CN218816868U - Noise reduction pump head and noise reduction fluid pump - Google Patents

Abstract

The application relates to a pump head of making an uproar falls includes: the pump comprises a pump functional assembly, a conveying assembly and a pump cover, wherein the pump functional assembly comprises a first pump functional part and a second pump functional part and is used for driving fluid to move; the delivery assembly has a first input flow path in communication with the first pump function and a second input flow path in communication with the second pump function for defining a movement trajectory of a forming fluid; the pump cover is provided with an output port, a first buffer cavity and a second buffer cavity, the first buffer cavity is communicated with the first input flow path and the output port, the second buffer cavity is communicated with the second input flow path and the output port, the first buffer cavity and the second buffer cavity are respectively arranged on two opposite sides of the output port, and the positions of the first buffer cavity and the second buffer cavity enable fluid in the first buffer cavity and fluid in the first buffer cavity to flow to the output port from opposite directions so as to reduce noise generated by the inner wall of the fluid friction output port.

Description

Noise reduction pump head and noise reduction fluid pump

Technical Field

The application relates to the technical field of pump valves, in particular to a noise reduction pump head and a noise reduction fluid pump.

Background

With the development and application of fluid pump technology, the requirement for reducing noise is higher and higher, for example, a sphygmomanometer is used, an air pump of the sphygmomanometer is used for pumping air flow with certain pressure to a specified closed space within a certain time, noise is generated during air flow operation, and the noise is large so that a person who tests the blood pressure feels uncomfortable.

The existing micro air pump mainly reduces the noise by reducing the rotating speed of the motor, which can cause the performance stability of the pump to be influenced, because the reduction of the rotating speed of the motor is the reduction of the capability of the motor, the air flow can not reach the specification in the air pumping process.

Therefore, in the application of the micro fluid pump, the low noise is achieved when the air pump is used for pumping air, and is an important index which is not easy to achieve when the air pump is used, so the low noise is one of the main technical problems of the current micro air pump.

Disclosure of Invention

Accordingly, it is desirable to provide a noise reduction pump head and a noise reduction fluid pump, which can reduce noise generated during operation of the micro fluid pump.

A noise reducing pump head, comprising: the pump comprises a pump functional assembly, a conveying assembly and a pump cover, wherein the pump functional assembly comprises a first pump functional part and a second pump functional part and is used for driving fluid to move; the delivery assembly has a first input flow path in communication with the first pump function and a second input flow path in communication with the second pump function for defining a movement trajectory of a forming fluid; the pump cover is provided with an output port, a first buffer cavity and a second buffer cavity, the first buffer cavity is communicated with the first input flow path and the output port, the second buffer cavity is communicated with the second input flow path and the output port, the first buffer cavity and the second buffer cavity are respectively arranged on two opposite sides of the output port, and the positions of the first buffer cavity and the second buffer cavity enable fluid in the first buffer cavity and fluid in the first buffer cavity to flow to the output port from opposite directions so as to reduce noise generated by the inner wall of the fluid friction output port.

By adopting the technical scheme, the first pump functional part and the second pump functional part work to pump fluid to the first buffer cavity and the second buffer cavity in the pump cover through the first input flow path and the second output flow path respectively, and two sides of the first buffer cavity and the second buffer cavity opposite to the output port are arranged respectively, so that the fluid in the first buffer cavity and the fluid in the second buffer cavity flow to the output port on the pump cover from opposite directions, the two fluids collide with each other in opposite movement and lose momentum, the movement speed of the fluid is reduced, the friction force between the fluid and the inner wall of the output port is reduced when the fluid flows out of the output port, and the noise generated thereby is reduced.

In one embodiment, a plurality of buffer grids are arranged in the first buffer cavity.

Through adopting above-mentioned technical scheme, the buffering check are used for forming extra buffering space for fluid further flows into the buffering check and carries out buffering speed reduction after flowing to first cushion chamber.

In one embodiment, a plurality of the buffer grid arrays are disposed in the first buffer cavity.

Through adopting above-mentioned technical scheme, arrange according to equal interval and direction between a plurality of buffering check for fluid gets into a plurality of buffering check in proper order, cushions in every buffering check with equal gradient ground, in order to improve buffering effect.

In one embodiment, the buffer grid is provided with a cambered surface-shaped guide wall.

Through adopting above-mentioned technical scheme, the guide wall makes fluid when getting into and flowing out the buffering check, and the fluid moves along the guide wall of cambered surface to prevent that original fluid in the buffering check from being unable to move in the buffering check by the fluid pressure that gets into behind, avoid the fluid in the buffering check to lose mobility.

In one embodiment, the output port is arranged at the center of the pump cover, and the first buffer cavity and the second buffer cavity are arranged around the output port in a central symmetry manner.

Through adopting above-mentioned technical scheme, first cushion chamber and second cushion chamber can have the same specification and size in the pump cover, have equal buffering effect. And the space in the pump cover can be effectively utilized.

In one embodiment, a partition is arranged between the first buffer cavity and the second buffer cavity, and the partition defines a moving track of the gas flowing to the output port.

By adopting the technical scheme, the movement track of the gas is formed by separating and defining, so that the gas flowing out of the first buffer cavity and the second buffer cavity just moves oppositely, the gas can collide with each other in the opposite movement to lose momentum, and the noise reduction effect is achieved.

In one embodiment, the delivery assembly comprises a valve seat, a one-way valve is arranged on the valve seat, and orthographic projections of the first buffer cavity and the second buffer cavity on the valve seat completely cover the one-way valve.

Through adopting above-mentioned technical scheme, first cushion chamber and second cushion chamber are greater than the projected area of check valve to make first cushion chamber and second cushion chamber can receive the fluid of transmission when the check valve is opened, and improve the transport efficiency of fluid.

The application still provides a fluid pump of making an uproar falls, includes as above the pump head and the actuating mechanism of making an uproar fall, the actuating mechanism transmission connect in pump function piece is in order to drive pump function piece work.

Through adopting above-mentioned technical scheme, this fluid pump of making an uproar falls through using the pump head of making an uproar, can effectively reduce the noise that the fluid pump during operation produced to obtain the better index of making an uproar of falling.

To sum up, the pump head and the fluid pump of making an uproar fall of making an uproar of this application have following effective technological effect:

1. by adopting the technical scheme, the first pump functional part and the second pump functional part work to pump fluid to the first buffer cavity and the second buffer cavity in the pump cover through the first input flow path and the second output flow path respectively, and two sides of the first buffer cavity and the second buffer cavity opposite to the output port are arranged respectively, so that the fluid in the first buffer cavity and the fluid in the second buffer cavity flow to the output port on the pump cover from opposite directions, the two fluids collide with each other in opposite movement and lose momentum, the movement speed of the fluid is reduced, the friction force between the fluid and the inner wall of the output port is reduced when the fluid flows out of the output port, and the noise generated thereby is reduced.

2. The buffering check is arranged in the buffering cavity and used for forming an extra buffering space, so that fluid flows into the buffering check to be buffered and decelerated after flowing to the first buffering cavity.

3. The guide wall enables the fluid to move along the guide wall of the cambered surface when the fluid enters and flows out of the buffer lattice, so that the original fluid in the buffer lattice is prevented from being pressed by the fluid entering later in the buffer lattice and being incapable of moving, and the fluid in the buffer lattice is prevented from losing fluidity

Drawings

FIG. 1 is an exploded view of a noise reducing fluid pump in a first perspective of an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a noise reducing fluid pump of an embodiment of the present application from a second perspective;

fig. 3 is a schematic structural diagram of a third viewing angle of the pump cover in an embodiment of the present application.

Description of reference numerals:

100. a pump function assembly; 110. a first pump function; 111. a first bell cup; 120. a second pump function; 121. a second bell cup; 130. an eccentric wheel; 131. a steel shaft; 132. a crank; 200. a delivery assembly; 210. a diaphragm seat; 220. a valve seat; 221. a first check valve; 222. a second one-way valve; 221A, a valve cap; 221B, an umbrella handle; 223. a through hole; 300. a pump cover; 310. an output port; 311. separating; 320. a first buffer chamber; 321. a buffer grid; 321A, a guide wall; 330. a second buffer chamber; 400. a drive mechanism; 410. an electric motor; 411. a motor output shaft.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 and fig. 2 in combination, fig. 1 is an exploded view of a noise reduction fluid pump in an embodiment of the present disclosure, and fig. 2 is a cross-sectional view of a noise reduction fluid pump in a second view. The noise reduction fluid pump provided by the embodiment of the application comprises a pump functional assembly 100, a conveying assembly 200 and a pump cover 300. The pump functional assembly 100 is used for driving fluid to move, the delivery assembly 200 is used for defining a fluid moving track, and the pump cover 300 covers one side of the delivery assembly 200. The pump cover 300 has an output port 310, a first buffer chamber 320 and a second buffer chamber 330, and the first buffer chamber 320 and the second buffer chamber 330 are respectively disposed at two opposite sides of the output port 310, so that when fluid flows from the first buffer chamber 320 and the second buffer chamber 330 to the output port 310, the fluid moves in opposite directions to impact each other and lose momentum, thereby reducing the moving speed of the fluid flowing in the output port 310 and reducing noise generated by the fluid rubbing against the inner wall of the output port 310.

The noise reduction fluid pump has a driving mechanism 400, and the driving mechanism 400 is drivingly connected to the pump function assembly 100 to drive the pump function member to operate. Specifically, the driving mechanism 400 is an electric motor 410, and when the electric motor 410 is powered on, the motor output shaft 411 rotates to drive the pump function assembly 100 to work.

The pump function assembly 100 includes a first pump function 110, a second pump function 120 for driving fluid movement. Specifically, the first pump function 110 and the second pump function 120 are two bell cups made of an elastic material, and compress and expand a space inside the bell cups by reciprocating operation to force gas inside the bell cups to flow.

In this embodiment, the eccentric wheel 130 is connected to the motor output shaft 411, a steel shaft 131 is disposed on the eccentric end of the eccentric wheel 130, a curved rod is connected to one end of the steel shaft 131, which is relatively far away from the eccentric wheel 130, the center of the curved rod is fixedly connected to the steel shaft 131, and two ends of the curved rod are respectively connected to the first bell cup 111 and the second bell cup 121. When the motor output shaft 411 rotates, the eccentric wheel 130 is driven to rotate together, and one end of the steel shaft 131 connected with the eccentric wheel 130 rotates along with the eccentric wheel 130 to perform circular motion by taking the axis of the motor output shaft 411 as the center of a circle. One end of the steel shaft 131 far away from the eccentric wheel 130 is collinear with the axis of the motor output shaft 411, so that the steel shaft performs autorotation motion, two ends of the crank 132 are driven to perform reciprocating motion with limited amplitude in the axis direction, and the bell cup is driven to extrude or expand to realize the pump function.

It should be noted that the first bell cup 111 and the second bell cup 121 are respectively located at two ends of the crank 132, and when the first bell cup 111 located at the first end of the crank 132 is in the squeezed state, the second bell cup 121 located at the other end of the crank 132 is correspondingly in the expanded state. Therefore, the first cup 111 and the second cup 121 alternately enter the suction state and the discharge state, so that the function of continuously pumping the fluid by the fluid pump is realized.

The pump function assembly 100 is disposed in the diaphragm seat 210, and the diaphragm seat 210 is used for fixing the pump function assembly 100. Specifically, the first and second cups 111 and 121 are both fixedly disposed in the diaphragm seat 210, and one side of the diaphragm is connected to the first and second cups 111 and 121 to fix one end of the cups, so that the other end of the cups performs reciprocating motion of squeezing and expanding and changes the space in the cups.

The valve seat 220 is disposed on a side of the diaphragm seat 210 relatively far from the driving motor, the valve seat 220 is correspondingly provided with a first check valve 221 and a second check valve 222, the first check valve 221 is used for opening and closing a first input flow path corresponding to the first bell cup 111, and the second check valve 222 is used for opening and closing a second input flow path corresponding to the second bell cup 121.

Specifically, in the present embodiment, two through holes 223 are disposed on the valve seat 220, and the first check valve 221 and the second check valve 222 are umbrella-shaped valves and disposed in the two through holes 223 respectively. The valve cap 221A of the umbrella valve completely covers the through hole 223, and the handle is abutted to the inside of the bell cup. When the bell cup is compressed, the end of the bell cup connected to the crank 132 moves in a direction toward the valve seat 220, causing the stem 221B to move upward, forcing the valve cap 221A out of engagement with the through-hole 223, and allowing fluid to flow from within the bell cup through the gap between the through-hole 223 and the valve cap 221A. When the bell cup is expanded, one end of the bell cup connected to the crank 132 moves in a direction away from the valve seat 220, and the umbrella handle 221B is driven to move downwards, so that the valve cap 221A is tightly abutted on the through hole 223, and fluid cannot pass through the check valve from the bell cup, so that the flow of the fluid 311 is blocked.

It should be noted that, since a person skilled in the art can realize the technical solution of the above-mentioned partial structure according to the common general knowledge in the art, the detailed structure and the operation principle of the above-mentioned structure are not further described, and the person skilled in the art can also make an adjustment to the above-mentioned partial structure in accordance with the actual requirement.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a third viewing angle of the pump cover in an embodiment of the present application. The pump cover 300 is disposed on one side of the valve seat 220 away from the diaphragm seat 210, and the pump cover 300 has a first buffer cavity 320, a second buffer cavity 330, and an output port 310 therein, wherein the output port 310 is used for outputting fluid to the outside, and the first buffer cavity 320 and the second buffer cavity 330 are used for buffering fluid to reduce the flow rate of the fluid.

Specifically, the output port 310 is disposed through the pump cover 300, the first buffer chamber 320 and the second buffer chamber 330 are disposed in a side of the pump cover 300 relatively close to the valve seat 220, the first buffer chamber 320 is respectively communicated with the output port 310 and the first input flow path, and the second buffer chamber 330 is respectively communicated with the output port 310 and the second input flow path. The first buffer chamber 320 and the second buffer chamber 330 are respectively disposed at opposite sides of the output port 310, so that the fluid flowing from the first buffer chamber 320 to the output port 310 is opposite to the fluid flowing from the second buffer chamber 330 to the output port 310 and collides with each other at the output port 310, thereby reducing the moving speed by losing momentum, and reducing noise generated by friction between the fluid and the inner wall of the output port 310.

Specifically, in this embodiment, the output port 310 is disposed at the center of the pump cover 300, and the first buffer cavity 320 and the second buffer cavity 330 are disposed in a central symmetry manner around the output port 310. The first buffer chamber 320 and the second buffer chamber 330 have the same size and output fluid to the output port 310 from symmetrical positions, so that the fluids in two directions meeting at the output port 310 output fluid having similar momentum at the same time, thereby improving noise reduction effect.

Meanwhile, the first buffer cavity 320 and the second buffer cavity 330 symmetrically arranged around the center can occupy more positions in the pump cover 300, so that the buffer space of the gas is increased, and the buffer effect of the gas is improved.

A partition 311 is disposed between the first buffer chamber 320 and the second buffer chamber 330, and is used for partitioning the first buffer chamber 320 and the second buffer chamber 330. The partitions 311 are disposed on both sides of the output port 310, thereby defining a moving track of the gas flowing from the first buffer chamber 320 and the second buffer chamber 330 to the output port 310. When gas flows from the first buffer chamber 320, the gas in the direction toward the output port 310 can flow from the gap between the partitions 311 to the output port 310, and the rest of the gas in the flow direction meets the partitions 311 and is blocked, thereby defining the moving directions of the fluid in the first buffer chamber 320 and the second buffer chamber 330.

In other embodiments, the output port 310 extends toward a side relatively away from the valve seat 220 to form an extension protruding from the pump cap 300 to circumscribe a working chamber, such as a sphygmomanometer.

The first buffer chamber 320 is correspondingly disposed at an upper side of the first check valve 221. Specifically, the orthographic projection of the first buffer cavity 320 on the valve seat 220 completely covers the one-way valve, so that when the umbrella-shaped first one-way valve 221 is opened, the fluid flows from a gap below the valve cap 221A to the outside and directly enters the first buffer cavity 320, the fluid is prevented from flowing to the outside, or the fluid meets the inner wall of the first buffer cavity 320 when flowing out from below the valve cap 221A and is partially blocked, and the communication function of the one-way valve is influenced.

The first buffer cavity 320 is further provided with a plurality of buffer lattices 321, and the buffer lattices 321 are further recessed into the pump cover 300 relative to the buffer cavity to form an additional buffer space, so that fluid can further flow into the buffer lattices 321 for buffering and decelerating after flowing into the first buffer cavity 320, and the buffering and decelerating functions of the first buffer cavity 320 are improved.

Specifically, in the present embodiment, a plurality of buffer compartments 321 are provided, and the plurality of buffer compartments 321 are disposed in the first buffer cavity 320 in an array. The buffer lattices 321 are sequentially arranged at equal intervals along the same direction, so that after the liquid flows to the first buffer cavity 320 from the first input flow path, the liquid sequentially enters the plurality of buffer lattices 321 along the flow direction to perform equal-gradient buffer deceleration, and the buffer deceleration effect of the buffer lattices 321 is further improved.

The side wall of the buffer compartment 321 is a guide wall 321A with a cambered surface for guiding the fluid to flow along the guide wall 321A. By setting the guide wall 321A to be a curved surface, it is possible to prevent, in the right-angled buffer lattice 321, a large amount of fluid from flowing into the buffer lattice 321 since the flow rate of the fluid output from the check valve to the first buffer chamber 320 is too large and the fluid in the buffer lattice 321 has not yet come out. At this time, the original fluid occupies the space in the buffer compartment 321, and the fluid that flows in later cannot enter the buffer compartment 321, and then directly flows toward the output port 310, so that the original fluid is further pressed in the buffer compartment 321, and the fluid in the buffer compartment 321 cannot flow out, and the subsequent fluid directly flows toward the output port 310 without passing through the buffer compartment 321, and further the buffer compartment 321 loses its own buffering effect.

Through the guiding wall 321A with the arc surface, even if the flow rate of the fluid output from the check valve to the first buffer chamber 320 is too large, and the buffer lattice 321 cannot accommodate all the newly introduced fluid, the original fluid is still not completely sealed and can flow out through the guiding wall 321A with the arc surface. When the fluid in the buffer compartment 321 can flow out, the space in the buffer compartment 321 is emptied again to accommodate buffering the newly introduced fluid, so that part of the fluid can still pass through the buffer compartment 321 for deceleration buffering, and the buffer compartment 321 can still play a role of buffering and decelerating when the flow rate is large.

It is understood that the second buffer chamber 330 has the same structure as the first buffer chamber 320, and the buffer lattice 321 is correspondingly disposed in the second buffer chamber 330, and those skilled in the art can understand the specific structural configuration and operation principle of the second buffer chamber 330 through the description of the first buffer chamber 320.

The working principle of the noise reduction fluid pump of the application is as follows: the fluid pump has a first input flow path and a second input flow path that are independent of each other, a first buffer chamber 320 and a second buffer chamber 330 are correspondingly disposed in the pump cover 300 for buffering, and a buffer lattice 321 is disposed in the buffer chamber for further improving the buffering effect. The buffered fluids of the first and second input flow paths collide in a direction approaching each other to reduce the flow velocity of the fluid, and the decelerated fluid is output from the output port 310. Due to the fact that the speed of the fluid in the output port 310 is reduced, friction between the fluid and the inner wall of the output port 310 is reduced, noise generated by the friction is reduced, and the fluid pump has a good noise reduction performance index.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (8)

1. A noise reducing pump head, comprising:

a pump function assembly (100) comprising a first pump function (110) and a second pump function (120) for driving fluid movement;

a delivery assembly (200) having a first input flow path in communication with the first pump function (110) and a second input flow path in communication with the second pump function (120) for defining a movement trajectory of a formed fluid;

the pump cover (300) is provided with an output port (310), a first buffer cavity (320) and a second buffer cavity (330), the first buffer cavity (320) is communicated with the first input flow path and the output port (310), the second buffer cavity (330) is communicated with the second input flow path and the output port (310), the first buffer cavity (320) and the second buffer cavity (330) are respectively arranged on two opposite sides of the output port (310), and the positions of the first buffer cavity (320) and the second buffer cavity (330) enable fluid in the first buffer cavity and the fluid in the second buffer cavity to flow to the output port (310) from opposite directions so as to reduce noise generated by the inner wall of the fluid friction output port (310).

2. A noise reducing pump head according to claim 1, wherein a plurality of buffer compartments (321) are provided in the first buffer chamber (320).

3. A noise reducing pump head according to claim 2, wherein a plurality of said arrays of buffer compartments (321) are provided within said first buffer chamber (320).

4. A noise reducing pump head according to claim 2, wherein the damping grid (321) is provided with a guiding wall (321A) in the form of a cambered surface.

5. A noise reduction pump head according to claim 1, wherein the output port (310) is disposed at a center of the pump cover (300), and the first buffer chamber (320) and the second buffer chamber (330) are disposed in central symmetry around the output port (310).

6. A noise reducing pump head according to claim 1, wherein a partition (311) is provided between the first buffer chamber (320) and the second buffer chamber (330), the partition (311) defining a movement trajectory of the gas towards the output port (310).

7. A noise reducing pump head according to claim 1, wherein the transport assembly (200) comprises a valve seat (220), a one-way valve being provided on the valve seat (220), the one-way valve being completely covered by an orthographic projection of the first buffer chamber (320) and the second buffer chamber (330) on the valve seat (220).

8. A noise reducing fluid pump comprising a noise reducing pump head according to any one of claims 1 to 7 and a drive mechanism (400), said drive mechanism (400) being drivingly connected to said pump functional assembly (100) for driving operation of said pump functional assembly (100).

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