Electromagnetic drive magnetofluid miniature water pump

Abstract

The invention discloses an electromagnetic drive magnetofluid micro water pump which comprises a fluid pump cavity, an electromagnet, a magnetofluid cavity and a PLC. The fluid pump cavity is an annular pump cavity and is provided with a water inlet, a water outlet, a water pumping flow channel and a magnetic fluid liquid supplementing cavity, the water inlet and the water outlet are communicated with the water pumping flow channel, and the magnetic fluid liquid supplementing cavity is formed in the portion, between the water inlet and the water outlet, of the water pumping flow channel and provided with a permanent magnet; the magnetic fluid is controlled to form sealing between the water pumping flow channel and the magnetic fluid liquid supplementing cavity; the electromagnets are arranged on the periphery of the water pumping flow channel and form an electromagnetic field under the alternating electrifying effect. The plurality of magnetic fluid chambers are arranged in the water pumping runner and are used for pushing fluid under the action of an electromagnetic field; and the PLC is connected with the plurality of electromagnets and is used for realizing automatic alternate electrification. The magnetic fluid pump has the advantages that the magnetic fluid responds to a magnetic field quickly and is not driven by an external motor, is suitable for combinations with different water pumping requirements, can achieve certain water pumping capacity in a noiseless environment, and is simple and compact in structure.

Description

Technical Field

[0001] The present application relates to the technical field of water pumps, and in particular to an electromagnetically driven magnetic fluid micro water pump. Background Art

[0002] Magnetic fluids exhibit the characteristics of liquids when there is no external magnetic field, but have strong magnetism under an external magnetic field, good magnetic responsiveness and fluidity, and their movement and flow behavior can be regulated by the magnetic field. The application of magnetic fluid technology in micro water pumps combines the technology of magnetic field control and fluid mechanics, and has the characteristics of non-contact and no mechanical moving parts, which is suitable for many application scenarios that are difficult to cover with traditional water pumps.

[0003] At present, most magnetofluid micro water pumps rely on motor drive as the power source input, which will produce certain noise due to vibration. They are not suitable for some precision electrical and noise-free scenarios. Summary of the invention

[0004] In view of this, the present invention provides an electromagnetically driven magnetic fluid micro water pump, which can be used in some occasions requiring miniaturization, contactlessness and high precision, and does not require additional drive from an external motor. The output power can be adjusted automatically without interfering with each other, and can be regulated according to actual equipment needs. The structure is simple and compact.

[0005] Specifically, the technical solution of the present application is an electromagnetic driven magnetic fluid micro pump

[0006] It includes: a fluid pump chamber, an electromagnet, a magnetic fluid chamber and a PLC controller;

[0007] The fluid pump chamber is an annular pump chamber, having a water inlet, a water outlet, a water pumping channel and a magnetic fluid replenishing chamber, the water inlet and the water outlet are connected to the water pumping channel, the magnetic fluid replenishing chamber is arranged in the water pumping channel between the water inlet and the water outlet, and a permanent magnet is arranged on the magnetic fluid replenishing chamber to control the magnetic fluid in the magnetic fluid replenishing chamber to form a seal between the water pumping channel and the magnetic fluid replenishing chamber;

[0008] A plurality of said electromagnets are arranged on the periphery of said pump water flow channel, and form an electromagnetic field under the action of alternating power supply;

[0009] The plurality of magnetic fluid chambers are arranged inside the pump water flow channel for pushing the fluid under the action of the electromagnetic field; the PLC controller is connected to the plurality of electromagnets for realizing automatic alternating power supply.

[0010] According to a preferred embodiment, the electromagnet is an electromagnetic coil, which is wound around the outer periphery of the pump water flow channel, including a first electromagnetic coil, a second electromagnetic coil, a third electromagnetic coil, a fourth electromagnetic coil and a fifth electromagnetic coil spaced apart in sequence, and the alternating power supply is performed in sequence according to an adjacent position relationship.

[0011] According to a preferred embodiment, the magnetic fluid chamber includes a first chamber, a second chamber and a third chamber which are spaced apart in sequence, and the first chamber, the second chamber and the third chamber push the fluid from the water inlet to the water outlet under the action of the electromagnetic field of the electromagnetic coil.

[0012] According to a preferred embodiment, the movement of the first chamber, the second chamber and the third chamber is clockwise.

[0013] Furthermore, the PLC controller controls the movement speed of the first chamber, the second chamber and the third chamber by controlling the power-on time and the current size.

[0014] According to a preferred embodiment, the magnetic fluid replenishment chamber is located in the water pump flow channel on the shorter side between the water inlet and the water outlet.

[0015] Furthermore, the magnetic fluid chamber is provided with a magnetic fluid injection port for injecting magnetic fluid.

[0016] According to a preferred embodiment, the permanent magnet is a neodymium magnet fixed to the outer surface of the magnetic fluid replenishment chamber.

[0017] According to a preferred embodiment, the magnetic fluid replenishing chamber is located between the water inlet and the water outlet on a side close to the water inlet.

[0018] According to a preferred embodiment, the length of the water outlet is greater than the length of the water inlet.

[0019] The electromagnetic driven magnetic fluid micro water pump provided by the present invention controls the magnetic fluid chamber through the electromagnetic field to push the pumped liquid, does not require an external motor, eliminates the noise caused by mechanical vibration, and is suitable for applications that are sensitive to noise and vibration. The PLC controller realizes high-precision fluid control by alternating power to the electromagnet to meet the pumping needs of different scenarios. At the same time, the structure is simple and compact, and has the inherent characteristics of the micro water pump itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the composition of an electromagnetic driven magnetic fluid micro water pump of the present application (PLC controller omitted);

[0021] Figure 2 yes Figure 1 A cross-sectional view of a fluid pump chamber in FIG.

[0022] Figure 3 yes Figure 1 Schematic diagram of the distribution of the magnetic fluid chamber.

[0023] Explanation of the accompanying drawings: 1-water inlet, 2-water outlet, 3-water pumping channel, 4-magnetic fluid replenishing chamber, 5-first electromagnetic coil, 6-second electromagnetic coil, 7-third electromagnetic coil, 8-fourth electromagnetic coil, 9-fifth electromagnetic coil, 10-first chamber, 11-second chamber, 12-third chamber, 13-pumped liquid, 14-magnetic fluid injection port, 15-permanent magnet. DETAILED DESCRIPTION

[0024] Magnetic fluids exhibit the characteristics of liquids when there is no external magnetic field, but have strong magnetism under an external magnetic field, good magnetic responsiveness and fluidity, and their movement and flow behavior can be regulated by the magnetic field. The application of magnetic fluid technology in micro water pumps combines the technology of magnetic field control and fluid mechanics, and has the characteristics of non-contact and no mechanical moving parts, which is suitable for many application scenarios that are difficult to cover with traditional water pumps.

[0025] At present, most magnetofluid micro water pumps rely on motor drive as the power source input, which will produce certain noise due to vibration. They are not suitable for some precision electrical and noise-free scenarios.

[0026] In view of this, the present invention provides an electromagnetically driven magnetic fluid micro water pump, which can be used in some occasions requiring miniaturization, contactlessness and high precision, and does not require additional drive from an external motor. The output power can be adjusted automatically without interfering with each other, and can be regulated according to actual equipment needs. The structure is simple and compact.

[0027] Specifically, Figures 1 to 3 As shown, the technical solution of the present application is an electromagnetic driven magnetic fluid micro water pump, comprising: a fluid pump chamber, an electromagnet, a magnetic fluid chamber and a PLC controller;

[0028] The fluid pump chamber is an annular pump chamber, having a water inlet 1, a water outlet 2, a water pumping channel 3 and a magnetic fluid replenishing chamber 4, wherein the water inlet 1 and the water outlet 2 are connected to the water pumping channel 3, the magnetic fluid replenishing chamber 4 is arranged in the water pumping channel 3 between the water inlet 1 and the water outlet 2, and a permanent magnet 15 is arranged on the magnetic fluid replenishing chamber 4, which is used to control the magnetic fluid in the magnetic fluid replenishing chamber 4 to form a seal between the water pumping channel 3 and the magnetic fluid replenishing chamber 4 to prevent the pumped liquid 13 from flowing back;

[0029] A plurality of electromagnets are arranged on the outer periphery of the water pump channel 3, and form an electromagnetic field under the action of alternating power supply;

[0030] The plurality of magnetic fluid chambers are arranged inside the water pump channel 3 for pushing the fluid under the action of the electromagnetic field; the PLC controller is connected to the plurality of electromagnets for realizing automatic alternating power supply.

[0031] An embodiment of the present application is:

[0032] A plurality of electromagnets and a fluid pump chamber are fixed by a fixing device and connected to a PLC controller. The PLC controller adjusts the plurality of electromagnets to be energized alternately to generate a rotating electromagnetic field. At the same time, the magnetic fluid in the magnetic fluid replenishment chamber 4 responds to the permanent magnet 15 above, adsorbs and fills the cross section of the flow channel, and forms a magnetic fluid seal, so that the pumped liquid 13 at the water outlet 2 does not flow back. The magnetic fluid in the magnetic fluid chamber responds to the rotating electromagnetic field, and the magnetic fluid chamber rotates in the same direction as the electromagnetic field is energized. The pumped liquid 13 is pumped out from the water outlet 2 under the push of the magnetic fluid chamber.

[0033] It can be understood that after the magnetic fluid chamber passes through the magnetic fluid replenishing chamber 4, the magnetic fluid in the magnetic fluid replenishing chamber 4 will respond to the permanent magnet 15 above again and re-form the seal.

[0034] When in use, firstly, the electromagnet near the water inlet 1 is energized to attract the magnetic fluid chamber and pump the pumped liquid 13 there. Then, the current of this electromagnet is disconnected, and then the next adjacent electromagnet is controlled to repeat this process until the water outlet 2, thereby completing the pumping of the pumped liquid 13 from the water inlet 1 to the water outlet 2.

[0035] The pumped liquid 13 may be water or other liquids that can be pushed by the magnetic fluid chamber.

[0036] Compared with the prior art, this electromagnetically driven magnetic fluid micro water pump has the advantages of rapid magnetic fluid response to magnetic field and no external motor drive, and can output the corresponding magnetic field by adjusting the current in the electromagnetic coil. It is suitable for combinations with different water pumping requirements, can achieve a certain water pumping capacity in a noise-free environment, and has a simple and compact structure.

[0037] Preferably, the water inlet 1 is designed with a filter to prevent impurities from entering the pump chamber.

[0038] The number and distribution distance of the electromagnets are customized according to the size of the pump chamber and the fluid dynamics requirements to ensure the optimal distribution of the electromagnetic field. Multiple electromagnets are arranged around the pump water channel 3 to generate alternating electromagnetic fields when alternately energized. The design and arrangement of the electromagnets should ensure that the electromagnetic field can evenly cover the entire pump water channel 3 to achieve efficient fluid propulsion.

[0039] The magnetic fluid chambers are multiple small chambers inside the pump water flow channel 3, which contain magnetic fluid to push the pumped liquid 13 under the action of the electromagnetic field. The design of these chambers allows the magnetic fluid to respond quickly when the electromagnetic field changes to achieve efficient transmission. The material of the magnetic fluid chamber has good magnetic permeability and chemical stability to ensure long-term reliability and efficiency.

[0040] The PLC controller automatically controls the alternating power supply of the electromagnet according to a preset program logic, and preferably allows the operator to adjust the alternating frequency as required.

[0041] According to a preferred embodiment, the electromagnet is an electromagnetic coil, which is wound around the outer periphery of the pump water flow channel 3, including a first electromagnetic coil 5, a second electromagnetic coil 6, a third electromagnetic coil 7, a fourth electromagnetic coil 8 and a fifth electromagnetic coil 9 which are spaced apart in sequence, and the alternating power supply is performed in sequence according to the adjacent position relationship.

[0042] During operation, each electromagnetic coil is connected to the PLC controller and starts to be energized. First, the first electromagnetic coil 5 starts to be energized to adsorb the magnetic fluid chamber near the water inlet 1. When the magnetic fluid chamber is adsorbed to the first electromagnetic coil 5, the PLC controller disconnects the current of the first electromagnetic coil 5 and passes the second electromagnetic coil 6. The magnetic fluid chamber continues to be adsorbed to the second electromagnetic coil 6 and then controls the power to be cut off. Similarly, the third electromagnetic coil 7, the fourth electromagnetic coil 8 and the fifth electromagnetic coil 9 are processed in sequence, so that the magnetic fluid chamber starts to rotate clockwise.

[0043] The electromagnetic coil can be made of copper wire or alloy wire with high conductivity and low resistivity to reduce energy loss and improve magnetic field efficiency; at the same time, the outside of the coil is made of heat-resistant and chemical-resistant insulating material to protect the coil and prevent short circuit; and, to ensure uniform distribution of the magnetic field, the coil is tightly and evenly wound; and the arrangement of these coils should ensure that they can cover the entire pump water flow channel 3 to achieve continuous propulsion.

[0044] Accordingly, the PLC controller needs to write a specific program to control the alternating energization of the coils according to the arrangement of the electromagnetic coils and the requirements of fluid dynamics. That is, the program of the PLC controller should include parameters such as the order, time, and current size of the coil energization to achieve precise fluid control.

[0045] According to a preferred embodiment, the magnetic fluid chamber includes a first chamber 10, a second chamber 11 and a third chamber 12 which are spaced in sequence, and the first chamber 10, the second chamber 11 and the third chamber 12 push the fluid from the water inlet 1 to the water outlet 2 under the action of the electromagnetic field of the electromagnetic coil. The movement of the first chamber 10, the second chamber 11 and the third chamber 12 is clockwise, which is the same as the direction formed by the order in which the electromagnetic coil is energized.

[0046] According to a preferred embodiment, the magnetic fluid replenishment chamber 4 is located in the shorter side of the pumping channel 3 between the water inlet 1 and the water outlet 2. The consideration of this arrangement is to allow the pumped liquid 13 to be pumped through the longer side of the pumping channel 3 to help the electromagnet guide the magnetic fluid chamber to improve work efficiency.

[0047] Furthermore, Figure 3 As shown, the magnetic fluid chamber is provided with a magnetic fluid injection port 14 for injecting magnetic fluid.

[0048] The magnetic fluid chamber may be made of plastic as its shell, and the magnetic fluid is injected through the magnetic fluid injection port 14 .

[0049] According to a preferred embodiment, the permanent magnet 15 is a neodymium magnet, which is fixed to the outer surface of the magnetic fluid replenishing chamber 4 .

[0050] Furthermore, the magnetic fluid replenishment chamber 4 is located between the water inlet 1 and the water outlet 2, on the side close to the water inlet 1, so as to enhance the unidirectional flow characteristics of the pump, ensuring that the pumped liquid 13 can only flow from the water inlet 1 to the water outlet 2 in a clockwise direction, and further preventing the pumped liquid 13 from flowing back from the water outlet 2 to the water inlet.

[0051] According to a preferred embodiment, the length of the water outlet 2 is greater than the length of the water inlet 1. The longer water outlet 2 can provide a smoother transition area for the pumped liquid 13 to the output pipe, helping to reduce the turbulence and eddy current of the fluid when it flows out, thereby reducing power loss, improving the efficiency of the pump, and reducing the possibility of backflow. The shorter length of the water inlet 1 can accelerate the speed of the pumped liquid 13 entering the fluid pump cavity, reduce stagnation at the inlet, thereby improving the suction efficiency, and contributing to the compact design of the micro water pump structure.

[0052] The above is a detailed introduction to an electromagnetically driven magnetic fluid micro water pump provided in an embodiment of the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0053] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0054] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

Claims

1. An electromagnetically driven magnetic fluid micro water pump, characterized in that: include: Fluid pump chamber, electromagnet, magnetic fluid chamber and PLC controller; The fluid pump chamber is an annular pump chamber, having a water inlet, a water outlet, a water pumping channel and a magnetic fluid replenishing chamber, the water inlet and the water outlet are connected to the water pumping channel, the magnetic fluid replenishing chamber is arranged in the water pumping channel between the water inlet and the water outlet, and a permanent magnet is arranged on the magnetic fluid replenishing chamber to control the magnetic fluid in the magnetic fluid replenishing chamber to form a seal between the water pumping channel and the magnetic fluid replenishing chamber; A plurality of said electromagnets are arranged on the periphery of said pump water flow channel, and form an electromagnetic field under the action of alternating power supply; A plurality of magnetic fluid chambers are arranged inside the pump water flow channel, and are used to push the fluid under the action of the electromagnetic field; The PLC controller is connected to the plurality of electromagnets to realize automatic alternating power supply.

2. The electromagnetic driven magnetic fluid micro water pump according to claim 1, characterized in that: The electromagnet is an electromagnetic coil, which is wound around the outer periphery of the pump water flow channel and includes a first electromagnetic coil, a second electromagnetic coil, a third electromagnetic coil, a fourth electromagnetic coil and a fifth electromagnetic coil which are spaced apart in sequence. The alternating energization is performed in sequence according to the adjacent position relationship.

3. The electromagnetic driven magnetic fluid micro water pump according to claim 2, characterized in that: The magnetic fluid chamber comprises a first chamber, a second chamber and a third chamber which are spaced apart in sequence. The first chamber, the second chamber and the third chamber push the fluid from the water inlet to the water outlet under the action of the electromagnetic field of the electromagnetic coil.

4. The electromagnetic driven magnetic fluid micro water pump according to claim 3, characterized in that: The movement of the first chamber, the second chamber and the third chamber is clockwise.

5. The electromagnetic driven magnetic fluid micro water pump according to claim 4, characterized in that: The PLC controller controls the movement speed of the first chamber, the second chamber and the third chamber by controlling the power-on time and the current size.

6. The electromagnetic driven magnetic fluid micro water pump according to claim 1, characterized in that: The magnetic fluid replenishing chamber is located at the water pumping channel on the shorter side between the water inlet and the water outlet.

7. The electromagnetic driven magnetic fluid micro water pump according to claim 1, characterized in that: The magnetic fluid chamber is provided with a magnetic fluid injection port for injecting magnetic fluid.

8. The electromagnetic driven magnetic fluid micro water pump according to claim 1, characterized in that: The permanent magnet is a neodymium magnet, which is fixed on the outer surface of the magnetic fluid replenishment cavity.

9. The electromagnetic driven magnetic fluid micro water pump according to claim 1, characterized in that: The magnetic fluid replenishing chamber is located between the water inlet and the water outlet on one side close to the water inlet.

10. The electromagnetic driven magnetic fluid micro water pump according to claim 1, characterized in that: The length of the water outlet is greater than the length of the water inlet.

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