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KR-20260066308-A - AXIAL FLUX MOTOR PUMP

KR20260066308AKR 20260066308 AKR20260066308 AKR 20260066308AKR-20260066308-A

Abstract

A motor pump according to the present invention comprises: a housing; an impeller mounted on the housing; a magnet mounted on the impeller and arranged to form a magnetic flux in a direction parallel to the rotation axis of the impeller; and a circuit board having a coil pattern formed thereon capable of generating a magnetic flux in a direction parallel to the rotation axis to interact with the magnet by electrical control, wherein the impeller includes a lower shroud formed at the lower part of a blade, and the lower shroud has a shroud extension that extends to have a radius larger than the outermost radius of the blade to form the lower surface of a volute.

Inventors

  • 이현태
  • 손성진

Assignees

  • 주식회사 코아비스

Dates

Publication Date
20260512
Application Date
20241104

Claims (13)

  1. Housing; An impeller mounted on the above housing; A magnet mounted on the impeller and arranged to form a magnetic flux in a direction parallel to the rotation axis of the impeller; and It includes a circuit board having a coil pattern formed thereon capable of generating a magnetic flux in a direction parallel to the axis of rotation to interact with the magnet by electrical control, and The above impeller includes a lower shroud formed on the lower part of the blade, and A motor pump having a shroud extension that extends to have a radius larger than the outermost radius of the blade and forms the lower surface of the volute.
  2. In paragraph 1, The above shroud extension is integrally formed with the same material as the lower shroud, for a motor pump.
  3. In paragraph 1, A motor pump, wherein the above shroud extension is formed to have an outer diameter larger than the outer diameter of the volute formed around the blade.
  4. In paragraph 1, The above housing includes a first inner surface for forming the volute and a second inner surface formed horizontally outward from the bottom of the first inner surface, and A motor pump having a horizontal gap formed between the upper surface of the shroud extension and the second inner surface for fluid to pass through.
  5. In paragraph 1, The above impeller further includes an upper shroud covering the blade, and A motor pump, wherein the above shroud extension is formed in a shape having a radius larger than the outer diameter of the upper shroud.
  6. In paragraph 1, A motor pump further comprising a diaphragm disposed on the upper part of the circuit board and formed to block fluid directed toward the lower part of the circuit board.
  7. In paragraph 1, The above magnet is positioned only between the impeller and the diaphragm, in a motor pump.
  8. In paragraph 1, The above magnet is integrally attached to the above impeller by overmolding, in a motor pump.
  9. In paragraph 1, An extension body for fixing the magnet is formed at the lower part of the above impeller, and A motor pump comprising a key-shaped portion between the extension body and the magnet to prevent rotation of the magnet.
  10. In Paragraph 9, The above-mentioned extension body includes a reverse taper shape section in which the diameter increases toward the bottom, forming a motor pump.
  11. In Paragraph 10, A motor pump further comprising a first yoke disposed between the magnet and the lower shroud.
  12. In Paragraph 11, The above magnet has an outer diameter equal to the outer diameter of the above shroud extension, in a motor pump.
  13. An upper housing having an inlet formed in the center and an outlet formed at the edge; An impeller accommodated in the upper housing above; A magnet mounted on the lower part of the impeller and arranged to form a magnetic flux in a direction parallel to the rotation axis of the impeller; A circuit board having a coil pattern formed thereon capable of generating a magnetic flux in a direction parallel to the axis of rotation to interact with the magnet by electrical control; and It includes a lower housing coupled to the upper housing and formed to allow the circuit board to be installed thereon, The above impeller includes a lower shroud formed on the lower part of the blade, and A motor pump having a shroud extension that extends to have a radius larger than the outermost radius of the blade and forms the lower surface of the volute.

Description

Motor Pump {AXIAL FLUX MOTOR PUMP} The present invention relates to a motor pump. A motor pump is a fluid machine that combines a motor, which converts electrical energy into mechanical energy, and a pump, which moves fluid using the driving force of the motor. In the automotive sector, motor pumps are applied to various systems and play a crucial role in improving vehicle performance, fuel efficiency, and reducing emissions. Compared to pumps that utilize engine driving force, motor pumps produce less noise and vibration and are environmentally friendly as they use electrical energy. With the emergence of electric and autonomous vehicles, the applications of motor pumps in the automotive industry are expanding to include cooling systems, air conditioning and heating systems, fuel supply systems, oil supply systems, braking systems, and steering systems. Pumps vary depending on their structure and operating principles, and regarding electric motors, another key component of motor pumps, axial flux motors (AFM) are sometimes adopted in addition to traditional radial flux motors (RFMs) due to their advantages in terms of efficiency, output, and weight reduction. * Related prior art WO 2023-082002 A1 (Published May 19, 2023) US 10141804 B2 (Registered Nov 27, 2018) KR 10-1237023 B1 (Published on Feb. 19, 2013) FIG. 1 is a schematic external perspective view of a motor pump according to an example of the present invention. FIG. 2 is an exemplary cross-sectional view of the motor pump of FIG. 1. FIG. 3 is an exemplary exploded perspective view of the motor pump of FIG. 1. FIG. 4 is an exploded perspective view showing the impeller and rotor assembly related to the present invention separated for explanation purposes. Figure 5 is a cross-sectional view showing an enlarged portion of the motor pump of Figure 2. FIG. 6 is a conceptual diagram illustrating the cooling action by the fluid when the motor pump related to the present invention is in operation. Hereinafter, a motor pump related to the present invention will be described in detail with reference to the attached drawings. The details shown in the drawings are for convenience of the present invention and do not reflect actual dimensions, and the possibility that the size or thickness may be exaggerated or reduced to highlight the features of the invention cannot be ruled out. The present invention is not limited to the configurations and methods of the embodiments described in the disclosure below. Various modifications to the embodiments may be made to replaceable equivalents, and all or part of each embodiment may be optionally combined. The terms used in this specification and claims are not limited to their dictionary meanings alone, but may be appropriately defined and understood accordingly to best describe the invention. The terms "comprising" or "consisting of" as used in the specification or claims refer to the existence of a combination of parts, components, steps, etc., and should be understood as not excluding in advance the possibility of combining additional parts, components, or steps. If it is stated that a specific component and another component are "connected" or "combined," it should be understood to include cases where these components are "directly" connected or combined with each other, as well as cases where another component is interposed between them to connect or combine "indirectly." Conversely, if it is stated that a specific component and another component are "directly connected" or "directly combined," it should be understood that no other component exists between these components. FIG. 1 shows a schematic appearance of an exemplary motor pump (100) according to the present invention. The illustrated motor pump (100) is in the form of an assembly of an upper housing (110) and a lower housing (140) having a generally disc-shaped appearance. Here, 'upper' and 'lower' are named for convenience with reference to FIG. 1, and the direction and position of the motor pump (100) may differ when the actual motor pump (100) is mounted on an object of application. The fluid pumped through the motor pump (100) may be a liquid. In this disclosure, a motor pump (100) for pumping water as a liquid will be described. An exemplary object of application for such a motor pump (100) may be a thermal management system of a vehicle or a coolant circulation pump for achieving this. The upper housing (110) may have an inlet (111) positioned at the center and an outlet (112) positioned at the edge. Since the inlet (111) is positioned to penetrate the upper housing (110) vertically and the outlet (112) is formed tangentially around the upper housing (110), the motor pump (100) may be in a shape suitable for applying a centrifugal impeller (120; see FIG. 2 and FIG. 3) inside. The lower housing (140) may be relatively thin compared to the vertical width of the upper housing (110) to accommodate the installation space for the inlet (111), the discharge (1