Valve mechanism for cleaning filter of suction device and suction device

Abstract

The utility model discloses a valve mechanism for cleaning a filter of a suction device, which comprises a shell (1), a valve (2) and a valve (3), the shell (1) is internally provided with a cavity (11), and the cavity is used for being respectively communicated with a motor cavity of the suction device and the filter through fluid; the valve rod assembly comprises a valve rod (21) which is arranged on the shell in an openable mode, in the open state of the valve rod, the cavity is in fluid communication with the external environment, and fluid flows to the filter from the cavity so as to be used for cleaning the filter; one end of the first elastic element (3) is connected with the valve rod; the opening assembly (4) comprises an opening element (41), and the opening element is connected with the other end of the first elastic element; when external force is applied to the opening element, the opening element moves to enable the first elastic element to generate elastic deformation, so that elastic force used for accelerating opening of the valve rod is applied to the valve rod.

Description

Technical Field

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

[0002] Suction devices are widely used in daily production and life. A suction motor disposed in the device generates negative pressure in the device, thereby sucking the suctioned objects outside the device into the dust collecting chamber in the housing of the suction device along with the airflow. Since the suction device often sucks a lot of dust during its operation, a filter is often required to be disposed beside the dust collecting chamber of the suction device.

[0003] After the suction device has been used for a certain period of time, a lot of dust tends to accumulate on the filter, causing the filter to become clogged. During the vacuuming process, the air performance will decrease due to the clogged filter. Therefore, a cleaning device or mechanism is required to clean the filter.

[0004] In order to save energy, whether the cleaning mechanism is put into the cleaning process is often controlled by a corresponding valve assembly. Therefore, it is desired to provide a valve mechanism that can be put into use more efficiently and quickly. Utility Model Content

[0005] One of the purposes of the utility model is to provide a valve mechanism for cleaning a filter of a suction device, which can start cleaning the filter efficiently and quickly.

[0006] In order to achieve the above object, the utility model proposes a valve mechanism for cleaning a filter of a suction device, which comprises:

[0007] a housing having a cavity therein, the cavity being used for fluid communication with a motor cavity and a filter of the suction device, respectively;

[0008] A valve stem assembly, comprising a valve stem openably disposed on the housing, wherein in an open state of the valve stem, the cavity is in fluid communication with an external environment, and the fluid flows from the cavity to the filter for cleaning the filter;

[0009] A first elastic element, one end of which is connected to the valve stem;

[0010] An opening assembly comprises an opening element connected to the other end of a first elastic element; when an external force is applied to the opening element, movement of the opening element causes the first elastic element to undergo elastic deformation, so as to apply an elastic force to the valve stem for accelerating the opening of the valve stem.

[0011] Furthermore, in some embodiments of the present invention, the first elastic element includes a force storage spring, wherein when an external force is applied to the opening element, the movement of the opening element stretches the force storage spring to apply an elastic force to the valve stem for accelerating the opening of the valve stem.

[0012] Furthermore, in some embodiments of the present invention, the opening assembly further includes a second elastic element, which is configured to apply a restoring force to the opening element.

[0013] Furthermore, in some embodiments of the present invention, the direction in which the opening element is subjected to the external force is different from the direction in which the first elastic element is elastically deformed.

[0014] Furthermore, in some embodiments of the present invention, the opening element is configured as a button, and the lower end of the button has a wedge-shaped surface; the opening component also includes a wedge-shaped block adaptively abutting against the wedge-shaped surface, and the second elastic element is connected to the wedge-shaped block.

[0015] Furthermore, in some embodiments of the present invention, the opening assembly further includes a guide element, and the guide element provides a guide for the movement of the opening element.

[0016] Furthermore, in some embodiments of the present invention, the opening element is connected to a control element, and the control element applies the external force to the opening element to control the movement of the opening element.

[0017] Furthermore, in some embodiments of the present invention, the valve stem assembly further includes a connecting rod slidably connected to the valve stem, the opening element is connected to the connecting rod, and the opening element is connected to the other end of the first elastic element via the connecting rod.

[0018] Furthermore, in some embodiments of the utility model, the opening component also includes: a locking piece connected to the opening element, the locking piece having a locking position and an unlocking position, wherein in the locking position, the locking piece abuts against the valve stem to prevent the valve stem from opening; when an external force is applied to the opening element, the movement of the opening element drives the locking piece to switch to the unlocking position where it is disengaged from the valve stem.

[0019] Furthermore, in some embodiments of the present invention, the locking member includes a lever, which is rotatably arranged through a rotating shaft to switch between a locking position and an unlocking position, the head end of the lever is associated with the valve stem, and the tail end of the lever is associated with the opening element.

[0020] Furthermore, in some embodiments of the present invention, a groove is provided on the opening element, and the tail end of the lever is disposed in the groove. As the opening element moves, the wall of the groove presses the tail end of the lever to rotate the lever around the rotating axis.

[0021] Another object of the utility model is to provide a suction device which can realize a self-cleaning function with high efficiency and labor saving.

[0022] Based on the above purpose, the utility model also provides a suction device, which includes a shell, in which a dust collecting chamber, a motor chamber and a filter are provided, wherein the dust collecting chamber is located on the dust collecting side of the filter, and the valve mechanism described above is provided in the accommodating space on the cleaning side of the shell opposite to the dust collecting side of the filter.

[0023] The valve mechanism described in the utility model can make the valve open more quickly. When the filter needs to be cleaned, the valve stem can be switched from the closing position to the opening position at a faster speed, thereby greatly improving work efficiency.

[0024] The valve mechanism of the utility model has a simple structure and low cost and is compatible with the current cleaning structure.

[0025] The suction device of the utility model can reduce energy consumption due to the adoption of the valve mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a suction device is shown.

[0027] Figure 2 A schematic diagram of the external structure of the valve mechanism described in the utility model in one embodiment is shown.

[0028] Figure 3 A schematic diagram of the internal structure of the valve mechanism of the utility model in one embodiment is shown from a cross-sectional perspective.

[0029] Figure 4 The state of the valve stem of the valve mechanism described in the utility model in a closed state is shown from a cross-sectional perspective in one embodiment.

[0030] Figure 5 The state of the opening element of the valve mechanism described in the utility model under the state of being subjected to external force in one embodiment is shown from a cross-sectional perspective.

[0031] Figure 6 The state of the valve stem of the valve mechanism described in the utility model in an open position is shown from a cross-sectional perspective in one embodiment.

[0032] Figure 7A schematic diagram of the internal structure of the valve mechanism of the utility model in another embodiment is shown from a cross-sectional perspective.

[0033] Figure 8 The state of the valve rod of the valve mechanism described in the utility model in a closed state in another embodiment is shown in a cross-sectional view.

[0034] Fig. 9 The state of the opening element of the valve mechanism described in the utility model under the state of being subjected to external force in another embodiment is shown from a cross-sectional perspective.

[0035] Fig.10 The state of the valve stem of the valve mechanism described in the utility model in another embodiment in the open position is shown in a cross-sectional view. DETAILED DESCRIPTION

[0036] The valve mechanism and the suction device described in the utility model will be further explained and illustrated below in conjunction with the drawings and specific embodiments of the specification. However, such explanation and illustration do not constitute an improper limitation on the technical solution of the utility model.

[0037] Figure 1 A suction device 100 used in daily production and life is shown. The suction device 100 includes a housing 101, a dust collecting chamber 105 is provided in the housing 101, the dust collecting chamber 105 is connected to the air intake duct 103 through a port 102 on the housing 101, and a suction motor for suction is provided in a motor chamber 104. When the suction device 100 is working, the suction motor is started, thereby generating negative pressure in the housing, and then the sucked object is sucked into the dust collecting chamber 105 of the suction device along with the air flow. Since the suction device often sucks a lot of dust during its working process, a filter 106 is often required to be provided beside the dust collecting chamber 105 of the suction device.

[0038] After a period of use, the dust collecting side 1061 of the filter 106 tends to accumulate a lot of dust, which causes the filter to be blocked, thereby affecting the air performance and suction effect of the suction device. Therefore, a mechanism disposed on the cleaning side 1062 opposite to the dust collecting side 1061 of the filter is used to clean the filter.

[0039] The utility model hopes to provide a valve mechanism which can be opened quickly when the filter needs to be cleaned, so as to be put into use quickly.

[0040] In order to achieve the above object, the utility model provides a valve mechanism for cleaning a filter of a suction device in one embodiment.

[0041] Figure 2A schematic diagram of the external structure of the valve mechanism described in the utility model in one embodiment is shown.

[0042] Figure 3 A schematic diagram of the internal structure of the valve mechanism described in the utility model in one embodiment is shown.

[0043] like Figure 2 and Figure 3 As shown, in one embodiment, the valve mechanism may include:

[0044] A housing 1 is provided with a cavity 11 therein, the cavity 11 is used to communicate with the motor cavity fluid of the suction device through a first port 12, and is used to communicate with the filter fluid of the suction device through a second port 13; a valve stem assembly, which includes a valve stem 21 which is openably arranged on the housing 1, wherein when the valve stem 21 is in an open state, the cavity 11 is in fluid communication with the external environment, so that the fluid can flow from the cavity to the filter, so as to clean the filter 106; a first elastic element 3, one end of which is connected to the valve stem 21; an opening assembly 4, which includes an opening element 41, and the opening element 41 is connected to the other end of the first elastic element 3. When an external force is applied to the opening element 41, the movement of the opening element causes the first elastic element 3 to undergo elastic deformation, so as to apply an elastic force to the valve stem 21 for accelerating the opening of the valve stem.

[0045] Figure 4 The state of the valve stem in the valve mechanism of the utility model in the closed state is shown from a cross-sectional perspective.

[0046] When the suction device is in working state, that is, when the motor of the suction device is started, negative pressure will be established in the dust collecting chamber 105, and then the suctioned objects will be sucked into the dust collecting chamber 105 of the suction device along with the airflow. Figure 4 As shown, when the filter 106 is not cleaned and purged, the valve stem 21 is in a closed state, that is, the external environment is not connected to the cavity of the housing 1. At this time, the cavity 11 is at a negative pressure P2, and the external environment is substantially at atmospheric pressure P1. Therefore, the pressure difference F1 between the external environment and the cavity 11 exerts a force on the valve stem 21 to keep it in a closed state. At the same time, the flow direction of the airflow is as shown by the arrow in the figure, from the dust collecting cavity 105 through the filter 106 into the cavity 11, and then into the motor cavity 104. In this process, the dust sucked in by the suction device will gather on the dust collecting side of the filter 106 (i.e. Figure 4 on the underside of the filter).

[0047] Figure 5 The state of the opening element in the valve mechanism of the utility model under the state of being subjected to external force is shown from a cross-sectional perspective.

[0048] like Figure 5As shown, when the valve mechanism needs to be opened, an external force Fp is applied to the opening element 41, and the opening element 41 moves. This movement causes the first elastic element 3 ( Figure 5 The first elastic element (not visible) undergoes elastic deformation, thereby causing the first elastic element to generate an elastic force Fs.

[0049] Figure 6 The state of the valve stem in the valve mechanism of the utility model in the open position is shown from a cross-sectional perspective.

[0050] like Figure 5 and Figure 6 As shown, as the opening element 41 gradually moves, the elastic deformation of the first elastic element 3 becomes larger and larger, so that the elastic force Fs becomes larger and larger. When the elastic force Fs is greater than the force F1 that keeps the valve stem 21 in the closed state, the valve mechanism opens, that is, the valve stem 21 switches from the closed state to the open state. In this state, the cavity 11 is connected to the external environment through the opening 14 fluid, so that the fluid flow enters the cavity 11 from the external environment as shown by the arrow, and flows from the cavity 11 to the filter 106, thereby cleaning and purging the filter 106. In the process of opening the valve mechanism, the pressure difference F1 decreases rapidly, and at the same time, the first elastic element 3 with elastic deformation ( Figure 6 The elastic force accumulated in the valve stem accelerates the opening of the valve stem, thereby allowing the valve mechanism to open at a faster speed.

[0051] During the use of the suction device, the air performance of the suction device may sometimes decrease due to filter clogging as the use time increases, and there may be problems such as insufficient vacuum or negative pressure in the suction device, which may also affect the cleaning effect of the filter.

[0052] In order to solve this problem, the utility model further provides a valve mechanism in another embodiment.

[0053] like Figure 7 As shown, in one embodiment, the valve mechanism may include:

[0054] The housing 1 has a cavity 11 therein, the cavity 11 is used to communicate with the motor cavity fluid of the suction device through a first port 12, and is used to communicate with the filter fluid of the suction device through a second port 13; the valve stem assembly includes a valve stem 21 which is openably arranged on the housing 1, wherein when the valve stem 21 is in an open state, the cavity 11 is in fluid communication with the external environment, so that the fluid can flow from the cavity to the filter, so as to clean the filter 106; a first elastic element 3, one end of which is connected to the valve stem 21; an opening assembly 4 includes an opening Element 41 and locking piece 42, the opening element 41 is connected to the other end of the first elastic element 3, the locking piece 42 is connected to the opening element 41, the locking piece 42 has a locking position and an unlocking position, wherein in the locking position, the locking piece 42 abuts against the valve stem 21 to prevent the valve stem from opening; when an external force is applied to the opening element 41, the movement of the opening element 41 drives the locking piece 42 to switch to the unlocking position where it is disengaged from the abutment against the valve stem 21, and also causes the first elastic element 3 to undergo elastic deformation to apply an elastic force to the valve stem 21 for accelerating the opening of the valve stem.

[0055] Figure 8 The state of the valve rod of the valve mechanism described in the utility model in a closed state in another embodiment is shown in a cross-sectional view.

[0056] When the suction device is in working state, the motor of the suction device is started, and a negative pressure P2 is established in the dust collecting chamber 105, and the suctioned object is sucked into the dust collecting chamber 105 of the suction device along with the airflow. Figure 8 As shown, in this embodiment, when the filter 106 is not cleaned and purged, the valve stem 21 is in a closed state, that is, the external environment is not connected to the cavity of the shell 1. At this time, there is a negative pressure P2 in the cavity 11, and the external environment is basically the atmospheric pressure P1. Therefore, the pressure difference F1 between the external environment and the cavity 11 will exert a force on the valve stem 21 to make it tend to the closed state. Not only that, the locking member 42 in the locking position also abuts against the valve stem 21 to apply a force F2 to it to prevent the valve stem from opening. Therefore, even if the vacuum degree in the cavity 11 is insufficient and the pressure difference F1 between the external environment and the cavity 11 becomes smaller, the locking member 42 in the locking position can keep the valve stem in the closed position. In the closed state of the valve stem, the flow direction of the airflow is shown by the arrow in the figure, from the dust collecting cavity 105 through the filter 106 into the cavity 11, and then into the motor cavity 104. In this process, the dust sucked in by the suction device will gather on the dust collecting side of the filter 106 (that is, Figure 8 on the underside of the filter).

[0057] Fig. 9 The state of the opening element of the valve mechanism described in the utility model under the state of being subjected to external force in another embodiment is shown from a cross-sectional perspective.

[0058] like Fig. 9 As shown, when the valve mechanism needs to be opened, an external force Fp is applied to the opening element 41, and the opening element 41 moves. This movement causes the first elastic element 3 ( Fig. 9 The first elastic element 41 is elastically deformed, so that the first elastic element generates an elastic force Fs. At the same time, the movement of the opening element 41 also drives the locking element 42 to move, thereby switching from the locking element 42 to the unlocking position where it is disengaged from the valve stem 21.

[0059] Fig.10 The state of the valve stem of the valve mechanism described in the utility model in another embodiment in the open position is shown in a cross-sectional view.

[0060] like Fig. 9 and Fig.10 As shown, with the movement of the opening element 41, the locking member 42 switches from the locking position to the unlocking position where it is disengaged from the valve stem 21, and the force F2 disappears, so that the force that keeps the valve stem in the closed state becomes smaller. At the same time, with the gradual movement of the opening element 41, the elastic deformation of the first elastic element 3 becomes larger and larger, so that the elastic force Fs becomes larger and larger. When the elastic force Fs is greater than the force that keeps the valve stem 21 in the closed state, the valve mechanism opens, that is, the valve stem 21 switches from the closed state to the open state. In this state, the cavity 11 is fluidically connected to the external environment through the opening 14, so that the fluid airflow enters the cavity 11 from the external environment as shown by the arrow, and flows from the cavity 11 to the filter 106, thereby cleaning and purging the filter 106. In the process of opening the valve mechanism, the pressure difference F1 decreases rapidly, and at the same time, the first elastic element 3 with elastic deformation ( Fig. 9 and 10 The elastic force accumulated in the valve stem accelerates the opening of the valve stem, thereby allowing the valve mechanism to open at a faster speed.

[0061] It can be seen that in this embodiment, due to the setting of the locking member, regardless of the vacuum degree in the suction device, the valve mechanism can be stably maintained in a closed state in a non-clean state, and can be quickly opened when the filter needs to be cleaned.

[0062] like Fig. 9 and Fig.10 As shown, in some more specific embodiments, the locking member 42 may include a lever, the head end of the lever is associated with the valve stem 21, the tail end of the lever is associated with the opening element 41, the lever is rotatably arranged through the rotating shaft 43, and the rotation of the lever around the rotating shaft 43 can switch it between the locking position and the unlocking position.

[0063] In some specific examples, the rotating shaft can be directly fixed on the housing 1. Of course, in other specific examples, the rotating shaft can also be set on other fixed components.

[0064] like Fig. 9 and Fig.10 As shown, in some more specific embodiments, a groove 411 is provided on the opening element 41, so that the tail end of the lever can be correspondingly arranged in the groove 411. In this way, as the opening element 41 moves, the wall 4111 of the groove 411 will press the tail end of the lever to make the lever rotate around the rotating shaft 43.

[0065] For the above-mentioned embodiments, Figure 3 and Figure 7 As shown, in some more specific embodiments of the present invention, the first elastic element 3 may include a force storage spring, wherein when an external force is applied to the opening element 41, the movement of the opening element 41 will stretch the force storage spring, thereby causing the force storage spring to elastically deform to apply an elastic force to the valve stem 21 for accelerating the opening of the valve stem.

[0066] Of course, in some other optional embodiments, first elastic elements of other forms or structures may also be used, such as elastic belts or similar elastic elements.

[0067] In some more specific embodiments, Figure 2 As shown, the force storage springs can be arranged in pairs in consideration of force balance.

[0068] In addition, for the above-mentioned embodiments, Figure 3 and Figure 7 As shown, in some more specific embodiments of the present invention, the opening component 4 may further include a second elastic element 5, which is configured to apply a reset force to the opening element 41, that is, when the external force Fp is removed, the opening element 41 can be reset under the elastic force of the second elastic element.

[0069] In some more specific examples, the second elastic element 5 may be a coil spring. In some other more specific examples, the second elastic element may also be a leaf spring or other similar elastic elements.

[0070] In addition, for the above embodiments, the direction in which the opening element 41 is subjected to the external force is not in the same direction as the elastic deformation direction of the first elastic element 3. Figure 3 and Figure 7 As shown, the opening element 41 is subjected to the downward external force Fp, so that the first elastic element 3 is elastically deformed in a substantially horizontal direction, such as being stretched. Since the valve mechanism is arranged inside the suction device, its arrangement space is limited, and the above arrangement mode can save the arrangement space of the valve mechanism.

[0071] Of course, in some implementations with slightly inferior implementation effects to the above-mentioned implementations, the moving direction of the opening element and the stretching direction of the first elastic element may also be set in the same direction, which will require a larger valve structure setting space.

[0072] In some more specific embodiments, Figure 3 and Figure 7 As shown, the opening element 41 is set as a key, so that when an external force Fp is applied, the key is pressed down. The lower end of the key has a wedge-shaped surface, and the opening assembly also includes a wedge block 44 that fits against the wedge surface, and the second elastic element 5 is connected to the wedge block 44. In this way, when the key is pressed down, it will move linearly in a direction substantially perpendicular to the pressing direction under the action of the wedge surface, thereby stretching the first elastic element 3 and compressing the second elastic element 5. When the external force is removed, the second elastic element 5 resets the key.

[0073] In addition, for the above embodiments, in some more specific embodiments, such as Figure 3 As shown, the opening component 4 may further include a guide element 45, such as a guide groove. The guide element 45 may be directly disposed on the housing 1 or on other fixed elements. The guide element 45 may provide a guide for the movement of the opening element.

[0074] In addition, for the above-mentioned embodiments, in some embodiments of the present invention, the opening element 41 can be directly connected to the valve stem 21 through the first elastic element 3, and the opening force is transmitted to the valve stem 21 through the first elastic element. This setting method has a simple structure.

[0075] In some other embodiments, in order to make the solution of the utility model directly compatible with the existing valve stem without modifying the existing valve stem, in some other embodiments of the utility model, the valve stem assembly can also include a connecting rod 22 slidably connected to the valve stem 21, the opening element 41 is connected to the connecting rod 22, one end of the first elastic element 3 is connected to the valve stem 21, and the other end is connected to the connecting rod 22. When the opening element moves, it will first drive the connecting rod 22 to move a certain stroke relative to the valve stem 21, and stretch the first elastic element in the process, and then as the opening element moves further, the valve stem is opened.

[0076] It should be noted that the opening element can be directly operated manually, or it can be connected with other control elements, such as magnetic control, electric control, and hydraulic control elements, to achieve automatic control.

[0077] By setting a control element, the valve can be further opened intermittently at set time intervals as required, or the opening of the valve can be controlled according to the dust accumulation degree information of the filter transmitted by the sensor on the filter.

[0078] It should also be noted that the present invention does not limit the number of components to be set. As long as the technical solution can be implemented, technicians in this field can set it as needed.

[0079] In another embodiment, the utility model further provides a suction device 100, which includes a shell 101, in which a dust collecting chamber 105, a motor chamber 104 provided with a suction motor, and a filter 106 are provided, wherein the dust collecting chamber is located on a dust collecting side 1061 of the filter 106, and a valve mechanism as described above is provided in the accommodating space on a cleaning side 1062 opposite to the dust collecting side 1061 of the filter 106.

[0080] Since the arrangement and working state of the valve mechanism in the suction device 100 have been described in detail above, they will not be repeated here.

[0081] The valve mechanism described in the utility model adopts the above structure, so that the valve can be opened more quickly. When the filter needs to be cleaned, the valve can be quickly switched from the closed position to the open position. In some examples, the opening time is as short as 11 seconds.

[0082] Moreover, in some embodiments of the present invention, by providing a locking member, it can be ensured that the present technical solution can be implemented regardless of the vacuum degree (ie, negative pressure) in the suction device.

[0083] Accordingly, the suction device described in the utility model can greatly improve working efficiency due to the adoption of the above-mentioned valve mechanism.

[0084] 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.

[0085] 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.

[0086] 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 cleaning a filter of a suction device, characterized in that: include: A housing (1) having a cavity (11) 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 housing, wherein in an open state of the valve stem, the cavity is in fluid communication with an external environment, and the fluid flows from the cavity to the filter to clean the filter; A first elastic element (3), one end of which is connected to the valve stem; An opening assembly (4) comprises an opening element (41) connected to the other end of a first elastic element; when an external force is applied to the opening element, movement of the opening element causes the first elastic element to undergo elastic deformation, thereby applying an elastic force to the valve stem for accelerating the opening of the valve stem.

2. The valve mechanism according to claim 1, characterized in that: The first elastic element (3) comprises a force storage spring, wherein when an external force is applied to the opening element, the movement of the opening element stretches the force storage spring to apply an elastic force to the valve stem for accelerating the opening of the valve stem.

3. The valve mechanism according to claim 1, characterized in that: The opening assembly further comprises a second elastic element (5) which is arranged to apply a restoring force to the opening element.

4. The valve mechanism according to claim 1, characterized in that: The direction in which the opening element is subjected to external force is different from the direction in which the first elastic element is elastically deformed.

5. The valve mechanism according to claim 4, characterized in that: The opening element is configured as a button, the lower end of which has a wedge-shaped surface; the opening component further comprises a wedge-shaped block (44) adapted to abut against the wedge-shaped surface.

6. The valve mechanism according to claim 1, characterized in that: The opening assembly further comprises a guide element (45), which provides a guiding function for the movement of the opening element.

7. The valve mechanism according to claim 1, characterized in that: The opening element is connected to a control element, and the control element applies the external force to the opening element to control the movement of the opening element.

8. The valve mechanism according to claim 1, wherein: The valve stem assembly also includes a connecting rod (22) slidably connected to the valve stem, the opening element is connected to the connecting rod, and the opening element is connected to the other end of the first elastic element through the connecting rod.

9. The valve mechanism according to any one of claims 1 to 8, characterized in that: The opening assembly also includes: a locking piece (42) connected to the opening element, the locking piece having a locking position and an unlocking position, wherein in the locking position, the locking piece abuts against the valve stem to prevent the valve stem from opening; when an external force is applied to the opening element, the movement of the opening element drives the locking piece to switch to the unlocking position where it is disengaged from the abutment against the valve stem.

10. The valve mechanism according to claim 9, characterized in that The locking member comprises a lever, which is rotatably arranged via a rotating shaft (43) to switch between a locking position and an unlocking position, wherein the head end of the lever is associated with the valve stem, and the tail end of the lever is associated with the opening element.

11. The valve mechanism according to claim 10, characterized in that The opening element is provided with a groove (411), and the tail end of the lever is arranged in the groove. As the opening element moves, the wall (4111) of the groove presses the tail end of the lever to make the lever rotate around the rotating shaft.

12. 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 as described in any one of claims 1 to 11 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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