Silent air pump

Abstract

A mute air pump comprises a motor and an air cylinder, the motor is installed on the air cylinder, an eccentric wheel, four extrusion pieces, four air bags, a valve block and an air chamber are arranged in the air cylinder, the eccentric wheel is connected with a driving shaft of the motor, a steel needle is installed on the eccentric wheel, the steel needle is connected with a connecting rod, and the four extrusion pieces are evenly distributed on the connecting rod. The extrusion part is connected with the air bag, four air cavities are formed in the air chamber, the four air cavities are communicated through an air path, an air inlet pipe and an air outlet are arranged on the outer surface of the air chamber, the air inlet pipe and the air outlet pipe are communicated with the air path, valve rods are arranged on the valve plates, the valve plates are arc-shaped, the valve plates are arranged in the air cavities, the valve rods penetrate through the air bag to be connected with the extrusion part, one valve plate is arranged in one air cavity, and the other valve plate is arranged in the other air cavity. The motor drives the extrusion part to move up and down through the eccentric wheel. According to the air pump, mute inflation can be kept when the air pump is in large flow, and inflation noise is reduced.

Description

Technical Field

[0001] The utility model relates to an air pump, in particular to a silent air pump with a large flow rate. Background Art

[0002] An air pump, that is, an air pump, is a device that discharges air from a closed space or adds air to a closed space. A micro air pump has the advantages of simple structure, small size, light weight, and low energy consumption, and is widely used in technical fields such as medical devices, motor vehicles, and household appliances. The micro air pump is closely related to the human living environment. The working principle of the micro air pump is that the rotation of the motor drives the piston unit to do up and down linear motion, so that the cylinder part in the piston unit is repeatedly compressed and expanded to perform the air pumping function of the micro air pump. In the prior art, the noise generated when the air pump works is relatively large, and the flow rate of the micro air pump is relatively low, which greatly limits the application range of the micro air pump. Summary of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a silent air pump that reduces noise at a large air flow rate.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A silent air pump includes a motor and a cylinder. The motor is installed on the cylinder. An eccentric wheel, a pressing member, an airbag, a valve plate, and an air chamber are provided in the cylinder. The eccentric wheel is connected to the drive shaft of the motor. There are four airbags and four pressing members respectively. A steel needle is installed on the eccentric wheel and is connected to a connecting rod. The four pressing members are evenly distributed on the connecting rod. The pressing member is connected to the airbag. Four air cavities are provided in the air chamber. The four air cavities are connected through an air path. An air inlet pipe and an air outlet are provided on the outer surface of the air chamber. The air inlet pipe and the air outlet pipe are connected to the air path. A valve rod is provided on the valve plate. The valve plate is arc-shaped. The valve plate is arranged in the air cavity. The valve rod passes through the airbag and is connected to the pressing member. One valve plate is arranged in one air cavity. The motor drives the pressing member to move up and down through the eccentric wheel.

[0006] As a further improvement, the cylinder includes an upper cover, a middle cover, and a lower cover. The airbag is fastened in the middle cover. A fixing plate is provided on the bottom surface of the middle cover. A plurality of air holes are provided on the fixing plate corresponding to the position of the airbag. The valve rod passes through the fixing plate and then enters the airbag. The air cavity and the air path are arranged in the lower cover. The pressing member and the eccentric wheel are located between the upper cover and the middle cover. The upper cover, the middle cover, and the lower cover are connected by bolts. The air inlet pipe and the air outlet are provided on the bottom surface of the lower cover. The motor is connected to the upper cover.

[0007] As a further improvement, the pressing member and the connecting rod are integrally formed.

[0008] As a further improvement, the airbag is in a tower shape.

[0009] As a further improvement, the airbag includes an upper airbag and a lower airbag. There is a partition between the upper airbag and the lower airbag. A through groove is provided on the partition. The extrusion member is inserted into the upper airbag and fixed tightly. The lower airbag faces the air hole of the fixed plate.

[0010] As a further improvement, the motor and the upper cover are locked and connected by screws, and the screws are inserted from the inside of the upper cover.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects:

[0012] Through the extrusion of the four airbags, the intake and exhaust of gas are realized, and the inflation function is completed. The operation is convenient. The four airbags can increase the flow rate and reduce the noise. Description of the Drawings

[0013] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional structure schematic diagram of the utility model;

[0015] Figure 3 It is an exploded structure schematic diagram of the utility model;

[0016] Figure 4 It is a three-dimensional structure schematic diagram of the airbag in the utility model;

[0017] Figure 5 It is a three-dimensional structure schematic diagram of the lower cover of the utility model.

[0018] Reference Signs:

[0019] Motor 1, cylinder 2, upper cover 21, middle cover 22, lower cover 23, eccentric wheel 3, steel needle 4, connecting rod 5, extrusion member 6, airbag 7, upper airbag 70, lower airbag 72, partition 73, through groove 74, air chamber 8, valve plate 9, air passage 10, intake pipe 11, exhaust pipe 12, fixed plate 13. Detailed Embodiments

[0020] The following details the embodiments of the utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model and should not be construed as a limitation of the utility model.

[0021] In the description of the present utility model, it should be understood that if there are terms involved such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] As Figures 1-5 shown, a silent air pump includes a motor 1 and a cylinder 2. The motor 1 is installed on the cylinder 2. An eccentric wheel 3, a pressing member 6, an airbag 7, a valve plate 9 and an air chamber are provided inside the cylinder 2. The eccentric wheel 3 is connected to the drive shaft of the motor 1. There are four airbags 7 and four pressing members 6 respectively. A steel needle 4 is installed on the eccentric wheel 3. The steel needle 4 is connected to a connecting rod 5. The four pressing members 6 are evenly distributed on the connecting rod 5. The pressing member 6 is connected to the airbag 7. Four air cavities 8 are provided inside the air chamber. The four air cavities 8 are connected through an air passage 10. An air inlet pipe 11 and an air outlet 12 are provided on the outer surface of the air chamber. The air inlet pipe 11 and the air outlet pipe 12 are connected to the air passage 10. A valve rod is provided on the valve plate 9. The valve plate 9 is arc-shaped. The valve plate 9 is arranged inside the air cavity 8. The valve rod passes through the airbag 7 and is connected to the pressing member 6. One valve plate 9 is arranged in one air cavity 8. The motor 1 drives the pressing member 6 to move up and down through the eccentric wheel 3. When the pressing member 6 moves down, it will squeeze the airbag 7, causing the airbag 7 to contract and deform, so that the volume changes. The gas is squeezed and transported downward. The valve plate also moves down. The valve plate and the air cavity are in interference contact and have sealing performance, forming a piston-type structure. The valve plate is driven by the pressing member to move up and down in the air cavity to complete air outlet and air inlet. A steel ball can also be provided at the steel needle to play a buffering role.

[0024] The cylinder 2 includes an upper cover 21, a middle cover 22 and a lower cover 23. The airbag 7 is fastened inside the middle cover 22. A fixing plate 13 is provided on the bottom surface of the middle cover 22. A number of air holes are provided at the position corresponding to the airbag 7 on the fixing plate 13. The valve rod passes through the fixing plate 13 and then enters the airbag 7. The air chamber 8 and the air passage 10 are arranged inside the lower cover 23. The pressing member 6 and the eccentric wheel 3 are located between the upper cover 21 and the middle cover 22. The upper cover 21, the middle cover 22 and the lower cover 23 are connected by bolts 14. The air inlet pipe 11 and the air outlet pipe 12 are arranged on the bottom surface of the lower cover. The motor 1 is connected to the upper cover 21. The gas in the airbag enters the air chamber through the air holes in the fixing plate, then flows into the air passage, and is discharged from the air outlet pipe.

[0025] The pressing member and the connecting rod are of an integrally formed structure.

[0026] The airbag 7 is in a tower-shaped structure. The airbag 7 includes an upper airbag 71 and a lower airbag 72. There is a partition plate 73 between the upper airbag 71 and the lower airbag 72. A through groove 74 is provided on the partition plate 73. The pressing member 6 is inserted into the upper airbag 71 and fixed. The lower airbag 72 is directly opposite to the air holes on the fixing plate 13. Both the upper airbag and the lower airbag are of an open structure, which is convenient for the circulation and transportation of gas.

[0027] The motor is tightly connected to the upper cover by screws, and the screws are inserted from the inside of the upper cover.

[0028] In the present utility model, by controlling the change of the volume of the airbag, an air pressure difference is generated, and the flow direction of air is controlled by the pressure difference. Specifically:

[0029] The motor 1 drives the eccentric wheel 3 to rotate. The eccentric wheel 3 drives the connecting rod 5 and the pressing member 6 to move up and down through the steel pin 4. When moving downward, the pressing member 6 presses the airbag 7, causing the volume of the airbag 7 to contract and become smaller. The gas in the airbag 7 is discharged from the lower airbag, flows through the air holes on the fixing plate 13 into the air chamber 8. As it continues to move downward, the pressing member 6 drives the valve plate 9 to move downward in the air chamber 8. Air enters the air passage 10 from the air chamber 8 and is discharged outward from the air passage 10 into the air outlet pipe 12. There are four airbags, so the gas flow rate is greater. At the same time, it is not a mechanical hard contact, reducing noise.

[0030] When the pressing member 6 moves upward, it drives the valve plate 9 to move upward, a negative pressure is formed in the air chamber 88, and the external air enters the air passage 10 through the air inlet pipe 11 and then enters the air chamber 8. As the gas increases and the pressure increases, the valve plate 9 is pushed upward, and the gas flows out of the air chamber, and then as it moves downward again, the gas is discharged from the air outlet again to complete inflation.

[0031] It should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A silent air pump, comprising a motor and a cylinder, wherein the motor is mounted on the cylinder, characterized in that: An eccentric wheel, an extrusion piece, an air bag, a valve sheet and an air chamber are provided in the cylinder. The eccentric wheel is connected to the driving shaft of the motor. There are four air bags and four extrusion pieces respectively. A steel needle is installed on the eccentric wheel, and the steel needle is connected to the connecting rod. Four extrusion pieces are evenly distributed on the connecting rod. The extrusion piece is connected to the air bag. Four air cavities are provided in the air chamber, and the four air cavities are connected through an air path. An air inlet pipe and an air outlet are provided on the outer surface of the air chamber, and the air inlet pipe and the air outlet pipe are connected with the air path. A valve stem is provided on the valve sheet, and the valve sheet is arc-shaped. The valve sheet is arranged in the air cavity. The valve stem passes through the air bag and is connected to the extrusion piece. One valve sheet is arranged in one air cavity, and the motor drives the extrusion piece to move up and down through the eccentric wheel.

2. The silent air pump according to claim 1, characterized in that: The cylinder includes an upper cover, a middle cover and a lower cover. The airbag is fastened in the middle cover. A fixing plate is provided on the bottom surface of the middle cover. A plurality of air holes are provided on the fixing plate at positions corresponding to the airbag. The valve stem passes through the fixing plate and then enters the airbag. The air cavity and the air path are arranged in the lower cover. The extrusion piece and the eccentric wheel are located between the upper cover and the middle cover. The upper cover, the middle cover and the lower cover are connected by bolts. The air inlet pipe and the air outlet pipe are arranged on the bottom surface of the lower cover. The motor is connected to the upper cover.

3. The silent air pump according to claim 2, characterized in that: The extrusion piece and the connecting rod are an integrally formed structure.

4. The silent air pump according to claim 1, characterized in that: The air bag is in a tower-shaped structure.

5. The silent air pump according to claim 2, characterized in that: The airbag comprises an upper airbag and a lower airbag, a partition is provided between the upper airbag and the lower airbag, a through groove is provided on the partition, an extrusion piece is inserted into the upper airbag and fastened, and the lower airbag faces the air hole of the fixing plate.

6. The silent air pump according to claim 2, characterized in that: The motor is locked and connected to the upper cover by screws, and the screws are installed from the inside of the upper cover.

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