Housing, power device and vehicle

Abstract

The application discloses a shell, a power device and a vehicle, wherein the shell comprises a shell body, a partition plate is arranged in an inner cavity of the shell body, the partition plate divides the inner cavity into a containing cavity and a heat exchange cavity, the heat exchange cavity is used for passing cooling liquid, and a rotational flow structure is arranged in the heat exchange cavity and used for forming rotational flow of the passing cooling liquid. When the shell is used for the power device, the shell can improve the cooling and temperature reduction effect on electrical devices of the power device and prolong the service life of the power device.

Description

[0001] This application claims priority to the Chinese Patent Application No. 202310295844.2, filed on March 22, 2023, entitled "Liquid Passing Member, Electronic Water Pump and Vehicle", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of power devices, in particular to a casing, a power device and a vehicle. BACKGROUND

[0003] Power devices such as electronic water pumps and drive motors have a wide range of applications in the industrial field. For example, electronic water pumps can be widely used in the cooling systems of conventional power and new energy vehicles to provide power for the circulation of cooling liquid in the cooling system, so as to improve the cooling efficiency of the cooling system. However, when the operating power of the power device is large, the heat generated by the electrical components (such as motor assemblies, electrical controls, etc.) of the power device is very high, which can easily cause the motor assembly to overheat and fail, affecting the service life of the power device. SUMMARY

[0004] The main purpose of the present application is to provide a casing which, when used in a power device, can improve the cooling effect of the electrical components of the power device and prolong the service life of the power device.

[0005] To achieve the above-mentioned purpose, the casing provided by the present application comprises:

[0006] a casing body, an inner cavity of the casing body being provided with a partition plate, the partition plate dividing the inner cavity into a containing cavity and a heat exchange cavity, the heat exchange cavity being used for passing cooling liquid; and

[0007] a cyclone structure provided in the heat exchange cavity, the cyclone structure being used for forming a cyclone of the passing cooling liquid.

[0008] In one embodiment, the casing body comprises a casing peripheral wall extending around the periphery of the partition plate and extending towards one side of the partition plate, and an annular flange extending around the periphery of the partition plate and extending towards the other side of the partition plate, the casing peripheral wall and the partition plate forming the containing cavity, and the annular flange and the partition plate forming the heat exchange cavity.

[0009] In one embodiment, a cooling liquid flow channel is provided in the wall of the casing peripheral wall, an end face of an end of the casing peripheral wall away from the partition plate is provided with a liquid inlet port in communication with the cooling liquid flow channel, and an inner peripheral surface of the annular flange is provided with a slot in communication with the cooling liquid flow channel.

[0010] In one embodiment, the partition plate is provided with a liquid passing hole for communicating the heat exchange cavity with the containing cavity.

[0011] In one of the embodiments, a flow guide cone is arranged at the end of the heat exchange cavity close to the through hole.

[0012] In one of the embodiments, the cone angle of the flow guide cone is θ, wherein 0°<θ≤30°.

[0013] In one of the embodiments, the through hole is arranged at the position where the shell peripheral wall meets the partition plate, and the inner wall surface of the shell peripheral wall is provided with a flow channel groove corresponding to the through hole, one end of the flow channel groove is communicated with the through hole, and the other end of the flow channel groove penetrates through the shell peripheral wall away from the partition plate.

[0014] In one of the embodiments, the rotational flow structure comprises a flow guide rib, the flow guide rib is arranged to extend from the side close to the annular flange towards the through hole, and the flow guide rib is at least partially arranged around the periphery of the through hole.

[0015] In one of the embodiments, a plurality of through holes and a plurality of flow guide ribs are arranged respectively, the plurality of through holes are arranged in a circumferential direction of the annular flange at intervals, the plurality of flow guide ribs are arranged in a circumferential direction of the annular flange at intervals, and the flow guide ribs and the through holes are arranged one by one.

[0016] In one of the embodiments, the rotational flow structure is integrally formed on the shell body.

[0017] In one of the embodiments, the accommodation cavity is used for accommodating a rotor and a rotating shaft of a motor assembly, and a plastic packaging cavity for accommodating a stator of the motor assembly is formed in the wall of the shell body.

[0018] The application further provides a power device comprising the shell as described above.

[0019] In one of the embodiments, the power device is an electronic water pump, the electronic water pump further comprises a pump shell, a pump body and a motor assembly, the pump shell is connected with the shell body, the pump shell is configured to form a pump body cavity for accommodating the pump body, the motor assembly is at least partially accommodated in the accommodation cavity, the motor assembly is drivingly connected with the pump body, and the pump body cavity is communicated with the heat exchange cavity to deliver cooling liquid to the heat exchange cavity.

[0020] In one of the embodiments, the electronic water pump further comprises an electric control, the electric control is arranged in the shell and adjacent to the heat exchange cavity.

[0021] Alternatively, the electric control is arranged on the outer side surface of the pump shell.

[0022] Alternatively, the electric control is arranged on the outer side surface of the shell body.

[0023] Alternatively, the electric control comprises a first electric control board and a second electric control board, the first electric control board is arranged on the outer side of the pump shell, and the second electric control board is arranged in the machine shell and adjacent to the heat exchange cavity.

[0024] The application further provides a vehicle comprising the power device.

[0025] The technical scheme of the application has the following beneficial effects: the inner cavity of the shell body is provided with a partition plate, the inner cavity is divided into a containing cavity for containing the electric device and a heat exchange cavity for the cooling liquid to pass through by the partition plate, and a rotational flow structure is arranged in the heat exchange cavity, so that the rotational flow structure can be arranged adjacent to the containing cavity. In this way, the cooling liquid can exchange heat with the electric device in the containing cavity when flowing through the heat exchange cavity, and the heat generated by the electric device can be taken away with the continuous flow of the cooling liquid. The cooling liquid can generate rotational flow under the action of the rotational flow structure, thereby prolonging the residence time of the cooling liquid in the heat exchange cavity, increasing the heat exchange time of the cooling liquid and the electric device, and playing a role in strengthening heat exchange, so as to further improve the cooling and temperature reduction effect of the electric device, effectively prevent the electric device from being disabled due to excessive temperature rise, effectively guarantee the performance stability of the power device, and prolong the service life of the power device. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0027] Figure 1 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application;

[0028] Figure 2 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application; Figure 1 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application;

[0029] Figure 3 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application; Figure 1 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application;

[0030] Figure 4 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application; Figure 1 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application;

[0031] Figure 5 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application;

[0032] Figure 6 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application; Figure 5 FIG. 1 is a structural schematic view of an embodiment of the machine shell of the application;

[0033] Figure 7 Fig. 1 is a schematic view of a cross-sectional structure of an electronic water pump according to an embodiment of the present application; Figure 5 Fig. 2 is a schematic view of a cross-sectional structure of an electronic water pump according to a second embodiment of the present application;

[0034] Figure 8 Fig. 3 is a schematic view of a cross-sectional structure of an electronic water pump according to a third embodiment of the present application;

[0035] Figure 9 Fig. 4 is a schematic view of a cross-sectional structure of an electronic water pump according to a fourth embodiment of the present application.

[0036] Figure 10 Fig. 5 is a schematic view of a cross-sectional structure of an electronic water pump according to a fifth embodiment of the present application.

[0037] Brief Description of the Drawings:

[0038] Reference Name Reference Name 100 Electronic water pump 1211 First rib section 10 Machine shell 1212 Second rib section 11 Shell body 20 Motor assembly 111 Partition plate 21 Rotor 112 Shell peripheral wall 22 Stator 113 Annular flange 23 Rotating shaft 114 Convex rib 30 Pump shell 101 Containing cavity 301 Pump body cavity 102 Heat exchange cavity 302 Liquid inlet 103 Liquid passing hole 303 Liquid outlet 104 Flow channel groove 40 Pump body 105 Cooling liquid flow channel 50 Electronic control 1051 Liquid inlet port 51 First electronic control board 1052 Liquid outlet port 52 Second electronic control board 106 Flow guide groove 60 Heat conduction plate 1061 Slot 70 Sealing element 107 Plastic-coated cavity 80 End cover 12 Swirl structure 801 Wire passing hole 121 Flow guide rib

[0039] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0041] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0042] In addition, if the embodiments of the present application involve descriptions of “first”, “second” and the like, the descriptions of “first”, “second” and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel solutions are included, taking “A and / or B” as an example, including A solution, or B solution, or A and B solutions are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0043] The present application provides a casing 10. The casing 10 can be used as a protective housing of electric devices of a power device, wherein the power device includes but is not limited to an electronic water pump 100, a liquid-cooled motor, etc. The electric devices can be motor assemblies 20, electric controls 50, power supplies, etc.

[0044] Please refer to Figures 1 to 4 In an embodiment of the present application, the casing 10 includes a casing body 11 and a rotational flow structure 12. The casing body 11 has a partition 111 in the inner cavity thereof, which divides the inner cavity into a receiving cavity 101 and a heat exchange cavity 102, wherein the heat exchange cavity 102 is used for passing cooling liquid; and the rotational flow structure 12 is arranged in the heat exchange cavity 102, and is used for forming rotational flow of the cooling liquid passing therethrough.

[0045] Specifically, the receiving cavity 101 of the casing body 11 can be used for accommodating electric devices, including but not limited to motor assemblies 20, electric controls 50, power supplies, etc. For example, in the present embodiment, the electric devices are taken as the motor assembly 20, as shown in Figure 7 The motor assembly 20 includes a rotating shaft 23, a rotor 21 sleeved on the rotating shaft 23, and a stator 22 surrounding the periphery of the rotor 21. In application, the motor assembly 20 can be assembled as a whole in the receiving cavity 101, or the rotor 21 and the rotating shaft 23 of the motor assembly 20 can be assembled in the receiving cavity 101, and the stator 22 can be overmolded in the wall of the casing body 11 by insert injection molding process. The heat exchange cavity 102 is used for passing cooling liquid, and the rotational flow structure 12 is arranged in the heat exchange cavity 102. When the cooling liquid passes through the rotational flow structure 12, the rotational flow structure 12 can cause the cooling liquid to form rotational flow under the action of the rotational flow structure 12, and the rotational flow structure 12 is arranged adjacent to the receiving cavity 101, thereby prolonging the residence time of the cooling liquid near the receiving cavity 101 and increasing the heat exchange time of the cooling liquid and the motor assembly 20, so as to strengthen the heat exchange. The rotational flow structure 12 includes but is not limited to a guide rib 121, a guide groove 106, a guide plate, a spiral structure, etc. for guiding the cooling liquid to form rotational flow. The number of stages of the rotational flow structure 12 can be set as needed, for example, single-stage rotational flow structure 12, two-stage rotational flow structure 12, or multi-stage rotational flow structure 12, etc., which is not limited herein.

[0046] The technical scheme of the present application is characterized in that a partition plate 111 is arranged in the inner cavity of the shell body 11, the inner cavity is divided into a containing cavity 101 for containing electrical devices and a heat exchange cavity 102 for cooling liquid to pass through by the partition plate 111, and a cyclone structure 12 is arranged in the heat exchange cavity 102, so that the cyclone structure 12 is arranged adjacent to the containing cavity 101. In this way, the cooling liquid can exchange heat with the electrical devices in the containing cavity 101 when flowing through the heat exchange cavity 102, and the heat generated by the electrical devices can be carried away with the continuous flow of the cooling liquid; and the cooling liquid can generate cyclone under the action of the cyclone structure 12, thereby prolonging the residence time of the cooling liquid in the heat exchange cavity 102, increasing the heat exchange time of the cooling liquid and the electrical devices, and playing a role of strengthening heat exchange, so as to further improve the cooling and cooling effect of the electrical devices, effectively avoid the failure of the electrical devices due to excessive temperature rise, effectively guarantee the performance stability of the power device, and prolong the service life of the power device.

[0047] Please refer to Figure 3 In one embodiment, the shell body 11 includes a shell peripheral wall 112 arranged around the periphery of the partition plate 111 and extending towards one side of the partition plate 111, and an annular flange 113 arranged around the periphery of the partition plate 111 and extending towards the other side of the partition plate 111, the shell peripheral wall 112 and the partition plate 111 form the containing cavity 101, and the annular flange 113 and the partition plate 111 form the heat exchange cavity 102. Optionally, the shell peripheral wall 112, the partition plate 111 and the annular flange 113 can be integrally injection molded by an injection molding process, which can simplify the production process and ensure the structural strength. Alternatively, the shell peripheral wall 112 and the annular flange 113 can be integrally formed, and the partition plate 111 is assembled at the abutting position of the shell peripheral wall 112 and the annular flange 113 by an assembly structure.

[0048] As Figure 1 , Figure 2 and Figure 7As shown, in one of the embodiments, the shell peripheral wall 112 is provided with a cooling liquid flow channel 105 in the wall body, the end face of the end of the shell peripheral wall 112 away from the partition plate 111 is provided with a liquid inlet port 1051 communicating with the cooling liquid flow channel 105, and the inner peripheral surface of the annular flange 113 is provided with a slot 1061 communicating with the cooling liquid flow channel 105. In this way, the cooling liquid can enter the cooling liquid flow channel 105 through the liquid inlet port 1051 and then be ejected into the heat exchange cavity 102 through the slot 1061 in the inner wall surface of the annular flange 113. By providing the cooling liquid flow channel 105 in the wall body of the shell peripheral wall 112, the cooling liquid flowing through the cooling liquid flow channel 105 can also carry away part of the heat, so as to further improve the cooling effect of the electrical device. The cooling liquid flow channel 105 can be formed integrally with the wall body of the shell peripheral wall 112, or the wall body of the shell peripheral wall 112 can be provided as a hollow structure, and a pipe is inserted in the hollow structure to form the cooling liquid flow channel 105 in the pipe. Alternatively, in this embodiment, the outer peripheral surface of the shell peripheral wall 112 is provided with a protruding rib 114 extending in the axial direction, and the cooling liquid flow channel 105 can be arranged inside the protruding rib 114, and the inside of the protruding rib 114 can also be formed as a hollow structure to facilitate the wire of the stator 22 winding of the motor assembly 20 to pass through.

[0049] As shown, Figure 7 As shown, in some embodiments, when the shell 10 is applied to the electronic water pump 100, the pump shell 30 of the electronic water pump 100 can be arranged at the end of the shell peripheral wall 112 provided with the liquid inlet port 1051, and the pump body cavity 301 is formed in the pump shell 30, and the pump body cavity 301 communicates with the cooling liquid flow channel 105 through the liquid inlet port 1051. In this way, the cooling liquid in the pump body cavity 301 can be transported into the cooling liquid flow channel 105 through the liquid inlet port 1051 and then enter the heat exchange cavity 102 through the slot 1061. The end face of the end of the shell peripheral wall 112 away from the partition plate 111 is referred to as a first end face, the first end face is provided with at least one liquid inlet port 1051, 50% of the peak water pressure of the first end face is a preset water pressure, and the water pressure of at least one liquid inlet port 1051 is greater than or equal to the preset water pressure. In this way, the water pressure of the cooling liquid in the cooling liquid flow channel 105 is guaranteed, so as to guarantee the circulating power of the cooling flow path. In this embodiment, when designing the cooling liquid flow channel 105, the electronic water pump 100 can be simulated first to obtain the flow curve of the first end face, and then the corresponding relationship between the flow and the water pressure of the electronic water pump 100 is used to obtain the preset flow corresponding to the preset water pressure. The water pressure corresponding to the positions where the flow is greater than or equal to the preset flow in the flow curve is greater than or equal to the preset water pressure. It can be understood that the corresponding relationship is affected by the internal structure of the electronic water pump 100, and the corresponding relationship between the flow and the water pressure is different for electronic water pumps 100 with different structures.

[0050] To further enhance the swirling effect, such as Figure 4 As shown, in one embodiment, a guide groove 106 is provided in the annular flange 113. The guide groove 106 extends between the outer and inner circumferential surfaces of the annular flange 113. The inlet end of the guide groove 106 is connected to the coolant flow channel 105, and the outlet end of the guide groove 106 penetrates the inner circumferential surface of the annular flange 113 to form the slot 1061. The extending direction of the guide groove 106 is set at an angle to the radial direction of the annular flange 113.

[0051] In this embodiment, after the coolant enters the guide channel 106 through the coolant flow channel 105, the extension direction of the guide channel 106 has a certain angle with the radial direction of the annular flange 113. This allows the coolant flowing out of the guide channel 106 to simultaneously have components in both the radial and tangential directions of the annular flange 113. Guided by the guide channel 106, the coolant can gradually rotate and flow towards the center along the inner circumference of the annular flange 113 after being output from the outlet end of the guide channel 106, thereby forming a vortex. This extends the residence time of the coolant and improves the cooling effect. Furthermore, after the coolant is ejected through the slot opening 1061 of the guide channel 106, it forms a primary vortex, and then forms a secondary vortex through the action of the vortex structure 12 in the heat exchange cavity 102. This allows the coolant to form two stages of vortex, further extending the residence time of the coolant in the heat exchange cavity 102. This facilitates sufficient heat exchange between the coolant and the electrical components in the accommodating cavity 101, improving the cooling effect.

[0052] Furthermore, such as Figure 4 As shown, the coolant flow channel 105 has a liquid outlet port 1052 that communicates with the guide groove 106. The center line of the liquid outlet port 1052 and the axis of the annular flange 113 are projected onto the same projection plane along the axial direction of the annular flange 113, and the line connecting their projections forms a first angle with the extension direction of the guide groove 106. The first angle is an acute angle.

[0053] In the embodiment, the cooling liquid flows into the flow guide groove 106 through the outflow port 1052 of the cooling liquid flow channel 105, and is ejected from the slot 1061 on the inner circumferential side of the annular flange 113 after passing through the flow guide groove 106. The first included angle a is an acute angle, that is, the first included angle a is greater than 0 degrees and less than 90 degrees. In this way, the speed of the cooling liquid has a component in the radial direction of the annular flange 113, so that the cooling liquid can flow to the center of the annular flange 113, and the speed of the cooling liquid has a component in the tangential direction of the annular flange 113, so that the cooling liquid has a tendency to flow along the inner circumferential edge of the annular flange 113, thereby forming a primary swirl flow to ensure the cooling effect of the cooling liquid. Preferably, the first included angle a is set to be an acute angle less than 70 degrees. In this way, the swirling effect of the primary swirl flow can be ensured, thereby effectively prolonging the flow time of the cooling liquid in the heat exchange cavity 102 to ensure the cooling effect of the cooling liquid.

[0054] Further, the flow guide groove 106 has two side groove walls oppositely arranged in the circumferential direction of the shell peripheral wall 112. The two side groove walls are arranged at a second included angle, and the distance between the two side groove walls is gradually increased in the direction close to the slot 1061. In the embodiment, the flow rate of the cooling liquid flowing through the gradually expanding flow guide groove 106 is increased, thereby increasing the convective heat transfer coefficient between the cooling liquid and the electrical device to further improve the heat absorption effect of the cooling liquid, thereby ensuring the cooling effect of the cooling liquid on the electrical device. Preferably, the angle bisector of the second included angle β is the extension direction of the flow guide groove 106. The second included angle β is set to be an acute angle less than 20 degrees. In this way, the cooling liquid can be ejected from the slot 1061 at a higher flow rate, and the cooling liquid ejected from the flow guide groove 106 can also have a better swirling effect, thereby further improving the cooling and temperature reduction effect of the cooling liquid on the electrical device.

[0055] To further enhance the swirling effect of the cooling liquid, in one embodiment, the annular flange 113 is circumferentially spaced apart by at least two flow guide grooves 106. In this way, multiple primary swirl flows in the same direction can be formed by the multiple flow guide grooves 106. The multiple primary swirl flows can be superimposed into more intense swirl flows without mutual reduction. The multiple primary swirl flows can rotate along the inner circumferential edge of the annular flange 113, which is beneficial to ensure the swirling effect of the primary swirl flow and thereby improve the cooling effect of the cooling liquid.

[0056] To further improve the cooling and temperature reduction effect on the electrical device, as shown in FIG. 6, the heat exchange cavity 102 is provided with a plurality of annular flanges 113 arranged in the circumferential direction of the shell peripheral wall 112. In this way, the cooling liquid can flow through the multiple annular flanges 113 to form multiple primary swirl flows in the same direction, and the multiple primary swirl flows can be superimposed into more intense swirl flows without mutual reduction. The multiple primary swirl flows can rotate along the inner circumferential edge of the annular flange 113, which is beneficial to ensure the swirling effect of the primary swirl flow and thereby improve the cooling effect of the cooling liquid. Figure 3As shown, the partition plate 111 is provided with a liquid passing hole 103 which communicates the heat exchange cavity 102 with the accommodating cavity 101. In this way, after the cooling liquid forms a cyclone in the heat exchange cavity 102 via the cyclone structure 12, the cooling liquid can also spin into the accommodating cavity 101 via the liquid passing hole 103, so that the cooling liquid can directly contact the surface of the electrical device in the accommodating cavity 101 to exchange heat, so as to rapidly cool the electrical device. The number of the liquid passing hole 103 can be one, two or more according to actual needs. Alternatively, the liquid passing hole 103 is provided in plurality, and the plurality of liquid passing holes 103 are arranged along the circumference of the partition plate 111. In this way, the flow of the cooling liquid can be increased, so that the cooling liquid in the heat exchange cavity 102 can flow to the accommodating cavity 101 in time and then flow out, so as to avoid the cooling liquid staying in the heat exchange cavity 102 for too long, which can cause the temperature of the cooling liquid to rise too high and the cooling effect to decrease. At the same time, it is also beneficial to continuously supplement the cooling liquid with a lower temperature into the heat exchange cavity 102, so as to ensure the cooling effect.

[0057] Further, the liquid passing hole 103 is provided with a flow guide taper surface at one end close to the heat exchange cavity 102. The flow guide taper surface is tapered in the direction towards the accommodating cavity 101. In this way, the flow guide taper surface can further improve the cyclone effect of the cooling liquid, and the flow guide taper surface can also guide the cooling liquid to flow to the accommodating cavity 101.

[0058] Alternatively, the taper angle of the flow guide taper surface is θ, wherein 0° < θ ≤ 30°. The flow guide taper surface can ensure the effect while being easy to be formed on the partition plate 111.

[0059] As can be understood, when the electrical device (for example, the motor assembly 20) is assembled in the accommodating cavity 101, the cooling liquid entering the accommodating cavity 101 via the liquid passing hole 103 flows upward at the gap between the outer peripheral surface of the electrical device and the inner peripheral surface of the shell peripheral wall 112. In order to reduce the flow resistance of the cooling liquid, as shown in Figure 1 and Figure 3 In one embodiment, the liquid passing hole 103 is located at the position where the shell peripheral wall 112 meets the partition plate 111. The inner wall surface of the shell peripheral wall 112 is provided with a flow channel groove 104 corresponding to the liquid passing hole 103. One end of the flow channel groove 104 communicates with the liquid passing hole 103, and the other end of the flow channel groove 104 penetrates through the shell peripheral wall 112 away from the partition plate 111. In this way, after the cooling liquid enters the accommodating cavity 101 via the liquid passing hole 103, the cooling liquid can flow upward along the flow channel groove 104 to the end surface of the shell peripheral wall 112 and then flow out. The number of the flow channel groove 104 is matched with the number of the liquid passing hole 103.

[0060] Please refer to Figure 2 and Figure 4In one embodiment, the swirling structure 12 includes guide ribs 121 extending from the side near the annular flange 113 toward the liquid passage 103, with the guide ribs 121 at least partially surrounding the periphery of the liquid passage 103. Thus, the coolant forms a swirling flow under the action of the guide ribs 121 and is guided into the liquid passage 103 through the guide ribs 121. The cross-sectional shape of the guide ribs 121 perpendicular to their extending direction can be triangular, trapezoidal, elliptical, or other irregular shapes, etc.

[0061] Furthermore, such as Figure 4 As shown, the guide rib 121 includes a first rib segment 1211 and a second rib segment 1212 connected to each other. The first rib segment 1211 extends from the side near the annular flange 113 to be tangent to the periphery of the liquid passage 103, and the second rib segment 1212 partially surrounds the periphery of the liquid passage 103. The centerline of the liquid passage 103 and the axis of the annular flange 113 are projected onto the same projection plane along the axial direction of the annular flange 113, and the line connecting their projections forms a third angle with the extension direction of the first rib segment 1211. In this way, the coolant can be guided by the first rib segment 1211 to the periphery of the liquid passage 103, and can rotate around the periphery of the liquid passage 103 under the guidance of the second rib segment 1212, so as to finally swirl into the liquid passage 103 to form a vortex. Of course, in other embodiments, an arc-shaped guide rib 121 tangential to the liquid passage 103 can also be provided, which can also guide the coolant to form a swirling flow into the liquid passage 103. Optionally, the third included angle γ is an acute angle, that is, the angle between the extension direction of the first rib segment 1211 and the radial direction of the annular flange 113 is greater than 0 and less than 90 degrees, which can facilitate the introduction of the first rib segment 1211 into the primary swirling flow while promoting the formation of the secondary swirling flow. It is preferable that the third included angle γ is set to an acute angle of 15 degrees to 75 degrees, as this range of the third included angle γ can give the first rib segment 1211 a better guiding effect.

[0062] Furthermore, such as Figure 4 As shown, multiple liquid passage holes 103 and multiple flow guide ribs 121 are provided. The multiple liquid passage holes 103 are arranged at intervals along the circumference of the annular flange 113, and the multiple flow guide ribs 121 are arranged at intervals along the circumference of the annular flange 113. The flow guide ribs 121 are provided in a one-to-one correspondence with the liquid passage holes 103.

[0063] In the embodiment, the plurality of flow guides 121 can form a plurality of rotational flows, and the plurality of liquid passing holes 103 can increase the flow of the cooling liquid, so that the cooling liquid in the heat exchange cavity 102 can flow to the accommodating cavity 101 in time and then flow out, so as to avoid the cooling liquid from staying in the heat exchange cavity 102 for too long, which can cause the temperature of the cooling liquid to rise too high and the cooling effect to decrease, and at the same time, the new cooling liquid with a lower temperature can be continuously supplied to the heat exchange cavity 102, so as to ensure the cooling effect. In addition, the plurality of flow guides 121 can form a plurality of rotational flows, so that the cooling liquid in the heat exchange cavity 102 can be distributed more uniformly, so that the convection heat transfer coefficient of the cooling liquid with each part of the accommodating cavity 101 is uniform, and the temperature of each part of the accommodating cavity 101 can be more uniform, so as to ensure the uniform cooling effect on the electrical device. The number of the flow guides 121 and the liquid passing holes 103 can be set according to the needs, and the plurality of flow guides 121 and the plurality of liquid passing holes 103 can be uniformly arranged in the circumferential direction of the partition plate 111, so as to further ensure the uniformity of heat exchange.

[0064] In one of the embodiments, the rotational flow structure 12 is integrally formed with the shell body 11. For example, the rotational flow structure 12 can be integrally injection molded with the shell body 11, so as to simplify the production process and ensure the structural strength.

[0065] In order to better protect the motor assembly 20, as shown in FIGS. Figure 3 and Figure 7 In one of the embodiments, the accommodating cavity 101 is used for accommodating the rotor 21 and the rotating shaft 23 of the motor assembly 20, and the wall body of the shell body 11 is formed with a plastic packaging cavity 107 used for accommodating the stator 22 of the motor assembly 20.

[0066] Specifically, the stator 22 can be over-molded in the casing 10 by a one-shot injection molding process, or can also be over-molded in the casing 10 by a two-shot injection molding process. For example, the casing 10 can include a stator injection molding body and a housing injection molding body, the stator injection molding body is formed by a two-shot injection molding process, is formed by insert injection molding, at least partially covers the stator 22, and the housing injection molding body is formed by a second injection molding to cover the stator injection molding body, so as to form the over-molding cavity 107 in the peripheral wall 112 of the casing 10. By using the above-mentioned two-shot injection molding method, the strength of the casing 10 can be ensured, the material cost can be saved, the volume of the stator injection molding body is small, the injection molding time is shortened, and the windings and other components of the stator 22 can be prevented from being damaged during injection molding, thereby ensuring the performance reliability of the motor assembly 20. Alternatively, the cooling liquid flow channel 105 is formed in the housing injection molding body, so that when the cooling liquid flows through the cooling liquid flow channel 105, the cooling liquid can be fully heat-exchanged with the stator 22 to cool and lower the temperature of the stator 22. When the cooling liquid flows through the heat exchange cavity 102, the rotational flow is formed by the rotational flow structure 12 in the heat exchange cavity 102, and the rotational flow cooling liquid can be fully heat-exchanged with the rotor 21 and the shaft 23 in the accommodation cavity 101 to cool and lower the temperature of the rotor 21 and the shaft 23. In this way, each component of the motor assembly 20 can be fully cooled and lowered in temperature, and the cooling and lowering effect of the motor assembly 20 is improved.

[0067] The application also provides a power device including the casing 10. The specific structure of the casing 10 is referred to the above-mentioned embodiments. Since the power device adopts all the technical solutions of the above-mentioned embodiments, at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments are achieved, which will not be repeated here. The power device includes but is not limited to the electronic water pump 100, the liquid-cooled motor, etc.

[0068] Please refer to Figures 5 to 7 In an embodiment, the power device is the electronic water pump 100, the electronic water pump 100 further includes a pump shell 30, a pump body 40 and a motor assembly 20, the pump shell 30 is connected with the shell body 11, the pump shell 30 is configured to form a pump body cavity 301 for accommodating the pump body 40, the motor assembly 20 is at least partially accommodated in the accommodation cavity 101, the motor assembly 20 is drivingly connected with the pump body 40, and the pump body cavity 301 is in communication with the heat exchange cavity 102 to deliver cooling liquid to the heat exchange cavity 102.

[0069] In the embodiment, the shell body 11 is formed with a cavity 101 with an open end, the pump shell 30 is connected to the shell body 11 to cover the open end of the cavity 101, the pump shell 30 is formed with a pump cavity 301 inside, and the pump shell 30 is further provided with a liquid inlet 302 and a liquid outlet 303 which are respectively communicated with the pump cavity 301. The pump cavity 301 and the heat exchange cavity 102 can be communicated in various ways. For example, in the embodiment, the shell body 11 is formed with a cooling liquid flow channel 105 in the wall body, and the pump cavity 301 and the heat exchange cavity 102 are communicated through the cooling liquid flow channel 105. Of course, in some embodiments, the pump cavity 301 and the heat exchange cavity 102 can be directly communicated through an external pipeline. The pump body 40 is arranged in the pump cavity 301, and the motor assembly 20 is arranged in the cavity 101. The output shaft of the motor assembly 20 is drivingly connected with the pump body 40. The pump body 40 is driven to move by the motor assembly 20, so that the electronic water pump 100 can suck the cooling liquid into the pump cavity 301 through the liquid inlet 302 and pump out the cooling liquid through the liquid outlet 303. At the same time, the movement of the pump body 40 causes a certain pressure in the pump cavity 301, so that part of the cooling liquid in the pump cavity 301 can enter the cooling liquid flow channel 105 through the liquid inlet port 1051, be transported to the heat exchange cavity 102 through the cooling liquid flow channel 105, and form a rotational flow through the rotational flow structure 12 in the heat exchange cavity 102, thereby improving the cooling effect of the motor assembly 20 in the cavity 101.

[0070] In some embodiments, the partition plate 111 is provided with a liquid passage hole 103 which communicates the heat exchange cavity 102 and the cavity 101. The rotational flow of the cooling liquid in the heat exchange cavity 102 enters the cavity 101 through the liquid passage hole 103, so that the cooling liquid can enter the cavity 101 to further exchange heat with the motor assembly 20, thereby further improving the cooling effect. The cooled cooling liquid flows back to the pump cavity 301 from the cavity 101. In this way, the circulation of the cooling liquid can be realized, and the cooling effect is further improved. The motor assembly 20 specifically includes a rotating shaft 23, a rotor 21 which is sleeved on the outer periphery of the rotating shaft 23, and a stator 22 which surrounds the outer periphery of the rotor 21. In actual application, the motor assembly 20 can be assembled as a whole in the cavity 101, or the rotor 21 and the rotating shaft 23 of the motor assembly 20 can be assembled in the cavity 101, and the stator 22 can be integrally injection molded in the wall body of the shell body 11. The pump body 40 can be a impeller. The rotor 21 of the motor assembly 20 is connected and fixed with the impeller. The rotor 21 is driven to rotate to drive the impeller to rotate, thereby generating a driving force for the electronic water pump 100 to flow the cooling liquid.

[0071] It can be understood that the electronic water pump 100 usually has an electric control 50 (for example, a PCB control board), and the electric control 50 also generates a large amount of heat when the electronic water pump 100 is running. In order to improve the cooling effect of the electric control 50, the setting position of the electric control 50 can be designed according to the specific type and internal structure of the electronic water pump 100. The electric control 50 can be built-in in the casing 10 or externally arranged outside the casing 10. The electric control 50 can include only a single control board or at least two control boards. The specific setting position of the electric control 50 is exemplarily described below.

[0072] As shown in Figure 7 , in one embodiment, the electronic water pump 100 further includes an electric control 50, which is arranged in the casing 10 and adjacent to the heat exchange cavity 102. In this way, the cooling liquid in the heat exchange cavity 102 generates a rotational flow when flowing through the rotational flow structure 12, which can be fully heat-exchanged with the adjacent electric control 50, thereby improving the cooling effect of the electric control 50 and avoiding the failure of the electric control 50 due to excessive temperature rise. Moreover, the electric control 50 is built-in in the casing 10, which can protect the electric control 50 by the casing 10.

[0073] Specifically, referring to Figure 6 and Figure 7 , in the embodiment, the casing 10 further includes a heat-conducting plate 60 and an end cover 80. The heat-conducting plate 60 is arranged opposite to and spaced apart from the partition plate 111, and the heat-conducting plate 60 and the partition plate 111 define the heat exchange cavity 102. The electric control 50 is mounted on the side of the heat-conducting plate 60 away from the partition plate 111, and the end cover 80 covers the side of the electric control plate away from the heat-conducting plate 60. In this way, when the cooling liquid flows through the rotational flow structure 12 in the heat exchange cavity 102, the heat generated by the electric control 50 can be conducted to the cooling liquid through the heat-conducting plate 60, thereby realizing the heat exchange between the cooling liquid and the electric control 50. Moreover, the cooling liquid can generate a rotational flow under the action of the rotational flow structure 12, thereby further improving the cooling effect of the electric control 50. In order to further improve the heat dissipation effect, the heat-conducting plate 60 can be provided with a heat dissipation structure on the side facing the heat exchange cavity 102. Specifically, the heat dissipation structure can include a plurality of heat dissipation ribs arranged along the circumference of the heat-conducting plate 60. Optionally, the plurality of heat dissipation ribs extend obliquely in the same direction to form a certain rotation direction, which can further improve the rotational flow effect.

[0074] Optionally, the electronic water pump 100 further comprises a sealing member 70 sleeved on the periphery of the heat-conducting plate 60, and the heat-conducting plate 60 is sealingly connected with the inner circumferential surface of the annular flange 113 of the shell body 11 through the sealing member 70. In this way, the leakage of the cooling liquid to the area where the electric control 50 is located via the gap between the heat-conducting plate 60 and the annular flange 113 can be avoided, so as to ensure the use safety of the electric control 50. In order to facilitate the connection of the electric control 50 with the external circuit, the end cover 80 is optionally provided with a wire hole 801 corresponding to the wiring terminal of the electric control 50.

[0075] Please refer to Figure 8 In another embodiment, the electronic water pump 100 further comprises an electric control 50, which is arranged on the outer side of the pump shell 30. In this way, the electric control 50 can be directly cooled by the cooling liquid in the pump body cavity 301 of the pump shell 30. Moreover, the pump shell 30 is internally configured to form a rotational flow channel, and when the pump body 40 (for example, an impeller) in the pump shell 30 rotates, a rotational flow can be generated to well cool the electric control 50. Optionally, the electric control 50 can be adhered to the outer side of the pump shell 30 through a heat-conducting adhesive, which is conducive to the heat exchange between the cooling liquid and the electric control 50. Optionally, the outer side of the pump shell 30 is further provided with a protective cover, and the protective cover and the pump shell 30 together form a receiving cavity for accommodating the electric control 50. In this way, the electric control 50 can be prevented from being exposed, and the electric control 50 can be protected.

[0076] As shown in Figure 9 In an embodiment, the electric control 50 can also be arranged on the outer side of the shell body 11. When the wall of the shell body 11 is internally provided with a cooling liquid flow channel 105, the electric control 50 can be cooled by the cooling liquid in the cooling liquid flow channel 105.

[0077] As shown in Figure 10 In an embodiment, the electronic water pump 100 comprises an electric control 50, which comprises a first electric control board 51 and a second electric control board 52. The first electric control board 51 is arranged on the outer side of the pump shell 30, and the second electric control board 52 is arranged in the shell 10 and adjacent to the heat exchange cavity 102.

[0078] In the embodiment, the first electric control board 51 is arranged on the outer side of the pump shell 30, so that the first electric control board 51 can be cooled by the cooling liquid in the pump body cavity 301 of the pump shell 30. When the pump body 40 (for example, the impeller) in the pump shell 30 rotates, a rotational flow is generated, which can effectively cool the first electric control board 51. Alternatively, a protective cover is arranged on the outer side of the pump shell 30, and the protective cover and the pump shell 30 form a receiving cavity for receiving the first electric control board 51, so that the first electric control board 51 is not exposed, and the first electric control board 51 is protected. The second electric control board 52 is arranged in the machine shell 10 and adjacent to the heat exchange cavity 102, so that the cooling liquid in the heat exchange cavity 102 generates a rotational flow when flowing through the rotational flow structure 12, and the second electric control board 52 adjacent to the heat exchange cavity 102 can be fully heat-exchanged, thereby improving the cooling effect of the second electric control board 52. In addition, the second electric control board 52 is arranged in the machine shell 10, and the second electric control board 52 is protected by the machine shell 10.

[0079] It can be understood that the cooling liquid in the pump body cavity 301 has a low temperature and a large flow rate, and the rotation of the pump body 40 in the pump body cavity 301 can form a more obvious rotational flow, so that the cooling effect of the electric control device 50 arranged adjacent to the pump body cavity 301 is better. The low-voltage module and the high-voltage module of the electric control board of the conventional electronic water pump 100 are arranged together. In fact, the low-voltage module of the electric control board has a high heat generation, and needs to be cooled significantly, while the high-voltage module of the electric control board has a low heat generation, and does not need to be designed with a cooling function. In actual application, the first electric control board 51 of the electric control device 50 is arranged with the low-voltage module. Since the first electric control board 51 is arranged adjacent to the pump body cavity 301, the low-voltage module is cooled by the cooling liquid in the pump body cavity 301, and the power increase caused by the flow rate of the cooling liquid is eliminated. The rotational flow channel in the inner side of the pump shell 30 can more effectively reduce the temperature of the low-voltage module of the electric control board and the motor, and improve the service life of the electronic water pump 100. The second electric control board 52 of the electric control device 50 is arranged with the high-voltage module, and the high-voltage module is cooled by the rotational flow cooling liquid in the heat exchange cavity 102. In this way, the low-voltage module and the high-voltage module of the electric control board are arranged separately, the fluid in the pump shell 30 is more focused on cooling the low-voltage module of the electric control board, the arrangement of the cooling channel is reduced, the overall structure is more compact, and the power increase caused by the cooling circulation flow is eliminated.

[0080] The application also provides a vehicle comprising the power device, and the specific structure of the power device is the same as the above-mentioned embodiments. Since the vehicle adopts all the technical solutions of the above-mentioned embodiments, at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments are achieved, and details are not repeated here.

[0081] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural changes made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A housing, characterized by include: The shell body has a partition in its inner cavity, which divides the inner cavity into a receiving cavity and a heat exchange cavity, and the heat exchange cavity is used for the passage of coolant; as well as A swirling structure is provided in the heat exchange cavity to cause the flowing coolant to form a swirling flow. The shell body includes an annular flange surrounding the periphery of the partition and extending toward one side of the partition. The annular flange and the partition together form the heat exchange cavity. The partition has a liquid passage hole communicating between the heat exchange cavity and the receiving cavity. The swirling structure includes a guide rib extending from the side near the annular flange toward the liquid passage hole. The guide rib at least partially surrounds the periphery of the liquid passage hole. A guide groove is provided inside the annular flange, and the extension direction of the guide groove is at an angle to the radial direction of the annular flange.

2. The enclosure of claim 1, wherein, The shell body includes a shell peripheral wall that surrounds the periphery of the partition and extends toward one side of the partition, and the shell peripheral wall and the partition together form the accommodating cavity.

3. The enclosure of claim 2, wherein, The shell peripheral wall has a coolant flow channel inside its wall, and the end face of the shell peripheral wall away from the partition has a liquid inlet port that communicates with the coolant flow channel. The inner peripheral surface of the annular flange has a groove that communicates with the coolant flow channel.

4. The enclosure of claim 1, wherein, The liquid passage is provided with a flow guide cone at one end near the heat exchange cavity, and the flow guide cone is tapered in the direction toward the accommodating cavity.

5. The enclosure of claim 4, wherein, The cone angle of the guide cone is θ, where 0°<θ≤30°.

6. The enclosure of claim 1, wherein, The liquid passage hole is located at the part where the shell peripheral wall meets the partition plate. The inner wall surface of the shell peripheral wall is provided with a flow channel groove corresponding to the liquid passage hole. One end of the flow channel groove is connected to the liquid passage hole, and the other end of the flow channel groove passes through the side of the shell peripheral wall away from the partition plate.

7. The enclosure of claim 1, wherein, Multiple liquid passage holes and multiple flow guide ribs are provided. The multiple liquid passage holes are arranged at intervals along the circumference of the annular flange, and the multiple flow guide ribs are arranged at intervals along the circumference of the annular flange. Each flow guide rib corresponds to one of the liquid passage holes.

8. The enclosure of claim 1, wherein, The swirling structure is integrally formed on the shell body.

9. The enclosure of any one of claims 1 to 8, wherein, The accommodating cavity is used to accommodate the rotor and shaft of the motor assembly, and a plastic-coated cavity for accommodating the stator of the motor assembly is formed in the wall of the housing body.

10. A power plant characterized by Includes the housing as described in any one of claims 1 to 9.

11. The power plant of claim 10, wherein, The power unit is an electronic water pump, which also includes a pump casing, a pump body, and a motor assembly. The pump casing is connected to the casing body and forms a pump body cavity for accommodating the pump body. The motor assembly is at least partially housed in the accommodating cavity and is drivenly connected to the pump body. The pump body cavity communicates with the heat exchange cavity to deliver coolant to the heat exchange cavity.

12. The power plant of claim 11, wherein, The electronic water pump also includes an electrical control unit, which is disposed inside the housing and adjacent to the heat exchange chamber; Alternatively, the electrical control unit may be located on the outer side of the pump housing; Alternatively, the electrical control is located on the outer surface of the shell body; Alternatively, the electrical controls include a first electrical control panel disposed on an outer side of the pump housing and a second electrical control panel disposed within the housing and adjacent to the heat exchange chamber.

13. A vehicle characterized by comprising: A power plant comprising a power plant as claimed in any one of claims 10 to 12.

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