A heat dissipation structure of a water pump

Abstract

The present invention discloses a heat dissipation structure for a water pump, which aims to solve the problem of poor heat dissipation effect at the front end of the water pump motor. The invention includes a water pump comprising a pump body, a motor, and a rotating shaft. The heat dissipation structure includes: a water droplet drainage pipe for draining water to form water droplets; a water retaining plate installed on the rotating shaft to block water flow along the rotating shaft to the front end of the motor; and a fan blade installed on the water retaining plate. The fan blade rotates with the rotating shaft and blows air toward the front end of the motor. Water droplets dripping from the water droplet drainage pipe are broken up by the fan blade and blown toward the front end of the motor along with the air flow. The heat dissipation structure of the water pump of the present patent application improves the heat dissipation effect of the front end of the motor on the water pump, thereby ensuring the performance of the water pump.

Description

Technical Field

[0001] The present invention relates to a water pump technology, and more particularly to a heat dissipation structure of a water pump. Background Art

[0002] Currently, common water pumps consist of two parts: the motor and the pump body. When the pump is running, the front and rear windings of the motor generate heat, making these two parts the hottest. Most water pumps use rotating fan blades in the rear half of the motor for air cooling. Therefore, the front windings typically run 10 to 20 degrees Celsius hotter than the rear windings. The front bearing, surrounded by the front windings, also runs more than 10 degrees Celsius hotter than the rear bearings. This is particularly problematic with custom-made motors, where cost considerations limit the space within the housing and end caps, and the motor design has tight margins. To prevent water leaking from the pump body from entering the motor through the shaft, a water retaining ring is installed at the front of the motor to block any leaking water, protecting the motor. However, the lack of a heat dissipation structure at the front of the motor results in high temperatures in the front windings, impacting pump performance. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a heat dissipation structure of a water pump, which improves the heat dissipation effect of the front part of the motor on the water pump and ensures the performance of the water pump.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a heat dissipation structure of a water pump, the water pump includes a pump body, a motor, and a rotating shaft, and the heat dissipation structure includes:

[0005] A water droplet drainage tube, used for draining water to form water droplets;

[0006] A water retaining plate is installed on the rotating shaft to prevent water from flowing along the rotating shaft to the front end of the motor;

[0007] The fan blades are installed on the water retaining plate. The fan blades rotate with the rotating shaft and blow air toward the front end of the motor. The water droplets dripping from the water droplet drainage pipe are broken up by the fan blades and blown toward the front end of the motor along with the air flow.

[0008] When the water pump is operating, the shaft rotates, and the water retaining plate blocks the flow of water from the pump body to the motor, preventing water leaking from the pump body from entering the motor through the shaft. The fan blades mounted on the water retaining plate rotate with the shaft, breaking up water droplets dripping from the water droplet drainage pipe and blowing them toward the front end of the motor with the airflow, thereby achieving heat dissipation at the front end of the motor. The airflow and water mist act together on the front end of the motor, greatly improving the heat dissipation effect at the front end of the motor. The water pump heat dissipation structure of this patent application improves the heat dissipation effect at the front end of the water pump motor, ensuring the performance of the water pump.

[0009] Preferably, a front end cover is provided at the front end of the motor, a mounting groove for mounting the rotating shaft is provided on the front end cover, and the outer edge contour of the water retaining plate radially exceeds the outer edge contour of the mounting groove.

[0010] The front cover is provided with a mounting groove to facilitate the installation of the rotating shaft. The outline size of the water retaining plate is larger than the outline size of the mounting groove to prevent water mist from scattering into the mounting groove and entering the motor.

[0011] Preferably, a sealing ring is installed between the mounting groove and the rotating shaft.

[0012] The sealing ring plays a role in waterproofing and dustproofing.

[0013] Preferably, a convex ring is provided on the edge of the mounting groove on the front end cover, and a drainage ring groove is provided on the outer wall of the convex ring.

[0014] The water remaining on the front cover flows downward under the action of gravity and flows into the drainage ring groove and finally drips down to prevent the water from entering the installation groove.

[0015] Preferably, a connecting sleeve extending toward the pump body is provided on the water retaining plate, the connecting sleeve is tightly connected to the rotating shaft, the root of the fan blade is arranged on the connecting sleeve, and the outer end of the fan blade extends out of the outer edge of the water retaining plate.

[0016] The setting of the connecting sleeve improves the connection strength between the water retaining plate and the rotating shaft, making the connection of the fan blade more reliable. The outer end of the fan blade extends beyond the outer edge of the water retaining plate, ensuring that the fan blade can blow air toward the front end of the motor.

[0017] Preferably, drainage holes are provided between the inner edge of the water retaining plate and the fan blades, and between the outer edge of the water retaining plate and the fan blades.

[0018] The setting of the drainage hole facilitates the flow of water on the water retaining plate toward the surface of the pump body. After the water pump is stopped, the water remaining on the water retaining plate can flow downward quickly.

[0019] Another solution is that an extension ring extending toward the pump body is provided on the edge of the mounting groove on the front end cover, a diversion ring groove is provided on the outer wall of the extension ring near the water retaining plate, a guide sleeve extending toward the motor is provided on the water retaining plate, the side wall of the guide sleeve is radially inclined outward toward the motor, and the end of the extension ring is placed in the guide sleeve.

[0020] As the impellers slap water droplets onto the front cover, they form a mist that flows with the airflow. Because the end of the extension ring is located within the guide sleeve, it's difficult for airflow to enter the mounting slot, achieving a strong waterproofing effect. Water flowing from the front cover flows into the guide ring groove under the action of gravity and drips onto the inner wall of the guide sleeve. The inner wall of the guide sleeve is tilted, and as the water deflector rotates, the water flowing on the inner wall of the guide sleeve is thrown outward onto the front cover, providing secondary heat dissipation for the front cover.

[0021] In the first solution, a water outlet is provided on the pump body, one end of the water drip drainage pipe is connected to the water outlet, the other end of the water drip drainage pipe is placed above the fan blade, and an electromagnetic valve is installed on the water drip drainage pipe. When the motor is powered on and rotated, the electromagnetic valve is started to make the water drip drainage pipe conductive.

[0022] The solenoid valve and the water pump work or stop synchronously. When the water pump is working, the solenoid valve opens, the water drip drainage pipe is connected, and the water flow at the water outlet of the pump body is introduced into the water drip drainage pipe. The opening amount of the solenoid valve is small, so that the water flows to the lower end of the water drip drainage pipe to form water droplets, and drips onto the fan blades.

[0023] The second option is that a water outlet is provided on the pump body, one end of the water drip drainage tube is connected to the water outlet, and the other end of the water drip drainage tube is placed above the fan blade. A pressure-resistant permeable membrane is installed in the water drip drainage tube. After water is discharged from the working water outlet of the pump body, water seeps out of the permeable membrane, flows along the water drip drainage tube and drips onto the fan blade.

[0024] When the pump is running, the water pressure at the outlet increases, exceeding the carrying capacity of the permeable membrane. Water seeps through the membrane and flows out of the lower end of the drip drainage tube, dripping onto the fan blades. When the pump stops, the water pressure at the outlet is lower than the carrying capacity of the permeable membrane, and no water flows in the drip drainage tube.

[0025] The third solution is to provide a plurality of water drop drainage pipes, and the lower ends of the plurality of water drop drainage pipes are arranged at intervals along a direction perpendicular to the axis of the rotating shaft. A water outlet is provided on the pump body, and a drainage branch pipe connected to the water outlet is connected to the pump body, and an electromagnetic valve is installed on the drainage branch pipe, and the drainage branch pipe is connected to a diversion mechanism; the diversion mechanism includes a water collecting cylinder, a rotating column, and a diversion seat. The rotating column is rotatably installed in the water collecting cylinder, a turntable is provided at the lower end of the rotating column, and a plurality of rotating blades are installed on the rotating column. The water flow ejected from the drainage branch pipe hits the rotating blades to drive the rotating column to operate, the diversion seat is connected to the lower end of the water collecting cylinder, and the turntable is attached to the diversion seat. A plurality of drainage holes are provided at intervals circumferentially on the diversion seat, and the upper ends of the water drop drainage pipes are connected to the drainage holes one by one; an annular guide groove is provided at the edge of the upper surface of the turntable, the bottom surface of the guide groove is inclined, and an outlet hole is provided at the lowest point of the bottom surface of the guide groove, and the outlet hole can be aligned with any water hole.

[0026] The solenoid valve and water pump operate synchronously or shut down. When the water pump is operating, the solenoid valve opens, connecting the drainage branch pipe. Water ejected from the drainage branch pipe impacts the rotating blades, driving the rotating column. The ejected water falls onto the turntable and is channeled into the diversion groove, along which it flows to the outlet holes. As the turntable rotates, the outlet holes sequentially connect to different water holes along the circumference, dripping water droplets onto the fan blades at different positions perpendicular to the axis of the rotating shaft. This helps to expand the dispersion of the water mist and achieve more uniform heat dissipation from the front end of the motor.

[0027] Compared with the prior art, the present invention has the following beneficial effects: (1) the heat dissipation structure of the water pump improves the heat dissipation effect of the front part of the motor on the water pump, thereby ensuring the performance of the water pump; (2) during the process of dual heat dissipation of the front part of the water pump by air flow and water mist, water will not enter the front part of the motor, thereby avoiding malfunction caused by water entering the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a structural principle diagram of the present invention;

[0030] Figure 3 is a cross-sectional view of Example 1 of the present invention;

[0031] Figure 4 is a cross-sectional view of Example 2 of the present invention;

[0032] Figure 5 Schematic diagram of the water drip drainage pipe connection structure of embodiment 5 and embodiment 6 of the present invention;

[0033] In the figure: 1. pump body, 2. motor, 3. rotating shaft, 4. water drop drainage pipe, 5. water retaining plate, 6. fan blade, 7. front cover, 8. rear cover, 9. heat dissipation blade, 10. mounting groove, 11. sealing ring, 12. front bearing, 13. rear bearing, 14. connecting plate, 15. convex ring, 16. drainage ring groove, 17. connecting sleeve, 18. drainage hole, 19. water inlet, 20. water outlet, 21. solenoid valve, 22. extension ring, 23. guide sleeve, 24. fixing seat, 25. drainage branch pipe, 26. water collecting cylinder, 27. rotating column, 28. diversion seat, 29. turntable, 30. rotating blade, 31. downhole, 32. guide groove, 33. outflow hole. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0035] Example 1: A heat dissipation structure of a water pump (see attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 ), the water pump includes a pump body 1, a motor 2, a rotating shaft 3, and a heat dissipation structure including:

[0036] A water droplet drainage tube 4, used for draining water to form water droplets;

[0037] The water retaining plate 5 is installed on the rotating shaft to prevent water from flowing along the rotating shaft to the front end of the motor;

[0038] The fan blades 6 are mounted on the surface of the water retaining plate facing the pump body. The fan blades rotate with the shaft and blow air toward the front end of the motor. The water droplets dripping from the water droplet drainage pipe are scattered by the fan blades and blown toward the front end of the motor along with the air flow. There are eight fan blades evenly distributed.

[0039] A front cover 7 is provided at the front end of the motor, a rear cover 8 is provided at the rear end of the motor, a rear end cover extends from the rear end of the rotating shaft, and a heat dissipation blade 9 is installed at the rear end of the rotating shaft, and the heat dissipation blade blows air toward the rear end cover to dissipate heat. A mounting groove 10 for mounting the rotating shaft is provided on the front cover, and the outer edge contour of the water retaining plate radially exceeds the outer edge contour of the mounting groove. A sealing ring 11 is installed between the mounting groove and the rotating shaft. A front bearing 12 is installed between the front cover and the rotating shaft, and a rear bearing 13 is installed between the rear end cover and the rotating shaft. A connecting plate 14 is provided on the front cover, and the connecting plate and the front cover are connected by a number of connecting ribs, which are parallel to the rotating shaft. The connecting plate is tightly connected to the pump body, and the water retaining plate and the fan blades are provided between the front cover and the connecting plate.

[0040] A raised ring 15 is located on the edge of the mounting groove on the front cover, and a drainage ring groove 16 is located on its outer wall. The water retaining plate is equipped with a connecting sleeve 17 that extends toward the pump body and is tightly connected to the rotating shaft. The roots of the fan blades are mounted on the connecting sleeve, and the outer ends of the fan blades extend beyond the outer edge of the water retaining plate. Drainage holes 18 are located between the inner edge of the water retaining plate and the fan blades, as well as between the outer edge of the water retaining plate and the fan blades.

[0041] A water inlet 19 and a water outlet 20 are provided on the pump body. One end of the water droplet drainage pipe is connected to the water outlet, and the other end of the water droplet drainage pipe is placed above the fan blade. An electromagnetic valve 21 is installed on the water droplet drainage pipe. When the motor is powered on and rotated, the electromagnetic valve is started to make the water droplet drainage pipe conductive.

[0042] When the water pump is operating, the shaft rotates, and the water retaining plate blocks the flow of water from the pump body to the motor side, preventing water leaking from the pump body from entering the motor through the shaft. The fan blades installed on the water retaining plate rotate with the shaft, and the water droplets dripping from the water dripping pipe are scattered by the fan blades and blown toward the front end of the motor with the air flow, thereby achieving heat dissipation at the front end of the motor. The combined action of airflow and water mist on the front end of the motor greatly improves the heat dissipation effect at the front end of the motor.

[0043] Example 2: A heat dissipation structure of a water pump (see attached Figure 4), its structure is similar to that of Example 1, the main difference being that in this embodiment, an extension ring 22 is provided at the edge of the mounting groove on the front cover, extending toward the pump body. A diversion ring groove is provided on the outer wall of the extension ring near the water retaining plate. A guide sleeve 23 is provided on the water retaining plate, extending toward the motor. The sidewalls of the guide sleeve are tilted radially outward toward the motor, and the end of the extension ring is positioned within the guide sleeve. A slight gap is provided between the outer wall of the extension ring and the inner wall of the guide sleeve to prevent interference between the guide sleeve and the extension ring during rotation of the water retaining plate. When the fan blades bead water droplets onto the front cover, they form a mist that flows with the airflow. At this time, because the end of the extension ring is positioned within the guide sleeve, airflow is difficult to enter the mounting groove, achieving a good waterproofing effect. Water flowing on the front cover flows into the diversion ring groove under the action of gravity and drips onto the inner wall of the guide sleeve. Since the inner wall of the guide sleeve is tilted, water flowing on the inner wall of the guide sleeve is thrown outward onto the front cover during rotation of the water retaining plate, providing secondary heat dissipation for the front cover. The other structures are the same as those of Example 1.

[0044] Example 3: A heat dissipation structure for a water pump, similar in structure to Example 1, with the main difference being that in this embodiment, a water inlet and a water outlet are provided on the pump body, one end of a water drip drainage tube is connected to the water outlet, and the other end of the water drip drainage tube is placed above the fan blades. A pressure-resistant permeable membrane is installed in the water drip drainage tube. After water is discharged from the pump body's working outlet, water seeps out of the permeable membrane, flows along the water drip drainage tube, and drips onto the fan blades. When the water pump is operating, the water pressure at the water outlet increases, exceeding the carrying capacity of the permeable membrane. Water seeps out of the permeable membrane and flows out from the lower end of the water drip drainage tube, dripping onto the fan blades. When the water pump stops working, the water pressure at the water outlet is less than the carrying capacity of the permeable membrane, and no water flows in the water drip drainage tube. The other structures are the same as Example 1.

[0045] Example 4: A heat dissipation structure for a water pump, similar in structure to Example 2, with the main difference being that in this embodiment, a water inlet and a water outlet are provided on the pump body, one end of a water drip drainage tube is connected to the water outlet, and the other end of the water drip drainage tube is placed above the fan blades. A pressure-resistant permeable membrane is installed in the water drip drainage tube. After water flows out of the pump body's operating outlet, water seeps from the permeable membrane, flows along the water drip drainage tube, and drips onto the fan blades. When the water pump is operating, the water pressure at the water outlet increases, exceeding the carrying capacity of the permeable membrane. Water seeps from the permeable membrane and flows out from the lower end of the water drip drainage tube, dripping onto the fan blades. When the water pump stops operating, the water pressure at the water outlet is less than the carrying capacity of the permeable membrane, and no water flows in the water drip drainage tube. The other structures are the same as in Example 2.

[0046] Example 5: A heat dissipation structure of a water pump (see attached Figure 5), its structure is similar to that of Example 1, the main difference being that in this embodiment, a plurality of water drip drainage tubes are provided, the lower ends of which are spaced apart and arranged perpendicular to the axis of the rotating shaft. A fixing seat 24 is installed on the connecting rib of the front end cover, and the water drip drainage tubes are all fixed to the fixing seat. The pump body is provided with a water inlet and a water outlet, and a drainage branch pipe 25 connected to the water outlet is connected to the pump body. A solenoid valve is installed on the drainage branch pipe, and the drainage branch pipe is connected to a diversion mechanism; the diversion mechanism includes a water collecting barrel 26, a rotating column 27, and a diversion seat 28. The end of the drainage branch pipe is connected to the water collecting barrel, and the inner diameter of the connection end of the drainage branch pipe and the water collecting barrel gradually decreases as it approaches the water collecting barrel. The rotating column is rotatably installed in the water collecting barrel. A turntable 29 is provided at the lower end of the rotating column. A number of rotating blades 30 are installed on the rotating column. The water flow ejected from the drainage branch pipe impacts the rotating blades to drive the rotating column to operate. The diverter seat is connected to the lower end of the water collecting barrel. The turntable fits on the diverter seat. A number of drainage holes 31 are circumferentially spaced on the diverter seat. The drainage holes are evenly distributed circumferentially. The upper end of the water droplet drainage pipe is connected to the drainage holes one by one. An annular guide groove 32 is provided at the edge of the upper surface of the turntable. The bottom surface of the guide groove is inclined. An outlet hole 33 is provided at the lowest point of the bottom surface of the guide groove. The outlet hole can be aligned with any outlet hole. Both side walls of the guide groove are inclined and converged inward from top to bottom. The bottom surface of the guide groove is inclined from a position symmetrical to the outlet hole to the outlet hole in the circumferential direction on both sides. The lower part of the water collecting barrel is a truncated cone-shaped structure with a larger top and a smaller bottom. The diameter of the lower edge of the water collecting barrel is smaller than the diameter of the turntable. The water collecting barrel is installed on the front cover.

[0047] The solenoid valve and water pump operate or stop synchronously. When the water pump is operating, the solenoid valve opens, the drainage branch pipe is connected, and the water jetted from the drainage branch pipe impacts the rotating blades, driving the rotating column to operate. The jetted water falls onto the turntable and is drained into the guide groove, flowing along the guide groove to the outlet hole. As the turntable rotates, the outlet hole connects to different water holes in sequence along the circumference, dripping water droplets onto the fan blades at different positions perpendicular to the axis of the rotating shaft, which helps to expand the dispersion range of the water mist and make the heat dissipation at the front end of the motor more uniform. The other structures are the same as those in Example 1.

[0048] Example 6: A heat dissipation structure for a water pump, similar in structure to Example 2, differing primarily in that a plurality of water droplet drainage pipes are provided in this embodiment, the lower ends of which are spaced apart and arranged perpendicular to the axis of the rotating shaft. A fixing seat is mounted on the connecting rib of the front end cover, and the water droplet drainage pipes are fixed to the fixing seat. The pump body is provided with a water inlet and a water outlet, and a drainage branch pipe connected to the water outlet is connected to the pump body. A solenoid valve is mounted on the drainage branch pipe, and the drainage branch pipe is connected to a diversion mechanism; the diversion mechanism includes a water collection barrel, a rotating column, and a diversion seat. The end of the drainage branch pipe is connected to the water collection barrel, and the inner diameter of the connection end between the drainage branch pipe and the water collection barrel gradually decreases as it approaches the water collection barrel. A rotating column is rotatably mounted within the water collection tube. A turntable is located at its lower end, and several rotating blades are mounted on the column. Water ejected from the drainage branch impacts the rotating blades, driving the column. A diverter seat is connected to the lower end of the water collection tube, and the turntable fits onto the diverter seat. Several drainage holes are circumferentially spaced and evenly distributed around the circumference of the diverter seat. The upper ends of the water droplet drainage pipes are connected to the drainage holes in a one-to-one correspondence. An annular guide groove is provided at the edge of the upper surface of the turntable. The bottom of the guide groove is inclined, and an outlet hole is located at the lowest point of the bottom of the guide groove. The outlet hole can be aligned with any of the drainage holes. The two side walls of the guide groove are inclined and converge inward from top to bottom. The bottom of the guide groove is inclined from a position symmetrical to the outlet hole to the outlet hole in a circumferential direction on both sides. The lower portion of the water collection tube is a frustum-shaped structure that is larger at the top and smaller at the bottom. The diameter of the lower edge of the water collection tube is smaller than that of the turntable. The water collection tube is mounted on the front cover.

[0049] The solenoid valve and water pump operate or stop synchronously. When the water pump is operating, the solenoid valve opens, the drainage branch pipe is connected, and the water jetted from the drainage branch pipe impacts the rotating blades, driving the rotating column to operate. The jetted water falls onto the turntable and is drained into the guide groove, flowing along the guide groove to the outlet hole. As the turntable rotates, the outlet hole connects to different water holes in sequence along the circumference, dripping water droplets onto the fan blades at different positions perpendicular to the axis of the rotating shaft, which helps to expand the dispersion range of the water mist and make the heat dissipation at the front end of the motor more uniform. The other structures are the same as those in Example 2.

[0050] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A heat dissipation structure of a water pump, the water pump includes a pump body, a motor, and a rotating shaft, characterized in that: The heat dissipation structure includes: A water droplet drainage tube, used for draining water to form water droplets; A water retaining plate is installed on the rotating shaft to prevent water from flowing along the rotating shaft to the front end of the motor; The fan blades are installed on the water retaining plate. The fan blades rotate with the rotating shaft and blow air toward the front end of the motor. The water droplets dripping from the water droplet drainage pipe are broken up by the fan blades and blown toward the front end of the motor with the air flow; a front end cover is provided at the front end of the motor, and a mounting groove for mounting the rotating shaft is provided on the front end cover. The outer edge contour of the water retaining plate radially exceeds the outer edge contour of the mounting groove; a sealing ring is installed between the mounting groove and the rotating shaft; a connecting sleeve extending toward the pump body is provided on the water retaining plate, and the connecting sleeve is tightly connected to the rotating shaft. The root of the fan blade is provided on the connecting sleeve, and the outer end of the fan blade extends out of the outer edge of the water retaining plate; drainage holes are provided between the inner edge of the water retaining plate and the fan blade, as well as between the outer edge of the water retaining plate and the fan blade.

2. The heat dissipation structure of a water pump according to claim 1, characterized in that: A front bearing is installed between the front end cover and the rotating shaft, and a rear bearing is installed between the rear end cover and the rotating shaft.

3. The heat dissipation structure of a water pump according to claim 1, characterized in that: A connecting plate is provided on the front cover, and the connecting plate and the front cover are connected by a plurality of connecting ribs. The connecting ribs are parallel to the rotating shaft. The connecting plate is firmly connected to the pump body, and the water retaining plate and the fan blades are arranged between the front cover and the connecting plate.

4. The heat dissipation structure of a water pump according to claim 1, characterized in that: A convex ring is provided on the edge of the mounting groove on the front end cover, and a drainage ring groove is provided on the outer wall of the convex ring.

5. The heat dissipation structure of a water pump according to claim 1, characterized in that: An extension ring is provided on the edge of the mounting groove on the front end cover, extending toward the pump body. A diversion ring groove is provided on the outer wall of the extension ring near the water retaining plate. A guide sleeve is provided on the water retaining plate, extending toward the motor. The side wall of the guide sleeve is radially inclined outward toward the motor, and the end of the extension ring is placed in the guide sleeve.

6. A heat dissipation structure for a water pump according to any one of claims 1 to 5, characterized in that: A water outlet is provided on the pump body, one end of a water droplet drainage pipe is connected to the water outlet, the other end of the water droplet drainage pipe is placed above the fan blade, and a solenoid valve is installed on the water droplet drainage pipe. When the motor is energized and rotated, the solenoid valve is started to make the water droplet drainage pipe conductive.

7. A heat dissipation structure for a water pump according to any one of claims 1 to 5, characterized in that: A water outlet is provided on the pump body, one end of a water drip drainage pipe is connected to the water outlet, and the other end of the water drip drainage pipe is placed above the fan blade. A pressure-resistant permeable membrane is installed in the water drip drainage pipe. After water flows out of the working water outlet of the pump body, water seeps out of the permeable membrane, flows along the water drip drainage pipe and drips onto the fan blade.

8. The heat dissipation structure of a water pump according to any one of claims 1 to 5, characterized in that: A plurality of water drop drainage pipes are provided, and the lower ends of the plurality of water drop drainage pipes are arranged at intervals along a direction perpendicular to the axis of the rotating shaft. A water outlet is provided on the pump body, and a drainage branch pipe connected to the water outlet is connected to the pump body, and an electromagnetic valve is installed on the drainage branch pipe, and the drainage branch pipe is connected to a diversion mechanism; the diversion mechanism includes a water collecting barrel, a rotating column, and a diversion seat. The rotating column is rotatably installed in the water collecting barrel, a turntable is provided at the lower end of the rotating column, and a plurality of rotating blades are installed on the rotating column. The water flow sprayed from the drainage branch pipe hits the rotating blades and drives the rotating column to operate. The diversion seat is connected to the lower end of the water collecting barrel, and the turntable is attached to the diversion seat. A plurality of drainage holes are provided at intervals circumferentially on the diversion seat, and the upper ends of the water drop drainage pipes are connected to the drainage holes one by one; an annular guide groove is provided at the edge of the upper surface of the turntable, and the bottom surface of the guide groove is inclined. An outlet hole is provided at the lowest point of the bottom surface of the guide groove, and the outlet hole can be aligned with any drainage hole.

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