Micro vacuum air pump

Abstract

An embodiment of the present invention provides a micro vacuum air pump, comprising a driving member; an air collecting assembly driven by the driving member, the air collecting assembly comprising a housing with a first air outlet at an end away from the driving member; and an end cap sealed and assembled to the outside of the end of the housing with the first air outlet, the end cap being provided with an air inlet nozzle sealedly connected to the inner cavity of the housing of the air collecting assembly; an exhaust hole being provided on the housing, the micro vacuum pump further comprising a sound insulation plate with a sealing cover covering the first air outlet on the housing and a second air outlet, and a sound insulation valve with a sealing cover covering the second air outlet on the sound insulation plate and a third air outlet, the sound insulation plate and the sound insulation valve being both provided in the space between the housing and the end cap and dividing the space into multiple noise reduction chambers connected in sequence, the multiple noise reduction chambers being connected to the first air outlet for air intake and to the exhaust hole for exhaust. The multiple noise reduction chambers extend the exhaust air path of the air pump, thereby reducing the noise generated by the air pump and simultaneously cooling the driving member.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of air pumps, and in particular to a micro vacuum air pump. Background Art

[0002] A vacuum air pump is a device that extracts air from a container, creating a vacuum. Many small devices, such as breast pumps, are equipped with miniature vacuum air pumps for vacuuming. Currently, the miniature vacuum air pumps on the market generate a lot of noise during use, seriously affecting the user experience. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a micro vacuum air pump that can reduce the noise generated during operation.

[0004] To solve the above technical problems, the embodiment of the present invention adopts the following technical solution: a micro vacuum air pump, comprising:

[0005] driving parts;

[0006] an air collecting assembly docked with the driving member and driven by the driving member, the air collecting assembly comprising a housing having a first air outlet at an end away from the driving member; and

[0007] An end cap is sealably assembled on the exterior of one end of the housing provided with the first air outlet, the end cap being provided with an air inlet nozzle sealably connected to the inner cavity of the housing of the gas collecting assembly;

[0008] An exhaust hole is provided on the shell, and the micro vacuum pump also includes a sealing cover covering the first exhaust hole on the shell and a sound insulation board with a second exhaust hole, and a sealing cover covering the second exhaust hole on the sound insulation board and a sound insulation valve with a third exhaust hole. The sound insulation board and the sound insulation valve are both arranged in the space between the shell and the end cover and divide the space into a first-level noise reduction chamber, a second-level noise reduction chamber and a third-level noise reduction chamber that are connected in sequence, wherein the first-level noise reduction chamber is also connected to the first exhaust hole, and the third-level noise reduction chamber is also connected to the exhaust hole through an exhaust channel.

[0009] Furthermore, the side edge of the sound insulation board is bent and extends toward the gas collecting assembly to form a first side wall with a first predetermined height, and the end of the first side wall is pressed against the outer shell. The sound insulation board, the first side wall and the outer shell together form the first-level noise reduction chamber.

[0010] Furthermore, the sound insulation valve includes a cylinder and a valve plate assembled in the middle section of the cylinder, the two ends of the cylinder are respectively pressed against the sound insulation board and the end cover, and the cylinder, the valve plate and the sound insulation board together form the secondary noise reduction chamber; the cylinder, the valve plate and the end cover together form the secondary noise reduction chamber; the cylinder wall between the valve plate and the end cover is provided with a fourth air outlet connected to the inlet end of the exhaust channel.

[0011] Furthermore, the third air outlet is provided on the valve plate, and the third air outlet is a normally closed air outlet that is opened only when the gas pressure on the incoming gas side exceeds a preset value.

[0012] Furthermore, a mounting groove arranged around the second air outlet is provided on a side of the sound insulation plate facing the sound insulation valve, and the corresponding end of the cylinder is inserted into the mounting groove.

[0013] Furthermore, the end surface of the shell that is opposite to the driving member is also recessed toward the interior of the shell to form at least one concave cavity connected to the outlet end of the exhaust channel, and the concave cavity and the end surface of the driving member that is docked with the shell cooperate to form a four-stage noise reduction chamber, and the side wall of each of the concave cavities is also provided with at least one exhaust hole.

[0014] Furthermore, the projection area of ​​the cavity on the end surface of the butt joint end of the driving member accounts for no less than 40 percent of the area of ​​the end surface of the butt joint end of the driving member.

[0015] Furthermore, the exhaust channel includes a main channel opened in the side wall of the shell and isolated from the inner cavity of the shell, and a connecting section formed between the end cover and the sound insulation board and connected to the main channel. The connecting section serves as the inlet end of the exhaust channel and is connected to the third noise reduction chamber.

[0016] Furthermore, an output shaft is provided at one end where the driving member is assembled with the housing, and an axial hole is provided in the middle of the end face of the housing opposite to the driving member. The output shaft of the driving member extends into the housing through the axial hole, and a shaft seal is also provided in the axial hole and is sleeved on the output shaft.

[0017] The cam is connected to the valve body through the cam, and the cam is connected to the valve body by the cam, so that the cam can be connected to the valve body by the cam, thereby preventing the cam from leaking out.

[0018] By adopting the above technical solution, the embodiment of the present invention has at least the following beneficial effects: the embodiment of the present invention divides the space between the outer shell and the inner wall of the end cover into multiple noise reduction chambers by arranging a sound insulation board and a sound insulation valve, including at least a first-level noise reduction chamber formed between the sound insulation board and the outer shell, a second-level noise reduction chamber formed between the sound insulation board and the sound insulation valve, and a third-level noise reduction chamber formed between the inner wall of the end cover and the sound insulation board and the sound insulation valve. The gas input from the gas collecting assembly passes through the first-level noise reduction chamber, the second-level noise reduction chamber, and the third-level noise reduction chamber in sequence before being discharged through the exhaust hole, effectively improving the exhaust structure of the air pump, extending the exhaust gas path, and reducing the noise generated when the air pump is working. At the same time, the provision of the sound insulation board and the sound insulation valve also compresses the space between the outer shell and the inner wall of the end cover, ensuring the vacuum suction volume of the air pump, making the air pump more stable when working. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an optional embodiment of the micro vacuum air pump of the present invention.

[0020] Figure 2 It is a schematic three-dimensional structural diagram of a disassembled state of an optional embodiment of the micro vacuum air pump of the present invention.

[0021] Figure 3 It is a schematic structural diagram of a sound insulation board in another optional embodiment of the micro vacuum air pump of the present invention.

[0022] Figure 4 It is a structural schematic diagram of a sound insulation valve in another optional embodiment of the micro vacuum air pump of the present invention.

[0023] Figure 5 It is a structural schematic diagram of the bottom shell in another optional embodiment of the micro vacuum air pump of the present invention.

[0024] Figure 6It is a structural schematic diagram of a valve plate in another optional embodiment of the micro vacuum air pump of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. Moreover, the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0026] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] like Figure 1-Figure 2 As shown, an optional embodiment of the present invention provides a micro vacuum air pump, comprising:

[0028] Driving member 1;

[0029] A gas collecting assembly docked with the driving member 1 and driven by the driving member 1, the gas collecting assembly comprising a housing 21 with a first gas outlet 210 formed at an end away from the driving member 1; and

[0030] An end cap 3 is sealed and assembled on the outside of one end of the housing 21 provided with the first air outlet 210. The end cap 3 is provided with an air inlet nozzle 31 which is in sealed communication with the inner cavity 211 of the housing 21 of the gas collecting assembly.

[0031] An exhaust hole 212 is provided on the shell 21, and the micro vacuum pump also includes a sound insulation board 4 with a sealing cover covering the first exhaust hole 210 on the shell 21 and a second exhaust hole 41, and a sound insulation valve 5 with a sealing cover covering the second exhaust hole 41 on the sound insulation board 4 and a third exhaust hole 51. The sound insulation board 4 and the sound insulation valve 5 are both arranged in the space between the shell 21 and the end cover 3 and divide the space into a first-level noise reduction chamber 61, a second-level noise reduction chamber 62 and a third-level noise reduction chamber 63 that are connected in sequence, wherein the first-level noise reduction chamber 61 is also connected to the first exhaust hole 210, and the third-level noise reduction chamber 63 is also connected to the exhaust hole 212 through the exhaust channel 7.

[0032] In the embodiment of the present invention, a sound insulation board 4 and a sound insulation valve 5 are provided to divide the space between the outer shell 21 and the inner wall of the end cover 3 into multiple noise reduction chambers, including at least a first-level noise reduction chamber 61 formed between the sound insulation board 4 and the outer shell 21, a second-level noise reduction chamber 62 formed between the sound insulation board 4 and the sound insulation valve 5, and a third-level noise reduction chamber 63 formed between the inner wall of the end cover 3 and the sound insulation board 4 and the sound insulation valve 5. The gas input from the gas collecting assembly passes through the first-level noise reduction chamber 61, the second-level noise reduction chamber 62, and the third-level noise reduction chamber 63 in sequence before being discharged through the exhaust hole 212, effectively improving the exhaust structure of the air pump, extending the exhaust gas path, and reducing the noise generated when the air pump is working. At the same time, the provision of the sound insulation board 4 and the sound insulation valve 5 also compresses the space between the outer shell 21 and the inner wall of the end cover 3, ensuring the vacuum suction volume of the air pump and making the air pump more stable when working.

[0033] In another optional embodiment of the present invention, Figure 1 and Figure 3 and Figure 4 As shown, the side edge of the sound insulation board 4 is bent and extends toward the gas collecting assembly to form a first side wall 42 with a first predetermined height. The end of the first side wall 42 is pressed against the outer shell 21. The sound insulation board 4, the first side wall 42 and the outer shell 21 together form a first-level noise reduction chamber 61.

[0034] In this embodiment, the first side wall 42 is provided to cooperate with the sound insulation board 4 and the outer shell 21 to form a first-level noise reduction chamber 61. At the same time, the first side wall 42 can also support the sound insulation board 4 on the outer shell 21; the first side wall 42 abuts against the inner wall of the end cover 3, so that the sound insulation board 4 can be fixed in the end cover 3 and the sound insulation board 4 will not move when the air pump is working, thereby improving the stability of the micro vacuum air pump during operation.

[0035] In another optional embodiment of the present invention, Figure 1 and Figure 3 As shown, the sound insulation valve 5 includes a cylinder 52 and a valve disc 53 assembled in the middle section of the cylinder 52. The two ends of the cylinder 52 are respectively pressed against the sound insulation board 4 and the end cover 3. The cylinder 52, the valve disc 53 and the sound insulation board 4 together form a secondary noise reduction chamber 62; the cylinder 52, the valve disc 53 and the end cover 3 together form a secondary noise reduction chamber 62; the cylinder wall of the cylinder 52 between the valve disc 53 and the end cover 3 is provided with a fourth air outlet 54 connected to the inlet end of the exhaust channel 7.

[0036] In this embodiment, the cylinder 52 is supported and fixed between the sound insulation board 4 and the end cover 3 by pressing the two ends of the cylinder 52 against the sound insulation board 4 and the end cover 3 respectively.

[0037] In another optional embodiment of the present invention, Figure 1 and Figure 4 As shown, the third air outlet 51 is formed on the valve plate 53 , and the third air outlet 51 is a normally closed air outlet that opens only when the gas pressure on the incoming gas side exceeds a preset value.

[0038] In this embodiment, the third air outlet 51 is formed using a normally closed air outlet. When the air pressure reaches a predetermined value, it responsively opens and flows through, ensuring a smooth exhaust path. When the air pressure is lower, it automatically closes, effectively preventing unnecessary air leakage. In practice, the valve plate 53 in this embodiment can be made of an elastic material. A slit is formed in the valve plate 53 to form the third air outlet 51. When the air pressure is low, the slit closes due to the elastic force of the elastic material. When the air pressure reaches a predetermined value, the valve plate 53 undergoes sufficient elastic deformation, allowing the third air outlet 51 to open and flow through.

[0039] In another optional embodiment of the present invention, Figure 2-Figure 4 As shown, the side of the sound insulation plate 4 facing the sound insulation valve 5 is provided with a mounting groove 43 arranged around the second air outlet 41, and the corresponding end of the cylinder 52 is inserted into the mounting groove 43, which effectively fixes the sound insulation valve 5 and improves the stability of the micro vacuum air pump during operation.

[0040] In another optional embodiment of the present invention, Figure 1 、 Figure 2 and Figure 5 As shown, the end surface of the shell 21 opposite to the driving member 1 is also recessed toward the interior of the shell 21 to form at least one concave cavity 213 connected to the outlet end of the exhaust channel 7. The concave cavity 213 cooperates with the end surface of the driving member 1 that is docked with the shell 21 to form a four-stage noise reduction chamber 64. The side wall of each concave cavity 213 is also provided with at least one exhaust hole 212.

[0041] In this embodiment, a fourth-stage noise reduction chamber 64 is added which is connected to the exhaust hole 212 and the exhaust channel 7 respectively. The gas enters the inner cavity 211 of the outer shell 21 from the air inlet nozzle 31 on the top of the end cover 3, enters the first-stage noise reduction chamber 61 through the first air outlet 210, and enters the fourth-stage noise reduction chamber 64 through the second-stage noise reduction chamber 62, the third-stage noise reduction chamber 63, and the exhaust channel 7 in turn, and is discharged through the exhaust hole 212, forming an "N"-shaped air path, which extends the exhaust air path of the micro vacuum air pump and reduces the noise generated when the micro vacuum air pump is working.

[0042] The multiple concave cavities 213 are connected through the communication channels 218 .

[0043] On the other hand, since the fourth-stage noise reduction chamber 64 is formed by the cooperation of the concave cavity 213, the driving part 1 and the outer shell 21, the gas will contact the shell of the driving part 1 when passing through the fourth-stage noise reduction chamber 64, taking away part of the heat generated by the driving part 1 during operation, thereby playing a role in heat dissipation.

[0044] In another optional embodiment of the present invention, Figure 1 and Figure 5As shown, the projection area of ​​the cavity 213 on the end face of the driver 1 accounts for no less than 40% of the end face area of ​​the driver 1, which can effectively ensure that the gas is in full contact with the housing of the driver 1 and ensure the heat dissipation effect.

[0045] In another optional embodiment of the present invention, Figure 5 As shown, the exhaust channel 7 includes a main channel 71 opened in the side wall of the shell 21 and isolated from the inner cavity 211 of the shell 21, and a connecting section 72 formed between the end cover 3 and the sound insulation board 4 and connected to the main channel 71. The connecting section 72 serves as the inlet end of the exhaust channel 7 and is connected to the third-stage noise reduction chamber 63, effectively connecting the third-stage noise reduction chamber 63 and the fourth-stage noise reduction chamber 64, while extending the exhaust gas path.

[0046] In another optional embodiment of the present invention, Figure 1-Figure 2 As shown, an output shaft 11 is provided at one end where the driving member 1 is assembled with the housing 21, and an axial hole 214 is provided in the middle of the end face of the housing 21 that is opposite to the driving member 1. The output shaft 11 of the driving member 1 passes through the axial hole 214 and extends into the housing 21. A shaft seal 12 is also provided in the axial hole 214 and is sleeved on the output shaft 11, which effectively ensures the vacuum degree of the micro vacuum air pump and improves the stability of the vacuum air pump during use.

[0047] In another optional embodiment of the present invention, Figure 1 、 Figure 2 and Figure 5 As shown, the gas collecting assembly includes a bottom shell 215, a leather cup 241 bracket 216 and a valve plate 217 which are sequentially connected to form the outer shell 21. The outer end of the bottom shell 215 is connected to the driving member 1. The valve plate 217 is provided with a first air outlet 210. The gas collecting assembly also includes an eccentric wheel 22 arranged in the bottom shell 215 and fixed on the output shaft 11 of the driving member 1, a swing frame 23 which is obliquely inserted at the end of the eccentric wheel 22 away from the driving member 1 and has a plurality of driving cylinders 231, a diaphragm element 24 assembled on the leather cup 241 bracket 216 and having a plurality of leather cups 241, and a first air outlet 210 inserted on the valve plate 217 and used to cooperate with the leather cup 241. The umbrella tack 25 is provided, and each driving cylinder 231 of the swing frame 23 is inserted into one end of each leather cup 241 of the diaphragm element 24 in a one-to-one correspondence. The portion of the valve plate 217 facing the swing frame 23 corresponding to each leather cup 241 is a slope 2170, and each slope 2170 is provided with a first air outlet 210. Each slope 2170 is parallel to the end face of the leather cup 241 when the driving cylinder 231 of the swing frame 23 drives the corresponding leather cup 241 to move toward the valve plate 217 to the maximum stroke. This can maximize the compression between the leather cup 241 and the valve plate 217 when the driving cylinder 231 drives the corresponding leather cup 241 to move toward the valve plate 217, thereby improving the exhaust efficiency and the air intake efficiency.

[0048] The working principle of the embodiment of the present invention is as follows: the driving member 1 drives the eccentric wheel 22 to rotate and then drives the swing frame 23 to rotate eccentrically. When inhaling, the driving cylinder 231 moves downward, and the space between the driving cylinder 231, the leather cup 241 and the valve plate 217 increases. The gas enters the inner cavity 211 from the vacuum container through the air inlet nozzle 31 and then enters the space between the driving cylinder 231, the leather cup 241 and the valve plate 217; when exhausting, the driving cylinder 231 moves upward, and the space between the driving cylinder 231, the leather cup 241 and the valve plate 217 decreases. The gas is discharged into the first noise reduction chamber 61 through the first air outlet 210, and is discharged through the second noise reduction chamber 62, the third noise reduction chamber 63, the exhaust channel 7, the fourth noise reduction chamber 64 and the exhaust hole 212 in turn.

[0049] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A micro vacuum air pump comprising: driving parts; an air collecting assembly docked with the driving member and driven by the driving member, the air collecting assembly comprising a housing having a first air outlet at an end away from the driving member; and An end cap is sealably assembled on the exterior of one end of the housing provided with the first air outlet, the end cap being provided with an air inlet nozzle sealably connected to the inner cavity of the housing of the gas collecting assembly; The invention is characterized in that an exhaust hole is opened at one end of the shell adjacent to the driving member, and the micro vacuum air pump further comprises a sound insulation plate with a sealing cover covering the first air outlet on the shell and having a second air outlet, and a sound insulation valve with a sealing cover covering the second air outlet on the sound insulation plate and having a third air outlet. The sound insulation plate and the sound insulation valve are both arranged in the space between the shell and the end cover and divide the space into a first-stage noise reduction chamber, a second-stage noise reduction chamber and a third-stage noise reduction chamber that are connected in sequence, wherein the first-stage noise reduction chamber is also connected to the first air outlet, and the third-stage noise reduction chamber is also connected to the exhaust hole through an exhaust channel; the sound insulation valve comprises a cylinder and a valve plate assembled in the middle section of the cylinder, the two ends of the cylinder respectively press against the sound insulation plate and the end cover, the cylinder, the valve plate, the sound insulation plate and the end cover together form the second air reduction chamber; the cylinder wall between the valve plate and the end cover is provided with a fourth air outlet connected to the inlet end of the exhaust channel.

2. The micro vacuum air pump according to claim 1, wherein The side edge of the sound insulation board is bent and extends toward the gas collecting assembly to form a first side wall with a first predetermined height. The end of the first side wall is pressed against the outer shell. The sound insulation board, the first side wall and the outer shell together form the first-level noise reduction chamber.

3. The micro vacuum air pump according to claim 1, wherein The third air outlet is formed on the valve plate, and is a normally closed air outlet that opens only when the gas pressure on the incoming gas side exceeds a preset value.

4. The micro vacuum air pump according to claim 1, wherein A mounting groove is provided on a side of the sound insulation plate facing the sound insulation valve, which is arranged around the second air outlet, and the corresponding end of the cylinder is inserted into the mounting groove.

5. The micro vacuum air pump according to claim 1, wherein The end surface of the shell that is opposite to the driving member is also recessed toward the interior of the shell to form at least one concave cavity connected to the outlet end of the exhaust channel. The concave cavity and the end surface of the driving member that is docked with the shell cooperate to form a four-stage noise reduction chamber. The side wall of each of the concave cavities is also provided with at least one exhaust hole.

6. The micro vacuum air pump according to claim 5, wherein: The proportion of the projection area of ​​the cavity on the end surface of the driving member's butt joint end to the end surface area of ​​the driving member's butt joint end is not less than 40 percent.

7. The micro vacuum air pump according to claim 1 or 5, characterized in that: The exhaust channel includes a main channel opened in the side wall of the shell and isolated from the inner cavity of the shell, and a connecting section formed between the end cover and the sound insulation board and connected to the main channel. The connecting section serves as the inlet end of the exhaust channel and is connected to the three-stage noise reduction chamber.

8. The micro vacuum air pump according to claim 1, wherein: An output shaft is provided at one end where the driving member is assembled with the housing, and an axial hole is provided in the middle of the end face of the housing opposite to the driving member. The output shaft of the driving member extends into the housing through the axial hole, and a shaft seal is also provided in the axial hole and is sleeved on the output shaft.

9. The micro vacuum air pump according to claim 1 or 8, characterized in that: The cam is connected to the valve body through the cam, and the cam is connected to the valve body by the cam, so that the cam can be connected to the valve body through the cam.

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