A lightweight surface cleaning device

Abstract

The application discloses a light surface cleaning device, which comprises a ground brush acting on a surface to be cleaned, a machine body hinged with the ground brush, a clean water tank, a sewage tank and a power source system arranged on the machine body, the power source system comprising a battery pack and a sewage suction motor for sucking sewage into the sewage tank, the machine body comprising a front cover and a rear cover, a first supporting surface protruding forward being arranged on the lower part of the front cover, the sewage tank being detachably mounted on the first supporting surface and located on the front side of the front cover, the rear cover being buckled on the rear side of the front cover to form a cavity of the machine body, the clean water tank being arranged in the cavity, and the clean water tank at least partially surrounding the sewage suction motor, the clean water tank of the surface cleaning device being built in the machine body, the clean water tank playing a role of water cooling and noise reduction for the sewage suction motor, and the machine body having a reasonable internal space and a compact structure, and being small, light, low-noise and long in service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning appliances, in particular to a surface cleaning device. BACKGROUND

[0002] With the improvement of people's living quality, surface cleaning devices gradually enter people's family life and become common appliances for cleaning floors. In the general industry, surface cleaning devices with water or cleaning liquid for cleaning the surface to be cleaned include a floor brush, a machine body hinged with the floor brush, a liquid supply assembly, and a suction assembly. The floor brush is provided with a cleaning roller and a suction port. The liquid supply assembly includes a water tank, a water pump, and a liquid supply pipeline. The suction assembly includes a suction motor and a suction pipe connected with the suction port and the sewage tank. In the general industry, the sewage tank and the water tank are detachably arranged on the machine body with a handle rod. The machine body is also provided with a power source system including a battery pack and a suction motor. The suction channel and the liquid supply pipeline are arranged in the floor brush and on the machine body. The suction motor in the surface cleaning device generates heat during operation. If the temperature rise of the suction motor is too high, the working performance of the motor will be affected. In order to dissipate heat from the motor, the shell of the motor is either an open structure including an upper and lower support structure or a shell with a plurality of or large ventilation holes for dissipating heat from the motor in the shell. Since the suction motor in the surface cleaning device is generally located above the sewage tank to suck sewage or dirt into the sewage tank through the suction channel, the motor is easily subjected to water vapor or some corrosive gases. Therefore, the motor housing is a closed plastic shell. The center of the upper and lower ends of the motor housing is provided with a bearing chamber with a built-in bearing. The motor shaft extends out of the motor housing from the bearing at one end, and a sealing ring is arranged between the motor shaft and the housing. Therefore, it is difficult to dissipate heat when the temperature of the motor rises, which affects the performance of the motor during operation. In order to solve this problem, most of the scrubbers are provided with heat dissipation structures inside and outside the suction motor. The suction motor is generally arranged in the power source system. Therefore, the power source system occupies a large space, which not only brings difficulty to the design of the cleaning device, but also increases the weight of the surface cleaning machine. In addition, the existing surface cleaning device is large in size and heavy in weight. The water tank is a separate component mounted on the machine body. In addition, it is detachable, and its mounting structure needs to be arranged on the machine body. These all result in a larger space occupied. In addition, if the water tank is not installed in place or due to design errors, the water tank and the machine body do not fit well, and the water tank is easy to vibrate during the operation of the surface cleaning device, thereby causing abnormal noise. At the same time, the water tank and the sewage tank need to have a space to prevent sewage overflow when they are inclined. Therefore, they occupy a larger space, which is the reason why the surface cleaning device is large in size and heavy in weight. Especially when the surface cleaning device is moved to the cleaning seat for automatic cleaning or placed, it is not very convenient for the customer to drag it. In addition, the water tank of the existing surface cleaning device needs to be manually filled by the customer, and the customer cannot control the amount of water added, which brings a bad experience to the customer. SUMMARY

[0003] The present application provides a surface cleaning device with a water tank built in the body, which has reasonable space, compact structure, small size, low noise and long service life.

[0004] To achieve the above object, the present application is implemented by the following technical scheme: a lightweight surface cleaning device, comprising a ground brush acting on a surface to be cleaned, a body hinged with the ground brush, a water tank, a sewage tank and a power source system arranged on the body, the power source system comprising a battery pack and a sewage suction motor for sucking sewage into the sewage tank, the body comprising a front cover and a rear cover, a first supporting surface protruding forward is arranged on the lower part of the front cover, the sewage tank is detachably mounted on the first supporting surface and located on the front side of the front cover, the rear cover is buckled on the rear side of the front cover to form a cavity of the body, the water tank is arranged in the cavity, and the water tank is at least partially arranged around the sewage suction motor.

[0005] Further, the water tank is a pipeline arranged through the cavity, the power source system is located in the cavity of the body, the sewage suction motor is located on one side of the water tank and above the sewage tank, and the shell of the sewage suction motor is attached to the side wall of the pipeline.

[0006] Further, the power source system is detachably arranged on the body, the power source system comprises a shell, the battery pack and the sewage suction motor are built in the shell, the sewage suction motor is located in the lower part of the shell, the water tank is arranged through the cavity, the side wall of the water tank is surrounded by a part of the front cover, and the lower part of the shell is at least partially attached to the side wall of the water tank.

[0007] Further, the water tank comprises a vertical part penetrating through the body and a horizontal part connected thereto, the horizontal part is provided with a positioning cavity, the power source system is located in the cavity of the body, and the shell of the sewage suction motor is at least partially located in the positioning cavity; the water tank comprises a vertical part penetrating through the body and a horizontal part connected thereto, the horizontal part is provided with a positioning cavity, the power source system is detachably arranged on the water tank, the power source system comprises a shell, the battery pack and the sewage suction motor are built in the shell, the sewage suction motor is located in the lower part of the shell, and the lower part of the shell is at least partially located in the positioning cavity.

[0008] Further, an air suction channel is arranged at the center of the positioning cavity, the sewage tank is arranged below the horizontal part, the air suction channel is sealed and connected to the upper end of the air suction channel, and the lower end of the air suction channel is sealed and communicated with the air hole of the sewage tank.

[0009] Further, the cavity is provided with a positioning part, a suction passage is arranged at the center of the positioning part, the power source system is arranged on the positioning part, a sewage tank is arranged below the positioning part, and a cold air suction port of the power source system is in sealing butt joint with the upper end of the suction passage, and the lower end of the suction passage is in sealing communication with a ventilation hole of the sewage tank.

[0010] Further, the power source system is fixed in the cavity, the clean water tank comprises a vertical part penetrating the machine body and a horizontal part connected with the vertical part, the horizontal part is located above the power source system, the lower surface of the horizontal part is at least attached to the shell of the battery pack, the vertical part surrounds the power source system, and the shell of the suction motor is attached to the side wall of the vertical part.

[0011] Further, the positioning part is further provided with an exhaust cavity, the exhaust cavity is located at the periphery of the suction passage and is isolated from the suction passage, the upper end of the exhaust cavity is in communication with an air outlet hole of the power source system, and the lower end of the exhaust cavity is in communication with the cavity.

[0012] Further, the vertical part comprises a front cover and a surrounding plate buckled on the front cover, the bottom of the rear cover is provided with a bottom plate protruding forward, and the surrounding plate is in sealing connection with the bottom plate, the front cover and the horizontal part to form a water storage space of the water tank.

[0013] Further, the cavity is further provided with an exhaust passage, the exhaust passage is arranged below the water tank, the inlet of the exhaust passage is arranged at the upper part of the machine body, the inlet of the exhaust passage is in communication with the air outlet hole on the power source system, the outlet of the exhaust passage is arranged at the lower part of the machine body and is arranged towards the floor brush, or the cavity is further provided with an exhaust passage, the exhaust passage is arranged below the water tank, the inlet of the exhaust passage is arranged at the upper part of the machine body, the inlet of the exhaust passage is in communication with the air outlet hole on the power source system, the outlet of the exhaust passage is arranged at the lower part of the machine body and is arranged corresponding to the gap between the machine body and the sewage tank.

[0014] The effects of the above technical solutions include:

[0015] 1. The technical solution of this invention describes a machine body comprising a front cover and a rear cover. The lower part of the front cover has a first supporting surface extending forward. The wastewater tank is detachably mounted on the first supporting surface and located on the front side of the front cover. The suction motor is located above the wastewater tank. The rear cover is fastened to the rear side of the front cover to form a cavity within the machine body. The clean water tank is housed within this cavity, eliminating the need for disassembly and reassembly of the clean water tank. This reduces the number of interfaces between the clean water tank and the machine body, allowing for smoother water flow and reducing the possibility of leakage at the clean water tank interface. Furthermore, if the machine body is equipped with a... With the water tank connected to the inlet, customers no longer need to carry the water tank to add water, making water addition not only convenient but also easy to automate. At the same time, this structure reduces the overall size and weight of the machine body while keeping the capacity of the clean water tank and waste water tank unchanged. Furthermore, the structure of the clean water tank does not affect the design of the machine body, making reasonable use of space. This not only allows the machine body to be made smaller, thus achieving lightweight and miniaturized design, but also allows for increasing the capacity of the clean water tank and waste water tank while maintaining a reasonable size and weight, achieving lightweight design. Furthermore, the clean water tank being fixed inside the machine body increases the machine's counterweight, balancing the center of gravity of the machine body and the wastewater tank. This results in minimal shifts in the machine's center of gravity as wastewater increases, preventing customers from experiencing instability and enhancing ease of use. It also prevents imbalances caused by shifts in the wastewater tank's center of gravity, ensuring stable operation and easy cleaning. After use, it's easy to move to the cleaning seat, and the water inlet's location on the machine body allows for convenient automatic water refilling. Additionally, since the power source system is typically located in the machine body, its air ducts either exhaust from the bottom of the machine or through a structure on the machine body that drains from the gap between the wastewater tank and the machine body. By placing the clean water tank inside the machine body, no disassembly is required, ensuring a smooth and safe operation. The installation is more stable and reliable, without vibration. During the air exhaust process, the clean water tank at least partially surrounds the suction motor. The additional clean water tank and the water inside it absorb and isolate the air, resulting in lower noise and a better customer experience for the surface cleaning device. In addition, since the clean water tank at least partially surrounds the suction motor, it provides water cooling for the suction motor, ensuring a safe working environment for the suction motor and electrical components in the power source system. This eliminates the need for complex cooling and heat dissipation structures within the power source system, simplifying the power source system and its integration with the machine body. This allows for a more compact internal space, further reducing the machine's size and weight, making the surface cleaning device lighter, more stable, more efficient, quieter, and providing a better user experience.

[0016] 2. By setting the clean water tank as a pipe that runs through the cavity, the power source system is located inside the cavity of the machine body, and the sewage suction motor is located on one side of the clean water tank. The outer shell of the sewage suction motor is attached to the side wall of the clean water tank. This allows the clean water tank to cool down the motor or battery pack and other electrical components in the power source system, ensuring the working environment temperature of these components and thus ensuring their good performance. In addition, the sewage suction motor is surrounded by the clean water tank, and the outer shell of the sewage suction motor is attached to the clean water tank. The heat generated by the sewage suction motor during operation can be absorbed and dissipated by the clean water tank, making the cooling effect of the sewage suction motor better. This ensures the working environment of the electrical components in the power source system, allowing the sewage suction motor to work well and reducing insulation aging caused by temperature rise, which is equivalent to extending the service life of the sewage suction motor. At the same time, the airflow noise generated by the sewage suction motor during suction and exhaust is isolated and absorbed by the clean water tank, further reducing the working noise of the surface cleaning device.

[0017] 3. By detachably mounting the power source system on the front of the machine body, the power source system includes a housing, with the battery pack and suction motor built into the housing. When the power source system is removed, it can be combined with the dust cup to form a vacuum cleaner, mite remover, etc., for dry cleaning, achieving multiple functions. The clean water tank is installed through the cavity, with its side wall surrounded by a part of the front cover. The suction motor is located at the lower part of the housing, and the lower part of the housing is at least partially in contact with the side wall of the clean water tank, ensuring the stability and good positioning of the power source system installed on the machine body. This further ensures the fit between the power source system and the clean water tank, thus ensuring that the clean water tank surrounds the suction motor, ensuring better cooling and heat dissipation of the suction motor, and better noise isolation. It also ensures that the clean water tank can effectively isolate the noise of the suction motor during exhaust, resulting in lower noise. This structure is more compact, making the machine body lighter and simpler in both appearance and actual use. At the same time, this surface cleaning device also operates with less noise, resulting in a better customer experience.

[0018] 4. The clean water tank includes a vertical portion penetrating the body and a horizontal portion connected thereto, the horizontal portion having a positioning recess, the power source system being located within the body cavity, and the housing of the suction motor being at least partially located within the positioning recess; or, the clean water tank includes a vertical portion penetrating the body and a horizontal portion connected thereto, the horizontal portion having a positioning recess, the power source system being detachably mounted on the clean water tank, the power source system including a housing, the battery pack and the suction motor being built into the housing, the suction motor being located at the lower part of the housing, and the lower part of the housing being at least partially located within the positioning recess. This structure further ensures that the clean water tank occupies a small amount of space in the machine body, yet has a large enough capacity. Moreover, this structure allows the suction motor to be located in the positioning recess, ensuring the fixed positioning of the suction motor while further improving the cooling and heat dissipation effect of the clean water tank, as well as the isolation and noise reduction effect, whether the power source system is detachable or fixed in the machine body. Of course, if the power source system is fixed in the machine body and is set in close contact with the clean water tank, the cooling and heat dissipation effect and noise reduction effect will be even better.

[0019] 5. By setting a suction channel in the center of the positioning cavity, and placing the sewage tank below the horizontal part, the cold air intake of the power source system is sealed and connected to the upper end of the suction channel, and the lower end of the suction channel is sealed and connected to the vent of the sewage tank. This makes reasonable use of the machine space, ensures smooth suction, and shortens the air path, reducing the possibility of air leakage. This guarantees the suction power of the sewage suction motor for sewage or waste, improves the working performance and efficiency of the sewage suction motor, and ensures the sewage suction effect of the sewage suction motor.

[0020] 6、By setting the positioning part in the cavity, the center of the positioning part is provided with an air suction channel, the power source system is arranged on the positioning part, a sewage tank is arranged below the positioning part, the cold air suction port of the power source system is in sealing butt joint with the upper end of the air suction channel, the lower end of the air suction channel is in sealing communication with the air hole of the sewage tank, and the positioning part is further provided with an exhaust cavity. The exhaust cavity is located outside the air suction channel and is isolated from the air suction channel. The upper end of the exhaust cavity is in communication with the air outlet hole of the power source system, and the lower end of the exhaust cavity is in communication with the cavity. When the surface cleaning is in operation, under the suction of the sewage suction motor, the airflow in the sewage tank can enter the air suction channel through the air hole, and then enter the power source system, so that negative pressure is generated in the water tank and the sewage suction channel, so that the sewage or sewage is sucked into the sewage tank through the suction port and the sewage suction channel. The machine body space is reasonably utilized, the air suction channel is smooth, the air running path is short, the possibility of air leakage is reduced, the suction of the sewage suction motor to the sewage or sewage is ensured, the working performance and efficiency of the sewage suction motor are improved, and the sewage suction effect of the sewage suction motor is ensured. At the same time, the air entering the power source system is cooled, and then discharged through the air outlet hole of the power source system. The exhaust cavity in communication with the air outlet hole enters the cavity of the machine body, and is discharged through the exhaust port arranged on the machine body. The structure is simple, and the power source system is fixed, so that the power source system does not shake during operation, the possibility of noise caused by vibration is avoided, and the air suction channel and the exhaust cavity are surrounded in the positioning part to form a sound insulation cavity, further reducing noise.

[0021] 7、By fixing the power source system in the cavity, the clean water tank comprises a vertical part penetrating the machine body and a horizontal part connected thereto. The horizontal part is located above the power source system, and the lower surface of the horizontal part is at least in contact with the shell of the battery pack. The vertical part surrounds the power source system, and the shell of the sewage suction motor is in contact with the side wall of the vertical part. Such structure increases the contact area of the clean water tank and the power source system, especially the sewage suction motor, and the contact effect of the vertical part and the shell of the sewage suction motor, so as to better cool and heat the sewage suction motor, and the working efficiency of the sewage suction motor is high. The suction effect is better, the power source system is surrounded by the clean water tank in multiple directions, so that the sound insulation and noise reduction effect of the surface cleaning device is better, and such structure also better utilizes the space in the machine body, so that the structure in the machine body can be better designed, and the customer can add water to the clean water tank or set and use the automatic water adding function of the surface cleaning device. The surface cleaning device is more portable and convenient to use, has low noise, and has better experience.

[0022] 8. The vertical part comprises a front cover and a coaming buckled on the front cover, the bottom of the rear cover is provided with a bottom plate extending forward, the coaming is sealingly connected with the bottom plate, the front cover and the horizontal part to form the water storage space of the water tank; or the vertical part comprises a rear cover and a coaming buckled on the rear cover, the bottom of the rear cover is provided with a bottom plate extending forward, the lower end of the coaming is sealingly connected with the bottom plate, and the upper end of the coaming is sealingly connected with the horizontal part, and the rear cover, the coaming, the bottom plate and the horizontal part form the water storage space of the water tank. Such structure is simple and easy to process and form, can increase the capacity of the clean water tank, that is, the water storage space, greatly saves the space of the machine body while ensuring the overall volume of the machine body to be reduced; and ensures that the clean water tank wraps the sewage suction motor, thereby facilitating the cooling and heat dissipation of the sewage suction motor and the entire power source system and the noise reduction of the surface cleaning device during operation.

[0023] 9. The cavity is also provided with an exhaust channel, the exhaust channel is arranged below the water tank, the inlet of the exhaust channel is arranged at the upper part of the machine body, the inlet of the exhaust channel is communicated with the air outlet hole on the power source system, and the outlet of the exhaust channel is arranged at the lower part of the machine body and faces the floor brush; or the cavity is also provided with an exhaust channel, the exhaust channel is arranged below the water tank, the inlet of the exhaust channel is arranged at the upper part of the machine body, the inlet of the exhaust channel is communicated with the air outlet hole on the power source system, and the outlet of the exhaust channel is arranged at the lower part of the machine body and corresponds to the gap between the machine body and the sewage tank. Such structure enables the air in the power source system to be exhausted, thereby ensuring the suction force of the sewage suction motor, prolonging the exhaust distance, enabling the energy of the air to be continuously absorbed and weakened in the exhaust process, and further reducing the noise during exhaust, thereby greatly improving the experience of customers. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a split schematic view of the sewage tank of the surface cleaning device and the machine body according to the present application;

[0025] Figure 2 is Figure 1 is a sectional view of the sewage tank mounted on the machine body of the surface cleaning device in the embodiment;

[0026] Figure 3 is Figure 2 is a schematic view of the flow direction of air in the machine body and a partial structure enlarged view of part of the structure;

[0027] Figure 4 is Figure 2 is a sectional view of A-A in the embodiment;

[0028] Figure 5 is another embodiment of the clean water tank and the installation of the machine body;

[0029] Figure 6 is a sectional view of the surface cleaning device of Example Two;

[0030] Figure 7 is a schematic view of the power source system detachably arranged on the body of the surface cleaning device of Example Two;

[0031] Figure 8 is a schematic view of the surface cleaning device of Example Two; Figure 7 is a schematic view of the sewage tank, the power source system and the body of the surface cleaning device of Example Two;

[0032] Figure 9 is a sectional view of the surface cleaning device of Example Three; Figure 7

[0033] Figure 10 is a sectional view of the surface cleaning device of Example Four;

[0034] Figure 11 is a schematic view of the sewage tank, the power source system and the body of the surface cleaning device of Example Five;

[0035] Figure 12 is a sectional view of the surface cleaning device of Example Five.

[0036] Wherein the reference numerals are as follows:

[0037] 10, body; 101, bearing surface; 102, water outlet; 103, front cover; 1031, surrounding edge; 104, rear cover; 105, cavity; 106, water inlet; 107, top plate; 108, bottom plate; 109, containing cavity; 1091, lower surface; 11, power source system; 111, battery pack; 112, sewage suction motor; 1121, shell; 113, housing; 114, air suction port; 115, air outlet hole; 116, motor chamber; 12, clean water tank; 121, side wall; 122, water filling channel; 123, vertical part; 124, horizontal part; 1241, lower annular housing; 125, positioning concave cavity; 126, extension part; 127, surrounding plate; 128, top wall; 129, bottom wall; 13, sewage tank; 131, sewage inlet pipe; 132, air hole; 14, positioning part; 141, positioning ring; 142, air suction channel; 145, air exhaust cavity; 15, protruding part; 16, gap; 17, air inlet; 18, air outlet; 19, air outlet; 20, floor brush; 21, cleaning roller; 91, handle rod; 92, hand grip; 93, handle; 30, hinged seat; 40, sealing cover; 50, cover plate. DETAILED DESCRIPTION

[0038] ​It should be noted that all the direction indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications will also change accordingly. In the present application, unless otherwise clearly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] As the surface cleaning device described in the present application, such as Figures 1 to 12As shown, including the ground brush 20 acting on the surface to be cleaned, with the ground brush 20 hinge body 10, the body 10 is provided with a power source system 11, clean water tank 12, sewage tank 13, the power source system 11 on the body 10 includes battery pack 111 and the sewage suction motor 112 for pumping sewage into the sewage tank, sewage tank 13 and body 10 by buckle connection, the ground brush 20 is provided with a scraping strip (not marked in the figure) for cleaning the ground cleaning roller 21 and the water supply port, the sewage suction port in communication with the clean water tank 12, the sewage suction port is located at the rear side of the cleaning roller 21 (not shown in the figure), the scraping strip is arranged above the cleaning roller 21 and is in interference fit with the cleaning roller 21, the lower end of the sewage tank 13 is communicated with the sewage suction port (not shown in the figure) through the sewage suction pipe (not shown in the figure), the sewage tank 13 is provided with a vent 132 communicated with the power source system 11. The sewage tank 13 is provided with an inlet pipe 131 extending upward from the bottom wall, the cleaning roller 21 is in wiping contact with the ground when rotating to remove the dirt on the ground and carry the sewage, the scraping strip scrapes the sewage on the roller brush, the sewage suction port is used to suck the scraped sewage and enter the sewage tank 13 through the sewage suction pipe. The body 10 is provided with a power source system, a clean water tank 12 and a sewage tank 13, the body 10 includes a front cover 103 and a rear cover 104, the lower part of the front cover 103 extends forward to form a first supporting surface 101, the sewage tank 13 is detachably mounted on the first supporting surface 101 and located in the front cover 103, the front cover 103 is buckled with the rear cover 104 to form a cavity 105, and the clean water tank 13 is arranged in the cavity 105. Such structure, without disassembling and mounting the clean water tank 12, reduces the interface of the clean water tank 12 and the body 10, so as to reduce the possibility of water leakage of the clean water tank 12 at the interface, and the water flow is more smooth. If a water filling port is arranged on the body 10 and communicated with the clean water tank 12, the customer does not have to carry the water tank to fill water, which is not only convenient but also easy to realize automatic control. Under the condition that the capacity of the clean water tank and the sewage tank remains unchanged, the overall volume of the body is reduced, and the overall weight of the body is reduced. At the same time, the structure of the clean water tank does not affect the modeling design of the body, reasonably utilizes the space, not only makes the body smaller, but also increases the capacity of the clean water tank and the sewage tank, and the body still maintains reasonable volume and weight, achieving lightweight.In addition, the clean water tank 12 is arranged in the machine body 10 and fixed therein, which can increase the weight of the machine body 10, balance the gravity centers of the machine body and the sewage tank, so that the gravity center of the machine body 10 changes little with the increase of the sewage in the sewage tank, and the customer does not feel unstable. In addition, the use of the customer is convenient, and the imbalance of the machine body caused by the change of the gravity center of the sewage tank does not occur. When working, the use is stable, and cleaning is convenient. When use is completed, the mop is dragged to the cleaning seat, and the mop is light and easy to add water. In addition, the water inlet is arranged on the machine body, which can realize automatic water adding on the cleaning seat. In addition, the power source system is generally arranged on the machine body. The air duct of the power source system is arranged in the machine body and discharged from the bottom of the machine body, or discharged from the gap between the sewage tank and the machine body through a structure on the machine body. The clean water tank arranged in the machine body does not need to be disassembled and installed stably and reliably, and does not produce vibration. During the air discharge process, the clean water tank at least partially surrounds the sewage suction motor, and the clean water tank and the water therein further have the functions of absorbing and isolating the air, so that the noise of the surface cleaning device is lower, and the customer experience is better. The sewage suction motor 112 is located above the sewage tank 13, and the clean water tank 12 is at least partially arranged around the sewage suction motor 112. In addition, since the clean water tank at least partially surrounds the sewage suction motor, the sewage suction motor is cooled and cooled, which ensures the working environment of the sewage suction motor and the electrical devices in the power source system, and does not need to arrange a complex cooling and heat dissipation structure in the power source system. The structure of the power source system and the machine body is simple, the space in the machine body is more compact, the machine body space and weight are further reduced, the surface cleaning device is more portable, the work is more stable and efficient, the noise is low, and the experience is good.

[0040] The technical solutions of the present application will be described in detail below with reference to specific embodiments.

[0041] Embodiment one:

[0042] As the surface cleaning device described in the present application, such as Figures 1 to 4As shown, the body 10 includes a front cover 103 and a rear cover 104, the lower part of the front cover 103 extends forward to form a first supporting surface 101, the sewage tank 13 is detachably mounted on the first supporting surface 101 and located in the front cover 103, the rear cover 104 is buckled on the rear side of the front cover 103 to form a cavity 105 of the body, the left and right ends of the front cover 103 are provided with forward surrounding edges 1031, the clean water tank 13 is arranged in the cavity 105 and located in the surrounding edges 1031 of the front cover 103, the clean water tank 12 at least partially surrounds the sewage suction motor 112, and the sewage suction motor 112 is located above the sewage tank 13. The clean water tank 12 is arranged through the cavity 105, in the embodiment, the power source system 11 is located in the cavity 105 of the body 10, the sewage suction motor 112 is located on one side of the clean water tank 12, the shell 1121 of the sewage suction motor 112 is attached to the side wall of the clean water tank 12, the depth of the clean water tank is h, the height of the body is H, and 0.8≤h / H<1. In the embodiment, the value of h / H is 0.9, the space in the body is more reasonably utilized, a larger area of cleaning water can be realized, at the same time, the clean water tank is higher, the center of gravity can be reasonably and uniformly transferred, the center of gravity will not suddenly change due to the change of water flow, so that the use is unstable, at the same time, the contact area of the clean water tank and the power source system is ensured, so that the power source system is better cooled and radiated.

[0043] In the embodiment, as shown in FIG. 1, the body 10 is provided with a front cover 103 and a rear cover 104, the lower part of the front cover 103 extends forward to form a first supporting surface 101, the sewage tank 13 is detachably mounted on the first supporting surface 101 and located in the front cover 103, the rear cover 104 is buckled on the rear side of the front cover 103 to form a cavity 105 of the body, the left and right ends of the front cover 103 are provided with forward surrounding edges 1031, the clean water tank 13 is arranged in the cavity 105 and located in the surrounding edges 1031 of the front cover 103, the clean water tank 12 at least partially surrounds the sewage suction motor 112, and the sewage suction motor 112 is located above the sewage tank 13. Figures 2 to 4As shown, the clean water tank 12 is a pipeline arranged through the cavity 105, the cross section of the pipeline is crescent, the machine body 10 is further provided with a water inlet 106, the upper end of the pipeline is communicated with the water inlet 106 and connected. The hinge seat 30 is arranged between the machine body 10 and the floor brush 20, the hinge seat 30 is provided with a adapter pipe (not shown in the figure), the machine body bottom is provided with a through hole, the pipeline can pass through the through hole and be communicated and connected with the adapter pipe, the adapter pipe is communicated with the liquid injection port (not shown in the figure) on the floor brush 20. The clean water tank is located in the cavity 105, the upper part of the front cover 103 is provided with a containing cavity which is arranged protruding forward and upward, the containing cavity 109 is communicated with the cavity 105, the suction motor 112 and the battery pack 111 are located in the containing cavity 109, the containing cavity 109 is provided with a positioning part 14, the suction motor 112 is installed on the positioning part 14 through the shell 1121, the positioning part 14 is arranged above the sewage tank 13, the center of the positioning part 14 is provided with a air suction passage 142, the air suction passage 142 is provided with an air exhaust cavity 145 in the periphery, a plurality of air inlets 17 are arranged on the upper end surface of the positioning part 14, the air inlets 17 are arranged in the periphery of the air suction passage 142 and communicated with the air exhaust cavity 145, the air inlets 17 are sealed and connected with the air outlet hole 115 on the shell 1121 of the suction motor 112 and communicated, the lower end of the air exhaust cavity 145 is provided with an air outlet 18, the lower part of the front cover 103 is provided with a gap 16 between the side wall of the clean water tank 12, the gap 16 is communicated with the air outlet 18 of the air exhaust cavity 145, the lower end of the front cover 103 is provided with an air exhaust port 19 which is communicated with the outside through the gap 16. The shell 1121 of the suction motor 112 is provided with a cold air suction port 114 in the center, the cold air suction port 114 is sealed and connected with the upper end of the air suction passage 142 and communicated, the lower end of the air suction passage 142 is sealed and communicated with the air hole 132 on the sewage tank 13.

[0044] In the embodiment, the lower end of the rear cover 104 is provided with a bottom plate 108 which protrudes forward (the bottom plate can also be integrally formed with the rear cover 104), the upper end of the rear cover is provided with a top plate 107 which protrudes forward, as Figure 3As shown, the clean water tank 12, i.e. the side wall of the pipeline, extends downward to the bottom plate 108 of the machine body 10 and is sealingly connected with the bottom plate 108, the top wall and the side wall of the clean water tank are integrally formed, the top wall has a certain gap with the top plate 107, the sewage tank 13 is installed on the supporting surface 101 of the machine body 10, the upper end surface of the sewage tank 13 is arranged obliquely, the power source system 11 is located in the containing cavity 109, the lower surface of the containing cavity 109 is consistent with the oblique angle of the upper end surface of the sewage tank 13, the sewage tank 13 is installed on the supporting surface 101 of the machine body, the upper end surface of the sewage tank 13 is arranged in close contact with the lower surface of the containing cavity 109, and the air suction channel 142 is sealingly communicated with the air hole 132 on the sewage tank 13. The clean water tank 12 is a meniscus-shaped pipeline, i.e. the side wall of the pipeline is two arc surfaces connected with each other, at the communication position between the containing cavity 109 and the cavity 105, the sewage suction motor is arranged on one side of the clean water tank, and the side wall of the pipeline is arranged in close contact with the shell 1121 of the sewage suction motor 112, so that the shell 1121 of the sewage suction motor 112 is partially wrapped. When the surface cleaning device performs the sewage suction work, under the action of the sewage suction motor, the air enters the air suction channel 142 from the air hole 132 in the sewage tank 13, and then enters the shell 1121 of the sewage suction motor 112 from the cold air suction port 114 communicated with the air suction channel 142 to cool the sewage suction motor, so as to form a negative pressure in the sewage suction channel and the sewage tank, and the sewage or the dirt on the surface to be cleaned or the dirt scraped off from the cleaning roller 21 by the scraping strip on the floor brush enters the sewage suction channel from the sewage suction port and enters the sewage suction channel under the suction force of the sewage suction motor, and then enters the sewage tank from the sewage inlet pipe 131; at the same time, the air becomes hot air after flowing in the shell of the sewage suction motor, and is discharged from the air outlet 115 of the shell 1121 of the sewage suction motor 112, enters the air exhaust cavity 145 from the air inlet 17 on the upper end surface of the positioning part 14 through the air outlet 115 on the shell 1121 of the sewage suction motor 112 and the air inlet 17 on the upper end surface of the positioning part 14, and then enters the gap 16 between the front cover 103 and the clean water tank 12 from the air outlet 18 of the air exhaust cavity 145, and is discharged outside the machine body from the air outlet 19 of the front cover 103. The discharged air passes through the gap between the clean water tank and the front cover, so that its energy is continuously absorbed in the cavity of the machine body, and the noise of the air discharged from the air outlet 19 is greatly reduced. At this time, the hot air enters the gap between the front cover and the clean water tank, and runs downward below the sewage tank, and the noise is greatly reduced after the sound absorption and sound insulation of the clean water tank, the machine body front cover and the sewage tank.At the same time, since the shell of the sewage suction motor is accommodated in the accommodating cavity and is attached to the side wall of the clean water tank, the shell of the sewage suction motor is partially wrapped by the clean water tank. When the sewage suction motor is working, a part of the heat generated by the sewage suction motor is directly absorbed by the clean water tank and is transferred to the water in the clean water tank, so that the sewage suction motor is directly cooled. Another part of the heat is transferred from the exhaust cavity 145 into the cavity 105 of the machine body 10, flows through the gap between the clean water tank and the front cover 103 to the exhaust port 19 of the front cover 10, and is discharged into the gap between the sewage tank 13 and the front cover 103. In this process, the hot air is further absorbed by the clean water tank, so that the sewage suction motor is rapidly cooled by water.

[0045] As shown in Figure 2 The machine body 10 is further provided with a handle, which includes a handle rod 91 and a hand grip 92 arranged above the handle rod. The handle rod 91 is inserted into the cavity 105 of the machine body 10, and the lower end of the handle rod 91 is fixedly connected to the rear cover 104. The rear side of the clean water tank 12 is provided with a space for avoiding the handle rod 91, so that the space in the cavity 105 of the machine body 10 is further utilized to store sufficient cleaning water and automatic cleaning water with the smallest space. A water adding channel 122 is arranged on the side wall of the upper part of the clean water tank 12, and the water adding channel 122 extends outwardly to the rear cover 104 of the machine body 10. A water adding port 106 is arranged on the upper part of the rear cover 104 in correspondence. The water adding port 106 is in sealed communication with the water adding channel 122, so that the clean water tank 12 is conveniently filled with water. A sealing cover 40 is buckled on the water adding port 106, so that water does not overflow when the surface cleaning device is working, and the floor brush can be supplied with water in time through the water supply channel. In addition, the side wall of the clean water tank 12 and the rear cover 104 of the machine body 10 can be made of transparent material, so that the water level change can be observed. Alternatively, a water level electrode is arranged in the clean water tank 12, and an alarm is given when the water in the clean water tank 12 is lower than the minimum water level.

[0046] In the embodiment, a water outlet 102 in communication with the liquid spraying port on the floor brush 20 is arranged on the bottom of the machine body. A control valve (not shown in the figure) is arranged at the water outlet 102. The water outlet 102 is arranged on the bottom plate 108. A skirt (not shown in the figure) is arranged around the water outlet 102. The wall of the pipeline is inserted into the skirt, and a sealing ring is arranged between the wall of the pipeline and the skirt.

[0047] It can be understood that the skirt is integrally formed with the bottom plate, the water tank wall of the clean water tank is the side wall of the pipeline, and the skirt is extended upward to form; or the side wall of the pipeline extends to the top plate 107 and is sealingly connected with the top plate 107, and we can set a water inlet on the top of the machine body, that is, set a water inlet on the top plate 107, or we can set a water inlet on the top plate of the machine body, and the water tank top wall is provided with an inlet, the water inlet is in communication with the inlet of the clean water tank and is connected; or the cavity bottom is provided with a water outlet in communication with the liquid injection port on the floor brush, and a control valve is arranged at the water outlet, the water tank wall of the clean water tank is arranged on the periphery of the water outlet and extends upward from the bottom of the machine body to form, the water tank wall extends to the top of the machine body and is sealingly connected with the top of the machine body, the top of the machine body is provided with a water inlet, and the projection of the water inlet on the horizontal plane falls within the clean water tank. The scheme does not deviate from the technical concept of the application, and is within the protection scope of the application, which will not be illustrated one by one here.

[0048] Of course, it can be understood that the handle rod can also be arranged in front of the clean water tank 12, and the handle rod can be inserted into the cavity 105 of the machine body 10 and fixed on the water tank, the rear cover or the front cover, or the cavity wall of the containing cavity through the connecting structure.

[0049] Of course, it can be understood that, as shown in Figure 5 The clean water tank includes a vertical part 123 and a transverse part 124 connected thereto, the transverse part 124 is located in the containing cavity 109 and above the battery pack 111, in the embodiment, the value of h / H is 0.95, the sewage suction motor is arranged on the positioning part 14, the vertical part 123 is still arc-shaped, and the front side of the vertical part 123 is attached to the shell 1121 of the sewage suction motor 112, so that the entire power source system 11 is wrapped by the clean water tank 12, further reducing the temperature rise of the power source system 11, including the battery pack, thereby improving the service life of the power source system, the handle rod 91 is inserted into the cavity 105 of the machine body 10 and arranged behind the clean water tank 12, the rear side of the clean water tank is provided with a space for avoiding the handle rod, and the handle rod 91 is fixed on the rear cover 104 through the connecting structure. Such a structure can store sufficient water in a smaller space. The scheme does not deviate from the technical concept of the application, and is within the protection scope of the application, which will not be illustrated one by one here.

[0050] It can be understood that the exhaust passage is arranged below the clean water tank, the inlet of the exhaust passage is arranged at the upper part of the machine body, the inlet of the exhaust passage is communicated with the air outlet hole on the power source system, the outlet of the exhaust passage and the exhaust port are arranged at the lower part of the machine body and are arranged towards the floor brush 20; or, the exhaust passage is arranged below the clean water tank, the inlet of the exhaust passage is arranged at the upper part of the machine body, the inlet of the exhaust passage is communicated with the air outlet hole on the power source system 11, the outlet of the exhaust passage, i.e. the exhaust port, is arranged at the lower part of the machine body 10 and is arranged corresponding to the gap between the machine body and the sewage tank, the air exhausted from the air outlet hole of the power source system passes through the outlet of the exhaust passage, i.e. the exhaust port, and is blown to the gap between the machine body and the sewage tank, and is run downwards from the gap to the sewage tank below to be exhausted. The schemes which deviate from the technical concept of the present application are within the protection scope of the present application, and will not be exemplified one by one here.

[0051] It can be understood that the clean water tank is integrally formed with the rear cover of the machine body, and the upper part of the machine body is provided with a water filling port communicated with the clean water tank, and a sealing cover is buckled on the water filling port; or the front part of the clean water tank is integrally formed with the front cover, the rear part of the clean water tank is integrally formed with the rear cover, and the front part and the rear part of the clean water tank are sealingly connected to form a water storage space of the clean water tank; or the rear cover is an arc-shaped plate, the clean water tank comprises the rear cover and a surrounding plate buckled with the rear cover, the upper end of the rear cover extends forward to form a top wall of the clean water tank, the lower end of the rear cover extends forward to form a bottom wall of the clean water tank, the bottom wall is provided with a water outlet communicated with the water spraying port, the surrounding plate extends upward from the bottom wall to the top wall, and the top wall is provided with a water filling port, a sealing cover is buckled on the water filling port, and the projection of the water filling port on the horizontal plane falls in the clean water tank; or the front cover is an arc-shaped plate, the clean water tank comprises the front cover and a surrounding plate buckled with the front cover, the upper end of the front cover extends backward to form a top wall of the clean water tank, the lower end of the front cover extends backward to form a bottom wall of the clean water tank, the top wall is provided with a water filling port, a sealing cover is buckled on the water filling port, and the surrounding plate extends downward from the top wall to the bottom wall; or the rear cover is an arc-shaped plate, the clean water tank comprises the front cover and a surrounding plate buckled with the front cover, the upper end of the front cover extends backward to form a top wall of the clean water tank, the lower end of the front cover extends backward to form a bottom wall of the clean water tank, the bottom wall is provided with a water outlet communicated with the water spraying port, the surrounding plate extends upward from the bottom wall to the top wall, the top wall is provided with a water filling port, and a sealing cover is buckled on the water filling port. The schemes which do not deviate from the technical concept of the present application are within the protection scope of the present application, and will not be exemplified one by one here.

[0052] Embodiment two:

[0053] The difference between the present embodiment and embodiment one is the structure of the clean water tank and the position of the clean water tank in the machine body.

[0054] As the surface cleaning apparatus according to the present application, for example, Figure 6As shown, the power source system 11 is located in the accommodating cavity 109 of the machine body 10, the fresh water tank 12 includes a vertical part 123 penetrating the cavity 105 of the machine body and a horizontal part 124 connected with the vertical part 123, the horizontal part 124 is arranged in the accommodating cavity, the vertical part 123 extends upward from the upper surface of the horizontal part 124 to form an extension part 126, in the embodiment, the value of h / H is 0.85. The extension part 126 has a gap 16 with the side wall of the shell of the suction motor, the horizontal part 123 is located below the power source system 11, no positioning part is arranged in the accommodating cavity, the upper surface of the horizontal part 124 is provided with a positioning recess 125, the shell 1121 of the suction motor 112 is at least partially located in the positioning recess 125, the lower part of the suction motor 112 is at least located in the positioning recess 125, the shell 1211 of the suction motor 112 is attached with the wall of the positioning recess 125, that is, attached with the horizontal part, that is, the lower part of the suction motor is wrapped in the horizontal part. The center of the horizontal part 124 is provided with an air suction passage 142, the air suction passage 142 is arranged below the positioning recess 125, so that the horizontal part 124 is a circular ring with a cavity in the center, the side wall of the shell 1121 of the suction motor 112 is provided with an air outlet hole 115, the vertical part 123 has a gap 16 with the rear cover 104, the gap 16 forms an air exhaust passage in the machine body 10, the air outlet hole 115 is communicated with the gap 16, the lower part of the rear cover 104 is provided with an air exhaust port 19, the air exhaust port 19 is the outlet of the air exhaust passage, the hot air passes through the air outlet hole 115 and the air exhaust passage to the air exhaust port 19, and is discharged backward out of the machine body 10 from the air exhaust port 19. In the embodiment, the side wall of the fresh water tank includes a front cover 103 and a surrounding plate 127 buckled on the front cover 103, a part of the side wall of the fresh water tank 12 is composed of the front cover 103, the bottom of the rear cover 104 is provided with a bottom plate 108 protruding forward, the front cover 103 and the surrounding plate 127 are inserted into the bottom plate 108 and are sealingly connected with the bottom plate 108, the surrounding plate 127 and the front cover 103 surround the bottom plate 108 to form the bottom wall 129 of the fresh water tank 12, the top of the front cover 103 is provided with a lower annular shell 1241 protruding forward, a cover plate 50 is arranged on the lower annular shell, the cover plate 50 is sealingly buckled with the lower annular shell 1241 to form the horizontal part 124 of the fresh water tank 12, the horizontal part 124 is connected with the extension part 126 and the vertical part 123, the vertical part 123 includes the front cover 103 and the surrounding plate 127 buckled on the front cover 103, the surrounding plate 127 is sealingly connected with the bottom plate 108, the front cover 103 and the horizontal part 124 to form the water storage space of the fresh water tank 12, and the gap 16 between the surrounding plate 127 and the rear cover 104 forms the air exhaust passage.In the structure, the frame-shaped front cover 103 forms part of the wall of the horizontal portion, and the accommodating cavity of the frame-shaped front cover 103 is used to form the horizontal portion of the clean water tank, thereby saving space, and the clean water tank can cool the sewage suction motor, and forms a noise isolation cavity, thereby reducing noise.

[0055] It can be understood that the sewage suction motor can be directly installed in the positioning cavity, or the positioning portion and the horizontal portion can be both semicircular rings, the positioning portion and the horizontal portion are sealed and connected, and the positioning cavity and the air suction channel are formed by the positioning portion and the horizontal portion. The sewage suction motor is located in the positioning cavity, so that the sewage suction motor is wrapped by the horizontal portion and the positioning portion. The air exhaust channel can be arranged in the positioning portion and communicated with the air exhaust channel in the machine body through the side wall of the positioning portion and discharged from the air exhaust port. Alternatively, the vertical portion can not be provided with the extension portion, the hot air is directly discharged into the cavity through the air outlet hole on the shell of the sewage suction motor, and is discharged from the air exhaust port to the machine body through the air exhaust channel formed by the surrounding plate of the clean water tank and the rear cover. The above-mentioned solutions do not deviate from the technical concept of the present application, and are within the protection scope of the present application, which will not be repeated here.

[0056] The remaining structure and effects of the present example are the same as those of example one, and will not be repeated here.

[0057] Example three:

[0058] The difference between the present example and example two is that the power source system 11 is detachably installed on the machine body 10 as the power source of the surface cleaning device, and can be connected with the dust bucket to be used as a dust collector. In the present example, the value of h / H is 0.95.

[0059] As the surface cleaning device of the present application, such as Figures 7 to 9As shown, the handle is arranged on the power source system, the handle includes a grip 93 and an insertion part (not shown in the figure) arranged at the lower part of the grip, the grip 93 is open, the power source system 11 further includes a shell 113, the battery pack 111 and the sewage suction motor 112 are built in the shell 113, the sewage suction motor 112 is located at the lower part of the shell 113, and the lower part of the shell 113 is at least partially attached to the side wall of the clean water tank 12. The grip 93 is located on the shell 113 and is smoothly connected with the upper part of the shell 13, the insertion part extends into the shell 113 and is fixedly connected with the shell 113 as an integral structure, the power source system 11 is detachably arranged on the machine body and is located at the front side of the front cover 103, the side wall of the transverse part 124 of the clean water tank 12 is surrounded by a part of the front cover 103, the vertical part 123 includes the front cover 103 and the surrounding plate 127 which is buckled on the rear front cover 103, the bottom of the rear cover 104 is provided with a bottom plate 108 which extends forward, the lower end of the surrounding plate 127 is sealingly connected with the bottom plate 108, the upper end of the surrounding plate 127 is sealingly connected with the transverse part 123, and the front cover 103, the surrounding plate 127, the bottom plate 108 and the transverse part 124 form a water storage space of the water tank.

[0060] As in example two, the upper surface of the transverse part 124 is provided with a positioning recess 125 in this embodiment, and the lower part of the shell 113 is at least partially located in the positioning recess 125, so that the sewage suction motor is wrapped by the transverse part. The center of the transverse part 124 is provided with an air suction channel 142, that is, the transverse part is a circular ring, the sewage tank 13 is arranged below the transverse part 124, the cold air suction port 114 of the power source system 11 is sealingly connected with the upper end of the air suction channel 142, the lower end of the air suction channel 142 is sealingly communicated with the air hole 132 of the sewage tank 13, the machine body is provided with a protruding part 15 which protrudes upward from the top wall of the machine body, the vertical part extends upward to form an extension part 126 which extends into the protruding part 15, the side wall of the vertical part 123 has a gap with the inner wall of the protruding part 15, the gap is communicated with the gap between the vertical part and the rear cover to form an exhaust channel in the machine body cavity 105, the side wall of the shell 113 of the power source system 11 is provided with an air outlet hole 115, the protruding part 15 is provided with an air inlet 17, the air outlet hole 115 is sealingly connected with the air inlet 17, the air inlet 17 is communicated with the exhaust channel, the lower part of the rear cover 104 of the machine body 10 is provided with an air outlet 19, the air outlet 19 is the outlet of the exhaust channel, and the hot air is discharged from the air outlet 19.

[0061] The remaining structure and effects of this embodiment are consistent with those of example two, and will not be described here.

[0062] Example four:

[0063] The difference between the present embodiment and Embodiment 2 is that the power source system is detachably arranged on the machine body, and the structures in the fresh water tank and the machine body are different. In the present embodiment, the value of h / H is 0.9.

[0064] As the surface cleaning device of the present application, for example, Figure 10As shown, the front side of the cavity 105 is provided with a containing cavity 109 communicating with the cavity 105, the upper surface of the containing cavity 109 is provided with a positioning recess 125, the lower part of the power source system is located in the positioning recess 125, the power source system 11 includes a battery pack 111, a sewage suction motor 112 and a shell 113, the sewage suction motor 112 is located in the lower part of the shell 113, so that the sewage suction motor 112 is located in the positioning recess 125, the cavity 105 extends upward from the upper surface of the machine body to form a protruding part 15, the containing cavity 109 communicates with the cavity 105 and the protruding part 15, the center of the containing cavity 109 is provided with an air suction passage 142, the upper end of the air suction passage communicates with the cold air suction port 114 of the power source system 11, and the lower end communicates with the air hole 132 of the sewage tank 13, the bottom wall of the containing cavity 109 is inclined, the upper surface of the sewage tank 13 is also inclined, the upper surface of the sewage tank is attached to the bottom wall of the containing cavity, so that the air hole 132 and the air suction passage 142 are sealingly connected, and the sewage suction motor is ensured to perform sewage suction work. The air suction passage 142 is provided with an air exhaust cavity 145 outside, a plurality of air inlets 17 are arranged on the upper end face of the positioning recess, the air inlets 17 are arranged outside the air suction passage 142 and communicate with the air exhaust cavity 145, the air inlets 17 sealingly connect and communicate with the air outlets 115 on the shell 1121 of the sewage suction motor 112, the lower end of the air exhaust cavity 145 is provided with an air outlet 18, the rear cover 104 is also an arc-shaped plate, the clean water tank 12 includes two enclosing plates 127, the enclosing plates 127 are C-shaped, the opening of the C-shaped enclosing plate faces the front side, the two enclosing plates are buckled and sealingly connected front and back to form a water storage area, so that after the power source system 11 is inserted into the machine body 10, the upper part of the enclosing plate and the front wall of the protruding part 15 are integrally formed, or the upper part of the front cover forms part of the front enclosing plate, the clean water tank 12 is wrapped around the lower part of the power source system 11 through the shell of the protruding part 15, and the front enclosing plate is tightly attached to the lower part of the shell 113. The lower end of the rear cover 104 is provided with a bottom plate 108 protruding forward, the enclosing plate 127 extends downward and is inserted into the bottom plate 108, the bottom plate 108 is provided with a water outlet 102, the enclosing plate 127 is located outside the water outlet 102 and surrounds the water outlet 102, the enclosing plate 127 and the rear cover 104 buckled to enclose the bottom plate area form the bottom wall 129 of the water tank, the machine body further includes a top plate 107 extending forward from the rear cover 104, the enclosing plate 127 extends upward to the top plate 107 and is sealingly connected thereto, the enclosing plate and the rear cover buckled to enclose the top plate area form the top wall 128 of the clean water tank 12, the rear enclosing plate is provided with a water adding passage 122, the upper part of the rear cover 104 is provided with a water adding port 106, the water adding passage and the water adding port 106 are sealingly connected, and the water adding port 106 is buckled with a sealing cover 40.The clean water tank extends upwardly and extends into the protrusion 15, the top plate 128 is located below the top wall of the protrusion 15 of the machine body 10, the top wall of the protrusion is the top plate 107, and the surrounding plate, the back cover, the top plate and the bottom plate form a water storage area of the clean water tank. The lower part of the front cover 103 is provided with a gap 16 between the surrounding plate 127 of the clean water tank 12, the gap 16 is communicated with the air outlet 18 of the exhaust cavity 145, the lower end of the front cover 103 is provided with an exhaust port 19 for communicating the exhaust passage with the outside, the exhaust port is the outlet of the exhaust passage, the power source system is installed on the machine body, under the action of the sewage suction motor, the hot air in the shell 113 enters the exhaust cavity 145 from the air outlet hole 115 and the air inlet 17, and is discharged from the air outlet 18 of the exhaust cavity 145 into the exhaust passage, and then is discharged from the exhaust port 19 of the machine body.

[0065] It can be understood that the surrounding plate and the bottom plate can be integrally processed and formed; the top plate can also be integrally formed with the top wall of the protrusion, and the water inlet can also be arranged at the top end of the protrusion. Such a scheme without departing from the technical concept of the present application is within the protection scope of the present application, and will not be repeated here.

[0066] The remaining structure and the generated effect of the embodiment are consistent with those of embodiment two, and will not be repeated here.

[0067] Embodiment five:

[0068] The difference between the present embodiment and embodiment three is that the structure in the machine body is different, in the present embodiment, the value of h / H is 0.8.

[0069] As the surface cleaning device described in the present application, such as Figure 11 and Figure 12As shown, the housing 113 of the power source system of the application partially extends downward to form a motor chamber 116, the sewage suction motor 112 is installed in the motor chamber 116, the clean water tank 12 comprises a vertical part 123 extending through the machine body 10 and a horizontal part 124 connected with the vertical part 123, the machine body 10 is provided with a forward protruding accommodating cavity 109 at the upper portion, the horizontal part 124 is arranged in the accommodating cavity 109, in this embodiment, the wall of the horizontal part 124 is the cavity wall of the accommodating cavity 109, that is, the horizontal part 124 and the accommodating cavity 109 of the machine body are the same, that is, the horizontal section of the horizontal part 124 is a circular ring, the center of which is provided with an air suction channel 142, the cold air suction port 114 of the power source system is sealingly connected with the upper end of the air suction channel 142, the lower end of the air suction channel is sealingly communicated with the air hole 132 of the sewage tank 13, the front cover 103 extends forward and upward to form a circular ring cavity, the circular ring cavity is buckled with a cover plate 50, the front side of the cover plate 50 is provided with a positioning ring 141 extending upward, the rear side of the cover plate 50 is provided with a protruding part 15 extending upward, the vertical part 123 extends upward to form an extension part 126, the horizontal section of the extension part 126 is crescent-shaped, the two end faces of the extension part 15 are arranged towards the front side, the positioning ring 141 and the protruding part 15 form a positioning recess 125 of the power source system, the motor chamber 116 is located in the positioning recess 125, the horizontal part 124 is arranged below the motor chamber 116, the cover plate 50 of the horizontal part 124 and the bottom surface of the motor chamber 116 are attached, the vertical part 123 wraps part of the side wall of the motor chamber 116, the extension part 126 of the vertical part 123 extends into the protruding part 15, the side wall of the motor chamber 116 and the front side wall of the protruding part 15 are attached, the side wall of the motor chamber 116 is provided with an air outlet hole 115, the front wall of the protruding part 15 is provided with an air inlet 17 corresponding thereto, the air inlet 17 is sealingly connected with the air outlet hole 115 and communicated therewith, the vertical part 123 of the clean water tank and the front wall of the protruding part 15 have a gap 16, the gap 16 is communicated with the air exhaust channel in the machine body, the lower portion of the rear cover 104 is provided with an air outlet 19, that is, the outlet of the air exhaust channel, so as to make the hot air of the power source system enter the air exhaust channel through the air outlet hole 115 and the air inlet 17, and then be discharged from the machine body through the outlet of the air exhaust channel, that is, the air outlet 19.

[0070] The remaining structure and effects of this embodiment are the same as those of embodiment three, and will not be described here.

[0071] In addition to the preferred embodiments described above, the application also has other embodiments, and the above embodiments can be combined, and those skilled in the art can make various changes and modifications according to the application, as long as they do not deviate from the spirit of the application, they should belong to the scope defined by the claims of the application.

Claims

1. A light-weight surface cleaning device comprising a floor brush acting on a surface to be cleaned, a machine body hinged to the floor brush, the machine body being provided with a clean water tank, a dirty water tank and a power source system, the power source system comprising a battery pack and a dirty water suction motor for sucking dirty water into the dirty water tank, characterized in that, The fuselage comprises a front cover and a rear cover, the lower part of the front cover is provided with a first supporting surface extending forward, the sewage tank is detachably mounted on the first supporting surface and located at the front side of the front cover, the rear cover is buckled at the rear side of the front cover to form a cavity of the fuselage, the clean water tank is arranged in the cavity, and the clean water tank at least partially surrounds the sewage suction motor.

2. The lightweight surface cleaning device of claim 1, wherein, The clean water tank is a pipeline arranged through the cavity, the power source system is arranged in the cavity of the fuselage, the sewage suction motor is arranged on one side of the clean water tank and above the sewage tank, and the shell of the sewage suction motor is attached to the side wall of the pipeline.

3. The lightweight surface cleaning device of claim 1, wherein, The power source system is detachably arranged on the fuselage, the power source system comprises a shell, the battery pack and the sewage suction motor are arranged in the shell, the sewage suction motor is arranged at the lower part of the shell, the clean water tank is arranged through the cavity, and the side wall of the clean water tank is formed by a part of the front cover and at least partially attached to the shell.

4. The lightweight surface cleaning device of claim 1, wherein, The power source system is arranged in the cavity of the fuselage, the clean water tank comprises a vertical part arranged through the fuselage and a horizontal part connected with the vertical part, the upper surface of the horizontal part is provided with a positioning recess, and the shell of the sewage suction motor is at least partially arranged in the positioning recess; or the clean water tank comprises a vertical part arranged through the fuselage and a horizontal part connected with the vertical part, the upper surface of the horizontal part is provided with a positioning recess, the power source system is detachably arranged on the fuselage, the power source system comprises a shell, the battery pack and the sewage suction motor are arranged in the shell, the sewage suction motor is arranged at the lower part of the shell, and the lower part of the shell is at least partially arranged in the positioning recess.

5. The lightweight surface cleaning device of claim 4, wherein, The center of the positioning recess is provided with an air suction channel, the sewage tank is arranged below the horizontal part, the cold air suction port of the power source system is sealingly connected to the upper end of the air suction channel, and the lower end of the air suction channel is sealingly communicated with the air hole of the sewage tank.

6. The lightweight surface cleaning device of claim 1, 2, or 3, wherein, The cavity is further provided with a positioning part, the center of the positioning part is provided with an air suction channel, the power source system is arranged on the positioning part, the sewage tank is arranged below the positioning part, the cold air suction port of the power source system is sealingly connected to the upper end of the air suction channel, and the lower end of the air suction channel is sealingly communicated with the air hole of the sewage tank.

7. The lightweight surface cleaning device of claim 6, wherein, The power source system is fixed in the cavity, the clean water tank comprises a vertical part arranged through the fuselage and a horizontal part connected with the vertical part, the horizontal part is arranged above the power source system, the lower surface of the horizontal part is at least attached to the shell of the battery pack, the vertical part is arranged around the power source system, and the shell of the sewage suction motor is attached to the side wall of the vertical part.

8. The lightweight surface cleaning device of claim 6, wherein, The positioning part is further provided with an air exhaust cavity, the air exhaust cavity is arranged at the periphery of the air suction channel and is isolated from the air suction channel, the upper end of the air exhaust cavity is communicated with the air outlet hole of the power source system, and the lower end of the air exhaust cavity is communicated with the cavity.

9. The lightweight surface cleaning device of either claim 4 or claim 7, wherein, The vertical part comprises a front cover and a coaming buckled on the front cover, the bottom of the rear cover is provided with a bottom plate extending forward, the coaming is sealingly connected with the bottom plate, the front cover and the horizontal part to form a water storage space of the clean water tank; or the vertical part comprises a rear cover and a coaming buckled on the rear cover, the bottom of the rear cover is provided with a bottom plate extending forward, the lower end of the coaming is sealingly connected with the bottom plate, the upper end of the coaming is sealingly connected with the horizontal part, and the rear cover, the coaming, the bottom plate and the horizontal part form a water storage space of the clean water tank.

10. The lightweight surface cleaning device of claim 1, 2, 3, or 4, wherein, The cavity is also provided with an exhaust channel, the inlet of the exhaust channel is arranged at the upper part of the machine body, the inlet of the exhaust channel is communicated with the air outlet hole on the power source system, the outlet of the exhaust channel is arranged at the lower part of the machine body and faces the floor brush, or the cavity is also provided with an exhaust channel, the inlet of the exhaust channel is arranged at the upper part of the machine body, the inlet of the exhaust channel is communicated with the air outlet hole on the power source system, and the outlet of the exhaust channel is arranged at the lower part of the machine body and corresponds to the gap between the machine body and the sewage tank.

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