阅读说明：本技术 微型流体泵 (Micro fluid pump ) 是由 王春莲 于 2018-06-14 设计创作，主要内容包括：本发明公开了一种微型流体泵,包括：泵体,泵体包括自上而下依次连接的上盖、阀座和囊座,上盖和阀座构设出流体进腔和流体出腔,上盖具有流体进口和流体出口,流体进口与流体进腔连通,流体出口与流体出腔连通,其中,阀座和囊座之间夹设有囊体,囊体构设出第一囊腔和第二囊腔,第一囊腔与流体进腔和流体出腔均连通,第二囊腔与流体进腔和流体出腔均不连通；驱动装置,驱动装置具有连杆,第一囊腔和第二囊腔的外壁设有穿过囊座向下延伸的连接柄,连接柄固定于连杆的两端。根据本发明实施例的微型流体泵,通过在阀座和囊座之间夹设具有第一囊腔和第二囊腔的囊体,第一囊腔和第二囊腔的连接柄分别与连杆的两端连接,保证微型流体泵工作平稳,稳定出水。(The invention discloses a micro fluid pump, comprising: the pump body comprises an upper cover, a valve seat and a bag seat which are sequentially connected from top to bottom, wherein the upper cover and the valve seat form a fluid inlet cavity and a fluid outlet cavity; the driving device is provided with a connecting rod, the outer walls of the first bag cavity and the second bag cavity are provided with connecting handles which penetrate through the bag seats and extend downwards, and the connecting handles are fixed at two ends of the connecting rod. According to the micro fluid pump provided by the embodiment of the invention, the capsule body with the first capsule cavity and the second capsule cavity is clamped between the valve seat and the capsule seat, and the connecting handles of the first capsule cavity and the second capsule cavity are respectively connected with the two ends of the connecting rod, so that the micro fluid pump is ensured to work stably and discharge water stably.)

1. A micro fluid pump, comprising:

the pump body comprises an upper cover, a valve seat and a bag seat which are sequentially connected from top to bottom, wherein the upper cover and the valve seat form a fluid inlet cavity and a fluid outlet cavity, the upper cover is provided with a fluid inlet and a fluid outlet, the fluid inlet is communicated with the fluid inlet cavity, the fluid outlet is communicated with the fluid outlet cavity, a bag body is clamped between the valve seat and the bag seat, the bag body forms a first bag cavity and a second bag cavity, the first bag cavity is communicated with the fluid inlet cavity and the fluid outlet cavity, and the second bag cavity is not communicated with the fluid inlet cavity and the fluid outlet cavity;

the driving device is provided with a connecting rod, the outer walls of the first bag cavity and the second bag cavity are provided with connecting handles which penetrate through the bag seats and extend downwards, and the connecting handles are fixed at two ends of the connecting rod.

2. The micro fluid pump of claim 1, wherein the fluid inlet is located on one side of the pump body and the fluid outlet is located on the other side of the pump body.

3. The micro fluid pump of claim 2, wherein a projected area of the fluid inlet chamber in a horizontal direction is smaller than a projected area of the fluid outlet chamber in the horizontal direction.

4. The micro fluid pump of claim 1, wherein the second bladder cavity is open to the atmosphere.

5. The micro fluid pump according to claim 4, wherein the valve seat is formed at a bottom thereof with air guide grooves respectively communicating with the second bladder chamber and the atmosphere.

6. The micro fluid pump according to claim 1, wherein a normally closed chamber is formed between the upper cover and the valve seat, and the normally closed chamber and the fluid inlet chamber are symmetrically disposed at left and right sides of the fluid outlet chamber.

7. The micro fluid pump according to claim 6, wherein the bottom of the upper cap is recessed upwards to form a first groove and a second groove and a third groove symmetrically disposed at two sides of the first groove, and the peripheries of the first groove, the second groove and the third groove are provided with sealing lines.

8. The micro fluid pump according to claim 1, wherein a first umbrella valve is provided at a bottom of the valve seat, a second umbrella valve is provided at a top of the valve seat, a first receiving hole corresponding to the first umbrella valve is provided at a bottom of the upper cover, and a second receiving hole corresponding to the second umbrella valve is provided at the capsule seat.

9. The micro fluid pump according to claim 8, wherein the bottom surface of the upper cap is provided with a crimp bead that is crimped to the top surface of the second umbrella valve.

10. The micro fluid pump according to claim 1, wherein the upper cover, the valve seat and the bladder seat are circumferentially provided with corresponding through holes, and screws are inserted through the through holes to lock the upper cover, the valve seat and the bladder seat.

Technical Field

The invention relates to the technical field of pumps, in particular to a micro fluid pump.

Background

For a micro fluid pump with small flow, even if the structure and the size of the micro fluid pump are designed according to high precision requirements, the stability of the outlet water flow cannot be ensured.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a micro fluid pump having a simple structure and a stable outlet flow rate.

A micro fluid pump according to an embodiment of the present invention includes: the pump body comprises an upper cover, a valve seat and a bag seat which are sequentially connected from top to bottom, wherein the upper cover and the valve seat form a fluid inlet cavity and a fluid outlet cavity, the upper cover is provided with a fluid inlet and a fluid outlet, the fluid inlet is communicated with the fluid inlet cavity, the fluid outlet is communicated with the fluid outlet cavity, a bag body is clamped between the valve seat and the bag seat, the bag body forms a first bag cavity and a second bag cavity, the first bag cavity is communicated with the fluid inlet cavity and the fluid outlet cavity, and the second bag cavity is not communicated with the fluid inlet cavity and the fluid outlet cavity; the driving device is provided with a connecting rod, the outer walls of the first bag cavity and the second bag cavity are provided with connecting handles which penetrate through the bag seats and extend downwards, and the connecting handles are fixed at two ends of the connecting rod.

According to the micro fluid pump provided by the embodiment of the invention, the capsule body with the first capsule cavity and the second capsule cavity is clamped between the valve seat and the capsule seat, and the connecting handles of the first capsule cavity and the second capsule cavity are respectively connected with the two ends of the connecting rod, so that the micro fluid pump is ensured to work stably and discharge water stably.

According to the micro fluid pump of one embodiment of the invention, the fluid inlet cavity is positioned on one side of the pump body, and the fluid outlet cavity is positioned on the other side of the pump body. The micro fluid pump is simple in molding, easy to produce and manufacture and capable of ensuring small flow rate.

In an alternative embodiment, the projected area of the fluid inlet chamber in the horizontal direction is smaller than the projected area of the fluid outlet chamber in the horizontal direction. The water inlet channel formed by the fluid inlet cavity and the first sac cavity can be ensured to have stronger self-absorption capacity, and the micro fluid pump can be ensured to reach the preset water outlet flow.

According to one embodiment of the micro fluid pump of the present invention, the second bladder cavity is open to the atmosphere. Thereby, it is ensured that the second capsule is normally compressed, preventing jamming.

In a specific example, the bottom of the valve seat is formed with air guide grooves which are respectively communicated with the second bag cavity and the atmosphere. Therefore, the micro fluid pump can work normally and stably.

According to the micro fluid pump of one embodiment of the invention, a normally closed cavity is formed between the upper cover and the valve seat, and the normally closed cavity and the fluid inlet cavity are symmetrically arranged at the left side and the right side of the fluid outlet cavity. Therefore, the pump body can be ensured to be more reasonable in structural design, the pump body can be machined and formed more conveniently, and the production cost is reduced.

In an optional embodiment, the bottom of the upper cover is recessed upwards to form a first groove, and a second groove and a third groove which are symmetrically arranged on two sides of the first groove, and sealing lines are arranged on the peripheries of the first groove, the second groove and the third groove. Therefore, the micro fluid pump is easy to produce and manufacture, and the sealing performance of the pump body is improved.

According to the micro fluid pump provided by the embodiment of the invention, the bottom of the valve seat is provided with the first umbrella-shaped valve, the top of the valve seat is provided with the second umbrella-shaped valve, the bottom of the upper cover is provided with the first accommodating hole corresponding to the first umbrella-shaped valve, and the capsule seat is provided with the second accommodating hole corresponding to the second umbrella-shaped valve. Therefore, the first umbrella-shaped valve and the second umbrella-shaped valve are guaranteed to be placed at reasonable avoiding positions, and interference of the convection channel is avoided.

In an alternative example, the bottom surface of the upper cover is provided with a crimping rib which is crimped on the top surface of the second umbrella-shaped valve. Therefore, the situation that the second umbrella-shaped valve is not tightly closed due to deformation is avoided.

According to the micro fluid pump of one embodiment of the invention, corresponding through holes are formed in the peripheries of the upper cover, the valve seat and the bag seat, and screws penetrate through the through holes to lock the upper cover, the valve seat and the bag seat. Further, the matching tightness of the upper cover, the valve seat and the bag seat is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a micro fluid pump according to some embodiments of the present invention;

FIG. 2 is a cross-sectional view of a micro fluid pump according to some embodiments of the present invention;

FIG. 3 is a schematic diagram of a partial structure of a micro fluid pump according to some embodiments of the invention.

Reference numerals:

a micro fluid pump 100;

a pump body 10;

an upper cover 11; a first groove 111; a second groove 112; a third groove 113; a seal line 114; a first receiving hole 115; crimping the convex rib 117; a fluid inlet 118; a fluid outlet 119;

a valve seat 12; a gas guide groove 121;

a bag holder 13; a second receiving hole 131;

a fluid inlet chamber 14;

a fluid outlet chamber 15;

a normally closed chamber 16;

a capsule body 20; a first capsule 21; a second bladder cavity 22; a connecting shank 23;

a first umbrella valve 30;

a second umbrella valve 40;

a through hole 50;

a connecting rod 60.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A micro fluid pump 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 3, and the micro fluid pump 100 may be applied to the fields of beauty equipment, medical equipment, home appliances, and the like.

As shown in fig. 1 and fig. 2, a micro fluid pump 100 according to an embodiment of the present invention includes a pump body 10 and a driving device, wherein the pump body 10 includes: an upper cover 11, a valve seat 12 and a capsule seat 13 which are connected in sequence from top to bottom. The upper cover 11, the valve seat 12 and the bag seat 13 are all plastic parts formed by integral injection molding.

The upper cover 11 and the valve seat 12 form a fluid inlet cavity 14 and a fluid outlet cavity 15, the upper cover 11 is provided with a fluid inlet 118 and a fluid outlet 119, the fluid inlet 118 is communicated with the fluid inlet cavity 14, and the fluid outlet 119 is communicated with the fluid outlet cavity 15, wherein a capsule body 20 is clamped between the valve seat 12 and the capsule seat 13, the capsule body 20 forms a first capsule cavity 21 and a second capsule cavity 22, the first capsule cavity 21 is communicated with the fluid inlet cavity 14 and the fluid outlet cavity 15, and the second capsule cavity 22 is not communicated with the fluid inlet cavity 14 and the fluid outlet cavity 15.

The driving device has a connecting rod 60, and the outer walls of the first and second bag cavities 21 and 22 are provided with connecting handles extending downward through the bag holder 13, and the connecting handles are fixed to both ends of the connecting rod 60. The connecting rod 60 is connected via a steel needle to an eccentric wheel, which is connected to the shaft of a drive motor. Therefore, the driving motor drives the eccentric wheel to rotate, so as to drive the connecting rod 60 to swing up and down, and further to lift or compress the first bag cavity 21 and the second bag cavity 22.

To better illustrate the micro fluid pump 100 of the embodiment of the present invention, the micro fluid pump 100 of the embodiment of the present invention is described below by taking water as an example, the operation of the micro fluid pump 100 is generally as follows, when the first bladder cavity 21 is pulled downward, the fluid inlet cavity 14 forms negative pressure, and water is sucked into the fluid inlet cavity 14 from the fluid inlet 118 and then into the first bladder cavity 21; when the first bladder cavity 21 is compressed upward, the water in the first bladder cavity 21 is sent out into the fluid outlet cavity 15 and then sent out through the fluid outlet 119.

Since the second bag chamber 22 and the first bag chamber 21 are fixed to both ends of the link 60 by the connecting bar 23, the movement process of the first bag chamber 21 and the second bag chamber 22 is reversed, and when the first bag chamber 21 is pulled up, the second bag chamber 22 is compressed; when the first bag cavity 21 is compressed, the second bag cavity 22 is pulled up, but the second bag cavity 22 is not communicated with the fluid inlet cavity 14 and the fluid outlet cavity 15, so that even if the second bag cavity 22 is pulled up and compressed, no fluid enters the second bag cavity 22, namely the second bag cavity 22 does not have the function of actually pumping the fluid, and the micro fluid pump realizes the work of a single bag cavity, thereby realizing the work of a small flow.

It can be understood that, because the two ends of the connecting rod 60 are respectively connected with the connecting handles 23 of the first bag cavity 21 and the second bag cavity 22, it can be ensured that the two ends of the connecting rod 60 are stressed relatively balanced when the micro fluid pump 100 operates, and the micro fluid pump 100 can stably output water.

Therefore, according to the micro fluid pump 100 of the embodiment of the invention, the capsule body 20 with the first capsule cavity 21 and the second capsule cavity 22 is clamped between the valve seat 12 and the capsule seat 13, and the connecting handles 23 of the first capsule cavity 21 and the second capsule cavity 22 are respectively connected with the two ends of the connecting rod 60, so that the micro fluid pump 100 is ensured to work stably and discharge water stably.

In some alternative embodiments, as shown in FIG. 2 in conjunction with FIG. 3, the fluid intake chamber 14 is located on one side of the pump body 10 (e.g., the left side in FIG. 2) and the fluid exhaust chamber 15 is located on the other side of the pump body 10 (e.g., the right side in FIG. 2). In other words, one side of the pump body 10 forms a water inlet channel, and the other side of the pump body 10 forms a water outlet channel, that is, the pump body 10 forms a single-cavity water inlet channel and a single-cavity water outlet channel. Thus, the micro fluid pump 100 is simple to form, easy to manufacture, and ensures a small flow rate of the micro fluid pump 100.

In a further alternative example, as shown in fig. 2, the projected area of the fluid inlet chamber 14 in the horizontal direction is smaller than the projected area of the fluid outlet chamber 15 in the horizontal direction, in other words, the unit flow area of the fluid inlet chamber 14 is smaller than the unit flow area of the fluid outlet chamber 15. The water inlet channel formed by the fluid inlet chamber 14 and the first bladder chamber 21 can be ensured to have strong self-priming capability, and the micro fluid pump 100 can be ensured to reach the preset water outlet flow.

In other alternative embodiments, second bladder cavity 22 is vented to atmosphere. In this way, when the second bladder 22 is compressed, the gas in the second bladder 22 can be compressed to the external environment, thereby preventing the second bladder 22 from being compressed normally when the micro fluid pump 100 is operated.

In one embodiment, the bottom of the valve seat 12 is formed with an air guide groove 121, and the air guide groove 121 is respectively communicated with the second bag cavity 22 and the atmosphere. That is, when the second bladder cavity 22 is lifted and compressed, the gas flows between the second bladder cavity 22 and the atmosphere through the gas guide groove 121, so as to ensure the normal and stable operation of the micro fluid pump 100.

In still other embodiments of the present invention, a normally closed chamber 16 is formed between the upper cover 11 and the valve seat 12, and the normally closed chamber 16 and the fluid inlet chamber 14 are symmetrically disposed on the left and right sides of the fluid outlet chamber 15. As shown in fig. 2 and 3, the fluid inlet chamber 14 and the normally closed chamber 16 are located on the left side and the right side of the pump body 10, respectively, and the fluid outlet chamber 15 is located at a middle position. Therefore, the pump body 10 can be guaranteed to be more reasonable in structural design, the pump body 10 can be machined and formed more conveniently, and production cost is reduced.

In a specific example, as shown in fig. 3, a first groove 111, a second groove 112 and a third groove 113 symmetrically disposed at two sides of the first groove 111 are formed at the bottom of the upper cover 11 in an upward concave manner, and a sealing line 114 is formed around the first groove 111, the second groove 112 and the grooves. Thus, when the upper cover 11 and the valve seat 12 are attached together, the sealing line 114 is melted by wave welding, so that the fluid inlet chamber 14, the fluid outlet chamber 15 and the normally closed chamber 16 which are independent and separated from each other are formed between the upper cover 11 and the valve seat 12.

In still other embodiments of the present invention, as shown in fig. 1 and 2, a first umbrella-shaped valve 30 is disposed at the bottom of the valve seat 12, a second umbrella-shaped valve 40 is disposed at the top of the valve seat 12, a first receiving hole 115 corresponding to the first umbrella-shaped valve 30 is disposed at the bottom of the upper cover 11, and a second receiving hole 131 corresponding to the second umbrella-shaped valve 40 is disposed on the capsule seat 13. That is, the stem penetrating valve seat 12 of the first umbrella valve 30 can be partially accommodated in the first accommodating hole 115, and the stem penetrating valve seat 12 of the second umbrella valve 40 is partially accommodated in the second accommodating hole 131, so as to prevent the stem from having enough accommodating space to interfere with the normal flow of the fluid in the fluid inlet chamber 14 or the first bladder chamber 21, thereby further ensuring a relatively stable outlet flow rate of each micro fluid pump 100.

In a further alternative embodiment, the bottom surface of the upper cap 11 is provided with a crimping rib 117, and the crimping rib 117 is crimped on the top surface of the second umbrella-type valve 40. Thus, when the upper cover 11 and the valve seat 12 are assembled together, the pressing convex rib 117 can stop against the top surface of the second umbrella-shaped valve 40, so as to prevent the problem that the second umbrella-shaped valve 40 is not tightly closed due to deformation under long-term flowing water impact, and ensure normal water inlet and outlet of the micro fluid pump 100.

In one embodiment of the present invention, as shown in fig. 1 and fig. 2, the upper cover 11, the valve seat 12 and the bag seat 13 are provided with corresponding through holes 50 in the circumferential direction, and screws are inserted through the through holes 50 to lock the upper cover 11, the valve seat 12 and the bag seat 13. That is, when the micro fluid pump 100 is assembled, the first umbrella-shaped valve 30 and the second umbrella-shaped valve 40 may be respectively installed on the valve seat 12, then the capsule 20 is clamped between the valve seat 12 and the capsule seat 13, then the fluid inlet cavity 14, the fluid outlet cavity 15 and the normally closed cavity 16 are sealed by wave welding, the upper cover 11, the valve seat 12 and the capsule seat 13 are further locked by screws, thereby completing the assembly of the pump body 10, and finally the pump body 10 and the driving device are connected to form a whole. It should be understood that the above description is intended to be illustrative only, and not limiting.

Other constructions, such as drive motors, etc., and operations of the micro fluid pump 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.