dust removal device; 8-1. Dust removal channel; 8-2. Dust removal port; 8-3. Accommodating chamber; 8-4. Square dust removal valve; 8-5. Electromagnet; 8-6. Telescopic shaft. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] Example 1

[0027] like Figure 1-2 As shown, an embodiment of the present invention provides a centrifugal fan with a dust removal device, including side panels 1-3 and a top panel 1-1 and a bottom panel 1-2 respectively combined on the upper and lower sides of the side panels 1-3. The side panels 1-3, the top panel 1-1 and the bottom panel 1-2 constitute a shell 1 of the centrifugal fan, and a fan wheel 2 is accommodated in the shell 1. An air outlet is provided on one side of the shell 1, and a tongue structure 4 is provided near the air outlet. The tongue structure 4 is provided with a groove, namely, an ash storage chamber 3, for collecting dust carried in the air flow generated by the fan wheel 2 rotating along a predetermined rotation direction. The opening of the groove is parallel to the side panel 1-3, and a guide component 6 is provided above the side panel 1-3 corresponding to the groove. A dust removal device is correspondingly provided below the guide component 6. The dust removal device removes dust in the groove according to the air flow generated by the fan wheel 2 rotating in the opposite direction of the predetermined rotation direction. When the centrifugal fan is rotating forward, that is, the fan wheel 2 rotates counterclockwise, it is in the predetermined rotation direction and is in a normal working state.

[0028] In this embodiment, the dust removal device is a built-in dust removal device 7, which includes a dust removal channel 7-1, a dust removal port 7-2 and an electromagnetic breaker. The dust removal channel 7-1 is arranged below the drainage component 6, and the dust removal channel 7-1 is connected to the dust removal port 7-2 arranged on the side panel 1-3. The electromagnetic breaker is arranged in the accommodating cavity 7-3 provided in the shell 1. The accommodating cavity 7-3 is opened on the side of the tongue structure 4 close to the side panel 1-3 and is parallel to the groove.

[0029] In this embodiment, the electromagnetic breaker includes an electromagnet 7-5, a telescopic shaft 7-6 and an L-shaped dust removal valve 7-4. A barrier block is provided in the accommodating chamber 7-3. The L-shaped dust removal valve 7-4 and the electromagnet 7-5 are respectively provided above and below the barrier block. The L-shaped dust removal valve 7-4 and the electromagnet 7-5 are connected by the telescopic shaft 7-6 located at the axis of the electromagnet 7-5. When the impeller 2 rotates along the predetermined rotation direction, the vertical section of the L-shaped dust removal valve 7-4 extends from the through hole opened on the side of the accommodating chamber 7-3 near the side plate 1-3 to close the dust removal port 7-2.

[0030] In this embodiment, the guide component 6 includes an arcuate edge along the side panel 1-3, a horizontal edge flush with the dust removal port 7-2, and a vertical edge parallel to the side panel 1-3. The connection between the arcuate edge and the right-angled edge forms a rounded structure. The width between the arcuate edge and the right-angled edge gradually increases from top to bottom and the widest part does not exceed the central axis of the groove. The length of the horizontal edge is set according to the distance from the right side edge of the groove to the side panel 1-3, and the arcuate edge is concave. The design of this guide component 6 has better performance in forward rotation than the guide component 6 used when using an external pull-type dust removal device. When reversing, it will affect part of the airflow entering the ash storage chamber 3. The ash storage chamber 3 of the built-in dust removal device has a smaller space. This design not only avoids excessive loss of forward performance, but also meets the dust removal requirements.

[0031] In this embodiment, a circuit board PCBA 5 is further included for controlling the impeller 3 to rotate in a predetermined direction and in a reverse direction. The circuit board PCBA 5 is disposed below the impeller 2 and is electrically connected to the impeller 2 and the dust removal device.

[0032] Example 2

[0033] like Figure 3-4 As shown, an embodiment of the utility model provides a centrifugal fan with a dust removal device. The difference between this embodiment and Example 1 is that the dust removal device is an external pull-out dust removal device 8, and the dust removal device includes a dust removal channel 8-1, a dust removal port 8-2 and an electromagnetic breaker. The dust removal channel 8-1 is arranged below the guide component 6, and the dust removal channel 8-1 is connected to the dust removal port 8-2 arranged on the side panel 1-3. The electromagnetic breaker is arranged in the accommodating cavity 8-3 outside the shell 1.

[0034] In this embodiment, the electromagnetic breaker includes an electromagnet 8-5, a telescopic shaft 8-6 and a square dust removal valve 8-4. A partition block is provided in the accommodating chamber 8-3. The square dust removal valve 8-4 and the electromagnet 8-5 are respectively arranged above and below the partition block. The square dust removal valve 8-4 and the electromagnet 8-5 are connected by the telescopic shaft 8-6 located at the axis of the electromagnet 8-5. Through holes are opened on the left and right sides of the accommodating chamber 8-3, and the through holes correspond to the position of the dust removal port 8-2. When the impeller 2 rotates along the predetermined rotation direction, the square dust removal valve 8-4 extends to the through hole to close the dust removal port 8-2.

[0035] In this embodiment, the opening size of the groove is larger than the opening size of the groove in Example 1, and the guide component 6 includes an arcuate edge along the side panel 1-3, a horizontal edge flush with the dust removal port 8-2, and a vertical edge parallel to the side panel 1-3. The connection between the arcuate edge and the right-angled edge forms a rounded structure, and the width between the arcuate edge and the right-angled edge gradually increases from top to bottom and the widest part does not exceed the central axis of the groove. The length of the horizontal edge is set according to the distance between the right side edge of the groove and the side panel 1-3, and the arcuate edge is convex. With this design of the guide component 6, the airflow can enter the ash storage chamber 3 more smoothly during reversal and can bring dust out of the dust removal channel 8-2, but it will have a certain impact on the performance of the forward rotating impeller 2. Since the dust removal port 8-1 is smaller (smaller than Example 1), this structure can reduce the resistance of the airflow out of the dust removal port 8-2 during reverse dust removal, and the space of the ash storage chamber 3 is larger, which can maximize the utilization of the ash storage chamber 3.

[0036] In this embodiment, a circuit board PCBA 5 is further included for controlling the impeller 2 to rotate in a predetermined direction and in a reverse direction. The circuit board PCBA 5 is disposed below the impeller 2 and is electrically connected to the impeller 2 and the dust removal device.

[0037] like Figure 5 As shown, when the centrifugal fan is rotating forward (i.e., impeller 2 is rotating counterclockwise), it is operating normally. At this time, electromagnet 8-5 is de-energized, and telescopic shaft 8-6 is extended, keeping square dust removal valve 8-4 closed. Centrifugal force propels dust particles in the airflow toward the outer edge of the fan, forming a relatively low-speed eddy current in the dust storage chamber 3 shown in the figure. Dust particles move more slowly in this area, making them more likely to accumulate there, leading to a gradual accumulation of dust.

[0038] When the centrifugal fan is in reverse rotation, i.e., when the impeller 2 rotates clockwise, it enters the dust removal mode. At this time, the electromagnet 8-5 is energized, and the telescopic shaft 8-6 retracts, keeping the square dust removal valve 8-4 open. During reverse rotation, the airflow direction changes, and dust particles are subjected to centrifugal forces in different directions. The airflow impacts the dust storage chamber area more strongly, causing dust originally accumulated in the dust storage chamber 3 to be re-entrained into the main airflow and carried away from the dust storage chamber 3 area through the dust removal channel 8-1. This effectively reduces dust accumulation in this area and can even remove existing dust accumulation.

[0039] Example 3

[0040] The utility model also provides an electronic device, comprising the centrifugal fan with the dust removal device described in embodiment 1 or embodiment 2.

[0041] In this embodiment, the electronic device is a notebook computer, a desktop computer, an all-in-one computer or a tablet computer.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A centrifugal fan with a dust removal device, characterized in that: The centrifugal fan comprises a side panel and a top panel and a bottom panel respectively combined with the upper and lower sides of the side panel. The side panel, the top panel and the bottom panel constitute a shell of the centrifugal fan. A fan wheel is placed in the shell. An air outlet is provided on one side of the shell. A tongue structure is provided near the air outlet. The tongue structure is provided with a groove for collecting dust carried in the air flow generated by the fan wheel rotating along a predetermined rotation direction. The opening of the groove is parallel to the side panel. A drainage component is provided above the side panel corresponding to the groove. A dust removal device is provided below the drainage component. The dust removal device removes dust in the groove according to the air flow generated by the fan wheel rotating in the opposite direction of the predetermined rotation direction.

2. The centrifugal fan with a dust removal device according to claim 1, characterized in that: The dust removal device includes a dust removal channel opened below the drainage component, a dust removal port connected to the dust removal channel and arranged on the side panel, and an electromagnetic breaker. The electromagnetic breaker is arranged in a accommodating cavity provided inside the shell or in a accommodating cavity provided outside the shell. The internal accommodating cavity is opened on the side of the tongue structure close to the side panel and is parallel to the groove.

3. The centrifugal fan with a dust removal device according to claim 2, characterized in that: The electromagnetic breaker includes an electromagnet, a telescopic shaft and a dust removal valve. A block is provided in the accommodating cavity. A dust removal valve and an electromagnet are respectively provided above and below the block. The dust removal valve and the electromagnet are connected through a telescopic shaft located at the axis of the electromagnet.

4. The centrifugal fan with a dust removal device according to claim 3, characterized in that: When the electromagnetic breaker is located in the built-in accommodating chamber, the dust removal valve is L-shaped. When the fan wheel rotates along the predetermined rotation direction, the vertical section of the dust removal valve extends from the through hole opened on the side of the accommodating chamber near the side plate to close the dust removal port.

5. The centrifugal fan with a dust removal device according to claim 3, characterized in that: When the electromagnetic breaker is located in the accommodating chamber of the external device, the dust removal valve is square, and through holes are opened on the left and right sides of the accommodating chamber. The through holes correspond to the positions of the dust removal ports. When the impeller rotates along a predetermined rotation direction, the dust removal valve extends to the through holes to close the dust removal port.

6. The centrifugal fan with a dust removal device according to claim 3, characterized in that: The opening size of the groove of the built-in accommodating chamber is smaller than the opening size of the groove of the external accommodating chamber. The diversion component includes an arcuate edge along the side panel, a horizontal edge flush with the dust removal port, and a vertical edge parallel to the side panel. The connection between the arcuate edge and the right-angled edge forms a rounded structure. The width between the arcuate edge and the right-angled edge gradually increases from top to bottom and the widest part does not exceed the central axis of the groove. The length of the horizontal edge is set according to the distance between the right side edge of the groove and the side panel. The arcuate edges of the built-in accommodating chamber and the external accommodating chamber are respectively concave or convex.

7. The centrifugal fan with a dust removal device according to claim 1, characterized in that: It also includes a circuit board for controlling the fan wheel to rotate in a predetermined direction and in a predetermined reverse direction. The circuit board is arranged below the fan wheel and is electrically connected to the fan wheel and the dust removal device respectively.

8. An electronic device, characterized in that: A centrifugal fan with a dust removal device comprising the centrifugal fan according to any one of claims 1 to 7.

9. The electronic device according to claim 8, wherein: The electronic device is a notebook computer, a desktop computer, an all-in-one computer or a tablet computer.

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