CN217898094U

CN217898094U - Electromagnetic pump and device using same

Info

Publication number: CN217898094U
Application number: CN202123115319.3U
Authority: CN
Inventors: 王旭霄
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-11-25
Anticipated expiration: 2031-12-13

Abstract

The utility model relates to an electromagnetic pump and use device of this pump, including the pump body, set up in the inside magnetic core of the pump body, set up in the outer coil of pump body and the current commutation circuit of coil. Above-mentioned electromagnetic pump's overall structure has only included the pump body, magnetic core, coil and circuit, simple structure, low in production cost, and the stability of the pump body of integration is more excellent for traditional mosaic structure waterproof performance, and stability is higher, and further, owing to adopted the current commutation circuit, has reduced the spring in the traditional architecture, has simplified the assembly flow in the production, has promoted the stability of product.

Description

Electromagnetic pump and device using same

Technical Field

The utility model belongs to the technical field of the electromagnetic pump technique and specifically relates to an electromagnetic pump and use device of this pump.

Background

The Chinese patent application with the application number of 202110915019.9 discloses an electromagnetic pump in a magnetically-driven tooth flushing device, and particularly discloses the following parts in 31 st to 34 th sections of the specification: "the magnetic member 60 magnetically coupled to the electromagnetic coil 42 is disposed in the cavity 411", and "the magnetic member 60 includes a magnet 61 and a return spring 62, the magnet 61 is fixedly coupled to the piston 43, and one end of the return spring 62 is positioned in the cavity 411", because there is a volume requirement in some devices of the electromagnetic pump, such as a dental irrigator, the volume of the electromagnetic pump is often very small, so the assembly of the electromagnetic pump requiring the piston return through the spring is relatively complicated, and meanwhile, the reciprocating frequency of the piston of the electromagnetic pump is relatively high, the performance of the spring is weakened after long-term use, the piston return is incomplete, the intuitive reaction in product use is that the water pressure is reduced, the flushing requirement cannot be met, further, the spring is soaked in water for a long time, and the possibility of corrosion also exists, and in conclusion, the existing electromagnetic pump has the following problems: 1. the structure is relatively complex, the number of parts is large, and the assembly is not easy; 2. the stability is not enough, and the elastic part is easy to damage.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for an electromagnetic pump and an apparatus using the same that solves at least one of the problems described above.

An electromagnetic pump comprises a pump body, a magnetic core arranged in the pump body, a coil arranged outside the pump body and a current reversing circuit electrically connected with the coil.

As a further aspect of the present invention: the pump body comprises a first check valve, the magnetic core comprises a second check valve, and the first check valve and the second check valve allow the fluid to pass through in the same direction.

As a further aspect of the present invention: and a closed volume cavity is formed between the inner cavity of the pump body and the magnetic core, the inlet of the volume cavity is the second check valve, and the outlet of the volume cavity is the first check valve.

As a further aspect of the present invention: the first check valve and the second check valve are in one of a diaphragm type, a mushroom type and a duckbill type.

As a further aspect of the present invention: the current reversing circuit is an H-bridge driving circuit.

As a further aspect of the present invention: the coil is directly electrically connected with an alternating current power supply.

As a further aspect of the present invention: the current commutation circuit includes a pulse frequency control circuit.

The utility model also provides a device, including any of the aforesaid electromagnetic pump.

Above-mentioned electromagnetic pump's overall structure has only included the pump body, magnetic core, coil and circuit, simple structure, low in production cost, and the stability of the pump body of integration is more excellent for traditional mosaic structure waterproof performance, and stability is higher, and further, owing to adopted the current commutation circuit, has reduced the spring in the traditional architecture, has simplified the assembly flow in the production, has promoted the stability of product.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is an assembly view of a first embodiment of the present invention;

fig. 3 is a circuit schematic of a current commutation circuit according to an embodiment of the present invention;

fig. 4 is an assembly view of the second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following description, in conjunction with the accompanying drawings and embodiments, will provide further detailed description of an electromagnetic pump and a device using the same. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "central," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application will be understood by those of ordinary skill in the art from the specific context.

First embodiment, as shown in fig. 1-2, an electromagnetic pump includes a pump body 100, a magnetic core 200 disposed inside the pump body 100, a coil 300 disposed outside the pump body 100, and a current commutation circuit of the coil 300. In this embodiment, the ac power source is connected to the coil 300 through the current commutation circuit, the coil 300 is equivalent to an electromagnet whose magnetic pole changes with the direction of the current pulse, and the magnetic core 200 in the pump body 100 reciprocates under the action of the magnetic field, and it is easy to understand that the reciprocating magnetic core 200 is a piston of the electromagnetic pump, and the reciprocating process is the water sucking and pumping process.

Further, the pump body 100 is provided with a first check valve 110, the magnetic core 200 is provided with a second check valve 210, and the first check valve 110 and the second check valve 210 allow the fluid to pass through in the same direction. Specifically, in the present embodiment, the pump body 100 is generally tubular, preferably circular, the first check valve 110 is disposed at one end of the pump body 100 and seals the port, and the second check valve 210 is disposed at an end of the magnetic core 200 close to the first check valve 110, it can be understood that a through hole is disposed in the axial direction of the magnetic core 200, the through hole is sealed by the second check valve 210, and the fluid passing directions of the two check valves are the same, that is, the water spraying direction and the water absorbing direction are the same, and the tightness of the two check valves under the action of water pressure is better.

Furthermore, a closed volume 400 is formed between the inner cavity of the pump body 100 and the magnetic core 200, an inlet of the volume 400 is the second check valve 210, and an outlet is the first check valve 110. In this embodiment, the pump body 100 and the magnetic core 200 are cylindrical, and both are through size fit, and it is easier to process, in order to guarantee the seal nature of volume chamber 400, also can install a plurality of sealing washer on the magnetic core 200 again to realize the effect of leak protection, decompression proof. Further, in conjunction with the foregoing operation principle, it is easy to know that when the magnetic core 200 is far away from the first check valve 110, the volume of the volume chamber 400 is increased, the internal pressure thereof is decreased, the second check valve 210 is opened, the first check valve 110 is closed, the fluid enters the volume chamber 400 from the second check valve 210, when the magnetic core 200 is close to the first check valve 110, the volume of the volume chamber 400 is decreased, the internal pressure is increased, the first check valve 110 is opened, the second check valve 210 is closed, and the fluid is pumped out.

Further, the first check valve 110 and the second check valve 210 are one of a diaphragm type, a mushroom type, and a duckbill type. In this embodiment, the form of the check valve may be different, and it is only different in the installation manner.

Furthermore, as shown in fig. 3, the current commutation circuit is an H-bridge driving circuit, which includes a full bridge and a half bridge, specifically, taking the full bridge circuit as an example, the current commutation circuit includes 4 MOS transistors, where the 4 MOS transistors and the coil 300 form an H-shaped circuit, where the MOS transistors are located at four corners of the H-shape, the coil 300 is located in the middle of the H-shape, the conduction directions of the MOS transistors located at diagonal positions are the same, the conduction directions of the MOS transistors located at the same side are opposite, and the driving mode of the coil is driven by an H-bridge square wave or an H-bridge sine wave. The MOS tube can also be a triode, a motor driving chip or other components with the same functions and used for generating pulse square waves and pulse sine waves. Further, the device can be directly driven by alternating current, but the method is not suitable for devices similar to tooth irrigators, and products such as tooth irrigators which have the mentioned requirements are preferably realized by using a built-in direct current battery and a current reversing circuit.

Furthermore, the current reversing circuit comprises a pulse frequency control circuit which can control the frequency of the pulse square wave and the pulse sine wave, and the specific function of the current reversing circuit on the product is to change the reciprocating movement frequency of the magnetic core of the electromagnetic pump so as to adjust the water pressure and the water pumping frequency of the tooth flushing device.

Second embodiment, unlike the first embodiment, as shown in fig. 4, the pump body 100 and the magnetic core 200 each include an end cap 500, and the first check valve 110 and the second check valve 210 are respectively disposed on the corresponding end caps, so that the split design makes the processing of the pump body 100 and the magnetic core 200 simpler, and the first check valve 110 and the second check valve 210 are also easier to install.

In the third embodiment, unlike the first two embodiments, the two ends of the outer shell of the pump body 100 are provided with flange-like protrusions, and as the support of the coil 300 of the first two embodiments, the shape of the axial cross section is H-shaped, the enameled wire is directly wound on the outer shell of the pump body 100, and this solution can be understood as integrating the coil 300 directly on the pump body 100.

The utility model also provides a device, including foretell electromagnetic pump, the device includes such as tooth ware, coffee machine, steam iron etc..

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.

Claims

1. An electromagnetic pump, characterized by: the electromagnetic pump comprises a pump body (100), a magnetic core (200) arranged in the pump body (100), a coil (300) arranged outside the pump body (100) and a current reversing circuit electrically connected with the coil (300);

the pump body (100) comprises a first non-return valve (110), the magnetic core (200) comprises a second non-return valve (210), and the directions of the first non-return valve (110) and the second non-return valve (210) allowing the fluid to pass through are the same;

the pump body (100) and the magnetic core (200) respectively comprise an end cover (500), and the first check valve (110) and the second check valve (210) are respectively arranged on the corresponding end covers.

2. The electromagnetic pump of claim 1, wherein: a closed volume cavity (400) is formed between the inner cavity of the pump body (100) and the magnetic core (200), the second check valve (210) is arranged at the inlet of the volume cavity (400), and the first check valve (110) is arranged at the outlet of the volume cavity.

3. The electromagnetic pump of claim 1 or 2, wherein: the first check valve (110) and the second check valve (210) are one of a diaphragm type, a mushroom type, and a duckbill type.

4. The electromagnetic pump of claim 1, wherein: the current reversing circuit is an H-bridge driving circuit.

5. The electromagnetic pump of claim 1, wherein: the coil (300) is directly electrically connected to an alternating current power source.

6. The electromagnetic pump of claim 1, wherein: the current commutation circuit includes a pulse frequency control circuit.

7. An apparatus, characterized by: comprising an electromagnetic pump as claimed in any one of claims 1-5.