Automatic throwing device and control method of automatic throwing device

Abstract

The invention discloses an automatic throwing device and a control method of the automatic throwing device. The automatic feeding device comprises a water inlet pipeline and a liquid storage cavity, the water inlet pipeline is provided with a negative pressure generator which generates negative pressure through water flow flowing through the water inlet pipeline, and a liquid outlet of the liquid storage cavity is communicated with a negative pressure opening of the negative pressure generator through the liquid inlet pipeline provided with a suction pump. The suction pump is additionally arranged on the liquid inlet pipeline which is communicated with the liquid outlet of the liquid storage cavity and the negative pressure opening of the negative pressure generator, the suction pump can control the putting amount and putting time of the detergent put by the automatic putting device every time, so that the automatic putting device can accurately put the detergent, the situation that the detergent is put too much or insufficient is avoided, and the working efficiency is improved. Waste of detergent can be reduced, and the washing effect on clothes is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and specifically relates to an automatic dosing device and a control method for the automatic dosing device. Background Art

[0002] With the rapid development of technology, the continuous improvement of people's living standards, and the popularization and wide use of detergents, in response to user needs, many models of washing machines on the market currently have an additional automatic dosing device. The automatic dosing device can achieve automatic dosing of detergents, avoiding repeated labor for users.

[0003] The existing automatic dosing device includes a water inlet pipeline, a liquid inlet pipeline, and a liquid storage cavity. A Venturi tube is provided on the water inlet pipeline, and a negative pressure port is provided at the throat of the Venturi tube. The negative pressure port is communicated with the liquid storage cavity through the liquid inlet pipeline. By using the water flow flowing through the water inlet pipeline to generate negative pressure at the throat of the Venturi tube, the negative pressure sucks the detergent in the liquid storage cavity into the water inlet pipeline through the liquid inlet pipeline. The sucked detergent enters the washing machine under the impact of the water flow in the water inlet pipeline, realizing the automatic dosing of the detergent by the automatic dosing device. However, the method of using the Venturi tube to generate negative pressure for automatic dosing of the detergent cannot control the dosing amount, dosing time, etc. of the detergent, resulting in the inability of the automatic dosing device to accurately dose the detergent.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an automatic dosing device and a control method for the automatic dosing device. By adding a suction pump to the liquid inlet pipeline connecting the liquid outlet of the liquid storage cavity and the negative pressure port of the negative pressure generator, the suction pump can control the dosing amount and dosing time of the detergent for each dosing of the automatic dosing device, enabling the automatic dosing device to accurately dose the detergent, avoiding the situation of excessive or insufficient dosing of the detergent, achieving the purpose of reducing the waste of detergent and improving the washing effect on clothes.

[0006] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is:

[0007] The present invention provides an automatic dosing device, including a water inlet pipeline and a liquid storage cavity. A negative pressure generator that generates negative pressure using the water flow flowing through the water inlet pipeline is provided on the water inlet pipeline. The liquid outlet of the liquid storage cavity is communicated with the negative pressure port of the negative pressure generator through a liquid inlet pipeline provided with a suction pump.

[0008] Further, a suction cavity is formed inside the suction pump. The liquid inlet of the suction cavity is communicated with the liquid outlet of the liquid storage cavity through the first part of the liquid inlet pipeline, and the liquid outlet of the suction cavity is communicated with the negative pressure port of the negative pressure generator through the second part of the liquid inlet pipeline.

[0009] Further, the suction chamber is columnar, the axis line of the suction chamber extends vertically, the liquid storage chamber is arranged below the suction chamber, the liquid inlet of the suction chamber is arranged on the end wall at the bottom of the suction chamber and is arranged towards the liquid inlet of the liquid storage chamber, the negative pressure generator is arranged on the outer periphery of the suction chamber, and the liquid outlet of the suction chamber is arranged on the outer peripheral wall of the suction chamber and is arranged towards the negative pressure port of the negative pressure generator.

[0010] Further, the first part of the liquid inlet pipeline is the liquid inlet section, the liquid inlet section extends vertically, the liquid inlet section extends upward to communicate with the liquid inlet of the suction chamber, the liquid inlet section extends downward and penetrates into the liquid storage box through the liquid inlet arranged at the top of the liquid storage box, and the liquid inlet extends downward to the bottom of the liquid storage box.

[0011] Further, the second part of the liquid inlet pipeline is the liquid outlet section, the liquid outlet section extends horizontally, one end of the liquid outlet section extending horizontally communicates with the liquid outlet of the suction chamber, and the other end of the liquid outlet section extending horizontally communicates with the negative pressure port of the negative pressure generator.

[0012] Further, the automatic dosing device includes a housing with an open top and a liquid storage box slidably mounted horizontally inside the housing. A liquid storage chamber is formed inside the liquid storage box. The top of the housing is provided with an upper cover for covering the open top of the housing. The suction pump and the water inlet pipeline are located outside the housing, and the suction pump and the negative pressure generator are fixed on the top of the upper cover.

[0013] Further, an upper convex portion protrudes upward from the top of the upper cover. The end wall at the bottom of the suction chamber is provided with a lower convex portion coaxial with the liquid inlet of the suction chamber and in a cylindrical shape. A liquid guiding channel with a radial dimension smaller than the radial dimension of the suction chamber is formed inside the lower convex portion. The bottom of the lower convex portion abuts against the top of the upper convex portion, and the outer periphery of the lower convex portion is fixed to the top of the upper convex portion. The liquid inlet pipeline extends upward and sequentially penetrates through the upper cover and the upper convex portion and is embedded in the liquid guiding channel.

[0014] Further, the negative pressure generator includes a Venturi tube. The negative pressure port of the negative pressure generator is arranged at the throat of the Venturi tube capable of generating negative pressure. The axis line of the Venturi tube extends horizontally, and the suction pump and the Venturi tube are distributed front and back along the sliding direction of the liquid storage box.

[0015] Further, the water inlet pipeline includes a water inlet section and a water outlet section. The water inlet section extends to the top of the upper cover to communicate with the water inlet of the Venturi tube. The water outlet of the Venturi tube communicates with the water outlet section. The water outlet section extends downward from the top of the upper cover to the bottom of the housing and communicates with a sprayer arranged at the bottom of the housing.

[0016] The present invention also provides a control method for an automatic dosing device. Using the automatic dosing device provided by the above technical solution, the control method includes:

[0017] First, turn on the suction pump. The suction pump sucks the detergent in the liquid storage cavity into the suction pump. Then, water is introduced into the water inlet pipeline to generate negative pressure in the negative pressure generator. The negative pressure sucks the detergent in the suction pump into the negative pressure generator, where it is mixed with the water flowing through the negative pressure generator in the liquid inlet pipeline and then discharged. Or,

[0018] While turning on the suction pump, water is introduced into the water inlet pipeline to generate negative pressure in the negative pressure generator. The suction pump and the negative pressure simultaneously suck the detergent in the liquid storage cavity into the negative pressure generator, where it is mixed with the water flowing through the negative pressure generator in the liquid inlet pipeline and then discharged.

[0019] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0020] By adding a suction pump to the liquid inlet pipeline connecting the liquid outlet of the liquid storage cavity and the negative pressure port of the negative pressure generator, the suction pump can control the discharge amount and discharge time of the detergent by the automatic dosing device each time, enabling the automatic dosing device to accurately discharge the detergent, avoiding the situation of excessive or insufficient discharge of the detergent, reducing the waste of the detergent, and improving the washing effect on clothes.

[0021] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0022] The accompanying drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0023] Figure 1 is a schematic structural diagram of the automatic dosing device provided by an embodiment of the present invention from the first perspective;

[0024] Figure 2 is Figure 1 an enlarged view at A;

[0025] Figure 3 is a schematic structural diagram of the automatic dosing device provided by an embodiment of the present invention with the upper cover removed;

[0026] Figure 4 is a schematic structural diagram of the automatic dosing device provided by an embodiment of the present invention from the second perspective.

[0027] Icons: 1 - housing; 2 - upper cover; 21 - upper convex part; 22 - mounting post; 3 - liquid storage box; 31 - detergent liquid storage box; 311 - detergent liquid storage cavity; 32 - softener liquid storage box; 321 - softener liquid storage cavity; 4 - liquid inlet pipeline; 41 - liquid inlet section; 42 - liquid outlet section; 5 - negative pressure generator; 51 - Venturi tube; 6 - suction pump; 61 - lower convex part; 62 - circumferential convex part; 621 - mounting hole; 7 - water inlet pipeline; 71 - water inlet section; 711 - first water inlet part; 712 - second water inlet part; 72 - water outlet section; 721 - first water outlet part; 722 - second water outlet part; 723 - third water outlet part; 8 - sprayer; 9 - water inlet valve assembly; 91 - main water inlet; 92 - first water outlet; 93 - second water outlet; 94 - main water outlet; 95 - first water inlet valve; 96 - second water inlet valve; 97 - main water inlet valve.

[0028] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0029] To make the objectives, 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 in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Such as Figures 1-4As shown in the figure, the present invention provides an automatic dosing device, which includes a water inlet pipeline 7 and a liquid storage chamber. A negative pressure generator 5 that generates negative pressure by using the water flow flowing through the water inlet pipeline 7 is provided on the water inlet pipeline 7. The liquid outlet of the liquid storage chamber is communicated with the negative pressure port of the negative pressure generator 5 through a liquid inlet pipeline 4 provided with a suction pump 6.

[0033] In an embodiment of the present invention, by adding a suction pump 6 to the liquid inlet pipeline 4 connecting the liquid outlet of the liquid storage chamber and the negative pressure port of the negative pressure generator 5, the suction pump 6 can control the dosing amount and dosing time of the detergent each time the automatic dosing device doses, so that the automatic dosing device can accurately dose the detergent, avoid the situation of excessive or insufficient dosing of the detergent, reduce the waste of the detergent, and improve the washing effect on clothes;

[0034] Both the negative pressure generator 5 and the suction pump 6 have the function of sucking the detergent. This solution uses the negative pressure generator 5 and the suction pump 6 to double suck the detergent. When one of the negative pressure generator 5 and the suction pump 6 has a problem, the suction of the detergent can still be realized;

[0035] The negative pressure generator 5 in this solution not only has the function of sucking the detergent, but also can be used as a mixing chamber for the detergent and water. The detergent and water are mixed in the negative pressure generator 5 and then dosed. The negative pressure effect of the negative pressure generator 5 can prevent the detergent from remaining in the mixing chamber formed by the negative pressure generator 5;

[0036] The negative pressure generator 5 can be a Venturi tube 51. Specifically, under the action of the negative pressure generated in the suction pump 6 and the Venturi tube 51 by the liquid inlet pipeline 4, the detergent in the liquid storage chamber is transported into the Venturi tube 51. The detergent entering the Venturi tube 51 is mixed with the water flowing through the Venturi tube 51 in the water inlet pipeline 7 in the Venturi tube 51 and then dosed. By controlling the operation of the suction pump 6, an appropriate amount of detergent can be extracted according to the weight of the clothes and the preset program, and the dosing amount, dosing time, dosing times, etc. of the detergent each time can be controlled.

[0037] Specifically, the control method of the automatic dosing device includes first turning on the suction pump 6, and the suction pump 6 sucks the detergent in the liquid storage chamber into the suction pump 6; then water is introduced into the water inlet pipeline 7 to generate negative pressure in the negative pressure generator 5, and the negative pressure sucks the detergent in the suction pump 6 into the negative pressure generator 5 to be mixed with the water flowing through the negative pressure generator 5 in the liquid inlet pipeline 4 and then dosed; or,

[0038] While turning on the suction pump 6, water is introduced into the water inlet pipeline 7 to generate negative pressure in the negative pressure generator 5, and the suction pump 6 and the negative pressure simultaneously suck the detergent in the liquid storage chamber into the negative pressure generator 5 to be mixed with the water flowing through the negative pressure generator 5 in the liquid inlet pipeline 4 and then dosed.

[0039] The automatic dosing device is applied to a washing machine, which can be a pulsator washing machine or a drum washing machine.

[0040] Furthermore, the automatic dosing device includes a housing 1 with an open top and a liquid storage box 3 slidably installed horizontally inside the housing 1. A liquid storage cavity is formed inside the liquid storage box 3. The top of the liquid storage box 3 has an open top to form a detergent addition port. The top of the housing 1 is provided with an upper cover 2 that seals the open top of the housing 1 and simultaneously seals the open top of the liquid storage box 3.

[0041] Specifically, taking the pulling direction of the liquid storage box 3 as the front-back direction as an example, the housing 1 is square. There are two liquid storage boxes 3 inside the housing 1. The two liquid storage boxes 3 are respectively a detergent liquid storage box 31 and a softener liquid storage box 32 arranged side by side left and right inside the housing 1. A detergent liquid storage cavity 311 is formed inside the detergent liquid storage box 31, and a softener liquid storage cavity 321 is formed inside the softener liquid storage box 32. The detergent liquid storage box 31 and the softener liquid storage box 32 can be integrally arranged and can be pulled out of the housing 1 simultaneously for adding detergent. The detergent liquid storage box 31 and the softener liquid storage box 32 can also be separately arranged.

[0042] Furthermore, a water inlet valve assembly 9 is provided at the rear side of the housing 1. The water inlet valve assembly 9 includes a housing, a first water inlet valve 95, a second water inlet valve 96, and a main water inlet valve 97. The housing is a long strip extending left and right. The first water inlet valve 95, the main water inlet valve 97, and the second water inlet valve 96 are distributed on the housing in the left-right direction. A main water inlet 91 connected to a faucet is provided at the rear side of the housing. The main water inlet 91 is located behind the first water inlet valve 95, the second water inlet valve 96, and the main water inlet valve 97, and is respectively communicated with the first water inlet valve 95, the second water inlet valve 96, and the main water inlet valve 97. The first water outlet 92 of the first water inlet valve 95 is provided on the top side of the housing. A first water outlet pipe extending left and right is provided at the first water outlet 92, and the outlet of the first water outlet pipe faces left. The second water outlet 93 of the second water inlet valve 96 is provided on the top side of the housing. A second water outlet pipe extending left and right is provided at the second water outlet 93, and the outlet of the second water outlet pipe faces right. The main water outlet 94 of the main water inlet valve 97 is provided on the top side of the housing. An L-shaped water outlet pipe is provided at the main water outlet 94, and the outlet of the L-shaped water outlet pipe faces right. The outlet of the L-shaped water outlet pipe is located in front of the outlet of the second water outlet pipe.

[0043] As Figure 2 and Figure 3 shown, in the embodiment of the present invention, a suction cavity is formed inside the suction pump 6. The liquid inlet of the suction cavity is communicated with the liquid outlet of the liquid storage cavity through the first part of the liquid inlet pipeline 4, and the liquid outlet of the suction cavity is communicated with the negative pressure port of the negative pressure generator 5 through the second part of the liquid inlet pipeline 4.

[0044] In an embodiment of the present invention, the suction pump 6 includes a pump housing, a suction chamber is formed in the pump housing, a liquid inlet of the liquid inlet pipeline 4 is communicated with a liquid outlet of the liquid storage chamber, and a liquid outlet of the liquid inlet pipeline 4 is communicated with a negative pressure port of the negative pressure generator 5. The suction pump 6 is disposed on the liquid inlet pipeline 4 between the liquid inlet and the liquid outlet of the liquid inlet pipeline 4, and the suction pump 6 divides the liquid inlet pipeline 4 into a first portion communicating with the liquid inlet of the suction pump 6 and the liquid outlet of the liquid storage chamber and a second portion communicating with the liquid outlet of the suction pump 6 and the negative pressure port of the negative pressure generator 5;

[0045] Furthermore, the suction chamber is columnar, and the axis of the suction chamber extends vertically. The liquid storage chamber is arranged below the suction chamber, the liquid inlet of the suction chamber is arranged on the end wall of the bottom of the suction chamber, and is arranged toward the liquid inlet of the liquid storage chamber, the negative pressure generator 5 is arranged on the periphery of the suction chamber, and the liquid outlet of the suction chamber is arranged on the outer peripheral wall of the suction chamber, and is arranged toward the negative pressure port of the negative pressure generator 5.

[0046] The pump housing is cylindrical, and the suction chamber formed in the pump housing is cylindrical, specifically, the suction chamber is circular; the liquid storage chamber is arranged below the suction chamber, so that the suction pump 6 can suck the detergent from bottom to top, and the axis of the suction chamber extends vertically, and the detergent in the liquid storage chamber enters the suction chamber from the bottom of the suction chamber, shortening the path of sucking the detergent and accelerating the detergent to enter the suction chamber; the detergent in the suction chamber enters the negative pressure generator 5 from the outer peripheral side of the suction chamber, preventing the detergent from entering the negative pressure generator 5 from the top of the suction chamber, reducing the height of the detergent sucked by the negative pressure generator 5, and accelerating the detergent to enter the negative pressure generator 5;

[0047] Specifically, the first part of the liquid inlet pipeline 4 is the liquid inlet section 41, which extends vertically. The liquid inlet section 41 extends upward to be connected with the liquid inlet of the suction chamber, and the liquid inlet section 41 extends downward and penetrates into the liquid storage box 3 through the liquid inlet provided at the top of the liquid storage box 3, and the liquid inlet extends downward to the bottom of the liquid storage box 3.

[0048] The liquid inlet pipeline 4 includes a liquid inlet section 41 connecting the liquid outlet of the liquid storage chamber and the liquid inlet of the suction chamber. The vertical extension of the liquid inlet section 41 allows the detergent in the liquid storage chamber to be directly sucked into the suction chamber from bottom to top, reducing the detergent residue in the liquid inlet section 41 and avoiding the detergent from clogging the liquid inlet section 41; the liquid inlet section 41 is made of soft material.

[0049] The liquid inlet section 41 extends downward to the bottom of the liquid storage box 3, so that the suction pump 6 can suck the detergent at the bottom of the liquid storage box 3 into the suction cavity, thereby preventing the detergent from being accurately dispensed due to a large amount of detergent remaining in the liquid storage box 3.

[0050] Specifically, the second part of the liquid inlet pipeline 4 is the liquid outlet section 42, which extends horizontally. One end of the horizontally extended liquid outlet section 42 is connected to the liquid outlet of the suction chamber, and the other end of the horizontally extended liquid outlet section 42 is connected to the negative pressure port of the negative pressure generator 5.

[0051] The liquid inlet pipeline 4 further includes a liquid outlet section 42 that connects the liquid outlet of the suction chamber and the negative pressure port of the negative pressure generator 5. The liquid outlet section 42 extends horizontally, so that the liquid outlet of the suction chamber and the negative pressure port of the negative pressure generator 5 are at the same height. If the liquid outlet of the suction chamber is higher than the negative pressure port of the negative pressure generator 5, it will cause the detergent to fail to enter the negative pressure generator 5 smoothly. If the liquid outlet of the suction chamber is lower than the negative pressure port of the negative pressure generator 5, it will cause the detergent to be blocked from entering the negative pressure generator 5. Therefore, setting the liquid outlet section 42 to extend horizontally can not only enable the detergent to enter the negative pressure generator 5 smoothly, but also accelerate the entry of the detergent into the negative pressure generator 5.

[0052] In an embodiment of the present invention, the automatic dosing device includes a housing 1 with an open top and a liquid storage box 3 that is horizontally slidably installed in the housing 1. A liquid storage cavity is formed in the liquid storage box 3. The top of the housing 1 is provided with an upper cover 2 that seals the open top of the housing 1. The suction pump 6 and the water inlet pipeline 7 are located outside the housing 1, and the suction pump 6 and the negative pressure generator 5 are fixed to the top of the upper cover 2.

[0053] In an embodiment of the present invention, the water inlet pipeline 7 and the suction pump 6 are located outside the housing 1, which facilitates the disassembly and installation of the water inlet pipeline 7 and the suction pump 6 and reduces the occupation of the space inside the housing 1. The suction pump 6 and the negative pressure generator 5 are fixed to the top of the upper cover 2, realizing the stacking of the suction pump 6, the negative pressure generator 5 and the upper cover 2, so that the automatic dosing device can occupy a reduced space.

[0054] Further, the top of the upper cover 2 protrudes upward to form an upper protrusion 21. The end wall at the bottom of the suction chamber is provided with a lower protrusion 61 that is coaxial with the liquid inlet of the suction chamber and is cylindrical. A liquid guide channel with a radial dimension smaller than the radial dimension of the suction chamber is formed on the inner circumference of the lower protrusion 61. The bottom of the lower protrusion 61 abuts against the top of the upper protrusion 21, and the outer circumference of the lower protrusion 61 is fixed to the top of the upper protrusion 21. The liquid inlet pipeline 4 extends upward and sequentially penetrates through the upper cover 2 and the upper protrusion 21 and is embedded in the liquid guide channel.

[0055] Specifically, the inside of the pump housing is hollow to form a suction chamber and a liquid guide channel that are distributed vertically. The liquid guide channel extends vertically, and the liquid guide channel guides the detergent in the liquid inlet pipeline 4 into the suction chamber;

[0056] The lower convex part 61 is also used to assemble the suction pump 6 on the upper cover 2. Specifically, the bottom of the lower convex part 61 abuts against the upper convex part 21 to realize the assembly of the lower convex part 61 and the upper cover 2. And, a circumferential convex part 62 extending along the radial direction of the lower convex part 61 is provided on the outer periphery of the lower convex part 61. An installation hole 621 is provided on the circumferential convex part 62. The installation hole 621 is a round hole, and the axis line of the installation hole 621 extends vertically. An installation post 22 protruding upward is further provided on the top of the upper cover 2. The installation post 22 is independently arranged from the upper convex part 21, and the axis line of the installation post 22 extends vertically. A connection hole for fixedly connecting with the installation hole 621 is provided on the installation post 22. Reinforcing ribs are provided on the outer periphery of the installation post 22, and the reinforcing ribs extend downward to connect with the top of the upper cover 2. The reinforcing ribs increase the structural strength of the installation post 22, so that the installation post 22 can stably fix the suction pump 6.

[0057] Further, the circumferential convex part 62 and the liquid outlet of the suction chamber are located on opposite sides of the suction chamber, preventing the position of the circumferential convex part 62 from affecting the setting of the liquid outlet section 42 of the liquid inlet pipeline 4.

[0058] Further, the negative pressure generator 5 includes a Venturi tube 51. The negative pressure port of the negative pressure generator 5 is provided at the throat of the Venturi tube 51 that can generate negative pressure. The axis line of the Venturi tube 51 extends horizontally, and the suction pump 6 and the Venturi tube 51 are distributed front and back along the pulling direction of the liquid storage box 3.

[0059] Specifically, taking the example of the detergent liquid storage box 31 being put in, the suction pump 6 and the Venturi tube 51 are located on the left side of the housing 1. The liquid outlet section 42 of the liquid inlet pipeline 4 is arranged between the suction pump 6 and the Venturi tube 51. The liquid inlet pipeline 4 is arranged at the rear side of the suction pump 6. The circumferential convex part 62 is arranged at the front side of the suction pump 6. The negative pressure port of the negative pressure generator 5 is arranged in the middle of the Venturi tube 51. The Venturi tube 51 fits the upper cover 2 and extends horizontally in the left - right direction. The Venturi tube 51 extends leftward to the left side of the housing 1.

[0060] As Figure 4 shown, further, the water inlet pipeline 7 includes a water inlet section 71 and a water outlet section 72. The water inlet section 71 extends to the top of the upper cover 2 and is communicated with the water inlet of the Venturi tube 51. The water outlet of the Venturi tube 51 is communicated with the water outlet section 72. The water outlet section 72 extends downward from the top of the upper cover 2 to the bottom of the housing 1 and is communicated with a sprayer 8 arranged at the bottom of the housing 1.

[0061] The water inlet section 71 includes a first water inlet part 711 and a second water inlet part 712. The first water inlet part 711 is communicated with the water outlet of the first water outlet pipe. The first water inlet part 711 extends horizontally in the left - right direction. The second water inlet part 712 extends from the rear to the front to the upper cover 2. The second water inlet part 712 extends gradually right - ward and forward from the rear. A transition elbow is provided between the first water inlet part 711 and the second water inlet part 712;

[0062] The second water inlet part 712 is communicated with the water inlet of the Venturi tube 51, and a transition elbow is arranged between the second water inlet part 712 and the Venturi tube 51;

[0063] The water outlet section 72 includes a first water outlet part 721, a second water outlet part 722 and a third water outlet part 723. The first water outlet part 721 extends vertically in the up and down direction. The first water outlet part 721 extends from the top of the housing 1 to the bottom of the housing 1. The first water outlet part 721 is communicated with the water outlet of the Venturi tube 51, and a transition elbow is arranged between the first water outlet part 721 and the Venturi tube 51. The second water outlet part 722 extends horizontally in the left and right direction. The second water outlet part 722 extends along the bottom of the housing 1. The second water outlet part 722 extends from the left side of the housing 1 to the middle of the housing 1. A transition elbow is arranged between the second water outlet part 722 and the first water outlet part 721. The third water outlet part 723 extends horizontally in the front and back direction. The third water outlet part 723 extends along the bottom of the housing 1. The third water outlet part 723 extends from the rear side of the housing 1 to the front side of the housing 1. A transition elbow is arranged between the third water outlet part 723 and the second water outlet part 722;

[0064] A sprayer 8 is arranged on the front side of the bottom of the housing 1. The sprayer 8 is located outside the housing 1. The sprayer 8 is strip-shaped and extends in the left and right direction. The water outlet of the third water outlet part 723 is connected to the middle of the sprayer 8. The sprayer 8 is provided with downward spray openings for spraying the detergent aqueous solution into the washing machine.

[0065] After the water flow and the detergent enter the Venturi tube 51, they are mixed to form a detergent aqueous solution. The detergent aqueous solution enters the water outlet section 72 from the water outlet of the Venturi tube 51, enters the sprayer 8 through the water outlet section 72, and is sprayed into the washing machine by the sprayer 8.

[0066] The above are only the preferred embodiments of the present invention, and there is no any form of limitation to the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent can make some changes or modifications to the equivalent embodiments with the same change within the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as it does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the scope of the present invention.

Claims

1. An automatic dispensing device, comprising a water inlet pipeline and a liquid storage chamber, wherein a negative pressure generator for generating negative pressure by using the water flow flowing through the water inlet pipeline is provided on the water inlet pipeline, and it is characterized in that The liquid outlet of the liquid storage cavity is communicated with the negative pressure port of the negative pressure generator through a liquid inlet pipeline provided with a suction pump.

2. The automatic dispensing device according to claim 1, wherein A suction cavity is formed inside the suction pump. The liquid inlet of the suction cavity is communicated with the liquid outlet of the liquid storage cavity through the first part of the liquid inlet pipeline, and the liquid outlet of the suction cavity is communicated with the negative pressure port of the negative pressure generator through the second part of the liquid inlet pipeline.

3. The automatic dispensing device according to claim 2, wherein The suction cavity is columnar, the axis line of the suction cavity extends vertically, the liquid storage cavity is arranged below the suction cavity, the liquid inlet of the suction cavity is arranged on the end wall at the bottom of the suction cavity and is arranged towards the liquid inlet of the liquid storage cavity, the negative pressure generator is arranged on the outer periphery of the suction cavity, and the liquid outlet of the suction cavity is arranged on the outer peripheral wall of the suction cavity and is arranged towards the negative pressure port of the negative pressure generator.

4. The automatic dispensing device according to claim 3, characterized in that, The first part of the liquid inlet pipeline is the liquid inlet section, the liquid inlet section extends vertically, the liquid inlet section extends upward to be communicated with the liquid inlet of the suction cavity, the liquid inlet section extends downward and penetrates into the liquid storage box through the liquid inlet arranged on the top of the liquid storage box, and the liquid inlet extends downward to the bottom of the liquid storage box.

5. The automatic dispensing device according to claim 3, characterized in that, The second part of the liquid inlet pipeline is the liquid outlet section, the liquid outlet section extends horizontally, one end of the liquid outlet section extending horizontally is communicated with the liquid outlet of the suction cavity, and the other end of the liquid outlet section extending horizontally is communicated with the negative pressure port of the negative pressure generator.

6. The automatic dispensing device according to any one of claims 1-5, characterized in that The automatic dosing device includes a housing with an open top and a liquid storage box slidably installed in the housing in the horizontal direction. A liquid storage cavity is formed in the liquid storage box. The top of the housing is provided with an upper cover for covering the open top of the housing. The suction pump and the water inlet pipeline are located outside the housing, and the suction pump and the negative pressure generator are fixed on the top of the upper cover.

7. The automatic dispensing device according to claim 6, wherein, An upper convex portion protrudes upward from the top of the upper cover. The end wall at the bottom of the suction cavity is provided with a lower convex portion coaxial with the liquid inlet of the suction cavity and in a cylindrical shape. A liquid guiding channel with a radial dimension smaller than the radial dimension of the suction cavity is formed inside the lower convex portion. The bottom of the lower convex portion abuts against the top of the upper convex portion, and the outer periphery of the lower convex portion is fixed to the top of the upper convex portion. The liquid inlet pipeline extends upward and sequentially penetrates through the upper cover and the upper convex portion and is embedded in the liquid guiding channel.

8. The automatic dispensing device according to claim 7, characterized in that The negative pressure generator includes a Venturi tube. The negative pressure port of the negative pressure generator is arranged at the throat of the Venturi tube capable of generating negative pressure. The axis line of the Venturi tube extends horizontally, and the suction pump and the Venturi tube are distributed front and back along the pulling direction of the liquid storage box.

9. The automatic dispensing device according to claim 8, characterized in that, The water inlet pipeline includes a water inlet section and a water outlet section. The water inlet section extends to the top of the upper cover and is communicated with the water inlet of the Venturi tube. The water outlet of the Venturi tube is communicated with the water outlet section. The water outlet section extends downward from the top of the upper cover to the bottom of the housing and is communicated with a sprayer arranged at the bottom of the housing.

10. A control method for an automatic dispensing device, characterized in that, Adopting the automatic dosing device according to any one of claims 1-9, the control method includes: First, turn on the suction pump, and the suction pump sucks the detergent in the liquid storage cavity into the suction pump; then, water is introduced into the water inlet pipeline to generate negative pressure in the negative pressure generator, and the negative pressure sucks the detergent in the suction pump into the negative pressure generator and mixes it with the water flowing through the negative pressure generator in the liquid inlet pipeline and then discharges it; or, While turning on the suction pump, water is introduced into the water inlet pipeline to generate negative pressure in the negative pressure generator, and the suction pump and the negative pressure simultaneously suck the detergent in the liquid storage cavity into the negative pressure generator and mix it with the water flowing through the negative pressure generator in the liquid inlet pipeline and then discharges it.

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