Waterproof fan with self-cooling system

Abstract

A waterproof fan with a self-cooling system comprises a fixed impeller, a waterproof machine shell, a rear cover, a driving assembly, a wind scooper and a movable impeller, the wind scooper comprises an inner-layer cover body and an outer-layer cover body arranged outside the inner-layer cover body, and a gap allowing airflow to pass through is formed between the inner-layer cover body and the outer-layer cover body; the fixed impeller is provided with a step-shaped side wall used for being connected with the inner-layer cover body and the outer-layer cover body in a clamped mode, the step-shaped side wall is provided with a large-diameter part and a small-diameter part, the bottom end of the inner-layer cover body is connected with the small-diameter part in a clamped mode, and the bottom end of the outer-layer cover body is connected with the large-diameter part in a clamped mode. A first ventilation hole communicated with the inner side and the outer side of the fixed impeller is formed in the large-diameter portion of the stepped side wall of the fixed impeller, a positioning ventilation groove allowing airflow to be guided into a gap between the inner-layer cover body and the outer-layer cover body is formed in the position, corresponding to the first ventilation hole, of the outer-layer cover body, and a second ventilation hole is formed in the end face of the rear cover. The fan has the advantages that the fan is provided with a heat dissipation structure, and meanwhile the good waterproof effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of driving elements, and particularly relates to a waterproof fan with a self-cooling system. Background Art

[0002] During the operation of the fan, the internal components will continuously generate heat. As the working time increases, the heat will gradually accumulate. When the body overheats, it may directly burn out the fan, rendering the fan scrapped. In severe cases, it may even ignite external products, posing a fire hazard. Therefore, people usually do not use the fan for too long to avoid overheating, which also limits the usage scenarios of the fan. At the same time, when the fan introduces high-speed air flow, it will also inhale some liquid small water droplets in the air, causing the liquid to enter the interior and resulting in malfunctions in the circuit part, presenting a safety hazard. Content of the Utility Model

[0003] To solve the above problems, the utility model provides a waterproof fan with a self-cooling system.

[0004] The utility model adopts the following technical scheme:

[0005] A waterproof fan with a self-cooling system, comprising:

[0006] A fixed impeller, a waterproof housing and a rear cover, and the fixed impeller, the waterproof housing and the rear cover are sequentially connected to form a first accommodation space;

[0007] A driving assembly, which is arranged in the first accommodation space;

[0008] An air guide cover, which is arranged on the side of the fixed impeller far away from the driving assembly;

[0009] A moving impeller, which is arranged in the air guide cover, and the power output end of the driving assembly passes through the fixed impeller and is connected to the moving impeller to transmit power;

[0010] The air guide cover includes an inner layer cover body and an outer layer cover body arranged outside the inner layer cover body. There is a gap for air flow between the inner layer cover body and the outer layer cover body. The fixed impeller is provided with a stepped side wall for clamping the inner layer cover body and the outer layer cover body. The stepped side wall has a large-diameter part and a small-diameter part. The bottom end of the inner layer cover body is clamped to the small-diameter part, and the bottom end of the outer layer cover body is clamped to the large-diameter part. The large-diameter part of the stepped side wall of the fixed impeller is provided with a first ventilation hole communicating the inside and outside of the fixed impeller. The outer layer cover body is provided with a positioning ventilation groove at a position corresponding to the first ventilation hole for guiding air flow into the gap between the inner layer cover body and the outer layer cover body. The end face of the rear cover is provided with a second ventilation hole.

[0011] Optionally, the stationary impeller further includes: an inner support cylinder, an outer support cylinder, and a plurality of guide vanes disposed between the inner support cylinder and the outer support cylinder. The outer support cylinder has the stepped side wall. The first ventilation hole is disposed in at least one guide vane and transversely penetrates the inner support cylinder, the outer support cylinder, and the guide vane. The plurality of guide vanes are annularly arranged in an array with the axis of the inner support cylinder as the center. The inner support cylinder is snap-connected to the waterproof housing.

[0012] Optionally, a flaring groove is provided on one side of the outer wall of the large-diameter portion where the first ventilation hole is located.

[0013] Optionally, a positioning platform is provided on the large-diameter portion of the stationary impeller, and a positioning ventilation groove is provided at the position of the outer layer cover corresponding to the positioning platform.

[0014] Optionally, a plurality of support ribs are provided at the bent portion inside the outer layer cover.

[0015] Optionally, a plurality of reflux grooves are provided inside the outer layer cover.

[0016] Optionally, a plurality of air outlet grooves are provided on the inner side of the outer layer cover near the air inlet.

[0017] Optionally, the outer surface of the waterproof housing is an arc surface.

[0018] Optionally, a process positioning groove is provided on one side of the waterproof housing connected to the stationary impeller, and a positioning protrusion cooperating with the process positioning groove is provided on the outer wall of the inner support cylinder of the stationary impeller.

[0019] Optionally, a sealing material is coated at the connection of the stationary impeller, the waterproof housing, and the rear cover.

[0020] The beneficial effects of the present utility model are that the fan is self-equipped with a heat dissipation structure. When the fan is working, the rotation of the moving impeller drives the air flow to generate the Bernoulli effect, so that the air flow channel extracts the gas in the first accommodation space, and at the same time takes away the heat generated inside the accommodation space due to the operation of the driving component, achieving the heat dissipation effect, which can effectively extend the continuous working time, reduce the risk of overheating, and at the same time can effectively prevent water droplets from entering the fan, playing a good waterproof effect. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the split state of the present utility model;

[0022] Figure 2 is a schematic internal structure diagram of the present utility model;

[0023] Figure 3 is Figure 2 the enlarged view at A in

[0024] Figure 4Schematic diagram of the stationary impeller structure of the present utility model;

[0025] Figure 5 Schematic diagram of the structure of the flared groove provided on the stationary impeller of the present utility model;

[0026] Figure 6 Schematic diagram of the outer cover structure of the present utility model;

[0027] Figure 7 Schematic diagram of the waterproof housing structure of the present utility model;

[0028] Figure 8 Schematic diagram of the moving impeller structure of the present utility model. Detailed implementation manners

[0029] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Embodiment

[0030] As Figures 1-3 shown in FIGS. 6, a waterproof fan with a self-cooling system includes:

[0031] A stationary impeller 1, a waterproof housing 2 and a rear cover 3, and the stationary impeller 1, the waterproof housing 2 and the rear cover 3 are sequentially connected to form a first accommodation space;

[0032] A driving assembly 4, and the driving assembly 4 is arranged in the first accommodation space;

[0033] An air guide cover 5, and the air guide cover 5 is arranged on the side of the stationary impeller 1 away from the driving assembly 4;

[0034] A moving impeller 6, and the moving impeller 6 is arranged in the air guide cover 5, and the power output end of the driving assembly 4 passes through the stationary impeller 1 and is connected to the moving impeller 6 to transmit power;

[0035] The air guide cover 5 includes an inner cover body 51 and an outer cover body 52 disposed outside the inner cover body 51. There is a gap 53 for air flow between the inner cover body 51 and the outer cover body 52. The fixed impeller 1 is provided with a stepped side wall for clamping the inner cover body 51 and the outer cover body 52. The stepped side wall has a large-diameter portion 11 and a small-diameter portion 12. The bottom end of the inner cover body 51 is clamped to the small-diameter portion 12, and the bottom end of the outer cover body is clamped to the large-diameter portion 11. A first ventilation hole 13 communicating the inside and outside of the fixed impeller 1 is formed in the large-diameter portion 11 of the stepped side wall of the fixed impeller 1. A positioning ventilation groove 521 for guiding air flow into the gap 53 between the inner cover body 51 and the outer cover body 52 is provided at a position of the outer cover body 52 corresponding to the first ventilation hole 13. A second ventilation hole 31 is provided on the end face of the rear cover 3.

[0036] When the fan is working, the first accommodation space composed of the fixed impeller 1, the waterproof housing 2 and the rear cover 3 serves as a waterproof cavity, which can effectively protect the driving component 4 located inside and prevent the liquid carried in the high-speed passing air flow from entering the inside and causing circuit component failures. During the process of the driving component 4 driving the moving impeller 6 to rotate at a high speed, external air is driven by the moving impeller 6 and inhaled into the air guide cover 5, and then blown backward through the fixed impeller 1 to form the required high-speed air flow. According to the principle of Bernoulli effect, at this time, high-speed air flow flows through the outlet of the gap between the inner cover body 51 and the outer cover body 52, reducing the pressure, thereby starting to extract the air flow in the gap. The gap between the inner cover body 51 and the outer cover body 52 is communicated with the inside of the fixed impeller 1 through the first ventilation hole 13 on the fixed impeller 1, that is, communicated with the first accommodation space, so as to extract the heat-carrying air flow heated by the driving component 4 in the first accommodation space to achieve heat dissipation. And the external air flow at the lower air outlet is inhaled into the first accommodation space through the second ventilation hole 31 to realize the heat dissipation air flow circulation. The flow rate of the heat dissipation air flow is small, and only simple waterproof measures are needed to ensure that no water droplets are inhaled.

[0037] As Figures 3-5 As shown, the fixed impeller 1 further includes: an inner support cylinder 14, an outer support cylinder 15, and a plurality of guide vanes 16 disposed between the inner support cylinder 14 and the outer support cylinder 15. The outer support cylinder 15 has the stepped side wall. The first ventilation hole 13 is disposed in at least one guide vane 16 and horizontally penetrates the inner support cylinder 14, the outer support cylinder 15, and the guide vane 16 for communicating the first accommodation space. The plurality of guide vanes 16 are annularly arranged around the axis of the inner support cylinder 14, and the inner support cylinder 14 is clamped to the waterproof housing 2.

[0038] As Figure 5As shown, in other embodiments, a flared groove 111 is provided on one side of the outer wall of the large-diameter portion 11 where the first ventilation hole 13 is located, so that there is more space for the first ventilation hole 13 and the positioning ventilation groove 521 on the outer layer cover 52 to allow air flow to enter smoothly.

[0039] As Figures 4-6 shown, in other embodiments, in order to enable the outer layer cover 52 to be quickly and accurately installed on the stationary impeller 1 during assembly, a positioning table 112 is provided on the large-diameter portion 11 of the stationary impeller 1, and a positioning ventilation groove 521 is provided at the position of the outer layer cover 52 corresponding to the positioning table 112. The positioning ventilation groove 521 has both ventilation and positioning functions. When the outer layer cover 52 is installed on the stationary impeller 1, quick alignment can be achieved, enabling one of the positioning ventilation grooves 521 to be aligned with the first ventilation hole 13, ensuring smooth flow of cooling air during the operation of the fan and ensuring the function of the fan's self-cooling system, aiming to obtain a stable production process and stable product performance.

[0040] As Figure 6 shown, in other embodiments, a plurality of support ribs 522 are provided at the bent portion inside the outer layer cover 52. Since a hollow gap 53 cavity needs to be formed between the outer layer cover 52 and the inner layer cover 51, the outer layer cover 52 has a relatively thin thickness. To prevent deformation or breakage due to external forces, a plurality of support ribs 522 are provided on the outer layer cover 52 to play a supporting role in axial force, protect the fan from external force damage, and increase the strength of the outer layer cover 52.

[0041] As Figure 6 shown, in other embodiments, a plurality of return grooves 523 are provided inside the outer layer cover 52. On the one hand, it reduces the weight of the product, and on the other hand, it forms an air flow cavity. When the fan is working, the air flow velocity is weakened when flowing through the surface, reducing wind noise.

[0042] As Figure 6 shown, in other embodiments, a plurality of air outlet grooves 525 are provided on the inner side of the outer layer cover 52 near the air inlet 524 to enhance the Bernoulli effect and improve the heat dissipation efficiency.

[0043] As Figure 7 shown, in other embodiments, the outer surface of the waterproof housing 2 is an arc surface, so that when combined with the stationary impeller 1, it forms a smooth flow surface, reducing the resistance suffered by the gas when flowing through and thus reducing wind noise.

[0044] As Figure 4 、 5, as shown in FIGS. 7, in other embodiments, a process positioning groove 21 is provided on one side of the waterproof housing 2 connected to the stationary impeller 1, and a positioning protrusion 17 cooperating with the process positioning groove 21 is provided on the outer wall of the inner support cylinder 14 of the stationary impeller 1. Ensure that during the assembly process, the stationary impeller 1 and the waterproof housing 2 are accurately positioned, which is beneficial to the automatic assembly operation of the fan during the production of subsequent workstations and accurately position the fan body.

[0045] In other embodiments, a sealing material is coated at the joints of the stationary impeller 1, the waterproof housing 2 and the rear cover 3 to ensure the sealing of the joint parts between the stationary impeller 1, the waterproof housing 2 and the rear cover 3 and prevent external liquid from entering the interior of the fan.

[0046] As Figure 8 shown, the impeller 6 includes: a backing plate 61, an arc-shaped top plate 62 and a plurality of blades 63 arranged between the backing plate 61 and the arc-shaped top plate 62. A shaft hole is provided in the center of the backing plate 61 for connecting to the power output end of the drive assembly 4. The blades 63 are arranged in a circular array at the edge of the backing plate 61 with the center of the backing plate 61 as the center of the circle, and an air inlet is provided in the middle of the arc-shaped top plate 62.

[0047] As Figure 1 shown, the drive assembly 4 includes: a stator 41, a rotor 42, a stator base 43 and a drive control board 44. The stator 41 is arranged on the stator base 43, the rotor 42 is arranged inside the stator 41, a magnet is provided on the part of the rotor 42 located inside the stator 41, the power output end of the rotor 42 passes through the opening in the center of the stationary impeller 1 and is connected to the impeller 6, and the drive control board 44 is arranged on the stator base 43 and is electrically connected to the coil inside the stator 41 to provide the required working current for the coil inside the stator 41 to generate a magnetic field and drive the rotor 42 with a magnet to rotate. During assembly, the stator base 43 and the drive control board 44 can be screwed and fixed to the rear cover 3.

[0048] As Figure 2 shown, a first bearing seat for installing a bearing is provided on one side of the middle part of the stationary impeller 1 close to the drive assembly 4, and a second bearing seat for installing a bearing is provided in the middle of the stator base 43 to provide bearing support for the internal rotor 42.

[0049] The beneficial effect of the present utility model is that the fan has a self-cooling structure. When the fan is working, the rotation of the impeller drives the air to flow to generate the Bernoulli effect, so that the air flow channel extracts the gas in the first accommodation space and at the same time takes away the heat generated inside the accommodation space due to the work of the drive assembly, achieving a heat dissipation effect, which can effectively extend the continuous working time, reduce the risk of overheating, and at the same time can effectively prevent water droplets from entering the interior of the fan, playing a good waterproof effect.

Claims

1. A waterproof fan with a self-cooling system, characterized in that: include: A stator impeller (1), a waterproof housing (2) and a back cover (3), wherein the stator impeller (1), the waterproof housing (2) and the back cover (3) are connected in sequence to form a first accommodating space; A drive assembly (4), wherein the drive assembly (4) is arranged in the first accommodating space; An air guide cover (5), wherein the air guide cover (5) is arranged on a side of the stator impeller (1) away from the driving assembly (4); A moving impeller (6), wherein the moving impeller (6) is arranged in the air guide cover (5), and the power output end of the driving component (4) passes through the fixed impeller (1) and is connected to the moving impeller (6) to transmit power; The air guide cover (5) comprises an inner cover body (51) and an outer cover body (52) arranged outside the inner cover body (51); a gap (53) is provided between the inner cover body (51) and the outer cover body (52) for allowing airflow to pass through; the stator (1) is provided with a stepped side wall for clamping the inner cover body (51) and the outer cover body (52); the stepped side wall has a large diameter portion (11) and a small diameter portion (12); the bottom end of the inner cover body (51) is clamped on the small diameter portion (12); The outer cover (52) is provided with a first ventilation hole (13) at a position corresponding to the first ventilation hole (13) for allowing air flow to be introduced into the gap (53) between the inner cover (51) and the outer cover (52), and the end surface of the rear cover (3) is provided with a second ventilation hole (31).

2. The waterproof fan with a self-cooling system according to claim 1, characterized in that: The fixed impeller (1) further comprises: an inner supporting cylinder (14), an outer supporting cylinder (15) and a plurality of guide vanes (16) arranged between the inner supporting cylinder (14) and the outer supporting cylinder (15); the outer supporting cylinder (15) has the stepped side wall; the first ventilation hole (13) is arranged in at least one guide vane (16) and transversely penetrates the inner supporting cylinder (14), the outer supporting cylinder (15) and the guide vane (16); the plurality of guide vanes (16) are arranged in a circular array with the axis of the inner supporting cylinder (14) as the center; and the inner supporting cylinder (14) is snap-connected to the waterproof housing (2).

3. The waterproof fan with a self-cooling system according to claim 1, characterized in that: The first ventilation hole (13) is provided with a flaring groove (111) on one side of the outer wall of the large diameter portion (11).

4. The waterproof fan with a self-cooling system according to claim 1, characterized in that: The large diameter portion (11) of the stator impeller (1) is provided with a positioning platform (112), and the outer cover (52) is provided with a positioning ventilation groove (521) at a position corresponding to the positioning platform (112).

5. The waterproof fan with a self-cooling system according to claim 1, characterized in that: A plurality of supporting ribs (522) are provided at the inner bending portion of the outer cover body (52).

6. The waterproof fan with a self-cooling system according to claim 1, characterized in that: A plurality of reflow grooves (523) are arranged inside the outer cover (52).

7. The waterproof fan with a self-cooling system according to claim 1, characterized in that: A plurality of air outlet slots (525) are provided on the inner side of the outer cover (52) near the air inlet (524).

8. The waterproof fan with a self-cooling system according to claim 1, characterized in that: The outer surface of the waterproof housing (2) is an arc-shaped surface.

9. The waterproof fan with a self-cooling system according to claim 2, characterized in that: A process positioning groove (21) is provided on one side of the waterproof housing (2) connected to the stator impeller (1), and a positioning protrusion (17) cooperating with the process positioning groove (21) is provided on the outer wall of the inner support cylinder (14) of the stator impeller (1).

10. The waterproof fan with a self-cooling system according to claim 1, characterized in that: The connection between the stator (1), the waterproof casing (2) and the rear cover (3) is coated with sealing material.

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