Miniature water pump and water pumping equipment

Abstract

The invention relates to the technical field of miniature water pumps, in particular to a miniature water pump and water pumping equipment, the miniature water pump comprises a shell, a water pumping mechanism and a molecular film assembly, and the shell is provided with an air inlet channel and a liquid passing channel; the water pumping mechanism comprises a driving motor, an eccentric part, a swing frame and a leather cup assembly which are sequentially connected, the leather cup assembly comprises a first leather cup and a second leather cup, the first leather cup and the second leather cup are both connected with the swing frame, a cavity of the first leather cup is communicated with the air inlet channel, and a cavity of the second leather cup is communicated with the liquid passing channel; the molecular film assembly is provided with a molecular film, and the molecular film is arranged in the air inlet channel. The invention mainly aims to provide a miniature water pump, and aims to improve the liquid fluidity during liquid pumping.

Description

Technical Field

[0001] This invention relates to the field of micro water pump technology, and particularly to a micro water pump and pumping equipment. Background Technology

[0002] A miniature water pump is a small water pump that is typically used to lift, transport, or pressurize liquids. It transfers the mechanical energy of a prime mover or other external energy to the liquid, increasing the liquid's energy and thus achieving the purpose of pumping the liquid.

[0003] A miniature water pump typically consists of a motor, a base cover, an eccentric rubber wheel, a connecting rod, a swing arm, a cylinder, a piston cup, a valve plate, an umbrella-shaped support, and a top cover. The base cover is fixed to the end face of the motor with the output shaft. The base cover, cylinder, piston cup, valve plate, and top cover are connected in sequence. The eccentric rubber wheel is fixed to the output shaft of the motor. The connecting rod connects the eccentric rubber wheel and the swing arm. The swing arm is connected to the piston cup. Specifically, the motor drives the piston cup to perform a compound motion, thereby compressing and stretching the air inside the piston cup, thus achieving the water pumping function.

[0004] When a miniature water pump is used with a sealed or negative pressure container, the liquid is difficult to extract smoothly due to the negative pressure or vacuum environment inside the container. This is because, under negative pressure, the external pressure on the liquid is less than atmospheric pressure, and the inlet of a traditional miniature water pump cannot effectively create sufficient negative pressure to overcome the negative pressure inside the container, thus preventing the liquid from being smoothly drawn into the pump. Summary of the Invention

[0005] The main objective of this invention is to provide a miniature water pump designed to improve the fluidity of liquids during pumping.

[0006] To achieve the above objectives, the micro water pump includes: A housing having an air inlet channel and a liquid outlet channel; A water pumping mechanism, comprising a drive motor, an eccentric component, a swing frame, and a leather cup assembly connected in sequence. The leather cup assembly includes a first leather cup and a second leather cup, both connected to the swing frame. The chamber of the first leather cup communicates with the air intake channel, and the chamber of the second leather cup communicates with the liquid passage channel. A molecular membrane assembly having a molecular membrane disposed in the air intake channel.

[0007] In one embodiment of the present invention, the molecular membrane is located on the side of the first cup near the air outlet end of the air inlet channel.

[0008] In one embodiment of the present invention, the outlet surface of the molecular membrane is inclined beyond the inlet channel.

[0009] In one embodiment of the present invention, the housing is provided with a fixing slot, the inner wall of the fixing slot is provided with an elastic protrusion, the molecular membrane assembly includes the molecular membrane and a fixing frame, the molecular membrane is fixedly disposed on the fixing frame; the fixing frame is engaged in the fixing slot, the fixing frame is provided with a positioning hole adapted to the elastic protrusion, and the elastic protrusion is inserted into the positioning hole.

[0010] In one embodiment of the present invention, the air intake channel gradually decreases in size from the air intake end to the air outlet end.

[0011] In one embodiment of the present invention, the air intake channel gradually increases in size from the air intake end to the air outlet end.

[0012] In one embodiment of the present invention, the air intake channel and the liquid passage are isolated from each other.

[0013] In one embodiment of the present invention, the air outlet end of the air inlet channel is provided with a second molecular membrane.

[0014] The present invention also proposes a water pumping device, which includes the aforementioned micro water pump.

[0015] In the technical solution of this invention, the micro water pump can be used in aquarium equipment such as water dispensers and soap dispensers. The air inlet channel is used to supply air to the container, and the liquid passage is used to pump liquid (wherein, the liquid includes water, mixtures, etc.). Specifically, when both the air inlet channel and the liquid passage are connected to a sealed container, the motor can synchronously drive the first and second rubber cups to perform linear reciprocating motion through the eccentric component and the swing component, thereby changing the air pressure in the chambers of the first and second rubber cups. When the first and second rubber cups are in a negative pressure state, outside air enters the air inlet channel through the air pressure difference, and then enters the sealed container through the molecular membrane. At the same time, the air pressure in the sealed container decreases as the liquid decreases, but with the replenishment of gas, the air pressure in the sealed container is in a dynamic pressurization state, which facilitates the liquid in the sealed container to flow out of the liquid passage. At the same time, the property of the molecular membrane to be permeable and impermeable to liquid can prevent the liquid in the sealed container from flowing back into the air inlet channel, thereby preventing liquid leakage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the micro water pump provided by the present invention.

[0018] Explanation of icon numbers: 10. Shell; 10a. Air inlet channel; 10b. Liquid passage; 20. Pumping mechanism; 21. Drive motor; 22. Eccentric component; 23. Frame; 24. First cup; 25. Second cup; 30. Molecular membrane.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] Please see Figure 1 The miniature water pump includes: Housing 10, the housing 10 having an air inlet channel 10a and a liquid passage 10b; A pumping mechanism 20 includes a drive motor 21, an eccentric component 22, a swing frame 23, and a leather cup assembly connected in sequence. The leather cup assembly includes a first leather cup 24 and a second leather cup 25, both connected to the swing frame 23. The chamber of the first leather cup 24 is connected to the air inlet channel 10a, and the chamber of the second leather cup 25 is connected to the liquid passage 10b. A molecular membrane 30 assembly, wherein the molecular membrane 30 assembly has a molecular membrane 30 disposed in the air intake channel 10a.

[0024] In the technical solution of this invention, the miniature water pump can be used in aquarium equipment such as water dispensers and soap dispensers. The air intake channel 10a is used to supply air to the container, and the liquid passage 10b is used to pump liquid (wherein the liquid includes water, a mixture, etc.). Specifically, when both the air intake channel 10a and the liquid passage 10b are connected to a sealed container, the motor can synchronously drive the first and second cups 24 and 25 to perform linear reciprocating motion through the eccentric component 22 and the swing component, thereby changing the air pressure in the chambers of the first and second cups 24 and 25. When the first and second cups 24 and 25 are in a negative pressure state, outside air enters the air intake channel through the pressure difference. 10a, then enters the sealed container through the molecular membrane 30. At the same time, the gas pressure in the sealed container decreases as the liquid decreases, but with the replenishment of gas, the gas pressure in the sealed container is in a dynamic pressurization state, which facilitates the liquid in the sealed container to flow out of the liquid passage 10b. At the same time, the gas-permeable and liquid-blocking properties of the molecular membrane 30 can prevent the liquid in the sealed container from flowing back to the air inlet channel 10a, thus preventing liquid leakage. The gas replenishment through the molecular membrane 30 can dynamically stabilize the gas pressure in the sealed container in a "slight negative pressure" state, which not only overcomes the obstruction of the negative pressure environment to liquid extraction, but also uses the pressure difference to maintain the continuous flow of liquid.

[0025] Understandably, this miniature water pump can be applied to water dispensers, soap dispensers, medical equipment, and other fields, meaning it can meet most liquid extraction scenarios. The liquid can be tap water, shower gel, testing solutions, etc., without any limitations.

[0026] It is also understandable that the entire pumping mechanism 20 can be concealed within the housing 10. For example, the drive motor 21 is located at the bottom of the housing 10. The pumping mechanism 20, from bottom to top, consists of the drive motor 21, the eccentric component 22, the swing frame 23, and the cup assembly. The eccentric component 22 is fixedly connected to the output shaft of the drive motor 21, and the swing frame 23 is fixedly inserted into the eccentric hole of the eccentric component 22. The bottom of the cup assembly is connected to the side of the swing frame 23 away from the eccentric component 22. Thus, when the drive motor 21 rotates, the eccentric component 22 and the swing frame 23 convert the rotational motion of the drive motor 21 into the linear reciprocating motion of the cup assembly, thereby changing the air pressure value of the cup assembly. The leather cup assembly includes a first leather cup 24 and a second leather cup 25. The swing frame 23 has a first connecting side and a second connecting side, which are symmetrically arranged and located on both sides of the output shaft of the drive motor 21. Simultaneously, the first leather cup 24 and the second leather cup 25 are connected to the swing frame 23 in the same posture. Thus, the first leather cup 24 and the second leather cup 25 undergo synchronous compression or stretching deformation. When both the first leather cup 24 and the second leather cup 25 are stretched, they are both under negative pressure. This can be understood as follows: after a certain amount of liquid is extracted from a sealed container, its internal air pressure drops to P1; and after the chamber of the first leather cup 24 is stretched, its air pressure... The value drops to P2. In order for gas to flow from the outside to the sealed container, the pressure difference between standard atmospheric pressure P0 and P2 must be greater than the pressure difference between P1 and P2 to allow the atmosphere to enter the sealed container. In another embodiment, the outer casing of the drive motor 21 is exposed and fixedly connected to the housing 10. Its output shaft passes through the housing 10 and is fixedly connected to the eccentric part 22. The swing frame 23 and the cup assembly are set as in the previous embodiment, and the technical solutions involved are the same, so they will not be repeated here. Based on the above two embodiments, the micro water pump is also provided with a cylinder, valve plate and other structures inside the housing 10. The housing 10 includes an upper shell and a lower shell, which enclose each other in a shape. An installation space is formed, in which part or all of the structure of the pumping mechanism 20 is located. The cylinder is provided with limiting holes corresponding to the first diaphragm 24 and the second diaphragm 25. The first diaphragm 24 and the second diaphragm 25 are movably limited by the limiting holes. The bottom of the two diaphragms passes through the limiting holes and connects to the swing frame 23 so that the reciprocating motion of the first diaphragm 24 and the second diaphragm 25 can be limited and directional, thereby improving the stability of air pumping and water pumping. Based on this, the valve plate is provided with a chamber structure that connects the air inlet channel 10a and the liquid passage 10b. Each chamber structure connects the air inlet channel 10a and the first diaphragm 24, or the liquid passage 10b and the second diaphragm 25, thereby forming a water-air isolation.The air inlet channel 10a and the liquid passage 10b are essentially channels of length and shape formed by the housing 10. Both have orifice structures at both ends. The housing 10 can be manufactured using injection molding, metal 3D printing, micro-extrusion molding, or other methods to create the air inlet channel 10a and the liquid passage 10b. Both the air inlet channel 10a and the liquid passage 10b are designed in a bent shape, forming an "L" shape. The air inlet channel 10a and the liquid passage 10b are located on both sides of the central axis of the motor output shaft, arranged symmetrically. The air inlet of the air inlet channel 10a and the water outlet of the liquid passage 10b are aligned to isolate water and air. The air outlet of the air inlet channel 10a and the water inlet of the liquid passage 10b are both located at the top of the housing 10 to facilitate communication with the internal space of the sealed container. The air inlet channel 10a and the liquid passage 10b can extend into the sealed container using a needle-like structure.

[0027] Further, please refer to Figure 1 The molecular membrane 30 is located on the side of the first cup 24 near the outlet end of the air inlet channel 10a. Thus, the molecular membrane 30 is positioned at the final barrier before gas enters the sealed container, directly intercepting liquid backflow before the gas enters the container, preventing liquid from contacting the internal structure of the air inlet channel 10a (such as the motor or cup chamber), and completely isolating the liquid from the gas path.

[0028] In one embodiment of the present invention, please refer to Figure 1 The outlet surface of the molecular membrane 30 is inclined towards the inlet channel 10a. This inclined outlet surface better guides the gas flow to the inlet channel 10a, reduces the residence time of gas on the surface of the molecular membrane 30, improves gas exchange efficiency, and helps to form a smoother airflow path, allowing air to enter the inlet channel 10a more quickly, thereby enhancing the pumping performance of the micro water pump. Simultaneously, the inclined outlet surface reduces liquid accumulation on the surface of the molecular membrane 30, lowers the risk of liquid backflow, helps keep the molecular membrane 30 dry and clean, and ensures its long-term stable operation. Furthermore, the inclined outlet surface reduces gas resistance on the surface of the molecular membrane 30, reducing the energy consumption of gas flow. This design helps improve the energy efficiency ratio of the micro water pump and reduce the operating cost of the equipment.

[0029] In one embodiment of the present invention, the housing 10 is provided with a fixing groove, and the inner wall of the fixing groove is provided with elastic protrusions. The molecular membrane 30 assembly includes the molecular membrane 30 and a fixing frame, and the molecular membrane 30 is fixedly disposed on the fixing frame. The fixing frame is engaged with the fixing groove, and the fixing frame is provided with a locking hole adapted to the elastic protrusion. The elastic protrusion is inserted into the locking hole. Specifically, the housing 10 has an inclined fixing groove along the extension direction of the motor output shaft, and its interior has elastic protrusions that can move in and out. Part of the structure of the elastic protrusion is inserted into the groove wall and connected to the groove wall through elastic elements such as springs and elastic rubber. Thus, when When the elastic protrusion is subjected to a force perpendicular to the extension direction of the fixed slot, the elastic protrusion is squeezed and retracted. In this embodiment, the end of the elastic protrusion is a ball head structure. After the fixed frame is inserted into the fixed slot, it exerts a pressure on the elastic protrusion. This pressure can be decomposed into a force along the deformation direction of the elastic element. Under the action of this force, the elastic protrusion retracts and moves to a certain position with the fixed frame. Then, the elastic protrusion aligns with the locking hole, and the elastic protrusion loses the constraint of the fixed frame and deforms back to its original shape, so that the elastic protrusion can be inserted into the locking hole. Similarly, by applying an upward tilting force to the fixed frame, the molecular membrane 30 component can be removed. In this way, the molecular membrane 30 component can be quickly replaced.

[0030] In one embodiment, the cross-section of the air intake channel 10a gradually decreases from the air intake end to the air outlet end. As the cross-sectional area of ​​the channel gradually decreases, according to the principles of fluid mechanics, the gas velocity will gradually increase under a constant flow rate. This allows outside air to be introduced into the air intake channel 10a more quickly and enter the sealed container through the molecular membrane 30, thereby enhancing the pumping performance of the micro water pump and improving the liquid pumping efficiency. At the same time, the gradually decreasing channel design helps to form a smoother airflow path, allowing air to enter the air intake channel 10a more quickly, reducing the residence time of gas in the channel, and further improving the gas exchange efficiency.

[0031] In another embodiment, the cross-section of the air intake channel 10a gradually increases from the air intake end to the air outlet end, and the cross-sectional area of ​​the gradually expanding channel gradually increases from the air intake end to the air outlet end. The gas flow rate decreases as the cross-sectional area increases. After the flow rate decreases, the gas kinetic energy is converted into pressure energy, realizing the balance from "high-speed air intake" to "stable pressure output". At the same time, the shear stress borne by the molecular membrane 30 is proportional to the square of the gas flow rate. The gradually expanding design reduces the flow rate on the membrane surface, directly reducing mechanical damage to the molecular membrane 30 and extending its service life. In addition, the reduction of gas flow rate can also reduce turbulence and eddies, thereby reducing noise decibels.

[0032] In one embodiment of the present invention, the air intake channel 10a and the liquid passage 10b are isolated. By isolating the air intake channel 10a and the liquid passage 10b, liquid can be effectively prevented from entering the air intake channel 10a through the liquid passage 10b, avoiding liquid leakage into the gas path, protecting components such as the motor and piston cup assembly in the gas path from liquid corrosion, and extending the service life of the equipment. At the same time, the isolation arrangement allows the air intake channel 10a and the liquid passage 10b to be independent, with gas and liquid flowing in their respective channels without interfering with each other, thereby optimizing the airflow and liquid flow paths, improving gas exchange efficiency and liquid extraction efficiency. The isolation arrangement can also reduce the resistance encountered by the gas during the flow process, allowing the gas to enter the sealed container more smoothly through the air intake channel 10a, improving gas exchange efficiency.

[0033] In one embodiment of the present invention, the outlet end of the air inlet channel 10a is provided with a second molecular membrane. The second molecular membrane can prevent the gas in the sealed container from flowing back to the air inlet channel 10a, avoid gas leakage or pollution caused by gas backflow, and further enhance the stability and reliability of the equipment.

[0034] The present invention also proposes a water pumping device, which includes the aforementioned micro water pump. The specific structure of the micro water pump is as described in the above embodiments. Since the water pumping device proposed in this invention adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0035] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A miniature water pump, characterized in that, The miniature water pump includes: A housing having an air inlet channel and a liquid outlet channel; A water pumping mechanism, comprising a drive motor, an eccentric component, a swing frame, and a leather cup assembly connected in sequence. The leather cup assembly includes a first leather cup and a second leather cup, both connected to the swing frame. The chamber of the first leather cup communicates with the air intake channel, and the chamber of the second leather cup communicates with the liquid passage channel. A molecular membrane assembly having a molecular membrane disposed in the air intake channel.

2. The micro water pump as described in claim 1, characterized in that, The molecular membrane is located on the side of the first cup near the air outlet end of the air inlet channel.

3. The micro water pump as described in claim 1, characterized in that, The outlet surface of the molecular membrane is inclined toward the inlet channel.

4. The micro water pump as described in claim 3, characterized in that, The housing is provided with a fixing slot, and the inner wall of the fixing slot is provided with elastic protrusions. The molecular membrane assembly includes the molecular membrane and a fixing frame. The molecular membrane is fixedly disposed on the fixing frame. The fixing frame is engaged in the fixing slot. The fixing frame is provided with a positioning hole that adapts to the elastic protrusions. The elastic protrusions are inserted into the positioning holes.

5. The micro water pump as described in any one of claims 1 to 4, characterized in that, The cross-section of the air intake channel gradually decreases from the air intake end to the air outlet end.

6. The micro water pump as described in any one of claims 1 to 4, characterized in that, The cross-section of the air intake channel gradually increases from the air intake end to the air outlet end.

7. The micro water pump as described in claim 1, characterized in that, The air intake channel and the liquid passage are isolated from each other.

8. The micro water pump as described in claim 1, characterized in that, The air outlet end of the air inlet channel is provided with a second molecular membrane.

9. A water pumping device, characterized in that, The pumping equipment includes a micro water pump as described in any one of claims 1 to 8.

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