Ventilating fan with waterproof function

Abstract

The utility model discloses a ventilating fan with waterproof function, including upper casing and lower casing, upper casing and lower casing are connected, upper casing and lower casing are through, be equipped with the fan blade in the upper casing, be equipped with the motor in the lower casing, be connected through motor pivot between the motor and the fan blade, be equipped with the inner casing in the lower casing, and the motor is placed in the inner casing, the upper end mounting of inner casing has the support, the fan blade fixed cover is installed in the fan blade, and the motor pivot passes through the middle part of fan blade and is screwed on the fan blade fixed cover, and the waterproof rubber pad is established between the inner casing and the support. The structure is through setting up independent inner casing to accommodate the motor in the lower casing, and cooperates the waterproof rubber pad between the support and the inner casing, forms double sealed barrier. In addition, effectively blocks the invasion of external moisture and condensate into the motor cavity, avoids the stator winding short circuit, the pivot rust and prolongs the motor life.

Description

Technical Field

[0001] This utility model relates to the field of ventilation fan technology, and in particular to a waterproof ventilation fan. Background Technology

[0002] Exhaust fans, as key devices for indoor air circulation, are widely used in high-humidity environments such as kitchens and bathrooms. However, traditional exhaust fans have significant shortcomings in waterproofing: 1. The motor is usually directly exposed inside the lower housing. When moisture or condensation seeps in, it can easily lead to short circuits in the motor windings, corrosion of the shaft, and even the risk of electrical leakage. In particular, the gaps created by long-term operation where the motor shaft passes through the housing become the main pathway for moisture penetration.

[0003] 2. In some ventilation fans with integrated circuit functions, the circuit board is often directly fixed inside the housing cavity, relying solely on the gaps in the housing for sealing. In high humidity environments, moisture can easily penetrate through the light-transmitting openings or interface gaps, causing corrosion and damage to the circuit board.

[0004] Third, the housing connections mostly use rigid clips or bolts for fixing, lacking an elastic sealing design. Under temperature changes or vibration conditions, micro-gaps can easily form at the connection points, allowing moisture to seep in from the external environment or the side of the wall. Although existing technologies attempt to improve waterproofing through surface coatings or outer covers, they do not fundamentally solve the problems of motor cavity sealing, independent circuit protection, and dynamic structural waterproofing, thus limiting the product's reliability and lifespan in extremely humid environments. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a waterproof ventilation fan that achieves high integration, noise reduction, and a sealed waterproof function.

[0006] This utility model also provides a waterproof ventilation fan, including an upper shell and a lower shell, which are connected and communicate with each other. The upper shell contains a fan blade, and the lower shell contains a motor. The motor and the fan blade are connected by a motor shaft. The lower shell contains an inner shell, and the motor is placed inside the inner shell. A bracket is installed at the upper end of the inner shell. A fan blade fixing cover is installed on the fan blade. The motor shaft passes through the middle of the fan blade and is screwed to the fan blade fixing cover. A waterproof gasket is provided between the inner shell and the bracket.

[0007] Specifically, the motor includes a stator and a motor housing, the stator is located inside the motor housing, the motor shaft is located inside the stator, an electrical control mounting ring is provided above the stator, and a control circuit is provided inside the electrical control mounting ring.

[0008] Specifically, the bottom surface of the upper housing is provided with a mounting cavity, the surface of the upper housing is provided with a light-transmitting opening, a light-transmitting plate is installed in the light-transmitting opening, a circuit board base is installed in the mounting cavity, and a circuit board with light-emitting diodes is provided in the circuit board base, with the light-emitting diodes corresponding to the light-transmitting opening.

[0009] Specifically, the inner shell and the bracket are connected by a screw.

[0010] Furthermore, at least one hinge is also hinged inside the lower housing.

[0011] Specifically, a bearing is installed on the bracket, and the motor shaft passes through the bearing.

[0012] Furthermore, the electrical control mounting ring is filled with an epoxy resin sealing layer.

[0013] This utility model significantly improves the reliability of ventilation fans in humid environments through innovative structural design, specifically in the following ways: 1. By setting up an independent inner casing within the lower casing to house the motor, and using a waterproof gasket between the bracket and the inner casing, a double sealing barrier is formed. This effectively prevents external moisture and condensation from entering the motor cavity, avoiding stator winding short circuits, shaft corrosion, and extending motor life.

[0014] 2. The design combines a light-transmitting plate with a circuit board base to seal the circuit board containing LEDs within the mounting cavity; the light-transmitting opening achieves physical isolation, eliminating the path for moisture to corrode the circuit board through the light-transmitting gaps, thus reducing the circuit failure rate.

[0015] Third, the inner casing blocks the transmission of motor vibration to the main casing, thereby reducing noise.

[0016] Fourth, the control circuit is integrated into the electrical control mounting ring. The control circuit is electrically connected to the motor. The electrical control mounting ring is filled with an epoxy resin layer for further sealing. In addition, the control circuit and the electrical control mounting ring are set inside the motor, achieving a highly integrated function. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 of Figure 2 Another structural diagram from another angle.

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 4 This is a schematic diagram of the bi-angle structure of this utility model.

[0022] As shown in the attached diagram, the components are labeled as follows: 1. Fan blade fixing cover; 2. Fan blade; 3. Bracket; 4. Upper housing; 401. Mounting cavity; 5. Electrical control mounting ring; 6. Light-transmitting plate; 601. Circuit board; 602. Circuit board base; 603. Light-transmitting opening; 7. Waterproof gasket; 8. Stator; 801. Motor shaft; 802. Motor housing; 9. Shaft; 10. Hinge; 11. Lower housing; 11. Inner housing; 1101. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] The following is for reference. Figures 1 to 4 This invention describes a waterproof ventilation fan according to an embodiment of the present invention, comprising an upper housing 4 and a lower housing 11, which are connected and interconnected. The upper housing 4 houses a fan blade 2, and the lower housing 11 houses a motor. The motor and fan blade 2 are connected via a motor shaft 801. An inner housing 1101 is located within the lower housing 11, and the motor is housed within the inner housing 1101. A bracket 3 is mounted on the upper end of the inner housing 1101. A fan blade fixing cover 1 is mounted on the fan blade 2. The motor shaft 801 passes through the middle of the fan blade 2 and is screwed onto the fan blade fixing cover 1. A waterproof gasket 7 is provided between the inner housing 1101 and the bracket 3. This structure forms a double sealing barrier by providing an independent inner housing 1101 within the lower housing 11 to accommodate the motor, and by using the waterproof gasket 7 between the bracket 3 and the inner housing 1101. In addition, it effectively blocks external moisture and condensate from entering the motor cavity, preventing stator winding short circuits, shaft corrosion, and extending motor life.

[0025] Further explanation of the above scheme: The ventilation fan includes an upper housing 4 and a lower housing 11 that are interconnected. A cylindrical inner housing 1101 is fixed inside the lower housing 11. The lower housing 11 and the cylindrical inner housing 1101 are integrally formed, and the motor is entirely housed within the inner housing 1101. The upper end of the inner housing 1101 is connected to a bracket 3 via four screws. A waterproof gasket 7, made of silicone rubber and 1.5mm thick, is pressed onto the mating surface of the two. The fan blade 2 is locked to the top of the motor shaft 801 via a fan blade fixing cover 1. The motor shaft 801 passes through the central hole of the fan blade 2 and is secured to the fan blade fixing cover 1 via threads.

[0026] The waterproof gasket 7 must completely cover the contact ring surface between the bracket 3 and the inner shell 1101.

[0027] The motor described in this structure includes a stator 8 and a motor housing 802. The stator 8 is located inside the motor housing 802, and the motor shaft 801 is located inside the stator 8. An electrical control mounting ring 5 is provided above the stator 8, and a control circuit is located inside the electrical control mounting ring 5. (Refer to...) Figure 3 The motor includes: a stator 8 fixed inside a motor housing 802; a motor shaft 801 passing through the center of the stator 8, with its upper part passing through a bearing 9 of a bracket 3; and an electrical control mounting ring 5 fitted onto the top of the stator 8, with a control circuit board embedded inside. The circuit board is connected to an external power source via wires. The bearing 9 supports the motor shaft 801 to reduce radial vibration, and the electrical control mounting ring 5 provides physical isolation between the circuit and the motor.

[0028] The upper housing 4 of this structure has a mounting cavity 401 on its bottom surface and a light-transmitting opening on its surface. A light-transmitting plate 6 is mounted on the light-transmitting opening. A circuit board base 602 is mounted inside the mounting cavity 401, and a circuit board 601 with a light-emitting diode (LED) is mounted inside the circuit board base 602, with the LED corresponding to the light-transmitting opening. The bottom surface of the upper housing 4 has a rectangular mounting cavity 401 with a circular light-transmitting opening on its surface. The light-transmitting plate 6 is made of PC light-transmitting material and is sealed to the edge of the light-transmitting opening by ultrasonic welding. The circuit board base 602 is fixed inside the mounting cavity 401, and the circuit board 601 with an LED is embedded in the base, with the LED facing the center of the light-transmitting opening.

[0029] The inner housing 1101 and the bracket 3 of this structure are connected by a screw. At least one hinge 10 is also hinged inside the lower housing 11 of this structure. A bearing 9 is mounted on the bracket 3 of this structure, through which the motor shaft 801 passes. A waterproof adhesive layer (not shown) is applied to the joint between the light-transmitting plate 6 and the mounting cavity 401 to prevent moisture from entering along the gaps.

[0030] like Figure 1 and Figure 2 As shown, two hinges 10 are hinged to the side wall of the lower housing 11, and the hinges 10 can be opened and closed from 0° to 90° through a rotating shaft.

[0031] After the power is turned on, the circuit inside the electrical control mounting ring 5 drives the motor to run, and the motor shaft 801 drives the fan blade 2 to rotate to achieve exhaust. At the same time, the LED light source of the circuit board 601 provides illumination to the outside through the light-transmitting plate 6.

[0032] The electrical control mounting ring 5 in this structure is filled with an epoxy resin sealing layer to improve sealing performance.

[0033] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A waterproof ventilation fan, comprising an upper housing (4) and a lower housing (11), the upper housing (4) and the lower housing (11) being connected and communicating with each other, a fan blade (2) being provided inside the upper housing (4), and a motor being provided inside the lower housing (11), the motor being connected to the fan blade (2) via a motor shaft (801), characterized in that, The lower housing (11) is provided with an inner housing (1101), the motor is placed inside the inner housing (1101), the upper end of the inner housing (1101) is equipped with a bracket (3), the fan blade fixing cover (1) is installed on the fan blade (2), the motor shaft (801) passes through the middle of the fan blade (2) and the motor shaft (801) is screwed onto the fan blade fixing cover (1), and a waterproof gasket (7) is provided between the inner housing (1101) and the bracket (3).

2. A waterproof ventilation fan according to claim 1, characterized in that: The motor includes a stator (8) and a motor housing (802). The stator (8) is located inside the motor housing (802). The motor shaft (801) is located inside the stator (8). An electrical control mounting ring (5) is provided above the stator (8). A control circuit is provided inside the electrical control mounting ring (5).

3. A waterproof ventilation fan according to claim 1, characterized in that: The bottom surface of the upper housing (4) is provided with a mounting cavity (401), and the surface of the upper housing (4) is provided with a light-transmitting opening (603). A light-transmitting plate (6) is installed in the light-transmitting opening. A circuit board base (602) is installed in the mounting cavity (401). A circuit board (601) with a light-emitting diode is provided in the circuit board base (602). The light-emitting diode is located at the light-transmitting opening (603).

4. A waterproof ventilation fan according to claim 1, characterized in that: The inner shell (1101) is connected to the bracket (3) via a screw.

5. A waterproof ventilation fan according to claim 1, characterized in that: At least one hinge (10) is also hinged inside the lower housing (11).

6. A waterproof ventilation fan according to claim 1, characterized in that: A bearing (9) is mounted on the bracket (3), through which the motor shaft (801) passes.

7. A waterproof ventilation fan according to claim 2, characterized in that: The electrical control mounting ring (5) is filled with an epoxy resin sealing layer.

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