Vacuum-pumping efficiency-increasing mechanism, pushing structure for preventing dust from flowing back to door and dust collector

Abstract

The invention relates to the technical field of dust collectors, and particularly discloses a vacuumizing synergistic mechanism, a pushing structure for preventing dust from flowing back to a door and a dust collector. The vacuumizing synergistic mechanism comprises at least one vacuumizing synergistic part, the vacuumizing synergistic part is provided with a first opening and a second opening, and the first opening and the second opening are arranged close to the two ends, away from each other, of the vacuumizing synergistic part respectively. The inner diameter of the middle area of the vacuumizing synergistic part is larger than the inner diameters of the two ends, away from each other, of the vacuumizing synergistic part. The second opening is communicated with the second vacuum cavity, the second vacuum cavity is provided with a cavity wall, and a closed space is formed by the cavity wall and / or the third structural part. According to the vacuum pumping device, the flow and the flow speed of gas during vacuum pumping are improved through the vacuum pumping efficiency increasing part, meanwhile, the power consumption of the vacuum pumping driving source can be effectively reduced, the vacuum degree gathering effect is achieved through the second vacuum cavity, and the vacuum pumping efficiency is higher.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum cleaners, and in particular to a vacuuming efficiency enhancement mechanism, a pushing structure for preventing a dust backflow door, and a vacuum cleaner. Background Art

[0002] In vacuum cleaners or other devices that require vacuuming, the efficiency of the vacuuming of the device has a direct and important impact on the working effect. Usually, in order to achieve the effect of improving the vacuum suction, most of them rely on improving the efficiency of the drive motor. However, this will cause a large consumption of energy and is not conducive to improving the battery life of rechargeable devices. Therefore, how to improve the vacuuming efficiency of the device under low power consumption conditions is a key issue.

[0003] In a vacuum cleaner, dust is usually blocked and collected in a dust cup connected to the dust collection duct. In order to prevent the dust in the dust cup from leaking out when the vacuuming stops, a dust backflow prevention door that can automatically reset and close is set at the dust cup and the dust suction port of the dust collection duct. The dust backflow prevention door commonly used in the industry is a door body made of rubber or other elastic materials. When the vacuuming motor is vacuuming, the dust backflow prevention door can be opened under the action of vacuum suction, and after the vacuuming stops, the dust backflow prevention door can automatically reset and close.

[0004] However, when the dust backflow prevention door and the dust suction port are blocked by dust or debris, the door body cannot be completely closed solely relying on the restoring force of the dust backflow prevention door itself, resulting in dust leakage. 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 enhancement mechanism, which cooperates with a vacuum driving source to achieve vacuuming, and includes: at least one vacuum enhancement part, which is used to increase the airflow speed and flow rate during vacuuming, and the vacuum enhancement part has a first opening and a second opening, and 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, and the first opening is located at one end near the suction port of the vacuum driving source, and the inner diameter of the middle area of ​​the vacuum enhancement part is greater than the inner diameter of its two end areas that are far away from each other; a vacuum chamber, the vacuum chamber includes a first vacuum chamber and a second vacuum chamber, and the second opening is connected to the second vacuum chamber. The second vacuum chamber has a chamber wall, and a closed space is formed by the chamber wall and / or the third structural member. The first opening is connected to the suction port of the vacuum driving source.

[0006] The vacuum enhancement mechanism of the present invention has the following beneficial effects: ① The present application sets the first opening to be smaller than the inner diameter of the middle area of ​​the vacuum enhancement part, so that the flow rate increases during vacuuming, thereby increasing the suction force of vacuuming, and thus improving the "hardness" of the suction wind of the vacuuming equipment; the inner diameter of the middle area of ​​the vacuum enhancement part is set to be larger, so that the airflow rate increases and the airflow resistance is smaller, providing a structural basis for increasing the flow rate of the airflow passing through the first opening during vacuuming. By setting the second opening to be smaller than the inner diameter of the middle area of ​​the vacuum enhancement part, and connecting the second opening to the second vacuum chamber, the flow rate of the vacuuming airflow can be quickly increased during vacuuming.

[0007] Therefore, the present application provides a vacuum enhancement part, and the vacuum enhancement part is configured to have a structure in which the inner diameter of the middle area is larger than the inner diameters of the two ends that are far away from each other, that is, a structure with small ends and a "big belly" is formed. The air in the second vacuum chamber passes through the second opening, the middle area of ​​the vacuum enhancement part and the first opening in sequence and then enters the suction port. The flow rate and flow velocity of the airflow are significantly increased, thereby effectively improving the vacuuming force of the vacuum equipment.

[0008] ② The present application is based on the existing vacuum chamber which has only one first vacuum chamber, and further adds a second vacuum chamber, and the second opening of each vacuum enhancement part is connected to the second vacuum chamber. Therefore, it can provide sufficient space and conditions for increasing the airflow rate during vacuuming, and can release the load on the driving power supply to a certain extent, without making the driving power supply in a high-load state for a long time, thereby reducing the energy consumption during vacuuming. Under the same driving source power, a greater suction force can be formed, so that the suction efficiency during vacuuming is further improved under the action of the second vacuum chamber.

[0009] ③ Since the suction forces formed at the first openings of each vacuum enhancement part are not exactly the same (they vary according to the size of the second opening, the volume of the vacuum enhancement part or the size of the first opening and the degree of obstruction by foreign matter), during vacuuming, the suction force formed at a certain first opening is greater than the suction forces of other first openings. Thus, the main force point of the cyclone is formed at the first opening where the suction force is the largest, affecting the airflow at other first openings, and further naturally forming a cyclone in the first vacuum chamber. At the same time, a cyclone is also formed in the second vacuum chamber under the action of the airflow, thereby further increasing the vacuuming efficiency of the vacuum enhancement mechanism of the present invention.

[0010] ④ The first opening of the vacuum enhancement part of the present application is the only gas inlet and outlet of the second vacuum chamber. When the vacuum enhancement mechanism of the present invention is used in a vacuum cleaner, after the vacuum cleaner stops vacuuming, the negative pressure space inside the vacuum cleaner is rapidly filled with outside air (commonly known as the "vacuum breaking" state). At this time, since the second vacuum chamber has a relatively large volume, and at the same time, with the presence of the second vacuum chamber and the various vacuum enhancement parts arranged inside it, a larger vacuum breaking force is formed, and the air flow is made to flow in the direction of the dust backflow prevention door and give the dust backflow prevention door of the dust cup a larger driving force to close the door, thereby tightly closing the dust backflow prevention door, and preventing dust leakage, etc.

[0011] ⑤ The vacuum enhancement mechanism of the present invention can be set in the original vacuum passage, and there is no need to reserve additional installation space for setting up the mechanism. It can be applied to the original installation environment of the product and has strong universality.

[0012] Furthermore, the first opening corresponding to the same vacuum enhancement part is smaller than the second opening. Therefore, by setting the second opening larger, a larger airflow rate can be formed at the second opening, and a larger airflow velocity and a higher suction force can be achieved after passing through the larger diameter area in the middle of the vacuum enhancement part and then passing through the first opening with a smaller opening. The size of the opening here may refer to the size of the opening cross-sectional area.

[0013] Furthermore, 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.

[0014] Furthermore, 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.

[0015] Furthermore, 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.

[0016] Furthermore, the vacuum enhancement part includes at least one group, and each group includes at least one vacuum enhancement part.

[0017] Furthermore, the vacuum enhancement parts include at least two groups. Each group of vacuum enhancement parts can be evenly distributed, thereby ensuring that the device provided with the vacuum enhancement mechanism has better balance and stability as a whole.

[0018] Furthermore, the cavity wall of the second vacuum cavity is formed integrally or in cooperation with the shell of the third structural member. For example, when the third structural member is the shell of the motor, at least a part of the shell of the motor is arranged in the second vacuum cavity, and the shell of the motor is formed as a part of the cavity wall of the second vacuum cavity. With this arrangement, the vacuum enhancement part can cleverly utilize the existing structural components, making the overall arrangement structure more compact.

[0019] The second object of the present invention is to provide a pushing structure for a dust backflow prevention door of a vacuum cleaner, which includes the aforementioned vacuum enhancement mechanism, and the pushing structure for the dust backflow prevention door is used to apply a force to the dust backflow prevention door arranged between the dust cup and the dust suction duct to close the dust backflow prevention door, and the force to close the dust backflow prevention door is a force opposite to the opening direction of the door body when the vacuum cleaner is performing a vacuuming operation.

[0020] Furthermore, the vacuum enhancement mechanism is connected to the dust cup, and the airflow can enter the vacuum enhancement part of the vacuum enhancement mechanism through the air extraction outlet of the dust cup, and the airflow inside the dust cup and the vacuum enhancement mechanism can be connected to each other. When the vacuum cleaner stops vacuuming, the outside air will quickly fill the dust cup and the second vacuum chamber, and flow quickly in the direction of the dust backflow prevention door. Since the second vacuum chamber has a relatively large volume, and at the same time, the second vacuum chamber and the vacuum enhancement parts arranged inside it form a greater vacuum breaking force, and the airflow flows in the direction of the dust backflow prevention door and gives the dust cup's dust backflow prevention door a greater driving force to close the door, thereby tightly covering the dust backflow prevention door, and preventing dust leakage.

[0021] A third object of the present invention is to provide a vacuum cleaner comprising the aforementioned pushing structure for preventing dust backflow door.

[0022] Furthermore, 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 cavity wall of the second vacuum chamber together form a closed space.

[0023] Furthermore, at least one group of the vacuum enhancement parts is provided, and the vacuum enhancement parts are provided around the dust collecting motor. Therefore, this solution cleverly utilizes the structure and appearance of the existing vacuum cleaner, and does not need to occupy too much extra space due to the provision of the vacuum enhancement parts. The vacuum enhancement parts can be evenly distributed on the outer peripheral side of the dust collecting motor, or unevenly distributed.

[0024] Furthermore, the vacuum enhancement part includes at least two groups, which are symmetrically arranged on both sides of the vacuum cleaner connecting pipe. The vacuum cleaner connecting pipe here can be a vacuum pipe, or a handle rod, or other rods used to connect the dust cup and the motor to the vertical pole of the vacuum cleaner. Therefore, it will not hinder the original structural setting of the vacuum cleaner, and the appearance is high.

[0025] Furthermore, the inner surface of the cavity wall of the second vacuum cavity corresponding to each group of the vacuum enhancement parts is a shell with rounded corners, thereby matching the external shape structure of the vacuum enhancement part and minimizing the wind resistance caused by the shape of the shell to the airflow in the second vacuum cavity.

[0026] Furthermore, a cyclone separation part is also provided in the middle part of the dust cup, and 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 includes a main cylinder body, a dust blocking net is provided on the outer surface of the main cylinder body, and a plurality of air guide edges are provided inside the main cylinder body, which extend in a spiral manner along the inner wall of the main cylinder body toward one end close to the cyclone air outlet. The upper end of one of the air guide edges is staggered with the lower end of the air guide edge adjacent to it, and an air inlet is formed between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic cross-sectional view of the structure after the vacuum enhancement mechanism and the dust cup are connected according to the first embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure when part of the wall of the second vacuum chamber is removed; Figure 3 It is a schematic diagram of the three-dimensional structure after the vacuum enhancement mechanism and the third structural member are connected in the first embodiment of the present invention; Figure 4 A deformed structure of the second vacuum chamber of the first embodiment of the present invention; Figure 5 A schematic structural diagram of a first structural member and a second structural member according to a first embodiment of the present invention; Figure 6 A schematic structural diagram of a first structural member and a second structural member according to a first embodiment of the present invention; Figure 7 A schematic structural diagram of a first structural member and a second structural member according to a first embodiment of the present invention; Figure 8 A schematic diagram of the location of the dust backflow prevention door according to the second embodiment of the present invention; Fig. 9 Schematic diagram of the flow direction of airflow in the vacuum enhancement unit of the second embodiment of the present invention; Fig.10It is a partial structural schematic diagram of the cyclone separation unit of the second embodiment of the present invention; Fig.11 A structural schematic diagram of a part of the cyclone separation unit according to the second embodiment of the present invention from another perspective; Fig.12 This is a schematic diagram of the location of the dust collection duct and the vacuum enhancement mechanism according to the third embodiment of the present invention.

[0028] In the figure: 1. Vacuum enhancement unit; 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 duct; 6. Transition connection shell; 7. Suction motor; 8. Door to prevent dust backflow; 9. Cyclone separation unit; 91. Cyclone air inlet; 92. Cyclone air outlet; 93. Main cylinder; 94. Wind guide edge; 95. Air inlet; 96. Baffle. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below 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 a clearer and more definite definition of the protection scope of the present invention.

[0030] Embodiment 1: The vacuuming enhancement mechanism of this embodiment is used in equipment that needs to be vacuumed, for example, it can be used in vacuum cleaners (including but not limited to upright vacuum cleaners, horizontal vacuum cleaners, handheld vacuum cleaners or sweeping robots) or vacuum drying boxes, vacuum coating equipment, vacuum packaging equipment, etc.

[0031] At present, in order to achieve the effect of improving vacuum suction, most of them rely on improving the efficiency of the driving source (such as a motor). However, this will cause a large consumption of energy and is not conducive to improving the battery life of rechargeable devices.

[0032] See attached Figure 1-3 As shown, the vacuum enhancement mechanism of this embodiment includes: at least one vacuum enhancement part 1 and a vacuum chamber, the vacuum chamber includes a first vacuum chamber 21 and a second vacuum chamber 22, and the vacuum enhancement part 1 is connected to the first vacuum chamber 21 and the second vacuum chamber 22 respectively. The vacuum enhancement part 1 is used to compress the hardness of the wind and increase the flow rate of the vacuumized wind, so that the same type of motor can play a stronger role. By providing a second vacuum chamber 22 connected to the vacuum enhancement part 1, sufficient space and conditions can be provided for increasing the airflow rate during vacuuming, so that the suction force during vacuuming is further enhanced under the action of the second vacuum chamber 22, so that the vacuuming efficiency of the vacuuming equipment is higher.

[0033] In some embodiments, part of the cavity wall of the second vacuum cavity 22 and the third structural member 3 form a closed space together, and each vacuum enhancement part 1 is contained in the second vacuum cavity 22. Here, "the vacuum enhancement part 1 is contained in the second vacuum cavity 22" does not strictly mean that the entire structure of each vacuum enhancement part 1 is contained in the second vacuum cavity 22, but only requires that most of the structure of the vacuum enhancement part 1 is located in the second vacuum cavity 22. Figure 3 As shown, only the portion of the vacuum enhancement unit 1 located above the first opening 11 is located in the second vacuum chamber 22 .

[0034] The third structural member 3 can be an outer shell of other mechanisms, or the cavity wall of the second vacuum chamber 22 can be directly set to a continuous and complete shell. It is only necessary to ensure that the cavity wall of the second vacuum chamber 22 and / or the third structural member 3 can form a structural form in which all areas except the first opening 11 are closed.

[0035] In some embodiments, the third structural member 3 is the outer shell of the motor, and the shell of at least a partial area of ​​the motor forms a part of the cavity wall of the second vacuum chamber 22. The outer shell of the motor and the cavity wall of the second vacuum chamber 22 together form a closed space to form the second vacuum chamber 22.

[0036] In other possible implementations, see the attached Figure 4 As shown, the cavity wall of the second vacuum cavity 22 may also be set as a closed structure, and the cavity wall of the second vacuum cavity 22 may be directly used to form a closed space.

[0037] See also Figure 2 As shown, in other possible implementations, the third structural member 3 may be a shape extending to the middle of each vacuum enhancement part 1 or a structure provided in a region close to the end of the vacuum enhancement part 1 .

[0038] See attached Figure 5 As shown, in some embodiments, the vacuum enhancement part 1 has a first opening 11 and a second opening 12, and the first opening 11 and the second opening 12 are respectively arranged near two ends of the vacuum enhancement part 1 that are far away from each other, and the inner diameter of the middle area of ​​the vacuum enhancement part 1 is larger than the inner diameters of the two ends that are far away from each other. The vacuum enhancement part 1 has a first structural member 13 and a second structural member 14, and the inner radial direction of the first structural member 13 gradually increases in a direction close to the second structural member 14, and the inner radial direction of the second structural member 14 gradually increases in a direction close to the first structural member 13, and 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. Fig. 9As shown by the hollow arrow, when vacuuming, the air in the second vacuum chamber 22 flows through the second opening 12, the middle area of ​​the vacuuming enhancement part 1 and the first opening 11 in sequence to enter the suction port. Therefore, this solution sets the vacuuming enhancement part 1 to a structure with small ends and large middle. Since the first opening 11 is smaller than the inner diameter of the middle area of ​​the vacuuming enhancement part 1, when vacuuming, the airflow velocity increases under the action of the first opening 11, thereby increasing the suction force, thereby increasing the "hardness" of the suction wind of the vacuuming equipment; since the inner diameter of the middle area of ​​the vacuuming enhancement part 1 is larger and has a certain storage space, the flow rate of the airflow in this area is larger and the airflow resistance is smaller when vacuuming, which provides a structural basis for increasing the flow rate of the airflow passing through the first opening 11 during vacuuming, 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 area of ​​the vacuum enhancement portion 1, the flow rate of the airflow during vacuuming can be quickly increased during vacuuming, and the flow rate and suction force can be further increased under the action of the first opening 11.

[0039] The first structural member 13 and the second structural member 14 can be an integral member or a split member. When they are split members, the difficulty of installation can be reduced.

[0040] In some embodiments, the second opening 12 is connected to the second vacuum chamber 22, which is an additional vacuum chamber 21. Therefore, in cooperation with each vacuum chamber 1, sufficient space and conditions can be provided to increase the airflow during vacuuming, and the load on the driving power supply can be temporarily released, so that the driving power supply does not need to be in a high-load state for a long time, thereby reducing the energy consumption during vacuuming, 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.

[0041] In some embodiments, the inner diameters of the first structural member 13 and the second structural member 14 may not be gradually changed, such as equidistant change, gradient change or spiral change, and it is only necessary to ensure 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 increases in the direction close to the first structural member 13.

[0042] In some embodiments, the external shape of the vacuum enhancement part 1 may be consistent with the internal shape of the first structural member 13 and the second structural member 14. This structural form can increase the volume of the second vacuum chamber 22 as much as possible within a limited space, thereby increasing the internal space of the second vacuum chamber 22. For example, it may be spindle-shaped, olive-shaped, or the first structural member 13 and the second structural member 14 may be configured as a truncated cone and spliced ​​together. The external shape of the vacuum enhancement part 1 may be inconsistent with the internal shape of the first structural member 13 and the second structural member 14, for example, it may be directly configured as a cylinder or other shapes. This configuration method can facilitate the processing and configuration of the vacuum enhancement part 1.

[0043] In some embodiments, the first opening 11 is arranged to be opened along the central axis of the second vacuum chamber 22 (eg Figure 5 As shown in FIG. 1 , the two ends of the vacuum enhancement part 1 that are far from each other are closed by the inner wall of the cavity wall of the second vacuum cavity 22. This is set to adapt to the shape of the cavity wall of the second vacuum cavity 22 in this embodiment, and to facilitate the setting of the first opening 11 and the second opening 12. The first opening 11 can also be opened close to one side of the second vacuum cavity 22, but it does not have to be parallel to the axial direction of the vacuum enhancement part 1. In other possible embodiments, such as Figure 6 As shown, the central axis of the first structural member 13 and the second structural member 14 may also form a certain angle, and at the same time, the first opening 11 and the second opening 12 are directed toward the middle area of ​​the second vacuum chamber 22. In other possible implementations, such as Figure 7 As shown, the first structural member 13 and the second structural member 14 can be Figure 5 The structure shown in FIG. 1 is different from the structure shown in FIG. 1 , but the first opening 11 and the second opening 12 are not located on the sides of the first structural member 13 and the second structural member 14 , but are directly disposed at the ends thereof that are away from each other.

[0044] In some embodiments, the central axis of the vacuum enhancement part 1 and the second vacuum chamber 22 are parallel to each other, so as to facilitate the arrangement and installation of the structure. However, it is not limited to setting the central axis of the vacuum enhancement part 1 and the second vacuum chamber 22 to be parallel.

[0045] In some embodiments, the Figure 2As shown, the vacuum enhancement part 1 includes at least two groups, each group includes at least one vacuum enhancement part 1, and each group of the vacuum enhancement parts 1 is symmetrically arranged on both sides of the third structural member 3. Correspondingly, the cavity wall of the second vacuum cavity 22 is respectively arranged corresponding to each group of vacuum enhancement parts 1, and the interiors of the second vacuum cavity 22 corresponding to the vacuum enhancement parts 1 are interconnected (that is, there is only one second vacuum cavity 22 for accommodating each vacuum enhancement part 1). Therefore, it is more conducive to gathering the gas pressurized by the vacuum enhancement part 1 and forming a relatively larger accommodation space, which not only increases the size of the vacuuming wind force during suction, but also can make the airflow impact force formed by breaking the vacuum when the equipment stops vacuuming greater.

[0046] In other possible implementations, the vacuum enhancement part 1 may be provided as only one group. In this case, each vacuum enhancement part may be provided in a uniform distribution, or the vacuum enhancement part 1 may be eccentrically provided on the third structural member 3 .

[0047] In some embodiments, the cross-sectional area of ​​the first opening 11 corresponding to the same vacuum enhancement part 1 is smaller than the cross-sectional area of ​​the second opening 12. By setting the opening size of the second opening 12 larger than the first opening 11, a larger airflow rate can be formed at the second opening 12 during vacuuming, and a larger airflow velocity and a higher suction force can be achieved after passing through the larger diameter area in the middle of the vacuum enhancement part 1 and then passing through the first opening 11 with a smaller opening.

[0048] See attached Figure 2 As shown, in some embodiments, the one located in the middle of each group of vacuum enhancement parts 1 is the highest in the axial direction, and the ones located on both sides thereof are gradually lowered. This is to facilitate the arrangement of a cavity wall structure of a second vacuum cavity 22 with a shape matching that of each group of vacuum enhancement parts 1. Because the space on both sides of the vacuum enhancement parts 1 near each group is relatively limited, the height thereof is arranged to be relatively small. Of course, the second vacuum cavity 22 can also be simply arranged to be a standard perfect circle or perfect sphere, so that the height of each vacuum enhancement part 1 can be kept consistent.

[0049] In other possible implementations, the size of each vacuum enhancement part 1 may be changed arbitrarily without any regularity.

[0050] In some embodiments, the sizes of the first openings 11 of the present application are somewhat different, and thus, the maximum suction force will inevitably be formed in one of the first openings 11. As a result, a cyclone force 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 efficiency of the vacuum enhancement mechanism of the present invention.

[0051] In some embodiments, the first opening 11 in the middle of each group of vacuum enhancement parts 1 is set to be the smallest, so that the suction force is the largest at this point, and a cyclone is formed. At the same time, the airflow in the first vacuum chamber 21 is driven to rotate, and a vortex is naturally formed in the first vacuum chamber 21. Obviously, it is not limited to forming the maximum suction force by the first opening 11 in the middle of the vacuum enhancement part 1, and other first openings 11 can also be set to the smallest to form the maximum suction force; or due to factors such as other objects in the first vacuum chamber 21 blocking, the maximum suction force is not formed at the originally expected smallest first opening 11, but the maximum suction force is formed at other first openings 11. These situations occur randomly. However, there must be a first opening 11 that can generate the maximum suction force and form a cyclone in the first vacuum chamber 21.

[0052] In some embodiments, there are multiple vacuum enhancement parts 1, which are arranged in a honeycomb shape around the motor. Accordingly, the cavity wall of the second vacuum cavity 22 is also arranged in a structural form to accommodate the vacuum enhancement parts 1 therein.

[0053] In some embodiments, the cavity wall of the second vacuum cavity 22 corresponding to each group of vacuum enhancement parts 1 is spherical, hemispherical or other shell shapes with rounded inner surfaces. Therefore, on the one hand, the external shape structure of the vacuum enhancement part 1 is matched, and the wind resistance caused by the shape of the shell to the gas in the second vacuum cavity 22 is minimized.

[0054] Implementation 2: The present embodiment is a structure for pushing and tightening the dust backflow prevention door 8 of a vacuum cleaner, which includes a vacuuming efficiency enhancement mechanism of the first embodiment. The structure for pushing and tightening the dust backflow prevention door 8 is used to push the dust backflow prevention door 8 (see the attached figure) disposed between the dust cup 4 and the dust suction duct 5. Figure 8 The force that closes the dust backflow prevention door 8 is a force that is opposite to the opening direction of the dust backflow prevention door 8 when the vacuum cleaner is performing a dust collection operation.

[0055] The pushing structure of the dust backflow prevention door 8 also includes a driving source for forming a vacuum suction force, and the suction port 23 of the driving source can be connected to the first opening 11 of the vacuum enhancement part 1. The cavity wall of the second vacuum chamber 22 of the vacuum enhancement mechanism is connected to the dust cup 4 through a transition connection shell 6. Of course, in some embodiments, it is not necessary to set up a transition connection shell 6 separately, and a shell extending toward the second vacuum chamber 22 is set at the end of the dust cup 4 close to the second vacuum chamber 22 and connected to the shell of the second vacuum chamber 22; or a shell extending toward the dust cup 4 is set at the end of the second vacuum chamber 22 close to the dust cup 4 and connected to the dust cup 4. The dust cup 4 forms the first vacuum chamber 21 of this embodiment.

[0056] In some embodiments, the driving source is a suction motor 7. A dust suction port is provided on one side of the dust suction duct 5 close to the dust cup 4, and a dust backflow prevention door 8 is provided at the dust suction port, which can be opened toward one side of the axial center of the dust cup 4 under the action of the vacuum force when the suction motor 7 is working. The dust backflow prevention door 8 can be made of rubber material or other materials with a certain deformation ability. Under normal circumstances, the dust backflow prevention door 8 itself has a certain elastic force to automatically close toward the dust suction port. If there is no foreign matter blocking the dust backflow prevention door 8 and the dust suction port, the dust backflow prevention door 8 can be automatically closed. However, if there is a large volume of foreign matter blocking it, the dust backflow prevention door 8 cannot automatically close by relying on its own elastic deformation force, thereby causing the dust in the dust cup 4 to leak through the dust suction port, and even leak out through the dust head of the vacuum cleaner, affecting the user's experience.

[0057] When the vacuum cleaner stops vacuuming, the internal vacuum environment of the vacuum cleaner will be quickly filled with outside air and the vacuum will be broken. At this time, after the vacuum cleaner stops vacuuming, the negative pressure space inside the vacuum cleaner is quickly filled with outside air (commonly known as the "broken vacuum" state). Outside air will quickly fill the dust cup 4 and the second vacuum chamber 22, and quickly flow in the direction of the dust backflow prevention door 8. At this time, since the second vacuum chamber 22 has a relatively large volume, at the same time, with the presence of the second vacuum chamber 22 and the various vacuum enhancement parts 1 arranged inside, a greater vacuum breaking force is formed, and the air flow flows in the direction of the dust backflow prevention door 8 and gives the dust cup 4 dust backflow prevention door 8 a greater driving force to close the door, thereby tightly covering the dust backflow prevention door 8, and there will be no dust leakage.

[0058] In some embodiments, the shell portion of the suction motor 7 at one end close to the second vacuum chamber 22 becomes a part of the cavity wall of the second vacuum chamber 22, so as to meet the original structural design habits of the vacuum cleaner without adjusting the original structure of the vacuum cleaner; at the same time, it also makes the motor and the dust cup 4 closer, reduces the energy loss caused by the too long path setting, and improves the efficiency of dust collection.

[0059] See attached Fig.10 and 11 As shown, in some embodiments, a cyclone separation part 9 is further provided in the middle of the dust cup 4, and one end of the cyclone separation part 9 away from the vacuum enhancement mechanism is a cyclone air inlet 91, and the other end is a cyclone air outlet 92. The cyclone separation part 9 includes a main cylinder 93, and a dust blocking net is provided on the outer surface of the main cylinder 93. Inside the main cylinder 93, a plurality of wind guide edges 94 are provided, which extend in a spiral manner along the inner wall of the main cylinder 93 toward one end close to the cyclone air outlet 92. The upper end of an wind guide edge 94 is arranged in an up-and-down staggered manner with the lower end of the wind guide edge 94 adjacent to it, and an air inlet 95 is formed between the two. The airflow passes through the air inlet 95, and under the guidance of the wind guide edge 94, it is sucked in a spiral manner toward one end close to the cyclone air outlet 92. Therefore, when the vacuum cleaner is performing vacuuming, the air carrying dust rotates in the dust cup 4 under the action of the cyclone separation part 9, and the dust is blocked in the dust cup 4. The airflow flows in a cyclonic manner toward one end of the vacuum enhancement mechanism, which is beneficial to the efficient separation of dust.

[0060] In some embodiments, a baffle 96 protruding in a direction away from the cyclone air outlet 92 is further provided at one end of the cyclone air inlet 91, and a certain hollow area is provided between the baffle 96 and the wind guide edge 94, so that the airflow can flow toward the air inlet 95 through the hollow area. The baffle 96 can guide the airflow entering the cyclone separation part 9 to the wind guide edge 94, so that the airflow is rotated and guided to flow toward one end of the cyclone air outlet 92. And under the guidance of the wind guide edge 94, it is sucked out to the cyclone air outlet 92.

[0061] Implementation three: This embodiment is a vacuum cleaner, which includes the pushing structure of the dust backflow prevention door 8 of the second embodiment.

[0062] The vacuum cleaner also includes a vacuum motor, one end of the vacuum motor close to the dust cup 4 is connected to the vacuum enhancement mechanism, and the outer shell of the vacuum motor and the cavity wall of the second vacuum chamber 22 together form a closed space.

[0063] In some embodiments, the vacuum enhancement part 1 is only one group, and each group includes one or more. When there are multiple vacuum enhancement parts, they can be arranged around the vacuum motor (not limited to being evenly distributed, such as being eccentrically arranged). Therefore, the present application cleverly utilizes the structural shape of the existing vacuum cleaner, and does not need to increase the space occupied by the vacuum enhancement part 1.

[0064] In some embodiments, the vacuum enhancement unit 1 includes at least two groups, which are symmetrically arranged on both sides of the vacuum cleaner connecting pipe. The vacuum cleaner connecting pipe here can be a vacuum pipe 5 (see the attached Fig.12As shown), it may also be a handle rod body, or other rod bodies used to connect the dust cup 4 and the dust suction motor to the vertical pole of the vacuum cleaner. Therefore, it will not hinder the original structural setting of the vacuum cleaner. In some embodiments, the vacuum enhancement part 1 is divided into two groups, which are arranged on both sides of the vacuum cleaner connecting pipe in a left-right symmetrical manner, ensuring the force balance in the handle area of ​​the vacuum cleaner and high aesthetics. In some embodiments, the vacuum enhancement part 1 is divided into three groups, and one group is arranged on both sides of the vertical pole of the vacuum cleaner, and the third group is arranged in the area opposite to the vertical pole of the vacuum cleaner, and is located in the middle of the vacuum enhancement parts 1 of the first two groups. Obviously, when the vacuum enhancement part is divided into two or more groups, it is not necessary to be limited to being symmetrically or evenly distributed on the vacuum cleaner.

[0065] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum enhancement mechanism, which cooperates with a vacuum driving 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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