Electric fan

Abstract

The utility model discloses an electric fan, which comprises a motor, a fan blade, a fan blade and a fan blade, the movable impeller is rotationally mounted on the rotating shaft; the fixed impeller is fixedly installed on the rotating shaft and arranged between the motor and the movable impeller, a first through hole for the rotating shaft to penetrate through is formed in the fixed impeller, a waterproof platform is arranged on the surface, away from the motor, of the fixed impeller, and a second through hole communicated with the first through hole is formed in the waterproof platform; the outer diameter of the waterproof platform is completely or partially gradually reduced in the direction from the motor to the movable impeller. Through the design of the waterproof platform, water vapor and dust can be isolated outside the motor, oxidation corrosion of the internal structure of the motor is avoided, and short circuit of the internal circuit of the motor is prevented.

Description

Technical Field

[0001] The utility model belongs to the field of electromechanical technology, and in particular relates to an electric fan. Background Art

[0002] A vacuum cleaner is a cleaning appliance that uses a motor to drive the blades to rotate at high speed, creating negative air pressure in a sealed shell, thereby sucking dust and other debris into a dust bag.

[0003] Especially for wet and dry vacuum cleaners, there is a small amount of water vapor in the use environment. With the rapid rotation of the impeller, a small amount of water vapor will rotate between the impeller and the stator. The water vapor will flow along the shaft and enter the motor, which may easily cause oxidation, corrosion, rust and other damage to the motor bearings. When the motor casing is made of metal, it will also cause oxidation, corrosion and rust on the surface of the motor casing. In addition, the water vapor entering the motor will also cause short circuit or damage to the internal circuit of the motor, which will directly affect the normal use of the motor and shorten the service life of the motor.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide an electric blower, which can isolate water vapor and dust from the outside of the motor, avoid oxidation and rust of the internal structure of the motor, and prevent short circuit of the internal circuit of the motor.

[0006] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0007] An electric blower, comprising:

[0008] A motor, including a rotating shaft;

[0009] A moving impeller is rotatably mounted on the rotating shaft;

[0010] A stator impeller is fixedly mounted on the rotating shaft and arranged between the motor and the impeller. The stator impeller is provided with a first through hole for the rotating shaft to pass through. A waterproof platform is provided on the surface of the stator impeller away from the motor. A second through hole connected to the first through hole is provided on the waterproof platform. The outer diameter of the waterproof platform gradually decreases in whole or in part in the direction from the motor to the impeller.

[0011] In one or more embodiments of the present invention, the side wall of the waterproof platform is a plane, a curved surface, or a combination of a plane and a curved surface; and / or,

[0012] The gap between the waterproof platform and the impeller is greater than 0.

[0013] In one or more embodiments of the present invention, the stator impeller includes a base plate, a first ring body arranged on the surface of the base plate away from the movable impeller, blades spaced circumferentially along the first ring body, and a second ring body sleeved outside the blades.

[0014] In one or more embodiments of the present invention, a receiving groove is provided on the bottom plate, and the electric fan further comprises a waterproof structure arranged in the receiving groove, and an inner wall of the waterproof structure abuts against the rotating shaft.

[0015] In one or more embodiments of the present invention, the stator impeller further includes a waterproof cover disposed on the first ring body, and the waterproof cover is sleeved outside the motor.

[0016] In one or more embodiments of the present invention, an abutment platform is provided on the surface of the bottom plate away from the impeller, and the motor abuts against the abutment platform and is thermally connected to the abutment platform.

[0017] In one or more embodiments of the utility model, the abutment platform is provided with a mounting groove, the motor includes a motor housing and a motor body, the motor housing includes a motor housing body abutting the abutment platform and a protrusion arranged in the mounting groove, the motor body is arranged in the motor housing body, and the protrusion is provided with a third through hole for passing through the rotating shaft.

[0018] In one or more embodiments of the utility model, a bearing is provided in the raised portion, and the bearing includes an inner ring mounted on the rotating shaft, an outer ring abutting against the inner wall of the motor housing, and a ball rotatably installed between the inner ring and the outer ring; a boss is provided on the abutment platform, and the boss at least partially protrudes into the third through hole and the distance between the boss and the bearing is greater than 0.

[0019] In one or more embodiments of the present invention, the thickness of the motor housing is 0.5 mm to 1.2 mm; and / or,

[0020] The distance between the boss and the bearing is less than or equal to 0.3 mm; and / or,

[0021] The hole wall of the third through hole is greater than or equal to the inner diameter of the outer ring;

[0022] The outer diameter of the boss is smaller than the inner diameter of the outer ring and larger than the outer diameter of the inner ring;

[0023] The inner diameter of the boss is smaller than the outer diameter of the inner ring.

[0024] In one or more embodiments of the present invention, a sealing groove is provided on the motor housing or the abutment platform, and a sealing member is provided in the sealing groove.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] The utility model provides an electric blower. The electric blower can gather water vapor flowing between a moving impeller and a fixed impeller on the outer wall of the waterproof platform to form water droplets through the design of a waterproof platform. The water droplets drip onto the moving impeller under the action of their own gravity and are thrown out through the moving impeller, thereby reducing the possibility of water vapor entering the interior of the motor. By arranging a waterproof structure in the fixed impeller, the possibility of water vapor entering the interior of the motor can be further reduced. By arranging a boss, the possibility of water vapor entering the interior of the motor can be further reduced, thereby avoiding the occurrence of oxidation, corrosion, rust, damage, etc. of the internal structure of the motor, and preventing the internal circuit of the motor from being short-circuited or damaged.

[0027] The utility model provides an electric fan, which can directly isolate water vapor from contacting a motor shell by setting a waterproof cover, thereby preventing oxidation, corrosion, rust and the like of the motor shell from occurring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic cross-sectional view of the electric fan in one embodiment of the utility model;

[0030] Figure 2 This is a schematic cross-sectional view of a stator wheel in one embodiment of the utility model;

[0031] Figure 3 for Figure 2 A magnified view of the local structure at point A in the middle;

[0032] Figure 4 for Figure 1 A magnified view of the local structure at B in the middle;

[0033] Figure 5 for Figure 4 Enlarged view of the local structure at point C in the middle. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] The technical solution of the present utility model will be described below in conjunction with the accompanying drawings.

[0038] Reference Figure 1 As shown, the electric fan in this embodiment includes: a motor 1, a moving impeller 2, and a stator impeller 3.

[0039] Among them, refer to Figure 1 to Figure 4 As shown, the motor 1 includes a rotating shaft 10; the impeller 2 is rotatably mounted on the rotating shaft 10; the stator impeller 3 is fixedly mounted on the rotating shaft 10 and is arranged between the motor 1 and the impeller 2, and the stator impeller 3 is provided with a first through hole 310 for the rotating shaft 10 to pass through, and a waterproof platform 4 is provided on the surface of the stator impeller 3 away from the motor 1, and a second through hole 41 connected to the first through hole 310 is provided on the waterproof platform 4, and the outer diameter of the waterproof platform 4 is gradually reduced in whole or in part in the direction from the motor 1 to the impeller 2.

[0040] It should be noted that, as the impeller 2 rotates rapidly, a small amount of water vapor will rotate between the impeller 2 and the fixed impeller 3. Therefore, when the structure of the fixed impeller 3 is improved, the water vapor will first gather on the outer wall of the waterproof platform 4, and the gathered water vapor will form water droplets, which will drip onto the surface of the impeller 2 under the gravity of the water droplets themselves. Since the impeller 2 rotates rapidly, the dripping water droplets can be thrown out by the impeller 2. The fixed impeller 3 can prevent water vapor from gathering at the rotating shaft 10 and entering the motor 1 through the rotating shaft 10 through the waterproof platform 4, thereby reducing the total amount of water vapor entering the motor 1, thereby preventing the internal structure of the motor 1 from being oxidized, corroded, rusted, damaged, etc., and preventing the internal circuit of the motor 1 from being short-circuited. In addition, since the water vapor will carry dust, while preventing water vapor, the dust can also be isolated outside the impeller 3 and the motor 1.

[0041] For example, refer to Figure 3 As shown, the side wall of the waterproof platform 4 in this embodiment is an arc-shaped curved surface, and the curved surface is curved away from the impeller 2. According to this design, it is beneficial to process the waterproof platform 4, and it is more conducive to water droplets dripping onto the surface of the impeller 2 due to their own gravity. Of course, the present application is not limited to this. The side wall of the waterproof platform 4 in other embodiments can be a plane, or a combination of a plane and a curved surface, or a combination of a plane and a plane, or a curved surface curved toward the impeller 2. As long as the outer diameter of the waterproof platform 4 is gradually reduced in whole or in part from the motor 1 to the impeller 2, similar technical effects can be achieved. Therefore, the above technical solutions are all within the protection scope of the present utility model.

[0042] Optional, see Figure 4 As shown, the gap between the waterproof platform 4 and the impeller 2 in this embodiment is greater than 0. According to this design, water drops dripping onto the surface of the impeller 2 facing the stator impeller 3 can be prevented from flowing along the surface of the waterproof platform 4 facing the stator impeller 3 to the rotating shaft 10 of the motor 1, and the dripping water drops can be prevented from flowing to the rotating shaft 10 or even inside the motor 1.

[0043] Specifically, refer to Figure 3 As shown, the fixed impeller 3 in this embodiment includes a bottom plate 31, a first ring body 32 arranged on the surface of the bottom plate 31 away from the impeller 2, blades 33 spaced apart along the circumferential direction of the first ring body 32, and a second ring body 34 sleeved outside the blades 33. The waterproof platform 4 is arranged on the surface of the bottom plate 31 facing the fixed impeller 3. In order to facilitate the bearing 13 to pass through the fixed impeller 3, a first through hole 310 is arranged on the bottom plate 31, and in order to facilitate the bearing 13 to pass through the waterproof platform 4, a second through hole 41 is arranged on the waterproof platform 4.

[0044] Preferably, in order to improve the waterproofness of the motor 1, refer to Figure 2 As shown, the stator wheel 3 in this embodiment also includes a waterproof cover 35 arranged on the first ring body 32, and the waterproof cover 35 is sleeved outside the motor 1. The waterproof cover 35 and the first ring body 32 can be an integrated design or a split design. The gas with water vapor from the outside passes through the impeller 2 and the stator wheel 3 and hits the outer wall of the waterproof cover 35. The waterproof cover 35 can directly isolate the water vapor from contacting the motor housing 11, thereby avoiding oxidation, corrosion, rusting, etc. of the motor housing 11, and preventing the gas with water vapor from entering the interior of the motor 1, so as to further provide waterproof protection for the internal structure of the motor 1 and the motor housing 11.

[0045] Preferably, since the waterproof platform 4 can only prevent water vapor from gathering at the rotating shaft 10 and entering the motor 1 through the rotating shaft 10, thereby reducing the total amount of water vapor entering the motor 1, some water vapor still cannot be blocked by the waterproof platform 4 and enters the motor 1. In order to prevent the water vapor entering the motor 1 from affecting the inside of the motor 1, refer to Figure 3 , Figure 4 As shown, a receiving groove 311 is provided on the bottom plate 31 in this embodiment, and the electric blower also includes a waterproof structure 5 arranged in the receiving groove 311, and the inner wall of the waterproof structure 5 is in contact with the rotating shaft 10. Among them, the waterproof structure 5 can be wool felt and / or grease made of waterproof material. Grease has a good water-proof function, and will not generate resistance and load on the rotation of the rotating shaft 10, effectively maintaining the high-power operation of the motor 1. Preferably, the grease summarized in this embodiment can be selected as HP-R380 high-temperature lubricating grease. In order to prevent grease from leaking out of the stator 3 from the rotating shaft 10, a wool felt can be placed in the receiving groove 311, and the wool felt can absorb and store grease. According to this design, water vapor that passes through the waterproof platform 4 and flows into the stator 3 along the rotating shaft 10 can be prevented from being blocked by the waterproof structure 5, thereby preventing it from flowing into the motor 1 along the rotating shaft 10, thereby improving the waterproofness of the electric blower.

[0046] For ease of installation, refer to Figure 3 , Figure 4 As shown, in this embodiment, a contact platform 312 is provided on the surface of the bottom plate 31 away from the impeller 2, and the motor 1 contacts the contact platform 312 and is thermally connected to the contact platform 312. According to this design, it is convenient to position and install the motor 1, and the rotating shaft 10 of the motor 1 passes through the contact platform 312, the bottom plate 31, and the waterproof platform 4 in sequence before installing the impeller 2.

[0047] To facilitate the installation of motor 1, refer to Figure 4 As shown, the abutment platform 312 in this embodiment is provided with a mounting groove 3121, the motor 1 includes a motor housing 11 and a motor body 12, the motor housing 11 includes a motor housing body 111 abutting against the abutment platform 312 and a protrusion 112 disposed in the mounting groove 3121, the motor body 12 is disposed in the motor housing body 111, and the protrusion 112 is provided with a third through hole 1121 for penetrating the rotating shaft 10, and the third through hole 1121 allows the rotating shaft 10 to extend out of the motor housing 11. Through the positioning and matching of the protrusion and the mounting groove 3121, the motor 1 can be fixedly installed more quickly and accurately, and the motor 1 and the stator impeller 3 can be prevented from being misaligned or separated.

[0048] Although the waterproof platform 4 can play a waterproof role, and the waterproof structure 5 can play a further waterproof role, some water vapor may still enter the motor housing 11 through the third through hole 1121 after passing through the waterproof platform 4 and the waterproof structure 5. In order to prevent the entry of water vapor passing through the waterproof platform 4 and the waterproof structure 5, refer to Figure 4As shown, in this embodiment, the protrusion 112 is provided with a bearing 13, and the bearing 13 includes an inner ring 131 mounted on the rotating shaft 10, an outer ring 133 abutting against the inner wall of the motor housing 11, and a ball 132 rotatably mounted between the inner ring 131 and the outer ring 133. The arrangement of the bearing 13 can reduce the friction between the motor housing 11 and the rotating shaft 10 during the operation of the motor 1. Figure 4 , Figure 5 As shown, a boss 313 is provided on the abutment platform 312 in this embodiment, and the boss 313 at least partially protrudes into the third through hole 1121 and the distance between the boss 313 and the bearing 13 is greater than 0. The design of the boss 313 can further reduce the possibility of water vapor entering the interior of the motor 1. Of course, the present application is not limited to this. When only the waterproof platform 4 is provided in the electric fan but the waterproof structure 5 is not provided, the boss 313 can still be provided, and the boss 313 can play a further waterproof role, which can be understood and accepted by those skilled in the art.

[0049] Specifically, the motor housing 11 in this embodiment has a thickness of 0.5 mm to 1.2 mm, and the distance between the boss 313 and the bearing 13 is less than or equal to 0.3 mm. For example, the motor housing 11 in this embodiment may be 0.8 mm, and the distance between the boss 313 and the bearing 13 is 0.3 mm.

[0050] Specifically, refer to Figure 5 As shown, the hole wall of the third through hole 1121 in this embodiment is greater than or equal to the inner diameter of the outer ring 133, and the motor housing 11 can abut against the outer ring 133 of the bearing 13. The outer diameter of the boss 313 in this embodiment is smaller than the inner diameter of the outer ring 133 and larger than the outer diameter of the inner ring 131, and the inner diameter of the boss 313 is smaller than the outer diameter of the inner ring 131. On the plane perpendicular to the rotating shaft 10, the orthographic projection range of the boss 313 at least partially overlaps with the orthographic projection range of the inner ring 131, and the orthographic projection range of the boss 313 does not overlap with the orthographic projection range of the outer ring 133.

[0051] Preferably, in order to prevent water vapor from flowing into the gap between the groove wall of the installation groove 3121 and the outer wall of the motor housing 11, Figure 4 As shown, in this embodiment, a sealing groove 1111 is provided on the motor housing 11, and a sealing member 6 is provided in the sealing groove 1111. Of course, the present application is not limited thereto, and a sealing groove 1111 may also be provided on the abutting platform 312, and a sealing member 6 may be provided in the sealing groove 1111; or, a first sealing groove 1111 is provided on the motor housing 11, and a second sealing groove 1111 corresponding to the first sealing groove 1111 is provided on the abutting platform 312, and the sealing member 6 is provided in the first sealing groove 1111 and the second sealing groove 1111. The above technical solutions are all understandable and acceptable to those skilled in the art, and are all within the scope of protection.

[0052] It can be seen from the above technical solutions that the utility model has the following beneficial effects:

[0053] The utility model provides an electric blower. The electric blower can gather water vapor flowing between a moving impeller and a fixed impeller on the outer wall of the waterproof platform to form water droplets through the design of a waterproof platform. The water droplets drip onto the moving impeller under the action of their own gravity and are thrown out through the moving impeller, thereby reducing the possibility of water vapor entering the interior of the motor. By arranging a waterproof structure in the fixed impeller, the possibility of water vapor entering the interior of the motor can be further reduced. By arranging a boss, the possibility of water vapor entering the interior of the motor can be further reduced, thereby avoiding the occurrence of oxidation, corrosion, rust, damage, etc. of the internal structure of the motor, and preventing the internal circuit of the motor from being short-circuited or damaged.

[0054] The utility model provides an electric fan, which can directly isolate water vapor from contacting a motor shell by setting a waterproof cover, thereby preventing oxidation, corrosion, rust and the like of the motor shell from occurring.

[0055] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric fan, characterized in that: The electric fan comprises: A motor, including a rotating shaft; A moving impeller is rotatably mounted on the rotating shaft; A stator impeller is fixedly mounted on the rotating shaft and arranged between the motor and the impeller. The stator impeller is provided with a first through hole for the rotating shaft to pass through. A waterproof platform is provided on the surface of the stator impeller away from the motor. A second through hole connected to the first through hole is provided on the waterproof platform. The outer diameter of the waterproof platform gradually decreases in whole or in part in the direction from the motor to the impeller.

2. The electric blower according to claim 1, characterized in that: The side wall of the waterproof platform is a plane, a curved surface, or a combination of a plane and a curved surface; and / or, The gap between the waterproof platform and the impeller is greater than 0.

3. The electric blower according to claim 1, characterized in that: The fixed impeller comprises a bottom plate, a first ring body arranged on a surface of the bottom plate away from the movable impeller, blades spaced apart along the circumference of the first ring body, and a second ring body sleeved outside the blades.

4. The electric blower according to claim 3, characterized in that: The bottom plate is provided with a receiving groove, and the electric fan further comprises a waterproof structure arranged in the receiving groove, and the inner wall of the waterproof structure is in contact with the rotating shaft.

5. The electric blower according to claim 3, characterized in that: The stator impeller further comprises a waterproof cover arranged on the first ring body, and the waterproof cover is sleeved outside the motor.

6. The electric blower according to claim 3, characterized in that: An abutment platform is provided on the surface of the bottom plate away from the impeller, and the motor abuts on the abutment platform and is thermally connected to the abutment platform.

7. The electric blower according to claim 6, characterized in that: The abutment platform is provided with a mounting groove, the motor includes a motor housing and a motor body, the motor housing includes a motor housing body abutting the abutment platform and a protrusion arranged in the mounting groove, the motor body is arranged in the motor housing body, and the protrusion is provided with a third through hole for passing through the rotating shaft.

8. The electric blower according to claim 7, characterized in that: A bearing is provided in the raised portion, and the bearing includes an inner ring installed on the rotating shaft, an outer ring abutting against the inner wall of the motor housing, and a ball rotatably installed between the inner ring and the outer ring; a boss is provided on the abutment platform, and at least part of the boss protrudes into the third through hole and the distance between the boss and the bearing is greater than 0.

9. The electric blower according to claim 8, characterized in that: The thickness of the motor housing is 0.5 mm to 1.2 mm; and / or, The distance between the boss and the bearing is less than or equal to 0.3 mm; and / or, The hole wall of the third through hole is greater than or equal to the inner diameter of the outer ring; The outer diameter of the boss is smaller than the inner diameter of the outer ring and larger than the outer diameter of the inner ring; The inner diameter of the boss is smaller than the outer diameter of the inner ring.

10. The electric blower according to claim 7, characterized in that: The motor housing or the abutment platform is provided with a sealing groove, and a sealing member is provided in the sealing groove.

Images