Water-cooled heat dissipation electronic water pump and water-cooled system

Abstract

The utility model discloses a water -cooling heat dissipation electronic water pump and water -cooling system, water -cooling heat dissipation electronic water pump includes the electric control chamber and liquid cooling chamber of not intercommunication, and liquid cooling chamber sets up through -hole to intercommunication electric control chamber and liquid cooling chamber, correspondingly, be equipped with sealed heat conduction unit between electric control chamber and liquid cooling chamber to make liquid cooling chamber be used for electric control chamber heat dissipation. Water -cooling system includes water -cooling heat dissipation electronic water pump. Sealed heat conduction unit realizes the cooling liquid for electric control chamber heat dissipation on the basis, effectively avoid that the cooling liquid will not infiltrate electric control chamber, guarantee the control panel normal work in electric control chamber, and then realize the long -term stable work of electronic water pump, prolong the service life of electronic water pump.

Description

Technical Field

[0001] This utility model relates to the field of electronic water pump technology, specifically to a water-cooled heat dissipation electronic water pump and water cooling system. Background Technology

[0002] An electric water pump is an electrically driven liquid transfer device with a wide range of applications. For example, when used in new energy vehicles, an electric water pump can provide cooling fluid circulation power output for the cooling circuits of major heat-generating components such as motors, electronic controls, and batteries.

[0003] In existing technologies, electronic water pumps include a plastic water jacket to separate the coolant from the motor and controller. Heat generated by the controller is typically dissipated by a die-cast aluminum back cover, or by thermally conductive silicone grease contacting the water jacket and being carried away by the coolant. Both of these heat dissipation methods have drawbacks. Specifically: the back cover has a relatively small surface area due to its size, resulting in poor heat dissipation efficiency; and the extremely poor thermal conductivity of plastic products limits the heat dissipation efficiency of the water jacket.

[0004] Therefore, both of these heat dissipation methods severely limit the performance of the water pump. Overheating of the controller will cause the electronic water pump to reduce its frequency, resulting in a decrease in the water pump's output capacity. Severe overheating will also reduce the lifespan of the water pump. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the heat dissipation method of electronic water pumps limits their performance. The purpose is to provide a water-cooled electronic water pump and water cooling system to solve the above-mentioned problem.

[0006] This utility model is achieved through the following technical solution:

[0007] In a first aspect, this utility model provides a water-cooled heat dissipation electronic water pump, including an electrically controlled chamber and a liquid-cooled chamber that are not interconnected. The liquid-cooled chamber has a through hole to connect the electrically controlled chamber and the liquid-cooled chamber. Correspondingly, a sealed heat-conducting unit is provided between the electrically controlled chamber and the liquid-cooled chamber so that the liquid-cooled chamber can be used for heat dissipation of the electrically controlled chamber.

[0008] In one possible design, the sealed heat-conducting unit includes a heat-conducting plate and a sealing ring. The heat-conducting plate connects to the liquid-cooled chamber and seals the through hole. At least two sealing rings are provided and located at the connection between the heat-conducting plate and the liquid-cooled chamber. Accordingly, multiple sealing rings form a multi-layer seal.

[0009] In one possible design, the heat-conducting plate has two opposing outer surfaces, one of which is constructed as a liquid-cooled surface with a retaining ring inserted into the side wall of the liquid-cooled chamber to connect the heat-conducting plate and the liquid-cooled chamber, and the other is constructed as a heat-conducting surface that abuts against the heating element in the electronic control chamber.

[0010] Accordingly, two sealing rings are provided and are respectively located on both sides of the retaining ring. One of the two sealing rings is used for end face sealing, and the other is used for radial sealing.

[0011] In one possible design, the heat-conducting plate includes a base plate and an extension plate;

[0012] The retaining ring, liquid cooling surface and heat-conducting surface are all located on the substrate. The heat-conducting surface of the substrate is provided with a heat-conducting area for contacting the heat-generating element. The heat-conducting area is located on the substrate or outside the substrate. When the heat-conducting area is located outside the substrate, the substrate structure is an irregular plate.

[0013] Several extension plates are provided and spaced apart. One end of the extension plate is connected to the base plate, and the other end of the extension plate is used to connect to the liquid cooling chamber.

[0014] In one possible design, the water-cooled heat dissipation electronic water pump includes an upper housing, a lower housing, and a rear cover connected in sequence;

[0015] The upper housing is connected to the rotor, and the lower housing is connected to the stator. The upper housing is connected to the lower housing so that the rotor can be inserted into the stator. Correspondingly, the gap between the upper housing and the lower housing is used as a liquid cooling chamber.

[0016] The lower housing is connected to the rear cover, and the gap between the lower housing and the rear cover is used as an electrical control chamber. The electrical control chamber is equipped with a control board for controlling the operation of the rotor.

[0017] In one possible design, the rotor includes a shaft and an impeller, with one end of the shaft inserted into the stator and the other end of the rotor connected to the impeller by a nut.

[0018] The nut is threaded to the shaft, and there is a welding point between the nut and the shaft formed by laser spot welding; the lower part of the nut is provided with an inwardly extending limiting ring, and correspondingly, the shaft is provided with a limiting groove that fits the limiting ring.

[0019] A ceramic washer is provided below the nut, and a gap is left between the nut and the ceramic washer.

[0020] In one possible design, an annular air gap is left between the rotor and the stator, and the rotor is covered with a metal cladding plate to reduce the width of the air gap.

[0021] The metal cladding plate is constructed of a stainless steel cylinder. One end of the metal cladding plate is used to abut against the rotor, and the other end of the metal cladding plate is provided with an inwardly extending retaining ring. The rotor is provided with a matching retaining groove.

[0022] In one possible design, one end of the lower shell is connected to the upper shell through a first annular welding surface. Accordingly, the first welding surface is formed by solidifying the molten material melted by the rotational friction at the contact point between the lower shell and the upper shell.

[0023] The other end of the lower shell is connected to the rear cover through a second annular welding surface. Correspondingly, the second welding surface is formed by the solidification of molten material melted by the rotational friction between the lower shell and the rear cover.

[0024] In one possible design, the lower housing is fitted with an elastic clamp, and the lower housing is connected to the stator via a plastic coating layer.

[0025] Secondly, this utility model provides a water cooling system, including the aforementioned water-cooled heat dissipation electronic water pump.

[0026] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0027] The sealed heat-conducting unit effectively prevents coolant from seeping into the electronic control chamber while ensuring the coolant dissipates heat to the electronic control chamber. This guarantees the normal operation of the control board inside the electronic control chamber, thereby enabling the long-term stable operation of the electronic water pump and extending its service life. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 and Figure 2 This is a schematic diagram of the structure of a water-cooled electronic water pump of different models.

[0030] Figure 3 for Figure 2 A cross-sectional structural diagram.

[0031] Figure 4 for Figure 3 A frontal view of the structure.

[0032] Figure 5 This is a schematic diagram showing the assembly of the rotor, stator, sealing heat conduction unit, and control board.

[0033] Figure 6 This is a schematic diagram of the heat-conducting plate.

[0034] Figure 7 This is a schematic diagram of the structure at the end of the shaft.

[0035] Figure 8 This is a schematic diagram of the structure of a metal-clad plate.

[0036] Figure 9 This is a schematic diagram of the first welded surface between the upper and lower shells.

[0037] The attached diagram shows the markings and corresponding component names:

[0038] 1. Electrical control chamber; 2. Liquid cooling chamber; 3. Through hole; 4. Heat-conducting plate; 401. Base plate; 402. Outer plate; 403. Retaining ring; 404. Heat-conducting zone; 5. Sealing ring; 6. Upper shell; 7. Lower shell; 8. Rear cover; 9. Rotor; 901. Shaft; 902. Impeller; 903. Nut; 904. Limiting ring; 905. Ceramic gasket; 10. Stator; 11. Control board; 12. Metal cladding plate; 13. Elastic clamp. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0040] Example:

[0041] In existing electronic water pumps, the operation is controlled by a controller. The controller's heat is dissipated through a plastic water-resistant sleeve or a rear cover 8. While the plastic water-resistant sleeve has poor thermal conductivity, its material selection requires consideration of multiple factors, including corrosion resistance, dimensional stability, and sealing performance; it cannot be simply replaced with a material with better thermal conductivity. The rear cover 8 has a small surface area, but its dimensions must be compatible with the size of the electronic water pump and the available space; directly increasing the size of the rear cover 8 is not convenient. Therefore, existing electronic water pumps are prone to overheating due to poor controller heat dissipation during use, which in turn affects the pump's performance.

[0042] Based on the intended use of electric water pumps—specifically, the coolant contained within the pump flows to heat-generating components to dissipate heat—the coolant can also be used to cool internal components of the electric water pump, such as its controller. However, considering that the controller cannot directly contact the coolant, the structure of the electric water pump needs to be modified.

[0043] like Figures 1-9 As shown, in a first aspect, the present invention provides a water-cooled heat dissipation electronic water pump, including an electronically controlled chamber 1 and a liquid-cooled chamber 2 that are not interconnected. The liquid-cooled chamber 2 has a through hole 3 to connect the electronically controlled chamber 1 and the liquid-cooled chamber 2. Correspondingly, a sealed heat-conducting unit is provided between the electronically controlled chamber 1 and the liquid-cooled chamber 2 so that the liquid-cooled chamber 2 can be used for heat dissipation of the electronically controlled chamber 1.

[0044] In the described water-cooled electronic water pump, a control board 11 is installed in the electronic control chamber 1, and coolant is contained in the liquid-cooled chamber 2. The two previously unconnected chambers are connected by a through-hole 3, allowing the coolant to act on the electronic control chamber 1. This enables heat exchange between the control board 11 and the coolant, thus dissipating heat from the electronic control chamber 1. Simultaneously, since the controller cannot directly contact the coolant, an intermediate component is required as a barrier to prevent coolant from flowing into the electronic control chamber 1. This intermediate component also possesses good thermal conductivity to transfer heat from the electronic control chamber 1 to the coolant. Furthermore, to ensure that coolant does not seep into the electronic control chamber 1, the intermediate component must also be airtight.

[0045] Therefore, the intermediate component is constructed as a sealed heat-conducting unit, which effectively prevents the coolant from seeping into the electronic control chamber 1 while ensuring that the control board 11 inside the electronic control chamber 1 works normally. This, in turn, enables the electronic water pump to work stably for a long time and extends its service life.

[0046] Compared to the water-proof jacket, the sealed heat-conducting unit can be made of materials with good thermal conductivity, which effectively improves the heat conduction efficiency and heat dissipation performance. Compared to the rear cover 8, the size of the sealed heat-conducting unit is easier to control, and it can directly contact the coolant and heat-generating components, resulting in better heat conduction efficiency and heat dissipation performance.

[0047] In one possible implementation, the sealed heat-conducting unit includes a heat-conducting plate 4 and a sealing ring 5. The heat-conducting plate 4 connects to the liquid-cooled chamber 2 and blocks the through hole 3. At least two sealing rings 5 ​​are provided and located at the connection between the heat-conducting plate 4 and the liquid-cooled chamber 2. Accordingly, multiple sealing rings 5 ​​form a multi-seal.

[0048] Based on the above design, the liquid cooling chamber 2 has a through hole 3, which is then sealed by a heat-conducting plate 4. This, combined with the sealing ring 5, forms a multiple seal, preventing coolant from seeping into the electronic control chamber 1 and reducing the risk of damage to the control board 11 due to leakage from the electronic water pump. The heat-conducting plate 4 also has good thermal conductivity, effectively transferring heat from the control board 11 to the coolant, improving the heat dissipation capacity of the electronic water pump and preventing heat accumulation on the control board 11.

[0049] Preferably, such as Figures 3-6 As shown, the heat-conducting plate 4 has two opposing outer surfaces, one of which is a liquid-cooled surface with a retaining ring 403. The retaining ring 403 is inserted into the side wall of the liquid-cooled chamber 2 to connect the heat-conducting plate 4 and the liquid-cooled chamber 2. The other is a heat-conducting surface that abuts against the heating element in the electronic control chamber 1.

[0050] Accordingly, there are two sealing rings 5, which are respectively disposed on both sides of the retaining ring. One of the two sealing rings 5 ​​is used for end face sealing, and the other is used for radial sealing.

[0051] Based on the above design, the two outer surfaces of the heat-conducting plate 4 directly contact the coolant and the heating element, respectively, avoiding the formation of an intermediate air layer, maximizing the heat conduction efficiency, effectively improving the heat dissipation capacity, and ensuring that the heat of the heating element of the control board 11 is conducted in a timely manner, so that the control board 11 has better stability during long-term operation.

[0052] In addition, the heat-conducting plate 4 is provided with a retaining ring 403 that is inserted into the side wall of the liquid cooling chamber 2. The outwardly extending retaining ring 403 makes the contact surface between the heat-conducting plate 4 and the liquid cooling chamber 2 undulate, which increases the difficulty of coolant penetration on the one hand, and cooperates with the sealing ring 5 to form a double sealing scheme of end face + radial. The sealing performance is improved by using different types of sealing forms, so that the multiple seals are not simply stacked. The number of sealing rings 5 ​​is reduced as much as possible while ensuring sealing performance.

[0053] Optionally, such as Figure 6 As shown, the heat-conducting plate 4 includes a base plate 401 and an extension plate 402;

[0054] The retaining ring 403, the liquid cooling surface and the heat-conducting surface are all located on the substrate 401. The heat-conducting surface of the substrate 401 is provided with a heat-conducting area 404 for contacting the heat-generating element. The heat-conducting area 404 is located on the substrate 401 or outside the substrate 401. When the heat-conducting area 404 is located outside the substrate 401, the substrate 401 is constructed as an irregular plate.

[0055] The extension plate 402 is provided in several and spaced apart. One end of the extension plate 402 is connected to the base plate 401, and the other end of the extension plate 402 is used to connect to the liquid cooling chamber 2.

[0056] Based on the above design, the cross-sectional area of ​​the substrate 401 is larger than the flow cross-sectional area of ​​the through hole 3 to ensure that the heat-conducting plate 4 can completely cover the through hole 3. The extension plate 402 is fixedly connected by any suitable detachable connection method such as bolts. By adjusting the tightness of the bolts, a certain degree of sealing is achieved while maintaining the fixed connection. It is easy to understand that those skilled in the art can adjust the shape, number, and position of the extension plates 402 according to the shape characteristics of the actual installation location to achieve the best installation effect.

[0057] For the control board 11 used in the electric water pump, taking a PCB (Printed Circuit Board) as an example, it has different types of electronic components. These electronic components generate heat when they are working. Depending on the different application scenarios, the type and model of the PCB, as well as the type, model, and location of the electronic components, will vary. The number and location of the heat-conducting areas 404 on the substrate 401 also need to be adjusted accordingly. Accordingly, the substrate 401 is generally preferably constructed in a regular shape such as a circle or square. However, when the heat-conducting areas 404 are located outside the substrate 401, the substrate 401 is constructed as an irregular board.

[0058] In other words, the control board 11 needs to be customized according to the specific application scenario of the electronic water pump. In order to meet the heat dissipation requirements of the control board 11, the shape of the heat conduction plate 4 also needs to be adapted.

[0059] In one possible implementation, the water-cooled heat dissipation electronic water pump includes an upper housing 6, a lower housing 7, and a rear cover 8 connected in sequence.

[0060] The upper housing 6 is connected to the rotor 9, and the lower housing 7 is connected to the stator 10. The upper housing 6 is connected to the lower housing 7 so that the rotor 9 can be inserted into the stator 10. Correspondingly, the gap between the upper housing 6 and the lower housing 7 is used as a liquid cooling chamber 2.

[0061] The lower housing 7 is connected to the rear cover 8. The gap between the lower housing 7 and the rear cover 8 is used as the electrical control chamber 1. The electrical control chamber 1 is equipped with a control board 11 for controlling the operation of the rotor 9.

[0062] Based on the above design, the upper housing 6 is connected to the lower housing 7 so that the rotor 9 and stator 10 are in the working position and form the liquid cooling chamber 2. The stator 10 and rotor 9 cooperate with each other to drive the flow of coolant. The lower housing 7 is connected to the rear cover 8 to form the electrical control chamber 1, so as to install the control board 11. The control board 11 is electrically connected to the stator 10 and is used to control the operation of the electronic water pump.

[0063] Optionally, for the control board 11, a hot-melt head is formed by a hot-riveting process, and the control board 11 is fixed on the heat-conducting plate 4 by the hot-melt head, thereby improving the stability and reliability of the connection of the control board 11.

[0064] In one possible implementation, the rotor 9 includes a shaft 901 and an impeller 902. One end of the shaft 901 is inserted into the stator 10, and the other end of the rotor 9 is connected to the impeller 902 by a nut 903.

[0065] Nut 903 is threaded to shaft 901, and there is a welding point formed by laser spot welding between nut 903 and shaft 901; the lower part of nut 903 is provided with an inwardly extending limiting ring 904, and correspondingly, shaft 901 is provided with a limiting groove adapted to the limiting ring 904.

[0066] A ceramic washer 905 is provided below the nut 903, and a gap is left between the nut 903 and the ceramic washer 905.

[0067] Based on the above design, the rotor 9 can reach speeds of several thousand revolutions per minute during operation, thus generating significant axial impact forces. A nut 903 is used as the connecting component at the junction of the shaft 901 and the impeller 902, which helps to withstand higher axial impact forces and ensures the stability of the rotor 9 during operation. Simultaneously, a limiting structure, namely a limiting ring 904 and a limiting groove, is provided between the nut 903 and the shaft 901. This limiting structure effectively restricts the position of the nut 903, preventing it from contacting the ceramic gasket 905 below it, thereby avoiding wear caused by contact. Furthermore, the ceramic gasket 905 provides mechanical and insulation protection, enhancing the internal compressive strength of the electronic water pump.

[0068] Preferably, a welding point formed by laser spot welding is provided between the nut 903 and the rotating shaft 901 to reduce the risk of the nut 903 loosening.

[0069] In one possible implementation, an annular air gap is left between the rotor 9 and the stator 10, and the rotor 9 is covered with a metal cladding plate 12 to reduce the width of the air gap.

[0070] Based on the above design, in an electronic water pump, the smaller the gap (i.e., air gap) between the rotor 9 and the stator 10, the better, as a smaller air gap contributes to improved pump performance. However, due to manufacturing errors and the need to ensure coolant flow, the air gap cannot be too small. Furthermore, existing technologies use plastic coverings to encase the rotor 9, but these plastic coverings are affected by coolant temperature, causing dynamic changes in the air gap width and impacting the pump's operational stability. Therefore, a metal covering plate is chosen as a replacement.

[0071] The metal-clad plate 12 not only has more stable performance and reduces the impact of temperature, but also helps to stabilize and reduce the air gap width, thereby improving the performance of the electric water pump.

[0072] Optionally, the metal cladding plate 12 is constructed as a stainless steel cylinder. It is readily understood that the metal cladding plate 12 can also be made of any other suitable material.

[0073] Optionally, such as Figure 8As shown, one end of the metal cladding plate 12 is used to abut against the rotor 9, and the other end of the metal cladding plate 12 is provided with an inwardly extending retaining ring, and the rotor 9 is provided with a matching retaining groove. It is easy to understand that the metal cladding plate 12 can also be constructed in any other suitable shape, and this utility model does not impose any limitations on it.

[0074] In one possible implementation, one end of the lower shell 7 is connected to the upper shell 6 through a first annular welding surface. Accordingly, the first welding surface is formed by solidifying the molten material melted by the rotational friction at the contact point between the lower shell 7 and the upper shell 6.

[0075] The other end of the lower housing 7 is connected to the rear cover 8 through a second annular welding surface. Correspondingly, the second welding surface is formed by the solidification of molten material melted by the rotational friction between the lower housing 7 and the rear cover 8.

[0076] Based on the above design scheme, in the prior art, the housings of electronic water pumps are connected by screws, which takes up a large volume, is heavy, and has poor sealing performance. Therefore, in the water-cooled electronic water pump, the upper housing 6, the lower housing 7, and the rear cover 8 are connected by a welded surface.

[0077] Specifically, taking the connection between the upper shell 6 and the lower shell 7 as an example, one of the upper shell 6 and the lower shell 7 has an outwardly protruding connecting ring, and the other has an inwardly concave annular groove. When the upper shell 6 and the lower shell 7 are connected, the connecting ring is inserted into the annular groove, and then the upper shell 6 and the lower shell 7 are connected by rotary friction welding. Due to the high-speed rotation, the connecting ring and the annular groove generate heat through friction. The heat causes the contact area between the connecting ring and the annular groove to melt and generate molten material. After the molten material solidifies, it forms the first welding surface and realizes the connection between the two. Similarly, the lower shell 7 and the rear cover 8 are connected through the second welding surface.

[0078] This improves sealing reliability, eliminates conventional screw connections, and facilitates miniaturization and weight reduction.

[0079] In one possible implementation, the lower housing 7 is fitted with an elastic clamp 13. Based on this, the elastic clamp 13, such as being made of rubber, serves to reduce vibration and noise, and can reduce impact, thus helping to improve the service life of the water-cooled electronic water pump. It is readily understood that the elastic clamp 13 can also be made of any other suitable material.

[0080] In one possible implementation, the lower housing 7 is connected to the stator 10 via a plastic coating layer. Based on this, the wound stator 10 and the lower housing 7 are integrated through the plastic coating process, improving component integration and reducing the noise of the electric water pump.

[0081] Secondly, this utility model provides a water-cooling system, including the aforementioned water-cooled heat dissipation electronic water pump. Based on this, the water-cooling system can also include other suitable functional modules in addition to the water-cooled heat dissipation electronic water pump, resulting in richer functionality to meet different working requirements and improved practicality. Furthermore, it is readily understood that the functional modules can be any suitable existing equipment, offering a wide range of choices.

[0082] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A water-cooled electronic water pump, characterized in that, It includes an electrically controlled chamber (1) and a liquid-cooled chamber (2) that are not connected to each other. The liquid-cooled chamber (2) has a through hole (3) to connect the electrically controlled chamber (1) and the liquid-cooled chamber (2). Correspondingly, a sealed heat-conducting unit is provided between the electrically controlled chamber (1) and the liquid-cooled chamber (2) so that the liquid-cooled chamber (2) can be used to dissipate heat from the electrically controlled chamber (1).

2. The water-cooled heat dissipation electronic water pump according to claim 1, characterized in that, The sealed heat-conducting unit includes a heat-conducting plate (4) and a sealing ring (5). The heat-conducting plate (4) connects to the liquid-cooled chamber (2) and seals the through hole (3). There are at least two sealing rings (5) located at the connection between the heat-conducting plate (4) and the liquid-cooled chamber (2). Accordingly, multiple sealing rings (5) form a multi-seal.

3. The water-cooled heat dissipation electronic water pump according to claim 2, characterized in that, The heat-conducting plate (4) has two opposing outer surfaces, one of which is a liquid-cooled surface with a retaining ring (403) inserted into the side wall of the liquid-cooled chamber (2) to connect the heat-conducting plate (4) and the liquid-cooled chamber (2), and the other is a heat-conducting surface that abuts against the heating element in the electronic control chamber (1); Accordingly, two sealing rings (5) are provided and respectively disposed on both sides of the retaining ring. One of the two sealing rings (5) is used as an end face seal and the other is used as a radial seal.

4. The water-cooled heat dissipation electronic water pump according to claim 3, characterized in that, The heat-conducting plate (4) includes a base plate (401) and an extension plate (402); The retaining ring (403), the liquid cooling surface and the heat-conducting surface are all located on the substrate (401). The heat-conducting surface of the substrate (401) is provided with a heat-conducting area (404) for contacting the heat-generating element. The heat-conducting area (404) is located on the substrate (401) or outside the substrate (401). When the heat-conducting area (404) is located outside the substrate (401), the substrate (401) is constructed as an irregular plate. The extension plate (402) is provided in several and spaced apart. One end of the extension plate (402) is connected to the base plate (401), and the other end of the extension plate (402) is used to connect to the liquid cooling chamber (2).

5. The water-cooled electronic water pump according to any one of claims 1-4, characterized in that, The water-cooled heat dissipation electronic water pump includes an upper housing (6), a lower housing (7), and a rear cover (8) connected in sequence. The upper housing (6) is connected to the rotor (9), and the lower housing (7) is connected to the stator (10). The upper housing (6) is connected to the lower housing (7) so that the rotor (9) can be inserted into the stator (10). Accordingly, the gap between the upper housing (6) and the lower housing (7) is used as a liquid cooling chamber (2). The lower housing (7) is connected to the rear cover (8). The gap between the lower housing (7) and the rear cover (8) is used as an electrical control chamber (1). The electrical control chamber (1) is equipped with a control board (11) for controlling the operation of the rotor (9).

6. The water-cooled heat dissipation electronic water pump according to claim 5, characterized in that, The rotor (9) includes a shaft (901) and an impeller (902). One end of the shaft (901) is inserted into the stator (10), and the other end of the rotor (9) is connected to the impeller (902) by a nut (903). The nut (903) is connected to the shaft (901) by a thread, and a welding point formed by laser spot welding is provided between the nut (903) and the shaft (901); the lower part of the nut (903) is provided with an inwardly extending limiting ring (904), and correspondingly, the shaft (901) is provided with a limiting groove adapted to the limiting ring (904); A ceramic washer (905) is provided below the nut (903), and a gap is left between the nut (903) and the ceramic washer (905).

7. The water-cooled heat dissipation electronic water pump according to claim 5, characterized in that, An annular air gap is left between the rotor (9) and the stator (10), and the rotor (9) is covered with a metal cladding plate (12) to reduce the width of the air gap. The metal cladding plate (12) is constructed as a stainless steel cylinder. One end of the metal cladding plate (12) is used to abut against the rotor (9), and the other end of the metal cladding plate (12) is provided with an inwardly extending retaining ring. The rotor (9) is provided with a matching retaining groove.

8. The water-cooled heat dissipation electronic water pump according to claim 5, characterized in that, One end of the lower shell (7) is connected to the upper shell (6) through a first annular welding surface. Correspondingly, the first welding surface is formed by solidifying the molten material melted by the rotational friction at the contact point between the lower shell (7) and the upper shell (6). The other end of the lower shell (7) is connected to the rear cover (8) through a second annular welding surface. Correspondingly, the second welding surface is formed by solidifying the molten material melted by the rotational friction at the contact point between the lower shell (7) and the rear cover (8).

9. The water-cooled heat dissipation electronic water pump according to claim 5, characterized in that, The lower housing (7) is covered with an elastic clamp (13), and the lower housing (7) is connected to the stator (10) through a plastic coating layer.

10. A water-cooling system, characterized in that, The water-cooled heat dissipation electronic water pump includes any one of claims 1-9.

Images