CN108209665B - Rotary spray head and self-cleaning bathtub - Google Patents

Abstract

A rotary spray head and a self-cleaning bathtub comprise a bracket and a spray nozzle, wherein the bracket is provided with a water inlet, and the spray nozzle is arranged on the bracket and is communicated with the water inlet; the rotary driving assembly is also included; one end of the rotary driving component is inserted into the bracket; one end of the nozzle is in axial sliding fit with one end of the rotary driving component and can be driven to rotate, the other end of the nozzle is provided with an arc-shaped water guide surface, and at least one lug is arranged on the arc-shaped water guide surface to output curved surface cleaning water. The rotary spray head and the self-cleaning bathtub have stronger flushing capability, are suitable for cleaning plane products, and have good effect of cleaning products with cambered surfaces.

Description

Rotary spray head and self-cleaning bathtub

Technical Field

The invention relates to the field of bathroom sanitary equipment, in particular to a rotary nozzle and a self-cleaning bathtub.

Background

With the faster and faster pace of life, the pressure of office workers is increasing, and many people like to soak hot water after going to work to relieve the work fatigue of one day, but the cleaning work of the bathtub brings inconvenience to busy people. Most users can firstly use the shower to wash the bathtub before using the bathtub, and the dust, the scale and the like on the surface of the bathtub are washed clean. After the bath is finished, some users can wash the bath after the bath is drained, so that the soapy water or bath water is prevented from being adhered to the surface of the bath. However, since the drain time is several minutes, some users may not wait, and often forget to wash the bath, the surface of the bowl becomes dirty and darkens over time.

At present, some bathtub cleaning brushes or other external cleaning equipment are mainly used for cleaning in the market, and a user is required to firstly use a shower to clean the surface of the bathtub and then use the cleaning brushes to further clean the surface of the bathtub. The massage bathtub on the market is mainly a hydraulic massage shower nozzle or a bubble shower nozzle, and is temporarily not used for cleaning the surface of the bathtub or a device built in the bathtub, but the shower nozzle in the prior art has a water spraying range of only 400-500mm, can not be used on the bathtub to realize a complete cleaning function, has a limited cleaning effect on the cambered surface of the bathtub, and has a cleaning water section close to a straight line, forms a certain angle with the cambered surface of the bathtub, and can not be cleaned in place, as shown in fig. 32.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides the rotary spray head and the self-cleaning bathtub which are simple in structure, easy to realize, large in cleaning area and good in effect.

The invention adopts the following technical scheme:

a rotary spray head comprises a bracket and a nozzle, wherein the bracket is provided with a water inlet, and the nozzle is arranged on the bracket and is communicated with the water inlet; the method is characterized in that: the rotary driving assembly is also included; one end of the rotary driving component is inserted into the bracket; one end of the nozzle is in axial sliding fit with the end of the rotary driving component and can be driven to rotate, the other end of the nozzle is provided with an arc-shaped water guide surface, and at least one lug is arranged on the arc-shaped water guide surface for outputting.

Preferably, the nozzle comprises a rotating sleeve, a connecting sleeve and a water guide plate; the rotating sleeve is sleeved outside one end of the rotary driving assembly to form a gap with the rotary driving assembly, and a plurality of through holes are formed in the side part of the rotating sleeve; the water inlet end of the connecting sleeve is fixedly connected with the rotating sleeve and is provided with a limiting groove for inserting the corresponding end of the rotary driving assembly; the water guide plate is fixedly sleeved at the water outlet end of the connecting sleeve, and the arc-shaped water guide surface is arranged on the inner side of the water guide plate.

Preferably, the inner side of the water guide plate is provided with a bulge so as to be embedded into the water inlet end of the connecting sleeve, and the arc-shaped water guide surface extends along the radial direction of the bulge and forms a water spray port with the water outlet end of the connecting sleeve.

Preferably, the projection extends radially outwardly of the nozzle and has a progressively increasing height.

Preferably, the height of the outer ends of the convex blocks is gradually reduced along two sides from the middle part.

Preferably, the lug is positioned at the middle and/or the side part of the arc-shaped water guide surface.

Preferably, the device further comprises a fixing sleeve and an elastic piece, wherein the fixing sleeve is fixed on the bracket and sleeved on the periphery of the nozzle, and the fixing sleeve is respectively in sealing fit with the bracket and the nozzle; the elastic piece is propped between the fixing sleeve and the corresponding end of the nozzle.

Preferably, the rotary driving assembly is provided with a transmission pin, a reduction gear and a motor unit; the bracket is provided with a mounting groove; the motor group is provided with an output gear; the speed reducing gear is meshed with the output gear, one end of the transmission pin is fixedly connected with the speed reducing gear, the other end of the transmission pin penetrates through the mounting groove and is provided with a flat part, and the flat part is axially matched with the nozzle in a sliding manner; the nozzle is in clearance fit with the outer wall of the mounting groove.

The utility model provides a self-cleaning bathtub, includes bathtub body, its characterized in that: the device also comprises a main control circuit, at least one cleaning pipeline and at least one rotary spray head of any one of the above; the cleaning pipeline is provided with a control valve for controlling on-off; the rotary spray head is fixed on the bathtub body, and the water inlet is communicated with the cleaning pipeline; the main control circuit is connected with the control valve and the rotary driving assembly to control the cleaning to be opened or closed.

Preferably, the bathtub body is provided with a mounting hole and further comprises a guide sleeve, and the guide sleeve is fixed on the mounting hole; the nozzle is arranged in the guide sleeve in a penetrating way, so that the end face of the nozzle protrudes out of the end face of the guide sleeve or is leveled with the end face of the guide sleeve when the guide sleeve is opened or closed for cleaning.

As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. the rotary spray head and the bathtub are characterized in that the spray nozzle is provided with the arc-shaped water guide surface, the arc-shaped water guide surface is provided with at least one lug for outputting curved surface cleaning water, the curved surface cleaning water comprises a curved surface and a fan-shaped surface, the flushing capability is stronger, and the curved surface cleaning water can be clung to a plane and a cambered surface, so that the cleaning effect of products with the plane and the cambered surface is good.

2. The rotary spray head and the bathtub are provided with a transmission pin assembly, an elastic piece and the like, the spray nozzle is sleeved on the transmission pin assembly and in clearance fit with the transmission pin assembly, when the cleaning is started, the spray nozzle moves outwards under the action of water pressure, and then the spray nozzle is driven to rotate for a certain angle to output curved surface cleaning water; when the cleaning is finished, the elastic piece drives the nozzle to return, manual spraying and cleaning are not needed, and the automatic cleaning device has the advantages of automatic cleaning, large cleaning area, good effect and automatic closing after the cleaning is finished.

3. The invention relates to a rotary spray head and a bathtub, wherein a spray nozzle comprises a rotary sleeve, a connecting sleeve, a water guide plate and the like; the rotating sleeve and the transmission pin assembly form a gap, a plurality of through holes are formed in the side part of the rotating sleeve, and a flange is arranged at the end part of the rotating sleeve, so that water pressure acts on the flange to drive the nozzle to move, and the realization is easy.

4. In the rotary spray head and the bathtub, the water flow can also automatically clean the inside of the spray nozzle in the outward and inward moving process of the spray nozzle, so that dirt is avoided.

5. According to the rotary shower nozzle and the bathtub, the connecting sleeve is provided with the limiting groove, the transmission pin is provided with the flat part, the flat part is inserted into the limiting groove to realize axial sliding, and the connecting sleeve can be driven to rotate to realize the functions of moving and rotating the nozzle.

6. According to the rotary spray head and the bathtub, the inner side of the water guide plate is provided with the arc-shaped water guide surface which extends radially, the arc-shaped water guide surface and the water outlet end of the connecting sleeve form the water spray opening, and curved surface cleaning water is sprayed out, so that the cleaning area is enlarged, and the good cleaning effect is ensured.

7. According to the rotary spray head and the bathtub, the transmission pin is provided with the convex part, the mounting groove of the bracket is correspondingly provided with the two stop blocks to limit the rotation angle of the convex part, the rotation angle of the spray nozzle is further limited, and the maximum cleaning range is ensured.

8. The rotary spray head and the bathtub are provided with the guide sleeve, the spray nozzle penetrates through the guide sleeve so that the end face of the spray nozzle protrudes outwards from the end face of the guide sleeve or is leveled with the end face of the guide sleeve when the spray nozzle is opened or closed for cleaning, the height of the guide sleeve exposed out of the bathtub is only 1-3mm, and the guide sleeve is neat and attractive in appearance and does not scratch a human body or maintenance appliance.

Drawings

FIG. 1 is a perspective view of a rotary sprayer of the invention;

FIG. 2 is a perspective view of a water deflector according to the present invention;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a side view of a rotary sprayer of the invention;

FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;

FIG. 6 is a B-B cross-sectional view of FIG. 4;

FIG. 7 is a schematic diagram of a rotary drive assembly;

FIG. 8 is a cross-sectional view of the rotary drive assembly;

FIG. 9 is a perspective view of a drive pin;

fig. 10 is a perspective view of a reduction gear;

FIG. 11 is a cross-sectional view of the drive pin assembly;

fig. 12 is a perspective view of a connecting sleeve;

FIG. 13 is a schematic view of the assembly of a drive pin and a connection sleeve;

FIG. 14 is a cross-sectional view of the drive pin and connection sleeve assembly;

FIG. 15 is a schematic view of the sliding of the connection sleeve along the drive pin;

FIG. 16 is a front view of the swivel case;

FIG. 17 is a perspective view of a swivel sleeve;

FIG. 18 is a perspective view of a swivel sleeve;

FIG. 19 is a perspective view of an L-shaped seal ring;

FIG. 20 is a cross-sectional view of an L-shaped seal ring;

FIG. 21 is a cross-sectional view of the connection of the rotating sleeve and the stationary sleeve;

FIG. 22 is a diagram of a reduction gear and motor pack drive;

fig. 23 is a perspective view of a bracket;

FIG. 24 is a front view of the bracket;

FIG. 25 is a schematic view of a protrusion abutting a baffle;

FIG. 26 is a schematic view of nozzle effluent;

FIG. 27 is a cross-sectional view of a water deflector;

FIG. 28 is a perspective view of a bathtub according to the present invention;

FIG. 29 is a schematic view of a bath wash area in accordance with the invention;

FIG. 30 is a C-C cross-sectional view of FIG. 29;

FIG. 31 is an enlarged view of a portion of FIG. 30;

FIG. 32 is a schematic view of the contact surface of the conventional cleaning water with the bathtub body;

FIG. 33 is a schematic view of the interface between the curved surface cleaning water and the bathtub body according to the present invention;

FIG. 34 is a control circuit diagram of the present invention;

wherein: 10. the water jet device comprises a bracket, 11, a mounting groove, 12, a water inlet, 13, an O-shaped sealing ring, 14, a copper bush, 15, a stop block, 20, a nozzle, 21, a rotating sleeve, 22, a connecting sleeve, 23, a water guide plate, 23a, a cover plate, 24, a nozzle sleeve, 25, a flange, 26, a through hole, 27, a limit groove, 28, a protruding part, 29, an arc-shaped water guide surface, 29a, a water jet, 29b, a protruding block, 30, a rotating driving component, 31, a shell, 32, an output gear, 33, a motor, 34, an upper cover, 35, a special-shaped frame, 36, a driving pin, 36a, a protruding part, 37, a reduction gear, 38, a flat part, 39, a water passing hole, 40, an elastic piece, 50, a fixed sleeve, 51, an L-shaped sealing ring, 52, a sliding cavity, 53, a flat pad, 60, a bathtub body, 61, a water overflow line, 62, a mounting hole, 70, a main control circuit, 71, a control main board, 72, a control panel, 73, an electromagnetic valve, 80, a guide sleeve, 81, an edge, 90 and a locking nut.

Detailed Description

The invention is further described below by means of specific embodiments.

Referring to fig. 1 to 27, a rotary spray head includes a bracket 10, a nozzle 20, a rotary driving assembly 30, an elastic member 40, a fixing sleeve 50, and the like. The bracket 10 is provided with an opening at one end and an inwardly extending mounting groove 11 at the other end, the side part is connected with a water inlet 12, and the water inlet 12 and the mounting groove 11 are communicated with the inner cavity of the bracket 10.

Fig. 7 to 11, the rotary drive assembly 30 includes a drive pin assembly, a motor group, a profile frame 35, and the like. The motor group comprises a shell 31, an output gear 32, a motor 33 and an upper cover 34, wherein the shell 31 is locked on a special-shaped frame 35. The motor 33 is fixed in the shell 31 by screws, the output shaft of the motor passes through the shell 31 and is fixedly connected with the output gear 32 to drive the motor to rotate, the upper cover 34 is sealed at the opening end of the shell 31 by screws, and the motor plays a role in protection by the shell 31 and the upper cover 34, so that the functions of dust prevention and water prevention are achieved. The rotary drive assembly of the present invention may also employ other transmission means, such as through impeller and gear set cooperation, etc.

The drive pin assembly comprises a drive pin 36 and a reduction gear 37, the reduction gear 37 is meshed with the output gear 32, and the rotation shafts of the reduction gear 37 and the output gear 32 are rotatably embedded in corresponding grooves of the special-shaped frame 35. One end of the transmission pin 36 is fixedly connected with the center of the reduction gear 37, the other end of the transmission pin penetrates through the mounting groove 11 of the bracket and is provided with a flat part 38, and the flat part 38 is also provided with two water passing holes 39. An O-shaped sealing ring 13 and a copper sleeve 14 are further arranged between the transmission pin 36 and the inner wall of the mounting groove 11, the O-shaped sealing ring 13 is sleeved on the transmission pin 36, the copper sleeve 14 is inserted into the mounting groove 11 and in interference fit with the mounting groove, and the copper sleeve 14 is sleeved outside the O-shaped sealing ring 13 to realize rotary sealing. In addition, two protrusions 36a extending outwards are further arranged on the side wall of the driving pin 36 near the flat part 38, and two stoppers 15 are correspondingly arranged on the end face of the mounting groove 11 to limit the rotation angle of the protrusions 36a, and the rotation angle determines the cleaning area of the water flow sprayed by the rotary nozzle, and referring to fig. 23-25.

Referring to fig. 12 to 21, the nozzle 20 includes a rotating sleeve 21, a connecting sleeve 22, a water guide plate 23, and a head sleeve 24. One end of the rotating sleeve 21 is provided with a flange 25 extending radially outwards, a plurality of through holes 26 are formed in the side portion, the through holes 26 extend axially along one end of the rotating sleeve 21, and the through holes 26 are oval. The rotating sleeve 21 is sleeved outside the mounting groove 11 and the flat part 38 and forms clearance fit with the outer wall of the mounting groove 11, and the clearance between the rotating sleeve 21 and the mounting groove 11 is smaller than the width of the flange 25. The water inlet end of the connecting sleeve 22 is fixedly connected with the rotating sleeve 21 through threaded fit, two limiting grooves 27 are formed in the inner wall of the connecting sleeve for inserting corresponding ends of the flat portions 38 of the transmission pins 36, limiting is achieved, and sliding fit is achieved between the connecting sleeve 22 and the flat portions 38.

The water guide plate 23 is fixedly sleeved on the water outlet end of the connecting sleeve 22 through a screw, the middle part of the inner side of the water guide plate is provided with a convex part 28, the water guide plate 23 is also provided with an arc-shaped water guide surface 29 which radially extends along the center of the convex part 28, and a certain distance is reserved between the arc-shaped water guide surface 29 and the water outlet end surface of the connecting sleeve 22 to form a water spray opening 29a. Referring to fig. 2, at least one protrusion 29b is further disposed on the arc-shaped water guiding surface 29, the protrusion 29b extends radially outward along the arc-shaped water guiding surface 29, the height of the protrusion is gradually increased, the height of the outer end of the protrusion 29b is gradually decreased from the middle along two sides, and the streamline structure is adopted to enable the water to flow through the arc-shaped water guiding surface 29 and the protrusion 29b to spray the curved surface cleaning water. The curved surface cleaning water comprises a combination of curved surfaces and sector surfaces, namely a product capable of cleaning a plane, and is also suitable for cleaning a product with an arc surface, and can be closely attached to the arc surface of the product to realize complete cleaning, as shown in fig. 33. The protruding blocks 29b may be located at the middle or side of the arc-shaped water guiding surface 29, and the number of the protruding blocks may be one or two, and may be set as required.

The spray nozzle sleeve 24 is sleeved outside the water outlet end of the connecting sleeve 22 and is close to the water guide plate 23. The nozzle 20 is further provided with a cover plate 23a which is fixed to the outside of the water guide plate 23 by screw-fitting.

The outer side of one end of the fixed sleeve 50 is fixed at the opening end of the bracket 10 through threaded fit, a flat pad 53 is sleeved at the threaded fit position to realize static seal, and the inner side of the end of the fixed sleeve 50 is sleeved at the peripheries of the rotating sleeve 21 and the connecting sleeve 22. An L-shaped sealing ring 51 is sleeved between the rotating sleeve 21 and the fixed sleeve 50, and the end part of the L-shaped sealing ring is provided with a lip edge which can be opened under the action of water pressure so as to realize axial and radial dynamic sealing. The other end of the fixed sleeve 50 is sleeved on the water outlet end of the connecting sleeve 22, and a sliding cavity 52 is arranged for guiding. The elastic member 40 is abutted between the flange 25 of the rotating sleeve 21 and the opposite end of the fixed sleeve 50, and is used for driving the nozzle 20 to return.

The rotary sprayer of the invention can move outwards along the flat part 38 under the action of water pressure, can be driven by the transmission pin 36 to rotate a certain angle to output curved surface cleaning water (see fig. 1 and 30, fig. 30 comprises the current cleaning surface and the total cleaning area, and the cleaning diameter is 800-1200 mm), and can drive the nozzle 20 to return through the elastic piece 40. During the outward and inward movement of the nozzle 20, the water flow also self-cleans the interior of the nozzle 20 from dirt.

Referring to fig. 28 to 31, and 33 and 34, the present invention further provides a self-cleaning bathtub, which comprises a bathtub body 60, a main control circuit 70, at least one cleaning pipeline and at least one rotary shower nozzle. The bath body 60 is provided with mounting holes 62 above the overflow line 61, the number of the mounting holes 62 corresponds to the number of the rotary spray heads one by one, the rotary spray heads are uniformly distributed around the bath, and the number of the rotary spray heads can be one, two, three or even more according to the shape, the size and the like of the bath. The location of the mounting hole 62 is not exclusive and may be located below the overflow line 61.

A control valve is provided on each of the purge lines, and a solenoid valve 73 may be used to control the on/off of the purge lines. The swivel spray heads are secured to the mounting holes 62 of the tub and the water inlet 12 communicates with the wash line, either with a wash line connecting multiple swivel spray heads or with a wash line connecting a swivel spray head, although this is not the only way.

A guide sleeve 80 and a locking surface 90 are also included for securing the rotary spray head to the mounting hole 62. The outer side of the guide sleeve 80 is in threaded fit with the inner wall of the mounting hole 62, one end of the guide sleeve 80 is provided with an edge 81 and sleeved with the flat pad 53, and the edge 81 extends inwards. The nozzle 20 is arranged in the guide sleeve 80 in a penetrating way, an O-shaped sealing ring 13 is sleeved outside the fixed sleeve 50 to form a static seal with the inner wall of the guide sleeve 80, and the fixed sleeve 50 is limited by the edge 81. The locking pavement 90 is sleeved at the other end of the guide sleeve 80, a flat pad 53 is also arranged between the locking pavement 90 and the inner wall of the bathtub, the rotary spray head can be locked on the mounting hole 62 of the bathtub body 60 by rotating the locking pavement 90, and static sealing is formed by the two flat pads 53. When the cleaning is opened or closed, the cover plate 23a of the end face of the nozzle 20 protrudes outwards from the end face of the guide sleeve 80 or is leveled with the end face of the guide sleeve 80, and the end face of the guide sleeve 80 protrudes only by 1-2mm from the surface of the bathtub, so that a user can wipe with a towel conveniently.

The main control circuit 70 includes a control main board 71 and a control panel 72, wherein the control main board 71 is connected with the electromagnetic valves 73 and the motor 33 of the rotary driving assembly 30 to control the opening or closing of the cleaning, the electromagnetic valves 73 are connected in parallel, the motors 33 are connected in parallel, and the action modes of the electromagnetic valves 73 and the motors 33 can be controlled by an internal program, for example, the cleaning nozzle 20 assemblies sequentially spray the curved surface cleaning water for cleaning, or the cleaning nozzle 20 assemblies simultaneously spray the curved surface cleaning water for cleaning. The control panel 72 is provided with a washing function key and is connected to the control main board 71 for inputting control commands. Taking an elliptical bathtub and four rotary spray heads as an example, four motors 33, four battery valves 73 and four cleaning pipelines are arranged, and the specific working principle is as follows:

normal state: the nozzle sleeve 24 on the end face of the nozzle 20 is leveled with the end face of the guide sleeve 80, and the spring drives the flange 25 of the rotating sleeve 21 to be close to the inner wall of the bottom of the mounting groove 11.

When the sequential cleaning function keys on the control panel 72 are pressed, the main control circuit 70 controls the electromagnetic valve 73 of the first rotary nozzle to open a corresponding cleaning water path, water flows into the bracket through the water inlet 12 of the rotary nozzle, water pressure acts on the flange 25 to push the nozzle 20 to move outwards along the flat part 38 of the transmission pin 36, the elastic piece 40 is compressed, the water spray opening 29a is exposed for 8mm, water flows into the connecting sleeve 22 through the through hole 26 and is sprayed out from the water spray opening 29a along the arc-shaped water guide surface 29, and curved surface cleaning water is generated; after the electromagnetic valve 73 is opened for 3 seconds, the corresponding motor 33 is controlled to start to rotate, the driving pin 36 drives the nozzle 20 to rotate for a certain angle until the convex part 36a abuts against the stop block 15, the curved surface cleaning water rotates for a certain angle to finish 180-degree cleaning, the motor 33 is blocked, the current is increased, an electric control signal is generated, the main board 71 is controlled to control the motor 33 to rotate reversely, the nozzle 20 is driven to rotate reversely, the curved surface cleaning water rotates reversely for a certain angle to finish 180-degree cleaning, then the motor 33 is controlled to stop working, and the electromagnetic valve 73 stops working; under the action of the elastic member 40, the nozzle 20 returns to the normal state.

So control second rotatory nozzle, third rotatory nozzle and fourth rotatory nozzle in proper order, after finishing, this cleaning function in proper order closes. The number of forward and reverse rotations in the cleaning process can be set and adjusted, and the cleaning sequence of the rotary spray head can be adjusted according to the actual cleaning effect. The main control circuit can also control the rotary spray heads to carry out batch water outlet, the quantity of the rotary spray heads for each batch of water outlet is smaller than the total quantity of the rotary spray heads, preferably 1-2 rotary spray heads, so that the phenomenon that water is supplied by the rotary spray heads for diversion due to simultaneous water outlet of the rotary spray heads, and the flushing effect is affected due to insufficient water pressure can be avoided. Referring to the cleaning area schematic of fig. 29 and 30, due to the coanda effect, water flow can climb along the inner wall of the tub to clean the bottom of the tub to the area not reached in fig. 29.

The foregoing is merely illustrative of specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by using the design concept shall fall within the scope of the present invention.

Claims (8)

1. A rotary spray head comprises a bracket and a nozzle, wherein the bracket is provided with a water inlet, and the nozzle is arranged on the bracket and is communicated with the water inlet; the method is characterized in that: the rotary driving assembly is also included; one end of the rotary driving component is inserted into the bracket; the nozzle comprises a nozzle body, a rotary driving assembly and at least one lug, wherein one end of the nozzle body is in axial sliding fit with the rotary driving assembly and can be driven to rotate, the other end of the nozzle body is provided with an arc-shaped water guide surface, at least one lug is arranged on the arc-shaped water guide surface to output curved surface cleaning water, the lug extends outwards along the radial direction of the nozzle body, the height of the lug is gradually increased, and the height of the outer end of the lug is gradually reduced from the middle along two sides.

2. A rotary sprayer according to claim 1, wherein: the nozzle comprises a rotating sleeve, a connecting sleeve and a water guide plate; the rotating sleeve is sleeved outside one end of the rotary driving assembly to form a gap with the rotary driving assembly, and a plurality of through holes are formed in the side part of the rotating sleeve; the water inlet end of the connecting sleeve is fixedly connected with the rotating sleeve and is provided with a limiting groove for inserting the corresponding end of the rotary driving assembly; the water guide plate is fixedly sleeved at the water outlet end of the connecting sleeve, and the arc-shaped water guide surface is arranged on the inner side of the water guide plate.

3. A rotary sprayer according to claim 2, wherein: the inner side of the water guide plate is provided with a bulge part for being embedded into the water inlet end of the connecting sleeve, and the arc-shaped water guide surface extends radially along the bulge part and forms a water spray port with the water outlet end of the connecting sleeve.

4. A rotary sprayer according to claim 1, wherein: the convex blocks are positioned at the middle part and/or the side parts of the arc-shaped water guide surface.

5. A rotary sprayer according to claim 1, wherein: the device also comprises a fixing sleeve and an elastic piece, wherein the fixing sleeve is fixed on the bracket and sleeved on the periphery of the nozzle, and the fixing sleeve is respectively matched with the bracket and the nozzle in a sealing way; the elastic piece is propped between the fixing sleeve and the corresponding end of the nozzle.

6. A rotary sprayer according to claim 1, wherein: the rotary driving assembly is provided with a transmission pin, a reduction gear and a motor unit; the bracket is provided with a mounting groove; the motor group is provided with an output gear; the speed reducing gear is meshed with the output gear, one end of the transmission pin is fixedly connected with the speed reducing gear, the other end of the transmission pin penetrates through the mounting groove and is provided with a flat part, and the flat part is axially matched with the nozzle in a sliding manner; the nozzle is in clearance fit with the outer wall of the mounting groove.

7. The utility model provides a self-cleaning bathtub, includes bathtub body, its characterized in that: further comprising a main control circuit, at least one cleaning line and at least one rotary nozzle according to any one of claims 1 to 6; the cleaning pipeline is provided with a control valve for controlling on-off; the rotary spray head is fixed on the bathtub body, and the water inlet is communicated with the cleaning pipeline; the main control circuit is connected with the control valve and the rotary driving assembly to control the cleaning to be opened or closed.

8. A self-cleaning bathtub as defined in claim 7, wherein: the bathtub body is provided with a mounting hole and also comprises a guide sleeve, and the guide sleeve is fixed on the mounting hole; the nozzle is arranged in the guide sleeve in a penetrating way, so that the end face of the nozzle protrudes out of the end face of the guide sleeve or is leveled with the end face of the guide sleeve when the guide sleeve is opened or closed for cleaning.

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