Efficient cooling type automobile electronic water pump

Abstract

The invention relates to the technical field of electronic water pumps, in particular to an efficient cooling type automobile electronic water pump which comprises a pump shell, a pump cover, a rear cover, a stator assembly, a rotor cavity, a mounting shaft, an impeller rotor assembly and a control panel. The rotor cavity communicates with the pump cover and the heat absorbing plate, a first cooling channel is formed in the mounting shaft, and a second cooling channel is formed in the pump shell. The upper end and the lower end of the first cooling channel communicate with the pump cover and the heat absorption plate, and the first cooling channel and the rotor cavity form a first cooling circulation pipeline used for accelerating cooling of the control plate. The problems that existing heat exchange efficiency is low, the flow speed of a liquid medium is low, and heat dissipation is difficult to achieve rapidly are solved. The first cooling channel is used as a common component of the first cooling circulation pipeline and the second cooling circulation pipeline, so that the control panel and the stator assembly can be rapidly cooled at the same time, and the heat dissipation and cooling efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic water pumps, in particular to a high-efficiency cooling type automobile electronic water pump. Background Art

[0002] Electronic water pumps have high output efficiency and can achieve precise flow control. Therefore, electronic water pumps are widely used in automobiles, household appliances and industrial equipment. In particular, new energy vehicles usually have two or even more electronic water pumps. The electronic water pump is the power source of the entire cooling system of new energy vehicles. The power batteries, drive motors, etc. of new energy vehicles all rely on electronic water pumps to drive the coolant for circulation cooling.

[0003] The main control circuit board and stator assembly of the electronic water pump are both components that generate a lot of heat. In order to dissipate heat for the main control circuit board, stator assembly and other components of the electronic water pump, there are usually two methods in the prior art. The first is to set a metal end cover with heat dissipation fins or heat dissipation columns at one end of the electronic water pump, install the control circuit board close to the end cover, and use thermal grease or other heat-conducting media to achieve heat exchange between the control circuit board and the metal end cover, so that the heat is dissipated outward through the heat dissipation fins or heat dissipation columns of the metal end cover; however, this method of heat dissipation using natural convection has low heat exchange efficiency and is difficult to meet the heat dissipation requirements of high-power control circuit boards. The second method is to fill the pump housing of the electronic water pump with a packaging glue with good thermal conductivity to transfer the heat of the stator assembly in the pump housing to the outside of the pump housing, and at the same time, remove the heat from the stator assembly through the liquid medium in the rotor chamber; however, the liquid medium in the rotor chamber has a slow flow rate and is difficult to quickly remove a large amount of heat. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention proposes a high-efficiency cooling type automotive electronic water pump.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0006] A high-efficiency cooling automotive electronic water pump comprises a pump housing, a pump cover and a rear cover, a stator assembly and a rotor chamber disposed within the pump housing, a mounting shaft and an impeller rotor assembly disposed within the rotor chamber, and a control panel disposed at the bottom of the pump housing. The control panel is attached to a heat absorbing plate. The rotor chamber is in communication with the pump cover and the heat absorbing plate, respectively. A first cooling channel is disposed within the mounting shaft, and a second cooling channel is disposed within the pump housing.

[0007] The upper and lower ends of the first cooling channel are connected to the pump cover and the heat absorbing plate, and form a first cooling circulation pipeline with the rotor chamber for accelerating the cooling of the control plate;

[0008] The upper end of the second cooling channel is connected to the pump cover, and the lower end is connected to the lower side of the first cooling channel, forming a second cooling circulation pipeline for accelerating cooling of the stator assembly.

[0009] As a further improvement of the present invention, a cooling cavity for forming a first cooling circulation pipeline is provided inside the heat absorbing plate, and the bottom of the first cooling channel is connected to the cooling cavity.

[0010] As a further improvement of the present invention, a discharge channel for forming a first cooling circulation pipeline is provided between the heat absorbing plate and the rotor chamber, and the discharge channel is communicated with the cooling cavity.

[0011] As a further improvement of the present invention, the first cooling channel is a straight channel, and the first cooling channel is collinear with the central axis of the mounting shaft.

[0012] As a further improvement of the present invention, an in-plane groove is provided on the upper portion of the rotor chamber, and the upper port of the second cooling channel is connected to the in-plane groove.

[0013] As a further improvement of the present invention, the second cooling channel is a spiral channel.

[0014] As a further improvement of the present invention, a laterally arranged diversion channel is provided at the bottom of the rotor chamber, a shaft through hole connected to the first cooling channel is provided on the lower shaft portion of the mounting shaft, a lateral through hole connected to the lower port of the second cooling channel is provided on the side wall of the rotor chamber, and both ends of the diversion channel are correspondingly connected to the shaft through hole and the lateral through hole.

[0015] As a further improvement of the present invention, the second cooling channel is a linear channel, and a plurality of the second cooling channels are equidistantly distributed around the installation axis.

[0016] As a further improvement of the present invention, the bottom of the rotor chamber is provided with a plurality of circumferentially equidistantly distributed diversion channels, the lower shaft portion of the mounting shaft is provided with a plurality of circumferentially equidistantly distributed axial through holes that are all connected to the first cooling channel, and the side wall of the rotor chamber is provided with a plurality of lateral through holes corresponding to the lower ports of the plurality of second cooling channels, and the plurality of diversion channels are connected to the plurality of axial through holes and the plurality of lateral through holes in a one-to-one correspondence.

[0017] As a further improvement of the present invention, the diameter of the first cooling channel is larger than the diameter of the diverter channel.

[0018] The beneficial effects of the present invention are:

[0019] The present invention provides a high-efficiency cooling automotive electronic water pump. A first cooling channel disposed within a mounting shaft, a cooling cavity within a heat absorbing plate, and a discharge channel connected to the cooling cavity and a rotor chamber form a first cooling circulation pipeline for accelerating cooling of a control board. A second cooling channel disposed within a pump housing and adjacent to a stator assembly, and a flow diversion channel connected to the first cooling channel and the second cooling channel form a second cooling circulation pipeline for accelerating cooling of the stator assembly. This solves the problems of low heat exchange efficiency, slow liquid medium flow rate, and difficulty in rapidly dissipating heat in existing systems. Furthermore, the first cooling channel in the present invention, as a common component of the first and second cooling circulation pipelines, achieves simultaneous and rapid cooling of the control board and the stator assembly, further improving heat dissipation and cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of a front cross-sectional structure of embodiment 1 of the present invention;

[0022] Figure 2 for Figure 1 AA cross-sectional structural diagram in;

[0023] Figure 3 This is a schematic diagram of a main cross-sectional structure of a second embodiment of the present invention;

[0024] Figure 4 for Figure 3 Schematic diagram of BB cross-section structure in.

[0025] In the figure: 1. Pump casing; 2. Pump cover; 3. Back cover; 4. Stator assembly; 5. Rotor chamber; 6. Mounting shaft; 7. Impeller rotor assembly; 8. Control board; 9. Heat absorbing plate; 10. Cooling chamber; 11. Discharge channel; 12. First cooling channel; 13. Second cooling channel; 14. In-plane groove; 15. Diverter channel; 16. Shaft through hole; 17. Side through hole. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0027] Example 1: Figures 1 to 2As shown, a high-efficiency cooling type automotive electronic water pump includes a pump housing 1, a pump cover 2 and a back cover 3. The pump cover 2 is connected to the front end of the pump housing 1, and the back cover 3 is connected to the rear end of the pump housing 1. A stator assembly 4 and a rotor chamber 5 are provided inside the pump housing 1. A mounting shaft 6 is provided inside the rotor chamber 5, and an impeller rotor assembly 7 is mounted on the mounting shaft 6. The impeller rotor assembly 7 connects the rotor assembly and the impeller into one body through an integrated injection molding process, which reduces weight and also reduces costs. The impeller in the impeller rotor assembly 7 is inside the pump cover 2. A control panel 8 is provided at the bottom of the pump housing 1, and the control panel 8 is located inside the back cover 3.

[0028] The control board 8 is attached to a heat absorbing plate 9, which is disposed on the inner bottom of the pump housing 1. The rotor chamber 5 is connected to the pump cover 2 and the heat absorbing plate 9, respectively. A first cooling channel 12 is disposed within the mounting shaft 6. The upper and lower ends of the first cooling channel 12 communicate with the pump cover 2 and the heat absorbing plate 9, and together with the rotor chamber 5, form a first cooling circulation pipeline for accelerating the cooling of the control board 8. A second cooling channel 13 is disposed within the pump housing 1. The upper end of the second cooling channel 13 communicates with the pump cover 2, and the lower end communicates with the lower side of the first cooling channel 12, forming a second cooling circulation pipeline for accelerating the cooling of the stator assembly 4.

[0029] Specifically, in this embodiment, the first cooling channel 12 is a linear channel, collinear with the central axis of the mounting shaft 6. A cooling cavity 10 is provided within the heat absorbing plate 9, with the bottom of the first cooling channel 12 communicating with the cooling cavity 10. An exhaust channel 11 is provided between the heat absorbing plate 9 and the rotor chamber 5, communicating with the cooling cavity 10. In this embodiment, three exhaust channels 11 are evenly spaced radially, forming a row of three, and four rows are evenly distributed circumferentially, for a total of twelve.

[0030] In this embodiment, the second cooling channel 13 is a spiral channel. A planar groove 14 is provided at the top of the rotor chamber 5, and the upper end of the second cooling channel 13 is connected to the planar groove 14. A transversely arranged shunt channel 15 is provided at the bottom of the rotor chamber 5. A shaft through-hole 16 is provided on the lower shaft portion of the mounting shaft 6, which is connected to the first cooling channel 12. A lateral through-hole 17 is provided on the sidewall of the rotor chamber 5, which is connected to the lower end of the second cooling channel 13. The two ends of the shunt channel 15 are connected to the shaft through-hole 16 and the lateral through-hole 17, respectively.

[0031] Through the above structure, during the use of the water pump, the liquid entering the water pump enters the first cooling channel 12 through the upper port of the first cooling channel 12, and a part of it enters the cooling cavity 10 inside the heat absorption plate 9 through the bottom of the first cooling channel 12 to absorb the heat generated by the control board 8, and then enters the rotor chamber 5 through the discharge channel 11. Since the rotor chamber 5 is connected with the pump cover 2, the liquid with heat is discharged from the pump cover 2; the other part enters the diversion channel 15 through the axial through hole 16, and enters the second cooling channel 13 through the lateral through hole 17. Since the second cooling channel 13 is spiral, it can absorb the heat generated by the stator assembly 4 to the greatest extent, and discharge it through the upper port, and enter the pump cover 2 through the in-plane groove 14 and be discharged.

[0032] Example 2

[0033] like Figures 3 and 4 As shown, the difference from Example 1 is that the second cooling channel 13 is a linear channel, with several equidistantly distributed circumferentially around the mounting shaft 6. In this embodiment, there are six second cooling channels 13. The bottom of the rotor chamber 5 is provided with several circumferentially equidistantly distributed diverter channels 15. The lower shaft portion of the mounting shaft 6 is provided with several circumferentially equidistantly distributed shaft through-holes 16 that are all connected to the first cooling channel 12. The side walls of the rotor chamber 5 are provided with several lateral through-holes 17 that are connected to the lower ports of several second cooling channels 13. Several diverter channels 15 are connected to several shaft through-holes 16 and several lateral through-holes 17 in a one-to-one correspondence. In this embodiment, there are six diverter channels 15, six shaft through-holes 16, and six lateral through-holes 17. In this embodiment, to ensure that the first cooling channel 12 can simultaneously provide liquid diversion for six diverter channels 15, the diameter of the first cooling channel 12 is larger than the diameter of the diverter channel 15.

[0034] Through the above structure, during the use of the water pump, the liquid entering the water pump enters the first cooling channel 12 through the upper port of the first cooling channel 12, and a part of it enters the cooling cavity 10 inside the heat absorption plate 9 through the bottom of the first cooling channel 12 to absorb the heat generated by the control board 8, and then enters the rotor chamber 5 through the discharge channel 11. Since the rotor chamber 5 is connected with the pump cover 2, the liquid with heat is discharged from the pump cover 2; the other part enters the six diversion channels 15 through the six axial through holes 16, and enters the six second cooling channels 13 through the six lateral through holes 17. The liquid flows from bottom to top and absorbs the heat generated by the stator assembly 4, and is discharged through the upper port, enters the pump cover 2 through the in-plane groove 14 and is discharged.

[0035] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and description merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency cooling type automotive electronic water pump, comprising a pump housing (1), a pump cover (2) and a rear cover (3), a stator assembly (4) and a rotor chamber (5) disposed inside the pump housing (1), a mounting shaft (6) and an impeller rotor assembly (7) disposed in the rotor chamber (5), and a control panel (8) disposed at the bottom of the pump housing (1), characterized in that: The control plate (8) is attached to a heat absorbing plate (9), the rotor chamber (5) is respectively connected to the pump cover (2) and the heat absorbing plate (9), a first cooling channel (12) is provided inside the mounting shaft (6), and a second cooling channel (13) is provided inside the pump housing (1); The upper and lower ends of the first cooling channel (12) are connected to the pump cover (2) and the heat absorbing plate (9), and together with the rotor chamber (5) form a first cooling circulation pipeline for accelerating the cooling of the control plate (8); The upper end of the second cooling channel (13) is connected to the pump cover (2), and the lower end is connected to the lower side of the first cooling channel (12), forming a second cooling circulation pipeline for accelerating the cooling of the stator assembly (4).

2. The high-efficiency cooling automotive electronic water pump according to claim 1, characterized in that: A cooling cavity (10) for forming a first cooling circulation pipeline is provided inside the heat absorbing plate (9), and the bottom of the first cooling channel (12) is connected to the cooling cavity (10).

3. The high-efficiency cooling automotive electronic water pump according to claim 2, characterized in that: A discharge channel (11) for forming a first cooling circulation pipeline is provided between the heat absorbing plate (9) and the rotor chamber (5), and the discharge channel (11) is communicated with the cooling chamber (10).

4. The high-efficiency cooling automotive electronic water pump according to claim 1, characterized in that: The first cooling channel (12) is a straight channel, and the first cooling channel (12) is collinear with the central axis of the mounting shaft (6).

5. The high-efficiency cooling automotive electronic water pump according to claim 1, characterized in that: An in-plane groove (14) is provided at the upper portion of the rotor chamber (5), and an upper port of the second cooling channel (13) is communicated with the in-plane groove (14).

6. The high-efficiency cooling automotive electronic water pump according to claim 1, characterized in that: The second cooling channel (13) is a spiral channel.

7. The high-efficiency cooling automotive electronic water pump according to claim 6, characterized in that: A transversely arranged shunt channel (15) is provided at the bottom of the rotor chamber (5); a shaft through hole (16) communicating with the first cooling channel (12) is provided on the lower shaft portion of the mounting shaft (6); a lateral through hole (17) communicating with the lower end of the second cooling channel (13) is provided on the side wall of the rotor chamber (5); and both ends of the shunt channel (15) are correspondingly connected to the shaft through hole (16) and the lateral through hole (17).

8. The high-efficiency cooling automotive electronic water pump according to claim 1, characterized in that: The second cooling channels (13) are linear channels, and a plurality of the channels are equidistantly distributed in the circumferential direction with the installation shaft (6) as the center.

9. The high-efficiency cooling automotive electronic water pump according to claim 8, characterized in that: The bottom of the rotor chamber (5) is provided with a plurality of circumferentially equidistantly distributed diverter channels (15); the lower shaft portion of the mounting shaft (6) is provided with a plurality of circumferentially equidistantly distributed shaft through holes (16) which are all in communication with the first cooling channel (12); the side wall of the rotor chamber (5) is provided with a plurality of lateral through holes (17) which are in communication with the lower ports of the plurality of second cooling channels (13); the plurality of diverter channels (15) are in one-to-one communication with the plurality of shaft through holes (16) and the plurality of lateral through holes (17).

10. The high-efficiency cooling automotive electronic water pump according to claim 9, characterized in that: The diameter of the first cooling channel (12) is greater than the diameter of the diverter channel (15).

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