CN215762082U - Water supply installation and towards tooth ware - Google Patents

Abstract

The application provides a water supply installation and towards tooth ware relates to life electrical apparatus technical field. The water supply device comprises a water storage tank and a water pumping mechanism; the water pumping mechanism comprises a pump body assembly, a piston assembly and a power assembly, the pump body assembly comprises a pump body, an accommodating space is arranged in the pump body, the piston assembly is arranged in the pump body and located in the accommodating space, the accommodating space is divided into a water pumping cavity and a backflow cavity by the piston assembly, and the power assembly is connected with the piston assembly; the pump body also comprises a water inlet, a water outlet and a water return port, the water inlet and the water outlet are both communicated with the water pumping cavity, and the water return port is communicated with the backflow cavity; wherein, the water inlet is connected with the water storage tank through a water inlet pipe, and the water return port is connected with the water storage tank through a water return pipe. The application provides a water supply installation has avoided the water of pump body leakage to lead to towards the problem of tooth ware internal circuit short circuit and hardware corrosion effectively, increase of service life.

Description

Water supply installation and towards tooth ware

Technical Field

The application relates to the technical field of household appliances, in particular to a water supply device and a tooth flushing device.

Background

The tooth flusher is used as an auxiliary tool for cleaning the oral cavity, and is used for cleaning teeth and tooth gaps by means of pulse water flow impact. The hydraulic pressure required to rinse off the teeth and the foreign bodies in the crevices of the teeth can be relatively high.

The existing tooth flusher mainly utilizes a motor to drive an eccentric gear to rotate and then drive a piston in a pump body to carry out reciprocating motion so as to spray water to a nozzle of the tooth flusher, thereby achieving the purpose of flushing teeth.

However, under long-term use, in addition to wash water pressure big, after the long-term friction of piston and pump body, the piston can wear and tear or warp, and then leads to the pump body the phenomenon of leaking to appear, and the water of leaking can directly get into inside the tooth ware of washing, leads to internal circuit short circuit and hardware corrosion, seriously influences the life who washes the tooth ware.

SUMMERY OF THE UTILITY MODEL

For overcoming not enough among the prior art, the application provides a water supply installation and towards tooth ware for pump body leaks among the solution prior art, leads to towards the problem of tooth ware internal circuit short circuit and hardware corrosion.

In order to achieve the above object, in a first aspect, the present application provides a water supply device, including a water storage tank and a water pumping mechanism;

the water pumping mechanism comprises a pump body assembly, a piston assembly and a power assembly, wherein the pump body assembly comprises a pump body, an accommodating space is arranged in the pump body, the piston assembly is arranged in the pump body and is positioned in the accommodating space, the accommodating space is divided into a water pumping cavity and a backflow cavity by the piston assembly, and the power assembly is connected with the piston assembly; the pump body also comprises a water inlet, a water outlet and a water return port, the water inlet and the water outlet are both communicated with the water pumping cavity, and the water return port is communicated with the backflow cavity;

the water inlet is connected with the water storage tank through a water inlet pipe, and the water return port is connected with the water storage tank through a water return pipe.

With reference to the first aspect, in a possible implementation manner, the pump body assembly further includes a water inlet nozzle, a water outlet nozzle, and a water return nozzle, where the water inlet nozzle is disposed at the water inlet, the water outlet nozzle is disposed at the water outlet, and the water return nozzle is disposed at the water return port.

With reference to the first aspect, in one possible embodiment, a check valve structure is provided in each of the water inlet nozzle and the water outlet nozzle.

With reference to the first aspect, in a possible implementation manner, the water inlet nozzle is in rotation-stopping fit with the water inlet, a first rotation-stopping plane is arranged in the circumferential direction of the water inlet nozzle, a first rotation-stopping boss is arranged at the water inlet, and the first rotation-stopping boss is in surface fit with the first rotation-stopping plane.

In combination with the first aspect, in a possible implementation manner, the water return nozzle is in rotation-stop fit with the water return opening, a second rotation-stop plane is arranged in the circumferential direction of the water return nozzle, a second rotation-stop boss is arranged on the water return opening, and the second rotation-stop boss is in surface fit with the second rotation-stop plane.

With reference to the first aspect, in a possible implementation manner, a flow guide pipe is disposed in the water storage tank, one end of the flow guide pipe is connected to the water inlet pipe, and the other end of the flow guide pipe extends towards the bottom of the water storage tank and is provided with a balancing weight.

With reference to the first aspect, in a possible implementation manner, a water filling port is arranged on the water storage tank, a detachable plug is arranged on the water filling port, and the plug is in sealing fit with the water filling port.

With reference to the first aspect, in a possible embodiment, one end of the closure is hinged to the water storage tank.

In combination with the first aspect, in a possible implementation manner, the piston assembly includes a piston body, a piston rod and a water collection rubber sleeve, the piston body is slidably disposed in the pump body and located in the accommodating space, the piston body separates the accommodating space into the pump water cavity and the backflow cavity, the piston rod is connected to the piston body, one end of the water collection rubber sleeve is disposed on the piston rod, the other end of the water collection rubber sleeve is connected to the pump body, and the water collection rubber sleeve is located at an open end of the accommodating space.

In order to achieve the above object, in a second aspect, the present application further provides a tooth rinsing device, including a housing, a nozzle, a control main board, and the water supply device provided in the first aspect;

the water supply device is arranged on the shell;

the nozzle is arranged on the shell and is communicated with the water outlet;

the control mainboard is arranged in the shell.

Compared with the prior art, the beneficial effects of the application are that:

the application provides a water supply device and a tooth flushing device, wherein the water supply device comprises a water storage tank and a water pumping mechanism; the water pumping mechanism comprises a pump body assembly, a piston assembly and a power assembly, the pump body assembly comprises a pump body, an accommodating space is arranged in the pump body, the piston assembly is arranged in the pump body and located in the accommodating space, the accommodating space is divided into a water pumping cavity and a backflow cavity by the piston assembly, and the power assembly is connected with the piston assembly; the pump body also comprises a water inlet, a water outlet and a water return port, the water inlet and the water outlet are both communicated with the water pumping cavity, and the water return port is communicated with the backflow cavity; wherein, the water inlet is connected with the water storage tank through a water inlet pipe, and the water return port is connected with the water storage tank through a water return pipe. The application provides a water supply installation collects the water of the inside leakage of the pump body through the backward flow chamber, and the leading-in storage water tank reuse of the water rethread wet return that will collect simultaneously. The water supply device is applied to the tooth flushing device, so that the problems of short circuit of an internal circuit of the tooth flushing device and corrosion of hardware caused by water leaked from the pump body are effectively avoided, and the service life is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic perspective view illustrating a dental irrigator according to an embodiment of the present disclosure;

FIG. 2 is a schematic perspective view of the water irrigator shown in FIG. 1 with the housing and the water storage tank hidden;

FIG. 3 is a schematic view showing the assembly of the water pumping mechanism and the control main board of the water irrigator of FIG. 1 arranged on the mounting frame;

FIG. 4 is a schematic diagram showing the structure of a water pumping mechanism in the water toothpick shown in FIG. 1;

FIG. 5 shows an exploded schematic view of the water pumping mechanism shown in FIG. 4;

FIG. 6 is a sectional view showing a partial structure of the water pumping mechanism shown in FIG. 4;

fig. 7 shows a cross-sectional view of the pump body in the water pumping mechanism shown in fig. 6.

Description of the main element symbols:

100-a water supply device; 100 a-a water storage tank; 100 b-a water pumping mechanism; 110-a closure; 120-a pump body assembly; 121-pump body; 121 a-water outlet; 121 b-a water inlet; 121 c-a water return port; 121 d-an accommodating space; 122-water outlet nozzle; 1220-a second check valve arrangement; 123-water return nozzle; 124-water inlet nozzle; 1240-a first check valve arrangement; 130-a piston assembly; 131-a piston body; 1310-a ball cavity; 1311 a-pump water chamber; 1311 b-reflux chamber; 132-a water-collecting rubber sleeve; 133-piston rod; 1330-a ball head; 1331-a limit boss; 140-a power assembly; 141-a motor; 142-a drive gear; 143-transmission gear; 150-a water return pipe; 151-a draft tube; 152-a counterweight block; 160-water inlet pipe; 200-a housing; 210-a slip resistant structure; 220-a mounting frame; 300-a nozzle; 310-a movable knob; 400-control the mainboard; 410-PCB control mainboard; 420-a power supply battery; 430-USB charging pad.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

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

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

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

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

Example one

Referring to fig. 1 to 7, the present embodiment provides a water supply device 100 applied to a tooth rinsing device, wherein the water supply device 100 is used for providing a pulse water flow with a certain pressure for the tooth rinsing device to rinse off foreign matters in teeth and tooth gaps.

Referring to fig. 2 and 4, the water supply device 100 of the present embodiment includes a water storage tank 100a and a water pumping mechanism 100b, wherein the water storage tank 100a is used for storing a rinsing liquid for rinsing teeth, the water pumping mechanism 100b is used for discharging the rinsing liquid in the water storage tank 100a from a nozzle 300 of a tooth rinsing device, and the pumped water flow has a certain pressure so as to achieve the effect of rinsing off foreign matters in teeth and crevices of teeth.

Referring to fig. 1 and 2, the water tank 100a has a receiving space therein for storing a tooth washing solution, wherein the tooth washing solution may be water, but other tooth washing liquids may be used.

Be equipped with the water filling port (not shown) on the storage water tank 100a, the flush fluid is injected into the inside accommodation space of storage water tank 100a by the water filling port, and is further, is provided with detachable blanking cap 110 on the water filling port, and blanking cap 110 and water filling port are sealed cooperation, avoid the inside flush fluid of storage water tank 100a to leak.

Further, a sealing member is disposed between the blocking cap 110 and the water inlet to prevent the leakage of the washing liquid.

In some embodiments, one end of the closure 110 is hinged to the storage tank 100a, that is, the closure 110 is rotatable about the hinge. During the use, stir the other end of blanking cap 110, open blanking cap 110, make the water filling port expose, the filling flush fluid, the flushing fluid fills the back full, close blanking cap 110 can, convenient to use can prevent effectively that blanking cap 110 from losing.

In other embodiments, the cap 110 may be connected to the tank 100a by a pull string, which may also prevent the cap 110 from being lost. Alternatively, the pull wire may be of a rubber material.

Referring to fig. 4, fig. 5, fig. 6 and fig. 7, the water pumping mechanism 100b includes a pump body assembly 120, a piston assembly 130 and a power assembly 140, wherein the power assembly 140 is configured to drive the piston assembly 130 to perform reciprocating piston motion in the pump body assembly 120, so that the interior of the pump body assembly 120 realizes the alternation of the negative pressure state and the positive pressure state.

It is understood that the pump body assembly 120 may pump the rinsing liquid from the interior of the water storage tank 100a when the pump body assembly 120 is in a negative pressure state, and the pump body assembly 120 may discharge the pumped rinsing liquid toward the nozzle 300 of the dental irrigator when the pump body assembly 120 is in a positive pressure state.

Referring to fig. 5, fig. 6 and fig. 7, the pump assembly 120 includes a pump body 121, a receiving space 121d is disposed inside the pump body 121, the piston assembly 130 is disposed inside the pump body 121, and the piston assembly 130 is located in the receiving space 121 d.

The piston assembly 130 divides the accommodating space 121d into a pump water cavity 1311a and a return cavity 1311b, the power assembly 140 is connected to the piston assembly 130, and the power assembly 140 is configured to drive the piston assembly 130 to perform reciprocating piston motion in the accommodating space 121d inside the pump body 121, so that the pump water cavity 1311a realizes mutual alternation of a negative pressure state and a positive pressure state.

Further, the pump body 121 further includes a water inlet 121b, a water outlet 121a and a water return port 121c, wherein the water inlet 121b is communicated with the pumping cavity 1311a, the water outlet 121a is also communicated with the pumping cavity 1311a, and the water return port 121c is communicated with the return cavity 1311 b.

The water inlet 121b is connected to the water storage tank 100a through a water inlet pipe 160, the water outlet 121a is connected to a nozzle 300 of the tooth rinsing device, and the water return port 121c is connected to the water storage tank 100a through a water return pipe 150.

That is, when the pumping chamber 1311a is in a negative pressure state, the washing liquid enters the pumping chamber 1311a along the water inlet pipe 160 through the water inlet port 121 b; when the pump water chamber 1311a is in a positive pressure state, the washing liquid can be discharged from the nozzle 300 through the water outlet 121 a.

If water leaks when the piston assembly 130 operates for a long time, namely, the flushing liquid in the pump cavity 1311a leaks to the return cavity 1311b, and then along with the movement of the piston assembly 130, the flushing liquid is guided into the water storage tank 100a through the return water inlet 121c and the return water pipe 150, so that the flushing liquid is recycled, the leaked flushing liquid is prevented from entering the tooth flushing device, and the service life of the tooth flushing device is prolonged.

In this embodiment, the pump body assembly 120 further includes a water inlet nozzle 124, a water outlet nozzle 122 and a water return nozzle 123, the water inlet nozzle 124 is disposed at the water inlet 121b, the water outlet nozzle 122 is disposed at the water outlet 121a, the water return nozzle 123 is disposed at the water return port 121c, the water inlet pipe 160 is mounted on the water inlet nozzle 124, and the water return pipe 150 is mounted on the water return nozzle 123.

Further, in order to prevent the back flow of the washing liquid introduced into the pump chamber 1311a from the water inlet port 121b, a check valve structure is provided in the water inlet nozzle 124; in order to prevent the rinse liquid discharged from the outlet port 121a from flowing backward, a check valve structure is also provided in the outlet nozzle 122.

In some embodiments, the check valve structure located within the water inlet nozzle 124 is a first check valve structure 1240, the first check valve structure 1240 being a wafer check valve that is a double-wafer. That is, the first check valve structure 1240 includes an outer ring and a check valve plate, wherein the check valve plate is disposed on the outer ring; when the first check valve arrangement 1240 is in the off state, the check valve flap moves towards the outlet of the water inlet nozzle 124 to block the outlet of the water inlet nozzle 124 to avoid flushing back flow; when the first check valve 1240 is in the on state, the check valve moves toward the water inlet 121b of the pump body 121, so that the outlet of the water inlet nozzle 124 is opened, and the flushing fluid smoothly enters the pump chamber 1311 a.

Optionally, the outer ring and the check valve plate are of an integrally formed structure and made of a cut rubber material.

In other embodiments, the check valve structure located within spout 122 is a second check valve structure 1220, and second check valve structure 1220 is an inverted cone structure. That is, the second check valve structure 1220 is made of soft material, and the opening along the water outlet direction gradually converges, when the second check valve structure 1220 is in the off state, the outlet of the second check valve structure 1220 is closed, and when the second check valve structure 1220 is in the on state, the outlet of the second check valve structure 1220 is opened.

In still other embodiments, the first and second check valve structures 1240, 1220 are both ball and bead type structures.

In order to prevent the water inlet nozzle 124 from rotating after being installed and causing loosening and water leakage, in this embodiment, the water inlet nozzle 124 is in rotation stop fit with the water inlet 121b, specifically, a first rotation stop plane is arranged in the circumferential direction of the water inlet nozzle 124, a first rotation stop boss is arranged at the water inlet 121b, and the first rotation stop boss is in surface fit with the first rotation stop plane.

In order to prevent the water return nozzle 123 from rotating after being installed to cause loose water leakage, in this embodiment, the water return nozzle 123 is in rotation-stop fit with the water return port 121c, specifically, a second rotation-stop plane is arranged in the circumferential direction of the water return nozzle 123, a second rotation-stop boss is arranged on the water return port 121c, and the second rotation-stop boss is in surface fit with the second rotation-stop plane.

Referring to fig. 2, a flow guide tube 151 is disposed in the water storage tank 100a, one end of the flow guide tube 151 is connected to the water inlet tube 160 through a joint, the other end of the flow guide tube 151 extends toward the bottom of the water storage tank 100a, and a weight 152 is disposed, the weight 152 is disposed to enable the flow guide tube 151 to contact the bottom of the water storage tank 100a, so as to ensure that the washing liquid in the water storage tank 100a can be drained.

Referring to fig. 5 and fig. 6, the piston assembly 130 includes a piston body 131, a piston rod 133 and a water collecting rubber sleeve 132, wherein the piston body 131 is slidably disposed in the pump body 121 and is located in the accommodating space 121 d. Specifically, the piston body 131 divides the accommodating space 121d into a pumping chamber 1311a and a return chamber 1311 b. In the present embodiment, along the axial direction of the piston body 131, the piston body 131 includes an upper section and a lower section, and the outer diameter of the upper section is matched with the accommodating space 121d to form a sealing contact.

Further, the outer diameter of the lower section is smaller than that of the upper section, so that an annular overflowing gap is reserved between the lower section and the inner wall of the pump body 121, the overflowing gap belongs to a part of the backflow cavity 1311b, the water return port 121c is communicated with the overflowing gap, and the overflowing gap can facilitate the flowing of flushing liquid leaked from the pump cavity 1311 a.

The piston connecting rod 133 is connected with the piston body 131, one end of the water collecting rubber sleeve 132 is arranged on the piston connecting rod 133, the other end of the water collecting rubber sleeve 132 is connected with the outer wall of the pump body 121, and the water collecting rubber sleeve 132 is located at the opening end of the accommodating space 121 d. That is, the water collecting rubber sleeve 132 and the overflowing gap together form the backflow cavity 1311 b.

Further, the piston rod 133 and the piston body 131 are in hinged fit, specifically, in this embodiment, the end of the piston rod is provided with the ball 1330, the piston body 131 is provided with the ball cavity 1310 for accommodating the ball 1330, when the ball 1330 of the piston rod 133 is arranged in the ball cavity 1310 of the piston body 131, the ball joint is formed, the piston rod 133 can rotate around the center of the ball cavity 1310, and then the situation that the piston rod 133 is jammed when driving the piston body 131 to move is avoided, so that the piston body 131 moves more smoothly in the pump body 121.

Referring to fig. 5 and 6, the water collecting rubber sleeve 132 is further in a horn shape, and the water collecting rubber sleeve 132 in the horn shape has a large opening end and an opposite small opening end, wherein the small opening end is sleeved on the piston rod 133, and the large opening end is sleeved on the outer wall of the pump body 121.

In order to prevent the water collecting rubber sleeve 132 from sliding in the axial direction of the piston connecting rod 133, an annular limit boss 1331 is provided on the piston connecting rod 133.

It will be appreciated that the water collecting rubber sleeve 132 has flexibility in the axial direction, and as the piston body 131 reciprocates, the water collecting rubber sleeve 132 axially compresses and expands, and discharges the flushing liquid in the backflow chamber 1311b into the water storage tank 100 a. Alternatively, the water-collecting boot 132 is a bellows boot, which is better in compression and relaxation in the axial direction.

The power assembly 140 includes a motor 141, a driving gear 142 and a transmission gear 143, the driving gear 142 is disposed on an output shaft of the motor 141, the driving gear 142 is engaged with the transmission gear 143, the motor 141 outputs a rotation motion, the transmission gear 143 is driven to rotate by the driving gear 142, one end of the piston connecting rod 133 away from the ball 1330 is eccentrically disposed on the transmission gear 143, and then the piston body 131 is driven to perform a reciprocating piston motion by the rotation of the transmission gear 143 and the piston connecting rod 133. Alternatively, the drive gear 142 is a spur gear and the drive gear 143 is a face gear.

The water supply apparatus 100 according to this embodiment collects the rinse liquid leaked from the inside of the pump body 121 through the return chamber 1311b, and introduces the collected rinse liquid into the storage tank 100a through the return pipe 150 for reuse. The water supply device 100 is applied to the tooth flushing device, so that the problems of short circuit of an internal circuit of the tooth flushing device and corrosion of hardware caused by water leaked from the pump body 121 are effectively avoided, and the service life is prolonged.

Example two

Referring to fig. 1, 2 and 3, the present embodiment provides a tooth rinsing device, which includes a housing 200, a nozzle 300, a control main board 400 and a water supply device 100 according to the first embodiment.

The water supply device 100 is disposed in the housing 200, specifically, the water storage tank 100a is disposed at the bottom of the housing 200, and the water pumping mechanism 100b is disposed inside the housing 200.

The nozzle 300 is arranged at the upper end of the shell 200, the nozzle 300 is communicated with the water outlet 121a of the pump body 121, specifically, the nozzle 300 is arranged on the shell 200 through the movable knob 310, and the orientation of the nozzle 300 can be adjusted by rotating the movable knob 310, so that teeth can be washed at different angles, and the cleaning effect is improved.

The control main board 400 is also disposed in the housing 200, the control main board 400 includes a PCB control main board 410, a USB charging board 430 and a power supply battery 420, the power supply battery 420 is charged through the USB charging board 430, and the power supply battery 420 provides electric energy for the PCB control main board 410 and the motor 141.

The housing 200 is further provided with a mounting rack 220, the water pumping mechanism 100b and the control main board 400 are both arranged on the mounting rack 220, and the mounting rack 220 enables the structure inside the tooth flushing device to be more compact.

The side wall of the casing 200 is provided with an indicator light and a switch button, the indicator light indicates the power state of the power supply battery 420 through different colors, and the switch is installed to control the motor 141 to be started and shut down.

The side wall of the housing 200 is further provided with an anti-slip structure 210, wherein the anti-slip structure 210 includes anti-slip lines or anti-slip bumps.

The water supply device 100 provided by the first embodiment is applied to the tooth rinsing device provided by the embodiment, so that the problems of short circuit of an internal circuit of the tooth rinsing device and corrosion of hardware caused by water leaked in the pump body 121 are effectively solved, and the service life is prolonged.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A water supply device is characterized by comprising a water storage tank and a water pumping mechanism;

the water pumping mechanism comprises a pump body assembly, a piston assembly and a power assembly, wherein the pump body assembly comprises a pump body, an accommodating space is arranged in the pump body, the piston assembly is arranged in the pump body and is positioned in the accommodating space, the accommodating space is divided into a water pumping cavity and a backflow cavity by the piston assembly, and the power assembly is connected with the piston assembly; the pump body also comprises a water inlet, a water outlet and a water return port, the water inlet and the water outlet are both communicated with the water pumping cavity, and the water return port is communicated with the backflow cavity;

the water inlet is connected with the water storage tank through a water inlet pipe, and the water return port is connected with the water storage tank through a water return pipe.

2. The water supply device according to claim 1, wherein the pump body assembly further comprises a water inlet nozzle, a water outlet nozzle and a water return nozzle, the water inlet nozzle is arranged at the water inlet, the water outlet nozzle is arranged at the water outlet, and the water return nozzle is arranged at the water return port.

3. The water supply of claim 2 wherein a check valve arrangement is provided in both the inlet nozzle and the outlet nozzle.

4. The water supply device as claimed in claim 2, wherein the water inlet nozzle is engaged with the water inlet in a rotation-stopping manner, a first rotation-stopping plane is arranged on the circumference of the water inlet nozzle, a first rotation-stopping boss is arranged on the water inlet, and the first rotation-stopping boss is engaged with the first rotation-stopping plane in a surface manner.

5. The water supply device as claimed in claim 2, wherein the water return nozzle is in rotation stop fit with the water return opening, a second rotation stop plane is arranged on the circumferential direction of the water return nozzle, a second rotation stop boss is arranged on the water return opening, and the second rotation stop boss is in surface fit with the second rotation stop plane.

6. The water supply device as claimed in claim 1, wherein a flow guide tube is disposed in the water storage tank, one end of the flow guide tube is connected to the water inlet tube, and the other end of the flow guide tube extends toward the bottom of the water storage tank and is provided with a weight block.

7. The water supply device according to claim 1, wherein a water filling port is arranged on the water storage tank, a detachable plug cap is arranged on the water filling port, and the plug cap and the water filling port are in sealing fit.

8. The water supply of claim 7 wherein one end of the closure is hinged to the tank.

9. The water supply device according to any one of claims 1 to 8, wherein the piston assembly comprises a piston body, a piston connecting rod and a water collecting rubber sleeve, the piston body is slidably arranged in the pump body and located in the accommodating space, the accommodating space is divided into the pump water cavity and the backflow cavity by the piston body, the piston connecting rod is connected with the piston body, one end of the water collecting rubber sleeve is arranged on the piston connecting rod, the other end of the water collecting rubber sleeve is connected with the pump body, and the water collecting rubber sleeve is located at an opening end of the accommodating space.

10. A water irrigator comprising a housing, a nozzle, a control board and a water supply device according to any one of claims 1 to 9;

the water supply device is arranged on the shell;

the nozzle is arranged on the shell and is communicated with the water outlet;

the control mainboard is arranged in the shell.

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