A vacuum cleaner

Abstract

A vacuum cleaner includes a dust collecting container, a motor providing suction power, an external air inlet, a closing valve closing the external air inlet when in a closed position, a filter device for filtering dirty air, a valve stem that can move the closing valve from the closed position and drive the closing valve to rush toward the filter device, and the closing valve can impact the filter device under the drive of the valve stem. With such a design, the valve stem drives the closing valve to rush toward the filter device to cause a mechanical impact on the filter device, which can generate a relatively strong vibration on the filter device, effectively shaking off the dust accumulated in the filter device, and achieving cleaning of the filter device.

Description

[Technical field]

[0001] The invention relates to a vacuum cleaner. [Background technology]

[0002] A vacuum cleaner is a commonly used cleaning device that has the function of separating dust, debris and other garbage from the air. After a period of use, the filtering device accumulates dust, so the filtering performance decreases and the filtering device needs to be cleaned. The existing methods of cleaning the filtering device include reverse airflow cleaning filter, shaking filter cleaning filter, rubbing filter paper surface cleaning filter, etc. The present invention provides another improved vacuum cleaner with a filter cleaning mechanism. [Summary of the invention]

[0003] The invention provides a dust collector capable of cleaning a filter by mechanical impact.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a vacuum cleaner, comprising a dust collecting container, a motor for providing suction power, an external air inlet, a closing valve for closing the external air inlet when in a closed position, a filtering device for filtering dirty air, a valve stem that can move the closing valve from the closed position and drive the closing valve to rush toward the filtering device, and the closing valve can impact the filtering device when driven by the valve stem.

[0005] With such a design, the valve stem drives the closing valve to rush toward the filter device to cause a mechanical impact on the filter device, which can produce a relatively strong vibration on the filter device, effectively shaking off the dust accumulated in the filter device, thereby cleaning the filter device.

[0006] Furthermore, the vacuum cleaner also includes a second elastic member between the closing valve and the filtering device, the second elastic member is a spring, the second elastic member and the valve stem are located on opposite sides of the closing valve, when the valve stem moves to an end position of a stroke, the second elastic member is in a compressed state and the compressed second elastic member blocks the closing valve and the impact of the closing valve on the filtering device is transmitted to the filtering device through the compressed second elastic member.

[0007] Furthermore, the closing valve is maintained in the closing position by the elastic force of the second elastic member, the valve stem can overcome the elastic force of the second elastic member to move the closing valve from the closing position, and the second elastic member is always in a compressed state between the closing valve and the filter device.

[0008] Furthermore, the filtering device includes a tray and a filter mounted on the tray. The tray is provided with an air vent. The air filtered by the filter flows through the air vent. One end of the second elastic member presses against the tray and the other end presses against the closing valve. When the valve stem moves to the end position of the stroke, the closing valve impacts the tray through the pressed second elastic member. The closing valve generates a relatively strong vibration on the tray, which can effectively shake off the dust accumulated on the filter mounted on the tray, thereby cleaning the filter.

[0009] Furthermore, the tray is provided with a biasing portion biased to one side of the tray, the second elastic member is located between the closing valve and the biasing portion, one end of the second elastic member is pressed against the biasing portion, and when the valve stem moves to the end position of the stroke, the closing valve impacts the biasing portion by means of the compressed second elastic member.

[0010] Furthermore, the tray is also provided with a main body, the offset portion is offset to one side of the main body and is formed integrally with the main body, the air outlet is opened in the main body, the motor is located on the upper side of the tray and the filter is located on the lower side of the tray, and the filter is cylindrical.

[0011] Furthermore, the offset portion is provided with a circular ring rib and a plurality of supporting ribs distributed in a radial shape, one end of the second elastic member is pressed against the supporting rib, and the circular ring rib surrounds the supporting rib.

[0012] Furthermore, the tray is provided with at least one ventilation opening spaced apart from the air exhaust port, and when cleaning the filter, air can sequentially pass through the opened external air inlet and the ventilation opening and be applied to the surface of the filter facing away from the dust collection container.

[0013] Furthermore, the vacuum cleaner also includes a first chamber, the second elastic member is located in the first chamber, the external air inlet constitutes the air inlet of the first chamber, the vent constitutes the air outlet of the first chamber, and the offset portion is spaced between the first chamber and the internal space of the dust collecting container.

[0014] Furthermore, the offset portion is provided with a bottom wall and a first frame surrounding the second elastic member, and the vacuum cleaner also includes a top wall opposite to the bottom wall and a second frame surrounding the second elastic member, the first frame and the second frame are respectively located between the bottom wall and the top wall, the external air inlet is located on the top wall, and the vent is opened on the bottom wall, and the bottom wall, the first frame, the top wall, and the second frame form the first chamber.

[0015] Furthermore, the tray is provided with a third frame surrounding the first frame, and a matching groove surrounding the second elastic member is formed between the first frame and the third frame, and the second frame is assembled into the matching groove.

[0016] Furthermore, the vacuum cleaner also includes an electromagnetic coil module for driving the valve stem, the electromagnetic coil module is provided with a through channel penetrating the electromagnetic coil module, and the valve stem is at least partially penetrated through the through channel.

[0017] Furthermore, the valve stem has an initial position, a stroke end position, and a valve opening position between the initial position and the stroke end position. The valve stem is separated from the closed valve at the initial position, and can contact the closed valve in the closed position when the valve stem moves to the valve opening position.

[0018] Furthermore, the valve stem includes a first end that is always located outside the electromagnetic coil module and a second end opposite to the first end, the first end and the closing valve are located on opposite sides of the electromagnetic coil module, the first end of the valve stem and the closing valve are located on opposite sides of the electromagnetic coil module, and relative to the valve stem in the valve opening position and the stroke end position, the first end of the valve stem is farther away from the electromagnetic coil module when it is in the initial position. Such a design can improve the effect of the electromagnetic coil module on the valve stem to generate electromagnetic driving force, and enhance the impact force of the valve stem.

[0019] Furthermore, the vacuum cleaner further comprises a first elastic member for maintaining the valve stem in an initial position, the first elastic member being sleeved on the valve stem, the first elastic member being located between the electromagnetic coil module and the first end of the valve stem, and one end of the first elastic member being pressed against the electromagnetic coil module. With such a design, the position of the valve stem relative to the electromagnetic coil module is effectively limited by the first elastic member having one end pressed against the electromagnetic coil module.

[0020] Furthermore, the valve stem is provided with a flange outside the electromagnetic coil module, the first elastic member is pressed between the electromagnetic coil module and the flange, and the first elastic member is a spring with radial dimensions gradually decreasing from the middle to both ends. Such a design can reduce the compression height of the first elastic member.

[0021] Furthermore, when the valve stem is in the initial position, the second end is located in the through channel of the electromagnetic coil module, and when the valve stem is in the end position of the stroke, the second end is located outside the electromagnetic coil module and the first end and the second end are located on opposite sides of the electromagnetic coil module.

[0022] Furthermore, the valve stem is provided with a magnetizable section that can be magnetized by the electromagnetic coil module and a non-magnetizable section that cannot be magnetized by the electromagnetic coil module. The magnetizable section and the non-magnetizable section are fixed together. The magnetizable section is located between the non-magnetizable section and the closed valve. The magnetizable section has a head end and a tail end opposite to each other in the direction of movement of the valve stem, and the tail end is located between the non-magnetizable section and the head end. When the valve stem is in the initial position, the non-magnetizable section is at least partially located inside the electromagnetic coil module. When the valve stem is in the end position of the stroke, the non-magnetizable section is at least partially located outside the electromagnetic coil module. Such a design is conducive to the electromagnetic coil module to drive the valve stem more effectively. The non-magnetizable section is arranged to enhance the impact on the closed valve. If the non-magnetizable section is replaced with a magnetizable section, the valve stem as a whole is closer to the equilibrium position relative to the electromagnetic coil module, which will reduce the total driving energy of the electromagnetic coil module on the valve stem during the valve stem stroke, resulting in a reduction in the impact force of the valve stem.

[0023] Furthermore, the center position between the opposite ends of the magnetizable segment in the direction of the valve stem movement is always located between the center position between the opposite ends of the electromagnetic coil module through-channel in the direction of the valve stem movement and the closed valve, or, when the valve stem is at the end position of the stroke, the center position between the opposite ends of the magnetizable segment in the direction of the valve stem movement overlaps with the center position between the opposite ends of the electromagnetic coil module through-channel in the direction of the valve stem movement. With such a design, it is basically ensured that the magnetizable segment never crosses the equilibrium position relative to the electromagnetic coil module, so that the electromagnetic driving force generated by the energized electromagnetic coil module on the magnetizable segment during the movement of the magnetizable segment to the end position of the stroke is in the direction of movement.

[0024] Furthermore, the head end of the magnetizable section and the closing valve are located on opposite sides of the electromagnetic coil module, the head end of the magnetizable section is always located outside the electromagnetic coil module, when the valve stem is at the end of the stroke, the tail end is located outside the electromagnetic coil module and is located on opposite sides of the electromagnetic coil module with the head end, when the valve stem is at the end of the stroke, the distance that the tail end exceeds the electromagnetic coil module in the direction of the valve stem movement is less than the distance that the head end exceeds the electromagnetic coil module. Such a design can basically ensure that the electromagnetic driving force on the magnetizable section is consistent with its movement direction during the process of the valve stem moving from the initial position to the end of the stroke, thereby ensuring that the valve stem can have a greater impact capacity.

[0025] Furthermore, when the valve stem is in the initial position, the tail end of the magnetizable section is located within the electromagnetic coil module.

[0026] Furthermore, when the valve stem is in the initial position, the non-magnetizable section is completely located within the electromagnetic coil module.

[0027] Furthermore, when the valve stem moves to the valve opening position, the non-magnetizable section can contact the closing valve in the closing position, and the valve stem pushes the closing valve through the non-magnetizable section.

[0028] Furthermore, the magnetizable section is provided with a mounting hole extending from the tail end into the magnetizable section, the non-magnetizable section is fixed to the mounting hole, the mounting hole is provided with an internal thread, and the non-magnetizable section is provided with an external thread screwed to the internal thread.

[0029] Furthermore, the magnetizable section and the non-magnetizable section are respectively in the form of columns, the magnetizable section is an iron column or a steel column or a column containing more than half of iron, and the non-magnetizable section is a copper column or an aluminum column or a copper-aluminum alloy column or a plastic column.

[0030] Furthermore, the vacuum cleaner also includes a first elastic member for maintaining the valve stem in an initial position, a first cover body covering the valve stem and the first elastic member, the first elastic member is sleeved on the valve stem, the first cover body is provided with a sleeve portion surrounding the valve stem and the first elastic member, and a plurality of mounting feet, and a first air inlet is formed between adjacent mounting feet and is fluidly connected to an external air inlet.

[0031] Furthermore, the vacuum cleaner also includes a second cover body covering the first cover body, and the second cover body is provided with a second air inlet fluidly connected to the first air inlet.

[0032] Furthermore, the vacuum cleaner also includes a head shell, a first cover body, a second cover body, and an electromagnetic coil module are located inside the head shell, and the head shell is provided with a handle for moving the vacuum cleaner and a ventilation window, and air can flow to the external air inlet through the ventilation window, the second air inlet, and the first air inlet in sequence.

[0033] Furthermore, the valve stem includes a first end and a second end opposite to each other, the second end is located between the first end and the closing valve, the closing valve is located between the valve stem and the filter device, and the valve stem pushes the closing valve toward the filter device through the second end.

[0034] Furthermore, the vacuum cleaner also includes an electromagnetic coil module for driving the valve stem, and the filtering device also includes a tray and a filter installed on the tray. The valve stem can move from an initial position to an end position of a stroke under the drive of the electromagnetic coil module. When the valve stem moves to the end position of the stroke, the closing valve contacts the tray and causes an impact on the tray.

[0035] Furthermore, the tray is provided with a biasing portion biased to one side of the tray, and when the valve stem moves to the end position of the stroke, the closing valve contacts the biasing portion and causes an impact on the biasing portion.

[0036] Furthermore, the closing valve is provided with a protrusion protruding in a direction away from the valve stem, and when the valve stem moves to the end position of the stroke, the protrusion contacts the tray and causes an impact on the tray.

[0037] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0038] Figure 1 is a three-dimensional diagram of the vacuum cleaner of the present invention;

[0039] Figure 2 This is a three-dimensional diagram of the vacuum cleaner of the present invention with the head shell removed;

[0040] Figure 3 This is a three-dimensional diagram of the vacuum cleaner of the present invention after removing the head shell and the second cover;

[0041] Figure 4 It is a longitudinal cross-sectional view of the vacuum cleaner of the present invention (the valve stem is in the initial position);

[0042] Figure 5 for Figure 4 A partial enlarged view of

[0043] Figure 6 It is a three-dimensional diagram of the bottom cover, the second elastic member and the closing valve of the vacuum cleaner of the present invention combined together;

[0044] Figure 7 A three-dimensional diagram of the bottom cover and the tray of the vacuum cleaner of the present invention assembled together;

[0045] Figure 8 A three-dimensional diagram of the bottom cover, tray and filter of the vacuum cleaner of the present invention assembled together;

[0046] Fig. 9 is a three-dimensional diagram of the vacuum cleaner tray of the present invention;

[0047] Fig.10 It is an exploded view of the first elastic member, valve stem, electromagnetic coil module, valve seat, closing valve and second elastic member of the vacuum cleaner of the present invention. [Specific implementation method]

[0048] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0049] Reference Figures 1 to 10 As shown, the vacuum cleaner has a dust collecting container 10, a filtering device, a float 11, a caster 12 arranged at the bottom of the dust collecting container 10, a motor 13 for providing suction power, an impeller (not shown) driven to rotate by the motor 13, an external air inlet 14, a closing valve 15, a valve stem 2, an electromagnetic coil module 3 for driving the valve stem 2, a first elastic member 16 for keeping the valve stem 2 in an initial position, and a second elastic member 17. The rated power of the motor 13 is between 100w and 3000w, preferably between 200w and 1800w, for example 960w, 1200w, 1320w, 1440w; the capacity of the vacuum cleaner or the capacity of the dust collection container 10 is between 0.5 gallons (1 gallon = 3.785412 liters) and 30 gallons, preferably between 1 gallon and 20 gallons, for example 6 gallons, 9 gallons, 10 gallons, 12 gallons, 14 gallons, 16 gallons.

[0050] The closing valve 15 can be moved under the drive of the valve stem 2. The closing valve 15 has a closing position, a stroke end position, and an open valve position between the initial position and the stroke end position. The valve stem 2 can move from the initial position to the stroke end position. Specifically, the closing valve 15 can be moved from the closing position to the stroke end position under the drive of the valve stem 2. When the closing valve 15 is in the closing position, the external air inlet 14 is closed. The valve stem 2 can move the closing valve 15 from the closing position to open the external air inlet 14. The electromagnetic coil module 3 is provided with a through channel that penetrates the electromagnetic coil module 3. 30, the electromagnetic coil module 3 is cylindrical, and further, the electromagnetic coil module 3 is cylindrical; the valve stem 2 is at least partially penetrated in the through channel 30, and the valve stem 2 is provided with a magnetizable section 20 that can be magnetized by the electromagnetic coil module 3 and a non-magnetizable section 21 that cannot be magnetized by the electromagnetic coil module 3, the magnetizable section 20 and the non-magnetizable section 21 are fixed together, the magnetizable section 20 has opposite head ends 200 and tail ends 201, the head ends 200 and the tail ends 201 are opposite in the movement direction of the valve stem 2, and the tail end 201 is located between the non-magnetizable section 21 and the head end 200. Based on common sense of physics, the electromagnetic coil module 3 after being energized can magnetize the magnetizable segment 20 and generate an electromagnetic driving force on the magnetizable segment 20, but does not generate an electromagnetic driving force on the non-magnetizable segment 21. Since the electromagnetic coil module 3 does not apply an electromagnetic driving force to the non-magnetizable segment 21, setting the non-magnetizable segment 21 with different lengths and shapes does not substantially change the magnitude of the electromagnetic driving force. Changes in the length and shape of the non-magnetizable segment 21 have little effect on the electromagnetic driving force. Therefore, the non-magnetizable segment 21 is highly adjustable, while changes in the magnetizable segment 20 have a great impact and are therefore not easy to change at will. Compared with the magnetizable segment 20, The non-magnetizable section 21 has better adjustment adaptability. The valve stem 2 of this design is configured with the non-magnetizable section 21, which is convenient to start with the non-magnetizable section 21. Based on the good adjustment adaptability of the non-magnetizable section 21, the non-magnetizable section 21 is adjusted (the length ratio and / or mass ratio between the magnetizable section 20 and the non-magnetizable section 21 is adjusted, or the length, shape, etc. of the non-magnetizable section 21 is adjusted) to develop and manufacture a valve stem 2 that meets the needs (such as the size of the electromagnetic driving force and energy, and the relative position limit with the closing valve 15), which is conducive to the diversification of the methods of developing the valve stem 2 that meets the needs and the improvement of the development convenience.

[0051] In this embodiment, the valve stem 2 moves downward from the initial position to the end position of the stroke under the drive of the electromagnetic coil module 3, and the valve stem 2 passes through the valve opening position during the movement; when the electromagnetic coil module 3 is not powered on, the valve stem 2 remains in the initial position; when the valve stem 2 is in the initial position, the closing valve 15 is in the closing position, and when the valve stem 2 is in the end position of the stroke, the closing valve 15 is in a state of being moved away from the closing position. During the movement of the valve stem 2 from the initial position to the end position of the stroke, the magnetizable section 20 and the closing valve 15 are not in contact, and the valve stem 2 moves the closing valve 15 away from the non-magnetizable section 21. The valve stem 2 moves the closing valve 15 away from the closing position through the opposite ends of the non-magnetizable section 21 that is away from the magnetizable section 20. Further, the valve stem 2 pushes the closing valve 15 through one end of the opposite ends of the non-magnetizable section 21 that is away from the magnetizable section 20. In this embodiment, the valve stem 2 pushes the closing valve 15 through the lower end of the non-magnetizable section 21. When the valve stem 2 is in the initial position, the non-magnetizable section 21 is at least partially located inside the electromagnetic coil module 3. When the valve stem 2 is in the stroke end position, the non-magnetizable section 21 is at least partially located outside the electromagnetic coil module 3. Such a position layout is conducive to the electromagnetic coil module 3 to drive the valve stem 2 more effectively. When the valve stem 2 is in the initial position, the non-magnetizable section 21 is completely located inside the electromagnetic coil module 3. Such a design is conducive to the valve stem 2 obtaining more driving energy from the electromagnetic coil module 3 during the movement to the stroke end position. The valve stem 2 impacts the closed valve 15 and moves the closed valve 15 from the closed position during the movement from the initial position to the stroke end position. The non-magnetizable section 21 is the part where the valve stem 2 impacts the closed valve 15.

[0052] The non-magnetizable section 21 is located between the magnetizable section 20 and the closing valve 15. The center position between the opposite ends of the magnetizable section 20 in the moving direction of the valve stem 2 is always located between the center position between the opposite ends of the through channel 30 of the electromagnetic coil module 3 in the moving direction of the valve stem 2 and the closing valve 15. Alternatively, when the valve stem 2 is at the end position of the stroke, the center position between the opposite ends of the magnetizable section 20 in the moving direction of the valve stem 2 overlaps with the center position between the opposite ends of the through channel 30 of the electromagnetic coil module 3 in the moving direction of the valve stem 2. Such a design basically ensures that the magnetizable section 20 never crosses the equilibrium position relative to the electromagnetic coil module 3, and the electromagnetic driving force generated by the energized electromagnetic coil module 3 on the magnetizable section 20 during the movement of the magnetizable section 20 to the end position of the stroke is in the direction of the movement of the valve stem 2. This can basically ensure that the electromagnetic driving force received by the magnetizable section 20 during the process of the valve stem 2 moving from the initial position to the end position of the stroke is consistent with its moving direction. The head end 200 of the magnetizable section 20 is always located outside the electromagnetic coil module 3, and the head end 200 and the closing valve 15 are located on opposite sides of the electromagnetic coil module 3. When the valve stem 2 is at any position between the initial position and the stroke end position, the magnetizable section 20 is at least partially located in the through passage 30.

[0053] When the valve stem 2 is at the end of the stroke, the tail end 201 is located outside the electromagnetic coil module 3 and is located on the opposite sides of the electromagnetic coil module 3 from the head end 200. When the valve stem 2 is at the end of the stroke, the distance that the tail end 201 exceeds the electromagnetic coil module 3 in the direction of movement of the valve stem 2 is less than the distance that the head end 200 exceeds the electromagnetic coil module 3. Such a design can basically ensure that the electromagnetic driving force exerted on the magnetizable section 20 during the movement of the valve stem 2 to the end of the stroke is consistent with its movement direction, thereby ensuring that the valve stem 2 can have a greater impact capacity. When the valve stem 2 is at the initial position, the tail end 201 is located inside the electromagnetic coil module 3.

[0054] The magnetizable section 20 is provided with a mounting hole 202 extending from the tail end 201 into the magnetizable section 20, and the non-magnetizable section 21 is fixed to the mounting hole 202. The mounting hole 202 is provided with an internal thread, and the non-magnetizable section 21 is provided with an external thread screwed with the internal thread. The mounting hole 202 is vertical. The magnetizable section 20 and the non-magnetizable section 21 are respectively cylindrical, the magnetizable section 20 is an iron column or a steel column or a column containing more than half of iron, and the non-magnetizable section 21 is a copper column or an aluminum column or a copper-aluminum alloy column or a plastic column. The magnetizable section 20 is coaxial with the non-magnetizable section 21. The valve stem 2 pushes the closed valve 15 through the non-magnetizable section 21. The non-magnetizable section 21 is provided to enhance the impact on the closing valve 15. If the non-magnetizable section 21 is replaced with a magnetizable section, the valve stem 2 as a whole is closer to the equilibrium position relative to the electromagnetic coil module 3, which will reduce the total driving energy of the electromagnetic coil module 3 on the valve stem 2 during the stroke of the valve stem 2, resulting in a reduction in the impact force of the valve stem 2.

[0055] The electromagnetic coil module 3 drives the valve stem 2 by generating an electromagnetic driving force on the valve stem 2. The electromagnetic driving force is the force generated by the electromagnetic coil module 3 on the magnetized valve stem 2. The through channel 30 can guide the valve stem 2 to move. When the valve stem 2 is at any position between the initial position and the end position of the stroke, at least part of it is located in the through channel 30. The valve stem 2 is separated from the closing valve 15 at the initial position. When the valve stem 2 moves to the valve opening position, it can contact the closing valve 15 in the closing position. When the valve stem 2 is at the end position of the stroke, the closing valve 15 has been moved from the closing position to the closing position. The valve stem 2 moves away from its position. In the present solution, the valve stem 2 is separated from the closing valve 15 at the initial position. The valve stem 2 moves from the initial position first under the electromagnetic drive and the guidance of the through channel 30, instead of starting together with the closing valve 15. The moving valve stem 2 will have a greater impact on the closing valve 15, and based on the dual functions of the electromagnetic coil module 3 driving and guiding the movement of the valve stem 2, the valve stem 2 can guide the impact-type valve opening of the closing valve 15, thereby providing a vacuum cleaner with a valve stem 2 that can guide the impact-type valve opening of the closing valve 15.

[0056] The valve stem 2 includes an opposite first end 22 and a second end 23, the first end 22 and the second end 23 are opposite in the movement direction of the valve stem 2, the first end 22 is always located outside the electromagnetic coil module 3, the first end 22 of the valve stem 2 and the closing valve 15 are located on opposite sides of the electromagnetic coil module 3, the first elastic member 16 is sleeved on the magnetizable section 20, the first elastic member 16 is located between the electromagnetic coil module 3 and the first end 22 of the valve stem 2, one end of the first elastic member 16 is pressed against the electromagnetic coil module 3, such a design, the position of the magnetizable section 20 relative to the electromagnetic coil module 3 is effectively limited by the first elastic member 16 with one end pressed against the electromagnetic coil module 3. The valve stem 2 is provided with a flange 24 located outside the electromagnetic coil module 3, the first elastic member 16 is pressed between the electromagnetic coil module 3 and the flange 24, the first elastic member 16 is a spring with a radial dimension gradually reduced from the middle to both ends, such a design can reduce the compression height of the first elastic member 16, the first elastic member 16 is similar to a spindle shape, and the flange 24 is provided at the first end 22 of the valve stem 2. The electromagnetic coil module 3 is provided with an annular groove 31 and an annular convex ring 32 on one side facing the first end 22 of the valve stem 2. The annular groove 31 and the annular convex ring 32 surround the valve stem 2 respectively. One end of the first elastic member 16 is located in the annular groove 31 and sleeved on the annular convex ring 32. The valve stem 2 impacts the closing valve 15 through the non-magnetizable section 20 so that the closing valve 15 is moved away.

[0057] The magnetizable section 20 is equivalent to the magnetic core of the electromagnetic coil. According to the principles of electromagnetic induction in physics, when the centers of the magnetizable magnetic core and the electromagnetic coil roughly coincide, the magnetic core is in a balanced position relative to the electromagnetic coil. At this time, the electromagnetic coil has no electromagnetic induction force on the magnetic core (i.e., no attraction or repulsion on the magnetic core). Therefore, the magnetic core has a balanced position relative to the electromagnetic coil. At the balanced position, the electromagnetic coil has no electromagnetic driving force on the magnetic core. After the magnetic core exceeds the balanced position relative to the electromagnetic coil, the electromagnetic induction force will be reversed, thereby inhibiting the magnetic core from continuing to move away from the balanced position. The so-called magnetizable or non-magnetizable in the present invention cannot be absolutely considered to be magnetizable or non-magnetizable under any conditions, and should be understood according to common sense. For example, iron can be magnetized, but copper or aluminum cannot be magnetized. In this embodiment: the first end 22 of the valve stem 2 is the upper end of the valve stem 2, the second end 23 of the valve stem 2 is the lower end of the valve stem 2, the head end 200 of the magnetizable section 20 is the upper end of the magnetizable section 20, the tail end 201 of the magnetizable section 20 is the lower end of the magnetizable section 20, and the lower end of the non-magnetizable section 21 constitutes the second end 23 of the valve stem 2.

[0058] When the valve stem 2 is in the initial position, the second end 23 thereof is located in the through passage 30 of the electromagnetic coil module 3. When the valve stem 2 is in the stroke end position, the second end 23 thereof is located outside the electromagnetic coil module 3 and the first end 22 and the second end 23 are located on opposite sides of the electromagnetic coil module 3. The first end 22 of the valve stem 2 and the closing valve 15 are located on opposite sides of the electromagnetic coil module 3, and the second end 23 of the valve stem 2 is located between the first end 22 of the valve stem 2 and the tray 4. When the valve stem 2 is in the valve opening position, the second end 23 thereof is substantially flush with one end of the through passage 30 of the electromagnetic coil module 3. The through passage 30 is vertical.

[0059] The second elastic member 17 is used to keep the closing valve 15 in the closing position. The second elastic member 17 is always in a compressed state between the filter device and the closing valve 15. The valve stem 2 can overcome the elastic force of the second elastic member 17 to move the closing valve 15 from the closing position. The second elastic member 17 is a spring. When the valve stem 2 moves to the end position of the stroke, the second elastic member 17 is in a compressed state and the compressed second elastic member 17 blocks the closing valve 15 and the impact of the closing valve 15 on the filter device is transmitted to the filter device through the compressed second elastic member 17; when the closing valve 15 impacts the filter device, the closing valve 15 has no contact with the filter device. The compressed second elastic member 17 can block the movement of the closing valve 15 and the valve stem 2 to approach the filter device, but transmit the impact of the closing valve 15 and the valve stem 2 on the filter device to the filter device.

[0060] The filter device includes a tray 4 and a filter 50 mounted on the tray 4. One end of the second elastic member 17 presses against the tray 4, and the other end presses against the closing valve 15. When the valve stem 2 moves to the end position of the stroke, the closing valve 15 impacts the tray 4 by the pressed second elastic member 17. The tray 4 is provided with an air suction port 40, and the air filtered by the filter 50 flows through the air suction port 40; the tray 4 is provided with a biasing portion 41 and a main body 42 biased to one side of the tray 4, the second elastic member 17 is located between the closing valve 15 and the biasing portion 41, and one end of the second elastic member 17 presses against the biasing portion 41. The main body 42 is disc-shaped, the biasing portion 41 is biased to one side of the main body 42, the air suction port 40 is opened in the main body 42, and further, the air suction port 40 is opened in the central area of ​​the disc-shaped main body 42, and the biasing portion 41 is biased to one side of the main body 42. The filter device also includes a disc-shaped end cap 51, and the end cap 51 is connected to the lower end of the filter 50. The float 11 is received in the inner cavity 500 of the filter 50. The offset portion 41 and the main body 42 are integrally formed, the motor 13 is located on the upper side of the tray 4 and the filter 50 is located on the lower side of the tray 4, and the filter 50 is cylindrical.

[0061] The tray 4 is also provided with at least one vent 43 spaced from the air outlet 40, and the vent 43 is used for fluid communication between the inner cavity 500 of the filter 50 and the external air inlet 14. When cleaning the filter 50, air can enter the filter 50 through the opened external air inlet 14 and the vent 43 in sequence and be applied to the surface of the filter 50 facing away from the dust collection container 10. With such a design, compared with the prior art, by adding the vent 43 to the tray 4, the air from the external air inlet 14 can be introduced to the surface of the filter 50 facing away from the dust collection container 10 for cleaning the filter 50. This design increases the function of the tray 4 and enhances the practicality of the tray 4, thereby providing a vacuum cleaner with a tray 4 having a filter 50 and strong practicality. The offset portion 41 partially overlaps with the main body 42, and the vent 43 is opened in the overlapping area of ​​the offset portion 41 and the main body 42.

[0062] The vacuum cleaner further includes a bottom cover 55 covering the dust collecting container 10 and a wind cover 56 fixed to the bottom cover 55 .

[0063] The vent 43 is located between the air outlet 40 and the second elastic member 17. The vacuum cleaner further includes a first chamber 52, the second elastic member 17 is located inside the first chamber 52, the external air inlet 14 constitutes the air inlet of the first chamber 52, the vent 43 constitutes the air outlet of the first chamber 52, the offset portion 41 is spaced between the first chamber 52 and the internal space 101 of the dust collection container 10, and the filter 50 is accommodated in the internal space 101 of the dust collection container 10. The vent 43 is fluidically connected between the first chamber 52 and the inner cavity 500 of the filter 50. The biasing portion 41 is provided with a bottom wall 410 and a first frame 411 surrounding the second elastic member 17. The vacuum cleaner further comprises a top wall 53 opposite to the bottom wall 410 and a second frame 54 surrounding the second elastic member 17. The top wall 53 and the second frame 54 are respectively part of the bottom cover 55. The first frame 411 and the second frame 54 are respectively located between the bottom wall 410 and the top wall 53. The external air inlet 14 is located on the top wall 53. The vent 43 is opened on the bottom wall 410. The bottom wall 410, the first frame 411, the top wall 53 and the second frame 54 enclose the first chamber 52. The tray 4 is provided with a third frame 412 surrounding the first frame 411. The first frame 411 and the third frame 412 are spaced apart to form a matching groove 413 surrounding the second elastic member 17. The second frame 54 is assembled into the matching groove 413. The second frame 54 is assembled into the matching groove 413 to fit with the first frame 411 and the third frame 412 so as to seal the first chamber 52 on all sides. The first frame 411 , the second frame 414 , and the third frame 412 are respectively roughly rectangular, and a portion of the first frame 411 , a portion of the third frame 412 , and a portion of the matching groove 413 are respectively located between the ventilation port 43 and the exhaust port 40 .

[0064] The vacuum cleaner further includes a first cover 18 covering the valve stem 2 and the first elastic member 16, and a second cover 19 covering the first cover 18. The first elastic member 16 is sleeved on the valve stem 2. The first cover 18 is provided with a sleeve portion 180 surrounding the valve stem 2 and the first elastic member 16, and a plurality of mounting legs 181. A first air inlet 182 in fluid communication with the external air inlet 14 is formed between adjacent mounting legs 181. The second cover 19 is provided with a second air inlet (not shown) in fluid communication with the first air inlet 182. The vacuum cleaner further includes a head housing 44. The first cover 18, the second cover 19, and the electromagnetic coil module 3 are located within the head housing 44. The head housing 44 is provided with a handle 440 for moving the vacuum cleaner and a ventilation window 441. Air can flow to the external air inlet 14 through the ventilation window 441, the second air inlet, and the first air inlet 182 in sequence. The external air inlet 14 is provided with a valve seat 140, and the closing valve 15 is sealed and fitted to the valve seat 140 in the closed position. The valve seat 140 is made of a flexible material, such as rubber; the closing valve 15 is made of a hard material, such as plastic. The second air inlet is located on the side of the second cover body 19 facing the motor 13. The inner diameter of the sleeve portion 180 is slightly larger than the flange 24 of the valve stem 2, which can guide the movement of the valve stem 2. In this embodiment, the air supplied to the external air inlet 14 comes from outside the vacuum cleaner. In other embodiments, this can also be the case: the air filtered by the filter 50 is supplied to the external air inlet 14 via a certain air duct. The second cover body 19 is fixed to the wind hood 56, and the wind hood 56 and the tray 4 are located on the upper and lower sides of the bottom cover 55.

[0065] The exhaust port 40 is circular, and the tray 4 also includes a first curved wall 45 surrounding one side of the exhaust port 40, and the first curved wall 45 extends upward. The exhaust port 40 and the vent 43 are located on opposite sides of the first curved wall 45 in the transverse direction, where the transverse direction is relative to the longitudinal direction, and the up and down direction is the longitudinal direction; the tray 4 also includes a second curved wall 46, and an arc groove 47 is formed between the first curved wall 45 and the second curved wall 46, and the second frame 54 is provided with a third curved wall 540 assembled to the arc groove 47. The first curved wall 45, the second curved wall 46, the third curved wall 540, and the arc groove 47 are respectively arc-shaped and are respectively located between the exhaust port 40 and the vent 43, the first curved wall 45 constitutes a part of the third frame 412, the second curved wall 46 constitutes a part of the first frame 411, and the arc groove 47 constitutes a part of the matching groove 413.

[0066] During the process of the valve stem 2 moving from the initial position to the end position of the stroke, the electromagnetic driving force direction of the electromagnetic coil module 3 on the valve stem 2 is consistent with the running direction of the valve stem 2. The electromagnetic driving force direction is consistent with the running direction of the valve stem 2, that is, the electromagnetic driving force direction is substantially the same as the running direction of the valve stem 2. The valve stem 2 can move a first preset distance under the action of the electromagnetic force and move from the original position to the valve opening position. The first preset distance is 2 cm to 10 cm. The distance between the valve opening position of the valve stem 2 and the end position of the stroke of the valve stem 2 is 2.5 cm to 10 cm.

[0067] In this embodiment, the valve stem 2 can move the closing valve 15 from the closed position and can drive the closing valve 15 to rush toward the valve stem 2 of the filter device. The closing valve 15 can impact the filter device under the drive of the valve stem 2. With such a design, the valve stem 2 drives the closing valve 15 to rush toward the filter device and causes an impact on the filter device, which can produce a relatively strong vibration to the filter device, effectively shake off the dust accumulated in the filter device, and clean the filter device, thereby providing a vacuum cleaner with a good filter 50 cleaning effect.

[0068] In this embodiment, when the closing valve 15 impacts the tray 4, the closing valve 15 is not in contact with the filter device, and the impact is transmitted by the second elastic member 17; the tray 4 is fixed to the bottom cover 55, and the bottom cover 55 is disc-shaped. In this embodiment: the impact of the closing valve 15 on the tray 4 is transmitted to the tray 4 by the second elastic member 17, and the closing valve 15 is not in contact with the tray 4 during the impact. When the valve stem 2 moves to the end position of the stroke, the impact of the closing valve 15 on the biasing part 41 is transmitted to the biasing part 41 by the second elastic member 17, and the closing valve 15 impacts the biasing part 41 by the second elastic member 17. The biasing part 41 is provided with an annular rib position 414 and a plurality of support rib positions 415 distributed in a radial shape, one end of the second elastic member 17 is pressed against the support rib position 415, and the annular rib position 414 surrounds the support rib position 415. The tray 4 is an integrally formed one-piece part, and the tray 4 is also provided with an annular mounting portion 48, and one end of the filter 50 is sleeved on the annular mounting portion 48. The annular rib 414 is in a circular ring shape, and the supporting rib 415 extends radially along the annular rib 414. The valve stem 2 pushes the closing valve 15 toward the filter device through the second end 23, further, the valve stem 2 pushes the closing valve 15 toward the tray 4 through the second end 23, and further, the valve stem 2 pushes the closing valve 15 toward the biasing portion 41 through the second end 23.

[0069] In other embodiments, when the closing valve 15 impacts the tray 4, the closing valve 15 may contact the filter device, thereby directly impacting the filter device, for example, by means of the protrusion 150 provided on the closing valve 15, the protrusion 150 protrudes in a direction away from the valve stem 2, and the protrusion 150 is located on the side of the closing valve 15 facing the tray 4; further, the protrusion 150 is located on the side of the closing valve 15 facing the biasing portion 41; when the valve stem 2 moves to the end position of the stroke, the protrusion 150 contacts and impacts the filter device; further, when the valve stem 2 moves to the end position of the stroke, the protrusion 150 contacts and impacts the tray 4 of the filter device; further, when the valve stem 2 moves to the end position of the stroke, the protrusion 150 contacts and impacts the biasing portion 41. The protrusion 150 includes a plurality of staggered ribs 151. The protrusion 150 extends downward.

[0070] When the vacuum cleaner is working, the motor 13 drives the impeller to perform suction, and dirty air carrying dust, debris and other garbage is sucked into the dust collecting container 10 through the dirty air inlet 100 of the dust collecting container 10, and filtered by the filter 50. The dust, debris and other garbage remain in the dust collecting container 10, and the air filtered by the filter 50 passes through the air suction port 40, the impeller, and is discharged from the vacuum cleaner through the air duct of the wind hood 56 and the discharge port 560 of the wind hood 56 in turn; during the suction operation of the vacuum cleaner, when it is necessary to clean the filter 50, the electromagnetic coil module 3 is energized, and the valve stem 2 starts to move from the initial position under the electromagnetic driving force of the electromagnetic coil module 3, and the valve stem 2 first impacts the closing valve 15 to move the closing valve 15 from The external air inlet 14 is removed. At this time, under the action of the negative air pressure in the dust collecting container 10, the air can enter the filter 50 through the ventilation window 441, the second air inlet, the first air inlet 182, the external air inlet 14, and the ventilation port 43, effectively blowing the dust accumulated in the filter 50 into the dust collecting container 10 to clean the filter 50. The above cleaning process can be summarized as a backwash airflow cleaning filter 50; further, the valve stem 2 drives the closing valve 15 to directly or indirectly impact the tray 4, causing a relatively strong vibration to the tray 4, and indirectly shaking the dust accumulated in the filter 50 into the dust collecting container 10. The above cleaning process can be summarized as an impact vibration cleaning filter 50.

[0071] In the present embodiment, when the filter 50 is not cleaned, the electromagnetic coil module 3 is not passed through the excitation current, the valve stem 2 remains in the initial position, and the stroke end position is the position of the valve stem 2 when the valve stem 2 and the closing valve 15 together press and connect the second elastic member 17. The initial position of the closing valve 15 is the said closing position. When the closing valve 15 leaves the closing position and continues to move toward the tray 4, it moves together with the valve stem 2. Therefore, when the closing valve 15 reaches its stroke end position, the valve stem 2 also reaches its stroke end position. In other embodiments, the impact force of the valve stem 2 can be weaker, so that the closing valve 15 and the valve stem 2 can reach their respective stroke end positions before the second spring reaches the pressing state. The external air inlet 14 is closed by means of the closing valve 15; in this embodiment, the electromagnetic coil module 3 can be automatically started multiple times in a short period of time when the vacuum cleaner starts to suck through program setting, and the single power-on time of the electromagnetic coil module 3 is basically equal to the time for the valve stem 2 to run from the initial position to the end position of the stroke (about 0.015 seconds to 0.03 seconds). The electromagnetic coil module 3 is powered off during the reset stroke, and under the action of the second elastic member 17, the closing valve 15 is reset from its end position of the stroke to the closed position, and under the action of the first elastic member 16 and the second elastic member 17, the valve stem 2 is first reset to the open valve position, and then under the first elastic member 16, the valve stem 2 is further reset from the open valve position to the initial position.

[0072] The valve stem 2 is substantially vertical, the magnetizable section 20 and the non-magnetizable section 21 are substantially vertical, the running direction of the valve stem 2 is the up-down direction, and the closing valve 15 moves vertically downward under the push of the valve stem 2 and gradually moves away from the external air inlet 14; the closing valve 15 is circular as a whole. The valve stem 2, the electromagnetic coil module 3, and the closing valve 15 are located above the tray 4, and the valve stem 2, the electromagnetic coil module 3, and the closing valve 15 are located above the offset portion 41.

[0073] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A vacuum cleaner comprising a dust collecting container, a motor for providing suction power, an external air inlet, a closing valve for closing the external air inlet when in a closed position, and a filtering device for filtering dirty air, characterized in that: It also includes a valve stem that can move the closing valve from the closing position and drive the closing valve to the filter device, and the closing valve can impact the filter device under the drive of the valve stem; the vacuum cleaner also includes an electromagnetic coil module for driving the valve stem, the electromagnetic coil module is provided with a through channel that penetrates the electromagnetic coil module, and the valve stem is at least partially penetrated by the through channel; the capacity of the dust collecting container is between 0.5 gallons and 30 gallons; the valve stem has an initial position, a stroke end position, and an open valve position between the initial position and the stroke end position, the valve stem is separated from the closing valve at the initial position, and can contact the closing valve in the closed position when the valve stem moves to the open valve position; the vacuum cleaner also includes a second elastic member between the closing valve and the filter device, the second elastic member is a spring; when the valve stem moves to the stroke end position, the second elastic member is in a compressed state and the compressed second elastic member blocks the closing valve and the impact of the closing valve on the filter device is transmitted to the filter device through the compressed second elastic member.

2. The vacuum cleaner according to claim 1, characterized in that: The second elastic member and the valve stem are located on opposite sides of the closing valve.

3. The vacuum cleaner according to claim 1, characterized in that: The closing valve is held in the closing position by the elastic force of the second elastic member. The valve stem can overcome the elastic force of the second elastic member to move the closing valve from the closing position. The second elastic member is always in a compressed state between the closing valve and the filter device.

4. The vacuum cleaner according to claim 1, characterized in that: The filtering device includes a tray and a filter installed on the tray. The tray is provided with an exhaust port. The air filtered by the filter flows through the exhaust port. One end of the second elastic member presses against the tray and the other end presses against the closing valve. When the valve stem moves to the end position of the stroke, the closing valve impacts the tray by the compressed second elastic member.

5. The vacuum cleaner according to claim 4, characterized in that: The tray is provided with a biasing portion biased to one side of the tray, the second elastic member is between the closing valve and the biasing portion, one end of the second elastic member is pressed against the biasing portion, when the valve stem moves to the end position of the stroke, the closing valve impacts the biasing portion through the compressed second elastic member.

6. The vacuum cleaner according to claim 5, characterized in that: The tray is also provided with a main body, the offset part is offset to one side of the main body and is formed integrally with the main body, the air outlet is arranged in the main body, the motor is located on the upper side of the tray and the filter is located on the lower side of the tray, and the filter is cylindrical.

7. The vacuum cleaner according to claim 5, characterized in that: The offset portion is provided with a circular ring rib and a plurality of supporting ribs distributed in a radial shape, one end of the second elastic member is pressed against the supporting rib, and the circular ring rib surrounds the supporting rib.

8. The vacuum cleaner according to claim 5, characterized in that: The tray is provided with at least one vent spaced from the air exhaust port. When cleaning the filter, air can sequentially pass through the opened external air inlet and the vent and be applied to the surface of the filter facing away from the dust collection container.

9. The vacuum cleaner according to claim 8, characterized in that: It also includes a first chamber, the second elastic member is located in the first chamber, the external air inlet constitutes the air inlet of the first chamber, the vent constitutes the air outlet of the first chamber, and the offset portion is spaced between the first chamber and the internal space of the dust collecting container.

10. The vacuum cleaner according to claim 9, characterized in that: The offset portion is provided with a bottom wall and a first frame surrounding the second elastic member. The vacuum cleaner also includes a top wall opposite to the bottom wall and a second frame surrounding the second elastic member. The first frame and the second frame are respectively located between the bottom wall and the top wall. The external air inlet is located on the top wall. The vent is opened on the bottom wall. The bottom wall, the first frame, the top wall and the second frame form the first chamber.

11. The vacuum cleaner according to claim 10, characterized in that: The tray is provided with a third frame surrounding the first frame, the first frame and the third frame are spaced apart to form a matching groove surrounding the second elastic member, and the second frame is assembled into the matching groove.

12. The vacuum cleaner according to claim 1, characterized in that: The utility model also comprises casters which are arranged at the bottom of the dust collecting container.

13. The vacuum cleaner according to claim 1, characterized in that: It also includes a first elastic member for keeping the valve stem in an initial position. The first elastic member is sleeved on the valve stem and located between the electromagnetic coil module and the first end of the valve stem. One end of the first elastic member presses against the electromagnetic coil module.

14. A vacuum cleaner comprising a dust collecting container, a motor for providing suction power, an external air inlet, a closing valve for closing the external air inlet when in a closed position, and a filtering device for filtering dirty air, characterized in that: The vacuum cleaner also includes a valve stem that can move the closing valve from the closing position and drive the closing valve to the filter device, and the closing valve can impact the filter device under the drive of the valve stem; the vacuum cleaner also includes an electromagnetic coil module for driving the valve stem, the electromagnetic coil module is provided with a through channel penetrating the electromagnetic coil module, and the valve stem is at least partially penetrated through the through channel; the capacity of the dust collecting container is between 0.5 gallons and 30 gallons; the valve stem has an initial position, a stroke end position, and an open valve position between the initial position and the stroke end position, the valve stem is separated from the closing valve at the initial position, and the valve stem can contact the closing valve in the closed position when it moves to the open valve position; the valve stem includes a first end that is always located outside the electromagnetic coil module and a second end opposite to the first end, the first end and the closing valve are located on opposite sides of the electromagnetic coil module, the first end of the valve stem and the closing valve are located on opposite sides of the electromagnetic coil module, and relative to the valve stem at the valve open position and the stroke end position, the first end of the valve stem is farther away from the electromagnetic coil module when the valve stem is in the initial position.

15. The vacuum cleaner according to claim 14, characterized in that: It also includes a first elastic member for keeping the valve stem in an initial position. The first elastic member is sleeved on the valve stem and located between the electromagnetic coil module and the first end of the valve stem. One end of the first elastic member presses against the electromagnetic coil module.

16. The vacuum cleaner according to claim 15, characterized in that: The valve stem is provided with a flange located outside the electromagnetic coil module, and the first elastic member is pressed between the electromagnetic coil module and the flange. The first elastic member is a spring whose radial dimension gradually decreases from the middle to both ends.

17. The vacuum cleaner according to claim 14, characterized in that: When the valve stem is at the initial position, the second end is located in the through channel of the electromagnetic coil module. When the valve stem is at the end position of the stroke, the second end is located outside the electromagnetic coil module and the first end and the second end are located on opposite sides of the electromagnetic coil module.

18. The vacuum cleaner according to claim 14, characterized in that: The valve stem is provided with a magnetizable section that can be magnetized by the electromagnetic coil module and a non-magnetizable section that cannot be magnetized by the electromagnetic coil module. The magnetizable section and the non-magnetizable section are fixed together. The magnetizable section is located between the non-magnetizable section and the closing valve. The magnetizable section has a head end and a tail end opposite to each other in the movement direction of the valve stem. The tail end is located between the non-magnetizable section and the head end. When the valve stem is in the initial position, the non-magnetizable section is at least partially located within the electromagnetic coil module. When the valve stem is in the end position of the stroke, the non-magnetizable section is at least partially located outside the electromagnetic coil module.

19. The vacuum cleaner according to claim 18, characterized in that: The center position of the magnetizable section between the opposite ends of the valve stem movement direction is always located between the center position of the electromagnetic coil module through channel between the opposite ends of the valve stem movement direction and the closed valve, or, when the valve stem is at the end position of the stroke, the center position of the magnetizable section between the opposite ends of the valve stem movement direction overlaps with the center position of the electromagnetic coil module through channel between the opposite ends of the valve stem movement direction.

20. The vacuum cleaner according to claim 18, characterized in that: The head end of the magnetizable section and the closing valve are located on opposite sides of the electromagnetic coil module, the head end of the magnetizable section is always located outside the electromagnetic coil module, when the valve stem is at the end position of the stroke, the tail end is located outside the electromagnetic coil module and is located on opposite sides of the electromagnetic coil module with the head end, when the valve stem is at the end position of the stroke, the distance that the tail end exceeds the electromagnetic coil module in the direction of valve stem movement is less than the distance that the head end exceeds the electromagnetic coil module.

21. The vacuum cleaner according to claim 20, characterized in that: When the valve stem is in the initial position, the tail end of the magnetizable section is located inside the electromagnetic coil module.

22. The vacuum cleaner according to claim 18, characterized in that: When the valve stem is in the initial position, the non-magnetizable section is completely located within the solenoid coil module.

23. The vacuum cleaner according to claim 18, characterized in that: When the valve stem moves to the valve opening position, the non-magnetizable section can contact the closing valve in the closing position, and the valve stem pushes the closing valve through the non-magnetizable section.

24. The vacuum cleaner according to claim 18, characterized in that: The magnetizable section is provided with a mounting hole extending from the tail end into the magnetizable section, the non-magnetizable section is fixed to the mounting hole, the mounting hole is provided with an internal thread, and the non-magnetizable section is provided with an external thread screwed with the internal thread.

25. The vacuum cleaner according to claim 18, characterized in that: The magnetizable section and the non-magnetizable section are respectively in the form of columns. The magnetizable section is an iron column or a steel column or a column containing more than half of iron, and the non-magnetizable section is a copper column or an aluminum column or a copper-aluminum alloy column or a plastic column.

26. The vacuum cleaner according to claim 14, characterized in that: It also includes a first elastic member for maintaining the valve stem in an initial position, a first cover body covering the valve stem and the first elastic member, the first elastic member is sleeved on the valve stem, the first cover body is provided with a sleeve portion surrounding the valve stem and the first elastic member, and a plurality of mounting legs, and a first air inlet connected to the external air inlet fluid is formed between adjacent mounting legs.

27. The vacuum cleaner according to claim 26, characterized in that: The second cover body also includes a second cover body covering the first cover body, wherein the second cover body is provided with a second air inlet in fluid communication with the first air inlet.

28. The vacuum cleaner according to claim 27, characterized in that: It also includes a head shell, a first cover body, a second cover body, and an electromagnetic coil module are located inside the head shell. The head shell is provided with a handle for moving the vacuum cleaner and a ventilation window. Air can flow to the external air inlet through the ventilation window, the second air inlet, and the first air inlet in sequence.

29. The vacuum cleaner according to claim 14, characterized in that: The second end is located between the first end and the closing valve, the closing valve is located between the valve stem and the filter device, and the valve stem pushes the closing valve toward the filter device through the second end.

30. The vacuum cleaner according to claim 14, characterized in that: The filtering device also includes a tray and a filter installed on the tray. The valve stem can move from an initial position to a stroke end position under the drive of the electromagnetic coil module. When the valve stem moves to the stroke end position, the closing valve contacts and impacts the tray.

31. The vacuum cleaner according to claim 30, characterized in that: The tray is provided with a biasing portion biased to one side of the tray. When the valve stem moves to the end position of the stroke, the closing valve contacts and impacts the biasing portion.

32. The vacuum cleaner according to claim 30, characterized in that: The closing valve is provided with a protrusion protruding in a direction away from the valve stem. When the valve stem moves to the end position of the stroke, the protrusion contacts and impacts the tray.

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