Surface cleaning device and method of controlling the same

Abstract

The present disclosure provides a surface cleaning device, comprising: a foam generating assembly, the foam generating assembly comprising: a gas pump, the gas pump being in communication with the atmosphere; a liquid pump, the liquid pump being in communication with a cleaning liquid storage chamber; a gas pump driving motor for driving the operation of the gas pump; a liquid pump driving motor for driving the forward or reverse operation of the liquid pump; and a gas-liquid mixing chamber, the gas pump and the liquid pump being connected to the gas-liquid mixing chamber through pipelines respectively, and the gas and the liquid being mixed in the gas-liquid mixing chamber; a foam outlet, the foam outlet being in communication with the gas-liquid mixing chamber; wherein when a start signal is sent to the foam generating assembly, the liquid pump driving motor drives the forward operation of the liquid pump at the same time or after the start of the gas pump driving motor; when a stop signal is sent to the foam generating assembly, the liquid pump driving motor stops driving the forward operation of the liquid pump or switches from driving the forward operation of the liquid pump to the reverse operation at the same time or before the stop of the gas pump driving motor.

Description

Technical Field

[0001] This disclosure relates to a surface cleaning device and its control method. Background Technology

[0002] In existing wet surface cleaners, detergent needs to be added to the cleaning solution reservoir to improve cleaning effectiveness. However, the ratio of detergent to water is difficult to control manually; excessive detergent can cause the floor to become slippery, while insufficient detergent or a small amount results in poor cleaning performance.

[0003] Cleaning surfaces by applying foam to the ground is one way to solve the aforementioned technical problems. For example, patent publication CN219229787U discloses a cleaning device that cleans surfaces by spraying foam. In use, this device uses only one drive unit to power an air pump and a liquid pump to mix and generate foam, saving design space and cost.

[0004] A further need is to find a way to more effectively improve foam generation efficiency and avoid leaving unnecessary foam residue during the cleaning process, which is a question that requires further research. Summary of the Invention

[0005] To address one of the aforementioned technical problems, this disclosure provides a surface cleaning device and its control method.

[0006] According to one aspect of this disclosure, a surface cleaning apparatus is provided, comprising: The suction nozzle defines a dirt inlet leading to a recovery channel of the surface cleaning device; A roller brush, adjacent to the suction nozzle, is configured to agitate and pick up dirt from the floor surface to be cleaned; A brush cavity is configured to partially surround the brush, and the suction nozzle is defined within the brush cavity; A liquid dispenser, located within the roller brush chamber, is configured to dispense cleaning liquid to at least one of the roller brush and the floor surface to be cleaned. A foam generating component is disposed adjacent to the roller brush cavity, and the foam generating component includes: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; Specifically, when a start signal is sent to the foam generating component, the liquid pump drive motor drives the liquid pump to run in the forward direction at the same time as or after the air pump drive motor starts; and when a stop signal is sent to the foam generating component, the liquid pump drive motor stops driving the liquid pump to run in the forward direction or switches from driving the liquid pump to running in the reverse direction at the same time as or before the air pump drive motor stops.

[0007] According to one example of this disclosure, a first driver associated with a roller brush is included, which is energized during operation of the surface cleaning device to drive the roller brush to rotate; the surface cleaning device is configured such that after the first driver stops operating, the liquid pump drive motor drives the liquid pump to run in reverse.

[0008] According to one example of this disclosure, a first driver associated with a roller brush is included, which is energized during operation of the surface cleaning device to drive the roller brush to rotate; the surface cleaning device is configured such that the liquid pump drive motor is de-energized at the same time as or after the first driver is de-energized.

[0009] According to one example of this disclosure, a liquid supply pump associated with a liquid dispenser is included, which is energized during operation of the surface cleaning device to dispense cleaning fluid to the roller brush through the liquid dispenser to wet the roller brush; the surface cleaning device is configured such that, at the same time as or after the liquid supply pump is de-energized, the liquid pump drive motor drives the liquid pump to run in reverse.

[0010] According to one example of this disclosure, a liquid supply pump associated with a liquid dispenser is included, which is energized during operation of the surface cleaning device to dispense cleaning fluid to the roller brush via the liquid dispenser to wet the roller brush; the surface cleaning device is configured to de-energize the liquid pump drive motor simultaneously with or after the liquid supply pump is de-energized.

[0011] According to one example of this disclosure, a one-way valve is provided on the pipeline from the air pump to the gas-liquid mixing chamber to prevent liquid or foam from flowing back into the air pump.

[0012] According to one example of this disclosure, the foam outlet is located in front of the roller brush.

[0013] According to one example of this disclosure, the foam outlet is located inside the brush cavity and adjacent to the brush, or the foam outlet is located outside the brush cavity and adjacent to the brush cavity.

[0014] According to another aspect of this disclosure, a method for controlling a surface cleaning apparatus is provided, the surface cleaning apparatus comprising: The roller brush is configured to agitate and pick up dirt from the floor surface to be cleaned; A liquid dispenser, located within the roller brush chamber, is configured to dispense cleaning liquid to at least one of the roller brush and the floor surface to be cleaned. Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: a foam generation component receiving a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the forward direction.

[0015] According to another aspect of this disclosure, a method for controlling a surface cleaning device is provided, the surface cleaning device comprising: The roller brush is configured to agitate and pick up dirt from the floor surface to be cleaned; A liquid dispenser, located within the roller brush chamber, is configured to dispense cleaning liquid to at least one of the roller brush and the floor surface to be cleaned. Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: the foam generating component receiving a shutdown signal; The liquid pump drive motor is de-energized or the liquid pump drive motor is instructed to drive the liquid pump in reverse, while the air pump drive motor remains energized. After the second timer expires, the air pump drive motor is de-energized.

[0016] According to another aspect of this disclosure, a method for controlling a surface cleaning device is provided, the surface cleaning device comprising: A roller brush, and a roller brush motor associated with the roller brush; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: energizing a roller brush motor to drive the roller brush to agitate and pick up dirt from the floor surface to be cleaned; The foam generation component receives a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the positive direction; The liquid pump drive motor is de-energized at the same time as or after the roller brush motor is de-energized.

[0017] According to another aspect of this disclosure, a method for controlling a surface cleaning device is provided, the surface cleaning device comprising: A roller brush, and a roller brush motor associated with the roller brush; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: energizing a roller brush motor to drive the roller brush to agitate and pick up dirt from the floor surface to be cleaned; The foam generation component receives a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the positive direction; At the same time or after the roller brush motor is de-energized, the liquid pump drive motor drives the liquid pump to run in reverse, and is de-energized after a third timer period of reverse running.

[0018] According to another aspect of this disclosure, a method for controlling a surface cleaning device is provided, the surface cleaning device comprising: The roller brush is configured to agitate and pick up dirt from the floor surface to be cleaned; Liquid distributor and the liquid supply pump associated with the liquid distributor; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: energizing a liquid supply pump to dispense cleaning fluid to the roller brush via the liquid dispenser to wet the roller brush; The foam generation component receives a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the positive direction; The pump drive motor is de-energized at the same time as or after the liquid supply pump is de-energized.

[0019] According to another aspect of this disclosure, a method for controlling a surface cleaning device is provided, the surface cleaning device comprising: The roller brush is configured to agitate and pick up dirt from the floor surface to be cleaned; Liquid distributor and the liquid supply pump associated with the liquid distributor; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: energizing a liquid supply pump to dispense cleaning fluid to the roller brush via the liquid dispenser to wet the roller brush; The foam generation component receives a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the positive direction; At the same time or after the liquid supply pump is de-energized, the liquid pump drive motor drives the liquid pump to run in reverse, and the pump is de-energized after a fourth timer period of reverse operation.

[0020] According to another aspect of this disclosure, a control method for a surface cleaning device is provided, the surface cleaning device comprising: a roller brush, and a roller brush motor associated with the roller brush to drive the roller brush to rotate. A liquid dispenser and a supply pump associated with the liquid dispenser to provide cleaning fluid to the roller brush; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: placing the surface cleaning device on a self-cleaning tray; A self-cleaning start signal is sent to the surface cleaning device to initiate a self-cleaning cycle; A start signal is sent to the foam generating component to initiate the foam self-cleaning sub-cycle; During the foam self-cleaning sub-cycle, the liquid supply pump remains de-energized.

[0021] According to one example of this disclosure, the liquid supply pump is de-energized at the same time or after the foam generating component receives a start signal. Attached Figure Description

[0022] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0023] Figure 1 This is a schematic diagram of the structure of a surface cleaning device according to one embodiment of the present disclosure.

[0024] Figure 2 This is a schematic diagram of a cleaning head system according to one embodiment of the present disclosure.

[0025] Figure 3 This is a schematic diagram of the structure of a foam generation component according to one embodiment of the present disclosure.

[0026] Figure 4 This is a schematic diagram of the structure of a gas-liquid mixing chamber according to one embodiment of the present disclosure. Detailed Implementation

[0027] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0028] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Unless otherwise stated, the exemplary embodiments / examples shown are to be understood as providing exemplary features of various details of ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, features of various embodiments / examples may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0030] The use of crosshairs and / or shading in accompanying drawings is generally used to clarify the boundaries between adjacent parts. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, scale, commonalities between the parts shown, or any other characteristics, properties, etc., of the parts. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of parts may be exaggerated for clarity and / or descriptive purposes. A specific process sequence may be performed in a different order than that described when exemplary examples can be implemented differently. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Moreover, the same reference numerals denote the same parts.

[0031] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0032] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0033] The terminology used herein is for the purpose of describing specific examples and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not preclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent deviations in measurements, calculations, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0034] Among various surface cleaning devices, wet surface cleaning devices are suitable for deep cleaning of hard floor surfaces such as tile and hardwood. A wet surface cleaning device includes a fluid delivery system and a fluid recovery system. The former delivers the cleaning fluid to the surface to be cleaned, while the latter removes waste liquid and debris from the surface. The fluid delivery system typically includes multiple cleaning fluid storage chambers for storing the cleaning fluid, a fluid distributor for applying the cleaning fluid to the surface to be cleaned, and a fluid supply line for delivering the cleaning fluid from the cleaning fluid storage chambers to the fluid distributor. The wet surface cleaning device also includes an agitator for stirring the cleaning fluid on the surface to be cleaned, softening and dissolving stubborn dirt adhering to the surface. The fluid recovery system typically includes a recovery tank, a nozzle adjacent to the surface to be cleaned and fluidly connected to the recovery tank via a working air line, and a vacuum suction source fluidly connected to the working air line for sucking the cleaning fluid from the surface to be cleaned and drawing it into the recovery tank through the nozzle and working air line.

[0035] There are ongoing demands for improvements to floor surface cleaning equipment, including increased cleaning efficiency, better control over cleaning solution formulations, and other enhancements.

[0036] One improvement involves a foam cleaning technique for surfaces, enhancing cleaning efficiency by applying highly effective foam to the surface. This type of surface cleaner applies foam to the floor at a high flow rate, utilizing foam bursting technology to assist in cleaning stubborn dirt on hard floor surfaces. This foam application to hard floor surfaces allows the surface cleaner's roller brush to transfer dirt from the floor into the foam and cleaning solution, then removes the wastewater from the floor surface and collects it as a recovery liquid in the surface cleaner's recycling bin.

[0037] However, the quality of foam generation in existing floor surface cleaners is difficult to predict. While using a single drive mechanism to synchronously drive the air and liquid pumps significantly saves design space and reduces costs, the synchronous drive and control of these pumps makes it difficult to control them separately for precise dosage, often resulting in discrepancies between the foam output and the operator's expected amount. Furthermore, after the foam cleaning mode, the inherent stickiness of the foam sometimes leaves residual foam hanging at the foam outlet. Operators, aiming for high cleaning efficiency, often frequently operate the foam cleaning mode during floor cleaning, leading to foam residue accumulating at the outlet after the cleaning cycle. This residue is undesirable for users and poses a risk of clogging the outlet with prolonged use.

[0038] An example of the present invention improves the user experience by separately controlling the air pump and liquid pump of the foam generator and by using automatic control logic to improve foam output efficiency, cleaning efficiency and reduce foam residue at the outlet.

[0039] Figure 1 This is an example of a semi-automatic surface cleaning device according to one embodiment of the present disclosure. It is to be understood that this surface cleaning device is not a limitation of the present disclosure, which also includes self-moving surface cleaning robots.

[0040] like Figure 1 As shown, the surface cleaning device 100 of this disclosure is used to clean the floor surface to be cleaned. Preferably, the surface cleaning device 100 is capable of wet cleaning the floor surface to be cleaned and recovering the liquid after cleaning the floor surface to be cleaned back to the surface cleaning device 100.

[0041] The surface cleaning device 100 further includes a frame portion 130; the frame portion 130 is pivotally connected to the cleaning head system, and more specifically, the frame portion 130 is pivotally connected to the floor brush body 140 of the cleaning head system.

[0042] The frame 130 is provided with a handle 170. When the user holds the handle 170, the frame 130 and the cleaning head system can form a preset angle, so as to facilitate the user to operate the surface cleaning device 100 in the cleaning operation state.

[0043] The surface cleaning device 100 disclosed herein may further include a structure such as a cleaning liquid storage chamber 113, which is formed in the shape of a box to store cleaning liquid. The cleaning liquid storage chamber 113 is capable of storing cleaning liquid, for example, containing water, and a liquid supply pump can be connected to the cleaning liquid storage chamber 113, thereby enabling the delivery of cleaning liquid from the cleaning liquid storage chamber 113 to the floor brush body 140.

[0044] The frame portion 130 has a receiving space, and the cleaning fluid storage chamber 113 can be disposed in the receiving space, such that a portion of the outer surface of the cleaning fluid storage chamber 113 is formed as part of the outer surface of the surface cleaning device 100.

[0045] In this disclosure, the cleaning fluid storage chamber 113 can be detached from the frame portion 130 and filled with cleaning fluid manually by the user; of course, the cleaning fluid storage chamber 113 of this disclosure can also be filled with cleaning fluid through a cleaning fluid interface provided on the frame portion 130.

[0046] Furthermore, when the frame portion 130 is provided with a cleaning liquid interface, the cleaning liquid storage chamber 113 can be disposed inside the frame portion 130. In this case, the cleaning liquid storage chamber 113 does not form at least part of the outer surface of the surface cleaning device.

[0047] The surface cleaning device 100 also includes a recycling tank 123. The frame portion 130 forms a receiving space. The recycling tank 123 is detachably disposed on the frame portion 130 so that when there is a large amount of liquid stored in the recycling tank 123, the user can remove the recycling tank 123, pour out the sewage inside, and clean up the solid waste. At this time, part of the outer surface of the recycling tank 123 forms part of the outer surface of the surface cleaning device 100.

[0048] The cleaning head system includes a floor brush body 140 configured to move over the floor surface to be cleaned and defining a receiving chamber for the cleaning head system, in which at least a portion of the foam generating assembly 300 is disposed. In this disclosure, a cleaning liquid containing detergent can also be stored in a foaming agent storage chamber on the floor brush, which can be detached from the floor brush body 140 and manually refilled by a user.

[0049] The cleaning head system also includes a suction nozzle that defines a dirt inlet leading to a collection channel; in a preferred example, the suction nozzle may be formed in the brush body 140 and located behind the roller brush 150 to facilitate the collection of wastewater after the roller brush 150 has cleaned the floor surface.

[0050] The suction nozzle and the recycling tank 123 are connected by a recycling channel. In this disclosure, part of the recycling channel is located in the cleaning head system and part is located in the frame part 130, so that the mixture of sewage and gas can be recycled to the recycling tank 123 through the recycling channel.

[0051] The cleaning head system also includes a roller brush 150 adjacent to the suction nozzle. The roller brush 150 is configured to agitate the floor surface to be cleaned; that is, when the surface cleaning device 100 is performing a cleaning operation or a self-cleaning operation, the roller brush 150 can rotate, thereby enabling frictional contact between the roller brush 150 and the floor surface to be cleaned, achieving cleaning. During the frictional contact between the roller brush 150 and the floor surface, cleaning liquid can be supplied to the roller brush 150, thereby achieving wet cleaning of the floor surface.

[0052] The surface cleaning device 100 further includes a vacuum generator in fluid communication with the fluid recovery system to force gas flow within the recovery channel. In one example, the vacuum generator may be a suction motor capable of generating negative pressure, which can be applied to the recovery tank 123, thereby allowing gas to flow from the suction nozzle to the recovery tank 123, and consequently causing wastewater to flow in the same direction. More preferably, the vacuum generator is in fluid communication with the suction nozzle to generate working gas flowing through the recovery path during the self-cleaning cycle.

[0053] The cleaning head system includes a liquid dispenser configured to dispense cleaning liquid to at least one of the roller brush 150 and the floor surface to be cleaned. In a preferred example, the liquid dispenser may be configured as an outlet or a nozzle, thereby enabling the cleaning liquid to be sprayed onto the surface of the roller brush 150 or the floor surface to be cleaned by a supply pump. Of course, those skilled in the art will understand that the liquid dispenser may also be located inside the roller brush 150, thereby providing cleaning liquid to the inner surface of the bristles of the roller brush 150.

[0054] Accordingly, the cleaning fluid storage chamber 113 and the liquid dispenser are connected by a dispensing channel, which is partly located in the cleaning head system and partly located in the frame 130.

[0055] Preferably, the distribution channel can be equipped with components such as a liquid supply pump and a heating device. Thus, by setting up the liquid supply pump, the liquid in the cleaning liquid storage chamber 113 is pressurized and supplied to the liquid distributor, and further supplied to the roller brush 150 or the floor surface to be cleaned; correspondingly, by setting up the heating device, the cleaning liquid in the cleaning liquid storage chamber 113 can be heated and supplied to the liquid distributor, and further supplied to the roller brush 150 or the floor surface to be cleaned.

[0056] The cleaning head system may further include a cover 141 disposed on the brush body 140 and configured to partially surround the roller brush 150; in one example, the brush body 140 forms a receiving cavity, and the roller brush 150 is rotatably (self-rotatingly) disposed within the receiving cavity, in which case the cover 141 is also formed as part of the receiving cavity. In other words, the cover 141 and the brush body 140 together form the aforementioned receiving cavity.

[0057] The cleaning head system may further include a foam outlet 182 for conveying foam generated by the foam generating component 300 to the outside, wherein the foam outlet 182 is disposed on the cover 141.

[0058] In this disclosure, the foam outlet 182 is used to deliver the foam generated by the foam generating component 300 to the outside of the cover 141; in one example, there is one foam outlet 182, which is located at the center of the front end of the cleaning head system. In another example, there are two foam outlets 182, which are symmetrically arranged at the front end of the cleaning head system; correspondingly, when there are three or more foam outlets 182, these foam outlets 182 are evenly distributed laterally along the front end of the floor brush.

[0059] In this disclosure, the foam outlet 182 is located near the front end of the cleaning head system to emit foam in front of the cleaning head system; more preferably, the foam outlet 182 is positioned downwards so that the foam can be sprayed onto the ground in front of the cleaning head system and cleaned by the roller brush 150, improving the cleaning effect. In another example, the foam outlet may be located inside the brush body and facing the roller brush, so that the foam can be sprayed onto the surface of the roller brush body to coat the surface with foam, enhancing the roller brush's ability to pick up dirt particles from the ground.

[0060] The foam delivered outward from the foam outlet is horizontally distributed on the surface to be cleaned in front of the cleaning head system, and its width does not exceed the projected width of the cleaning head system on the surface to be cleaned, thereby maximizing the utilization of the cleaning foam and preventing foam waste.

[0061] The structure of the foam generating component of this disclosure will be described in detail below with reference to the accompanying drawings.

[0062] Figure 3 This is a schematic diagram of the structure of a foam generation component according to one embodiment of the present disclosure.

[0063] like Figure 3 The present disclosure provides a foam generating component 300, which includes structures such as an air pump 310, a liquid pump 320, and a gas-liquid mixer 330.

[0064] The air pump 310 is connected to the atmosphere to draw in gas directly from the atmosphere and can supply gas to the gas-liquid mixer 330, for example, to supply gas at a high flow rate.

[0065] In one example, the air pump 310 can be driven by the air pump drive motor 340 to generate high-velocity gas. That is, the air pump drive motor 340 is connected to the air pump 310 in a driving connection, and when the air pump drive motor 340 is rotating, it enables the air pump 310 to be in a working state and continuously output high-velocity gas.

[0066] The air pump 310 can be a centrifugal pump, plunger pump, impeller pump, diaphragm pump, etc. This disclosure does not limit the type of air pump 310, as long as the air pump 310 can generate high-pressure gas.

[0067] In one example, the liquid pump 320 is connected to a cleaning fluid storage chamber for supplying liquid. The liquid pump 320 is driven by a liquid pump drive motor 341, which is connected to the liquid pump 320. When the liquid pump drive motor 341 is rotating in the forward direction, the liquid pump 320 is in a first operating state, continuously outputting liquid containing cleaning agent and / or foaming agent. When the liquid pump drive motor 341 is rotating in the reverse direction, the liquid pump 320 is in a second operating state, in which it generates a suction force from the outside in. The liquid pump 320 is preferably a peristaltic pump; however, those skilled in the art will understand that a peristaltic pump is merely a preferred implementation. Other pumps, such as impeller pumps and plunger pumps, can also be selected in this disclosure.

[0068] like Figure 3 As shown, both the air pump 310 and the liquid pump 320 are connected to the gas-liquid mixer 330, enabling the gas-liquid mixer 330 to receive the gas generated by the air pump 310 and the liquid generated by the liquid pump 320; and to mix the gas and liquid in the gas-liquid mixer 330 to generate foam.

[0069] In a specific structure, such as Figure 4 As shown, the gas-liquid mixer 330 includes structures such as a first inlet 331, a second inlet 332, and a gas-liquid mixing chamber 333.

[0070] The first inlet 331 is used to introduce liquid; in this disclosure, the first inlet 331 can be connected to a liquid pump 320 via a first pipeline; the second inlet 332 can be connected to a gas pump 310 via a second pipeline to introduce gas. The gas-liquid mixing chamber 333 is used to mix the liquid and gas, wherein the first inlet 331 and the second inlet 332 form a preset angle; in a preferred example, the first inlet 331 and the second inlet 332 are vertically distributed, for example... Figure 3 As shown, the first inlet 331 is generally horizontal and the second inlet 332 is generally vertical. In this case, the second inlet 332 is perpendicular or approximately perpendicular to the flow direction of the liquid in the gas-liquid mixing chamber 333. This arrangement is more conducive to mixing gas into the liquid, thereby forming abundant foam.

[0071] In a preferred example, the gas-liquid mixer 330 further includes a columnar filter 334 comprising one or more elongated filter holes through which the gas and liquid mixture is conveyed to and discharged from a foam outlet.

[0072] In this disclosure, the speed of foam output can be controlled by adjusting the rotational speed of the drive motor.

[0073] The foam generating assembly 300 disclosed herein also includes an air pump drive motor 340 and a liquid pump drive motor 341. The air pump drive motor 340 drives the air pump 310, and the liquid pump drive motor 341 drives the liquid pump 320, thereby enabling the air pump 310 and the liquid pump 320 to operate at the same frequency or different frequencies. In one example, the air pump drive motor 340 and the liquid pump drive motor 341 can be arranged substantially parallel in the floor brush body to facilitate pipeline wiring. Additionally, to save structural design space, the air pump drive motor 340 and the liquid pump drive motor 341 are arranged substantially perpendicularly. In a preferred example, the liquid pump 320 is driven to rotate in the opposite direction by the liquid pump drive motor 341, which prevents the gas-liquid mixer 330 from outputting foam through the foam outlet 182. Instead, it causes the foam to move from the foam outlet 182 towards the gas-liquid mixer 330, thereby facilitating foam recovery and preventing excess foam residue at the foam outlet 182.

[0074] In one example, air pump 310 and liquid pump 320 are connected to gas-liquid mixer 330 via a second pipe and a first pipe, respectively.

[0075] It is worth mentioning that this disclosure provides a one-way valve 311 on the second pipe of the air pump 310. The purpose of providing the one-way valve 311 is to protect the structural safety of the air pump 310, prevent liquid or other substances from flowing back into the air pump and affecting its performance, especially when the liquid pump 320 reverses, to prevent foam from being introduced back into the air pump; or to prevent the liquid in the liquid pump 320 from flowing back into the air pump under hydraulic pressure when a channel of the foam assembly is blocked, thus preventing the liquid from flowing smoothly to the foam outlet 182.

[0076] By using an air pump drive motor 340 to drive an air pump 310 and a liquid pump drive motor 341 to drive a liquid pump 320, the foam quality can be adjusted according to different working conditions. The start-stop time and operating duration of the liquid pump 320 and air pump 310 can be adjusted to adapt to different working situations, such as during floor cleaning, after floor cleaning, and during self-cleaning. Furthermore, the peristaltic pump design solves the problem of solution adhesion and lack of water flow. The diaphragm pump achieves high flow rate in a small volume, resulting in a small overall pump size and low cost. Moreover, the separate design of the air pump drive motor 340 and the liquid pump drive motor 341 improves the reliability of foam generation, significantly enhancing the cleaning efficiency of the foam generation component disclosed herein.

[0077] The control method for the surface cleaning equipment disclosed herein can control the aforementioned surface cleaning equipment, thereby enabling the cleaning operation of the surface to be cleaned.

[0078] Specifically, the control method of the surface cleaning equipment disclosed herein includes: determining whether the surface cleaning equipment is started; starting the surface cleaning equipment when it is not started; when the surface cleaning equipment is started, receiving a foam treatment signal for the surface to be cleaned; performing a self-test on the surface cleaning equipment to obtain its current state; determining whether the surface cleaning equipment meets preset conditions based on its current state; and allowing foam treatment of the surface to be cleaned when the surface cleaning equipment meets the preset conditions. The foam treatment includes, A start signal is sent to the foam generating component. This start signal can be initiated by the user through the interactive interface of the surface cleaning equipment. The user interface includes, but is not limited to, physical or virtual buttons on the surface cleaning equipment itself, or physical or virtual buttons on other operating devices outside the surface cleaning equipment. Once a button is triggered, the start signal is sent to the controller. The controller processes the signal and then sends an execution signal to the foam generating component to perform the foam generating operation. Additionally, in other operating conditions, such as the self-cleaning phase or the automatic timed cleaning plan of a self-moving cleaning robot, this start signal can also be automatically sent according to the user's cleaning plan settings.

[0079] When the start signal is sent to the foam generating component, the liquid pump drive motor and the air pump drive motor start simultaneously to begin foam generation. At this time, the liquid pump drive motor drives the liquid pump to rotate forward to deliver cleaning liquid containing detergent and / or foaming agent to the gas-liquid mixing chamber, and the air pump drive motor drives the air pump to deliver air to the gas-liquid mixing chamber. The cleaning liquid and air are mixed in the gas-liquid mixing chamber and then output as foam after passing through a component such as column filter 334.

[0080] It's possible that some cleaning fluid remains in the gas-liquid mixing chamber after the last use. Therefore, when the gas and liquid are reintroduced into the gas-liquid mixer 330, the mixing ratio may be imbalanced, for example, the gas-liquid ratio of the cleaning fluid may become oversaturated. Consequently, in the initial stage of foam generation, the foam outlet 182 may initially produce liquid mixed with a small amount of foam. To improve the user experience, optionally, when the controller sends an execution signal to the foam generation component, it may energize the air pump drive motor for a first timer period. During this first timer period, the liquid pump drive motor remains de-energized. Thus, during this first timer period, atmospheric air and residual cleaning fluid form foam within the gas-liquid mixer 330, which is then output from the foam outlet 182. Alternatively, in another scenario (where no residual cleaning fluid is present in the gas-liquid mixer 330), it is understood that during the first timer period, the foam outlet 182 will only output atmospheric air, without any output of cleaning fluid.

[0081] The foam cleaning mode plays a supporting role, not the primary one, throughout the cleaning cycle. Therefore, it should be activated and deactivated at least once during the entire cleaning cycle. Consequently, consideration must be given to preventing situations where only cleaning fluid is output, or where most of the cleaning fluid is mixed with a small amount of foam, when restarting after deactivation. Therefore, when the deactivation signal is sent to the foam generation component, the air pump drive motor and liquid pump drive motor need to be adjusted separately for control.

[0082] Specifically, when a shutdown signal is sent to the foam generating component, the liquid pump drive motor needs to be de-energized immediately at the same time as the pneumatic drive motor, or more preferably, the liquid pump drive motor current reverses simultaneously with the de-energization of the pneumatic drive motor, driving the liquid pump to immediately switch from forward operation to reverse operation. Understandably, during the reverse operation of the liquid pump, residual foam or liquid at the foam outlet 182 is at least partially drawn back into the gas-liquid mixing chamber. Furthermore, residual foam or liquid in the gas-liquid mixer 330 is recycled into the liquid pump or the detergent storage section. This ensures that no foam remains at the foam outlet 182 after the foam cleaning mode is turned off. Additionally, it reduces the phenomenon of liquid being sprayed out first when foam cleaning is restarted.

[0083] In this disclosure, since it is necessary to control the operation of actuators, such as keeping the roller brush rotating, when cleaning the surface to be cleaned, the liquid pump of the liquid distributor operates to supply cleaning liquid to the roller brush to facilitate the pickup of stubborn stains on the floor during wet cleaning. If the aforementioned actuators are shut off or malfunction when the cleaning mode is activated, excessive foam will accumulate on the floor, making it impossible to completely recover. The residual foam will generate less friction on hard surfaces, increasing the risk of slipping and posing a safety hazard.

[0084] According to one example of this disclosure, after cleaning begins, the roller brush motor is energized to drive the roller brush to agitate and pick up dirt from the floor surface to be cleaned. While the roller brush motor is energized, the roller brush continuously rotates to pick up residue from the floor, and under vacuum, the residue is collected in the recovery section of the surface cleaning device. Therefore, applying foam is feasible while the roller brush is continuously rotating, as there will not be excessive residual foam left on the floor surface. However, when the roller brush motor is de-energized, the roller brush also stops rotating, and residue pickup ceases. Therefore, if the foam assembly continues to operate, excessive foam residue will remain on the floor or roller brush surface and cannot be removed. Therefore, in one example of this disclosure, at the same time or after the roller brush motor is de-energized, the liquid pump drive motor, a key component of the foam generating assembly, should be de-energized and stopped to prevent further foam output to the floor or roller brush. It should be understood that the continuous reverse rotation of the liquid pump drive motor will lead to an increase in internal pressure. Therefore, after the third timer period, the liquid pump drive motor should be de-energized to prevent damage to the foam generation components.

[0085] According to another example of this disclosure, after cleaning begins, the liquid pump is energized to drive the cleaning liquid in the cleaning liquid storage chamber 113 to spray onto the roller brush, thereby wetting the roller brush, improving its ability to pick up ground particles, and under the action of vacuum force, the residue is recovered into the recovery section of the surface cleaning device. Similar to the above example, it is feasible to apply foam while the liquid pump is continuously delivering liquid. As the liquid continues to be output, the foam is further diluted, and no excessive residual foam is left on the floor surface. However, when the liquid pump is de-energized, even if the roller brush continues to rotate, since the cleaning liquid is no longer supplied, if the foam assembly continues to operate, excessive foam will remain on the floor or roller brush surface and cannot be removed. Therefore, in one example of this disclosure, at the same time or after the liquid pump is de-energized, the liquid pump drive motor, which is a major part of the foam generating assembly, should be de-energized and stopped to prevent further foam output onto the floor or roller brush. It should also be understood that the continuous reverse rotation of the liquid pump drive motor will increase the internal pressure. Therefore, after the fourth timer period, the power to the liquid pump drive motor should be disconnected to prevent damage to the foam generation components. It should be understood that the aforementioned first, second, third, and fourth timer periods are named only to distinguish different scenarios and do not necessarily imply different actual times. The aforementioned first, second, third, and fourth timer periods can be partially the same, all the same, or all different.

[0086] According to an example of this disclosure, the surface cleaning device processing method of this disclosure can clean the roller brush 150 of the surface cleaning device, and remove dirt from the roller brush 150 after the cleaning operation is completed, so that the roller brush 150 does not emit odor.

[0087] Specifically, the surface cleaning device's processing method includes: the surface cleaning device receiving a signal to perform foam treatment on the roller brush 150; determining whether the surface cleaning device is docked on a tray; if the surface cleaning device is not docked on the tray, docking the surface cleaning device on the tray and then initiating the request to perform foam treatment on the roller brush 150; if the surface cleaning device is docked on the tray, performing a self-check to obtain the current state of the surface cleaning device; based on the current state of the surface cleaning device, determining whether the surface cleaning device meets preset conditions; if the surface cleaning device meets the preset conditions, allowing foam treatment on the roller brush 150. The foam treatment can be considered a sub-loop of the self-circulation to enhance the self-cleaning effect on the roller brush and pipes.

[0088] In this disclosure, the handle 170 of the surface cleaning device may be provided with a foam supply button. When the surface cleaning device is in operation, triggering the foam supply button generates a foam processing signal for the surface to be cleaned.

[0089] Of course, a foam treatment signal for the surface to be cleaned can also be generated by operating an APP or other means.

[0090] During the foam treatment process, foam treatment efficiency should be ensured to allow the foam to fully adhere to the roller brush surface, utilizing the foam's own cleaning ability to more effectively remove stains adhering to the roller brush surface. In one example, to prevent foam dilution during the self-cleaning process, additional liquid should be avoided from rinsing onto the roller brush surface. Therefore, during the self-cleaning and self-circulating foam treatment process, the liquid dispenser should be prevented from continuing to dispense liquid to the roller brush. At least during at least one stage of the foam treatment cycle, the liquid supply pump is de-energized to stop the continuous supply of liquid to the roller brush. In a preferred example, during the self-cleaning cycle, when a foam treatment signal is received, the power supply to the liquid supply pump is stopped.

[0091] Simultaneously or subsequently, when the foam generating component receives the start signal, the air pump drive motor is energized while the liquid pump drive motor and the liquid supply pump remain de-energized; and, after a first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the forward direction.

[0092] After the foam treatment is completed, the liquid supply pump is powered again to supply cleaning liquid to the roller brush, and the diluted foam and cleaning liquid mixture is recycled back to the surface cleaning equipment 100 under vacuum.

[0093] In the description of this specification, the references to terms such as "an example / method," "some examples / methods," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that example / method or example is included in at least one example / method or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same example / method or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more examples / methods or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different examples / methods or examples described in this specification, as well as the features of different examples / methods or examples.

[0094] Furthermore, the terms "first" and "second" are 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0095] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A surface cleaning device characterized by, include: The suction nozzle defines a dirt inlet leading to a recovery channel of the surface cleaning device; A roller brush, adjacent to the suction nozzle, is configured to agitate and pick up dirt from the floor surface to be cleaned; A brush cavity is configured to partially surround the brush, and the suction nozzle is defined within the brush cavity; A liquid dispenser, located within the roller brush chamber, is configured to dispense cleaning liquid to at least one of the roller brush and the floor surface to be cleaned. A foam generating component is disposed adjacent to the roller brush cavity, and the foam generating component includes: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; Specifically, when a start signal is sent to the foam generating component, the liquid pump drive motor drives the liquid pump to run in the forward direction at the same time as or after the air pump drive motor starts; and when a stop signal is sent to the foam generating component, the liquid pump drive motor stops driving the liquid pump to run in the forward direction or switches from driving the liquid pump to running in the reverse direction at the same time as or before the air pump drive motor stops.

2. The surface cleaning apparatus of claim 1, wherein, Includes a first driver associated with the roller brush, which is energized during operation of the surface cleaning device to drive the roller brush to rotate. The surface cleaning device is configured such that after the first driver stops operating, the liquid pump drive motor drives the liquid pump to run in reverse. Optionally, a first driver associated with the roller brush is included, which is energized during operation of the surface cleaning device to drive the roller brush to rotate. The surface cleaning device is configured such that the liquid pump drive motor is de-energized at the same time as or after the first drive is de-energized; Optionally, a liquid supply pump associated with a liquid dispenser is included, which is energized during operation of the surface cleaning device to dispense cleaning liquid to the roller brush through the liquid dispenser to wet the roller brush; the surface cleaning device is configured such that, at or after the liquid supply pump is de-energized, the liquid pump drive motor drives the liquid pump to run in reverse. Optionally, a liquid supply pump associated with a liquid dispenser is included, which is energized during operation of the surface cleaning device to dispense cleaning liquid to the roller brush through the liquid dispenser to wet the roller brush; the surface cleaning device is configured to de-energize the liquid pump drive motor at the same time as or after the liquid supply pump is de-energized. Optionally, a one-way valve is installed on the pipeline from the air pump to the gas-liquid mixing chamber to prevent liquid or foam from entering the air pump in reverse. Optionally, the foam outlet is located in front of the roller brush; Optionally, the foam outlet is located inside the brush cavity and adjacent to the brush, or the foam outlet is located outside the brush cavity and adjacent to the brush cavity.

3. A control method of a surface cleaning device, characterized in that, The surface cleaning equipment includes: The roller brush is configured to agitate and pick up dirt from the floor surface to be cleaned; A liquid dispenser, located within the roller brush chamber, is configured to dispense cleaning liquid to at least one of the roller brush and the floor surface to be cleaned. Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: a foam generation component receiving a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the forward direction.

4. A control method of a surface cleaning device, characterized by, The surface cleaning equipment includes: The roller brush is configured to agitate and pick up dirt from the floor surface to be cleaned; A liquid dispenser, located within the roller brush chamber, is configured to dispense cleaning liquid to at least one of the roller brush and the floor surface to be cleaned. Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: the foam generating component receiving a shutdown signal; The liquid pump drive motor is de-energized or the liquid pump drive motor is instructed to drive the liquid pump in reverse, while the air pump drive motor remains energized. After the second timer expires, the air pump drive motor is de-energized.

5. A control method of a surface cleaning device, characterized in that, The surface cleaning equipment includes: A roller brush, and a roller brush motor associated with the roller brush; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: energizing a roller brush motor to drive the roller brush to agitate and pick up dirt from the floor surface to be cleaned; The foam generation component receives a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the positive direction; The liquid pump drive motor is de-energized at the same time as or after the roller brush motor is de-energized.

6. A control method of a surface cleaning device, characterized in that, The surface cleaning equipment includes: A roller brush, and a roller brush motor associated with the roller brush; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: energizing a roller brush motor to drive the roller brush to agitate and pick up dirt from the floor surface to be cleaned; The foam generation component receives a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the positive direction; At the same time or after the roller brush motor is de-energized, the liquid pump drive motor drives the liquid pump to run in reverse, and is de-energized after a third timer period of reverse running.

7. A control method of a surface cleaning device, characterized in that, The surface cleaning equipment includes: The roller brush is configured to agitate and pick up dirt from the floor surface to be cleaned; Liquid distributor and the liquid supply pump associated with the liquid distributor; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: energizing a liquid supply pump to dispense cleaning fluid to the roller brush via the liquid dispenser to wet the roller brush; The foam generation component receives a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the positive direction; The pump drive motor is de-energized at the same time as or after the liquid supply pump is de-energized.

8. A control method of a surface cleaning device, characterized in that, The surface cleaning equipment includes: The roller brush is configured to agitate and pick up dirt from the floor surface to be cleaned; Liquid distributor and the liquid supply pump associated with the liquid distributor; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: energizing a liquid supply pump to dispense cleaning fluid to the roller brush via the liquid dispenser to wet the roller brush; The foam generation component receives a start signal; The air pump drive motor is energized while the liquid pump drive motor is de-energized. After the first timer period, the liquid pump drive motor is energized and instructed to drive the liquid pump in the positive direction; At the same time or after the liquid supply pump is de-energized, the liquid pump drive motor drives the liquid pump to run in reverse, and the pump is de-energized after a fourth timer period of reverse operation.

9. A control method of a surface cleaning device, characterized in that, The surface cleaning device includes: a roller brush, and a roller brush motor associated with the roller brush to drive the roller brush to rotate. A liquid dispenser and a supply pump associated with the liquid dispenser to provide cleaning fluid to the roller brush; Foam generation components, including: An air pump, which is connected to the atmosphere, is used to transport gas; A liquid pump, which is connected to a cleaning fluid storage chamber, is used to transport liquid; An air pump drive motor is used to drive the operation of the air pump; A liquid pump drive motor is used to drive the liquid pump to run in the forward or reverse direction; as well as A gas-liquid mixing chamber is provided, wherein the gas pump and the liquid pump are respectively connected to the gas-liquid mixing chamber through pipelines, so that the gas-liquid mixing chamber can receive the gas generated by the gas pump and the liquid generated by the liquid pump, and mix the gas and liquid in the gas-liquid mixing chamber. The foam outlet is connected to the gas-liquid mixing chamber to output foam to the surface to be cleaned or the roller brush; The method includes: placing the surface cleaning device on a self-cleaning tray; A self-cleaning start signal is sent to the surface cleaning device to initiate a self-cleaning cycle; A start signal is sent to the foam generating component to initiate the foam self-cleaning sub-cycle; During the foam self-cleaning sub-cycle, the liquid supply pump remains de-energized.

10. The method of claim 9, wherein, At the same time or after the foam generating component receives the start signal, the liquid supply pump is de-energized.

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