CN113925394A

CN113925394A - Water supply system and floor cleaning device

Info

Publication number: CN113925394A
Application number: CN202111247900.2A
Authority: CN
Inventors: 李光辉; 卢立; 曾国平; 杨冬; 王永高
Original assignee: Dongguan Viper Cleaning Equipment Co Ltd
Current assignee: Dongguan Viper Cleaning Equipment Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-01-14
Also published as: WO2023071815A1

Abstract

The invention relates to a water supply system which comprises a main water tank, wherein the main water tank is of a hollow structure, a first cavity is arranged in the main water tank, a vent hole is formed in the main water tank, a one-way ventilating part is embedded in the vent hole, and the one-way ventilating part is communicated in a one-way mode in the direction from the outside of the main water tank to the first cavity. Among the above-mentioned scheme, through embedding one-way ventilative portion in the air vent of main water tank, make the air vent only in the direction from the main water tank outside to first cavity one-way switch on, make the outside gas can get into first cavity smoothly when the water level descends in the main water tank, make main water tank warp with the atmospheric pressure unbalance of the main water tank outside of avoiding first cavity, can make when first cavity water level rises again, water in the first cavity can't flow from the air vent, avoid the water waste that the water in the first cavity spills over the cause from the air vent.

Description

Water supply system and floor cleaning device

Technical Field

The present invention relates to the field of floor cleaning devices, such as floor sweepers or floor washers.

Background

Taking a floor sweeper or a floor washer as an example, the floor sweeper or the floor washer is used as an integrated garbage sweeper combining sweeping and dust collection, and has been widely applied to sweeping of roads in various large, medium and small cities and various plants by virtue of the advantages of high working efficiency, low cleaning cost, good cleaning effect and the like. Most floor washers all are equipped with water supply system to realize watering or cleaning function.

However, most of the water supply systems of the existing ground cleaning equipment have the defects that the clear water capacity in the ground cleaning equipment is small, the water shortage is easy to occur in the cleaning process, the water adding point needs to be returned for supplementing water for many times, and the cleaning efficiency is low. In addition, the water tank of the existing water supply system also has the problem of water resource waste caused by the fact that water easily overflows from the water tank.

Disclosure of Invention

Based on this, there is a need for a water supply system and a floor cleaning device, which aims to solve the problems of insufficient water and easy overflow of water from a water tank in the floor cleaning device of the prior art.

The application provides a water supply system, including main tank and expansion tank. The main water tank is a hollow structure with a first cavity inside, the main water tank is provided with an air vent, an one-way ventilating portion is embedded in the air vent, and the one-way ventilating portion conducts in one way in the direction from the outside of the main water tank to the first cavity. The auxiliary water tank is of a hollow structure, a second cavity is formed in the auxiliary water tank, the auxiliary water tank is higher than the main water tank, and the auxiliary water tank is communicated with the main water tank.

In the scheme, the water volume of the floor washing machine is increased by arranging the main water tank and the auxiliary water tank, so that the floor washing machine can support the cleaning work for a longer time in the cleaning process, the main water tank and the auxiliary water tank are arranged at a high position and a low position, the position of the ground cleaning equipment in the height direction is reasonably utilized, the structure of the ground cleaning equipment is compact, and the space increase of the ground cleaning equipment caused by the addition of the auxiliary water tank is reduced as much as possible. Still through embedding one-way ventilative portion in the air vent of main water tank, make the air vent only in the one-way conduction in the direction from the main water tank outside to first cavity, make the outside gas can get into first cavity smoothly when the water level descends in the main water tank, make main water tank warp with the atmospheric pressure unbalance of the main water tank outside of avoiding first cavity, can make when first cavity water level rises again, the water in the first cavity can't flow from the air vent, avoid the water waste that the water in the first cavity spills over the cause from the air vent.

The technical solution of the present application is further described below:

in one embodiment, the main water tank is provided with a first water inlet and a first water outlet, the first water inlet is arranged at the top end or the top surface of the side wall of the first cavity, and the first water outlet is arranged at the bottom end or the bottom surface of the side wall of the first cavity.

In one embodiment, the first water inlet is provided with a first end cap, which is sealingly connected to the first water inlet.

In one embodiment, the auxiliary water tank is provided with a second water inlet and a second water outlet, the second water inlet is arranged at the top end or the top surface of the side wall of the second cavity, and the second water outlet is arranged at the bottom end or the bottom surface of the side wall of the second cavity.

In one embodiment, the first water outlet and the second water outlet are provided with valves.

In one embodiment, the first water outlet and the second water outlet are communicated through a water pipe.

In one embodiment, the second water inlet is provided with a second end cap which is wrapped or embedded in the second water inlet and is provided with a hole for ventilation.

In one embodiment, the water supply system further comprises a water pump, and the water pump, the main water tank and the auxiliary water tank are communicated with each other in pairs through water pipes with three-end openings.

In one embodiment, the one-way air-permeable part is a one-way valve made of flexible material.

The present application also provides a floor cleaning appliance comprising a water supply system as described in any one of the above.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a water supply system according to an embodiment of the present invention;

FIG. 2 is a block diagram of the main tank of FIG. 1;

FIG. 3 is an enlarged view of the point A in FIG. 2;

FIG. 4 is a structural view of the auxiliary water tank of FIG. 1;

FIG. 5 is a block diagram of the check valve of FIG. 3;

FIG. 6 is a cross-sectional view of the closed state of the check valve of FIG. 5;

fig. 7 is a cross-sectional view of the on state of the check valve of fig. 5.

Description of reference numerals:

10. a water supply system; 110. a main water tank; 111. a vent hole; 112. a one-way ventilation portion; 1121. a valve body; 1122. a valve core; 1123. a return spring; 113. a first water inlet; 114. a first water outlet; 115. a first end cap; 120. an auxiliary water tank; 121. a second water inlet; 122. a second water outlet; 123. a second end cap; 20. a water pipe; 30. a water pump; 40. and (4) a nozzle.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

At present, a floor cleaning machine is widely applied to cleaning of roads of various large, medium and small cities and various factory buildings. Along with the gradual perfection and enrichment of the structure and functions of the floor washing machine, the floor washing machine is also suitable for more application scenes.

Generally, existing floor washers typically have only a single tank for holding water, and often suffer from insufficient water during sweeping.

In order to solve the problem of insufficient water in the floor cleaning device in the prior art, the inventor finds that the number of the water tanks in the floor cleaning device can be increased to two. And the inner space of the floor cleaning device can be reasonably utilized, so that the two water tanks are separately arranged at different positions of the floor cleaning device, and usually, the two water tanks are not at the same horizontal height, namely, the two water tanks are arranged one above the other.

Generally, the water tank of the existing floor washing machine is generally provided with a vent communicated with the outside. However, in the using process, the car body is shaken due to the uneven road surface in the travelling process of the car washing, so that the water in the water tank is shaken inside the water tank and overflows from the air vent of the water tank, and the water quantity is wasted.

As a method for solving the problem that water is easily overflowed from the water tank, the water tank may be isolated from the outside air by closing the air vent of the water tank, thereby preventing the water from overflowing from the water tank. However, when a large amount of water in the water tank is pumped out, the air pressure inside and outside the water tank is unbalanced, the air pressure outside the water tank is larger than the air pressure inside the water tank, so that the water tank is extruded and deformed, and the water in the water tank is difficult to pump due to the unbalanced air pressure inside and outside the water tank, so that the water in the water tank is difficult to pump, and the cleaning effect of the floor washing machine is influenced.

In order to solve the problem that water is easy to overflow from the water tank, the applicant researches and discovers that a one-way ventilating part can be embedded into a ventilating opening formed in the water tank, so that the ventilating opening can keep the external air of the water tank to enter the water tank through the ventilating opening, and the water in the water tank at a lower position is prevented from overflowing from the ventilating opening.

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, a water supply system 10 for an embodiment of the present application includes a main tank 110 and a sub-tank 120. The main water tank 110 is a hollow structure with a first cavity inside, and the main water tank 110 is provided with a vent hole 111. The ventilation hole 111 is embedded with a one-way ventilation part 112. The one-way ventilation part 112 is in one-way conduction in the direction from the outside of the main water tank 110 to the first cavity. The auxiliary water tank 120 is a hollow structure having a second cavity therein, the auxiliary water tank 120 is higher than the main water tank 110, and the auxiliary water tank 120 is communicated with the main water tank 110.

It will be appreciated that the first cavity is located inside the main tank 110 for storing water. The vent is used to communicate the first cavity with the outside of the main tank 110, so that when the water level in the main tank 110 rises or falls, the air pressure outside the first cavity and the main tank 110 is balanced, and the phenomenon that water cannot flow smoothly due to unbalanced air pressure outside the first cavity and the main tank 110 or even the main tank 110 is deformed is avoided.

Referring to fig. 3, the one-way ventilation portion 112 is embedded in the ventilation hole 111, so that the ventilation hole can only be conducted in one way from the outside of the main water tank 110 to the first cavity, and external air can smoothly enter the first cavity when the water level in the main water tank 110 drops; however, when the water level in the first chamber rises during the process of adding water into the first chamber, the water in the first chamber does not flow out of the vent hole 111.

It should be noted that the main water tank 110 may be made of a material selected according to the use requirement, such as plastic, metal, etc. Generally, the material selected for the main water tank 110 may be an opaque material, and in this case, referring to fig. 2, a water level height display device is provided at a sidewall of the main water tank 110. The water level height display device may adopt that the transparent water pipe 20 is communicated with the first cavity, and the transparent water pipe 20 is embedded in the side wall of the main water tank 110; it is also possible to provide a long opening in the height direction of the side wall of the main tank 110 and seal the long opening with a transparent material. The water level height display device can observe the height of the water contained in the first cavity from the outside of the main water tank 110, and can add water to avoid influencing the use of the sweeper, or can timely turn off a faucet in the water adding process to avoid water resource waste.

It is understood that the one-way ventilation part 112 is used for realizing one-way conduction, and may be a one-way ventilation film, a woven fabric, or the like, or may be a one-way valve. In a specific arrangement, the one-way vent 112 is a one-way valve made of a flexible material.

It is understood that a flexible material refers to a material that has some degree of softness and flexibility. In this embodiment, the check valve may be made of a rubber material.

In order to realize the one-way conduction of the vent hole 111 in the direction from the outside of the main water tank 110 to the first cavity, the fit between the one-way ventilating part 112 and the vent hole 111 may be set to be an interference fit, and the one-way valve may be made of a flexible material so that the one-way valve is more easily embedded in the vent hole 111.

The check valve fitted in the vent hole 111 may be a commonly used gas check valve or liquid check valve, or may be a special gas/water check valve. In a specific arrangement, the check valve is a conventional spring-type check valve as shown in fig. 5.

As shown in fig. 6 and 7, the check valve includes a valve body 1121, a valve spool 1122, and a return spring 1123. With the return spring 1123 and the valve spool 1122 positioned within the valve body 1121. The return spring 1123 is compressed between the valve core 1122 and the inner surface of the valve body 1121, so that the check valve is in a closed state without an external force, and the return spring 1123 is stressed and compressed to enable the check valve to be in one-way conduction under the external force.

As shown in fig. 6, when no external force is applied, the valve core 1122 abuts against one end of the valve body 1121, which is far from the return spring 1123, under the action of the elastic force of the return spring 1123, so as to close the inlet and outlet of the end of the valve body 1121, which is far from the return spring 1123, thereby achieving a closing effect. As shown in FIG. 7, when the valve core 1122 receives an external force, it overcomes the elastic force of the return spring 1123 and can continue to compress the spring, so that the inlet and outlet of the end of the valve body 1121, which is far from the return spring 1123, are opened, and at this time, air or liquid at the end of the valve body 1121, which is far from the return spring 1123, can flow from the end of the valve body 1121, which is far from the return spring 1123, to the end of the valve body 1121, which is provided with the return spring 1123, thereby achieving unidirectional conduction. When the check valve shown in fig. 5 is installed in the vent hole 111, one end of the valve body 1121 having the return spring 1123 needs to be inserted into the vent hole and communicate with the first cavity, and one end of the valve body 1121, which is far from the return spring 1123, remains outside the main water tank 110, so as to achieve the effect of one-way conduction of the check valve in the direction from the outside of the main water tank 110 to the first cavity.

It will be appreciated that the function of the subtank 120 is to increase the water storage capacity of the water supply system 10. The second chamber is located inside the sub-tank 120 for storing water. When the subtank 120 and the main tank 110 are communicated, the water storage capacity of the water supply system 10 includes the water storage capacity of the first chamber and the water storage capacity of the second chamber.

It can be understood that since the subtank 120 is higher than the main tank 110, the water pressure in the subtank 120 is higher than the water pressure in the main tank 110 in a natural state, and the water in the subtank 120 tends to flow toward the main tank 110. If a check valve is not provided at the vent of the main tank 110, after the water in the main tank 110 fills the first cavity, if the water level of the sub tank 120 is still higher than the water level of the main tank 110, the water in the main tank 110 will overflow from the vent hole 111. Since the vent hole 111 of the main tank 110 is provided therein with a check valve that is one-way communicated in a direction from the outside of the main tank 110 to the first cavity, the water in the main tank 110 does not overflow even if the first cavity is filled with the water and the pressure of the water in the sub tank 120 is applied thereto.

Also, when the water level in the main tank 110 is lowered in a state where the subtank 120 and the main tank 110 are communicated, the air pressure in the first chamber is lowered. When the difference between the air pressure outside the main tank 110 and the air pressure in the first chamber reaches a value sufficient for the valve core 1122 to overcome the force of the return spring 1123 and continue to compress the spring, the check valve is opened and air outside the main tank 110 can enter the first chamber to balance the internal and external pressures. Before the check valve is opened, since the subtank 120 is communicated with the main tank 110, under the action of the pressure of the water in the subtank 120 and the atmospheric pressure in the subtank 120, the water in the second chamber of the subtank 120 flows into the first chamber of the main tank 110 to balance the pressures at both sides and realize the balance of the discharged water.

In the above scheme, by arranging the main water tank 110 and the auxiliary water tank 120, the water volume capacity of the ground cleaning equipment is increased, so that the water storage capacity can support cleaning work for a longer time in the cleaning process, and the main water tank 110 and the auxiliary water tank 120 are arranged at a high position and a low position, so that the position of the ground cleaning equipment in the height direction is reasonably utilized, the structure of the ground cleaning equipment is compact, and the space increase of the ground cleaning equipment caused by the addition of the auxiliary water tank 120 is reduced as much as possible. The one-way ventilating part 112 is embedded in the ventilating hole 111 of the main water tank 110, so that the ventilating hole 111 is only in one-way conduction in the direction from the outside of the main water tank 110 to the first cavity, and external air can smoothly enter the first cavity when the water level in the main water tank 110 is lowered, so that the air pressure imbalance between the first cavity and the outside of the main water tank 110 is avoided; when the water level of the first cavity rises, the water in the first cavity cannot flow out of the vent hole 111, and water resource waste caused by overflow of the water in the first cavity from the vent hole 111 is avoided.

Referring to fig. 2, in a specific arrangement, the main water tank 110 is provided with a first water inlet 113 and a first water outlet 114, the first water inlet 113 is communicated with the top end or the top surface of the side wall of the first cavity, and the first water outlet 114 is communicated with the bottom end or the bottom surface of the side wall of the first cavity.

Specifically, the first water inlet 113 is communicated with the first cavity and used for injecting water into the first cavity, and may be located at the top end of the side wall of the main water tank 110, or may be located on the top surface of the main water tank 110, so that the gas in the first cavity is smoothly discharged from the first water inlet 113 during the water injection process, and the first cavity is prevented from overflowing from the first water inlet 113 when the first cavity is not filled yet during the water injection process. The first water outlet 114 is connected to the first cavity and is used for discharging water in the first cavity, and may be located at the bottom end of the side wall of the main water tank 110, or may be located at the bottom surface of the main water tank 110, so as to discharge as much water in the first cavity as possible.

Referring to fig. 2, in a specific arrangement, the first water inlet 113 is provided with a first end cap 115, and the first end cap 115 is hermetically connected to the first water inlet 113.

It can be appreciated that the first end cap 115 serves to seal the first water inlet 113 such that water in the first cavity cannot be discharged from the first water inlet 113. The first end cap 115 and the first inlet may be connected by a screw, a snap, or the like. In this embodiment, as shown in fig. 2, the first end cap 115 is screwed to the first inlet, and the first end cap 115 is fitted to the first inlet.

Referring to fig. 4, in a specific arrangement, the auxiliary water tank 120 is provided with a second water inlet 121 and a second water outlet 122, the second water inlet 121 is disposed at the top end or the top surface of the side wall of the second cavity, and the second water outlet 122 is disposed at the bottom end or the bottom surface of the side wall of the second cavity.

It can be understood that the second water inlet 121 is disposed in the second cavity and used for injecting water into the second cavity, and may be located at the top end of the side wall of the secondary water tank 120, or located on the top surface of the secondary water tank 120, so that the gas in the second cavity is smoothly discharged during the water injection process, and the second cavity is prevented from overflowing from the second water inlet 121 during the water injection process. The second water outlet 122 is disposed in the second cavity and used for discharging water in the second cavity, and may be located at the bottom end of the sidewall of the auxiliary water tank 120 or at the bottom of the auxiliary water tank 120, so that water in the second cavity is discharged as much as possible.

Referring to fig. 1, in a specific configuration, the first water outlet 114 and the second water outlet 122 are both provided with valves.

It will be appreciated that the valve functions to communicate or close the first outlet port 114 and/or the second outlet port 122. Normally, the valves of the first and

second water outlets

114 and 122 are opened, so that the water in the main and

auxiliary tanks

110 and 120 can be normally adjusted for water pressure balance. The closed state of the valve is mainly applied when only a single tank is required for water storage, or when the main tank 110 or the sub-tank 120 is damaged for maintenance.

Referring to fig. 1, in a specific configuration, the first water outlet 114 and the second water outlet 122 are communicated through a water pipe 20.

It can be understood that the communication between the main tank 110 and the sub-tank 120 is represented by the communication between the first water outlet 114 and the second water outlet 122 through the water pipe 20, and since the first water outlet 14 and the second water outlet 122 are respectively located at lower positions in the main tank 110 and the sub-tank 120, the adjustment of the water amount can be performed through the communicated first water outlet 14 and second water outlet 122 even when the water amount in the main tank 110 and the sub-tank 120 is small, thereby facilitating the water pressure balance.

In a specific arrangement, the second water inlet 121 is provided with a second end cap 123, and the second end cap 123 covers or is embedded in the second water inlet 121 and is provided with a hole for ventilation.

It can be appreciated that the second cap 123 does not need to seal the second water inlet 121 since the sub tank 120 is positioned higher than the main tank 110 without risk of water in the second chamber overflowing the second water inlet 121. The hole for ventilation formed in the second end cap 123 enables the second cavity to be opened under atmospheric pressure, so that when water in the first cavity and the second cavity both descend, the water in the second cavity can still flow to the first cavity under the action of atmospheric pressure, thereby achieving the water pressure balance between the main water tank 110 and the auxiliary water tank 120.

Referring to fig. 1, in a specific arrangement, the water supply system 10 further includes a water pump 30. The water pump 30, the main tank 110 and the sub-tank 120 are communicated two by two through the water pipe 20 (three branched water pipes connected by a three-way structure) provided with three-port openings.

As shown in fig. 1, the water pipe 20 includes three directions that are communicated with each other and respectively connects the main tank 110, the subtank 120 and the water pump 30, so that when the water pump 30 pumps water, water in the main tank 110 and the subtank 120 can be simultaneously pumped.

When the water pump 30 pumps water, the water in the main tank 110 and the subtank 120 is simultaneously pumped out by the water pump 30, and the water levels in both the main tank 110 and the subtank 120 drop. At this time, since the second end cap 123 in the auxiliary water tank 120 is opened with a hole for ventilation, the water in the second cavity is always kept under the action of atmospheric pressure. And the first cap 115 in the main water tank 110 seals the first water inlet 113, the air pressure in the first chamber is reduced to be lower than the atmospheric pressure. When the difference between the air pressure outside the main tank 110 and the air pressure in the first chamber reaches a value sufficient for the valve core 1122 to overcome the elastic force of the return spring 1123 and continue to compress the spring, the check valve is opened, and the air outside the main tank 110 can enter the first chamber to balance the internal and external pressures, so that the air pressure in the first chamber rises. But is sealed when the air pressure in the first chamber rises to the air pressure outside the main tank 110 and the difference between the air pressure in the first chamber is not enough for the valve core 1122 to overcome the elastic force of the return spring 1123 and continue to compress the spring. At this time, the air pressure in the first chamber is still lower than the atmospheric pressure. And the water in the second cavity of the subtank 120 is not only at atmospheric pressure, but also because the subtank 120 is higher than the main tank 110, and there is a water pressure difference between the water in the subtank 120 and the water in the main tank 110, the water in the subtank 120 will flow into the main tank 110 through the water pipe 20 to achieve pressure balance between the main tank 110 and the subtank 120.

It can be understood that, since the water level in the first chamber is lowered, the air outside the main water tank 110 enters into the first chamber and cannot be discharged through the vent hole 111. Although the water in the sub-tank 120 may flow into the main tank 110 through the water pipe 20, the water in the main tank 110 is not raised to an overfilled state due to the presence of the air in the first chamber.

When the pressure is balanced between the main tank 110 and the subtank 120, the gas in the first chamber of the main tank 110 is compressed under the influence of the water pressure of the subtank 120, so that the pressure of the gas in the first chamber is greater than the atmospheric pressure at this time. When the pressure is equalized between the main tank 110 and the subtank 120, the difference between the atmospheric pressure and the atmospheric pressure in the first chamber is affected by the height difference between the main tank 110 and the subtank 120.

In a particular arrangement, as shown in figure 1, the pump 30 is connected at its pumping end to the main tank 110 and the auxiliary tank 120 by the pipes 20 and the pump 30 is connected at its discharge end to the nozzle 40. Wherein the number of the nozzles 40 may be plural.

An embodiment of the present application also provides a floor cleaning device comprising a water supply system as shown in any of the above embodiments. Wherein the floor cleaning device may be a sweeper or scrubber. The floor scrubbing apparatus has a main tank 110 and a secondary tank 120 for holding water to store more water for sweeping. And the water in the main water tank 110 is not easy to overflow, so as to avoid waste of water.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A water supply system, comprising:

the main water tank is of a hollow structure, a first cavity is formed in the main water tank, an air vent is formed in the main water tank, a one-way ventilating portion is embedded in the air vent, and the one-way ventilating portion is in one-way conduction in the direction from the outside of the main water tank to the first cavity;

the auxiliary water tank is of a hollow structure, a second cavity is arranged in the auxiliary water tank, the auxiliary water tank is higher than the main water tank, and the auxiliary water tank is communicated with the main water tank.

2. The water supply system according to claim 1, wherein the main water tank is provided with a first water inlet and a first water outlet, the first water inlet is disposed at a top end or a top surface of the side wall of the first chamber, and the first water outlet is disposed at a bottom end or a bottom surface of the side wall of the first chamber.

3. The water supply according to claim 2 wherein the first water inlet is provided with a first end cap sealingly connected to the first water inlet.

4. The water supply system according to claim 2, wherein the sub-tank is provided with a second water inlet and a second water outlet, the second water inlet is disposed at a top end or a top surface of a side wall of the second chamber, and the second water outlet is disposed at a bottom end or a bottom surface of the side wall of the second chamber.

5. The water supply system according to claim 4, wherein the first water outlet and the second water outlet are each provided with a valve.

6. The water supply system according to claim 4, wherein the first water outlet and the second water outlet are in communication via a water pipe.

7. The water supply system according to claim 4, wherein the second water inlet is provided with a second end cap which is wrapped or embedded in the second water inlet and is provided with a hole for ventilation.

8. The water supply system according to claim 1, further comprising a water pump, wherein the water pump, the main tank and the sub tank are communicated with each other through a water pipe provided with three-port openings.

9. The water supply according to claim 1 wherein the one-way vent is a one-way valve made of a flexible material.

10. A floor cleaning device comprising a water supply system as claimed in any one of claims 1 to 9.