High-speed fan with waterproof cover

Abstract

The utility model discloses a high-speed fan with a waterproof cover, which comprises a shell, an end cover and a PCBA (printed circuit board assembly), the end cover and one end of the shell are integrally formed or fixedly connected, the high-speed fan further comprises the waterproof cover, the waterproof cover contains the end cover and the PCBA, a stator assembly is accommodated in the shell, and the stator assembly is arranged in the shell. A contact pin of the stator assembly penetrates through a through hole formed in the end cover and then is connected with the PCBA, the waterproof cover covers and seals the through hole, the waterproof cover is provided with a wire passing hole, and a waterproof cover body is a cylinder with one end being an open end and the other end being a sealed end. By adding the waterproof cover, the sealing of the through hole of the end cover and the sealing of the joint of the end cover and the shell are realized, and the technical problems of poor waterproof effect and low waterproof grade caused by the fact that the stator assembly and the PCBA of the traditional motor are connected through a pin penetrating through the through hole in the end cover are solved. The beneficial effects of preventing water from entering the end cover through hole and improving the waterproof grade of the motor are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliance high speed fan, especially with a waterproof cover's high speed fan. BACKGROUND

[0002] With the development of consumer electronics technology, the demand of household appliances for high speed fan is increasing, its core performance requirements include high speed (10000-100000 revolutions per minute), low noise, miniaturization and reliability, and the high speed fan with brushless DC motor (BLDC) as the core has become the mainstream, the connection of the control circuit (PCBA) and motor stator assembly is mainly realized through the welding or insertion of the pin, that is, the driving circuit (such as MOSFET module) on the PCBA and the stator winding pin are welded through multiple wires. The stator winding of the brushless motor will generate a strong electromagnetic field during work, which may cause electromagnetic interference (EMI) to the control circuit on the PCBA, resulting in signal distortion or misoperation, and secondly, the stator assembly will generate heat during operation, especially copper loss and iron loss, and the power elements such as MOSFET on the PCBA will also generate heat, if not isolated, the heat may be superimposed, resulting in high temperature, affecting the service life of the components, the existing high speed fan usually adopts isolation design, that is, the PCBA is arranged on both sides of the end cover, so as to isolate into two spaces, allowing independent heat dissipation scheme, that is, the stator assembly directly dissipates heat through the metal shell, the PCBA conducts heat to the low temperature area of the shell through heat conductive silica gel, or an independent heat sink is arranged, to avoid the temperature rise superposition caused by thermal coupling. The end cover must be provided with a through hole for the pin or wire of the PCBA and the stator assembly to pass through to realize electrical connection, and the through hole leads to the sealing of the motor cavity for mounting the stator assembly and rotor assembly, thereby reducing the overall waterproof level of the motor. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies of the prior art, the utility model provides a high speed fan with a waterproof cover, which solves the technical problems of poor waterproof effect and low waterproof level caused by the connection of the stator assembly and PCBA of the traditional motor through the pin passing through the through hole on the end cover.

[0004] The utility model discloses a high speed fan with a waterproof cover, which realizes the above-mentioned purposes through the following technical schemes: a high speed fan with a waterproof cover, including the casing, the end cover, PCBA, the end cover with the casing one end integral molding or fixed connection still include waterproof cover, the waterproof cover contains seal the end cover and PCBA, the casing contains stator assembly, the pin of stator assembly passes through the through hole on the end cover and is connected with PCBA, the waterproof cover covers and seals the through hole, the waterproof cover has the wire hole, the waterproof cover main part is the cylinder with one end as the open end, the other end is the sealed end.

[0005] As preferably, the waterproof cover is made of silica gel material, and the diameter of the waterproof cover is smaller than that of the end cover in the uninstalled state.

[0006] As preferably, the wire passing hole is arranged on the cylindrical surface of the waterproof cover.

[0007] As preferably, the distance between the wire passing hole and the sealed end is smaller than that between the wire passing hole and the open end.

[0008] As preferably, the cross section of the wire passing hole is elliptical for fitting with the wire.

[0009] As preferably, the wire passing hole is a pipe hole with a pipe segment protruding from the cylindrical surface, and the pipe segment is made of heat shrinkable material.

[0010] As preferably, the waterproof cover and the shell are made of the same or similar material, the inner diameter of the open end is larger than that of the sealed end, the inner surface of the sealed end is sleeved on the outer surface of the inner shell end of the shell, and the inner surface and the outer surface are sealed by glue without gap.

[0011] As preferably, the stator assembly, the rotating shaft and the rotor are coaxially arranged in the shell, the bearing chamber is arranged in one end of the shell and the end cover, and the bearing is arranged in the bearing chamber to realize the rotation of the rotating shaft and the rotor relative to the stator assembly.

[0012] As preferably, the fan blade is fixedly connected with one end of the rotating shaft, and the PCBA and the stator assembly are arranged at two ends of the end cover respectively to avoid the high temperature damage of the PCBA.

[0013] As preferably, the shell comprises an outer shell and an inner shell, the end cover is fixedly connected with one end of the inner shell or integrally formed, the inner shell is provided with the stator assembly mounting position and the bearing chamber, and the outer shell has a length difference with one end of the inner shell, and the length difference space is the fan blade mounting position.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a high -speed fan of waterproof cover area, including the casing, end cover, PCBA, the end cover with the one end integral moulding or fixed connection of casing, still include waterproof cover, the stator subassembly is housed in the casing, the needle of stator subassembly passes through the through -hole that sets up on the end cover is connected with PCBA, the waterproof cover covers and seals the through -hole, the waterproof cover has the wire hole, the waterproof cover main part is the cylinder with one end as open -ended, the other end is the sealed end, realizes the end cover through -hole sealing and the connection of end cover and casing with increasing waterproof cover, solve the stator subassembly of traditional motor and PCBA through the needle and pass through the through -hole on the end cover and connect to the poor waterproof effect, the technical problem of not high waterproof grade, has the beneficial effect of avoiding the end cover through -hole water inflow and improving motor waterproof grade. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the drawing needed to use in the embodiment or prior art description simple introduction.

[0017] Figure 1 It is the sectional view of high -speed fan of waterproof cover area of the utility model.

[0018] Figure 2 It is the side view of high -speed fan of waterproof cover area of the utility model.

[0019] Figure 3 It is the schematic view of end cover of high -speed fan of waterproof cover area of the utility model.

[0020] Figure 4 It is waterproof cover schematic view of high -speed fan of waterproof cover area of the utility model.

[0021] Figure 5 It is the sectional view of waterproof cover of high -speed fan of waterproof cover area of the utility model.

[0022] Sign: 1 - casing;11 - outer casing;12 - inner casing;2 - end cover;21 - through -hole;3 - PCBA;4 - waterproof cover;41 - wire hole;411 - pipe section;42 - open -ended;43 - sealed end;5 - stator subassembly;6 - rotating shaft;7 - rotor;8 - fan blade. DETAILED DESCRIPTION

[0023] The utility model will be further described below in conjunction with the drawings and specific embodiment, but the described embodiment is only a part of the embodiment of the utility model, is not all the embodiment. Based on the embodiment in the utility model, all other embodiments that the person of ordinary skill in the art obtains under the premise of not making creative labor belong to the scope of the utility model protection.

[0024] Please refer toFigures 1 to 5 A high-speed fan with a waterproof cover, comprising a shell 1, an end cover 2, a PCBA 3, a stator assembly 5, a rotating shaft 6, a rotor 7 and a fan blade 8, the shell 1 comprises an outer shell 11 and an inner shell 12, the end cover 2 is fixedly connected with one end of the inner shell 12 of the shell 1 by fasteners, the PCBA 3 is installed on the outer side of the end cover 2 relative to the stator assembly 5, the inner shell 12 has a stator assembly installation position and a bearing chamber, the stator assembly 5, the rotating shaft 6 and the rotor 7 are coaxially installed in the cavity of the inner shell 12, the bearing chamber has two, the first bearing chamber is arranged at one end of the inner shell 12, and the second bearing chamber is arranged in the end cover 2, bearings are arranged in the bearing chamber, the rotating shaft 6 stably rotates under the influence of the magnetic field generated by the rotor 7 after the stator assembly 5 is powered on, the other end of the rotating shaft 6 is fixedly connected with the fan blade 8 after extending out of the end of the inner shell 12, the outer shell 11 and one end of the inner shell 12 have a length difference, and the space of the length difference is a fan blade installation position for accommodating the fan blade 8.

[0025] In high-speed fans and other household appliances, based on electrical safety, electromagnetic compatibility, mechanical reliability, thermal management and environmental adaptability and other aspects, the PCBA (printed circuit board assembly) and the stator assembly need to be isolated, therefore, the pins or wires of the stator assembly 5 pass through the through hole 21 arranged on the end cover 2 and are welded to the PCBA 3.

[0026] It also includes a waterproof cover 4, which is made of silica gel, and in the uninstalled state, the diameter of the waterproof cover 4 is smaller than that of the end cover 2, the waterproof cover 4 is sleeved on the outer surface of the end cover 2 and is sealed and fitted, the waterproof cover 4 covers and seals the through hole 21 on the end cover 2 and contains and seals the connection between the end cover 2 and the inner shell 1, the waterproof cover 4 has a wire passing hole 41, the main body of the waterproof cover 4 is a cylinder with one end being an open end 42 and the other end being a sealing end 43, the wire passing hole 41 is arranged on the cylindrical surface of the waterproof cover 4, the distance between the wire passing hole 41 and the sealing end 43 is smaller than the distance between the wire passing hole 41 and the open end 42, the cross section of the wire passing hole 41 is elliptical for fitting with the wire, the wire passing hole 41 is a pipe hole with a pipe segment 411 protruding from the cylindrical surface, and the pipe segment 411 is made of heat-shrinkable material, which can better achieve waterproof effect by tightening the pipe segment 411 through heat-shrinking effect after the wire passes out of the pipe hole.

[0027] In another embodiment, the end cover 2 is integrally formed with one end of the shell 1, and the stator assembly 5, the rotating shaft 6 and the rotor 7 are loaded from the other end of the shell 1.

[0028] In another embodiment, the waterproof cover 4 is the same or similar material as the shell 1, the inner diameter of the waterproof cover 4 has a step offset, the inner diameter of the open end 42 is larger than the inner diameter of the sealing end 43, the outer diameter of the inner shell 12 is tightly fitted with the inner diameter of the open end 42, the inner surface of the open end 42 is sleeved on the outer surface of the end of the inner shell 12, and the overlapping or additional glue sealing is sealed, so that the waterproof cover 4 not only has a good sealing effect on the through hole 21 on the end cover 2, but also can seal the connection between the end cover 2 and the inner shell 12, thereby achieving the best sealing effect; the waterproof cover 4 has a wire passing hole 41, the waterproof cover 4 is a cylinder with one end being an open end 42 and the other end being a sealing end 43, the wire passing hole 41 is arranged on the cylindrical surface of the waterproof cover 4, the distance between the wire passing hole 41 and the sealing end 43 is less than the distance between the wire passing hole 41 and the open end 42, the cross section of the wire passing hole 41 is an oval shape for fitting with the wire, and the wire passing hole 41 is a pipe hole with a pipe segment 411 protruding from the cylindrical surface, after the motor wire connection is completed, a sealing member is used to seal the gap between the wire passing hole 41 and the wire, including but not limited to glue sealing, heat shrink tube sealing, and adhesive tape sealing.

[0029] The above is only a specific embodiment of the present application. Obviously, the present application is not limited to the above embodiments, and many similar modifications can be made, and all modifications directly derived or thought by those skilled in the art from the disclosed content of the present application should be considered as falling within the scope of the present application.

Claims

1. A high-speed fan with a waterproof cover, comprising a shell (1), an end cover (2), and a PCBA (3), the end cover (2) is integrally formed or fixedly connected with one end of the shell (1), characterized in that, Also include waterproof cover (4), the waterproof cover (4) contains the end cover (2) and the PCBA (3) are sealed, the stator assembly (5) is accommodated in the shell (1), the pin of the stator assembly (5) is connected with the PCBA (3) after passing through the through hole (21) provided on the end cover (2), the waterproof cover (4) covers and seals the through hole (21), the waterproof cover (4) has a wire passing hole (41), and the waterproof cover (4) is a cylindrical body with one end being an open end (42) and the other end being a sealing end (43).

2. The high speed fan with a waterproof cover according to claim 1, wherein, The waterproof cover (4) is made of silica gel, and the diameter of the waterproof cover (4) is smaller than the diameter of the end cover (2) in the uninstalled state.

3. The high speed fan with a waterproof cover according to claim 2, wherein, The wire passing hole (41) is arranged on the cylindrical surface of the waterproof cover (4).

4. The high speed fan with a waterproof cover according to claim 3, characterized in that, The distance between the wire passing hole (41) and the sealing end (43) is less than the distance between the wire passing hole (41) and the open end (42).

5. The high speed fan with a waterproof cover according to claim 3, wherein, The cross section of the wire passing hole (41) is oval-shaped, which is used to fit with the wire.

6. The high speed fan with a waterproof cover according to claim 3, wherein, The wire passing hole (41) is a pipe hole with a pipe segment (411) protruding from the cylindrical surface, and the pipe segment (411) is made of heat-shrinkable material.

7. The high speed fan with a waterproof cover according to claim 1, wherein, The waterproof cover (4) and the shell (1) are made of the same material, the inner diameter of the open end (42) is greater than the inner diameter of the sealing end (43), the inner surface of the sealing end (43) is sleeved on the outer surface of the end portion of the inner shell (12) of the shell (1), and there is no gap between the overlapping inner surface and outer surface or the gap is sealed by glue.

8. The high speed fan with a waterproof cover according to claim 1, wherein, The stator assembly (5), the rotating shaft (6) and the rotor (7) are coaxially installed inside the shell (1), one end of the shell (1) and the end cover (2) have a bearing chamber, and the bearing chamber is provided with a bearing for realizing the rotation of the rotating shaft (6) and the rotor (7) relative to the stator assembly (5).

9. The high speed fan with a waterproof cover according to claim 8, wherein, Also include the fan blade (8), the fan blade (8) is fixedly connected with one end of the rotating shaft (6), the PCBA (3) and the stator assembly (5) are respectively arranged at two ends of the end cover (2), so as to avoid high temperature damage of the PCBA (3).

10. The high speed fan of claim 1, wherein, The shell (1) includes an outer shell (11) and an inner shell (12), the end cover (2) is fixedly connected with one end of the inner shell (12) or integrally formed, the inner shell (12) has a stator assembly installation position and a bearing chamber, the outer shell (11) has a length difference with one end of the inner shell (12), and the space of the length difference is a fan blade installation position.

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