Electric pump, control method and control system of electric pump and integrated assembly

Abstract

The electric pump comprises a pump rotor assembly, a motor rotor assembly, a control panel assembly and a shaft, the shaft is in transmission connection with the pump rotor assembly and the motor rotor assembly, the electric pump is provided with a first cavity and a second cavity, the pump rotor assembly is located in the first cavity, the control panel assembly is located in the second cavity, and the electric pump is provided with a first channel. The first channel is provided with an outlet in the shaft, the control panel assembly comprises a detection unit, the detection unit and the outlet of the first channel are correspondingly arranged, and the detection unit can detect the pressure value and / or the temperature value of the working medium located in the second cavity; in this way, the influence of the temperature in the electric pump on the detection unit can be reduced; the invention further discloses an integrated assembly which comprises the electric pump and a liquid storage device. The invention further discloses a control method and a control system.

Description

[Technical field]

[0001] The present application relates to the field of vehicles, and in particular to components of a vehicle lubrication system and / or cooling system. [Background technology]

[0002] The electric pump can be used in the automobile lubrication system and / or cooling system and can provide flow circulation power for the working medium in the automobile lubrication system and / or cooling system. The electric pump may be provided with a detection unit for detecting whether the operating status of the electric pump and / or the system is normal. The detection unit will be affected by the temperature inside the electric pump. How to reduce the impact of the temperature inside the electric pump on the detection unit is a technical issue that technicians in this field need to consider. [Summary of the invention]

[0003] The object of the present invention is to provide an electric pump, a control method for an electric pump, a control system and an integrated component, which are helpful to reduce the influence of the temperature inside the electric pump on the detection unit.

[0004] To achieve the above-mentioned purpose, an embodiment provided in the present application adopts the following technical solution: an electric pump, the electric pump includes a pump rotor assembly, a motor rotor assembly, a control board assembly and a shaft, the shaft is transmission-connected to the pump rotor assembly, the shaft is transmission-connected to the motor rotor assembly, the electric pump has a first cavity and a second cavity, the pump rotor assembly is located in the first cavity, the control board assembly is located in the second cavity, the electric pump has a first channel, the first channel has an outlet on the shaft, the control board assembly includes a detection unit, the detection unit is arranged corresponding to the outlet of the first channel, and the detection unit can detect the pressure value and / or temperature value of the working medium located in the second cavity.

[0005] One embodiment of the present application also provides an integrated component, including a liquid reservoir and the above-mentioned electric pump, the liquid reservoir has a liquid storage chamber, the liquid storage chamber is used to store the working medium, the electric pump includes an inlet channel, the first port of the inlet channel is connected to the liquid storage chamber, and the second port of the inlet channel is connected to the first chamber.

[0006] An embodiment of the present application further provides a control method, which can be used to detect the pressure and / or temperature of the working medium in the second chamber of the upper electric pump, and the control method includes the following steps:

[0007] Acquiring a current pressure value and / or temperature value of the working medium in the second chamber;

[0008] Determine whether the current pressure value is less than a preset pressure threshold; if so, determine that the current liquid level state in the liquid reservoir is abnormal or the electric pump is in a dry-running state; if not, determine that the current liquid level state in the liquid reservoir is normal or the electric pump is operating normally; and / or determine whether the current temperature value is less than a preset temperature threshold; if so, determine that the temperature of the working medium in the current electric pump is normal; if not, determine that the temperature of the working medium in the current electric pump is abnormal.

[0009] An implementation of the present application further provides a control system, a detection unit, for detecting a current pressure value of the working medium in the second chamber;

[0010] A detection unit, used to detect a current pressure value and / or temperature value of the working medium in the second chamber;

[0011] a judging unit, for judging whether the current pressure value is less than a preset pressure threshold; if so, judging that the current liquid level state in the liquid reservoir is abnormal or the electric pump is in a dry running state; if not, judging that the current liquid level state in the liquid reservoir is normal or the electric pump is operating normally;

[0012] And / or determine whether the current temperature value is less than a preset temperature threshold; if yes, determine that the temperature of the working medium in the current electric pump is normal; if no, determine that the temperature of the working medium in the current electric pump is abnormal.

[0013] In one embodiment of the present application, the control board assembly is located in the second cavity, the electric pump has a first channel, the first channel has an outlet on the shaft, the control board assembly includes a detection unit, the detection unit can detect the pressure and / or temperature of the working medium located in the second cavity, the detection unit is arranged corresponding to the outlet of the first channel, the working medium can enter the second cavity through the first channel, in this way, the working medium can directly enter the second cavity, the detection unit is arranged corresponding to the outlet of the first channel, the detection unit can contact the working medium flowing out of the outlet of the first channel for the first time, reduce the influence of other components, such as the heat generated by the stator assembly and / or the control board assembly on the detection unit, and thus help to improve the detection accuracy of the detection unit.

[0014] In one embodiment of the present application, an integrated component is also provided, including the electric pump and the liquid reservoir as described above. In this way, the detection unit is integrated into the electric pump, which is conducive to simplifying the structure of the integrated component.

[0015] In one embodiment of the present application, a control method is also provided, which obtains the current pressure value and / or temperature value of the working medium in the second chamber; determines whether the current pressure value is less than a preset pressure threshold and / or determines whether the current temperature value is less than a preset temperature threshold; in this way, it is helpful to simplify the control method of the external host computer.

[0016] In one embodiment of the present application, a control system is also provided, in which a detection unit and a judgment unit are integrated into a controller of the electric pump, which is conducive to simplifying the control system of an external host computer.

Brief Description of the Drawings

[0017] Figure 1 It is a structural schematic diagram of the position where the electric pump and the liquid reservoir are installed in the integrated assembly of the present application;

[0018] Figure 2 yes Figure 1 A schematic diagram of a three-dimensional structure of a first embodiment of the electric pump;

[0019] Figure 3 yes Figure 2 A schematic diagram of the structure of the first embodiment of the electric pump along the XX section;

[0020] Figure 4 yes Figure 2 A schematic diagram of a three-dimensional structure of a stator assembly of a first embodiment of an electric pump;

[0021] Figure 5 yes Figure 2 A schematic diagram of the exploded structure of the stator assembly and the control panel assembly of the first embodiment of the electric pump;

[0022] Figure 6 yes Figure 2 A schematic diagram of the three-dimensional structure of the first embodiment of the middle pump housing at one viewing angle;

[0023] Figure 7 yes Figure 2 A schematic diagram of the three-dimensional structure of the first embodiment of the middle pump housing from another viewing angle;

[0024] Figure 8 yes Figure 2 A schematic diagram of the structure of the second channel of the first embodiment of the electric pump in the orthographic projection at the bottom;

[0025] Fig. 9 yes Figure 2 A schematic diagram of a three-dimensional structure of the first embodiment at one viewing angle without installing the pump housing and the pump rotor assembly;

[0026] Fig.10 yes Figure 2 A schematic diagram of the motor housing structure from a top view;

[0027] Fig.11 yes Fig.10 A schematic diagram of the cross-sectional structure of the motor housing along the ZZ direction;

[0028] Fig.12 yes Figure 1 A schematic diagram of the C-direction structure of the installation position of the detection unit of the second embodiment of the electric pump relative to the inlet channel;

[0029] Fig.13 yes Figure 2 A schematic cross-sectional view of a first embodiment of the relative position of the shaft of the electric pump and the detection unit;

[0030] Fig.14 yes Figure 2 A schematic cross-sectional view of a second embodiment of the phase position between the shaft of the electric pump and the detection unit;

[0031] Fig.15 yes Figure 2 A schematic diagram of a three-dimensional structure of an embodiment of a control panel assembly of an electric pump in a viewing angle;

[0032] Fig.16 yes Figure 2 A schematic diagram of a three-dimensional structure of an embodiment of a control panel assembly of an electric pump in another viewing angle;

[0033] Fig.17 It is a schematic diagram of the flow structure of a control method in one embodiment of an electric pump;

[0034] Fig.18 It is a schematic diagram of the flow structure of a control system in one embodiment of an electric pump;

[0035] Fig.19 yes Figure 1 A schematic cross-sectional structure diagram of a second embodiment of the electric pump in one direction;

[0036] Fig. 20 yes Figure 2 A schematic cross-sectional view of an embodiment of a shaft of an electric pump;

[0037] Fig.21 yes Fig.19 A schematic cross-sectional structure diagram of an embodiment of the relative position of the shaft of the electric pump and the detection unit;

[0038] In the attached figure:

[0039] 100. Electric pump;

[0040] 11. housing; 111. pump housing; 1111. inlet channel; 1112. outlet channel; 1113. auxiliary channel; 1111a. first port; 1111b. second port; 112. motor housing; 113. bottom cover;

[0041] 12. Pump rotor assembly; 121. First rotor; 122. Second rotor;

[0042] 13. stator assembly; 131. stator core; 132. insulation frame; 133. winding;

[0043] 14. Motor rotor assembly;

[0044] 15. Control board assembly; 151. Base plate; 1511. Front side; 1512. Back side; 152. Detection unit; 1521. Varistor; 1522. Thermistor;

[0045] 16, shaft; 161, first channel; 162, lateral channel; 161', outlet channel; 1611, outlet; 163, end; 164, outer side;

[0046] 17, first chamber; 171, second channel; 1711, bottom;

[0047] 18, second cavity; 19, third cavity; 20, insertion pin; 21, limiting part; 22, matching part; 23, volume cavity; 231, first area; 232, second area; L1, first dividing line; L2, second dividing line; A, first contact point; B, second contact point; X1, center line of the shaft; X2, center line of the lateral channel; Y, angle between the center line of the shaft and the center line of the lateral channel; L3, trajectory of the working medium flowing out of the outlet;

[0048] 200, liquid reservoir; 201, liquid storage chamber; 202, reference liquid level surface; 300, integrated component. [Specific implementation method]

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0050] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings. First of all, it should be noted that the directional terms such as up, down, left, right, front, back, inside, outside, top, bottom, etc. mentioned or may be mentioned in the specification of the present invention are defined relative to the structure shown in the corresponding drawings. They are relative concepts, and therefore may change accordingly according to their different locations and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0051] The electric pump can be applied to the automobile lubrication system and / or cooling system, and can provide flow circulation power for the working medium in the automobile lubrication system and / or cooling system. The automobile lubrication system and / or cooling system can provide lubricating oil and / or cooling oil for the transmission system.

[0052] Reference Figures 1 to 3 As shown, the integrated component 300 in the automobile lubrication system and / or cooling system is provided with a reservoir 200 for storing working medium. Specifically, the reservoir 200 has a liquid storage chamber 201, in which working medium is stored, and the inlet channel 1111 of the electric pump 100 is connected to the liquid storage chamber 201. The electric pump 100 pumps the working medium in the liquid storage chamber 201 to the drive motor and / or gear box to cool the drive motor and / or lubricate the gear box. If the liquid level of the working medium in the reservoir is lower than the oil inlet of the electric pump 100, the electric pump 100 is empty, and the electric pump 100 cannot output enough working medium to lubricate and / or cool the vehicle. Specifically, the electric pump 100 cannot output enough working medium, such as oil, to lubricate the gear box and / or cool the drive motor. The gear box is not sufficiently lubricated, which affects the user experience on the one hand and the life of the gears in the gear box on the other hand. The drive motor is not sufficiently cooled, and the heat generated by the drive motor cannot be dissipated in time, which affects the life of the drive motor. In order to reduce the occurrence of the above situation, the control panel assembly 15 is provided with a detection unit. According to the principle that the pressure at each point with the same depth from the liquid surface is equal, the detection unit 152 can detect the pressure at each point in the liquid storage chamber 201 with the same depth from the detection unit 152, and then the liquid level of the working medium in the liquid storage chamber 201 can be obtained. Usually, a detection unit 152 for detecting the height of the working medium liquid level is set in the liquid reservoir. The detection accuracy of the detection unit 152 will be affected by temperature. The electric pump provided in the present application is conducive to reducing the influence of temperature on the detection unit, and thus is conducive to improving the detection accuracy of the detection unit. The temperature of the working medium in the second chamber 18 is usually also required to be detected, and the temperature value of the working medium in the second chamber 18 is detected to determine whether the temperature of the working medium in the current liquid reservoir 200 is normal. Therefore, how to reduce the influence of the heating components in the electric pump 100 on the detection unit 152 is also a problem that technicians in this field need to consider. The detection unit 152 includes but is not limited to detecting the pressure value and / or temperature value of the inner cavity of the electric pump. For example, it can also detect other operating parameters of the electric pump 100. The following is an introduction to an embodiment in which the detection unit 152 is used to detect the pressure value and / or temperature value of the inner cavity of the electric pump.

[0053] refer to Figures 2 to 4As shown, the electric pump 100 includes a housing, a pump rotor assembly 12, a stator assembly 13, a motor rotor assembly 14, a shaft 16 and a control board assembly 15; the housing 11 is provided with an inner cavity, and the pump rotor assembly 12, the stator assembly 13, the shaft 16 and the motor rotor assembly 14 are placed in the inner cavity. The pump rotor assembly 12 is arranged near one end of the shaft 16, and the motor rotor assembly 14 is arranged near the other end of the shaft 16. The stator assembly 13 is sleeved on the outer periphery of the motor rotor assembly 14. The stator assembly 13 includes a stator core 131, an insulating frame 132 and a winding 133. The insulating frame 132 at least covers at least a part of the surface of the stator core 131, and the winding 133 is wound around the insulating frame 132. The control board assembly 15 includes a substrate 151 and electronic components, and the electronic components are fixedly connected to the substrate 151. The control board assembly 15 is electrically connected to the stator assembly 13. The control board assembly 15 controls the current in the winding 133 of the stator assembly 13 to change according to a predetermined rule, thereby controlling the stator assembly 13 to generate a changing excitation magnetic field. The motor rotor assembly 14 rotates under the action of the excitation magnetic field. The motor rotor assembly 14 can directly or indirectly drive some parts in the pump rotor assembly 12 to rotate. When the pump rotor assembly 12 rotates, the volume of the hydraulic cavity between the pump rotor assemblies 12 changes, so that the working medium is pressed out to the outlet to generate flow power.

[0054] As a way to achieve this, refer to Figures 1 to 3As shown, an electric pump 100 includes a pump rotor assembly 12, a motor rotor assembly 14, a control board assembly 15 and a shaft 16. The pump rotor assembly 12 is connected to the motor rotor assembly 14 in a transmission manner. Specifically, the pump rotor assembly 12 is connected to the motor rotor assembly 14 in a transmission manner through the shaft 16. More specifically, the shaft 16 is connected to the pump rotor assembly 12 in a transmission manner, and the shaft 16 is connected to the motor rotor assembly 14 in a fixed connection with the shaft 16. The electric pump 100 has a first cavity 17 and a second cavity 18. The pump rotor assembly 12 is located in the first cavity 17. The control board assembly 15 is located in the second cavity 18. The second cavity 18 is directly or indirectly connected to an external liquid storage cavity 201. The working medium in the liquid storage cavity 201 can enter the second cavity 18. The control board assembly 15 includes a detection unit 152. Specifically, the control board assembly 15 includes a substrate 151 and a detection unit 152. The detection unit 152 is fixedly connected to the substrate 151. At least part of the detection unit 152 is in contact with the working medium in the second cavity. The detection unit 152 can detect the pressure value and / or temperature value of the working medium in the second chamber 18. In this way, if the liquid level of the working medium in the liquid storage chamber is detected, since the second chamber 18 is directly or indirectly connected to the liquid storage chamber 201, according to the principle that the pressure at each point at the same depth from the liquid surface is equal, the detection unit 152 can detect the pressure at each point in the liquid storage chamber 201 at the same depth from the detection unit 152, and then the liquid level of the working medium in the liquid storage chamber 201 can be obtained. Since the detection unit 152 is integrated into the electric pump 100, it is beneficial to reduce the space occupied by the detection unit 152 in the oil reservoir, and then it is beneficial to simplify the structure of the automobile lubrication or cooling system. It should be noted that here and in the following "the detection unit 152 detects the pressure of the working medium in the second chamber 18" refers to the pressure at the contact position with the detection unit 152. The pressure mentioned here is static pressure, which is called pressure in physics and is customarily called pressure in practical engineering applications. If the temperature of the working medium in the liquid storage chamber is detected, the second chamber 18 is directly or indirectly connected to an external liquid storage chamber 201, and the temperature value of the working medium in the liquid storage chamber can be obtained by detecting the temperature in the second chamber.

[0055] Please refer to Figures 2 to 5As shown, the stator assembly 13 includes a stator core 131, an insulating frame 132 and a winding 133, the number of windings 133 is at least three, the insulating frame 132 is coated on at least part of the surface of the stator core 131, and the insulating frame 132 is used to isolate the winding 133 and the stator core 131, so that the winding 133 and the stator core 131 are electrically insulated. The insulating frame 132 and the stator core 131 can be an integrated structural member. Specifically, as an implementation method, the insulating frame 132 is formed by injection molding with the stator core 131 as an insert. Of course, as other implementation methods, the insulating frame 132 and the stator core 131 are separately set, and the "separate setting" here means that the insulating frame 132 and the stator core 131 are respectively processed into two separate parts and then assembled. The connection is limited or fixed by assembly. In this embodiment, the insulating frame 132 is formed by injection molding with the stator core 131 as an insert. It can be understood that the stator core 131 and the insulating frame 132 are an integrated structure. The winding 133 is wound on the insulating frame 132. As a specific embodiment, the winding 133 includes nine windings 133. Of course, as other implementations, the winding 133 can also include other numbers of windings 133, such as three, six, twelve, or other numbers.

[0056] In order to reduce the impact of heat-generating components in the electric pump, such as the stator assembly and / or the control board assembly, on the detection unit, during the operation of the electric pump, the stator assembly and / or the control board assembly will generate a certain amount of heat and exchange it with the working medium in the second cavity. The working medium in the second cavity will absorb a certain amount of heat. The detection unit is set at different positions in the second cavity and will be affected differently by the above heat.

[0057] As an implementation, see Figures 1 to 4As shown, the electric pump 100 provided in the present application includes a pump rotor assembly 12, a motor rotor assembly 14, a control board assembly 15 and a shaft 16, the shaft 16 is transmission-connected to the pump rotor assembly 12, the shaft 16 is transmission-connected to the motor rotor assembly 14, the electric pump 100 has a first cavity 17 and a second cavity 18, the pump rotor assembly 12 is located in the first cavity 17, the control board assembly 15 is located in the second cavity 18, the electric pump 100 has a first channel 161, the working medium can enter the second cavity 18 through the first channel 161, the first channel 161 has an outlet 1611 on the shaft, the control board assembly 15 includes a detection unit 152, the detection unit 152 is arranged corresponding to the outlet 1611 of the first channel 161, and the detection unit 152 can detect the pressure value and / or temperature value of the working medium located in the second cavity 18. In this way, the working medium can directly enter the second cavity, and the detection unit is set corresponding to the outlet of the first channel. The detection unit can contact the working medium flowing out of the outlet of the first channel at the first time, reducing the influence of heat generated by other components, such as the stator assembly and / or the control board assembly, on the detection unit, thereby helping to improve the detection accuracy of the detection unit. It should be noted that the "corresponding setting" in the corresponding setting of the detection unit 152 and the outlet 1611 of the first channel 161 here refers to the corresponding setting method in which the working medium flowing out of the outlet 1611 of the first channel 161 can contact the detection unit at the first time. For details, please refer to Figures 1 to 21 As shown, the control board assembly 15 includes a substrate 151, and the detection unit 152 is welded and fixed to the substrate 151. When the electric pump is working, at least part of the detection unit 152 is located on the trajectory of the working medium flowing out of the outlet 1611 of the first channel 161. More specifically, along the axial direction of the shaft 16, the first channel 161 runs through the shaft 16, the outlet 1611 of the first channel 161 is located at the end 163 of the shaft 16, and at least part of the detection unit 152 is located between the end 163 and the substrate 151; or, the shaft 16 also has a lateral channel 162, one end of the lateral channel 162 is connected to the second cavity 18, and the other end of the lateral channel 162 is connected to the first channel 161, and the outlet 1611 of the first channel 161 is located at the outer side 164 of the shaft 16. Along the axial direction of the shaft 16, the first channel 161' does not penetrate the shaft 16', and the shaft 16' has a lateral channel 162', one end of the lateral channel 162' is connected to the second cavity 18, and the other end of the lateral channel 162' is connected to the first channel 161'. As an implementation method, please refer to Figures 2 to 3 , Fig.15 , Fig.16As shown, the control board assembly 15 includes a substrate 151, and the detection unit 152 includes a varistor 1521 and / or a thermistor 1522. The varistor 1521 and / or the thermistor are welded and fixed to the substrate 151, and at least part of the varistor 1521 is in contact with the working medium in the second cavity 18. Alternatively, at least part of the thermistor 1522 is in contact with the working medium in the second cavity 18; or at least part of the thermistor 1522 and at least part of the varistor 1521 are in contact with the working medium in the second cavity 18. Specifically, the varistor 1521 and / or includes a surface-mount structure and a pin-mount structure. In this embodiment, the varistor 1521 and / or is a surface-mount structure. In this way, first, while detecting the working medium pressure and / or temperature of the second chamber 18, it is helpful to reduce the space occupied by the varistor 1521 and / or thermistor 1522 in the electric pump 100; second, the surface-mounted varistor 1521 and / or thermistor 1522 is helpful to improve the stability of the varistor 1521 and / or thermistor 1522 after welding with the substrate 151. It should be noted that in this embodiment, only the varistor position setting of the detection unit 152 that can detect the working medium pressure value in the second chamber 18 or the thermistor setting of the working medium temperature value in the second chamber 18 is shown, and the above figure does not show the varistor position setting of the detection unit 152 that can detect the working medium pressure value in the second chamber 18 and the thermistor setting of the working medium temperature value in the second chamber 18.

[0058] As a specific implementation method, please refer to Figures 2 to 3 As shown, the stator assembly 13, the motor rotor assembly 14 and the control board assembly 15 are located in the second cavity 18, and the stator assembly 13 and the control board assembly 15 are limitedly arranged. Figure 4 and Figure 5 As shown, the electric pump 100 includes a limiting portion 21 and a matching portion 22, one of which is located on the insulating frame 132 of the stator assembly 13, and the other of which is located on the base plate 151 of the control board assembly 15. The limiting portion 21 and the matching portion 22 are limited and matched. In order to strengthen the connection strength between the control board assembly 15 and the stator assembly 13, the limiting portion 21 and the matching portion 22 are fixedly connected after the limiting and matching. The fixed connection method includes welding fixation.

[0059] As an implementation, see Figures 1 to 16As shown, the control board assembly 15 includes a substrate 151, and the detection unit 152 is welded and fixed to the substrate 151. At least a part of the detection unit 152 is located on the outflow trajectory of the working medium from the outlet 1611 of the first channel 161. In this way, the detection unit 152 can be in contact with the working medium flowing out of the outlet 1611 of the first channel 161 for the first time. First, it is helpful to reduce the influence of heat generated by other components, such as the stator assembly and / or the control board assembly, on the detection unit, thereby helping to improve the detection accuracy of the detection unit. Second, it is helpful to increase the adaptability of the electric pump. For example, a magnet can be set at the end position of the shaft, and a Hall sensor can be set on the control board assembly. Figures 1 to 16 In this way, the temperature and / or pressure of the working medium in the electric pump can be detected while detecting the phase of the electric pump.

[0060] For further information, please refer to Figures 1 to 16 The substrate 151 includes a front surface 1511 and a back surface 1512. Along the axial direction of the electric pump 100, the front surface 1511 is closer to the motor rotor assembly 14 than the back surface 1512. The detection unit 152 can be arranged on the front surface 1511 of the substrate or on the back surface 1512 of the substrate 151. As an implementation method, please refer to Figures 1 to 16 As shown, along the axial direction of the shaft 16, the first channel 161 penetrates the shaft 16. For details, please refer to Fig.13 As shown, the substrate 151 includes a front side 1511 and a back side 1512. Along the axial direction of the electric pump 100, the front side 1511 is closer to the motor rotor assembly 14 than the back side 1512; the detection unit 152 is located at the front side 1511; the outlet 1611 of the first channel 161 is located at the end 163 of the shaft 16, and at least part of the detection unit 152 is located between the end 163 and the substrate 151. Alternatively, please refer to Figure 3 As shown, the shaft 16 also has a lateral channel 162, one end of which is connected to the second chamber 18, and the other end of which is connected to the first channel 161, and the outlet 1611 of the first channel 161 is located at the outer side 164 of the shaft 16. Figure 3 In the embodiment, the end 163 of the shaft 16 can be provided with other components, such as a magnet, and components provided on the control board assembly, such as a Hall sensor, for detecting the phase angle of the electric pump. Figure 3In the figure, the magnet and the Hall sensor corresponding to the magnet are not shown. In this way, the influence of the heat generated by the stator assembly 13 and / or the control board assembly 15 on the detection unit 152 during the operation of the electric pump 100 is reduced, which is conducive to improving the detection accuracy of the detection unit 152, and further conducive to detecting the accurate value of the liquid level of the working medium in the liquid storage chamber 201 and / or the temperature of the working medium in the liquid storage chamber 201. It should be noted that the axial direction of the electric pump is the direction in which the axial centerline of the electric pump extends.

[0061] Please refer to Figure 3 and Fig.14 As shown, as an implementation method, along the axial direction of the shaft 16', the first channel 161' does not penetrate the shaft 16', and the shaft 16' has a lateral channel 162', one end of the lateral channel 162' is connected to the second chamber 18, and the other end of the lateral channel 162' is connected to the first channel 161'. In this way, a magnet for detecting the phase of the electric pump 100 can be set at the end 163 that does not penetrate the shaft 16'. Figure 3 as well as Fig.14 Not shown in the figure, it is helpful to simplify the structure of the magnet installation position and lay the foundation for simplifying the structure of the electric pump. Fig.14 The relationship between the trajectory L3 of the working medium flowing out of the lateral channel 162 ′ and the detection unit 152 is exemplarily given in FIG.

[0062] Further, as an implementation method, please refer to Figures 3 to 16 , Fig. 20 As shown, the substrate 151 includes a front side 1511 and a back side 1512. Along the axial direction of the electric pump 100, the front side 1511 is closer to the motor rotor assembly 14 than the back side 1512; the detection unit 152 is located on the front side 1511. Along the axial direction of the electric pump 100, the outlet 1611 of the first channel 161 is closer to the front side 1511 than the back side 1512. For details, please refer to Fig. 20 As shown, along the direction from the center line X1 of the shaft 16' to the center line X2 of the lateral channel 162', the angle Y between the center line X1 of the shaft 16' and the center line X2 of the lateral channel 162' is an acute angle or a right angle; please refer to Fig.19 and Fig.21 As shown, or, the detection unit 152 is located on the reverse side 1512, along the axial direction of the electric pump 100, the outlet 1611 of the first channel 16 is closer to the reverse side 1512 relative to the front side 1511, and along the direction from the center line X1 of the shaft 18 to the center line X2 of the lateral channel 162', the angle Y between the center line X1 of the shaft 18 and the center line X2 of the lateral channel 162' is an obtuse angle. Fig.14 The first channel 161 does not penetrate the shaft 16, and the angle Y between the center line X1 of the shaft 16 and the center line X2 of the lateral channel 162' is a right angle. Figure 3In the figure, the first channel 161 passes through the shaft 16, and the angle Y between the center line X1 of the shaft 16 and the center line X2 of the lateral channel 162' is a right angle. Other situations are not shown, for example, the first channel 161 does not pass through the shaft 16, and the angle Y between the center line X1 of the shaft 16 and the center line X2 of the lateral channel 162' is an acute angle.

[0063] In this way, firstly, it is helpful to increase the adaptability of the electric pump and match the needs of different customers. Secondly, it is helpful to reduce the influence of external heating components on the detection unit, thereby improving the detection accuracy of the detection unit. Fig.14 and Fig.21 The relationship between the trajectory L3 of the working medium flowing out of the lateral channel 162 ′ and the detection unit 152 is exemplarily given in FIG.

[0064] As an implementation, see Figures 1 to 5 As shown, the electric pump 100 includes a stator assembly 13, the stator assembly 13 is located in the second cavity 18, the stator assembly 13 is limitedly connected to the control board assembly 15, and the stator assembly 13 and the control board assembly 15 are electrically connected through the pin 20. The stator assembly 13 and the control board assembly 15 are located in the second cavity 18. Through such a setting, the stator assembly 13 and the control board assembly 15 are directly connected, and other components are not required to support the control board assembly 15. On the one hand, it is beneficial to reduce the cost of the electric pump 100, and on the other hand, it is beneficial to the miniaturization of the electric pump 100 in the direction of the axis 16. As an implementation method, along the axis 16 of the electric pump 100, the pump rotor assembly 12 is located on one side of the stator assembly 13, and the control board assembly 15 is located on the other side of the stator assembly 13. In this way, the situation that the control board assembly 15 is perforated due to avoiding the pump shaft 16 is reduced, and the layout space of other electronic components and the detection unit 152 is increased on the substrate 151 of the control board assembly 15.

[0065] Please refer to Figures 1 to 12 As shown, the present application also discloses an integrated component 300, including the above electric pump 100 and a liquid reservoir 200, the liquid reservoir 200 has a liquid storage chamber 201, the liquid storage chamber 201 is used to store the working medium, the electric pump 100 includes an inlet channel 1111, the first port 1111a of the inlet channel 1111 is connected to the liquid storage chamber 201, and the second port 1111b of the inlet channel 1111 is connected to the first chamber 17. In this way, the detection unit is integrated into the electric pump, which is conducive to simplifying the structure of the integrated component.

[0066] As an implementation, see Figures 1 to 14As shown, the electric pump 100 includes an inlet channel 1111, the inlet channel 1111 is used for the inflow of the working medium of the electric pump 100, one end of the inlet channel 1111 is connected to the liquid storage chamber 201, and the second end of the inlet channel 1111 is connected to the first chamber 17, defining a reference liquid level surface 202. When the reference liquid level is parallel to the horizontal plane, the reference liquid level surface 202 is the liquid level surface that just covers the inlet channel 1111, and at least part of the detection unit 152 is located above the reference liquid level surface 202. In this way, the detection unit 152 can directly detect that the working medium in the liquid storage chamber 201 is lower than the critical pressure value of the suction port. When the working medium in the liquid storage chamber 201 is lower than the first port 1111a of the inlet channel 1111, as an implementation method, the electric pump can send the above-mentioned critical pressure signal to the host computer at the first time, and the host computer controls the electric pump 100 to stop running according to the critical pressure signal, or the host computer sends an alarm signal to remind the reservoir to replenish the working medium in time. Such a setting is beneficial to reducing the processing time of the control unit processor. The control unit can identify the critical pressure signal in a short time, thereby reducing the impact of the working medium being lower than the reference liquid level 202 on the entire lubrication or cooling system.

[0067] As an implementation, see Figures 1 to 19 As shown, the electric pump 100 includes a housing, which includes a pump housing 11, a motor housing 112, and a bottom cover 113; the pump housing 11 has an inlet channel 1111 and an outlet channel 1112, the inlet channel 1111 is used for the inflow of the working medium in the reservoir, and the outlet channel 1112 is used for the outflow of the working medium. The pump housing 11 is fixedly connected to the motor housing 112, and the fixed connection method includes but is not limited to connection by screws or bolts, bonding, welding, or interference fit connection. In this embodiment, the pump housing 11 and the motor housing 112 are connected by interference fit. In this way, compared with the connection by screws or bolts, it is beneficial to reduce the number of parts, thereby helping to reduce the production cost of the electric pump 100. Of course, the pump housing 11 and the motor housing 112 can also be connected by other methods, such as plug-in, card connection, etc. The motor housing 112 and the bottom cover 113 are connected by screws or bolts. In this embodiment, the electric pump 100 includes a first cavity 17 and a second cavity 18, and the first cavity 17 and the second cavity 18 can be connected or not connected. When the first cavity 17 and the second cavity 18 are connected, when the electric pump 100 is working, the working medium in the first cavity 17 can enter the second cavity 18, and then contact the detection unit 152 located in the second cavity 18. Of course, the first cavity 17 and the second cavity 18 can also be arranged without being connected, and the working medium in the liquid storage cavity 201 can directly enter the second cavity 18 through other channels.

[0068] Please refer to Figures 1 to 21As shown, in order to speed up the circulation of the working medium in the second chamber 18, reduce the influence of the heat generated by the stator assembly 13 during the operation of the electric pump 100 on the detection unit 152, and affect the measurement accuracy of the detection unit 152. As an implementation method, the electric pump 100 includes a second channel 171, and the wall corresponding to the first chamber 17 includes a bottom. Along the thickness direction of the bottom, the second channel 171 runs through the bottom. The pump rotor assembly 12 includes a first rotor 121 and a second rotor 122. The first rotor 121 includes a plurality of external teeth, and the second rotor 122 includes a plurality of internal teeth. The second rotor 122 is located at the outer periphery of the second rotor 122. The electronic rotor assembly is fixedly connected to the first rotor 121 assembly. Driven by the motor rotor assembly 14, at least part of the external teeth of the first rotor 121 are meshed with at least part of the internal teeth of the second rotor 122 so that the first rotor 121 and the second rotor 122 can transmit; the volume cavity 23 is formed between the external teeth of the first rotor 121 and the internal teeth of the second rotor 122, and the volume cavity 23 is divided into a first area 231 and a second area 232. In the first area 231, along the rotation direction of the pump rotor assembly 12, the volume of the volume cavity 23 formed between an external tooth of the first rotor 121 and the internal teeth of the second rotor 122 corresponding to the external tooth gradually increases, and in the second area 232, along the rotation direction of the pump rotor assembly 12, a volume cavity 23 is formed between an external tooth of the first rotor 121 and the internal teeth of the second rotor 122 corresponding to the external tooth. The volume of the volume cavity 23 gradually decreases, and a first dividing line L1 is defined. At the first dividing line L1, along the rotation direction of the first rotating assembly, the starting point where the volume cavity 23 formed between an external tooth of the first rotor 121 and the internal tooth of the second rotor 122 corresponding to the external tooth gradually decreases from the maximum is the first contact point A, and the first dividing line L1 is the line connecting the first contact point A and the center line of the first rotor 121; a second dividing line L2 is defined. At the second dividing line L2, the starting point where the volume cavity 23113 formed by another external tooth of the first rotor 121 and the external tooth gradually increases from the minimum is the second contact point B, The second dividing line is the line connecting the second contact point B and the center of the first rotor 121; the first dividing line L1 and the second dividing line L2 are dividing lines between the first area 231 and the second area 232, wherein the first dividing line L1 is the dividing line between the end of the first area 231 and the beginning of the second area 232, wherein the second dividing line L2 is the dividing line between the beginning of the first area 231 and the end of the second area 232, and the pressure in the second area 232 gradually increases from the first dividing line L1 to the second dividing line L2, and the pump rotor assembly 12 is projected toward the bottom, and at least part of the second channel 171 is located in the first area 231. In this way, the working medium in the second cavity 18 can leave the second cavity 18 through the second channel 171, accelerate the heat dissipation of the stator assembly 13, and reduce the influence of the heat generated by the stator assembly 13 and / or the control board assembly on the accuracy of the detection unit 152.

[0069] The present application discloses a control method, referring to Figures 1 to 21 As shown, the control method can detect the pressure of the working medium inside the electric pump, and the control method includes the following steps:

[0070] Obtaining a current pressure value of the working medium in the second chamber;

[0071] Determine whether the current pressure value is less than a preset pressure threshold; if yes, determine that the current liquid level state in the liquid reservoir is abnormal or the electric pump is in a dry running state; if no, determine that the current liquid level state in the liquid reservoir is normal or the electric pump is operating normally;

[0072] And / or determine whether the current temperature value is less than a preset temperature threshold; if yes, determine that the current temperature of the working medium in the electric pump is normal; if no, determine that the current temperature of the working medium in the electric pump is abnormal. In this way, first, it is helpful to increase the service life of the electric pump, and second, it is helpful to simplify the structure of the lubrication system or the cooling system.

[0073] Furthermore, a current voltage value corresponding to a current pressure value of the working medium in the second chamber is obtained, and the voltage value is compared with a voltage threshold value corresponding to a preset pressure threshold value.

[0074] The present application discloses a control system, referring to Figures 1 to 21 As shown, for detecting the pressure of the working medium in the second chamber, the control system includes:

[0075] A detection unit, used to detect the current pressure value of the working medium in the second chamber;

[0076] a judging unit, for judging whether the current pressure value is less than a preset pressure threshold; if so, judging that the current liquid level state in the liquid reservoir is abnormal or the electric pump is in a dry running state; if not, judging that the current liquid level state in the liquid reservoir is normal or the electric pump is operating normally;

[0077] And / or determine whether the current temperature value is less than a preset temperature threshold; if yes, determine that the current temperature of the working medium in the electric pump is normal; if no, determine that the current temperature of the working medium in the electric pump is abnormal. In this way, first, it is helpful to increase the service life of the electric pump, and second, it is helpful to simplify the structure of the lubrication system or the cooling system.

[0078] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although the present application has been described in detail in this specification with reference to the above embodiments, a person of ordinary skill in the art should understand that a person of ordinary skill in the art can still modify or make equivalent substitutions to the present application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. An electric pump (100), characterized in that: The electric pump (100) comprises a pump rotor assembly (12), a motor rotor assembly (14), a control board assembly (15) and a shaft (16); the shaft (16) is transmission-connected to the pump rotor assembly (12); the shaft (16) is transmission-connected to the motor rotor assembly (14); the electric pump (100) comprises a first chamber (17) and a second chamber (18); the pump rotor assembly (12) is located in the first chamber (17); the control board assembly (15) is located in the second chamber (18); the electric pump (100) comprises a first channel (161); the first channel has an outlet (1611) on the shaft (16); the control board assembly (15) comprises a detection unit (152); the detection unit (152) is arranged corresponding to the outlet (1611) of the first channel (161); the detection unit (152) is capable of detecting a pressure value and / or a temperature value of a working medium located in the second chamber (18).

2. The electric pump (100) according to claim 1, characterized in that: The control board assembly (15) comprises a substrate (151), the detection unit (152) comprises a varistor (1521) and / or a thermistor (1522), and the varistor (1521) and / or the thermistor (1522) are fixed to the substrate (151) by welding; At least part of the varistor (1521) is in contact with the working medium in the second chamber (18); Alternatively, when the electric pump is operating, at least part of the thermistor (1522) and the working medium in the second chamber (18); Alternatively, when the electric pump is operating, at least part of the thermistor (1522) and at least part of the varistor (1521) are in contact with the working medium in the second chamber (18).

3. The electric pump according to claim 1 or 2, characterized in that: The control board assembly (15) comprises a base plate (151), the detection unit (152) being welded and fixed to the base plate (151), and when the electric pump is working, at least a portion of the detection unit (152) is located on a trajectory where a working medium flows out of an outlet (1611) of the first channel (161).

4. The electric pump (100) according to claim 3, characterized in that: Along the axial direction of the shaft (16), the first channel (161) penetrates the shaft (16); the substrate (151) comprises a front surface (1511) and a rear surface (1512); along the axial direction of the electric pump (100), the front surface (1511) is closer to the motor rotor assembly (14) than the rear surface (1512); and the detection unit is located on the front surface (1511); The outlet (1611) of the first channel (161) is located at the end (163) of the shaft (16), and at least part of the detection unit (152) is located between the end (163) and the substrate (151); Alternatively, the shaft (16) further comprises a lateral channel (162), one end of the lateral channel (162) being in communication with the second cavity (18), and the other end of the lateral channel (162) being in communication with the first channel (161), and an outlet (1611) of the first channel (161) being located at an outer side (164) of the shaft (16).

5. The electric pump (100) according to claim 3, characterized in that: Along the axial direction of the shaft (16), the first channel (161') does not penetrate the shaft (16'), and the shaft 16' has a lateral channel (162'), one end of the lateral channel (162') is connected to the second cavity (18), and the other end of the lateral channel (162') is connected to the first channel (161').

6. The electric pump (100) according to claim 5, characterized in that: The substrate (151) comprises a front surface (1511) and a back surface (1512), and along the axial direction of the electric pump (100), the front surface (1511) is closer to the motor rotor assembly (14) than the back surface (1512); The detection unit (152) is located on the front side (1511), along the axial direction of the electric pump (100), the outlet (1611) of the first channel (161) is closer to the front side (1511) relative to the reverse side (1512), and along the direction from the center line of the shaft (16) to the center line of the lateral channel (162'), the angle (Y) between the center line (x1) of the shaft (16) and the center line (x2) of the lateral channel (162') is an acute angle; Alternatively, the detection unit (152) is located on the reverse side (1512), and along the axial direction of the electric pump (100), the outlet (1611) of the first channel (161) is closer to the reverse side (1512) relative to the front side (1511), and along the direction from the center line (X1) of the shaft (16) to the center line (X2) of the lateral channel (162'), the angle (Y) between the center line (X1) of the shaft (16) and the center line (X2) of the lateral channel (162') is an obtuse angle.

7. The electric pump according to any one of claims 1 to 6, characterized in that: The electric pump (100) comprises a second channel (171), the wall portion forming the first chamber (17) comprises a bottom portion (1711), and the second channel (171) penetrates the bottom portion (1711) along the thickness direction of the bottom portion (1711); the pump rotor assembly (12) comprises a first rotor (121) and a second rotor (122), the first rotor (121) comprises a plurality of external teeth, the second rotor (122) comprises a plurality of internal teeth, the second rotor (122) is located at the outer periphery of the first rotor (121), the motor rotor assembly (14) is fixedly connected to the first rotor (121), and driven by the motor rotor assembly (14), at least a portion of the external teeth of the first rotor (121) meshes with at least a portion of the internal teeth of the second rotor (122), so that transmission can be achieved between the first rotor (121) and the second rotor (122); A volume cavity (23) is formed between an outer tooth of a rotor (121) and an inner tooth of a second rotor (122), wherein the volume cavity (23) is divided into a first region (231) and a second region (232). In the first region (231), along the rotation direction of the pump rotor assembly (12), the volume of the volume cavity (23) formed between an outer tooth of the first rotor (121) and an inner tooth of the second rotor (122) corresponding to the outer tooth gradually increases. In the second region (232), along the rotation direction of the pump rotor assembly (12), the volume of the volume cavity (23) formed between an outer tooth of the first rotor (121) and an inner tooth of the second rotor (122) corresponding to the outer tooth gradually decreases. When the pump rotor assembly (12) is projected onto the bottom (1711), at least a portion of the second channel (171) is located in the first region (231).

8. An integrated assembly (300), characterized in that: The electric pump (100) comprises an electric pump (100) and a liquid reservoir (200) as claimed in any one of claims 1 to 7, wherein the liquid reservoir (200) has a liquid storage chamber (201), wherein the liquid storage chamber (201) is used to store a working medium, and the electric pump (100) comprises an inlet channel (1111), wherein a first port (1111a) of the inlet channel (1111) is connected to the liquid storage chamber (201), and a second port (1111b) of the inlet channel (1111) is connected to the first chamber (17).

9. The integrated assembly (300) according to claim 8, characterized in that: A reference liquid level surface (202) is defined. When the reference liquid level surface (202) is parallel to a horizontal plane, the reference liquid level surface (202) is a liquid level surface that just covers the first port (1111a) of the inlet channel (1111), and at least a portion of the detection unit (152) is located above the reference liquid level surface (202).

10. A control method, which can be used to detect the pressure value and / or temperature value of the working medium in the second chamber of the electric pump according to any one of claims 1 to 7, and the control method comprises the following steps: Acquiring a current pressure value and / or temperature value of the working medium in the second chamber; Determine whether the current pressure value is less than a preset pressure threshold; if yes, determine that the current liquid level state in the liquid reservoir is abnormal or the electric pump is in a dry running state; if no, determine that the current liquid level state in the liquid reservoir is normal or the electric pump is operating normally; And / or determine whether the current temperature value is less than a preset temperature threshold; if yes, determine that the temperature of the working medium in the current electric pump is normal; if no, determine that the temperature of the working medium in the current electric pump is abnormal.

11. The control method according to claim 10, characterized in that: A current voltage value corresponding to a current pressure value of the working medium in the second chamber is obtained, and the voltage value is compared with a voltage threshold value corresponding to a preset pressure threshold value.

12. A control system, comprising: A detection unit, used to detect a current pressure value and / or temperature value of the working medium in the second chamber; A judging unit, for judging whether the current pressure value is less than a preset pressure threshold; If yes, it is determined that the current liquid level state in the liquid reservoir is abnormal or the electric pump is in dry running state; if no, it is determined that the current liquid level state in the liquid reservoir is normal or the electric pump is operating normally; And / or determine whether the current temperature value is less than a preset temperature threshold; if yes, determine that the temperature of the working medium in the current electric pump is normal; if no, determine that the temperature of the working medium in the current electric pump is abnormal.

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