CN211713447U

CN211713447U - A put in device and washing machine for washing machine

Info

Publication number: CN211713447U
Application number: CN201922324936.0U
Authority: CN
Inventors: 陈小平; 徐锦锋; 张宝鸽; 姚庆辉; 刘军; 徐士军; 孟令馨; 朱甫金; 牟平
Original assignee: Foshan Viomi Electrical Technology Co Ltd
Current assignee: Foshan Viomi Electrical Technology Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-10-20
Anticipated expiration: 2029-12-20

Abstract

The utility model relates to a throwing device for a washing machine, which comprises a driving unit, a driven unit and a throwing unit, wherein the driving unit is used for transmitting driving force to the driven unit and driving the driven unit to move; the driven units are used for receiving the main power transmitted by the main driving unit; the plurality of throwing pumps are respectively connected with the corresponding driven units, receive the main power transmitted by the driven units and are used for throwing the washing liquid; the switching unit for the switching of the connection state of initiative unit and a plurality of driven units, thereby can realize automatic switch-over, corresponding the utility model discloses a put in the device part and simplify, do not need a plurality of initiative units of putting in the device, only need the putting in of a plurality of detergents of a initiative unit completion, the structure is retrencied, simultaneously the utility model discloses still relate to the washing machine who uses this input device.

Description

A put in device and washing machine for washing machine

Technical Field

The utility model relates to a put in technical field for washing machine, concretely relates to put in device and washing machine for washing machine.

Background

At present, a washing machine mostly adopts various detergents such as laundry detergent, softener or disinfectant, and an automatic feeding system is arranged for conveniently feeding the detergents.

An automatic throwing system of the existing washing machine is generally provided with a plurality of sets of pump liquid devices for pumping detergents in different storage boxes, and when the laundry detergent needs to be added, the laundry detergent in the laundry detergent storage boxes is thrown into a washing bucket through pump liquid systems corresponding to the laundry detergent, so that a plurality of sets of pump liquid systems are needed, and are respectively provided with respective pumping structures corresponding to a plurality of motors; on the other hand, in a system provided with a motor to control a plurality of pump structures, the forward and reverse rotation control is only suitable for two liquid pumping devices, and when three or more detergents need to be used, the fact that one motor controls a plurality of pumps to independently throw in the detergents cannot be really realized.

SUMMERY OF THE UTILITY MODEL

To the weak point of prior art, the utility model aims to provide a put in device and washing machine for washing machine.

The technical scheme of the utility model outlines as follows:

the utility model provides a put in device for washing machine, include:

the driving unit is used for transmitting driving force to the driven unit and driving the driven unit to move;

the driven units are the ith driven units, i is a positive integer, and the driven units are used for receiving the main power transmitted by the driving unit;

a plurality of throwing pumps, namely the ith throwing pump, wherein i is a positive integer, and the throwing pumps are respectively connected with the corresponding driven units, receive the main power transmitted by the driven units and are used for throwing the washing liquid;

and the switching unit is used for switching the connection state of the driving unit and the plurality of driven units, namely the connection between the driving unit and the ith driven unit can be switched to the connection between the driving unit and the jth driven unit through the switching unit, wherein i and j are positive integers.

Furthermore, the number of the driven units is three, namely a first driven unit, a second driven unit and a third driven unit;

the three throwing pumps are a first throwing pump, a second throwing pump and a third throwing pump which respectively correspond to the first driven unit, the second driven unit and the third driven unit;

the throwing switching unit is used for switching among three connection states, namely connection of the driving unit and the first driven unit, connection of the driving unit and the second driven unit and connection of the driving unit and the third driven unit.

Preferably, the driving unit comprises a driving shaft, a driving gear and a driving motor, the driving gear is fixedly connected with the driving shaft in the circumferential direction and is in sliding connection in the axial direction, and the driving motor drives the driving shaft and the driving gear to rotate;

the plurality of driven units respectively comprise a driven shaft and a driven gear, and the driven gear is fixedly connected with the driven shaft;

the driving gear is meshed with the driven gear and used for power transmission.

Further, the plurality of driven gears are fixed in different planes perpendicular to the driven shaft, so that the connection states are not affected by each other, and when the driving gear is meshed with the ith driven gear, the jth driven gear is not meshed with the driving gear.

Preferably, the switching unit is including promoting lead screw, push motor, connecting piece one end is the nut circle, overlaps in promoting the lead screw, makes the connecting piece along with promoting lead screw axial motion, the connecting piece other end is the clamp structure, and the centre gripping driving gear makes the driving gear along with connecting piece axial motion.

Preferably, the driving shaft is a spline shaft; the driven shaft is a spline shaft and is provided with a stop check ring for limiting the axial movement of the driven gear.

Further, the throwing device further comprises a transmission shell, the transmission shell is used for containing the driving shaft, the driving gear, the driven wheel, the driven gear, the pushing screw rod, the pushing motor and the connecting piece, the transmission shell is provided with a driven shaft hole, and the driven shaft penetrates out of the driven shaft hole and is connected with the throwing pump.

Preferably, the driving motor and the driving shaft are driven by a transmission gear assembly, and the pushing motor and the pushing screw rod are driven by a switching gear assembly.

Furthermore, the transmission gear assembly comprises a first transmission gear fixedly connected with the motor shaft, a third transmission gear fixedly connected with the driving shaft, and a second transmission gear connected with the first transmission gear and the third transmission gear, and is used for power transmission between the driving motor and the driving shaft;

the switching gear assembly comprises a first switching gear fixedly connected with a shaft of the pushing motor, a second switching gear fixedly connected with the pushing screw rod, the first switching gear is connected with the second switching gear, and the pushing motor transmits power with the pushing screw rod.

Preferably, the throwing pump is a plunger pump, the driven unit drives an eccentric wheel of the plunger pump to rotate, and the plunger reciprocates.

On the other hand, the utility model provides a washing machine, which comprises a washing machine body, wherein the washing machine body comprises a liquid storage box, a washing barrel and a throwing device for the washing machine according to the technical proposal; each of the plurality of throwing pumps of the throwing device comprises a liquid inlet and a liquid outlet; the liquid inlet is connected with each corresponding liquid storage box, and the liquid outlet is connected with the washing bucket.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a put in device and washing machine for washing machine, wherein through setting up the switching unit for switch between being connected with a plurality of driven units from the initiative unit, realize single initiative power accessible initiative unit and transmit to a plurality of driven units respectively alone, then control respectively and put in the pump action, realize multiple detergent and put in separately, need not set up a plurality of motors, just can put in multiple detergent automatically.

For example, when the softener is used, the driving unit is switched to be connected with the driven unit corresponding to the softener by the switching unit, so that the power is transmitted to the throwing pump corresponding to the softener, and the device for automatically throwing the softener is optimized.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic structural view of a dispensing device of the present invention;

fig. 2 is a schematic structural view of a front view angle of a dispensing device according to the present invention;

fig. 3 is a schematic structural view of a main viewing angle of a dispensing device according to the present invention;

fig. 4 is a schematic structural view of a front view angle of a dispensing device according to the present invention;

fig. 5a is a schematic structural view of a first connection position of a dispensing device according to the present invention;

fig. 5b is a schematic structural view of a left viewing angle of a second connection position of the dispensing device of the present invention;

fig. 5c is a schematic structural diagram of a third connecting position of the feeding device of the present invention at a downward viewing angle.

Description of reference numerals:

11-a first driven shaft; 12-a first driven gear; 21-a second driven shaft; 22-a second driven gear; 31-a third driven shaft; 32-a third driven gear; 14-a first stop collar; 15-a second stop collar;

61-driving shaft; 62-a drive gear; 65-active motor; 67-a third transmission gear; 68-a second transmission gear; 69-a first transfer gear;

51-pushing a screw rod; 52-a connector; 521-nut ring; 522-a clamp; 55-a pushing motor; 56-second switching gear; 57-a first switching gear;

100-a transmission housing;

16-a first dosing pump; 18-a first liquid inlet; 19-a first liquid outlet; 26-a second dosing pump; 28-a second liquid inlet; 29-a second outlet; 36-a third dosing pump; 38-a third inlet; 39-third outlet port.

Detailed Description

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a more detailed description of the present invention, which will enable those skilled in the art to make and use the present invention. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the following embodiments or technical features can be used to form a new embodiment without conflict. It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1, the present invention relates to a putting device for a washing machine, which comprises a driving unit 60 for transmitting a driving force to a driven unit to drive the driven unit to move; the driven units are the ith driven units, i is a positive integer, and the driven units are used for receiving the main power transmitted by the driving unit; a plurality of throwing pumps, namely the ith throwing pump, wherein i is a positive integer, and the throwing pumps are respectively connected with the corresponding driven units, receive the main power transmitted by the driven units and are used for throwing the washing liquid; and the switching unit 50 is used for realizing the switching of the connection states of the driving unit and the plurality of driven units, namely the connection between the driving unit and the ith driven unit can be switched to the connection between the driving unit and the jth driven unit through the switching unit, wherein i and j are positive integers.

In some embodiments, the number of slave units may be three, i.e., the first slave unit 10, the second slave unit 20, the third slave unit 30; the number of the throwing pumps is three, namely a first throwing pump 16, a second throwing pump 26 and a third throwing pump 36 which respectively correspond to the first driven unit 10, the second driven unit 20 and the third driven unit 30; the throwing switching unit can be switched among three states of the driving unit 60 being connected with the first slave unit 10, the driving unit 60 being connected with the second slave unit 20 and the driving unit 60 being connected with the third slave unit 30, and at this time, the switching unit 50 is switched by acting on the driving unit. Of course, the number of the driven units can be two, four or more, and the embodiment is that three driven units are arranged aiming at three laundry articles which are commonly used in the prior art; if the laundry is thrown for other numbers of articles, corresponding modification in number can be carried out according to the teaching of the embodiment of the utility model.

In some embodiments, as shown in fig. 2, 3 and 4, the driving unit 60 includes a driving shaft 61, a driving gear 62 and a driving motor 65, wherein the driving gear 62 is fixedly connected with the driving shaft 61 in a circumferential direction and is connected with the driving shaft 61 in an axially sliding manner; the driving gear 62 can axially move on the driving shaft 61, thereby providing possibility for realizing switching; in addition, the driving motor 65 drives the driving shaft 61 and the driving gear 62 to rotate, so that the driving power generated by the driving motor 65 can be transmitted to the driving gear 62 of the driving shaft 61 to generate a rotating force;

the plurality of driven units each include a driven shaft, a driven gear, for example, when there are three driven units, the first driven unit 10 includes a first driven shaft 11, a first driven gear 12, the second driven unit 20 includes a second driven shaft 21, a second driven gear 22, the third driven unit 30 includes a third driven shaft 31, a third driven gear 32; the driven gear is fixedly connected with the driven shaft.

The driving gear 62 is engaged with the driven gear to realize power transmission. For example, when the driving gear 62 is engaged with the first driven gear 12, the driving force generated by the driving motor 65 can be transmitted to the driving gear 62 of the driving shaft 61 to generate a rotating force, and the driving gear 62 is engaged with the first driven gear 12 to transmit the generated rotating force to the first driven gear 1, so that the first driven gear 12 rotates, and therefore, the first driven shaft 11 also rotates to achieve the purpose of transmitting the driving force.

Further, a plurality of driven gears are fixed in different planes perpendicular to the driven shaft, so that the connection states are not influenced by each other, when the driving gear is meshed with the ith driven gear, the jth driven gear is not meshed with the driving gear, for example, when the driving gear 62 is meshed with the first driven gear 12, the second driven gear 22 and the third driven gear 32 are not meshed with the driving gear, and thus, the mutual influence is achieved, and the driving gear 62 drives one driven gear to work at a time.

In some embodiments, as shown in fig. 5a,5b, and 5c, the switching unit 50 includes a push screw 51, a push motor 55, and a connecting member 52, wherein one end of the connecting member 52 is a nut ring 521, which is sleeved on the push screw 51 to allow the connecting member 52 to move axially along with the push screw 51, and the other end of the connecting member 52 is a clip structure 522 which clamps the driving gear 62 to allow the driving gear 62 to move axially along with the connecting member 52; the pushing motor 55 drives the pushing screw 51 to rotate, so that the connecting piece 52 moves axially, the driving gear 62 moves axially, and switching is realized.

For example, fig. 5a shows a first connection position, in which the driving gear 62 is engaged with the first driven gear 12, and the driving force generated by the driving motor 65 is transmitted to the first driven shaft 11.

When the second driven shaft 21 needs to rotate, the pushing screw rod 51 is driven to rotate by the pushing motor 55, and the connecting piece 52 sleeved on the pushing screw rod 51 through the nut ring 521 moves in the axial direction along with the rotation of the pushing screw rod 51; because the other end of the connector 52 is in the form of a clip 522 that retains the drive gear 62, axial movement of the drive gear 62 is achieved as the connector moves axially. For example, when the connecting member 52 is moved to the position shown in fig. 5b, and the driving gear 62 is moved to engage with the second driven gear 22, the driving force generated by the driving motor 65 can be transmitted to the second driven shaft 21 to rotate the second driven shaft 21.

Further, when rotation of the third driven shaft 31 is required, similarly, the driving motor 65 rotates the third driven shaft 31 by pushing the motor 55 to move the connecting member 52 and the driving gear 62 to the position shown in fig. 5c, so as to engage with the third driven gear 32.

Of course, as shown in the figure, in the front view interface, the first driven unit is located on the left side of the driving unit, the second driven unit is located on the upper side of the driving unit, the third driven unit is located on the right side of the driving unit, and the switching unit is located on the lower side of the driving unit, so that the driving unit and the switching unit are regularly arranged, and the switching of working states is facilitated. When the driven unit is a plurality of, can set up other driven units on corresponding position to realize the transmission through some transmission connected modes, for example still have the fourth driven unit, the setting is in the top of first driven shaft 11 shown in the figure, the left of second driven shaft 21, fourth driven unit structure can be the same with first transmission unit this moment, the difference lies in that the fourth is followed the setting of driving wheel and is followed the plane different from the first three driven wheels, when having the distance with action wheel 62, the accessible adds the intermediate transfer spare, it rotates to realize action wheel 62 drives the fourth driven wheel.

In some embodiments, the drive shaft 61 is a splined shaft that transmits power to the drive wheel 62 through the splines; the driven shaft is a spline shaft, the driven shaft is provided with a stop collar for limiting the axial movement of the driven gear, as shown in fig. 5a, the first driven shaft 11 is provided with a first stop collar 14 and a second stop collar 15 for fixing the first driven gear 12 and preventing the first driven gear 12 from moving axially; correspondingly, the other driven shafts are also provided with stop check rings.

In some embodiments, the dispensing device further includes a transmission housing 100 for accommodating the driving shaft 61, the driving gear 62, the driven gear, the pushing screw 51, the pushing motor 55, and the connecting member 52 to protect the transmission portion of the entire dispensing device, and the transmission housing 100 is provided with a driven shaft hole, from which the driven shaft extends to connect to a corresponding dispensing pump.

In some embodiments, the drive motor 65 is driven by the drive shaft 61 through a transmission gear assembly, and the push motor 55 is driven by the push screw 51 through a switching gear assembly.

In some embodiments, the transmission gear assembly includes a first transmission gear 69 fixedly connected to the motor shaft, a third transmission gear 67 fixedly connected to the driving shaft, and a second transmission gear 68 connecting the first transmission gear 69 and the third transmission gear 67, so as to realize power transmission between the driving motor 65 and the driving shaft 61;

the switching gear assembly comprises a first switching gear 57 fixedly connected with the shaft of the pushing motor, a second switching gear 56 fixedly connected with the pushing screw rod 51, and the first switching gear 57 is connected with the second switching gear 56 to realize power transmission of the pushing motor 55 and the pushing screw rod 51. In this way, by gearing the respective power, the arrangement of the structure is facilitated, and the respective second switching gear 56 can be axially fixed to the housing as shown in the drawing, or fixed in another way.

Besides the gear transmission for power transmission and the screw transmission for switching, the driving unit, the driven unit and the switching unit can also be connected with the driving shaft 61 and the pushing screw 51 directly by other transmission methods, such as belt transmission and chain transmission, or by a motor shaft. The mode adopted by the embodiment is a general mechanical transmission mode, and details are not repeated.

Certainly, in another embodiment, the power source of the driving unit and the power source of the switching unit may be the same motor, and two power outputs are realized in a forward and reverse rotation mode of the motor, at this time, the driving shaft 61 and the transmission gear of the motor may be set to be in ratchet connection, and the pushing screw 51 and the transmission gear of the motor may be in ratchet connection. For example, when the motor rotates forward, the screw rod 51 is pushed to move, the driving shaft 61 is not moved, and switching is performed; when the motor reversal, promotion lead screw 51 is motionless, and driving shaft 61 activity carries out the main power output, so the utility model discloses the initiative motor that indicates can be same motor with the switching motor, reduces motor quantity like this more.

The utility model discloses a put in auto-change over device, set up the initiative unit to transmit power to the driven unit, set up the switching unit, be used for switching the cooperation, the transmission of initiative unit and driven unit, realized the control of a plurality of driven units, be favorable to the retrenching of structure; the transmission is quick, simple and accurate by adopting gears and lead screw transmission, and the control of a plurality of driven units can be realized without arranging a plurality of motors.

In some embodiments, the dispensing pump is a plunger pump, for example, when a gear and screw transmission mode is adopted, the rotation of the driven shaft drives an eccentric wheel of the plunger pump to rotate, so as to drive a plunger of the plunger pump to reciprocate, thereby realizing the dispensing function of the dispensing pump, although the dispensing pump can also adopt a piston pump, a gear pump, a screw pump, a vane pump, and the like.

On the other hand, the utility model provides a washing machine, which comprises a washing machine body, wherein the washing machine body comprises the throwing device for the washing machine, a necessary liquid storage box and a washing barrel; each of a plurality of throwing pumps of the throwing device comprises a liquid inlet and a liquid outlet; the liquid inlet is connected with each corresponding liquid storage box, and the liquid outlet is connected with the washing bucket, so that the washing liquid in the liquid storage boxes enters the washing bucket to participate in washing under the action of the throwing pump.

For example, the first driven shaft is connected with a first throwing pump 16, a first liquid inlet 18 of the first throwing pump is connected with a first liquid storage box, and the first liquid storage box stores laundry detergent; the second driven shaft is connected with a second feeding pump, a second liquid inlet 28 of the second feeding pump is connected with a second liquid storage box, and the second liquid storage box stores a softener; the third driven shaft is connected with a third feeding pump, a third liquid inlet 38 of the third feeding pump is connected with a third liquid storage box, and the third liquid storage box stores disinfectant; the first liquid outlet 19, the second liquid outlet 29 and the third liquid outlet 39 are communicated with the washing tub.

When clothes are required to be disinfected, the pushing motor 55 is operated to drive the pushing screw rod 51 to rotate, the connecting piece 52 moves axially to drive the driving gear 62 to move to a position meshed with the third driven gear 32, then the driving motor 65 is operated to drive the driving gear 62 to rotate to drive the third driven shaft 31 to rotate, so that the third throwing pump 36 moves to pump the disinfectant in the third liquid storage box into the washing tub;

when clothes need to be washed, at this time, the pushing motor 55 is operated to drive the pushing screw rod 51 to rotate, the connecting piece 52 moves axially to drive the driving gear 62 to move to a position meshed with the first driven gear 12, then the driving motor 65 is operated to drive the driving gear 62 to rotate to drive the first driven shaft 11 to rotate, so that the first throwing pump 16 moves to pump the laundry detergent in the first liquid storage box into the washing tub;

of course, a plurality of liquid storage boxes, feeding pumps and driven units which need to be fed can be arranged, so that a plurality of detergents can be fed independently.

When the motor or the quantitative design of the throwing is combined, the throwing amount can be controlled; in the control of the washing program, when different detergents need to be put in each step, the switching is simple and the putting is accurate.

Through the utility model discloses a washing machine can realize the independent input of multiple detergent, does not need every detergent to set up input pump and motor, only needs to switch it, reaches the purpose of a plurality of input pumps of single initiative motor control, and simple structure has the optimal action to the detergent input of laundry process moreover.

While the embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields where the invention is suitable, and further modifications may readily be made by those skilled in the art, and the invention is therefore not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.

Claims

1. A dispensing device for a washing machine, comprising:

2. A dosing device for a washing machine as claimed in claim 1, characterized in that:

the number of the driven units is three, namely a first driven unit, a second driven unit and a third driven unit;

3. A dosing device for a washing machine as claimed in claim 2, characterized in that:

the driving unit comprises a driving shaft, a driving gear and a driving motor, the driving gear is fixedly connected with the driving shaft in the circumferential direction and is in sliding connection in the axial direction, and the driving motor drives the driving shaft and the driving gear to rotate;

4. A dosing device for a washing machine as claimed in claim 3, characterized in that:

the plurality of driven gears are fixed in different relative planes perpendicular to the driven shaft, so that the connection states are not influenced mutually, and when the driving gear is meshed with the ith driven gear, the jth driven gear is not meshed with the driving gear.

5. A dosing device for a washing machine as claimed in claim 3, characterized in that:

the switching unit comprises a push screw rod, a push motor and a connecting piece, wherein one end of the connecting piece is a nut ring and sleeved on the push screw rod, so that the connecting piece moves along with the push screw rod in the axial direction, and the other end of the connecting piece is of a hoop structure and clamps the driving gear, so that the driving gear moves along with the connecting piece in the axial direction.

6. A dosing device for a washing machine as claimed in claim 3, characterized in that:

the driving shaft is a spline shaft; the driven shaft is a spline shaft and is provided with a stop check ring for limiting the axial movement of the driven gear.

7. A dosing device for a washing machine as claimed in claim 5, characterized in that: still include the transmission casing for hold driving shaft, driving gear, follow driving wheel, driven gear, promotion lead screw, push motor, connecting piece, the transmission casing sets up driven shaft hole, and the driven shaft is worn out driven shaft hole connects put in the pump.

8. A dosing device for a washing machine as claimed in claim 5, characterized in that: the driving motor and the driving shaft are driven through a transmission gear assembly, and the pushing motor and the pushing screw rod are driven through a switching gear assembly.

9. A dosing device for a washing machine as claimed in claim 8, characterized in that: the transmission gear assembly comprises a first transmission gear fixedly connected with a motor shaft, a third transmission gear fixedly connected with the driving shaft, and a second transmission gear connected with the first transmission gear and the third transmission gear, and is used for power transmission between the driving motor and the driving shaft;

10. A dosing device for a washing machine as claimed in any one of claims 1 to 9, characterized in that the dosing pump is a plunger pump, the driven unit rotating a plunger pump eccentric, the plunger reciprocating.

11. A washing machine comprising a washing machine body, characterized in that the washing machine body comprises a reservoir, a washing tub and a dosing device for a washing machine according to claim 10; each of the plurality of throwing pumps of the throwing device comprises a liquid inlet and a liquid outlet; the liquid inlet is connected with each corresponding liquid storage box, and the liquid outlet is connected with the washing bucket.