Filter assembly structure and vacuum cleaner

Abstract

The present invention relates to a filter assembly structure and a vacuum cleaner, comprising: a filter element; a fitting having an inner cavity, an opening communicating with the inner cavity being formed on the fitting, a part of the filter element being assembled into the inner cavity from the opening, and a sealing cavity being defined between the filter element and the cavity wall of the inner cavity; when a force that urges the filter element to disengage from the fitting acts on the filter element, a pressure difference that urges the filter element to adsorb on the fitting is generated between the sealing cavity and the external space. When a force that urges the filter element to disengage from the fitting acts on the filter element, the volume of the sealing cavity increases, at this time the pressure in the sealing cavity decreases, and a pressure difference that urges the filter element to adsorb on the fitting will be generated between the sealing cavity and the external space, so that the filter element is not easily disengaged from the fitting.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal equipment, and particularly to a filter element assembly structure and a vacuum cleaner. Background Art

[0002] With the development of the economy and the progress of society, people are increasingly pursuing the quality of life. Among them, the cleanliness of the environment, as an important indicator to evaluate the quality of life, has received increasing attention from people. In order to improve the cleanliness of the environment, vacuum cleaners have emerged as the times require.

[0003] The filter element (HEPA) plays a role in efficiently filtering gas in a vacuum cleaner. Generally, a vacuum cleaner includes two filter elements. One filter element is assembled between a cyclone separator and a gas power mechanism (motor) to filter the gas entering the gas power mechanism from the cyclone separator, and the other filter element is assembled at the exhaust port of the vacuum cleaner to filter the gas discharged from the vacuum cleaner to the outside.

[0004] Traditional filter elements are generally installed on a vacuum cleaner by means of snap fasteners, screw fasteners or threaded connections. The above methods require snap fasteners or screw fasteners to be provided at the installation position of the filter element, or additional components (such as screws) are used for the installation of the filter element, resulting in a relatively complex assembly structure. Summary of the Invention

[0005] Based on this, in view of the problem of the relatively complex traditional assembly structure, it is necessary to provide a filter element assembly structure and a vacuum cleaner that can reduce the complexity of the assembly structure.

[0006] A filter element assembly structure includes:

[0007] A filter element;

[0008] A fitting with an inner cavity, an opening communicating with the inner cavity is formed on the fitting, a part of the filter element is hermetically assembled in the inner cavity from the opening, and a sealing cavity is defined between the filter element and the cavity wall of the inner cavity;

[0009] When the filter element is subjected to a force that causes it to disengage from the fitting, an air pressure difference is generated between the sealing cavity and the external space to adsorb the filter element on the fitting.

[0010] In one embodiment, an air flow hole communicating with the inner cavity is further formed on the fitting;

[0011] The filter element assembly structure further includes an opening and closing member disposed outside the air flow hole, and the opening and closing member is used to open or close the air flow hole;

[0012] When the pressure in the sealing cavity is greater than the pressure in the external space, the opening and closing member opens the air flow hole, and when the pressure in the sealing cavity is less than the pressure in the external space, the opening and closing member closes the air flow hole.

[0013] In one embodiment, one end of the opening and closing member is fixedly connected to the fitting, and the other end can elastically deform relative to the fitting to open or close the air flow hole; or the opening and closing member is movably connected to the fitting to open or close the air flow hole.

[0014] In one embodiment, the fitting includes a body and an extension portion. The inner cavity, the opening, and the air flow hole are all formed on the body, and the extension portion extends from the body.

[0015] Wherein, a first air flow cavity communicating with the air flow hole is defined among the opening and closing member, the body, and the extension portion, and the opening and closing member opens or closes the air flow hole by opening or closing the first air flow cavity.

[0016] In one embodiment, the end of the opening and closing member away from the body extends in a direction away from the air flow hole relative to the end connected to the body, and the extending direction of the opening and closing member is inclined with respect to the axial direction of the air flow hole.

[0017] In one embodiment, the fitting includes a first end and a second end opposite to each other. The opening is formed on the first end, and the air flow hole is formed on the second end. In one embodiment, the inner cavity is an annular cavity, and a part of the filter element is arranged in the inner cavity along the circumferential direction of the inner cavity.

[0018] In one embodiment, a second air flow cavity is further formed in the fitting, and the inner cavity surrounds the second air flow cavity.

[0019] The filter element includes a filter portion and an assembly portion connected to each other. The filter portion communicates with the second air flow cavity, and the assembly portion is assembled in the inner cavity. The air flow flowing in the second air flow cavity can apply a force to the filter element to urge it to disengage from the fitting.

[0020] In one embodiment, the filter element includes a filter portion and an assembly portion. The assembly portion includes a connecting portion and a sealing portion. The connecting portion is connected to the filter portion, and the sealing portion covers one end of the connecting portion away from the filter portion. The filter element is sealed between the sealing portion and the cavity wall of the inner cavity.

[0021] In one embodiment, there is an interference fit between the filter element and the cavity wall of the inner cavity.

[0022] A vacuum cleaner comprises the filter element assembly structure as described in any one of the above items.

[0023] In the above-mentioned filter assembly structure and vacuum cleaner, when the filter is subjected to a force that causes it to detach from the assembly part, the volume of the sealed cavity increases, and the pressure in the sealed cavity decreases. A pressure difference will be generated between the sealed cavity and the external space, causing the filter to be adsorbed on the assembly part, thereby making it difficult for the filter to detach from the assembly part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of a partial exploded view of a vacuum cleaner provided by an embodiment of the present invention;

[0025] Figure 2 for Figure 1 An enlarged view of point A of the vacuum cleaner shown in FIG.

[0026] Figure 3 for Figure 1 The assembly diagram of the vacuum cleaner shown in ;

[0027] Figure 4 for Figure 3 An enlarged view of point B of the vacuum cleaner shown in FIG.

[0028] Figure 5 for Figure 1 A structural diagram of a filter element of a vacuum cleaner shown in FIG.

[0029] Figure 6 for Figure 1 A partial assembly diagram of the vacuum cleaner shown in ;

[0030] Figure 7 for Figure 6 An enlarged view of point C of the vacuum cleaner shown in FIG.

[0031] Figure 8 A cross-sectional view of a vacuum cleaner provided in another embodiment of the present invention;

[0032] Figure 9 for Figure 8 An enlarged view of point D of the vacuum cleaner shown.

[0033] Vacuum cleaner 100 Filter element assembly structure 100 Filter element 10 Filter portion 11 Filter segment 111 Ventilation segment 112 Support frame 113 Assembly portion 12 Connecting portion 121 Sealing portion 122 Assembly member 20 Opening 21 Second airflow cavity 22 Body 23 Extension portion 24 Airflow hole 25 Sealing cavity 30 Opening and closing member 40 Fixing segment 41 Deformation segment 42 First airflow cavity 50 Gas power mechanism 300 DETAILED DESCRIPTION

[0034] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] Referring to Figure 1 , an embodiment of the present invention provides a vacuum cleaner 200, including a gas power mechanism 300 and a filter assembly structure 100. The gas power mechanism 300 drives air flow into the vacuum cleaner 200 for subsequent gas-dust separation. The filter 10 (described below) included in the filter assembly structure 100 can be used to filter the dust carried in the gas flowing from the cyclone separator to the front end of the gas power mechanism 300, and / or filter the dust carried in the gas discharged from the rear end of the gas power mechanism 300.

[0038] The filter assembly structure 100 includes a filter 10 and a fitting 20. As described above, the filter 10 is used to filter the dust carried in the gas flowing from the cyclone separator to the front end of the gas power mechanism 300, and / or filter the dust carried in the gas discharged from the rear end of the gas power mechanism 300. The fitting 20 is used to assemble the filter 10.

[0039] Taking the example that the filter 10 is used to filter the dust carried in the gas discharged from the rear end of the gas power mechanism 300, a detailed description will be given below.

[0040] Referring to Figure 2 , the fitting 20 has an inner cavity (not shown in the figure), and an opening 21 communicating with the inner cavity is also provided on the fitting 20. A part of the filter 10 is hermetically assembled in the inner cavity through the opening 21, and a sealing cavity 30 is defined between the filter 10 and the cavity wall of the inner cavity (referring toFigure 3 and Figure 4 ) When the filter element 10 is subjected to a force that causes it to disengage from the fitting 20, an air pressure difference is generated between the sealing cavity 30 and the external space, which causes the filter element 10 to be adsorbed onto the fitting 20.

[0041] That is, when the filter element 10 is assembled in the inner cavity, the pressure in the sealing cavity 30 is equal to the pressure in the external space. When the filter element 10 is subjected to a force that causes it to disengage from the fitting 20, the volume of the sealing cavity 30 increases. At this time, the pressure in the sealing cavity 30 decreases, and an air pressure difference will be generated between the sealing cavity 30 and the external space, which causes the filter element 10 to be adsorbed onto the fitting 20, so that the filter element 10 is not easily disengaged from the fitting 20.

[0042] Through the above setting method, the method of assembling the filter element 10 by using snap-fasteners, screw-fasteners or threaded connections is avoided, and additional components are avoided, making the structure of the vacuum cleaner 200 relatively simple; and in the above setting method, the assembly and sealing of the filter element 10 are combined together, and additional seals can be omitted, further simplifying the structure of the vacuum cleaner 200.

[0043] Refer to Figure 4 and Figure 5 , the filter element 10 includes a filtering part 11 and an assembling part 12. The assembling part 12 includes a connecting part 121 and a sealing part 122. The connecting part 121 is connected to the filtering part 11. The sealing part 122 covers one end of the connecting part 121 away from the filtering part 11, and the filter element 10 is sealed between the sealing part 122 and the cavity wall of the inner cavity.

[0044] Furthermore, in order to ensure that the filter element 10 is firmly fixed to the fitting 20 and ensure its sealing performance, the filter element 10 is in interference fit with the cavity wall of the inner cavity.

[0045] In one embodiment, the inner cavity is an annular cavity, and a part of the filter element 10 is arranged in the inner cavity along the circumferential direction of the sealing cavity 30. With such a setting, the space of the sealing cavity 30 defined between the filter element 10 and the cavity wall of the inner cavity can be relatively large. When the filter element 10 is subjected to a force that causes it to disengage from the fitting 20, the air pressure difference generated between the sealing cavity 30 and the external space is relatively large, thereby further ensuring the firmness of the filter element 10 fixed to the fitting 20.

[0046] Refer to Figure 4 , a second air flow cavity 22 is further formed in the fitting 20, and the inner cavity is arranged around the second air flow cavity 22. The filtering part 11 is communicated with the second air flow cavity 22, and the air flow discharged from the rear end of the gas power mechanism 300 can enter the second air flow cavity 22 to apply a force to the filter element 10 to cause the volume of the sealing cavity 30 to increase.

[0047] When the vacuum cleaner 200 is operating, the gas discharged from the rear end of the gas power mechanism 300 can enter the second air flow chamber 22 and flow towards the filter element 10 for filtration. When passing through the filtering part 11 of the filter element 10, due to the reduced flow area, the gas will accumulate to a certain extent in the filtering part 11. The accumulated gas will exert a force on the filter element 10, prompting the volume of the sealing chamber 30 to increase, thereby reducing the pressure in the sealing chamber 30 (at this time, the sealing chamber 30 is in a negative pressure state relative to the external space). An air pressure difference is generated between the sealing chamber 30 and the external space to adsorb the filter element 10 onto the fitting 10. When the greater the thrust of the gas on the filter element 10, the greater the suction force generated by the sealing chamber 30. When the thrust of the gas exerted on the filter element 10 is balanced with the suction force generated in the sealing chamber 30, the filter element 10 will be stably positioned, and the vacuum cleaner 200 is in a stable operating state.

[0048] Furthermore, the filtering part 11 includes a filtering section 111 and a ventilation section 112 arranged in sequence along the gas flow direction. The filtering section 111 is used to filter the dust carried in the gas, and the ventilation section 112 is used for the circulation between the filtered gas and the outside. A support frame 113 is connected between the filtering section 111 and the ventilation section 112 to increase the strength of the filter element 10 and prevent the filtering section 111 from being severely deformed under the action of the gas flow and causing failure.

[0049] Continue to refer to Figure 2 , in an embodiment, the fitting 20 is further provided with an air flow hole 25 communicating with the inner cavity, and the filter element assembly structure 100 further includes an opening and closing member 40 for opening or closing the air flow hole 25. When the pressure in the sealing chamber 30 is greater than the pressure in the external space, the opening and closing member 40 opens the air flow hole 25. When the pressure in the sealing chamber 30 is less than the pressure in the external space, the opening and closing member 40 closes the air flow hole 25.

[0050] With such a setting, the opening and closing member 40 functions as a one-way valve. That is, during the process of assembling the filter element 10 into the inner cavity, the volume of the sealing chamber 30 gradually decreases, and its internal pressure gradually increases. When the pressure in the sealing chamber 30 is greater than the pressure in the external space, the opening and closing member 40 opens the air flow hole 25 to discharge the gas in the sealing chamber 30 to the outside, so that the pressure in the sealing chamber 30 is balanced with the external space, facilitating the assembly of the filter element 10. When the pressure in the external space is greater than the pressure in the sealing chamber 30, the opening and closing member 40 closes the air flow hole 25. In this way, the pressure in the sealing chamber 30 will not change due to the pressure change in the external space, and its pressure is only related to the volume change of the sealing chamber 30.

[0051] It is conceivable that in some other embodiments, the air flow holes 25 and the opening and closing member 40 can also be omitted. For example, when assembling the filter element 10, the inner cavity can be made to be in a certain negative pressure state in advance so as to assemble the filter into the inner cavity. And when the filter element 10 is assembled into the inner cavity, since the volume of the inner cavity is compressed, the pressure in the sealing cavity 30 defined between the filter element 10 and the cavity wall of the inner cavity is equal to the pressure of the external space.

[0052] Specifically, the fitting 20 includes opposite first and second ends. The opening 21 is formed on the first end, and the air flow holes 25 are formed on the second end, that is, the air flow holes 25 are formed on the bottom wall of the inner cavity, so as to exhaust air from the air flow holes 25 when the filter element 10 is assembled into the inner cavity from the opening 21. It can be understood that in some other embodiments, the air flow holes 25 can also be formed on the side wall of the inner cavity, which is not limited herein.

[0053] Refer to Figure 6 and Figure 7 , in one embodiment, the opening and closing member 40 is arranged outside the air flow holes 25 for easy setting. It is conceivable that in some other embodiments, the opening and closing member 40 can also be arranged inside the air flow holes 25, which is not limited herein either.

[0054] Furthermore, the air flow holes 25 include a plurality of spaced-apart ones, and each air flow hole 25 is correspondingly provided with an opening and closing member 40 to facilitate the discharge of the gas in the sealing cavity 30. In some other embodiments, the air flow holes 25 can also include only one, and the opening and closing member 40 is correspondingly provided with one; or, the air flow holes 25 can also include a plurality of spaced-apart ones, and the opening and closing member 40 is provided with only one; or, the air flow holes 25 can also include a plurality of spaced-apart ones, and only one opening and closing member 40 is correspondingly provided for a plurality of all the air flow holes 25, which is not limited herein either.

[0055] In a specific embodiment, a part of the opening and closing member 40 is fixedly connected to the fitting 20, and the remaining part can elastically deform relative to the fitting 20 to open or close the air flow holes 25. It is conceivable that in some other embodiments, the opening and closing member 40 can also be movably connected to the fitting 20 to facilitate operating to open or close the air flow holes 25, which is not limited herein either.

[0056] Refer to Figure 8 and Figure 9 , in the first implementation manner, one end of the opening and closing member 40 is fixedly connected to the fitting 20, and the other end elastically deforms relative to the fitting 20 to open or close the air flow holes 25.

[0057] Further, the assembly 20 includes a body 23 and an extension 24. The inner cavity, the opening 21, and the air flow holes 25 are all formed on the body 23. The extension 24 extends from the body 23. A first air flow cavity 50 communicating with the air flow holes 25 is defined among the opening and closing member 40, the body 23, and the extension 24. The opening and closing member 40 opens or closes the air flow holes 25 by opening or closing the first air flow cavity 50.

[0058] Optionally, the end of the opening and closing member 40 away from the body 23 extends in a direction away from the air flow holes 25 relative to the end thereof connected to the body 23, and the extending direction of the opening and closing member 40 is inclined with respect to the axial direction of the air flow holes 25.

[0059] With such an arrangement, when the pressure in the sealing cavity 30 is greater than the pressure in the external space, the opening and closing member 40 is easy to open, and when the pressure in the external space is greater than the pressure in the sealing cavity 30, the sealing performance of the opening and closing member 40 for sealing the air flow holes 25 is stronger.

[0060] Continue to refer to Figure 2 In the second embodiment, the opening and closing member 40 includes a fixed section 41 and deformation sections 42 located at both ends of the fixed section 41. The fixed section 41 is fixedly connected to the assembly 20, and the deformation sections 42 can elastically deform relative to the assembly 20 to open or close the air flow holes 25.

[0061] An embodiment of the present invention further provides a filter assembly structure 100 included in the above-mentioned vacuum cleaner 200.

[0062] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0063] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A filter element assembly structure, characterized in that, Comprising: A filter element (10); An assembly (20) having an inner cavity, an opening (21) communicating with the inner cavity is formed on the assembly (20), a part of the filter element (10) is assembled into the inner cavity from the opening (21), and a sealing cavity (30) is defined between the filter element (10) and the cavity wall of the inner cavity; When the filter element (10) is subjected to a force that urges it to disengage from the assembly (20), a pressure difference is generated between the sealing cavity (30) and the external space to adsorb the filter element (10) onto the assembly (20).

2. The filter element assembly structure according to claim 1, wherein, The assembly (20) is further provided with an air flow hole (25) communicating with the inner cavity; The filter element assembly structure further includes an opening and closing member (40) disposed outside the air flow hole (25), and the opening and closing member (40) is used to open or close the air flow hole (25); When the pressure in the sealing cavity (30) is greater than the pressure in the external space, the opening and closing member (40) opens the air flow hole (25), and when the pressure in the sealing cavity (30) is less than the pressure in the external space, the opening and closing member (40) closes the air flow hole (25); The opening and closing member (40) is movably connected to the assembly (20) to open or close the air flow hole (25).

3. The filter element assembly structure according to claim 2, characterized in that, The assembly (20) is further provided with an air flow hole (25) communicating with the inner cavity; The filter element assembly structure further includes an opening and closing member (40) disposed outside the air flow hole (25), and the opening and closing member (40) is used to open or close the air flow hole (25); When the pressure in the sealing cavity (30) is greater than the pressure in the external space, the opening and closing member (40) opens the air flow hole (25), and when the pressure in the sealing cavity (30) is less than the pressure in the external space, the opening and closing member (40) closes the air flow hole (25); The assembly (20) includes a main body (23) and an extension portion (24), the inner cavity, the opening (21) and the air flow hole (25) are all formed on the main body (23), and the extension portion (24) extends along the main body (23); Wherein, a first air flow cavity (50) communicating with the air flow hole (25) is defined among the opening and closing member (40), the main body (23) and the extension portion (24), and the opening and closing member (40) opens or closes the air flow hole (25) by opening or closing the first air flow cavity (50).

4. The filter element assembly structure according to claim 3, characterized in that, One end of the opening and closing member (40) away from the main body (23) extends in a direction away from the air flow hole (25) relative to the end thereof connected to the main body (23), and the extending direction of the opening and closing member (40) is inclined with respect to the axial direction of the air flow hole (25).

5. The filter element assembly structure according to claim 1, characterized in that The inner cavity is an annular cavity, and a part of the filter element (10) is disposed in the inner cavity along the circumferential direction of the inner cavity.

6. The filter element assembly structure according to claim 1, wherein, A second air flow cavity (22) is further formed in the assembly (20), and the inner cavity surrounds the outside of the second air flow cavity (22); The filter element (10) comprises a filter portion (11) and an assembly portion (12) which are connected to each other. The filter portion (11) is in communication with the second airflow cavity (22). The assembly portion (12) is assembled in the inner cavity. The airflow flowing in the second airflow cavity (22) can exert a force on the filter element (10) to cause it to detach from the assembly portion (20).

7. The filter element assembly structure according to claim 1, characterized in that, The filter element (10) comprises a filter portion (11) and an assembly portion (12); the assembly portion (12) comprises a connecting portion (121) and a sealing portion (122); the connecting portion (121) is connected to the filter portion (11); the sealing portion (122) is wrapped around an end of the connecting portion (121) away from the filter portion (11); the filter element (10) is sealed with the cavity wall of the inner cavity via the sealing portion (122).

8. The filter element assembly structure according to claim 1, wherein The filter element (10) is interference-fitted with the cavity wall of the inner cavity.

9. A vacuum cleaner, characterized in that, The invention comprises a filter element assembly structure as described in any one of claims 1 to 8.

Images