CN215409129U

CN215409129U - Miniature air pump

Info

Publication number: CN215409129U
Application number: CN202121380821.4U
Authority: CN
Inventors: 王海雨
Original assignee: Guangdong Keyukang Technology Co ltd
Current assignee: Guangdong Keyukang Technology Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-01-04
Anticipated expiration: 2031-06-21

Abstract

The utility model discloses a miniature air pump, comprising: a rotation driving device; the pump body comprises a shell and a pump assembly, the shell is connected with the rotary driving device, the pump assembly comprises a piston leather bowl part, a valve plate and a sealing cover, the piston leather bowl part is hermetically connected with the valve plate and forms a variable volume cavity, the valve plate and the sealing cover are jointly provided with an air inlet cavity and an air outlet cavity, and the air inlet cavity and the air outlet cavity are respectively communicated with the variable volume cavity in a one-way mode; the valve plate is equipped with the air inlet and the suction nozzle that communicate in the air inlet chamber and communicate in the gas outlet and the play gas nozzle that go out the air cavity, and the valve plate is equipped with air inlet baffle and the baffle of giving vent to anger respectively between air inlet and suction nozzle and between gas outlet and the play gas nozzle, and the opening has all been seted up to two baffles, and two openings are located respectively and correspond the gas port and correspond the common distant point position of air cock. The utility model lengthens the airflow flowing distance of the air inlet cavity and the air outlet cavity, weakens the impact of the airflow on the flow channel, thereby reducing the vibration caused by the airflow and achieving the purpose of reducing the noise.

Description

Miniature air pump

Technical Field

The utility model relates to the technical field of displacement pumps, in particular to a miniature air pump.

Background

The pump body is a device capable of removing fluid from a closed space or adding fluid from the closed space, the pump body which is widely applied in industry is a micro air pump, and the micro air pump has the advantages of small volume, low power consumption, stable working condition and the like, so that the pump body is widely applied to the industries of medical health, scientific research, laboratories, environmental protection, instruments and meters, chemical industry, household appliances and the like.

The existing micro air pump can increase the rated air flow by increasing the rotation speed of the motor or increasing the volume of the pump assembly, but it is known that when the rated air flow of the micro air pump is increased, the noise generated by the micro air pump is increased, and in order to reduce the noise, the structure of the existing micro air pump needs to be improved.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a micro air pump, which solves one or more of the problems of the prior art and provides at least one of the advantages of the present invention.

A micro air pump according to an embodiment of a first aspect of the present invention includes:

the rotary driving device is provided with a rotating shaft, and the rotating shaft is synchronously connected with an eccentric wheel;

the pump body comprises a shell and a pump assembly, the shell is connected to the rotary driving device, the pump assembly comprises a piston rod, a leather cup, a valve plate and a sealing cover, one end of the piston rod is rotatably connected to the eccentric wheel, the other end of the piston rod is connected to the leather cup, the leather cup is in sealing connection with the valve plate, so that a variable volume cavity is formed between the leather cup and the valve plate, the shell, the valve plate and the sealing cover are sequentially connected, the valve plate and the sealing cover are jointly provided with an air inlet cavity and an air outlet cavity, the air inlet cavity and the air outlet cavity are respectively in one-way conduction with the variable volume cavity, the air inlet cavity is conducted towards the direction of the variable volume cavity, and the variable volume cavity is conducted towards the direction of the air outlet cavity; the valve plate be equipped with communicate in the air inlet and the suction nozzle in suction chamber, the valve plate be equipped with communicate in the gas outlet and the play air cock in play air cavity, the air inlet with the gas outlet all with variable volume cavity direct intercommunication, the suction nozzle with go out the air cock all with the direct intercommunication of outside air, the valve plate is in the air inlet with be equipped with inlet baffle between the suction nozzle, inlet baffle has seted up the air inlet opening, inlet opening is located the air inlet with on the common distant point position of suction nozzle, the valve plate is in the gas outlet with be equipped with the baffle of giving vent to anger between the air cock, the baffle of giving vent to anger has seted up the opening of giving vent to anger, the opening of giving vent to anger be located the gas outlet with go out on the common distant point position of air cock.

The miniature air pump provided by the embodiment of the utility model at least has the following beneficial effects: when the rotary driving device drives the eccentric wheel to rotate, the piston rod can move back and forth along with the eccentric wheel, so that the volume of the variable-volume cavity can be circularly changed through the back and forth movement of the piston rod, and finally the suction and discharge functions of the miniature air pump are realized; compared with the prior art, the utility model lengthens the airflow flowing distance of the air inlet cavity and the air outlet cavity and weakens the impact of the airflow on the flow channel, thereby reducing the vibration caused by the airflow and achieving the purpose of reducing the noise.

According to some embodiments of the utility model, the valve plate is provided with a first noise reduction wall between the air inlet opening and the air inlet nozzle, and the height of the first noise reduction wall is higher than that of the air inlet nozzle; the valve plate is in give vent to anger the opening with it falls the wall to make an uproar to be equipped with the second between the gas outlet nozzle, the wall is fallen to make an uproar to the second highly is higher than the gas outlet nozzle. The arrangement of the noise reduction wall can lengthen the airflow flowing distance of the flow passage again so as to strengthen the noise reduction effect.

According to some embodiments of the present invention, the top surface of the first noise reduction wall is provided with a first inclined surface, and the first inclined surface is arranged to incline upwards along the direction from the air inlet nozzle to the air inlet opening; the top surface of the second noise reduction wall is provided with a second inclined surface, and the second inclined surface is arranged along the direction of the air outlet opening towards the air outlet nozzle in an upward inclined mode. The inclined plane can guide and comb the airflow passing through the noise reduction wall to avoid generating turbulent flow.

According to some embodiments of the utility model, the sealing cover comprises a cover plate and a sealing rubber pad, and the cover plate and the valve plate are in sealing connection through the sealing rubber pad, that is, the valve plate and the sealing rubber pad are provided with the air inlet cavity and the air outlet cavity together.

According to some embodiments of the present invention, the cover plate is provided with two indication marks, and the two indication marks respectively correspond to the air inlet nozzle and the air outlet nozzle, so that a user can visually identify the air inlet nozzle and the air outlet nozzle.

According to some embodiments of the present invention, the valve plate is provided with a first one-way conduction member and a second one-way conduction member at a position of the air inlet and a position of the air outlet, respectively, the first one-way conduction member and the second one-way conduction member cover the air inlet and the air outlet, respectively, the first one-way conduction member is in one-way conduction along the direction from the air inlet cavity to the variable volume cavity, and the second one-way conduction member is in one-way conduction along the direction from the variable volume cavity to the air outlet cavity. When the variable volume cavity is in a positive pressure state, the gas in the variable volume cavity flows through the gas outlet and the gas outlet cavity in sequence, and is discharged to the outside from the gas outlet nozzle.

According to some embodiments of the utility model, the first unidirectional conducting member and the second unidirectional conducting member are both the umbrella T or the membrane, because both the umbrella T and the membrane have excellent unidirectional conducting performance.

According to some embodiments of the utility model, a bearing is mounted at one end of the piston rod, and the piston rod is rotatably connected to the eccentric wheel via the bearing. The arrangement of the bearing can reduce the rotation loss between the eccentric wheel and the piston rod so as to improve the quality of eccentric motion.

According to some embodiments of the utility model, the housing comprises a housing frame connected to the rotary drive device and a removable cover detachably connected to the housing frame for facilitating maintenance or repair of the pump assembly within the pump body.

According to some embodiments of the utility model, the rotary driving device is an electric motor or a pneumatic motor, the electric motor is driven by electric power, the pneumatic motor is driven by compressed gas, and the electric motor or the pneumatic motor can be selected by users according to different use conditions.

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

Drawings

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

FIG. 1 is a schematic perspective view of a micro air pump according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the micro air pump shown in FIG. 1 with the housing removed;

FIG. 3 is an exploded view of the micro air pump shown in FIG. 1;

fig. 4 is a schematic perspective view of a valve plate according to an embodiment of the present invention.

In the drawings: 100-rotary driving device, 200-pump body, 110-rotating shaft, 111-eccentric wheel, 210-shell, 300-pump assembly, 310-piston rod, 320-leather cup, 330-valve plate, 340-sealing cover, 311-bearing, 400-air inlet cavity, 500-air outlet cavity, 410-air inlet, 420-air inlet nozzle, 510-air outlet, 520-air outlet nozzle, 430-first one-way conduction piece, 530-second one-way conduction piece, 440-air inlet baffle, 441-air inlet gap, 540-air outlet baffle, 541-air outlet gap, 450-first noise reduction wall, 451-first inclined plane, 550-second noise reduction wall, 551-second inclined plane, 341-cover plate, 342-sealing rubber pad, 343-indication mark, 211-shell frame, 212-Movable cover.

Detailed Description

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

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1 to 3, a micro air pump according to an embodiment of the first aspect of the present invention includes a rotation driving device 100 and a pump body 200, wherein the rotation driving device 100 is selected as a motor, the rotation driving device 100 is provided with a rotating shaft 110, and the rotating shaft 110 is synchronously connected with an eccentric wheel 111; in order to realize the synchronous connection between the rotating shaft 110 and the eccentric wheel 111, the rotating shaft 110 is provided with a flat position, the eccentric wheel 111 is provided with an eccentric hole matched with the structure of the flat position, or the rotating shaft 110 and the eccentric hole are synchronously connected through a key and a key slot. In other embodiments, an air motor may be used in place of the electric motor, but because of its large size, an air motor is not preferred for the present invention.

As shown in fig. 2 to 4, the pump body 200 includes a housing 210 and a pump assembly 300, the housing 210 is connected to the rotary driving device 100, the pump assembly 300 includes a piston rod 310, a cup 320, a valve plate 330, and a cover 340, a bearing 311 is installed at one end of the piston rod 310, the piston rod 310 is rotatably connected to the eccentric 111 through the bearing 311, the other end of the piston rod 310 is connected to the cup 320, the cup 320 is sealingly connected to the valve plate 330 through an adhesive, such that a variable volume cavity is formed between the cup 320 and the valve plate 330, the piston rod 310 performs a piston motion along with the eccentric rotation of the eccentric 111, and the piston rod 310 changes the volume of the variable volume cavity by driving the cup 320. The housing 210, the valve plate 330 and the sealing cover 340 are sequentially connected through connecting bolts, the valve plate 330 and the sealing cover 340 are jointly provided with an air inlet cavity 400 and an air outlet cavity 500, the air inlet cavity 400 and the air outlet cavity 500 are not communicated with each other, the valve plate 330 is provided with an air inlet 410 and an air inlet nozzle 420 which are communicated with the air inlet cavity 400, the valve plate 330 is provided with an air outlet 510 and an air outlet nozzle 520 which are communicated with the air outlet cavity 500, the air inlet 410 and the air outlet 510 are both directly communicated with the variable volume cavity, the air inlet nozzle 420 and the air outlet nozzle 520 are both directly communicated with the outside air, the valve plate 330 is provided with a first one-way conduction piece 430 and a second one-way conduction piece 530 on the position of the air inlet 410 and the position of the air outlet 510 respectively, the first one-way conduction piece 430 and the second one-way conduction piece 530 can be selected as an umbrella nut or a diaphragm, and the first one-way conduction piece 430 and the second one-way conduction piece 530 cover the air inlet 410 and the air outlet 510 respectively The first one-way conduction member 430 is in one-way conduction along the direction from the air inlet cavity 400 to the variable volume cavity, and the second one-way conduction member 530 is in one-way conduction along the direction from the variable volume cavity to the air outlet cavity 500. When the cavity volume of the leather cup 320 gradually increases along with the piston movement of the piston rod 310, the variable volume cavity is in a negative pressure state, in this state, the external air sequentially flows through the air inlet nozzle 420, the air inlet cavity 400 and the air inlet 410, and finally enters the variable volume cavity; when the cavity volume of the leather cup 320 is gradually reduced along with the movement of the piston rod 310, the variable volume cavity is in a positive pressure state, in this state, the gas in the variable volume cavity sequentially flows through the gas outlet 510 and the gas outlet cavity 500, and is finally discharged to the outside from the gas outlet nozzle 520, and along with the continuous movement of the piston rod 310, the variable volume cavity is alternately in two different states, so that the suction and discharge functions of the micro air pump are realized.

As the rated air flow of the micro air pump increases, the noise generated during the operation of the micro air pump also increases, and in order to alleviate this, as shown in fig. 4, an air inlet baffle 440 is disposed on the valve plate 330 between the air inlet 410 and the air inlet nozzle 420, the air inlet baffle 440 is used for blocking the air flow between the air inlet 410 and the air inlet nozzle 420, the air inlet baffle 440 is opened with an air inlet gap 441, and the air inlet gap 441 is located at a common far point position of the air inlet 410 and the air inlet nozzle 420, so that the air inlet 410 and the air inlet nozzle 420 can communicate with each other through the air inlet gap 441 for the longest distance; the valve plate 330 is provided with an air outlet baffle 540 between the air outlet 510 and the air outlet nozzle 520, the air outlet baffle 540 is used for blocking air flow between the air outlet 510 and the air outlet nozzle 520, the air outlet baffle 540 is provided with an air outlet opening 541, and the air outlet opening 541 is located at a common far point position of the air outlet 510 and the air outlet nozzle 520, so that the air outlet 510 and the air outlet nozzle 520 can be communicated with each other at the longest distance through the air outlet opening 541. In this embodiment, the inlet opening 441 is located at the middle position of the inlet baffle 440, the outlet opening 541 is located at the middle position of the outlet baffle 540, and at this time, the inlet baffle 440 is provided with the inlet opening 441 at a position far away from the inlet nozzle 420, and the outlet baffle 540 is provided with the outlet opening 541 at a position far away from the outlet nozzle 520. Through the arrangement, the micro air pump lengthens the airflow flowing distance between the air inlet cavity 400 and the air outlet cavity 500, and weakens the impact of the airflow on the flow channel, so that the vibration caused by the airflow is reduced, and the purpose of reducing the noise is achieved.

Further, the valve plate 330 is provided with a first noise reduction wall 450 between the air inlet opening 441 and the air inlet nozzle 420, the height of the first noise reduction wall 450 is higher than that of the air inlet nozzle 420, the top surface of the first noise reduction wall 450 is provided with a first inclined surface 451, and the first inclined surface 451 is inclined upwards along the direction from the air inlet nozzle 420 to the air inlet opening 441; the valve plate 330 is provided with a second noise reduction wall 550 between the air outlet opening 541 and the air outlet nozzle 520, the second noise reduction wall 550 is higher than the air outlet nozzle 520, the top surface of the second noise reduction wall 550 is provided with a second inclined surface 551, and the second inclined surface 551 is inclined upward along the air outlet opening 541 toward the air outlet nozzle 520. The arrangement can lengthen the airflow flowing distance of the flow channel again to strengthen the noise reduction effect, and the inclined plane is arranged in the flowing direction of the airflow, so that the airflow passing through the noise reduction wall can be guided and combed to avoid generating turbulent flow.

In some embodiments of the present invention, as shown in fig. 3, in order to ensure the sealing performance between the sealing cover 340 and the valve plate 330, the sealing cover 340 includes a cover plate 341 and a sealing rubber pad 342, and the cover plate 341 and the valve plate 330 are connected in a sealing manner by the sealing rubber pad 342, that is, the valve plate 330 and the sealing rubber pad 342 together form the air inlet chamber 400 and the air outlet chamber 500. In addition, the cover plate 341 is provided with two indicators 343, and the two indicators 343 correspond to the inlet nozzle 420 and the outlet nozzle 520, respectively, so that a user can visually recognize the inlet nozzle 420 and the outlet nozzle 520.

In some embodiments of the present invention, in order to facilitate maintenance or repair of the pump assembly 300, the housing 210 includes a housing 211 and a movable cover 212, the housing 211 is connected to the rotary driving apparatus 100, and the movable cover 212 is detachably connected to the housing 211 by a connection bolt. Before maintenance or repair of the pump assembly 300, the movable cover 212 is removed first, and then the cover 340 and the valve plate 330 are removed in sequence.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A micro air pump, comprising:

the rotary driving device (100) is provided with a rotating shaft (110), and the rotating shaft (110) is synchronously connected with an eccentric wheel (111);

the pump body (200) comprises a shell (210) and a pump assembly (300), wherein the shell (210) is connected with the rotary driving device (100), the pump assembly (300) comprises a piston rod (310), a cup (320), a valve plate (330) and a sealing cover (340), one end of the piston rod (310) is rotatably connected with the eccentric wheel (111), the other end of the piston rod (310) is connected with the cup (320), the cup (320) is hermetically connected with the valve plate (330), so that a variable-volume cavity is formed between the cup (320) and the valve plate (330), the shell (210), the valve plate (330) and the sealing cover (340) are sequentially connected, the valve plate (330) and the sealing cover (340) are jointly provided with an air inlet cavity (400) and an air outlet cavity (500), the air inlet cavity (400) and the air outlet cavity (500) are respectively communicated with the variable-volume cavity in a one way, the air inlet cavity (400) is communicated towards the variable volume cavity, and the variable volume cavity is communicated towards the air outlet cavity (500); the valve plate (330) is provided with an air inlet (410) and an air inlet nozzle (420) which are communicated with the air inlet cavity (400), the valve plate (330) is provided with an air outlet (510) and an air outlet nozzle (520) which are communicated with the air outlet cavity (500), the air inlet (410) and the air outlet (510) are directly communicated with the variable volume cavity, the air inlet nozzle (420) and the air outlet nozzle (520) are directly communicated with the outside air, the valve plate (330) is provided with an air inlet baffle plate (440) between the air inlet (410) and the air inlet nozzle (420), the air inlet baffle plate (440) is provided with an air inlet notch (441), the air inlet notch (441) is positioned at a common far point position of the air inlet (410) and the air inlet nozzle (420), the valve plate (330) is provided with an air outlet baffle plate (540) between the air outlet (510) and the air outlet nozzle (520), the air outlet baffle (540) is provided with an air outlet gap (541), and the air outlet gap (541) is positioned at the common far point position of the air outlet (510) and the air outlet nozzle (520).

2. The micro air pump according to claim 1, wherein: the valve plate (330) is provided with a first noise reduction wall (450) between the air inlet notch (441) and the air inlet nozzle (420), and the height of the first noise reduction wall (450) is higher than that of the air inlet nozzle (420); the valve plate (330) is provided with a second noise reduction wall (550) between the air outlet notch (541) and the air outlet nozzle (520), and the height of the second noise reduction wall (550) is higher than that of the air outlet nozzle (520).

3. The micro air pump according to claim 2, wherein: the top surface of the first noise reduction wall (450) is provided with a first inclined surface (451), and the first inclined surface (451) is arranged in an upward inclined mode along the direction from the air inlet nozzle (420) to the air inlet gap (441); the top surface of the second noise reduction wall (550) is provided with a second inclined surface (551), and the second inclined surface (551) is obliquely arranged upwards along the air outlet opening (541) towards the air outlet nozzle (520).

4. The micro air pump according to claim 1, wherein: the sealing cover (340) comprises a cover plate (341) and a sealing rubber pad (342), and the cover plate (341) is in sealing connection with the valve plate (330) through the sealing rubber pad (342).

5. The micro air pump according to claim 4, wherein: the cover plate (341) is provided with two indicating marks (343), and the two indicating marks (343) respectively correspond to the air inlet nozzle (420) and the air outlet nozzle (520).

6. The micro air pump according to claim 1, wherein: valve plate (330) is equipped with first one-way conduction spare (430) and second one-way conduction spare (530) respectively on the position of air inlet (410) and the position of gas outlet (510), first one-way conduction spare (430) with second one-way conduction spare (530) cover respectively air inlet (410) with gas outlet (510), first one-way conduction spare (430) are followed admit air chamber (400) toward the direction one-way conduction of variable volume cavity, second one-way conduction spare (530) are followed variable volume cavity is toward the direction one-way conduction of giving vent to anger chamber (500).

7. The micro air pump according to claim 6, wherein: the first one-way conduction piece (430) and the second one-way conduction piece (530) are both nuts or diaphragms.

8. The micro air pump according to claim 1, wherein: and a bearing (311) is installed at one end of the piston rod (310), and the piston rod (310) is rotatably connected with the eccentric wheel (111) through the bearing (311).

9. The micro air pump according to claim 1, wherein: the shell (210) comprises a shell frame (211) and a movable cover (212), the shell frame (211) is connected with the rotary driving device (100), and the movable cover (212) is detachably connected with the shell frame (211).

10. The micro air pump according to claim 1, wherein: the rotary drive device (100) is an electric motor or a pneumatic motor.