CN117458772A - Liquid passing piece, shell, power device and vehicle - Google Patents

Abstract

The invention discloses a liquid passing piece, a machine shell, a power device and a vehicle, wherein the liquid passing piece comprises: the body is provided with liquid passing holes penetrating through two sides of the body; and the swirl structure is arranged on one side of the body, which is close to the liquid inlet end of the liquid passing hole, and is used for guiding the flowing liquid to form swirl and enter the liquid passing hole. When the liquid passing piece of the technical scheme is applied to the power device, the cooling effect on the electric device of the power device can be improved, and the service life of the power device is prolonged.

Description

Liquid passing piece, shell, power device and vehicle

The present application claims priority from chinese patent application No. 202310295844.2 entitled "liquid passing member, electronic water pump, and vehicle," filed 22 at 2023, 03, and 22, the entire contents of which are incorporated herein by reference.

Technical Field

The invention relates to the technical field of power devices, in particular to a liquid passing piece, a machine shell, a power device and a vehicle.

Background

Power devices such as electronic water pumps and driving motors are widely used in the industry. For example, the electronic water pump can be widely applied to cooling systems of conventional power and new energy vehicle types to provide power for circulation of cooling water in the cooling system so as to improve cooling efficiency of the cooling system. However, when the operation power of the power device is high, the heat productivity of the electric devices (such as the motor assembly and the electric control device) of the power device is very high, which easily causes the electric devices to be excessively heated to be invalid, and the service life of the power device is affected.

Disclosure of Invention

The invention mainly aims to provide a liquid passing piece which can improve the cooling effect on an electric device of a power device and prolong the service life of the power device when being applied to the power device.

In order to achieve the above object, the present invention provides a liquid passing member, comprising:

the body is provided with liquid passing holes penetrating through two sides of the body; and

the cyclone structure is arranged on one side of the body, which is close to the liquid inlet end of the liquid passing hole, and is used for guiding flowing-through liquid to form cyclone and enter the liquid passing hole.

In one embodiment, the body includes an end wall and an annular wall disposed at the periphery of the end wall and extending axially, the liquid passing hole is disposed at the end wall, the annular wall and the end wall together form a heat exchange cavity communicated with a liquid inlet end of the liquid passing hole, and the cyclone structure is disposed at one side of the body where the heat exchange cavity is disposed.

In one embodiment, the cyclone structure comprises a flow guiding channel arranged in the annular wall, the flow guiding channel extends between the outer peripheral surface and the inner peripheral surface of the annular wall, the flow guiding channel is provided with an input port and an output port penetrating through the inner peripheral surface of the annular wall, and the extending direction of the flow guiding channel and the radial direction of the annular wall form an included angle.

In one embodiment, the end face of the annular wall facing the end wall is formed with the flow guide channel.

In one embodiment, the central line of the input port and the axis of the annular wall are respectively projected to the same projection plane along the axial direction of the annular wall, and the projection connecting line of the central line of the input port and the axis of the annular wall and the projection connecting line of the central line of the annular wall and the axis of the annular wall form a first included angle with the extending direction of the diversion channel, and the first included angle is an acute angle.

In one embodiment, the first included angle is alpha, wherein 0 DEG < alpha < 70 deg.

In one embodiment, the flow guiding channel is provided with two side groove walls which are oppositely arranged in the circumferential direction of the annular wall, the two side groove walls are arranged at a second included angle, and the distance between the two side groove walls is gradually widened in the direction approaching to the output port.

In one embodiment, the second included angle is beta, wherein 0 DEG < beta < 20 deg.

In one embodiment, the annular wall is provided with at least two of the flow guide channels at intervals in the circumferential direction.

In one embodiment, the cyclone structure comprises a flow guiding rib arranged in the heat exchange cavity, and the flow guiding rib extends from the annular wall towards the liquid passing hole and at least partially surrounds the periphery of the liquid passing hole.

In one embodiment, the flow guiding rib comprises a first rib section and a second rib section which are connected, the first rib section extends from one side close to the annular wall to be tangent to the periphery of the liquid passing hole, the second rib section is partially enclosed on the periphery of the liquid inlet end of the liquid passing hole, the central line of the liquid passing hole and the axis of the annular wall are respectively projected to the same projection surface along the axial direction of the annular wall, and an included angle is formed between a projection connecting line of the first rib section and the third extending direction of the first rib section.

In one embodiment, the third included angle is gamma, wherein 15 deg. gamma.ltoreq.75 deg..

In one embodiment, the cross section of the guide rib in the vertical extending direction is triangular, trapezoidal or elliptical.

In one embodiment, the guide ribs and the liquid passing holes are respectively arranged in a plurality, the guide ribs are arranged at intervals along the circumferential direction of the end wall, the liquid passing holes are arranged at intervals along the circumferential direction of the end wall, and the guide ribs and the liquid passing holes are arranged in a one-to-one correspondence.

In one embodiment, a groove is formed in a surface of the end wall, facing the heat exchange cavity, and the inner diameter of the groove is smaller than that of the annular wall, so that a step surface is formed at a position of the end wall corresponding to the inner periphery of the groove, and the liquid passing hole and the flow guide rib are located in the groove.

In one embodiment, the liquid passing hole is arranged at the bottom of the groove and is adjacent to the inner peripheral surface of the groove, and the flow guiding rib extends from the inner peripheral surface of the groove to the bottom of the groove and is arranged around the periphery of the liquid passing hole.

In one embodiment, the inner peripheral surface of the groove is provided with a tapered surface tapering toward a side facing away from the step surface.

In one embodiment, the taper angle of the diversion cone is θ, where 0 ° < θ+.ltoreq.30°.

In one embodiment, the liquid passing hole is provided with a diversion conical surface, and the diversion conical surface is gradually reduced from the liquid inlet end to the liquid outlet end of the liquid passing hole.

The invention also provides a shell which comprises the liquid passing piece.

In one embodiment, the casing includes a main casing provided with a motor cavity, the liquid passing member is disposed on the main casing and adjacent to the motor cavity, and a liquid outlet end of the liquid passing hole is communicated with the motor cavity.

In one embodiment, the casing further comprises a heat conducting plate, the heat conducting plate is arranged on one side of the liquid passing piece, which is provided with the cyclone structure, and one side of the heat conducting plate, which is away from the cyclone structure, is used for installing the electric control.

In one embodiment, the liquid passing member is integrally formed with the main housing.

The invention also provides a power device which comprises the shell and a motor component arranged in the shell.

In one embodiment, the motor assembly comprises a main shaft fixed on the casing, a rotor sleeved on the main shaft, and a stator surrounding the periphery of the rotor, wherein the main shaft and the rotor are accommodated in a motor cavity of the casing, and the stator is molded in a wall of the casing.

In one embodiment, one end of the spindle is overmolded into a wall of the housing.

In one embodiment, a liquid inlet channel is arranged in the wall of the casing, the liquid inlet channel is communicated with the liquid through hole through the rotational flow structure, and a liquid outlet channel communicated with the liquid through hole is formed by a gap between the rotor and the casing and/or a gap between the main shaft and the rotor.

In one embodiment, the power device is an electronic water pump, the power device further comprises a pump shell and a pump body, the pump shell is connected with the shell, the pump shell is configured to accommodate a pump body cavity of the pump body, the pump shell is provided with a liquid inlet and a liquid outlet which are communicated with the pump body cavity, a liquid inlet end of the liquid inlet channel is communicated with the pump body cavity, a liquid outlet end of the liquid outlet channel is communicated with the pump body cavity, and the pump body is connected with the rotor.

In one embodiment, at least one of the outer peripheral surface of the rotor, the inner peripheral surface of the casing, the outer peripheral surface of the main shaft, and the inner peripheral surface of the rotor is provided with a flow channel groove, one end of the flow channel groove is communicated with the liquid passing hole, and the other end of the flow channel groove is communicated with the pump body cavity.

The invention also provides a vehicle comprising the power device.

According to the technical scheme, when the cooling liquid flows through the liquid piece, the rotational flow can be formed under the action of the rotational flow structure, so that the time of the cooling liquid flowing through the liquid piece is prolonged, the cooling liquid can exchange heat with a component to be cooled sufficiently, and the cooling liquid can absorb heat of the related component. Moreover, due to the formation of rotational flow, the speed of the cooling liquid is considerable, the flowing power of the cooling liquid can be ensured, the cooling liquid subjected to heat exchange flows out of the liquid passing piece through the liquid passing hole, new cooling liquid continuously flows into the liquid passing piece under the action of pressure, the cooling liquid at the liquid passing piece is ensured to be updated in time, and the cooling liquid has enough heat absorption capacity, so that the cooling effect of the cooling liquid on related components is further improved. When the liquid passing piece is applied to the power device, the liquid passing piece is arranged adjacent to the electric device of the power device, so that the cooling effect on the electric device of the power device can be effectively improved, and the service life of the power device is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a liquid passing member according to the present invention;

FIG. 2 is a schematic view of a first cross-sectional structure of the liquid passing member of FIG. 1;

FIG. 3 is a schematic view of a second cross-sectional structure of the liquid passing member of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the deflector rib of FIG. 3 perpendicular to its extension;

FIG. 5 is a schematic view of an embodiment of a housing according to the present invention;

FIG. 6 is a schematic cross-sectional view of the housing of FIG. 5;

FIG. 7 is a schematic diagram of the cooperation structure between the main housing and the liquid passing member in FIG. 5;

FIG. 8 is a schematic view of the main housing and the liquid passing member in FIG. 7 from another view;

FIG. 9 is a schematic cross-sectional view of the combination of the main housing and the liquid passing member in FIG. 8;

FIG. 10 is a schematic view of the heat conductive plate of FIG. 6;

FIG. 11 is a schematic view of an embodiment of a power plant according to the present invention;

FIG. 12 is an exploded view of the power plant of FIG. 11;

FIG. 13 is a schematic cross-sectional view of the power plant of FIG. 11;

FIG. 14 is a schematic view of the cooling fluid flow within the power plant of FIG. 13;

FIG. 15 is a schematic view of an assembled structure of the rotor and pump body of FIG. 12;

fig. 16 is a schematic cross-sectional view of the assembled structure of the rotor and the pump body in fig. 15.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present invention, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The present invention proposes a liquid passing member 10.

Referring to fig. 1 and 2, in an embodiment of the present invention, the liquid passing member 10 includes a main body 11 and a cyclone structure 12, wherein the main body 11 is provided with a liquid passing hole 101 penetrating through two sides of the main body 11; the cyclone structure 12 is disposed on a side of the body 11 near the liquid inlet end of the liquid passing hole 101, and the cyclone structure 12 is used for guiding the flowing liquid to form a cyclone and enter the liquid passing hole 101.

In particular, the liquid passing member 10 may be used in a device provided with a cooling system, and in use, the liquid passing member 10 may be disposed in a cooling liquid flow path of the cooling system, and the liquid passing member 10 may be disposed adjacent to a member to be cooled (e.g., the motor assembly 30, the electric control member 60, the electric power source member, etc.). The cooling liquid can be guided to the liquid inlet end of the liquid passing hole 101 through the cyclone structure 12 arranged on one side of the body 11, and finally flows out of the liquid passing hole 101, and the flowing cooling liquid can generate cyclone through the cyclone structure 12. In practical applications, the liquid passing member 10 may be assembled to other carriers (e.g. the casing 20) through the body 11, or the body 11 of the liquid passing member 10 may be integrally formed to the carrier (e.g. the casing 20). The swirling structure 12 includes, but is not limited to, a diversion channel 121, a diversion rib 122, a diversion plate, a spiral structure, and the like, and guides the cooling liquid so as to form swirling flow. The number of stages of the cyclone structure 12 may be set as required, and may be, for example, a single-stage cyclone structure, a two-stage cyclone structure, or a multi-stage cyclone structure, which is not particularly limited herein.

As shown in fig. 6 and 11, when the liquid passing member 10 is used in a power plant 100 (e.g., an electronic water pump or a liquid cooled motor), the liquid passing member 10 may be disposed on the housing 20 of the power plant 100, and the liquid passing member 10 may be disposed adjacent to the motor chamber 211 and/or the electronic control chamber 241 of the housing 20. Wherein the motor cavity 211 of the housing 20 is configured to at least partially house the motor assembly 30, and the electrical control cavity 241 is configured to house the electrical control member 60. When the liquid passing member 10 is arranged adjacent to the motor cavity 211, the cooling liquid flow can generate rotational flow when passing through the liquid passing member 10, so that the retention time of the cooling liquid at the liquid passing member 10 is prolonged, the cooling liquid in the liquid passing member 10 can fully exchange heat with the motor assembly 30 in the motor cavity 211, and the cooling effect on the motor assembly 30 is improved. When the liquid passing piece 10 is arranged adjacent to the electric control cavity 241, the cooling liquid flow can generate rotational flow when passing through the liquid passing piece 10, so that the retention time of the cooling liquid at the liquid passing piece 10 is prolonged, the cooling liquid in the liquid passing piece 10 can fully exchange heat with the electric control piece 60 in the electric control cavity 241, and the cooling effect on the electric control piece 60 is improved. Optionally, the liquid passing member 10 is disposed between the motor cavity 211 and the electric control cavity 241, and generates a rotational flow when the coolant flows through the liquid passing member 10, so that the coolant can exchange heat with the motor assembly 30 and the electric control member 60 sufficiently, thereby improving the cooling effect of the motor assembly 30 and the electric control member 60.

In the technical scheme of the invention, when the cooling liquid passes through the liquid piece 10, the rotational flow can be formed under the action of the rotational flow structure 12, so that the time of the cooling liquid passing through the liquid piece 10 is prolonged, the cooling liquid can exchange heat with the components to be cooled sufficiently, and the cooling liquid can absorb the heat of the related components. Moreover, due to the formation of the rotational flow, the speed of the cooling liquid is considerable, the flowing power of the cooling liquid can be ensured, the cooling liquid subjected to heat exchange flows out of the liquid passing piece 10 through the liquid passing hole 101, new cooling liquid continuously flows into the liquid passing piece 10 under the action of pressure, the cooling liquid at the position of the liquid passing piece 10 is ensured to be updated in time, and the cooling liquid has enough heat absorption capacity, so that the cooling effect of the cooling liquid on related components is further improved. When the liquid passing member 10 is applied to the power device 100, the liquid passing member 10 is arranged adjacent to the electric device of the power device 100, so that the cooling effect on the electric device of the power device 100 can be effectively improved, and the service life of the power device 100 is prolonged.

Referring to fig. 1 and 2, in one embodiment, the body 11 includes an end wall 111 and an annular wall 112 disposed at a periphery of the end wall 111 and extending along an axial direction, the liquid passing hole 101 is disposed at the end wall 111, the annular wall 112 and the end wall 111 together form a heat exchange cavity 102 communicating with a liquid inlet end of the liquid passing hole 101, and the cyclone structure 12 is disposed at a side of the body 11 where the heat exchange cavity 102 is disposed. In this way, the cooling liquid can be collected and reserved in the heat exchange cavity 102 by the rotational flow generated by the rotational flow structure 12, and then is conveyed to the liquid passing hole 101 for output by the heat exchange cavity 102, so that the retention time of the cooling liquid can be further prolonged, and the cooling effect on peripheral electric devices caused by the liquid passing can be further improved.

As shown in fig. 1 to 3, in one embodiment, the swirl structure 12 includes a flow guiding channel 121 disposed in the annular wall 112, the flow guiding channel 121 extends between an outer peripheral surface and an inner peripheral surface of the annular wall 112, the flow guiding channel 121 has an input port 1212 and an output port 1211 penetrating through the inner peripheral surface of the annular wall 112, and the extending direction of the flow guiding channel 121 is disposed at an angle with respect to a radial direction of the annular wall 112.

In this embodiment, the input port 1212 of the diversion channel 121 may be used to communicate with the cooling liquid inlet channel 212 of the cooling system, and the cooling liquid enters the diversion channel 121 through the input port 1212 and then is emitted into the heat exchange cavity 102 through the output port 1211 of the diversion channel 121. The input port 1212 may be provided on the outer peripheral surface of the annular wall 112 or on the end surface of the annular wall 112. The output port 1211 of the flow guiding channel 121 is located on the inner peripheral surface of the annular wall 112, and because the extending direction of the flow guiding channel 121 and the radial direction of the annular wall 112 have a certain included angle, the cooling liquid flowing out from the flow guiding channel 121 has components in the radial direction and the tangential direction of the annular wall 112, and under the guidance of the flow guiding channel 121, the cooling liquid can gradually flow towards the center of the heat exchange cavity 102 along the inner peripheral surface of the annular wall 112 after being output from the liquid outlet end of the flow guiding channel 121, thereby forming a rotational flow, so that the residence time of the cooling liquid in the heat exchange cavity 102 can be prolonged, and the cooling effect is improved.

Optionally, the end surface of the annular wall 112 facing the end wall 111 is formed with the flow guiding channel 121. For example, the annular wall 112 and the end wall 111 may be assembled in a separate structure, and during the machining, the flow guide channel 121 may be machined on the end surface of the annular wall 112, and then the end wall 111 may be assembled on the end surface of the annular wall 112 where the flow guide channel 121 is provided. Alternatively, the annular wall 112 may be integrally formed with the end wall 111, and the diversion channel 121 may be formed at a portion where the end surface of the annular wall 112 contacts the end wall 111 during forming.

Further, as shown in fig. 3, the center line of the input port 1212 and the axis of the annular wall 112 are projected onto the same projection plane along the axial direction of the annular wall 112, respectively, and the projection connecting line of the two is disposed at a first included angle with the extending direction of the flow guiding channel 121, and the first included angle is an acute angle.

In this embodiment, the cooling liquid flows into the diversion channel 121 through the input port 1212, and then flows out from the inner periphery side of the annular wall 112 through the diversion channel 121, and the first included angle α is an acute angle, that is, the first included angle α is greater than 0 degrees and smaller than 90 degrees, so that the velocity of the cooling liquid has a component in the radial direction of the annular wall 112 to enable the cooling liquid to flow toward the center of the annular wall 112, and at the same time, the velocity of the cooling liquid has a component in the tangential direction of the annular wall 112 to enable the cooling liquid to have a tendency to flow along the inner periphery of the annular wall 112, thereby forming a rotational flow to ensure the cooling effect of the cooling liquid. Optionally, the first included angle is α, wherein 0 ° < α+.ltoreq.70°. The first included angle alpha is set to be an acute angle smaller than 70 degrees, so that the rotational flow effect can be guaranteed, and the flowing time of the cooling liquid in the heat exchange cavity 102 can be effectively prolonged, so that the cooling effect of the cooling liquid can be guaranteed.

Further, as shown in fig. 3, the flow guiding channel 121 has two side groove walls disposed opposite to each other in the circumferential direction of the annular wall 112, where the two side groove walls are disposed at a second included angle, and the intervals between the two side groove walls are disposed gradually expanding in a direction approaching the output port 1211. In this embodiment, after the cooling liquid flows through the diverging diversion channel 121, the flow speed will be increased, so that the heat convection coefficient between the cooling liquid and the electrical device can be increased, so as to further increase the heat absorption effect of the cooling liquid, and further ensure the cooling effect of the cooling liquid on the electrical device. Optionally, the second included angle is beta, wherein 0 ° < beta is less than or equal to 20 °. The angular bisector of the second included angle β is the extending direction of the flow guiding channel 121, and the second included angle β is set to an acute angle smaller than 20 degrees, so that the cooling liquid can be ejected from the output port 1211 at a higher flow velocity, and meanwhile, the cooling liquid ejected through the flow guiding channel 121 can be guaranteed to generate a better rotational flow effect, so that the cooling effect of the cooling liquid on the electric device is further improved.

To further enhance the swirling effect of the cooling liquid, in one embodiment, the annular wall 112 is provided with at least two flow guiding channels 121 at intervals along the circumferential direction. Thus, a plurality of swirls in the same direction can be formed through the plurality of diversion channels 121, the swirls can be overlapped into more severe swirls without mutual reduction, and the swirls can rotate along the inner periphery of the annular wall 112, thereby being beneficial to guaranteeing the swirling effect and improving the cooling effect of the cooling liquid.

As shown in fig. 1 to 3, in one embodiment, the cyclone structure 12 includes a flow guiding rib 122 disposed in the heat exchange cavity 102, where the flow guiding rib 122 extends from the annular wall 112 toward the liquid passing hole 101 and at least partially surrounds the periphery of the liquid passing hole 101. In this way, the cooling liquid forms a swirl flow under the action of the guide ribs 122, and is guided into the liquid passing holes 101 through the guide ribs 122. As shown in fig. 4, the cross-sectional shape of the guide rib 122 in the direction perpendicular to the extending direction thereof may be triangular, trapezoidal, oval or other shaped structures, etc.

Further, as shown in fig. 3, the flow guiding rib 122 includes a first rib section 1221 and a second rib section 1222 that are connected, the first rib section 1221 extends from a side close to the annular wall 112 to be tangent to the periphery of the liquid passing hole 101, the second rib section 1222 is partially enclosed on the periphery of the liquid inlet end of the liquid passing hole 101, the center line of the liquid passing hole 101 and the axis of the annular wall 112 are respectively projected onto the same projection plane along the axial direction of the annular wall 112, and the projection connecting line of the two is set at a third included angle with the extending direction of the first rib section 1221. In this way, the coolant can be guided to the periphery of the via 101 by the first rib 1221 and can be rotated around the periphery of the via 101 under the guidance of the second rib 1222 to finally be screwed into the via 101 to form a swirl flow. Of course, in other embodiments, a segment of the flow guiding rib 122 that is arc-shaped and tangential to the liquid passing hole 101 may be provided, and the cooling liquid can be guided to form a rotational flow to be screwed into the liquid passing hole 101. Optionally, the third included angle γ is an acute angle, that is, the included angle between the extending direction of the first rib section 1221 and the radial direction of the annular wall 112 is greater than 0 and less than 90 degrees, which can facilitate the first rib section 1221 to introduce the primary rotational flow and promote the formation of the secondary rotational flow. Optionally, the third included angle is γ, wherein 15 ° is no more than γ is no more than 75 °. The third included angle γ is preferably an acute angle ranging from 15 degrees to 75 degrees, and the third included angle γ in this range can enable the first rib section 1221 to have a better flow guiding effect.

Further, the plurality of guide ribs 122 and the plurality of liquid passing holes 101 are respectively provided, the plurality of guide ribs 122 are arranged along the circumferential direction of the end wall 111 at intervals, the plurality of liquid passing holes 101 are arranged along the circumferential direction of the end wall 111 at intervals, and the guide ribs 122 are arranged in one-to-one correspondence with the liquid passing holes 101. In this embodiment, a plurality of rotational flows can be formed through the plurality of flow guide ribs 122, and meanwhile, the plurality of liquid passing holes 101 can increase the flow quantity of the cooling liquid, so that the cooling liquid in the heat exchange cavity 102 can be caused to flow out from the liquid passing holes 101, and the cooling effect is reduced due to the fact that the cooling liquid is excessively stopped in the heat exchange cavity 102 and the cooling effect is reduced due to the fact that the cooling liquid is excessively high in temperature rise, and meanwhile, the cooling liquid with a new lower temperature can be continuously supplemented into the heat exchange cavity 102, and the cooling effect is guaranteed. In addition, the plurality of swirl flow is formed by the plurality of flow guide ribs 122, so that the cooling liquid in the heat exchange cavity 102 can be uniformly distributed, and even heat exchange with adjacent electric devices can be realized, and even cooling is realized. The number of the guide ribs 122 and the liquid passing holes 101 can be set according to needs, and optionally, the plurality of guide ribs 122 and the plurality of liquid passing holes 101 are uniformly distributed in the circumferential direction of the end wall 111, so that heat exchange uniformity is further ensured.

In some embodiments, the cyclone structure 12 includes a diversion channel 121 disposed in the annular wall 112 and a diversion rib 122 disposed on the end wall 111, so that the cooling liquid can form a first-stage cyclone under the action of the diversion channel 121, and a second-stage cyclone is formed under the action of the diversion rib 122 after the first-stage cyclone enters the heat exchange cavity 102, so that the residence time of the cooling liquid in the heat exchange cavity 102 can be further prolonged by the two-stage cyclone, and the cooling effect is further improved.

In one embodiment, a groove 103 is formed on a surface of the end wall 111 facing the heat exchange cavity 102, an inner diameter of the groove 103 is smaller than an inner diameter of the annular wall 112, so that a step surface 111a is formed at a position of the end wall 111 corresponding to an inner periphery of the groove 103, and the liquid passing hole 101 and the flow guiding rib 122 are located in the groove 103. In this way, swirling cooling liquid is allowed to collect in the recess 103 and be output via the liquid via 101 to the side of the end wall 111 facing away from the recess 103. The inner diameter of the groove 103 is smaller, more due to the formation of a swirl; and the wall thickness of the part of the end wall 111 provided with the groove 103 is thinner, which is more beneficial to the heat exchange between the rotational flow cooling liquid in the groove 103 and the peripheral components so as to further improve the cooling effect.

In some embodiments, the cyclone structure 12 includes a diversion channel 121 disposed in the annular wall 112 and a diversion rib 122 disposed on the end wall 111, where the diversion channel 121 is located on a side of the step surface 111a away from the bottom of the groove 103, so that the primary cyclone ejected from the diversion channel 121 can flow into the groove 103 along the inner peripheral surface of the groove 103 via the step surface 111a to be collected, and form a secondary cyclone under the action of the diversion rib 122, so as to further enhance the cooling effect.

In one embodiment, the liquid passing hole 101 is disposed at the bottom of the groove 103 and adjacent to the inner peripheral surface of the groove 103, and the flow guiding rib 122 extends from the inner peripheral surface of the groove 103 to the bottom of the groove 103 and surrounds the periphery of the liquid passing hole 101. In this way, the cooling liquid in the heat exchange cavity 102 is guided and conveyed to the liquid passing hole 103 by the guide rib 122; and a part of the guide rib 122 is connected with the inner peripheral surface of the groove 103, and the other part is connected with the bottom of the groove 103, so that the guide rib 122 can play a role in structural reinforcement, and deformation caused by too thin thickness of the bottom of the groove 103 is avoided.

In order to be able to better guide the cooling liquid to collect in the groove 103, further, the inner circumferential surface of the groove 103 is provided with a tapered surface tapering toward the side facing away from the step surface 111 a. In some embodiments, the cyclone structure 12 includes a flow guiding channel 121 disposed in the annular wall 112, and a flow guiding rib 122 disposed on the end wall 111, where the flow guiding channel 121 is located on a side of the step surface 111a away from the bottom of the groove 103, and since the inner peripheral surface of the groove 103 is disposed with a tapered surface tapering toward a side away from the step surface 111a, the primary cyclone ejected from the flow guiding channel 121 can be collected into the groove 103 along the tapered inner peripheral surface of the groove 103 after passing through the step surface 111a, which is more beneficial to the formation of the cyclone.

On the basis of the above embodiment, as shown in fig. 2, in an embodiment, the liquid passing hole 101 has a guiding conical surface, and the guiding conical surface is gradually tapered from the liquid inlet end toward the liquid outlet end of the liquid passing hole 101. Thus, the swirling effect of the cooling liquid can be further improved through the diversion cone, and the diversion cone can guide the cooling liquid to flow upwards. Optionally, the taper angle of the diversion cone is θ, where θ is more than 0 ° and less than or equal to 30 °, so that the forming of the liquid passing hole 101 on the body 11 is facilitated while the effect of the diversion cone is ensured.

Referring to fig. 5 and fig. 6, the present invention further provides a casing 20, where the casing 20 includes a liquid passing member 10, and the specific structure of the liquid passing member 10 refers to the above embodiment, and since the casing 20 adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, which are not described herein again.

The liquid passing member 10 may be mounted on the main casing 21 of the casing 20 as a separate member, or the liquid passing member 10 may be integrally formed on the main casing 21 of the casing 20. In order to be able to cool down the electrical devices in the housing 20, the liquid passing member 10 is arranged adjacent to the electrical devices. For example, the liquid passing member 10 may be disposed adjacent to the motor cavity 211 and/or the electrical control cavity 241 of the housing 20 to cool the motor assembly 30 within the motor cavity 211 and/or the electrical control 60 within the electrical control cavity 241.

In one embodiment, as shown in fig. 6, the housing 20 includes a main housing 21 provided with a motor cavity 211, the liquid passing member 10 is disposed in the main housing 21 and adjacent to the motor cavity 211, and the liquid outlet end of the liquid passing hole 101 is communicated with the motor cavity 211. In this way, the cooling liquid can cool down with the motor assembly 30 in the adjacent motor cavity 211 when passing through the liquid member 10, and the cooling liquid generates a rotational flow under the action of the rotational flow structure 12, so that the residence time of the cooling liquid at the liquid member 10 can be prolonged, and the cooling liquid and the motor assembly 30 can exchange heat fully. Meanwhile, since the liquid outlet end of the liquid passing hole 101 is communicated with the motor cavity 211, the formed cooling liquid rotational flow can enter the motor cavity 211 through the liquid passing hole 101, so that the cooling liquid can be in direct contact with the surface of the motor assembly 30 in the motor cavity 211 for heat exchange, and the cooling liquid after heat exchange can continue to flow upwards until flowing out of the motor cavity 211, and therefore the cooling liquid flow channel can continuously convey new cooling liquid with lower temperature to the liquid passing piece 10, and the cooling effect of the cooling liquid on the motor assembly 30 is further improved.

As shown in fig. 6, in an embodiment, the main housing 21 includes a bottom wall and a peripheral wall extending upward from a periphery of the bottom wall, the bottom wall and the peripheral wall enclose to form the motor cavity 211, the liquid passing member 10 is disposed on a side of the bottom wall facing away from the motor cavity 211, and the liquid outlet end of the liquid passing hole 101 penetrates through the bottom wall. In this way, the cooling fluid can be delivered into the motor cavity 211 through the fluid passing holes 101 after the cooling fluid passes through the fluid piece 10 to form a rotational flow. Referring to fig. 2 and 6, in some embodiments, the liquid passing member 10 includes a body 11, where the body 11 includes an end wall 111 and an annular wall 112, and the end wall 111 is disposed on a side of the bottom wall of the main housing 21 facing away from the motor cavity 211, and the annular wall 112 extends from a periphery of the end wall 111 toward a side facing away from the motor cavity 211, and the annular wall 112 and the end wall 111 enclose to form the heat exchange cavity 102. Alternatively, the end wall 111 is integrally formed with the bottom wall, or the end wall 111 configures the bottom wall of the main housing 21.

As shown in fig. 6 and 13, in one embodiment, the casing 20 further includes a heat conducting plate 22, where the heat conducting plate 22 is disposed on a side of the liquid passing member 10 where the cyclone structure 12 is disposed, and a side of the heat conducting plate 22 facing away from the cyclone structure 12 is used for mounting the electrical control 60. In this way, when the cooling liquid flows through the liquid component 10, the cooling liquid can cool the motor assembly 30 in the motor cavity 211, and meanwhile, the heat generated by the electric control component 60 can be transferred to the cooling liquid in the liquid component 10 through the heat conducting plate 22, so that the cooling of the electric control component 60 is realized.

To further improve the cooling efficiency of the electric control unit 60, in one embodiment, a heat dissipation structure is disposed on a side of the heat conducting plate 22 facing the cyclone structure 12. Through being equipped with heat radiation structure at heat conduction board 22, can promote heat radiating effect of heat conduction board 22 to promote the heat transfer rate of electric control piece 60 and coolant liquid, make electric control piece 60 can cool down more fast. There are various specific forms of heat dissipating structure including, but not limited to, heat dissipating ribs 221, heat dissipating fins, and the like.

As shown in fig. 10, in one embodiment, the heat dissipating structure includes at least one set of heat dissipating ribs, where the set of heat dissipating ribs includes a plurality of heat dissipating ribs 221 arranged at intervals along a circumferential direction of the heat conducting plate 22, each of the heat dissipating ribs 221 has a first end disposed near a center of the heat conducting plate 22, and a second end disposed near an outer periphery of the heat conducting plate 22, and an extending direction of each of the heat dissipating ribs 221 is disposed at an angle to a radial direction of the heat conducting plate 22, and in the same set of heat dissipating ribs, the second ends of each of the heat dissipating ribs 221 are rotationally offset toward the same side.

In this embodiment, the plurality of heat dissipating ribs 221 are arranged along the circumferential direction of the heat conducting plate 22 at intervals to form a heat dissipating rib group, so that the contact area between the cooling liquid and the heat conducting plate 22 can be increased, heat transfer is accelerated, heat dissipation effect is improved, and cooling efficiency of the electric control part 60 is further improved. Meanwhile, the heat dissipation ribs 221 can also play a role of reinforcing ribs, so that the overall structural strength of the heat conduction plate 22 is improved, the thickness of the heat conduction plate 22 can be made relatively thin, and good heat conduction performance can be ensured while the installation stability of the electric control 60 is ensured. In the same group of heat conducting ribs in the circumferential direction of the heat conducting plate 22, the extending direction of each heat dissipating rib 221 is set at an included angle with the radial direction of the heat conducting plate 22, and the second ends of the heat dissipating ribs 221 are rotationally offset towards the same side relative to the first ends of the heat dissipating ribs 221, so that the heat conducting ribs are integrally provided with a certain rotation direction.

In order to further enhance the heat dissipation effect and the structural strength, as shown in fig. 10, in one embodiment, the heat dissipation structure further includes a first annular rib 222 and a second annular rib 223, at least one of the heat dissipation rib groups is located between the first annular rib 222 and the second annular rib 223, in the heat dissipation rib group, a first end of each of the heat dissipation ribs 221 is connected to the first annular rib 222, and a second end of each of the heat dissipation ribs 221 is connected to the second annular rib 223.

Further, the heat dissipation rib groups are provided with at least two groups, each group of heat dissipation rib groups is arranged along the radial direction of the heat conduction plate 22, and the heat dissipation ribs 221 of two adjacent groups of heat dissipation rib groups are arranged in a staggered manner along the circumferential direction of the heat conduction plate 22. Thus, the number of the heat dissipating ribs 221 can be further increased, and the heat dissipating effect can be improved. And, the radiating ribs 221 of two adjacent radiating rib groups are arranged in a staggered manner in the circumferential direction of the heat conducting plate 22, so that the plurality of radiating ribs 221 of the radiating rib group of the outer ring are arranged relatively densely, and the plurality of radiating ribs 221 of the radiating rib group of the inner ring are arranged relatively sparsely, so that the heat radiating effect is ensured, and meanwhile, the material can be saved, and the cost is reduced.

In order to facilitate the installation of the heat conducting plate 22 and the housing body 11, as shown in fig. 10, in one embodiment, at least two assembling portions 224 are circumferentially spaced apart from the heat conducting plate 22, at least two assembling positions are circumferentially spaced apart from the liquid passing member 10, and the assembling portions 224 are assembled to the assembling positions in a one-to-one correspondence. The mounting manner between the mounting portion 224 and the mounting position includes, but is not limited to, snap connection, screw connection, hot riveting, and the like. The number of the assembling parts 224 in the circumferential direction of the heat conducting plate 22 can be set according to actual needs, and the number of the assembling positions on the liquid passing member 10 is matched with the number of the assembling parts 224. In order to further secure the assembly stability, the heat conductive plate 22 is provided with a plurality of assembling portions 224 along the circumferential direction, and the plurality of assembling portions 224 are uniformly arranged at intervals along the circumferential direction of the heat conductive plate 22.

In order to simplify the assembly process while ensuring assembly reliability, in one embodiment, the assembly portion 224 and the assembly site are heat staked. For example, in the present embodiment, the fitting portion 224 is provided with a caulking hole, and the fitting position is provided with a caulking post, and the caulking post is inserted into the caulking hole to be fixedly connected by a hot caulking process at the time of fitting.

As shown in fig. 6, in one embodiment, the casing 20 further includes a sealing member 23 disposed at a connection portion between the heat conducting plate 22 and the liquid passing member 10, so that the cooling liquid in the liquid passing member 10 can be prevented from leaking to the area where the electric control member 60 is located through a gap between the heat conducting plate 22 and the liquid passing member 10, and the safety of the electric control member 60 can be ensured. In a specific embodiment, the heat-conducting plate 22 is disposed in a cavity formed by the annular wall 112 of the body 11, the sealing member 23 is sleeved on the outer periphery of the heat-conducting plate 22, and the outer periphery of the heat-conducting plate 22 is in sealing connection with the inner periphery of the annular wall 112 through the sealing member 23. Optionally, a sealing groove for accommodating the sealing member 23 is provided on the outer periphery of the heat conducting plate 22.

In one embodiment, as shown in fig. 6, the casing 20 further includes an end cover 24, the end cover 24 is disposed on a side of the heat conducting plate 22 facing away from the cyclone structure 12, and an electric control chamber 241 for accommodating the electric control member 60 is configured between the end cover 24 and the heat conducting plate 22. The electrical control member 60 may be shielded by the provision of the end cap 24, wherein the assembly between the end cap 24 and the flow member 10 may include, but is not limited to, a snap fit connection, a screw connection, a weld, etc. Optionally, the end cap 24 is welded to the liquid passing member 10 to improve the sealing and waterproof level. To facilitate connection of the electrical control 60 to external circuitry, the end cap 24 is optionally provided with a via 242, and the terminals of the electrical control 60 may be connected to external circuitry via the via 242.

In order to simplify the manufacturing process and ensure structural strength, as shown in fig. 7 to 9, in one embodiment, the liquid passing member 10 is integrally formed with the main housing 21. Specifically, the main housing 21 and the liquid passing member 10 may be integrally injection-molded by an injection molding process.

Referring to fig. 11 to 14, the present invention further provides a power device 100, which includes a housing 20 and a motor assembly 30 disposed in the housing 20. The specific structure of the casing 20 refers to the above embodiment, and since the power device 100 adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein. The power device 100 includes, but is not limited to, an electronic water pump, a liquid-cooled motor, and the like.

As shown in fig. 12 and 13, in one embodiment, the motor assembly 30 includes a main shaft 31 fixed to the housing 20, a rotor 32 sleeved on the main shaft 31, and a stator 33 surrounding the rotor 32, where the main shaft 31 and the rotor 32 are accommodated in the motor cavity 211, and the stator 33 is overmolded in a wall of the main housing 21. In this way, the stator 33 is molded into the wall of the main housing 21 by injection molding, so that the assembly process of the motor assembly 30 can be simplified, and the stator 33 can be well protected. To further simplify the assembly process of the motor assembly 30, one end of the main shaft 31 is optionally overmolded to the main housing 21. Therefore, during assembly, only the rotor 32 is required to be assembled on the main shaft 31, the assembly is simple and convenient, and the assembly efficiency can be improved.

Referring to fig. 13 and 14, in one embodiment, a liquid inlet channel 212 is disposed in a wall of the housing 20, the liquid inlet channel 212 communicates with the liquid passing hole 101 via the cyclone structure 12, and a gap between the rotor 32 and the housing 20 and/or a gap between the spindle 31 and the rotor 32 forms a liquid outlet channel 213 communicating with the liquid passing hole 101. In this way, the cooling liquid is conveyed to the rotational flow structure 12 through the liquid inlet channel 212, the rotational flow is generated by the rotational flow structure 12 and conveyed to the liquid passing hole 101, and then the cooling liquid enters the motor cavity 211, and the cooling liquid in the motor cavity 211 flows back upwards through the liquid outlet channel 213 formed by the gap between the rotor 32 and the casing 20 and/or the gap between the main shaft 31 and the rotor 32, so that a cooling liquid circulation flow path is formed, the circulation flow of the cooling liquid is facilitated, and the cooling effect is improved. In addition, the rotor 32 can generate power for enabling the cooling liquid to flow back upwards in the rotating process, and in addition, a liquid outlet channel 213 is formed through a gap between two adjacent components for enabling the cooling liquid to flow back, so that the flow quantity of the cooling liquid flowing back can be slowed down, the cooling liquid and the peripheral components can be fully exchanged, and the cooling effect is further improved.

Alternatively, as shown in fig. 14, the liquid outlet channel 213 includes a first liquid outlet channel disposed between the outer peripheral surface of the rotor 32 and the inner peripheral surface of the casing 20, and a second liquid outlet channel disposed between the outer peripheral surface of the main shaft 31 and the inner peripheral surface of the rotor 32, so that after the cooling liquid enters through the liquid inlet channel 212 and flows through the swirl structure 12, a part of the cooling liquid may flow back through the first liquid outlet channel to form a first cooling liquid circulation flow path, and another part of the cooling liquid may flow back through the second liquid outlet channel to form a second cooling liquid circulation flow path. When the coolant passes through the first coolant circulation flow path, the coolant can pass through the outer peripheral surface of the stator 33, the end surfaces of the stator 33 and the rotor 32, the inner peripheral surface of the stator 33 and the outer peripheral surface of the rotor 32, thereby realizing cooling of the stator 33 and the rotor 32; when the coolant passes through the second coolant circulation flow path, the coolant can pass through the outer peripheral surface of the stator 33, the end surfaces of the stator 33 and the rotor 32, the outer peripheral surface of the spindle 31, and the inner peripheral surface of the rotor 32, thereby cooling the stator 33, the rotor 32, and the spindle 31. Thus, the motor assembly 30 can be cooled down well by the coolant double circulation flow path.

As shown in fig. 6 and 13, in some embodiments, the power device 100 further includes an electric control 60, and an electric control cavity 241 for accommodating the electric control element 60 is formed in the casing 20, where the electric control cavity 241 is located on a side of the liquid passing element 10 away from the motor cavity 211, so that when the cooling liquid flows through the liquid passing element 10 in the cooling liquid circulation flow path, the cooling effect can be also achieved on the electric control element 60.

As shown in fig. 11 to 14, in one embodiment, the power device 100 is an electronic water pump, the power device 100 further includes a pump housing 40 and a pump body 50, the pump housing 40 is connected to the housing 20, the pump housing 40 is configured to accommodate a pump body cavity 41 of the pump body 50, the pump housing 40 is provided with a liquid inlet 42 and a liquid outlet 43 that are communicated with the pump body cavity 41, a liquid inlet end of the liquid inlet channel 212 is communicated with the pump body cavity 41, a liquid outlet end of the liquid outlet channel 213 is communicated with the pump body cavity 41, and the pump body 50 is connected to the rotor 32.

In this embodiment, the pump casing 40 may be disposed at an end of the main casing 21 of the casing 20 facing away from the liquid passing member 10, and the pump casing 40 and the casing 20 may be fixed by means of a snap connection, a screw connection, welding, or the like. Alternatively, the pump case 40 is welded to the housing 20, so that the sealing property and the waterproof level between the pump case 40 and the housing 20 can be improved. When the electronic water pump works, the rotor 32 of the motor assembly 30 drives the pump body 50 to rotate, so that the electronic water pump can suck cooling liquid into the pump body cavity 41 through the liquid inlet 42 and pump the cooling liquid out through the liquid outlet 43. Meanwhile, the pump body 50 rotates to generate a certain pressure in the pump body cavity 41, so that a part of cooling liquid in the pump body cavity 41 can enter the cooling liquid circulation flow path through the liquid inlet channel 212 and then flow back into the pump body cavity 41 through the liquid outlet channel 213, and the circulating flow of the cooling liquid can be realized. The cooling liquid can cool down the motor assembly 30 and the electric control member 60 while the cooling liquid circulation flow path flows. Moreover, the cooling liquid can generate rotational flow when passing through the rotational flow structure 12 of the liquid passing member 10, thereby further improving the cooling effect.

In one embodiment, at least one of the outer peripheral surface of the rotor 32, the inner peripheral surface of the housing 20, the outer peripheral surface of the main shaft 31, and the inner peripheral surface of the rotor 32 is provided with a flow channel groove, one end of which communicates with the liquid passing hole 101, and the other end of which communicates with the pump body chamber 41. In this way, the cooling liquid entering the motor chamber 211 through the liquid passage groove 101 can be guided to the pump body chamber 41, and the flow resistance of the cooling liquid can be reduced. Wherein the runner grooves include, but are not limited to, straight grooves, angled grooves, or spiral grooves, etc. The number of the runner grooves can be one, two or more according to actual needs. For example, as shown in fig. 7 and 9, in the present embodiment, the inner peripheral surface of the casing 20 is provided with a first flow passage groove 214, and the first flow passage groove 214 is provided to extend in the axial direction of the casing 20; alternatively, the first flow channel 214 is provided in plurality, and the plurality of first flow channels 214 are arranged at intervals along the circumferential direction of the casing 20. As shown in fig. 15 and 16, in the present embodiment, the inner peripheral surface of the rotor 32 is provided with a second flow passage groove 321, and the second flow passage groove 321 is provided to extend in the axial direction of the rotor 32; alternatively, the second flow passage grooves 321 are provided in plurality, and the plurality of second flow passage grooves 321 are arranged at intervals along the circumferential direction of the rotor 32. In some embodiments, the rotor 32 may specifically include a sleeve sleeved on the periphery of the spindle 31, and a rotor body sleeved on the periphery of the sleeve, and a second runner groove 321 may be disposed on the inner peripheral surface of the sleeve. Optionally, a support plate is provided on an end face of the rotor 32, and the pump body 50 is fixed to the support plate, so that the pump body 50 can be driven to rotate by rotation of the rotor 32. The pump body 50 may specifically employ an impeller.

It will be appreciated that when the pump body 50 rotates, a high pressure area and a low pressure area are formed in the pump body cavity 41, optionally, the liquid inlet end of the liquid inlet channel 212 is located in the high pressure area, and the liquid outlet end of the liquid outlet channel 213 is located in the low pressure area, so that the pressure generated by the rotation of the pump body 50 can generate the power of the circulating flow of the cooling liquid. For example, as shown in fig. 13, in the present embodiment, a liquid inlet channel 212 is disposed in a wall of the casing 20, the casing 20 has a first end surface opposite to the pump body cavity 41, the first end surface is provided with at least one liquid inlet port 2121 communicating with the liquid inlet channel 212, 50% of a peak water pressure of the first end surface is a preset water pressure, and the water pressure of at least one liquid inlet port 2121 is greater than or equal to the preset water pressure. Thus, the hydraulic pressure of the cooling liquid in the cooling liquid circulation flow path is guaranteed, so that the circulation power of the cooling flow path is guaranteed. In this embodiment, when designing the liquid inlet channel 212, the electronic water pump may be simulated to obtain a flow curve of the end face of the first end, and then the preset flow corresponding to the preset water pressure is obtained through the corresponding relationship between the flow of the electronic water pump and the water pressure, and the positions where the flow is greater than or equal to the preset flow are obtained on the flow curve, where the water pressures corresponding to the positions are greater than or equal to the preset water pressure, which can be understood that the corresponding relationship is affected by the internal structure of the electronic water pump, and the corresponding relationships between the flow and the water pressure of the electronic water pump with different structures are also different. Of course, in some embodiments, a micro-power pump may also be provided in the coolant circulation flow path to provide power for the coolant flow.

The invention also provides a vehicle, which comprises the power device 100, and the specific structure of the power device 100 refers to the above embodiment, and since the vehicle adopts all the technical solutions of all the above embodiments, the vehicle at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be described in detail herein.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (30)

1. A liquid passing member, comprising:

the body is provided with liquid passing holes penetrating through two sides of the body; and

the cyclone structure is arranged on one side of the body, which is close to the liquid inlet end of the liquid passing hole, and is used for guiding flowing-through liquid to form cyclone and enter the liquid passing hole.

2. The liquid passing member according to claim 1, wherein the body comprises an end wall and an annular wall arranged at the periphery of the end wall and extending in the axial direction, the liquid passing hole is arranged at the end wall, the annular wall and the end wall together form a heat exchange cavity communicated with the liquid inlet end of the liquid passing hole, and the rotational flow structure is arranged at one side of the body provided with the heat exchange cavity.

3. The liquid passing member according to claim 2, wherein the swirl structure comprises a flow guide channel provided in the annular wall, the flow guide channel extending between an outer peripheral surface and an inner peripheral surface of the annular wall, the flow guide channel having an input port and an output port penetrating the inner peripheral surface of the annular wall, the direction of extension of the flow guide channel being arranged at an angle to a radial direction of the annular wall.

4. A liquid passing member according to claim 3 wherein the end face of the annular wall facing the end wall is formed with the flow directing channel.

5. A liquid passing member according to claim 3 wherein the central line of the inlet port and the axis of the annular wall are projected onto the same projection plane along the axial direction of the annular wall, respectively, and the projection connecting line of the central line of the inlet port and the axis of the annular wall form a first included angle with the extending direction of the flow guiding channel, and the first included angle is an acute angle.

6. The fluid transfer element of claim 5, wherein the first included angle is α, wherein 0 ° < α+.ltoreq.70 °.

7. A liquid passing member according to claim 3 wherein the flow guide channel has two side walls disposed opposite each other in the circumferential direction of the annular wall, the side walls being disposed at a second angle, the spacing of the side walls diverging in a direction toward the outlet port.

8. The fluid transfer element of claim 7, wherein the second included angle is β, wherein 0 ° < β+.ltoreq.20°.

9. A fluid passing member according to claim 3 wherein the annular wall is provided with at least two of the flow directing channels circumferentially spaced apart.

10. A liquid transfer member as claimed in any of claims 2 to 9 wherein the swirl structure comprises a deflector rib disposed within the heat exchange chamber, the deflector rib extending from the annular wall towards the liquid transfer aperture and at least partially surrounding the periphery of the liquid transfer aperture.

11. The liquid passing member according to claim 10, wherein the flow guiding rib comprises a first rib section and a second rib section which are connected, the first rib section extends from one side close to the annular wall to be tangent to the periphery of the liquid passing hole, the second rib section is partially arranged around the periphery of the liquid inlet end of the liquid passing hole, the center line of the liquid passing hole and the axis of the annular wall are respectively projected to the same projection surface along the axial direction of the annular wall, and a projection connecting line of the center line and the axis of the annular wall is arranged at a third included angle with the extending direction of the first rib section.

12. The fluid transfer element of claim 11, wherein the third included angle is γ, wherein 15 ° and γ and 75 °.

13. The liquid passing member according to claim 10, wherein the cross-sectional shape of the guide rib in a direction perpendicular to the extending direction thereof is triangular, trapezoidal or elliptical.

14. The liquid passing member according to claim 10, wherein the plurality of guide ribs and the plurality of liquid passing holes are respectively provided, the plurality of guide ribs are arranged at intervals along the circumferential direction of the end wall, the plurality of liquid passing holes are arranged at intervals along the circumferential direction of the end wall, and the guide ribs are arranged in one-to-one correspondence with the liquid passing holes.

15. The liquid passing member according to claim 10, wherein a groove is provided on a surface of the end wall facing the heat exchange chamber, an inner diameter of the groove is smaller than an inner diameter of the annular wall, so that a stepped surface is formed at a portion of the end wall corresponding to an inner periphery of the groove, and the liquid passing hole and the flow guide rib are located in the groove.

16. The fluid passing member of claim 15, wherein the fluid passing hole is provided at a bottom of the groove and adjacent to an inner circumferential surface of the groove, and the guide rib extends from the inner circumferential surface of the groove to the bottom of the groove and surrounds a periphery of the fluid passing hole.

17. The fluid transfer element of claim 15, wherein the inner peripheral surface of the recess is provided with a tapered surface tapering toward a side facing away from the step surface.

18. The liquid passing member according to claim 1, wherein the liquid passing hole has a flow guiding conical surface, and the flow guiding conical surface is tapered from a liquid inlet end to a liquid outlet end of the liquid passing hole.

19. The fluid passing member of claim 18 wherein the cone angle of the flow directing taper is θ, wherein 0 ° < θ+.ltoreq.30°.

20. A casing comprising a fluid passing member according to any one of claims 1 to 19.

21. The housing of claim 20, including a main housing defining a motor cavity, said liquid passing member being disposed adjacent said motor cavity and said liquid outlet end of said liquid passing hole being in communication with said motor cavity.

22. The enclosure of claim 21, further comprising a thermally conductive plate disposed on a side of the liquid passing member having a swirl structure, the side of the thermally conductive plate facing away from the swirl structure being configured to mount an electrical control.

23. A casing according to claim 21 or 22 wherein the liquid passing member is integrally formed with the main housing.

24. A power plant comprising a housing as claimed in any one of claims 20 to 23, and a motor assembly disposed within the housing.

25. The power plant of claim 24, wherein the motor assembly comprises a main shaft fixed to the housing, a rotor sleeved on the periphery of the main shaft, and a stator sleeved on the periphery of the rotor, the main shaft and the rotor are accommodated in a motor cavity of the housing, and the stator is molded in a wall of the housing.

26. The power plant of claim 25, wherein one end of the main shaft is overmolded within a wall of the housing.

27. A power plant according to claim 25 or 26, wherein a liquid inlet channel is provided in the wall of the housing, the liquid inlet channel being in communication with the liquid passage via the swirl structure, the gap between the rotor and the housing and/or the gap between the spindle and the rotor forming a liquid outlet channel in communication with the liquid passage.

28. The power plant of claim 27, wherein the power plant is an electronic water pump, the power plant further comprises a pump housing and a pump body, the pump housing is connected with the housing, the pump housing is configured to accommodate a pump body cavity of the pump body, the pump housing is provided with a liquid inlet and a liquid outlet communicated with the pump body cavity, a liquid inlet end of the liquid inlet channel is communicated with the pump body cavity, a liquid outlet end of the liquid outlet channel is communicated with the pump body cavity, and the pump body is connected with the rotor.

29. The power unit according to claim 28, wherein at least one of an outer peripheral surface of the rotor, an inner peripheral surface of the housing, an outer peripheral surface of the main shaft, and an inner peripheral surface of the rotor is provided with a flow channel groove, one end of the flow channel groove communicates with the liquid passing hole, and the other end of the flow channel groove communicates with the pump body chamber.

30. A vehicle comprising a power plant as claimed in any one of claims 24 to 29.