Patent Description:
After mopping the floor, there is usually residual water on the ground, which can cause the floor to be slippery and lead to accidents. Additionally, the trampling before the ground is dry is easy to leave water stains with footprints. Traditional cleaning devices use a scraper, a sponge, or a cloth that can absorb water to wipe the floor, but the floor may remain slippery for a long time.

<CIT> discloses a multifunctional surface cleaning machine comprising a machine body with a positioning part and a ground brush. The positioning part protrudes outwards from the machine body and the machine body is provided with a suction source assembly. The bottom wall of an air direction conversion cavity is provided with an air vent communicating with a sewage containing barrel.

<CIT> pertains to a motor fan built in a lower part of cleaner body and producing suction airflow. A first flow path is provided to cleaner body and communicates with a suction tool and a dust collection section. A second flow path is provided to the cleaner body and communicates with the dust collection section and a suction side of the motor fan. The second flow path is formed over substantially the entire length of the cleaner body in a longitudinal direction.

<CIT> discloses a vacuum cleaner including a cleaner body; a cover member installed at an upper portion of the cleaner body to be opened and closed and configured to form a part of a front surface and an upper surface of the cleaner body; a suction hose provided at a front surface of the cover member; a hole formed at the front surface of the cover member to be in communication with the suction hose; and an outlet port formed at a rear surface of the cleaner body to be located at a position lower than the hole, wherein air introduced through the hole is discharged to the outlet port via an inside of the cleaner body.

<CIT> discloses a vacuum cleaner with a handle assembly drivingly connected to the surface cleaning head and a main power control and a brush control controllingly coupled to the brush motor is provided on the handle assembly.

It may be beneficial to provide a ground cleaning device that can quickly dry the wet and slippery floor (e.g., after traditional cleaning devices are used).

A ground cleaning device may comprise a ground brush assembly, a main body, a fan assembly, and a switching mechanism. The ground brush assembly may be connected to the main body and may comprise a suction port. The fan assembly may be located on the main body and may comprise an air inlet and an air outlet. The main body may comprise a main air outlet channel, a front air outlet channel, and a rear air outlet channel. The suction port may be connected to the air inlet. One end of the main air outlet channel may be connected to the air outlet, and the other end of the main air outlet channel may be equipped with the switching mechanism. The switching mechanism may comprise a first state and a second state. When the switching mechanism is in the first state, the switching mechanism may close the rear air outlet channel to isolate the main air outlet channel from the rear air outlet channel. When the switching mechanism is in the second state, the switching mechanism may open the rear air outlet channel to connect the main air outlet channel with the rear air outlet channel. The rear air outlet channel may be used to direct the airflow to the cleaning surface, and the front air outlet channel may be used to direct the airflow to the front of the ground cleaning device.

The ground cleaning device may further comprise a recovery box located on the main body. The recovery box may comprise a recovery channel, and the suction port may be connected to the air inlet through the recovery channel. The main air outlet channel and the front air outlet channel may be separated by the recovery box and the main body.

The main air outlet channel may extend from top to bottom along the height direction of the main body. The outlet of the main air outlet channel may be vertically opposite to the inlet of the rear air outlet channel, and the front air outlet channel may extend in the direction of the ground cleaning device.

The main air outlet channel may comprise at least two outlets, and the front air outlet channel and the rear air outlet channel may each have at least two outlets.

The ground cleaning device may further comprise a bent pipe. One end of the bent pipe may be connected to the main body, and the other end of the bent pipe may be connected to the floor brush component. The bent pipe may be used to connect the suction port and the recovery channel. The recovery box may be detachably connected to the main body.

The fan assembly may be detachably connected to the main body, and the air inlet and the air outlet may be both located on the side of the fan assembly close to the ground brush assembly.

The fan assembly may comprise a fan body and an air outlet shell. The fan body may be located inside the air outlet shell, and the air inlet and the air outlet may be both located at the bottom of the air outlet shell. The air inlet and the air outlet may be arranged along the direction of the ground cleaning device, and the air inlet may be located in front of the air outlet.

The switching mechanism may comprise a switching cover that is movably connected to the main body and can move relative to the main body between the first state and the second state. The switching mechanism may further comprise a pivot and a lever. The switching cover may be rotatably connected to the main body through the pivot, and one end of the lever may be fixed to the pivot, and the other end of the lever may extend out of the main body. The switching mechanism may further comprise a driving member, which is connected to the switching cover for driving the switching cover to move relative to the main body.

The main body may be provided with (e.g., comprise, connected to) a first sensing switch, and when the switching mechanism is in the first state, the switching cover can contact the first sensing switch. The main body may be provided with a second sensing switch, and when the switching mechanism is in the second state, the switching cover can contact the second sensing switch.

The ground cleaning device may further comprise a controller, which is connected to the driving member. The controller may be configured to control the driving member to drive the switching cover to move according to the received instructions of front or rear air outlet (e.g., based on a user instruction). When the controller receives a sensing signal sent by the first sensing switch or the second sensing switch, the controller controls the driving member to stop running.

When an operating current of the driving member is greater than or equal to the preset current and the controller receives a sensing signal sent by the first sensing switch or the second sensing switch, the driving member may continue running for T1 seconds before stopping. When the operating current of the driving member is greater than or equal to the preset current and the controller receives a sensing signal from the first or second induction switch, the controller may control the driving member to stop running. When the operating current of the driving member is greater than or equal to the preset current and the controller does not receive an induction signal sent by the first sensing switch or the second sensing switch, the controller may control the driving member to continue running for T2 seconds, and if the controller still does not receive a sensing signal sent by the first sensing switch or the second sensing switch (e.g., after T2 seconds), the controller may control the driving member to stop running. The controller may control the driving member to drive the switching cover to move for T3 seconds according to the received instructions of front or rear air outlet. When the operating current of the driving member is greater than or equal to the preset current, the controller may control the driving member to stop running. When the operating current of the driving member is less than the preset current, the controller may control the driving member to continue running for T4 seconds, and if the operating current of the driving member is still less than the preset current, the controller may control the driving member to stop running.

The ground cleaning device may such in air through the suction port, and the air may flow into the fan assembly through the inlet port, then blow out through the outlet port of the fan assembly, and then enter the main outlet channel. When the floor is wet and slippery, the switching mechanism may switch to the second state (e.g., based on a user instruction), and the main outlet channel may be connected to the rear outlet channel, so that the fan assembly blows air towards the rear lower side of the main body, which can quickly dry the wet and slippery cleaning surface. At other times, the switching mechanism can be switched to the first state to isolate the main outlet channel from the rear outlet channel. The main outlet channel may be connected to the front outlet channel, and the airflow is directed towards the front of the floor cleaning device, so that the fan blows towards the front side of the main body, avoiding the air blowing directly to the user, while reducing the wind noise heard by the user and improving the user's experience.

In order to make the above objects, features, and advantages of the present disclosure more apparent and understandable, specific examples of the present disclosure will be described in detail below in conjunction with the accompanying drawings. Many specific details are described below to fully understand the present disclosure. However, the present disclosure can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present disclosure, so the present disclosure is not limited to the specific examples disclosed below.

In the description of the present disclosure, it should be understood that the terms "center," "longitudinal. " "horizontal. " "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise. " "axial," "radial," "circumferential," and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure.

In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implying the number of technical features indicated. Therefore, features limited by "first" and "second" may include at least one such feature, either explicitly or implicitly. The meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

Unless otherwise specifically provided or limited, terms such as "installation," "connection. " "linkage," and "fixation" should be broadly understood, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be a communication between two components or a mutual interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to specific circumstances.

Unless otherwise specifically provided or limited, the first feature "on" or "under" the second feature can be the first and second features in direct contact or indirectly in contact through an intermediate medium.

Moreover, the first feature "above," "on top of," and "on" the second feature can be the first feature directly above or diagonally above the second feature, or only indicate that the first feature is at a higher horizontal height than the second feature. The first feature "below," "under," and "underneath" the second feature can be the first feature directly below or diagonally below the second feature, or only indicate that the first feature is at a lower horizontal height than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical,", "horizontal," "up," "down,", "left," "right," and similar expressions used in this disclosure are for illustrative purposes only.

Referring to <FIG>, <FIG>, <FIG>, <FIG>, and <FIG>, the present application describes a floor cleaning device (e.g., a ground cleaning device). The floor cleaning device may comprise a brush assembly <NUM>, a main body <NUM>, and a fan assembly <NUM>. The fan assembly <NUM> may be disposed on the main body <NUM> and comprise an air inlet <NUM> and an air outlet <NUM>. The brush assembly <NUM> may be connected to the main body <NUM> and comprise a suction port <NUM>. Any suitable handle may be used to facilitate the movement of the floor cleaning device. The main body <NUM> may have a main air outlet channel <NUM> (e.g., an exhaust duct), a front air outlet channel <NUM>, and a rear air outlet channel <NUM>. The suction port <NUM> may be connected to the air inlet <NUM>. One end (e.g., a first end) of the main air outlet channel <NUM> may be connected to the air outlet <NUM>, and the other end (e.g., a second end) of the main air outlet channel <NUM> may be provided with (e.g., connected to) a switching mechanism <NUM> (e.g., a switching device). The switching mechanism <NUM> may be configured to control (e.g., switch) the direction of the airflow in the main air outlet channel <NUM>.

The switching mechanism <NUM> may have a first state and a second state. In the first state, the switching mechanism <NUM> may close the rear air outlet channel <NUM> to isolate the main air outlet channel <NUM> from the rear air outlet channel <NUM>, and the other end of the main air outlet channel <NUM> may be connected to the front air outlet channel <NUM>, directing the airflow to the front of the floor cleaning device, so that the fan assembly <NUM> blows air towards the front of the main body <NUM>. In the second state, the switching mechanism <NUM> may open the rear air outlet channel <NUM>, and the other end of the main air outlet channel <NUM> may be connected to the rear air outlet channel <NUM>, directing the airflow to the cleaning surface, so that the fan assembly <NUM> blows air towards the lower rear of the main body <NUM>.

In the second state, the main air outlet channel <NUM> and the front air outlet channel <NUM> may be kept connected or closed. By arranging the directions of the main air outlet channel <NUM>, the front air outlet channel <NUM>, and the rear air outlet channel <NUM>, the airflow of the main air outlet channel <NUM> may be directed entirely to the rear air outlet channel <NUM>, or partially to the rear air outlet channel <NUM> and partially to the front air outlet channel <NUM>. In the second state, the main air outlet channel <NUM>, the rear air outlet channel <NUM>, and the front air outlet channel <NUM> may be all connected, and the airflow of the main air outlet channel <NUM> may be directed entirely to the rear air outlet channel <NUM>. The direction of the arrow in <FIG> indicates that the airflow in the floor cleaning device may have two switchable flow directions, and the directions of the arrows in <FIG> and <FIG> indicate the directions of the airflows in different actual use scenarios.

After the fan assembly <NUM> is started, air may be sucked in through the suction port <NUM>, and may continue to flow through the air inlet <NUM> into the interior of the fan assembly <NUM>. The air may then be blown out through the air outlet <NUM>, and enter the main air outlet channel <NUM>. When the floor is wet and slippery, the switching mechanism <NUM> may switch to the second state, and the other end of the main air outlet channel <NUM> may be connected to the rear air outlet channel <NUM>, so that the fan assembly <NUM> blows air towards the lower rear of the main body <NUM>, which can quickly dry the wet and slippery cleaning surface. In an example, at other times, the switching mechanism <NUM> can be switched to the first state to isolate the main air outlet channel from the rear air outlet channel, and the other end of the main air outlet channel <NUM> is only connected to the front air outlet channel <NUM>, directing the airflow to the front of the floor cleaning device, so that the fan assembly <NUM> blows air towards the front of the main body <NUM>, avoiding the wind blowing directly to the user, while reducing the noise of the wind heard by the user and improving the user's experience.

The front and rear sides may be determined with reference to the direction of movement of the floor cleaning device during use. A user may stand at the rear of the floor cleaning device to operate it, and the brush assembly <NUM> may move close to the ground to clean the floor.

Furthermore, the floor cleaning device may comprise a bent pipe <NUM> or a tube with similar or different shape. One end (e.g., a first end) of the bent pipe <NUM> may be connected to the main body <NUM> and the other end (e.g., a second end) of the bent pipe <NUM> may be connected to the brush assembly <NUM>. Referring to <FIG>, the brush assembly <NUM> may comprise a cleaning member <NUM> and a connecting member <NUM>, and the suction port <NUM> may be opened on the connecting member <NUM>. The cleaning member <NUM> may be installed on the connecting member <NUM>, and the connecting member <NUM> may comprise a roller. The lower end of the bent pipe <NUM> may be connected to the connecting member <NUM>, and the upper end of the bent pipe <NUM> may be connected to the main body <NUM>. The roller may roll forward, driving the connecting member <NUM>, the cleaning member <NUM>, and the main body <NUM> to move forward. During the movement, the cleaning member <NUM> may move to clean the floor, and the garbage (e.g., dust, dirt) may be lifted up to the suction port <NUM>, and the air carrying the garbage may enter the main body <NUM> through the suction port <NUM> and the bent pipe <NUM> in turn. In an example, the bent pipe <NUM> may not be provided, and the main body <NUM> may be directly connected to the brush assembly <NUM>.

The cleaning member <NUM> may comprise a brush (e.g., a columnar rolling brush), which may be kept wet during use and can be rolled and dragged on the floor during movement. The brush may roll on the front side, making the area it passes through wet and slippery. The switching mechanism <NUM> can be switched to the second state to direct the air to blow the floor through the rear air outlet channel <NUM>. When there is more dust or light garbage such as hair on the floor, the switching mechanism <NUM> can be switched to the first state to direct the air to blow the front side of the main body <NUM> through the front air outlet channel <NUM>, avoiding the garbage in the uncleaned areas on both sides of the main body <NUM> being blown away by the rear outlet and causing secondary pollution in the cleaning area. The cleaning member <NUM> can also be other structures, such as a brush with bristles that lifts the garbage and sweeps it towards the suction port <NUM> by rotating or swinging. During the cleaning process of the brush, the floor may not become wet. The switching mechanism <NUM> can be switched to the first state to direct the air to blow the front side of the main body <NUM> through the front air outlet channel <NUM>, reducing noise and avoiding the wind blowing towards the user.

The floor cleaning device may also comprise a recovery bin <NUM> (e.g., a recovery box) set on the main body <NUM>, with a recovery channel <NUM> inside. The suction port <NUM> and the air inlet <NUM> may be connected through the recovery channel <NUM>, and the recovery bin <NUM> and the main body <NUM> may be separated to form the main air outlet channel <NUM> and the front air outlet channel <NUM>. The airflow with garbage may enter through the suction port <NUM> and the garbage may be sucked into the recovery bin <NUM> via the recovery channel <NUM>. The air may continue to flow upwards under the action of the fan assembly <NUM>, enter the fan assembly <NUM> through the air inlet <NUM>, may be blown out through the air outlet <NUM> to the main air outlet channel <NUM>, and finally blown out of the main body <NUM> through the front air outlet channel <NUM> or the rear air outlet channel <NUM>.

As shown in <FIG>, in an example, the recovery bin <NUM> may be equipped with an air duct <NUM> and a deflector plate <NUM>. The air duct <NUM> may be vertically arranged, and the deflector plate <NUM> may be inclined above the air duct <NUM> and extend to the side and below the outlet of the air duct <NUM>. The deflector plate <NUM> may be spaced between the inner wall of the air duct <NUM> and the recovery bin <NUM>. The airflow passing through the bent pipe <NUM> may enter the air duct <NUM> and flow out of the outlet of the air duct <NUM>, and then flow down along the gap between the air duct <NUM> and the deflector plate <NUM> into the recovery bin <NUM>. The airflow may then flow up along the gap between the inner wall of the recovery bin <NUM> and the deflector plate <NUM>, and enter the fan assembly <NUM> through the outlet above the recovery bin <NUM> and the air inlet <NUM> of the fan assembly <NUM>. During the process of the airflow flowing around the deflector plate <NUM>, the garbage may be sucked into the recovery bin <NUM>.

As shown in <FIG>, the upper end of the bent pipe <NUM> may be provided with a first sealing ring <NUM>. The upper end of the bent pipe <NUM> may be sealed and connected to the corresponding air duct <NUM> of the recovery bin <NUM> at the lower end through the first sealing ring <NUM>. The upper end of the recovery bin <NUM> may be provided with a second sealing ring <NUM>. The upper end of the recovery bin <NUM> may be sealed and connected to the air inlet <NUM> of the corresponding fan assembly <NUM> of the main body <NUM> through the second sealing ring <NUM>, thereby forming a sealed recovery channel <NUM>. Negative pressure may be generated at the suction port <NUM>, allowing the garbage to be smoothly sucked into the recovery bin <NUM>. The first sealing ring <NUM> and the second sealing ring <NUM> can be made of airtight materials such as soft rubber and foam.

As shown in <FIG>, <FIG>, <FIG>, and <FIG>, in an example, the recovery bin <NUM> may be detachably connected to the main body <NUM>. The rear side of the recovery bin <NUM> and the front side of the main body <NUM> may be separated to form the main air outlet channel <NUM>, and the lower side of the recovery bin <NUM> and the upper side of the main body <NUM> may be separated to form the front air outlet channel <NUM>. The rear air outlet channel <NUM> may be located inside the main body <NUM>. By connecting the recovery bin <NUM> to the main body <NUM>, the main air outlet channel <NUM> and the front air outlet channel <NUM> are formed, avoiding the need for additional air ducts and reducing manufacturing costs. By detaching the recovery bin <NUM>, it is easy to clean the main air outlet channel <NUM> and the front air outlet channel <NUM>.

The brush assembly <NUM> may clean the floor and collect the dirt into the recovery bin <NUM>. The floor cleaning device may also comprise a water tank, which may be set on the main body <NUM> to provide clean water to the cleaning member <NUM> and/or floor.

As shown in <FIG>, <FIG>, <FIG>, and <FIG>, in an example, the fan assembly <NUM> may comprise a fan body <NUM> and an outlet casing <NUM>. The fan body <NUM> may be located inside the outlet casing <NUM>, and the air inlet <NUM> and the air outlet <NUM> may be arranged along the direction of forward movement of the floor cleaning device, with the air inlet <NUM> located at the front bottom of the outlet casing <NUM> and the air outlet <NUM> located at the rear bottom of the outlet casing <NUM>. The airflow may enter the fan body <NUM> through the air inlet <NUM> at the front bottom of the outlet casing <NUM>, and may be blown out of the outlet <NUM> at the rear bottom of the outlet casing <NUM>, directly flowing into the main air outlet channel <NUM> without obstruction, with low wind resistance, and effectively reducing the energy consumption of the fan body <NUM>.

The air inlet <NUM> and the air outlet <NUM> may be located on the same side of the fan assembly <NUM>, and both are located on the side of the fan assembly <NUM> close to the brush assembly <NUM>. This setting facilitates the connection of the air inlet <NUM> and the air outlet <NUM> with the relevant channels, effectively reduces the layout of pipelines, and reduces manufacturing costs.

In an example, the fan assembly <NUM> may be detachably connected to the main body <NUM>. The fan assembly <NUM> can be detached from the main body <NUM> and connected to other accessories as the power part of a handheld vacuum cleaner, improving flexibility of use.

Referring to <FIG>, <FIG>, and <FIG>, in an example, the switching mechanism <NUM> may comprise a switching cover <NUM> that is movably connected to the main body <NUM> and used to move relative to the main body <NUM> between a first state and a second state.

In an example, the switching mechanism <NUM> may further comprise a pivot shaft <NUM>, and the switching cover <NUM> is rotatably connected to the main body <NUM> via the pivot shaft <NUM>.

In an example, one end of the switching cover <NUM> may be provided with a shaft hole <NUM>, and the pivot shaft <NUM> may be inserted through the shaft hole <NUM>. The two sides of the main air outlet channel <NUM> may be respectively provided with mounting holes <NUM>, and the two ends of the pivot shaft <NUM> may be respectively inserted into the corresponding mounting holes <NUM>. By rotating the switching cover <NUM> relative to the main body <NUM>, the main air outlet channel <NUM> can be switched to communicate with the rear air outlet channel <NUM> or the front air outlet channel <NUM> to meet different usage requirements. The switching cover <NUM> can be manually adjusted by removing the recovery bin <NUM> and manipulating the switching cover <NUM>.

Referring to <FIG> and <FIG>, in an example, the switching mechanism <NUM> may further comprise a lever <NUM>. One end of the lever <NUM> may be fixed to the pivot shaft <NUM> and the other end of the lever <NUM> may extend out of the main body <NUM>. The switching cover <NUM> may be fixedly connected to the pivot shaft <NUM>, which can be rotatably mounted in the mounting hole <NUM> without removing the recovery bin <NUM>. By directly manipulating the lever <NUM>, the pivot shaft <NUM> can be rotated to drive the switching cover <NUM> to switch between the first and second states, making it easy and convenient to operate.

In an example, the lever <NUM> can be fixed to the end of the switching cover <NUM> with the pivot shaft <NUM>, and the other end of the lever <NUM> may extend out of the main body <NUM>. The pivot shaft <NUM> may be fixedly connected to the switching cover <NUM> and can be rotatably mounted in the mounting hole <NUM>. By manipulating (e.g., placing) the lever <NUM>, the switching cover <NUM> can be rotated relative to the pivot shaft <NUM> to adjust its state.

In an example, the switching mechanism <NUM> may further comprise a driving member that is connected to the switching cover <NUM> for driving the switching cover <NUM> to move relative to the main body <NUM>. The driving member can be an electric motor or the like that drives the switching cover <NUM> to rotate automatically to adjust its state.

A first sensing switch may be provided on the main body <NUM>, and when the switching mechanism <NUM> is in the first state, the switching cover <NUM> can contact the first sensing switch. For example, when the switching cover <NUM> completely closes the rear air outlet channel <NUM>, the switching cover <NUM> can trigger the first sensing switch, and the floor cleaning device may blow air to the front side of the main body <NUM> through the front air outlet channel <NUM>.

Additionally, a second sensing switch may be provided on the main body <NUM>, and when the switching mechanism <NUM> is in the second state, the switching cover <NUM> can contact the second sensing switch. For example, when the switching cover <NUM> completely opens the rear air outlet channel <NUM>, the switching cover <NUM> can trigger the second sensing switch, and the floor cleaning device may blow air to the cleaning surface through the rear air outlet channel <NUM>. The cleaning surface refers to the area that has been cleaned by the floor cleaning device, e.g., the area behind the floor cleaning device. The terms "front" and "rear" are based on the direction of movement of the floor cleaning device.

The floor cleaning device may further comprise a controller that is connected to the driving member and is used to control the driving member to move the switching cover <NUM> according to the received instructions (e.g., signals) for front or rear air blowing. When the controller receives a sensing signal (e.g., an induction signal) from the first or second sensing switch, the controller may control the driving member to stop running. By coordinating with the first and/or second sensing switches, the controller can intelligently control the opening and closing of the driving member, making the operation more convenient and faster.

The floor cleaning device may further comprise a controller that is connected to the driving member and is configured to control the driving member to move the switching cover <NUM> according to the received instructions for front or rear air blowing. When the controller receives a sensing signal from the first or second sensing switch, the controller may control the driving member to continue running for T1 seconds before stopping. Due to assembly errors and tolerances of various parts of the floor cleaning device, when the switching cover <NUM> has contacted the first or second sensing switch, it may not be completely open or closed. In this case, the controller can control the driving member to continue running for T1 seconds (or a predetermined portion of T1 seconds) after receiving the sensing signal, to solve the problem of incomplete opening or closing caused by possible errors. T1 can be flexibly set according to the actual product. In an example, T1 may be between <NUM> and <NUM> seconds.

Additionally or alternatively, when an operating current of the driving member (e.g., an operating current at the input or output of the driving member) is greater than or equal to a preset current and the controller receives a sensing signal from the first or second sensing switch, the controller may control the driving member to stop running. Compared with the above two examples, this example introduces detection of the operating current of the driving member. The preset current may be a value pre-stored in the controller and can be obtained by detecting the operating current when the driving member drives the switching cover <NUM> to completely open or close. When the switching cover <NUM> contacts or leaves the first or second sensing switch, there may be a certain resistance, causing the operating current of the driving member to increase momentarily.

By dual-judging the operating current of the driving member and the sensing signal, the switching cover <NUM> can be rotated to completely open or close, ensuring that the floor cleaning device can completely blow air to the rear or front, and avoiding air leakage. For example, when receiving the instruction for front air blowing, if the operating current of the driving member is greater than or equal to the preset current and the first sensing switch sends a sensing signal, the controller may determine that the switching cover <NUM> has rotated to the completely closed position; when receiving the instruction for rear air blowing, if the operating current of the driving member is greater than or equal to the preset current and the second sensing switch sends a sensing signal, the controller may determine that the switching cover <NUM> has rotated to the completely open position.

Furthermore, when the operating current of the driving member is greater than or equal to the preset current and the controller has not received any sensing signal from the first or second induction switch, the controller may control the driving component to continue running for T2 seconds. If the controller still has not received any sensing signal from the first or second sensing switch after T2 seconds, the controller may control the driving member to stop running. At this time, the controller can output fault information through the operation interface display, voice prompts, mobile app push notifications, etc., to notify the staff to troubleshoot in a timely manner. T2 can be flexibly set according to the actual product. In an example, T2 may be between <NUM> and <NUM> seconds.

Due to possible problems such as jamming during the operation of the switching cover <NUM>, timely detection of whether the switching cover <NUM> has rotated to the fully open or fully closed position can be achieved through the dual judgment of the operating current of the driving component and the induction signal. This can avoid air leakage. Specifically, when the instruction for front air outlet is received, if the operating current of the driving member is greater than or equal to the preset current and no sensing signal is received from the first sensing switch, it can be determined that the switching cover <NUM> has not rotated to the fully closed position if the driving member continues to run for T2 seconds without receiving any sensing signal from the first sensing switch. When the instruction for rear air outlet is received, if the operating current of the driving member is greater than or equal to the preset current and no sensing signal is received from the second sensing switch, it can be determined that the switching cover <NUM> has not rotated to the fully open position if the driving member continues to run for T2 seconds without receiving any sensing signal from the second sensing switch.

Additionally, the controller may be used to control the driving member to move the switching cover <NUM> for T3 seconds according to the received instruction for front or rear air outlet. When the operating current of the driving member is greater than or equal to the preset current, the controller may control the driving member to stop running. T3 can be set as half of the time required for the driving member to drive the switching cover <NUM> to complete one cycle of fully open state, fully closed state, and fully open state. The preset current may be the same as described in the above examples. After the driving member drives the switching cover <NUM> to complete one cycle of fully open state to fully closed state, the operating current of the driving member may be further detected. Through the dual judgment, it is ensured that the switching cover <NUM> has rotated to the fully open or fully closed position, thereby ensuring that the floor cleaning device can fully blow out the rear or front air outlet without air leakage.

The starting point of T3 can be calculated from the instruction of front air outlet or rear air outlet received by the controller, without setting the first sensing switch and the second sensing switch. Alternatively, when the front air outlet instruction is received by the controller, the second induction switch may send an sensing signal as the switching cover <NUM> needs to leave the second sensing switch from the fully open position, and the controller may start calculating T3 upon receiving the sensing signal sent by the second sensing switch. Alternatively, when the rear air outlet instruction is received by the controller, the first sensing switch may send a sensing signal as the switching cover <NUM> needs to leave the fully closed position of the first sensing switch, and the controller may start calculating T3 upon receiving the sensing signal sent by the first sensing switch.

In addition, when the operating current of the driving member is less than the preset current, the controller may control the driving member to continue running for T4 seconds. If the working current of the driving member is still less than the preset current after T4 seconds, the controller may control the driving member to stop running. At this time, the controller can output fault information through the operation interface display, voice prompts, mobile app push notifications, etc., to notify the staff to troubleshoot in a timely manner. T4 can be flexibly set according to the actual product. In an example, T4 may be between <NUM> and <NUM> seconds. Due to possible problems such as jamming during the operation of the switching cover <NUM>, the operating current of the driving member may be checked again after the driving member drives the switching cover <NUM> to continue running for T4 seconds. If the operating current of the driving member is still less than the preset current, it can be detected in a timely manner whether the switching cover <NUM> has rotated to the fully open or fully closed position, thereby avoiding air leakage.

Referring to <FIG>, <FIG>, <FIG>, and <FIG>, in an example, the main air outlet channel <NUM> may extend along the height direction of the main body. The front air outlet channel <NUM> may extend along the direction of the floor cleaning device's forward movement. The entrance of the rear air outlet channel <NUM> may face the extension direction of the main air outlet channel <NUM>. In the first state, the switching cover <NUM> may be set on the entrance of the rear air outlet channel <NUM>, and the switching cover <NUM> may be tilted along the extension direction of the front air outlet channel <NUM>. When the switching cover <NUM> is not set on the entrance of the rear air outlet channel <NUM>, since the main air outlet channel <NUM> extends along the height direction of the main body and the entrance of the rear air outlet channel <NUM> faces the extension direction of the main air outlet channel <NUM>, the air flowing out along the main air outlet channel <NUM> may directly blow towards the rear of the main body from below. When the switching cover <NUM> is set on the entrance of the rear air outlet channel <NUM> and tilted along the extension direction of the front air outlet channel <NUM>, the air flowing out along the main air outlet channel <NUM> cannot enter the rear air outlet channel <NUM>, but is blown towards the front air outlet channel <NUM> under the guidance of the switching cover <NUM>, and then blown out from the front of the main body. There is no obstruction in the air outlet direction, and the air resistance is small, which further reduces the energy consumption of the fan body <NUM>.

Referring to <FIG>, in an example, the main air outlet channel <NUM> may be provided with at least two outlets (e.g., the front air outlet channel <NUM> and the rear air outlet channel <NUM>). This setting facilitates the flexible setting of various components of the floor cleaning device, allowing the airflow to be discharged from the front or rear side of the main body <NUM>. The number of outlets required for the main exhaust duct <NUM> can be set according to the usage requirements, such as one, two, or three, etc. The outlet of the main air outlet channel <NUM> may correspond to the switching cover <NUM>, so that the outlet of the main air outlet channel <NUM> can be connected or disconnected from the rear air outlet channel <NUM>.

In an example, the front side of the main body <NUM> may be provided with a Y-shaped groove <NUM>, and the rear side of the recovery bin <NUM> may be connected to the Y-shaped main air outlet channel <NUM> formed by the Y-shaped groove <NUM>. The main air outlet channel <NUM> may comprise a main branch along the vertical direction and two branches <NUM> branching out from the end of the main branch to both sides. The air blown out from the air outlet <NUM> may first enter the main branch and then may be divided into two branches <NUM>. The front air outlet channel <NUM> and the rear air outlet channel <NUM> may be respectively connected to the two branches <NUM> of the main air outlet channel <NUM>. The shaft <NUM> and the switching cover <NUM> may be respectively set at the two branches <NUM> of the main air outlet channel <NUM>. By setting the shaft <NUM> and the switching cover <NUM> at each branch <NUM>, the front air outlet channel <NUM> and the rear air outlet channel <NUM> on the corresponding side can be switched to meet different scene requirements.

Referring to <FIG>, in an example, the two shafts <NUM> can be fixedly connected as one, and the lever <NUM> may be set in the middle to adjust the two switching covers <NUM> at the same time. Alternatively, a driving member can be set between the two branches <NUM> to simultaneously drive the two shafts <NUM> to rotate and adjust the two switching covers <NUM>.

Referring to <FIG>, in an example, the bottom of the main body <NUM> may be provided with a connection hole <NUM>. One end of the bent pipe <NUM> may be sealedly connected to the connection hole <NUM>, the other end of the bent pipe <NUM> may be sealably connected to the brush <NUM> and communicate with the suction port <NUM>, and the recovery duct <NUM> in the recovery bin <NUM> may be sealably connected to the connection hole <NUM>. The two front air outlet channels <NUM> may be located on both sides of the connection hole <NUM>. For example, the two air outlet channels <NUM> may be connected to the two branches <NUM> of the main air outlet channel <NUM> by being respectively abutted against the two sides of the bottom of the recovery bin <NUM>. The recovery duct <NUM> may be set between the two front air outlet channels <NUM>, and the front air outlet channel <NUM> may be extended from the main body <NUM> to the front of the recovery bin <NUM>, avoiding the recovery duct <NUM>.

The main body <NUM> may include a main shell <NUM> (e.g., housing) and a rear shell <NUM> that are connected to each other, and the recovery bin <NUM> may be connected to the main shell <NUM>. The main air outlet channel <NUM> may be formed at the rear of the recovery bin <NUM>, and the front air outlet channel <NUM> may be formed on both sides of the bottom of the recovery bin <NUM>. The front air outlet channel <NUM> may extend downwardly from the rear of the recovery bin <NUM> to its bottom and is smoothly connected to the main air outlet channel <NUM>.

Furthermore, referring to <FIG>, <FIG>, and <FIG>, the floor cleaning device may further comprise a rear exhaust assembly <NUM>, which may comprise a hollow structure forming the rear air outlet channel24. The fan assembly <NUM> may be located at the upper part of the cavity surrounded by the main shell <NUM> and the rear shell <NUM>. The rear exhaust assembly <NUM> may be located at the lower part of the cavity surrounded by the main shell <NUM> and the rear shell <NUM>. The end of the main air outlet channel <NUM> of the main shell <NUM> is provided with an opening <NUM>, and the inlet of the rear exhaust assembly <NUM> may be connected to the opening <NUM>. The outlet of the rear exhaust assembly <NUM> may extend out of the rear shell <NUM> and face downwardly to the rear side of the rear shell <NUM>. When the opening <NUM> is unobstructed and faces the extension direction of the main air outlet channel22, the air can directly enter the rear air outlet channel <NUM> through the opening <NUM>.

Furthermore, the rear exhaust assembly <NUM> may comprise a first pipe shell <NUM> set inside the rear shell <NUM> and a second pipe shell <NUM> extending out of the rear shell <NUM>. One end of the first pipe shell <NUM> may be connected to the opening <NUM>, the other end of the first pipe shell <NUM> may be connected to one end of the second pipe shell <NUM>, and the other end of the second pipe shell <NUM> may face the ground. The first pipe shell <NUM> and the second pipe shell <NUM> may comprise hollow structures, and the rear air outlet channel <NUM> may be formed inside. The air flowing out of the opening <NUM> may blow toward the ground at the rear under the guidance of the first pipe shell <NUM> and the second pipe shell <NUM>. Furthermore, the two branches <NUM> of the main air outlet channel22 may be both provided with the opening <NUM> at the end, and the two sides of the first pipe shell <NUM> and the second pipe shell <NUM> may be correspondingly provided with the rear air outlet channel <NUM>, which are respectively connected to the two openings <NUM>. When the switching mechanism <NUM> is in the second state, the air flowing out of the two branches <NUM> may be blown out through the rear air outlet channels <NUM> on both sides. One end of the first pipe shell <NUM> may be sealably connected to the main shell <NUM>, and the other end may be sealably connected to the second pipe shell <NUM>. In the second state, all the air may be blown toward the ground from the outlet of the second pipe shell <NUM>.

Referring to <FIG>, <FIG>, and <FIG>, the main shell <NUM> may be provided with an embedded groove <NUM> on the upper side corresponding to the opening <NUM>, and the two side walls of the embedded groove <NUM> may be respectively provided with mounting holes <NUM>. One end of the switching cover <NUM> may be provided with a card holder <NUM> that matches the embedded groove <NUM>. The card holder <NUM> may be provided with a shaft hole <NUM>. When the switching cover <NUM> is opened and flipped up in the second state, the card holder <NUM> may be locked in the embedded groove <NUM> by the card holder <NUM> and the embedded groove <NUM>. By matching the card holder <NUM> with the embedded groove <NUM>, the switching cover <NUM> can be kept in the second state without flipping down when there is no user operation, avoiding the switching cover <NUM> from covering the opening <NUM> and affecting the rearward airflow.

The floor cleaning device described herein may be a cleaning machine such as a floor washer and/or a floor sweeper.

Claim 1:
A ground cleaning device, comprising:
- a ground brush;
- a main body (<NUM>) that comprises a main air outlet channel (<NUM>), a front air outlet channel (<NUM>), and a rear air outlet channel (<NUM>);
- a fan located on the main body (<NUM>) and comprising an air inlet (<NUM>) and an air outlet (<NUM>); and
- a switching device (<NUM>),
wherein:
- the ground brush is connected to the main body (<NUM>) and comprises a suction port (<NUM>),
- the suction port (<NUM>) is connected to the air inlet (<NUM>),
- a first end of the main air outlet channel (<NUM>) is connected to the air outlet (<NUM>),
- a second end of the main air outlet channel (<NUM>) is connected to the switching device (<NUM>), and
- the switching device (<NUM>) has a first state and a second state, and when the switching device (<NUM>) is in the first state, the rear air outlet channel (<NUM>) is isolated from the main air outlet channel (<NUM>), and when the switching device (<NUM>) is in the second state, the rear air outlet channel (<NUM>) is connected to the main air outlet channel (<NUM>).