Shower head

Abstract

The present invention discloses a shower head spray, comprising a housing assembly, a water channel switching assembly, and a switching drive assembly; a water inlet channel and at least two water outlet channels are formed in the housing assembly, and a driving chamber is formed in the water inlet channel; the water channel switching assembly includes a water diversion plate arranged in the housing assembly, and the water diversion plate can rotate axially relative to the housing assembly to switch the water inlet channel to communicate with different water outlet channels; the switching drive assembly includes a piston and an elastic member, the piston is arranged in the driving chamber and can reciprocate between a first position and a second position, and the elastic member is used to provide elastic force for the piston to maintain the first position. Under the action of the water pressure of the water flowing into the driving chamber from the water inlet, the piston moves from the first position to the second position, driving the water diversion plate to rotate, thereby realizing water channel switching. The shower head spray can automatically switch the water outlet mode according to the change of the water pressure of the water inlet, without the need for manual switching, and has the advantages of simple structure, easy use, and good shower experience.

Description

Technical Field

[0001] The invention belongs to the technical field of bathroom equipment, and in particular relates to a shower head. Background Art

[0002] As an essential bathroom fixture, overhead showerheads bring immense convenience to people's lives. To meet the water usage needs of different users, overhead showerheads need to offer multiple water modes, such as massage, gentle, turbine, and powerful jet, with switchable modes. However, existing overhead showerheads with switchable water modes require manual operation, requiring users to lift their heads upwards. This makes switching inconvenient and significantly impacts the shower experience. Summary of the Invention

[0003] In view of the above problems, the present invention discloses a shower head spray to overcome the above problems or at least partially solve the above problems.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a shower head spray, comprising a housing assembly, a water channel switching assembly and a switching drive assembly;

[0006] A water inlet channel and at least two water outlet channels are formed in the housing assembly, a driving cavity is formed in the water inlet channel, and a water inlet and a water outlet are provided on the driving cavity that are connected to the water inlet channel, so that water in the water inlet channel flows through the driving cavity;

[0007] The water channel switching assembly includes a water diversion plate, which is arranged in the housing assembly and located between the water inlet channel and each of the water outlet channels. The water diversion plate can be axially rotated relative to the housing assembly to switch the water inlet channel to communicate with different water outlet channels.

[0008] The switching drive assembly includes a piston and an elastic member. The piston is arranged in the drive chamber and can reciprocate between a first position and a second position. The elastic member is used to provide elastic force for the piston to maintain the first position. Under the action of the water pressure flowing into the drive chamber from the water inlet, the piston moves from the first position to the second position, driving the water diversion plate to rotate, thereby realizing water channel switching.

[0009] Furthermore, the waterway switching assembly further comprises a main drive disc and a slave drive disc coaxially arranged;

[0010] The slave drive disk and the main drive disk are sequentially arranged above the water diversion disk from bottom to top. A first bevel tooth is provided on the lower end surface of the slave drive disk, and a second bevel tooth meshing with the first bevel tooth is provided on the upper end surface of the water diversion disk. The main drive disk is linked to the piston so that the piston can drive the water diversion disk to rotate in a preset direction through the main drive disk and the slave drive disk in sequence.

[0011] Furthermore, the switching drive assembly further includes a drive rod;

[0012] The driving rod is arranged on one side of the main driving disk and is fixedly connected to the piston. A driving groove or a driving protrusion is provided on the driving rod, and a driving protrusion or a driving groove that cooperates with the driving groove or the driving protrusion is provided on the outer circumference of the main driving disk.

[0013] Furthermore, the housing assembly includes a fixing seat;

[0014] The water diversion plate and the slave drive plate are arranged on the lower side of the fixed seat, the main drive plate is arranged on the upper side of the fixed seat, a first limiting protrusion is provided on the outer circumference of the main drive plate, and a second limiting protrusion and a third limiting protrusion are provided on the upper side surface of the fixed seat, and the first limiting protrusion is located between the second limiting protrusion and the third limiting protrusion.

[0015] Furthermore, a circumferential protrusion or a circumferential groove is provided on the lower end surface of the main drive disk, and a circumferential groove or a circumferential protrusion that cooperates with the circumferential protrusion or the circumferential groove is provided on the upper side surface of the fixing seat, so that the main drive disk can only rotate axially relative to the fixing seat.

[0016] Furthermore, a limit frame is provided on the fixed seat, and the limit frame is respectively abutted against the upper side of the driving rod and the side of the driving rod away from the driving groove or the driving protrusion, and a raised rib is provided on the upper side surface of the driving rod along the direction of the reciprocating motion of the piston.

[0017] Furthermore, the water inlet and the water outlet are arranged along the direction of the reciprocating motion of the piston, so that when the piston is in the first position, the piston blocks the connection between the water inlet and the water outlet, and when the piston is in the second position, the water inlet is connected to the water outlet.

[0018] Furthermore, the elastic member is a spring, a spring cover is fixed on the cavity body of the driving cavity, a receiving groove is provided at the rear end of the piston, the spring is located in the receiving groove and has a compressive preload force, one end of the spring abuts against the piston, and the other end of the spring abuts against the spring cover.

[0019] Furthermore, a guide groove is provided in the driving cavity, the front end of the piston is located in the guide groove, and the guide groove is used to guide the reciprocating motion of the piston.

[0020] Further, it also includes a steering assembly;

[0021] The steering assembly includes a spherical joint and a threaded sleeve, and the housing assembly includes a connecting seat. A connecting water channel is formed in the spherical joint, and a spherical cavity is provided on the connecting seat. The spherical joint is located in the spherical cavity, so that the water outlet end of the connecting water channel is connected with the water inlet end of the water inlet channel, and the threaded sleeve is mounted on the connecting seat through a threaded structure.

[0022] The advantages and beneficial effects of the present invention are:

[0023] In the shower head spray of the present invention, an axially rotatable water dividing plate is provided between the water inlet channel and each water outlet channel, and a piston connected to the water dividing plate is provided. The piston can overcome the elastic force of the elastic part to perform piston movement under the action of the water pressure of the water inlet in the driving chamber, thereby driving the water dividing plate to rotate, switching the water inlet channel to connect with different water outlet channels, so that the shower head spray can switch the water outlet mode according to the change of the water inlet pressure, without the need to manually switch the water outlet mode. The shower head spray has the advantages of simple structure, easy use and good shower experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0025] Figure 1 This is a three-dimensional structural diagram of a shower head in one embodiment of the present invention;

[0026] Figure 2 It is a front view of a shower head spray according to one embodiment of the present invention;

[0027] Figure 3 A top view of a shower head according to an embodiment of the present invention;

[0028] Figure 4 A vertical cross-sectional view of a shower head sprayer along the axis of the piston when the piston is in the second position according to an embodiment of the present invention;

[0029] Figure 5 A vertical cross-sectional view of a shower head along the axis of a spherical joint in one embodiment of the present invention;

[0030] Figure 6 for Figure 5 A partial enlarged view of .

[0031] In the figure: 1. driving chamber; 2. water inlet; 3. water outlet; 4. water distribution plate; 5. piston; 6. main driving plate; 7. slave driving plate; 8. driving rod; 9. driving groove; 10. driving protrusion; 11. fixing seat; 12. first limiting protrusion; 13. second limiting protrusion; 14. third limiting protrusion; 15. circumferential protrusion; 16. circumferential groove; 17. limiting frame; 18. raised rib; 19. spring cover; 20. spring; 21. receiving groove; 22. guide groove; 23. spherical joint; 24. threaded sleeve; 25. connecting seat; 26. connecting waterway. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] In one embodiment of the present invention, a shower head spray is disclosed, which includes a shell assembly, a water channel switching assembly and a switching drive assembly, and the water channel switching assembly and the switching drive assembly are arranged on the shell assembly; wherein, the water channel switching assembly is used for switching the water channel, that is, switching the water outlet mode of the shower head spray, and the switching drive assembly is used for driving the water channel switching assembly to switch the water channel.

[0035] Specifically, a water inlet channel and at least two water outlet channels are formed in the shell assembly, such as Figure 4 As shown, a driving chamber 1 is formed in the water inlet channel, and a water inlet 2 and a water outlet 3 connected to the water inlet channel are provided on the driving chamber 1, so that the water in the water inlet channel flows through the driving chamber 1, that is, the water in the upper section of the water inlet channel flows into the driving chamber 1 through the water inlet 2, and then the water in the driving chamber 1 flows into the lower section of the water inlet channel through the water outlet 3; wherein different water outlet channels correspond to different water outlet modes.

[0036] like Figures 4 to 6 As shown, the water channel switching assembly includes a water dividing plate 4, which is arranged in the shell assembly and is located between the water inlet channel and each water outlet channel, that is, the water in the water inlet channel passes through the water dividing plate 4 and then enters one of the water outlet channels. The water dividing plate 4 can rotate axially relative to the shell assembly to switch the water inlet channel to connect with different water outlet channels, thereby realizing the switching of different water outlet modes.

[0037] like Figure 4 As shown, the switching drive assembly includes a piston 5 and an elastic member. The piston 5 is disposed in the drive chamber 1 and can reciprocate between a first position and a second position. The elastic member is used to provide an elastic force to maintain the piston 5 in the first position. Under the action of the water pressure flowing into the drive chamber 1 from the water inlet 2, the piston 5 moves from the first position to the second position. The piston 5 is linked with the water diversion plate 4 to drive the water diversion plate 4 to rotate, thereby achieving water channel switching. That is, when the water flow entering the drive chamber 1 through the water inlet 2 through the water inlet 2 has water pressure, the water pressure will cause the piston 5 to overcome the elastic force of the elastic member and be pushed from the first position to the second position by the water pressure, thereby driving the water diversion plate 4 to rotate. When the water flow entering the drive chamber 1 through the water inlet 2 through the water inlet 2 has no water pressure, the elastic member will push the piston 5 from the second position to the first position. In this way, the water outlet mode can be switched by controlling the water pressure, making the switching of the shower head water outlet mode more convenient.

[0038] In summary, in the shower head spray of this embodiment, an axially rotatable water dividing plate is provided between the water inlet channel and each water outlet channel, and a piston connected to the water dividing plate is provided. The piston can overcome the elastic force of the elastic part to perform piston movement under the action of the water pressure of the water inlet in the driving chamber, thereby driving the water dividing plate to rotate, switching the water inlet channel to connect with different water outlet channels, so that the shower head spray can switch the water outlet mode according to the change of the water pressure of the water inlet, without the need to manually switch the water outlet mode. The shower head spray has the advantages of simple structure, easy use and good shower experience.

[0039] In this embodiment, if Figures 1 to 6 As shown, the waterway switching assembly further includes a main drive disc 6 and a slave drive disc 7 that are coaxially arranged, that is, the main drive disc 6 and the slave drive disc 7 are fixed on the same axis and can rotate synchronously.

[0040] Specifically, the slave drive disc 7 and the main drive disc 6 are sequentially arranged above the water diversion disc 4 from bottom to top. A first beveled tooth is provided on the lower end surface of the slave drive disc 7, and a second beveled tooth meshing with the first beveled tooth is provided on the upper end surface of the water diversion disc 4. The main drive disc 6 is linked to the piston 5. Thus, when the piston reciprocates, it drives the main drive disc 6 to rotate, which in turn drives the slave drive disc 7 to rotate via the main drive disc 6. Finally, the slave drive disc 7 drives the water diversion disc 4 to rotate via the meshing of the first beveled tooth and the second beveled tooth. Because the slave drive disc 7 and the water diversion disc 4 are connected via the beveled teeth, the slave drive disc 7 can only drive the water diversion disc 4 to rotate in one direction, thereby enabling the piston 5 to drive the water diversion disc 4 to rotate in a preset direction via the main drive disc 6 and the slave drive disc 7 in sequence.

[0041] And, as Figures 1 to 4 As shown, the switching drive assembly further includes a drive rod 8 .

[0042] A drive rod 8 is disposed on one side of the main drive disk 6 and is fixedly connected to the piston 5. The drive rod and piston can be integrally formed, or they can be fixedly connected by screws, clamping, or bonding. A drive groove 9 is defined in the drive rod 8, and a drive protrusion 10 is provided on the outer circumference of the main drive disk 6 to engage with the drive groove 9. When the piston 5 reciprocates, it drives the drive rod 8 to reciprocate. The drive rod 8, in turn, drives the main drive disk 6 to rotate through the engagement of the drive groove 9 and the drive protrusion 10. Of course, in other embodiments, the positions of the drive groove and the drive protrusion can be interchanged.

[0043] In addition, if Figures 1 to 6 As shown, the housing assembly includes a fixing seat 11 .

[0044] The water diverter disc 4 and the slave drive disc 7 are arranged on the lower side of the fixed seat 11, the main drive disc 6 is arranged on the upper side of the fixed seat 11, and the connecting shaft between the main drive disc 6 and the slave drive disc 7 passes through the fixed seat 11. A first limiting protrusion 12 is provided on the outer circumference of the main drive disc 6, and a second limiting protrusion 13 and a third limiting protrusion 14 are provided on the upper side of the fixed seat 11. The first limiting protrusion 12 is located between the second limiting protrusion 13 and the third limiting protrusion 14, so that the first limiting protrusion 12 can only move between the second limiting protrusion 13 and the third limiting protrusion 14, so that the main drive disc 6 can only rotate within a certain range, thereby preventing the main drive disc 6 from driving the water diverter disc 4 to rotate excessively.

[0045] In addition, if Figure 6 As shown, the lower end surface of the main drive disk 6 is provided with a circumferential protrusion 15, and the upper side surface of the fixing seat 11 is provided with a circumferential groove 16 that cooperates with the circumferential protrusion 15. The cooperation between the circumferential protrusion 15 and the circumferential groove 16 can limit the position of the main drive disk 6, allowing the main drive disk 6 to rotate only axially relative to the fixing seat 11, and ensuring the stability of the rotation of the main drive disk 6. The positions of the circumferential protrusion and the circumferential groove are interchangeable. Of course, in other embodiments, the circumferential protrusion and the circumferential groove can also be provided on the upper end surface of the slave drive disk and the lower side surface of the fixing seat, which is also within the scope of protection of the present invention.

[0046] Further, if Figures 1 to 3 As shown, a limit frame 17 is provided on the fixed seat 11, and the limit frame 17 is respectively in contact with the upper side of the driving rod 8 and the side of the driving rod 8 away from the driving groove 9, so that the driving rod 8 can only move along the direction of the reciprocating motion of the piston 5. A raised rib 18 is provided on the upper side surface of the driving rod 8 along the direction of the reciprocating motion of the piston 5. The driving rod 8 contacts the limit frame 17 through the raised rib 18, which can reduce the effective area of ​​the driving rod 8 and the limit frame 17, thereby reducing the friction between the two.

[0047] In this embodiment, if Figure 4 As shown, the water inlet 2 and the water outlet 3 are arranged along the direction of the reciprocating motion of the piston 5. The water inlet 2 is arranged at a position close to the front end of the piston 5, and the water outlet 3 is arranged at a position away from the front end of the piston 5. When the piston 5 is in the first position, the sealing structure on the piston 5 is exactly located between the water inlet 2 and the water outlet 3, blocking the communication between the water inlet 2 and the water outlet 3. At this time, the shower head cannot spray water. The sealing structure can be a sealing ring. When the water flow entering the driving chamber 1 from the water inlet 2 has water pressure, the water pressure can push the piston 5 to move. When the piston 5 is in the second position, the water inlet 2 and the water outlet 3 are both located at the front end of the sealing structure on the piston 5, the water inlet 2 and the water outlet 3 are connected, and the shower head sprays water.

[0048] In addition, if Figure 1 、 Figure 2 and Figure 4 As shown, the elastic member is a spring 20, a spring cover 19 is fixed to the cavity of the drive chamber 1, and a receiving groove 21 is provided at the rear end of the piston 5. The spring 20 is located in the receiving groove 21 and has a compressive preload force, so that the spring 20 has sufficient elastic force to make the piston 5 in the first position when there is no water pressure. One end of the spring 20 abuts against the piston 5, and the other end of the spring 20 abuts against the spring cover 19. Of course, the elastic member can also be an elastic device such as a spring sheet.

[0049] And, as Figure 4 As shown, a guide groove 22 is provided in the driving chamber 1. The guide groove 22 is located at the front end of the piston 5, so that no matter whether the piston 5 is in the first position or the second position, the front end of the piston 5 is located in the guide groove 22. The guide groove 22 is used to guide the piston 5 to perform reciprocating motion.

[0050] Furthermore, the shower head also includes a steering assembly.

[0051] Specifically, if Figure 5 As shown, the steering assembly includes a spherical joint 23 and a threaded sleeve 24, and the shell assembly includes a connecting seat 25. A connecting water channel 26 is formed in the spherical joint 23, and a spherical cavity is provided on the connecting seat 25. The spherical joint 23 is located in the spherical cavity and can rotate in the spherical cavity. The angle of the spherical joint 23 in the spherical cavity can be adjusted, and then the angle of the shell assembly relative to the steering assembly can be adjusted to achieve steering adjustment of the shower head; when the spherical joint 23 is located in the spherical cavity, the water outlet end of the connecting water channel 26 is connected to the water inlet end of the water inlet channel, and the threaded sleeve 24 is sleeved on the connecting seat 25 through a threaded structure. When the angular position of the spherical joint 23 relative to the spherical cavity is adjusted, the relative fixation of the spherical joint 23 and the connecting seat 25 is achieved by tightening the threaded sleeve 24 on the connecting seat 25.

[0052] The working process of the shower head spray in the present invention is as follows:

[0053] When the shower head spray is discharging water normally, the water flow in the upper section of the water inlet channel enters the driving chamber through the water inlet, and provides water pressure to make the piston overcome the elastic force of the elastic part and move from the first position to the second position, so that the water inlet and the water outlet are connected. The water flow in the driving chamber can enter the lower section of the water inlet channel through the water outlet, and the water flow then passes through the water distribution plate and enters one of the water outlet channels. At this time, the shower head spray is in a certain water outlet mode.

[0054] When it is necessary to switch the water outlet mode, the water flow in the upper section of the water inlet channel is first cut off, so that the water pressure at the water inlet is zero. At this time, the water pressure in the driving chamber disappears, and the elastic member will push the piston from the second position to the first position, cutting off the connection between the water inlet and the water outlet. Then, the water flow in the upper section of the water inlet channel is opened again, and the water flow with water pressure flows into the driving chamber again, driving the piston to overcome the elasticity of the elastic member and move from the first position to the second position, so that the water inlet and the water outlet are connected. In the process of the piston moving from the first position to the second position, the piston will drive the driving rod to move axially, and drive the main driving disk to rotate through the driving rod. The main driving disk then drives the water diverter disk to rotate through the slave driving disk. After the water diverter disk rotates, the lower section of the water inlet channel is connected with the other water outlet channel. The water flow in the driving chamber enters the lower section of the water inlet channel and flows into the other water outlet channel. At this time, the shower head spray is in another water outlet mode.

[0055] In this way, the water spraying mode of the shower head can be switched by changing the water pressure of the water entering the driving cavity from the upper section of the water inlet channel.

[0056] The above description is only a specific embodiment of the present invention. Under the above teachings of the present invention, those skilled in the art may make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above description is only to better explain the purpose of the present invention, and the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. Shower head spray, characterized in that, It includes a shell assembly, a waterway switching assembly and a switching drive assembly; A water inlet channel and at least two water outlet channels are formed in the housing assembly, a driving chamber (1) is formed in the water inlet channel, and a water inlet (2) and a water outlet (3) are provided on the driving chamber (1) that are in communication with the water inlet channel, so that water in the water inlet channel flows through the driving chamber (1); The water channel switching assembly comprises a water distribution plate (4), the water distribution plate (4) being arranged in the housing assembly and located between the water inlet channel and each of the water outlet channels, the water distribution plate (4) being capable of axially rotating relative to the housing assembly to switch the water inlet channel to communicate with different water outlet channels; The switching drive assembly comprises a piston (5) and an elastic member. The piston (5) is arranged in the drive chamber (1) and can reciprocate between a first position and a second position. The elastic member is used to provide elastic force for the piston (5) to maintain the piston in the first position. Under the action of the water pressure of the water flowing into the drive chamber (1) from the water inlet (2), the piston (5) moves from the first position to the second position, driving the water distribution plate (4) to rotate, thereby realizing water channel switching. The waterway switching assembly further comprises a main drive disc (6) and a slave drive disc (7) which are coaxially arranged; The slave drive disc (7) and the main drive disc (6) are sequentially arranged above the water separation disc (4) from bottom to top; a first bevel tooth is provided on the lower end surface of the slave drive disc (7); a second bevel tooth meshing with the first bevel tooth is provided on the upper end surface of the water separation disc (4); the main drive disc (6) and the piston (5) are linked to each other, so that the piston (5) can sequentially drive the water separation disc (4) to rotate in a preset direction through the main drive disc (6) and the slave drive disc (7); The water inlet (2) and the water outlet (3) are arranged along the direction of the reciprocating motion of the piston (5), so that when the piston (5) is located at the first position, the piston (5) blocks the communication between the water inlet (2) and the water outlet (3); when the piston (5) is located at the second position, the water inlet (2) is connected to the water outlet (3).

2. The shower head according to claim 1, characterized in that: The switching drive assembly further includes a drive rod (8); The driving rod (8) is arranged on one side of the main driving disk (6) and is fixedly connected to the piston (5). A driving groove (9) or a driving protrusion is provided on the driving rod (8). A driving protrusion (10) or a driving groove that cooperates with the driving groove (9) or the driving protrusion is provided on the outer circumference of the main driving disk (6).

3. The shower head according to claim 2, characterized in that: The housing assembly includes a fixing seat (11); The water separation plate (4) and the slave drive plate (7) are arranged on the lower side of the fixing seat (11), and the main drive plate (6) is arranged on the upper side of the fixing seat (11). A first limiting protrusion (12) is provided on the outer circumference of the main drive plate (6), and a second limiting protrusion (13) and a third limiting protrusion (14) are provided on the upper side of the fixing seat (11). The first limiting protrusion (12) is located between the second limiting protrusion (13) and the third limiting protrusion (14).

4. The shower head according to claim 3, characterized in that: A circumferential protrusion (15) or a circumferential groove is provided on the lower end surface of the main drive disc (6), and a circumferential groove (16) or a circumferential protrusion that cooperates with the circumferential protrusion (15) or the circumferential groove is provided on the upper side surface of the fixing seat (11), so that the main drive disc (6) can only rotate axially relative to the fixing seat (11).

5. The shower head according to claim 3, characterized in that: A limit frame (17) is provided on the fixing seat, and the limit frame (17) is respectively in contact with the upper side of the driving rod (8) and the side of the driving rod (8) away from the driving groove (9) or the driving protrusion. A raised rib (18) is provided on the upper side surface of the driving rod (8) along the direction of the reciprocating motion of the piston (5).

6. The shower head according to claim 1, characterized in that: The elastic member is a spring (20), a spring cover (19) is fixed on the cavity of the driving cavity (1), a receiving groove (21) is provided at the rear end of the piston (5), the spring (20) is located in the receiving groove (21) and has a compressive preload force, one end of the spring (20) abuts against the piston (5), and the other end of the spring (20) abuts against the spring cover (19).

7. The shower head according to claim 1, characterized in that: A guide groove (22) is provided in the driving chamber (1), and the front end of the piston (5) is located in the guide groove (22). The guide groove (22) is used to guide the reciprocating motion of the piston (5).

8. The shower head according to any one of claims 1 to 7, characterized in that: Also included are steering components; The steering assembly comprises a spherical joint (23) and a threaded sleeve (24); the housing assembly comprises a connecting seat (25); a connecting water channel (26) is formed in the spherical joint (23); a spherical cavity is provided on the connecting seat (25); the spherical joint (23) is located in the spherical cavity, so that the water outlet end of the connecting water channel (26) is connected to the water inlet end of the water inlet channel; the threaded sleeve (24) is sleeved on the connecting seat (25) through a threaded structure.

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