Noise reduction device and backflow type noise reduction air pump thereof

Abstract

The utility model relates to a noise reduction device and a backflow type noise reduction air pump thereof, which are used for an air pump comprising a cover plate (11), a valve seat (12), a diaphragm device (13), a driving device (14) and an air tap (15) arranged on the cover plate (11), and are characterized in that a backflow cavity (20) is formed between the cover plate (11) and the valve seat (12) in a matching manner; the backflow cavity (20) comprises a plurality of airflow channel units (21) and a plurality of diaphragm air inlet units (22) which are distributed at intervals. The air flow retaining wall is arranged on the cover plate to separate the air flow, so that the echo noise of the air flow is reduced, and the noise reduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to a micro pump device, in particular to a diaphragm air pump with a reflux cavity, in particular to a noise reduction device and a reflux type noise reduction air pump. Background Art

[0002] Rotary diaphragm air pumps are widely used, such as in daily necessities such as cars and massage chairs. The user experience and the life of the pump are the key to improving the product grade to meet the user experience needs of quietness.

[0003] In view of the above problems, the present invention adopts the following technical solutions to improve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a noise reduction device and a reflux noise reduction air pump thereof, and the disclosed technical solution is as follows:

[0005] A noise reduction device, for an air pump comprising a cover plate (11), a valve seat (12), a diaphragm device (13), a drive device (14), and an air nozzle (15) arranged on the cover plate (11), characterized in that a reflux chamber (20) is formed between the cover plate (11) and the valve seat (12), the reflux chamber (20) comprising a plurality of airflow channel units (21) and a plurality of diaphragm air inlet units (22) which are distributed at intervals, a plurality of first airflow baffle walls (111) are arranged in the inner space of the cover plate (11), and a plurality of first airflow baffle walls (111) are arranged in the inner space of the valve seat (12). A plurality of second airflow baffles (121) are arranged between the valve seat (12), the first airflow baffle (111) and the second airflow baffle (121) are adapted to separate into the airflow channel unit (21) and the diaphragm air intake unit (22), the airflow channel unit (21) is provided with a fluid port (211), the diaphragm air intake unit (22) is provided with a diaphragm air intake port (221), the fluid port (211) and the diaphragm air intake port (221) are arranged on the inner plate surface of the valve seat (12), and are respectively used for the airflow reflux circulation of the pump intake and the air pump diaphragm to suck gas. The diaphragm pump with a noise reduction device in the utility model uses the upper cover plate for reflux to extend the gas circulation channel to achieve noise reduction, and also reduces the airflow echo noise by arranging the airflow baffle on the cover plate to separate the airflow structure.

[0006] Furthermore, the first airflow baffle wall (111) and the second airflow baffle wall (121) are arranged in a staggered manner, and the staggered gaps (23) between a pair of matched first airflow baffle walls (111) and second airflow baffle walls (121) form an airflow noise reduction channel. By staggered arrangement of the baffle walls, a gap is formed to connect the space between the airflow channel unit (21) and the diaphragm air intake unit (22), thereby extending the airflow conduction channel and buffering the flow rate of the airflow, thereby achieving a noise reduction effect.

[0007] Furthermore, a flow hole (24) is provided between the airflow channel unit (21) and the membrane air inlet unit (22). The noise reduction device forms airflow between all the airflow channel units (21) and the cavity of the membrane air inlet unit (22) of the reflux cavity (20) by providing the fluid through hole, thereby achieving balanced airflow pressure, easing airflow and reducing airflow noise.

[0008] Furthermore, the flow hole (23) is formed by a plurality of slots (1111) provided on the first airflow baffle wall (111), and a slot (1111) is provided in the middle of each first airflow baffle wall (111). The airflow baffle wall with slots and slots is designed to achieve balanced airflow buffering between each airflow channel unit (21) and the diaphragm air intake unit (22) in the reflux cavity (20). The airflow baffle wall also plays a role in buffering the airflow and avoids echo-like noise generated by the large airflow cavity.

[0009] Furthermore, the plurality of grooves and notches (1111) are arranged on the inner side of the cover plate (11) to form a first circular ring M with the center of the cover plate (11) as the center. The grooves and notches (1111) arranged in a circular ring shape form a circular airflow channel, which is more in line with the movement principle of airflow and buffers the rapid swirling noise of airflow.

[0010] Furthermore, it also includes a buffering protrusion (25) arranged in the diaphragm air inlet unit (22), the buffering protrusion (25) including a first protrusion (112) arranged on the inner periphery of the cover plate (11) and a second protrusion (122) arranged on the inner periphery of the valve seat (12), a plurality of the first protrusions (112) and the second protrusions (122) are relatively adapted and arranged in a second circular ring N with the center of the cover plate (11) as the center, and the radius of the first circular ring M arranged around the groove notch (1111) is smaller than the second circular ring N. The buffering protrusion reduces the backflow space of the inner cavity of the diaphragm air inlet unit (22) to buffer the airflow, and the buffering protrusion is arranged on the outer periphery, so as not to affect the circular circulation of the airflow of the fluid through hole (23) formed by the groove notch.

[0011] Furthermore, the end faces of the first convex column (112) and the second convex column (122) facing the center of the cover plate (11) and the outer edge of the groove notch (1111) are arranged on a circle with the same radius.

[0012] Furthermore, the facing arrangement forms a vertical sound-absorbing retaining wall.

[0013] Furthermore, the cross-sectional area of ​​the first protrusion (112) is greater than that of the second protrusion (122), and the first protrusion (112) is arranged as an inclined surface toward the central end surface. The cross-sectional area of ​​the first protrusion (112) is arranged to be three times that of the second protrusion (122), and at the butt joint, the excess part of the first protrusion (112) forms a reflux cavity with the inner side surface of the valve seat, which plays a role in noise reduction. The end surface of the first protrusion (112) is inclined, and a plurality of protrusion inclined surfaces surround the first ring M to form a circular reflux surface.

[0014] The utility model also discloses a reflux noise reduction air pump, comprising a cover plate (11), a valve seat (12), a diaphragm device (13), a driving device (14), and an air outlet (15) arranged on the cover plate (11), characterized in that it also comprises the noise reduction device (20) as described above, and further comprises an air inlet valve (123) installed on the valve seat (12), wherein the air inlet valve (123) is arranged on the diaphragm air inlet (221) of the diaphragm air inlet unit (22), and is used for the diaphragm bag air inlet one-way check function of the diaphragm device (13); while the cover plate (11) and the valve seat (12) are snapped together to form a reflux cavity for noise reduction, an air outlet cavity (30) is arranged in the center surrounded by the reflux cavity, and the air outlet cavity (30) is connected to the air outlet (15), and an air outlet through hole of the diaphragm bag is arranged on the valve seat (12), and an air outlet one-way valve (124) is arranged on the air outlet through hole.

[0015] According to the above technical scheme, the utility model has the following beneficial effects: the utility model is a noise reduction device and a reflux noise reduction air pump thereof, a reflux device is arranged on the cavity between the diaphragm air pump cover plate and the valve seat, the gas circulation channel is extended, and an airflow baffle is arranged on the cover plate to separate the airflow structure, thereby reducing the airflow echo noise and achieving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional schematic diagram of the overall structure of a noise reduction air pump according to the best embodiment of the utility model;

[0017] Figure 2 A schematic top view of an explosion of a noise reduction air pump according to the best embodiment of the utility model;

[0018] Figure 3 A bottom view schematic diagram of a noise reduction air pump explosion in the best embodiment of the utility model;

[0019] Figure 4 This is a diagonal cross-sectional view of the overall structure of the noise reduction air pump of the best embodiment of the utility model;

[0020] Figure 5 A schematic cross-sectional view of the overall structure of the noise reduction air pump according to the best embodiment of the utility model;

[0021] Figure 6This is an exploded schematic diagram of a noise reduction device for a noise reduction air pump according to the best embodiment of the utility model;

[0022] Figure 7 A three-dimensional schematic diagram of the overall structure of the noise reduction device of the best embodiment of the utility model;

[0023] Figure 8 It is a schematic exploded top view of the overall structure of the vacuum pump according to the second embodiment of the best embodiment of the utility model;

[0024] Fig. 9 This is an explosion diagram of the noise reduction device of the best embodiment of the utility model;

[0025] Fig.10 A front view schematic diagram of a noise reduction device according to a preferred embodiment of the utility model;

[0026] Fig.11 AA is a cross-sectional schematic diagram of the noise reduction device of the best embodiment of the utility model;

[0027] Fig.12 BB is a cross-sectional schematic diagram of the noise reduction device according to the best embodiment of the utility model. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Figures 1 to 12 As shown, a noise reduction device is used for an air pump comprising a cover plate 11, a valve seat 12, a diaphragm device 13, a drive device 14, and an air nozzle 15 arranged on the cover plate 11, such as Figure 2 The middle arrow indicates the direction of the airflow, and a reflux chamber 20 is formed between the cover plate 11 and the valve seat 12. The reflux chamber 20 includes a plurality of airflow channel units 21 and a plurality of diaphragm air intake units 22 that are spaced apart. A plurality of first airflow baffles 111 are provided in the inner space of the cover plate 11, and a plurality of second airflow baffles 121 are provided in the inner space of the valve seat 12. The first airflow baffles 111 and the second airflow baffles 121 are adapted to separate the airflow channel unit 21 and the diaphragm air intake unit 22. The airflow channel unit 21 is provided with a fluid port 211, and the diaphragm air intake unit 22 is provided with a diaphragm air intake port 221. The fluid port 211 and the diaphragm air intake port 221 are provided on the inner plate surface of the valve seat 12, and are used for the airflow reflux circulation of the pump intake and the air pump diaphragm to draw gas, respectively. In the noise reduction structure of the utility model, a reflux chamber is provided on the cover plate to extend the gas circulation channel to achieve noise reduction. At the same time, the airflow baffle is provided on the cover plate to separate the airflow structure, thereby reducing the airflow echo noise.

[0029] like Figures 6 to 12As shown, the first airflow baffle 111 and the second airflow baffle 121 are distributed in a staggered manner, and the staggered gap 23 between a pair of matching first airflow baffles 111 and second airflow baffles 121 forms an airflow noise reduction channel. Through the staggered arrangement of the baffles, a gap is formed to connect the space between the airflow channel unit 21 and the diaphragm air inlet unit 22, which not only extends the airflow conduction channel, but also buffers the flow rate of the airflow, thereby playing a role in noise reduction. A fluid through hole 24 is set between the airflow channel unit 21 and the diaphragm air inlet unit 22. The noise reduction device forms airflow circulation between all the airflow channel units 21 and the diaphragm air inlet unit 22 of the reflux cavity 20 through the setting of the fluid through hole, so as to achieve balanced airflow pressure, moderate airflow and reduce airflow noise. The fluid through hole 24 is formed by a plurality of groove notches 1111 set on the first airflow baffle 111, and a groove notch 1111 is set in the middle of each first airflow baffle 111. The design of the airflow retaining wall with grooves and notches realizes balanced airflow buffering between each airflow channel unit 21 and the diaphragm air inlet unit 22 in the reflux chamber 20. At the same time, the airflow retaining wall also plays a role in buffering the airflow and avoiding echo-like noise generated by the large-volume airflow chamber.

[0030] like Figure 7 As shown, a plurality of grooves and notches 1111 are arranged on the inner side of the cover plate 11 to form a first circular ring M with the center of the cover plate 11 as the center. The grooves and notches 1111 arranged in a circular shape form a circular airflow channel, which is more in line with the movement principle of airflow and buffers the noise of rapid swirl of airflow. It also includes a buffer boss 25 arranged in the diaphragm air inlet unit 22, and the buffer boss 25 includes a first boss 112 arranged on the inner periphery of the cover plate 11 and a second boss 122 arranged on the inner periphery of the valve seat 12. A plurality of first bosses 112 and second bosses 122 are relatively adapted to be arranged in a second circular ring N with the center of the cover plate 11 as the center. The radius of the first circular ring M arranged around the grooves and notches 1111 is smaller than that of the second circular ring N. The buffer boss reduces the reflux space of the inner cavity of the diaphragm air inlet unit 22 to buffer the airflow. Moreover, the buffer boss is arranged at a more peripheral portion, which does not affect the circular circulation of the airflow in the fluid through hole 23 formed by the grooves and notches.

[0031] like Figure 6 As shown in the figure, the end faces of the first convex column 112 and the second convex column 122 facing the center of the cover plate 11 and the outer edge of the groove notch 1111 are arranged on a circle with the same radius. The first convex column 112 can be set as an oblique opening.

[0032] The first protrusion 112 and the second protrusion 122 are arranged opposite to each other to form a vertical soundproofing barrier. The cross-sectional area of ​​the first protrusion 112 is larger than that of the second protrusion 122, and the first protrusion 112 is arranged as an inclined surface toward the central end face. The cross-sectional area of ​​the first protrusion 112 is arranged to be three times that of the second protrusion 122. At the docking part, the excess part of the first protrusion 112 forms a reflux cavity with the inner side of the valve seat, which plays a role in noise reduction. The end face of the first protrusion 112 is inclined, and multiple protrusion inclined surfaces surround the first ring M to form a circular reflux surface.

[0033] like Figures 1 to 3 As shown, the utility model also discloses a reflux noise reduction air pump, including a cover plate 11, a valve seat 12, a diaphragm device 13, a driving device 14, and an air outlet 15 arranged on the cover plate 11, and the noise reduction device 20 also includes an air inlet valve 123 installed on the valve seat 12, and the air inlet valve 123 is arranged on the diaphragm air inlet port 221 of the diaphragm air inlet unit 22, and is used for the diaphragm bag air inlet one-way check function of the diaphragm device 13; while the cover plate 11 and the valve seat 12 are buckled to form a reflux cavity for noise reduction, an air outlet cavity 30 is arranged in the center surrounded by the reflux cavity, and the air outlet cavity 30 is connected to the air outlet 15, and an air outlet through hole of the diaphragm bag is arranged on the valve seat 12, and an air outlet one-way valve 124 is arranged in the air outlet through hole.

[0034] like Figure 2 and Figure 3 As shown, the diaphragm pump 10 also includes an air inlet valve 123 mounted on the valve seat 12, and the air inlet valve 123 is arranged on the diaphragm air inlet port 221 of the diaphragm air inlet unit 22, and is used for the one-way check function of the diaphragm bag air inlet of the diaphragm device 13; while the cover plate 11 and the valve seat 12 are buckled together to form a noise-reducing reflux cavity, an air outlet cavity 30 is arranged in the center surrounded by the reflux cavity, and the air outlet cavity 30 is connected to the air outlet port 15, and an air outlet through hole of the diaphragm bag is arranged on the valve seat 12, and an air outlet check valve 124 is arranged in the air outlet through hole. The pump head structure composed of the cover plate 11, the valve device 12, and the diaphragm device 13 is buckled and fixed by the buckle 17, and the screw 18 fixes the fixed drive device 14.

[0035] The above is one embodiment of the present utility model. In addition, it should be noted that any equivalent or simple changes made based on the structure, features and principles described in the concept of this patent are included in the protection scope of this patent.

Claims

1. A noise reduction device, characterized in that A reflux chamber (20) is formed between the cover plate (11) and the valve seat (12), and the reflux chamber (20) includes a plurality of airflow channel units (21) and a plurality of diaphragm air inlet units (22) that are spaced apart from each other. A plurality of first airflow baffles (111) are arranged in the inner space of the cover plate (11), and a plurality of second airflow baffles (121) are arranged in the inner space of the valve seat (12). The first airflow baffles (111) and the second airflow baffles (121) are adapted to separate the airflow channel unit (21) and the diaphragm air inlet unit (22). The airflow channel unit (21) is provided with a fluid port (211), and the diaphragm air inlet unit (22) is provided with a diaphragm air inlet (221). The fluid port (211) and the diaphragm air inlet (221) are arranged on the inner plate surface of the valve seat (12), and are used for the airflow reflux of the pump intake and the air pump diaphragm to suck gas, respectively.

2. A noise reduction device according to claim 1, characterized in that The first airflow baffle wall (111) and the second airflow baffle wall (121) are distributed in a staggered manner, and a staggered gap (23) between a pair of matched first airflow baffle walls (111) and second airflow baffle walls (121) forms an airflow noise reduction channel.

3. A noise reduction device according to claim 1, characterized in that A flow hole (24) is provided between the airflow channel unit (21) and the diaphragm air inlet unit (22).

4. A noise reduction device according to claim 3, characterized in that The flow hole (24) is formed by a plurality of slots (1111) arranged on the first airflow baffle wall (111), and a slot (1111) is arranged in the middle of each first airflow baffle wall (111).

5. A noise reduction device according to claim 4, characterized in that The plurality of grooves and notches (1111) are arranged on the inner side surface of the cover plate (11) to form a first circular ring M with the center of the cover plate (11) as the center.

6. A noise reduction device according to claim 5, characterized in that It also includes a buffer boss (25) arranged in the diaphragm air inlet unit (22), and the buffer boss (25) includes a first boss (112) arranged on the inner periphery of the cover plate (11) and a second boss (122) arranged on the inner periphery of the valve seat (12), and a plurality of the first bosses (112) and the second bosses (122) are relatively adapted to be arranged in a second circular ring N with the center of the cover plate (11) as the center of the circle, and the radius of the first circular ring M arranged around the groove notch (1111) is smaller than the radius of the second circular ring N.

7. A noise reduction device according to claim 6, characterized in that The end surfaces of the first convex column (112) and the second convex column (122) facing the center of the cover plate (11) and the outer edge of the groove notch (1111) are arranged on a circle with the same radius.

8. A noise reduction device according to claim 7, characterized in that The first convex column (112) and the second convex column (122) are arranged opposite to each other to form a vertical sound-absorbing baffle wall.

9. A noise reduction device according to claim 8, characterized in that The cross-sectional area of ​​the first convex column (112) is larger than that of the second convex column (122), and the first convex column (112) is arranged as an inclined surface toward the central end surface.

10. A reflux noise reduction air pump, comprising a cover plate (11), a valve seat (12), a diaphragm device (13), a drive device (14), and an air outlet (15) arranged on the cover plate (11), characterized in that It also includes a noise reduction device as claimed in any one of claims 1 to 9, which also includes an air inlet valve (123) installed on the valve seat (12), and the air inlet valve (123) is arranged on the diaphragm air inlet port (221) of the diaphragm air inlet unit (22), and is used for the diaphragm bag air inlet one-way check function of the diaphragm device (13); while the cover plate (11) and the valve seat (12) are snapped together to form a reflux chamber for noise reduction, an air outlet chamber (30) is arranged in the center surrounded by the reflux chamber, and the air outlet chamber (30) is connected to the air outlet port (15), and an air outlet hole of the diaphragm bag is arranged on the valve seat (12), and an air outlet check valve (124) is arranged on the air outlet hole.

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