CN110495828B

CN110495828B - Water distribution device of dish washing machine, dish washing machine and control method of dish washing machine

Info

Publication number: CN110495828B
Application number: CN201810474372.6A
Authority: CN
Inventors: 宋华诚; 杨林; 陈玉玲; 何云峰; 宋夫财
Original assignee: Qingdao Haier Dishwasher Co Ltd
Current assignee: Qingdao Haier Dishwasher Co Ltd
Priority date: 2018-05-17
Filing date: 2018-05-17
Publication date: 2022-10-04
Anticipated expiration: 2038-05-17
Also published as: CN110495828A

Abstract

The invention belongs to the field of dish washing machines and discloses a dish washing machine water distribution device, a dish washing machine and a control method thereof. According to the invention, the positioning is realized by using the positioning detection device without calculating the conduction time of the motor through the rotation angle, so that the precision of alignment of the through hole and each spraying outlet can be greatly improved, the phenomenon that the water flow is reduced because the through hole is deviated from the spraying outlet due to the error of the rotation angle of the motor is avoided, and the spraying effect is improved.

Description

Dish-washing machine water distribution device, dish-washing machine and control method thereof

Technical Field

The invention belongs to the field of dish washing machines, and particularly relates to a dish washing machine water distribution device, a dish washing machine and a control method of the dish washing machine.

Background

When the existing dish washer washes the tableware, water is generally injected into an inner container of the dish washer, and then the water is pumped into a spray pipe in the dish washer through a circulating water pump to clean the tableware. In order to improve the washing effect of greasy tableware, a dishwasher usually uses an electric heater or a heat pump system to heat washing water, and then sprays the washing water to the tableware.

An upper spray arm and a lower spray arm are generally arranged in the current dishwasher liner; when the dishwasher is in operation, the washing pump conveys water with higher pressure to the upper and lower spray arms, the water is sprayed out from the spray arms to wash tableware and then returns to a cup at the bottom of the dishwasher, and the washing pump conveys the backflow water to the upper and lower spray arms again to complete a cycle. In order to achieve a better washing effect, three sprayers, namely bottom spraying, middle spraying and top spraying, are arranged in some dish washing machines, the bottom spraying is positioned at the bottom of an inner container of the dish washing machine, the middle spraying is positioned at the bottom of an upper shelf of the dish washing machine, and the upper spraying is positioned at the top of the inner container of the dish washing machine. The three sprayers act the water pumped by the washing pump on the tableware to wash the tableware.

Because of the large number of pipelines leading to each sprayer, large water and electric energy are consumed when the sprayer is opened at the same time. Generally, in order to save energy, each sprayer usually does not work at the same time, in this case, a shunt valve is needed to shunt water pumped by a washing pump to drive the corresponding sprayer to work, and the shunt valve can generally control one or two of the sprayers to work in a matched manner.

The existing shunt valve is generally provided with a shunt shifting piece with a through hole, the shunt shifting piece is rotated by an electric shunt motor, and when the through hole is aligned with a spray hole, a corresponding spray water path is conducted. In the prior art, the conduction time of the motor is calculated according to the rotation angle requirement and the motor rotation speed, so that errors are easy to occur, the precision is low, and the spraying effect is influenced.

In addition, as energy conservation and consumption reduction of household appliances are more and more emphasized, waste of heat energy in each washing stage in the dish washing machine is concerned. Some dish washers directly discharge hot water in the washing process, and cannot recycle heat energy in the washing process, so that waste of the heat energy is caused; if set up the heat exchange system of dish washer alone, then need additionally to increase pipeline and control valve, can increase the space that occupies, make the structure in the dish washer more complicated, be unfavorable for production and assembly.

The present invention has been made in view of this situation.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a water distribution device of a dish-washing machine, the dish-washing machine and a control method thereof. According to the invention, the positioning is realized by using the positioning detection device without calculating the conduction time of the motor through the rotation angle, so that the precision of alignment of the through hole and each spraying outlet can be greatly improved, the phenomenon that the water flow is reduced because the through hole is deviated from the spraying outlet due to the error of the rotation angle of the motor is avoided, and the spraying effect is improved.

In order to solve the technical problems, the invention adopts the technical scheme that:

the invention aims to provide a water distribution device of a dish washing machine, which comprises a first shell and a second shell which are connected, wherein a water distribution cavity is formed between the first shell and the second shell, a rotatable water distribution shifting piece is arranged in the water distribution cavity, a spraying outlet is arranged on the second shell, a through hole is arranged on the water distribution shifting piece, the water distribution shifting piece rotates to conduct or block the spraying outlet, the through hole is matched with the outer contour of a single spraying outlet, and positioning detection devices for positioning and conducting the through hole and each spraying outlet are arranged on the water distribution shifting piece and the second shell.

According to the technical scheme, the spray outlets at least comprise two spray outlets, the positioning detection device comprises positioning detection pieces arranged on the second shell and sensing pieces arranged on the water distribution shifting piece, the positioning detection pieces correspond to the spray outlets, the sensing pieces rotate along with the water distribution shifting piece, and when the sensing pieces interact with different positioning detection pieces and are attached to the water distribution shifting piece, the through holes are positioned and conducted with the corresponding spray outlets.

In a further scheme, the spraying outlets comprise a first spraying outlet, a second spraying outlet and a third spraying outlet which are arranged on the second shell, and the spraying outlets are arranged on the same circumference by taking the axis of the second shell as the center; each positioning detection piece is arranged on a connecting line of the center of the corresponding spraying outlet and the center of the circumference where the spraying outlet is arranged, and the position of the induction piece corresponds to the position of the positioning detection piece.

In a further scheme, the first spraying outlet, the second spraying outlet and the third spraying outlet have the same outline, and the through holes are matched with the outline of each spraying outlet; the distance from the positioning detection piece to the center of the circumference where the plurality of spraying outlets are located is greater than the distance from the spraying outlets to the center of the circumference; the distance from the sensing piece to the center of the water diversion shifting piece is the same as the distance from the positioning detection piece to the center of the circumference where the plurality of spraying outlets are located.

In a further scheme, the positioning detection piece and the corresponding spraying outlet are positioned on two sides of the center of the second shell, and the induction piece and the through hole are positioned on two sides of the center of the water diversion poking piece;

preferably, the positioning detection piece is an electromagnetic element, the induction piece is a permanent magnet, the permanent magnet rotates along with the water diversion shifting piece, and when the electromagnetic element corresponding to one spraying outlet is electrified, the permanent magnet and the electromagnetic element interact and are attached to each other, the through hole and the corresponding spraying outlet are positioned and conducted.

In a further scheme, the first spraying outlets, the second spraying outlets and the third spraying outlets are arranged at certain intervals, and the area between at least two adjacent spraying outlets is a plugging area for plugging the through holes; when the through hole rotates to the plugging area, each spraying outlet is plugged; the plugging area is correspondingly provided with a positioning detection piece;

preferably, the positioning detection piece arranged corresponding to the plugging area is positioned on a connecting line of the center of the plugging area and the center of the circumference where each spraying outlet is positioned;

preferably, the positioning detection piece corresponding to the plugging area and the positioning detection piece corresponding to the spraying outlet are positioned on the same circumference.

In a further scheme, the first spraying outlets, the second spraying outlets and the third spraying outlets are uniformly distributed on the same circumference at intervals; the areas between two adjacent spraying outlets are the same and are plugging areas; the plurality of positioning detection pieces are positioned on the same circumference of the peripheries of the spraying outlets and the blocking areas, and the spraying outlets or the blocking areas corresponding to the positioning detection pieces are oppositely arranged by taking the axis of the second shell as the center.

In a further scheme, the first spraying outlet, the second spraying outlet and the third spraying outlet are positioned on the same circumference, the first spraying outlet and the third spraying outlet are oppositely arranged, and the second spraying outlet is arranged at the central position between the first spraying outlet and the third spraying outlet; the position opposite to the second spraying outlet is a plugging area; the plurality of positioning detection pieces are positioned on the same circumference of the peripheries of the spraying outlets and the blocking areas, and the spraying outlets or the blocking areas corresponding to the positioning detection pieces are oppositely arranged by taking the axis of the second shell as the center.

The invention also provides a dish washing machine with the water distribution device of the dish washing machine, which comprises a main control device and a plurality of spraying devices, wherein a plurality of spraying outlets of the water distribution device are respectively communicated with the plurality of spraying devices, and the positioning detection device is electrically connected with the main control device.

A third object of the present invention is to provide a control method of a dishwasher as described above, comprising: when the dish-washing machine performs spray washing, the main control device controls the water distribution shifting piece to rotate, and the positioning detection device controls the through hole to be positioned and communicated with the corresponding spray outlet for spraying;

preferably, the main control device controls the water diversion shifting sheet to rotate, and starts the positioning detection piece corresponding to the corresponding spraying outlet, the sensing piece of the water diversion shifting sheet rotates towards the corresponding positioning detection piece, when the water diversion shifting sheet and the positioning detection piece are jointed, the through hole is aligned and communicated with the corresponding spraying outlet, and the water diversion shifting sheet stops rotating;

or the main control device controls the water distribution shifting piece to rotate, the positioning detection piece corresponding to the blocking area is opened, the sensing piece of the water distribution shifting piece rotates towards the corresponding positioning detection piece, when the water distribution shifting piece and the positioning detection piece are attached, the through hole is aligned with the blocking area, and all the spraying outlets are blocked.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. for smaller angles, because the power-on time of the motor is short, the precision is difficult to control, the positioning is realized by using the positioning detection device instead of calculating the conduction time of the motor through the rotation angle, the precision of the alignment of the through hole and the spray outlet can be greatly improved, the phenomenon that the water flow is reduced because the through hole is deviated from the spray outlet due to the error of the rotation angle of the motor is avoided, and the spray effect is improved.

2. The positioning detection device comprises a positioning detection piece arranged on the second shell and an induction piece arranged on the water distribution shifting piece, so that accurate positioning of the through hole and the spraying outlet can be realized through the interaction force of the positioning detection piece and the induction piece, signals can be transmitted to a main control device of the dish washing machine, the main control device controls the motor to act, the water quantity and the pressure of the spraying outlet are ensured, and the spraying effect is ensured.

3. The water diversion device is also provided with other water outlets besides the spraying outlet, and the water outlets can be connected with the heat exchange device or the recovery energy storage device, so that different spraying water paths can be conducted without adding other structures, heat exchange or heat recovery can be realized, the heat energy of the dish washing machine can be saved, the heat energy utilization rate can be improved, the internal structure of the dish washing machine can be simplified, and the occupied space can be reduced.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is an exploded view of a water diversion apparatus of the present invention;

FIG. 2 is a schematic view of an exploded structure of another water diversion apparatus of the present invention;

FIG. 3 is a schematic perspective view of the water diversion apparatus of the present invention;

FIG. 4 is a front view of the water diversion apparatus of the present invention;

FIG. 5 isbase:Sub>A schematic sectional view taken along line A-A of FIG. 4;

FIG. 6 is a schematic view of the top view structure of the water diversion device for plugging the spraying outlet of the present invention;

FIG. 7 is a schematic top view of the water diversion apparatus of the present invention with a single spray outlet open;

FIG. 8 is a schematic structural view of a water diversion paddle of the present invention;

FIG. 9 is a schematic view of a top view of the water distribution device of the present invention with two adjacent spray outlets open;

FIG. 10 is a schematic top view of the water diversion apparatus of the present invention with a single spray outlet open;

fig. 11 is a schematic structural view of another water diversion paddle of the present invention.

In the figure: 1 shell, 3 water inlets, 5 water outlets, 6 spray outlets, 7 first chambers, 8 second chambers, 9 first shells, 91 installation planes, 92 clamping grooves, 10 second shells, 101 disc-shaped planes, 102 annular circumferential surfaces and 103 clamping blocks, the device comprises an 11 water diversion stirring sheet, 12 through holes, 13 first spray outlets, 14 second spray outlets, 15 third spray outlets, 16 blocking areas, 17 driving devices, 18 transmission shafts, 19 positioning detection pieces and 20 induction pieces.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

Example one

As shown in fig. 1 to 11, the present embodiment provides a water diversion device for a dishwasher, including a first housing 91 and a second housing 101, a water diversion chamber is formed between the first housing 91 and the second housing 101, a rotatable water diversion paddle 11 is provided in the water diversion chamber, a spray outlet 6 is provided on the second housing 101, a through hole 12 matched with the spray outlet 6 is provided on the water diversion paddle 11, the water diversion paddle 11 rotates to conduct or block the spray outlet 6, and positioning detection devices for positioning and conducting the through hole 12 and the spray outlet 6 are provided on the water diversion paddle 11 and the second housing 101.

The water diversion device of this embodiment can set up in the bottom of dish washer, sets up water inlet 3 on water diversion device's the first casing 91, and the washing pump of dish washer bottom is with water pump to water inlet 3, then water enters into the inside spray set of dish washer from the export of spraying 6 that switches on, sprays to the tableware and washes.

The specific structure of the first shell 91 and the second shell 101 includes various structures, and may include, but is not limited to, the following specific schemes:

the first housing 91 is a hollow cylinder, one end of the first housing 91 is open, the edge of the opening extends to the outer periphery for a certain distance to form a disc-shaped mounting plane 91, and a part of the edge of the mounting plane 91 extends for a certain distance along the direction of the central axis and then extends for a certain distance along the circumferential direction of the first housing 91 to form a clamping groove 92. The second housing 101 includes a disc-shaped plane 101 and an annular peripheral surface 102 provided on the outer periphery of the disc-shaped plane 101, the annular peripheral surface 102 matching the mounting plane 91 of the first housing 91. The annular peripheral surface 102 is provided with a latch 103 engaged with the latch groove 92. After the entire open surface of the second housing 101 is engaged with the mounting surface 91 of the first housing 91, the latch 103 is inserted into the latch groove 92 and positioned and connected. A seal ring is provided between the first casing 91 and the second casing 101 to seal. In this way, the second housing 101 and the mounting plane 91 of the first housing 91 together enclose the water dividing chamber.

The water diversion poking piece 11 is of a disc-shaped structure, the diameter of the water diversion poking piece 11 is smaller than that of the plane of the second shell 101, the space on one side of the water diversion poking piece 11 is communicated with the water inlet 3 arranged on the first shell 91, and the other side of the water diversion poking piece 11 can shield the spraying outlet 6 on the plane of the second shell 101.

In this embodiment, be provided with on water diversion plectrum 11 and the second casing 101 and be used for the location detection device who switches on through-hole 12 and 6 location of shower outlet, the on-time that need not calculate the motor through rotation angle and speed realizes the location, but utilize location detection device to realize accurate location, accurate positioning hole 12 and the position of shower outlet 6 simultaneously, can improve the precision that through-hole 12 and shower outlet 6 align greatly, avoid reducing because of the water yield that motor rotation angle mistake caused, the phenomenon that water pressure is not enough, thereby improve and spray the effect, also can simplify the procedure.

In a further scheme, the positioning detection device comprises a positioning detection piece 19 arranged on the second shell 101 and a sensing piece 20 arranged on the water diversion poking piece 11, the position of the positioning detection piece 19 is arranged corresponding to the position of the spraying outlet 6, and the position of the sensing piece 20 is arranged corresponding to the position of the through hole 12; the positioning detection piece 19 and the induction piece 20 are correspondingly arranged, and when the two pieces are mutually acted and attached, the through hole 12 is positioned and communicated with the corresponding spraying outlet 6.

The positioning detection device comprises a positioning detection piece 19 arranged on the second shell 101 and a sensing piece 20 arranged on the water distribution shifting piece 11, wherein the positioning detection piece 19 and the sensing piece 20 are correspondingly arranged, and when the water distribution shifting piece 11 rotates to be close to each other, the positioning detection piece 19 and the sensing piece 20 can interact with each other and are finally attached together up and down. Meanwhile, the positioning detection piece 19 and the induction piece 20 respectively correspond to the spraying outlet 6 and the through hole 12, and when the positioning detection piece 19 and the induction piece 20 are attached, correspondingly, the spraying outlet 6 and the through hole 12 can be accurately aligned, so that the spraying outlet 6 is communicated.

In a further scheme, the spraying outlets 6 comprise a plurality of spraying outlets 6, and the plurality of spraying outlets 6 are arranged on the same circumference by taking the axis of the second shell 101 as the center; each spraying outlet 6 is at least correspondingly provided with one positioning detection piece 19, at least one through hole 12 is arranged, and at least one induction piece 20 is correspondingly arranged; when the sensing piece 20 rotates along with the water distribution shifting piece 11 and is positioned and attached with different positioning detection pieces 19, the corresponding spraying outlet 6 is conducted.

The water diversion device in the embodiment is provided with more than two spraying outlets 6, and the on and off of the spraying outlets 6 can be adjusted according to the requirements of the dish-washing machine, so that different washing modes are realized. For example, with two spray outlets 6, a middle spray and a lower spray can be supplied, respectively; three spray outlets 6 are provided for upper, middle and lower sprays, respectively.

Second casing 101 and the setting of dividing water plectrum 11 coaxial, and a plurality of shower outlets 6 set up on same circumference, are favorable to dividing water plectrum 11 rotatory back through-hole 12 can accurately align with each shower outlet 6.

In order to realize accurate positioning and alignment conduction of the through holes 12 on the different spray outlets 6 and the water diversion shifting piece 11, each spray outlet 6 is provided with at least one positioning detection piece 19, and the number of the positioning detection pieces can be multiple, so that the positioning accuracy is further improved. When each spraying outlet 6 is correspondingly provided with a plurality of positioning detection pieces 19, correspondingly, a plurality of sensing pieces 20 matched with each other can be correspondingly arranged on the water diversion poking piece 11.

One through hole 12 can be arranged on the water diversion poking sheet 11, and two or more through holes can be arranged according to the arrangement and the shape of the spray outlet 6. The sensing piece 20 on the water diversion poking sheet 11 is arranged corresponding to the position of the through hole 12. After the water diversion plectrum 11 rotates slowly, the sensing part 20 rotates, and when the sensing part 20 is close to and interacts with different positioning detection parts 19, and finally the positioning is attached, the corresponding conduction of the spraying outlet 6 can be accurately realized.

The corresponding setting mode of the positioning detection piece 19 and the spray outlet 6, the corresponding setting mode of the through hole 12 and the induction piece 20 can comprise various types, and when the positioning detection piece 19 and the induction piece 20 are interacted and attached, the through hole 12 and the corresponding spray outlet 6 can be accurately positioned and aligned, and the corresponding spray outlet 6 can be conducted. Specific protocols may include, but are not limited to, the following:

in the scheme 1, the positioning detection piece 19 is arranged on a connecting line between the center of the corresponding spray outlet 6 and the center of the circumference where the spray outlet 6 is located, the sensing piece 20 is arranged on a connecting line between the center of the through hole 12 and the center of the water diversion shifting piece 11, and the position of the sensing piece 20 corresponds to the position of the positioning detection piece 19.

The plurality of spraying outlets 6 are arranged on the same circumference by taking the axis of the second shell 101 as the center, when the positioning detection piece 19 is arranged on the connecting line of the center of the corresponding spraying outlet 6 and the center of the circumference where the spraying outlet 6 is located, the maximum acting force of the interaction between the positioning detection piece 19 and the induction piece 20 is also located on the connecting line of the center, and meanwhile, the induction piece 20 is also located on the connecting line of the center of the through hole 12 and the center of the water distribution shifting piece 11, so that the center of the through hole 12 of the water distribution shifting piece 11 and the center of the spraying outlet 6 can be accurately aligned, thereby avoiding positioning deviation and ensuring that the corresponding spraying outlet 6 can be accurately and completely communicated.

In the embodiment 2, the positioning detection member 19 and the spraying outlet 6 may be disposed on the same side of the center of the circumference, or may be disposed on both sides of the center of the circumference, and both are symmetrically disposed. The positioning detection member 19 may be disposed on the outer periphery of the shower outlet 6, or may be disposed on the inner periphery of the shower outlet 6, and may be disposed according to actual needs.

Preferably, a plurality of positioning detection pieces 19 are positioned on the same circumference, and the distance from the positioning detection pieces 19 to the center of the circumference where the plurality of spray outlets 6 are positioned is greater than the distance from the spray outlets 6 to the center of the circumference; the distance from the sensing piece 20 to the center of the water distribution shifting piece 11 is the same as the distance from the positioning detection piece 19 to the center of the circumference where the plurality of spraying outlets 6 are located.

Because the second housing 101 and the water diversion poking piece 11 have limited arrangement areas, the area of the inner periphery of the spray outlet 6 is relatively small, and the preferred arrangement mode is that the positioning detection piece 19 is positioned at the outer periphery of the spray outlet 6, namely the distance from the positioning detection piece to the center of the periphery is larger than the distance from the spray outlet 6 to the center of the periphery, so that the installation of a plurality of positioning detection pieces 19 is convenient. The distance from the sensing piece 20 to the center of the water diversion shifting piece 11 is the same as the distance from the positioning detection piece 19 to the center of the circumference where the plurality of spraying outlets 6 are located, so that the positions of the sensing piece 20 and the positioning detection piece 19 can correspond up and down, and the accurate fitting and positioning of the sensing piece 20 and the positioning detection piece 19 are guaranteed.

A plurality of location detection piece 19 are located same circumference, only set up an response piece 20 alright in order to realize the laminating location with each location detection piece 19 through the rotation on the water diversion plectrum 11 to realize switching on of corresponding shower outlet 6, avoid the interference of a plurality of response pieces 20.

Except that the realization sprays the switching on of export 6, the water diversion device of this embodiment also can realize that the shutoff of spraying export 6 is closed, also can pinpoint when spraying export 6 seals, realizes various program functions of dish washer, and the concrete scheme is as follows:

furthermore, the spraying outlets 6 are arranged at certain intervals, and the area between at least two adjacent spraying outlets 6 is a plugging area 16 for plugging the through holes 12; when the through holes 12 rotate to the plugging area 16, each spraying outlet 6 is plugged; the blocking area 16 is correspondingly provided with a positioning detection piece 19.

Each spraying outlet 6 arranged on the plane of the second shell 101 is a through hole 12, and other areas are closed areas, and when the closed areas can completely cover the through holes 12 on the water diversion poking pieces 11, a blocking area 16 is formed. When the through holes 12 are rotated to the plugging area 16, any spray outlet 6 cannot be conducted, and each spray outlet 6 is closed. When the washing program of the dishwasher is finished and the spraying is closed, the through hole 12 of the water distribution poking piece 11 needs to be controlled to rotate to the area. Therefore, the positioning detection piece 19 correspondingly arranged in the blocking area 16 can be accurately positioned, so that the through holes 12 in the water diversion shifting piece 11 are aligned with the blocking area 16, and the closing of each spraying outlet 6 is realized.

The arrangement mode of the blocking area 16 may include various modes, for example, when two or three spraying outlets 6 are uniformly distributed on the same circumference, if the through holes 12 are matched with each spraying outlet 6, the area between two adjacent spraying outlets 6 is the blocking area 16. When two or three spray outlets 6 are asymmetrically arranged, the region between adjacent spray outlets 6 that can cover the through holes 12 is the plugging region 16.

Preferably, the positioning detection piece 19 corresponding to the plugging area 16 is located on a connecting line between the center of the plugging area 16 and the center of the circumference where each spraying outlet 6 is located, so that the through hole 12 on the water distribution shifting piece 11 can be accurately aligned with the center of the plugging area 16, deviation is avoided, and water leakage is avoided.

Preferably, the positioning detection piece 19 arranged corresponding to the blocking area 16 and the positioning detection piece 19 arranged corresponding to the spray outlet 6 are located on the same circumference.

Further scheme still includes the drive arrangement 17 that sets up in the first casing 91 outside, the middle part of water diversion plectrum 11 be provided with transmission shaft 18, transmission shaft 18 pass first casing 91 and be connected with drive arrangement 17, drive arrangement 17 drive water diversion plectrum 11 rotates, when location detection piece 19 and response piece 20 interact and laminating location, drive arrangement 17 stops.

The driving device 17 can be a motor or a water distribution motor, the motor drives the water distribution shifting piece 11 to slowly rotate through the transmission shaft 18, when a program needs to spray a certain path, the corresponding positioning detection piece 19 corresponding to the spray outlet 6 is conducted, when the interaction force of the sensing piece 20 and the positioning detection piece 19 is detected, the motor drives the water distribution shifting piece 11 to slowly rotate towards a set position through the transmission shaft 18, when the sensing piece 20 is close to and finally attached to the positioning detection piece 19, the corresponding spray outlet 6 is conducted with the through hole 12, the motor power supply is disconnected, the washing pump of the dish washing machine pumps water, and the water is sprayed through the spray outlet 6.

Therefore, the positioning detection piece 19 and the induction piece 20 can realize accurate positioning of the through hole 12 and the spraying outlet 6 through interaction force of the positioning detection piece and the induction piece, the positioning detection piece 19 can also transmit signals to a main control device of the dish-washing machine, and the main control device controls the action of the motor, so that the water quantity and pressure of the spraying outlet 6 are ensured, and the spraying effect is ensured.

In this embodiment, the positioning detecting element 19 and the sensing element 20 may be any kind of elements that can generate an interaction force when one of the elements is opened and can be attached together, and can transmit a signal to the control device, for example, the positioning detecting element 19 may be an electromagnetic element, the sensing element 20 may be an electromagnetic element that attracts the positioning detecting element 19 or a permanent magnet, or other kinds of elements.

Preferably, in this embodiment, the positioning detection member 19 is an electromagnetic element, the induction member 20 is a permanent magnet, the permanent magnet rotates along with the water diversion paddle 11, and when the electromagnetic element corresponding to a certain spraying outlet 6 is energized, the permanent magnet and the electromagnetic element attract each other and adhere to each other, so that the through hole 12 and the corresponding spraying outlet 6 are positioned and conducted.

Example two

As shown in fig. 1 to 11, this embodiment is a further limitation of the first embodiment, and several specific arrangements of the shower outlet 6 and the water distribution paddle 11 on the second housing 101, and specific arrangements of the positioning detection element 19 and the sensing element 20 are provided.

The embodiment provides a dish washer water diversion device, including first casing 91 and the second casing 101 that is connected, form the chamber that divides between first casing 91 and the second casing 101, divide the intracavity to be equipped with rotatable branch water plectrum 11, be equipped with on the second casing 101 and spray outlet 6, be equipped with through-hole 12 on the branch water plectrum 11, divide water plectrum 11 to rotate in order to switch on or the shutoff sprays outlet 6, through-hole 12 and the outline phase-match of single spraying outlet 6, be provided with on branch water plectrum 11 and the second casing 101 and be used for through-hole 12 and each spraying outlet 6 location switching on's location detection device.

In a further scheme, the spraying outlets 6 at least comprise two spraying outlets, each positioning detection device comprises a positioning detection piece 19 arranged on the second shell 101 and a sensing piece 20 arranged on the water diversion shifting piece 11, the positioning detection pieces 19 are arranged corresponding to the spraying outlets 6, and the sensing pieces 20 rotate along with the water diversion shifting pieces 11 and are mutually acted and attached with the different positioning detection pieces 19, so that the through holes 12 are positioned and communicated with the corresponding spraying outlets 6.

In a further scheme, the spray outlets 6 include a first spray outlet 13, a second spray outlet 14 and a third spray outlet 15 which are arranged on the second shell 101, and the spray outlets 6 are arranged on the same circumference with the axis of the second shell 101 as the center; each positioning detection piece 19 is arranged on a connecting line of the center of the corresponding spray outlet 6 and the center of the circumference where the spray outlet 6 is located, and the position of the sensing piece 20 corresponds to the position of the positioning detection piece 19.

Preferably, the axes of the first spray outlet 13, the second spray outlet 14 and the third spray outlet 15 are arranged in parallel.

The first spray outlet 13, the second spray outlet 14 and the third spray outlet 15 are arranged on the disc-shaped plane 101 of the second housing 101, the three spray outlets 6 can be symmetrically arranged on the plane or asymmetrically arranged, and the size of the spray outlets 6 and the angle between adjacent spray outlets 6 can be set according to requirements.

In a further scheme, the first spraying outlet 13, the second spraying outlet 14 and the third spraying outlet 15 have the same outline, and the through holes 12 are matched with the outline of each spraying outlet 6; the distance from the positioning detection piece 19 to the center of the circumference where the plurality of spraying outlets 6 are positioned is greater than the distance from the spraying outlets 6 to the center of the circumference; the distance from the sensing piece 20 to the center of the water distribution shifting piece 11 is the same as the distance from the positioning detection piece 19 to the center of the circumference where the plurality of spraying outlets 6 are located.

In a further scheme, the positioning detection piece 19 and the corresponding spraying outlet 6 are located on two sides of the center of the second housing 101, and the sensing piece 20 and the through hole 12 are located on two sides of the center of the water diversion poking piece 11. Therefore, the distance between the spray outlet 6 and the corresponding positioning detection piece 19 is enlarged, so that the influence of the water pressure on the positioning detection piece 19 when the spray outlet 6 is communicated can be avoided, and the positioning accuracy between the positioning detection piece 19 and the induction piece 20 is ensured.

Preferably, the positioning detection part 19 is an electromagnetic element, the induction part 20 is a permanent magnet, the permanent magnet rotates along with the water diversion poking piece 11, and when the electromagnetic element corresponding to one spraying outlet 6 is electrified and the permanent magnet and the electromagnetic element are mutually acted and attached, the through hole 12 and the corresponding spraying outlet 6 are positioned and conducted.

In a further scheme, the first spraying outlets 13, the second spraying outlets 14 and the third spraying outlets 15 are arranged at certain intervals, and an area between at least two adjacent spraying outlets 6 is a plugging area 16 for plugging the through holes 12; when the through holes 12 rotate to the plugging area 16, each spraying outlet 6 is plugged; the blocking area 16 is correspondingly provided with a positioning detection piece 19.

Each spraying outlet 6 arranged on the plane of the second shell 101 is a through hole 12, and other areas are closed areas, so that when the closed areas can completely cover the through holes 12 on the water diversion and shifting sheet 11, a blocking area 16 is formed. When the through holes 12 are rotated to the plugging area 16, any spray outlet 6 cannot be conducted, and each spray outlet 6 is closed. When the washing program of the dishwasher is finished and the spraying is closed, the through hole 12 of the water distribution poking piece 11 needs to be controlled to rotate to the area. Therefore, the positioning detection piece 19 correspondingly arranged in the blocking area 16 can be accurately positioned, so that the through holes 12 in the water diversion shifting piece 11 are aligned with the blocking area 16, and the closing of each spraying outlet 6 is realized.

The arrangement mode of the blocking area 16 may include various modes, for example, when two or three spray outlets 6 are uniformly distributed on the same circumference, if the through holes 12 are matched with each spray outlet 6, the area between two adjacent spray outlets 6 is the blocking area 16. When two or three spray outlets 6 are asymmetrically arranged, the region between adjacent spray outlets 6 that can cover the through holes 12 is the plugging region 16.

Preferably, the positioning detection piece 19 arranged corresponding to the blocking area 16 is positioned on a connecting line of the center of the blocking area 16 and the center of the circumference where each spraying outlet 6 is positioned;

Specifically, the first spraying outlet 13, the second spraying outlet 14, the third spraying outlet 15, and the blocking area 16 are respectively provided with corresponding electromagnetic elements. The four electromagnetic elements are all located on a connecting line from the center of the corresponding spray outlet 6 or the blocking area 16 to the center of the disc-shaped plane 101, are located on the same circumference, and are located at a distance from the center of the disc-shaped plane 101 which is larger than the distance from the center of the corresponding spray outlet 6 to the center of the disc-shaped plane 101. The sensing piece 20 arranged on the water diversion shifting piece 11 is a permanent magnet which is positioned on a connecting line from the through hole 12 to the center of the water diversion shifting piece 11, positioned on the same circumference with each electromagnetic element and attracted and attached when rotating to the electromagnetic elements.

Specifically, the following two schemes can be included but not limited,

in the scheme 1, as shown in fig. 6 to 8, the first spraying outlets 13, the second spraying outlets 14 and the third spraying outlets 15 are uniformly distributed at intervals on the same circumference; the areas between two adjacent spraying outlets 6 are the same and are plugging areas 16; the positioning detection pieces 19 are positioned on the same circumference of the outer peripheries of the spray outlet 6 and the blocking area 16, and the spray outlet 6 or the blocking area 16 corresponding to the positioning detection pieces are oppositely arranged by taking the axis of the second shell 101 as the center.

In the scheme of the 2 nd scheme, the first spraying outlet 13, the second spraying outlet 14 and the third spraying outlet 15 are positioned on the same circumference, the first spraying outlet 13 and the third spraying outlet 15 are oppositely arranged, and the second spraying outlet 14 is arranged in the center between the first spraying outlet 13 and the third spraying outlet 15; the position opposite to the second spraying outlet 14 is a plugging area 16; the positioning detection pieces 19 are positioned on the same circumference of the outer peripheries of the spray outlet 6 and the blocking area 16, and the corresponding spray outlet 6 or the corresponding blocking area 16 is arranged oppositely by taking the axis of the second housing 101 as the center.

In the scheme, the included angle formed by the connecting line of the centers of the adjacent spraying outlets 6 and the center of the second shell 101 is 90 degrees, and the included angle formed by the connecting line of the center of the plugging area 16 and the center of the second shell 101 and the connecting line of the centers of the adjacent spraying outlets 6 and the center of the second shell 101 is 90 degrees.

The above two preferable modes can realize the conduction of the independent spraying water channel, and the electromagnetic elements corresponding to the spraying outlets 6 are matched with the permanent magnets on the water diversion shifting sheet 11, so that the accurate positioning can be realized.

In addition, as shown in fig. 8 to 10, the first spray outlet 13, the second spray outlet 14 and the third spray outlet 15 are uniformly distributed on the same circumference, and the through holes 12 on the water diversion poking piece 11 are matched with the outline formed by two adjacent spray outlets 6.

The first spraying outlets 13, the second spraying outlets 14 and the third spraying outlets 15 are uniformly distributed on the same circumference at intervals, and each positioning detection piece 19 is arranged on a connecting line of the center of the corresponding spraying outlet 6 and the center of the circumference where the spraying outlet 6 is located and a connecting line of the midpoint of the two adjacent spraying outlets 6 and the center of the second shell 101; preferably, the positioning detectors 19 are located on the same circumference and located at the outer periphery of the shower outlet 6.

The through holes 12 are arc holes matched with the outer contours of two adjacent spraying outlets 6, and the sensing part 20 is arranged on a connecting line between the center of the arc hole and the center of the water diversion shifting piece 11 and corresponds to the position of the positioning detection part 19.

The positioning detection piece 19 and the corresponding spraying outlet 6 are positioned on two sides of the central axis of the second shell 101, and the induction piece 20 and the through hole 12 are positioned on two sides of the central axis of the water diversion poking piece 11.

In this kind of scheme, first spray outlet 13, second spray outlet 14 and third spray outlet 15 set up around the central symmetry of circumference, and water diversion plectrum 11 can align with a spray outlet 6 alone, realizes switching on of solitary spraying water route, also can align with two adjacent spray outlets 6 simultaneously, and two present spraying water routes switch on.

EXAMPLE III

As shown in fig. 1 to 11, this embodiment is a further limitation of the first embodiment or the second embodiment, the first housing 91 is provided with a water inlet 3 and a water outlet 5, the water inlet 3 and the water outlet 5 are communicated with the water diversion chamber, and water flows into the water diversion chamber through the water inlet 3 and is guided out through the water outlet 5 and/or the spray outlet 6.

The water diversion device of the general dishwasher is only provided with a water inlet 3 and a spraying outlet 6, a washing pump at the bottom of the dishwasher pumps water to the water inlet 3, and the water enters the spraying device at the inner part of the dishwasher from the spraying outlet 6. The washing water is heated or needs to be additionally provided with a pipeline and a control valve when being recycled, so that the cost is increased, the pipeline inside the dish washing machine is complex, and the maintenance is inconvenient.

The water diversion device of the embodiment is not only provided with the spraying outlet 6, but also additionally provided with the water outlet 5, and the water outlet 5 can be communicated with other components, for example, a heat exchange component so as to circularly heat the washing water, or can be communicated with a recovery energy storage device so as to recover the water or heat energy of the washing water; or may communicate with other special components as desired. Therefore, a control valve is not needed to be additionally arranged, the water diversion device can be realized only through the water diversion device, the internal structure of the dish washing machine is simplified, and the occupied space is reduced.

Specific embodiments may include, but are not limited to, the following:

scheme 1, the delivery port 5 of water diversion device and the heat transfer pipeline intercommunication of the heating device of dish washer, water inlet 3 and delivery port 5 switch on all the time, the rivers in the water diversion cavity flow out through delivery port 5, perhaps flow out by delivery port 5 and spraying outlet 6.

In this scheme, water inlet 3 of water diversion device keeps normal open state, and water inlet 3 can be direct or indirect with the heating device's of dish washer pipeline intercommunication, so, flow out all the way rivers by delivery port 5 and can keep with heating device's heat exchange state, continuously heat the washing water to improve the washing effect. Spray when heating washing water, raise the efficiency.

When the spraying outlet 6 is blocked, the water flow entering the water diversion chamber from the water inlet 3 only flows out from the water outlet 5, and exchanges heat with a heating device of the dish washing machine to heat washing water; and when one or more spray outlets 6 are conducted, the water flow entering from the water inlet 3 can be sprayed out through the water outlet 5 and the spray outlets 6 at the same time, and the processes of spraying, washing and washing water heating are carried out simultaneously, so that the mutual influence is avoided, the time is saved, and the efficiency is improved.

In a further scheme, the diameter of the water outlet 5 is smaller than that of the water inlet 3.

The water diversion device is generally arranged at the bottom of the dish washing machine, the washing pump is arranged at the bottom of the dish washing machine, the washing water in the dish washing machine is pumped into the water diversion device, and spraying in different water paths is carried out according to the setting of a program. The water inlet 3 of the water diversion device is thus in communication with the water outlet 5 of the washing pump, where the water delivered by the washing pump to the water diversion device is redistributed. The spray outlet 6 needs a larger water amount to ensure that the spraying water flow strength is enough to achieve a better spraying and flushing effect. Because the water outlet 5 is always communicated with the water inlet 3, in order to ensure the water quantity entering the spraying outlet 6, the diameter of the water outlet 5 needs to be smaller than or even far smaller than that of the inlet and the outlet so as to ensure that the water quantity entering the spraying outlet 6 is sufficient, and only a small part of water flows flow out of the water outlet 5 for heating.

In a further scheme, the water inlet direction of the water outlet 5 deviates from the water outlet direction of the water inlet 3, and the axis of the water outlet 5 and the axis of the water inlet 3 form a certain included angle.

The water outlet 5 and the water inlet 3 are both communicated with the first chamber 7, when water enters the water inlet 3, if the water inlet 3 is opposite to the water outlet 5, water flow can easily and directly flush the water outlet 5 from the water inlet 3, and the water quantity and the water pressure entering the spraying outlet 6 are influenced. In this scheme, the water inlet direction of delivery port 5 deviates from the water outlet direction of water inlet 3, and namely both are not direct relative, and both's axis is not on a straight line, becomes certain contained angle setting. So, play the effect of blockking to the rivers of intaking, rivers can be steady get into first cavity 7 and second cavity 8, are favorable to controlling the trend of rivers, guarantee to spray the effect, reach the purpose of controlling 5 rivers of delivery port simultaneously.

In a further scheme, the water outlet 5 and the water inlet 3 are arranged on the side wall of the first shell 91, the axes of the water inlet 3 and the water outlet 5 and the axis of the first shell 91 form a certain included angle, and preferably, the water outlet 5 and the water inlet 3 are arranged perpendicular to the side wall of the first chamber 7. The water outlet 5 may be provided in the L region as shown in fig. 5. Preferably, the vertical distance from the axis of the water outlet 5 to the surface of the second casing 101 is smaller than the vertical distance from the axis of the water inlet 3 to the surface of the second casing 101.

Scheme 2: and a control device for controlling the opening and closing of the water outlet 5 is arranged at the water outlet. The water outlet 5 can be communicated with other components, for example, can be communicated with a recovery energy storage device for water recovery or heat energy recovery of the washing water; or may communicate with other special components as desired. The water outlet 5 is provided with a control device, and the water outlet 5 can be opened or closed according to the requirement. Therefore, other structures do not need to be additionally arranged, the water diversion device can be realized only by the water diversion device of the embodiment, the internal structure of the dish washing machine is simplified, and the occupied space is reduced.

In a further scheme, a connecting pipeline is arranged on the water outlet 5, the control device is a control valve, and the control valve is arranged at the water outlet 5 or in the connecting pipeline and used for controlling the on-off of water flow in the connecting pipeline. The connecting pipeline arranged at the water outlet 5 is convenient for connecting other devices, receiving the washing water flowing out of the water outlet 5 and is also beneficial to arranging a control valve.

In a further scheme, one end of the connecting pipeline is connected with a water outlet 5, the other end of the connecting pipeline is connected with a recovery energy storage device of the dish washing machine, when the spraying outlet 6 is closed, the control valve is opened, and water flow is guided out from the water outlet 5;

or the spraying outlet 6 is communicated, the control valve is opened at the same time, and water flows out through the water outlet 5 and the spraying outlet 6.

When the spraying outlets 6 are closed after the washing is finished, the washing water in the dishwasher is generally directly discharged, and the water and the heat energy are wasted. And in this scheme open the control valve, delivery port 5 with retrieve energy memory intercommunication, then can carry the washing water to retrieving energy memory, recycle this part water and heat recovery, improve dish washer's heat utilization rate.

In the washing process, the spraying outlet 6 is opened for spraying, the control valve is opened, and partial water flow can flow out from the water outlet 5 and can be used for other purposes according to the needs of users.

According to the further scheme, the output of the washing pump of the dish washing machine can be adjusted according to the water distribution condition, so that the optimal washing effect is achieved. When the washing pump (washing motor) with variable speed is used for washing, the pressure and flow conditions of each water outlet 5 can be calculated in advance according to the quantity of the washing spray outlets 6, the positions of the spray outlets 6 and the like, and the washing pump can be automatically regulated to achieve the optimal washing effect and energy interaction effect, so that the optimal effect is achieved.

For example, the output of the washing pump can be provided with a plurality of gears, and each gear corresponds to the output of parameters such as the rotating speed, the power and the frequency of the washing pump under different water diversion conditions. For example, the first level corresponds to the requirement of one spray outlet 6, the second level corresponds to the requirement of two spray outlets 6, and the third level corresponds to the requirement of opening the spray outlets 6 on the water diversion toggle piece 11 and the water outlets 5 on the first shell 91 at the same time, and so on.

Example four

The embodiment provides a dishwasher with the water diversion device described in the first embodiment, the second embodiment or the third embodiment, the dishwasher comprises a main control device and a plurality of spraying devices, a plurality of spraying outlets 6 of the water diversion device are respectively communicated with the plurality of spraying devices, and the positioning detection device is electrically connected with the main control device.

The drive unit 17 on the water diversion device is also electrically connected to the main control unit and is controlled by the main control unit. Therefore, the main control device of the dish washing machine can position the detection device according to the program control and control the driving device 17 according to the signal of the positioning detection device, and the positioning is realized without calculating the conduction time of the motor through the rotation angle, so that the alignment accuracy of the through hole 12 and the spray outlet 6 can be greatly improved, the deviation of the through hole and the spray outlet caused by the error of the rotation angle of the motor is avoided, the phenomenon of water flow reduction is caused, and the spray effect is improved.

In addition, the embodiment further provides a control method of the dishwasher, which specifically includes:

when the dish washer sprays and washes, the main control device controls the water diversion shifting piece 11 to rotate, and the positioning detection device controls the through hole 12 to be positioned and communicated with the corresponding spraying outlet 6 for spraying.

As a more specific scheme:

when the dishwasher is used for spray washing, the main control device controls the driving device 17 to drive the water diversion shifting piece 11 to rotate, and the positioning detection piece 19 corresponding to the corresponding spray outlet 6 is started, the induction piece 20 of the water diversion shifting piece 11 rotates towards the corresponding positioning detection piece 19, when the two are attached, the through hole 12 is aligned and communicated with the corresponding spray outlet 6, and the driving device 17 stops working;

or the main control device controls the driving device 17 to drive the water diversion shifting piece 11 to rotate, and opens the positioning detection piece 19 corresponding to the blocking area 16, the sensing piece 20 of the water diversion shifting piece 11 rotates towards the corresponding positioning detection piece 19, when the two pieces are jointed, the through hole 12 is aligned with the blocking area 16, and each spraying outlet 6 is blocked; preferably, when the water outlet 5 of the water diversion device is opened, the water flow is guided out through the water outlet 5.

More specific schemes include:

when the program mode of the dish-washing machine runs to a certain spraying program, the main control device energizes the electromagnetic element corresponding to the spraying outlet 6 for spraying downwards to generate magnetic force, the water diversion motor drives the water diversion shifting piece 11 to rotate slowly through the transmission shaft 18, when the main control device detects that the energized electromagnetic element attracts the permanent magnet on the water diversion shifting piece 11, the water diversion shifting piece 11 is controlled to rotate slowly towards a set position, and after the permanent magnet attracts the electromagnetic device, the power supply of the motor is disconnected, the washing pump is controlled to pump water for spraying downwards.

When heat recovery is needed, the main control device energizes the electromagnetic element corresponding to the blocking area 16 to generate magnetic force, the permanent magnet is controlled to be attracted with the electromagnetic element, the through hole 12 on the water distribution shifting piece 11 corresponds to the blocking area 16, each spraying outlet 6 is closed, meanwhile, the water outlet 5 of the water distribution device is controlled to be opened, and washing water enters the energy recovery and storage device through the water outlet 5, so that heat energy recovery is realized.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims

1. A water diversion device of a dish washing machine comprises a first shell and a second shell which are connected, a water diversion cavity is formed between the first shell and the second shell, a rotatable water diversion shifting sheet is arranged in the water diversion cavity, a spray outlet is arranged on the second shell, a through hole is arranged on the water diversion shifting sheet, the water diversion shifting sheet rotates to conduct or block the spray outlet, and the water diversion device is characterized in that the through hole is matched with the outer contour of a single spray outlet, and positioning detection devices for positioning and conducting the through hole and each spray outlet are arranged on the water diversion shifting sheet and the second shell; the positioning detection device comprises a positioning detection piece arranged on the second shell and a sensing piece arranged on the water diversion shifting piece;

the first shell is provided with a water inlet and a water outlet, the water inlet and the water outlet are communicated with the water diversion cavity, water flow enters the water diversion cavity through the water inlet, the water outlet of the water diversion device is communicated with a heat exchange pipeline of a heating device of the dish washing machine, the water inlet and the water outlet are always communicated, and the water flow in the water diversion cavity flows out through the water outlet or flows out from the water outlet and a spraying outlet; the diameter of the water outlet is smaller than that of the water inlet; the water inlet direction of the water outlet deviates from the water outlet direction of the water inlet, the axis of the water outlet and the axis of the water inlet form a certain included angle, the water outlet and the water inlet are arranged on the side wall of the first shell, and the axes of the water inlet and the water outlet and the axis of the first shell form a certain included angle; the vertical distance from the axis of the water outlet to the surface of the second shell is smaller than that from the axis of the water inlet to the surface of the second shell;

the spraying outlets comprise a first spraying outlet, a second spraying outlet and a third spraying outlet which are arranged on the second shell, and the spraying outlets are arranged on the same circumference by taking the axis of the second shell as the center; each positioning detection piece is arranged on a connecting line of the center of the corresponding spraying outlet and the center of the circumference where the spraying outlet is located, and the position of the induction piece corresponds to the position of the positioning detection piece;

the first spraying outlet, the second spraying outlet and the third spraying outlet are positioned on the same circumference, the first spraying outlet and the third spraying outlet are oppositely arranged, and the second spraying outlet is arranged in the center between the first spraying outlet and the third spraying outlet; the position opposite to the second spraying outlet is a plugging area; the plurality of positioning detection pieces are positioned on the same circumference of the peripheries of the spray outlet and the blocking area, and the spray outlet or the blocking area corresponding to the positioning detection pieces are oppositely arranged by taking the axis of the second shell as the center.

2. The water distribution device of a dishwasher according to claim 1, wherein the first spray outlet, the second spray outlet and the third spray outlet have the same contour, and the through hole is matched with the contour of each spray outlet; the distance from the positioning detection piece to the center of the circumference where the plurality of spraying outlets are located is greater than the distance from the spraying outlets to the center of the circumference; the distance from the sensing piece to the center of the water diversion shifting piece is the same as the distance from the positioning detection piece to the center of the circumference where the plurality of spraying outlets are located.

3. The water diversion device of claim 1 wherein said positioning detection member and its corresponding spray outlet are located on both sides of the center of the second housing, and said sensing member and through hole are located on both sides of the center of the water diversion paddle.

4. The dishwasher of claim 3, wherein the positioning detection member is an electromagnetic element, the sensing member is a permanent magnet, the permanent magnet rotates along with the water diversion paddle, and when the electromagnetic element corresponding to a spray outlet is energized and the permanent magnet interacts and fits with the electromagnetic element, the through hole and the corresponding spray outlet are positioned and conducted.

5. The water distribution device of a dishwasher according to claim 1, wherein the positioning detection member disposed in correspondence with the blocking area is located on a line connecting the center of the blocking area and the center of the circumference where each spray outlet is located.

6. A dishwasher having a water distribution device according to any one of claims 1 to 5, comprising a main control device and a plurality of spray devices, wherein a plurality of spray outlets of the water distribution device are respectively communicated with the plurality of spray devices, and the positioning detection device is electrically connected with the main control device.

7. The control method of the dish-washing machine as claimed in claim 6, wherein when the dish-washing machine performs spray washing, the main control device controls the rotation of the water diversion poke piece, and the positioning detection device controls the through hole to be positioned and communicated with the corresponding spray outlet for spraying.

8. The control method according to claim 7, wherein the main control device controls the water diversion shifting piece to rotate and starts the positioning detection piece corresponding to the corresponding spray outlet, the sensing piece of the water diversion shifting piece rotates towards the corresponding positioning detection piece, when the two pieces are jointed, the through hole is aligned and communicated with the corresponding spray outlet, and the water diversion shifting piece stops rotating;

or the main control device controls the water distribution shifting piece to rotate, the positioning detection piece corresponding to the plugging area is opened, the sensing piece of the water distribution shifting piece rotates towards the corresponding positioning detection piece, when the water distribution shifting piece and the positioning detection piece are attached, the through hole is aligned with the plugging area, and each spraying outlet is plugged.