Additive feeding device and washing machine

Abstract

The invention provides an additive feeding device and a washing machine, and the additive feeding device comprises a water supply waterway which is used for water to flow through; the feeding unit is used for feeding an additive into the water supply waterway and mixing the additive with the water supply flow to form an additive mixed solution; a plurality of venturi tubes which are arranged in parallel are arranged on the water supply waterway, a negative pressure suction port of each venturi tube is communicated with external atmosphere, and external air enters from the negative pressure suction port under the action of liquid flowing through each venturi tube and is mixed with the additive mixed liquid to excite the additive mixed liquid to generate foam. A plurality of venturi tubes which are arranged in parallel are arranged on a water supply waterway, so that all additive solutions flowing through the venturi tubes are excited by pumped air, the foaming amount of an additive mixture fed outwards is further increased, and the washing effect of essence washing on clothes is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of clothing treatment equipment, and particularly relates to an additive dispensing device for a washing machine, and also relates to a washing machine equipped with the above additive dispensing device. Background Art

[0002] Existing washing machines generally have a water storage cylinder for holding washing water, and a rotatable washing cylinder is arranged in the water storage cylinder. Drainage holes communicating inside and outside are formed on the washing cylinder, so that the washing water flowing into the water storage cylinder can interactively flow inside and outside the washing cylinder through the drainage holes, so as to achieve the effect that the washing water contacts the load to be processed placed in the washing cylinder and the load is processed by using the washing water.

[0003] The additive dispensing method of the above existing washing machines is as follows: Through the additive dispensing device, the additive is dispensed into the pipeline communicated with the water storage cylinder of the washing machine, and then the dispensed additive flows into the water storage cylinder of the washing machine along the pipeline. Therefore, the additive dispensed by the existing method is inside the water storage cylinder of the washing machine and outside the washing cylinder, and cannot directly contact the load placed in the washing cylinder.

[0004] Then, when the washing machine executes the washing program, the dispensed additive is mixed with the washing water flowing into the water storage cylinder, and a part of the washing water mixed with the additive flows into the washing cylinder through the drainage holes and contacts the load to be processed in the cylinder, so that a small part of the additive mixed in the washing water can contact the load and act on the load. Therefore, the traditional additive dispensing method has the problems of low use efficiency of the dispensed additive and waste of the additive.

[0005] At the same time, in the traditional additive dispensing method, in order to ensure that the additive placed between the water storage cylinder and the washing cylinder contacts the load to be processed in the washing cylinder, a large amount of water needs to be flowed into the water storage cylinder until the water level of the washing water in the water storage cylinder is higher than the washing cylinder, so as to ensure that the washing water flows into the washing cylinder through the drainage holes and the additive contacts the load in the washing cylinder. Therefore, the traditional additive dispensing method also has the problem of excessive water consumption for additive dispensing.

[0006] In order to solve the above problems, the applicant previously proposed a technical solution of directly dispensing an additive mixture into the washing machine cylinder, directly acting the additive mixture on the clothes in the cylinder, and using the washing machine to perform efficient washing treatment on the clothes wetted by the mixture and with a high additive concentration.

[0007] However, in the above solution, the mixing effect of the additive and the inlet water in the dosing device is poor, and the uniformity of the mixed liquid dosed into the drum is very low. Moreover, since the additive and water are directly mixed in the water circuit of the dosing device, the mixing rate between the two liquids is slow, and the activity of the additive is not fully stimulated after mixing, which affects the effect of the additive on the laundry treatment.

[0008] In view of this, the present invention is specifically proposed. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an additive dosing device to achieve the purpose of directly dosing the additive through the water supply circuit. At the same time, the present invention also provides an additive dosing device to achieve foaming excitation of the additive and water in the water supply circuit, so that the additive and water form a mixed liquid containing foaming particles, and the additive mixed liquid containing foaming particles is dosed into the washing machine for use, thereby improving the effect of the dosed additive on the laundry treatment.

[0010] To achieve the above invention purpose, the basic concept of the technical solution adopted by the present invention is:

[0011] The present invention provides an additive dosing device, which includes: a water supply circuit for water to flow through; a dosing unit for dosing an additive into the water supply circuit to form an additive mixed liquid with the water flow; a plurality of Venturi tubes are arranged in parallel on the water supply circuit, and the negative pressure suction ports of each Venturi tube are connected to the external atmosphere. Under the action of the liquid flowing through each Venturi tube, external air enters from the negative pressure suction port and mixes with the additive mixed liquid to stimulate the generation of foam.

[0012] Further, an installation part protruding radially from the inner wall of the water supply circuit is provided in the water supply circuit. The installation part divides the water supply circuit into an upstream part and a downstream part; each Venturi tube is installed on the installation part, and both ends of the pipeline are respectively connected to the upstream part and the downstream part of the water supply circuit.

[0013] Further, an air vent cavity is provided on the lower side of the installation part. The air vent cavity is communicated with the external atmosphere through a ventilation channel; the negative pressure suction ports of each Venturi tube are all opened downward, and a notch is provided on the installation part to conduct the negative pressure suction port and the air vent cavity, so that each Venturi tube is communicated with the same air vent cavity.

[0014] Furthermore, the additive dispensing device includes a water box, and the water supply waterway is integrally arranged inside the upper cover of the water box; the upper cover is composed of an upper cover body and a lower cover body which are buckled up and down, and the opposite facing surfaces of the two cover bodies are provided with matching concave-convex structures, so that a water supply waterway is formed between the buckling contact surfaces of the two cover bodies; the upper cover body is provided with a downwardly protruding mounting portion formed by a block structure and located inside the water supply waterway, and each venturi tube is inserted and mounted on the same mounting portion to connect the water supply waterway parts on both sides of the mounting portion; the lower cover body is provided with a downwardly concave, open-top groove-like structure, and the mounting portion is correspondingly buckled above the open top of the groove-like structure, so that the groove-like structure forms a ventilation cavity.

[0015] Furthermore, a plurality of branch channels arranged horizontally at intervals are provided inside the block-shaped mounting portion, and both ends of each branch channel are respectively connected to the opposite sides of the block-shaped mounting portion; a venturi tube is coaxially inserted and mounted in each branch channel respectively, and both ends of the venturi tube are respectively connected to the upstream part and the downstream part of the water supply waterway on the opposite sides of the block-shaped mounting portion; a notch is provided on the lower side of the block-shaped mounting portion, and the notch is directly below the negative pressure suction port of each venturi tube to connect the inside of the venturi tube pipeline with the ventilation cavity; two circles of sealing rings are provided on the outer pipe wall of the venturi tube, and the two circles of sealing rings are respectively located on the upstream side and the downstream side of the notch for sealing the gap between the venturi tube and the branch channel; preferably, a semi-circular opening is provided on the pipe wall of the venturi tube, which is opened downward and arranged around half of the pipe wall, and the semi-circular opening is directly above the strip-shaped notch, and the width of the semi-circular opening is smaller than the width of the strip-shaped notch.

[0016] Furthermore, the branch channel is a straight pipe section with an axis extending in the horizontal direction; the venturi tube includes an inlet pipe section and an outlet pipe section which are coaxially connected with different diameters; the inlet pipe section with a smaller diameter is correspondingly coaxially inserted into the branch channel, and the outlet pipe section with a larger diameter is located outside the mounting block and in the downstream part of the water supply waterway; the radial dimension of the outer circumference of the pipe wall of the inlet pipe section is equal to the radial dimension of the inner circumferential pipe hole of the branch channel; the end surface where the inlet pipe section is connected to the outlet pipe section abuts against the side of the mounting portion facing the downstream part of the water supply waterway.

[0017] Furthermore, a circular ring-shaped rib protruding radially inward is provided at one end of the branch channel connected to the upstream part of the water supply waterway, and the radial dimension of the inner circumference of the circular ring-shaped rib is smaller than the radial dimension of the outer pipe wall of the inlet pipe section of the venturi tube.

[0018] Furthermore, a mounting convex protruding outward is provided on the outer pipe wall of the outlet pipe section, and a mounting post protruding upward is provided on the lower cover body, and the mounting convex is correspondingly placed on the top of the mounting post, and the screw passes through the mounting convex from top to bottom and is threadedly engaged with the mounting post for installation.

[0019] Further, the bottom wall and the top wall of the water supply waterway on the upstream side of the Venturi tube are both inclined planes that gradually rise along the liquid flow direction. The two inclined planes are parallel to each other, and the distance between them is greater than the radial dimension of the outer tube wall of the Venturi tube. The bottom wall and the top wall of the water supply waterway on the downstream side of the Venturi tube are both flat planes. The two flat planes are parallel to each other, and the distance between them is greater than the radial dimension of the outer tube wall of the Venturi tube. The distance between the two inclined planes is less than the distance between the two flat planes.

[0020] Further, the flat plane of the bottom wall of the water supply waterway on the downstream side of the Venturi tube is flush with the lowest point height of the inclined plane of the bottom wall of the water supply waterway on the upstream side of the Venturi tube. The flat plane of the top wall of the water supply waterway on the downstream side of the Venturi tube is flush with the highest point height of the inclined plane of the top wall of the water supply waterway on the upstream side of the Venturi tube.

[0021] Further, the Venturi tube is divided into three coaxially arranged pipe sections that are sequentially connected in communication from the liquid inlet end to the liquid outlet end, namely a reduced-diameter pipe section, a straight pipe section, and an enlarged-diameter pipe section. The reduced-diameter pipe section is a conical pipe section with a gradually narrowing aperture along the liquid flow direction. The straight pipe section is a cylindrical pipe section with a consistent aperture, and the pipe diameter is greater than or equal to the maximum pipe diameter of the reduced-diameter pipe section or greater than or equal to the maximum pipe diameter of the enlarged-diameter pipe section. The enlarged-diameter pipe section is a conical pipe section with a gradually expanding aperture along the liquid flow direction. A semi-circular opening extending along the circumferential direction of the pipeline is provided on the lower part of the pipe wall of the straight pipe section, and the semi-circular opening constitutes a negative pressure suction port. Preferably, the negative pressure suction port covers at least one-third of the height part of the lower part of the pipe wall of the straight pipe section.

[0022] Further, a mixing structure is provided in the upstream part of the water supply waterway upstream of the Venturi tube. The connection point between the dosing unit and the water supply waterway is located upstream of the mixing structure, and the mixing structure mixes the dosed additive and the water supply to form an additive mixture.

[0023] Another object of the present invention is to provide a washing machine equipped with the above-mentioned additive dosing device to achieve the purpose of directly dosing the additive into the washing tub, and further to achieve direct contact between the dosed detergent and the load to be processed in the washing tub, thereby improving the utilization rate of the detergent.

[0024] To achieve the above-mentioned invention object, the basic concept of the technical solution adopted by the present invention is:

[0025] The present invention also discloses a washing machine, which includes a washing tub for containing the load to be processed, any one of the above-mentioned additive dosing devices. The inlet of the water supply waterway of the additive dosing device is connected to the washing machine water inlet pipe, and the outlet of the water supply waterway is connected to the liquid outlet structure, and the liquid outlet structure sprays towards the inside of the washing tub of the washing machine.

[0026] Further, the liquid outlet structure is provided on the housing of the washing machine, and / or the door body, and / or the water tub, and / or the window gasket. The jet outlet of the liquid outlet structure is opened towards the inside of the washing tub, and the additive solution foam mixture ejected by the liquid outlet structure is directly sprayed into the washing tub.

[0027] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0028] 1. With the above device of the present invention, the additive is directly discharged outward through the water path provided on the feeding device, avoiding the additive flowing through the water box. This not only shortens the flowing path of the additive, but also reduces the flushing water volume required for additive feeding, greatly improving the utilization rate of the additive. At the same time, the additive solution flowing out of the water path is directly ejected through the liquid outlet structure, which can increase the coverage area of the ejected additive solution, so that the additive solution can be directly sprayed onto the load to be processed deep in the washing tub.

[0029] 2. At the same time, by providing the above additive feeding device on the washing machine, the additive of the washing machine directly flows through the water supply path to the liquid outlet structure and is directly sprayed into the washing tub by the liquid outlet structure. Thus, the additive of the washing machine does not pass through the water box and the water tub outside the washing tub, but directly flows into the washing tub through the water path of the feeding device and is sprayed onto the load to be processed, thereby achieving the purpose of directly spraying the additive solution onto the load to be processed in the washing tub.

[0030] 3. Moreover, by providing a Venturi tube on the water supply path, air is introduced when the water flow in the water supply path flows through, so that air particles are mixed into the water flow flowing through the water supply path, in order to utilize the water inlet containing air particles to stimulate the added additive to foam and obtain an additive mixture containing foam particles with a better washing effect, thereby achieving a significant technological progress in enhancing the activity of the additive and strengthening the washing effect of the added additive mixture on the clothes. In particular, by providing a plurality of Venturi tubes arranged in parallel on the water supply path, all the flowing additive solutions are pumped and excited by air, thereby achieving a significant technological progress in increasing the foaming amount of the additive mixture discharged by the feeding device.

[0031] At the same time, the structure of the present invention is simple, the effect is remarkable, and it is suitable for popularization and use.

[0032] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0033] The accompanying drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0034] Figure 1 is a schematic structural diagram of a washing machine in an embodiment of the present invention;

[0035] Figure 2 is a schematic cross-sectional structural diagram of a washing machine in an embodiment of the present invention;

[0036] Figure 3 is a three-dimensional structural diagram of an additive dispensing device in an embodiment of the present invention;

[0037] Figure 4 is a top-view structural diagram of an additive dispensing device in an embodiment of the present invention;

[0038] Figure 5 is in an embodiment of the present invention Figure 4 A-A cross-sectional structural diagram of;

[0039] Figure 6 is in an embodiment of the present invention Figure 5 An enlarged structural diagram at the elliptical dotted line of;

[0040] Figure 7 is a three-dimensional structural diagram of the additive dispensing device with the upper cover removed in an embodiment of the present invention.

[0041] Description of main elements in the figure:

[0042] 100, dispensing device; 200, water storage cylinder; 300, washing cylinder; 400, window gasket; 500, liquid outlet structure; 600, conduit; 700, mixing structure; 1, water supply waterway; 2, water box; 3, upper cover; 31, upper cover body; 32, lower cover body; 15, turbine; 16, mixing chamber; 19, Venturi tube; 190, sealing ring; 191, negative pressure suction port; 192, liquid inlet end; 193, liquid outlet end; 194, liquid inlet pipe section; 195, liquid outlet pipe section; 196, constricted pipe section; 197, straight pipe section; 198, flared pipe section; 199, mounting convex; 110, mounting part; 111, branch channel; 112, notch; 113, annular rib; 114, vertical mating rib; 120, ventilation cavity; 121, ventilation channel; 122, vertical rib; 130, mounting post; 131, screw; 8, upstream part; 9, downstream part; 81, inclined surface; 91, flat surface.

[0043] 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 Embodiments

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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.

[0045] 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 therefore should not be construed as a limitation of the present invention.

[0046] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "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.

[0047] As Figures 1 to 2 shown, in the embodiments of the present invention, a washing machine is also introduced, which includes: a water storage cylinder 200 for storing water, a rotatable washing cylinder 300 for placing the load to be processed installed in the water storage cylinder 200, and an additive dispensing device 100 for directly dispensing additives into the washing cylinder 300. Through the above settings, the washing machine can achieve the use effect of directly dispensing additives into the washing cylinder 300 and directly spraying the dispensed additives onto the load to be processed in the washing cylinder 300, thereby achieving a significant technical progress in improving the utilization rate of additives.

[0048] As Figures 1 to 7 shown, the additive dispensing device 100 described in the embodiments of the present invention includes:

[0049] A water supply waterway 1 for allowing the incoming water flowing into the additive dispensing device 100 to flow through;

[0050] A dispensing unit for dispensing additives into the water supply waterway 1;

[0051] The liquid outlet structure 500 is connected to the outlet of the water supply waterway 1, and the liquid outlet structure 500 is arranged towards the inside of the washing tub 300 of the washing machine. When the additive is being dispensed, a small amount of water flows into the water supply waterway, so that the additive is mixed with the small amount of water in the water supply waterway 1 to form an additive solution. The additive solution supplied by the water supply waterway 1 can be directly sprayed onto the load to be processed in the washing tub 300 through the liquid outlet structure 500, thereby significantly improving the utilization rate of the dispensed additive.

[0052] Through the above device, the additive is directly dispensed outward through the waterway provided on the dispensing device 100, avoiding the additive flowing through the water box. This not only shortens the flow path of the additive but also reduces the amount of flushing water required for additive dispensing, greatly improving the utilization rate of the additive.

[0053] As Figures 1 to 7 shown, in the embodiment of the present invention, the water supply waterway 1 is integrated on the water box 2 of the additive dispensing device 100. The outlet of the water supply waterway 1 is arranged outside the water box 2, and the liquid outlet structure 500 is arranged outside the water box 2. The outlet of the water supply waterway 1 is connected to the liquid outlet structure 500 through a conduit 600. By integrally arranging the water supply waterway 1 on the water box 2 of the additive dispensing device 100, the outlet of the water supply waterway 1 is directly connected to the liquid outlet structure 500 to jointly spray the additive and the water drawn out through the water supply waterway 1, thereby achieving the purpose of directly spraying and dispensing the additive dispensing device 100 outward through the liquid outlet structure 500 without passing through the water box part of the dispensing device 100. Preferably, the liquid outlet structure 500 can be any of the nozzle structures in the prior art, which has a spraying outlet opened towards the rotating drum of the washing machine for spraying and dispensing the mixed liquid into the rotating drum of the washing machine.

[0054] As Figures 1 to 7 shown, in the embodiment of the present invention, a plurality of venturi tubes 19 are arranged side by side on the water supply waterway 1. The negative pressure suction ports 191 of each venturi tube 19 are all connected to the external atmosphere. Under the action of the additive mixture flowing through each venturi tube 19, a negative pressure is formed at the negative pressure suction port 191, and the external air enters the venturi tube 19 from the negative pressure suction port 191 and is mixed with the additive mixture flowing through the venturi tube 19, triggering it to generate foam to form a mixture containing foam. Thus, the additive mixture containing foam is directly sprayed onto the load to be processed in the washing tub 300 through the liquid outlet structure 500, and the load is spray-washed with the foamed additive mixture to achieve a washing effect with less water and higher washing efficiency. At the same time, by arranging a plurality of venturi tubes 19 side by side, each venturi tube 19 can allow part of the additive mixture to flow through, so as to use a plurality of venturi tubes 19 to draw in multiple streams of air to foam the additive mixture, thereby significantly improving the foaming efficiency of the additive mixture, which is a significant technological progress.

[0055] In an embodiment of the present invention, an installation part 110 protruding radially from the inner wall of the water supply waterway 1 is provided in the water supply waterway 1. The installation part 110 divides the water supply waterway 1 into an upstream part 8 and a downstream part 9; each Venturi tube 19 is installed on the installation part 110, and both ends of each Venturi tube 19 are respectively communicated with the upstream part 8 and the downstream part 9 of the water supply waterway. Thus, the water supply waterway 1 is blocked by the installation part 110, so that the additive mixture in the upstream part 8 of the water supply waterway 1 needs to flow through a Venturi tube 19 to jump over the installation part 110 and flow to the downstream part, so as to ensure that all the additive mixture can be used to extract air and mix with the air to foam, thereby significantly improving the foaming efficiency of the additive mixture.

[0056] In an embodiment of the present invention, an air vent cavity 120 is provided on the lower side of the installation part 110. The air vent cavity 120 is communicated with the outside atmosphere through a ventilation channel 121. The ventilation channel 121 can be directly communicated with an opening formed on the outer wall of the housing of the dosing device 100 to achieve the effect of being communicated with the outside atmosphere; the ventilation channel 121 can also be connected to the internal cavity of the housing of the dosing device and be communicated with the outside atmosphere through an opening at the front end of the cavity; naturally, the ventilation channel 121 can also be connected to the inside of the drum of the washing machine and be communicated with the outside atmosphere through a ventilation opening formed on the drum, and other setting methods are also possible.

[0057] Meanwhile, in an embodiment of the present invention, the negative pressure suction ports 191 of each Venturi tube 19 are all opened downward, and the installation part 110 is provided with a notch 112 that communicates the negative pressure suction port 191 with the air vent cavity 120, so that each Venturi tube 19 is communicated with the same air vent cavity 120, and thus the technical effect that each Venturi tube 19 is connected to the atmosphere and can suck in air to foam the flowing additive mixture is achieved.

[0058] In the embodiment of the present invention, the additive delivery device includes a water box 2, and the top of the water box 2 is buckled with an upper cover 3; the water supply waterway 1 is integrated in the upper cover 3; the upper cover 3 is composed of an upper cover body 31 and a lower cover body 32 buckled up and down, and the two cover bodies are provided with a matching concave-convex structure on the opposite surfaces, and the above-mentioned concave-convex structure forms a gap channel between the buckled contact surfaces of the two cover bodies, and the above-mentioned gap channel constitutes the water supply waterway 1; preferably, the upper cover body and the lower cover body are connected by a welding process to fix and assemble the upper cover body and the lower cover body, and the relative concave-convex structures are welded and connected as a whole, so that the water supply waterway integrated in the upper cover will not leak, and the upper and lower cover bodies can be fixed and assembled as a whole. At the same time, the upper cover body 31 is provided with a mounting portion 110 protruding downward, located in the water supply waterway 1, and composed of a block structure, and each venturi tube 19 is horizontally extended in the axis and correspondingly plugged and installed on the mounting portion 110. A groove-like structure which is concave downward and open on the upper side is provided on the lower cover body 32, and the bottom wall of the mounting portion 110 is correspondingly engaged with the upper opening of the groove-like structure, so that the internal space of the groove-like structure constitutes a ventilation cavity 120; the bottom wall of the mounting portion 110 is in sealing contact with the notch of the groove-like structure, so that the ventilation cavity 120 is separated from the water supply waterway 1.

[0059] Preferably, in order to ensure the positioning accuracy when the upper and lower cover bodies are snapped together, two vertical ribs 122 are provided on the bottom wall of the lower cover body 32, which protrude upward and are arranged at intervals along the liquid flow direction in the water supply waterway 1; two vertical matching ribs 114 are provided on the bottom wall of the mounting portion 110, which protrude downward and are arranged at intervals along the liquid flow direction in the water supply waterway 1; the two vertical ribs 122 and the two vertical matching ribs 114 are arranged in a one-to-one corresponding manner, and the lower end of the vertical rib 122 abuts against the upper end of the vertical matching rib 114 and is connected as a whole through a welding process, so that the vertical rib 122 is connected as a whole with the vertical matching rib 114 at the junction, thereby preventing the liquid in the water supply waterway 1 from entering the ventilation cavity 120 from the junction of the upper and lower cover bodies.

[0060] In the embodiment of the present invention, a plurality of branch channels 111 arranged at horizontal intervals are provided in the block-shaped mounting portion 110, and the axes of the branch channels 111 are parallel to the liquid flow direction in the water supply channel 1; preferably, the axes of the branch channels 111 are in the same horizontal plane, and the axes of the branch channels 111 are arranged at equal intervals in the horizontal vertical direction along the liquid flow direction in the water supply channel 1, so that the additive mixture in each part of the water supply channel 1 can uniformly flow into the corresponding Venturi tube 19. At the same time, both ends of each branch channel 111 are respectively communicated with the opposite sides of the block-shaped mounting portion 110; a Venturi tube 19 is coaxially inserted and installed in each branch channel 111, and both ends of the Venturi tube 19 are respectively communicated with the upstream part 8 and the downstream part 9 of the water supply channel 1 on the opposite sides of the block-shaped mounting portion 110, so that the additive mixture foams through the Venturi tube 19 and then flows into the downstream part 9 of the water supply channel 1.

[0061] In addition, a notch 112 is formed on the lower side wall of the block-shaped mounting portion 110, and the notch 112 extends in the vertical direction along the liquid flow direction in the feeding channel 1. The notch 112 communicates each branch channel 111 with the ventilation cavity 120 below; the notch 112 is directly below the negative pressure suction port 191 of each Venturi tube 19, so that the inside of the pipeline of each Venturi tube 19 is communicated with the ventilation cavity 120 through the negative pressure suction port 191 and the notch 112. Two rings of sealing rings 190 are sleeved on the outer pipe wall of the Venturi tube 19, and the two rings of sealing rings 190 are respectively located on the upstream side and the downstream side of the notch 112, and are used for sealing the gap between the Venturi tube 19 and the branch channel 111, so as to prevent the liquid flowing through in the water supply channel 1 from entering the ventilation cavity 120 through the above gap.

[0062] Preferably, a semi-circular opening is formed on the wall of the Venturi tube 19 and opens downward and is arranged around half of the tube wall. The semi-circular opening is arranged directly above the strip-shaped notch 112, and the above semi-circular opening forms the negative pressure suction port 191 of the Venturi tube 19; in the liquid flow direction of the water supply channel 1, the width of the semi-circular opening is smaller than the width of the strip-shaped notch 112, so as to ensure that sufficient negative pressure can be generated at the negative pressure suction port 191 to suck the air in the outside atmosphere into the pipeline of the Venturi tube 19. Further preferably, the semi-circular opening is located on the side of the strip-shaped notch 112 close to the upstream part 8 of the water supply channel 1, so that the negative pressure suction port 191 formed by the semi-circular opening completely falls within the corresponding overlapping range of the strip-shaped notch 112, so that the inhaled air will not be interfered by the tube wall to cause turbulent flow interference.

[0063] In an embodiment of the present invention, the branch channel 111 is a straight pipe channel with an axis extending in the horizontal direction; the Venturi tube 19 is a straight pipe structure coaxially inserted into the straight pipe section. The straight pipe structure is divided into two sections with different outer peripheral radial dimensions, namely an inlet pipe section 194 with a smaller outer pipe diameter and an outlet pipe section 195 with a larger outer pipe diameter; the inlet pipe section 194 and the outlet pipe section 195 are coaxially connected. The non-connected end of the inlet pipe section 194 is the liquid inlet end 192 of the Venturi tube 19, and the non-connected end of the outlet pipe section 195 is the liquid outlet end 193 of the Venturi tube 19; the inlet pipe section 194 is correspondingly coaxially inserted into the branch channel 111. The outer peripheral radial dimension of the inlet pipe section 194 is equal to the inner peripheral aperture dimension of the branch channel 111. The outlet pipe section 195 is located outside the branch channel 111 and in the downstream part 9 of the water supply waterway 1. The outlet pipe section 195 is coaxially arranged with the inlet pipe section 194 and is connected through an annular right-angle stepped surface. The annular right-angle stepped surface is correspondingly abutted against the peripheral part of the branch channel 111 on the side of the annular end surface at the end of the inlet pipe section 194 facing the downstream part 9 of the water supply waterway 1 of the mounting part 110, so that after the Venturi tube 19 is correspondingly inserted and mounted on the mounting part 110, the above-mentioned abutting fit is used to position the insertion position.

[0064] Preferably, one end of the branch channel 111 communicating with the upstream part 8 of the water supply waterway 1 is provided with a circular annular rib 113 protruding radially inward. The inner peripheral radial dimension of the annular rib 113 is smaller than the outer peripheral wall radial dimension of the inlet pipe section 194 of the Venturi tube 19 and greater than or equal to the inner peripheral hole radial dimension of the inlet pipe section 194, so that after the inlet pipe section 194 of the Venturi tube 19 is correspondingly inserted into the branch channel 111, the insertion end is abutted against the annular rib 113 in a limiting manner, thereby achieving the effect of positioning the insertion position of the Venturi tube 19. Of course, in order to ensure the realization of the above-mentioned limiting abutment, the axial length of the inlet pipe section 194 of the Venturi tube 19 is equal to the axial length of the branch channel 111, so that the liquid inlet end surface of the inlet pipe section 194 and the liquid inlet annular end surface of the outlet pipe section 195 can both be in limiting abutment with the mounting part 110.

[0065] In an embodiment of the present invention, an installation convex 199 protruding outward is provided on the outer wall of the outlet pipe section 195. The extending direction of the installation convex 199 is any tangential direction of the outlet pipe section 195; preferably, the installation convex 199 is located near the liquid outlet end 193 of the outlet pipe section 195, so that the user can hold the Venturi tube 19 by using the installation convex 199 and drive it to be correspondingly inserted into the branch channel 111. At the same time, an installation post 130 protruding upward and located in the water supply waterway 1 is provided on the lower cover body 32. The installation convex 199 is correspondingly placed on the top of the installation post 130, and a screw 131 passes through the installation convex 199 from top to bottom and is threadedly engaged with the installation post 130 for installation.

[0066] In the embodiment of the present invention, the bottom wall and the top wall of the water supply channel 1 on the upstream side of the venturi tube 19 are both inclined surfaces 81 that gradually rise along the liquid flow direction, and the two inclined surfaces 81 are parallel and separated by a distance greater than the radial dimension of the outer tube wall of the venturi tube 19, so that the additive mixture flowing into the venturi tube 19 flows upward under the action of the upwardly inclined inner wall, reduces the liquid flow rate, and avoids the excessive pressure in the venturi tube 19; at the same time, the bottom wall and the top wall of the water supply channel 1 on the downstream side of the venturi tube 19 are both planes 91, and the two planes 91 are parallel and separated by a distance The diameter of the water supply channel 1 on the downstream side of the Venturi tube 19 is larger than the radial dimension of the outer tube wall of the Venturi tube 19; the spacing between the two inclined surfaces 81 is smaller than the spacing between the two planes 91, so that the diameter of the water supply channel 1 on the downstream side of the Venturi tube 19 is larger than that on the upstream side, so as to avoid the excessive pressure on the downstream side causing the additive mixed liquid to flow poorly; in particular, when more foam is generated on the downstream side of the Venturi tube 19, the larger size of the water supply channel 1 space can be used to buffer the foam, so as to avoid the foam accumulating at the liquid outlet of the Venturi tube 19 and affecting the smoothness of the liquid flow in the water supply channel 1.

[0067] Preferably, the bottom wall plane 91 of the water supply channel 1 on the downstream side of the venturi tube 19 is flush with the lowest point height of the bottom wall slope 81 of the water supply channel 1 on the upstream side of the venturi tube 19; the top wall plane 91 of the water supply channel 1 on the downstream side of the venturi tube 19 is flush with the highest point height of the top wall slope 81 of the water supply channel 1 on the upstream side of the venturi tube 19; further preferably, the lowest point height of the bottom wall slope 81 of the water supply channel 1 on the upstream side of the venturi tube 19 is flush with the bottom wall height of other parts of the water supply channel 1, and the lowest point height of the top wall slope 81 of the water supply channel 1 on the upstream side of the venturi tube 19 is flush with the top wall height of other parts of the water supply channel 1.

[0068] In the embodiment of the present invention, the internal pipeline of the venturi tube 19 is divided into three pipe sections which are connected in sequence and coaxially arranged from the liquid inlet end 192 to the liquid outlet end 193, namely a reduced pipe 196, a straight pipe 197 and an expanded pipe 198; the reduced pipe 196 is a conical pipe section whose aperture gradually narrows along the liquid flow direction; the straight pipe 197 is a cylindrical pipe with a consistent aperture, and the pipe diameter is greater than or equal to the maximum pipe diameter of the reduced pipe 196, or greater than or equal to the maximum pipe diameter of the expanded pipe 198; the expanded pipe 198 is a conical pipe with a gradually expanding aperture along the liquid flow direction; a semicircular opening is opened on the lower part of the pipe wall of the straight pipe 197, and the semicircular opening constitutes a negative pressure suction port 191; preferably, the negative pressure suction port 191 covers at least one-third of the height of the lower part of the pipe wall of the straight pipe 197.

[0069] In the embodiment of the present invention, a mixing structure 700 is provided on the water supply pipeline 1 upstream of the Venturi tube 19. The connection between the dosing unit and the water supply pipeline 1 is located on a part of the dosing pipeline 1 upstream of the mixing structure 700. The mixing structure 700 mixes the dosed additive and the water supply to form an additive mixture liquid.

[0070] A multi-stage mixing structure is provided in the water supply pipeline 1 of the additive dosing device 100 for forming a swirling water flow in the water supply pipeline 1 to mix the dosed additive with the incoming water; a liquid outlet structure 500, the outlet of the water supply pipeline 1 is connected to the liquid outlet structure 500 for discharging the mixed additive and water.

[0071] By providing a mixing structure in the water supply pipeline, the additive and water in the water supply pipeline are fully mixed, so that the additive and the incoming water extracted by the water supply pipeline of the additive dosing device are premixed evenly before entering the Venturi tube for foaming, so as to further improve the foaming efficiency of the additive mixture liquid, and thus achieve a significant technical progress of using the mixture liquid containing foam to perform enhanced essence washing on the clothes in the washing tub.

[0072] In the embodiment of the present invention, the mixing structure can be any existing structure that can mix the additive and the water supply flow; specifically, it can be as follows: Figure 7 As shown, a series of mixing chambers 16 are provided on the water supply pipeline 1, and a turbine 15 is provided in the mixing chamber 16. The liquid mixture composed of the additive and the incoming water flowing through the mixing chamber 16 drives the turbine 15 to rotate, mixing the dosed additive with the incoming water.

[0073] As Figures 1 to 7 shown, in this embodiment, the top of the water tank 2 of the additive dosing device 100 is an upper cover 3, the water supply pipeline 1 is arranged inside the upper cover 3, and the outlet of the water supply pipeline 1 is exposed on the outer peripheral side of the upper cover 3; the inlet end of the conduit 600 is connected to the outlet of the water supply pipeline 1, and the outlet end of the conduit 600 is connected to the liquid outlet structure 500 arranged outside the water tank 2; preferably, the upper cover 3 includes an upper cover body 31 and a lower cover body 32 that are buckled up and down, and the upper cover body 31 and the lower cover body 32 are spliced relatively to form the water supply pipeline 1 at the joint surface. Further preferably, the upper cover body 31 and the lower cover body 32 of the upper cover 3 are connected by a cladding process to form a closed and pressure-bearing water pipeline structure inside.

[0074] Thus, the water supply pipeline 1 of the additive dosing device 100 is integrally arranged on the upper cover 3, so that the incoming water and the additive of the dosing device 100 are directly discharged through the water supply pipeline 1 inside the upper cover 3, and then the effect that the additive directly flows out from the outlet on the outer peripheral side of the upper cover 3 for discharging is achieved.

[0075] In this embodiment, the dosing unit includes a liquid storage chamber for storing additives, and the liquid storage chamber is communicated with the water supply line 1; a power unit is further provided on the dosing device 100 to provide power for pumping the additives in the liquid storage chamber into the water supply line.

[0076] In this embodiment, the power unit can be a pump provided on the liquid extraction channel connecting the liquid storage chamber and the water supply line 1, to provide a driving force for the liquid in the liquid extraction channel to flow from the liquid storage chamber to the water supply line 1. In this embodiment, the power unit can also be provided with other existing structures, for example: the power unit is a suction pump, and the suction port of the suction pump is communicated with the water supply line 1, so as to form a negative pressure in the water supply line 1 and pump the additives in the liquid storage chamber to the water supply line 1 through the liquid extraction channel; and / or, the power unit can also be a Venturi tube provided on the water supply line 1. The Venturi tube is provided with a negative pressure area with a sudden change in pipe diameter. The negative pressure area can utilize the flowing water to form a negative pressure here. The negative pressure area of the Venturi tube is provided with a suction port, and the suction port is communicated with the liquid storage chamber through the liquid extraction channel (not marked in the drawings).

[0077] In this embodiment, the additive dosing device 100 includes a plurality of liquid storage chambers, and each liquid storage chamber can separately hold different types of additives, such as: detergents, fabric softeners, fragrance additives, disinfectants, etc.; a control device is provided on the dosing device 100, and the control device is used to control each liquid storage chamber to be selectively or combinedly communicated with the water supply line 1, so as to correspondingly dose any one or simultaneously dose multiple combined types of additives into the water supply line 1.

[0078] In this embodiment, the control device can be set to any existing structure that can achieve the above functions; for example: in this embodiment, each liquid storage chamber can be respectively communicated with the water supply line 1 through a flow channel provided with a control valve, so as to realize the separate or combined on-off control effect of each flow channel by controlling the opening and closing of each control valve, and further realize the purpose of independently dosing any type of additive or simultaneously dosing multiple types of additives; it can also be that each liquid storage chamber is correspondingly communicated with different inlets of the same reversing valve, the outlet of the reversing valve is communicated with the water supply line 1, and a rotatable valve core is provided in the reversing valve to control any one or a combination of inlets to be communicated with the outlet, which can also achieve the purpose of independently dosing any type of additive or simultaneously dosing multiple types of additives (not marked in the drawings).

[0079] In this embodiment, a liquid storage box is provided in the water box 2 of the dosing device 100, and the liquid storage box is slidably installed in the water box 2 of the additive dosing device 100; at least one liquid storage chamber for storing additives is provided in the liquid storage box, and each liquid storage chamber on the liquid storage box is communicated with the water supply line 1 through a communicating device, and a control device is provided on the communicating device to control each liquid storage chamber to be selectively or combinedly and controllably communicated with the water supply line 1.

[0080] In this embodiment, the inlet of the water supply waterway 1 is provided on the outer wall of the water box 2. The inlet of the water supply waterway 1 is communicated with the water supply source, so that the inlet water flow can flow into the water supply waterway 1.

[0081] In this embodiment, the additive dispensing device 100 is installed on the washing machine. The water supply source of the additive dispensing device is the water inlet pipe of the washing machine. The inlet of the water supply waterway 1 is communicated with the water inlet pipe of the washing machine, so that the washing water can flow into the water supply waterway 1 through the inlet. An inlet joint is provided on the water box 2 of the additive dispensing device 100. Both ends of the inlet joint are respectively communicated with the inlet of the water supply waterway 1 and the water inlet pipe of the washing machine. Further preferably, a control valve for controlling the on-off of the waterway is installed at the inlet joint.

[0082] By providing the above-mentioned additive dispensing device 100 on the washing machine according to the present invention, the additive of the washing machine directly flows through the water supply waterway 1 to the liquid outlet structure 500 and is directly sprayed into the washing tub 300 by the liquid outlet structure 500. Furthermore, the additive of the washing machine does not pass through the water box and the water storage tub 200 outside the washing tub 300, but directly flows into the washing tub 300 through the waterway of the dispensing device 100 and is sprayed onto the load to be processed, thereby achieving the purpose of directly spraying the additive solution onto the load to be processed in the washing tub 300. At the same time, through the above arrangement, the washing machine equipped with the above-mentioned additive dispensing device 100 can directly spray the additive solution formed by mixing the additive with a small amount of water in the water supply waterway 1 onto the load to be processed in the washing tub 300, thereby significantly improving the utilization rate of the dispensed additive.

[0083] In this embodiment, a liquid suction port is provided in the middle of the water supply waterway 1. The liquid suction port is communicated with the dispensing unit, so that the additive is sucked into the water supply waterway 1 from the liquid suction port. Preferably, the water supply waterway is communicated with the outlet of the pump or the position of the liquid suction venturi tube. The inlet of the pump or the negative pressure port of the venturi tube is communicated with the outlet of the liquid suction flow path. The inlet of the liquid suction flow path is communicated with the outlet of the connector. The multiple inlets of the connector are respectively communicated with the respective liquid storage cavities, so as to achieve the purpose of sucking the additive in the liquid storage cavity into the water supply waterway 1 under the driving action of the pump or the liquid suction venturi tube through the above-mentioned flow path.

[0084] In this embodiment, the liquid outlet structure 500 can be provided on the housing of the washing machine, and / or the door body, and / or the water storage tub 200, and / or the window gasket 400. The spray outlet of the liquid outlet structure 500 is opened towards the inside of the washing tub 300, and the additive sprayed by the liquid outlet structure 500 is directly sprayed into the inside of the washing tub 300.

[0085] Preferably, in this embodiment, the specific installation method of the liquid outlet structure 500 is as follows:

[0086] Such as Figures 1 to 2As shown, a circle of window pad 400 is installed at the mouth of the water drum 200, and the window pad 400 is cylindrical. One end of the cylindrical window pad 400 is connected to the mouth of the water drum 200, and the other end is connected to the washing machine housing to form a channel; the mouth of the washing drum 300 is relatively connected to one end of the above-mentioned channel, and the washing machine housing is provided with a clothing loading port corresponding to the other end of the above-mentioned channel. The washing machine housing is provided with a door body that can open and close the clothing loading port accordingly. When the door body is closed, a closed space is formed inside the water drum 200; there is a gap space between the door body and the window pad 400, and the gap space is directly connected to the inside of the washing drum 300 through the mouth of the washing drum 300. The liquid outlet structure 500 is installed on the top of the window pad 400, and the liquid outlet structure 500 passes through the window pad 400. The portion of the liquid outlet structure 500 located on the inner side of the window pad 400 has a spray outlet, and the portion located on the outer side of the window pad 400 has an inlet. The liquid outlet structure 500 has a flow channel inside, and the two ends of the flow channel are respectively connected with the inlet and the spray outlet. The spray outlet is arranged toward the mouth of the washing drum 300, so that the additive solution sprayed from the liquid outlet structure 500 can be directly sprayed into the washing drum 300, so as to realize the significant technical progress of directly spraying the additive onto the load to be processed in the washing drum 300 and improving the efficiency of additive delivery.

[0087] In this embodiment, the liquid outlet structure 500 may be any existing injection structure, and the injection outlet may be configured as a plurality of injection holes arranged at intervals, or may be configured as a single opening.

[0088] In this embodiment, a separate conduit 600 is provided in the washing machine, which is located outside the water box of the additive delivery device 100 and outside the water drum 200. The two ends of the conduit 600 are plugged and connected with the inlet of the liquid outlet structure 500 and the outlet of the water supply waterway 1, respectively, so that the additive solution supplied by the water supply waterway 1 can be directly drained to the liquid outlet structure 500 through the conduit 600, so as to achieve the effect of direct injection delivery into the washing drum 300 of the washing machine. Preferably, the conduit 600 is made of rubber or other materials, and can be bent and deformed.

[0089] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. An additive delivery device, include: A water supply waterway, for water to flow through; A dosing unit, used for dosing additives into the water supply channel to mix with the water supply flow to form an additive mixed liquid; Features: A plurality of venturi tubes arranged in parallel are provided on the water supply waterway, and the negative pressure suction port of each venturi tube is connected to the external atmosphere. Under the action of the liquid flowing through each venturi tube, the external air enters from the negative pressure suction port and mixes with the additive mixed liquid to stimulate it to produce foam.

2. An additive delivery device according to claim 1, It is characterized in that A mounting portion radially protruding from the inner wall of the water channel is provided in the water supply channel, and the mounting portion divides the water supply channel into an upstream part and a downstream part; each venturi tube is installed on the mounting portion, and both ends of the pipe are respectively connected to the upstream part and the downstream part of the water supply channel.

3. An additive delivery device according to claim 2, It is characterized in that A ventilation cavity is provided at the lower side of the mounting portion, and the ventilation cavity is communicated with the outside atmosphere through a ventilation channel; The negative pressure suction port of each venturi tube is opened downwards, and a notch for connecting the negative pressure suction port with the ventilation cavity is arranged on the mounting portion, so that each venturi tube is connected with the same ventilation cavity.

4. An additive delivery device according to claim 3, It is characterized in that The additive delivery device comprises a water box, and a water supply channel is integrated in an upper cover of the water box; The upper cover is composed of an upper cover body and a lower cover body that are buckled up and down, and the two cover bodies are provided with matching concave and convex structures on the surfaces facing each other, so that a water supply channel is formed between the buckled contact surfaces of the two cover bodies; The upper cover body is provided with a downwardly protruding, block-shaped mounting portion located inside the water supply channel, and each venturi tube is plugged and installed on the same mounting portion to connect the water supply channel portions on both sides of the mounting portion; The lower cover body is provided with a groove-shaped structure which is concave downward and open on the upper side, and the mounting portion is correspondingly buckled with the upper opening of the groove-shaped structure, so that the groove-shaped structure forms a ventilation cavity.

5. An additive delivery device according to claim 4, It is characterized in that A plurality of horizontally spaced branch channels are arranged in the block-shaped mounting portion, and two ends of each branch channel are respectively connected to two opposite sides of the block-shaped mounting portion; A venturi tube is coaxially plugged and installed in each branch channel, and the two ends of the venturi tube are respectively connected to the upstream part and the downstream part of the water supply waterway on the opposite sides of the block-shaped installation part; A notch is provided on the lower side of the block-shaped mounting portion, and the notch is located directly below the negative pressure suction port of each venturi tube, so as to connect the inside of the venturi tube pipeline with the ventilation cavity; Two sealing rings are arranged on the outer tube wall of the venturi tube, and the two sealing rings are respectively located on the upstream side and the downstream side of the notch, and are used to seal the gap between the venturi tube and the branch channel; Preferably, a semi-annular opening is provided on the wall of the venturi tube, which is opened downward and arranged half a circle around the tube wall. The semi-annular opening is arranged directly above the strip-shaped notch, and the width of the semi-annular opening is smaller than the width of the strip-shaped notch.

6. An additive delivery device according to claim 5, It is characterized in that The branch channel is a straight pipe section with the axis extending in the horizontal direction; The venturi tube comprises a coaxial liquid inlet pipe section and a liquid outlet pipe section connected with each other in different diameters; The liquid inlet pipe section with a small diameter is coaxially inserted into the branch channel correspondingly, and the liquid outlet pipe section with a large diameter is located outside the mounting block and in the downstream part of the water supply waterway; the radial dimension of the outer periphery of the pipe wall of the liquid inlet pipe section is equal to the radial dimension of the inner peripheral pipe hole of the branch channel; the end face where the liquid inlet pipe section is connected to the liquid outlet pipe section abuts against the side of the mounting part facing the downstream part of the water supply waterway. Preferably, one end of the branch channel communicating with the upstream part of the water supply waterway is provided with a circular annular rib protruding radially inward, and the radial dimension of the inner periphery of the annular rib is smaller than the radial dimension of the outer peripheral pipe wall of the liquid inlet pipe section of the Venturi tube. Preferably, an installation convex protruding outward is provided on the outer pipe wall of the liquid outlet pipe section, and an installation post protruding upward is provided on the lower cover body. The installation convex is correspondingly placed on the top of the installation post, and a screw passes through the installation convex from top to bottom and is threadedly engaged with the installation post for installation.

7. An additive dosing device according to any one of claims 1 to 6, characterized in that, The bottom wall and the top wall of the water supply waterway on the upstream side of the Venturi tube are both inclined planes that gradually rise along the liquid flow direction. The two inclined planes are parallel to each other, and the distance between them is greater than the radial dimension of the outer pipe wall of the Venturi tube; The bottom wall and the top wall of the water supply waterway on the downstream side of the Venturi tube are both flat planes. The two flat planes are parallel to each other, and the distance between them is greater than the radial dimension of the outer pipe wall of the Venturi tube; The distance between the two inclined planes is smaller than the distance between the two flat planes; Preferably, the bottom wall plane of the water supply waterway on the downstream side of the Venturi tube is flush with the lowest point height of the bottom wall inclined plane of the water supply waterway on the upstream side of the Venturi tube; The top wall plane of the water supply waterway on the downstream side of the Venturi tube is flush with the highest point height of the top wall inclined plane of the water supply waterway on the upstream side of the Venturi tube.

8. An additive dosing device according to any one of claims 1 to 6, characterized in that, The Venturi tube is divided into three coaxially arranged pipe sections that are successively connected and communicated from the liquid inlet end to the liquid outlet end, namely a reduced-diameter pipe section, a straight pipe section, and an enlarged-diameter pipe section; The reduced-diameter pipe section is a conical pipe section with a gradually narrowing aperture along the liquid flow direction; The straight pipe section is a cylindrical pipe section with a consistent aperture, and the pipe diameter is greater than or equal to the maximum pipe diameter of the reduced-diameter pipe section or greater than or equal to the maximum pipe diameter of the enlarged-diameter pipe section; The enlarged-diameter pipe section is a conical pipe section with a gradually expanding aperture along the liquid flow direction; A semi-circular opening extending along the circumferential direction of the pipeline is opened on the lower part of the pipe wall of the straight pipe section, and the semi-circular opening constitutes a negative pressure suction port; Preferably, the negative pressure suction port covers at least one-third of the height part of the lower part of the pipe wall of the straight pipe section.

9. An additive dosing device according to any one of claims 1 to 8, characterized in that, A mixing structure is provided in the upstream part of the water supply waterway upstream of the Venturi tube. The connection between the dosing unit and the water supply waterway is located upstream of the mixing structure, and the mixing structure mixes the dosed additive and the water supply to form an additive mixture.

10. A washing machine, which includes a washing tub for holding a load to be processed, characterized in that: It further includes the additive dispensing device according to any one of claims 1 to 9 above. The inlet of the water supply waterway of the additive dispensing device is connected to the washing machine water inlet pipe, and the outlet of the water supply waterway is connected to the liquid outlet structure. The liquid outlet structure is arranged on the housing of the washing machine, and / or the door body, and / or the water tub, and / or the window gasket. The liquid outlet structure sprays a foam-containing mixture formed by mixing and dispensing additives and water supply into the washing tub of the washing machine.

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