CN216060406U - Check valve, water tank and cleaning equipment - Google Patents

Abstract

The utility model discloses a one-way valve, a water tank and cleaning equipment, wherein the one-way valve comprises a valve body, a flexible part and a valve core, the valve body is provided with an air passage, a first opening and a second opening which are respectively communicated with the air passage, the flexible part is provided with a through hole, the flexible part is arranged at the second opening in a shielding manner, the air passage is communicated with the outside through the through hole, the valve core is movably arranged in the air passage, when the valve body is in a communicated state, the valve core and the flexible part are arranged at intervals, and when the valve body is in a non-return state, the valve core is abutted against the flexible part and seals the through hole. When the one-way valve is used for cleaning equipment, the water tank is communicated with the outside through the gas channel of the one-way valve and the upper cover, when the one-way valve is in a normal state (water in the water tank cannot overflow), the one-way valve is in a communicated state, and when the one-way valve is in an abnormal state (water in the water tank can overflow), the one-way valve is in a non-return state. The one-way valve switches states along with the posture of the water tank, so that the communication between the inside of the water tank and the outside is met, and the problem of water overflow in the water tank is prevented.

Description

Check valve, water tank and cleaning equipment

Technical Field

The utility model belongs to the technical field of cleaning equipment, and particularly relates to a one-way valve, a water tank and cleaning equipment.

Background

A floor washing machine as a cleaning device generally includes a machine body and a water tank disposed on and communicated with the machine body, the water tank supplying clean water to the machine body so as to facilitate the machine body to perform floor washing and mopping operations. The inside that the water tank need keep the water tank in the use communicates with the external world (in the water supply process, the pressure in the water tank constantly reduces, in order to guarantee effective going on of water supply, need keep the pressure balance inside and outside the water tank, perhaps when carrying out the electrolysis to the water in the water tank, the gas that produces in the electrolysis process need be discharged to the outside of box).

However, set up the water tank into with external intercommunication, when the water tank was in gesture such as slope or handstand, the water in the water tank can spill over, has reduced user's use experience.

Disclosure of Invention

The utility model aims to at least solve the problem of how to prevent water in a water tank from overflowing while the inside of the water tank is communicated with the outside. This object is achieved by:

a first aspect of the present invention provides a one-way valve, comprising:

the valve body is provided with an air passage, a first opening and a second opening which are respectively communicated with the air passage;

the flexible piece is provided with a through hole, the flexible piece is arranged on the second opening in a shielding manner, and the air passage is communicated with the outside through the through hole;

the valve core is movably arranged in the air passage, the valve core and the flexible piece are arranged at intervals when the valve body is in a communicated state, and the valve core is abutted against the flexible piece and seals the through hole when the valve body is in a non-return state.

According to the one-way valve, the one-way valve has two states, wherein one state is a communication state, and the other state is a return state; when the check valve is in a check state, the valve core abuts against the flexible piece and closes the communication position of the through hole and the air passage so as to disconnect the air passage. When the check valve was used on cleaning device's water tank, the check valve was installed and is covered on the water tank, and the gas passage and the external world intercommunication of water tank inside through first opening, air flue, through-hole and upper cover when the gesture of water tank was in normal condition (the water in the water tank can't overflow), the check valve was in the connected state, and when the gesture of water tank was in abnormal state (the water in the water tank can overflow), the check valve was in the non return state.

The one-way valve switches the state along with the posture of the water tank, so that the problem that water in the water tank overflows is effectively prevented while the inside of the water tank is communicated with the outside, and the use experience of a user is improved.

In addition, the check valve according to the present invention may have the following additional technical features:

in some embodiments of the utility model, the valve element is a ball.

In some embodiments of the present invention, the through hole is a circular hole, the diameter of the circular hole is smaller than the diameter of the ball, the opening of the circular hole facing the ball is in a bell-mouth structure, and when the check valve is in the non-return state, at least a part of the ball is accommodated in the bell-mouth structure

In some embodiments of the present invention, a supporting structure is disposed in the air duct, the supporting structure is disposed opposite to the second opening, the valve element is movably disposed between the flexible member and the supporting structure, and when the check valve is in a communication state, the valve element abuts against the supporting structure.

In some embodiments of the utility model, the air duct is a bent structure, and corners of the bent structure form the supporting structure.

In some embodiments of the utility model, the valve element is a ball.

In some embodiments of the utility model, the ball is a stainless steel ball, a marble ball, or a ceramic ball.

In some embodiments of the utility model, the maximum dimension of the first opening is less than the diameter of the ball.

In some embodiments of the present invention, the number of the first openings is plural, and the plural first openings are arranged at intervals in a circumferential direction of the valve body.

In some embodiments of the utility model, the first opening is provided with a grating structure.

In some embodiments of the utility model, at least one side of the valve body away from the flexible member is a hollow structure, and the hollow structure forms the first opening.

A second aspect of the present invention provides a water tank, comprising:

the upper cover is provided with a gas channel communicated with the outside;

according to the check valve, the check valve is arranged on the upper cover, and the air passage is communicated with the air channel through the through hole;

the top of box is equipped with the open end, upper cover with separable mode with the box cooperation just is used for opening or seals the open end, the air flue pass through first opening with the inside intercommunication of box.

According to the water tank, the one-way valve on the water tank has two states, wherein one state is a communication state, and the other state is a return state; when the check valve is in a check state, the valve core abuts against the flexible piece and closes the communication position of the through hole and the air passage so as to disconnect the air passage. When the check valve was used on cleaning device's water tank, the check valve was installed and is covered on the water tank, and the gas passage and the external world intercommunication of water tank inside through first opening, air flue, through-hole and upper cover when the gesture of water tank was in normal condition (the water in the water tank can't overflow), the check valve was in the connected state, and when the gesture of water tank was in abnormal state (the water in the water tank can overflow), the check valve was in the non return state.

The one-way valve switches the state along with the posture of the water tank, so that the problem that water in the water tank overflows is effectively prevented while the inside of the water tank is communicated with the outside, and the use experience of a user is improved.

A third aspect of the utility model proposes a cleaning device comprising;

a body;

according to the water tank as described above, the water tank is disposed on the machine body and communicates with the machine body.

According to the cleaning equipment, the one-way valve of the water tank of the cleaning equipment has two states, wherein one state is a communication state, and the other state is a return state; when the check valve is in a check state, the valve core abuts against the flexible piece and closes the communication position of the through hole and the air passage so as to disconnect the air passage. When the check valve was used on cleaning device's water tank, the check valve was installed and is covered on the water tank, and the gas passage and the external world intercommunication of water tank inside through first opening, air flue, through-hole and upper cover when the gesture of water tank was in normal condition (the water in the water tank can't overflow), the check valve was in the connected state, and when the gesture of water tank was in abnormal state (the water in the water tank can overflow), the check valve was in the non return state.

The one-way valve switches the state along with the posture of the water tank, so that the problem that water in the water tank overflows is effectively prevented while the inside of the water tank is communicated with the outside, and the use experience of a user is improved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like parts are designated by like reference numerals throughout the drawings. Wherein:

fig. 1 schematically shows a schematic construction of a cleaning device according to an embodiment of the utility model;

FIG. 2 is a structural sectional view of a water tank of the cleaning apparatus shown in FIG. 1 (a check valve is in a communicating state);

FIG. 3 is a schematic view of an exploded structure of the water tank shown in FIG. 2;

FIG. 4 is a schematic structural view of a valve body of the water tank shown in FIG. 3;

FIG. 5 is a schematic view of the structure of the flexible member of the water tank shown in FIG. 3;

FIG. 6 is an enlarged view of part A of the water tank shown in FIG. 2 (the water tank is in a vented state);

FIG. 7 is an enlarged view of portion A of the tank shown in FIG. 2 (the tank being in an intake state);

FIG. 8 is a structural cross-sectional view of a water tank of the cleaning device shown in FIG. 1 (the check valve is in a check state);

fig. 9 is an enlarged structural view of a portion B of the water tank shown in fig. 8.

The reference numerals in the drawings denote the following:

100 is a cleaning device;

10 is a machine body;

20 is a water tank;

21 is a one-way valve;

211 is a valve body;

2111 is the airway, 2112 is the second opening, 2113 is the first opening, 2114 is the support structure;

212 is a valve core;

213 is a flexible member;

2131 is a through hole, 2132 is a bell mouth structure;

22 is an upper cover;

221 is a gas channel;

23 is a box body;

24 is a sealing member;

and 25 is a communication valve.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 9, the present invention provides a check valve 21, the check valve 21 includes a valve body 211, a flexible member 213 and a valve core 212, the valve body 211 is provided with an air passage 2111 and a first opening 2113 and a second opening 2112 which are respectively communicated with the air passage 2111, the flexible member 213 is provided with a through hole 2131, the flexible member 213 is disposed at the second opening 2112 in a shielding manner, the air passage 2111 is communicated with the outside through the through hole 2131, the valve core 212 is movably disposed in the air passage 2111, when the valve body 211 is in a communication state, the valve core 212 and the flexible member 213 are disposed at an interval, when the valve body 211 is in a non-return state, the valve core 212 abuts against the flexible member 213 and closes the through hole 2131.

Specifically, the check valve 21 has two states, one state is a communication state, and the other state is a return state, when the check valve 21 is in the communication state, the valve core 212 is separated from the flexible member 213, at this time, one side of the air passage 2111 of the valve core 212 is communicated with the outside through the first opening 2113, and the other side of the air passage 221 is communicated with the outside through the through hole 2131 of the flexible member 213; when the check valve 21 is in the check state, the spool 212 abuts on the flexible member 213 and closes the communication position of the through hole 2131 with the air passage 2111 to disconnect the air passage 2111. When the check valve 21 is applied to the water tank 20 of the cleaning apparatus 100, the check valve 21 is installed on the upper cover 22 of the water tank 20, the inside of the water tank 20 communicates with the outside through the first opening 2113, the air passage 2111, the through hole 2131, and the air passage 221 of the upper cover 22, when the posture of the water tank 20 is in a normal state (water in the water tank 20 cannot overflow), the check valve 21 is in a communicating state, and when the posture of the water tank 20 is in an abnormal state (water in the water tank 20 can overflow), the check valve 21 is in a non-return state.

The one-way valve 21 switches states along with the posture of the water tank 20, so that the problem that water in the water tank 20 overflows is effectively prevented while the inside of the water tank 20 is communicated with the outside, and the use experience of a user is improved.

It should be understood that the valve core 212 is movably disposed in the air channel 2111, when the check valve 21 is used for cleaning the water tank 20 of the device 100, the check valve 21 is mounted on the upper cover 22 of the water tank 20, the upper cover 22 is located on the top of the tank 23 of the water tank 20, the water level in the tank 23 is usually lower than the upper cover 22, when the cleaning device 100 is used or the water tank 20 is separated from the cleaning device 100, the water tank 20 is in a tilted state or an inverted state (the posture of the water tank 20 is in an abnormal state), and the position of the valve core 212 of the check valve 21 changes, that is, the valve core 212 closes the through hole 2131 on the flexible member 213, and when the water level in the tank 23 reaches the communication position between the check valve 21 and the tank 23, water cannot overflow to the outside of the water tank 20 through the check valve 21, so as to avoid overflow of water, and the use experience of a user is improved.

In addition, the through hole 2131 is arranged on the flexible member 213, the size of the valve core 212 is larger than that of the through hole 2131, and when the valve core 212 abuts against the flexible member 213, the sealing effect of the valve core 212 on the through hole 2131 is ensured.

In addition, when the valve core 212 abuts against the flexible member 213, the self gravity of the valve core 212 drives the flexible member 213 to elastically deform, so that the valve core 212 and the flexible member 213 are better attached to each other, thereby ensuring the sealing effect of the valve core 212 on the through hole 2131, and further improving the non-return effect of the water in the water tank 20.

It should be noted that, when the check valve 21 is used for the water tank 20 of the cleaning device 100, an installation structure is provided on the upper cover 22 of the water tank 20, the valve body 211 is matched with the installation structure, the flexible piece 213 is clamped at a combination position of the valve body 211 and the installation structure, after installation and fixation, the second opening 2112 of the valve body 211 is shielded by the flexible piece 213, so that the air passage 2111 of the valve body 211 can be communicated with the exhaust passage of the upper cover 22 only through the through hole 2131 of the flexible piece 213, and the flexible piece 213 is clamped between the valve body 211 and the installation structure, so that the installation position of the valve body 211 can be sealed to avoid water leakage.

In some embodiments, the flexible member 213 is a silicone member, which has stable performance, and through the cooperation with the valve core 212, the anti-overflow effect on water can be effectively improved.

In some embodiments, the flexible member 213 is a rubber member, which has a low manufacturing cost, and effectively reduces the manufacturing cost of the check valve 21.

It is further understood that, as shown in fig. 2 and 3, and fig. 6 to 9, in the embodiment of the present invention, the valve element 212 is a ball, when the check valve 21 is used in the water tank 20 of the cleaning device 100, the valve element 212 rolls with respect to the air passage 2111 along with the posture change of the water tank 20, and by setting the valve element 212 to be a ball, the smoothness of the valve element 212 rolling in the air passage 2111 is improved, the situation that the valve element 212 is stuck with the air passage 2111 is avoided, the effective switching between the communication state and the non-return state of the check valve 21 is effectively ensured, and the use requirement of the water tank 20 is further satisfied.

It will be appreciated that the internal dimensions of the passageway 2111 are such as to accommodate the rolling requirements of the ball, further avoiding jamming of the valve element 212 as it moves relative to the passageway 2111.

It should be noted that, in other embodiments, the valve core 212 is a cylindrical member, the air passage 2111 is adapted to the movable space of the valve core 212, and the switching of the state of the check valve 21 is realized by the movement of the cylindrical member in the air passage 2111.

Further, as shown in fig. 5 and 9, the through hole 2131 is a circular hole, the diameter of the circular hole is smaller than that of the ball, the opening of the circular hole facing the ball is a bell mouth structure 2132, and when the check valve 21 is in the non-return state, at least a part of the ball is accommodated in the bell mouth structure 2132. Specifically, when the check valve 21 is switched to the check state, the valve element 212, which is a ball, abuts against the flexible element 213, and at least a part of the body of the ball enters the bell mouth structure 2132, so that the contact area between the valve element 212 and the flexible element 213 is increased, and the sealing performance of the check valve 21 in the check state is improved.

Further, as shown in fig. 2 and 3, and fig. 6 to 9, a supporting structure 2114 is disposed in the air passage 2111, the supporting structure 2114 is disposed opposite to the second opening 2112, the valve element 212 is movably disposed between the flexible member 213 and the supporting structure 2114, and when the check valve 21 is in a communication state, the valve element 212 abuts against the supporting structure 2114. Specifically, the portion of the air passage 2111 located between the flexible member 213 and the support structure 2114 is a straight air passage 2111 structure, the valve element 212 moves relative to the air passage 2111 along with the posture change of the valve seat, when the valve element 212 abuts against one side of the flexible member 213, the check valve 21 is in a return state, when the valve element 212 abuts against the support structure 2114, the check valve 21 is in a communication state, and by providing the support structure 2114, the structure of the check valve 21 can be effectively simplified while the state switching of the check valve 21 is realized, so that the manufacturing cost of the check valve 21 is reduced.

It should be noted that when the valve core 212 abuts against the supporting structure 2114, the valve core 212 does not affect the communication of the air passage 2111, i.e. the air passage 2111 can be communicated with the outside through the first opening 2113 and the through hole 2131 of the flexible member 213.

In an embodiment of the utility model, the air passages 2111 are of a bent configuration, with the corners of the bent configuration forming the support structure 2114. Specifically, the bending structure may be a serpentine shape or an L-shape, for example, the bending structure is an L-shape, as shown in fig. 2 to 4 and fig. 6 to 9, one end of the L-shape is corresponding to the first opening 2113, the other end of the L-shape is corresponding to the second opening 2112, wherein the flexible member 213 is disposed at the second opening 2112 and closes the second opening 2112, a corner of the L-shape is disposed corresponding to the flexible member 213 disposed at the second opening 2112, a space between the flexible member 213 and the corner of the air passage 2111 forms a movable range of the valve element 212, and the position of the valve element 212 is adjusted by adjusting the posture of the check valve 21, so that the state of the check valve 21 is switched to meet the usage requirement of the water tank 20 of the cleaning apparatus 100.

In other embodiments, a bracket is provided in the air channel 2111, the bracket forms the holding structure 2114, the space between the bracket and the flexible member 213 is the movement space of the valve element 212, and the bracket can be integrated into the air channel 2111 or can be mounted in the channel.

Further, the ball-shaped member is a stainless steel ball, a marble ball or a ceramic ball. Specifically, in the present invention, the valve core 212, which is a ball-shaped member, is movably disposed in the air passage 2111, and when the attitude of the check valve 21 changes, the stainless steel ball moves relative to the air passage 2111 under the action of its own gravity, and because the mass of the stainless steel ball is large under the condition of the same volume, the valve core 212 is set as the stainless steel ball, which can improve the sensitivity of the valve core 212, thereby ensuring effective switching of the state of the check valve 21.

In some embodiments of the utility model, the maximum dimension of the first opening 2113 is less than the diameter of the ball. The maximum size of the first opening 2113 is set to be smaller than the diameter of the ball, so that the valve core 212 is effectively limited in the air channel 2111, the valve core 212 is prevented from falling off, and the performance of the one-way valve 21 is guaranteed.

It is to be noted that when the number of the first openings 2113 is one, the first openings 2113 are provided on the side wall of the valve body 211, and the positions of the first openings 2113 are provided away from the bottom of the valve seat, when the check valve 21 is used for the water tank 20 of the cleaning apparatus 100, the first openings 2113 can be made away from the water level of the water tank 20, further avoiding a situation where the water of the water tank 20 overflows.

Further, the number of the first openings 2113 is plural, and the plural first openings 2113 are provided at intervals in the circumferential direction of the valve body 211. Specifically, by providing a plurality of first openings 2113, thereby increasing the gas throughput of the gas passage 2111, when the check valve 21 is used to clean the water tank 20 of the apparatus 100, the time for balancing the gas pressure inside and outside the water tank 20 can be shortened.

In some embodiments of the utility model, the first opening 2113 is provided with a grating structure. The grating structure is disposed at the first opening 2113, and by providing the grating structure, the valve element 212 is effectively prevented from being separated from the air passage 2111 through the first opening 2113 while ensuring that the gas can pass through the first opening 2113.

In some embodiments of the present invention, at least a side of the valve body 211 away from the flexible member 213 is a hollow structure, and the hollow structure forms the first opening 2113. The side of the valve body 211, which is far away from the flexible part 213, is set to be a hollow structure to form the first opening 2113, so that the airflow flux of the first opening 2113 is further improved, and when the check valve 21 is used for cleaning the water tank 20 of the device 100, the time for balancing the air pressure inside and outside the water tank 20 is further shortened.

As shown in fig. 1 to 9, the present invention also provides a water tank 20, the water tank 20 includes a check valve 21, an upper cover 22 and a tank body 23 as above, the upper cover 22 is provided with an air passage 221 communicating with the outside, the check valve 21 is mounted on the upper cover 22, the air passage 2111 communicates with the air passage 221 through a through hole 2131, the top of the tank body 23 is provided with an open end, the upper cover 22 is detachably engaged with the tank body 23 and is used for opening or closing the open end, and the air passage 2111 communicates with the inside of the tank body 23 through a first opening 2113.

Specifically, the check valve 21 on the water tank 20 has two states, one state is a communication state, and the other state is a return state, when the check valve 21 is in the communication state, the valve core 212 is separated from the flexible member 213, at this time, one side of the air passage 2111 of the valve core 212 is communicated with the outside through the first opening 2113, and the other side of the air passage 221 is communicated with the outside through the through hole 2131 of the flexible member 213; when the check valve 21 is in the check state, the spool 212 abuts on the flexible member 213 and closes the communication position of the through hole 2131 with the air passage 2111 to disconnect the air passage 2111. When the check valve 21 is applied to the water tank 20 of the cleaning apparatus 100, the check valve 21 is installed on the upper cover 22 of the water tank 20, the inside of the water tank 20 communicates with the outside through the first opening 2113, the air passage 2111, the through hole 2131, and the air passage 221 of the upper cover 22, when the posture of the water tank 20 is in a normal state (water in the water tank 20 cannot overflow), the check valve 21 is in a communicating state, and when the posture of the water tank 20 is in an abnormal state (water in the water tank 20 can overflow), the check valve 21 is in a non-return state.

The one-way valve 21 switches states along with the posture of the water tank 20, so that the problem that water in the water tank 20 overflows is effectively prevented while the inside of the water tank 20 is communicated with the outside, and the use experience of a user is improved.

It should be noted that, the upper cover 22 is provided with a mounting structure and a gas channel 221, the gas channel 221 has a first gas port and a second gas port, wherein, the check valve 21 is matched with the mounting structure, the gas channel 2111 in the check valve 21 is communicated with the gas channel 221 through the first gas port, the first opening 2113 of the valve body 211 of the check valve 21 is communicated with the inside of the box body 23, and the second gas port is communicated with the outside, so as to ensure the communication between the inside of the box body 23 and the outside.

Further, when the water tank 20 is used in the cleaning apparatus 100, the water tank 20 needs to maintain the communication between the inside of the tank 23 and the outside as shown in fig. 6 (black solid arrows in fig. 6 indicate the discharge direction of the gas), when the water in the tank 23 is ionized, the gas generated during the ionization needs to be discharged out of the tank 23 as shown in fig. 7 (black hollow arrows in fig. 7 indicate the entrance direction of the gas), when the water in the tank 23 is supplied to the body 10 of the cleaning apparatus 100, the pressure in the tank 23 is reduced, and in order to ensure that the water in the tank 23 can be continuously supplied to the body 10, the outside air needs to enter the tank 23 to balance the air pressure of the tank 23.

The tank 20 further includes a communication valve 25 and a sealing member 24, the communication valve 25 is disposed at the bottom of the tank body 23, the communication valve 25 has a one-way communication structure, and the communication valve 25 has a normally closed structure. When the water tank 20 is mated with the body 10 of the cleaning apparatus 100, the jack-up structure on the body 10 is inserted into the communication valve 25, so that the communication valve 25 is opened, thereby achieving communication of the water tank 20 with the body 10. The sealing member 24 is a sealing ring disposed between the upper cover 22 and the tank body 23 to ensure sealability of the water tank 20.

As shown in fig. 1 to 9, the present invention additionally proposes a cleaning apparatus 100, the cleaning apparatus 100 including the water tank 20 and the machine body 10 according to the above, the water tank 20 being disposed on the machine body 10 and communicating with the machine body 10.

Specifically, the check valve 21 of the water tank 20 of the cleaning device 100 has two states, one state is a communication state, and the other state is a return state, when the check valve 21 is in the communication state, the valve core 212 is separated from the flexible member 213, at this time, one side of the air passage 2111 of the valve core 212 is communicated with the outside through the first opening 2113, and the other side of the air passage 221 is communicated with the outside through the through hole 2131 of the flexible member 213; when the check valve 21 is in the check state, the spool 212 abuts on the flexible member 213 and closes the communication position of the through hole 2131 with the air passage 2111 to disconnect the air passage 2111. When the check valve 21 is applied to the water tank 20 of the cleaning apparatus 100, the check valve 21 is installed on the upper cover 22 of the water tank 20, the inside of the water tank 20 communicates with the outside through the first opening 2113, the air passage 2111, the through hole 2131, and the air passage 221 of the upper cover 22, when the posture of the water tank 20 is in a normal state (water in the water tank 20 cannot overflow), the check valve 21 is in a communicating state, and when the posture of the water tank 20 is in an abnormal state (water in the water tank 20 can overflow), the check valve 21 is in a non-return state.

The one-way valve 21 switches states along with the posture of the water tank 20, so that the problem that water in the water tank 20 overflows is effectively prevented while the inside of the water tank 20 is communicated with the outside, and the use experience of a user is improved.

In the present invention, the cleaning device 100 may be a floor washing machine, etc., and other structures of the cleaning device 100 refer to the prior art, which is not described herein again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (12)

1. A one-way valve, comprising:

the valve body is provided with an air passage, a first opening and a second opening which are respectively communicated with the air passage;

the flexible piece is provided with a through hole, the flexible piece is arranged on the second opening in a shielding manner, and the air passage is communicated with the outside through the through hole;

the valve core is movably arranged in the air passage, the valve core and the flexible piece are arranged at intervals when the one-way valve is in a communicated state, and the valve core is abutted against the flexible piece and seals the through hole when the one-way valve is in a non-return state.

2. The check valve of claim 1, wherein the valve core is a ball.

3. The check valve of claim 2, wherein the through hole is a circular hole having a diameter smaller than a diameter of the ball, an opening of the circular hole toward the ball is in a bell-mouth configuration, and at least a portion of the ball is received in the bell-mouth configuration when the check valve is in the non-return state.

4. The check valve of claim 1, wherein a support structure is disposed in the air passage, the support structure is disposed opposite to the second opening, the valve element is movably disposed between the flexible member and the support structure, and when the check valve is in a communication state, the valve element abuts against the support structure.

5. The check valve of claim 4, wherein the air passage is a bent structure, and corners of the bent structure form the bearing structure.

6. The check valve of claim 2, wherein the ball is a stainless steel ball, a marble ball, or a ceramic ball.

7. The one-way valve of claim 2, wherein a maximum dimension of the first opening is less than a diameter of the ball.

8. The check valve of claim 7, wherein the first opening is plural in number, and the plural first openings are provided at intervals in a circumferential direction of the valve body.

9. The check valve of claim 2, wherein the first opening is provided with a grating structure.

10. The check valve of claim 2, wherein at least one side of the valve body away from the flexible member is a hollowed-out structure, and the hollowed-out structure forms the first opening.

11. A water tank, characterized in that it comprises:

the upper cover is provided with a gas channel communicated with the outside;

the check valve according to any one of claims 1 to 10, which is mounted to the upper cover, the gas passage communicating with the gas passage through the through hole;

the top of box is equipped with the open end, upper cover with separable mode with the box cooperation just is used for opening or seals the open end, the air flue pass through first opening with the inside intercommunication of box.

12. A cleaning apparatus, characterized in that the cleaning apparatus comprises;

a body;

the water tank of claim 11, disposed on and in communication with the body.

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