Water-cooled heat-dissipation electronic water pump

Abstract

The application relates to the technical field of electronic water pumps, and particularly discloses a water-cooled heat-dissipation electronic water pump which comprises an upper shell and a lower shell connected with each other, the upper shell and the lower shell surround to form an installation cavity, a water isolation sleeve is arranged in the installation cavity, a rotor is rotationally arranged in the water isolation sleeve, and a stator assembly is arranged in the annular area between the lower shell and the water isolation sleeve; a heat conduction piece is connected to the bottom of the water isolation sleeve, a control circuit board is arranged below the heat conduction piece, and the control circuit board is connected to the inner wall of the lower shell; a communication hole is arranged in the bottom of the water isolation sleeve; and the water isolation sleeve and the heat conduction piece are sealingly connected. The cooling liquid can directly contact the heat conduction piece, and the heat conduction piece can conduct the heat transferred from the control circuit board, so that the heat on the control circuit board is indirectly taken away by the cooling liquid. Compared with the heat dissipation mode of a traditional water isolation sleeve, the heat dissipation efficiency is greatly improved, the problems of frequency reduction and service life shortening of the electronic water pump caused by overheating of the controller and other electronic elements on the control circuit board are avoided, and the performance of the water pump is effectively improved.

Description

Technical Field

[0001] This application relates to the field of electronic water pump technology, and more particularly to a water-cooled electronic water pump. Background Technology

[0002] An electronic water pump is an intelligent fluid device that uses an electronically controlled drive unit (such as a brushless DC motor) to directly drive the impeller to rotate, thereby achieving the directional delivery of coolant.

[0003] The main components of an automotive electronic water pump include a controller, a motor and impeller, a volute, and a water jacket. The controller controls the motor to rotate, which in turn drives the impeller to rotate. By relying on centrifugal force, the antifreeze is thrown out. In traditional cars, it can provide coolant circulation power output for the cooling circuits of the engine, turbocharger, and intercooler. In new energy vehicles, it can provide coolant circulation power output for the cooling circuits of major heat-generating components such as the motor, electronic control system, and battery.

[0004] The conventional automotive electronic water pump water jacket is made of plastic and is used to separate the coolant from the motor and controller. The heat generated by the controller is usually conducted away by the die-cast aluminum back cover or by the coolant through thermal grease contacting the water jacket. However, due to the extremely poor thermal conductivity of plastic products and the relatively small surface area of ​​the back cover, both of these heat dissipation methods severely limit the performance of the water pump. Overheating of the controller can cause the electronic water pump to reduce its frequency, resulting in a decrease in the water pump's output capacity. Severe overheating can also reduce the lifespan of the water pump. Utility Model Content

[0005] The purpose of this application is to provide a water-cooled electronic water pump to solve the above-mentioned problems.

[0006] To achieve the above objectives, the technical solution of this application is as follows:

[0007] A water-cooled electronic water pump includes an upper housing and a lower housing connected to each other. The upper housing and the lower housing form an installation cavity. A water-proof sleeve is provided inside the installation cavity. A rotor is rotatably mounted in the water-proof sleeve. A stator assembly is provided in the annular region between the lower housing and the water-proof sleeve. A heat-conducting element is connected to the bottom of the water-proof sleeve. A control circuit board is provided below the heat-conducting element and is connected to the inner wall of the lower housing. A connecting hole is opened at the bottom of the water-proof sleeve. The water-proof sleeve and the heat-conducting element are sealed and snapped together.

[0008] Preferably, there are multiple connecting holes, and the multiple connecting holes are circumferentially spaced.

[0009] Preferably, the heat-conducting component includes a base plate and a snap-fit ​​ring; a sealing ring is provided between the snap-fit ​​ring and the outer wall of the water-proof sleeve.

[0010] Preferably, it also includes a rotating shaft, the bottom of which is connected to the water-proof sleeve, the top of which is connected to the upper housing, and the rotor is rotatably sleeved on the rotating shaft.

[0011] Preferably, a gap is provided between the control circuit board and the base plate, and thermally conductive silicone grease is provided in the gap.

[0012] Preferably, the outer peripheral wall of the rotor is provided with a connecting groove, the connecting groove is arranged vertically, and there are multiple connecting grooves, which are arranged circumferentially at intervals.

[0013] The outer peripheral wall of the rotor is provided with a spiral plate so that the rotor drives the liquid to move upward when it rotates.

[0014] Preferably, the bottom of the water-proof sleeve is provided with a baffle blade; the number of baffle blades is multiple, and the multiple baffle blades are arranged circumferentially at intervals.

[0015] Preferably, the upper sidewall of the base plate is provided with a heat-conducting groove.

[0016] Preferably, the rotor is provided with an impeller on the portion of the upper housing; the upper housing is provided with an inlet and an outlet.

[0017] Preferably, the bottom of the lower housing is provided with a rear cover.

[0018] The water-cooled electronic water pump disclosed in this application allows the coolant to directly contact the heat-conducting component, carrying away the heat from the component. The heat-conducting component, in turn, conducts heat from the control circuit board, thus indirectly carrying away the heat from the control circuit board through the coolant. Compared to the traditional water jacket cooling method, this significantly improves heat dissipation efficiency and avoids the problems of frequency reduction and shortened lifespan of the electronic water pump caused by overheating of the controller and other electronic components on the control circuit board, effectively enhancing the water pump performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a top view of the overall structure of this application;

[0021] Figure 3 for Figure 2 Sectional view of section AA;

[0022] Figure 4 This is an exploded view of the internal structure of this application;

[0023] Figure 5 This is a schematic diagram of the rotor structure in this application;

[0024] Figure 6This is a schematic diagram of the water-proof sleeve structure in this application;

[0025] Figure 7 This is a schematic diagram of the water-proof sleeve from another angle in this application;

[0026] Figure 8 This is a top view of the water-proof sleeve in this application;

[0027] Figure 9 This is a schematic diagram of the thermal conductive component structure in this application.

[0028] In the picture:

[0029] 1. Upper housing; 10. Liquid inlet; 11. Liquid outlet; 2. Lower housing; 3. Rear cover; 4. Rotor; 40. Impeller; 41. Spiral plate; 42. Turbulence blade; 43. Connecting groove; 5. Waterproof sleeve; 50. Sealing ring; 51. Connecting hole; 52. Rib; 6. Heat-conducting component; 60. Gap; 61. Base plate; 62. Snap-fit ​​ring; 63. Heat-conducting groove; 7. Stator assembly; 8. Rotating shaft; 9. Control circuit board. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present application, and therefore only show the components relevant to the present application.

[0031] like Figure 1-9 As shown, the overall structure of this water-cooled heat dissipation electronic water pump consists of an upper shell 1 and a lower shell 2 that are connected to each other. The two shells enclose a mounting cavity, which provides mounting space for the internal components.

[0032] The mounting cavity is equipped with a water-proof sleeve 5, and a rotor 4 is rotatably mounted in the water-proof sleeve 5. A stator assembly 7 is provided in the annular area between the lower housing 2 and the water-proof sleeve 5. The stator assembly 7 and the rotor 4 cooperate to realize the motor driving function.

[0033] A heat-conducting component 6 is connected to the bottom of the water-proof sleeve 5. A control circuit board 9 is located below the heat-conducting component 6 and is connected to the inner wall of the lower housing 2. The control circuit board 9 is electrically connected to the heat-conducting component 6.

[0034] Specifically, the bottom of the water-insulating sleeve 5 has a connecting hole 51. This design allows the coolant to connect with the heat-conducting component 6 through the connecting hole 51, which helps to remove heat. At the same time, the water-insulating sleeve 5 and the heat-conducting component 6 are sealed and snapped together. This sealing and snapping method ensures a tight connection between the water-insulating sleeve 5 and the heat-conducting component 6, preventing coolant leakage. Through this structure, the coolant can directly contact the heat-conducting component 6, removing the heat from the heat-conducting component 6. The heat-conducting component 6 can then conduct the heat transferred from the control circuit board 9, thereby indirectly removing the heat from the control circuit board 9 through the coolant and transferring the heat away. Compared with the traditional heat dissipation method of the water-insulating sleeve 5, this greatly improves the heat dissipation efficiency and avoids the problem of the electronic water pump frequency reduction and shortened lifespan caused by overheating of the controller and other electronic components on the control circuit board 9, effectively improving the performance of the water pump.

[0035] In some other embodiments, the heat-conducting element 6 may be a die-cast aluminum part.

[0036] In some further embodiments, there are multiple connecting holes 51, and these multiple connecting holes 51 are circumferentially spaced. The design of multiple connecting holes 51 allows the coolant to make more thorough contact with the heat-conducting component 6, carrying away more heat. The circumferentially spaced arrangement ensures that the coolant makes uniform contact with the heat-conducting component 6, avoiding localized overheating or uneven cooling, further improving the heat dissipation effect and ensuring that the electric water pump maintains good heat dissipation performance under different operating conditions.

[0037] Meanwhile, a rib plate 52 integrally formed with the water-proof sleeve 5 is provided between two adjacent connecting holes 51 to avoid the setting of the connecting holes 51 affecting the structural strength of the water-proof sleeve 5.

[0038] In some further embodiments, the heat-conducting component 6 includes a base plate 61 and a snap-fit ​​ring 62, with a sealing ring 50 between the snap-fit ​​ring 62 and the outer wall of the water-insulating sleeve 5. The base plate 61 is the main part of the heat-conducting component 6 and can contact components such as the control circuit board 9 to achieve heat transfer. The design of the snap-fit ​​ring 62 allows the heat-conducting component 6 to be easily snapped into the water-insulating sleeve 5, while the sealing ring 50 plays a crucial sealing role, preventing coolant leakage from the snap-fit ​​point and improving the heat dissipation stability and reliability of the entire electronic water pump.

[0039] In some further embodiments, the water-cooled electronic water pump also includes a rotating shaft 8. The bottom of the rotating shaft 8 is connected to the water-proof sleeve 5, and the top of the rotating shaft 8 is connected to the upper housing 1. The rotor 4 is rotatably mounted on the rotating shaft 8. The rotating shaft 8 provides support and positioning for the rotation of the rotor 4, ensuring that the rotor 4 can rotate stably within the water-proof sleeve 5. The connection between the rotating shaft 8, the water-proof sleeve 5, and the upper housing 1 ensures the stability of the entire structure, preventing the rotor 4 from shaking or shifting during rotation, thereby ensuring the normal operation and efficient functioning of the electronic water pump. Simultaneously, this structure facilitates the assembly and disassembly of the electronic water pump, improving production efficiency and maintenance convenience.

[0040] In some further embodiments, a gap 60 is provided between the control circuit board 9 and the base plate 61, and thermal grease is placed within the gap 60. The gap 60 provides sufficient space between the control circuit board 9 and the base plate 61, facilitating the filling of the thermal grease. The thermal grease has excellent thermal conductivity, enabling it to fill the small gap 60 between the control circuit board 9 and the base plate 61, quickly transferring the heat generated by the control circuit board 9 to the base plate 61, where it is then dissipated by the coolant. This design significantly improves the heat dissipation efficiency of the control circuit board 9, avoiding performance degradation and shortened lifespan caused by overheating, and ensuring the stable and reliable operation of the electronic water pump.

[0041] In some further embodiments, the outer peripheral wall of the rotor 4 is provided with a connecting groove 43, which is vertically arranged, multiple in number and circumferentially spaced; at the same time, the outer peripheral wall of the rotor 4 is provided with a spiral plate 41 so that the rotor 4 drives the liquid to move upward when it rotates.

[0042] The connecting groove 43 allows the coolant to flow through a section in the middle of the rotor 4 to the bottom of the rotor 4 so that it can contact the heat-conducting element 6 through the connecting hole 51; the rotating rotor 4 can also transport the coolant from bottom to top, thereby achieving the fluidity of the coolant in contact with the base plate 61 and improving the efficiency of heat exchange.

[0043] In some further embodiments, the bottom of the water-proof jacket 5 is provided with multiple circumferentially spaced baffles 42. The baffles 42 create disturbances during coolant flow, breaking the laminar flow and creating turbulent flow. In turbulent flow, the coolant flows more vigorously, allowing for more thorough contact with the heat-conducting component 6 and carrying away more heat. The multiple circumferentially spaced baffles 42 ensure uniform agitation of the coolant at the bottom of the water-proof jacket 5, improving the heat dissipation efficiency of the entire heat dissipation area and further enhancing the heat dissipation performance of the electric water pump.

[0044] The deflector blades 42 are mainly used to improve the flow of coolant in contact with the base plate 61.

[0045] In some further embodiments, the upper sidewall of the base plate 61 is provided with heat-conducting grooves 63. The heat-conducting grooves 63 increase the contact area between the base plate 61 and the thermal grease or coolant, allowing heat to be transferred away from the base plate 61 more quickly. When the coolant flows through the base plate 61, the heat-conducting grooves 63 guide the flow of the coolant, increasing the contact time between the coolant and the base plate 61 and improving heat dissipation. This ensures that the electric water pump maintains good heat dissipation performance during long-term operation.

[0046] In some further embodiments, the rotor 4 is equipped with an impeller 40 on the portion of the upper housing 1, and the upper housing 1 has an inlet 10 and an outlet 11. The impeller 40 is a key component for the electric water pump to achieve its liquid delivery function. When the rotor 4 rotates, the impeller 40 rotates accordingly, generating centrifugal force, which draws coolant from the inlet 10, passes through the inside of the electric water pump, and then discharges it from the outlet 11, thus achieving directional delivery of the coolant. The reasonable arrangement of the inlet 10 and outlet 11 ensures that the coolant can smoothly enter and exit the electric water pump, meeting the needs of the vehicle's cooling system. This structure enables the electric water pump to provide reliable coolant circulation power output to heat-generating components such as the vehicle's engine and motor, ensuring the normal operation of the vehicle.

[0047] In some further embodiments, a rear cover 3 is provided at the bottom of the lower housing 2. The rear cover 3 protects the internal components of the electronic water pump, preventing external dust, moisture, and other impurities from entering the pump and affecting its normal operation. The presence of the rear cover 3 makes the overall structure of the electronic water pump more complete and stable, improving its reliability and service life.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A water-cooled heat dissipation electronic water pump, comprising an upper housing (1) and a lower housing (2) connected to each other, the upper housing (1) and the lower housing (2) forming an installation cavity, a water-proof sleeve (5) being provided in the installation cavity, a rotor (4) being rotatably provided in the water-proof sleeve (5), and a stator assembly (7) being provided in the annular region between the lower housing (2) and the water-proof sleeve (5); a heat-conducting element (6) is connected to the bottom of the water-proof sleeve (5), a control circuit board (9) is provided below the heat-conducting element (6), and the control circuit board (9) is connected to the inner wall of the lower housing (2); characterized in that, The bottom of the water-proof sleeve (5) is provided with a connecting hole (51); the water-proof sleeve (5) is sealed and snapped into the heat-conducting component (6).

2. The water-cooled heat dissipation electronic water pump according to claim 1, characterized in that, The number of the connecting holes (51) is multiple, and the multiple connecting holes (51) are arranged circumferentially at intervals.

3. The water-cooled heat dissipation electronic water pump according to claim 1, characterized in that, The heat-conducting component (6) includes a base plate (61) and a snap ring (62); a sealing ring (50) is provided between the snap ring (62) and the outer wall of the water-proof sleeve (5).

4. The water-cooled heat dissipation electronic water pump according to claim 1, characterized in that, It also includes a rotating shaft (8), the bottom of which is connected to the water-proof sleeve (5), the top of which is connected to the upper housing (1), and the rotor (4) is rotatably sleeved on the rotating shaft (8).

5. The water-cooled heat dissipation electronic water pump according to claim 3, characterized in that, A gap (60) is provided between the control circuit board (9) and the base plate (61), and thermal grease is provided in the gap (60).

6. The water-cooled heat dissipation electronic water pump according to claim 3, characterized in that, The outer peripheral wall of the rotor (4) is provided with a connecting groove (43), the connecting groove (43) is arranged vertically, and there are multiple connecting grooves (43) arranged circumferentially at intervals; The outer peripheral wall of the rotor (4) is provided with a spiral plate (41) so that the rotor (4) drives the liquid to move upward when it rotates.

7. The water-cooled heat dissipation electronic water pump according to claim 6, characterized in that, The bottom of the water-proof sleeve (5) is provided with a turbulence-disrupting blade (42); there are multiple turbulence-disrupting blades (42), and the multiple turbulence-disrupting blades (42) are arranged circumferentially at intervals.

8. The water-cooled heat dissipation electronic water pump according to claim 6, characterized in that, The upper side wall of the base plate (61) is provided with a heat conduction groove (63).

9. The water-cooled heat dissipation electronic water pump according to claim 1, characterized in that, The rotor (4) is provided with an impeller (40) on the part of the upper housing (1); the upper housing (1) is provided with an inlet (10) and an outlet (11).

10. The water-cooled heat dissipation electronic water pump according to claim 1, characterized in that, The bottom of the lower housing (2) is provided with a rear cover (3).

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