CN114738233A

CN114738233A - Air blowing device

Info

Publication number: CN114738233A
Application number: CN202210494364.4A
Authority: CN
Inventors: 吴霖军; 徐雪峰
Original assignee: Ningbo Roumu Electric Co ltd
Current assignee: Ningbo Roumu Electric Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-07-12

Abstract

The invention discloses a blowing device, wherein the opening and closing state of an air pressure balance port is controlled by an execution element, a driving mechanism drives a piston to move in a piston cavity in a telescopic manner, so that a valve core opens or closes an air outlet channel under the action of the pressure difference between the inside and the outside of the air pressure balance channel and a reset piece, the inflation operation and the intermittent dust removal operation of equipment to be inflated are realized, the pressurization effect is realized by opening the air pressure balance port during dust removal and inflation, the dust removal can be carried out efficiently, the flow rate of the inflation gas can be improved, a user can select an operation mode according to the requirement, and the blowing device has multiple functions, simple structure and relatively convenient operation.

Description

Air blowing device

Technical Field

The invention relates to the technical field of dust removing equipment, in particular to a blowing device.

Background

In order to conveniently inflate a device to be inflated (such as a tire), people generally adopt an inflator pump to inflate the device, and the conventional inflator pump needs manual operation, so that the labor intensity is high and the inflation efficiency is low. In order to improve the inflation efficiency, an electric inflator pump is available on the market, and generally comprises a motor, a transmission gear and a piston assembly, wherein the motor rotates to drive the piston to reciprocate through the transmission gear. When the air pump is inflated, the motor pulls the piston rod out of the cylinder part through the transmission gear, and a valve of the piston is opened by atmospheric pressure, so that air enters the cylinder; when the motor pushed the piston rod into the cylinder through the transmission gear, the valve of the piston was closed, and gas entered into the tire through the cylinder, and the function was comparatively single, if as the dust removal, because pressure is less and lead to the dust removal effect relatively poor.

Disclosure of Invention

In view of the above analysis, the present invention provides an air blowing device to solve the deficiencies of the prior art.

The invention is mainly realized by the following technical scheme:

the invention provides an air blowing device, which comprises:

the shell is provided with a piston cavity, a gas storage cavity and a gas outlet channel;

a piston slidably engaged within the piston cavity;

the driving mechanism is arranged on the shell, connected with the piston and used for driving the piston to move;

the valve seat is arranged on the shell and is provided with an air pressure balance channel, the air inlet end of the air pressure balance channel is provided with a first opening, and the air outlet end of the air pressure balance channel is provided with an air pressure balance port;

the valve core is movably arranged on the air pressure balance channel, a reset piece is arranged between the valve core and the valve seat, the valve core is provided with a first plugging surface and a second plugging surface, the first plugging surface is matched with the valve seat to open or plug the air inlet of the air outlet channel, the area of the first plugging surface is larger than that of the air inlet end of the air outlet channel, the second plugging surface is matched with the valve seat to open or plug the first opening, and a gap is formed between the valve core and the inner wall of the air pressure balance channel;

the actuating element is arranged at the air pressure balancing port in a matching way and is used for opening or closing the air pressure balancing port;

when the second plugging surface of the valve core is matched and abutted with the first opening, a gap is formed between the first plugging surface of the valve core and the air inlet of the air outlet channel, and the air storage cavity is communicated with the air outlet channel; when the first plugging surface of the valve core is matched and abutted with the air inlet of the air outlet channel, a gap is reserved between the second plugging surface of the valve core and the first opening, and the air storage cavity is communicated with the air pressure balance channel.

Further, the driving mechanism comprises a driving motor and a transmission assembly, and the piston is in transmission connection with an output shaft of the driving motor through the transmission assembly.

Further, the transmission assembly comprises a driving gear and a driven gear, the driving gear is mounted on an output shaft of the driving motor, the driven gear is rotatably mounted on the shell and meshed with the driving gear, an eccentric shaft is arranged on the driven gear, and a rod of the piston is rotatably mounted on the eccentric shaft.

Further, the valve core comprises a valve column and a valve cap installed on the valve column, the valve column is at least partially installed in the air pressure balance channel in a sliding mode, the gap exists in the valve column, the valve cap is arranged outside the first opening, and the valve cap is respectively provided with a first plugging surface opposite to the air inlet of the air outlet channel and a second plugging surface opposite to the first opening.

Furthermore, the piston cavity is provided with an air outlet hole, and the air outlet hole is provided with a first valve plate located outside the piston cavity.

Furthermore, the valve of the piston is provided with an air inlet communicated with the air inlet end of the air outlet.

Further, the actuator is a solenoid valve.

Further, when the piston and the piston cavity are completely sealed, the central axis of the piston cavity is perpendicularly intersected with the central axis of the eccentric shaft, and the central axis of the rotating shaft of the driven gear is positioned on the left side of the central axis of the piston cavity.

Furthermore, a control panel is installed on the shell, a key switch is arranged on the control panel, and the control panel is respectively connected with the execution element and the driving mechanism.

Further, the casing includes end shell and lid shell, the piston chamber sets up in the end shell to be equipped with the second opening that supplies the piston to pass through on the end shell, the disk seat is installed in the end shell, executive component, actuating mechanism install outside the end shell, gas outlet channel sets up in the lid shell, the lid shell cooperates the assembly with the end shell in order to form the gas storage chamber.

Further, still include barrel and end cap, still be equipped with the annular wall of coaxial locating the second opening outside in the end shell, the one end seal installation of barrel is on the annular wall, the end cap seal installation is on the other end of barrel, the piston sliding fit sets up with the end cap in the barrel relatively.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that:

according to the air blowing device provided by the invention, the opening and closing state of the air pressure balance port is controlled by the execution element, the driving mechanism drives the piston to move in the piston cavity in a telescopic mode, so that the valve core opens or closes the air outlet channel under the action of the pressure difference between the inside and the outside of the air pressure balance channel and the reset piece, the air inflation operation and the intermittent dust removal operation of equipment to be inflated are realized, the air pressure balance port is opened during dust removal and inflation to realize the pressurization effect, the dust removal can be carried out efficiently and the air inflation flow rate can be improved, a user can select a corresponding operation mode according to the requirement, the functions are various, the structure is simple, the operation is more convenient, and the consumption of electric energy can be reduced by intermittent dust removal.

The first sealing surface of the valve core keeps abutting against the air inlet of the air outlet channel under the action of the reset piece, the executing element opens the air pressure balance port in an inflation mode, the piston fills external air into the air storage cavity through the piston cavity, a small part of air in the air storage cavity enters the air pressure balance channel through the gap and is discharged from the air pressure balance port, the edge of the first sealing surface of the valve core is extruded and moved under the action of air pressure along with the rise of the air pressure in the air storage cavity, the air leaves the air inlet of the air outlet channel, the air in the air storage cavity is discharged from the air outlet channel, the second sealing surface seals the first opening, the reset piece is in a compression state at the moment, when the driving mechanism stops air extraction, the air pressure in the air storage cavity is reduced, and when the air pressure is smaller than the elastic force of the elastic piece, the first sealing surface restores to seal the air inlet of the air outlet channel. In a dust removal mode, the execution element is controlled to be switched between an open state and a closed state according to set time, the piston fills external air into the air storage cavity through the piston cavity, when the execution element is opened, the air is discharged from the air outlet of the air outlet channel, when the execution element is closed, the air cannot be discharged from the air pressure balance port, under the combined action of the reset element and the air in the air pressure balance channel, the valve core is extruded to move to block the air inlet of the air outlet channel, and the air cannot be discharged from the air outlet channel, so that intermittent dust removal is realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an air blowing device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the air blowing device according to the embodiment of the present invention during air suction;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a partially exploded view of the blowing device provided by the embodiment of the present invention;

FIG. 5 is a state diagram showing four positions of the piston in the air blowing device according to the embodiment of the present invention.

The reference numbers are as follows:

1. the air storage device comprises a shell, a piston cavity, a gas storage cavity, a gas outlet channel, a gas outlet hole, a shell, an end shell, a shell 11a, a second opening, a shell 11b, an annular wall, a shell 12, a cover shell, a piston 2, a piston 21, a second valve plate, a valve seat 21a, a gas inlet hole, a valve core 5a, a first blocking surface, a second blocking surface, a valve plug 51, a valve column 52, a valve cap 6, an actuating element 7, a first valve plate, a control plate 8, a control plate 9, a key switch 10, a reset piece 13, a cylinder body 14 and an end cap, and a driving mechanism 31, a driving motor 32, a transmission assembly 321, a driving gear 322, a driven gear 323, an eccentric shaft 4, a valve seat 4, a gas pressure balance channel 4b, a first opening, 4c, a gas pressure balance port 5, and a valve core.

Detailed Description

In order that those skilled in the art will better understand the invention and thus more clearly define the scope of the invention as claimed, it is described in detail below with respect to certain specific embodiments thereof. It should be noted that the following is only a few embodiments of the present invention, and the specific direct description of the related structures is only for the convenience of understanding the present invention, and the specific features do not of course directly limit the scope of the present invention. Such alterations and modifications as are made obvious by those skilled in the art and guided by the teachings herein are intended to be within the scope of the invention as claimed.

The invention is further described with reference to the following figures and specific examples.

Example 1

As shown in fig. 1 to 4, the present invention provides an air blowing device including: the air storage device comprises a shell 1, a piston, an air storage cavity and an air outlet channel, wherein the shell is provided with a piston cavity 1a, an air storage cavity 1b and an air outlet channel 1 c; a piston 2 which is in sliding fit in the piston cavity 1 a; the driving mechanism 3 is arranged on the shell 1, connected with the piston 2 and used for driving the piston 2 to move; the valve seat 4 is arranged on the shell 1, an air pressure balance channel 4a is arranged on the valve seat, a first opening 4b is arranged at the air inlet end of the air pressure balance channel 4a, and an air pressure balance opening 4c is arranged at the air outlet end of the air pressure balance channel 4 a; the valve core 5 is movably arranged on the air pressure balance channel 4a, a reset piece 10 is arranged between the valve core 5 and the valve seat 4, the valve core 5 is provided with a first plugging surface 5a and a second plugging surface 5b, the first plugging surface 5a is matched with an air inlet of the air outlet channel 1c to open or plug the air inlet of the air outlet channel 1c, the area of the first plugging surface 5a is larger than that of an air inlet end of the air outlet channel 1c, the second plugging surface 5b is matched with the air inlet end of the air outlet channel to open or plug the first opening 4b, and a gap exists between the valve core 5 and the inner wall of the air pressure balance channel 4 a; and the actuating element 6 is matched with the air pressure balancing port 4c and is used for opening or closing the air pressure balancing port 4 c.

When the second plugging surface 5b of the valve core 5 is matched and abutted with the first opening 4b, a gap is formed between the first plugging surface 5a of the valve core 5 and the air inlet of the air outlet channel 1c, and the air storage cavity 1b is communicated with the air outlet channel 1 c; when the first plugging surface 5a of the valve core 5 is matched and abutted with the air inlet of the air outlet channel 1c, a gap exists between the second plugging surface 5b of the valve core 5 and the first opening 4b, and the air storage cavity 1b is communicated with the air pressure balance channel 4 a.

In the inflation mode, the actuator 6 opens the air pressure balancing port 4c, and the inflation operation is performed. In the dust removal mode, the actuator 6 is switched between the opening of the air pressure balance port 4c and the closing of the air pressure balance port 4c, and the valve core 5 is switched between the opening of the air inlet of the air outlet channel 1c and the closing of the air inlet of the air outlet channel 1c, so that intermittent dust removal is realized.

In this embodiment, the actuating element 6 is the solenoid valve, is convenient for according to the pulse signal who sets for, realizes intermittent type dust removal control, and the pressure of giving vent to anger is big in the twinkling of an eye, and dust removal effect is better. The magnet of the electromagnetic valve is controlled to be attracted and released by electrifying and powering off, so that the magnet is close to or far away from the air pressure balancing port 4 c.

In the present embodiment, the valve seat 4 is provided opposite to the air outlet passage 1 c. The valve core 5 is internally provided with a cavity, and the resetting piece 10 is accommodated in the cavity and is propped against the inner wall where the air pressure balance port 4c is positioned, so that when the external force applied to the first plugging surface 5a is not more than the elastic force of the resetting piece 10, air leakage can be reduced. Wherein, the reset piece 10 is a spring, the elastic force of which makes it abut against the air inlet of the air outlet channel 1c and can be easily opened under the action of the air pressure in the air storage cavity 1 b.

For convenient installation and dismantlement, specifically, casing 1 includes end shell 11 and lid shell 12, and piston chamber 1a sets up in end shell 11 to be equipped with the second opening 11a that supplies piston 2 to pass through on end shell 11, disk seat 4 installs in end shell 11, and actuating element 6, actuating mechanism 3 install outside end shell 11, and outlet channel 1c sets up in lid shell 12, and lid shell 12 and end shell 11 cooperation assembly are in order to form gas storage chamber 1 b.

In this embodiment, the end shell 11 and the cover shell 12 are clamped, fastened or inserted, and then fixed by screws. And a sealing ring is arranged between the end shell 11 and the cover shell 12 so as to improve the sealing performance of the air blowing device, improve the air blowing efficiency and increase the air flow velocity. The air pressure balance port 4c is provided on the end wall of the end case 11, and the air outlet of the air outlet passage 1c is provided on the end wall of the cover case 12.

Specifically, a control panel 8 is installed on the housing 1, a key switch 9 is arranged on the control panel 8, and the control panel 8 is respectively connected with the actuator 6 and the driving mechanism 3.

Different modes are controlled through corresponding key switches 9, and an indicator lamp is arranged on the control panel 8 and used for prompting the working state of the air blowing device.

Preferably, the driving mechanism 3 comprises a driving motor 31 and a transmission assembly 32, and the piston 2 is in transmission connection with an output shaft of the driving motor 31 through the transmission assembly 32. The driving motor 31 rotates to drive the piston 2 to extend and retract in the piston cavity 1a under the driving action of the driving component 32, so that rapid air suction and rapid air inflation are realized.

Specifically, the transmission assembly 32 includes a driving gear 321 and a driven gear 322, the driving gear 321 is mounted on an output shaft of the driving motor 31, the driven gear 322 is rotatably mounted on the housing 1 and engaged with the driving gear 321, an eccentric shaft 323 is disposed on the driven gear 322, and a rod of the piston 2 is rotatably mounted on the eccentric shaft 323.

In this embodiment, the housing 1 is provided with a rotating shaft, a first bearing is arranged between the top of the rotating shaft and the driven gear 322, and a second bearing is arranged between the top of the eccentric shaft 323 and the rod of the piston 2, so that the torque between the rod of the piston 2 and the driven gear 322 is small, the torque generated in the working process is reduced, and the loss is reduced.

Preferably, the valve body 5 includes a valve post 51 and a valve cap 52 mounted on the valve post 51, the valve post 51 is at least partially slidably mounted in the air pressure balance passage 4a and is in the gap, and the valve cap 52 is disposed outside the first opening 4b and has a first blocking surface 5a opposite to the air inlet of the air outlet passage 1c and a second blocking surface 5b opposite to the first opening 4 b.

The valve core 5 is arranged between the valve seat 4 and the air outlet channel 1c, the moving direction of the valve core 5 is guided through the valve seat 4, the valve column 51 is arranged in the valve seat 4 and is provided with a gap, the communication between the piston cavity 1a and the external atmosphere through the air pressure balance channel 4a can be realized, and the position of the valve core 5 is controlled, when the air pressure balance port 4c is opened or closed, the second plugging surface 5b is abutted against the first opening 4b to open the air outlet channel 1c, or the first plugging surface 5a is abutted against the air inlet of the air outlet channel 1c to close the air outlet channel 1c, the structural design is more reliable, and the control is more convenient.

The area of first shutoff face 5a is greater than the area of outlet channel 1c inlet end, when atmospheric pressure balance mouth 5a opened, has gas when having in the gas storage chamber 1b and has certain atmospheric pressure, forms certain pressure to the part that shutoff face 5a exposes outlet channel 1c inlet end outside, and case 5 can open fast, and the gas of being convenient for passes through outlet channel 1c fast.

In this embodiment, the first plugging surface 5a is circular, and the air inlet end surface of the air outlet channel 1c is circular, so that the stress is uniform, better fitting is facilitated, and air leakage is avoided.

In this embodiment, the spool 51 and the bonnet 52 may be provided separately or integrally, the valve seat 4 and the end shell 11 are provided integrally, and the air pressure balance port 4c is provided on the side wall of the housing 1.

Specifically, the piston cavity 1a is provided with an air outlet hole 1d, and the air outlet hole 1d is provided with a first valve plate 7 located outside the piston cavity 1 a.

The piston 2 compresses the piston cavity 1a, the first valve plate 7 opens the air outlet 1d to communicate the piston cavity 1a with the air storage cavity 1b, and when the piston 2 is pumped, the first valve plate 7 closes the air outlet 1d to block the piston cavity 1a from the air storage cavity 1 b.

In this embodiment, the air outlet holes 1d are circumferentially spaced.

The casing 1 is also internally provided with an air pressure detection element, under the inflation mode, when the air pressure detection element detects that the air pressure in the air storage cavity 1b reaches an air pressure threshold value, the control panel 8 controls the driving mechanism 3 to stop working, closes the execution element 6 and does not work, and when the air pressure is lower than the air pressure threshold value, the driving mechanism 3 is restarted and the execution element 6 is opened to prevent the casing 1 from shaking due to overlarge air pressure.

The blowing device is also externally provided with a mechanical switch for controlling the driving motor 31, when the blowing device operates in an intermittent dust removal mode, the mechanical switch cannot stop working due to the fact that the air pressure in the air storage cavity 1b reaches an air pressure threshold value, only when the air pressure is larger than 87psi, the driving motor 31 stops working, the control switch needs to be switched on again, the driving motor 31 can be started for intermittent dust removal, and the blowing device is protected.

In the intermittent dust removal mode, a dust blowing mode lamp is on, the mechanical switch is closed to control the driving motor 31 to work, the working state of the executing element 6 is controlled, specifically, the power-on suction is carried out for 2s, then the power is cut off for 0.2s, the reciprocating work is carried out, when the executing element 6 is in the power-off state, the air pressure balancing port 4c is closed, a sealed environment is formed in the air storage cavity 1b, the air outlet hole 1d is closed when the piston 2 is used for exhausting air, the piston 2 fills the external air into the air storage cavity 1b through the piston cavity 1a through the air inlet 2a, the air exhausting operation of the piston 2 has no influence on the amount of the air in the air storage cavity 1b, the air pressure in the air storage cavity 1b is instantly increased along with the fact that the piston 2 is continuously inflated into the air storage cavity 1b, and after the executing element 6 is powered on, high-pressure air is rapidly ejected from the air outlet of the air outlet channel 1c to achieve the dust blowing effect, and the air blowing efficiency can be remarkably improved.

Specifically, the valve 21 of the piston 2 is provided with an air inlet hole 21a communicated with the air inlet end of the air outlet hole 1 d.

Valve 21 is the rubber bowl, the slope of rubber bowl edge sets up, because driven gear 322 is at the pulling and the in-process that promotes the motion of 2 pole portions of piston, 2 pole portions of piston are except when being located two positions (A, C positions) of piston chamber a central line completely sealed, all the other are the tilt state, along with driven gear 322 rotates pulling 2 pole portions of piston, the rubber bowl shrink and edge one side receive extrusion deformation, the inlet port 21a of rubber bowl also opens, make the outside gas get into in the piston chamber 1a, then inclination slowly increases and slowly reduces again, it is close to second opening 11a to 2 pole portions of piston. When the driven gear 322 pushes the rod part of the piston 2, the rubber cup is unfolded and the other side of the edge is extruded and deformed, the air inlet hole 21a is closed, and then the inclination angle is slowly increased and slowly decreased until the rubber cup is close to the air outlet hole 1d and the piston cavity 1a to finally realize complete sealing.

As shown in fig. 5, in order to prevent air leakage, in this embodiment, the central axes of the rod portions of the piston 2 at the position A, C are overlapped, and the included angles between the central axes and the central axes of the rod portions of the piston 2 at the position B, D are smaller than the inclination angle of the edge of the rubber bowl when the rod portion of the piston 2 is at the position A, C. For convenience of illustration, the arc-shaped hole at the eccentric shaft 323 on the driven gear 322 is omitted.

In this embodiment, when the piston 2 is completely sealed with the piston chamber 1a (i.e., A, C position), the central axis E of the piston chamber 1a intersects the central axis of the eccentric shaft 323 perpendicularly, and the central axis of the rotation shaft of the driven gear 322 is located on the left side of the central axis of the piston chamber 1 a. So as to reduce the air leakage phenomenon generated in the motion process of the piston 2 and improve the air outlet pressure. The point F is the center of the upper end surface of the rotating shaft of the driven gear 322, and the central axis of the rotating shaft of the driven gear 322 passes through the point F.

Preferably, the piston further comprises a cylinder 13 and an end cap 14, the end shell 11 further has an annular wall 11b coaxially disposed beside the second opening 11a, one end of the cylinder 13 is sealingly mounted on the annular wall 11b, the end cap 14 is sealingly mounted on the other end of the cylinder 13, and the piston 2 is slidably fitted in the cylinder 13 and disposed opposite to the end cap 14.

In the present embodiment, the annular wall 11b is provided integrally with the end shell 11. The venthole 1d sets up on end cap 14, is equipped with the projection on the outer end wall of end cap 14, and first valve block 7 is installed on the projection and is laminated venthole 1d and set up.

In this embodiment, the sealing rings are respectively disposed between the cylinder 13 and the end cap 14 and between the cylinder and the annular wall 11b to further improve the sealing performance of the gas storage cavity 1b, so that the gas in the piston cavity 1a completely enters the gas storage cavity 1b from the gas outlet 1d, and gas leakage is avoided.

In order to improve the structural strength of the piston cavity 1a and ensure the reliability of the piston 2 during inflation and air exhaust, the cylinder 13 is respectively welded or screwed with the end cap 14 and the annular wall 11 b.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. An air blowing device, characterized by comprising:

the air storage device comprises a shell (1) provided with a piston cavity (1a), an air storage cavity (1b) and an air outlet channel (1 c);

a piston (2) slidably fitted within the piston chamber (1 a);

the driving mechanism (3) is arranged on the shell (1), connected with the piston (2) and used for driving the piston (2) to move;

the valve seat (4) is arranged on the shell (1), an air pressure balance channel (4a) is arranged on the valve seat, a first opening (4b) is arranged at the air inlet end of the air pressure balance channel (4a), and an air pressure balance opening (4c) is arranged at the air outlet end of the air pressure balance channel (4 a);

the valve core (5) is movably arranged on the air pressure balance channel (4a), a reset piece (10) is arranged between the valve core (5) and the valve seat (4), the valve core (5) is provided with a first blocking surface (5a) and a second blocking surface (5b), the first blocking surface (5a) is matched with the valve seat to open or block an air inlet of the air outlet channel (1c), the area of the first blocking surface (5a) is larger than that of an air inlet end of the air outlet channel (1c), the second blocking surface (5b) is matched with the valve seat to open or block the first opening (4b), and a gap exists between the valve core (5) and the inner wall of the air pressure balance channel (4 a);

the actuating element (6) is arranged on the air pressure balancing port (4c) in a matching way and is used for opening or closing the air pressure balancing port (4 c);

when the second plugging surface (5b) of the valve core (5) is matched and abutted with the first opening (4b), a gap is formed between the first plugging surface (5a) of the valve core (5) and the air inlet of the air outlet channel (1c), and the air storage cavity (1b) is communicated with the air outlet channel (1 c); when the first plugging surface (5a) of the valve core (5) is matched and abutted with the air inlet of the air outlet channel (1c), a gap is reserved between the second plugging surface (5b) of the valve core (5) and the first opening (4b), and the air storage cavity (1b) is communicated with the air pressure balance channel (4 a).

2. The insufflation apparatus of claim 1 wherein: the driving mechanism (3) comprises a driving motor (31) and a transmission assembly (32), and the piston (2) is in transmission connection with an output shaft of the driving motor (31) through the transmission assembly (32).

3. The insufflation apparatus of claim 2 wherein: the transmission assembly (32) comprises a driving gear (321) and a driven gear (322), the driving gear (321) is installed on an output shaft of the driving motor (31), the driven gear (322) is rotatably installed on the shell (1) and meshed with the driving gear (321), an eccentric shaft (323) is arranged on the driven gear (322), and a rod part of the piston (2) is rotatably installed on the eccentric shaft (323).

4. The insufflation apparatus of claim 1 wherein: the valve core (5) comprises a valve column (51) and a valve cap (52) arranged on the valve column (51), wherein the valve column (51) is at least partially arranged in the air pressure balance passage (4a) in a sliding mode and a gap exists between the valve column and the valve cap, the valve cap (52) is arranged outside the first opening (4b) and is respectively provided with a first blocking surface (5a) opposite to the air inlet of the air outlet passage (1c) and a second blocking surface (5b) opposite to the first opening (4 b).

5. The insufflation apparatus of claim 1 wherein: and an air outlet hole (1d) is formed in the piston cavity (1a), and a first valve plate (7) located outside the piston cavity (1a) is arranged on the air outlet hole (1 d).

6. The insufflation apparatus of claim 5 wherein: and an air inlet hole (21a) communicated with the air inlet end of the air outlet hole (1d) is formed in the valve (21) of the piston (2).

7. The insufflation apparatus of claim 1 wherein: the actuating element (6) is an electromagnetic valve.

8. The insufflation apparatus of claim 3 wherein: when the piston (2) and the piston cavity (1a) are completely sealed, the central axis of the piston cavity (1a) is vertically intersected with the central axis of the eccentric shaft (323), and the central axis of the rotating shaft of the driven gear (322) is positioned on the left side of the central axis of the piston cavity (1 a).

9. The insufflation apparatus of any one of claims 1 and 5 to 6 including: casing (1) is including end shell (11) and lid shell (12), piston chamber (1a) sets up in end shell (11) to be equipped with second opening (11a) that supply piston (2) to pass through on end shell (11), install in end shell (11) disk seat (4), execute component (6), actuating mechanism (3) are installed outside end shell (11), air outlet channel (1c) sets up in lid shell (12), lid shell (12) and end shell (11) cooperation assembly are in order to form gas storage chamber (1 b).

10. The insufflation apparatus of claim 9, wherein: still include barrel (13) and end cap (14), still be equipped with annular wall (11b) of coaxial locating second opening (11a) outside in end shell (11), the one end seal installation of barrel (13) is on annular wall (11b), end cap (14) seal installation is on the other end of barrel (13), piston (2) sliding fit sets up in barrel (13) and relative with end cap (14).