WO2023030220A1

WO2023030220A1 - Novel rotary-switch aerator

Info

Publication number: WO2023030220A1
Application number: PCT/CN2022/115400
Authority: WO
Inventors: 廖冬冬; 吴国强; 林荣华
Original assignee: 厦门纳美宸科技有限公司
Priority date: 2021-08-30
Filing date: 2022-08-29
Publication date: 2023-03-09
Also published as: CN113550388A

Abstract

The present invention relates to the technical field of aerators, and provides a novel rotary-switch aerator. The aerator comprises a connector, a rotating frame, a water distribution plate, and a sealing member. A water inlet port and a water outlet port are formed on the connector. The rotating frame is rotatably connected to the connector and is provided with a first water flow channel and a second water flow channel. First water distribution holes communicated with the first water flow channel and second water distribution holes communicated with the second water flow channel are formed on the water distribution plate. The water distribution plate is mounted on the rotating frame, and rotates along with the rotating frame so that the water outlet port of the connector is communicated with the first water distribution holes or the second water distribution holes. A mounting portion of the sealing member is disposed at a position corresponding to the water outlet port on the connector, and the sealing member is disposed on the mounting portion to sealingly deliver water from the connector into the first water distribution holes or the second water distribution holes of the water distribution plate. Switching between connections with the first water distribution holes and the second water distribution holes of the water distribution plate is implemented on the connector by means of the same water outlet port, thereby greatly simplifying the structure of the connector.

Description

A New Rotary Switching Bubbler

technical field

The invention relates to the technical field of bubblers, in particular to a novel rotary switching bubbler.

Background technique

The bubbler can make the water from the faucet softer, and experiments have proved that the use of the bubbler can wash hands with a smaller amount of water. Therefore, the bubbler has become an indispensable part in kitchen and bathroom equipment.

In the prior art, the bubbler is usually provided with multiple gears and different water outlet modes. Corresponding to different water outlet modes, different water channels need to be set inside the bubbler. In particular, different water inlet channels are connected to different water outlet channels inside the bubbler to achieve different water outlet effects. Therefore, the internal structure of the bubbler is often complicated, so that the volume of the bubbler is relatively large, and it is installed independently on the faucet, which is very abrupt, not only takes up space, but also is not beautiful.

In view of this, the applicant proposes the present application after studying the prior art.

Contents of the invention

The invention provides a novel rotary switching bubbler, which aims to improve the problem of too complicated internal water path of the bubbler.

In order to solve the above technical problems, the present invention provides a novel rotary switching bubbler, which includes a connecting head, a rotating frame, a water dividing plate and a sealing member.

The connection head is provided with a water inlet port and a water outlet port. The rotating frame is rotatably connected with the connecting head, and a first water flow channel and a second water flow channel are arranged on it. The water distribution plate is provided with a first water distribution hole communicated with the first water flow channel and a second water distribution hole communicated with the second water flow channel. The water dividing plate is installed on the rotating frame, and rotates together with the rotating frame so that the water outlet port of the connecting head communicates with the first water dividing hole or the second water dividing hole. The installation part of the seal is provided on the connection head corresponding to the water outlet port, and the seal is arranged on the installation part to send water from the connection head to the first water distribution hole or the second water distribution hole of the water distribution plate in a sealed manner .

In an optional embodiment, the water outlet direction of the first water diversion hole and the water outlet direction of the second water diversion hole form an included angle.

In an optional embodiment, the included angle is 10 degrees to 60 degrees.

In an optional embodiment, the included angle is one of 10 degrees, 15 degrees, 25 degrees, 30 degrees, 45 degrees, 50 degrees, 60 degrees, and 70 degrees.

In an optional embodiment, a diffuser assembly is further included, the diffuser assembly is arranged on the connection head, and forms a first buffer chamber with it, and the water outlet port communicates with the first buffer chamber.

In an optional embodiment, the middle part of the diffuser component is provided with a first through hole through which water flows through, and an upward protrusion is provided below the first through hole, and the protrusion is in the shape of a cone.

In an optional embodiment, the diffuser assembly includes a first diffuser disposed on the connection head. A first buffer chamber is formed between the first diffuser and the connecting head. The first diffuser is provided with at least one first through hole for connecting the water inlet port and the first buffer chamber. The first through hole and the water outlet port are misaligned.

In an optional embodiment, the diffuser assembly further includes a second diffuser configured on the first diffuser. A second buffer cavity is formed between the second diffuser and the first diffuser. The second diffuser is provided with at least one second through hole communicating with the second buffer cavity and the water inlet port. The first through hole communicates with the first buffer chamber and the second buffer chamber, and the diameter of the first through hole is larger than that of the second through hole.

In an optional embodiment, the seal is a cup. The installation part is a hollow column protruding downward, and the leather cup is installed in the hollow column and contacts with the water dividing plate.

In an optional embodiment, the connection head is provided with a plurality of water outlet ports, and the water outlet ports are distributed circumferentially. A plurality of first water diversion holes and a plurality of second water diversion holes are arranged on the water diversion plate, and the first water diversion holes and the second water diversion holes are distributed at intervals in the circumferential direction.

In an optional embodiment, the water inlet of the first water distribution hole and the water inlet of the second water distribution hole are distributed circumferentially at intervals, and the water outlet of the first water distribution hole surrounds the circumference of the water outlet of the second water distribution hole. distributed.

In an optional embodiment, the first water flow channel is circumferentially arranged around the second water flow channel on the rotating frame, and the first water flow channel, the second water flow channel and the lower surface of the water dividing plate form an air suction path.

By adopting the above technical solution, the present invention can achieve the following technical effects:

The first water diversion hole and the second water diversion hole are arranged on the water diversion plate, and the corresponding first water flow channel and the second water flow channel are arranged on the rotating frame. When the swivel frame is rotated, the water outlet port of the connecting head can be switched to be connected to the first water distribution hole and the second water distribution hole, so as to realize different water outlet modes. The first water diversion hole and the second water diversion hole connected to the water diversion plate are switched through the same water outlet port on the connector head, which greatly simplifies the structure of the connector head and makes the bubbler have a smaller volume.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is an axonometric view of the new rotary switching bubbler.

Fig. 2 is the first exploded view of the new rotary switching bubbler.

Fig. 3 is the first exploded view of the new rotary switching bubbler in a rotating section.

Fig. 4 is an axonometric view of the new rotary switching bubbler in a rotating section.

Fig. 5 is a second exploded view of the new rotary switching bubbler in a rotating section.

Marks in the figure: 1-diffuser component, 2-sealing gasket, 3-second diffuser, 4-first diffuser, 5-connector, 6-installation part, 7-seal, 8-water diversion Plate, 9-rotating frame, 10-rectifier, 11-water outlet network, 12-water inlet port, 13-first buffer chamber, 14-water outlet port, 15-first water diversion hole, 16-first water flow channel, 17-the second water diversion hole, 18-the second water flow channel.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is some embodiments of the present invention, but not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. Accordingly, the following detailed description of the embodiments of the invention, provided in the accompanying drawings, is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

As shown in FIG. 1 to FIG. 5 , the embodiment of the present invention provides a new rotary switching bubbler, which includes a connecting head 5 , a rotating frame 9 , a water dividing plate 8 and a sealing member 7 . The connection head 5 is provided with a water inlet port 12 and a water outlet port 14 . The swivel frame 9 is rotatably connected with the connecting head 5, and a first water flow channel 16 and a second water flow channel 18 are arranged on it. The water diversion plate 8 is provided with a first water diversion hole 15 communicated with the first water flow channel and a second water diversion hole 17 communicated with the second water flow channel. The water diversion plate 8 is installed on the rotating frame 9 and rotates together with the rotating frame 9 so that the water outlet port 14 of the connecting head 5 communicates with the first water diversion hole 15 or the second water diversion hole 17 . Corresponding to the water outlet port 14, the connector 5 is provided with an installation part 6 of a seal 7, and the seal 7 is arranged on the installation part 6 to send water from the connector 5 to the first water diversion plate 8 in a sealed manner. In the hole 15 or the second water diversion hole 17.

Specifically, the first water diversion hole 15 of the water diversion plate 8 communicates with the first water flow channel of the rotary frame 9 , and the second water diversion hole 17 communicates with the second water flow channel of the rotary frame 9 . The water outlet port 14 of the connecting head 5 is sealed and connected to the water dividing plate 8 through the sealing member 7 . By rotating the rotating frame 9 , the water outlet port 14 of the connecting head 5 is switched to be connected to the first water diversion hole 15 and the second water diversion hole 17 . Thereby switching between different water outlet modes. The setting of the water diversion plate 8 makes the connection head 5 only need to set one or a group of water outlet ports 14 to switch between different water channels, which greatly simplifies the internal structure of the bubbler and makes the volume of the bubbler smaller.

The first water diversion hole 15 and the second water diversion hole 17 are arranged on the water diversion plate 8 , and the corresponding first water flow channel 16 and second water flow channel 18 are arranged on the rotating frame 9 . When the swivel frame 9 is rotated, the water outlet port 14 of the connection head 5 can be switched and connected to the first water distribution hole 15 and the second water distribution hole 17 to realize different water outlet modes. On the connection head 5, the first water distribution hole 15 and the second water distribution hole 17 connected to the water distribution plate 8 are switched through the same water outlet port 14, which greatly simplifies the structure of the connection head 5, so that the bubbler has a smaller volume.

As shown in Figures 2 to 5, on the basis of the above embodiments, in an alternative embodiment of the present invention, the sealing member 7 is a leather cup. The installation part 6 is a hollow column protruding downward, and the leather cup is installed in the hollow column and is in contact with the water dividing plate 8 . Specifically, the leather cup can seal and connect the water outlet port 14 to the water diversion plate 8 with a small contact area, thereby reducing the torque required for the rotation of the rotating frame 9, which has good practical significance. Moreover, installing the cup through a hollow column extending downward instead of thickening the bottom of the connecting head 5 can effectively reduce the quality of the material used in the connecting head 5 , thereby reducing production costs.

As shown in Figures 2, 3 and 5, on the basis of the above-mentioned embodiment, in an optional embodiment of the present invention, the water inlet of the first water diversion hole 15 and the water inlet of the second water diversion hole 17 are distributed circumferentially at intervals , the water outlets of the first water distribution holes 15 are circumferentially distributed around the water outlets of the second water distribution holes 17 . The water dividing plate 8 is provided with a plurality of first water dividing holes 15 and a plurality of second water dividing holes 17, and the first water dividing holes 15 and the second water dividing holes 17 are distributed at intervals in the circumferential direction. The connecting head 5 is provided with a plurality of water outlet ports 14, and the water outlet ports 14 are distributed circumferentially. Specifically, the sum of the numbers of the first water diversion holes 15 and the second water diversion holes 17 is an even multiple of the water outlet ports 14 , and the intervals are uniformly distributed on the water diversion plate 8 . A plurality of water outlet ports 14 are evenly distributed on the connector head 5 . The swivel frame 9 is rotated at a certain angle, so that the first water diversion hole 15 is rotated to the position of the second water diversion hole 17, so that the switch of the water outlet mode can be realized. When the number of the first water diversion hole 15 and the second water diversion hole 17 is more, the rotation angle required to switch the water outlet mode is smaller.

In this embodiment, there are 4

water outlet ports

14 , 8 first water diversion holes 15 , and 8 second water diversion holes 17 . In other embodiments, the number of water outlet ports 14 can be set to eight. In other embodiments, other numbers may also be set, which is not specifically limited in the present invention.

On the basis of the above embodiments, in an optional embodiment of the present invention, the water outlet direction of the first water diversion hole 15 and the water outlet direction of the second water diversion hole 17 form an included angle. As shown in Figure 4, the diameters of the water inlets of the first water diversion hole 15 and the second water diversion hole 17 are the same, and the diameters of the pitch circles distributed on the circumference of the water diversion plate 8 are the same, so that they can be switched when rotating Connect to outlet port 14. It should be noted that the diameters of the water outlets of the first water diversion hole 15 and the second water diversion hole 17 are the same, but the diameters of the pitch circles distributed circumferentially on the water diversion plate 8 are different.

It can be understood that the second water flow channel 18 is arranged in the middle on the rotating frame 9 , and the circumference of the second water flow channel 18 is distributed on the outer periphery of the second water flow channel 18 . By setting the pitch circle diameter of the water outlet of the first water diversion hole 15 on the water diversion plate 8 to be larger than the pitch circle diameter of the water outlet of the second water diversion hole 17 on the water diversion plate 8 . The first water diversion hole 15 can communicate with the first water flow channel 16 , and the second water diversion hole 17 can communicate with the second water flow channel 18 .

The line connecting the central point of the water inlet and the central point of the water outlet of the first water diversion hole 15 and the axis of the bubbler is a first included angle. The line connecting the central point of the water inlet and the central point of the water outlet of the second water diversion hole 17 and the axis of the bubbler is a second included angle. The included angle between the first water diversion hole 15 and the second water diversion hole 17 is 10° to 60°. Specifically, the difference between the first included angle and the second included angle is only the included angle between the first water diversion hole 15 and the second water diversion hole 17. Preferably, the included angle is one of 10 degrees, 15 degrees, 25 degrees, 30 degrees, 45 degrees, 50 degrees, 60 degrees and 70 degrees.

As shown in Figures 3 to 5, on the basis of the above-mentioned embodiment, in an optional embodiment of the present invention, the diameters of the water outlets of the first water diversion hole 15 and the second water diversion hole 17 are smaller than the diameter of the water inlet, so that Both the first water diversion hole 15 and the second water diversion hole 17 have a frustoconical geometric structure. Specifically, the first water diversion hole 15 and the second water diversion hole 17 are arranged in a conical geometric structure, so that the side of the first water diversion hole 15 away from the axis of the bubbler is in a vertical state, and the second water diversion hole 17 The side near the axis of the bubbler is in a vertical state. Therefore, in the production process, the mold can be drawn directly from the vertical direction, the mold structure is simpler, and the production cost is lower, which has good practical significance.

In other embodiments, the calibers of the water inlet and the water outlet can be set to be the same, and a slider is set on the mold, so that an angle can be formed between the first water diversion hole 15 and the second water diversion hole 17, To communicate with the first water flow channel 16 and the second water flow channel 18 respectively. The present invention does not limit the specific shape of the water diversion hole, as long as one end can be switchably connected to the water outlet port 14 and the other end can be connected to the first water flow channel 16 and the second water flow channel 18 respectively.

As shown in Figures 4 and 5, on the basis of the above embodiments, in an optional embodiment of the present invention, the bubbler also includes a diffuser assembly 1, which is arranged on the connector 5 to form a first buffer cavity 13 , and the water outlet port 14 communicates with the first buffer cavity 13 . Through the diffuser assembly 1, the impact force of the water flow can be greatly reduced, making the sparkling water softer, which has good practical significance.

In this embodiment, the middle part of the diffuser component 1 is provided with a first through hole through which water flows through, and an upward protrusion is provided below the first through hole, and the protrusion is in the shape of a cone. The water outlet of the diffuser assembly 1 is arranged in the middle, and the water outlet port 14 of the connecting head 5 is arranged at the circumference, and the water flow needs to diffuse from the middle to the outside, thereby slowing down the impact force of the water flow. On the connecting head 5, a cone-shaped protrusion is provided at the position facing the water outlet of the diffuser assembly 1, which can make the flow of the water flow more soft and will not cause impact on the inside of the bubbler, which has good practical significance. Specifically, the included angle of the upward convex portion is 100° to 140°, preferably 125°, 126° or 127°. Preferably, an arc-shaped transition is provided on the top of the upward raised portion.

As shown in FIG. 4 , on the basis of the above-mentioned embodiments, in an alternative embodiment of the present invention, the diffuser assembly 1 includes a first diffuser 4 disposed on the connecting head 5 . A first buffer cavity 13 is formed between the first diffuser 4 and the connector 5. The first diffuser 4 is provided with at least one first through hole for connecting the water inlet port 12 and the first buffer chamber 13 . The first through hole and the water outlet port 14 are misaligned. Preferably, the diffuser assembly 1 further includes a second diffuser 3 configured on the first diffuser 4 . A second buffer cavity is formed between the second diffuser 3 and the first diffuser 4 . The second diffuser 3 is provided with at least one second through hole communicating with the second buffer cavity and the water inlet port 12 . The first through hole communicates with the first buffer chamber 13 and the second buffer chamber, and the diameter of the first through hole is larger than the diameter of the second through hole. It can be understood that the diffuser assembly 1 further includes a sealing gasket 2 arranged on the second diffuser sheet, so as to make a sealed connection with the external object when the connector 5 is arranged on the external object.

Specifically, the second diffuser generally has a cone-shaped structure to reduce the impact of the water flow. And a large number of second through holes with small diameters are arranged on the second diffuser. The first diffuser is roughly plate-shaped, and a first through hole is arranged in the middle. The diameter of the first through hole is much larger than that of the second through hole. The water flow enters through the first through hole with a small diameter, flows out from the first through hole with a large diameter, and achieves a buffer for the water flow through the diameter difference. The water flows in from the first through hole arranged in the middle, and flows out from the water outlet port 14 arranged in the circumference, and the water flow is buffered for the second time through the dislocation arrangement. Through two buffers, the water output from the bubbler is softer, which has good practical significance.

As shown in Figure 4, on the basis of the above embodiments, in an optional embodiment of the present invention, the first water flow channel 16 is circumferentially arranged around the second water flow channel 18 on the rotating frame 9, the first water flow channel 16, the second water flow channel The two water flow channels 18 and the lower surface of the water separating plate 8 form an air suction path. Specifically, a gap is provided between the bottom of the water dividing plate 8 and the rotating frame 9, so that when the first water flow channel 16 discharges water, air can be sucked in from the second water flow channel 18 through the gap to form bubble water. And a rectifying piece 10 is arranged in the first water outlet channel, so that the water outlet is more gentle. When the second water flow channel 18 is out of water, air can be sucked in from the first water flow channel 16 through the gap, and a water outlet net 11 is arranged in the second water outlet channel to realize another mode of sparkling water.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

A novel rotary switching bubbler is characterized in that it comprises:

A connector (5), which is provided with a water inlet port (12) and a water outlet port (14);

a rotating frame (9), the rotating frame (9) is rotatably connected to the connecting head (5), and a first water flow channel (16) and a second water flow channel (18) are arranged on it;

A water diversion plate (8), on which a first water diversion hole (15) communicated with the first water flow channel and a second water diversion hole communicated with the second water flow channel are provided on the water diversion plate (8) (17); the water dividing plate (8) is installed on the rotating frame (9), rotates together with the rotating frame (9) so that the water outlet port (14) of the connecting head (5) is switched and communicated with the Describe the first water distribution hole (15) or the second water distribution hole (17);

A mounting part (6) of a seal (7) is provided on the connector (5) corresponding to the water outlet port (14), and the seal (7) is arranged on the mounting part (6) to seal the water From the connection head (5) to the first water distribution hole (15) or the second water distribution hole (17) of the water distribution plate (8) in a sealed manner.
The novel rotary switching bubbler according to claim 1, characterized in that the water outlet direction of the first water diversion hole (15) and the water outlet direction of the second water diversion hole (17) form an included angle.
A novel rotary switching bubbler according to claim 2, characterized in that the included angle is 10° to 60°.
A novel rotary switching bubbler according to claim 3, wherein the included angle is one of 10 degrees, 15 degrees, 25 degrees, 30 degrees, 45 degrees, 50 degrees, 60 degrees, and 70 degrees. A sort of.
A novel rotary switching bubbler according to claim 1, characterized in that it also includes a diffuser component (1), the diffuser component (1) is arranged on the connecting head (5), and forms a second A buffer chamber (13), the water outlet port (14) communicates with the first buffer chamber (13).
According to claim 5, a new type of rotary switching bubbler, characterized in that, the middle part of the diffuser assembly (1) is provided with a first through hole for water flow to pass through, and a first through hole is provided below the first through hole. There is an upward raised portion, and the raised portion is tapered;

The diffuser assembly (1) includes a first diffuser (4) disposed on the connector (5); a gap is formed between the first diffuser (4) and the connector (5) The first buffer chamber (13); the first diffuser (4) is provided with at least one first through hole for connecting the water inlet port (12) and the first buffer chamber (13); The first through hole and the water outlet port (14) are misaligned;

The diffuser assembly (1) further includes a second diffuser (3) configured on the first diffuser (4); the second diffuser (3) and the first diffuser (4) A second buffer chamber is formed between them; the second diffuser (3) is provided with at least one second through hole communicating with the second buffer chamber and the water inlet port (12); the The first through hole communicates with the first buffer cavity (13) and the second buffer cavity, and the diameter of the first through hole is larger than the diameter of the second through hole.
A novel rotary switching bubbler according to claim 1, characterized in that, the sealing member (7) is a leather cup; the installation part (6) is a hollow column protruding downwards, and the leather cup A bowl is mounted in the hollow column and is in contact with the water dividing plate (8).
According to any one of claims 1 to 7, a novel rotary switching bubbler is characterized in that, the connecting head (5) is provided with a plurality of water outlet ports (14), and the water outlet ports (14) Circumferential distribution;

The water dividing plate (8) is provided with a plurality of first water dividing holes (15) and a plurality of second water dividing holes (17), and the first water dividing holes (15) and the second water dividing holes ( 17) distributed at intervals in the circumferential direction.
A novel rotary switching bubbler according to any one of claims 1 to 7, characterized in that the water inlet of the first water diversion hole (15) and the water inlet of the second water diversion hole (17) The water inlets are distributed at intervals in the circumferential direction, and the water outlets of the first water diversion holes (15) are circumferentially distributed around the water outlets of the second water diversion holes (17).
A new type of rotary switching bubbler according to any one of claims 1 to 7, characterized in that, the first water flow channel (16) surrounds the second water flow channel on the rotating frame (9) (18) Arranged circumferentially, the first water flow channel (16), the second water flow channel (18) and the lower surface of the water dividing plate (8) form an air suction path.