Water pump with flow path control function

Abstract

The water pump with the flow path control function comprises an upper cover and a lower shell, the upper cover and the lower shell are buckled up and down to form a pump cavity and an execution cavity, a pump assembly is arranged in the pump cavity, and a valve actuator assembly is arranged in the execution cavity; the pump assembly comprises a stator assembly, a rotor assembly, a pump shaft, an impeller and a rotary guide plate, the pump shaft is fixedly connected to the upper cover, the lower end of the pump shaft sequentially penetrates through the stator assembly, the rotor assembly and the impeller downwards, the stator assembly is fixedly connected with the pump shaft, the rotor assembly and the impeller are rotatably connected to the pump shaft through a sliding connection structure, and the rotor assembly can drive the impeller to rotate; the rotary flow guide plate is arranged on the periphery of the impeller in a sleeving mode and is in transmission connection with the valve actuator assembly, and the valve actuator assembly can drive the rotary flow guide plate to rotate around the pump shaft to adjust the flow of the water pump. The pump and the valve control plate are integrated in the pump cavity, the axial size is smaller, the structure is more compact, and the overall size of the water pump is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water pumps, and in particular to a water pump with a flow path control function. Background Art

[0002] A car is a highly integrated complex industrial product, which is made up of thousands of parts and assemblies. Each component has unique operating temperature and material temperature tolerance requirements. Ensuring that they operate within a suitable temperature range is the key to ensuring the safe, efficient and stable operation of the car. The automotive thermal management system starts from the perspective of the entire vehicle and finely controls the heat exchange between the vehicle and the environment to maintain the optimal operating temperature range of each component and the comfort of the people in the passenger compartment.

[0003] Taking new energy vehicles as an example, the thermal management system mainly includes a refrigerant circuit and a coolant circuit. The components of the refrigerant circuit include compressors, condensers, evaporators, expansion valves, etc., and the components of the coolant circuit include electronic water pumps, multi-way valves, water tanks, heaters, etc. Among them, the pump is a machine used to transport fluids, and the valve is a machine that changes the direction of fluid flow. In new energy vehicles, fluid pumps are usually used to transport coolants. The coolant switches direction and controls opening and closing through the valve, and circulates in the automotive thermal management system to heat or cool the components. In small new energy electric vehicles, an integrated thermal management system is generally not used, that is, the components are not integrated into an integrated module through carriers such as "valve islands" or "guide plates", and the components are connected by pipelines. The pump and valve are usually two separate components. For example, there is a certain distance between the outlet of the multi-way valve and the inlet of the water pump, and they are connected by a water pipe. This situation not only increases the risk of leakage but also increases the volume and cost occupied by the components. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, the present invention provides a water pump with a flow path control function.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a water pump with a flow control function, including an upper cover, a lower shell, a pump assembly and a valve actuator assembly, the upper cover and the lower shell are buckled together to form a pump chamber and an actuator chamber, the pump assembly is arranged in the pump chamber, and the valve actuator assembly is arranged in the actuator chamber; preferably, the upper cover and the lower shell can be connected by ultrasonic welding or by a sealing ring and bolts.

[0006] The pump assembly includes a stator assembly, a rotor assembly, a pump shaft, an impeller and a rotating guide plate. The stator assembly, the rotor assembly and the impeller are arranged in the pump chamber from top to bottom. The upper end of the pump shaft is fixedly connected to the upper cover, and the lower end extends downward to pass through the stator assembly, the rotor assembly and the impeller in sequence. The stator assembly is fixedly connected to the pump shaft. The rotor assembly and the impeller are both rotatably connected to the pump shaft through a sliding connection structure, and the rotor assembly can drive the impeller to rotate. The rotating guide plate is annular, sleeved on the periphery of the impeller, and located in the fluid cavity of the pump. The fluid cavity is the pump cavity part between the impeller and the lower shell, and is connected to the valve actuator assembly in a transmission manner. The valve actuator assembly can drive the rotating guide plate to rotate around the pump shaft to adjust the flow rate of the water pump. The stator assembly and the rotor assembly together constitute the driving motor of the water pump. The motor can be an axial flux motor or a radial flux motor according to the magnetic flux direction.

[0007] The rotating guide plate is equivalent to the control board of the valve. The pump and the control board of the valve are integrated into the pump cavity, which greatly reduces the overall volume of the water pump. The water pump structure is a disc-type PCB stator pump with a smaller axial dimension and a more compact structure. Among them, the rotor assembly is composed of a permanent magnet and a rotor magnet, and the stator assembly is composed of a stator and a stator magnet. The stator magnet at one end of the stator has a high magnetic flux, which can not only help the stator dissipate heat and bear the stator deformation pressure, but also enhance and concentrate the electromagnetic field.

[0008] In the existing water pump, the flow regulation structure is realized by using multiple components, which is relatively complex, has high assembly requirements and high cost. Therefore, in order to simplify the structure and reduce the cost, further, a convex ring is provided on the upper side of the outer wall surface of the rotating guide plate, and at least a part of the convex ring has side teeth along the circumferential direction. An outlet hole is provided on the side wall of the rotating guide plate below the convex ring. The outlet hole is tangentially arranged, and the inner side is connected with the guide groove arranged on the inner wall surface of the rotating guide plate. When the rotating guide plate rotates, the outlet hole is aligned with a water outlet on the lower shell, or is aligned with two adjacent water outlets according to the hole ratio. The guide groove is involutely arranged on the inner wall of the rotating guide plate.

[0009] The rotating guide plate has the following three functions: first, it fills the axial gap in the same way as the adjusting plate; second, it is connected to the valve actuator assembly in a transmission manner so that the rotating guide plate rotates around the pump shaft, and its rotation is precisely controlled. It can rotate in both clockwise and counterclockwise directions to adjust the flow rate, simplifying the structure, reducing costs, and improving control accuracy; third, the outlet hole rotates circumferentially with the rotation of the rotating guide plate. When the outlet hole is aligned with any one of the multiple water outlets on the lower shell, the fluid will flow out from the corresponding outlet pipe. When the outlet hole overlaps with any two adjacent water outlets, the fluid will flow out from the two outlet pipes in a certain proportion, and the position of the outlet hole and the control of the outlet flow ratio are calibrated by experiments. Preferably, the shape of the outlet hole includes but is not limited to a circular hole or a square hole.

[0010] Furthermore, it also includes a sealing gasket, which is arranged between the rotating guide plate and the lower shell and is located at the water outlet position on the inner side of the lower shell. The outer wall surface of the sealing gasket is fixedly connected to the lower shell, and the inner wall surface of the sealing gasket is smooth and fits with the rotating guide body, and can slide relatively on the fitting surface; the sealing gasket is provided with through holes corresponding to the number and shape of the water outlets on the lower shell, and the sealing gasket around the through holes has ridge-like protrusions.

[0011] The main function of the sealing gasket is to seal the fluid and prevent leakage. The sealing gasket is a rectangular rubber or polytetrafluoroethylene gasket with several through holes in the middle. The number and shape of the through holes are consistent with the outlet pipe hole. There are ridge-like protrusions around the through holes, which can increase the contact pressure between the sealing gasket and the shell wall and enhance the sealing performance. The outer wall surface of the sealing gasket is tightly combined with the lower shell by gluing, and does not rotate with the rotation of the rotating guide plate. The inner wall surface of the sealing gasket is relatively smooth, which can reduce the friction generated with the outer wall of the rotating guide plate during rotation while maintaining the sealing function.

[0012] Furthermore, an adjustment plate is provided between the rotor assembly and the impeller. The main purpose of the adjustment plate is to fill the gap between the impeller and the rotor according to the axial dimension required by the pump and reduce the flow loss in the gap. When the axial dimension of the pump needs to be increased, since the gap between the stator and the rotor directly affects the transmission effect of the electromagnetic force and cannot be changed, the thickness of the adjustment plate can be increased to match the adjustment of the axial dimension; when the axial dimension of the pump needs to be reduced, the thickness of the adjustment plate can be reduced, or even the adjustment plate can be eliminated. The adjustment plate and the rotating guide plate are combined into one by ultrasonic welding.

[0013] Furthermore, the sliding connection structure includes a shaft connecting member, a first sleeve and a second sleeve, the shaft connecting member is sleeved on the pump shaft, the impeller and rotor assembly are both arranged on the outside of the shaft connecting member and have an interference fit with it, the first sleeve and the second sleeve are arranged between the shaft connecting member and the pump shaft, the outer sides of the two are interference fit with the shaft connecting member, and the inner sides are clearance fit with the pump shaft.

[0014] The rotor assembly and the impeller are respectively interference fit with the shaft connection, so that the rotor assembly and the impeller keep moving synchronously. The shaft connection is interference fit with the two sleeves, the sleeve and the pump shaft are clearance fit, the end of the pump shaft is fixed to the upper cover of the water pump, and the pump shaft remains stationary when the water pump is working. When the water pump is working, the rotor assembly rotates, driving the impeller to rotate, and the impeller drives the sleeve and the pump shaft to produce sliding friction. The function of the sleeve is the same as that of the bearing, but the cost is lower.

[0015] Furthermore, the valve actuator assembly includes a motor, a worm, a worm wheel, a transmission shaft, a gear and a Hall sensor. The motor is arranged horizontally, and the Hall sensor is arranged on one side of the motor. The worm is connected to the output shaft of the motor and meshes with the worm wheel. The worm wheel is connected to the upper end of the transmission shaft, and the lower end of the transmission shaft meshes with the gear. The torque output by the motor is transmitted to the gear through the worm, the worm wheel and the transmission shaft in sequence. The transmission ratio range of the motor to the rotating guide plate is 100-500.

[0016] The motor can be a brushed motor or a brushless motor, which can be selected according to the needs. The worm wheel, transmission shaft and gear constitute a gear set. The gear set is a long rod (i.e., transmission shaft) containing upper end teeth (i.e., worm wheel) and lower end teeth (i.e., gears). The upper end teeth mesh with the worm extended from the motor, and the lower end teeth of the gear set mesh with the side teeth of the rotating guide plate. The motor can drive the worm to rotate the gear set, thereby driving the rotating guide plate to rotate through the lower end teeth. The main purpose of using the gear set structure is to increase the transmission ratio, which is conducive to accurately controlling the rotation angle of the outlet hole of the rotating guide plate and making the flow control more accurate. A Hall sensor is set inside the valve actuator to help improve the control accuracy of the brushed motor.

[0017] Furthermore, the upper cover is provided with an electrical interface, which is connected to the upper cover. The bottom of the lower shell is provided with a water inlet, and the side of the lower shell is provided with multiple water outlets. Preferably, the number of water outlets is 2-5, and the water inlet is used for water intake, and the water outlet is used for water discharge.

[0018] Furthermore, the water inlet is provided with an inlet pipe, the water outlet is provided with an outlet pipe, and the outlet pipe is arranged at an angle with the side wall of the lower shell, and the inclination direction is along the streamline of the water flow direction of the water outlet, and the angle between adjacent outlet pipes is less than 30°. This structure makes the arrangement of several outlet pipes more compact, and also facilitates the alignment and adjustment of the outlet hole of the guide plate and each outlet pipe hole. At the same time, this arrangement method saves the working area of ​​the sealing gasket and reduces the cost.

[0019] Furthermore, it also includes a thermal management module, which is provided with an installation cavity that matches the external shape of the lower shell, and the lower shell is embedded in the installation cavity. The bottom of the thermal management module is provided with an inlet pipe that is connected to the water inlet on the lower shell, and one side of the thermal management module is provided with multiple outlet pipes, the number of the outlet pipes is the same as the number of the water outlets, and the installation cavity is provided with multiple connecting channels, which connect the water outlets and the outlet pipes one by one.

[0020] Furthermore, it also includes a water pump controller. In order to reduce the cost of the product and the volume occupied by the controller, the water pump controller is improved. The water pump controller includes a micro control unit, a power supply, a water pump drive unit and a motor drive unit integrated on the same PCB circuit board, wherein the micro control unit is connected to the water pump drive unit through an inverter rectifier module, the micro control unit is connected to the motor drive unit through an H-bridge rectifier module, and the power supply is respectively connected to the micro control unit, the inverter rectifier module and the H-bridge rectifier module through lines to provide a working voltage; an external signal is input into the micro control unit, the micro control unit adjusts the output of the inverter rectifier module according to the external signal, and controls the water pump drive unit through the inverter rectifier module to provide a drive signal to the water pump, and at the same time, the micro control unit adjusts the output of the H-bridge rectifier module according to the external signal, and controls the motor drive unit through the H-bridge rectifier module to provide a drive signal to the motor. The original water pump controller and motor controller are integrated to save control chips and their auxiliary components, and reduce costs. In addition, the water pump controller circuit board and the motor controller circuit board that were originally designed separately are combined into one, which reduces the space occupied by circuit components, thereby facilitating the miniaturization and flattening design of the water pump.

[0021] The beneficial effects of the present invention are: (1) The disc-type PCB stator pump adopts an axial magnetic flux structure, which greatly reduces the axial size and makes the structure more compact; (2) A single component rotating guide plate is used to adjust the flow rate, which has a simple structure. The alignment of the rotating guide plate and the outlet pipe hole can better perform outlet switching and flow rate ratio control; (3) The valve actuator uses a brushed motor plus a gear set structure, which, together with the Hall sensor, can achieve a high reduction ratio of more than 120 and precise motor control, with the advantages of low cost and high precision; (4) The regulating plate structure can fill the gap between the rotor and the impeller according to the change of the axial dimension, reducing the flow loss caused by the gap; (5) The layout of the outlet pipe can reduce the sealing gasket area and facilitate flow ratio adjustment; (6) The water pump adopts a modular design, which can be configured with an outlet pipe and can also be quickly integrated with the thermal management module, with good system integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a structural schematic diagram of a water pump embodiment 1 of the present invention.

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the medium-sized water pump.

[0025] Figure 3 It is a schematic diagram of the explosion structure of the first embodiment.

[0026] Figure 4 yes Figure 2 An enlarged schematic diagram of the sliding connection structure at A in the middle.

[0027] Figure 5 It is a structural schematic diagram of a rotating guide plate.

[0028] Figure 6 It is a structural schematic diagram of a rotating guide plate.

[0029] Figure 7 It is a schematic diagram of the structure of the sealing gasket.

[0030] Figure 8 It is a schematic structural diagram of a second water pump embodiment of the present invention.

[0031] Fig. 9 This is a schematic diagram of the water pump controller.

[0032] Fig.10 It is a schematic diagram of the working state when the outlet hole of the rotating guide plate is aligned with the first outlet pipe.

[0033] Fig.11 It is a schematic diagram of the working state when the outlet hole of the rotating guide plate is between two outlet pipes.

[0034] In the figure: 1. Upper cover, 1.1. Electrical interface, 2. Lower shell, 2.1. Water inlet, 2.2. Water outlet, 3. Pump assembly, 3.1. Stator, 3.2. Stator magnet, 3.3. Permanent magnet, 3.4. Rotor magnet, 3.5. Adjustment plate, 3.6. Pump shaft, 3.7. Impeller, 3.8. Rotating guide plate, 3.81. Convex ring, 3.82. Side teeth, 3.83. Outlet hole, 3.84. Guide groove, 3.9. Sealing gasket, 3.91. Through hole, 3.10. Shaft connector, 3.11. First sleeve, 3.12. Second sleeve, 4. Valve actuator assembly, 4.1. Motor, 4.2. Worm, 4.3. Worm wheel, 4.4. Drive shaft, 4.5. Gear, 5. Inlet pipe, 6. Outlet pipe, 7. Thermal management module, 7.1. Installation cavity. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents. Embodiment 1

[0036] like Figure 1 As shown, a water pump with flow path control function of the present invention comprises an upper cover 1, a lower shell 2, a pump assembly 3 and a valve actuator assembly 4. The upper cover 1 and the lower shell 2 are buckled together to form a pump chamber and an actuator chamber. The pump assembly 3 is arranged in the pump chamber, and the valve actuator assembly 4 is arranged in the actuator chamber. In this embodiment, the upper cover 1 and the lower shell 2 can be connected by ultrasonic welding or by a sealing ring and bolts. The upper cover 1 is provided with an electrical interface 1.1, which is connected to the upper cover 1. The bottom of the lower shell 2 is provided with a water inlet 2.1, and the side of the lower shell 2 is provided with a plurality of water outlets 2.2. As a preferred number of water outlets 2.2, there are three water outlets 2.2 in this embodiment. The water inlet 2.1 is used for water inlet, and the water outlet 2.2 is used for water outlet. The water inlet 2.1 is provided with an inlet pipe 5, and the water outlet 2.2 is provided with an outlet pipe 6, and the outlet pipe 6 is arranged at an angle with the side wall of the lower shell 2, and its inclination direction follows the streamline of the water flow direction of the water outlet 2.2, and the angle between adjacent outlet pipes 6 is less than 30°. This structure makes the arrangement of several outlet pipes 6 more compact, and also facilitates the alignment and adjustment of the guide plate outlet hole 3.83 and each outlet pipe 6 hole. At the same time, this arrangement method saves the working area of ​​the sealing gasket 3.9 and reduces the cost.

[0037] like Figure 2 and Figure 3As shown, the valve actuator assembly 4 includes a motor 4.1, a worm 4.2, a worm wheel 4.3, a transmission shaft 4.4, a gear 4.5 and a Hall sensor. The motor 4.1 is arranged horizontally, and the Hall sensor is arranged on one side of the motor 4.1. The worm 4.2 is connected to the output shaft of the motor 4.1 and meshes with the worm wheel 4.3. The worm wheel 4.3 is connected to the upper end of the transmission shaft 4.4, and the lower end of the transmission shaft 4.4 meshes with the gear 4.5. The torque output by the motor 4.1 is transmitted to the gear 4.5 via the worm 4.2, the worm wheel 4.3 and the transmission shaft 4.4 in sequence. The motor 4.1 can adopt a brushed motor or a brushless motor, which can be selected according to needs. The worm wheel 4.3, the transmission shaft 4.4 and the gear 4.5 constitute a gear set. The gear set is a long rod (i.e., the transmission shaft 4.4) including upper end teeth (i.e., the worm wheel 4.3) and lower end teeth (i.e., the gear 4.5). The upper end teeth are meshed with the worm 4.2 extending from the motor 4.1, and the lower end teeth of the gear set are meshed with the side teeth 3.82 of the rotating guide plate 3.8. The motor 4.1 can drive the worm 4.2 to rotate the gear set, thereby driving the rotating guide plate 3.8 to rotate through the lower end teeth. The main purpose of using the gear set structure is to increase the transmission ratio. As a preferred embodiment, the transmission ratio of the motor to the rotating guide plate ranges from 100 to 500. In this embodiment, the transmission ratio is designed to reach 120, which is conducive to accurately controlling the rotation angle of the outlet hole 3.83 of the rotating guide plate 3.8, so that the flow control is more accurate. A Hall sensor is arranged inside the valve actuator to help improve the control accuracy of the brushed motor 4.1. The pump assembly 3 includes a stator assembly, a rotor assembly, a pump shaft 3.6, an impeller 3.7 and a rotating guide plate 3.8, wherein the stator assembly is composed of a stator 3.1 and a stator magnet 3.2, and the rotor assembly is composed of a permanent magnet 3.3 and a rotor magnet 3.4. The stator magnet 3.2, the stator 3.1, the permanent magnet 3.3, the rotor magnet 3.4 and the impeller 3.7 are sequentially arranged in the pump cavity from top to bottom. The upper end of the pump shaft 3.6 is fixedly connected to the upper cover 1, and the lower end extends downward to pass through the stator magnet 3.2, the stator 3.1, the permanent magnet 3.3, the rotor magnet 3.4 and the impeller 3.7 in sequence. The stator magnet 3.2 at one end of the stator 3.1 has a higher magnetic flux, which can not only help the stator 3.1 to dissipate heat and bear the deformation pressure of the stator 3.1, but also enhance and concentrate the electromagnetic field. The stator assembly is fixedly connected to the pump shaft 3.6, the rotor assembly and the impeller 3.7 are both rotatably connected to the pump shaft 3.6 through a sliding connection structure, and the rotor assembly can drive the impeller 3.7 to rotate, the rotating guide plate 3.8 is annular, sleeved on the periphery of the impeller 3.7, and located in the fluid cavity of the pump, which is the pump cavity part between the impeller 3.7 and the lower shell 2, and is connected to the valve actuator assembly 4 in a transmission manner, and the valve actuator assembly 4 can drive the rotating guide plate 3.8 to rotate around the pump shaft 3.6 to adjust the flow rate of the water pump. The rotating guide plate 3.8 is equivalent to the control board of the valve, and the pump and the control board of the valve are integrated into the pump cavity, which greatly reduces the overall volume of the water pump.An adjustment plate 3.5 is also provided between the rotor assembly and the impeller 3.7. The main purpose of the adjustment plate 3.5 is to fill the gap between the impeller 3.7 and the rotor according to the axial dimension required by the pump, and reduce the flow loss in the gap. When the axial dimension of the pump needs to be increased, since the gap between the stator and the rotor directly affects the transmission effect of the electromagnetic force and cannot be changed, the thickness of the adjustment plate 3.5 can be increased to match the adjustment of the axial dimension; when the axial dimension of the pump needs to be reduced, the thickness of the adjustment plate 3.5 can be reduced, or even the adjustment plate 3.5 can be eliminated. The adjustment plate 3.5 and the rotating guide plate 3.8 are combined into one by ultrasonic welding.

[0038] like Figure 4 As shown, the sliding connection structure includes a shaft connection member 3.10, a first sleeve 3.11 and a second sleeve 3.12. The shaft connection member 3.10 is sleeved on the pump shaft 3.6. The impeller 3.7 and the rotor assembly are both arranged on the outside of the shaft connection member 3.10 and have an interference fit with it. The first sleeve 3.11 and the second sleeve 3.12 are arranged between the shaft connection member 3.10 and the pump shaft 3.6. The outer sides of the two sleeves have an interference fit with the shaft connection member 3.10, and the inner sides have a clearance fit with the pump shaft 3.6. The rotor assembly and the impeller 3.7 have an interference fit with the shaft connection member 3.10 respectively, so that the rotor assembly and the impeller 3.7 maintain synchronous movement. The shaft connection member 3.10 has an interference fit with the two sleeves, and the sleeve has a clearance fit with the pump shaft 3.6. The end of the pump shaft 3.6 is fixed to the upper cover 1 of the water pump, and the pump shaft 3.6 remains stationary when the water pump is working. When the water pump is working, the rotor assembly rotates, driving the impeller 3.7 to rotate, and the impeller 3.7 drives the sleeve to generate sliding friction with the pump shaft 3.6. The function of the sleeve is the same as that of the bearing, but the cost is lower.

[0039] like Figure 5 and Figure 6 As shown, a convex ring 3.81 is provided on the upper side of the outer wall of the rotating guide plate 3.8, and at least a part of the convex ring 3.81 is provided with side teeth 3.82 along the circumferential direction. An outlet hole 3.83 is provided on the side wall of the rotating guide plate 3.8 below the convex ring 3.81. The outlet hole 3.83 is tangentially arranged, and the inner side is connected with the guide groove 3.84 arranged on the inner wall of the rotating guide plate 3.8. When the rotating guide plate 3.8 rotates, the outlet hole 3.83 is aligned with a water outlet 2.2 on the lower shell 2, or is aligned with two adjacent water outlets 2.2 according to the hole ratio. Figure 6 As shown, the guide groove 3.84 is involutely arranged on the inner wall of the rotating guide plate 3.8. Preferably, the shape of the outlet hole 3.83 includes but is not limited to a circular hole or a square hole. In this embodiment, the outlet hole 3.83 is a circular hole.

[0040] like Figure 3 and Figure 7As shown, it also includes a sealing gasket 3.9, which is arranged between the rotating guide plate 3.8 and the lower shell 2, and is located at the water outlet 2.2 on the inner side of the lower shell 2. The main function of the sealing gasket 3.9 is to seal the fluid and prevent leakage. The sealing gasket 3.9 is a rectangular rubber or polytetrafluoroethylene gasket with several through holes 3.91 in the middle. The number and shape of the through holes 3.91 are consistent with the holes of the outlet pipe 6 on the lower shell 2. There are ridge-like protrusions around the through holes 3.91, which can increase the contact pressure between the sealing gasket 3.9 and the shell wall and enhance the sealing performance. The outer wall surface of the sealing gasket 3.9 is tightly combined with the lower shell 2 by gluing, and does not rotate with the rotation of the rotating guide plate 3.8. The inner wall surface of the sealing gasket 3.9 is relatively smooth, which can reduce the friction generated with the outer wall of the rotating guide plate 3.8 during rotation, while maintaining the sealing function. Embodiment 2

[0041] like Figure 8 As shown, the difference between this embodiment and embodiment one is that the water inlet 2.1 and the water outlet 2.2 of the lower shell 2 are not connected to corresponding pipelines, but a thermal management module 7 is added, and the thermal management module 7 is provided with a mounting cavity 7.1 that matches the external shape of the lower shell 2, and the lower shell 2 is embedded in the mounting cavity 7.1, and the water pump is installed on the thermal management module 7 as a whole. The bottom of the thermal management module 7 is provided with an inlet pipe 5 that is connected to the water inlet 2.1 on the lower shell 2, and one side of the thermal management module 7 is provided with a plurality of outlet pipes 6, and the number of the outlet pipes 6 is the same as the number of the water outlets 2.2, and the mounting cavity 7.1 is provided with a plurality of connecting channels, which connect the water outlets 2.2 and the outlet pipes 6 one by one.

[0042] like Fig. 9As shown, the water pumps of Embodiment 1 and Embodiment 2 also include a water pump controller, which includes a microcontroller unit, a power supply, a water pump drive unit and a motor drive unit integrated on the same PCB circuit board, wherein the microcontroller unit is connected to the water pump drive unit through an inverter rectifier module, the microcontroller unit is connected to the motor drive unit through an H-bridge rectifier module, and the power supply is respectively connected to the microcontroller unit, the inverter rectifier module and the H-bridge rectifier module through lines to provide a working voltage; an external signal is input to the microcontroller unit, the microcontroller unit adjusts the output of the inverter rectifier module according to the external signal, and controls the water pump drive unit through the inverter rectifier module to provide a drive signal to the water pump, and at the same time, the microcontroller unit adjusts the output of the H-bridge rectifier module according to the external signal, and controls the motor drive unit through the H-bridge rectifier module to provide a drive signal to the motor. In this embodiment, the microcontroller unit adopts the pre-driver chip model MLX81340 launched by Melexis; the H-bridge rectifier module adopts a rectifier circuit composed of four field effect transistors to control the forward and reverse rotation of the motor, and has detection functions such as stall and overcurrent; the inverter rectifier module adopts a rectifier circuit composed of six field effect transistors to control the operation of the water pump; in addition, temperature detection and Hall counting are added to the water pump controller to improve control accuracy.

[0043] Working principle: In this embodiment, three outlet pipes 6 are used as examples to illustrate the working principle. The outlet pipes 6 are respectively marked as 5a, 5b, and 5c. The main working process is as follows: the fluid enters the fluid cavity of the water pump through the inlet pipe 5, and the impeller 3.7 is driven to rotate by the rotor assembly, and obtains energy and is thrown out in the radial direction. The fluid flows into the inlet pipe 6 through the outlet hole 3.83 of the rotating guide plate 3.8 and flows out of the entire component.

[0044] When the fluid direction needs to be switched, the motor 4.1 in the valve actuator starts to drive the gear set to rotate. Since the lower end teeth of the gear set mesh with the side teeth of the rotating guide plate 3.8, the rotation of the gear set will drive the rotating guide plate 3.8 to rotate along the water pump shaft 3.6, causing the outlet hole 3.83 of the rotating guide plate 3.8 to move circumferentially. Fig.10 As shown, when the outlet hole 3.83 of the rotating guide plate 3.8 is aligned with the first outlet pipe 5a, the fluid flows out from the outlet of the outlet pipe 5a, and the same applies when it is aligned with the outlet pipes 5b and 5c.

[0045] like Fig.11 As shown, when the outlet hole 3.83 of the rotating guide plate 3.8 is between the outlet pipes 5a and 5b (the through hole 3.91 of the sealing gasket 3.9 is used as an example in the figure), the rotating guide plate 3.8 has a proportional adjustment function, and the flow rate ratio of the two outflowing fluids can be changed according to the overlapping area of ​​the outlet hole 3.83 of the rotating guide plate 3.8 and the two outlet pipes. When the outlet hole 3.83 is between the outlet pipes 5b and 5c, the principle is the same as above.

[0046] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the scope of the present invention through the above description. The technical scope of this invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A water pump with flow path control function, characterized in that: It includes an upper cover, a lower shell, a pump assembly and a valve actuator assembly, wherein the upper cover and the lower shell are buckled with each other to form a pump cavity and an actuator cavity, the pump assembly is arranged in the pump cavity, and the valve actuator assembly is arranged in the actuator cavity; The pump assembly includes a stator assembly, a rotor assembly, a pump shaft, an impeller and a rotating guide plate. The stator assembly, rotor assembly and impeller are arranged in the pump chamber from top to bottom in sequence. The upper end of the pump shaft is fixedly connected to the upper cover, and the lower end extends downward to pass through the stator assembly, the rotor assembly and the impeller in sequence. The stator assembly is fixedly connected to the pump shaft, and the rotor assembly and the impeller are rotatably connected to the pump shaft through a sliding connection structure, and the rotor assembly can drive the impeller to rotate. The rotating guide plate is annular, sleeved on the periphery of the impeller, and is transmission-connected to the valve actuator assembly. The valve actuator assembly can drive the rotating guide plate to rotate around the pump shaft to adjust the flow rate of the water pump.

2. The water pump with flow path control function according to claim 1, characterized in that: A convex ring is provided on the upper side of the outer wall surface of the rotating guide plate, and at least a partial area of ​​the convex ring is provided with side teeth along the circumferential direction. An outlet hole is provided on the side wall of the rotating guide plate below the convex ring. The outlet hole is tangentially arranged, and the inner side is connected with the guide groove arranged on the inner wall surface of the rotating guide plate. When the rotating guide plate rotates, the outlet hole is aligned with a water outlet on the lower shell, or is aligned with two adjacent water outlets according to the hole opening ratio.

3. The water pump with flow path control function according to claim 1, characterized in that: It also includes a sealing gasket, which is arranged between the rotating guide plate and the lower shell and is located at the water outlet position on the inner side of the lower shell. The outer wall surface of the sealing gasket is fixedly connected to the lower shell, and the inner wall surface of the sealing gasket is smooth and fits with the rotating guide body, and can slide relatively on the fitting surface; the sealing gasket is provided with through holes corresponding to the number and shape of the water outlets on the lower shell, and the sealing gasket around the through holes has ridge-like protrusions.

4. The water pump with flow path control function according to claim 1, characterized in that: An adjusting plate is also provided between the rotor assembly and the impeller.

5. The water pump with flow path control function according to claim 1, characterized in that: The sliding connection structure includes a shaft connecting member, a first sliding sleeve and a second sliding sleeve. The shaft connecting member is sleeved on the pump shaft. The impeller and rotor assembly are both arranged on the outside of the shaft connecting member and have an interference fit with it. The first sliding sleeve and the second sliding sleeve are arranged between the shaft connecting member and the pump shaft. The outer sides of the two are interference fit with the shaft connecting member, and the inner sides are clearance fit with the pump shaft.

6. The water pump with flow path control function according to any one of claims 1 to 5, characterized in that: The valve actuator assembly includes a motor, a worm, a worm wheel, a transmission shaft, a gear and a Hall sensor. The motor is arranged horizontally, and the Hall sensor is arranged on one side of the motor. The worm is connected to the output shaft of the motor and meshes with the worm wheel. The worm wheel is connected to the upper end of the transmission shaft, and the lower end of the transmission shaft meshes with the gear. The torque output by the motor is transmitted to the gear through the worm, the worm wheel and the transmission shaft in sequence. The transmission ratio range of the motor to the rotating guide plate is 100-500.

7. The water pump with flow path control function according to claim 1, characterized in that: The upper cover is provided with an electrical interface, the bottom of the lower shell is provided with a water inlet, and the side of the lower shell is provided with a plurality of water outlets.

8. The water pump with flow path control function according to claim 7, characterized in that: The water inlet is provided with an inlet pipe, the water outlet is provided with an outlet pipe, and the outlet pipe is inclined to the side wall of the lower shell, and its inclination direction follows the streamline of the water flow direction of the water outlet, and the angle between adjacent outlet pipes is less than 30°.

9. The water pump with flow path control function according to claim 7, characterized in that: It also includes a thermal management module, which is provided with an installation cavity that matches the external shape of the lower shell, and the lower shell is embedded in the installation cavity. The bottom of the thermal management module is provided with an inlet pipe that is connected to the water inlet on the lower shell, and one side of the thermal management module is provided with multiple outlet pipes, and the number of the outlet pipes is the same as the number of the water outlets. The installation cavity is provided with multiple connecting channels, which connect the water outlets and the outlet pipes one by one.

10. The water pump with flow path control function according to any one of claims 1-5 and 7-9, characterized in that: It also includes a water pump controller, which includes a microcontroller unit, a power supply, a water pump drive unit and a motor drive unit integrated on the same PCB circuit board, wherein the microcontroller unit is connected to the water pump drive unit through an inverter rectifier module, the microcontroller unit is connected to the motor drive unit through an H-bridge rectifier module, and the power supply is respectively connected to the microcontroller unit, the inverter rectifier module and the H-bridge rectifier module through lines to provide a working voltage; an external signal is input into the microcontroller unit, the microcontroller unit adjusts the output of the inverter rectifier module according to the external signal, and controls the water pump drive unit through the inverter rectifier module to provide a drive signal to the water pump, and at the same time, the microcontroller unit adjusts the output of the H-bridge rectifier module according to the external signal, and controls the motor drive unit through the H-bridge rectifier module to provide a drive signal to the motor.

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