Heat dissipation structure of dry and wet dual-purpose fan
By incorporating heat dissipation fins and air guide holes into the dry and wet dual-purpose fan, moisture is isolated, solving the problems of poor heat dissipation and corrosion. This achieves a low-cost, low-noise fan design and extends its service life.
Patent Information
- Application Number
- CN202423069375.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-12
AI Technical Summary
The existing heat dissipation structure of dry and wet dual-purpose fans has the problem of poor heat dissipation, and water vapor entering the motor drive cavity causes corrosion, affecting service life.
A heat dissipation structure for a dual-purpose dry and wet fan was designed. By setting heat dissipation fins and air guide holes on the outer wall of the casing, heat is conducted by airflow. The stator assembly is interference-fitted with the inner wall of the casing to isolate moisture and achieve a waterproof effect. The distributed winding and aluminum shell are combined to reduce heat generation.
This effectively prevents moisture from entering the motor, extends the service life of the fan, reduces noise and vibration, and lowers costs.
Smart Images
Figure CN223511191U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to motor technical field, concretely is a dry and wet dual-purpose fan's heat radiation structure. BACKGROUND
[0002] The heat generated by the fan during operation mainly comes from the stator winding and the driver. Currently, in order to solve the problem of poor heat dissipation, a heat dissipation fan blade or negative pressure air suction is added to the electric fan. The installation of an independent heat dissipation fan blade requires additional power consumption and increases the noise of the motor during operation. A rubber sleeve is added outside the fan cover to form an air flow channel. The negative pressure generated by the high-speed rotation of the impeller at the inlet sucks external air into the fan interior through the inlet, providing heat dissipation for the drive and motor.
[0003] When applied in water absorption and dust absorption equipment, the fan is installed in a closed cavity. The main airflow sucked by the moving impeller contains water vapor. Since the motor drive cavity is connected to the impeller inlet, the water vapor in the impeller cavity will enter the motor drive cavity when the fan stops working. Over time, it will gradually corrode the bearings, enameled wire, and drive, affecting the service life and installation of the fan. SUMMARY
[0004] The utility model provides a dry and wet dual-purpose fan's heat radiation structure to effectively prevent dust and water vapor in the air duct from entering the motor interior space and prolong the service life of the dry and wet dual-purpose fan.
[0005] The utility model adopts the technical scheme that a dry and wet dual-purpose fan's heat radiation structure includes a shell, the one end of shell installs the front end cover, installs the back end cover in the other end, the front end cover installs the fan cover, installs the moving impeller in the fan cover, the air inlet of fan cover and the air inlet of moving impeller correspond to set up, the side of fan cover is made with the air outlet; The upper surface of the front end cover is provided with a guide hole for airflow; The outer wall of the shell is provided with a row of heat dissipation fins, and the inner wall of the shell is provided with a stator assembly and a rotor assembly.
[0006] To optimize the above technical solution, the utility model further includes the following improved technical solutions.
[0007] The channels for airflow passing through are formed between the heat dissipation fins on the outer wall of the shell, and the stator assembly is in interference fit with the inner wall of the shell.
[0008] The lower surface of the front end cover is provided with a plurality of spiral guide air ducts.
[0009] The first bearing is installed at the center of the front end cover, the second bearing is installed at the center of the back end cover, and the two ends of the motor shaft are matched with the first bearing and the second bearing, respectively.
[0010] Compared with the prior art, the heat dissipation structure of the dry and wet dual-purpose fan of the utility model realizes the waterproof effect of dry and wet dual-purpose by isolating the airflow with water vapor from the stator assembly, and the heat conducted from the stator assembly to the casing is dissipated through the airflow flowing through the front end cover, so that the overall structure is simple and the cost is reduced compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 is the sectional view of the embodiment.
[0012] Figure 2 is the explosion view of the embodiment. DETAILED DESCRIPTION
[0013] The embodiment of the utility model is further described in detail below in combination with the drawings.
[0014] Figure 1 and Figure 2 As shown in the structural schematic view of the utility model.
[0015] The reference signs therein are: front end cover 1, flow guide air duct 1a, flow guide hole 1b, casing 2, heat dissipation fin 2a, motor shaft 3, first bearing 4, fan cover 5, air inlet 5a, air outlet 5b, moving impeller 6, air suction port 6a, rear end cover 7, second bearing 8, wave-shaped gasket 9, stator assembly 10, rotor assembly 11, dynamic balancing block 12, framework 13, internal wiring board 14.
[0016] As shown in the structural schematic view of the utility model, Figure 1 The heat dissipation structure of the dry and wet dual-purpose fan of the utility model comprises front end cover 1 and casing 2, the motor shaft 3 is rotatably installed in the casing 2, and the lower end of the motor shaft 3 is rotatably connected to the front end cover 1 through the first bearing 4. The fan cover 5 is installed at the lower end of the front end cover 1, the moving impeller 6 is installed in the fan cover 5, the moving impeller 6 is installed on the motor shaft, the lower end of the fan cover 5 is provided with the air inlet 5a, the lower end of the moving impeller 6 is provided with the air suction port 6a, the air inlet 5a and the air suction port 6a are correspondingly arranged, and the side of the fan cover 5 is provided with the air outlet 5b.
[0017] When the motor works, the airflow enters the air suction port 6a of the moving impeller 6 through the air inlet 5a of the fan cover 5, the moving impeller 6 rotates to discharge part of the airflow through the air outlet 5b of the fan cover 5, and the other part of the airflow continues to flow to the front end cover 1.
[0018] The lower surface of the front end cover 1 is provided with a plurality of spiral flow guide air ducts 1a, the upper surface of the front end cover 1 is provided with the flow guide hole 1b for the airflow to pass through, and the casing 2 is installed at the upper end of the front end cover 1. Part of the airflow flowing out of the fan blade flows in the direction of the flow guide air duct 1a, and the airflow flows out of the flow guide hole 1b and flows radially to the outside of the casing 2.
[0019] The outer wall of the casing 2 is provided with a plurality of heat dissipation fins 2a, and the heat dissipation fins 2a are arranged alternately to form a channel for air flow.
[0020] The casing 2 is internally provided with a stator assembly 10 and a rotor assembly 11, the rotor assembly 11 is fixedly installed on the motor shaft 3, and the upper end of the rotor assembly 11 is provided with a dynamic balance block 12, so that the rotor assembly 11 does not vibrate obviously during rotation.
[0021] The heat generated by the motor during operation is conducted to the aluminum casing 2 through the stator assembly 10 for heat dissipation, and the air flow flowing through the front end cover 1 continues to flow to the channel formed by the heat dissipation fins 2a of the outer wall of the casing 2, thereby further assisting the motor to dissipate heat, thereby solving the heat dissipation problem of the motor.
[0022] The motor cavity and the dynamic impeller 6 cavity are completely isolated, the water vapor entering the dynamic impeller 6 does not enter the motor cavity, and the service life and safety problem of the motor enameled wire and bearing caused by long-time water vapor corrosion in the application of water suction and dust suction equipment are solved.
[0023] In addition, in the motor design, considering the low pressure and large current application condition of the fan, the distributed winding is adopted, and the diameter of the enameled wire is increased to reduce the current density and further reduce the heating of the winding.
[0024] The driver is installed in the aluminum shell, and the front and rear covers and the sealing gasket ensure the sealing of the inside of the driver. In this way, the driver and the fan can be installed in the same environment, and the customer does not need to provide additional installation environment for the driver, which is suitable for more installation environments.
[0025] The best embodiment of the utility model has been illustrated, and various changes or modifications made by those skilled in the art will not deviate from the scope of the utility model.
Claims
1. A heat dissipating structure of a dry / wet dual-purpose fan, comprising a casing (2), a front end cover (1) being mounted at one end of the casing (2), and a rear end cover (7) being mounted at the other end of the casing (2), characterized in that: The front end cover (1) is provided with a wind cover (5), and a dynamic vane wheel (6) is arranged in the wind cover (5); the air inlet (5a) of the wind cover (5) is arranged in correspondence with the air suction port (6a) of the dynamic vane wheel (6); the side edge of the wind cover (5) is provided with an air outlet (5b); the upper surface of the front end cover (1) is provided with a flow guide hole (1b) for air flow; the upper end of the front end cover (1) is provided with a machine shell (2); the outer wall of the machine shell (2) is provided with a row of heat dissipation fins (2a); and the machine shell (2) is provided with a stator assembly (10) and a rotor assembly (11).
2. The heat dissipation structure of a wet and dry dual-purpose fan according to claim 1, characterized in that: The heat dissipation fins (2a) on the outer wall of the machine shell (2) are arranged in pairs to form a channel for air flow; and the stator assembly (10) is in interference fit with the inner wall of the machine shell (2).
3. The heat dissipation structure of a wet and dry dual-purpose fan according to claim 2, characterized in that: The lower surface of the front end cover (1) is provided with a plurality of spiral flow guide air ducts (1a).
4. The heat dissipation structure of a wet and dry dual-purpose fan according to claim 3, characterized in that: The center of the front end cover (1) is provided with a first bearing (4), the center of the rear end cover (7) is provided with a second bearing (8), and the two ends of the motor shaft (3) are respectively matched with the first bearing (4) and the second bearing (8).