Miniature vacuum air pump

Abstract

The embodiment of the utility model provides a miniature vacuum air pump which comprises an air collecting and exhausting assembly provided with an exhaust port and a valve plate assembly arranged on the outer side of the exhaust port to control airflow exhausted from the exhaust port, and the valve plate assembly comprises a valve plate and an umbrella pin. The valve plate is provided with an airflow hole allowing airflow to pass through and an insertion hole used for installing the umbrella pin, and the umbrella pin comprises an umbrella rod correspondingly inserted into the insertion hole and an umbrella cover connected to the end, away from the exhaust port, of the umbrella rod and used for movably sealing the airflow hole. A plurality of annular protruding ribs surrounding the umbrella rod are further formed on the surface of the side, facing the valve plate, of the umbrella cover. According to the embodiment of the utility model, when the miniature vacuum air pump sucks air and the umbrella pins fall back to clap the plate surface of the valve plate, the umbrella pins are in contact with the plate surface of the valve plate through the annular convex ribs of the umbrella covers, and the contact surface of the umbrella pins and the plate surface of the valve plate is smaller, so that the noise generated by clapping the valve plate by the umbrella pins is smaller, and the working noise of the miniature vacuum air pump can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the technical field of air pump, especially relates to a micro vacuum air pump. BACKGROUND

[0002] The micro vacuum air pump is used in products such as small vacuum packaging machine, electric breast pump and the like to provide the function of vacuum (negative pressure) suction, the existing micro vacuum air pump mainly includes exhaust assembly provided with exhaust port and valve plate assembly arranged outside the exhaust port to control the airflow discharged from the exhaust port, the valve plate assembly includes valve plate provided with airflow hole and jack and umbrella-shaped part assembled on the valve plate for movingly sealing the airflow hole, wherein the umbrella-shaped part includes umbrella rod corresponding to be inserted into the jack and umbrella cover connected to the end of the umbrella rod away from the exhaust port for movingly sealing the airflow hole.

[0003] However, the inventor found in the specific implementation that the inner surface of the umbrella cover of the conventional umbrella-shaped part is smooth plane, when moving up and down under the impact of airflow, the inner surface of the umbrella cover directly contacts with the valve plate surface with larger area, thus, when the umbrella-shaped part falls and hits the valve plate, larger noise is generated. CONTENT

[0004] The technical problem to be solved by the embodiment of the utility model lies in providing a micro vacuum air pump which can effectively reduce the working noise.

[0005] In order to solve the above technical problem, the embodiment of the utility model provides the following technical scheme: a micro vacuum air pump, comprising: exhaust assembly provided with exhaust port and valve plate assembly arranged outside the exhaust port to control the airflow discharged from the exhaust port, the valve plate assembly includes valve plate and umbrella-shaped part, the valve plate is provided with airflow hole for the airflow to pass through and jack for mounting the umbrella-shaped part, the umbrella-shaped part includes umbrella rod corresponding to be inserted into the jack and umbrella cover connected to the end of the umbrella rod away from the exhaust port for movingly sealing the airflow hole, the side surface of the umbrella cover towards the valve plate is further formed with a plurality of annular ribs arranged around the umbrella rod.

[0006] Further, each annular rib is distributed in concentric circular ring shape.

[0007] Further, each annular rib is arranged at equal intervals.

[0008] Further, the valve plate is provided with a plurality of symmetrically distributed jacks, one umbrella-shaped part is inserted into each jack, and a plurality of airflow holes movingly sealed by the same umbrella-shaped part are uniformly distributed around the corresponding jack on the same circumference around each jack.

[0009] Further, the free end of the umbrella rod is provided with a anti-extraction protrusion for abutting against the end orifice of the insertion hole away from the umbrella cover to prevent the umbrella rod from being extracted out of the insertion hole.

[0010] Further, the micro vacuum air pump further comprises a driving assembly connected to one end of the air collecting and discharging assembly and an end cover arranged at the end of the air collecting and discharging assembly away from the driving assembly, the air outlet comprises a primary air outlet arranged at one end of the air collecting and discharging assembly adjacent to the end cover, and one valve plate assembly is correspondingly arranged outside the primary air outlet to control the air flow discharged through the primary air outlet.

[0011] Further, the air collecting and discharging assembly comprises a hollow shell, one end of the shell forms the primary air outlet and clamps and fixes one valve plate assembly together with the end cover, a primary noise reduction cavity is formed between the end cover and the adjacent valve plate, and an air inlet nozzle is further arranged on the valve plate adjacent to the end cover and communicates with the hollow cavity of the shell and is isolated from the primary noise reduction cavity.

[0012] Further, a first communication hole is further arranged on the valve plate adjacent to the primary noise reduction cavity and communicates with the primary noise reduction cavity, an air discharge channel is formed in the shell wall of the shell and is isolated from the hollow cavity of the shell and communicates with the first communication hole at one end and extends to the end face of the shell adjacent to the driving assembly, the air outlet further comprises a secondary air outlet composed of a channel orifice at one end of the air discharge channel adjacent to the driving assembly, and one valve plate assembly for controlling the air flow discharged through the secondary air outlet and a bottom cover are further arranged outside the end of the shell forming the secondary air outlet, the bottom cover clamps and fixes the valve plate assembly between the bottom cover and the shell together with the shell, a secondary noise reduction cavity is formed between the bottom cover and the adjacent valve plate, and the air flow hole on the valve plate between the bottom cover and the shell corresponds to the secondary air outlet and the secondary noise reduction cavity.

[0013] Further, a buffer cavity is further formed between the valve plate adjacent to the secondary noise reduction cavity and the shell, the valve plate constituting one side cavity wall of the buffer cavity correspondingly protrudes towards the buffer cavity and forms a protruding column, the insertion hole is formed on the protruding column, and the air flow hole is correspondingly arranged around the protruding column.

[0014] Further, an air outlet nozzle is further arranged outside the shell and communicates with the secondary noise reduction cavity through a second communication hole formed on the shell wall of the shell and isolated from the hollow cavity of the shell and a third communication hole formed on the valve plate adjacent to the secondary noise reduction cavity.

[0015] The utility model discloses at least has following beneficial effect after adopting above -mentioned technical scheme: the utility model discloses an embodiment through the annular boss of setting up in the umbrella cover of umbrella Ding's umbrella cover towards the valve plate one side surface, when the micro vacuum air pump inspiration and make umbrella Ding fall back and hit the board surface of valve plate, umbrella Ding is with the board surface of valve plate contact with the annular boss of umbrella cover, the contact surface of both is smaller, thereby make the noise that umbrella Ding hits valve plate produces is smaller, can effectively reduce the working noise of micro vacuum air pump. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the split structure schematic drawing of an optional embodiment of the utility model micro vacuum air pump.

[0017] Figure 2 It is the structure schematic drawing of the exhaust assembly and valve plate assembly of an optional embodiment of the utility model micro vacuum air pump in the split state.

[0018] Figure 3 It is the split structure schematic drawing of an optional embodiment of the utility model micro vacuum air pump after inverting.

[0019] Figure 4 It is the structure schematic drawing of an optional embodiment of the utility model micro vacuum air pump in the combined state.

[0020] Figure 5 It is the cross section structure schematic drawing of umbrella Ding that an optional embodiment of the utility model micro vacuum air pump adopts.

[0021] Figure 6 It is the cross section structure schematic drawing of an optional embodiment of the utility model micro vacuum air pump.

[0022] Figure 7 It is the cross section structure schematic drawing of another angle of an optional embodiment of the utility model micro vacuum air pump.

[0023] Figure 8 It is the cross section structure schematic drawing of the communication air path of secondary noise reduction cavity and exhaust nozzle of an optional embodiment of the utility model micro vacuum air pump. DETAILED DESCRIPTION

[0024] The application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the utility model, and are not as the limitation of the utility model, and the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0025] As Figures 1-8As shown in the utility model one optional embodiment provides a kind of miniature vacuum air pump, comprising: the exhaust assembly 1 with exhaust port 10 and the valve plate assembly 3 for controlling the airflow discharged from the exhaust port 10 by being arranged in the outer side of the exhaust port 10, the valve plate assembly 3 includes valve plate 30 and umbrella 32, the airflow hole 301 for the airflow to pass and the jack hole 303 for installing umbrella 32 are opened on the valve plate 30, the umbrella 32 includes umbrella rod 321 corresponding to be inserted into the jack hole 303 and umbrella cover 323 connected to the end of umbrella rod 321 away from the exhaust port 10 and used to move sealing airflow hole 301, the side surface of umbrella cover 323 towards valve plate 30 is also formed with several annular ribs 3230 around umbrella rod 321.

[0026] The utility model embodiment forms several annular ribs 3230 around umbrella rod 321 on the side surface of umbrella cover 323 of umbrella 32 towards valve plate 30, when miniature vacuum air pump inhales and makes umbrella 32 fall back and hit the board surface of valve plate 30, umbrella 32 is in contact with the board surface of valve plate 30 with annular rib 3230 of umbrella cover 323, and the contact surface of the two is smaller, so that the noise generated when umbrella 32 hits valve plate 30 is smaller, and the working noise of miniature vacuum air pump can be effectively reduced.

[0027] In the utility model one optional embodiment, as shown in Figure 2 And Figure 5 Each annular rib 3230 is concentric circular ring distribution. In the embodiment, each annular rib 3230 is concentric circular ring distribution, which is convenient for molding, and also can enhance the air tightness of umbrella cover 323 to airflow hole 301.

[0028] In the utility model one optional embodiment, as shown in Figure 2 And Figure 5 Each annular rib 3230 is equidistantly arranged. In the embodiment, each annular rib 3230 is equidistantly arranged, which is more uniform, and can enhance the air tightness of umbrella cover 323 to airflow hole 301.

[0029] In the utility model one optional embodiment, as shown in Figures 1-3 Valve plate 30 is provided with a plurality of symmetrically distributed jack holes 303, one umbrella 32 is inserted into each jack hole 303, and a plurality of airflow holes 301 are uniformly distributed on the same circumference around the corresponding jack hole 303 and are moveably sealed by the same umbrella 32 around each jack hole 303. In the embodiment, a plurality of jack holes 303 are arranged on a valve plate 30, a plurality of airflow holes 301 are arranged around each jack hole 303, and a plurality of airflow holes 301 simultaneously control the discharge of airflow, so that the exhaust efficiency is higher.

[0030] In an optional embodiment of the utility model, as shown in Figures 1-3 , as shown in Figure 5 , the free end of the umbrella rod 321 is provided with an anti-extraction protrusion 3210 for abutting against the one end opening of the jack 303 away from the umbrella cover 323 to prevent the umbrella rod 321 from coming out of the jack 303. In this embodiment, the anti-extraction protrusion 3210 is further provided to prevent the umbrella rod 321 from coming out of the jack 303, thereby ensuring the continuous and stable operation of the umbrella 32.

[0031] In an optional embodiment of the utility model, as shown in Figures 1-2 and Figure 6 , the micro vacuum air pump further comprises a driving assembly 5 connected to one end of the air collecting and discharging assembly 1 and an end cover 7 provided at the end of the air collecting and discharging assembly 1 away from the driving assembly 5, and the air outlet 10 comprises a primary air outlet 101 provided at the end of the air collecting and discharging assembly 1 adjacent to the end cover 7, and one valve plate assembly 3 is correspondingly provided outside the primary air outlet 101 to control the air flow discharged through the primary air outlet 101. In this embodiment, the primary air outlet 101 is provided at the end of the air collecting and discharging assembly 1 adjacent to the end cover 7, and one valve plate assembly 3 is correspondingly provided outside the primary air outlet 101, which can effectively utilize the valve plate assembly 3 to control the air flow discharged through the primary air outlet 101.

[0032] In an optional embodiment of the utility model, as shown in Figures 1-2 and Figure 6 , the air collecting and discharging assembly 1 comprises a hollow shell 12, one end of the shell 12 forms the primary air outlet 101 and cooperates with the end cover 7 to clampingly fix one valve plate assembly 3, a primary noise reduction cavity 70 is formed between the end cover 7 and the adjacent valve plate 30, and an air inlet nozzle 305 is further provided on the valve plate 30 adjacent to the end cover 7 and is in communication with the hollow cavity of the shell 12 and is isolated from the primary noise reduction cavity 70. In this embodiment, the air collecting and discharging assembly 1 is provided with the hollow shell 12, which can conveniently cooperate with the end cover 7 to fix the valve plate assembly 3, and the end cover 7 and the valve plate 30 can further form the primary noise reduction cavity 70 to realize noise reduction of the air flow before the air is discharged; and the air inlet nozzle 305 provided on the valve plate 30 is in communication with the hollow cavity of the shell 12, thereby ensuring that the external air can be normally sucked into the shell 12.

[0033] In the specific implementation, as shown in Figure 1 and Figure 6 , the air inlet nozzle 305 can be a perforation 7a penetrating through the top wall of the end cover 7 to the outside; of course, it can also extend to the outside from the side of the valve plate 30.

[0034] In an optional embodiment of the utility model, as shown in Figures 1-3 and Figures 6-7As shown, the valve plate 30 adjacent to the primary noise reduction cavity 70 is also provided with a first communication hole 306 in communication with the primary noise reduction cavity 70, and the shell wall of the shell 12 is formed with an exhaust passage 121 which is isolated from the hollow cavity of the shell 12, one end of which is in communication with the first communication hole 306 and the other end extends to the end face of the shell 12 adjacent to the driving assembly 5. The exhaust port 10 further comprises a secondary exhaust port 103 constituted by the passage opening of the exhaust passage 121 adjacent to one end of the driving assembly 5. The shell 12 is further provided with the valve plate assembly 3 for controlling the airflow discharged through the secondary exhaust port 103 and a bottom cover 9 in sequence outside one end of the shell 12 formed with the secondary exhaust port 103. The bottom cover 9 is clamped and fixed together with the shell 12 to clamp and fix the valve plate assembly 3 between the bottom cover 9 and the shell 12. The secondary noise reduction cavity 90 is formed between the bottom cover 90 and the valve plate 30 adjacent to the bottom cover 90. The airflow hole 301 on the valve plate 30 between the bottom cover 90 and the shell 12 is in communication with the secondary exhaust port 103 and the secondary noise reduction cavity 90. In this embodiment, the exhaust gas is guided from the primary noise reduction cavity 70 at the top end of the shell 12 to the secondary noise reduction cavity 90 at the bottom end of the shell 12 through the first communication hole 306 and the exhaust passage 121, and the valve plate assembly 3 is also assembled in the secondary noise reduction cavity 90. The airflow can be reduced in noise again in the secondary noise reduction cavity 90, thereby reducing the noise when the gas is discharged.

[0035] In an optional embodiment of the utility model, as shown in Figures 1-3 and Figures 6-8 , a buffer cavity 122 is further formed between the valve plate 30 adjacent to the secondary noise reduction cavity 90 and the shell 12. The valve plate 30 constituting one side cavity wall of the buffer cavity 122 is correspondingly protruded to form a protruding column 307 in the buffer cavity 307. The protruding column 307 is formed with the insertion hole 303, and the airflow hole 301 is correspondingly arranged around the protruding column 307. In this embodiment, the airflow can also be buffered and reduced in noise in the buffer cavity 122 by forming the buffer cavity 122 between the valve plate 30 and the shell 12. The umbrella 32 is conveniently arranged on the valve plate 30 by arranging the protruding column 307 on the valve plate 30 and arranging the insertion hole 303 on the protruding column 307, thereby ensuring the normal activity of the umbrella 32. In specific implementation, the airflow hole 301 can be formed as an opening on the side wall of the protruding column 307 as shown in Figure 1 , or can be arranged inside the protruding column 307 and axially penetrate the protruding column 307 like the insertion hole 303, or can be arranged outside the protruding column 307 at a proper distance from the protruding column 307.

[0036] In an optional embodiment of the utility model, as shown in Figure 1 , Figure 2 and Figure 8As shown, the outer side of the shell 12 is further provided with an exhaust nozzle 123, which is communicated with the secondary noise reduction cavity 90 through a second communication hole 125 formed on the shell wall of the shell 12 and isolated from the hollow cavity of the shell 12 and a third communication hole 308 formed on the valve plate 30 adjacent to the secondary noise reduction cavity 90. In this embodiment, the exhaust nozzle 123 is also arranged on the shell 12, the exhaust nozzle 123 and the secondary noise reduction cavity 90 are communicated through the second communication hole 125 and the third communication hole 308, and the air after secondary noise reduction through the secondary noise reduction cavity 90 can be discharged from the exhaust nozzle 123.

[0037] In specific implementation, the exhaust nozzle 123 can also be arranged on the end cover 7 or the bottom cover 9. When the exhaust nozzle 123 is arranged on the end cover 4, it can be directly communicated with the primary noise reduction cavity 70 without the need of the first communication hole 306, the exhaust passage 121, the other valve plate assembly 3 and the bottom cover 9, or still communicated with the secondary noise reduction cavity 90 through the third communication hole 308 opened on the valve plate 3 adjacent to the primary noise reduction cavity 70, the exhaust passage 121 and the second communication hole 125 to realize the exhaust of air flow. When the exhaust nozzle 123 is arranged on the bottom cover 9, it can be directly communicated with the secondary noise reduction cavity 90 without the need of the exhaust passage 121 and the second communication hole 125. In general, the air path of exhaust should be as long as possible to improve the noise reduction effect.

[0038] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the specific implementation above, the specific implementation above is only illustrative but not restrictive, and the ordinary skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, which all belong to the protection scope of the utility model.

Claims

1. A micropump comprising: The exhaust port is provided with a set of exhaust components and a valve plate assembly outside the exhaust port to control the flow of exhaust from the exhaust port, the valve plate assembly includes a valve plate and an umbrella, the valve plate is provided with a gas flow hole for the gas flow and a insertion hole for installing the umbrella, the umbrella includes an umbrella rod inserted into the insertion hole and an umbrella cover connected to the end of the umbrella rod away from the exhaust port for sealing the gas flow hole, characterized in that the side surface of the umbrella cover towards the valve plate is formed with a plurality of annular ribs around the umbrella rod.

2. The micropump of claim 1, wherein Each of the annular ribs is distributed in concentric circular annular shape.

3. The micropump of claim 2, wherein Each of the annular ribs is arranged at equal intervals.

4. The micropump of claim 1, wherein The valve plate is provided with a plurality of symmetrically distributed insertion holes, each of which is inserted with an umbrella, and each of the insertion holes is provided with a plurality of gas flow holes uniformly distributed around the corresponding insertion hole on the same circumference and sealed by the same umbrella.

5. The micropump of claim 1, wherein The free end of the umbrella rod is provided with a anti-extraction protrusion for abutting with the end hole of the insertion hole away from the umbrella cover to prevent the umbrella rod from falling out of the insertion hole.

6. A micropump according to any one of claims 1-5, characterized in that The micro vacuum air pump further comprises a driving assembly connected to one end of the exhaust assembly and an end cover arranged at the end of the exhaust assembly away from the driving assembly, the exhaust port comprises a primary exhaust port arranged at one end of the exhaust assembly adjacent to the end cover, and one valve plate assembly is correspondingly arranged outside the primary exhaust port to control the flow of exhaust through the primary exhaust port.

7. The micropump of claim 6, wherein The exhaust assembly comprises a hollow shell, one end of the shell forms the primary exhaust port and cooperates with the end cover to clamp and fix one valve plate assembly, the end cover and the adjacent valve plate form a primary noise reduction cavity, and the valve plate adjacent to the end cover is further provided with an air inlet connected to the hollow cavity of the shell and isolated from the primary noise reduction cavity.

8. The micropump of claim 7, wherein The valve plate adjacent to the primary noise reduction cavity is further provided with a first communication hole connected to the primary noise reduction cavity, and the shell wall of the shell is formed with an exhaust passage isolated from the hollow cavity of the shell and connected to the first communication hole at one end and extending to the end surface of the shell adjacent to the driving assembly, the exhaust port further comprises a secondary exhaust port formed by the passage opening of the exhaust passage adjacent to the driving assembly, and the end of the shell forming the secondary exhaust port is further provided with one valve plate assembly for controlling the flow of exhaust through the secondary exhaust port and one bottom cover in sequence, the bottom cover cooperates with the shell to clamp and fix the valve plate assembly between the bottom cover and the shell, the bottom cover and the adjacent valve plate form a secondary noise reduction cavity, and the gas flow hole on the valve plate between the bottom cover and the shell corresponds to the secondary exhaust port and the secondary noise reduction cavity.

9. The micropump of claim 8, wherein The valve plate adjacent to the secondary noise reduction cavity and the shell further form a buffer cavity, the valve plate forming one side wall of the buffer cavity correspondingly protrudes into the buffer cavity and is formed with a protruding column, the protruding column is formed with the insertion hole, and the four sides of the protruding column are correspondingly provided with the gas flow hole.

10. The micropump of claim 8, wherein The shell outer side is further provided with an exhaust nozzle, which is communicated with the secondary noise reduction cavity through a second communication hole formed on the shell wall of the shell and isolated from the hollow cavity of the shell and a third communication hole formed on the valve plate adjacent to the secondary noise reduction cavity.

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