A split type high temperature resistant electronic water pump

Abstract

The present invention provides a split-type high-temperature resistant electronic water pump, comprising a pump head, a pump body, and an independent control module. The pump head comprises a pump head cavity and an impeller, the pump head cavity has a liquid inlet and a liquid outlet, and the impeller is installed in the pump head cavity. The pump body is connected to the pump head; the pump body comprises a pump body shell, a motor stator, and a motor rotor, the motor stator and the motor rotor are installed in the pump body shell, and the motor rotor is connected to the impeller. The control module is separated from the pump body, and is electrically connected to the pump body by means of a conductive component. The electronic water pump provided by the present invention is a split type, and its control module is separated from the pump body and is far away from the pump head. When the electronic water pump is working, the heat of the liquid in the pump head is difficult to reach the control module. This split-type high-temperature resistant electronic water pump can be used in a high-temperature environment, is stable and reliable, and has a long service life.

Description

Technical Field

[0001] The invention relates to an electronic water pump, in particular to a split type high temperature resistant electronic water pump, belonging to the technical field of water pumps. Background Art

[0002] With the development of new energy, electronic water pumps are gradually replacing traditional mechanical water pumps. Common electronic water pump application scenarios are generally in automobile cooling systems, domestic hot water systems, etc. In the above scenarios, the medium used for circulation is basically water or common ethylene glycol antifreeze, and the maximum medium temperature will not exceed 100°C. Therefore, the common electronic water pumps on the market generally have a temperature resistance of 100°C and a maximum temperature of no more than 125°C.

[0003] In other scenarios, such as high-temperature fuel cells HT-PEMFC, the operating temperature will reach 160-180°C. At this time, the use of conventional electronic water pumps will result in insufficient overall heat resistance of the water pump, excessive local temperature, and damage to the water pump control board due to high temperature transmission, which will significantly reduce the life and stability of the product. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the control components of the existing electronic water pump are not resistant to high temperatures.

[0005] In order to solve the above technical problems, the present invention provides a split high temperature resistant electronic water pump, comprising:

[0006] A pump head, the pump head comprises a pump head cavity and an impeller, the pump head cavity has a liquid inlet and a liquid outlet, and the impeller is installed in the pump head cavity;

[0007] The pump body is connected to the pump head; the pump body includes a pump body shell, a motor stator, and a motor rotor, the motor stator and the motor rotor are installed in the pump body shell, and the motor rotor is connected to the impeller;

[0008] The control module is separated from the pump body and is electrically connected to the pump body by means of conductive components.

[0009] In some embodiments, the control module includes a control box and a control board, and the control board is installed in the control box.

[0010] In some embodiments, the conductive component includes three conductive posts, the first end of each conductive post is connected to the edge of the rear end surface of the pump body shell, and the second end of the conductive post is connected to the bottom edge of the control box; each conductive post is insulated on the outside and conducts one phase of the three-phase electricity inside.

[0011] In some embodiments, at least three connecting columns are included, a first end of each connecting column is connected to the edge of the rear end surface of the pump body shell, and a second end of each connecting column is connected to the edge of the bottom surface of the control box.

[0012] In some embodiments, a heat insulating component is installed in the space between the rear end surface of the pump body shell and the bottom surface of the control box.

[0013] In some embodiments, a cooling fan is installed in the space between the rear end surface of the pump body shell and the bottom surface of the control box.

[0014] In some embodiments, the cooling fan is configured such that when the fan blades rotate, wind blows from the bottom surface of the control box to the rear end surface of the pump body shell.

[0015] In some embodiments, the control box is formed by snapping together a control box bottom and a control box cover, and the control box is provided with an air guide hole penetrating the control box bottom and the control box cover.

[0016] In some embodiments, the blades of the cooling fan are connected to the motor rotor.

[0017] In some embodiments, the conductive member comprises a flexible wire.

[0018] Beneficial effects of the present invention:

[0019] (1) The electronic water pump is a split type, and its control module is separated from the pump body and far away from the pump head. When the electronic water pump is working, the heat of the liquid in the pump head is difficult to reach the control module.

[0020] (2) Heat insulation components or cooling fans are used between the control module and the pump body to keep the control module at a low temperature. The cooling fan is driven by the water pump motor, which reduces the complexity of control.

[0021] (3) The split-type high-temperature resistant electronic water pump provided by the present invention can be used in high-temperature environments, is stable and reliable, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the overall structure of the electronic water pump in Example 1 of the present invention.

[0023] Figure 2 This is a schematic diagram of the installation of the electronic water pump insulation structure in Example 1 of the present invention.

[0024] Figure 3 This is a schematic diagram of the bottom of the electronic water pump control box in Example 1 of the present invention.

[0025] Figure 4 This is a schematic diagram of the connection and installation between the fan and the pump body of the electronic water pump in Example 2 of the present invention.

[0026] Figure 5 This is a schematic diagram of the installation of the fan of the electronic water pump in Example 2 of the present invention.

[0027] Figure 6 Schematic diagram of the bottom of the control box of the electronic water pump in Example 2 of the present invention.

[0028] Figure 7 This is a schematic diagram of the electronic water pump control board in Example 2 of the present invention.

[0029] Figure 8 This is a schematic diagram of the electronic water pump control box cover in Example 2 of the present invention.

[0030] Fig. 9 This is a schematic diagram of the overall structure of the electronic water pump in Example 3 of the present invention.

[0031] The reference numerals in the above figures are as follows:

[0032] 100 Pump Head

[0033] 110 Pump head cavity

[0034] 111 Liquid inlet

[0035] 112 liquid outlet

[0036] 200 Pump body

[0037] 210 Pump body shell

[0038] 211 Radiator fins

[0039] 212 end face

[0040] 220 Conductive column

[0041] 230 Connecting column

[0042] 240 Motor shaft

[0043] 300 Control Module

[0044] 310 Control box bottom

[0045] 320 Control box cover

[0046] 321 Radiator fins

[0047] 400 Insulation components

[0048] 500 Control Module

[0049] 510 control box bottom

[0050] 511 Ventilation Holes

[0051] 512 Ventilation Holes

[0052] 520 Control box cover

[0053] 521 Ventilation pipe

[0054] 522 Ventilation pipe

[0055] 523 heat sink

[0056] 530 Control Panel

[0057] 531 Ventilation Hole

[0058] 600 Fan

[0059] 610 Fan Housing

[0060] 620 Protective cover

[0061] 700 Control Module

[0062] 710 Control box bottom

[0063] 711 Mounting holes

[0064] 720 Control Box Cover

[0065] 730 Wire DETAILED DESCRIPTION

[0066] The words "first", "second" and similar terms used in this specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but indicate the presence of at least one. In the description of this patent, unless otherwise specified, "multiple" means two or more. Words such as "including" or "having" and similar terms mean that the elements or objects appearing before "including" or "having" include the elements or objects listed after "including" or "having" and their equivalent elements, and do not exclude other elements or objects.

[0067] In the description of this patent, it should be understood that the terms "front", "rear", "up", "down", "left", "right", "horizontal", "lateral", "longitudinal", "top", "bottom", "inside", "outside", "clockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this patent and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0068] Different embodiments of the present invention may be replaced or combined, so the present invention may also be considered to include all possible combinations of the same and / or different embodiments described. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, the present invention should also be considered to include embodiments containing one or more of A, B, C, and D, all other possible combinations, even though the embodiment may not be clearly described in the following text.

[0069] In a traditional electronic water pump, the control board of the water pump is installed in the pump body shell, which is compact in size. However, the temperature resistance of the control board and electronic components is limited, which makes this electronic water pump unable to be used in a high temperature environment. The present invention provides a split high temperature resistant electronic water pump, in which the control module is separated from the pump body and electrically connected by a conductive component, so that the heat of the liquid in the pump is not easily transferred to the control board, the control board always keeps a low temperature, and the electronic water pump is not prone to failure.

[0070] The split high temperature resistant electronic water pump provided by the present invention is mainly composed of a pump head, a pump body, a control module, etc. The pump head and the pump body are tightly connected to form a whole, and the control module is separated from the pump body. The pump head cavity is provided with a liquid inlet and a liquid outlet, and the impeller is installed in the pump head cavity. The liquid inlet is perpendicular to the liquid outlet, wherein the liquid inlet coincides with the direction of the rotating shaft of the water pump impeller. The impeller is connected to the motor rotor. The pump body includes a pump body shell and a motor stator and a motor rotor installed in the pump body shell. The motor stator is a plurality of coils, which are installed close to the inner wall of the pump body shell. The motor rotor is located at the center axis of the pump body shell, and the front end of the motor rotor extends into the pump head cavity from the front end surface of the pump body shell, driving the impeller to rotate.

[0071] The conductive component extends from the rear end surface of the pump body shell and is connected to the control module. The conductive component can be a hard conductive column or a flexible wire. In the embodiment using a hard conductive column, in order to better insulate, a heat insulating material is installed between the control module and the pump body so that the heat of the high-temperature liquid in the pump head can only be conducted to the pump body and cannot be further conducted to the control module. Alternatively, a radiator (for example, a cooling fan) is installed between the control module and the pump body to further reduce the temperature of the control module. In the embodiment using a flexible wire, the wire can be set very long, the control module can be far away from the pump body, and the heat from the pump head and the pump body is difficult to reach the control module.

[0072] The concept of the present invention is further described below through specific embodiments in conjunction with the accompanying drawings.

[0073] Example 1

[0074] The split type high temperature resistant electronic water pump provided in this embodiment is as follows Figures 1 to 3The electronic water pump is mainly composed of a pump head 100, a pump body 200, a control module 300 and a heat insulation component 400. The pump head 100 is located at the head of the electronic water pump, the pump body 200 is located in the middle of the electronic water pump, the control module 300 is located at the tail of the pump body 200, and the heat insulation component 400 is installed between the pump body 200 and the control module 300. Figure 1 shown.

[0075] like Figure 2 As shown, the front end of the pump head 100 is the pump head cavity 110, and an impeller (not shown in the figure) is installed in the pump head cavity 110. The front end of the pump head cavity 110 is the liquid inlet 111, and the side of the pump head cavity 110 is the liquid outlet 112. The liquid circulated by the electronic water pump enters the pump head cavity 110 from the liquid inlet 111, and after being driven by the rotating impeller, the liquid is output from the liquid outlet 112. The liquid inlet 111 and the liquid outlet 112 are arranged perpendicular to each other, which conforms to the principles of fluid mechanics. The connection between the pump head 100 and the pump body 200 is sealed and fixed in a flange manner and can be separated. After long-term use, if dirt accumulates in the pump head cavity 110, the pump head cavity 110 can be separated from the pump body 200, the impeller can be taken out for cleaning, and then the inner wall of the pump head cavity 110 can be cleaned.

[0076] The outside of the pump body 200 is the pump body shell 210. The motor stator (not shown in the figure) and the motor rotor (not shown in the figure) are installed in the pump body shell 210. The head of the motor rotor extends from the front end surface of the pump body shell 210 to the pump head cavity 110, and then it is connected to the impeller of the water pump. After the motor is powered on, the motor rotor drives the impeller to rotate. Most of the electrical energy is converted into mechanical energy for the rotation of the motor rotor and impeller, but a small part of the electrical energy is converted into heat, causing the motor stator to heat up, and this heat is transferred to the pump body shell 210. Preferably, the pump body shell 210 is made of metal material, and longitudinal heat dissipation fins 211 are provided on its surface, such as Figure 2 shown.

[0077] The control module 300 is separated from the pump body 200. For an electronic water pump with an outer diameter of 8 to 10 cm for the pump head, the control module 300 is at least 2 cm away from the pump body 200. For larger or smaller electronic water pumps, the distance between the control module and the pump body can be enlarged or reduced according to the above ratio. This distance ensures that the heat of the pump head 100 and the pump body 200 will not be transferred to the electronic components of the control module 300 in large quantities, because the heat resistance temperature of the electronic components is not high. The control module 300 is used to control the motor and is connected to the motor through three conductive posts 220. The first end of each conductive post 220 is connected to the edge of the rear end face 212 of the pump body shell, such as Figure 2As shown. The second end of the conductive column 220 is connected to the bottom edge of the control box bottom 310. The motor uses three-phase electricity, and each conductive column 220 is connected to one phase of electricity. The three conductive columns 220 are insulated and arranged at equal intervals. In order to make the connection between the control module 300 and the pump body 200 more firmly, three connecting columns 230 are used to reinforce the connection, as shown in FIG. Figure 2 The first end of the connecting column 230 is connected to the edge of the rear end surface 212 of the pump housing, and the second end is connected to the bottom edge of the control box bottom 310. All the conductive columns 220 and the connecting columns 230 are spaced apart from each other and arranged in a circle at equal distances.

[0078] The control module 300 includes a control box and a control board, and the control board is installed in the control box. The control box is formed by buckling the control box bottom 310 and the control box cover 320. In order to enhance heat dissipation, the control box cover 320 is provided with heat dissipation fins 321, such as Figure 3 shown.

[0079] The heat insulating component 400 is a short cylindrical body, installed between the pump body 200 and the control module 300, and located in the space surrounded by the three conductive pillars 220 and the three connecting pillars 230. In addition, one surface of the heat insulating component 400 is fixed to the rear end surface 212 of the pump body 200, and the other surface is suspended from the bottom surface of the control box bottom 310 by a certain distance, such as Figure 1 The heat insulating component 400 can be made of heat insulating materials such as common heat insulating cotton, polymer foaming material, and aerogel.

[0080] The working process of the electronic water pump is as follows:

[0081] (1) Connect the power supply to the electronic water pump and control the motor to rotate so that a pressure difference is formed inside and outside the pump head cavity;

[0082] (2) The above pressure difference presses the liquid medium into the pump head cavity 110 through the liquid inlet 111 and then discharges it from the liquid outlet 112;

[0083] (3) According to the signal input from the electronic water pump control board, the motor adjusts the speed to control the suction and discharge of a certain amount of liquid to form a relatively stable flow rate.

[0084] Example 2

[0085] The split type high temperature resistant electronic water pump provided in this embodiment is as follows Figures 4 to 8 The electronic water pump is mainly composed of a pump head 100, a pump body 200, a control module 500 and a fan 600. The pump head 100 is located at the head of the electronic water pump, the pump body 200 is located in the middle of the electronic water pump, the control module 500 is located at the tail of the pump body 200, and the fan 600 is installed between the pump body 200 and the control module 500. Figure 1The pump body 200 and the control module 500 are connected by means of a conductive column 220 and a connecting column 230, wherein the conductive column 220 is used for conducting electricity and the connecting column 230 is used for reinforcing the connection. The pump head 100, the pump body 200, the conductive column 220, the connecting column 230, etc. are consistent with their respective shapes, structures, and functions in Example 1, and will not be described in detail in this example.

[0086] The control module 500 includes a control box and a control board, such as Figures 6 to 8 The control box is formed by buckling the control box bottom 510 and the control box cover 520, and the control board 530 is installed in the control box. In order to enhance heat dissipation, the control box cover 520 is provided with heat dissipation fins 523, as shown in FIG. Figure 8 shown.

[0087] The bottom 510 of the control box is provided with ventilation holes 511 and 512 to facilitate air circulation. Figure 6 The control panel 530 is provided with two ventilation holes 531, as shown in FIG. Figure 7 The control box cover 520 is provided with two ventilation pipes: ventilation pipe 521 and ventilation pipe 522. Figure 8 When the control box cover 520 is buckled onto the control box bottom 510, the ventilation pipes 521 and 522 pass through a ventilation hole 531 of the control board 530 respectively, and then dock with the ventilation holes 511 and 512 of the control box bottom 510 and seal, so that the interior of the control box is a closed space, the control board 530 is protected by the waterproof and dustproof control box, but air can pass through the air duct formed by the ventilation pipes and ventilation holes.

[0088] The fan 600 is installed between the pump body 200 and the control module 500. Figure 4 The fan 600 is composed of a fan housing 610, fan blades, and a protective cover 620. Figure 5 The fan blades are installed in the fan housing 610, and the protective cover 620 covers the opening of the fan housing 610 to provide protection for the fan blades. Figure 5 The motor shaft 240 extends from the center of the rear end surface 212 of the pump body 200, and the fan blades are connected to the end of the motor shaft 240, as shown in FIG. Figure 4 shown.

[0089] As the motor rotates, the motor rotor drives the water pump impeller and the fan blades to rotate at the same time. The advantage of this arrangement is that there is no need to provide a separate power supply and control for the fan, which simplifies the parts of the water pump and improves the working stability and service life. The faster the impeller rotates, the more hot liquid flows, and the heat conducted to the rear end face 212 of the pump body also increases. At this time, the faster the fan blades rotate, the faster the heat dissipation of the pump body 200 is accelerated. According to factors such as the temperature and viscosity of the liquid, by designing the number and size of the blades, the fan heat dissipation power is matched with the power of the water pump impeller to ensure heat dissipation efficiency. Furthermore, a set of acceleration gear set or reduction gear set can be installed on the motor shaft 240 to more accurately adjust the speed of the fan to ensure heat dissipation efficiency.

[0090] The fan 600 exists to prevent the heat of the pump body rear end surface 212 from being transferred to the electronic components in the control module 500. Obviously, when the fan blades of the fan 600 rotate, cold air blows from the bottom surface of the control box 510 to the pump body rear end surface 212. At this time, the air duct (ventilation pipe 521, ventilation pipe 522, ventilation hole 511, ventilation hole 522) running through the control box plays a role in guiding the wind. As the fan 600 rotates, cold air flows through the two air ducts, dissipating heat for the control module 500 and taking away the heat generated by the electronic components themselves.

[0091] Example 3

[0092] The split type high temperature resistant electronic water pump provided in this embodiment is as follows Fig. 9 As shown. The electronic water pump is mainly composed of a pump head 100, a pump body 200, and a control module 700. The pump head 100 is located at the head of the electronic water pump, the pump body 200 is located in the middle of the electronic water pump, and the control module 700 is connected to the tail of the pump body 200 through a wire 730. The pump head 100 is the same as that in Example 1 and will not be described here. Because the control module 700 is far away from the pump body 200, the heat of the pump body 200 is difficult to transfer to the control module 700, and the pump body 200 can withstand high temperatures because it does not have electronic components. In this embodiment, no additional cooling fins are required on the surface of the pump body shell.

[0093] The control module 700 includes a control box and a control board. The control box is formed by the control box bottom 710 and the control box cover 720 being buckled together, and the control board is installed in the control box. There are four protruding mounting holes 711 on the edge of the control box bottom 710, and the control box can be fixed somewhere (for example, the inner wall of the fuel cell box) by passing four screws through the mounting holes 711. The wire 730 is flexible and its length is not limited, as long as it ensures that the heat of the pump head 100 is not transferred to the control module 700 and affects the normal operation of the electronic components.

[0094] Example 4

[0095] In Example 3, the control module 700 is dedicated to the electronic water pump. Because the fuel cell system is a complex multi-module system, it must have a system master control module (main control board). Since the control module 700 of the electronic water pump can be placed in any position, the control module of the electronic water pump can be further integrated into the master control module of the fuel cell system, thus eliminating the separate electronic water pump control board and replacing it with the overall control of the main control board, thereby strengthening the coordination of various modules of the fuel cell system. In this way, there is no need for a control box, and the electronic water pump only needs to be connected to the main control board via a soft wire.

[0096] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A split type high temperature resistant electronic water pump, characterized in that: include: A pump head, the pump head comprising a pump head cavity and an impeller, the pump head cavity having a liquid inlet and a liquid outlet, and the impeller being installed in the pump head cavity; A pump body, wherein the pump body is connected to the pump head; the pump body comprises a pump body shell, a motor stator, and a motor rotor, wherein the motor stator and the motor rotor are installed in the pump body shell, and the motor rotor is connected to the impeller; A control module, the control module is separated from the pump body and electrically connected to the pump body by means of a conductive component; The control module includes a control box and a control board, and the control board is installed in the control box; The conductive component includes three hard conductive columns, the first end of each conductive column is connected to the edge of the rear end surface of the pump body shell, and the second end of the conductive column is connected to the edge of the bottom surface of the control box; the outer surface of each conductive column is insulated, and one of the three-phase electricity is conducted inside; It also includes at least three connecting columns, each of which has a first end connected to the rear end edge of the pump shell, and a second end connected to the bottom edge of the control box, and all conductive columns and connecting columns are spaced apart from each other.

2. A split type high temperature resistant electronic water pump according to claim 1, characterized in that: A heat insulating component is installed in the space between the rear end surface of the pump body shell and the bottom surface of the control box.

3. A split type high temperature resistant electronic water pump according to claim 1, characterized in that: A heat dissipation fan is installed in the space between the rear end surface of the pump body shell and the bottom surface of the control box.

4. A split type high temperature resistant electronic water pump according to claim 3, characterized in that: The cooling fan is configured such that when the fan blades rotate, wind blows from the bottom surface of the control box toward the rear end surface of the pump body shell.

5. A split type high temperature resistant electronic water pump according to claim 4, characterized in that: The control box is formed by buckling a control box bottom and a control box cover, and the control box is provided with an air guide hole penetrating the control box bottom and the control box cover.

6. A split type high temperature resistant electronic water pump according to claim 3, characterized in that: The fan blades of the heat dissipation fan are connected to the motor rotor.

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