Vacuum pumping efficiency enhancement mechanism, pushing and tightening structure for preventing dust and debris from flowing back, and vacuum cleaner

Abstract

The present invention relates to the technical field of vacuum cleaners, and specifically discloses a vacuum pumping efficiency enhancement mechanism, a pushing and tightening structure for preventing dust and debris from flowing back, and a vacuum cleaner. The vacuum pumping efficiency enhancement mechanism of the present invention includes: at least one vacuum pumping efficiency enhancement part, the vacuum pumping efficiency enhancement part has a first opening and a second opening, the first opening and the second opening are respectively arranged near two mutually remote ends of the vacuum pumping efficiency enhancement part, and the inner diameter of the middle region of the vacuum pumping efficiency enhancement part is greater than the inner diameters of its two mutually remote ends; the second opening communicates with the second vacuum chamber, the second vacuum chamber has a chamber wall, and a closed space is formed by the chamber wall and / or a third structural member. The present invention uses the vacuum pumping efficiency enhancement part to increase the flow rate and velocity of gas during vacuuming, and can effectively reduce the power consumption of the vacuum pumping drive source at the same time, and uses the second vacuum chamber to form an effect of vacuum degree aggregation, and the vacuum pumping efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum cleaners, and particularly to a vacuum pumping efficiency enhancing mechanism, a pushing and tightening structure for preventing dust from flowing back, and a vacuum cleaner. Background Art

[0002] In a vacuum cleaner or other equipment that requires vacuum pumping, the efficiency of vacuum pumping of the equipment directly has an important impact on the working effect. Generally, in order to achieve the effect of improving the vacuum suction, it is mostly achieved by improving the efficiency of the driving motor. However, this will cause relatively large energy consumption and is not conducive to improving the battery life of rechargeable equipment. Therefore, how to improve the vacuum pumping efficiency of the equipment under the condition of low power consumption is a key issue.

[0003] In a vacuum cleaner, dust is usually blocked and collected in a dust cup communicated with a dust suction pipe. In order to prevent the dust in the dust cup from leaking out when the vacuuming stops, a dust-preventing reflux door that can automatically reset and close is provided at the dust suction port of the dust cup communicating with the dust suction pipe. The commonly used dust-preventing reflux door in the industry is a door body made of rubber or other elastic materials. When the vacuuming motor performs vacuum pumping, the dust-preventing reflux door can be opened under the action of the vacuum suction, and after the vacuuming stops, the dust-preventing reflux door can automatically reset and close.

[0004] However, when the dust-preventing reflux door and the dust suction port are blocked by dust or sundries, etc., the door body cannot be completely closed only relying on the restoring force of the dust-preventing reflux door itself, and dust leakage and other situations will occur. Summary of the Invention

[0005] In order to solve the above technical problems, one of the purposes of the present invention is to provide a vacuum pumping efficiency enhancing mechanism that cooperates with a vacuum pumping drive source to achieve vacuum pumping. It includes: at least one vacuum pumping efficiency enhancing part for increasing the air flow velocity and flow rate during vacuum pumping. The vacuum pumping efficiency enhancing part has a first opening and a second opening, and the first opening and the second opening are respectively arranged near two mutually distant ends of the vacuum pumping efficiency enhancing part. The first opening is located at one end close to the suction port of the vacuum pumping drive source, and the inner diameter of the middle region of the vacuum pumping efficiency enhancing part is larger than the inner diameters of its two mutually distant end regions; a vacuum chamber, the vacuum chamber includes a first vacuum chamber and a second vacuum chamber, and the second opening communicates with the second vacuum chamber. The second vacuum chamber has a chamber wall, and a closed space is formed by the chamber wall and / or a third structural member. The first opening communicates with the suction port of the vacuum pumping drive source.

[0006] The vacuum pumping efficiency enhancing mechanism of the present invention has the following beneficial effects:

[0007] ①In this application, by setting the first opening to be smaller than the inner diameter of the middle region of the vacuum pumping efficiency enhancement part, the flow rate increases during vacuum pumping, resulting in an increased suction force for vacuum pumping, thereby enhancing the "hardness" of the suction air of the vacuum pumping device. By setting the inner diameter of the middle region of the vacuum pumping efficiency enhancement part to be larger, the air flow rate increases and the air flow resistance is smaller, providing a structural basis for increasing the air flow rate passing through the first opening during vacuum pumping. By setting the second opening to be smaller than the inner diameter of the middle region of the vacuum pumping efficiency enhancement part and connecting the second opening to the second vacuum chamber, the flow rate of the vacuum pumping air flow can be rapidly increased during vacuum pumping.

[0008] Therefore, in this application, by setting the vacuum pumping efficiency enhancement part and configuring it such that the inner diameter of the middle region is larger than the inner diameters of the two mutually distant end parts, that is, forming a structure with small ends and a "big belly", the air in the second vacuum chamber enters the suction port successively through the second opening, the middle region of the vacuum pumping efficiency enhancement part, and the first opening. Both the air flow rate and the flow velocity are significantly increased, effectively enhancing the vacuum pumping force of the vacuum pumping device.

[0009] ②Based on the existing vacuum chamber having only one first vacuum chamber, this application additionally provides a second vacuum chamber, and the second opening of each vacuum pumping efficiency enhancement part is connected to the second vacuum chamber. Therefore, sufficient space and conditions can be provided for increasing the air flow rate during vacuum pumping, and the load on the driving power supply can be released to a certain extent, without keeping the driving power supply in a high-load state for a long time. As a result, the energy consumption during vacuum pumping is reduced, and a greater suction force can be formed under the same driving source power, further enhancing the suction efficiency during vacuum pumping under the action of the second vacuum chamber.

[0010] ③Since the suction forces formed by each vacuum pumping efficiency enhancement part at the first opening are not exactly the same (varying according to the size of the second opening, the volume of the vacuum pumping efficiency enhancement part, or the size of the first opening and the degree of being blocked by foreign objects), during vacuum pumping, the suction force formed at a certain first opening is greater than that at other first openings. Thus, the main force point of the air vortex is formed at the first opening with the largest suction force, affecting the air flow at other first openings and further naturally forming an air vortex in the first vacuum chamber. At the same time, an air vortex is also formed in the second vacuum chamber under the action of the air flow, thereby further increasing the vacuum pumping efficiency of the vacuum pumping efficiency enhancement mechanism of the present invention.

[0011] ④The first opening of the vacuum pumping enhancement part of the present application is the only gas inlet and outlet of the second vacuum chamber. When the vacuum pumping enhancement mechanism of the present invention is used in a vacuum cleaner, after the vacuum cleaner stops the dust suction operation, the negative pressure space inside the vacuum cleaner is quickly filled with external air (commonly known as the "breaking vacuum" state). At this time, due to the relatively large volume of the second vacuum chamber, and at the same time, in the presence of the second vacuum chamber and each vacuum pumping enhancement part arranged therein, a greater force for breaking the vacuum is formed, and the air flow direction is towards the dust backflow prevention door, giving a greater closing driving force to the dust backflow prevention door of the dust cup, thereby tightly closing the dust backflow prevention door and preventing dust leakage and other situations.

[0012] ⑤The vacuum pumping enhancement mechanism of the present invention can be arranged in the original vacuum pumping path, and there is no need to additionally reserve installation space for setting this mechanism, and it can be applied to the original installation environment of the product, having strong universality.

[0013] Further, the first opening corresponding to the same vacuum pumping enhancement part is smaller than the second opening. Therefore, by setting the second opening larger, a greater air flow rate can be formed at the second opening, and after passing through the larger diameter area in the middle of the vacuum pumping enhancement part and then through the smaller first opening, a greater air flow velocity and a higher suction force can be achieved. The size of the opening here can refer to the size of the cross-sectional area of the opening.

[0014] Further, the vacuum pumping enhancement part has a first structural member and a second structural member. The inner diameter of the first structural member gradually increases in the direction close to the second structural member, and the inner diameter of the second structural member gradually increases in the direction close to the first structural member. The first opening is arranged on the first structural member, and the second opening is arranged on the second structural member.

[0015] Further, the inner diameters of the first structural member and the second structural member gradually decrease in at least one of the following ways in the direction away from each other: equally spaced decrease, gradient decrease or spiral decrease.

[0016] Furthermore, the vacuum pumping enhancement part is arranged in the second vacuum chamber, and the openings of the first opening and the second opening are arranged on the side surface or end surface of the vacuum pumping enhancement part.

[0017] Furthermore, the vacuum pumping enhancement part includes at least one group, and each group includes at least one vacuum pumping enhancement part.

[0018] Furthermore, the vacuum pumping enhancement part includes at least two groups. Each group of vacuum pumping enhancement parts can be evenly arranged, so as to ensure better balance and stability of the overall equipment provided with the vacuum pumping enhancement mechanism.

[0019] Further, the chamber wall of the second vacuum chamber is integrally formed or formed in cooperation with the housing of the third structural member. For example, when the third structural member is the housing of a motor, at least a part of the housing of the motor is disposed in the second vacuum chamber, and the housing of the motor forms a part of the chamber wall of the second vacuum chamber. By adopting this setting form, the vacuum pumping efficiency enhancing part can cleverly utilize the existing structural components, making the overall setting structure more compact.

[0020] A second object of the present invention is to provide a pushing and tightening structure for preventing dust backflow of a vacuum cleaner, which includes the aforementioned vacuum pumping efficiency enhancing mechanism. The pushing and tightening structure for preventing dust backflow is used to apply a force for closing the dust backflow prevention door to the dust backflow prevention door disposed between the dust cup and the suction pipe. The force for closing the dust backflow prevention door is a force opposite to the door opening direction during the suction operation of the vacuum cleaner.

[0021] Further, the vacuum pumping efficiency enhancing mechanism is connected to the dust cup, and the air flow can enter the vacuum pumping efficiency enhancing part of the vacuum pumping efficiency enhancing mechanism through the air extraction outlet of the dust cup, and the air flow inside the dust cup and the vacuum pumping efficiency enhancing mechanism can communicate with each other. When the vacuum cleaner stops the suction operation, the outside air will quickly fill the dust cup and the second vacuum chamber and flow rapidly towards the direction of the dust backflow prevention door. Since the second vacuum chamber has a relatively large volume, and at the same time, in the presence of the second vacuum chamber and each vacuum pumping efficiency enhancing part provided therein, a greater vacuum breaking force is formed, and the air flow flows towards the direction of the dust backflow prevention door and gives a greater closing driving force to the dust backflow prevention door of the dust cup, thereby tightly closing the dust backflow prevention door and preventing dust leakage and other situations.

[0022] A third object of the present invention is to provide a vacuum cleaner, which includes the aforementioned pushing and tightening structure for preventing dust backflow.

[0023] Further, the vacuum cleaner further includes a suction motor, one end of the suction motor close to the dust cup is connected to the vacuum pumping efficiency enhancing mechanism, and the outer shell of the suction motor and the chamber wall of the second vacuum chamber jointly form a closed space.

[0024] Furthermore, at least one group of the vacuum pumping efficiency enhancing parts is provided, and the vacuum efficiency enhancing parts are arranged around the suction motor. Therefore, this solution cleverly utilizes the structural shape of the existing vacuum cleaner and does not require excessive additional space occupation due to the setting of the vacuum pumping efficiency enhancing parts. Each vacuum pumping efficiency enhancing part can be evenly distributed on the outer peripheral side of the suction motor or can be arranged in a non-uniform form.

[0025] Furthermore, at least two groups of vacuum pumping enhancement parts are included and symmetrically arranged on both sides of the vacuum cleaner connecting pipe. The vacuum cleaner connecting pipe here can be a suction pipe, a handle rod body, or other rod bodies for connecting the dust cup and the motor to the vertical rod of the vacuum cleaner. Therefore, it will not interfere with the original structure setting of the vacuum cleaner and has a high aesthetic degree.

[0026] Furthermore, the inner surface of the cavity wall of the second vacuum cavity corresponding to each group of the vacuum pumping enhancement parts is a shell with a rounded corner treatment. Therefore, on the one hand, it matches the external shape structure of the vacuum pumping enhancement part, and on the other hand, it minimizes the air resistance to the air flow located in the second vacuum cavity caused by the shape of the shell.

[0027] Furthermore, a cyclone separation part is also arranged in the middle of the dust cup. One end of the cyclone separation part far from the vacuum pumping enhancement mechanism is a cyclone air inlet, and the other end is a cyclone air outlet. The cyclone separation part includes a main cylinder body. A dust baffle net is arranged on the outer surface of the main cylinder body. A plurality of air guiding edges are arranged inside the main cylinder body and extend spirally along the inner wall of the main cylinder body towards one end close to the cyclone air outlet. The upper end of one air guiding edge and the lower end of the adjacent air guiding edge are arranged in a vertically staggered form, and an air inlet is formed therebetween. Description of the Drawings

[0028] Figure 1 It is a cross-sectional structural schematic diagram after the vacuum pumping enhancement mechanism of Embodiment 1 of the present invention is connected to the dust cup;

[0029] Figure 2 is Figure 1 A three-dimensional structural schematic diagram when part of the cavity wall of the second vacuum cavity is removed;

[0030] Figure 3 It is a three-dimensional structural schematic diagram after the vacuum pumping enhancement mechanism of Embodiment 1 of the present invention is connected to the third structural member;

[0031] Figure 4 It is a deformed structure of the second vacuum cavity of Embodiment 1 of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the first structural member and the second structural member of Embodiment 1 of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the first structural member and the second structural member of Embodiment 1 of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the first structural member and the second structural member of Embodiment 1 of the present invention;

[0035] Figure 8Schematic diagram of the installation position of the dust-backflow prevention door according to the second embodiment of the present invention;

[0036] Figure 9 Schematic diagram of the air flow direction inside the vacuum pumping and efficiency enhancing part according to the second embodiment of the present invention;

[0037] Figure 10 Partial structural schematic diagram of the cyclone separation part according to the second embodiment of the present invention;

[0038] Figure 11 Schematic diagram of the structure of another perspective of the partial structure of the cyclone separation part according to the second embodiment of the present invention;

[0039] Figure 12 Schematic diagram of the installation position of the dust suction pipe and the vacuum pumping and efficiency enhancing mechanism according to the third embodiment of the present invention.

[0040] In the figure:

[0041] 1. Vacuum pumping and efficiency enhancing part; 11. First opening; 12. Second opening; 13. First structural member; 14. Second structural member; 21. First vacuum chamber; 22. Second vacuum chamber; 23. Suction port; 3. Third structural member; 4. Dust cup; 5. Dust suction pipe; 6. Transition connection housing; 7. Air suction motor; 8. Dust-backflow prevention door; 9. Cyclone separation part; 91. Cyclone air inlet; 92. Cyclone air outlet; 93. Main cylinder; 94. Air guiding edge; 95. Air inlet; 96. Baffle. Detailed implementation manners

[0042] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0043] Embodiment 1:

[0044] The vacuum pumping and efficiency enhancing mechanism of this embodiment is used in equipment that requires vacuum pumping. For example, it can be used in vacuum cleaners (including but not limited to upright vacuum cleaners, horizontal vacuum cleaners, handheld vacuum cleaners or floor sweeping robots) or vacuum drying ovens, vacuum coating equipment, vacuum packaging equipment, etc.

[0045] Currently, in order to achieve the effect of improving the vacuum suction, most rely on the method of improving the efficiency of the driving source (such as a motor). However, this will cause relatively large energy consumption and is also not conducive to improving the battery life of rechargeable equipment.

[0046] See the attached Figure 1-3As shown in the figure, the vacuum pumping efficiency enhancing mechanism of this embodiment includes: at least one vacuum pumping efficiency enhancing part 1 and a vacuum chamber. The vacuum chamber includes a first vacuum chamber 21 and a second vacuum chamber 22. The vacuum pumping efficiency enhancing part 1 is respectively communicated with the first vacuum chamber 21 and the second vacuum chamber 22. The vacuum pumping efficiency enhancing part 1 is used to compress the hardness of the air, increase the flow rate of the vacuum pumping air, so that the same motor can exert a stronger effect. By setting the second vacuum chamber 22 communicated with the vacuum pumping efficiency enhancing part 1, enough space and conditions can be provided to increase the air flow rate during vacuum pumping, so that the suction force during vacuum pumping can be further enhanced under the action of the second vacuum chamber 22, and the vacuum pumping efficiency of the vacuum pumping device is higher.

[0047] In some embodiments, part of the chamber wall of the second vacuum chamber 22 and the third structural member 3 together form a closed space, and each vacuum pumping efficiency enhancing part 1 is accommodated in the second vacuum chamber 22. The statement "the vacuum pumping efficiency enhancing part 1 is accommodated in the second vacuum chamber 22" does not strictly mean that all structures of each vacuum pumping efficiency enhancing part 1 are accommodated in the second vacuum chamber 22, but only that most of the structures of the vacuum pumping efficiency enhancing part 1 are located in the second vacuum chamber 22. Referring to the attached Figure 3 figure again, only the part of the vacuum pumping efficiency enhancing part 1 above the first opening 11 is located in the second vacuum chamber 22.

[0048] The third structural member 3 can be the outer casing of other mechanisms, or the chamber wall of the second vacuum chamber 22 can be directly set as a continuous and complete casing, as long as it is ensured that a closed structure form can be formed by the chamber wall of the second vacuum chamber 22 and / or the third structural member 3, with all other regions being closed except for the first opening 11.

[0049] In some embodiments, the third structural member 3 is the outer casing of the motor. At least part of the casing of the motor forms part of the chamber wall of the second vacuum chamber 22. The outer casing of the motor and the chamber wall of the second vacuum chamber 22 together form a closed space to form the second vacuum chamber 22.

[0050] In other possible embodiments, referring to the attached Figure 4 figure, the chamber wall of the second vacuum chamber 22 can also be set as a closed structure, and a closed space can be directly formed by using the chamber wall of the second vacuum chamber 22.

[0051] Referring to Figure 2 the figure, in other possible embodiments, the third structural member 3 can be in a shape extending to the middle of each vacuum pumping efficiency enhancing part 1 or a structure arranged in a region close to the end of the vacuum pumping efficiency enhancing part 1.

[0052] Referring to the attached Figure 5As shown, in some embodiments, the vacuum pumping enhancement part 1 has a first opening 11 and a second opening 12. The first opening 11 and the second opening 12 are respectively arranged near two mutually remote ends of the vacuum pumping enhancement part 1. The inner diameter of the middle region of the vacuum pumping enhancement part 1 is larger than the inner diameters of its two mutually remote ends. The vacuum pumping enhancement part 1 has a first structural member 13 and a second structural member 14. The inner diameter of the first structural member 13 gradually increases in the direction approaching the second structural member 14, and the inner diameter of the second structural member 14 gradually increases in the direction approaching the first structural member 13. The first opening 11 is arranged on the first structural member 13, and the second opening 12 is arranged on the second structural member 14. As Figure 9 shown by the hollow arrow in the figure, when vacuum pumping is carried out, the air flow direction in the second vacuum chamber 22 sequentially passes through the second opening 12, the middle region of the vacuum pumping enhancement part 1, and then enters the suction port after passing through the first opening 11. Therefore, in this solution, the vacuum pumping enhancement part 1 is set to a structure with a small diameter at both ends and a large diameter in the middle. Since the inner diameter of the first opening 11 is smaller than that of the middle region of the vacuum pumping enhancement part 1, when vacuum pumping is carried out, the flow velocity of the air flow increases under the action of the first opening 11, so the suction force increases, and thus the "hardness" of the suction air of the vacuum pumping device is improved; since the inner diameter of the middle region of the vacuum pumping enhancement part 1 is set to be larger, it has a certain storage space. Therefore, when vacuum pumping, the air flow in this region has a large flow rate and a small air flow resistance, which provides a structural basis for increasing the air flow rate passing through the first opening 11 during vacuum pumping, and a greater suction effect can be formed under the same driving source power. By setting the second opening 12 to be smaller than the inner diameter of the middle region of the vacuum pumping enhancement part 1, the air flow rate during vacuum pumping can be quickly increased, and further, the flow velocity and suction force can be increased under the action of the first opening 11.

[0053] The first structural member 13 and the second structural member 14 can be an integral part or a split part. When it is a split part, the installation difficulty can be reduced.

[0054] In some embodiments, the second opening 12 communicates with the second vacuum chamber 22, and the second vacuum chamber 22 is an additional vacuum pumping space based on the first vacuum chamber 21. Therefore, in cooperation with each vacuum pumping enhancement part 1, sufficient space and conditions can be provided to increase the air flow rate during vacuum pumping, and the load on the driving power supply can be released briefly, without having to keep the driving power supply in a high-load state for a long time. Thus, the energy consumption during vacuum pumping is reduced, and a greater suction force can be formed under the same driving source power, so that the suction efficiency during vacuuming is further improved under the action of the second vacuum chamber 22.

[0055] In some embodiments, the inner diameters of the first structural member 13 and the second structural member 14 may not adopt a gradually changing form. For example, equidistant change, gradient change or spiral change, as long as it is ensured that the inner diameter of the first structural member 13 increases in the direction close to the second structural member 14, and the inner diameter of the second structural member 14 has an increasing trend in the direction close to the first structural member 13.

[0056] In some embodiments, the external shape of the vacuum pumping enhancement part 1 can be consistent with the internal shapes of the first structural member 13 and the second structural member 14. This structural form can increase the volume in the second vacuum chamber 22 as large as possible within a limited space, thus improving the internal space of the second vacuum chamber 22. For example, it is spindle-shaped, olive-shaped, or the first structural member 13 and the second structural member 14 are set as truncated cones and spliced together. The external shape of the vacuum pumping enhancement part 1 can be inconsistent with the internal shapes of the first structural member 13 and the second structural member 14. For example, it is directly set as a cylindrical shape or other shapes. This setting method can facilitate the processing and setting of the vacuum pumping enhancement part 1.

[0057] In some embodiments, the first opening 11 is arranged along the central axis direction of the second vacuum chamber 22 (as Figure 5 shown), and the two mutually remote ends of the vacuum pumping enhancement part 1 are closed by the inner wall of the chamber wall of the second vacuum chamber 22. This is set to adapt to the shape of the chamber wall of the second vacuum chamber 22 in this embodiment, which is convenient for setting the first opening 11 and the second opening 12. The first opening 11 can also be arranged close to the second vacuum chamber 22 side, but it does not have to be parallel to the axial direction of the vacuum pumping enhancement part 1. In other possible embodiments, as Figure 6 shown, the central axes of the first structural member 13 and the second structural member 14 can also form a certain angle, and at the same time, the first opening 11 and the second opening 12 face the middle area of the second vacuum chamber 22. In other possible embodiments, as Figure 7 shown, the first structural member 13 and the second structural member 14 can be in the structure as Figure 5 shown, but the first opening 11 and the second opening 12 are not on the sides of the first structural member 13 and the second structural member 14, but are directly arranged at the mutually remote ends of the two.

[0058] In some embodiments, the central axis of the vacuum pumping enhancement part 1 is parallel to the central axis of the second vacuum chamber 22. Thus, it is convenient for the setting and installation of the structure. However, it is not limited to always setting the central axis of the vacuum pumping enhancement part 1 parallel to the central axis of the second vacuum chamber 22.

[0059] In some embodiments, referring back to the attached Figure 2As shown, there are at least two groups of vacuum pumping efficiency enhancing parts 1, each group includes at least one vacuum pumping efficiency enhancing part 1, and each group of the vacuum pumping efficiency enhancing parts 1 is symmetrically arranged on both sides of the third structural member 3. Correspondingly, the chamber walls of the second vacuum chamber 22 are respectively arranged corresponding to each group of vacuum pumping efficiency enhancing parts 1, and the interiors of the second vacuum chambers 22 corresponding to the vacuum pumping efficiency enhancing parts 1 communicate with each other (that is, there is only one second vacuum chamber 22 for accommodating each vacuum pumping efficiency enhancing part 1). Therefore, it is more conducive to gathering the gas pressurized by the vacuum pumping efficiency enhancing part 1 and forming a relatively larger accommodating space, which not only increases the wind force of vacuum pumping during suction, but also forms a greater airflow impact force when the equipment stops vacuum pumping to break the vacuum.

[0060] In other possible embodiments, the vacuum pumping efficiency enhancing part 1 can also be set to only one group. At this time, each vacuum pumping efficiency enhancing part can be arranged in a uniformly distributed form, or the vacuum pumping efficiency enhancing part 1 can be eccentrically arranged on the third structural member 3.

[0061] In some embodiments, the cross-sectional area of the first opening 11 corresponding to the same vacuum pumping efficiency enhancing part 1 is smaller than the cross-sectional area of the second opening 12. By setting the opening size of the second opening 12 to be larger than that of the first opening 11, during vacuum pumping, a larger airflow rate can be formed at the second opening 12, and after passing through the larger diameter area in the middle of the vacuum pumping efficiency enhancing part 1 and then passing through the smaller opening first opening 11, a larger vacuum pumping flow rate and a higher suction force can be achieved.

[0062] See the appendix Figure 2 As shown, in some embodiments, one in the middle of each group of vacuum pumping efficiency enhancing parts 1 is the highest in the axial direction, and those on both sides of it gradually decrease. This is to facilitate arranging a chamber wall structure of the second vacuum chamber 22 that matches its shape corresponding to each group of vacuum pumping efficiency enhancing parts 1. Because the space near both sides of each group of vacuum pumping efficiency enhancing parts 1 is relatively limited, its height is set to be smaller. Of course, the second vacuum chamber 22 can also be simply set as a standard circular or spherical shape, so that the heights of each vacuum pumping efficiency enhancing part 1 can be kept consistent.

[0063] In other possible embodiments, the size changes of each vacuum pumping efficiency enhancing part 1 can be arbitrarily changed without rules.

[0064] In some embodiments, the sizes of the first openings 11 in the present application are somewhat different. Thus, the maximum suction force will surely be formed in a certain first opening 11 among the first openings 11. Therefore, a cyclone starting point is formed at the first opening 11 with the maximum suction force, and a cyclone is further formed in the first vacuum chamber 21. At the same time, a cyclone is also formed in the second vacuum chamber 22, thereby further increasing the vacuum pumping efficiency of the vacuum pumping efficiency enhancing mechanism of the present invention.

[0065] In some embodiments, the first opening 11 of the middle one in each group of vacuum pumping enhancement parts 1 is set to be the smallest, so the pumping force here is the largest, and a starting point for the cyclone is formed. At the same time, it drives the rotation of the air flow in the first vacuum chamber 21 and naturally forms a vortex in the first vacuum chamber 21. Obviously, it is not limited to forming the largest pumping force at the first opening 11 of the middle vacuum pumping enhancement part 1. Other first openings 11 can also be set to be the smallest to form the largest pumping force; or due to factors such as the occlusion of other objects in the first vacuum chamber 21, the largest pumping force is not formed at the originally expected smallest first opening 11, but at other first openings 11. These situations occur randomly. However, there must be a first opening 11 where the largest pumping force can be generated and a cyclone is formed in the first vacuum chamber 21.

[0066] In some embodiments, there are multiple vacuum pumping enhancement parts 1, which are arranged in a honeycomb shape around the motor. Correspondingly, the chamber wall of the second vacuum chamber 22 is also set in a structural form that can accommodate the vacuum pumping enhancement parts 1 therein.

[0067] In some embodiments, the chamber wall of the second vacuum chamber 22 corresponding to each group of vacuum pumping enhancement parts 1 is spherical, hemispherical or in the shape of a shell with a rounded inner surface. Thus, on the one hand, it matches the external shape structure of the vacuum pumping enhancement parts 1, and on the other hand, it minimizes the air resistance to the gas located in the second vacuum chamber 22 due to the shape of the shell.

[0068] Embodiment Two:

[0069] This embodiment is a pushing and tightening structure for the dust and debris backflow prevention door 8 of a vacuum cleaner, which includes the vacuum pumping enhancement mechanism of Embodiment One. The pushing and tightening structure for the dust and debris backflow prevention door 8 is used to apply a force to the dust and debris backflow prevention door 8 (see the attachment Figure 8 shown) provided between the dust cup 4 and the suction pipeline 5 to make the dust and debris backflow prevention door 8 close. The force to make the dust and debris backflow prevention door 8 close is a force opposite to the opening direction of the dust and debris backflow prevention door 8 during the vacuuming operation of the vacuum cleaner.

[0070] The pushing and tightening structure of the dust backflow prevention door 8 further includes a driving source for forming a vacuum suction force. The suction port 23 of the driving source can communicate with the first opening 11 of the vacuum pumping and enhancing part 1. The chamber wall of the second vacuum chamber 22 of the vacuum pumping and enhancing mechanism is connected to the dust cup 4 through a transition connection housing 6. Of course, in some embodiments, it is not necessary to separately provide the transition connection housing 6. Instead, a housing extending toward the second vacuum chamber 22 can be provided at one end of the dust cup 4 close to the second vacuum chamber 22 to connect with the housing of the second vacuum chamber 22; or a housing extending toward the dust cup 4 can be provided at one end of the second vacuum chamber 22 close to the dust cup 4 to connect with the dust cup 4. The dust cup 4 forms the first vacuum chamber 21 of this embodiment.

[0071] In some embodiments, the driving source is a suction motor 7. A dust suction inlet is provided on the side of the dust suction pipe 5 close to the dust cup 4. At the dust suction inlet, there is a dust backflow prevention door 8 that can open toward the axial center side of the dust cup 4 under the action of the vacuum pumping force when the suction motor 7 is working. The dust backflow prevention door 8 can be made of rubber or other materials with a certain deformation ability. Under normal circumstances, the dust backflow prevention door 8 itself has a certain elastic force that automatically closes toward the dust suction inlet. If there is no foreign object blocking between the dust backflow prevention door 8 and the dust suction inlet, the dust backflow prevention door 8 can automatically close. However, if there is a foreign object with a relatively large volume blocking, the dust backflow prevention door 8 cannot automatically cover by relying on its own elastic deformation force, resulting in the dust in the dust cup 4 leaking through the dust suction inlet and even leaking out through the dust suction head of the vacuum cleaner, affecting the user experience.

[0072] When the vacuum cleaner stops the dust suction operation, the internal vacuum environment of the vacuum cleaner will be quickly filled with external air and the vacuum will be broken. At this time, after the vacuum cleaner stops the dust suction operation, the negative pressure space inside the vacuum cleaner is quickly filled with external air (commonly known as the "vacuum breaking" state). The external air will quickly fill the dust cup 4 and the second vacuum chamber 22 and flow rapidly toward the direction of the dust backflow prevention door 8. At this time, due to the relatively large volume of the second vacuum chamber 22, and at the same time, in the presence of the second vacuum chamber 22 and each vacuum pumping and enhancing part 1 provided inside it, a greater vacuum breaking force is formed, and the air flow is caused to flow toward the direction of the dust backflow prevention door 8 and give a greater closing driving force to the dust backflow prevention door 8 of the dust cup 4, thereby tightly covering the dust backflow prevention door 8 and preventing dust leakage and other situations.

[0073] In some embodiments, the housing part of one end of the suction motor 7 close to the second vacuum chamber 22 becomes a part of the chamber wall constituting the second vacuum chamber 22, which is both to meet the original structural design habit of the vacuum cleaner without adjusting the original structure of the vacuum cleaner; at the same time, it also makes the motor closer to the dust cup 4, reduces the energy loss caused by too long path setting, and improves the dust suction efficiency.

[0074] See the appendix Figure 10 and 11 As shown, in some embodiments, a cyclone separation part 9 is further provided in the middle of the dust cup 4. One end of the cyclone separation part 9 away from the vacuum pumping efficiency enhancing mechanism is the cyclone air inlet 91, and the other end is the cyclone air outlet 92. The cyclone separation part 9 includes a main cylinder 93, and a dust baffle net is provided on the outer surface of the main cylinder 93. A plurality of air guiding edges 94 extending spirally along the inner wall of the main cylinder 93 towards the end close to the cyclone air outlet 92 are provided inside the main cylinder 93. The upper end of one air guiding edge 94 and the lower end of the adjacent air guiding edge 94 are arranged in a vertically staggered manner, and an air inlet 95 is formed therebetween. The air flow passes through the air inlet 95 and is sucked spirally towards the end close to the cyclone air outlet 92 under the guidance of the air guiding edge 94. Therefore, when the vacuum cleaner performs the dust suction work, the air carrying dust rotates in the cyclone separation part 9 in the dust cup 4, and the dust is blocked in the dust cup 4, and the air flow flows in a cyclone manner towards the end of the vacuum pumping efficiency enhancing mechanism, which is beneficial to the efficient separation of dust.

[0075] In some embodiments, a baffle 96 protruding in the direction away from the cyclone air outlet 92 is further provided at one end of the cyclone air inlet 91. There is a certain hollow area between the baffle 96 and the air guiding edge 94, so that the air flow can flow towards the air inlet 95 through this hollow area. The baffle 96 can guide the air flow entering the cyclone separation part 9 to the air guiding edge 94, so that the air flow is rotationally guided to flow towards the end of the cyclone air outlet 92, and is sucked out towards the cyclone air outlet 92 under the guidance of the air guiding edge 94.

[0076] Embodiment Three:

[0077] This embodiment is a vacuum cleaner, which includes the tightening structure of the dust and object backflow prevention door 8 in Embodiment Two.

[0078] The vacuum cleaner further includes a dust suction motor. One end of the dust suction motor close to the dust cup 4 is connected to the vacuum pumping efficiency enhancing mechanism, and the outer shell of the dust suction motor and the wall of the second vacuum chamber 22 together form a closed space.

[0079] In some embodiments, there is only one group of vacuum pumping efficiency enhancing parts 1, and each group includes one or more. When there are multiple vacuum pumping efficiency enhancing parts, they can be arranged around (not limited to evenly distributed, such as eccentrically arranged) the dust suction motor. Therefore, the present application cleverly utilizes the structure and shape of the existing vacuum cleaner, and does not require additional excessive space occupation due to the setting of the vacuum pumping efficiency enhancing part 1.

[0080] In some embodiments, the vacuum pumping efficiency enhancing part 1 includes at least two groups and is symmetrically arranged on both sides of the vacuum cleaner connection pipe. Here, the vacuum cleaner connection pipe can be the dust suction pipe 5 (See the appendixFigure 12 As shown), it can also be a handle rod body, or other rod bodies used to connect the dust cup 4 and the vacuum motor to the vertical rod of the vacuum cleaner. Thus, it will not interfere with the original structure setting of the vacuum cleaner. In some embodiments, there are two sets of vacuum pumping enhancement parts 1, which are arranged symmetrically on both sides of the vacuum cleaner connecting pipe, ensuring the force balance of the handle area of the vacuum cleaner and having high aesthetics. In some embodiments, there are three sets of vacuum pumping enhancement parts 1, with one set arranged on each side of the vertical rod of the vacuum cleaner, and the third set is arranged in the area opposite to the vertical rod of the vacuum cleaner and in the middle of the first two sets of vacuum pumping enhancement parts 1. Obviously, when there are two or more sets of vacuum pumping enhancement parts, it is not necessary to be limited to a symmetrical or evenly distributed arrangement on the vacuum cleaner.

[0081] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A vacuum enhancement mechanism, used in a vacuum cleaner and used in conjunction with a vacuum drive source to achieve vacuuming, characterized in that: include: At least one vacuum enhancement part is used to increase the airflow speed and flow rate during vacuuming, the vacuum enhancement part has a first opening and a second opening, the first opening and the second opening are respectively arranged near two ends of the vacuum enhancement part that are far away from each other, the first opening is located at one end near the suction port of the vacuum driving source, The inner diameter of the middle region of the vacuum enhancement portion is greater than the inner diameters of the two end regions thereof which are far from each other; The vacuum chamber includes a second vacuum chamber, and the second opening is connected to the second vacuum chamber.

2. The vacuum enhancement mechanism according to claim 1, characterized in that: The first opening corresponding to the same vacuum enhancement portion is smaller than the second opening.

3. The vacuum enhancement mechanism according to claim 2, characterized in that: The vacuum enhancement part has a first structural member and a second structural member. The inner radial direction of the first structural member gradually increases in a direction approaching the second structural member, and the inner radial direction of the second structural member gradually increases in a direction approaching the first structural member. The first opening is set in the first structural member, and the second opening is set in the second structural member.

4. The vacuum enhancement mechanism according to claim 3, characterized in that: The inner diameters of the first structural member and the second structural member gradually decrease in a direction away from each other in at least one of the following ways: equidistant decrease, gradient decrease, or spiral decrease.

5. The vacuum enhancement mechanism according to any one of claims 2 to 4, characterized in that: The vacuum efficiency enhancement portion is disposed in the second vacuum chamber, and the first opening and the second opening are disposed on a side surface or an end surface of the vacuum efficiency enhancement portion.

6. The vacuum enhancement mechanism according to any one of claims 2 to 4, characterized in that: The vacuum enhancement part includes at least one group, and each group includes at least one vacuum enhancement part.

7. The vacuum enhancement mechanism according to claim 6, characterized in that: The vacuum enhancement parts are at least two groups.

8. The vacuum enhancement mechanism according to claim 7, characterized in that: The cavity wall of the second vacuum cavity is formed integrally or in cooperation with the shell of the third structural member.

9. A pushing and tightening structure for preventing dust backflow door of a vacuum cleaner, characterized in that: It comprises the vacuum enhancement mechanism as described in any one of claims 1 to 8, wherein the pushing structure of the dust backflow prevention door is used to apply a force to close the dust backflow prevention door arranged between the dust cup and the dust suction duct.

10. The pushing and tightening structure of the dust backflow prevention door of the vacuum cleaner according to claim 9, characterized in that: The vacuum enhancement mechanism is connected to the dust cup, and the dust cup and the airflow inside the vacuum enhancement mechanism can be interconnected.

11. A vacuum cleaner, characterized in that: It includes the pushing structure for preventing dust backflow door as claimed in claim 9 or 10.

12. The vacuum cleaner according to claim 11, characterized in that: The vacuum cleaner also includes a vacuum motor, one end of the vacuum motor close to the dust cup is connected to the vacuum enhancement mechanism, and the outer shell of the vacuum motor and the wall of the second vacuum chamber together form a closed space.

13. The vacuum cleaner according to claim 12, characterized in that: At least one group of the vacuuming efficiency enhancement parts is provided, and the vacuuming efficiency enhancement parts are arranged around the dust collecting motor.

14. The vacuum cleaner according to claim 12 or 13, characterized in that: A cyclone separation part is also provided in the middle of the dust cup, one end of the cyclone separation part away from the vacuum enhancement mechanism is a cyclone air inlet, and the other end is a cyclone air outlet. The cyclone separation part comprises a main cylinder, a dust blocking net is arranged on the outer surface of the main cylinder, and a plurality of wind guide edges are arranged inside the main cylinder, extending spirally along the inner wall of the main cylinder toward one end close to the cyclone air outlet. The upper end of one of the air guide edges is arranged in an up-and-down staggered manner with the lower end of the adjacent air guide edge, and an air inlet is formed between the two.

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