Valve mechanism for suction device filter and suction device

Abstract

The utility model discloses a valve mechanism for a filter of a suction device. The valve mechanism comprises a valve seat (11), a valve rod (12) and a valve rod (13), wherein a cavity (111) is formed in the valve seat (11); the valve rod assembly comprises a valve rod (21) which is arranged on the valve seat in an openable mode, and the valve rod can be switched between an opening station and a closing station relative to the valve seat; the sealing element is arranged between the valve rod and the valve seat and at least comprises a first sealing element (31) and a second sealing element (32); wherein at the opening station, flow path openings are formed between the valve rod and the valve seat, the flow path openings at least comprise a first flow path opening (P1) and a second flow path opening (P2), and when a motor of the suction device works, fluid enters the cavity from the external environment at least through the first flow path opening and the second flow path opening and flows to the filter from the cavity. The blowing device is used for blowing and cleaning the filter; in the closing station, the valve rod and the valve seat are attached in a sealed mode through a sealing element so as to close the flow path opening.

Description

Technical Field

[0001] The utility model relates to a valve mechanism, in particular to a purging mechanism for a suction device. Background Art

[0002] Suction devices are widely used in daily production and life. A suction motor provided in the device generates negative pressure inside the device, so that the object to be sucked outside the device is sucked into the dust collection cavity inside the housing of the suction device along with the air flow. Since a large amount of dust is often sucked in during the operation of the suction device, a filter is usually provided beside the dust collection cavity of the suction device.

[0003] After the suction device has been used for a certain period of time, a lot of dust often accumulates on the filter, resulting in blockage of the filter. During the dust suction process, the air performance will decrease due to the blockage of the filter. Therefore, a cleaning device or mechanism needs to be provided to clean the filter.

[0004] In order to save energy consumption, whether the valve mechanism is put into the cleaning process is often controlled by a corresponding switch component. Therefore, it is desirable to provide a valve mechanism that can effectively clean the filter of the suction device. Summary of the Utility Model

[0005] One of the purposes of the present utility model is to provide a valve mechanism for a filter of a suction device, which can powerfully purge and clean the filter during the operation of the suction device, so as to obtain excellent cleaning effects.

[0006] To achieve the above purpose, the present utility model provides a valve mechanism for a filter of a suction device, which includes:

[0007] A valve seat, which is provided with a cavity inside, and the cavity is used to be in fluid communication with the motor cavity and the filter of the suction device respectively;

[0008] A valve stem assembly, which includes a valve stem that is openably provided on the valve seat, and the valve stem can be switched between an open position and a closed position relative to the valve seat;

[0009] A sealing element, which is provided between the valve stem and the valve seat, and the sealing element at least includes a first sealing element and a second sealing element;

[0010] Wherein in the open position, a flow path opening is formed between the valve stem and the valve seat, and the flow path opening at least includes a first flow path opening and a second flow path opening. When the motor of the suction device works, fluid enters the cavity from the external environment at least through the first flow path opening and the second flow path opening, and flows from the cavity to the filter for purging and cleaning the filter;

[0011] Wherein, at the closing station, the valve stem and the valve seat are sealingly fitted through the sealing element to close the flow path opening.

[0012] Further, in some embodiments of the present invention, the sealing surfaces of the sealing elements are in the same plane.

[0013] Further, in some embodiments of the present invention, the first sealing element and the second sealing element are both provided as sealing rings. The first sealing element and the second sealing element are coaxially arranged and are respectively arranged on the outer circle and the inner circle in the radial direction of the valve stem.

[0014] Further, in some embodiments of the present invention, the first sealing element and / or the second sealing element is arranged on the valve stem.

[0015] Further, in some embodiments of the present invention, the first sealing element includes a first support portion arranged in a first card slot of the valve stem and a first cantilever portion radially extending from the valve stem; and / or the second sealing element includes a second support portion arranged in a second card slot of the valve stem and a second cantilever portion radially extending from the valve stem.

[0016] Further, in some embodiments of the present invention, the valve stem includes a valve stem body and an end baffle. The first sealing element and the second sealing element are both arranged between the valve stem body and the end baffle.

[0017] Further, in some embodiments of the present invention, there is a first gap between the end baffle and the first sealing element; and / or there is a second gap between the end baffle and the second sealing element.

[0018] Further, in some embodiments of the present invention, a first length by which the first sealing element extends from the radial outer edge of the end baffle is greater than the gap between the end baffle and the valve seat; and / or a second length by which the second sealing element extends from the radial outer edge of the end baffle is greater than the gap between the end baffle and the valve seat.

[0019] Further, in some embodiments of the present invention, the valve stem assembly further includes an opening and closing element connected to the valve stem. The opening and closing element drives the valve stem to switch between the opening station and the closing station.

[0020] Further, in some embodiments of the present invention, the opening and closing element includes an electromagnet.

[0021] Further, in some embodiments of the present invention, the valve mechanism further includes a control element, which is connected to the opening and closing element to send an opening signal and a closing signal to the opening and closing element.

[0022] Furthermore, in some embodiments of the present utility model, the valve stem assembly further includes an elastic element that applies an elastic force to the valve stem to urge it towards the closed position.

[0023] Another object of the present utility model is to provide a suction device that can achieve an efficient and powerful self-cleaning function.

[0024] Based on the above object, the present utility model further provides a suction device, which includes a housing. A dust collection chamber, a motor chamber, and a filter are provided inside the housing. The dust collection chamber is located on the dust collection side of the filter, and a valve mechanism as described above is provided in the accommodation space on the cleaning side opposite to the dust collection side of the filter.

[0025] By adopting the above structure, when the filter of the suction device needs to be purged, the valve mechanism can obtain a greater purging force when it is opened, thereby improving the cleaning efficiency and further enhancing the cleaning effect.

[0026] Due to the adoption of the above valve mechanism, the suction device of the present utility model can reduce the energy consumption during use while achieving a better cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shows a schematic structural diagram of a suction device.

[0028] Figure 2 Shows an external three-dimensional structural diagram of the valve mechanism of the present utility model in one embodiment.

[0029] Figure 3 Shows an internal structural diagram of the valve mechanism of the present utility model in one embodiment in the open position from a sectional perspective.

[0030] Figure 4 Shows an internal structural diagram of the valve mechanism of the present utility model in one embodiment in the closed position from a sectional perspective.

[0031] Figure 5 Shows the mating relationship of the valve stem, the sealing element, and the valve seat of the valve mechanism of the present utility model in one embodiment in the closed position in a partially enlarged view from a planar perspective.

[0032] Figure 6 Shows the mating relationship of the valve stem, the sealing element, and the valve seat of the valve mechanism of the present utility model in one embodiment in the open position in a partially enlarged view from a three-dimensional perspective.

[0033] Figure 7Schematically shows the internal structure of the suction device according to the present utility model in an embodiment. Detailed Embodiment

[0034] The following will further explain and illustrate the valve mechanism and the suction device according to the present utility model in conjunction with the accompanying drawings of the specification and specific embodiments. However, such explanation and illustration shall not unduly limit the technical solution of the present utility model.

[0035] Figure 1 Shows a suction device 100 adopted in daily production and life. The suction device 100 includes a housing 101. A dust collection chamber 105 is provided inside the housing 101. The dust collection chamber 105 is conductively connected to an intake air duct 103 through a port 102 on the housing 101. A suction motor for achieving suction is arranged in a motor chamber 104. When the suction device 100 is working, the suction motor starts, thereby generating a negative pressure inside the housing, and then sucking the object to be sucked along with the air flow into the dust collection chamber 105 of the suction device. Since a large amount of dust is often sucked in during the working process of the suction device, a filter 106 is often required to be arranged beside the dust collection chamber 105 of the suction device.

[0036] After being used for a period of time, a lot of dust often accumulates on the dust collection side 1061 of the filter 106, resulting in blockage of the filter, and further affecting the air performance and suction effect of the suction device. Therefore, a valve mechanism 1 arranged on the cleaning side 1062 opposite to the dust collection side 1061 of the filter is used to clean the filter.

[0037] The present utility model expects to provide a valve mechanism that can provide a greater purging force, thereby improving the purging and cleaning effect.

[0038] To achieve the above object, the present utility model proposes a valve mechanism for a filter of a suction device in an embodiment.

[0039] Figure 2 Shows a schematic external three-dimensional structure diagram of the valve mechanism according to the present utility model in an embodiment.

[0040] Figure 3 Shows a schematic internal structure diagram of the valve mechanism according to the present utility model in an open working position from a sectional perspective.

[0041] Figure 4 Shows a schematic internal structure diagram of the valve mechanism according to the present utility model in a closed working position from a sectional perspective.

[0042] As Figure 2 、 Figure 3 and Figure 4As shown, in some embodiments, the valve mechanism 1 may include:

[0043] A valve seat 11 having a cavity 111 therein, the cavity 111 being used to be in fluid communication with the motor cavity 104 and the filter 106 of the suction device respectively; a valve stem assembly, which includes a valve stem 21 openably disposed on the valve seat 11, and the valve stem 21 can be switched between an open position and a closed position relative to the valve seat; the sealing elements at least include a first sealing element 31 and a second sealing element 32, both of which are disposed between the valve stem 21 and the valve seat 11.

[0044] As Figure 3 shown, in the open position, the valve stem 21, the first sealing element 31, and the second sealing element 32 leave the upper end surface of the valve seat 11, so that at least a first flow path opening P1 and a second flow path opening P2 are formed between the valve stem 21 and the valve seat 11. Both the first flow path opening P1 and the second flow path opening P2 are located between the lower end surface of the valve stem 21 and the upper end surface of the valve seat 11.

[0045] Since the cavity 111 is in communication with the motor cavity of the suction device, when the motor of the suction device works, a negative pressure will be established in the cavity 111, and the external environment E is a positive pressure approximately equal to the atmospheric pressure. Therefore, once the valve stem 21 is opened relative to the valve seat 11, the fluid will enter the cavity 111 from the external environment E at least via the first flow path opening P1 and the second flow path opening P2, so that the state in the cavity 111 is converted from a negative pressure state to a state approximately equal to the atmospheric pressure. Also, since the dust collection side and the dust collection cavity of the filter (i.e., below the filter in the figure) are also in a negative pressure, the fluid will flow from the cavity 111 to the filter 106, thereby purging and cleaning the filter.

[0046] By simultaneously providing at least the first sealing element 31 and the second sealing element 32 corresponding to the first flow path opening P1 and the second flow path opening P2, the present utility model multiplicatively increases the blowing perimeter of the fluid passing through the flow path opening, forming at least two counter-blowing airflows, so that the airflow for purging the filter is stronger, and thus greatly improves the purging efficiency and purging effect.

[0047] As Figure 4 shown, in the closed position, the valve stem 21 and the valve seat 11 are sealingly fitted through the sealing elements at least including the first sealing element 31 and the second sealing element 32, so as to close the flow path openings (at least including the first flow path opening and the second flow path opening) that conduct the external environment E and the cavity 111. In this case, the cavity 111 is in communication with the motor cavity, and the pressure in the cavity 111 is negative.

[0048] It should be noted that, in some other embodiments, the present utility model may also be provided with more than two sealing elements, such as further including a third sealing element, a fourth sealing element or several other sealing elements.

[0049] In some more specific embodiments, the sealing surfaces of the respective sealing elements are in the same plane, thereby achieving a better sealing effect with a more concise structural design. For example, in the embodiments as shown in Figure 4 and Figure 5 , the sealing surface of the first sealing element 31 (i.e., the lower end surface where the first sealing element contacts the upper surface of the valve seat) and the sealing surface of the second sealing element 32 (i.e., the lower end surface where the second sealing element contacts the upper surface of the valve seat) are in the same plane.

[0050] In some more specific embodiments, the sealing elements that at least include the first sealing element and the second sealing element can be sealing rings. As shown in Figure 4 , Figure 5 and Figure 6 , the first sealing element 31 and the second sealing element 32 are respectively arranged on the outer ring and the inner ring in the radial direction of the valve stem. This setting method enables at least two sealing elements to be respectively arranged on the inner ring and the outer ring of the valve stem, thereby forming two annular flow paths on the inner side and the outer side of the valve stem respectively, and further achieving a better purging effect while having less part processing amount and a concise design.

[0051] In some more specific embodiments, the respective sealing elements, such as the first sealing element 31 and the second sealing element 32, can be coaxially arranged. Of course, in other alternative embodiments, the respective sealing elements, such as the first sealing element 31 and the second sealing element 32, can also be non - coaxially arranged.

[0052] In some more specific embodiments, the sealing elements that at least include the first sealing element and the second sealing element can be circular.

[0053] In other more specific embodiments, the sealing elements that at least include the first sealing element and the second sealing element can be elliptical, rectangular or other similar shapes.

[0054] In some more specific embodiments, as shown in Figure 4 , Figure 5 and Figure 6 , both the first sealing element 31 and the second sealing element 32 are arranged on the valve stem 21.

[0055] In some other alternative embodiments, both the first sealing element 31 and the second sealing element 32 can also be arranged on the valve seat 11, for example, on the upper end surface of the valve seat 11.

[0056] Both the first sealing element and the second sealing element are arranged on the valve stem or the valve seat, making the structure of the valve mechanism more concise and more convenient for the manufacturing and processing of the valve mechanism.

[0057] In some other alternative embodiments, one of the first sealing element 31 and the second sealing element 32 may be disposed on the valve stem, and the other may be disposed on the valve seat 11.

[0058] When both the first sealing element and the second sealing element are disposed on the valve stem, in some more specific embodiments, as Figure 5 and Figure 6 shown, the first sealing element 31 includes a first support portion 311 disposed in the first card slot 213 of the valve stem and a first cantilever portion 312 radially extending from the valve stem. Similarly, the second sealing element 32 includes a second support portion 321 disposed in the second card slot 214 of the valve stem and a second cantilever portion 322 radially extending from the valve stem.

[0059] In addition, as Figure 4 , Figure 5 and Figure 6 shown, in some embodiments of the present invention, the valve stem 21 includes a valve stem body 211 and an end baffle 212. Both the first sealing element 31 and the second sealing element 32 are disposed between the valve stem body 211 and the end baffle 212. Thus, the end baffle 212 can provide certain support for the first sealing element and the second sealing element.

[0060] In some more specific embodiments, as Figure 5 shown, there is a first gap G1 between the upper end surface of the end baffle 212 and the lower end surface of the first sealing element 31. And / or there is a second gap G2 between the upper end surface of the end baffle 212 and the lower end surface of the second sealing element 32. This gap is provided because: when the valve stem is in the closed position, under the internal and external pressure difference between the external environment and the cavity 111, the flexible sealing element will tightly press on the valve seat, so that its edge has a slightly upward warped deformation. When changing from the closed position to the open position, setting this gap can facilitate the reverse reset elastic deformation of the sealing element.

[0061] In some more specific embodiments, as Figure 6 shown, the first length L1 by which the first sealing element 31 extends from the radial outer edge of the end baffle 212 is greater than the gap between the end baffle and the valve seat; and / or the second length L2 by which the second sealing element 32 extends from the radial outer edge of the end baffle 212 is greater than the gap between the lower end surface of the end baffle 212 and the upper end surface of the valve seat 11. By this setting method, it can effectively prevent the edge of the seal (such as the edges of the first sealing element and the second sealing element) from being sucked into the valve seat under the condition of a strong purging force.

[0062] In some embodiments of the present invention, as Figure 3 and Figure 4As shown, the valve stem assembly further includes a closing and opening element 22 connected to the valve stem 21. The closing and opening element 22 drives the valve stem 21 to switch between an open position and a closed position, for example, moving in the height direction to switch between the open position and the closed position.

[0063] In some more specific embodiments, the closing and opening element 22 may include an electromagnet. In some other more specific embodiments, the closing and opening element 22 may also be a permanent magnet. In still other more specific embodiments, the closing and opening element may also be a mechanical component, such as a lever handle.

[0064] When the closing and opening element includes an electromagnet, in some embodiments, the valve mechanism may further include a control element connected to the closing and opening element 22 to control the opening and closing of the valve stem by the closing and opening element. By providing the control element, the valve stem can be further intermittently opened at a set time interval as needed, or the opening of the valve stem can be controlled according to the information on the dust accumulation degree of the filter transmitted by the sensor on the filter, so as to realize the automatic cleaning of the filter.

[0065] For example, when the closing and opening element is set to include at least an electromagnet, the control element may include an electric control element connected to the electromagnet, and the electric control element can control whether the electromagnet applies or does not apply an electromagnetic force to the valve stem by controlling the conduction or cut-off of the current.

[0066] Again, for example, when the closing and opening element is set to include at least a mechanical component, the control element may include a motor or a cylinder, a hydraulic cylinder or a similar power device.

[0067] In some embodiments of the present invention, as Figure 4 shown, the valve stem assembly may further include an elastic element 23 that applies an elastic force to the valve stem to make it tend to the closed position. In a more specific example, the elastic element 23 may be a helical spring. In this way, when the opening force is removed, the valve stem 21 can be reset to the closed position under the elastic action of the elastic element 23.

[0068] Of course, in other alternative embodiments, the elastic element may not be provided, and when the opening force is removed, the valve stem 21 can also gradually return to the closed position under the action of its own gravity.

[0069] In another embodiment of the present invention, a suction device 100 is further provided, as Figure 7 shown, which includes a housing 101. A dust collection chamber 105, a motor chamber 104 provided with a suction motor, and a filter 106 are provided inside the housing. The dust collection chamber is located on the dust collection side 1061 of the filter 106, and a valve mechanism 1 as described above is provided in the accommodation space of the cleaning side 1062 opposite to the dust collection side 1061 of the filter 106.

[0070] Since the arrangement state and working state of the valve mechanism 1 in the suction device 100 have been described in detail above, a repeated description will not be given here.

[0071] The valve mechanism of the utility model adopts the above structure, so that when the filter of the suction device needs to be purged, a greater purging force can be obtained by opening the valve mechanism, thereby improving the cleaning efficiency and further enhancing the cleaning effect.

[0072] The suction device of the utility model adopts the valve mechanism, which can reduce energy consumption while achieving a better cleaning effect.

[0073] It should be noted that the prior art part in the protection scope of the utility model is not limited to the embodiments given in the application documents. All prior art that does not contradict the scheme of the utility model, including but not limited to prior patent documents, prior public publications, prior public uses, etc., can be included in the protection scope of the utility model.

[0074] In addition, the combination of the various technical features in this case is not limited to the combination described in the claims of this case or the combination described in the specific embodiments. All technical features recorded in this case can be freely combined or combined in any way unless there is a contradiction between them.

[0075] It should also be noted that the above-listed embodiments are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and similar changes or modifications made therewith are directly derived or easily associated with the contents disclosed by those skilled in the art from the present invention, and should all fall within the protection scope of the present invention.

Claims

1. A valve mechanism for a suction device filter, characterized in that: include: A valve seat (11) having a cavity (111) therein, the cavity being used for fluid communication with a motor cavity and a filter of a suction device respectively; A valve stem assembly, comprising a valve stem (21) openably disposed on the valve seat, wherein the valve stem can be switched between an open position and a closed position relative to the valve seat; A sealing element, which is arranged between the valve stem and the valve seat, and the sealing element at least comprises a first sealing element (31) and a second sealing element (32); wherein at the open position, a flow path opening is formed between the valve stem and the valve seat, the flow path opening at least comprising a first flow path opening (P1) and a second flow path opening (P2), and when the motor of the suction device is working, fluid enters the cavity from the external environment at least through the first flow path opening and the second flow path opening, and flows from the cavity to the filter, so as to purge and clean the filter; Wherein, in the closing position, the valve stem and the valve seat are sealingly fitted through the sealing element to close the flow path opening.

2. The valve mechanism according to claim 1, characterized in that: The sealing surfaces of the sealing elements are in the same plane.

3. The valve mechanism according to claim 1, characterized in that: The first sealing element (31) and the second sealing element (32) are both configured as sealing rings, and the first sealing element and the second sealing element are coaxially arranged.

4. The valve mechanism according to claim 1, characterized in that: The first sealing element (31) and / or the second sealing element (32) are arranged on the valve stem.

5. The valve mechanism according to claim 4, characterized in that: The first sealing element (31) comprises a first supporting portion (311) disposed in a first retaining groove (213) of the valve stem and a first cantilever portion (312) extending radially from the valve stem; and / or the second sealing element (32) comprises a second supporting portion (321) disposed in a second retaining groove (214) of the valve stem and a second cantilever portion (322) extending radially from the valve stem.

6. The valve mechanism according to claim 1, characterized in that: The valve stem (21) comprises a valve stem body (211) and an end baffle (212), and the first sealing element and the second sealing element are both arranged between the valve stem body and the end baffle.

7. The valve mechanism according to claim 6, characterized in that A first gap (G1) is provided between the end baffle (212) and the first sealing element (31); and / or a second gap (G2) is provided between the end baffle (212) and the second sealing element (32).

8. The valve mechanism according to claim 6, characterized in that: A first length (L1) of the first sealing element extending from the radial outer edge of the end baffle is greater than a gap between the end baffle and the valve seat; and / or a second length (L2) of the second sealing element extending from the radial outer edge of the end baffle is greater than the gap between the end baffle and the valve seat.

9. The valve mechanism according to claim 1, wherein: The valve stem assembly also includes an opening and closing element (22) connected to the valve stem, and the opening and closing element drives the valve stem to switch between an open position and a closed position.

10. The valve mechanism according to claim 9, characterized in that The opening and closing element (22) comprises an electromagnet.

11. The valve mechanism according to claim 9, characterized in that It also comprises a control element which is connected to the opening and closing element (22) to control the opening and closing element to open and close the valve stem.

12. The valve mechanism according to claim 1, wherein: The valve stem assembly further comprises an elastic element (23) which applies an elastic force to the valve stem to make it tend toward a closed position.

13. A suction device (100), comprising a housing (101), wherein a dust collecting chamber (105), a motor chamber (104) and a filter (106) are arranged in the housing, wherein the dust collecting chamber (105) is located on the dust collecting side (1061) of the filter, and characterized in that: A valve mechanism (1) as claimed in any one of claims 1 to 12 is provided in the accommodation space on the cleaning side (1062) of the housing opposite to the dust collecting side of the filter.

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