Vacuum cleaner

Abstract

The present application discloses a vacuum cleaner. The vacuum cleaner comprises: a housing, wherein the housing is provided with an air inlet and an air outlet, the housing is internally provided with a motor cavity, a filter cavity, and a piston cavity, and the piston cavity is located between the motor cavity and the filter cavity; a motor, mounted in the motor cavity, wherein the motor is configured to generate negative pressure so as to form an airflow passage between the air inlet and the air outlet; a filter, mounted in the filter cavity, located in the airflow passage, and configured to filter contaminants from the airflow; and a piston, mounted in the piston cavity and configured to drive the airflow to flow in a reverse direction through the filter so as to clean the filter. The housing is further internally provided with a transition cavity, the transition cavity is located between the filter cavity and the piston cavity, the transition cavity and the piston cavity are substantially arranged along a first straight line direction, and the transition cavity and the filter cavity are substantially arranged along a second straight line direction, wherein the first straight line and the second straight line define an angle therebetween. In the vacuum cleaner, the internal cavities are arranged in a staggered manner, so that the internal structure of the vacuum cleaner is more compact, and the layout is more reasonable.

Description

vacuum cleaner Technical Field

[0001] This application relates to the field of mechanical design and manufacturing technology, and in particular to a dust collection device. Background Technology

[0002] Vacuum cleaner filters typically have a self-cleaning function, designed to reduce the frequency of manual filter cleaning, ensure continuous and efficient operation of the vacuum cleaner, and extend the lifespan of the device. Generally, self-cleaning can be achieved through reverse airflow, vibration, or an automatic emptying station. When self-cleaning is achieved through reverse airflow, the basic principle is that a piston structure compresses gas to create an airflow that impacts the filter in the opposite direction, thus achieving self-cleaning.

[0003] In the prior art, some vacuum cleaners house the piston structure and filter in the same chamber (i.e., piston chamber), with all chambers arranged in a straight line. This structural layout increases the overall width or height of the vacuum cleaner, and the internal structure needs to be optimized.

[0004] Therefore, how to optimize the internal structural design of vacuum cleaners is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] Utility Model Content

[0006] In view of this, the purpose of this application is to provide a vacuum cleaner that allows for a more compact internal structure and a more rational layout.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A vacuum cleaner device, comprising:

[0009] The housing has an air inlet and an air outlet, and the housing contains a motor cavity, a filter cavity, and a piston cavity, with the piston cavity located between the motor cavity and the filter cavity;

[0010] A motor is installed in the motor cavity, and the motor is used to generate negative pressure to form an airflow channel between the air inlet and the air outlet;

[0011] A filter, installed in the filter chamber and located in the airflow channel, is used to filter contaminants in the airflow;

[0012] A piston body, installed in the piston chamber, is used to drive airflow in the opposite direction through the filter to clean the filter;

[0013] The housing also includes a transition cavity located between the filter cavity and the piston cavity. The transition cavity and the piston cavity are generally aligned in a first straight line direction, and the transition cavity and the filter cavity are generally aligned in a second straight line direction, wherein the first straight line and the second straight line form an angle.

[0014] Optionally, in the above-mentioned vacuuming device, the transition chamber is provided with a first opening communicating with the piston chamber on the side near the piston chamber;

[0015] In the first state, the motor generates negative pressure, the piston body moves away from the first opening, and the transition chamber and the piston chamber are connected to form part of the airflow channel;

[0016] In the second state, the piston moves toward the first opening to compress at least a portion of the gas in the piston chamber and allow it to enter the transition chamber through the first opening to clean the filter.

[0017] Optionally, in the above-mentioned vacuuming device, a second opening is provided on the side of the piston chamber near the motor chamber;

[0018] A gap is left between the piston body and the piston cavity, which allows the first opening and the second opening to connect.

[0019] Optionally, in the above-described vacuuming device, the piston chamber includes:

[0020] A first sidewall with the first opening is provided;

[0021] The second sidewall is provided with the second opening;

[0022] A third sidewall is located between the first sidewall and the second sidewall. The third sidewall includes a planar area and a curved area. The gap is provided between the planar area and the piston body. The curved area is provided with a groove that is recessed relative to the planar area in a direction further away from the piston body.

[0023] Optionally, in the above-mentioned vacuuming device, an arc-shaped air guide surface is provided at the connection between the planar area and the curved area.

[0024] Optionally, the above-mentioned vacuuming device also includes an air supply valve;

[0025] The housing is provided with an air inlet, which is connected to the air inlet of the motor and the second opening respectively;

[0026] In the first state, the air supply valve closes the air supply port;

[0027] In the second state, the air supply valve opens the air supply port.

[0028] Optionally, the above-mentioned vacuuming device also includes an elastic element;

[0029] In the first state, the piston moves toward the second opening to cause the elastic element to undergo compressive deformation;

[0030] In the second state, the elastic element, under the action of its own elastic restoring force, cooperates with the air supply valve to drive the piston body to move towards the first opening.

[0031] Optionally, in the above-mentioned vacuuming device, a limiting part is provided on the side of the piston chamber near the motor chamber;

[0032] In the first state, the limiting part is engaged with the piston body;

[0033] In the second state, the limiting part is disengaged from the piston body.

[0034] Optionally, in the above-mentioned vacuuming device, the limiting part protrudes into the piston chamber;

[0035] The piston body is provided with a snap-fit ​​part on the side away from the first opening;

[0036] The snap-fit ​​portion includes a cylindrical protrusion, and the limiting portion includes a groove, through hole, or gap that can be snapped into and adapted to the cylindrical protrusion; or, the limiting portion includes a cylindrical protrusion, and the snap-fit ​​portion includes a groove, through hole, or gap that can be snapped into and adapted to the cylindrical protrusion.

[0037] Optionally, in the above-described vacuuming device, the angle between the first straight line and the second straight line is 90°.

[0038] As can be seen from the above technical solution, in the dust collection device provided by this application, on the one hand, the filter and the piston body are respectively placed in the filter chamber and the piston chamber, and a transition chamber is provided between the filter chamber and the piston chamber. During self-cleaning, the airflow generated by the piston body in the piston chamber can be transmitted in the opposite direction to the filter chamber through the transition chamber. The flow direction of this airflow is opposite to the airflow direction in the dust collection process, which can impact the filter with airflow to blow the dust and other dirt attached to the filter into the dust bin, thereby realizing the self-cleaning of the filter. On the other hand, the piston chamber and the transition chamber are generally arranged in the first straight line direction, and the transition chamber and the filter chamber are generally arranged in the second straight line direction. Compared with the method of arranging all chambers in the same straight line direction, this method of arranging the chambers in a staggered manner can make the internal structure of the device more compact and the layout more reasonable. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 is a front sectional view of a vacuuming device in a first state (i.e., vacuuming state) provided in an embodiment of this application.

[0041] Figure 2 is an enlarged view of the rectangular dashed line area in Figure 1.

[0042] Figure 3 is a schematic diagram of the region division of a piston cavity provided in an embodiment of this application.

[0043] Figure 4 is a front sectional view of a vacuum cleaner device in a second state (i.e., self-cleaning state) provided in an embodiment of this application.

[0044] Figure 5 is an enlarged view of the rectangular dashed line area in Figure 4.

[0045] Figure 6 is an isometric sectional view of a vacuuming device in a first state (i.e., vacuuming state) provided in an embodiment of this application.

[0046] Figure 7 is an enlarged view of the rectangular dashed line area in Figure 6.

[0047] Figure 8 is an isometric sectional view of a vacuum cleaner in a second state (i.e., self-cleaning state) provided in an embodiment of this application.

[0048] Figure 9 is an enlarged view of the rectangular dashed line area in Figure 8.

[0049] Figure 10 is a structural schematic diagram of a box component used to form the third sidewall according to an embodiment of this application.

[0050] Figure 11 is a schematic diagram of the structure of a piston body provided in an embodiment of this application.

[0051] Figure 12 is a schematic diagram of the top structure of a lower cover of a housing provided in an embodiment of this application.

[0052] Figure 13 is a schematic diagram of the bottom structure of a housing cover provided in an embodiment of this application (the housing cover is equipped with a filter, a piston body and an elastic element).

[0053] Figure 14 is an enlarged view of the region where the piston chamber is located in Figure 13.

[0054] Figure 15 is a schematic diagram of the bottom structure of a housing cover provided in an embodiment of this application (without filter, piston body and elastic element installed).

[0055] Figure 16 is a schematic diagram of the airflow path of a vacuuming device in the first state (i.e., vacuuming state) according to an embodiment of this application.

[0056] Figure 17 is a schematic diagram of the airflow path of a vacuum cleaner device provided in this application embodiment when it is in the second state (i.e., the self-cleaning state).

[0057] Figure 18 is a piston cavity structure with the third cavity area located below the piston body according to an embodiment of this application, and a schematic diagram of the airflow path when the piston body is in the first state (i.e., the dust suction state).

[0058] Figure 19 is a schematic diagram of a piston cavity structure with the third cavity area located below the piston body, provided by an embodiment of this application, and the airflow path when the piston body is in the second state (i.e., the self-cleaning state).

[0059] Figure 20 is a piston cavity structure with the third cavity area located above the piston body according to an embodiment of this application, and a schematic diagram of the airflow path when the piston body is in the first state (i.e., the dust suction state).

[0060] Figure 21 is a schematic diagram of a piston cavity structure with the third cavity area located above the piston body, provided by an embodiment of this application, and the airflow path when the piston body is in the second state (i.e., the self-cleaning state).

[0061] Wherein: 1-Filter, 2-Spray plate, 4-Motor, 5-Vortex, 6-Air supply valve, 10-Filter chamber, 20-Transition chamber, 21-Spray hole, 30-Piston chamber, 31-Piston body, 32-Elastic element, 30a-First chamber area, 30b-Second chamber area, 30c-Third chamber area, 40-Motor chamber, 41-Motor air inlet, 50-Main air duct, 60-Air supply port, 100-Air inlet, 200-Air outlet, 101-First opening, 401-Second opening, 301-First sidewall, 302-Second sidewall, 303-Third sidewall, 304-Limiting part, 311-Snap-fit ​​part, 312-Spring mounting part, 331-Planar area, 332-Curved surface area, 333-Arc-shaped air guide surface. Detailed Implementation

[0062] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0063] Please refer to Figure 1. This application embodiment provides a vacuum cleaner, which includes a housing, a motor 4, a filter 1, and a piston 31. The housing has an air inlet 100 and an air outlet 200. The housing contains a motor cavity 40, a filter cavity 10, and a piston cavity 30. The piston cavity 30 is located between the motor cavity 40 and the filter cavity 10, i.e., the motor cavity 40, piston cavity 30, and filter cavity 10 are connected in sequence. The motor 4 is installed in the motor cavity 40 and is used to generate negative pressure to form an airflow channel between the air inlet 100 and the air outlet 200. The filter 1 is installed in the filter cavity 10 and is located in the airflow channel to filter dirt in the airflow. The piston 31 is installed in the piston cavity 30 and is used to drive the airflow in the opposite direction through the filter 1 to clean the filter 1. Furthermore, the housing also includes a transition cavity 20, located between the filter cavity 10 and the piston cavity 30. The transition cavity 20 and the piston cavity 30 are generally arranged in a first straight line direction, and the transition cavity 20 and the filter cavity 10 are generally arranged in a second straight line direction, with the first and second straight lines having an angle greater than zero. For example, as shown in Figure 1, the transition cavity 20 and the piston cavity 30 are generally arranged in the first straight line direction, which is the horizontal direction; the transition cavity 20 and the filter cavity 10 are generally arranged in the second straight line direction, which is the vertical direction perpendicular to the horizontal plane. At this time, the angle between the first and second straight lines is 90°. The transition cavity 20, the piston cavity 30, and the motor cavity 40 are arranged side by side in the first straight line direction parallel to the horizontal plane, with the transition cavity 20 located directly above the filter 1, and the suction end of the filter 1 facing downwards. However, it is not limited to this. In other embodiments, the included angle can also be 60° or 45° or any other arbitrary angle, as long as the filter chamber 10, transition chamber 20, piston chamber 30 and motor chamber 40 are connected in sequence to ensure the normal operation and self-cleaning of the dust collection device.

[0064] In the vacuuming device provided in this application, on the one hand, the filter 1 and the piston body 31 are respectively placed in the filter chamber 10 and the piston chamber 30, and a transition chamber 20 is provided between the filter chamber 10 and the piston chamber 30. During self-cleaning, the airflow generated by the piston body 31 in the piston chamber 30 can be transmitted in the opposite direction to the filter chamber 10 through the transition chamber 20. The flow direction of this airflow is opposite to the airflow direction during the vacuuming process, which can impact the filter 1 to blow the dust and other dirt attached to the filter 1 into the dust bin, thereby achieving self-cleaning of the filter 1. On the other hand, the piston chamber 30 and the transition chamber 20 are generally arranged in a first straight line direction, and the transition chamber 20 and the filter chamber 10 are generally arranged in a second straight line direction. Compared with the method of arranging all chambers in the same straight line direction, this method of arranging the chambers in a staggered manner can make the internal structure of the device more compact and the layout more reasonable.

[0065] Furthermore, since the transition chamber 20 is located between the filter chamber 10 and the piston chamber 30, regardless of the direction of the piston chamber 30 in the filter chamber 10, the airflow from the piston chamber 30 can be transmitted to the filter 1 relatively evenly through the transition chamber 20. It can also transmit the airflow filtered by the filter chamber 10 to the motor chamber 40 after passing through the transition chamber 20 and the piston chamber 30. In short, the dust collection device provided in this application, due to the provision of the transition chamber 20, allows for various arrangements of the relative positions of the piston chamber 30 and the filter chamber 10 while ensuring basic functionality, making the product design more flexible. Therefore, in some embodiments, the arrangement direction of the transition chamber 20 and the piston chamber 30 (i.e., the first straight line direction) can be angled with the arrangement direction of the transition chamber 20 and the filter chamber 10 (i.e., the second straight line direction, which is also the airflow direction in the filter 1). The size of this angle can be specifically set according to actual needs, meaning that the filter chamber 10 can be placed in any position of the piston chamber 30 according to actual needs. For example, as shown in Figure 1, the piston body 3 can move horizontally, with the transition chamber 20 located to the right of the piston chamber 30 and the filter chamber 10 located below the transition chamber 20, i.e., the filter chamber 10 is located to the lower right of the piston chamber 30. In this case, the dust-collecting end of the filter 1 in the dust bin can face downwards or tilt downwards. This not only lowers the center of gravity but also facilitates the return of accumulated dust and other contaminants on the filter 1 to the dust bin under its own gravity and / or the action of reverse airflow, resulting in a higher cleaning effect. However, this is not the only option. In other embodiments, the filter chamber 10 can be positioned in other locations within the piston chamber 30 according to actual needs.

[0066] Referring to Figures 1 and 2, in some embodiments, the piston cavity 30 has a first opening 101 on the side near the transition cavity 20, and a second opening 401 on the side near the motor cavity 40. Thus, the piston cavity 30 communicates with the transition cavity 20 through the first opening 101 and with the motor cavity 40 through the second opening 401. Furthermore, the orientation of the first opening 101 and the second opening 401 is consistent with the moving direction of the piston body 31. In addition, a gap is left between the piston body 31 and the sidewall of the piston cavity 30 to allow communication between the first opening 101 and the second opening 401. Specifically, this gap can be formed between the bottom of the piston cavity 30 and the piston body 31 (see Figures 18 and 19), or, in other embodiments, the gap can be formed between the top of the piston cavity 30 and the piston body 31 (see Figures 20 and 21).

[0067] Specifically, please refer to Figures 1 and 2, 6 and 7, and Figure 16. When the vacuum cleaner is in the first state, the motor 4 generates negative pressure, and the piston 31 moves towards the second opening 401 to move away from the first opening 101, keeping the first opening 101 open. At this time, the filter chamber 10, the transition chamber 20, and the piston chamber 30 are connected in sequence to form a partial airflow channel. The gas entering the dustbin from the housing inlet 100 passes through the filter 1, the transition chamber 20, the piston chamber 30, the motor 4, and the main air duct 50, and then flows out of the vacuum cleaner from the housing outlet 200, realizing the vacuuming and filtering process. Please refer to Figures 4 and 5, 8 and 9, and Figure 17. When the vacuum cleaner is in the second state, the piston 31 moves rapidly towards the first opening 101 until the first opening 101 is closed, thereby compressing at least part of the gas in the piston chamber 30 to form a compressed airflow that enters the transition chamber 20 in the opposite direction. This compressed airflow then impacts the filter 1 in the reverse direction, thus cleaning the filter 1.

[0068] In some embodiments, in order to improve the impact effect of the reverse airflow on the filter 1, a spray plate 2 is provided on the side of the transition cavity 20 near the filter 1. The spray plate 2 is provided with multiple spray holes 21. The airflow in the transition cavity 20 can be decomposed into multiple air paths through the spray holes 21 and guided to blow towards the filter 1, thereby playing the role of multi-hole spray, which is beneficial to improving the cleaning effect.

[0069] Referring to Figures 3 and 10, in some embodiments, the piston chamber 30 mainly includes a first sidewall 301 and a second sidewall 302 arranged opposite to each other, a third sidewall 303 located between the first sidewall 301 and the second sidewall 302, and a fourth sidewall located opposite the third sidewall 303. Specifically: the first sidewall 301 and the second sidewall 302 are respectively provided with a first opening 101 and a second opening 401; the third sidewall 303 includes a planar region 331 and a curved region 332, with a gap between the planar region 331 and the piston body 31, and the curved region 332 having a groove recessed relative to the planar region 331 in a direction further away from the piston body 31 (i.e., the third cavity region 30c mentioned below). Furthermore, an arc-shaped air guide surface 333 is provided at the connection between the planar region 331 and the curved region 332. Through the aforementioned gap, groove, and arc-shaped air guide surface 333, airflow from the transition chamber 20 can easily pass through the piston chamber 30.

[0070] Specifically, referring to Figures 2 and 3, the piston chamber 30 includes a first chamber region 30a and a second chamber region 30b arranged adjacent to each other in a first straight direction, and a third chamber region 30c located on the same side of the first chamber region 30a and the second chamber region 30b and communicating with them. The piston body 31 is located within the first chamber region 30a and can reciprocate along the first straight direction. Furthermore, the sidewall of the first chamber region 30a away from the second chamber region 30b has a first opening 101 communicating with the transition chamber 20, and the sidewall of the second chamber region 30b away from the first chamber region 30a has a second opening 401 communicating with the motor chamber 40. When the vacuum cleaner is in the second state, the piston body 31 is away from the first opening 101 and maintains an appropriate distance from the second opening 401; when the vacuum cleaner is in the second state, the piston body 31 moves to the end of the first chamber region 30a away from the second chamber region 30b and closes the first opening 101.

[0071] As shown in Figures 1 and 2, and Figures 6 and 7, when the vacuum cleaner is in the first state, under the negative pressure generated by the motor 4, the piston 31 is located at the end of the first cavity 30a near the second cavity 30b. External air passes sequentially through the housing air inlet 100, dust bin, filter 1, transition cavity 20, first cavity 30a, third cavity 30c, second cavity 30b, motor cavity 40, motor air inlet 41, motor air outlet, main air duct 50, and housing air outlet 200. At this time, the dust removal function can be achieved through the filter 1, and in this process, each cavity area in the piston cavity 30 can be effectively utilized without wasting space. As shown in Figures 4 and 5, and Figures 8 and 9, when self-cleaning of the filter 1 is required, the vacuum cleaner switches from the first state to the second state. The piston 31 moves from one end of the first chamber 30a near the second chamber 30b to the end of the first chamber 30a away from the second chamber 30b, thereby compressing at least a portion of the gas in the first chamber 30a into the transition chamber 20, which impacts the filter 1 with a reverse airflow, thus achieving self-cleaning. Therefore, the vacuum cleaner provided in this application not only achieves vacuuming and self-cleaning functions but also fully utilizes the internal space of the piston chamber 30, avoiding waste of internal space.

[0072] It should be noted that, in specific implementations, the third cavity region 30c can be located in the lower region of the piston cavity 30 (see Figures 18 and 19 for details), or, in other embodiments, the third cavity region 30c can be located in the upper region of the piston cavity 30 (see Figures 20 and 21 for details), or the third cavity region 30c can be located on the front and / or rear side of the piston cavity 30. This application does not specifically limit the position of the third cavity region 30c, as long as airflow can be ensured.

[0073] Please refer to Figures 1 and 2. In some embodiments, a filter channel is provided between the second opening 401 on one side of the piston chamber 30 and the motor air inlet 41. Furthermore, please refer to Figures 12 to 14. The dust collection device also includes a replenishing valve 6, and the housing has a replenishing port 60, which is controlled to open and close by the replenishing valve 6. The replenishing port 60 is connected to the motor air inlet 41 and the second opening 401 via the filter channel. In the first state, as shown in Figures 1 and 16, the replenishing valve 6 closes the replenishing port 60. At this time, the air inlet 100 on the housing, the dust bin, the filter chamber 10, the transition chamber 20, the piston chamber 30, the filter channel, the motor air inlet 41, the main air duct 50 (composed of a volute 5 surrounding the motor 4), and the air outlet 200 on the housing are sequentially connected, thereby achieving dust filtration. In the second state, as shown in Figures 4 and 17, the replenishing valve 6 opens the replenishing port 60, allowing the filter channel to connect with the outside of the dust collection device. The air pressure in the filter channel, the second opening 401, and the area where the second cavity 30b is located is directly connected to the atmospheric environment, so the air pressure in the area where the filter channel, the second opening 401, and the second cavity 30b are located instantly becomes positive pressure, while the air pressure in the first cavity 30a and the transition cavity 20 is still negative pressure. Under the action of the pressure difference on both sides, the piston 31 moves towards the first opening 101, and at the same time compresses the gas in the first cavity 30a and impacts it into the transition cavity 20 and the filter cavity 10, so that the filter 1 can achieve self-cleaning, until the piston 31 closes the first opening 101 and then quickly switches to the first state.

[0074] Please refer to Figures 5, 13, and 14. In some embodiments, the piston body 31 is further provided with an elastic element 32. One end of the elastic element 32 is connected to the side of the piston body 31 near the second opening 401, and the other end is connected to the second sidewall 302 of the piston cavity 30 near the motor cavity 40. In the first state, the piston body 31 moves towards the second opening 401, causing the elastic element 32 to compress and deform. In the second state, under the action of its own elastic restoring force, the elastic element 32, in conjunction with the air supply valve 6, drives the piston body 31 to move towards the first opening 101 until the first opening 101 is closed. It can be seen that the elastic element 32 can provide at least part of the driving force to the piston body 31 when the piston body 31 switches from the first state to the second state. In a specific implementation, the elastic element 32 is a compression spring, and the side of the piston body 31 near the second opening 401 is provided with a spring mounting part 312, as shown in Figures 9 and 11. The spring mounting part 312 is a boss structure used to connect with the compression spring. When the piston body 31 moves toward the second opening 401 to a stable state in the first state, the end of the compression spring away from the piston body 31 abuts against the second side wall 302 of the motor cavity 40.

[0075] Furthermore, a limiting part 304 protrudes from the piston cavity 30 near the motor cavity 40. Specifically, the limiting part 304 is located at the junction of the first cavity region 30a and the second cavity region 30b, and can limit the piston body 31. Moreover, a locking part 311 is provided on the side of the piston body 31 away from the first opening 101. In a specific implementation, the locking part 311 can include a cylindrical protrusion, and the limiting part 304 can include a groove, through hole, or gap that can be fitted with the cylindrical protrusion; or, the limiting part 304 can include a cylindrical protrusion, and the locking part 311 can include a groove, through hole, or gap that can be fitted with the cylindrical protrusion. In the first straight line direction, the distance L between the end face of the limiting part 304 used to limit the piston body 31 and the second opening 401 is greater than zero, so that the piston body 31 is always located in the first cavity area 30a, and the piston body 31 is prevented from entering the second cavity area 30b and closing the second opening 401 when it switches to the first state. As can be seen, the locking part 311 and the limiting part 304 constitute a movable latch, and: in the first state, the piston body 31 is locked by the limiting part 304, which can prevent insufficient gas thrust, rightward movement of the piston body 31, and impact on the air intake when there is a lot of dust in the dust bin, thus ensuring that the air intake of the piston chamber 30 is not affected; in the second state, the air pressure in the second chamber area 30b changes due to the opening of the air inlet 60, and the piston body 31 can be unlocked and disengaged from the limiting part 304 by the air pressure change and the restoring force of the elastic member 32, and move towards the direction of the first opening 101 and the transition chamber 20, so as to compress at least part of the gas in the first chamber area 30a into the transition chamber 20, and impact the filter 1 with reverse airflow to achieve self-cleaning.

[0076] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed.

[0077] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0078] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vacuuming device, comprising: The housing has an air inlet and an air outlet, and the housing contains a motor cavity, a filter cavity, and a piston cavity, with the piston cavity located between the motor cavity and the filter cavity; A motor is installed in the motor cavity, and the motor is used to generate negative pressure to form an airflow channel between the air inlet and the air outlet; A filter, installed in the filter chamber and located in the airflow channel, is used to filter contaminants in the airflow; A piston body, installed in the piston chamber, is used to drive airflow in the opposite direction through the filter to clean the filter; The feature is that: the housing further includes a transition cavity, the transition cavity is located between the filter cavity and the piston cavity, the transition cavity and the piston cavity are generally arranged in a first straight line direction, and the transition cavity and the filter cavity are generally arranged in a second straight line direction, wherein the first straight line and the second straight line have an angle.

2. The vacuuming device according to claim 1, characterized in that, The transition cavity has a first opening communicating with the piston cavity on the side near the piston cavity; In the first state, the motor generates negative pressure, the piston body moves away from the first opening, and the transition chamber and the piston chamber are connected to form part of the airflow channel; In the second state, the piston moves toward the first opening to compress at least a portion of the gas in the piston chamber and allow it to enter the transition chamber through the first opening to clean the filter.

3. The vacuuming device according to claim 2, characterized in that, The piston chamber has a second opening on the side near the motor chamber; A gap is left between the piston body and the piston cavity, which allows the first opening and the second opening to connect.

4. The vacuuming device according to claim 3, characterized in that, The piston chamber includes: A first sidewall with the first opening is provided; The second sidewall is provided with the second opening; A third sidewall is located between the first sidewall and the second sidewall. The third sidewall includes a planar area and a curved area. The gap is provided between the planar area and the piston body. The curved area is provided with a groove that is recessed relative to the planar area in a direction further away from the piston body.

5. The vacuuming device according to claim 4, characterized in that, An arc-shaped air guide surface is provided at the connection between the planar area and the curved area.

6. The vacuuming device according to claim 3, characterized in that, It also includes an air supply valve; The housing is provided with an air inlet, which is connected to the air inlet of the motor and the second opening respectively; In the first state, the air supply valve closes the air supply port; In the second state, the air supply valve opens the air supply port.

7. The vacuuming device according to claim 6, characterized in that, It also includes elastic components, In the first state, the piston moves toward the second opening to cause the elastic element to undergo compressive deformation; In the second state, the elastic element, under the action of its own elastic restoring force, cooperates with the air supply valve to drive the piston body to move towards the first opening.

8. The vacuuming device according to claim 2, characterized in that, A limiting part is provided on the side of the piston chamber near the motor chamber; In the first state, the limiting part is engaged with the piston body; In the second state, the limiting part is disengaged from the piston body.

9. The vacuuming device according to claim 8, characterized in that, The limiting part protrudes into the piston cavity; The piston body is provided with a snap-fit ​​part on the side away from the first opening; The snap-fit ​​portion includes a cylindrical protrusion, and the limiting portion includes a groove, through hole, or gap that can be snapped into and adapted to the cylindrical protrusion; or, the limiting portion includes a cylindrical protrusion, and the snap-fit ​​portion includes a groove, through hole, or gap that can be snapped into and adapted to the cylindrical protrusion.

10. The vacuuming device according to any one of claims 1 to 9, characterized in that, The angle between the first straight line and the second straight line is 90°.

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