CN217873352U - Dry-wet dual-purpose totally-enclosed brushless electric fan - Google Patents
Dry-wet dual-purpose totally-enclosed brushless electric fan Download PDFInfo
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- CN217873352U CN217873352U CN202221446991.2U CN202221446991U CN217873352U CN 217873352 U CN217873352 U CN 217873352U CN 202221446991 U CN202221446991 U CN 202221446991U CN 217873352 U CN217873352 U CN 217873352U
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Abstract
The utility model relates to a dry-wet dual-purpose totally-enclosed brushless electric fan, which comprises an electric fan shell, an electric fan rotor, a stator core, a movable impeller, an air guide cover, a circuit board and a circuit board end cover; the electric fan shell comprises an upper aluminum shell and a lower aluminum shell which are hermetically connected with each other, the electric fan rotor is arranged in a space enclosed by the upper aluminum shell and the lower aluminum shell, and the electric fan rotor transfers heat to the upper aluminum shell and/or the lower aluminum shell through the stator iron core for heat dissipation; the circuit board is arranged in a space enclosed by the circuit board end cover and the upper aluminum shell which are hermetically connected with each other, and the outer surface of the power device MOS tube on the circuit board conducts heat to contact the upper surface of the upper aluminum shell through heat conducting glue; the movable impeller rotates and takes away heat on the outer surfaces of the upper aluminum shell and the lower aluminum shell. Can satisfy the waterproof and dual demand of cooling of electric fan through above-mentioned structure, and then make the suction power of this electric fan promote one time compared in the suction power of the electric fan of prior art, can reach 300W.
Description
Technical Field
The utility model relates to a brushless electric fan technical field especially relates to a totally closed brushless electric fan of dual-purpose futilely wets.
Background
With the improvement of living standard of people, more and more families begin to reduce labor and improve life quality by means of various cleaning devices. Current cleaning device uses electric fan as the power supply usually, and miniature electric fan is at long-time during operation, and inside winding and circuit board power device receive electric current and operating time's influence and produce the heat, in order to reduce the influence that generates heat to electric fan performance and life-span, the heat dissipation problem of electric fan can be considered usually in the manufacturing process to the enterprise. At present, the conventional method is to add a heat dissipation impeller to perform air cooling heat dissipation on an electric fan rotor and a circuit board inside the electric fan. However, the dry and wet dual-purpose vacuum cleaner is limited by the use scene of the cleaning device, and a large amount of liquid is sucked in the operation process, so that the discharged wind with moisture cannot directly blow on the charged devices such as windings, circuit boards and the like.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to solve the technical problems, a dry-wet dual-purpose totally-enclosed brushless electric fan is provided, and the dual requirements of water resistance and temperature reduction of the electric fan can be met.
In order to achieve the purpose, the application provides a dry-wet dual-purpose totally-enclosed brushless electric fan which is characterized by comprising an electric fan shell, an electric fan rotor, a stator core, a movable impeller, an air guide cover, a circuit board and a circuit board end cover; the electric fan shell comprises an upper aluminum shell and a lower aluminum shell which are hermetically connected with each other, the electric fan rotor is arranged in a space enclosed by the upper aluminum shell and the lower aluminum shell, and the electric fan rotor transfers heat to the upper aluminum shell and/or the lower aluminum shell through the stator iron core for heat dissipation; a rotating shaft of the electric fan rotor is in sealing fit with the bearing and extends out of the lower aluminum shell, a movable impeller is mounted on a shaft head of the rotating shaft, an air guide cover is mounted on the lower aluminum shell and positioned on the outer side of the movable impeller, exhaust air of the movable impeller of the electric fan is blown to the electric fan shell through the air guide cover, and meanwhile, heat of the electric fan shell is taken away; the circuit board is arranged in a space enclosed by a circuit board end cover and an aluminum shell on the electric fan, which are hermetically connected with each other, the outer surface of a power device MOS tube on the circuit board conducts heat to contact the upper surface of the aluminum shell on the electric fan through heat conducting glue, and a lead of the circuit board penetrates through a wire outlet hole formed in the circuit board end cover in a sealing manner and extends out; the movable impeller rotates and takes away heat conducted to the outer surfaces of the upper aluminum shell and the lower aluminum shell through the electric fan rotor, the stator core and the circuit board.
In one embodiment, the upper aluminum shell and/or the lower aluminum shell are made of aluminum-magnesium alloy or aluminum alloy, and the wire outlet hole and the lead are sealed through a sealant.
In one embodiment, the MOS tube and/or the MCU of the circuit board are directly attached to the upper surface of the upper aluminum shell through the heat-conducting glue.
In one embodiment, a rotating shaft mounting hole is formed in an end cover of the lower aluminum shell, a bearing and a waterproof shaft seal are arranged in the rotating shaft mounting hole, and a rotating shaft of the electric fan rotor extends out of the lower aluminum shell in a sealing mode through the bearing and the waterproof shaft seal.
In one embodiment, the stator core is attached to the inner surface of the upper aluminum shell and/or the lower aluminum shell by a heat conducting adhesive.
In one embodiment, the outer surface of the upper aluminum shell and/or the lower aluminum shell is provided with cooling blades.
In one embodiment, the electric fan further comprises a fixed impeller, wherein the fixed impeller is mounted on the lower aluminum shell or the air guide cover and is positioned between the movable impeller and the lower aluminum shell.
In one embodiment, the fixed impeller is a double fixed impeller.
In one embodiment, the maximum size of the wire outlet hole is less than or equal to 3 times of the diameter of the lead of the circuit board.
In one embodiment, the diameter of the lower aluminum shell gradually increases along the end cover of the lower aluminum shell towards the upper aluminum shell.
In one embodiment, the suction power of the electric fan exceeds 300W.
Above-mentioned dry and wet dual-purpose totally closed brushless electric fan sets up in last aluminum hull, lower aluminum hull and the sealed space that encloses of circuit board end cover through sealed electric fan rotor and circuit board, and electric fan rotor and circuit board contact electric fan go up aluminum hull and/or lower aluminum hull through heat-conducting glue heat conductivity to satisfy the waterproof and dual demand of cooling down of electric fan under having water operational environment.
Drawings
FIG. 1 is a schematic perspective view of an electric blower according to an embodiment;
FIG. 2 is a cross-sectional view of an electric blower in one embodiment;
FIG. 3 is a perspective view of a circuit board in one embodiment;
FIG. 4 is a schematic perspective view of an embodiment of an electric fan with circuit board end caps and circuit boards removed;
fig. 5 is a partially enlarged view of the electric blower in fig. 2 at a.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings. The use of terms herein such as "upper," "lower," "below," "first end," "second end," "one end," "another end," and the like, to denote relative spatial positions, is for convenience of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Furthermore, the terms "mounted", "disposed", "provided", "connected", "slidably connected", "fixed" and "sleeved" are to be understood in a broad sense. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
As shown in fig. 1 to 5, a dry-wet dual-purpose totally-enclosed brushless electric fan comprises an electric fan housing 200, an electric fan rotor 100, a stator core 101, a movable impeller 301, an air guide cover 302, a circuit board 401 and a circuit board end cover 402; the electric fan housing 200 comprises an upper aluminum housing 201 and a lower aluminum housing 202 which are hermetically connected with each other, the electric fan rotor 100 is arranged in a space enclosed by the upper aluminum housing 201 and the lower aluminum housing 202, and the electric fan rotor 100 transfers heat to the upper aluminum housing 201 and/or the lower aluminum housing 202 through a stator core for heat dissipation; a rotating shaft 102 of the electric fan rotor 100 is in sealing fit with a bearing 1022 and extends out of the lower aluminum shell 202, a movable impeller 301 is mounted at a shaft head of the rotating shaft 102, an air guide cover 302 is mounted on the lower aluminum shell 202 and positioned on the outer side of the movable impeller 301, a cooling air channel is formed between the air guide cover 302 and the electric fan shell 200 and extends from the lower aluminum shell 202 to the upper aluminum shell 201, that is, airflow B exhausted by the electric fan movable impeller 301 is blown to the electric fan shell 200 through the air guide cover 302 and simultaneously takes away heat of the electric fan shell; the circuit board 401 is arranged in a space enclosed by a circuit board end cover 402 and an upper aluminum shell 201 which are hermetically connected with each other, the outer surfaces of 3-6 power device MOS tubes on the circuit board 401 are in heat conduction contact with the upper surface of the upper aluminum shell 201 of the electric fan through heat conducting glue, and a lead 4011 of the circuit board 401 penetrates through a wire outlet 4021 formed in the circuit board end cover 402 in a sealing mode and extends out; the movable impeller 301 rotates and drives fluid to pass through the cooling air duct, and takes away heat conducted to the outer surfaces of the upper aluminum shell 201 and the lower aluminum shell 202 by the electric fan rotor 100, the stator core 101 and the circuit board 401.
In one embodiment, the upper aluminum housing 201 and/or the lower aluminum housing 202 are made of aluminum-magnesium alloy or aluminum alloy, and the wire outlet 4021 and the wire 4011 are sealed by a sealant.
In one embodiment, the MOS transistor and/or the MCU of the circuit board 401 is directly attached to the upper surface of the upper aluminum case 201 through a thermal conductive adhesive.
In one embodiment, the number of the MOS tubes is 5.
In one embodiment, the upper surface of the upper aluminum casing 201 is provided with a groove 2011 which is matched with the MOS transistor and/or the MCU in shape, and the groove 2011 is filled with a heat-conducting glue.
In one embodiment, a rotating shaft mounting hole 2021 is formed in an end cover of the lower aluminum housing 202, a bearing 1022 and a waterproof shaft seal 1021 are disposed in the rotating shaft mounting hole 2021, and the rotating shaft 102 of the electric fan rotor 100 extends out of the lower aluminum housing 202 in a sealed manner through the bearing 1022 and the waterproof shaft seal 1021.
In one embodiment, the stator core 101 is attached to the inner surface of the upper aluminum case 201 and/or the lower aluminum case 202 by a heat conductive adhesive.
In one embodiment, the outer surface of the upper aluminum shell 201 and/or the lower aluminum shell 202 is provided with cooling blades 203, and the cooling blades are arranged to improve the cooling effect.
In one embodiment, the electric blower further comprises a fixed impeller 303, wherein the fixed impeller 303 is mounted on the lower aluminum casing 202 or the air guide cover 302 and is located between the movable impeller 301 and the lower aluminum casing 202, and the fluid B can be guided to flow to the upper aluminum casing 201 and/or the lower aluminum casing 202 through the arrangement of the fixed impeller.
In one embodiment, the fixed impeller is a double fixed impeller.
In order to facilitate the installation of a circuit board lead in a wire outlet of an electric fan in the prior art, the diameter of the wire outlet (the diameter is circular when the wire outlet is circular, and the diameter refers to the maximum size when the wire outlet is non-circular) is usually set to be 3 times or even more than 10 times larger than the diameter of the lead, the sealing is realized through a rubber gasket, the rubber gasket is easy to deform, and a gap is inevitably formed between the rubber gasket and the circuit board lead, so that the sealing effect is poor, and the water prevention of the electric fan cannot be really realized; the application creatively seals the wire outlet 4021 and the lead wires by sealing glue by enabling the maximum diameter of the wire outlet 4021 to be less than or equal to 3 times of the diameter of the lead wires 4011 of the circuit board 401, so that the real meaningful full sealing is realized.
In one embodiment, the diameter of the lower aluminum housing 202 gradually increases along the end cap thereof toward the upper aluminum housing 201.
According to the dry-wet dual-purpose totally-enclosed brushless electric fan, the electric fan rotor 100 and the circuit board 401 are arranged in a space defined by the upper aluminum shell 201, the lower aluminum shell 202 and the circuit board 401 in a sealing mode, and the electric fan rotor 100 and the circuit board 401 are in contact with the upper aluminum shell 201 and/or the lower aluminum shell 202 of the electric fan through the heat conduction glue in a heat conduction mode, so that the waterproof and cooling dual requirements of the electric fan in a water working environment are met, the suction power of the electric fan is over 300W, and under the condition that isovolumetric equal-power devices are used, the suction power of the electric fan can exceed the suction power of a non-totally-enclosed traditional dry-wet dual-purpose electric fan with a plastic shell by about 100%.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (11)
1. A dry-wet dual-purpose totally-enclosed brushless electric fan is characterized by comprising an electric fan shell (200), an electric fan rotor (100), a stator core (101), a movable impeller (301), an air guide cover (302), a circuit board (401) and a circuit board end cover (402);
the electric fan shell (200) comprises an upper aluminum shell (201) and a lower aluminum shell (202) which are hermetically connected with each other, the electric fan rotor (100) is arranged in a space enclosed by the upper aluminum shell (201) and the lower aluminum shell (202), and the electric fan rotor (100) transfers heat to the upper aluminum shell (201) and/or the lower aluminum shell (202) through a stator iron core (101) for heat dissipation; a rotating shaft (102) of the electric fan rotor (100) is in sealing fit with a bearing (1022) and extends out of the lower aluminum shell (202), a movable impeller (301) is installed on a shaft head of the rotating shaft (102), an air guide cover (302) is installed on the lower aluminum shell (202) and located on the outer side of the movable impeller (301), air exhausted by the movable impeller (301) of the electric fan is blown to the electric fan shell (200) through the air guide cover (302), and meanwhile, heat of the electric fan shell is taken away;
the circuit board (401) is arranged in a space enclosed by a circuit board end cover (402) and an upper aluminum shell (201) of the electric fan, which are hermetically connected with each other, the outer surface of a power device MOS (4012) on the circuit board (401) conducts heat to contact the upper surface of the upper aluminum shell (201) of the electric fan through heat conducting glue, and a lead (4011) of the circuit board (401) hermetically penetrates through a wire outlet hole (4021) formed in the circuit board end cover (402) and extends out;
the movable impeller (301) rotates and takes away heat conducted to the outer surfaces of the upper aluminum shell (201) and the lower aluminum shell (202) through the electric fan rotor (100), the stator core (101) and the circuit board (401).
2. The brushless electric fan as claimed in claim 1, wherein the upper aluminum housing (201) and/or the lower aluminum housing (202) is made of metal aluminum alloy, and the outlet hole (4021) and the lead (4011) are sealed by a sealant.
3. The brushless electric fan according to claim 2, wherein the upper aluminum housing (201) and/or the lower aluminum housing (202) is made of a metal aluminum magnesium alloy.
4. The brushless electric fan according to claim 2, characterized in that the outer surface of the upper aluminum housing (201) and/or lower aluminum housing (202) is provided with cooling blades (203).
5. The brushless electric fan according to claim 4, wherein a rotating shaft mounting hole (2021) is formed in an end cover of the lower aluminum housing (202), a bearing (1022) and a waterproof shaft seal (1021) are disposed in the rotating shaft mounting hole (2021), and the rotating shaft (102) of the electric fan rotor (100) is hermetically extended out of the lower aluminum housing (202) through the bearing (1022) and the waterproof shaft seal (1021).
6. The brushless electric fan of claim 5, wherein the stator core (101) is attached to the inner surface of the upper aluminum case (201) and/or the lower aluminum case (202) by a thermally conductive adhesive.
7. The brushless electric fan as claimed in claim 6, wherein the MCU (4013) of the circuit board (401) is directly attached to the upper surface of the upper aluminum case (201) by a thermally conductive adhesive.
8. The brushless electric fan according to claim 7, further comprising a fixed impeller (303), wherein the fixed impeller (303) is mounted on the lower aluminum housing (202) or the air guide cover (302) and is located between the movable impeller (301) and the lower aluminum housing (202).
9. The brushless electric fan of claim 8 wherein the fixed impeller is a double fixed impeller.
10. The brushless electric fan of claim 9, wherein the maximum dimension of the outlet hole (4021) is less than or equal to 3 times the diameter of the lead (4011) of the circuit board (401).
11. The brushless electric fan of claim 10 wherein the diameter of the lower aluminum housing (202) gradually increases along its end cap in the direction of the upper aluminum housing (201).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221446991.2U CN217873352U (en) | 2022-06-10 | 2022-06-10 | Dry-wet dual-purpose totally-enclosed brushless electric fan |
| PCT/CN2023/099489 WO2023237106A1 (en) | 2022-06-10 | 2023-06-09 | Fully-sealed brushless motor for dry and wet applications, protective structure for motor, and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221446991.2U CN217873352U (en) | 2022-06-10 | 2022-06-10 | Dry-wet dual-purpose totally-enclosed brushless electric fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217873352U true CN217873352U (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221446991.2U Active CN217873352U (en) | 2022-06-10 | 2022-06-10 | Dry-wet dual-purpose totally-enclosed brushless electric fan |
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| Country | Link |
|---|---|
| CN (1) | CN217873352U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023237106A1 (en) * | 2022-06-10 | 2023-12-14 | 莱克电气股份有限公司 | Fully-sealed brushless motor for dry and wet applications, protective structure for motor, and installation method |
-
2022
- 2022-06-10 CN CN202221446991.2U patent/CN217873352U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023237106A1 (en) * | 2022-06-10 | 2023-12-14 | 莱克电气股份有限公司 | Fully-sealed brushless motor for dry and wet applications, protective structure for motor, and installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230118 Address after: No. 1, Xiangyang Road, High tech Zone, Suzhou City, Jiangsu Province, 215000 Patentee after: KINGCLEAN ELECTRIC Co.,Ltd. Patentee after: Jiangsu Laike Intelligent Electrical Appliance Co.,Ltd. Patentee after: KINSUZHOU KINGCLEAN PRECISION MACHINERY Co.,Ltd. Address before: 215000 No. 1 Xiangyang Road, Suzhou New District, Jiangsu Province Patentee before: KINGCLEAN ELECTRIC Co.,Ltd. Patentee before: Jiangsu Laike Intelligent Electrical Appliance Co.,Ltd. |
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| TR01 | Transfer of patent right |