CN222415173U

CN222415173U - Micro vacuum pump and micro vacuum device

Info

Publication number: CN222415173U
Application number: CN202421120834.1U
Authority: CN
Inventors: 李百峰
Original assignee: Shenzhen Longyi Science And Technology Co ltd
Current assignee: Shenzhen Longyi Science And Technology Co ltd
Priority date: 2024-05-21
Filing date: 2024-05-21
Publication date: 2025-01-28
Anticipated expiration: 2034-05-21

Abstract

The embodiment of the utility model provides a miniature vacuum pump and a miniature vacuumizing device, wherein the miniature vacuum pump comprises an air collecting and exhausting chamber, a driving motor and a rotating seat, a first channel is formed on an output shaft of the driving motor, a second channel is formed inside the rotating seat, and a sealing plug, the second channel comprises a guide section and a control section, the tail end of the guide section is positioned at a position, far away from the first channel, on the rotating seat, the tail end of the control section is positioned at a position, close to the first channel, on the rotating seat and communicated with an inner cavity of the air collecting and exhausting chamber, the control section is provided with a conducting hole, the sealing plug is slidably arranged in the control section and between the conducting hole and the tail end of the control section, a sealing part for sealing the conducting hole is formed at a position, facing the middle part of one side surface of the conducting hole, of the sealing plug, which is positioned at the periphery of the sealing part or on the inner side wall of the control section, is also provided with an air guide groove for communicating the spaces at two opposite sides of the sealing plug. The embodiment can reduce the assembly difficulty and the production cost.

Description

Micro vacuum pump and micro vacuum pumping device

Technical Field

The embodiment of the utility model relates to the technical field of vacuumizing devices, in particular to a miniature vacuum pump and a miniature vacuumizing device.

Background

The existing small household appliances such as small vacuum packaging machine and electric breast pump all need a vacuumizing device, and the large vacuum pump and the vacuumizing device widely applied in industry or commerce are not suitable due to different requirements on performance indexes such as power, vacuum degree, service life, noise, volume, safety and the like, and a miniature vacuumizing device is needed. A conventional micro vacuum pumping device generally comprises a micro vacuum pump and a controller.

The existing miniature vacuum pump comprises an air collecting and exhausting chamber provided with an air inlet nozzle and an air exhausting hole, a driving motor assembled at one end of the air collecting and exhausting chamber and an output shaft penetrating through the end wall of the adjacent end of the air collecting and exhausting chamber and extending into the inner cavity of the air collecting and exhausting chamber, and a rotating seat assembled at the tail end of the output shaft, wherein the output shaft is a hollow shaft with a first channel penetrating axially in order to realize vacuumizing and exhausting, a second channel with one end in butt joint communication with the first channel and the other end in communication with the inner cavity of the air collecting and exhausting chamber is formed in the rotating seat, a sealing plug for controlling the on-off of the second channel and a spring for promoting the sealing plug to open the second channel are further arranged in the second channel, when the miniature vacuum pump needs vacuumizing, the output shaft of the driving motor rotates, so that the sealing plug generates centrifugal force to overcome the elasticity of the spring to plug the second channel, and when the vacuum is needed to break, the centrifugal force of the sealing plug weakens, and the spring pushes the sealing plug to move towards the direction of the first channel to reset to open the second channel.

However, in a specific embodiment, the inventor finds that the elastic force design of the spring is difficult to achieve a more ideal state, when the vacuum is pumped, one side of the sealing plug close to the first channel is connected with the external atmosphere and has relatively larger atmospheric pressure, the other opposite side of the sealing plug is connected with the almost vacuum inner cavity of the air collecting and exhausting chamber, the received air pressure is relatively smaller, when the vacuum is needed to be broken, the elastic force of the spring must overcome the resistance generated by the air pressure difference to push the sealing plug to move due to the air pressure difference, if the elastic force is too small, the sealing plug cannot be effectively pushed to move to break the vacuum, however, if the elastic force of the spring is too large, when the vacuum is pumped, relatively larger centrifugal force must be generated to push the sealing plug to seal the second channel.

Disclosure of utility model

The technical problem to be solved by the embodiment of the utility model is to provide the miniature vacuum pump which can reduce the assembly and design difficulties and can effectively ensure the smoothness of vacuumizing and breaking.

The technical problem to be solved by the embodiment of the utility model is to provide the miniature vacuumizing device which can reduce the assembly and design difficulties.

In order to solve the technical problems, the embodiment of the utility model firstly provides the following technical scheme that the micro vacuum pump comprises:

An air collecting and exhausting chamber provided with an air inlet nozzle and an air outlet hole;

The output shaft of the driving motor penetrates through the end wall of the adjacent end of the exhaust collection chamber and stretches into the inner cavity of the exhaust collection chamber, and the output shaft is a hollow shaft with a first channel penetrating along the axial direction;

A rotary seat assembled at the tail end of the output shaft, a second channel with one end communicated with the first channel in a butt joint way and the other end communicated with the inner cavity of the exhaust collecting chamber and a rotary seat formed inside the rotary seat

The sealing plug is arranged in the second channel and used for controlling the on-off of the second channel;

The second channel comprises a guide section and a control section which are sequentially communicated, the starting end of the guide section is communicated with the first channel, the tail end of the guide section is located at the position, far away from the first channel, on the rotating seat, the starting end of the control section is communicated with the tail end of the guide section, the tail end of the control section is located at the position, close to the first channel, on the rotating seat and communicated with the inner cavity of the air collecting and exhausting chamber, a through hole with the aperture smaller than that of the inner cavity of the control section is formed in the starting end of the control section, the sealing plug is slidably arranged in the control section and located between the through hole and the tail end of the control section, the sealing plug faces towards the middle part of one side surface of the through hole and is opposite to the through hole to form a sealing part used for sealing the through hole, and an air guide groove which is located at the periphery of the sealing part or between the inner side wall of the control section and the side surface of the sealing plug and opposite to the periphery side surface of the inner side wall and is provided with air guide grooves which are communicated with the space on two opposite sides.

Further, the side of the control section far away from one end of the through hole is provided with a communication hole communicated with the inner cavity of the exhaust collecting chamber, the middle part of the end face of the control section far away from one end of the through hole faces towards the direction of the through hole, the sealing plug is blocked and positioned by the blocking protruding block when sliding towards the direction far away from the through hole, an annular guide groove is formed between the side of the blocking protruding block and the inner side wall of the control section, and the air guide groove and the communication hole are communicated with the annular guide groove.

Further, the inner hole of the control section is a stepped hole with one thick end and one thin end and is connected with the guide section through a thick hole end, a valve body with a through hole is assembled in the thick hole end, a first sealing ring is arranged between the outer peripheral surface of the valve body and the inner wall of the thick hole end, the through hole is opposite to the thin hole end of the control section, the sealing plug is assembled in the thin hole end, and one end, far away from the thick hole end, of the thin hole end is communicated with the inner cavity of the air collecting and exhausting chamber.

Further, the valve body protrudes towards the middle of one side surface of the sealing plug correspondingly to form a boss, and a corresponding end hole of the via hole is formed in the middle of the boss.

Further, the swivel base includes:

The middle part of the base body is provided with a shaft hole which is sleeved and fixed with the tail end of the output shaft correspondingly, an inner hole which extends from the shaft hole to the outer side surface of the first side of the base body and forms an outlet on the outer side surface of the first side is also formed in the base body, and the thick hole end of the control section also corresponds to an inlet on the outer side surface of the first side of the base body;

and for the side cover which is fixed on the outer side of the outer side surface of the first side of the base body and covers the outlet of the inner hole and the inlet of the rough hole end, a through groove which is correspondingly connected with the outlet of the inner hole and the inlet of the rough hole end is also arranged on the inner side surface of the side cover or the outer side surface of the first side of the base body, and the guide section is formed by the inner hole and the through groove together.

Further, the first side of base member still has the draw-in groove, the opposite both sides limit of side cap respectively towards the base member is protruding to be stretched and is formed the elasticity pothook, the side cap with the elasticity pothook corresponds collude detain in the draw-in groove and be fixed to the base member on, the medial surface of side cap with the lateral surface butt of the first side of base member just is provided with the second sealing washer in the butt face department of both, the export of hole, the entry of thick hole end with the logical groove all is located the inboard of second sealing washer.

Further, the elastic clamping hook is T-shaped and comprises an elastic arm protruding from the corresponding side edge of the side cover and a hooking arm extending to two opposite sides at the tail end of the elastic arm perpendicular to the elastic arm, wherein the elastic arm is correspondingly accommodated in the clamping groove, and the hooking arm is correspondingly hooked on the periphery of the outer side of the notch of one end of the clamping groove far away from the side cover.

Further, the swivel mount includes a weight disposed on a second side of the base opposite the first side.

Further, a sealing gasket made of elastic materials and used for forming the sealing part is arranged in the middle of one side surface of the sealing plug, which faces the through hole.

In order to solve the further technical problems, the embodiment of the utility model further provides a technical scheme that the micro vacuum pumping device comprises a micro vacuum pump and a controller which is connected with a driving motor of the micro vacuum pump and used for controlling the working state of the driving motor, wherein the micro vacuum pump is the vacuum pump.

After the technical scheme is adopted, the second channel at least has the advantages that the second channel is composed of the guide section and the control section, the tail end of the guide section is located at the position, far away from the first channel, on the rotating seat, the starting end of the control section is communicated with the tail end of the guide section through the through hole, when the output shaft of the driving motor drives the rotating seat to rotate, the sealing plug slidingly arranged in the control section moves towards the through hole under the action of centrifugal force, so that the through hole is sealed and covered, the external atmosphere cannot be communicated with the inner cavity of the air collecting and exhausting chamber through the first channel and the second channel, vacuumizing operation of the micro vacuum pump can be achieved, when the output shaft of the driving motor stops rotating gradually, the centrifugal force born by the sealing plug is reduced until the centrifugal force disappears, the air pressure of the external atmosphere pushes away the sealing plug located in the control section automatically through the first channel, finally, air enters the inner cavity of the air collecting and exhausting chamber, the vacuum exhausting operation is achieved, the whole structure is very simple, a spring is not required, and assembly and design are very simple.

Drawings

Fig. 1 is a schematic diagram of a split structure of an alternative embodiment of the micro vacuum pump of the present utility model.

Fig. 2 is a schematic diagram of an assembled structure of an alternative embodiment of the micro vacuum pump of the present utility model.

Fig. 3 is a schematic diagram showing a disassembling structure of a rotary base of an alternative embodiment of the micro vacuum pump of the present utility model.

FIG. 4 is a schematic cross-sectional view of a substrate of an alternative embodiment of the micro vacuum pump of the present utility model.

Fig. 5 is a schematic view of the valve body of an alternative embodiment of the micro vacuum pump of the present utility model.

Fig. 6 is a schematic view of an end cap of an alternative embodiment of the micro vacuum pump of the present utility model.

Fig. 7 is a schematic cross-sectional view of a micro vacuum pump according to an alternative embodiment of the present utility model, with the sealing plug covering the via hole.

Fig. 8 is a schematic cross-sectional view of an alternative embodiment of the micro vacuum pump of the present utility model with the sealing plug not covering the via hole.

Fig. 9 is a schematic cross-sectional view of an alternative embodiment spin stand of the micro vacuum pump of the present utility model.

FIG. 10 is a schematic block diagram of an alternative embodiment of the micro vacuum apparatus of the present utility model.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the specific examples. It should be understood that the following exemplary embodiments and descriptions are only for the purpose of illustrating the utility model and are not to be construed as limiting the utility model, and that the embodiments and features of the embodiments of the utility model may be combined with one another without conflict.

As shown in fig. 1-9, an alternative embodiment of the present utility model provides a micro vacuum pump a comprising:

A gas collecting and exhausting chamber 1 provided with a gas inlet nozzle 10 and a gas outlet hole 12;

A driving motor 3 assembled at one end of the exhaust collection chamber 1, wherein an output shaft 30 of the driving motor 3 penetrates through an end wall of an adjacent end of the exhaust collection chamber 1 and extends into an inner cavity 14 of the exhaust collection chamber 1, and the output shaft 30 is a hollow shaft with a first channel 301 penetrating along an axial direction inside;

A rotary seat 5 assembled at the tail end of the output shaft 3, a second channel 50 with one end communicated with the first channel 301 in a butt joint way and the other end communicated with the inner cavity 10 of the gas collecting and exhausting chamber 1 is formed in the rotary seat 5, and

A sealing plug 7 arranged in the second channel 50 and used for controlling the on-off of the second channel 50;

The second channel 50 comprises a guiding section 501 and a control section 503 which are sequentially communicated, the starting end of the guiding section 501 is communicated with the first channel 301, the tail end of the guiding section is located at a position, far away from the first channel 301, on the rotating seat 5, the starting end of the control section 503 is communicated with the tail end of the guiding section 501, the tail end of the control section 503 is located at a position, close to the first channel 301, on the rotating seat 5 and communicated with the inner cavity 14 of the gas collecting and exhausting chamber 1, a conducting hole 505 with a smaller aperture than that of the inner cavity of the control section 503 is formed in the starting end of the control section 503, the sealing plug 7 is slidably arranged in the control section 503 and located between the conducting hole 505 and the tail end of the control section 503, a part, facing the middle part of one side surface of the conducting hole 505, of the sealing plug 7, facing the conducting hole 505, forms a sealing part 70 for sealing the conducting hole 505, a sealing plug space is formed on the sealing plug 7, at the periphery of the sealing part 70 or between the inner side wall of the control section 503 and the side surface of the inner wall 7, facing the sealing plug 7, and the two opposite side surfaces of the sealing plug 7 are provided with sealing plug grooves.

According to the embodiment of the utility model, the second channel 50 consists of the guide section 501 and the control section 503, the tail end of the guide section 501 is positioned at the position, far away from the first channel 301, on the rotating seat, the starting end of the control section 503 is communicated with the tail end of the guide section 501 through the through hole 505, when the output shaft 30 of the driving motor 3 drives the rotating seat 5 to rotate, the sealing plug 7 slidingly arranged in the control section 503 moves towards the through hole 505 under the action of centrifugal force, so that the through hole 505 is sealed and covered, the external atmosphere cannot be communicated with the inner cavity 14 of the air collecting and exhausting chamber 1 through the first channel 301 and the second channel, and thus the vacuumizing operation of the micro vacuum pump can be realized, when the output shaft 30 of the driving motor 3 stops rotating gradually, the centrifugal force born by the sealing plug 7 is reduced until the centrifugal force disappears, and the air pressure of the external atmosphere is greatly pushed away from the sealing plug 7 positioned in the control section 503 through the first channel 301, so that air enters the inner cavity 14 of the air collecting and exhausting chamber 1 finally, the whole structure is very simple, and the assembly and design are very simple.

In a specific implementation, the configuration of the air guide groove 503a may be flexibly changed according to design requirements, for example, the air guide groove 503a is disposed on the inner side wall of the control section 503 (as shown in fig. 4), or the air guide groove 503a is disposed on the peripheral side surface of the sealing plug 7, or a gap is formed between the peripheral side surface of the sealing plug 7 and the inner side wall of the control section 503 to form the air guide groove 503, in this scheme, the size of the sealing plug 7 needs to be slightly smaller than the size of the inner cavity of the control section 503 by reasonably designing the sealing plug 7, and the area of the sealing part 70 is also larger than the area of the opening of the through hole 505, so that the sealing plug 7 can slide back and forth in the control section 503 relative to the through hole 505, but no overturn or no sealing of the sealing part 7 can be aligned with the through hole 505 to implement sealing.

In an alternative embodiment of the present utility model, as shown in fig. 4 and fig. 7-fig. 9, a side surface of one end of the control section 503 far from the through hole 505 is provided with a communication hole 506 communicated with the inner cavity 14 of the exhaust collecting chamber 1, a middle part of an end surface of one end of the control section 503 far from the through hole 505 protrudes towards the through hole 505, the sealing plug 7 is blocked and positioned by the blocking protrusion 507 when sliding towards the direction far from the through hole 505, an annular guide groove 508 is formed between the side surface of the blocking protrusion 507 and the inner side wall of the control section 503, and the air guide groove 503a and the communication hole 506 are both communicated with the annular guide groove 508. In this embodiment, the stop bump 507 is further disposed on the control section 503, so that the limit sealing plug 7 can be effectively stopped, and the annular guide groove 508 on the side surface of the stop bump 507 is communicated with the air guide groove 503a and the communication hole 506, so that the air path is ensured to be communicated, the sealing plug 7 is prevented from blocking the air path, and the vacuum exhaust is effectively realized.

In an alternative embodiment of the present utility model, as shown in fig. 3 to 5 and fig. 7 to 8, the inner hole of the control section 503 is a stepped hole with a thick end and a thin end, and the thick end is connected to the guide section 501, a valve body 8 with the through hole 505 formed in the center is assembled in the thick end, a first sealing ring 80 is disposed between the outer peripheral surface of the valve body 8 and the inner wall of the thick end, the through hole 505 is opposite to the thin end of the control section 503, the sealing plug 7 is assembled in the thin end, and the end of the thin end far from the thick end is communicated with the inner cavity 14 of the gas collecting and exhausting chamber 1. In this embodiment, the valve body 8 is assembled in the control section 503, the through hole 505 on the valve body 8 is movably sealed by the sealing plug 7, the structure is relatively simple, and the valve body 8 and the sealing plug 7 are correspondingly installed by the thick hole end and the thin hole end of the control section 503, so that effective positioning can be realized. In practice, a caulking groove may be provided on the outer peripheral surface of the valve body 8 and/or the inner wall of the rough hole end, thereby positioning the first seal ring 80.

In an alternative embodiment of the present utility model, as shown in fig. 5 and fig. 7-8, a boss 82 is formed by correspondingly protruding the middle part of the surface of the valve body 8 facing the sealing plug 7, and the hole at the corresponding end of the through hole 505 is formed in the middle part of the boss 82. In this embodiment, the boss 82 is further disposed on the valve body 8, and the boss 82 may be abutted against the sealing plug 7, so as to improve the sealing effect of the sealing plug 7 on the through hole 505.

In an alternative embodiment of the present utility model, as shown in fig. 3-4 and fig. 7-8, the rotating seat 5 includes a base 52, a shaft hole 521 sleeved and fixed on the end of the output shaft 30 is provided in the middle of the base 52, an inner hole 523 extending from the shaft hole 521 to the outer side of the first side of the base 52 and forming an outlet on the outer side of the first side is further formed in the base 52, and a rough hole end of the control section 503 corresponds to an inlet on the outer side of the first side of the base 52;

For the side cover 54 fixed to the outside of the first side of the base 52 and covering the outlet of the inner hole 523 and the inlet of the rough hole end, a through groove 541 is provided on the inside of the side cover 54 or the outside of the first side of the base 52, which is correspondingly connected to the outlet of the inner hole 523 and the inlet of the rough hole end, and the inner hole 523 and the through groove 541 together form the guide section 501.

In this embodiment, the rotary seat 5 is assembled and formed by the base 52 and the side cover 54, and the shaft hole 521 and the inner hole 523 are formed on the base 52, so that the through groove 541 is formed in the inner side surface of the side cover 54, thereby facilitating the forming of the guide section 501, and simultaneously facilitating the installation of the sealing plug 7 and the valve body 8 into the control section 503, and the second channel 50 is L-shaped overall, thereby prolonging the gas path and reducing the noise generated when the gas passes.

In an alternative embodiment of the present utility model, as shown in fig. 3 and 6, the first side of the base 52 is further formed with a clamping groove 525, opposite sides of the side cover 54 respectively protrude toward the base 52 to form an elastic clamping hook 543, the side cover 54 is fastened to the base 52 by the elastic clamping hook 543 corresponding to the clamping groove 525, the inner side surface of the side cover 54 abuts against the outer side surface of the first side of the base 52, and a second sealing gasket 545 is disposed at the abutting surface of the inner side surface and the outer side surface, and the outlet of the inner hole 523, the inlet of the rough hole end and the through groove 541 are all located inside the second sealing gasket 545. In this embodiment, the elastic hooks 543 of the side cover 54 are engaged with the clamping grooves 525 of the base 52, so that the side cover 54 can be assembled quickly, and the second sealing gasket 545 is provided to seal the outlet of the inner hole 523, the inlet of the rough hole end and the through groove 541. In particular implementations, a caulking groove may be provided on an inner side surface of the side cover 54 and/or an outer side surface of the first side of the base 52 to position the second sealing gasket 545.

In an alternative embodiment of the present utility model, as shown in fig. 3 and 6, the elastic hook 543 has a T shape, and includes an elastic arm 543a protruding from a corresponding side of the side cover 54, and a hooking arm 543b extending from an end of the elastic arm 543a to opposite sides perpendicular to the elastic arm 543a, where the elastic arm 543a is correspondingly accommodated in the clamping groove 525, and the hooking arm 543b is correspondingly hooked on an outer periphery of a notch of the end of the clamping groove 525 away from the side cover 54. In this embodiment, the elastic hook 543 is designed in a T shape, and when in specific assembly, the elastic arm 543a is slightly elastically deformed, and then the elastic arm 543a is correspondingly accommodated in the clamping groove 525, and meanwhile, the hooking arm 543b is hooked to the periphery of the outer side of the notch of the clamping groove 525, so that the assembly can be completed.

In an alternative embodiment of the utility model, as shown in fig. 3, 7-8, the swivel mount 5 includes a weight 56 disposed on a second side of the base 52 opposite the first side. In this embodiment, the weight of the two opposite sides of the rotating seat 5 may be balanced relatively by setting the balancing weight 56 adapted to the weight of the sealing plug 7, so as to ensure the stable rotation of the rotating seat 5. In particular embodiments, corresponding receiving slots may also be provided to position counterweight 56.

In an alternative embodiment of the utility model, as shown in fig. 3 and 7-8, a sealing gasket made of an elastic material for constituting the sealing portion 70 is provided in the middle of the surface of the sealing plug 7 facing the through hole 505. In this embodiment, the sealing gasket is further provided as the sealing portion 70, so as to improve the sealing effect of the sealing plug 7 on the via hole 505, and avoid the occurrence of air leakage during the vacuum pumping operation. In specific implementation, the sealing gasket can be made of elastic materials such as rubber, silica gel and the like.

On the other hand, as shown in fig. 8, an embodiment of the present utility model further provides a micro vacuum pumping device, which includes a micro vacuum pump a and a controller B connected to the driving motor 3 of the vacuum pump a for controlling the working state of the driving motor 3, where the micro vacuum pump is a micro vacuum pump as in the above embodiment. In this embodiment, the micro vacuum pump a is adopted in the micro vacuum device, which can effectively reduce the volume, and reduce the production cost and the working noise.

In addition, the exhaust collecting chamber comprises a cylinder body, a bottom shell, a valve plate, a top cover and a leather cup assembly, wherein a plurality of cylinder chambers which are communicated up and down and are mutually isolated are arranged in the cylinder body, the bottom shell and the valve plate are respectively and hermetically connected to the bottom end and the top end of the cylinder body, the top cover is hermetically connected to the top end of the valve plate, the leather cup assembly is assembled between the cylinder body and the bottom shell, the air inlet nozzle and the air inlet hole are respectively arranged on the bottom shell, the vacuum breaking assembly 7 is assembled in the bottom shell, an output shaft of the driving motor extends into the bottom shell from the bottom surface of the bottom shell, the air outlet nozzle is arranged on the top cover, the valve plate is provided with an air flow hole and a puddle for movably covering the air outlet end of the air flow hole, the leather cup assembly comprises a rocker with a plurality of piston posts and a plurality of leather cups which are connected into a whole, the piston posts and the leather cup assemblies extend into the cylinder chamber from the bottom end and the top end of each cylinder chamber in a one-to-one correspondence mode and are mutually sleeved in the cylinder chamber, the bottom end of the rocker arm is provided with an eccentric shaft, the bottom end of the eccentric shaft is fixed on the rotating seat 5, the eccentric shaft and the eccentric shaft 30 is intersected with the output shaft and the air outlet end are positioned outside the cylinder body and the valve plate.

The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are all within the scope of the present utility model.

Claims

1. A micro vacuum pump, comprising:

The sealing device is characterized in that the second channel comprises a guide section and a control section which are sequentially communicated, the starting end of the guide section is communicated with the first channel, the tail end of the guide section is located at the position, far away from the first channel, on the rotating seat, the starting end of the control section is communicated with the tail end of the guide section, the tail end of the control section is located at the position, close to the first channel, on the rotating seat and communicated with the inner cavity of the air collecting and exhausting chamber, a through hole with the aperture smaller than that of the inner cavity of the control section is formed in the starting end of the control section, the sealing plug is slidably arranged in the control section and located between the through hole and the tail end of the control section, a sealing part for sealing the through hole is formed at the position, facing the middle part of one side surface of the through hole, of the sealing plug is located at the periphery of the sealing part or between the inner side wall of the control section and the sealing plug and the peripheral side surface facing the inner wall, and an air guide groove for communicating the spaces at the two opposite sides is formed.

2. The micro vacuum pump according to claim 1, wherein a communication hole communicated with the inner cavity of the exhaust collection chamber is formed in the side surface of one end of the control section, which is far away from the through hole, a blocking protruding block protrudes towards the direction of the through hole from the middle part of the end surface of one end of the control section, which is far away from the through hole, the sealing plug is blocked and positioned by the blocking protruding block when sliding towards the direction, an annular guide groove is formed between the side surface of the blocking protruding block and the inner side wall of the control section, and the air guide groove and the communication hole are both communicated with the annular guide groove.

3. The micro vacuum pump according to claim 1 or 2, wherein the inner hole of the control section is a stepped hole with a thick end and a thin end, the thick end is connected with the guide section, a valve body with the through hole at the center is assembled in the thick end, a first sealing ring is arranged between the outer peripheral surface of the valve body and the inner wall of the thick end, the through hole is opposite to the thin end of the control section, the sealing plug is assembled in the thin end, and the end of the thin end far away from the thick end is communicated with the inner cavity of the air collecting and exhausting chamber.

4. A micro vacuum pump according to claim 3, wherein the valve body protrudes toward the middle of one side surface of the sealing plug to form a boss, and the corresponding end hole of the via hole is opened at the middle of the boss.

5. A micro vacuum pump as claimed in claim 3, wherein said rotary seat comprises:

6. The micro vacuum pump according to claim 5, wherein the first side of the base is further formed with a clamping groove, opposite side edges of the side cover protrude towards the base to form elastic hooks, the side cover is fastened in the clamping groove by the elastic hooks correspondingly to be fixed on the base, an inner side surface of the side cover is abutted with an outer side surface of the first side of the base, a second sealing gasket is arranged at an abutting surface of the inner side surface and the outer side surface, and the outlet of the inner hole, the inlet of the rough hole end and the through groove are all located on the inner side of the second sealing gasket.

7. The micro vacuum pump of claim 6, wherein the elastic hook is T-shaped and comprises an elastic arm protruding from the corresponding side edge of the side cover and a hooking arm extending to two opposite sides at the tail end of the elastic arm perpendicular to the elastic arm, the elastic arm is correspondingly accommodated in the clamping groove, and the hooking arm is correspondingly hooked on the periphery of the outer side of the notch of the end, far away from the side cover, of the clamping groove.

8. The micro vacuum pump of claim 5, wherein the swivel comprises a weight disposed on a second side of the base opposite the first side.

9. A micro vacuum pump according to claim 1, wherein a sealing gasket made of an elastic material for constituting the sealing portion is provided in a middle portion of a side surface of the sealing plug facing the through hole.

10. A micro vacuum pumping device, comprising a micro vacuum pump and a controller connected with a driving motor of the micro vacuum pump for controlling the working state of the driving motor, wherein the micro vacuum pump is the micro vacuum pump according to any one of claims 1-9.