Liquid pump with axial flux motor

Abstract

The invention discloses a liquid pump with an axial magnetic flux motor, and relates to the technical field of liquid pumps, the liquid pump with the axial magnetic flux motor comprises a shell, the axial magnetic flux motor and a pump impeller, the shell is provided with a pump liquid cavity, a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the pump liquid cavity; the axial magnetic flux motor is arranged in the shell; the pump wheel is arranged in the pump liquid cavity and connected to the output end of the axial magnetic flux motor in a driving mode. According to the technical scheme, the size of the liquid pump can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid pumps, and in particular to a liquid pump with an axial magnetic flux motor. Background Art

[0002] Liquid pumps, used to pump liquids including water, can be further categorized into water pumps and submersible pumps. Submersible pumps are designed to integrate the pump body and motor and operate completely submerged in liquid. Micro submersible pumps are commonly used in medical devices, automobiles, household appliances, and healthcare massage equipment, and have lower power requirements. In related technologies, micro submersible pumps typically have larger motors, resulting in larger overall dimensions, making them difficult to adapt to installation scenarios with limited space. Summary of the Invention

[0003] The main object of the present invention is to provide a liquid pump with an axial flux motor, aiming to reduce the size of the liquid pump.

[0004] To achieve the above objectives, the present invention provides a liquid pump having an axial flux motor, comprising:

[0005] The housing is provided with a pump liquid cavity, a liquid inlet and a liquid outlet communicating with the pump liquid cavity;

[0006] an axial flux motor, disposed in the housing; and

[0007] The pump wheel is arranged in the pump fluid chamber and is drivingly connected to the output end of the axial flux motor.

[0008] In one embodiment, the axial flux motor includes a stator structure, wherein the stator structure includes a circuit substrate and a stator winding integrated on the circuit substrate, and the circuit substrate is connected to the housing.

[0009] In one embodiment, the housing includes a volute portion, the liquid inlet is provided in the middle of the volute portion, the liquid outlet is provided at the outer periphery of the volute portion, and the pump wheel is configured as a centrifugal impeller and is provided in the volute portion.

[0010] In one embodiment, the volute portion has a first end face and a second end face distributed along the axial direction of the pump wheel, the liquid inlet is provided on the first end face, the second end face is provided with a mounting opening, the circuit substrate is closely connected to the edge of the mounting opening, and the circuit substrate and the volute portion jointly define the pump liquid chamber.

[0011] In one embodiment, the stator winding is provided on an end surface of the circuit substrate away from the pump fluid chamber.

[0012] In one embodiment, the housing further includes a mounting portion provided on the second end surface, the mounting portion is provided with a mounting groove, the mounting opening passes through a bottom wall of the mounting groove, and the circuit substrate is at least partially accommodated in the mounting groove.

[0013] In one embodiment, the circuit substrate sealing cover is provided on the second end face, and the shell further includes a first bracket, which is sleeved on the outer peripheral side of the circuit substrate, and the outer peripheral side of the first bracket abuts against the side wall of the mounting groove, and the stator structure and the first bracket are sealed in the mounting groove by glue.

[0014] In one embodiment, the shell further includes a liquid outlet pipe portion connected to the outer periphery of the volute portion, the liquid outlet pipe portion includes a first pipe section and a second pipe section that intersect and communicate with each other, the water inlet end of the first pipe section is connected to the pump liquid chamber, the liquid outlet is formed at the water outlet end of the second pipe section, the second pipe section extends along the axial direction of the pump wheel and protrudes from the first end surface, and the volute portion, the mounting portion and the liquid outlet pipe portion are integrally formed.

[0015] In one embodiment, the liquid pump also includes a second bracket arranged at the liquid inlet, and the liquid pump also includes a mounting shaft and a shaft sleeve, one end of the mounting shaft is fixedly arranged on the second bracket, and the other end is fixedly arranged on the circuit substrate, and the shaft sleeve is rotatably sleeved on the outer circumferential surface of the mounting shaft and fixedly connected to the impeller.

[0016] In one embodiment, the pump wheel includes a base and an impeller arranged on the base, the base is provided with a mounting protrusion ring protruding toward the liquid inlet, the mounting protrusion ring is sleeved on the outer circumference of the shaft sleeve, and the impeller is arranged around the outer circumference of the mounting protrusion ring.

[0017] In one embodiment, the pump wheel includes a base and an impeller arranged on the base, and the axial flux motor also includes a rotor magnet. The base is provided with a receiving groove on the end face close to the circuit substrate, and the rotor magnet is arranged in the receiving groove.

[0018] In one embodiment, a ratio of an axial dimension to a radial dimension of the liquid pump is less than 0.7.

[0019] The technical solution of the present invention can reduce the axial size of the motor by changing the conventional radial flux motor into an axial flux motor, thereby reducing the axial size of the liquid pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of an embodiment of a liquid pump provided by the present invention at a certain viewing angle;

[0022] Figure 2 for Figure 1 A schematic structural diagram of the liquid pump shown in another perspective;

[0023] Figure 3 for Figure 1 A top view of the liquid pump shown;

[0024] Figure 4 for Figure 3 Cross-sectional view at AA in the middle;

[0025] Figure 5 for Figure 3 Cross-sectional view at the middle BB;

[0026] Figure 6 for Figure 1 An exploded view of the liquid pump shown at one perspective;

[0027] Figure 7 for Figure 1 An exploded view of the liquid pump shown in another perspective;

[0028] Figure 8 for Figure 7 a cross-sectional view of the middle shell;

[0029] Figure 9 for Figure 8 a bottom view of the housing shown;

[0030] Figure 10 for Figure 9 a left side view of the housing shown;

[0031] Figure 11 for Figure 7 Top view of the middle pump wheel;

[0032] Figure 12 for Figure 11 A cross-sectional view of the impeller is shown.

[0033] Description of Figure Numbers:

[0034] 100, housing; 110, pump fluid chamber; 111, fluid inlet; 112, fluid outlet; 113, pump chamber section; 114, water outlet chamber section; 120, volute; 121, first end surface; 122, second end surface; 123, mounting opening; 130, mounting portion; 131, mounting groove; 132, circular groove section; 133, square groove section; 140, fluid outlet pipe section; 141, first pipe section; 142, second pipe section; 150, second bracket;

[0035] 200, axial flux motor; 210, stator structure; 211, circuit substrate; 213, pin interface; 214, connection hole; 220, rotor magnet;

[0036] 300, pump wheel; 310, base; 311, mounting convex ring; 312, receiving groove; 320, impeller;

[0037] 410, first bracket; 420, third bracket;

[0038] 510. Install the shaft; 520. Install the shaft sleeve.

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] Liquid pumps, used to pump liquids including water, can be further categorized into water pumps and submersible pumps. Submersible pumps are pumps that integrate the pump body and motor and operate completely submerged in liquid. Micro submersible pumps are commonly used in medical devices, automobiles, household appliances, and healthcare massage equipment, and have relatively low power requirements. In related technologies, micro submersible pumps typically use radial flux motors. Due to their large axial dimensions, these motors also have large axial dimensions, making them difficult to adapt to installation scenarios with limited space.

[0044] In view of this, the present invention proposes a liquid pump with an axial flux motor to reduce the size of the liquid pump.

[0045] See also Figures 1 to 5 In one embodiment of the present invention, the liquid pump with the axial flux motor 200 includes a housing 100, the axial flux motor 200 and a pump wheel 300. The housing 100 is provided with a pump liquid chamber 110, a liquid inlet 111 and a liquid outlet 112 connected to the pump liquid chamber 110; the axial flux motor 200 is arranged in the housing 100; the pump wheel 300 is arranged in the pump liquid chamber 110 and is driven and connected to the output end of the axial flux motor 200.

[0046] The technical solution of the present invention can reduce the axial size of the motor by replacing the conventional radial flux motor with an axial flux motor 200, thereby reducing the axial size of the liquid pump.

[0047] In an embodiment of the present invention, the ratio of the axial dimension to the radial dimension of the liquid pump can optionally be less than 0.7, such as 0.4, 0.5, or 0.6. For example, if the axial dimension of the liquid pump is 27 mm and the radial dimension is 45 mm, the ratio of the axial dimension to the radial dimension is 0.6. In other words, the axial dimension of the liquid pump is smaller than its radial dimension, resulting in an overall axially flattened structure, which facilitates operation in confined spaces.

[0048] In an embodiment of the present invention, the power of the liquid pump can optionally range from 0.1W to 50W, such as 0.5W, 1W, 5W, 10W, 15W, 20W, 25W, 30W, 35W, 40W, or 45W. In this way, the volume can be made smaller while being applicable to most micro submersible pump application scenarios.

[0049] It should be noted that the liquid pump of the embodiment of the present invention has application product fields including but not limited to water pumps or submersible pumps. Among them, in the submersible pump product, the specific application scenarios of the liquid pump include but are not limited to medical equipment, automobiles, household appliances and health massage equipment. For example, in the automotive field, the liquid pump can be used as a submersible pump in the sunroof drainage system, and its power range is 3W to 10W; it can also be used in the liquid circulation system of liquid-cooled / heated seats, and its power range is 10W to 20W; it can also be used in the power battery cooling system of electric vehicles to pump and circulate coolant to maintain the temperature of the power battery within an appropriate range, and its power range is 20W to 50W.

[0050] It is understandable that in applications such as skylight drainage systems, the installation space is limited, so the volume and size of the micro liquid pump are required to be as small as possible. The liquid pump of the embodiment of the present invention is sufficiently flat, so it can be well suited for such application scenarios with limited installation space.

[0051] Without loss of generality, the axial flux motor 200 includes a stator structure 210 and a rotor structure. The stator structure 210 and the rotor structure are distributed along the axial direction. The axial magnetic flux generated by the stator structure 210 can drive the rotor structure to rotate and promote the output end of the axial flux motor 200 to rotate, thereby promoting the pump wheel 300 on the output end to rotate, thereby realizing water flow transportation.

[0052] In the embodiment of the present invention, the number of stator structures 210 and rotor structures is not specifically limited. For example, in this embodiment, the number of stator structures 210 and rotor structures is set to one to minimize the axial size of the liquid pump. Of course, in other embodiments, the number of stator structures 210 can be two or more, and / or the number of rotor structures can be two or more. In the embodiment where there are two or more rotor structures, the multiple rotor structures can be arranged on the same side of the stator structure in the axial direction, or at least two rotor structures can be arranged on opposite sides of the stator structure in the axial direction.

[0053] In one embodiment, the stator structure 210 includes a circuit substrate 211 and a stator winding (not shown in the accompanying drawings) integrated on the circuit substrate 211, and the circuit substrate 211 is connected to the housing 100. That is, in this embodiment, the stator structure 210 constructs the stator winding in the form of an integrated circuit board (i.e., PCB), which can realize the integrated design of the stator structure 210 and simplify the production and assembly process of the stator structure 210. In this way, the axial dimension of the liquid pump can be further reduced. Specifically, optionally, a plurality of stator windings are provided, and the plurality of stator windings are spaced apart along the circumference of the circuit substrate 211 (i.e., the circumference of the pump wheel 300) and constitute a three-phase coil to realize the structure of an inductive motor. Of course, in other embodiments, the stator structure 210 may also include a stator core and a stator winding wound on the outer circumference of the stator core.

[0054] In this embodiment, a control circuit (not shown) and a pin interface 213 are optionally integrated on the circuit substrate 211. The control module is electrically connected to the stator winding and the pin interface 213, and the pin interface 213 is used to insert and install conductive pins. Specifically, the conductive pins are electrically connected to an external control module (including a power supply and a control unit) to enable transmission of electrical signals between the external control module and the control circuit. Powered and controlled by the external control module, the control circuit can control the stator winding to generate a rotating magnetic field, thereby driving the rotor structure to rotate, thereby driving the pump impeller 300 to rotate.

[0055] See also Figures 6 to 8 Optionally, the housing 100 includes a volute portion 120, a liquid inlet 111 disposed in the middle of the volute portion 120, a liquid outlet 112 communicating with the outer periphery of the volute portion 120, and the pump impeller 300 configured as a centrifugal impeller and disposed within the volute portion 120. That is, the pump impeller 300 in this embodiment is a centrifugal impeller, which can improve operating efficiency and reduce energy consumption of the liquid pump. Of course, in other embodiments, the pump impeller 300 can also be configured as other structural forms, such as an axial flow impeller 320 or a swirl impeller 320.

[0056] Please also refer to Figures 4 and 5 Optionally, the volute portion 120 has a first end face 121 and a second end face 122 distributed along the axial direction of the pump impeller 300, the liquid inlet 111 is provided on the first end face 121, the second end face 122 is provided with a mounting opening 123, the circuit substrate 211 is closely connected to the edge of the mounting opening 123, and the circuit substrate 211 and the volute portion 120 jointly define the pump liquid chamber 110. In other words, the circuit substrate 211 is also reused as the end cover of the volute portion 120, which not only facilitates the installation of the pump impeller 300 to improve the production efficiency of the liquid pump, but also simplifies the structure of the housing 100 to reduce the production cost of the liquid pump. Of course, in other embodiments, the second end face 122 of the volute portion 120 may not be provided with the mounting opening 123, and the circuit substrate 211 may be separated from the pump liquid chamber 110.

[0057] Optionally, the stator winding is disposed on the end surface of the circuit substrate 211 away from the pump fluid chamber 110. This separates the stator winding from the pump fluid chamber 110, thereby enhancing the sealing protection of the stator winding and reducing the risk of damage to the stator winding from water vapor erosion. Of course, in other embodiments, the stator winding can also be disposed on the end surface of the circuit substrate 211 closer to the pump fluid chamber 110, while simultaneously utilizing potting and sealing methods to achieve sealing protection for the stator winding.

[0058] See also Figure 3 、 Figure 4 and Figure 8 Optionally, the housing 100 further includes a mounting portion 130 disposed on the second end surface 122. The mounting portion 130 is provided with a mounting groove 131. The mounting opening 123 extends through the bottom wall of the mounting groove 131. The circuit substrate 211 is at least partially received within the mounting groove 131. Thus, by accommodating the circuit substrate 211 in the mounting groove 131, the risk of damage to the integrated circuit board can be reduced. Of course, in other embodiments, the mounting portion 130 and the mounting groove 131 may not be provided, and the circuit substrate 211 may be directly mounted on the second end surface 122.

[0059] See also Figure 8 and Figure 9 Optionally, the pump liquid chamber 110 includes a water pump chamber section 113 and a water outlet chamber section 114 that are connected to each other. The water outlet chamber section 114 is connected to the outer peripheral side of the water pump chamber section 113. The water pump chamber section 113 is respectively provided with a liquid inlet 111 and an installation opening 123 on two opposite cavity walls. The shape of the water pump chamber section 113 is roughly cylindrical; the installation groove 131 includes a circular groove section 132 and a square groove section 133 that are distributed and connected along the radial direction of the pump wheel 300. The square groove section 133 is connected to the outer peripheral side of the circular groove section 132 and accommodates the pin interface 213 of the circuit substrate 211. The circular groove section 132 is axially arranged opposite to and connected to the water pump chamber section 113. The shape of the circular groove section 132 is roughly cylindrical, and the diameter of the circular groove section 132 is larger than the diameter of the water pump chamber section 113. On the one hand, the axial dimension of the water pump cavity section 113 is smaller than the axial dimension of the circular slot section 132. That is, the pump liquid cavity 110 is designed to be radially smaller than the mounting slot 131. This can minimize the volume of the liquid pump while meeting the size and power requirements of the integrated circuit board. On the other hand, arranging the pin interface 213 of the integrated circuit board within the square slot section 133 can prevent the conductive pins from encroaching on the layout space of the circular slot section 132, thereby facilitating the arrangement of the stator winding and control circuit in the area of the circuit substrate 211 corresponding to the circular slot section 132. Of course, in other embodiments, the square slot section 133 can be omitted, or the diameters of the circular slot section 132 and the water pump cavity section 113 can be set to be the same.

[0060] See also Figure 4 and Figure 5 Optionally, a sealing cover for the circuit substrate 211 is disposed on the second end surface 122, and the liquid pump further includes a first bracket 410. The first bracket 410 is sleeved around the outer periphery of the circuit substrate 211, with the outer periphery of the first bracket 410 abutting against the sidewalls of the mounting groove 131. Thus, the first bracket 410 serves as a positioning and retaining structure for the circuit substrate 211, enabling the circuit substrate 211 to be more accurately installed within the mounting groove 131. Of course, in other embodiments, the first bracket 410 may not be provided.

[0061] Optionally, the stator structure 210 and the first bracket 410 are sealed within the mounting groove 131 by potting glue. For example, after the integrated circuit board with integrated stator windings and the first bracket 410 are placed in the mounting groove 131, glue is poured into the mounting groove 131 to encapsulate and secure the integrated circuit board and the first bracket 410. In this way, the cured glue in the mounting groove 131 not only completely covers the end surface of the circuit substrate 211 where the stator windings are integrated, but also fills the gaps between the various components, thereby protecting the circuit substrate 211 from moisture. Of course, in other embodiments, other methods can also be used to achieve sealed installation of the integrated circuit board.

[0062] See also Figure 5 and Figure 6 Optionally, the first bracket 410 is provided with a supporting flange on the inner edge of the end surface close to the pump wheel 300, and the supporting flange is provided in the gap between the bottom surface of the mounting groove 131 and the second end surface 122. In this way, by adding a supporting flange to fill the gap, it can not only provide additional support for the circuit substrate 211, but also avoid the problem of poor filling in the gap during glue injection, thereby improving the connection reliability and airtightness between the circuit substrate 211 and the housing 100. Specifically, as Figure 5 As shown, the cross-section of the first bracket 410 is in an “L” shape, and the supporting flange is the short side of the “L”.

[0063] See also Figure 4 and Figure 10Optionally, the housing 100 further includes a liquid outlet pipe portion 140 connected to the outer periphery of the volute portion 120. The liquid outlet pipe portion 140 includes a first pipe segment 141 and a second pipe segment 142 that intersect and communicate with each other. The water inlet end of the first pipe segment 141 is connected to the pump liquid chamber 110, and the liquid outlet 112 is formed at the water outlet end of the second pipe segment 142. The second pipe segment 142 extends along the axial direction of the pump impeller 300 and protrudes from the first end surface 121. In this way, the liquid outlet 112 and the liquid inlet 111 are oriented in the same direction and are located on the same side of the liquid pump. This allows the end surface of the liquid pump away from the liquid inlet 111 to be completely attached to the bottom or wall, and also avoids the problem of the liquid inlet 111 being blocked due to being attached to the bottom or wall, thereby ensuring the working stability of the liquid pump and improving its ease of use. Of course, in other embodiments, the liquid outlet pipe portion 140 may not be provided.

[0064] Optionally, the volute portion 120, the mounting portion 130, and the liquid outlet pipe portion 140 are integrally formed. This simplifies the structure of the housing 100 and reduces assembly steps. Of course, in other embodiments, at least one of the volute portion 120, the mounting portion 130, and the liquid outlet pipe portion 140 may be formed as separate parts.

[0065] See also Figure 5 and Figure 6 Optionally, the housing 100 further includes a second bracket 150 provided at the liquid inlet 111, and the liquid pump further includes a mounting shaft 510 and a shaft sleeve 520. One end of the mounting shaft 510 is fixedly provided at the second bracket 150, and the other end is fixedly provided at the circuit substrate 211. The shaft sleeve 520 is rotatably sleeved on the outer circumferential surface of the mounting shaft 510 and is fixedly connected to the impeller 320. In this way, the impeller 320 rotates relative to the mounting shaft 510 through the shaft sleeve 520, which can not only improve the smoothness and stability of the rotation, but also reduce the wear rate of the impeller 320 or the mounting shaft 510, thereby facilitating the improvement of the service life of the liquid pump. Of course, in other embodiments, the shaft sleeve 520 may not be provided, and the mounting shaft 510 may be directly and movably provided on the impeller 320.

[0066] See also Figure 4 、 Figure 11 and Figure 12 Optionally, the pump impeller 300 includes a base 310 and an impeller 320 mounted on the base 310. The base 310 is provided with a mounting protrusion 311 projecting toward the liquid inlet 111. The mounting protrusion 311 is sleeved onto the outer circumference of the shaft sleeve 520, and the impeller 320 is disposed around the outer circumference of the mounting protrusion 311. In this manner, the inner circumference of the mounting protrusion 311 cooperates with the wall surface of the shaft sleeve 520, thereby enhancing the connection strength and installation reliability between the pump impeller 300 and the shaft sleeve 520. Of course, in other embodiments, the mounting protrusion 311 may be omitted.

[0067] See also Figure 4 、 Figure 11 and Figure 12 Optionally, the pump impeller 300 includes a base 310 and an impeller 320 mounted on the base 310. The axial flux motor 200 also includes a rotor magnet 220. The base 310 has a receiving groove 312 on its end surface near the circuit substrate 211, and the rotor magnet 220 is mounted within the receiving groove 312. That is, in this embodiment, the rotor structure includes the rotor magnet 220, which serves as the output end of the axial flux motor 200. This eliminates the need for special waterproofing of the rotor magnet 220, simplifying the production process of the liquid pump. The stator winding can directly drive the pump impeller 300 to rotate via the rotor magnet 220, eliminating the need for a drive shaft between the rotor magnet 220 and the pump impeller 300. Furthermore, the rotor magnet 220 is housed within the receiving groove 312, facilitating accurate installation of the rotor magnet 220 while effectively protecting it from damage.

[0068] Of course, in other embodiments, the axial flux motor 200 may further include a rotor core and a rotor winding wound around the rotor core. Alternatively, the axial flux motor 200 may further include a drive shaft connected between the rotor magnet 220 and the pump impeller 300 .

[0069] See also Figure 7 Optionally, the rotor magnet 220 is provided in an annular structure and extends along the circumference of the pump impeller 300, and the mounting groove 131 is also provided in an annular structure. This simplifies the structure of the rotor magnet 220 and facilitates its installation. Of course, in other embodiments, the rotor magnet 220 may include multiple separately provided sub-magnets, which are spaced apart and distributed along the circumference of the pump impeller 300; wherein the shapes of the sub-magnets include but are not limited to cylinders, prisms, or fan-shaped columns.

[0070] See also Figure 5 and Figure 6 In one embodiment, the circuit substrate 211 further defines a connection hole 214, and the liquid pump further includes a third bracket 420, through which the mounting shaft 510 is sealed and mounted on the connection hole 214. Optionally, the third bracket 420 may be configured as an elastic sealing plug or a threaded sleeve threadedly connected to the mounting shaft 510, which is not specifically limited in this application.

[0071] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A liquid pump with an axial flux motor, characterized in that include: The housing is provided with a pump liquid cavity, a liquid inlet and a liquid outlet communicating with the pump liquid cavity; An axial flux motor is provided in the housing; as well as The pump wheel is arranged in the pump fluid chamber and is drivingly connected to the output end of the axial flux motor.

2. The liquid pump having an axial flux motor according to claim 1, wherein: The axial flux motor includes a stator structure, wherein the stator structure includes a circuit substrate and a stator winding integrated on the circuit substrate, and the circuit substrate is connected to the housing.

3. The liquid pump having an axial flux motor according to claim 2, wherein: The housing includes a volute portion, the liquid inlet is arranged in the middle of the volute portion, the liquid outlet is arranged at the outer periphery of the volute portion, and the pump wheel is configured as a centrifugal impeller and is arranged in the volute portion.

4. The liquid pump having an axial flux motor according to claim 3, wherein: The volute portion has a first end face and a second end face distributed along the axial direction of the pump wheel. The liquid inlet is provided on the first end face, and the second end face is provided with a mounting opening. The circuit substrate is closely connected to the edge of the mounting opening. The circuit substrate and the volute portion jointly define the pump liquid chamber.

5. The liquid pump having an axial flux motor according to claim 4, wherein: The stator winding is arranged on an end surface of the circuit substrate away from the pump fluid chamber.

6. The liquid pump having an axial flux motor according to claim 4, wherein: The housing further includes a mounting portion provided on the second end surface, the mounting portion is provided with a mounting groove, the mounting opening passes through the bottom wall of the mounting groove, and the circuit substrate is at least partially accommodated in the mounting groove.

7. The liquid pump having an axial flux motor according to claim 6, wherein: The circuit substrate sealing cover is provided on the second end surface, the housing further comprising a first bracket, the first bracket being sleeved on the outer peripheral side of the circuit substrate, and the outer peripheral side of the first bracket abutting against the side wall of the mounting groove, the stator structure and the first bracket being sealed in the mounting groove by glue filling; And / or, the shell also includes a liquid outlet pipe portion connected to the outer periphery of the volute portion, the liquid outlet pipe portion includes a first pipe section and a second pipe section that intersect and communicate with each other, the water inlet end of the first pipe section is connected to the pump liquid cavity, the liquid outlet is formed at the water outlet end of the second pipe section, the second pipe section extends along the axial direction of the pump wheel and protrudes from the first end surface, and the volute portion, the mounting portion and the liquid outlet pipe portion are integrally formed.

8. The liquid pump having an axial flux motor according to claim 4, wherein: The liquid pump also includes a second bracket arranged at the liquid inlet, and the liquid pump also includes a mounting shaft and a shaft sleeve, one end of the mounting shaft is fixedly arranged on the second bracket, and the other end is fixedly arranged on the circuit substrate, and the shaft sleeve is rotatably sleeved on the outer circumferential surface of the mounting shaft and fixedly connected to the impeller.

9. The liquid pump having an axial flux motor according to claim 8, wherein: The pump wheel includes a base and an impeller arranged on the base. The base is provided with a mounting convex ring protruding toward the liquid inlet. The mounting convex ring is sleeved on the outer circumference of the shaft sleeve. The impeller is arranged around the outer circumference of the mounting convex ring.

10. The liquid pump having an axial flux motor according to claim 3, wherein: The pump wheel includes a base and an impeller arranged on the base, and the axial flux motor also includes a rotor magnet. The base is provided with a receiving groove on an end surface close to the circuit substrate, and the rotor magnet is arranged in the receiving groove; And / or, a ratio of the axial dimension to the radial dimension of the liquid pump is less than 0.7.

Images