Electromagnetic shielding fan structure

Abstract

The invention discloses an electromagnetic shielding fan structure, which comprises a shell, a rotor and a stator, and is characterized by further comprising a circuit board assembly, the circuit board assembly is welded on the stator through a binding post, and a circuit board shielding cover is arranged between the circuit board assembly and the stator; insulation paper is arranged between the circuit board shielding cover and the circuit board assembly. The circuit board shielding cover and the shell form an independent cavity through fasteners such as screws and the like in a clearance fit mode, the circuit board assembly is installed in the cavity, a certain shielding effect on electromagnetic radiation of the fan and external electromagnetic interference is achieved, and therefore the electromagnetic compatibility of the fan is improved. The scheme is simple in structure and low in cost, and the electromagnetic compatibility of the fan can be greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fans and relates to an electromagnetic shielding fan structure. Background Art

[0002] The application scenarios of fans vary due to the different installation environments of their installation equipment. There are many applications in some use scenarios with high requirements for electromagnetic compatibility performance, which puts strict requirements on the electromagnetic shielding capabilities of fans. Some special occasions have high requirements for electromagnetic shielding. In existing products, the main source of electromagnetic interference for fans is the circuit board assembly. The circuit board assembly of the traditional fan structure is in a semi-open state, so its electromagnetic compatibility performance is poor and can no longer meet the corresponding requirements.

[0003] In view of this, the present invention proposes an electromagnetic shielding fan structure, which has the characteristics of easy assembly, electromagnetic shielding, and reliable grounding, and has a good application prospect. Summary of the invention

[0004] The purpose of the present invention is to provide an electromagnetic shielding fan structure, which can shield the electromagnetic interference of the fan circuit board assembly and improve the electromagnetic compatibility performance of the fan to solve the problems in the prior art.

[0005] The present invention is implemented through the following technical scheme: an electromagnetic shielding fan structure, including a shell, a rotor and a stator, characterized in that: it also includes a circuit board assembly, the circuit board assembly is welded to the stator through a terminal, a circuit board shielding cover is arranged between the circuit board assembly and the stator; insulating paper is arranged between the circuit board shielding cover and the circuit board assembly.

[0006] Further: it also includes a support column; the support column is fixed to the circuit board shielding cover through a slotted pan head screw, and the circuit board assembly cooperates with the support column through a slotted countersunk screw.

[0007] Furthermore: the circuit board shielding cover, the shell, and the insulating paper enclose a space for accommodating the circuit board assembly and realizing the shielding function.

[0008] Furthermore: it also includes studs; the studs, slotted countersunk screws, support columns, and slotted pan head screws connect the grounding points on the circuit board assembly with the housing through tight fit while ensuring electrical connection to achieve reliable grounding.

[0009] Furthermore: the stator is connected to the circuit board assembly by tin-lead welding.

[0010] The advantages of the present invention are: the circuit board shielding cover forms an independent chamber with the shell by means of clearance fit through fasteners such as screws, and the circuit board assembly is installed in the chamber, which has a certain shielding effect on the electromagnetic radiation of the fan itself and the external electromagnetic interference, thereby improving the electromagnetic compatibility performance of the fan. At the same time, the environmental adaptability of the fan can be purposefully improved by adding a heat dissipation glue encapsulation method. In addition, the grounding point in the circuit board assembly is connected to the shell by fasteners such as screws, so that the fan is reliably grounded without the need for a separate wire connection. This structure is simple, low-cost, and can greatly improve the electromagnetic compatibility performance of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of the electromagnetic shielding fan structure of the present invention; Figure 2 It is a schematic cross-sectional view of part of the structure of the present invention.

[0012] The serial numbers in the figure are explained as follows: 1 is the circuit board shielding cover, 2 is the stud, 3 is the slotted countersunk screw, 4 is the circuit board assembly, 5 is the shell, 6 is the insulating paper, 7 is the rotor, 8 is the support column, 9 is the slotted pan head screw, and 10 is the stator. DETAILED DESCRIPTION

[0013] Reference Figure 1-2 The present invention provides an electromagnetic shielding fan structure, including a housing 5, a rotor 7 and a stator 10, and also includes a circuit board assembly 4, a terminal is arranged on the stator, the circuit board assembly 4 is welded on the terminal and then equivalent to being welded on the stator 10, a circuit board shielding cover 1 is arranged between the circuit board assembly 4 and the stator 10; an insulating paper 6 is sandwiched between the circuit board shielding cover 1 and the circuit board assembly 4 or is pasted on the inside of the circuit board shielding cover to prevent contact between the circuit board and the shielding cover. The circuit board shielding cover is in contact or clearance fit with the inside of the housing.

[0014] Preferably: it also includes a support column 8; one end of the support column 8 is fixed to the circuit board shielding cover by a slotted pan head screw 9, and the other end is connected to the circuit board assembly 4 by a slotted countersunk screw 3, which plays a role in enhancing strength and preventing collapse.

[0015] Preferably, the circuit board shielding cover 1 , the housing 5 , and the insulating paper 6 enclose a space for accommodating the circuit board assembly 4 and realizing a shielding function.

[0016] Preferably: it also includes a stud 2; the stud 2, the slotted countersunk screw 3, the support column 8, and the slotted pan head screw 9 connect the grounding point on the circuit board assembly 4 with the housing 5 through a tight fit while ensuring electrical connection to achieve reliable grounding.

[0017] Preferably, the terminal posts of the stator 10 are connected to the circuit board assembly 4 by tin-lead welding.

[0018] The present invention is further described below by way of examples.

[0019] Embodiment: The present invention provides an electromagnetic shielding fan structure, in which a circuit board shielding cover 1 is added between the stator 10 and the circuit board assembly 4. The stator 10 and the circuit board assembly 4 are welded and fixed by terminal posts, and the circuit board shielding cover 1 is reinforced by studs 2, support columns 8, and slotted pan head screws 9, wherein the support columns are located between the circuit board shielding cover and the circuit board assembly, and play a supporting role to prevent the circuit board shielding cover from being sunken and deformed during the tightening process. At the same time, insulating paper 6 is added between the circuit board shielding cover and the circuit board assembly to ensure the insulation of the circuit board assembly. After the above structure is installed, the whole is installed to the housing 5 by studs 2 and slotted countersunk screws 3, creating a relatively closed metal chamber for the circuit board assembly, which plays a role of electromagnetic shielding. At the same time, the environmental adaptability of the fan can be purposefully improved by adding a heat dissipation glue potting method.

[0020] The stud 2, slotted countersunk screw 3, support column 8, slotted pan head screw 9 also play a conductive role. Through clearance fit, the grounding point in the circuit board assembly is connected to the housing through metal structures such as the stud, slotted countersunk screw, support column, slotted pan head screw, etc., so that the fan can achieve good grounding.

[0021] The mounting parts of the electromagnetic shielding fan structure mount the circuit board assembly in the metal chamber formed between the housing and the circuit board shielding cover through fasteners such as screws and studs, which achieves the effect of electromagnetic shielding. At the same time, these mounting parts also connect the grounding point in the circuit board assembly to the housing, without the need for separate wire connection, thus achieving reliable grounding of the fan. The electromagnetic compatibility performance of the fan is significantly improved.

Claims

1. An electromagnetic shielding fan structure, comprising a housing (5), a rotor (7) and a stator (10), characterized in that: It also includes a circuit board assembly (4), the circuit board assembly (4) being welded to the stator (10) via a terminal post, and a circuit board shielding cover (1) being arranged between the circuit board assembly (4) and the stator (10); Insulating paper (6) is arranged between the circuit board shielding cover (1) and the circuit board assembly (4).

2. The electromagnetic shielding fan structure according to claim 1, characterized in that: It also includes a support column (8); the support column (8) is fixed to the circuit board shielding cover (1) via a slotted pan head screw (9); the circuit board assembly (4) is matched with the support column (8) via a slotted countersunk screw (3).

3. The electromagnetic shielding fan structure according to claim 1, characterized in that: The circuit board shielding cover (1), the housing (5) and the insulating paper (6) enclose a space for accommodating the circuit board assembly (4) and realizing a shielding function.

4. The electromagnetic shielding fan structure according to claim 2, characterized in that: It also includes a stud (2); the stud (2), the slotted countersunk screw (3), the support column (8), and the slotted pan head screw (9) are tightly matched to connect the grounding point on the circuit board assembly (4) with the housing (5) while ensuring electrical connection, thereby achieving reliable grounding.

5. The electromagnetic shielding fan structure according to claim 1, characterized in that: The stator (10) is connected to the circuit board assembly (4) by means of tin-lead welding.

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