Cleaning accessory of dust collector and dust collector

Abstract

The invention provides a cleaning accessory of a dust collector and the dust collector, the cleaning accessory comprises a brush head, a first water storage unit and a second water storage unit, the first water storage unit and the second water storage unit are synchronously and detachably installed in the brush head, and the first water storage unit and the second water storage unit are respectively used for storing sewage and clean water. The water storage volumes of the first water storage unit and the second water storage unit are variable, and the maximum water storage volumes of the first water storage unit and the second water storage unit are almost the same. Complementation of the clear water volume and the sewage volume is achieved by compressing and unfolding the specific water storage unit, and limit utilization of the internal space of the cleaning accessory is achieved. And the maximum volumes of the two water storage units are basically consistent, so that the synchronous prompt that the clear water is used up and the sewage is to be full is realized. The clean water consumption is approximately equal to the increased weight of the sewage, so that the overall gravity center of the cleaning accessory is kept stable, the uniformity of cleaning pressure is ensured, the control hand feeling is improved, and convenience is provided for optimization of the internal structure of the cleaning accessory.

Description

Technical Field

[0001] This invention belongs to the field of cleaning equipment technology, specifically relating to a cleaning accessory for a vacuum cleaner and a vacuum cleaner. Background Technology

[0002] Current vacuum cleaners typically use separate wastewater and clean water tanks for floor cleaning. During cleaning, the clean water in the clean water tank is continuously consumed, leaving empty space. At the same time, wastewater is recycled to the wastewater tank, causing its empty space to gradually decrease. The empty spaces in the wastewater and clean water tanks cannot be compensated for, resulting in low space utilization within the cleaning attachment. This makes it difficult to reduce the size of the cleaning attachment, and users need to frequently add clean water and clean the wastewater, making the cleaning process time-consuming and laborious.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a cleaning accessory for a vacuum cleaner that solves the problem that the volumes of the wastewater tank and the clean water tank in existing cleaning accessories cannot be complementary.

[0005] To achieve the above objectives, a specific embodiment of the present invention provides a cleaning accessory for a vacuum cleaner. The cleaning accessory includes a brush head and a first water storage unit and a second water storage unit that are detachably installed in the brush head. One of the first water storage unit and the second water storage unit is used to store wastewater and is connected to the negative pressure port of the brush head, while the other is used to store clean water and is connected to the water spray nozzle on the front side of the brush head. The water storage capacity of the first water storage unit and the second water storage unit is variable, and their maximum water storage capacity is nearly the same.

[0006] In one or more embodiments of the present invention, the water storage volume change curves of the first water storage unit and the second water storage unit show opposite trends.

[0007] In one or more embodiments of the present invention, the brush head is provided with a receiving space for accommodating a first water storage unit and a second water storage unit, wherein the first water storage unit and the second water storage unit are independently disposed in the receiving space, or one of them is disposed in the receiving space and accommodates the other.

[0008] In one or more embodiments of the present invention, a second water storage unit is housed inside a first water storage unit, and the cleaning accessory further includes a drive component for causing the second water storage unit to deform.

[0009] In one or more embodiments of the present invention, the driving component includes a driving member located inside a first water storage unit and outside a second water storage unit. The driving member is connected to the second water storage unit and can be controllably reciprocated along a preset direction to cause the second water storage unit to deform along the preset direction.

[0010] In one or more embodiments of the present invention, the second water storage unit includes a first outer surface and a second outer surface disposed opposite to each other, the first outer surface being connected to a driving member, and the second outer surface being connected to the inner surface of the first water storage unit.

[0011] In one or more embodiments of the present invention, the first water storage unit is used to store sewage, and the second water storage unit is used to store clean water; the cleaning accessory also includes a liquid level sensor for detecting the liquid level inside the second water storage unit, and a controller for controlling the displacement of the drive component, the controller being used to control the drive component to move to compress the second water storage unit when the liquid level in the second water storage unit is less than a preset liquid level threshold.

[0012] In one or more embodiments of the present invention, during the compression of the second water storage unit, the liquid level in the second water storage unit is maintained between a and b; wherein a = 0.9 * preset liquid level threshold, and b = 1.1 * preset liquid level threshold.

[0013] In one or more embodiments of the present invention, the ratio of the preset liquid level threshold to the height of the internal space of the second water storage unit is between 0.75 and 0.9.

[0014] In one or more embodiments of the present invention, the ratio of the maximum water storage volume of the first water storage unit to the volume of the internal cavity of the first water storage unit is between 0.75 and 0.9.

[0015] In one or more embodiments of the present invention, the ratio of the minimum water storage volume of the first water storage unit to the volume of the internal cavity of the first water storage unit is between 0.1 and 0.25.

[0016] In one or more embodiments of the present invention, the ratio of the maximum water storage volume of the second water storage unit to the volume of the internal cavity of the first water storage unit is between 0.75 and 0.9.

[0017] In one or more embodiments of the present invention, the ratio of the minimum water storage volume of the second water storage unit to the volume of the internal cavity of the first water storage unit is between 0.1 and 0.25.

[0018] In one or more embodiments of the present invention, the cleaning accessory further includes a pressure regulator for adjusting the internal air pressure of the first water storage unit and / or the second water storage unit, which can deform under the action of the internal air pressure difference between the first water storage unit and the second water storage unit.

[0019] On the other hand, one specific embodiment of the present invention provides a vacuum cleaner that includes the above-mentioned cleaning accessories.

[0020] Compared with existing technologies, this invention achieves complementarity between clean water volume and wastewater volume by compressing and expanding specific water storage units, realizing the maximum utilization of the internal space of the cleaning attachment, so that the cleaning attachment can provide a larger clean water storage and wastewater collection capacity in a compact structure.

[0021] Furthermore, the maximum volume of the two water storage units is basically the same, enabling simultaneous alerts when the clean water is depleted and the sewage is about to fill.

[0022] In addition, during the cleaning process, the consumption of clean water is approximately equal to the increase in weight of the wastewater, which keeps the overall center of gravity of the cleaning attachment stable. This not only ensures the uniformity of cleaning pressure but also improves the handling feel and facilitates the optimization of the internal structure of the cleaning attachment. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the cleaning accessory in Embodiment 1 of the present invention;

[0025] Figure 2 This is an exploded view of the cleaning accessory in Embodiment 1 of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the first water storage unit, the second water storage unit, and the drive assembly in Embodiment 1 of the present invention;

[0027] Figure 4 This is a schematic diagram of the second water storage unit in the deployed state in Embodiment 1 of the present invention;

[0028] Figure 5 This is a schematic diagram of the second water storage unit in a compressed state in Embodiment 1 of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the first water storage unit and the second water storage unit in one state in Embodiment 3 of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the first water storage unit and the second water storage unit in another state in Embodiment 3 of the present invention.

[0031] Key reference numerals in the attached drawings: 1. Brush head; 2. First water storage unit; 3. Second water storage unit; 4. Motor; 5. Lead screw; 6. Drive component. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0033] In the description of this invention, it should be understood that the terms "top", "bottom", "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Furthermore, the term "first" is used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] To address the technical problem that the available volumes of the wastewater tank and clean water tank in cleaning accessories cannot be complementary, the conventional improvement approach is to install a movable volume adjustment structure (such as a partition) inside a water tank. This structure divides the internal space of the water tank into two parts: one part serves as a clean water tank to store clean water, and the other part serves as a wastewater tank to store wastewater. When the user moves the volume adjustment structure, the volumes of the clean water tank and the wastewater tank can be changed simultaneously, thus achieving complementarity between the two tanks.

[0036] However, the above-mentioned improved design has many problems, which makes it practically impossible to apply it to the field of vacuum cleaners.

[0037] First, to prevent sewage from leaking into the clean water tank, the above-mentioned improved design has extremely strict requirements for sealing. Sealing structures such as sealing rings need to be set around the volume adjustment structure to completely separate the clean water tank and the sewage tank. This results in a large static friction around the volume adjustment structure, making it very difficult to move the volume adjustment structure.

[0038] Secondly, the volume adjustment structure is relatively thin. When moving the volume adjustment structure, force needs to be applied to it. Whether the user moves the volume adjustment structure manually or automatically using the drive mechanism, force needs to be applied to specific areas of the volume adjustment structure frequently, which makes the volume adjustment structure prone to deformation, and in severe cases, even cracking. This leads to the need for the user to replace the volume adjustment structure frequently. After replacing the volume adjustment structure, it is necessary to reseal it, resulting in a very poor user experience.

[0039] Furthermore, the wastewater tank and the clean water tank share a space. If the wastewater tank is not thoroughly cleaned after the last cleaning task, the uncleaned area may be used as the clean water tank during the next cleaning task, making the clean water in the clean water tank susceptible to contamination. Also, if the wastewater tank is not thoroughly cleaned, solid or fibrous debris may remain inside.

[0040] Furthermore, the volume of the wastewater tank is generally larger than that of the clean water tank when cleaning is completed. If the wastewater tank is not thoroughly cleaned during the wastewater removal process, solid or fibrous debris may remain inside. During the next cleaning cycle, it is often necessary to move the volume adjustment mechanism to reduce the volume of the wastewater tank and increase the volume of the clean water tank. During this process, the volume adjustment mechanism is highly susceptible to interference with any remaining solid or fibrous debris in the wastewater tank. This debris can easily become trapped between the volume adjustment mechanism and the inner surface of the tank, increasing the frictional resistance of the moving mechanism and, in severe cases, even causing it to jam.

[0041] For the reasons mentioned above, the improved design cannot currently be practically applied to cleaning attachments for vacuum cleaners. Therefore, this application adopts a completely new approach to provide a cleaning attachment for vacuum cleaners. This attachment not only allows for free adjustment of the water storage capacity of its wastewater tank and clean water tank, but also completely isolates the wastewater tank from the clean water tank, eliminating the need for extremely strict sealing of the wastewater and clean water tanks and eliminating concerns about the failure of the volume adjustment structure during cleaning.

[0042] The following is a detailed description of the structure of the cleaning attachment for the improved vacuum cleaner in this application.

[0043] Example 1

[0044] Reference Figures 1 to 3As shown, this embodiment provides a cleaning accessory for a vacuum cleaner. The accessory includes a brush head 1, a first water storage unit 2, and a second water storage unit 3. The brush head 1 has a receiving space, and the first water storage unit 2 is detachably installed within this space. The second water storage unit 3 is housed within the first water storage unit 2. When the first water storage unit 2 is removed from the brush head 1, the second water storage unit 3 can be removed simultaneously. The internal space of the first water storage unit 2 communicates with the negative pressure port of the brush head 1, and serves as a wastewater tank to receive wastewater. The internal space of the second water storage unit 3 communicates with the water spray nozzle on the front side of the brush head 1, and serves as a clean water tank to store clean water supplied to cleaning components (such as the roller brush of the brush head 1). The first water storage unit 2 is typically made of a rigid material, and its shape is relatively stable, making it less prone to significant deformation. The second water storage unit 3 is typically made of elastic or flexible materials, such as rubber, silicone, or polyethylene. Under external force, the second water storage unit 3 can deform significantly, thereby compressing or expanding itself and increasing its water storage volume, which in turn changes the water storage volume of the first water storage unit 2. It is understood that in this embodiment, the water storage volume of the first water storage unit 2 refers to the volume of the space enclosed between the inner surface of the first water storage unit 2 and the outer surface of the second water storage unit 3, and not to the inherent volume of the first water storage unit 2 (i.e., the volume of the space enclosed by the inner surface of the first water storage unit 2). The water storage volume of the second water storage unit 3 refers to the volume of the space enclosed by its inner surface.

[0045] Furthermore, the second water storage unit 3 can undergo significant deformation, exhibiting extremely strong deformation capabilities. (Refer to...) Figure 4 As shown, before cleaning begins, the second water storage unit 3 is typically expanded to its maximum volume to store more clean water, at which point it occupies most of the internal space of the first water storage unit 2. During cleaning, as the clean water is continuously consumed, excess water storage capacity appears in the second water storage unit 3. At this point, the second water storage unit 3 is continuously compressed, reducing its overall volume and the space it occupies. This allows the water storage capacity of the first water storage unit 2 to increase simultaneously, effectively replenishing the excess water storage capacity of the second water storage unit 3 to the first water storage unit 2. Considering that the deformable wall of the second water storage unit 3 occupies some space, and that the first water storage unit 2 typically houses other components (such as filters and sensors), the maximum water storage capacity of the second water storage unit 3 will still be less than the volume of the internal cavity of the first water storage unit 2. Therefore, under normal circumstances, the ratio of the maximum water storage capacity of the second water storage unit 3 to the volume of the internal cavity of the first water storage unit 2 is usually between 0.75 and 0.9.

[0046] Reference Figure 5As shown, when the clean water in the second water storage unit 3 is basically consumed, the second water storage unit 3 is compressed to its minimum volume. The second water storage unit 3 occupies only a small portion of the internal space of the first water storage unit 2, and the water storage volume of the first water storage unit 2 reaches its maximum. Furthermore, the wastewater also essentially fills the remaining space within the first water storage unit 2. Considering that the deformable wall of the second water storage unit 3 occupies some space, other components (such as filter components, sensors, etc.) are generally also installed inside the first water storage unit 2. The ratio of the minimum water storage volume of the second water storage unit 3 to the volume of the internal cavity of the first water storage unit 2 is typically between 0.1 and 0.25.

[0047] Similarly, since the water storage volumes of the first water storage unit 2 and the second water storage unit 3 change synchronously and are complementary, the sum of their water storage volumes is essentially equal to the volume of the internal cavity of the first water storage unit 2. Therefore, when the water storage volume of the second water storage unit 3 reaches its maximum, the water storage volume of the first water storage unit 2 reaches its minimum, and the ratio of the minimum water storage volume of the first water storage unit 2 to the volume of the internal cavity of the first water storage unit 2 is usually between 0.1 and 0.25. When the water storage volume of the second water storage unit 3 reaches its minimum, the water storage volume of the first water storage unit 2 reaches its maximum, and the ratio of the maximum water storage volume of the first water storage unit 2 to the volume of the internal cavity of the first water storage unit 2 is usually between 0.75 and 0.9.

[0048] As can be seen from the above scheme, the water storage capacity change curves of the first water storage unit 2 and the second water storage unit 3 show opposite trends (i.e., the water storage capacity of one increases while the water storage capacity of the other decreases; the water storage capacity of one decreases while the water storage capacity of the other increases), and the maximum water storage capacity of the two is basically the same. This means that no matter what stage the cleaning work is in (e.g., the clean water is about to run out or the sewage is about to fill up), the water storage capacity of the entire brush head 1 can be almost fully utilized, avoiding the waste of internal space caused by one unit having too large a water storage capacity and the other unit having too small a water storage capacity. This allows the brush head 1 to adopt a more compact structural design, or to have a larger clean water storage capacity and sewage storage capacity under the same brush head 1 size.

[0049] Secondly, the maximum water storage capacity of the first water storage unit 2 and the second water storage unit 3 is basically the same, giving users an intuitive expectation that "one tank of clean water can roughly be converted into one tank of sewage." Ideally, when the clean water is exhausted, the sewage tank will also be full, providing users with a synchronized and clear operation prompt. This facilitates users to perform sewage cleaning and clean water replenishment operations in a unified manner, reducing the frequency of user operations and improving the user experience.

[0050] In addition, during cleaning operations, the fresh water supply rate and the wastewater recovery rate need to be roughly balanced. The maximum volumes of the two water storage units are matched, and the cleaning accessories can support more continuous and uninterrupted cleaning operations, reducing the interruption of cleaning work caused by premature overflow or emptying of one water storage unit, thereby ensuring the stability of cleaning efficiency and cleaning effect.

[0051] Furthermore, during the cleaning process, the clean water in the second water storage unit 3 is continuously consumed, reducing its weight, while the wastewater in the first water storage unit 2 continuously increases, increasing its weight. Since the first and second water storage units 2 and 3 are integrated, and the densities of the clean water and wastewater are similar, ideally, the weight loss from the clean water and the weight gain from the wastewater can achieve near-equal complementarity, preventing the cleaning attachment from being excessively heavy on one side and insufficient on the other. Throughout the cleaning process, the fluctuation in the center of gravity of the cleaning attachment is minimized, avoiding phenomena such as "front heavy, back light," "front light, back heavy," "left heavy, right light," "left light, right heavy," "top heavy, bottom light," or "top light, bottom heavy" caused by drastic local weight changes. This allows the user to maintain a relatively stable feel, easily applying uniform downward and pushing / pulling forces to the cleaning attachment, ensuring that the pressure of the cleaning attachment adhering to the ground remains consistent, thus guaranteeing the stability of the cleaning effect during the cleaning process. At the same time, the stability of the center of gravity provides a better benchmark for the structural design and motion calibration of the cleaning attachments, allowing for more precise configuration of the positions of internal components (such as motor 4 and fan), optimizing the overall layout of the cleaning attachments, and eliminating the need to reserve too much balance margin for large dynamic center of gravity shifts.

[0052] Furthermore, referring to Figure 3 As shown, in this embodiment, the cleaning accessory also includes a drive assembly, which is used to cause the second water storage unit 3 to deform. The drive assembly is typically installed inside the brush head 1. The drive assembly mainly includes a motor 4, a lead screw 5, and a drive member 6. The lead screw 5 is connected to the output end of the motor 4, and the drive member 6 is threaded onto the lead screw 5. The drive member 6 extends at least partially into the first water storage unit 2 and is located outside the second water storage unit 3, and is fixedly connected to the second water storage unit 3. When the motor 4 drives the lead screw 5 to rotate, it can drive the drive member 6 to reciprocate along a preset direction (i.e., the axial direction of the lead screw 5), changing the position of the drive member 6, thereby causing the drive member 6 to apply a corresponding force to the second water storage unit 3, so as to cause the second water storage unit 3 to deform along the preset direction.

[0053] Furthermore, to ensure that the force applied by the driving component 6 to the second water storage unit 3 can be applied efficiently and stably to the second water storage unit 3, and to ensure that the displacement of the driving component 6 is linearly related to the change in the water storage volume of the two water storage units, this embodiment optimizes the design of the force transmission path and direction. Specifically, referring to... Figure 3 As shown, the driving component 6 is connected to the first outer surface of the second water storage unit 3, while the inner surface of the first water storage unit 2 is connected to the second outer surface of the second water storage unit 3. The first and second outer surfaces of the second water storage unit 3 are positioned opposite to each other. With the above structural design, under the compression or pulling of the driving component 6, the second water storage unit 3 mainly deforms along the direction of force application, thereby effectively suppressing irregular deformation or lateral instability of the second water storage unit 3 due to the skewness of the force direction.

[0054] Furthermore, in order to facilitate cleaning of the first water storage unit 2 and the second water storage unit 3, the first water storage unit 2 and the second water storage unit 3, and the second water storage unit 3 and the driving component 6 are usually connected by a detachable method, such as snap-fit, pin connection, magnetic connection and other common connection methods.

[0055] As an example, a slot can be provided on the inner surface of the first water storage unit 2, while an elastic buckle that cooperates with the slot can be provided on the second outer surface of the second water storage unit 3. When it is necessary to assemble the two, pressing or rotating can engage the elastic buckle with the slot, thus achieving a secure connection between the two. When it is necessary to clean the sewage, the first water storage unit 2 and the second water storage unit 3 can be easily separated by a trigger release mechanism between the elastic buckle and the slot. Similarly, a similar quick-release snap-fit ​​structure can also be used between the drive component 6 and the second water storage unit 3.

[0056] Furthermore, to achieve automated and intelligent adjustment of the water storage volume during the cleaning attachment's operation, the cleaning attachment in this embodiment also integrates a control unit. Specifically, the control unit includes a liquid level sensor and a controller. The liquid level sensor is typically located inside the second water storage unit 3, and its detection end is configured to directly or indirectly detect the liquid level height inside the second water storage unit 3. The controller, as the control center, is mainly electrically connected to the liquid level sensor and the motor 4 of the drive assembly, used to receive detection signals and issue control commands.

[0057] Based on the above structure, the automatic control logic of this embodiment operates as follows:

[0058] Before the cleaning accessories begin cleaning, the second water storage unit 3 is filled or nearly filled with clean water. During cleaning in this initial state, the clean water inside the second water storage unit 3 is continuously consumed, and its internal liquid level gradually decreases. When the liquid level sensor detects that the internal liquid level of the second water storage unit 3 has dropped to a preset threshold, it indicates that some of the clean water has been consumed, and a certain amount of empty water storage capacity has been generated inside the second water storage unit 3.

[0059] At this time, the liquid level sensor immediately sends the corresponding detection signal to the controller. After receiving the detection signal, the controller determines that the volume regulation start condition has been met and immediately generates the corresponding control command. After receiving the control command, the motor 4 control module integrated in the controller controls the motor 4 of the drive component to switch from the standby state to the start-up state based on the control command.

[0060] After the motor 4 starts, it drives the drive component 6 to move in a preset direction and at a preset speed. The drive component 6 applies a compressive force parallel to the deformation direction to the second water storage unit 3, which is gradually compressed, and its remaining water storage volume decreases accordingly. Since the volumes of the first water storage unit 2 and the second water storage unit 3 are complementary, this process can synchronously and equally increase the water storage volume of the first water storage unit 2, thereby freeing up sufficient space for the wastewater continuously generated during the continuous cleaning operation.

[0061] It can be seen that the above control logic can achieve adaptive adjustment of water storage volume. It does not immediately compress the second water storage unit 3 at the beginning of the cleaning work, nor does it passively respond after the first water storage unit 2 is almost full of sewage. Instead, it chooses to trigger the compression action at the key node when a certain amount of clean water is consumed and effective empty space is generated.

[0062] If the second water storage unit 3 is compressed immediately at the start of the cleaning process, the drive assembly and the second water storage unit 3 will be subjected to unnecessary no-load cycles, which may lead to fatigue damage, accelerated wear, and energy waste in the second water storage unit 3 and the drive assembly. Furthermore, precisely expanding the first water storage unit 2 synchronously in the early stages of sewage accumulation effectively prevents problems such as overflow, decreased suction, or cleaning interruption caused by the water storage capacity growth of the first water storage unit 2 lagging behind the sewage generation rate.

[0063] Furthermore, the ratio of the preset liquid level threshold to the height of the internal space of the second water storage unit 3 is between 0.75 and 0.9. The preset liquid level threshold is set at a relatively high level, and the core purpose of setting this value range is to achieve intelligent detection of the water consumption process and precise control of the timing of volume adjustment.

[0064] If the preset liquid level threshold is set too low (for example, the ratio of the preset liquid level threshold to the height of the internal space of the second water storage unit 3 is less than 0.75), it means that more than 25% of the total capacity of clean water needs to be consumed before volume adjustment is triggered. This may result in the initial water storage capacity of the first water storage unit 2 not being able to expand for a long time in the early stages of cleaning due to the slow consumption of clean water. When a large amount of sewage is generated in the subsequent cleaning process, the water storage capacity of the first water storage unit 2 cannot meet the needs of storing sewage. Conversely, in this embodiment, the lower limit of the preset liquid level threshold is set to 0.75, ensuring that the first water storage unit 2 can be expanded in a timely manner when clean water consumption is in the early to middle stages, providing sufficient and synchronously growing space for the smooth recycling of sewage throughout the entire cleaning cycle.

[0065] If the preset liquid level threshold is set too high (for example, the ratio of the preset liquid level threshold to the height of the internal space of the second water storage unit 3 is greater than 0.9), it means that the second water storage unit 3 will be compressed when less than 10% of the clean water is consumed. This will prolong the working time and travel of the drive components, causing unnecessary energy consumption and mechanical wear, and shortening the service life of key components. Moreover, prematurely compressing the second water storage unit 3 may unnecessarily squeeze its internal space, potentially interfering with the normal cleaning process.

[0066] Furthermore, during the compression process of the second water storage unit 3, the liquid level within it is maintained between a and b. Here, a = 0.9 * preset liquid level threshold, and b = 1.1 * preset liquid level threshold. By strictly controlling the fluctuation of the clean water level within the second water storage unit 3 within a specific range, a dynamic balance between the compression speed and clean water consumption can be achieved. This maintains stable outlet pressure, and because the clean water level is essentially constant, the flow rate and pressure of clean water supplied to the cleaning components (such as the roller brush) are more uniform, thus ensuring consistent cleaning results during the cleaning process. Moreover, it optimizes the operating conditions of the drive components, avoiding the surge in energy consumption caused by the need for high-speed operation of the motor 4 to rapidly compress the second water storage unit 3 after a significant drop in liquid level. This makes the compression process of the second water storage unit 3 smoother, more efficient, and energy-saving. Additionally, it allows the drive components to apply a relatively stable compressive force to the second water storage unit 3, ensuring its structural stability and preventing problems such as sudden stress changes and irregular internal water flow caused by drastic liquid level fluctuations.

[0067] Furthermore, the first water storage unit 2 can be inserted into the interior of the brush head 1 from the rear end of the brush head 1, and the first water storage unit 2 is connected to the brush head 1 through an opening or other structure. When it is necessary to clean sewage or add clean water, the user only needs to pull the first water storage unit 2 outward using the handle on the first water storage unit 2 to remove the first water storage unit 2 and the second water storage unit 3 from the brush head 1.

[0068] Example 2

[0069] This embodiment provides a cleaning attachment for a vacuum cleaner. The difference between this embodiment and Embodiment 1 is that the first water storage unit 2 in this embodiment is used as a clean water tank, and the second water storage unit 3 is used as a wastewater tank. Before the cleaning work begins, the second water storage unit 3 is in a compressed state and is compressed to its smallest possible volume.

[0070] Furthermore, the control logic for determining the timing of deploying the second water storage unit 3 during the cleaning process can be simplified by referring to Embodiment 1. For example, the second water storage unit 3 can be deployed only after the liquid level inside the first water storage unit 2 drops to a certain threshold (i.e., after a certain amount of clean water has been consumed).

[0071] Example 3

[0072] Reference Figure 6 and Figure 7 As shown, this embodiment provides a cleaning accessory for a vacuum cleaner. The difference between this embodiment and Embodiment 1 is that the first water storage unit 2 and the second water storage unit 3 are not installed together, but are independently installed in the receiving space of the brush head 1. The first water storage unit 2 is used to store wastewater, and the second water storage unit 3 is used to store clean water. Both the first water storage unit 2 and the second water storage unit 3 are made of elastic or flexible materials, and both can deform under external force to adjust their water storage volume.

[0073] Before the cleaning process begins, the first water storage unit 2 is almost completely folded, while the second water storage unit 3 is filled with water and almost fully extended. During the cleaning process, as the water is continuously consumed, the second water storage unit 3 is continuously compressed, while the first water storage unit 2 expands simultaneously, achieving volume complementarity.

[0074] Furthermore, the driving component 6 of the driving assembly can be connected to the first water storage unit 2 and the second water storage unit 3 simultaneously, so as to drive the first water storage unit 2 and the second water storage unit 3 to deform synchronously.

[0075] Example 4

[0076] This embodiment provides a cleaning attachment for a vacuum cleaner. The difference between this embodiment and embodiments 1 and 2 is that the cleaning attachment in this embodiment includes an air pressure regulator for adjusting the internal air pressure of the first water storage unit 2 or the second water storage unit 3. The cleaning attachment in this embodiment does not have a drive component to cause the second water storage unit 3 to deform, but uses the air pressure difference to cause the second water storage unit 3 to deform.

[0077] Taking the second water storage unit 3 as an example, before the cleaning work begins, the second water storage unit 3 is filled with water and is basically in a fully expanded state. During the cleaning process, as the water is continuously consumed, the air pressure regulator increases the air pressure in the first water storage unit 2 or decreases the air pressure in the second water storage unit 3. Under the influence of the air pressure difference between the first and second water storage units 2, the second water storage unit 3 begins to be gradually compressed, achieving volume complementarity. When the water in the second water storage unit 3 is basically consumed, the second water storage unit 3 is also basically in a fully compressed state.

[0078] Taking the second water storage unit 3 storing sewage as an example, before the cleaning work begins, the second water storage unit 3 is basically in a fully folded state. During the cleaning process, as sewage is continuously generated, the air pressure regulator is controlled to decrease the air pressure in the first water storage unit 2 or increase the air pressure in the second water storage unit 3. Under the influence of the internal air pressure difference between the first water storage unit 2 and the second water storage unit 3, the second water storage unit 3 gradually unfolds, achieving volume complementarity. When the second water storage unit 3 is full of sewage, the second water storage unit 3 is also basically in a fully unfolded state.

[0079] Furthermore, in order to ensure the stability and accuracy of the air pressure regulation process, corresponding pressure sensors can be installed in the first water storage unit 2 and the second water storage unit 3 to detect the air pressure inside the first water storage unit 2 and the second water storage unit 3 in real time. Based on the precise control of the air pressure difference between the first water storage unit 2 and the second water storage unit 3, the deformation of the second water storage unit 3 can be precisely controlled.

[0080] Furthermore, in order to ensure that the first water storage unit 2 and the second water storage unit 3 can be installed into the brush head 1 relatively smoothly and removed from the brush head 1 relatively smoothly, the first water storage unit 2 and the second water storage unit 3 can be installed together on a rigid component (e.g., a rigid housing) and then installed into the brush head 1 together with the rigid component.

[0081] Example 5

[0082] This embodiment provides a cleaning attachment for a vacuum cleaner. The difference between this embodiment and embodiment 3 is that the cleaning attachment in this embodiment includes an air pressure regulator for adjusting the internal air pressure of the first water storage unit 2 and the second water storage unit 3. The cleaning attachment in this embodiment does not have a drive component to cause the second water storage unit 3 to deform. Instead, it uses the air pressure difference to cause the first water storage unit 2 and the second water storage unit 3 to deform synchronously.

[0083] The specific working principle of the cleaning accessories in this embodiment can be referred to in Embodiment 4, and will not be repeated here.

[0084] Example 6

[0085] This embodiment provides a cleaning accessory for a vacuum cleaner. The difference between this embodiment and embodiments 1 and 2 is that the structure of the drive component in this embodiment is different from that in embodiments 1 and 2. The drive component in this embodiment adopts common linear drive elements such as multi-stage electric telescopic rods.

[0086] Example 7

[0087] This embodiment provides a vacuum cleaner, which includes the cleaning accessories in any of the above embodiments and the necessary components of a vacuum cleaner (such as a negative pressure generator, an air duct system, etc.).

[0088] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0089] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cleaning attachment for a vacuum cleaner, characterized in that, The cleaning accessory includes a brush head and a first water storage unit and a second water storage unit that are detachably installed in the brush head. One of the first water storage unit and the second water storage unit is used to store wastewater and is connected to the negative pressure port of the brush head, while the other is used to store clean water and is connected to the spray nozzle on the front side of the brush head. The water storage capacity of the first water storage unit and the second water storage unit is variable, and their maximum water storage capacity is nearly the same.

2. The cleaning accessory according to claim 1, characterized in that, The water storage volume change curves of the first water storage unit and the second water storage unit show opposite trends.

3. The cleaning accessory according to claim 1 or 2, characterized in that, The brush head has a receiving space for accommodating the first water storage unit and the second water storage unit. The first water storage unit and the second water storage unit are independently located in the receiving space, or one of them is located in the receiving space and accommodates the other.

4. The cleaning accessory according to claim 1, characterized in that, The second water storage unit is housed inside the first water storage unit, and the cleaning accessory also includes a drive component for causing the second water storage unit to deform.

5. The cleaning accessory according to claim 4, characterized in that, The driving component includes a driving member located inside the first water storage unit and outside the second water storage unit. The driving member is connected to the second water storage unit and can be controllably moved back and forth in a preset direction to cause the second water storage unit to deform in the preset direction.

6. The cleaning accessory according to claim 5, characterized in that, The second water storage unit includes a first outer surface and a second outer surface arranged opposite to each other. The first outer surface is connected to the driving member, and the second outer surface is connected to the inner surface of the first water storage unit.

7. The cleaning accessory according to claim 5, characterized in that, The first water storage unit is used to store sewage, and the second water storage unit is used to store clean water; The cleaning accessory also includes a liquid level sensor for detecting the liquid level inside the second water storage unit, and a controller for controlling the displacement of the drive component. The controller is used to control the drive component to move to compress the second water storage unit when the liquid level in the second water storage unit is less than a preset liquid level threshold.

8. The cleaning accessory according to claim 7, characterized in that, During the compression process of the second water storage unit, the liquid level inside the second water storage unit remains between a and b; Where a = 0.9 * preset liquid level threshold, b = 1.1 * preset liquid level threshold.

9. The cleaning accessory according to claim 7 or 8, characterized in that, The ratio of the preset liquid level threshold to the height of the internal space of the second water storage unit is between 0.75 and 0.

9.

10. The cleaning accessory according to claim 1, 2, 4, 5, 7 or 8, characterized in that, The ratio of the maximum water storage volume of the first water storage unit to the volume of the internal cavity of the first water storage unit is between 0.75 and 0.9; and / or, The ratio of the minimum water storage volume of the first water storage unit to the volume of the internal cavity of the first water storage unit is between 0.1 and 0.25; and / or, The ratio of the maximum water storage volume of the second water storage unit to the volume of the internal cavity of the first water storage unit is between 0.75 and 0.9; and / or, The ratio of the minimum water storage volume of the second water storage unit to the volume of the internal cavity of the first water storage unit is between 0.1 and 0.

25.

11. The cleaning accessory according to claim 1 or 2, characterized in that, The cleaning accessory also includes a pressure regulator for adjusting the internal air pressure of the first water storage unit and / or the second water storage unit, which can deform under the action of the internal air pressure difference between the first water storage unit and the second water storage unit.

12. A vacuum cleaner, characterized in that, The vacuum cleaner includes the cleaning accessories as described in any one of claims 1 to 11.

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